Merge branch 'master' into stash_glyphcache

Conflicts:
	make/scripts/tests.sh
	src/jogl/classes/com/jogamp/graph/curve/OutlineShape.java
	src/jogl/classes/com/jogamp/graph/curve/Region.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/GLRegion.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/RegionRenderer.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/Renderer.java
	src/jogl/classes/com/jogamp/graph/curve/opengl/TextRenderer.java
	src/jogl/classes/com/jogamp/graph/font/Font.java
	src/jogl/classes/com/jogamp/opengl/math/VectorUtil.java
	src/jogl/classes/jogamp/graph/curve/text/GlyphShape.java
	src/jogl/classes/jogamp/graph/curve/text/GlyphString.java
	src/jogl/classes/jogamp/graph/font/typecast/TypecastFont.java
	src/jogl/classes/jogamp/graph/font/typecast/TypecastGlyph.java
	src/jogl/classes/jogamp/graph/font/typecast/TypecastRenderer.java

268 files changed, 26849 insertions, 12203 deletions

diff --git a/src/jogl/classes/jogamp/opengl/Debug.java b/src/jogl/classes/jogamp/opengl/Debug.java
index 4287c1960..9332b670a 100644
--- a/src/jogl/classes/jogamp/opengl/Debug.java
+++ b/src/jogl/classes/jogamp/opengl/Debug.java
@@ -1,21 +1,22 @@
 /*
- * Copyright (c) 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ * Copyright (c) 2010 JogAmp Community. All rights reserved.
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -28,17 +29,20 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl;
 
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
 import com.jogamp.common.util.PropertyAccess;
 
 /** Helper routines for logging and debugging. */
@@ -47,9 +51,15 @@ public class Debug extends PropertyAccess {
   // Some common properties
   private static final boolean verbose;
   private static final boolean debugAll;
-  
+
   static {
-    PropertyAccess.addTrustedPrefix("jogl.", Debug.class);
+    AccessController.doPrivileged(new PrivilegedAction<Object>() {
+        @Override
+        public Object run() {
+            PropertyAccess.addTrustedPrefix("jogl.");
+            return null;
+    } } );
+
     verbose = isPropertyDefined("jogl.verbose", true);
     debugAll = isPropertyDefined("jogl.debug", true);
     if (verbose) {
@@ -60,27 +70,18 @@ public class Debug extends PropertyAccess {
     }
   }
 
-  public static final boolean isPropertyDefined(final String property, final boolean jnlpAlias) {
-    return PropertyAccess.isPropertyDefined(property, jnlpAlias, null);
-  }
-    
-  public static String getProperty(final String property, final boolean jnlpAlias) {
-    return PropertyAccess.getProperty(property, jnlpAlias, null);
-  }
-  
-  public static final boolean getBooleanProperty(final String property, final boolean jnlpAlias) {
-      return PropertyAccess.getBooleanProperty(property, jnlpAlias, null);
-  }
-  
-  public static boolean verbose() {
+  /** Ensures static init block has been issues, i.e. if calling through to {@link PropertyAccess#isPropertyDefined(String, boolean)}. */
+  public static final void initSingleton() {}
+
+  public static final boolean verbose() {
     return verbose;
   }
 
-  public static boolean debugAll() {
+  public static final boolean debugAll() {
     return debugAll;
   }
 
-  public static boolean debug(String subcomponent) {
+  public static final boolean debug(String subcomponent) {
     return debugAll() || isPropertyDefined("jogl.debug." + subcomponent, true);
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLibraryBundleInfo.java
index f77f1135b..578f416b7 100644
--- a/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,19 +20,19 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl;
 
 import java.util.List;
 import java.util.ArrayList;
 
 public abstract class DesktopGLDynamicLibraryBundleInfo extends GLDynamicLibraryBundleInfo {
-    private static List<String> glueLibNames;
+    private static final List<String> glueLibNames;
     static {
         glueLibNames = new ArrayList<String>();
 
@@ -47,11 +47,11 @@ public abstract class DesktopGLDynamicLibraryBundleInfo extends GLDynamicLibrary
     public final List<String> getGlueLibNames() {
         return glueLibNames;
     }
-    
+
     @Override
-    public boolean useToolGetProcAdressFirst(String funcName) {
+    public final boolean useToolGetProcAdressFirst(String funcName) {
         return true;
     }
-    
+
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLookupHelper.java b/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLookupHelper.java
index ff49303ca..c1e1d1821 100644
--- a/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLookupHelper.java
+++ b/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLookupHelper.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,12 +20,12 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl;
 
 import com.jogamp.common.os.NativeLibrary;
@@ -37,9 +37,10 @@ public class DesktopGLDynamicLookupHelper extends GLDynamicLookupHelper {
         super(info);
     }
 
-    public DesktopGLDynamicLibraryBundleInfo getDesktopGLBundleInfo() { return (DesktopGLDynamicLibraryBundleInfo) getBundleInfo(); }
+    public final DesktopGLDynamicLibraryBundleInfo getDesktopGLBundleInfo() { return (DesktopGLDynamicLibraryBundleInfo) getBundleInfo(); }
 
-    public synchronized boolean loadGLULibrary() {
+    @Override
+    public final synchronized boolean loadGLULibrary() {
         /** hacky code .. where all platform GLU libs are tried ..*/
         if(null==gluLib) {
             List<String> gluLibNames = new ArrayList<String>();
diff --git a/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java b/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
index 610f08e21..fd59ecfd4 100644
--- a/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
+++ b/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,20 +29,25 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl;
 
-import javax.media.opengl.*;
+import java.util.HashMap;
+import java.util.StringTokenizer;
 
-import java.util.*;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2GL3;
+import javax.media.opengl.GLContext;
+
+import com.jogamp.common.util.VersionNumber;
 
 /**
  * A utility object intended to be used by implementations to act as a cache
@@ -57,7 +62,7 @@ final class ExtensionAvailabilityCache {
   }
 
   /**
-   * Flush the cache. 
+   * Flush the cache.
    */
   final void flush()
   {
@@ -78,24 +83,24 @@ final class ExtensionAvailabilityCache {
   }
 
   final boolean isInitialized() {
-    return initialized && !availableExtensionCache.isEmpty() ;
+    return initialized;
   }
 
   final int getTotalExtensionCount() {
     validateInitialization();
     return availableExtensionCache.size();
   }
-  
+
   final boolean isExtensionAvailable(String glExtensionName) {
     validateInitialization();
-    return availableExtensionCache.contains(glExtensionName);
+    return null != availableExtensionCache.get(glExtensionName);
   }
 
   final int getPlatformExtensionCount() {
     validateInitialization();
     return glXExtensionCount;
   }
-  
+
   final String getPlatformExtensionsString() {
     validateInitialization();
     return glXExtensions;
@@ -105,7 +110,7 @@ final class ExtensionAvailabilityCache {
     validateInitialization();
     return glExtensionCount;
   }
-  
+
   final String getGLExtensionsString() {
     validateInitialization();
     if(DEBUG) {
@@ -149,7 +154,6 @@ final class ExtensionAvailabilityCache {
                   ", use "+ ( useGetStringi ? "glGetStringi" : "glGetString" ) );
       }
 
-      HashSet<String> glExtensionSet = new HashSet<String>(gl.isGLES() ? 50 : 320); // far less gl extension expected on mobile 
       if(useGetStringi) {
           GL2GL3 gl2gl3 = gl.getGL2GL3();
           final int count;
@@ -160,78 +164,84 @@ final class ExtensionAvailabilityCache {
           }
           StringBuilder sb = new StringBuilder();
           for (int i = 0; i < count; i++) {
-              if(i > 0) {
-                  sb.append(" ");                
-              }
               final String ext = gl2gl3.glGetStringi(GL.GL_EXTENSIONS, i);
-              glExtensionSet.add(ext);
-              sb.append(ext);
+              if( null == availableExtensionCache.put(ext, ext) ) {
+                  // new one
+                  if( 0 < i ) {
+                      sb.append(" ");
+                  }
+                  sb.append(ext);
+              }
           }
           if(0==count || sb.length()==0) {
               // fall back ..
               useGetStringi=false;
           } else {
               glExtensions = sb.toString();
+              glExtensionCount = count;
           }
       }
       if(!useGetStringi) {
           glExtensions = gl.glGetString(GL.GL_EXTENSIONS);
           if(null != glExtensions) {
-              StringTokenizer tok = new StringTokenizer(glExtensions);
+              final StringTokenizer tok = new StringTokenizer(glExtensions);
+              int count = 0;
               while (tok.hasMoreTokens()) {
-                  glExtensionSet.add(tok.nextToken().trim());
+                  final String ext = tok.nextToken().trim();
+                  if( null == availableExtensionCache.put(ext, ext) ) {
+                      count++;
+                  }
               }
+              glExtensionCount = count;
           }
       }
-      glExtensionCount = glExtensionSet.size(); 
       if (DEBUG) {
           System.err.println(getThreadName() + ":ExtensionAvailabilityCache: GL_EXTENSIONS: "+glExtensionCount+
                                                ", used "+ ( useGetStringi ? "glGetStringi" : "glGetString" ) );
       }
 
       // Platform Extensions
-      HashSet<String> glXExtensionSet = new HashSet<String>(50);
-      {         
-          // unify platform extension .. might have duplicates          
-          StringTokenizer tok = new StringTokenizer(context.getPlatformExtensionsStringImpl().toString());
-          while (tok.hasMoreTokens()) {
-              glXExtensionSet.add(tok.nextToken().trim());              
-          }
+      {
+          // unify platform extension .. might have duplicates
           final StringBuilder sb = new StringBuilder();
-          for(Iterator<String> iter = glXExtensionSet.iterator(); iter.hasNext(); ) {
-              sb.append(iter.next());
-              if(iter.hasNext()) {
-                  sb.append(" ");                
+          final StringTokenizer tok = new StringTokenizer(context.getPlatformExtensionsStringImpl().toString());
+          int count = 0;
+          while (tok.hasMoreTokens()) {
+              final String ext = tok.nextToken().trim();
+              if( null == availableExtensionCache.put(ext, ext) ) {
+                  // new one
+                  if( 0 < count ) {
+                      sb.append(" ");
+                  }
+                  sb.append(ext);
+                  count++;
               }
           }
           glXExtensions = sb.toString();
-          glXExtensionCount = glXExtensionSet.size();
+          glXExtensionCount = count;
       }
 
-      availableExtensionCache.addAll(glExtensionSet);
-      availableExtensionCache.addAll(glXExtensionSet);
-
       if (DEBUG) {
           System.err.println(getThreadName() + ":ExtensionAvailabilityCache: GLX_EXTENSIONS: "+glXExtensionCount);
           System.err.println(getThreadName() + ":ExtensionAvailabilityCache: GL vendor: " + gl.glGetString(GL.GL_VENDOR));
           System.err.println(getThreadName() + ":ExtensionAvailabilityCache: ALL EXTENSIONS: "+availableExtensionCache.size());
       }
 
-      if(!context.isGLES()) {
-          int major[] = new int[] { context.getGLVersionMajor() };
-          int minor[] = new int[] { context.getGLVersionMinor() };
-          while (GLContext.isValidGLVersion(major[0], minor[0])) {
-              availableExtensionCache.add("GL_VERSION_" + major[0] + "_" + minor[0]);
-              if (DEBUG) {
-                  System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Added GL_VERSION_" + major[0] + "_" + minor[0] + " to known extensions");
-              }
-              if(!GLContext.decrementGLVersion(major, minor)) break;
+      final int ctxOptions = context.getCtxOptions();
+      final VersionNumber version = context.getGLVersionNumber();
+      int major[] = new int[] { version.getMajor() };
+      int minor[] = new int[] { version.getMinor() };
+      do{
+          final String GL_XX_VERSION = ( context.isGLES() ? "GL_ES_VERSION_" : "GL_VERSION_" ) + major[0] + "_" + minor[0];
+          availableExtensionCache.put(GL_XX_VERSION, GL_XX_VERSION);
+          if (DEBUG) {
+              System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Added "+GL_XX_VERSION+" to known extensions");
           }
-      }
+      } while( GLContext.decrementGLVersion(ctxOptions, major, minor) );
 
       // put a dummy var in here so that the cache is no longer empty even if
       // no extensions are in the GL_EXTENSIONS string
-      availableExtensionCache.add("<INTERNAL_DUMMY_PLACEHOLDER>");
+      availableExtensionCache.put("<INTERNAL_DUMMY_PLACEHOLDER>", "<INTERNAL_DUMMY_PLACEHOLDER>");
 
       initialized = true;
   }
@@ -245,10 +255,8 @@ final class ExtensionAvailabilityCache {
   private int glExtensionCount = 0;
   private String glXExtensions = null;
   private int glXExtensionCount = 0;
-  private HashSet<String> availableExtensionCache = new HashSet<String>(50);
+  private final HashMap<String, String> availableExtensionCache = new HashMap<String, String>(100);
 
-  static String getThreadName() {
-    return Thread.currentThread().getName();
-  }
+  static String getThreadName() { return Thread.currentThread().getName(); }
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/FPSCounterImpl.java b/src/jogl/classes/jogamp/opengl/FPSCounterImpl.java
index 27569d210..08a1fe882 100644
--- a/src/jogl/classes/jogamp/opengl/FPSCounterImpl.java
+++ b/src/jogl/classes/jogamp/opengl/FPSCounterImpl.java
@@ -41,39 +41,39 @@ public class FPSCounterImpl implements FPSCounter {
     private long fpsStartTime, fpsLastUpdateTime, fpsLastPeriod, fpsTotalDuration;
     private int  fpsTotalFrames;
     private float fpsLast, fpsTotal;
-    
+
     /** Creates a disabled instance */
     public FPSCounterImpl() {
         setUpdateFPSFrames(0, null);
     }
-    
+
     /**
      * Increases total frame count and updates values if feature is enabled and
      * update interval is reached.<br>
-     * 
+     *
      * Shall be called by actual FPSCounter implementing renderer, after display a new frame.
-     *  
+     *
      */
     public final synchronized void tickFPS() {
         fpsTotalFrames++;
         if(fpsUpdateFramesInterval>0 && fpsTotalFrames%fpsUpdateFramesInterval == 0) {
             final long now = TimeUnit.NANOSECONDS.toMillis(System.nanoTime());
             fpsLastPeriod = now - fpsLastUpdateTime;
-            fpsLastPeriod = Math.max(fpsLastPeriod, 1); // div 0 
-            fpsLast = ( (float)fpsUpdateFramesInterval * 1000f ) / ( (float) fpsLastPeriod ) ; 
-            
+            fpsLastPeriod = Math.max(fpsLastPeriod, 1); // div 0
+            fpsLast = ( (float)fpsUpdateFramesInterval * 1000f ) / ( (float) fpsLastPeriod ) ;
+
             fpsTotalDuration = now - fpsStartTime;
             fpsTotalDuration = Math.max(fpsTotalDuration, 1); // div 0
             fpsTotal= ( (float)fpsTotalFrames * 1000f ) / ( (float) fpsTotalDuration ) ;
-            
+
             if(null != fpsOutputStream) {
                 fpsOutputStream.println(toString());
             }
-            
+
             fpsLastUpdateTime = now;
         }
     }
-    
+
     public StringBuilder toString(StringBuilder sb) {
         if(null==sb) {
             sb = new StringBuilder();
@@ -81,59 +81,71 @@ public class FPSCounterImpl implements FPSCounter {
         String fpsLastS = String.valueOf(fpsLast);
         fpsLastS = fpsLastS.substring(0, fpsLastS.indexOf('.') + 2);
         String fpsTotalS = String.valueOf(fpsTotal);
-        fpsTotalS = fpsTotalS.substring(0, fpsTotalS.indexOf('.') + 2);                
+        fpsTotalS = fpsTotalS.substring(0, fpsTotalS.indexOf('.') + 2);
         sb.append(fpsTotalDuration/1000 +" s: "+ fpsUpdateFramesInterval+" f / "+ fpsLastPeriod+" ms, " + fpsLastS+" fps, "+ fpsLastPeriod/fpsUpdateFramesInterval+" ms/f; "+
                   "total: "+ fpsTotalFrames+" f, "+ fpsTotalS+ " fps, "+ fpsTotalDuration/fpsTotalFrames+" ms/f");
         return sb;
     }
-    
+
+    @Override
     public String toString() {
         return toString(null).toString();
     }
-    
+
+    @Override
     public final synchronized void setUpdateFPSFrames(int frames, PrintStream out) {
         fpsUpdateFramesInterval = frames;
         fpsOutputStream = out;
         resetFPSCounter();
     }
-    
+
+    @Override
     public final synchronized void resetFPSCounter() {
         fpsStartTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime()); // overwrite startTime to real init one
         fpsLastUpdateTime   = fpsStartTime;
         fpsLastPeriod = 0;
         fpsTotalFrames = 0;
         fpsLast = 0f; fpsTotal = 0f;
+        fpsLastPeriod = 0; fpsTotalDuration=0;
     }
 
+    @Override
     public final synchronized int getUpdateFPSFrames() {
         return fpsUpdateFramesInterval;
     }
-    
-    public final synchronized long getFPSStartTime()   { 
-        return fpsStartTime; 
+
+    @Override
+    public final synchronized long getFPSStartTime()   {
+        return fpsStartTime;
     }
 
+    @Override
     public final synchronized long getLastFPSUpdateTime() {
         return fpsLastUpdateTime;
     }
 
+    @Override
     public final synchronized long getLastFPSPeriod() {
         return fpsLastPeriod;
     }
-    
+
+    @Override
     public final synchronized float getLastFPS() {
         return fpsLast;
     }
-    
-    public final synchronized int getTotalFPSFrames() { 
-        return fpsTotalFrames; 
+
+    @Override
+    public final synchronized int getTotalFPSFrames() {
+        return fpsTotalFrames;
     }
 
-    public final synchronized long getTotalFPSDuration() { 
-        return fpsTotalDuration; 
+    @Override
+    public final synchronized long getTotalFPSDuration() {
+        return fpsTotalDuration;
     }
-    
+
+    @Override
     public final synchronized float getTotalFPS() {
         return fpsTotal;
-    }        
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java b/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
new file mode 100644
index 000000000..7cd685d5a
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
@@ -0,0 +1,739 @@
+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl;
+
+import java.io.PrintStream;
+import java.util.List;
+
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowException;
+import javax.media.nativewindow.WindowClosingProtocol;
+import javax.media.nativewindow.WindowClosingProtocol.WindowClosingMode;
+import javax.media.opengl.FPSCounter;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLAnimatorControl;
+import javax.media.opengl.GLAutoDrawable;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLEventListener;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLOffscreenAutoDrawable;
+import javax.media.opengl.GLProfile;
+import javax.media.opengl.GLRunnable;
+import javax.media.opengl.GLSharedContextSetter;
+
+import com.jogamp.common.util.locks.RecursiveLock;
+import com.jogamp.opengl.GLAutoDrawableDelegate;
+import com.jogamp.opengl.GLEventListenerState;
+import com.jogamp.opengl.GLStateKeeper;
+
+
+/**
+ * Abstract common code for GLAutoDrawable implementations.
+ *
+ * @see GLAutoDrawable
+ * @see GLAutoDrawableDelegate
+ * @see GLOffscreenAutoDrawable
+ * @see GLOffscreenAutoDrawableImpl
+ * @see GLPBufferImpl
+ * @see com.jogamp.newt.opengl.GLWindow
+ */
+public abstract class GLAutoDrawableBase implements GLAutoDrawable, GLStateKeeper, FPSCounter, GLSharedContextSetter {
+    public static final boolean DEBUG = GLDrawableImpl.DEBUG;
+    protected final GLDrawableHelper helper = new GLDrawableHelper();
+    protected final FPSCounterImpl fpsCounter = new FPSCounterImpl();
+
+    protected volatile GLDrawableImpl drawable; // volatile: avoid locking for read-only access
+    protected volatile GLContextImpl context;
+    protected boolean preserveGLELSAtDestroy;
+    protected GLEventListenerState glels;
+    protected GLStateKeeper.Listener glStateKeeperListener;
+    protected final boolean ownsDevice;
+    protected int additionalCtxCreationFlags = 0;
+    protected volatile boolean sendReshape = false; // volatile: maybe written by WindowManager thread w/o locking
+    protected volatile boolean sendDestroy = false; // volatile: maybe written by WindowManager thread w/o locking
+
+    /**
+     * <p>
+     * The {@link GLContext} can be assigned later manually via {@link GLAutoDrawable#setContext(GLContext, boolean) setContext(ctx)}
+     * <i>or</i> it will be created <i>lazily</i> at the 1st {@link GLAutoDrawable#display() display()} method call.<br>
+     * <i>Lazy</i> {@link GLContext} creation will take a shared {@link GLContext} into account
+     * which has been set {@link #setSharedContext(GLContext) directly}
+     * or {@link #setSharedAutoDrawable(GLAutoDrawable) via another GLAutoDrawable}.
+     * </p>
+     * @param drawable upstream {@link GLDrawableImpl} instance,
+     *                 may be <code>null</code> for lazy initialization
+     * @param context upstream {@link GLContextImpl} instance,
+     *                may not have been made current (created) yet,
+     *                may not be associated w/ <code>drawable<code> yet,
+     *                may be <code>null</code> for lazy initialization at 1st {@link #display()}.
+     * @param ownsDevice pass <code>true</code> if {@link AbstractGraphicsDevice#close()} shall be issued,
+     *                   otherwise pass <code>false</code>. Closing the device is required in case
+     *                   the drawable is created w/ it's own new instance, e.g. offscreen drawables,
+     *                   and no further lifecycle handling is applied.
+     */
+    public GLAutoDrawableBase(GLDrawableImpl drawable, GLContextImpl context, boolean ownsDevice) {
+        this.drawable = drawable;
+        this.context = context;
+        this.preserveGLELSAtDestroy = false;
+        this.glels = null;
+        this.glStateKeeperListener = null;
+        this.ownsDevice = ownsDevice;
+        if(null != context && null != drawable) {
+            context.setGLDrawable(drawable, false);
+        }
+        resetFPSCounter();
+    }
+
+    @Override
+    public final void setSharedContext(GLContext sharedContext) throws IllegalStateException {
+        helper.setSharedContext(this.context, sharedContext);
+    }
+
+    @Override
+    public final void setSharedAutoDrawable(GLAutoDrawable sharedAutoDrawable) throws IllegalStateException {
+        helper.setSharedAutoDrawable(this, sharedAutoDrawable);
+    }
+
+    /** Returns the recursive lock object of the upstream implementation, which synchronizes multithreaded access on top of {@link NativeSurface#lockSurface()}. */
+    protected abstract RecursiveLock getLock();
+
+    @Override
+    public final GLStateKeeper.Listener setGLStateKeeperListener(Listener l) {
+        final GLStateKeeper.Listener pre = glStateKeeperListener;
+        glStateKeeperListener = l;
+        return pre;
+    }
+
+    @Override
+    public final boolean preserveGLStateAtDestroy(boolean value) {
+        final boolean res = isGLStatePreservationSupported() ? true : false;
+        if( res ) {
+            if( DEBUG ) {
+                final long surfaceHandle = null != getNativeSurface() ? getNativeSurface().getSurfaceHandle() : 0;
+                System.err.println("GLAutoDrawableBase.setPreserveGLStateAtDestroy: ("+getThreadName()+"): "+preserveGLELSAtDestroy+" -> "+value+" - surfaceHandle 0x"+Long.toHexString(surfaceHandle));
+            }
+            preserveGLELSAtDestroy = value;
+        }
+        return res;
+    }
+
+    @Override
+    public boolean isGLStatePreservationSupported() { return false; }
+
+    @Override
+    public final GLEventListenerState getPreservedGLState() {
+        return glels;
+    }
+
+    @Override
+    public final GLEventListenerState clearPreservedGLState() {
+        final GLEventListenerState r = glels;
+        glels = null;
+        return r;
+    }
+
+    /**
+     * Preserves the {@link GLEventListenerState} from this {@link GLAutoDrawable}.
+     *
+     * @return <code>true</code> if the {@link GLEventListenerState} is preserved successfully from this {@link GLAutoDrawable},
+     *         otherwise <code>false</code>.
+     *
+     * @throws IllegalStateException if the {@link GLEventListenerState} is already preserved
+     *
+     * @see #restoreGLEventListenerState()
+     */
+    protected final boolean preserveGLEventListenerState() throws IllegalStateException {
+        if( null != glels ) {
+            throw new IllegalStateException("GLEventListenerState already pulled");
+        }
+        if( null != context && context.isCreated() ) {
+            if( null!= glStateKeeperListener) {
+                glStateKeeperListener.glStatePreserveNotify(this);
+            }
+            glels = GLEventListenerState.moveFrom(this);
+            return null != glels;
+        }
+        return false;
+    }
+
+    /**
+     * Restores a previously {@link #preserveGLEventListenerState() preserved} {@link GLEventListenerState} to this {@link GLAutoDrawable}.
+     *
+     * @return <code>true</code> if the {@link GLEventListenerState} was previously {@link #preserveGLEventListenerState() preserved}
+     *         and is moved successfully to this {@link GLAutoDrawable},
+     *         otherwise <code>false</code>.
+     *
+     * @see #preserveGLEventListenerState()
+     */
+    protected final boolean restoreGLEventListenerState() {
+        if( null != glels ) {
+            glels.moveTo(this);
+            glels = null;
+            if( null!= glStateKeeperListener) {
+                glStateKeeperListener.glStateRestored(this);
+            }
+            return true;
+        }
+        return false;
+    }
+
+    /** Default implementation to handle repaint events from the windowing system */
+    protected final void defaultWindowRepaintOp() {
+        final GLDrawable _drawable = drawable;
+        if( null != _drawable && _drawable.isRealized() ) {
+            if( !_drawable.getNativeSurface().isSurfaceLockedByOtherThread() && !helper.isAnimatorAnimatingOnOtherThread() ) {
+                display();
+            }
+        }
+    }
+
+    /** Default implementation to handle resize events from the windowing system. All required locks are being claimed. */
+    protected final void defaultWindowResizedOp(int newWidth, int newHeight) throws NativeWindowException, GLException {
+        GLDrawableImpl _drawable = drawable;
+        if( null!=_drawable ) {
+            if(DEBUG) {
+                final long surfaceHandle = null != getNativeSurface() ? getNativeSurface().getSurfaceHandle() : 0;
+                System.err.println("GLAutoDrawableBase.sizeChanged: ("+getThreadName()+"): "+newWidth+"x"+newHeight+" - surfaceHandle 0x"+Long.toHexString(surfaceHandle));
+            }
+            if( ! _drawable.getChosenGLCapabilities().isOnscreen() ) {
+                final RecursiveLock _lock = getLock();
+                _lock.lock();
+                try {
+                    final GLDrawableImpl _drawableNew = GLDrawableHelper.resizeOffscreenDrawable(_drawable, context, newWidth, newHeight);
+                    if(_drawable != _drawableNew) {
+                        // write back
+                        _drawable = _drawableNew;
+                        drawable = _drawableNew;
+                    }
+                } finally {
+                    _lock.unlock();
+                }
+            }
+            sendReshape = true; // async if display() doesn't get called below, but avoiding deadlock
+            if( _drawable.isRealized() ) {
+                if( !_drawable.getNativeSurface().isSurfaceLockedByOtherThread() && !helper.isAnimatorAnimatingOnOtherThread() ) {
+                    display();
+                }
+            }
+        }
+    }
+
+    /**
+     * Default implementation to handle destroy notifications from the windowing system.
+     *
+     * <p>
+     * If the {@link NativeSurface} does not implement {@link WindowClosingProtocol}
+     * or {@link WindowClosingMode#DISPOSE_ON_CLOSE} is enabled (default),
+     * a thread safe destruction is being induced.
+     * </p>
+     */
+    protected final void defaultWindowDestroyNotifyOp() {
+        final NativeSurface ns = getNativeSurface();
+        final boolean shallClose;
+        if(ns instanceof WindowClosingProtocol) {
+            shallClose = WindowClosingMode.DISPOSE_ON_CLOSE == ((WindowClosingProtocol)ns).getDefaultCloseOperation();
+        } else {
+            shallClose = true;
+        }
+        if( shallClose ) {
+            destroyAvoidAwareOfLocking();
+        }
+    }
+
+    /**
+     * Calls {@link #destroy()}
+     * directly if the following requirements are met:
+     * <ul>
+     *   <li>An {@link GLAnimatorControl} is bound (see {@link #getAnimator()}) and running on another thread.
+     *       Here we pause the animation while issuing the destruction.</li>
+     *   <li>Surface is not locked by another thread (considered anonymous).</li>
+     * </ul>
+     * <p>
+     * Otherwise destroy is being flagged to be called within the next
+     * call of display().
+     * </p>
+     * <p>
+     * This method is being used to avoid deadlock if
+     * destruction is desired by <i>other</i> threads, e.g. the window manager.
+     * </p>
+     * @see #defaultWindowDestroyNotifyOp()
+     * @see #defaultDisplay()
+     */
+    protected final void destroyAvoidAwareOfLocking() {
+        final NativeSurface ns = getNativeSurface();
+
+        final GLAnimatorControl ctrl = helper.getAnimator();
+
+        // Is an animator thread perform rendering?
+        if ( helper.isAnimatorStartedOnOtherThread() ) {
+            // Pause animations before initiating safe destroy.
+            final boolean isPaused = ctrl.pause();
+            destroy();
+            if(isPaused) {
+                ctrl.resume();
+            }
+        } else if (null != ns && ns.isSurfaceLockedByOtherThread()) {
+            // Surface is locked by another thread.
+            // Flag that destroy should be performed on the next
+            // attempt to display.
+            sendDestroy = true; // async, but avoiding deadlock
+        } else {
+            // Without an external thread animating or locking the
+            // surface, we are safe.
+            destroy();
+        }
+    }
+
+    /**
+     * Calls {@link #destroyImplInLock()} while claiming the lock.
+     */
+    protected final void defaultDestroy() {
+        final RecursiveLock lock = getLock();
+        lock.lock();
+        try {
+            destroyImplInLock();
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    /**
+     * Default implementation to destroys the drawable and context of this GLAutoDrawable:
+     * <ul>
+     *   <li>issues the GLEventListener dispose call, if drawable and context are valid</li>
+     *   <li>destroys the GLContext, if valid</li>
+     *   <li>destroys the GLDrawable, if valid</li>
+     * </ul>
+     * <p>Method assumes the lock is being hold.</p>
+     * <p>Override it to extend it to destroy your resources, i.e. the actual window.
+     * In such case call <code>super.destroyImplInLock</code> first.</p>
+     */
+    protected void destroyImplInLock() {
+        if( preserveGLELSAtDestroy ) {
+            preserveGLStateAtDestroy(false);
+            preserveGLEventListenerState();
+        }
+        if( null != context ) {
+            if( context.isCreated() ) {
+                // Catch dispose GLExceptions by GLEventListener, just 'print' them
+                // so we can continue with the destruction.
+                try {
+                    helper.disposeGL(this, context, true);
+                } catch (GLException gle) {
+                    gle.printStackTrace();
+                }
+            }
+            context = null;
+        }
+        if( null != drawable ) {
+            final AbstractGraphicsDevice device = drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice();
+            drawable.setRealized(false);
+            drawable = null;
+            if( ownsDevice ) {
+                device.close();
+            }
+        }
+    }
+
+    public final void defaultSwapBuffers() throws GLException {
+        final RecursiveLock _lock = getLock();
+        _lock.lock();
+        try {
+            if(null != drawable) {
+                drawable.swapBuffers();
+            }
+        } finally {
+            _lock.unlock();
+        }
+    }
+
+    //
+    // GLAutoDrawable
+    //
+
+    protected final Runnable defaultInitAction = new Runnable() {
+        @Override
+        public final void run() {
+            // Lock: Locked Surface/Window by MakeCurrent/Release
+            helper.init(GLAutoDrawableBase.this, !sendReshape);
+            resetFPSCounter();
+        } };
+
+    protected final Runnable defaultDisplayAction = new Runnable() {
+        @Override
+        public final void run() {
+            // Lock: Locked Surface/Window by display _and_ MakeCurrent/Release
+            if (sendReshape) {
+                helper.reshape(GLAutoDrawableBase.this, 0, 0, getWidth(), getHeight());
+                sendReshape = false;
+            }
+            helper.display(GLAutoDrawableBase.this);
+            fpsCounter.tickFPS();
+        } };
+
+    protected final void defaultDisplay() {
+        if( sendDestroy ) {
+            sendDestroy=false;
+            destroy();
+            return;
+        }
+        final RecursiveLock _lock = getLock();
+        _lock.lock();
+        try {
+            if( null == context ) {
+                boolean contextCreated = false;
+                final GLDrawableImpl _drawable = drawable;
+                if ( null != _drawable && _drawable.isRealized() && 0<_drawable.getWidth()*_drawable.getHeight() ) {
+                    final GLContext[] shareWith = { null };
+                    if( !helper.isSharedGLContextPending(shareWith) ) {
+                        if( !restoreGLEventListenerState() ) {
+                            context = (GLContextImpl) _drawable.createContext(shareWith[0]);
+                            context.setContextCreationFlags(additionalCtxCreationFlags);
+                            contextCreated = true;
+                            // surface is locked/unlocked implicit by context's makeCurrent/release
+                            helper.invokeGL(_drawable, context, defaultDisplayAction, defaultInitAction);
+                        }
+                    }
+                }
+                if(DEBUG) {
+                    System.err.println("GLAutoDrawableBase.defaultDisplay: contextCreated "+contextCreated);
+                }
+            } else {
+                // surface is locked/unlocked implicit by context's makeCurrent/release
+                helper.invokeGL(drawable, context, defaultDisplayAction, defaultInitAction);
+            }
+        } finally {
+            _lock.unlock();
+        }
+    }
+
+    protected final GLEventListener defaultDisposeGLEventListener(GLEventListener listener, boolean remove) {
+        final RecursiveLock _lock = getLock();
+        _lock.lock();
+        try {
+            return helper.disposeGLEventListener(GLAutoDrawableBase.this, drawable, context, listener, remove);
+        } finally {
+            _lock.unlock();
+        }
+    }
+
+    @Override
+    public final GLDrawable getDelegatedDrawable() {
+        return drawable;
+    }
+
+    @Override
+    public final GLContext getContext() {
+        return context;
+    }
+
+    @Override
+    public final GLContext setContext(GLContext newCtx, boolean destroyPrevCtx) {
+        final RecursiveLock lock = getLock();
+        lock.lock();
+        try {
+            final GLContext oldCtx = context;
+            GLDrawableHelper.switchContext(drawable, oldCtx, destroyPrevCtx, newCtx, additionalCtxCreationFlags);
+            context=(GLContextImpl)newCtx;
+            return oldCtx;
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    @Override
+    public final GL getGL() {
+        final GLContext _context = context;
+        if (_context == null) {
+            return null;
+        }
+        return _context.getGL();
+    }
+
+    @Override
+    public final GL setGL(GL gl) {
+        final GLContext _context = context;
+        if (_context != null) {
+            _context.setGL(gl);
+            return gl;
+        }
+        return null;
+    }
+
+    @Override
+    public final void addGLEventListener(GLEventListener listener) {
+        helper.addGLEventListener(listener);
+    }
+
+    @Override
+    public final void addGLEventListener(int index, GLEventListener listener) throws IndexOutOfBoundsException {
+        helper.addGLEventListener(index, listener);
+    }
+
+    @Override
+    public int getGLEventListenerCount() {
+        return helper.getGLEventListenerCount();
+    }
+
+    @Override
+    public GLEventListener getGLEventListener(int index) throws IndexOutOfBoundsException {
+        return helper.getGLEventListener(index);
+    }
+
+    @Override
+    public boolean areAllGLEventListenerInitialized() {
+        return helper.areAllGLEventListenerInitialized();
+    }
+
+    @Override
+    public boolean getGLEventListenerInitState(GLEventListener listener) {
+        return helper.getGLEventListenerInitState(listener);
+    }
+
+    @Override
+    public void setGLEventListenerInitState(GLEventListener listener, boolean initialized) {
+        helper.setGLEventListenerInitState(listener, initialized);
+    }
+
+    @Override
+    public GLEventListener disposeGLEventListener(GLEventListener listener, boolean remove) {
+        return defaultDisposeGLEventListener(listener, remove);
+    }
+
+    @Override
+    public final GLEventListener removeGLEventListener(GLEventListener listener) {
+        return helper.removeGLEventListener(listener);
+    }
+
+    @Override
+    public final void setAnimator(GLAnimatorControl animatorControl)
+            throws GLException {
+        helper.setAnimator(animatorControl);
+    }
+
+    @Override
+    public final GLAnimatorControl getAnimator() {
+        return helper.getAnimator();
+    }
+
+    @Override
+    public final Thread setExclusiveContextThread(Thread t) throws GLException {
+        return helper.setExclusiveContextThread(t, context);
+    }
+
+    @Override
+    public final Thread getExclusiveContextThread() {
+        return helper.getExclusiveContextThread();
+    }
+
+    @Override
+    public final boolean invoke(boolean wait, GLRunnable glRunnable) {
+        return helper.invoke(this, wait, glRunnable);
+    }
+
+    @Override
+    public boolean invoke(final boolean wait, final List<GLRunnable> glRunnables) {
+        return helper.invoke(this, wait, glRunnables);
+    }
+
+    @Override
+    public final void setAutoSwapBufferMode(boolean enable) {
+        helper.setAutoSwapBufferMode(enable);
+    }
+
+    @Override
+    public final boolean getAutoSwapBufferMode() {
+        return helper.getAutoSwapBufferMode();
+    }
+
+    @Override
+    public final void setContextCreationFlags(int flags) {
+        additionalCtxCreationFlags = flags;
+        final GLContext _context = context;
+        if(null != _context) {
+            _context.setContextCreationFlags(additionalCtxCreationFlags);
+        }
+    }
+
+    @Override
+    public final int getContextCreationFlags() {
+        return additionalCtxCreationFlags;
+    }
+
+    //
+    // FPSCounter
+    //
+
+    @Override
+    public final void setUpdateFPSFrames(int frames, PrintStream out) {
+        fpsCounter.setUpdateFPSFrames(frames, out);
+    }
+
+    @Override
+    public final void resetFPSCounter() {
+        fpsCounter.resetFPSCounter();
+    }
+
+    @Override
+    public final int getUpdateFPSFrames() {
+        return fpsCounter.getUpdateFPSFrames();
+    }
+
+    @Override
+    public final long getFPSStartTime()   {
+        return fpsCounter.getFPSStartTime();
+    }
+
+    @Override
+    public final long getLastFPSUpdateTime() {
+        return fpsCounter.getLastFPSUpdateTime();
+    }
+
+    @Override
+    public final long getLastFPSPeriod() {
+        return fpsCounter.getLastFPSPeriod();
+    }
+
+    @Override
+    public final float getLastFPS() {
+        return fpsCounter.getLastFPS();
+    }
+
+    @Override
+    public final int getTotalFPSFrames() {
+        return fpsCounter.getTotalFPSFrames();
+    }
+
+    @Override
+    public final long getTotalFPSDuration() {
+        return fpsCounter.getTotalFPSDuration();
+    }
+
+    @Override
+    public final float getTotalFPS() {
+        return fpsCounter.getTotalFPS();
+    }
+
+    //
+    // GLDrawable delegation
+    //
+
+    @Override
+    public final GLContext createContext(final GLContext shareWith) {
+        final RecursiveLock lock = getLock();
+        lock.lock();
+        try {
+            if(drawable != null) {
+                final GLContext _ctx = drawable.createContext(shareWith);
+                _ctx.setContextCreationFlags(additionalCtxCreationFlags);
+                return _ctx;
+            }
+            return null;
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    @Override
+    public final void setRealized(boolean realized) {
+        final RecursiveLock _lock = getLock();
+        _lock.lock();
+        try {
+            final GLDrawable _drawable = drawable;
+            if( null == _drawable || realized && ( 0 >= _drawable.getWidth() || 0 >= _drawable.getHeight() ) ) {
+                return;
+            }
+            _drawable.setRealized(realized);
+            if( realized && _drawable.isRealized() ) {
+                sendReshape=true; // ensure a reshape is being send ..
+            }
+        } finally {
+            _lock.unlock();
+        }
+    }
+
+    @Override
+    public final boolean isRealized() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.isRealized() : false;
+    }
+
+    @Override
+    public int getWidth() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getWidth() : 0;
+    }
+
+    @Override
+    public int getHeight() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getHeight() : 0;
+    }
+
+    @Override
+    public boolean isGLOriented() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.isGLOriented() : true;
+    }
+
+    @Override
+    public final GLCapabilitiesImmutable getChosenGLCapabilities() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getChosenGLCapabilities() : null;
+    }
+
+    @Override
+    public final GLProfile getGLProfile() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getGLProfile() : null;
+    }
+
+    @Override
+    public final NativeSurface getNativeSurface() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getNativeSurface() : null;
+    }
+
+    @Override
+    public final long getHandle() {
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getHandle() : 0;
+    }
+
+    protected static String getThreadName() { return Thread.currentThread().getName(); }
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName()+"[ \n\tHelper: " + helper + ", \n\tDrawable: " + drawable +
+               ", \n\tContext: " + context + /** ", \n\tWindow: "+window+ ", \n\tFactory: "+factory+ */ "]";
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/GLBufferObjectTracker.java b/src/jogl/classes/jogamp/opengl/GLBufferObjectTracker.java
new file mode 100644
index 000000000..472bfbd58
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLBufferObjectTracker.java
@@ -0,0 +1,520 @@
+/**
+ * Copyright 2014 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl;
+
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
+
+import javax.media.opengl.*;
+
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.util.IntObjectHashMap;
+
+/**
+ * Tracking of {@link GLBufferStorage} instances via GL API callbacks.
+ * <p>
+ * See {@link GLBufferStorage} for generic details.
+ * </p>
+ * <p>
+ * Buffer storage is created via
+ * <ul>
+ *   <li><code>glBufferStorage</code> - storage creation with target via {@link #createBufferStorage(GLBufferStateTracker, GL, int, long, Buffer, int, int, CreateStorageDispatch, long)}</li>
+ *   <li>{@link GL#glBufferData(int, long, java.nio.Buffer, int)} - storage recreation with target via {@link #createBufferStorage(GLBufferStateTracker, GL, int, long, Buffer, int, int, CreateStorageDispatch, long)}</li>
+ *   <li>{@link GL2#glNamedBufferDataEXT(int, long, java.nio.Buffer, int)} - storage recreation, direct, via {@link #createBufferStorage(GL, int, long, Buffer, int, CreateStorageDispatch, long)}</li>
+ * </ul>
+ * Note that storage <i>recreation</i> as mentioned above also invalidate a previous storage instance,
+ * i.e. disposed the buffer's current storage if exist and attaches a new storage instance.
+ * </p>
+ * <p>
+ * Buffers storage is disposed via
+ * <ul>
+ *   <li>{@link GL#glDeleteBuffers(int, IntBuffer)} - explicit, direct, via {@link #notifyBuffersDeleted(int, IntBuffer)} or {@link #notifyBuffersDeleted(int, int[], int)}</li>
+ *   <li>{@link GL#glBufferData(int, long, java.nio.Buffer, int)} - storage recreation via target</li>
+ *   <li>{@link GL2#glNamedBufferDataEXT(int, long, java.nio.Buffer, int)} - storage recreation, direct</li>
+ * </ul>
+ * </p>
+ *
+ * <p>
+ * Implementation throws a {@link GLException} in all <i>construction</i> methods as listed below,
+ * if GL-function constraints are not met. <code>createBufferStorage</code> also throws an exception
+ * if the native GL-function fails.
+ * <ul>
+ *   <li>{@link #createBufferStorage(GLBufferStateTracker, GL, int, long, Buffer, int, int, CreateStorageDispatch, long)}, etc ..</li>
+ *   <li>{@link #mapBuffer(GLBufferStateTracker, GL, int, int, MapBufferAllDispatch, long)}, etc ..</li>
+ * </ul>
+ * In <i>destruction</i> and informal methods, i.e. all others, implementation only issues a WARNING debug message, if enabled.
+ * </p>
+ *
+ * <p>
+ * Buffer mapping methods like {@link GL#mapBuffer(int, int)} ...,
+ * require knowledge of the buffer's storage size as determined via it's creation with
+ * {@link GL#glBufferData(int, long, java.nio.Buffer, int)} ....
+ * </p>
+ * <p>
+ * Hence we track the OpenGL buffer's {@link GLBufferStorage} to be able to
+ * access the buffer's storage size. The tracked {@link GLBufferStorage} instances
+ * also allow users to conveniently access details of their created and maybe mapped buffer storage.
+ * </p>
+ * <p>
+ * The {@link GLBufferObjectTracker} and it's tracked {@link GLBufferStorage} instances
+ * maybe shared across multiple OpenGL context, hence this class is thread safe and employs synchronization.
+ * </p>
+ * <p>
+ * Implementation requires and utilizes a local {@link GLBufferStateTracker}
+ * to resolve the actual buffer-name bound to the given target.
+ * </p>
+ * <p>
+ * Note: This tracker requires to be notified about all OpenGL buffer storage operations,
+ * as well as the local {@link GLBufferStateTracker} to be notified about all
+ * OpenGL buffer binding operations.
+ * Hence buffer storage cannot be accessed properly if managed via native code.
+ * </p>
+ */
+public class GLBufferObjectTracker {
+    protected static final boolean DEBUG;
+
+    static {
+        Debug.initSingleton();
+        DEBUG = Debug.isPropertyDefined("jogl.debug.GLBufferObjectTracker", true);
+    }
+
+    static final class GLBufferStorageImpl extends GLBufferStorage {
+        GLBufferStorageImpl(final int name, final long size, final int mutableUsage, final int immutableFlags) {
+            super(name, size, mutableUsage, immutableFlags);
+        }
+        final void setMappedBuffer(final ByteBuffer bb) {
+            if (DEBUG) {
+                System.err.printf("%s.GLBufferStorage.setMappedBuffer: %s: %s -> %s%n", msgClazzName, toString(true), mappedBuffer, bb);
+            }
+            mappedBuffer = bb;
+        }
+    }
+
+    /**
+     * Map from buffer names to GLBufferObject.
+     */
+    private final IntObjectHashMap bufferName2StorageMap;
+
+    public GLBufferObjectTracker() {
+        bufferName2StorageMap = new IntObjectHashMap();
+        bufferName2StorageMap.setKeyNotFoundValue(null);
+    }
+
+    public static interface CreateStorageDispatch {
+        void create(final int targetOrBufferName, final long size, final Buffer data, final int mutableUsageOrImmutableFlags, final long glProcAddress);
+    }
+
+    /**
+     * Must be called when [re]creating the GL buffer object via <code>glBufferStorage</code> and {@link GL#glBufferData(int, long, java.nio.Buffer, int)},
+     * i.e. implies destruction of the buffer.
+     *
+     * @param bufferStateTracker
+     * @param caller
+     * @param target
+     * @param size
+     * @param mutableUsage <code>glBufferData</code>, <code>glNamedBufferDataEXT</code> usage
+     * @param immutableFlags <code>glBufferStorage</code> flags
+     * @throws GLException if buffer is not bound to target
+     * @throws GLException if size is less-or-eqaul zero for <code>glBufferStorage</code>, or size is less-than zero otherwise
+     * @throws GLException if a native GL-Error occurs
+     */
+    public synchronized final void createBufferStorage(final GLBufferStateTracker bufferStateTracker, final GL caller,
+                                                       final int target, final long size, final Buffer data, int mutableUsage, int immutableFlags,
+                                                       final CreateStorageDispatch dispatch, final long glProcAddress) throws GLException {
+        final int glerrPre = caller.glGetError(); // clear
+        if (DEBUG && GL.GL_NO_ERROR != glerrPre) {
+            System.err.printf("%s.%s glerr-pre 0x%X%n", msgClazzName, msgCreateBound, glerrPre);
+        }
+        final int bufferName = bufferStateTracker.getBoundBufferObject(target, caller);
+        if ( 0 == bufferName ) {
+            throw new GLException(String.format("%s: Buffer for target 0x%X not bound", GL_INVALID_OPERATION, target));
+        }
+        final boolean mutableBuffer = 0 != mutableUsage;
+        final boolean invalidSize = (  mutableBuffer && 0 > size )   // glBufferData, glNamedBufferDataEXT
+                                 || ( !mutableBuffer && 0 >= size ); // glBufferStorage
+        if( invalidSize ) {
+            throw new GLException(String.format("%s: Invalid size %d for buffer %d on target 0x%X", GL_INVALID_VALUE, size, bufferName, target));
+        }
+
+        dispatch.create(target, size, data, mutableBuffer ? mutableUsage : immutableFlags, glProcAddress);
+        final int glerrPost = caller.glGetError(); // be safe, catch failure!
+        if(GL.GL_NO_ERROR != glerrPost) {
+            throw new GLException(String.format("GL-Error 0x%X while creating %s storage for target 0x%X -> buffer %d of size %d with data %s",
+                    glerrPost, mutableBuffer ? "mutable" : "immutable", target, bufferName, size, data));
+        }
+        final GLBufferStorageImpl objNew = new GLBufferStorageImpl(bufferName, size, mutableUsage, immutableFlags);
+        final GLBufferStorageImpl objOld = (GLBufferStorageImpl) bufferName2StorageMap.put(bufferName, objNew);
+        if (DEBUG) {
+            System.err.printf("%s.%s target: 0x%X -> %d: %s -> %s%n", msgClazzName, msgCreateBound, target, bufferName, objOld, objNew);
+        }
+        if( null != objOld ) {
+            objOld.setMappedBuffer(null);
+        }
+    }
+
+    /**
+     * Must be called when [re]creating the GL buffer object via {@link GL2#glNamedBufferDataEXT(int, long, java.nio.Buffer, int)},
+     * i.e. implies destruction of the buffer.
+     *
+     * @param bufferName
+     * @param size
+     * @param mutableUsage
+     * @throws GLException if size is less-than zero
+     * @throws GLException if a native GL-Error occurs
+     */
+    public synchronized final void createBufferStorage(final GL caller,
+                                                       final int bufferName, final long size, final Buffer data, final int mutableUsage, int immutableFlags,
+                                                       final CreateStorageDispatch dispatch, final long glProcAddress) throws GLException {
+        final int glerrPre = caller.glGetError(); // clear
+        if (DEBUG && GL.GL_NO_ERROR != glerrPre) {
+            System.err.printf("%s.%s glerr-pre 0x%X%n", msgClazzName, msgCreateNamed, glerrPre);
+        }
+        if ( 0 > size ) { // glBufferData, glNamedBufferDataEXT
+            throw new GLException(String.format("%s: Invalid size %d for buffer %d", GL_INVALID_VALUE, size, bufferName));
+        }
+        final boolean mutableBuffer = 0 != mutableUsage;
+        if( !mutableBuffer ) {
+            throw new InternalError("Immutable glNamedBufferStorageEXT not supported yet");
+        }
+        dispatch.create(bufferName, size, data, mutableUsage, glProcAddress);
+        final int glerrPost = caller.glGetError(); // be safe, catch failure!
+        if(GL.GL_NO_ERROR != glerrPost) {
+            throw new GLException(String.format("GL-Error 0x%X while creating %s storage for buffer %d of size %d with data %s",
+                                                glerrPost, "mutable", bufferName, size, data));
+        }
+        final GLBufferStorageImpl objNew = new GLBufferStorageImpl(bufferName, size, mutableUsage, 0 /* immutableFlags */);
+        final GLBufferStorageImpl objOld = (GLBufferStorageImpl) bufferName2StorageMap.put(bufferName, objNew);
+        if (DEBUG) {
+            System.err.printf("%s.%s direct: %d: %s -> %s%n", msgClazzName, msgCreateNamed, bufferName, objOld, objNew);
+        }
+        if( null != objOld ) {
+            objOld.setMappedBuffer(null);
+        }
+    }
+
+    /**
+     * Must be called when deleting GL buffer objects vis <code>glDeleteBuffers</code>.
+     * @param count
+     * @param bufferNames
+     * @param offset
+     */
+    public synchronized final void notifyBuffersDeleted(final int count, final int[] bufferNames, final int offset) {
+        for(int i=0; i<count; i++) {
+            notifyBufferDeleted(bufferNames[i+offset], i, count);
+        }
+    }
+    /**
+     * Must be called when deleting GL buffer objects vis <code>glDeleteBuffers</code>.
+     * @param n
+     * @param bufferNames
+     */
+    public synchronized final void notifyBuffersDeleted(final int n, final IntBuffer bufferNames) {
+        final int offset = bufferNames.position();
+        for(int i=0; i<n; i++) {
+            notifyBufferDeleted(bufferNames.get(i+offset), i, n);
+        }
+    }
+    /**
+     * Must be called when deleting GL buffer objects vis {@link GL#glDeleteBuffers(int, IntBuffer)}.
+     * @param bufferName
+     * @param i
+     * @param count
+     */
+    private synchronized final void notifyBufferDeleted(final int bufferName, final int i, final int count) {
+        final GLBufferStorageImpl objOld = (GLBufferStorageImpl) bufferName2StorageMap.put(bufferName, null);
+        if (DEBUG) {
+            System.err.printf("%s.notifyBuffersDeleted()[%d/%d]: %d: %s -> null%n", msgClazzName, i+1, count, bufferName, objOld);
+        }
+        if( null == objOld ) {
+            if (DEBUG) {
+                System.err.printf("%s: %s.notifyBuffersDeleted()[%d/%d]: Buffer %d not tracked%n", warning, msgClazzName, i+1, count, bufferName);
+                Thread.dumpStack();
+            }
+            return;
+        }
+        objOld.setMappedBuffer(null);
+    }
+
+    public static interface MapBufferDispatch {
+        ByteBuffer allocNioByteBuffer(final long addr, final long length);
+    }
+    public static interface MapBufferRangeDispatch extends MapBufferDispatch {
+        long mapBuffer(final int targetOrBufferName, final long offset, final long length, final int access, final long glProcAddress);
+    }
+    public static interface MapBufferAllDispatch extends MapBufferDispatch {
+        long mapBuffer(final int targetOrBufferName, final int access, final long glProcAddress);
+    }
+
+    private static final String GL_INVALID_OPERATION = "GL_INVALID_OPERATION";
+    private static final String GL_INVALID_VALUE = "GL_INVALID_VALUE";
+
+    /**
+     * Must be called when mapping GL buffer objects via {@link GL#mapBuffer(int, int)}.
+     * @throws GLException if buffer is not bound to target
+     * @throws GLException if buffer is not tracked
+     * @throws GLException if buffer is already mapped
+     * @throws GLException if buffer has invalid store size, i.e. less-than zero
+     */
+    public synchronized final GLBufferStorage mapBuffer(final GLBufferStateTracker bufferStateTracker,
+                                                        final GL caller, final int target, final int access,
+                                                        final MapBufferAllDispatch dispatch, final long glProcAddress) throws GLException {
+        return this.mapBufferImpl(bufferStateTracker, caller, target, false /* useRange */, 0 /* offset */, 0 /* length */, access, dispatch, glProcAddress);
+    }
+    /**
+     * Must be called when mapping GL buffer objects via {@link GL#mapBufferRange(int, long, long, int)}.
+     * @throws GLException if buffer is not bound to target
+     * @throws GLException if buffer is not tracked
+     * @throws GLException if buffer is already mapped
+     * @throws GLException if buffer has invalid store size, i.e. less-than zero
+     * @throws GLException if buffer mapping range does not fit, incl. offset
+     */
+    public synchronized final GLBufferStorage mapBuffer(final GLBufferStateTracker bufferStateTracker,
+                                                        final GL caller, final int target, final long offset, final long length, final int access,
+                                                        final MapBufferRangeDispatch dispatch, final long glProcAddress) throws GLException {
+        return this.mapBufferImpl(bufferStateTracker, caller, target, true /* useRange */, length, access, access, dispatch, glProcAddress);
+    }
+    /**
+     * Must be called when mapping GL buffer objects via {@link GL2#mapNamedBuffer(int, int)}.
+     * @throws GLException if buffer is not tracked
+     * @throws GLException if buffer is already mapped
+     * @throws GLException if buffer has invalid store size, i.e. less-than zero
+     */
+    public synchronized final GLBufferStorage mapBuffer(final int bufferName, final int access, final MapBufferAllDispatch dispatch,
+                                                        final long glProcAddress) throws GLException {
+        return this.mapBufferImpl(0 /* target */, bufferName, true /* isNamedBuffer */, false /* useRange */, 0 /* offset */, 0 /* length */, access, dispatch, glProcAddress);
+    }
+    /**
+     * Must be called when mapping GL buffer objects via {@link GL2#mapNamedBufferRange(int, long, long, int)}.
+     * @throws GLException if buffer is not tracked
+     * @throws GLException if buffer is already mapped
+     * @throws GLException if buffer has invalid store size, i.e. less-than zero
+     * @throws GLException if buffer mapping range does not fit, incl. offset
+     */
+    public synchronized final GLBufferStorage mapBuffer(final int bufferName, final long offset, final long length, final int access, final MapBufferRangeDispatch dispatch,
+                                                        final long glProcAddress) throws GLException {
+        return this.mapBufferImpl(0 /* target */, bufferName, true /* isNamedBuffer */, false /* useRange */, 0 /* offset */, 0 /* length */, access, dispatch, glProcAddress);
+    }
+    /**
+     * @throws GLException if buffer is not bound to target
+     * @throws GLException if buffer is not tracked
+     * @throws GLException if buffer is already mapped
+     * @throws GLException if buffer has invalid store size, i.e. less-than zero
+     * @throws GLException if buffer mapping range does not fit, incl. optional offset
+     */
+    private synchronized final GLBufferStorage mapBufferImpl(final GLBufferStateTracker bufferStateTracker,
+                                                             final GL caller, final int target, final boolean useRange,
+                                                             long offset, long length, final int access,
+                                                             final MapBufferDispatch dispatch, final long glProcAddress) throws GLException {
+        final int bufferName = bufferStateTracker.getBoundBufferObject(target, caller);
+        if( 0 == bufferName ) {
+            throw new GLException(String.format("%s.%s: %s Buffer for target 0x%X not bound", msgClazzName, msgMapBuffer, GL_INVALID_OPERATION, target));
+        }
+        return this.mapBufferImpl(target, bufferName, false /* isNamedBuffer */, useRange, offset, length, access, dispatch, glProcAddress);
+    }
+    /**
+     * <p>
+     * A zero store size will avoid a native call and returns the unmapped {@link GLBufferStorage}.
+     * </p>
+     * <p>
+     * A null native mapping result indicating an error will
+     * not cause a GLException but returns the unmapped {@link GLBufferStorage}.
+     * This allows the user to handle this case.
+     * </p>
+     * @throws GLException if buffer is not tracked
+     * @throws GLException if buffer is already mapped
+     * @throws GLException if buffer has invalid store size, i.e. less-than zero
+     * @throws GLException if buffer mapping range does not fit, incl. optional offset
+     */
+    private synchronized final GLBufferStorage mapBufferImpl(final int target, final int bufferName, final boolean isNamedBuffer, final boolean useRange, long offset,
+                                                             long length, final int access, final MapBufferDispatch dispatch,
+                                                             final long glProcAddress) throws GLException {
+        final GLBufferStorageImpl store = (GLBufferStorageImpl)bufferName2StorageMap.get(bufferName);
+        if ( null == store ) {
+            throw new GLException("Buffer with name "+bufferName+" not tracked");
+        }
+        if( null != store.getMappedBuffer() ) {
+            throw new GLException(String.format("%s.%s: %s Buffer storage of target 0x%X -> %d: %s is already mapped", msgClazzName, msgMapBuffer, GL_INVALID_OPERATION, target, bufferName, store));
+        }
+        final long storeSize = store.getSize();
+        if ( 0 > storeSize ) {
+            throw new GLException(String.format("%s.%s: %s Buffer storage of target 0x%X -> %d: %s is of less-than zero", msgClazzName, msgMapBuffer, GL_INVALID_OPERATION, target, bufferName, store));
+        }
+        if( !useRange ) {
+            length = storeSize;
+            offset = 0;
+        }
+        if( length + offset > storeSize ) {
+            throw new GLException(String.format("%s.%s: %s Out of range: offset %d, length %d, buffer storage of target 0x%X -> %d: %s", msgClazzName, msgMapBuffer, GL_INVALID_VALUE, offset, length, target, bufferName, store));
+        }
+        if( 0 >= length || 0 > offset ) {
+            throw new GLException(String.format("%s.%s: %s Invalid values: offset %d, length %d, buffer storage of target 0x%X -> %d: %s", msgClazzName, msgMapBuffer, GL_INVALID_VALUE, offset, length, target, bufferName, store));
+        }
+        if( 0 == storeSize ) {
+            return store;
+        }
+        final long addr;
+        if( isNamedBuffer ) {
+            if( useRange ) {
+                addr = ((MapBufferRangeDispatch)dispatch).mapBuffer(bufferName, offset, length, access, glProcAddress);
+            } else {
+                addr = ((MapBufferAllDispatch)dispatch).mapBuffer(bufferName, access, glProcAddress);
+            }
+        } else {
+            if( useRange ) {
+                addr = ((MapBufferRangeDispatch)dispatch).mapBuffer(target, offset, length, access, glProcAddress);
+            } else {
+                addr = ((MapBufferAllDispatch)dispatch).mapBuffer(target, access, glProcAddress);
+            }
+        }
+        // GL's map-buffer implementation always returns NULL on error,
+        // user shall validate the result and the corresponding getGLError() value!
+        if ( 0 == addr ) {
+            if( DEBUG ) {
+                System.err.printf("%s.%s: %s MapBuffer null result for target 0x%X -> %d: %s, off %d, len %d, acc 0x%X%n", msgClazzName, msgMapBuffer, warning, target, bufferName, store, offset, length, access);
+                Thread.dumpStack();
+            }
+            // User shall handle the glError !
+        } else {
+            final ByteBuffer buffer = dispatch.allocNioByteBuffer(addr, length);
+            Buffers.nativeOrder(buffer);
+            if( DEBUG ) {
+                System.err.printf("%s.%s: Target 0x%X -> %d: %s, off %d, len %d, acc 0x%X%n", msgClazzName, msgClazzName, target, bufferName, store.toString(false), offset, length, access);
+            }
+            store.setMappedBuffer(buffer);
+        }
+        return store;
+    }
+
+    public static interface UnmapBufferDispatch {
+        boolean unmap(final int targetOrBufferName, final long glProcAddress);
+    }
+
+    /**
+     * Must be called when unmapping GL buffer objects via {@link GL#glUnmapBuffer(int)}.
+     * <p>
+     * Only clear mapped buffer reference of {@link GLBufferStorage}
+     * if native unmapping was successful.
+     * </p>
+     */
+    public synchronized final boolean unmapBuffer(final GLBufferStateTracker bufferStateTracker, final GL caller,
+                                                  final int target,
+                                                  final UnmapBufferDispatch dispatch, final long glProcAddress) {
+        final int bufferName = bufferStateTracker.getBoundBufferObject(target, caller);
+        final GLBufferStorageImpl store;
+        if( 0 == bufferName ) {
+            if (DEBUG) {
+                System.err.printf("%s: %s.%s: Buffer for target 0x%X not bound%n", warning, msgClazzName, msgUnmapped, target);
+                Thread.dumpStack();
+            }
+            store = null;
+        } else {
+            store = (GLBufferStorageImpl) bufferName2StorageMap.get(bufferName);
+            if( DEBUG && null == store ) {
+                System.err.printf("%s: %s.%s: Buffer %d not tracked%n", warning, msgClazzName, msgUnmapped, bufferName);
+                Thread.dumpStack();
+            }
+        }
+        final boolean res = dispatch.unmap(target, glProcAddress);
+        if( res && null != store ) {
+            store.setMappedBuffer(null);
+        }
+        if( DEBUG ) {
+            System.err.printf("%s.%s %s target: 0x%X -> %d: %s%n", msgClazzName, msgUnmapped, res ? "OK" : "Failed", target, bufferName, store.toString(false));
+            if(!res) {
+                Thread.dumpStack();
+            }
+        }
+        return res;
+    }
+    /**
+     * Must be called when unmapping GL buffer objects via {@link GL2#glUnmapNamedBufferEXT(int)}.
+     * <p>
+     * Only clear mapped buffer reference of {@link GLBufferStorage}
+     * if native unmapping was successful.
+     * </p>
+     */
+    public synchronized final boolean unmapBuffer(final int bufferName,
+                                                  final UnmapBufferDispatch dispatch, final long glProcAddress) {
+        final GLBufferStorageImpl store = (GLBufferStorageImpl) bufferName2StorageMap.get(bufferName);
+        if (DEBUG && null == store ) {
+            System.err.printf("%s: %s.%s: Buffer %d not tracked%n", warning, msgClazzName, msgUnmapped, bufferName);
+            Thread.dumpStack();
+        }
+        final boolean res = dispatch.unmap(bufferName, glProcAddress);
+        if( res && null != store ) {
+            store.setMappedBuffer(null);
+        }
+        if (DEBUG) {
+            System.err.printf("%s.%s %s %d: %s%n", msgClazzName, msgUnmapped, res ? "OK" : "Failed", bufferName, store.toString(false));
+            if(!res) {
+                Thread.dumpStack();
+            }
+        }
+        return res;
+    }
+
+    public synchronized final long getBufferSize(final int bufferName) {
+        final GLBufferStorageImpl store = (GLBufferStorageImpl)bufferName2StorageMap.get(bufferName);
+        if ( null == store ) {
+            if (DEBUG) {
+                System.err.printf("%s: %s.getBufferSize(): Buffer %d not tracked%n", warning, msgClazzName, bufferName);
+                Thread.dumpStack();
+            }
+            return 0;
+        }
+        return store.getSize();
+    }
+
+    public synchronized final GLBufferStorage getBufferStorage(final int bufferName) {
+        return (GLBufferStorageImpl)bufferName2StorageMap.get(bufferName);
+    }
+
+    /**
+     * Clear all tracked buffer object knowledge.
+     * <p>
+     * Shall only be called at GLContext destruction <i>iff</i>
+     * there are no other shared GLContext instances left.
+     * </p>
+     */
+    public synchronized final void clear() {
+        if (DEBUG) {
+          System.err.printf("%s.clear() - Thread %s%n", msgClazzName, Thread.currentThread().getName());
+          // Thread.dumpStack();
+        }
+        bufferName2StorageMap.clear();
+    }
+
+    private static final String warning  = "WARNING";
+    private static final String msgClazzName = "GLBufferObjectTracker";
+    private static final String msgUnmapped = "notifyBufferUnmapped()";
+    private static final String msgCreateBound = "createBoundBufferStorage()";
+    private static final String msgCreateNamed = "createNamedBufferStorage()";
+    private static final String msgMapBuffer = "mapBuffer()";
+}
diff --git a/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java b/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java
deleted file mode 100644
index 78ab7cc93..000000000
--- a/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl;
-
-import javax.media.opengl.*;
-import com.jogamp.common.util.IntLongHashMap;
-
-/**
- * Tracks as closely as possible the sizes of allocated OpenGL buffer
- * objects. When glMapBuffer or glMapBufferARB is called, in order to
- * turn the resulting base address into a java.nio.ByteBuffer, we need
- * to know the size in bytes of the allocated OpenGL buffer object.
- * Previously we would compute this size by using
- * glGetBufferParameterivARB with a pname of GL_BUFFER_SIZE, but
- * it appears doing so each time glMapBuffer is called is too costly
- * on at least Apple's new multithreaded OpenGL implementation. <P>
- *
- * Instead we now try to track the sizes of allocated buffer objects.
- * We watch calls to glBindBuffer to see which buffer is bound to
- * which target and to glBufferData to see how large the buffer's
- * allocated size is. When glMapBuffer is called, we consult our table
- * of buffer sizes to see if we can return an answer without a glGet
- * call. <P>
- *
- * We share the GLBufferSizeTracker objects among all GLContexts for
- * which sharing is enabled, because the namespace for buffer objects
- * is the same for these contexts. <P>
- *
- * Tracking the state of which buffer objects are bound is done in the
- * GLBufferStateTracker and is not completely trivial. In the face of
- * calls to glPushClientAttrib / glPopClientAttrib we currently punt
- * and re-fetch the bound buffer object for the state in question;
- * see, for example, glVertexPointer and the calls down to
- * GLBufferStateTracker.getBoundBufferObject(). Note that we currently
- * ignore new binding targets such as GL_TRANSFORM_FEEDBACK_BUFFER_NV;
- * the fact that new binding targets may be added in the future makes
- * it impossible to cache state for these new targets. <P>
- *
- * Ignoring new binding targets, the primary situation in which we may
- * not be able to return a cached answer is in the case of an error,
- * where glBindBuffer may not have been called before trying to call
- * glBufferData. Also, if external native code modifies a buffer
- * object, we may return an incorrect answer. (FIXME: this case
- * requires more thought, and perhaps stochastic and
- * exponential-fallback checking. However, note that it can only occur
- * in the face of external native code which requires that the
- * application be signed anyway, so there is no security risk in this
- * area.)
- */
-
-public class GLBufferSizeTracker {
-  // Map from buffer names to sizes.
-  // Note: should probably have some way of shrinking this map, but
-  // can't just make it a WeakHashMap because nobody holds on to the
-  // keys; would have to always track creation and deletion of buffer
-  // objects, which is probably sub-optimal. The expected usage
-  // pattern of buffer objects indicates that the fact that this map
-  // never shrinks is probably not that bad.
-  private IntLongHashMap bufferSizeMap;
-  protected static final boolean DEBUG = Debug.isPropertyDefined("jogl.debug.GLBufferSizeTracker", true);
-
-  public GLBufferSizeTracker() {
-      bufferSizeMap = new IntLongHashMap();
-      bufferSizeMap.setKeyNotFoundValue(0xFFFFFFFFFFFFFFFFL);
-  }
-
-  public final void setBufferSize(GLBufferStateTracker bufferStateTracker,
-                                  int target, GL caller, long size) {
-    // Need to do some similar queries to getBufferSize below
-    int buffer = bufferStateTracker.getBoundBufferObject(target, caller);
-    if (buffer != 0) {
-      setDirectStateBufferSize(buffer, caller, size);
-    }
-    // We don't know the current buffer state. Note that the buffer
-    // state tracker will have made the appropriate OpenGL query if it
-    // didn't know what was going on, so at this point we have nothing
-    // left to do except drop this piece of information on the floor.
-  }
-
-  public final void setDirectStateBufferSize(int buffer, GL caller, long size) {
-      bufferSizeMap.put(buffer, size);
-  }
-
-  public final long getBufferSize(GLBufferStateTracker bufferStateTracker,
-                           int target,
-                           GL caller) {
-    // See whether we know what buffer is currently bound to the given
-    // state
-    final int buffer = bufferStateTracker.getBoundBufferObject(target, caller);
-    if (0 != buffer) {
-      return getBufferSizeImpl(target, buffer, caller);
-    }
-    // We don't know what's going on in this case; query the GL for an answer
-    // FIXME: both functions return 'int' types, which is not suitable,
-    // since buffer lenght is 64bit ?
-    int[] tmp = new int[1];
-    caller.glGetBufferParameteriv(target, GL.GL_BUFFER_SIZE, tmp, 0);
-    if (DEBUG) {
-      System.err.println("GLBufferSizeTracker.getBufferSize(): no cached buffer information");
-    }
-    return (long) tmp[0];
-  }
-
-  public final long getDirectStateBufferSize(int buffer, GL caller) {
-      return getBufferSizeImpl(0, buffer, caller);
-  }
-
-  private final long getBufferSizeImpl(int target, int buffer, GL caller) {
-      // See whether we know the size of this buffer object; at this
-      // point we almost certainly should if the application is
-      // written correctly
-      long sz = bufferSizeMap.get(buffer);
-      if (0xFFFFFFFFFFFFFFFFL == sz) {
-        // For robustness, try to query this value from the GL as we used to
-        // FIXME: both functions return 'int' types, which is not suitable,
-        // since buffer lenght is 64bit ?
-        int[] tmp = new int[1];
-        if(0==target) {
-            // DirectState ..
-            if(caller.isFunctionAvailable("glGetNamedBufferParameterivEXT")) {
-                caller.getGL2().glGetNamedBufferParameterivEXT(buffer, GL.GL_BUFFER_SIZE, tmp, 0);
-            } else {
-                throw new GLException("Error: getDirectStateBufferSize called with unknown state and GL function 'glGetNamedBufferParameterivEXT' n/a to query size");
-            }
-        } else {
-            caller.glGetBufferParameteriv(target, GL.GL_BUFFER_SIZE, tmp, 0);
-        }
-        if (tmp[0] == 0) {
-          // Assume something is wrong rather than silently going along
-          throw new GLException("Error: buffer size returned by "+
-                                ((0==target)?"glGetNamedBufferParameterivEXT":"glGetBufferParameteriv")+
-                                " was zero; probably application error");
-        }
-        // Assume we just don't know what's happening
-        sz = (long) tmp[0];
-        bufferSizeMap.put(buffer, sz);
-        if (DEBUG) {
-          System.err.println("GLBufferSizeTracker.getBufferSize(): made slow query to cache size " +
-                             sz +
-                             " for buffer " +
-                             buffer);
-        }
-      }
-      return sz;
-  }
-
-  // This should be called on any major event where we might start
-  // producing wrong answers, such as OpenGL context creation and
-  // destruction if we don't know whether there are other currently-
-  // created contexts that might be keeping the buffer objects alive
-  // that we're dealing with
-  public final void clearCachedBufferSizes() {
-    bufferSizeMap.clear();
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java b/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java
index 92e27cbd4..511c1b9b9 100644
--- a/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java
+++ b/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,6 +41,7 @@
 package jogamp.opengl;
 
 import javax.media.opengl.*;
+
 import com.jogamp.common.util.IntIntHashMap;
 
 /**
@@ -49,8 +50,13 @@ import com.jogamp.common.util.IntIntHashMap;
  * GLBufferStateTracker objects are allocated on a per-OpenGL-context basis.
  * This class is used to verify that e.g. the vertex
  * buffer object extension is in use when the glVertexPointer variant
- * taking a long as argument is called. <P>
- * 
+ * taking a long as argument is called.
+ * <p>
+ * The buffer binding state is local to it's OpenGL context,
+ * i.e. not shared across multiple OpenGL context.
+ * Hence this code is thread safe due to no multithreading usage.
+ * </p>
+ * <p>
  * Note that because the enumerated value used for the binding of a
  * buffer object (e.g. GL_ARRAY_BUFFER) is different than that used to
  * query the binding using glGetIntegerv (e.g.
@@ -60,50 +66,147 @@ import com.jogamp.common.util.IntIntHashMap;
  * to a particular state. It turns out that for some uses, such as
  * finding the size of the currently bound buffer, this doesn't
  * matter, though of course without knowing the buffer object we can't
- * re-associate the queried size with the buffer object ID. <P>
- *
- * Because the namespace of buffer objects is the unsigned integers
- * with 0 reserved by the GL, and because we have to be able to return
- * both 0 and other integers as valid answers from
- * getBoundBufferObject(), we need a second query, which is to ask
- * whether we know the state of the binding for a given target. For
- * "unknown" targets such as GL_TRANSFORM_FEEDBACK_BUFFER_NV we return
+ * re-associate the queried size with the buffer object ID.
+ * </p>
+ * <p>
+ * For <i>unknown</i> targets such as GL_TRANSFORM_FEEDBACK_BUFFER_NV we return
  * false from this, but we also clear the valid bit and later refresh
  * the binding state if glPushClientAttrib / glPopClientAttrib are
  * called, since we don't want the complexity of tracking stacks of
  * these attributes.
- *
+ * </p>
  */
 
 public class GLBufferStateTracker {
-  protected static final boolean DEBUG = Debug.isPropertyDefined("jogl.debug.GLBufferStateTracker", true);
+  protected static final boolean DEBUG;
+
+  static {
+      Debug.initSingleton();
+      DEBUG = Debug.isPropertyDefined("jogl.debug.GLBufferStateTracker", true);
+  }
+
   // Maps binding targets to buffer objects. A null value indicates
   // that the binding is unknown. A zero value indicates that it is
-  // known that no buffer is bound to the target, according to the 
-  // OpenGL specifications. 
+  // known that no buffer is bound to the target, according to the
+  // OpenGL specifications.
   // http://www.opengl.org/sdk/docs/man/xhtml/glBindBuffer.xml
-  private IntIntHashMap bindingMap;
+  private final IntIntHashMap bindingMap;
+  private final int bindingNotFound = 0xFFFFFFFF;
 
-  private int[] bufTmp = new int[1];
+  private final int[] bufTmp = new int[1];
 
   public GLBufferStateTracker() {
     bindingMap = new IntIntHashMap();
-    bindingMap.setKeyNotFoundValue(0xFFFFFFFF);
+    bindingMap.setKeyNotFoundValue(bindingNotFound);
 
     // Start with known unbound targets for known keys
+    // setBoundBufferObject(GL2ES3.GL_VERTEX_ARRAY_BINDING, 0); // not using default VAO (removed in GL3 core) - only explicit
     setBoundBufferObject(GL.GL_ARRAY_BUFFER,         0);
+    setBoundBufferObject(GL4.GL_DRAW_INDIRECT_BUFFER, 0);
     setBoundBufferObject(GL.GL_ELEMENT_ARRAY_BUFFER, 0);
     setBoundBufferObject(GL2.GL_PIXEL_PACK_BUFFER,   0);
     setBoundBufferObject(GL2.GL_PIXEL_UNPACK_BUFFER, 0);
   }
 
-  public final void setBoundBufferObject(int target, int value) {
-    bindingMap.put(target, value);
+
+  /**
+   *  GL_ARRAY_BUFFER​,
+   *  GL_ATOMIC_COUNTER_BUFFER​,
+   *  GL_COPY_READ_BUFFER​,
+   *  GL_COPY_WRITE_BUFFER​,
+   *  GL_DRAW_INDIRECT_BUFFER​,
+   *  GL_DISPATCH_INDIRECT_BUFFER​,
+   *  GL_ELEMENT_ARRAY_BUFFER​,
+   *  GL_PIXEL_PACK_BUFFER​,
+   *  GL_PIXEL_UNPACK_BUFFER​,
+   *  GL_SHADER_STORAGE_BUFFER​,
+   *  GL_TEXTURE_BUFFER​,
+   *  GL_TRANSFORM_FEEDBACK_BUFFER​ or
+   *  GL_UNIFORM_BUFFER​.
+   *
+   *  GL_VERTEX_ARRAY_BINDING
+   *
+   */
+  private static final int getQueryName(final int target) {
+      switch (target) {
+        case GL.GL_ARRAY_BUFFER:                  return GL.GL_ARRAY_BUFFER_BINDING;
+        case GL4.GL_ATOMIC_COUNTER_BUFFER:        return GL4.GL_ATOMIC_COUNTER_BUFFER_BINDING;
+        case GL2ES3.GL_COPY_READ_BUFFER:          return GL2ES3.GL_COPY_READ_BUFFER_BINDING;
+        case GL2ES3.GL_COPY_WRITE_BUFFER:         return GL2ES3.GL_COPY_WRITE_BUFFER_BINDING;
+        case GL4.GL_DRAW_INDIRECT_BUFFER:         return GL4.GL_DRAW_INDIRECT_BUFFER_BINDING;
+        case GL4.GL_DISPATCH_INDIRECT_BUFFER:     return GL4.GL_DISPATCH_INDIRECT_BUFFER_BINDING;
+        case GL.GL_ELEMENT_ARRAY_BUFFER:          return GL.GL_ELEMENT_ARRAY_BUFFER_BINDING;
+        case GL2.GL_PIXEL_PACK_BUFFER:            return GL2.GL_PIXEL_PACK_BUFFER_BINDING;
+        case GL2.GL_PIXEL_UNPACK_BUFFER:          return GL2.GL_PIXEL_UNPACK_BUFFER_BINDING;
+        // FIXME case GL4.GL_QUERY_BUFFER:              return GL4.GL_QUERY_BUFFER_BINDING;
+        case GL4.GL_SHADER_STORAGE_BUFFER:        return GL4.GL_SHADER_STORAGE_BUFFER_BINDING;
+        case GL2GL3.GL_TEXTURE_BUFFER:            return GL2GL3.GL_TEXTURE_BINDING_BUFFER;
+        case GL2ES3.GL_TRANSFORM_FEEDBACK_BUFFER: return GL2ES3.GL_TRANSFORM_FEEDBACK_BUFFER_BINDING;
+        case GL2ES3.GL_UNIFORM_BUFFER:            return GL2ES3.GL_UNIFORM_BUFFER_BINDING;
+
+        case GL2ES3.GL_VERTEX_ARRAY_BINDING:      return GL2ES3.GL_VERTEX_ARRAY_BINDING;
+
+        default:
+            throw new GLException(String.format("GL_INVALID_ENUM​: Invalid binding target 0x%X", target));
+      }
+  }
+  private static final void checkTargetName(final int target) {
+      switch (target) {
+        case GL.GL_ARRAY_BUFFER:
+        case GL4.GL_ATOMIC_COUNTER_BUFFER:
+        case GL2ES3.GL_COPY_READ_BUFFER:
+        case GL2ES3.GL_COPY_WRITE_BUFFER:
+        case GL4.GL_DRAW_INDIRECT_BUFFER:
+        case GL4.GL_DISPATCH_INDIRECT_BUFFER:
+        case GL.GL_ELEMENT_ARRAY_BUFFER:
+        case GL2.GL_PIXEL_PACK_BUFFER:
+        case GL2.GL_PIXEL_UNPACK_BUFFER:
+        // FIXME case GL4.GL_QUERY_BUFFER:
+        case GL4.GL_SHADER_STORAGE_BUFFER:
+        case GL2GL3.GL_TEXTURE_BUFFER:
+        case GL2ES3.GL_TRANSFORM_FEEDBACK_BUFFER:
+        case GL2ES3.GL_UNIFORM_BUFFER:
+
+        case GL2ES3.GL_VERTEX_ARRAY_BINDING:
+            return;
+
+        default:
+            throw new GLException(String.format("GL_INVALID_ENUM​: Invalid binding target 0x%X", target));
+      }
+  }
+
+  /**
+   * Must be called when binding a buffer, e.g.:
+   * <ul>
+   *   <li><code>glBindBuffer</code></li>
+   *   <li><code>glBindBufferBase</code></li>
+   *   <li><code>glBindBufferRange</code></li>
+   * </ul>
+   * @param target
+   * @param bufferName
+   */
+  public final void setBoundBufferObject(int target, int bufferName) {
+    checkTargetName(target);
+    final int oldBufferName = bindingMap.put(target, bufferName);
+    /***
+     * Test for clearing bound buffer states when unbinding VAO,
+     * Bug 692 Comment 5 is invalid, i.e. <https://jogamp.org/bugzilla/show_bug.cgi?id=692#c5>.
+     * However spec doesn't mention such behavior, and rendering w/ CPU sourced data
+     * after unbinding a VAO w/o unbinding the VBOs resulted to no visible image.
+     * Leaving code in here for discussion - in case I am wrong.
+     *
+    final int pre = bindingMap.put(target, bufferName);
+    if( GL2ES3.GL_VERTEX_ARRAY_BINDING == target && keyNotFound != pre && 0 == bufferName ) {
+        // Unbinding a previous bound VAO leads to unbinding of all buffers!
+        bindingMap.put(GL.GL_ARRAY_BUFFER,         0);
+        bindingMap.put(GL.GL_ELEMENT_ARRAY_BUFFER, 0);
+        bindingMap.put(GL2.GL_PIXEL_PACK_BUFFER,   0);
+        bindingMap.put(GL2.GL_PIXEL_UNPACK_BUFFER, 0);
+        bindingMap.put(GL4.GL_DRAW_INDIRECT_BUFFER, 0);
+    } */
     if (DEBUG) {
-      System.err.println();
-      System.err.println("GLBufferStateTracker.setBoundBufferObject() target 0x" + 
-                         Integer.toHexString(target) + " -> mapped bound buffer 0x" +
-                         Integer.toHexString(value));
+      System.err.println("GLBufferStateTracker.setBoundBufferObject() target " +
+                         toHexString(target) + ": " + toHexString(oldBufferName) + " -> " + toHexString(bufferName));
       // Thread.dumpStack();
     }
   }
@@ -114,27 +217,24 @@ public class GLBufferStateTracker {
       return value is valid. */
   public final int getBoundBufferObject(int target, GL caller) {
     int value = bindingMap.get(target);
-    if (0xFFFFFFFF == value) {
+    if (bindingNotFound == value) {
       // User probably either called glPushClientAttrib /
       // glPopClientAttrib or is querying an unknown target. See
       // whether we know how to fetch this state.
-      boolean gotQueryTarget = true;
-      int queryTarget = 0;
-      switch (target) {
-        case GL.GL_ARRAY_BUFFER:          queryTarget = GL.GL_ARRAY_BUFFER_BINDING;         break;
-        case GL.GL_ELEMENT_ARRAY_BUFFER:  queryTarget = GL.GL_ELEMENT_ARRAY_BUFFER_BINDING; break;
-        case GL2.GL_PIXEL_PACK_BUFFER:    queryTarget = GL2.GL_PIXEL_PACK_BUFFER_BINDING;    break;
-        case GL2.GL_PIXEL_UNPACK_BUFFER:  queryTarget = GL2.GL_PIXEL_UNPACK_BUFFER_BINDING;  break;
-        default:                          gotQueryTarget = false; break;
-      }
-      if (gotQueryTarget) {
+      final int queryTarget = getQueryName(target);
+      if ( 0 != queryTarget ) {
+        final int glerrPre = caller.glGetError(); // clear
         caller.glGetIntegerv(queryTarget, bufTmp, 0);
-        value = bufTmp[0];
+        final int glerrPost = caller.glGetError(); // be safe, e.g. GL '3.0 Mesa 8.0.4' may produce an error querying GL_PIXEL_UNPACK_BUFFER_BINDING, ignore value
+        if(GL.GL_NO_ERROR == glerrPost) {
+            value = bufTmp[0];
+        } else {
+            value = 0;
+        }
         if (DEBUG) {
-          System.err.println();
-          System.err.println("GLBufferStateTracker.getBoundBufferObject() [queried value]: target 0x" + 
-                             Integer.toHexString(target) + " / query 0x"+Integer.toHexString(queryTarget)+
-                             " -> mapped bound buffer 0x" + Integer.toHexString(value));
+          System.err.println("GLBufferStateTracker.getBoundBufferObject() glerr[pre "+toHexString(glerrPre)+", post "+toHexString(glerrPost)+"], [queried value]: target " +
+                             toHexString(target) + " / query "+toHexString(queryTarget)+
+                             " -> mapped bound buffer " + toHexString(value));
         }
         setBoundBufferObject(target, value);
         return value;
@@ -142,8 +242,7 @@ public class GLBufferStateTracker {
       return 0;
     }
     if (DEBUG) {
-      System.err.println();
-      System.err.println("GLBufferStateTracker.getBoundBufferObject() [mapped value]: target 0x" + 
+      System.err.println("GLBufferStateTracker.getBoundBufferObject() [mapped value]: target 0x" +
                          Integer.toHexString(target) + " -> mapped bound buffer 0x" +
                          Integer.toHexString(value));
     }
@@ -157,12 +256,12 @@ public class GLBufferStateTracker {
       from GLContext.makeCurrent() in the future to possibly increase
       the robustness of these caches in the face of external native
       code manipulating OpenGL state. */
-  public final void clearBufferObjectState() {
+  public final void clear() {
+    if (DEBUG) {
+      System.err.println("GLBufferStateTracker.clear() - Thread "+Thread.currentThread().getName());
+      // Thread.dumpStack();
+    }
     bindingMap.clear();
-        if (DEBUG) {
-          System.err.println();
-          System.err.println("GLBufferStateTracker.clearBufferObjectState()");
-          //Thread.dumpStack();
-        }
   }
+  private final String toHexString(int i) { return Integer.toHexString(i); }
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLContextImpl.java b/src/jogl/classes/jogamp/opengl/GLContextImpl.java
index 51201b3a9..9ccd78589 100644
--- a/src/jogl/classes/jogamp/opengl/GLContextImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLContextImpl.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,39 +29,51 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl;
 
+import java.lang.reflect.Method;
 import java.nio.ByteBuffer;
 import java.nio.IntBuffer;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.HashMap;
 import java.util.Map;
 
 import com.jogamp.common.os.DynamicLookupHelper;
+import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.ReflectionUtil;
-import com.jogamp.gluegen.runtime.FunctionAddressResolver;
+import com.jogamp.common.util.VersionNumber;
+import com.jogamp.common.util.VersionNumberString;
+import com.jogamp.common.util.locks.RecursiveLock;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
-import com.jogamp.gluegen.runtime.opengl.GLExtensionNames;
+import com.jogamp.gluegen.runtime.opengl.GLNameResolver;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLExtensions;
+import com.jogamp.opengl.GLRendererQuirks;
 
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.opengl.GL;
-import javax.media.opengl.GL3;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GL2ES3;
+import javax.media.opengl.GL2GL3;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDebugListener;
 import javax.media.opengl.GLDebugMessage;
 import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLPipelineFactory;
 import javax.media.opengl.GLProfile;
@@ -74,7 +86,7 @@ public abstract class GLContextImpl extends GLContext {
   private String contextFQN;
 
   private int additionalCtxCreationFlags;
-  
+
   // Cache of the functions that are available to be called at the current
   // moment in time
   protected ExtensionAvailabilityCache extensionAvailability;
@@ -82,19 +94,26 @@ public abstract class GLContextImpl extends GLContext {
   // OpenGL functions.
   private ProcAddressTable glProcAddressTable;
 
+  private String glVendor;
   private String glRenderer;
   private String glRendererLowerCase;
-  
-  // Tracks creation and initialization of buffer objects to avoid
+  private String glVersion;
+
+  // Tracks lifecycle of buffer objects to avoid
   // repeated glGet calls upon glMapBuffer operations
-  private GLBufferSizeTracker bufferSizeTracker; // Singleton - Set by GLContextShareSet
-  private GLBufferStateTracker bufferStateTracker = new GLBufferStateTracker();
-  private GLStateTracker glStateTracker = new GLStateTracker();
+  private final GLBufferObjectTracker bufferObjectTracker;
+  private final GLBufferStateTracker bufferStateTracker;
+  private final GLStateTracker glStateTracker = new GLStateTracker();
   private GLDebugMessageHandler glDebugHandler = null;
-  
+  private final int[] boundFBOTarget = new int[] { 0, 0 }; // { draw, read }
+  private int defaultVAO = 0;
+
   protected GLDrawableImpl drawable;
   protected GLDrawableImpl drawableRead;
 
+  private volatile boolean pixelDataEvaluated;
+  private int /* pixelDataInternalFormat, */ pixelDataFormat, pixelDataType;
+
   protected GL gl;
 
   protected static final Object mappedContextTypeObjectLock;
@@ -112,72 +131,128 @@ public abstract class GLContextImpl extends GLContext {
   public static void shutdownImpl() {
       mappedExtensionAvailabilityCache.clear();
       mappedGLProcAddress.clear();
-      mappedGLXProcAddress.clear();      
+      mappedGLXProcAddress.clear();
   }
-  
+
   public GLContextImpl(GLDrawableImpl drawable, GLContext shareWith) {
     super();
 
-    if (shareWith != null) {
+    bufferStateTracker = new GLBufferStateTracker();
+    if ( null != shareWith ) {
       GLContextShareSet.registerSharing(this, shareWith);
+      bufferObjectTracker = ((GLContextImpl)shareWith).getBufferObjectTracker();
+      assert (bufferObjectTracker != null) : "shared context hash null GLBufferObjectTracker: "+shareWith;
+    } else {
+      bufferObjectTracker = new GLBufferObjectTracker();
     }
-    GLContextShareSet.synchronizeBufferObjectSharing(shareWith, this);
 
     this.drawable = drawable;
     this.drawableRead = drawable;
-    
+
     this.glDebugHandler = new GLDebugMessageHandler(this);
   }
 
-  @Override
-  protected void resetStates() {
-      // Because we don't know how many other contexts we might be
-      // sharing with (and it seems too complicated to implement the
-      // GLObjectTracker's ref/unref scheme for the buffer-related
-      // optimizations), simply clear the cache of known buffers' sizes
-      // when we destroy contexts
-      if (bufferSizeTracker != null) {
-          bufferSizeTracker.clearCachedBufferSizes();
-      }
-
-      if (bufferStateTracker != null) {
-          bufferStateTracker.clearBufferObjectState();
+  private final void clearStates() {
+      if( !GLContextShareSet.hasCreatedSharedLeft(this) ) {
+        bufferObjectTracker.clear();
       }
+      bufferStateTracker.clear();
+      glStateTracker.setEnabled(false);
+      glStateTracker.clearStates();
+  }
 
-      if (glStateTracker != null) {
-          glStateTracker.clearStates(false);
+  @Override
+  protected void resetStates(boolean isInit) {
+      if( !isInit ) {
+          clearStates();
       }
-
       extensionAvailability = null;
       glProcAddressTable = null;
       gl = null;
       contextFQN = null;
       additionalCtxCreationFlags = 0;
 
-      glRenderer = "";
+      glVendor = "";
+      glRenderer = glVendor;
       glRendererLowerCase = glRenderer;
-      
-      super.resetStates();
+      glVersion = glVendor;
+
+      if (boundFBOTarget != null) { // <init>
+          boundFBOTarget[0] = 0; // draw
+          boundFBOTarget[1] = 0; // read
+      }
+
+      pixelDataEvaluated = false;
+
+      super.resetStates(isInit);
   }
 
-  public final void setGLReadDrawable(GLDrawable read) {
-    if(null!=read && drawable!=read && !isGLReadDrawableAvailable()) {
-        throw new GLException("GL Read Drawable not available");
+  @Override
+  public final GLDrawable setGLReadDrawable(GLDrawable read) {
+    if(!isGLReadDrawableAvailable()) {
+        throw new GLException("Setting read drawable feature not available");
     }
-    boolean lockHeld = lock.isOwner();
+    final boolean lockHeld = lock.isOwner(Thread.currentThread());
     if(lockHeld) {
         release();
+    } else if(lock.isLockedByOtherThread()) { // still could glitch ..
+        throw new GLException("GLContext current by other thread ("+lock.getOwner()+"), operation not allowed.");
     }
+    final GLDrawable old = drawableRead;
     drawableRead = ( null != read ) ? (GLDrawableImpl) read : drawable;
     if(lockHeld) {
         makeCurrent();
     }
+    return old;
   }
 
+  @Override
   public final GLDrawable getGLReadDrawable() {
     return drawableRead;
   }
 
+  @Override
+  public final GLDrawable setGLDrawable(GLDrawable readWrite, boolean setWriteOnly) {
+    if( drawable == readWrite && ( setWriteOnly || drawableRead == readWrite ) ) {
+        return drawable; // no change.
+    }
+    final Thread currentThread = Thread.currentThread();
+    if( lock.isLockedByOtherThread() ) {
+        throw new GLException("GLContext current by other thread "+lock.getOwner().getName()+", operation not allowed on this thread "+currentThread.getName());
+    }
+    final boolean lockHeld = lock.isOwner(currentThread);
+    if( lockHeld && lock.getHoldCount() > 1 ) {
+        // would need to makeCurrent * holdCount
+        throw new GLException("GLContext is recursively locked - unsupported for setGLDrawable(..)");
+    }
+    final GLDrawableImpl old = drawable;
+    if( isCreated() && null != old && old.isRealized() ) {
+        if(!lockHeld) {
+            makeCurrent();
+        }
+        associateDrawable(false);
+        if(!lockHeld) {
+            release();
+        }
+    }
+    if(lockHeld) {
+        release();
+    }
+    if( !setWriteOnly || drawableRead == drawable ) { // if !setWriteOnly || !explicitReadDrawable
+        drawableRead = (GLDrawableImpl) readWrite;
+    }
+    drawableRetargeted |= null != drawable && readWrite != drawable;
+    drawable = (GLDrawableImpl) readWrite ;
+    if( isCreated() && null != drawable && drawable.isRealized() ) {
+        makeCurrent(true); // implicit: associateDrawable(true)
+        if( !lockHeld ) {
+            release();
+        }
+    }
+    return old;
+  }
+
+  @Override
   public final GLDrawable getGLDrawable() {
     return drawable;
   }
@@ -186,30 +261,48 @@ public abstract class GLContextImpl extends GLContext {
     return (GLDrawableImpl) getGLDrawable();
   }
 
+  @Override
+  public final GL getRootGL() {
+      GL _gl = gl;
+      GL _parent = _gl.getDownstreamGL();
+      while ( null != _parent ) {
+          _gl = _parent;
+          _parent = _gl.getDownstreamGL();
+      }
+      return _gl;
+  }
+
+  @Override
   public final GL getGL() {
     return gl;
   }
 
+  @Override
   public GL setGL(GL gl) {
-    if(DEBUG) {
-        String sgl1 = (null!=this.gl)?this.gl.getClass().getSimpleName()+", "+this.gl.toString():"<null>";
-        String sgl2 = (null!=gl)?gl.getClass().getSimpleName()+", "+gl.toString():"<null>";
-        Exception e = new Exception("Info: setGL (OpenGL "+getGLVersion()+"): "+Thread.currentThread().getName()+", "+sgl1+" -> "+sgl2);
-        e.printStackTrace();
+    if( DEBUG ) {
+        final String sgl1 = (null!=this.gl)?this.gl.getClass().getSimpleName()+", "+this.gl.toString():"<null>";
+        final String sgl2 = (null!=gl)?gl.getClass().getSimpleName()+", "+gl.toString():"<null>";
+        System.err.println("Info: setGL (OpenGL "+getGLVersion()+"): "+getThreadName()+", "+sgl1+" -> "+sgl2);
+        Thread.dumpStack();
     }
     this.gl = gl;
     return gl;
   }
 
+  @Override
+  public final int getDefaultVAO() {
+      return defaultVAO;
+  }
+
   /**
    * Call this method to notify the OpenGL context
    * that the drawable has changed (size or position).
-   * 
+   *
    * <p>
-   * This is currently being used and overridden by Mac OSX, 
+   * This is currently being used and overridden by Mac OSX,
    * which issues the {@link jogamp.opengl.macosx.cgl.CGL#updateContext(long) NSOpenGLContext update()} call.
    * </p>
-   *  
+   *
    * @throws GLException
    */
   protected void drawableUpdatedNotify() throws GLException { }
@@ -217,22 +310,40 @@ public abstract class GLContextImpl extends GLContext {
   public abstract Object getPlatformGLExtensions();
 
   // Note: the surface is locked within [makeCurrent .. swap .. release]
+  @Override
   public void release() throws GLException {
     release(false);
   }
-  private void release(boolean force) throws GLException {
-    if(TRACE_SWITCH) {
-        System.err.println(getThreadName() +": GLContext.ContextSwitch: - release() - force: "+force+", "+lock);
+  private void release(boolean inDestruction) throws GLException {
+    if( TRACE_SWITCH ) {
+        System.err.println(getThreadName() +": GLContext.ContextSwitch[release.0]: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+", inDestruction: "+inDestruction+", "+lock);
     }
-    if ( !lock.isOwner() ) {
-      throw new GLException("Context not current on current thread "+Thread.currentThread().getName()+": "+this);
+    if ( !lock.isOwner(Thread.currentThread()) ) {
+        final String msg = getThreadName() +": Context not current on thread, obj " + toHexString(hashCode())+", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+", inDestruction: "+inDestruction+", "+lock;
+        if( DEBUG_TRACE_SWITCH ) {
+            System.err.println(msg);
+            if( null != lastCtxReleaseStack ) {
+                System.err.print("Last release call: ");
+                lastCtxReleaseStack.printStackTrace();
+            } else {
+                System.err.println("Last release call: NONE");
+            }
+        }
+        throw new GLException(msg);
     }
-    final boolean actualRelease = force || lock.getHoldCount() == 1 ;
-    try {        
+
+    Throwable drawableContextMadeCurrentException = null;
+    final boolean actualRelease = ( inDestruction || lock.getHoldCount() == 1 ) && 0 != contextHandle;
+    try {
         if( actualRelease ) {
-            if (contextHandle != 0) { // allow dbl-release
-                releaseImpl();
+            if( !inDestruction ) {
+                try {
+                    contextMadeCurrent(false);
+                } catch (Throwable t) {
+                    drawableContextMadeCurrentException = t;
+                }
             }
+            releaseImpl();
         }
     } finally {
       // exception prone ..
@@ -241,68 +352,106 @@ public abstract class GLContextImpl extends GLContext {
       }
       drawable.unlockSurface();
       lock.unlock();
-      if(TRACE_SWITCH) {
-          System.err.println(getThreadName() +": GLContext.ContextSwitch: - "+(actualRelease?"switch":"keep  ")+" - CONTEXT_RELEASE - "+lock);
+      if( DEBUG_TRACE_SWITCH ) {
+          final String msg = getThreadName() +": GLContext.ContextSwitch[release.X]: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+" - "+(actualRelease?"switch":"keep  ")+" - "+lock;
+          lastCtxReleaseStack = new Throwable(msg);
+          if( TRACE_SWITCH ) {
+              System.err.println(msg);
+              // Thread.dumpStack();
+          }
       }
     }
+    if(null != drawableContextMadeCurrentException) {
+      throw new GLException("GLContext.release(false) during GLDrawableImpl.contextMadeCurrent(this, false)", drawableContextMadeCurrentException);
+    }
+
   }
+  private Throwable lastCtxReleaseStack = null;
   protected abstract void releaseImpl() throws GLException;
 
+  @Override
   public final void destroy() {
-      if (DEBUG || TRACE_SWITCH) {          
-          System.err.println(getThreadName() + ": GLContextImpl.destroy.0: " + toHexString(contextHandle) +
-                  ", isShared "+GLContextShareSet.isShared(this)+" - "+lock);
+      if ( DEBUG_TRACE_SWITCH ) {
+          final long drawH = null != drawable ? drawable.getHandle() : 0;
+          System.err.println(getThreadName() + ": GLContextImpl.destroy.0: obj " + toHexString(hashCode()) + ", ctx " + toHexString(contextHandle) +
+                  ", surf "+toHexString(drawH)+", isShared "+GLContextShareSet.isShared(this)+" - "+lock);
       }
-      if (contextHandle != 0) {
-          int lockRes = drawable.lockSurface();
-          if (NativeSurface.LOCK_SURFACE_NOT_READY == lockRes) {
+      if ( 0 != contextHandle ) { // isCreated() ?
+          if ( null == drawable ) {
+              throw new GLException("GLContext created but drawable is null: "+toString());
+          }
+          final int lockRes = drawable.lockSurface();
+          if ( NativeSurface.LOCK_SURFACE_NOT_READY >= lockRes ) {
                 // this would be odd ..
                 throw new GLException("Surface not ready to lock: "+drawable);
           }
+          Throwable associateDrawableException = null;
           try {
+              if ( !drawable.isRealized() ) {
+                  throw new GLException("GLContext created but drawable not realized: "+toString());
+              }
               // Must hold the lock around the destroy operation to make sure we
               // don't destroy the context while another thread renders to it.
-              // FIXME: This is actually impossible now, since we acquired the surface lock already,
-              //        which is a prerequisite to acquire the context lock.
-              lock.lock(); // holdCount++ -> 1 or 2
+              lock.lock(); // holdCount++ -> 1 - n (1: not locked, 2-n: destroy while rendering)
               if ( lock.getHoldCount() > 2 ) {
-                  throw new GLException(getThreadName() + ": Lock was hold more than once - makeCurrent/release imbalance: "+lock);
+                  final String msg = getThreadName() + ": GLContextImpl.destroy: obj " + toHexString(hashCode()) + ", ctx " + toHexString(contextHandle);
+                  if ( DEBUG_TRACE_SWITCH ) {
+                      System.err.println(msg+" - Lock was hold more than once - makeCurrent/release imbalance: "+lock);
+                      Thread.dumpStack();
+                  }
               }
-              try {          
-                  // release current context
-                  if(null != glDebugHandler) {
-                      if(lock.getHoldCount() == 1) {
-                          // needs current context to disable debug handler
-                          makeCurrent();
+              try {
+                  // if not current, makeCurrent(), to call associateDrawable(..) and to disable debug handler
+                  if ( lock.getHoldCount() == 1 ) {
+                      if ( GLContext.CONTEXT_NOT_CURRENT == makeCurrent() ) {
+                          throw new GLException("GLContext.makeCurrent() failed: "+toString());
                       }
-                      glDebugHandler.enable(false);
                   }
+                  try {
+                      associateDrawable(false);
+                  } catch (Throwable t) {
+                      associateDrawableException = t;
+                  }
+                  if ( 0 != defaultVAO ) {
+                      final int[] tmp = new int[] { defaultVAO };
+                      final GL2ES3 gl2es3 = gl.getRootGL().getGL2ES3();
+                      gl2es3.glBindVertexArray(0);
+                      gl2es3.glDeleteVertexArrays(1, tmp, 0);
+                      defaultVAO = 0;
+                  }
+                  glDebugHandler.enable(false);
                   if(lock.getHoldCount() > 1) {
                       // pending release() after makeCurrent()
-                      release(true); 
+                      release(true);
                   }
                   destroyImpl();
                   contextHandle = 0;
                   glDebugHandler = null;
                   // this maybe impl. in a platform specific way to release remaining shared ctx.
-                  if(GLContextShareSet.contextDestroyed(this) && !GLContextShareSet.hasCreatedSharedLeft(this)) {
+                  if( GLContextShareSet.contextDestroyed(this) && !GLContextShareSet.hasCreatedSharedLeft(this) ) {
                       GLContextShareSet.unregisterSharing(this);
                   }
+                  resetStates(false);
               } finally {
                   lock.unlock();
-                  if (TRACE_SWITCH) {
-                      System.err.println(getThreadName() + ": GLContextImpl.destroy.X: " + toHexString(contextHandle) +
+                  if ( DEBUG_TRACE_SWITCH ) {
+                      System.err.println(getThreadName() + ": GLContextImpl.destroy.X: obj " + toHexString(hashCode()) + ", ctx " + toHexString(contextHandle) +
                               ", isShared "+GLContextShareSet.isShared(this)+" - "+lock);
                   }
               }
           } finally {
               drawable.unlockSurface();
           }
+          if( null != associateDrawableException ) {
+              throw new GLException("Exception @ destroy's associateDrawable(false)", associateDrawableException);
+          }
+      } else {
+          resetStates(false);
       }
-      resetStates();
   }
   protected abstract void destroyImpl() throws GLException;
 
+  @Override
   public final void copy(GLContext source, int mask) throws GLException {
     if (source.getHandle() == 0) {
       throw new GLException("Source OpenGL context has not been created");
@@ -311,8 +460,8 @@ public abstract class GLContextImpl extends GLContext {
       throw new GLException("Destination OpenGL context has not been created");
     }
 
-    int lockRes = drawable.lockSurface();
-    if (NativeSurface.LOCK_SURFACE_NOT_READY == lockRes) {
+    final int lockRes = drawable.lockSurface();
+    if (NativeSurface.LOCK_SURFACE_NOT_READY >= lockRes) {
         // this would be odd ..
         throw new GLException("Surface not ready to lock");
     }
@@ -364,98 +513,110 @@ public abstract class GLContextImpl extends GLContext {
    * @see #mapVersionAvailable
    * @see #destroyContextARBImpl
    */
-  public int makeCurrent() throws GLException {
-    boolean unlockContextAndDrawable = false;
-    int res = CONTEXT_NOT_CURRENT;
+  @Override
+  public final int makeCurrent() throws GLException {
+      return makeCurrent(false);
+  }
+
+  protected final int makeCurrent(boolean forceDrawableAssociation) throws GLException {
+    if( TRACE_SWITCH ) {
+        System.err.println(getThreadName() +": GLContext.ContextSwitch[makeCurrent.0]: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+" - "+lock);
+    }
 
     // Note: the surface is locked within [makeCurrent .. swap .. release]
-    int lockRes = drawable.lockSurface();
+    final int lockRes = drawable.lockSurface();
     if (NativeSurface.LOCK_SURFACE_NOT_READY >= lockRes) {
+        if( DEBUG_TRACE_SWITCH ) {
+            System.err.println(getThreadName() +": GLContext.ContextSwitch[makeCurrent.X1]: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+" - Surface Not Ready - CONTEXT_NOT_CURRENT - "+lock);
+        }
         return CONTEXT_NOT_CURRENT;
     }
+
+    boolean unlockResources = true; // Must be cleared if successful, otherwise finally block will release context and/or surface!
+    int res = CONTEXT_NOT_CURRENT;
     try {
-        if (NativeSurface.LOCK_SURFACE_CHANGED == lockRes) {
-            drawable.updateHandle();
-        }
-        
-        lock.lock();
-        try {        
-            // One context can only be current by one thread,
-            // and one thread can only have one context current!
-            final GLContext current = getCurrent();
-            if (current != null) {
-                if (current == this) {
-                    // Assume we don't need to make this context current again
-                    // For Mac OS X, however, we need to update the context to track resizes
-                    drawableUpdatedNotify();
-                    if(TRACE_SWITCH) {
-                        System.err.println(getThreadName() +": GLContext.ContextSwitch: - keep   - CONTEXT_CURRENT - "+lock);
-                    }
-                    return CONTEXT_CURRENT;
-                } else {
-                    current.release();
-                }
-            }    
-            if (0 == drawable.getHandle()) {
+        if ( drawable.isRealized() ) {
+            if ( 0 == drawable.getHandle() ) {
                 throw new GLException("drawable has invalid handle: "+drawable);
             }
-            res = makeCurrentWithinLock(lockRes);
-            unlockContextAndDrawable = CONTEXT_NOT_CURRENT == res;
-            
-            /**
-             * FIXME: refactor dependence on Java 2D / JOGL bridge
-                if ((tracker != null) &&
-                    (res == CONTEXT_CURRENT_NEW)) {
-                    // Increase reference count of GLObjectTracker
-                    tracker.ref();
+            lock.lock();
+            try {
+                // One context can only be current by one thread,
+                // and one thread can only have one context current!
+                final GLContext current = getCurrent();
+                if (current != null) {
+                    if (current == this) { // implicit recursive locking!
+                        // Assume we don't need to make this context current again
+                        // For Mac OS X, however, we need to update the context to track resizes
+                        drawableUpdatedNotify();
+                        unlockResources = false; // success
+                        if( TRACE_SWITCH ) {
+                            System.err.println(getThreadName() +": GLContext.ContextSwitch[makeCurrent.X2]: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+" - keep   - CONTEXT_CURRENT - "+lock);
+                        }
+                        return CONTEXT_CURRENT;
+                    } else {
+                        current.release();
+                    }
                 }
-             */
-        } catch (RuntimeException e) {
-          unlockContextAndDrawable = true;
-          throw e;
-        } finally {
-          if (unlockContextAndDrawable) {
-            lock.unlock();
-          }            
-        }
+                res = makeCurrentWithinLock(lockRes);
+                unlockResources = CONTEXT_NOT_CURRENT == res; // success ?
+
+                /**
+                 * FIXME: refactor dependence on Java 2D / JOGL bridge
+                    if ( tracker != null && res == CONTEXT_CURRENT_NEW ) {
+                        // Increase reference count of GLObjectTracker
+                        tracker.ref();
+                    }
+                 */
+            } catch (RuntimeException e) {
+              unlockResources = true;
+              throw e;
+            } finally {
+              if (unlockResources) {
+                if( DEBUG_TRACE_SWITCH ) {
+                  System.err.println(getThreadName() +": GLContext.ContextSwitch[makeCurrent.1]: Context lock.unlock() due to error, res "+makeCurrentResultToString(res)+", "+lock);
+                }
+                lock.unlock();
+              }
+            }
+        } /* if ( drawable.isRealized() ) */
     } catch (RuntimeException e) {
-      unlockContextAndDrawable = true;
+      unlockResources = true;
       throw e;
     } finally {
-      if (unlockContextAndDrawable) {
+      if (unlockResources) {
         drawable.unlockSurface();
-      }            
-    }
-    
-    if (res == CONTEXT_NOT_CURRENT) {
-      if(TRACE_SWITCH) {
-          System.err.println(getThreadName() +": GLContext.ContextSwitch: - switch - CONTEXT_NOT_CURRENT - "+lock);
       }
-    } else {
+    }
+
+    if (res != CONTEXT_NOT_CURRENT) {
       setCurrent(this);
       if(res == CONTEXT_CURRENT_NEW) {
         // check if the drawable's and the GL's GLProfile are equal
-        // throws an GLException if not 
+        // throws an GLException if not
         getGLDrawable().getGLProfile().verifyEquality(gl.getGLProfile());
-        
+
         glDebugHandler.init( isGL2GL3() && isGLDebugEnabled() );
 
         if(DEBUG_GL) {
-            gl = gl.getContext().setGL( GLPipelineFactory.create("javax.media.opengl.Debug", null, gl, null) );
+            setGL( GLPipelineFactory.create("javax.media.opengl.Debug", null, gl, null) );
             if(glDebugHandler.isEnabled()) {
                 glDebugHandler.addListener(new GLDebugMessageHandler.StdErrGLDebugListener(true));
             }
         }
         if(TRACE_GL) {
-            gl = gl.getContext().setGL( GLPipelineFactory.create("javax.media.opengl.Trace", null, gl, new Object[] { System.err } ) );
-        }               
-        if(DEBUG || TRACE_SWITCH) {
-            System.err.println(getThreadName() +": GLContext.ContextSwitch: - switch - CONTEXT_CURRENT_NEW - "+lock);
+            setGL( GLPipelineFactory.create("javax.media.opengl.Trace", null, gl, new Object[] { System.err } ) );
         }
-      } else if(TRACE_SWITCH) {
-        System.err.println(getThreadName() +": GLContext.ContextSwitch: - switch - CONTEXT_CURRENT - "+lock);
+
+        forceDrawableAssociation = true;
       }
 
+      if( forceDrawableAssociation ) {
+          associateDrawable(true);
+      }
+
+      contextMadeCurrent(true);
+
       /* FIXME: refactor dependence on Java 2D / JOGL bridge
 
       // Try cleaning up any stale server-side OpenGL objects
@@ -465,68 +626,94 @@ public abstract class GLContextImpl extends GLContext {
       }
       */
     }
+    if( TRACE_SWITCH ) {
+        System.err.println(getThreadName() +": GLContext.ContextSwitch[makeCurrent.X3]: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+", surf "+toHexString(drawable.getHandle())+" - switch - "+makeCurrentResultToString(res)+" - stateTracker.on "+glStateTracker.isEnabled()+" - "+lock);
+    }
     return res;
   }
 
   private final int makeCurrentWithinLock(int surfaceLockRes) throws GLException {
       if (!isCreated()) {
+        if( 0 >= drawable.getWidth() || 0 >= drawable.getHeight() ) {
+            if ( DEBUG_TRACE_SWITCH ) {
+                System.err.println(getThreadName() + ": Create GL context REJECTED (zero surface size) obj " + toHexString(hashCode()) + ", surf "+toHexString(drawable.getHandle())+" for " + getClass().getName());
+                System.err.println(drawable.toString());
+            }
+            return CONTEXT_NOT_CURRENT;
+        }
         if(DEBUG_GL) {
             // only impacts w/ createContextARB(..)
             additionalCtxCreationFlags |= GLContext.CTX_OPTION_DEBUG ;
         }
-    
-        final GLContextImpl shareWith = (GLContextImpl) GLContextShareSet.getShareContext(this);
+
+        final GLContextImpl shareWith = (GLContextImpl) GLContextShareSet.getCreatedShare(this);
+        final long shareWithHandle;
         if (null != shareWith) {
             shareWith.getDrawableImpl().lockSurface();
+            shareWithHandle = shareWith.getHandle();
+            if (0 == shareWithHandle) {
+                throw new GLException("GLContextShareSet returned an invalid OpenGL context: "+this);
+            }
+        } else {
+            shareWithHandle = 0;
         }
         final boolean created;
         try {
-            created = createImpl(shareWith); // may throws exception if fails!
+            created = createImpl(shareWithHandle); // may throws exception if fails
+            if( created && hasNoDefaultVAO() ) {
+                final int[] tmp = new int[1];
+                final GL rootGL = gl.getRootGL();
+                if( rootGL.isGL2ES3() ) { // FIXME remove if ES2 == ES3 later
+                    final GL2ES3 gl2es3 = rootGL.getGL2ES3();
+                    gl2es3.glGenVertexArrays(1, tmp, 0);
+                    defaultVAO = tmp[0];
+                    gl2es3.glBindVertexArray(defaultVAO);
+                }
+            }
         } finally {
             if (null != shareWith) {
                 shareWith.getDrawableImpl().unlockSurface();
-            }                
+            }
         }
-        if (DEBUG) {
+        if ( DEBUG_TRACE_SWITCH ) {
             if(created) {
-                System.err.println(getThreadName() + ": Create GL context OK: " + toHexString(contextHandle) + " for " + getClass().getName()+" - "+getGLVersion());
+                System.err.println(getThreadName() + ": Create GL context OK: obj " + toHexString(hashCode()) + ", ctx " + toHexString(contextHandle) + ", surf "+toHexString(drawable.getHandle())+" for " + getClass().getName()+" - "+getGLVersion());
+                // Thread.dumpStack();
             } else {
-                System.err.println(getThreadName() + ": Create GL context FAILED for " + getClass().getName());
+                System.err.println(getThreadName() + ": Create GL context FAILED obj " + toHexString(hashCode()) + ", surf "+toHexString(drawable.getHandle())+" for " + getClass().getName());
             }
-        }        
+        }
         if(!created) {
             return CONTEXT_NOT_CURRENT;
         }
-        
+
         // finalize mapping the available GLVersions, in case it's not done yet
-        {             
+        {
             final AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
             final AbstractGraphicsDevice device = config.getScreen().getDevice();
-            
-            if( !GLContext.getAvailableGLVersionsSet(device) ) {
-                final int reqMajor;
-                final int reqProfile;
-                if( 0 != ( ctxOptions & GLContext.CTX_PROFILE_ES) ) {
-                    // ES1 or ES2
-                    reqMajor = ctxMajorVersion;
-                    reqProfile = GLContext.CTX_PROFILE_ES;
-                } else {
-                    if(ctxMajorVersion<3 || ctxMajorVersion==3 && ctxMinorVersion==0) { 
+
+            // Non ARB desktop profiles may not have been registered
+            if( !GLContext.getAvailableGLVersionsSet(device) ) {        // not yet set
+                if( 0 == ( ctxOptions & GLContext.CTX_PROFILE_ES) ) {   // not ES profile
+                    final int reqMajor;
+                    final int reqProfile;
+                    if( ctxVersion.compareTo(Version300) <= 0 ) {
                         reqMajor = 2;
                     } else {
-                        reqMajor = ctxMajorVersion;
+                        reqMajor = ctxVersion.getMajor();
                     }
                     if( 0 != ( ctxOptions & GLContext.CTX_PROFILE_CORE) ) {
                         reqProfile = GLContext.CTX_PROFILE_CORE;
                     } else {
                         reqProfile = GLContext.CTX_PROFILE_COMPAT;
                     }
-                }
-                GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile,
-                                                ctxMajorVersion, ctxMinorVersion, ctxOptions);
-                GLContext.setAvailableGLVersionsSet(device);
-                if (DEBUG) {
-                  System.err.println(getThreadName() + ": createContextOLD-MapVersionsAvailable HAVE: " + device+" -> "+reqMajor+"."+reqProfile+ " -> "+getGLVersion());
+                    GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile,
+                                                    ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    GLContext.setAvailableGLVersionsSet(device);
+
+                    if (DEBUG) {
+                      System.err.println(getThreadName() + ": createContextOLD-MapVersionsAvailable HAVE: " + device+" -> "+reqMajor+"."+reqProfile+ " -> "+getGLVersion());
+                    }
                 }
             }
         }
@@ -537,30 +724,44 @@ public abstract class GLContextImpl extends GLContext {
       return CONTEXT_CURRENT;
   }
   protected abstract void makeCurrentImpl() throws GLException;
-  
-  /** 
+
+  /**
+   * Calls {@link GLDrawableImpl#associateContext(GLContext, boolean)}
+   */
+  protected void associateDrawable(boolean bound) {
+      drawable.associateContext(this, bound);
+  }
+
+  /**
+   * Calls {@link GLDrawableImpl#contextMadeCurrent(GLContext, boolean)}
+   */
+  protected void contextMadeCurrent(boolean current) {
+      drawable.contextMadeCurrent(this, current);
+  }
+
+  /**
    * Platform dependent entry point for context creation.<br>
    *
    * This method is called from {@link #makeCurrentWithinLock()} .. {@link #makeCurrent()} .<br>
    *
-   * The implementation shall verify this context with a 
+   * The implementation shall verify this context with a
    * <code>MakeContextCurrent</code> call.<br>
    *
    * The implementation <b>must</b> leave the context current.<br>
-   * 
+   *
    * @param share the shared context or null
    * @return the valid and current context if successful, or null
    * @throws GLException
    */
-  protected abstract boolean createImpl(GLContextImpl sharedWith) throws GLException ;
+  protected abstract boolean createImpl(long sharedWithHandle) throws GLException ;
 
-  /** 
+  /**
    * Platform dependent but harmonized implementation of the <code>ARB_create_context</code>
    * mechanism to create a context.<br>
    *
-   * This method is called from {@link #createContextARB}, {@link #createImpl(GLContextImpl)} .. {@link #makeCurrent()} .<br>
+   * This method is called from {@link #createContextARB}, {@link #createImpl(long)} .. {@link #makeCurrent()} .<br>
    *
-   * The implementation shall verify this context with a 
+   * The implementation shall verify this context with a
    * <code>MakeContextCurrent</code> call.<br>
    *
    * The implementation <b>must</b> leave the context current.<br>
@@ -582,8 +783,7 @@ public abstract class GLContextImpl extends GLContext {
    * @see #createContextARBImpl
    * @see #destroyContextARBImpl
    */
-  protected abstract long createContextARBImpl(long share, boolean direct, int ctxOptionFlags, 
-                                               int major, int minor);
+  protected abstract long createContextARBImpl(long share, boolean direct, int ctxOptionFlags, int major, int minor);
 
   /**
    * Destroy the context created by {@link #createContextARBImpl}.
@@ -616,13 +816,10 @@ public abstract class GLContextImpl extends GLContext {
    * @see #createContextARBImpl
    * @see #destroyContextARBImpl
    */
-  protected final long createContextARB(long share, boolean direct) 
+  protected final long createContextARB(final long share, final boolean direct)
   {
-    AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
-    AbstractGraphicsDevice device = config.getScreen().getDevice();
-    GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    GLProfile glp = glCaps.getGLProfile();
-    GLProfile glpImpl = glp.getImpl();
+    final AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
+    final AbstractGraphicsDevice device = config.getScreen().getDevice();
 
     if (DEBUG) {
       System.err.println(getThreadName() + ": createContextARB: mappedVersionsAvailableSet("+device.getConnection()+"): "+
@@ -631,64 +828,166 @@ public abstract class GLContextImpl extends GLContext {
 
     if ( !GLContext.getAvailableGLVersionsSet(device) ) {
         if(!mapGLVersions(device)) {
-            // none of the ARB context creation calls was successful, bail out 
+            // none of the ARB context creation calls was successful, bail out
             return 0;
         }
     }
 
-    int reqMajor;
-    if(glpImpl.isGL4()) {
-        reqMajor=4;
-    } else if (glpImpl.isGL3()) {
-        reqMajor=3;
-    } else /* if (glpImpl.isGL2()) */ {
-        reqMajor=2;
-    }
+    final GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final int[] reqMajorCTP = new int[] { 0, 0 };
+    GLContext.getRequestMajorAndCompat(glCaps.getGLProfile(), reqMajorCTP);
 
-    boolean compat = glpImpl.isGL2(); // incl GL3bc and GL4bc
+    if(DEBUG) {
+        System.err.println(getThreadName() + ": createContextARB: Requested "+GLContext.getGLVersion(reqMajorCTP[0], 0, reqMajorCTP[0], null));
+    }
     int _major[] = { 0 };
     int _minor[] = { 0 };
     int _ctp[] = { 0 };
     long _ctx = 0;
-
-    if( GLContext.getAvailableGLVersion(device, reqMajor, compat?CTX_PROFILE_COMPAT:CTX_PROFILE_CORE,
+    if( GLContext.getAvailableGLVersion(device, reqMajorCTP[0], reqMajorCTP[1],
                                         _major, _minor, _ctp)) {
         _ctp[0] |= additionalCtxCreationFlags;
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": createContextARB: Mapped "+GLContext.getGLVersion(_major[0], _minor[0], _ctp[0], null));
+        }
         _ctx = createContextARBImpl(share, direct, _ctp[0], _major[0], _minor[0]);
         if(0!=_ctx) {
-            setGLFunctionAvailability(true, _major[0], _minor[0], _ctp[0]);
+            if( !setGLFunctionAvailability(true, _major[0], _minor[0], _ctp[0], false /* strictMatch */, false /* withinGLVersionsMapping */) ) {
+                throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+            }
         }
     }
     return _ctx;
   }
 
-  private final boolean mapGLVersions(AbstractGraphicsDevice device) {    
+  private final boolean mapGLVersions(AbstractGraphicsDevice device) {
     synchronized (GLContext.deviceVersionAvailable) {
+        final long t0 = ( DEBUG ) ? System.nanoTime() : 0;
         boolean success = false;
         // Following GLProfile.GL_PROFILE_LIST_ALL order of profile detection { GL4bc, GL3bc, GL2, GL4, GL3, GL2GL3, GLES2, GL2ES2, GLES1, GL2ES1 }
-        success |= createContextARBMapVersionsAvailable(4, true  /* compat */);  // GL4bc
-        success |= createContextARBMapVersionsAvailable(3, true  /* compat */);  // GL3bc
-        success |= createContextARBMapVersionsAvailable(2, true  /* compat */);  // GL2        
-        success |= createContextARBMapVersionsAvailable(4, false /* core   */);  // GL4
-        success |= createContextARBMapVersionsAvailable(3, false /* core   */);  // GL3
+        boolean hasGL4bc = false;
+        boolean hasGL3bc = false;
+        boolean hasGL2   = false;
+        boolean hasGL4   = false;
+        boolean hasGL3   = false;
+
+        // Even w/ PROFILE_ALIASING, try to use true core GL profiles
+        // ensuring proper user behavior across platforms due to different feature sets!
+        //
+        if( Platform.OSType.MACOS == Platform.getOSType() &&
+            Platform.getOSVersionNumber().compareTo(Platform.OSXVersion.Mavericks) >= 0 ) {
+            /**
+             * OSX 10.9 GLRendererQuirks.GL4NeedsGL3Request, quirk is added as usual @ setRendererQuirks(..)
+             */
+            if( !hasGL4 && !hasGL3 ) {
+                hasGL3   = createContextARBMapVersionsAvailable(3, CTX_PROFILE_CORE);    // GL3
+                success |= hasGL3;
+                if( hasGL3 ) {
+                    final boolean isHWAccel = 0 == ( CTX_IMPL_ACCEL_SOFT & ctxOptions );
+                    if( isHWAccel && ctxVersion.getMajor() >= 4 ) {
+                        // Gotcha: Creating a '3.2' ctx delivers a >= 4 ctx.
+                        GLContext.mapAvailableGLVersion(device, 4, CTX_PROFILE_CORE, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                        hasGL4   = true;
+                        if(DEBUG) {
+                            System.err.println("Quirk Triggerd: "+GLRendererQuirks.toString(GLRendererQuirks.GL4NeedsGL3Request)+": cause: OS "+Platform.getOSType()+", OS Version "+Platform.getOSVersionNumber());
+                        }
+                    }
+                    resetStates(false); // clean this context states, since creation was temporary
+                }
+            }
+        }
+        if( !hasGL4 ) {
+            hasGL4   = createContextARBMapVersionsAvailable(4, CTX_PROFILE_CORE);    // GL4
+            success |= hasGL4;
+            if( hasGL4 ) {
+                if( 0 == ( CTX_IMPL_ACCEL_SOFT & ctxOptions ) ) {
+                    // Map hw-accel GL4 to all lower core profiles: GL3
+                    GLContext.mapAvailableGLVersion(device, 3, CTX_PROFILE_CORE, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    if( PROFILE_ALIASING ) {
+                        hasGL3   = true;
+                    }
+                }
+                resetStates(false); // clean context states, since creation was temporary
+            }
+        }
+        if( !hasGL3 ) {
+            hasGL3   = createContextARBMapVersionsAvailable(3, CTX_PROFILE_CORE);    // GL3
+            success |= hasGL3;
+            if( hasGL3 ) {
+                resetStates(false); // clean this context states, since creation was temporary
+            }
+        }
+        if( !hasGL4bc ) {
+            hasGL4bc = createContextARBMapVersionsAvailable(4, CTX_PROFILE_COMPAT);  // GL4bc
+            success |= hasGL4bc;
+            if( hasGL4bc ) {
+                if( !hasGL4 ) { // last chance .. ignore hw-accel
+                    GLContext.mapAvailableGLVersion(device, 4, CTX_PROFILE_CORE, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    hasGL4   = true;
+                }
+                if( !hasGL3 ) { // last chance .. ignore hw-accel
+                    GLContext.mapAvailableGLVersion(device, 3, CTX_PROFILE_CORE, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    hasGL3   = true;
+                }
+                if( 0 == ( CTX_IMPL_ACCEL_SOFT & ctxOptions ) ) {
+                    // Map hw-accel GL4bc to all lower compatible profiles: GL3bc, GL2
+                    GLContext.mapAvailableGLVersion(device, 3, CTX_PROFILE_COMPAT, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    GLContext.mapAvailableGLVersion(device, 2, CTX_PROFILE_COMPAT, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    if(PROFILE_ALIASING) {
+                        hasGL3bc = true;
+                        hasGL2   = true;
+                    }
+                }
+                resetStates(false); // clean this context states, since creation was temporary
+            }
+        }
+        if( !hasGL3bc ) {
+            hasGL3bc = createContextARBMapVersionsAvailable(3, CTX_PROFILE_COMPAT);  // GL3bc
+            success |= hasGL3bc;
+            if( hasGL3bc ) {
+                if(!hasGL3) {  // last chance .. ignore hw-accel
+                    GLContext.mapAvailableGLVersion(device, 3, CTX_PROFILE_CORE, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    hasGL3   = true;
+                }
+                if( 0 == ( CTX_IMPL_ACCEL_SOFT & ctxOptions ) ) {
+                    // Map hw-accel GL3bc to all lower compatible profiles: GL2
+                    GLContext.mapAvailableGLVersion(device, 2, CTX_PROFILE_COMPAT, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+                    if(PROFILE_ALIASING) {
+                        hasGL2   = true;
+                    }
+                }
+                resetStates(false); // clean this context states, since creation was temporary
+            }
+        }
+        if( !hasGL2 ) {
+            hasGL2   = createContextARBMapVersionsAvailable(2, CTX_PROFILE_COMPAT);  // GL2
+            success |= hasGL2;
+            if( hasGL2 ) {
+                resetStates(false); // clean this context states, since creation was temporary
+            }
+        }
         if(success) {
             // only claim GL versions set [and hence detected] if ARB context creation was successful
             GLContext.setAvailableGLVersionsSet(device);
+            if(DEBUG) {
+                final long t1 = System.nanoTime();
+                System.err.println("GLContextImpl.mapGLVersions: "+device+", profileAliasing: "+PROFILE_ALIASING+", total "+(t1-t0)/1e6 +"ms");
+                System.err.println(GLContext.dumpAvailableGLVersions(null).toString());
+            }
         } else if (DEBUG) {
             System.err.println(getThreadName() + ": createContextARB-MapVersions NONE for :"+device);
-        }        
+        }
         return success;
     }
   }
 
-  private final boolean createContextARBMapVersionsAvailable(int reqMajor, boolean compat) {
+  /**
+   * Note: Since context creation is temporary, caller need to issue {@link #resetStates(boolean)}, if creation was successful, i.e. returns true.
+   * This method does not reset the states, allowing the caller to utilize the state variables.
+   **/
+  private final boolean createContextARBMapVersionsAvailable(int reqMajor, int reqProfile) {
     long _context;
-    int reqProfile = compat ? CTX_PROFILE_COMPAT : CTX_PROFILE_CORE ;
-    int ctp = CTX_IS_ARB_CREATED | CTX_PROFILE_CORE; // default
-    if(compat) {
-        ctp &= ~CTX_PROFILE_CORE ;
-        ctp |=  CTX_PROFILE_COMPAT ;
-    }
+    int ctp = CTX_IS_ARB_CREATED | reqProfile;
 
     // To ensure GL profile compatibility within the JOGL application
     // we always try to map against the highest GL version,
@@ -698,104 +997,93 @@ public abstract class GLContextImpl extends GLContext {
     int major[] = new int[1];
     int minor[] = new int[1];
     if( 4 == reqMajor ) {
-        majorMax=4; minorMax=GLContext.getMaxMinor(majorMax);
+        majorMax=4; minorMax=GLContext.getMaxMinor(ctp, majorMax);
         majorMin=4; minorMin=0;
     } else if( 3 == reqMajor ) {
-        majorMax=3; minorMax=GLContext.getMaxMinor(majorMax);
+        majorMax=3; minorMax=GLContext.getMaxMinor(ctp, majorMax);
         majorMin=3; minorMin=1;
     } else /* if( glp.isGL2() ) */ {
-        // our minimum desktop OpenGL runtime requirements are 1.1, 
-        // nevertheless we restrict ARB context creation to 2.0 to spare us futile attempts 
+        // our minimum desktop OpenGL runtime requirements are 1.1,
+        // nevertheless we restrict ARB context creation to 2.0 to spare us futile attempts
         majorMax=3; minorMax=0;
         majorMin=2; minorMin=0;
     }
-    _context = createContextARBVersions(0, true, ctp, 
+    _context = createContextARBVersions(0, true, ctp,
                                         /* max */ majorMax, minorMax,
                                         /* min */ majorMin, minorMin,
                                         /* res */ major, minor);
 
-    if(0==_context && !compat) {
+    if( 0 == _context && CTX_PROFILE_CORE == reqProfile && !PROFILE_ALIASING ) {
         // try w/ FORWARD instead of CORE
         ctp &= ~CTX_PROFILE_CORE ;
         ctp |=  CTX_OPTION_FORWARD ;
-        _context = createContextARBVersions(0, true, ctp, 
+        _context = createContextARBVersions(0, true, ctp,
                                             /* max */ majorMax, minorMax,
                                             /* min */ majorMin, minorMin,
                                             /* res */ major, minor);
-       if(0==_context) {
+       if( 0 == _context ) {
             // Try a compatible one .. even though not requested .. last resort
             ctp &= ~CTX_PROFILE_CORE ;
             ctp &= ~CTX_OPTION_FORWARD ;
             ctp |=  CTX_PROFILE_COMPAT ;
-            _context = createContextARBVersions(0, true, ctp, 
+            _context = createContextARBVersions(0, true, ctp,
                                        /* max */ majorMax, minorMax,
                                        /* min */ majorMin, minorMin,
                                        /* res */ major, minor);
        }
     }
-    if(0!=_context) {
-        AbstractGraphicsDevice device = drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice();        
-        // ctxMajorVersion, ctxMinorVersion, ctxOptions is being set by 
+    final boolean res;
+    if( 0 != _context ) {
+        AbstractGraphicsDevice device = drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice();
+        // ctxMajorVersion, ctxMinorVersion, ctxOptions is being set by
         //   createContextARBVersions(..) -> setGLFunctionAvailbility(..) -> setContextVersion(..)
-        GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile, ctxMajorVersion, ctxMinorVersion, ctxOptions);
+        GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
         destroyContextARBImpl(_context);
         if (DEBUG) {
           System.err.println(getThreadName() + ": createContextARB-MapVersionsAvailable HAVE: " +reqMajor+"."+reqProfile+ " -> "+getGLVersion());
         }
-        // only reset [and hence modify] this context state if ARB context creation was successful
-        resetStates(); 
-        return true;
+        res = true;
     } else {
         if (DEBUG) {
           System.err.println(getThreadName() + ": createContextARB-MapVersionsAvailable NOPE: "+reqMajor+"."+reqProfile);
-        }        
-        return false;
+        }
+        res = false;
     }
+    return res;
   }
 
-  private final long createContextARBVersions(long share, boolean direct, int ctxOptionFlags, 
-                                              int majorMax, int minorMax, 
-                                              int majorMin, int minorMin, 
+  private final long createContextARBVersions(long share, boolean direct, int ctxOptionFlags,
+                                              int majorMax, int minorMax,
+                                              int majorMin, int minorMin,
                                               int major[], int minor[]) {
     major[0]=majorMax;
     minor[0]=minorMax;
     long _context=0;
-    boolean ok = false;
-
-    while ( !ok &&
-            GLContext.isValidGLVersion(major[0], minor[0]) &&
-            ( major[0]>majorMin || major[0]==majorMin && minor[0] >=minorMin ) ) {
+    int i=0;
 
+    do {
         if (DEBUG) {
-            System.err.println(getThreadName() + ": createContextARBVersions: share "+share+", direct "+direct+", version "+major[0]+"."+minor[0]);
+            i++;
+            System.err.println(getThreadName() + ": createContextARBVersions."+i+": share "+share+", direct "+direct+
+                    ", version "+major[0]+"."+minor[0]+", major["+majorMin+".."+majorMax+"], minor["+minorMin+".."+minorMax+"]");
         }
         _context = createContextARBImpl(share, direct, ctxOptionFlags, major[0], minor[0]);
 
         if(0 != _context) {
-            ok = true;
-            setGLFunctionAvailability(true, major[0], minor[0], ctxOptionFlags);            
-        } else {
-            ok = false;            
-        }
-        
-        if(ok && major[0]>=3) {
-            int[] hasMajor = new int[1]; int[] hasMinor = new int[1];
-            gl.glGetIntegerv(GL3.GL_MAJOR_VERSION, hasMajor, 0);
-            gl.glGetIntegerv(GL3.GL_MINOR_VERSION, hasMinor, 0);
-            ok = hasMajor[0]>major[0] || ( hasMajor[0]==major[0] && hasMinor[0]>=minor[0] ) ;
-            if(!ok) {
-                removeCachedVersion(major[0], minor[0], ctxOptionFlags);
+            if( setGLFunctionAvailability(true, major[0], minor[0], ctxOptionFlags, true /* strictMatch */, true /* withinGLVersionsMapping */) ) {
+                break;
+            } else {
                 destroyContextARBImpl(_context);
                 _context = 0;
             }
-            if (DEBUG) {
-                System.err.println(getThreadName() + ": createContextARBVersions: version verification - expected "+major[0]+"."+minor[0]+", has "+hasMajor[0]+"."+hasMinor[0]+" == "+ok);
-            }
-        }
-        
-        if(!ok) {
-            if(!GLContext.decrementGLVersion(major, minor)) break;
         }
+
+    } while ( ( major[0]>majorMin || major[0]==majorMin && minor[0] >minorMin ) &&  // #1 check whether version is above lower limit
+              GLContext.decrementGLVersion(ctxOptionFlags, major, minor)            // #2 decrement version
+            );
+    if (DEBUG) {
+        System.err.println(getThreadName() + ": createContextARBVersions.X: ctx "+toHexString(_context)+", share "+share+", direct "+direct+
+                ", version "+major[0]+"."+minor[0]+", major["+majorMin+".."+majorMax+"], minor["+minorMin+".."+minorMax+"]");
     }
     return _context;
   }
@@ -805,52 +1093,31 @@ public abstract class GLContextImpl extends GLContext {
   // As a last resort, the GL_VERSION string may be used ..
   //
 
-  /** 
-   * If major > 0 || minor > 0 : Use passed values, determined at creation time 
-   * If major==0 && minor == 0 : Use GL_VERSION
+  /**
+   * If major > 0 || minor > 0 : Use passed values, determined at creation time
    * Otherwise .. don't touch ..
    */
-  private final void setContextVersion(int major, int minor, int ctp, boolean setVersionString) {
-      if (0==ctp) {
+  private final void setContextVersion(int major, int minor, int ctp, VersionNumberString glVendorVersion, boolean useGL) {
+      if ( 0 == ctp ) {
         throw new GLException("Invalid GL Version "+major+"."+minor+", ctp "+toHexString(ctp));
       }
-      if(major>0 || minor>0) {
-          if (!GLContext.isValidGLVersion(major, minor)) {
-            GLException e = new GLException("Invalid GL Version "+major+"."+minor+", ctp "+toHexString(ctp));
-            throw e;
-          }
-          ctxMajorVersion = major;
-          ctxMinorVersion = minor;
-          ctxOptions = ctp;
-          if(setVersionString) {
-              ctxVersionString = getGLVersion(ctxMajorVersion, ctxMinorVersion, ctxOptions, getGL().glGetString(GL.GL_VERSION));
-          }
-          return;
-      }
-
-      if(major==0 && minor==0) {
-          String versionStr = getGL().glGetString(GL.GL_VERSION);
-          if(null==versionStr) {
-            throw new GLException("GL_VERSION is NULL: "+this);
-          }
-          ctxOptions = ctp;
-
-          // Set version
-          GLVersionNumber version = new GLVersionNumber(versionStr);
-          if (version.isValid()) {
-            ctxMajorVersion = version.getMajor();
-            ctxMinorVersion = version.getMinor();
-            // We cannot promote a non ARB context to >= 3.1,
-            // reduce it to 3.0 then.
-            if ( ( ctxMajorVersion>3 || ctxMajorVersion==3 && ctxMinorVersion>=1 )
-                 && 0 == (ctxOptions & CTX_IS_ARB_CREATED) ) {
-                ctxMajorVersion = 3;
-                ctxMinorVersion = 0;
-            }
-            if(setVersionString) {
-                ctxVersionString = getGLVersion(ctxMajorVersion, ctxMinorVersion, ctxOptions, versionStr);
-            }
-            return;
+      ctxVersion = new VersionNumber(major, minor, 0);
+      ctxVersionString = getGLVersion(major, minor, ctp, glVersion);
+      ctxVendorVersion = glVendorVersion;
+      ctxOptions = ctp;
+      if(useGL) {
+          ctxGLSLVersion = VersionNumber.zeroVersion;
+          if( hasGLSL() ) { // >= ES2 || GL2.0
+              final String glslVersion = isGLES() ? null : gl.glGetString(GL2ES2.GL_SHADING_LANGUAGE_VERSION) ; // Use static GLSL version for ES to be safe!
+              if( null != glslVersion ) {
+                  ctxGLSLVersion = new VersionNumber(glslVersion);
+                  if( ctxGLSLVersion.getMajor() < 1 ) {
+                      ctxGLSLVersion = VersionNumber.zeroVersion; // failed ..
+                  }
+              }
+              if( ctxGLSLVersion.isZero() ) {
+                  ctxGLSLVersion = getStaticGLSLVersionNumber(major, minor, ctxOptions);
+              }
           }
       }
   }
@@ -859,18 +1126,18 @@ public abstract class GLContextImpl extends GLContext {
   // Helpers for various context implementations
   //
 
-  private Object createInstance(GLProfile glp, String suffix, Class<?>[] cstrArgTypes, Object[] cstrArgs) {
-    return ReflectionUtil.createInstance(glp.getGLImplBaseClassName()+suffix, cstrArgTypes, cstrArgs, getClass().getClassLoader());
+  private Object createInstance(GLProfile glp, boolean glObject, Object[] cstrArgs) {
+      return ReflectionUtil.createInstance(glp.getGLCtor(glObject), cstrArgs);
   }
 
   private boolean verifyInstance(GLProfile glp, String suffix, Object instance) {
-    return ReflectionUtil.instanceOf(instance, glp.getGLImplBaseClassName()+suffix);
+      return ReflectionUtil.instanceOf(instance, glp.getGLImplBaseClassName()+suffix);
   }
 
   /** Create the GL for this context. */
   protected GL createGL(GLProfile glp) {
-    GL gl = (GL) createInstance(glp, "Impl", new Class[] { GLProfile.class, GLContextImpl.class }, new Object[] { glp, this } );
-    
+    final GL gl = (GL) createInstance(glp, true, new Object[] { glp, this } );
+
     /* FIXME: refactor dependence on Java 2D / JOGL bridge
     if (tracker != null) {
       gl.setObjectTracker(tracker);
@@ -878,11 +1145,32 @@ public abstract class GLContextImpl extends GLContext {
     */
     return gl;
   }
-  
+
+  /**
+   * Finalizes GL instance initialization after this context has been initialized.
+   * <p>
+   * Method calls 'void finalizeInit()' of instance 'gl' as retrieved by reflection, if exist.
+   * </p>
+   */
+  private void finalizeInit(GL gl) {
+      Method finalizeInit = null;
+      try {
+          finalizeInit = ReflectionUtil.getMethod(gl.getClass(), "finalizeInit", new Class<?>[]{ });
+      } catch ( Throwable t ) {
+          if(DEBUG) {
+              System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+              t.printStackTrace();
+          }
+      }
+      if( null != finalizeInit ) {
+          ReflectionUtil.callMethod(gl, finalizeInit, new Object[]{ });
+      }
+  }
+
   public final ProcAddressTable getGLProcAddressTable() {
     return glProcAddressTable;
   }
-  
+
   /**
    * Shall return the platform extension ProcAddressTable,
    * ie for GLXExt, EGLExt, ..
@@ -890,18 +1178,22 @@ public abstract class GLContextImpl extends GLContext {
   public abstract ProcAddressTable getPlatformExtProcAddressTable();
 
   /**
-   * Pbuffer support; given that this is a GLContext associated with a
-   * pbuffer, binds this pbuffer to its texture target.
+   * Part of <code>GL_NV_vertex_array_range</code>.
+   * <p>
+   * Provides platform-independent access to the <code>wglAllocateMemoryNV</code> /
+   * <code>glXAllocateMemoryNV</code>.
+   * </p>
    */
-  public abstract void bindPbufferToTexture();
+  public abstract ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority);
 
   /**
-   * Pbuffer support; given that this is a GLContext associated with a
-   * pbuffer, releases this pbuffer from its texture target.
+   * Part of <code>GL_NV_vertex_array_range</code>.
+   * <p>
+   * Provides platform-independent access to the <code>wglFreeMemoryNV</code> /
+   * <code>glXFreeMemoryNV</code>.
+   * </p>
    */
-  public abstract void releasePbufferFromTexture();
-
-  public abstract ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3);
+  public abstract void glFreeMemoryNV(ByteBuffer pointer);
 
   /** Maps the given "platform-independent" function name to a real function
       name. Currently this is only used to map "glAllocateMemoryNV" and
@@ -918,8 +1210,8 @@ public abstract class GLContextImpl extends GLContext {
 
   /** Maps the given "platform-independent" extension name to a real
       function name. Currently this is only used to map
-      "GL_ARB_pbuffer"      to  "WGL_ARB_pbuffer/GLX_SGIX_pbuffer" and 
-      "GL_ARB_pixel_format" to  "WGL_ARB_pixel_format/n.a." 
+      "GL_ARB_pbuffer"      to  "WGL_ARB_pbuffer/GLX_SGIX_pbuffer" and
+      "GL_ARB_pixel_format" to  "WGL_ARB_pixel_format/n.a."
    */
   protected final String mapToRealGLExtensionName(String glExtensionName) {
     Map<String, String> map = getExtensionNameMap();
@@ -933,41 +1225,118 @@ public abstract class GLContextImpl extends GLContext {
 
   /** Helper routine which resets a ProcAddressTable generated by the
       GLEmitter by looking up anew all of its function pointers. */
-  protected final void resetProcAddressTable(ProcAddressTable table) {
-    table.reset(getDrawableImpl().getGLDynamicLookupHelper() );
+  protected final void resetProcAddressTable(final ProcAddressTable table) {
+    AccessController.doPrivileged(new PrivilegedAction<Object>() {
+        @Override
+        public Object run() {
+            table.reset(getDrawableImpl().getGLDynamicLookupHelper() );
+            return null;
+        }
+    } );
   }
 
-  private final void initGLRendererStrings()  {
+  private final boolean initGLRendererAndGLVersionStrings()  {
     final GLDynamicLookupHelper glDynLookupHelper = getDrawableImpl().getGLDynamicLookupHelper();
     final long _glGetString = glDynLookupHelper.dynamicLookupFunction("glGetString");
     if(0 == _glGetString) {
-        // FIXME
-        System.err.println("Warning: Entry point to 'glGetString' is NULL.");
-        Thread.dumpStack();        
+        System.err.println("Error: Entry point to 'glGetString' is NULL.");
+        if(DEBUG) {
+            Thread.dumpStack();
+        }
+        return false;
     } else {
+        final String _glVendor = glGetStringInt(GL.GL_VENDOR, _glGetString);
+        if(null == _glVendor) {
+            if(DEBUG) {
+                System.err.println("Warning: GL_VENDOR is NULL.");
+                Thread.dumpStack();
+            }
+            return false;
+        }
+        glVendor = _glVendor;
+
         final String _glRenderer = glGetStringInt(GL.GL_RENDERER, _glGetString);
         if(null == _glRenderer) {
+            if(DEBUG) {
+                System.err.println("Warning: GL_RENDERER is NULL.");
+                Thread.dumpStack();
+            }
+            return false;
+        }
+        glRenderer = _glRenderer;
+        glRendererLowerCase = glRenderer.toLowerCase();
+
+        final String _glVersion = glGetStringInt(GL.GL_VERSION, _glGetString);
+        if(null == _glVersion) {
             // FIXME
-            System.err.println("Warning: GL_RENDERER is NULL.");
-            Thread.dumpStack();                
-        } else {
-            glRenderer = _glRenderer;
-            glRendererLowerCase = glRenderer.toLowerCase();
+            if(DEBUG) {
+                System.err.println("Warning: GL_VERSION is NULL.");
+                Thread.dumpStack();
+            }
+            return false;
+        }
+        glVersion = _glVersion;
+
+        return true;
+    }
+  }
+
+  /**
+   * Returns null if version string is invalid, otherwise a valid instance.
+   * <p>
+   * Note: Non ARB ctx is limited to GL 3.0.
+   * </p>
+   */
+  private static final VersionNumber getGLVersionNumber(int ctp, String glVersionStr) {
+      if( null != glVersionStr ) {
+          final GLVersionNumber version = GLVersionNumber.create(glVersionStr);
+          if ( version.isValid() ) {
+              int[] major = new int[] { version.getMajor() };
+              int[] minor = new int[] { version.getMinor() };
+              if ( GLContext.isValidGLVersion(ctp, major[0], minor[0]) ) {
+                  return new VersionNumber(major[0], minor[0], 0);
+              }
+          }
+      }
+      return null;
+  }
+
+  /**
+   * Returns false if <code>glGetIntegerv</code> is inaccessible, otherwise queries major.minor
+   * version for given arrays.
+   * <p>
+   * If the GL query fails, major will be zero.
+   * </p>
+   */
+  private final boolean getGLIntVersion(int[] glIntMajor, int[] glIntMinor)  {
+    glIntMajor[0] = 0; // clear
+    final GLDynamicLookupHelper glDynLookupHelper = getDrawableImpl().getGLDynamicLookupHelper();
+    final long _glGetIntegerv = glDynLookupHelper.dynamicLookupFunction("glGetIntegerv");
+    if( 0 == _glGetIntegerv ) {
+        System.err.println("Error: Entry point to 'glGetIntegerv' is NULL.");
+        if(DEBUG) {
+            Thread.dumpStack();
         }
+        return false;
+    } else {
+        glGetIntegervInt(GL2GL3.GL_MAJOR_VERSION, glIntMajor, 0, _glGetIntegerv);
+        glGetIntegervInt(GL2GL3.GL_MINOR_VERSION, glIntMinor, 0, _glGetIntegerv);
+        return true;
     }
   }
-  
-  protected final String getGLRendererString(boolean lowerCase) {
-      return lowerCase ? glRendererLowerCase : glRenderer;
+
+  protected final int getCtxOptions() {
+      return ctxOptions;
   }
-  
+
+
   /**
    * Sets the OpenGL implementation class and
    * the cache of which GL functions are available for calling through this
    * context. See {@link #isFunctionAvailable(String)} for more information on
    * the definition of "available".
    * <br>
-   * All ProcaddressTables are being determined, the GL version is being set
+   * All ProcaddressTables are being determined and cached, the GL version is being set
    * and the extension cache is determined as well.
    *
    * @param force force the setting, even if is already being set.
@@ -975,33 +1344,227 @@ public abstract class GLContextImpl extends GLContext {
    * @param major OpenGL major version
    * @param minor OpenGL minor version
    * @param ctxProfileBits OpenGL context profile and option bits, see {@link javax.media.opengl.GLContext#CTX_OPTION_ANY}
-   * 
+   * @param strictMatch if <code>true</code> the ctx must
+   *                    <ul>
+   *                      <li>be greater or equal than the requested <code>major.minor</code> version, and</li>
+   *                      <li>match the ctxProfileBits</li>
+   *                      <li>match ES major versions</li>
+   *                    </ul>, otherwise method aborts and returns <code>false</code>.<br>
+   *                    if <code>false</code> no version check is performed.
+   * @param withinGLVersionsMapping if <code>true</code> GL version mapping is in process, i.e. quering avail versions.
+   *                                Otherwise normal user context creation.
+   * @return returns <code>true</code> if successful, otherwise <code>false</code>.<br>
+   *                 If <code>strictMatch</code> is <code>false</code> method shall always return <code>true</code> or throw an exception.
+   *                 If <code>false</code> is returned, no data has been cached or mapped, i.e. ProcAddressTable, Extensions, Version, etc.
    * @see #setContextVersion
    * @see javax.media.opengl.GLContext#CTX_OPTION_ANY
    * @see javax.media.opengl.GLContext#CTX_PROFILE_COMPAT
    * @see javax.media.opengl.GLContext#CTX_IMPL_ES2_COMPAT
    */
-  protected final void setGLFunctionAvailability(boolean force, int major, int minor, int ctxProfileBits) {
+  protected final boolean setGLFunctionAvailability(boolean force, int major, int minor, int ctxProfileBits,
+                                                    boolean strictMatch, boolean withinGLVersionsMapping) {
     if(null!=this.gl && null!=glProcAddressTable && !force) {
-        return; // already done and not forced
+        return true; // already done and not forced
+    }
+
+    if ( 0 < major && !GLContext.isValidGLVersion(ctxProfileBits, major, minor) ) {
+        throw new GLException("Invalid GL Version Request "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
     }
 
     if(null==this.gl || !verifyInstance(gl.getGLProfile(), "Impl", this.gl)) {
-        setGL(createGL(getGLDrawable().getGLProfile()));
+        setGL( createGL( getGLDrawable().getGLProfile() ) );
     }
     updateGLXProcAddressTable();
 
-    initGLRendererStrings();
-    
-    if(!isCurrentContextHardwareRasterizer()) {
-        ctxProfileBits |= GLContext.CTX_IMPL_ACCEL_SOFT;
-    }    
     final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
     final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
-    
+    final int reqCtxProfileBits = ctxProfileBits;
+    final VersionNumber reqGLVersion = new VersionNumber(major, minor, 0);
+    final VersionNumber hasGLVersionByString;
+    {
+        final boolean initGLRendererAndGLVersionStringsOK = initGLRendererAndGLVersionStrings();
+        if( !initGLRendererAndGLVersionStringsOK ) {
+            final String errMsg = "Intialization of GL renderer strings failed. "+adevice+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null);
+            if( strictMatch ) {
+                // query mode .. simply fail
+                if(DEBUG) {
+                    System.err.println("Warning: setGLFunctionAvailability: "+errMsg);
+                }
+                return false;
+            } else {
+                // unusable GL context - non query mode - hard fail!
+                throw new GLException(errMsg);
+            }
+        } else {
+            hasGLVersionByString = getGLVersionNumber(ctxProfileBits, glVersion);
+            if(DEBUG) {
+                System.err.println(getThreadName() + ": GLContext.setGLFuncAvail: Given "+adevice+
+                                   " - "+GLContext.getGLVersion(major, minor, ctxProfileBits, glVersion)+
+                                   ", Number(Str) "+hasGLVersionByString);
+            }
+        }
+    }
+
+    final boolean isES = 0 != ( CTX_PROFILE_ES & ctxProfileBits );
+
+    //
+    // Validate GL version either by GL-Integer or GL-String
+    //
+    if (DEBUG) {
+        System.err.println(getThreadName() + ": GLContext.setGLFuncAvail: Pre version verification - expected "+GLContext.getGLVersion(major, minor, ctxProfileBits, null)+", strictMatch "+strictMatch+", glVersionsMapping " +withinGLVersionsMapping);
+    }
+
+    final boolean versionGL3IntOK;
+    {
+        // Validate the requested version w/ the GL-version from an integer query,
+        // as supported by GL [ES] >= 3.0 implementation.
+        final VersionNumber hasGLVersionByInt;
+        {
+            final int[] glIntMajor = new int[] { 0 }, glIntMinor = new int[] { 0 };
+            final boolean getGLIntVersionOK = getGLIntVersion(glIntMajor, glIntMinor);
+            if( !getGLIntVersionOK ) {
+                final String errMsg = "Fetching GL Integer Version failed. "+adevice+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null);
+                if( strictMatch ) {
+                    // query mode .. simply fail
+                    if(DEBUG) {
+                        System.err.println("Warning: setGLFunctionAvailability: "+errMsg);
+                    }
+                    return false;
+                } else {
+                    // unusable GL context - non query mode - hard fail!
+                    throw new GLException(errMsg);
+                }
+            }
+            hasGLVersionByInt = new VersionNumber(glIntMajor[0], glIntMinor[0], 0);
+        }
+        if (DEBUG) {
+            System.err.println(getThreadName() + ": GLContext.setGLFuncAvail: Version verification (Int): String "+glVersion+", Number(Int) "+hasGLVersionByInt);
+        }
+
+        // Only validate integer based version if:
+        //    - ctx >= 3.0 is requested _or_ string-version >= 3.0
+        //    - _and_ a valid int version was fetched,
+        // otherwise cont. w/ version-string method -> 3.0 > Version || Version > MAX!
+        //
+        if ( ( major >= 3 || hasGLVersionByString.compareTo(Version300) >= 0 ) &&
+             GLContext.isValidGLVersion(ctxProfileBits, hasGLVersionByInt.getMajor(), hasGLVersionByInt.getMinor()) ) {
+            // Strict Match (GLVersionMapping):
+            //   Relaxed match for versions ( !isES && major < 3 ) requests, last resort!
+            //   Otherwise:
+            //     - fail if hasVersion < reqVersion (desktop and ES)
+            //     - fail if ES major-version mismatch:
+            //       - request 1, >= 3 must be equal
+            //       - request 2 must be [2..3]
+            //
+            final int hasMajor = hasGLVersionByInt.getMajor();
+            if( strictMatch &&
+                ( ( ( isES || major >= 3 ) && hasGLVersionByInt.compareTo(reqGLVersion) < 0 ) ||
+                  ( isES &&
+                    (
+                      ( 2 == major && ( 2 > hasMajor || hasMajor > 3 ) ) ||  // 2      -> [2..3]
+                      ( ( 1 == major || 3 <= major ) && major != hasMajor )  // 1,3,.. -> equal
+                    )
+                  )
+                ) ) {
+                if(DEBUG) {
+                    System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: FAIL, GL version mismatch (Int): "+GLContext.getGLVersion(major, minor, ctxProfileBits, null)+" -> "+glVersion+", "+hasGLVersionByInt);
+                }
+                return false;
+            }
+            // Use returned GL version!
+            major = hasGLVersionByInt.getMajor();
+            minor = hasGLVersionByInt.getMinor();
+            versionGL3IntOK = true;
+        } else {
+            versionGL3IntOK = false;
+        }
+    }
+    final boolean versionValidated;
+
+    if( versionGL3IntOK ) {
+        versionValidated = true;
+    } else {
+        // Validate the requested version w/ the GL-version from the version string.
+        if (DEBUG) {
+            System.err.println(getThreadName() + ": GLContext.setGLFuncAvail: Version verification (String): String "+glVersion+", Number(Str) "+hasGLVersionByString);
+        }
+
+        // Only validate if a valid string version was fetched -> MIN > Version || Version > MAX!
+        if( null != hasGLVersionByString ) {
+            // Strict Match (GLVersionMapping):
+            //   Relaxed match for versions ( !isES && major < 3 ) requests, last resort!
+            //   Otherwise:
+            //     - fail if hasVersion < reqVersion (desktop and ES)
+            //     - fail if ES major-version mismatch:
+            //       - request 1, >= 3 must be equal
+            //       - request 2 must be [2..3]
+            //
+            final int hasMajor = hasGLVersionByString.getMajor();
+            if( strictMatch &&
+                ( ( ( isES || major >= 3 ) && hasGLVersionByString.compareTo(reqGLVersion) < 0 ) ||
+                  ( isES &&
+                    (
+                      ( 2 == major && ( 2 > hasMajor || hasMajor > 3 ) ) ||  // 2      -> [2..3]
+                      ( ( 1 == major || 3 <= major ) && major != hasMajor )  // 1,3,.. -> equal
+                    )
+                  )
+                ) ) {
+                if(DEBUG) {
+                    System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: FAIL, GL version mismatch (String): "+GLContext.getGLVersion(major, minor, ctxProfileBits, null)+" -> "+glVersion+", "+hasGLVersionByString);
+                }
+                return false;
+            }
+            if( strictMatch && !versionGL3IntOK && major >= 3 ) {
+                if(DEBUG) {
+                    System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: FAIL, GL3/ES3 version Int failed, String: "+GLContext.getGLVersion(major, minor, ctxProfileBits, null)+" -> "+glVersion+", "+hasGLVersionByString);
+                }
+                return false;
+            }
+            // Use returned GL version!
+            major = hasGLVersionByString.getMajor();
+            minor = hasGLVersionByString.getMinor();
+            versionValidated = true;
+        } else {
+            versionValidated = false;
+        }
+    }
+    if( strictMatch && !versionValidated ) {
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: FAIL, No GL version validation possible: "+GLContext.getGLVersion(major, minor, ctxProfileBits, null)+" -> "+glVersion);
+        }
+        return false;
+    }
+    if (DEBUG) {
+        System.err.println(getThreadName() + ": GLContext.setGLFuncAvail: Post version verification req "+
+                GLContext.getGLVersion(reqGLVersion.getMajor(), reqGLVersion.getMinor(), reqCtxProfileBits, null)+" -> has "+
+                GLContext.getGLVersion(major, minor, ctxProfileBits, null)+
+                ", strictMatch "+strictMatch+", versionValidated "+versionValidated+", versionGL3IntOK "+versionGL3IntOK);
+    }
+
+    if( major < 2 ) { // there is no ES2/3-compat for a profile w/ major < 2
+        ctxProfileBits &= ~ ( GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_ES3_COMPAT ) ;
+    }
+
+    final VersionNumberString vendorVersion = GLVersionNumber.createVendorVersion(glVersion);
+
+    setRendererQuirks(adevice, getDrawableImpl().getFactoryImpl(),
+                      reqGLVersion.getMajor(), reqGLVersion.getMinor(), reqCtxProfileBits,
+                      major, minor, ctxProfileBits, vendorVersion, withinGLVersionsMapping);
+
+    if( strictMatch && glRendererQuirks.exist(GLRendererQuirks.GLNonCompliant) ) {
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: FAIL, GL is not compliant: "+GLContext.getGLVersion(major, minor, ctxProfileBits, glVersion)+", "+glRenderer);
+        }
+        return false;
+    }
+
+    if(!isCurrentContextHardwareRasterizer()) {
+        ctxProfileBits |= GLContext.CTX_IMPL_ACCEL_SOFT;
+    }
+
     contextFQN = getContextFQN(adevice, major, minor, ctxProfileBits);
     if (DEBUG) {
-      System.err.println(getThreadName() + ": Context FQN: "+contextFQN+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
+        System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.0 validated FQN: "+contextFQN+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, glVersion));
     }
 
     //
@@ -1011,7 +1574,7 @@ public abstract class GLContextImpl extends GLContext {
     synchronized(mappedContextTypeObjectLock) {
         table = mappedGLProcAddress.get( contextFQN );
         if(null != table && !verifyInstance(gl.getGLProfile(), "ProcAddressTable", table)) {
-            throw new InternalError("GLContext GL ProcAddressTable mapped key("+contextFQN+" - " + GLContext.getGLVersion(major, minor, ctxProfileBits, null)+ 
+            throw new InternalError("GLContext GL ProcAddressTable mapped key("+contextFQN+" - " + GLContext.getGLVersion(major, minor, ctxProfileBits, null)+
                   ") -> "+ table.getClass().getName()+" not matching "+gl.getGLProfile().getGLImplBaseClassName());
         }
     }
@@ -1021,8 +1584,7 @@ public abstract class GLContextImpl extends GLContext {
             System.err.println(getThreadName() + ": GLContext GL ProcAddressTable reusing key("+contextFQN+") -> "+toHexString(table.hashCode()));
         }
     } else {
-        glProcAddressTable = (ProcAddressTable) createInstance(gl.getGLProfile(), "ProcAddressTable",
-                                                               new Class[] { FunctionAddressResolver.class } ,
+        glProcAddressTable = (ProcAddressTable) createInstance(gl.getGLProfile(), false,
                                                                new Object[] { new GLProcAddressResolver() } );
         resetProcAddressTable(getGLProcAddressTable());
         synchronized(mappedContextTypeObjectLock) {
@@ -1032,7 +1594,7 @@ public abstract class GLContextImpl extends GLContext {
             }
         }
     }
-    
+
     //
     // Update ExtensionAvailabilityCache
     //
@@ -1047,7 +1609,7 @@ public abstract class GLContextImpl extends GLContext {
         }
     } else {
         extensionAvailability = new ExtensionAvailabilityCache();
-        setContextVersion(major, minor, ctxProfileBits, false); // pre-set of GL version, required for extension cache usage
+        setContextVersion(major, minor, ctxProfileBits, vendorVersion, false); // pre-set of GL version, required for extension cache usage
         extensionAvailability.reset(this);
         synchronized(mappedContextTypeObjectLock) {
             mappedExtensionAvailabilityCache.put(contextFQN, extensionAvailability);
@@ -1055,116 +1617,430 @@ public abstract class GLContextImpl extends GLContext {
                 System.err.println(getThreadName() + ": GLContext GL ExtensionAvailabilityCache mapping key("+contextFQN+") -> "+toHexString(extensionAvailability.hashCode()) + " - entries: "+extensionAvailability.getTotalExtensionCount());
             }
         }
-    }    
-    if( isExtensionAvailable("GL_ARB_ES2_compatibility") ) {
+    }
+
+    if( isES ) {
+        if( major >= 3 ) {
+            ctxProfileBits |= CTX_IMPL_ES3_COMPAT | CTX_IMPL_ES2_COMPAT ;
+            ctxProfileBits |= CTX_IMPL_FBO;
+        } else if( major >= 2 ) {
+            ctxProfileBits |= CTX_IMPL_ES2_COMPAT;
+            ctxProfileBits |= CTX_IMPL_FBO;
+        }
+    } else if( ( major > 4 || major == 4 && minor >= 3 ) ||
+               ( ( major > 3 || major == 3 && minor >= 1 ) && isExtensionAvailable( GLExtensions.ARB_ES3_compatibility ) ) ) {
+        // See GLContext.isGLES3CompatibleAvailable(..)/isGLES3Compatible()
+        //   Includes [ GL &ge; 4.3, GL &ge; 3.1 w/ GL_ARB_ES3_compatibility and GLES3 ]
+        ctxProfileBits |= CTX_IMPL_ES3_COMPAT | CTX_IMPL_ES2_COMPAT ;
+        ctxProfileBits |= CTX_IMPL_FBO;
+    } else if( isExtensionAvailable( GLExtensions.ARB_ES2_compatibility ) ) {
         ctxProfileBits |= CTX_IMPL_ES2_COMPAT;
+        ctxProfileBits |= CTX_IMPL_FBO;
+    } else if( hasFBOImpl(major, ctxProfileBits, extensionAvailability) ) {
+        ctxProfileBits |= CTX_IMPL_FBO;
     }
-    
+
+    if( ( isES && major == 1 ) ||  isExtensionAvailable(GLExtensions.OES_single_precision) ) {
+        ctxProfileBits |= CTX_IMPL_FP32_COMPAT_API;
+    }
+
+    if(FORCE_NO_FBO_SUPPORT) {
+        ctxProfileBits &= ~CTX_IMPL_FBO ;
+    }
+
     //
     // Set GL Version (complete w/ version string)
     //
-    setContextVersion(major, minor, ctxProfileBits, true);
-    
+    setContextVersion(major, minor, ctxProfileBits, vendorVersion, true);
+
+    finalizeInit(gl);
+
     setDefaultSwapInterval();
+
+    final int glErrX = gl.glGetError(); // clear GL error, maybe caused by above operations
+
+    if(DEBUG) {
+        System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: OK "+contextFQN+" - "+GLContext.getGLVersion(ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions, null)+" - glErr "+toHexString(glErrX));
+    }
+    return true;
   }
 
-  protected final void removeCachedVersion(int major, int minor, int ctxProfileBits) {
+  private final void setRendererQuirks(final AbstractGraphicsDevice adevice, final GLDrawableFactoryImpl factory,
+                                       int reqMajor, int reqMinor, int reqCTP,
+                                       int major, int minor, int ctp, final VersionNumberString vendorVersion,
+                                       boolean withinGLVersionsMapping) {
+    int[] quirks = new int[GLRendererQuirks.COUNT + 1]; // + 1 ( NoFullFBOSupport )
+    int i = 0;
+
+    final String MesaSP = "Mesa ";
+    // final String MesaRendererAMDsp = " AMD ";
+    final String MesaRendererIntelsp = "Intel(R)";
+    final boolean hwAccel = 0 == ( ctp & GLContext.CTX_IMPL_ACCEL_SOFT );
+    final boolean compatCtx = 0 != ( ctp & GLContext.CTX_PROFILE_COMPAT );
+    final boolean esCtx = 0 != ( ctp & GLContext.CTX_PROFILE_ES );
+    final boolean isX11 = NativeWindowFactory.TYPE_X11 == NativeWindowFactory.getNativeWindowType(true);
+    final boolean isWindows = Platform.getOSType() == Platform.OSType.WINDOWS;
+    final boolean isDriverMesa = glRenderer.contains(MesaSP) || glRenderer.contains("Gallium ");
+    final boolean isDriverATICatalyst = !isDriverMesa && ( glVendor.contains("ATI Technologies") || glRenderer.startsWith("ATI ") );
+    final boolean isDriverNVIDIAGeForce = !isDriverMesa && ( glVendor.contains("NVIDIA Corporation") || glRenderer.contains("NVIDIA ") );
+
+    //
+    // General Quirks
+    //
+    if( esCtx ) {
+        if( 2 == reqMajor && 2 < major ) {
+            final int quirk = GLRendererQuirks.GLES3ViaEGLES2Config;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: ES req "+reqMajor+" and 2 < "+major);
+            }
+            quirks[i++] = quirk;
+            if( withinGLVersionsMapping ) {
+                // Thread safe due to single threaded initialization!
+                GLRendererQuirks.addStickyDeviceQuirks(adevice, quirks, i-1, 1);
+            } else {
+                // FIXME: Remove when moving EGL/ES to ARB ctx creation
+                synchronized(GLContextImpl.class) {
+                    GLRendererQuirks.addStickyDeviceQuirks(adevice, quirks, i-1, 1);
+                }
+            }
+        }
+    }
+
+    //
+    // OS related quirks
+    //
+    if( Platform.getOSType() == Platform.OSType.MACOS ) {
+        //
+        // OSX
+        //
+        {
+            final int quirk = GLRendererQuirks.NoOffscreenBitmap;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType());
+            }
+            quirks[i++] = quirk;
+        }
+        if( Platform.getOSVersionNumber().compareTo(Platform.OSXVersion.Mavericks) >= 0 && 3==reqMajor && 4==major ) {
+            final int quirk = GLRendererQuirks.GL4NeedsGL3Request;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType()+", OS Version "+Platform.getOSVersionNumber()+", req "+reqMajor+"."+reqMinor);
+            }
+            quirks[i++] = quirk;
+            if( withinGLVersionsMapping ) {
+                // Thread safe due to single threaded initialization!
+                GLRendererQuirks.addStickyDeviceQuirks(adevice, quirks, i-1, 1);
+            }
+        }
+        if( isDriverNVIDIAGeForce ) {
+            final VersionNumber osxVersionNVFlushClean = new VersionNumber(10,7,3); // < OSX 10.7.3 w/ NV needs glFlush
+            if( Platform.getOSVersionNumber().compareTo(osxVersionNVFlushClean) < 0 ) {
+                final int quirk = GLRendererQuirks.GLFlushBeforeRelease;
+                if(DEBUG) {
+                    System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType()+", OS Version "+Platform.getOSVersionNumber()+", Renderer "+glRenderer);
+                }
+                quirks[i++] = quirk;
+            }
+            if( Platform.getOSVersionNumber().compareTo(Platform.OSXVersion.Lion) < 0 ) { // < OSX 10.7.0 w/ NV has unstable GLSL
+                final int quirk = GLRendererQuirks.GLSLNonCompliant;
+                if(DEBUG) {
+                    System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType()+", OS Version "+Platform.getOSVersionNumber()+", Renderer "+glRenderer);
+                }
+                quirks[i++] = quirk;
+            }
+        }
+    } else if( isWindows ) {
+        //
+        // WINDOWS
+        //
+        {
+            final int quirk = GLRendererQuirks.NoDoubleBufferedBitmap;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType());
+            }
+            quirks[i++] = quirk;
+        }
+
+        if( isDriverATICatalyst ) {
+            final VersionNumber winXPVersionNumber = new VersionNumber ( 5, 1, 0);
+            final VersionNumber amdSafeMobilityVersion = new VersionNumber(12, 102, 3);
+
+            if ( vendorVersion.compareTo(amdSafeMobilityVersion) < 0 ) { // includes: vendorVersion.isZero()
+                final int quirk = GLRendererQuirks.NeedCurrCtx4ARBCreateContext;
+                if(DEBUG) {
+                    System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType()+", [Vendor "+glVendor+" or Renderer "+glRenderer+"], driverVersion "+vendorVersion);
+                }
+                quirks[i++] = quirk;
+            }
+
+            if( Platform.getOSVersionNumber().compareTo(winXPVersionNumber) <= 0 ) {
+                final int quirk = GLRendererQuirks.NeedCurrCtx4ARBPixFmtQueries;
+                if(DEBUG) {
+                    System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS-Version "+Platform.getOSType()+" "+Platform.getOSVersionNumber()+", [Vendor "+glVendor+" or Renderer "+glRenderer+"]");
+                }
+                quirks[i++] = quirk;
+            }
+        }
+    } else if( Platform.OSType.ANDROID == Platform.getOSType() ) {
+        //
+        // ANDROID
+        //
+        // Renderer related quirks, may also involve OS
+        if( glRenderer.contains("PowerVR") ) {
+            final int quirk = GLRendererQuirks.NoSetSwapInterval;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType() + ", Renderer " + glRenderer);
+            }
+            quirks[i++] = quirk;
+        }
+        if( glRenderer.contains("Immersion.16") ) {
+          final int quirk = GLRendererQuirks.GLSharedContextBuggy;
+          if(DEBUG) {
+              System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType() + ", Renderer " + glRenderer);
+          }
+          quirks[i++] = quirk;
+        }
+    }
+
+    //
+    // Windowing Toolkit related quirks
+    //
+    if( isX11 ) {
+        //
+        // X11
+        //
+        {
+            //
+            // Quirk: DontCloseX11Display
+            //
+            final int quirk = GLRendererQuirks.DontCloseX11Display;
+            if( glRenderer.contains(MesaSP) ) {
+                if ( glRenderer.contains("X11") && vendorVersion.compareTo(Version800) < 0 ) {
+                    if(DEBUG) {
+                        System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: X11 Renderer=" + glRenderer + ", Version=[vendor " + vendorVersion + ", GL " + glVersion+"]");
+                    }
+                    quirks[i++] = quirk;
+                }
+            } else if( isDriverATICatalyst ) {
+                {
+                    if(DEBUG) {
+                        System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: X11 Renderer=" + glRenderer);
+                    }
+                    quirks[i++] = quirk;
+                }
+            } else if( jogamp.nativewindow.x11.X11Util.getMarkAllDisplaysUnclosable() ) {
+                {
+                    if(DEBUG) {
+                        System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: X11Util Downstream");
+                    }
+                    quirks[i++] = quirk;
+                }
+            }
+        }
+    }
+
+
+    //
+    // RENDERER related quirks
+    //
+    if( isDriverMesa ) {
+        final VersionNumber mesaIntelBuggySharedCtx921 = new VersionNumber(9, 2, 1);
+
+        {
+            final int quirk = GLRendererQuirks.NoSetSwapIntervalPostRetarget;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: Renderer " + glRenderer);
+            }
+            quirks[i++] = quirk;
+        }
+        if( hwAccel /* glRenderer.contains( MesaRendererIntelsp ) || glRenderer.contains( MesaRendererAMDsp ) */ )
+        {
+            final int quirk = GLRendererQuirks.NoDoubleBufferedPBuffer;
+            if(DEBUG) {
+                System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: Renderer " + glRenderer);
+            }
+            quirks[i++] = quirk;
+        }
+        if (compatCtx && (major > 3 || (major == 3 && minor >= 1))) {
+          // FIXME: Apply vendor version constraints!
+          final int quirk = GLRendererQuirks.GLNonCompliant;
+          if(DEBUG) {
+              System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: Renderer " + glRenderer);
+          }
+          quirks[i++] = quirk;
+        }
+        if( glRenderer.contains( MesaRendererIntelsp ) &&
+            vendorVersion.compareTo(mesaIntelBuggySharedCtx921) >= 0 && isX11 ) {
+          final int quirk = GLRendererQuirks.GLSharedContextBuggy;
+          if(DEBUG) {
+              System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: X11 / Renderer " + glRenderer + " / Mesa-Version "+vendorVersion);
+          }
+          quirks[i++] = quirk;
+        }
+        if( isWindows && glRenderer.contains("SVGA3D") ) {
+            final VersionNumber mesaSafeFBOVersion = new VersionNumber(8, 0, 0);
+            if ( vendorVersion.compareTo(mesaSafeFBOVersion) < 0 ) { // includes: vendorVersion.isZero()
+                final int quirk = GLRendererQuirks.NoFullFBOSupport;
+                if(DEBUG) {
+                    System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: OS "+Platform.getOSType() + " / Renderer " + glRenderer + " / Mesa-Version "+vendorVersion);
+                }
+                quirks[i++] = quirk;
+            }
+        }
+    }
+
+    //
+    // Property related quirks
+    //
+    if( FORCE_MIN_FBO_SUPPORT ) {
+        final int quirk = GLRendererQuirks.NoFullFBOSupport;
+        if(DEBUG) {
+            System.err.println("Quirk: "+GLRendererQuirks.toString(quirk)+": cause: property");
+        }
+        quirks[i++] = quirk;
+    }
+
+    glRendererQuirks = new GLRendererQuirks(quirks, 0, i);
+    if(DEBUG) {
+        System.err.println("Quirks local.0: "+glRendererQuirks);
+    }
+    {
+        // Merge sticky quirks, thread safe due to single threaded initialization!
+        GLRendererQuirks.pushStickyDeviceQuirks(adevice, glRendererQuirks);
+
+        final AbstractGraphicsDevice factoryDefaultDevice = factory.getDefaultDevice();
+        if( !GLRendererQuirks.areSameStickyDevice(factoryDefaultDevice, adevice) ) {
+            GLRendererQuirks.pushStickyDeviceQuirks(factoryDefaultDevice, glRendererQuirks);
+        }
+        if( esCtx ) {
+            final AbstractGraphicsDevice eglFactoryDefaultDevice = GLDrawableFactory.getEGLFactory().getDefaultDevice();
+            if( !GLRendererQuirks.areSameStickyDevice(eglFactoryDefaultDevice, adevice) &&
+                !GLRendererQuirks.areSameStickyDevice(eglFactoryDefaultDevice, factoryDefaultDevice) ) {
+                GLRendererQuirks.pushStickyDeviceQuirks(eglFactoryDefaultDevice, glRendererQuirks);
+            }
+        }
+    }
+    if(DEBUG) {
+        System.err.println("Quirks local.X: "+glRendererQuirks);
+        System.err.println("Quirks sticky on "+adevice+": "+GLRendererQuirks.getStickyDeviceQuirks(adevice));
+    }
+  }
+
+  private static final boolean hasFBOImpl(int major, int ctp, ExtensionAvailabilityCache extCache) {
+    return ( 0 != (ctp & CTX_PROFILE_ES) && major >= 2 ) ||   // ES >= 2.0
+
+           major >= 3 ||                                                 // any >= 3.0 GL ctx (core, compat and ES)
+
+           ( null != extCache &&
+
+               extCache.isExtensionAvailable(GLExtensions.ARB_ES2_compatibility)  ||         // ES 2.0 compatible
+
+               extCache.isExtensionAvailable(GLExtensions.ARB_framebuffer_object) ||         // ARB_framebuffer_object
+
+               extCache.isExtensionAvailable(GLExtensions.EXT_framebuffer_object) ||         // EXT_framebuffer_object
+
+               extCache.isExtensionAvailable(GLExtensions.OES_framebuffer_object) ) ;        // OES_framebuffer_object excluded
+  }
+
+  private final void removeCachedVersion(int major, int minor, int ctxProfileBits) {
     if(!isCurrentContextHardwareRasterizer()) {
         ctxProfileBits |= GLContext.CTX_IMPL_ACCEL_SOFT;
     }
     final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
     final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
-    
+
     contextFQN = getContextFQN(adevice, major, minor, ctxProfileBits);
     if (DEBUG) {
       System.err.println(getThreadName() + ": RM Context FQN: "+contextFQN+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
     }
 
     synchronized(mappedContextTypeObjectLock) {
-        ProcAddressTable table = mappedGLProcAddress.remove( contextFQN );
+        final ProcAddressTable table = mappedGLProcAddress.remove( contextFQN );
         if(DEBUG) {
-            System.err.println(getThreadName() + ": RM GLContext GL ProcAddressTable mapping key("+contextFQN+") -> "+table.hashCode());
+            final int hc = null != table ? table.hashCode() : 0;
+            System.err.println(getThreadName() + ": RM GLContext GL ProcAddressTable mapping key("+contextFQN+") -> "+toHexString(hc));
         }
     }
 
     synchronized(mappedContextTypeObjectLock) {
-        ExtensionAvailabilityCache  eCache = mappedExtensionAvailabilityCache.remove( contextFQN );
+        final ExtensionAvailabilityCache  eCache = mappedExtensionAvailabilityCache.remove( contextFQN );
         if(DEBUG) {
-            System.err.println(getThreadName() + ": RM GLContext GL ExtensionAvailabilityCache mapping key("+contextFQN+") -> "+eCache.hashCode());
+            final int hc = null != eCache ? eCache.hashCode() : 0;
+            System.err.println(getThreadName() + ": RM GLContext GL ExtensionAvailabilityCache mapping key("+contextFQN+") -> "+toHexString(hc));
         }
     }
   }
 
   private final boolean isCurrentContextHardwareRasterizer()  {
     boolean isHardwareRasterizer = true;
-    
+
     if(!drawable.getChosenGLCapabilities().getHardwareAccelerated()) {
         isHardwareRasterizer = false;
     } else {
-        isHardwareRasterizer = ! ( glRendererLowerCase.contains("software") /* Mesa3D */  ||
-                                   glRendererLowerCase.contains("mesa x11") /* Mesa3D*/   ||
+        isHardwareRasterizer = ! ( glRendererLowerCase.contains("software") /* Mesa3D, Apple */ ||
+                                   glRendererLowerCase.contains("mesa x11") /* Mesa3D  */ ||
                                    glRendererLowerCase.contains("softpipe") /* Gallium */ ||
-                                   glRendererLowerCase.contains("llvmpipe") /* Gallium */                                
+                                   glRendererLowerCase.contains("llvmpipe") /* Gallium */
                                  );
     }
     return isHardwareRasterizer;
   }
-  
+
   /**
    * Updates the platform's 'GLX' function cache
    */
   protected abstract void updateGLXProcAddressTable();
 
   protected abstract StringBuilder getPlatformExtensionsStringImpl();
-  
+
+  @Override
   public final boolean isFunctionAvailable(String glFunctionName) {
     // Check GL 1st (cached)
     if(null!=glProcAddressTable) { // null if this context wasn't not created
         try {
-            if(0!=glProcAddressTable.getAddressFor(glFunctionName)) {
+            if( glProcAddressTable.isFunctionAvailable( glFunctionName ) ) {
                 return true;
             }
         } catch (Exception e) {}
     }
 
     // Check platform extensions 2nd (cached) - context had to be enabled once
-    final ProcAddressTable pTable = getPlatformExtProcAddressTable(); 
-    if(null!=pTable) { 
+    final ProcAddressTable pTable = getPlatformExtProcAddressTable();
+    if(null!=pTable) {
         try {
-            if(0!=pTable.getAddressFor(glFunctionName)) {
+            if( pTable.isFunctionAvailable( glFunctionName ) ) {
                 return true;
             }
         } catch (Exception e) {}
     }
 
     // dynamic function lookup at last incl name aliasing (not cached)
-    DynamicLookupHelper dynLookup = getDrawableImpl().getGLDynamicLookupHelper();
-    String tmpBase = GLExtensionNames.normalizeVEN(GLExtensionNames.normalizeARB(glFunctionName, true), true);
-    long addr = 0;
-    int  variants = GLExtensionNames.getFuncNamePermutationNumber(tmpBase);
-    for(int i = 0; 0==addr && i < variants; i++) {
-        String tmp = GLExtensionNames.getFuncNamePermutation(tmpBase, i);
+    final DynamicLookupHelper dynLookup = getDrawableImpl().getGLDynamicLookupHelper();
+    final String tmpBase = GLNameResolver.normalizeVEN(GLNameResolver.normalizeARB(glFunctionName, true), true);
+    boolean res = false;
+    int  variants = GLNameResolver.getFuncNamePermutationNumber(tmpBase);
+    for(int i = 0; !res && i < variants; i++) {
+        final String tmp = GLNameResolver.getFuncNamePermutation(tmpBase, i);
         try {
-            addr = dynLookup.dynamicLookupFunction(tmp);
+            res = dynLookup.isFunctionAvailable(tmp);
         } catch (Exception e) { }
     }
-    if(0!=addr) {
-        return true;
-    }
-    return false;
+    return res;
   }
 
-  public boolean isExtensionAvailable(String glExtensionName) {
+  @Override
+  public final boolean isExtensionAvailable(String glExtensionName) {
       if(null!=extensionAvailability) {
         return extensionAvailability.isExtensionAvailable(mapToRealGLExtensionName(glExtensionName));
       }
       return false;
   }
 
+  @Override
   public final int getPlatformExtensionCount() {
       return null != extensionAvailability ? extensionAvailability.getPlatformExtensionCount() : 0;
   }
-  
+
+  @Override
   public final String getPlatformExtensionsString() {
       if(null!=extensionAvailability) {
         return extensionAvailability.getPlatformExtensionsString();
@@ -1172,10 +2048,12 @@ public abstract class GLContextImpl extends GLContext {
       return null;
   }
 
+  @Override
   public final int getGLExtensionCount() {
       return null != extensionAvailability ? extensionAvailability.getGLExtensionCount() : 0;
   }
-  
+
+  @Override
   public final String getGLExtensionsString() {
       if(null!=extensionAvailability) {
         return extensionAvailability.getGLExtensionsString();
@@ -1189,15 +2067,15 @@ public abstract class GLContextImpl extends GLContext {
       }
       return false;
   }
-  
+
   protected static String getContextFQN(AbstractGraphicsDevice device, int major, int minor, int ctxProfileBits) {
       // remove non-key values
-      ctxProfileBits &= ~( GLContext.CTX_OPTION_DEBUG | GLContext.CTX_IMPL_ES2_COMPAT ) ; 
-            
+      ctxProfileBits &= CTX_IMPL_CACHE_MASK;
+
       return device.getUniqueID() + "-" + toHexString(composeBits(major, minor, ctxProfileBits));
   }
 
-  protected String getContextFQN() {
+  protected final String getContextFQN() {
       return contextFQN;
   }
 
@@ -1208,32 +2086,63 @@ public abstract class GLContextImpl extends GLContext {
     throw new GLException("Not supported on non-pbuffer contexts");
   }
 
-  /** On some platforms the mismatch between OpenGL's coordinate
-      system (origin at bottom left) and the window system's
-      coordinate system (origin at top left) necessitates a vertical
-      flip of pixels read from offscreen contexts. */
-  public abstract boolean offscreenImageNeedsVerticalFlip();
+  @Override
+  public int getDefaultPixelDataType() {
+      evalPixelDataType();
+      return pixelDataType;
+  }
 
-  /** Only called for offscreen contexts; needed by glReadPixels */
-  public abstract int getOffscreenContextPixelDataType();
+  @Override
+  public int getDefaultPixelDataFormat() {
+      evalPixelDataType();
+      return pixelDataFormat;
+  }
 
+  private final void evalPixelDataType() {
+    if(!pixelDataEvaluated) {
+        synchronized(this) {
+            if(!pixelDataEvaluated) {
+                boolean ok = false;
+                /* if(isGL2GL3() && 3 == components) {
+                    pixelDataInternalFormat=GL.GL_RGB;
+                    pixelDataFormat=GL.GL_RGB;
+                    pixelDataType = GL.GL_UNSIGNED_BYTE;
+                    ok = true;
+                } else */ if( isGLES2Compatible() || isExtensionAvailable(GLExtensions.OES_read_format) ) {
+                    final int[] glImplColorReadVals = new int[] { 0, 0 };
+                    gl.glGetIntegerv(GL.GL_IMPLEMENTATION_COLOR_READ_FORMAT, glImplColorReadVals, 0);
+                    gl.glGetIntegerv(GL.GL_IMPLEMENTATION_COLOR_READ_TYPE, glImplColorReadVals, 1);
+                    // pixelDataInternalFormat = (4 == components) ? GL.GL_RGBA : GL.GL_RGB;
+                    pixelDataFormat = glImplColorReadVals[0];
+                    pixelDataType = glImplColorReadVals[1];
+                    ok = 0 != pixelDataFormat && 0 != pixelDataType;
+                }
+                if( !ok ) {
+                    // RGBA read is safe for all GL profiles
+                    // pixelDataInternalFormat = (4 == components) ? GL.GL_RGBA : GL.GL_RGB;
+                    pixelDataFormat=GL.GL_RGBA;
+                    pixelDataType = GL.GL_UNSIGNED_BYTE;
+                }
+                // TODO: Consider:
+                // return gl.isGL2GL3()?GL2GL3.GL_UNSIGNED_INT_8_8_8_8_REV:GL.GL_UNSIGNED_SHORT_5_5_5_1;
+                pixelDataEvaluated = true;
+            }
+        }
+    }
+  }
 
   //----------------------------------------------------------------------
   // Helpers for buffer object optimizations
-  
-  public void setBufferSizeTracker(GLBufferSizeTracker bufferSizeTracker) {
-    this.bufferSizeTracker = bufferSizeTracker;
-  }
 
-  public GLBufferSizeTracker getBufferSizeTracker() {
-    return bufferSizeTracker;
+  public final GLBufferObjectTracker getBufferObjectTracker() {
+    return bufferObjectTracker;
   }
 
-  public GLBufferStateTracker getBufferStateTracker() {
+  public final GLBufferStateTracker getBufferStateTracker() {
     return bufferStateTracker;
   }
 
-  public GLStateTracker getGLStateTracker() {
+  public final GLStateTracker getGLStateTracker() {
     return glStateTracker;
   }
 
@@ -1242,38 +2151,123 @@ public abstract class GLContextImpl extends GLContext {
   // current on the OpenGL worker thread
   //
 
-  public boolean hasWaiters() {
+  /**
+   * Returns true if the given thread is owner, otherwise false.
+   * <p>
+   * Method exists merely for code validation of {@link #isCurrent()}.
+   * </p>
+   */
+  public final boolean isOwner(Thread thread) {
+      return lock.isOwner(thread);
+  }
+
+  /**
+   * Returns true if there are other threads waiting for this GLContext to {@link #makeCurrent()}, otherwise false.
+   * <p>
+   * Since method does not perform any synchronization, accurate result are returned if lock is hold - only.
+   * </p>
+   */
+  public final boolean hasWaiters() {
     return lock.getQueueLength()>0;
   }
-  
+
+  /**
+   * Returns the number of hold locks. See {@link RecursiveLock#getHoldCount()} for semantics.
+   * <p>
+   * Since method does not perform any synchronization, accurate result are returned if lock is hold - only.
+   * </p>
+   */
+  public final int getLockCount() {
+      return lock.getHoldCount();
+  }
+
+  //---------------------------------------------------------------------------
+  // Special FBO hook
+  //
+
+  /**
+   * Tracks {@link GL#GL_FRAMEBUFFER}, {@link GL2GL3#GL_DRAW_FRAMEBUFFER} and {@link GL2GL3#GL_READ_FRAMEBUFFER}
+   * to be returned via {@link #getBoundFramebuffer(int)}.
+   *
+   * <p>Invoked by {@link GL#glBindFramebuffer(int, int)}. </p>
+   *
+   * <p>Assumes valid <code>framebufferName</code> range of [0..{@link Integer#MAX_VALUE}]</p>
+   *
+   * <p>Does not throw an exception if <code>target</code> is unknown or <code>framebufferName</code> invalid.</p>
+   */
+  public final void setBoundFramebuffer(int target, int framebufferName) {
+      if(0 > framebufferName) {
+          return; // ignore invalid name
+      }
+      switch(target) {
+          case GL.GL_FRAMEBUFFER:
+              boundFBOTarget[0] = framebufferName; // draw
+              boundFBOTarget[1] = framebufferName; // read
+              break;
+          case GL2GL3.GL_DRAW_FRAMEBUFFER:
+              boundFBOTarget[0] = framebufferName; // draw
+              break;
+          case GL2GL3.GL_READ_FRAMEBUFFER:
+              boundFBOTarget[1] = framebufferName; // read
+              break;
+          default: // ignore untracked target
+      }
+  }
+  @Override
+  public final int getBoundFramebuffer(int target) {
+      switch(target) {
+          case GL.GL_FRAMEBUFFER:
+          case GL2GL3.GL_DRAW_FRAMEBUFFER:
+              return boundFBOTarget[0]; // draw
+          case GL2GL3.GL_READ_FRAMEBUFFER:
+              return boundFBOTarget[1]; // read
+          default:
+              throw new InternalError("Invalid FBO target name: "+toHexString(target));
+      }
+  }
+
+  @Override
+  public final int getDefaultDrawFramebuffer() { return drawable.getDefaultDrawFramebuffer(); }
+  @Override
+  public final int getDefaultReadFramebuffer() { return drawable.getDefaultReadFramebuffer(); }
+  @Override
+  public final int getDefaultReadBuffer() { return drawable.getDefaultReadBuffer(gl, drawableRead != drawable); }
+
   //---------------------------------------------------------------------------
   // GL_ARB_debug_output, GL_AMD_debug_output helpers
   //
 
+  @Override
   public final String getGLDebugMessageExtension() {
       return glDebugHandler.getExtension();
   }
 
+  @Override
   public final boolean isGLDebugMessageEnabled() {
       return glDebugHandler.isEnabled();
   }
-  
+
+  @Override
   public final int getContextCreationFlags() {
-      return additionalCtxCreationFlags;                
+      return additionalCtxCreationFlags;
   }
 
+  @Override
   public final void setContextCreationFlags(int flags) {
       if(!isCreated()) {
           additionalCtxCreationFlags = flags & GLContext.CTX_OPTION_DEBUG;
       }
   }
-  
-  public final boolean isGLDebugSynchronous() { return glDebugHandler.isSynchronous(); }     
-  
+
+  @Override
+  public final boolean isGLDebugSynchronous() { return glDebugHandler.isSynchronous(); }
+
+  @Override
   public final void setGLDebugSynchronous(boolean synchronous) {
       glDebugHandler.setSynchronous(synchronous);
   }
-  
+
+  @Override
   public final void enableGLDebugMessage(boolean enable) throws GLException {
       if(!isCreated()) {
           if(enable) {
@@ -1286,40 +2280,48 @@ public abstract class GLContextImpl extends GLContext {
           glDebugHandler.enable(enable);
       }
   }
-  
-  public final void addGLDebugListener(GLDebugListener listener) { 
+
+  @Override
+  public final void addGLDebugListener(GLDebugListener listener) {
       glDebugHandler.addListener(listener);
   }
-  
+
+  @Override
   public final void removeGLDebugListener(GLDebugListener listener) {
       glDebugHandler.removeListener(listener);
-  }    
-  
+  }
+
+  @Override
   public final void glDebugMessageControl(int source, int type, int severity, int count, IntBuffer ids, boolean enabled) {
       if(glDebugHandler.isExtensionARB()) {
-          gl.getGL2GL3().glDebugMessageControlARB(source, type, severity, count, ids, enabled);
+          gl.getGL2GL3().glDebugMessageControl(source, type, severity, count, ids, enabled);
       } else if(glDebugHandler.isExtensionAMD()) {
           gl.getGL2GL3().glDebugMessageEnableAMD(GLDebugMessage.translateARB2AMDCategory(source, type), severity, count, ids, enabled);
-      }      
+      }
   }
-  
+
+  @Override
   public final void glDebugMessageControl(int source, int type, int severity, int count, int[] ids, int ids_offset, boolean enabled) {
       if(glDebugHandler.isExtensionARB()) {
-          gl.getGL2GL3().glDebugMessageControlARB(source, type, severity, count, ids, ids_offset, enabled);
+          gl.getGL2GL3().glDebugMessageControl(source, type, severity, count, ids, ids_offset, enabled);
       } else if(glDebugHandler.isExtensionAMD()) {
           gl.getGL2GL3().glDebugMessageEnableAMD(GLDebugMessage.translateARB2AMDCategory(source, type), severity, count, ids, ids_offset, enabled);
       }
   }
-  
+
+  @Override
   public final void glDebugMessageInsert(int source, int type, int id, int severity, String buf) {
       final int len = (null != buf) ? buf.length() : 0;
       if(glDebugHandler.isExtensionARB()) {
-          gl.getGL2GL3().glDebugMessageInsertARB(source, type, id, severity, len, buf);
+          gl.getGL2GL3().glDebugMessageInsert(source, type, id, severity, len, buf);
       } else if(glDebugHandler.isExtensionAMD()) {
           gl.getGL2GL3().glDebugMessageInsertAMD(GLDebugMessage.translateARB2AMDCategory(source, type), severity, id, len, buf);
-      }      
+      }
   }
-  
+
   /** Internal bootstraping glGetString(GL_RENDERER) */
-  protected static native String glGetStringInt(int name, long procAddress);
+  private static native String glGetStringInt(int name, long procAddress);
+
+  /** Internal bootstraping glGetIntegerv(..) for version */
+  private static native void glGetIntegervInt(int pname, int[] params, int params_offset, long procAddress);
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLContextShareSet.java b/src/jogl/classes/jogamp/opengl/GLContextShareSet.java
index b7acc0dff..c057c904c 100644
--- a/src/jogl/classes/jogamp/opengl/GLContextShareSet.java
+++ b/src/jogl/classes/jogamp/opengl/GLContextShareSet.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2011 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,18 +29,19 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl;
 
-import java.util.HashMap;
+import java.util.ArrayList;
+import java.util.IdentityHashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Set;
@@ -55,39 +56,39 @@ import javax.media.opengl.GLException;
 
 public class GLContextShareSet {
   private static final boolean DEBUG = GLContextImpl.DEBUG;
-  
+
   // This class is implemented using a HashMap which maps from all shared contexts
   // to a share set, containing all shared contexts itself.
 
-  private static final Map<GLContext, ShareSet> shareMap = new HashMap<GLContext, ShareSet>();
+  private static final Map<GLContext, ShareSet> shareMap = new IdentityHashMap<GLContext, ShareSet>();
   private static final Object dummyValue = new Object();
 
   private static class ShareSet {
-    private Map<GLContext, Object> allShares       = new HashMap<GLContext, Object>();
-    private Map<GLContext, Object> createdShares   = new HashMap<GLContext, Object>();
-    private Map<GLContext, Object> destroyedShares = new HashMap<GLContext, Object>();
+    private final Map<GLContext, Object> allShares       = new IdentityHashMap<GLContext, Object>();
+    private final Map<GLContext, Object> createdShares   = new IdentityHashMap<GLContext, Object>();
+    private final Map<GLContext, Object> destroyedShares = new IdentityHashMap<GLContext, Object>();
 
-    public void add(GLContext ctx) {
+    public void add(final GLContext ctx) {
       if (allShares.put(ctx, dummyValue) == null) {
         if (ctx.isCreated()) {
           createdShares.put(ctx, dummyValue);
         } else {
           destroyedShares.put(ctx, dummyValue);
         }
-      }      
+      }
     }
 
     public Set<GLContext> getCreatedShares() {
         return createdShares.keySet();
     }
-    
+
     public Set<GLContext> getDestroyedShares() {
         return destroyedShares.keySet();
     }
-    
-    public GLContext getCreatedShare(GLContext ignore) {
-      for (Iterator<GLContext> iter = createdShares.keySet().iterator(); iter.hasNext(); ) {
-        GLContext ctx = iter.next();
+
+    public GLContext getCreatedShare(final GLContext ignore) {
+      for (final Iterator<GLContext> iter = createdShares.keySet().iterator(); iter.hasNext(); ) {
+        final GLContext ctx = iter.next();
         if (ctx != ignore) {
           return ctx;
         }
@@ -95,21 +96,21 @@ public class GLContextShareSet {
       return null;
     }
 
-    public void contextCreated(GLContext ctx) {
-      Object res = destroyedShares.remove(ctx);
+    public void contextCreated(final GLContext ctx) {
+      final Object res = destroyedShares.remove(ctx);
       assert res != null : "State of ShareSet corrupted; thought context " +
         ctx + " should have been in destroyed set but wasn't";
-      res = createdShares.put(ctx, dummyValue);
-      assert res == null : "State of ShareSet corrupted; thought context " +
+      final Object res2 = createdShares.put(ctx, dummyValue);
+      assert res2 == null : "State of ShareSet corrupted; thought context " +
         ctx + " shouldn't have been in created set but was";
     }
 
-    public void contextDestroyed(GLContext ctx) {
-      Object res = createdShares.remove(ctx);
+    public void contextDestroyed(final GLContext ctx) {
+      final Object res = createdShares.remove(ctx);
       assert res != null : "State of ShareSet corrupted; thought context " +
         ctx + " should have been in created set but wasn't";
-      res = destroyedShares.put(ctx, dummyValue);
-      assert res == null : "State of ShareSet corrupted; thought context " +
+      final Object res2 = destroyedShares.put(ctx, dummyValue);
+      assert res2 == null : "State of ShareSet corrupted; thought context " +
         ctx + " shouldn't have been in destroyed set but was";
     }
   }
@@ -117,7 +118,7 @@ public class GLContextShareSet {
   /** Indicate that contexts <code>share1</code> and
       <code>share2</code> will share textures and display lists. Both
       must be non-null. */
-  public static synchronized void registerSharing(GLContext share1, GLContext share2) {
+  public static synchronized void registerSharing(final GLContext share1, final GLContext share2) {
     if (share1 == null || share2 == null) {
       throw new IllegalArgumentException("Both share1 and share2 must be non-null");
     }
@@ -133,12 +134,12 @@ public class GLContextShareSet {
     addEntry(share1, share);
     addEntry(share2, share);
     if (DEBUG) {
-      System.err.println("GLContextShareSet: registereSharing: 1: " + 
+      System.err.println("GLContextShareSet: registereSharing: 1: " +
               toHexString(share1.getHandle()) + ", 2: " + toHexString(share2.getHandle()));
-    }                  
+    }
   }
 
-  public static synchronized void unregisterSharing(GLContext lastContext) {
+  public static synchronized void unregisterSharing(final GLContext lastContext) {
     if (lastContext == null) {
       throw new IllegalArgumentException("Last context is null");
     }
@@ -155,9 +156,9 @@ public class GLContextShareSet {
         throw new GLException("Last context's share set contains no destroyed context");
     }
     if (DEBUG) {
-      System.err.println("GLContextShareSet: unregisterSharing: " + 
+      System.err.println("GLContextShareSet: unregisterSharing: " +
               toHexString(lastContext.getHandle())+", entries: "+s.size());
-    }                  
+    }
     for(Iterator<GLContext> iter = s.iterator() ; iter.hasNext() ; ) {
         GLContext ctx = iter.next();
         if(null == removeEntry(ctx)) {
@@ -165,61 +166,85 @@ public class GLContextShareSet {
         }
     }
   }
-  
-  private static synchronized Set<GLContext> getCreatedSharedImpl(GLContext context) {
+
+  /** Returns true if the given GLContext is shared, otherwise false. */
+  public static synchronized boolean isShared(final GLContext context) {
     if (context == null) {
       throw new IllegalArgumentException("context is null");
     }
     final ShareSet share = entryFor(context);
-    if (share != null) {
-        return share.getCreatedShares();
+    return share != null;
+  }
+
+  /** Returns one created GLContext shared with the given <code>context</code>, otherwise return <code>null</code>. */
+  public static synchronized GLContext getCreatedShare(final GLContext context) {
+    final ShareSet share = entryFor(context);
+    if (share == null) {
+      return null;
     }
-    return null;    
+    return share.getCreatedShare(context);
   }
-  
-  public static synchronized boolean isShared(GLContext context) {
+
+  private static synchronized Set<GLContext> getCreatedSharesImpl(final GLContext context) {
     if (context == null) {
       throw new IllegalArgumentException("context is null");
     }
     final ShareSet share = entryFor(context);
-    return share != null;
-  }
-  
-  public static synchronized boolean hasCreatedSharedLeft(GLContext context) {
-      final Set<GLContext> s = getCreatedSharedImpl(context);
-      return null != s && s.size()>0 ;
-  }
-  
-  /** currently not used ..
-  public static synchronized Set<GLContext> getCreatedShared(GLContext context) {
-    final Set<GLContext> s = getCreatedSharedImpl(context);
-    if (s == null) {
-      throw new GLException("context is unknown: "+context);
+    if (share != null) {
+        return share.getCreatedShares();
     }
-    return s;
+    return null;
   }
-    
-  public static synchronized Set<GLContext> getDestroyedShared(GLContext context) {
+  private static synchronized Set<GLContext> getDestroyedSharesImpl(final GLContext context) {
     if (context == null) {
       throw new IllegalArgumentException("context is null");
     }
-    ShareSet share = entryFor(context);
-    if (share == null) {
-      throw new GLException("context is unknown: "+context);
-    }
-    return share.getDestroyedShares();
-  } */
-    
-  public static synchronized GLContext getShareContext(GLContext contextToCreate) {
-    ShareSet share = entryFor(contextToCreate);
-    if (share == null) {
-      return null;
+    final ShareSet share = entryFor(context);
+    if (share != null) {
+        return share.getDestroyedShares();
     }
-    return share.getCreatedShare(contextToCreate);
+    return null;
+  }
+
+  /** Returns true if the given GLContext has shared and created GLContext left including itself, otherwise false. */
+  public static synchronized boolean hasCreatedSharedLeft(GLContext context) {
+      final Set<GLContext> s = getCreatedSharesImpl(context);
+      return null != s && s.size() > 0;
+  }
+
+  /** Returns a new array-list of created GLContext shared with the given GLContext. */
+  public static synchronized ArrayList<GLContext> getCreatedShares(final GLContext context) {
+      final ArrayList<GLContext> otherShares = new ArrayList<GLContext>();
+      final Set<GLContext> createdShares = getCreatedSharesImpl(context);
+      if( null != createdShares ) {
+          for (final Iterator<GLContext> iter = createdShares.iterator(); iter.hasNext(); ) {
+            final GLContext ctx = iter.next();
+            if (ctx != context) {
+                otherShares.add(ctx);
+            }
+          }
+      }
+      return otherShares;
   }
 
-  public static synchronized boolean contextCreated(GLContext context) {
-    ShareSet share = entryFor(context);
+  /** Returns a new array-list of destroyed GLContext shared with the given GLContext. */
+  public static synchronized ArrayList<GLContext> getDestroyedShares(final GLContext context) {
+      final ArrayList<GLContext> otherShares = new ArrayList<GLContext>();
+      final Set<GLContext> destroyedShares = getDestroyedSharesImpl(context);
+      if( null != destroyedShares ) {
+          for (final Iterator<GLContext> iter = destroyedShares.iterator(); iter.hasNext(); ) {
+            final GLContext ctx = iter.next();
+            if (ctx != context) {
+                otherShares.add(ctx);
+            }
+          }
+      }
+      return otherShares;
+  }
+
+  /** Mark the given GLContext as being created. */
+  public static synchronized boolean contextCreated(final GLContext context) {
+    final ShareSet share = entryFor(context);
     if (share != null) {
       share.contextCreated(context);
       return true;
@@ -227,8 +252,9 @@ public class GLContextShareSet {
     return false;
   }
 
-  public static synchronized boolean contextDestroyed(GLContext context) {
-    ShareSet share = entryFor(context);
+  /** Mark the given GLContext as being destroyed. */
+  public static synchronized boolean contextDestroyed(final GLContext context) {
+    final ShareSet share = entryFor(context);
     if (share != null) {
       share.contextDestroyed(context);
       return true;
@@ -236,48 +262,24 @@ public class GLContextShareSet {
     return false;
   }
 
-  /** In order to avoid glGet calls for buffer object checks related
-      to glVertexPointer, etc. calls as well as glMapBuffer calls, we
-      need to share the same GLBufferSizeTracker object between
-      contexts sharing textures and display lists. For now we keep
-      this mechanism orthogonal to the GLObjectTracker to hopefully
-      keep things easier to understand. (The GLObjectTracker is
-      currently only needed in a fairly esoteric case, when the
-      Java2D/JOGL bridge is active, but the GLBufferSizeTracker
-      mechanism is now always required.) */
-  public static void synchronizeBufferObjectSharing(GLContext olderContextOrNull, GLContext newContext) {
-    GLContextImpl older = (GLContextImpl) olderContextOrNull;
-    GLContextImpl newer = (GLContextImpl) newContext;
-    GLBufferSizeTracker tracker = null;
-    if (older != null) {
-      tracker = older.getBufferSizeTracker();
-      assert (tracker != null)
-        : "registerForBufferObjectSharing was not called properly for the older context, or has a bug in it";
-    }
-    if (tracker == null) {
-      tracker = new GLBufferSizeTracker();
-    }
-    newer.setBufferSizeTracker(tracker);
-  }
-
   //----------------------------------------------------------------------
   // Internals only below this point
-  
 
-  private static ShareSet entryFor(GLContext context) {
-    return (ShareSet) shareMap.get(context);
+
+  private static ShareSet entryFor(final GLContext context) {
+    return shareMap.get(context);
   }
 
-  private static void addEntry(GLContext context, ShareSet share) {
+  private static void addEntry(final GLContext context, final ShareSet share) {
     if (shareMap.get(context) == null) {
       shareMap.put(context, share);
     }
   }
-  private static ShareSet removeEntry(GLContext context) {
-    return (ShareSet) shareMap.remove(context);
+  private static ShareSet removeEntry(final GLContext context) {
+    return shareMap.remove(context);
   }
-  
-  protected static String toHexString(long hex) {
+
+  private static String toHexString(long hex) {
     return "0x" + Long.toHexString(hex);
-  }  
+  }
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java b/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
index b950c2fdf..2c947693c 100644
--- a/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
+++ b/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
@@ -27,6 +27,8 @@
  */
 package jogamp.opengl;
 
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.ArrayList;
 
 import javax.media.nativewindow.NativeWindowException;
@@ -37,68 +39,62 @@ import javax.media.opengl.GLException;
 
 import com.jogamp.common.os.Platform;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
-import jogamp.opengl.gl4.GL4bcProcAddressTable;
+import com.jogamp.opengl.GLExtensions;
 
 /**
  * The GLDebugMessageHandler, handling <i>GL_ARB_debug_output</i> or <i>GL_AMD_debug_output</i>
  * debug messages.<br>
- * 
+ *
  * <p>An instance must be bound to the current thread's GLContext to achieve thread safety.</p>
- * 
- * <p>A native callback function is registered at {@link #enable(boolean) enable(true)}, 
- * which forwards received messages to the added {@link GLDebugListener} directly. 
+ *
+ * <p>A native callback function is registered at {@link #enable(boolean) enable(true)},
+ * which forwards received messages to the added {@link GLDebugListener} directly.
  * Hence the {@link GLDebugListener#messageSent(GLDebugMessage)} implementation shall
  * return as fast as possible.</p>
- * 
+ *
  * <p>In case no <i>GL_ARB_debug_output</i> is available, but <i>GL_AMD_debug_output</i>,
  * the messages are translated to <i>ARB</i> {@link GLDebugMessage}, using {@link GLDebugMessage#translateAMDEvent(javax.media.opengl.GLContext, long, int, int, int, String)}.</p>
  */
 public class GLDebugMessageHandler {
-    /** Extension <i>GL_ARB_debug_output</i> implementing GLDebugMessage */
-    public static final String GL_ARB_debug_output = "GL_ARB_debug_output".intern();
-    
-    /** Extension <i>GL_AMD_debug_output</i> implementing GLDebugMessage */
-    public static final String GL_AMD_debug_output = "GL_AMD_debug_output".intern();
-    
     private static final boolean DEBUG = Debug.debug("GLDebugMessageHandler");
-    
+
     private static final int EXT_ARB = 1;
-    private static final int EXT_AMD = 2;    
-    
+    private static final int EXT_AMD = 2;
+
     static {
         if ( !initIDs0() ) {
             throw new NativeWindowException("Failed to initialize GLDebugMessageHandler jmethodIDs");
-        }        
+        }
     }
-            
-    private final GLContextImpl ctx;    
+
+    private final GLContextImpl ctx;
     private final ListenerSyncedImplStub<GLDebugListener> listenerImpl;
-    
+
     // licefycle: init - EOL
     private String extName;
     private int extType;
     private long glDebugMessageCallbackProcAddress;
-    private boolean extAvailable; 
+    private boolean extAvailable;
     private boolean synchronous;
-    
+
     // licefycle: enable - disable/EOL
     private long handle;
-    
+
     /**
      * @param ctx the associated GLContext
      * @param glDebugExtension chosen extension to use
      */
-    public GLDebugMessageHandler(GLContextImpl ctx) {        
+    public GLDebugMessageHandler(GLContextImpl ctx) {
         this.ctx = ctx;
-        this.listenerImpl = new ListenerSyncedImplStub<GLDebugListener>();        
+        this.listenerImpl = new ListenerSyncedImplStub<GLDebugListener>();
         this.glDebugMessageCallbackProcAddress = 0;
         this.extName = null;
         this.extType = 0;
-        this.extAvailable = false; 
+        this.extAvailable = false;
         this.handle = 0;
         this.synchronous = true;
     }
-    
+
     public void init(boolean enable) {
         if(DEBUG) {
             System.err.println("GLDebugMessageHandler.init("+enable+")");
@@ -110,18 +106,31 @@ public class GLDebugMessageHandler {
             System.err.println("GLDebugMessageHandler.init("+enable+") .. n/a");
         }
     }
-    
+
+    private final long getAddressFor(final ProcAddressTable table, final String functionName) {
+        return AccessController.doPrivileged(new PrivilegedAction<Long>() {
+            @Override
+            public Long run() {
+                try {
+                    return Long.valueOf( table.getAddressFor(functionName) );
+                } catch (IllegalArgumentException iae) {
+                    return Long.valueOf(0);
+                }
+            }
+        } ).longValue();
+    }
+
     public void init() {
         ctx.validateCurrent();
         if( isAvailable()) {
             return;
         }
-        
+
         if( !ctx.isGLDebugEnabled() ) {
             if(DEBUG) {
                 System.err.println("GLDebugMessageHandler: GL DEBUG not set in ARB ctx options: "+ctx.getGLVersion());
             }
-            return;            
+            return;
         }
         if(Platform.OS_TYPE == Platform.OSType.WINDOWS && Platform.is32Bit()) {
             // Currently buggy, ie. throws an exception after leaving the native callback.
@@ -131,101 +140,103 @@ public class GLDebugMessageHandler {
             }
             return;
         }
-        if( ctx.isExtensionAvailable(GL_ARB_debug_output) ) {
-            extName = GL_ARB_debug_output;
+        if( ctx.isExtensionAvailable(GLExtensions.ARB_debug_output) ) {
+            extName = GLExtensions.ARB_debug_output;
             extType = EXT_ARB;
-        } else if( ctx.isExtensionAvailable(GL_AMD_debug_output) ) {
-            extName = GL_AMD_debug_output;
+        } else if( ctx.isExtensionAvailable(GLExtensions.AMD_debug_output) ) {
+            extName = GLExtensions.AMD_debug_output;
             extType = EXT_AMD;
         }
         if(DEBUG) {
             System.err.println("GLDebugMessageHandler: Using extension: <"+extName+">");
         }
-        
+
         if(0 == extType) {
             if(DEBUG) {
                 System.err.println("GLDebugMessageHandler: No extension available! "+ctx.getGLVersion());
+                System.err.println("GL_EXTENSIONS  "+ctx.getGLExtensionCount());
+                System.err.println(ctx.getGLExtensionsString());
             }
             return;
         }
-                
+
         final ProcAddressTable procAddressTable = ctx.getGLProcAddressTable();
-        if( procAddressTable instanceof GL4bcProcAddressTable) {
-            final GL4bcProcAddressTable desktopProcAddressTable = (GL4bcProcAddressTable)procAddressTable;
+        if( !ctx.isGLES1() && !ctx.isGLES2() ) {
             switch(extType) {
-                case EXT_ARB: 
-                    glDebugMessageCallbackProcAddress = desktopProcAddressTable._addressof_glDebugMessageCallbackARB;
+                case EXT_ARB:
+                    glDebugMessageCallbackProcAddress = getAddressFor(procAddressTable, "glDebugMessageCallbackARB");
                     break;
-                case EXT_AMD: 
-                    glDebugMessageCallbackProcAddress = desktopProcAddressTable._addressof_glDebugMessageCallbackAMD;
+                case EXT_AMD:
+                    glDebugMessageCallbackProcAddress = getAddressFor(procAddressTable, "glDebugMessageCallbackAMD");
                     break;
             }
         } else {
+            glDebugMessageCallbackProcAddress = 0;
             if(DEBUG) {
-                System.err.println("Non desktop context not supported");    
-            }            
+                System.err.println("Non desktop context not supported");
+            }
         }
         extAvailable = 0 < extType && null != extName && 0 != glDebugMessageCallbackProcAddress;
-        
+
         if(DEBUG) {
             System.err.println("GLDebugMessageHandler: extAvailable: "+extAvailable+", glDebugMessageCallback* : 0x"+Long.toHexString(glDebugMessageCallbackProcAddress));
         }
-        
+
         if(!extAvailable) {
             glDebugMessageCallbackProcAddress = 0;
         }
-        
+
         handle = 0;
     }
 
     public final boolean isAvailable() { return extAvailable; }
-    
+
     /**
-     * @return The extension implementing the GLDebugMessage feature, 
-     *         either {@link #GL_ARB_debug_output} or {@link #GL_AMD_debug_output}. 
-     *         If unavailable <i>null</i> is returned. 
+     * @return The extension implementing the GLDebugMessage feature,
+     *         either {@link #GL_ARB_debug_output} or {@link #GL_AMD_debug_output}.
+     *         If unavailable <i>null</i> is returned.
      */
     public final String getExtension() {
         return extName;
     }
-    
+
     public final boolean isExtensionARB() {
-        return extName == GL_ARB_debug_output;
+        return extName == GLExtensions.ARB_debug_output;
     }
-    
+
     public final boolean isExtensionAMD() {
-        return extName == GL_AMD_debug_output;
+        return extName == GLExtensions.AMD_debug_output;
     }
-    
+
     /**
-     * @see javax.media.opengl.GLContext#isGLDebugSynchronous() 
+     * @see javax.media.opengl.GLContext#isGLDebugSynchronous()
      */
     public final boolean isSynchronous() { return synchronous; }
-    
+
     /**
-     * @see javax.media.opengl.GLContext#setGLDebugSynchronous(boolean) 
+     * @see javax.media.opengl.GLContext#setGLDebugSynchronous(boolean)
      */
     public final void setSynchronous(boolean synchronous) {
         this.synchronous = synchronous;
         if( isEnabled() ) {
             setSynchronousImpl();
         }
-    }    
+    }
     private final void setSynchronousImpl() {
         if(isExtensionARB()) {
             if(synchronous) {
-                ctx.getGL().glEnable(GL2GL3.GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
+                ctx.getGL().glEnable(GL2GL3.GL_DEBUG_OUTPUT_SYNCHRONOUS);
             } else {
-                ctx.getGL().glDisable(GL2GL3.GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
-            }        
+                ctx.getGL().glDisable(GL2GL3.GL_DEBUG_OUTPUT_SYNCHRONOUS);
+            }
             if(DEBUG) {
                 System.err.println("GLDebugMessageHandler: synchronous "+synchronous);
             }
         }
     }
-    
+
     /**
-     * @see javax.media.opengl.GLContext#enableGLDebugMessage(boolean) 
+     * @see javax.media.opengl.GLContext#enableGLDebugMessage(boolean)
      */
     public final void enable(boolean enable) throws GLException {
         ctx.validateCurrent();
@@ -233,7 +244,7 @@ public class GLDebugMessageHandler {
             return;
         }
         enableImpl(enable);
-    }        
+    }
     final void enableImpl(boolean enable) throws GLException {
         if(enable) {
             if(0 == handle) {
@@ -247,19 +258,19 @@ public class GLDebugMessageHandler {
             if(0 != handle) {
                 unregister0(glDebugMessageCallbackProcAddress, handle);
                 handle = 0;
-            }                    
+            }
         }
         if(DEBUG) {
             System.err.println("GLDebugMessageHandler: enable("+enable+") -> 0x" + Long.toHexString(handle));
         }
     }
-    
+
     public final boolean isEnabled() { return 0 != handle; }
 
-    public final int listenerSize() { 
-        return listenerImpl.size(); 
+    public final int listenerSize() {
+        return listenerImpl.size();
     }
-    
+
     public final void addListener(GLDebugListener listener) {
         listenerImpl.addListener(-1, listener);
     }
@@ -267,11 +278,11 @@ public class GLDebugMessageHandler {
     public final void addListener(int index, GLDebugListener listener) {
         listenerImpl.addListener(index, listener);
     }
-  
+
     public final void removeListener(GLDebugListener listener) {
         listenerImpl.removeListener(listener);
     }
-    
+
     private final void sendMessage(GLDebugMessage msg) {
         synchronized(listenerImpl) {
             if(DEBUG) {
@@ -283,25 +294,26 @@ public class GLDebugMessageHandler {
             }
         }
     }
-    
+
     public static class StdErrGLDebugListener implements GLDebugListener {
         boolean threadDump;
-        
+
         public StdErrGLDebugListener(boolean threadDump) {
             this.threadDump = threadDump;
         }
+        @Override
         public void messageSent(GLDebugMessage event) {
             System.err.println(event);
             if(threadDump) {
                 Thread.dumpStack();
             }
-        }        
+        }
     }
-    
+
     //
     // native -> java
     //
-    
+
     protected final void glDebugMessageARB(int source, int type, int id, int severity, String msg) {
         final GLDebugMessage event = new GLDebugMessage(ctx, System.currentTimeMillis(), source, type, id, severity, msg);
         sendMessage(event);
@@ -311,11 +323,11 @@ public class GLDebugMessageHandler {
         final GLDebugMessage event = GLDebugMessage.translateAMDEvent(ctx, System.currentTimeMillis(), id, category, severity, msg);
         sendMessage(event);
     }
-        
+
     //
     // java -> native
-    // 
-    
+    //
+
     private static native boolean initIDs0();
     private native long register0(long glDebugMessageCallbackProcAddress, int extType);
     private native void unregister0(long glDebugMessageCallbackProcAddress, long handle);
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
index 3c60eb699..c914b5e10 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -47,7 +47,9 @@ import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.OffscreenLayerSurface;
 import javax.media.nativewindow.ProxySurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.opengl.GLAutoDrawable;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
@@ -55,10 +57,16 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
+import javax.media.opengl.GLFBODrawable;
+import javax.media.opengl.GLOffscreenAutoDrawable;
 import javax.media.opengl.GLPbuffer;
 import javax.media.opengl.GLProfile;
 
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
+import com.jogamp.nativewindow.DelegatedUpstreamSurfaceHookWithSurfaceSize;
+import com.jogamp.nativewindow.UpstreamSurfaceHookMutableSize;
+import com.jogamp.opengl.GLAutoDrawableDelegate;
+import com.jogamp.opengl.GLRendererQuirks;
 
 
 /** Extends GLDrawableFactory with a few methods for handling
@@ -66,29 +74,70 @@ import com.jogamp.nativewindow.MutableGraphicsConfiguration;
     Independent Bitmaps on Windows, pixmaps on X11). Direct access to
     these GLDrawables is not supplied directly to end users, though
     they may be instantiated by the GLJPanel implementation. */
+@SuppressWarnings("deprecation")
 public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
-  protected static final boolean DEBUG = GLDrawableImpl.DEBUG;
+  protected static final boolean DEBUG = GLDrawableFactory.DEBUG; // allow package access
 
   protected GLDrawableFactoryImpl() {
     super();
   }
 
   /**
-   * Returns the shared context mapped to the <code>device</code> {@link AbstractGraphicsDevice#getConnection()},
+   * Returns the shared resource mapped to the <code>device</code> {@link AbstractGraphicsDevice#getConnection()},
    * either a pre-existing or newly created, or <code>null</code> if creation failed or not supported.<br>
+   * Creation of the shared resource is tried only once.
+   *
+   * @param device which {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection() connection} denotes the shared the target device, may be <code>null</code> for the platform's default device.
+   */
+  protected final SharedResourceRunner.Resource getOrCreateSharedResource(AbstractGraphicsDevice device) {
+      try {
+          device = validateDevice(device);
+          if( null != device) {
+              return getOrCreateSharedResourceImpl( device );
+          }
+      } catch (GLException gle) {
+          if(DEBUG) {
+              System.err.println("Catched Exception on thread "+getThreadName());
+              gle.printStackTrace();
+          }
+      }
+      return null;
+  }
+  protected abstract SharedResourceRunner.Resource getOrCreateSharedResourceImpl(AbstractGraphicsDevice device);
+
+  /**
+   * Returns the shared context mapped to the <code>device</code> {@link AbstractGraphicsDevice#getConnection()},
+   * either a pre-existing or newly created, or <code>null</code> if creation failed or <b>not supported</b>.<br>
    * Creation of the shared context is tried only once.
    *
    * @param device which {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection() connection} denotes the shared the target device, may be <code>null</code> for the platform's default device.
    */
   public final GLContext getOrCreateSharedContext(AbstractGraphicsDevice device) {
-      device = validateDevice(device);
-      if(null!=device) {
-        return getOrCreateSharedContextImpl(device);
+      final SharedResourceRunner.Resource sr = getOrCreateSharedResource( device );
+      if(null!=sr) {
+        return sr.getContext();
       }
       return null;
   }
-  protected abstract GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device);
-  
+
+  @Override
+  protected final boolean createSharedResourceImpl(AbstractGraphicsDevice device) {
+      final SharedResourceRunner.Resource sr = getOrCreateSharedResource( device );
+      if(null!=sr) {
+          return sr.isValid();
+      }
+      return false;
+  }
+
+  @Override
+  public final GLRendererQuirks getRendererQuirks(AbstractGraphicsDevice device) {
+      final SharedResourceRunner.Resource sr = getOrCreateSharedResource( device );
+      if(null!=sr) {
+          return sr.getRendererQuirks();
+      }
+      return null;
+  }
+
   /**
    * Returns the shared device mapped to the <code>device</code> {@link AbstractGraphicsDevice#getConnection()},
    * either a preexisting or newly created, or <code>null</code> if creation failed or not supported.<br>
@@ -97,25 +146,14 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
    * @param device which {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection() connection} denotes the shared device to be used, may be <code>null</code> for the platform's default device.
    */
   protected final AbstractGraphicsDevice getOrCreateSharedDevice(AbstractGraphicsDevice device) {
-      if(null==device) {
-          device = getDefaultDevice();
-          if(null==device) {
-              throw new InternalError("no default device");
-          }
-          if (GLProfile.DEBUG) {
-              System.err.println("Info: GLDrawableFactoryImpl.getOrCreateSharedContext: using default device : "+device);
-          }
-      } else if( !getIsDeviceCompatible(device) ) {
-          if (GLProfile.DEBUG) {
-              System.err.println("Info: GLDrawableFactoryImpl.getOrCreateSharedContext: device not compatible : "+device);
-          }
-          return null;
+      final SharedResourceRunner.Resource sr = getOrCreateSharedResource( device );
+      if(null!=sr) {
+        return sr.getDevice();
       }
-      return getOrCreateSharedDeviceImpl(device);
+      return null;
   }
-  protected abstract AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device);
 
-  /** 
+  /**
    * Returns the GLDynamicLookupHelper
    * @param profile if EGL/ES, profile <code>1</code> refers to ES1 and <code>2</code> to ES2,
    *        otherwise the profile is ignored.
@@ -125,32 +163,48 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   //---------------------------------------------------------------------------
   // Dispatching GLDrawable construction in respect to the NativeSurface Capabilities
   //
-  public GLDrawable createGLDrawable(NativeSurface target) {
+  @Override
+  public final GLDrawable createGLDrawable(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
     }
     final MutableGraphicsConfiguration config = (MutableGraphicsConfiguration) target.getGraphicsConfiguration();
-    GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    AbstractGraphicsDevice adevice = config.getScreen().getDevice();
+    final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final AbstractGraphicsDevice adevice = config.getScreen().getDevice();
+    final boolean isFBOAvailable = GLContext.isFBOAvailable(adevice, chosenCaps.getGLProfile());
     GLDrawable result = null;
     adevice.lock();
     try {
         final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(target, true);
         if(null != ols) {
-            // layered surface -> Offscreen/PBuffer
-            final GLCapabilities chosenCapsMod = (GLCapabilities) chosenCaps.cloneMutable();
-            chosenCapsMod.setOnscreen(false);
-            chosenCapsMod.setPBuffer(canCreateGLPbuffer(adevice));
+            final GLCapabilitiesImmutable chosenCapsMod = GLGraphicsConfigurationUtil.fixOffscreenGLCapabilities(chosenCaps, this, adevice);
+
+            // layered surface -> Offscreen/[FBO|PBuffer]
+            if( !chosenCapsMod.isFBO() && !chosenCapsMod.isPBuffer() ) {
+                throw new GLException("Neither FBO nor Pbuffer is available for "+chosenCapsMod+", "+target);
+            }
             config.setChosenCapabilities(chosenCapsMod);
+            ols.setChosenCapabilities(chosenCapsMod);
             if(DEBUG) {
-                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable -> Offscreen-Layer: "+target);
+                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable -> Offscreen-Layer");
+                System.err.println("chosenCaps:    "+chosenCaps);
+                System.err.println("chosenCapsMod: "+chosenCapsMod);
+                System.err.println("OffscreenLayerSurface: **** "+ols);
+                System.err.println("Target: **** "+target);
+                Thread.dumpStack();
             }
-            if( ! ( target instanceof SurfaceChangeable ) ) {
+            if( ! ( target instanceof MutableSurface ) ) {
                 throw new IllegalArgumentException("Passed NativeSurface must implement SurfaceChangeable for offscreen layered surface: "+target);
             }
-            result = createOffscreenDrawableImpl(target);            
+            if( chosenCapsMod.isFBO() ) {
+                result = createFBODrawableImpl(target, chosenCapsMod, 0);
+            } else {
+                result = createOffscreenDrawableImpl(target);
+            }
         } else if(chosenCaps.isOnscreen()) {
             // onscreen
+            final GLCapabilitiesImmutable chosenCapsMod = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(chosenCaps);
+            config.setChosenCapabilities(chosenCapsMod);
             if(DEBUG) {
                 System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable: "+target);
             }
@@ -158,12 +212,20 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
         } else {
             // offscreen
             if(DEBUG) {
-                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OffScreenDrawable (PBuffer: "+chosenCaps.isPBuffer()+"): "+target);
+                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OffScreenDrawable, FBO chosen / avail, PBuffer: "+
+                                   chosenCaps.isFBO()+" / "+isFBOAvailable+", "+chosenCaps.isPBuffer()+": "+target);
+            }
+            if( ! ( target instanceof MutableSurface ) ) {
+                throw new IllegalArgumentException("Passed NativeSurface must implement MutableSurface for offscreen: "+target);
             }
-            if( ! ( target instanceof SurfaceChangeable ) ) {
-                throw new IllegalArgumentException("Passed NativeSurface must implement SurfaceChangeable for offscreen: "+target);
+            if( chosenCaps.isFBO() && isFBOAvailable ) {
+                // need to hook-up a native dummy surface since source may not have & use minimum GLCapabilities for it w/ same profile
+                final ProxySurface dummySurface = createDummySurfaceImpl(adevice, false, new GLCapabilities(chosenCaps.getGLProfile()), (GLCapabilitiesImmutable)config.getRequestedCapabilities(), null, 64, 64);
+                dummySurface.setUpstreamSurfaceHook(new DelegatedUpstreamSurfaceHookWithSurfaceSize(dummySurface.getUpstreamSurfaceHook(), target));
+                result = createFBODrawableImpl(dummySurface, chosenCaps, 0);
+            } else {
+                result = createOffscreenDrawableImpl(target);
             }
-            result = createOffscreenDrawableImpl(target);
         }
     } finally {
         adevice.unlock();
@@ -176,128 +238,256 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
 
   //---------------------------------------------------------------------------
   //
-  // Onscreen GLDrawable construction 
+  // Onscreen GLDrawable construction
   //
 
   protected abstract GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target);
 
   //---------------------------------------------------------------------------
   //
-  // PBuffer GLDrawable construction 
+  // PBuffer Offscreen GLAutoDrawable construction
   //
 
-  public abstract boolean canCreateGLPbuffer(AbstractGraphicsDevice device);
+  @Override
+  public abstract boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp);
 
-  public GLPbuffer createGLPbuffer(AbstractGraphicsDevice deviceReq,
+  @Override
+  public final GLPbuffer createGLPbuffer(AbstractGraphicsDevice deviceReq,
                                    GLCapabilitiesImmutable capsRequested,
                                    GLCapabilitiesChooser chooser,
                                    int width,
                                    int height,
                                    GLContext shareWith) {
-    if(height<=0 || height<=0) {
-        throw new GLException("Width and height of pbuffer must be positive (were (" +
-                        width + ", " + height + "))");
+    if(width<=0 || height<=0) {
+        throw new GLException("initial size must be positive (were (" + width + " x " + height + "))");
     }
-
     AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
         throw new GLException("No shared device for requested: "+deviceReq);
     }
-
-    if (!canCreateGLPbuffer(device)) {
-        throw new GLException("Pbuffer support not available with device: "+device);
-    }
-    
-    GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixGLPBufferGLCapabilities(capsRequested);
-    GLDrawableImpl drawable = null;
-    device.lock();
-    try {
-        drawable = (GLDrawableImpl) createGLDrawable( createOffscreenSurfaceImpl(device, capsChosen, capsRequested, chooser, width, height) );
-        if(null != drawable) {
-            drawable.setRealized(true);
-        }
-    } finally {
-        device.unlock();
+    if ( !canCreateGLPbuffer(device, capsRequested.getGLProfile()) ) {
+        throw new GLException("Pbuffer not available with device: "+device);
     }
 
-    if(null==drawable) {
-        throw new GLException("Could not create Pbuffer drawable for: "+device+", "+capsChosen+", "+width+"x"+height);
+    final GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixGLPBufferGLCapabilities(capsRequested);
+    final GLDrawableImpl drawable = createOffscreenDrawableImpl( createMutableSurfaceImpl(device, true, capsChosen, capsRequested, chooser,
+                                                                 new UpstreamSurfaceHookMutableSize(width, height) ) );
+    if(null != drawable) {
+        drawable.setRealized(true);
     }
-    return new GLPbufferImpl( drawable, shareWith);
-  }
 
+    return new GLPbufferImpl( drawable, (GLContextImpl) drawable.createContext(shareWith) );
+  }
 
   //---------------------------------------------------------------------------
   //
-  // Offscreen GLDrawable construction 
+  // Offscreen GLDrawable construction
   //
 
-  protected abstract GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) ;
+  @Override
+  public final boolean canCreateFBO(AbstractGraphicsDevice deviceReq, GLProfile glp) {
+    AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
+    if(null == device) {
+        throw new GLException("No shared device for requested: "+deviceReq);
+    }
+    return GLContext.isFBOAvailable(device, glp);
+  }
+
+  @Override
+  public final GLOffscreenAutoDrawable createOffscreenAutoDrawable(AbstractGraphicsDevice deviceReq,
+                                                             GLCapabilitiesImmutable capsRequested,
+                                                             GLCapabilitiesChooser chooser,
+                                                             int width, int height,
+                                                             GLContext shareWith) {
+    final GLDrawable drawable = createOffscreenDrawable( deviceReq, capsRequested, chooser, width, height );
+    drawable.setRealized(true);
+    final GLContext context = drawable.createContext(shareWith);
+    if(drawable instanceof GLFBODrawableImpl) {
+        return new GLOffscreenAutoDrawableImpl.FBOImpl( (GLFBODrawableImpl)drawable, context, null, null );
+    }
+    return new GLOffscreenAutoDrawableImpl( drawable, context, null, null);
+  }
+
+  @Override
+  public final GLOffscreenAutoDrawable createOffscreenAutoDrawable(AbstractGraphicsDevice deviceReq,
+                                                             GLCapabilitiesImmutable capsRequested,
+                                                             GLCapabilitiesChooser chooser,
+                                                             int width, int height) {
+    final GLDrawable drawable = createOffscreenDrawable( deviceReq, capsRequested, chooser, width, height );
+    drawable.setRealized(true);
+    if(drawable instanceof GLFBODrawableImpl) {
+        return new GLOffscreenAutoDrawableImpl.FBOImpl( (GLFBODrawableImpl)drawable, null, null, null );
+    }
+    return new GLOffscreenAutoDrawableImpl( drawable, null, null, null);
+  }
 
-  public GLDrawable createOffscreenDrawable(AbstractGraphicsDevice deviceReq,
+  @Override
+  public final GLAutoDrawable createDummyAutoDrawable(AbstractGraphicsDevice deviceReq, boolean createNewDevice, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
+      final GLDrawable drawable = createDummyDrawable(deviceReq, createNewDevice, capsRequested, chooser);
+      drawable.setRealized(true);
+      final GLAutoDrawable sharedDrawable = new GLAutoDrawableDelegate(drawable, null, null, true /*ownDevice*/, null) { };
+      return sharedDrawable;
+  }
+
+  @Override
+  public final GLDrawable createOffscreenDrawable(AbstractGraphicsDevice deviceReq,
                                             GLCapabilitiesImmutable capsRequested,
                                             GLCapabilitiesChooser chooser,
-                                            int width,
-                                            int height) {
+                                            int width, int height) {
     if(width<=0 || height<=0) {
-        throw new GLException("Width and height of pbuffer must be positive (were (" +
-                        width + ", " + height + "))");
+        throw new GLException("initial size must be positive (were (" + width + " x " + height + "))");
     }
-    AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
+    final AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
         throw new GLException("No shared device for requested: "+deviceReq);
     }
-    GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixOffScreenGLCapabilities(capsRequested, canCreateGLPbuffer(deviceReq));
 
-    device.lock();
-    try {
-        return createGLDrawable( createOffscreenSurfaceImpl(device, capsChosen, capsRequested, chooser, width, height) );
-    } finally {
-        device.unlock();
+    final GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixOffscreenGLCapabilities(capsRequested, this, device);
+
+    if( capsChosen.isFBO() ) {
+        // Use minimum GLCapabilities for the dummy surface w/ same profile
+        final ProxySurface dummySurface = createDummySurfaceImpl(device, true, new GLCapabilities(capsChosen.getGLProfile()), capsRequested, null, width, height);
+        final GLDrawableImpl dummyDrawable = createOnscreenDrawableImpl(dummySurface);
+        return new GLFBODrawableImpl.ResizeableImpl(this, dummyDrawable, dummySurface, capsChosen, 0);
     }
+    return createOffscreenDrawableImpl( createMutableSurfaceImpl(device, true, capsChosen, capsRequested, chooser,
+                                                                 new UpstreamSurfaceHookMutableSize(width, height) ) );
   }
 
-  public NativeSurface createOffscreenSurface(AbstractGraphicsDevice deviceReq,
-                                              GLCapabilitiesImmutable capsRequested,
-                                              GLCapabilitiesChooser chooser,
-                                              int width, int height) {
-    AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
+  @Override
+  public final GLDrawable createDummyDrawable(AbstractGraphicsDevice deviceReq, boolean createNewDevice, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
+    final AbstractGraphicsDevice device = createNewDevice ? getOrCreateSharedDevice(deviceReq) : deviceReq;
     if(null == device) {
-        throw new GLException("No shared device for requested: "+deviceReq);
+        throw new GLException("No shared device for requested: "+deviceReq+", createNewDevice "+createNewDevice);
+    }
+    if( !createNewDevice ) {
+        device.lock();
     }
-    GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixOffScreenGLCapabilities(capsRequested, canCreateGLPbuffer(deviceReq));
-
-    device.lock();
     try {
-        return createOffscreenSurfaceImpl(device, capsChosen, capsRequested, chooser, width, height);
+        final ProxySurface dummySurface = createDummySurfaceImpl(device, createNewDevice, capsRequested, capsRequested, chooser, 64, 64);
+        return createOnscreenDrawableImpl(dummySurface);
     } finally {
-        device.unlock();
+        if( !createNewDevice ) {
+            device.unlock();
+        }
     }
   }
 
+  /** Creates a platform independent unrealized FBO offscreen GLDrawable */
+  protected final GLFBODrawable createFBODrawableImpl(NativeSurface dummySurface, GLCapabilitiesImmutable fboCaps, int textureUnit) {
+    final GLDrawableImpl dummyDrawable = createOnscreenDrawableImpl(dummySurface);
+    return new GLFBODrawableImpl(this, dummyDrawable, dummySurface, fboCaps, textureUnit);
+  }
+
+  /** Creates a platform dependent unrealized offscreen pbuffer/pixmap GLDrawable instance */
+  protected abstract GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) ;
+
   /**
-   * creates an offscreen NativeSurface, which must implement SurfaceChangeable as well,
-   * so the windowing system related implementation is able to set the surface handle.
+   * Creates a mutable {@link ProxySurface} w/o defined surface handle.
+   * <p>
+   * It's {@link AbstractGraphicsConfiguration} is properly set according to the given {@link GLCapabilitiesImmutable}.
+   * </p>
+   * <p>
+   * Lifecycle (destruction) of the TBD surface handle shall be handled by the caller.
+   * </p>
+   * @param device a valid platform dependent target device.
+   * @param createNewDevice if <code>true</code> a new independent device instance is created using <code>device</code> details,
+   *                        otherwise <code>device</code> instance is used as-is.
+   * @param capsChosen
+   * @param capsRequested
+   * @param chooser the custom chooser, may be null for default
+   * @param upstreamHook surface size information and optional control of the surface's lifecycle
+   * @return the created {@link MutableSurface} instance w/o defined surface handle
    */
-  protected abstract NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device,
-                                                              GLCapabilitiesImmutable capabilities, GLCapabilitiesImmutable capsRequested,
-                                                              GLCapabilitiesChooser chooser,
-                                                              int width, int height);
+  protected abstract ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice device, boolean createNewDevice,
+                                                           GLCapabilitiesImmutable capsChosen,
+                                                           GLCapabilitiesImmutable capsRequested,
+                                                           GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook);
 
-  public ProxySurface createProxySurface(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
+  /**
+   * A dummy surface is not visible on screen and will not be used to render directly to,
+   * it maybe on- or offscreen.
+   * <p>
+   * It is used to allow the creation of a {@link GLDrawable} and {@link GLContext} to query information.
+   * It also allows creation of framebuffer objects which are used for rendering or using a shared GLContext w/o actually rendering to a usable framebuffer.
+   * </p>
+   * <p>
+   * Creates a new independent device instance using <code>deviceReq</code> details.
+   * </p>
+   * @param deviceReq which {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection() connection} denotes the shared device to be used, may be <code>null</code> for the platform's default device.
+   * @param requestedCaps
+   * @param chooser the custom chooser, may be null for default
+   * @param width the initial width as returned by {@link NativeSurface#getWidth()}, not the actual dummy surface width.
+   *        The latter is platform specific and small
+   * @param height the initial height as returned by {@link NativeSurface#getHeight()}, not the actual dummy surface height,
+   *        The latter is platform specific and small
+   *
+   * @return the created {@link ProxySurface} instance w/o defined surface handle but platform specific {@link UpstreamSurfaceHook}.
+   */
+  public final ProxySurface createDummySurface(AbstractGraphicsDevice deviceReq, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser,
+                                          int width, int height) {
+    final AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
-        throw new GLException("No shared device for requested: "+device);
+        throw new GLException("No shared device for requested: "+deviceReq);
+    }
+    return createDummySurfaceImpl(device, true, requestedCaps, requestedCaps, chooser, width, height);
+  }
+
+  /**
+   * A dummy surface is not visible on screen and will not be used to render directly to,
+   * it maybe on- or offscreen.
+   * <p>
+   * It is used to allow the creation of a {@link GLDrawable} and {@link GLContext} to query information.
+   * It also allows creation of framebuffer objects which are used for rendering or using a shared GLContext w/o actually rendering to a usable framebuffer.
+   * </p>
+   * @param device a valid platform dependent target device.
+   * @param createNewDevice if <code>true</code> a new device instance is created using <code>device</code> details,
+   *                        otherwise <code>device</code> instance is used as-is.
+   * @param chosenCaps
+   * @param requestedCaps
+   * @param chooser the custom chooser, may be null for default
+   * @param width the initial width as returned by {@link NativeSurface#getWidth()}, not the actual dummy surface width.
+   *        The latter is platform specific and small
+   * @param height the initial height as returned by {@link NativeSurface#getHeight()}, not the actual dummy surface height,
+   *        The latter is platform specific and small
+   * @return the created {@link ProxySurface} instance w/o defined surface handle but platform specific {@link UpstreamSurfaceHook}.
+   */
+  public abstract ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice device, boolean createNewDevice,
+                                                      GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height);
+
+  //---------------------------------------------------------------------------
+  //
+  // ProxySurface (Wrapped pre-existing native surface) construction
+  //
+
+  @Override
+  public ProxySurface createProxySurface(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle,
+                                         GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
+    if(null == device) {
+        throw new GLException("No shared device for requested: "+deviceReq);
+    }
+    if(0 == windowHandle) {
+        throw new IllegalArgumentException("Null windowHandle");
     }
 
     device.lock();
     try {
-        return createProxySurfaceImpl(device, windowHandle, capsRequested, chooser);
+        return createProxySurfaceImpl(device, screenIdx, windowHandle, capsRequested, chooser, upstream);
     } finally {
         device.unlock();
     }
-  }  
-  
-  protected abstract ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser);
+  }
+
+  /**
+   * Creates a {@link ProxySurface} with a set surface handle.
+   * <p>
+   * Implementation is also required to allocate it's own {@link AbstractGraphicsDevice} instance.
+   * </p>
+ * @param upstream TODO
+   */
+  protected abstract ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle,
+                                                         GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream);
 
   //---------------------------------------------------------------------------
   //
@@ -305,25 +495,17 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   //
 
   protected abstract GLContext createExternalGLContextImpl();
-  
+
+  @Override
   public GLContext createExternalGLContext() {
-    NativeWindowFactory.getDefaultToolkitLock().lock();
-    try {
-        return createExternalGLContextImpl();
-    } finally {
-        NativeWindowFactory.getDefaultToolkitLock().unlock();
-    }
+    return createExternalGLContextImpl();
   }
 
   protected abstract GLDrawable createExternalGLDrawableImpl();
 
+  @Override
   public GLDrawable createExternalGLDrawable() {
-    NativeWindowFactory.getDefaultToolkitLock().lock();
-    try {
-        return createExternalGLDrawableImpl();
-    } finally {
-        NativeWindowFactory.getDefaultToolkitLock().unlock();
-    }
+    return createExternalGLDrawableImpl();
   }
 
 
@@ -342,17 +524,6 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
     return (GLDrawableFactoryImpl) getFactory(glp);
   }
 
-  //---------------------------------------------------------------------------
-  // Support for Java2D/JOGL bridge on Mac OS X; the external
-  // GLDrawable mechanism in the public API is sufficient to
-  // implement this functionality on all other platforms
-  //
-
-  public abstract boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device);
-
-  public abstract GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException;
-
   //----------------------------------------------------------------------
   // Gamma adjustment support
   // Thanks to the LWJGL team for illustrating how to make these
@@ -399,7 +570,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
    * normal ahead of time, use resetDisplayGamma(). Throws
    * IllegalArgumentException if any of the parameters were
    * out-of-bounds.
-   * 
+   *
    * @param gamma The gamma value, typically > 1.0 (default value is
    *   1.0)
    * @param brightness The brightness value between -1.0 and 1.0,
@@ -436,16 +607,16 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
         rampEntry = 0.0f;
       gammaRamp[i] = rampEntry;
     }
-    registerGammaShutdownHook();
+    needsGammaRampReset = true;
     return setGammaRamp(gammaRamp);
   }
 
+  @Override
   public synchronized void resetDisplayGamma() {
-    if (gammaShutdownHook == null) {
-      throw new IllegalArgumentException("Should not call this unless setDisplayGamma called first");
+    if( needsGammaRampReset ) {
+        resetGammaRamp(originalGammaRamp);
+        needsGammaRampReset = false;
     }
-    resetGammaRamp(originalGammaRamp);
-    unregisterGammaShutdownHook();
   }
 
   //------------------------------------------------------
@@ -477,34 +648,6 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   }
 
   // Shutdown hook mechanism for resetting gamma
-  private boolean gammaShutdownHookRegistered;
-  private Thread  gammaShutdownHook;
-  private Buffer  originalGammaRamp;
-  private synchronized void registerGammaShutdownHook() {
-    if (gammaShutdownHookRegistered)
-      return;
-    if (gammaShutdownHook == null) {
-      gammaShutdownHook = new Thread(new Runnable() {
-          public void run() {
-            synchronized (GLDrawableFactoryImpl.this) {
-              resetGammaRamp(originalGammaRamp);
-            }
-          }
-        });
-      originalGammaRamp = getGammaRamp();
-    }
-    Runtime.getRuntime().addShutdownHook(gammaShutdownHook);
-    gammaShutdownHookRegistered = true;
-  }
-
-  private synchronized void unregisterGammaShutdownHook() {
-    if (!gammaShutdownHookRegistered)
-      return;
-    if (gammaShutdownHook == null) {
-      throw new InternalError("Error in gamma shutdown hook logic");
-    }
-    Runtime.getRuntime().removeShutdownHook(gammaShutdownHook);
-    gammaShutdownHookRegistered = false;
-    // Leave the original gamma ramp data alone
-  }
+  private volatile Buffer originalGammaRamp;
+  private volatile boolean needsGammaRampReset = false;
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
index c992b3cb2..0e135d5e0 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,34 +41,52 @@
 package jogamp.opengl;
 
 import java.util.ArrayList;
+import java.util.List;
 import java.util.HashSet;
 
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowException;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.opengl.GL;
 import javax.media.opengl.GLAnimatorControl;
 import javax.media.opengl.GLAutoDrawable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLEventListener;
 import javax.media.opengl.GLException;
+import javax.media.opengl.GLFBODrawable;
 import javax.media.opengl.GLRunnable;
-
-import com.jogamp.opengl.util.Animator;
+import javax.media.opengl.GLSharedContextSetter;
 
 /** Encapsulates the implementation of most of the GLAutoDrawable's
-    methods to be able to share it between GLCanvas and GLJPanel. */
-
+    methods to be able to share it between GLAutoDrawable implementations like GLAutoDrawableBase, GLCanvas and GLJPanel. */
 public class GLDrawableHelper {
   /** true if property <code>jogl.debug.GLDrawable.PerfStats</code> is defined. */
-  private static final boolean PERF_STATS = Debug.isPropertyDefined("jogl.debug.GLDrawable.PerfStats", true);
-    
+  private static final boolean PERF_STATS;
+
+  static {
+      Debug.initSingleton();
+      PERF_STATS = Debug.isPropertyDefined("jogl.debug.GLDrawable.PerfStats", true);
+  }
+
   protected static final boolean DEBUG = GLDrawableImpl.DEBUG;
-  private Object listenersLock = new Object();
-  private ArrayList<GLEventListener> listeners;
-  private HashSet<GLEventListener> listenersToBeInit;
+  private final Object listenersLock = new Object();
+  private final ArrayList<GLEventListener> listeners = new ArrayList<GLEventListener>();
+  private final HashSet<GLEventListener> listenersToBeInit = new HashSet<GLEventListener>();
+  private final Object glRunnablesLock = new Object();
+  private volatile ArrayList<GLRunnableTask> glRunnables = new ArrayList<GLRunnableTask>();
   private boolean autoSwapBufferMode;
-  private Thread skipContextReleaseThread;
-  private Object glRunnablesLock = new Object();
-  private ArrayList<GLRunnable> glRunnables;
+  private volatile Thread exclusiveContextThread;
+  /** -1 release, 0 nop, 1 claim */
+  private volatile int exclusiveContextSwitch;
   private GLAnimatorControl animatorCtrl;
+  private static Runnable nop = new Runnable() { @Override public void run() {} };
+
+  private GLContext sharedContext;
+  private GLAutoDrawable sharedAutoDrawable;
+
 
   public GLDrawableHelper() {
     reset();
@@ -76,15 +94,76 @@ public class GLDrawableHelper {
 
   public final void reset() {
     synchronized(listenersLock) {
-        listeners = new ArrayList<GLEventListener>();
-        listenersToBeInit = new HashSet<GLEventListener>();
+        listeners.clear();
+        listenersToBeInit.clear();
     }
     autoSwapBufferMode = true;
-    skipContextReleaseThread = null;
+    exclusiveContextThread = null;
+    exclusiveContextSwitch = 0;
     synchronized(glRunnablesLock) {
-        glRunnables = new ArrayList<GLRunnable>();
+        glRunnables.clear();
     }
     animatorCtrl = null;
+    sharedContext = null;
+    sharedAutoDrawable = null;
+  }
+
+  public final void setSharedContext(GLContext thisContext, GLContext sharedContext) throws IllegalStateException {
+      if( null == sharedContext ) {
+          throw new IllegalStateException("Null shared GLContext");
+      }
+      if( thisContext == sharedContext ) {
+          throw new IllegalStateException("Shared GLContext same as local");
+      }
+      if( null != this.sharedContext ) {
+          throw new IllegalStateException("Shared GLContext already set");
+      }
+      if( null != this.sharedAutoDrawable ) {
+          throw new IllegalStateException("Shared GLAutoDrawable already set");
+      }
+      this.sharedContext = sharedContext;
+  }
+
+  public final void setSharedAutoDrawable(GLAutoDrawable thisAutoDrawable, GLAutoDrawable sharedAutoDrawable) throws IllegalStateException {
+      if( null == sharedAutoDrawable ) {
+          throw new IllegalStateException("Null shared GLAutoDrawable");
+      }
+      if( thisAutoDrawable == sharedAutoDrawable ) {
+          throw new IllegalStateException("Shared GLAutoDrawable same as this");
+      }
+      if( null != this.sharedContext ) {
+          throw new IllegalStateException("Shared GLContext already set");
+      }
+      if( null != this.sharedAutoDrawable ) {
+          throw new IllegalStateException("Shared GLAutoDrawable already set");
+      }
+      this.sharedAutoDrawable = sharedAutoDrawable;
+  }
+
+  /**
+   * @param shared returns the shared GLContext, based on set shared GLAutoDrawable
+   *               or GLContext. Maybe null if none is set.
+   * @return true if initialization is pending due to a set shared GLAutoDrawable or GLContext
+   *         which is not ready yet. Otherwise false.
+   */
+  public boolean isSharedGLContextPending(GLContext[] shared) {
+      final GLContext shareWith;
+      final boolean pending;
+      if ( null != sharedAutoDrawable ) {
+          final boolean allGLELInitialized;
+          if( sharedAutoDrawable instanceof GLSharedContextSetter ) {
+              allGLELInitialized = ((GLSharedContextSetter)sharedAutoDrawable).areAllGLEventListenerInitialized();
+          } else {
+              allGLELInitialized = true; // we have to assume 'yes'
+          }
+          shareWith = sharedAutoDrawable.getContext();
+          pending = null == shareWith || !shareWith.isCreated() || !allGLELInitialized;
+      } else {
+          shareWith = sharedContext;
+          pending = null != shareWith && !shareWith.isCreated();
+      }
+      shared[0] = shareWith;
+      return pending;
   }
 
   @Override
@@ -105,6 +184,207 @@ public class GLDrawableHelper {
     return sb.toString();
   }
 
+  /** Limit release calls of {@link #forceNativeRelease(GLContext)} to {@value}. */
+  private static final int MAX_RELEASE_ITER = 512;
+
+  /**
+   * Since GLContext's {@link GLContext#makeCurrent()} and {@link GLContext#release()}
+   * is recursive, a call to {@link GLContext#release()} may not natively release the context.
+   * <p>
+   * This methods continues calling {@link GLContext#release()} until the context has been natively released.
+   * </p>
+   * @param ctx
+   */
+  public static final void forceNativeRelease(GLContext ctx) {
+      int releaseCount = 0;
+      do {
+          ctx.release();
+          releaseCount++;
+          if (DEBUG) {
+              System.err.println("GLDrawableHelper.forceNativeRelease() #"+releaseCount+" -- currentThread "+Thread.currentThread()+" -> "+GLContext.getCurrent());
+          }
+      } while( MAX_RELEASE_ITER > releaseCount && ctx.isCurrent() );
+
+      if( ctx.isCurrent() ) {
+          throw new GLException("Context still current after "+MAX_RELEASE_ITER+" releases: "+ctx);
+      }
+  }
+
+  /**
+   * Switch {@link GLContext} / {@link GLDrawable} association.
+   * <p>
+   * The <code>oldCtx</code> will be destroyed if <code>destroyPrevCtx</code> is <code>true</code>,
+   * otherwise dis-associate <code>oldCtx</code> from <code>drawable</code>
+   * via {@link GLContext#setGLDrawable(GLDrawable, boolean) oldCtx.setGLDrawable(null, true);}.
+   * </p>
+   * <p>
+   * Re-associate <code>newCtx</code> with <code>drawable</code>
+   * via {@link GLContext#setGLDrawable(GLDrawable, boolean) newCtx.setGLDrawable(drawable, true);}.
+   * </p>
+   * <p>
+   * If the old or new context was current on this thread, it is being released before switching the drawable.
+   * </p>
+   * <p>
+   * No locking is being performed on the drawable, caller is required to take care of it.
+   * </p>
+   *
+   * @param drawable the drawable which context is changed
+   * @param oldCtx the old context, maybe <code>null</code>.
+   * @param destroyOldCtx if <code>true</code>, destroy the <code>oldCtx</code>
+   * @param newCtx the new context, maybe <code>null</code> for dis-association.
+   * @param newCtxCreationFlags additional creation flags if newCtx is not null and not been created yet, see {@link GLContext#setContextCreationFlags(int)}
+   *
+   * @see GLAutoDrawable#setContext(GLContext, boolean)
+   */
+  public static final void switchContext(GLDrawable drawable, GLContext oldCtx, boolean destroyOldCtx, GLContext newCtx, int newCtxCreationFlags) {
+      if( null != oldCtx ) {
+          if( destroyOldCtx ) {
+              oldCtx.destroy();
+          } else {
+              oldCtx.setGLDrawable(null, true); // dis-associate old pair
+          }
+      }
+
+      if(null!=newCtx) {
+          newCtx.setContextCreationFlags(newCtxCreationFlags);
+          newCtx.setGLDrawable(drawable, true); // re-associate new pair
+      }
+  }
+
+  /**
+   * If the drawable is not realized, OP is a NOP.
+   * <ul>
+   *  <li>release context if current</li>
+   *  <li>destroy old drawable</li>
+   *  <li>create new drawable</li>
+   *  <li>attach new drawable to context</li>
+   *  <li>make context current, if it was current</li>
+   * </ul>
+   * <p>
+   * Locking is performed via {@link GLContext#makeCurrent()} on the passed <code>context</code>.
+   * </p>
+   *
+   * @param drawable
+   * @param context maybe null
+   * @return the new drawable
+   */
+  public static final GLDrawableImpl recreateGLDrawable(GLDrawableImpl drawable, GLContext context) {
+      if( ! drawable.isRealized() ) {
+          return drawable;
+      }
+      final GLContext currentContext = GLContext.getCurrent();
+      final GLDrawableFactory factory = drawable.getFactory();
+      final NativeSurface surface = drawable.getNativeSurface();
+      final ProxySurface proxySurface = (surface instanceof ProxySurface) ? (ProxySurface)surface : null;
+
+      if( null != context ) {
+          // Ensure to sync GL command stream
+          if( currentContext != context ) {
+              context.makeCurrent();
+          }
+          context.getGL().glFinish();
+          context.setGLDrawable(null, true); // dis-associate
+      }
+
+      if(null != proxySurface) {
+          proxySurface.enableUpstreamSurfaceHookLifecycle(false);
+      }
+      try {
+          drawable.setRealized(false);
+          drawable = (GLDrawableImpl) factory.createGLDrawable(surface); // [2]
+          drawable.setRealized(true);
+      } finally {
+          if(null != proxySurface) {
+              proxySurface.enableUpstreamSurfaceHookLifecycle(true);
+          }
+      }
+
+      if(null != context) {
+          context.setGLDrawable(drawable, true); // re-association
+      }
+
+      if( null != currentContext ) {
+          currentContext.makeCurrent();
+      }
+      return drawable;
+  }
+
+  /**
+   * Performs resize operation on the given drawable, assuming it is offscreen.
+   * <p>
+   * The {@link GLDrawableImpl}'s {@link NativeSurface} is being locked during operation.
+   * In case the holder is an auto drawable or similar, it's lock shall be claimed by the caller.
+   * </p>
+   * <p>
+   * May recreate the drawable via {@link #recreateGLDrawable(GLDrawableImpl, GLContext)}
+   * in case of a a pbuffer- or pixmap-drawable.
+   * </p>
+   * <p>
+   * FBO drawables are resized w/o drawable destruction.
+   * </p>
+   * <p>
+   * Offscreen resize operation is validated w/ drawable size in the end.
+   * An exception is thrown if not successful.
+   * </p>
+   *
+   * @param drawable
+   * @param context
+   * @param newWidth the new width, it's minimum is capped to 1
+   * @param newHeight the new height, it's minimum is capped to 1
+   * @return the new drawable in case of an pbuffer/pixmap drawable, otherwise the passed drawable is being returned.
+   * @throws NativeWindowException is drawable is not offscreen or it's surface lock couldn't be claimed
+   * @throws GLException may be thrown a resize operation
+   */
+  public static final GLDrawableImpl resizeOffscreenDrawable(GLDrawableImpl drawable, GLContext context, int newWidth, int newHeight)
+          throws NativeWindowException, GLException
+  {
+      final NativeSurface ns = drawable.getNativeSurface();
+      final int lockRes = ns.lockSurface();
+      if ( NativeSurface.LOCK_SURFACE_NOT_READY >= lockRes ) {
+          throw new NativeWindowException("Could not lock surface of drawable: "+drawable);
+      }
+      boolean validateSize = true;
+      try {
+          if( ! drawable.isRealized() ) {
+              return drawable;
+          }
+          if( drawable.getChosenGLCapabilities().isOnscreen() ) {
+              throw new NativeWindowException("Drawable is not offscreen: "+drawable);
+          }
+          if( DEBUG && ( 0>=newWidth || 0>=newHeight) ) {
+              System.err.println("WARNING: Odd size detected: "+newWidth+"x"+newHeight+", using safe size 1x1. Drawable "+drawable);
+              Thread.dumpStack();
+          }
+          if( 0 >= newWidth )  { newWidth = 1; validateSize=false; }
+          if( 0 >= newHeight ) { newHeight = 1; validateSize=false; }
+          // propagate new size
+          if( ns instanceof ProxySurface ) {
+              final ProxySurface ps = (ProxySurface) ns;
+              final UpstreamSurfaceHook ush = ps.getUpstreamSurfaceHook();
+              if(ush instanceof UpstreamSurfaceHook.MutableSize) {
+                  ((UpstreamSurfaceHook.MutableSize)ush).setSize(newWidth, newHeight);
+              } else if(DEBUG) { // we have to assume UpstreamSurfaceHook contains the new size already, hence size check @ bottom
+                  System.err.println("GLDrawableHelper.resizeOffscreenDrawable: Drawable's offscreen ProxySurface n.a. UpstreamSurfaceHook.MutableSize, but "+ush.getClass().getName()+": "+ush);
+              }
+          } else if(DEBUG) { // we have to assume surface contains the new size already, hence size check @ bottom
+              System.err.println("GLDrawableHelper.resizeOffscreenDrawable: Drawable's offscreen surface n.a. ProxySurface, but "+ns.getClass().getName()+": "+ns);
+          }
+          if( drawable instanceof GLFBODrawable ) {
+              if( null != context && context.isCreated() ) {
+                  ((GLFBODrawable) drawable).resetSize(context.getGL());
+              }
+          } else {
+              drawable = GLDrawableHelper.recreateGLDrawable(drawable, context);
+          }
+      } finally {
+          ns.unlockSurface();
+      }
+      if( validateSize && ( drawable.getWidth() != newWidth || drawable.getHeight() != newHeight ) ) {
+          throw new InternalError("Incomplete resize operation: expected "+newWidth+"x"+newHeight+", has: "+drawable);
+      }
+      return drawable;
+  }
+
   public final void addGLEventListener(GLEventListener listener) {
     addGLEventListener(-1, listener);
   }
@@ -117,88 +397,296 @@ public class GLDrawableHelper {
         // GLEventListener may be added after context is created,
         // hence we earmark initialization for the next display call.
         listenersToBeInit.add(listener);
+
         listeners.add(index, listener);
     }
   }
-  
-  public final void removeGLEventListener(GLEventListener listener) {
+
+  /**
+   * Note that no {@link GLEventListener#dispose(GLAutoDrawable)} call is being issued
+   * due to the lack of a current context.
+   * Consider calling {@link #disposeGLEventListener(GLAutoDrawable, GLDrawable, GLContext, GLEventListener)}.
+   * @return the removed listener, or null if listener was not added
+   */
+  public final GLEventListener removeGLEventListener(GLEventListener listener) {
     synchronized(listenersLock) {
-        listeners.remove(listener);
         listenersToBeInit.remove(listener);
+        return listeners.remove(listener) ? listener : null;
+    }
+  }
+
+  public final GLEventListener removeGLEventListener(int index) throws IndexOutOfBoundsException {
+    synchronized(listenersLock) {
+        if(0>index) {
+            index = listeners.size()-1;
+        }
+        final GLEventListener listener = listeners.remove(index);
+        listenersToBeInit.remove(listener);
+        return listener;
+    }
+  }
+
+  public final int getGLEventListenerCount() {
+    synchronized(listenersLock) {
+        return listeners.size();
+    }
+  }
+
+  public final GLEventListener getGLEventListener(int index) throws IndexOutOfBoundsException {
+    synchronized(listenersLock) {
+        if(0>index) {
+            index = listeners.size()-1;
+        }
+        return listeners.get(index);
+    }
+  }
+
+  public final boolean areAllGLEventListenerInitialized() {
+    synchronized(listenersLock) {
+        return 0 == listenersToBeInit.size();
+    }
+  }
+
+  public final boolean getGLEventListenerInitState(GLEventListener listener) {
+    synchronized(listenersLock) {
+        return !listenersToBeInit.contains(listener);
+    }
+  }
+
+  public final void setGLEventListenerInitState(GLEventListener listener, boolean initialized) {
+    synchronized(listenersLock) {
+        if(initialized) {
+            listenersToBeInit.remove(listener);
+        } else {
+            listenersToBeInit.add(listener);
+        }
     }
   }
 
   /**
-   * Issues {@link javax.media.opengl.GLEventListener#dispose(javax.media.opengl.GLAutoDrawable)}
-   * to all listeners.
+   * Disposes the given {@link GLEventListener} via {@link GLEventListener#dispose(GLAutoDrawable)}
+   * if it has been initialized and added to this queue.
    * <p>
-   * Please consider using {@link #disposeGL(GLAutoDrawable, GLDrawable, GLContext, Runnable)}
-   * for correctness!
+   * If <code>remove</code> is <code>true</code>, the {@link GLEventListener} is removed from this drawable queue before disposal,
+   * otherwise marked uninitialized.
    * </p>
-   * @param drawable
+   * <p>
+   * Please consider using {@link #disposeGLEventListener(GLAutoDrawable, GLDrawable, GLContext, GLEventListener)}
+   * for correctness, i.e. encapsulating all calls w/ makeCurrent etc.
+   * </p>
+   * @param autoDrawable
+   * @param remove if true, the listener gets removed
+   * @return the disposed and/or removed listener, otherwise null if neither action is performed
+   */
+  public final GLEventListener disposeGLEventListener(GLAutoDrawable autoDrawable, GLEventListener listener, boolean remove) {
+      synchronized(listenersLock) {
+          if( remove ) {
+              if( listeners.remove(listener) ) {
+                  if( !listenersToBeInit.remove(listener) ) {
+                      listener.dispose(autoDrawable);
+                  }
+                  return listener;
+              }
+          } else {
+              if( listeners.contains(listener) && !listenersToBeInit.contains(listener) ) {
+                  listener.dispose(autoDrawable);
+                  listenersToBeInit.add(listener);
+                  return listener;
+              }
+          }
+      }
+      return null;
+  }
+
+  /**
+   * Disposes all added initialized {@link GLEventListener}s via {@link GLEventListener#dispose(GLAutoDrawable)}.
+   * <p>
+   * If <code>remove</code> is <code>true</code>, the {@link GLEventListener}s are removed from this drawable queue before disposal,
+   * otherwise maked uninitialized.
+   * </p>
+   * <p>
+   * Please consider using {@link #disposeAllGLEventListener(GLAutoDrawable, GLContext, boolean)}
+   * or {@link #disposeGL(GLAutoDrawable, GLContext, boolean)}
+   * for correctness, i.e. encapsulating all calls w/ makeCurrent etc.
+   * </p>
+   * @param autoDrawable
+   * @return the disposal count
    */
-  public final void dispose(GLAutoDrawable drawable) {
+  public final int disposeAllGLEventListener(GLAutoDrawable autoDrawable, boolean remove) {
+    int disposeCount = 0;
     synchronized(listenersLock) {
-        for (int i=0; i < listeners.size(); i++) {
-          listeners.get(i).dispose(drawable);
+        if( remove ) {
+            for (int count = listeners.size(); 0 < count && 0 < listeners.size(); count--) {
+              final GLEventListener listener = listeners.remove(0);
+              if( !listenersToBeInit.remove(listener) ) {
+                  listener.dispose(autoDrawable);
+                  disposeCount++;
+              }
+            }
+        } else {
+            for (int i = 0; i < listeners.size(); i++) {
+              final GLEventListener listener = listeners.get(i);
+              if( !listenersToBeInit.contains(listener) ) {
+                  listener.dispose(autoDrawable);
+                  listenersToBeInit.add(listener);
+                  disposeCount++;
+              }
+            }
         }
     }
+    return disposeCount;
   }
-  
-  private boolean init(GLEventListener l, GLAutoDrawable drawable, boolean sendReshape) {
-      if(listenersToBeInit.remove(l)) {
-          l.init(drawable);
-          if(sendReshape) {
-              reshape(l, drawable, 0, 0, drawable.getWidth(), drawable.getHeight(), true /* setViewport */, false);
+
+  /**
+   * Principal helper method which runs {@link #disposeGLEventListener(GLAutoDrawable, GLEventListener, boolean)}
+   * with the context made current.
+   * <p>
+   * If an {@link GLAnimatorControl} is being attached and the current thread is different
+   * than {@link GLAnimatorControl#getThread() the animator's thread}, it is paused during the operation.
+   * </p>
+   *
+   * @param autoDrawable
+   * @param context
+   * @param listener
+   * @param initAction
+   */
+  public final GLEventListener disposeGLEventListener(final GLAutoDrawable autoDrawable,
+                                                      final GLDrawable drawable,
+                                                      final GLContext context,
+                                                      final GLEventListener listener,
+                                                      final boolean remove) {
+      synchronized(listenersLock) {
+          // fast path for uninitialized listener
+          if( listenersToBeInit.contains(listener) ) {
+             if( remove ) {
+                 listenersToBeInit.remove(listener);
+                 return listeners.remove(listener) ? listener : null;
+             }
+             return null;
           }
-          return true;
       }
-      return false;
+      final boolean isPaused = isAnimatorAnimatingOnOtherThread() && animatorCtrl.pause();
+      final GLEventListener[] res = new GLEventListener[] { null };
+      final Runnable action = new Runnable() {
+          @Override
+          public void run() {
+              res[0] = disposeGLEventListener(autoDrawable, listener, remove);
+          }
+      };
+      invokeGL(drawable, context, action, nop);
+
+      if(isPaused) {
+          animatorCtrl.resume();
+      }
+      return res[0];
   }
 
-  public final void init(GLAutoDrawable drawable) {
-    synchronized(listenersLock) {
-        for (int i=0; i < listeners.size(); i++) {
-          final GLEventListener listener = listeners.get(i) ;
+  /**
+   * Principal helper method which runs {@link #disposeAllGLEventListener(GLAutoDrawable, boolean)}
+   * with the context made current.
+   * <p>
+   * If an {@link GLAnimatorControl} is being attached and the current thread is different
+   * than {@link GLAnimatorControl#getThread() the animator's thread}, it is paused during the operation.
+   * </p>
+   *
+   * @param autoDrawable
+   * @param context
+   * @param remove
+   */
+  public final void disposeAllGLEventListener(final GLAutoDrawable autoDrawable,
+                                              final GLDrawable drawable,
+                                              final GLContext context,
+                                              final boolean remove) {
 
-          // If make current ctx, invoked by invokGL(..), results in a new ctx, init gets called.
-          // This may happen not just for initial setup, but for ctx recreation due to resource change (drawable/window),
-          // hence the must always be initialized unconditional.
-          listenersToBeInit.add(listener);
+      final boolean isPaused = isAnimatorAnimatingOnOtherThread() && animatorCtrl.pause();
 
-          if ( ! init( listener, drawable, false ) ) {
-            throw new GLException("GLEventListener "+listener+" already initialized: "+drawable);
+      final Runnable action = new Runnable() {
+          @Override
+          public void run() {
+              disposeAllGLEventListener(autoDrawable, remove);
           }
+      };
+      invokeGL(drawable, context, action, nop);
+
+      if(isPaused) {
+          animatorCtrl.resume();
+      }
+  }
+
+  private final void init(GLEventListener l, GLAutoDrawable drawable, boolean sendReshape, boolean setViewport) {
+      l.init(drawable);
+      if(sendReshape) {
+          reshape(l, drawable, 0, 0, drawable.getWidth(), drawable.getHeight(), setViewport, false /* checkInit */);
+      }
+  }
+
+  /**
+   * The default init action to be called once after ctx is being created @ 1st makeCurrent().
+   * @param sendReshape set to true if the subsequent display call won't reshape, otherwise false to avoid double reshape.
+   **/
+  public final void init(GLAutoDrawable drawable, boolean sendReshape) {
+    synchronized(listenersLock) {
+        final ArrayList<GLEventListener> _listeners = listeners;
+        final int listenerCount = _listeners.size();
+        if( listenerCount > 0 ) {
+            for (int i=0; i < listenerCount; i++) {
+              final GLEventListener listener = _listeners.get(i) ;
+
+              // If make ctx current, invoked by invokGL(..), results in a new ctx, init gets called.
+              // This may happen not just for initial setup, but for ctx recreation due to resource change (drawable/window),
+              // hence it must be called unconditional, always.
+              listenersToBeInit.remove(listener); // remove if exist, avoiding dbl init
+              init( listener, drawable, sendReshape, 0==i /* setViewport */);
+            }
+        } else {
+            // Expose same GL initialization if not using GLEventListener
+            drawable.getGL().glViewport(0, 0, drawable.getWidth(), drawable.getHeight());
         }
     }
   }
 
   public final void display(GLAutoDrawable drawable) {
     displayImpl(drawable);
-    if(!execGLRunnables(drawable)) {
-        displayImpl(drawable);  
+    if( glRunnables.size()>0 && !execGLRunnables(drawable) ) { // glRunnables volatile OK; execGL.. only executed if size > 0
+        displayImpl(drawable);
     }
   }
-  private void displayImpl(GLAutoDrawable drawable) {
+  private final void displayImpl(GLAutoDrawable drawable) {
       synchronized(listenersLock) {
-          for (int i=0; i < listeners.size(); i++) {
-            final GLEventListener listener = listeners.get(i) ;
-            // GLEventListener may need to be init, 
+          final ArrayList<GLEventListener> _listeners = listeners;
+          final int listenerCount = _listeners.size();
+          for (int i=0; i < listenerCount; i++) {
+            final GLEventListener listener = _listeners.get(i) ;
+            // GLEventListener may need to be init,
             // in case this one is added after the realization of the GLAutoDrawable
-            init( listener, drawable, true ) ; 
+            if( listenersToBeInit.remove(listener) ) {
+                init( listener, drawable, true /* sendReshape */, listenersToBeInit.size() + 1 == listenerCount /* setViewport if 1st init */ );
+            }
             listener.display(drawable);
           }
       }
   }
 
-  private void reshape(GLEventListener listener, GLAutoDrawable drawable,
-                       int x, int y, int width, int height, boolean setViewport, boolean checkInit) {
+  private final void reshape(GLEventListener listener, GLAutoDrawable drawable,
+                             int x, int y, int width, int height, boolean setViewport, boolean checkInit) {
     if(checkInit) {
-        // GLEventListener may need to be init, 
-        // in case this one is added after the realization of the GLAutoDrawable      
-        init( listener, drawable, false ) ;
+        // GLEventListener may need to be init,
+        // in case this one is added after the realization of the GLAutoDrawable
+        synchronized(listenersLock) {
+            if( listenersToBeInit.remove(listener) ) {
+                listener.init(drawable);
+            }
+        }
     }
     if(setViewport) {
+        final GL gl = drawable.getGL();
+        final int glerr0 = gl.glGetError();
+        if( GL.GL_NO_ERROR != glerr0 ) {
+            System.err.println("Info: GLDrawableHelper.reshape: pre-exisiting GL error 0x"+Integer.toHexString(glerr0));
+            if(DEBUG) {
+                Thread.dumpStack();
+            }
+        }
         drawable.getGL().glViewport(x, y, width, height);
     }
     listener.reshape(drawable, x, y, width, height);
@@ -207,30 +695,51 @@ public class GLDrawableHelper {
   public final void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
     synchronized(listenersLock) {
         for (int i=0; i < listeners.size(); i++) {
-          reshape((GLEventListener) listeners.get(i), drawable, x, y, width, height, 0==i, true);
+          reshape(listeners.get(i), drawable, x, y, width, height, 0==i /* setViewport */, true /* checkInit */);
         }
     }
   }
 
-  private boolean execGLRunnables(GLAutoDrawable drawable) {
+  private final boolean execGLRunnables(GLAutoDrawable drawable) { // glRunnables.size()>0
     boolean res = true;
-    if(glRunnables.size()>0) {
+    // swap one-shot list asap
+    final ArrayList<GLRunnableTask> _glRunnables;
+    synchronized(glRunnablesLock) {
+        if(glRunnables.size()>0) {
+            _glRunnables = glRunnables;
+            glRunnables = new ArrayList<GLRunnableTask>();
+        } else {
+            _glRunnables = null;
+        }
+    }
+
+    if(null!=_glRunnables) {
+        for (int i=0; i < _glRunnables.size(); i++) {
+            res = _glRunnables.get(i).run(drawable) && res;
+        }
+    }
+    return res;
+  }
+
+  public final void flushGLRunnables() {
+    if(glRunnables.size()>0) { // volatile OK
         // swap one-shot list asap
-        ArrayList<GLRunnable> _glRunnables = null;
+        final ArrayList<GLRunnableTask> _glRunnables;
         synchronized(glRunnablesLock) {
             if(glRunnables.size()>0) {
                 _glRunnables = glRunnables;
-                glRunnables = new ArrayList<GLRunnable>();
+                glRunnables = new ArrayList<GLRunnableTask>();
+            } else {
+                _glRunnables = null;
             }
         }
-        
+
         if(null!=_glRunnables) {
             for (int i=0; i < _glRunnables.size(); i++) {
-              res = _glRunnables.get(i).run(drawable) && res;
+                _glRunnables.get(i).flush();
             }
         }
     }
-    return res;
   }
 
   public final void setAnimator(GLAnimatorControl animator) throws GLException {
@@ -248,15 +757,15 @@ public class GLDrawableHelper {
     }
   }
 
-  public final boolean isExternalAnimatorRunning() {
+  public final boolean isAnimatorStartedOnOtherThread() {
     return ( null != animatorCtrl ) ? animatorCtrl.isStarted() && animatorCtrl.getThread() != Thread.currentThread() : false ;
   }
 
-  public final boolean isAnimatorRunning() {
+  public final boolean isAnimatorStarted() {
     return ( null != animatorCtrl ) ? animatorCtrl.isStarted() : false ;
   }
 
-  public final boolean isExternalAnimatorAnimating() {
+  public final boolean isAnimatorAnimatingOnOtherThread() {
     return ( null != animatorCtrl ) ? animatorCtrl.isAnimating() && animatorCtrl.getThread() != Thread.currentThread() : false ;
   }
 
@@ -264,17 +773,35 @@ public class GLDrawableHelper {
     return ( null != animatorCtrl ) ? animatorCtrl.isAnimating() : false ;
   }
 
-  public final void invoke(GLAutoDrawable drawable, boolean wait, GLRunnable glRunnable) {
-    if( null == drawable || null == glRunnable ) {
-        return;
+  /**
+   * <p>
+   * If <code>wait</code> is <code>true</code> the call blocks until the <code>glRunnable</code>
+   * has been executed.<p>
+   * <p>
+   * If <code>wait</code> is <code>true</code> <b>and</b>
+   * {@link GLDrawable#isRealized()} returns <code>false</code> <i>or</i> {@link GLAutoDrawable#getContext()} returns <code>null</code>,
+   * the call is ignored and returns <code>false</code>.<br>
+   * This helps avoiding deadlocking the caller.
+   * </p>
+   *
+   * @param drawable the {@link GLAutoDrawable} to be used
+   * @param wait if <code>true</code> block until execution of <code>glRunnable</code> is finished, otherwise return immediatly w/o waiting
+   * @param glRunnable the {@link GLRunnable} to execute within {@link #display()}
+   * @return <code>true</code> if the {@link GLRunnable} has been processed or queued, otherwise <code>false</code>.
+   */
+  public final boolean invoke(GLAutoDrawable drawable, boolean wait, GLRunnable glRunnable) {
+    if( null == glRunnable || null == drawable ||
+        wait && ( !drawable.isRealized() || null==drawable.getContext() ) ) {
+        return false;
     }
-    Throwable throwable = null;
+
     GLRunnableTask rTask = null;
     Object rTaskLock = new Object();
+    Throwable throwable = null;
     synchronized(rTaskLock) {
-        boolean deferred;
+        final boolean deferred;
         synchronized(glRunnablesLock) {
-            deferred = isExternalAnimatorAnimating();
+            deferred = isAnimatorAnimatingOnOtherThread();
             if(!deferred) {
                 wait = false; // don't wait if exec immediatly
             }
@@ -299,6 +826,60 @@ public class GLDrawableHelper {
             }
         }
     }
+    return true;
+  }
+
+  public final boolean invoke(GLAutoDrawable drawable, boolean wait, List<GLRunnable> newGLRunnables) {
+    if( null == newGLRunnables || newGLRunnables.size() == 0 || null == drawable ||
+        wait && ( !drawable.isRealized() || null==drawable.getContext() ) ) {
+        return false;
+    }
+
+    final int count = newGLRunnables.size();
+    GLRunnableTask rTask = null;
+    Object rTaskLock = new Object();
+    Throwable throwable = null;
+    synchronized(rTaskLock) {
+        final boolean deferred;
+        synchronized(glRunnablesLock) {
+            deferred = isAnimatorAnimatingOnOtherThread() || !drawable.isRealized();
+            if(!deferred) {
+                wait = false; // don't wait if exec immediately
+            }
+            for(int i=0; i<count-1; i++) {
+                glRunnables.add( new GLRunnableTask(newGLRunnables.get(i), null, false) );
+            }
+            rTask = new GLRunnableTask(newGLRunnables.get(count-1),
+                                       wait ? rTaskLock : null,
+                                       wait  /* catch Exceptions if waiting for result */);
+            glRunnables.add(rTask);
+        }
+        if( !deferred ) {
+            drawable.display();
+        } else if( wait ) {
+            try {
+                rTaskLock.wait(); // free lock, allow execution of rTask
+            } catch (InterruptedException ie) {
+                throwable = ie;
+            }
+            if(null==throwable) {
+                throwable = rTask.getThrowable();
+            }
+            if(null!=throwable) {
+                throw new RuntimeException(throwable);
+            }
+        }
+    }
+    return true;
+  }
+
+  public final void enqueue(GLRunnable glRunnable) {
+    if( null == glRunnable) {
+        return;
+    }
+    synchronized(glRunnablesLock) {
+        glRunnables.add( new GLRunnableTask(glRunnable, null, false) );
+    }
   }
 
   public final void setAutoSwapBufferMode(boolean enable) {
@@ -309,25 +890,74 @@ public class GLDrawableHelper {
     return autoSwapBufferMode;
   }
 
+  private final String getExclusiveContextSwitchString() {
+      return 0 == exclusiveContextSwitch ? "nop" : ( 0 > exclusiveContextSwitch ? "released" : "claimed" ) ;
+  }
+
   /**
-   * @param t the thread for which context release shall be skipped, usually the animation thread,
-   *          ie. {@link Animator#getThread()}.
-   * @deprecated this is an experimental feature, 
-   *             intended for measuring performance in regards to GL context switch
-   *             and only being used if {@link #PERF_STATS} is enabled
-   *             by defining property <code>jogl.debug.GLDrawable.PerfStats</code>.
+   * Dedicates this instance's {@link GLContext} to the given thread.<br/>
+   * The thread will exclusively claim the {@link GLContext} via {@link #display()} and not release it
+   * until {@link #destroy()} or <code>setExclusiveContextThread(null)</code> has been called.
+   * <p>
+   * Default non-exclusive behavior is <i>requested</i> via <code>setExclusiveContextThread(null)</code>,
+   * which will cause the next call of {@link #display()} on the exclusive thread to
+   * release the {@link GLContext}. Only after it's async release, {@link #getExclusiveContextThread()}
+   * will return <code>null</code>.
+   * </p>
+   * <p>
+   * To release a previous made exclusive thread, a user issues <code>setExclusiveContextThread(null)</code>
+   * and may poll {@link #getExclusiveContextThread()} until it returns <code>null</code>,
+   * <i>while</i> the exclusive thread is still running.
+   * </p>
+   * <p>
+   * Note: Setting a new exclusive thread without properly releasing a previous one
+   * will throw an GLException.
+   * </p>
+   * <p>
+   * One scenario could be to dedicate the context to the {@link com.jogamp.opengl.util.AnimatorBase#getThread() animator thread}
+   * and spare redundant context switches.
+   * </p>
+   * @param t the exclusive thread to claim the context, or <code>null</code> for default operation.
+   * @return previous exclusive context thread
+   * @throws GLException If an exclusive thread is still active but a new one is attempted to be set
    */
-  public final void setSkipContextReleaseThread(Thread t) {
-    skipContextReleaseThread = t;
+  public final Thread setExclusiveContextThread(Thread t, GLContext context) throws GLException {
+    if (DEBUG) {
+      System.err.println("GLDrawableHelper.setExclusiveContextThread(): START switch "+getExclusiveContextSwitchString()+", thread "+exclusiveContextThread+" -> "+t+" -- currentThread "+Thread.currentThread());
+    }
+    final Thread oldExclusiveContextThread = exclusiveContextThread;
+    if( exclusiveContextThread == t ) {
+        exclusiveContextSwitch =  0; // keep
+    } else if( null == t ) {
+        exclusiveContextSwitch = -1; // release
+    } else {
+        exclusiveContextSwitch =  1; // claim
+        if( null != exclusiveContextThread ) {
+            throw new GLException("Release current exclusive Context Thread "+exclusiveContextThread+" first");
+        }
+        if( null != context && context.isCurrent() ) {
+            try {
+                forceNativeRelease(context);
+            } catch (Throwable ex) {
+                ex.printStackTrace();
+                throw new GLException(ex);
+            }
+        }
+        exclusiveContextThread = t;
+    }
+    if (DEBUG) {
+      System.err.println("GLDrawableHelper.setExclusiveContextThread(): END switch "+getExclusiveContextSwitchString()+", thread "+exclusiveContextThread+" -- currentThread "+Thread.currentThread());
+    }
+    return oldExclusiveContextThread;
   }
 
   /**
-   * @deprecated see {@link #setSkipContextReleaseThread(Thread)} 
+   * @see #setExclusiveContextThread(Thread, GLContext)
    */
-  public final Thread getSkipContextReleaseThread() {
-    return skipContextReleaseThread;
+  public final Thread getExclusiveContextThread() {
+    return exclusiveContextThread;
   }
-  
+
   private static final ThreadLocal<Runnable> perThreadInitAction = new ThreadLocal<Runnable>();
 
   /** Principal helper method which runs a Runnable with the context
@@ -346,104 +976,76 @@ public class GLDrawableHelper {
    * @param runnable
    * @param initAction
    */
-  public final void invokeGL(GLDrawable drawable,
-                             GLContext context,
-                             Runnable  runnable,
-                             Runnable  initAction) {
+  public final void invokeGL(final GLDrawable drawable,
+                             final GLContext context,
+                             final Runnable  runnable,
+                             final Runnable  initAction) {
     if(null==context) {
         if (DEBUG) {
-            Exception e = new GLException(Thread.currentThread().getName()+" Info: GLDrawableHelper " + this + ".invokeGL(): NULL GLContext");
+            Exception e = new GLException(getThreadName()+" Info: GLDrawableHelper " + this + ".invokeGL(): NULL GLContext");
             e.printStackTrace();
         }
         return;
     }
 
     if(PERF_STATS) {
-        invokeGLImplStats(drawable, context, runnable, initAction, null);    
+        invokeGLImplStats(drawable, context, runnable, initAction);
     } else {
-        invokeGLImpl(drawable, context, runnable, initAction, null);
+        invokeGLImpl(drawable, context, runnable, initAction);
     }
   }
 
-  /** 
-   * Principal helper method which runs {@link #dispose(GLAutoDrawable)} with the context
-   * made current and destroys the context afterwards while holding the lock.  
-   * 
+  /**
+   * Principal helper method which runs
+   * {@link #disposeAllGLEventListener(GLAutoDrawable, boolean) disposeAllGLEventListener(autoDrawable, false)}
+   * with the context made current.
+   * <p>
+   * If <code>destroyContext</code> is <code>true</code> the context is destroyed in the end while holding the lock.
+   * </p>
+   * <p>
+   * If <code>destroyContext</code> is <code>false</code> the context is natively released, i.e. released as often as locked before.
+   * </p>
    * @param autoDrawable
-   * @param drawable
    * @param context
-   * @param postAction
+   * @param destroyContext destroy context in the end while holding the lock
    */
-  public final void disposeGL(GLAutoDrawable autoDrawable,
-                              GLDrawable drawable,
-                              GLContext context,
-                              Runnable  postAction) {
-    if(PERF_STATS) {
-        invokeGLImplStats(drawable, context, null, null, autoDrawable);    
-    } else {
-        invokeGLImpl(drawable, context, null, null, autoDrawable);
-    }
-    if(null != postAction) {
-        postAction.run();
-    }
-  }
-  
-  private final void invokeGLImpl(GLDrawable drawable,
-                                  GLContext context,
-                                  Runnable  runnable,
-                                  Runnable  initAction,
-                                  GLAutoDrawable disposeAutoDrawable) {
-    final Thread currentThread = Thread.currentThread();
-    
-    final boolean isDisposeAction = null==initAction ;
-        
+  public final void disposeGL(final GLAutoDrawable autoDrawable,
+                              final GLContext context, boolean destroyContext) {
     // Support for recursive makeCurrent() calls as well as calling
     // other drawables' display() methods from within another one's
     GLContext lastContext = GLContext.getCurrent();
     Runnable  lastInitAction = null;
     if (lastContext != null) {
         if (lastContext == context) {
-            lastContext = null; // utilize recursive locking
+            lastContext = null;
         } else {
+            // utilize recursive locking
             lastInitAction = perThreadInitAction.get();
             lastContext.release();
         }
     }
-    int res = GLContext.CONTEXT_NOT_CURRENT;
-  
+
+    int res;
     try {
       res = context.makeCurrent();
-      if (res != GLContext.CONTEXT_NOT_CURRENT) {
-        if(!isDisposeAction) {
-            perThreadInitAction.set(initAction);
-            if (res == GLContext.CONTEXT_CURRENT_NEW) {
-              if (DEBUG) {
-                System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
-              }
-              initAction.run();
-            }
-            runnable.run();
-            if (autoSwapBufferMode) {
-                drawable.swapBuffers();
-            }
-        } else {
-            if(res == GLContext.CONTEXT_CURRENT_NEW) {
-                throw new GLException(currentThread.getName()+" GLDrawableHelper " + this + ".invokeGL(): Dispose case (no init action given): Native context was not created (new ctx): "+context);
-            }
-            if(listeners.size()>0) {
-                dispose(disposeAutoDrawable);
-            }
+      if (GLContext.CONTEXT_NOT_CURRENT != res) {
+        if(GLContext.CONTEXT_CURRENT_NEW == res) {
+            throw new GLException(getThreadName()+" GLDrawableHelper " + this + ".invokeGL(): Dispose case (no init action given): Native context was not created (new ctx): "+context);
+        }
+        if( listeners.size() > 0 && null != autoDrawable ) {
+            disposeAllGLEventListener(autoDrawable, false);
         }
       }
     } finally {
       try {
-          if(isDisposeAction) {
+          if(destroyContext) {
               context.destroy();
-          } else if( res != GLContext.CONTEXT_NOT_CURRENT ) {
-              context.release();
+          } else {
+              forceNativeRelease(context);
           }
+          flushGLRunnables();
       } catch (Exception e) {
-          System.err.println("Catched: "+e.getMessage());
+          System.err.println("Catched Exception on thread "+getThreadName());
           e.printStackTrace();
       }
       if (lastContext != null) {
@@ -454,99 +1056,206 @@ public class GLDrawableHelper {
       }
     }
   }
-  
-  private final void invokeGLImplStats(GLDrawable drawable,
-                                       GLContext context,
-                                       Runnable  runnable,
-                                       Runnable  initAction,
-                                       GLAutoDrawable disposeAutoDrawable) {
-    final Thread currentThread = Thread.currentThread();
-    
-    final boolean isDisposeAction = null==initAction ;
-    
-    // Support for recursive makeCurrent() calls as well as calling
-    // other drawables' display() methods from within another one's
-    int res = GLContext.CONTEXT_NOT_CURRENT;
-    GLContext lastContext = GLContext.getCurrent();
-    Runnable  lastInitAction = null;
-    if (lastContext != null) {
-        if (lastContext == context) {
-            if( currentThread == skipContextReleaseThread ) {
-                res = GLContext.CONTEXT_CURRENT;
-            } // else: utilize recursive locking
-            lastContext = null;
-        } else {
-            lastInitAction = perThreadInitAction.get();
-            lastContext.release();
-        }
-    }
-  
-    long t0 = System.currentTimeMillis();
-    long tdA = 0; // makeCurrent
-    long tdR = 0; // render time
-    long tdS = 0; // swapBuffers
-    long tdX = 0; // release
-    boolean ctxClaimed = false;
-    boolean ctxReleased = false;
-    boolean ctxDestroyed = false;    
-    try {
-      if (res == GLContext.CONTEXT_NOT_CURRENT) {
-          res = context.makeCurrent();
-          ctxClaimed = true;
-      }
-      if (res != GLContext.CONTEXT_NOT_CURRENT) {
-        if(!isDisposeAction) {
-            perThreadInitAction.set(initAction);
-            if (res == GLContext.CONTEXT_CURRENT_NEW) {
-              if (DEBUG) {
-                System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
-              }
-              initAction.run();
-            }
-            tdR = System.currentTimeMillis();        
-            tdA = tdR - t0; // makeCurrent
-            runnable.run();
-            tdS = System.currentTimeMillis();
-            tdR = tdS - tdR; // render time
-            if (autoSwapBufferMode) {
-                drawable.swapBuffers();
-                tdX = System.currentTimeMillis();
-                tdS = tdX - tdS; // swapBuffers
-            }
-        } else {
-            if(res == GLContext.CONTEXT_CURRENT_NEW) {
-                throw new GLException(currentThread.getName()+" GLDrawableHelper " + this + ".invokeGL(): Dispose case (no init action given): Native context was not created (new ctx): "+context);
-            }
-            if(listeners.size()>0) {
-                dispose(disposeAutoDrawable);
-            }
-        }
+
+  private final void invokeGLImpl(final GLDrawable drawable,
+          final GLContext context,
+          final Runnable  runnable,
+          final Runnable  initAction) {
+      final Thread currentThread = Thread.currentThread();
+
+      // Exclusive Cases:
+      //   1: lock - unlock  : default
+      //   2: lock - -       : exclusive,    not locked yet
+      //   3: -    - -       : exclusive,    already locked
+      //   4: -    - unlock  : ex-exclusive, already locked
+      final boolean _isExclusiveThread, _releaseExclusiveThread;
+      if( null != exclusiveContextThread) {
+          if( currentThread == exclusiveContextThread ) {
+              _releaseExclusiveThread = 0 > exclusiveContextSwitch;
+              _isExclusiveThread = !_releaseExclusiveThread;
+              exclusiveContextSwitch = 0;
+          } else {
+              // Exclusive thread usage, but on other thread
+              return;
+          }
+      } else {
+          _releaseExclusiveThread = false;
+          _isExclusiveThread = false;
       }
-    } finally {
+
+      // Support for recursive makeCurrent() calls as well as calling
+      // other drawables' display() methods from within another one's
+      int res = GLContext.CONTEXT_NOT_CURRENT;
+      GLContext lastContext = GLContext.getCurrent();
+      Runnable  lastInitAction = null;
+      if (lastContext != null) {
+          if (lastContext == context) {
+              res = GLContext.CONTEXT_CURRENT;
+              lastContext = null;
+          } else {
+              // utilize recursive locking
+              lastInitAction = perThreadInitAction.get();
+              lastContext.release();
+          }
+      }
+
       try {
-          if(isDisposeAction) {
-              context.destroy();
-              ctxDestroyed = true;
-          } else if( res != GLContext.CONTEXT_NOT_CURRENT &&
-                     (null == skipContextReleaseThread || currentThread != skipContextReleaseThread) ) {
-              context.release();
-              ctxReleased = true;
+          final boolean releaseContext;
+          if( GLContext.CONTEXT_NOT_CURRENT == res ) {
+              res = context.makeCurrent();
+              releaseContext = !_isExclusiveThread;
+          } else {
+              releaseContext = _releaseExclusiveThread;
+          }
+          if (GLContext.CONTEXT_NOT_CURRENT != res) {
+              try {
+                  perThreadInitAction.set(initAction);
+                  if (GLContext.CONTEXT_CURRENT_NEW == res) {
+                      if (DEBUG) {
+                          System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
+                      }
+                      initAction.run();
+                  }
+                  runnable.run();
+                  if ( autoSwapBufferMode ) {
+                      drawable.swapBuffers();
+                  }
+              } finally {
+                  if( _releaseExclusiveThread ) {
+                      exclusiveContextThread = null;
+                      if (DEBUG) {
+                          System.err.println("GLDrawableHelper.invokeGL() - Release ExclusiveContextThread -- currentThread "+Thread.currentThread());
+                      }
+                  }
+                  if( releaseContext ) {
+                      try {
+                          context.release();
+                      } catch (Exception e) {
+                          System.err.println("Catched Exception on thread "+getThreadName());
+                          e.printStackTrace();
+                      }
+                  }
+              }
+          }
+      } finally {
+          if (lastContext != null) {
+              final int res2 = lastContext.makeCurrent();
+              if (null != lastInitAction && res2 == GLContext.CONTEXT_CURRENT_NEW) {
+                  lastInitAction.run();
+              }
           }
-      } catch (Exception e) {
-          System.err.println("Catched: "+e.getMessage());
-          e.printStackTrace();
+      }
+  }
+
+  private final void invokeGLImplStats(final GLDrawable drawable,
+          final GLContext context,
+          final Runnable  runnable,
+          final Runnable  initAction) {
+      final Thread currentThread = Thread.currentThread();
+
+      // Exclusive Cases:
+      //   1: lock - unlock  : default
+      //   2: lock - -       : exclusive, not locked yet
+      //   3: -    - -       : exclusive, already locked
+      //   4: -    - unlock  : ex-exclusive, already locked
+      final boolean _isExclusiveThread, _releaseExclusiveThread;
+      if( null != exclusiveContextThread) {
+          if( currentThread == exclusiveContextThread ) {
+              _releaseExclusiveThread = 0 > exclusiveContextSwitch;
+              _isExclusiveThread = !_releaseExclusiveThread;
+          } else {
+              // Exclusive thread usage, but on other thread
+              return;
+          }
+      } else {
+          _releaseExclusiveThread = false;
+          _isExclusiveThread = false;
       }
 
-      tdX = System.currentTimeMillis() - tdX; // release / destroy
+      // Support for recursive makeCurrent() calls as well as calling
+      // other drawables' display() methods from within another one's
+      int res = GLContext.CONTEXT_NOT_CURRENT;
+      GLContext lastContext = GLContext.getCurrent();
+      Runnable  lastInitAction = null;
       if (lastContext != null) {
-        final int res2 = lastContext.makeCurrent();
-        if (null != lastInitAction && res2 == GLContext.CONTEXT_CURRENT_NEW) {
-          lastInitAction.run();
-        }
+          if (lastContext == context) {
+              res = GLContext.CONTEXT_CURRENT;
+              lastContext = null;
+          } else {
+              // utilize recursive locking
+              lastInitAction = perThreadInitAction.get();
+              lastContext.release();
+          }
       }
-    }
-    long td = System.currentTimeMillis() - t0;
-    System.err.println("td0 "+td+"ms, fps "+(1.0/(td/1000.0))+", td-makeCurrent: "+tdA+"ms, td-render "+tdR+"ms, td-swap "+tdS+"ms, td-release "+tdX+"ms, ctx claimed: "+ctxClaimed+", ctx release: "+ctxReleased+", ctx destroyed "+ctxDestroyed);
+
+      long t0 = System.currentTimeMillis();
+      long tdA = 0; // makeCurrent
+      long tdR = 0; // render time
+      long tdS = 0; // swapBuffers
+      long tdX = 0; // release
+      boolean ctxClaimed = false;
+      boolean ctxReleased = false;
+      boolean ctxDestroyed = false;
+      try {
+          final boolean releaseContext;
+          if( GLContext.CONTEXT_NOT_CURRENT == res ) {
+              res = context.makeCurrent();
+              releaseContext = !_isExclusiveThread;
+              ctxClaimed = true;
+          } else {
+              releaseContext = _releaseExclusiveThread;
+          }
+          if (GLContext.CONTEXT_NOT_CURRENT != res) {
+              try {
+                  perThreadInitAction.set(initAction);
+                  if (GLContext.CONTEXT_CURRENT_NEW == res) {
+                      if (DEBUG) {
+                          System.err.println("GLDrawableHelper " + this + ".invokeGL(): Running initAction");
+                      }
+                      initAction.run();
+                  }
+                  tdR = System.currentTimeMillis();
+                  tdA = tdR - t0; // makeCurrent
+                  runnable.run();
+                  tdS = System.currentTimeMillis();
+                  tdR = tdS - tdR; // render time
+                  if ( autoSwapBufferMode ) {
+                      drawable.swapBuffers();
+                      tdX = System.currentTimeMillis();
+                      tdS = tdX - tdS; // swapBuffers
+                  }
+              } finally {
+                  if( _releaseExclusiveThread ) {
+                      exclusiveContextSwitch = 0;
+                      exclusiveContextThread = null;
+                      if (DEBUG) {
+                          System.err.println("GLDrawableHelper.invokeGL() - Release ExclusiveContextThread -- currentThread "+Thread.currentThread());
+                      }
+                  }
+                  if( releaseContext ) {
+                      try {
+                          context.release();
+                          ctxReleased = true;
+                      } catch (Exception e) {
+                          System.err.println("Catched Exception on thread "+getThreadName());
+                          e.printStackTrace();
+                      }
+                  }
+              }
+          }
+      } finally {
+          tdX = System.currentTimeMillis() - tdX; // release / destroy
+          if (lastContext != null) {
+              final int res2 = lastContext.makeCurrent();
+              if (null != lastInitAction && res2 == GLContext.CONTEXT_CURRENT_NEW) {
+                  lastInitAction.run();
+              }
+          }
+      }
+      long td = System.currentTimeMillis() - t0;
+      System.err.println("td0 "+td+"ms, fps "+(1.0/(td/1000.0))+", td-makeCurrent: "+tdA+"ms, td-render "+tdR+"ms, td-swap "+tdS+"ms, td-release "+tdX+"ms, ctx claimed: "+ctxClaimed+", ctx release: "+ctxReleased+", ctx destroyed "+ctxDestroyed);
   }
-    
+
+  protected static String getThreadName() { return Thread.currentThread().getName(); }
+
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
index 36f17e5a1..d11274560 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -42,6 +42,8 @@ package jogamp.opengl;
 
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
@@ -50,173 +52,301 @@ import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
 public abstract class GLDrawableImpl implements GLDrawable {
-  protected static final boolean DEBUG = Debug.debug("GLDrawable");
+  protected static final boolean DEBUG = GLDrawableFactoryImpl.DEBUG;
 
-  protected GLDrawableImpl(GLDrawableFactory factory,
-                           NativeSurface comp,
-                           boolean realized) {
+  protected GLDrawableImpl(GLDrawableFactory factory, NativeSurface comp, boolean realized) {
+      this(factory, comp, (GLCapabilitiesImmutable) comp.getGraphicsConfiguration().getRequestedCapabilities(), realized);
+  }
+
+  protected GLDrawableImpl(GLDrawableFactory factory, NativeSurface comp, GLCapabilitiesImmutable requestedCapabilities, boolean realized) {
       this.factory = factory;
       this.surface = comp;
       this.realized = realized;
-      this.requestedCapabilities = (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getRequestedCapabilities();
+      this.requestedCapabilities = requestedCapabilities;
   }
 
-  /** 
+  /**
    * Returns the DynamicLookupHelper
    */
   public abstract GLDynamicLookupHelper getGLDynamicLookupHelper();
 
-  public GLDrawableFactoryImpl getFactoryImpl() {
+  public final GLDrawableFactoryImpl getFactoryImpl() {
     return (GLDrawableFactoryImpl) getFactory();
   }
 
-  /** For offscreen GLDrawables (pbuffers and "pixmap" drawables),
-      indicates that native resources should be reclaimed. */
-  public void destroy() {
-      surface.getGraphicsConfiguration().getScreen().getDevice().lock();
-      try {
-          destroyImpl();
-      } finally {
-          surface.getGraphicsConfiguration().getScreen().getDevice().unlock();
-      }
-  }
-  protected void destroyImpl() {
-    throw new GLException("Should not call this (should only be called for offscreen GLDrawables)");
-  }
-
+  @Override
   public final void swapBuffers() throws GLException {
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)surface.getGraphicsConfiguration().getChosenCapabilities();
-    if ( caps.getDoubleBuffered() ) {
-        if(!surface.surfaceSwap()) {
-            int lockRes = lockSurface(); // it's recursive, so it's ok within [makeCurrent .. release]
-            if (NativeSurface.LOCK_SURFACE_NOT_READY == lockRes) {
-                return;
-            }
-            try {
-                if (NativeSurface.LOCK_SURFACE_CHANGED == lockRes) {
-                    updateHandle();
+    if( !realized ) { // volatile OK (locked below)
+        return; // destroyed already
+    }
+    final int lockRes = lockSurface(); // it's recursive, so it's ok within [makeCurrent .. release]
+    if (NativeSurface.LOCK_SURFACE_NOT_READY == lockRes) {
+        return;
+    }
+    try {
+        if( realized ) { // volatile OK
+            final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)surface.getGraphicsConfiguration().getChosenCapabilities();
+            if ( caps.getDoubleBuffered() ) {
+                if(!surface.surfaceSwap()) {
+                    swapBuffersImpl(true);
+                }
+            } else {
+                final GLContext ctx = GLContext.getCurrent();
+                if(null!=ctx && ctx.getGLDrawable()==this) {
+                    ctx.getGL().glFlush();
                 }
-                swapBuffersImpl();
-            } finally {
-                unlockSurface();
+                swapBuffersImpl(false);
             }
         }
-    } else {
-        GLContext ctx = GLContext.getCurrent();
-        if(null!=ctx && ctx.getGLDrawable()==this) { 
-            ctx.getGL().glFinish();
-        }
+    } finally {
+        unlockSurface();
     }
     surface.surfaceUpdated(this, surface, System.currentTimeMillis());
   }
-  protected abstract void swapBuffersImpl();
 
-  public static String toHexString(long hex) {
+  /**
+   * Platform and implementation depending surface swap.
+   * <p>The surface is locked.</p>
+   * <p>
+   * If <code>doubleBuffered</code> is <code>true</code>,
+   * an actual platform dependent surface swap shall be executed.
+   * </p>
+   * <p>
+   * If <code>doubleBuffered</code> is <code>false</code>,
+   * {@link GL#glFlush()} has been called already and
+   * the implementation may execute implementation specific code.
+   * </p>
+   * @param doubleBuffered indicates whether double buffering is enabled, see above.
+   */
+  protected abstract void swapBuffersImpl(boolean doubleBuffered);
+
+  public final static String toHexString(long hex) {
     return "0x" + Long.toHexString(hex);
   }
 
-  public GLProfile getGLProfile() {
+  @Override
+  public final GLProfile getGLProfile() {
     return requestedCapabilities.getGLProfile();
   }
 
+  @Override
   public GLCapabilitiesImmutable getChosenGLCapabilities() {
     return  (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getChosenCapabilities();
   }
 
-  public GLCapabilitiesImmutable getRequestedGLCapabilities() {
+  public final GLCapabilitiesImmutable getRequestedGLCapabilities() {
     return requestedCapabilities;
   }
 
+  @Override
   public NativeSurface getNativeSurface() {
     return surface;
   }
 
-  /** called with locked surface @ setRealized(false) */ 
+  /**
+   * called with locked surface @ setRealized(false) or @ lockSurface(..) when surface changed
+   * <p>
+   * Must be paired w/ {@link #createHandle()}.
+   * </p>
+   */
   protected void destroyHandle() {}
-  
-  /** called with locked surface @ setRealized(true) or @ lockSurface(..) when surface changed */ 
-  protected void updateHandle() {}
 
+  /**
+   * called with locked surface @ setRealized(true) or @ lockSurface(..) when surface changed
+   * <p>
+   * Must be paired w/ {@link #destroyHandle()}.
+   * </p>
+   */
+  protected void createHandle() {}
+
+  @Override
   public long getHandle() {
     return surface.getSurfaceHandle();
   }
 
-  public GLDrawableFactory getFactory() {
+  @Override
+  public final GLDrawableFactory getFactory() {
     return factory;
   }
 
-  public final synchronized void setRealized(boolean realizedArg) {
-    if ( realized != realizedArg ) {
+  @Override
+  public final void setRealized(boolean realizedArg) {
+    if ( realized != realizedArg ) { // volatile: OK (locked below)
+        final boolean isProxySurface = surface instanceof ProxySurface;
         if(DEBUG) {
-            System.err.println(getThreadName() + ": setRealized: "+getClass().getSimpleName()+" "+realized+" -> "+realizedArg);
+            System.err.println(getThreadName() + ": setRealized: drawable "+getClass().getSimpleName()+", surface "+surface.getClass().getSimpleName()+", isProxySurface "+isProxySurface+": "+realized+" -> "+realizedArg);
+            Thread.dumpStack();
         }
-        realized = realizedArg;
         AbstractGraphicsDevice aDevice = surface.getGraphicsConfiguration().getScreen().getDevice();
         if(realizedArg) {
-            if(NativeSurface.LOCK_SURFACE_NOT_READY >= lockSurface()) {
-                throw new GLException("GLDrawableImpl.setRealized(true): already realized, but surface not ready (lockSurface)");
+            if(isProxySurface) {
+                ((ProxySurface)surface).createNotify();
+            }
+            if(NativeSurface.LOCK_SURFACE_NOT_READY >= surface.lockSurface()) {
+                throw new GLException("GLDrawableImpl.setRealized(true): Surface not ready (lockSurface)");
             }
         } else {
             aDevice.lock();
         }
-        try {            
-            setRealizedImpl();
-            if(realizedArg) {
-                updateHandle();
-            } else {
-                destroyHandle();
+        try {
+            if ( realized != realizedArg ) { // volatile: OK
+                realized = realizedArg;
+                if(realizedArg) {
+                    setRealizedImpl();
+                    createHandle();
+                } else {
+                    destroyHandle();
+                    setRealizedImpl();
+                }
             }
         } finally {
             if(realizedArg) {
-                unlockSurface();
+                surface.unlockSurface();
             } else {
                 aDevice.unlock();
+                if(isProxySurface) {
+                    ((ProxySurface)surface).destroyNotify();
+                }
             }
         }
     } else if(DEBUG) {
         System.err.println(getThreadName() + ": setRealized: "+getClass().getName()+" "+this.realized+" == "+realizedArg);
     }
   }
+
+  /**
+   * Platform specific realization of drawable
+   */
   protected abstract void setRealizedImpl();
-  
-  public synchronized boolean isRealized() {
+
+  /**
+   * Callback for special implementations, allowing
+   * <ul>
+   *   <li>to associate bound context to this drawable (bound == true)
+   *       or to remove such association (bound == false).</li>
+   *   <li>to trigger GLContext/GLDrawable related lifecycle: <code>construct</code>, <code>destroy</code>.</li>
+   * </ul>
+   * <p>
+   * If <code>bound</code> is <code>true</code>, the context is current and being newly associated w/ this drawable.
+   * </p>
+   * <p>
+   * If <code>bound</code> is <code>false</code>, the context is still current and will be unbound (released and destroyed, or simply disassociated).
+   * </p>
+   * <p>
+   * Being called by {@link GLContextImpl#associateDrawable(boolean)}.
+   * </p>
+   * @param ctx the just bounded or unbounded context
+   * @param bound if <code>true</code> create an association, otherwise remove it
+   */
+  protected void associateContext(GLContext ctx, boolean bound) { }
+
+  /**
+   * Callback for special implementations, allowing GLContext to trigger GL related lifecycle: <code>makeCurrent</code>, <code>release</code>.
+   * <p>
+   * If <code>current</code> is <code>true</code>, the context has just been made current.
+   * </p>
+   * <p>
+   * If <code>current</code> is <code>false</code>, the context is still current and will be release after this method returns.
+   * </p>
+   * <p>
+   * Being called by {@link GLContextImpl#contextMadeCurrent(boolean)}.
+   * </p>
+   * @see #associateContext(GLContext, boolean)
+   */
+  protected void contextMadeCurrent(GLContext glc, boolean current) { }
+
+  /** Callback for special implementations, allowing GLContext to fetch a custom default render framebuffer. Defaults to zero.*/
+  protected int getDefaultDrawFramebuffer() { return 0; }
+  /** Callback for special implementations, allowing GLContext to fetch a custom default read framebuffer. Defaults to zero. */
+  protected int getDefaultReadFramebuffer() { return 0; }
+  /** Callback for special implementations, allowing GLContext to fetch a custom default read buffer of current framebuffer. */
+  protected int getDefaultReadBuffer(GL gl, boolean hasDedicatedDrawableRead) {
+      if( gl.isGLES() || hasDedicatedDrawableRead || getChosenGLCapabilities().getDoubleBuffered() ) {
+          // Note-1: Neither ES1 nor ES2 supports selecting the read buffer via glReadBuffer
+          // Note-2: ES3 only supports GL_BACK, GL_NONE or GL_COLOR_ATTACHMENT0+i
+          return GL.GL_BACK;
+      }
+      return GL.GL_FRONT ;
+  }
+
+  @Override
+  public final boolean isRealized() {
     return realized;
   }
 
+  @Override
   public int getWidth() {
     return surface.getWidth();
   }
-  
+
+  @Override
   public int getHeight() {
     return surface.getHeight();
   }
 
-  public int lockSurface() throws GLException {
-    return surface.lockSurface();
+  @Override
+  public boolean isGLOriented() {
+      return true;
   }
 
-  public void unlockSurface() {
-    surface.unlockSurface();
+  /**
+   * {@link NativeSurface#lockSurface() Locks} the underlying windowing toolkit's {@link NativeSurface surface}.
+   * <p>
+   * <i>If</i> drawable is {@link #setRealized(boolean) realized},
+   * the {@link #getHandle() drawable handle} is valid after successfully {@link NativeSurface#lockSurface() locking}
+   * it's {@link NativeSurface surface} until being {@link #unlockSurface() unlocked}.
+   * </p>
+   * <p>
+   * In case the {@link NativeSurface surface} has changed as indicated by it's
+   * {@link NativeSurface#lockSurface() lock} result {@link NativeSurface#LOCK_SURFACE_CHANGED},
+   * the implementation is required to update this information as needed within it's implementation.
+   * </p>
+   *
+   * @see NativeSurface#lockSurface()
+   * @see #getHandle()
+   */
+  public final int lockSurface() throws GLException {
+    final int lockRes = surface.lockSurface();
+    if ( NativeSurface.LOCK_SURFACE_CHANGED == lockRes && realized ) {
+        // Update the drawable handle, in case the surface handle has changed.
+        final long _handle1 = getHandle();
+        destroyHandle();
+        createHandle();
+        final long _handle2 = getHandle();
+        if(DEBUG) {
+            if( _handle1 != _handle2) {
+                System.err.println(getThreadName() + ": Drawable handle changed: "+toHexString(_handle1)+" -> "+toHexString(_handle2));
+            }
+        }
+    }
+    return lockRes;
+
   }
 
-  public boolean isSurfaceLocked() {
-    return surface.isSurfaceLocked();
+  /**
+   * {@link NativeSurface#unlockSurface() Unlocks} the underlying windowing toolkit {@link NativeSurface surface},
+   * which may render the {@link #getHandle() drawable handle} invalid.
+   *
+   * @see NativeSurface#unlockSurface()
+   * @see #getHandle()
+   */
+  public final void unlockSurface() {
+    surface.unlockSurface();
   }
 
+  @Override
   public String toString() {
     return getClass().getSimpleName()+"[Realized "+isRealized()+
                 ",\n\tFactory   "+getFactory()+
-                ",\n\thandle    "+toHexString(getHandle())+
-                ",\n\tWindow    "+getNativeSurface()+"]";
+                ",\n\tHandle    "+toHexString(getHandle())+
+                ",\n\tSurface   "+getNativeSurface()+"]";
   }
 
-  protected static String getThreadName() {
-    return Thread.currentThread().getName();
-  }
-  
-  protected GLDrawableFactory factory;
-  protected NativeSurface surface;
-  protected GLCapabilitiesImmutable requestedCapabilities;
+  protected static String getThreadName() { return Thread.currentThread().getName(); }
+
+  protected final GLDrawableFactory factory;
+  protected final NativeSurface surface;
+  protected final GLCapabilitiesImmutable requestedCapabilities;
 
   // Indicates whether the surface (if an onscreen context) has been
   // realized. Plausibly, before the surface is realized the JAWT
@@ -228,6 +358,6 @@ public abstract class GLDrawableImpl implements GLDrawable {
   // result of calling show() on the main thread. To work around this
   // we prevent any JAWT or OpenGL operations from being done until
   // addNotify() is called on the surface.
-  protected boolean realized;
+  protected volatile boolean realized;
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java
index 4c82fc2b3..39de3200d 100644
--- a/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,12 +20,12 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl;
 
 import com.jogamp.common.os.DynamicLibraryBundle;
@@ -36,17 +36,31 @@ public abstract class GLDynamicLibraryBundleInfo implements DynamicLibraryBundle
     protected GLDynamicLibraryBundleInfo() {
     }
 
-    /** default **/
+    /**
+     * Returns <code>true</code>,
+     * since we might load a desktop GL library and allow symbol access to subsequent libs.
+     * <p>
+     * This respects old DRI requirements:
+     * <pre>
+     * http://dri.sourceforge.net/doc/DRIuserguide.html
+     * </pre>
+     * </p>
+     */
     @Override
-    public boolean shallLinkGlobal() { return false; }
+    public final boolean shallLinkGlobal() { return true; }
 
-    /** default **/
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Returns <code>false</code>.
+     * </p>
+     */
     @Override
     public boolean shallLookupGlobal() { return false; }
 
     @Override
-    public RunnableExecutor getLibLoaderExecutor() {
+    public final RunnableExecutor getLibLoaderExecutor() {
         return DynamicLibraryBundle.getDefaultRunnableExecutor();
-    }    
+    }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/GLDynamicLookupHelper.java b/src/jogl/classes/jogamp/opengl/GLDynamicLookupHelper.java
index d2dac8148..421f06205 100644
--- a/src/jogl/classes/jogamp/opengl/GLDynamicLookupHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDynamicLookupHelper.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,12 +20,12 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl;
 
 import com.jogamp.common.os.DynamicLibraryBundle;
@@ -36,7 +36,7 @@ public class GLDynamicLookupHelper extends DynamicLibraryBundle {
         super(info);
     }
 
-    public GLDynamicLibraryBundleInfo getGLBundleInfo() { return (GLDynamicLibraryBundleInfo) getBundleInfo(); }
+    public final GLDynamicLibraryBundleInfo getGLBundleInfo() { return (GLDynamicLibraryBundleInfo) getBundleInfo(); }
 
     /** NOP per default */
     public boolean loadGLULibrary() { return false; }
diff --git a/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
new file mode 100644
index 000000000..6f5fa3eed
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
@@ -0,0 +1,593 @@
+package jogamp.opengl;
+
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowException;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLCapabilities;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLFBODrawable;
+
+import com.jogamp.common.util.VersionUtil;
+import com.jogamp.nativewindow.MutableGraphicsConfiguration;
+import com.jogamp.opengl.FBObject;
+import com.jogamp.opengl.FBObject.Attachment;
+import com.jogamp.opengl.FBObject.Colorbuffer;
+import com.jogamp.opengl.FBObject.TextureAttachment;
+import com.jogamp.opengl.JoglVersion;
+
+/**
+ * {@link FBObject} offscreen GLDrawable implementation, i.e. {@link GLFBODrawable}.
+ * <p>
+ * It utilizes the context lifecycle hook {@link #contextRealized(GLContext, boolean)}
+ * to initialize the {@link FBObject} instance.
+ * </p>
+ * <p>
+ * It utilizes the context current hook {@link #contextMadeCurrent(GLContext, boolean) contextMadeCurrent(context, true)}
+ * to {@link FBObject#bind(GL) bind} the FBO.
+ * </p>
+ * See {@link GLFBODrawable} for double buffering details.
+ *
+ * @see GLDrawableImpl#contextRealized(GLContext, boolean)
+ * @see GLDrawableImpl#contextMadeCurrent(GLContext, boolean)
+ * @see GLDrawableImpl#getDefaultDrawFramebuffer()
+ * @see GLDrawableImpl#getDefaultReadFramebuffer()
+ */
+public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
+    protected static final boolean DEBUG;
+    protected static final boolean DEBUG_SWAP;
+
+    static {
+        Debug.initSingleton();
+        DEBUG = GLDrawableImpl.DEBUG || Debug.debug("FBObject");
+        DEBUG_SWAP = DEBUG || Debug.isPropertyDefined("jogl.debug.FBObject.Swap", true);
+    }
+
+    private final GLDrawableImpl parent;
+    private GLCapabilitiesImmutable origParentChosenCaps;
+
+    private boolean initialized;
+    private int texUnit;
+    private int samples;
+    private boolean fboResetQuirk;
+
+    private FBObject[] fbos;
+    private int fboIBack;  // points to GL_BACK buffer
+    private int fboIFront; // points to GL_FRONT buffer
+    private int pendingFBOReset = -1;
+    /** Indicated whether the FBO is bound. */
+    private boolean fboBound;
+    /** Indicated whether the FBO is swapped, resets to false after makeCurrent -> contextMadeCurrent. */
+    private boolean fboSwapped;
+
+    /** dump fboResetQuirk info only once pre ClassLoader and only in DEBUG mode */
+    private static volatile boolean resetQuirkInfoDumped = false;
+
+    /** number of FBOs for double buffering. TODO: Possible to configure! */
+    private static final int bufferCount = 2;
+
+    // private DoubleBufferMode doubleBufferMode; // TODO: Add or remove TEXTURE (only) DoubleBufferMode support
+
+    private SwapBufferContext swapBufferContext;
+
+    public static interface SwapBufferContext {
+        public void swapBuffers(boolean doubleBuffered);
+    }
+
+    /**
+     * @param factory
+     * @param parent
+     * @param surface
+     * @param fboCaps the requested FBO capabilities
+     * @param textureUnit
+     */
+    protected GLFBODrawableImpl(GLDrawableFactoryImpl factory, GLDrawableImpl parent, NativeSurface surface,
+                                GLCapabilitiesImmutable fboCaps, int textureUnit) {
+        super(factory, surface, fboCaps, false);
+        this.initialized = false;
+
+        this.parent = parent;
+        this.origParentChosenCaps = getChosenGLCapabilities(); // just to avoid null, will be reset at initialize(..)
+        this.texUnit = textureUnit;
+        this.samples = fboCaps.getNumSamples();
+        fboResetQuirk = false;
+
+        // default .. // TODO: Add or remove TEXTURE (only) DoubleBufferMode support
+        // this.doubleBufferMode = ( samples > 0 || fboCaps.getDoubleBuffered() ) ? DoubleBufferMode.FBO : DoubleBufferMode.NONE ;
+
+        this.swapBufferContext = null;
+    }
+
+    private final void initialize(boolean realize, GL gl) {
+        if( !initialized && !realize ) {
+            if( DEBUG ) {
+                System.err.println("GLFBODrawableImpl.initialize(): WARNING - Already unrealized!");
+                Thread.dumpStack();
+            }
+            return; // NOP, no exception for de-init twice or no init!
+        }
+        if( initialized == realize ) {
+            throw new IllegalStateException("initialize already in state "+realize+": "+this);
+        }
+        if(realize) {
+            final GLCapabilities chosenFBOCaps = (GLCapabilities) getChosenGLCapabilities(); // cloned at setRealized(true)
+
+            final int maxSamples = gl.getMaxRenderbufferSamples();
+            {
+                final int newSamples = samples <= maxSamples ? samples : maxSamples;
+                if(DEBUG) {
+                    System.err.println("GLFBODrawableImpl.initialize(): samples "+samples+" -> "+newSamples+"/"+maxSamples);
+                }
+                samples = newSamples;
+            }
+
+            final int fbosN;
+            if(samples > 0) {
+                fbosN = 1;
+            } else if( chosenFBOCaps.getDoubleBuffered() ) {
+                fbosN = bufferCount;
+            } else {
+                fbosN = 1;
+            }
+
+            fbos = new FBObject[fbosN];
+            fboIBack = 0;                // head
+            fboIFront = fbos.length - 1; // tail
+
+            for(int i=0; i<fbosN; i++) {
+                fbos[i] = new FBObject();
+                fbos[i].reset(gl, getWidth(), getHeight(), samples, false);
+                if(fbos[i].getNumSamples() != samples) {
+                    throw new InternalError("Sample number mismatch: "+samples+", fbos["+i+"] "+fbos[i]);
+                }
+                if(samples > 0) {
+                    fbos[i].attachColorbuffer(gl, 0, chosenFBOCaps.getAlphaBits()>0);
+                } else {
+                    fbos[i].attachTexture2D(gl, 0, chosenFBOCaps.getAlphaBits()>0);
+                }
+                if( chosenFBOCaps.getStencilBits() > 0 ) {
+                    fbos[i].attachRenderbuffer(gl, Attachment.Type.DEPTH_STENCIL, 24);
+                } else {
+                    fbos[i].attachRenderbuffer(gl, Attachment.Type.DEPTH, 24);
+                }
+            }
+            fbos[fboIFront].resetSamplingSink(gl);
+
+            fbos[0].formatToGLCapabilities(chosenFBOCaps);
+            chosenFBOCaps.setDoubleBuffered( chosenFBOCaps.getDoubleBuffered() || samples > 0 );
+        } else {
+            for(int i=0; i<fbos.length; i++) {
+                fbos[i].destroy(gl);
+            }
+            fbos=null;
+        }
+        fboBound = false;
+        fboSwapped = false;
+        pendingFBOReset = -1;
+        initialized = realize;
+
+        if(DEBUG) {
+            System.err.println("GLFBODrawableImpl.initialize("+realize+"): "+this);
+            Thread.dumpStack();
+        }
+    }
+
+    public final void setSwapBufferContext(SwapBufferContext sbc) {
+        swapBufferContext = sbc;
+    }
+
+    private final void reset(GL gl, int idx, int width, int height, int samples, int alphaBits, int stencilBits) {
+        if( !fboResetQuirk ) {
+            try {
+                fbos[idx].reset(gl, width, height, samples, false);
+                if(fbos[idx].getNumSamples() != samples) {
+                    throw new InternalError("Sample number mismatch: "+samples+", fbos["+idx+"] "+fbos[idx]);
+                }
+                return;
+            } catch (GLException e) {
+                fboResetQuirk = true;
+                if(DEBUG) {
+                    if(!resetQuirkInfoDumped) {
+                        resetQuirkInfoDumped = true;
+                        System.err.println("GLFBODrawable: FBO Reset failed: "+e.getMessage());
+                        System.err.println("GLFBODrawable: Enabling FBOResetQuirk, due to GL driver bug.");
+                        final JoglVersion joglVersion = JoglVersion.getInstance();
+                        if(DEBUG) {
+                            System.err.println(VersionUtil.getPlatformInfo());
+                            System.err.println(joglVersion.toString());
+                            System.err.println(JoglVersion.getGLInfo(gl, null));
+                        } else {
+                            System.err.println(joglVersion.getBriefOSGLBuildInfo(gl, null));
+                        }
+                        e.printStackTrace();
+                    }
+                }
+                // 'fallthrough' intended
+            }
+        }
+        // resetQuirk fallback
+        fbos[idx].destroy(gl);
+        fbos[idx] = new FBObject();
+        fbos[idx].reset(gl, getWidth(), getHeight(), samples, false);
+        if(fbos[idx].getNumSamples() != samples) {
+            throw new InternalError("Sample number mismatch: "+samples+", fbos["+idx+"] "+fbos[idx]);
+        }
+        if(samples > 0) {
+            fbos[idx].attachColorbuffer(gl, 0, alphaBits>0);
+        } else {
+            fbos[idx].attachTexture2D(gl, 0, alphaBits>0);
+        }
+        if( stencilBits > 0 ) {
+            fbos[idx].attachRenderbuffer(gl, Attachment.Type.DEPTH_STENCIL, 24);
+        } else {
+            fbos[idx].attachRenderbuffer(gl, Attachment.Type.DEPTH, 24);
+        }
+    }
+
+    private final void reset(GL gl, int newSamples) throws GLException {
+        if(!initialized) {
+            // NOP if not yet initializes
+            return;
+        }
+
+        final GLContext curContext = GLContext.getCurrent();
+        final GLContext ourContext = gl.getContext();
+        final boolean ctxSwitch = null != curContext && curContext != ourContext;
+        if(DEBUG) {
+            System.err.println("GLFBODrawableImpl.reset(newSamples "+newSamples+"): BEGIN - ctxSwitch "+ctxSwitch+", "+this);
+            Thread.dumpStack();
+        }
+        Throwable tFBO = null;
+        Throwable tGL = null;
+        ourContext.makeCurrent();
+        gl.glFinish(); // sync GL command stream
+        fboBound = false; // clear bound-flag immediatly, caused by contextMadeCurrent(..) - otherwise we would swap @ release
+        fboSwapped = false;
+        try {
+            final int maxSamples = gl.getMaxRenderbufferSamples();
+            newSamples = newSamples <= maxSamples ? newSamples : maxSamples;
+
+            if(0==samples && 0<newSamples || 0<samples && 0==newSamples) {
+                // MSAA on/off switch
+                if(DEBUG) {
+                    System.err.println("GLFBODrawableImpl.reset(): samples [on/off] reconfig: "+samples+" -> "+newSamples+"/"+maxSamples);
+                }
+                initialize(false, gl);
+                samples = newSamples;
+                initialize(true, gl);
+            } else {
+                if(DEBUG) {
+                    System.err.println("GLFBODrawableImpl.reset(): simple reconfig: "+samples+" -> "+newSamples+"/"+maxSamples);
+                }
+                final int nWidth = getWidth();
+                final int nHeight = getHeight();
+                samples = newSamples;
+                pendingFBOReset = ( 1 < fbos.length ) ? fboIFront : -1; // pending-front reset only w/ double buffering (or zero samples)
+                final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getChosenCapabilities();
+                for(int i=0; i<fbos.length; i++) {
+                    if( pendingFBOReset != i ) {
+                        reset(gl, i, nWidth, nHeight, samples, caps.getAlphaBits(), caps.getStencilBits());
+                    }
+                }
+                final GLCapabilities fboCapsNative = (GLCapabilities) surface.getGraphicsConfiguration().getChosenCapabilities();
+                fbos[0].formatToGLCapabilities(fboCapsNative);
+            }
+        } catch (Throwable t) {
+            tFBO = t;
+        } finally {
+            try {
+                ourContext.release();
+                if(ctxSwitch) {
+                    curContext.makeCurrent();
+                }
+            } catch (Throwable t) {
+                tGL = t;
+            }
+        }
+        if(null != tFBO) {
+            throw new GLException("GLFBODrawableImpl.reset(..) FBObject.reset(..) exception", tFBO);
+        }
+        if(null != tGL) {
+            throw new GLException("GLFBODrawableImpl.reset(..) GLContext.release() exception", tGL);
+        }
+        if(DEBUG) {
+            System.err.println("GLFBODrawableImpl.reset(newSamples "+newSamples+"): END "+this);
+        }
+    }
+
+    //
+    // GLDrawable
+    //
+
+    @Override
+    public final GLContext createContext(GLContext shareWith) {
+        final GLContext ctx = parent.createContext(shareWith);
+        ctx.setGLDrawable(this, false);
+        return ctx;
+    }
+
+    //
+    // GLDrawableImpl
+    //
+
+    @Override
+    public final GLDynamicLookupHelper getGLDynamicLookupHelper() {
+        return parent.getGLDynamicLookupHelper();
+    }
+
+    @Override
+    protected final int getDefaultDrawFramebuffer() { return initialized ? fbos[fboIBack].getWriteFramebuffer() : 0; }
+
+    @Override
+    protected final int getDefaultReadFramebuffer() { return initialized ? fbos[fboIFront].getReadFramebuffer() : 0; }
+
+    @Override
+    protected final int getDefaultReadBuffer(GL gl, boolean hasDedicatedDrawableRead) {
+        return initialized ? fbos[fboIFront].getDefaultReadBuffer() : GL.GL_COLOR_ATTACHMENT0 ;
+    }
+
+    @Override
+    protected final void setRealizedImpl() {
+        final MutableGraphicsConfiguration msConfig = (MutableGraphicsConfiguration) surface.getGraphicsConfiguration();
+        if(realized) {
+            parent.setRealized(true);
+            origParentChosenCaps = (GLCapabilitiesImmutable) msConfig.getChosenCapabilities();
+            final GLCapabilities chosenFBOCaps = (GLCapabilities) origParentChosenCaps.cloneMutable();
+            chosenFBOCaps.copyFrom(getRequestedGLCapabilities());
+            msConfig.setChosenCapabilities(chosenFBOCaps);
+        } else {
+            msConfig.setChosenCapabilities(origParentChosenCaps);
+            parent.setRealized(false);
+        }
+    }
+
+    @Override
+    protected void associateContext(GLContext glc, boolean bound) {
+        initialize(bound, glc.getGL());
+    }
+
+    @Override
+    protected final void contextMadeCurrent(GLContext glc, boolean current) {
+        final GL gl = glc.getGL();
+        if(current) {
+            if( !initialized ) {
+                throw new GLException("Not initialized: "+this);
+            }
+            fbos[fboIBack].bind(gl);
+            fboBound = true;
+            fboSwapped = false;
+        } else if( fboBound && !fboSwapped ) {
+            swapFBOImpl(glc);
+            swapFBOImplPost(glc);
+            fboBound=false;
+            fboSwapped=true;
+            if(DEBUG_SWAP) {
+                System.err.println("Post FBO swap(@release): done");
+            }
+        }
+    }
+
+    @Override
+    protected void swapBuffersImpl(boolean doubleBuffered) {
+        final GLContext ctx = GLContext.getCurrent();
+        boolean doPostSwap;
+        if( null != ctx && ctx.getGLDrawable() == this && fboBound ) {
+            swapFBOImpl(ctx);
+            doPostSwap = true;
+            fboSwapped = true;
+            if(DEBUG_SWAP) {
+                System.err.println("Post FBO swap(@swap): done");
+            }
+        } else {
+            doPostSwap = false;
+        }
+        if( null != swapBufferContext ) {
+            swapBufferContext.swapBuffers(doubleBuffered);
+        }
+        if(doPostSwap) {
+            swapFBOImplPost(ctx);
+        }
+    }
+
+    private final void swapFBOImplPost(GLContext glc) {
+        // Safely reset the previous front FBO - after completing propagating swap
+        if(0 <= pendingFBOReset) {
+            final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getChosenCapabilities();
+            reset(glc.getGL(), pendingFBOReset, getWidth(), getHeight(), samples, caps.getAlphaBits(), caps.getStencilBits());
+            pendingFBOReset = -1;
+        }
+    }
+
+    private final void swapFBOImpl(GLContext glc) {
+        final GL gl = glc.getGL();
+        fbos[fboIBack].markUnbound(); // fast path, use(gl,..) is called below
+
+        if(DEBUG) {
+            int _fboIFront = ( fboIFront + 1 ) % fbos.length;
+            if(_fboIFront != fboIBack) { throw new InternalError("XXX: "+_fboIFront+"!="+fboIBack); }
+        }
+        fboIFront = fboIBack;
+        fboIBack  = ( fboIBack  + 1 ) % fbos.length;
+
+        final Colorbuffer colorbuffer = samples > 0 ? fbos[fboIFront].getSamplingSink() : fbos[fboIFront].getColorbuffer(0);
+        final TextureAttachment texAttachment;
+        if(colorbuffer instanceof TextureAttachment) {
+            texAttachment = (TextureAttachment) colorbuffer;
+        } else {
+            if(null == colorbuffer) {
+                throw new GLException("Front colorbuffer is null: samples "+samples+", "+this);
+            } else {
+                throw new GLException("Front colorbuffer is not a texture: "+colorbuffer.getClass().getName()+": samples "+samples+", "+colorbuffer+", "+this);
+            }
+        }
+        gl.glActiveTexture(GL.GL_TEXTURE0 + texUnit);
+        fbos[fboIFront].use(gl, texAttachment);
+
+        /* Included in above use command:
+                gl.glBindFramebuffer(GL2GL3.GL_DRAW_FRAMEBUFFER, fbos[fboIBack].getDrawFramebuffer());
+                gl.glBindFramebuffer(GL2GL3.GL_READ_FRAMEBUFFER, fbos[fboIFront].getReadFramebuffer());
+        } */
+
+        if(DEBUG_SWAP) {
+            System.err.println("Post FBO swap(X): fboI back "+fboIBack+", front "+fboIFront+", num "+fbos.length);
+        }
+    }
+
+    //
+    // GLFBODrawable
+    //
+
+    @Override
+    public final boolean isInitialized() {
+        return initialized;
+    }
+
+    @Override
+    public final void resetSize(GL gl) throws GLException {
+        reset(gl, samples);
+    }
+
+    @Override
+    public final int getTextureUnit() { return texUnit; }
+
+    @Override
+    public final void setTextureUnit(int u) { texUnit = u; }
+
+    @Override
+    public final int getNumSamples() { return samples; }
+
+    @Override
+    public void setNumSamples(GL gl, int newSamples) throws GLException {
+        if(samples != newSamples) {
+            reset(gl, newSamples);
+        }
+    }
+
+    @Override
+    public final int setNumBuffers(int bufferCount) throws GLException {
+        // FIXME: Implement
+        return bufferCount;
+    }
+
+    @Override
+    public final int getNumBuffers() {
+        return bufferCount;
+    }
+
+    /** // TODO: Add or remove TEXTURE (only) DoubleBufferMode support
+    @Override
+    public final DoubleBufferMode getDoubleBufferMode() {
+        return doubleBufferMode;
+    }
+
+    @Override
+    public final void setDoubleBufferMode(DoubleBufferMode mode) throws GLException {
+        if(initialized) {
+            throw new GLException("Not allowed past initialization: "+this);
+        }
+        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getChosenCapabilities();
+        if(0 == samples && caps.getDoubleBuffered() && DoubleBufferMode.NONE != mode) {
+            doubleBufferMode = mode;
+        }
+    } */
+
+    @Override
+    public FBObject getFBObject(int bufferName) throws IllegalArgumentException {
+        if(!initialized) {
+            return null;
+        }
+        final FBObject res;
+        switch(bufferName) {
+            case GL.GL_FRONT:
+                if( samples > 0 ) {
+                    res = fbos[0].getSamplingSinkFBO();
+                } else {
+                    res = fbos[fboIFront];
+                }
+                break;
+            case GL.GL_BACK:
+                res = fbos[fboIBack];
+                break;
+            default:
+                throw new IllegalArgumentException(illegalBufferName+toHexString(bufferName));
+        }
+        return res;
+    }
+
+    @Override
+    public final TextureAttachment getTextureBuffer(int bufferName) throws IllegalArgumentException {
+        if(!initialized) {
+            return null;
+        }
+        final TextureAttachment res;
+        switch(bufferName) {
+            case GL.GL_FRONT:
+                if( samples > 0 ) {
+                    res = fbos[0].getSamplingSink();
+                } else {
+                    res = (TextureAttachment) fbos[fboIFront].getColorbuffer(0);
+                }
+                break;
+            case GL.GL_BACK:
+                if( samples > 0 ) {
+                    throw new IllegalArgumentException("Cannot access GL_BACK buffer of MSAA FBO: "+this);
+                } else {
+                    res = (TextureAttachment) fbos[fboIBack].getColorbuffer(0);
+                }
+                break;
+            default:
+                throw new IllegalArgumentException(illegalBufferName+toHexString(bufferName));
+        }
+        return res;
+    }
+    private static final String illegalBufferName = "Only GL_FRONT and GL_BACK buffer are allowed, passed ";
+
+    @Override
+    public String toString() {
+        return getClass().getSimpleName()+"[Initialized "+initialized+", realized "+isRealized()+", texUnit "+texUnit+", samples "+samples+
+                ",\n\tFactory   "+getFactory()+
+                ",\n\tHandle    "+toHexString(getHandle())+
+                ",\n\tCaps      "+surface.getGraphicsConfiguration().getChosenCapabilities()+
+                ",\n\tfboI back "+fboIBack+", front "+fboIFront+", num "+(initialized ? fbos.length : 0)+
+                ",\n\tFBO front read "+getDefaultReadFramebuffer()+", "+getFBObject(GL.GL_FRONT)+
+                ",\n\tFBO back  write "+getDefaultDrawFramebuffer()+", "+getFBObject(GL.GL_BACK)+
+                ",\n\tSurface   "+surface+
+                "]";
+    }
+
+    public static class ResizeableImpl extends GLFBODrawableImpl implements GLFBODrawable.Resizeable {
+        protected ResizeableImpl(GLDrawableFactoryImpl factory, GLDrawableImpl parent, ProxySurface surface,
+                                 GLCapabilitiesImmutable fboCaps, int textureUnit) {
+            super(factory, parent, surface, fboCaps, textureUnit);
+        }
+
+        @Override
+        public final void setSize(GLContext context, int newWidth, int newHeight) throws NativeWindowException, GLException {
+            if(DEBUG) {
+                System.err.println("GLFBODrawableImpl.ResizeableImpl setSize: ("+getThreadName()+"): "+newWidth+"x"+newHeight+" - surfaceHandle 0x"+Long.toHexString(getNativeSurface().getSurfaceHandle()));
+            }
+            int lockRes = lockSurface();
+            if (NativeSurface.LOCK_SURFACE_NOT_READY >= lockRes) {
+                throw new NativeWindowException("Could not lock surface: "+this);
+            }
+            try {
+                // propagate new size
+                final ProxySurface ps = (ProxySurface) getNativeSurface();
+                final UpstreamSurfaceHook ush = ps.getUpstreamSurfaceHook();
+                if(ush instanceof UpstreamSurfaceHook.MutableSize) {
+                    ((UpstreamSurfaceHook.MutableSize)ush).setSize(newWidth, newHeight);
+                } else {
+                    throw new InternalError("GLFBODrawableImpl.ResizableImpl's ProxySurface doesn't hold a UpstreamSurfaceHookMutableSize but "+ush.getClass().getName()+", "+ps+", ush");
+                }
+                if( null != context && context.isCreated() ) {
+                    resetSize(context.getGL());
+                }
+            } finally {
+                unlockSurface();
+            }
+        }
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationFactory.java
index 6fe9f080c..5c6b475b2 100644
--- a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationFactory.java
@@ -38,7 +38,7 @@ import javax.media.opengl.DefaultGLCapabilitiesChooser;
 public abstract class GLGraphicsConfigurationFactory extends GraphicsConfigurationFactory {
 
     protected static int chooseCapabilities(CapabilitiesChooser chooser, CapabilitiesImmutable capsRequested,
-                                            List /*<CapabilitiesImmutable>*/ availableCaps, int recommendedIndex) {
+                                            List<? extends CapabilitiesImmutable> availableCaps, int recommendedIndex) {
         if (null == capsRequested) {
             throw new NativeWindowException("Null requested capabilities");
         }
diff --git a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
index d7958c7f1..702fb77de 100644
--- a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
+++ b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
@@ -28,17 +28,22 @@
 
 package jogamp.opengl;
 
-import java.util.ArrayList;
-
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLProfile;
+
+import com.jogamp.opengl.GLRendererQuirks;
 
 public class GLGraphicsConfigurationUtil {
     public static final String NV_coverage_sample = "NV_coverage_sample";
     public static final int WINDOW_BIT  = 1 << 0;
     public static final int BITMAP_BIT  = 1 << 1;
     public static final int PBUFFER_BIT = 1 << 2;
-    public static final int ALL_BITS    = WINDOW_BIT | BITMAP_BIT | PBUFFER_BIT ;
+    public static final int FBO_BIT     = 1 << 3; // generic bit must be mapped to native one at impl. level
+    public static final int ALL_BITS    = WINDOW_BIT | BITMAP_BIT | PBUFFER_BIT | FBO_BIT ;
 
     public static final StringBuilder winAttributeBits2String(StringBuilder sb, int winattrbits) {
         if(null==sb) {
@@ -61,74 +66,184 @@ public class GLGraphicsConfigurationUtil {
                 sb.append(", ");
             }
             sb.append("PBUFFER");
+            seperator=true;
+        }
+        if( 0 != ( FBO_BIT & winattrbits )  )  {
+            if(seperator) {
+                sb.append(", ");
+            }
+            sb.append("FBO");
         }
         return sb;
     }
 
     /**
-     * @return bitmask representing the input boolean in exclusive or logic, ie only one bit will be set
-     */
-    public static final int getWinAttributeBits(boolean isOnscreen, boolean isPBuffer) {
+    public static final int getWinAttributeBits(boolean isOnscreen, boolean isFBO, boolean isPBuffer, boolean isBitmap) {
         int winattrbits = 0;
         if(isOnscreen) {
             winattrbits |= WINDOW_BIT;
-        } else if (!isPBuffer) {
+        }
+        if(isFBO) {
+            winattrbits |= FBO_BIT;
+        }
+        if(isPBuffer ){
+            winattrbits |= PBUFFER_BIT;
+        }
+        if(isBitmap) {
             winattrbits |= BITMAP_BIT;
+        }
+        return winattrbits;
+    }
+    public static final int getWinAttributeBits(GLCapabilitiesImmutable caps) {
+        return getWinAttributeBits(caps.isOnscreen(), caps.isFBO(), caps.isPBuffer(), caps.isBitmap());
+    } */
+
+    /**
+     * @return bitmask representing the input boolean in exclusive or logic, ie only one bit will be set.
+     */
+    public static final int getExclusiveWinAttributeBits(boolean isOnscreen, boolean isFBO, boolean isPBuffer, boolean isBitmap) {
+        final int winattrbits;
+        if(isOnscreen) {
+            winattrbits = WINDOW_BIT;
+        } else if(isFBO) {
+            winattrbits = FBO_BIT;
+        } else if(isPBuffer ){
+            winattrbits = PBUFFER_BIT;
+        } else if(isBitmap) {
+            winattrbits = BITMAP_BIT;
         } else {
-            winattrbits |= PBUFFER_BIT;
+            throw new InternalError("Empty bitmask");
         }
         return winattrbits;
     }
 
     /**
-     * @see #getWinAttributeBits(boolean, boolean)
+     * @see #getExclusiveWinAttributeBits(boolean, boolean, boolean, boolean)
      */
-    public static final int getWinAttributeBits(GLCapabilitiesImmutable caps) {
-        return getWinAttributeBits(caps.isOnscreen(), caps.isPBuffer());
+    public static final int getExclusiveWinAttributeBits(GLCapabilitiesImmutable caps) {
+        return getExclusiveWinAttributeBits(caps.isOnscreen(), caps.isFBO(), caps.isPBuffer(), caps.isBitmap());
     }
 
-    @SuppressWarnings({ "rawtypes", "unchecked" })
-    public static final boolean addGLCapabilitiesPermutations(ArrayList capsBucket, GLCapabilitiesImmutable temp, int winattrbits) {
-        int preSize = capsBucket.size();
-        if( 0 != ( WINDOW_BIT & winattrbits )  )  {
-            GLCapabilities cpy  = (GLCapabilities) temp.cloneMutable();
-            cpy.setOnscreen(true);
-            capsBucket.add(cpy);
-        }
-        if( 0 != ( PBUFFER_BIT & winattrbits )  )  {
-            GLCapabilities cpy  = (GLCapabilities) temp.cloneMutable();
-            cpy.setPBuffer(true);
-            capsBucket.add(cpy);
+    public static final GLCapabilities fixWinAttribBitsAndHwAccel(AbstractGraphicsDevice device, int winattrbits, GLCapabilities caps) {
+        caps.setBitmap  ( 0 != ( BITMAP_BIT  & winattrbits ) );
+        caps.setPBuffer ( 0 != ( PBUFFER_BIT & winattrbits ) );
+        caps.setFBO     ( 0 != ( FBO_BIT     & winattrbits ) );
+        // we reflect availability semantics, hence setting onscreen at last (maybe overwritten above)!
+        caps.setOnscreen( 0 != ( WINDOW_BIT  & winattrbits ) );
+
+        final int accel = GLContext.isHardwareRasterizer( device, caps.getGLProfile() );
+        if(0 == accel && caps.getHardwareAccelerated() ) {
+            caps.setHardwareAccelerated(false);
         }
-        if( 0 != ( BITMAP_BIT & winattrbits )  )  {
-            GLCapabilities cpy  = (GLCapabilities) temp.cloneMutable();
-            cpy.setOnscreen(false);
-            cpy.setPBuffer(false);
-            capsBucket.add(cpy);
+
+        return caps;
+    }
+
+    /**
+     * Fixes the requested  {@link GLCapabilitiesImmutable} according to on- and offscreen usage.
+     * <p>
+     * No modification will be made for onscreen usage, for offscreen usage see
+     * {@link #fixOffscreenGLCapabilities(GLCapabilitiesImmutable, GLDrawableFactory, AbstractGraphicsDevice)}.
+     * </p>
+     * @param capsRequested the requested {@link GLCapabilitiesImmutable}
+     * @param factory the {@link GLDrawableFactory} used to validate the requested capabilities and later used to create the drawable.
+     * @param device the device on which the drawable will be created, maybe null for the {@link GLDrawableFactory#getDefaultDevice() default device}.
+     * @return either the given requested {@link GLCapabilitiesImmutable} instance if no modifications were required, or a modified {@link GLCapabilitiesImmutable} instance.
+     */
+    public static GLCapabilitiesImmutable fixGLCapabilities(GLCapabilitiesImmutable capsRequested,
+                                                            GLDrawableFactory factory, AbstractGraphicsDevice device) {
+        if( !capsRequested.isOnscreen() ) {
+            return fixOffscreenGLCapabilities(capsRequested, factory, device);
         }
-        return capsBucket.size() > preSize;
+        return capsRequested;
     }
 
-    public static GLCapabilitiesImmutable fixGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean pbufferAvailable)
+    public static GLCapabilitiesImmutable fixOnscreenGLCapabilities(GLCapabilitiesImmutable capsRequested)
     {
-        if( !capsRequested.isOnscreen() ) {
-            return fixOffScreenGLCapabilities(capsRequested, pbufferAvailable);
+        if( !capsRequested.isOnscreen() || capsRequested.isFBO() || capsRequested.isPBuffer() || capsRequested.isBitmap() ) {
+            // fix caps ..
+            final GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
+            caps2.setBitmap  (false);
+            caps2.setPBuffer (false);
+            caps2.setFBO     (false);
+            caps2.setOnscreen(true);
+            return caps2;
         }
         return capsRequested;
     }
 
-    public static GLCapabilitiesImmutable fixOffScreenGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean pbufferAvailable)
+    public static GLCapabilitiesImmutable fixOffscreenBitOnly(GLCapabilitiesImmutable capsRequested)
     {
-        if( capsRequested.getDoubleBuffered() ||
-            capsRequested.isOnscreen() ||
-            ( !pbufferAvailable && capsRequested.isPBuffer() ) )
+        if( capsRequested.isOnscreen() ) {
+            // fix caps ..
+            final GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
+            caps2.setOnscreen(false);
+            return caps2;
+        }
+        return capsRequested;
+    }
+
+    /**
+     * Fixes the requested  {@link GLCapabilitiesImmutable} according to:
+     * <ul>
+     *   <li>offscreen usage</li>
+     *   <li>availability of FBO, PBuffer, Bitmap</li>
+     *   <li>{@link GLRendererQuirks}</li>
+     * </ul>
+     * @param capsRequested the requested {@link GLCapabilitiesImmutable}
+     * @param factory the {@link GLDrawableFactory} used to validate the requested capabilities and later used to create the drawable.
+     * @param device the device on which the drawable will be created, maybe null for the {@link GLDrawableFactory#getDefaultDevice() default device}.
+     * @return either the given requested {@link GLCapabilitiesImmutable} instance if no modifications were required, or a modified {@link GLCapabilitiesImmutable} instance.
+     */
+    public static GLCapabilitiesImmutable fixOffscreenGLCapabilities(GLCapabilitiesImmutable capsRequested,
+                                                                     GLDrawableFactory factory, AbstractGraphicsDevice device) {
+        if(null == device) {
+            device = factory.getDefaultDevice();
+        }
+        final GLProfile glp = capsRequested.getGLProfile();
+        final boolean fboAvailable = GLContext.isFBOAvailable(device, glp);
+        final boolean pbufferAvailable = factory.canCreateGLPbuffer(device, glp);
+
+        final GLRendererQuirks glrq = factory.getRendererQuirks(device);
+        final boolean bitmapAvailable;
+        final boolean doubleBufferAvailable;
+
+        if(null != glrq) {
+            bitmapAvailable = !glrq.exist(GLRendererQuirks.NoOffscreenBitmap);
+            if( capsRequested.getDoubleBuffered() &&
+                ( capsRequested.isPBuffer() && glrq.exist(GLRendererQuirks.NoDoubleBufferedPBuffer) ) ||
+                ( capsRequested.isBitmap() && glrq.exist(GLRendererQuirks.NoDoubleBufferedBitmap) ) ) {
+                doubleBufferAvailable = false;
+            } else {
+                doubleBufferAvailable = true;
+            }
+        } else {
+            bitmapAvailable = true;
+            doubleBufferAvailable = true;
+        }
+
+        final boolean auto = !( fboAvailable     && capsRequested.isFBO()     ) &&
+                             !( pbufferAvailable && capsRequested.isPBuffer() ) &&
+                             !( bitmapAvailable  && capsRequested.isBitmap()  ) ;
+
+        final boolean useFBO     =                           fboAvailable     && ( auto || capsRequested.isFBO()     ) ;
+        final boolean usePbuffer = !useFBO                && pbufferAvailable && ( auto || capsRequested.isPBuffer() ) ;
+        final boolean useBitmap  = !useFBO && !usePbuffer && bitmapAvailable  && ( auto || capsRequested.isBitmap()  ) ;
+
+        if( capsRequested.isOnscreen() ||
+            useFBO != capsRequested.isFBO() ||
+            usePbuffer != capsRequested.isPBuffer() ||
+            useBitmap != capsRequested.isBitmap() ||
+            !doubleBufferAvailable && capsRequested.getDoubleBuffered() )
         {
             // fix caps ..
-            GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
-            caps2.setDoubleBuffered(false); // FIXME DBLBUFOFFSCRN
+            final GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
             caps2.setOnscreen(false);
-            if(caps2.isPBuffer() && !pbufferAvailable) {
-                caps2.setPBuffer(false);
+            caps2.setFBO( useFBO );
+            caps2.setPBuffer( usePbuffer );
+            caps2.setBitmap( useBitmap );
+            if( !doubleBufferAvailable ) {
+                caps2.setDoubleBuffered(false);
             }
             return caps2;
         }
@@ -137,28 +252,81 @@ public class GLGraphicsConfigurationUtil {
 
     public static GLCapabilitiesImmutable fixGLPBufferGLCapabilities(GLCapabilitiesImmutable capsRequested)
     {
-        if( capsRequested.getDoubleBuffered() || capsRequested.isOnscreen() || !capsRequested.isPBuffer()) {
+        if( capsRequested.isOnscreen() ||
+            !capsRequested.isPBuffer() ||
+            capsRequested.isFBO() )
+        {
             // fix caps ..
-            GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
-            caps2.setDoubleBuffered(false); // FIXME DBLBUFOFFSCRN - we don't need to be single buffered ..
+            final GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
             caps2.setOnscreen(false);
+            caps2.setFBO(false);
             caps2.setPBuffer(true);
+            caps2.setBitmap(false);
             return caps2;
         }
         return capsRequested;
     }
 
-    public static GLCapabilitiesImmutable fixOpaqueGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean isOpaque)
+    /** Fix opaque setting while preserve alpha bits */
+    public static GLCapabilities fixOpaqueGLCapabilities(GLCapabilities capsRequested, boolean isOpaque)
     {
-        GLCapabilities caps2 = null;
-        
         if( capsRequested.isBackgroundOpaque() != isOpaque) {
-            // fix caps ..
-            caps2 = (GLCapabilities) capsRequested.cloneMutable();
-            caps2.setBackgroundOpaque(isOpaque);
+            final int alphaBits = capsRequested.getAlphaBits();
+            capsRequested.setBackgroundOpaque(isOpaque);
+            capsRequested.setAlphaBits(alphaBits);
+        }
+        return capsRequested;
+    }
+
+    /** Fix double buffered setting */
+    public static GLCapabilitiesImmutable fixDoubleBufferedGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean doubleBuffered)
+    {
+        if( capsRequested.getDoubleBuffered() != doubleBuffered) {
+            final GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
+            caps2.setDoubleBuffered(doubleBuffered);
             return caps2;
         }
         return capsRequested;
     }
-    
+
+    public static GLCapabilitiesImmutable clipRGBAGLCapabilities(GLCapabilitiesImmutable caps, boolean allowRGB555, boolean allowAlpha)
+    {
+        final int iR = caps.getRedBits();
+        final int iG = caps.getGreenBits();
+        final int iB = caps.getBlueBits();
+        final int iA = caps.getAlphaBits();
+        final int oR = clipColor(iR, allowRGB555);
+        final int oG = clipColor(iG, allowRGB555);
+        final int oB = clipColor(iB, allowRGB555);
+        final int oA = ( allowAlpha && 0 < iA ) ? oR : 0 ; // align alpha to red if requested and allowed
+        if( iR != oR || iG != oG || iB != oB || iA != oA ) {
+            final GLCapabilities caps2 = (GLCapabilities) caps.cloneMutable();
+            caps2.setRedBits(oR);
+            caps2.setGreenBits(oG);
+            caps2.setBlueBits(oB);
+            caps2.setAlphaBits(oA);
+            return caps2;
+        }
+        return caps;
+    }
+
+    public static int clipColor(final int compIn, final boolean allowRGB555) {
+        final int compOut;
+        if( 5 < compIn || !allowRGB555 ) {
+            compOut = 8;
+        } else {
+            compOut = 5;
+        }
+        return compOut;
+    }
+
+    public static GLCapabilitiesImmutable fixGLProfile(GLCapabilitiesImmutable caps, GLProfile glp)
+    {
+        if( caps.getGLProfile() != glp ) {
+            final GLCapabilities caps2 = (GLCapabilities) caps.cloneMutable();
+            caps2.setGLProfile(glp);
+            return caps2;
+        }
+        return caps;
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLOffscreenAutoDrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLOffscreenAutoDrawableImpl.java
new file mode 100644
index 000000000..345f08e4c
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLOffscreenAutoDrawableImpl.java
@@ -0,0 +1,140 @@
+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl;
+
+import javax.media.nativewindow.NativeWindowException;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLOffscreenAutoDrawable;
+
+import com.jogamp.common.util.locks.RecursiveLock;
+import com.jogamp.opengl.FBObject;
+import com.jogamp.opengl.GLAutoDrawableDelegate;
+
+import jogamp.opengl.GLFBODrawableImpl;
+
+public class GLOffscreenAutoDrawableImpl extends GLAutoDrawableDelegate implements GLOffscreenAutoDrawable {
+
+    /**
+     * @param drawable a valid {@link GLDrawable}, may not be {@link GLDrawable#isRealized() realized} yet.
+     * @param context a valid {@link GLContext},
+     *                may not have been made current (created) yet,
+     *                may not be associated w/ <code>drawable<code> yet,
+     *                may be <code>null</code> for lazy initialization at 1st {@link #display()}.
+     * @param upstreamWidget optional UI element holding this instance, see {@link #getUpstreamWidget()}.
+     * @param lock optional upstream lock, may be null
+     */
+    public GLOffscreenAutoDrawableImpl(GLDrawable drawable, GLContext context, Object upstreamWidget, RecursiveLock lock) {
+        super(drawable, context, upstreamWidget, true, lock);
+    }
+
+    @Override
+    public void setSize(int newWidth, int newHeight) throws NativeWindowException, GLException {
+        this.defaultWindowResizedOp(newWidth, newHeight);
+    }
+
+    public static class FBOImpl extends GLOffscreenAutoDrawableImpl implements GLOffscreenAutoDrawable.FBO {
+        /**
+         * @param drawable a valid {@link GLDrawable}, may not be {@link GLDrawable#isRealized() realized} yet.
+         * @param context a valid {@link GLContext},
+         *                may not have been made current (created) yet,
+         *                may not be associated w/ <code>drawable<code> yet,
+         *                may be <code>null</code> for lazy initialization
+         * @param upstreamWidget optional UI element holding this instance, see {@link #getUpstreamWidget()}.
+         * @param lock optional upstream lock, may be null
+         */
+        public FBOImpl(GLFBODrawableImpl drawable, GLContext context, Object upstreamWidget, RecursiveLock lock) {
+            super(drawable, context, upstreamWidget, lock);
+        }
+
+        @Override
+        public boolean isInitialized() {
+            return ((GLFBODrawableImpl)drawable).isInitialized();
+        }
+
+        @Override
+        public final int getTextureUnit() {
+            return ((GLFBODrawableImpl)drawable).getTextureUnit();
+        }
+
+        @Override
+        public final void setTextureUnit(int unit) {
+            ((GLFBODrawableImpl)drawable).setTextureUnit(unit);
+        }
+
+        @Override
+        public final int getNumSamples() {
+            return ((GLFBODrawableImpl)drawable).getNumSamples();
+        }
+
+        @Override
+        public final void setNumSamples(GL gl, int newSamples) throws GLException {
+            ((GLFBODrawableImpl)drawable).setNumSamples(gl, newSamples);
+            windowRepaintOp();
+        }
+
+        @Override
+        public final int setNumBuffers(int bufferCount) throws GLException {
+            return ((GLFBODrawableImpl)drawable).setNumBuffers(bufferCount);
+        }
+
+        @Override
+        public final int getNumBuffers() {
+            return ((GLFBODrawableImpl)drawable).getNumBuffers();
+        }
+
+        /** // TODO: Add or remove TEXTURE (only) DoubleBufferMode support
+        @Override
+        public DoubleBufferMode getDoubleBufferMode() {
+            return ((GLFBODrawableImpl)drawable).getDoubleBufferMode();
+        }
+
+        @Override
+        public void setDoubleBufferMode(DoubleBufferMode mode) throws GLException {
+            ((GLFBODrawableImpl)drawable).setDoubleBufferMode(mode);
+        } */
+
+        @Override
+        public final FBObject getFBObject(int bufferName) {
+            return ((GLFBODrawableImpl)drawable).getFBObject(bufferName);
+        }
+
+        @Override
+        public final FBObject.TextureAttachment getTextureBuffer(int bufferName) {
+            return ((GLFBODrawableImpl)drawable).getTextureBuffer(bufferName);
+        }
+
+        @Override
+        public void resetSize(GL gl) throws GLException {
+            ((GLFBODrawableImpl)drawable).resetSize(gl);
+        }
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java b/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java
index 0f4f7f8e2..c32957b86 100644
--- a/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,283 +29,77 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl;
 
-import com.jogamp.common.util.locks.LockFactory;
-import com.jogamp.common.util.locks.RecursiveLock;
-
-import javax.media.nativewindow.AbstractGraphicsDevice;
-import javax.media.nativewindow.NativeSurface;
-import javax.media.opengl.GL;
-import javax.media.opengl.GLAnimatorControl;
-import javax.media.opengl.GLCapabilitiesImmutable;
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLDrawableFactory;
-import javax.media.opengl.GLEventListener;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLPbuffer;
-import javax.media.opengl.GLProfile;
-import javax.media.opengl.GLRunnable;
 
-/** Platform-independent class exposing pbuffer functionality to
-    applications. This class is not exposed in the public API as it
-    would probably add no value; however it implements the GLDrawable
-    interface so can be interacted with via its display() method. */
+import com.jogamp.common.util.locks.LockFactory;
+import com.jogamp.common.util.locks.RecursiveLock;
 
-public class GLPbufferImpl implements GLPbuffer {
-  private GLDrawableImpl pbufferDrawable;
-  private GLContextImpl context;
-  private GLDrawableHelper drawableHelper = new GLDrawableHelper();
-  private int floatMode;
-  private int additionalCtxCreationFlags = 0;
+@SuppressWarnings("deprecation")
+public class GLPbufferImpl extends GLAutoDrawableBase implements GLPbuffer {
 
-  public GLPbufferImpl(GLDrawableImpl pbufferDrawable,
-                       GLContext parentContext) {
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)
-         pbufferDrawable.getNativeSurface().getGraphicsConfiguration().getChosenCapabilities();
-    if(caps.isOnscreen()) {
-        if(caps.isPBuffer()) {
-            throw new IllegalArgumentException("Error: Given drawable is Onscreen and Pbuffer: "+pbufferDrawable);
-        }
-        throw new IllegalArgumentException("Error: Given drawable is Onscreen: "+pbufferDrawable);
-    } else {
-        if(!caps.isPBuffer()) {
-            throw new IllegalArgumentException("Error: Given drawable is not Pbuffer: "+pbufferDrawable);
-        }
-    }
-    this.pbufferDrawable = pbufferDrawable;
-    context = (GLContextImpl) pbufferDrawable.createContext(parentContext);
+  public GLPbufferImpl(GLDrawableImpl pbufferDrawable, GLContextImpl pbufferContext) {
+    super(pbufferDrawable, pbufferContext, true); // drawable := pbufferDrawable, context := pbufferContext
   }
 
-  public GLContext createContext(GLContext shareWith) {
-    return pbufferDrawable.createContext(shareWith);
-  }
+  //
+  // pbuffer specifics
+  //
 
-  public void setRealized(boolean realized) {
-  }
+  //
+  // GLDrawable delegation
+  //
 
-  public boolean isRealized() {
-    return true;
+  @Override
+  public final void swapBuffers() throws GLException {
+      defaultSwapBuffers();
   }
 
-  public void destroy() {
-    if(pbufferDrawable.isRealized()) {
-        final AbstractGraphicsDevice adevice = pbufferDrawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice();
-        
-        if (null != context && context.isCreated()) {
-            try {
-                drawableHelper.disposeGL(GLPbufferImpl.this, pbufferDrawable, context, null);
-            } catch (GLException gle) {
-                gle.printStackTrace();
-            }
-            context = null;
-            // drawableHelper.reset();
-        }
-        pbufferDrawable.destroy();
-        pbufferDrawable = null;
-        
-        if(null != adevice) {
-            adevice.close();
-        }
-    }
-  }
+  //
+  // GLAutoDrawable completion
+  //
+  private final RecursiveLock lock = LockFactory.createRecursiveLock();  // instance wide lock
 
-  public void setSize(int width, int height) {
-    // FIXME
-    throw new GLException("Not yet implemented");
-  }
+  @Override
+  protected final RecursiveLock getLock() { return lock; }
 
-  public NativeSurface getNativeSurface() {
-      return pbufferDrawable.getNativeSurface();
+  @Override
+  public final Object getUpstreamWidget() {
+    return null;
   }
 
-  public long getHandle() {
-    return pbufferDrawable.getHandle();
+  @Override
+  public void destroy() {
+    defaultDestroy();
   }
 
+  @Override
   public GLDrawableFactory getFactory() {
-      return pbufferDrawable.getFactory();
-  }
-
-  public int getWidth() {
-    return pbufferDrawable.getWidth();
-  }
-
-  public int getHeight() {
-    return pbufferDrawable.getHeight();
-  }
-
-  public void display() {
-    invokeGL(displayAction);
-  }
-
-  public void repaint() {
-    display();
-  }
-
-  public void addGLEventListener(GLEventListener listener) {
-    drawableHelper.addGLEventListener(listener);
-  }
-
-  public void addGLEventListener(int index, GLEventListener listener) {
-    drawableHelper.addGLEventListener(index, listener);
-  }
-
-  public void removeGLEventListener(GLEventListener listener) {
-    drawableHelper.removeGLEventListener(listener);
-  }
-
-  public void setAnimator(GLAnimatorControl animatorControl) {
-    drawableHelper.setAnimator(animatorControl);
-  }
-
-  public GLAnimatorControl getAnimator() {
-    return drawableHelper.getAnimator();
-  }
-
-  public void invoke(boolean wait, GLRunnable glRunnable) {
-    drawableHelper.invoke(this, wait, glRunnable);
-  }
-
-  public void setContext(GLContext ctx) {
-    context=(GLContextImpl)ctx;
-    if(null != context) {
-        context.setContextCreationFlags(additionalCtxCreationFlags);
-    }    
+    return drawable.getFactory();
   }
 
-  public GLContext getContext() {
-    return context;
-  }
-
-  public GLDrawable getDrawable() {
-    return pbufferDrawable;
-  }
-
-  public GL getGL() {
-    return getContext().getGL();
-  }
-
-  public GL setGL(GL gl) {
-    return getContext().setGL(gl);
-  }
-
-  public void setAutoSwapBufferMode(boolean onOrOff) {
-    drawableHelper.setAutoSwapBufferMode(onOrOff);
-  }
-
-  public boolean getAutoSwapBufferMode() {
-    return drawableHelper.getAutoSwapBufferMode();
-  }
-
-  public void swapBuffers() {
-    invokeGL(swapBuffersAction);
-  }
-
-  public void setContextCreationFlags(int flags) {
-    additionalCtxCreationFlags = flags;
-    if(null != context) {
-        context.setContextCreationFlags(additionalCtxCreationFlags);
-    }        
-  }
-      
-  public int getContextCreationFlags() {
-    return additionalCtxCreationFlags;                
-  }
-            
-  public void bindTexture() {
-    // Doesn't make much sense to try to do this on the event dispatch
-    // thread given that it has to be called while the context is current
-    context.bindPbufferToTexture();
-  }
-
-  public void releaseTexture() {
-    // Doesn't make much sense to try to do this on the event dispatch
-    // thread given that it has to be called while the context is current
-    context.releasePbufferFromTexture();
-  }
-
-  public GLCapabilitiesImmutable getChosenGLCapabilities() {
-    if (pbufferDrawable == null)
-      return null;
-
-    return pbufferDrawable.getChosenGLCapabilities();
-  }
-
-  public GLCapabilitiesImmutable getRequestedGLCapabilities() {
-    if (pbufferDrawable == null)
-      return null;
-
-    return pbufferDrawable.getRequestedGLCapabilities();
-  }
-
-  public GLProfile getGLProfile() {
-    if (pbufferDrawable == null)
-      return null;
-
-    return pbufferDrawable.getGLProfile();
-  }
-
-  private RecursiveLock recurLock = LockFactory.createRecursiveLock();
-
-  public int lockSurface() throws GLException {
-    recurLock.lock();
-    return NativeSurface.LOCK_SUCCESS;
-  }
-
-  public void unlockSurface() {
-    recurLock.unlock();
-  }
-
-  public boolean isSurfaceLocked() {
-    return recurLock.isLocked();
-  }
-
-  public int getFloatingPointMode() {
-    if (floatMode == 0) {
-      throw new GLException("Pbuffer not initialized, or floating-point support not requested");
-    }
-    return floatMode;
-  }
-
-  //----------------------------------------------------------------------
-  // Internals only below this point
-  //
-
-  private void invokeGL(Runnable invokeGLAction) {
-    drawableHelper.invokeGL(pbufferDrawable, context, invokeGLAction, initAction);
-  }
-
-
-  class InitAction implements Runnable {
-    public void run() {
-      floatMode = context.getFloatingPointMode();
-      drawableHelper.init(GLPbufferImpl.this);
-    }
-  }
-  private InitAction initAction = new InitAction();
-  
-  class DisplayAction implements Runnable {
-    public void run() {
-      drawableHelper.display(GLPbufferImpl.this);
-    }
-  }
-  private DisplayAction displayAction = new DisplayAction();
-
-  class SwapBuffersAction implements Runnable {
-    public void run() {
-      pbufferDrawable.swapBuffers();
+  @Override
+  public final void display() {
+    final RecursiveLock _lock = lock;
+    _lock.lock(); // sync: context/drawable could been recreated/destroyed while animating
+    try {
+        if( null != context ) {
+          helper.invokeGL(drawable, context, defaultDisplayAction, defaultInitAction);
+        }
+    } finally {
+        _lock.unlock();
     }
   }
-  private SwapBuffersAction swapBuffersAction = new SwapBuffersAction();
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLRunnableTask.java b/src/jogl/classes/jogamp/opengl/GLRunnableTask.java
index 448f68423..6de92f533 100644
--- a/src/jogl/classes/jogamp/opengl/GLRunnableTask.java
+++ b/src/jogl/classes/jogamp/opengl/GLRunnableTask.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,12 +20,12 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl;
 
 import javax.media.opengl.GLRunnable;
@@ -39,7 +39,8 @@ public class GLRunnableTask implements GLRunnable {
     GLRunnable runnable;
     Object notifyObject;
     boolean catchExceptions;
-    boolean isExecuted;
+    volatile boolean isExecuted;
+    volatile boolean isFlushed;
 
     Throwable runnableException;
 
@@ -48,8 +49,10 @@ public class GLRunnableTask implements GLRunnable {
         this.notifyObject = notifyObject ;
         this.catchExceptions = catchExceptions;
         isExecuted = false;
+        isFlushed = false;
     }
 
+    @Override
     public boolean run(GLAutoDrawable drawable) {
         boolean res = true;
         if(null == notifyObject) {
@@ -85,7 +88,40 @@ public class GLRunnableTask implements GLRunnable {
         return res;
     }
 
+    /**
+     * Simply flush this task and notify a waiting executor.
+     * The executor which might have been blocked until notified
+     * will be unblocked and the task removed from the queue.
+     *
+     * @see #isFlushed()
+     * @see #isInQueue()
+     */
+    public void flush() {
+        if(!isExecuted() && null != notifyObject) {
+            synchronized (notifyObject) {
+                isFlushed=true;
+                notifyObject.notifyAll();
+            }
+        }
+    }
+
+    /**
+     * @return !{@link #isExecuted()} && !{@link #isFlushed()}
+     */
+    public boolean isInQueue() { return !isExecuted && !isFlushed; }
+
+    /**
+     * @return whether this task has been executed.
+     * @see #isInQueue()
+     */
     public boolean isExecuted() { return isExecuted; }
+
+    /**
+     * @return whether this task has been flushed.
+     * @see #isInQueue()
+     */
+    public boolean isFlushed() { return isFlushed; }
+
     public Throwable getThrowable() { return runnableException; }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/GLStateTracker.java b/src/jogl/classes/jogamp/opengl/GLStateTracker.java
index 391f96aed..0e451741c 100644
--- a/src/jogl/classes/jogamp/opengl/GLStateTracker.java
+++ b/src/jogl/classes/jogamp/opengl/GLStateTracker.java
@@ -1,21 +1,21 @@
 /*
  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -28,11 +28,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -40,7 +40,9 @@
 package jogamp.opengl;
 
 import javax.media.opengl.*;
+
 import com.jogamp.common.util.IntIntHashMap;
+
 import java.nio.IntBuffer;
 import java.util.ArrayList;
 
@@ -51,68 +53,67 @@ import java.util.ArrayList;
  * Currently supported states: PixelStorei
  */
 public class GLStateTracker {
-    
-  /** Minimum value of MAX_CLIENT_ATTRIB_STACK_DEPTH */  
+
+  /** Minimum value of MAX_CLIENT_ATTRIB_STACK_DEPTH */
   public static final int MIN_CLIENT_ATTRIB_STACK_DEPTH = 16;
-  
+
   /** static size of pixel state map */
   static final int PIXEL_STATE_MAP_SIZE = 16;
   /** avoid rehash of static size pixel state map */
   static final int PIXEL_STATE_MAP_CAPACITY = 32;
-  
+
   private volatile boolean enabled = true;
 
   private IntIntHashMap pixelStateMap;
   private final ArrayList<SavedState> stack;
-  
+
   private static class SavedState {
 
     /**
      * Empty pixel-store state
-     */ 
+     */
     private IntIntHashMap pixelStateMap;
-    
+
     /**
      * set (client) pixel-store state, deep copy
-     */ 
+     */
     private final void setPixelStateMap(IntIntHashMap pixelStateMap) {
         this.pixelStateMap = (IntIntHashMap) pixelStateMap.clone();
     }
-    
+
     /**
      * get (client) pixel-store state, return reference
-     */ 
+     */
     private final IntIntHashMap getPixelStateMap() { return pixelStateMap; }
 
   }
-  
 
-  public GLStateTracker() {    
+
+  public GLStateTracker() {
     pixelStateMap = new IntIntHashMap(PIXEL_STATE_MAP_CAPACITY, 0.75f);
     pixelStateMap.setKeyNotFoundValue(0xFFFFFFFF);
     resetStates();
-    
+
     stack = new ArrayList<SavedState>(MIN_CLIENT_ATTRIB_STACK_DEPTH);
   }
 
-  public final void clearStates(boolean enable) {
-    enabled = enable;    
+  public final void clearStates() {
     pixelStateMap.clear();
   }
 
   public final void setEnabled(boolean on) {
-    enabled = on;    
+    enabled = on;
   }
 
   public final boolean isEnabled() {
     return enabled;
   }
 
-  /** @return true if found in our map, otherwise false, 
+  /** @return true if found in our map, otherwise false,
    *  which forces the caller to query GL. */
   public final boolean getInt(int pname, int[] params, int params_offset) {
     if(enabled) {
-        int value = pixelStateMap.get(pname);
+        final int value = pixelStateMap.get(pname);
         if(0xFFFFFFFF != value) {
             params[params_offset] = value;
             return true;
@@ -121,11 +122,11 @@ public class GLStateTracker {
     return false;
   }
 
-  /** @return true if found in our map, otherwise false, 
+  /** @return true if found in our map, otherwise false,
    *  which forces the caller to query GL. */
   public final boolean getInt(int pname, IntBuffer params, int dummy) {
     if(enabled) {
-        int value = pixelStateMap.get(pname);
+        final int value = pixelStateMap.get(pname);
         if(0xFFFFFFFF != value) {
             params.put(params.position(), value);
             return true;
@@ -157,7 +158,7 @@ public class GLStateTracker {
             throw new GLException("stack contains no elements");
         }
         SavedState state = stack.remove(stack.size()-1); // pop
-        
+
         if(null==state) {
             throw new GLException("null stack element (remaining stack size "+stack.size()+")");
         }
@@ -165,7 +166,7 @@ public class GLStateTracker {
         if ( null != state.getPixelStateMap() ) {
             // use pulled client pixel-store state from stack
             pixelStateMap = state.getPixelStateMap();
-        } // else: empty-slot, not pushed by GL_CLIENT_PIXEL_STORE_BIT        
+        } // else: empty-slot, not pushed by GL_CLIENT_PIXEL_STORE_BIT
     }
   }
 
@@ -176,20 +177,20 @@ public class GLStateTracker {
     pixelStateMap.put(GL.GL_PACK_ALIGNMENT,          4);
     pixelStateMap.put(GL2GL3.GL_PACK_SWAP_BYTES,     GL.GL_FALSE);
     pixelStateMap.put(GL2GL3.GL_PACK_LSB_FIRST,      GL.GL_FALSE);
-    pixelStateMap.put(GL2GL3.GL_PACK_ROW_LENGTH,     0);
-    pixelStateMap.put(GL2GL3.GL_PACK_SKIP_ROWS,      0);
-    pixelStateMap.put(GL2GL3.GL_PACK_SKIP_PIXELS,    0);
+    pixelStateMap.put(GL2ES3.GL_PACK_ROW_LENGTH,     0);
+    pixelStateMap.put(GL2ES3.GL_PACK_SKIP_ROWS,      0);
+    pixelStateMap.put(GL2ES3.GL_PACK_SKIP_PIXELS,    0);
     pixelStateMap.put(GL2GL3.GL_PACK_IMAGE_HEIGHT,   0);
     pixelStateMap.put(GL2GL3.GL_PACK_SKIP_IMAGES,    0);
 
     pixelStateMap.put(GL.GL_UNPACK_ALIGNMENT,        4);
     pixelStateMap.put(GL2GL3.GL_UNPACK_SWAP_BYTES,   GL.GL_FALSE);
     pixelStateMap.put(GL2GL3.GL_UNPACK_LSB_FIRST,    GL.GL_FALSE);
-    pixelStateMap.put(GL2GL3.GL_UNPACK_ROW_LENGTH,   0);
-    pixelStateMap.put(GL2GL3.GL_UNPACK_SKIP_ROWS,    0);
-    pixelStateMap.put(GL2GL3.GL_UNPACK_SKIP_PIXELS,  0);
-    pixelStateMap.put(GL2GL3.GL_UNPACK_IMAGE_HEIGHT, 0);
-    pixelStateMap.put(GL2GL3.GL_UNPACK_SKIP_IMAGES,  0);
+    pixelStateMap.put(GL2ES2.GL_UNPACK_ROW_LENGTH,   0);
+    pixelStateMap.put(GL2ES2.GL_UNPACK_SKIP_ROWS,    0);
+    pixelStateMap.put(GL2ES2.GL_UNPACK_SKIP_PIXELS,  0);
+    pixelStateMap.put(GL2ES3.GL_UNPACK_IMAGE_HEIGHT, 0);
+    pixelStateMap.put(GL2ES3.GL_UNPACK_SKIP_IMAGES,  0);
   }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/GLVersionNumber.java b/src/jogl/classes/jogamp/opengl/GLVersionNumber.java
index 5bd008f83..431c1a387 100644
--- a/src/jogl/classes/jogamp/opengl/GLVersionNumber.java
+++ b/src/jogl/classes/jogamp/opengl/GLVersionNumber.java
@@ -28,96 +28,103 @@
 
 package jogamp.opengl;
 
-import java.util.StringTokenizer;
 import com.jogamp.common.util.VersionNumber;
+import com.jogamp.common.util.VersionNumberString;
 
 /**
  * A class for storing and comparing OpenGL version numbers.
  * This only works for desktop OpenGL at the moment.
  */
-class GLVersionNumber extends VersionNumber {
+public class GLVersionNumber extends VersionNumberString {
 
-    protected boolean valid;
+    private final boolean valid;
 
-    public GLVersionNumber(int majorRev, int minorRev, int subMinorRev) {
-        super(majorRev, minorRev, subMinorRev);
-        valid = true;
+    private GLVersionNumber(int[] val, int strEnd, short state, String versionString, boolean valid) {
+        super(val[0], val[1], val[2], strEnd, state, versionString);
+        this.valid = valid;
     }
 
-    public GLVersionNumber(String versionString) {
-        super();
-        valid = false;
-        try {
-            if (versionString.startsWith("GL_VERSION_")) {
-                StringTokenizer tok = new StringTokenizer(versionString, "_");
-                tok.nextToken(); // GL_
-                tok.nextToken(); // VERSION_
-                if (!tok.hasMoreTokens()) {
-                    major = 0;
-                    return;
+    private static java.util.regex.Pattern getUnderscorePattern() {
+        if( null == _Pattern ) { // volatile dbl-checked-locking OK
+            synchronized( VersionNumber.class ) {
+                if( null == _Pattern ) {
+                    _Pattern = getVersionNumberPattern("_");
                 }
-                major = Integer.valueOf(tok.nextToken()).intValue();
-                if (!tok.hasMoreTokens()) {
-                    minor = 0;
-                    return;
-                }
-                minor = Integer.valueOf(tok.nextToken()).intValue();
-                if (!tok.hasMoreTokens()) {
-                    sub = 0;
-                    return;
-                }
-                sub = Integer.valueOf(tok.nextToken()).intValue();
-            } else {
-                int radix = 10;
-                if (versionString.length() > 2) {
-                    if (Character.isDigit(versionString.charAt(0)) && versionString.charAt(1) == '.' && Character.isDigit(versionString.charAt(2))) {
-                        major = Character.digit(versionString.charAt(0), radix);
-                        minor = Character.digit(versionString.charAt(2), radix);
-                        // See if there's version-specific information which might
-                        // imply a more recent OpenGL version
-                        StringTokenizer tok = new StringTokenizer(versionString, " ");
-                        if (tok.hasMoreTokens()) {
-                            tok.nextToken();
-                            if (tok.hasMoreTokens()) {
-                                String token = tok.nextToken();
-                                int i = 0;
-                                while (i < token.length() && !Character.isDigit(token.charAt(i))) {
-                                    i++;
-                                }
-                                if (i < token.length() - 2 && Character.isDigit(token.charAt(i)) && token.charAt(i + 1) == '.' && Character.isDigit(token.charAt(i + 2))) {
-                                    int altMajor = Character.digit(token.charAt(i), radix);
-                                    int altMinor = Character.digit(token.charAt(i + 2), radix);
-                                    // Avoid possibly confusing situations by putting some
-                                    // constraints on the upgrades we do to the major and
-                                    // minor versions
-                                    if ((altMajor == major && altMinor > minor) || altMajor == major + 1) {
-                                        major = altMajor;
-                                        minor = altMinor;
-                                    }
-                                }
-                            }
-                        }
-                    }
+            }
+        }
+        return _Pattern;
+    }
+    private static volatile java.util.regex.Pattern _Pattern = null;
+
+    public static final GLVersionNumber create(String versionString) {
+        int[] val = new int[] { 0, 0, 0 };
+        int strEnd = 0;
+        short state = 0;
+        boolean valid = false;
+        if (versionString != null && versionString.length() > 0) {
+            try {
+                final java.util.regex.Pattern versionPattern;
+                if (versionString.startsWith("GL_VERSION_")) {
+                    versionPattern = getUnderscorePattern();
+                } else {
+                    versionPattern = VersionNumberString.getDefaultVersionNumberPattern();
                 }
+                final VersionNumberString version = new VersionNumberString(versionString, versionPattern);
+                strEnd = version.endOfStringMatch();
+                val[0] = version.getMajor();
+                val[1] = version.getMinor();
+                state = (short) ( ( version.hasMajor() ? VersionNumber.HAS_MAJOR : (short)0 ) |
+                                  ( version.hasMinor() ? VersionNumber.HAS_MINOR : (short)0 ) );
+                valid = version.hasMajor() && version.hasMinor(); // Requires at least a defined major and minor version component!
+            } catch (Exception e) {
+                e.printStackTrace();
+                System.err.println("Info: ExtensionAvailabilityCache: FunctionAvailabilityCache.Version.<init>: " + e);
+                val[0] = 1;
+                val[1] = 0;
             }
-            valid = true;
-        } catch (Exception e) {
-            e.printStackTrace();
-            // FIXME: refactor desktop OpenGL dependencies and make this
-            // class work properly for OpenGL ES
-            System.err.println("Info: ExtensionAvailabilityCache: FunctionAvailabilityCache.Version.<init>: " + e);
-            major = 1;
-            minor = 0;
-            /*
-            throw (IllegalArgumentException)
-            new IllegalArgumentException(
-            "Illegally formatted version identifier: \"" + versionString + "\"")
-            .initCause(e);
-             */
         }
+        return new GLVersionNumber(val, strEnd, state, versionString, valid);
     }
 
     public final boolean isValid() {
         return valid;
     }
+
+    /**
+     * Returns the optional vendor version at the end of the
+     * <code>GL_VERSION</code> string if exists, otherwise the {@link VersionNumberString#zeroVersion zero version} instance.
+     * <pre>
+     *   2.1 Mesa 7.0.3-rc2 -> 7.0.3 (7.0.3-rc2)
+     *   2.1 Mesa 7.12-devel (git-d6c318e) -> 7.12.0 (7.12-devel)
+     *   4.2.12171 Compatibility Profile Context 9.01.8 -> 9.1.8 (9.01.8)
+     *   4.2.12198 Compatibility Profile Context 12.102.3.0 -> 12.102.3 (12.102.3.0)
+     *   4.3.0 NVIDIA 310.32 -> 310.32 (310.32)
+     * </pre>
+     */
+    public static final VersionNumberString createVendorVersion(String versionString) {
+        if (versionString == null || versionString.length() <= 0) {
+            return null;
+        }
+
+        // Skip the 1st GL version
+        String str;
+        {
+            final GLVersionNumber glv = create(versionString);
+            str = versionString.substring(glv.endOfStringMatch()).trim();
+        }
+
+        while ( str.length() > 0 ) {
+            final VersionNumberString version = new VersionNumberString(str, getDefaultVersionNumberPattern());
+            final int eosm = version.endOfStringMatch();
+            if( 0 < eosm ) {
+                if( version.hasMajor() && version.hasMinor() ) { // Requires at least a defined major and minor version component!
+                    return version;
+                }
+                str = str.substring( eosm ).trim();
+            } else {
+                break; // no match
+            }
+        }
+        return VersionNumberString.zeroVersion;
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLWorkerThread.java b/src/jogl/classes/jogamp/opengl/GLWorkerThread.java
index f7d59e127..100b46a5e 100644
--- a/src/jogl/classes/jogamp/opengl/GLWorkerThread.java
+++ b/src/jogl/classes/jogamp/opengl/GLWorkerThread.java
@@ -1,21 +1,21 @@
 /*
  * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -28,11 +28,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -67,7 +67,7 @@ public class GLWorkerThread {
   private static volatile Runnable work;
   // Queue of Runnables to be asynchronously invoked
   private static List<Runnable> queue = new ArrayList<Runnable>();
-  
+
   /** Should only be called by Threading class if creation of the
       GLWorkerThread was requested via the opengl.1thread system
       property. <br>
@@ -149,7 +149,7 @@ public class GLWorkerThread {
     }
   }
 
-  public static void invoke(boolean wait, Runnable runnable) 
+  public static void invoke(boolean wait, Runnable runnable)
       throws InvocationTargetException, InterruptedException {
       if(wait) {
           invokeAndWait(runnable);
@@ -157,7 +157,7 @@ public class GLWorkerThread {
           invokeLater(runnable);
       }
   }
-  
+
   public static void invokeAndWait(Runnable runnable)
     throws InvocationTargetException, InterruptedException {
     if (!started) {
@@ -219,11 +219,10 @@ public class GLWorkerThread {
     return (Thread.currentThread() == thread);
   }
 
-  protected static String getThreadName() {
-    return Thread.currentThread().getName();
-  }
-  
+  protected static String getThreadName() { return Thread.currentThread().getName(); }
+
   static class WorkerRunnable implements Runnable {
+    @Override
     public void run() {
       // Notify starting thread that we're ready
       synchronized (lock) {
@@ -246,7 +245,7 @@ public class GLWorkerThread {
               break;
             }
           }
-          
+
           if (shouldTerminate) {
             lock.notifyAll();
             thread = null;
diff --git a/src/jogl/classes/jogamp/opengl/GLXExtensions.java b/src/jogl/classes/jogamp/opengl/GLXExtensions.java
new file mode 100644
index 000000000..9325c6f68
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLXExtensions.java
@@ -0,0 +1,37 @@
+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl;
+
+/**
+ * Class holding GLX/WGL/.. extension strings, commonly used by JOGL's implementation.
+ */
+public class GLXExtensions {
+  public static final String GLX_MESA_swap_control           = "GLX_MESA_swap_control";
+  public static final String GLX_SGI_swap_control            = "GLX_SGI_swap_control";
+  public static final String GLX_NV_swap_group               = "GLX_NV_swap_group";
+}
diff --git a/src/jogl/classes/jogamp/opengl/ListenerSyncedImplStub.java b/src/jogl/classes/jogamp/opengl/ListenerSyncedImplStub.java
index 1cde551be..a64a2f5cd 100644
--- a/src/jogl/classes/jogamp/opengl/ListenerSyncedImplStub.java
+++ b/src/jogl/classes/jogamp/opengl/ListenerSyncedImplStub.java
@@ -33,9 +33,9 @@ import java.util.ArrayList;
 /**
  * Simple locked listener implementation stub to be used for listener handler,
  * synchronized on it's instance.
- * 
+ *
  * <p>Utilizing simple locking via synchronized.</p>
- * 
+ *
  * @param <E> The listener type
  */
 public class ListenerSyncedImplStub<E> {
@@ -48,7 +48,7 @@ public class ListenerSyncedImplStub<E> {
   public synchronized final void reset() {
     listeners = new ArrayList<E>();
   }
-  
+
   public synchronized final void destroy() {
     listeners.clear();
     listeners = null;
@@ -57,7 +57,7 @@ public class ListenerSyncedImplStub<E> {
   public synchronized final int size() {
     return listeners.size();
   }
-  
+
   public synchronized final void addListener(E listener) {
     addListener(-1, listener);
   }
@@ -68,12 +68,12 @@ public class ListenerSyncedImplStub<E> {
     }
     listeners.add(index, listener);
   }
-  
+
   public synchronized final void removeListener(E listener) {
     listeners.remove(listener);
   }
 
   public final ArrayList<E> getListeners() {
       return listeners;
-  }  
+  }
 }
diff --git a/src/jogl/classes/jogamp/opengl/MemoryObject.java b/src/jogl/classes/jogamp/opengl/MemoryObject.java
index 292700701..6ebefc517 100644
--- a/src/jogl/classes/jogamp/opengl/MemoryObject.java
+++ b/src/jogl/classes/jogamp/opengl/MemoryObject.java
@@ -31,19 +31,22 @@ package jogamp.opengl;
 import java.nio.ByteBuffer;
 import java.util.HashMap;
 
+import javax.media.opengl.GLBufferStorage;
+
+import com.jogamp.common.util.HashUtil;
+
 /**
- *
+ * @deprecated No more used for GL buffer storage tracking, see {@link GLBufferStorage} and {@link GLBufferObjectTracker}.
  */
 public class MemoryObject {
-    private long addr;
-    private long size;
-    private int  hash32;
+    private final long addr;
+    private final long size;
+    private final int  hash;
     private ByteBuffer buffer=null;
-
     public MemoryObject(long addr, long size) {
         this.addr = addr;
         this.size = size;
-        this.hash32 = getHash32(addr, size);
+        this.hash = HashUtil.getAddrSizeHash32_EqualDist(addr, size);
     }
 
     public void setBuffer(ByteBuffer buffer) {
@@ -55,68 +58,46 @@ public class MemoryObject {
     }
 
     /**
-     * @return the 32bit hash value generated via {@link #getHash32(long, long)}
+     * @return the 32bit hash value generated via {@link HashUtil#getAddrSizeHash32_EqualDist(long, long)}.
      */
+    @Override
     public int hashCode() {
-        return hash32;
+        return hash;
+    }
+
+    @Override
+    public String toString() {
+        return "MemoryObject[addr 0x"+Long.toHexString(addr)+", size 0x"+Long.toHexString(size)+", hash32: 0x"+Integer.toHexString(hash)+"]";
     }
 
     /**
      * Ignores the optional attached <code>ByteBuffer</code> intentionally.<br>
-     * 
+     *
      * @return true of reference is equal or <code>obj</code> is of type <code>MemoryObject</code>
      *         and <code>addr</code> and <code>size</code> is equal.<br>
      */
     public boolean equals(Object obj) {
         if(this == obj) { return true; }
         if(obj instanceof MemoryObject) {
-            MemoryObject m = (MemoryObject) obj;
+            final MemoryObject m = (MemoryObject) obj;
             return addr == m.addr && size == m.size ;
         }
         return false;
     }
 
     /**
-     * Generates a 32bit hash value by <code>addr</code> and <code>size</code>.<br>
-     * Ignores the optional attached <code>ByteBuffer</code> intentionally.<br>
-     */
-    public static int getHash32(long addr, long size) {
-        // avoid xor collisions of eg low/high parts
-        // 31 * x == (x << 5) - x
-        int  hash = 31 +              (int)   addr          ; // lo addr
-        hash = ((hash << 5) - hash) + (int) ( addr >>> 32 ) ; // hi addr
-        hash = ((hash << 5) - hash) + (int)   size          ; // lo size
-        hash = ((hash << 5) - hash) + (int) ( size >>> 32 ) ; // hi size
-
-        return hash;
-    }
-
-    /**
-     * Generates a 64bit hash value by <code>addr</code> and <code>size</code>.<br>
-     * Ignores the optional attached <code>ByteBuffer</code> intentionally.<br>
-     */
-    public static long getHash64(long addr, long size) {
-        // 31 * x == (x << 5) - x
-        final long hash = 31 + addr;
-        return ((hash << 5) - hash) + size;
-    }
-
-    public String toString() {
-        return "MemoryObject[addr 0x"+Long.toHexString(addr)+", size 0x"+Long.toHexString(size)+", hash32: 0x"+Integer.toHexString(hash32)+"]";
-    }
-
-    /**
      * @param map the identity HashMap, MemoryObject to MemoryObject
      * @param obj0 the MemoryObject
      * @return either the already mapped MemoryObject - not changing the map, or the newly mapped one.
      */
     public static MemoryObject getOrAddSafe(HashMap<MemoryObject,MemoryObject> map, MemoryObject obj0) {
-        MemoryObject obj1 = map.get(obj0); // get identity (fast)
+        final MemoryObject obj1 = map.get(obj0); // get identity (fast)
         if(null == obj1) {
             map.put(obj0, obj0);
-            obj1 = obj0;
+            return obj0;
+        } else {
+            return obj1;
         }
-        return obj1;
     }
 
 }
\ No newline at end of file
diff --git a/src/jogl/classes/jogamp/opengl/ProjectFloat.java b/src/jogl/classes/jogamp/opengl/ProjectFloat.java
index ce8405f74..d4fd1c935 100644
--- a/src/jogl/classes/jogamp/opengl/ProjectFloat.java
+++ b/src/jogl/classes/jogamp/opengl/ProjectFloat.java
@@ -6,9 +6,9 @@
 ** this file except in compliance with the License. You may obtain a copy
 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
+**
 ** http://oss.sgi.com/projects/FreeB
-** 
+**
 ** Note that, as provided in the License, the Software is distributed on an
 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
@@ -24,13 +24,13 @@
 ** except that Section 2.2 and 11 are omitted.  Any differences between
 ** the Alternative License and the SGI License are offered solely by Sun
 ** and not by SGI.
-** 
+**
 ** Original Code. The Original Code is: OpenGL Sample Implementation,
 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 ** Copyright in any portions created by third parties is as indicated
 ** elsewhere herein. All Rights Reserved.
-** 
+**
 ** Additional Notice Provisions: The application programming interfaces
 ** established by SGI in conjunction with the Original Code are The
 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -45,34 +45,34 @@
 ** $Header$
 */
 
-/* 
+/*
  * Copyright (c) 2002-2004 LWJGL Project
  * All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are 
+ * modification, are permitted provided that the following conditions are
  * met:
- * 
- * * Redistributions of source code must retain the above copyright 
+ *
+ * * Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  *
  * * Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  *
- * * Neither the name of 'LWJGL' nor the names of 
- *   its contributors may be used to endorse or promote products derived 
+ * * Neither the name of 'LWJGL' nor the names of
+ *   its contributors may be used to endorse or promote products derived
  *   from this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
@@ -80,22 +80,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2011 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -108,7 +108,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
@@ -122,21 +122,21 @@ import java.nio.IntBuffer;
 import javax.media.opengl.fixedfunc.GLMatrixFunc;
 
 import com.jogamp.common.nio.Buffers;
-import com.jogamp.opengl.FloatUtil;
+import com.jogamp.opengl.math.FloatUtil;
 
 /**
  * ProjectFloat.java
  * <p>
  * Created 11-jan-2004
  * </p>
- * 
+ *
  * @author Erik Duijs
  * @author Kenneth Russell
  * @author Sven Gothel
  */
 public class ProjectFloat {
-  public static final int getRequiredFloatBufferSize() { return 2*16+2*4+3*3; }
-  
+  public static final int getRequiredFloatBufferSize() { return 1*16; }
+
   // Note that we have cloned parts of the implementation in order to
   // support incoming Buffers. The reason for this is to avoid loading
   // non-direct buffer subclasses unnecessarily, because doing so can
@@ -153,62 +153,36 @@ public class ProjectFloat {
   private final float[] out = new float[4];
 
   // Buffer-based implementation
-  private FloatBuffer matrixBuf;
-  private FloatBuffer tempInvertMatrixBuf;
-
-  private FloatBuffer inBuf;
-  private FloatBuffer outBuf;
+  private FloatBuffer matrixBuf; // 4x4
 
-  private FloatBuffer forwardBuf;
-  private FloatBuffer sideBuf;
-  private FloatBuffer upBuf;
+  private final float[] forward = new float[3];  // 3
+  private final float[] side    = new float[3];  // 3
+  private final float[] up      = new float[3];  // 3
 
   public ProjectFloat() {
-      this(false);
+      this(true);
   }
-  
+
   public ProjectFloat(boolean useBackingArray) {
-      this(useBackingArray ? null : Buffers.newDirectByteBuffer(getRequiredFloatBufferSize() * Buffers.SIZEOF_FLOAT), 
-           useBackingArray ? new float[getRequiredFloatBufferSize()] : null, 
+      this(useBackingArray ? null : Buffers.newDirectByteBuffer(getRequiredFloatBufferSize() * Buffers.SIZEOF_FLOAT),
+           useBackingArray ? new float[getRequiredFloatBufferSize()] : null,
            0);
   }
 
   /**
    * @param floatBuffer source buffer, may be ByteBuffer (recommended) or FloatBuffer or <code>null</code>.
-   *                    If used, shall be &ge; {@link #getRequiredFloatBufferSize()} + floatOffset. 
+   *                    If used, shall be &ge; {@link #getRequiredFloatBufferSize()} + floatOffset.
    *                    Buffer's position is ignored and floatPos is being used.
    * @param floatArray source float array or <code>null</code>.
    *                   If used, size shall be &ge; {@link #getRequiredFloatBufferSize()} + floatOffset.
    * @param floatOffset Offset for either of the given sources (buffer or array)
    */
-  public ProjectFloat(Buffer floatBuffer, float[] floatArray, int floatOffset) {    
-    int floatPos = floatOffset;
-    int floatSize = 16;
-    matrixBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
-    floatPos += floatSize;
-    tempInvertMatrixBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
-    floatPos += floatSize;
-    floatSize = 4;
-    inBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
-    floatPos += floatSize;
-    outBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
-    floatPos += floatSize;
-    floatSize = 3;
-    forwardBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
-    floatPos += floatSize;
-    sideBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
-    floatPos += floatSize;
-    upBuf = Buffers.slice2Float(floatBuffer, floatArray, floatPos, floatSize);
+  public ProjectFloat(Buffer floatBuffer, float[] floatArray, int floatOffset) {
+    matrixBuf = Buffers.slice2Float(floatBuffer, floatArray, floatOffset, 16);
   }
 
   public void destroy() {
     matrixBuf = null;
-    tempInvertMatrixBuf = null;
-    inBuf = null;
-    outBuf = null;
-    forwardBuf = null;
-    sideBuf = null;
-    upBuf = null;
   }
 
   /**
@@ -221,7 +195,7 @@ public class ProjectFloat {
   public boolean gluInvertMatrixf(float[] src, int srcOffset, float[] inverse, int inverseOffset) {
     int i, j, k, swap;
     float t;
-    float[][] temp = tempInvertMatrix;
+    final float[][] temp = tempInvertMatrix;
 
     for (i = 0; i < 4; i++) {
       for (j = 0; j < 4; j++) {
@@ -285,21 +259,21 @@ public class ProjectFloat {
   /**
    * @param src
    * @param inverse
-   * 
+   *
    * @return
    */
   public boolean gluInvertMatrixf(FloatBuffer src, FloatBuffer inverse) {
     int i, j, k, swap;
     float t;
 
-    int srcPos = src.position();
-    int invPos = inverse.position();
+    final int srcPos = src.position();
+    final int invPos = inverse.position();
 
-    FloatBuffer temp = tempInvertMatrixBuf;
+    final float[][] temp = tempInvertMatrix;
 
     for (i = 0; i < 4; i++) {
       for (j = 0; j < 4; j++) {
-        temp.put(i*4+j, src.get(i*4+j + srcPos));
+        temp[i][j] = src.get(i*4+j + srcPos);
       }
     }
     FloatUtil.makeIdentityf(inverse);
@@ -310,7 +284,7 @@ public class ProjectFloat {
       //
       swap = i;
       for (j = i + 1; j < 4; j++) {
-        if (Math.abs(temp.get(j*4+i)) > Math.abs(temp.get(i*4+i))) {
+        if (Math.abs(temp[j][i]) > Math.abs(temp[i][i])) {
           swap = j;
         }
       }
@@ -320,9 +294,9 @@ public class ProjectFloat {
         // Swap rows.
         //
         for (k = 0; k < 4; k++) {
-          t = temp.get(i*4+k);
-          temp.put(i*4+k, temp.get(swap*4+k));
-          temp.put(swap*4+k, t);
+          t = temp[i][k];
+          temp[i][k] = temp[swap][k];
+          temp[swap][k] = t;
 
           t = inverse.get(i*4+k + invPos);
           inverse.put(i*4+k + invPos, inverse.get(swap*4+k + invPos));
@@ -330,7 +304,7 @@ public class ProjectFloat {
         }
       }
 
-      if (temp.get(i*4+i) == 0) {
+      if (temp[i][i] == 0) {
         //
         // No non-zero pivot. The matrix is singular, which shouldn't
         // happen. This means the user gave us a bad matrix.
@@ -338,17 +312,19 @@ public class ProjectFloat {
         return false;
       }
 
-      t = temp.get(i*4+i);
+      t = temp[i][i];
       for (k = 0; k < 4; k++) {
-        temp.put(i*4+k, temp.get(i*4+k) / t);
-        inverse.put(i*4+k + invPos, inverse.get(i*4+k + invPos) / t);
+        temp[i][k] /= t;
+        final int z = i*4+k + invPos;
+        inverse.put(z, inverse.get(z) / t);
       }
       for (j = 0; j < 4; j++) {
         if (j != i) {
-          t = temp.get(j*4+i);
+          t = temp[j][i];
           for (k = 0; k < 4; k++) {
-            temp.put(j*4+k, temp.get(j*4+k) - temp.get(i*4+k) * t);
-            inverse.put(j*4+k + invPos, inverse.get(j*4+k + invPos) - inverse.get(i*4+k + invPos) * t);
+            temp[j][k] -= temp[i][k] * t;
+            final int z = j*4+k + invPos;
+            inverse.put(z, inverse.get(z) - inverse.get(i*4+k + invPos) * t);
           }
         }
       }
@@ -359,7 +335,7 @@ public class ProjectFloat {
 
   /**
    * Method gluOrtho2D.
-   * 
+   *
    * @param left
    * @param right
    * @param bottom
@@ -371,15 +347,15 @@ public class ProjectFloat {
 
   /**
    * Method gluPerspective.
-   * 
+   *
    * @param fovy
    * @param aspect
    * @param zNear
    * @param zFar
    */
   public void gluPerspective(GLMatrixFunc gl, float fovy, float aspect, float zNear, float zFar) {
+    final float radians = fovy / 2 * (float) Math.PI / 180;
     float sine, cotangent, deltaZ;
-    float radians = fovy / 2 * (float) Math.PI / 180;
 
     deltaZ = zFar - zNear;
     sine = (float) Math.sin(radians);
@@ -391,20 +367,20 @@ public class ProjectFloat {
     cotangent = (float) Math.cos(radians) / sine;
 
     FloatUtil.makeIdentityf(matrixBuf);
-
-    matrixBuf.put(0 * 4 + 0, cotangent / aspect);
-    matrixBuf.put(1 * 4 + 1, cotangent);
-    matrixBuf.put(2 * 4 + 2, - (zFar + zNear) / deltaZ);
-    matrixBuf.put(2 * 4 + 3, -1);
-    matrixBuf.put(3 * 4 + 2, -2 * zNear * zFar / deltaZ);
-    matrixBuf.put(3 * 4 + 3, 0);
+    final int mPos = matrixBuf.position();
+    matrixBuf.put(0 * 4 + 0 + mPos, cotangent / aspect);
+    matrixBuf.put(1 * 4 + 1 + mPos, cotangent);
+    matrixBuf.put(2 * 4 + 2 + mPos, - (zFar + zNear) / deltaZ);
+    matrixBuf.put(2 * 4 + 3 + mPos, -1);
+    matrixBuf.put(3 * 4 + 2 + mPos, -2 * zNear * zFar / deltaZ);
+    matrixBuf.put(3 * 4 + 3 + mPos, 0);
 
     gl.glMultMatrixf(matrixBuf);
   }
 
   /**
    * Method gluLookAt
-   * 
+   *
    * @param eyex
    * @param eyey
    * @param eyez
@@ -419,17 +395,17 @@ public class ProjectFloat {
                         float eyex, float eyey, float eyez,
                         float centerx, float centery, float centerz,
                         float upx, float upy, float upz) {
-    FloatBuffer forward = this.forwardBuf;
-    FloatBuffer side = this.sideBuf;
-    FloatBuffer up = this.upBuf;
+    final float[] forward = this.forward;
+    final float[] side = this.side;
+    final float[] up = this.up;
 
-    forward.put(0, centerx - eyex);
-    forward.put(1, centery - eyey);
-    forward.put(2, centerz - eyez);
+    forward[0] = centerx - eyex;
+    forward[1] = centery - eyey;
+    forward[2] = centerz - eyez;
 
-    up.put(0, upx);
-    up.put(1, upy);
-    up.put(2, upz);
+    up[0] = upx;
+    up[1] = upy;
+    up[2] = upz;
 
     FloatUtil.normalize(forward);
 
@@ -441,25 +417,26 @@ public class ProjectFloat {
     FloatUtil.cross(side, forward, up);
 
     FloatUtil.makeIdentityf(matrixBuf);
-    matrixBuf.put(0 * 4 + 0, side.get(0));
-    matrixBuf.put(1 * 4 + 0, side.get(1));
-    matrixBuf.put(2 * 4 + 0, side.get(2));
+    final int mPos = matrixBuf.position();
+    matrixBuf.put(0 * 4 + 0 + mPos, side[0]);
+    matrixBuf.put(1 * 4 + 0 + mPos, side[1]);
+    matrixBuf.put(2 * 4 + 0 + mPos, side[2]);
 
-    matrixBuf.put(0 * 4 + 1, up.get(0));
-    matrixBuf.put(1 * 4 + 1, up.get(1));
-    matrixBuf.put(2 * 4 + 1, up.get(2));
+    matrixBuf.put(0 * 4 + 1 + mPos, up[0]);
+    matrixBuf.put(1 * 4 + 1 + mPos, up[1]);
+    matrixBuf.put(2 * 4 + 1 + mPos, up[2]);
 
-    matrixBuf.put(0 * 4 + 2, -forward.get(0));
-    matrixBuf.put(1 * 4 + 2, -forward.get(1));
-    matrixBuf.put(2 * 4 + 2, -forward.get(2));
+    matrixBuf.put(0 * 4 + 2 + mPos, -forward[0]);
+    matrixBuf.put(1 * 4 + 2 + mPos, -forward[1]);
+    matrixBuf.put(2 * 4 + 2 + mPos, -forward[2]);
 
     gl.glMultMatrixf(matrixBuf);
     gl.glTranslatef(-eyex, -eyey, -eyez);
   }
 
   /**
-   * Method gluProject
-   * 
+   * Map object coordinates to window coordinates.
+   *
    * @param objx
    * @param objy
    * @param objz
@@ -467,7 +444,7 @@ public class ProjectFloat {
    * @param projMatrix
    * @param viewport
    * @param win_pos
-   * 
+   *
    * @return
    */
   public boolean gluProject(float objx, float objy, float objz,
@@ -476,16 +453,16 @@ public class ProjectFloat {
                             int[] viewport, int viewport_offset,
                             float[] win_pos, int win_pos_offset ) {
 
-    float[] in = this.in;
-    float[] out = this.out;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
     in[0] = objx;
     in[1] = objy;
     in[2] = objz;
     in[3] = 1.0f;
 
-    FloatUtil.multMatrixVecf(modelMatrix, modelMatrix_offset, in, 0, out);
-    FloatUtil.multMatrixVecf(projMatrix, projMatrix_offset, out, 0, in);
+    FloatUtil.multMatrixVecf(modelMatrix, modelMatrix_offset, in, 0, out, 0);
+    FloatUtil.multMatrixVecf(projMatrix, projMatrix_offset, out, 0, in, 0);
 
     if (in[3] == 0.0f) {
       return false;
@@ -506,45 +483,48 @@ public class ProjectFloat {
     return true;
   }
 
+  /**
+   * Map object coordinates to window coordinates.
+   */
   public boolean gluProject(float objx, float objy, float objz,
                             FloatBuffer modelMatrix,
                             FloatBuffer projMatrix,
                             int[] viewport, int viewport_offset,
                             float[] win_pos, int win_pos_offset ) {
 
-    FloatBuffer in = this.inBuf;
-    FloatBuffer out = this.outBuf;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
-    in.put(0, objx);
-    in.put(1, objy);
-    in.put(2, objz);
-    in.put(3, 1.0f);
+    in[0] = objx;
+    in[1] = objy;
+    in[2] = objz;
+    in[3] = 1.0f;
 
     FloatUtil.multMatrixVecf(modelMatrix, in, out);
     FloatUtil.multMatrixVecf(projMatrix, out, in);
 
-    if (in.get(3) == 0.0f) {
+    if (in[3] == 0.0f) {
       return false;
     }
 
-    in.put(3, (1.0f / in.get(3)) * 0.5f);
+    in[3] = (1.0f / in[3]) * 0.5f;
 
     // Map x, y and z to range 0-1
-    in.put(0, in.get(0) * in.get(3) + 0.5f);
-    in.put(1, in.get(1) * in.get(3) + 0.5f);
-    in.put(2, in.get(2) * in.get(3) + 0.5f);
+    in[0] = in[0] * in[3] + 0.5f;
+    in[1] = in[1] * in[3] + 0.5f;
+    in[2] = in[2] * in[3] + 0.5f;
 
     // Map x,y to viewport
-    win_pos[0+win_pos_offset] = in.get(0) * viewport[2+viewport_offset] + viewport[0+viewport_offset];
-    win_pos[1+win_pos_offset] = in.get(1) * viewport[3+viewport_offset] + viewport[1+viewport_offset];
-    win_pos[2+win_pos_offset] = in.get(2);
+    win_pos[0+win_pos_offset] = in[0] * viewport[2+viewport_offset] + viewport[0+viewport_offset];
+    win_pos[1+win_pos_offset] = in[1] * viewport[3+viewport_offset] + viewport[1+viewport_offset];
+    win_pos[2+win_pos_offset] = in[2];
 
     return true;
   }
-  
+
   /**
-   * Method gluProject
-   * 
+   * Map object coordinates to window coordinates.
+   *
    * @param objx
    * @param objy
    * @param objz
@@ -552,7 +532,7 @@ public class ProjectFloat {
    * @param projMatrix
    * @param viewport
    * @param win_pos
-   * 
+   *
    * @return
    */
   public boolean gluProject(float objx, float objy, float objz,
@@ -561,42 +541,42 @@ public class ProjectFloat {
                             IntBuffer viewport,
                             FloatBuffer win_pos) {
 
-    FloatBuffer in = this.inBuf;
-    FloatBuffer out = this.outBuf;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
-    in.put(0, objx);
-    in.put(1, objy);
-    in.put(2, objz);
-    in.put(3, 1.0f);
+    in[0] = objx;
+    in[1] = objy;
+    in[2] = objz;
+    in[3] = 1.0f;
 
     FloatUtil.multMatrixVecf(modelMatrix, in, out);
     FloatUtil.multMatrixVecf(projMatrix, out, in);
 
-    if (in.get(3) == 0.0f) {
+    if (in[3] == 0.0f) {
       return false;
     }
 
-    in.put(3, (1.0f / in.get(3)) * 0.5f);
+    in[3] = (1.0f / in[3]) * 0.5f;
 
     // Map x, y and z to range 0-1
-    in.put(0, in.get(0) * in.get(3) + 0.5f);
-    in.put(1, in.get(1) * in.get(3) + 0.5f);
-    in.put(2, in.get(2) * in.get(3) + 0.5f);
+    in[0] = in[0] * in[3] + 0.5f;
+    in[1] = in[1] * in[3] + 0.5f;
+    in[2] = in[2] * in[3] + 0.5f;
 
     // Map x,y to viewport
-    int vPos = viewport.position();
-    int wPos = win_pos.position();
-    win_pos.put(0+wPos, in.get(0) * viewport.get(2+vPos) + viewport.get(0+vPos));
-    win_pos.put(1+wPos, in.get(1) * viewport.get(3+vPos) + viewport.get(1+vPos));
-    win_pos.put(2+wPos, in.get(2));
+    final int vPos = viewport.position();
+    final int wPos = win_pos.position();
+    win_pos.put(0+wPos, in[0] * viewport.get(2+vPos) + viewport.get(0+vPos));
+    win_pos.put(1+wPos, in[1] * viewport.get(3+vPos) + viewport.get(1+vPos));
+    win_pos.put(2+wPos, in[2]);
 
     return true;
   }
 
 
   /**
-   * Method gluUnproject
-   * 
+   * Map window coordinates to object coordinates.
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -604,7 +584,7 @@ public class ProjectFloat {
    * @param projMatrix
    * @param viewport
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject(float winx, float winy, float winz,
@@ -612,8 +592,8 @@ public class ProjectFloat {
                               float[] projMatrix, int projMatrix_offset,
                               int[] viewport, int viewport_offset,
                               float[] obj_pos, int obj_pos_offset) {
-    float[] in = this.in;
-    float[] out = this.out;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
     FloatUtil.multMatrixf(projMatrix, projMatrix_offset, modelMatrix, modelMatrix_offset, matrix, 0);
 
@@ -651,13 +631,27 @@ public class ProjectFloat {
   }
 
 
+  /**
+   * Map window coordinates to object coordinates.
+   *
+   * @param winx
+   * @param winy
+   * @param winz
+   * @param modelMatrix
+   * @param projMatrix
+   * @param viewport
+   * @param viewport_offset
+   * @param obj_pos
+   * @param obj_pos_offset
+   * @return
+   */
   public boolean gluUnProject(float winx, float winy, float winz,
-                              FloatBuffer modelMatrix, 
+                              FloatBuffer modelMatrix,
                               FloatBuffer projMatrix,
                               int[] viewport, int viewport_offset,
                               float[] obj_pos, int obj_pos_offset) {
-    FloatBuffer in = this.inBuf;
-    FloatBuffer out = this.outBuf;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
     FloatUtil.multMatrixf(projMatrix, modelMatrix, matrixBuf);
 
@@ -665,38 +659,38 @@ public class ProjectFloat {
       return false;
     }
 
-    in.put(0, winx);
-    in.put(1, winy);
-    in.put(2, winz);
-    in.put(3, 1.0f);
+    in[0] = winx;
+    in[1] = winy;
+    in[2] = winz;
+    in[3] = 1.0f;
 
     // Map x and y from window coordinates
-    in.put(0, (in.get(0) - viewport[0+viewport_offset]) / viewport[2+viewport_offset]);
-    in.put(1, (in.get(1) - viewport[1+viewport_offset]) / viewport[3+viewport_offset]);
-    
+    in[0] = (in[0] - viewport[0+viewport_offset]) / viewport[2+viewport_offset];
+    in[1] = (in[1] - viewport[1+viewport_offset]) / viewport[3+viewport_offset];
+
     // Map to range -1 to 1
-    in.put(0, in.get(0) * 2 - 1);
-    in.put(1, in.get(1) * 2 - 1);
-    in.put(2, in.get(2) * 2 - 1);
+    in[0] = in[0] * 2 - 1;
+    in[1] = in[1] * 2 - 1;
+    in[2] = in[2] * 2 - 1;
 
     FloatUtil.multMatrixVecf(matrixBuf, in, out);
 
-    if (out.get(3) == 0.0f) {
+    if (out[3] == 0.0) {
       return false;
     }
 
-    out.put(3, 1.0f / out.get(3));
+    out[3] = 1.0f / out[3];
 
-    obj_pos[0+obj_pos_offset] = out.get(0) * out.get(3);
-    obj_pos[1+obj_pos_offset] = out.get(1) * out.get(3);
-    obj_pos[2+obj_pos_offset] = out.get(2) * out.get(3);
+    obj_pos[0+obj_pos_offset] = out[0] * out[3];
+    obj_pos[1+obj_pos_offset] = out[1] * out[3];
+    obj_pos[2+obj_pos_offset] = out[2] * out[3];
 
     return true;
   }
-  
+
   /**
-   * Method gluUnproject
-   * 
+   * Map window coordinates to object coordinates.
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -704,16 +698,16 @@ public class ProjectFloat {
    * @param projMatrix
    * @param viewport
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject(float winx, float winy, float winz,
-                              FloatBuffer modelMatrix, 
+                              FloatBuffer modelMatrix,
                               FloatBuffer projMatrix,
                               IntBuffer viewport,
                               FloatBuffer obj_pos) {
-    FloatBuffer in = this.inBuf;
-    FloatBuffer out = this.outBuf;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
     FloatUtil.multMatrixf(projMatrix, modelMatrix, matrixBuf);
 
@@ -721,41 +715,41 @@ public class ProjectFloat {
       return false;
     }
 
-    in.put(0, winx);
-    in.put(1, winy);
-    in.put(2, winz);
-    in.put(3, 1.0f);
+    in[0] = winx;
+    in[1] = winy;
+    in[2] = winz;
+    in[3] = 1.0f;
 
     // Map x and y from window coordinates
-    int vPos = viewport.position();
-    int oPos = obj_pos.position();
-    in.put(0, (in.get(0) - viewport.get(0+vPos)) / viewport.get(2+vPos));
-    in.put(1, (in.get(1) - viewport.get(1+vPos)) / viewport.get(3+vPos));
+    final int vPos = viewport.position();
+    final int oPos = obj_pos.position();
+    in[0] = (in[0] - viewport.get(0+vPos)) / viewport.get(2+vPos);
+    in[1] = (in[1] - viewport.get(1+vPos)) / viewport.get(3+vPos);
 
     // Map to range -1 to 1
-    in.put(0, in.get(0) * 2 - 1);
-    in.put(1, in.get(1) * 2 - 1);
-    in.put(2, in.get(2) * 2 - 1);
+    in[0] = in[0] * 2 - 1;
+    in[1] = in[1] * 2 - 1;
+    in[2] = in[2] * 2 - 1;
 
     FloatUtil.multMatrixVecf(matrixBuf, in, out);
 
-    if (out.get(3) == 0.0f) {
+    if (out[3] == 0.0) {
       return false;
     }
 
-    out.put(3, 1.0f / out.get(3));
+    out[3] = 1.0f / out[3];
 
-    obj_pos.put(0+oPos, out.get(0) * out.get(3));
-    obj_pos.put(1+oPos, out.get(1) * out.get(3));
-    obj_pos.put(2+oPos, out.get(2) * out.get(3));
+    obj_pos.put(0+oPos, out[0] * out[3]);
+    obj_pos.put(1+oPos, out[1] * out[3]);
+    obj_pos.put(2+oPos, out[2] * out[3]);
 
     return true;
   }
 
 
   /**
-   * Method gluUnproject4
-   * 
+   * Map window coordinates to object coordinates.
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -766,7 +760,7 @@ public class ProjectFloat {
    * @param near
    * @param far
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject4(float winx,
@@ -783,8 +777,8 @@ public class ProjectFloat {
                                float far,
                                float[] obj_pos,
                                int obj_pos_offset ) {
-    float[] in = this.in;
-    float[] out = this.out;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
     FloatUtil.multMatrixf(projMatrix, projMatrix_offset, modelMatrix, modelMatrix_offset, matrix, 0);
 
@@ -808,8 +802,9 @@ public class ProjectFloat {
 
     FloatUtil.multMatrixVecf(matrix, in, out);
 
-    if (out[3] == 0.0f)
+    if (out[3] == 0.0f) {
       return false;
+    }
 
     obj_pos[0+obj_pos_offset] = out[0];
     obj_pos[1+obj_pos_offset] = out[1];
@@ -819,8 +814,8 @@ public class ProjectFloat {
   }
 
   /**
-   * Method gluUnproject4
-   * 
+   * Map window coordinates to object coordinates.
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -831,7 +826,7 @@ public class ProjectFloat {
    * @param near
    * @param far
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject4(float winx,
@@ -844,47 +839,48 @@ public class ProjectFloat {
                                float near,
                                float far,
                                FloatBuffer obj_pos) {
-    FloatBuffer in = this.inBuf;
-    FloatBuffer out = this.outBuf;
+    final float[] in = this.in;
+    final float[] out = this.out;
 
     FloatUtil.multMatrixf(projMatrix, modelMatrix, matrixBuf);
 
     if (!gluInvertMatrixf(matrixBuf, matrixBuf))
       return false;
 
-    in.put(0, winx);
-    in.put(1, winy);
-    in.put(2, winz);
-    in.put(3, clipw);
+    in[0] = winx;
+    in[1] = winy;
+    in[2] = winz;
+    in[3] = clipw;
 
     // Map x and y from window coordinates
-    int vPos = viewport.position();
-    in.put(0, (in.get(0) - viewport.get(0+vPos)) / viewport.get(2+vPos));
-    in.put(1, (in.get(1) - viewport.get(1+vPos)) / viewport.get(3+vPos));
-    in.put(2, (in.get(2) - near) / (far - near));
+    final int vPos = viewport.position();
+    in[0] = (in[0] - viewport.get(0+vPos)) / viewport.get(2+vPos);
+    in[1] = (in[1] - viewport.get(1+vPos)) / viewport.get(3+vPos);
+    in[2] = (in[2] - near) / (far - near);
 
     // Map to range -1 to 1
-    in.put(0, in.get(0) * 2 - 1);
-    in.put(1, in.get(1) * 2 - 1);
-    in.put(2, in.get(2) * 2 - 1);
+    in[0] = in[0] * 2 - 1;
+    in[1] = in[1] * 2 - 1;
+    in[2] = in[2] * 2 - 1;
 
     FloatUtil.multMatrixVecf(matrixBuf, in, out);
 
-    if (out.get(3) == 0.0f)
+    if (out[3] == 0.0f) {
       return false;
+    }
 
-    int oPos = obj_pos.position();
-    obj_pos.put(0+oPos, out.get(0));
-    obj_pos.put(1+oPos, out.get(1));
-    obj_pos.put(2+oPos, out.get(2));
-    obj_pos.put(3+oPos, out.get(3));
+    final int oPos = obj_pos.position();
+    obj_pos.put(0+oPos, out[0]);
+    obj_pos.put(1+oPos, out[1]);
+    obj_pos.put(2+oPos, out[2]);
+    obj_pos.put(3+oPos, out[3]);
     return true;
   }
 
 
   /**
    * Method gluPickMatrix
-   * 
+   *
    * @param x
    * @param y
    * @param deltaX
@@ -902,7 +898,7 @@ public class ProjectFloat {
     }
 
     /* Translate and scale the picked region to the entire window */
-    int vPos = viewport.position();
+    final int vPos = viewport.position();
     gl.glTranslatef((viewport.get(2+vPos) - 2 * (x - viewport.get(0+vPos))) / deltaX,
                     (viewport.get(3+vPos) - 2 * (y - viewport.get(1+vPos))) / deltaY,
                     0);
@@ -911,7 +907,7 @@ public class ProjectFloat {
 
   /**
    * Method gluPickMatrix
-   * 
+   *
    * @param x
    * @param y
    * @param deltaX
diff --git a/src/jogl/classes/jogamp/opengl/SharedResourceRunner.java b/src/jogl/classes/jogamp/opengl/SharedResourceRunner.java
index 0528d3060..283ecdb9d 100644
--- a/src/jogl/classes/jogamp/opengl/SharedResourceRunner.java
+++ b/src/jogl/classes/jogamp/opengl/SharedResourceRunner.java
@@ -33,27 +33,49 @@ import java.util.Iterator;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 
+import com.jogamp.opengl.GLRendererQuirks;
+
 public class SharedResourceRunner implements Runnable {
     protected static final boolean DEBUG = GLDrawableImpl.DEBUG;
 
     public static interface Resource {
+      boolean isValid();
       AbstractGraphicsDevice getDevice();
       AbstractGraphicsScreen getScreen();
       GLDrawableImpl getDrawable();
       GLContextImpl getContext();
+      GLRendererQuirks getRendererQuirks();
     }
 
     public static interface Implementation {
         /**
-         * @param connection for creation a {@link AbstractGraphicsDevice} instance. 
-         * @return A new shared resource instance 
+         * <p>
+         * Called within synchronized block.
+         * </p>
+         * @param connection for creation a {@link AbstractGraphicsDevice} instance.
+         * @return <code>true</code> if the device supports all protocols required for the implementation, otherwise <code>false</code>.
+         */
+        boolean isDeviceSupported(String connection);
+
+        /**
+         * <p>
+         * Called within synchronized block.
+         * </p>
+         * @param connection for creation a {@link AbstractGraphicsDevice} instance.
+         * @return A new shared resource instance
          */
         Resource createSharedResource(String connection);
+
+        /** Called within synchronized block. */
         void releaseSharedResource(Resource shared);
+        /** Called within synchronized block. */
         void clear();
 
+        /** Called within synchronized block. */
         Resource mapPut(String connection, Resource resource);
+        /** Called within synchronized block. */
         Resource mapGet(String connection);
+        /** Called within synchronized block. */
         Collection<Resource> mapValues();
     }
 
@@ -61,106 +83,115 @@ public class SharedResourceRunner implements Runnable {
     final Implementation impl;
 
     Thread thread;
+    boolean running;
     boolean ready;
-    boolean released;
     boolean shouldRelease;
     String initConnection;
     String releaseConnection;
 
-    private boolean getDeviceTried(String connection) {
-        synchronized (devicesTried) {
-            return devicesTried.contains(connection);
-        }
+    private boolean getDeviceTried(String connection) { // synchronized call
+        return devicesTried.contains(connection);
     }
-    private void addDeviceTried(String connection) {
-        synchronized (devicesTried) {
-            devicesTried.add(connection);
-        }
+    private void addDeviceTried(String connection) { // synchronized call
+        devicesTried.add(connection);
     }
-    private void removeDeviceTried(String connection) {
-        synchronized (devicesTried) {
-            devicesTried.remove(connection);
-        }
+    private void removeDeviceTried(String connection) { // synchronized call
+        devicesTried.remove(connection);
     }
 
     public SharedResourceRunner(Implementation impl) {
         this.impl = impl;
         resetState();
     }
-    
-    private void resetState() {
+
+    private void resetState() { // synchronized call
         devicesTried.clear();
         thread = null;
         ready = false;
-        released = false;
+        running = false;
         shouldRelease = false;
         initConnection = null;
         releaseConnection = null;
     }
 
-    /** 
+    /**
      * Start the shared resource runner thread, if not running.
      * <p>
      * Validate the thread upfront and release all related resource if it was killed.
      * </p>
-     * 
+     *
      * @return the shared resource runner thread.
      */
     public Thread start() {
-        if(null != thread && !thread.isAlive()) {
-            // thread was killed unrecognized ..
-            if (DEBUG) {
-                System.err.println("SharedResourceRunner.start() - dead-old-thread cleanup - "+Thread.currentThread().getName());
+        synchronized (this) {
+            if(null != thread && !thread.isAlive()) {
+                // thread was killed unrecognized ..
+                if (DEBUG) {
+                    System.err.println("SharedResourceRunner.start() - dead-old-thread cleanup - "+getThreadName());
+                }
+                releaseSharedResources();
+                thread = null;
+                running = false;
             }
-            releaseSharedResources();
-            thread = null;
-        }        
-        if(null == thread) {
-            if (DEBUG) {
-                System.err.println("SharedResourceRunner.start() - start new Thread - "+Thread.currentThread().getName());
+            if( null == thread ) {
+                if (DEBUG) {
+                    System.err.println("SharedResourceRunner.start() - start new Thread - "+getThreadName());
+                }
+                resetState();
+                thread = new Thread(this, getThreadName()+"-SharedResourceRunner");
+                thread.setDaemon(true); // Allow JVM to exit, even if this one is running
+                thread.start();
+                while (!running) {
+                    try {
+                        this.wait();
+                    } catch (InterruptedException ex) { }
+                }
             }
-            resetState();
-            thread = new Thread(this, Thread.currentThread().getName()+"-SharedResourceRunner");
-            thread.setDaemon(true); // Allow JVM to exit, even if this one is running
-            thread.start();
         }
         return thread;
     }
-    
+
     public void stop() {
-        if(null != thread) {
-            if (DEBUG) {
-                System.err.println("SharedResourceRunner.stop() - "+Thread.currentThread().getName());
-            }
-            synchronized (this) {
-                shouldRelease = true;
-                this.notifyAll();
-    
-                while (!released) {
-                    try {
-                        this.wait();
-                    } catch (InterruptedException ex) {
+        synchronized (this) {
+            if(null != thread) {
+                if (DEBUG) {
+                    System.err.println("SharedResourceRunner.stop() - "+getThreadName());
+                }
+                synchronized (this) {
+                    shouldRelease = true;
+                    this.notifyAll();
+
+                    while (running) {
+                        try {
+                            this.wait();
+                        } catch (InterruptedException ex) { }
                     }
                 }
             }
         }
     }
-    
+
     public SharedResourceRunner.Resource getOrCreateShared(AbstractGraphicsDevice device) {
         SharedResourceRunner.Resource sr = null;
         if(null != device) {
-            start();
-            final String connection = device.getConnection();
-            sr = impl.mapGet(connection);
-            if (null == sr && !getDeviceTried(connection)) {
-                addDeviceTried(connection);
-                if (DEBUG) {
-                    System.err.println("SharedResourceRunner.getOrCreateShared() " + connection + ": trying - "+Thread.currentThread().getName());
-                }
-                doAndWait(connection, null);
+            synchronized (this) {
+                start();
+                final String connection = device.getConnection();
                 sr = impl.mapGet(connection);
-                if (DEBUG) {
-                    System.err.println("SharedResourceRunner.getOrCreateShared() " + connection + ": "+ ( ( null != sr ) ? "success" : "failed" ) +" - "+Thread.currentThread().getName());
+                if (null == sr) {
+                    if ( !getDeviceTried(connection) ) {
+                        addDeviceTried(connection);
+                        if (DEBUG) {
+                            System.err.println("SharedResourceRunner.getOrCreateShared() " + connection + ": trying - "+getThreadName());
+                        }
+                        if ( impl.isDeviceSupported(connection) ) {
+                            doAndWait(connection, null);
+                            sr = impl.mapGet(connection);
+                        }
+                        if (DEBUG) {
+                            System.err.println("SharedResourceRunner.getOrCreateShared() " + connection + ": "+ ( ( null != sr ) ? "success" : "failed" ) +" - "+getThreadName());
+                        }
+                    }
                 }
             }
         }
@@ -170,16 +201,18 @@ public class SharedResourceRunner implements Runnable {
     public SharedResourceRunner.Resource releaseShared(AbstractGraphicsDevice device) {
         SharedResourceRunner.Resource sr = null;
         if(null != device) {
-            String connection = device.getConnection();
-            sr = impl.mapGet(connection);    
-            if (null != sr) {
-                removeDeviceTried(connection);
-                if (DEBUG) {
-                    System.err.println("SharedResourceRunner.releaseShared() " + connection + ": trying - "+Thread.currentThread().getName());
-                }
-                doAndWait(null, connection);
-                if (DEBUG) {
-                    System.err.println("SharedResourceRunner.releaseShared() " + connection + ": done - "+Thread.currentThread().getName());
+            synchronized (this) {
+                final String connection = device.getConnection();
+                sr = impl.mapGet(connection);
+                if (null != sr) {
+                    removeDeviceTried(connection);
+                    if (DEBUG) {
+                        System.err.println("SharedResourceRunner.releaseShared() " + connection + ": trying - "+getThreadName());
+                    }
+                    doAndWait(null, connection);
+                    if (DEBUG) {
+                        System.err.println("SharedResourceRunner.releaseShared() " + connection + ": done - "+getThreadName());
+                    }
                 }
             }
         }
@@ -187,18 +220,17 @@ public class SharedResourceRunner implements Runnable {
     }
 
     private final void doAndWait(String initConnection, String releaseConnection) {
-        // wait until thread becomes ready to init new device,
-        // pass the device and release the sync
-        final String threadName = Thread.currentThread().getName();
-        if (DEBUG) {
-            System.err.println("SharedResourceRunner.doAndWait() START init: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
-        }
         synchronized (this) {
-            while (!ready) {
+            // wait until thread becomes ready to init new device,
+            // pass the device and release the sync
+            final String threadName = getThreadName();
+            if (DEBUG) {
+                System.err.println("SharedResourceRunner.doAndWait() START init: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
+            }
+            while (!ready && running) {
                 try {
                     this.wait();
-                } catch (InterruptedException ex) {
-                }
+                } catch (InterruptedException ex) { }
             }
             if (DEBUG) {
                 System.err.println("SharedResourceRunner.doAndWait() set command: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
@@ -208,11 +240,10 @@ public class SharedResourceRunner implements Runnable {
             this.notifyAll();
 
             // wait until thread has init/released the device
-            while (!ready || null != this.initConnection || null != this.releaseConnection) {
+            while ( running && ( !ready || null != this.initConnection || null != this.releaseConnection ) ) {
                 try {
                     this.wait();
-                } catch (InterruptedException ex) {
-                }
+                } catch (InterruptedException ex) { }
             }
             if (DEBUG) {
                 System.err.println("SharedResourceRunner.initializeAndWait END init: " + initConnection + ", release: "+releaseConnection+" - "+threadName);
@@ -221,14 +252,17 @@ public class SharedResourceRunner implements Runnable {
         // done
     }
 
+    @Override
     public final void run() {
-        final String threadName = Thread.currentThread().getName();
+        final String threadName = getThreadName();
 
         if (DEBUG) {
             System.err.println("SharedResourceRunner.run(): STARTED - " + threadName);
         }
 
         synchronized (this) {
+            running = true;
+
             while (!shouldRelease) {
                 try {
                     // wait for stop or init
@@ -238,10 +272,10 @@ public class SharedResourceRunner implements Runnable {
                     }
                     notifyAll();
                     this.wait();
-                } catch (InterruptedException ex) { 
+                } catch (InterruptedException ex) {
                     shouldRelease = true;
                     if(DEBUG) {
-                        System.err.println("SharedResourceRunner.run(): INTERRUPTED - "+Thread.currentThread().getName());                        
+                        System.err.println("SharedResourceRunner.run(): INTERRUPTED - "+threadName);
                         ex.printStackTrace();
                     }
                 }
@@ -260,9 +294,7 @@ public class SharedResourceRunner implements Runnable {
                         try {
                             sr = impl.createSharedResource(initConnection);
                         } catch (Exception e) {
-                            if(DEBUG) {
-                                e.printStackTrace();
-                            }
+                            e.printStackTrace();
                         }
                         if (null != sr) {
                             impl.mapPut(initConnection, sr);
@@ -280,7 +312,7 @@ public class SharedResourceRunner implements Runnable {
                             } catch (Exception e) {
                                 e.printStackTrace();
                             }
-                        }                        
+                        }
                     }
                 }
                 initConnection = null;
@@ -298,25 +330,25 @@ public class SharedResourceRunner implements Runnable {
             }
 
             shouldRelease = false;
-            released = true;
+            running = false;
             thread = null;
             notifyAll();
         }
     }
 
-    private void releaseSharedResources() {
-        synchronized (devicesTried) {
-            devicesTried.clear();
-        }
+    private void releaseSharedResources() { // synchronized call
+        devicesTried.clear();
         Collection<Resource> sharedResources = impl.mapValues();
         for (Iterator<Resource> iter = sharedResources.iterator(); iter.hasNext();) {
             try {
                 impl.releaseSharedResource(iter.next());
             } catch (Throwable t) {
-                System.err.println("Catched Exception: "+t.getStackTrace()+" - "+Thread.currentThread().getName());
+                System.err.println("Catched Exception on thread "+getThreadName());
                 t.printStackTrace();
             }
         }
         impl.clear();
     }
+
+    protected static String getThreadName() { return Thread.currentThread().getName(); }
 }
diff --git a/src/jogl/classes/jogamp/opengl/ThreadingImpl.java b/src/jogl/classes/jogamp/opengl/ThreadingImpl.java
index 61a47675f..bf700d970 100644
--- a/src/jogl/classes/jogamp/opengl/ThreadingImpl.java
+++ b/src/jogl/classes/jogamp/opengl/ThreadingImpl.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2009 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,7 +29,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  */
 
 package jogamp.opengl;
@@ -49,14 +49,14 @@ import com.jogamp.common.util.ReflectionUtil;
 
 public class ThreadingImpl {
     public enum Mode {
-        MT(0), ST_AWT(1), ST_WORKER(2); 
-        
+        MT(0), ST_AWT(1), ST_WORKER(2);
+
         public final int id;
 
         Mode(int id){
             this.id = id;
         }
-    }    
+    }
 
     protected static final boolean DEBUG = Debug.debug("Threading");
 
@@ -68,10 +68,11 @@ public class ThreadingImpl {
     private static boolean _isX11;
 
     private static final ToolkitThreadingPlugin threadingPlugin;
-  
+
     static {
         threadingPlugin =
             AccessController.doPrivileged(new PrivilegedAction<ToolkitThreadingPlugin>() {
+                    @Override
                     public ToolkitThreadingPlugin run() {
                         final String singleThreadProp;
                         {
@@ -89,13 +90,12 @@ public class ThreadingImpl {
                         // problems.
                         hasAWT = GLProfile.isAWTAvailable();
 
-                        String osType = NativeWindowFactory.getNativeWindowType(false);
-                        _isX11 = NativeWindowFactory.TYPE_X11.equals(osType);
+                        _isX11 = NativeWindowFactory.TYPE_X11 == NativeWindowFactory.getNativeWindowType(false);
 
                         // default setting
                         singleThreaded = true;
                         mode  = ( hasAWT ? Mode.ST_AWT : Mode.ST_WORKER );
-                        
+
                         if (singleThreadProp != null) {
                             if (singleThreadProp.equals("true") ||
                                 singleThreadProp.equals("auto")) {
@@ -114,7 +114,7 @@ public class ThreadingImpl {
                                 throw new RuntimeException("Unsupported value for property jogl.1thread: "+singleThreadProp+", should be [true/auto, worker, awt or false]");
                             }
                         }
-                        
+
                         ToolkitThreadingPlugin threadingPlugin=null;
                         if(hasAWT) {
                             // try to fetch the AWTThreadingPlugin
@@ -140,9 +140,9 @@ public class ThreadingImpl {
     public static boolean isX11() { return _isX11; }
     public static Mode getMode() { return mode; }
 
-    /** If an implementation of the javax.media.opengl APIs offers a 
-        multithreading option but the default behavior is single-threading, 
-        this API provides a mechanism for end users to disable single-threading 
+    /** If an implementation of the javax.media.opengl APIs offers a
+        multithreading option but the default behavior is single-threading,
+        this API provides a mechanism for end users to disable single-threading
         in this implementation.  Users are strongly discouraged from
         calling this method unless they are aware of all of the
         consequences and are prepared to enforce some amount of
@@ -152,7 +152,7 @@ public class ThreadingImpl {
         GLPbuffer. Currently there is no supported way to re-enable it
         once disabled, partly to discourage careless use of this
         method. This method should be called as early as possible in an
-        application. */ 
+        application. */
     public static final void disableSingleThreading() {
         singleThreaded = false;
         if (Debug.verbose()) {
@@ -184,7 +184,7 @@ public class ThreadingImpl {
                 throw new InternalError("Illegal single-threading mode " + mode);
         }
     }
-    
+
     public static final boolean isToolkitThread() throws GLException {
         if(null!=threadingPlugin) {
             return threadingPlugin.isToolkitThread();
@@ -216,7 +216,7 @@ public class ThreadingImpl {
                 throw new InternalError("Illegal single-threading mode " + mode);
         }
     }
-    
+
     public static final void invokeOnWorkerThread(boolean wait, Runnable r) throws GLException {
         GLWorkerThread.start(); // singleton start via volatile-dbl-checked-locking
         try {
@@ -225,6 +225,6 @@ public class ThreadingImpl {
             throw new GLException(e.getTargetException());
         } catch (InterruptedException e) {
             throw new GLException(e);
-        }        
+        }
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/ToolkitThreadingPlugin.java b/src/jogl/classes/jogamp/opengl/ToolkitThreadingPlugin.java
index 22972953a..06fb0fe91 100644
--- a/src/jogl/classes/jogamp/opengl/ToolkitThreadingPlugin.java
+++ b/src/jogl/classes/jogamp/opengl/ToolkitThreadingPlugin.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2012 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -46,7 +46,7 @@ public interface ToolkitThreadingPlugin {
   /** Indicates whether the current thread is the designated toolkit thread,
       if such semantics exists. */
   public boolean isToolkitThread() throws GLException;
-  
+
   /** Indicates whether the current thread is the thread on
       which this implementation of the javax.media.opengl APIs
       performs all of its OpenGL-related work. This method should only
diff --git a/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java b/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java
index 23f9161d4..25a0bc15d 100644
--- a/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java
+++ b/src/jogl/classes/jogamp/opengl/android/av/AndroidGLMediaPlayerAPI14.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -28,10 +28,17 @@
 package jogamp.opengl.android.av;
 
 import java.io.IOException;
+import java.util.List;
 
 import javax.media.opengl.GL;
 import javax.media.opengl.GLES2;
+import javax.media.opengl.GLException;
 
+import com.jogamp.common.os.AndroidVersion;
+import com.jogamp.common.os.Platform;
+import com.jogamp.opengl.util.TimeFrameI;
+import com.jogamp.opengl.util.av.GLMediaPlayer;
+import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureSequence;
 
 import jogamp.common.os.android.StaticContext;
@@ -39,7 +46,9 @@ import jogamp.opengl.util.av.GLMediaPlayerImpl;
 
 import android.graphics.SurfaceTexture;
 import android.graphics.SurfaceTexture.OnFrameAvailableListener;
+import android.hardware.Camera;
 import android.media.MediaPlayer;
+import android.media.MediaPlayer.OnCompletionListener;
 import android.net.Uri;
 import android.view.Surface;
 
@@ -47,6 +56,11 @@ import android.view.Surface;
  * Android implementation utilizes API level 14 (4.0.? ICS) features
  * as listed below.
  * <p>
+ * Implementation is single threaded only, since we are not able to utilize multiple textures.
+ * We would need to add an implementation for API level 16 using MediaCodec/MediaExtractor
+ * to expose multithreading on multiple surface/textures.
+ * </p>
+ * <p>
  * We utilize the {@link MediaPlayer} with direct to texture streaming.
  * The MediaPlayer uses <code>libstagefright</code> to access the OpenMAX AL implementation
  * for hardware decoding.
@@ -55,47 +69,63 @@ import android.view.Surface;
  *   <li>Android API Level 14: {@link MediaPlayer#setSurface(Surface)}</li>
  *   <li>Android API Level 14: {@link Surface#Surface(android.graphics.SurfaceTexture)}</li>
  * </ul>
+ * <p>
+ * Since the MediaPlayer API can only deal w/ <i>one</i> SurfaceTexture,
+ * we enforce <code>textureCount</code> = 2 via {@link #validateTextureCount(int)}
+ * and duplicate the single texture via {@link #createTexFrames(GL, int)} .. etc.
+ * Two instanceds of TextureFrame are required due our framework implementation w/ Ringbuffer and 'lastFrame' access.
+ * </p>
  */
 public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
     static final boolean available;
-    
+
     static {
-        available = true; // default .. TODO: May restrict availability ? 
+        boolean _avail = false;
+        if(Platform.OS_TYPE.equals(Platform.OSType.ANDROID)) {
+            if(AndroidVersion.SDK_INT >= 14) {
+                _avail = true;
+            }
+        }
+        available = _avail;
     }
-    
+
     public static final boolean isAvailable() { return available; }
-    
-    MediaPlayer mp;
-    volatile boolean updateSurface = false;
-    Object updateSurfaceLock = new Object();
-    TextureSequence.TextureFrame lastTexFrame = null;
+
+    private MediaPlayer mp;
+    private Camera cam;
+    private long playStart = 0;
+    private volatile boolean updateSurface = false;
+    private final Object updateSurfaceLock = new Object();
+    private SurfaceTextureFrame singleSTexFrame = null;
+    private int sTexFrameCount = 0;
+    private boolean sTexFrameAttached = false;
+    private volatile boolean eos = false;
 
     /**
     private static String toString(MediaPlayer m) {
         if(null == m) return "<nil>";
         return "MediaPlayer[playing "+m.isPlaying()+", pos "+m.getCurrentPosition()/1000.0f+"s, "+m.getVideoWidth()+"x"+m.getVideoHeight()+"]";
     } */
-    
+
     public AndroidGLMediaPlayerAPI14() {
         super();
         if(!available) {
             throw new RuntimeException("AndroidGLMediaPlayerAPI14 not available");
         }
         this.setTextureTarget(GLES2.GL_TEXTURE_EXTERNAL_OES);
-        this.setTextureCount(1);
-        mp = new MediaPlayer();
     }
 
     @Override
-    protected boolean setPlaySpeedImpl(float rate) {
+    protected final boolean setPlaySpeedImpl(float rate) {
+        // FIXME
         return false;
     }
 
     @Override
-    protected boolean startImpl() {
-        if(null != mp) {        
+    protected final boolean setAudioVolumeImpl(float v) {
+        if(null != mp) {
             try {
-                mp.start();
+                mp.setVolume(v, v);
                 return true;
             } catch (IllegalStateException ise) {
                 if(DEBUG) {
@@ -107,11 +137,24 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
     }
 
     @Override
-    protected boolean pauseImpl() {
+    protected final boolean playImpl() {
+        playStart = Platform.currentTimeMillis();
         if(null != mp) {
-            wakeUp(false);
             try {
-                mp.pause();
+                mp.start();
+                eos = false;
+                mp.setOnCompletionListener(onCompletionListener);
+                return true;
+            } catch (IllegalStateException ise) {
+                if(DEBUG) {
+                    ise.printStackTrace();
+                }
+            }
+        } else if( null != cam ) {
+            try {
+                if( sTexFrameAttached ) {
+                    cam.startPreview();
+                }
                 return true;
             } catch (IllegalStateException ise) {
                 if(DEBUG) {
@@ -123,11 +166,21 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
     }
 
     @Override
-    protected boolean stopImpl() {
+    protected final boolean pauseImpl() {
         if(null != mp) {
             wakeUp(false);
             try {
-                mp.stop();
+                mp.pause();
+                return true;
+            } catch (IllegalStateException ise) {
+                if(DEBUG) {
+                    ise.printStackTrace();
+                }
+            }
+        } else if( null != cam ) {
+            wakeUp(false);
+            try {
+                cam.stopPreview();
                 return true;
             } catch (IllegalStateException ise) {
                 if(DEBUG) {
@@ -137,9 +190,9 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
         }
         return false;
     }
-    
+
     @Override
-    protected int seekImpl(int msec) {
+    protected final int seekImpl(int msec) {
         if(null != mp) {
             mp.seekTo(msec);
             return mp.getCurrentPosition();
@@ -147,40 +200,6 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
         return 0;
     }
 
-    @Override
-    protected TextureSequence.TextureFrame getLastTextureImpl() {
-        return lastTexFrame;
-    }
-
-    @Override
-    protected TextureSequence.TextureFrame getNextTextureImpl(GL gl, boolean blocking) {
-        if(null != stex && null != mp) {
-            // Only block once, no while-loop. 
-            // This relaxes locking code of non crucial resources/events.
-            boolean update = updateSurface;
-            if(!update && blocking) {
-                synchronized(updateSurfaceLock) {
-                    if(!updateSurface) { // volatile OK.
-                        try {
-                            updateSurfaceLock.wait();
-                        } catch (InterruptedException e) {
-                            e.printStackTrace();
-                        }
-                    }
-                    updateSurface = false;
-                    update = true;
-                }
-            }
-            if(update) {
-                stex.updateTexImage();
-                // stex.getTransformMatrix(atex.getSTMatrix());
-                lastTexFrame=texFrames[0];
-            }
-            
-        }
-        return lastTexFrame;
-    }
-    
     private void wakeUp(boolean newFrame) {
         synchronized(updateSurfaceLock) {
             if(newFrame) {
@@ -189,29 +208,80 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
             updateSurfaceLock.notifyAll();
         }
     }
-    
+
     @Override
-    protected int getCurrentPositionImpl() {
-        return null != mp ? mp.getCurrentPosition() : 0;
-    }
+    protected final int getAudioPTSImpl() { return null != mp ? mp.getCurrentPosition() : 0; }
 
     @Override
-    protected void destroyImpl(GL gl) {
+    protected final void destroyImpl(GL gl) {
         if(null != mp) {
             wakeUp(false);
+            try {
+                mp.stop();
+            } catch (IllegalStateException ise) {
+                if(DEBUG) {
+                    ise.printStackTrace();
+                }
+            }
             mp.release();
             mp = null;
         }
+        if( null != cam ) {
+            wakeUp(false);
+            try {
+                cam.stopPreview();
+            } catch (IllegalStateException ise) {
+                if(DEBUG) {
+                    ise.printStackTrace();
+                }
+            }
+            cam.release();
+            cam = null;
+        }
     }
-    
-    SurfaceTexture stex = null;
-    
+
+    public static class SurfaceTextureFrame extends TextureSequence.TextureFrame {
+        public SurfaceTextureFrame(Texture t, SurfaceTexture stex) {
+            super(t);
+            this.surfaceTex = stex;
+        }
+
+        public String toString() {
+            return "SurfaceTextureFrame[pts " + pts + " ms, l " + duration + " ms, texID "+ texture.getTextureObject() + ", " + surfaceTex + "]";
+        }
+        public final SurfaceTexture surfaceTex;
+    }
+
     @Override
-    protected void initGLStreamImpl(GL gl, int[] texNames) throws IOException {
-        if(null!=mp && null!=urlConn) {
+    protected final void initStreamImpl(final int vid, final int aid) throws IOException {
+        if( null == streamLoc ) {
+            return;
+        }
+        if( null == mp && null == cam ) {
+            if( null == cameraPath ) {
+                mp = new MediaPlayer();
+            } else {
+                int cameraId = 0;
+                try {
+                    cameraId = Integer.valueOf(cameraPath);
+                } catch (NumberFormatException nfe) {}
+                if( 0 <= cameraId && cameraId < Camera.getNumberOfCameras() ) {
+                    cam = Camera.open(cameraId);
+                } else {
+                    cam = Camera.open();
+                }
+            }
+        }
+
+        if(null!=mp) {
+            if( GLMediaPlayer.STREAM_ID_NONE == aid ) {
+                mp.setVolume(0f, 0f);
+                // FIXME: Disable audio handling
+            } // else FIXME: Select aid !
+            // Note: Both FIXMEs seem to be n/a via Android's MediaPlayer -> Switch to API level 16 MediaCodec/MediaExtractor ..
             try {
-                final Uri uri = Uri.parse(urlConn.getURL().toExternalForm());        
-                mp.setDataSource(StaticContext.getContext(), uri);
+                final Uri _uri = Uri.parse(streamLoc.toString());
+                mp.setDataSource(StaticContext.getContext(), _uri);
             } catch (IllegalArgumentException e) {
                 throw new RuntimeException(e);
             } catch (SecurityException e) {
@@ -219,44 +289,206 @@ public class AndroidGLMediaPlayerAPI14 extends GLMediaPlayerImpl {
             } catch (IllegalStateException e) {
                 throw new RuntimeException(e);
             }
-            stex = new SurfaceTexture(texNames[0]); // only 1 texture
-            stex.setOnFrameAvailableListener(onFrameAvailableListener);
-            final Surface surf = new Surface(stex);
-            mp.setSurface(surf);
-            surf.release();
+            mp.setSurface(null);
             try {
                 mp.prepare();
             } catch (IOException ioe) {
-                throw new IOException("MediaPlayer failed to process stream <"+urlConn.getURL().toExternalForm()+">: "+ioe.getMessage(), ioe);
+                throw new IOException("MediaPlayer failed to process stream <"+streamLoc.toString()+">: "+ioe.getMessage(), ioe);
+            }
+            final int r_aid = GLMediaPlayer.STREAM_ID_NONE == aid ? GLMediaPlayer.STREAM_ID_NONE : 1 /* fake */;
+            final String icodec = "android";
+            updateAttributes(0 /* fake */, r_aid,
+                             mp.getVideoWidth(), mp.getVideoHeight(), 0,
+                             0, 0, 0f,
+                             0, 0, mp.getDuration(), icodec, icodec);
+            /**
+                mp.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
+                    @Override
+                    public void onPrepared(final MediaPlayer mp) {
+                        final int r_aid = GLMediaPlayer.STREAM_ID_NONE == aid ? GLMediaPlayer.STREAM_ID_NONE : 1; // fake
+                        final String icodec = "android";
+                        updateAttributes(0, r_aid, // fake
+                                         mp.getVideoWidth(), mp.getVideoHeight(), 0,
+                                         0, 0, 0f,
+                                         0, 0, mp.getDuration(), icodec, icodec);
+                    }
+                });
+                mp.prepareAsync();
+             *
+             */
+        } else if( null != cam ) {
+            final String icodec = "android";
+            final int[] fpsRange = { 0, 0 };
+            final Camera.Parameters p = cam.getParameters();
+            p.getPreviewFpsRange(fpsRange);
+            final Camera.Size size = p.getPreviewSize();
+            if( DEBUG ) {
+                final int picFmt = p.getPictureFormat();
+                final Camera.Size prefSize = p.getPreferredPreviewSizeForVideo();
+                System.err.println("MediaPlayer.Camera: fps "+fpsRange[0]+".."+fpsRange[1]+", size[pref "+camSz2Str(prefSize)+", cur "+camSz2Str(size)+"], fmt "+picFmt);
+                final List<Camera.Size> supSizes = p.getSupportedVideoSizes();
+                if( null != supSizes  ) {
+                    for(int i=0; i<supSizes.size(); i++) {
+                        System.err.println("size #"+i+": "+camSz2Str(supSizes.get(i)));
+                    }
+                }
             }
-            updateAttributes(mp.getVideoWidth(), mp.getVideoHeight(), 
-                             0, 0, 0, 
-                             0f, 0, mp.getDuration(), 
-                             null, null);
+            updateAttributes(0 /* fake */, GLMediaPlayer.STREAM_ID_NONE,
+                             size.width, size.height,
+                             0, 0, 0,
+                             fpsRange[1]/1000f,
+                             0, 0, 0, icodec, icodec);
+        }
+    }
+    private static String camSz2Str(Camera.Size csize) {
+        if( null != csize ) {
+            return csize.width+"x"+csize.height;
+        } else {
+            return "n/a";
         }
     }
-    
     @Override
-    protected TextureSequence.TextureFrame createTexImage(GL gl, int idx, int[] tex) {
-        lastTexFrame = new TextureSequence.TextureFrame( createTexImageImpl(gl, idx, tex, width, height, true) );
-        return lastTexFrame; 
+    protected final void initGLImpl(GL gl) throws IOException, GLException {
+        // NOP
     }
-    
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Returns {@link #TEXTURE_COUNT_MIN}, using a single texture
+     * </p>
+     */
     @Override
-    protected void destroyTexImage(GL gl, TextureSequence.TextureFrame imgTex) {
-        if(null != stex) {
-            stex.release();
-            stex = null;
+    protected int validateTextureCount(int desiredTextureCount) {
+        return TEXTURE_COUNT_MIN;
+    }
+
+    @Override
+    protected final int getNextTextureImpl(GL gl, TextureFrame nextFrame) {
+        int pts = TimeFrameI.INVALID_PTS;
+        if(null != mp || null != cam) {
+            final SurfaceTextureFrame sTexFrame = null != nextFrame ? (SurfaceTextureFrame) nextFrame : singleSTexFrame;
+            final SurfaceTexture surfTex = sTexFrame.surfaceTex;
+            if( !sTexFrameAttached ) {
+                sTexFrameAttached = true;
+                final Surface surface;
+                if( null != mp ) {
+                    surface = new Surface(sTexFrame.surfaceTex);
+                    mp.setSurface(surface);
+                } else {
+                    surface = null;
+                    try {
+                        cam.setPreviewTexture(sTexFrame.surfaceTex);
+                        cam.startPreview();
+                    } catch (IOException ioe) {
+                        throw new RuntimeException("MediaPlayer failed to process stream <"+streamLoc.toString()+">: "+ioe.getMessage(), ioe);
+                    }
+                }
+                if( null != surface ) {
+                    surface.release();
+                }
+                surfTex.setOnFrameAvailableListener(onFrameAvailableListener);
+            }
+            if( eos || (null != mp && !mp.isPlaying() ) ) {
+                eos = true;
+                pts = TimeFrameI.END_OF_STREAM_PTS;
+            } else {
+                // Only block once, no while-loop.
+                // This relaxes locking code of non crucial resources/events.
+                boolean update = updateSurface;
+                if( !update ) {
+                    synchronized(updateSurfaceLock) {
+                        if(!updateSurface) { // volatile OK.
+                            try {
+                                updateSurfaceLock.wait();
+                            } catch (InterruptedException e) {
+                                e.printStackTrace();
+                            }
+                        }
+                        update = updateSurface;
+                        updateSurface = false;
+                    }
+                }
+                if(update) {
+                    surfTex.updateTexImage();
+                    // nextFrame.setPTS( (int) ( nextSTex.getTimestamp() / 1000000L ) ); // nano -9 -> milli -3
+                    if( null != mp ) {
+                        pts = mp.getCurrentPosition();
+                    } else {
+                        pts = (int) ( Platform.currentTimeMillis() - playStart );
+                    }
+                    // stex.getTransformMatrix(atex.getSTMatrix());
+                }
+            }
+            nextFrame.setPTS( pts );
+        }
+        return pts;
+    }
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Creates only one single texture and duplicated content to 2 TextureFrames
+     * </p>
+     */
+    @Override
+    protected TextureFrame[] createTexFrames(GL gl, final int count) {
+        final int[] texNames = new int[1];
+        gl.glGenTextures(1, texNames, 0);
+        final int err = gl.glGetError();
+        if( GL.GL_NO_ERROR != err ) {
+            throw new RuntimeException("TextureNames creation failed (num: 1/"+count+"): err "+toHexString(err));
+        }
+        final TextureFrame[] texFrames = new TextureFrame[count];
+        for(int i=0; i<count; i++) {
+            texFrames[i] = createTexImage(gl, texNames[0]);
         }
-        lastTexFrame = null;
-        super.destroyTexImage(gl, imgTex);
+        return texFrames;
     }
-    
-    protected OnFrameAvailableListener onFrameAvailableListener = new OnFrameAvailableListener() {
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Returns the single texture, which is created at 1st call.
+     * </p>
+     */
+    @Override
+    protected final TextureSequence.TextureFrame createTexImage(GL gl, int texName) {
+        sTexFrameCount++;
+        if( 1 == sTexFrameCount ) {
+            singleSTexFrame = new SurfaceTextureFrame( createTexImageImpl(gl, texName, width, height), new SurfaceTexture(texName) );
+        }
+        return singleSTexFrame;
+    }
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Destroys the single texture at last call.
+     * </p>
+     */
+    @Override
+    protected final void destroyTexFrame(GL gl, TextureSequence.TextureFrame frame) {
+        sTexFrameCount--;
+        if( 0 == sTexFrameCount ) {
+            singleSTexFrame = null;
+            sTexFrameAttached = false;
+            final SurfaceTextureFrame sFrame = (SurfaceTextureFrame) frame;
+            sFrame.surfaceTex.release();
+            super.destroyTexFrame(gl, frame);
+        }
+    }
+
+    private final OnFrameAvailableListener onFrameAvailableListener = new OnFrameAvailableListener() {
         @Override
         public void onFrameAvailable(SurfaceTexture surfaceTexture) {
             wakeUp(true);
-            AndroidGLMediaPlayerAPI14.this.newFrameAvailable();
-        }        
-    };        
+        }
+    };
+
+    private final OnCompletionListener onCompletionListener = new OnCompletionListener() {
+        @Override
+        public void onCompletion(MediaPlayer mp) {
+            eos = true;
+        }
+    };
 }
diff --git a/src/jogl/classes/jogamp/opengl/awt/AWTThreadingPlugin.java b/src/jogl/classes/jogamp/opengl/awt/AWTThreadingPlugin.java
index 983f11133..72c9ac54b 100644
--- a/src/jogl/classes/jogamp/opengl/awt/AWTThreadingPlugin.java
+++ b/src/jogl/classes/jogamp/opengl/awt/AWTThreadingPlugin.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -44,7 +44,8 @@ import java.awt.EventQueue;
 
 import javax.media.opengl.GLException;
 
-import jogamp.common.awt.AWTEDTExecutor;
+import com.jogamp.common.util.awt.AWTEDTExecutor;
+
 import jogamp.opengl.GLWorkerThread;
 import jogamp.opengl.ThreadingImpl;
 import jogamp.opengl.ToolkitThreadingPlugin;
@@ -53,10 +54,12 @@ public class AWTThreadingPlugin implements ToolkitThreadingPlugin {
 
   public AWTThreadingPlugin() {}
 
+  @Override
   public final boolean isToolkitThread() throws GLException {
       return EventQueue.isDispatchThread();
   }
-  
+
+  @Override
   public final boolean isOpenGLThread() throws GLException {
     switch (ThreadingImpl.getMode()) {
       case ST_AWT:
@@ -82,6 +85,7 @@ public class AWTThreadingPlugin implements ToolkitThreadingPlugin {
     }
   }
 
+  @Override
   public final void invokeOnOpenGLThread(boolean wait, Runnable r) throws GLException {
     switch (ThreadingImpl.getMode()) {
       case ST_AWT:
@@ -94,11 +98,7 @@ public class AWTThreadingPlugin implements ToolkitThreadingPlugin {
         // QFT which is not allowed. For now, on X11 platforms,
         // continue to perform this work on the EDT.
         if (wait && Java2D.isOGLPipelineActive() && !ThreadingImpl.isX11()) {
-          if(wait) {
-              Java2D.invokeWithOGLContextCurrent(null, r);
-          } else {
-              
-          }
+          Java2D.invokeWithOGLContextCurrent(null, r);
         } else {
           AWTEDTExecutor.singleton.invoke(wait, r);
         }
diff --git a/src/jogl/classes/jogamp/opengl/awt/AWTTilePainter.java b/src/jogl/classes/jogamp/opengl/awt/AWTTilePainter.java
new file mode 100644
index 000000000..1c1d2350a
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/awt/AWTTilePainter.java
@@ -0,0 +1,400 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.awt;
+
+import java.awt.Color;
+import java.awt.Graphics2D;
+import java.awt.Rectangle;
+import java.awt.RenderingHints;
+import java.awt.Shape;
+import java.awt.geom.AffineTransform;
+import java.awt.geom.NoninvertibleTransformException;
+import java.awt.geom.Rectangle2D;
+import java.awt.image.BufferedImage;
+import java.awt.image.DataBufferInt;
+import java.io.File;
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.Map.Entry;
+
+import javax.imageio.ImageIO;
+import javax.media.nativewindow.util.DimensionImmutable;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLAutoDrawable;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLEventListener;
+
+import jogamp.opengl.Debug;
+
+import com.jogamp.opengl.util.TileRenderer;
+import com.jogamp.opengl.util.TileRendererBase;
+import com.jogamp.opengl.util.GLPixelBuffer.GLPixelAttributes;
+import com.jogamp.opengl.util.awt.AWTGLPixelBuffer;
+import com.jogamp.opengl.util.awt.AWTGLPixelBuffer.AWTGLPixelBufferProvider;
+
+/**
+ * Implementing AWT {@link Graphics2D} based {@link TileRenderer} <i>painter</i>.
+ * <p>
+ * Maybe utilized for AWT printing.
+ * </p>
+ */
+public class AWTTilePainter {
+    private static final boolean DEBUG_TILES = Debug.debug("TileRenderer.PNG");
+
+    public final TileRenderer renderer;
+    public final int componentCount;
+    public final double scaleMatX, scaleMatY;
+    public final int customTileWidth, customTileHeight, customNumSamples;
+    public final boolean verbose;
+
+    /** Default for OpenGL: True */
+    public boolean flipVertical;
+    /** Default for OpenGL: True */
+    public boolean originBottomLeft;
+    private AWTGLPixelBuffer tBuffer = null;
+    private BufferedImage vFlipImage = null;
+    private Graphics2D g2d = null;
+    private AffineTransform saveAT = null;
+
+    public static void dumpHintsAndScale(Graphics2D g2d) {
+          final RenderingHints rHints = g2d.getRenderingHints();
+          final Set<Entry<Object, Object>> rEntries = rHints.entrySet();
+          int count = 0;
+          for(Iterator<Entry<Object, Object>> rEntryIter = rEntries.iterator(); rEntryIter.hasNext(); count++) {
+              final Entry<Object, Object> rEntry = rEntryIter.next();
+              System.err.println("Hint["+count+"]: "+rEntry.getKey()+" -> "+rEntry.getValue());
+          }
+          final AffineTransform aTrans = g2d.getTransform();
+          if( null != aTrans ) {
+              System.err.println(" type "+aTrans.getType());
+              System.err.println(" scale "+aTrans.getScaleX()+" x "+aTrans.getScaleY());
+              System.err.println(" move "+aTrans.getTranslateX()+" x "+aTrans.getTranslateY());
+              System.err.println(" mat  "+aTrans);
+          } else {
+              System.err.println(" null transform");
+          }
+    }
+
+    /**
+     * @return resulting number of samples by comparing w/ {@link #customNumSamples} and the caps-config, 0 if disabled
+     */
+    public int getNumSamples(GLCapabilitiesImmutable caps) {
+          if( 0 > customNumSamples ) {
+              return 0;
+          } else if( 0 < customNumSamples ) {
+              if ( !caps.getGLProfile().isGL2ES3() ) {
+                  return 0;
+              }
+              return Math.max(caps.getNumSamples(), customNumSamples);
+          } else {
+              return caps.getNumSamples();
+          }
+    }
+
+    /**
+     * Assumes a configured {@link TileRenderer}, i.e.
+     * an {@link TileRenderer#attachAutoDrawable(GLAutoDrawable) attached}
+     * {@link GLAutoDrawable} with {@link TileRenderer#setTileSize(int, int, int) set tile size}.
+     * <p>
+     * Sets the renderer to {@link TileRenderer#TR_TOP_TO_BOTTOM} row order.
+     * </p>
+     * <p>
+     * <code>componentCount</code> reflects opaque, i.e. 4 if non opaque.
+     * </p>
+     * @param renderer
+     * @param componentCount
+     * @param scaleMatX {@link Graphics2D} {@link Graphics2D#scale(double, double) scaling factor}, i.e. rendering 1/scaleMatX * width pixels
+     * @param scaleMatY {@link Graphics2D} {@link Graphics2D#scale(double, double) scaling factor}, i.e. rendering 1/scaleMatY * height pixels
+     * @param numSamples custom multisampling value: < 0 turns off, == 0 leaves as-is, > 0 enables using given num samples
+     * @param tileWidth custom tile width for {@link TileRenderer#setTileSize(int, int, int) tile renderer}, pass -1 for default.
+     * @param tileHeight custom tile height for {@link TileRenderer#setTileSize(int, int, int) tile renderer}, pass -1 for default.
+     * @param verbose
+     */
+    public AWTTilePainter(TileRenderer renderer, int componentCount, double scaleMatX, double scaleMatY, int numSamples, int tileWidth, int tileHeight, boolean verbose) {
+        this.renderer = renderer;
+        this.renderer.setGLEventListener(preTileGLEL, postTileGLEL);
+        this.componentCount = componentCount;
+        this.scaleMatX = scaleMatX;
+        this.scaleMatY = scaleMatY;
+        this.customNumSamples = numSamples;
+        this.customTileWidth= tileWidth;
+        this.customTileHeight = tileHeight;
+        this.verbose = verbose;
+        this.flipVertical = true;
+    }
+
+    @Override
+    public String toString() {
+        return "AWTTilePainter[flipVertical "+flipVertical+", startFromBottom "+originBottomLeft+", "+
+                renderer.toString()+"]";
+    }
+
+    /**
+     * @param flipVertical if <code>true</code>, the image will be flipped vertically (Default for OpenGL).
+     * @param originBottomLeft if <code>true</code>, the image's origin is on the bottom left (Default for OpenGL).
+     */
+    public void setGLOrientation(boolean flipVertical, boolean originBottomLeft) {
+        this.flipVertical = flipVertical;
+        this.originBottomLeft = originBottomLeft;
+    }
+
+    private static Rectangle2D getClipBounds2D(Graphics2D g) {
+        final Shape shape = g.getClip();
+        return null != shape ? shape.getBounds2D() : null;
+    }
+    private static Rectangle2D clipNegative(Rectangle2D in) {
+        if( null == in ) { return null; }
+        double x=in.getX(), y=in.getY(), width=in.getWidth(), height=in.getHeight();
+        if( 0 > x ) {
+            width += x;
+            x = 0;
+        }
+        if( 0 > y ) {
+            height += y;
+            y = 0;
+        }
+        return new Rectangle2D.Double(x, y, width, height);
+    }
+
+    /**
+     * Caches the {@link Graphics2D} instance for rendering.
+     * <p>
+     * Copies the current {@link Graphics2D} {@link AffineTransform}
+     * and scales {@link Graphics2D} w/ <code>scaleMatX</code> x <code>scaleMatY</code>.<br>
+     * After rendering, the {@link AffineTransform} should be reset via {@link #resetGraphics2D()}.
+     * </p>
+     * <p>
+     * Sets the {@link TileRenderer}'s {@link TileRenderer#setImageSize(int, int) image size}
+     * and {@link TileRenderer#setTileOffset(int, int) tile offset} according the
+     * the {@link Graphics2D#getClipBounds() graphics clip bounds}.
+     * </p>
+     * @param g2d Graphics2D instance used for transform and clipping
+     * @param width width of the AWT component in case clipping is null
+     * @param height height of the AWT component in case clipping is null
+     * @throws NoninvertibleTransformException if the {@link Graphics2D}'s {@link AffineTransform} {@link AffineTransform#invert() inversion} fails.
+     *                                         Since inversion is tested before scaling the given {@link Graphics2D}, caller shall ignore the whole <i>term</i>.
+     */
+    public void setupGraphics2DAndClipBounds(Graphics2D g2d, int width, int height) throws NoninvertibleTransformException {
+        this.g2d = g2d;
+        saveAT = g2d.getTransform();
+        if( null == saveAT ) {
+            saveAT = new AffineTransform(); // use identity
+        }
+        // We use double precision for scaling
+        //
+        // Setup original rectangles
+        final Rectangle2D dClipOrigR = getClipBounds2D(g2d);
+        final Rectangle2D dClipOrig = clipNegative(dClipOrigR);
+        final Rectangle2D dImageSizeOrig = new Rectangle2D.Double(0, 0, width, height);
+
+        // Retrieve scaled image-size and clip-bounds
+        // Note: Clip bounds lie within image-size!
+        final Rectangle2D dImageSizeScaled, dClipScaled;
+        {
+            final AffineTransform scaledATI;
+            {
+                final AffineTransform scaledAT = new AffineTransform(saveAT);
+                scaledAT.scale(scaleMatX, scaleMatY);
+                scaledATI = scaledAT.createInverse(); // -> NoninvertibleTransformException
+            }
+            Shape s0 = saveAT.createTransformedShape(dImageSizeOrig); // user in
+            dImageSizeScaled = scaledATI.createTransformedShape(s0).getBounds2D(); // scaled out
+            if( null == dClipOrig ) {
+                dClipScaled = (Rectangle2D) dImageSizeScaled.clone();
+            } else {
+                s0 = saveAT.createTransformedShape(dClipOrig); // user in
+                dClipScaled = scaledATI.createTransformedShape(s0).getBounds2D(); // scaled out
+            }
+        }
+        final Rectangle iClipScaled = dClipScaled.getBounds();
+        final Rectangle iImageSizeScaled = dImageSizeScaled.getBounds();
+        renderer.setImageSize(iImageSizeScaled.width, iImageSizeScaled.height);
+        renderer.clipImageSize(iClipScaled.width, iClipScaled.height);
+        final int clipH = Math.min(iImageSizeScaled.height, iClipScaled.height);
+        // Clip bounds lie within image-size!
+        // GL y-offset is lower-left origin, AWT y-offset upper-left.
+        scaledYOffset = iClipScaled.y;
+        renderer.setTileOffset(iClipScaled.x, iImageSizeScaled.height - ( iClipScaled.y + clipH ));
+
+        // Scale actual Grahics2D matrix
+        g2d.scale(scaleMatX, scaleMatY);
+
+        if( verbose ) {
+            System.err.println("AWT print.0: image "+dImageSizeOrig + " -> " + dImageSizeScaled + " -> " + iImageSizeScaled);
+            System.err.println("AWT print.0: clip  "+dClipOrigR + " -> " + dClipOrig + " -> " + dClipScaled + " -> " + iClipScaled);
+            System.err.println("AWT print.0: "+renderer);
+        }
+    }
+    private int scaledYOffset;
+
+    /** See {@ #setupGraphics2DAndClipBounds(Graphics2D)}. */
+    public void resetGraphics2D() {
+        g2d.setTransform(saveAT);
+    }
+
+    /**
+     * Disposes resources and {@link TileRenderer#detachAutoDrawable() detaches}
+     * the {@link TileRenderer}'s {@link GLAutoDrawable}.
+     */
+    public void dispose() {
+        renderer.detachAutoDrawable(); // tile-renderer -> printGLAD
+        g2d = null;
+        if( null != tBuffer ) {
+            tBuffer.dispose();
+            tBuffer = null;
+        }
+        if( null != vFlipImage ) {
+            vFlipImage.flush();
+            vFlipImage = null;
+        }
+    }
+
+    final GLEventListener preTileGLEL = new GLEventListener() {
+        @Override
+        public void init(GLAutoDrawable drawable) {}
+        @Override
+        public void dispose(GLAutoDrawable drawable) {}
+        @Override
+        public void display(GLAutoDrawable drawable) {
+            final GL gl = drawable.getGL();
+            if( null == tBuffer ) {
+                final int tWidth = renderer.getParam(TileRenderer.TR_TILE_WIDTH);
+                final int tHeight = renderer.getParam(TileRenderer.TR_TILE_HEIGHT);
+                final AWTGLPixelBufferProvider printBufferProvider = new AWTGLPixelBufferProvider( true /* allowRowStride */ );
+                final GLPixelAttributes pixelAttribs = printBufferProvider.getAttributes(gl, componentCount);
+                tBuffer = printBufferProvider.allocate(gl, pixelAttribs, tWidth, tHeight, 1, true, 0);
+                renderer.setTileBuffer(tBuffer);
+                if( flipVertical ) {
+                    vFlipImage = new BufferedImage(tBuffer.width, tBuffer.height, tBuffer.image.getType());
+                } else {
+                    vFlipImage = null;
+                }
+            }
+            if( verbose ) {
+                System.err.println("XXX tile-pre "+renderer);
+            }
+        }
+        @Override
+        public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {}
+    };
+    static int _counter = 0;
+    final GLEventListener postTileGLEL = new GLEventListener() {
+        @Override
+        public void init(GLAutoDrawable drawable) {
+        }
+        @Override
+        public void dispose(GLAutoDrawable drawable) {}
+        @Override
+        public void display(GLAutoDrawable drawable) {
+            final DimensionImmutable cis = renderer.getClippedImageSize();
+            final int tWidth = renderer.getParam(TileRendererBase.TR_CURRENT_TILE_WIDTH);
+            final int tHeight = renderer.getParam(TileRendererBase.TR_CURRENT_TILE_HEIGHT);
+            final int tY = renderer.getParam(TileRendererBase.TR_CURRENT_TILE_Y_POS);
+            final int tYOff = renderer.getParam(TileRenderer.TR_TILE_Y_OFFSET);
+            final int imgYOff = originBottomLeft ? 0 : renderer.getParam(TileRenderer.TR_TILE_HEIGHT) - tHeight; // imgYOff will be cut-off via sub-image
+            final int pX = renderer.getParam(TileRendererBase.TR_CURRENT_TILE_X_POS); // tileX == pX
+            final int pY = cis.getHeight() - ( tY - tYOff + tHeight ) + scaledYOffset;
+
+            // Copy temporary data into raster of BufferedImage for faster
+            // blitting Note that we could avoid this copy in the cases
+            // where !offscreenDrawable.isGLOriented(),
+            // but that's the software rendering path which is very slow anyway.
+            final BufferedImage dstImage;
+            if( DEBUG_TILES ) {
+                final String fname = String.format("file_%03d_0_tile_[%02d][%02d]_sz_%03dx%03d_pos0_%03d_%03d_yOff_%03d_pos1_%03d_%03d.png",
+                        _counter,
+                        renderer.getParam(TileRenderer.TR_CURRENT_COLUMN), renderer.getParam(TileRenderer.TR_CURRENT_ROW),
+                        tWidth, tHeight,
+                        pX, tY, tYOff, pX, pY).replace(' ', '_');
+                System.err.println("XXX file "+fname);
+                final File fout = new File(fname);
+                try {
+                    ImageIO.write(tBuffer.image, "png", fout);
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+            }
+            if( flipVertical ) {
+                final BufferedImage srcImage = tBuffer.image;
+                dstImage = vFlipImage;
+                final int[] src = ((DataBufferInt) srcImage.getRaster().getDataBuffer()).getData();
+                final int[] dst = ((DataBufferInt) dstImage.getRaster().getDataBuffer()).getData();
+                if( DEBUG_TILES ) {
+                    Arrays.fill(dst, 0x55);
+                }
+                final int incr = tBuffer.width;
+                int srcPos = 0;
+                int destPos = (tHeight - 1) * tBuffer.width;
+                for (; destPos >= 0; srcPos += incr, destPos -= incr) {
+                    System.arraycopy(src, srcPos, dst, destPos, incr);
+                }
+            } else {
+                dstImage = tBuffer.image;
+            }
+            if( DEBUG_TILES ) {
+                final String fname = String.format("file_%03d_1_tile_[%02d][%02d]_sz_%03dx%03d_pos0_%03d_%03d_yOff_%03d_pos1_%03d_%03d.png",
+                        _counter,
+                        renderer.getParam(TileRenderer.TR_CURRENT_COLUMN), renderer.getParam(TileRenderer.TR_CURRENT_ROW),
+                        tWidth, tHeight,
+                        pX, tY, tYOff, pX, pY).replace(' ', '_');
+                System.err.println("XXX file "+fname);
+                final File fout = new File(fname);
+                try {
+                    ImageIO.write(dstImage, "png", fout);
+                } catch (IOException e) {
+                    e.printStackTrace();
+                }
+                _counter++;
+            }
+            // Draw resulting image in one shot
+            final BufferedImage outImage = dstImage.getSubimage(0, imgYOff, tWidth, tHeight);
+            final boolean drawDone = g2d.drawImage(outImage, pX, pY, null); // Null ImageObserver since image data is ready.
+            if( verbose ) {
+                final Shape oClip = g2d.getClip();
+                System.err.println("XXX tile-post.X tile 0 / "+imgYOff+" "+tWidth+"x"+tHeight+", clippedImgSize "+cis);
+                System.err.println("XXX tile-post.X pYf "+cis.getHeight()+" - ( "+tY+" - "+tYOff+" + "+tHeight+" ) "+scaledYOffset+" = "+ pY);
+                System.err.println("XXX tile-post.X clip "+oClip+" + "+pX+" / [pY "+tY+", pYOff "+tYOff+", pYf "+pY+"] -> "+g2d.getClip());
+                g2d.setColor(Color.BLACK);
+                g2d.drawRect(pX, pY, tWidth, tHeight);
+                if( null != oClip ) {
+                    final Rectangle r = oClip.getBounds();
+                    g2d.setColor(Color.YELLOW);
+                    g2d.drawRect(r.x, r.y, r.width, r.height);
+                }
+                System.err.println("XXX tile-post.X "+renderer);
+                System.err.println("XXX tile-post.X dst-img "+dstImage.getWidth()+"x"+dstImage.getHeight());
+                System.err.println("XXX tile-post.X out-img "+outImage.getWidth()+"x"+outImage.getHeight());
+                System.err.println("XXX tile-post.X y-flip "+flipVertical+", originBottomLeft "+originBottomLeft+" -> "+pX+"/"+pY+", drawDone "+drawDone);
+            }
+        }
+        @Override
+        public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {}
+    };
+}
diff --git a/src/jogl/classes/jogamp/opengl/awt/AWTUtil.java b/src/jogl/classes/jogamp/opengl/awt/AWTUtil.java
index e15e538c2..dc286ca59 100644
--- a/src/jogl/classes/jogamp/opengl/awt/AWTUtil.java
+++ b/src/jogl/classes/jogamp/opengl/awt/AWTUtil.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,7 +29,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
@@ -85,7 +85,7 @@ public class AWTUtil {
           NativeWindowFactory.getAWTToolkitLock().lock();
         }
       } catch (Exception e) { j2dOk=false; }
-    } 
+    }
     if(!j2dOk) {
       NativeWindowFactory.getAWTToolkitLock().lock();
     }
@@ -108,7 +108,7 @@ public class AWTUtil {
               NativeWindowFactory.getAWTToolkitLock().unlock();
             }
           } catch (Exception e) { j2dOk=false; }
-        } 
+        }
         if(!j2dOk) {
           NativeWindowFactory.getAWTToolkitLock().unlock();
         }
diff --git a/src/jogl/classes/jogamp/opengl/awt/Java2D.java b/src/jogl/classes/jogamp/opengl/awt/Java2D.java
index 3dbfefb19..886cd9368 100644
--- a/src/jogl/classes/jogamp/opengl/awt/Java2D.java
+++ b/src/jogl/classes/jogamp/opengl/awt/Java2D.java
@@ -1,21 +1,21 @@
 /*
  * Copyright (c) 2003-2005 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -28,11 +28,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -69,6 +69,7 @@ public class Java2D {
   private static boolean DEBUG = Debug.debug("Java2D");
   private static boolean isHeadless;
   private static boolean isOGLPipelineActive;
+  private static boolean isOGLPipelineResourceCompatible;
   private static Method invokeWithOGLContextCurrentMethod;
   private static Method isQueueFlusherThreadMethod;
   private static Method getOGLViewportMethod;
@@ -115,6 +116,7 @@ public class Java2D {
 
   static {
     AccessController.doPrivileged(new PrivilegedAction<Object>() {
+        @Override
         public Object run() {
           if (DEBUG) {
             System.err.println("Checking for Java2D/OpenGL support");
@@ -124,18 +126,36 @@ public class Java2D {
             isHeadless = true;
             // Figure out whether the default graphics configuration is an
             // OpenGL graphics configuration
-            GraphicsConfiguration cfg =
-              GraphicsEnvironment.getLocalGraphicsEnvironment().
-              getDefaultScreenDevice().
-              getDefaultConfiguration();
+            final GraphicsConfiguration cfg;
+            final String cfgName;
+            final boolean java2dOGLDisabledByOS = Platform.OS_TYPE == Platform.OSType.MACOS;
+            final boolean java2dOGLDisabledByProp;
+            {
+                boolean enabled = true;
+                final String sVal = System.getProperty("sun.java2d.opengl");
+                if( null != sVal ) {
+                    enabled = Boolean.valueOf(sVal);
+                }
+                java2dOGLDisabledByProp = !enabled;
+            }
+            if( !java2dOGLDisabledByProp && !java2dOGLDisabledByOS ) {
+                cfg = GraphicsEnvironment.getLocalGraphicsEnvironment().
+                        getDefaultScreenDevice().getDefaultConfiguration();
+                cfgName = cfg.getClass().getName();
+            } else {
+                if (DEBUG) {
+                  System.err.println("Java2D support disabled: by Property "+java2dOGLDisabledByProp+", by OS "+java2dOGLDisabledByOS);
+                }
+                cfg = null;
+                cfgName = "nil";
+            }
             // If we get here, we aren't running in headless mode
             isHeadless = false;
-            String name = cfg.getClass().getName();
             if (DEBUG) {
-              System.err.println("Java2D support: default GraphicsConfiguration = " + name);
+              System.err.println("Java2D support: default GraphicsConfiguration = " + cfgName);
             }
-            isOGLPipelineActive = Platform.OS_TYPE != Platform.OSType.MACOS &&
-                                  (name.startsWith("sun.java2d.opengl"));
+            isOGLPipelineActive = cfgName.startsWith("sun.java2d.opengl");
+            isOGLPipelineResourceCompatible = isOGLPipelineActive;
 
             if (isOGLPipelineActive) {
               try {
@@ -152,99 +172,101 @@ public class Java2D {
                                                                      new Class[] {});
                 isQueueFlusherThreadMethod.setAccessible(true);
 
-                getOGLViewportMethod = utils.getDeclaredMethod("getOGLViewport",
-                                                               new Class[] {
-                                                                 Graphics.class,
-                                                                 Integer.TYPE,
-                                                                 Integer.TYPE
-                                                               });
-                getOGLViewportMethod.setAccessible(true);
-
-                getOGLScissorBoxMethod = utils.getDeclaredMethod("getOGLScissorBox",
-                                                                 new Class[] {
-                                                                   Graphics.class
-                                                                 });
-                getOGLScissorBoxMethod.setAccessible(true);
-
-                getOGLSurfaceIdentifierMethod = utils.getDeclaredMethod("getOGLSurfaceIdentifier",
+                if( isOGLPipelineResourceCompatible ) {
+                    getOGLViewportMethod = utils.getDeclaredMethod("getOGLViewport",
+                                                                   new Class[] {
+                                                                     Graphics.class,
+                                                                     Integer.TYPE,
+                                                                     Integer.TYPE
+                                                                   });
+                    getOGLViewportMethod.setAccessible(true);
+
+                    getOGLScissorBoxMethod = utils.getDeclaredMethod("getOGLScissorBox",
+                                                                     new Class[] {
+                                                                       Graphics.class
+                                                                     });
+                    getOGLScissorBoxMethod.setAccessible(true);
+
+                    getOGLSurfaceIdentifierMethod = utils.getDeclaredMethod("getOGLSurfaceIdentifier",
+                                                                            new Class[] {
+                                                                              Graphics.class
+                                                                            });
+                    getOGLSurfaceIdentifierMethod.setAccessible(true);
+
+                    // Try to get additional methods required for proper FBO support
+                    fbObjectSupportInitialized = true;
+                    try {
+                      invokeWithOGLSharedContextCurrentMethod = utils.getDeclaredMethod("invokeWithOGLSharedContextCurrent",
+                                                                                        new Class[] {
+                                                                                          GraphicsConfiguration.class,
+                                                                                          Runnable.class
+                                                                                        });
+                      invokeWithOGLSharedContextCurrentMethod.setAccessible(true);
+
+                      getOGLSurfaceTypeMethod = utils.getDeclaredMethod("getOGLSurfaceType",
                                                                         new Class[] {
                                                                           Graphics.class
                                                                         });
-                getOGLSurfaceIdentifierMethod.setAccessible(true);
-
-                // Try to get additional methods required for proper FBO support
-                fbObjectSupportInitialized = true;
-                try {
-                  invokeWithOGLSharedContextCurrentMethod = utils.getDeclaredMethod("invokeWithOGLSharedContextCurrent",
-                                                                                    new Class[] {
-                                                                                      GraphicsConfiguration.class,
-                                                                                      Runnable.class
-                                                                                    });
-                  invokeWithOGLSharedContextCurrentMethod.setAccessible(true);
-
-                  getOGLSurfaceTypeMethod = utils.getDeclaredMethod("getOGLSurfaceType",
-                                                                    new Class[] {
-                                                                      Graphics.class
-                                                                    });
-                  getOGLSurfaceTypeMethod.setAccessible(true);
-                } catch (Exception e) {
-                  fbObjectSupportInitialized = false;
-                  if (DEBUG) {
-                    e.printStackTrace();
-                    System.err.println("Info: Disabling Java2D/JOGL FBO support");
-                  }
-                }
-
-                // Try to get an additional method for FBO support in recent Mustang builds
-                try {
-                  getOGLTextureTypeMethod = utils.getDeclaredMethod("getOGLTextureType",
-                                                                    new Class[] {
-                                                                      Graphics.class
-                                                                    });
-                  getOGLTextureTypeMethod.setAccessible(true);
-                } catch (Exception e) {
-                  if (DEBUG) {
-                    e.printStackTrace();
-                    System.err.println("Info: GL_ARB_texture_rectangle FBO support disabled");
-                  }
-                }
-
-                // Try to set up APIs for enabling the bridge on OS X,
-                // where it isn't possible to create generalized
-                // external GLDrawables
-                Class<?> cglSurfaceData = null;
-                try {
-                  cglSurfaceData = Class.forName("sun.java2d.opengl.CGLSurfaceData");
-                } catch (Exception e) {
-                  if (DEBUG) {
-                    e.printStackTrace();
-                    System.err.println("Info: Unable to find class sun.java2d.opengl.CGLSurfaceData for OS X");
-                  }
-                }
-                if (cglSurfaceData != null) {
-                  // FIXME: for now, assume that FBO support is not enabled on OS X
-                  fbObjectSupportInitialized = false;
-
-                  // We need to find these methods in order to make the bridge work on OS X
-                  createOGLContextOnSurfaceMethod = cglSurfaceData.getDeclaredMethod("createOGLContextOnSurface",
-                                                                                     new Class[] {
-                                                                                       Graphics.class,
-                                                                                       Long.TYPE
-                                                                                     });
-                  createOGLContextOnSurfaceMethod.setAccessible(true);
-
-                  makeOGLContextCurrentOnSurfaceMethod = cglSurfaceData.getDeclaredMethod("makeOGLContextCurrentOnSurface",
-                                                                                          new Class[] {
-                                                                                            Graphics.class,
-                                                                                            Long.TYPE
-                                                                                          });
-                  makeOGLContextCurrentOnSurfaceMethod.setAccessible(true);
-
-                  destroyOGLContextMethod = cglSurfaceData.getDeclaredMethod("destroyOGLContext",
-                                                                             new Class[] {
-                                                                               Long.TYPE
-                                                                             });
-                  destroyOGLContextMethod.setAccessible(true);
+                      getOGLSurfaceTypeMethod.setAccessible(true);
+                    } catch (Exception e) {
+                      fbObjectSupportInitialized = false;
+                      if (DEBUG) {
+                        e.printStackTrace();
+                        System.err.println("Info: Disabling Java2D/JOGL FBO support");
+                      }
+                    }
+
+                    // Try to get an additional method for FBO support in recent Mustang builds
+                    try {
+                      getOGLTextureTypeMethod = utils.getDeclaredMethod("getOGLTextureType",
+                                                                        new Class[] {
+                                                                          Graphics.class
+                                                                        });
+                      getOGLTextureTypeMethod.setAccessible(true);
+                    } catch (Exception e) {
+                      if (DEBUG) {
+                        e.printStackTrace();
+                        System.err.println("Info: GL_ARB_texture_rectangle FBO support disabled");
+                      }
+                    }
+
+                    // Try to set up APIs for enabling the bridge on OS X,
+                    // where it isn't possible to create generalized
+                    // external GLDrawables
+                    Class<?> cglSurfaceData = null;
+                    try {
+                      cglSurfaceData = Class.forName("sun.java2d.opengl.CGLSurfaceData");
+                    } catch (Exception e) {
+                      if (DEBUG) {
+                        e.printStackTrace();
+                        System.err.println("Info: Unable to find class sun.java2d.opengl.CGLSurfaceData for OS X");
+                      }
+                    }
+                    if (cglSurfaceData != null) {
+                      // FIXME: for now, assume that FBO support is not enabled on OS X
+                      fbObjectSupportInitialized = false;
+
+                      // We need to find these methods in order to make the bridge work on OS X
+                      createOGLContextOnSurfaceMethod = cglSurfaceData.getDeclaredMethod("createOGLContextOnSurface",
+                                                                                         new Class[] {
+                                                                                           Graphics.class,
+                                                                                           Long.TYPE
+                                                                                         });
+                      createOGLContextOnSurfaceMethod.setAccessible(true);
+
+                      makeOGLContextCurrentOnSurfaceMethod = cglSurfaceData.getDeclaredMethod("makeOGLContextCurrentOnSurface",
+                                                                                              new Class[] {
+                                                                                                Graphics.class,
+                                                                                                Long.TYPE
+                                                                                              });
+                      makeOGLContextCurrentOnSurfaceMethod.setAccessible(true);
+
+                      destroyOGLContextMethod = cglSurfaceData.getDeclaredMethod("destroyOGLContext",
+                                                                                 new Class[] {
+                                                                                   Long.TYPE
+                                                                                 });
+                      destroyOGLContextMethod.setAccessible(true);
+                    }
                 }
               } catch (Exception e) {
                 catched = e;
@@ -252,6 +274,7 @@ public class Java2D {
                   System.err.println("Info: Disabling Java2D/JOGL integration");
                 }
                 isOGLPipelineActive = false;
+                isOGLPipelineResourceCompatible = false;
               }
             }
           } catch (HeadlessException e) {
@@ -265,7 +288,7 @@ public class Java2D {
             if(null != catched) {
                 catched.printStackTrace();
             }
-            System.err.println("JOGL/Java2D integration " + (isOGLPipelineActive ? "enabled" : "disabled"));
+            System.err.println("JOGL/Java2D OGL Pipeline active " + isOGLPipelineActive + ", resourceCompatible "+isOGLPipelineResourceCompatible);
           }
           return null;
         }
@@ -276,6 +299,10 @@ public class Java2D {
     return isOGLPipelineActive;
   }
 
+  public static boolean isOGLPipelineResourceCompatible() {
+    return isOGLPipelineResourceCompatible;
+  }
+
   public static boolean isFBOEnabled() {
     return fbObjectSupportInitialized;
   }
@@ -291,7 +318,7 @@ public class Java2D {
       throw (InternalError) new InternalError().initCause(e);
     }
   }
-  
+
   /** Makes current the OpenGL context associated with the passed
       Graphics object and runs the given Runnable on the Queue
       Flushing Thread in one atomic action. */
@@ -330,7 +357,7 @@ public class Java2D {
       false if the passed GraphicsConfiguration was not an OpenGL
       GraphicsConfiguration. */
   public static boolean invokeWithOGLSharedContextCurrent(GraphicsConfiguration g, Runnable r) throws GLException {
-    checkActive();
+    checkCompatible();
 
     try {
       AWTUtil.lockToolkit();
@@ -355,7 +382,7 @@ public class Java2D {
   public static Rectangle getOGLViewport(Graphics g,
                                          int componentWidth,
                                          int componentHeight) {
-    checkActive();
+    checkCompatible();
 
     try {
       return (Rectangle) getOGLViewportMethod.invoke(null, new Object[] {g,
@@ -375,7 +402,7 @@ public class Java2D {
       passed to a call to glScissor(). Should only be called from the
       Queue Flusher Thread. */
   public static Rectangle getOGLScissorBox(Graphics g) {
-    checkActive();
+    checkCompatible();
 
     try {
       return (Rectangle) getOGLScissorBoxMethod.invoke(null, new Object[] {g});
@@ -393,7 +420,7 @@ public class Java2D {
       created (and the old ones destroyed). Should only be called from
       the Queue Flusher Thread.*/
   public static Object getOGLSurfaceIdentifier(Graphics g) {
-    checkActive();
+    checkCompatible();
 
     try {
       return getOGLSurfaceIdentifierMethod.invoke(null, new Object[] {g});
@@ -408,7 +435,7 @@ public class Java2D {
       object. This indicates, in particular, whether Java2D is
       currently rendering into a pbuffer or FBO. */
   public static int getOGLSurfaceType(Graphics g) {
-    checkActive();
+    checkCompatible();
 
     try {
       // FIXME: fallback path for pre-b73 (?) Mustang builds -- remove
@@ -429,7 +456,7 @@ public class Java2D {
       object assuming it is rendering to an FBO. Returns either
       GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE_ARB. */
   public static int getOGLTextureType(Graphics g) {
-    checkActive();
+    checkCompatible();
 
     if (getOGLTextureTypeMethod == null) {
       return GL.GL_TEXTURE_2D;
@@ -483,7 +510,7 @@ public class Java2D {
       associated with the given Graphics object, sharing textures and
       display lists with the specified (CGLContextObj) share context. */
   public static long createOGLContextOnSurface(Graphics g, long shareCtx) {
-    checkActive();
+    checkCompatible();
 
     try {
       return ((Long) createOGLContextOnSurfaceMethod.invoke(null, new Object[] { g, new Long(shareCtx) })).longValue();
@@ -497,7 +524,7 @@ public class Java2D {
   /** (Mac OS X-specific) Makes the given OpenGL context current on
       the surface associated with the given Graphics object. */
   public static boolean makeOGLContextCurrentOnSurface(Graphics g, long ctx) {
-    checkActive();
+    checkCompatible();
 
     try {
       return ((Boolean) makeOGLContextCurrentOnSurfaceMethod.invoke(null, new Object[] { g, new Long(ctx) })).booleanValue();
@@ -510,7 +537,7 @@ public class Java2D {
 
   /** (Mac OS X-specific) Destroys the given OpenGL context. */
   public static void destroyOGLContext(long ctx) {
-    checkActive();
+    checkCompatible();
 
     try {
       destroyOGLContextMethod.invoke(null, new Object[] { new Long(ctx) });
@@ -527,12 +554,19 @@ public class Java2D {
 
   private static void checkActive() {
     if (!isOGLPipelineActive()) {
-      throw new GLException("Java2D OpenGL pipeline not active (or necessary support not present)");
+      throw new GLException("Java2D OpenGL pipeline not active");
+    }
+  }
+
+  private static void checkCompatible() {
+    if ( !isOGLPipelineResourceCompatible() ) {
+      throw new GLException("Java2D OpenGL pipeline not resource compatible");
     }
   }
 
   private static int getOGLUtilitiesIntField(final String name) {
     Integer i = AccessController.doPrivileged(new PrivilegedAction<Integer>() {
+        @Override
         public Integer run() {
           try {
             Class<?> utils = Class.forName("sun.java2d.opengl.OGLUtilities");
@@ -562,7 +596,7 @@ public class Java2D {
     // Note 2: the first execution of this method must not be from the
     // Java2D Queue Flusher Thread.
 
-    if (isOGLPipelineActive() &&
+    if (isOGLPipelineResourceCompatible() &&
         isFBOEnabled() &&
         !initializedJ2DFBOShareContext) {
 
@@ -576,6 +610,7 @@ public class Java2D {
         System.err.println("Starting initialization of J2D FBO share context");
       }
       invokeWithOGLSharedContextCurrent(device.getDefaultConfiguration(), new Runnable() {
+          @Override
           public void run() {
             j2dFBOShareContext = GLDrawableFactory.getFactory(GLProfile.getDefault(GLProfile.getDefaultDevice())).createExternalGLContext();
           }
diff --git a/src/jogl/classes/jogamp/opengl/awt/Java2DGLContext.java b/src/jogl/classes/jogamp/opengl/awt/Java2DGLContext.java
deleted file mode 100644
index 4a5b1db54..000000000
--- a/src/jogl/classes/jogamp/opengl/awt/Java2DGLContext.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.awt;
-
-import jogamp.opengl.*;
-import java.awt.Graphics;
-
-/** Provides a construct by which the shared GLJPanel code can
- * interact with a few methods in the Mac OS X-specific Java2D/JOGL
- * bridge implementation.
- */
-
-public interface Java2DGLContext {
-  public void setGraphics(Graphics g);
-}
diff --git a/src/jogl/classes/jogamp/opengl/awt/VersionApplet.java b/src/jogl/classes/jogamp/opengl/awt/VersionApplet.java
index 55fb3f9a2..9173a38cb 100644
--- a/src/jogl/classes/jogamp/opengl/awt/VersionApplet.java
+++ b/src/jogl/classes/jogamp/opengl/awt/VersionApplet.java
@@ -42,7 +42,7 @@ public class VersionApplet extends Applet {
     va.init();
     frame.add(va, BorderLayout.CENTER);
     frame.validate();
-        
+
     frame.setVisible(true);
     va.start();
   }
@@ -54,6 +54,7 @@ public class VersionApplet extends Applet {
         this.f = f;
         this.va = va;
     }
+    @Override
     public void windowClosing(WindowEvent ev) {
         f.setVisible(false);
         va.stop();
@@ -68,7 +69,7 @@ public class VersionApplet extends Applet {
     if(null != canvas) { return; }
 
     setEnabled(true);
-    
+
     GLProfile glp = GLProfile.getDefault();
     GLCapabilities glcaps = new GLCapabilities(glp);
 
@@ -87,7 +88,7 @@ public class VersionApplet extends Applet {
     /*
     s = NativeWindowVersion.getInstance().toString();
     System.err.println(s);
-    tareaVersion.append(NativeWindowVersion.getInstance().toString()); 
+    tareaVersion.append(NativeWindowVersion.getInstance().toString());
     */
 
     s = JoglVersion.getInstance().toString();
@@ -129,24 +130,28 @@ public class VersionApplet extends Applet {
       }
   }
 
+  @Override
   public void init() {
     System.err.println("VersionApplet: init() - begin");
     my_init();
     System.err.println("VersionApplet: init() - end");
   }
 
+  @Override
   public void start() {
     System.err.println("VersionApplet: start() - begin");
     canvas.setVisible(true);
     System.err.println("VersionApplet: start() - end");
   }
 
+  @Override
   public void stop() {
     System.err.println("VersionApplet: stop() - begin");
     canvas.setVisible(false);
     System.err.println("VersionApplet: stop() - end");
   }
 
+  @Override
   public void destroy() {
     System.err.println("VersionApplet: destroy() - start");
     my_release();
@@ -154,6 +159,7 @@ public class VersionApplet extends Applet {
   }
 
   class GLInfo implements GLEventListener {
+    @Override
     public void init(GLAutoDrawable drawable) {
         GL gl = drawable.getGL();
         String s = JoglVersion.getGLInfo(gl, null).toString();
@@ -161,12 +167,15 @@ public class VersionApplet extends Applet {
         tareaVersion.append(s);
     }
 
+    @Override
     public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
     }
 
+    @Override
     public void display(GLAutoDrawable drawable) {
     }
 
+    @Override
     public void dispose(GLAutoDrawable drawable) {
     }
   }
diff --git a/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java
index cddd142e9..7b85c3e75 100644
--- a/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,12 +20,12 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.egl;
 
 import java.util.*;
@@ -36,8 +36,8 @@ import jogamp.opengl.*;
  * Implementation of the DynamicLookupHelper for Desktop ES2 (AMD, ..)
  * where EGL and ES2 functions reside within the desktop OpenGL library.
  */
-public class DesktopES2DynamicLibraryBundleInfo extends GLDynamicLibraryBundleInfo {
-    static List<String> glueLibNames;
+public final class DesktopES2DynamicLibraryBundleInfo extends GLDynamicLibraryBundleInfo {
+    static final List<String> glueLibNames;
     static {
         glueLibNames = new ArrayList<String>();
         glueLibNames.add("jogl_mobile");
@@ -47,35 +47,29 @@ public class DesktopES2DynamicLibraryBundleInfo extends GLDynamicLibraryBundleIn
         super();
     }
 
-    /** 
-     * Might be a desktop GL library, and might need to allow symbol access to subsequent libs.
-     * 
-     * This respects old DRI requirements:<br>
-     * <pre>
-     * http://dri.sourceforge.net/doc/DRIuserguide.html
-     * </pre>
-     */
-    public boolean shallLinkGlobal() { return true; }
-    
+    @Override
     public final List<String> getToolGetProcAddressFuncNameList() {
         List<String> res = new ArrayList<String>();
         res.add("eglGetProcAddress");
         return res;
     }
 
+    @Override
     public final long toolGetProcAddress(long toolGetProcAddressHandle, String funcName) {
         return EGL.eglGetProcAddress(toolGetProcAddressHandle, funcName);
     }
 
+    @Override
     public final boolean useToolGetProcAdressFirst(String funcName) {
         return true;
     }
-    
-    public List<List<String>> getToolLibNames() {
+
+    @Override
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         final List<String> libsGL = new ArrayList<String>();
-        
-        // Be aware that on DRI systems, eg ATI fglrx, etc, 
+
+        // Be aware that on DRI systems, eg ATI fglrx, etc,
         // you have to set LIBGL_DRIVERS_PATH env variable.
         // Eg on Ubuntu 64bit systems this is:
         //    export LIBGL_DRIVERS_PATH=/usr/lib/fglrx/dri:/usr/lib32/fglrx/dri
@@ -92,15 +86,16 @@ public class DesktopES2DynamicLibraryBundleInfo extends GLDynamicLibraryBundleIn
 
         // OSX (guess ES2 on OSX will never happen)
         libsGL.add("/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib");
-        
+
         // last but not least .. the generic one
         libsGL.add("GL");
-        
+
         libsList.add(libsGL);
         return libsList;
-    }    
-        
+    }
+
+    @Override
     public final List<String> getGlueLibNames() {
         return glueLibNames;
-    }    
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
index f5f9f62c4..f89ded4f6 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2011 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,7 +29,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -42,7 +42,9 @@ import java.util.Map;
 
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
@@ -50,11 +52,12 @@ import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
 
 import com.jogamp.common.nio.Buffers;
-import com.jogamp.common.os.Platform;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+import com.jogamp.opengl.GLRendererQuirks;
 
-public abstract class EGLContext extends GLContextImpl {
+public class EGLContext extends GLContextImpl {
     private boolean eglQueryStringInitialized;
     private boolean eglQueryStringAvailable;
     private EGLExt _eglExt;
@@ -68,14 +71,15 @@ public abstract class EGLContext extends GLContextImpl {
     }
 
     @Override
-    protected void resetStates() {
+    protected void resetStates(boolean isInit) {
         eglQueryStringInitialized = false;
         eglQueryStringAvailable = false;
         eglExtProcAddressTable = null;
         // no inner state _eglExt = null;
-        super.resetStates();
+        super.resetStates(isInit);
     }
-    
+
+    @Override
     public Object getPlatformGLExtensions() {
       return getEGLExt();
     }
@@ -87,6 +91,7 @@ public abstract class EGLContext extends GLContextImpl {
       return _eglExt;
     }
 
+    @Override
     public final ProcAddressTable getPlatformExtProcAddressTable() {
         return eglExtProcAddressTable;
     }
@@ -95,75 +100,80 @@ public abstract class EGLContext extends GLContextImpl {
         return eglExtProcAddressTable;
     }
 
+    @Override
     protected Map<String, String> getFunctionNameMap() { return null; }
 
+    @Override
     protected Map<String, String> getExtensionNameMap() { return null; }
 
+    @Override
     public final boolean isGLReadDrawableAvailable() {
         return true;
     }
 
+    @Override
     protected void makeCurrentImpl() throws GLException {
-        if(EGL.EGL_NO_DISPLAY==((EGLDrawable)drawable).getDisplay() ) {
-            throw new GLException("drawable not properly initialized, NO DISPLAY: "+drawable);
-        }
         if (EGL.eglGetCurrentContext() != contextHandle) {
-            if (!EGL.eglMakeCurrent(((EGLDrawable)drawable).getDisplay(),
-                                    drawable.getHandle(),
-                                    drawableRead.getHandle(),
-                                    contextHandle)) {
-                throw new GLException("Error making context 0x" +
-                                      Long.toHexString(contextHandle) + " current: error code 0x" + Integer.toHexString(EGL.eglGetError()));
+            final long dpy = drawable.getNativeSurface().getDisplayHandle();
+            if (!EGL.eglMakeCurrent(dpy, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+                throw new GLException("Error making context " + toHexString(contextHandle) +
+                                      " current on Thread " + getThreadName() +
+                                      " with display " + toHexString(dpy) +
+                                      ", drawableWrite " + toHexString(drawable.getHandle()) +
+                                      ", drawableRead "+ toHexString(drawableRead.getHandle()) +
+                                      " - Error code " + toHexString(EGL.eglGetError()) + ", " + this);
             }
         }
     }
 
+    @Override
     protected void releaseImpl() throws GLException {
-      if (!EGL.eglMakeCurrent(((EGLDrawable)drawable).getDisplay(),
-                              EGL.EGL_NO_SURFACE,
-                              EGL.EGL_NO_SURFACE,
-                              EGL.EGL_NO_CONTEXT)) {
-            throw new GLException("Error freeing OpenGL context 0x" +
-                                  Long.toHexString(contextHandle) + ": error code 0x" + Integer.toHexString(EGL.eglGetError()));
+      if (!EGL.eglMakeCurrent(drawable.getNativeSurface().getDisplayHandle(), EGL.EGL_NO_SURFACE, EGL.EGL_NO_SURFACE, EGL.EGL_NO_CONTEXT)) {
+            throw new GLException("Error freeing OpenGL context " + toHexString(contextHandle) +
+                                  ": error code " + toHexString(EGL.eglGetError()));
       }
     }
 
+    @Override
     protected void destroyImpl() throws GLException {
-      if (!EGL.eglDestroyContext(((EGLDrawable)drawable).getDisplay(), contextHandle)) {
-          final int eglError = EGL.eglGetError();
-          if(EGL.EGL_SUCCESS != eglError) { /* oops, Mesa EGL impl. may return false, but has no EGL error */
-              throw new GLException("Error destroying OpenGL context 0x" +
-                                    Long.toHexString(contextHandle) + ": error code 0x" + Integer.toHexString(eglError));
-          }
-      }
+        destroyContextARBImpl(contextHandle);
     }
 
+    @Override
     protected long createContextARBImpl(long share, boolean direct, int ctp, int major, int minor) {
         return 0; // FIXME
     }
 
+    @Override
     protected void destroyContextARBImpl(long _context) {
-        // FIXME
+        if (!EGL.eglDestroyContext(drawable.getNativeSurface().getDisplayHandle(), _context)) {
+            final int eglError = EGL.eglGetError();
+            if(EGL.EGL_SUCCESS != eglError) { /* oops, Mesa EGL impl. may return false, but has no EGL error */
+                throw new GLException("Error destroying OpenGL context " + toHexString(_context) +
+                        ": error code " + toHexString(eglError));
+            }
+        }
     }
 
-    protected boolean createImpl(GLContextImpl shareWith) throws GLException {
-        long eglDisplay = ((EGLDrawable)drawable).getDisplay();
-        EGLGraphicsConfiguration config = ((EGLDrawable)drawable).getGraphicsConfiguration();
-        GLProfile glProfile = drawable.getGLProfile();
-        long eglConfig = config.getNativeConfig();
-        long shareWithHandle = EGL.EGL_NO_CONTEXT;
-
-        if (eglDisplay == 0) {
+    @Override
+    protected boolean createImpl(final long shareWithHandle) throws GLException {
+        final EGLGraphicsConfiguration config = (EGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
+        final long eglDisplay = config.getScreen().getDevice().getHandle();
+        final GLProfile glProfile = drawable.getGLProfile();
+        final long eglConfig = config.getNativeConfig();
+        // 0 == EGL.EGL_NO_CONTEXT;
+
+        if ( 0 == eglDisplay ) {
             throw new GLException("Error: attempted to create an OpenGL context without a display connection");
         }
-        if (eglConfig == 0) {
+        if ( 0 == eglConfig ) {
             throw new GLException("Error: attempted to create an OpenGL context without a graphics configuration");
         }
 
         try {
             // might be unavailable on EGL < 1.2
-            if(!EGL.eglBindAPI(EGL.EGL_OPENGL_ES_API)) {
-                throw new GLException("Catched: eglBindAPI to ES failed , error 0x"+Integer.toHexString(EGL.eglGetError()));
+            if( !EGL.eglBindAPI(EGL.EGL_OPENGL_ES_API) ) {
+                throw new GLException("Catched: eglBindAPI to ES failed , error "+toHexString(EGL.eglGetError()));
             }
         } catch (GLException glex) {
             if (DEBUG) {
@@ -171,26 +181,29 @@ public abstract class EGLContext extends GLContextImpl {
             }
         }
 
-        if (shareWith != null) {
-            shareWithHandle = shareWith.getHandle();
-            if (shareWithHandle == 0) {
-                throw new GLException("GLContextShareSet returned an invalid OpenGL context");
-            }
-        }
+        // Cannot check extension 'EGL_KHR_create_context' before having one current!
 
-        final IntBuffer contextAttrsNIO; 
+        final IntBuffer contextAttrsNIO;
+        final int contextVersionReq, contextVersionAttr;
         {
-            final int[] contextAttrs = new int[] {
-                    EGL.EGL_CONTEXT_CLIENT_VERSION, -1,
-                    EGL.EGL_NONE
-            };
-            if (glProfile.usesNativeGLES2()) {
-                contextAttrs[1] = 2;
-            } else if (glProfile.usesNativeGLES1()) {
-                contextAttrs[1] = 1;
+            if ( glProfile.usesNativeGLES3() ) {
+                contextVersionReq = 3;
+                if( GLRendererQuirks.existStickyDeviceQuirk( GLDrawableFactory.getEGLFactory().getDefaultDevice(), GLRendererQuirks.GLES3ViaEGLES2Config) ) {
+                    contextVersionAttr = 2;
+                } else {
+                    contextVersionAttr = 3;
+                }
+            } else if ( glProfile.usesNativeGLES2() ) {
+                contextVersionReq = 2;
+                contextVersionAttr = 2;
+            } else if ( glProfile.usesNativeGLES1() ) {
+                contextVersionReq = 1;
+                contextVersionAttr = 1;
             } else {
                 throw new GLException("Error creating OpenGL context - invalid GLProfile: "+glProfile);
             }
+            // EGLExt.EGL_CONTEXT_MAJOR_VERSION_KHR == EGL.EGL_CONTEXT_CLIENT_VERSION
+            final int[] contextAttrs = new int[] { EGL.EGL_CONTEXT_CLIENT_VERSION, contextVersionAttr, EGL.EGL_NONE };
             contextAttrsNIO = Buffers.newDirectIntBuffer(contextAttrs);
         }
         contextHandle = EGL.eglCreateContext(eglDisplay, eglConfig, shareWithHandle, contextAttrsNIO);
@@ -200,31 +213,32 @@ public abstract class EGLContext extends GLContextImpl {
         }
         if (DEBUG) {
             System.err.println(getThreadName() + ": Created OpenGL context 0x" +
-                               Long.toHexString(contextHandle) + 
+                               Long.toHexString(contextHandle) +
                                ",\n\twrite surface 0x" + Long.toHexString(drawable.getHandle()) +
                                ",\n\tread  surface 0x" + Long.toHexString(drawableRead.getHandle())+
                                ",\n\t"+this+
                                ",\n\tsharing with 0x" + Long.toHexString(shareWithHandle));
         }
-        if (!EGL.eglMakeCurrent(((EGLDrawable)drawable).getDisplay(),
-                                drawable.getHandle(),
-                                drawableRead.getHandle(),
-                                contextHandle)) {
-            throw new GLException("Error making context 0x" +
-                                  Long.toHexString(contextHandle) + " current: error code " + EGL.eglGetError());
+        if (!EGL.eglMakeCurrent(eglDisplay, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+            throw new GLException("Error making context " +
+                                  toHexString(contextHandle) + " current: error code " + toHexString(EGL.eglGetError()));
         }
-        int ctp = CTX_PROFILE_ES;
-        int major;
-        if(glProfile.usesNativeGLES2()) {
-            ctp |= CTX_IMPL_ES2_COMPAT;
-            major = 2;
-        } else {            
-            major = 1;
+        if( !setGLFunctionAvailability(true, contextVersionReq, 0, CTX_PROFILE_ES,
+                                       true /* strictMatch */, // always req. strict match
+                                       false /* withinGLVersionsMapping */) ) {
+            if(DEBUG) {
+                System.err.println(getThreadName() + ": createImpl: setGLFunctionAvailability FAILED delete "+toHexString(contextHandle));
+            }
+            EGL.eglMakeCurrent(drawable.getNativeSurface().getDisplayHandle(), EGL.EGL_NO_SURFACE, EGL.EGL_NO_SURFACE, EGL.EGL_NO_CONTEXT);
+            EGL.eglDestroyContext(drawable.getNativeSurface().getDisplayHandle(), contextHandle);
+            contextHandle = 0;
+            return false;
+        } else {
+            return true;
         }
-        setGLFunctionAvailability(true, major, 0, ctp);
-        return true;
     }
 
+    @Override
     protected final void updateGLXProcAddressTable() {
         final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
         final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
@@ -255,17 +269,16 @@ public abstract class EGLContext extends GLContextImpl {
             }
         }
     }
-  
+
+    @Override
     protected final StringBuilder getPlatformExtensionsStringImpl() {
-        StringBuilder sb = new StringBuilder();        
+        StringBuilder sb = new StringBuilder();
         if (!eglQueryStringInitialized) {
-          eglQueryStringAvailable =
-            getDrawableImpl().getGLDynamicLookupHelper().dynamicLookupFunction("eglQueryString") != 0;
+          eglQueryStringAvailable = getDrawableImpl().getGLDynamicLookupHelper().isFunctionAvailable("eglQueryString");
           eglQueryStringInitialized = true;
         }
         if (eglQueryStringAvailable) {
-            final String ret = EGL.eglQueryString(((EGLDrawable)drawable).getDisplay(), 
-                                                  EGL.EGL_EXTENSIONS);
+            final String ret = EGL.eglQueryString(drawable.getNativeSurface().getDisplayHandle(), EGL.EGL_EXTENSIONS);
             if (DEBUG) {
               System.err.println("EGL extensions: " + ret);
             }
@@ -276,22 +289,63 @@ public abstract class EGLContext extends GLContextImpl {
 
     @Override
     protected boolean setSwapIntervalImpl(int interval) {
-        // FIXME !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-        // eglSwapInterval(..) issued:
-        //   Android 4.0.3 / Pandaboard ES / PowerVR SGX 540: crashes
-        // FIXME !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
-        if( Platform.OSType.ANDROID == Platform.getOSType() && getGLRendererString(true).contains("powervr") ) {
-            if(DEBUG) {
-                System.err.println("Ignored: eglSwapInterval("+interval+") - cause: OS "+Platform.getOSType() + " / Renderer " + getGLRendererString(false));
-            }
+        if( hasRendererQuirk(GLRendererQuirks.NoSetSwapInterval) ) {
             return false;
         }
-        return EGL.eglSwapInterval(((EGLDrawable)drawable).getDisplay(), interval);
+        return EGL.eglSwapInterval(drawable.getNativeSurface().getDisplayHandle(), interval);
     }
 
-    public abstract void bindPbufferToTexture();
+    //
+    // Accessible ..
+    //
 
-    public abstract void releasePbufferFromTexture();
+    /* pp */ void mapCurrentAvailableGLVersion(AbstractGraphicsDevice device) {
+        mapStaticGLVersion(device, ctxVersion.getMajor(), ctxVersion.getMinor(), ctxOptions);
+    }
+    /* pp */ int getContextOptions() { return ctxOptions; }
+    /* pp */ static void mapStaticGLESVersion(AbstractGraphicsDevice device, GLCapabilitiesImmutable caps) {
+        final GLProfile glp = caps.getGLProfile();
+        final int[] reqMajorCTP = new int[2];
+        GLContext.getRequestMajorAndCompat(glp, reqMajorCTP);
+        if( glp.isGLES() ) {
+            if( reqMajorCTP[0] >= 3 ) {
+                reqMajorCTP[1] |= GLContext.CTX_IMPL_ES3_COMPAT | GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ;
+            } else if( reqMajorCTP[0] >= 2 ) {
+                reqMajorCTP[1] |= GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ;
+            }
+        }
+        if( !caps.getHardwareAccelerated() ) {
+            reqMajorCTP[1] |= GLContext.CTX_IMPL_ACCEL_SOFT;
+        }
+        mapStaticGLVersion(device, reqMajorCTP[0], 0, reqMajorCTP[1]);
+    }
+    /* pp */ static void mapStaticGLVersion(AbstractGraphicsDevice device, int major, int minor, int ctp) {
+        if( 0 != ( ctp & GLContext.CTX_PROFILE_ES) ) {
+            // ES1, ES2, ES3, ..
+            mapStaticGLVersion(device, major /* reqMajor */, major, minor, ctp);
+            if( 3 == major ) {
+                // map ES2 -> ES3
+                mapStaticGLVersion(device, 2 /* reqMajor */, major, minor, ctp);
+            }
+        }
+    }
+    private static void mapStaticGLVersion(AbstractGraphicsDevice device, int reqMajor, int major, int minor, int ctp) {
+        GLContext.mapAvailableGLVersion(device, reqMajor, GLContext.CTX_PROFILE_ES, major, minor, ctp);
+        if(! ( device instanceof EGLGraphicsDevice ) ) {
+            final EGLGraphicsDevice eglDevice = new EGLGraphicsDevice(device.getHandle(), EGL.EGL_NO_DISPLAY, device.getConnection(), device.getUnitID(), null);
+            GLContext.mapAvailableGLVersion(eglDevice, reqMajor, GLContext.CTX_PROFILE_ES, major, minor, ctp);
+        }
+    }
+    protected static String getGLVersion(int major, int minor, int ctp, String gl_version) {
+        return GLContext.getGLVersion(major, minor, ctp, gl_version);
+    }
+
+    protected static boolean getAvailableGLVersionsSet(AbstractGraphicsDevice device) {
+        return GLContext.getAvailableGLVersionsSet(device);
+    }
+    protected static void setAvailableGLVersionsSet(AbstractGraphicsDevice device) {
+        GLContext.setAvailableGLVersionsSet(device);
+    }
 
     protected static String toHexString(int hex) {
         return GLContext.toHexString(hex);
@@ -299,25 +353,23 @@ public abstract class EGLContext extends GLContextImpl {
     protected static String toHexString(long hex) {
         return GLContext.toHexString(hex);
     }
-    
+
     //----------------------------------------------------------------------
     // Currently unimplemented stuff
     //
 
+    @Override
     protected void copyImpl(GLContext source, int mask) throws GLException {
         throw new GLException("Not yet implemented");
     }
 
-
-    public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
-        throw new GLException("Should not call this");
-    }
-
-    public boolean offscreenImageNeedsVerticalFlip() {
+    @Override
+    public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {
         throw new GLException("Should not call this");
     }
 
-    public int getOffscreenContextPixelDataType() {
+    @Override
+    public final void glFreeMemoryNV(ByteBuffer pointer) {
         throw new GLException("Should not call this");
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java b/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
index e09400c09..c5f76f667 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -29,105 +29,310 @@
 package jogamp.opengl.egl;
 
 import java.nio.IntBuffer;
+import java.util.Iterator;
 
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
+import javax.media.nativewindow.ToolkitLock;
+import javax.media.opengl.GLException;
 
 import jogamp.opengl.Debug;
 
-import com.jogamp.common.util.LongIntHashMap;
+import com.jogamp.common.util.LongObjectHashMap;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
 
-/** 
- * This implementation provides recursive calls to  
+/**
+ * This implementation provides recursive calls to
  * {@link EGL#eglInitialize(long, IntBuffer, IntBuffer)} and {@link EGL#eglTerminate(long)},
  * where <code>eglInitialize(..)</code> is issued only for the 1st call per <code>eglDisplay</code>
  * and <code>eglTerminate(..)</code> is issued only for the last call.
  * <p>
  * This class is required, due to implementation bugs within EGL where {@link EGL#eglTerminate(long)}
- * does not mark the resource for deletion when still in use, bug releases them immediatly.
+ * does not mark the resource for deletion when still in use, bug releases them immediately.
  * </p>
  */
 public class EGLDisplayUtil {
-    protected static final boolean DEBUG = Debug.debug("EGL");
-    
-    static LongIntHashMap eglDisplayCounter;
-    
+    private static final boolean DEBUG = Debug.debug("EGLDisplayUtil");
+    private static boolean useSingletonEGLDisplay = false;
+    private static EGLDisplayRef singletonEGLDisplay = null;
+
+    private static class EGLDisplayRef {
+        final long eglDisplay;
+        final Throwable createdStack;
+        int initRefCount;
+
+        /**
+         * Returns an already opened {@link EGLDisplayRef} or opens a new {@link EGLDisplayRef}.
+         * <p>
+         * Opened {@link EGLDisplayRef}s are mapped against their <code>eglDisplay</code> handle.
+         * </p>
+         * <p>
+         * Method utilizes {@link EGLDisplayRef}'s reference counter, i.e. increases it.
+         * </p>
+         * <p>
+         * An {@link EGLDisplayRef} is <i>opened</i> via {@link EGL#eglInitialize(long, IntBuffer, IntBuffer)}.
+         * </p>
+         */
+        static EGLDisplayRef getOrCreateOpened(final long eglDisplay, final IntBuffer major, final IntBuffer minor) {
+            EGLDisplayRef o = (EGLDisplayRef) openEGLDisplays.get(eglDisplay);
+            if( null == o ) {
+                if( EGL.eglInitialize(eglDisplay, major, minor) ) {
+                    final EGLDisplayRef n = new EGLDisplayRef(eglDisplay);
+                    openEGLDisplays.put(eglDisplay, n);
+                    n.initRefCount++;
+                    if( null == singletonEGLDisplay ) {
+                        singletonEGLDisplay = n;
+                    }
+                    return n;
+                } else {
+                    return null;
+                }
+            } else {
+                o.initRefCount++;
+                return o;
+            }
+        }
+
+        /**
+         * Closes an already opened {@link EGLDisplayRef}.
+         * <p>
+         * Method decreases a reference counter and closes the {@link EGLDisplayRef} if it reaches zero.
+         * </p>
+         * <p>
+         * An {@link EGLDisplayRef} is <i>closed</i> via {@link EGL#eglTerminate(long)}.
+         * </p>
+         */
+        static EGLDisplayRef closeOpened(final long eglDisplay, final boolean[] res) {
+            final EGLDisplayRef o = (EGLDisplayRef) openEGLDisplays.get(eglDisplay);
+            res[0] = true;
+            if( null != o ) {
+                if( 0 < o.initRefCount ) { // no negative refCount
+                    o.initRefCount--;
+                    if( 0 == o.initRefCount ) {
+                        res[0] = EGL.eglTerminate(eglDisplay);
+                        if( o == singletonEGLDisplay ) {
+                            singletonEGLDisplay = null;
+                        }
+                    }
+                }
+                if( 0 >= o.initRefCount ) {
+                    openEGLDisplays.remove(eglDisplay);
+                }
+            }
+            return o;
+        }
+
+        private EGLDisplayRef(long eglDisplay) {
+            this.eglDisplay = eglDisplay;
+            this.initRefCount = 0;
+            this.createdStack = DEBUG ? new Throwable() : null;
+        }
+
+        @Override
+        public String toString() {
+            return "EGLDisplayRef[0x"+Long.toHexString(eglDisplay)+": refCnt "+initRefCount+"]";
+        }
+    }
+    private static final LongObjectHashMap openEGLDisplays;
+
     static {
-        eglDisplayCounter = new LongIntHashMap();
-        eglDisplayCounter.setKeyNotFoundValue(0);
+        openEGLDisplays = new LongObjectHashMap();
+        openEGLDisplays.setKeyNotFoundValue(null);
+    }
+
+    /**
+     * @return number of unclosed EGL Displays.<br>
+     */
+    public static int shutdown(boolean verbose) {
+        if(DEBUG || verbose || openEGLDisplays.size() > 0 ) {
+            System.err.println("EGLDisplayUtil.EGLDisplays: Shutdown (open: "+openEGLDisplays.size()+")");
+            if(DEBUG) {
+                Thread.dumpStack();
+            }
+            if( openEGLDisplays.size() > 0) {
+                dumpOpenDisplayConnections();
+            }
+        }
+        return openEGLDisplays.size();
+    }
+
+    public static void dumpOpenDisplayConnections() {
+        System.err.println("EGLDisplayUtil: Open EGL Display Connections: "+openEGLDisplays.size());
+        int i=0;
+        for(Iterator<LongObjectHashMap.Entry> iter = openEGLDisplays.iterator(); iter.hasNext(); i++) {
+            final LongObjectHashMap.Entry e = iter.next();
+            final EGLDisplayRef v = (EGLDisplayRef) e.value;
+            System.err.println("EGLDisplayUtil: Open["+i+"]: 0x"+Long.toHexString(e.key)+": "+v);
+            if(null != v.createdStack) {
+                v.createdStack.printStackTrace();
+            }
+        }
     }
 
-    public static long eglGetDisplay(long nativeDisplay_id)  {
+    /* pp */ static synchronized void setSingletonEGLDisplayOnly(boolean v) { useSingletonEGLDisplay = v; }
+
+    private static synchronized long eglGetDisplay(long nativeDisplay_id)  {
+        if( useSingletonEGLDisplay && null != singletonEGLDisplay ) {
+            if(DEBUG) {
+                System.err.println("EGLDisplayUtil.eglGetDisplay.s: eglDisplay("+EGLContext.toHexString(nativeDisplay_id)+"): "+
+                                   EGLContext.toHexString(singletonEGLDisplay.eglDisplay)+
+                                   ", "+((EGL.EGL_NO_DISPLAY != singletonEGLDisplay.eglDisplay)?"OK":"Failed")+", singletonEGLDisplay "+singletonEGLDisplay+" (use "+useSingletonEGLDisplay+")");
+            }
+            return singletonEGLDisplay.eglDisplay;
+        }
         final long eglDisplay = EGL.eglGetDisplay(nativeDisplay_id);
         if(DEBUG) {
-            System.err.println("EGLDisplayUtil.eglGetDisplay(): eglDisplay("+EGLContext.toHexString(nativeDisplay_id)+"): "+
+            System.err.println("EGLDisplayUtil.eglGetDisplay.X: eglDisplay("+EGLContext.toHexString(nativeDisplay_id)+"): "+
                                EGLContext.toHexString(eglDisplay)+
-                               ", "+((EGL.EGL_NO_DISPLAY != eglDisplay)?"OK":"Failed"));
+                               ", "+((EGL.EGL_NO_DISPLAY != eglDisplay)?"OK":"Failed")+", singletonEGLDisplay "+singletonEGLDisplay+" (use "+useSingletonEGLDisplay+")");
         }
         return eglDisplay;
     }
-    
-    public static long eglGetDisplay(NativeSurface surface, boolean allowFallBackToDefault)  {
-        final long nDisplay;
-        if( NativeWindowFactory.TYPE_WINDOWS.equals(NativeWindowFactory.getNativeWindowType(false)) ) {
-            nDisplay = surface.getSurfaceHandle(); // don't even ask ..
-        } else {
-            nDisplay = surface.getDisplayHandle(); // 0 == EGL.EGL_DEFAULT_DISPLAY
+
+    /**
+     * @param eglDisplay
+     * @param major
+     * @param minor
+     * @return true if the eglDisplay is valid and it's reference counter becomes one and {@link EGL#eglInitialize(long, IntBuffer, IntBuffer)} was successful, otherwise false
+     *
+     * @see EGL#eglInitialize(long, IntBuffer, IntBuffer)
+     */
+    private static synchronized boolean eglInitialize(long eglDisplay, IntBuffer major, IntBuffer minor)  {
+        if( EGL.EGL_NO_DISPLAY == eglDisplay) {
+            return false;
+        }
+        final EGLDisplayRef d = EGLDisplayRef.getOrCreateOpened(eglDisplay, major, minor);
+        if(DEBUG) {
+            System.err.println("EGLDisplayUtil.eglInitialize("+EGLContext.toHexString(eglDisplay)+" ...): "+d+" = "+(null != d)+", singletonEGLDisplay "+singletonEGLDisplay+" (use "+useSingletonEGLDisplay+")");
+            // Thread.dumpStack();
+        }
+        return null != d;
+    }
+
+    /**
+     * @param nativeDisplayID
+     * @param eglDisplay array of size 1 holding return value if successful, otherwise {@link EGL#EGL_NO_DISPLAY}.
+     * @param eglErr array of size 1 holding the EGL error value as retrieved by {@link EGL#eglGetError()} if not successful.
+     * @param major
+     * @param minor
+     * @return {@link EGL#EGL_SUCCESS} if successful, otherwise {@link EGL#EGL_BAD_DISPLAY} if {@link #eglGetDisplay(long)} failed
+     *         or {@link EGL#EGL_NOT_INITIALIZED} if {@link #eglInitialize(long, IntBuffer, IntBuffer)} failed.
+     *
+     * @see #eglGetDisplay(long)
+     * @see #eglInitialize(long, IntBuffer, IntBuffer)
+     */
+    private static synchronized int eglGetDisplayAndInitialize(long nativeDisplayID, long[] eglDisplay, int[] eglErr, IntBuffer major, IntBuffer minor) {
+        eglDisplay[0] = EGL.EGL_NO_DISPLAY;
+        final long _eglDisplay = eglGetDisplay( nativeDisplayID );
+        if ( EGL.EGL_NO_DISPLAY == _eglDisplay ) {
+            eglErr[0] = EGL.eglGetError();
+            return EGL.EGL_BAD_DISPLAY;
         }
-        long eglDisplay = EGLDisplayUtil.eglGetDisplay(nDisplay);
-        if (eglDisplay == EGL.EGL_NO_DISPLAY && nDisplay != EGL.EGL_DEFAULT_DISPLAY && allowFallBackToDefault) {
+        if ( !eglInitialize( _eglDisplay, major, minor) ) {
+            eglErr[0] = EGL.eglGetError();
+            return EGL.EGL_NOT_INITIALIZED;
+        }
+        eglDisplay[0] = _eglDisplay;
+        return EGL.EGL_SUCCESS;
+    }
+
+    /**
+     * Attempts to {@link #eglGetDisplayAndInitialize(long, long[], int[], IntBuffer, IntBuffer)} with given <code>nativeDisplayID</code>.
+     * If this fails, method retries with <code>nativeDisplayID</code> {@link EGL#EGL_DEFAULT_DISPLAY} - the fallback mechanism.
+     * The actual used <code>nativeDisplayID</code> is returned in it's in/out array.
+     *
+     * @throws GLException if {@link EGL#eglGetDisplay(long)} or {@link EGL#eglInitialize(long, int[], int, int[], int)} fails incl fallback
+     * @param nativeDisplayID in/out array of size 1, passing the requested nativeVisualID, may return a different revised nativeVisualID handle
+     * @return the initialized EGL display ID
+     * @throws GLException if not successful
+     */
+    private static synchronized long eglGetDisplayAndInitialize(long[] nativeDisplayID) {
+        final long[] eglDisplay = new long[1];
+        final int[] eglError = new int[1];
+        int eglRes = EGLDisplayUtil.eglGetDisplayAndInitialize(nativeDisplayID[0], eglDisplay, eglError, null, null);
+        if( EGL.EGL_SUCCESS == eglRes ) {
+            return eglDisplay[0];
+        }
+        if( EGL.EGL_DEFAULT_DISPLAY != nativeDisplayID[0] ) { // fallback to DEGAULT_DISPLAY
             if(DEBUG) {
-                System.err.println("EGLDisplayUtil.eglGetDisplay(): Fall back to EGL_DEFAULT_DISPLAY");
+                System.err.println("EGLDisplayUtil.eglGetAndInitDisplay failed with native "+EGLContext.toHexString(nativeDisplayID[0])+", error "+EGLContext.toHexString(eglRes)+"/"+EGLContext.toHexString(eglError[0])+" - fallback!");
+            }
+            eglRes = EGLDisplayUtil.eglGetDisplayAndInitialize(EGL.EGL_DEFAULT_DISPLAY, eglDisplay, eglError, null, null);
+            if( EGL.EGL_SUCCESS == eglRes ) {
+                nativeDisplayID[0] = EGL.EGL_DEFAULT_DISPLAY;
+                return eglDisplay[0];
             }
-            eglDisplay = EGLDisplayUtil.eglGetDisplay(EGL.EGL_DEFAULT_DISPLAY);
         }
-        return eglDisplay;
+        throw new GLException("Failed to created/initialize EGL display incl. fallback default: native "+EGLContext.toHexString(nativeDisplayID[0])+", error "+EGLContext.toHexString(eglRes)+"/"+EGLContext.toHexString(eglError[0]));
     }
-    
-    public static synchronized boolean eglInitialize(long eglDisplay, int[] major, int major_offset, int[] minor, int minor_offset)  {
-        final boolean res;    
-        final int refCnt = eglDisplayCounter.get(eglDisplay) + 1; // 0 + 1 = 1 -> 1st init
-        if(1==refCnt) {
-            res = EGL.eglInitialize(eglDisplay, major, major_offset, minor, minor_offset);
-        } else {
-            res = true;
+
+    /**
+     * @param eglDisplay the EGL display handle
+     * @return true if the eglDisplay is valid and it's reference counter becomes zero and {@link EGL#eglTerminate(long)} was successful, otherwise false
+     */
+    private static synchronized boolean eglTerminate(long eglDisplay)  {
+        if( EGL.EGL_NO_DISPLAY == eglDisplay) {
+            return false;
         }
-        eglDisplayCounter.put(eglDisplay, refCnt);
+        final boolean[] res = new boolean[1];
+        final EGLDisplayRef d = EGLDisplayRef.closeOpened(eglDisplay, res);
         if(DEBUG) {
-            System.err.println("EGL.eglInitialize(0x"+Long.toHexString(eglDisplay)+" ...): #"+refCnt+" = "+res);
+            System.err.println("EGLDisplayUtil.eglTerminate.X("+EGLContext.toHexString(eglDisplay)+" ...): "+d+" = "+res[0]+", singletonEGLDisplay "+singletonEGLDisplay+" (use "+useSingletonEGLDisplay+")");
+            // Thread.dumpStack();
         }
-        return res;
+        return res[0];
     }
-    
-    public static synchronized boolean eglInitialize(long eglDisplay, IntBuffer major, IntBuffer minor)  {    
-        final boolean res;    
-        final int refCnt = eglDisplayCounter.get(eglDisplay) + 1; // 0 + 1 = 1 -> 1st init
-        if(1==refCnt) { // only initialize once
-            res = EGL.eglInitialize(eglDisplay, major, minor);
-        } else {
-            res = true;
+
+    private static final EGLGraphicsDevice.EGLDisplayLifecycleCallback eglLifecycleCallback = new EGLGraphicsDevice.EGLDisplayLifecycleCallback() {
+        @Override
+        public long eglGetAndInitDisplay(long[] nativeDisplayID) {
+            return eglGetDisplayAndInitialize(nativeDisplayID);
         }
-        eglDisplayCounter.put(eglDisplay, refCnt);
-        if(DEBUG) {
-            System.err.println("EGL.eglInitialize(0x"+Long.toHexString(eglDisplay)+" ...): #"+refCnt+" = "+res);
+        @Override
+        public void eglTerminate(long eglDisplayHandle) {
+            EGLDisplayUtil.eglTerminate(eglDisplayHandle);
         }
-        return res;
+    };
+
+    /**
+     * Returns an uninitialized {@link EGLGraphicsDevice}. User needs to issue {@link EGLGraphicsDevice#open()} before usage.
+     * <p>
+     * Using {@link #eglGetDisplayAndInitialize(long[])} for the {@link EGLGraphicsDevice#open()} implementation
+     * and {@link #eglTerminate(long)} for {@link EGLGraphicsDevice#close()}.
+     * </p>
+     * <p>
+     * Using the default {@link ToolkitLock}, via {@link NativeWindowFactory#getDefaultToolkitLock(String, long)}.
+     * </p>
+     * @param nativeDisplayID
+     * @param connection
+     * @param unitID
+     * @return an uninitialized {@link EGLGraphicsDevice}
+     */
+    public static EGLGraphicsDevice eglCreateEGLGraphicsDevice(long nativeDisplayID, String connection, int unitID)  {
+        return new EGLGraphicsDevice(nativeDisplayID, EGL.EGL_NO_DISPLAY, connection, unitID, eglLifecycleCallback);
     }
-    
-    public static synchronized boolean eglTerminate(long eglDisplay)  {
-        final boolean res;    
-        final int refCnt = eglDisplayCounter.get(eglDisplay) - 1; // 1 - 1 = 0 -> final terminate
-        if(0==refCnt) { // no terminate if still in use or already terminated
-            res = EGL.eglTerminate(eglDisplay);
+
+    /**
+     * Returns an uninitialized {@link EGLGraphicsDevice}. User needs to issue {@link EGLGraphicsDevice#open()} before usage.
+     * <p>
+     * Using {@link #eglGetDisplayAndInitialize(long[])} for the {@link EGLGraphicsDevice#open()} implementation
+     * and {@link #eglTerminate(long)} for {@link EGLGraphicsDevice#close()}.
+     * </p>
+     * <p>
+     * Using the default {@link ToolkitLock}, via {@link NativeWindowFactory#getDefaultToolkitLock(String, long)}.
+     * </p>
+     * @param surface
+     * @return an uninitialized EGLGraphicsDevice
+     */
+    public static EGLGraphicsDevice eglCreateEGLGraphicsDevice(NativeSurface surface)  {
+        final long nativeDisplayID;
+        if( NativeWindowFactory.TYPE_WINDOWS == NativeWindowFactory.getNativeWindowType(false) ) {
+            nativeDisplayID = surface.getSurfaceHandle(); // don't even ask ..
         } else {
-            res = true;
-        }
-        if(0<=refCnt) { // no negative refCount
-            eglDisplayCounter.put(eglDisplay, refCnt);
-        }
-        if(DEBUG) {
-            System.err.println("EGL.eglTerminate(0x"+Long.toHexString(eglDisplay)+" ...): #"+refCnt+" = "+res);
+            nativeDisplayID = surface.getDisplayHandle(); // 0 == EGL.EGL_DEFAULT_DISPLAY
         }
-        return res;
+        final AbstractGraphicsDevice adevice = surface.getGraphicsConfiguration().getScreen().getDevice();
+        return new EGLGraphicsDevice(nativeDisplayID, EGL.EGL_NO_DISPLAY, adevice.getConnection(), adevice.getUnitID(), eglLifecycleCallback);
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java b/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java
index b2119d728..f184edae3 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,229 +29,146 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.egl;
 
-import jogamp.opengl.GLDynamicLookupHelper;
-import jogamp.opengl.GLDrawableImpl;
+import java.nio.IntBuffer;
 
-import javax.media.nativewindow.*;
-import javax.media.nativewindow.VisualIDHolder.VIDType;
-import javax.media.opengl.*;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindow;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLException;
+
+import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLDynamicLookupHelper;
 
-import com.jogamp.nativewindow.egl.*;
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
 
 public abstract class EGLDrawable extends GLDrawableImpl {
-    protected boolean ownEGLDisplay = false; // for destruction
-    protected boolean ownEGLSurface = false; // for destruction
-    private EGLGraphicsConfiguration eglConfig;
-    protected long eglDisplay;
-    protected long eglSurface;
 
-    protected EGLDrawable(EGLDrawableFactory factory,
-                       NativeSurface component) throws GLException {
+    protected EGLDrawable(EGLDrawableFactory factory, NativeSurface component) throws GLException {
         super(factory, component, false);
-        eglSurface=EGL.EGL_NO_SURFACE;
-        eglDisplay=0;
-    }
-
-    public long getDisplay() {
-        return eglDisplay;
-    }
-
-    public long getHandle() {
-        return eglSurface;
-    }
-
-    public EGLGraphicsConfiguration getGraphicsConfiguration() {
-        return eglConfig;
-    }
-
-    public GLCapabilitiesImmutable getChosenGLCapabilities() {
-        return (null==eglConfig)?super.getChosenGLCapabilities():(GLCapabilitiesImmutable)eglConfig.getChosenCapabilities();
     }
 
+    @Override
     public abstract GLContext createContext(GLContext shareWith);
 
-    protected abstract long createSurface(long eglDpy, long eglNativeCfg, long surfaceHandle);
+    protected abstract long createSurface(EGLGraphicsConfiguration config, int width, int height, long nativeSurfaceHandle);
 
-    private void recreateSurface() {
-        // create a new EGLSurface ..
-        if(EGL.EGL_NO_SURFACE!=eglSurface) {
-            EGL.eglDestroySurface(eglDisplay, eglSurface);
-        }
+    private final long createEGLSurface() {
+        final EGLWrappedSurface eglws = (EGLWrappedSurface) surface;
+        final EGLGraphicsConfiguration eglConfig = (EGLGraphicsConfiguration) eglws.getGraphicsConfiguration();
+        final NativeSurface upstreamSurface = eglws.getUpstreamSurface();
 
-        if(DEBUG) {
-            System.err.println(getThreadName() + ": createSurface using eglDisplay "+toHexString(eglDisplay)+", "+eglConfig);
-        }
+        long eglSurface = createSurface(eglConfig, eglws.getWidth(), eglws.getHeight(), upstreamSurface.getSurfaceHandle());
 
-        eglSurface = createSurface(eglDisplay, eglConfig.getNativeConfig(), surface.getSurfaceHandle());
-        int eglError0 = EGL.EGL_SUCCESS; 
+        int eglError0;
         if (EGL.EGL_NO_SURFACE == eglSurface) {
             eglError0 = EGL.eglGetError();
             if(EGL.EGL_BAD_NATIVE_WINDOW == eglError0) {
-                // Try window handle if available and differs (Windows HDC / HWND). 
+                // Try window handle if available and differs (Windows HDC / HWND).
                 // ANGLE impl. required HWND on Windows.
-                if(surface instanceof NativeWindow) {
-                    final NativeWindow nw = (NativeWindow) surface;
+                if(upstreamSurface instanceof NativeWindow) {
+                    final NativeWindow nw = (NativeWindow) upstreamSurface;
                     if(nw.getWindowHandle() != nw.getSurfaceHandle()) {
                         if(DEBUG) {
                             System.err.println(getThreadName() + ": Info: Creation of window surface w/ surface handle failed: "+eglConfig+", error "+toHexString(eglError0)+", retry w/ windowHandle");
                         }
-                        eglSurface = createSurface(eglDisplay, eglConfig.getNativeConfig(), nw.getWindowHandle());
+                        eglSurface = createSurface(eglConfig, eglws.getWidth(), eglws.getHeight(), nw.getWindowHandle());
                         if (EGL.EGL_NO_SURFACE == eglSurface) {
                             eglError0 = EGL.eglGetError();
                         }
                     }
                 }
             }
+        } else {
+            eglError0 = EGL.EGL_SUCCESS;
         }
         if (EGL.EGL_NO_SURFACE == eglSurface) {
             throw new GLException("Creation of window surface failed: "+eglConfig+", "+surface+", error "+toHexString(eglError0));
         }
-
         if(DEBUG) {
-            System.err.println(getThreadName() + ": setSurface using component: handle "+toHexString(surface.getSurfaceHandle())+" -> "+toHexString(eglSurface));
+            System.err.println(getThreadName() + ": createEGLSurface handle "+toHexString(eglSurface));
         }
+        return eglSurface;
     }
 
     @Override
-    protected final void updateHandle() {
-        if(ownEGLSurface) {
-            recreateSurface();
+    protected final void createHandle() {
+        final EGLWrappedSurface eglws = (EGLWrappedSurface) surface;
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": createHandle of "+eglws);
+        }
+        if( eglws.containsUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE ) ) {
+            if( EGL.EGL_NO_SURFACE != eglws.getSurfaceHandle() ) {
+                throw new InternalError("Set surface but claimed to be invalid: "+eglws);
+            }
+            eglws.setSurfaceHandle( createEGLSurface() );
+        } else if( EGL.EGL_NO_SURFACE == eglws.getSurfaceHandle() ) {
+            throw new InternalError("Nil surface but claimed to be valid: "+eglws);
         }
     }
-    
-    protected void setRealizedImpl() {
-        if (realized) {
-            AbstractGraphicsConfiguration aConfig = surface.getGraphicsConfiguration();
-            AbstractGraphicsDevice aDevice = aConfig.getScreen().getDevice();
-            if(aDevice instanceof EGLGraphicsDevice) {
-                if(DEBUG) {
-                    System.err.println(getThreadName() + ": EGLDrawable.setRealized(true): using existing EGL config - START");
-                }
-                // just fetch the data .. trust but verify ..
-                eglDisplay = aDevice.getHandle();
-                if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                    throw new GLException("Invalid EGL display in EGLGraphicsDevice from "+aDevice);
-                }
-                if(aConfig instanceof EGLGraphicsConfiguration) {
-                    eglConfig = (EGLGraphicsConfiguration) aConfig; // done ..
-                    if (null == eglConfig) {
-                        throw new GLException("Null EGLGraphicsConfiguration from "+aConfig);
-                    }
 
-                    int[] tmp = new int[1];
-                    if ( 0 != surface.getSurfaceHandle() &&
-                         EGL.eglQuerySurface(eglDisplay, surface.getSurfaceHandle(), EGL.EGL_CONFIG_ID, tmp, 0) ) {
-                        // surface holds static EGLSurface
-                        eglSurface = surface.getSurfaceHandle();
-                        if(DEBUG) {
-                            System.err.println(getThreadName() + ": setSurface re-using component's EGLSurface: handle "+toHexString(eglSurface));
-                        }
-                    } else {
-                        // EGLSurface is ours - subsequent updateHandle() will issue recreateSurface();
-                        ownEGLSurface=true;
-                    }
-                } else {
-                    throw new GLException("EGLGraphicsDevice hold by non EGLGraphicsConfiguration: "+aConfig);
-                }
-            } else {
-                if(DEBUG) {
-                    System.err.println(getThreadName() + ": EGLDrawable.setRealized(true): creating new EGL config - START");
-                }
-                // create a new EGL config ..
-                ownEGLDisplay=true;
-                // EGLSurface is ours ..
-                ownEGLSurface=true;
+    @Override
+    protected void destroyHandle() {
+        final EGLWrappedSurface eglws = (EGLWrappedSurface) surface;
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": destroyHandle of "+eglws);
+        }
+        if( EGL.EGL_NO_SURFACE == eglws.getSurfaceHandle() ) {
+            throw new InternalError("Nil surface but claimed to be valid: "+eglws);
+        }
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) eglws.getGraphicsConfiguration().getScreen().getDevice();
+        if( eglws.containsUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE ) ) {
+            EGL.eglDestroySurface(eglDevice.getHandle(), eglws.getSurfaceHandle());
+            eglws.setSurfaceHandle(EGL.EGL_NO_SURFACE);
+        }
+    }
 
-                eglDisplay = EGLDisplayUtil.eglGetDisplay(surface, true);
-                if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                    throw new GLException("Failed to created EGL display: "+surface+", "+aDevice+", error "+toHexString(EGL.eglGetError()));
-                }
-                if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
-                    throw new GLException("eglInitialize failed"+", error "+Integer.toHexString(EGL.eglGetError()));
-                }
-                EGLGraphicsDevice e = new EGLGraphicsDevice(eglDisplay, AbstractGraphicsDevice.DEFAULT_CONNECTION, AbstractGraphicsDevice.DEFAULT_UNIT);
-                AbstractGraphicsScreen s = new DefaultGraphicsScreen(e, aConfig.getScreen().getIndex());
-                final GLCapabilitiesImmutable capsRequested = (GLCapabilitiesImmutable) aConfig.getRequestedCapabilities();
-                if(aConfig instanceof EGLGraphicsConfiguration) {
-                    final EGLGLCapabilities capsChosen = (EGLGLCapabilities) aConfig.getChosenCapabilities();
-                    if(0 == capsChosen.getEGLConfig()) {
-                        // 'refresh' the native EGLConfig handle
-                        capsChosen.setEGLConfig(EGLGraphicsConfiguration.EGLConfigId2EGLConfig(eglDisplay, capsChosen.getEGLConfigID()));
-                        if(0 == capsChosen.getEGLConfig()) {
-                            throw new GLException("Refreshing native EGLConfig handle failed: "+capsChosen+" of "+aConfig);
-                        }
-                    }
-                    eglConfig  = new EGLGraphicsConfiguration(s, capsChosen, capsRequested, null);
-                    if(DEBUG) {
-                        System.err.println(getThreadName() + ": Reusing chosenCaps: "+eglConfig);
-                    }
-                } else {
-                    eglConfig = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-                            capsRequested, capsRequested, null, s, aConfig.getVisualID(VIDType.NATIVE), false);
-                
-                    if (null == eglConfig) {
-                        throw new GLException("Couldn't create EGLGraphicsConfiguration from "+s);
-                    } else if(DEBUG) {
-                        System.err.println(getThreadName() + ": Chosen eglConfig: "+eglConfig);
-                    }
-                }
-                // subsequent updateHandle() will issue recreateSurface();
-            }
-            if(DEBUG) {
-                System.err.println(getThreadName() + ": EGLDrawable.setRealized(true): END: ownDisplay "+ownEGLDisplay+", ownSurface "+ownEGLSurface);
-            }
-        } else if (ownEGLSurface && eglSurface != EGL.EGL_NO_SURFACE) {
+    protected static boolean isValidEGLSurface(long eglDisplayHandle, long surfaceHandle) {
+        if( 0 == surfaceHandle ) {
+            return false;
+        }
+        final IntBuffer val = Buffers.newDirectIntBuffer(1);
+        final boolean eglSurfaceValid = EGL.eglQuerySurface(eglDisplayHandle, surfaceHandle, EGL.EGL_CONFIG_ID, val);
+        if( !eglSurfaceValid ) {
+            final int eglErr = EGL.eglGetError();
             if(DEBUG) {
-                System.err.println(getThreadName() + ": EGLDrawable.setRealized(false): ownDisplay "+ownEGLDisplay+", ownSurface "+ownEGLSurface+", eglDisplay: "+toHexString(eglDisplay)+", eglSurface: "+toHexString(eglSurface));
+                System.err.println(getThreadName() + ": EGLDrawable.isValidEGLSurface eglQuerySuface failed: error "+toHexString(eglErr)+", "+toHexString(surfaceHandle));
             }
-            // Destroy the window surface
-            if (!EGL.eglDestroySurface(eglDisplay, eglSurface)) {
-                throw new GLException("Error destroying window surface (eglDestroySurface)");
-            }
-            eglSurface = EGL.EGL_NO_SURFACE;
-            if (ownEGLDisplay && EGL.EGL_NO_DISPLAY!=eglDisplay) {
-                EGLDisplayUtil.eglTerminate(eglDisplay);
-            }
-            eglDisplay=EGL.EGL_NO_DISPLAY;
-            eglConfig=null;
         }
+        return eglSurfaceValid;
     }
 
-    protected final void swapBuffersImpl() {
-        // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
-        if(!EGL.eglSwapBuffers(eglDisplay, eglSurface)) {
-            throw new GLException("Error swapping buffers, eglError "+toHexString(EGL.eglGetError())+", "+this);
+    @Override
+    protected final void setRealizedImpl() {
+        if(DEBUG) {
+            System.err.println(getThreadName() + ": EGLDrawable.setRealized("+realized+"): NOP - "+surface);
         }
     }
 
-    /** 
-     * Surface not realizes yet (onscreen) .. Quering EGL surface size only makes sense for external drawable.
-     * Leave it here for later impl. of an EGLExternalDrawable.  
-    public int getWidth() {
-        int[] tmp = new int[1];
-        if (!EGL.eglQuerySurface(eglDisplay, eglSurface, EGL.EGL_WIDTH, tmp, 0)) {
-            throw new GLException("Error querying surface width, eglError "+toHexString(EGL.eglGetError()));
+    @Override
+    protected final void swapBuffersImpl(boolean doubleBuffered) {
+        if(doubleBuffered) {
+            final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) surface.getGraphicsConfiguration().getScreen().getDevice();
+            // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
+            if(!EGL.eglSwapBuffers(eglDevice.getHandle(), surface.getSurfaceHandle())) {
+                throw new GLException("Error swapping buffers, eglError "+toHexString(EGL.eglGetError())+", "+this);
+            }
         }
-        return tmp[0];
     }
 
-    public int getHeight() {
-        int[] tmp = new int[1];
-        if (!EGL.eglQuerySurface(eglDisplay, eglSurface, EGL.EGL_HEIGHT, tmp, 0)) {
-            throw new GLException("Error querying surface height, eglError "+toHexString(EGL.eglGetError()));
-        }
-        return tmp[0];
-    } */
-
+    @Override
     public GLDynamicLookupHelper getGLDynamicLookupHelper() {
-        if (getGLProfile().usesNativeGLES2()) {
+        if (getGLProfile().usesNativeGLES3()) {
+            return getFactoryImpl().getGLDynamicLookupHelper(3);
+        } else if (getGLProfile().usesNativeGLES2()) {
             return getFactoryImpl().getGLDynamicLookupHelper(2);
         } else if (getGLProfile().usesNativeGLES1()) {
             return getFactoryImpl().getGLDynamicLookupHelper(1);
@@ -260,12 +177,13 @@ public abstract class EGLDrawable extends GLDrawableImpl {
         }
     }
 
+    @Override
     public String toString() {
         return getClass().getName()+"[realized "+isRealized()+
                     ",\n\tfactory    "+getFactory()+
                     ",\n\tsurface    "+getNativeSurface()+
-                    ",\n\teglSurface "+toHexString(eglSurface)+
-                    ",\n\teglConfig  "+eglConfig+
+                    ",\n\teglSurface "+toHexString(surface.getSurfaceHandle())+
+                    ",\n\teglConfig  "+surface.getGraphicsConfiguration()+
                     ",\n\trequested  "+getRequestedGLCapabilities()+
                     ",\n\tchosen     "+getChosenGLCapabilities()+"]";
     }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
index 4b77bfa87..9ee0134f1 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,93 +29,109 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.egl;
 
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import javax.media.opengl.GLProfile.ShutdownType;
-
-import com.jogamp.common.JogampRuntimeException;
-import com.jogamp.common.os.Platform;
-import com.jogamp.common.util.*;
-import com.jogamp.nativewindow.WrappedSurface;
-import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
-
-import jogamp.opengl.*;
-
+import java.nio.IntBuffer;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.HashMap;
+import java.util.HashSet;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Set;
+
+import javax.media.nativewindow.AbstractGraphicsConfiguration;
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.AbstractGraphicsScreen;
+import javax.media.nativewindow.DefaultGraphicsScreen;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowFactory;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.nativewindow.VisualIDHolder;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLCapabilities;
+import javax.media.opengl.GLCapabilitiesChooser;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLProfile;
+
+import jogamp.nativewindow.WrappedSurface;
+import jogamp.opengl.Debug;
+import jogamp.opengl.GLContextImpl;
+import jogamp.opengl.GLDrawableFactoryImpl;
+import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+import jogamp.opengl.SharedResourceRunner;
+
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.nio.PointerBuffer;
+import com.jogamp.common.os.Platform;
+import com.jogamp.common.util.ReflectionUtil;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+import com.jogamp.opengl.GLRendererQuirks;
 
 public class EGLDrawableFactory extends GLDrawableFactoryImpl {
+    protected static final boolean DEBUG = GLDrawableFactoryImpl.DEBUG; // allow package access
+
+    /* package */ static final boolean QUERY_EGL_ES_NATIVE_TK;
+
+    static {
+        Debug.initSingleton();
+        QUERY_EGL_ES_NATIVE_TK = Debug.isPropertyDefined("jogl.debug.EGLDrawableFactory.QueryNativeTK", true);
+    }
+
     private static GLDynamicLookupHelper eglES1DynamicLookupHelper = null;
     private static GLDynamicLookupHelper eglES2DynamicLookupHelper = null;
-    private static boolean isANGLE = false;
-    
+
     private static final boolean isANGLE(GLDynamicLookupHelper dl) {
         if(Platform.OSType.WINDOWS == Platform.OS_TYPE) {
-            final boolean r = 0 != dl.dynamicLookupFunction("eglQuerySurfacePointerANGLE") ||
-                              0 != dl.dynamicLookupFunction("glBlitFramebufferANGLE") ||
-                              0 != dl.dynamicLookupFunction("glRenderbufferStorageMultisampleANGLE");
-            return r;
+            return dl.isFunctionAvailable("eglQuerySurfacePointerANGLE") ||
+                   dl.isFunctionAvailable("glBlitFramebufferANGLE") ||
+                   dl.isFunctionAvailable("glRenderbufferStorageMultisampleANGLE");
         } else {
             return false;
         }
     }
-    
+
+    private static final boolean includesES1(GLDynamicLookupHelper dl) {
+        return dl.isFunctionAvailable("glLoadIdentity") &&
+               dl.isFunctionAvailable("glEnableClientState") &&
+               dl.isFunctionAvailable("glColorPointer");
+    }
+
     public EGLDrawableFactory() {
         super();
-        
+
         // Register our GraphicsConfigurationFactory implementations
         // The act of constructing them causes them to be registered
         EGLGraphicsConfigurationFactory.registerFactory();
 
         // Check for other underlying stuff ..
-        if(NativeWindowFactory.TYPE_X11.equals(NativeWindowFactory.getNativeWindowType(true))) {
+        if(NativeWindowFactory.TYPE_X11 == NativeWindowFactory.getNativeWindowType(true)) {
+            hasX11 = true;
             try {
                 ReflectionUtil.createInstance("jogamp.opengl.x11.glx.X11GLXGraphicsConfigurationFactory", EGLDrawableFactory.class.getClassLoader());
-            } catch (JogampRuntimeException jre) { /* n/a .. */ }
+            } catch (Exception jre) { /* n/a .. */ }
         }
 
-        defaultDevice = new EGLGraphicsDevice(AbstractGraphicsDevice.DEFAULT_CONNECTION, AbstractGraphicsDevice.DEFAULT_UNIT);
-        
-        // FIXME: Probably need to move EGL from a static model 
-        // to a dynamic one, where there can be 2 instances 
+        // FIXME: Probably need to move EGL from a static model
+        // to a dynamic one, where there can be 2 instances
         // for each ES profile with their own ProcAddressTable.
 
         synchronized(EGLDrawableFactory.class) {
-            /**
-             * Currently AMD's EGL impl. crashes at eglGetDisplay(EGL_DEFAULT_DISPLAY)
-             *  
-            // Check Desktop ES2 Availability first (AMD, ..)
-            if(null==eglES2DynamicLookupHelper) {
-                GLDynamicLookupHelper tmp=null;
-                try {
-                    tmp = new GLDynamicLookupHelper(new DesktopES2DynamicLibraryBundleInfo());
-                } catch (GLException gle) {
-                    if(DEBUG) {
-                        gle.printStackTrace();
-                    }
-                }                
-                if(null!=tmp && tmp.isLibComplete()) {
-                    eglES2DynamicLookupHelper = tmp;
-                    EGL.resetProcAddressTable(eglES2DynamicLookupHelper);
-                    if (GLProfile.DEBUG) {
-                        System.err.println("Info: EGLDrawableFactory: Desktop ES2 - OK");
-                    }                    
-                } else if (GLProfile.DEBUG) {
-                    System.err.println("Info: EGLDrawableFactory: Desktop ES2 - NOPE");
-                }                    
-            } */
             final boolean hasDesktopES2 = null != eglES2DynamicLookupHelper;
-            
+
             if(!hasDesktopES2 && null==eglES1DynamicLookupHelper) {
                 GLDynamicLookupHelper tmp=null;
                 try {
@@ -124,18 +140,18 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                     if(DEBUG) {
                         gle.printStackTrace();
                     }
-                }                
+                }
                 if(null!=tmp && tmp.isLibComplete()) {
                     eglES1DynamicLookupHelper = tmp;
                     EGL.resetProcAddressTable(eglES1DynamicLookupHelper);
                     final boolean isANGLEES1 = isANGLE(eglES1DynamicLookupHelper);
                     isANGLE |= isANGLEES1;
-                    if (GLProfile.DEBUG) {
+                    if (DEBUG || GLProfile.DEBUG) {
                         System.err.println("Info: EGLDrawableFactory: EGL ES1 - OK, isANGLE: "+isANGLEES1);
-                    }                    
-                } else if (GLProfile.DEBUG) {
-                    System.err.println("Info: EGLDrawableFactory: EGL ES1 - NOPE");
-                }                    
+                    }
+                } else if (DEBUG || GLProfile.DEBUG) {
+                    System.err.println("Info: EGLDrawableFactory: EGL ES1 - NOPE (ES1 lib)");
+                }
             }
             if(!hasDesktopES2 && null==eglES2DynamicLookupHelper) {
                 GLDynamicLookupHelper tmp=null;
@@ -145,196 +161,545 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                     if(DEBUG) {
                         gle.printStackTrace();
                     }
-                }                
+                }
                 if(null!=tmp && tmp.isLibComplete()) {
                     eglES2DynamicLookupHelper = tmp;
                     EGL.resetProcAddressTable(eglES2DynamicLookupHelper);
+                    final boolean includesES1 = null == eglES1DynamicLookupHelper && includesES1(eglES2DynamicLookupHelper);
+                    if(includesES1) {
+                        eglES1DynamicLookupHelper = tmp;
+                    }
                     final boolean isANGLEES2 = isANGLE(eglES2DynamicLookupHelper);
                     isANGLE |= isANGLEES2;
-                    if (GLProfile.DEBUG) {
-                        System.err.println("Info: EGLDrawableFactory: EGL ES2 - OK, isANGLE: "+isANGLEES2);
-                    }                    
-                } else if (GLProfile.DEBUG) {
+                    if (DEBUG || GLProfile.DEBUG) {
+                        System.err.println("Info: EGLDrawableFactory: EGL ES2 - OK (includesES1 "+includesES1+", isANGLE: "+isANGLEES2+")");
+                        if(includesES1) {
+                            System.err.println("Info: EGLDrawableFactory: EGL ES1 - OK (ES2 lib)");
+                        }
+                    }
+                } else if (DEBUG || GLProfile.DEBUG) {
                     System.err.println("Info: EGLDrawableFactory: EGL ES2 - NOPE");
-                }                    
+                }
+            }
+            if( null != eglES2DynamicLookupHelper || null != eglES1DynamicLookupHelper ) {
+                if(isANGLE && !enableANGLE) {
+                    if(DEBUG || GLProfile.DEBUG) {
+                        System.err.println("Info: EGLDrawableFactory.init - EGL/ES2 ANGLE disabled");
+                    }
+                } else {
+                    if( isANGLE && ( DEBUG || GLProfile.DEBUG ) ) {
+                        System.err.println("Info: EGLDrawableFactory.init - EGL/ES2 ANGLE enabled");
+                    }
+                    sharedMap = new HashMap<String /*uniqueKey*/, SharedResource>();
+                    sharedMapCreateAttempt = new HashSet<String>();
+                    // FIXME: defaultDevice.open() triggers eglInitialize(..) which crashed on Windows w/ Chrome/ANGLE, FF/ANGLE!
+                    defaultDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(EGL.EGL_DEFAULT_DISPLAY, AbstractGraphicsDevice.DEFAULT_CONNECTION, AbstractGraphicsDevice.DEFAULT_UNIT);
+                }
             }
         }
     }
 
-    protected final void destroy(ShutdownType shutdownType) {
+    @Override
+    protected final boolean isComplete() {
+        return null != sharedMap; // null != eglES2DynamicLookupHelper || null != eglES1DynamicLookupHelper;
+    }
+
+
+    @Override
+    protected final void shutdownImpl() {
+        if( DEBUG ) {
+            System.err.println("EGLDrawableFactory.shutdown");
+        }
         if(null != sharedMap) {
+            if(DEBUG) {
+                dumpMap();
+            }
             Collection<SharedResource> srl = sharedMap.values();
             for(Iterator<SharedResource> sri = srl.iterator(); sri.hasNext(); ) {
                 SharedResource sr = sri.next();
                 if(DEBUG) {
-                    System.err.println("EGLDrawableFactory.destroy("+shutdownType+"): "+sr.device.toString());
-                }
-                final long eglDisplay = sr.device.getHandle();
-                if(EGL.EGL_NO_DISPLAY != eglDisplay) {
-                    EGLDisplayUtil.eglTerminate(eglDisplay);
+                    System.err.println("EGLDrawableFactory.shutdown: "+sr.device.toString());
                 }
+                sr.device.close();
             }
             sharedMap.clear();
+            sharedMapCreateAttempt.clear();
             sharedMap = null;
+            sharedMapCreateAttempt = null;
+        }
+        if(null != defaultSharedResource) {
+            defaultSharedResource = null;
+        }
+        if(null != defaultDevice) {
+            defaultDevice.close();
+            defaultDevice = null;
         }
-        defaultDevice = null;
         /**
          * Pulling away the native library may cause havoc ..
          */
-        if(ShutdownType.COMPLETE == shutdownType) {
-            if(null != eglES1DynamicLookupHelper) {
-                // eglES1DynamicLookupHelper.destroy();
-                eglES1DynamicLookupHelper = null;
-            }
-            if(null != eglES2DynamicLookupHelper) {
-                // eglES2DynamicLookupHelper.destroy();
-                eglES2DynamicLookupHelper = null;
-            }
+        if(null != eglES1DynamicLookupHelper) {
+            // eglES1DynamicLookupHelper.destroy();
+            eglES1DynamicLookupHelper = null;
+        }
+        if(null != eglES2DynamicLookupHelper) {
+            // eglES2DynamicLookupHelper.destroy();
+            eglES2DynamicLookupHelper = null;
         }
         EGLGraphicsConfigurationFactory.unregisterFactory();
+        EGLDisplayUtil.shutdown(DEBUG);
+    }
+
+    private void dumpMap() {
+        synchronized(sharedMap) {
+            System.err.println("EGLDrawableFactory.map "+sharedMap.size());
+            int i=0;
+            Set<String> keys = sharedMap.keySet();
+            for(Iterator<String> keyI = keys.iterator(); keyI.hasNext(); i++) {
+                String key = keyI.next();
+                SharedResource sr = sharedMap.get(key);
+                System.err.println("EGLDrawableFactory.map["+i+"] "+key+" -> "+sr.getDevice()+", "+
+                                   "es1   [avail "+sr.wasES1ContextCreated+", pbuffer "+sr.hasPBufferES1+", quirks "+sr.rendererQuirksES1+", ctp "+EGLContext.getGLVersion(1, 0, sr.ctpES1, null)+"], "+
+                                   "es2/3 [es2 "+sr.wasES2ContextCreated+", es3 "+sr.wasES3ContextCreated+", [pbuffer "+sr.hasPBufferES3ES2+", quirks "+sr.rendererQuirksES3ES2+", ctp "+EGLContext.getGLVersion(2, 0, sr.ctpES3ES2, null)+"]]");
+            }
+            ;
+        }
     }
 
-    private HashMap<String /*connection*/, SharedResource> sharedMap = new HashMap<String /*connection*/, SharedResource>();
-    private EGLGraphicsDevice defaultDevice;
+    private HashMap<String /*uniqueKey*/, SharedResource> sharedMap = null;
+    private HashSet<String> sharedMapCreateAttempt = null;
+    private EGLGraphicsDevice defaultDevice = null;
+    private SharedResource defaultSharedResource = null;
+    private boolean isANGLE = false;
+    private boolean hasX11 = false;
 
-    static class SharedResource {
+    static class SharedResource implements SharedResourceRunner.Resource {
       private final EGLGraphicsDevice device;
-      // private final EGLDrawable drawable;
       // private final EGLContext contextES1;
       // private final EGLContext contextES2;
+      // private final EGLContext contextES3;
       private final boolean wasES1ContextCreated;
       private final boolean wasES2ContextCreated;
+      private final boolean wasES3ContextCreated;
+      private final GLRendererQuirks rendererQuirksES1;
+      private final GLRendererQuirks rendererQuirksES3ES2;
+      private final int ctpES1;
+      private final int ctpES3ES2;
+      private final boolean hasPBufferES1;
+      private final boolean hasPBufferES3ES2;
 
-      SharedResource(EGLGraphicsDevice dev, boolean wasContextES1Created, boolean wasContextES2Created 
-                     /*EGLDrawable draw, EGLContext ctxES1, EGLContext ctxES2 */) {
+      SharedResource(EGLGraphicsDevice dev,
+                     boolean wasContextES1Created, boolean hasPBufferES1, GLRendererQuirks rendererQuirksES1, int ctpES1,
+                     boolean wasContextES2Created, boolean wasContextES3Created,
+                     boolean hasPBufferES3ES2, GLRendererQuirks rendererQuirksES3ES2, int ctpES3ES2) {
           this.device = dev;
-          // this.drawable = draw;
           // this.contextES1 = ctxES1;
-          // this.contextES2 = ctxES2;
           this.wasES1ContextCreated = wasContextES1Created;
+          this.hasPBufferES1= hasPBufferES1;
+          this.rendererQuirksES1 = rendererQuirksES1;
+          this.ctpES1 = ctpES1;
+
+          // this.contextES2 = ctxES2;
+          // this.contextES3 = ctxES3;
           this.wasES2ContextCreated = wasContextES2Created;
+          this.wasES3ContextCreated = wasContextES3Created;
+          this.hasPBufferES3ES2= hasPBufferES3ES2;
+          this.rendererQuirksES3ES2 = rendererQuirksES3ES2;
+          this.ctpES3ES2 = ctpES3ES2;
       }
-      final EGLGraphicsDevice getDevice() { return device; }
-      // final EGLDrawable getDrawable() { return drawable; }
+      @Override
+      public final boolean isValid() {
+          return wasES1ContextCreated || wasES2ContextCreated || wasES3ContextCreated;
+      }
+      @Override
+      public final EGLGraphicsDevice getDevice() { return device; }
       // final EGLContext getContextES1() { return contextES1; }
       // final EGLContext getContextES2() { return contextES2; }
-      final boolean wasES1ContextAvailable() { return wasES1ContextCreated; }
-      final boolean wasES2ContextAvailable() { return wasES2ContextCreated; }
+      // final EGLContext getContextES3() { return contextES3; }
+
+      @Override
+      public AbstractGraphicsScreen getScreen() {
+          return null;
+      }
+      @Override
+      public GLDrawableImpl getDrawable() {
+          return null;
+      }
+      @Override
+      public GLContextImpl getContext() {
+          return null;
+      }
+      @Override
+      public GLRendererQuirks getRendererQuirks() {
+          return null != rendererQuirksES3ES2 ? rendererQuirksES3ES2 : rendererQuirksES1 ;
+      }
     }
 
+    @Override
     public final AbstractGraphicsDevice getDefaultDevice() {
       return defaultDevice;
     }
 
+    @Override
     public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
       // via mappings (X11/WGL/.. -> EGL) we shall be able to handle all types.
-      return null!=eglES2DynamicLookupHelper || null!=eglES1DynamicLookupHelper;
+      return null != sharedMap ; // null!=eglES2DynamicLookupHelper || null!=eglES1DynamicLookupHelper;
     }
 
-    /**
-    private boolean isEGLContextAvailable(EGLGraphicsDevice sharedDevice, String profile) {
-        boolean madeCurrent = false;
-        final GLCapabilities caps = new GLCapabilities(GLProfile.get(profile));
-        caps.setRedBits(5); caps.setGreenBits(5); caps.setBlueBits(5); caps.setAlphaBits(0);
-        caps.setDoubleBuffered(false);
-        caps.setOnscreen(false);
-        caps.setPBuffer(true);
-        final EGLDrawable drawable = (EGLDrawable) createGLDrawable( createOffscreenSurfaceImpl(sharedDevice, caps, caps, null, 64, 64) );        
-        if(null!=drawable) {
-            final EGLContext context = (EGLContext) drawable.createContext(null);
-            if (null != context) {
-                context.setSynchronized(true);
-                try {
-                    context.makeCurrent(); // could cause exception
-                    madeCurrent = context.isCurrent();
-                } catch (GLException gle) {
-                    if (DEBUG) {
-                        System.err.println("EGLDrawableFactory.createShared: INFO: makeCurrent failed");
-                        gle.printStackTrace();
-                    }                    
-                } finally {
-                    context.destroy();
-                }
+    private static List<GLCapabilitiesImmutable> getAvailableEGLConfigs(EGLGraphicsDevice eglDisplay, GLCapabilitiesImmutable caps) {
+        final IntBuffer numConfigs = Buffers.newDirectIntBuffer(1);
+        if(!EGL.eglGetConfigs(eglDisplay.getHandle(), null, 0, numConfigs)) {
+            throw new GLException("EGLDrawableFactory.getAvailableEGLConfigs: Get maxConfigs (eglGetConfigs) call failed, error "+EGLContext.toHexString(EGL.eglGetError()));
+        }
+        if(0 < numConfigs.get(0)) {
+            final PointerBuffer configs = PointerBuffer.allocateDirect(numConfigs.get(0));
+            final IntBuffer attrs = EGLGraphicsConfiguration.GLCapabilities2AttribList(caps);
+            final int winattrmask = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(caps);
+            if( EGL.eglChooseConfig(eglDisplay.getHandle(), attrs, configs, configs.capacity(), numConfigs) && numConfigs.get(0) > 0) {
+                return EGLGraphicsConfigurationFactory.eglConfigs2GLCaps(eglDisplay, caps.getGLProfile(), configs, numConfigs.get(0), winattrmask, false /* forceTransparentFlag */, false /* onlyFirstValid */);
             }
-            drawable.destroy();
         }
-        return madeCurrent;
-    } */
-    
-    /* package */ SharedResource getOrCreateEGLSharedResource(AbstractGraphicsDevice adevice) {
-        if(null == eglES1DynamicLookupHelper && null == eglES2DynamicLookupHelper) {
-            return null;
+        return new ArrayList<GLCapabilitiesImmutable>(0);
+    }
+
+    private static void dumpEGLInfo(final String prefix, final long eglDisplay) {
+        final String eglVendor = EGL.eglQueryString(eglDisplay, EGL.EGL_VENDOR);
+        final String eglClientAPIs = EGL.eglQueryString(eglDisplay, EGL.EGL_CLIENT_APIS);
+        final String eglVersion = EGL.eglQueryString(eglDisplay, EGL.EGL_VERSION);
+        System.err.println(prefix+"EGL vendor "+eglVendor+", version "+eglVersion+", clientAPIs "+eglClientAPIs);
+    }
+
+    private boolean mapAvailableEGLESConfig(AbstractGraphicsDevice adevice, int[] esProfile,
+                                            boolean[] hasPBuffer, GLRendererQuirks[] rendererQuirks, int[] ctp) {
+        final String profileString;
+        switch( esProfile[0] ) {
+            case 3:
+                profileString = GLProfile.GLES3; break;
+            case 2:
+                profileString = GLProfile.GLES2; break;
+            case 1:
+                profileString = GLProfile.GLES1; break;
+            default:
+                throw new GLException("Invalid ES profile number "+esProfile);
         }
-        String connection = adevice.getConnection();
-        SharedResource sr;
-        synchronized(sharedMap) {
-            sr = (SharedResource) sharedMap.get(connection);
-        }
-        if(null==sr) {
-            long eglDisplay = EGLDisplayUtil.eglGetDisplay(EGL.EGL_DEFAULT_DISPLAY);
-            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                throw new GLException("Failed to created EGL default display: error 0x"+Integer.toHexString(EGL.eglGetError()));
-            } else if(DEBUG) {
-                System.err.println("EGLDrawableFactory.createShared: eglDisplay(EGL_DEFAULT_DISPLAY): 0x"+Long.toHexString(eglDisplay));
+        if ( !GLProfile.isAvailable(adevice, profileString) ) {
+            if( DEBUG ) {
+                System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: "+profileString+" n/a on "+adevice);
             }
-            if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
-                throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+            return false;
+        }
+        final GLProfile glp = GLProfile.get(adevice, profileString) ;
+        final GLDrawableFactoryImpl desktopFactory = (GLDrawableFactoryImpl) GLDrawableFactory.getDesktopFactory();
+        final boolean initDefaultDevice = 0 == defaultDevice.getHandle(); // Note: GLProfile always triggers EGL device initialization first!
+        final boolean mapsADeviceToDefaultDevice = !QUERY_EGL_ES_NATIVE_TK || initDefaultDevice ||
+                                                   null == desktopFactory || adevice instanceof EGLGraphicsDevice ;
+        if( DEBUG ) {
+            System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: "+profileString+" ( "+esProfile+" ), "+
+                               "defaultSharedResourceSet "+(null!=defaultSharedResource)+", mapsADeviceToDefaultDevice "+mapsADeviceToDefaultDevice+
+                               " (QUERY_EGL_ES_NATIVE_TK "+QUERY_EGL_ES_NATIVE_TK+", hasDesktopFactory "+(null != desktopFactory)+
+                               ", isEGLGraphicsDevice "+(adevice instanceof EGLGraphicsDevice)+")");
+        }
+
+        EGLGraphicsDevice eglDevice = null;
+        NativeSurface surface = null;
+        ProxySurface upstreamSurface = null; // X11, GLX, ..
+        ProxySurface downstreamSurface = null; // EGL
+        boolean success = false;
+        try {
+            final GLCapabilities reqCapsAny = new GLCapabilities(glp);
+            reqCapsAny.setRedBits(5); reqCapsAny.setGreenBits(5); reqCapsAny.setBlueBits(5); reqCapsAny.setAlphaBits(0);
+            reqCapsAny.setDoubleBuffered(false);
+
+            if( mapsADeviceToDefaultDevice ) {
+                // In this branch, any non EGL device is mapped to EGL default shared resources (default behavior).
+                // Only one default shared resource instance is ever be created.
+                if( initDefaultDevice ) {
+                    defaultDevice.open();
+
+                    // Probe for GLRendererQuirks.SingletonEGLDisplayOnly
+                    final long secondEGLDisplay = EGL.eglGetDisplay(EGL.EGL_DEFAULT_DISPLAY);
+                    if ( EGL.EGL_NO_DISPLAY == secondEGLDisplay ) {
+                        final int[] quirks = { GLRendererQuirks.SingletonEGLDisplayOnly };
+                        GLRendererQuirks.addStickyDeviceQuirks(adevice, quirks, 0, 1);
+                        EGLDisplayUtil.setSingletonEGLDisplayOnly(true);
+                        if(DEBUG) {
+                            System.err.println("Quirk: "+GLRendererQuirks.toString(quirks[0])+": cause: Second eglGetDisplay(EGL_DEFAULT_DISPLAY) failed");
+                        }
+                    }
+                }
+                if( DEBUG ) {
+                    dumpEGLInfo("EGLDrawableFactory.mapAvailableEGLESConfig: ", defaultDevice.getHandle());
+                }
+
+                final GLCapabilitiesImmutable reqCapsPBuffer = GLGraphicsConfigurationUtil.fixGLPBufferGLCapabilities(reqCapsAny);
+                final List<GLCapabilitiesImmutable> availablePBufferCapsL = getAvailableEGLConfigs(defaultDevice, reqCapsPBuffer);
+                hasPBuffer[0] = availablePBufferCapsL.size() > 0;
+
+                // 1st case: adevice is not the EGL default device, map default shared resources
+                if( adevice != defaultDevice ) {
+                    if(null == defaultSharedResource) {
+                        return false;
+                    }
+                    switch(esProfile[0]) {
+                        case 3:
+                            if( !defaultSharedResource.wasES3ContextCreated ) {
+                                return false;
+                            }
+                            rendererQuirks[0] = defaultSharedResource.rendererQuirksES3ES2;
+                            ctp[0] = defaultSharedResource.ctpES3ES2;
+                            break;
+                        case 2:
+                            if( !defaultSharedResource.wasES2ContextCreated ) {
+                                return false;
+                            }
+                            rendererQuirks[0] = defaultSharedResource.rendererQuirksES3ES2;
+                            ctp[0] = defaultSharedResource.ctpES3ES2;
+                            break;
+                        case 1:
+                            if( !defaultSharedResource.wasES1ContextCreated ) {
+                                return false;
+                            }
+                            rendererQuirks[0] = defaultSharedResource.rendererQuirksES1;
+                            ctp[0] = defaultSharedResource.ctpES1;
+                            break;
+                    }
+                    if( null != rendererQuirks[0] ) {
+                        GLRendererQuirks.addStickyDeviceQuirks(adevice, rendererQuirks[0]);
+                    }
+                    EGLContext.mapStaticGLVersion(adevice, esProfile[0], 0, ctp[0]);
+                    return true;
+                }
+
+                // attempt to created the default shared resources ..
+
+                if( hasPBuffer[0] ) {
+                    // 2nd case create defaultDevice shared resource using pbuffer surface
+                    downstreamSurface = createDummySurfaceImpl(defaultDevice, false, reqCapsPBuffer, reqCapsPBuffer, null, 64, 64); // egl pbuffer offscreen
+                    if( null != downstreamSurface ) {
+                        downstreamSurface.createNotify();
+                    }
+                    surface = downstreamSurface;
+                } else {
+                    // 3rd case fake creation of defaultDevice shared resource, no pbuffer available
+                    final List<GLCapabilitiesImmutable> capsAnyL = getAvailableEGLConfigs(defaultDevice, reqCapsAny);
+                    if(capsAnyL.size() > 0) {
+                        final GLCapabilitiesImmutable chosenCaps = capsAnyL.get(0);
+                        EGLContext.mapStaticGLESVersion(defaultDevice, chosenCaps);
+                        success = true;
+                    }
+                    if(DEBUG) {
+                        System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig() no pbuffer config available, detected !pbuffer config: "+success);
+                        EGLGraphicsConfigurationFactory.printCaps("!PBufferCaps", capsAnyL, System.err);
+                    }
+                }
+                eglDevice = defaultDevice; // reuse
+            } else {
+                // 4th case always creates a true mapping of given device to EGL
+                upstreamSurface = desktopFactory.createDummySurface(adevice, reqCapsAny, null, 64, 64); // X11, WGL, .. dummy window
+                if(null != upstreamSurface) {
+                    upstreamSurface.createNotify();
+                }
+                surface = upstreamSurface;
+                eglDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(surface);
+                eglDevice.open();
+                if( DEBUG ) {
+                    dumpEGLInfo("EGLDrawableFactory.mapAvailableEGLESConfig: ", eglDevice.getHandle());
+                }
+                hasPBuffer[0] = true;
             }
-            final EGLGraphicsDevice sharedDevice = new EGLGraphicsDevice(eglDisplay, connection, adevice.getUnitID());            
-            // final boolean madeCurrentES1 = isEGLContextAvailable(sharedDevice, GLProfile.GLES1);
-            // final boolean madeCurrentES2 = isEGLContextAvailable(sharedDevice, GLProfile.GLES2);
-            final boolean madeCurrentES1 = true; // FIXME
-            final boolean madeCurrentES2 = true; // FIXME
-            sr = new SharedResource(sharedDevice, madeCurrentES1, madeCurrentES2);
-            synchronized(sharedMap) {
-                sharedMap.put(connection, sr);
+
+            if(null != surface) {
+                final EGLDrawable drawable = (EGLDrawable) createOnscreenDrawableImpl ( surface ); // works w/ implicit pbuffer surface via proxy-hook
+                drawable.setRealized(true);
+                final EGLContext context = (EGLContext) drawable.createContext(null);
+                if (null != context) {
+                    try {
+                        context.makeCurrent(); // could cause exception
+                        if(context.isCurrent()) {
+                            final String glVersion = context.getGL().glGetString(GL.GL_VERSION);
+                            if(null != glVersion) {
+                                context.mapCurrentAvailableGLVersion(eglDevice);
+                                if(eglDevice != adevice) {
+                                    context.mapCurrentAvailableGLVersion(adevice);
+                                }
+                                rendererQuirks[0] = context.getRendererQuirks();
+                                ctp[0] = context.getContextOptions();
+                                esProfile[0] = context.getGLVersionNumber().getMajor();
+                                success = true;
+                            } else {
+                                // Oops .. something is wrong
+                                if(DEBUG) {
+                                    System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: "+eglDevice+", "+context.getGLVersion()+" - VERSION is null, dropping availability!");
+                                }
+                            }
+                        }
+                    } catch (Throwable t) {
+                        if (DEBUG) {
+                            System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: INFO: context create/makeCurrent failed");
+                            t.printStackTrace();
+                        }
+                    } finally {
+                        context.destroy();
+                    }
+                }
+                drawable.setRealized(false);
+            }
+        } catch (Throwable t) {
+            if(DEBUG) {
+                System.err.println("Catched Exception on thread "+getThreadName());
+                t.printStackTrace();
+            }
+            success = false;
+        } finally {
+            if(null != downstreamSurface) {
+                downstreamSurface.destroyNotify();
+            }
+            if( defaultDevice != eglDevice ) { // don't close default device
+                if(null != eglDevice) {
+                    eglDevice.close();
+                }
+                if(null != upstreamSurface) {
+                    upstreamSurface.destroyNotify();
+                }
             }
-            if (DEBUG) {
-                System.err.println("EGLDrawableFactory.createShared: device:  " + sharedDevice);
-                System.err.println("EGLDrawableFactory.createShared: context ES1: " + madeCurrentES1);
-                System.err.println("EGLDrawableFactory.createShared: context ES2: " + madeCurrentES2);
-            }                        
         }
-        return sr;
+        return success;
     }
 
-    protected final Thread getSharedResourceThread() {
-        return null;
+    private final boolean needsToCreateSharedResource(String key, SharedResource[] existing) {
+        synchronized(sharedMap) {
+            final SharedResource sr = sharedMap.get(key);
+            if( null == sr ) {
+                final boolean createAttempted = sharedMapCreateAttempt.contains(key);
+                if(!createAttempted) {
+                    sharedMapCreateAttempt.add(key);
+                }
+                return !createAttempted;
+            } else {
+                if(null != existing) {
+                    existing[0] = sr;
+                }
+                return false;
+            }
+        }
     }
-    
-    protected final boolean createSharedResource(AbstractGraphicsDevice device) {
-        try {
-            SharedResource sr = getOrCreateEGLSharedResource(device);
-            if(null!=sr) {
-                return sr.wasES1ContextAvailable() || sr.wasES2ContextAvailable();
+
+    @Override
+    protected final SharedResource getOrCreateSharedResourceImpl(AbstractGraphicsDevice adevice) {
+        if(null == sharedMap) { // null == eglES1DynamicLookupHelper && null == eglES2DynamicLookupHelper
+            return null;
+        }
+
+        if( needsToCreateSharedResource(defaultDevice.getUniqueID(), null) ) {
+            if (DEBUG) {
+                System.err.println("EGLDrawableFactory.createShared: (defaultDevice): req. device: "+adevice+", defaultDevice "+defaultDevice);
+                Thread.dumpStack();
             }
-        } catch (GLException gle) {
-            if(DEBUG) {
-                System.err.println("Catched Exception while EGL Shared Resource initialization");
-                gle.printStackTrace();
+            if(null != defaultSharedResource) {
+                dumpMap();
+                throw new InternalError("defaultSharedResource already exist: "+defaultSharedResource);
             }
+            defaultSharedResource = createEGLSharedResourceImpl(defaultDevice);
+        }
+
+        final String key = adevice.getUniqueID();
+        if( defaultDevice.getUniqueID().equals(key) ) {
+            return defaultSharedResource;
+        } else {
+            if( null == defaultSharedResource) { // defaultDevice must be initialized before host-device
+                dumpMap();
+                throw new InternalError("defaultSharedResource does not exist");
+            }
+            final SharedResource[] existing = new SharedResource[] { null };
+            if ( !needsToCreateSharedResource(key, existing) ) {
+                return existing[0];
+            }
+            return createEGLSharedResourceImpl(adevice);
         }
-        return false;        
     }
-    
-    protected final GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device) {
-        return null; // n/a for EGL .. since we don't keep the resources
+
+    private SharedResource createEGLSharedResourceImpl(AbstractGraphicsDevice adevice) {
+        final boolean madeCurrentES1;
+        boolean[] hasPBufferES1 = new boolean[] { false };
+        boolean[] hasPBufferES3ES2 = new boolean[] { false };
+        // EGLContext[] eglCtxES1 = new EGLContext[] { null };
+        // EGLContext[] eglCtxES2 = new EGLContext[] { null };
+        GLRendererQuirks[] rendererQuirksES1 = new GLRendererQuirks[] { null };
+        GLRendererQuirks[] rendererQuirksES3ES2 = new GLRendererQuirks[] { null };
+        int[] ctpES1 = new int[] { -1 };
+        int[] ctpES3ES2 = new int[] { -1 };
+
+
+        if (DEBUG) {
+            System.err.println("EGLDrawableFactory.createShared(): device "+adevice);
+        }
+
+        if( null != eglES1DynamicLookupHelper ) {
+            final int[] esProfile = { 1 };
+            madeCurrentES1 = mapAvailableEGLESConfig(adevice, esProfile, hasPBufferES1, rendererQuirksES1, ctpES1) && 1 == esProfile[0];
+        } else {
+            madeCurrentES1 = false;
+        }
+        boolean madeCurrentES2 = false;
+        boolean madeCurrentES3 = false;
+        if( null != eglES2DynamicLookupHelper ) {
+            // ES3 Query
+            final int[] esProfile = { 3 };
+            madeCurrentES3 = mapAvailableEGLESConfig(adevice, esProfile, hasPBufferES3ES2, rendererQuirksES3ES2, ctpES3ES2) && 3 == esProfile[0];
+            if( !madeCurrentES3 ) {
+                // ES2 Query, may result in ES3
+                esProfile[0] = 2;
+                if( mapAvailableEGLESConfig(adevice, esProfile, hasPBufferES3ES2, rendererQuirksES3ES2, ctpES3ES2) ) {
+                    switch( esProfile[0] ) {
+                        case 2: madeCurrentES2 = true; break;
+                        case 3: madeCurrentES3 = true; break;
+                        default: throw new InternalError("XXXX Got "+esProfile[0]);
+                    }
+                }
+            }
+        }
+        if( !EGLContext.getAvailableGLVersionsSet(adevice) ) {
+            // Even though we override the non EGL native mapping intentionally,
+            // avoid exception due to double 'set' - carefull exception of the rule.
+            EGLContext.setAvailableGLVersionsSet(adevice);
+        }
+        if( hasX11 ) {
+            handleDontCloseX11DisplayQuirk(rendererQuirksES1[0]);
+            handleDontCloseX11DisplayQuirk(rendererQuirksES3ES2[0]);
+        }
+        final SharedResource sr = new SharedResource(defaultDevice, madeCurrentES1, hasPBufferES1[0], rendererQuirksES1[0], ctpES1[0],
+                                                                    madeCurrentES2, madeCurrentES3, hasPBufferES3ES2[0], rendererQuirksES3ES2[0], ctpES3ES2[0]);
+
+        synchronized(sharedMap) {
+            sharedMap.put(adevice.getUniqueID(), sr);
+        }
+        if (DEBUG) {
+            System.err.println("EGLDrawableFactory.createShared: devices: queried nativeTK "+QUERY_EGL_ES_NATIVE_TK+", adevice " + adevice + ", defaultDevice " + defaultDevice);
+            System.err.println("EGLDrawableFactory.createShared: context ES1: " + madeCurrentES1 + ", hasPBuffer "+hasPBufferES1[0]+", quirks "+rendererQuirksES1[0]);
+            System.err.println("EGLDrawableFactory.createShared: context ES2: " + madeCurrentES2 + ", hasPBuffer "+hasPBufferES3ES2[0]+", quirks "+rendererQuirksES3ES2[0]);
+            System.err.println("EGLDrawableFactory.createShared: context ES3: " + madeCurrentES3 + ", hasPBuffer "+hasPBufferES3ES2[0]+", quirks "+rendererQuirksES3ES2[0]);
+            dumpMap();
+        }
+        return sr;
     }
-    
-    protected AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device) {
-        SharedResource sr = getOrCreateEGLSharedResource(device);
-        if(null!=sr) {
-            return sr.getDevice();
+
+    private void handleDontCloseX11DisplayQuirk(GLRendererQuirks quirks) {
+        if( null != quirks && quirks.exist( GLRendererQuirks.DontCloseX11Display ) ) {
+            jogamp.nativewindow.x11.X11Util.markAllDisplaysUnclosable();
         }
+    }
+
+    @Override
+    protected final Thread getSharedResourceThread() {
         return null;
     }
 
-    public boolean isANGLE() {
+    public final boolean isANGLE() {
         return isANGLE;
     }
-    
+
+    @Override
     public GLDynamicLookupHelper getGLDynamicLookupHelper(int esProfile) {
-        if (2==esProfile) {
+        if ( 2==esProfile || 3==esProfile ) {
             return eglES2DynamicLookupHelper;
         } else if (1==esProfile) {
             return eglES1DynamicLookupHelper;
@@ -343,20 +708,23 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
         }
     }
 
+    @Override
     protected List<GLCapabilitiesImmutable> getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
-        if(null == eglES1DynamicLookupHelper && null == eglES2DynamicLookupHelper) {
+        if(null == sharedMap) { // null == eglES1DynamicLookupHelper && null == eglES2DynamicLookupHelper
             return new ArrayList<GLCapabilitiesImmutable>(); // null
         }
         return EGLGraphicsConfigurationFactory.getAvailableCapabilities(this, device);
     }
 
+    @Override
     protected GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
         if (target == null) {
           throw new IllegalArgumentException("Null target");
         }
-        return new EGLOnscreenDrawable(this, target);
+        return new EGLOnscreenDrawable(this, EGLWrappedSurface.get(target));
     }
 
+    @Override
     protected GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
         if (target == null) {
           throw new IllegalArgumentException("Null target");
@@ -367,47 +735,104 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
             throw new GLException("Non pbuffer not yet implemented");
         }
         // PBuffer GLDrawable Creation
-        return new EGLPbufferDrawable(this, target);
+        return new EGLPbufferDrawable(this, EGLWrappedSurface.get(target));
     }
 
-    public boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
+    @Override
+    public boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
+        // SharedResource sr = getOrCreateEGLSharedResource(device);
+        // return sr.hasES1PBuffer() || sr.hasES2PBuffer();
         return true;
     }
 
-    protected NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
-        WrappedSurface ns = new WrappedSurface(EGLGraphicsConfigurationFactory.createOffscreenGraphicsConfiguration(device, capsChosen, capsRequested, chooser));
-        ns.surfaceSizeChanged(width, height);
-        return ns;
+    @Override
+    protected ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                    GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
+                                                    GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook) {
+        final boolean ownDevice;
+        final EGLGraphicsDevice device;
+        if( createNewDevice || ! (deviceReq instanceof EGLGraphicsDevice) ) {
+            final long nativeDisplayID = ( deviceReq instanceof EGLGraphicsDevice) ?
+                    ( (EGLGraphicsDevice) deviceReq ).getNativeDisplayID() : deviceReq.getHandle() ;
+            device = EGLDisplayUtil.eglCreateEGLGraphicsDevice(nativeDisplayID, deviceReq.getConnection(), deviceReq.getUnitID());
+            device.open();
+            ownDevice = true;
+        } else {
+            device = (EGLGraphicsDevice) deviceReq;
+            ownDevice = false;
+        }
+        final DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+        final EGLGraphicsConfiguration config = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
+        if(null == config) {
+            throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen);
+        }
+        return new WrappedSurface(config, 0, upstreamHook, ownDevice);
+    }
+
+    @Override
+    public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                     GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+        chosenCaps = GLGraphicsConfigurationUtil.fixGLPBufferGLCapabilities(chosenCaps); // complete validation in EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(..) above
+        return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser, new EGLDummyUpstreamSurfaceHook(width, height));
+    }
+
+    /**
+     * @param ms {@link MutableSurface} which dimensions and config are being used to create the pbuffer surface.
+     *           It will also hold the resulting pbuffer surface handle.
+     * @param useTexture
+     * @return the passed {@link MutableSurface} which now has the EGL pbuffer surface set as it's handle
+     */
+    protected static MutableSurface createPBufferSurfaceImpl(MutableSurface ms, boolean useTexture) {
+        return null;
+    }
+    protected static long createPBufferSurfaceImpl(EGLGraphicsConfiguration config, int width, int height, boolean useTexture) {
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) config.getScreen().getDevice();
+        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+        final int texFormat;
+
+        if(useTexture) {
+            texFormat = caps.getAlphaBits() > 0 ? EGL.EGL_TEXTURE_RGBA : EGL.EGL_TEXTURE_RGB ;
+        } else {
+            texFormat = EGL.EGL_NO_TEXTURE;
+        }
+
+        if (DEBUG) {
+          System.out.println("Pbuffer config: " + config);
+        }
+
+        final IntBuffer attrs = EGLGraphicsConfiguration.CreatePBufferSurfaceAttribList(width, height, texFormat);
+        final long surf = EGL.eglCreatePbufferSurface(eglDevice.getHandle(), config.getNativeConfig(), attrs);
+        if (EGL.EGL_NO_SURFACE==surf) {
+            throw new GLException("Creation of window surface (eglCreatePbufferSurface) failed, dim "+width+"x"+height+", "+eglDevice+", "+config+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+        } else if(DEBUG) {
+            System.err.println("PBuffer setSurface result: eglSurface 0x"+Long.toHexString(surf));
+        }
+        return surf;
     }
 
-    protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice adevice, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {    
-        // FIXME device/windowHandle -> screen ?!
-        EGLGraphicsDevice device = (EGLGraphicsDevice) adevice;
-        DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
-        EGLGraphicsConfiguration cfg = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
-        WrappedSurface ns = new WrappedSurface(cfg, windowHandle);
-        return ns;
+    @Override
+    protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+        final EGLGraphicsDevice eglDeviceReq = (EGLGraphicsDevice) deviceReq;
+        final EGLGraphicsDevice device = EGLDisplayUtil.eglCreateEGLGraphicsDevice(eglDeviceReq.getNativeDisplayID(), deviceReq.getConnection(), deviceReq.getUnitID());
+        device.open();
+        final DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, screenIdx);
+        final EGLGraphicsConfiguration cfg = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
+        return new WrappedSurface(cfg, windowHandle, upstream, true);
     }
-    
+
+    @Override
     protected GLContext createExternalGLContextImpl() {
         AbstractGraphicsScreen absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_EGL);
         return new EGLExternalContext(absScreen);
     }
 
+    @Override
     public boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
         return false;
     }
 
+    @Override
     protected GLDrawable createExternalGLDrawableImpl() {
         throw new GLException("Not yet implemented");
     }
-
-    public boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-        return false;
-    }
-
-    public GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-        throws GLException {
-        throw new GLException("Unimplemented on this platform");
-    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java b/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java
new file mode 100644
index 000000000..818f32607
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDummyUpstreamSurfaceHook.java
@@ -0,0 +1,60 @@
+package jogamp.opengl.egl;
+
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+
+import com.jogamp.nativewindow.UpstreamSurfaceHookMutableSize;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+
+/** Uses a PBuffer offscreen surface */
+public class EGLDummyUpstreamSurfaceHook extends UpstreamSurfaceHookMutableSize {
+    /**
+     * @param width the initial width as returned by {@link NativeSurface#getWidth()} via {@link UpstreamSurfaceHook#getWidth(ProxySurface)},
+     *        not the actual dummy surface width.
+     *        The latter is platform specific and small
+     * @param height the initial height as returned by {@link NativeSurface#getHeight()} via {@link UpstreamSurfaceHook#getHeight(ProxySurface)},
+     *        not the actual dummy surface height,
+     *        The latter is platform specific and small
+     */
+    public EGLDummyUpstreamSurfaceHook(int width, int height) {
+        super(width, height);
+    }
+
+    @Override
+    public final void create(ProxySurface s) {
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) s.getGraphicsConfiguration().getScreen().getDevice();
+        eglDevice.lock();
+        try {
+            if(0 == eglDevice.getHandle()) {
+                eglDevice.open();
+                s.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_DEVICE );
+            }
+            if( EGL.EGL_NO_SURFACE == s.getSurfaceHandle() ) {
+                s.setSurfaceHandle( EGLDrawableFactory.createPBufferSurfaceImpl((EGLGraphicsConfiguration)s.getGraphicsConfiguration(), 64, 64, false) );
+                s.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );
+            }
+            s.addUpstreamOptionBits(ProxySurface.OPT_UPSTREAM_WINDOW_INVISIBLE);
+        } finally {
+            eglDevice.unlock();
+        }
+    }
+
+    @Override
+    public final void destroy(ProxySurface s) {
+        if( s.containsUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE ) ) {
+            final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) s.getGraphicsConfiguration().getScreen().getDevice();
+            if( EGL.EGL_NO_SURFACE == s.getSurfaceHandle() ) {
+                throw new InternalError("Owns upstream surface, but no EGL surface: "+s);
+            }
+            eglDevice.lock();
+            try {
+                EGL.eglDestroySurface(eglDevice.getHandle(), s.getSurfaceHandle());
+                s.setSurfaceHandle(EGL.EGL_NO_SURFACE);
+                s.clearUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );
+            } finally {
+                eglDevice.unlock();
+            }
+        }
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java
index fe9d7573d..ebe8f49c8 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,15 +20,16 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.egl;
 
 import com.jogamp.common.os.AndroidVersion;
+import com.jogamp.common.os.Platform;
 
 import java.util.*;
 
@@ -38,10 +39,10 @@ import jogamp.opengl.*;
  * Abstract implementation of the DynamicLookupHelper for EGL,
  * which decouples it's dependencies to EGLDrawable.
  *
- * Currently two implementations exist, one for ES1 and one for ES2.
+ * Currently two implementations exist, one for ES1 and one for ES3 and ES2.
  */
 public abstract class EGLDynamicLibraryBundleInfo extends GLDynamicLibraryBundleInfo {
-    static List<String> glueLibNames;
+    static final List<String> glueLibNames;
     static {
         glueLibNames = new ArrayList<String>();
         glueLibNames.add("jogl_mobile");
@@ -51,27 +52,23 @@ public abstract class EGLDynamicLibraryBundleInfo extends GLDynamicLibraryBundle
         super();
     }
 
-    /** 
-     * Might be a desktop GL library, and might need to allow symbol access to subsequent libs.
-     * 
-     * This respects old DRI requirements:<br>
-     * <pre>
-     * http://dri.sourceforge.net/doc/DRIuserguide.html
-     * </pre>
+    /**
+     * Returns <code>true</code> on <code>Android</code>,
+     * and <code>false</code> otherwise.
+     * <p>
+     * {@inheritDoc}
+     * </p>
      */
     @Override
-    public boolean shallLinkGlobal() { return true; }
-    
-    @Override
-    public boolean shallLookupGlobal() {
-        if ( AndroidVersion.isAvailable ) {
+    public final boolean shallLookupGlobal() {
+        if ( Platform.OSType.ANDROID == Platform.OS_TYPE ) {
             // Android requires global symbol lookup
             return true;
         }
         // default behavior for other platforms
         return false;
     }
-    
+
     @Override
     public final List<String> getToolGetProcAddressFuncNameList() {
         List<String> res = new ArrayList<String>();
@@ -93,26 +90,26 @@ public abstract class EGLDynamicLibraryBundleInfo extends GLDynamicLibraryBundle
             return true;
         }
     }
-    
-    protected List<String> getEGLLibNamesList() {
+
+    protected final List<String> getEGLLibNamesList() {
         List<String> eglLibNames = new ArrayList<String>();
-        
-        // this is the default EGL lib name, according to the spec 
+
+        // this is the default EGL lib name, according to the spec
         eglLibNames.add("libEGL.so.1");
-        
+
         // try these as well, if spec fails
         eglLibNames.add("libEGL.so");
         eglLibNames.add("EGL");
-        
-        // for windows distributions using the 'unlike' lib prefix, 
+
+        // for windows distributions using the 'unlike' lib prefix,
         // where our tool does not add it.
         eglLibNames.add("libEGL");
-        
+
         return eglLibNames;
     }
 
     @Override
     public final List<String> getGlueLibNames() {
         return glueLibNames;
-    }    
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java
index 0a373eb7f..361ec26ff 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,48 +20,49 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.egl;
 
 import java.util.*;
 
-public class EGLES1DynamicLibraryBundleInfo extends EGLDynamicLibraryBundleInfo {
+public final class EGLES1DynamicLibraryBundleInfo extends EGLDynamicLibraryBundleInfo {
     protected EGLES1DynamicLibraryBundleInfo() {
         super();
     }
 
-    public List<List<String>> getToolLibNames() {
+    @Override
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         {
             final List<String> libsGL = new ArrayList<String>();
-            
-            // this is the default lib name, according to the spec 
+
+            // this is the default lib name, according to the spec
             libsGL.add("libGLESv1_CM.so.2");
-            
+
             // try these as well, if spec fails
             libsGL.add("libGLESv1_CM.so");
-            libsGL.add("GLESv1_CM");            
+            libsGL.add("GLESv1_CM");
 
             // alternative names
             libsGL.add("GLES_CM");
             libsGL.add("GLES_CL");
-            
-            // for windows distributions using the 'unlike' lib prefix, 
+
+            // for windows distributions using the 'unlike' lib prefix,
             // where our tool does not add it.
             libsGL.add("libGLESv1_CM");
             libsGL.add("libGLES_CM");
             libsGL.add("libGLES_CL");
-            
+
             libsList.add(libsGL);
         }
         libsList.add(getEGLLibNamesList());
-        
+
         return libsList;
-    }    
+    }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java
index d4ee852b1..74738463f 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,49 +20,70 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.egl;
 
 import java.util.*;
 
-public class EGLES2DynamicLibraryBundleInfo extends EGLDynamicLibraryBundleInfo {
+/**
+ * <p>
+ * Covering ES3 and ES2.
+ * </p>
+ */
+public final class EGLES2DynamicLibraryBundleInfo extends EGLDynamicLibraryBundleInfo {
     protected EGLES2DynamicLibraryBundleInfo() {
         super();
     }
 
-    public List<List<String>> getToolLibNames() {
+    @Override
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         {
             final List<String> libsGL = new ArrayList<String>();
-            
-            // this is the default lib name, according to the spec 
+
+            // ES3: This is the default lib name, according to the spec
+            libsGL.add("libGLESv3.so.3");
+
+            // ES3: Try these as well, if spec fails
+            libsGL.add("libGLESv3.so");
+            libsGL.add("GLESv3");
+
+            // ES3: Alternative names
+            libsGL.add("GLES30");
+
+            // ES3: For windows distributions using the 'unlike' lib prefix
+            // where our tool does not add it.
+            libsGL.add("libGLESv3");
+            libsGL.add("libGLES30");
+
+            // ES2: This is the default lib name, according to the spec
             libsGL.add("libGLESv2.so.2");
-            
-            // try these as well, if spec fails
-            libsGL.add("libGLESv2.so");            
+
+            // ES2: Try these as well, if spec fails
+            libsGL.add("libGLESv2.so");
             libsGL.add("GLESv2");
 
-            // alternative names
+            // ES2: Alternative names
             libsGL.add("GLES20");
             libsGL.add("GLESv2_CM");
 
-            // for windows distributions using the 'unlike' lib prefix
+            // ES2: For windows distributions using the 'unlike' lib prefix
             // where our tool does not add it.
             libsGL.add("libGLESv2");
             libsGL.add("libGLESv2_CM");
-            libsGL.add("libGLES20"); 
-    
+            libsGL.add("libGLES20");
+
             libsList.add(libsGL);
         }
         libsList.add(getEGLLibNamesList());
-        
+
         return libsList;
-    }    
-    
+    }
+
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLExternalContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLExternalContext.java
index ff60a5262..aff18fc81 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLExternalContext.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLExternalContext.java
@@ -1,21 +1,21 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -28,7 +28,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -36,51 +36,27 @@
 package jogamp.opengl.egl;
 
 import javax.media.opengl.*;
+
 import jogamp.opengl.*;
+
 import javax.media.nativewindow.*;
 
 public class EGLExternalContext extends EGLContext {
-    private GLContext lastContext;
 
     public EGLExternalContext(AbstractGraphicsScreen screen) {
         super(null, null);
         GLContextShareSet.contextCreated(this);
-        setGLFunctionAvailability(false, 0, 0, CTX_IS_ARB_CREATED|CTX_PROFILE_ES);
-        getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
-    }
-
-    public int makeCurrent() throws GLException {
-        // Save last context if necessary to allow external GLContexts to
-        // talk to other GLContexts created by this library
-        GLContext cur = getCurrent();
-        if (cur != null && cur != this) {
-            lastContext = cur;
-            setCurrent(null);
+        if( !setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_ES, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+            throw new InternalError("setGLFunctionAvailability !strictMatch failed");
         }
-        return super.makeCurrent();
-    }  
-
-    public void release() throws GLException {
-        super.release();
-        setCurrent(lastContext);
-        lastContext = null;
-    }
-
-    protected void makeCurrentImpl() throws GLException {
+        getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
     }
 
+    @Override
     protected void releaseImpl() throws GLException {
     }
 
+    @Override
     protected void destroyImpl() throws GLException {
     }
-
-    public void bindPbufferToTexture() {
-        throw new GLException("Should not call this");
-    }
-
-    public void releasePbufferFromTexture() {
-        throw new GLException("Should not call this");
-    }
-
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java b/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java
index f813edf86..e28b53235 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java
@@ -33,39 +33,43 @@ import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+
 
 public class EGLGLCapabilities extends GLCapabilities {
   private long eglcfg;
   final private int  eglcfgid;
-  final private int  renderableType;  
+  final private int  renderableType;
   final private int  nativeVisualID;
-  
+
   /**
-   * 
+   *
    * @param eglcfg
    * @param eglcfgid
    * @param visualID native visualID if valid, otherwise VisualIDHolder.VID_UNDEFINED
-   * @param glp desired GLProfile, or null if determined by renderableType
+   * @param glp desired GLProfile
    * @param renderableType actual EGL renderableType
-   * 
+   *
    * May throw GLException if given GLProfile is not compatible w/ renderableType
    */
   public EGLGLCapabilities(long eglcfg, int eglcfgid, int visualID, GLProfile glp, int renderableType) {
-      super( ( null != glp ) ? glp : getCompatible(renderableType) );
+      super( glp );
       this.eglcfg = eglcfg;
       this.eglcfgid = eglcfgid;
       if(!isCompatible(glp, renderableType)) {
-          throw new GLException("Incompatible "+glp+
-                                " with EGL-RenderableType["+renderableTypeToString(null, renderableType)+"]");
+          throw new GLException("Requested GLProfile "+glp+
+                                " not compatible with EGL-RenderableType["+renderableTypeToString(null, renderableType)+"]");
       }
       this.renderableType = renderableType;
       this.nativeVisualID = visualID;
   }
 
+  @Override
   public Object cloneMutable() {
     return clone();
   }
 
+  @Override
   public Object clone() {
     try {
       return super.clone();
@@ -73,13 +77,13 @@ public class EGLGLCapabilities extends GLCapabilities {
       throw new GLException(e);
     }
   }
-  
+
   final protected void setEGLConfig(long v) { eglcfg=v; }
   final public long getEGLConfig() { return eglcfg; }
   final public int getEGLConfigID() { return eglcfgid; }
   final public int getRenderableType() { return renderableType; }
   final public int getNativeVisualID() { return nativeVisualID; }
-  
+
   @Override
   final public int getVisualID(VIDType type) throws NativeWindowException {
       switch(type) {
@@ -90,43 +94,50 @@ public class EGLGLCapabilities extends GLCapabilities {
               return getNativeVisualID();
           default:
               throw new NativeWindowException("Invalid type <"+type+">");
-      }      
+      }
   }
-  
+
   public static boolean isCompatible(GLProfile glp, int renderableType) {
     if(null == glp) {
         return true;
     }
-    if(0 != (renderableType & EGL.EGL_OPENGL_ES_BIT) && glp.usesNativeGLES1()) {
+    if(0 != (renderableType & EGLExt.EGL_OPENGL_ES3_BIT_KHR) && glp.usesNativeGLES3()) {
         return true;
     }
     if(0 != (renderableType & EGL.EGL_OPENGL_ES2_BIT) && glp.usesNativeGLES2()) {
         return true;
     }
+    if(0 != (renderableType & EGL.EGL_OPENGL_ES_BIT) && glp.usesNativeGLES1()) {
+        return true;
+    }
     if(0 != (renderableType & EGL.EGL_OPENGL_BIT) && !glp.usesNativeGLES()) {
         return true;
     }
     return false;
   }
 
-  public static GLProfile getCompatible(int renderableType) {
-    if(0 != (renderableType & EGL.EGL_OPENGL_ES2_BIT) && GLProfile.isAvailable(GLProfile.GLES2)) {
-        return GLProfile.get(GLProfile.GLES2);
+  public static GLProfile getCompatible(EGLGraphicsDevice device, int renderableType) {
+    if(0 != (renderableType & EGLExt.EGL_OPENGL_ES3_BIT_KHR) && GLProfile.isAvailable(device, GLProfile.GLES3)) {
+        return GLProfile.get(device, GLProfile.GLES3);
+    }
+    if(0 != (renderableType & EGL.EGL_OPENGL_ES2_BIT) && GLProfile.isAvailable(device, GLProfile.GLES2)) {
+        return GLProfile.get(device, GLProfile.GLES2);
     }
-    if(0 != (renderableType & EGL.EGL_OPENGL_ES_BIT) && GLProfile.isAvailable(GLProfile.GLES1)) {
-        return GLProfile.get(GLProfile.GLES1);
+    if(0 != (renderableType & EGL.EGL_OPENGL_ES_BIT) && GLProfile.isAvailable(device, GLProfile.GLES1)) {
+        return GLProfile.get(device, GLProfile.GLES1);
     }
     if(0 != (renderableType & EGL.EGL_OPENGL_BIT)) {
-        return GLProfile.getDefault();
+        return GLProfile.getDefault(device);
     }
     return null;
   }
-  
+
   public static StringBuilder renderableTypeToString(StringBuilder sink, int renderableType) {
     if(null == sink) {
         sink = new StringBuilder();
     }
     boolean first=true;
+    sink.append("0x").append(Integer.toHexString(renderableType)).append(": ");
     if(0 != (renderableType & EGL.EGL_OPENGL_BIT)) {
         sink.append("GL"); first=false;
     }
@@ -136,12 +147,16 @@ public class EGLGLCapabilities extends GLCapabilities {
     if(0 != (renderableType & EGL.EGL_OPENGL_ES2_BIT)) {
         if(!first) sink.append(", "); sink.append("GLES2");  first=false;
     }
+    if(0 != (renderableType & EGLExt.EGL_OPENGL_ES3_BIT_KHR)) {
+        if(!first) sink.append(", "); sink.append("GLES3");  first=false;
+    }
     if(0 != (renderableType & EGL.EGL_OPENVG_API)) {
         if(!first) sink.append(", "); sink.append("VG");  first=false;
     }
-    return sink;      
+    return sink;
   }
-  
+
+  @Override
   public StringBuilder toString(StringBuilder sink) {
     if(null == sink) {
         sink = new StringBuilder();
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java
index 875bcb95b..88ed0be92 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,7 +29,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -37,15 +37,16 @@
 package jogamp.opengl.egl;
 
 import java.nio.IntBuffer;
-import java.util.ArrayList;
 
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
+import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.nativewindow.VisualIDHolder;
 import javax.media.opengl.DefaultGLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
@@ -55,9 +56,14 @@ import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+import com.jogamp.opengl.GLRendererQuirks;
 
 public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration implements Cloneable {
-    
+
+    private static final String dbgCfgFailIntro = "Info: EGLConfig could not retrieve ";
+    private static final String dbgCfgFailForConfig = " for config ";
+    private static final String dbgCfgFailError = ", error ";
+
     public final long getNativeConfig() {
         return ((EGLGLCapabilities)capabilitiesChosen).getEGLConfig();
     }
@@ -66,13 +72,20 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
         return ((EGLGLCapabilities)capabilitiesChosen).getEGLConfigID();
     }
 
-    EGLGraphicsConfiguration(AbstractGraphicsScreen absScreen, 
+    EGLGraphicsConfiguration(AbstractGraphicsScreen absScreen,
                              EGLGLCapabilities capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
         super(absScreen, capsChosen, capsRequested);
         this.chooser = chooser;
     }
 
-    public static EGLGraphicsConfiguration create(GLCapabilitiesImmutable capsRequested, AbstractGraphicsScreen absScreen, int cfgID) {
+    /**
+     * @param capsRequested
+     * @param absScreen
+     * @param eglConfigID {@link EGL#EGL_CONFIG_ID} for which the config is being created for.
+     * @return
+     * @throws GLException if invalid EGL display.
+     */
+    public static EGLGraphicsConfiguration create(GLCapabilitiesImmutable capsRequested, AbstractGraphicsScreen absScreen, int eglConfigID) {
         final AbstractGraphicsDevice absDevice = absScreen.getDevice();
         if(null==absDevice || !(absDevice instanceof EGLGraphicsDevice)) {
             throw new GLException("GraphicsDevice must be a valid EGLGraphicsDevice");
@@ -81,9 +94,11 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
         if (dpy == EGL.EGL_NO_DISPLAY) {
             throw new GLException("Invalid EGL display: "+absDevice);
         }
-        final long cfg = EGLConfigId2EGLConfig(dpy, cfgID);
+        final long cfg = EGLConfigId2EGLConfig(dpy, eglConfigID);
         if(0 < cfg) {
-            final EGLGLCapabilities caps = EGLConfig2Capabilities(capsRequested.getGLProfile(), dpy, cfg, false, capsRequested.isOnscreen(), capsRequested.isPBuffer(), false);
+            final GLRendererQuirks defaultQuirks = GLRendererQuirks.getStickyDeviceQuirks( GLDrawableFactory.getEGLFactory().getDefaultDevice() );
+            final int winattrmask = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(capsRequested);
+            final EGLGLCapabilities caps = EGLConfig2Capabilities(defaultQuirks, (EGLGraphicsDevice)absDevice, capsRequested.getGLProfile(), cfg, winattrmask, false);
             return new EGLGraphicsConfiguration(absScreen, caps, capsRequested, new DefaultGLCapabilitiesChooser());
         }
         return null;
@@ -93,11 +108,12 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
     public Object clone() {
         return super.clone();
     }
-        
+
     void updateGraphicsConfiguration() {
+        CapabilitiesImmutable capsChosen = getChosenCapabilities();
         EGLGraphicsConfiguration newConfig = (EGLGraphicsConfiguration)
-            GraphicsConfigurationFactory.getFactory(getScreen().getDevice()).chooseGraphicsConfiguration(
-                getChosenCapabilities(), getRequestedCapabilities(), chooser, getScreen());
+            GraphicsConfigurationFactory.getFactory(getScreen().getDevice(), capsChosen).chooseGraphicsConfiguration(
+                capsChosen, getRequestedCapabilities(), chooser, getScreen(), VisualIDHolder.VID_UNDEFINED);
         if(null!=newConfig) {
             // FIXME: setScreen( ... );
             setChosenCapabilities(newConfig.getChosenCapabilities());
@@ -108,260 +124,379 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
     }
 
     public static long EGLConfigId2EGLConfig(long display, int configID) {
-        int[] attrs = new int[] {
+        final IntBuffer attrs = Buffers.newDirectIntBuffer(new int[] {
                 EGL.EGL_CONFIG_ID, configID,
                 EGL.EGL_NONE
-            };
-        PointerBuffer configs = PointerBuffer.allocateDirect(1);
-        int[] numConfigs = new int[1];
+            });
+        final PointerBuffer configs = PointerBuffer.allocateDirect(1);
+        final IntBuffer numConfigs = Buffers.newDirectIntBuffer(1);
         if (!EGL.eglChooseConfig(display,
-                                 attrs, 0,
+                                 attrs,
                                  configs, 1,
-                                 numConfigs, 0)) {
+                                 numConfigs)) {
             return 0;
         }
-        if (numConfigs[0] == 0) {
+        if (numConfigs.get(0) == 0) {
             return 0;
         }
         return configs.get(0);
     }
 
-    static int EGLConfigDrawableTypeBits(final long display, final long config) {
+    public static boolean isEGLConfigValid(long display, long config) {
+        if(0 == config) {
+            return false;
+        }
+        final IntBuffer val = Buffers.newDirectIntBuffer(1);
+
+        // get the configID
+        if(!EGL.eglGetConfigAttrib(display, config, EGL.EGL_CONFIG_ID, val)) {
+            final int eglErr = EGL.eglGetError();
+            if(DEBUG) {
+                System.err.println(dbgCfgFailIntro+"EGL_CONFIG_ID"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(eglErr));
+            }
+            return false;
+        }
+        return true;
+    }
+
+    static int EGLConfigDrawableTypeBits(final EGLGraphicsDevice device, final long config) {
         int val = 0;
 
-        int[] stype = new int[1];
-        if(! EGL.eglGetConfigAttrib(display, config, EGL.EGL_SURFACE_TYPE, stype, 0)) {
+        final IntBuffer stype = Buffers.newDirectIntBuffer(1);
+        if(! EGL.eglGetConfigAttrib(device.getHandle(), config, EGL.EGL_SURFACE_TYPE, stype)) {
             throw new GLException("Could not determine EGL_SURFACE_TYPE");
         }
 
-        if ( 0 != ( stype[0] & EGL.EGL_WINDOW_BIT ) ) {
+        final int _stype = stype.get(0);
+        if ( 0 != ( _stype & EGL.EGL_WINDOW_BIT ) ) {
             val |= GLGraphicsConfigurationUtil.WINDOW_BIT;
         }
-        if ( 0 != ( stype[0] & EGL.EGL_PIXMAP_BIT ) ) {
+        if ( 0 != ( _stype & EGL.EGL_PIXMAP_BIT ) ) {
             val |= GLGraphicsConfigurationUtil.BITMAP_BIT;
         }
-        if ( 0 != ( stype[0] & EGL.EGL_PBUFFER_BIT ) ) {
-            val |= GLGraphicsConfigurationUtil.PBUFFER_BIT;
+        if ( 0 != ( _stype & EGL.EGL_PBUFFER_BIT ) ) {
+            val |= GLGraphicsConfigurationUtil.PBUFFER_BIT |
+                   GLGraphicsConfigurationUtil.FBO_BIT;
         }
-
         return val;
     }
 
-    public static EGLGLCapabilities EGLConfig2Capabilities(GLProfile glp, long display, long config,
-                                                           boolean relaxed, boolean onscreen, boolean usePBuffer, boolean forceTransparentFlag) {
-        ArrayList bucket = new ArrayList();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-        if( EGLConfig2Capabilities(bucket, glp, display, config, winattrmask, forceTransparentFlag) ) {
-            return (EGLGLCapabilities) bucket.get(0);
-        } else if ( relaxed && EGLConfig2Capabilities(bucket, glp, display, config, GLGraphicsConfigurationUtil.ALL_BITS, forceTransparentFlag) ) {
-            return (EGLGLCapabilities) bucket.get(0);
-        }
-        return null;
-    }
-
-    public static boolean EGLConfig2Capabilities(ArrayList capsBucket,
-                                                 GLProfile glp, long display, long config,
-                                                 int winattrmask, boolean forceTransparentFlag) {
-        final int allDrawableTypeBits = EGLConfigDrawableTypeBits(display, config);
-        final int drawableTypeBits = winattrmask & allDrawableTypeBits;
-
-        if( 0 == drawableTypeBits ) {
-            return false;
-        }
-
-        final IntBuffer val = Buffers.newDirectIntBuffer(1);
+    /**
+     * @param defaultQuirks GLRendererQuirks of the EGLDrawableFactory's defaultDevice
+     * @param device
+     * @param glp desired GLProfile, may be null
+     * @param config
+     * @param winattrmask
+     * @param forceTransparentFlag
+     * @return
+     */
+    public static EGLGLCapabilities EGLConfig2Capabilities(GLRendererQuirks defaultQuirks, EGLGraphicsDevice device, GLProfile glp,
+                                                           long config, int winattrmask, boolean forceTransparentFlag) {
+        final long display = device.getHandle();
         final int cfgID;
         final int rType;
         final int visualID;
-        
+
+        final int _attributes[] = {
+            EGL.EGL_CONFIG_ID,                 // 0
+            EGL.EGL_RENDERABLE_TYPE,
+            EGL.EGL_NATIVE_VISUAL_ID,
+            EGL.EGL_CONFIG_CAVEAT,
+            EGL.EGL_RED_SIZE,                  // 4
+            EGL.EGL_GREEN_SIZE,
+            EGL.EGL_BLUE_SIZE,
+            EGL.EGL_ALPHA_SIZE,                // 7
+            EGL.EGL_STENCIL_SIZE,              // 8
+            EGL.EGL_DEPTH_SIZE,
+            EGL.EGL_TRANSPARENT_TYPE,          // 10
+            EGL.EGL_TRANSPARENT_RED_VALUE,
+            EGL.EGL_TRANSPARENT_GREEN_VALUE,
+            EGL.EGL_TRANSPARENT_BLUE_VALUE,
+            EGL.EGL_SAMPLES,                   // 14
+            EGLExt.EGL_COVERAGE_BUFFERS_NV,    // 15
+            EGLExt.EGL_COVERAGE_SAMPLES_NV
+        };
+        final IntBuffer attributes = Buffers.newDirectIntBuffer(_attributes);
+        final IntBuffer values = Buffers.newDirectIntBuffer(attributes.remaining());
+        EGL.eglGetConfigAttributes(display, config, attributes, values);
+
         // get the configID
-        if(!EGL.eglGetConfigAttrib(display, config, EGL.EGL_CONFIG_ID, val)) {
+        if( EGL.EGL_CONFIG_ID != attributes.get(0) ) {
             if(DEBUG) {
                 // FIXME: this happens on a ATI PC Emulation ..
-                System.err.println("EGL couldn't retrieve ConfigID for config "+toHexString(config)+", error "+toHexString(EGL.eglGetError()));
+                System.err.println(dbgCfgFailIntro+"ConfigID"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
             }
-            return false;
+            return null;
         }
-        cfgID = val.get(0);
-        
-        if(!EGL.eglGetConfigAttrib(display, config, EGL.EGL_RENDERABLE_TYPE, val)) {
+        cfgID = values.get(0);
+
+        if( EGL.EGL_RENDERABLE_TYPE != attributes.get(1) ) {
             if(DEBUG) {
-                System.err.println("EGL couldn't retrieve EGL_RENDERABLE_TYPE for config "+toHexString(config)+", error "+toHexString(EGL.eglGetError()));
+                System.err.println(dbgCfgFailIntro+"EGL_RENDERABLE_TYPE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
             }
-            return false;
+            return null;
         }
-        rType = val.get(0);
-                       
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_NATIVE_VISUAL_ID, val)) {
-            visualID = val.get(0);
+        {
+            final int rTypeOrig = values.get(1);
+            if( defaultQuirks.exist(GLRendererQuirks.GLES3ViaEGLES2Config) && 0 != ( EGL.EGL_OPENGL_ES2_BIT & rTypeOrig ) ) {
+                rType = rTypeOrig | EGLExt.EGL_OPENGL_ES3_BIT_KHR;
+            } else {
+                rType = rTypeOrig;
+            }
+        }
+
+        if( EGL.EGL_NATIVE_VISUAL_ID == attributes.get(2) ) {
+            visualID = values.get(2);
         } else {
+            if(DEBUG) {
+                System.err.println(dbgCfgFailIntro+"EGL_NATIVE_VISUAL_ID"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
+            }
             visualID = VisualIDHolder.VID_UNDEFINED;
         }
-        
-        EGLGLCapabilities caps = null;        
+
+        EGLGLCapabilities caps = null;
         try {
+            if(null == glp) {
+                glp = EGLGLCapabilities.getCompatible(device, rType);
+            }
+            if(!EGLGLCapabilities.isCompatible(glp, rType)) {
+                if(DEBUG) {
+                    System.err.println("config "+toHexString(config)+": Requested GLProfile "+glp+
+                                " with quirks "+defaultQuirks+" not compatible with EGL-RenderableType["+EGLGLCapabilities.renderableTypeToString(null, rType)+"]");
+                }
+                return null;
+            }
             caps = new EGLGLCapabilities(config, cfgID, visualID, glp, rType);
         } catch (GLException gle) {
             if(DEBUG) {
                 System.err.println("config "+toHexString(config)+": "+gle);
             }
-            return false;
-        }        
-                
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_RED_SIZE, val)) {
-            caps.setRedBits(val.get(0));
+            return null;
         }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_GREEN_SIZE, val)) {
-            caps.setGreenBits(val.get(0));
+
+        if( EGL.EGL_CONFIG_CAVEAT == attributes.get(3) ) {
+            if( EGL.EGL_SLOW_CONFIG == values.get(3) ) {
+                caps.setHardwareAccelerated(false);
+            }
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_CONFIG_CAVEAT"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_BLUE_SIZE, val)) {
-            caps.setBlueBits(val.get(0));
+        // ALPHA shall be set at last - due to it's auto setting by the above (!opaque / samples)
+        if( EGL.EGL_RED_SIZE == attributes.get(4) ) {
+            caps.setRedBits(values.get(4));
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_RED_SIZE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_ALPHA_SIZE, val)) {
-            caps.setAlphaBits(val.get(0));
+        if( EGL.EGL_GREEN_SIZE == attributes.get(5) ) {
+            caps.setGreenBits(values.get(5));
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_GREEN_SIZE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_STENCIL_SIZE, val)) {
-            caps.setStencilBits(val.get(0));
+        if( EGL.EGL_BLUE_SIZE == attributes.get(6) ) {
+            caps.setBlueBits(values.get(6));
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_BLUE_SIZE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_DEPTH_SIZE, val)) {
-            caps.setDepthBits(val.get(0));
+        if( EGL.EGL_ALPHA_SIZE == attributes.get(7) ) {
+            caps.setAlphaBits(values.get(7));
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_ALPHA_SIZE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_SAMPLES, val)) {
-            caps.setSampleBuffers(val.get(0)>0?true:false);
-            caps.setNumSamples(val.get(0));
+        if( EGL.EGL_STENCIL_SIZE == attributes.get(8) ) {
+            caps.setStencilBits(values.get(8));
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_STENCIL_SIZE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(!caps.getSampleBuffers()) {
-            // try NV_coverage_sample extension 
-            if(EGL.eglGetConfigAttrib(display, config, EGLExt.EGL_COVERAGE_BUFFERS_NV, val)) {
-                if(val.get(0)>0 &&
-                   EGL.eglGetConfigAttrib(display, config, EGLExt.EGL_COVERAGE_SAMPLES_NV, val)) {
-                    caps.setSampleExtension(GLGraphicsConfigurationUtil.NV_coverage_sample); 
-                    caps.setSampleBuffers(true);
-                    caps.setNumSamples(val.get(0));
-                }
-            }
+        if( EGL.EGL_DEPTH_SIZE == attributes.get(9) ) {
+            caps.setDepthBits(values.get(9));
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_DEPTH_SIZE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
-        if(forceTransparentFlag) {
+        if( forceTransparentFlag ) {
             caps.setBackgroundOpaque(false);
-        } else if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_TRANSPARENT_TYPE, val)) {
-            caps.setBackgroundOpaque(val.get(0) != EGL.EGL_TRANSPARENT_RGB);
+        } else if( EGL.EGL_TRANSPARENT_TYPE == attributes.get(10) ) {
+            caps.setBackgroundOpaque(values.get(10) != EGL.EGL_TRANSPARENT_RGB);
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_TRANSPARENT_TYPE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
         }
         if(!caps.isBackgroundOpaque()) {
-            if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_TRANSPARENT_RED_VALUE, val)) {
-                caps.setTransparentRedValue(val.get(0)==EGL.EGL_DONT_CARE?-1:val.get(0));
+            if( EGL.EGL_TRANSPARENT_RED_VALUE == attributes.get(11) ) {
+                final int v = values.get(11);
+                caps.setTransparentRedValue(EGL.EGL_DONT_CARE==v?-1:v);
+            } else if(DEBUG) {
+                System.err.println(dbgCfgFailIntro+"EGL_TRANSPARENT_RED_VALUE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
             }
-            if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_TRANSPARENT_GREEN_VALUE, val)) {
-                caps.setTransparentGreenValue(val.get(0)==EGL.EGL_DONT_CARE?-1:val.get(0));
+            if( EGL.EGL_TRANSPARENT_GREEN_VALUE == attributes.get(12) ) {
+                final int v = values.get(12);
+                caps.setTransparentGreenValue(EGL.EGL_DONT_CARE==v?-1:v);
+            } else if(DEBUG) {
+                System.err.println(dbgCfgFailIntro+"EGL_TRANSPARENT_GREEN_VALUE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
             }
-            if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_TRANSPARENT_BLUE_VALUE, val)) {
-                caps.setTransparentBlueValue(val.get(0)==EGL.EGL_DONT_CARE?-1:val.get(0));
+            if( EGL.EGL_TRANSPARENT_BLUE_VALUE == attributes.get(13) ) {
+                final int v = values.get(13);
+                caps.setTransparentBlueValue(EGL.EGL_DONT_CARE==v?-1:v);
+            } else if(DEBUG) {
+                System.err.println(dbgCfgFailIntro+"EGL_TRANSPARENT_BLUE_VALUE"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
             }
-            /** Not defined in EGL 
-            if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_TRANSPARENT_ALPHA_VALUE, val)) {
-                caps.setTransparentAlphaValue(val.get(0)==EGL.EGL_DONT_CARE?-1:val.get(0));
+            /** Not defined in EGL
+            if( EGL.EGL_TRANSPARENT_ALPHA_VALUE == attributes.get(??) ) {
+                final int v = values.get(??);
+                caps.setTransparentAlphaValue(EGL.EGL_DONT_CARE==v?-1:v);
+            } else if(DEBUG) {
+                System.err.println(dbgStr01+"EGL_TRANSPARENT_ALPHA_VALUE"+dbgStr02+toHexString(config)+dbgEGLCfgFailError+toHexString(EGL.eglGetError()));
             } */
         }
-        return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, caps, drawableTypeBits );
+        if( EGL.EGL_SAMPLES == attributes.get(14) ) {
+            final int numSamples = values.get(14);
+            caps.setSampleBuffers(numSamples>0?true:false);
+            caps.setNumSamples(numSamples);
+        } else if(DEBUG) {
+            System.err.println(dbgCfgFailIntro+"EGL_SAMPLES"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
+        }
+        if(!caps.getSampleBuffers()) {
+            // try NV_coverage_sample extension
+            if( EGLExt.EGL_COVERAGE_BUFFERS_NV == attributes.get(15) ) {
+                final boolean enabled = values.get(15) > 0;
+                if( enabled && EGLExt.EGL_COVERAGE_SAMPLES_NV == attributes.get(16) ) {
+                    caps.setSampleExtension(GLGraphicsConfigurationUtil.NV_coverage_sample);
+                    caps.setSampleBuffers(true);
+                    caps.setNumSamples(values.get(16));
+                } else if(DEBUG) {
+                    System.err.println(dbgCfgFailIntro+"EGL_COVERAGE_SAMPLES_NV"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
+                }
+            } /** else if(DEBUG) { // Not required - vendor extension - don't be verbose!
+                System.err.println(dbgCfgFailIntro+"EGL_COVERAGE_BUFFERS_NV"+dbgCfgFailForConfig+toHexString(config)+dbgCfgFailError+toHexString(EGL.eglGetError()));
+            } */
+        }
+
+        // Since the passed GLProfile may be null,
+        // we use EGL_RENDERABLE_TYPE derived profile as created in the EGLGLCapabilities constructor.
+        final int availableTypeBits = EGLConfigDrawableTypeBits(device, config);
+        final int drawableTypeBits = winattrmask & availableTypeBits;
+
+        if( 0 == drawableTypeBits ) {
+            return null;
+        }
+
+        return (EGLGLCapabilities) GLGraphicsConfigurationUtil.fixWinAttribBitsAndHwAccel(device, drawableTypeBits, caps);
     }
 
-    public static int[] GLCapabilities2AttribList(GLCapabilitiesImmutable caps) {
-        int[] attrs = new int[32];
+    public static IntBuffer GLCapabilities2AttribList(GLCapabilitiesImmutable caps) {
+        final IntBuffer attrs = Buffers.newDirectIntBuffer(32);
         int idx=0;
 
-        attrs[idx++] = EGL.EGL_SURFACE_TYPE;
-        attrs[idx++] = caps.isOnscreen() ? ( EGL.EGL_WINDOW_BIT ) : ( caps.isPBuffer() ? EGL.EGL_PBUFFER_BIT : EGL.EGL_PIXMAP_BIT ) ;
+        attrs.put(idx++, EGL.EGL_SURFACE_TYPE);
+        final int surfaceType;
+        if( caps.isOnscreen() ) {
+            surfaceType = EGL.EGL_WINDOW_BIT;
+        } else if( caps.isFBO() ) {
+            surfaceType = EGL.EGL_PBUFFER_BIT;  // native replacement!
+        } else if( caps.isPBuffer() ) {
+            surfaceType = EGL.EGL_PBUFFER_BIT;
+        } else if( caps.isBitmap() ) {
+            surfaceType = EGL.EGL_PIXMAP_BIT;
+        } else {
+            throw new GLException("no surface type set in caps: "+caps);
+        }
+        attrs.put(idx++, surfaceType);
 
-        attrs[idx++] = EGL.EGL_RED_SIZE;
-        attrs[idx++] = caps.getRedBits();
+        attrs.put(idx++, EGL.EGL_RED_SIZE);
+        attrs.put(idx++, caps.getRedBits());
 
-        attrs[idx++] = EGL.EGL_GREEN_SIZE;
-        attrs[idx++] = caps.getGreenBits();
+        attrs.put(idx++, EGL.EGL_GREEN_SIZE);
+        attrs.put(idx++, caps.getGreenBits());
 
-        attrs[idx++] = EGL.EGL_BLUE_SIZE;
-        attrs[idx++] = caps.getBlueBits();
+        attrs.put(idx++, EGL.EGL_BLUE_SIZE);
+        attrs.put(idx++, caps.getBlueBits());
 
         if(caps.getAlphaBits()>0) {
-            attrs[idx++] = EGL.EGL_ALPHA_SIZE;
-            attrs[idx++] = caps.getAlphaBits();
+            attrs.put(idx++, EGL.EGL_ALPHA_SIZE);
+            attrs.put(idx++, caps.getAlphaBits());
         }
-        
+
         if(caps.getStencilBits()>0) {
-            attrs[idx++] = EGL.EGL_STENCIL_SIZE;
-            attrs[idx++] = caps.getStencilBits();
+            attrs.put(idx++, EGL.EGL_STENCIL_SIZE);
+            attrs.put(idx++, caps.getStencilBits());
         }
 
-        attrs[idx++] = EGL.EGL_DEPTH_SIZE;
-        attrs[idx++] = caps.getDepthBits();
+        attrs.put(idx++, EGL.EGL_DEPTH_SIZE);
+        attrs.put(idx++, caps.getDepthBits());
 
         if(caps.getSampleBuffers()) {
             if(caps.getSampleExtension().equals(GLGraphicsConfigurationUtil.NV_coverage_sample)) {
-                attrs[idx++] = EGLExt.EGL_COVERAGE_BUFFERS_NV;
-                attrs[idx++] = 1;
-                attrs[idx++] = EGLExt.EGL_COVERAGE_SAMPLES_NV;
-                attrs[idx++] = caps.getNumSamples();
+                attrs.put(idx++, EGLExt.EGL_COVERAGE_BUFFERS_NV);
+                attrs.put(idx++, 1);
+                attrs.put(idx++, EGLExt.EGL_COVERAGE_SAMPLES_NV);
+                attrs.put(idx++, caps.getNumSamples());
             } else {
                 // try default ..
-                attrs[idx++] = EGL.EGL_SAMPLE_BUFFERS;
-                attrs[idx++] = 1;
-                attrs[idx++] = EGL.EGL_SAMPLES;
-                attrs[idx++] = caps.getNumSamples();
+                attrs.put(idx++, EGL.EGL_SAMPLE_BUFFERS);
+                attrs.put(idx++, 1);
+                attrs.put(idx++, EGL.EGL_SAMPLES);
+                attrs.put(idx++, caps.getNumSamples());
             }
         }
 
-        attrs[idx++] = EGL.EGL_TRANSPARENT_TYPE;
-        attrs[idx++] = caps.isBackgroundOpaque() ? EGL.EGL_NONE : EGL.EGL_TRANSPARENT_TYPE;
+        attrs.put(idx++, EGL.EGL_TRANSPARENT_TYPE);
+        attrs.put(idx++, caps.isBackgroundOpaque() ? EGL.EGL_NONE : EGL.EGL_TRANSPARENT_TYPE);
 
         // 22
 
         if(!caps.isBackgroundOpaque()) {
-            attrs[idx++] = EGL.EGL_TRANSPARENT_RED_VALUE;
-            attrs[idx++] = caps.getTransparentRedValue()>=0?caps.getTransparentRedValue():EGL.EGL_DONT_CARE;
+            attrs.put(idx++, EGL.EGL_TRANSPARENT_RED_VALUE);
+            attrs.put(idx++, caps.getTransparentRedValue()>=0?caps.getTransparentRedValue():EGL.EGL_DONT_CARE);
 
-            attrs[idx++] = EGL.EGL_TRANSPARENT_GREEN_VALUE;
-            attrs[idx++] = caps.getTransparentGreenValue()>=0?caps.getTransparentGreenValue():EGL.EGL_DONT_CARE;
+            attrs.put(idx++, EGL.EGL_TRANSPARENT_GREEN_VALUE);
+            attrs.put(idx++, caps.getTransparentGreenValue()>=0?caps.getTransparentGreenValue():EGL.EGL_DONT_CARE);
 
-            attrs[idx++] = EGL.EGL_TRANSPARENT_BLUE_VALUE;
-            attrs[idx++] = caps.getTransparentBlueValue()>=0?caps.getTransparentBlueValue():EGL.EGL_DONT_CARE;
+            attrs.put(idx++, EGL.EGL_TRANSPARENT_BLUE_VALUE);
+            attrs.put(idx++, caps.getTransparentBlueValue()>=0?caps.getTransparentBlueValue():EGL.EGL_DONT_CARE);
 
             /** Not define in EGL
-            attrs[idx++] = EGL.EGL_TRANSPARENT_ALPHA_VALUE;
-            attrs[idx++] = caps.getTransparentAlphaValue()>=0?caps.getTransparentAlphaValue():EGL.EGL_DONT_CARE; */
+            attrs.put(idx++, EGL.EGL_TRANSPARENT_ALPHA_VALUE;
+            attrs.put(idx++, caps.getTransparentAlphaValue()>=0?caps.getTransparentAlphaValue():EGL.EGL_DONT_CARE; */
         }
 
-        // 28 
-        attrs[idx++] = EGL.EGL_RENDERABLE_TYPE;
+        // 28
+        attrs.put(idx++, EGL.EGL_RENDERABLE_TYPE);
         if(caps.getGLProfile().usesNativeGLES1()) {
-            attrs[idx++] = EGL.EGL_OPENGL_ES_BIT;
+            attrs.put(idx++, EGL.EGL_OPENGL_ES_BIT);
         } else if(caps.getGLProfile().usesNativeGLES2()) {
-            attrs[idx++] = EGL.EGL_OPENGL_ES2_BIT;
+            attrs.put(idx++, EGL.EGL_OPENGL_ES2_BIT);
+        } else if(caps.getGLProfile().usesNativeGLES3()) {
+            if( GLRendererQuirks.existStickyDeviceQuirk(GLDrawableFactory.getEGLFactory().getDefaultDevice(), GLRendererQuirks.GLES3ViaEGLES2Config) ) {
+                attrs.put(idx++, EGL.EGL_OPENGL_ES2_BIT);
+            } else {
+                attrs.put(idx++, EGLExt.EGL_OPENGL_ES3_BIT_KHR);
+            }
         } else {
-            attrs[idx++] = EGL.EGL_OPENGL_BIT;
+            attrs.put(idx++, EGL.EGL_OPENGL_BIT);
         }
 
         // 30
 
-        attrs[idx++] = EGL.EGL_NONE;
+        attrs.put(idx++, EGL.EGL_NONE);
 
         return attrs;
     }
 
-    public static int[] CreatePBufferSurfaceAttribList(int width, int height, int texFormat) {
-        int[] attrs = new int[16];
+    public static IntBuffer CreatePBufferSurfaceAttribList(int width, int height, int texFormat) {
+        IntBuffer attrs = Buffers.newDirectIntBuffer(16);
         int idx=0;
 
-        attrs[idx++] = EGL.EGL_WIDTH;
-        attrs[idx++] = width;
+        attrs.put(idx++, EGL.EGL_WIDTH);
+        attrs.put(idx++, width);
 
-        attrs[idx++] = EGL.EGL_HEIGHT;
-        attrs[idx++] = height;
+        attrs.put(idx++, EGL.EGL_HEIGHT);
+        attrs.put(idx++, height);
 
-        attrs[idx++] = EGL.EGL_TEXTURE_FORMAT;
-        attrs[idx++] = texFormat;
+        attrs.put(idx++, EGL.EGL_TEXTURE_FORMAT);
+        attrs.put(idx++, texFormat);
 
-        attrs[idx++] = EGL.EGL_TEXTURE_TARGET;
-        attrs[idx++] = EGL.EGL_NO_TEXTURE==texFormat ? EGL.EGL_NO_TEXTURE : EGL.EGL_TEXTURE_2D;
+        attrs.put(idx++, EGL.EGL_TEXTURE_TARGET);
+        attrs.put(idx++, EGL.EGL_NO_TEXTURE==texFormat ? EGL.EGL_NO_TEXTURE : EGL.EGL_TEXTURE_2D);
 
-        attrs[idx++] = EGL.EGL_NONE;
+        attrs.put(idx++, EGL.EGL_NONE);
 
         return attrs;
     }
@@ -376,6 +511,6 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
 
     }
 
-    private GLCapabilitiesChooser chooser;
+    private final GLCapabilitiesChooser chooser;
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java
index 904110eb2..5cfa378cb 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -38,15 +38,14 @@ import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
-import javax.media.nativewindow.DefaultGraphicsScreen;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.nativewindow.VisualIDHolder;
 import javax.media.nativewindow.VisualIDHolder.VIDType;
 import javax.media.nativewindow.NativeWindowFactory;
-
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.GLDrawableFactory;
@@ -54,6 +53,7 @@ import javax.media.opengl.GLDrawableFactory;
 import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+import com.jogamp.opengl.GLRendererQuirks;
 
 import jogamp.opengl.GLGraphicsConfigurationFactory;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
@@ -74,43 +74,51 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
     static VisualIDHolder.VIDComparator EglCfgIDComparator = new VisualIDHolder.VIDComparator(VisualIDHolder.VIDType.EGL_CONFIG);
     static GraphicsConfigurationFactory nativeGraphicsConfigurationFactory = null;
     static GraphicsConfigurationFactory kdeglGraphicsConfigurationFactory = null;
-    
+    static GraphicsConfigurationFactory fallbackGraphicsConfigurationFactory = null;
+
     static void registerFactory() {
         GraphicsConfigurationFactory eglFactory = new EGLGraphicsConfigurationFactory();
-        
+
         // become the pre-selector for X11/.. to match the native visual id w/ EGL, if native ES is selected
         final String nwType = NativeWindowFactory.getNativeWindowType(false);
         if(NativeWindowFactory.TYPE_X11 == nwType) {
-            nativeGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, eglFactory);
+            nativeGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, GLCapabilitiesImmutable.class, eglFactory);
+            if(null != nativeGraphicsConfigurationFactory) {
+                fallbackGraphicsConfigurationFactory = nativeGraphicsConfigurationFactory;
+            } else {
+                fallbackGraphicsConfigurationFactory = GraphicsConfigurationFactory.getFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, CapabilitiesImmutable.class);
+            }
         } /* else if(NativeWindowFactory.TYPE_WINDOWS == NativeWindowFactory.getNativeWindowType(false)) {
             nativeGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(javax.media.nativewindow.windows.WindowsGraphicsDevice.class, eglFactory);
-        } else if(NativeWindowFactory.TYPE_MACOSX == NativeWindowFactory.getNativeWindowType(false)) {            
+        } else if(NativeWindowFactory.TYPE_MACOSX == NativeWindowFactory.getNativeWindowType(false)) {
         } */
-        
+
         // become the selector for KD/EGL ..
-        kdeglGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, eglFactory);
+        kdeglGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, GLCapabilitiesImmutable.class, eglFactory);
     }
-    
+
     static void unregisterFactory() {
         final String nwType = NativeWindowFactory.getNativeWindowType(false);
         if(NativeWindowFactory.TYPE_X11 == nwType) {
-            GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, nativeGraphicsConfigurationFactory);                    
+            GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, GLCapabilitiesImmutable.class, nativeGraphicsConfigurationFactory);
         } /* else if(NativeWindowFactory.TYPE_WINDOWS == NativeWindowFactory.getNativeWindowType(false)) {
             GraphicsConfigurationFactory.registerFactory(javax.media.nativewindow.windows.WindowsGraphicsDevice.class, nativeGraphicsConfigurationFactory);
-        } else if(NativeWindowFactory.TYPE_MACOSX == NativeWindowFactory.getNativeWindowType(false)) {            
+        } else if(NativeWindowFactory.TYPE_MACOSX == NativeWindowFactory.getNativeWindowType(false)) {
         } */
         nativeGraphicsConfigurationFactory = null;
-        
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, kdeglGraphicsConfigurationFactory);
+        fallbackGraphicsConfigurationFactory = null;
+
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, GLCapabilitiesImmutable.class, kdeglGraphicsConfigurationFactory);
         kdeglGraphicsConfigurationFactory = null;
     }
-    
+
     private EGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl (
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         if (absScreen == null) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only AbstractGraphicsDevice objects");
         }
@@ -132,21 +140,21 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
         AbstractGraphicsDevice absDevice = absScreen.getDevice();
         if(null==absDevice) {
             throw new GLException("Null AbstractGraphicsDevice");
-        }        
-        
+        }
+
         AbstractGraphicsConfiguration cfg = null;
-        
+
         if( absDevice instanceof EGLGraphicsDevice ) {
             cfg = chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable) capsChosen,
                                                     (GLCapabilitiesImmutable) capsRequested,
                                                     (GLCapabilitiesChooser) chooser,
-                                                    absScreen, VisualIDHolder.VID_UNDEFINED, false);            
+                                                    absScreen, nativeVisualID, false);
         } else {
-            // handle non native cases (X11, ..) 
-            if(null == nativeGraphicsConfigurationFactory) {
-                throw new InternalError("Native GraphicsConfigurationFactory is null, but call issued for device: "+absDevice+" of type "+absDevice.getClass().getSimpleName());
+            // handle non native cases (X11, ..)
+            if(null == fallbackGraphicsConfigurationFactory) {
+                throw new InternalError("Native fallback GraphicsConfigurationFactory is null, but call issued for device: "+absDevice+" of type "+absDevice.getClass().getSimpleName());
             }
-            
+
             if(glCapsChosen.getGLProfile().usesNativeGLES()) {
                 if(DEBUG) {
                     System.err.println("EGLGraphicsConfigurationFactory.choose..: Handle native device "+absDevice.getClass().getSimpleName());
@@ -154,7 +162,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
                 cfg = chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable) capsChosen,
                                                         (GLCapabilitiesImmutable) capsRequested,
                                                         (GLCapabilitiesChooser) chooser,
-                                                        absScreen, VisualIDHolder.VID_UNDEFINED, false);
+                                                        absScreen, nativeVisualID, false);
                 if(null == cfg || VisualIDHolder.VID_UNDEFINED == cfg.getVisualID(VIDType.NATIVE)) {
                     cfg = null;
                     if(DEBUG) {
@@ -165,23 +173,25 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             if(null == cfg) {
                 // fwd to native config factory (only X11 for now)
                 if(DEBUG) {
-                    System.err.println("EGLGraphicsConfigurationFactory.choose..: Delegate to "+nativeGraphicsConfigurationFactory.getClass().getSimpleName());
+                    System.err.println("EGLGraphicsConfigurationFactory.choose..: Delegate to "+fallbackGraphicsConfigurationFactory.getClass().getSimpleName());
                 }
-                cfg = nativeGraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen);
-            }            
+                cfg = fallbackGraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen, nativeVisualID);
+            }
         }
         return cfg;
     }
 
     protected static List<GLCapabilitiesImmutable> getAvailableCapabilities(EGLDrawableFactory factory, AbstractGraphicsDevice device) {
-        EGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateEGLSharedResource(device);
+        final EGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
         if(null == sharedResource) {
             throw new GLException("Shared resource for device n/a: "+device);
         }
-        EGLGraphicsDevice eglDevice = sharedResource.getDevice();
-        long eglDisplay = eglDevice.getHandle();
-
-        List/*<EGLGLCapabilities>*/ availableCaps = null;
+        final EGLGraphicsDevice eglDevice = sharedResource.getDevice();
+        final long eglDisplay = eglDevice.getHandle();
+        if(0 == eglDisplay) {
+            throw new GLException("null eglDisplay");
+        }
+        List<GLCapabilitiesImmutable> availableCaps = null;
         IntBuffer numConfigs = Buffers.newDirectIntBuffer(1);
 
         if(!EGL.eglGetConfigs(eglDisplay, null, 0, numConfigs)) {
@@ -197,19 +207,18 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             throw new GLException("Graphics configuration get all configs (eglGetConfigs) call failed, error "+toHexString(EGL.eglGetError()));
         }
         if (numConfigs.get(0) > 0) {
-            availableCaps = eglConfigs2GLCaps(null, eglDisplay, configs, numConfigs.get(0), GLGraphicsConfigurationUtil.ALL_BITS, false);
+            availableCaps = eglConfigs2GLCaps(eglDevice, null, configs, numConfigs.get(0), GLGraphicsConfigurationUtil.ALL_BITS, false /* forceTransparentFlag */, false /* onlyFirstValid */);
             if( null != availableCaps && availableCaps.size() > 1) {
                 Collections.sort(availableCaps, EglCfgIDComparator);
             }
         }
-
         return availableCaps;
     }
 
     public static EGLGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
                                                                              GLCapabilitiesImmutable capsReq,
                                                                              GLCapabilitiesChooser chooser,
-                                                                             AbstractGraphicsScreen absScreen, int nativeVisualID, 
+                                                                             AbstractGraphicsScreen absScreen, int nativeVisualID,
                                                                              boolean forceTransparentFlag) {
         if (capsChosen == null) {
             capsChosen = new GLCapabilities(null);
@@ -222,101 +231,107 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
         if(null==absDevice) {
             throw new GLException("Null AbstractGraphicsDevice");
         }
-        
-        final long eglDisplay;
+
+        final EGLGraphicsDevice eglDevice;
         final boolean ownEGLDisplay;
-        if( !(absDevice instanceof EGLGraphicsDevice) ) {
-            eglDisplay = EGLDisplayUtil.eglGetDisplay(absDevice.getHandle());
-            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                throw new GLException("Could not get EGL display from: "+absDevice);
-            }
-            if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
-                throw new GLException("eglInitialize failed eglDisplay 0x"+Long.toHexString(eglDisplay)+", "+absDevice+", error 0x"+Integer.toHexString(EGL.eglGetError()));
-            }
-            ownEGLDisplay = true;
-        } else {
-            eglDisplay = absDevice.getHandle();
-            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                throw new GLException("Invalid EGL display: "+absDevice);
+        if( absDevice instanceof EGLGraphicsDevice ) {
+            eglDevice = (EGLGraphicsDevice) absDevice;
+            if (eglDevice.getHandle() == EGL.EGL_NO_DISPLAY) {
+                throw new GLException("Invalid EGL display: "+eglDevice);
             }
             ownEGLDisplay = false;
+        } else {
+            eglDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(absDevice.getHandle(), absDevice.getConnection(), absDevice.getUnitID());
+            eglDevice.open();
+            ownEGLDisplay = true;
         }
 
-        EGLDrawableFactory factory = (EGLDrawableFactory) GLDrawableFactory.getEGLFactory();
-        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, factory.canCreateGLPbuffer(absDevice) );
-
-        GLProfile glp = capsChosen.getGLProfile();
-        GLCapabilities fixedCaps;
-
-        EGLGraphicsConfiguration res = eglChooseConfig(eglDisplay, capsChosen, capsReq, chooser, absScreen, nativeVisualID, forceTransparentFlag);
+        final GLProfile glp = capsChosen.getGLProfile();
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLDrawableFactory.getEGLFactory(), absDevice);
+        EGLGraphicsConfiguration res = eglChooseConfig(eglDevice, capsChosen, capsReq, chooser, absScreen, nativeVisualID, forceTransparentFlag);
         if(null==res) {
             if(DEBUG) {
                 System.err.println("eglChooseConfig failed with given capabilities "+capsChosen);
             }
-    
+
             // Last try .. add a fixed embedded profile [ATI, Nokia, Intel, ..]
             //
             // rgb888 - d16, s4
-            fixedCaps = new GLCapabilities(glp);
+            final GLCapabilities fixedCaps = new GLCapabilities(glp);
+            fixedCaps.setSampleBuffers(true);
+            fixedCaps.setNumSamples(4);
             fixedCaps.setRedBits(8);
             fixedCaps.setGreenBits(8);
             fixedCaps.setBlueBits(8);
             fixedCaps.setDepthBits(16);
-            fixedCaps.setSampleBuffers(true);
-            fixedCaps.setNumSamples(4);
+            if( !capsChosen.isOnscreen() ) {
+                fixedCaps.setOnscreen(false);
+                fixedCaps.setPBuffer(capsChosen.isPBuffer());
+                fixedCaps.setFBO(capsChosen.isFBO());
+            }
             if(DEBUG) {
                 System.err.println("trying fixed caps (1): "+fixedCaps);
             }
-            res = eglChooseConfig(eglDisplay, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
+            res = eglChooseConfig(eglDevice, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
         }
         if(null==res) {
             //
             // rgb565 - d16, s0
-            fixedCaps = new GLCapabilities(glp);
+            final GLCapabilities fixedCaps = new GLCapabilities(glp);
             fixedCaps.setRedBits(5);
             fixedCaps.setGreenBits(6);
             fixedCaps.setBlueBits(5);
             fixedCaps.setDepthBits(16);
+            if( !capsChosen.isOnscreen() ) {
+                fixedCaps.setOnscreen(false);
+                fixedCaps.setPBuffer(capsChosen.isPBuffer());
+                fixedCaps.setFBO(capsChosen.isFBO());
+            }
             if(DEBUG) {
                 System.err.println("trying fixed caps (2): "+fixedCaps);
             }
-            res = eglChooseConfig(eglDisplay, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
+            res = eglChooseConfig(eglDevice, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
         }
         if(null==res) {
             //
             // rgb565 - d16, s4
-            fixedCaps = new GLCapabilities(glp);
+            final GLCapabilities fixedCaps = new GLCapabilities(glp);
+            fixedCaps.setSampleBuffers(true);
+            fixedCaps.setNumSamples(4);
             fixedCaps.setRedBits(5);
             fixedCaps.setGreenBits(6);
             fixedCaps.setBlueBits(5);
             fixedCaps.setDepthBits(16);
-            fixedCaps.setSampleBuffers(true);
-            fixedCaps.setNumSamples(4);
+            if( !capsChosen.isOnscreen() ) {
+                fixedCaps.setOnscreen(false);
+                fixedCaps.setPBuffer(capsChosen.isPBuffer());
+                fixedCaps.setFBO(capsChosen.isFBO());
+            }
             if(DEBUG) {
                 System.err.println("trying fixed caps (3): "+fixedCaps);
             }
-            res = eglChooseConfig(eglDisplay, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
+            res = eglChooseConfig(eglDevice, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
         }
         if(null==res) {
             throw new GLException("Graphics configuration failed [direct caps, eglGetConfig/chooser and fixed-caps(1-3)]");
         }
         if(ownEGLDisplay) {
-            ((EGLGLCapabilities) res.getChosenCapabilities()).setEGLConfig(0); // eglDisplay: EOL 
-            EGLDisplayUtil.eglTerminate(eglDisplay);
+            ((EGLGLCapabilities) res.getChosenCapabilities()).setEGLConfig(0); // eglDisplay: EOL
+            eglDevice.close();
         }
         return res;
     }
 
-    static EGLGraphicsConfiguration eglChooseConfig(long eglDisplay, 
+
+    static EGLGraphicsConfiguration eglChooseConfig(EGLGraphicsDevice device,
                                                     GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
                                                     GLCapabilitiesChooser chooser,
                                                     AbstractGraphicsScreen absScreen,
                                                     int nativeVisualID, boolean forceTransparentFlag) {
+        final long eglDisplay = device.getHandle();
         final GLProfile glp = capsChosen.getGLProfile();
-        final boolean onscreen = capsChosen.isOnscreen();
-        final boolean usePBuffer = capsChosen.isPBuffer();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-        List/*<EGLGLCapabilities>*/ availableCaps = null;
+        final int winattrmask = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(capsChosen);
+        List<GLCapabilitiesImmutable> availableCaps = null;
         int recommendedIndex = -1;
         long recommendedEGLConfig = -1;
         IntBuffer numConfigs = Buffers.newDirectIntBuffer(1);
@@ -327,35 +342,58 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
         if(0 == numConfigs.get(0)) {
             throw new GLException("EGLGraphicsConfiguration.eglChooseConfig: Get maxConfigs (eglGetConfigs) no configs");
         }
+        final int numEGLConfigs = numConfigs.get(0);
         if (DEBUG) {
-            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: eglChooseConfig maxConfigs: "+numConfigs.get(0));
-            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: eglDisplay "+toHexString(eglDisplay)+", "+capsChosen+", nativeVisualID "+toHexString(nativeVisualID));
+            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: eglChooseConfig eglDisplay "+toHexString(eglDisplay)+
+                               ", nativeVisualID "+toHexString(nativeVisualID)+
+                               ", capsChosen "+capsChosen+", winbits "+GLGraphicsConfigurationUtil.winAttributeBits2String(null, winattrmask).toString()+
+                               ", fboAvail "+GLContext.isFBOAvailable(device, glp)+
+                               ", device "+device+", "+device.getUniqueID()+
+                               ", numEGLConfigs "+numEGLConfigs);
         }
 
-        final IntBuffer attrs = Buffers.newDirectIntBuffer(EGLGraphicsConfiguration.GLCapabilities2AttribList(capsChosen));
+        final IntBuffer attrs = EGLGraphicsConfiguration.GLCapabilities2AttribList(capsChosen);
         PointerBuffer configs = PointerBuffer.allocateDirect(numConfigs.get(0));
 
-        // 1st choice: get GLCapabilities based on users GLCapabilities 
+        // 1st choice: get GLCapabilities based on users GLCapabilities
         //             setting recommendedIndex as preferred choice
         // skipped if nativeVisualID is given
-        if( VisualIDHolder.VID_UNDEFINED != nativeVisualID || !EGL.eglChooseConfig(eglDisplay, attrs, configs, configs.capacity(), numConfigs) ) {
+        final boolean hasEGLChosenCaps;
+        if( VisualIDHolder.VID_UNDEFINED == nativeVisualID ) {
+            if( !EGL.eglChooseConfig(eglDisplay, attrs, configs, configs.capacity(), numConfigs) ) {
+                if(DEBUG) {
+                    System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 eglChooseConfig: false");
+                }
+                numConfigs.put(0, 0);
+                hasEGLChosenCaps = false;
+            } else {
+                hasEGLChosenCaps = numConfigs.get(0)>0;
+            }
+        } else {
             if(DEBUG) {
-                System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 eglChooseConfig: false");
+                System.err.println("EGLGraphicsConfiguration.eglChooseConfig: Skipped due to given visualID: "+toHexString(nativeVisualID));
             }
-        } else  if (numConfigs.get(0) > 0) {
-            availableCaps = eglConfigs2GLCaps(glp, eglDisplay, configs, numConfigs.get(0), winattrmask, forceTransparentFlag);
+            hasEGLChosenCaps = false;
+        }
+        final boolean useRecommendedIndex = hasEGLChosenCaps && !forceTransparentFlag && capsChosen.isBackgroundOpaque(); // only use recommended idx if not translucent
+        final boolean skipCapsChooser = null == chooser && useRecommendedIndex; // fast path: skip choosing if using recommended idx and null chooser is used
+        if( hasEGLChosenCaps ) {
+            availableCaps = eglConfigs2GLCaps(device, glp, configs, numConfigs.get(0), winattrmask, forceTransparentFlag, skipCapsChooser /* onlyFirsValid */);
             if(availableCaps.size() > 0) {
                 recommendedEGLConfig =  configs.get(0);
                 recommendedIndex = 0;
                 if (DEBUG) {
                     System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 eglChooseConfig: recommended fbcfg " + toHexString(recommendedEGLConfig) + ", idx " + recommendedIndex);
+                    System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 useRecommendedIndex "+useRecommendedIndex+", skipCapsChooser "+skipCapsChooser);
                     System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 fbcfg caps " + availableCaps.get(recommendedIndex));
                 }
             } else if (DEBUG) {
                 System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 eglChooseConfig: no caps for recommended fbcfg " + toHexString(configs.get(0)));
+                System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 useRecommendedIndex "+useRecommendedIndex+", skipCapsChooser "+skipCapsChooser);
             }
         } else if (DEBUG) {
             System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 eglChooseConfig: no configs");
+            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #1 useRecommendedIndex "+useRecommendedIndex+", skipCapsChooser "+skipCapsChooser);
         }
 
         // 2nd choice: get all GLCapabilities available, no preferred recommendedIndex available
@@ -368,7 +406,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
                 throw new GLException("EGLGraphicsConfiguration.eglChooseConfig: #2 Get all configs (eglGetConfigs) call failed, error "+toHexString(EGL.eglGetError()));
             }
             if (numConfigs.get(0) > 0) {
-                availableCaps = eglConfigs2GLCaps(glp, eglDisplay, configs, numConfigs.get(0), winattrmask, forceTransparentFlag);
+                availableCaps = eglConfigs2GLCaps(device, glp, configs, numConfigs.get(0), winattrmask, forceTransparentFlag, false /* onlyFirsValid */);
             }
         }
 
@@ -376,10 +414,12 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             if(DEBUG) {
                 // FIXME: this happens on a ATI PC Emulation ..
                 System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #2 Graphics configuration 1st choice and 2nd choice failed - no configs");
+                availableCaps = eglConfigs2GLCaps(device, glp, configs, numConfigs.get(0), GLGraphicsConfigurationUtil.ALL_BITS, forceTransparentFlag, false /* onlyFirsValid */);
+                printCaps("AllCaps", availableCaps, System.err);
             }
             return null;
         }
-        
+
         if(DEBUG) {
             System.err.println("EGLGraphicsConfiguration.eglChooseConfig: got configs: "+availableCaps.size());
             for(int i=0; i<availableCaps.size(); i++) {
@@ -387,11 +427,16 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             }
         }
 
-        if( VisualIDHolder.VID_UNDEFINED != nativeVisualID ) {
-            List/*<EGLGLCapabilities>*/ removedCaps = new ArrayList();
+        if( VisualIDHolder.VID_UNDEFINED != nativeVisualID ) { // implies !hasEGLChosenCaps
+            List<GLCapabilitiesImmutable> removedCaps = new ArrayList<GLCapabilitiesImmutable>();
             for(int i=0; i<availableCaps.size(); ) {
-                VisualIDHolder vidh = (VisualIDHolder) availableCaps.get(i);
-                if(vidh.getVisualID(VIDType.NATIVE) != nativeVisualID) {
+                final GLCapabilitiesImmutable aCap = availableCaps.get(i);
+                if(aCap.getVisualID(VIDType.NATIVE) != nativeVisualID) {
+                    if(DEBUG) { System.err.println("Remove["+i+"] (mismatch VisualID): "+aCap); }
+                    removedCaps.add(availableCaps.remove(i));
+                } else if( 0 == aCap.getDepthBits() && 0 < capsChosen.getDepthBits() ) {
+                    // Hack for HiSilicon/Vivante/Immersion.16 Renderer ..
+                    if(DEBUG) { System.err.println("Remove["+i+"] (mismatch depth-bits): "+aCap); }
                     removedCaps.add(availableCaps.remove(i));
                 } else {
                     i++;
@@ -404,10 +449,18 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
                 }
             } else if(DEBUG) {
                 System.err.println("EGLGraphicsConfiguration.eglChooseConfig: post filter nativeVisualID "+toHexString(nativeVisualID)+" got configs: "+availableCaps.size());
+                for(int i=0; i<availableCaps.size(); i++) {
+                    System.err.println(i+": "+availableCaps.get(i));
+                }
             }
         }
 
-        final int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
+        final int chosenIndex;
+        if( skipCapsChooser && 0 <= recommendedIndex ) {
+            chosenIndex = recommendedIndex;
+        } else {
+            chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
+        }
         if ( 0 > chosenIndex ) {
             if (DEBUG) {
                 System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #2 chooseCapabilities failed");
@@ -415,46 +468,32 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             return null;
         }
         final EGLGLCapabilities chosenCaps = (EGLGLCapabilities) availableCaps.get(chosenIndex);
+        final EGLGraphicsConfiguration res = new EGLGraphicsConfiguration(absScreen, chosenCaps, capsRequested, chooser);
         if (DEBUG) {
-            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: X chosen :"+chosenIndex+", eglConfig: "+toHexString(chosenCaps.getEGLConfig())+", "+chosenCaps);
+            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: X chosen :"+chosenIndex+", eglConfig: "+toHexString(chosenCaps.getEGLConfig())+": "+res);
         }
-        return new EGLGraphicsConfiguration(absScreen, chosenCaps, capsRequested, chooser);
+        return res;
     }
 
-    static List/*<GLCapabilitiesImmutable>*/ eglConfigs2GLCaps(GLProfile glp, long eglDisplay, PointerBuffer configs, int num, int winattrmask, boolean forceTransparentFlag) {
-        ArrayList caps = new ArrayList(num);
+    static List<GLCapabilitiesImmutable> eglConfigs2GLCaps(EGLGraphicsDevice device, GLProfile glp, PointerBuffer configs, int num, int winattrmask, boolean forceTransparentFlag, boolean onlyFirstValid) {
+        final GLRendererQuirks defaultQuirks = GLRendererQuirks.getStickyDeviceQuirks( GLDrawableFactory.getEGLFactory().getDefaultDevice() );
+        List<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>(num);
         for(int i=0; i<num; i++) {
-            EGLGraphicsConfiguration.EGLConfig2Capabilities(caps, glp, eglDisplay, configs.get(i), winattrmask, forceTransparentFlag);
+            final GLCapabilitiesImmutable caps = EGLGraphicsConfiguration.EGLConfig2Capabilities(defaultQuirks, device, glp, configs.get(i), winattrmask, forceTransparentFlag);
+            if(null != caps) {
+                bucket.add(caps);
+                if(onlyFirstValid) {
+                    break;
+                }
+            }
         }
-        return caps;
+        return bucket;
     }
 
-    static void printCaps(String prefix, List/*GLCapabilitiesImmutable*/ caps, PrintStream out) {
+    static void printCaps(String prefix, List<GLCapabilitiesImmutable> caps, PrintStream out) {
         for(int i=0; i<caps.size(); i++) {
             out.println(prefix+"["+i+"] "+caps.get(i));
         }
     }
-
-    static EGLGraphicsConfiguration createOffscreenGraphicsConfiguration(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsReq, GLCapabilitiesChooser chooser) {
-        if(capsChosen.isOnscreen()) {
-            throw new GLException("Error: Onscreen set: "+capsChosen);
-        }
-
-        if(capsChosen.getDoubleBuffered()) {
-            // OFFSCREEN !DOUBLE_BUFFER // FIXME DBLBUFOFFSCRN
-            GLCapabilities caps2 = (GLCapabilities) capsChosen.cloneMutable();
-            caps2.setDoubleBuffered(false);
-            capsChosen = caps2;
-        }
-
-        DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
-        EGLGraphicsConfiguration eglConfig = chooseGraphicsConfigurationStatic(capsChosen, capsReq, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
-        if (null == eglConfig) {
-            throw new GLException("Couldn't create EGLGraphicsConfiguration from "+screen);
-        } else if(DEBUG) {
-            System.err.println("Chosen eglConfig: "+eglConfig);
-        }
-        return eglConfig;
-    }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenContext.java
deleted file mode 100644
index dd0a3db3a..000000000
--- a/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenContext.java
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.egl;
-
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import jogamp.opengl.*;
-import com.jogamp.gluegen.runtime.ProcAddressTable;
-import java.nio.*;
-import java.util.*;
-
-public class EGLOnscreenContext extends EGLContext {
-    public EGLOnscreenContext(EGLOnscreenDrawable drawable, GLContext shareWith) {
-        super(drawable, shareWith);
-    }
-
-    public void bindPbufferToTexture() {
-        throw new GLException("Should not call this");
-    }
-
-    public void releasePbufferFromTexture() {
-        throw new GLException("Should not call this");
-    }
-
-}
-
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java b/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java
index 42f067b29..065f80dcb 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -48,12 +48,14 @@ public class EGLOnscreenDrawable extends EGLDrawable {
         super(factory, component);
     }
 
+    @Override
     public GLContext createContext(GLContext shareWith) {
-        return new EGLOnscreenContext(this, shareWith);
+        return new EGLContext(this, shareWith);
     }
 
-    protected long createSurface(long eglDpy, long eglNativeCfg, long surfaceHandle) {
-        return EGL.eglCreateWindowSurface(eglDpy, eglNativeCfg, surfaceHandle, null);
+    @Override
+    protected long createSurface(EGLGraphicsConfiguration config, int width, int height, long nativeSurfaceHandle) {
+        return EGL.eglCreateWindowSurface(config.getScreen().getDevice().getHandle(), config.getNativeConfig(), nativeSurfaceHandle, null);
     }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLPbufferContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLPbufferContext.java
deleted file mode 100644
index 2cad7daac..000000000
--- a/src/jogl/classes/jogamp/opengl/egl/EGLPbufferContext.java
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.egl;
-
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import jogamp.opengl.*;
-import com.jogamp.gluegen.runtime.ProcAddressTable;
-import java.nio.*;
-import java.util.*;
-
-public class EGLPbufferContext extends EGLContext {
-    public EGLPbufferContext(EGLPbufferDrawable drawable, GLContext shareWith) {
-        super(drawable, shareWith);
-    }
-
-    public int getFloatingPointMode() {
-        return 0; // FIXME ??
-    }
-
-    public void bindPbufferToTexture() {
-        throw new GLException("Not yet implemented");
-    }
-
-    public void releasePbufferFromTexture() {
-        throw new GLException("Not yet implemented");
-    }
-}
-
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java b/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java
index 28a23d294..45e39f5d1 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,64 +29,35 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.egl;
 
-import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
-import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
 
 public class EGLPbufferDrawable extends EGLDrawable {
-    private int texFormat;
     protected static final boolean useTexture = false; // No yet ..
 
     protected EGLPbufferDrawable(EGLDrawableFactory factory, NativeSurface target) {
         super(factory, target);
     }
 
-    protected void destroyImpl() {
-        setRealized(false);
-    }
-    
-    protected long createSurface(long eglDpy, long eglNativeCfg, long surfaceHandle) {
-        final AbstractGraphicsConfiguration config = getNativeSurface().getGraphicsConfiguration();
-        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-
-        if(useTexture) {
-            texFormat = caps.getAlphaBits() > 0 ? EGL.EGL_TEXTURE_RGBA : EGL.EGL_TEXTURE_RGB ;
-        } else {
-            texFormat = EGL.EGL_NO_TEXTURE;
-        }
-
-        if (DEBUG) {
-          System.out.println("Pbuffer config: " + config);
-        }
-
-        NativeSurface nw = getNativeSurface();
-        int[] attrs = EGLGraphicsConfiguration.CreatePBufferSurfaceAttribList(nw.getWidth(), nw.getHeight(), texFormat);
-        long surf = EGL.eglCreatePbufferSurface(eglDpy, eglNativeCfg, attrs, 0);
-        if (EGL.EGL_NO_SURFACE==surf) {
-            throw new GLException("Creation of window surface (eglCreatePbufferSurface) failed, dim "+nw.getWidth()+"x"+nw.getHeight()+", error 0x"+Integer.toHexString(EGL.eglGetError()));
-        } else if(DEBUG) {
-            System.err.println("PBuffer setSurface result: eglSurface 0x"+Long.toHexString(surf));
-        }
-        ((SurfaceChangeable)nw).setSurfaceHandle(surf);
-        return surf;
+    @Override
+    protected long createSurface(EGLGraphicsConfiguration config, int width, int height, long nativeSurfaceHandle) {
+        return EGLDrawableFactory.createPBufferSurfaceImpl(config, width, height, false);
     }
 
+    @Override
     public GLContext createContext(GLContext shareWith) {
-        return new EGLPbufferContext(this, shareWith);
+        return new EGLContext(this, shareWith);
     }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLUpstreamSurfaceHook.java b/src/jogl/classes/jogamp/opengl/egl/EGLUpstreamSurfaceHook.java
new file mode 100644
index 000000000..5b911576e
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLUpstreamSurfaceHook.java
@@ -0,0 +1,217 @@
+package jogamp.opengl.egl;
+
+import javax.media.nativewindow.AbstractGraphicsConfiguration;
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.AbstractGraphicsScreen;
+import javax.media.nativewindow.DefaultGraphicsScreen;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.nativewindow.VisualIDHolder.VIDType;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLException;
+
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+
+/**
+ * <pre>
+ * EGLWrappedSurface [ is_a -> WrappedSurface -> ProxySurfaceImpl -> ProxySurface -> MutableSurface -> NativeSurface] has_a
+ *     EGLUpstreamSurfaceHook [ is_a -> UpstreamSurfaceHook.MutableSize -> UpstreamSurfaceHook ] has_a
+ *        NativeSurface (i.e. native X11 surface)
+ * </pre>
+ */
+public class EGLUpstreamSurfaceHook implements UpstreamSurfaceHook.MutableSize {
+    protected static final boolean DEBUG = EGLDrawableFactory.DEBUG;
+    private final NativeSurface upstreamSurface;
+    private final UpstreamSurfaceHook.MutableSize upstreamSurfaceHookMutableSize;
+
+    public EGLUpstreamSurfaceHook(NativeSurface upstream) {
+        upstreamSurface = upstream;
+        if(upstreamSurface instanceof ProxySurface) {
+            final UpstreamSurfaceHook ush = ((ProxySurface)upstreamSurface).getUpstreamSurfaceHook();
+            if(ush instanceof UpstreamSurfaceHook.MutableSize) {
+                // offscreen NativeSurface w/ MutableSize (default)
+                upstreamSurfaceHookMutableSize = (UpstreamSurfaceHook.MutableSize) ush;
+            } else {
+                upstreamSurfaceHookMutableSize = null;
+            }
+        } else {
+            upstreamSurfaceHookMutableSize = null;
+        }
+    }
+
+    public final NativeSurface getUpstreamSurface() { return upstreamSurface; }
+
+    static String getThreadName() { return Thread.currentThread().getName(); }
+
+    @Override
+    public final void setSize(int width, int height) {
+        if(null != upstreamSurfaceHookMutableSize) {
+            upstreamSurfaceHookMutableSize.setSize(width, height);
+        }
+    }
+
+    @Override
+    public final void create(ProxySurface surface) {
+        final String dbgPrefix;
+        if(DEBUG) {
+            dbgPrefix = getThreadName() + ": EGLUpstreamSurfaceHook.create( up "+upstreamSurface.getClass().getSimpleName()+" -> this "+surface.getClass().getSimpleName()+" ): ";
+            System.err.println(dbgPrefix+this);
+        } else {
+            dbgPrefix = null;
+        }
+
+        if(upstreamSurface instanceof ProxySurface) {
+            // propagate createNotify(..) so upstreamSurface will be created
+            ((ProxySurface)upstreamSurface).createNotify();
+        }
+
+        // lock upstreamSurface, so it can be used in case EGLDisplay is derived from it!
+        if(NativeSurface.LOCK_SURFACE_NOT_READY >= upstreamSurface.lockSurface()) {
+            throw new GLException("Could not lock: "+upstreamSurface);
+        }
+        try {
+            evalUpstreamSurface(dbgPrefix, surface);
+        } finally {
+            upstreamSurface.unlockSurface();
+        }
+    }
+
+    private final void evalUpstreamSurface(String dbgPrefix, ProxySurface surface) {
+        //
+        // evaluate nature of upstreamSurface, may create EGL instances if required
+        //
+
+        boolean isEGLSurfaceValid = true; // assume yes
+
+        final EGLGraphicsDevice eglDevice;
+        final AbstractGraphicsConfiguration aConfig;
+        {
+            final AbstractGraphicsConfiguration surfaceConfig = surface.getGraphicsConfiguration();
+            final AbstractGraphicsDevice surfaceDevice = null != surfaceConfig ? surfaceConfig.getScreen().getDevice() : null;
+            if(DEBUG) {
+                System.err.println(dbgPrefix+"SurfaceDevice: "+surfaceDevice.getClass().getSimpleName()+", hash 0x"+Integer.toHexString(surfaceDevice.hashCode())+", "+surfaceDevice);
+                System.err.println(dbgPrefix+"SurfaceConfig: "+surfaceConfig.getClass().getSimpleName()+", hash 0x"+Integer.toHexString(surfaceConfig.hashCode())+", "+surfaceConfig);
+            }
+
+            final AbstractGraphicsConfiguration upstreamConfig = upstreamSurface.getGraphicsConfiguration();
+            final AbstractGraphicsDevice upstreamDevice = upstreamConfig.getScreen().getDevice();
+            if(DEBUG) {
+                System.err.println(dbgPrefix+"UpstreamDevice: "+upstreamDevice.getClass().getSimpleName()+", hash 0x"+Integer.toHexString(upstreamDevice.hashCode())+", "+upstreamDevice);
+                System.err.println(dbgPrefix+"UpstreamConfig: "+upstreamConfig.getClass().getSimpleName()+", hash 0x"+Integer.toHexString(upstreamConfig.hashCode())+", "+upstreamConfig);
+            }
+
+            if( surfaceDevice instanceof EGLGraphicsDevice ) {
+                eglDevice = (EGLGraphicsDevice) surfaceDevice;
+                aConfig = surfaceConfig;
+                if(DEBUG) {
+                    System.err.println(dbgPrefix+"Reusing this eglDevice: "+eglDevice+", using this config "+aConfig.getClass().getSimpleName()+" "+aConfig);
+                }
+                if(EGL.EGL_NO_DISPLAY == eglDevice.getHandle()) {
+                    eglDevice.open();
+                    isEGLSurfaceValid = false;
+                    surface.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_DEVICE );
+                }
+            } else if( upstreamDevice instanceof EGLGraphicsDevice ) {
+                eglDevice = (EGLGraphicsDevice) upstreamDevice;
+                aConfig = upstreamConfig;
+                if(DEBUG) {
+                    System.err.println(dbgPrefix+"Reusing upstream eglDevice: "+eglDevice+", using upstream config "+aConfig.getClass().getSimpleName()+" "+aConfig);
+                }
+                if(EGL.EGL_NO_DISPLAY == eglDevice.getHandle()) {
+                    eglDevice.open();
+                    isEGLSurfaceValid = false;
+                    surface.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_DEVICE );
+                }
+            } else {
+                eglDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(upstreamSurface);
+                eglDevice.open();
+                aConfig = upstreamConfig;
+                isEGLSurfaceValid = false;
+                surface.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_DEVICE );
+            }
+        }
+
+        final GLCapabilitiesImmutable capsRequested = (GLCapabilitiesImmutable) aConfig.getRequestedCapabilities();
+        final EGLGraphicsConfiguration eglConfig;
+        if( aConfig instanceof EGLGraphicsConfiguration ) {
+            // Config is already in EGL type - reuse ..
+            final EGLGLCapabilities capsChosen = (EGLGLCapabilities) aConfig.getChosenCapabilities();
+            if( !isEGLSurfaceValid || !EGLGraphicsConfiguration.isEGLConfigValid(eglDevice.getHandle(), capsChosen.getEGLConfig()) ) {
+                // 'refresh' the native EGLConfig handle
+                capsChosen.setEGLConfig(EGLGraphicsConfiguration.EGLConfigId2EGLConfig(eglDevice.getHandle(), capsChosen.getEGLConfigID()));
+                if( 0 == capsChosen.getEGLConfig() ) {
+                    throw new GLException("Refreshing native EGLConfig handle failed with error "+EGLContext.toHexString(EGL.eglGetError())+": "+eglDevice+", "+capsChosen+" of "+aConfig);
+                }
+                final AbstractGraphicsScreen eglScreen = new DefaultGraphicsScreen(eglDevice, aConfig.getScreen().getIndex());
+                eglConfig  = new EGLGraphicsConfiguration(eglScreen, capsChosen, capsRequested, null);
+                if(DEBUG) {
+                    System.err.println(dbgPrefix+"Refreshing eglConfig: "+eglConfig);
+                }
+                isEGLSurfaceValid = false;
+            } else {
+                eglConfig = (EGLGraphicsConfiguration) aConfig;
+                if(DEBUG) {
+                    System.err.println(dbgPrefix+"Reusing eglConfig: "+eglConfig);
+                }
+            }
+        } else {
+            final AbstractGraphicsScreen eglScreen = new DefaultGraphicsScreen(eglDevice, aConfig.getScreen().getIndex());
+            eglConfig = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
+                    capsRequested, capsRequested, null, eglScreen, aConfig.getVisualID(VIDType.NATIVE), false /* forceTransparencyFlag */);
+
+            if (null == eglConfig) {
+                throw new GLException("Couldn't create EGLGraphicsConfiguration from "+eglScreen);
+            } else if(DEBUG) {
+                System.err.println(dbgPrefix+"Chosen eglConfig: "+eglConfig);
+            }
+            isEGLSurfaceValid = false;
+        }
+        surface.setGraphicsConfiguration(eglConfig);
+
+        if(isEGLSurfaceValid) {
+            isEGLSurfaceValid = EGLDrawable.isValidEGLSurface(eglDevice.getHandle(), upstreamSurface.getSurfaceHandle());
+        }
+        if(isEGLSurfaceValid) {
+            surface.setSurfaceHandle(upstreamSurface.getSurfaceHandle());
+            surface.clearUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );
+            if(DEBUG) {
+                System.err.println(dbgPrefix+"Fin: Already valid EGL surface - use as-is: "+upstreamSurface);
+            }
+        } else {
+            surface.setSurfaceHandle(EGL.EGL_NO_SURFACE);
+            surface.addUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE ); // create/destroy in EGLDrawable
+            if(DEBUG) {
+                System.err.println(dbgPrefix+"Fin: EGL surface n/a - TBD: "+upstreamSurface);
+            }
+        }
+    }
+
+    @Override
+    public final void destroy(ProxySurface surface) {
+        if(EGLDrawableFactory.DEBUG) {
+            System.err.println("EGLUpstreamSurfaceHook.destroy("+surface.getClass().getSimpleName()+"): "+this);
+        }
+        surface.clearUpstreamOptionBits( ProxySurface.OPT_PROXY_OWNS_UPSTREAM_SURFACE );
+        if(upstreamSurface instanceof ProxySurface) {
+            ((ProxySurface)upstreamSurface).destroyNotify();
+        }
+    }
+
+    @Override
+    public final int getWidth(ProxySurface s) {
+        return upstreamSurface.getWidth();
+    }
+
+    @Override
+    public final int getHeight(ProxySurface s) {
+        return upstreamSurface.getHeight();
+    }
+
+    @Override
+    public String toString() {
+        final String us_s = null != upstreamSurface ? ( upstreamSurface.getClass().getName() + ": 0x" + Long.toHexString(upstreamSurface.getSurfaceHandle()) ) : "nil";
+        return "EGLUpstreamSurfaceHook[ "+ upstreamSurface.getWidth() + "x" + upstreamSurface.getHeight() + ", " + us_s+ "]";
+    }
+
+}
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLWrappedSurface.java b/src/jogl/classes/jogamp/opengl/egl/EGLWrappedSurface.java
new file mode 100644
index 000000000..e6d43d957
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLWrappedSurface.java
@@ -0,0 +1,34 @@
+package jogamp.opengl.egl;
+
+import javax.media.nativewindow.NativeSurface;
+
+import jogamp.nativewindow.WrappedSurface;
+
+/**
+ * <pre>
+ * EGLWrappedSurface [ is_a -> WrappedSurface -> ProxySurfaceImpl -> ProxySurface -> MutableSurface -> NativeSurface] has_a
+ *     EGLUpstreamSurfaceHook [ is_a -> UpstreamSurfaceHook.MutableSize -> UpstreamSurfaceHook ] has_a
+ *        NativeSurface (i.e. native X11 surface)
+ * </pre>
+ */
+public class EGLWrappedSurface extends WrappedSurface {
+
+    public static EGLWrappedSurface get(NativeSurface surface) {
+        if(surface instanceof EGLWrappedSurface) {
+            return (EGLWrappedSurface)surface;
+        }
+        return new EGLWrappedSurface(surface);
+    }
+
+    public EGLWrappedSurface(NativeSurface surface) {
+        super(surface.getGraphicsConfiguration(), EGL.EGL_NO_SURFACE, new EGLUpstreamSurfaceHook(surface), false /* tbd in UpstreamSurfaceHook */);
+        if(EGLDrawableFactory.DEBUG) {
+            System.err.println("EGLWrappedSurface.ctor(): "+this);
+        }
+    }
+
+    @Override
+    public final NativeSurface getUpstreamSurface() {
+        return ((EGLUpstreamSurfaceHook)super.getUpstreamSurfaceHook()).getUpstreamSurface();
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/gl2/ProjectDouble.java b/src/jogl/classes/jogamp/opengl/gl2/ProjectDouble.java
index 9165dbc4b..a4aa1c7c5 100644
--- a/src/jogl/classes/jogamp/opengl/gl2/ProjectDouble.java
+++ b/src/jogl/classes/jogamp/opengl/gl2/ProjectDouble.java
@@ -6,9 +6,9 @@
 ** this file except in compliance with the License. You may obtain a copy
 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
+**
 ** http://oss.sgi.com/projects/FreeB
-** 
+**
 ** Note that, as provided in the License, the Software is distributed on an
 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
@@ -24,13 +24,13 @@
 ** except that Section 2.2 and 11 are omitted.  Any differences between
 ** the Alternative License and the SGI License are offered solely by Sun
 ** and not by SGI.
-** 
+**
 ** Original Code. The Original Code is: OpenGL Sample Implementation,
 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 ** Copyright in any portions created by third parties is as indicated
 ** elsewhere herein. All Rights Reserved.
-** 
+**
 ** Additional Notice Provisions: The application programming interfaces
 ** established by SGI in conjunction with the Original Code are The
 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -45,56 +45,56 @@
 ** $Header$
 */
 
-/* 
+/*
  * Copyright (c) 2002-2004 LWJGL Project
  * All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are 
+ * modification, are permitted provided that the following conditions are
  * met:
- * 
- * * Redistributions of source code must retain the above copyright 
+ *
+ * * Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  *
  * * Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  *
- * * Neither the name of 'LWJGL' nor the names of 
- *   its contributors may be used to endorse or promote products derived 
+ * * Neither the name of 'LWJGL' nor the names of
+ *   its contributors may be used to endorse or promote products derived
  *   from this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -107,7 +107,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
@@ -125,7 +125,7 @@ import com.jogamp.common.nio.Buffers;
  * <p/>
  * <p/>
  * Created 11-jan-2004
- * 
+ *
  * @author Erik Duijs
  * @author Kenneth Russell
  */
@@ -155,7 +155,7 @@ public class ProjectDouble {
   private final double[] forward = new double[3];
   private final double[] side = new double[3];
   private final double[] up = new double[3];
-  
+
   // Buffer-based implementation
   private DoubleBuffer locbuf;
   private final DoubleBuffer matrixBuf;
@@ -227,7 +227,7 @@ public class ProjectDouble {
 
   /**
    * Method __gluMultMatrixVecd
-   * 
+   *
    * @param matrix
    * @param in
    * @param out
@@ -244,7 +244,7 @@ public class ProjectDouble {
 
   /**
    * Method __gluMultMatrixVecd
-   * 
+   *
    * @param matrix
    * @param in
    * @param out
@@ -265,7 +265,7 @@ public class ProjectDouble {
   /**
    * @param src
    * @param inverse
-   * 
+   *
    * @return
    */
   private boolean __gluInvertMatrixd(double[] src, double[] inverse) {
@@ -335,7 +335,7 @@ public class ProjectDouble {
   /**
    * @param src
    * @param inverse
-   * 
+   *
    * @return
    */
   private boolean __gluInvertMatrixd(DoubleBuffer src, DoubleBuffer inverse) {
@@ -525,7 +525,7 @@ public class ProjectDouble {
 
   /**
    * Method gluOrtho2D.
-   * 
+   *
    * @param left
    * @param right
    * @param bottom
@@ -537,7 +537,7 @@ public class ProjectDouble {
 
   /**
    * Method gluPerspective.
-   * 
+   *
    * @param fovy
    * @param aspect
    * @param zNear
@@ -570,7 +570,7 @@ public class ProjectDouble {
 
   /**
    * Method gluLookAt
-   * 
+   *
    * @param eyex
    * @param eyey
    * @param eyez
@@ -631,7 +631,7 @@ public class ProjectDouble {
 
   /**
    * Method gluProject
-   * 
+   *
    * @param objx
    * @param objy
    * @param objz
@@ -639,7 +639,7 @@ public class ProjectDouble {
    * @param projMatrix
    * @param viewport
    * @param win_pos
-   * 
+   *
    * @return
    */
   public boolean gluProject(double objx,
@@ -685,7 +685,7 @@ public class ProjectDouble {
 
   /**
    * Method gluProject
-   * 
+   *
    * @param objx
    * @param objy
    * @param objz
@@ -693,7 +693,7 @@ public class ProjectDouble {
    * @param projMatrix
    * @param viewport
    * @param win_pos
-   * 
+   *
    * @return
    */
   public boolean gluProject(double objx,
@@ -738,7 +738,7 @@ public class ProjectDouble {
 
   /**
    * Method gluUnproject
-   * 
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -746,7 +746,7 @@ public class ProjectDouble {
    * @param projMatrix
    * @param viewport
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject(double winx,
@@ -799,7 +799,7 @@ public class ProjectDouble {
 
   /**
    * Method gluUnproject
-   * 
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -807,7 +807,7 @@ public class ProjectDouble {
    * @param projMatrix
    * @param viewport
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject(double winx,
@@ -858,7 +858,7 @@ public class ProjectDouble {
 
   /**
    * Method gluUnproject4
-   * 
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -869,7 +869,7 @@ public class ProjectDouble {
    * @param near
    * @param far
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject4(double winx,
@@ -923,7 +923,7 @@ public class ProjectDouble {
 
   /**
    * Method gluUnproject4
-   * 
+   *
    * @param winx
    * @param winy
    * @param winz
@@ -934,7 +934,7 @@ public class ProjectDouble {
    * @param near
    * @param far
    * @param obj_pos
-   * 
+   *
    * @return
    */
   public boolean gluUnProject4(double winx,
@@ -987,7 +987,7 @@ public class ProjectDouble {
 
   /**
    * Method gluPickMatrix
-   * 
+   *
    * @param x
    * @param y
    * @param deltaX
@@ -1014,7 +1014,7 @@ public class ProjectDouble {
 
   /**
    * Method gluPickMatrix
-   * 
+   *
    * @param x
    * @param y
    * @param deltaX
diff --git a/src/jogl/classes/jogamp/opengl/glu/GLUquadricImpl.java b/src/jogl/classes/jogamp/opengl/glu/GLUquadricImpl.java
index 3f8a76535..717b1255c 100644
--- a/src/jogl/classes/jogamp/opengl/glu/GLUquadricImpl.java
+++ b/src/jogl/classes/jogamp/opengl/glu/GLUquadricImpl.java
@@ -6,15 +6,15 @@
 ** this file except in compliance with the License. You may obtain a copy
 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
-** 
+**
 ** http://oss.sgi.com/projects/FreeB
-** 
+**
 ** Note that, as provided in the License, the Software is distributed on an
 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
-** 
+**
 ** NOTE:  The Original Code (as defined below) has been licensed to Sun
 ** Microsystems, Inc. ("Sun") under the SGI Free Software License B
 ** (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
 ** Copyright in any portions created by third parties is as indicated
 ** elsewhere herein. All Rights Reserved.
-** 
+**
 ** Additional Notice Provisions: The application programming interfaces
 ** established by SGI in conjunction with the Original Code are The
 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -45,56 +45,56 @@
 ** $Header$
 */
 
-/* 
+/*
  * Copyright (c) 2002-2004 LWJGL Project
  * All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are 
+ * modification, are permitted provided that the following conditions are
  * met:
- * 
- * * Redistributions of source code must retain the above copyright 
+ *
+ * * Redistributions of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
  *
  * * Redistributions in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
  *
- * * Neither the name of 'LWJGL' nor the names of 
- *   its contributors may be used to endorse or promote products derived 
+ * * Neither the name of 'LWJGL' nor the names of
+ *   its contributors may be used to endorse or promote products derived
  *   from this software without specific prior written permission.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -107,7 +107,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
@@ -115,15 +115,17 @@
 
 package jogamp.opengl.glu;
 
-import javax.media.opengl.*;
-import javax.media.opengl.glu.*;
+import javax.media.opengl.GL;
+import javax.media.opengl.glu.GLU;
+import javax.media.opengl.glu.GLUquadric;
+
 import com.jogamp.opengl.util.ImmModeSink;
-import java.nio.*;
+import com.jogamp.opengl.util.glsl.ShaderState;
 
 /**
  * GLUquadricImpl.java
- * 
- * 
+ *
+ *
  * Created 22-dec-2003 (originally Quadric.java)
  * @author Erik Duijs
  * @author Kenneth Russell, Sven Gothel
@@ -139,25 +141,30 @@ public class GLUquadricImpl implements GLUquadric {
   private boolean immModeSinkImmediate;
   public int normalType;
   public GL gl;
+  public ShaderState shaderState;
+  public int shaderProgram;
 
   public static final boolean USE_NORM = true;
   public static final boolean USE_TEXT = false;
 
   private ImmModeSink immModeSink=null;
 
-  public GLUquadricImpl(GL gl, boolean useGLSL) {
+  public GLUquadricImpl(GL gl, boolean useGLSL, ShaderState st, int shaderProgram) {
     this.gl=gl;
     this.useGLSL = useGLSL;
-    drawStyle = GLU.GLU_FILL;
-    orientation = GLU.GLU_OUTSIDE;
-    textureFlag = false;
-    normals = GLU.GLU_SMOOTH;
-    normalType = gl.isGLES1()?GL.GL_BYTE:GL.GL_FLOAT;
-    immModeSinkImmediate=true;
-    immModeSinkEnabled=!gl.isGL2();
+    this.drawStyle = GLU.GLU_FILL;
+    this.orientation = GLU.GLU_OUTSIDE;
+    this.textureFlag = false;
+    this.normals = GLU.GLU_SMOOTH;
+    this.normalType = gl.isGLES1()?GL.GL_BYTE:GL.GL_FLOAT;
+    this.immModeSinkImmediate=true;
+    this.immModeSinkEnabled=!gl.isGL2();
+    this.shaderState = st;
+    this.shaderProgram = shaderProgram;
     replaceImmModeSink();
   }
 
+  @Override
   public void enableImmModeSink(boolean val) {
     if(gl.isGL2()) {
         immModeSinkEnabled=val;
@@ -169,10 +176,12 @@ public class GLUquadricImpl implements GLUquadric {
     }
   }
 
+  @Override
   public boolean isImmModeSinkEnabled() {
     return immModeSinkEnabled;
   }
 
+  @Override
   public void setImmMode(boolean val) {
     if(immModeSinkEnabled) {
         immModeSinkImmediate=val;
@@ -181,30 +190,44 @@ public class GLUquadricImpl implements GLUquadric {
     }
   }
 
+  @Override
   public boolean getImmMode() {
     return immModeSinkImmediate;
   }
 
+  @Override
   public ImmModeSink replaceImmModeSink() {
     if(!immModeSinkEnabled) return null;
 
     ImmModeSink res = immModeSink;
     if(useGLSL) {
-        immModeSink = ImmModeSink.createGLSL (gl, GL.GL_STATIC_DRAW, 32, 
-                                              3, GL.GL_FLOAT,  // vertex
-                                              0, GL.GL_FLOAT,  // color
-                                              USE_NORM?3:0, normalType,// normal
-                                              USE_TEXT?2:0, GL.GL_FLOAT); // texture
+        if(null != shaderState) {
+            immModeSink = ImmModeSink.createGLSL (32,
+                                                  3, GL.GL_FLOAT,             // vertex
+                                                  0, GL.GL_FLOAT,             // color
+                                                  USE_NORM?3:0, normalType,   // normal
+                                                  USE_TEXT?2:0, GL.GL_FLOAT,  // texCoords
+                                                  GL.GL_STATIC_DRAW, shaderState);
+        } else {
+            immModeSink = ImmModeSink.createGLSL (32,
+                                                  3, GL.GL_FLOAT,             // vertex
+                                                  0, GL.GL_FLOAT,             // color
+                                                  USE_NORM?3:0, normalType,   // normal
+                                                  USE_TEXT?2:0, GL.GL_FLOAT,  // texCoords
+                                                  GL.GL_STATIC_DRAW, shaderProgram);
+        }
     } else {
-        immModeSink = ImmModeSink.createFixed(gl, GL.GL_STATIC_DRAW, 32, 
-                                              3, GL.GL_FLOAT,  // vertex
-                                              0, GL.GL_FLOAT,  // color
-                                              USE_NORM?3:0, normalType,// normal
-                                              USE_TEXT?2:0, GL.GL_FLOAT); // texture
+        immModeSink = ImmModeSink.createFixed(32,
+                                              3, GL.GL_FLOAT,             // vertex
+                                              0, GL.GL_FLOAT,             // color
+                                              USE_NORM?3:0, normalType,   // normal
+                                              USE_TEXT?2:0, GL.GL_FLOAT,  // texCoords
+                                              GL.GL_STATIC_DRAW);
     }
     return res;
   }
 
+  @Override
   public void resetImmModeSink(GL gl) {
     if(immModeSinkEnabled) {
         immModeSink.reset(gl);
@@ -212,7 +235,7 @@ public class GLUquadricImpl implements GLUquadric {
   }
 
   /**
-   * specifies the draw style for quadrics.  
+   * specifies the draw style for quadrics.
    *
    * The legal values are as follows:
    *
@@ -226,7 +249,7 @@ public class GLUquadricImpl implements GLUquadric {
    *            separating coplanar faces will not be drawn.
    *
    * GLU.POINT:       Quadrics are rendered as a set of points.
-   * 
+   *
    * @param drawStyle The drawStyle to set
    */
   public void setDrawStyle(int drawStyle) {
@@ -243,7 +266,7 @@ public class GLUquadricImpl implements GLUquadric {
    *
    * GLU.SMOOTH:   One normal is generated for every vertex of a quadric.  This
    *               is the default.
-   * 
+   *
    * @param normals The normals to set
    */
   public void setNormals(int normals) {
@@ -260,7 +283,7 @@ public class GLUquadricImpl implements GLUquadric {
    *
    * Note that the interpretation of outward and inward depends on the quadric
    * being drawn.
-   * 
+   *
    * @param orientation The orientation to set
    */
   public void setOrientation(int orientation) {
@@ -275,7 +298,7 @@ public class GLUquadricImpl implements GLUquadric {
    *
    * The manner in which texture coordinates are generated depends upon the
    * specific quadric rendered.
-   * 
+   *
    * @param textureFlag The textureFlag to set
    */
   public void setTextureFlag(boolean textureFlag) {
@@ -430,7 +453,7 @@ public class GLUquadricImpl implements GLUquadric {
       r = baseRadius;
       for (j = 0; j < stacks; j++) {
         float s = 0.0f;
-        glBegin(gl, immModeSink.GL_QUAD_STRIP);
+        glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
         for (i = 0; i <= slices; i++) {
           if (i == slices) {
             x = sin(0.0f);
@@ -495,10 +518,10 @@ public class GLUquadricImpl implements GLUquadric {
         glNormal3f(gl, 0.0f, 0.0f, -1.0f);
       }
     }
-    
+
     da = 2.0f * PI / slices;
     dr = (outerRadius - innerRadius) /  loops;
-    
+
     switch (drawStyle) {
     case GLU.GLU_FILL:
       {
@@ -514,7 +537,7 @@ public class GLUquadricImpl implements GLUquadric {
           float r2 = r1 + dr;
           if (orientation == GLU.GLU_OUTSIDE) {
             int s;
-            glBegin(gl, immModeSink.GL_QUAD_STRIP);
+            glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
             for (s = 0; s <= slices; s++) {
               float a;
               if (s == slices)
@@ -532,7 +555,7 @@ public class GLUquadricImpl implements GLUquadric {
           }
           else {
             int s;
-            glBegin(gl, immModeSink.GL_QUAD_STRIP);
+            glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
             for (s = slices; s >= 0; s--) {
               float a;
               if (s == slices)
@@ -631,18 +654,18 @@ public class GLUquadricImpl implements GLUquadric {
    * through startAngle + sweepAngle is included (where 0 degrees is along
    * the +y axis, 90 degrees along the +x axis, 180 along the -y axis, and
    * 270 along the -x axis).
-   * 
+   *
    * The partial disk has a radius of outerRadius, and contains a concentric
    * circular hole with a radius of innerRadius. If innerRadius is zero, then
    * no hole is generated. The partial disk is subdivided around the z axis
    * into slices (like pizza slices), and also about the z axis into rings
    * (as specified by slices and loops, respectively).
-   * 
+   *
    * With respect to orientation, the +z side of the partial disk is
    * considered to be outside (see gluQuadricOrientation). This means that if
    * the orientation is set to GLU.GLU_OUTSIDE, then any normals generated point
    * along the +z axis. Otherwise, they point along the -z axis.
-   * 
+   *
    * If texturing is turned on (with gluQuadricTexture), texture coordinates
    * are generated linearly such that where r=outerRadius, the value at (r, 0, 0)
    * is (1, 0.5), at (0, r, 0) it is (0.5, 1), at (-r, 0, 0) it is (0, 0.5),
@@ -655,11 +678,10 @@ public class GLUquadricImpl implements GLUquadric {
                               int loops,
                               float startAngle,
                               float sweepAngle) {
-    int i, j, max;
+    int i, j;
     float[] sinCache = new float[CACHE_SIZE];
     float[] cosCache = new float[CACHE_SIZE];
     float angle;
-    float x, y;
     float sintemp, costemp;
     float deltaRadius;
     float radiusLow, radiusHigh;
@@ -770,7 +792,7 @@ public class GLUquadricImpl implements GLUquadric {
           texHigh = radiusHigh / outerRadius / 2;
         }
 
-        glBegin(gl, immModeSink.GL_QUAD_STRIP);
+        glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
         for (i = 0; i <= slices; i++) {
           if (orientation == GLU.GLU_OUTSIDE) {
             if (textureFlag) {
@@ -984,7 +1006,7 @@ public class GLUquadricImpl implements GLUquadric {
       // draw intermediate stacks as quad strips
       for (i = imin; i < imax; i++) {
         rho = i * drho;
-        glBegin(gl, immModeSink.GL_QUAD_STRIP);
+        glBegin(gl, ImmModeSink.GL_QUAD_STRIP);
         s = 0.0f;
         for (j = 0; j <= slices; j++) {
           theta = (j == slices) ? 0.0f : j * dtheta;
@@ -1188,7 +1210,7 @@ public class GLUquadricImpl implements GLUquadric {
    */
   private void normal3f(GL gl, float x, float y, float z) {
     float mag;
-    
+
     mag = (float)Math.sqrt(x * x + y * y + z * z);
     if (mag > 0.00001F) {
       x /= mag;
diff --git a/src/jogl/classes/jogamp/opengl/glu/Glue.java b/src/jogl/classes/jogamp/opengl/glu/Glue.java
index 636d17f29..2ad3d8c89 100644
--- a/src/jogl/classes/jogamp/opengl/glu/Glue.java
+++ b/src/jogl/classes/jogamp/opengl/glu/Glue.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -89,15 +89,15 @@ public class Glue {
     "null control point reference",
     "duplicate point on piecewise linear trimming curve"
   } ;
-  
+
   /** Creates a new instance of Glue */
   public Glue() {
   }
-  
+
   public static String __gluNURBSErrorString( int errno ) {
     return( __gluNurbsErrors[ errno ] );
   }
-  
+
   private static String[] __gluTessErrors = {
     " ",
     "gluTessBeginPolygon() must precede a gluTessEndPolygon",
@@ -107,7 +107,7 @@ public class Glue {
     "a coordinate is too large",
     "need combine callback"
   };
-  
+
   public static String __gluTessErrorString( int errno ) {
     return( __gluTessErrors[ errno ] );
   }
diff --git a/src/jogl/classes/jogamp/opengl/glu/error/Error.java b/src/jogl/classes/jogamp/opengl/glu/error/Error.java
index 2f49db9a4..ffb8d9471 100644
--- a/src/jogl/classes/jogamp/opengl/glu/error/Error.java
+++ b/src/jogl/classes/jogamp/opengl/glu/error/Error.java
@@ -6,9 +6,9 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
@@ -24,13 +24,13 @@
  * except that Section 2.2 and 11 are omitted.  Any differences between
  * the Alternative License and the SGI License are offered solely by Sun
  * and not by SGI.
- * 
+ *
  * Original Code. The Original Code is: OpenGL Sample Implementation,
  * Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -53,7 +53,7 @@ import jogamp.opengl.glu.Glue;
  * @author  Administrator
  */
 public class Error {
-  
+
   private static String[] glErrorStrings = {
     "invalid enumerant",
     "invalid value",
@@ -63,7 +63,7 @@ public class Error {
     "out of memory",
     "invalid framebuffer operation"
   };
-  
+
   private static String[] gluErrorStrings = {
     "invalid enumerant",
     "invalid value",
@@ -71,11 +71,11 @@ public class Error {
     "",
     "invalid operation"
   };
-  
+
   /** Creates a new instance of Error */
   public Error() {
   }
-  
+
   public static String gluErrorString( int errorCode ) {
     if( errorCode == 0 ) {
       return( "no error" );
diff --git a/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2CurveEvaluator.java b/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2CurveEvaluator.java
index 2ef4468e5..4213dfd46 100644
--- a/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2CurveEvaluator.java
+++ b/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2CurveEvaluator.java
@@ -48,7 +48,7 @@ import javax.media.opengl.glu.gl2.GLUgl2;
 class GL2CurveEvaluator implements CurveEvaluator {
 
   /**
-   * Output triangles (for callback) or render curve 
+   * Output triangles (for callback) or render curve
    */
   private boolean output_triangles;
 
@@ -92,6 +92,7 @@ class GL2CurveEvaluator implements CurveEvaluator {
   /**
    * Pushes eval bit
    */
+  @Override
   public void bgnmap1f() {
     // DONE
     if (output_triangles) {
@@ -108,6 +109,7 @@ class GL2CurveEvaluator implements CurveEvaluator {
   /**
    * Pops all OpenGL attributes
    */
+  @Override
   public void endmap1f() {
     // DONE
     if (output_triangles) {
@@ -127,6 +129,7 @@ class GL2CurveEvaluator implements CurveEvaluator {
    * @param order curve order
    * @param ps control points
    */
+  @Override
   public void map1f(int type, float ulo, float uhi, int stride, int order,
                     CArrayOfFloats ps) {
     if (output_triangles) {
@@ -153,6 +156,7 @@ class GL2CurveEvaluator implements CurveEvaluator {
    * Calls opengl enable
    * @param type what to enable
    */
+  @Override
   public void enable(int type) {
     // DONE
     gl.glEnable(type);
@@ -164,6 +168,7 @@ class GL2CurveEvaluator implements CurveEvaluator {
    * @param u1 low u
    * @param u2 high u
    */
+  @Override
   public void mapgrid1f(int nu, float u1, float u2) {
     if (output_triangles) {
       //                System.out.println("TODO curveevaluator.mapgrid1f");
@@ -179,6 +184,7 @@ class GL2CurveEvaluator implements CurveEvaluator {
    * @param from lowest param
    * @param to highest param
    */
+  @Override
   public void mapmesh1f(int style, int from, int to) {
     /* //DEBUG drawing control points
        this.poradi++;
diff --git a/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2SurfaceEvaluator.java b/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2SurfaceEvaluator.java
index 155c4f9a9..e9c9fca3f 100644
--- a/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2SurfaceEvaluator.java
+++ b/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GL2SurfaceEvaluator.java
@@ -72,6 +72,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
   /**
    * Pushes eval bit
    */
+  @Override
   public void bgnmap2f() {
 
     if (output_triangles) {
@@ -88,6 +89,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
    * Sets  glPolygonMode
    * @param style polygon mode (N_MESHFILL/N_MESHLINE/N_MESHPOINT)
    */
+  @Override
   public void polymode(int style) {
     if (!output_triangles) {
       switch (style) {
@@ -109,6 +111,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
   /**
    * Pops all attributes
    */
+  @Override
   public void endmap2f() {
     // TODO Auto-generated method stub
     if (output_triangles) {
@@ -126,6 +129,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
    * @param vlo
    * @param vhi
    */
+  @Override
   public void domain2f(float ulo, float uhi, float vlo, float vhi) {
     // DONE
   }
@@ -139,6 +143,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
    * @param v0 lowest v
    * @param v1 highest v
    */
+  @Override
   public void mapgrid2f(int nu, float u0, float u1, int nv, float v0, float v1) {
 
     if (output_triangles) {
@@ -157,6 +162,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
    * @param vmin minimum V
    * @param vmax maximum V
    */
+  @Override
   public void mapmesh2f(int style, int umin, int umax, int vmin, int vmax) {
     if (output_triangles) {
       //            System.out.println("TODO openglsurfaceavaluator.mapmesh2f output_triangles");
@@ -195,6 +201,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
    * @param vorder surface order in v direction
    * @param pts control points
    */
+  @Override
   public void map2f(int type, float ulo, float uhi, int ustride, int uorder,
                     float vlo, float vhi, int vstride, int vorder, CArrayOfFloats pts) {
     // TODO Auto-generated method stub
@@ -210,6 +217,7 @@ class GL2SurfaceEvaluator implements SurfaceEvaluator {
    * Calls opengl enable
    * @param type what to enable
    */
+  @Override
   public void enable(int type) {
     //DONE
     gl.glEnable(type);
diff --git a/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GLUgl2nurbsImpl.java b/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GLUgl2nurbsImpl.java
index 58b565484..f83b3a805 100644
--- a/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GLUgl2nurbsImpl.java
+++ b/src/jogl/classes/jogamp/opengl/glu/gl2/nurbs/GLUgl2nurbsImpl.java
@@ -43,9 +43,9 @@ import javax.media.opengl.glu.GLUnurbs;
 
 /**
  * Base object for working with NURBS curves and surfaces
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class GLUgl2nurbsImpl implements GLUnurbs {
 
@@ -272,7 +272,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Sets domain distance for dom.dist. sampling in u direction
-   * 
+   *
    * @param d
    *            distance
    */
@@ -283,7 +283,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Sets domain distance for dom.dist. sampling in v direction
-   * 
+   *
    * @param d
    *            distance
    */
@@ -303,7 +303,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Calls a method with given name and passes argumet
-   * 
+   *
    * @param name
    *            name of a method to be called
    * @param arg
@@ -329,7 +329,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Calls a method with given name
-   * 
+   *
    * @param name
    *            name of a method to be called
    */
@@ -349,7 +349,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Begins a NURBS curve
-   * 
+   *
    * @param o_curve
    *            curve object
    */
@@ -381,7 +381,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Begins new surface
-   * 
+   *
    * @param o_surface
    *            surface object
    */
@@ -503,7 +503,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Method for handling error codes
-   * 
+   *
    * @param i
    *            error code
    */
@@ -539,7 +539,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Make a NURBS curve
-   * 
+   *
    * @param nknots
    *            number of knots in knot vector
    * @param knot
@@ -587,7 +587,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Check knot vector specification
-   * 
+   *
    * @param knots
    *            knot vector
    * @param msg
@@ -607,7 +607,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Draw a curve
-   * 
+   *
    * @param o_nurbscurve
    *            NURBS curve object
    */
@@ -660,7 +660,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Draw NURBS surface
-   * 
+   *
    * @param o_nurbssurface
    *            NURBS surface object
    */
@@ -704,7 +704,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Define a map of given properties
-   * 
+   *
    * @param type
    *            map type
    * @param rational
@@ -719,7 +719,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Set NURBS property
-   * 
+   *
    * @param type
    *            property type
    * @param tag
@@ -744,7 +744,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Set parameters of existing property
-   * 
+   *
    * @param prop
    *            property
    */
@@ -755,7 +755,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Set given property to rendering hints
-   * 
+   *
    * @param prop
    *            property to be set
    */
@@ -767,7 +767,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Sets wheteher we use domain distance sampling
-   * 
+   *
    * @param i
    *            domain distance sampling flag
    */
@@ -805,7 +805,7 @@ public class GLUgl2nurbsImpl implements GLUnurbs {
 
   /**
    * Make NURBS surface
-   * 
+   *
    * @param sknot_count
    *            number of knots in s direction
    * @param sknot
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/BuildMipmap.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/BuildMipmap.java
index f5fe17a7b..81a99beab 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/BuildMipmap.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/BuildMipmap.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -64,7 +64,7 @@ public class BuildMipmap {
   /** Creates a new instance of BuildMipmap */
   public BuildMipmap() {
   }
-  
+
   public static int gluBuild1DMipmapLevelsCore( GL gl, int target, int internalFormat,
                   int width, int widthPowerOf2, int format, int type, int userLevel,
                   int baseLevel, int maxLevel, ByteBuffer data ) {
@@ -78,34 +78,34 @@ public class BuildMipmap {
     int maxsize;
     int cmpts;
     PixelStorageModes psm = new PixelStorageModes();
-    
+
     assert( Mipmap.checkMipmapArgs( internalFormat, format, type ) == 0 );
     assert( width >= 1 );
-    
+
     newwidth = widthPowerOf2;
     levels = Mipmap.computeLog( newwidth );
-    
+
     levels += userLevel;
-    
+
     Mipmap.retrieveStoreModes( gl, psm );
     try {
-      newImage = Buffers.newDirectByteBuffer( Mipmap.image_size( width, 1, format, 
+      newImage = Buffers.newDirectByteBuffer( Mipmap.image_size( width, 1, format,
             GL2.GL_UNSIGNED_SHORT ) ).asShortBuffer();
     } catch( OutOfMemoryError ome ) {
       return( GLU.GLU_OUT_OF_MEMORY );
     }
     newImage_width = width;
-    
+
     Image.fill_image( psm, width, 1, format, type, Mipmap.is_index( format ), data, newImage );
     cmpts = Mipmap.elements_per_group( format, type );
     gl.glPixelStorei( GL2.GL_UNPACK_ALIGNMENT, 2 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_ROWS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, 0 );
-    
+
     // if swap_bytes was set, swapping occurred in fill_image
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, GL2.GL_FALSE );
-    
+
     for( level = userLevel; level <= levels; level++ ) {
       if( newImage_width == newwidth ) {
         // user newimage for this level
@@ -132,10 +132,10 @@ public class BuildMipmap {
         imageTemp = otherImage;
         otherImage = newImage;
         newImage = imageTemp;
-        
+
         newImage_width = newwidth;
         if( baseLevel <= level && level <= maxLevel ) {
-          gl.getGL2().glTexImage1D( target, level, internalFormat, newImage_width, 0, 
+          gl.getGL2().glTexImage1D( target, level, internalFormat, newImage_width, 0,
                             format, GL2.GL_UNSIGNED_SHORT, newImage );
         }
       }
@@ -148,10 +148,10 @@ public class BuildMipmap {
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, psm.getUnpackSkipPixels() );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, psm.getUnpackRowLength() );
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, (psm.getUnpackSwapBytes() ? 1 : 0) );
-    
+
     return( 0 );
   }
-  
+
   public static int bitmapBuild2DMipmaps( GL gl, int target, int internalFormat,
             int width, int height, int format, int type, ByteBuffer data ) {
     int newwidth[] = new int[1];
@@ -166,37 +166,37 @@ public class BuildMipmap {
     int maxsize;
     int cmpts;
     PixelStorageModes psm = new PixelStorageModes();
-    
+
     Mipmap.retrieveStoreModes( gl, psm );
-    
+
     Mipmap.closestFit( gl, target, width, height, internalFormat, format, type, newwidth, newheight );
-    
+
     levels = Mipmap.computeLog( newwidth[0] );
     level = Mipmap.computeLog( newheight[0] );
     if( level > levels ) {
       levels = level;
     }
-    
+
     try {
-      newImage = Buffers.newDirectByteBuffer( Mipmap.image_size( width, height, 
+      newImage = Buffers.newDirectByteBuffer( Mipmap.image_size( width, height,
             format, GL2.GL_UNSIGNED_SHORT ) ).asShortBuffer();
     } catch( OutOfMemoryError ome ) {
       return( GLU.GLU_OUT_OF_MEMORY );
     }
     newImage_width = width;
     newImage_height = height;
-    
+
     Image.fill_image( psm, width, height, format, type, Mipmap.is_index( format ), data, newImage );
-    
+
     cmpts = Mipmap.elements_per_group( format, type );
     gl.glPixelStorei( GL2.GL_UNPACK_ALIGNMENT, 2 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_ROWS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, 0 );
-    
+
     // if swap_bytes is set, swapping occurred in fill_image
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, GL2.GL_FALSE );
-    
+
     for( level = 0; level < levels; level++ ) {
       if( newImage_width == newwidth[0] && newImage_height == newheight[0] ) {
         newImage.rewind();
@@ -216,13 +216,13 @@ public class BuildMipmap {
             return( GLU.GLU_OUT_OF_MEMORY );
           }
         }
-        ScaleInternal.scale_internal( cmpts, newImage_width, newImage_height, 
+        ScaleInternal.scale_internal( cmpts, newImage_width, newImage_height,
                               newImage, newwidth[0], newheight[0], otherImage );
         // swap newImage and otherImage
         tempImage = otherImage;
         otherImage = newImage;
         newImage = tempImage;
-        
+
         newImage_width = newwidth[0];
         newImage_height = newheight[0];
         newImage.rewind();
@@ -241,10 +241,10 @@ public class BuildMipmap {
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, psm.getUnpackSkipPixels() );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, psm.getUnpackRowLength() );
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, (psm.getUnpackSwapBytes() ? 1 : 0) );
-    
+
     return( 0 );
   }
-  
+
   public static int gluBuild2DMipmapLevelsCore( GL gl, int target, int internalFormat,
                 int width, int height, int widthPowerOf2, int heightPowerOf2,
                 int format, int type, int userLevel, int baseLevel, int maxLevel,
@@ -263,19 +263,19 @@ public class BuildMipmap {
     int maxsize;
     int cmpts;
     int mark=-1;
-    
+
     boolean myswap_bytes;
     int groups_per_line, element_size, group_size;
     int rowsize, padding;
     PixelStorageModes psm = new PixelStorageModes();
-    
+
     assert( Mipmap.checkMipmapArgs( internalFormat, format, type ) == 0 );
     assert( width >= 1 && height >= 1 );
-    
+
     if( type == GL2.GL_BITMAP ) {
       return( bitmapBuild2DMipmaps( gl, target, internalFormat, width, height, format, type, data ) );
     }
-    
+
     newwidth = widthPowerOf2;
     newheight = heightPowerOf2;
     levels = Mipmap.computeLog( newwidth );
@@ -283,9 +283,9 @@ public class BuildMipmap {
     if( level > levels ) {
       levels = level;
     }
-    
+
     levels += userLevel;
-    
+
     Mipmap.retrieveStoreModes( gl, psm );
     myswap_bytes = psm.getUnpackSwapBytes();
     cmpts = Mipmap.elements_per_group( format, type );
@@ -294,28 +294,28 @@ public class BuildMipmap {
     } else {
       groups_per_line = width;
     }
-    
+
     element_size = Mipmap.bytes_per_element( type );
     group_size = element_size * cmpts;
     if( element_size == 1 ) {
       myswap_bytes = false;
     }
-    
+
     rowsize = groups_per_line * group_size;
     padding = ( rowsize % psm.getUnpackAlignment() );
     if( padding != 0 ) {
       rowsize += psm.getUnpackAlignment() - padding;
     }
-    
+
     mark = psm.getUnpackSkipRows() * rowsize + psm.getUnpackSkipPixels() * group_size;
     data.position( mark );
-    
+
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_ROWS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, 0 );
-    
+
     level = userLevel;
-    
+
     // already power of two square
     if( width == newwidth && height == newheight ) {
       // use usersImage for level userLevel
@@ -333,7 +333,7 @@ public class BuildMipmap {
       }
       int nextWidth = newwidth / 2;
       int nextHeight = newheight / 2;
-      
+
       // clamp to 1
       if( nextWidth < 1 ) {
         nextWidth = 1;
@@ -342,7 +342,7 @@ public class BuildMipmap {
         nextHeight = 1;
       }
       memReq = Mipmap.image_size( nextWidth, nextHeight, format, type );
-      
+
       try {
         switch( type ) {
           case( GL2.GL_UNSIGNED_BYTE ):
@@ -452,7 +452,7 @@ public class BuildMipmap {
       if( newheight < 1 ) {
         newheight = 1;
       }
-      
+
       myswap_bytes = false;
       rowsize = newwidth * group_size;
       memReq = Mipmap.image_size( newwidth, newheight, format, type );
@@ -498,7 +498,7 @@ public class BuildMipmap {
       level = userLevel + 1;
     } else { // user's image is not nice powerof2 size square
       memReq = Mipmap.image_size( newwidth, newheight, format, type );
-      try { 
+      try {
         switch( type ) {
           case( GL2.GL_UNSIGNED_BYTE ):
           case( GL2.GL_BYTE ):
@@ -535,15 +535,15 @@ public class BuildMipmap {
       data.position( mark );
       switch( type ) {
         case( GL2.GL_UNSIGNED_BYTE ):
-          ScaleInternal.scale_internal_ubyte( cmpts, width, height, data, 
+          ScaleInternal.scale_internal_ubyte( cmpts, width, height, data,
                 newwidth, newheight, dstImage, element_size, rowsize, group_size );
           break;
         case( GL2.GL_BYTE ):
-          ScaleInternal.scale_internal_byte( cmpts, width, height, data, newwidth, 
+          ScaleInternal.scale_internal_byte( cmpts, width, height, data, newwidth,
                   newheight, dstImage, element_size, rowsize, group_size );
           break;
         case( GL2.GL_UNSIGNED_SHORT ):
-          ScaleInternal.scale_internal_ushort( cmpts, width, height, data, newwidth, 
+          ScaleInternal.scale_internal_ushort( cmpts, width, height, data, newwidth,
                   newheight, dstImage.asShortBuffer(), element_size, rowsize, group_size, myswap_bytes );
           break;
         case( GL2.GL_SHORT ):
@@ -620,7 +620,7 @@ public class BuildMipmap {
       tempImage = srcImage;
       srcImage = dstImage;
       dstImage = tempImage;
-      
+
       if( levels != 0 ) { // use as little memory as possible
         int nextWidth = newwidth / 2;
         int nextHeight = newheight / 2;
@@ -630,7 +630,7 @@ public class BuildMipmap {
         if( nextHeight < 1 ) {
           nextHeight = 1;
         }
-        
+
         memReq = Mipmap.image_size( nextWidth, nextHeight, format, type );
         try {
           switch( type ) {
@@ -670,7 +670,7 @@ public class BuildMipmap {
       // level userLevel is in srcImage; nothing saved yet
       level = userLevel;
     }
-    
+
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, GL2.GL_FALSE );
     if( baseLevel <= level && level <= maxLevel ) {
       srcImage.rewind();
@@ -685,7 +685,7 @@ public class BuildMipmap {
         }
       }
     }
-    
+
     level++;  // update current level for the loop
     for( ; level <= levels; level++ ) {
       srcImage.rewind();
@@ -754,12 +754,12 @@ public class BuildMipmap {
           assert( false );
           break;
       }
-      
+
       // swap dstImage and srcImage
       tempImage = srcImage;
       srcImage = dstImage;
       dstImage = tempImage;
-      
+
       if( newwidth > 1 ) {
         newwidth /= 2;
         rowsize /= 2;
@@ -769,7 +769,7 @@ public class BuildMipmap {
       }
       // compute amount to pad per row if any
       int rowPad = rowsize % psm.getUnpackAlignment();
-      
+
       // should row be padded
       if( rowPad == 0 ) {
         // call teximage with srcImage untouched since its not padded
@@ -792,7 +792,7 @@ public class BuildMipmap {
         int ii, jj;
         int dstTrav;
         int srcTrav;
-        
+
         // allocate new image for mipmap of size newRowLength x newheight
         ByteBuffer newMipmapImage = null;
         try {
@@ -813,7 +813,7 @@ public class BuildMipmap {
             newMipmapImage.put( srcImage.get() );
           }
         }
-        
+
         // and use this new image for mipmapping instead
         if( baseLevel <= level && level <= maxLevel ) {
           newMipmapImage.rewind();
@@ -833,10 +833,10 @@ public class BuildMipmap {
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, psm.getUnpackSkipPixels() );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, psm.getUnpackRowLength() );
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, (psm.getUnpackSwapBytes() ? 1 : 0) );
-    
+
     return( 0 );
   }
-  
+
   public static int fastBuild2DMipmaps( GL gl, PixelStorageModes psm, int target,
           int components, int width, int height, int format, int type, ByteBuffer data ) {
     int[] newwidth = new int[1];
@@ -850,22 +850,22 @@ public class BuildMipmap {
     int memReq;
     int maxsize;
     int cmpts;
-    
-    Mipmap.closestFit( gl, target, width, height, components, format, type, newwidth, 
+
+    Mipmap.closestFit( gl, target, width, height, components, format, type, newwidth,
             newheight );
-    
+
     levels = Mipmap.computeLog( newwidth[0] );
     level = Mipmap.computeLog( newheight[0] );
     if( level > levels ) {
       levels = level;
     }
-    
+
     cmpts = Mipmap.elements_per_group( format, type );
-    
+
     otherImage = null;
     //  No need to copy the user data if its packed correctly.
     //  Make sure that later routines don't change that data.
-    
+
     if( psm.getUnpackSkipRows() == 0 && psm.getUnpackSkipPixels() == 0 ) {
       newImage = data;
       newImage_width = width;
@@ -878,7 +878,7 @@ public class BuildMipmap {
       int iter;
       int iter2;
       int i, j;
-      
+
       try {
         newImage = Buffers.newDirectByteBuffer( Mipmap.image_size(width, height, format, GL2.GL_UNSIGNED_BYTE ) );
       } catch( OutOfMemoryError err ) {
@@ -896,7 +896,7 @@ public class BuildMipmap {
       rowsize = group_per_line * cmpts;
       elements_per_line = width * cmpts;
       start = psm.getUnpackSkipRows() * rowsize + psm.getUnpackSkipPixels() * cmpts;
-      
+
       for( i = 0; i < height; i++ ) {
         iter = start;
         data.position( iter );
@@ -906,13 +906,13 @@ public class BuildMipmap {
         start += rowsize;
       }
     }
-    
+
     gl.glPixelStorei( GL2.GL_UNPACK_ALIGNMENT, 1 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_ROWS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, GL2.GL_FALSE );
-    
+
     for( level = 0; level <= levels; level++ ) {
       if( newImage_width == newwidth[0] && newImage_height == newheight[0] ) {
         // use newImage for this level
@@ -937,7 +937,7 @@ public class BuildMipmap {
         imageTemp = otherImage;
         otherImage = newImage;
         newImage = imageTemp;
-        
+
         newImage_width = newwidth[0];
         newImage_height = newheight[0];
         newImage.rewind();
@@ -956,10 +956,10 @@ public class BuildMipmap {
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, psm.getUnpackSkipPixels() );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, psm.getUnpackRowLength() );
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, ( psm.getUnpackSwapBytes() ? 1 : 0 ) ) ;
-    
+
     return( 0 );
   }
-  
+
   public static int gluBuild3DMipmapLevelsCore( GL gl, int target, int internalFormat,
           int width, int height, int depth, int widthPowerOf2, int heightPowerOf2,
           int depthPowerOf2, int format, int type, int userLevel, int baseLevel,
@@ -977,19 +977,19 @@ public class BuildMipmap {
     int maxSize;
     int cmpts;
     int mark=-1;
-    
+
     boolean myswapBytes;
     int groupsPerLine, elementSize, groupSize;
     int rowsPerImage, imageSize;
     int rowSize, padding;
     PixelStorageModes psm = new PixelStorageModes();
-    
+
     assert( Mipmap.checkMipmapArgs( internalFormat, format, type ) == 0 );
     assert( width >= 1 && height >= 1 && depth >= 1 );
     assert( type != GL2.GL_BITMAP );
-    
+
     srcImage = dstImage = null;
-    
+
     newWidth = widthPowerOf2;
     newHeight = heightPowerOf2;
     newDepth = depthPowerOf2;
@@ -1002,9 +1002,9 @@ public class BuildMipmap {
     if( level > levels ) {
       levels = level;
     }
-    
+
     levels += userLevel;
-    
+
     Mipmap.retrieveStoreModes3D( gl, psm );
     myswapBytes = psm.getUnpackSwapBytes();
     cmpts = Mipmap.elements_per_group( format, type );
@@ -1013,42 +1013,42 @@ public class BuildMipmap {
     } else {
       groupsPerLine = width;
     }
-    
+
     elementSize = Mipmap.bytes_per_element( type );
     groupSize = elementSize * cmpts;
     if( elementSize == 1 ) {
       myswapBytes = false;
     }
-    
+
     // 3dstuff
     if( psm.getUnpackImageHeight() > 0 ) {
       rowsPerImage = psm.getUnpackImageHeight();
     } else {
       rowsPerImage = height;
     }
-    
+
     rowSize = groupsPerLine * groupSize;
     padding = ( rowSize % psm.getUnpackAlignment() );
     if( padding != 0 ) {
       rowSize += psm.getUnpackAlignment() - padding;
     }
-    
+
     imageSize = rowsPerImage * rowSize;
-    
+
     usersImage = ByteBuffer.wrap(data.array());
     mark = psm.getUnpackSkipRows() * rowSize +
            psm.getUnpackSkipPixels() * groupSize +
            psm.getUnpackSkipImages() * imageSize;
     usersImage.position( mark );
-    
+
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_ROWS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_PIXELS, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_ROW_LENGTH, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_SKIP_IMAGES, 0 );
     gl.glPixelStorei( GL2.GL_UNPACK_IMAGE_HEIGHT, 0 );
-    
+
     level = userLevel;
-    
+
     if( width == newWidth && height == newHeight && depth == newDepth ) {
       // use usersImage for level userlevel
       if( baseLevel <= level && level <= maxLevel ) {
@@ -1068,7 +1068,7 @@ public class BuildMipmap {
       int nextWidth = newWidth / 2;
       int nextHeight = newHeight / 2;
       int nextDepth = newDepth / 2;
-      
+
       // clamp to one
       if( nextWidth < 1 ) {
         nextWidth = 1;
@@ -1116,13 +1116,13 @@ public class BuildMipmap {
         gl.glPixelStorei( GL2.GL_UNPACK_IMAGE_HEIGHT, psm.getUnpackImageHeight() );
         return( GLU.GLU_OUT_OF_MEMORY );
       }
-      
+
       if( dstImage != null ) {
         switch( type ) {
           case( GL2.GL_UNSIGNED_BYTE ):
             if( depth > 1 ) {
               HalveImage.halveImage3D( cmpts, new ExtractUByte(), width, height, depth,
-                      usersImage, dstImage, elementSize, 
+                      usersImage, dstImage, elementSize,
                       groupSize, rowSize, imageSize, myswapBytes );
             } else {
               HalveImage.halveImage_ubyte( cmpts, width, height, usersImage,
@@ -1145,7 +1145,7 @@ public class BuildMipmap {
                       usersImage, dstImage, elementSize, groupSize, rowSize,
                       imageSize, myswapBytes );
             } else {
-              HalveImage.halveImage_ushort( cmpts, width, height, usersImage, 
+              HalveImage.halveImage_ushort( cmpts, width, height, usersImage,
                       dstImage.asShortBuffer(), elementSize, rowSize, groupSize, myswapBytes );
             }
             break;
@@ -1257,7 +1257,7 @@ public class BuildMipmap {
       if( newDepth < 1 ) {
         newDepth = 1;
       }
-      
+
       myswapBytes = false;
       rowSize = newWidth * groupSize;
       imageSize = rowSize * newHeight;
@@ -1302,7 +1302,7 @@ public class BuildMipmap {
         gl.glPixelStorei( GL2.GL_UNPACK_IMAGE_HEIGHT, psm.getUnpackImageHeight() );
         return( GLU.GLU_OUT_OF_MEMORY );
       }
-      
+
       // level userLevel + 1 is in srcImage; level userLevel already saved
       level = userLevel + 1;
     } else {
@@ -1343,10 +1343,10 @@ public class BuildMipmap {
         gl.glPixelStorei( GL2.GL_UNPACK_IMAGE_HEIGHT, psm.getUnpackImageHeight() );
         return( GLU.GLU_OUT_OF_MEMORY );
       }
-      
+
       ScaleInternal.gluScaleImage3D( gl, format, width, height, depth, type,
               usersImage, newWidth, newHeight, newDepth, type, dstImage );
-      
+
       myswapBytes = false;
       rowSize = newWidth * groupSize;
       imageSize = rowSize * newHeight;
@@ -1354,7 +1354,7 @@ public class BuildMipmap {
       tempImage = srcImage;
       srcImage = dstImage;
       dstImage = tempImage;
-      
+
       if( levels != 0 ) {
         int nextWidth = newWidth / 2;
         int nextHeight = newHeight / 2;
@@ -1409,7 +1409,7 @@ public class BuildMipmap {
       // level userLevel is in srcImage; nothing saved yet
       level = userLevel;
     }
-    
+
     gl.glPixelStorei( GL2.GL_UNPACK_SWAP_BYTES, GL2.GL_FALSE );
     if( baseLevel <= level && level <= maxLevel ) {
       usersImage.position( mark );
@@ -1541,11 +1541,11 @@ public class BuildMipmap {
           assert( false );
           break;
       }
-      
+
       tempImage = srcImage;
       srcImage = dstImage;
       dstImage = tempImage;
-      
+
       if( newWidth > 1 ) {
         newWidth /= 2;
         rowSize /= 2;
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract.java
index a564269fb..0eee9bf32 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1010102.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1010102.java
index 10ea1d729..0c155ff96 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1010102.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1010102.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class Extract1010102 implements Extract {
-  
+
   /** Creates a new instance of Extract1010102 */
   public Extract1010102() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     long uint = 0;
-    
+
     if( isSwap ) {
       uint = 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( packedPixel.getInt() );
     } else {
       uint = 0x00000000FFFFFFFF & packedPixel.getInt();
     }
-    
+
     // 11111111,11000000,00000000,00000000 == 0xFFC00000
     // 00000000,00111111,11110000,00000000 == 0x003F0000
     // 00000000,00000000,00001111,11111100 == 0x00000FFC
     // 00000000,00000000,00000000,00000011 == 0x00000003
-    
+
     extractComponents[0] = (float)( ( uint & 0xFFC00000 ) >> 22 ) / 1023.0f;
     extractComponents[1] = (float)( ( uint & 0x003FF000 ) >> 12 ) / 1023.0f;
     extractComponents[2] = (float)( ( uint & 0x00000FFC ) >>  2 ) / 1023.0f;
     extractComponents[3] = (float)( ( uint & 0x00000003 )       ) / 3.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     long uint = (((int)((shoveComponents[0] * 1023) + 0.5f) << 22) & 0xFFC00000 );
     uint |= (((int)((shoveComponents[1] * 1023) + 0.5f) <<   12) & 0x003FF000 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1555rev.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1555rev.java
index 1234da5f8..5208ea537 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1555rev.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract1555rev.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class Extract1555rev implements Extract {
-  
+
   /** Creates a new instance of Extract1555rev */
   public Extract1555rev() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     int ushort = 0;
-    
+
     if( isSwap ) {
       ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
     } else {
       ushort = 0x0000FFFF & packedPixel.getShort();
     }
-    
+
     // 00000000,00011111 == 0x001F
     // 00000011,11100000 == 0x03E0
     // 01111100,00000000 == 0x7C00
     // 10000000,00000000 == 0x8000
-    
+
     extractComponents[0] = (float)( ( ushort & 0x001F )       ) / 31.0f;
     extractComponents[1] = (float)( ( ushort & 0x003E ) >>  5 ) / 31.0f;
     extractComponents[2] = (float)( ( ushort & 0x7C00 ) >>  10) / 31.0f;
     extractComponents[3] = (float)( ( ushort & 0x8000 ) >>  15);
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 00000000,00011111 == 0x001F
     // 00000011,11100000 == 0x03E0
     // 01111100,00000000 == 0x7C00
     // 10000000,00000000 == 0x8000
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     int ushort = (((int)((shoveComponents[0] * 31) + 0.5f)   ) & 0x0000001F );
     ushort |= (((int)((shoveComponents[1] * 31) + 0.5f) <<  5) & 0x000003E0 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract2101010rev.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract2101010rev.java
index 226254f99..1bf8abcc3 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract2101010rev.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract2101010rev.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class Extract2101010rev implements Extract {
-  
+
   /** Creates a new instance of Extract2101010 */
   public Extract2101010rev() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     long uint = 0;
-    
+
     if( isSwap ) {
       uint = 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( packedPixel.getInt() );
     } else {
       uint = 0x00000000FFFFFFFF & packedPixel.getInt();
     }
-    
+
     // 11111111,11000000,00000000,00000000 == 0xFFC00000
     // 00000000,00111111,11110000,00000000 == 0x003F0000
     // 00000000,00000000,00001111,11111100 == 0x00000FFC
     // 00000000,00000000,00000000,00000011 == 0x00000003
-    
+
     extractComponents[0] = (float)( ( uint & 0x000003FF )       ) / 1023.0f;
     extractComponents[1] = (float)( ( uint & 0x000FFC00 ) >> 10 ) / 1023.0f;
     extractComponents[2] = (float)( ( uint & 0x3FF00000 ) >> 20 ) / 1023.0f;
     extractComponents[3] = (float)( ( uint & 0xC0000000 ) >> 30 ) / 3.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     long uint = (((int)((shoveComponents[0] * 1023) + 0.5f)    ) & 0x000003FF );
     uint |= (((int)((shoveComponents[1] * 1023) + 0.5f) <<   10) & 0x000FFC00 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract233rev.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract233rev.java
index 9fa2a3a54..c86b39e63 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract233rev.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract233rev.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class Extract233rev implements Extract {
-  
+
   /** Creates a new instance of Extract223rev */
   public Extract233rev() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     // 11100000 == 0xe0
     // 00011100 == 0x1c
@@ -65,16 +66,17 @@ public class Extract233rev implements Extract {
     extractComponents[1] = (float)((ubyte & 0x38) >> 3) / 7.0f;
     extractComponents[2] = (float)((ubyte & 0xC0) >> 6) / 3.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11100000 == 0xE0
     // 00011100 == 0x1C
     // 00000011 == 0x03
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     byte b = (byte)( ( (int)( ( shoveComponents[0] * 7 ) + 0.5f ) ) & 0x07 );
     b |= (byte)( ( (int)( ( shoveComponents[1] * 7 ) + 0.5f ) << 3 ) & 0x38 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract332.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract332.java
index 92d141be5..706f0c3f2 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract332.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract332.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class Extract332 implements Extract {
-  
+
   /** Creates a new instance of Extract332 */
   public Extract332() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     // 11100000 == 0xe0
     // 00011100 == 0x1c
@@ -65,16 +66,17 @@ public class Extract332 implements Extract {
     extractComponents[1] = (float)((ubyte & 0x1c) >> 2) / 7.0f;
     extractComponents[2] = (float)((ubyte & 0x03)) / 3.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11100000 == 0xE0
     // 00011100 == 0x1C
     // 00000011 == 0x03
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     byte b = (byte)( ( (int)( ( shoveComponents[0] * 7 ) + 0.5f ) << 5 ) & 0xE0 );
     b |= (byte)( ( (int)( ( shoveComponents[1] * 7 ) + 0.5f ) << 2 ) & 0x1C );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444.java
index af99d154c..182d66ce2 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,41 +51,43 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract4444 implements Extract {
-  
+
   /** Creates a new instance of Extract4444 */
   public Extract4444() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     int ushort = 0;
-    
+
     if( isSwap ) {
       ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
     } else {
       ushort = 0x0000FFFF & packedPixel.getShort();
     }
-    
+
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     extractComponents[0] = (float)( ( ushort & 0xF000 ) >> 12 ) / 15.0f;
     extractComponents[1] = (float)( ( ushort & 0x0F00 ) >> 8  ) / 15.0f;
     extractComponents[2] = (float)( ( ushort & 0x00F0 ) >> 4  ) / 15.0f;
     extractComponents[3] = (float)( ( ushort & 0x000F )       ) / 15.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     int ushort = (((int)((shoveComponents[0] * 15) + 0.5f) << 12) & 0x0000F000 );
     ushort |= (((int)((shoveComponents[1] * 15) + 0.5f) << 8) & 0x00000F00 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444rev.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444rev.java
index e5bce60d8..52ecdc17c 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444rev.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract4444rev.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract4444rev implements Extract {
-  
+
   /** Creates a new instance of Extract4444rev */
   public Extract4444rev() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     int ushort = 0;
-    
+
     if( isSwap ) {
       ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
     } else {
       ushort = 0x0000FFFF & packedPixel.getShort();
     }
-    
+
     // 00000000,00001111 == 0x000F
     // 00000000,11110000 == 0x00F0
     // 00001111,00000000 == 0x0F00
     // 11110000,00000000 == 0xF000
-    
+
     extractComponents[0] = (float)( ( ushort & 0x000F )       ) / 15.0f;
     extractComponents[1] = (float)( ( ushort & 0x00F0 ) >> 4  ) / 15.0f;
     extractComponents[2] = (float)( ( ushort & 0x0F00 ) >> 8  ) / 15.0f;
     extractComponents[3] = (float)( ( ushort & 0xF000 ) >> 12 ) / 15.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     int ushort = (((int)((shoveComponents[0] * 15) + 0.5f)   ) & 0x0000000F );
     ushort |= (((int)((shoveComponents[1] * 15) + 0.5f) <<  4) & 0x000000F0 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract5551.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract5551.java
index 5c383103e..21f53aa1d 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract5551.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract5551.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract5551 implements Extract {
-  
+
   /** Creates a new instance of Extract5551 */
   public Extract5551() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     int ushort = 0;
-    
+
     if( isSwap ) {
       ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
     } else {
       ushort = 0x0000FFFF & packedPixel.getShort();
     }
-    
+
     // 11111000,00000000 == 0xF800
     // 00000111,11000000 == 0x07C0
     // 00000000,00111110 == 0x003E
     // 00000000,00000001 == 0x0001
-    
+
     extractComponents[0] = (float)( ( ushort & 0xF800 ) >> 11 ) / 31.0f;
     extractComponents[1] = (float)( ( ushort & 0x00F0 ) >>  6 ) / 31.0f;
     extractComponents[2] = (float)( ( ushort & 0x0F00 ) >>  1 ) / 31.0f;
     extractComponents[3] = (float)( ( ushort & 0xF000 )       );
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     int ushort = (((int)((shoveComponents[0] * 31) + 0.5f) << 11) & 0x0000F800 );
     ushort |= (((int)((shoveComponents[1] * 31) + 0.5f) <<  6) & 0x000007C0 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565.java
index f6193dd2d..7408c45b2 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,38 +51,40 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract565 implements Extract {
-  
+
   /** Creates a new instance of Extract565 */
   public Extract565() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     int ushort = 0;
-    
+
     if( isSwap ) {
       ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
     } else {
       ushort = 0x0000FFFF & packedPixel.getShort();
     }
-    
+
     // 11111000,00000000 == 0xF800
     // 00000111,11100000 == 0x07E0
     // 00000000,00111111 == 0x001F
-    
+
     extractComponents[0] = (float)( ( ushort & 0xF800 ) >> 11 ) / 31.0f;
     extractComponents[1] = (float)( ( ushort & 0x07E0 ) >> 5 ) / 63.0f;
     extractComponents[2] = (float)( ( ushort & 0x001F ) ) / 31.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11111000,00000000 == 0xF800
     // 00000111,11100000 == 0x07E0
     // 00000000,00111111 == 0x001F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     int ushort = (((int)((shoveComponents[0] * 31) + 0.5f) << 11) & 0x0000F800 );
     ushort |= (((int)((shoveComponents[1] * 63) + 0.5f) << 5) & 0x000007E0 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565rev.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565rev.java
index 2e455adfa..adaafa7ea 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565rev.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract565rev.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,38 +51,40 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract565rev implements Extract {
-  
+
   /** Creates a new instance of Extract565rev */
   public Extract565rev() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     int ushort = 0;
-    
+
     if( isSwap ) {
       ushort = 0x0000FFFF & Mipmap.GLU_SWAP_2_BYTES( packedPixel.getShort() );
     } else {
       ushort = 0x0000FFFF & packedPixel.getShort();
     }
-    
+
     // 00000000,00011111 == 0x001F
     // 00000111,11100000 == 0x07E0
     // 11111000,00000000 == 0xF800
-    
+
     extractComponents[0] = (float)( ( ushort & 0x001F ) ) / 31.0f;
     extractComponents[1] = (float)( ( ushort & 0x07E0 ) >> 5 ) / 63.0f;
     extractComponents[2] = (float)( ( ushort & 0xF800 ) >> 11 ) / 31.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 00000000,00111111 == 0x001F
     // 00000111,11100000 == 0x07E0
     // 11111000,00000000 == 0xF800
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     int ushort = (((int)((shoveComponents[0] * 31) + 0.5f) ) & 0x0000001F );
     ushort |= (((int)((shoveComponents[1] * 63) + 0.5f) << 5) & 0x000007E0 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888.java
index 137fa3c21..be155d578 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract8888 implements Extract {
-  
+
   /** Creates a new instance of Extract8888 */
   public Extract8888() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     long uint = 0;
-    
+
     if( isSwap ) {
       uint = 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( packedPixel.getInt() );
     } else {
       uint = 0x00000000FFFFFFFF & packedPixel.getInt();
     }
-    
+
     // 11111000,00000000 == 0xF800
     // 00000111,11000000 == 0x07C0
     // 00000000,00111110 == 0x003E
     // 00000000,00000001 == 0x0001
-    
+
     extractComponents[0] = (float)( ( uint & 0xFF000000 ) >> 24 ) / 255.0f;
     extractComponents[1] = (float)( ( uint & 0x00FF0000 ) >> 16 ) / 255.0f;
     extractComponents[2] = (float)( ( uint & 0x0000FF00 ) >>  8 ) / 255.0f;
     extractComponents[3] = (float)( ( uint & 0x000000FF )       ) / 255.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     long uint = (((int)((shoveComponents[0] * 255) + 0.5f) << 24) & 0xFF000000 );
     uint |= (((int)((shoveComponents[1] * 255) + 0.5f) <<   16) & 0x00FF0000 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888rev.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888rev.java
index 2ac942c84..294e60e12 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888rev.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Extract8888rev.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,42 +51,44 @@ import java.nio.*;
  * @author Administrator
  */
 public class Extract8888rev implements Extract {
-  
+
   /** Creates a new instance of Extract8888rev */
   public Extract8888rev() {
   }
-  
+
+  @Override
   public void extract( boolean isSwap, ByteBuffer packedPixel, float[] extractComponents ) {
     long uint = 0;
-    
+
     if( isSwap ) {
       uint = 0x00000000FFFFFFFF & Mipmap.GLU_SWAP_4_BYTES( packedPixel.getInt() );
     } else {
       uint = 0x00000000FFFFFFFF & packedPixel.getInt();
     }
-    
+
     // 11111000,00000000 == 0xF800
     // 00000111,11000000 == 0x07C0
     // 00000000,00111110 == 0x003E
     // 00000000,00000001 == 0x0001
-    
+
     extractComponents[0] = (float)( ( uint & 0x000000FF )       ) / 255.0f;
     extractComponents[1] = (float)( ( uint & 0x0000FF00 ) >>  8 ) / 255.0f;
     extractComponents[2] = (float)( ( uint & 0x00FF0000 ) >> 16 ) / 255.0f;
     extractComponents[3] = (float)( ( uint & 0xFF000000 ) >> 24 ) / 255.0f;
   }
-  
+
+  @Override
   public void shove( float[] shoveComponents, int index, ByteBuffer packedPixel ) {
     // 11110000,00000000 == 0xF000
     // 00001111,00000000 == 0x0F00
     // 00000000,11110000 == 0x00F0
     // 00000000,00001111 == 0x000F
-    
+
     assert( 0.0f <= shoveComponents[0] && shoveComponents[0] <= 1.0f );
     assert( 0.0f <= shoveComponents[1] && shoveComponents[1] <= 1.0f );
     assert( 0.0f <= shoveComponents[2] && shoveComponents[2] <= 1.0f );
     assert( 0.0f <= shoveComponents[3] && shoveComponents[3] <= 1.0f );
-    
+
     // due to limited precision, need to round before shoving
     long uint = (((int)((shoveComponents[0] * 255) + 0.5f)    ) & 0x000000FF );
     uint |= (((int)((shoveComponents[1] * 255) + 0.5f) <<    8) & 0x0000FF00 );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractFloat.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractFloat.java
index 52c2191b9..1dd8bff8a 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractFloat.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractFloat.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.*;
  * @author Administrator
  */
 public class ExtractFloat implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtractFloat */
   public ExtractFloat() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer data ) {
     float f = 0;
     if( isSwap ) {
@@ -66,7 +67,8 @@ public class ExtractFloat implements ExtractPrimitive {
     assert( f <= 1.0f );
     return( f );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     assert(0.0 <= value && value < 1.0);
     data.asFloatBuffer().put( index, (float)value );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractPrimitive.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractPrimitive.java
index 926096649..a44fb9508 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractPrimitive.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractPrimitive.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSByte.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSByte.java
index 2e1a9a0a6..dcbe52a40 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSByte.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSByte.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,17 +51,19 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class ExtractSByte implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtractUByte */
   public ExtractSByte() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer sbyte ) {
     byte b = sbyte.get();
     assert( b <= 127 );
     return( b );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     data.position( index );
     data.put( (byte)value );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSInt.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSInt.java
index ca80747c4..547bd944a 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSInt.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSInt.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.*;
  * @author Administrator
  */
 public class ExtractSInt implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtractSInt */
   public ExtractSInt() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer uint ) {
     int i = 0;
     if( isSwap ) {
@@ -66,7 +67,8 @@ public class ExtractSInt implements ExtractPrimitive {
     assert( i <= 0x7FFFFFFF );
     return( i );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     assert(0.0 <= value && value < Integer.MAX_VALUE);
     IntBuffer ib = data.asIntBuffer();
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSShort.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSShort.java
index 979c3b449..7dc172976 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSShort.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractSShort.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.*;
  * @author Administrator
  */
 public class ExtractSShort implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtractSShort */
   public ExtractSShort() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer ushort ) {
     short s = 0;
     if( isSwap ) {
@@ -66,7 +67,8 @@ public class ExtractSShort implements ExtractPrimitive {
     assert( s <= 32767 );
     return( s );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     assert(0.0 <= value && value < 32768.0);
     ShortBuffer sb = data.asShortBuffer();
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUByte.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUByte.java
index 4d14212ab..3e933811c 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUByte.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUByte.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,17 +51,19 @@ import java.nio.ByteBuffer;
  * @author Administrator
  */
 public class ExtractUByte implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtractUByte */
   public ExtractUByte() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer ubyte ) {
     int i = 0x000000FF & ubyte.get();
     assert( i <= 255 );
     return( i );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     assert(0.0 <= value && value < 256.0);
     data.position( index );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUInt.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUInt.java
index c088ca301..1c34828b3 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUInt.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUInt.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.*;
  * @author Administrator
  */
 public class ExtractUInt implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtractUInt */
   public ExtractUInt() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer uint ) {
     long i = 0;
     if( isSwap ) {
@@ -66,7 +67,8 @@ public class ExtractUInt implements ExtractPrimitive {
     assert( i <= 0xFFFFFFFF );
     return( i );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     assert(0.0 <= value && value < 0xFFFFFFFF);
     IntBuffer ib = data.asIntBuffer();
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUShort.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUShort.java
index 81db60f0f..8e0d25c42 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUShort.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ExtractUShort.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,12 @@ import java.nio.*;
  * @author Administrator
  */
 public class ExtractUShort implements ExtractPrimitive {
-  
+
   /** Creates a new instance of ExtracUShort */
   public ExtractUShort() {
   }
-  
+
+  @Override
   public double extract( boolean isSwap, ByteBuffer ushort ) {
     int i = 0;
     if( isSwap ) {
@@ -66,7 +67,8 @@ public class ExtractUShort implements ExtractPrimitive {
     assert( i <= 65535 );
     return( i );
   }
-  
+
+  @Override
   public void shove( double value, int index, ByteBuffer data ) {
     assert(0.0 <= value && value < 65536.0);
     ShortBuffer sb = data.asShortBuffer();
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/HalveImage.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/HalveImage.java
index 7549044ba..184c5fda8 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/HalveImage.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/HalveImage.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -52,11 +52,11 @@ import java.nio.*;
  * @author  Administrator
  */
 public class HalveImage {
-  
+
   private static final int BOX2 = 2;
   private static final int BOX4 = 4;
   private static final int BOX8 = 8;
-  
+
   public static void halveImage( int components, int width, int height,
           ShortBuffer datain, ShortBuffer dataout ) {
     int i, j, k;
@@ -64,11 +64,11 @@ public class HalveImage {
     int delta;
     int t = 0;
     short temp = 0;
-    
+
     newwidth = width / 2;
     newheight = height /2;
     delta = width * components;
-    
+
     // Piece of cake
     for( i = 0; i < newheight; i++ ) {
       for( j = 0; j < newwidth; j++ ) {
@@ -91,7 +91,7 @@ public class HalveImage {
       t += delta;
     }
   }
-  
+
   public static void halveImage_ubyte( int components, int width, int height,
                                       ByteBuffer datain, ByteBuffer dataout,
                                       int element_size, int ysize, int group_size ) {
@@ -99,19 +99,19 @@ public class HalveImage {
     int newwidth, newheight;
     int s;
     int t;
-    
+
     // Handle case where there is only 1 column/row
     if( width == 1 || height == 1 ) {
       assert( !( width == 1 && height == 1 ) ); // can't be 1x1
       halve1Dimage_ubyte( components, width, height, datain, dataout, element_size, ysize, group_size );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
     s = 0;
     t = 0;
-    
+
     int temp = 0;
     // piece of cake
     for( i = 0; i < newheight; i++ ) {
@@ -133,9 +133,9 @@ public class HalveImage {
       t += ysize;
     }
   }
-  
+
   public static void halve1Dimage_ubyte( int components, int width, int height,
-                      ByteBuffer datain, ByteBuffer dataout, 
+                      ByteBuffer datain, ByteBuffer dataout,
                       int element_size, int ysize, int group_size ) {
     int halfWidth = width / 2;
     int halfHeight = height / 2;
@@ -143,14 +143,14 @@ public class HalveImage {
     int dest = 0;
     int jj;
     int temp = 0;
-    
+
     assert( width == 1 || height == 1 ); // Must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // widthxheight can't be 1x1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -161,7 +161,7 @@ public class HalveImage {
           temp /= 2;
           dataout.put( (byte)temp );
           /*
-          dataout.setByte( (byte)(((0x000000FF & datain.setIndexInBytes(src).getByte()) + 
+          dataout.setByte( (byte)(((0x000000FF & datain.setIndexInBytes(src).getByte()) +
                     (0x000000FF & datain.setIndexInBytes( src + group_size ).getByte())) / 2 ) );
            */
           src += element_size;
@@ -188,7 +188,7 @@ public class HalveImage {
           temp /= 2;
           dataout.put( (byte)temp );
           /*
-          dataout.setByte( (byte)(((0x000000FF & datain.setIndexInBytes(src).getByte()) + 
+          dataout.setByte( (byte)(((0x000000FF & datain.setIndexInBytes(src).getByte()) +
                     (0x000000FF & datain.setIndexInBytes(src + ysize).getByte()) ) / 2 ) );
            */
           src += element_size;
@@ -202,7 +202,7 @@ public class HalveImage {
     assert( src == ysize * height );
     assert( dest == components * element_size * halfWidth * halfHeight );
   }
-  
+
   public static void halveImage_byte( int components, int width, int height,
                     ByteBuffer datain, ByteBuffer dataout, int element_size,
                     int ysize, int group_size ) {
@@ -211,7 +211,7 @@ public class HalveImage {
     int s = 0;
     int t = 0;
     byte temp = (byte)0;
-    
+
     // handle case where there is only 1 column
     if( width == 1 || height == 1 ) {
       assert( !( width == 1 && height == 1 ) );
@@ -219,10 +219,10 @@ public class HalveImage {
                                                             ysize, group_size );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
-    
+
     for( i = 0; i < newheight; i++ ) {
       for( j = 0; j < newwidth; j++ ) {
         for( k = 0; k < components; k++ ) {
@@ -244,7 +244,7 @@ public class HalveImage {
       t += ysize;
     }
   }
-  
+
   public static void halve1Dimage_byte( int components, int width, int height,
                       ByteBuffer datain, ByteBuffer dataout,
                       int element_size, int ysize, int group_size ) {
@@ -254,14 +254,14 @@ public class HalveImage {
     int dest = 0;
     int jj;
     byte temp = (byte)0;
-    
+
     assert( width == 1 || height == 1 ); // must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // widthxheight can't be 1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -284,7 +284,7 @@ public class HalveImage {
       halfWidth = 1;
       // one vertical column with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -303,7 +303,7 @@ public class HalveImage {
     }
     assert( dest == components * element_size * halfWidth * halfHeight );
   }
-  
+
   public static void halveImage_ushort( int components, int width, int height,
                           ByteBuffer datain, ShortBuffer dataout, int element_size,
                           int ysize, int group_size, boolean myswap_bytes ) {
@@ -319,10 +319,10 @@ public class HalveImage {
                                 ysize, group_size, myswap_bytes );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
-    
+
     // Piece of cake
     if( !myswap_bytes ) {
       for( i = 0; i < newheight; i++ ) {
@@ -364,7 +364,7 @@ public class HalveImage {
       }
     }
   }
-  
+
   public static void halve1Dimage_ushort( int components, int width, int height,
                       ByteBuffer datain, ShortBuffer dataout, int element_size,
                       int ysize, int group_size, boolean myswap_bytes ) {
@@ -373,14 +373,14 @@ public class HalveImage {
     int src = 0;
     int dest = 0;
     int jj;
-    
+
     assert( width == 1 || height == 1 ); // must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // widthxheight can't be 1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < halfHeight; kk++ ) {
@@ -410,7 +410,7 @@ public class HalveImage {
       halfWidth = 1;
       // one vertical column with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -437,7 +437,7 @@ public class HalveImage {
     }
     assert( dest == components * element_size * halfWidth * halfHeight );
   }
-  
+
   public static void halveImage_short( int components, int width, int height,
                         ByteBuffer datain, ShortBuffer dataout, int element_size,
                         int ysize, int group_size, boolean myswap_bytes ) {
@@ -453,10 +453,10 @@ public class HalveImage {
                             ysize, group_size, myswap_bytes );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
-    
+
     // Piece of cake
     if( !myswap_bytes ) {
       for( i = 0; i < newheight; i++ ) {
@@ -504,7 +504,7 @@ public class HalveImage {
       }
     }
   }
-  
+
   public static void halve1Dimage_short( int components, int width, int height,
               ByteBuffer datain, ShortBuffer dataout, int element_size, int ysize,
               int group_size, boolean myswap_bytes ) {
@@ -513,14 +513,14 @@ public class HalveImage {
     int src = 0;
     int dest = 0;
     int jj;
-    
+
     assert( width == 1 || height == 1 ); // must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // can't be 1x1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -550,7 +550,7 @@ public class HalveImage {
       halfWidth = 1;
       // one vertical column with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -577,7 +577,7 @@ public class HalveImage {
     }
     assert( dest == ( components * element_size * halfWidth * halfHeight ) );
   }
-  
+
   public static void halveImage_uint( int components, int width, int height,
                           ByteBuffer datain, IntBuffer dataout, int element_size,
                           int ysize, int group_size, boolean myswap_bytes ) {
@@ -586,7 +586,7 @@ public class HalveImage {
     int s = 0;
     int t = 0;
     double temp = 0;
-    
+
     // handle case where there is only 1 column/row
     if( width == 1 || height == 1 ) {
       assert( !( width == 1 && height == 1 ) ); // can't be 1x1
@@ -594,10 +594,10 @@ public class HalveImage {
                                 ysize, group_size, myswap_bytes );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
-    
+
     // Piece of cake
     if( !myswap_bytes ) {
       for( i = 0; i < newheight; i++ ) {
@@ -643,7 +643,7 @@ public class HalveImage {
       }
     }
   }
-  
+
   public static void halve1Dimage_uint( int components, int width, int height,
                       ByteBuffer datain, IntBuffer dataout, int element_size, int ysize,
                       int group_size, boolean myswap_bytes ) {
@@ -652,14 +652,14 @@ public class HalveImage {
     int src = 0;
     int dest = 0;
     int jj;
-    
+
     assert( width == 1 || height == 1 ); // must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // widthxheight can't be 1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < halfHeight; kk++ ) {
@@ -689,7 +689,7 @@ public class HalveImage {
       halfWidth = 1;
       // one vertical column with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -716,7 +716,7 @@ public class HalveImage {
     }
     assert( dest == components * element_size * halfWidth * halfHeight );
   }
-  
+
   public static void halveImage_int( int components, int width, int height,
                         ByteBuffer datain, IntBuffer dataout, int element_size,
                         int ysize, int group_size, boolean myswap_bytes ) {
@@ -725,7 +725,7 @@ public class HalveImage {
     int s = 0;
     int t = 0;
     int temp = 0;
-    
+
     // handle case where there is only 1 column/row
     if( width == 1 || height == 1 ) {
       assert( !( width == 1 && height == 1 ) ); // can't be 1x1
@@ -733,10 +733,10 @@ public class HalveImage {
                             ysize, group_size, myswap_bytes );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
-    
+
     // Piece of cake
     if( !myswap_bytes ) {
       for( i = 0; i < newheight; i++ ) {
@@ -785,7 +785,7 @@ public class HalveImage {
       }
     }
   }
-  
+
   public static void halve1Dimage_int( int components, int width, int height,
               ByteBuffer datain, IntBuffer dataout, int element_size, int ysize,
               int group_size, boolean myswap_bytes ) {
@@ -794,14 +794,14 @@ public class HalveImage {
     int src = 0;
     int dest = 0;
     int jj;
-    
+
     assert( width == 1 || height == 1 ); // must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // can't be 1x1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -831,7 +831,7 @@ public class HalveImage {
       halfWidth = 1;
       // one vertical column with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -858,7 +858,7 @@ public class HalveImage {
     }
     assert( dest == ( components * element_size * halfWidth * halfHeight ) );
   }
-  
+
   public static void halveImage_float( int components, int width, int height,
                     ByteBuffer datain, FloatBuffer dataout, int element_size,
                     int ysize, int group_size, boolean myswap_bytes ) {
@@ -874,10 +874,10 @@ public class HalveImage {
                                               ysize, group_size, myswap_bytes );
       return;
     }
-    
+
     newwidth = width / 2;
     newheight = height / 2;
-    
+
     // Piece of cake
     if( !myswap_bytes ) {
       for( i = 0; i < newheight; i++ ) {
@@ -920,7 +920,7 @@ public class HalveImage {
       }
     }
   }
-  
+
   public static void halve1Dimage_float( int components, int width, int height,
               ByteBuffer datain, FloatBuffer dataout, int element_size, int ysize,
               int group_size, boolean myswap_bytes ) {
@@ -929,14 +929,14 @@ public class HalveImage {
     int src = 0;
     int dest = 0;
     int jj;
-    
+
     assert( width == 1 || height == 1 ); // must be 1D
     assert( width != height ); // can't be square
-    
+
     if( height == 1 ) { // 1 row
       assert( width != 1 ); // can't be 1x1
       halfHeight = 1;
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -966,7 +966,7 @@ public class HalveImage {
       halfWidth = 1;
       // one vertical column with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         int kk;
         for( kk = 0; kk < components; kk++ ) {
@@ -993,9 +993,9 @@ public class HalveImage {
     }
     assert( dest == ( components * element_size * halfWidth * halfHeight ) );
   }
-  
-  public static void halveImagePackedPixel( int components, Extract extract, int width, 
-          int height, ByteBuffer datain, ByteBuffer dataout, 
+
+  public static void halveImagePackedPixel( int components, Extract extract, int width,
+          int height, ByteBuffer datain, ByteBuffer dataout,
           int pixelSizeInBytes, int rowSizeInBytes, boolean isSwap ) {
     if( width == 1 || height == 1 ) {
       assert( !( width == 1 && height == 1 ) );
@@ -1004,19 +1004,19 @@ public class HalveImage {
       return;
     }
     int ii, jj;
-    
+
     int halfWidth = width / 2;
     int halfHeight = height / 2;
     int src = 0;
     int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
     int outIndex = 0;
-    
+
     for( ii = 0; ii < halfHeight; ii++ ) {
       for( jj = 0; jj < halfWidth; jj++ ) {
         float totals[] = new float[4];
         float extractTotals[][] = new float[BOX4][4];
         int cc;
-        
+
         datain.position( src );
         extract.extract( isSwap, datain, extractTotals[0] );
         datain.position( src + pixelSizeInBytes );
@@ -1045,7 +1045,7 @@ public class HalveImage {
     assert( src == rowSizeInBytes * height );
     assert( outIndex == halfWidth * halfHeight );
   }
-  
+
   public static void halve1DimagePackedPixel( int components, Extract extract, int width,
               int height, ByteBuffer datain, ByteBuffer dataout,
               int pixelSizeInBytes, int rowSizeInBytes, boolean isSwap ) {
@@ -1053,23 +1053,23 @@ public class HalveImage {
     int halfHeight = height / 2;
     int src = 0;
     int jj;
-    
+
     assert( width == 1 || height == 1 );
     assert( width != height );
-    
+
     if( height == 1 ) {
       int outIndex = 0;
-      
+
       assert( width != 1 );
       halfHeight = 1;
-      
+
       // one horizontal row with possible pad bytes
-      
+
       for( jj = 0; jj < halfWidth; jj++ ) {
         float[] totals = new float[4];
         float[][] extractTotals = new float[BOX2][4];
         int cc;
-        
+
         datain.position( src );
         extract.extract( isSwap, datain, extractTotals[0] );
         datain.position( src + pixelSizeInBytes );
@@ -1090,17 +1090,17 @@ public class HalveImage {
       }
       int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
       src += padBytes;
-      
+
       assert( src == rowSizeInBytes );
       assert( outIndex == halfWidth * halfHeight );
     } else if( width == 1 ) {
       int outIndex = 0;
-      
+
       assert( height != 1 );
       halfWidth = 1;
       // one vertical volumn with possible pad bytes per row
       // average two at a time
-      
+
       for( jj = 0; jj < halfHeight; jj++ ) {
         float[] totals = new float[4];
         float[][] extractTotals = new float[BOX2][4];
@@ -1128,7 +1128,7 @@ public class HalveImage {
       assert( outIndex == halfWidth * halfHeight );
     }
   }
-  
+
   public static void halveImagePackedPixelSlice( int components, Extract extract,
           int width, int height, int depth, ByteBuffer dataIn,
           ByteBuffer dataOut, int pixelSizeInBytes, int rowSizeInBytes,
@@ -1140,26 +1140,26 @@ public class HalveImage {
     int src = 0;
     int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
     int outIndex = 0;
-    
+
     assert( (width == 1 || height == 1) && depth >= 2 );
-    
+
     if( width == height ) {
       assert( width == 1 && height == 1 );
       assert( depth >= 2 );
-      
+
       for( ii = 0; ii < halfDepth; ii++ ) {
         float totals[] = new float[4];
         float extractTotals[][] = new float[BOX2][4];
         int cc;
-        
+
         dataIn.position( src );
         extract.extract( isSwap, dataIn, extractTotals[0] );
         dataIn.position( src + imageSizeInBytes );
         extract.extract( isSwap, dataIn, extractTotals[1] );
-        
+
         for( cc = 0; cc < components; cc++ ) {
           int kk;
-          
+
           // average only 2 pixels since a column
           totals[cc]= 0.0f;
           for( kk = 0; kk < BOX2; kk++ ) {
@@ -1167,7 +1167,7 @@ public class HalveImage {
           }
           totals[cc] /= BOX2;
         } // for cc
-        
+
         extract.shove( totals, outIndex, dataOut );
         outIndex++;
         // skip over to next group of 2
@@ -1175,13 +1175,13 @@ public class HalveImage {
       } // for ii
     } else if( height == 1 ) {
       assert( width != 1 );
-      
+
       for( ii = 0; ii < halfDepth; ii++ ) {
         for( jj = 0; jj < halfWidth; jj++ ) {
           float totals[] = new float[4];
           float extractTotals[][] = new float[BOX4][4];
           int cc;
-          
+
           dataIn.position( src );
           extract.extract( isSwap, dataIn, extractTotals[0] );
           dataIn.position( src + pixelSizeInBytes );
@@ -1190,10 +1190,10 @@ public class HalveImage {
           extract.extract( isSwap, dataIn, extractTotals[2] );
           dataIn.position( src + pixelSizeInBytes + imageSizeInBytes );
           extract.extract( isSwap, dataIn, extractTotals[3] );
-          
+
           for( cc = 0; cc < components; cc++ ) {
             int kk;
-            
+
             // grab 4 pixels to average
             totals[cc] = 0.0f;
             for( kk = 0; kk < BOX4; kk++ ) {
@@ -1209,13 +1209,13 @@ public class HalveImage {
       }
     } else if( width == 1 ) {
       assert( height != 1 );
-      
+
       for( ii = 0; ii < halfDepth; ii++ ) {
         for( jj = 0; jj < halfWidth; jj++ ) {
           float totals[] = new float[4];
           float extractTotals[][] = new float[BOX4][4];
           int cc;
-          
+
           dataIn.position( src );
           extract.extract( isSwap, dataIn, extractTotals[0] );
           dataIn.position( src + rowSizeInBytes );
@@ -1224,10 +1224,10 @@ public class HalveImage {
           extract.extract( isSwap, dataIn, extractTotals[2] );
           dataIn.position( src + rowSizeInBytes + imageSizeInBytes );
           extract.extract( isSwap, dataIn, extractTotals[3] );
-          
+
           for( cc = 0; cc < components; cc++ ) {
             int kk;
-            
+
             // grab 4 pixels to average
             totals[cc] = 0.0f;
             for( kk = 0; kk < BOX4; kk++ ) {
@@ -1243,7 +1243,7 @@ public class HalveImage {
       }
     }
   }
-  
+
   public static void halveImageSlice( int components, ExtractPrimitive extract, int width,
           int height, int depth, ByteBuffer dataIn, ByteBuffer dataOut,
           int elementSizeInBytes, int groupSizeInBytes, int rowSizeInBytes,
@@ -1255,25 +1255,25 @@ public class HalveImage {
     int src = 0;
     int padBytes = rowSizeInBytes - ( width * groupSizeInBytes );
     int outIndex = 0;
-    
+
     assert( (width == 1 || height == 1) && depth >= 2 );
-    
+
     if( width == height ) {
       assert( width == 1 && height == 1 );
       assert( depth >= 2 );
-      
+
       for( ii = 0; ii < halfDepth; ii++ ) {
         int cc;
         for( cc = 0; cc < components; cc++ ) {
           double[] totals = new double[4];
           double[][] extractTotals = new double[BOX2][4];
           int kk;
-          
+
           dataIn.position( src );
           extractTotals[0][cc] = extract.extract( isSwap, dataIn );
           dataIn.position( src + imageSizeInBytes );
           extractTotals[1][cc] = extract.extract( isSwap, dataIn );
-          
+
           // average 2 pixels since only a column
           totals[cc] = 0.0f;
           // totals[red] = extractTotals[0][red] + extractTotals[1][red];
@@ -1282,7 +1282,7 @@ public class HalveImage {
             totals[cc] += extractTotals[kk][cc];
           }
           totals[cc] /= (double)BOX2;
-          
+
           extract.shove( totals[cc], outIndex, dataOut );
           outIndex++;
           src += elementSizeInBytes;
@@ -1290,12 +1290,12 @@ public class HalveImage {
         // skip over next group of 2
         src += rowSizeInBytes;
       } // for ii
-      
+
       assert( src == rowSizeInBytes * height * depth );
       assert( outIndex == halfDepth * components );
     } else if( height == 1 ) {
       assert( width != 1 );
-      
+
       for( ii = 0; ii < halfDepth; ii++ ) {
         for( jj = 0; jj < halfWidth; jj++ ) {
           int cc;
@@ -1303,7 +1303,7 @@ public class HalveImage {
             int kk;
             double totals[] = new double[4];
             double extractTotals[][] = new double[BOX4][4];
-            
+
             dataIn.position( src );
             extractTotals[0][cc] = extract.extract( isSwap, dataIn );
             dataIn.position( src + groupSizeInBytes );
@@ -1312,7 +1312,7 @@ public class HalveImage {
             extractTotals[2][cc] = extract.extract( isSwap, dataIn );
             dataIn.position( src + imageSizeInBytes + groupSizeInBytes );
             extractTotals[3][cc] = extract.extract( isSwap, dataIn );
-            
+
             // grab 4 pixels to average
             totals[cc] = 0.0f;
             // totals[red] = extractTotals[0][red] + extractTotals[1][red] +
@@ -1322,7 +1322,7 @@ public class HalveImage {
               totals[cc] += extractTotals[kk][cc];
             }
             totals[cc] /= (double)BOX4;
-            
+
             extract.shove( totals[cc], outIndex, dataOut );
             outIndex++;
             src += elementSizeInBytes;
@@ -1337,7 +1337,7 @@ public class HalveImage {
       assert( outIndex == halfWidth * halfDepth * components );
     } else if( width == 1 ) {
       assert( height != 1 );
-      
+
       for( ii = 0; ii < halfDepth; ii++ ) {
         for( jj = 0; jj < halfHeight; jj++ ) {
           int cc;
@@ -1345,7 +1345,7 @@ public class HalveImage {
             int kk;
             double totals[] = new double[4];
             double extractTotals[][] = new double[BOX4][4];
-            
+
             dataIn.position( src );
             extractTotals[0][cc] = extract.extract( isSwap, dataIn );
             dataIn.position( src + rowSizeInBytes );
@@ -1354,8 +1354,8 @@ public class HalveImage {
             extractTotals[2][cc] = extract.extract( isSwap, dataIn );
             dataIn.position( src + imageSizeInBytes + groupSizeInBytes );
             extractTotals[3][cc] = extract.extract( isSwap, dataIn );
-            
-            
+
+
             // grab 4 pixels to average
             totals[cc] = 0.0f;
             // totals[red] = extractTotals[0][red] + extractTotals[1][red] +
@@ -1365,7 +1365,7 @@ public class HalveImage {
               totals[cc] += extractTotals[kk][cc];
             }
             totals[cc] /= (double)BOX4;
-            
+
             extract.shove( totals[cc], outIndex, dataOut );
             outIndex++;
             src += elementSizeInBytes;
@@ -1380,32 +1380,32 @@ public class HalveImage {
       assert( outIndex == halfWidth * halfDepth * components );
     }
   }
-  
+
   public static void halveImage3D( int components, ExtractPrimitive extract,
           int width, int height, int depth, ByteBuffer dataIn, ByteBuffer dataOut,
           int elementSizeInBytes, int groupSizeInBytes, int rowSizeInBytes,
           int imageSizeInBytes, boolean isSwap ) {
     assert( depth > 1 );
-    
+
     // horizontal/vertical/onecolumn slice viewed from top
     if( width == 1 || height == 1 ) {
       assert( 1 <= depth );
-      
+
       halveImageSlice( components, extract, width, height, depth, dataIn, dataOut,
               elementSizeInBytes, groupSizeInBytes, rowSizeInBytes, imageSizeInBytes,
               isSwap );
       return;
     }
-    
+
     int ii, jj, dd;
-    
+
     int halfWidth = width / 2;
     int halfHeight = height / 2;
     int halfDepth = depth / 2;
     int src = 0;
     int padBytes = rowSizeInBytes - ( width * groupSizeInBytes );
     int outIndex = 0;
-    
+
     for( dd = 0; dd < halfDepth; dd++ ) {
       for( ii = 0; ii < halfHeight; ii++ ) {
         for( jj = 0; jj < halfWidth; jj++ ) {
@@ -1414,7 +1414,7 @@ public class HalveImage {
             int kk;
             double totals[] = new double[4];
             double extractTotals[][] = new double[BOX8][4];
-            
+
             dataIn.position( src );
             extractTotals[0][cc] = extract.extract( isSwap, dataIn );
             dataIn.position( src + groupSizeInBytes );
@@ -1431,17 +1431,17 @@ public class HalveImage {
             extractTotals[6][cc] = extract.extract( isSwap, dataIn );
             dataIn.position( src + rowSizeInBytes + imageSizeInBytes + groupSizeInBytes );
             extractTotals[7][cc] = extract.extract( isSwap, dataIn );
-            
+
             totals[cc] = 0.0f;
-            
+
             for( kk = 0; kk < BOX8; kk++ ) {
               totals[cc] += extractTotals[kk][cc];
             }
             totals[cc] /= (double)BOX8;
-            
+
             extract.shove( totals[cc], outIndex, dataOut );
             outIndex++;
-            
+
             src += elementSizeInBytes;
           } // for cc
           // skip over to next square of 4
@@ -1456,40 +1456,40 @@ public class HalveImage {
     assert( src == rowSizeInBytes * height * depth );
     assert( outIndex == halfWidth * halfHeight * halfDepth * components );
   }
-  
+
   public static void halveImagePackedPixel3D( int components, Extract extract,
-          int width, int height, int depth, ByteBuffer dataIn, 
+          int width, int height, int depth, ByteBuffer dataIn,
           ByteBuffer dataOut, int pixelSizeInBytes, int rowSizeInBytes,
           int imageSizeInBytes, boolean isSwap ) {
     if( depth == 1 ) {
       assert( 1 <= width && 1 <= height );
-      
+
       halveImagePackedPixel( components, extract, width, height, dataIn, dataOut,
               pixelSizeInBytes, rowSizeInBytes, isSwap );
       return;
     } else if( width == 1 || height == 1 ) { // a horizontal or vertical slice viewed from top
       assert( 1 <= depth );
-      
+
       halveImagePackedPixelSlice( components, extract, width, height, depth, dataIn,
               dataOut, pixelSizeInBytes, rowSizeInBytes, imageSizeInBytes, isSwap );
       return;
     }
     int ii, jj, dd;
-    
+
     int halfWidth = width / 2;
     int halfHeight = height / 2;
     int halfDepth = depth / 2;
     int src = 0;
     int padBytes = rowSizeInBytes - ( width * pixelSizeInBytes );
     int outIndex = 0;
-    
+
     for( dd = 0; dd < halfDepth; dd++ ) {
       for( ii = 0; ii < halfHeight; ii++ ) {
         for( jj = 0; jj < halfWidth; jj++ ) {
           float totals[] = new float[4]; // 4 is max components
           float extractTotals[][] = new float[BOX8][4];
           int cc;
-          
+
           dataIn.position( src );
           extract.extract( isSwap, dataIn, extractTotals[0] );
           dataIn.position( src + pixelSizeInBytes );
@@ -1506,7 +1506,7 @@ public class HalveImage {
           extract.extract( isSwap, dataIn, extractTotals[6] );
           dataIn.position( src + rowSizeInBytes + pixelSizeInBytes + imageSizeInBytes );
           extract.extract( isSwap, dataIn, extractTotals[7] );
-          
+
           for( cc = 0; cc < components; cc++ ) {
             int kk;
             // grab 8 pixels to average
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Image.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Image.java
index b610ce86b..18f814dde 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Image.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Image.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -53,18 +53,18 @@ import java.nio.*;
  * @author  Administrator
  */
 public class Image {
-  
+
   /** Creates a new instance of Image */
   public Image() {
   }
-  
+
   public static short getShortFromByteArray( byte[] array, int index ) {
     short s;
     s = (short)(array[index] << 8 );
     s |= (short)(0x00FF & array[index+1]);
     return( s );
   }
-  
+
   public static int getIntFromByteArray( byte[] array, int index ) {
     int i;
     i = ( array[index] << 24 ) & 0xFF000000;
@@ -73,12 +73,12 @@ public class Image {
     i |= ( array[index+3] ) & 0x000000FF;
     return( i );
   }
-  
+
   public static float getFloatFromByteArray( byte[] array, int index ) {
     int i = getIntFromByteArray( array, index );
     return( Float.intBitsToFloat(i) );
   }
-  
+
   /*
    *  Extract array from user's data applying all pixel store modes.
    *  The internal format used is an array of unsigned shorts.
@@ -98,7 +98,7 @@ public class Image {
     int iter2;
     int i, j, k;
     boolean myswap_bytes;
-    
+
     // Create a Extract interface object
     Extract extract = null;
     switch( type ) {
@@ -139,7 +139,7 @@ public class Image {
         extract = new Extract2101010rev();
         break;
     }
-    
+
     myswap_bytes = psm.getUnpackSwapBytes();
     components = Mipmap.elements_per_group( format, type );
     if( psm.getUnpackRowLength() > 0 ) {
@@ -147,12 +147,12 @@ public class Image {
     } else {
       groups_per_line = width;
     }
-    
+
     // All formats except GL_BITMAP fall out trivially
     if( type == GL2.GL_BITMAP ) {
       int bit_offset;
       int current_bit;
-      
+
       rowsize = ( groups_per_line * components + 7 ) / 8;
       padding = ( rowsize % psm.getUnpackAlignment() );
       if( padding != 0 ) {
@@ -200,7 +200,7 @@ public class Image {
       if( element_size == 1 ) {
         myswap_bytes = false;
       }
-      
+
       rowsize = groups_per_line * group_size;
       padding = ( rowsize % psm.getUnpackAlignment() );
       if( padding != 0 ) {
@@ -208,7 +208,7 @@ public class Image {
       }
       start = psm.getUnpackSkipRows() * rowsize + psm.getUnpackSkipPixels() * group_size;
       elements_per_line = width * components;
-      
+
       iter2 = 0;
       for( i = 0; i < height; i++ ) {
         iter = start;
@@ -364,7 +364,7 @@ public class Image {
         // want iter pointing at start, not within, row for assertion purposes
         iter = start;
       } // for i
-      
+
       // iterators should be one byte past end
       if( !Mipmap.isTypePackedPixel( type ) ) {
         assert( iter2 == ( width * height * components ) );
@@ -374,16 +374,16 @@ public class Image {
       assert( iter == ( rowsize * height + psm.getUnpackSkipRows() * rowsize + psm.getUnpackSkipPixels() * group_size ) );
     }
   }
-  
+
   /*
    *  Insert array into user's data applying all pixel store modes.
    *  Theinternal format is an array of unsigned shorts.
    *  empty_image() because it is the opposet of fill_image().
    */
-  public static void empty_image( PixelStorageModes psm, int width, int height, 
-                                  int format, int type, boolean index_format, 
+  public static void empty_image( PixelStorageModes psm, int width, int height,
+                                  int format, int type, boolean index_format,
                                   ShortBuffer oldimage, ByteBuffer userdata ) {
-    
+
     int components;
     int element_size;
     int rowsize;
@@ -396,7 +396,7 @@ public class Image {
     int iter2;
     int i, j, k;
     boolean myswap_bytes;
-    
+
     // Create a Extract interface object
     Extract extract = null;
     switch( type ) {
@@ -437,7 +437,7 @@ public class Image {
         extract = new Extract2101010rev();
         break;
     }
-    
+
     myswap_bytes = psm.getPackSwapBytes();
     components = Mipmap.elements_per_group( format, type );
     if( psm.getPackRowLength() > 0 ) {
@@ -445,12 +445,12 @@ public class Image {
     } else {
       groups_per_line = width;
     }
-    
+
     // all formats except GL_BITMAP fall out trivially
     if( type == GL2.GL_BITMAP ) {
       int bit_offset;
       int current_bit;
-      
+
       rowsize = ( groups_per_line * components + 7 ) / 8;
       padding = ( rowsize % psm.getPackAlignment() );
       if( padding != 0 ) {
@@ -472,7 +472,7 @@ public class Image {
               current_bit = 0;
             }
           }
-          
+
           if( current_bit != 0 ) {
             if( psm.getPackLsbFirst() ) {
               userdata.put( iter, (byte)( ( userdata.get( iter ) | ( 1 << bit_offset ) ) ) );
@@ -488,7 +488,7 @@ public class Image {
               userdata.put( iter, (byte)( ( userdata.get( iter ) & ~( 7 - bit_offset ) ) ) );
             }
           }
-          
+
           bit_offset++;
           if( bit_offset == 8 ) {
             bit_offset = 0;
@@ -500,13 +500,13 @@ public class Image {
       }
     } else {
       float shoveComponents[] = new float[4];
-      
+
       element_size = Mipmap.bytes_per_element( type );
       group_size = element_size * components;
       if( element_size == 1 ) {
         myswap_bytes = false;
       }
-      
+
       rowsize = groups_per_line * group_size;
       padding = ( rowsize % psm.getPackAlignment() );
       if( padding != 0 ) {
@@ -514,13 +514,13 @@ public class Image {
       }
       start = psm.getPackSkipRows() * rowsize + psm.getPackSkipPixels() * group_size;
       elements_per_line = width * components;
-      
+
       iter2 = 0;
       for( i = 0; i < height; i++ ) {
         iter = start;
         for( j = 0; j < elements_per_line; j++ ) {
           Type_Widget widget = new Type_Widget();
-          
+
           switch( type ) {
             case( GL2.GL_UNSIGNED_BYTE_3_3_2 ):
               for( k = 0; k < 3; k++ ) {
@@ -799,7 +799,7 @@ public class Image {
       assert( iter == rowsize * height + psm.getPackSkipRows() * rowsize + psm.getPackSkipPixels() * group_size );
     }
   }
-  
+
   public static void fillImage3D( PixelStorageModes psm, int width, int height,
           int depth, int format, int type, boolean indexFormat, ByteBuffer userImage,
           ShortBuffer newImage ) {
@@ -819,7 +819,7 @@ public class Image {
     int ww, hh, dd, k;
     Type_Widget widget = new Type_Widget();
     float extractComponents[] = new float[4];
-    
+
     // Create a Extract interface object
     Extract extract = null;
     switch( type ) {
@@ -860,7 +860,7 @@ public class Image {
         extract = new Extract2101010rev();
         break;
     }
-    
+
     myswapBytes = psm.getUnpackSwapBytes();
     components = Mipmap.elements_per_group( format, type );
     if( psm.getUnpackRowLength() > 0 ) {
@@ -873,7 +873,7 @@ public class Image {
     if( elementSize == 1 ) {
       myswapBytes = false;
     }
-    
+
     // 3dstuff begin
     if( psm.getUnpackImageHeight() > 0 ) {
       rowsPerImage = psm.getUnpackImageHeight();
@@ -881,27 +881,27 @@ public class Image {
       rowsPerImage = height;
     }
     // 3dstuff end
-    
+
     rowSize = groupsPerLine * groupSize;
     padding = rowSize % psm.getUnpackAlignment();
     if( padding != 0 ) {
       rowSize += psm.getUnpackAlignment() - padding;
     }
-    
+
     imageSize = rowsPerImage * rowSize; // 3dstuff
-    
-    start = psm.getUnpackSkipRows() * rowSize + 
-            psm.getUnpackSkipPixels() * groupSize + 
+
+    start = psm.getUnpackSkipRows() * rowSize +
+            psm.getUnpackSkipPixels() * groupSize +
             psm.getUnpackSkipImages() * imageSize;
     elementsPerLine = width * components;
-    
+
     iter2 = 0;
     for( dd = 0; dd < depth; dd++ ) {
       rowStart = start;
       for( hh = 0; hh < height; hh++ ) {
         iter = rowStart;
         for( ww = 0; ww < elementsPerLine; ww++ ) {
-          
+
           switch( type ) {
             case( GL2.GL_UNSIGNED_BYTE ):
               if( indexFormat ) {
@@ -1063,18 +1063,18 @@ public class Image {
       } // for hh
       start += imageSize;
     }// for dd
-    
+
     // iterators should be one byte past end
     if( !Mipmap.isTypePackedPixel( type ) ) {
       assert( iter2 == width * height * depth * components );
     } else {
       assert( iter2 == width * height * depth * Mipmap.elements_per_group( format, 0 ) );
     }
-    assert( iter == rowSize * height * depth + psm.getUnpackSkipRows() * rowSize + 
+    assert( iter == rowSize * height * depth + psm.getUnpackSkipRows() * rowSize +
             psm.getUnpackSkipPixels() * groupSize +
             psm.getUnpackSkipImages() * imageSize );
   }
-  
+
   public static void emptyImage3D( PixelStorageModes psm, int width, int height, int depth,
           int format, int type, boolean indexFormat, ShortBuffer oldImage, ByteBuffer userImage ) {
     boolean myswapBytes;
@@ -1092,7 +1092,7 @@ public class Image {
     int imageSize;
     Type_Widget widget = new Type_Widget();
     float[] shoveComponents = new float[4];
-    
+
     // Create a Extract interface object
     Extract extract = null;
     switch( type ) {
@@ -1133,9 +1133,9 @@ public class Image {
         extract = new Extract2101010rev();
         break;
     }
-    
+
     iter = 0;
-    
+
     myswapBytes = psm.getPackSwapBytes();
     components = Mipmap.elements_per_group( format, type );
     if( psm.getPackRowLength() > 0 ) {
@@ -1143,44 +1143,44 @@ public class Image {
     } else {
       groupsPerLine = width;
     }
-    
+
     elementSize = Mipmap.bytes_per_element( type );
     groupSize = elementSize * components;
     if( elementSize == 1 ) {
       myswapBytes = false;
     }
-    
+
     // 3dstuff begin
     if( psm.getPackImageHeight() > 0 ) {
       rowsPerImage = psm.getPackImageHeight();
     } else {
       rowsPerImage = height;
     }
-    
+
     // 3dstuff end
-    
+
     rowSize = groupsPerLine * groupSize;
     padding = rowSize % psm.getPackAlignment();
     if( padding != 0 ) {
       rowSize += psm.getPackAlignment() - padding;
     }
-    
+
     imageSize = rowsPerImage * rowSize;
-    
+
     start = psm.getPackSkipRows() * rowSize +
             psm.getPackSkipPixels() * groupSize +
             psm.getPackSkipImages() * imageSize;
     elementsPerLine = width * components;
-    
+
     iter2 = 0;
     for( dd = 0; dd < depth; dd++ ) {
       rowStart = start;
-      
+
       for( ii = 0; ii < height; ii++ ) {
         iter = rowStart;
-        
+
         for( jj = 0; jj < elementsPerLine; jj++ ) {
-          
+
           switch( type ) {
             case( GL2.GL_UNSIGNED_BYTE ):
               if( indexFormat ) {
@@ -1392,20 +1392,20 @@ public class Image {
             default:
               assert( false );
           }
-          
+
           iter += elementSize;
         } // for jj
         rowStart += rowSize;
       } // for ii
       start += imageSize;
     } // for dd
-    
+
     if( !Mipmap.isTypePackedPixel( type ) ) {
       assert( iter2 == width * height * depth * components );
     } else {
       assert( iter2 == width * height * depth * Mipmap.elements_per_group( format, 0 ) );
     }
-    assert( iter == rowSize * height * depth + 
+    assert( iter == rowSize * height * depth +
                     psm.getUnpackSkipRows() * rowSize +
                     psm.getUnpackSkipPixels() * groupSize +
                     psm.getUnpackSkipImages() * imageSize );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Mipmap.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Mipmap.java
index b74d0a6b8..938873ec5 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Mipmap.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Mipmap.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -57,11 +57,11 @@ import com.jogamp.common.nio.Buffers;
  * @author  Administrator
  */
 public class Mipmap {
-  
+
   /** Creates a new instance of Mipmap */
   public Mipmap() {
   }
-  
+
   public static int computeLog( int value ) {
     int i = 0;
     // Error
@@ -79,7 +79,7 @@ public class Mipmap {
       i++;
     }
   }
-  
+
   /* Compute the nearest power of 2 number.  This algorithm is a little strange
    * but it works quite well.
    */
@@ -99,7 +99,7 @@ public class Mipmap {
       i *= 2;
     }
   }
-  
+
   public static short GLU_SWAP_2_BYTES( short s ) {
     byte b = 0;
     b = (byte)( s >>> 8 );
@@ -107,7 +107,7 @@ public class Mipmap {
     s = (short)( s | (0x00FF & b) );
     return( s );
   }
-  
+
   public static int GLU_SWAP_4_BYTES( int i ) {
     int t = i << 24;
     t |= 0x00FF0000 & ( i << 8 );
@@ -115,13 +115,13 @@ public class Mipmap {
     t |= 0x000000FF & ( i >>> 24 );
     return( t );
   }
-  
+
   public static float GLU_SWAP_4_BYTES( float f ) {
     int i = Float.floatToRawIntBits( f );
     float temp = Float.intBitsToFloat( i );
     return( temp );
   }
-  
+
   public static int checkMipmapArgs( int internalFormat, int format, int type ) {
     if( !legalFormat( format ) || !legalType( type ) ) {
       return( GLU.GLU_INVALID_ENUM );
@@ -134,7 +134,7 @@ public class Mipmap {
     }
     return( 0 );
   }
-  
+
   public static boolean legalFormat( int format ) {
     switch( format ) {
       case( GL2.GL_COLOR_INDEX ):
@@ -155,7 +155,7 @@ public class Mipmap {
         return( false );
     }
   }
-  
+
   public static boolean legalType( int type ) {
     switch( type ) {
       case( GL2.GL_BITMAP ):
@@ -183,10 +183,10 @@ public class Mipmap {
         return( false );
     }
   }
-  
+
   public static boolean isTypePackedPixel( int type ) {
     assert( legalType( type ) );
-    
+
     if( type == GL2GL3.GL_UNSIGNED_BYTE_3_3_2 ||
         type == GL2GL3.GL_UNSIGNED_BYTE_2_3_3_REV ||
         type == GL2GL3.GL_UNSIGNED_SHORT_5_6_5 ||
@@ -203,20 +203,20 @@ public class Mipmap {
     }
     return( false );
   }
-  
+
   public static boolean isLegalFormatForPackedPixelType( int format, int type ) {
     // if not a packed pixel type then return true
     if( isTypePackedPixel( type ) ) {
       return( true );
     }
-    
+
     // 3_3_2/2_3_3_REV & 5_6_5/5_6_5_REV are only compatible with RGB
     if( (type == GL2GL3.GL_UNSIGNED_BYTE_3_3_2 || type == GL2GL3.GL_UNSIGNED_BYTE_2_3_3_REV ||
         type == GL2GL3.GL_UNSIGNED_SHORT_5_6_5 || type == GL2GL3.GL_UNSIGNED_SHORT_5_6_5_REV )
         & format != GL2GL3.GL_RGB ) {
           return( false );
     }
-    
+
     // 4_4_4_4/4_4_4_4_REV & 5_5_5_1/1_5_5_5_REV & 8_8_8_8/8_8_8_8_REV &
     // 10_10_10_2/2_10_10_10_REV are only campatible with RGBA, BGRA & ARGB_EXT
     if( ( type == GL2GL3.GL_UNSIGNED_SHORT_4_4_4_4 ||
@@ -232,7 +232,7 @@ public class Mipmap {
     }
     return( true );
   }
-  
+
   public static boolean isLegalLevels( int userLevel, int baseLevel, int maxLevel,
                                             int totalLevels ) {
     if( (baseLevel < 0) || (baseLevel < userLevel) || (maxLevel < baseLevel) ||
@@ -241,7 +241,7 @@ public class Mipmap {
     }
     return( true );
   }
-  
+
   /* Given user requested textures size, determine if it fits. If it doesn't then
    * halve both sides and make the determination again until it does fit ( for
    * IR only ).
@@ -257,7 +257,7 @@ public class Mipmap {
       int heightPowerOf2 = nearestPower( height );
       int[] proxyWidth = new int[1];
       boolean noProxyTextures = false;
-      
+
       // Some drivers (in particular, ATI's) seem to set a GL error
       // when proxy textures are used even though this is in violation
       // of the spec. Guard against this and interactions with the
@@ -268,20 +268,20 @@ public class Mipmap {
           int widthAtLevelOne = ( ( width > 1 ) ? (widthPowerOf2 >> 1) : widthPowerOf2 );
           int heightAtLevelOne = ( ( height > 1 ) ? (heightPowerOf2 >> 1) : heightPowerOf2 );
           int proxyTarget;
-        
+
           assert( widthAtLevelOne > 0 );
           assert( heightAtLevelOne > 0 );
-        
+
           // does width x height at level 1 & all their mipmaps fit?
           if( target == GL2GL3.GL_TEXTURE_2D || target == GL2GL3.GL_PROXY_TEXTURE_2D ) {
             proxyTarget = GL2GL3.GL_PROXY_TEXTURE_2D;
             gl.glTexImage2D( proxyTarget, 1, internalFormat, widthAtLevelOne,
                              heightAtLevelOne, 0, format, type, null );
-          } else if( (target == GL2GL3.GL_TEXTURE_CUBE_MAP_POSITIVE_X) || 
-                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_NEGATIVE_X) || 
-                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_POSITIVE_Y) || 
-                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_NEGATIVE_Y) || 
-                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_POSITIVE_Z) || 
+          } else if( (target == GL2GL3.GL_TEXTURE_CUBE_MAP_POSITIVE_X) ||
+                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_NEGATIVE_X) ||
+                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_POSITIVE_Y) ||
+                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_NEGATIVE_Y) ||
+                     (target == GL2GL3.GL_TEXTURE_CUBE_MAP_POSITIVE_Z) ||
                      (target == GL2GL3.GL_TEXTURE_CUBE_MAP_NEGATIVE_Z) ) {
             proxyTarget = GL2GL3.GL_PROXY_TEXTURE_CUBE_MAP;
             gl.glTexImage2D( proxyTarget, 1, internalFormat, widthAtLevelOne,
@@ -289,7 +289,7 @@ public class Mipmap {
           } else {
             assert( target == GL2GL3.GL_TEXTURE_1D || target == GL2GL3.GL_PROXY_TEXTURE_1D );
             proxyTarget = GL2GL3.GL_PROXY_TEXTURE_1D;
-            gl.getGL2GL3().glTexImage1D( proxyTarget, 1, internalFormat, widthAtLevelOne, 
+            gl.getGL2GL3().glTexImage1D( proxyTarget, 1, internalFormat, widthAtLevelOne,
                              0, format, type, null );
           }
           if(gl.isGL2GL3()) {
@@ -336,15 +336,15 @@ public class Mipmap {
       newHeight[0] = maxsize[0];
     }
   }
-  
-  public static void closestFit3D( GL gl, int target, int width, int height, int depth, 
+
+  public static void closestFit3D( GL gl, int target, int width, int height, int depth,
           int internalFormat, int format, int type, int[] newWidth, int[] newHeight,
           int[] newDepth ) {
     int widthPowerOf2 = nearestPower( width );
     int heightPowerOf2 = nearestPower( height );
     int depthPowerOf2 = nearestPower( depth );
     int[] proxyWidth = new int[1];
-    
+
     do {
       // compute level 1 width & height & depth, clamping each at 1
       int widthAtLevelOne = (widthPowerOf2 > 1) ? widthPowerOf2 >> 1 : widthPowerOf2;
@@ -354,7 +354,7 @@ public class Mipmap {
       assert( widthAtLevelOne > 0 );
       assert( heightAtLevelOne > 0 );
       assert( depthAtLevelOne > 0 );
-      
+
       // does width x height x depth at level 1 & all their mipmaps fit?
       if( target == GL2GL3.GL_TEXTURE_3D || target == GL2GL3.GL_PROXY_TEXTURE_3D ) {
         proxyTarget = GL2GL3.GL_PROXY_TEXTURE_3D;
@@ -378,16 +378,16 @@ public class Mipmap {
       }
     } while( proxyWidth[0] == 0 );
     // loop must terminate
-    
+
     // return the width & height at level 0 that fits
     newWidth[0] = widthPowerOf2;
     newHeight[0] = heightPowerOf2;
     newDepth[0] = depthPowerOf2;
   }
-  
+
   public static int elements_per_group( int format, int type ) {
     // Return the number of elements per grtoup of a specified gromat
-    
+
     // If the type is packedpixels then answer is 1
     if( type == GL2GL3.GL_UNSIGNED_BYTE_3_3_2 ||
         type == GL2GL3.GL_UNSIGNED_BYTE_2_3_3_REV ||
@@ -403,7 +403,7 @@ public class Mipmap {
         type == GL2GL3.GL_UNSIGNED_INT_2_10_10_10_REV ) {
           return( 1 );
     }
-    
+
     // Types are not packed pixels so get elements per group
     switch( format ) {
       case( GL2GL3.GL_RGB ):
@@ -418,10 +418,10 @@ public class Mipmap {
         return( 1 );
     }
   }
-  
+
   public static int bytes_per_element( int type ) {
     // return the number of bytes per element, based on the element type
-    
+
     switch( type ) {
       case( GL2.GL_BITMAP ):
       case( GL2GL3.GL_BYTE ):
@@ -450,17 +450,17 @@ public class Mipmap {
         return( 4 );
     }
   }
-  
+
   public static boolean is_index( int format ) {
     return( format == GL2.GL_COLOR_INDEX || format == GL2GL3.GL_STENCIL_INDEX );
   }
-  
+
   /* Compute memory required for internal packed array of data of given type and format. */
-  
+
   public static int image_size( int width, int height, int format, int type ) {
     int bytes_per_row;
     int components;
-    
+
     assert( width > 0 );
     assert( height > 0 );
     components = elements_per_group( format, type );
@@ -471,17 +471,17 @@ public class Mipmap {
     }
     return( bytes_per_row * height * components );
   }
-  
+
   public static int imageSize3D( int width, int height, int depth, int format, int type ) {
     int components = elements_per_group( format, type );
     int bytes_per_row = bytes_per_element( type ) * width;
-    
+
     assert( width > 0 && height > 0 && depth > 0 );
     assert( type != GL2.GL_BITMAP );
-    
+
     return( bytes_per_row * height * depth * components );
   }
-  
+
   public static void retrieveStoreModes( GL gl, PixelStorageModes psm ) {
     int[] a = new int[1];
     gl.glGetIntegerv( GL2GL3.GL_UNPACK_ALIGNMENT, a, 0);
@@ -496,7 +496,7 @@ public class Mipmap {
     psm.setUnpackLsbFirst( ( a[0] == 1 ) );
     gl.glGetIntegerv( GL2GL3.GL_UNPACK_SWAP_BYTES, a, 0);
     psm.setUnpackSwapBytes( ( a[0] == 1 ) );
-    
+
     gl.glGetIntegerv( GL2GL3.GL_PACK_ALIGNMENT, a, 0);
     psm.setPackAlignment( a[0] );
     gl.glGetIntegerv( GL2GL3.GL_PACK_ROW_LENGTH, a, 0);
@@ -510,7 +510,7 @@ public class Mipmap {
     gl.glGetIntegerv( GL2GL3.GL_PACK_SWAP_BYTES, a, 0);
     psm.setPackSwapBytes( ( a[0] == 1 ) );
   }
-  
+
   public static void retrieveStoreModes3D( GL gl, PixelStorageModes psm ) {
     int[] a = new int[1];
     gl.glGetIntegerv( GL2GL3.GL_UNPACK_ALIGNMENT, a, 0);
@@ -529,7 +529,7 @@ public class Mipmap {
     psm.setUnpackSkipImages( a[0] );
     gl.glGetIntegerv( GL2GL3.GL_UNPACK_IMAGE_HEIGHT, a, 0);
     psm.setUnpackImageHeight( a[0] );
-    
+
     gl.glGetIntegerv( GL2GL3.GL_PACK_ALIGNMENT, a, 0);
     psm.setPackAlignment( a[0] );
     gl.glGetIntegerv( GL2GL3.GL_PACK_ROW_LENGTH, a, 0);
@@ -547,9 +547,9 @@ public class Mipmap {
     gl.glGetIntegerv( GL2GL3.GL_PACK_IMAGE_HEIGHT, a, 0 );
     psm.setPackImageHeight( a[0] );
   }
-  
-  public static int gluScaleImage( GL gl, int format, int widthin, int heightin, 
-          int typein, ByteBuffer datain, int widthout, int heightout, 
+
+  public static int gluScaleImage( GL gl, int format, int widthin, int heightin,
+          int typein, ByteBuffer datain, int widthout, int heightout,
           int typeout, ByteBuffer dataout ) {
     int datainPos = datain.position();
     int dataoutPos = dataout.position();
@@ -559,7 +559,7 @@ public class Mipmap {
       ByteBuffer beforeimage;
       ByteBuffer afterimage;
       PixelStorageModes psm = new PixelStorageModes();
-    
+
       if( (widthin == 0)  || (heightin == 0) || (widthout == 0) || (heightout == 0) ) {
         return( 0 );
       }
@@ -580,20 +580,20 @@ public class Mipmap {
       if( beforeimage == null || afterimage == null ) {
         return( GLU.GLU_OUT_OF_MEMORY );
       }
-    
+
       retrieveStoreModes( gl, psm );
       Image.fill_image( psm, widthin, heightin, format, typein, is_index( format ), datain, beforeimage.asShortBuffer() );
       components = elements_per_group( format, 0 );
       ScaleInternal.scale_internal( components, widthin, heightin, beforeimage.asShortBuffer(), widthout, heightout, afterimage.asShortBuffer() );
       Image.empty_image( psm, widthout, heightout, format, typeout, is_index( format ), afterimage.asShortBuffer(), dataout );
-    
+
       return( 0 );
     } finally {
       datain.position(datainPos);
       dataout.position(dataoutPos);
     }
   }
-  
+
   public static int gluBuild1DMipmapLevels( GL gl, int target, int internalFormat,
                           int width, int format, int type, int userLevel, int baseLevel,
                           int maxLevel, ByteBuffer data ) {
@@ -601,30 +601,30 @@ public class Mipmap {
     try {
 
       int levels;
-    
+
       int rc = checkMipmapArgs( internalFormat, format, type );
       if( rc != 0 ) {
         return( rc );
       }
-    
+
       if( width < 1 ) {
         return( GLU.GLU_INVALID_VALUE );
       }
-    
+
       levels = computeLog( width );
-    
+
       levels += userLevel;
       if( !isLegalLevels( userLevel, baseLevel, maxLevel, levels ) ) {
         return( GLU.GLU_INVALID_VALUE );
       }
-    
+
       return( BuildMipmap.gluBuild1DMipmapLevelsCore( gl, target, internalFormat, width,
               width, format, type, userLevel, baseLevel, maxLevel, data ) );
     } finally {
       data.position(dataPos);
     }
   }
-  
+
   public static int gluBuild1DMipmaps( GL gl, int target, int internalFormat, int width,
               int format, int type, ByteBuffer data ) {
     int dataPos = data.position();
@@ -633,54 +633,54 @@ public class Mipmap {
       int[] widthPowerOf2 = new int[1];
       int levels;
       int[] dummy = new int[1];
-    
+
       int rc = checkMipmapArgs( internalFormat, format, type );
       if( rc != 0 ) {
         return( rc );
       }
-    
+
       if( width < 1 ) {
         return( GLU.GLU_INVALID_VALUE );
       }
-    
+
       closestFit( gl, target, width, 1, internalFormat, format, type, widthPowerOf2, dummy );
       levels = computeLog( widthPowerOf2[0] );
-    
-      return( BuildMipmap.gluBuild1DMipmapLevelsCore( gl, target, internalFormat, 
+
+      return( BuildMipmap.gluBuild1DMipmapLevelsCore( gl, target, internalFormat,
                     width, widthPowerOf2[0], format, type, 0, 0, levels, data ) );
     } finally {
       data.position(dataPos);
     }
   }
 
- 
+
   public static int gluBuild2DMipmapLevels( GL gl, int target, int internalFormat,
           int width, int height, int format, int type, int userLevel,
           int baseLevel, int maxLevel, Object data ) {
     int dataPos = 0;
 
     int level, levels;
-    
+
     int rc = checkMipmapArgs( internalFormat, format, type );
     if( rc != 0 ) {
       return( rc );
     }
-    
+
     if( width < 1 || height < 1 ) {
       return( GLU.GLU_INVALID_VALUE );
     }
-    
+
     levels = computeLog( width );
     level = computeLog( height );
     if( level > levels ) {
       levels = level;
     }
-    
+
     levels += userLevel;
     if( !isLegalLevels( userLevel, baseLevel, maxLevel, levels ) ) {
       return( GLU.GLU_INVALID_VALUE );
     }
-    
+
     //PointerWrapper pointer = PointerWrapperFactory.getPointerWrapper( data );
     ByteBuffer buffer = null;
     if( data instanceof ByteBuffer ) {
@@ -706,7 +706,7 @@ public class Mipmap {
         FloatBuffer fb = buffer.asFloatBuffer();
         fb.put( array );
     }
-    
+
     try {
       return( BuildMipmap.gluBuild2DMipmapLevelsCore( gl, target, internalFormat,
               width, height, width, height, format, type, userLevel, baseLevel,
@@ -716,7 +716,7 @@ public class Mipmap {
     }
   }
 
- 
+
   public static int gluBuild2DMipmaps( GL gl, int target, int internalFormat,
           int width, int height, int format, int type, Object data ) {
     int dataPos = 0;
@@ -724,25 +724,25 @@ public class Mipmap {
     int[] widthPowerOf2 = new int[1];
     int[] heightPowerOf2 = new int[1];
     int level, levels;
-    
+
     int rc = checkMipmapArgs( internalFormat, format, type );
     if( rc != 0 ) {
       return( rc );
     }
-    
+
     if( width < 1 || height < 1 ) {
       return( GLU.GLU_INVALID_VALUE );
     }
-    
-    closestFit( gl, target, width, height, internalFormat, format, type, 
+
+    closestFit( gl, target, width, height, internalFormat, format, type,
             widthPowerOf2, heightPowerOf2 );
-    
+
     levels = computeLog( widthPowerOf2[0] );
     level = computeLog( heightPowerOf2[0] );
     if( level > levels ) {
       levels = level;
     }
-    
+
     //PointerWrapper pointer = PointerWrapperFactory.getPointerWrapper( data );
     ByteBuffer buffer = null;
     if( data instanceof ByteBuffer ) {
@@ -768,17 +768,17 @@ public class Mipmap {
         FloatBuffer fb = buffer.asFloatBuffer();
         fb.put( array );
     }
-    
+
     try {
-      return( BuildMipmap.gluBuild2DMipmapLevelsCore( gl, target, internalFormat, 
-              width, height, widthPowerOf2[0], heightPowerOf2[0], format, type, 0, 
+      return( BuildMipmap.gluBuild2DMipmapLevelsCore( gl, target, internalFormat,
+              width, height, widthPowerOf2[0], heightPowerOf2[0], format, type, 0,
               0, levels, buffer ) );
     } finally {
       buffer.position(dataPos);
     }
   }
- 
- 
+
+
   public static int gluBuild3DMipmaps( GL gl, int target, int internalFormat,
           int width, int height, int depth, int format, int type, ByteBuffer data ) {
     int dataPos = data.position();
@@ -788,23 +788,23 @@ public class Mipmap {
       int[] heightPowerOf2 = new int[1];
       int[] depthPowerOf2 = new int[1];
       int level, levels;
-    
+
       int rc = checkMipmapArgs( internalFormat, format, type );
       if( rc != 0 ) {
         return( rc );
       }
-    
+
       if( width < 1 || height < 1 || depth < 1 ) {
         return( GLU.GLU_INVALID_VALUE );
       }
-    
+
       if( type == GL2.GL_BITMAP ) {
         return( GLU.GLU_INVALID_ENUM );
       }
-    
+
       closestFit3D( gl, target, width, height, depth, internalFormat, format,
                     type, widthPowerOf2, heightPowerOf2, depthPowerOf2 );
-    
+
       levels = computeLog( widthPowerOf2[0] );
       level = computeLog( heightPowerOf2[0] );
       if( level > levels ) {
@@ -814,7 +814,7 @@ public class Mipmap {
       if( level > levels ) {
         levels = level;
       }
-    
+
       return( BuildMipmap.gluBuild3DMipmapLevelsCore( gl, target, internalFormat, width,
               height, depth, widthPowerOf2[0], heightPowerOf2[0], depthPowerOf2[0],
               format, type, 0, 0, levels, data ) );
@@ -822,27 +822,27 @@ public class Mipmap {
       data.position(dataPos);
     }
   }
-  
+
   public static int gluBuild3DMipmapLevels( GL gl, int target, int internalFormat,
           int width, int height, int depth, int format, int type, int userLevel,
           int baseLevel, int maxLevel, ByteBuffer data ) {
     int dataPos = data.position();
     try {
       int level, levels;
-    
+
       int rc = checkMipmapArgs( internalFormat, format, type );
       if( rc != 0 ) {
         return( rc );
       }
-    
+
       if( width < 1 || height < 1 || depth < 1 ) {
         return( GLU.GLU_INVALID_VALUE );
       }
-    
+
       if( type == GL2.GL_BITMAP ) {
         return( GLU.GLU_INVALID_ENUM );
       }
-    
+
       levels = computeLog( width );
       level = computeLog( height );
       if( level > levels ) {
@@ -852,12 +852,12 @@ public class Mipmap {
       if( level > levels ) {
         levels = level;
       }
-    
+
       levels += userLevel;
       if( !isLegalLevels( userLevel, baseLevel, maxLevel, levels ) ) {
         return( GLU.GLU_INVALID_VALUE );
       }
-    
+
       return( BuildMipmap.gluBuild3DMipmapLevelsCore( gl, target, internalFormat, width,
               height, depth, width, height, depth, format, type, userLevel,
               baseLevel, maxLevel, data ) );
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/PixelStorageModes.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/PixelStorageModes.java
index 0b1af8323..7eb98db35 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/PixelStorageModes.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/PixelStorageModes.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -129,7 +129,7 @@ public class PixelStorageModes {
    * Holds value of property unpackImageHeight.
    */
   private int unpackImageHeight;
-  
+
   /** Creates a new instance of PixelStorageModes */
   public PixelStorageModes() {
   }
@@ -421,6 +421,6 @@ public class PixelStorageModes {
 
     this.unpackImageHeight = unpackImageHeight;
   }
-  
-  
+
+
 }
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java
index 5f086ceff..9aca1fb03 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/ScaleInternal.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -55,9 +55,9 @@ import com.jogamp.common.nio.Buffers;
  * @author  Administrator
  */
 public class ScaleInternal {
-  
+
   public static final float UINT_MAX = (float)(0x00000000FFFFFFFF);
-  
+
   public static void scale_internal( int components, int widthin, int heightin,
           ShortBuffer datain, int widthout, int heightout, ShortBuffer dataout ) {
     float x, lowx, highx, convx, halfconvx;
@@ -69,7 +69,7 @@ public class ScaleInternal {
     float area;
     int i, j, k, yint, xint, xindex, yindex;
     int temp;
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
       HalveImage.halveImage( components, widthin, heightin, datain, dataout );
       return;
@@ -101,7 +101,7 @@ public class ScaleInternal {
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
         area = 0.0f;
-        
+
         y = lowy;
         yint = (int)Math.floor( y );
         while( y < highy ) {
@@ -111,10 +111,10 @@ public class ScaleInternal {
           } else {
             ypercent = yint + 1 - y;
           }
-          
+
           x = lowx;
           xint = (int)Math.floor( x );
-          
+
           while( x < highx ) {
             xindex = ( xint + widthin ) % widthin;
             if( highx < xint + 1 ) {
@@ -122,21 +122,21 @@ public class ScaleInternal {
             } else {
               xpercent = xint + 1 - x;
             }
-            
+
             percent = xpercent * ypercent;
             area += percent;
             temp = ( xindex + ( yindex * widthin) ) * components;
             for( k = 0; k < components; k++ ) {
-              totals[k] += datain.get( temp + k ) * percent; 
+              totals[k] += datain.get( temp + k ) * percent;
             }
-            
+
             xint++;
             x = xint;
           }
           yint++;
           y = yint;
         }
-        
+
         temp = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           // totals[] should be rounded in the case of enlarging an RGB
@@ -146,9 +146,9 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_ubyte( int components, int widthin, int heightin,
-                              ByteBuffer datain, int widthout, int heightout, 
+                              ByteBuffer datain, int widthout, int heightout,
                               ByteBuffer dataout, int element_size, int ysize, int group_size ) {
     float x, convx;
     float y, convy;
@@ -157,11 +157,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -169,9 +169,9 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_ubyte( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_ubyte( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size );
       return;
     }
@@ -181,35 +181,42 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
 
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -232,7 +239,7 @@ public class ScaleInternal {
             datain.position( temp_index );
             totals[k] += ( 0x000000FF & datain.get() ) * percent;
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -254,7 +261,7 @@ public class ScaleInternal {
             datain.position( temp_index );
             totals[k] += ( 0x000000FF & datain.get() ) * percent;
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -332,7 +339,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           dataout.position( outindex + k );
@@ -364,9 +371,9 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_byte( int components, int widthin, int heightin,
-                              ByteBuffer datain, int widthout, int heightout, 
+                              ByteBuffer datain, int widthout, int heightout,
                               ByteBuffer dataout, int element_size, int ysize,
                               int group_size ) {
     float x, convx;
@@ -376,11 +383,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -388,9 +395,9 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_byte( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_byte( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size );
       return;
     }
@@ -400,34 +407,41 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -450,7 +464,7 @@ public class ScaleInternal {
             datain.position( temp_index );
             totals[k] += datain.get() * percent;
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -472,7 +486,7 @@ public class ScaleInternal {
             datain.position( temp_index );
             totals[k] += datain.get() * percent;
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -536,7 +550,7 @@ public class ScaleInternal {
             totals[k] += datain.get() * percent;
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -550,7 +564,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           dataout.position( outindex + k );
@@ -582,10 +596,10 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_ushort( int components, int widthin, int heightin,
-                              ByteBuffer datain, int widthout, int heightout, 
-                              ShortBuffer dataout, int element_size, int ysize, 
+                              ByteBuffer datain, int widthout, int heightout,
+                              ShortBuffer dataout, int element_size, int ysize,
                               int group_size, boolean myswap_bytes ) {
     float x, convx;
     float y, convy;
@@ -594,11 +608,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -606,9 +620,9 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_ushort( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_ushort( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size, myswap_bytes );
       return;
     }
@@ -618,34 +632,41 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -680,7 +701,7 @@ public class ScaleInternal {
               totals[k] += ( 0x0000FFFF & datain.getShort()) * percent;
             }
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -714,7 +735,7 @@ public class ScaleInternal {
               totals[k] += ( 0x0000FFFF & datain.getShort()) * percent;
             }
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -813,7 +834,7 @@ public class ScaleInternal {
             }
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -831,7 +852,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           dataout.position( outindex + k );
@@ -863,10 +884,10 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_short( int components, int widthin, int heightin,
                               ByteBuffer datain, int widthout, int heightout,
-                              ShortBuffer dataout, int element_size, int ysize, 
+                              ShortBuffer dataout, int element_size, int ysize,
                               int group_size, boolean myswap_bytes ) {
     float x, convx;
     float y, convy;
@@ -875,11 +896,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -887,11 +908,11 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     int swapbuf; // unsigned buffer
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_short( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_short( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size, myswap_bytes );
       return;
     }
@@ -901,34 +922,41 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -966,7 +994,7 @@ public class ScaleInternal {
               totals[k] += datain.getShort() * percent;
             }
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -1003,7 +1031,7 @@ public class ScaleInternal {
               totals[k] += datain.getShort() * percent;
             }
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -1109,7 +1137,7 @@ public class ScaleInternal {
             }
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -1128,7 +1156,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           dataout.position( outindex + k );
@@ -1160,10 +1188,10 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_uint( int components, int widthin, int heightin,
-                              ByteBuffer datain, int widthout, int heightout, 
-                              IntBuffer dataout, int element_size, int ysize, 
+                              ByteBuffer datain, int widthout, int heightout,
+                              IntBuffer dataout, int element_size, int ysize,
                               int group_size, boolean myswap_bytes ) {
     float x, convx;
     float y, convy;
@@ -1172,11 +1200,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -1184,9 +1212,9 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_uint( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_uint( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size, myswap_bytes );
       return;
     }
@@ -1196,34 +1224,41 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -1258,7 +1293,7 @@ public class ScaleInternal {
               totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent;
             }
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -1292,7 +1327,7 @@ public class ScaleInternal {
               totals[k] += (0x00000000FFFFFFFF & datain.getInt()) * percent;
             }
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -1392,7 +1427,7 @@ public class ScaleInternal {
             }
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -1410,7 +1445,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         float value = 0.0f;
         for( k = 0; k < components; k++ ) {
@@ -1448,10 +1483,10 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_int( int components, int widthin, int heightin,
-                              ByteBuffer datain, int widthout, int heightout, 
-                              IntBuffer dataout, int element_size, int ysize, 
+                              ByteBuffer datain, int widthout, int heightout,
+                              IntBuffer dataout, int element_size, int ysize,
                               int group_size, boolean myswap_bytes ) {
     float x, convx;
     float y, convy;
@@ -1460,11 +1495,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -1472,11 +1507,11 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     long swapbuf; // unsigned buffer
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_int( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_int( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size, myswap_bytes );
       return;
     }
@@ -1486,34 +1521,41 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -1551,7 +1593,7 @@ public class ScaleInternal {
               totals[k] += datain.getInt() * percent;
             }
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -1588,7 +1630,7 @@ public class ScaleInternal {
               totals[k] += datain.getInt() * percent;
             }
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -1694,7 +1736,7 @@ public class ScaleInternal {
             }
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -1713,7 +1755,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           dataout.position( outindex + k );
@@ -1745,10 +1787,10 @@ public class ScaleInternal {
       }
     }
   }
-  
+
   public static void scale_internal_float( int components, int widthin, int heightin,
-                              ByteBuffer datain, int widthout, int heightout, 
-                              FloatBuffer dataout, int element_size, int ysize, 
+                              ByteBuffer datain, int widthout, int heightout,
+                              FloatBuffer dataout, int element_size, int ysize,
                               int group_size, boolean myswap_bytes ) {
     float x, convx;
     float y, convy;
@@ -1757,11 +1799,11 @@ public class ScaleInternal {
     float[] totals = new float[4];
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outindex;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -1769,11 +1811,11 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     float swapbuf; // unsigned buffer
-    
+
     if( (widthin == (widthout * 2)) && (heightin == (heightout * 2)) ) {
-      HalveImage.halveImage_float( components, widthin, heightin, datain, dataout, 
+      HalveImage.halveImage_float( components, widthin, heightin, datain, dataout,
                         element_size, ysize, group_size, myswap_bytes );
       return;
     }
@@ -1783,34 +1825,41 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convy_float;
-    
+
     for( i = 0; i < heightout; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightin)
         highy_int = heightin - 1;
       lowx_int = 0;
       lowx_float = 0.0f;
-      highx_int = convx_int;
-      highx_float = convx_float;
-      
+      // If we have a single column, fix the max width values
+      // to prevent buffer overflow
+      if (widthin == 1 && widthout == 1) {
+        highx_int = 0;
+        highx_float = 0.0f;
+      } else {
+        highx_int = convx_int;
+        highx_float = convx_float;
+      }
+
       for( j = 0; j < widthout; j++ ) {
-        
+
         // Ok, now apply box filter to box that goes from (lowx, lowy)
         // to (highx, highy) on input data into this pixel on output
         // data.
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // caulate the value for pixels in the 1st row
         xindex = lowx_int * group_size;
         if( ( highy_int > lowy_int ) && ( highx_int > lowx_int ) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * ysize;
           percent = y_percent * ( 1 - lowx_float );
@@ -1848,7 +1897,7 @@ public class ScaleInternal {
               totals[k] += datain.getFloat() * percent;
             }
           }
-          
+
           // calculate the value for pixels in the last row
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
@@ -1885,7 +1934,7 @@ public class ScaleInternal {
               totals[k] += datain.getFloat() * percent;
             }
           }
-          
+
           // calculate the value for the pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += ysize;
@@ -1991,7 +2040,7 @@ public class ScaleInternal {
             }
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + group_size + ( lowy_int + 1 ) * ysize;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -2010,7 +2059,7 @@ public class ScaleInternal {
           }
           temp0 += ysize;
         }
-        
+
         outindex = ( j + ( i * widthout ) ) * components;
         for( k = 0; k < components; k++ ) {
           dataout.position( outindex + k );
@@ -2042,28 +2091,28 @@ public class ScaleInternal {
       }
     }
   }
-  
-  public static void scaleInternalPackedPixel( int components, Extract extract, 
+
+  public static void scaleInternalPackedPixel( int components, Extract extract,
               int widthIn, int heightIn, ByteBuffer dataIn, int widthOut,
               int heightOut, ByteBuffer dataOut, int pixelSizeInBytes,
               int rowSizeInBytes, boolean isSwap ) {
     float x, convx;
     float y, convy;
     float percent;
-    
+
     // max components in a format is 4, so
     float[] totals = new float[4];
     float[] extractTotals = new float[4];
     float[] extractMoreTotals = new float[4];
     float[] shoveTotals = new float[4];
-    
+
     float area;
     int i, j, k, xindex;
-    
+
     int temp, temp0;
     int temp_index;
     int outIndex = 0;
-    
+
     int lowx_int, highx_int, lowy_int, highy_int;
     float x_percent, y_percent;
     float lowx_float, highx_float, lowy_float, highy_float;
@@ -2071,7 +2120,7 @@ public class ScaleInternal {
     int convy_int, convx_int;
     int l, m;
     int left, right;
-    
+
     if( widthIn == widthOut * 2 && heightIn == heightOut * 2 ) {
       HalveImage.halveImagePackedPixel( components, extract, widthIn, heightIn, dataIn, dataOut,
                               pixelSizeInBytes, rowSizeInBytes, isSwap );
@@ -2083,14 +2132,14 @@ public class ScaleInternal {
     convy_float = convy - convy_int;
     convx_int = (int)Math.floor( convx );
     convx_float = convx - convx_int;
-    
+
     area = convx * convy;
-    
+
     lowy_int = 0;
     lowy_float = 0.0f;
     highy_int = convy_int;
     highy_float = convx_float;
-    
+
     for( i = 0; i < heightOut; i++ ) {
       // Clamp here to be sure we don't read beyond input buffer.
       if (highy_int >= heightIn)
@@ -2099,16 +2148,16 @@ public class ScaleInternal {
       lowx_float = 0.0f;
       highx_int = convx_int;
       highx_float = convx_float;
-      
+
       for( j = 0; j < widthOut; j++ ) {
         // ok now apply box filter to box that goes from( lowx, lowy )
         // to ( highx, highy ) on input data into this pixel on output data
         totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
-        
+
         // calculate that value for pixels in the 1st row
         xindex = lowx_int * pixelSizeInBytes;
         if( (highy_int > lowy_int) && (highx_int > lowx_int) ) {
-          
+
           y_percent = 1 - lowy_float;
           temp = xindex + lowy_int * rowSizeInBytes;
           percent = y_percent * ( 1 - lowx_float );
@@ -2135,7 +2184,7 @@ public class ScaleInternal {
             totals[k] += extractTotals[k] * percent;
           }
           // calculate the value for pixels in the last row
-          
+
           y_percent = highy_float;
           percent = y_percent * ( 1 - lowx_float );
           temp = xindex + highy_int * rowSizeInBytes;
@@ -2158,7 +2207,7 @@ public class ScaleInternal {
           for( k = 0; k < components; k++ ) {
             totals[k] += extractTotals[k] * percent;
           }
-          
+
           // calculate the value for pixels in the 1st and last column
           for( m = lowy_int + 1; m < highy_int; m++ ) {
             left += rowSizeInBytes;
@@ -2228,7 +2277,7 @@ public class ScaleInternal {
             totals[k] += extractTotals[k] * percent;
           }
         }
-        
+
         // this is for the pixels in the body
         temp0 = xindex + pixelSizeInBytes + ( lowy_int + 1 ) * rowSizeInBytes;
         for( m = lowy_int + 1; m < highy_int; m++ ) {
@@ -2243,7 +2292,7 @@ public class ScaleInternal {
           }
           temp0 += rowSizeInBytes;
         }
-        
+
         outIndex = ( j + ( i * widthOut ) );
         for( k = 0; k < components; k++ ) {
           shoveTotals[k] = totals[k] / area;
@@ -2276,7 +2325,7 @@ public class ScaleInternal {
     }
     assert( outIndex == ( widthOut * heightOut - 1) );
   }
-  
+
   public static void scaleInternal3D( int components, int widthIn, int heightIn,
           int depthIn, ShortBuffer dataIn, int widthOut, int heightOut,
           int depthOut, ShortBuffer dataOut ) {
@@ -2290,9 +2339,9 @@ public class ScaleInternal {
     float volume;
     int i, j, d, k, zint, yint, xint, xindex, yindex, zindex;
     int temp;
-    
+
     lowy = highy = lowx = highx = 0.0f;
-    
+
     convz = (float)depthIn / depthOut;
     convy = (float)heightIn / heightOut;
     convx = (float)widthIn / widthOut;
@@ -2326,13 +2375,13 @@ public class ScaleInternal {
             highz = x + 0.5f;
             lowz = x - 0.5f;
           }
-          
+
           // Ok, now apply box filter to box that goes from ( lowx, lowy, lowz )
           // to ( highx, highy, highz ) on input data into this pixel on output data
-          
+
           totals[0] = totals[1] = totals[2] = totals[3] = 0.0f;
           volume = 0.0f;
-          
+
           z = lowz;
           zint = (int)(Math.floor( z ) );
           while( z < highz ) {
@@ -2342,7 +2391,7 @@ public class ScaleInternal {
             } else {
               zpercent = zint + 1 - z;
             }
-            
+
             y = lowy;
             yint = (int)(Math.floor( y ) );
             while( y < highy ) {
@@ -2352,10 +2401,10 @@ public class ScaleInternal {
               } else {
                 ypercent = yint + 1 - y;
               }
-              
+
               x = lowx;
               xint = (int)(Math.floor( x ) );
-              
+
               while( x < highx ) {
                 xindex = (xint + widthIn ) % widthIn;
                 if( highx < xint + 1 ) {
@@ -2363,10 +2412,10 @@ public class ScaleInternal {
                 } else {
                   xpercent = xint + 1 - x;
                 }
-                
+
                 percent = xpercent * ypercent * zpercent;
                 volume += percent;
-                
+
                 temp = (xindex + ( yindex *widthIn) + (zindex * widthIn *heightIn)) * components;
                 for( k = 0; k < components; k++ ) {
                   assert( 0 <= (temp+k) && (temp+k) < (widthIn * heightIn * depthIn * components) );
@@ -2381,7 +2430,7 @@ public class ScaleInternal {
             zint++;
             z = zint;
           } // while z
-          
+
           temp = ( j + ( i * widthOut ) + (d * widthOut * heightOut ) ) * components;
           for( k = 0; k < components; k++ ) {
             // totals should be rounded in the case of enlarging an rgb ramp when the type is 332 or 4444
@@ -2392,48 +2441,48 @@ public class ScaleInternal {
       }
     }
   }
-  
-  public static int gluScaleImage3D( GL gl, int format, int widthIn, int heightIn, 
-          int depthIn, int typeIn, ByteBuffer dataIn, int widthOut, int heightOut, 
+
+  public static int gluScaleImage3D( GL gl, int format, int widthIn, int heightIn,
+          int depthIn, int typeIn, ByteBuffer dataIn, int widthOut, int heightOut,
           int depthOut, int typeOut, ByteBuffer dataOut ) {
     int components;
     ShortBuffer beforeImage, afterImage;
     PixelStorageModes psm = new PixelStorageModes();
-    
+
     if( widthIn == 0 || heightIn == 0 || depthIn == 0 ||
             widthOut == 0 || heightOut == 0 || depthOut == 0 ) {
       return( 0 );
     }
-    
+
     if( widthIn < 0 || heightIn < 0 || depthIn < 0 ||
             widthOut < 0 || heightOut < 0 || depthOut < 0 ) {
       return( GLU.GLU_INVALID_VALUE );
     }
-    
-    if( !Mipmap.legalFormat(format) || !Mipmap.legalType(typeIn) || 
+
+    if( !Mipmap.legalFormat(format) || !Mipmap.legalType(typeIn) ||
             !Mipmap.legalType(typeOut) || typeIn == GL2.GL_BITMAP ||
             typeOut == GL2.GL_BITMAP ) {
       return( GLU.GLU_INVALID_ENUM );
     }
-    
+
     if( !Mipmap.isLegalFormatForPackedPixelType( format, typeIn ) ) {
       return( GLU.GLU_INVALID_OPERATION );
     }
-    
+
     if( !Mipmap.isLegalFormatForPackedPixelType( format, typeOut ) ) {
       return( GLU.GLU_INVALID_OPERATION );
     }
-    
+
     try {
-        beforeImage = Buffers.newDirectByteBuffer( Mipmap.imageSize3D( widthIn, 
+        beforeImage = Buffers.newDirectByteBuffer( Mipmap.imageSize3D( widthIn,
                 heightIn, depthIn, format, GL2.GL_UNSIGNED_SHORT ) ).asShortBuffer();
-        afterImage = Buffers.newDirectByteBuffer( Mipmap.imageSize3D( widthIn, 
+        afterImage = Buffers.newDirectByteBuffer( Mipmap.imageSize3D( widthIn,
                 heightIn, depthIn, format, GL2.GL_UNSIGNED_SHORT ) ).asShortBuffer();
     } catch( OutOfMemoryError err ) {
       return( GLU.GLU_OUT_OF_MEMORY );
     }
     Mipmap.retrieveStoreModes3D( gl, psm );
-    
+
     Image.fillImage3D( psm, widthIn, heightIn, depthIn, format, typeIn,
             Mipmap.is_index( format ), dataIn, beforeImage );
     components = Mipmap.elements_per_group( format, 0 );
@@ -2441,7 +2490,7 @@ public class ScaleInternal {
             beforeImage, widthOut, heightOut, depthOut, afterImage );
     Image.emptyImage3D( psm, widthOut, heightOut, depthOut, format, typeOut,
             Mipmap.is_index( format ), afterImage, dataOut );
-    
+
     return( 0 );
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/glu/mipmap/Type_Widget.java b/src/jogl/classes/jogamp/opengl/glu/mipmap/Type_Widget.java
index 38113f601..dc401880d 100644
--- a/src/jogl/classes/jogamp/opengl/glu/mipmap/Type_Widget.java
+++ b/src/jogl/classes/jogamp/opengl/glu/mipmap/Type_Widget.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,176 +51,176 @@ import java.nio.*;
  * @author  Administrator
  */
 public class Type_Widget {
-  
+
   ByteBuffer buffer;
-  
+
   /** Creates a new instance of Type_Widget */
   public Type_Widget() {
     // can't make this direct, because JVM doesn't allocate small direct buffers efficiently
     // see https://jogamp.org/bugzilla/show_bug.cgi?id=463 for details
     buffer = ByteBuffer.allocate( 4 );
   }
-  
+
   public void setUB0( byte b ) {
     buffer.position( 0 );
     buffer.put( b );
   }
-  
+
   public byte getUB0() {
     buffer.position( 0 );
     return( buffer.get() );
   }
-  
+
   public void setUB1( byte b ) {
     buffer.position( 1 );
     buffer.put( b );
   }
-  
+
   public byte getUB1() {
     buffer.position( 1 );
     return( buffer.get() );
   }
-  
+
   public void setUB2( byte b ) {
     buffer.position( 2 );
     buffer.put( b );
   }
-  
+
   public byte getUB2() {
     buffer.position( 2 );
     return( buffer.get() );
   }
-  
+
   public void setUB3( byte b ) {
     buffer.position( 3 );
     buffer.put( b );
   }
-  
+
   public byte getUB3() {
     buffer.position( 3 );
     return( buffer.get() );
   }
-  
+
   public void setUS0( short s ) {
     buffer.position( 0 );
     buffer.putShort( s );
   }
-  
+
   public short getUS0() {
     buffer.position( 0 );
     return( buffer.getShort() );
   }
-  
+
   public void setUS1( short s ) {
     buffer.position( 2 );
     buffer.putShort( s );
   }
-  
+
   public short getUS1() {
    buffer.position( 2 );
    return( buffer.getShort() );
   }
-  
+
   public void setUI( int i ) {
     buffer.position( 0 );
     buffer.putInt( i );
   }
-  
+
   public int getUI() {
     buffer.position( 0 );
     return( buffer.getInt() );
   }
-  
+
   public void setB0( byte b ) {
     buffer.position( 0 );
     buffer.put( b );
   }
-  
+
   public byte getB0() {
     buffer.position( 0 );
     return( buffer.get() );
   }
-  
+
   public void setB1( byte b ) {
     buffer.position( 1 );
     buffer.put( b );
   }
-  
+
   public byte getB1() {
     buffer.position( 1 );
     return( buffer.get() );
   }
-  
+
   public void setB2( byte b ) {
     buffer.position( 2 );
     buffer.put( b );
   }
-  
+
   public byte getB2() {
     buffer.position( 2 );
     return( buffer.get() );
   }
-  
+
   public void setB3( byte b ) {
     buffer.position( 3 );
     buffer.put( b );
   }
-  
+
   public byte getB3() {
     buffer.position( 3 );
     return( buffer.get() );
   }
-  
+
   public void setS0( short s ) {
     buffer.position( 0 );
     buffer.putShort( s );
   }
-  
+
   public short getS0() {
     buffer.position( 0 );
     return( buffer.getShort() );
   }
-  
+
   public void setS1( short s ) {
     buffer.position( 2 );
     buffer.putShort( s );
   }
-  
+
   public short getS1() {
     buffer.position( 2 );
     return( buffer.getShort() );
   }
-  
+
   public void setI( int i ) {
     buffer.position( 0 );
     buffer.putInt( i );
   }
-  
+
   public int getI() {
     buffer.position( 0 );
     return( buffer.getInt() );
   }
-  
+
   public void setF( float f ) {
     buffer.position( 0 );
     buffer.putFloat( f );
   }
-  
+
   public float getF() {
     buffer.position( 0 );
     return( buffer.getFloat() );
   }
-  
+
   public ByteBuffer getBuffer() {
     buffer.rewind();
     return( buffer );
   }
-  
+
   public static void main( String args[] ) {
     Type_Widget t = new Type_Widget();
     t.setI( 1000000 );
-    
+
     System.out.println("int: " + Integer.toHexString( t.getI() ) );
-    
+
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Arc.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Arc.java
index 422f8d4df..df2b9a147 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Arc.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Arc.java
@@ -72,7 +72,7 @@ public class Arc {
 
   /**
    * Makes new arc at specified side
-   * 
+   *
    * @param side
    *            which side doeas this arc form
    */
@@ -86,7 +86,7 @@ public class Arc {
 
   /**
    * Sets side the arc is at
-   * 
+   *
    * @param side
    *            arc side
    */
@@ -104,7 +104,7 @@ public class Arc {
     type &= ~(0x7 << 8);
   }
 
-  // this one replaces enum arc_side 
+  // this one replaces enum arc_side
   /**
    * Side not specified
    */
@@ -147,7 +147,7 @@ public class Arc {
 
   /**
    * Appends arc to the list
-   * 
+   *
    * @param jarc
    *            arc to be append
    * @return this
@@ -169,7 +169,7 @@ public class Arc {
 
   /**
    * Unused
-   * 
+   *
    * @return true
    */
   public boolean check() {
@@ -187,7 +187,7 @@ public class Arc {
 
   /**
    * Returns tail of linked list coords
-   * 
+   *
    * @return tail coords
    */
   public float[] tail() {
@@ -197,7 +197,7 @@ public class Arc {
 
   /**
    * Returns head of linked list coords
-   * 
+   *
    * @return head coords
    */
   public float[] head() {
@@ -207,7 +207,7 @@ public class Arc {
 
   /**
    * Returns whether arc is marked with arc_tag
-   * 
+   *
    * @return is arc marked with arc_tag
    */
   public boolean ismarked() {
@@ -241,7 +241,7 @@ public class Arc {
 
   /**
    * Returns whether arc is marked tail
-   * 
+   *
    * @return is tail
    */
   public boolean getitail() {
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcSdirSorter.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcSdirSorter.java
index f4ad70193..c299b10af 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcSdirSorter.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcSdirSorter.java
@@ -44,7 +44,7 @@ public class ArcSdirSorter {
   /**
    * Makes new ArcSdirSorter with Subdivider
    * @param subdivider subdivider
-   */ 
+   */
   public ArcSdirSorter(Subdivider subdivider) {
     //TODO
     //            System.out.println("TODO arcsdirsorter.constructor");
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcTdirSorter.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcTdirSorter.java
index be72c53d2..1a584c396 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcTdirSorter.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/ArcTdirSorter.java
@@ -43,7 +43,7 @@ public class ArcTdirSorter {
   /**
    * Makes new ArcSdirSorter with Subdivider
    * @param subdivider subdivider
-   */ 
+   */
   public ArcTdirSorter(Subdivider subdivider) {
     // TODO Auto-generated constructor stub
     //            System.out.println("TODO arcTsorter.konstruktor");
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Backend.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Backend.java
index 610a19556..3e974247b 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Backend.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Backend.java
@@ -67,7 +67,7 @@ public abstract class Backend {
   protected SurfaceEvaluator surfaceEvaluator;
 
   /**
-   * Makes new backend 
+   * Makes new backend
    */
   public Backend() {
     // curveEvaluator = new OpenGLCurveEvaluator();
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Bin.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Bin.java
index df8b16ab5..17437ef01 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Bin.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Bin.java
@@ -143,7 +143,7 @@ public class Bin {
   /**
    * Returns next arc in linked list
    * @return next arc
-   * 
+   *
    */
   private Arc nextarc() {
     // DONE
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Breakpt.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Breakpt.java
index f45571dac..f84640d28 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Breakpt.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Breakpt.java
@@ -36,9 +36,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Class holding break point parameters
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class Breakpt {
 
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfArcs.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfArcs.java
index aaa8cb5f2..b67764c30 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfArcs.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfArcs.java
@@ -2,9 +2,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Class replacing C language pointer
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class CArrayOfArcs {
   /**
@@ -24,7 +24,7 @@ public class CArrayOfArcs {
 
   /**
    * Makes new CArray
-   * 
+   *
    * @param array
    *            underlaying array
    * @param pointer
@@ -38,7 +38,7 @@ public class CArrayOfArcs {
 
   /**
    * Makes new CArray from other CArray
-   * 
+   *
    * @param carray
    *            reference array
    */
@@ -50,7 +50,7 @@ public class CArrayOfArcs {
 
   /**
    * Makes new CArray with pointer set to 0
-   * 
+   *
    * @param ctlarray
    *            underlaying array
    */
@@ -61,7 +61,7 @@ public class CArrayOfArcs {
 
   /**
    * Returns element at pointer
-   * 
+   *
    * @return element at pointer
    */
   public Arc get() {
@@ -78,7 +78,7 @@ public class CArrayOfArcs {
 
   /**
    * Sets element at pointer
-   * 
+   *
    * @param f
    *            desired value
    */
@@ -89,7 +89,7 @@ public class CArrayOfArcs {
 
   /**
    * Returns array element at specified index
-   * 
+   *
    * @param i
    *            array index
    * @return element at index
@@ -100,7 +100,7 @@ public class CArrayOfArcs {
 
   /**
    * Returns array element at specified index relatively to pointer
-   * 
+   *
    * @param i
    *            relative index
    * @return element at relative index
@@ -111,7 +111,7 @@ public class CArrayOfArcs {
 
   /**
    * Sets value of element at specified index relatively to pointer
-   * 
+   *
    * @param i
    *            relative index
    * @param value
@@ -123,7 +123,7 @@ public class CArrayOfArcs {
 
   /**
    * Lessens pointer by value
-   * 
+   *
    * @param i
    *            lessen by
    */
@@ -134,7 +134,7 @@ public class CArrayOfArcs {
 
   /**
    * Returns pointer value
-   * 
+   *
    * @return pointer value
    */
   public int getPointer() {
@@ -143,7 +143,7 @@ public class CArrayOfArcs {
 
   /**
    * Sets ponter value
-   * 
+   *
    * @param pointer
    *            pointer value to be set
    */
@@ -156,7 +156,7 @@ public class CArrayOfArcs {
 
   /**
    * Raises pointer by value
-   * 
+   *
    * @param i
    *            raise by
    */
@@ -175,7 +175,7 @@ public class CArrayOfArcs {
 
   /**
    * Returns underlaying array
-   * 
+   *
    * @return underlaying array
    */
   public Arc[] getArray() {
@@ -184,7 +184,7 @@ public class CArrayOfArcs {
 
   /**
    * Sets underlaying array
-   * 
+   *
    * @param array
    *            underlaying array
    */
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfBreakpts.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfBreakpts.java
index 5112b07fc..b5f588960 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfBreakpts.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfBreakpts.java
@@ -2,9 +2,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Class replacing C language pointer
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class CArrayOfBreakpts {
   /**
@@ -19,7 +19,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Makes new CArray
-   * 
+   *
    * @param array
    *            underlaying array
    * @param pointer
@@ -32,7 +32,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Makes new CArray from other CArray
-   * 
+   *
    * @param carray
    *            reference array
    */
@@ -43,7 +43,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Returns element at pointer
-   * 
+   *
    * @return element at pointer
    */
   public Breakpt get() {
@@ -59,7 +59,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Sets element at pointer
-   * 
+   *
    * @param f
    *            desired value
    */
@@ -70,7 +70,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Returns array element at specified index
-   * 
+   *
    * @param i
    *            array index
    * @return element at index
@@ -81,7 +81,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Lessens pointer by value
-   * 
+   *
    * @param i
    *            lessen by
    */
@@ -92,7 +92,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Returns pointer value
-   * 
+   *
    * @return pointer value
    */
   public int getPointer() {
@@ -101,7 +101,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Sets ponter value
-   * 
+   *
    * @param pointer
    *            pointer value to be set
    */
@@ -111,7 +111,7 @@ public class CArrayOfBreakpts {
 
   /**
    * Raises pointer by value
-   * 
+   *
    * @param i
    *            raise by
    */
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfFloats.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfFloats.java
index 39ef841ec..d9e4d0ff1 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfFloats.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfFloats.java
@@ -2,9 +2,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Class replacing C language pointer
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class CArrayOfFloats {
 
@@ -25,7 +25,7 @@ public class CArrayOfFloats {
 
   /**
    * Makes new CArray
-   * 
+   *
    * @param array
    *            underlaying array
    * @param pointer
@@ -39,7 +39,7 @@ public class CArrayOfFloats {
 
   /**
    * Makes new CArray from other CArray
-   * 
+   *
    * @param carray
    *            reference array
    */
@@ -51,7 +51,7 @@ public class CArrayOfFloats {
 
   /**
    * Makes new CArray with pointer set to 0
-   * 
+   *
    * @param ctlarray
    *            underlaying array
    */
@@ -62,7 +62,7 @@ public class CArrayOfFloats {
 
   /**
    * Returns element at pointer
-   * 
+   *
    * @return element at pointer
    */
   public float get() {
@@ -79,7 +79,7 @@ public class CArrayOfFloats {
 
   /**
    * Sets element at pointer
-   * 
+   *
    * @param f
    *            desired value
    */
@@ -90,7 +90,7 @@ public class CArrayOfFloats {
 
   /**
    * Returns array element at specified index
-   * 
+   *
    * @param i
    *            array index
    * @return element at index
@@ -101,7 +101,7 @@ public class CArrayOfFloats {
 
   /**
    * Returns array element at specified index relatively to pointer
-   * 
+   *
    * @param i
    *            relative index
    * @return element at relative index
@@ -112,7 +112,7 @@ public class CArrayOfFloats {
 
   /**
    * Sets value of element at specified index relatively to pointer
-   * 
+   *
    * @param i
    *            relative index
    * @param value
@@ -124,7 +124,7 @@ public class CArrayOfFloats {
 
   /**
    * Lessens pointer by value
-   * 
+   *
    * @param i
    *            lessen by
    */
@@ -135,7 +135,7 @@ public class CArrayOfFloats {
 
   /**
    * Returns pointer value
-   * 
+   *
    * @return pointer value
    */
   public int getPointer() {
@@ -144,7 +144,7 @@ public class CArrayOfFloats {
 
   /**
    * Sets ponter value
-   * 
+   *
    * @param pointer
    *            pointer value to be set
    */
@@ -157,7 +157,7 @@ public class CArrayOfFloats {
 
   /**
    * Raises pointer by value
-   * 
+   *
    * @param i
    *            raise by
    */
@@ -176,7 +176,7 @@ public class CArrayOfFloats {
 
   /**
    * Returns underlaying array
-   * 
+   *
    * @return underlaying array
    */
   public float[] getArray() {
@@ -185,7 +185,7 @@ public class CArrayOfFloats {
 
   /**
    * Sets underlaying array
-   * 
+   *
    * @param array
    *            underlaying array
    */
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfQuiltspecs.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfQuiltspecs.java
index 4b21f2d50..e7bbac16a 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfQuiltspecs.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/CArrayOfQuiltspecs.java
@@ -2,9 +2,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Class replacing C language pointer
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class CArrayOfQuiltspecs {
   /**
@@ -19,7 +19,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Makes new CArray
-   * 
+   *
    * @param array
    *            underlaying array
    * @param pointer
@@ -32,7 +32,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Makes new CArray from other CArray
-   * 
+   *
    * @param carray
    *            reference array
    */
@@ -43,7 +43,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Makes new CArray with pointer set to 0
-   * 
+   *
    * @param array
    *            underlaying array
    */
@@ -54,7 +54,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Returns element at pointer
-   * 
+   *
    * @return element at pointer
    */
   public Quiltspec get() {
@@ -70,7 +70,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Sets element at pointer
-   * 
+   *
    * @param f
    *            desired value
    */
@@ -81,7 +81,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Returns array element at specified index
-   * 
+   *
    * @param i
    *            array index
    * @return element at index
@@ -92,7 +92,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Lessens pointer by value
-   * 
+   *
    * @param i
    *            lessen by
    */
@@ -103,7 +103,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Returns pointer value
-   * 
+   *
    * @return pointer value
    */
   public int getPointer() {
@@ -112,7 +112,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Sets ponter value
-   * 
+   *
    * @param pointer
    *            pointer value to be set
    */
@@ -122,7 +122,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Raises pointer by value
-   * 
+   *
    * @param i
    *            raise by
    */
@@ -141,7 +141,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Returns underlaying array
-   * 
+   *
    * @return underlaying array
    */
   public Quiltspec[] getArray() {
@@ -150,7 +150,7 @@ public class CArrayOfQuiltspecs {
 
   /**
    * Sets underlaying array
-   * 
+   *
    * @param array
    *            underlaying array
    */
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Curve.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Curve.java
index 786781723..ea3a3d14e 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Curve.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Curve.java
@@ -103,7 +103,7 @@ public class Curve {
 
   /**
    * Makes new Curve
-   * 
+   *
    * @param geo
    * @param pta
    * @param ptb
@@ -143,7 +143,7 @@ public class Curve {
     range[0] = qs.get().breakpoints[qs.get().index];
     range[1] = qs.get().breakpoints[qs.get().index + 1];
     range[2] = range[1] - range[0];
-    // TODO it is necessary to solve problem with "this" pointer here 
+    // TODO it is necessary to solve problem with "this" pointer here
     if (range[0] != pta[0]) {
       //                System.out.println("TODO curve.Curve-range0");
       // Curve lower=new Curve(this,pta,0);
@@ -229,7 +229,7 @@ public class Curve {
 
   /**
    * Tells whether curve needs subdivision
-   * 
+   *
    * @return curve needs subdivison
    */
   public boolean needsSamplingSubdivision() {
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Flist.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Flist.java
index 6983691d9..f9c4c2d6f 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Flist.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Flist.java
@@ -45,12 +45,12 @@ public class Flist {
 
   /**
    * Data elements end index
-   * 
+   *
    */
   public int end;
 
   /**
-   *Data elements start index 
+   *Data elements start index
    */
   public int start;
 
@@ -80,7 +80,7 @@ public class Flist {
   }
 
   /**
-   * Removes duplicate array elemnts 
+   * Removes duplicate array elemnts
    */
   public void filter() {
     // INFO the aim of this method is to remove duplicates from array
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotspec.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotspec.java
index 114832a1c..1dcf393a9 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotspec.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotspec.java
@@ -36,9 +36,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Knot vector specification
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class Knotspec {
 
@@ -314,7 +314,7 @@ public class Knotspec {
 
   /**
    * Copies control points
-   * 
+   *
    * @param _inpt
    *            input control points
    * @param _outpt
@@ -346,7 +346,7 @@ public class Knotspec {
 
   /**
    * Copies one control point to other
-   * 
+   *
    * @param topt
    *            source control point
    * @param frompt
@@ -374,7 +374,7 @@ public class Knotspec {
 
   /**
    * Inserts a knot
-   * 
+   *
    * @param _p
    *            inserted knot
    */
@@ -402,7 +402,7 @@ public class Knotspec {
         }
       }
 
-    } else {//code for curve 
+    } else {//code for curve
       if (this.equals(kspectotrans)) {
         insert(p);
       } else {
@@ -428,7 +428,7 @@ public class Knotspec {
 
   /**
    * Inserts a knot and computes new control points
-   * 
+   *
    * @param p
    *            inserted knot
    */
@@ -490,7 +490,7 @@ public class Knotspec {
 
   /**
    * Copies one control point to another
-   * 
+   *
    * @param topt
    *            source ctrl point
    * @param frompt
@@ -519,7 +519,7 @@ public class Knotspec {
 
   /**
    * Computes new control point
-   * 
+   *
    * @param x
    *            first point
    * @param y
@@ -549,7 +549,7 @@ public class Knotspec {
                                 * z.getRelative(0)));
       break;
     default:
-      //no need of default - see previous method and its case statement                
+      //no need of default - see previous method and its case statement
       //                System.out.println("TODO pt_oo_sum default");
       break;
     }
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java
index aac4dfc52..571f44f06 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Knotvector.java
@@ -36,9 +36,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Knot vector used in curve specification
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class Knotvector {
 
@@ -75,7 +75,7 @@ public class Knotvector {
 
   /**
    * Makes new knotvector
-   * 
+   *
    * @param nknots
    *            number of knots
    * @param stride
@@ -92,7 +92,7 @@ public class Knotvector {
 
   /**
    * Initializes knotvector
-   * 
+   *
    * @param nknots
    *            number of knots
    * @param stride
@@ -116,7 +116,7 @@ public class Knotvector {
 
   /**
    * Validates knot vector parameters
-   * 
+   *
    * @return knot vector validity
    */
   public int validate() {
@@ -154,7 +154,7 @@ public class Knotvector {
 
   /**
    * Show specified message
-   * 
+   *
    * @param msg
    *            message to be shown
    */
@@ -166,7 +166,7 @@ public class Knotvector {
 
   /**
    * Compares two knots for equality
-   * 
+   *
    * @param a
    *            first knot
    * @param b
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Mapdesc.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Mapdesc.java
index bd5d2db98..86638a827 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Mapdesc.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Mapdesc.java
@@ -112,7 +112,7 @@ public class Mapdesc {
   float clampfactor;
 
   /**
-   * Value of N_MINSAVINGS property 
+   * Value of N_MINSAVINGS property
    */
   private float minsavings;
 
@@ -162,7 +162,7 @@ public class Mapdesc {
   private float[] bboxsize;
 
   /**
-   * Makes new mapdesc 
+   * Makes new mapdesc
    * @param type map type
    * @param rational is rational
    * @param ncoords number of control points coords
@@ -318,7 +318,7 @@ public class Mapdesc {
   }
 
   /**
-   * Tells whether map is culling 
+   * Tells whether map is culling
    * @return is map culling
    */
   public boolean isCulling() {
@@ -327,7 +327,7 @@ public class Mapdesc {
   }
 
   /**
-   * Tells whether map is constantly sampling 
+   * Tells whether map is constantly sampling
    * @return is map constant sampling
    */
   public boolean isConstantSampling() {
@@ -335,7 +335,7 @@ public class Mapdesc {
   }
 
   /**
-   * Tells whether map is domain sampling 
+   * Tells whether map is domain sampling
    * @return is map domain sampling
    */
   public boolean isDomainSampling() {
@@ -343,7 +343,7 @@ public class Mapdesc {
   }
 
   /**
-   * Returns property of specified tag value 
+   * Returns property of specified tag value
    * @param tag property tag
    * @return property value
    */
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/O_nurbscurve.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/O_nurbscurve.java
index 05c89ebcf..a686da696 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/O_nurbscurve.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/O_nurbscurve.java
@@ -68,7 +68,7 @@ public class O_nurbscurve {
 
   /**
    * Makes new O_nurbscurve
-   * @param realType type of curve 
+   * @param realType type of curve
    */
   public O_nurbscurve(int realType) {
     // DONE
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Patchlist.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Patchlist.java
index f1e499a28..8c2922565 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Patchlist.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Patchlist.java
@@ -52,7 +52,7 @@ public class Patchlist {
   private Patch patch;
 
   /**
-   * Makes new list of patches 
+   * Makes new list of patches
    * @param quilts list of quilts
    * @param pta low border
    * @param ptb high border
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Property.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Property.java
index 25b4dc441..79f36ce43 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Property.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Property.java
@@ -36,9 +36,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Class representing property
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class Property {
 
@@ -59,7 +59,7 @@ public class Property {
 
   /**
    * Makes new property with given parameters
-   * 
+   *
    * @param type
    *            property type
    * @param tag
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Renderhints.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Renderhints.java
index 4729e2421..7c636122f 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Renderhints.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Renderhints.java
@@ -35,7 +35,7 @@ package jogamp.opengl.glu.nurbs;
  */
 
 /**
- * Class holding rendering params 
+ * Class holding rendering params
  * @author Tomas Hrasky
  *
  */
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/Subdivider.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/Subdivider.java
index 37774f811..4d8296cca 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/Subdivider.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/Subdivider.java
@@ -41,7 +41,7 @@ package jogamp.opengl.glu.nurbs;
  */
 public class Subdivider {
   /**
-   * Cull type 
+   * Cull type
    */
   public static final int CULL_TRIVIAL_REJECT = 0;
 
@@ -76,7 +76,7 @@ public class Subdivider {
   private int subdivisions;
 
   /**
-   * U step when using domain distance sampling 
+   * U step when using domain distance sampling
    */
   private float domain_distance_u_rate;
 
@@ -375,7 +375,7 @@ public class Subdivider {
   }
 
   /**
-   * Sample 
+   * Sample
    * @param source
    * @param patchlist
    * @param subdivisions
diff --git a/src/jogl/classes/jogamp/opengl/glu/nurbs/TrimVertex.java b/src/jogl/classes/jogamp/opengl/glu/nurbs/TrimVertex.java
index e88d69709..1025afb7c 100644
--- a/src/jogl/classes/jogamp/opengl/glu/nurbs/TrimVertex.java
+++ b/src/jogl/classes/jogamp/opengl/glu/nurbs/TrimVertex.java
@@ -36,9 +36,9 @@ package jogamp.opengl.glu.nurbs;
 
 /**
  * Holds vertex used in trim
- * 
+ *
  * @author Tomas Hrasky
- * 
+ *
  */
 public class TrimVertex {
 
diff --git a/src/jogl/classes/jogamp/opengl/glu/registry/Registry.java b/src/jogl/classes/jogamp/opengl/glu/registry/Registry.java
index 3d669d9bb..9c8523e51 100644
--- a/src/jogl/classes/jogamp/opengl/glu/registry/Registry.java
+++ b/src/jogl/classes/jogamp/opengl/glu/registry/Registry.java
@@ -6,15 +6,15 @@
  * this file except in compliance with the License. You may obtain a copy
  * of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
  * Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
- * 
+ *
  * http://oss.sgi.com/projects/FreeB
- * 
+ *
  * Note that, as provided in the License, the Software is distributed on an
  * "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  * DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  * CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  * PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
- * 
+ *
  * NOTE:  The Original Code (as defined below) has been licensed to Sun
  * Microsystems, Inc. ("Sun") under the SGI Free Software License B
  * (Version 1.1), shown above ("SGI License").   Pursuant to Section
@@ -30,7 +30,7 @@
  * Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  * Copyright in any portions created by third parties is as indicated
  * elsewhere herein. All Rights Reserved.
- * 
+ *
  * Additional Notice Provisions: The application programming interfaces
  * established by SGI in conjunction with the Original Code are The
  * OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
@@ -51,11 +51,11 @@ import javax.media.opengl.glu.GLU;
  * @author  Administrator
  */
 public class Registry {
-  
+
   /** Creates a new instance of Registry */
   public Registry() {
   }
-  
+
   public static String gluGetString(int name) {
     if( name == GLU.GLU_VERSION ) {
       return( "1.3" );
@@ -64,7 +64,7 @@ public class Registry {
     }
     return( null );
   }
-  
+
   public static boolean gluCheckExtension( String extName, String extString ) {
     if( extName == null || extString == null ) {
       return( false );
diff --git a/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQHeap.java b/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQHeap.java
index 474056cc3..1ac0fd438 100644
--- a/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQHeap.java
+++ b/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQHeap.java
@@ -81,6 +81,7 @@ class PriorityQHeap extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqHeapDeletePriorityQ */
+    @Override
     void pqDeletePriorityQ() {
         handles = null;
         nodes = null;
@@ -137,6 +138,7 @@ class PriorityQHeap extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqHeapInit */
+    @Override
     boolean pqInit() {
         int i;
 
@@ -152,6 +154,7 @@ class PriorityQHeap extends jogamp.opengl.glu.tessellator.PriorityQ {
 
 /* really __gl_pqHeapInsert */
 /* returns LONG_MAX iff out of memory */
+    @Override
     int pqInsert(Object keyNew) {
         int curr;
         int free;
@@ -207,6 +210,7 @@ class PriorityQHeap extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqHeapExtractMin */
+    @Override
     Object pqExtractMin() {
         jogamp.opengl.glu.tessellator.PriorityQ.PQnode[] n = nodes;
         jogamp.opengl.glu.tessellator.PriorityQ.PQhandleElem[] h = handles;
@@ -229,6 +233,7 @@ class PriorityQHeap extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqHeapDelete */
+    @Override
     void pqDelete(int hCurr) {
         jogamp.opengl.glu.tessellator.PriorityQ.PQnode[] n = nodes;
         jogamp.opengl.glu.tessellator.PriorityQ.PQhandleElem[] h = handles;
@@ -252,10 +257,12 @@ class PriorityQHeap extends jogamp.opengl.glu.tessellator.PriorityQ {
         freeList = hCurr;
     }
 
+    @Override
     Object pqMinimum() {
         return handles[nodes[1].handle].key;
     }
 
+    @Override
     boolean pqIsEmpty() {
         return size == 0;
     }
diff --git a/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQSort.java b/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQSort.java
index f9e0225e3..cf54b15c3 100644
--- a/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQSort.java
+++ b/src/jogl/classes/jogamp/opengl/glu/tessellator/PriorityQSort.java
@@ -71,6 +71,7 @@ class PriorityQSort extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqSortDeletePriorityQ */
+    @Override
     void pqDeletePriorityQ() {
         if (heap != null) heap.pqDeletePriorityQ();
         order = null;
@@ -100,6 +101,7 @@ class PriorityQSort extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqSortInit */
+    @Override
     boolean pqInit() {
         int p, r, i, j;
         int piv;
@@ -191,6 +193,7 @@ class PriorityQSort extends jogamp.opengl.glu.tessellator.PriorityQ {
 
 /* really __gl_pqSortInsert */
 /* returns LONG_MAX iff out of memory */
+    @Override
     int pqInsert(Object keyNew) {
         int curr;
 
@@ -220,6 +223,7 @@ class PriorityQSort extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqSortExtractMin */
+    @Override
     Object pqExtractMin() {
         Object sortMin, heapMin;
 
@@ -240,6 +244,7 @@ class PriorityQSort extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqSortMinimum */
+    @Override
     Object pqMinimum() {
         Object sortMin, heapMin;
 
@@ -257,11 +262,13 @@ class PriorityQSort extends jogamp.opengl.glu.tessellator.PriorityQ {
     }
 
 /* really __gl_pqSortIsEmpty */
+    @Override
     boolean pqIsEmpty() {
         return (size == 0) && heap.pqIsEmpty();
     }
 
 /* really __gl_pqSortDelete */
+    @Override
     void pqDelete(int curr) {
         if (curr >= 0) {
             heap.pqDelete(curr);
diff --git a/src/jogl/classes/jogamp/opengl/glu/tessellator/Render.java b/src/jogl/classes/jogamp/opengl/glu/tessellator/Render.java
index 1801e1c59..a2e973508 100644
--- a/src/jogl/classes/jogamp/opengl/glu/tessellator/Render.java
+++ b/src/jogl/classes/jogamp/opengl/glu/tessellator/Render.java
@@ -279,6 +279,7 @@ class Render {
     }
 
     private static class RenderTriangle implements renderCallBack {
+        @Override
         public void render(GLUtessellatorImpl tess, jogamp.opengl.glu.tessellator.GLUhalfEdge e, long size) {
             /* Just add the triangle to a triangle list, so we can render all
              * the separate triangles at once.
@@ -323,6 +324,7 @@ class Render {
     }
 
     private static class RenderFan implements renderCallBack {
+        @Override
         public void render(GLUtessellatorImpl tess, jogamp.opengl.glu.tessellator.GLUhalfEdge e, long size) {
             /* Render as many CCW triangles as possible in a fan starting from
              * edge "e".  The fan *should* contain exactly "size" triangles
@@ -345,6 +347,7 @@ class Render {
     }
 
     private static class RenderStrip implements renderCallBack {
+        @Override
         public void render(GLUtessellatorImpl tess, jogamp.opengl.glu.tessellator.GLUhalfEdge e, long size) {
             /* Render as many CCW triangles as possible in a strip starting from
              * edge "e".  The strip *should* contain exactly "size" triangles
diff --git a/src/jogl/classes/jogamp/opengl/glu/tessellator/Sweep.java b/src/jogl/classes/jogamp/opengl/glu/tessellator/Sweep.java
index b4a400c1c..d2c0db61e 100644
--- a/src/jogl/classes/jogamp/opengl/glu/tessellator/Sweep.java
+++ b/src/jogl/classes/jogamp/opengl/glu/tessellator/Sweep.java
@@ -742,7 +742,7 @@ class Sweep {
         eUp.Org.s = isect.s;
         eUp.Org.t = isect.t;
         eUp.Org.pqHandle = tess.pq.pqInsert(eUp.Org); /* __gl_pqSortInsert */
-        if (eUp.Org.pqHandle == Long.MAX_VALUE) {
+        if (eUp.Org.pqHandle == Integer.MAX_VALUE) {
             tess.pq.pqDeletePriorityQ();    /* __gl_pqSortDeletePriorityQ */
             tess.pq = null;
             throw new RuntimeException();
@@ -1150,6 +1150,7 @@ class Sweep {
  */ {
         /* __gl_dictListNewDict */
         tess.dict = Dict.dictNewDict(tess, new Dict.DictLeq() {
+            @Override
             public boolean leq(Object frame, Object key1, Object key2) {
                 return EdgeLeq(tess, (ActiveRegion) key1, (ActiveRegion) key2);
             }
@@ -1231,6 +1232,7 @@ class Sweep {
 
         /* __gl_pqSortNewPriorityQ */
         pq = tess.pq = PriorityQ.pqNewPriorityQ(new PriorityQ.Leq() {
+            @Override
             public boolean leq(Object key1, Object key2) {
                 return Geom.VertLeq(((GLUvertex) key1), (GLUvertex) key2);
             }
@@ -1240,7 +1242,7 @@ class Sweep {
         vHead = tess.mesh.vHead;
         for (v = vHead.next; v != vHead; v = v.next) {
             v.pqHandle = pq.pqInsert(v); /* __gl_pqSortInsert */
-            if (v.pqHandle == Long.MAX_VALUE) break;
+            if (v.pqHandle == Integer.MAX_VALUE) break;
         }
         if (v != vHead || !pq.pqInit()) { /* __gl_pqSortInit */
             tess.pq.pqDeletePriorityQ();    /* __gl_pqSortDeletePriorityQ */
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
index 3cd4b340c..259c70641 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,6 +41,7 @@
 package jogamp.opengl.macosx.cgl;
 
 import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
 import java.util.Map;
 
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
@@ -48,110 +49,180 @@ import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.OffscreenLayerSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GL3ES3;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
+import javax.media.opengl.GLUniformData;
 
+import jogamp.nativewindow.macosx.OSXUtil;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLFBODrawableImpl;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.VersionNumber;
+import com.jogamp.common.util.locks.RecursiveLock;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLRendererQuirks;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.ShaderCode;
+import com.jogamp.opengl.util.glsl.ShaderProgram;
 
-public abstract class MacOSXCGLContext extends GLContextImpl
-{    
+public class MacOSXCGLContext extends GLContextImpl
+{
   // Abstract interface for implementation of this context (either
   // NSOpenGL-based or CGL-based)
   protected interface GLBackendImpl {
         boolean isNSContext();
         long create(long share, int ctp, int major, int minor);
         boolean destroy(long ctx);
+        void associateDrawable(boolean bound);
         boolean copyImpl(long src, int mask);
         boolean makeCurrent(long ctx);
         boolean release(long ctx);
+        boolean detachPBuffer();
         boolean setSwapInterval(int interval);
         boolean swapBuffers();
   }
-      
+
   /* package */ static final boolean isTigerOrLater;
   /* package */ static final boolean isLionOrLater;
+  /* package */ static final boolean isMavericksOrLater;
 
   static {
     final VersionNumber osvn = Platform.getOSVersionNumber();
-    isTigerOrLater = osvn.getMajor() > 10 || ( osvn.getMajor() == 10 && osvn.getMinor() >= 4 );
-    isLionOrLater  = osvn.getMajor() > 10 || ( osvn.getMajor() == 10 && osvn.getMinor() >= 7 );
+    isTigerOrLater = osvn.compareTo(Platform.OSXVersion.Tiger) >= 0;
+    isLionOrLater = osvn.compareTo(Platform.OSXVersion.Lion) >= 0;
+    isMavericksOrLater = osvn.compareTo(Platform.OSXVersion.Mavericks) >= 0;
   }
 
   static boolean isGLProfileSupported(int ctp, int major, int minor) {
     boolean ctBwdCompat = 0 != ( CTX_PROFILE_COMPAT & ctp ) ;
     boolean ctCore      = 0 != ( CTX_PROFILE_CORE & ctp ) ;
-    
+
     // We exclude 3.0, since we would map it's core to GL2. Hence we force mapping 2.1 to GL2
-    if(3==major && 1<=minor && minor<=2) {
-        // [3.1..3.2] -> GL3*
+    if( 3 < major || 3 == major && 1 <= minor ) {
+        if(ctBwdCompat || !ctCore) {
+            // No compatibility profile on OS X
+            // Only core is supported
+            return false;
+        }
         if(!isLionOrLater) {
-            // no GL3* on pre lion
+            // no GL Profile >= GL3 core on pre lion
             return false;
         }
-        if(ctBwdCompat) {
-            // no compatibility profile on OS X
+        if(3 < major && !isMavericksOrLater) {
+            // no GL Profile >= GL4 core on pre mavericks
             return false;
         }
-        return ctCore;
-    } else if(major<3) {
+        // [3.1..3.x] -> GL3
+        // [4.0..4.x] -> GL4
+        return true;
+    } else if( major < 3 ) {
         // < 3.0 -> GL2
         return true;
     }
     return false; // 3.0 && > 3.2
   }
-  static int GLProfile2CGLOGLProfileValue(int ctp, int major, int minor) {
+  static int GLProfile2CGLOGLProfileValue(AbstractGraphicsDevice device, int ctp, int major, int minor) {
     if(!MacOSXCGLContext.isGLProfileSupported(ctp, major, minor)) {
         throw new GLException("OpenGL profile not supported: "+getGLVersion(major, minor, ctp, "@GLProfile2CGLOGLProfileVersion"));
     }
-    boolean ctCore      = 0 != ( CTX_PROFILE_CORE & ctp ) ;
-    if( major == 3 && minor >= 1 && ctCore ) {
-        return CGL.kCGLOGLPVersion_3_2_Core;
+    final boolean ctCore = 0 != ( CTX_PROFILE_CORE & ctp ) ;
+
+    if( major == 4 && ctCore ) {
+        if( GLRendererQuirks.existStickyDeviceQuirk(device, GLRendererQuirks.GL4NeedsGL3Request) ) {
+            // Thread safe GLRendererQuirks sticky access, since we are only interested of the result _after_ GL version mapping,
+            // i.e. after single threaded initialization!
+            return CGL.kCGLOGLPVersion_GL3_Core;
+        } else {
+            return CGL.kCGLOGLPVersion_GL4_Core;
+        }
+    } else if( major == 3 && minor >= 1 && ctCore ) {
+        return CGL.kCGLOGLPVersion_GL3_Core;
     } else {
         return CGL.kCGLOGLPVersion_Legacy;
-    }        
-  }  
+    }
+  }
+
+  private static final String shaderBasename = "texture01_xxx";
+
+  private static ShaderProgram createCALayerShader(GL3ES3 gl) {
+      // Create & Link the shader program
+      final ShaderProgram sp = new ShaderProgram();
+      final ShaderCode vp = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, MacOSXCGLContext.class,
+                                              "../../shader", "../../shader/bin", shaderBasename, true);
+      final ShaderCode fp = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, MacOSXCGLContext.class,
+                                              "../../shader", "../../shader/bin", shaderBasename, true);
+      vp.defaultShaderCustomization(gl, true, true);
+      fp.defaultShaderCustomization(gl, true, true);
+      sp.add(vp);
+      sp.add(fp);
+      if(!sp.link(gl, System.err)) {
+          throw new GLException("Couldn't link program: "+sp);
+      }
+      sp.useProgram(gl, true);
+
+      // setup mgl_PMVMatrix
+      final PMVMatrix pmvMatrix = new PMVMatrix();
+      pmvMatrix.glMatrixMode(PMVMatrix.GL_PROJECTION);
+      pmvMatrix.glLoadIdentity();
+      pmvMatrix.glMatrixMode(PMVMatrix.GL_MODELVIEW);
+      pmvMatrix.glLoadIdentity();
+      final GLUniformData pmvMatrixUniform = new GLUniformData("mgl_PMVMatrix", 4, 4, pmvMatrix.glGetPMvMatrixf()); // P, Mv
+      pmvMatrixUniform.setLocation(gl, sp.program());
+      gl.glUniform(pmvMatrixUniform);
+
+      sp.useProgram(gl, false);
+      return sp;
+  }
+
 
   private boolean haveSetOpenGLMode = false;
   private GLBackendType openGLMode = GLBackendType.NSOPENGL;
-  
+
   // Implementation object (either NSOpenGL-based or CGL-based)
   protected GLBackendImpl impl;
-      
+
   private CGLExt _cglExt;
   // Table that holds the addresses of the native C-language entry points for
   // CGL extension functions.
   private CGLExtProcAddressTable cglExtProcAddressTable;
-  
+
+  private long updateHandle = 0;
+  private int lastWidth, lastHeight;
+
   protected MacOSXCGLContext(GLDrawableImpl drawable,
                    GLContext shareWith) {
     super(drawable, shareWith);
     initOpenGLImpl(getOpenGLMode());
   }
-  
+
   @Override
-  protected void resetStates() {
+  protected void resetStates(boolean isInit) {
     // no inner state _cglExt = null;
     cglExtProcAddressTable = null;
-    super.resetStates();
+    super.resetStates(isInit);
   }
 
+  @Override
   public Object getPlatformGLExtensions() {
     return getCGLExt();
   }
 
-  protected boolean isNSContext() { 
-      return (null != impl) ? impl.isNSContext() : this.openGLMode == GLBackendType.NSOPENGL; 
+  protected boolean isNSContext() {
+      return (null != impl) ? impl.isNSContext() : this.openGLMode == GLBackendType.NSOPENGL;
   }
 
   public CGLExt getCGLExt() {
@@ -161,6 +232,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return _cglExt;
   }
 
+  @Override
   public final ProcAddressTable getPlatformExtProcAddressTable() {
     return getCGLExtProcAddressTable();
   }
@@ -169,10 +241,13 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return cglExtProcAddressTable;
   }
 
+  @Override
   protected Map<String, String> getFunctionNameMap() { return null; }
 
+  @Override
   protected Map<String, String> getExtensionNameMap() { return null; }
 
+  @Override
   protected long createContextARBImpl(long share, boolean direct, int ctp, int major, int minor) {
     if(!isGLProfileSupported(ctp, major, minor)) {
         if(DEBUG) {
@@ -200,69 +275,130 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return ctx;
   }
 
+  @Override
   protected void destroyContextARBImpl(long _context) {
       impl.release(_context);
       impl.destroy(_context);
   }
 
+  @Override
   public final boolean isGLReadDrawableAvailable() {
     return false;
   }
 
-  protected long createImplPreset(GLContextImpl shareWith) throws GLException {
-    long share = 0;
-    if (shareWith != null) {
-      // Change our OpenGL mode to match that of any share context before we create ourselves
-      setOpenGLMode(((MacOSXCGLContext)shareWith).getOpenGLMode());
-      share = shareWith.getHandle();
-      if (share == 0) {
-        throw new GLException("GLContextShareSet returned a NULL OpenGL context");
-      }
-    }
-    
-    MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
-    GLCapabilitiesImmutable capabilitiesChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    if (capabilitiesChosen.getPbufferFloatingPointBuffers() && !isTigerOrLater) {
-       throw new GLException("Floating-point pbuffers supported only on OS X 10.4 or later");
-    }
-    GLProfile glp = capabilitiesChosen.getGLProfile();
-    if(glp.isGLES1() || glp.isGLES2() || glp.isGL4() || glp.isGL3() && !isLionOrLater) {
+  @Override
+  protected boolean createImpl(final long shareWithHandle) throws GLException {
+    final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
+    final GLCapabilitiesImmutable capabilitiesChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final GLProfile glp = capabilitiesChosen.getGLProfile();
+    if( glp.isGLES() ||
+        ( glp.isGL3() && !isLionOrLater ) || ( glp.isGL4() && !isMavericksOrLater ) ) {
         throw new GLException("OpenGL profile not supported on MacOSX "+Platform.getOSVersionNumber()+": "+glp);
     }
-    
-    if (DEBUG) {
-      System.err.println("Share context is " + toHexString(share) + " for " + this);
+    if( 0 != shareWithHandle && GLBackendType.NSOPENGL != getOpenGLMode() ) {
+        throw new GLException("Context sharing only supported in mode "+GLBackendType.NSOPENGL+": "+this);
     }
-    return share;      
-  }
-  
-  protected boolean createImpl(GLContextImpl shareWith) throws GLException {
-    long share = createImplPreset(shareWith);
-    contextHandle = createContextARB(share, true);
+    contextHandle = createContextARB(shareWithHandle, true);
     return 0 != contextHandle;
   }
-  
+
+  @Override
   protected void makeCurrentImpl() throws GLException {
+    /** FIXME: won't work w/ special drawables (like FBO) - check for CGL mode regressions!
+     *
     if (getOpenGLMode() != ((MacOSXCGLDrawable)drawable).getOpenGLMode()) {
       setOpenGLMode(((MacOSXCGLDrawable)drawable).getOpenGLMode());
-    }
+    } */
     if (!impl.makeCurrent(contextHandle)) {
       throw new GLException("Error making Context current: "+this);
-    }      
+    }
+    drawableUpdatedNotify();
   }
-    
+
+  @Override
   protected void releaseImpl() throws GLException {
     if (!impl.release(contextHandle)) {
       throw new GLException("Error releasing OpenGL Context: "+this);
     }
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
+    releaseUpdateHandle();
     if(!impl.destroy(contextHandle)) {
         throw new GLException("Error destroying OpenGL Context: "+this);
     }
   }
 
+  private final long getUpdateHandle() {
+    if( 0 == updateHandle ) {
+        lastWidth = -1;
+        lastHeight = -1;
+        if( isCreated() && drawable.getChosenGLCapabilities().isOnscreen() && isNSContext() ) {
+            final boolean incompleteView;
+            final NativeSurface surface = drawable.getNativeSurface();
+            if( surface instanceof ProxySurface ) {
+              incompleteView = ((ProxySurface)surface).containsUpstreamOptionBits( ProxySurface.OPT_UPSTREAM_WINDOW_INVISIBLE );
+            } else {
+              incompleteView = false;
+            }
+            if(!incompleteView) {
+                updateHandle = CGL.updateContextRegister(contextHandle, drawable.getHandle());
+                if(0 == updateHandle) {
+                    throw new InternalError("XXX2");
+                }
+            }
+        }
+    }
+    return updateHandle;
+  }
+
+  private final void releaseUpdateHandle() {
+    if ( 0 != updateHandle ) {
+        CGL.updateContextUnregister(updateHandle);
+        updateHandle = 0;
+    }
+  }
+
+  @Override
+  protected void drawableUpdatedNotify() throws GLException {
+    if( drawable.getChosenGLCapabilities().isOnscreen() ) {
+        final long _updateHandle = getUpdateHandle();
+        final int w = drawable.getWidth();
+        final int h = drawable.getHeight();
+        final boolean updateContext = ( 0!=_updateHandle && CGL.updateContextNeedsUpdate(_updateHandle) ) ||
+                                      w != lastWidth || h != lastHeight;
+        if(updateContext) {
+            lastWidth = w;
+            lastHeight = h;
+            if (contextHandle == 0) {
+              throw new GLException("Context not created");
+            }
+            CGL.updateContext(contextHandle);
+        }
+    }
+  }
+
+  @Override
+  protected void associateDrawable(boolean bound) {
+      // context stuff depends on drawable stuff
+      if(bound) {
+          super.associateDrawable(true);   // 1) init drawable stuff
+          impl.associateDrawable(true);    // 2) init context stuff
+          getUpdateHandle();
+      } else {
+          releaseUpdateHandle();
+          impl.associateDrawable(false);   // 1) free context stuff
+          super.associateDrawable(false);  // 2) free drawable stuff
+      }
+  }
+
+  /* pp */ void detachPBuffer() {
+      impl.detachPBuffer();
+  }
+
+
+  @Override
   protected void copyImpl(GLContext source, int mask) throws GLException {
     if( isNSContext() != ((MacOSXCGLContext)source).isNSContext() ) {
         throw new GLException("Source/Destination OpenGL Context tyoe mismatch: source "+source+", dest: "+this);
@@ -275,7 +411,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
   protected void swapBuffers() {
     // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
     if(!impl.swapBuffers()) {
-        throw new GLException("Error swapping buffers: "+this);        
+        throw new GLException("Error swapping buffers: "+this);
     }
   }
 
@@ -284,11 +420,19 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return impl.setSwapInterval(interval);
   }
 
-  public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
+  @Override
+  public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {
+    // FIXME: apparently the Apple extension doesn't require a custom memory allocator
+    throw new GLException("Not yet implemented");
+  }
+
+  @Override
+  public final void glFreeMemoryNV(ByteBuffer pointer) {
     // FIXME: apparently the Apple extension doesn't require a custom memory allocator
     throw new GLException("Not yet implemented");
   }
 
+  @Override
   protected final void updateGLXProcAddressTable() {
     final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
     final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
@@ -316,39 +460,12 @@ public abstract class MacOSXCGLContext extends GLContextImpl
         }
     }
   }
-    
+
+  @Override
   protected final StringBuilder getPlatformExtensionsStringImpl() {
     return new StringBuilder();
   }
-    
-  public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals("GL_ARB_pbuffer") ||
-        glExtensionName.equals("GL_ARB_pixel_format")) {
-      return true;
-    }
-    return super.isExtensionAvailable(glExtensionName);
-  }
-  
-  public int getOffscreenContextPixelDataType() {
-    throw new GLException("Should not call this");
-  }
-
-  public int getOffscreenContextReadBuffer() {
-    throw new GLException("Should not call this");
-  }
 
-  public boolean offscreenImageNeedsVerticalFlip() {
-    throw new GLException("Should not call this");
-  }
-
-  public void bindPbufferToTexture() {
-    throw new GLException("Should not call this");
-  }
-    
-  public void releasePbufferFromTexture() {
-    throw new GLException("Should not call this");
-  }
-    
   // Support for "mode switching" as described in MacOSXCGLDrawable
   public void setOpenGLMode(GLBackendType mode) {
       if (mode == openGLMode) {
@@ -364,10 +481,10 @@ public abstract class MacOSXCGLContext extends GLContextImpl
       }
       initOpenGLImpl(mode);
       openGLMode = mode;
-      haveSetOpenGLMode = true;      
+      haveSetOpenGLMode = true;
   }
   public final GLBackendType getOpenGLMode() { return openGLMode; }
-  
+
   protected void initOpenGLImpl(GLBackendType backend) {
     switch (backend) {
       case NSOPENGL:
@@ -379,8 +496,9 @@ public abstract class MacOSXCGLContext extends GLContextImpl
       default:
         throw new InternalError("Illegal implementation mode " + backend);
     }
-  }  
-  
+  }
+
+  @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append(getClass().getSimpleName());
@@ -391,291 +509,736 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     sb.append("] ");
     return sb.toString();
   }
-  
+
   // NSOpenGLContext-based implementation
   class NSOpenGLImpl implements GLBackendImpl {
-    long nsOpenGLLayer = 0;
-    long nsOpenGLLayerPFmt = 0;
-    float screenVSyncTimeout; // microSec
-    int vsyncTimeout;    // microSec - for nsOpenGLLayer mode
-    
-    public boolean isNSContext() { return true; }
-
-    public long create(long share, int ctp, int major, int minor) {        
-        long ctx = 0;
-        final MacOSXCGLDrawable drawable = (MacOSXCGLDrawable) MacOSXCGLContext.this.drawable;
-        final NativeSurface surface = drawable.getNativeSurface();
-        final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) surface.getGraphicsConfiguration();
-        final OffscreenLayerSurface backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(surface, true);        
-        final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-        long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(chosenCaps, ctp, major, minor);
-        if (pixelFormat == 0) {
+      private OffscreenLayerSurface backingLayerHost = null;
+      /** lifecycle:  [create - destroy] */
+      private long pixelFormat = 0;
+      /** microSec - defaults to 1/60s */
+      private int screenVSyncTimeout = 16666;
+      /** microSec - for nsOpenGLLayer mode - defaults to 1/60s + 1ms */
+      private volatile int vsyncTimeout = 16666 + 1000;
+      private int lastWidth=0, lastHeight=0; // allowing to detect size change
+      private boolean needsSetContextPBuffer = false;
+      private ShaderProgram gl3ShaderProgram = null;
+
+      @Override
+      public boolean isNSContext() { return true; }
+
+
+      /** Only returns a valid NSView. If !NSView, return null and mark either pbuffer and FBO. */
+      private long getNSViewHandle(boolean[] isPBuffer, boolean[] isFBO) {
+          final long nsViewHandle;
+          if(drawable instanceof GLFBODrawableImpl) {
+              nsViewHandle = 0;
+              isPBuffer[0] = false;
+              isFBO[0] = true;
+              if(DEBUG) {
+                  System.err.println("NS viewHandle.1: GLFBODrawableImpl drawable: isFBO "+isFBO+", isPBuffer "+isPBuffer+", "+drawable.getClass().getName()+",\n\t"+drawable);
+              }
+          } else {
+              final long drawableHandle = drawable.getHandle();
+              final boolean isNSView = OSXUtil.isNSView(drawableHandle);
+              final boolean isNSWindow = OSXUtil.isNSWindow(drawableHandle);
+              isPBuffer[0] = CGL.isNSOpenGLPixelBuffer(drawableHandle);
+              isFBO[0] = false;
+
+              if( isNSView ) {
+                  nsViewHandle = drawableHandle;
+              } else if( isNSWindow ) {
+                  nsViewHandle = OSXUtil.GetNSView(drawableHandle);
+              } else if( isPBuffer[0] ) {
+                  nsViewHandle = 0;
+              } else {
+                  throw new RuntimeException("Drawable's handle neither NSView, NSWindow nor PBuffer: drawableHandle "+toHexString(drawableHandle)+", isNSView "+isNSView+", isNSWindow "+isNSWindow+", isFBO "+isFBO[0]+", isPBuffer "+isPBuffer[0]+", "+drawable.getClass().getName()+",\n\t"+drawable);
+              }
+              if(DEBUG) {
+                  System.err.println("NS viewHandle.2: drawableHandle "+toHexString(drawableHandle)+" -> nsViewHandle "+toHexString(nsViewHandle)+": isNSView "+isNSView+", isNSWindow "+isNSWindow+", isFBO "+isFBO[0]+", isPBuffer "+isPBuffer[0]+", "+drawable.getClass().getName()+",\n\t"+drawable);
+              }
+          }
+          needsSetContextPBuffer = isPBuffer[0];
+          return nsViewHandle;
+      }
+
+      @Override
+      public long create(long share, int ctp, int major, int minor) {
+          long ctx = 0;
+          final NativeSurface surface = drawable.getNativeSurface();
+          final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) surface.getGraphicsConfiguration();
+          final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+          final long nsViewHandle;
+          final boolean isPBuffer;
+          final boolean isFBO;
+          {
+              boolean[] _isPBuffer = { false };
+              boolean[] _isFBO = { false };
+              nsViewHandle = getNSViewHandle(_isPBuffer, _isFBO);
+              isPBuffer = _isPBuffer[0];
+              isFBO = _isFBO[0];
+          }
+          final OffscreenLayerSurface backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
+
+          boolean incompleteView = null != backingLayerHost;
+          if( !incompleteView && surface instanceof ProxySurface ) {
+              incompleteView = ((ProxySurface)surface).containsUpstreamOptionBits( ProxySurface.OPT_UPSTREAM_WINDOW_INVISIBLE );
+          }
+          {
+              final GLCapabilitiesImmutable targetCaps;
+              if( isFBO ) {
+                  // Use minimum GLCapabilities for the target surface w/ same profile
+                  targetCaps = new GLCapabilities( chosenCaps.getGLProfile() );
+              } else {
+                  targetCaps = chosenCaps;
+              }
+              pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(config.getScreen().getDevice(), targetCaps, ctp, major, minor);
+          }
+          if (pixelFormat == 0) {
+              if(DEBUG) {
+                  System.err.println("Unable to allocate pixel format with requested GLCapabilities: "+chosenCaps);
+              }
+              return 0;
+          }
+          final GLCapabilitiesImmutable fixedCaps;
+          if( isFBO ) {
+              // pixelformat of target doesn't affect caps w/ FBO
+              fixedCaps = chosenCaps;
+          } else {
+              final GLCapabilities _fixedCaps = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(chosenCaps.getGLProfile(), pixelFormat);
+              if( !_fixedCaps.isPBuffer() && isPBuffer ) {
+                  throw new InternalError("handle is PBuffer, fixedCaps not: "+drawable);
+              }
+              // determine on-/offscreen caps, since pformat is ambiguous
+              _fixedCaps.setPBuffer( isPBuffer ); // exclusive
+              _fixedCaps.setBitmap( false );      // n/a in our OSX impl.
+              _fixedCaps.setOnscreen( !isFBO && !isPBuffer );
+              fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(_fixedCaps, chosenCaps.isBackgroundOpaque());
+          }
+          final int sRefreshRate = OSXUtil.GetScreenRefreshRate(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getIndex());
+          if( 0 < sRefreshRate ) {
+              screenVSyncTimeout = 1000000 / sRefreshRate;
+          }
           if(DEBUG) {
-                System.err.println("Unable to allocate pixel format with requested GLCapabilities: "+chosenCaps);
+              System.err.println("NS create OSX>=lion "+isLionOrLater+", OSX>=mavericks "+isMavericksOrLater);
+              System.err.println("NS create incompleteView: "+incompleteView);
+              System.err.println("NS create backingLayerHost: "+backingLayerHost);
+              System.err.println("NS create share: "+share);
+              System.err.println("NS create drawable type: "+drawable.getClass().getName());
+              System.err.println("NS create drawable handle: isPBuffer "+isPBuffer+", isFBO "+isFBO);
+              System.err.println("NS create pixelFormat: "+toHexString(pixelFormat));
+              System.err.println("NS create chosenCaps: "+chosenCaps);
+              System.err.println("NS create fixedCaps: "+fixedCaps);
+              System.err.println("NS create drawable native-handle: "+toHexString(drawable.getHandle()));
+              System.err.println("NS create drawable NSView-handle: "+toHexString(nsViewHandle));
+              System.err.println("NS create screen refresh-rate: "+sRefreshRate+" hz, "+screenVSyncTimeout+" micros");
+              // Thread.dumpStack();
           }
-          return 0;
-        }
-        config.setChosenPixelFormat(pixelFormat);
-        int sRefreshRate = CGL.getScreenRefreshRate(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getIndex());
-        screenVSyncTimeout = 1000000f / (float)sRefreshRate;
-        if(DEBUG) {
-            System.err.println("NS create OSX>=lion "+isLionOrLater);
-            System.err.println("NS create backendType: "+drawable.getOpenGLMode());
-            System.err.println("NS create backingLayerHost: "+backingLayerHost);
-            System.err.println("NS create share: "+share);
-            System.err.println("NS create chosenCaps: "+chosenCaps);
-            System.err.println("NS create pixelFormat: "+toHexString(pixelFormat));
-            System.err.println("NS create drawable native-handle: "+toHexString(drawable.getHandle()));
-            System.err.println("NS create drawable NSView-handle: "+toHexString(drawable.getNSViewHandle()));
-            System.err.println("NS create screen refresh-rate: "+sRefreshRate+" hz, "+screenVSyncTimeout+" micros");
-            // Thread.dumpStack();
-        }
-        try {
-          int[] viewNotReady = new int[1];
+          config.setChosenCapabilities(fixedCaps);
+
+          final IntBuffer viewNotReady = Buffers.newDirectIntBuffer(1);
           // Try to allocate a context with this
-          ctx = CGL.createContext(share,
-                                  drawable.getNSViewHandle(), null!=backingLayerHost,
-                                  pixelFormat,
-                                  chosenCaps.isBackgroundOpaque(),
-                                  viewNotReady, 0);
+          ctx = CGL.createContext(share, nsViewHandle, incompleteView,
+                  pixelFormat, chosenCaps.isBackgroundOpaque(), viewNotReady);
           if (0 == ctx) {
-            if(DEBUG) {
-                System.err.println("NS create failed: viewNotReady: "+ (1 == viewNotReady[0]));
-            }
-            return 0;
+              if(DEBUG) {
+                  System.err.println("NS create failed: viewNotReady: "+ (1 == viewNotReady.get(0)));
+              }
+              return 0;
           }
-    
-          if (!chosenCaps.isPBuffer() && !chosenCaps.isBackgroundOpaque()) {
+
+          if (chosenCaps.isOnscreen() && !chosenCaps.isBackgroundOpaque()) {
               // Set the context opacity
               CGL.setContextOpacity(ctx, 0);
           }
+          return ctx;
+      }
 
-          if(DEBUG) {
-              GLCapabilitiesImmutable caps0 = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(null, pixelFormat);
-              System.err.println("NS create pixelformat2GLCaps: "+caps0);
+      @Override
+      public boolean destroy(long ctx) {
+          if(0!=pixelFormat) {
+              CGL.deletePixelFormat(pixelFormat);
+              pixelFormat = 0;
           }
-          GLCapabilitiesImmutable fixedCaps = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(chosenCaps.getGLProfile(), pixelFormat);
-          fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(fixedCaps, chosenCaps.isBackgroundOpaque());
-          config.setChosenCapabilities(fixedCaps);          
-          if(DEBUG) {
-              System.err.println("NS create fixedCaps: "+fixedCaps);
+          return CGL.deleteContext(ctx, true);
+      }
+
+      /**
+       * NSOpenGLLayer creation and it's attachment is performed on the main-thread w/o [infinite] blocking.
+       * <p>
+       * Since NSOpenGLLayer creation requires this context for it's shared context creation,
+       * this method attempts to acquire the surface and context lock with {@link #screenVSyncTimeout}/2 maximum wait time.
+       * If the surface and context lock could not be acquired, this runnable is being re-queued for later execution.
+       * </p>
+       * <p>
+       * Hence this method blocks the main-thread only for a short period of time.
+       * </p>
+       */
+      class AttachGLLayerCmd implements Runnable {
+          final OffscreenLayerSurface ols;
+          final long ctx;
+          final int shaderProgram;
+          final long pfmt;
+          final long pbuffer;
+          final int texID;
+          final boolean isOpaque;
+          final int width;
+          final int height;
+          /** Synchronized by instance's monitor */
+          long nsOpenGLLayer;
+          /** Synchronized by instance's monitor */
+          boolean valid;
+
+          AttachGLLayerCmd(OffscreenLayerSurface ols, long ctx, int shaderProgram, long pfmt, long pbuffer, int texID, boolean isOpaque, int width, int height) {
+              this.ols = ols;
+              this.ctx = ctx;
+              this.shaderProgram = shaderProgram;
+              this.pfmt = pfmt;
+              this.pbuffer = pbuffer;
+              this.texID = texID;
+              this.isOpaque = isOpaque;
+              this.width = width;
+              this.height = height;
+              this.valid = false;
+              this.nsOpenGLLayer = 0;
           }
-          if(fixedCaps.isPBuffer()) {
-              // Must now associate the pbuffer with our newly-created context
-              CGL.setContextPBuffer(ctx, drawable.getHandle());
+
+          public final String contentToString() {
+              return "valid "+valid+", size "+width+"x"+height+", ctx "+toHexString(ctx)+", opaque "+isOpaque+", texID "+texID+", pbuffer "+toHexString(pbuffer)+", nsOpenGLLayer "+toHexString(nsOpenGLLayer);
           }
-          //
-          // handled layered surface
-          // 
-          if(null != backingLayerHost) {
-              nsOpenGLLayerPFmt = pixelFormat;
-              pixelFormat = 0;
-              final int texWidth, texHeight;
-              if(drawable instanceof MacOSXPbufferCGLDrawable) {
-                  final MacOSXPbufferCGLDrawable osxPDrawable = (MacOSXPbufferCGLDrawable)drawable;
-                  texWidth = osxPDrawable.getTextureWidth();
-                  texHeight = osxPDrawable.getTextureHeight();
-              } else {
-                  texWidth = drawable.getWidth();
-                  texHeight = drawable.getHeight();                  
-              }              
-              nsOpenGLLayer = CGL.createNSOpenGLLayer(ctx, nsOpenGLLayerPFmt, drawable.getHandle(), fixedCaps.isBackgroundOpaque(), texWidth, texHeight);
-              if(0>=texWidth || 0>=texHeight || !drawable.isRealized()) {
-                  throw new GLException("Drawable not realized yet or invalid texture size, texSize "+texWidth+"x"+texHeight+", "+drawable);
-              }
-              if (DEBUG) {
-                  System.err.println("NS create nsOpenGLLayer "+toHexString(nsOpenGLLayer)+", texSize "+texWidth+"x"+texHeight+", "+drawable);
-              }
-              backingLayerHost.attachSurfaceLayer(nsOpenGLLayer);
-              setSwapInterval(1); // enabled per default in layered surface
+
+          @Override
+          public final String toString() {
+              return "AttachGLLayerCmd["+contentToString()+"]";
           }
-        } finally {
-          if(0!=pixelFormat) {
-              CGL.deletePixelFormat(pixelFormat);
+
+          @Override
+          public void run() {
+              synchronized(this) {
+                  if( !valid ) {
+                      try {
+                          final int maxwait = screenVSyncTimeout/2000; // TO 1/2 of current screen-vsync in [ms]
+                          final RecursiveLock surfaceLock = ols.getLock();
+                          if( surfaceLock.tryLock( maxwait ) ) {
+                              try {
+                                  if( MacOSXCGLContext.this.lock.tryLock( maxwait ) ) {
+                                      try {
+                                          nsOpenGLLayer = CGL.createNSOpenGLLayer(ctx, shaderProgram, pfmt, pbuffer, texID, isOpaque, width, height);
+                                          ols.attachSurfaceLayer(nsOpenGLLayer);
+                                          final int currentInterval = MacOSXCGLContext.this.getSwapInterval();
+                                          final int interval = 0 <= currentInterval ? currentInterval : 1;
+                                          setSwapIntervalImpl(nsOpenGLLayer, interval); // enabled per default in layered surface
+                                          valid = true;
+                                          if (DEBUG) {
+                                              System.err.println("NSOpenGLLayer.Attach: OK, layer "+toHexString(nsOpenGLLayer)+" w/ pbuffer "+toHexString(pbuffer)+", texID "+texID+", texSize "+lastWidth+"x"+lastHeight+", drawableHandle "+toHexString(drawable.getHandle())+" - "+getThreadName());
+                                          }
+                                      } finally {
+                                          MacOSXCGLContext.this.lock.unlock();
+                                      }
+                                  }
+                              } finally {
+                                  surfaceLock.unlock();
+                              }
+                          }
+                      } catch (InterruptedException e) {
+                          e.printStackTrace();
+                      }
+                      if( !valid ) {
+                          // could not acquire lock, re-queue
+                          if (DEBUG) {
+                              System.err.println("NSOpenGLLayer.Attach: Re-Queue, drawableHandle "+toHexString(drawable.getHandle())+" - "+getThreadName());
+                          }
+                          OSXUtil.RunLater(true /* onMain */, this, 1);
+                      }
+                  }
+              }
           }
+      }
+      AttachGLLayerCmd attachGLLayerCmd = null;
+
+      class DetachGLLayerCmd implements Runnable {
+        final AttachGLLayerCmd cmd;
+
+        DetachGLLayerCmd(AttachGLLayerCmd cmd) {
+            this.cmd = cmd;
+        }
+
+        @Override
+        public final String toString() {
+            return "DetachGLLayerCmd["+cmd.contentToString()+"]";
+        }
+
+        @Override
+        public void run() {
+            synchronized( cmd ) {
+                if( cmd.valid ) {
+                    // still having a valid OLS attached to surface (parent OLS could have been removed)
+                    try {
+                        final OffscreenLayerSurface ols = cmd.ols;
+                        final long l = ols.getAttachedSurfaceLayer();
+                        if( 0 != l ) {
+                            ols.detachSurfaceLayer();
+                        }
+                    } catch(Throwable t) {
+                        System.err.println("Catched Exception on thread "+getThreadName());
+                        t.printStackTrace();
+                    }
+                    CGL.releaseNSOpenGLLayer(cmd.nsOpenGLLayer);
+                    if(DEBUG) {
+                        System.err.println("NSOpenGLLayer.Detach: OK, layer "+toHexString(cmd.nsOpenGLLayer)+" - "+getThreadName());
+                    }
+                    cmd.nsOpenGLLayer = 0;
+                    cmd.valid = false;
+                } else if(DEBUG) {
+                    System.err.println("NSOpenGLLayer.Detach: Skipped "+toHexString(cmd.nsOpenGLLayer)+" - "+getThreadName());
+                }
+            }
         }
-        return ctx;        
-    }
-    
-    public boolean destroy(long ctx) {
-      if(0 != nsOpenGLLayer) {
-          final NativeSurface surface = drawable.getNativeSurface();
-          if (DEBUG) {
-              System.err.println("NS destroy nsOpenGLLayer "+toHexString(nsOpenGLLayer));
-          }
-          final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
-          if(null == ols) {
-              throw new InternalError("XXX: "+ols);
-          }
-          CGL.releaseNSOpenGLLayer(nsOpenGLLayer);
-          ols.detachSurfaceLayer(nsOpenGLLayer);
-          CGL.deletePixelFormat(nsOpenGLLayerPFmt);
-          nsOpenGLLayerPFmt = 0;
-          nsOpenGLLayer = 0;
       }
-      return CGL.deleteContext(ctx, true);
-    }
 
-    public boolean copyImpl(long src, int mask) {
-        CGL.copyContext(contextHandle, src, mask);
-        return true;
-    }
-    
-    public boolean makeCurrent(long ctx) {
-      final long cglCtx = CGL.getCGLContext(ctx);
-      if(0 == cglCtx) {
-          throw new InternalError("Null CGLContext for: "+this);
+      @Override
+      public void associateDrawable(boolean bound) {
+          backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(drawable.getNativeSurface(), true);
+
+          if(DEBUG) {
+              System.err.println("MaxOSXCGLContext.NSOpenGLImpl.associateDrawable: "+bound+", ctx "+toHexString(contextHandle)+
+                                 ", hasBackingLayerHost "+(null!=backingLayerHost)+", attachGLLayerCmd "+attachGLLayerCmd);
+              // Thread.dumpStack();
+          }
+
+          if( bound ) {
+              if( null != backingLayerHost ) {
+                  final GLCapabilitiesImmutable chosenCaps;
+                  final long ctx;
+                  final int texID;
+                  final long pbufferHandle;
+                  final int gl3ShaderProgramName;
+
+                  //
+                  // handled layered surface
+                  //
+                  chosenCaps = drawable.getChosenGLCapabilities();
+                  ctx = MacOSXCGLContext.this.getHandle();
+                  final long drawableHandle = drawable.getHandle();
+                  if(drawable instanceof GLFBODrawableImpl) {
+                      final GLFBODrawableImpl fbod = (GLFBODrawableImpl)drawable;
+                      texID = fbod.getTextureBuffer(GL.GL_FRONT).getName();
+                      pbufferHandle = 0;
+                      fbod.setSwapBufferContext(new GLFBODrawableImpl.SwapBufferContext() {
+                          @Override
+                          public void swapBuffers(boolean doubleBuffered) {
+                              MacOSXCGLContext.NSOpenGLImpl.this.swapBuffers();
+                          } } ) ;
+                  } else if( CGL.isNSOpenGLPixelBuffer(drawableHandle) ) {
+                      texID = 0;
+                      pbufferHandle = drawableHandle;
+                      if(0 != drawableHandle) { // complete 'validatePBufferConfig(..)' procedure
+                          CGL.setContextPBuffer(ctx, pbufferHandle);
+                          needsSetContextPBuffer = false;
+                      }
+                  } else {
+                      throw new GLException("BackingLayerHost w/ unknown handle (!FBO, !PBuffer): "+drawable);
+                  }
+                  lastWidth = drawable.getWidth();
+                  lastHeight = drawable.getHeight();
+                  if(0>=lastWidth || 0>=lastHeight || !drawable.isRealized()) {
+                      throw new GLException("Drawable not realized yet or invalid texture size, texSize "+lastWidth+"x"+lastHeight+", "+drawable);
+                  }
+                  if( MacOSXCGLContext.this.isGL3core() ) {
+                      if( null == gl3ShaderProgram) {
+                          gl3ShaderProgram = createCALayerShader(MacOSXCGLContext.this.gl.getGL3ES3());
+                      }
+                      gl3ShaderProgramName = gl3ShaderProgram.program();
+                  } else {
+                      gl3ShaderProgramName = 0;
+                  }
+
+                  // All CALayer lifecycle ops are deferred on main-thread
+                  attachGLLayerCmd = new AttachGLLayerCmd(
+                          backingLayerHost, ctx, gl3ShaderProgramName, pixelFormat, pbufferHandle, texID,
+                          chosenCaps.isBackgroundOpaque(), lastWidth, lastHeight );
+                  if(DEBUG) {
+                      System.err.println("MaxOSXCGLContext.NSOpenGLImpl.associateDrawable(true): "+attachGLLayerCmd);
+                  }
+                  OSXUtil.RunOnMainThread(false, attachGLLayerCmd);
+              } else { // -> null == backingLayerHost
+                  lastWidth = drawable.getWidth();
+                  lastHeight = drawable.getHeight();
+                  boolean[] isPBuffer = { false };
+                  boolean[] isFBO = { false };
+                  CGL.setContextView(contextHandle, getNSViewHandle(isPBuffer, isFBO));
+              }
+          } else { // -> !bound
+              if( null != backingLayerHost ) {
+                  final AttachGLLayerCmd cmd = attachGLLayerCmd;
+                  attachGLLayerCmd = null;
+                  if( null == cmd ) {
+                      throw new GLException("Null attachGLLayerCmd: "+drawable);
+                  }
+                  if( 0 != cmd.pbuffer ) {
+                      CGL.setContextPBuffer(contextHandle, 0);
+                  }
+                  synchronized(cmd) {
+                      if( !cmd.valid ) {
+                          cmd.valid = true; // skip pending creation
+                      } else {
+                          // All CALayer lifecycle ops are deferred on main-thread
+                          final DetachGLLayerCmd dCmd = new DetachGLLayerCmd(cmd);
+                          if(DEBUG) {
+                              System.err.println("MaxOSXCGLContext.NSOpenGLImpl.associateDrawable(false): "+dCmd);
+                          }
+                          OSXUtil.RunOnMainThread(false, dCmd);
+                          if( null != gl3ShaderProgram ) {
+                              gl3ShaderProgram.destroy(MacOSXCGLContext.this.gl.getGL3());
+                              gl3ShaderProgram = null;
+                          }
+                      }
+                  }
+              }
+              CGL.clearDrawable(contextHandle);
+              backingLayerHost = null;
+          }
       }
-      int err = CGL.CGLLockContext(cglCtx);
-      if(CGL.kCGLNoError == err) {
-          return CGL.makeCurrentContext(ctx);
-      } else if(DEBUG) {
-          System.err.println("NSGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
+
+      private final void validatePBufferConfig(long ctx) {
+          final long drawableHandle = drawable.getHandle();
+          if( needsSetContextPBuffer && 0 != drawableHandle && CGL.isNSOpenGLPixelBuffer(drawableHandle) ) {
+              // Must associate the pbuffer with our newly-created context
+              needsSetContextPBuffer = false;
+              CGL.setContextPBuffer(ctx, drawableHandle);
+              if(DEBUG) {
+                  System.err.println("NS.validateDrawableConfig bind pbuffer "+toHexString(drawableHandle)+" -> ctx "+toHexString(ctx));
+              }
+          }
       }
-      return false;
-    }
 
-    public boolean release(long ctx) {
-      try {
-          gl.glFlush(); // w/o glFlush()/glFinish() OSX < 10.7 (NVidia driver) may freeze
-      } catch (GLException gle) {
-          if(DEBUG) {
-            System.err.println("MacOSXCGLContext.NSOpenGLImpl.release: INFO: glFlush() catched exception:");
-            gle.printStackTrace();              
+      /** Returns true if size has been updated, otherwise false (same size). */
+      private final boolean validateDrawableSizeConfig(long ctx) {
+          final int width = drawable.getWidth();
+          final int height = drawable.getHeight();
+          if( lastWidth != width || lastHeight != height ) {
+              lastWidth = drawable.getWidth();
+              lastHeight = drawable.getHeight();
+              if(DEBUG) {
+                  System.err.println("NS.validateDrawableConfig size changed");
+              }
+              return true;
           }
+          return false;
       }
-      final boolean res = CGL.clearCurrentContext(ctx);
-      final long cglCtx = CGL.getCGLContext(ctx);
-      if(0 == cglCtx) {
-          throw new InternalError("Null CGLContext for: "+this);
+
+      @Override
+      public boolean copyImpl(long src, int mask) {
+          CGL.copyContext(contextHandle, src, mask);
+          return true;
       }
-      final int err = CGL.CGLUnlockContext(cglCtx);
-      if(DEBUG && CGL.kCGLNoError != err) {
-          System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err)+": "+this);
-      }      
-      return res && CGL.kCGLNoError == err;
-    }
 
-    public boolean setSwapInterval(int interval) {
-      if(0 != nsOpenGLLayer) {
-        CGL.setNSOpenGLLayerSwapInterval(nsOpenGLLayer, interval);
-        vsyncTimeout = interval * (int)screenVSyncTimeout;
-        if(DEBUG) { System.err.println("NS setSwapInterval: "+vsyncTimeout+" micros"); }
+      @Override
+      public boolean makeCurrent(long ctx) {
+          final long cglCtx = CGL.getCGLContext(ctx);
+          if(0 == cglCtx) {
+              throw new InternalError("Null CGLContext for: "+this);
+          }
+          final int err = CGL.CGLLockContext(cglCtx);
+          if(CGL.kCGLNoError == err) {
+              validatePBufferConfig(ctx); // required to handle pbuffer change ASAP
+              return CGL.makeCurrentContext(ctx);
+          } else if(DEBUG) {
+              System.err.println("NSGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
+          }
+          return false;
       }
-      CGL.setSwapInterval(contextHandle, interval);
-      return true;
-    }
-    
-    public boolean swapBuffers() {
-      if( 0 != nsOpenGLLayer ) {
-        // If v-sync is disabled, frames will be drawn as quickly as possible 
-        // w/o delay but in sync w/ CALayer. Otherwise wait until next swap interval (v-sync).        
-        CGL.waitUntilNSOpenGLLayerIsReady(nsOpenGLLayer, vsyncTimeout);
+
+      @Override
+      public boolean release(long ctx) {
+          try {
+              if( hasRendererQuirk(GLRendererQuirks.GLFlushBeforeRelease) && null != MacOSXCGLContext.this.getGLProcAddressTable() ) {
+                  gl.glFlush();
+              }
+          } catch (GLException gle) {
+              if(DEBUG) {
+                  System.err.println("MacOSXCGLContext.NSOpenGLImpl.release: INFO: glFlush() catched exception:");
+                  gle.printStackTrace();
+              }
+          }
+          final boolean res = CGL.clearCurrentContext(ctx);
+          final long cglCtx = CGL.getCGLContext(ctx);
+          if(0 == cglCtx) {
+              throw new InternalError("Null CGLContext for: "+this);
+          }
+          final int err = CGL.CGLUnlockContext(cglCtx);
+          if(DEBUG && CGL.kCGLNoError != err) {
+              System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err)+": "+this);
+          }
+          return res && CGL.kCGLNoError == err;
+      }
+
+      @Override
+      public boolean detachPBuffer() {
+          needsSetContextPBuffer = true;
+          // CGL.setContextPBuffer(contextHandle, 0); // doesn't work, i.e. not taking nil
+          return true;
       }
-      if(CGL.flushBuffer(contextHandle)) {
-          if(0 != nsOpenGLLayer) {
-              // trigger CALayer to update
-              CGL.setNSOpenGLLayerNeedsDisplay(nsOpenGLLayer);
+
+      @Override
+      public boolean setSwapInterval(int interval) {
+          final AttachGLLayerCmd cmd = attachGLLayerCmd;
+          if(null != cmd) {
+              synchronized(cmd) {
+                  if( cmd.valid && 0 != cmd.nsOpenGLLayer) {
+                      setSwapIntervalImpl(cmd.nsOpenGLLayer, interval);
+                      return true;
+                  }
+              }
           }
+          setSwapIntervalImpl(0, interval);
           return true;
       }
-      return false;
-    }
+
+      private void setSwapIntervalImpl(final long l, int interval) {
+          if( 0 != l ) {
+              CGL.setNSOpenGLLayerSwapInterval(l, interval);
+              if( 0 < interval ) {
+                  vsyncTimeout = interval * screenVSyncTimeout + 1000; // +1ms
+              } else {
+                  vsyncTimeout = 1 * screenVSyncTimeout + 1000; // +1ms
+              }
+              if(DEBUG) { System.err.println("NS setSwapInterval: "+interval+" -> "+vsyncTimeout+" micros"); }
+          }
+          if(DEBUG) { System.err.println("CGL setSwapInterval: "+interval); }
+          CGL.setSwapInterval(contextHandle, interval);
+      }
+
+      private int skipSync=0;
+      /** TODO: Remove after discussion
+      private boolean perfIterReset = false;
+      private int perfIter = 0;
+      private long waitGLS = 0;
+      private long finishGLS = 0;
+      private long frameXS = 0;
+      private long lastFrameStart = 0;
+      */
+
+      @Override
+      public boolean swapBuffers() {
+          final AttachGLLayerCmd cmd = attachGLLayerCmd;
+          if(null != cmd) {
+              synchronized(cmd) {
+                  if( cmd.valid && 0 != cmd.nsOpenGLLayer) {
+                      if( validateDrawableSizeConfig(contextHandle) ) {
+                          // skip wait-for-vsync for a few frames if size has changed,
+                          // allowing to update the texture IDs ASAP.
+                          skipSync = 10;
+                      }
+
+                      final boolean res;
+                      final int texID;
+                      final boolean valid;
+                      final boolean isFBO = drawable instanceof GLFBODrawableImpl;
+                      if( isFBO ){
+                          texID = ((GLFBODrawableImpl)drawable).getTextureBuffer(GL.GL_FRONT).getName();
+                          valid = 0 != texID;
+                      } else {
+                          texID = 0;
+                          valid = 0 != drawable.getHandle();
+                      }
+                      if(valid) {
+                          res = CGL.flushBuffer(contextHandle);
+                          if(res) {
+                              if(0 == skipSync) {
+                                  /** TODO: Remove after discussion
+                                  perfIter++;
+                                  if( !perfIterReset && 100 == perfIter ) {
+                                      perfIterReset = true;
+                                      perfIter = 1;
+                                      waitGLS = 0;
+                                      finishGLS = 0;
+                                      frameXS = 0;
+                                  }
+                                  final long lastFramePeriod0 = TimeUnit.NANOSECONDS.toMicros(System.nanoTime()) - lastFrameStart;
+                                  gl.glFinish(); // Require to finish previous GL rendering to give CALayer proper result
+                                  final long lastFramePeriod1 = TimeUnit.NANOSECONDS.toMicros(System.nanoTime()) - lastFrameStart;
+
+                                  // If v-sync is disabled, frames will be drawn as quickly as possible w/o delay,
+                                  // while still synchronizing w/ CALayer.
+                                  // If v-sync is enabled wait until next swap interval (v-sync).
+                                  CGL.waitUntilNSOpenGLLayerIsReady(cmd.nsOpenGLLayer, vsyncTimeout);
+                                  final long lastFramePeriodX = TimeUnit.NANOSECONDS.toMicros(System.nanoTime()) - lastFrameStart;
+
+                                  final long finishGL = lastFramePeriod1 - lastFramePeriod0;
+                                  final long waitGL = lastFramePeriodX - lastFramePeriod1;
+                                  finishGLS += finishGL;
+                                  waitGLS += waitGL;
+                                  frameXS += lastFramePeriodX;
+
+                                  System.err.println("XXX["+perfIter+"] TO "+vsyncTimeout/1000+" ms, "+
+                                                     "lFrame0 "+lastFramePeriod0/1000+" ms, "+
+                                                     "lFrameX "+lastFramePeriodX/1000+" / "+frameXS/1000+" ~"+(frameXS/perfIter)/1000.0+" ms, "+
+                                                     "finishGL "+finishGL/1000+" / "+finishGLS/1000+" ~"+(finishGLS/perfIter)/1000.0+" ms, "+
+                                                     "waitGL "+waitGL/1000+" / "+waitGLS/1000+" ~"+(waitGLS/perfIter)/1000.0+" ms");
+                                  */
+                                  //
+                                  // Required(?) to finish previous GL rendering to give CALayer proper result,
+                                  // i.e. synchronize both threads each w/ their GLContext sharing same resources.
+                                  //
+                                  // FIXME: IMHO this synchronization should be implicitly performed via 'CGL.flushBuffer(contextHandle)' above,
+                                  // in case this will be determined a driver bug - use a QUIRK entry in GLRendererQuirks!
+                                  gl.glFinish();
+
+                                  // If v-sync is disabled, frames will be drawn as quickly as possible w/o delay,
+                                  // while still synchronizing w/ CALayer.
+                                  // If v-sync is enabled wait until next swap interval (v-sync).
+                                  CGL.waitUntilNSOpenGLLayerIsReady(cmd.nsOpenGLLayer, vsyncTimeout);
+                              } else {
+                                  skipSync--;
+                              }
+                              if(isFBO) {
+                                  // trigger CALayer to update incl. possible surface change (texture)
+                                  CGL.setNSOpenGLLayerNeedsDisplayFBO(cmd.nsOpenGLLayer, texID);
+                              } else {
+                                  // trigger CALayer to update incl. possible surface change (new pbuffer handle)
+                                  CGL.setNSOpenGLLayerNeedsDisplayPBuffer(cmd.nsOpenGLLayer, drawable.getHandle());
+                              }
+                              // lastFrameStart = TimeUnit.NANOSECONDS.toMicros(System.nanoTime());
+                          }
+                      } else {
+                          res = true;
+                      }
+                      return res;
+                  }
+              }
+          }
+          return CGL.flushBuffer(contextHandle);
+      }
+
   }
 
   class CGLImpl implements GLBackendImpl {
-    public boolean isNSContext() { return false; }
-    
-    public long create(long share, int ctp, int major, int minor) {
-      long ctx = 0;
-      MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
-      GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
-      long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2CGLPixelFormat(chosenCaps, ctp, major, minor);
-      if (pixelFormat == 0) {
-        throw new GLException("Unable to allocate pixel format with requested GLCapabilities");
-      }
-      config.setChosenPixelFormat(pixelFormat);
-      try {      
-          // Create new context
-          PointerBuffer ctxPB = PointerBuffer.allocateDirect(1);
-          if (DEBUG) {
-            System.err.println("Share context for CGL-based pbuffer context is " + toHexString(share));
-          }
-          int res = CGL.CGLCreateContext(pixelFormat, share, ctxPB);
-          if (res != CGL.kCGLNoError) {
-            throw new GLException("Error code " + res + " while creating context");
+      @Override
+      public boolean isNSContext() { return false; }
+
+      @Override
+      public long create(long share, int ctp, int major, int minor) {
+          long ctx = 0;
+          final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
+          final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
+          final long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2CGLPixelFormat(config.getScreen().getDevice(),
+                                                                      chosenCaps, ctp, major, minor);
+          if (pixelFormat == 0) {
+              throw new GLException("Unable to allocate pixel format with requested GLCapabilities");
           }
-          if(chosenCaps.isPBuffer()) {
-              // Attach newly-created context to the pbuffer
-              res = CGL.CGLSetPBuffer(ctxPB.get(0), drawable.getHandle(), 0, 0, 0);
+          try {
+              // Create new context
+              PointerBuffer ctxPB = PointerBuffer.allocateDirect(1);
+              if (DEBUG) {
+                  System.err.println("Share context for CGL-based pbuffer context is " + toHexString(share));
+              }
+              int res = CGL.CGLCreateContext(pixelFormat, share, ctxPB);
               if (res != CGL.kCGLNoError) {
-                throw new GLException("Error code " + res + " while attaching context to pbuffer");
+                  throw new GLException("Error code " + res + " while creating context");
               }
+              ctx = ctxPB.get(0);
+
+              if (0 != ctx) {
+                  GLCapabilities fixedCaps = MacOSXCGLGraphicsConfiguration.CGLPixelFormat2GLCapabilities(pixelFormat);
+                  fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(fixedCaps, chosenCaps.isBackgroundOpaque());
+                  { // determine on-/offscreen caps, since pformat is ambiguous
+                      fixedCaps.setFBO( false );         // n/a for CGLImpl
+                      fixedCaps.setPBuffer( fixedCaps.isPBuffer() && !chosenCaps.isOnscreen() );
+                      fixedCaps.setBitmap( false );      // n/a in our OSX impl.
+                      fixedCaps.setOnscreen( !fixedCaps.isPBuffer() );
+                  }
+                  config.setChosenCapabilities(fixedCaps);
+                  if(DEBUG) {
+                      System.err.println("CGL create fixedCaps: "+fixedCaps);
+                  }
+                  if(fixedCaps.isPBuffer()) {
+                      // Must now associate the pbuffer with our newly-created context
+                      res = CGL.CGLSetPBuffer(ctx, drawable.getHandle(), 0, 0, 0);
+                      if (res != CGL.kCGLNoError) {
+                          throw new GLException("Error code " + res + " while attaching context to pbuffer");
+                      }
+                  }
+              }
+          } finally {
+              CGL.CGLDestroyPixelFormat(pixelFormat);
           }
-          ctx = ctxPB.get(0);
-          if(0!=ctx) {
-              if(DEBUG) {
-                  GLCapabilitiesImmutable caps0 = MacOSXCGLGraphicsConfiguration.CGLPixelFormat2GLCapabilities(pixelFormat);
-                  System.err.println("NS created: "+caps0);
-              }              
-          }
-      } finally {
-          CGL.CGLDestroyPixelFormat(pixelFormat);          
+          return ctx;
       }
-      return ctx;
-    }
-    
-    public boolean destroy(long ctx) {
-      return CGL.CGLDestroyContext(ctx) == CGL.kCGLNoError;
-    }
 
-    public boolean copyImpl(long src, int mask) {
-        CGL.CGLCopyContext(src, contextHandle, mask);
-        return true;
-    }
-    
-    public boolean makeCurrent(long ctx) {
-      int err = CGL.CGLLockContext(ctx);
-      if(CGL.kCGLNoError == err) {
-          err = CGL.CGLSetCurrentContext(ctx);
+      @Override
+      public boolean destroy(long ctx) {
+          return CGL.CGLDestroyContext(ctx) == CGL.kCGLNoError;
+      }
+
+      @Override
+      public void associateDrawable(boolean bound) {
+      }
+
+      @Override
+      public boolean copyImpl(long src, int mask) {
+          CGL.CGLCopyContext(src, contextHandle, mask);
+          return true;
+      }
+
+      @Override
+      public boolean makeCurrent(long ctx) {
+          int err = CGL.CGLLockContext(ctx);
           if(CGL.kCGLNoError == err) {
-              return true;
+              err = CGL.CGLSetCurrentContext(ctx);
+              if(CGL.kCGLNoError == err) {
+                  return true;
+              } else if(DEBUG) {
+                  System.err.println("CGL: Could not make context current: err 0x"+Integer.toHexString(err)+": "+this);
+              }
           } else if(DEBUG) {
-              System.err.println("CGL: Could not make context current: err 0x"+Integer.toHexString(err)+": "+this);
+              System.err.println("CGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
           }
-      } else if(DEBUG) {
-          System.err.println("CGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
+          return false;
       }
-      return false;
-    }
 
-    public boolean release(long ctx) {
-      try {
-          gl.glFlush(); // w/o glFlush()/glFinish() OSX < 10.7 (NVidia driver) may freeze
-      } catch (GLException gle) {
-          if(DEBUG) {
-            System.err.println("MacOSXCGLContext.CGLImpl.release: INFO: glFlush() catched exception:");
-            gle.printStackTrace();              
+      @Override
+      public boolean release(long ctx) {
+          try {
+              if( hasRendererQuirk(GLRendererQuirks.GLFlushBeforeRelease) && null != MacOSXCGLContext.this.getGLProcAddressTable() ) {
+                  gl.glFlush();
+              }
+          } catch (GLException gle) {
+              if(DEBUG) {
+                  System.err.println("MacOSXCGLContext.CGLImpl.release: INFO: glFlush() catched exception:");
+                  gle.printStackTrace();
+              }
           }
+          int err = CGL.CGLSetCurrentContext(0);
+          if(DEBUG && CGL.kCGLNoError != err) {
+              System.err.println("CGL: Could not release current context: err 0x"+Integer.toHexString(err)+": "+this);
+          }
+          int err2 = CGL.CGLUnlockContext(ctx);
+          if(DEBUG && CGL.kCGLNoError != err2) {
+              System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err2)+": "+this);
+          }
+          return CGL.kCGLNoError == err && CGL.kCGLNoError == err2;
       }
-      int err = CGL.CGLSetCurrentContext(0);
-      if(DEBUG && CGL.kCGLNoError != err) {
-          System.err.println("CGL: Could not release current context: err 0x"+Integer.toHexString(err)+": "+this);
+
+      @Override
+      public boolean detachPBuffer() {
+          /* Doesn't work, i.e. not taking NULL
+          final int res = CGL.CGLSetPBuffer(contextHandle, 0, 0, 0, 0);
+          if (res != CGL.kCGLNoError) {
+              throw new GLException("Error code " + res + " while detaching context from pbuffer");
+          } */
+          return true;
       }
-      int err2 = CGL.CGLUnlockContext(ctx);
-      if(DEBUG && CGL.kCGLNoError != err2) {
-          System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err2)+": "+this);
+
+      @Override
+      public boolean setSwapInterval(int interval) {
+          final IntBuffer lval = Buffers.newDirectIntBuffer(1);
+          lval.put(0, interval);
+          CGL.CGLSetParameter(contextHandle, CGL.kCGLCPSwapInterval, lval);
+          return true;
       }
-      return CGL.kCGLNoError == err && CGL.kCGLNoError == err2;
-    }
-    
-    public boolean setSwapInterval(int interval) {
-        int[] lval = new int[] { interval } ;
-        CGL.CGLSetParameter(contextHandle, CGL.kCGLCPSwapInterval, lval, 0);
-        return true;
-    }    
-    public boolean swapBuffers() {
-        return CGL.kCGLNoError == CGL.CGLFlushDrawable(contextHandle);
-    }    
-  }  
+      @Override
+      public boolean swapBuffers() {
+          return CGL.kCGLNoError == CGL.CGLFlushDrawable(contextHandle);
+      }
+  }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
index 7b5efc31a..448e3e221 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -42,10 +42,10 @@ package jogamp.opengl.macosx.cgl;
 
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
 
 import javax.media.nativewindow.NativeSurface;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 
@@ -82,62 +82,75 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
   // lifetime of a given GLPbuffer. This is not a fully general
   // solution (for example, you can't share textures among a
   // GLPbuffer, a GLJPanel and a GLCanvas simultaneously) but should
-  // be enough to get things off the ground.  
+  // be enough to get things off the ground.
   public enum GLBackendType {
-    NSOPENGL(0), CGL(1); 
-    
+    /** Default OpenGL Backend */
+    NSOPENGL(0),
+    /** Alternative OpenGL Backend, only used for external context! */
+    CGL(1);
+
     public final int id;
 
     GLBackendType(int id){
         this.id = id;
     }
   }
-  private List<WeakReference<MacOSXCGLContext>> createdContexts = new ArrayList<WeakReference<MacOSXCGLContext>>();
-  
+  /* pp */ List<WeakReference<MacOSXCGLContext>> createdContexts = new ArrayList<WeakReference<MacOSXCGLContext>>();
+
   private boolean haveSetOpenGLMode = false;
   private GLBackendType openGLMode = GLBackendType.NSOPENGL;
-  
+
   public MacOSXCGLDrawable(GLDrawableFactory factory, NativeSurface comp, boolean realized) {
     super(factory, comp, realized);
     initOpenGLImpl(getOpenGLMode());
   }
-  
+
+  @Override
   protected void setRealizedImpl() {
   }
 
-  protected long getNSViewHandle() {
-      return GLBackendType.NSOPENGL == openGLMode ? getHandle() : 0;
-  }
-  
-  protected void registerContext(MacOSXCGLContext ctx) {
+  @Override
+  protected void associateContext(GLContext ctx, boolean bound) {
     // NOTE: we need to keep track of the created contexts in order to
     // implement swapBuffers() because of how Mac OS X implements its
     // OpenGL window interface
     synchronized (createdContexts) {
-      createdContexts.add(new WeakReference<MacOSXCGLContext>(ctx));
+        if(bound) {
+            final MacOSXCGLContext osxCtx = (MacOSXCGLContext)ctx;
+            createdContexts.add(new WeakReference<MacOSXCGLContext>(osxCtx));
+        } else {
+            for(int i=0; i<createdContexts.size(); ) {
+                final MacOSXCGLContext _ctx = createdContexts.get(i).get();
+                if( _ctx == null || _ctx == ctx) {
+                    createdContexts.remove(i);
+                } else {
+                    i++;
+                }
+            }
+        }
     }
   }
-  protected final void swapBuffersImpl() {
-    // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
-    synchronized (createdContexts) {
-        for (Iterator<WeakReference<MacOSXCGLContext>> iter = createdContexts.iterator(); iter.hasNext(); ) {
-          WeakReference<MacOSXCGLContext> ref = iter.next();
-          MacOSXCGLContext ctx = ref.get();
-          if (ctx != null) {
-            ctx.swapBuffers();
-          } else {
-            iter.remove();
-          }
+
+  @Override
+  protected final void swapBuffersImpl(boolean doubleBuffered) {
+    if(doubleBuffered) {
+        synchronized (createdContexts) {
+            for(int i=0; i<createdContexts.size(); ) {
+                final MacOSXCGLContext ctx = createdContexts.get(i).get();
+                if (ctx != null) {
+                    ctx.swapBuffers();
+                    i++;
+                } else {
+                    createdContexts.remove(i);
+                }
+            }
         }
     }
-  }  
-    
-  public GLDynamicLookupHelper getGLDynamicLookupHelper() {
-    return getFactoryImpl().getGLDynamicLookupHelper(0);
   }
 
-  protected static String getThreadName() {
-    return Thread.currentThread().getName();
+  @Override
+  public GLDynamicLookupHelper getGLDynamicLookupHelper() {
+    return getFactoryImpl().getGLDynamicLookupHelper(0);
   }
 
   // Support for "mode switching" as described in MacOSXCGLDrawable
@@ -148,17 +161,16 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
       if (haveSetOpenGLMode) {
         throw new GLException("Can't switch between using NSOpenGLPixelBuffer and CGLPBufferObj more than once");
       }
-    
-      destroyImpl();
+      setRealized(false);
       if (DEBUG) {
         System.err.println("MacOSXCGLDrawable: Switching context mode " + openGLMode + " -> " + mode);
       }
       initOpenGLImpl(mode);
       openGLMode = mode;
-      haveSetOpenGLMode = true;      
+      haveSetOpenGLMode = true;
   }
   public final GLBackendType getOpenGLMode() { return openGLMode; }
 
   protected void initOpenGLImpl(GLBackendType backend) { /* nop */ }
-  
+
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
index 71c0d5539..9ce71cfe9 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,17 +41,17 @@
 package jogamp.opengl.macosx.cgl;
 
 import java.nio.Buffer;
+import java.nio.FloatBuffer;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 
-import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.DefaultGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
@@ -60,21 +60,27 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
-import javax.media.opengl.GLProfile.ShutdownType;
 
+import jogamp.nativewindow.WrappedSurface;
+import jogamp.nativewindow.macosx.OSXDummyUpstreamSurfaceHook;
 import jogamp.opengl.DesktopGLDynamicLookupHelper;
+import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+import jogamp.opengl.SharedResourceRunner;
 
-import com.jogamp.common.JogampRuntimeException;
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.util.ReflectionUtil;
-import com.jogamp.nativewindow.WrappedSurface;
+import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 import com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice;
+import com.jogamp.opengl.GLExtensions;
+import com.jogamp.opengl.GLRendererQuirks;
 
 public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   private static DesktopGLDynamicLookupHelper macOSXCGLDynamicLookupHelper = null;
-  
+
   public MacOSXCGLDrawableFactory() {
     super();
 
@@ -90,31 +96,40 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
             }
             if(null!=tmp && tmp.isLibComplete()) {
                 macOSXCGLDynamicLookupHelper = tmp;
-                /** FIXME ?? 
+                /** FIXME ??
                 CGL.getCGLProcAddressTable().reset(macOSXCGLDynamicLookupHelper);
                 */
             }
         }
     }
-    
+
     defaultDevice = new MacOSXGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
-    
+
     if(null!=macOSXCGLDynamicLookupHelper) {
         // Register our GraphicsConfigurationFactory implementations
         // The act of constructing them causes them to be registered
         MacOSXCGLGraphicsConfigurationFactory.registerFactory();
         if(GLProfile.isAWTAvailable()) {
             try {
-              ReflectionUtil.callStaticMethod("jogamp.opengl.macosx.cgl.awt.MacOSXAWTCGLGraphicsConfigurationFactory", 
-                                              "registerFactory", null, null, getClass().getClassLoader());                
-            } catch (JogampRuntimeException jre) { /* n/a .. */ }
+              ReflectionUtil.callStaticMethod("jogamp.opengl.macosx.cgl.awt.MacOSXAWTCGLGraphicsConfigurationFactory",
+                                              "registerFactory", null, null, getClass().getClassLoader());
+            } catch (Exception jre) { /* n/a .. */ }
         }
-    
+
         sharedMap = new HashMap<String, SharedResource>();
-    }     
+    }
+  }
+
+  @Override
+  protected final boolean isComplete() {
+      return null != macOSXCGLDynamicLookupHelper;
   }
 
-  protected final void destroy(ShutdownType shutdownType) {
+  @Override
+  protected final void shutdownImpl() {
+    if( DEBUG ) {
+        System.err.println("MacOSXCGLDrawableFactory.shutdown");
+    }
     if(null != sharedMap) {
         sharedMap.clear();
         sharedMap = null;
@@ -122,13 +137,13 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     defaultDevice = null;
     /**
      * Pulling away the native library may cause havoc ..
-     * 
-    if(ShutdownType.COMPLETE == shutdownType && null != macOSXCGLDynamicLookupHelper) {
-        macOSXCGLDynamicLookupHelper.destroy();
-        macOSXCGLDynamicLookupHelper = null;
-    } */
+     *
+      macOSXCGLDynamicLookupHelper.destroy();
+     */
+    macOSXCGLDynamicLookupHelper = null;
   }
 
+  @Override
   public GLDynamicLookupHelper getGLDynamicLookupHelper(int profile) {
       return macOSXCGLDynamicLookupHelper;
   }
@@ -136,37 +151,62 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   private HashMap<String, SharedResource> sharedMap = new HashMap<String, SharedResource>();
   private MacOSXGraphicsDevice defaultDevice;
 
-  static class SharedResource {
+  static class SharedResource implements SharedResourceRunner.Resource {
       // private MacOSXCGLDrawable drawable;
       // private MacOSXCGLContext context;
+      private final GLRendererQuirks glRendererQuirks;
       MacOSXGraphicsDevice device;
-      boolean wasContextCreated;
+      boolean valid;
       boolean hasNPOTTextures;
       boolean hasRECTTextures;
       boolean hasAppleFloatPixels;
 
-      SharedResource(MacOSXGraphicsDevice device, boolean wasContextCreated, 
+      SharedResource(MacOSXGraphicsDevice device, boolean valid,
                      boolean hasNPOTTextures, boolean hasRECTTextures, boolean hasAppletFloatPixels
-                     /* MacOSXCGLDrawable draw, MacOSXCGLContext ctx */) {
+                     /* MacOSXCGLDrawable draw, MacOSXCGLContext ctx */, GLRendererQuirks glRendererQuirks) {
           // drawable = draw;
-          // context = ctx;
+          // this.context = ctx;
+          this.glRendererQuirks = glRendererQuirks;
           this.device = device;
-          this.wasContextCreated = wasContextCreated;
+          this.valid = valid;
           this.hasNPOTTextures = hasNPOTTextures;
           this.hasRECTTextures = hasRECTTextures;
           this.hasAppleFloatPixels = hasAppletFloatPixels;
       }
-      final MacOSXGraphicsDevice getDevice() { return device; }
-      final boolean wasContextAvailable() { return wasContextCreated; }
+      @Override
+      public final boolean isValid() {
+          return valid;
+      }
+      @Override
+      public final MacOSXGraphicsDevice getDevice() { return device; }
+      // final MacOSXCGLContext getContext() { return context; }
       final boolean isNPOTTextureAvailable() { return hasNPOTTextures; }
       final boolean isRECTTextureAvailable() { return hasRECTTextures; }
       final boolean isAppleFloatPixelsAvailable() { return hasAppleFloatPixels; }
+      @Override
+      public final AbstractGraphicsScreen getScreen() {
+          return null;
+      }
+      @Override
+      public final GLDrawableImpl getDrawable() {
+          return null;
+      }
+      @Override
+      public GLContextImpl getContext() {
+          return null;
+      }
+      @Override
+      public GLRendererQuirks getRendererQuirks() {
+          return glRendererQuirks;
+      }
   }
 
+  @Override
   public final AbstractGraphicsDevice getDefaultDevice() {
       return defaultDevice;
   }
 
+  @Override
   public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
       if(null!=macOSXCGLDynamicLookupHelper && device instanceof MacOSXGraphicsDevice) {
           return true;
@@ -174,7 +214,7 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
       return false;
   }
 
-  private HashSet<String> devicesTried = new HashSet<String>();
+  private final HashSet<String> devicesTried = new HashSet<String>();
 
   private boolean getDeviceTried(String connection) {
       synchronized (devicesTried) {
@@ -191,8 +231,9 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
           devicesTried.remove(connection);
       }
   }
-  
-  /* package */ SharedResource getOrCreateOSXSharedResource(AbstractGraphicsDevice adevice) {
+
+  @Override
+  protected final SharedResource getOrCreateSharedResourceImpl(AbstractGraphicsDevice adevice) {
     final String connection = adevice.getConnection();
     SharedResource sr;
     synchronized(sharedMap) {
@@ -201,7 +242,8 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     if(null==sr && !getDeviceTried(connection)) {
         addDeviceTried(connection);
         final MacOSXGraphicsDevice sharedDevice = new MacOSXGraphicsDevice(adevice.getUnitID());
-        boolean madeCurrent = false;
+        GLRendererQuirks glRendererQuirks = null;
+        boolean isValid = false;
         boolean hasNPOTTextures = false;
         boolean hasRECTTextures = false;
         boolean hasAppleFloatPixels = false;
@@ -209,96 +251,68 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
             GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
             if (null == glp) {
                 throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
-            }    
-            final GLCapabilities caps = new GLCapabilities(glp);
-            caps.setRedBits(5); caps.setGreenBits(5); caps.setBlueBits(5); caps.setAlphaBits(0);
-            caps.setDepthBits(5);
-            caps.setDoubleBuffered(false);
-            caps.setOnscreen(false);
-            caps.setPBuffer(true);
-            final MacOSXCGLDrawable drawable = (MacOSXCGLDrawable) createGLDrawable( createOffscreenSurfaceImpl(sharedDevice, caps, caps, null, 64, 64) );        
-            if(null!=drawable) {
-                drawable.setRealized(true);
-                final GLContext context = drawable.createContext(null);
-                if (null != context) {
-                    try {
-                        context.makeCurrent(); // could cause exception
-                        madeCurrent = context.isCurrent();
-                        if(madeCurrent) {
-                            GL gl = context.getGL();
-                            hasNPOTTextures = gl.isNPOTTextureAvailable();
-                            hasRECTTextures = gl.isExtensionAvailable("GL_EXT_texture_rectangle");
-                            hasAppleFloatPixels = gl.isExtensionAvailable("GL_APPLE_float_pixels");
-                        }
-                    } catch (GLException gle) {
-                        if (DEBUG) {
-                            System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: makeCurrent catched exception:");
-                            gle.printStackTrace();
-                        }
-                    } finally {
-                        try {
-                            context.destroy();
-                        } catch (GLException gle) {
-                            if (DEBUG) {
-                                System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: destroy catched exception:");
-                                gle.printStackTrace();
-                            }                            
-                        }
+            }
+            final GLCapabilitiesImmutable caps = new GLCapabilities(glp);
+            final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, caps, caps, null, 64, 64));
+            sharedDrawable.setRealized(true);
+
+            final MacOSXCGLContext sharedContext = (MacOSXCGLContext) sharedDrawable.createContext(null);
+            if (null == sharedContext) {
+                throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
+            }
+
+            try {
+                sharedContext.makeCurrent(); // could cause exception
+                isValid = sharedContext.isCurrent();
+                if(isValid) {
+                    GL gl = sharedContext.getGL();
+                    hasNPOTTextures = gl.isNPOTTextureAvailable();
+                    hasRECTTextures = gl.isExtensionAvailable(GLExtensions.EXT_texture_rectangle);
+                    hasAppleFloatPixels = gl.isExtensionAvailable(GLExtensions.APPLE_float_pixels);
+                    glRendererQuirks = sharedContext.getRendererQuirks();
+                }
+            } catch (GLException gle) {
+                if (DEBUG) {
+                    System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: makeCurrent catched exception:");
+                    gle.printStackTrace();
+                }
+            } finally {
+                try {
+                    sharedContext.destroy();
+                } catch (GLException gle) {
+                    if (DEBUG) {
+                        System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: destroy catched exception:");
+                        gle.printStackTrace();
                     }
                 }
-                drawable.destroy();
             }
+            sharedDrawable.setRealized(false);
         }
-        sr = new SharedResource(sharedDevice, madeCurrent, hasNPOTTextures, hasRECTTextures, hasAppleFloatPixels);
+        sr = new SharedResource(sharedDevice, isValid, hasNPOTTextures, hasRECTTextures, hasAppleFloatPixels, glRendererQuirks);
         synchronized(sharedMap) {
             sharedMap.put(connection, sr);
         }
         removeDeviceTried(connection);
         if (DEBUG) {
             System.err.println("MacOSXCGLDrawableFactory.createShared: device:  " + sharedDevice);
-            System.err.println("MacOSXCGLDrawableFactory.createShared: context: madeCurrent " + madeCurrent + ", NPOT "+hasNPOTTextures+
-                               ", RECT "+hasRECTTextures+", FloatPixels "+hasAppleFloatPixels);
-        }                        
+            System.err.println("MacOSXCGLDrawableFactory.createShared: context: madeCurrent " + isValid + ", NPOT "+hasNPOTTextures+
+                               ", RECT "+hasRECTTextures+", FloatPixels "+hasAppleFloatPixels+", "+glRendererQuirks);
+        }
     }
     return sr;
   }
-   
+
+  @Override
   protected final Thread getSharedResourceThread() {
     return null;
   }
-  
-  protected final boolean createSharedResource(AbstractGraphicsDevice device) {
-    try {
-        SharedResource sr = getOrCreateOSXSharedResource(device);
-        if(null!=sr) {
-            return sr.wasContextAvailable();
-        }
-    } catch (GLException gle) {
-        if(DEBUG) {
-            System.err.println("Catched Exception while MaxOSXCGL Shared Resource initialization:");
-            gle.printStackTrace();
-        }
-    }
-    return false;        
-  }
-  
-  protected final GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device) {
-      // FIXME: not implemented .. needs a dummy OSX surface
-      return null;
-  }
-
-  protected AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device) {
-      SharedResource sr = getOrCreateOSXSharedResource(device);
-      if(null!=sr) {
-          return sr.getDevice();
-      }
-      return null;
-  }
 
+  @Override
   protected List<GLCapabilitiesImmutable> getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
       return MacOSXCGLGraphicsConfiguration.getAvailableCapabilities(this, device);
   }
 
+  @Override
   protected GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
@@ -306,54 +320,81 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     return new MacOSXOnscreenCGLDrawable(this, target);
   }
 
+  @Override
   protected GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
-    AbstractGraphicsConfiguration config = target.getGraphicsConfiguration();
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final MutableGraphicsConfiguration config = (MutableGraphicsConfiguration) target.getGraphicsConfiguration();
+    final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
     if(!caps.isPBuffer()) {
+        // Actual implementation is using PBuffer ...
+        final GLCapabilities modCaps = (GLCapabilities) caps.cloneMutable();
+        modCaps.setPBuffer(true);
+        modCaps.setBitmap(false);
+        config.setChosenCapabilities(modCaps);
         return new MacOSXOffscreenCGLDrawable(this, target);
     }
     return new MacOSXPbufferCGLDrawable(this, target);
   }
 
-  public boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
-    return true;
+  @Override
+  public boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
+    if( glp.isGL2() ) {
+        // OSX only supports pbuffer w/ compatible, non-core, context.
+        return true;
+    } else {
+        return false;
+    }
+  }
+
+  @Override
+  protected ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                  GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
+                                                  GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook) {
+    final MacOSXGraphicsDevice device;
+    if( createNewDevice || !(deviceReq instanceof MacOSXGraphicsDevice) ) {
+        device = new MacOSXGraphicsDevice(deviceReq.getUnitID());
+    } else {
+        device = (MacOSXGraphicsDevice)deviceReq;
+    }
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+    final MacOSXCGLGraphicsConfiguration config = MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, true);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen);
+    }
+    return new WrappedSurface(config, 0, upstreamHook, createNewDevice);
+  }
+
+  @Override
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                   GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(chosenCaps);
+    return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser,
+                                    new OSXDummyUpstreamSurfaceHook(width, height));
   }
 
-  protected NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device,GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
-    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_MACOSX);
-    WrappedSurface ns = new WrappedSurface(MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, true));
-    ns.surfaceSizeChanged(width, height);
-    return ns;
+  @Override
+  protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final MacOSXGraphicsDevice device = new MacOSXGraphicsDevice(deviceReq.getUnitID());
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, screenIdx);
+    final MacOSXCGLGraphicsConfiguration config = MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, true);
+    return new WrappedSurface(config, windowHandle, upstream, true);
   }
 
-  protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-    AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);    
-    WrappedSurface ns = new WrappedSurface(MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, true), windowHandle);
-    return ns;    
-  }  
-  
+  @Override
   protected GLContext createExternalGLContextImpl() {
     return MacOSXExternalCGLContext.create(this);
   }
 
+  @Override
   public boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
     return false;
   }
 
+  @Override
   protected GLDrawable createExternalGLDrawableImpl() {
     // FIXME
     throw new GLException("Not yet implemented");
   }
 
-  public boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-    return false;
-  }
-
-  public GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException {
-    throw new GLException("not supported in non AWT enviroment");
-  }
-  
   //------------------------------------------------------
   // Gamma-related functionality
   //
@@ -362,21 +403,24 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
 
   /** Returns the length of the computed gamma ramp for this OS and
       hardware. Returns 0 if gamma changes are not supported. */
+  @Override
   protected int getGammaRampLength() {
     return GAMMA_RAMP_LENGTH;
   }
 
+  @Override
   protected boolean setGammaRamp(float[] ramp) {
-    return CGL.setGammaRamp(ramp.length,
-                            ramp, 0,
-                            ramp, 0,
-                            ramp, 0);
+    final FloatBuffer rampNIO = Buffers.newDirectFloatBuffer(ramp);
+
+    return CGL.setGammaRamp(ramp.length, rampNIO, rampNIO, rampNIO);
   }
 
+  @Override
   protected Buffer getGammaRamp() {
     return null;
   }
 
+  @Override
   protected void resetGammaRamp(Buffer originalGammaRamp) {
     CGL.resetGammaRamp();
   }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
index 03ec94db6..cda8307c7 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,35 +20,35 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.macosx.cgl;
 
 import jogamp.opengl.*;
 import java.util.*;
 
-public class MacOSXCGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
+public final class MacOSXCGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
     protected MacOSXCGLDynamicLibraryBundleInfo() {
         super();
     }
 
     @Override
-    public List<List<String>> getToolLibNames() {
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         final List<String> libsGL = new ArrayList<String>();
         libsGL.add("/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib");
         libsGL.add("GL");
-        libsList.add(libsGL);        
+        libsList.add(libsGL);
         return libsList;
     }
-    
+
     @Override
     public final List<String> getToolGetProcAddressFuncNameList() {
-        return null; 
+        return null;
         /** OSX manual says: NSImage use is discouraged
         List res = new ArrayList();
         res.add("GetProcAddress"); // dummy
@@ -59,7 +59,7 @@ public class MacOSXCGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBu
     public final long toolGetProcAddress(long toolGetProcAddressHandle, String funcName) {
         return 0;
         /** OSX manual says: NSImage use is discouraged
-            return CGL.getProcAddress(glFuncName); // manual implementation 
+            return CGL.getProcAddress(glFuncName); // manual implementation
          */
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
index 8393a688e..481c0b94b 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,13 +29,14 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.macosx.cgl;
 
+import java.nio.IntBuffer;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -46,40 +47,34 @@ import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 
 public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration implements Cloneable {
-    long pixelformat;
 
-    MacOSXCGLGraphicsConfiguration(AbstractGraphicsScreen screen, 
-                                   GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
-                                   long pixelformat) {
+    MacOSXCGLGraphicsConfiguration(AbstractGraphicsScreen screen,
+                                   GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested) {
         super(screen, capsChosen, capsRequested);
-        this.pixelformat=pixelformat;
     }
 
+    @Override
     public Object clone() {
         return super.clone();
     }
 
-    void setChosenPixelFormat(long pixelformat) {
-        this.pixelformat=pixelformat;
-    }
-
     protected static List<GLCapabilitiesImmutable> getAvailableCapabilities(MacOSXCGLDrawableFactory factory, AbstractGraphicsDevice device) {
-        MacOSXCGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateOSXSharedResource(device);
+        MacOSXCGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
         if(null == sharedResource) {
             throw new GLException("Shared resource for device n/a: "+device);
         }
         // MacOSXGraphicsDevice osxDevice = sharedResource.getDevice();
         return new ArrayList<GLCapabilitiesImmutable>(0);
     }
-    
-    static final int[] cglInternalAttributeToken = new int[] {
+
+    static final IntBuffer cglInternalAttributeToken = Buffers.newDirectIntBuffer(new int[] {
         CGL.kCGLPFAOpenGLProfile,    // >= lion
-        CGL.NSOpenGLPFAAccelerated,  // query only (prefer accelerated, but allow non accelerated), ignored for createPixelformat 
+        CGL.NSOpenGLPFAAccelerated,  // query only (prefer accelerated, but allow non accelerated), ignored for createPixelformat
         CGL.NSOpenGLPFANoRecovery,
         CGL.kCGLPFAColorFloat,
         CGL.NSOpenGLPFAPixelBuffer,
@@ -91,70 +86,66 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
         CGL.NSOpenGLPFAAccumSize,
         CGL.NSOpenGLPFAStencilSize,
         CGL.NSOpenGLPFASampleBuffers,
-        CGL.NSOpenGLPFASamples };
+        CGL.NSOpenGLPFASamples });
 
-    static int[] GLCapabilities2NSAttribList(GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
-        int len = cglInternalAttributeToken.length;
-        int off = 0;
-        if ( !MacOSXCGLContext.isLionOrLater ) {
-            // no OpenGLProfile
-            off++;
-            len--;
-        }        
-        int[] ivalues = new int[len];
+    static IntBuffer GLCapabilities2NSAttribList(AbstractGraphicsDevice device, IntBuffer attrToken, GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
+        final int len = attrToken.remaining();
+        final int off = attrToken.position();
+        final IntBuffer ivalues = Buffers.newDirectIntBuffer(len);
 
         for (int idx = 0; idx < len; idx++) {
-          final int attr = cglInternalAttributeToken[idx+off];
+          final int attr = attrToken.get(idx+off);
           switch (attr) {
-              case CGL.kCGLPFAOpenGLProfile: 
-                ivalues[idx] = MacOSXCGLContext.GLProfile2CGLOGLProfileValue(ctp, major, minor);
+              case CGL.kCGLPFAOpenGLProfile:
+                ivalues.put(idx, MacOSXCGLContext.GLProfile2CGLOGLProfileValue(device, ctp, major, minor));
                 break;
               case CGL.NSOpenGLPFANoRecovery:
-                ivalues[idx] = caps.getHardwareAccelerated() ? 1 : 0;
+                ivalues.put(idx, caps.getHardwareAccelerated() ? 1 : 0);
                 break;
-                  
+
               case CGL.kCGLPFAColorFloat:
-                ivalues[idx] = caps.getPbufferFloatingPointBuffers() ? 1 : 0;
+                // ivalues.put(idx, ( !caps.isOnscreen() && caps.isPBuffer() && caps.getPbufferFloatingPointBuffers() ) ? 1 : 0);
+                  ivalues.put(idx, 0);
                 break;
 
               case CGL.NSOpenGLPFAPixelBuffer:
-                ivalues[idx] = caps.isPBuffer() ? 1 : 0;
+                ivalues.put(idx, ( !caps.isOnscreen() && caps.isPBuffer() ) ? 1 : 0);
                 break;
 
               case CGL.NSOpenGLPFADoubleBuffer:
-                ivalues[idx] = (caps.getDoubleBuffered() ? 1 : 0);
+                ivalues.put(idx, (caps.getDoubleBuffered() ? 1 : 0));
                 break;
 
               case CGL.NSOpenGLPFAStereo:
-                ivalues[idx] = (caps.getStereo() ? 1 : 0);
+                ivalues.put(idx, (caps.getStereo() ? 1 : 0));
                 break;
 
               case CGL.NSOpenGLPFAColorSize:
-                ivalues[idx] = (caps.getRedBits() + caps.getGreenBits() + caps.getBlueBits());
+                ivalues.put(idx, (caps.getRedBits() + caps.getGreenBits() + caps.getBlueBits()));
                 break;
 
               case CGL.NSOpenGLPFAAlphaSize:
-                ivalues[idx] = caps.getAlphaBits();
+                ivalues.put(idx, caps.getAlphaBits());
                 break;
 
               case CGL.NSOpenGLPFADepthSize:
-                ivalues[idx] = caps.getDepthBits();
+                ivalues.put(idx, caps.getDepthBits());
                 break;
 
               case CGL.NSOpenGLPFAAccumSize:
-                ivalues[idx] = (caps.getAccumRedBits() + caps.getAccumGreenBits() + caps.getAccumBlueBits() + caps.getAccumAlphaBits());
+                ivalues.put(idx, (caps.getAccumRedBits() + caps.getAccumGreenBits() + caps.getAccumBlueBits() + caps.getAccumAlphaBits()));
                 break;
 
               case CGL.NSOpenGLPFAStencilSize:
-                ivalues[idx] = caps.getStencilBits();
+                ivalues.put(idx, caps.getStencilBits());
                 break;
 
               case CGL.NSOpenGLPFASampleBuffers:
-                ivalues[idx] = caps.getSampleBuffers() ? 1 : 0;
+                ivalues.put(idx, caps.getSampleBuffers() ? 1 : 0);
                 break;
 
               case CGL.NSOpenGLPFASamples:
-                ivalues[idx] = caps.getSampleBuffers() ? ivalues[idx] = caps.getNumSamples() : 0;
+                ivalues.put(idx, caps.getNumSamples());
                 break;
 
               default:
@@ -164,152 +155,158 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
         return ivalues;
     }
 
-    static long GLCapabilities2NSPixelFormat(GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
-        int len = cglInternalAttributeToken.length;
-        int off = 0;
+    static long GLCapabilities2NSPixelFormat(AbstractGraphicsDevice device, GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
+        final IntBuffer attrToken = cglInternalAttributeToken.duplicate();
         if ( !MacOSXCGLContext.isLionOrLater ) {
             // no OpenGLProfile
-            off++;
-            len--;
-        }        
-        int[] ivalues = GLCapabilities2NSAttribList(caps, ctp, major, minor);
-        return CGL.createPixelFormat(cglInternalAttributeToken, off, len, ivalues, 0);
+            attrToken.position(1);
+        }
+        final IntBuffer ivalues = GLCapabilities2NSAttribList(device, attrToken, caps, ctp, major, minor);
+        return CGL.createPixelFormat(attrToken, attrToken.remaining(), ivalues);
     }
 
-    static GLCapabilitiesImmutable NSPixelFormat2GLCapabilities(GLProfile glp, long pixelFormat) {
+    static GLCapabilities NSPixelFormat2GLCapabilities(GLProfile glp, long pixelFormat) {
         return PixelFormat2GLCapabilities(glp, pixelFormat, true);
     }
 
-    static long GLCapabilities2CGLPixelFormat(GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
+    static long GLCapabilities2CGLPixelFormat(AbstractGraphicsDevice device, GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
       // Set up pixel format attributes
-      int[] attrs = new int[256];
+      final IntBuffer attrs = Buffers.newDirectIntBuffer(256);
       int i = 0;
       if(MacOSXCGLContext.isLionOrLater) {
-          attrs[i++] = CGL.kCGLPFAOpenGLProfile; 
-          attrs[i++] = MacOSXCGLContext.GLProfile2CGLOGLProfileValue(ctp, major, minor);
-      }
-      if(caps.isPBuffer()) {
-        attrs[i++] = CGL.kCGLPFAPBuffer;
-      }
-      if (caps.getPbufferFloatingPointBuffers()) {
-        attrs[i++] = CGL.kCGLPFAColorFloat;
+          attrs.put(i++, CGL.kCGLPFAOpenGLProfile);
+          attrs.put(i++, MacOSXCGLContext.GLProfile2CGLOGLProfileValue(device, ctp, major, minor));
       }
+      /**
+      if(!caps.isOnscreen() && caps.isPBuffer()) {
+        attrs.put(i++, CGL.kCGLPFAPBuffer);
+        if (caps.getPbufferFloatingPointBuffers()) {
+          attrs.put(i++, CGL.kCGLPFAColorFloat);
+        }
+      } */
       if (caps.getDoubleBuffered()) {
-        attrs[i++] = CGL.kCGLPFADoubleBuffer;
+        attrs.put(i++, CGL.kCGLPFADoubleBuffer);
       }
       if (caps.getStereo()) {
-        attrs[i++] = CGL.kCGLPFAStereo;
+        attrs.put(i++, CGL.kCGLPFAStereo);
       }
-      attrs[i++] = CGL.kCGLPFAColorSize;
-      attrs[i++] = (caps.getRedBits() +
-                    caps.getGreenBits() +
-                    caps.getBlueBits());
-      attrs[i++] = CGL.kCGLPFAAlphaSize;
-      attrs[i++] = caps.getAlphaBits();
-      attrs[i++] = CGL.kCGLPFADepthSize;
-      attrs[i++] = caps.getDepthBits();
+      attrs.put(i++, CGL.kCGLPFAColorSize);
+      attrs.put(i++, ( caps.getRedBits() +
+                       caps.getGreenBits() +
+                       caps.getBlueBits() ) );
+      attrs.put(i++, CGL.kCGLPFAAlphaSize);
+      attrs.put(i++, caps.getAlphaBits());
+      attrs.put(i++, CGL.kCGLPFADepthSize);
+      attrs.put(i++, caps.getDepthBits());
       // FIXME: should validate stencil size as is done in MacOSXWindowSystemInterface.m
-      attrs[i++] = CGL.kCGLPFAStencilSize;
-      attrs[i++] = caps.getStencilBits();
-      attrs[i++] = CGL.kCGLPFAAccumSize;
-      attrs[i++] = (caps.getAccumRedBits() +
-                    caps.getAccumGreenBits() +
-                    caps.getAccumBlueBits() +
-                    caps.getAccumAlphaBits());
+      attrs.put(i++, CGL.kCGLPFAStencilSize);
+      attrs.put(i++, caps.getStencilBits());
+      attrs.put(i++, CGL.kCGLPFAAccumSize);
+      attrs.put(i++, ( caps.getAccumRedBits() +
+                       caps.getAccumGreenBits() +
+                       caps.getAccumBlueBits() +
+                       caps.getAccumAlphaBits() ) );
       if (caps.getSampleBuffers()) {
-        attrs[i++] = CGL.kCGLPFASampleBuffers;
-        attrs[i++] = 1;
-        attrs[i++] = CGL.kCGLPFASamples;
-        attrs[i++] = caps.getNumSamples();
+        attrs.put(i++, CGL.kCGLPFASampleBuffers);
+        attrs.put(i++, 1);
+        attrs.put(i++, CGL.kCGLPFASamples);
+        attrs.put(i++, caps.getNumSamples());
       }
 
       // Use attribute array to select pixel format
       PointerBuffer fmt = PointerBuffer.allocateDirect(1);
-      int[] numScreens = new int[1];
-      int res = CGL.CGLChoosePixelFormat(attrs, 0, fmt, numScreens, 0);
+      IntBuffer numScreens = Buffers.newDirectIntBuffer(1);
+      int res = CGL.CGLChoosePixelFormat(attrs, fmt, numScreens);
       if (res != CGL.kCGLNoError) {
         throw new GLException("Error code " + res + " while choosing pixel format");
       }
       return fmt.get(0);
     }
-    
-    static GLCapabilitiesImmutable CGLPixelFormat2GLCapabilities(long pixelFormat) {
+
+    static GLCapabilities CGLPixelFormat2GLCapabilities(long pixelFormat) {
         return PixelFormat2GLCapabilities(null, pixelFormat, false);
     }
 
-    private static GLCapabilitiesImmutable PixelFormat2GLCapabilities(GLProfile glp, long pixelFormat, boolean nsUsage) {
-        int len = cglInternalAttributeToken.length;
-        int off = 0;
+    private static GLCapabilities PixelFormat2GLCapabilities(GLProfile glp, long pixelFormat, boolean nsUsage) {
+        final IntBuffer attrToken = cglInternalAttributeToken.duplicate();
+        final int off;
         if ( !MacOSXCGLContext.isLionOrLater ) {
             // no OpenGLProfile
-            off++;
-            len--;
-        }        
-        int[] ivalues = new int[len];
+            off = 1;
+        } else {
+            off = 0;
+        }
+        attrToken.position(off);
+        final int len = attrToken.remaining();
+        final IntBuffer ivalues = Buffers.newDirectIntBuffer(len);
 
         // On this platform the pixel format is associated with the
         // context and not the drawable. However it's a reasonable
         // approximation to just store the chosen pixel format up in the
-        // NativeSurface's AbstractGraphicsConfiguration, 
+        // NativeSurface's AbstractGraphicsConfiguration,
         // since the public API doesn't provide for a different GLCapabilities per context.
         // Note: These restrictions of the platform's API might be considered as a bug anyways.
 
         // Figure out what attributes we really got
         if(nsUsage) {
-            CGL.queryPixelFormat(pixelFormat, cglInternalAttributeToken, off, len, ivalues, 0);
+            CGL.queryPixelFormat(pixelFormat, attrToken, len, ivalues);
         } else {
-            CGL.CGLQueryPixelFormat(pixelFormat, cglInternalAttributeToken, off, len, ivalues, 0);
+            CGL.CGLQueryPixelFormat(pixelFormat, attrToken, len, ivalues);
         }
+
         if(null == glp && MacOSXCGLContext.isLionOrLater) {
             // pre-scan for OpenGL Profile
             for (int i = 0; i < len; i++) {
-                if(CGL.kCGLPFAOpenGLProfile == cglInternalAttributeToken[i+off]) {
-                    switch(ivalues[i]) {
-                        case CGL.kCGLOGLPVersion_3_2_Core:
+                final int ivalue = ivalues.get(i);
+                if(CGL.kCGLPFAOpenGLProfile == attrToken.get(i+off)) {
+                    switch(ivalue) {
+                        case CGL.kCGLOGLPVersion_GL4_Core:
+                            glp = GLProfile.get(GLProfile.GL4);
+                            break;
+                        case CGL.kCGLOGLPVersion_GL3_Core:
                             glp = GLProfile.get(GLProfile.GL3);
                             break;
                         case CGL.kCGLOGLPVersion_Legacy:
                             glp = GLProfile.get(GLProfile.GL2);
-                            break;                            
+                            break;
                         default:
-                            throw new RuntimeException("Unhandled OSX OpenGL Profile: 0x"+Integer.toHexString(ivalues[i]));
+                            throw new RuntimeException("Unhandled OSX OpenGL Profile: 0x"+Integer.toHexString(ivalue));
                     }
-                }            
+                }
             }
         }
         if(null == glp) {
             glp = GLProfile.get(GLProfile.GL2);
         }
-        GLCapabilities caps = new GLCapabilities(glp);
+        final GLCapabilities caps = new GLCapabilities(glp);
+        int alphaBits = 0;
         for (int i = 0; i < len; i++) {
-          int attr = cglInternalAttributeToken[i+off];
+          final int attr = attrToken.get(i+off);
+          final int ivalue = ivalues.get(i);
           switch (attr) {
               case CGL.NSOpenGLPFAAccelerated:
-                caps.setHardwareAccelerated(ivalues[i] != 0);
+                caps.setHardwareAccelerated(ivalue != 0);
                 break;
-                
+
               case CGL.kCGLPFAColorFloat:
-                caps.setPbufferFloatingPointBuffers(ivalues[i] != 0);
+                // caps.setPbufferFloatingPointBuffers(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFAPixelBuffer:
-                caps.setPBuffer(ivalues[i] != 0);
+                caps.setPBuffer(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFADoubleBuffer:
-                caps.setDoubleBuffered(ivalues[i] != 0);
+                caps.setDoubleBuffered(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFAStereo:
-                caps.setStereo(ivalues[i] != 0);
+                caps.setStereo(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFAColorSize:
                 {
-                  int bitSize = ivalues[i];
-                  if (bitSize == 32)
-                    bitSize = 24;
-                  bitSize /= 3;
+                  final int bitSize = ( 32 == ivalue ? 24 : ivalue ) / 3;
                   caps.setRedBits(bitSize);
                   caps.setGreenBits(bitSize);
                   caps.setBlueBits(bitSize);
@@ -317,16 +314,17 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
                 break;
 
               case CGL.NSOpenGLPFAAlphaSize:
-                caps.setAlphaBits(ivalues[i]);
+                // ALPHA shall be set at last - due to it's auto setting by !opaque / samples
+                alphaBits = ivalue;
                 break;
 
               case CGL.NSOpenGLPFADepthSize:
-                caps.setDepthBits(ivalues[i]);
+                caps.setDepthBits(ivalue);
                 break;
 
               case CGL.NSOpenGLPFAAccumSize:
                 {
-                  int bitSize = ivalues[i] / 4;
+                  final int bitSize = ivalue / 4;
                   caps.setAccumRedBits(bitSize);
                   caps.setAccumGreenBits(bitSize);
                   caps.setAccumBlueBits(bitSize);
@@ -335,21 +333,22 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
                 break;
 
               case CGL.NSOpenGLPFAStencilSize:
-                caps.setStencilBits(ivalues[i]);
+                caps.setStencilBits(ivalue);
                 break;
 
               case CGL.NSOpenGLPFASampleBuffers:
-                caps.setSampleBuffers(ivalues[i] != 0);
+                caps.setSampleBuffers(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFASamples:
-                caps.setNumSamples(ivalues[i]);
+                caps.setNumSamples(ivalue);
                 break;
 
               default:
                 break;
           }
         }
+        caps.setAlphaBits(alphaBits);
 
         return caps;
       }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
index 1a9070aef..db2a1df68 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -34,13 +34,17 @@
 package jogamp.opengl.macosx.cgl;
 
 import jogamp.opengl.GLGraphicsConfigurationFactory;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLDrawableFactory;
 
 
 /** Subclass of GraphicsConfigurationFactory used when non-AWT tookits
@@ -50,21 +54,16 @@ import javax.media.opengl.GLCapabilitiesImmutable;
 
 public class MacOSXCGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
     static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice.class, new MacOSXCGLGraphicsConfigurationFactory());
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice.class, GLCapabilitiesImmutable.class, new MacOSXCGLGraphicsConfigurationFactory());
     }
-    private MacOSXCGLGraphicsConfigurationFactory() {        
+    private MacOSXCGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
-        return chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, absScreen, false);
-    }
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
 
-    static MacOSXCGLGraphicsConfiguration chooseGraphicsConfigurationStatic(CapabilitiesImmutable capsChosen,
-                                                                            CapabilitiesImmutable capsRequested,
-                                                                            CapabilitiesChooser chooser,
-                                                                            AbstractGraphicsScreen absScreen, boolean usePBuffer) {
         if (absScreen == null) {
             throw new IllegalArgumentException("AbstractGraphicsScreen is null");
         }
@@ -77,11 +76,23 @@ public class MacOSXCGLGraphicsConfigurationFactory extends GLGraphicsConfigurati
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - requested");
         }
 
-        if (chooser != null &&
-            !(chooser instanceof GLCapabilitiesChooser)) {
+        if (chooser != null && !(chooser instanceof GLCapabilitiesChooser)) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilitiesChooser objects");
         }
 
-        return new MacOSXCGLGraphicsConfiguration(absScreen, (GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, 0);
+        return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, (GLCapabilitiesChooser)chooser, absScreen, false);
+    }
+
+    static MacOSXCGLGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
+                                                                            GLCapabilitiesImmutable capsRequested,
+                                                                            GLCapabilitiesChooser chooser,
+                                                                            AbstractGraphicsScreen absScreen, boolean usePBuffer) {
+        if (absScreen == null) {
+            throw new IllegalArgumentException("AbstractGraphicsScreen is null");
+        }
+        final AbstractGraphicsDevice device = absScreen.getDevice();
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLDrawableFactory.getDesktopFactory(), device);
+
+        return new MacOSXCGLGraphicsConfiguration(absScreen, (GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested);
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
index 58cea4ade..ebb0fc6d1 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -49,23 +49,21 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 
-import com.jogamp.nativewindow.WrappedSurface;
-
-import jogamp.opengl.GLContextImpl;
+import jogamp.nativewindow.WrappedSurface;
 import jogamp.opengl.GLContextShareSet;
 import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
 
 
 public class MacOSXExternalCGLContext extends MacOSXCGLContext {
-  private GLContext lastContext;
 
   private MacOSXExternalCGLContext(Drawable drawable, boolean isNSContext, long handle) {
     super(drawable, null);
     setOpenGLMode(isNSContext ? GLBackendType.NSOPENGL : GLBackendType.CGL );
-    drawable.registerContext(this);
     this.contextHandle = handle;
     GLContextShareSet.contextCreated(this);
-    setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT);
+    if( !setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+        throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+    }
     getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
   }
 
@@ -108,44 +106,30 @@ public class MacOSXExternalCGLContext extends MacOSXCGLContext {
     }
 
     AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_MACOSX);
-    MacOSXCGLGraphicsConfiguration cfg = new MacOSXCGLGraphicsConfiguration(aScreen, caps, caps, pixelFormat);
+    MacOSXCGLGraphicsConfiguration cfg = new MacOSXCGLGraphicsConfiguration(aScreen, caps, caps);
 
     if(0 == currentDrawable) {
         // set a fake marker stating a valid drawable
-        currentDrawable = 1; 
+        currentDrawable = 1;
     }
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(currentDrawable);
+    WrappedSurface ns = new WrappedSurface(cfg, currentDrawable, 64, 64, true);
     return new MacOSXExternalCGLContext(new Drawable(factory, ns), isNSContext, contextHandle);
   }
 
-  protected boolean createImpl(GLContextImpl shareWith) throws GLException {
+  @Override
+  protected boolean createImpl(final long shareWithHandle) throws GLException {
       return true;
   }
 
-  public int makeCurrent() throws GLException {
-    // Save last context if necessary to allow external GLContexts to
-    // talk to other GLContexts created by this library
-    GLContext cur = getCurrent();
-    if (cur != null && cur != this) {
-      lastContext = cur;
-      setCurrent(null);
-    }
-    return super.makeCurrent();
-  }  
-
-  public void release() throws GLException {
-    super.release();
-    setCurrent(lastContext);
-    lastContext = null;
-  }
-
+  @Override
   protected void makeCurrentImpl() throws GLException {
   }
 
+  @Override
   protected void releaseImpl() throws GLException {
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
   }
 
@@ -155,14 +139,17 @@ public class MacOSXExternalCGLContext extends MacOSXCGLContext {
       super(factory, comp, true);
     }
 
+    @Override
     public GLContext createContext(GLContext shareWith) {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getWidth() {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getHeight() {
       throw new GLException("Should not call this");
     }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLContext.java
deleted file mode 100644
index 949963fa0..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLContext.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl;
-
-import javax.media.opengl.*;
-import jogamp.opengl.*;
-
-public class MacOSXOffscreenCGLContext extends MacOSXPbufferCGLContext
-{  
-  public MacOSXOffscreenCGLContext(MacOSXPbufferCGLDrawable drawable,
-                                  GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-    
-  public int getOffscreenContextPixelDataType() {
-    GL gl = getGL();
-    return gl.isGL2GL3()?GL2GL3.GL_UNSIGNED_INT_8_8_8_8_REV:GL.GL_UNSIGNED_SHORT_5_5_5_1;
-  }
-
-  public int getOffscreenContextReadBuffer() {
-    return GL.GL_FRONT;
-  }
-
-  public boolean offscreenImageNeedsVerticalFlip() {
-    return true;
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java
index f81cd725e..446a834b9 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -51,7 +51,8 @@ public class MacOSXOffscreenCGLDrawable extends MacOSXPbufferCGLDrawable {
     super(factory, target);
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new MacOSXOffscreenCGLContext(this, shareWith);
+    return new MacOSXCGLContext(this, shareWith);
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
deleted file mode 100644
index 9e051311c..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl;
-
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
-
-import jogamp.opengl.GLContextImpl;
-
-public class MacOSXOnscreenCGLContext extends MacOSXCGLContext {
-
-  public MacOSXOnscreenCGLContext(MacOSXOnscreenCGLDrawable drawable,
-                                 GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  @Override
-  protected void makeCurrentImpl() throws GLException {
-      super.makeCurrentImpl();
-      drawableUpdatedNotify();  
-  }
-    
-  @Override
-  protected void drawableUpdatedNotify() throws GLException {
-    final int w = drawable.getWidth();
-    final int h = drawable.getHeight();
-    final boolean updateContext = ( 0!=updateHandle && CGL.updateContextNeedsUpdate(updateHandle) ) ||
-                                  w != lastWidth || h != lastHeight;
-    if(updateContext) {
-        lastWidth = w;
-        lastHeight = h;
-        if (contextHandle == 0) {
-          throw new GLException("Context not created");
-        }
-        CGL.updateContext(contextHandle);
-    }
-  }
-  
-  @Override
-  protected boolean createImpl(GLContextImpl sharedWith) {
-    boolean res = super.createImpl(sharedWith);
-    lastWidth = -1; 
-    lastHeight = -1;    
-    if(res && isNSContext()) {
-        if(0 != updateHandle) {
-            throw new InternalError("XXX1");
-        }
-        updateHandle = CGL.updateContextRegister(contextHandle, drawable.getHandle());
-        if(0 == updateHandle) {
-            throw new InternalError("XXX2");
-        }
-    }
-    return res;
-  }
-
-  @Override
-  protected void destroyImpl() throws GLException {
-    if ( 0 != updateHandle ) {
-        CGL.updateContextUnregister(updateHandle);
-        updateHandle = 0;
-    }
-    super.destroyImpl();    
-  }
-  
-  private long updateHandle = 0;
-  private int lastWidth, lastHeight;
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java
index 80c54042f..c6f0c1383 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -45,15 +45,14 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 
 public class MacOSXOnscreenCGLDrawable extends MacOSXCGLDrawable {
-  
+
   protected MacOSXOnscreenCGLDrawable(GLDrawableFactory factory, NativeSurface component) {
     super(factory, component, false);
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    final MacOSXOnscreenCGLContext ctx= new MacOSXOnscreenCGLContext(this, shareWith);
-    registerContext(ctx);
-    return ctx;
+    return new MacOSXCGLContext(this, shareWith);
   }
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLContext.java
deleted file mode 100644
index 7ba7d2d5a..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLContext.java
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- */
-
-package jogamp.opengl.macosx.cgl;
-
-import javax.media.opengl.GL;
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
-import javax.media.opengl.GLPbuffer;
-
-import jogamp.opengl.GLContextImpl;
-
-public class MacOSXPbufferCGLContext extends MacOSXCGLContext {
-
-  // State for render-to-texture and render-to-texture-rectangle support
-  private int texture;       // actual texture object
-
-  public MacOSXPbufferCGLContext(MacOSXPbufferCGLDrawable drawable,
-                                GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  public void bindPbufferToTexture() {
-    GL gl = getGL();
-    gl.glBindTexture(((MacOSXPbufferCGLDrawable)drawable).getTextureTarget(), texture);
-    // FIXME: not clear whether this is really necessary, but since
-    // the API docs seem to imply it is and since it doesn't seem to
-    // impact performance, leaving it in
-    CGL.setContextTextureImageToPBuffer(contextHandle, drawable.getHandle(), GL.GL_FRONT);
-  }
-
-  public void releasePbufferFromTexture() {
-  }
-
-  protected boolean createImpl(GLContextImpl shareWith) {
-    boolean res = super.createImpl(shareWith);
-    if(res) {  
-      // Initialize render-to-texture support if requested
-      final GL gl = getGL();
-      final MacOSXPbufferCGLDrawable osxPDrawable = (MacOSXPbufferCGLDrawable)drawable;
-      final int textureTarget = osxPDrawable.getTextureTarget();
-  
-      int[] tmp = new int[1];
-      gl.glGenTextures(1, tmp, 0);
-      texture = tmp[0];
-      gl.glBindTexture(textureTarget, texture);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
-      gl.glTexImage2D(textureTarget, 0, GL.GL_RGB, osxPDrawable.getTextureWidth(), osxPDrawable.getTextureHeight(), 
-                      0, GL.GL_RGB, GL.GL_UNSIGNED_BYTE, null);
-      gl.glCopyTexSubImage2D(textureTarget, 0, 0, 0, 0, 0, drawable.getWidth(), drawable.getHeight());
-    }
-    return res;
-  }
-
-  public int getFloatingPointMode() {
-    return GLPbuffer.APPLE_FLOAT;
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
index 1e49d1fc9..f6e8b8fa3 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,20 +29,22 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.macosx.cgl;
 
+import java.lang.ref.WeakReference;
+
 import javax.media.nativewindow.DefaultGraphicsConfiguration;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2;
 import javax.media.opengl.GLCapabilitiesImmutable;
@@ -54,7 +56,7 @@ import javax.media.opengl.GLProfile;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.opengl.util.GLBuffers;
 
-public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {  
+public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
   // Abstract interface for implementation of this drawable (either
   // NSOpenGL-based or CGL-based)
   interface GLBackendImpl {
@@ -64,24 +66,18 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
 
   // Implementation object (either NSOpenGL-based or CGL-based)
   protected GLBackendImpl impl;
-  
+
   // State for render-to-texture and render-to-texture-rectangle support
   // private int textureTarget; // e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_NV
   // private int texture;       // actual texture object
 
-  // Note that we can not store this in the NativeSurface because the
-  // semantic is that contains an NSView
-  protected long pBuffer;
   protected int pBufferTexTarget, pBufferTexWidth, pBufferTexHeight;
 
   public MacOSXPbufferCGLDrawable(GLDrawableFactory factory, NativeSurface target) {
     super(factory, target, false);
   }
 
-  protected void destroyImpl() {
-    setRealized(false);  
-  }
-  
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         createPbuffer();
@@ -90,45 +86,45 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    final MacOSXPbufferCGLContext ctx = new MacOSXPbufferCGLContext(this, shareWith);
-    registerContext(ctx);
-    return ctx;
+    return new MacOSXCGLContext(this, shareWith);
   }
 
-  @Override
-  protected long getNSViewHandle() {
-      // pbuffer handle is NSOpenGLPixelBuffer
-      return 0;
-  }
-  
-  @Override
-  public long getHandle() {
-    return pBuffer;
-  }
-  
   protected int getTextureTarget() { return pBufferTexTarget;  }
   protected int getTextureWidth() { return pBufferTexWidth; }
   protected int getTextureHeight() { return pBufferTexHeight; }
-    
+
   protected void destroyPbuffer() {
-    if (this.pBuffer != 0) {
-      NativeSurface ns = getNativeSurface();
+    final MutableSurface ms = (MutableSurface) getNativeSurface();
+    final long pBuffer = ms.getSurfaceHandle();
+    if (0 != pBuffer) {
+      synchronized (createdContexts) {
+        for(int i=0; i<createdContexts.size(); ) {
+          final WeakReference<MacOSXCGLContext> ref = createdContexts.get(i);
+          final MacOSXCGLContext ctx = ref.get();
+          if (ctx != null) {
+            ctx.detachPBuffer();
+            i++;
+          } else {
+            createdContexts.remove(i);
+          }
+        }
+      }
       impl.destroy(pBuffer);
-      this.pBuffer = 0;
-      ((SurfaceChangeable)ns).setSurfaceHandle(0);
+      ms.setSurfaceHandle(0);
     }
   }
 
   private void createPbuffer() {
-    final NativeSurface ns = getNativeSurface();
-    final DefaultGraphicsConfiguration config = (DefaultGraphicsConfiguration) ns.getGraphicsConfiguration();
+    final MutableSurface ms = (MutableSurface) getNativeSurface();
+    final DefaultGraphicsConfiguration config = (DefaultGraphicsConfiguration) ms.getGraphicsConfiguration();
     final GLCapabilitiesImmutable capabilities = (GLCapabilitiesImmutable)config.getChosenCapabilities();
     final GLProfile glProfile = capabilities.getGLProfile();
-    MacOSXCGLDrawableFactory.SharedResource sr = ((MacOSXCGLDrawableFactory)factory).getOrCreateOSXSharedResource(config.getScreen().getDevice());
-    
+    MacOSXCGLDrawableFactory.SharedResource sr = ((MacOSXCGLDrawableFactory)factory).getOrCreateSharedResourceImpl(config.getScreen().getDevice());
+
     if (DEBUG) {
-        System.out.println("Pbuffer config: " + config);
+        System.out.println(getThreadName()+": Pbuffer config: " + config);
         if(null != sr) {
             System.out.println("Pbuffer NPOT Texure  avail: "+sr.isNPOTTextureAvailable());
             System.out.println("Pbuffer RECT Texture avail: "+sr.isRECTTextureAvailable());
@@ -137,12 +133,8 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
         }
     }
 
-    if ( capabilities.getPbufferRenderToTextureRectangle() && null!=sr && sr.isRECTTextureAvailable() ) {
-      pBufferTexTarget = GL2.GL_TEXTURE_RECTANGLE;
-    } else {
-      pBufferTexTarget = GL.GL_TEXTURE_2D;
-    }
-    if ( GL2.GL_TEXTURE_RECTANGLE == pBufferTexTarget || ( null!=sr && sr.isNPOTTextureAvailable() ) ) { 
+    pBufferTexTarget = GL.GL_TEXTURE_2D;
+    if ( null!=sr && sr.isNPOTTextureAvailable() ) {
       pBufferTexWidth = getWidth();
       pBufferTexHeight = getHeight();
     } else {
@@ -150,19 +142,8 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       pBufferTexHeight = GLBuffers.getNextPowerOf2(getHeight());
     }
 
-    int internalFormat = GL.GL_RGBA;
-    if (capabilities.getPbufferFloatingPointBuffers()) {
-      if(!glProfile.isGL2GL3() || null==sr || sr.isAppleFloatPixelsAvailable()) {
-          throw new GLException("Floating-point support (GL_APPLE_float_pixels) not available");
-      }
-      switch (capabilities.getRedBits()) {
-        case 16: internalFormat = GL2.GL_RGBA_FLOAT16_APPLE; break;
-        case 32: internalFormat = GL2.GL_RGBA_FLOAT32_APPLE; break;
-        default: throw new GLException("Invalid floating-point bit depth (only 16 and 32 supported)");
-      }
-    }
-    
-    pBuffer = impl.create(pBufferTexTarget, internalFormat, getWidth(), getHeight());
+    final int internalFormat = GL.GL_RGBA;
+    final long pBuffer = impl.create(pBufferTexTarget, internalFormat, getWidth(), getHeight());
     if(DEBUG) {
         System.err.println("MacOSXPbufferCGLDrawable tex: target "+toHexString(pBufferTexTarget)+
                             ", pbufferSize "+getWidth()+"x"+getHeight()+
@@ -175,14 +156,16 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       throw new GLException("pbuffer creation error: CGL.createPBuffer() failed");
     }
 
-    ((SurfaceChangeable)ns).setSurfaceHandle(pBuffer);
+    ms.setSurfaceHandle(pBuffer);
   }
 
+  @Override
   public void setOpenGLMode(GLBackendType mode) {
     super.setOpenGLMode(mode);
     createPbuffer(); // recreate
   }
 
+  @Override
   protected void initOpenGLImpl(GLBackendType backend) {
     switch (backend) {
       case NSOPENGL:
@@ -194,14 +177,16 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       default:
         throw new InternalError("Illegal implementation mode " + backend);
     }
-  }  
-  
+  }
+
   // NSOpenGLPixelBuffer implementation
   class NSOpenGLImpl implements GLBackendImpl {
+    @Override
     public long create(int renderTarget, int internalFormat, int width, int height) {
       return CGL.createPBuffer(renderTarget, internalFormat, width, height);
     }
 
+    @Override
     public void destroy(long pbuffer) {
       CGL.destroyPBuffer(pbuffer);
     }
@@ -209,6 +194,7 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
 
   // CGL implementation
   class CGLImpl implements GLBackendImpl {
+    @Override
     public long create(int renderTarget, int internalFormat, int width, int height) {
       PointerBuffer pbuffer = PointerBuffer.allocateDirect(1);
       int res = CGL.CGLCreatePBuffer(width, height, renderTarget, internalFormat, 0, pbuffer);
@@ -218,12 +204,13 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       return pbuffer.get(0);
     }
 
+    @Override
     public void destroy(long pbuffer) {
       int res = CGL.CGLDestroyPBuffer(pbuffer);
       if (res != CGL.kCGLNoError) {
         throw new GLException("Error destroying CGL-based pbuffer: error code " + res);
       }
     }
-  }  
-  
+  }
+
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLDrawableFactory.java
deleted file mode 100644
index fe60710f0..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLDrawableFactory.java
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl.awt;
-
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import jogamp.opengl.macosx.cgl.*;
-
-public class MacOSXAWTCGLDrawableFactory extends MacOSXCGLDrawableFactory {
-
-  public MacOSXAWTCGLDrawableFactory() {
-    super();
-  }
-
-  public boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-    return true;
-  }
-
-  public GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException {
-    return new MacOSXJava2DCGLContext(shareWith);
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
index a6fa01bad..21923531f 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -58,14 +58,15 @@ import jogamp.opengl.macosx.cgl.MacOSXCGLGraphicsConfiguration;
 
 public class MacOSXAWTCGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
     public static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, new MacOSXAWTCGLGraphicsConfigurationFactory());
-    }    
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, GLCapabilitiesImmutable.class, new MacOSXAWTCGLGraphicsConfigurationFactory());
+    }
     private MacOSXAWTCGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         GraphicsDevice device = null;
         if (absScreen != null &&
             !(absScreen instanceof AWTGraphicsScreen)) {
@@ -103,9 +104,9 @@ public class MacOSXAWTCGLGraphicsConfigurationFactory extends GLGraphicsConfigur
 
         GraphicsConfiguration gc = device.getDefaultConfiguration();
         MacOSXCGLGraphicsConfiguration macConfig = (MacOSXCGLGraphicsConfiguration)
-            GraphicsConfigurationFactory.getFactory(macDevice).chooseGraphicsConfiguration(capsChosen,
+            GraphicsConfigurationFactory.getFactory(macDevice, capsChosen).chooseGraphicsConfiguration(capsChosen,
                                                                                            capsRequested,
-                                                                                           chooser, macScreen);
+                                                                                           chooser, macScreen, nativeVisualID);
 
         if (macConfig == null) {
             throw new GLException("Unable to choose a GraphicsConfiguration: "+capsChosen+",\n\t"+chooser+"\n\t"+macScreen);
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXJava2DCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXJava2DCGLContext.java
deleted file mode 100644
index f41400d83..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXJava2DCGLContext.java
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl.awt;
-
-import java.awt.Graphics;
-
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
-
-import jogamp.opengl.GLContextImpl;
-import jogamp.opengl.awt.Java2D;
-import jogamp.opengl.awt.Java2DGLContext;
-import jogamp.opengl.macosx.cgl.MacOSXCGLContext;
-import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
-
-
-/** MacOSXCGLContext implementation supporting the Java2D/JOGL bridge
- * on Mac OS X. The external GLDrawable mechanism does not work on Mac
- * OS X due to how drawables and contexts are operated upon on this
- * platform, so it is necessary to supply an alternative means to
- * create, make current, and destroy contexts on the Java2D "drawable"
- * on the Mac platform.
- */
-
-public class MacOSXJava2DCGLContext extends MacOSXCGLContext implements Java2DGLContext {
-  private Graphics graphics;
-
-  // FIXME: ignoring context sharing for the time being; will need to
-  // rethink this in particular if using FBOs to implement the
-  // Java2D/OpenGL pipeline on Mac OS X
-
-  MacOSXJava2DCGLContext(GLContext shareWith) {
-    super(null, shareWith);
-  }
-
-  public void setGraphics(Graphics g) {
-    this.graphics = g;
-  }
-
-  protected void makeCurrentImpl() throws GLException {
-    if (!Java2D.makeOGLContextCurrentOnSurface(graphics, contextHandle)) {
-      throw new GLException("Error making context current");
-    }            
-  }
-
-  protected boolean createImpl(GLContextImpl shareWith) {
-    long share = createImplPreset(shareWith);
-    
-    long ctx = Java2D.createOGLContextOnSurface(graphics, share);
-    if (ctx == 0) {
-      if(DEBUG) { 
-          System.err.println("Error creating current: "+this);
-      }
-      return false;
-    }
-    if (!Java2D.makeOGLContextCurrentOnSurface(graphics, contextHandle)) {
-      Java2D.destroyOGLContext(ctx);
-      if(DEBUG) { 
-          System.err.println("Error making created context current: "+this);
-      }
-      return false;
-    }
-    setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT); // use GL_VERSION
-    contextHandle = ctx;
-    return true;
-  }
-
-  protected void releaseImpl() throws GLException {
-    // FIXME: would need another primitive in the Java2D class in
-    // order to implement this; hopefully should not matter for
-    // correctness
-  }
-
-  protected void destroyImpl() throws GLException {
-      Java2D.destroyOGLContext(contextHandle);
-  }
-
-  public void setOpenGLMode(GLBackendType mode) {
-    if (mode != GLBackendType.CGL) {
-      throw new GLException("OpenGL mode switching not supported for Java2D GLContexts");
-    }
-    super.setOpenGLMode(mode);
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java b/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java
new file mode 100644
index 000000000..eeaaa5872
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/openal/av/ALAudioSink.java
@@ -0,0 +1,947 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.openal.av;
+
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+import jogamp.opengl.Debug;
+
+import com.jogamp.common.util.LFRingbuffer;
+import com.jogamp.common.util.Ringbuffer;
+import com.jogamp.common.util.locks.LockFactory;
+import com.jogamp.common.util.locks.RecursiveLock;
+import com.jogamp.openal.AL;
+import com.jogamp.openal.ALC;
+import com.jogamp.openal.ALCcontext;
+import com.jogamp.openal.ALCdevice;
+import com.jogamp.openal.ALExt;
+import com.jogamp.openal.ALFactory;
+import com.jogamp.openal.util.ALHelpers;
+import com.jogamp.opengl.util.av.AudioSink;
+
+/***
+ * OpenAL Audio Sink
+ */
+public class ALAudioSink implements AudioSink {
+
+    private static final String AL_SOFT_buffer_samples = "AL_SOFT_buffer_samples";
+    private static final String ALC_EXT_thread_local_context = "ALC_EXT_thread_local_context";
+    private static final boolean DEBUG_TRACE;
+    private static final ALC alc;
+    private static final AL al;
+    private static final ALExt alExt;
+    private static final boolean staticAvailable;
+
+    private String deviceSpecifier;
+    private ALCdevice device;
+    private boolean hasSOFTBufferSamples;
+    private boolean hasALC_thread_local_context;
+    private AudioFormat preferredAudioFormat;
+    private ALCcontext context;
+    private final RecursiveLock lock = LockFactory.createRecursiveLock();
+
+    /** Playback speed, range [0.5 - 2.0], default 1.0. */
+    private float playSpeed;
+    private float volume = 1.0f;
+
+    static class ALAudioFrame extends AudioFrame {
+        private final int alBuffer;
+
+        ALAudioFrame(int alBuffer) {
+            this.alBuffer = alBuffer;
+        }
+        public ALAudioFrame(int alBuffer, int pts, int duration, int dataSize) {
+            super(pts, duration, dataSize);
+            this.alBuffer = alBuffer;
+        }
+
+        /** Get this frame's OpenAL buffer name */
+        public final int getALBuffer() { return alBuffer; }
+
+        public String toString() {
+            return "ALAudioFrame[pts " + pts + " ms, l " + duration + " ms, " + byteSize + " bytes, buffer "+alBuffer+"]";
+        }
+    }
+
+    // private ALAudioFrame[] alFrames = null;
+    private int[] alBufferNames = null;
+    private int frameGrowAmount = 0;
+    private int frameLimit = 0;
+
+    private Ringbuffer<ALAudioFrame> alFramesAvail = null;
+    private Ringbuffer<ALAudioFrame> alFramesPlaying = null;
+    private volatile int alBufferBytesQueued = 0;
+    private volatile int playingPTS = AudioFrame.INVALID_PTS;
+    private volatile int enqueuedFrameCount;
+
+    private int[] alSource = null;
+    private AudioFormat chosenFormat;
+    private int alChannelLayout;
+    private int alSampleType;
+    private int alFormat;
+    private boolean initialized;
+
+    private volatile boolean playRequested = false;
+
+    static {
+        Debug.initSingleton();
+        DEBUG_TRACE = Debug.isPropertyDefined("jogl.debug.AudioSink.trace", true);
+
+        ALC _alc = null;
+        AL _al = null;
+        ALExt _alExt = null;
+        try {
+            _alc = ALFactory.getALC();
+            _al = ALFactory.getAL();
+            _alExt = ALFactory.getALExt();
+        } catch(Throwable t) {
+            if( DEBUG ) {
+                System.err.println("ALAudioSink: Catched "+t.getClass().getName()+": "+t.getMessage());
+                t.printStackTrace();
+            }
+        }
+        alc = _alc;
+        al = _al;
+        alExt = _alExt;
+        staticAvailable = null != alc && null != al && null != alExt;
+    }
+
+    public ALAudioSink() {
+        initialized = false;
+        chosenFormat = null;
+
+        if( !staticAvailable ) {
+            return;
+        }
+        synchronized(ALAudioSink.class) {
+            try {
+                // Get handle to default device.
+                device = alc.alcOpenDevice(null);
+                if (device == null) {
+                    throw new RuntimeException(getThreadName()+": ALAudioSink: Error opening default OpenAL device");
+                }
+
+                // Get the device specifier.
+                deviceSpecifier = alc.alcGetString(device, ALC.ALC_DEVICE_SPECIFIER);
+                if (deviceSpecifier == null) {
+                    throw new RuntimeException(getThreadName()+": ALAudioSink: Error getting specifier for default OpenAL device");
+                }
+
+                // Create audio context.
+                context = alc.alcCreateContext(device, null);
+                if (context == null) {
+                    throw new RuntimeException(getThreadName()+": ALAudioSink: Error creating OpenAL context for "+deviceSpecifier);
+                }
+
+                lockContext();
+                try {
+                    // Check for an error.
+                    if ( alc.alcGetError(device) != ALC.ALC_NO_ERROR ) {
+                        throw new RuntimeException(getThreadName()+": ALAudioSink: Error making OpenAL context current");
+                    }
+
+                    hasSOFTBufferSamples = al.alIsExtensionPresent(AL_SOFT_buffer_samples);
+                    hasALC_thread_local_context = alc.alcIsExtensionPresent(null, ALC_EXT_thread_local_context) ||
+                                                  alc.alcIsExtensionPresent(device, ALC_EXT_thread_local_context) ;
+                    preferredAudioFormat = queryPreferredAudioFormat();
+                    if( DEBUG ) {
+                        System.out.println("ALAudioSink: OpenAL Extensions:"+al.alGetString(AL.AL_EXTENSIONS));
+                        System.out.println("ALAudioSink: Null device OpenAL Extensions:"+alc.alcGetString(null, ALC.ALC_EXTENSIONS));
+                        System.out.println("ALAudioSink: Device "+deviceSpecifier+" OpenAL Extensions:"+alc.alcGetString(device, ALC.ALC_EXTENSIONS));
+                        System.out.println("ALAudioSink: hasSOFTBufferSamples "+hasSOFTBufferSamples);
+                        System.out.println("ALAudioSink: hasALC_thread_local_context "+hasALC_thread_local_context);
+                        System.out.println("ALAudioSink: preferredAudioFormat "+preferredAudioFormat);
+                    }
+
+                    // Create source
+                    {
+                        alSource = new int[1];
+                        al.alGenSources(1, alSource, 0);
+                        final int err = al.alGetError();
+                        if( AL.AL_NO_ERROR != err ) {
+                            alSource = null;
+                            throw new RuntimeException(getThreadName()+": ALAudioSink: Error generating Source: 0x"+Integer.toHexString(err));
+                        }
+                    }
+
+                    if( DEBUG ) {
+                        System.err.println("ALAudioSink: Using device: " + deviceSpecifier);
+                    }
+                    initialized = true;
+                } finally {
+                    unlockContext();
+                }
+                return;
+            } catch ( Exception e ) {
+                if( DEBUG ) {
+                    System.err.println(e.getMessage());
+                }
+                destroy();
+            }
+        }
+    }
+
+    private final AudioFormat queryPreferredAudioFormat() {
+        int sampleRate = DefaultFormat.sampleRate;
+        final int[] value = new int[1];
+        alc.alcGetIntegerv(device, ALC.ALC_FREQUENCY, 1, value, 0);
+        if ( alc.alcGetError(device) == ALC.ALC_NO_ERROR ) {
+            sampleRate = value[0];
+        }
+        return new AudioFormat(sampleRate, DefaultFormat.sampleSize, DefaultFormat.channelCount, DefaultFormat.signed, DefaultFormat.fixedP, DefaultFormat.planar, DefaultFormat.littleEndian);
+    }
+
+    private final void lockContext() {
+        lock.lock();
+        if( hasALC_thread_local_context ) {
+            alExt.alcSetThreadContext(context);
+        } else {
+            alc.alcMakeContextCurrent(context);
+        }
+        final int alcErr = alc.alcGetError(null);
+        if( ALC.ALC_NO_ERROR != alcErr ) {
+            final String err = getThreadName()+": ALCError "+toHexString(alcErr)+" while makeCurrent. "+this;
+            System.err.println(err);
+            Thread.dumpStack();
+            lock.unlock();
+            throw new RuntimeException(err);
+        }
+        final int alErr = al.alGetError();
+        if( ALC.ALC_NO_ERROR != alErr ) {
+            if( DEBUG ) {
+                System.err.println(getThreadName()+": Prev - ALError "+toHexString(alErr)+" @ makeCurrent. "+this);
+                Thread.dumpStack();
+            }
+        }
+    }
+    private final void unlockContext() {
+        if( hasALC_thread_local_context ) {
+            alExt.alcSetThreadContext(null);
+        } else {
+            alc.alcMakeContextCurrent(null);
+        }
+        lock.unlock();
+    }
+    private final void destroyContext() {
+        lock.lock();
+        try {
+            if( null != context ) {
+                try {
+                    alc.alcDestroyContext(context);
+                } catch (Throwable t) {
+                    if( DEBUG ) {
+                        System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                        t.printStackTrace();
+                    }
+                }
+                context = null;
+            }
+            // unroll lock !
+            while(lock.getHoldCount() > 1) {
+                lock.unlock();
+            }
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    @Override
+    public final String toString() {
+        final int alSrcName = null != alSource ? alSource[0] : 0;
+        final int alBuffersLen = null != alBufferNames ? alBufferNames.length : 0;
+        final int ctxHash = context != null ? context.hashCode() : 0;
+        return "ALAudioSink[init "+initialized+", playRequested "+playRequested+", device "+deviceSpecifier+", ctx "+toHexString(ctxHash)+", alSource "+alSrcName+
+               ", chosen "+chosenFormat+
+               ", al[chan "+ALHelpers.alChannelLayoutName(alChannelLayout)+", type "+ALHelpers.alSampleTypeName(alSampleType)+
+               ", fmt "+toHexString(alFormat)+", soft "+hasSOFTBufferSamples+
+               "], playSpeed "+playSpeed+", buffers[total "+alBuffersLen+", avail "+alFramesAvail.size()+", "+
+               "queued["+alFramesPlaying.size()+", apts "+getPTS()+", "+getQueuedTime() + " ms, " + alBufferBytesQueued+" bytes], "+
+               "queue[g "+frameGrowAmount+", l "+frameLimit+"]";
+    }
+
+    private final String shortString() {
+        final int alSrcName = null != alSource ? alSource[0] : 0;
+        final int ctxHash = context != null ? context.hashCode() : 0;
+        return "[ctx "+toHexString(ctxHash)+", playReq "+playRequested+", alSrc "+alSrcName+
+               ", queued["+alFramesPlaying.size()+", " + alBufferBytesQueued+" bytes], "+
+               "queue[g "+frameGrowAmount+", l "+frameLimit+"]";
+    }
+
+    public final String getPerfString() {
+        final int alBuffersLen = null != alBufferNames ? alBufferNames.length : 0;
+        return "Play [buffer "+alFramesPlaying.size()+"/"+alBuffersLen+", apts "+getPTS()+", "+getQueuedTime() + " ms, " + alBufferBytesQueued+" bytes]";
+    }
+
+    @Override
+    public final AudioFormat getPreferredFormat() {
+        if( !staticAvailable ) {
+            return null;
+        }
+        return preferredAudioFormat;
+    }
+
+    @Override
+    public final int getMaxSupportedChannels() {
+        if( !staticAvailable ) {
+            return 0;
+        }
+        return hasSOFTBufferSamples ? 8 : 2;
+    }
+
+    @Override
+    public final boolean isSupported(AudioFormat format) {
+        if( !staticAvailable ) {
+            return false;
+        }
+        if( format.planar || !format.littleEndian ) {
+            // FIXME big-endian supported w/ SOFT where it's native format!
+            return false;
+        }
+        final int alChannelLayout = ALHelpers.getDefaultALChannelLayout(format.channelCount);
+        if( AL.AL_NONE != alChannelLayout ) {
+            final int alSampleType = ALHelpers.getALSampleType(format.sampleSize, format.signed, format.fixedP);
+            if( AL.AL_NONE != alSampleType ) {
+                lockContext();
+                try {
+                    final int alFormat = ALHelpers.getALFormat(alChannelLayout, alSampleType, hasSOFTBufferSamples, al, alExt);
+                    return AL.AL_NONE != alFormat;
+                } finally {
+                    unlockContext();
+                }
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public final boolean init(AudioFormat requestedFormat, float frameDuration, int initialQueueSize, int queueGrowAmount, int queueLimit) {
+        if( !staticAvailable ) {
+            return false;
+        }
+        alChannelLayout = ALHelpers.getDefaultALChannelLayout(requestedFormat.channelCount);
+        alSampleType = ALHelpers.getALSampleType(requestedFormat.sampleSize, requestedFormat.signed, requestedFormat.fixedP);
+        lockContext();
+        try {
+            if( AL.AL_NONE != alChannelLayout && AL.AL_NONE != alSampleType ) {
+                alFormat = ALHelpers.getALFormat(alChannelLayout, alSampleType, hasSOFTBufferSamples, al, alExt);
+            } else {
+                alFormat = AL.AL_NONE;
+            }
+            if( AL.AL_NONE == alFormat ) {
+                // not supported
+                return false;
+            }
+            // Allocate buffers
+            destroyBuffers();
+            {
+                final float useFrameDuration = frameDuration > 1f ? frameDuration : AudioSink.DefaultFrameDuration;
+                final int initialFrameCount = requestedFormat.getFrameCount(
+                        initialQueueSize > 0 ? initialQueueSize : AudioSink.DefaultInitialQueueSize, useFrameDuration);
+                // frameDuration, int initialQueueSize, int queueGrowAmount, int queueLimit) {
+                alBufferNames = new int[initialFrameCount];
+                al.alGenBuffers(initialFrameCount, alBufferNames, 0);
+                final int err = al.alGetError();
+                if( AL.AL_NO_ERROR != err ) {
+                    alBufferNames = null;
+                    throw new RuntimeException(getThreadName()+": ALAudioSink: Error generating Buffers: 0x"+Integer.toHexString(err));
+                }
+                final ALAudioFrame[] alFrames = new ALAudioFrame[initialFrameCount];
+                for(int i=0; i<initialFrameCount; i++) {
+                    alFrames[i] = new ALAudioFrame(alBufferNames[i]);
+                }
+
+                alFramesAvail = new LFRingbuffer<ALAudioFrame>(alFrames);
+                alFramesPlaying = new LFRingbuffer<ALAudioFrame>(ALAudioFrame[].class, initialFrameCount);
+                this.frameGrowAmount = requestedFormat.getFrameCount(
+                        queueGrowAmount > 0 ? queueGrowAmount : AudioSink.DefaultQueueGrowAmount, useFrameDuration);
+                this.frameLimit = requestedFormat.getFrameCount(
+                        queueLimit > 0 ? queueLimit : AudioSink.DefaultQueueLimitWithVideo, useFrameDuration);
+                if( DEBUG_TRACE ) {
+                    alFramesAvail.dump(System.err, "Avail-init");
+                    alFramesPlaying.dump(System.err, "Playi-init");
+                }
+            }
+        } finally {
+            unlockContext();
+        }
+
+        chosenFormat = requestedFormat;
+        return true;
+    }
+
+    private static int[] concat(int[] first, int[] second) {
+        final int[] result = Arrays.copyOf(first, first.length + second.length);
+        System.arraycopy(second, 0, result, first.length, second.length);
+        return result;
+    }
+    /**
+    private static <T> T[] concat(T[] first, T[] second) {
+        final T[] result = Arrays.copyOf(first, first.length + second.length);
+        System.arraycopy(second, 0, result, first.length, second.length);
+        return result;
+    } */
+
+    private boolean growBuffers() {
+        if( !alFramesAvail.isEmpty() || !alFramesPlaying.isFull() ) {
+            throw new InternalError("Buffers: Avail is !empty "+alFramesAvail+" or Playing is !full "+alFramesPlaying);
+        }
+        if( alFramesAvail.capacity() >= frameLimit || alFramesPlaying.capacity() >= frameLimit ) {
+            if( DEBUG ) {
+                System.err.println(getThreadName()+": ALAudioSink.growBuffers: Frame limit "+frameLimit+" reached: Avail "+alFramesAvail+", Playing "+alFramesPlaying);
+            }
+            return false;
+        }
+
+        final int[] newALBufferNames = new int[frameGrowAmount];
+        al.alGenBuffers(frameGrowAmount, newALBufferNames, 0);
+        final int err = al.alGetError();
+        if( AL.AL_NO_ERROR != err ) {
+            if( DEBUG ) {
+                System.err.println(getThreadName()+": ALAudioSink.growBuffers: Error generating "+frameGrowAmount+" new Buffers: 0x"+Integer.toHexString(err));
+            }
+            return false;
+        }
+        alBufferNames = concat(alBufferNames, newALBufferNames);
+
+        final ALAudioFrame[] newALBuffers = new ALAudioFrame[frameGrowAmount];
+        for(int i=0; i<frameGrowAmount; i++) {
+            newALBuffers[i] = new ALAudioFrame(newALBufferNames[i]);
+        }
+        // alFrames = concat(alFrames , newALBuffers);
+
+        alFramesAvail.growEmptyBuffer(newALBuffers);
+        alFramesPlaying.growFullBuffer(frameGrowAmount);
+        if( alFramesAvail.isEmpty() || alFramesPlaying.isFull() ) {
+            throw new InternalError("Buffers: Avail is empty "+alFramesAvail+" or Playing is full "+alFramesPlaying);
+        }
+        if( DEBUG ) {
+            System.err.println(getThreadName()+": ALAudioSink: Buffer grown "+frameGrowAmount+": Avail "+alFramesAvail+", playing "+alFramesPlaying);
+        }
+        if( DEBUG_TRACE ) {
+            alFramesAvail.dump(System.err, "Avail-grow");
+            alFramesPlaying.dump(System.err, "Playi-grow");
+        }
+        return true;
+    }
+
+    private void destroyBuffers() {
+        if( !staticAvailable ) {
+            return;
+        }
+        if( null != alBufferNames ) {
+            try {
+                al.alDeleteBuffers(alBufferNames.length, alBufferNames, 0);
+            } catch (Throwable t) {
+                if( DEBUG ) {
+                    System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                    t.printStackTrace();
+                }
+            }
+            alFramesAvail.clear();
+            alFramesAvail = null;
+            alFramesPlaying.clear();
+            alFramesPlaying = null;
+            alBufferBytesQueued = 0;
+            // alFrames = null;
+            alBufferNames = null;
+        }
+    }
+
+    @Override
+    public final void destroy() {
+        initialized = false;
+        if( !staticAvailable ) {
+            return;
+        }
+        if( null != context ) {
+            lockContext();
+        }
+        try {
+            stopImpl(true);
+            if( null != alSource ) {
+                try {
+                    al.alDeleteSources(1, alSource, 0);
+                } catch (Throwable t) {
+                    if( DEBUG ) {
+                        System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                        t.printStackTrace();
+                    }
+                }
+                alSource = null;
+            }
+
+            destroyBuffers();
+        } finally {
+            destroyContext();
+        }
+        if( null != device ) {
+            try {
+                alc.alcCloseDevice(device);
+            } catch (Throwable t) {
+                if( DEBUG ) {
+                    System.err.println("Catched "+t.getClass().getName()+": "+t.getMessage());
+                    t.printStackTrace();
+                }
+            }
+            device = null;
+        }
+        chosenFormat = null;
+    }
+
+    @Override
+    public final boolean isInitialized() {
+        return initialized;
+    }
+
+    private final int dequeueBuffer(final boolean wait, final boolean ignoreBufferInconsistency) {
+        int alErr = AL.AL_NO_ERROR;
+        final int releaseBufferCount;
+        if( alBufferBytesQueued > 0 ) {
+            final int releaseBufferLimes = Math.max(1, alFramesPlaying.size() / 4 );
+            final int[] val=new int[1];
+            int i=0;
+            do {
+                al.alGetSourcei(alSource[0], AL.AL_BUFFERS_PROCESSED, val, 0);
+                alErr = al.alGetError();
+                if( AL.AL_NO_ERROR != alErr ) {
+                    throw new RuntimeException(getThreadName()+": ALError "+toHexString(alErr)+" while quering processed buffers at source. "+this);
+                }
+                if( wait && val[0] < releaseBufferLimes ) {
+                    i++;
+                    // clip wait at [2 .. 100] ms
+                    final int avgBufferDura = chosenFormat.getBytesDuration( alBufferBytesQueued / alFramesPlaying.size() );
+                    final int sleep = Math.max(2, Math.min(100, releaseBufferLimes * avgBufferDura));
+                    if( DEBUG ) {
+                        System.err.println(getThreadName()+": ALAudioSink: Dequeue.wait["+i+"]: avgBufferDura "+avgBufferDura+", releaseBufferLimes "+releaseBufferLimes+", sleep "+sleep+" ms, playImpl "+(AL.AL_PLAYING == getSourceState(false))+", processed "+val[0]+", "+this);
+                    }
+                    unlockContext();
+                    try {
+                        Thread.sleep( sleep - 1 );
+                    } catch (InterruptedException e) {
+                    } finally {
+                        lockContext();
+                    }
+                }
+            } while ( wait && val[0] < releaseBufferLimes && alBufferBytesQueued > 0 );
+            releaseBufferCount = val[0];
+        } else {
+            releaseBufferCount = 0;
+        }
+
+        if( releaseBufferCount > 0 ) {
+            final int[] buffers = new int[releaseBufferCount];
+            al.alSourceUnqueueBuffers(alSource[0], releaseBufferCount, buffers, 0);
+            alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                throw new RuntimeException(getThreadName()+": ALError "+toHexString(alErr)+" while dequeueing "+releaseBufferCount+" buffers. "+this);
+            }
+            for ( int i=0; i<releaseBufferCount; i++ ) {
+                final ALAudioFrame releasedBuffer = alFramesPlaying.get();
+                if( null == releasedBuffer ) {
+                    if( !ignoreBufferInconsistency ) {
+                        throw new InternalError("Internal Error: "+this);
+                    }
+                } else {
+                    if(DEBUG_TRACE) {
+                        System.err.println("<  [al "+buffers[i]+", q "+releasedBuffer.alBuffer+"] <- "+shortString()+" @ "+getThreadName());
+                    }
+                    if( releasedBuffer.alBuffer != buffers[i] ) {
+                        if( !ignoreBufferInconsistency ) {
+                            alFramesAvail.dump(System.err, "Avail-deq02-post");
+                            alFramesPlaying.dump(System.err, "Playi-deq02-post");
+                            throw new InternalError("Buffer name mismatch: dequeued: "+buffers[i]+", released "+releasedBuffer+", "+this);
+                        }
+                    }
+                }
+                alBufferBytesQueued -= releasedBuffer.getByteSize();
+                if( !alFramesAvail.put(releasedBuffer) ) {
+                    throw new InternalError("Internal Error: "+this);
+                }
+                if(DEBUG_TRACE) {
+                    System.err.println("<< [al "+buffers[i]+", q "+releasedBuffer.alBuffer+"] <- "+shortString()+" @ "+getThreadName());
+                }
+            }
+        }
+        return releaseBufferCount;
+    }
+    private final void dequeueForceAll() {
+        if(DEBUG_TRACE) {
+            System.err.println("<   _FLUSH_  <- "+shortString()+" @ "+getThreadName());
+        }
+        final int[] val=new int[1];
+        al.alSourcei(alSource[0], AL.AL_BUFFER, 0); // explicit force zero buffer!
+        if(DEBUG_TRACE) {
+            al.alGetSourcei(alSource[0], AL.AL_BUFFERS_PROCESSED, val, 0);
+        }
+        final int alErr = al.alGetError();
+        while ( !alFramesPlaying.isEmpty() ) {
+            final ALAudioFrame releasedBuffer = alFramesPlaying.get();
+            if( null == releasedBuffer ) {
+                throw new InternalError("Internal Error: "+this);
+            }
+            alBufferBytesQueued -= releasedBuffer.getByteSize();
+            if( !alFramesAvail.put(releasedBuffer) ) {
+                throw new InternalError("Internal Error: "+this);
+            }
+        }
+        alBufferBytesQueued = 0;
+        if(DEBUG_TRACE) {
+            System.err.println("<<  _FLUSH_  [al "+val[0]+", err "+toHexString(alErr)+"] <- "+shortString()+" @ "+getThreadName());
+            Thread.dumpStack();
+        }
+    }
+
+    private final int dequeueBuffer(boolean wait, int inPTS, int inDuration) {
+        final int dequeuedBufferCount = dequeueBuffer( wait, false /* ignoreBufferInconsistency */ );
+        final ALAudioFrame currentBuffer = alFramesPlaying.peek();
+        if( null != currentBuffer ) {
+            playingPTS = currentBuffer.getPTS();
+        } else {
+            playingPTS = inPTS;
+        }
+        if( DEBUG ) {
+            if( dequeuedBufferCount > 0 ) {
+                System.err.println(getThreadName()+": ALAudioSink: Write "+inPTS+", "+inDuration+" ms, dequeued "+dequeuedBufferCount+", wait "+wait+", "+getPerfString());
+            }
+        }
+        return dequeuedBufferCount;
+    }
+
+    @Override
+    public final AudioFrame enqueueData(AudioDataFrame audioDataFrame) {
+        return enqueueData(audioDataFrame.getPTS(), audioDataFrame.getData(), audioDataFrame.getByteSize());
+    }
+
+    @Override
+    public final AudioFrame enqueueData(int pts, ByteBuffer bytes, int byteCount) {
+        if( !initialized || null == chosenFormat ) {
+            return null;
+        }
+        final ALAudioFrame alFrame;
+
+        // OpenAL consumes buffers in the background
+        // we first need to initialize the OpenAL buffers then
+        // start continuous playback.
+        lockContext();
+        try {
+            final int duration = chosenFormat.getBytesDuration(byteCount);
+            final boolean dequeueDone;
+            if( alFramesAvail.isEmpty() ) {
+                // try to dequeue first
+                dequeueDone = dequeueBuffer(false, pts, duration) > 0;
+                if( alFramesAvail.isEmpty() ) {
+                    // try to grow
+                    growBuffers();
+                }
+            } else {
+                dequeueDone = false;
+            }
+            if( !dequeueDone && alFramesPlaying.size() > 0 ) { // dequeue only possible if playing ..
+                final boolean wait = isPlayingImpl0() && alFramesAvail.isEmpty(); // possible if grow failed or already exceeds it's limit!
+                dequeueBuffer(wait, pts, duration);
+            }
+
+            alFrame = alFramesAvail.get();
+            if( null == alFrame ) {
+                alFramesAvail.dump(System.err, "Avail");
+                throw new InternalError("Internal Error: avail.get null "+alFramesAvail+", "+this);
+            }
+            alFrame.setPTS(pts);
+            alFrame.setDuration(duration);
+            alFrame.setByteSize(byteCount);
+            if( !alFramesPlaying.put( alFrame ) ) {
+                throw new InternalError("Internal Error: "+this);
+            }
+            final int[] alBufferNames = new int[] { alFrame.alBuffer };
+            if( hasSOFTBufferSamples ) {
+                final int samplesPerChannel = chosenFormat.getBytesSampleCount(byteCount) / chosenFormat.channelCount;
+                // final int samplesPerChannel = ALHelpers.bytesToSampleCount(byteCount, alChannelLayout, alSampleType);
+                alExt.alBufferSamplesSOFT(alFrame.alBuffer, chosenFormat.sampleRate, alFormat,
+                                          samplesPerChannel, alChannelLayout, alSampleType, bytes);
+            } else {
+                al.alBufferData(alFrame.alBuffer, alFormat, bytes, byteCount, chosenFormat.sampleRate);
+            }
+
+            if(DEBUG_TRACE) {
+                System.err.println(">  "+alFrame.alBuffer+" -> "+shortString()+" @ "+getThreadName());
+            }
+
+            al.alSourceQueueBuffers(alSource[0], 1, alBufferNames, 0);
+            final int alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                throw new RuntimeException(getThreadName()+": ALError "+toHexString(alErr)+" while queueing buffer "+toHexString(alBufferNames[0])+". "+this);
+            }
+            alBufferBytesQueued += byteCount;
+            enqueuedFrameCount++;
+
+            if(DEBUG_TRACE) {
+                System.err.println(">> "+alFrame.alBuffer+" -> "+shortString()+" @ "+getThreadName());
+            }
+
+            playImpl(); // continue playing, fixes issue where we ran out of enqueued data!
+        } finally {
+            unlockContext();
+        }
+        return alFrame;
+    }
+
+    @Override
+    public final boolean isPlaying() {
+        if( !initialized || null == chosenFormat ) {
+            return false;
+        }
+        if( playRequested ) {
+            lockContext();
+            try {
+                return isPlayingImpl0();
+            } finally {
+                unlockContext();
+            }
+        } else {
+            return false;
+        }
+    }
+    private final boolean isPlayingImpl0() {
+        if( playRequested ) {
+            return AL.AL_PLAYING == getSourceState(false);
+        } else {
+            return false;
+        }
+    }
+    private final int getSourceState(boolean ignoreError) {
+        final int[] val = new int[1];
+        al.alGetSourcei(alSource[0], AL.AL_SOURCE_STATE, val, 0);
+        final int alErr = al.alGetError();
+        if( AL.AL_NO_ERROR != alErr ) {
+            final String msg = getThreadName()+": ALError "+toHexString(alErr)+" while querying SOURCE_STATE. "+this;
+            if( ignoreError ) {
+                if( DEBUG ) {
+                    System.err.println(msg);
+                }
+            } else {
+                throw new RuntimeException(msg);
+            }
+        }
+        return val[0];
+    }
+
+    @Override
+    public final void play() {
+        if( !initialized || null == chosenFormat ) {
+            return;
+        }
+        playRequested = true;
+        lockContext();
+        try {
+            playImpl();
+            if( DEBUG ) {
+                System.err.println(getThreadName()+": ALAudioSink: PLAY playImpl "+(AL.AL_PLAYING == getSourceState(false))+", "+this);
+            }
+        } finally {
+            unlockContext();
+        }
+    }
+    private final void playImpl() {
+        if( playRequested && AL.AL_PLAYING != getSourceState(false) ) {
+            al.alSourcePlay(alSource[0]);
+            final int alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                throw new RuntimeException(getThreadName()+": ALError "+toHexString(alErr)+" while start playing. "+this);
+            }
+        }
+    }
+
+    @Override
+    public final void pause() {
+        if( !initialized || null == chosenFormat ) {
+            return;
+        }
+        if( playRequested ) {
+            lockContext();
+            try {
+                pauseImpl();
+                if( DEBUG ) {
+                    System.err.println(getThreadName()+": ALAudioSink: PAUSE playImpl "+(AL.AL_PLAYING == getSourceState(false))+", "+this);
+                }
+            } finally {
+                unlockContext();
+            }
+        }
+    }
+    private final void pauseImpl() {
+        if( isPlayingImpl0() ) {
+            playRequested = false;
+            al.alSourcePause(alSource[0]);
+            final int alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                throw new RuntimeException(getThreadName()+": ALError "+toHexString(alErr)+" while pausing. "+this);
+            }
+        }
+    }
+    private final void stopImpl(boolean ignoreError) {
+        if( AL.AL_STOPPED != getSourceState(ignoreError) ) {
+            playRequested = false;
+            al.alSourceStop(alSource[0]);
+            final int alErr = al.alGetError();
+            if( AL.AL_NO_ERROR != alErr ) {
+                final String msg = "ALError "+toHexString(alErr)+" while stopping. "+this;
+                if( ignoreError ) {
+                    if( DEBUG ) {
+                        System.err.println(getThreadName()+": "+msg);
+                    }
+                } else {
+                    throw new RuntimeException(getThreadName()+": ALError "+toHexString(alErr)+" while stopping. "+this);
+                }
+            }
+        }
+    }
+
+    @Override
+    public final float getPlaySpeed() { return playSpeed; }
+
+    @Override
+    public final boolean setPlaySpeed(float rate) {
+        if( !initialized || null == chosenFormat ) {
+            return false;
+        }
+        lockContext();
+        try {
+            if( Math.abs(1.0f - rate) < 0.01f ) {
+                rate = 1.0f;
+            }
+            if( 0.5f <= rate && rate <= 2.0f ) { // OpenAL limits
+                playSpeed = rate;
+                al.alSourcef(alSource[0], AL.AL_PITCH, playSpeed);
+                return true;
+            }
+        } finally {
+            unlockContext();
+        }
+        return false;
+    }
+
+    @Override
+    public final float getVolume() {
+        return volume;
+    }
+
+    @Override
+    public final boolean setVolume(float v) {
+        if( !initialized || null == chosenFormat ) {
+            return false;
+        }
+        lockContext();
+        try {
+            if( Math.abs(v) < 0.01f ) {
+                v = 0.0f;
+            } else if( Math.abs(1.0f - v) < 0.01f ) {
+                v = 1.0f;
+            }
+            if( 0.0f <= v && v <= 1.0f ) { // OpenAL limits
+                volume = v;
+                al.alSourcef(alSource[0], AL.AL_GAIN, v);
+                return true;
+            }
+        } finally {
+            unlockContext();
+        }
+        return false;
+    }
+
+    @Override
+    public final void flush() {
+        if( !initialized || null == chosenFormat ) {
+            return;
+        }
+        lockContext();
+        try {
+            // pauseImpl();
+            stopImpl(false);
+            // Redundant: dequeueBuffer( false /* wait */, true /* ignoreBufferInconsistency */);
+            dequeueForceAll();
+            if( alBufferNames.length != alFramesAvail.size() || alFramesPlaying.size() != 0 ) {
+                throw new InternalError("XXX: "+this);
+            }
+            if( DEBUG ) {
+                System.err.println(getThreadName()+": ALAudioSink: FLUSH playImpl "+(AL.AL_PLAYING == getSourceState(false))+", "+this);
+            }
+        } finally {
+            unlockContext();
+        }
+    }
+
+    @Override
+    public final int getEnqueuedFrameCount() {
+        return enqueuedFrameCount;
+    }
+
+    @Override
+    public final int getFrameCount() {
+        return null != alBufferNames ? alBufferNames.length : 0;
+    }
+
+    @Override
+    public final int getQueuedFrameCount() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        return alFramesPlaying.size();
+    }
+
+    @Override
+    public final int getFreeFrameCount() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        return alFramesAvail.size();
+    }
+
+    @Override
+    public final int getQueuedByteCount() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        return alBufferBytesQueued;
+    }
+
+    @Override
+    public final int getQueuedTime() {
+        if( !initialized || null == chosenFormat ) {
+            return 0;
+        }
+        return chosenFormat.getBytesDuration(alBufferBytesQueued);
+    }
+
+    @Override
+    public final int getPTS() { return playingPTS; }
+
+    private static final String toHexString(int v) { return "0x"+Integer.toHexString(v); }
+    private static final String getThreadName() { return Thread.currentThread().getName(); }
+}
diff --git a/src/jogl/classes/jogamp/opengl/openal/av/ALDummyUsage.java b/src/jogl/classes/jogamp/opengl/openal/av/ALDummyUsage.java
new file mode 100644
index 000000000..2c1dfa237
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/openal/av/ALDummyUsage.java
@@ -0,0 +1,16 @@
+package jogamp.opengl.openal.av;
+
+import com.jogamp.openal.AL;
+import com.jogamp.openal.JoalVersion;
+
+/** 
+ * Demo JOAL usage w/ av dependency, i.e. FFMPEGMediaPlayer ..
+ */
+public class ALDummyUsage {
+    static AL al;
+    
+    public static void main(String args[]) {
+        System.err.println("JOGL> Hello JOAL");
+        System.err.println("JOAL: "+JoalVersion.getInstance().toString());
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/shader/texture01_xxx.fp b/src/jogl/classes/jogamp/opengl/shader/texture01_xxx.fp
new file mode 100644
index 000000000..8b30b65f9
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/shader/texture01_xxx.fp
@@ -0,0 +1,19 @@
+// Copyright 2012 JogAmp Community. All rights reserved.
+
+#if __VERSION__ >= 130
+  #define varying in
+  out vec4 mgl_FragColor;
+  #define texture2D texture
+#else
+  #define mgl_FragColor gl_FragColor   
+#endif
+
+varying  vec2          mgl_texCoord;
+
+uniform sampler2D      mgl_Texture0;
+
+void main (void)
+{
+  mgl_FragColor = texture2D(mgl_Texture0, mgl_texCoord);
+}
+
diff --git a/src/jogl/classes/jogamp/opengl/shader/texture01_xxx.vp b/src/jogl/classes/jogamp/opengl/shader/texture01_xxx.vp
new file mode 100644
index 000000000..d9ef6b493
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/shader/texture01_xxx.vp
@@ -0,0 +1,19 @@
+// Copyright 2012 JogAmp Community. All rights reserved.
+
+#if __VERSION__ >= 130
+  #define attribute in
+  #define varying out
+#endif
+
+uniform   mat4    mgl_PMVMatrix[2];
+
+attribute vec4    mgl_Vertex;
+attribute vec4    mgl_MultiTexCoord;
+
+varying   vec2    mgl_texCoord;
+
+void main(void)
+{
+  mgl_texCoord = mgl_MultiTexCoord.st;
+  gl_Position = mgl_PMVMatrix[0] * mgl_PMVMatrix[1] * mgl_Vertex;
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/GLArrayHandler.java b/src/jogl/classes/jogamp/opengl/util/GLArrayHandler.java
index 22690b06d..810a9286b 100644
--- a/src/jogl/classes/jogamp/opengl/util/GLArrayHandler.java
+++ b/src/jogl/classes/jogamp/opengl/util/GLArrayHandler.java
@@ -31,41 +31,52 @@ package jogamp.opengl.util;
 import javax.media.opengl.*;
 
 /**
- * Handles consistency of buffer data and array state.
- * Implementations shall consider buffer types (VBO, ..), interleaved, etc.
- * They also need to consider array state types, i.e. fixed function or GLSL.
+ * Handles consistency of buffer data and array state.<br/>
+ * Implementations shall consider buffer types (VBO, ..), interleaved, etc.<br/>
+ * They also need to consider array state types, i.e. fixed function or GLSL.<br/>
  */
 public interface GLArrayHandler {
 
+
   /**
-   * Implementation shall associate the data with the array
-   * and synchronize the data with the GPU.
-   * 
+   * if <code>bind</code> is true and the data uses VBO,
+   * the latter will be bound and data written to the GPU if required.
+   * <p>
+   * If  <code>bind</code> is false and the data uses VBO,
+   * the latter will be unbound.
+   * </p>
+   *
    * @param gl current GL object
-   * @param enable true if array data shall be valid, otherwise false.
-   * @param ext extension object allowing passing of an implementation detail 
+   * @param bind true if VBO shall be bound and data written,
+   *        otherwise clear VBO binding.
+   * @return true if data uses VBO and action was performed, otherwise false
    */
-  public void syncData(GL gl, boolean enable, Object ext);
-  
+  public boolean bindBuffer(GL gl, boolean bind);
+
   /**
    * Implementation shall enable or disable the array state.
-   * 
+   * <p>
+   * Before enabling the array state,
+   * implementation shall synchronize the data with the GPU
+   * and associate the data with the array.
+   * </p>
+   *
    * @param gl current GL object
    * @param enable true if array shall be enabled, otherwise false.
-   * @param ext extension object allowing passing of an implementation detail 
+   * @param ext extension object allowing passing of an implementation detail
    */
   public void enableState(GL gl, boolean enable, Object ext);
-  
+
   /**
-   * Supporting interleaved arrays, where sub handlers may handle 
+   * Supporting interleaved arrays, where sub handlers may handle
    * the array state and the <i>master</i> handler the buffer consistency.
-   *   
+   *
    * @param handler the sub handler
    * @throws UnsupportedOperationException if this array handler does not support interleaved arrays
    */
   public void addSubHandler(GLArrayHandlerFlat handler) throws UnsupportedOperationException;
 
   public void setSubArrayVBOName(int vboName);
-  
+
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerFlat.java b/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerFlat.java
index dca9129ad..179142fee 100644
--- a/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerFlat.java
+++ b/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerFlat.java
@@ -39,23 +39,21 @@ public interface GLArrayHandlerFlat {
 
   /**
    * Implementation shall associate the data with the array
-   * 
+   *
    * @param gl current GL object
-   * @param enable true if array data shall be valid, otherwise false.
-   * @param force true force data association, bypassing optimization
-   * @param ext extension object allowing passing of an implementation detail 
+   * @param ext extension object allowing passing of an implementation detail
    */
-  public void syncData(GL gl, boolean enable, boolean force, Object ext);
-  
+  public void syncData(GL gl, Object ext);
+
   /**
    * Implementation shall enable or disable the array state.
-   * 
+   *
    * @param gl current GL object
    * @param enable true if array shall be enabled, otherwise false.
-   * @param ext extension object allowing passing of an implementation detail 
+   * @param ext extension object allowing passing of an implementation detail
    */
-  public void enableState(GL gl, boolean enable, Object ext);  
-  
+  public void enableState(GL gl, boolean enable, Object ext);
+
   public GLArrayDataWrapper getData();
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerInterleaved.java b/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerInterleaved.java
index d31b41582..89e01edd8 100644
--- a/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerInterleaved.java
+++ b/src/jogl/classes/jogamp/opengl/util/GLArrayHandlerInterleaved.java
@@ -28,8 +28,6 @@
 
 package jogamp.opengl.util;
 
-
-import java.nio.Buffer;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -38,61 +36,46 @@ import javax.media.opengl.GL;
 import com.jogamp.opengl.util.GLArrayDataEditable;
 
 /**
- * Interleaved fixed function arrays, i.e. where this buffer data 
- * represents many arrays. 
+ * Interleaved fixed function arrays, i.e. where this buffer data
+ * represents many arrays.
  */
-public class GLArrayHandlerInterleaved implements GLArrayHandler {
-  private GLArrayDataEditable ad;
-  private List<GLArrayHandlerFlat> subArrays = new ArrayList<GLArrayHandlerFlat>();
+public class GLArrayHandlerInterleaved extends GLVBOArrayHandler {
+  private final List<GLArrayHandlerFlat> subArrays = new ArrayList<GLArrayHandlerFlat>();
 
   public GLArrayHandlerInterleaved(GLArrayDataEditable ad) {
-    this.ad = ad;
+    super(ad);
   }
-  
+
+  @Override
   public final void setSubArrayVBOName(int vboName) {
       for(int i=0; i<subArrays.size(); i++) {
           subArrays.get(i).getData().setVBOName(vboName);
-      }      
+      }
   }
-  
+
+  @Override
   public final void addSubHandler(GLArrayHandlerFlat handler) {
       subArrays.add(handler);
   }
 
-  private final void syncSubData(GL gl, boolean enable, boolean force, Object ext) {
+  private final void syncSubData(GL gl, Object ext) {
       for(int i=0; i<subArrays.size(); i++) {
-          subArrays.get(i).syncData(gl, enable, force, ext);
-      }      
-  }  
-  
-  public final void syncData(GL gl, boolean enable, Object ext) {
-    if(enable) {
-        final Buffer buffer = ad.getBuffer();
+          subArrays.get(i).syncData(gl, ext);
+      }
+  }
 
-        if(ad.isVBO()) {
-            // always bind and refresh the VBO mgr, 
-            // in case more than one gl*Pointer objects are in use
-            gl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
-            if(!ad.isVBOWritten()) {
-                if(null!=buffer) {
-                    gl.glBufferData(ad.getVBOTarget(), buffer.limit() * ad.getComponentSizeInBytes(), buffer, ad.getVBOUsage());
-                }
-                ad.setVBOWritten(true);
-            }
-        }
-        syncSubData(gl, true, true, ext);
-    } else {
-        syncSubData(gl, false, true, ext);
-        if(ad.isVBO()) {
-            gl.glBindBuffer(ad.getVBOTarget(), 0);
+  @Override
+  public final void enableState(GL gl, boolean enable, Object ext) {
+    if(enable) {
+        final boolean vboBound = bindBuffer(gl, true);
+        syncSubData(gl, ext);
+        if(vboBound) {
+            bindBuffer(gl, false);
         }
     }
-  }
-  
-  public final void enableState(GL gl, boolean enable, Object ext) {
     for(int i=0; i<subArrays.size(); i++) {
         subArrays.get(i).enableState(gl, enable, ext);
-    }      
+    }
   }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/GLDataArrayHandler.java b/src/jogl/classes/jogamp/opengl/util/GLDataArrayHandler.java
index 6c8e2e762..8a587980d 100644
--- a/src/jogl/classes/jogamp/opengl/util/GLDataArrayHandler.java
+++ b/src/jogl/classes/jogamp/opengl/util/GLDataArrayHandler.java
@@ -28,55 +28,43 @@
 
 package jogamp.opengl.util;
 
-import javax.media.opengl.*;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLException;
 
-import com.jogamp.opengl.util.*;
+import com.jogamp.opengl.util.GLArrayDataEditable;
 
-import java.nio.*;
 
 /**
- * Used for pure VBO data arrays, i.e. where the buffer data 
- * does not represents a specific array name. 
+ * Used for pure VBO data arrays, i.e. where the buffer data
+ * does not represents a specific array name.
  */
-public class GLDataArrayHandler implements GLArrayHandler {
-  private GLArrayDataEditable ad;
+public class GLDataArrayHandler extends GLVBOArrayHandler {
 
   public GLDataArrayHandler(GLArrayDataEditable ad) {
-    this.ad = ad;
+    super(ad);
   }
 
+  @Override
   public final void setSubArrayVBOName(int vboName) {
       throw new UnsupportedOperationException();
   }
-  
+
+  @Override
   public final void addSubHandler(GLArrayHandlerFlat handler) {
       throw new UnsupportedOperationException();
   }
-  
-  public final void syncData(GL gl, boolean enable, Object ext) {
-    if(!ad.isVBO()) {
-        // makes no sense otherwise
-        throw new GLException("GLDataArrayHandler can only handle VBOs.");
-    }
-    if(enable) {
-        Buffer buffer = ad.getBuffer();
 
-        // always bind and refresh the VBO mgr, 
-        // in case more than one gl*Pointer objects are in use
-        gl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
-        if(!ad.isVBOWritten()) {
-            if(null!=buffer) {
-                gl.glBufferData(ad.getVBOTarget(), buffer.limit() * ad.getComponentSizeInBytes(), buffer, ad.getVBOUsage());
-            }
-            ad.setVBOWritten(true);
+  @Override
+  public final void enableState(GL gl, boolean enable, Object ext) {
+    if(enable) {
+        if(!ad.isVBO()) {
+            // makes no sense otherwise
+            throw new GLException("GLDataArrayHandler can only handle VBOs.");
         }
-    } else {
-        gl.glBindBuffer(ad.getVBOTarget(), 0);
-    }      
-  }
-  
-  public final void enableState(GL gl, boolean enable, Object ext) { 
-      // no array association
+        bindBuffer(gl, true);
+        bindBuffer(gl, false);
+    }
+    // no array association
   }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandler.java b/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandler.java
index d8939dc0f..7f7a99a2d 100644
--- a/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandler.java
+++ b/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandler.java
@@ -28,47 +28,36 @@
 
 package jogamp.opengl.util;
 
-import javax.media.opengl.*;
-import javax.media.opengl.fixedfunc.*;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLException;
+import javax.media.opengl.fixedfunc.GLPointerFunc;
 
 import com.jogamp.opengl.util.GLArrayDataEditable;
 
-import java.nio.*;
-
 /**
- * Used for 1:1 fixed function arrays, i.e. where the buffer data 
- * represents this array only. 
+ * Used for 1:1 fixed function arrays, i.e. where the buffer data
+ * represents this array only.
  */
-public class GLFixedArrayHandler implements GLArrayHandler {
-  private GLArrayDataEditable ad;
-
+public class GLFixedArrayHandler extends GLVBOArrayHandler {
   public GLFixedArrayHandler(GLArrayDataEditable ad) {
-    this.ad = ad;
+    super(ad);
   }
-  
+
+  @Override
   public final void setSubArrayVBOName(int vboName) {
       throw new UnsupportedOperationException();
   }
-  
+
+  @Override
   public final void addSubHandler(GLArrayHandlerFlat handler) {
       throw new UnsupportedOperationException();
   }
-  
-  public final void syncData(GL gl, boolean enable, Object ext) {
+
+  @Override
+  public final void enableState(GL gl, boolean enable, Object ext) {
+    final GLPointerFunc glp = gl.getGL2ES1();
     if(enable) {
-        final Buffer buffer = ad.getBuffer();
-        if(ad.isVBO()) {
-            // always bind and refresh the VBO mgr, 
-            // in case more than one gl*Pointer objects are in use
-            gl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
-            if(!ad.isVBOWritten()) {
-                if(null!=buffer) {
-                    gl.glBufferData(ad.getVBOTarget(), buffer.limit() * ad.getComponentSizeInBytes(), buffer, ad.getVBOUsage());
-                }
-                ad.setVBOWritten(true);
-            }
-        }
-        final GLPointerFunc glp = gl.getGL2ES1();
+        final boolean vboBound = bindBuffer(gl, true);
         switch(ad.getIndex()) {
             case GLPointerFunc.GL_VERTEX_ARRAY:
                 glp.glVertexPointer(ad);
@@ -83,17 +72,12 @@ public class GLFixedArrayHandler implements GLArrayHandler {
                 glp.glTexCoordPointer(ad);
                 break;
             default:
-                throw new GLException("invalid glArrayIndex: "+ad.getIndex()+":\n\t"+ad); 
+                throw new GLException("invalid glArrayIndex: "+ad.getIndex()+":\n\t"+ad);
         }
-    } else if(ad.isVBO()) {
-        gl.glBindBuffer(ad.getVBOTarget(), 0);
-    }
-  }
-  
-  public final void enableState(GL gl, boolean enable, Object ext) {
-    final GLPointerFunc glp = gl.getGL2ES1();
-    if(enable) {
-        glp.glEnableClientState(ad.getIndex());        
+        if(vboBound) {
+            bindBuffer(gl, false);
+        }
+        glp.glEnableClientState(ad.getIndex());
     } else {
         glp.glDisableClientState(ad.getIndex());
     }
diff --git a/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandlerFlat.java b/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandlerFlat.java
index 2937cc720..acec0510f 100644
--- a/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandlerFlat.java
+++ b/src/jogl/classes/jogamp/opengl/util/GLFixedArrayHandlerFlat.java
@@ -35,7 +35,7 @@ import javax.media.opengl.fixedfunc.GLPointerFunc;
 import com.jogamp.opengl.util.GLArrayDataWrapper;
 
 /**
- * Used for interleaved fixed function arrays, i.e. where the buffer data itself is handled 
+ * Used for interleaved fixed function arrays, i.e. where the buffer data itself is handled
  * separately and interleaves many arrays.
  */
 public class GLFixedArrayHandlerFlat implements GLArrayHandlerFlat {
@@ -45,36 +45,37 @@ public class GLFixedArrayHandlerFlat implements GLArrayHandlerFlat {
     this.ad = ad;
   }
 
+  @Override
   public GLArrayDataWrapper getData() {
       return ad;
   }
-  
-  public final void syncData(GL gl, boolean enable, boolean force, Object ext) {
-    if(enable) {
-        final GLPointerFunc glp = gl.getGL2ES1();
-        switch(ad.getIndex()) {
-            case GLPointerFunc.GL_VERTEX_ARRAY:
-                glp.glVertexPointer(ad);
-                break;
-            case GLPointerFunc.GL_NORMAL_ARRAY:
-                glp.glNormalPointer(ad);
-                break;
-            case GLPointerFunc.GL_COLOR_ARRAY:
-                glp.glColorPointer(ad);
-                break;
-            case GLPointerFunc.GL_TEXTURE_COORD_ARRAY:
-                glp.glTexCoordPointer(ad);
-                break;
-            default:
-                throw new GLException("invalid glArrayIndex: "+ad.getIndex()+":\n\t"+ad); 
-        }
+
+  @Override
+  public final void syncData(GL gl, Object ext) {
+    final GLPointerFunc glp = gl.getGL2ES1();
+    switch(ad.getIndex()) {
+        case GLPointerFunc.GL_VERTEX_ARRAY:
+            glp.glVertexPointer(ad);
+            break;
+        case GLPointerFunc.GL_NORMAL_ARRAY:
+            glp.glNormalPointer(ad);
+            break;
+        case GLPointerFunc.GL_COLOR_ARRAY:
+            glp.glColorPointer(ad);
+            break;
+        case GLPointerFunc.GL_TEXTURE_COORD_ARRAY:
+            glp.glTexCoordPointer(ad);
+            break;
+        default:
+            throw new GLException("invalid glArrayIndex: "+ad.getIndex()+":\n\t"+ad);
     }
   }
 
+  @Override
   public final void enableState(GL gl, boolean enable, Object ext) {
     final GLPointerFunc glp = gl.getGL2ES1();
     if(enable) {
-        glp.glEnableClientState(ad.getIndex());        
+        glp.glEnableClientState(ad.getIndex());
     } else {
         glp.glDisableClientState(ad.getIndex());
     }
diff --git a/src/jogl/classes/jogamp/opengl/util/GLVBOArrayHandler.java b/src/jogl/classes/jogamp/opengl/util/GLVBOArrayHandler.java
new file mode 100644
index 000000000..5198cacfa
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/GLVBOArrayHandler.java
@@ -0,0 +1,71 @@
+/**
+ * Copyright 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl.util;
+
+import java.nio.Buffer;
+
+import javax.media.opengl.GL;
+
+import com.jogamp.opengl.util.GLArrayDataEditable;
+
+/**
+ * Interleaved fixed function arrays, i.e. where this buffer data
+ * represents many arrays.
+ */
+public abstract class GLVBOArrayHandler implements GLArrayHandler {
+  protected GLArrayDataEditable ad;
+
+  public GLVBOArrayHandler(GLArrayDataEditable ad) {
+    this.ad = ad;
+  }
+
+  @Override
+  public final boolean bindBuffer(GL gl, boolean bind) {
+    if( !ad.isVBO() ) {
+        return false;
+    }
+    if(bind) {
+        // always bind and refresh the VBO mgr,
+        // in case more than one gl*Pointer objects are in use
+        gl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
+        if(!ad.isVBOWritten()) {
+            final Buffer buffer = ad.getBuffer();
+            if(null!=buffer) {
+                gl.glBufferData(ad.getVBOTarget(), buffer.limit() * ad.getComponentSizeInBytes(), buffer, ad.getVBOUsage());
+            }
+            ad.setVBOWritten(true);
+        }
+    } else {
+        gl.glBindBuffer(ad.getVBOTarget(), 0);
+    }
+    return true;
+  }
+
+}
+
diff --git a/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java b/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java
index 31f13297b..c39b78bb8 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -44,43 +44,40 @@ import jogamp.opengl.egl.EGLExt;
 public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
     final protected TextureType texType;
     final protected boolean useKHRSync;
-    
+
     public enum TextureType {
-        GL(0), KHRImage(1); 
-        
+        GL(0), KHRImage(1);
+
         public final int id;
 
         TextureType(int id){
             this.id = id;
         }
-    }    
-    
+    }
+
     public static class EGLTextureFrame extends TextureSequence.TextureFrame {
-        
+
         public EGLTextureFrame(Buffer clientBuffer, Texture t, long khrImage, long khrSync) {
             super(t);
             this.clientBuffer = clientBuffer;
             this.image = khrImage;
             this.sync = khrSync;
         }
-        
+
         public final Buffer getClientBuffer() { return clientBuffer; }
-        public final long getImage() { return image; }        
+        public final long getImage() { return image; }
         public final long getSync() { return sync; }
-        
+
+        @Override
         public String toString() {
-            return "EGLTextureFrame[" + texture + ", img "+ image + ", sync "+ sync+", clientBuffer "+clientBuffer+"]";
+            return "EGLTextureFrame[pts " + pts + " ms, l " + duration + " ms, texID "+ texture.getTextureObject() + ", img "+ image + ", sync "+ sync+", clientBuffer "+clientBuffer+"]";
         }
         protected final Buffer clientBuffer;
         protected final long image;
         protected final long sync;
     }
 
-    
-    protected EGLMediaPlayerImpl() {
-        this(TextureType.GL, false);
-    }
-    
+
     protected EGLMediaPlayerImpl(TextureType texType, boolean useKHRSync) {
         super();
         this.texType = texType;
@@ -88,36 +85,36 @@ public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
     }
 
     @Override
-    protected TextureSequence.TextureFrame createTexImage(GL gl, int idx, int[] tex) {
-        final Texture texture = super.createTexImageImpl(gl, idx, tex, width, height, false);
+    protected TextureSequence.TextureFrame createTexImage(GL gl, int texName) {
+        final Texture texture = super.createTexImageImpl(gl, texName, width, height);
         final Buffer clientBuffer;
         final long image;
         final long sync;
-        final boolean eglUsage = TextureType.KHRImage == texType || useKHRSync ; 
+        final boolean eglUsage = TextureType.KHRImage == texType || useKHRSync ;
         final EGLContext eglCtx;
         final EGLExt eglExt;
         final EGLDrawable eglDrawable;
-        
+
         if(eglUsage) {
             eglCtx = (EGLContext) gl.getContext();
             eglExt = eglCtx.getEGLExt();
-            eglDrawable = (EGLDrawable) eglCtx.getGLDrawable();            
+            eglDrawable = (EGLDrawable) eglCtx.getGLDrawable();
         } else {
             eglCtx = null;
             eglExt = null;
             eglDrawable = null;
         }
-        
+
         if(TextureType.KHRImage == texType) {
             IntBuffer nioTmp = Buffers.newDirectIntBuffer(1);
             // create EGLImage from texture
             clientBuffer = null; // FIXME
             nioTmp.put(0, EGL.EGL_NONE);
-            image =  eglExt.eglCreateImageKHR( eglDrawable.getDisplay(), eglCtx.getHandle(),
+            image =  eglExt.eglCreateImageKHR( eglDrawable.getNativeSurface().getDisplayHandle(), eglCtx.getHandle(),
                                                EGLExt.EGL_GL_TEXTURE_2D_KHR,
                                                clientBuffer, nioTmp);
             if (0==image) {
-                throw new RuntimeException("EGLImage creation failed: "+EGL.eglGetError()+", ctx "+eglCtx+", tex "+tex[idx]+", err "+toHexString(EGL.eglGetError()));
+                throw new RuntimeException("EGLImage creation failed: "+EGL.eglGetError()+", ctx "+eglCtx+", tex "+texName+", err "+toHexString(EGL.eglGetError()));
             }
         } else {
             clientBuffer = null;
@@ -125,12 +122,12 @@ public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
         }
 
         if(useKHRSync) {
-            int[] tmp = new int[1];
+            IntBuffer tmp = Buffers.newDirectIntBuffer(1);
             // Create sync object so that we can be sure that gl has finished
             // rendering the EGLImage texture before we tell OpenMAX to fill
             // it with a new frame.
-            tmp[0] = EGL.EGL_NONE;
-            sync = eglExt.eglCreateSyncKHR(eglDrawable.getDisplay(), EGLExt.EGL_SYNC_FENCE_KHR, tmp, 0);
+            tmp.put(0, EGL.EGL_NONE);
+            sync = eglExt.eglCreateSyncKHR(eglDrawable.getNativeSurface().getDisplayHandle(), EGLExt.EGL_SYNC_FENCE_KHR, tmp);
             if (0==sync) {
                 throw new RuntimeException("EGLSync creation failed: "+EGL.eglGetError()+", ctx "+eglCtx+", err "+toHexString(EGL.eglGetError()));
             }
@@ -139,31 +136,31 @@ public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
         }
         return new EGLTextureFrame(clientBuffer, texture, image, sync);
     }
-    
+
     @Override
-    protected void destroyTexImage(GL gl, TextureSequence.TextureFrame imgTex) {
-        final boolean eglUsage = TextureType.KHRImage == texType || useKHRSync ; 
+    protected void destroyTexFrame(GL gl, TextureSequence.TextureFrame frame) {
+        final boolean eglUsage = TextureType.KHRImage == texType || useKHRSync ;
         final EGLContext eglCtx;
         final EGLExt eglExt;
         final EGLDrawable eglDrawable;
-        
+
         if(eglUsage) {
             eglCtx = (EGLContext) gl.getContext();
             eglExt = eglCtx.getEGLExt();
-            eglDrawable = (EGLDrawable) eglCtx.getGLDrawable();            
+            eglDrawable = (EGLDrawable) eglCtx.getGLDrawable();
         } else {
             eglCtx = null;
             eglExt = null;
             eglDrawable = null;
         }
-        final EGLTextureFrame eglTex = (EGLTextureFrame) imgTex;
-        
+        final EGLTextureFrame eglTex = (EGLTextureFrame) frame;
+
         if(0!=eglTex.getImage()) {
-            eglExt.eglDestroyImageKHR(eglDrawable.getDisplay(), eglTex.getImage());
+            eglExt.eglDestroyImageKHR(eglDrawable.getNativeSurface().getDisplayHandle(), eglTex.getImage());
         }
         if(0!=eglTex.getSync()) {
-            eglExt.eglDestroySyncKHR(eglDrawable.getDisplay(), eglTex.getSync());
+            eglExt.eglDestroySyncKHR(eglDrawable.getNativeSurface().getDisplayHandle(), eglTex.getSync());
         }
-        super.destroyTexImage(gl, imgTex);
+        super.destroyTexFrame(gl, frame);
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
index d3d45e692..7cea51dc8 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/GLMediaPlayerImpl.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -28,331 +28,670 @@
 package jogamp.opengl.util.av;
 
 import java.io.IOException;
-import java.net.URLConnection;
+import java.net.URI;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.Map;
 
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLES2;
 import javax.media.opengl.GLException;
+import javax.media.opengl.GLProfile;
+
+import jogamp.opengl.Debug;
 
+import com.jogamp.common.net.URIQueryProps;
+import com.jogamp.common.os.Platform;
+import com.jogamp.common.util.LFRingbuffer;
+import com.jogamp.common.util.Ringbuffer;
+import com.jogamp.opengl.GLExtensions;
+import com.jogamp.opengl.util.TimeFrameI;
+import com.jogamp.opengl.util.av.AudioSink;
 import com.jogamp.opengl.util.av.GLMediaPlayer;
+import com.jogamp.opengl.util.glsl.ShaderCode;
 import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureSequence;
+import com.jogamp.opengl.util.texture.TextureSequence.TextureFrame;
 
 /**
  * After object creation an implementation may customize the behavior:
  * <ul>
- *   <li>{@link #setTextureCount(int)}</li>
+ *   <li>{@link #setDesTextureCount(int)}</li>
  *   <li>{@link #setTextureTarget(int)}</li>
  *   <li>{@link EGLMediaPlayerImpl#setEGLTexImageAttribs(boolean, boolean)}.</li>
  * </ul>
- * 
+ *
  * <p>
  * See {@link GLMediaPlayer}.
  * </p>
  */
 public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
+    private static final int STREAM_WORKER_DELAY = Debug.getIntProperty("jogl.debug.GLMediaPlayer.StreamWorker.delay", false, 0);
 
     protected static final String unknown = "unknown";
 
-    protected State state;
+    protected volatile State state;
+    private final Object stateLock = new Object();
+
     protected int textureCount;
     protected int textureTarget;
     protected int textureFormat;
+    protected int textureInternalFormat;
     protected int textureType;
     protected int texUnit;
-    
-    
+
+
     protected int[] texMinMagFilter = { GL.GL_NEAREST, GL.GL_NEAREST };
     protected int[] texWrapST = { GL.GL_CLAMP_TO_EDGE, GL.GL_CLAMP_TO_EDGE };
-    
-    protected URLConnection urlConn = null;
-    
-    protected float playSpeed = 1.0f;
-    
-    /** Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+
+    /** User requested URI stream location. */
+    protected URI streamLoc = null;
+    /**
+     * In case {@link #streamLoc} is a {@link GLMediaPlayer#CameraInputScheme},
+     * {@link #cameraPath} holds the URI's path portion
+     * as parsed in {@link #initStream(URI, int, int, int)}.
+     * @see #cameraProps
+     */
+    protected String cameraPath = null;
+    /** Optional camera properties, see {@link #cameraPath}. */
+    protected Map<String, String> cameraProps = null;
+
+    protected volatile float playSpeed = 1.0f;
+    protected float audioVolume = 1.0f;
+
+    /** Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
+    protected int vid = GLMediaPlayer.STREAM_ID_AUTO;
+    /** Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
+    protected int aid = GLMediaPlayer.STREAM_ID_AUTO;
+    /** Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected int width = 0;
-    /** Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected int height = 0;
-    /** Video fps. Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Video avg. fps. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected float fps = 0;
-    /** Stream bps. Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Video avg. frame duration in ms. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
+    protected float frame_duration = 0f;
+    /** Stream bps. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected int bps_stream = 0;
-    /** Video bps. Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Video bps. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected int bps_video = 0;
-    /** Audio bps. Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Audio bps. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected int bps_audio = 0;
-    /** In frames. Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
-    protected int totalFrames = 0;
-    /** In ms. Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** In frames. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
+    protected int videoFrames = 0;
+    /** In frames. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
+    protected int audioFrames = 0;
+    /** In ms. Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected int duration = 0;
-    /** Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected String acodec = unknown;
-    /** Shall be set by the {@link #initGLStreamImpl(GL, int[])} method implementation. */
+    /** Shall be set by the {@link #initStreamImpl(int, int)} method implementation. */
     protected String vcodec = unknown;
-    
-    protected int frameNumber = 0;
-    
-    protected TextureSequence.TextureFrame[] texFrames = null;
-    protected HashMap<Integer, TextureSequence.TextureFrame> texFrameMap = new HashMap<Integer, TextureSequence.TextureFrame>();
-    private ArrayList<GLMediaEventListener> eventListeners = new ArrayList<GLMediaEventListener>();
+
+    protected volatile int decodedFrameCount = 0;
+    protected int presentedFrameCount = 0;
+    protected int displayedFrameCount = 0;
+    protected volatile int video_pts_last = 0;
+
+    /**
+     * Help detect EOS, limit is {@link #MAX_FRAMELESS_MS_UNTIL_EOS}.
+     * To be used either by getNextTexture(..) or StreamWorker for audio-only.
+     */
+    private int nullFrameCount = 0;
+    private int maxNullFrameCountUntilEOS = 0;
+    /**
+     * Help detect EOS, limit {@value} milliseconds without a valid frame.
+     */
+    private static final int MAX_FRAMELESS_MS_UNTIL_EOS = 5000;
+    private static final int MAX_FRAMELESS_UNTIL_EOS_DEFAULT =  MAX_FRAMELESS_MS_UNTIL_EOS / 30; // default value assuming 30fps
+
+    /** See {@link #getAudioSink()}. Set by implementation if used from within {@link #initStreamImpl(int, int)}! */
+    protected AudioSink audioSink = null;
+    protected boolean audioSinkPlaySpeedSet = false;
+
+    /** System Clock Reference (SCR) of first audio PTS at start time. */
+    private long audio_scr_t0 = 0;
+    private boolean audioSCR_reset = true;
+
+    /** System Clock Reference (SCR) of first video frame at start time. */
+    private long video_scr_t0 = 0;
+    /** System Clock Reference (SCR) PTS offset, i.e. first video PTS at start time. */
+    private int video_scr_pts = 0;
+    /** Cumulative video pts diff. */
+    private float video_dpts_cum = 0;
+    /** Cumulative video frames. */
+    private int video_dpts_count = 0;
+    /** Number of min frame count required for video cumulative sync. */
+    private static final int VIDEO_DPTS_NUM = 20;
+    /** Cumulative coefficient, value {@value}. */
+    private static final float VIDEO_DPTS_COEFF = 0.7943282f; // (float) Math.exp(Math.log(0.01) / VIDEO_DPTS_NUM);
+    /** Maximum valid video pts diff. */
+    private static final int VIDEO_DPTS_MAX = 5000; // 5s max diff
+    /** Trigger video PTS reset with given cause as bitfield. */
+    private boolean videoSCR_reset = false;
+
+    protected TextureFrame[] videoFramesOrig = null;
+    protected Ringbuffer<TextureFrame> videoFramesFree =  null;
+    protected Ringbuffer<TextureFrame> videoFramesDecoded =  null;
+    protected volatile TextureFrame lastFrame = null;
+    /**
+     * @see #isGLOriented()
+     */
+    protected boolean isInGLOrientation = false;
+
+    private final ArrayList<GLMediaEventListener> eventListeners = new ArrayList<GLMediaEventListener>();
 
     protected GLMediaPlayerImpl() {
-        this.textureCount=3;
+        this.textureCount=0;
         this.textureTarget=GL.GL_TEXTURE_2D;
         this.textureFormat = GL.GL_RGBA;
-        this.textureType = GL.GL_UNSIGNED_BYTE;        
+        this.textureInternalFormat = GL.GL_RGBA;
+        this.textureType = GL.GL_UNSIGNED_BYTE;
         this.texUnit = 0;
         this.state = State.Uninitialized;
     }
 
     @Override
-    public void setTextureUnit(int u) { texUnit = u; }
-    
+    public final void setTextureUnit(int u) { texUnit = u; }
+
     @Override
-    public int getTextureUnit() { return texUnit; }
-    
-    protected final void setTextureCount(int textureCount) {
-        this.textureCount=textureCount;
-    }
+    public final int getTextureUnit() { return texUnit; }
+
+    @Override
+    public final int getTextureTarget() { return textureTarget; }
+
     @Override
     public final int getTextureCount() { return textureCount; }
-    
+
     protected final void setTextureTarget(int target) { textureTarget=target; }
-    protected final void setTextureFormat(int f) { textureFormat=f; }    
+    protected final void setTextureFormat(int internalFormat, int format) {
+        textureInternalFormat=internalFormat;
+        textureFormat=format;
+    }
     protected final void setTextureType(int t) { textureType=t; }
 
+    @Override
     public final void setTextureMinMagFilter(int[] minMagFilter) { texMinMagFilter[0] = minMagFilter[0]; texMinMagFilter[1] = minMagFilter[1];}
+    @Override
     public final int[] getTextureMinMagFilter() { return texMinMagFilter; }
-    
-    public final void setTextureWrapST(int[] wrapST) { texWrapST[0] = wrapST[0]; texWrapST[1] = wrapST[1];}
-    public final int[] getTextureWrapST() { return texWrapST; }
 
     @Override
-    public final TextureSequence.TextureFrame getLastTexture() throws IllegalStateException {
-        if(State.Uninitialized == state) {
-            throw new IllegalStateException("Instance not initialized: "+this);
-        }
-        return getLastTextureImpl();
-    }
-    protected abstract TextureSequence.TextureFrame getLastTextureImpl();
-    
+    public final void setTextureWrapST(int[] wrapST) { texWrapST[0] = wrapST[0]; texWrapST[1] = wrapST[1];}
     @Override
-    public final synchronized TextureSequence.TextureFrame getNextTexture(GL gl, boolean blocking) throws IllegalStateException {
-        if(State.Uninitialized == state) {
-            throw new IllegalStateException("Instance not initialized: "+this);
-        }
-        if(State.Playing == state) {
-            final TextureSequence.TextureFrame f = getNextTextureImpl(gl, blocking);
-            return f;
+    public final int[] getTextureWrapST() { return texWrapST; }
+
+    private final void checkGLInit() {
+        if(State.Uninitialized == state || State.Initialized == state ) {
+            throw new IllegalStateException("GL not initialized: "+this);
         }
-        return getLastTextureImpl();        
     }
-    protected abstract TextureSequence.TextureFrame getNextTextureImpl(GL gl, boolean blocking);
-    
+
     @Override
     public String getRequiredExtensionsShaderStub() throws IllegalStateException {
-        if(State.Uninitialized == state) {
-            throw new IllegalStateException("Instance not initialized: "+this);
-        }
+        checkGLInit();
         if(GLES2.GL_TEXTURE_EXTERNAL_OES == textureTarget) {
-            return TextureSequence.GL_OES_EGL_image_external_Required_Prelude;
+            return ShaderCode.createExtensionDirective(GLExtensions.OES_EGL_image_external, ShaderCode.ENABLE);
         }
         return "";
     }
-        
+
     @Override
     public String getTextureSampler2DType() throws IllegalStateException {
-        if(State.Uninitialized == state) {
-            throw new IllegalStateException("Instance not initialized: "+this);
-        }
+        checkGLInit();
         switch(textureTarget) {
             case GL.GL_TEXTURE_2D:
-            case GL2.GL_TEXTURE_RECTANGLE: 
+            case GL2.GL_TEXTURE_RECTANGLE:
                 return TextureSequence.sampler2D;
             case GLES2.GL_TEXTURE_EXTERNAL_OES:
                 return TextureSequence.samplerExternalOES;
             default:
-                throw new GLException("Unsuported texture target: "+toHexString(textureTarget));            
+                throw new GLException("Unsuported texture target: "+toHexString(textureTarget));
         }
     }
-    
+
     /**
      * {@inheritDoc}
-     * 
+     *
      * This implementation simply returns the build-in function name of <code>texture2D</code>,
      * if not overridden by specialization.
      */
     @Override
     public String getTextureLookupFunctionName(String desiredFuncName) throws IllegalStateException {
-        if(State.Uninitialized == state) {
-            throw new IllegalStateException("Instance not initialized: "+this);
-        }
+        checkGLInit();
         return "texture2D";
     }
-    
+
     /**
      * {@inheritDoc}
-     * 
-     * This implementation simply returns an empty string since it's using 
+     *
+     * This implementation simply returns an empty string since it's using
      * the build-in function <code>texture2D</code>,
      * if not overridden by specialization.
      */
     @Override
     public String getTextureLookupFragmentShaderImpl() throws IllegalStateException {
-        if(State.Uninitialized == state) {
-            throw new IllegalStateException("Instance not initialized: "+this);
-        }
-        return ""; 
+        checkGLInit();
+        return "";
     }
-    
+
     @Override
-    public final synchronized float getPlaySpeed() {
-        return playSpeed;
-    }
-    
+    public final int getDecodedFrameCount() { return decodedFrameCount; }
+
     @Override
-    public final synchronized void setPlaySpeed(float rate) {
-        if(State.Uninitialized != state && setPlaySpeedImpl(rate)) {
-            playSpeed = rate;
+    public final int getPresentedFrameCount() { return presentedFrameCount; }
+
+    @Override
+    public final int getVideoPTS() { return video_pts_last; }
+
+    @Override
+    public final int getAudioPTS() {
+        if( State.Uninitialized != state ) {
+            return getAudioPTSImpl();
         }
-        if(DEBUG) { System.err.println("SetPlaySpeed: "+toString()); }
+        return 0;
     }
-    protected abstract boolean setPlaySpeedImpl(float rate);
-
-    public final State start() {
-        switch(state) {
-            case Stopped:
-            case Paused:
-                if(startImpl()) {
-                    state = State.Playing;
-                }
+    /** Override if not using audioSink! */
+    protected int getAudioPTSImpl() {
+        if( null != audioSink ) {
+            return audioSink.getPTS();
+        } else {
+            return 0;
         }
-        if(DEBUG) { System.err.println("Start: "+toString()); }
-        return state;
     }
-    protected abstract boolean startImpl();
-    
-    public final State pause() {
-        if(State.Playing == state && pauseImpl()) {
-            state = State.Paused;
+
+    @Override
+    public final State getState() { return state; }
+
+    @Override
+    public final State play() {
+        synchronized( stateLock ) {
+            final State preState = state;
+            switch( state ) {
+                case Paused:
+                    if( playImpl() ) {
+                        resetAVPTS();
+                        if( null != audioSink ) {
+                            audioSink.play(); // cont. w/ new data
+                        }
+                        if( null != streamWorker ) {
+                            streamWorker.doResume();
+                        }
+                        changeState(0, State.Playing);
+                    }
+                default:
+            }
+            if(DEBUG) { System.err.println("Play: "+preState+" -> "+state+", "+toString()); }
+            return state;
         }
-        if(DEBUG) { System.err.println("Pause: "+toString()); }            
-        return state;
     }
-    protected abstract boolean pauseImpl();
-    
-    public final State stop() {
-        switch(state) {
-            case Playing:
-            case Paused:
-                if(stopImpl()) {
-                    state = State.Stopped;
+    protected abstract boolean playImpl();
+
+    @Override
+    public final State pause(boolean flush) {
+        return pauseImpl(flush, 0);
+    }
+    private final State pauseImpl(boolean flush, int event_mask) {
+        synchronized( stateLock ) {
+            final State preState = state;
+            if( State.Playing == state ) {
+                event_mask = addStateEventMask(event_mask, GLMediaPlayer.State.Paused);
+                state = State.Paused;
+                if( null != streamWorker ) {
+                    streamWorker.doPause();
+                }
+                if( flush ) {
+                    resetAVPTSAndFlush();
+                } else if( null != audioSink ) {
+                    audioSink.pause();
                 }
+                attributesUpdated( event_mask );
+                if( !pauseImpl() ) {
+                    play();
+                }
+            }
+            if(DEBUG) { System.err.println("Pause: "+preState+" -> "+state+", "+toString()); }
+            return state;
         }
-        if(DEBUG) { System.err.println("Stop: "+toString()); }
-        return state;
     }
-    protected abstract boolean stopImpl();
-    
+    protected abstract boolean pauseImpl();
+
     @Override
-    public final int getCurrentPosition() {
-        if(State.Uninitialized != state) {
-            return getCurrentPositionImpl();
+    public final State destroy(GL gl) {
+        return destroyImpl(gl, 0);
+    }
+    private final State destroyImpl(GL gl, int event_mask) {
+        synchronized( stateLock ) {
+            if( null != streamWorker ) {
+                streamWorker.doStop();
+                streamWorker = null;
+            }
+            destroyImpl(gl);
+            removeAllTextureFrames(gl);
+            textureCount=0;
+            changeState(event_mask, State.Uninitialized);
+            attachedObjects.clear();
+            return state;
         }
-        return 0;
     }
-    protected abstract int getCurrentPositionImpl();
-    
+    protected abstract void destroyImpl(GL gl);
+
+    @Override
     public final int seek(int msec) {
-        final int cp;
-        switch(state) {
-            case Stopped:
-            case Playing:
-            case Paused:
-                cp = seekImpl(msec);
-                break;
-            default:
-                cp = 0;
+        synchronized( stateLock ) {
+            final State preState = state;
+            final int pts1;
+            switch(state) {
+                case Playing:
+                case Paused:
+                    final State _state = state;
+                    state = State.Paused;
+                    if( null != streamWorker ) {
+                        streamWorker.doPause();
+                    }
+                    // Adjust target ..
+                    if( msec >= duration ) {
+                        msec = duration - (int)Math.floor(frame_duration);
+                    } else if( msec < 0 ) {
+                        msec = 0;
+                    }
+                    pts1 = seekImpl(msec);
+                    resetAVPTSAndFlush();
+                    if( null != audioSink && State.Playing == _state ) {
+                        audioSink.play(); // cont. w/ new data
+                    }
+                    if(DEBUG) {
+                        System.err.println("Seek("+msec+"): "+getPerfString());
+                    }
+                    if( null != streamWorker ) {
+                        streamWorker.doResume();
+                    }
+                    state = _state;
+                    break;
+                default:
+                    pts1 = 0;
+            }
+            if(DEBUG) { System.err.println("Seek("+msec+"): "+preState+" -> "+state+", "+toString()); }
+            return pts1;
         }
-        if(DEBUG) { System.err.println("Seek("+msec+"): "+toString()); }
-        return cp;        
     }
     protected abstract int seekImpl(int msec);
-    
-    public final State getState() { return state; }
-    
-    @Override
-    public final State initGLStream(GL gl, URLConnection urlConn) throws IllegalStateException, GLException, IOException {
-        if(State.Uninitialized != state) {
-            throw new IllegalStateException("Instance not in state "+State.Uninitialized+", but "+state+", "+this);
-        }
-        this.urlConn = urlConn;
-        if (this.urlConn != null) {
-            try {                
-                if(null != gl) {
-                    if(null!=texFrames) {
-                        // re-init ..
-                        removeAllImageTextures(gl);
-                    } else {
-                        texFrames = new TextureSequence.TextureFrame[textureCount];
-                    }
-                    final int[] tex = new int[textureCount];
-                    {
-                        gl.glGenTextures(textureCount, tex, 0);
-                        final int err = gl.glGetError();
-                        if( GL.GL_NO_ERROR != err ) {
-                            throw new RuntimeException("TextureNames creation failed (num: "+textureCount+"): err "+toHexString(err));
-                        }
+
+    @Override
+    public final float getPlaySpeed() {
+        return playSpeed;
+    }
+
+    @Override
+    public final boolean setPlaySpeed(float rate) {
+        synchronized( stateLock ) {
+            final float preSpeed = playSpeed;
+            boolean res = false;
+            if(State.Uninitialized != state ) {
+                if( rate > 0.01f ) {
+                    if( Math.abs(1.0f - rate) < 0.01f ) {
+                        rate = 1.0f;
                     }
-                    initGLStreamImpl(gl, tex);
-                    
-                    for(int i=0; i<textureCount; i++) {
-                        final TextureSequence.TextureFrame tf = createTexImage(gl, i, tex); 
-                        texFrames[i] = tf;
-                        texFrameMap.put(tex[i], tf);
+                    if( setPlaySpeedImpl(rate) ) {
+                        resetAVPTS();
+                        playSpeed = rate;
+                        res = true;
                     }
                 }
-                state = State.Stopped;
-                return state;
-            } catch (Throwable t) {
-                throw new GLException("Error initializing GL resources", t);
             }
+            if(DEBUG) { System.err.println("setPlaySpeed("+rate+"): "+state+", "+preSpeed+" -> "+playSpeed+", "+toString()); }
+            return res;
+        }
+    }
+    /**
+     * Override if not using AudioSink, or AudioSink's {@link AudioSink#setPlaySpeed(float)} is not sufficient!
+     * <p>
+     * AudioSink shall respect <code>!audioSinkPlaySpeedSet</code> to determine data_size
+     * at {@link AudioSink#enqueueData(com.jogamp.opengl.util.av.AudioSink.AudioFrame)}.
+     * </p>
+     */
+    protected boolean setPlaySpeedImpl(float rate) {
+        if( null != audioSink ) {
+            audioSinkPlaySpeedSet = audioSink.setPlaySpeed(rate);
+        }
+        // still true, even if audioSink rejects command since we deal w/ video sync
+        // and AudioSink w/ audioSinkPlaySpeedSet at enqueueData(..).
+        return true;
+    }
+
+    @Override
+    public final float getAudioVolume() {
+        getAudioVolumeImpl();
+        return audioVolume;
+    }
+    /**
+     * Override if not using AudioSink, or AudioSink's {@link AudioSink#getVolume()} is not sufficient!
+     */
+    protected void getAudioVolumeImpl() {
+        if( null != audioSink ) {
+            audioVolume = audioSink.getVolume();
+        }
+    }
+
+    @Override
+    public boolean setAudioVolume(float v) {
+        synchronized( stateLock ) {
+            final float preVolume = audioVolume;
+            boolean res = false;
+            if(State.Uninitialized != state ) {
+                if( Math.abs(v) < 0.01f ) {
+                    v = 0.0f;
+                } else if( Math.abs(1.0f - v) < 0.01f ) {
+                    v = 1.0f;
+                }
+                if( setAudioVolumeImpl(v) ) {
+                    audioVolume = v;
+                    res = true;
+                }
+            }
+            if(DEBUG) { System.err.println("setAudioVolume("+v+"): "+state+", "+preVolume+" -> "+audioVolume+", "+toString()); }
+            return res;
         }
-        return state;        
     }
-    
     /**
-     * Implementation shall set the following set of data here 
-     * @param gl TODO
-     * @param texNames TODO
+     * Override if not using AudioSink, or AudioSink's {@link AudioSink#setVolume(float)} is not sufficient!
+     */
+    protected boolean setAudioVolumeImpl(float v) {
+        if( null != audioSink ) {
+            return audioSink.setVolume(v);
+        }
+        // still true, even if audioSink rejects command ..
+        return true;
+    }
+
+    @Override
+    public final void initStream(URI streamLoc, final int vid, final int aid, int reqTextureCount) throws IllegalStateException, IllegalArgumentException {
+        synchronized( stateLock ) {
+            if(State.Uninitialized != state) {
+                throw new IllegalStateException("Instance not in state unintialized: "+this);
+            }
+            if(null == streamLoc) {
+                throw new IllegalArgumentException("streamLock is null");
+            }
+            if( STREAM_ID_NONE != vid ) {
+                textureCount = validateTextureCount(reqTextureCount);
+                if( textureCount < TEXTURE_COUNT_MIN ) {
+                    throw new InternalError("Validated texture count < "+TEXTURE_COUNT_MIN+": "+textureCount);
+                }
+            } else {
+                textureCount = 0;
+            }
+            decodedFrameCount = 0;
+            presentedFrameCount = 0;
+            displayedFrameCount = 0;
+            nullFrameCount = 0;
+            maxNullFrameCountUntilEOS = MAX_FRAMELESS_UNTIL_EOS_DEFAULT;
+            this.streamLoc = streamLoc;
+
+            // Pre-parse for camera-input scheme
+            cameraPath = null;
+            cameraProps = null;
+            final String streamLocScheme = streamLoc.getScheme();
+            if( null != streamLocScheme && streamLocScheme.equals(CameraInputScheme) ) {
+                final String rawPath = streamLoc.getRawPath();
+                if( null != rawPath && rawPath.length() > 0 ) {
+                    // cut-off root fwd-slash
+                    cameraPath = rawPath.substring(1);
+                    final URIQueryProps props = URIQueryProps.create(streamLoc, ';');
+                    cameraProps = props.getProperties();
+                } else {
+                    throw new IllegalArgumentException("Camera path is empty: "+streamLoc.toString());
+                }
+            }
+
+            this.vid = vid;
+            this.aid = aid;
+            if ( this.streamLoc != null ) {
+                new Thread() {
+                    public void run() {
+                        try {
+                            // StreamWorker may be used, see API-doc of StreamWorker
+                            initStreamImpl(vid, aid);
+                        } catch (Throwable t) {
+                            streamErr = new StreamException(t.getClass().getSimpleName()+" while initializing: "+GLMediaPlayerImpl.this.toString(), t);
+                            changeState(GLMediaEventListener.EVENT_CHANGE_ERR, GLMediaPlayer.State.Uninitialized);
+                        } // also initializes width, height, .. etc
+                    }
+                }.start();
+            }
+        }
+    }
+    /**
+     * Implementation shall set the following set of data here
+     * @see #vid
+     * @see #aid
      * @see #width
      * @see #height
      * @see #fps
      * @see #bps_stream
-     * @see #totalFrames
+     * @see #videoFrames
+     * @see #audioFrames
      * @see #acodec
      * @see #vcodec
     */
-    protected abstract void initGLStreamImpl(GL gl, int[] texNames) throws IOException;
-    
-    protected TextureSequence.TextureFrame createTexImage(GL gl, int idx, int[] tex) {
-        return new TextureSequence.TextureFrame( createTexImageImpl(gl, idx, tex, width, height, false) );
+    protected abstract void initStreamImpl(int vid, int aid) throws Exception;
+
+    @Override
+    public final StreamException getStreamException() {
+        final StreamException e;
+        synchronized( stateLock ) {
+            e = streamErr;
+            streamErr = null;
+        }
+        return e;
     }
-    
-    protected Texture createTexImageImpl(GL gl, int idx, int[] tex, int tWidth, int tHeight, boolean mustFlipVertically) {
-        if( 0 > tex[idx] ) {
-            throw new RuntimeException("TextureName "+toHexString(tex[idx])+" invalid.");
+
+    @Override
+    public final void initGL(GL gl) throws IllegalStateException, StreamException, GLException {
+        synchronized( stateLock ) {
+            if(State.Initialized != state ) {
+                throw new IllegalStateException("Stream not in state initialized: "+this);
+            }
+            if( null != streamWorker ) {
+                final StreamException streamInitErr = getStreamException();
+                if( null != streamInitErr ) {
+                    streamWorker = null; // already terminated!
+                    destroy(null);
+                    throw streamInitErr;
+                }
+            }
+            try {
+                if( STREAM_ID_NONE != vid ) {
+                    removeAllTextureFrames(gl);
+                    initGLImpl(gl);
+                    if(DEBUG) {
+                        System.err.println("initGLImpl.X "+this);
+                    }
+                    videoFramesOrig = createTexFrames(gl, textureCount);
+                    if( TEXTURE_COUNT_MIN == textureCount ) {
+                        videoFramesFree = null;
+                        videoFramesDecoded = null;
+                        lastFrame = videoFramesOrig[0];
+                    } else {
+                        videoFramesFree = new LFRingbuffer<TextureFrame>(videoFramesOrig);
+                        videoFramesDecoded = new LFRingbuffer<TextureFrame>(TextureFrame[].class, textureCount);
+                        lastFrame = videoFramesFree.getBlocking( );
+                    }
+                    if( null != streamWorker ) {
+                        streamWorker.initGL(gl);
+                    }
+                } else {
+                    removeAllTextureFrames(null);
+                    initGLImpl(null);
+                    setTextureFormat(-1, -1);
+                    setTextureType(-1);
+                    videoFramesOrig = null;
+                    videoFramesFree = null;
+                    videoFramesDecoded = null;
+                    lastFrame = null;
+                }
+                changeState(0, State.Paused);
+            } catch (Throwable t) {
+                destroyImpl(gl, GLMediaEventListener.EVENT_CHANGE_ERR); // -> GLMediaPlayer.State.Uninitialized
+                throw new GLException("Error initializing GL resources", t);
+            }
+        }
+    }
+    /**
+     * Shall initialize all GL related resources, if not audio-only.
+     * <p>
+     * Shall also take care of {@link AudioSink} initialization if appropriate.
+     * </p>
+     * @param gl null for audio-only, otherwise a valid and current GL object.
+     * @throws IOException
+     * @throws GLException
+     */
+    protected abstract void initGLImpl(GL gl) throws IOException, GLException;
+
+    /**
+     * Returns the validated number of textures to be handled.
+     * <p>
+     * Default is {@link #TEXTURE_COUNT_DEFAULT} minimum textures, if <code>desiredTextureCount</code>
+     * is < {@link #TEXTURE_COUNT_MIN}, {@link #TEXTURE_COUNT_MIN} is returned.
+     * </p>
+     * <p>
+     * Implementation must at least return a texture count of {@link #TEXTURE_COUNT_MIN}, <i>two</i>, the last texture and the decoding texture.
+     * </p>
+     */
+    protected int validateTextureCount(int desiredTextureCount) {
+        return desiredTextureCount < TEXTURE_COUNT_MIN ? TEXTURE_COUNT_MIN : desiredTextureCount;
+    }
+
+    protected TextureFrame[] createTexFrames(GL gl, final int count) {
+        final int[] texNames = new int[count];
+        gl.glGenTextures(count, texNames, 0);
+        final int err = gl.glGetError();
+        if( GL.GL_NO_ERROR != err ) {
+            throw new RuntimeException("TextureNames creation failed (num: "+count+"): err "+toHexString(err));
+        }
+        final TextureFrame[] texFrames = new TextureFrame[count];
+        for(int i=0; i<count; i++) {
+            texFrames[i] = createTexImage(gl, texNames[i]);
+        }
+        return texFrames;
+    }
+    protected abstract TextureFrame createTexImage(GL gl, int texName);
+
+    protected final Texture createTexImageImpl(GL gl, int texName, int tWidth, int tHeight) {
+        if( 0 > texName ) {
+            throw new RuntimeException("TextureName "+toHexString(texName)+" invalid.");
         }
         gl.glActiveTexture(GL.GL_TEXTURE0+getTextureUnit());
-        gl.glBindTexture(textureTarget, tex[idx]);
+        gl.glBindTexture(textureTarget, texName);
         {
             final int err = gl.glGetError();
             if( GL.GL_NO_ERROR != err ) {
-                throw new RuntimeException("Couldn't bind textureName "+toHexString(tex[idx])+" to 2D target, err "+toHexString(err));
+                throw new RuntimeException("Couldn't bind textureName "+toHexString(texName)+" to 2D target, err "+toHexString(err));
             }
         }
 
@@ -361,9 +700,9 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
             gl.glTexImage2D(
                     textureTarget,    // target
                     0,                // level
-                    GL.GL_RGBA,       // internal format
-                    tWidth,            // width
-                    tHeight,           // height
+                    textureInternalFormat, // internal format
+                    tWidth,           // width
+                    tHeight,          // height
                     0,                // border
                     textureFormat,
                     textureType,
@@ -371,55 +710,691 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
             {
                 final int err = gl.glGetError();
                 if( GL.GL_NO_ERROR != err ) {
-                    throw new RuntimeException("Couldn't create TexImage2D RGBA "+tWidth+"x"+tHeight+", err "+toHexString(err));
+                    throw new RuntimeException("Couldn't create TexImage2D RGBA "+tWidth+"x"+tHeight+", target "+toHexString(textureTarget)+
+                                   ", ifmt "+toHexString(textureInternalFormat)+", fmt "+toHexString(textureFormat)+", type "+toHexString(textureType)+
+                                   ", err "+toHexString(err));
                 }
             }
             if(DEBUG) {
                 System.err.println("Created TexImage2D RGBA "+tWidth+"x"+tHeight+", target "+toHexString(textureTarget)+
-                                   ", ifmt "+toHexString(GL.GL_RGBA)+", fmt "+toHexString(textureFormat)+", type "+toHexString(textureType));
+                                   ", ifmt "+toHexString(textureInternalFormat)+", fmt "+toHexString(textureFormat)+", type "+toHexString(textureType));
             }
         }
         gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MIN_FILTER, texMinMagFilter[0]);
-        gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MAG_FILTER, texMinMagFilter[1]);        
+        gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MAG_FILTER, texMinMagFilter[1]);
         gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_S, texWrapST[0]);
         gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_T, texWrapST[1]);
-        
-        return com.jogamp.opengl.util.texture.TextureIO.newTexture(tex[idx],
-                     textureTarget,
+
+        return com.jogamp.opengl.util.texture.TextureIO.newTexture(
+                     texName, textureTarget,
                      tWidth, tHeight,
                      width,  height,
-                     mustFlipVertically);        
-    }
-    
-    protected void destroyTexImage(GL gl, TextureSequence.TextureFrame imgTex) {
-        imgTex.getTexture().destroy(gl);        
-    }
-    
-    protected void removeAllImageTextures(GL gl) {
-        if(null != texFrames) {
-            for(int i=0; i<textureCount; i++) {
-                final TextureSequence.TextureFrame imgTex = texFrames[i];
-                if(null != imgTex) {
-                    destroyTexImage(gl, imgTex);
+                     !isInGLOrientation);
+    }
+
+    protected void destroyTexFrame(GL gl, TextureFrame frame) {
+        frame.getTexture().destroy(gl);
+    }
+
+    @Override
+    public final TextureFrame getLastTexture() throws IllegalStateException {
+        if( State.Paused != state && State.Playing != state ) {
+            throw new IllegalStateException("Instance not paused or playing: "+this);
+        }
+        return lastFrame;
+    }
+
+    private final void removeAllTextureFrames(GL gl) {
+        final TextureFrame[] texFrames = videoFramesOrig;
+        videoFramesOrig = null;
+        videoFramesFree = null;
+        videoFramesDecoded = null;
+        lastFrame = null;
+        if( null != texFrames ) {
+            for(int i=0; i<texFrames.length; i++) {
+                final TextureFrame frame = texFrames[i];
+                if(null != frame) {
+                    if( null != gl ) {
+                        destroyTexFrame(gl, frame);
+                    }
                     texFrames[i] = null;
                 }
+                if( DEBUG ) {
+                    System.err.println(Thread.currentThread().getName()+"> Clear TexFrame["+i+"]: "+frame+" -> null");
+                }
+            }
+        }
+    }
+
+    protected TextureFrame cachedFrame = null;
+    protected long lastTimeMillis = 0;
+
+    private final boolean[] stGotVFrame = { false };
+
+    @Override
+    public final TextureFrame getNextTexture(GL gl) throws IllegalStateException {
+        synchronized( stateLock ) {
+            if( State.Paused != state && State.Playing != state ) {
+                throw new IllegalStateException("Instance not paused or playing: "+this);
+            }
+            if(State.Playing == state) {
+                boolean dropFrame = false;
+                try {
+                    do {
+                        final boolean droppedFrame;
+                        if( dropFrame ) {
+                            presentedFrameCount--;
+                            dropFrame = false;
+                            droppedFrame = true;
+                        } else {
+                            droppedFrame = false;
+                        }
+                        final boolean playCached = null != cachedFrame;
+                        final int video_pts;
+                        final boolean hasVideoFrame;
+                        TextureFrame nextFrame;
+                        if( playCached ) {
+                            nextFrame = cachedFrame;
+                            cachedFrame = null;
+                            presentedFrameCount--;
+                            video_pts = nextFrame.getPTS();
+                            hasVideoFrame = true;
+                        } else {
+                            if( null != videoFramesDecoded ) {
+                                // multi-threaded and video available
+                                nextFrame = videoFramesDecoded.get();
+                                if( null != nextFrame ) {
+                                    video_pts = nextFrame.getPTS();
+                                    hasVideoFrame = true;
+                                } else {
+                                    video_pts = TimeFrameI.INVALID_PTS;
+                                    hasVideoFrame = false;
+                                }
+                            } else {
+                                // single-threaded or audio-only
+                                video_pts = getNextSingleThreaded(gl, lastFrame, stGotVFrame);
+                                nextFrame = lastFrame;
+                                hasVideoFrame = stGotVFrame[0];
+                            }
+                        }
+                        final long currentTimeMillis = Platform.currentTimeMillis();
+
+                        if( TimeFrameI.END_OF_STREAM_PTS == video_pts ||
+                            ( duration > 0 && duration <= video_pts ) || maxNullFrameCountUntilEOS <= nullFrameCount )
+                        {
+                            // EOS
+                            if( DEBUG ) {
+                                System.err.println( "AV-EOS (getNextTexture): EOS_PTS "+(TimeFrameI.END_OF_STREAM_PTS == video_pts)+", "+this);
+                            }
+                            pauseImpl(true, GLMediaEventListener.EVENT_CHANGE_EOS);
+
+                        } else if( TimeFrameI.INVALID_PTS == video_pts ) { // no audio or video frame
+                            if( null == videoFramesDecoded || !videoFramesDecoded.isEmpty() ) {
+                                nullFrameCount++;
+                            }
+                            if( DEBUG ) {
+                                final int audio_pts = getAudioPTSImpl();
+                                final int audio_scr = (int) ( ( currentTimeMillis - audio_scr_t0 ) * playSpeed );
+                                final int d_apts;
+                                if( audio_pts != TimeFrameI.INVALID_PTS ) {
+                                    d_apts = audio_pts - audio_scr;
+                                } else {
+                                    d_apts = 0;
+                                }
+                                final int video_scr = video_scr_pts + (int) ( ( currentTimeMillis - video_scr_t0 ) * playSpeed );
+                                final int d_vpts = video_pts - video_scr;
+                                System.err.println( "AV~: dT "+(currentTimeMillis-lastTimeMillis)+", nullFrames "+nullFrameCount+
+                                        getPerfStringImpl( video_scr, video_pts, d_vpts, audio_scr, audio_pts, d_apts, 0 ) + ", droppedFrame "+droppedFrame);
+                            }
+                        } else { // valid pts: has audio or video frame
+                            nullFrameCount=0;
+
+                            if( hasVideoFrame ) { // has video frame
+                                presentedFrameCount++;
+
+                                final int audio_pts = getAudioPTSImpl();
+                                final int audio_scr = (int) ( ( currentTimeMillis - audio_scr_t0 ) * playSpeed );
+                                final int d_apts;
+                                if( audio_pts != TimeFrameI.INVALID_PTS ) {
+                                    d_apts = audio_pts - audio_scr;
+                                } else {
+                                    d_apts = 0;
+                                }
+
+                                final int frame_period_last = video_pts - video_pts_last; // rendering loop interrupted ?
+                                if( videoSCR_reset || frame_period_last > frame_duration*10 ) {
+                                    videoSCR_reset = false;
+                                    video_scr_t0 = currentTimeMillis;
+                                    video_scr_pts = video_pts;
+                                }
+                                final int video_scr = video_scr_pts + (int) ( ( currentTimeMillis - video_scr_t0 ) * playSpeed );
+                                final int d_vpts = video_pts - video_scr;
+                                // final int d_avpts = d_vpts - d_apts;
+                                if( -VIDEO_DPTS_MAX > d_vpts || d_vpts > VIDEO_DPTS_MAX ) {
+                                // if( -VIDEO_DPTS_MAX > d_avpts || d_avpts > VIDEO_DPTS_MAX ) {
+                                    if( DEBUG ) {
+                                        System.err.println( "AV*: dT "+(currentTimeMillis-lastTimeMillis)+", "+
+                                                getPerfStringImpl( video_scr, video_pts, d_vpts, audio_scr, audio_pts, d_apts, 0 ) + ", "+nextFrame+", playCached " + playCached+ ", dropFrame "+dropFrame);
+                                    }
+                                } else {
+                                    final int dpy_den = displayedFrameCount > 0 ? displayedFrameCount : 1;
+                                    final int avg_dpy_duration = ( (int) ( currentTimeMillis - video_scr_t0 ) ) / dpy_den ; // ms/f
+                                    final int maxVideoDelay = Math.min(avg_dpy_duration, MAXIMUM_VIDEO_ASYNC);
+                                    video_dpts_count++;
+                                    // video_dpts_cum = d_avpts + VIDEO_DPTS_COEFF * video_dpts_cum;
+                                    video_dpts_cum = d_vpts + VIDEO_DPTS_COEFF * video_dpts_cum;
+                                    final int video_dpts_avg_diff = video_dpts_count >= VIDEO_DPTS_NUM ? getVideoDPTSAvg() : 0;
+                                    final int dt = (int) ( video_dpts_avg_diff / playSpeed + 0.5f );
+                                    // final int dt = (int) ( d_vpts  / playSpeed + 0.5f );
+                                    // final int dt = (int) ( d_avpts / playSpeed + 0.5f );
+                                    final TextureFrame _nextFrame = nextFrame;
+                                    if( dt > maxVideoDelay ) {
+                                        cachedFrame = nextFrame;
+                                        nextFrame = null;
+                                    } else if ( !droppedFrame && dt < -maxVideoDelay && null != videoFramesDecoded && videoFramesDecoded.size() > 0 ) {
+                                        // only drop if prev. frame has not been dropped and
+                                        // frame is too late and one decoded frame is already available.
+                                        dropFrame = true;
+                                    }
+                                    video_pts_last = video_pts;
+                                    if( DEBUG ) {
+                                        System.err.println( "AV_: dT "+(currentTimeMillis-lastTimeMillis)+", "+
+                                                getPerfStringImpl( video_scr, video_pts, d_vpts,
+                                                                   audio_scr, audio_pts, d_apts,
+                                                                   video_dpts_avg_diff ) +
+                                                                   ", avg dpy-fps "+avg_dpy_duration+" ms/f, maxD "+maxVideoDelay+" ms, "+_nextFrame+", playCached " + playCached + ", dropFrame "+dropFrame);
+                                    }
+                                }
+                            } // has video frame
+                        } // has audio or video frame
+
+                        if( null != videoFramesFree && null != nextFrame ) {
+                            // Had frame and not single threaded ? (TEXTURE_COUNT_MIN < textureCount)
+                            final TextureFrame _lastFrame = lastFrame;
+                            lastFrame = nextFrame;
+                            if( null != _lastFrame ) {
+                                videoFramesFree.putBlocking(_lastFrame);
+                            }
+                        }
+                        lastTimeMillis = currentTimeMillis;
+                    } while( dropFrame );
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+            }
+            displayedFrameCount++;
+            return lastFrame;
+        }
+    }
+    protected void preNextTextureImpl(GL gl) {}
+    protected void postNextTextureImpl(GL gl) {}
+    /**
+     * Process stream until the next video frame, i.e. {@link TextureFrame}, has been reached.
+     * Audio frames, i.e. {@link AudioSink.AudioFrame}, shall be handled in the process.
+     * <p>
+     * Video frames shall be ignored, if {@link #getVID()} is {@link #STREAM_ID_NONE}.
+     * </p>
+     * <p>
+     * Audio frames shall be ignored, if {@link #getAID()} is {@link #STREAM_ID_NONE}.
+     * </p>
+     * <p>
+     * Method may be invoked on the <a href="#streamworker"><i>StreamWorker</i> decoding thread</a>.
+     * </p>
+     * <p>
+     * Implementation shall care of OpenGL synchronization as required, e.g. glFinish()/glFlush()!
+     * </p>
+     * @param gl valid and current GL instance, shall be <code>null</code> for audio only.
+     * @param nextFrame the {@link TextureFrame} to store the video PTS and texture data,
+     *                  shall be <code>null</code> for audio only.
+     * @return the last processed video PTS value, maybe {@link TimeFrameI#INVALID_PTS} if video frame is invalid or n/a.
+     *         Will be {@link TimeFrameI#END_OF_STREAM_PTS} if end of stream reached.
+     */
+    protected abstract int getNextTextureImpl(GL gl, TextureFrame nextFrame);
+
+    protected final int getNextSingleThreaded(final GL gl, final TextureFrame nextFrame, boolean[] gotVFrame) throws InterruptedException {
+        final int pts;
+        if( STREAM_ID_NONE != vid ) {
+            preNextTextureImpl(gl);
+            pts = getNextTextureImpl(gl, nextFrame);
+            postNextTextureImpl(gl);
+            if( TimeFrameI.INVALID_PTS != pts ) {
+                newFrameAvailable(nextFrame, Platform.currentTimeMillis());
+                gotVFrame[0] = true;
+            } else {
+                gotVFrame[0] = false;
+            }
+        } else {
+            // audio only
+            pts = getNextTextureImpl(null, null);
+            gotVFrame[0] = false;
+        }
+        return pts;
+    }
+
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Note: All {@link AudioSink} operations are performed from {@link GLMediaPlayerImpl},
+     * i.e. {@link #play()}, {@link #pause(boolean)}, {@link #seek(int)}, {@link #setPlaySpeed(float)}, {@link #getAudioPTS()}.
+     * </p>
+     * <p>
+     * Implementations using an {@link AudioSink} shall write it's instance to {@link #audioSink}
+     * from within their {@link #initStreamImpl(int, int)} implementation.
+     * </p>
+     */
+    @Override
+    public final AudioSink getAudioSink() { return audioSink; }
+
+    /**
+     * To be called from implementation at 1st PTS after start
+     * w/ current pts value in milliseconds.
+     * @param audio_scr_t0
+     */
+    protected void setFirstAudioPTS2SCR(int pts) {
+        if( audioSCR_reset ) {
+            audio_scr_t0 = Platform.currentTimeMillis() - pts;
+            audioSCR_reset = false;
+        }
+    }
+    private void flushAllVideoFrames() {
+        if( null != videoFramesFree ) {
+            videoFramesFree.resetFull(videoFramesOrig);
+            lastFrame = videoFramesFree.get();
+            if( null == lastFrame ) { throw new InternalError("XXX"); }
+            videoFramesDecoded.clear();
+        }
+        cachedFrame = null;
+    }
+    private void resetAVPTSAndFlush() {
+        video_dpts_cum = 0;
+        video_dpts_count = 0;
+        resetAVPTS();
+        flushAllVideoFrames();
+        if( null != audioSink ) {
+            audioSink.flush();
+        }
+    }
+    private void resetAVPTS() {
+        nullFrameCount = 0;
+        presentedFrameCount = 0;
+        displayedFrameCount = 0;
+        decodedFrameCount = 0;
+        audioSCR_reset = true;
+        videoSCR_reset = true;
+    }
+    private final int getVideoDPTSAvg() {
+        return (int) ( video_dpts_cum * (1.0f - VIDEO_DPTS_COEFF) + 0.5f );
+    }
+
+    private final void newFrameAvailable(TextureFrame frame, long currentTimeMillis) {
+        decodedFrameCount++;
+        if( 0 == frame.getDuration() ) { // patch frame duration if not set already
+            frame.setDuration( (int) frame_duration );
+        }
+        synchronized(eventListenersLock) {
+            for(Iterator<GLMediaEventListener> i = eventListeners.iterator(); i.hasNext(); ) {
+                i.next().newFrameAvailable(this, frame, currentTimeMillis);
+            }
+        }
+    }
+
+    /**
+     * After {@link GLMediaPlayerImpl#initStreamImpl(int, int) initStreamImpl(..)} is completed via
+     * {@link GLMediaPlayerImpl#updateAttributes(int, int, int, int, int, int, int, float, int, int, int, String, String) updateAttributes(..)},
+     * the latter decides whether StreamWorker is being used.
+     */
+    class StreamWorker extends Thread {
+        private volatile boolean isRunning = false;
+        private volatile boolean isActive = false;
+        private volatile boolean isBlocked = false;
+
+        private volatile boolean shallPause = true;
+        private volatile boolean shallStop = false;
+
+        private volatile GLContext sharedGLCtx = null;
+        private boolean sharedGLCtxCurrent = false;
+        private GLDrawable dummyDrawable = null;
+
+        /**
+         * Starts this daemon thread,
+         * <p>
+         * This thread pauses after it's started!
+         * </p>
+         **/
+        StreamWorker() {
+            setDaemon(true);
+            synchronized(this) {
+                start();
+                while( !isRunning ) {
+                    this.notifyAll();  // wake-up startup-block
+                    try {
+                        this.wait();  // wait until started
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+        }
+
+        private void makeCurrent(GLContext ctx) {
+            if( GLContext.CONTEXT_NOT_CURRENT >= ctx.makeCurrent() ) {
+                throw new GLException("Couldn't make ctx current: "+ctx);
+            }
+        }
+
+        private void destroySharedGL() {
+            if( null != sharedGLCtx ) {
+                if( sharedGLCtx.isCreated() ) {
+                    // Catch dispose GLExceptions by GLEventListener, just 'print' them
+                    // so we can continue with the destruction.
+                    try {
+                        sharedGLCtx.destroy();
+                    } catch (GLException gle) {
+                        gle.printStackTrace();
+                    }
+                }
+                sharedGLCtx = null;
+            }
+            if( null != dummyDrawable ) {
+                final AbstractGraphicsDevice device = dummyDrawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice();
+                dummyDrawable.setRealized(false);
+                dummyDrawable = null;
+                device.close();
+            }
+        }
+
+        public final synchronized void initGL(GL gl) {
+            final GLContext glCtx = gl.getContext();
+            final boolean glCtxCurrent = glCtx.isCurrent();
+            final GLProfile glp = gl.getGLProfile();
+            final GLDrawableFactory factory = GLDrawableFactory.getFactory(glp);
+            final AbstractGraphicsDevice device = glCtx.getGLDrawable().getNativeSurface().getGraphicsConfiguration().getScreen().getDevice();
+            dummyDrawable = factory.createDummyDrawable(device, true, glCtx.getGLDrawable().getChosenGLCapabilities(), null); // own device!
+            dummyDrawable.setRealized(true);
+            sharedGLCtx = dummyDrawable.createContext(glCtx);
+            makeCurrent(sharedGLCtx);
+            if( glCtxCurrent ) {
+                makeCurrent(glCtx);
+            } else {
+                sharedGLCtx.release();
+            }
+        }
+        public final synchronized void doPause() {
+            if( isActive ) {
+                shallPause = true;
+                if( Thread.currentThread() != this ) {
+                    if( isBlocked && isActive ) {
+                        this.interrupt();
+                    }
+                    while( isActive ) {
+                        try {
+                            this.wait(); // wait until paused
+                        } catch (InterruptedException e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+            }
+        }
+        public final synchronized void doResume() {
+            if( isRunning && !isActive ) {
+                shallPause = false;
+                if( Thread.currentThread() != this ) {
+                    while( !isActive ) {
+                        this.notifyAll();  // wake-up pause-block
+                        try {
+                            this.wait(); // wait until resumed
+                        } catch (InterruptedException e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+            }
+        }
+        public final synchronized void doStop() {
+            if( isRunning ) {
+                shallStop = true;
+                if( Thread.currentThread() != this ) {
+                    if( isBlocked && isRunning ) {
+                        this.interrupt();
+                    }
+                    while( isRunning ) {
+                        this.notifyAll();  // wake-up pause-block (opt)
+                        try {
+                            this.wait();  // wait until stopped
+                        } catch (InterruptedException e) {
+                            e.printStackTrace();
+                        }
+                    }
+                }
+            }
+        }
+        public final boolean isRunning() { return isRunning; }
+        public final boolean isActive() { return isActive; }
+
+        @Override
+        public final void run() {
+            setName(getName()+"-StreamWorker_"+StreamWorkerInstanceId);
+            StreamWorkerInstanceId++;
+
+            synchronized ( this ) {
+                isRunning = true;
+                this.notifyAll(); // wake-up ctor()
+            }
+
+            while( !shallStop ){
+                if( shallPause ) {
+                    synchronized ( this ) {
+                        if( sharedGLCtxCurrent ) {
+                            postNextTextureImpl(sharedGLCtx.getGL());
+                            sharedGLCtx.release();
+                        }
+                        while( shallPause && !shallStop ) {
+                            isActive = false;
+                            this.notifyAll();   // wake-up doPause()
+                            try {
+                                this.wait(); // wait until resumed
+                            } catch (InterruptedException e) {
+                                if( !shallPause ) {
+                                    e.printStackTrace();
+                                }
+                            }
+                        }
+                        if( sharedGLCtxCurrent ) {
+                            makeCurrent(sharedGLCtx);
+                            preNextTextureImpl(sharedGLCtx.getGL());
+                        }
+                        isActive = true;
+                        this.notifyAll(); // wake-up doResume()
+                    }
+                }
+                if( !sharedGLCtxCurrent && null != sharedGLCtx ) {
+                    synchronized ( this ) {
+                        if( null != sharedGLCtx ) {
+                            makeCurrent( sharedGLCtx );
+                            preNextTextureImpl(sharedGLCtx.getGL());
+                            sharedGLCtxCurrent = true;
+                        }
+                        if( null == videoFramesFree ) {
+                            throw new InternalError("XXX videoFramesFree is null");
+                        }
+                    }
+                }
+
+                if( !shallStop ) {
+                    TextureFrame nextFrame = null;
+                    try {
+                        isBlocked = true;
+                        final GL gl;
+                        if( STREAM_ID_NONE != vid ) {
+                            nextFrame = videoFramesFree.getBlocking();
+                            nextFrame.setPTS( TimeFrameI.INVALID_PTS ); // mark invalid until processed!
+                            gl = sharedGLCtx.getGL();
+                        } else {
+                            gl = null;
+                        }
+                        isBlocked = false;
+                        final int vPTS = getNextTextureImpl(gl, nextFrame);
+                        boolean audioEOS = false;
+                        if( TimeFrameI.INVALID_PTS != vPTS ) {
+                            if( null != nextFrame ) {
+                                if( STREAM_WORKER_DELAY > 0 ) {
+                                    Thread.sleep(STREAM_WORKER_DELAY);
+                                }
+                                if( !videoFramesDecoded.put(nextFrame) ) {
+                                    throw new InternalError("XXX: free "+videoFramesFree+", decoded "+videoFramesDecoded+", "+GLMediaPlayerImpl.this);
+                                }
+                                newFrameAvailable(nextFrame, Platform.currentTimeMillis());
+                                nextFrame = null;
+                            } else {
+                                // audio only
+                                if( TimeFrameI.END_OF_STREAM_PTS == vPTS || ( duration > 0 && duration < vPTS ) ) {
+                                    audioEOS = true;
+                                } else {
+                                    nullFrameCount = 0;
+                                }
+                            }
+                        } else if( null == nextFrame ) {
+                            // audio only
+                            audioEOS = maxNullFrameCountUntilEOS <= nullFrameCount;
+                            if( null == audioSink || 0 == audioSink.getEnqueuedFrameCount() ) {
+                                nullFrameCount++;
+                            }
+                        }
+                        if( audioEOS ) {
+                            // state transition incl. notification
+                            synchronized ( this ) {
+                                shallPause = true;
+                                isActive = false;
+                                this.notifyAll(); // wake-up potential do*()
+                            }
+                            if( DEBUG ) {
+                                System.err.println( "AV-EOS (StreamWorker): EOS_PTS "+(TimeFrameI.END_OF_STREAM_PTS == vPTS)+", "+GLMediaPlayerImpl.this);
+                            }
+                            pauseImpl(true, GLMediaEventListener.EVENT_CHANGE_EOS);
+                        }
+                    } catch (InterruptedException e) {
+                        isBlocked = false;
+                        if( !shallStop && !shallPause ) {
+                            streamErr = new StreamException("InterruptedException while decoding: "+GLMediaPlayerImpl.this.toString(), e);
+                        }
+                    } catch (Throwable t) {
+                        streamErr = new StreamException(t.getClass().getSimpleName()+" while decoding: "+GLMediaPlayerImpl.this.toString(), t);
+                    } finally {
+                        if( null != nextFrame ) { // put back
+                            videoFramesFree.put(nextFrame);
+                        }
+                        if( null != streamErr ) {
+                            if( DEBUG ) {
+                                final Throwable t = null != streamErr.getCause() ? streamErr.getCause() : streamErr;
+                                System.err.println("Caught StreamException: "+t.getMessage());
+                                t.printStackTrace();
+                            }
+                            // state transition incl. notification
+                            synchronized ( this ) {
+                                shallPause = true;
+                                isActive = false;
+                                this.notifyAll(); // wake-up potential do*()
+                            }
+                            pauseImpl(true, GLMediaEventListener.EVENT_CHANGE_ERR);
+                        }
+                    }
+                }
+            }
+            synchronized ( this ) {
+                if( sharedGLCtxCurrent ) {
+                    postNextTextureImpl(sharedGLCtx.getGL());
+                }
+                destroySharedGL();
+                isRunning = false;
+                isActive = false;
+                this.notifyAll(); // wake-up doStop()
+            }
+        }
+    }
+    static int StreamWorkerInstanceId = 0;
+    private volatile StreamWorker streamWorker = null;
+    private volatile StreamException streamErr = null;
+
+    protected final int addStateEventMask(int event_mask, State newState) {
+        if( state != newState ) {
+            switch( newState ) {
+                case Uninitialized:
+                    event_mask |= GLMediaEventListener.EVENT_CHANGE_UNINIT;
+                    break;
+                case Initialized:
+                    event_mask |= GLMediaEventListener.EVENT_CHANGE_INIT;
+                    break;
+                case Playing:
+                    event_mask |= GLMediaEventListener.EVENT_CHANGE_PLAY;
+                    break;
+                case Paused:
+                    event_mask |= GLMediaEventListener.EVENT_CHANGE_PAUSE;
+                    break;
+            }
+        }
+        return event_mask;
+    }
+
+    protected final void attributesUpdated(int event_mask) {
+        if( 0 != event_mask ) {
+            final long now = Platform.currentTimeMillis();
+            synchronized(eventListenersLock) {
+                for(Iterator<GLMediaEventListener> i = eventListeners.iterator(); i.hasNext(); ) {
+                    i.next().attributesChanged(this, event_mask, now);
+                }
             }
         }
-        texFrameMap.clear();
     }
 
-    protected final void updateAttributes(int width, int height, int bps_stream, int bps_video, int bps_audio, 
-                                          float fps, int totalFrames, int duration, 
-                                          String vcodec, String acodec) {
+    protected final void changeState(int event_mask, State newState) {
+        event_mask = addStateEventMask(event_mask, newState);
+        if( 0 != event_mask ) {
+            state = newState;
+            attributesUpdated( event_mask );
+        }
+    }
+
+    protected final void updateAttributes(int vid, int aid, int width, int height, int bps_stream,
+                                          int bps_video, int bps_audio, float fps,
+                                          int videoFrames, int audioFrames, int duration, String vcodec, String acodec) {
         int event_mask = 0;
+        final boolean wasUninitialized = state == State.Uninitialized;
+
+        if( wasUninitialized ) {
+            event_mask |= GLMediaEventListener.EVENT_CHANGE_INIT;
+            state = State.Initialized;
+        }
+        if( STREAM_ID_AUTO == vid ) {
+            vid = STREAM_ID_NONE;
+        }
+        if( this.vid != vid ) {
+            event_mask |= GLMediaEventListener.EVENT_CHANGE_VID;
+            this.vid = vid;
+        }
+        if( STREAM_ID_AUTO == vid ) {
+            vid = STREAM_ID_NONE;
+        }
+        if( this.aid != aid ) {
+            event_mask |= GLMediaEventListener.EVENT_CHANGE_AID;
+            this.aid = aid;
+        }
         if( this.width != width || this.height != height ) {
             event_mask |= GLMediaEventListener.EVENT_CHANGE_SIZE;
             this.width = width;
             this.height = height;
-        }   
+        }
         if( this.fps != fps ) {
             event_mask |= GLMediaEventListener.EVENT_CHANGE_FPS;
             this.fps = fps;
+            if( 0 != fps ) {
+                this.frame_duration = 1000f / fps;
+                this.maxNullFrameCountUntilEOS = MAX_FRAMELESS_MS_UNTIL_EOS / (int)this.frame_duration;
+            } else {
+                this.frame_duration = 0;
+                this.maxNullFrameCountUntilEOS = MAX_FRAMELESS_UNTIL_EOS_DEFAULT;
+            }
         }
         if( this.bps_stream != bps_stream || this.bps_video != bps_video || this.bps_audio != bps_audio ) {
             event_mask |= GLMediaEventListener.EVENT_CHANGE_BPS;
@@ -427,12 +1402,13 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
             this.bps_video = bps_video;
             this.bps_audio = bps_audio;
         }
-        if( this.totalFrames != totalFrames || this.duration != duration ) {
+        if( this.videoFrames != videoFrames || this.audioFrames != audioFrames || this.duration != duration ) {
             event_mask |= GLMediaEventListener.EVENT_CHANGE_LENGTH;
-            this.totalFrames = totalFrames;
+            this.videoFrames = videoFrames;
+            this.audioFrames = audioFrames;
             this.duration = duration;
         }
-        if( (null!=acodec && acodec.length()>0 && !this.acodec.equals(acodec)) ) { 
+        if( (null!=acodec && acodec.length()>0 && !this.acodec.equals(acodec)) ) {
             event_mask |= GLMediaEventListener.EVENT_CHANGE_CODEC;
             this.acodec = acodec;
         }
@@ -443,97 +1419,152 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
         if(0==event_mask) {
             return;
         }
-        attributesUpdated(event_mask);    
-    }
-
-    protected final void attributesUpdated(int event_mask) {
-        synchronized(eventListenersLock) {
-            for(Iterator<GLMediaEventListener> i = eventListeners.iterator(); i.hasNext(); ) {
-                i.next().attributesChanges(this, event_mask, System.currentTimeMillis());
+        if( wasUninitialized ) {
+            if( null != streamWorker ) {
+                throw new InternalError("XXX: StreamWorker not null - "+this);
+            }
+            if( TEXTURE_COUNT_MIN < textureCount || STREAM_ID_NONE == vid ) { // Enable StreamWorker for 'audio only' as well (Bug 918).
+                streamWorker = new StreamWorker();
+            }
+            if( DEBUG ) {
+                System.err.println("XXX Initialize @ updateAttributes: "+this);
             }
         }
+        attributesUpdated(event_mask);
     }
-    protected final void newFrameAvailable() {
-        frameNumber++;        
-        synchronized(eventListenersLock) {
-            for(Iterator<GLMediaEventListener> i = eventListeners.iterator(); i.hasNext(); ) {
-                i.next().newFrameAvailable(this, System.currentTimeMillis());
+
+    protected void setIsGLOriented(boolean isGLOriented) {
+        if( isInGLOrientation != isGLOriented ) {
+            if( DEBUG ) {
+                System.err.println("XXX gl-orient "+isInGLOrientation+" -> "+isGLOriented);
             }
+            isInGLOrientation = isGLOriented;
+            for(int i=0; i<videoFramesOrig.length; i++) {
+                videoFramesOrig[i].getTexture().setMustFlipVertically(!isGLOriented);
+            }
+            attributesUpdated(GLMediaEventListener.EVENT_CHANGE_SIZE);
         }
     }
-    
+
     @Override
-    public final synchronized State destroy(GL gl) {
-        destroyImpl(gl);
-        removeAllImageTextures(gl);
-        state = State.Uninitialized;
-        return state;
+    public final URI getURI() {
+        return streamLoc;
     }
-    protected abstract void destroyImpl(GL gl);
 
     @Override
-    public final synchronized URLConnection getURLConnection() {
-        return urlConn;
-    }
+    public final int getVID() { return vid; }
+
+    @Override
+    public final int getAID() { return aid; }
 
     @Override
-    public final synchronized String getVideoCodec() {
+    public final String getVideoCodec() {
         return vcodec;
     }
 
     @Override
-    public final synchronized String getAudioCodec() {
+    public final String getAudioCodec() {
         return acodec;
     }
 
     @Override
-    public final synchronized long getTotalFrames() {
-        return totalFrames;
+    public final int getVideoFrames() {
+        return videoFrames;
+    }
+
+    @Override
+    public final int getAudioFrames() {
+        return audioFrames;
     }
 
     @Override
-    public final synchronized int getDuration() {
+    public final int getDuration() {
         return duration;
     }
-    
+
     @Override
-    public final synchronized long getStreamBitrate() {
+    public final long getStreamBitrate() {
         return bps_stream;
     }
 
     @Override
-    public final synchronized int getVideoBitrate() {
+    public final int getVideoBitrate() {
         return bps_video;
     }
-    
+
     @Override
-    public final synchronized int getAudioBitrate() {
+    public final int getAudioBitrate() {
         return bps_audio;
     }
-    
+
     @Override
-    public final synchronized float getFramerate() {
+    public final float getFramerate() {
         return fps;
     }
 
     @Override
-    public final synchronized int getWidth() {
+    public final boolean isGLOriented() {
+        return isInGLOrientation;
+    }
+
+    @Override
+    public final int getWidth() {
         return width;
     }
 
     @Override
-    public final synchronized int getHeight() {
+    public final int getHeight() {
         return height;
     }
 
     @Override
-    public final synchronized String toString() {
-        final float ct = getCurrentPosition() / 1000.0f, tt = getDuration() / 1000.0f;
-        final String loc = ( null != urlConn ) ? urlConn.getURL().toExternalForm() : "<undefined stream>" ;
-        return "GLMediaPlayer["+state+", "+frameNumber+"/"+totalFrames+" frames, "+ct+"/"+tt+"s, speed "+playSpeed+", "+bps_stream+" bps, "+
-                "Texture[count "+textureCount+", target "+toHexString(textureTarget)+", format "+toHexString(textureFormat)+", type "+toHexString(textureType)+"], "+               
-               "Stream[Video[<"+vcodec+">, "+width+"x"+height+", "+fps+" fps, "+bps_video+" bsp], "+
-               "Audio[<"+acodec+">, "+bps_audio+" bsp]], "+loc+"]";
+    public final String toString() {
+        final float tt = getDuration() / 1000.0f;
+        final String loc = ( null != streamLoc ) ? streamLoc.toString() : "<undefined stream>" ;
+        final int freeVideoFrames = null != videoFramesFree ? videoFramesFree.size() : 0;
+        final int decVideoFrames = null != videoFramesDecoded ? videoFramesDecoded.size() : 0;
+        final int video_scr = video_scr_pts + (int) ( ( Platform.currentTimeMillis() - video_scr_t0 ) * playSpeed );
+        final String camPath = null != cameraPath ? ", camera: "+cameraPath : "";
+        return "GLMediaPlayer["+state+", vSCR "+video_scr+", frames[p "+presentedFrameCount+", d "+decodedFrameCount+", t "+videoFrames+" ("+tt+" s), z "+nullFrameCount+" / "+maxNullFrameCountUntilEOS+"], "+
+               "speed "+playSpeed+", "+bps_stream+" bps, hasSW "+(null!=streamWorker)+
+               ", Texture[count "+textureCount+", free "+freeVideoFrames+", dec "+decVideoFrames+", tagt "+toHexString(textureTarget)+", ifmt "+toHexString(textureInternalFormat)+", fmt "+toHexString(textureFormat)+", type "+toHexString(textureType)+"], "+
+               "Video[id "+vid+", <"+vcodec+">, "+width+"x"+height+", glOrient "+isInGLOrientation+", "+fps+" fps, "+frame_duration+" fdur, "+bps_video+" bps], "+
+               "Audio[id "+aid+", <"+acodec+">, "+bps_audio+" bps, "+audioFrames+" frames], uri "+loc+camPath+"]";
+    }
+
+    @Override
+    public final String getPerfString() {
+        final long currentTimeMillis = Platform.currentTimeMillis();
+        final int video_scr = video_scr_pts + (int) ( ( currentTimeMillis - video_scr_t0 ) * playSpeed );
+        final int d_vpts = video_pts_last - video_scr;
+        final int audio_scr = (int) ( ( currentTimeMillis - audio_scr_t0 ) * playSpeed );
+        final int audio_pts = getAudioPTSImpl();
+        final int d_apts = audio_pts - audio_scr;
+        return getPerfStringImpl( video_scr, video_pts_last, d_vpts, audio_scr, audio_pts, d_apts, getVideoDPTSAvg() );
+    }
+    private final String getPerfStringImpl(final int video_scr, final int video_pts, final int d_vpts,
+                                           final int audio_scr, final int audio_pts, final int d_apts,
+                                           final int video_dpts_avg_diff) {
+        final float tt = getDuration() / 1000.0f;
+        final String audioSinkInfo;
+        final AudioSink audioSink = getAudioSink();
+        if( null != audioSink ) {
+            audioSinkInfo = "AudioSink[frames [p "+audioSink.getEnqueuedFrameCount()+", q "+audioSink.getQueuedFrameCount()+", f "+audioSink.getFreeFrameCount()+", c "+audioSink.getFrameCount()+"], time "+audioSink.getQueuedTime()+", bytes "+audioSink.getQueuedByteCount()+"]";
+        } else {
+            audioSinkInfo = "";
+        }
+        final int freeVideoFrames, decVideoFrames;
+        if( null != videoFramesFree ) {
+            freeVideoFrames = videoFramesFree.size();
+            decVideoFrames = videoFramesDecoded.size();
+        } else {
+            freeVideoFrames = 0;
+            decVideoFrames = 0;
+        }
+        return state+", frames[(p "+presentedFrameCount+", d "+decodedFrameCount+") / "+videoFrames+", "+tt+" s, z "+nullFrameCount+" / "+maxNullFrameCountUntilEOS+"], "+
+               "speed " + playSpeed+", dAV "+( d_vpts - d_apts )+", vSCR "+video_scr+", vpts "+video_pts+", dSCR["+d_vpts+", avrg "+video_dpts_avg_diff+"], "+
+               "aSCR "+audio_scr+", apts "+audio_pts+" ( "+d_apts+" ), "+audioSinkInfo+
+               ", Texture[count "+textureCount+", free "+freeVideoFrames+", dec "+decVideoFrames+"]";
     }
 
     @Override
@@ -557,13 +1588,30 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     }
 
     @Override
-    public final synchronized GLMediaEventListener[] getEventListeners() {
+    public final GLMediaEventListener[] getEventListeners() {
         synchronized(eventListenersLock) {
             return eventListeners.toArray(new GLMediaEventListener[eventListeners.size()]);
         }
     }
 
-    private Object eventListenersLock = new Object();
+    private final Object eventListenersLock = new Object();
+
+    @Override
+    public final Object getAttachedObject(String name) {
+        return attachedObjects.get(name);
+    }
+
+    @Override
+    public final Object attachObject(String name, Object obj) {
+        return attachedObjects.put(name, obj);
+    }
+
+    @Override
+    public final Object detachObject(String name) {
+        return attachedObjects.remove(name);
+    }
+
+    private final HashMap<String, Object> attachedObjects = new HashMap<String, Object>();
 
     protected static final String toHexString(long v) {
         return "0x"+Long.toHexString(v);
@@ -571,5 +1619,15 @@ public abstract class GLMediaPlayerImpl implements GLMediaPlayer {
     protected static final String toHexString(int v) {
         return "0x"+Integer.toHexString(v);
     }
-        
-}
\ No newline at end of file
+    protected static final int getPropIntVal(Map<String, String> props, String key) {
+        final String val = props.get(key);
+        try {
+            return Integer.valueOf(val).intValue();
+        } catch (NumberFormatException nfe) {
+            if(DEBUG) {
+                System.err.println("Not a valid integer for <"+key+">: <"+val+">");
+            }
+        }
+        return 0;
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java b/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java
new file mode 100644
index 000000000..6e006d9c0
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/JavaSoundAudioSink.java
@@ -0,0 +1,229 @@
+package jogamp.opengl.util.av;
+
+import java.nio.ByteBuffer;
+import java.util.Arrays;
+
+import javax.sound.sampled.AudioSystem;
+import javax.sound.sampled.DataLine;
+import javax.sound.sampled.SourceDataLine;
+
+import com.jogamp.opengl.util.av.AudioSink;
+
+/***
+ * JavaSound Audio Sink
+ * <p>
+ * FIXME: Parameterize .. all configs .. best via an init-method, passing requested
+ * audio capabilities
+ * </p>
+ */
+public class JavaSoundAudioSink implements AudioSink {
+
+    // Chunk of audio processed at one time
+    public static final int BUFFER_SIZE = 1000;
+    public static final int SAMPLES_PER_BUFFER = BUFFER_SIZE / 2;
+    private static final boolean staticAvailable;
+
+    // Sample time values
+    // public static final double SAMPLE_TIME_IN_SECS = 1.0 / DEFAULT_SAMPLE_RATE;
+    // public static final double BUFFER_TIME_IN_SECS = SAMPLE_TIME_IN_SECS * SAMPLES_PER_BUFFER;
+
+    private javax.sound.sampled.AudioFormat format;
+    private DataLine.Info info;
+    private SourceDataLine auline;
+    private int bufferCount;
+    private byte [] sampleData = new byte[BUFFER_SIZE];
+    private boolean initialized = false;
+    private AudioSink.AudioFormat chosenFormat = null;
+
+    private volatile boolean playRequested = false;
+    private float volume = 1.0f;
+
+    static {
+        boolean ok = false;
+        try {
+            AudioSystem.getAudioFileTypes();
+            ok = true;
+        } catch (Throwable t) {
+
+        }
+        staticAvailable=ok;
+    }
+
+    @Override
+    public String toString() {
+        return "JavaSoundSink[init "+initialized+", dataLine "+info+", source "+auline+", bufferCount "+bufferCount+
+               ", chosen "+chosenFormat+", jsFormat "+format;
+    }
+
+    @Override
+    public final float getPlaySpeed() { return 1.0f; } // FIXME
+
+    @Override
+    public final boolean setPlaySpeed(float rate) {
+        return false; // FIXME
+    }
+
+    @Override
+    public final float getVolume() {
+        // FIXME
+        return volume;
+    }
+
+    @Override
+    public final boolean setVolume(float v) {
+        // FIXME
+        volume = v;
+        return true;
+    }
+
+    @Override
+    public AudioSink.AudioFormat getPreferredFormat() {
+        return DefaultFormat;
+    }
+
+    @Override
+    public final int getMaxSupportedChannels() {
+        return 2;
+    }
+
+    @Override
+    public final boolean isSupported(AudioSink.AudioFormat format) {
+        return true;
+    }
+
+    @Override
+    public boolean init(AudioSink.AudioFormat requestedFormat, float frameDuration, int initialQueueSize, int queueGrowAmount, int queueLimit) {
+        if( !staticAvailable ) {
+            return false;
+        }
+        // Create the audio format we wish to use
+        format = new javax.sound.sampled.AudioFormat(requestedFormat.sampleRate, requestedFormat.sampleSize, requestedFormat.channelCount, requestedFormat.signed, !requestedFormat.littleEndian);
+
+        // Create dataline info object describing line format
+        info = new DataLine.Info(SourceDataLine.class, format);
+
+        // Clear buffer initially
+        Arrays.fill(sampleData, (byte) 0);
+        try{
+            // Get line to write data to
+            auline = (SourceDataLine) AudioSystem.getLine(info);
+            auline.open(format);
+            auline.start();
+            System.out.println("JavaSound audio sink");
+            initialized=true;
+            chosenFormat = requestedFormat;
+        } catch (Exception e) {
+            initialized=false;
+        }
+        return true;
+    }
+
+    @Override
+    public boolean isPlaying() {
+        return playRequested && auline.isRunning();
+    }
+
+    @Override
+    public void play() {
+        if( null != auline ) {
+            playRequested = true;
+            playImpl();
+        }
+    }
+    private void playImpl() {
+        if( playRequested && !auline.isRunning() ) {
+            auline.start();
+        }
+    }
+
+    @Override
+    public void pause() {
+        if( null != auline ) {
+            playRequested = false;
+            auline.stop();
+        }
+    }
+
+    @Override
+    public void flush() {
+        if( null != auline ) {
+            playRequested = false;
+            auline.stop();
+            auline.flush();
+        }
+    }
+
+    @Override
+    public final int getEnqueuedFrameCount() {
+        return 0; // FIXME
+    }
+
+    @Override
+    public int getFrameCount() {
+        return 1;
+    }
+
+    @Override
+    public int getQueuedFrameCount() {
+        return 0;
+    }
+
+    @Override
+    public boolean isInitialized() {
+        return initialized;
+    }
+
+    @Override
+    public void destroy() {
+        initialized = false;
+        chosenFormat = null;
+        // FIXEM: complete code!
+    }
+
+    @Override
+    public AudioFrame enqueueData(AudioDataFrame audioDataFrame) {
+        int byteSize = audioDataFrame.getByteSize();
+        final ByteBuffer byteBuffer = audioDataFrame.getData();
+        final byte[] bytes = new byte[byteSize];
+        final int p = byteBuffer.position();
+        byteBuffer.get(bytes, 0, byteSize);
+        byteBuffer.position(p);
+
+        int written = 0;
+        int len;
+        while (byteSize > 0) {
+            len = auline.write(bytes, written, byteSize);
+            byteSize -= len;
+            written += len;
+        }
+        playImpl();
+        return audioDataFrame;
+    }
+
+    @Override
+    public AudioFrame enqueueData(int pts, ByteBuffer bytes, int byteCount) {
+        return enqueueData(new AudioDataFrame(pts, chosenFormat.getBytesDuration(byteCount), bytes, byteCount));
+    }
+
+    @Override
+    public int getQueuedByteCount() {
+        return auline.getBufferSize() - auline.available();
+    }
+
+    @Override
+    public int getFreeFrameCount() {
+        return auline.available();
+    }
+
+    @Override
+    public int getQueuedTime() {
+        return getQueuedTimeImpl( getQueuedByteCount() );
+    }
+    private final int getQueuedTimeImpl(int byteCount) {
+        final int bytesPerSample = chosenFormat.sampleSize >>> 3; // /8
+        return byteCount / ( chosenFormat.channelCount * bytesPerSample * ( chosenFormat.sampleRate / 1000 ) );
+    }
+
+    @Override
+    public final int getPTS() { return 0; } // FIXME
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java b/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java
new file mode 100644
index 000000000..8d3dbdf44
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/NullAudioSink.java
@@ -0,0 +1,129 @@
+package jogamp.opengl.util.av;
+
+
+import java.nio.ByteBuffer;
+
+import com.jogamp.opengl.util.av.AudioSink;
+
+public class NullAudioSink implements AudioSink {
+
+    @Override
+    public boolean isInitialized() {
+        return true;
+    }
+
+    private volatile float playSpeed = 1.0f;
+    private volatile boolean playRequested = false;
+    private float volume = 1.0f;
+
+    @Override
+    public final float getPlaySpeed() { return playSpeed; }
+
+    @Override
+    public final boolean setPlaySpeed(float rate) {
+        if( Math.abs(1.0f - rate) < 0.01f ) {
+            rate = 1.0f;
+        }
+        playSpeed = rate;
+        return true;
+    }
+
+    @Override
+    public final float getVolume() {
+        // FIXME
+        return volume;
+    }
+
+    @Override
+    public final boolean setVolume(float v) {
+        // FIXME
+        volume = v;
+        return true;
+    }
+
+    @Override
+    public AudioFormat getPreferredFormat() {
+        return DefaultFormat;
+    }
+
+    @Override
+    public final int getMaxSupportedChannels() {
+        return 8;
+    }
+
+    @Override
+    public final boolean isSupported(AudioFormat format) {
+        return true;
+    }
+
+    @Override
+    public boolean init(AudioFormat requestedFormat, float frameDuration, int initialQueueSize, int queueGrowAmount, int queueLimit) {
+        return true;
+    }
+
+    @Override
+    public boolean isPlaying() {
+        return playRequested;
+    }
+
+    @Override
+    public void play() {
+        playRequested = true;
+    }
+
+    @Override
+    public void pause() {
+        playRequested = false;
+    }
+
+    @Override
+    public void flush() {
+    }
+
+    @Override
+    public void destroy() {
+    }
+
+    @Override
+    public final int getEnqueuedFrameCount() {
+        return 0;
+    }
+
+    @Override
+    public int getFrameCount() {
+        return 0;
+    }
+
+    @Override
+    public int getQueuedFrameCount() {
+        return 0;
+    }
+
+    @Override
+    public int getQueuedByteCount() {
+        return 0;
+    }
+
+    @Override
+    public int getQueuedTime() {
+        return 0;
+    }
+
+    @Override
+    public final int getPTS() { return 0; }
+
+    @Override
+    public int getFreeFrameCount() {
+        return 1;
+    }
+
+    @Override
+    public AudioFrame enqueueData(AudioDataFrame audioDataFrame) {
+        return null;
+    }
+
+    @Override
+    public AudioFrame enqueueData(int pts, ByteBuffer bytes, int byteCount) {
+        return null;
+    }
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/NullGLMediaPlayer.java b/src/jogl/classes/jogamp/opengl/util/av/NullGLMediaPlayer.java
index 3d740d6b2..79129e563 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/NullGLMediaPlayer.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/NullGLMediaPlayer.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -32,12 +32,15 @@ import java.net.URLConnection;
 import java.nio.ByteBuffer;
 
 import javax.media.opengl.GL;
+import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
 import jogamp.opengl.util.av.GLMediaPlayerImpl;
 
 import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.IOUtil;
+import com.jogamp.opengl.util.av.GLMediaPlayer;
 import com.jogamp.opengl.util.texture.Texture;
 import com.jogamp.opengl.util.texture.TextureData;
 import com.jogamp.opengl.util.texture.TextureIO;
@@ -49,114 +52,126 @@ import com.jogamp.opengl.util.texture.TextureSequence;
  */
 public class NullGLMediaPlayer extends GLMediaPlayerImpl {
     private TextureData texData = null;
-    private TextureSequence.TextureFrame frame = null;
     private int pos_ms = 0;
-    private int pos_start = 0;
-    
+    private long pos_start = 0;
+
     public NullGLMediaPlayer() {
         super();
-        this.setTextureCount(1);
+
     }
 
     @Override
-    protected boolean setPlaySpeedImpl(float rate) {
+    protected final boolean setPlaySpeedImpl(float rate) {
         return false;
     }
 
     @Override
-    protected boolean startImpl() {
-        pos_start = (int)System.currentTimeMillis();
+    protected final boolean playImpl() {
+        pos_start = Platform.currentTimeMillis();
         return true;
     }
 
     @Override
-    protected boolean pauseImpl() {
+    protected final boolean pauseImpl() {
         return true;
     }
 
     @Override
-    protected boolean stopImpl() {
-        return true;
-    }
-    
-    @Override
-    protected int seekImpl(int msec) {
+    protected final int seekImpl(int msec) {
         pos_ms = msec;
         validatePos();
         return pos_ms;
     }
-    
-    @Override
-    protected TextureSequence.TextureFrame getLastTextureImpl() {
-        return frame;
-    }
 
     @Override
-    protected TextureSequence.TextureFrame getNextTextureImpl(GL gl, boolean blocking) {
-        return frame;
+    protected final int getNextTextureImpl(GL gl, TextureFrame nextFrame) {
+        final int pts = getAudioPTSImpl();
+        nextFrame.setPTS( pts );
+        return pts;
     }
-    
+
     @Override
-    protected int getCurrentPositionImpl() {
-        pos_ms = (int)System.currentTimeMillis() - pos_start;
+    protected final int getAudioPTSImpl() {
+        pos_ms = (int) ( Platform.currentTimeMillis() - pos_start );
         validatePos();
         return pos_ms;
     }
 
     @Override
-    protected void destroyImpl(GL gl) {
+    protected final void destroyImpl(GL gl) {
+        if(null != texData) {
+            texData.destroy();
+            texData = null;
+        }
     }
-    
-    @Override
-    protected void initGLStreamImpl(GL gl, int[] texNames) throws IOException {
+
+    public final static TextureData createTestTextureData() {
+        TextureData res = null;
         try {
-            URLConnection urlConn = IOUtil.getResource("jogl/util/data/av/test-ntsc01-160x90.png", NullGLMediaPlayer.class.getClassLoader());
+            URLConnection urlConn = IOUtil.getResource("jogl/util/data/av/test-ntsc01-57x32.png", NullGLMediaPlayer.class.getClassLoader());
             if(null != urlConn) {
-                texData = TextureIO.newTextureData(GLProfile.getGL2ES2(), urlConn.getInputStream(), false, TextureIO.PNG);
+                res = TextureIO.newTextureData(GLProfile.getGL2ES2(), urlConn.getInputStream(), false, TextureIO.PNG);
             }
         } catch (Exception e) {
             e.printStackTrace();
         }
-        if(null != texData) {
-            width = texData.getWidth();
-            height = texData.getHeight();            
-        } else {
-            width = 640;
-            height = 480;
-            ByteBuffer buffer = Buffers.newDirectByteBuffer(width*height*4);
+        if(null == res) {
+            final int w = 160;
+            final int h =  90;
+            ByteBuffer buffer = Buffers.newDirectByteBuffer(w*h*4);
             while(buffer.hasRemaining()) {
                 buffer.put((byte) 0xEA); buffer.put((byte) 0xEA); buffer.put((byte) 0xEA); buffer.put((byte) 0xEA);
             }
             buffer.rewind();
-            texData = new TextureData(GLProfile.getGL2ES2(),
-                   GL.GL_RGBA, width, height, 0,
-                   GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, false, 
+            res = new TextureData(GLProfile.getGL2ES2(),
+                   GL.GL_RGBA, w, h, 0,
+                   GL.GL_RGBA, GL.GL_UNSIGNED_BYTE, false,
                    false, false, buffer, null);
         }
-        fps = 24f;
-        duration = 10*60*1000; // msec
-        totalFrames = (int) ( (duration/1000)*fps );
-        vcodec = "png-static";
+        return res;
+    }
+
+    @Override
+    protected final void initStreamImpl(int vid, int aid) throws IOException {
+        texData = createTestTextureData();
+        final float _fps = 24f;
+        final int _duration = 10*60*1000; // msec
+        final int _totalFrames = (int) ( (_duration/1000)*_fps );
+        updateAttributes(0 /* fake */, GLMediaPlayer.STREAM_ID_NONE,
+                         texData.getWidth(), texData.getHeight(), 0,
+                         0, 0, _fps,
+                         _totalFrames, 0, _duration, "png-static", null);
+    }
+    @Override
+    protected final void initGLImpl(GL gl) throws IOException, GLException {
+        isInGLOrientation = true;
+    }
+
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Returns {@link GLMediaPlayer#TEXTURE_COUNT_MIN}.
+     * </p>
+     */
+    @Override
+    protected int validateTextureCount(int desiredTextureCount) {
+        return TEXTURE_COUNT_MIN;
     }
-    
+
     @Override
-    protected TextureSequence.TextureFrame createTexImage(GL gl, int idx, int[] tex) {
-        Texture texture = super.createTexImageImpl(gl, idx, tex, width, height, false);
+    protected final TextureSequence.TextureFrame createTexImage(GL gl, int texName) {
+        final Texture texture = super.createTexImageImpl(gl, texName, width, height);
         if(null != texData) {
             texture.updateImage(gl, texData);
-            texData.destroy();
-            texData = null;
-        }                      
-        frame = new TextureSequence.TextureFrame( texture );
-        return frame;
+        }
+        return new TextureSequence.TextureFrame( texture );
     }
-    
+
     @Override
-    protected void destroyTexImage(GL gl, TextureSequence.TextureFrame imgTex) {
-        frame = null;
-        super.destroyTexImage(gl, imgTex);
+    protected final void destroyTexFrame(GL gl, TextureSequence.TextureFrame frame) {
+        super.destroyTexFrame(gl, frame);
     }
-    
+
     private void validatePos() {
         boolean considerPausing = false;
         if( 0 > pos_ms) {
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java
index ce9df21cf..a6a6fba97 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,20 +20,20 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.util.av.impl;
 
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
-import java.util.Map;
 import java.util.Set;
 
 import javax.media.opengl.GLProfile;
@@ -41,208 +41,377 @@ import javax.media.opengl.GLProfile;
 import com.jogamp.common.os.DynamicLibraryBundle;
 import com.jogamp.common.os.DynamicLibraryBundleInfo;
 import com.jogamp.common.util.RunnableExecutor;
+import com.jogamp.common.util.VersionNumber;
 
 /**
- * FIXME: We need native structure access methods to deal with API changes
- *        in the libav headers, which break binary compatibility!
- *        Currently we are binary compatible w/ [0.6 ?, ] 0.7 and 0.8 but not w/ trunk.
- *        
- *        ChangeList for trunk:
- *          Thu Jan 12 11:21:02 2012 a17479dfce67fbea2d0a1bf303010dce1e79059f major 53 -> 54
- *          Mon Feb 27 22:40:11 2012 ee42df8a35c2b795f524c856834d0823dbd4e75d reorder AVStream and AVFormatContext
- *          Tue Feb 28 12:07:53 2012 322537478b63c6bc01e640643550ff539864d790 minor  1 ->  2
+ * See {@link FFMPEGMediaPlayer#compatibility}.
  */
 class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
-    private static List<String> glueLibNames = new ArrayList<String>(); // none
-    
-    private static final int symbolCount = 31;
-    private static String[] symbolNames = {
-         "avcodec_version",
+    private static final boolean DEBUG = FFMPEGMediaPlayer.DEBUG || DynamicLibraryBundleInfo.DEBUG;
+
+    private static final List<String> glueLibNames = new ArrayList<String>(); // none
+
+    private static final int symbolCount = 65;
+    private static final String[] symbolNames = {
+         "avutil_version",
          "avformat_version",
-/* 3 */  "avutil_version",
-        
+         "avcodec_version",
+         "avresample_version",
+/* 5 */  "swresample_version",
+
          // libavcodec
-         "avcodec_close", 
-         "avcodec_string", 
-         "avcodec_find_decoder", 
-         "avcodec_open2",             // 53.6.0    (opt) 
-         "avcodec_open", 
-         "avcodec_alloc_frame", 
-         "avcodec_default_get_buffer", 
-         "avcodec_default_release_buffer", 
-         "av_free_packet", 
+         "avcodec_register_all",
+         "avcodec_close",
+         "avcodec_string",
+         "avcodec_find_decoder",
+         "avcodec_open2",             // 53.6.0    (opt)
+         "avcodec_alloc_frame",
+         "avcodec_get_frame_defaults",
+         "avcodec_free_frame",        // 54.28.0   (opt)
+         "avcodec_default_get_buffer",     // <= 54 (opt), else sp_avcodec_default_get_buffer2
+         "avcodec_default_release_buffer", // <= 54 (opt), else sp_av_frame_unref
+         "avcodec_default_get_buffer2",    // 55 (opt)
+         "avcodec_get_edge_width",
+         "av_image_fill_linesizes",
+         "avcodec_align_dimensions",
+         "avcodec_align_dimensions2",
+         "avcodec_flush_buffers",
+         "av_init_packet",
+         "av_new_packet",
+         "av_destruct_packet",
+         "av_free_packet",
          "avcodec_decode_audio4",     // 53.25.0   (opt)
-         "avcodec_decode_audio3",     // 52.23.0
-/* 15 */ "avcodec_decode_video2",     // 52.23.0
-        
+/* 27 */ "avcodec_decode_video2",     // 52.23.0
+
          // libavutil
-         "av_pix_fmt_descriptors", 
-         "av_free", 
-/* 18 */ "av_get_bits_per_pixel",
-        
+         "av_pix_fmt_descriptors",
+         "av_frame_unref",            // 55.0.0 (opt)
+         "av_realloc",
+         "av_free",
+         "av_get_bits_per_pixel",
+         "av_samples_get_buffer_size",
+         "av_get_bytes_per_sample",   // 51.4.0
+         "av_opt_set_int",            // 51.12.0
+         "av_dict_get",
+         "av_dict_count",             // 54.*      (opt)
+         "av_dict_set",
+/* 28 */ "av_dict_free",
+
          // libavformat
          "avformat_alloc_context",
          "avformat_free_context",     // 52.96.0   (opt)
          "avformat_close_input",      // 53.17.0   (opt)
-         "av_close_input_file",
-         "av_register_all", 
-         "avformat_open_input", 
-         "av_dump_format", 
+         "av_register_all",
+         "av_find_input_format",
+         "avformat_open_input",
+         "av_dump_format",
          "av_read_frame",
          "av_seek_frame",
+         "avformat_seek_file",        // ???       (opt)
+         "av_read_play",
+         "av_read_pause",
          "avformat_network_init",     // 53.13.0   (opt)
          "avformat_network_deinit",   // 53.13.0   (opt)
-         "avformat_find_stream_info", // 53.3.0    (opt)
-/* 29 */ "av_find_stream_info",
-    };
-    
-    // alternate symbol names
-    private static String[][] altSymbolNames = {
-        { "avcodec_open",          "avcodec_open2" },              // old, 53.6.0
-        { "avcodec_decode_audio3", "avcodec_decode_audio4" },      // old, 53.25.0
-        { "av_close_input_file",   "avformat_close_input" },       // old, 53.17.0
-        { "av_find_stream_info",   "avformat_find_stream_info" },  // old, 53.3.0       
+/* 54 */ "avformat_find_stream_info", // 53.3.0    (opt)
+
+         // libavdevice
+/* 55 */ "avdevice_register_all",     // ???
+
+         // libavresample
+         "avresample_alloc_context",  //  1.0.1
+         "avresample_open",
+         "avresample_close",
+         "avresample_free",
+/* 60 */ "avresample_convert",
+
+         // libavresample
+         "av_opt_set_sample_fmt",     // actually lavu .. but exist only w/ swresample!
+         "swr_alloc",
+         "swr_init",
+         "swr_free",
+/* 65 */ "swr_convert",
+
     };
-    
+
     // optional symbol names
-    private static String[] optionalSymbolNames = {
-         "avformat_free_context",     // 52.96.0   (opt)
-         "avformat_network_init",     // 53.13.0   (opt)
-         "avformat_network_deinit",   // 53.13.0   (opt)
+    private static final String[] optionalSymbolNames = {
+         "avformat_seek_file",        // ???       (opt)
+         "avcodec_free_frame",        // 54.28.0   (opt)
+         "av_frame_unref",            // 55.0.0 (opt)
+         "av_dict_count",             // 54.*   (opt)
+         "avcodec_default_get_buffer",     // <= 54 (opt), else sp_avcodec_default_get_buffer2
+         "avcodec_default_release_buffer", // <= 54 (opt), else sp_av_frame_unref
+         "avcodec_default_get_buffer2",    // 55 (opt)
+
+         // libavdevice
+         "avdevice_register_all",     // 53.0.0 (opt)
+
+         // libavresample
+         "avresample_version",        //  1.0.1
+         "avresample_alloc_context",  //  1.0.1
+         "avresample_open",
+         "avresample_close",
+         "avresample_free",
+         "avresample_convert",
+
+         // libavresample
+         "av_opt_set_sample_fmt",     // actually lavu .. but exist only w/ swresample!
+         "swresample_version",        //  0
+         "swr_alloc",
+         "swr_init",
+         "swr_free",
+         "swr_convert",
     };
-    
-    private static long[] symbolAddr;
+
+    private static final long[] symbolAddr = new long[symbolCount];
     private static final boolean ready;
-    
+    private static final boolean libsUFCLoaded;
+    private static final boolean avresampleLoaded;  // optional
+    private static final boolean swresampleLoaded;  // optional
+    private static final boolean avdeviceLoaded; // optional
+    static final VersionNumber avCodecVersion;
+    static final VersionNumber avFormatVersion;
+    static final VersionNumber avUtilVersion;
+    static final VersionNumber avResampleVersion;
+    static final VersionNumber swResampleVersion;
+    private static final FFMPEGNatives natives;
+
+    private static final int LIB_IDX_UTI = 0;
+    private static final int LIB_IDX_FMT = 1;
+    private static final int LIB_IDX_COD = 2;
+    private static final int LIB_IDX_DEV = 3;
+    private static final int LIB_IDX_AVR = 4;
+    private static final int LIB_IDX_SWR = 5;
+
     static {
-        // native ffmpeg media player implementation is included in jogl_desktop and jogl_mobile     
+        // native ffmpeg media player implementation is included in jogl_desktop and jogl_mobile
         GLProfile.initSingleton();
         boolean _ready = false;
+        /** util, format, codec, device, avresample, swresample */
+        boolean[] _loaded= new boolean[6];
+        /** util, format, codec, avresample, swresample */
+        VersionNumber[] _versions = new VersionNumber[5];
         try {
-            _ready = initSymbols();
+            _ready = initSymbols(_loaded, _versions);
         } catch (Throwable t) {
             t.printStackTrace();
         }
-        ready = _ready;
-        if(!ready) {
-            System.err.println("FFMPEG: Not Available");
+        libsUFCLoaded = _loaded[LIB_IDX_UTI] && _loaded[LIB_IDX_FMT] && _loaded[LIB_IDX_COD];
+        avdeviceLoaded = _loaded[LIB_IDX_DEV];
+        avresampleLoaded = _loaded[LIB_IDX_AVR];
+        swresampleLoaded = _loaded[LIB_IDX_SWR];
+        avUtilVersion = _versions[0];
+        avFormatVersion = _versions[1];
+        avCodecVersion = _versions[2];
+        avResampleVersion = _versions[3];
+        swResampleVersion = _versions[4];
+        if(!libsUFCLoaded) {
+            System.err.println("LIB_AV Not Available: lavu, lavc, lavu");
+            natives = null;
+            ready = false;
+        } else if(!_ready) {
+            System.err.println("LIB_AV Not Matching");
+            natives = null;
+            ready = false;
+        } else {
+            if( avCodecVersion.getMajor() == 53 && avFormatVersion.getMajor() == 53 && avUtilVersion.getMajor() == 51 ) {
+                // lavc53.lavf53.lavu51
+                natives = new FFMPEGv08Natives();
+            } else if( avCodecVersion.getMajor() == 54 && avFormatVersion.getMajor() == 54 && avUtilVersion.getMajor() == 52 ) {
+                // lavc54.lavf54.lavu52.lavr01
+                natives = new FFMPEGv09Natives();
+            } else if( avCodecVersion.getMajor() == 55 && avFormatVersion.getMajor() == 55 && avUtilVersion.getMajor() == 52 ) {
+                // lavc55.lavf55.lavu52.lavr01
+                natives = new FFMPEGv10Natives();
+            } else {
+                System.err.println("LIB_AV No Version/Native-Impl Match");
+                natives = null;
+            }
+            if( null != natives && FFMPEGStaticNatives.initIDs0() ) {
+                ready = natives.initSymbols0(symbolAddr, symbolCount);
+            } else {
+                ready = false;
+            }
         }
     }
-    
+
+    static boolean libsLoaded() { return libsUFCLoaded; }
+    static boolean avDeviceLoaded() { return avdeviceLoaded; }
+    static boolean avResampleLoaded() { return avresampleLoaded; }
+    static boolean swResampleLoaded() { return swresampleLoaded; }
+    static FFMPEGNatives getNatives() { return natives; }
     static boolean initSingleton() { return ready; }
-    
-    private static boolean initSymbols() {
-        final DynamicLibraryBundle dl = new DynamicLibraryBundle(new FFMPEGDynamicLibraryBundleInfo());
-        final boolean avutilLoaded = dl.isToolLibLoaded(0); 
-        final boolean avformatLoaded = dl.isToolLibLoaded(1);
-        final boolean avcodecLoaded = dl.isToolLibLoaded(2);
-        if(!avutilLoaded || !avformatLoaded || !avcodecLoaded) {
-            throw new RuntimeException("FFMPEG Tool library incomplete: [ avutil "+avutilLoaded+", avformat "+avformatLoaded+", avcodec "+avcodecLoaded+"]");
-        }        
-        if(!dl.isToolLibComplete()) {
-            throw new RuntimeException("FFMPEG Tool libraries incomplete");
+
+    /**
+     * @param loaded 6: util, format, codec, device, avresample, swresample
+     * @param versions 5: util, format, codec, avresample, swresample
+     * @return
+     */
+    private static final boolean initSymbols(boolean[] loaded, VersionNumber[] versions) {
+        for(int i=0; i<6; i++) {
+            loaded[i] = false;
+        }
+        final DynamicLibraryBundle dl = AccessController.doPrivileged(new PrivilegedAction<DynamicLibraryBundle>() {
+                                          @Override
+                                          public DynamicLibraryBundle run() {
+                                              return new DynamicLibraryBundle(new FFMPEGDynamicLibraryBundleInfo());
+                                          } } );
+        dl.toString();
+        for(int i=0; i<6; i++) {
+            loaded[i] = dl.isToolLibLoaded(i);
+        }
+        if( !loaded[LIB_IDX_UTI] || !loaded[LIB_IDX_FMT] || !loaded[LIB_IDX_COD] ) {
+            throw new RuntimeException("FFMPEG Tool library incomplete: [ avutil "+loaded[LIB_IDX_UTI]+", avformat "+loaded[LIB_IDX_FMT]+", avcodec "+loaded[LIB_IDX_COD]+"]");
         }
         if(symbolNames.length != symbolCount) {
             throw new InternalError("XXX0 "+symbolNames.length+" != "+symbolCount);
         }
-        symbolAddr = new long[symbolCount];        
-        
+
         // optional symbol name set
         final Set<String> optionalSymbolNameSet = new HashSet<String>();
         optionalSymbolNameSet.addAll(Arrays.asList(optionalSymbolNames));
-        
-        // alternate symbol name mapping to indexed array
-        final Map<String, Integer> mAltSymbolNames = new HashMap<String, Integer>();
-        final int[][] iAltSymbolNames = new int[altSymbolNames.length][];
-        {
-            final List<String> symbolNameList = Arrays.asList(symbolNames);
-            for(int i=0; i<altSymbolNames.length; i++) {
-                iAltSymbolNames[i] = new int[altSymbolNames[i].length];        
-                for(int j=0; j<altSymbolNames[i].length; j++) {
-                    mAltSymbolNames.put(altSymbolNames[i][j], new Integer(i));
-                    iAltSymbolNames[i][j] = symbolNameList.indexOf(altSymbolNames[i][j]); 
-                }            
-            }
-        }
-        
+
         // lookup
-        for(int i = 0; i<symbolCount; i++) {
-            symbolAddr[i] = dl.dynamicLookupFunction(symbolNames[i]);
-        }        
-        
+        AccessController.doPrivileged(new PrivilegedAction<Object>() {
+            @Override
+            public Object run() {
+                for(int i = 0; i<symbolCount; i++) {
+                    symbolAddr[i] = dl.dynamicLookupFunction(symbolNames[i]);
+                }
+                return null;
+            } } );
+
         // validate results
+        boolean res = true;
         for(int i = 0; i<symbolCount; i++) {
             if( 0 == symbolAddr[i] ) {
                 // no symbol, check optional and alternative symbols
                 final String symbol = symbolNames[i];
                 if ( !optionalSymbolNameSet.contains(symbol) ) {
-                    // check for API changed symbols
-                    boolean ok = false;                    
-                    final Integer cI = mAltSymbolNames.get(symbol);
-                    if ( null != cI ) {
-                        // check whether alternative symbol is available
-                        final int ci = cI.intValue();
-                        for(int j=0; !ok && j<iAltSymbolNames[ci].length; j++) {
-                            final int si = iAltSymbolNames[ci][j];
-                            ok = 0 != symbolAddr[si];
-                            if(ok && (true || DEBUG )) { // keep it verbose per default for now ..
-                                System.err.println("OK: Unresolved symbol <"+symbol+">, but has alternative <"+symbolNames[si]+">");
-                            }
-                        }
-                    }
-                    if(!ok) {
-                        System.err.println("Fail: Could not resolve symbol <"+symbolNames[i]+">: not optional, no alternatives.");
-                        return false;
-                    }
-                } else if(true || DEBUG ) { // keep it verbose per default for now ..
+                    System.err.println("Fail: Could not resolve symbol <"+symbolNames[i]+">: not optional, no alternatives.");
+                    res = false;
+                } else if(DEBUG) {
                     System.err.println("OK: Unresolved optional symbol <"+symbolNames[i]+">");
                 }
             }
         }
-        return initSymbols0(symbolAddr, symbolCount);
+        versions[0] = FFMPEGStaticNatives.getAVVersion(FFMPEGStaticNatives.getAvVersion0(symbolAddr[0]));
+        versions[1] = FFMPEGStaticNatives.getAVVersion(FFMPEGStaticNatives.getAvVersion0(symbolAddr[1]));
+        versions[2] = FFMPEGStaticNatives.getAVVersion(FFMPEGStaticNatives.getAvVersion0(symbolAddr[2]));
+        versions[3] = FFMPEGStaticNatives.getAVVersion(FFMPEGStaticNatives.getAvVersion0(symbolAddr[3]));
+        versions[4] = FFMPEGStaticNatives.getAVVersion(FFMPEGStaticNatives.getAvVersion0(symbolAddr[4]));
+
+        return res;
     }
-    
+
     protected FFMPEGDynamicLibraryBundleInfo() {
     }
 
     @Override
-    public boolean shallLinkGlobal() { return true; }
+    public final boolean shallLinkGlobal() { return true; }
 
+    /**
+     * {@inheritDoc}
+     * <p>
+     * Returns <code>true</code>.
+     * </p>
+     */
     @Override
-    public boolean shallLookupGlobal() { return true; }
-    
+    public final boolean shallLookupGlobal() {
+        return true;
+    }
+
     @Override
     public final List<String> getGlueLibNames() {
         return glueLibNames;
     }
 
     @Override
-    public List<List<String>> getToolLibNames() {
+    public final List<List<String>> getToolLibNames() {
         List<List<String>> libsList = new ArrayList<List<String>>();
 
+        // 6: util, format, codec, device, avresample, swresample
+
         final List<String> avutil = new ArrayList<String>();
         avutil.add("avutil");        // default
-        avutil.add("avutil-52");     // dummy future proof
+
+        avutil.add("libavutil.so.53");     // dummy future proof
+        avutil.add("libavutil.so.52");     // ffmpeg 1.2 + 2 / libav 9 + 10
+        avutil.add("libavutil.so.51");     // 0.8
+        avutil.add("libavutil.so.50");     // 0.7
+
+        avutil.add("avutil-53");     // dummy future proof
+        avutil.add("avutil-52");     // ffmpeg 1.2 + 2 / libav 9 + 10
         avutil.add("avutil-51");     // 0.8
         avutil.add("avutil-50");     // 0.7
         libsList.add(avutil);
-        
+
         final List<String> avformat = new ArrayList<String>();
         avformat.add("avformat");    // default
-        avformat.add("avformat-55"); // dummy future proof
-        avformat.add("avformat-54"); // 0.?
+
+        avformat.add("libavformat.so.56"); // dummy future proof
+        avformat.add("libavformat.so.55"); // ffmpeg 2 / libav 10
+        avformat.add("libavformat.so.54"); // ffmpeg 1.2 / libav 9
+        avformat.add("libavformat.so.53"); // 0.8
+        avformat.add("libavformat.so.52"); // 0.7
+
+        avformat.add("avformat-56"); // dummy future proof
+        avformat.add("avformat-55"); // ffmpeg 2 / libav 10
+        avformat.add("avformat-54"); // ffmpeg 1.2 / libav 9
         avformat.add("avformat-53"); // 0.8
         avformat.add("avformat-52"); // 0.7
         libsList.add(avformat);
-        
+
         final List<String> avcodec = new ArrayList<String>();
         avcodec.add("avcodec");      // default
-        avcodec.add("avcodec-55");   // dummy future proof
-        avcodec.add("avcodec-54");   // 0.?
+
+        avcodec.add("libavcodec.so.56");   // dummy future proof
+        avcodec.add("libavcodec.so.55");   // ffmpeg 2/ libav 10
+        avcodec.add("libavcodec.so.54");   // ffmpeg 1.2 / libav 9
+        avcodec.add("libavcodec.so.53");   // 0.8
+        avcodec.add("libavcodec.so.52");   // 0.7
+
+        avcodec.add("avcodec-56");   // dummy future proof
+        avcodec.add("avcodec-55");   // ffmpeg 2/ libav 10
+        avcodec.add("avcodec-54");   // ffmpeg 1.2 / libav 9
         avcodec.add("avcodec-53");   // 0.8
         avcodec.add("avcodec-52");   // 0.7
         libsList.add(avcodec);
-                
+
+        final List<String> avdevice = new ArrayList<String>();
+        avdevice.add("avdevice");        // default
+
+        avdevice.add("libavdevice.so.56");     // dummy future proof
+        avdevice.add("libavdevice.so.55");     // ffmpeg 2
+        avdevice.add("libavdevice.so.54");     // ffmpeg 1.2 / libav 10
+        avdevice.add("libavdevice.so.53");     // 0.8 && libav 9
+
+        avdevice.add("avdevice-56");     // dummy future proof
+        avdevice.add("avdevice-55");     // ffmpeg 2
+        avdevice.add("avdevice-54");     // ffmpeg 1.2 / libav 10
+        avdevice.add("avdevice-53");     // 0.8 && libav 9
+        libsList.add(avdevice);
+
+        final List<String> avresample = new ArrayList<String>();
+        avresample.add("avresample");        // default
+
+        avresample.add("libavresample.so.2");     // dummy future proof
+        avresample.add("libavresample.so.1");     // libav 9 + 10
+
+        avresample.add("avresample-2");     // dummy future proof
+        avresample.add("avresample-1");     // libav 9 + 10
+        libsList.add(avresample);
+
+        final List<String> swresample = new ArrayList<String>();
+        swresample.add("swresample");        // default
+
+        swresample.add("libswresample.so.1");     // dummy future proof
+        swresample.add("libswresample.so.0");     // ffmpeg 1.2 + 2.x
+
+        swresample.add("swresample-1");     // dummy future proof
+        swresample.add("swresample-0");     // ffmpeg 1.2 + 2.x
+        libsList.add(swresample);
+
         return libsList;
     }
 
@@ -257,14 +426,12 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
     }
 
     @Override
-    public boolean useToolGetProcAdressFirst(String funcName) {
+    public final boolean useToolGetProcAdressFirst(String funcName) {
         return false;
     }
 
     @Override
-    public RunnableExecutor getLibLoaderExecutor() {
+    public final RunnableExecutor getLibLoaderExecutor() {
         return DynamicLibraryBundle.getDefaultRunnableExecutor();
-    }    
-    
-    private static native boolean initSymbols0(long[] symbols, int count);
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
index 7d10cff4d..344ba48ee 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -29,514 +29,797 @@
 package jogamp.opengl.util.av.impl;
 
 import java.io.IOException;
-import java.nio.Buffer;
 import java.nio.ByteBuffer;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
 import javax.media.opengl.GLException;
 
+import com.jogamp.common.os.Platform;
+import com.jogamp.common.util.IOUtil;
 import com.jogamp.common.util.VersionNumber;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
+import com.jogamp.opengl.util.TimeFrameI;
 import com.jogamp.opengl.util.GLPixelStorageModes;
+import com.jogamp.opengl.util.av.AudioSink;
+import com.jogamp.opengl.util.av.AudioSink.AudioFormat;
+import com.jogamp.opengl.util.av.AudioSinkFactory;
+import com.jogamp.opengl.util.av.GLMediaPlayer;
 import com.jogamp.opengl.util.texture.Texture;
-import com.jogamp.opengl.util.texture.TextureSequence;
 
 import jogamp.opengl.GLContextImpl;
-import jogamp.opengl.es1.GLES1ProcAddressTable;
-import jogamp.opengl.es2.GLES2ProcAddressTable;
-import jogamp.opengl.gl4.GL4bcProcAddressTable;
-import jogamp.opengl.util.av.EGLMediaPlayerImpl;
+import jogamp.opengl.util.av.GLMediaPlayerImpl;
+import jogamp.opengl.util.av.impl.FFMPEGNatives.PixelFormat;
+import jogamp.opengl.util.av.impl.FFMPEGNatives.SampleFormat;
 
 /***
  * Implementation utilizes <a href="http://libav.org/">Libav</a>
- * or  <a href="http://ffmpeg.org/">FFmpeg</a> which is ubiquitous
- * available and usually pre-installed on Unix platforms. Due to legal 
- * reasons we cannot deploy binaries of it, which contains patented codecs.
+ * or  <a href="http://ffmpeg.org/">FFmpeg</a> which are ubiquitous
+ * available and usually pre-installed on Unix platforms.
+ * <p>
+ * Due to legal reasons we cannot deploy binaries of it, which contains patented codecs.
+ * </p>
+ * <p>
  * Besides the default BSD/Linux/.. repositories and installations,
- * precompiled binaries can be found at the listed location below. 
+ * precompiled binaries can be found at the
+ * <a href="#libavavail">listed location below</a>.
+ * </p>
+ *
+ * <a name="implspecifics"><h5>Implementation specifics</h5></a>
  * <p>
- * Implements YUV420P to RGB fragment shader conversion 
- * and the usual packed RGB formats.
- * The decoded video frame is written directly into an OpenGL texture 
- * on the GPU in it's native format. A custom fragment shader converts 
- * the native pixelformat to a usable RGB format if required. 
- * Hence only 1 copy is required before bloating the picture 
- * from YUV to RGB, for example.
- * </p> 
+ * The decoded video frame is written directly into an OpenGL texture
+ * on the GPU in it's native format. A custom fragment shader converts
+ * the native pixelformat to a usable <i>RGB</i> format if required.
+ * Hence only 1 copy is required before bloating the picture
+ * from <i>YUV*</i> to <i>RGB</i>, for example.
+ * </p>
  * <p>
- * Utilizes a slim dynamic and native binding to the Lib_av 
+ * Implements pixel format conversion to <i>RGB</i> via
+ * fragment shader texture-lookup functions:
+ * <ul>
+ *   <li>{@link PixelFormat#YUV420P}</li>
+ *   <li>{@link PixelFormat#YUVJ420P}</li>
+ *   <li>{@link PixelFormat#YUV422P}</li>
+ *   <li>{@link PixelFormat#YUVJ422P}</li>
+ *   <li>{@link PixelFormat#YUYV422}</li>
+ *   <li>{@link PixelFormat#BGR24}</li>
+ * </ul>
+ * </p>
+ * <p>
+ *
+ * <a name="libavspecifics"><h5>Libav Specifics</h5></a>
+ * <p>
+ * Utilizes a slim dynamic and native binding to the Lib_av
  * libraries:
  * <ul>
- *   <li>libavutil</li>
- *   <li>libavformat</li>
  *   <li>libavcodec</li>
- * </ul> 
+ *   <li>libavformat</li>
+ *   <li>libavutil</li>
+ *   <li>libavresample (opt)</li>
+ *   <li>libavdevice (opt)</li>
+ * </ul>
+ * </p>
+ *
+ * <a name="compatibility"><h5>LibAV Compatibility</h5></a>
+ * <p>
+ * Currently we are binary compatible w/:
+ * <table border="1">
+ * <tr><th>libav / ffmpeg</th><th>lavc</th><th>lavf</th><th>lavu</th><th>lavr</th>    <th>FFMPEG* class</th></tr>
+ * <tr><td>0.8</td>           <td>53</td>  <td>53</td>  <td>51</td>  <td></td>        <td>FFMPEGv08</td></tr>
+ * <tr><td>9.0 / 1.2</td>     <td>54</td>  <td>54</td>  <td>52</td>  <td>01/00</td>   <td>FFMPEGv09</td></tr>
+ * <tr><td>10 / 2</td>        <td>55</td>  <td>55</td>  <td>52</td>  <td>01/00</td>   <td>FFMPEGv10</td></tr>
+ * </table>
  * </p>
  * <p>
- * http://libav.org/
+ * See http://upstream-tracker.org/versions/libav.html
  * </p>
- * <p> 
- * Check tag 'FIXME: Add more planar formats !' 
+ * <p>
+ * Check tag 'FIXME: Add more planar formats !'
  * here and in the corresponding native code
- * <code>jogl/src/jogl/native/ffmpeg/jogamp_opengl_util_av_impl_FFMPEGMediaPlayer.c</code>
+ * <code>jogl/src/jogl/native/libav/ffmpeg_impl_template.c</code>
  * </p>
+ *
+ *
+ * <a name="todo"><h5>TODO:</h5></a>
  * <p>
- * TODO:
  * <ul>
- *   <li>Audio Output</li>
- *   <li>Off thread <i>next frame</i> processing using multiple target textures</li>
- *   <li>better pts sync handling</li>
- *   <li>fix seek</li>   
- * </ul> 
+ *   <li>better audio synchronization handling? (video is synchronized)</li>
+ * </ul>
  * </p>
- * Pre-compiled Libav / FFmpeg packages:
+ *
+ * <a name="libavavail"><h5>FFMPEG / LibAV Availability</h5></a>
+ * <p>
  * <ul>
- *   <li>Windows: http://ffmpeg.zeranoe.com/builds/</li>
- *   <li>MacOSX: http://www.ffmpegx.com/</li>
+ *   <li>GNU/Linux: ffmpeg or libav are deployed in most distributions.</li>
+ *   <li>Windows:
+ *   <ul>
+ *     <li>http://ffmpeg.zeranoe.com/builds/ (ffmpeg) <i>recommended, works w/ dshow</i></li>
+ *     <li>http://win32.libav.org/releases/  (libav)</li>
+ *   </ul></li>
+ *   <li>MacOSX: http://ffmpegmac.net/</li>
  *   <li>OpenIndiana/Solaris:<pre>
  *       pkg set-publisher -p http://pkg.openindiana.org/sfe-encumbered.
  *       pkt install pkg:/video/ffmpeg
  *       </pre></li>
- * </ul> 
+ * </ul>
+ * </p>
  */
-public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
-    public static final VersionNumber avUtilVersion;
-    public static final VersionNumber avFormatVersion;
-    public static final VersionNumber avCodecVersion;    
-    static final boolean available;
-    
+public class FFMPEGMediaPlayer extends GLMediaPlayerImpl {
+
+    /** POSIX ENOSYS {@value}: Function not implemented. FIXME: Move to GlueGen ?!*/
+    private static final int ENOSYS = 38;
+
+    // Instance data
+    private static final FFMPEGNatives natives;
+    private static final int avUtilMajorVersionCC;
+    private static final int avFormatMajorVersionCC;
+    private static final int avCodecMajorVersionCC;
+    private static final int avResampleMajorVersionCC;
+    private static final int swResampleMajorVersionCC;
+    private static final boolean available;
+
     static {
-        if(FFMPEGDynamicLibraryBundleInfo.initSingleton()) {
-            avUtilVersion = getAVVersion(getAvUtilVersion0());
-            avFormatVersion = getAVVersion(getAvFormatVersion0());
-            avCodecVersion = getAVVersion(getAvCodecVersion0());        
-            System.err.println("LIB_AV Util  : "+avUtilVersion);
-            System.err.println("LIB_AV Format: "+avFormatVersion);
-            System.err.println("LIB_AV Codec : "+avCodecVersion);
-            available = initIDs0();
+        final boolean libAVGood = FFMPEGDynamicLibraryBundleInfo.initSingleton();
+        final boolean libAVVersionGood;
+        if( FFMPEGDynamicLibraryBundleInfo.libsLoaded() ) {
+            natives = FFMPEGDynamicLibraryBundleInfo.getNatives();
+            if( null != natives ) {
+                avCodecMajorVersionCC = natives.getAvCodecMajorVersionCC0();
+                avFormatMajorVersionCC = natives.getAvFormatMajorVersionCC0();
+                avUtilMajorVersionCC = natives.getAvUtilMajorVersionCC0();
+                avResampleMajorVersionCC = natives.getAvResampleMajorVersionCC0();
+                swResampleMajorVersionCC = natives.getSwResampleMajorVersionCC0();
+            } else {
+                avUtilMajorVersionCC = 0;
+                avFormatMajorVersionCC = 0;
+                avCodecMajorVersionCC = 0;
+                avResampleMajorVersionCC = 0;
+                swResampleMajorVersionCC = 0;
+            }
+            final VersionNumber avCodecVersion = FFMPEGDynamicLibraryBundleInfo.avCodecVersion;
+            final VersionNumber avFormatVersion = FFMPEGDynamicLibraryBundleInfo.avFormatVersion;
+            final VersionNumber avUtilVersion = FFMPEGDynamicLibraryBundleInfo.avUtilVersion;
+            final VersionNumber avResampleVersion = FFMPEGDynamicLibraryBundleInfo.avResampleVersion;
+            final boolean avResampleLoaded = FFMPEGDynamicLibraryBundleInfo.avResampleLoaded();
+            final VersionNumber swResampleVersion = FFMPEGDynamicLibraryBundleInfo.swResampleVersion;
+            final boolean swResampleLoaded = FFMPEGDynamicLibraryBundleInfo.swResampleLoaded();
+            if( DEBUG ) {
+                System.err.println("LIB_AV Codec   : "+avCodecVersion+" [cc "+avCodecMajorVersionCC+"]");
+                System.err.println("LIB_AV Format  : "+avFormatVersion+" [cc "+avFormatMajorVersionCC+"]");
+                System.err.println("LIB_AV Util    : "+avUtilVersion+" [cc "+avUtilMajorVersionCC+"]");
+                System.err.println("LIB_AV Resample: "+avResampleVersion+" [cc "+avResampleMajorVersionCC+", loaded "+avResampleLoaded+"]");
+                System.err.println("LIB_SW Resample: "+swResampleVersion+" [cc "+swResampleMajorVersionCC+", loaded "+swResampleLoaded+"]");
+                System.err.println("LIB_AV Device  : [loaded "+FFMPEGDynamicLibraryBundleInfo.avDeviceLoaded()+"]");
+                System.err.println("LIB_AV Class   : "+(null!= natives ? natives.getClass().getSimpleName() : "n/a"));
+            }
+            libAVVersionGood = avCodecMajorVersionCC  == avCodecVersion.getMajor() &&
+                               avFormatMajorVersionCC == avFormatVersion.getMajor() &&
+                               avUtilMajorVersionCC   == avUtilVersion.getMajor() &&
+                               ( !avResampleLoaded || avResampleMajorVersionCC < 0 || avResampleMajorVersionCC  == avResampleVersion.getMajor() ) &&
+                               ( !swResampleLoaded || swResampleMajorVersionCC < 0 || swResampleMajorVersionCC  == swResampleVersion.getMajor() ) ;
+            if( !libAVVersionGood ) {
+                System.err.println("LIB_AV Not Matching Compile-Time / Runtime Major-Version");
+            }
         } else {
-            avUtilVersion = null;
-            avFormatVersion = null;
-            avCodecVersion = null;
-            available = false;
+            natives = null;
+            avUtilMajorVersionCC = 0;
+            avFormatMajorVersionCC = 0;
+            avCodecMajorVersionCC = 0;
+            avResampleMajorVersionCC = 0;
+            swResampleMajorVersionCC = 0;
+            libAVVersionGood = false;
         }
+        available = libAVGood && libAVVersionGood && null != natives;
     }
-    
+
     public static final boolean isAvailable() { return available; }
 
-    private static VersionNumber getAVVersion(int vers) {
-        return new VersionNumber( ( vers >> 16 ) & 0xFF,
-                                  ( vers >>  8 ) & 0xFF,
-                                  ( vers >>  0 ) & 0xFF );
-    }
-    
-    protected long moviePtr = 0;    
-    protected long procAddrGLTexSubImage2D = 0;
-    protected EGLMediaPlayerImpl.EGLTextureFrame lastTex = null;
-    protected GLPixelStorageModes psm;
-    protected PixelFormat vPixelFmt = null;
-    protected int vPlanes = 0;
-    protected int vBitsPerPixel = 0;
-    protected int vBytesPerPixelPerPlane = 0;    
-    protected int[] vLinesize = { 0, 0, 0 }; // per plane
-    protected int[] vTexWidth = { 0, 0, 0 }; // per plane
-    protected int texWidth, texHeight; // overall (stuffing planes in one texture)
-    protected ByteBuffer texCopy;
+    //
+    // General
+    //
+
+    private long moviePtr = 0;
+
+    //
+    // Video
+    //
+
+    private String texLookupFuncName = "ffmpegTexture2D";
+    private boolean usesTexLookupShader = false;
+    private PixelFormat vPixelFmt = null;
+    private int vPlanes = 0;
+    private int vBitsPerPixel = 0;
+    private int vBytesPerPixelPerPlane = 0;
+    private int texWidth, texHeight; // overall (stuffing planes in one texture)
+    private String singleTexComp = "r";
+    private final GLPixelStorageModes psm;
+
+    //
+    // Audio
+    //
+
+    private AudioSink.AudioFormat avChosenAudioFormat;
+    private int audioSamplesPerFrameAndChannel = 0;
 
     public FFMPEGMediaPlayer() {
-        super(TextureType.GL, false);
         if(!available) {
             throw new RuntimeException("FFMPEGMediaPlayer not available");
         }
-        setTextureCount(1);
-        moviePtr = createInstance0(true);
+        moviePtr = natives.createInstance0(this, DEBUG_NATIVE);
         if(0==moviePtr) {
             throw new GLException("Couldn't create FFMPEGInstance");
         }
         psm = new GLPixelStorageModes();
+        audioSink = null;
     }
-    
+
     @Override
-    protected TextureSequence.TextureFrame createTexImage(GL gl, int idx, int[] tex) {
-        if(TextureType.GL == texType) {
-            final Texture texture = super.createTexImageImpl(gl, idx, tex, texWidth, texHeight, true);
-            lastTex = new EGLTextureFrame(null, texture, 0, 0);
-        } else {
-            throw new InternalError("n/a");
+    protected final void destroyImpl(GL gl) {
+        if (moviePtr != 0) {
+            natives.destroyInstance0(moviePtr);
+            moviePtr = 0;
         }
-        return lastTex;
+        destroyAudioSink();
     }
-    
-    @Override
-    protected void destroyTexImage(GL gl, TextureSequence.TextureFrame imgTex) {
-        lastTex = null;
-        super.destroyTexImage(gl, imgTex);        
+    private final void destroyAudioSink() {
+        final AudioSink _audioSink = audioSink;
+        if( null != _audioSink ) {
+            audioSink = null;
+            _audioSink.destroy();
+        }
     }
-    
+
+    public static final String dev_video_linux = "/dev/video";
+
     @Override
-    protected void destroyImpl(GL gl) {
-        if (moviePtr != 0) {
-            destroyInstance0(moviePtr);
-            moviePtr = 0;
+    protected final void initStreamImpl(int vid, int aid) throws IOException {
+        if(0==moviePtr) {
+            throw new GLException("FFMPEG native instance null");
         }
+        if(DEBUG) {
+            System.err.println("initStream: p1 "+this);
+        }
+
+        final String streamLocS = IOUtil.decodeURIIfFilePath(streamLoc);
+        destroyAudioSink();
+        if( GLMediaPlayer.STREAM_ID_NONE == aid ) {
+            audioSink = AudioSinkFactory.createNull();
+        } else {
+            audioSink = AudioSinkFactory.createDefault();
+        }
+        final AudioFormat preferredAudioFormat = audioSink.getPreferredFormat();
+        if(DEBUG) {
+            System.err.println("initStream: p2 preferred "+preferredAudioFormat+", "+this);
+        }
+
+        final boolean isCameraInput = null != cameraPath;
+        final String resStreamLocS;
+        // int rw=640, rh=480, rr=15;
+        int rw=-1, rh=-1, rr=-1;
+        String sizes = null;
+        if( isCameraInput ) {
+            switch(Platform.OS_TYPE) {
+                case ANDROID:
+                    // ??
+                case FREEBSD:
+                case HPUX:
+                case LINUX:
+                case SUNOS:
+                    resStreamLocS = dev_video_linux + cameraPath;
+                    break;
+                case WINDOWS:
+                    resStreamLocS = cameraPath;
+                    break;
+                case MACOS:
+                case OPENKODE:
+                default:
+                    resStreamLocS = streamLocS; // FIXME: ??
+                    break;
+            }
+            if( null != cameraProps ) {
+                sizes = cameraProps.get(CameraPropSizeS);
+                int v = getPropIntVal(cameraProps, CameraPropWidth);
+                if( v > 0 ) { rw = v; }
+                v = getPropIntVal(cameraProps, CameraPropHeight);
+                if( v > 0 ) { rh = v; }
+                v = getPropIntVal(cameraProps, CameraPropRate);
+                if( v > 0 ) { rr = v; }
+            }
+        } else {
+            resStreamLocS = streamLocS;
+        }
+        final int aMaxChannelCount = audioSink.getMaxSupportedChannels();
+        final int aPrefSampleRate = preferredAudioFormat.sampleRate;
+         // setStream(..) issues updateAttributes*(..), and defines avChosenAudioFormat, vid, aid, .. etc
+        if(DEBUG) {
+            System.err.println("initStream: p3 cameraPath "+cameraPath+", isCameraInput "+isCameraInput);
+            System.err.println("initStream: p3 stream "+streamLoc+" -> "+streamLocS+" -> "+resStreamLocS);
+            System.err.println("initStream: p3 vid "+vid+", sizes "+sizes+", reqVideo "+rw+"x"+rh+"@"+rr+", aid "+aid+", aMaxChannelCount "+aMaxChannelCount+", aPrefSampleRate "+aPrefSampleRate);
+        }
+        natives.setStream0(moviePtr, resStreamLocS, isCameraInput, vid, sizes, rw, rh, rr, aid, aMaxChannelCount, aPrefSampleRate);
     }
-    
+
     @Override
-    protected void initGLStreamImpl(GL gl, int[] texNames) throws IOException {
+    protected final void initGLImpl(GL gl) throws IOException, GLException {
         if(0==moviePtr) {
             throw new GLException("FFMPEG native instance null");
         }
-        final String urlS=urlConn.getURL().toExternalForm();
-    
-        System.out.println("setURL: p1 "+this);
-        setStream0(moviePtr, urlS, -1, -1);
-        System.out.println("setURL: p2 "+this);
-        int tf;
-        switch(vBytesPerPixelPerPlane) {
-            case 1: tf = GL2ES2.GL_RED; break;
-            case 3: tf = GL2ES2.GL_RGB; break;
-            case 4: tf = GL2ES2.GL_RGBA; break;
-            default: throw new RuntimeException("Unsupported bytes-per-pixel / plane "+vBytesPerPixelPerPlane);
-        }        
-        setTextureFormat(tf);
-        setTextureType(GL.GL_UNSIGNED_BYTE);
-        GLContextImpl ctx = (GLContextImpl)gl.getContext();
-        ProcAddressTable pt = ctx.getGLProcAddressTable();
-        if(pt instanceof GLES2ProcAddressTable) {
-            procAddrGLTexSubImage2D = ((GLES2ProcAddressTable)pt)._addressof_glTexSubImage2D;
-        } else if(pt instanceof GLES1ProcAddressTable) {
-            procAddrGLTexSubImage2D = ((GLES1ProcAddressTable)pt)._addressof_glTexSubImage2D;
-        } else if(pt instanceof GL4bcProcAddressTable) {
-            procAddrGLTexSubImage2D = ((GL4bcProcAddressTable)pt)._addressof_glTexSubImage2D;
+        if(null == audioSink) {
+            throw new GLException("AudioSink null");
+        }
+        final int audioQueueLimit;
+        if( null != gl && STREAM_ID_NONE != vid ) {
+            final GLContextImpl ctx = (GLContextImpl)gl.getContext();
+            AccessController.doPrivileged(new PrivilegedAction<Object>() {
+                @Override
+                public Object run() {
+                    final ProcAddressTable pt = ctx.getGLProcAddressTable();
+                    final long procAddrGLTexSubImage2D = pt.getAddressFor("glTexSubImage2D");
+                    final long procAddrGLGetError = pt.getAddressFor("glGetError");
+                    final long procAddrGLFlush = pt.getAddressFor("glFlush");
+                    final long procAddrGLFinish = pt.getAddressFor("glFinish");
+                    natives.setGLFuncs0(moviePtr, procAddrGLTexSubImage2D, procAddrGLGetError, procAddrGLFlush, procAddrGLFinish);
+                    return null;
+            } } );
+            audioQueueLimit = AudioSink.DefaultQueueLimitWithVideo;
+        } else {
+            audioQueueLimit = AudioSink.DefaultQueueLimitAudioOnly;
+        }
+        if(DEBUG) {
+            System.err.println("initGL: p3 avChosen "+avChosenAudioFormat);
+        }
+
+        if( STREAM_ID_NONE == aid ) {
+            audioSink.destroy();
+            audioSink = AudioSinkFactory.createNull();
+            audioSink.init(AudioSink.DefaultFormat, 0, AudioSink.DefaultInitialQueueSize, AudioSink.DefaultQueueGrowAmount, audioQueueLimit);
         } else {
-            throw new InternalError("Unknown ProcAddressTable: "+pt.getClass().getName()+" of "+ctx.getClass().getName());
+            final float frameDuration;
+            if( audioSamplesPerFrameAndChannel > 0 ) {
+                frameDuration= avChosenAudioFormat.getSamplesDuration(audioSamplesPerFrameAndChannel);
+            } else {
+                frameDuration = AudioSink.DefaultFrameDuration;
+            }
+            final boolean audioSinkOK = audioSink.init(avChosenAudioFormat, frameDuration, AudioSink.DefaultInitialQueueSize, AudioSink.DefaultQueueGrowAmount, audioQueueLimit);
+            if( !audioSinkOK ) {
+                System.err.println("AudioSink "+audioSink.getClass().getName()+" does not support "+avChosenAudioFormat+", using Null");
+                audioSink.destroy();
+                audioSink = AudioSinkFactory.createNull();
+                audioSink.init(avChosenAudioFormat, 0, AudioSink.DefaultInitialQueueSize, AudioSink.DefaultQueueGrowAmount, audioQueueLimit);
+            }
+        }
+        if(DEBUG) {
+            System.err.println("initGL: p4 chosen "+avChosenAudioFormat);
+            System.err.println("initGL: p4 chosen "+audioSink);
+        }
+
+        if( null != gl && STREAM_ID_NONE != vid ) {
+            int tf, tif=GL.GL_RGBA; // texture format and internal format
+            int tt = GL.GL_UNSIGNED_BYTE;
+            switch(vBytesPerPixelPerPlane) {
+                case 1:
+                    if( gl.isGL3ES3() ) {
+                        // RED is supported on ES3 and >= GL3 [core]; ALPHA is deprecated on core
+                        tf = GL2ES2.GL_RED;   tif=GL2ES2.GL_RED; singleTexComp = "r";
+                    } else {
+                        // ALPHA is supported on ES2 and GL2, i.e. <= GL3 [core] or compatibility
+                        tf = GL2ES2.GL_ALPHA; tif=GL2ES2.GL_ALPHA; singleTexComp = "a";
+                    }
+                    break;
+
+                case 2: if( vPixelFmt == PixelFormat.YUYV422 ) {
+                            // YUYV422: // < packed YUV 4:2:2, 2x 16bpp, Y0 Cb Y1 Cr
+                            // Stuffed into RGBA half width texture
+                            tf = GL2ES2.GL_RGBA; tif=GL2ES2.GL_RGBA; break;
+                        } else {
+                            tf = GL2ES2.GL_RG;   tif=GL2ES2.GL_RG; break;
+                        }
+                case 3: tf = GL2ES2.GL_RGB;   tif=GL.GL_RGB;   break;
+                case 4: if( vPixelFmt == PixelFormat.BGRA ) {
+                            tf = GL2ES2.GL_BGRA;  tif=GL.GL_RGBA;  break;
+                        } else {
+                            tf = GL2ES2.GL_RGBA;  tif=GL.GL_RGBA;  break;
+                        }
+                default: throw new RuntimeException("Unsupported bytes-per-pixel / plane "+vBytesPerPixelPerPlane);
+            }
+            setTextureFormat(tif, tf);
+            setTextureType(tt);
+            if(DEBUG) {
+                System.err.println("initGL: p5: video "+vPixelFmt+", planes "+vPlanes+", bpp "+vBitsPerPixel+"/"+vBytesPerPixelPerPlane+
+                                   ", tex "+texWidth+"x"+texHeight+", usesTexLookupShader "+usesTexLookupShader);
+            }
         }
     }
-    private void updateAttributes2(int pixFmt, int planes, int bitsPerPixel, int bytesPerPixelPerPlane,
-                                   int lSz0, int lSz1, int lSz2,
-                                   int tWd0, int tWd1, int tWd2) {
-        vPixelFmt = PixelFormat.valueOf(pixFmt);
-        vPlanes = planes;
-        vBitsPerPixel = bitsPerPixel;
-        vBytesPerPixelPerPlane = bytesPerPixelPerPlane;
-        vLinesize[0] = lSz0; vLinesize[1] = lSz1; vLinesize[2] = lSz2;
-        vTexWidth[0] = tWd0; vTexWidth[1] = tWd1; vTexWidth[2] = tWd2;
-        
-        switch(vPixelFmt) {
-            case YUV420P:
-                // YUV420P: Adding U+V on right side of fixed height texture,
-                //          since width is already aligned by decoder.
-                // Y=w*h, Y=w/2*h/2, U=w/2*h/2
-                // w*h + 2 ( w/2 * h/2 ) 
-                // w*h + w*h/2
-                // 2*w/2 * h 
-                texWidth = vTexWidth[0] + vTexWidth[1]; texHeight = height; 
+    @Override
+    protected final TextureFrame createTexImage(GL gl, int texName) {
+        return new TextureFrame( createTexImageImpl(gl, texName, texWidth, texHeight) );
+    }
+
+    /**
+     * @param sampleRate sample rate in Hz (1/s)
+     * @param sampleSize sample size in bits
+     * @param channelCount number of channels
+     * @param signed true if signed number, false for unsigned
+     * @param fixedP true for fixed point value, false for unsigned floating point value with a sampleSize of 32 (float) or 64 (double)
+     * @param planar true for planar data package (each channel in own data buffer), false for packed data channels interleaved in one buffer.
+     * @param littleEndian true for little-endian, false for big endian
+     * @return
+     */
+
+    /**
+     * Native callback
+     * Converts the given libav/ffmpeg values to {@link AudioFormat} and returns {@link AudioSink#isSupported(AudioFormat)}.
+     * @param audioSampleFmt ffmpeg/libav audio-sample-format, see {@link SampleFormat}.
+     * @param audioSampleRate sample rate in Hz (1/s)
+     * @param audioChannels number of channels
+     */
+    final boolean isAudioFormatSupported(int audioSampleFmt, int audioSampleRate, int audioChannels) {
+        final SampleFormat avFmt = SampleFormat.valueOf(audioSampleFmt);
+        final AudioFormat audioFormat = avAudioFormat2Local(avFmt, audioSampleRate, audioChannels);
+        final boolean res = audioSink.isSupported(audioFormat);
+        if( DEBUG ) {
+            System.err.println("AudioSink.isSupported: "+res+": av[fmt "+avFmt+", rate "+audioSampleRate+", chan "+audioChannels+"] -> "+audioFormat);
+        }
+        return res;
+    }
+
+    /**
+     * Returns {@link AudioFormat} as converted from the given libav/ffmpeg values.
+     * @param audioSampleFmt ffmpeg/libav audio-sample-format, see {@link SampleFormat}.
+     * @param audioSampleRate sample rate in Hz (1/s)
+     * @param audioChannels number of channels
+     */
+    private final AudioFormat avAudioFormat2Local(SampleFormat audioSampleFmt, int audioSampleRate, int audioChannels) {
+        final int sampleSize;
+        boolean planar = true;
+        boolean fixedP = true;
+        final boolean signed;
+        switch( audioSampleFmt ) {
+            case S32:
+                planar = false;
+            case S32P:
+                sampleSize = 32;
+                signed = true;
+                break;
+            case S16:
+                planar = false;
+            case S16P:
+                sampleSize = 16;
+                signed = true;
+                break;
+            case U8:
+                planar = false;
+            case U8P:
+                sampleSize = 8;
+                signed = false;
+                break;
+            case DBL:
+                planar = false;
+            case DBLP:
+                sampleSize = 64;
+                signed = true;
+                fixedP = false;
                 break;
-            // case PIX_FMT_YUYV422:
-            case RGB24:
-            case BGR24:
-            case ARGB:
-            case RGBA:
-            case ABGR:
-            case BGRA:
-                texWidth = vTexWidth[0]; texHeight = height; 
+            case FLT:
+                planar = false;
+            case FLTP:
+                sampleSize = 32;
+                signed = true;
+                fixedP = false;
                 break;
-            default: // FIXME: Add more planar formats !
-                throw new RuntimeException("Unsupported pixelformat: "+vPixelFmt);
+            default: // FIXME: Add more formats !
+                throw new IllegalArgumentException("Unsupported sampleformat: "+audioSampleFmt);
+        }
+        return new AudioFormat(audioSampleRate, sampleSize, audioChannels, signed, fixedP, planar, true /* littleEndian */);
+    }
+
+    /**
+     * Native callback
+     * @param vid
+     * @param pixFmt
+     * @param planes
+     * @param bitsPerPixel
+     * @param bytesPerPixelPerPlane
+     * @param tWd0
+     * @param tWd1
+     * @param tWd2
+     * @param aid
+     * @param audioSampleFmt
+     * @param audioSampleRate
+     * @param audioChannels
+     * @param audioSamplesPerFrameAndChannel in audio samples per frame and channel
+     */
+    void setupFFAttributes(int vid, int pixFmt, int planes, int bitsPerPixel, int bytesPerPixelPerPlane,
+                          int tWd0, int tWd1, int tWd2, int vW, int vH,
+                          int aid, int audioSampleFmt, int audioSampleRate,
+                          int audioChannels, int audioSamplesPerFrameAndChannel) {
+        // defaults ..
+        vPixelFmt = null;
+        vPlanes = 0;
+        vBitsPerPixel = 0;
+        vBytesPerPixelPerPlane = 0;
+        usesTexLookupShader = false;
+        texWidth = 0; texHeight = 0;
+
+        final int[] vTexWidth = { 0, 0, 0 }; // per plane
+
+        if( STREAM_ID_NONE != vid ) {
+            vPixelFmt = PixelFormat.valueOf(pixFmt);
+            vPlanes = planes;
+            vBitsPerPixel = bitsPerPixel;
+            vBytesPerPixelPerPlane = bytesPerPixelPerPlane;
+            vTexWidth[0] = tWd0; vTexWidth[1] = tWd1; vTexWidth[2] = tWd2;
+
+            switch(vPixelFmt) {
+                case YUVJ420P:
+                case YUV420P: // < planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
+                    usesTexLookupShader = true;
+                    // YUV420P: Adding U+V on right side of fixed height texture,
+                    //          since width is already aligned by decoder.
+                    //          Splitting texture to 4 quadrants:
+                    //            Y covers left top/low quadrant
+                    //            U on top-right quadrant.
+                    //            V on low-right quadrant.
+                    // Y=w*h, U=w/2*h/2, V=w/2*h/2
+                    //   w*h + 2 ( w/2 * h/2 )
+                    //   w*h + w*h/2
+                    texWidth = vTexWidth[0] + vTexWidth[1]; texHeight = vH;
+                    break;
+                case YUVJ422P:
+                case YUV422P:
+                    usesTexLookupShader = true;
+                    // YUV422P: Adding U+V on right side of fixed height texture,
+                    //          since width is already aligned by decoder.
+                    //          Splitting texture to 4 columns
+                    //            Y covers columns 1+2
+                    //            U covers columns 3
+                    //            V covers columns 4
+                    texWidth = vTexWidth[0] + vTexWidth[1] + vTexWidth[2]; texHeight = vH;
+                    break;
+                case YUYV422: // < packed YUV 4:2:2, 2x 16bpp, Y0 Cb Y1 Cr - stuffed into RGBA half width texture
+                case BGR24:
+                    usesTexLookupShader = true;
+                    texWidth = vTexWidth[0]; texHeight = vH;
+                    break;
+
+                case RGB24:
+                case ARGB:
+                case RGBA:
+                case ABGR:
+                case BGRA:
+                    usesTexLookupShader = false;
+                    texWidth = vTexWidth[0]; texHeight = vH;
+                    break;
+                default: // FIXME: Add more formats !
+                    throw new RuntimeException("Unsupported pixelformat: "+vPixelFmt);
+            }
         }
+
+        // defaults ..
+        final SampleFormat aSampleFmt;
+        avChosenAudioFormat = null;;
+        this.audioSamplesPerFrameAndChannel = 0;
+
+        if( STREAM_ID_NONE != aid ) {
+            aSampleFmt = SampleFormat.valueOf(audioSampleFmt);
+            avChosenAudioFormat = avAudioFormat2Local(aSampleFmt, audioSampleRate, audioChannels);
+            this.audioSamplesPerFrameAndChannel = audioSamplesPerFrameAndChannel;
+        } else {
+            aSampleFmt = null;
+        }
+
         if(DEBUG) {
-            System.err.println("XXX0: fmt "+vPixelFmt+", planes "+vPlanes+", bpp "+vBitsPerPixel+"/"+vBytesPerPixelPerPlane);
+            System.err.println("audio: id "+aid+", fmt "+aSampleFmt+", "+avChosenAudioFormat+", aFrameSize/fc "+audioSamplesPerFrameAndChannel);
+            System.err.println("video: id "+vid+", fmt "+vW+"x"+vH+", "+vPixelFmt+", planes "+vPlanes+", bpp "+vBitsPerPixel+"/"+vBytesPerPixelPerPlane+", usesTexLookupShader "+usesTexLookupShader);
             for(int i=0; i<3; i++) {
-                System.err.println("XXX0 "+i+": "+vTexWidth[i]+"/"+vLinesize[i]);
+                System.err.println("video: p["+i+"]: "+vTexWidth[i]);
             }
-            System.err.println("XXX0 total tex "+texWidth+"x"+texHeight);
+            System.err.println("video: total tex "+texWidth+"x"+texHeight);
+            System.err.println(this.toString());
         }
     }
-    
+
+    /**
+     * Native callback
+     * @param isInGLOrientation
+     * @param pixFmt
+     * @param planes
+     * @param bitsPerPixel
+     * @param bytesPerPixelPerPlane
+     * @param tWd0
+     * @param tWd1
+     * @param tWd2
+     */
+    void updateVidAttributes(boolean isInGLOrientation, int pixFmt, int planes, int bitsPerPixel, int bytesPerPixelPerPlane,
+                             int tWd0, int tWd1, int tWd2, int vW, int vH) {
+    }
+
     /**
      * {@inheritDoc}
-     * 
+     *
      * If this implementation generates a specialized shader,
      * it allows the user to override the default function name <code>ffmpegTexture2D</code>.
      * Otherwise the call is delegated to it's super class.
      */
     @Override
-    public String getTextureLookupFunctionName(String desiredFuncName) throws IllegalStateException {
+    public final String getTextureLookupFunctionName(String desiredFuncName) throws IllegalStateException {
         if(State.Uninitialized == state) {
             throw new IllegalStateException("Instance not initialized: "+this);
         }
-        if(PixelFormat.YUV420P == vPixelFmt) {
+        if( usesTexLookupShader ) {
             if(null != desiredFuncName && desiredFuncName.length()>0) {
-                textureLookupFunctionName = desiredFuncName;
+                texLookupFuncName = desiredFuncName;
             }
-            return textureLookupFunctionName;
+            return texLookupFuncName;
         }
-        return super.getTextureLookupFunctionName(desiredFuncName);        
+        return super.getTextureLookupFunctionName(desiredFuncName);
     }
-    private String textureLookupFunctionName = "ffmpegTexture2D";
-    
+
     /**
      * {@inheritDoc}
-     * 
+     *
      * Depending on the pixelformat, a specific conversion shader is being created,
-     * e.g. YUV420P to RGB. Otherwise the call is delegated to it's super class.  
-     */ 
+     * e.g. YUV420P to RGB. Otherwise the call is delegated to it's super class.
+     */
     @Override
-    public String getTextureLookupFragmentShaderImpl() throws IllegalStateException {
+    public final String getTextureLookupFragmentShaderImpl() throws IllegalStateException {
       if(State.Uninitialized == state) {
           throw new IllegalStateException("Instance not initialized: "+this);
       }
+      if( !usesTexLookupShader ) {
+          return super.getTextureLookupFragmentShaderImpl();
+      }
       final float tc_w_1 = (float)getWidth() / (float)texWidth;
       switch(vPixelFmt) {
-        case YUV420P:
-          return 
-              "vec4 "+textureLookupFunctionName+"(in "+getTextureSampler2DType()+" image, in vec2 texCoord) {\n"+
+        case YUVJ420P:
+        case YUV420P: // < planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
+          return
+              "vec4 "+texLookupFuncName+"(in "+getTextureSampler2DType()+" image, in vec2 texCoord) {\n"+
               "  vec2 u_off = vec2("+tc_w_1+", 0.0);\n"+
               "  vec2 v_off = vec2("+tc_w_1+", 0.5);\n"+
               "  vec2 tc_half = texCoord*0.5;\n"+
               "  float y,u,v,r,g,b;\n"+
-              "  y = texture2D(image, texCoord).r;\n"+
-              "  u = texture2D(image, u_off+tc_half).r;\n"+
-              "  v = texture2D(image, v_off+tc_half).r;\n"+              
+              "  y = texture2D(image, texCoord)."+singleTexComp+";\n"+
+              "  u = texture2D(image, u_off+tc_half)."+singleTexComp+";\n"+
+              "  v = texture2D(image, v_off+tc_half)."+singleTexComp+";\n"+
               "  y = 1.1643*(y-0.0625);\n"+
               "  u = u-0.5;\n"+
               "  v = v-0.5;\n"+
               "  r = y+1.5958*v;\n"+
               "  g = y-0.39173*u-0.81290*v;\n"+
-              "  b = y+2.017*u;\n"+              
+              "  b = y+2.017*u;\n"+
               "  return vec4(r, g, b, 1);\n"+
               "}\n"
-          ;            
-        default: // FIXME: Add more planar formats !
-          return super.getTextureLookupFragmentShaderImpl();
-      }        
-    }
-    
-    @Override
-    protected synchronized int getCurrentPositionImpl() {
-        return 0!=moviePtr ? getVideoPTS0(moviePtr) : 0;
-    }
+          ;
 
-    @Override
-    protected synchronized boolean setPlaySpeedImpl(float rate) {
-        return true;
+        case YUVJ422P:
+        case YUV422P: ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
+          return
+              "vec4 "+texLookupFuncName+"(in "+getTextureSampler2DType()+" image, in vec2 texCoord) {\n"+
+              "  vec2 u_off = vec2("+tc_w_1+"      , 0.0);\n"+
+              "  vec2 v_off = vec2("+tc_w_1+" * 1.5, 0.0);\n"+
+              "  vec2 tc_halfw = vec2(texCoord.x*0.5, texCoord.y);\n"+
+              "  float y,u,v,r,g,b;\n"+
+              "  y = texture2D(image, texCoord)."+singleTexComp+";\n"+
+              "  u = texture2D(image, u_off+tc_halfw)."+singleTexComp+";\n"+
+              "  v = texture2D(image, v_off+tc_halfw)."+singleTexComp+";\n"+
+              "  y = 1.1643*(y-0.0625);\n"+
+              "  u = u-0.5;\n"+
+              "  v = v-0.5;\n"+
+              "  r = y+1.5958*v;\n"+
+              "  g = y-0.39173*u-0.81290*v;\n"+
+              "  b = y+2.017*u;\n"+
+              "  return vec4(r, g, b, 1);\n"+
+              "}\n"
+          ;
+
+        case YUYV422: // < packed YUV 4:2:2, 2 x 16bpp, [Y0 Cb] [Y1 Cr]
+                      // Stuffed into RGBA half width texture
+          return
+              "vec4 "+texLookupFuncName+"(in "+getTextureSampler2DType()+" image, in vec2 texCoord) {\n"+
+              "  "+
+              "  float y1,u,y2,v,y,r,g,b;\n"+
+              "  vec2 tc_halfw = vec2(texCoord.x*0.5, texCoord.y);\n"+
+              "  vec4 yuyv = texture2D(image, tc_halfw).rgba;\n"+
+              "  y1 = yuyv.r;\n"+
+              "  u  = yuyv.g;\n"+
+              "  y2 = yuyv.b;\n"+
+              "  v  = yuyv.a;\n"+
+              "  y = mix( y1, y2, mod(gl_FragCoord.x, 2) ); /* avoid branching! */\n"+
+              "  y = 1.1643*(y-0.0625);\n"+
+              "  u = u-0.5;\n"+
+              "  v = v-0.5;\n"+
+              "  r = y+1.5958*v;\n"+
+              "  g = y-0.39173*u-0.81290*v;\n"+
+              "  b = y+2.017*u;\n"+
+              "  return vec4(r, g, b, 1);\n"+
+              "}\n"
+          ;
+        case BGR24:
+          return
+              "vec4 "+texLookupFuncName+"(in "+getTextureSampler2DType()+" image, in vec2 texCoord) {\n"+
+              "  "+
+              "  vec3 bgr = texture2D(image, texCoord).rgb;\n"+
+              "  return vec4(bgr.b, bgr.g, bgr.r, 1);\n"+ /* just swizzle */
+              "}\n"
+          ;
+
+        default: // FIXME: Add more formats !
+          throw new InternalError("Add proper mapping of: vPixelFmt "+vPixelFmt+", usesTexLookupShader "+usesTexLookupShader);
+      }
     }
 
     @Override
-    public synchronized boolean startImpl() {
+    public final boolean playImpl() {
         if(0==moviePtr) {
             return false;
         }
+        final int errno = natives.play0(moviePtr);
+        if( DEBUG_NATIVE && errno != 0 && errno != -ENOSYS) {
+            System.err.println("libav play err: "+errno);
+        }
         return true;
     }
 
-    /** @return time position after issuing the command */
     @Override
-    public synchronized boolean pauseImpl() {
+    public final boolean pauseImpl() {
         if(0==moviePtr) {
             return false;
         }
+        final int errno = natives.pause0(moviePtr);
+        if( DEBUG_NATIVE && errno != 0 && errno != -ENOSYS) {
+            System.err.println("libav pause err: "+errno);
+        }
         return true;
     }
 
-    /** @return time position after issuing the command */
     @Override
-    public synchronized boolean stopImpl() {
+    protected final synchronized int seekImpl(int msec) {
         if(0==moviePtr) {
-            return false;
+            throw new GLException("FFMPEG native instance null");
         }
-        return true;
+        return natives.seek0(moviePtr, msec);
     }
 
-    /** @return time position after issuing the command */
     @Override
-    protected synchronized int seekImpl(int msec) {
-        if(0==moviePtr) {
-            throw new GLException("FFMPEG native instance null");
-        }
-        int pts0 = getVideoPTS0(moviePtr);
-        int pts1 = seek0(moviePtr, msec);
-        System.err.println("Seek: "+pts0+" -> "+msec+" : "+pts1);
-        return pts1;
+    protected void preNextTextureImpl(GL gl) {
+        psm.setUnpackAlignment(gl, 1); // RGBA ? 4 : 1
+        gl.glActiveTexture(GL.GL_TEXTURE0+getTextureUnit());
     }
 
     @Override
-    protected TextureSequence.TextureFrame getLastTextureImpl() {
-        return lastTex;
+    protected void postNextTextureImpl(GL gl) {
+        psm.restore(gl);
     }
-    
-    private long lastVideoTime = 0;
-    private int lastVideoPTS = 0;
-    private static final int dt_d = 9;
-    
+
     @Override
-    protected TextureSequence.TextureFrame getNextTextureImpl(GL gl, boolean blocking) {
+    protected final int getNextTextureImpl(GL gl, TextureFrame nextFrame) {
         if(0==moviePtr) {
             throw new GLException("FFMPEG native instance null");
-        }                
-        if(null != lastTex) {
-            psm.setUnpackAlignment(gl, 1); // RGBA ? 4 : 1
-            try {
-                final Texture tex = lastTex.getTexture();
-                gl.glActiveTexture(GL.GL_TEXTURE0+getTextureUnit());
-                tex.enable(gl);
-                tex.bind(gl);
-                readNextPacket0(moviePtr, procAddrGLTexSubImage2D, textureTarget, textureFormat, textureType);
-            } finally {
-                psm.restore(gl);
-            }
-            final int pts = getVideoPTS0(moviePtr); // this frame
-            if(blocking) {
-                // poor mans video sync .. TODO: off thread 'readNextPackage0(..)' on shared GLContext and multi textures/unit!
-                final long now = System.currentTimeMillis();
-                final long now_d = now - lastVideoTime;
-                final long pts_d = pts - lastVideoPTS;                
-                final long dt = (long) ( (float) ( pts_d - now_d ) / getPlaySpeed() ) ;
-                lastVideoTime = now;
-                // System.err.println("s: pts-v "+pts+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt);
-                if(dt>dt_d) {
-                    try {
-                        Thread.sleep(dt-dt_d);
-                    } catch (InterruptedException e) { }
-                } /* else if(0>pts_d) {
-                    System.err.println("s: pts-v "+pts+", pts-d "+pts_d+", now_d "+now_d+", dt "+dt);
-                } */
-            }
-            lastVideoPTS = pts;
         }
-        return lastTex;
-    }
-    
-    private void consumeAudio(int len) {
-        
+        int vPTS = TimeFrameI.INVALID_PTS;
+        if( null != gl ) {
+            final Texture tex = nextFrame.getTexture();
+            tex.enable(gl);
+            tex.bind(gl);
+        }
+
+        /** Try decode up to 10 packets to find one containing video. */
+        for(int i=0; TimeFrameI.INVALID_PTS == vPTS && 10 > i; i++) {
+           vPTS = natives.readNextPacket0(moviePtr, textureTarget, textureFormat, textureType);
+        }
+        if( null != nextFrame ) {
+            nextFrame.setPTS(vPTS);
+        }
+        return vPTS;
     }
-    
-    private static native int getAvUtilVersion0();
-    private static native int getAvFormatVersion0();
-    private static native int getAvCodecVersion0();
-    private static native boolean initIDs0();
-    private native long createInstance0(boolean verbose);    
-    private native void destroyInstance0(long moviePtr);
-    
-    private native void setStream0(long moviePtr, String url, int vid, int aid);
-
-    private native int getVideoPTS0(long moviePtr);    
-    
-    private native int getAudioPTS0(long moviePtr);
-    private native Buffer getAudioBuffer0(long moviePtr, int plane);
-    
-    private native int readNextPacket0(long moviePtr, long procAddrGLTexSubImage2D, int texTarget, int texFmt, int texType);
-    
-    private native int seek0(long moviePtr, int position);
-
-    public static enum PixelFormat {
-        // NONE= -1,
-        YUV420P,   ///< planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
-        YUYV422,   ///< packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
-        RGB24,     ///< packed RGB 8:8:8, 24bpp, RGBRGB...
-        BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
-        YUV422P,   ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
-        YUV444P,   ///< planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples)
-        YUV410P,   ///< planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y samples)
-        YUV411P,   ///< planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples)
-        GRAY8,     ///<        Y        ,  8bpp
-        MONOWHITE, ///<        Y        ,  1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb
-        MONOBLACK, ///<        Y        ,  1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb
-        PAL8,      ///< 8 bit with RGB32 palette
-        YUVJ420P,  ///< planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of YUV420P and setting color_range
-        YUVJ422P,  ///< planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of YUV422P and setting color_range
-        YUVJ444P,  ///< planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of YUV444P and setting color_range
-        XVMC_MPEG2_MC,///< XVideo Motion Acceleration via common packet passing
-        XVMC_MPEG2_IDCT,
-        UYVY422,   ///< packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1
-        UYYVYY411, ///< packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3
-        BGR8,      ///< packed RGB 3:3:2,  8bpp, (msb)2B 3G 3R(lsb)
-        BGR4,      ///< packed RGB 1:2:1 bitstream,  4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
-        BGR4_BYTE, ///< packed RGB 1:2:1,  8bpp, (msb)1B 2G 1R(lsb)
-        RGB8,      ///< packed RGB 3:3:2,  8bpp, (msb)2R 3G 3B(lsb)
-        RGB4,      ///< packed RGB 1:2:1 bitstream,  4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits
-        RGB4_BYTE, ///< packed RGB 1:2:1,  8bpp, (msb)1R 2G 1B(lsb)
-        NV12,      ///< planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (first byte U and the following byte V)
-        NV21,      ///< as above, but U and V bytes are swapped
-
-        ARGB,      ///< packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
-        RGBA,      ///< packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
-        ABGR,      ///< packed ABGR 8:8:8:8, 32bpp, ABGRABGR...
-        BGRA,      ///< packed BGRA 8:8:8:8, 32bpp, BGRABGRA...
-
-        GRAY16BE,  ///<        Y        , 16bpp, big-endian
-        GRAY16LE,  ///<        Y        , 16bpp, little-endian
-        YUV440P,   ///< planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples)
-        YUVJ440P,  ///< planar YUV 4:4:0 full scale (JPEG), deprecated in favor of YUV440P and setting color_range
-        YUVA420P,  ///< planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples)
-        VDPAU_H264,///< H.264 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-        VDPAU_MPEG1,///< MPEG-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-        VDPAU_MPEG2,///< MPEG-2 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-        VDPAU_WMV3,///< WMV3 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-        VDPAU_VC1, ///< VC-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-        RGB48BE,   ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big-endian
-        RGB48LE,   ///< packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as little-endian
-
-        RGB565BE,  ///< packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), big-endian
-        RGB565LE,  ///< packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), little-endian
-        RGB555BE,  ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), big-endian, most significant bit to 0
-        RGB555LE,  ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), little-endian, most significant bit to 0
-
-        BGR565BE,  ///< packed BGR 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb), big-endian
-        BGR565LE,  ///< packed BGR 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb), little-endian
-        BGR555BE,  ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), big-endian, most significant bit to 1
-        BGR555LE,  ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), little-endian, most significant bit to 1
-
-        VAAPI_MOCO, ///< HW acceleration through VA API at motion compensation entry-point, Picture.data[3] contains a vaapi_render_state struct which contains macroblocks as well as various fields extracted from headers
-        VAAPI_IDCT, ///< HW acceleration through VA API at IDCT entry-point, Picture.data[3] contains a vaapi_render_state struct which contains fields extracted from headers
-        VAAPI_VLD,  ///< HW decoding through VA API, Picture.data[3] contains a vaapi_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-
-        YUV420P16LE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
-        YUV420P16BE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
-        YUV422P16LE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
-        YUV422P16BE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
-        YUV444P16LE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
-        YUV444P16BE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
-        VDPAU_MPEG4,  ///< MPEG4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
-        DXVA2_VLD,    ///< HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer
-
-        RGB444LE,  ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), little-endian, most significant bits to 0
-        RGB444BE,  ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), big-endian, most significant bits to 0
-        BGR444LE,  ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), little-endian, most significant bits to 1
-        BGR444BE,  ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), big-endian, most significant bits to 1
-        Y400A,     ///< 8bit gray, 8bit alpha
-        BGR48BE,   ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big-endian
-        BGR48LE,   ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as little-endian
-        YUV420P9BE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
-        YUV420P9LE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
-        YUV420P10BE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
-        YUV420P10LE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
-        YUV422P10BE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
-        YUV422P10LE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
-        YUV444P9BE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
-        YUV444P9LE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
-        YUV444P10BE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
-        YUV444P10LE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
-        YUV422P9BE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
-        YUV422P9LE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
-        VDA_VLD,    ///< hardware decoding through VDA
-        GBRP,      ///< planar GBR 4:4:4 24bpp
-        GBRP9BE,   ///< planar GBR 4:4:4 27bpp, big endian
-        GBRP9LE,   ///< planar GBR 4:4:4 27bpp, little endian
-        GBRP10BE,  ///< planar GBR 4:4:4 30bpp, big endian
-        GBRP10LE,  ///< planar GBR 4:4:4 30bpp, little endian
-        GBRP16BE,  ///< planar GBR 4:4:4 48bpp, big endian
-        GBRP16LE,  ///< planar GBR 4:4:4 48bpp, little endian
-        COUNT      ///< number of pixel formats in this list
-        ;
-        public static PixelFormat valueOf(int i) {
-            for (PixelFormat fmt : PixelFormat.values()) {
-                if(fmt.ordinal() == i) {
-                    return fmt;
-                }
-            }
-            return null;            
+
+    final void pushSound(ByteBuffer sampleData, int data_size, int audio_pts) {
+        setFirstAudioPTS2SCR( audio_pts );
+        if( 1.0f == playSpeed || audioSinkPlaySpeedSet ) {
+            audioSink.enqueueData( audio_pts, sampleData, data_size);
         }
     }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGNatives.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGNatives.java
new file mode 100644
index 000000000..b4b887bc9
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGNatives.java
@@ -0,0 +1,281 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.util.av.impl;
+
+import com.jogamp.opengl.util.texture.TextureSequence.TextureFrame;
+
+/* pp */ abstract class FFMPEGNatives {
+
+    private static final Object mutex_avcodec_openclose_jni = new Object();
+
+    final boolean initSymbols0(long[] symbols, int count) {
+        return initSymbols0(mutex_avcodec_openclose_jni, symbols, count);
+    }
+    abstract boolean initSymbols0(Object mutex_avcodec_openclose, long[] symbols, int count);
+    abstract int getAvUtilMajorVersionCC0();
+    abstract int getAvFormatMajorVersionCC0();
+    abstract int getAvCodecMajorVersionCC0();
+    abstract int getAvResampleMajorVersionCC0();
+    abstract int getSwResampleMajorVersionCC0();
+
+    abstract long createInstance0(FFMPEGMediaPlayer upstream, boolean verbose);
+    abstract void destroyInstance0(long moviePtr);
+
+    /**
+     * Issues {@link #updateAttributes(int, int, int, int, int, int, int, float, int, int, String, String)}
+     * and {@link #updateAttributes2(int, int, int, int, int, int, int, int, int, int)}.
+     *
+     * @param moviePtr
+     * @param url
+     * @param vid
+     * @param sizes requested video size as string, i.e. 'hd720'. May be null to favor vWidth and vHeight.
+     * @param vWidth requested video width (for camera mode)
+     * @param vHeight requested video width (for camera mode)
+     * @param vRate requested video framerate (for camera mode)
+     * @param aid
+     * @param aPrefSampleRate
+     * @param aPrefChannelCount
+     */
+    abstract void setStream0(long moviePtr, String url, boolean isCameraInput,
+                             int vid, String sizes, int vWidth, int vHeight,
+                             int vRate, int aid, int aMaxChannelCount, int aPrefSampleRate);
+
+    abstract void setGLFuncs0(long moviePtr, long procAddrGLTexSubImage2D, long procAddrGLGetError, long procAddrGLFlush, long procAddrGLFinish);
+
+    abstract int getVideoPTS0(long moviePtr);
+
+    abstract int getAudioPTS0(long moviePtr);
+
+    /**
+     * @return resulting current video PTS, or {@link TextureFrame#INVALID_PTS}
+     */
+    abstract int readNextPacket0(long moviePtr, int texTarget, int texFmt, int texType);
+
+    abstract int play0(long moviePtr);
+    abstract int pause0(long moviePtr);
+    abstract int seek0(long moviePtr, int position);
+
+    /** FFMPEG/libAV Audio Sample Format */
+    public static enum SampleFormat {
+        // NONE = -1,
+        U8,          ///< unsigned 8 bits
+        S16,         ///< signed 16 bits
+        S32,         ///< signed 32 bits
+        FLT,         ///< float
+        DBL,         ///< double
+
+        U8P,         ///< unsigned 8 bits, planar
+        S16P,        ///< signed 16 bits, planar
+        S32P,        ///< signed 32 bits, planar
+        FLTP,        ///< float, planar
+        DBLP,        ///< double, planar
+
+        COUNT;       ///< Number of sample formats.
+
+        /**
+         * Returns the matching SampleFormat value corresponding to the given SampleFormat's integer ordinal.
+         * <pre>
+         *   given:
+         *     ordinal = enumValue.ordinal()
+         *   reverse:
+         *     enumValue = EnumClass.values()[ordinal]
+         * </pre>
+         * @throws IllegalArgumentException if the given ordinal is out of range, i.e. not within [ 0 .. SampleFormat.values().length-1 ]
+         */
+        public static SampleFormat valueOf(int ordinal) throws IllegalArgumentException {
+            final SampleFormat[] all = SampleFormat.values();
+            if( 0 <= ordinal && ordinal < all.length ) {
+                return all[ordinal];
+            }
+            throw new IllegalArgumentException("Ordinal "+ordinal+" out of range of SampleFormat.values()[0.."+(all.length-1)+"]");
+        }
+    };
+
+    /** FFMPEG/libAV Pixel Format */
+    public static enum PixelFormat {
+        // NONE= -1,
+        /** planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples) */
+        YUV420P,
+        /** packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr ( sharing Cb and Cr w/ 2 pixels )*/
+        YUYV422,
+        /** packed RGB 8:8:8, 24bpp, RGBRGB... */
+        RGB24,
+        /** packed RGB 8:8:8, 24bpp, BGRBGR... */
+        BGR24,
+        /** planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples) */
+        YUV422P,
+        /** planar YUV 4:4:4, 24bpp, (1 Cr & Cb sample per 1x1 Y samples) */
+        YUV444P,
+        /** planar YUV 4:1:0,  9bpp, (1 Cr & Cb sample per 4x4 Y samples) */
+        YUV410P,
+        /** planar YUV 4:1:1, 12bpp, (1 Cr & Cb sample per 4x1 Y samples) */
+        YUV411P,
+        /** Y, 8bpp */
+        GRAY8,
+        /** Y,  1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb */
+        MONOWHITE,
+        /** Y,  1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb */
+        MONOBLACK,
+        /** 8 bit with RGB32 palette */
+        PAL8,
+        /** planar YUV 4:2:0, 12bpp, full scale (JPEG), deprecated in favor of YUV420P and setting color_range */
+        YUVJ420P,
+        /** planar YUV 4:2:2, 16bpp, full scale (JPEG), deprecated in favor of YUV422P and setting color_range */
+        YUVJ422P,
+        /** planar YUV 4:4:4, 24bpp, full scale (JPEG), deprecated in favor of YUV444P and setting color_range */
+        YUVJ444P,
+        /** XVideo Motion Acceleration via common packet passing */
+        XVMC_MPEG2_MC,
+        /** */
+        XVMC_MPEG2_IDCT,
+        /** packed YUV 4:2:2, 16bpp, Cb Y0 Cr Y1 */
+        UYVY422,
+        /** packed YUV 4:1:1, 12bpp, Cb Y0 Y1 Cr Y2 Y3 */
+        UYYVYY411,
+        /** packed RGB 3:3:2,  8bpp, (msb)2B 3G 3R(lsb) */
+        BGR8,
+        /** packed RGB 1:2:1 bitstream,  4bpp, (msb)1B 2G 1R(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits */
+        BGR4,
+        /** packed RGB 1:2:1,  8bpp, (msb)1B 2G 1R(lsb) */
+        BGR4_BYTE,
+        /** packed RGB 3:3:2,  8bpp, (msb)2R 3G 3B(lsb) */
+        RGB8,
+        /** packed RGB 1:2:1 bitstream,  4bpp, (msb)1R 2G 1B(lsb), a byte contains two pixels, the first pixel in the byte is the one composed by the 4 msb bits */
+        RGB4,
+        /** packed RGB 1:2:1,  8bpp, (msb)1R 2G 1B(lsb) */
+        RGB4_BYTE,
+        /** planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (first byte U and the following byte V) */
+        NV12,
+        /** as above, but U and V bytes are swapped */
+        NV21,
+
+        /** packed ARGB 8:8:8:8, 32bpp, ARGBARGB... */
+        ARGB,
+        /** packed RGBA 8:8:8:8, 32bpp, RGBARGBA... */
+        RGBA,
+        /** packed ABGR 8:8:8:8, 32bpp, ABGRABGR... */
+        ABGR,
+        /** packed BGRA 8:8:8:8, 32bpp, BGRABGRA... */
+        BGRA,
+
+        /** Y, 16bpp, big-endian */
+        GRAY16BE,
+        /** Y        , 16bpp, little-endian */
+        GRAY16LE,
+        /** planar YUV 4:4:0 (1 Cr & Cb sample per 1x2 Y samples) */
+        YUV440P,
+        /** planar YUV 4:4:0 full scale (JPEG), deprecated in favor of YUV440P and setting color_range */
+        YUVJ440P,
+        /** planar YUV 4:2:0, 20bpp, (1 Cr & Cb sample per 2x2 Y & A samples) */
+        YUVA420P,
+        /** H.264 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers */
+        VDPAU_H264,
+        /** MPEG-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers */
+        VDPAU_MPEG1,
+        /** MPEG-2 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers */
+        VDPAU_MPEG2,
+        /** WMV3 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers */
+        VDPAU_WMV3,
+        /** VC-1 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers */
+        VDPAU_VC1,
+        /** packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as big-endian */
+        RGB48BE,
+        /** packed RGB 16:16:16, 48bpp, 16R, 16G, 16B, the 2-byte value for each R/G/B component is stored as little-endian */
+        RGB48LE,
+
+        RGB565BE,  ///< packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), big-endian
+        RGB565LE,  ///< packed RGB 5:6:5, 16bpp, (msb)   5R 6G 5B(lsb), little-endian
+        RGB555BE,  ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), big-endian, most significant bit to 0
+        RGB555LE,  ///< packed RGB 5:5:5, 16bpp, (msb)1A 5R 5G 5B(lsb), little-endian, most significant bit to 0
+
+        BGR565BE,  ///< packed BGR 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb), big-endian
+        BGR565LE,  ///< packed BGR 5:6:5, 16bpp, (msb)   5B 6G 5R(lsb), little-endian
+        BGR555BE,  ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), big-endian, most significant bit to 1
+        BGR555LE,  ///< packed BGR 5:5:5, 16bpp, (msb)1A 5B 5G 5R(lsb), little-endian, most significant bit to 1
+
+        VAAPI_MOCO, ///< HW acceleration through VA API at motion compensation entry-point, Picture.data[3] contains a vaapi_render_state struct which contains macroblocks as well as various fields extracted from headers
+        VAAPI_IDCT, ///< HW acceleration through VA API at IDCT entry-point, Picture.data[3] contains a vaapi_render_state struct which contains fields extracted from headers
+        VAAPI_VLD,  ///< HW decoding through VA API, Picture.data[3] contains a vaapi_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+
+        YUV420P16LE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
+        YUV420P16BE,  ///< planar YUV 4:2:0, 24bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
+        YUV422P16LE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
+        YUV422P16BE,  ///< planar YUV 4:2:2, 32bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
+        YUV444P16LE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
+        YUV444P16BE,  ///< planar YUV 4:4:4, 48bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
+        VDPAU_MPEG4,  ///< MPEG4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstream of the slices as well as various fields extracted from headers
+        DXVA2_VLD,    ///< HW decoding through DXVA2, Picture.data[3] contains a LPDIRECT3DSURFACE9 pointer
+
+        RGB444LE,  ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), little-endian, most significant bits to 0
+        RGB444BE,  ///< packed RGB 4:4:4, 16bpp, (msb)4A 4R 4G 4B(lsb), big-endian, most significant bits to 0
+        BGR444LE,  ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), little-endian, most significant bits to 1
+        BGR444BE,  ///< packed BGR 4:4:4, 16bpp, (msb)4A 4B 4G 4R(lsb), big-endian, most significant bits to 1
+        Y400A,     ///< 8bit gray, 8bit alpha
+        BGR48BE,   ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as big-endian
+        BGR48LE,   ///< packed RGB 16:16:16, 48bpp, 16B, 16G, 16R, the 2-byte value for each R/G/B component is stored as little-endian
+        YUV420P9BE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
+        YUV420P9LE, ///< planar YUV 4:2:0, 13.5bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
+        YUV420P10BE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), big-endian
+        YUV420P10LE,///< planar YUV 4:2:0, 15bpp, (1 Cr & Cb sample per 2x2 Y samples), little-endian
+        YUV422P10BE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
+        YUV422P10LE,///< planar YUV 4:2:2, 20bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
+        YUV444P9BE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
+        YUV444P9LE, ///< planar YUV 4:4:4, 27bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
+        YUV444P10BE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), big-endian
+        YUV444P10LE,///< planar YUV 4:4:4, 30bpp, (1 Cr & Cb sample per 1x1 Y samples), little-endian
+        YUV422P9BE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), big-endian
+        YUV422P9LE, ///< planar YUV 4:2:2, 18bpp, (1 Cr & Cb sample per 2x1 Y samples), little-endian
+        VDA_VLD,    ///< hardware decoding through VDA
+        GBRP,      ///< planar GBR 4:4:4 24bpp
+        GBRP9BE,   ///< planar GBR 4:4:4 27bpp, big endian
+        GBRP9LE,   ///< planar GBR 4:4:4 27bpp, little endian
+        GBRP10BE,  ///< planar GBR 4:4:4 30bpp, big endian
+        GBRP10LE,  ///< planar GBR 4:4:4 30bpp, little endian
+        GBRP16BE,  ///< planar GBR 4:4:4 48bpp, big endian
+        GBRP16LE,  ///< planar GBR 4:4:4 48bpp, little endian
+        COUNT      ///< number of pixel formats in this list
+        ;
+        /**
+         * Returns the matching PixelFormat value corresponding to the given PixelFormat's integer ordinal.
+         * <pre>
+         *   given:
+         *     ordinal = enumValue.ordinal()
+         *   reverse:
+         *     enumValue = EnumClass.values()[ordinal]
+         * </pre>
+         * @throws IllegalArgumentException if the given ordinal is out of range, i.e. not within [ 0 .. PixelFormat.values().length-1 ]
+         */
+        public static PixelFormat valueOf(int ordinal) throws IllegalArgumentException {
+            final PixelFormat[] all = PixelFormat.values();
+            if( 0 <= ordinal && ordinal < all.length ) {
+                return all[ordinal];
+            }
+            throw new IllegalArgumentException("Ordinal "+ordinal+" out of range of PixelFormat.values()[0.."+(all.length-1)+"]");
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGStaticNatives.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGStaticNatives.java
new file mode 100644
index 000000000..22a045825
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGStaticNatives.java
@@ -0,0 +1,41 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.util.av.impl;
+
+import com.jogamp.common.util.VersionNumber;
+
+class FFMPEGStaticNatives {
+    static VersionNumber getAVVersion(int vers) {
+        return new VersionNumber( ( vers >> 16 ) & 0xFF,
+                                  ( vers >>  8 ) & 0xFF,
+                                  ( vers >>  0 ) & 0xFF );
+    }
+    static native boolean initIDs0();
+
+    static native int getAvVersion0(long func);
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv08Natives.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv08Natives.java
new file mode 100644
index 000000000..6bab23f25
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv08Natives.java
@@ -0,0 +1,78 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.util.av.impl;
+
+class FFMPEGv08Natives extends FFMPEGNatives {
+    @Override
+    native boolean initSymbols0(Object mutex_avcodec_openclose, long[] symbols, int count);
+
+    @Override
+    native int getAvUtilMajorVersionCC0();
+
+    @Override
+    native int getAvFormatMajorVersionCC0();
+
+    @Override
+    native int getAvCodecMajorVersionCC0();
+
+    @Override
+    native int getAvResampleMajorVersionCC0();
+
+    @Override
+    native int getSwResampleMajorVersionCC0();
+
+    @Override
+    native long createInstance0(FFMPEGMediaPlayer upstream, boolean verbose);
+
+    @Override
+    native void destroyInstance0(long moviePtr);
+
+    @Override
+    native void setStream0(long moviePtr, String url, boolean isCameraInput, int vid, String sizes, int vWidth, int vHeight, int vRate, int aid, int aMaxChannelCount, int aPrefSampleRate);
+
+    @Override
+    native void setGLFuncs0(long moviePtr, long procAddrGLTexSubImage2D, long procAddrGLGetError, long procAddrGLFlush, long procAddrGLFinish);
+
+    @Override
+    native int getVideoPTS0(long moviePtr);
+
+    @Override
+    native int getAudioPTS0(long moviePtr);
+
+    @Override
+    native int readNextPacket0(long moviePtr, int texTarget, int texFmt, int texType);
+
+    @Override
+    native int play0(long moviePtr);
+
+    @Override
+    native int pause0(long moviePtr);
+
+    @Override
+    native int seek0(long moviePtr, int position);
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv09Natives.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv09Natives.java
new file mode 100644
index 000000000..a48b5f21f
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv09Natives.java
@@ -0,0 +1,78 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.util.av.impl;
+
+class FFMPEGv09Natives extends FFMPEGNatives {
+    @Override
+    native boolean initSymbols0(Object mutex_avcodec_openclose, long[] symbols, int count);
+
+    @Override
+    native int getAvUtilMajorVersionCC0();
+
+    @Override
+    native int getAvFormatMajorVersionCC0();
+
+    @Override
+    native int getAvCodecMajorVersionCC0();
+
+    @Override
+    native int getAvResampleMajorVersionCC0();
+
+    @Override
+    native int getSwResampleMajorVersionCC0();
+
+    @Override
+    native long createInstance0(FFMPEGMediaPlayer upstream, boolean verbose);
+
+    @Override
+    native void destroyInstance0(long moviePtr);
+
+    @Override
+    native void setStream0(long moviePtr, String url, boolean isCameraInput, int vid, String sizes, int vWidth, int vHeight, int vRate, int aid, int aMaxChannelCount, int aPrefSampleRate);
+
+    @Override
+    native void setGLFuncs0(long moviePtr, long procAddrGLTexSubImage2D, long procAddrGLGetError, long procAddrGLFlush, long procAddrGLFinish);
+
+    @Override
+    native int getVideoPTS0(long moviePtr);
+
+    @Override
+    native int getAudioPTS0(long moviePtr);
+
+    @Override
+    native int readNextPacket0(long moviePtr, int texTarget, int texFmt, int texType);
+
+    @Override
+    native int play0(long moviePtr);
+
+    @Override
+    native int pause0(long moviePtr);
+
+    @Override
+    native int seek0(long moviePtr, int position);
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv10Natives.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv10Natives.java
new file mode 100644
index 000000000..f35fb29dc
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGv10Natives.java
@@ -0,0 +1,78 @@
+/**
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package jogamp.opengl.util.av.impl;
+
+class FFMPEGv10Natives extends FFMPEGNatives {
+    @Override
+    native boolean initSymbols0(Object mutex_avcodec_openclose, long[] symbols, int count);
+
+    @Override
+    native int getAvUtilMajorVersionCC0();
+
+    @Override
+    native int getAvFormatMajorVersionCC0();
+
+    @Override
+    native int getAvCodecMajorVersionCC0();
+
+    @Override
+    native int getAvResampleMajorVersionCC0();
+
+    @Override
+    native int getSwResampleMajorVersionCC0();
+
+    @Override
+    native long createInstance0(FFMPEGMediaPlayer upstream, boolean verbose);
+
+    @Override
+    native void destroyInstance0(long moviePtr);
+
+    @Override
+    native void setStream0(long moviePtr, String url, boolean isCameraInput, int vid, String sizes, int vWidth, int vHeight, int vRate, int aid, int aMaxChannelCount, int aPrefSampleRate);
+
+    @Override
+    native void setGLFuncs0(long moviePtr, long procAddrGLTexSubImage2D, long procAddrGLGetError, long procAddrGLFlush, long procAddrGLFinish);
+
+    @Override
+    native int getVideoPTS0(long moviePtr);
+
+    @Override
+    native int getAudioPTS0(long moviePtr);
+
+    @Override
+    native int readNextPacket0(long moviePtr, int texTarget, int texFmt, int texType);
+
+    @Override
+    native int play0(long moviePtr);
+
+    @Override
+    native int pause0(long moviePtr);
+
+    @Override
+    native int seek0(long moviePtr, int position);
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/av/impl/OMXGLMediaPlayer.java b/src/jogl/classes/jogamp/opengl/util/av/impl/OMXGLMediaPlayer.java
index aef98fcde..05a94def8 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/OMXGLMediaPlayer.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/OMXGLMediaPlayer.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,7 +20,7 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
@@ -29,11 +29,9 @@
 package jogamp.opengl.util.av.impl;
 
 import java.io.IOException;
-import java.net.URL;
 
 import javax.media.opengl.GL;
 import javax.media.opengl.GLException;
-import javax.media.opengl.GLProfile;
 
 import com.jogamp.opengl.util.texture.TextureSequence;
 
@@ -47,18 +45,18 @@ import jogamp.opengl.util.av.EGLMediaPlayerImpl;
  */
 public class OMXGLMediaPlayer extends EGLMediaPlayerImpl {
     static final boolean available;
-    
+
     static {
-        // OMX binding is included in jogl_desktop and jogl_mobile     
+        available = false;
+        /** FIXME!
+        // OMX binding is included in jogl_desktop and jogl_mobile
         GLProfile.initSingleton();
-        available = initIDs0();
+        available = initIDs0(); */
     }
-    
+
     public static final boolean isAvailable() { return available; }
-    
+
     protected long moviePtr = 0;
-    
-    protected TextureSequence.TextureFrame lastTex = null;
 
     public OMXGLMediaPlayer() {
         super(TextureType.KHRImage, true);
@@ -72,51 +70,60 @@ public class OMXGLMediaPlayer extends EGLMediaPlayerImpl {
         moviePtr = _createInstance();
         if(0==moviePtr) {
             throw new GLException("Couldn't create OMXInstance");
-        }        
+        }
     }
-    
+
     @Override
-    protected TextureSequence.TextureFrame createTexImage(GL gl, int idx, int[] tex) {
-        final EGLTextureFrame eglTex = (EGLTextureFrame) super.createTexImage(gl, idx, tex);
-        _setStreamEGLImageTexture2D(moviePtr, idx, tex[idx], eglTex.getImage(), eglTex.getSync());
-        lastTex = eglTex;
+    protected TextureSequence.TextureFrame createTexImage(GL gl, int texName) {
+        final EGLTextureFrame eglTex = (EGLTextureFrame) super.createTexImage(gl, texName);
+        _setStreamEGLImageTexture2D(moviePtr, texName, eglTex.getImage(), eglTex.getSync());
         return eglTex;
     }
-    
+
     @Override
-    protected void destroyTexImage(GL gl, TextureSequence.TextureFrame imgTex) {
-        lastTex = null;
-        super.destroyTexImage(gl, imgTex);        
+    protected void destroyTexFrame(GL gl, TextureSequence.TextureFrame imgTex) {
+        super.destroyTexFrame(gl, imgTex);
     }
-    
+
     @Override
     protected void destroyImpl(GL gl) {
-        _detachVideoRenderer(moviePtr);
         if (moviePtr != 0) {
+            _stop(moviePtr);
+            _detachVideoRenderer(moviePtr);
             _destroyInstance(moviePtr);
             moviePtr = 0;
         }
     }
-    
+
     @Override
-    protected void initGLStreamImpl(GL gl, int[] texNames) throws IOException {
+    protected void initStreamImpl(int vid, int aid) throws IOException {
         if(0==moviePtr) {
             throw new GLException("OMX native instance null");
         }
-        final URL url = urlConn.getURL();
-        if(!url.getProtocol().equals("file")) {
-            throw new IOException("Only file URLs are allowed: "+url);            
+        if(!streamLoc.getScheme().equals("file")) {
+            throw new IOException("Only file schemes are allowed: "+streamLoc);
+        }
+        final String path=streamLoc.getPath();
+        if(DEBUG) {
+            System.out.println("initGLStream: clean path "+path);
+        }
+
+        if(DEBUG) {
+            System.out.println("initGLStream: p1 "+this);
         }
-        final String path=url.getPath();
-        System.out.println("setURL: clean path "+path);
-    
-        System.out.println("setURL: p1 "+this);
         _setStream(moviePtr, textureCount, path);
-        System.out.println("setURL: p2 "+this);        
+        if(DEBUG) {
+            System.out.println("initGLStream: p2 "+this);
+        }
     }
-    
     @Override
-    protected int getCurrentPositionImpl() {
+    protected final void initGLImpl(GL gl) throws IOException, GLException {
+        // NOP
+        isInGLOrientation = true;
+    }
+
+    @Override
+    protected int getAudioPTSImpl() {
         return 0!=moviePtr ? _getCurrentPosition(moviePtr) : 0;
     }
 
@@ -130,7 +137,7 @@ public class OMXGLMediaPlayer extends EGLMediaPlayerImpl {
     }
 
     @Override
-    public synchronized boolean startImpl() {
+    public synchronized boolean playImpl() {
         if(0==moviePtr) {
             return false;
         }
@@ -150,16 +157,6 @@ public class OMXGLMediaPlayer extends EGLMediaPlayerImpl {
 
     /** @return time position after issuing the command */
     @Override
-    public synchronized boolean stopImpl() {
-        if(0==moviePtr) {
-            return false;
-        }
-        _stop(moviePtr);
-        return true;
-    }
-
-    /** @return time position after issuing the command */
-    @Override
     protected int seekImpl(int msec) {
         if(0==moviePtr) {
             throw new GLException("OMX native instance null");
@@ -168,36 +165,33 @@ public class OMXGLMediaPlayer extends EGLMediaPlayerImpl {
     }
 
     @Override
-    protected TextureSequence.TextureFrame getLastTextureImpl() {
-        return lastTex;
-    }
-    
-    @Override
-    protected TextureSequence.TextureFrame getNextTextureImpl(GL gl, boolean blocking) {
+    protected int getNextTextureImpl(GL gl, TextureFrame nextFrame) {
         if(0==moviePtr) {
             throw new GLException("OMX native instance null");
         }
-        final int nextTex = _getNextTextureID(moviePtr, blocking);
+        final int nextTex = _getNextTextureID(moviePtr, true);
         if(0 < nextTex) {
-            final TextureSequence.TextureFrame eglImgTex = texFrameMap.get(new Integer(_getNextTextureID(moviePtr, blocking)));
+            // FIXME set pts !
+            /* FIXME
+            final TextureSequence.TextureFrame eglImgTex =
+                    texFrameMap.get(new Integer(_getNextTextureID(moviePtr, blocking)));
             if(null!=eglImgTex) {
                 lastTex = eglImgTex;
-            }
+            } */
         }
-        return lastTex;
+        return 0; // FIXME: return pts
     }
-    
+
     private String replaceAll(String orig, String search, String repl) {
-        String dest=null;
+        StringBuilder dest = new StringBuilder();
         // In case replaceAll / java.util.regex.* is not supported (-> CVM)
         int i=0,j;
-        dest = new String();
         while((j=orig.indexOf(search, i))>=0) {
-            dest=dest.concat(orig.substring(i, j));
-            dest=dest.concat(repl);
+            dest.append(orig.substring(i, j));
+            dest.append(repl);
             i=j+1;
         }
-        return dest.concat(orig.substring(i, orig.length()));
+        return dest.append(orig.substring(i, orig.length())).toString();
     }
 
     private void errorCheckEGL(String s) {
@@ -208,15 +202,15 @@ public class OMXGLMediaPlayer extends EGLMediaPlayerImpl {
     }
 
     private static native boolean initIDs0();
-    private native long _createInstance();    
+    private native long _createInstance();
     private native void _destroyInstance(long moviePtr);
-    
+
     private native void _detachVideoRenderer(long moviePtr); // stop before
     private native void _attachVideoRenderer(long moviePtr); // detach before
     private native void _setStream(long moviePtr, int textureNum, String path);
     private native void _activateStream(long moviePtr);
-    
-    private native void _setStreamEGLImageTexture2D(long moviePtr, int i, int tex, long image, long sync);
+
+    private native void _setStreamEGLImageTexture2D(long moviePtr, int tex, long image, long sync);
     private native int  _seek(long moviePtr, int position);
     private native void _setPlaySpeed(long moviePtr, float rate);
     private native void _play(long moviePtr);
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandler.java b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandler.java
index 602d283d6..1f402f48b 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandler.java
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandler.java
@@ -33,40 +33,47 @@ import java.nio.Buffer;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
 
-import jogamp.opengl.util.GLArrayHandler;
 import jogamp.opengl.util.GLArrayHandlerFlat;
+import jogamp.opengl.util.GLVBOArrayHandler;
 
 import com.jogamp.opengl.util.GLArrayDataEditable;
 import com.jogamp.opengl.util.glsl.ShaderState;
 
 /**
- * Used for 1:1 GLSL arrays, i.e. where the buffer data 
- * represents this array only. 
+ * Used for 1:1 GLSL arrays, i.e. where the buffer data
+ * represents this array only.
  */
-public class GLSLArrayHandler implements GLArrayHandler {
-  private GLArrayDataEditable ad;
+public class GLSLArrayHandler extends GLVBOArrayHandler {
 
   public GLSLArrayHandler(GLArrayDataEditable ad) {
-    this.ad = ad;
+    super(ad);
   }
-  
+
+  @Override
   public final void setSubArrayVBOName(int vboName) {
       throw new UnsupportedOperationException();
   }
-  
+
+  @Override
   public final void addSubHandler(GLArrayHandlerFlat handler) {
       throw new UnsupportedOperationException();
   }
-  
-  public final void syncData(GL gl, boolean enable, Object ext) {
+
+  @Override
+  public final void enableState(GL gl, boolean enable, Object ext) {
     final GL2ES2 glsl = gl.getGL2ES2();
-    final ShaderState st = (ShaderState) ext;
-    
+    if( null != ext ) {
+        enableShaderState(glsl, enable, (ShaderState)ext);
+    } else {
+        enableSimple(glsl, enable);
+    }
+  }
+
+  private final void enableShaderState(GL2ES2 glsl, boolean enable, ShaderState st) {
     if(enable) {
-        final Buffer buffer = ad.getBuffer();
         /*
          * This would be the non optimized code path:
-         * 
+         *
         if(ad.isVBO()) {
             glsl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
             if(!ad.isVBOWritten()) {
@@ -78,6 +85,7 @@ public class GLSLArrayHandler implements GLArrayHandler {
         }
         st.vertexAttribPointer(glsl, ad);
         */
+        final Buffer buffer = ad.getBuffer();
         if(ad.isVBO()) {
             // bind and refresh the VBO / vertex-attr only if necessary
             if(!ad.isVBOWritten()) {
@@ -87,6 +95,7 @@ public class GLSLArrayHandler implements GLArrayHandler {
                 }
                 ad.setVBOWritten(true);
                 st.vertexAttribPointer(glsl, ad);
+                glsl.glBindBuffer(ad.getVBOTarget(), 0);
             } else if(st.getAttribLocation(glsl, ad) >= 0) {
                 // didn't experience a performance hit on this query ..
                 // (using ShaderState's location query above to validate the location)
@@ -95,26 +104,69 @@ public class GLSLArrayHandler implements GLArrayHandler {
                 if(ad.getVBOName() != qi[0]) {
                     glsl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
                     st.vertexAttribPointer(glsl, ad);
+                    glsl.glBindBuffer(ad.getVBOTarget(), 0);
                 }
             }
         } else if(null!=buffer) {
             st.vertexAttribPointer(glsl, ad);
         }
-    } else if(ad.isVBO()) {
-        glsl.glBindBuffer(ad.getVBOTarget(), 0);
-    }      
-  }
-  
-  public final void enableState(GL gl, boolean enable, Object ext) {
-    final GL2ES2 glsl = gl.getGL2ES2();
-    final ShaderState st = (ShaderState) ext;
-    
-    if(enable) {
+
         st.enableVertexAttribArray(glsl, ad);
     } else {
         st.disableVertexAttribArray(glsl, ad);
     }
   }
 
+  private final void enableSimple(GL2ES2 glsl, boolean enable) {
+    final int location = ad.getLocation();
+    if( 0 > location ) {
+        return;
+    }
+    if(enable) {
+        /*
+         * This would be the non optimized code path:
+         *
+        if(ad.isVBO()) {
+            glsl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
+            if(!ad.isVBOWritten()) {
+                if(null!=buffer) {
+                    glsl.glBufferData(ad.getVBOTarget(), ad.getSizeInBytes(), buffer, ad.getVBOUsage());
+                }
+                ad.setVBOWritten(true);
+            }
+        }
+        st.vertexAttribPointer(glsl, ad);
+        */
+        final Buffer buffer = ad.getBuffer();
+        if(ad.isVBO()) {
+            // bind and refresh the VBO / vertex-attr only if necessary
+            if(!ad.isVBOWritten()) {
+                glsl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
+                if(null!=buffer) {
+                    glsl.glBufferData(ad.getVBOTarget(), ad.getSizeInBytes(), buffer, ad.getVBOUsage());
+                }
+                ad.setVBOWritten(true);
+                glsl.glVertexAttribPointer(ad);
+                glsl.glBindBuffer(ad.getVBOTarget(), 0);
+            } else {
+                // didn't experience a performance hit on this query ..
+                // (using ShaderState's location query above to validate the location)
+                final int[] qi = new int[1];
+                glsl.glGetVertexAttribiv(location, GL2ES2.GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, qi, 0);
+                if(ad.getVBOName() != qi[0]) {
+                    glsl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
+                    glsl.glVertexAttribPointer(ad);
+                    glsl.glBindBuffer(ad.getVBOTarget(), 0);
+                }
+            }
+        } else if(null!=buffer) {
+            glsl.glVertexAttribPointer(ad);
+        }
+
+        glsl.glEnableVertexAttribArray(location);
+    } else {
+        glsl.glDisableVertexAttribArray(location);
+    }
+  }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerFlat.java b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerFlat.java
index c4b761b13..34a381d7d 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerFlat.java
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerFlat.java
@@ -37,7 +37,7 @@ import com.jogamp.opengl.util.GLArrayDataWrapper;
 import com.jogamp.opengl.util.glsl.ShaderState;
 
 /**
- * Used for interleaved GLSL arrays, i.e. where the buffer data itself is handled 
+ * Used for interleaved GLSL arrays, i.e. where the buffer data itself is handled
  * separately and interleaves many arrays.
  */
 public class GLSLArrayHandlerFlat implements GLArrayHandlerFlat {
@@ -47,43 +47,57 @@ public class GLSLArrayHandlerFlat implements GLArrayHandlerFlat {
     this.ad = ad;
   }
 
+  @Override
   public GLArrayDataWrapper getData() {
       return ad;
   }
-    
-  public final void syncData(GL gl, boolean enable, boolean force, Object ext) {
-    if(enable) {
-        final GL2ES2 glsl = gl.getGL2ES2();
-        final ShaderState st = (ShaderState) ext;
 
+  @Override
+  public final void syncData(GL gl, Object ext) {
+    final GL2ES2 glsl = gl.getGL2ES2();
+    if( null != ext ) {
+        ((ShaderState)ext).vertexAttribPointer(glsl, ad);
+    } else {
+        if( 0 <= ad.getLocation() ) {
+            glsl.glVertexAttribPointer(ad);
+        }
+    }
+    /**
+     * Due to probable application VBO switching, this might not make any sense ..
+     *
+    if(!written) {
         st.vertexAttribPointer(glsl, ad);
-        /**
-         * Due to probable application VBO switching, this might not make any sense ..
-         * 
-        if(force) {
+    } else if(st.getAttribLocation(glsl, ad) >= 0) {
+        final int[] qi = new int[1];
+        glsl.glGetVertexAttribiv(ad.getLocation(), GL2ES2.GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, qi, 0);
+        if(ad.getVBOName() != qi[0]) {
+            System.err.println("XXX1: "+ad.getName()+", vbo ad "+ad.getVBOName()+", gl "+qi[0]+", "+ad);
             st.vertexAttribPointer(glsl, ad);
-        } else if(st.getAttribLocation(glsl, ad) >= 0) {
-            final int[] qi = new int[1];
-            glsl.glGetVertexAttribiv(ad.getLocation(), GL2ES2.GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING, qi, 0);
-            if(ad.getVBOName() != qi[0]) {
-                System.err.println("XXX1: "+ad.getName()+", vbo ad "+ad.getVBOName()+", gl "+qi[0]+", "+ad);
-                st.vertexAttribPointer(glsl, ad);
-            } else {
-                System.err.println("XXX0: "+ad.getName()+", vbo ad "+ad.getVBOName()+", gl "+qi[0]+", "+ad);
-            }
-        }*/
-    }
+        } else {
+            System.err.println("XXX0: "+ad.getName()+", vbo ad "+ad.getVBOName()+", gl "+qi[0]+", "+ad);
+        }
+    }*/
   }
 
+  @Override
   public final void enableState(GL gl, boolean enable, Object ext) {
     final GL2ES2 glsl = gl.getGL2ES2();
-    final ShaderState st = (ShaderState) ext;
-    
-    if(enable) {
-        st.enableVertexAttribArray(glsl, ad);
+    if( null != ext ) {
+        final ShaderState st = (ShaderState)ext;
+        if(enable) {
+            st.enableVertexAttribArray(glsl, ad);
+        } else {
+            st.disableVertexAttribArray(glsl, ad);
+        }
     } else {
-        st.disableVertexAttribArray(glsl, ad);
+        final int location = ad.getLocation();
+        if( 0 <= location ) {
+            if(enable) {
+                glsl.glEnableVertexAttribArray(location);
+            } else {
+                glsl.glDisableVertexAttribArray(location);
+            }
+        }
     }
-  }  
+  }
 }
-
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerInterleaved.java b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerInterleaved.java
index f50429623..e153082e0 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerInterleaved.java
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLArrayHandlerInterleaved.java
@@ -28,75 +28,59 @@
 
 package jogamp.opengl.util.glsl;
 
-import java.nio.Buffer;
 import java.util.ArrayList;
 import java.util.List;
 
 import javax.media.opengl.GL;
 
-import jogamp.opengl.util.GLArrayHandler;
 import jogamp.opengl.util.GLArrayHandlerFlat;
+import jogamp.opengl.util.GLVBOArrayHandler;
 
 import com.jogamp.opengl.util.GLArrayDataEditable;
 
 /**
- * Interleaved fixed function arrays, i.e. where this buffer data 
- * represents many arrays. 
+ * Interleaved fixed function arrays, i.e. where this buffer data
+ * represents many arrays.
  */
-public class GLSLArrayHandlerInterleaved implements GLArrayHandler {
-  private GLArrayDataEditable ad;
-  private List<GLArrayHandlerFlat> subArrays = new ArrayList<GLArrayHandlerFlat>();
+public class GLSLArrayHandlerInterleaved extends GLVBOArrayHandler {
+  private final List<GLArrayHandlerFlat> subArrays = new ArrayList<GLArrayHandlerFlat>();
 
   public GLSLArrayHandlerInterleaved(GLArrayDataEditable ad) {
-    this.ad = ad;
+    super(ad);
   }
-  
+
+  @Override
   public final void setSubArrayVBOName(int vboName) {
       for(int i=0; i<subArrays.size(); i++) {
           subArrays.get(i).getData().setVBOName(vboName);
-      }      
+      }
   }
-  
+
+  @Override
   public final void addSubHandler(GLArrayHandlerFlat handler) {
       subArrays.add(handler);
   }
 
-  private final void syncSubData(GL gl, boolean enable, boolean force, Object ext) {
+  private final void syncSubData(GL gl, Object ext) {
       for(int i=0; i<subArrays.size(); i++) {
-          subArrays.get(i).syncData(gl, enable, force, ext);
-      }      
-  }  
-  
-  public final void syncData(GL gl, boolean enable, Object ext) {    
-    if(!ad.isVBO()) {
-        throw new InternalError("Interleaved handle is not VBO: "+ad);
-    }
-    
+          subArrays.get(i).syncData(gl, ext);
+      }
+  }
+
+  @Override
+  public final void enableState(GL gl, boolean enable, Object ext) {
     if(enable) {
-        final Buffer buffer = ad.getBuffer();
-        final boolean vboWritten = ad.isVBOWritten();
-        
-        // always bind and refresh the VBO mgr, 
-        // in case more than one gl*Pointer objects are in use
-        gl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
-        if(!vboWritten) {
-            if(null!=buffer) {
-                gl.glBufferData(ad.getVBOTarget(), buffer.limit() * ad.getComponentSizeInBytes(), buffer, ad.getVBOUsage());
-            }
-            ad.setVBOWritten(true);
+        if(!ad.isVBO()) {
+            throw new InternalError("Interleaved handle is not VBO: "+ad);
         }
-        // sub data will decide weather to update the vertex attrib pointer
-        syncSubData(gl, true, !vboWritten, ext);
-    } else {
-        // NOP on GLSL: syncSubData(gl, false, ext);
-        gl.glBindBuffer(ad.getVBOTarget(), 0);
+        bindBuffer(gl, true);
+        // sub data will decide whether to update the vertex attrib pointer
+        syncSubData(gl, ext);
+        bindBuffer(gl, false);
     }
-  }
-  
-  public final void enableState(GL gl, boolean enable, Object ext) {
     for(int i=0; i<subArrays.size(); i++) {
         subArrays.get(i).enableState(gl, enable, ext);
-    }      
+    }
   }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/GLSLTextureRaster.java b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLTextureRaster.java
new file mode 100644
index 000000000..dba408554
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/GLSLTextureRaster.java
@@ -0,0 +1,195 @@
+/**
+ * Copyright 2012 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl.util.glsl;
+
+import java.nio.FloatBuffer;
+
+import com.jogamp.opengl.util.GLArrayDataServer;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.ShaderCode;
+import com.jogamp.opengl.util.glsl.ShaderProgram;
+
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GLArrayData;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLUniformData;
+import javax.media.opengl.fixedfunc.GLMatrixFunc;
+
+public class GLSLTextureRaster  {
+    private final boolean textureVertFlipped;
+    private final int textureUnit;
+
+    private ShaderProgram sp;
+    private PMVMatrix pmvMatrix;
+    private GLUniformData pmvMatrixUniform;
+    private GLUniformData activeTexUniform;
+    private GLArrayDataServer interleavedVBO;
+
+    public GLSLTextureRaster(int textureUnit, boolean textureVertFlipped) {
+        this.textureVertFlipped = textureVertFlipped;
+        this.textureUnit = textureUnit;
+    }
+
+    public int getTextureUnit() { return textureUnit; }
+
+    static final String shaderBasename = "texture01_xxx";
+    static final String shaderSrcPath = "../../shader";
+    static final String shaderBinPath = "../../shader/bin";
+
+    public void init(GL2ES2 gl) {
+        // Create & Compile the shader objects
+        final ShaderCode rsVp = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, this.getClass(),
+                                                  shaderSrcPath, shaderBinPath, shaderBasename, true);
+        final ShaderCode rsFp = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, this.getClass(),
+                                                  shaderSrcPath, shaderBinPath, shaderBasename, true);
+        rsVp.defaultShaderCustomization(gl, true, true);
+        rsFp.defaultShaderCustomization(gl, true, true);
+
+        // Create & Link the shader program
+        sp = new ShaderProgram();
+        sp.add(rsVp);
+        sp.add(rsFp);
+        if(!sp.link(gl, System.err)) {
+            throw new GLException("Couldn't link program: "+sp);
+        }
+        sp.useProgram(gl, true);
+
+        // setup mgl_PMVMatrix
+        pmvMatrix = new PMVMatrix();
+        pmvMatrix.glMatrixMode(PMVMatrix.GL_PROJECTION);
+        pmvMatrix.glLoadIdentity();
+        pmvMatrix.glMatrixMode(PMVMatrix.GL_MODELVIEW);
+        pmvMatrix.glLoadIdentity();
+        pmvMatrixUniform = new GLUniformData("mgl_PMVMatrix", 4, 4, pmvMatrix.glGetPMvMatrixf()); // P, Mv
+        if( pmvMatrixUniform.setLocation(gl, sp.program()) < 0 ) {
+            throw new GLException("Couldn't locate "+pmvMatrixUniform+" in shader: "+sp);
+        }
+        gl.glUniform(pmvMatrixUniform);
+
+        activeTexUniform = new GLUniformData("mgl_Texture0", textureUnit);
+        if( activeTexUniform.setLocation(gl, sp.program()) < 0 ) {
+            throw new GLException("Couldn't locate "+activeTexUniform+" in shader: "+sp);
+        }
+        gl.glUniform(activeTexUniform);
+
+        final float[] s_quadTexCoords;
+        if( textureVertFlipped ) {
+            s_quadTexCoords = s_quadTexCoords01;
+        } else {
+            s_quadTexCoords = s_quadTexCoords00;
+        }
+
+        interleavedVBO = GLArrayDataServer.createGLSLInterleaved(3+2, GL.GL_FLOAT, false, 2*4, GL.GL_STATIC_DRAW);
+        {
+            final GLArrayData vArrayData = interleavedVBO.addGLSLSubArray("mgl_Vertex",        3, GL.GL_ARRAY_BUFFER);
+            if( vArrayData.setLocation(gl, sp.program()) < 0 ) {
+                throw new GLException("Couldn't locate "+vArrayData+" in shader: "+sp);
+            }
+            final GLArrayData tArrayData = interleavedVBO.addGLSLSubArray("mgl_MultiTexCoord", 2, GL.GL_ARRAY_BUFFER);
+            if( tArrayData.setLocation(gl, sp.program()) < 0 ) {
+                throw new GLException("Couldn't locate "+tArrayData+" in shader: "+sp);
+            }
+            final FloatBuffer ib = (FloatBuffer)interleavedVBO.getBuffer();
+            for(int i=0; i<4; i++) {
+                ib.put(s_quadVertices,  i*3, 3);
+                ib.put(s_quadTexCoords, i*2, 2);
+            }
+        }
+        interleavedVBO.seal(gl, true);
+        interleavedVBO.enableBuffer(gl, false);
+
+        sp.useProgram(gl, false);
+    }
+
+    public void reshape(GL2ES2 gl, int x, int y, int width, int height) {
+        if(null != sp) {
+            pmvMatrix.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
+            pmvMatrix.glLoadIdentity();
+            pmvMatrix.glOrthof(-1.0f, 1.0f, -1.0f, 1.0f, 0.0f, 10.0f);
+
+            pmvMatrix.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
+            pmvMatrix.glLoadIdentity();
+
+            sp.useProgram(gl, true);
+            gl.glUniform(pmvMatrixUniform);
+            sp.useProgram(gl, false);
+        }
+    }
+
+    public void dispose(GL2ES2 gl) {
+        if(null != pmvMatrixUniform) {
+            pmvMatrixUniform = null;
+        }
+        if(null != pmvMatrix) {
+            pmvMatrix.destroy();
+            pmvMatrix=null;
+        }
+        if(null != interleavedVBO) {
+            interleavedVBO.destroy(gl);
+            interleavedVBO=null;
+        }
+        if(null != sp) {
+            sp.destroy(gl);
+            sp=null;
+        }
+    }
+
+    public void display(GL2ES2 gl) {
+        if(null != sp) {
+            sp.useProgram(gl, true);
+            interleavedVBO.enableBuffer(gl, true);
+
+            gl.glDrawArrays(GL.GL_TRIANGLE_STRIP, 0, 4);
+
+            interleavedVBO.enableBuffer(gl, false);
+            sp.useProgram(gl, false);
+        }
+    }
+
+    private static final float[] s_quadVertices = {
+      -1f, -1f, 0f, // LB
+       1f, -1f, 0f, // RB
+      -1f,  1f, 0f, // LT
+       1f,  1f, 0f  // RT
+    };
+    private static final float[] s_quadTexCoords00 = {
+        0f, 0f, // LB
+        1f, 0f, // RB
+        0f, 1f, // LT
+        1f, 1f  // RT
+    };
+    private static final float[] s_quadTexCoords01 = {
+        0f, 1f, // LB
+        1f, 1f, // RB
+        0f, 0f, // LT
+        1f, 0f  // RT
+    };
+}
+
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncHook.java b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncHook.java
index 897967f8b..458a9c94f 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncHook.java
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncHook.java
@@ -29,87 +29,115 @@
 
 package jogamp.opengl.util.glsl.fixedfunc;
 
-import javax.media.opengl.*;
-import javax.media.opengl.fixedfunc.*;
-import com.jogamp.common.nio.Buffers;
-import com.jogamp.opengl.util.*;
+import java.nio.Buffer;
+import java.nio.IntBuffer;
+
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GLArrayData;
+import javax.media.opengl.GLException;
+import javax.media.opengl.fixedfunc.GLLightingFunc;
+import javax.media.opengl.fixedfunc.GLMatrixFunc;
+import javax.media.opengl.fixedfunc.GLPointerFunc;
 
-import java.nio.*;
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.util.ValueConv;
+import com.jogamp.opengl.util.GLArrayDataWrapper;
+import com.jogamp.opengl.util.GLBuffers;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.fixedfunc.ShaderSelectionMode;
 
 public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFunc {
     public static final int MAX_TEXTURE_UNITS = 8;
 
-    protected FixedFuncPipeline fixedFunction=null;
-    protected PMVMatrix pmvMatrix=null;
-    protected GL2ES2 gl=null;
+    protected FixedFuncPipeline fixedFunction;
+    protected PMVMatrix pmvMatrix;
+    protected boolean ownsPMVMatrix;
+    protected GL2ES2 gl;
 
-    public FixedFuncHook (GL2ES2 gl) {
-        this(gl, null);
+    /**
+     * @param gl
+     * @param mode TODO
+     * @param pmvMatrix optional pass through PMVMatrix for the {@link FixedFuncHook} and {@link FixedFuncPipeline}
+     */
+    public FixedFuncHook (GL2ES2 gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix) {
+        this.gl = gl;
+        if(null != pmvMatrix) {
+            this.ownsPMVMatrix = false;
+            this.pmvMatrix = pmvMatrix;
+        } else {
+            this.ownsPMVMatrix = true;
+            this.pmvMatrix = new PMVMatrix();
+        }
+        fixedFunction = new FixedFuncPipeline(this.gl, mode, this.pmvMatrix);
     }
 
-    public FixedFuncHook (GL2ES2 gl, PMVMatrix matrix) {
+    /**
+     * @param gl
+     * @param mode TODO
+     * @param pmvMatrix optional pass through PMVMatrix for the {@link FixedFuncHook} and {@link FixedFuncPipeline}
+     */
+    public FixedFuncHook(GL2ES2 gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix,
+                         Class<?> shaderRootClass, String shaderSrcRoot, String shaderBinRoot,
+                         String vertexColorFile, String vertexColorLightFile,
+                         String fragmentColorFile, String fragmentColorTextureFile) {
         this.gl = gl;
-        pmvMatrix = (null!=matrix)?matrix:new PMVMatrix();
+        if(null != pmvMatrix) {
+            this.ownsPMVMatrix = false;
+            this.pmvMatrix = pmvMatrix;
+        } else {
+            this.ownsPMVMatrix = true;
+            this.pmvMatrix = new PMVMatrix();
+        }
 
-        fixedFunction = new FixedFuncPipeline(gl, pmvMatrix);
+        fixedFunction = new FixedFuncPipeline(this.gl, mode, this.pmvMatrix, shaderRootClass, shaderSrcRoot,
+                                              shaderBinRoot, vertexColorFile, vertexColorLightFile, fragmentColorFile, fragmentColorTextureFile);
     }
 
-    public FixedFuncHook(GL2ES2 gl, PMVMatrix matrix, 
-                       Class<?> shaderRootClass, String shaderSrcRoot, String shaderBinRoot, 
-                       String vertexColorFile,
-                       String vertexColorLightFile,
-                       String fragmentColorFile,
-                       String fragmentColorTextureFile) {
-        this.gl = gl;
-        pmvMatrix = matrix;
+    public boolean verbose() { return fixedFunction.verbose(); }
 
-        fixedFunction = new FixedFuncPipeline(gl, pmvMatrix,
-                                              shaderRootClass, shaderSrcRoot, shaderBinRoot, 
-                                              vertexColorFile, vertexColorLightFile, fragmentColorFile, fragmentColorTextureFile);
-    }
+    public void setVerbose(boolean v) { fixedFunction.setVerbose(v); }
 
     public void destroy() {
         fixedFunction.destroy(gl);
         fixedFunction = null;
+        if(ownsPMVMatrix) {
+            pmvMatrix.destroy();
+        }
+        pmvMatrix=null;
+        gl=null;
     }
 
     public PMVMatrix getMatrix() { return pmvMatrix; }
 
     //
-    // FixedFuncHookIf - hooks 
+    // FixedFuncHookIf - hooks
     //
     public void glDrawArrays(int mode, int first, int count) {
-        fixedFunction.validate(gl); 
-        gl.glDrawArrays(mode, first, count);
+        fixedFunction.glDrawArrays(gl, mode, first, count);
     }
     public void glDrawElements(int mode, int count, int type, java.nio.Buffer indices) {
-        fixedFunction.validate(gl); 
-        gl.glDrawElements(mode, count, type, indices);
+        fixedFunction.glDrawElements(gl, mode, count, type, indices);
     }
     public void glDrawElements(int mode, int count, int type, long indices_buffer_offset) {
-        fixedFunction.validate(gl); 
-        gl.glDrawElements(mode, count, type, indices_buffer_offset);
+        fixedFunction.glDrawElements(gl, mode, count, type, indices_buffer_offset);
     }
 
     public void glActiveTexture(int texture) {
-        fixedFunction.glActiveTexture(gl, texture);
+        fixedFunction.glActiveTexture(texture);
         gl.glActiveTexture(texture);
     }
     public void glEnable(int cap) {
-        if(fixedFunction.glEnable(gl, cap, true)) {
+        if(fixedFunction.glEnable(cap, true)) {
             gl.glEnable(cap);
         }
     }
     public void glDisable(int cap) {
-        if(fixedFunction.glEnable(gl, cap, false)) {
+        if(fixedFunction.glEnable(cap, false)) {
             gl.glDisable(cap);
         }
     }
-    public void glCullFace(int faceName) {
-        fixedFunction.glCullFace(gl, faceName);
-        gl.glCullFace(faceName);
-    }
-
+    @Override
     public void glGetFloatv(int pname, java.nio.FloatBuffer params) {
         if(PMVMatrix.isMatrixGetName(pname)) {
             pmvMatrix.glGetFloatv(pname, params);
@@ -117,6 +145,7 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
         }
         gl.glGetFloatv(pname, params);
     }
+    @Override
     public void glGetFloatv(int pname, float[] params, int params_offset) {
         if(PMVMatrix.isMatrixGetName(pname)) {
             pmvMatrix.glGetFloatv(pname, params, params_offset);
@@ -124,6 +153,7 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
         }
         gl.glGetFloatv(pname, params, params_offset);
     }
+    @Override
     public void glGetIntegerv(int pname, IntBuffer params) {
         if(PMVMatrix.isMatrixGetName(pname)) {
             pmvMatrix.glGetIntegerv(pname, params);
@@ -131,6 +161,7 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
         }
         gl.glGetIntegerv(pname, params);
     }
+    @Override
     public void glGetIntegerv(int pname, int[] params, int params_offset) {
         if(PMVMatrix.isMatrixGetName(pname)) {
             pmvMatrix.glGetIntegerv(pname, params, params_offset);
@@ -139,95 +170,193 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
         gl.glGetIntegerv(pname, params, params_offset);
     }
 
-    // 
+    public void glTexEnvi(int target, int pname, int value) {
+        fixedFunction.glTexEnvi(target, pname, value);
+    }
+    public void glGetTexEnviv(int target, int pname,  IntBuffer params) {
+        fixedFunction.glGetTexEnviv(target, pname, params);
+    }
+    public void glGetTexEnviv(int target, int pname,  int[] params, int params_offset) {
+        fixedFunction.glGetTexEnviv(target, pname, params, params_offset);
+    }
+    public void glBindTexture(int target, int texture) {
+        fixedFunction.glBindTexture(target, texture);
+        gl.glBindTexture(target, texture);
+    }
+    public void glTexImage2D(int target, int level, int internalformat, int width, int height, int border,
+                             int format, int type,  Buffer pixels) {
+        // align internalformat w/ format, an ES2 requirement
+        switch(internalformat) {
+            case 3: internalformat= ( GL.GL_RGBA == format ) ? GL.GL_RGBA : GL.GL_RGB; break;
+            case 4: internalformat= ( GL.GL_RGB  == format ) ? GL.GL_RGB  : GL.GL_RGBA; break;
+        }
+        fixedFunction.glTexImage2D(target, /* level, */ internalformat, /*width, height, border, */ format /*, type, pixels*/);
+        gl.glTexImage2D(target, level, internalformat, width, height, border, format, type, pixels);
+    }
+    public void glTexImage2D(int target, int level, int internalformat, int width, int height, int border,
+                             int format, int type,  long pixels_buffer_offset) {
+        // align internalformat w/ format, an ES2 requirement
+        switch(internalformat) {
+            case 3: internalformat= ( GL.GL_RGBA == format ) ? GL.GL_RGBA : GL.GL_RGB; break;
+            case 4: internalformat= ( GL.GL_RGB  == format ) ? GL.GL_RGB  : GL.GL_RGBA; break;
+        }
+        fixedFunction.glTexImage2D(target, /* level, */ internalformat, /*width, height, border, */ format /*, type, pixels*/);
+        gl.glTexImage2D(target, level, internalformat, width, height, border, format, type, pixels_buffer_offset);
+    }
+
+    public void glPointSize(float size) {
+        fixedFunction.glPointSize(size);
+    }
+    public  void glPointParameterf(int pname, float param) {
+        fixedFunction.glPointParameterf(pname, param);
+    }
+    public  void glPointParameterfv(int pname, float[] params, int params_offset) {
+        fixedFunction.glPointParameterfv(pname, params, params_offset);
+    }
+    public  void glPointParameterfv(int pname, java.nio.FloatBuffer params) {
+        fixedFunction.glPointParameterfv(pname, params);
+    }
+
+    //
     // MatrixIf
     //
     public int  glGetMatrixMode() {
         return pmvMatrix.glGetMatrixMode();
     }
+    @Override
     public void glMatrixMode(int mode) {
         pmvMatrix.glMatrixMode(mode);
     }
+    @Override
     public void glLoadMatrixf(java.nio.FloatBuffer m) {
         pmvMatrix.glLoadMatrixf(m);
     }
+    @Override
     public void glLoadMatrixf(float[] m, int m_offset) {
         glLoadMatrixf(GLBuffers.newDirectFloatBuffer(m, m_offset));
     }
+    @Override
     public void glPopMatrix() {
         pmvMatrix.glPopMatrix();
     }
+    @Override
     public void glPushMatrix() {
         pmvMatrix.glPushMatrix();
     }
+    @Override
     public void glLoadIdentity() {
         pmvMatrix.glLoadIdentity();
     }
+    @Override
     public void glMultMatrixf(java.nio.FloatBuffer m) {
         pmvMatrix.glMultMatrixf(m);
     }
+    @Override
     public void glMultMatrixf(float[] m, int m_offset) {
         glMultMatrixf(GLBuffers.newDirectFloatBuffer(m, m_offset));
     }
+    @Override
     public void glTranslatef(float x, float y, float z) {
         pmvMatrix.glTranslatef(x, y, z);
     }
+    @Override
     public void glRotatef(float angdeg, float x, float y, float z) {
         pmvMatrix.glRotatef(angdeg, x, y, z);
     }
+    @Override
     public void glScalef(float x, float y, float z) {
         pmvMatrix.glScalef(x, y, z);
     }
+    public void glOrtho(double left, double right, double bottom, double top, double near_val, double far_val) {
+        glOrthof((float) left, (float) right, (float) bottom, (float) top, (float) near_val, (float) far_val);
+    }
+    @Override
     public void glOrthof(float left, float right, float bottom, float top, float zNear, float zFar) {
         pmvMatrix.glOrthof(left, right, bottom, top, zNear, zFar);
     }
+    public void glFrustum(double left, double right, double bottom, double top, double zNear, double zFar) {
+        glFrustumf((float) left, (float) right, (float) bottom, (float) top, (float) zNear, (float) zFar);
+    }
+    @Override
     public void glFrustumf(float left, float right, float bottom, float top, float zNear, float zFar) {
         pmvMatrix.glFrustumf(left, right, bottom, top, zNear, zFar);
     }
 
-    // 
+    //
     // LightingIf
     //
+    @Override
     public void glColor4f(float red, float green, float blue, float alpha) {
-      fixedFunction.glColor4fv(gl, GLBuffers.newDirectFloatBuffer(new float[] { red, green, blue, alpha }));
+      fixedFunction.glColor4f(gl, red, green, blue, alpha);
     }
 
+    public  void glColor4ub(byte red, byte green, byte blue, byte alpha) {
+      glColor4f(ValueConv.byte_to_float(red, false),
+                ValueConv.byte_to_float(green, false),
+                ValueConv.byte_to_float(blue, false),
+                ValueConv.byte_to_float(alpha, false) );
+    }
+    @Override
     public void glLightfv(int light, int pname, java.nio.FloatBuffer params) {
       fixedFunction.glLightfv(gl, light, pname, params);
     }
+    @Override
     public void glLightfv(int light, int pname, float[] params, int params_offset) {
         glLightfv(light, pname, GLBuffers.newDirectFloatBuffer(params, params_offset));
     }
+    @Override
     public void glMaterialfv(int face, int pname, java.nio.FloatBuffer params) {
       fixedFunction.glMaterialfv(gl, face, pname, params);
     }
+    @Override
     public void glMaterialfv(int face, int pname, float[] params, int params_offset) {
         glMaterialfv(face, pname, GLBuffers.newDirectFloatBuffer(params, params_offset));
     }
+    @Override
     public void glMaterialf(int face, int pname, float param) {
         glMaterialfv(face, pname, GLBuffers.newDirectFloatBuffer(new float[] { param }));
     }
+
+    //
+    // Misc Simple States
+    //
+    @Override
     public void glShadeModel(int mode) {
       fixedFunction.glShadeModel(gl, mode);
     }
+    public  void glAlphaFunc(int func, float ref) {
+        fixedFunction.glAlphaFunc(func, ref);
+    }
+
+    /** ES2 supports CullFace implicit
+    public void glCullFace(int faceName) {
+        fixedFunction.glCullFace(faceName);
+        gl.glCullFace(faceName);
+    } */
 
     //
     // PointerIf
     //
+    public void glClientActiveTexture(int textureUnit) {
+      fixedFunction.glClientActiveTexture(textureUnit);
+    }
+    @Override
     public void glEnableClientState(int glArrayIndex) {
       fixedFunction.glEnableClientState(gl, glArrayIndex);
     }
+    @Override
     public void glDisableClientState(int glArrayIndex) {
       fixedFunction.glDisableClientState(gl, glArrayIndex);
     }
 
+    @Override
     public void glVertexPointer(GLArrayData array) {
       if(array.isVBO()) {
-          if(!gl.glIsVBOArrayEnabled()) {
+          if(!gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not enabled: "+array);
           }
       } else {
-          if(gl.glIsVBOArrayEnabled()) {
+          if(gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not disabled: "+array);
           }
           Buffers.rangeCheck(array.getBuffer(), 1);
@@ -237,25 +366,29 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
       fixedFunction.glVertexPointer(gl, array);
     }
 
+    @Override
     public void glVertexPointer(int size, int type, int stride, java.nio.Buffer pointer) {
-      glVertexPointer(GLArrayDataWrapper.createFixed(GL_VERTEX_ARRAY, size, type, false, stride, pointer, 0, 0, 0, GL.GL_ARRAY_BUFFER));
+      glVertexPointer(GLArrayDataWrapper.createFixed(GL_VERTEX_ARRAY, size, type, GLBuffers.isGLTypeFixedPoint(type), stride,
+                                                     pointer, 0, 0, 0, GL.GL_ARRAY_BUFFER));
     }
+    @Override
     public void glVertexPointer(int size, int type, int stride, long pointer_buffer_offset) {
-      int vboName = gl.glGetBoundBuffer(GL.GL_ARRAY_BUFFER);
+      int vboName = gl.getBoundBuffer(GL.GL_ARRAY_BUFFER);
       if(vboName==0) {
         throw new GLException("no GL_ARRAY_BUFFER VBO bound");
       }
-      glVertexPointer(GLArrayDataWrapper.createFixed(GL_VERTEX_ARRAY, size, type, false, stride, 
+      glVertexPointer(GLArrayDataWrapper.createFixed(GL_VERTEX_ARRAY, size, type, GLBuffers.isGLTypeFixedPoint(type), stride,
                                                      null, vboName, pointer_buffer_offset, GL.GL_STATIC_DRAW, GL.GL_ARRAY_BUFFER));
     }
 
+    @Override
     public void glColorPointer(GLArrayData array) {
       if(array.isVBO()) {
-          if(!gl.glIsVBOArrayEnabled()) {
+          if(!gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not enabled: "+array);
           }
       } else {
-          if(gl.glIsVBOArrayEnabled()) {
+          if(gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not disabled: "+array);
           }
           Buffers.rangeCheck(array.getBuffer(), 1);
@@ -264,29 +397,32 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
       }
       fixedFunction.glColorPointer(gl, array);
     }
+    @Override
     public void glColorPointer(int size, int type, int stride, java.nio.Buffer pointer) {
-      glColorPointer(GLArrayDataWrapper.createFixed(GL_COLOR_ARRAY, size, type, false, stride, 
+      glColorPointer(GLArrayDataWrapper.createFixed(GL_COLOR_ARRAY, size, type, GLBuffers.isGLTypeFixedPoint(type), stride,
                                                     pointer, 0, 0, 0, GL.GL_ARRAY_BUFFER));
     }
+    @Override
     public void glColorPointer(int size, int type, int stride, long pointer_buffer_offset) {
-      int vboName = gl.glGetBoundBuffer(GL.GL_ARRAY_BUFFER);
+      int vboName = gl.getBoundBuffer(GL.GL_ARRAY_BUFFER);
       if(vboName==0) {
         throw new GLException("no GL_ARRAY_BUFFER VBO bound");
       }
-      glColorPointer(GLArrayDataWrapper.createFixed(GL_COLOR_ARRAY, size, type, false, stride, 
+      glColorPointer(GLArrayDataWrapper.createFixed(GL_COLOR_ARRAY, size, type, GLBuffers.isGLTypeFixedPoint(type), stride,
                                                    null, vboName, pointer_buffer_offset, GL.GL_STATIC_DRAW, GL.GL_ARRAY_BUFFER));
     }
 
+    @Override
     public void glNormalPointer(GLArrayData array) {
       if(array.getComponentCount()!=3) {
         throw new GLException("Only 3 components per normal allowed");
       }
       if(array.isVBO()) {
-          if(!gl.glIsVBOArrayEnabled()) {
+          if(!gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not enabled: "+array);
           }
       } else {
-          if(gl.glIsVBOArrayEnabled()) {
+          if(gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not disabled: "+array);
           }
           Buffers.rangeCheck(array.getBuffer(), 1);
@@ -295,26 +431,29 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
       }
       fixedFunction.glNormalPointer(gl, array);
     }
+    @Override
     public void glNormalPointer(int type, int stride, java.nio.Buffer pointer) {
-      glNormalPointer(GLArrayDataWrapper.createFixed(GL_NORMAL_ARRAY, 3, type, false, stride, 
+      glNormalPointer(GLArrayDataWrapper.createFixed(GL_NORMAL_ARRAY, 3, type, GLBuffers.isGLTypeFixedPoint(type), stride,
                                                      pointer, 0, 0, 0, GL.GL_ARRAY_BUFFER));
     }
+    @Override
     public void glNormalPointer(int type, int stride, long pointer_buffer_offset) {
-      int vboName = gl.glGetBoundBuffer(GL.GL_ARRAY_BUFFER);
+      int vboName = gl.getBoundBuffer(GL.GL_ARRAY_BUFFER);
       if(vboName==0) {
         throw new GLException("no GL_ARRAY_BUFFER VBO bound");
       }
-      glNormalPointer(GLArrayDataWrapper.createFixed(GL_NORMAL_ARRAY, 3, type, false, stride, 
+      glNormalPointer(GLArrayDataWrapper.createFixed(GL_NORMAL_ARRAY, 3, type, GLBuffers.isGLTypeFixedPoint(type), stride,
                                                      null, vboName, pointer_buffer_offset, GL.GL_STATIC_DRAW, GL.GL_ARRAY_BUFFER));
     }
 
+    @Override
     public void glTexCoordPointer(GLArrayData array) {
       if(array.isVBO()) {
-          if(!gl.glIsVBOArrayEnabled()) {
+          if(!gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not enabled: "+array);
           }
       } else {
-          if(gl.glIsVBOArrayEnabled()) {
+          if(gl.isVBOArrayBound()) {
             throw new GLException("VBO array is not disabled: "+array);
           }
           Buffers.rangeCheck(array.getBuffer(), 1);
@@ -323,25 +462,29 @@ public class FixedFuncHook implements GLLightingFunc, GLMatrixFunc, GLPointerFun
       }
       fixedFunction.glTexCoordPointer(gl, array);
     }
+    @Override
     public void glTexCoordPointer(int size, int type, int stride, java.nio.Buffer pointer) {
       glTexCoordPointer(
-        GLArrayDataWrapper.createFixed(GL_TEXTURE_COORD_ARRAY, size, type, false, stride, pointer, 0, 0, 0, GL.GL_ARRAY_BUFFER));
+        GLArrayDataWrapper.createFixed(GL_TEXTURE_COORD_ARRAY, size, type, GLBuffers.isGLTypeFixedPoint(type), stride,
+                                       pointer, 0, 0, 0, GL.GL_ARRAY_BUFFER));
     }
+    @Override
     public void glTexCoordPointer(int size, int type, int stride, long pointer_buffer_offset) {
-      int vboName = gl.glGetBoundBuffer(GL.GL_ARRAY_BUFFER);
+      int vboName = gl.getBoundBuffer(GL.GL_ARRAY_BUFFER);
       if(vboName==0) {
         throw new GLException("no GL_ARRAY_BUFFER VBO bound");
       }
       glTexCoordPointer(
-        GLArrayDataWrapper.createFixed(GL_TEXTURE_COORD_ARRAY, size, type, false, stride, 
+        GLArrayDataWrapper.createFixed(GL_TEXTURE_COORD_ARRAY, size, type, GLBuffers.isGLTypeFixedPoint(type), stride,
                                        null, vboName, pointer_buffer_offset, GL.GL_STATIC_DRAW, GL.GL_ARRAY_BUFFER) );
     }
 
+    @Override
     public final String toString() {
           StringBuilder buf = new StringBuilder();
           buf.append(getClass().getName()+" (");
           if(null!=pmvMatrix) {
-              buf.append(", matrixDirty: "+pmvMatrix.isDirty());
+              buf.append(", matrixDirty: "+ (0 != pmvMatrix.getModifiedBits(false)));
           }
           buf.append("\n\t, FixedFunction: "+fixedFunction);
           buf.append(gl);
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncPipeline.java b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncPipeline.java
index bfe2e13c2..42269588d 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncPipeline.java
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncPipeline.java
@@ -29,33 +29,87 @@
 
 package jogamp.opengl.util.glsl.fixedfunc;
 
+import java.nio.ByteBuffer;
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+import java.nio.ShortBuffer;
+
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GL2ES1;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GL2GL3;
+import javax.media.opengl.GLArrayData;
+import javax.media.opengl.GLES2;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLRunnable2;
+import javax.media.opengl.GLUniformData;
+import javax.media.opengl.fixedfunc.GLLightingFunc;
+import javax.media.opengl.fixedfunc.GLPointerFunc;
+import javax.media.opengl.fixedfunc.GLPointerFuncUtil;
+
+import jogamp.opengl.Debug;
+
 import com.jogamp.common.nio.Buffers;
-import javax.media.opengl.*;
-import javax.media.opengl.fixedfunc.*;
-import com.jogamp.opengl.util.*;
-import com.jogamp.opengl.util.glsl.*;
-import java.nio.*;
+import com.jogamp.common.util.IntIntHashMap;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.ShaderCode;
+import com.jogamp.opengl.util.glsl.ShaderProgram;
+import com.jogamp.opengl.util.glsl.ShaderState;
+import com.jogamp.opengl.util.glsl.fixedfunc.ShaderSelectionMode;
 
+/**
+ *
+ * <p>
+ * Note: Certain GL FFP state values (e.g.: alphaTestFunc and cullFace)
+ *       are mapped to a lower number range so they can be stored in low precision storage,
+ *       i.e. in a 'lowp int' (GL ES2).
+ * </p>
+ */
 public class FixedFuncPipeline {
+    protected static final boolean DEBUG;
+
+    static {
+        Debug.initSingleton();
+        DEBUG = Debug.isPropertyDefined("jogl.debug.FixedFuncPipeline", true);
+    }
+
+    /** The maximum texture units which could be used, depending on {@link ShaderSelectionMode}. */
     public static final int MAX_TEXTURE_UNITS = 8;
     public static final int MAX_LIGHTS        = 8;
 
-    public FixedFuncPipeline(GL2ES2 gl, PMVMatrix pmvMatrix) {
-        init(gl, pmvMatrix, FixedFuncPipeline.class, shaderSrcRootDef, shaderBinRootDef, 
-             vertexColorFileDef, vertexColorLightFileDef, fragmentColorFileDef, fragmentColorTextureFileDef);
+    public FixedFuncPipeline(GL2ES2 gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix) {
+        shaderRootClass = FixedFuncPipeline.class;
+        shaderSrcRoot = shaderSrcRootDef;
+        shaderBinRoot = shaderBinRootDef;
+        vertexColorFile = vertexColorFileDef;
+        vertexColorLightFile = vertexColorLightFileDef;
+        fragmentColorFile = fragmentColorFileDef;
+        fragmentColorTextureFile = fragmentColorTextureFileDef;
+        init(gl, mode, pmvMatrix);
     }
-    public FixedFuncPipeline(GL2ES2 gl, PMVMatrix pmvMatrix, Class shaderRootClass, String shaderSrcRoot, String shaderBinRoot, 
-                       String vertexColorFile,
-                       String vertexColorLightFile,
-                       String fragmentColorFile,
-                       String fragmentColorTextureFile) {
-        init(gl, pmvMatrix, shaderRootClass, shaderSrcRoot, shaderBinRoot, 
-             vertexColorFile, vertexColorLightFile, fragmentColorFile, fragmentColorTextureFile);
+    public FixedFuncPipeline(GL2ES2 gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix,
+                             Class<?> shaderRootClass, String shaderSrcRoot,
+                             String shaderBinRoot,
+                             String vertexColorFile, String vertexColorLightFile,
+                             String fragmentColorFile, String fragmentColorTextureFile) {
+        this.shaderRootClass = shaderRootClass;
+        this.shaderSrcRoot = shaderSrcRoot;
+        this.shaderBinRoot = shaderBinRoot;
+        this.vertexColorFile = vertexColorFile;
+        this.vertexColorLightFile = vertexColorLightFile;
+        this.fragmentColorFile = fragmentColorFile;
+        this.fragmentColorTextureFile = fragmentColorTextureFile;
+        init(gl, mode, pmvMatrix);
     }
 
+    public ShaderSelectionMode getShaderSelectionMode() { return requestedShaderSelectionMode; }
+    public void setShaderSelectionMode(ShaderSelectionMode mode) { requestedShaderSelectionMode=mode; }
+    public ShaderSelectionMode getCurrentShaderSelectionMode() { return currentShaderSelectionMode; }
+
     public boolean verbose() { return verbose; }
 
-    public void setVerbose(boolean v) { verbose=v; }
+    public void setVerbose(boolean v) { verbose = DEBUG || v; }
 
     public boolean isValid() {
         return shaderState.linked();
@@ -69,46 +123,83 @@ public class FixedFuncPipeline {
         return activeTextureUnit;
     }
 
-    public String getArrayIndexName(int glArrayIndex) {
-      String name = GLPointerFuncUtil.getPredefinedArrayIndexName(glArrayIndex); 
-      switch(glArrayIndex) {
-          case GLPointerFunc.GL_VERTEX_ARRAY:
-          case GLPointerFunc.GL_NORMAL_ARRAY:
-          case GLPointerFunc.GL_COLOR_ARRAY:
-              break;
-          case GLPointerFunc.GL_TEXTURE_COORD_ARRAY:
-              name = name + activeTextureUnit;
-      }
-      return name;
-    }
-
     public void destroy(GL2ES2 gl) {
-        shaderProgramColor.release(gl, true);
-        shaderProgramColorLight.release(gl, true);
-        shaderProgramColorTexture.release(gl, true);
-        shaderProgramColorTextureLight.release(gl, true);
+        if(null != shaderProgramColor) {
+            shaderProgramColor.release(gl, true);
+        }
+        if(null != shaderProgramColorLight) {
+            shaderProgramColorLight.release(gl, true);
+        }
+        if(null != shaderProgramColorTexture2) {
+            shaderProgramColorTexture2.release(gl, true);
+        }
+        if(null != shaderProgramColorTexture4) {
+            shaderProgramColorTexture4.release(gl, true);
+        }
+        if(null != shaderProgramColorTexture4) {
+            shaderProgramColorTexture4.release(gl, true);
+        }
+        if(null != shaderProgramColorTexture8Light) {
+            shaderProgramColorTexture8Light.release(gl, true);
+        }
         shaderState.destroy(gl);
     }
 
-    public void glEnableClientState(GL2ES2 gl, int glArrayIndex) {
-        shaderState.useProgram(gl, true);
+    //
+    // Simple Globals
+    //
+    public void glColor4f(GL2ES2 gl, float red, float green, float blue, float alpha) {
+        colorStatic.put(0, red);
+        colorStatic.put(1, green);
+        colorStatic.put(2, blue);
+        colorStatic.put(3, alpha);
 
-        shaderState.enableVertexAttribArray(gl, getArrayIndexName(glArrayIndex));
-        // textureCoordsEnabled |=  (1 << activeTextureUnit);
-        if ( textureCoordsEnabled.get(activeTextureUnit) != 1 ) {
-            textureCoordsEnabled.put(activeTextureUnit, 1);
-            textureCoordsEnabledDirty = true;
+        shaderState.useProgram(gl, true);
+        final GLUniformData ud = shaderState.getUniform(mgl_ColorStatic);
+        if(null!=ud) {
+            // same data object ..
+            shaderState.uniform(gl, ud);
+        } else {
+            throw new GLException("Failed to update: mgl_ColorStatic");
         }
     }
 
+    //
+    // Arrays / States
+    //
+
+    public void glEnableClientState(GL2ES2 gl, int glArrayIndex) {
+        glToggleClientState(gl, glArrayIndex, true);
+    }
+
     public void glDisableClientState(GL2ES2 gl, int glArrayIndex) {
-        shaderState.useProgram(gl, true);
+        glToggleClientState(gl, glArrayIndex, false);
+    }
 
-        shaderState.disableVertexAttribArray(gl, getArrayIndexName(glArrayIndex));
-        // textureCoordsEnabled &= ~(1 << activeTextureUnit);
-        if ( textureCoordsEnabled.get(activeTextureUnit) != 0 ) {
-            textureCoordsEnabled.put(activeTextureUnit, 0);
-            textureCoordsEnabledDirty = true;
+    private void glToggleClientState(GL2ES2 gl, int glArrayIndex, boolean enable) {
+        final String arrayName = GLPointerFuncUtil.getPredefinedArrayIndexName(glArrayIndex, clientActiveTextureUnit);
+        if(null == arrayName) {
+            throw new GLException("arrayIndex "+toHexString(glArrayIndex)+" unknown");
+        }
+        shaderState.useProgram(gl, true);
+        if(enable) {
+            shaderState.enableVertexAttribArray(gl, arrayName );
+        } else {
+            shaderState.disableVertexAttribArray(gl, arrayName );
+        }
+        switch( glArrayIndex ) {
+            case GLPointerFunc.GL_TEXTURE_COORD_ARRAY:
+                final int enableV = enable ? 1 : 0;
+                // enable-bitwise:  textureCoordsEnabled |=  (1 << clientActiveTextureUnit);
+                // disable-bitwise: textureCoordsEnabled &= ~(1 << clientActiveTextureUnit);
+                if ( textureCoordEnabled.get(clientActiveTextureUnit) != enableV) {
+                    textureCoordEnabled.put(clientActiveTextureUnit, enableV);
+                    textureCoordEnabledDirty = true;
+                }
+                break;
+            case GLPointerFunc.GL_COLOR_ARRAY:
+                colorVAEnabledDirty = true;
+                break;
         }
     }
 
@@ -122,26 +213,235 @@ public class FixedFuncPipeline {
         shaderState.vertexAttribPointer(gl, data);
     }
 
-    public void glColor4fv(GL2ES2 gl, FloatBuffer data ) {
+    public void glNormalPointer(GL2ES2 gl, GLArrayData data) {
         shaderState.useProgram(gl, true);
-        GLUniformData ud = shaderState.getUniform(mgl_ColorStatic);
-        if(null!=ud) {
-            ud.setData(data);
-            shaderState.uniform(gl, ud);
+        shaderState.vertexAttribPointer(gl, data);
+    }
+
+    //
+    // MULTI-TEXTURE
+    //
+
+    /** Enables/Disables the named texture unit (if changed), returns previous state */
+    private boolean glEnableTexture(boolean enable, int unit) {
+        final boolean isEnabled = 0 != ( textureEnabledBits & ( 1 << activeTextureUnit ) );
+        if( isEnabled != enable ) {
+            if(enable) {
+                textureEnabledBits |=  ( 1 << unit );
+                textureEnabled.put(unit, 1);
+            } else {
+                textureEnabledBits &= ~( 1 << unit );
+                textureEnabled.put(unit, 0);
+            }
+            textureEnabledDirty=true;
         }
+        return isEnabled;
     }
 
-    public void glNormalPointer(GL2ES2 gl, GLArrayData data) {
-        shaderState.useProgram(gl, true);
-        shaderState.vertexAttribPointer(gl, data);
+    public void glClientActiveTexture(int textureUnit) {
+        textureUnit -= GL.GL_TEXTURE0;
+        if(0 <= textureUnit && textureUnit<MAX_TEXTURE_UNITS) {
+            clientActiveTextureUnit = textureUnit;
+        } else {
+            throw new GLException("glClientActiveTexture textureUnit not within GL_TEXTURE0 + [0.."+MAX_TEXTURE_UNITS+"]: "+textureUnit);
+        }
+    }
+
+    public void glActiveTexture(int textureUnit) {
+        textureUnit -= GL.GL_TEXTURE0;
+        if(0 <= textureUnit && textureUnit<MAX_TEXTURE_UNITS) {
+            activeTextureUnit = textureUnit;
+        } else {
+            throw new GLException("glActivateTexture textureUnit not within GL_TEXTURE0 + [0.."+MAX_TEXTURE_UNITS+"]: "+textureUnit);
+        }
     }
 
     public void glTexCoordPointer(GL2ES2 gl, GLArrayData data) {
+        if( GLPointerFunc.GL_TEXTURE_COORD_ARRAY != data.getIndex() ) {
+            throw new GLException("Invalid GLArrayData Index "+toHexString(data.getIndex())+", "+data);
+        }
         shaderState.useProgram(gl, true);
-        data.setName( getArrayIndexName(data.getIndex()) );
+        data.setName( GLPointerFuncUtil.getPredefinedArrayIndexName(data.getIndex(), clientActiveTextureUnit) ) ;
         shaderState.vertexAttribPointer(gl, data);
     }
 
+    public void glBindTexture(int target, int texture) {
+        if(GL.GL_TEXTURE_2D == target) {
+            if( texture != boundTextureObject[activeTextureUnit] ) {
+                boundTextureObject[activeTextureUnit] = texture;
+                textureFormatDirty = true;
+            }
+        } else {
+            System.err.println("FixedFuncPipeline: Unimplemented glBindTexture for target "+toHexString(target)+". Texture name "+toHexString(texture));
+        }
+    }
+
+    public void glTexImage2D(int target, /* int level, */ int internalformat, /*, int width, int height, int border, */
+                             int format /*, int type,  Buffer pixels */) {
+        final int ifmt;
+        if(GL.GL_TEXTURE_2D == target) {
+            switch(internalformat) {
+            case 3:
+            case GL.GL_RGB:
+            case GL.GL_RGB565:
+            case GL.GL_RGB8:
+            case GL.GL_RGB10:
+                ifmt = 3;
+                break;
+            case 4:
+            case GL.GL_RGBA:
+            case GL.GL_RGB5_A1:
+            case GL.GL_RGBA4:
+            case GL.GL_RGBA8:
+            case GL.GL_RGB10_A2:
+                ifmt = 4;
+                break;
+            default:
+                System.err.println("FixedFuncPipeline: glTexImage2D TEXTURE_2D: Unimplemented internalformat "+toHexString(internalformat));
+                ifmt = 4;
+                break;
+            }
+            if( ifmt != texID2Format.put(boundTextureObject[activeTextureUnit], ifmt) ) {
+                textureFormatDirty = true;
+                // System.err.println("glTexImage2D TEXTURE_2D: internalformat ifmt "+toHexString(internalformat)+" fmt "+toHexString(format)+" -> "+toHexString(ifmt));
+            }
+        } else {
+            System.err.println("FixedFuncPipeline: Unimplemented glTexImage2D: target "+toHexString(target)+", internalformat "+toHexString(internalformat));
+        }
+    }
+    /*
+    public void glTexImage2D(int target, int level, int internalformat, int width, int height, int border,
+                             int format, int type,  long pixels_buffer_offset) {
+        textureFormat.put(activeTextureUnit, internalformat);
+        textureFormatDirty = true;
+    }*/
+
+    public void glTexEnvi(int target, int pname, int value) {
+        if(GL2ES1.GL_TEXTURE_ENV == target && GL2ES1.GL_TEXTURE_ENV_MODE == pname) {
+            final int mode;
+            switch( value ) {
+                case GL2ES1.GL_ADD:
+                    mode = 1;
+                    break;
+                case GL2ES1.GL_MODULATE:
+                    mode = 2;
+                    break;
+                case GL2ES1.GL_DECAL:
+                    mode = 3;
+                    break;
+                case GL2ES1.GL_BLEND:
+                    mode = 4;
+                    break;
+                case GL2ES1.GL_REPLACE:
+                    mode = 5;
+                    break;
+                case GL2ES1.GL_COMBINE:
+                    mode = 2; // FIXME
+                    System.err.println("FixedFuncPipeline: glTexEnv GL_TEXTURE_ENV_MODE: unimplemented mode: "+toHexString(value));
+                    break;
+                default:
+                    throw new GLException("glTexEnv GL_TEXTURE_ENV_MODE: invalid mode: "+toHexString(value));
+            }
+            setTextureEnvMode(mode);
+        } else if(verbose) {
+            System.err.println("FixedFuncPipeline: Unimplemented TexEnv: target "+toHexString(target)+", pname "+toHexString(pname)+", mode: "+toHexString(value));
+        }
+    }
+    private void setTextureEnvMode(int value) {
+        if( value != textureEnvMode.get(activeTextureUnit) ) {
+            textureEnvMode.put(activeTextureUnit, value);
+            textureEnvModeDirty = true;
+        }
+    }
+    public void glGetTexEnviv(int target, int pname,  IntBuffer params) { // FIXME
+        System.err.println("FixedFuncPipeline: Unimplemented glGetTexEnviv: target "+toHexString(target)+", pname "+toHexString(pname));
+    }
+    public void glGetTexEnviv(int target, int pname,  int[] params, int params_offset) { // FIXME
+        System.err.println("FixedFuncPipeline: Unimplemented glGetTexEnviv: target "+toHexString(target)+", pname "+toHexString(pname));
+    }
+
+    //
+    // Point Sprites
+    //
+    public void glPointSize(float size) {
+        pointParams.put(0, size);
+        pointParamsDirty = true;
+    }
+    public  void glPointParameterf(int pname, float param) {
+        switch(pname) {
+            case GL2ES1.GL_POINT_SIZE_MIN:
+                pointParams.put(2, param);
+                break;
+            case GL2ES1.GL_POINT_SIZE_MAX:
+                pointParams.put(3, param);
+                break;
+            case GL2ES2.GL_POINT_FADE_THRESHOLD_SIZE:
+                pointParams.put(4+3, param);
+                break;
+        }
+        pointParamsDirty = true;
+    }
+    public  void glPointParameterfv(int pname, float[] params, int params_offset) {
+        switch(pname) {
+            case GL2ES1.GL_POINT_DISTANCE_ATTENUATION:
+                pointParams.put(4+0, params[params_offset + 0]);
+                pointParams.put(4+1, params[params_offset + 1]);
+                pointParams.put(4+2, params[params_offset + 2]);
+                break;
+        }
+        pointParamsDirty = true;
+    }
+    public  void glPointParameterfv(int pname, java.nio.FloatBuffer params) {
+        final int o = params.position();
+        switch(pname) {
+            case GL2ES1.GL_POINT_DISTANCE_ATTENUATION:
+                pointParams.put(4+0, params.get(o + 0));
+                pointParams.put(4+1, params.get(o + 1));
+                pointParams.put(4+2, params.get(o + 2));
+                break;
+        }
+        pointParamsDirty = true;
+    }
+
+    // private int[] pointTexObj = new int[] { 0 };
+
+    private void glDrawPoints(GL2ES2 gl, GLRunnable2<Object,Object> glDrawAction, Object args) {
+        if(gl.isGL2GL3()) {
+            gl.glEnable(GL2GL3.GL_VERTEX_PROGRAM_POINT_SIZE);
+        }
+        if(gl.isGL2ES1()) {
+            gl.glEnable(GL2ES1.GL_POINT_SPRITE);
+        }
+        loadShaderPoints(gl);
+        shaderState.attachShaderProgram(gl, shaderProgramPoints, true);
+        validate(gl, false); // sync uniforms
+
+        glDrawAction.run(gl, args);
+
+        if(gl.isGL2ES1()) {
+            gl.glDisable(GL2ES1.GL_POINT_SPRITE);
+        }
+        if(gl.isGL2GL3()) {
+            gl.glDisable(GL2GL3.GL_VERTEX_PROGRAM_POINT_SIZE);
+        }
+        shaderState.attachShaderProgram(gl, selectShaderProgram(gl, currentShaderSelectionMode), true);
+    }
+    private static final GLRunnable2<Object, Object> glDrawArraysAction = new GLRunnable2<Object,Object>() {
+        @Override
+        public Object run(GL gl, Object args) {
+            int[] _args = (int[])args;
+            gl.glDrawArrays(GL.GL_POINTS, _args[0], _args[1]);
+            return null;
+        }
+    };
+    private final void glDrawPointArrays(GL2ES2 gl, int first, int count) {
+        glDrawPoints(gl, glDrawArraysAction, new int[] { first, count });
+    }
+
+    //
+    // Lighting
+    //
+
     public void glLightfv(GL2ES2 gl, int light, int pname, java.nio.FloatBuffer params) {
         shaderState.useProgram(gl, true);
         light -=GLLightingFunc.GL_LIGHT0;
@@ -179,17 +479,14 @@ public class FixedFuncPipeline {
                     ud = shaderState.getUniform(mgl_LightSource+"["+light+"].quadraticAttenuation");
                     break;
                 default:
-                    if(verbose) {
-                        System.err.println("glLightfv pname not within [GL_AMBIENT GL_DIFFUSE GL_SPECULAR GL_POSITION GL_SPOT_DIRECTION]: "+pname);
-                    }
-                    return;
+                    throw new GLException("glLightfv invalid pname: "+toHexString(pname));
             }
             if(null!=ud) {
                 ud.setData(params);
                 shaderState.uniform(gl, ud);
             }
-        } else if(verbose) {
-            System.err.println("glLightfv light not within [0.."+MAX_LIGHTS+"]: "+light);
+        } else {
+            throw new GLException("glLightfv light not within [0.."+MAX_LIGHTS+"]: "+light);
         }
     }
 
@@ -201,10 +498,8 @@ public class FixedFuncPipeline {
             case GL.GL_FRONT_AND_BACK:
                 break;
             case GL.GL_BACK:
-                if(verbose) {
-                    System.err.println("glMaterialfv face GL_BACK currently not supported");
-                }
-                break;
+                System.err.println("FixedFuncPipeline: Unimplemented glMaterialfv GL_BACK face");
+                return;
             default:
         }
 
@@ -214,7 +509,13 @@ public class FixedFuncPipeline {
                 ud = shaderState.getUniform(mgl_FrontMaterial+".ambient");
                 break;
             case  GLLightingFunc.GL_AMBIENT_AND_DIFFUSE:
-                glMaterialfv(gl, face, GLLightingFunc.GL_AMBIENT, params);
+                {
+                    ud = shaderState.getUniform(mgl_FrontMaterial+".ambient");
+                    if(null!=ud) {
+                        ud.setData(params);
+                        shaderState.uniform(gl, ud);
+                    }
+                }
                 // fall through intended ..
             case  GLLightingFunc.GL_DIFFUSE:
                 ud = shaderState.getUniform(mgl_FrontMaterial+".diffuse");
@@ -229,17 +530,20 @@ public class FixedFuncPipeline {
                 ud = shaderState.getUniform(mgl_FrontMaterial+".shininess");
                 break;
             default:
-                if(verbose) {
-                    System.err.println("glMaterialfv pname not within [GL_AMBIENT GL_DIFFUSE GL_SPECULAR GL_EMISSION GL_SHININESS]: "+pname);
-                }
-                return;
+                throw new GLException("glMaterialfv invalid pname: "+toHexString(pname));
         }
         if(null!=ud) {
             ud.setData(params);
             shaderState.uniform(gl, ud);
+        } else if(verbose) {
+
         }
     }
 
+    //
+    // Misc States
+    //
+
     public void glShadeModel(GL2ES2 gl, int mode) {
         shaderState.useProgram(gl, true);
         GLUniformData ud = shaderState.getUniform(mgl_ShadeModel);
@@ -249,46 +553,135 @@ public class FixedFuncPipeline {
         }
     }
 
-    public void glActiveTexture(GL2ES2 gl, int textureUnit) {
-        textureUnit -= GL.GL_TEXTURE0;
-        if(0 <= textureUnit && textureUnit<MAX_TEXTURE_UNITS) {
-            shaderState.useProgram(gl, true);
-            GLUniformData ud;
-            ud = shaderState.getUniform(mgl_ActiveTexture);
-            if(null!=ud) {
-                ud.setData(textureUnit);
-                shaderState.uniform(gl, ud);
+    /** ES2 supports CullFace implicit
+    public void glCullFace(int faceName) {
+        int _cullFace;
+        switch(faceName) {
+            case GL.GL_FRONT:
+                _cullFace = 1;
+                break;
+            case GL.GL_BACK:
+                _cullFace = 2;
+                break;
+            case GL.GL_FRONT_AND_BACK:
+                _cullFace = 3;
+                break;
+            default:
+                throw new GLException("glCullFace invalid faceName: "+toHexString(faceName));
+        }
+        if(0 < _cullFace) {
+            if(0>cullFace) {
+                _cullFace *= -1;
             }
-            ud = shaderState.getUniform(mgl_ActiveTextureIdx);
-            if(null!=ud) {
-                ud.setData(textureUnit);
-                shaderState.uniform(gl, ud);
+            if(cullFace != _cullFace) {
+                cullFace = _cullFace;
+                cullFaceDirty=true;
+            }
+        }
+    } */
+
+    public  void glAlphaFunc(int func, float ref) {
+        int _func;
+        switch(func) {
+            case GL.GL_NEVER:
+                _func = 1;
+                break;
+            case GL.GL_LESS:
+                _func = 2;
+                break;
+            case GL.GL_EQUAL:
+                _func = 3;
+                break;
+            case GL.GL_LEQUAL:
+                _func = 4;
+                break;
+            case GL.GL_GREATER:
+                _func = 5;
+                break;
+            case GL.GL_NOTEQUAL:
+                _func = 6;
+                break;
+            case GL.GL_GEQUAL:
+                _func = 7;
+                break;
+            case GL.GL_ALWAYS:
+                _func = 8;
+                break;
+            default:
+                throw new GLException("glAlphaFunc invalid func: "+toHexString(func));
+        }
+        if(0 < _func) {
+            if(0>alphaTestFunc) {
+                _func *= -1;
+            }
+            if( alphaTestFunc != _func || alphaTestRef != ref ) {
+                alphaTestFunc = _func;
+                alphaTestRef = ref;
+                alphaTestDirty=true;
             }
-            activeTextureUnit = textureUnit;
-        } else {
-            throw new GLException("glActivateTexture textureUnit not within GL_TEXTURE0 + [0.."+MAX_TEXTURE_UNITS+"]: "+textureUnit);
         }
     }
 
     /**
-     * @return false if digested in regard to GL2ES2 spec, 
+     * @return false if digested in regard to GL2ES2 spec,
      *         eg this call must not be passed to an underlying ES2 implementation.
      *         true if this call shall be passed to an underlying GL2ES2/ES2 implementation as well.
      */
-    public boolean glEnable(GL2ES2 gl, int cap, boolean enable) {
+    public boolean glEnable(int cap, boolean enable) {
         switch(cap) {
-            case GL.GL_TEXTURE_2D:
-                textureEnabled=enable;
+            case GL.GL_BLEND:
+            case GL.GL_DEPTH_TEST:
+            case GL.GL_DITHER:
+            case GL.GL_POLYGON_OFFSET_FILL:
+            case GL.GL_SAMPLE_ALPHA_TO_COVERAGE:
+            case GL.GL_SAMPLE_COVERAGE:
+            case GL.GL_SCISSOR_TEST:
+            case GL.GL_STENCIL_TEST:
+                return true;
+
+            case GL.GL_CULL_FACE:
+                /** ES2 supports CullFace implicit
+                final int _cullFace;
+                if(0>cullFace && enable || 0<cullFace && !enable) {
+                    _cullFace = cullFace * -1;
+                } else {
+                    _cullFace = cullFace;
+                }
+                if(_cullFace != cullFace) {
+                    cullFaceDirty=true;
+                    cullFace=_cullFace;
+                } */
                 return true;
+
+            case GL.GL_TEXTURE_2D:
+                glEnableTexture(enable, activeTextureUnit);
+                return false;
+
             case GLLightingFunc.GL_LIGHTING:
                 lightingEnabled=enable;
                 return false;
-            case GL.GL_CULL_FACE:
-                cullFace=Math.abs(cullFace);
-                if(!enable) {
-                    cullFace*=-1;
+
+            case GL2ES1.GL_ALPHA_TEST:
+                final int _alphaTestFunc;
+                if(0>alphaTestFunc && enable || 0<alphaTestFunc && !enable) {
+                    _alphaTestFunc = alphaTestFunc * -1;
+                } else {
+                    _alphaTestFunc = alphaTestFunc;
                 }
-                return true;
+                if(_alphaTestFunc != alphaTestFunc) {
+                    alphaTestDirty=true;
+                    alphaTestFunc=_alphaTestFunc;
+                }
+                return false;
+
+            case GL2ES1.GL_POINT_SMOOTH:
+                pointParams.put(1, enable ? 1.0f : 0.0f);
+                pointParamsDirty = true;
+                return false;
+
+            case GL2ES1.GL_POINT_SPRITE:
+                // gl_PointCoord always enabled
+                return false;
         }
 
         int light = cap - GLLightingFunc.GL_LIGHT0;
@@ -299,157 +692,422 @@ public class FixedFuncPipeline {
                 return false;
             }
         }
-        return true; // pass it on ..
+        System.err.println("FixedFunctionPipeline: "+(enable ? "glEnable" : "glDisable")+" "+toHexString(cap)+" not handled in emulation and not supported in ES2");
+        return false; // ignore!
     }
 
-    public void glCullFace(GL2ES2 gl, int faceName) {
-        switch(faceName) {
-            case GL.GL_FRONT:
-                faceName = 1; break;
-            case GL.GL_BACK:
-                faceName = 2; break;
-            case GL.GL_FRONT_AND_BACK:
-                faceName = 3; break;
+    //
+    // Draw
+    //
+
+    public void glDrawArrays(GL2ES2 gl, int mode, int first, int count) {
+        switch(mode) {
+            case GL2.GL_QUAD_STRIP:
+                mode=GL.GL_TRIANGLE_STRIP;
+                break;
+            case GL2.GL_POLYGON:
+                mode=GL.GL_TRIANGLE_FAN;
+                break;
+            case GL2ES1.GL_POINTS:
+                glDrawPointArrays(gl, first, count);
+                return;
         }
-        if(0>cullFace) {
-            faceName *= -1;
+        validate(gl, true);
+        if ( GL2.GL_QUADS == mode && !gl.isGL2() ) {
+            for (int j = first; j < count - 3; j += 4) {
+                gl.glDrawArrays(GL.GL_TRIANGLE_FAN, j, 4);
+            }
+        } else {
+            gl.glDrawArrays(mode, first, count);
         }
-        cullFace = faceName;
     }
+    public void glDrawElements(GL2ES2 gl, int mode, int count, int type, java.nio.Buffer indices) {
+        validate(gl, true);
+        if ( GL2.GL_QUADS == mode && !gl.isGL2() ) {
+            final int idx0 = indices.position();
+
+            if( GL.GL_UNSIGNED_BYTE == type ) {
+                final ByteBuffer b = (ByteBuffer) indices;
+                for (int j = 0; j < count; j++) {
+                    gl.glDrawArrays(GL.GL_TRIANGLE_FAN, (int)(0x000000ff & b.get(idx0+j)), 4);
+                }
+            } else if( GL.GL_UNSIGNED_SHORT == type ){
+                final ShortBuffer b = (ShortBuffer) indices;
+                for (int j = 0; j < count; j++) {
+                    gl.glDrawArrays(GL.GL_TRIANGLE_FAN, (int)(0x0000ffff & b.get(idx0+j)), 4);
+                }
+            } else {
+                final IntBuffer b = (IntBuffer) indices;
+                for (int j = 0; j < count; j++) {
+                    gl.glDrawArrays(GL.GL_TRIANGLE_FAN, (int)(0xffffffff & b.get(idx0+j)), 4);
+                }
+            }
+        } else {
+            // FIXME: Impl. VBO usage .. or unroll (see above)!
+            if( !gl.getContext().isCPUDataSourcingAvail() ) {
+                throw new GLException("CPU data sourcing n/a w/ "+gl.getContext());
+            }
+            if( GL2ES1.GL_POINTS != mode ) {
+                ((GLES2)gl).glDrawElements(mode, count, type, indices);
+            } else {
+                // FIXME GL_POINTS !
+                ((GLES2)gl).glDrawElements(mode, count, type, indices);
+            }
+        }
+    }
+    public void glDrawElements(GL2ES2 gl, int mode, int count, int type, long indices_buffer_offset) {
+        validate(gl, true);
+        if ( GL2.GL_QUADS == mode && !gl.isGL2() ) {
+            throw new GLException("Cannot handle indexed QUADS on !GL2 w/ VBO due to lack of CPU index access");
+        } else if( GL2ES1.GL_POINTS != mode ) {
+            // FIXME GL_POINTS !
+            gl.glDrawElements(mode, count, type, indices_buffer_offset);
+        } else {
+            gl.glDrawElements(mode, count, type, indices_buffer_offset);
+        }
+    }
+
+    private final int textureEnabledCount() {
+        int n=0;
+        for(int i=MAX_TEXTURE_UNITS-1; i>=0; i--) {
+            if( 0 != textureEnabled.get(i) ) {
+                n++;
+            }
+        }
+        return n;
+    }
+
+    public void validate(GL2ES2 gl, boolean selectShader) {
+        if( selectShader ) {
+            if( ShaderSelectionMode.AUTO == requestedShaderSelectionMode) {
+                final ShaderSelectionMode newMode;
+
+                // pre-validate shader switch
+                if( 0 != textureEnabledBits ) {
+                    if(lightingEnabled) {
+                        newMode = ShaderSelectionMode.COLOR_TEXTURE8_LIGHT_PER_VERTEX;
+                    } else {
+                        final int n = textureEnabledCount();
+                        if( 4 < n ) {
+                            newMode = ShaderSelectionMode.COLOR_TEXTURE8;
+                        } else if ( 2 < n ) {
+                            newMode = ShaderSelectionMode.COLOR_TEXTURE4;
+                        } else {
+                            newMode = ShaderSelectionMode.COLOR_TEXTURE2;
+                        }
+                    }
+                } else {
+                    if(lightingEnabled) {
+                        newMode = ShaderSelectionMode.COLOR_LIGHT_PER_VERTEX;
+                    } else {
+                        newMode = ShaderSelectionMode.COLOR;
+                    }
+                }
+                shaderState.attachShaderProgram(gl, selectShaderProgram(gl, newMode), true); // enables shader-program implicit
+            } else {
+                shaderState.useProgram(gl, true);
+            }
+        }
 
-    public void validate(GL2ES2 gl) {
-        shaderState.useProgram(gl, true);
         GLUniformData ud;
-        if(pmvMatrix.update()) {
+        if( pmvMatrix.update() ) {
             ud = shaderState.getUniform(mgl_PMVMatrix);
             if(null!=ud) {
+                final FloatBuffer m;
+                if(ShaderSelectionMode.COLOR_TEXTURE8_LIGHT_PER_VERTEX == currentShaderSelectionMode ||
+                   ShaderSelectionMode.COLOR_LIGHT_PER_VERTEX== currentShaderSelectionMode ) {
+                    m = pmvMatrix.glGetPMvMvitMatrixf();
+                } else {
+                    m = pmvMatrix.glGetPMvMatrixf();
+                }
+                if(m != ud.getBuffer()) {
+                    ud.setData(m);
+                }
                 // same data object ..
                 shaderState.uniform(gl, ud);
             } else {
                 throw new GLException("Failed to update: mgl_PMVMatrix");
             }
         }
-        ud = shaderState.getUniform(mgl_ColorEnabled);
-        if(null!=ud) {
-            int ca = (shaderState.isVertexAttribArrayEnabled(GLPointerFuncUtil.mgl_Color)==true)?1:0;
-            if(ca!=ud.intValue()) {
-                ud.setData(ca);
-                shaderState.uniform(gl, ud);
+        if(colorVAEnabledDirty) {
+            ud = shaderState.getUniform(mgl_ColorEnabled);
+            if(null!=ud) {
+                int ca = true == shaderState.isVertexAttribArrayEnabled(GLPointerFuncUtil.mgl_Color) ? 1 : 0 ;
+                if(ca!=ud.intValue()) {
+                    ud.setData(ca);
+                    shaderState.uniform(gl, ud);
+                }
+            } else {
+                throw new GLException("Failed to update: mgl_ColorEnabled");
             }
+            colorVAEnabledDirty = false;
         }
-        ud = shaderState.getUniform(mgl_CullFace);
-        if(null!=ud) {
-            if(cullFace!=ud.intValue()) {
+        /** ES2 supports CullFace implicit
+        if(cullFaceDirty) {
+            ud = shaderState.getUniform(mgl_CullFace);
+            if(null!=ud) {
                 ud.setData(cullFace);
                 shaderState.uniform(gl, ud);
             }
+            cullFaceDirty = false;
+        } */
+
+        if(alphaTestDirty) {
+            ud = shaderState.getUniform(mgl_AlphaTestFunc);
+            if(null!=ud) {
+                ud.setData(alphaTestFunc);
+                shaderState.uniform(gl, ud);
+            }
+            ud = shaderState.getUniform(mgl_AlphaTestRef);
+            if(null!=ud) {
+                ud.setData(alphaTestRef);
+                shaderState.uniform(gl, ud);
+            }
+            alphaTestDirty = false;
+        }
+        if(pointParamsDirty) {
+            ud = shaderState.getUniform(mgl_PointParams);
+            if(null!=ud) {
+                // same data object
+                shaderState.uniform(gl, ud);
+            }
+            pointParamsDirty = false;
         }
 
         if(lightsEnabledDirty) {
             ud = shaderState.getUniform(mgl_LightsEnabled);
             if(null!=ud) {
-                // same data object 
+                // same data object
                 shaderState.uniform(gl, ud);
             }
             lightsEnabledDirty=false;
         }
 
-        if(textureCoordsEnabledDirty) {
+        if(textureCoordEnabledDirty) {
             ud = shaderState.getUniform(mgl_TexCoordEnabled);
             if(null!=ud) {
-                // same data object 
+                // same data object
                 shaderState.uniform(gl, ud);
             }
-            textureCoordsEnabledDirty=false;
+            textureCoordEnabledDirty=false;
         }
 
-        if(textureEnabled) {
-            if(lightingEnabled) {
-                shaderState.attachShaderProgram(gl, shaderProgramColorTextureLight, true);
-            } else {
-                shaderState.attachShaderProgram(gl, shaderProgramColorTexture, true);
+        if(textureEnvModeDirty) {
+            ud = shaderState.getUniform(mgl_TexEnvMode);
+            if(null!=ud) {
+                // same data object
+                shaderState.uniform(gl, ud);
             }
-        } else {
-            if(lightingEnabled) {
-                shaderState.attachShaderProgram(gl, shaderProgramColorLight, true);
-            } else {
-                shaderState.attachShaderProgram(gl, shaderProgramColor, true);
+            textureEnvModeDirty = false;
+        }
+
+        if(textureFormatDirty) {
+            for(int i = 0; i<MAX_TEXTURE_UNITS; i++) {
+                textureFormat.put(i, texID2Format.get(boundTextureObject[i]));
             }
+            ud = shaderState.getUniform(mgl_TexFormat);
+            if(null!=ud) {
+                // same data object
+                shaderState.uniform(gl, ud);
+            }
+            textureFormatDirty = false;
         }
-        if(DEBUG) {
-            System.err.println("validate: "+this);
+        if(textureEnabledDirty) {
+            ud = shaderState.getUniform(mgl_TextureEnabled);
+            if(null!=ud) {
+                // same data object
+                shaderState.uniform(gl, ud);
+            }
+            textureEnabledDirty=false;
+        }
+
+        if(verbose) {
+            System.err.println("validate: "+toString(null, DEBUG).toString());
         }
     }
 
-    public String toString() {
-        return "FixedFuncPipeline[pmv: "+pmvMatrix+
-               ", textureEnabled: "+textureEnabled+
-               ", textureCoordsEnabled: "+textureCoordsEnabled+
-               ", lightingEnabled: "+lightingEnabled+
-               ", lightsEnabled: "+lightsEnabled+
-               "\n\t, shaderProgramColor: "+shaderProgramColor+
-               "\n\t, shaderProgramColorTexture: "+shaderProgramColorTexture+
-               "\n\t, shaderProgramColorLight: "+shaderProgramColorLight+
-               "\n\t, shaderProgramColorTextureLight: "+shaderProgramColorTextureLight+
-               "\n\t, ShaderState: "+shaderState+
-               "]";
-    }
-
-    protected void init(GL2ES2 gl, PMVMatrix pmvMatrix, Class shaderRootClass, String shaderSrcRoot, String shaderBinRoot, 
-                       String vertexColorFile,
-                       String vertexColorLightFile,
-                       String fragmentColorFile,
-                       String fragmentColorTextureFile) 
-   {
-        if(null==pmvMatrix) {
-            throw new GLException("PMVMatrix is null");
+    public StringBuilder toString(StringBuilder sb, boolean alsoUnlocated) {
+        if(null == sb) {
+            sb = new StringBuilder();
         }
-        this.pmvMatrix=pmvMatrix;
-        this.shaderState=new ShaderState();
-        this.shaderState.setVerbose(verbose);
-        ShaderCode vertexColor, vertexColorLight, fragmentColor, fragmentColorTexture;
+        sb.append("FixedFuncPipeline[");
+        sb.append(", textureEnabled: "+toHexString(textureEnabledBits)+", "); Buffers.toString(sb, null, textureEnabled);
+        sb.append("\n\t, textureCoordEnabled: "); Buffers.toString(sb, null, textureCoordEnabled);
+        sb.append("\n\t lightingEnabled: "+lightingEnabled);
+        sb.append(", lightsEnabled: "); Buffers.toString(sb, null, lightsEnabled);
+        sb.append("\n\t, shaderProgramColor: "+shaderProgramColor);
+        sb.append("\n\t, shaderProgramColorTexture2: "+shaderProgramColorTexture2);
+        sb.append("\n\t, shaderProgramColorTexture4: "+shaderProgramColorTexture4);
+        sb.append("\n\t, shaderProgramColorTexture8: "+shaderProgramColorTexture8);
+        sb.append("\n\t, shaderProgramColorLight: "+shaderProgramColorLight);
+        sb.append("\n\t, shaderProgramColorTexture8Light: "+shaderProgramColorTexture8Light);
+        sb.append("\n\t, ShaderState: ");
+        shaderState.toString(sb, alsoUnlocated);
+        sb.append("]");
+        return sb;
+    }
+    @Override
+    public String toString() {
+        return toString(null, DEBUG).toString();
+    }
 
-        vertexColor = ShaderCode.create( gl, gl.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot,
-                                         shaderBinRoot, vertexColorFile, false);
+    private static final String constMaxTextures0 = "#define MAX_TEXTURE_UNITS 0\n";
+    private static final String constMaxTextures2 = "#define MAX_TEXTURE_UNITS 2\n";
+    private static final String constMaxTextures4 = "#define MAX_TEXTURE_UNITS 4\n";
+    private static final String constMaxTextures8 = "#define MAX_TEXTURE_UNITS 8\n";
 
-        vertexColorLight = ShaderCode.create( gl, gl.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot,
-                                           shaderBinRoot, vertexColorLightFile, false);
+    private final void customizeShader(GL2ES2 gl, ShaderCode vp, ShaderCode fp, String maxTextureDefine) {
+        int rsVpPos = vp.defaultShaderCustomization(gl, true, true);
+        int rsFpPos = fp.defaultShaderCustomization(gl, true, true);
+        vp.insertShaderSource(0, rsVpPos, maxTextureDefine);
+        fp.insertShaderSource(0, rsFpPos, maxTextureDefine);
+    }
 
-        fragmentColor = ShaderCode.create( gl, gl.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
-                                           shaderBinRoot, fragmentColorFile, false);
+    private final void loadShaderPoints(GL2ES2 gl) {
+        if( null != shaderProgramPoints ) {
+            return;
+        }
 
-        fragmentColorTexture = ShaderCode.create( gl, gl.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
-                                                  shaderBinRoot, fragmentColorTextureFile, false);
+        final ShaderCode vp = ShaderCode.create( gl, GL2ES2.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot,
+                                         shaderBinRoot, shaderPointFileDef, true);
+        final ShaderCode fp = ShaderCode.create( gl, GL2ES2.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
+                                           shaderBinRoot, shaderPointFileDef, true);
+        customizeShader(gl, vp, fp, constMaxTextures2);
+        shaderProgramPoints = new ShaderProgram();
+        shaderProgramPoints.add(vp);
+        shaderProgramPoints.add(fp);
+        if(!shaderProgramPoints.link(gl, System.err)) {
+            throw new GLException("Couldn't link VertexColor program: "+shaderProgramPoints);
+        }
+    }
 
-        shaderProgramColor = new ShaderProgram();
-        shaderProgramColor.add(vertexColor);
-        shaderProgramColor.add(fragmentColor);
-        if(!shaderProgramColor.link(gl, System.err)) {
-            throw new GLException("Couldn't link VertexColor program: "+shaderProgramColor);
+    private final void loadShader(GL2ES2 gl, ShaderSelectionMode mode) {
+        final boolean loadColor = ShaderSelectionMode.COLOR == mode;
+        final boolean loadColorTexture2 = ShaderSelectionMode.COLOR_TEXTURE2 == mode;
+        final boolean loadColorTexture4 = ShaderSelectionMode.COLOR_TEXTURE4 == mode;
+        final boolean loadColorTexture8 = ShaderSelectionMode.COLOR_TEXTURE8 == mode;
+        final boolean loadColorTexture = loadColorTexture2 || loadColorTexture4 || loadColorTexture8 ;
+        final boolean loadColorLightPerVertex = ShaderSelectionMode.COLOR_LIGHT_PER_VERTEX == mode;
+        final boolean loadColorTexture8LightPerVertex = ShaderSelectionMode.COLOR_TEXTURE8_LIGHT_PER_VERTEX == mode;
+
+        if( null != shaderProgramColor && loadColor ||
+            null != shaderProgramColorTexture2 && loadColorTexture2 ||
+            null != shaderProgramColorTexture4 && loadColorTexture4 ||
+            null != shaderProgramColorTexture8 && loadColorTexture8 ||
+            null != shaderProgramColorLight && loadColorLightPerVertex ||
+            null != shaderProgramColorTexture8Light && loadColorTexture8LightPerVertex ) {
+            return;
         }
 
-        shaderProgramColorTexture = new ShaderProgram();
-        shaderProgramColorTexture.add(vertexColor);
-        shaderProgramColorTexture.add(fragmentColorTexture);
-        if(!shaderProgramColorTexture.link(gl, System.err)) {
-            throw new GLException("Couldn't link VertexColorTexture program: "+shaderProgramColorTexture);
+        if( loadColor ) {
+            final ShaderCode vp = ShaderCode.create( gl, GL2ES2.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot,
+                                             shaderBinRoot, vertexColorFile, true);
+            final ShaderCode fp = ShaderCode.create( gl, GL2ES2.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
+                                               shaderBinRoot, fragmentColorFile, true);
+            customizeShader(gl, vp, fp, constMaxTextures0);
+            shaderProgramColor = new ShaderProgram();
+            shaderProgramColor.add(vp);
+            shaderProgramColor.add(fp);
+            if(!shaderProgramColor.link(gl, System.err)) {
+                throw new GLException("Couldn't link VertexColor program: "+shaderProgramColor);
+            }
+        } else  if( loadColorTexture ) {
+            final ShaderCode vp = ShaderCode.create( gl, GL2ES2.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot, shaderBinRoot, vertexColorFile, true);
+            final ShaderCode fp = ShaderCode.create( gl, GL2ES2.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
+                                                     shaderBinRoot, fragmentColorTextureFile, true);
+
+            if( loadColorTexture2 ) {
+                customizeShader(gl, vp, fp, constMaxTextures2);
+                shaderProgramColorTexture2 = new ShaderProgram();
+                shaderProgramColorTexture2.add(vp);
+                shaderProgramColorTexture2.add(fp);
+                if(!shaderProgramColorTexture2.link(gl, System.err)) {
+                    throw new GLException("Couldn't link VertexColorTexture2 program: "+shaderProgramColorTexture2);
+                }
+            } else if( loadColorTexture4 ) {
+                customizeShader(gl, vp, fp, constMaxTextures4);
+                shaderProgramColorTexture4 = new ShaderProgram();
+                shaderProgramColorTexture4.add(vp);
+                shaderProgramColorTexture4.add(fp);
+                if(!shaderProgramColorTexture4.link(gl, System.err)) {
+                    throw new GLException("Couldn't link VertexColorTexture4 program: "+shaderProgramColorTexture4);
+                }
+            } else if( loadColorTexture8 ) {
+                customizeShader(gl, vp, fp, constMaxTextures8);
+                shaderProgramColorTexture8 = new ShaderProgram();
+                shaderProgramColorTexture8.add(vp);
+                shaderProgramColorTexture8.add(fp);
+                if(!shaderProgramColorTexture8.link(gl, System.err)) {
+                    throw new GLException("Couldn't link VertexColorTexture8 program: "+shaderProgramColorTexture8);
+                }
+            }
+        } else if( loadColorLightPerVertex ) {
+            final ShaderCode vp = ShaderCode.create( gl, GL2ES2.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot,
+                                               shaderBinRoot, vertexColorLightFile, true);
+            final ShaderCode fp = ShaderCode.create( gl, GL2ES2.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
+                                               shaderBinRoot, fragmentColorFile, true);
+            customizeShader(gl, vp, fp, constMaxTextures0);
+            shaderProgramColorLight = new ShaderProgram();
+            shaderProgramColorLight.add(vp);
+            shaderProgramColorLight.add(fp);
+            if(!shaderProgramColorLight.link(gl, System.err)) {
+                throw new GLException("Couldn't link VertexColorLight program: "+shaderProgramColorLight);
+            }
+        }  else if( loadColorTexture8LightPerVertex ) {
+            final ShaderCode vp = ShaderCode.create( gl, GL2ES2.GL_VERTEX_SHADER, shaderRootClass, shaderSrcRoot,
+                                               shaderBinRoot, vertexColorLightFile, true);
+            final ShaderCode fp = ShaderCode.create( gl, GL2ES2.GL_FRAGMENT_SHADER, shaderRootClass, shaderSrcRoot,
+                                                     shaderBinRoot, fragmentColorTextureFile, true);
+            customizeShader(gl, vp, fp, constMaxTextures8);
+            shaderProgramColorTexture8Light = new ShaderProgram();
+            shaderProgramColorTexture8Light.add(vp);
+            shaderProgramColorTexture8Light.add(fp);
+            if(!shaderProgramColorTexture8Light.link(gl, System.err)) {
+                throw new GLException("Couldn't link VertexColorLight program: "+shaderProgramColorTexture8Light);
+            }
         }
+    }
 
-        shaderProgramColorLight = new ShaderProgram();
-        shaderProgramColorLight.add(vertexColorLight);
-        shaderProgramColorLight.add(fragmentColor);
-        if(!shaderProgramColorLight.link(gl, System.err)) {
-            throw new GLException("Couldn't link VertexColorLight program: "+shaderProgramColorLight);
+    private ShaderProgram selectShaderProgram(GL2ES2 gl, ShaderSelectionMode newMode) {
+        if(ShaderSelectionMode.AUTO == newMode) {
+            newMode = ShaderSelectionMode.COLOR;
         }
+        loadShader(gl, newMode);
+        final ShaderProgram sp;
+        switch(newMode) {
+            case COLOR_LIGHT_PER_VERTEX:
+                sp = shaderProgramColorLight;
+                break;
+            case COLOR_TEXTURE2:
+                sp = shaderProgramColorTexture2;
+                break;
+            case COLOR_TEXTURE4:
+                sp = shaderProgramColorTexture4;
+                break;
+            case COLOR_TEXTURE8:
+                sp = shaderProgramColorTexture8;
+                break;
+            case COLOR_TEXTURE8_LIGHT_PER_VERTEX:
+                sp = shaderProgramColorTexture8Light;
+                break;
+            case COLOR:
+            default:
+                sp = shaderProgramColor;
+        }
+        currentShaderSelectionMode = newMode;
+        return sp;
+    }
 
-        shaderProgramColorTextureLight = new ShaderProgram();
-        shaderProgramColorTextureLight.add(vertexColorLight);
-        shaderProgramColorTextureLight.add(fragmentColorTexture);
-        if(!shaderProgramColorTextureLight.link(gl, System.err)) {
-            throw new GLException("Couldn't link VertexColorLight program: "+shaderProgramColorTextureLight);
+    private void init(GL2ES2 gl, ShaderSelectionMode mode, PMVMatrix pmvMatrix) {
+        if(null==pmvMatrix) {
+            throw new GLException("PMVMatrix is null");
         }
+        this.pmvMatrix=pmvMatrix;
+        this.requestedShaderSelectionMode = mode;
+        this.shaderState=new ShaderState();
+        this.shaderState.setVerbose(verbose);
 
-        shaderState.attachShaderProgram(gl, shaderProgramColor, true);
+        shaderState.attachShaderProgram(gl, selectShaderProgram(gl, requestedShaderSelectionMode), true);
 
         // mandatory ..
         if(!shaderState.uniform(gl, new GLUniformData(mgl_PMVMatrix, 4, 4, pmvMatrix.glGetPMvMvitMatrixf()))) {
@@ -457,16 +1115,26 @@ public class FixedFuncPipeline {
         }
 
         shaderState.uniform(gl, new GLUniformData(mgl_ColorEnabled,  0));
-        shaderState.uniform(gl, new GLUniformData(mgl_ColorStatic, 4, zero4f));
-        shaderState.uniform(gl, new GLUniformData(mgl_TexCoordEnabled,  1, textureCoordsEnabled));
-        shaderState.uniform(gl, new GLUniformData(mgl_ActiveTexture, activeTextureUnit));
-        shaderState.uniform(gl, new GLUniformData(mgl_ActiveTextureIdx, activeTextureUnit));
+        shaderState.uniform(gl, new GLUniformData(mgl_ColorStatic, 4, colorStatic));
+
+        texID2Format.setKeyNotFoundValue(0);
+        shaderState.uniform(gl, new GLUniformData(mgl_TexCoordEnabled,  1, textureCoordEnabled));
+        shaderState.uniform(gl, new GLUniformData(mgl_TexEnvMode, 1, textureEnvMode));
+        shaderState.uniform(gl, new GLUniformData(mgl_TexFormat, 1, textureFormat));
+        shaderState.uniform(gl, new GLUniformData(mgl_TextureEnabled, 1, textureEnabled));
+        for(int i=0; i<MAX_TEXTURE_UNITS; i++) {
+            shaderState.uniform(gl, new GLUniformData(mgl_Texture+i, i));
+        }
         shaderState.uniform(gl, new GLUniformData(mgl_ShadeModel, 0));
-        shaderState.uniform(gl, new GLUniformData(mgl_CullFace, cullFace));
+        /** ES2 supports CullFace implicit
+        shaderState.uniform(gl, new GLUniformData(mgl_CullFace, cullFace)); */
+        shaderState.uniform(gl, new GLUniformData(mgl_AlphaTestFunc, alphaTestFunc));
+        shaderState.uniform(gl, new GLUniformData(mgl_AlphaTestRef, alphaTestRef));
+        shaderState.uniform(gl, new GLUniformData(mgl_PointParams, 4, pointParams));
         for(int i=0; i<MAX_LIGHTS; i++) {
             shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].ambient", 4, defAmbient));
-            shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].diffuse", 4, defDiffuse));
-            shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].specular", 4, defSpecular));
+            shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].diffuse", 4, 0==i ? one4f : defDiffuseN));
+            shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].specular", 4, 0==i ? one4f : defSpecularN));
             shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].position", 4, defPosition));
             shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].spotDirection", 3, defSpotDir));
             shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].spotExponent", defSpotExponent));
@@ -475,6 +1143,7 @@ public class FixedFuncPipeline {
             shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].linearAttenuation", defLinearAtten));
             shaderState.uniform(gl, new GLUniformData(mgl_LightSource+"["+i+"].quadraticAttenuation", defQuadraticAtten));
         }
+        shaderState.uniform(gl, new GLUniformData(mgl_LightModel+".ambient", 4, defLightModelAmbient));
         shaderState.uniform(gl, new GLUniformData(mgl_LightsEnabled,  1, lightsEnabled));
         shaderState.uniform(gl, new GLUniformData(mgl_FrontMaterial+".ambient", 4, defMatAmbient));
         shaderState.uniform(gl, new GLUniformData(mgl_FrontMaterial+".diffuse", 4, defMatDiffuse));
@@ -483,70 +1152,121 @@ public class FixedFuncPipeline {
         shaderState.uniform(gl, new GLUniformData(mgl_FrontMaterial+".shininess", defMatShininess));
 
         shaderState.useProgram(gl, false);
+        if(verbose) {
+            System.err.println("init: "+toString(null, DEBUG).toString());
+        }
     }
 
-    protected static final boolean DEBUG=false;
-    protected boolean verbose=false;
+    private String toHexString(int i) {
+        return "0x"+Integer.toHexString(i);
+    }
+
+    protected boolean verbose = DEBUG;
+
+    private final FloatBuffer colorStatic = Buffers.copyFloatBuffer(one4f);
+
+    private int activeTextureUnit=0;
+    private int clientActiveTextureUnit=0;
+    private final IntIntHashMap texID2Format = new IntIntHashMap();
+    private final int[] boundTextureObject = new int[] { 0, 0, 0, 0, 0, 0, 0, 0 }; // per unit
+    private int textureEnabledBits = 0;
+    private final IntBuffer textureEnabled = Buffers.newDirectIntBuffer(new int[] { 0, 0, 0, 0, 0, 0, 0, 0 }); // per unit
+    private boolean textureEnabledDirty = false;
+    private final IntBuffer textureCoordEnabled = Buffers.newDirectIntBuffer(new int[] { 0, 0, 0, 0, 0, 0, 0, 0 }); // per unit
+    private boolean textureCoordEnabledDirty = false;
+    // textureEnvMode: 1 GL_ADD, 2 GL_MODULATE (default), 3 GL_DECAL, 4 GL_BLEND, 5 GL_REPLACE, 6 GL_COMBINE
+    private final IntBuffer textureEnvMode = Buffers.newDirectIntBuffer(new int[] { 2, 2, 2, 2, 2, 2, 2, 2 });
+    private boolean textureEnvModeDirty = false;
+    private final IntBuffer textureFormat = Buffers.newDirectIntBuffer(new int[] { 0, 0, 0, 0, 0, 0, 0, 0 }); // per unit
+    private boolean textureFormatDirty = false;
+
+    /** ES2 supports CullFace implicit
+    private int cullFace=-2; // <=0 disabled, 1 GL_FRONT, 2 GL_BACK (default) and 3 GL_FRONT_AND_BACK
+    private boolean cullFaceDirty = false;
+    private static final String mgl_CullFace         = "mgl_CullFace";        //  1i (lowp int) */
 
-    protected boolean textureEnabled=false;
-    protected IntBuffer textureCoordsEnabled = Buffers.newDirectIntBuffer(new int[] { 0, 0, 0, 0, 0, 0, 0, 0 });
-    protected boolean textureCoordsEnabledDirty = false;
-    protected int     activeTextureUnit=0;
+    private boolean colorVAEnabledDirty = false;
+    private boolean lightingEnabled=false;
+    private final IntBuffer lightsEnabled = Buffers.newDirectIntBuffer(new int[] { 0, 0, 0, 0, 0, 0, 0, 0 });
+    private boolean   lightsEnabledDirty = false;
 
-    protected int cullFace=-2; // <=0 disabled, 1: front, 2: back (default, but disabled), 3: front & back
+    private boolean alphaTestDirty=false;
+    private int alphaTestFunc=-8; // <=0 disabled; 1 GL_NEVER, 2 GL_LESS, 3 GL_EQUAL, 4 GL_LEQUAL, 5 GL_GREATER, 6 GL_NOTEQUAL, 7 GL_GEQUAL, and 8 GL_ALWAYS (default)
+    private float alphaTestRef=0f;
 
-    protected boolean lightingEnabled=false;
-    protected IntBuffer lightsEnabled = Buffers.newDirectIntBuffer(new int[] { 0, 0, 0, 0, 0, 0, 0, 0 });
-    protected boolean   lightsEnabledDirty = false;
+    private boolean pointParamsDirty = false;
+    /** ( pointSize, pointSmooth, attn. pointMinSize, attn. pointMaxSize ) , ( attenuation coefficients 1f 0f 0f, attenuation fade theshold 1f )   */
+    private final FloatBuffer pointParams = Buffers.newDirectFloatBuffer(new float[] {  1.0f, 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f, 1.0f });
 
-    protected PMVMatrix pmvMatrix;
-    protected ShaderState shaderState;
-    protected ShaderProgram shaderProgramColor;
-    protected ShaderProgram shaderProgramColorTexture;
-    protected ShaderProgram shaderProgramColorLight;
-    protected ShaderProgram shaderProgramColorTextureLight;
+    private PMVMatrix pmvMatrix;
+    private ShaderState shaderState;
+    private ShaderProgram shaderProgramColor;
+    private ShaderProgram shaderProgramColorTexture2, shaderProgramColorTexture4, shaderProgramColorTexture8;
+    private ShaderProgram shaderProgramColorLight;
+    private ShaderProgram shaderProgramColorTexture8Light;
+    private ShaderProgram shaderProgramPoints;
+
+    private ShaderSelectionMode requestedShaderSelectionMode = ShaderSelectionMode.AUTO;
+    private ShaderSelectionMode currentShaderSelectionMode = requestedShaderSelectionMode;
 
     // uniforms ..
-    protected static final String mgl_PMVMatrix        = "mgl_PMVMatrix";       // m4fv[4] - P, Mv, Mvi and Mvit
-    protected static final String mgl_ColorEnabled     = "mgl_ColorEnabled";    //  1i
-    protected static final String mgl_ColorStatic      = "mgl_ColorStatic";     //  4fv
-
-    protected static final String mgl_LightSource      = "mgl_LightSource";     //  struct mgl_LightSourceParameters[MAX_LIGHTS]
-    protected static final String mgl_FrontMaterial    = "mgl_FrontMaterial";   //  struct mgl_MaterialParameters
-    protected static final String mgl_LightsEnabled    = "mgl_LightsEnabled";   //  int mgl_LightsEnabled[MAX_LIGHTS];
-
-    protected static final String mgl_ShadeModel       = "mgl_ShadeModel";      //  1i
-
-    protected static final String mgl_TexCoordEnabled  = "mgl_TexCoordEnabled"; //  int mgl_TexCoordEnabled[MAX_TEXTURE_UNITS];
-    protected static final String mgl_ActiveTexture    = "mgl_ActiveTexture";   //  1i
-    protected static final String mgl_ActiveTextureIdx = "mgl_ActiveTextureIdx";//  1i
-
-    protected static final String mgl_CullFace         = "mgl_CullFace";   //  1i
-
-    protected static final FloatBuffer zero4f     = Buffers.newDirectFloatBuffer(new float[] { 0.0f, 0.0f, 0.0f, 0.0f });
-
-    public static final FloatBuffer defAmbient = Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, 0f, 1f });
-    public static final FloatBuffer defDiffuse = zero4f;
-    public static final FloatBuffer defSpecular= zero4f;
-    public static final FloatBuffer defPosition= Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, 1f, 0f });
-    public static final FloatBuffer defSpotDir = Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, -1f });
-    public static final float defSpotExponent  = 0f;
-    public static final float defSpotCutoff    = 180f;
-    public static final float defConstantAtten = 1f;
-    public static final float defLinearAtten   = 0f;
-    public static final float defQuadraticAtten= 0f;
-
-    public static final FloatBuffer defMatAmbient = Buffers.newDirectFloatBuffer(new float[] { 0.2f, 0.2f, 0.2f, 1.0f });
-    public static final FloatBuffer defMatDiffuse = Buffers.newDirectFloatBuffer(new float[] { 0.8f, 0.8f, 0.8f, 1.0f });
-    public static final FloatBuffer defMatSpecular= Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, 0f, 1f});
-    public static final FloatBuffer defMatEmission= Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, 0f, 1f});
+    private static final String mgl_PMVMatrix        = "mgl_PMVMatrix";       // m4fv[4] - P, Mv, Mvi and Mvit
+    private static final String mgl_ColorEnabled     = "mgl_ColorEnabled";    //  1i
+    private static final String mgl_ColorStatic      = "mgl_ColorStatic";     //  4fv
+
+    private static final String mgl_LightModel       = "mgl_LightModel";      //  struct mgl_LightModelParameters
+    private static final String mgl_LightSource      = "mgl_LightSource";     //  struct mgl_LightSourceParameters[MAX_LIGHTS]
+    private static final String mgl_FrontMaterial    = "mgl_FrontMaterial";   //  struct mgl_MaterialParameters
+    private static final String mgl_LightsEnabled    = "mgl_LightsEnabled";   //  int mgl_LightsEnabled[MAX_LIGHTS];
+
+    private static final String mgl_AlphaTestFunc    = "mgl_AlphaTestFunc";   //  1i (lowp int)
+    private static final String mgl_AlphaTestRef     = "mgl_AlphaTestRef";    //  1f
+    private static final String mgl_ShadeModel       = "mgl_ShadeModel";      //  1i
+    private static final String mgl_PointParams      = "mgl_PointParams";     //  vec4[2]: { (sz, smooth, attnMinSz, attnMaxSz), (attnCoeff(3), attnFadeTs) }
+
+    private static final String mgl_TextureEnabled   = "mgl_TextureEnabled";  //  int mgl_TextureEnabled[MAX_TEXTURE_UNITS];
+    private static final String mgl_Texture          = "mgl_Texture";         //  sampler2D mgl_Texture<0..7>
+    private static final String mgl_TexCoordEnabled  = "mgl_TexCoordEnabled"; //  int mgl_TexCoordEnabled[MAX_TEXTURE_UNITS];
+    private static final String mgl_TexEnvMode       = "mgl_TexEnvMode";      //  int mgl_TexEnvMode[MAX_TEXTURE_UNITS];
+    private static final String mgl_TexFormat        = "mgl_TexFormat";       //  int mgl_TexFormat[MAX_TEXTURE_UNITS];
+
+    // private static final FloatBuffer zero4f = Buffers.newDirectFloatBuffer(new float[] { 0.0f, 0.0f, 0.0f, 0.0f });
+    private static final FloatBuffer neut4f = Buffers.newDirectFloatBuffer(new float[] { 0.0f, 0.0f, 0.0f, 1.0f });
+    private static final FloatBuffer one4f  = Buffers.newDirectFloatBuffer(new float[] { 1.0f, 1.0f, 1.0f, 1.0f });
+
+    public static final FloatBuffer defAmbient   = neut4f;
+    public static final FloatBuffer defDiffuseN  = neut4f;
+    public static final FloatBuffer defSpecularN = neut4f;
+    public static final FloatBuffer defPosition  = Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, 1f, 0f });
+    public static final FloatBuffer defSpotDir   = Buffers.newDirectFloatBuffer(new float[] { 0f, 0f, -1f });
+    public static final float defSpotExponent    = 0f;
+    public static final float defSpotCutoff      = 180f;
+    public static final float defConstantAtten   = 1f;
+    public static final float defLinearAtten     = 0f;
+    public static final float defQuadraticAtten  = 0f;
+
+    public static final FloatBuffer defLightModelAmbient = Buffers.newDirectFloatBuffer(new float[] { 0.2f, 0.2f, 0.2f, 1.0f });
+
+    public static final FloatBuffer defMatAmbient   = Buffers.newDirectFloatBuffer(new float[] { 0.2f, 0.2f, 0.2f, 1.0f });
+    public static final FloatBuffer defMatDiffuse   = Buffers.newDirectFloatBuffer(new float[] { 0.8f, 0.8f, 0.8f, 1.0f });
+    public static final FloatBuffer defMatSpecular  = neut4f;
+    public static final FloatBuffer defMatEmission  = neut4f;
     public static final float       defMatShininess = 0f;
 
-    protected static final String vertexColorFileDef          = "FixedFuncColor";
-    protected static final String vertexColorLightFileDef    = "FixedFuncColorLight";
-    protected static final String fragmentColorFileDef        = "FixedFuncColor";
-    protected static final String fragmentColorTextureFileDef = "FixedFuncColorTexture";
-    protected static final String shaderSrcRootDef = "shaders" ;
-    protected static final String shaderBinRootDef = "shaders/bin" ;
+    private static final String vertexColorFileDef           = "FixedFuncColor";
+    private static final String vertexColorLightFileDef      = "FixedFuncColorLight";
+    private static final String fragmentColorFileDef         = "FixedFuncColor";
+    private static final String fragmentColorTextureFileDef  = "FixedFuncColorTexture";
+    private static final String shaderPointFileDef           = "FixedFuncPoints";
+    private static final String shaderSrcRootDef             = "shaders" ;
+    private static final String shaderBinRootDef             = "shaders/bin" ;
+
+    private final Class<?> shaderRootClass;
+    private final String shaderSrcRoot;
+    private final String shaderBinRoot;
+    private final String vertexColorFile;
+    private final String vertexColorLightFile;
+    private final String fragmentColorFile;
+    private final String fragmentColorTextureFile;
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.fp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.fp
index 408ff7251..22dd1e61a 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.fp
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.fp
@@ -1,16 +1,32 @@
+
+#if __VERSION__ >= 130
+  #define varying in
+  out vec4 mgl_FragColor;
+#else
+  #define mgl_FragColor gl_FragColor   
+#endif
+
 #include es_precision.glsl
 
 #include mgl_uniform.glsl
 #include mgl_varying.glsl
 
+#include mgl_alphatest.fp
+
 void main (void)
 {
-  if( mgl_CullFace > 0 && 
-      ( ( mgl_CullFace == 1 && gl_FrontFacing ) ||
-        ( mgl_CullFace == 2 && !gl_FrontFacing ) ||
-        ( mgl_CullFace == 3 ) ) ) {
-    discard;
+  vec4 color = frontColor;
+
+  /** ES2 supports CullFace implicit ..
+  if( mgl_CullFace > 0 &&
+      ( ( MGL_FRONT          == mgl_CullFace &&  gl_FrontFacing ) ||
+        ( MGL_BACK           == mgl_CullFace && !gl_FrontFacing ) ||
+        ( MGL_FRONT_AND_BACK == mgl_CullFace ) ) ) {
+      DISCARD(color);
+  } */
+  if( mgl_AlphaTestFunc > 0 ) {
+      alphaTest(color);
   }
-  gl_FragColor = frontColor;
+  mgl_FragColor = color;
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.vp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.vp
index 346e40196..f39fcfbd0 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.vp
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColor.vp
@@ -1,3 +1,9 @@
+
+#if __VERSION__ >= 130
+  #define attribute in
+  #define varying out
+#endif
+
 #include es_precision.glsl
 
 #include mgl_const.glsl
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorLight.vp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorLight.vp
index 7ce1eedcf..942a540af 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorLight.vp
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorLight.vp
@@ -1,3 +1,9 @@
+
+#if __VERSION__ >= 130
+  #define attribute in
+  #define varying out
+#endif
+
 #include es_precision.glsl
 #include mgl_lightdef.glsl
 
@@ -50,16 +56,18 @@ void main(void)
       }
     }
   }
-  ambient  *= mgl_FrontMaterial.ambient;
-  diffuse  *= mgl_FrontMaterial.diffuse;
-  specular *= mgl_FrontMaterial.specular;
-
   if(mgl_ColorEnabled>0) {
     frontColor=mgl_Color;
   } else {
     frontColor=mgl_ColorStatic;
   }
   if( lightEnabled ) {
+    //                   light-ambient                               +                 global-ambient
+    // ( mgl_LightSource[0..n].ambient * mgl_FrontMaterial.ambient ) + ( mgl_LightModel.ambient * mgl_FrontMaterial.ambient )
+    ambient   = ( ambient + mgl_LightModel.ambient ) * mgl_FrontMaterial.ambient;
+    diffuse  *= mgl_FrontMaterial.diffuse;
+    specular *= mgl_FrontMaterial.specular;
+
     frontColor *= ambient + diffuse + specular;
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorTexture.fp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorTexture.fp
index 86e6ace73..130711e19 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorTexture.fp
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncColorTexture.fp
@@ -1,4 +1,13 @@
 
+#if __VERSION__ >= 130
+  #define varying in
+  out vec4 mgl_FragColor;
+  #define texture2D texture
+#else
+  #define mgl_FragColor gl_FragColor   
+#endif
+
+
 #include es_precision.glsl
 #include mgl_lightdef.glsl
 
@@ -6,42 +15,103 @@
 #include mgl_uniform.glsl
 #include mgl_varying.glsl
 
-vec4 getTexColor(in sampler2D tex, in int idx) {
-    vec4 coord;
-    if(idx==0) {
-        coord= mgl_TexCoords[0];
-    } else if(idx==1) {
-        coord= mgl_TexCoords[1];
-    } else if(idx==2) {
-        coord= mgl_TexCoords[2];
-    } else if(idx==3) {
-        coord= mgl_TexCoords[3];
-    } else if(idx==4) {
-        coord= mgl_TexCoords[4];
-    } else if(idx==5) {
-        coord= mgl_TexCoords[5];
-    } else if(idx==6) {
-        coord= mgl_TexCoords[6];
-    } else {
-        coord= mgl_TexCoords[7];
+#include mgl_alphatest.fp
+
+const float gamma = 1.5; // FIXME
+const vec3 igammav = vec3(1.0 / gamma); // FIXME
+const vec4 texEnvColor = vec4(0.0); // FIXME
+
+const vec4 zerov4 = vec4(0.0);
+const vec4 onev4 = vec4(1.0);
+
+void calcTexColor(inout vec4 color, vec4 texColor, in int texFormat, in int texEnvMode) {
+    if(MGL_MODULATE == texEnvMode) { // default
+        if( 4 == texFormat ) {
+            color *= texColor;
+        } else {
+            color.rgb *= texColor.rgb;
+        }
+    } else if(MGL_REPLACE == texEnvMode) {
+        if( 4 == texFormat ) {
+            color = texColor;
+        } else {
+            color.rgb = texColor.rgb;
+        }
+    } else if(MGL_ADD == texEnvMode) {
+        if( 4 == texFormat ) {
+            color += texColor;
+        } else {
+            color.rgb += texColor.rgb;
+        }
+    } else if(MGL_BLEND == texEnvMode) {
+        color.rgb = mix(color.rgb, texEnvColor.rgb, texColor.rgb);
+        if( 4 == texFormat ) {
+            color.a *= texColor.a;
+        }
+    } else if(MGL_DECAL == texEnvMode) {
+        if( 4 == texFormat ) {
+            color.rgb = mix(color.rgb, texColor.rgb, texColor.a);
+        } else {
+            color.rgb = texColor.rgb;
+        }
     }
-    return texture2D(tex, coord.st);
+    color = clamp(color, zerov4, onev4);
 }
 
 void main (void)
-{
-  if( mgl_CullFace > 0 && 
-      ( ( mgl_CullFace == 1 && gl_FrontFacing ) ||
-        ( mgl_CullFace == 2 && !gl_FrontFacing ) ||
-        ( mgl_CullFace == 3 ) ) ) {
-    discard;
-  }
-
-  vec4 texColor = getTexColor(mgl_ActiveTexture,mgl_ActiveTextureIdx);
-
-  if(length(texColor.rgb)>0.0) {
-    gl_FragColor = vec4(frontColor.rgb*texColor.rgb, frontColor.a) ;
+{ 
+  vec4 color = frontColor;
+
+  /** ES2 supports CullFace implicit ..
+  if( mgl_CullFace > 0 &&
+      ( ( MGL_FRONT          == mgl_CullFace &&  gl_FrontFacing ) ||
+        ( MGL_BACK           == mgl_CullFace && !gl_FrontFacing ) ||
+        ( MGL_FRONT_AND_BACK == mgl_CullFace ) ) ) {
+      DISCARD(color);
+  } else { */
+      #if MAX_TEXTURE_UNITS >= 2
+      if( 0 != mgl_TextureEnabled[0] ) {
+        calcTexColor(color, texture2D(mgl_Texture0, mgl_TexCoords[0].st), mgl_TexFormat[0], mgl_TexEnvMode[0]);
+      }
+      if( 0 != mgl_TextureEnabled[1] ) {
+        calcTexColor(color, texture2D(mgl_Texture1, mgl_TexCoords[1].st), mgl_TexFormat[1], mgl_TexEnvMode[1]);
+      }
+      #endif
+      #if MAX_TEXTURE_UNITS >= 4
+      if( 0 != mgl_TextureEnabled[2] ) {
+        calcTexColor(color, texture2D(mgl_Texture2, mgl_TexCoords[2].st), mgl_TexFormat[2], mgl_TexEnvMode[2]);
+      }
+      if( 0 != mgl_TextureEnabled[3] ) {
+        calcTexColor(color, texture2D(mgl_Texture3, mgl_TexCoords[3].st), mgl_TexFormat[3], mgl_TexEnvMode[3]);
+      }
+      #endif
+      #if MAX_TEXTURE_UNITS >= 8
+      if( 0 != mgl_TextureEnabled[4] ) {
+        calcTexColor(color, texture2D(mgl_Texture4, mgl_TexCoords[4].st), mgl_TexFormat[4], mgl_TexEnvMode[4]);
+      }
+      if( 0 != mgl_TextureEnabled[5] ) {
+        calcTexColor(color, texture2D(mgl_Texture5, mgl_TexCoords[5].st), mgl_TexFormat[5], mgl_TexEnvMode[5]);
+      }
+      if( 0 != mgl_TextureEnabled[6] ) {
+        calcTexColor(color, texture2D(mgl_Texture6, mgl_TexCoords[6].st), mgl_TexFormat[6], mgl_TexEnvMode[6]);
+      }
+      if( 0 != mgl_TextureEnabled[7] ) {
+        calcTexColor(color, texture2D(mgl_Texture7, mgl_TexCoords[7].st), mgl_TexFormat[7], mgl_TexEnvMode[7]);
+      }
+      #endif
+      if( mgl_AlphaTestFunc > 0 ) {
+        alphaTest(color);
+      }
+  // } /* CullFace */
+
+  mgl_FragColor = color;
+  /**
+  // simple alpha check
+  if (color.a != 0.0) {
+      mgl_FragColor = vec4(pow(color.rgb, igammav), color.a);
   } else {
-    gl_FragColor = frontColor;
-  }
+      // discard; // freezes NV tegra2 compiler
+      mgl_FragColor = color;
+  } */
 }
+
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncPoints.fp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncPoints.fp
new file mode 100644
index 000000000..2d58f2320
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncPoints.fp
@@ -0,0 +1,47 @@
+
+#if __VERSION__ >= 130
+  #define varying in
+  out vec4 mgl_FragColor;
+#else
+  #define mgl_FragColor gl_FragColor   
+#endif
+
+
+#include es_precision.glsl
+#include mgl_lightdef.glsl
+
+#include mgl_const.glsl
+#include mgl_uniform.glsl
+#include mgl_varying.glsl
+
+// #define TEST 1
+
+void main (void)
+{ 
+  mgl_FragColor = frontColor;
+
+  if( pointSmooth > 0.5 ) {
+      // smooth (AA)
+      const float border = 0.90; // take/give 10% for AA
+
+      // origin to 0/0, [-1/-1 .. 1/1]
+      vec2 pointPos = 2.0 * gl_PointCoord - 1.0 ;
+      float r = length( pointPos ); // one-circle sqrt(x * x + y * y), range: in-circle [0..1], out >1
+      float r1 = 1.0 - ( step(border, r) * 10.0 * ( r - border ) ) ; // [0..1]
+      #ifndef TEST
+          if( r1 < 0.0 ) {
+            discard;
+          }
+      #endif
+
+      #ifndef TEST
+          mgl_FragColor.a *= r1;
+      #else
+          mgl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
+          mgl_FragColor.r = r1 < 0.0 ? 1.0 : 0.0;
+          mgl_FragColor.g = r > 1.0 ? 1.0 : 0.0;
+          mgl_FragColor.b = r > border ? 1.0 : 0.0;
+      #endif
+  }
+}
+
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncPoints.vp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncPoints.vp
new file mode 100644
index 000000000..4a5d93a3d
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/FixedFuncPoints.vp
@@ -0,0 +1,40 @@
+
+#if __VERSION__ >= 130
+  #define attribute in
+  #define varying out
+#endif
+
+#include es_precision.glsl
+
+#include mgl_const.glsl
+#include mgl_uniform.glsl
+#include mgl_attribute.glsl
+#include mgl_varying.glsl
+
+#include mgl_settexcoord.vp
+
+void main(void)
+{
+  if( mgl_ColorEnabled > 0 ) {
+    frontColor = mgl_Color;
+  } else {
+    frontColor = mgl_ColorStatic;
+  }
+
+  vec4 eyeCoord = mgl_PMVMatrix[1] * mgl_Vertex;
+  gl_Position = mgl_PMVMatrix[0] * eyeCoord;
+
+  float dist = distance(eyeCoord, vec4(0.0, 0.0, 0.0, 1.0));
+  float atten = sqrt( 1.0 / ( pointDistanceConstantAtten +
+                              ( pointDistanceLinearAtten +
+                                pointDistanceQuadraticAtten * dist
+                              ) * dist
+                            )
+                    );
+  float size = clamp(pointSize * atten, pointSizeMin, pointSizeMax);
+  gl_PointSize = max(size, pointFadeThresholdSize);
+
+  float fade = min(size, pointFadeThresholdSize) / pointFadeThresholdSize;
+  frontColor.a *= fade * fade;
+}
+
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_alphatest.fp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_alphatest.fp
new file mode 100644
index 000000000..2b64cdeb8
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_alphatest.fp
@@ -0,0 +1,33 @@
+
+void alphaTest(inout vec4 color) {
+    if( MGL_GREATER == mgl_AlphaTestFunc ) {
+        if ( color.a <= mgl_AlphaTestRef ) {
+            DISCARD(color);
+        }
+    } else if( MGL_LESS == mgl_AlphaTestFunc ) {
+        if ( color.a >= mgl_AlphaTestRef ) {
+            DISCARD(color);
+        }
+    } else if( MGL_LEQUAL == mgl_AlphaTestFunc ) {
+        if ( color.a > mgl_AlphaTestRef ) {
+            DISCARD(color);
+        }
+    } else if( MGL_GEQUAL == mgl_AlphaTestFunc ) {
+        if ( color.a < mgl_AlphaTestRef ) {
+            DISCARD(color);
+        }
+    } else if( MGL_EQUAL == mgl_AlphaTestFunc ) {
+        if ( abs( color.a - mgl_AlphaTestRef ) > EPSILON ) {
+            DISCARD(color);
+        }
+    } else if( MGL_NOTEQUAL == mgl_AlphaTestFunc ) {
+        if ( abs( color.a - mgl_AlphaTestRef ) <= EPSILON ) {
+            DISCARD(color);
+        }
+    } else if( MGL_NEVER == mgl_AlphaTestFunc ) {
+        DISCARD(color);
+    } /* else if( MGL_ALWAYS == mgl_AlphaTestFunc ) {
+      // NOP
+    } */
+}
+
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_attribute.glsl b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_attribute.glsl
index 09a11ec95..f670f7b77 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_attribute.glsl
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_attribute.glsl
@@ -4,16 +4,22 @@
 
 #include es_precision.glsl
 
-attribute HIGHP vec4    mgl_Vertex;
-attribute HIGHP vec4    mgl_Normal;
-attribute HIGHP vec4    mgl_Color;
-attribute HIGHP vec4    mgl_MultiTexCoord0;
-attribute HIGHP vec4    mgl_MultiTexCoord1;
-attribute HIGHP vec4    mgl_MultiTexCoord2;
-attribute HIGHP vec4    mgl_MultiTexCoord3;
-attribute HIGHP vec4    mgl_MultiTexCoord4;
-attribute HIGHP vec4    mgl_MultiTexCoord5;
-attribute HIGHP vec4    mgl_MultiTexCoord6;
-attribute HIGHP vec4    mgl_MultiTexCoord7;
+attribute vec4    mgl_Vertex;
+attribute vec4    mgl_Normal;
+attribute vec4    mgl_Color;
+#if MAX_TEXTURE_UNITS >= 2
+attribute vec4    mgl_MultiTexCoord0;
+attribute vec4    mgl_MultiTexCoord1;
+#endif
+#if MAX_TEXTURE_UNITS >= 4
+attribute vec4    mgl_MultiTexCoord2;
+attribute vec4    mgl_MultiTexCoord3;
+#endif
+#if MAX_TEXTURE_UNITS >= 8
+attribute vec4    mgl_MultiTexCoord4;
+attribute vec4    mgl_MultiTexCoord5;
+attribute vec4    mgl_MultiTexCoord6;
+attribute vec4    mgl_MultiTexCoord7;
+#endif
 
 #endif // mgl_attribute_glsl
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_const.glsl b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_const.glsl
index 1a464a1cb..4f97292e3 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_const.glsl
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_const.glsl
@@ -4,7 +4,36 @@
 
 #include es_precision.glsl
 
-const   LOWP int     MAX_TEXTURE_UNITS = 8; // <=gl_MaxTextureImageUnits 
+// will be defined at runtime: MAX_TEXTURE_UNITS [0|2|4|8]
 const   LOWP int     MAX_LIGHTS = 8; 
 
+const        float   EPSILON =  0.0000001;  // FIXME: determine proper hw-precision
+
+// discard freezes NV tegra2 compiler (STILL TRUE?)
+// #define DISCARD(c) (c.a = 0.0)
+#define DISCARD(c) discard
+
+// Texture Environment / Multi Texturing
+#define MGL_ADD      1
+#define MGL_MODULATE 2
+#define MGL_DECAL    3
+#define MGL_BLEND    4
+#define MGL_REPLACE  5
+#define MGL_COMBINE  6
+
+// Alpha Test
+#define MGL_NEVER    1
+#define MGL_LESS     2
+#define MGL_EQUAL    3
+#define MGL_LEQUAL   4
+#define MGL_GREATER  5
+#define MGL_NOTEQUAL 6
+#define MGL_GEQUAL   7
+#define MGL_ALWAYS   8
+
+// Cull Face
+#define MGL_FRONT            1
+#define MGL_BACK             2
+#define MGL_FRONT_AND_BACK   3
+
 #endif // mgl_const_glsl
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_lightdef.glsl b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_lightdef.glsl
index 98e214139..deaf95408 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_lightdef.glsl
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_lightdef.glsl
@@ -1,6 +1,9 @@
 #ifndef mgl_lightdef_glsl
 #define mgl_lightdef_glsl
 
+struct mgl_LightModelParameters {
+   vec4 ambient; 
+};
 struct mgl_LightSourceParameters {
    vec4 ambient; 
    vec4 diffuse; 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_settexcoord.vp b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_settexcoord.vp
index 1efe328d0..cbf0db642 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_settexcoord.vp
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_settexcoord.vp
@@ -22,14 +22,20 @@ void setTexCoord(in vec4 defpos) {
   mgl_TexCoords[7] = ( 0 != (mgl_TexCoordEnabled & 128) ) ? mgl_MultiTexCoord7 : defpos;
    */
   
+  #if MAX_TEXTURE_UNITS >= 2
   mgl_TexCoords[0] = ( 0 != mgl_TexCoordEnabled[0] ) ? mgl_MultiTexCoord0 : defpos;
   mgl_TexCoords[1] = ( 0 != mgl_TexCoordEnabled[1] ) ? mgl_MultiTexCoord1 : defpos;
+  #endif
+  #if MAX_TEXTURE_UNITS >= 4
   mgl_TexCoords[2] = ( 0 != mgl_TexCoordEnabled[2] ) ? mgl_MultiTexCoord2 : defpos;
   mgl_TexCoords[3] = ( 0 != mgl_TexCoordEnabled[3] ) ? mgl_MultiTexCoord3 : defpos;
+  #endif
+  #if MAX_TEXTURE_UNITS >= 8
   mgl_TexCoords[4] = ( 0 != mgl_TexCoordEnabled[4] ) ? mgl_MultiTexCoord4 : defpos;
   mgl_TexCoords[5] = ( 0 != mgl_TexCoordEnabled[5] ) ? mgl_MultiTexCoord5 : defpos;
   mgl_TexCoords[6] = ( 0 != mgl_TexCoordEnabled[6] ) ? mgl_MultiTexCoord6 : defpos;
   mgl_TexCoords[7] = ( 0 != mgl_TexCoordEnabled[7] ) ? mgl_MultiTexCoord7 : defpos;
+  #endif
 }
 
 #endif // mgl_settexcoord_vp
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform.glsl b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform.glsl
index 4c4000dfa..5029e4bd8 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform.glsl
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform.glsl
@@ -6,12 +6,45 @@
 
 #include mgl_const.glsl
 
-uniform HIGHP   mat4    mgl_PMVMatrix[4]; // P, Mv, Mvi and Mvit (transpose(inverse(ModelView)) == normalMatrix)
+uniform         mat4    mgl_PMVMatrix[4]; // P, Mv, Mvi and Mvit (transpose(inverse(ModelView)) == normalMatrix)
 uniform LOWP    int     mgl_ColorEnabled;
-uniform HIGHP   vec4    mgl_ColorStatic;
+uniform         vec4    mgl_ColorStatic;
+uniform LOWP    int     mgl_AlphaTestFunc;
+uniform         float   mgl_AlphaTestRef;
+
+// [0].rgba: size, smooth, attnMinSz, attnMaxSz
+// [1].rgba: attnCoeff(3), attnFadeTs
+uniform MEDIUMP vec4    mgl_PointParams[2];
+
+#define pointSize                   (mgl_PointParams[0].r)
+#define pointSmooth                 (mgl_PointParams[0].g)
+#define pointSizeMin                (mgl_PointParams[0].b)
+#define pointSizeMax                (mgl_PointParams[0].a)
+#define pointDistanceConstantAtten  (mgl_PointParams[1].r)
+#define pointDistanceLinearAtten    (mgl_PointParams[1].g)
+#define pointDistanceQuadraticAtten (mgl_PointParams[1].b)
+#define pointFadeThresholdSize      (mgl_PointParams[1].a)
+
+// uniform LOWP int    mgl_CullFace; // ES2 supports CullFace implicit ..
+#if MAX_TEXTURE_UNITS > 0
+uniform LOWP    int     mgl_TextureEnabled[MAX_TEXTURE_UNITS];
 uniform LOWP    int     mgl_TexCoordEnabled[MAX_TEXTURE_UNITS];
-uniform       sampler2D mgl_ActiveTexture;
-uniform LOWP    int     mgl_ActiveTextureIdx;
-uniform LOWP    int     mgl_CullFace;
+uniform LOWP    int     mgl_TexEnvMode[MAX_TEXTURE_UNITS];
+uniform LOWP    int     mgl_TexFormat[MAX_TEXTURE_UNITS];
+#if MAX_TEXTURE_UNITS >= 2
+uniform   sampler2D     mgl_Texture0;
+uniform   sampler2D     mgl_Texture1;
+#endif
+#if MAX_TEXTURE_UNITS >= 4
+uniform   sampler2D     mgl_Texture2;
+uniform   sampler2D     mgl_Texture3;
+#endif
+#if MAX_TEXTURE_UNITS >= 8
+uniform   sampler2D     mgl_Texture4;
+uniform   sampler2D     mgl_Texture5;
+uniform   sampler2D     mgl_Texture6;
+uniform   sampler2D     mgl_Texture7;
+#endif
+#endif
 
 #endif // mgl_uniform_glsl
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform_light.glsl b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform_light.glsl
index 0dedb5d5d..5b34fd9cf 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform_light.glsl
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_uniform_light.glsl
@@ -9,6 +9,7 @@
 
 uniform LOWP    int     mgl_LightsEnabled[MAX_LIGHTS];
 
+uniform mgl_LightModelParameters  mgl_LightModel;
 uniform mgl_LightSourceParameters mgl_LightSource[MAX_LIGHTS];
 uniform mgl_MaterialParameters    mgl_FrontMaterial;
 
diff --git a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_varying.glsl b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_varying.glsl
index fc9f735d1..599ac4a53 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_varying.glsl
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/shaders/mgl_varying.glsl
@@ -7,6 +7,8 @@
 #include mgl_const.glsl
 
 varying   vec4    frontColor;
+#if MAX_TEXTURE_UNITS > 0
 varying   vec4    mgl_TexCoords[MAX_TEXTURE_UNITS];
+#endif
 
 #endif // mgl_varying_glsl
diff --git a/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java b/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java
new file mode 100644
index 000000000..45087ea2c
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java
@@ -0,0 +1,1517 @@
+/**
+ * Original JavaScript code from <https://github.com/notmasteryet/jpgjs/blob/master/jpg.js>,
+ * ported to Java for JogAmp Community.
+ *
+ * Enhancements:
+ *  * InputStream instead of memory buffer
+ *  * User provided memory handler
+ *  * Fixed JPEG Component ID/Index mapping
+ *  * Color space conversion (YCCK, CMYK -> RGB)
+ *  * More error tolerant
+ *
+ * *****************
+ *
+ * Copyright 2011 notmasteryet
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * *****************
+ *
+ * Copyright 2013 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+
+package jogamp.opengl.util.jpeg;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import jogamp.opengl.Debug;
+
+import com.jogamp.common.util.ArrayHashSet;
+import com.jogamp.common.util.Bitstream;
+import com.jogamp.common.util.VersionNumber;
+import com.jogamp.opengl.util.texture.TextureData;
+import com.jogamp.opengl.util.texture.TextureData.ColorSpace;
+
+/**
+ *
+ * <ul>
+ *   <li> The JPEG specification can be found in the ITU CCITT Recommendation T.81
+ *        (www.w3.org/Graphics/JPEG/itu-t81.pdf) </li>
+ *   <li> The JFIF specification can be found in the JPEG File Interchange Format
+ *        (www.w3.org/Graphics/JPEG/jfif3.pdf)</li>
+ *   <li> The Adobe Application-Specific JPEG markers in the Supporting the DCT Filters
+ *        in PostScript Level 2, Technical Note #5116
+ *        (partners.adobe.com/public/developer/en/ps/sdk/5116.DCT_Filter.pdf)</li>
+ *   <li> http://halicery.com/jpeg/huffman.html </li>
+ *   <li> https://en.wikipedia.org/wiki/Jpg#Syntax_and_structure </li>
+ *   <li> http://www.cs.sfu.ca/CourseCentral/365/mark/material/notes/Chap4/Chap4.2/Chap4.2.html </li>
+ *   <li> https://github.com/notmasteryet/jpgjs/blob/master/jpg.js </li>
+ * </ul>
+ */
+public class JPEGDecoder {
+    private static final boolean DEBUG = Debug.debug("JPEGImage");
+    private static final boolean DEBUG_IN = false;
+
+    /** Allows user to hook a {@link ColorSink} to another toolkit to produce {@link TextureData}. */
+    public static interface ColorSink {
+        /**
+         * @param width
+         * @param height
+         * @param sourceCS the color-space of the decoded JPEG
+         * @param sourceComponents number of components used for the given source color-space
+         * @return Either {@link TextureData.ColorSpace#RGB} or {@link TextureData.ColorSpace#YCbCr}. {@link TextureData.ColorSpace#YCCK} and {@link TextureData.ColorSpace#CMYK} will throw an exception!
+         * @throws RuntimeException
+         */
+        public TextureData.ColorSpace allocate(int width, int height, TextureData.ColorSpace sourceCS, int sourceComponents) throws RuntimeException;
+        public void store2(int x, int y, byte c1, byte c2);
+        public void storeRGB(int x, int y, byte r, byte g, byte b);
+        public void storeYCbCr(int x, int y, byte Y, byte Cb, byte Cr);
+    }
+
+    public static class JFIF {
+        final VersionNumber version;
+        final int densityUnits;
+        final int xDensity;
+        final int yDensity;
+        final int thumbWidth;
+        final int thumbHeight;
+        final byte[] thumbData;
+
+        private JFIF(final byte data[]) {
+            version = new VersionNumber(data[5], data[6], 0);
+            densityUnits = data[7];
+            xDensity = (data[8] << 8) | data[9];
+            yDensity = (data[10] << 8) | data[11];
+            thumbWidth = data[12];
+            thumbHeight = data[13];
+            if( 0 < thumbWidth && 0 < thumbHeight ) {
+                final int len = 14 + 3 * thumbWidth * thumbHeight;
+                thumbData = new byte[len];
+                System.arraycopy(data, 14, thumbData, 0, len);
+            } else {
+                thumbData = null;
+            }
+        }
+
+        public static final JFIF get(final byte[] data) throws RuntimeException {
+            if ( data[0] == (byte)0x4A && data[1] == (byte)0x46 && data[2] == (byte)0x49 &&
+                 data[3] == (byte)0x46 && data[4] == (byte)0x0) { // 'JFIF\x00'
+                final JFIF r = new JFIF(data);
+                return r;
+            } else {
+                return null;
+            }
+        }
+
+        @Override
+        public final String toString() {
+            return "JFIF[ver "+version+", density[units "+densityUnits+", "+xDensity+"x"+yDensity+"], thumb "+thumbWidth+"x"+thumbHeight+"]";
+        }
+    }
+
+    public static class Adobe {
+        final short version;
+        final short flags0;
+        final short flags1;
+        final short colorCode;
+        final ColorSpace colorSpace;
+
+        private Adobe(final byte[] data) {
+            version = data[6];
+            flags0 = (short) ( (data[7] << 8) | data[8]  ) ;
+            flags1 = (short) ( (data[9] << 8) | data[10] ) ;
+            colorCode = data[11];
+            switch( colorCode ) {
+                case 2: colorSpace = ColorSpace.YCCK; break;
+                case 1: colorSpace = ColorSpace.YCbCr; break;
+                default: colorSpace = ColorSpace.CMYK; break;
+            }
+        }
+        public static final Adobe get(final byte[] data) throws RuntimeException {
+            if (data[0] == (byte)0x41 && data[1] == (byte)0x64 && data[2] == (byte)0x6F &&
+                data[3] == (byte)0x62 && data[4] == (byte)0x65 && data[5] == (byte)0) { // 'Adobe\x00'
+                final Adobe r = new Adobe(data);
+                return r;
+            } else {
+                return null;
+            }
+        }
+        @Override
+        public final String toString() {
+            return "Adobe[ver "+version+", flags["+toHexString(flags0)+", "+toHexString(flags1)+"], colorSpace/Code "+colorSpace+"/"+toHexString(colorCode)+"]";
+        }
+    }
+    /** TODO */
+    public static class EXIF {
+        private EXIF(final byte data[]) {
+        }
+
+        public static final EXIF get(final byte[] data) throws RuntimeException {
+            if ( data[0] == (byte)0x45 && data[1] == (byte)0x78 && data[2] == (byte)0x69 &&
+                 data[3] == (byte)0x66 && data[4] == (byte)0x0) { // 'Exif\x00'
+                final EXIF r = new EXIF(data);
+                return r;
+            } else {
+                return null;
+            }
+        }
+        @Override
+        public final String toString() {
+            return "EXIF[]";
+        }
+    }
+
+    @SuppressWarnings("serial")
+    public static class CodecException extends RuntimeException {
+        CodecException(String message) {
+            super(message);
+        }
+    }
+    @SuppressWarnings("serial")
+    public static class MarkerException extends CodecException {
+        final int marker;
+        MarkerException(int marker, String message) {
+            super(message+" - Marker "+toHexString(marker));
+            this.marker = marker;
+        }
+        public int getMarker() { return marker; }
+    }
+
+    /** Start of Image */
+    private static final int M_SOI   = 0xFFD8;
+    /** End of Image */
+    private static final int M_EOI   = 0xFFD9;
+    /** Start of Frame - Baseline DCT */
+    private static final int M_SOF0  = 0xFFC0;
+    /** Start of Frame - Extended sequential DCT */
+    // private static final int M_SOF1  = 0xFFC1;
+    /** Start of Frame - Progressive DCT */
+    private static final int M_SOF2  = 0xFFC2;
+    /** DHT (Define Huffman Tables) */
+    private static final int M_DHT   = 0xFFC4;
+    // private static final int M_DAC   = 0xFFCC;
+    /** SOS (Start of Scan) */
+    private static final int M_SOS   = 0xFFDA;
+    /** DQT (Define Quantization Tables) */
+    private static final int M_QTT   = 0xFFDB;
+    /** DRI (Define Restart Interval) */
+    private static final int M_DRI   = 0xFFDD;
+    /** APP0 (Application Specific) - JFIF Header */
+    private static final int M_APP00 = 0xFFE0;
+    /** APP1 (Application Specific) - Exif Header */
+    private static final int M_APP01 = 0xFFE1;
+    /** APP2 (Application Specific) */
+    private static final int M_APP02 = 0xFFE2;
+    /** APP3 (Application Specific) */
+    private static final int M_APP03 = 0xFFE3;
+    /** APP4 (Application Specific) */
+    private static final int M_APP04 = 0xFFE4;
+    /** APP5 (Application Specific) */
+    private static final int M_APP05 = 0xFFE5;
+    /** APP6 (Application Specific) */
+    private static final int M_APP06 = 0xFFE6;
+    /** APP7 (Application Specific) */
+    private static final int M_APP07 = 0xFFE7;
+    /** APP8 (Application Specific) */
+    private static final int M_APP08 = 0xFFE8;
+    /** APP9 (Application Specific) */
+    private static final int M_APP09 = 0xFFE9;
+    /** APP10 (Application Specific) */
+    private static final int M_APP10 = 0xFFEA;
+    /** APP11 (Application Specific) */
+    private static final int M_APP11 = 0xFFEB;
+    /** APP12 (Application Specific) */
+    private static final int M_APP12 = 0xFFEC;
+    /** APP13 (Application Specific) */
+    private static final int M_APP13 = 0xFFED;
+    /** APP14 (Application Specific) - ADOBE Header */
+    private static final int M_APP14 = 0xFFEE;
+    /** APP15 (Application Specific) */
+    private static final int M_APP15 = 0xFFEF;
+
+    /** Annotation / Comment */
+    private static final int M_ANO   = 0xFFFE;
+
+    static final int[] dctZigZag = new int[] {
+        0,
+        1,  8,
+        16,  9,  2,
+        3, 10, 17, 24,
+        32, 25, 18, 11, 4,
+        5, 12, 19, 26, 33, 40,
+        48, 41, 34, 27, 20, 13,  6,
+        7, 14, 21, 28, 35, 42, 49, 56,
+        57, 50, 43, 36, 29, 22, 15,
+        23, 30, 37, 44, 51, 58,
+        59, 52, 45, 38, 31,
+        39, 46, 53, 60,
+        61, 54, 47,
+        55, 62,
+        63
+    };
+
+    static final int dctCos1  =   4017;   // cos(pi/16)
+    static final int dctSin1  =    799;   // sin(pi/16)
+    static final int dctCos3  =   3406;   // cos(3*pi/16)
+    static final int dctSin3  =   2276;   // sin(3*pi/16)
+    static final int dctCos6  =   1567;   // cos(6*pi/16)
+    static final int dctSin6  =   3784;   // sin(6*pi/16)
+    static final int dctSqrt2 =   5793;   // sqrt(2)
+    static final int dctSqrt1d2 = 2896;   // sqrt(2) / 2
+
+    static class Frame {
+        final boolean progressive;
+        final int precision;
+        final int scanLines;
+        final int samplesPerLine;
+        private final ArrayHashSet<Integer> compIDs;
+        private final ComponentIn[] comps;
+        private final int compCount;
+        /** quantization tables */
+        final int[][] qtt;
+        int maxCompID;
+        int maxH;
+        int maxV;
+        int mcusPerLine;
+        int mcusPerColumn;
+
+        Frame(boolean progressive, int precision, int scanLines, int samplesPerLine, int componentsCount, int[][] qtt) {
+            this.progressive = progressive;
+            this.precision = precision;
+            this.scanLines = scanLines;
+            this.samplesPerLine = samplesPerLine;
+            compIDs = new ArrayHashSet<Integer>(componentsCount);
+            comps = new ComponentIn[componentsCount];
+            this.compCount = componentsCount;
+            this.qtt = qtt;
+        }
+
+        private final void checkBounds(int idx) {
+            if( 0 > idx || idx >= compCount ) {
+                throw new CodecException("Idx out of bounds "+idx+", "+this);
+            }
+        }
+        public final void validateComponents() {
+            for(int i=0; i<compCount; i++) {
+                final ComponentIn c = comps[i];
+                if( null == c ) {
+                    throw new CodecException("Component["+i+"] null");
+                }
+                if( null == this.qtt[c.qttIdx] ) {
+                    throw new CodecException("Component["+i+"].qttIdx -> null QTT");
+                }
+            }
+        }
+
+        public final int getCompCount() { return compCount; }
+        public final int getMaxCompID() { return maxCompID; }
+
+        public final void putOrdered(int compID, ComponentIn component) {
+            if( maxCompID < compID ) {
+                maxCompID = compID;
+            }
+            final int idx = compIDs.size();
+            checkBounds(idx);
+            compIDs.add(compID);
+            comps[idx] = component;
+        }
+        public final ComponentIn getCompByIndex(int i) {
+            checkBounds(i);
+            return comps[i];
+        }
+        public final ComponentIn getCompByID(int componentID) {
+            return getCompByIndex( compIDs.indexOf(componentID) );
+        }
+        public final int getCompID(int idx) {
+            return compIDs.get(idx);
+        }
+        public final boolean hasCompID(int componentID) {
+            return compIDs.contains(componentID);
+        }
+        @Override
+        public final String toString() {
+            return "Frame[progressive "+progressive+", precision "+precision+", scanLines "+scanLines+", samplesPerLine "+samplesPerLine+
+                    ", components[count "+compCount+", maxID "+maxCompID+", componentIDs "+compIDs+", comps "+Arrays.asList(comps)+"]]";
+        }
+    }
+
+    /** The JPEG encoded components */
+    class ComponentIn {
+        final int h, v;
+        /** index to frame.qtt[] */
+        final int qttIdx;
+        int blocksPerColumn;
+        int blocksPerColumnForMcu;
+        int blocksPerLine;
+        int blocksPerLineForMcu;
+        /** [blocksPerColumnForMcu][blocksPerLineForMcu][64]; */
+        int[][][] blocks;
+        int pred;
+        BinObj huffmanTableAC;
+        BinObj huffmanTableDC;
+
+        ComponentIn(int h, int v, int qttIdx) {
+            this.h = h;
+            this.v = v;
+            this.qttIdx = qttIdx;
+        }
+
+        public final void allocateBlocks(int blocksPerColumn, int blocksPerColumnForMcu, int blocksPerLine, int blocksPerLineForMcu) {
+            this.blocksPerColumn = blocksPerColumn;
+            this.blocksPerColumnForMcu = blocksPerColumnForMcu;
+            this.blocksPerLine = blocksPerLine;
+            this.blocksPerLineForMcu = blocksPerLineForMcu;
+            this.blocks = new int[blocksPerColumnForMcu][blocksPerLineForMcu][64];
+        }
+        public final int[] getBlock(int row, int col) {
+            if( row >= blocksPerColumnForMcu || col >= blocksPerLineForMcu ) {
+                throw new CodecException("Out of bounds given ["+row+"]["+col+"] - "+this);
+            }
+            return blocks[row][col];
+        }
+
+        @Override
+        public final String toString() {
+            return "CompIn[h "+h+", v "+v+", qttIdx "+qttIdx+", blocks["+blocksPerColumn+", mcu "+blocksPerColumnForMcu+"]["+blocksPerLine+", mcu "+blocksPerLineForMcu+"][64]]";
+        }
+    }
+
+    /** The decoded components */
+    class ComponentOut {
+        private final ArrayList<byte[]> lines;
+        final float scaleX;
+        final float scaleY;
+
+        ComponentOut(ArrayList<byte[]> lines, float scaleX, float scaleY) {
+            this.lines = lines;
+            this.scaleX = scaleX;
+            this.scaleY = scaleY;
+        }
+
+        /** Safely returning a line, if index exceeds number of lines, last line is returned. */
+        public final byte[] getLine(int i) {
+            final int sz = lines.size();
+            return lines.get( i < sz ? i : sz - 1);
+        }
+
+        @Override
+        public final String toString() {
+            return "CompOut[lines "+lines.size()+", scale "+scaleX+"x"+scaleY+"]";
+        }
+    }
+
+    @Override
+    public String toString() {
+        final String jfifS = null != jfif ? jfif.toString() : "JFIF nil";
+        final String exifS = null != exif ? exif.toString() : "Exif nil";
+        final String adobeS = null != adobe ? adobe.toString() : "Adobe nil";
+        final String compOuts = null != components ? Arrays.asList(components).toString() : "nil";
+        return "JPEG[size "+width+"x"+height+", compOut "+compOuts+", "+jfifS+", "+exifS+", "+adobeS+"]";
+    }
+
+    private final Bitstream<InputStream> bstream = new Bitstream<InputStream>(new Bitstream.ByteInputStream(null), false /* outputMode */);
+
+    private int width = 0;
+    private int height = 0;
+    private JFIF jfif = null;
+    private EXIF exif = null;
+    private Adobe adobe = null;
+    private ComponentOut[] components = null;
+
+    public final JFIF getJFIFHeader() { return jfif; }
+    public final EXIF getEXIFHeader() { return exif; }
+    public final Adobe getAdobeHeader() { return adobe; }
+    public final int getWidth() { return width; }
+    public final int getHeight() { return height; }
+
+    private final void setStream(InputStream is) {
+        try {
+            bstream.setStream(is, false /* outputMode */);
+        } catch (Exception e) {
+            throw new RuntimeException(e); // should not happen, no flush()
+        }
+    }
+
+    private final int readUInt8() throws IOException {
+        return bstream.readUInt8(true /* msbFirst */);
+    }
+
+    private final int readUInt16() throws IOException {
+        return bstream.readUInt16(true /* msbFirst */, true /* bigEndian */);
+    }
+
+    private final int readNumber() throws IOException {
+        final int len=readUInt16();
+        if(len!=4){
+            throw new CodecException("ERROR: Define number format error [Len!=4, but "+len+"]");
+        }
+        return readUInt16();
+    }
+
+    private final byte[] readDataBlock() throws IOException {
+        int count=0, i=0;
+        final int len=readUInt16();   count+=2;
+        byte[] data = new byte[len-2];
+        while(count<len){
+            data[i++] = (byte)readUInt8(); count++;
+        }
+        if(DEBUG_IN) { System.err.println("JPEG.readDataBlock: net-len "+(len-2)+", "+this); dumpData(data, 0, len-2); }
+        return data;
+    }
+    static final void dumpData(byte[] data, int offset, int len) {
+        for(int i=0; i<len; ) {
+            System.err.print(i%8+": ");
+            for(int j=0; j<8 && i<len; j++, i++) {
+                System.err.print(toHexString(0x000000FF & data[offset+i])+", ");
+            }
+            System.err.println("");
+        }
+    }
+
+    public synchronized void clear(InputStream inputStream) {
+        setStream(inputStream);
+        width = 0;
+        height = 0;
+        jfif = null;
+        exif = null;
+        adobe = null;
+        components = null;
+    }
+    public synchronized JPEGDecoder parse(final InputStream inputStream) throws IOException {
+        clear(inputStream);
+
+        final int[][] quantizationTables = new int[0x0F][]; // 4 bits
+        final BinObj[] huffmanTablesAC = new BinObj[0x0F]; // Huffman table spec - 4 bits
+        final BinObj[] huffmanTablesDC = new BinObj[0x0F]; // Huffman table spec - 4 bits
+        // final ArrayList<Frame> frames = new ArrayList<Frame>(); // JAU: max 1-frame
+
+        Frame frame = null;
+        int resetInterval = 0;
+        int fileMarker = readUInt16();
+        if ( fileMarker != M_SOI ) {
+            throw new CodecException("SOI not found, but has marker "+toHexString(fileMarker));
+        }
+
+        fileMarker = readUInt16();
+        while (fileMarker != M_EOI) {
+            if(DEBUG) { System.err.println("JPG.parse got marker "+toHexString(fileMarker)); }
+            switch(fileMarker) {
+            case M_APP00:
+            case M_APP01:
+            case M_APP02:
+            case M_APP03:
+            case M_APP04:
+            case M_APP05:
+            case M_APP06:
+            case M_APP07:
+            case M_APP08:
+            case M_APP09:
+            case M_APP10:
+            case M_APP11:
+            case M_APP12:
+            case M_APP13:
+            case M_APP14:
+            case M_APP15:
+            case M_ANO: {
+                final byte[] appData = readDataBlock();
+
+                if ( fileMarker == M_APP00 ) {
+                    jfif = JFIF.get( appData );
+                }
+                if ( fileMarker == M_APP01 ) {
+                    exif = EXIF.get(appData);
+                }
+                if (fileMarker == M_APP14) {
+                    adobe = Adobe.get(appData);
+                }
+                fileMarker = 0; // consumed and get-next
+            }
+            break;
+
+            case M_QTT: {
+                int count = 0;
+                final int quantizationTablesLength = readUInt16(); count+=2;
+                while( count < quantizationTablesLength ) {
+                    final int quantizationTableSpec = readUInt8(); count++;
+                    final int precisionID = quantizationTableSpec >> 4;
+                    final int tableIdx = quantizationTableSpec & 0x0F;
+                    final int[] tableData = new int[64];
+                    if ( precisionID == 0 ) { // 8 bit values
+                        for (int j = 0; j < 64; j++) {
+                            final int z = dctZigZag[j];
+                            tableData[z] = readUInt8(); count++;
+                        }
+                    } else if ( precisionID == 1) { //16 bit
+                        for (int j = 0; j < 64; j++) {
+                            final int z = dctZigZag[j];
+                            tableData[z] = readUInt16(); count+=2;
+                        }
+                    } else {
+                        throw new CodecException("DQT: invalid table precision "+precisionID+", quantizationTableSpec "+quantizationTableSpec+", idx "+tableIdx);
+                    }
+                    quantizationTables[tableIdx] = tableData;
+                    if( DEBUG ) {
+                        System.err.println("JPEG.parse.QTT["+tableIdx+"]: spec "+quantizationTableSpec+", precision "+precisionID+", data "+count+"/"+quantizationTablesLength);
+                    }
+                }
+                if(count!=quantizationTablesLength){
+                    throw new CodecException("ERROR: QTT format error [count!=Length]: "+count+"/"+quantizationTablesLength);
+                }
+                fileMarker = 0; // consumed and get-next
+            }
+            break;
+
+            case M_SOF0:
+            case M_SOF2: {
+                if( null != frame ) { // JAU: max 1-frame
+                    throw new CodecException("only single frame JPEGs supported");
+                }
+                int count = 0;
+                final int sofLen = readUInt16(); count+=2; // header length;
+                final int componentsCount;
+                {
+                    final boolean progressive = (fileMarker == M_SOF2);
+                    final int precision = readUInt8(); count++;
+                    final int scanLines = readUInt16(); count+=2;
+                    final int samplesPerLine = readUInt16(); count+=2;
+                    componentsCount = readUInt8(); count++;
+                    frame = new Frame(progressive, precision, scanLines, samplesPerLine, componentsCount, quantizationTables);
+                    width = frame.samplesPerLine;
+                    height = frame.scanLines;
+                }
+                for (int i = 0; i < componentsCount; i++) {
+                    final int componentId = readUInt8(); count++;
+                    final int temp = readUInt8(); count++;
+                    final int h = temp >> 4;
+                    final int v = temp & 0x0F;
+                    final int qttIdx = readUInt8(); count++;
+                    final ComponentIn compIn = new ComponentIn(h, v, qttIdx);
+                    frame.putOrdered(componentId, compIn);
+                }
+                if(count!=sofLen){
+                    throw new CodecException("ERROR: SOF format error [count!=Length]");
+                }
+                prepareComponents(frame);
+                // frames.add(frame); // JAU: max 1-frame
+                if(DEBUG) { System.err.println("JPG.parse.SOF[02]: Got frame "+frame); }
+                fileMarker = 0; // consumed and get-next
+            }
+            break;
+
+            case M_DHT: {
+                int count = 0;
+                final int huffmanLength = readUInt16(); count+=2;
+                int i=count, codeLengthTotal = 0;
+                while( i < huffmanLength ) {
+                    final int huffmanTableSpec = readUInt8(); count++;
+                    final int[] codeLengths = new int[16];
+                    int codeLengthSum = 0;
+                    for (int j = 0; j < 16; j++) {
+                        codeLengthSum += (codeLengths[j] = readUInt8()); count++;
+                    }
+                    final byte[] huffmanValues = new byte[codeLengthSum];
+                    for (int j = 0; j < codeLengthSum; j++) {
+                        huffmanValues[j] = (byte)readUInt8(); count++;
+                    }
+                    codeLengthTotal += codeLengthSum;
+                    i += 17 + codeLengthSum;
+                    final BinObj[] table = ( huffmanTableSpec >> 4 ) == 0 ? huffmanTablesDC : huffmanTablesAC;
+                    table[huffmanTableSpec & 0x0F] = buildHuffmanTable(codeLengths, huffmanValues);
+                }
+                if(count!=huffmanLength || i!=count){
+                    throw new CodecException("ERROR: Huffman table format error [count!=Length]");
+                }
+                if(DEBUG) { System.err.println("JPG.parse.DHT: Got Huffman CodeLengthTotal "+codeLengthTotal); }
+                fileMarker = 0; // consumed and get-next
+            }
+            break;
+
+            case M_DRI:
+                resetInterval = readNumber();
+                if(DEBUG) { System.err.println("JPG.parse.DRI: Got Reset Interval "+resetInterval); }
+                fileMarker = 0; // consumed and get-next
+                break;
+
+            case M_SOS: {
+                int count = 0;
+                final int sosLen = readUInt16(); count+=2;
+                final int selectorsCount = readUInt8(); count++;
+                ArrayList<ComponentIn> components = new ArrayList<ComponentIn>();
+                if(DEBUG) { System.err.println("JPG.parse.SOS: selectorCount [0.."+(selectorsCount-1)+"]: "+frame); }
+                for (int i = 0; i < selectorsCount; i++) {
+                    final int compID = readUInt8(); count++;
+                    final ComponentIn component = frame.getCompByID(compID);
+                    final int tableSpec = readUInt8(); count++;
+                    component.huffmanTableDC = huffmanTablesDC[tableSpec >> 4];
+                    component.huffmanTableAC = huffmanTablesAC[tableSpec & 15];
+                    components.add(component);
+                }
+                final int spectralStart = readUInt8(); count++;
+                final int spectralEnd = readUInt8(); count++;
+                final int successiveApproximation = readUInt8(); count++;
+                if(count!=sosLen){
+                    throw new CodecException("ERROR: scan header format error [count!=Length]");
+                }
+                fileMarker = decoder.decodeScan(frame, components, resetInterval,
+                                                spectralStart, spectralEnd,
+                                                successiveApproximation >> 4, successiveApproximation & 15);
+                if(DEBUG) { System.err.println("JPG.parse.SOS.decode result "+toHexString(fileMarker)); }
+            }
+            break;
+            default:
+                /**
+                if (data[offset - 3] == 0xFF &&
+                data[offset - 2] >= 0xC0 && data[offset - 2] <= 0xFE) {
+                    // could be incorrect encoding -- last 0xFF byte of the previous
+                    // block was eaten by the encoder
+                    offset -= 3;
+                    break;
+                } */
+                throw new CodecException("unknown JPEG marker " + toHexString(fileMarker) + ", " + bstream);
+            }
+            if( 0 == fileMarker ) {
+                fileMarker = readUInt16();
+            }
+        }
+        if(DEBUG) { System.err.println("JPG.parse.2: End of parsing input "+this); }
+        /** // JAU: max 1-frame
+        if ( frames.size() != 1 ) {
+            throw new CodecException("only single frame JPEGs supported "+this);
+        } */
+        if( null == frame ) {
+            throw new CodecException("no single frame found in stream "+this);
+        }
+        frame.validateComponents();
+
+        final int compCount = frame.getCompCount();
+        this.components = new ComponentOut[compCount];
+        for (int i = 0; i < compCount; i++) {
+            final ComponentIn component = frame.getCompByIndex(i);
+            // System.err.println("JPG.parse.buildComponentData["+i+"]: "+component); // JAU
+            // System.err.println("JPG.parse.buildComponentData["+i+"]: "+frame); // JAU
+            this.components[i] = new ComponentOut( output.buildComponentData(frame, component),
+                                                   (float)component.h / (float)frame.maxH,
+                                                   (float)component.v / (float)frame.maxV );
+        }
+        if(DEBUG) { System.err.println("JPG.parse.X: End of processing input "+this); }
+        return this;
+    }
+
+    private void prepareComponents(Frame frame) {
+        int maxH = 0, maxV = 0;
+        // for (componentId in frame.components) {
+        final int compCount = frame.getCompCount();
+        for (int i=0; i<compCount; i++) {
+            final ComponentIn component = frame.getCompByIndex(i);
+            if (maxH < component.h) maxH = component.h;
+            if (maxV < component.v) maxV = component.v;
+        }
+        int mcusPerLine = (int) Math.ceil(frame.samplesPerLine / 8f / maxH);
+        int mcusPerColumn = (int) Math.ceil(frame.scanLines / 8f / maxV);
+        // for (componentId in frame.components) {
+        for (int i=0; i<compCount; i++) {
+            final ComponentIn component = frame.getCompByIndex(i);
+            final int blocksPerLine = (int) Math.ceil(Math.ceil(frame.samplesPerLine / 8f) * component.h / maxH);
+            final int blocksPerColumn = (int) Math.ceil(Math.ceil(frame.scanLines  / 8f) * component.v / maxV);
+            final int blocksPerLineForMcu = mcusPerLine * component.h;
+            final int blocksPerColumnForMcu = mcusPerColumn * component.v;
+            component.allocateBlocks(blocksPerColumn, blocksPerColumnForMcu, blocksPerLine, blocksPerLineForMcu);
+        }
+        frame.maxH = maxH;
+        frame.maxV = maxV;
+        frame.mcusPerLine = mcusPerLine;
+        frame.mcusPerColumn = mcusPerColumn;
+    }
+
+    private static class BinObjIdxed {
+        final BinObj children;
+        byte index;
+        BinObjIdxed() {
+            this.children = new BinObj();
+            this.index = 0;
+        }
+    }
+    private static class BinObj {
+        final boolean isValue;
+        final BinObj[] tree;
+        final byte b;
+
+        BinObj(byte b) {
+            this.isValue= true;
+            this.b = b;
+            this.tree = null;
+        }
+        BinObj() {
+            this.isValue= false;
+            this.b = (byte)0;
+            this.tree = new BinObj[2];
+        }
+        final byte getValue() { return b; }
+        final BinObj get(int i) { return tree[i]; }
+        final void set(byte i, byte v) { tree[i] = new BinObj(v); }
+        final void set(byte i, BinObj v) { tree[i] = v; }
+    }
+
+    private BinObj buildHuffmanTable(int[] codeLengths, byte[] values) {
+        int k = 0;
+        int length = 16;
+        final ArrayList<BinObjIdxed> code = new ArrayList<BinObjIdxed>();
+        while (length > 0 && 0==codeLengths[length - 1]) {
+            length--;
+        }
+        code.add(new BinObjIdxed());
+        BinObjIdxed p = code.get(0), q;
+        for (int i = 0; i < length; i++) {
+            for (int j = 0; j < codeLengths[i]; j++) {
+                p = code.remove(code.size()-1);
+                p.children.set(p.index, values[k]);
+                while (p.index > 0) {
+                    p = code.remove(code.size()-1);
+                }
+                p.index++;
+                code.add(p);
+                while (code.size() <= i) {
+                    q = new BinObjIdxed();
+                    code.add(q);
+                    p.children.set(p.index, q.children);
+                    p = q;
+                }
+                k++;
+            }
+            if (i + 1 < length) {
+                // p here points to last code
+                q = new BinObjIdxed();
+                code.add(q);
+                p.children.set(p.index, q.children);
+                p = q;
+            }
+        }
+        return code.get(0).children;
+    }
+
+    private final Output output = new Output();
+    private static class Output {
+        private int blocksPerLine;
+        private int blocksPerColumn;
+        private int samplesPerLine;
+
+        private ArrayList<byte[]> buildComponentData(Frame frame, ComponentIn component) {
+            ArrayList<byte[]> lines = new ArrayList<byte[]>();
+            blocksPerLine = component.blocksPerLine;
+            blocksPerColumn = component.blocksPerColumn;
+            samplesPerLine = blocksPerLine << 3;
+            final int[] R = new int[64];
+            final byte[] r = new byte[64];
+
+            for (int blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
+                final int scanLine = blockRow << 3;
+                // System.err.println("JPG.buildComponentData: row "+blockRow+"/"+blocksPerColumn+" -> scanLine "+scanLine); // JAU
+                for (int i = 0; i < 8; i++) {
+                    lines.add(new byte[samplesPerLine]);
+                }
+                for (int blockCol = 0; blockCol < blocksPerLine; blockCol++) {
+                    // System.err.println("JPG.buildComponentData: col "+blockCol+"/"+blocksPerLine+", comp.qttIdx "+component.qttIdx+", qtt "+frame.qtt[component.qttIdx]); // JAU
+                    quantizeAndInverse(component.getBlock(blockRow, blockCol), r, R, frame.qtt[component.qttIdx]);
+
+                    final int sample = blockCol << 3;
+                    int offset = 0;
+                    for (int j = 0; j < 8; j++) {
+                        final byte[] line = lines.get(scanLine + j);
+                        for (int i = 0; i < 8; i++)
+                            line[sample + i] = r[offset++];
+                    }
+                }
+            }
+            return lines;
+        }
+
+        // A port of poppler's IDCT method which in turn is taken from:
+        //   Christoph Loeffler, Adriaan Ligtenberg, George S. Moschytz,
+        //   "Practical Fast 1-D DCT Algorithms with 11 Multiplications",
+        //   IEEE Intl. Conf. on Acoustics, Speech & Signal Processing, 1989,
+        //   988-991.
+        private void quantizeAndInverse(int[] zz, byte[] dataOut, int[] dataIn, int[] qt) {
+            int v0, v1, v2, v3, v4, v5, v6, v7, t;
+            int[] p = dataIn;
+            int i;
+
+            // dequant
+            for (i = 0; i < 64; i++) {
+                p[i] = zz[i] * qt[i];
+            }
+
+            // inverse DCT on rows
+            for (i = 0; i < 8; ++i) {
+                int row = 8 * i;
+
+                // check for all-zero AC coefficients
+                if (p[1 + row] == 0 && p[2 + row] == 0 && p[3 + row] == 0 &&
+                        p[4 + row] == 0 && p[5 + row] == 0 && p[6 + row] == 0 &&
+                        p[7 + row] == 0) {
+                    t = (dctSqrt2 * p[0 + row] + 512) >> 10;
+                    p[0 + row] = t;
+                    p[1 + row] = t;
+                    p[2 + row] = t;
+                    p[3 + row] = t;
+                    p[4 + row] = t;
+                    p[5 + row] = t;
+                    p[6 + row] = t;
+                    p[7 + row] = t;
+                    continue;
+                }
+
+                // stage 4
+                v0 = (dctSqrt2 * p[0 + row] + 128) >> 8;
+                        v1 = (dctSqrt2 * p[4 + row] + 128) >> 8;
+                v2 = p[2 + row];
+                v3 = p[6 + row];
+                v4 = (dctSqrt1d2 * (p[1 + row] - p[7 + row]) + 128) >> 8;
+                v7 = (dctSqrt1d2 * (p[1 + row] + p[7 + row]) + 128) >> 8;
+                v5 = p[3 + row] << 4;
+                v6 = p[5 + row] << 4;
+
+                // stage 3
+                t = (v0 - v1+ 1) >> 1;
+                v0 = (v0 + v1 + 1) >> 1;
+                v1 = t;
+                t = (v2 * dctSin6 + v3 * dctCos6 + 128) >> 8;
+                v2 = (v2 * dctCos6 - v3 * dctSin6 + 128) >> 8;
+                v3 = t;
+                t = (v4 - v6 + 1) >> 1;
+                v4 = (v4 + v6 + 1) >> 1;
+                v6 = t;
+                t = (v7 + v5 + 1) >> 1;
+                v5 = (v7 - v5 + 1) >> 1;
+                v7 = t;
+
+                // stage 2
+                t = (v0 - v3 + 1) >> 1;
+                v0 = (v0 + v3 + 1) >> 1;
+                v3 = t;
+                t = (v1 - v2 + 1) >> 1;
+                v1 = (v1 + v2 + 1) >> 1;
+                v2 = t;
+                t = (v4 * dctSin3 + v7 * dctCos3 + 2048) >> 12;
+                v4 = (v4 * dctCos3 - v7 * dctSin3 + 2048) >> 12;
+                v7 = t;
+                t = (v5 * dctSin1 + v6 * dctCos1 + 2048) >> 12;
+                v5 = (v5 * dctCos1 - v6 * dctSin1 + 2048) >> 12;
+                v6 = t;
+
+                // stage 1
+                p[0 + row] = v0 + v7;
+                p[7 + row] = v0 - v7;
+                p[1 + row] = v1 + v6;
+                p[6 + row] = v1 - v6;
+                p[2 + row] = v2 + v5;
+                p[5 + row] = v2 - v5;
+                p[3 + row] = v3 + v4;
+                p[4 + row] = v3 - v4;
+            }
+
+            // inverse DCT on columns
+            for (i = 0; i < 8; ++i) {
+                int col = i;
+
+                // check for all-zero AC coefficients
+                if (p[1*8 + col] == 0 && p[2*8 + col] == 0 && p[3*8 + col] == 0 &&
+                        p[4*8 + col] == 0 && p[5*8 + col] == 0 && p[6*8 + col] == 0 &&
+                        p[7*8 + col] == 0) {
+                    t = (dctSqrt2 * dataIn[i+0] + 8192) >> 14;
+                    p[0*8 + col] = t;
+                    p[1*8 + col] = t;
+                    p[2*8 + col] = t;
+                    p[3*8 + col] = t;
+                    p[4*8 + col] = t;
+                    p[5*8 + col] = t;
+                    p[6*8 + col] = t;
+                    p[7*8 + col] = t;
+                    continue;
+                }
+
+                // stage 4
+                v0 = (dctSqrt2 * p[0*8 + col] + 2048) >> 12;
+                v1 = (dctSqrt2 * p[4*8 + col] + 2048) >> 12;
+                v2 = p[2*8 + col];
+                v3 = p[6*8 + col];
+                v4 = (dctSqrt1d2 * (p[1*8 + col] - p[7*8 + col]) + 2048) >> 12;
+                v7 = (dctSqrt1d2 * (p[1*8 + col] + p[7*8 + col]) + 2048) >> 12;
+                v5 = p[3*8 + col];
+                v6 = p[5*8 + col];
+
+                // stage 3
+                t = (v0 - v1 + 1) >> 1;
+                v0 = (v0 + v1 + 1) >> 1;
+                v1 = t;
+                t = (v2 * dctSin6 + v3 * dctCos6 + 2048) >> 12;
+                v2 = (v2 * dctCos6 - v3 * dctSin6 + 2048) >> 12;
+                v3 = t;
+                t = (v4 - v6 + 1) >> 1;
+                v4 = (v4 + v6 + 1) >> 1;
+                v6 = t;
+                t = (v7 + v5 + 1) >> 1;
+                v5 = (v7 - v5 + 1) >> 1;
+                v7 = t;
+
+                // stage 2
+                t = (v0 - v3 + 1) >> 1;
+                v0 = (v0 + v3 + 1) >> 1;
+                v3 = t;
+                t = (v1 - v2 + 1) >> 1;
+                v1 = (v1 + v2 + 1) >> 1;
+                v2 = t;
+                t = (v4 * dctSin3 + v7 * dctCos3 + 2048) >> 12;
+                v4 = (v4 * dctCos3 - v7 * dctSin3 + 2048) >> 12;
+                v7 = t;
+                t = (v5 * dctSin1 + v6 * dctCos1 + 2048) >> 12;
+                v5 = (v5 * dctCos1 - v6 * dctSin1 + 2048) >> 12;
+                v6 = t;
+
+                // stage 1
+                p[0*8 + col] = v0 + v7;
+                p[7*8 + col] = v0 - v7;
+                p[1*8 + col] = v1 + v6;
+                p[6*8 + col] = v1 - v6;
+                p[2*8 + col] = v2 + v5;
+                p[5*8 + col] = v2 - v5;
+                p[3*8 + col] = v3 + v4;
+                p[4*8 + col] = v3 - v4;
+            }
+
+            // convert to 8-bit integers
+            for (i = 0; i < 64; ++i) {
+                int sample = 128 + ((p[i] + 8) >> 4);
+                dataOut[i] = (byte) ( sample < 0 ? 0 : sample > 0xFF ? 0xFF : sample );
+            }
+        }
+    }
+
+    private static interface DecoderFunction {
+        void decode(ComponentIn component, int[] zz) throws IOException;
+    }
+
+    private class Decoder {
+        // private int precision;
+        // private int samplesPerLine;
+        // private int scanLines;
+        private int mcusPerLine;
+        private boolean progressive;
+        // private int maxH, maxV;
+        private int spectralStart, spectralEnd;
+        private int successive;
+        private int eobrun;
+        private int successiveACState, successiveACNextValue;
+
+        private int decodeScan(Frame frame, ArrayList<ComponentIn> components, int resetInterval,
+                int spectralStart, int spectralEnd, int successivePrev, int successive) throws IOException {
+            // this.precision = frame.precision;
+            // this.samplesPerLine = frame.samplesPerLine;
+            // this.scanLines = frame.scanLines;
+            this.mcusPerLine = frame.mcusPerLine;
+            this.progressive = frame.progressive;
+            // this.maxH = frame.maxH;
+            // this.maxV = frame.maxV;
+            bstream.skip( bstream.getBitCount() ); // align to next byte
+            this.spectralStart = spectralStart;
+            this.spectralEnd = spectralEnd;
+            this.successive = successive;
+
+            final int componentsLength = components.size();
+
+            final DecoderFunction decodeFn;
+            if (progressive) {
+                if (spectralStart == 0) {
+                    decodeFn = successivePrev == 0 ? decodeDCFirst : decodeDCSuccessive;
+                } else {
+                    decodeFn = successivePrev == 0 ? decodeACFirst : decodeACSuccessive;
+                }
+            } else {
+                decodeFn = decodeBaseline;
+            }
+
+            int mcu = 0;
+            int mcuExpected;
+            if (componentsLength == 1) {
+                final ComponentIn c = components.get(0);
+                mcuExpected = c.blocksPerLine * c.blocksPerColumn;
+            } else {
+                mcuExpected = mcusPerLine * frame.mcusPerColumn;
+            }
+            if (0 == resetInterval) {
+                resetInterval = mcuExpected;
+            }
+            if(DEBUG) {
+                System.err.println("JPEG.decodeScan.1 resetInterval "+resetInterval+", mcuExpected "+mcuExpected+", sA "+spectralStart+", sP "+successivePrev+", sE "+spectralEnd+", suc "+successive+", decodeFn "+decodeFn.getClass().getSimpleName());
+            }
+            int marker = 0;
+            while ( /* untilMarker || */ mcu < mcuExpected) {
+                // reset interval stuff
+                for (int i = 0; i < componentsLength; i++) {
+                    components.get(i).pred = 0;
+                }
+                eobrun = 0;
+
+                try {
+                    if (componentsLength == 1) {
+                        final ComponentIn component = components.get(0);
+                        for (int n = 0; n < resetInterval; n++) {
+                            decodeBlock(component, decodeFn, mcu);
+                            mcu++;
+                        }
+                    } else {
+                        for (int n = 0; n < resetInterval; n++) {
+                            for (int i = 0; i < componentsLength; i++) {
+                                final ComponentIn component = components.get(i);
+                                final int h = component.h;
+                                final int v = component.v;
+                                for (int j = 0; j < v; j++) {
+                                    for (int k = 0; k < h; k++) {
+                                        decodeMcu(component, decodeFn, mcu, j, k);
+                                    }
+                                }
+                            }
+                            mcu++;
+                        }
+                    }
+                } catch (MarkerException markerException) {
+                    if(DEBUG) { System.err.println("JPEG.decodeScan: Marker exception: "+markerException.getMessage()); markerException.printStackTrace(); }
+                    return markerException.getMarker();
+                } catch (CodecException codecException) {
+                    if(DEBUG) { System.err.println("JPEG.decodeScan: Codec exception: "+codecException.getMessage()); codecException.printStackTrace(); }
+                    bstream.skip( bstream.getBitCount() ); // align to next byte
+                    return M_EOI; // force end !
+                }
+
+                // find marker
+                bstream.skip( bstream.getBitCount() ); // align to next byte
+                bstream.mark(2);
+                marker = readUInt16();
+                if( marker < 0xFF00 ) {
+                    bstream.reset();
+                    throw new CodecException("marker not found @ mcu "+mcu+"/"+mcuExpected+", u16: "+toHexString(marker));
+                }
+                final boolean isRSTx = 0xFFD0 <= marker && marker <= 0xFFD7; // !RSTx
+                if(DEBUG) {
+                    System.err.println("JPEG.decodeScan: MCUs "+mcu+"/"+mcuExpected+", u16 "+toHexString(marker)+", RSTx "+isRSTx+", "+frame);
+                }
+                if ( !isRSTx ) {
+                    break; // handle !RSTx marker in caller
+                }
+            }
+            return marker;
+        }
+
+        private final int readBit() throws MarkerException, IOException {
+            final int bit = bstream.readBit(true /* msbFirst */);
+            if( Bitstream.EOS == bit || 7 != bstream.getBitCount() ) {
+                return bit;
+            }
+            // new byte read, i.e. bitCount == 7
+            final int bitsData = bstream.getBitBuffer(); // peek for marker
+            if ( 0xFF == bitsData ) { // marker prefix
+                final int nextByte = bstream.getStream().read(); // snoop marker signature, will be dropped!
+                if( -1 == nextByte ) {
+                    throw new CodecException("marked prefix 0xFF, then EOF");
+                }
+                if (0 != nextByte) {
+                    final int marker = (bitsData << 8) | nextByte;
+                    throw new MarkerException(marker, "Marker at readBit pos " + bstream);
+                }
+                // unstuff 0
+            }
+            return bit;
+        }
+
+        private int decodeHuffman(BinObj tree) throws IOException {
+            BinObj node = tree;
+            int bit;
+            while ( ( bit = readBit() ) != -1 ) {
+                node = node.get(bit);
+                if ( node.isValue ) {
+                    return 0x000000FF & node.getValue();
+                }
+            }
+            throw new CodecException("EOF reached at "+bstream);
+        }
+        private int receive(int length) throws IOException {
+            int n = 0;
+            while (length > 0) {
+                final int bit = readBit();
+                if (bit == -1) {
+                    return -1;
+                }
+                n = (n << 1) | bit;
+                length--;
+            }
+            return n;
+        }
+        private int receiveAndExtend(int length) throws IOException {
+            final int n = receive(length);
+            if (n >= 1 << (length - 1)) {
+                return n;
+            }
+            return n + (-1 << length) + 1;
+        }
+
+        final DecoderFunction decodeBaseline = new BaselineDecoder();
+        final DecoderFunction decodeDCFirst = new DCFirstDecoder();
+        final DecoderFunction decodeDCSuccessive = new DCSuccessiveDecoder();
+        final DecoderFunction decodeACFirst = new ACFirstDecoder();
+        final DecoderFunction decodeACSuccessive = new ACSuccessiveDecoder();
+
+        class BaselineDecoder implements DecoderFunction {
+            @Override
+            public void decode(ComponentIn component, int[] zz) throws IOException {
+                final int t = decodeHuffman(component.huffmanTableDC);
+                final int diff = ( t == 0 ) ? 0 : receiveAndExtend(t);
+                zz[0] = ( component.pred += diff );
+                int k = 1;
+                while (k < 64) {
+                    final int rs = decodeHuffman(component.huffmanTableAC);
+                    final int s = rs & 15, r = rs >> 4;
+                    if (s == 0) {
+                        if (r < 15) {
+                            break;
+                        }
+                        k += 16;
+                        continue;
+                    }
+                    k += r;
+                    final int z = dctZigZag[k];
+                    zz[z] = receiveAndExtend(s);
+                    k++;
+                }
+            }
+        }
+        class DCFirstDecoder implements DecoderFunction {
+            @Override
+            public void decode(ComponentIn component, int[] zz) throws IOException {
+                final int t = decodeHuffman(component.huffmanTableDC);
+                final int diff = ( t == 0 ) ? 0 : (receiveAndExtend(t) << successive);
+                zz[0] = ( component.pred += diff );
+            }
+        }
+        class DCSuccessiveDecoder implements DecoderFunction {
+            @Override
+            public void decode(ComponentIn component, int[] zz) throws IOException {
+                zz[0] |= readBit() << successive;
+            }
+        }
+
+        class ACFirstDecoder implements DecoderFunction {
+            @Override
+            public void decode(ComponentIn component, int[] zz) throws IOException {
+                if (eobrun > 0) {
+                    eobrun--;
+                    return;
+                }
+                int k = spectralStart, e = spectralEnd;
+                while (k <= e) {
+                    final int rs = decodeHuffman(component.huffmanTableAC);
+                    final int s = rs & 15, r = rs >> 4;
+                    if (s == 0) {
+                        if (r < 15) {
+                            eobrun = receive(r) + (1 << r) - 1;
+                            break;
+                        }
+                        k += 16;
+                        continue;
+                    }
+                    k += r;
+                    final int z = dctZigZag[k];
+                    zz[z] = receiveAndExtend(s) * (1 << successive);
+                    k++;
+                }
+            }
+        }
+        class ACSuccessiveDecoder implements DecoderFunction {
+            @Override
+            public void decode(ComponentIn component, int[] zz) throws IOException {
+                int k = spectralStart, e = spectralEnd, r = 0;
+                while (k <= e) {
+                    final int z = dctZigZag[k];
+                    switch (successiveACState) {
+                    case 0: // initial state
+                        final int rs = decodeHuffman(component.huffmanTableAC);
+                        final int s = rs & 15;
+                        r = rs >> 4;
+                        if (s == 0) {
+                            if (r < 15) {
+                                eobrun = receive(r) + (1 << r);
+                                successiveACState = 4;
+                            } else {
+                                r = 16;
+                                successiveACState = 1;
+                            }
+                        } else {
+                            // if (s !== 1) {
+                            if (s != 1) {
+                                throw new CodecException("invalid ACn encoding");
+                            }
+                            successiveACNextValue = receiveAndExtend(s);
+                            successiveACState = r != 0 ? 2 : 3;
+                        }
+                        continue;
+                    case 1: // skipping r zero items
+                    case 2:
+                        if ( zz[z] != 0 ) {
+                            zz[z] += (readBit() << successive);
+                        } else {
+                            r--;
+                            if (r == 0) {
+                                successiveACState = successiveACState == 2 ? 3 : 0;
+                            }
+                        }
+                        break;
+                    case 3: // set value for a zero item
+                        if ( zz[z] != 0 ) {
+                            zz[z] += (readBit() << successive);
+                        } else {
+                            zz[z] = successiveACNextValue << successive;
+                            successiveACState = 0;
+                        }
+                        break;
+                    case 4: // eob
+                        if ( zz[z] != 0 ) {
+                            zz[z] += (readBit() << successive);
+                        }
+                        break;
+                        }
+                        k++;
+                    }
+                    if (successiveACState == 4) {
+                        eobrun--;
+                        if (eobrun == 0) {
+                            successiveACState = 0;
+                        }
+                    }
+            }
+        }
+        void decodeMcu(ComponentIn component, DecoderFunction decoder, int mcu, int row, int col) throws IOException {
+            final int mcuRow = (mcu / mcusPerLine) | 0;
+            final int mcuCol = mcu % mcusPerLine;
+            final int blockRow = mcuRow * component.v + row;
+            final int blockCol = mcuCol * component.h + col;
+            decoder.decode(component, component.getBlock(blockRow, blockCol));
+        }
+        void decodeBlock(ComponentIn component, DecoderFunction decoder, int mcu) throws IOException {
+            final int blockRow = (mcu / component.blocksPerLine) | 0;
+            final int blockCol = mcu % component.blocksPerLine;
+            decoder.decode(component, component.getBlock(blockRow, blockCol));
+        }
+    }
+
+    private final Decoder decoder = new Decoder();
+
+    /** wrong color space ..
+    private final void storeYCbCr2BGR(final PixelStorage pixelStorage, int x, int y, int Y, final int Cb, final int Cr)
+    {
+        if(Y<0) Y=0;
+        int B = Y + ( ( 116130 * Cb ) >> 16 ) ;
+        if(B<0) B=0;
+        else if(B>255) B=255;
+
+        int G = Y - ( ( 22554 * Cb + 46802 * Cr ) >> 16 ) ;
+        if(G<0) G=0;
+        else if(G>255) G=255;
+
+        int R = Y + ( ( 91881 * Cr ) >> 16 );
+        if(R<0) R=0;
+        else if(R>255) R=255;
+
+        pixelStorage.storeRGB(x, y, (byte)R, (byte)G, (byte)B);
+    } */
+
+    public synchronized void getPixel(JPEGDecoder.ColorSink pixelStorage, int width, int height) {
+        final int scaleX = this.width / width, scaleY = this.height / height;
+
+        final int componentCount = this.components.length;
+        final ColorSpace sourceCS = ( null != adobe ) ? adobe.colorSpace : ColorSpace.YCbCr;
+        final ColorSpace storageCS = pixelStorage.allocate(width, height, sourceCS, componentCount);
+        if( ColorSpace.RGB != storageCS && ColorSpace.YCbCr != storageCS ) {
+            throw new IllegalArgumentException("Unsupported storage color space: "+storageCS);
+        }
+
+        switch (componentCount) {
+        case 1: {
+            // Grayscale
+            final ComponentOut component1 = this.components[0];
+            for (int y = 0; y < height; y++) {
+                final byte[] component1Line = component1.getLine((int)(y * component1.scaleY * scaleY));
+                for (int x = 0; x < width; x++) {
+                    final byte Y = component1Line[(int)(x * component1.scaleX * scaleX)];
+                    if( ColorSpace.YCbCr == storageCS ) {
+                        pixelStorage.storeYCbCr(x, y, Y, (byte)0, (byte)0);
+                    } else {
+                        pixelStorage.storeRGB(x, y, Y, Y, Y);
+                    }
+                }
+            }
+        }
+        break;
+        case 2: {
+            // PDF might compress two component data in custom colorspace
+            final ComponentOut component1 = this.components[0];
+            final ComponentOut component2 = this.components[1];
+            for (int y = 0; y < height; y++) {
+                final int ys = y * scaleY;
+                final byte[] component1Line = component1.getLine((int)(ys * component1.scaleY));
+                final byte[] component2Line = component1.getLine((int)(ys * component2.scaleY));
+                for (int x = 0; x < width; x++) {
+                    final int xs = x * scaleX;
+                    final byte Y1 = component1Line[(int)(xs * component1.scaleX)];
+                    final byte Y2 = component2Line[(int)(xs * component2.scaleX)];
+                    pixelStorage.store2(x, y, Y1, Y2);
+                }
+            }
+        }
+        break;
+        case 3: {
+            if (ColorSpace.YCbCr != sourceCS) {
+                throw new CodecException("Unsupported source color space w 3 components: "+sourceCS);
+            }
+            final ComponentOut component1 = this.components[0];
+            final ComponentOut component2 = this.components[1];
+            final ComponentOut component3 = this.components[2];
+            for (int y = 0; y < height; y++) {
+                final int ys = y * scaleY;
+                final byte[] component1Line = component1.getLine((int)(ys * component1.scaleY));
+                final byte[] component2Line = component2.getLine((int)(ys * component2.scaleY));
+                final byte[] component3Line = component3.getLine((int)(ys * component3.scaleY));
+                if( ColorSpace.YCbCr == storageCS ) {
+                    for (int x = 0; x < width; x++) {
+                        final int xs = x * scaleX;
+                        final byte Y  = component1Line[(int)(xs * component1.scaleX)];
+                        final byte Cb = component2Line[(int)(xs * component2.scaleX)];
+                        final byte Cr = component3Line[(int)(xs * component3.scaleX)];
+                        pixelStorage.storeYCbCr(x, y, Y, Cb, Cr);
+                    }
+                } else {
+                    for (int x = 0; x < width; x++) {
+                        final int xs = x * scaleX;
+                        final int Y  = 0x000000FF & component1Line[(int)(xs * component1.scaleX)];
+                        final int Cb = 0x000000FF & component2Line[(int)(xs * component2.scaleX)];
+                        final int Cr = 0x000000FF & component3Line[(int)(xs * component3.scaleX)];
+                        // storeYCbCr2BGR(pixelStorage, x, y, Y, Cb, Cr);
+                        final byte R = clampTo8bit(Y + 1.402f * (Cr - 128f));
+                        final byte G = clampTo8bit(Y - 0.3441363f * (Cb - 128f) - 0.71413636f * (Cr - 128f));
+                        final byte B = clampTo8bit(Y + 1.772f * (Cb - 128f));
+                        pixelStorage.storeRGB(x, y, R, G, B);
+                    }
+                }
+            }
+        }
+        break;
+        case 4: {
+            if (ColorSpace.YCCK != sourceCS && ColorSpace.CMYK != sourceCS) {
+                throw new CodecException("Unsupported source color space w 4 components: "+sourceCS);
+            }
+            final ComponentOut component1 = this.components[0];
+            final ComponentOut component2 = this.components[1];
+            final ComponentOut component3 = this.components[2];
+            final ComponentOut component4 = this.components[3];
+            for (int y = 0; y < height; y++) {
+                final int ys = y * scaleY;
+                final byte[] component1Line = component1.getLine((int)(ys * component1.scaleY));
+                final byte[] component2Line = component2.getLine((int)(ys * component2.scaleY));
+                final byte[] component3Line = component3.getLine((int)(ys * component3.scaleY));
+                final byte[] component4Line = component4.getLine((int)(ys * component4.scaleY));
+                if( ColorSpace.YCbCr == storageCS ) {
+                    if (ColorSpace.YCCK != sourceCS) {
+                        throw new CodecException("Unsupported storage color space "+storageCS+" with source color space "+sourceCS);
+                    }
+                    for (int x = 0; x < width; x++) {
+                        final int xs = x * scaleX;
+                        final byte Y1 = component1Line[(int)(xs * component1.scaleX)];
+                        final byte C1 = component2Line[(int)(xs * component2.scaleX)];
+                        final byte C2 = component3Line[(int)(xs * component3.scaleX)];
+                        // final byte K  = component4Line[(int)(xs * component4.scaleX)];
+                        // FIXME: YCCK is not really YCbCr, since K (black) is missing!
+                        pixelStorage.storeYCbCr(x, y, Y1, C1, C2);
+                    }
+                } else {
+                    if (ColorSpace.CMYK == sourceCS) {
+                        for (int x = 0; x < width; x++) {
+                            final int xs = x * scaleX;
+                            final int cC = 0x000000FF & component1Line[(int)(xs * component1.scaleX)];
+                            final int cM = 0x000000FF & component2Line[(int)(xs * component2.scaleX)];
+                            final int cY = 0x000000FF & component3Line[(int)(xs * component3.scaleX)];
+                            final int cK = 0x000000FF & component4Line[(int)(xs * component4.scaleX)];
+                            // CMYK -> RGB
+                            final byte R = clampTo8bit( ( cC * cK ) / 255f );
+                            final byte G = clampTo8bit( ( cM * cK ) / 255f );
+                            final byte B = clampTo8bit( ( cY * cK ) / 255f );
+                            pixelStorage.storeRGB(x, y, R, G, B);
+                        }
+                    } else { // ColorModel.YCCK == sourceCM
+                        for (int x = 0; x < width; x++) {
+                            final int xs = x * scaleX;
+                            final int Y  = 0x000000FF & component1Line[(int)(xs * component1.scaleX)];
+                            final int Cb = 0x000000FF & component2Line[(int)(xs * component2.scaleX)];
+                            final int Cr = 0x000000FF & component3Line[(int)(xs * component3.scaleX)];
+                            final int cK = 0x000000FF & component4Line[(int)(xs * component4.scaleX)];
+                            // YCCK -> 255f - [ R'G'B' ] -> CMYK
+                            final float cC = 255f - ( Y + 1.402f * (Cr - 128f) );
+                            final float cM = 255f - ( Y - 0.3441363f * (Cb - 128f) - 0.71413636f * (Cr - 128f) );
+                            final float cY = 255f - ( Y + 1.772f * (Cb - 128f) );
+                            // CMYK -> RGB
+                            final byte R = clampTo8bit( ( cC * cK ) / 255f );
+                            final byte G = clampTo8bit( ( cM * cK ) / 255f );
+                            final byte B = clampTo8bit( ( cY * cK ) / 255f );
+                            pixelStorage.storeRGB(x, y, R, G, B);
+                        }
+                    }
+                }
+            }
+        }
+        break;
+        default:
+            throw new CodecException("Unsupported color model: Space "+sourceCS+", components "+componentCount);
+        }
+    }
+
+    private static byte clampTo8bit(float a) {
+        return (byte) ( a < 0f ? 0 : a > 255f ? 255 : a );
+    }
+
+    private static String toHexString(int v) {
+        return "0x"+Integer.toHexString(v);
+    }
+}
\ No newline at end of file
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java b/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java
index a34f73ab2..5e177b8c3 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java
@@ -1,8 +1,10 @@
 package jogamp.opengl.util.pngj;

 

+import java.util.HashMap;

+

 /**

  * Internal PNG predictor filter, or strategy to select it.

- * 

+ *

  */

 public enum FilterType {

 	/**

@@ -26,69 +28,46 @@ public enum FilterType {
 	 */

 	FILTER_PAETH(4),

 	/**

-	 * Default strategy: select one of the above filters depending on global image parameters

+	 * Default strategy: select one of the above filters depending on global

+	 * image parameters

 	 */

 	FILTER_DEFAULT(-1),

 	/**

-	 * Aggresive strategy: select one of the above filters trying each of the filters (this is done every 8 rows)

+	 * Aggressive strategy: select one of the above filters trying each of the

+	 * filters (every 8 rows)

 	 */

 	FILTER_AGGRESSIVE(-2),

 	/**

+	 * Very aggressive strategy: select one of the above filters trying each of

+	 * the filters (for every row!)

+	 */

+	FILTER_VERYAGGRESSIVE(-3),

+	/**

 	 * Uses all fiters, one for lines, cyciclally. Only for tests.

 	 */

-	FILTER_ALTERNATE(-3),

+	FILTER_CYCLIC(-50),

+

 	/**

-	 * Aggresive strategy: select one of the above filters trying each of the filters (this is done for every row!)

+	 * Not specified, placeholder for unknown or NA filters.

 	 */

-	FILTER_VERYAGGRESSIVE(-4), ;

+	FILTER_UNKNOWN(-100), ;

 	public final int val;

 

 	private FilterType(int val) {

 		this.val = val;

 	}

 

-	public static FilterType getByVal(int i) {

+	private static HashMap<Integer, FilterType> byVal;

+

+	static {

+		byVal = new HashMap<Integer, FilterType>();

 		for (FilterType ft : values()) {

-			if (ft.val == i)

-				return ft;

+			byVal.put(ft.val, ft);

 		}

-		return null;

-	}

-

-	public static int unfilterRowNone(int r) {

-		return (int) (r & 0xFF);

 	}

 

-	public static int unfilterRowSub(int r, int left) {

-		return ((int) (r + left) & 0xFF);

-	}

-

-	public static int unfilterRowUp(int r, int up) {

-		return ((int) (r + up) & 0xFF);

-	}

-

-	public static int unfilterRowAverage(int r, int left, int up) {

-		return (r + (left + up) / 2) & 0xFF;

-	}

-

-	public static int unfilterRowPaeth(int r, int a, int b, int c) { // a = left, b = above, c = upper left

-		return (r + filterPaethPredictor(a, b, c)) & 0xFF;

+	public static FilterType getByVal(int i) {

+		return byVal.get(i);

 	}

 

-	public static int filterPaethPredictor(int a, int b, int c) {

-		// from http://www.libpng.org/pub/png/spec/1.2/PNG-Filters.html

-		// a = left, b = above, c = upper left

-		final int p = a + b - c;// ; initial estimate

-		final int pa = p >= a ? p - a : a - p;

-		final int pb = p >= b ? p - b : b - p;

-		final int pc = p >= c ? p - c : c - p;

-		// ; return nearest of a,b,c,

-		// ; breaking ties in order a,b,c.

-		if (pa <= pb && pa <= pc)

-			return a;

-		else if (pb <= pc)

-			return b;

-		else

-			return c;

-	}

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/FilterWriteStrategy.java b/src/jogl/classes/jogamp/opengl/util/pngj/FilterWriteStrategy.java
index 27586b292..79eed8f85 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/FilterWriteStrategy.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/FilterWriteStrategy.java
@@ -1,7 +1,7 @@
 package jogamp.opengl.util.pngj;

 

 /**

- * Manages the writer strategy for selecting the internal png "filter"

+ * Manages the writer strategy for selecting the internal png predictor filter

  */

 class FilterWriteStrategy {

 	private static final int COMPUTE_STATS_EVERY_N_LINES = 8;

@@ -89,7 +89,7 @@ class FilterWriteStrategy {
 				}

 			}

 		}

-		if (configuredType == FilterType.FILTER_ALTERNATE) {

+		if (configuredType == FilterType.FILTER_CYCLIC) {

 			currentType = FilterType.getByVal((currentType.val + 1) % 5);

 		}

 		return currentType;

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageInfo.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageInfo.java
index 2f6b89e9c..ac7b858e1 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ImageInfo.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageInfo.java
@@ -3,7 +3,8 @@ package jogamp.opengl.util.pngj;
 /**

  * Simple immutable wrapper for basic image info.

  * <p>

- * Some parameters are redundant, but the constructor receives an 'orthogonal' subset.

+ * Some parameters are redundant, but the constructor receives an 'orthogonal'

+ * subset.

  * <p>

  * ref: http://www.w3.org/TR/PNG/#11IHDR

  */

@@ -13,24 +14,25 @@ public class ImageInfo {
 	private static final int MAX_COLS_ROWS_VAL = 1000000;

 

 	/**

-	 * Image width, in pixels.

+	 * Cols= Image width, in pixels.

 	 */

 	public final int cols;

 

 	/**

-	 * Image height, in pixels

+	 * Rows= Image height, in pixels

 	 */

 	public final int rows;

 

 	/**

-	 * Bits per sample (per channel) in the buffer (1-2-4-8-16). This is 8-16 for RGB/ARGB images, 1-2-4-8 for

-	 * grayscale. For indexed images, number of bits per palette index (1-2-4-8)

+	 * Bits per sample (per channel) in the buffer (1-2-4-8-16). This is 8-16

+	 * for RGB/ARGB images, 1-2-4-8 for grayscale. For indexed images, number of

+	 * bits per palette index (1-2-4-8)

 	 */

 	public final int bitDepth;

 

 	/**

-	 * Number of channels, as used internally. This is 3 for RGB, 4 for RGBA, 2 for GA (gray with alpha), 1 for

-	 * grayscales or indexed.

+	 * Number of channels, as used internally: 3 for RGB, 4 for RGBA, 2 for GA

+	 * (gray with alpha), 1 for grayscale or indexed.

 	 */

 	public final int channels;

 

@@ -50,7 +52,8 @@ public class ImageInfo {
 	public final boolean indexed;

 

 	/**

-	 * Flag: true if image internally uses less than one byte per sample (bit depth 1-2-4)

+	 * Flag: true if image internally uses less than one byte per sample (bit

+	 * depth 1-2-4)

 	 */

 	public final boolean packed;

 

@@ -75,10 +78,16 @@ public class ImageInfo {
 	public final int samplesPerRow;

 

 	/**

-	 * For internal use only. Samples available for our packed scanline. Equals samplesPerRow if not packed. Elsewhere,

-	 * it's lower

+	 * Amount of "packed samples" : when several samples are stored in a single

+	 * byte (bitdepth 1,2 4) they are counted as one "packed sample". This is

+	 * less that samplesPerRow only when bitdepth is 1-2-4 (flag packed = true)

+	 * <p>

+	 * This equals the number of elements in the scanline array if working with

+	 * packedMode=true

+	 * <p>

+	 * For internal use, client code should rarely access this.

 	 */

-	final int samplesPerRowP;

+	public final int samplesPerRowPacked;

 

 	/**

 	 * Short constructor: assumes truecolor (RGB/RGBA)

@@ -89,13 +98,14 @@ public class ImageInfo {
 

 	/**

 	 * Full constructor

-	 * 

+	 *

 	 * @param cols

 	 *            Width in pixels

 	 * @param rows

 	 *            Height in pixels

 	 * @param bitdepth

-	 *            Bits per sample, in the buffer : 8-16 for RGB true color and greyscale

+	 *            Bits per sample, in the buffer : 8-16 for RGB true color and

+	 *            greyscale

 	 * @param alpha

 	 *            Flag: has an alpha channel (RGBA or GA)

 	 * @param grayscale

@@ -119,7 +129,7 @@ public class ImageInfo {
 		this.bytesPixel = (bitspPixel + 7) / 8;

 		this.bytesPerRow = (bitspPixel * cols + 7) / 8;

 		this.samplesPerRow = channels * this.cols;

-		this.samplesPerRowP = packed ? bytesPerRow : samplesPerRow;

+		this.samplesPerRowPacked = packed ? bytesPerRow : samplesPerRow;

 		// several checks

 		switch (this.bitDepth) {

 		case 1:

@@ -147,7 +157,7 @@ public class ImageInfo {
 	public String toString() {

 		return "ImageInfo [cols=" + cols + ", rows=" + rows + ", bitDepth=" + bitDepth + ", channels=" + channels

 				+ ", bitspPixel=" + bitspPixel + ", bytesPixel=" + bytesPixel + ", bytesPerRow=" + bytesPerRow

-				+ ", samplesPerRow=" + samplesPerRow + ", samplesPerRowP=" + samplesPerRowP + ", alpha=" + alpha

+				+ ", samplesPerRow=" + samplesPerRow + ", samplesPerRowP=" + samplesPerRowPacked + ", alpha=" + alpha

 				+ ", greyscale=" + greyscale + ", indexed=" + indexed + ", packed=" + packed + "]";

 	}

 

@@ -157,16 +167,11 @@ public class ImageInfo {
 		int result = 1;

 		result = prime * result + (alpha ? 1231 : 1237);

 		result = prime * result + bitDepth;

-		result = prime * result + bitspPixel;

-		result = prime * result + bytesPerRow;

-		result = prime * result + bytesPixel;

 		result = prime * result + channels;

 		result = prime * result + cols;

 		result = prime * result + (greyscale ? 1231 : 1237);

 		result = prime * result + (indexed ? 1231 : 1237);

-		result = prime * result + (packed ? 1231 : 1237);

 		result = prime * result + rows;

-		result = prime * result + samplesPerRow;

 		return result;

 	}

 

@@ -183,12 +188,6 @@ public class ImageInfo {
 			return false;

 		if (bitDepth != other.bitDepth)

 			return false;

-		if (bitspPixel != other.bitspPixel)

-			return false;

-		if (bytesPerRow != other.bytesPerRow)

-			return false;

-		if (bytesPixel != other.bytesPixel)

-			return false;

 		if (channels != other.channels)

 			return false;

 		if (cols != other.cols)

@@ -197,12 +196,9 @@ public class ImageInfo {
 			return false;

 		if (indexed != other.indexed)

 			return false;

-		if (packed != other.packed)

-			return false;

 		if (rows != other.rows)

 			return false;

-		if (samplesPerRow != other.samplesPerRow)

-			return false;

 		return true;

 	}

+

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java
index bfbb35b7c..e6afd8694 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java
@@ -1,11 +1,12 @@
 package jogamp.opengl.util.pngj;

 

-import java.util.Arrays;

+import jogamp.opengl.util.pngj.ImageLineHelper.ImageLineStats;

 

 /**

  * Lightweight wrapper for an image scanline, used for read and write.

  * <p>

- * This object can be (usually it is) reused while iterating over the image lines.

+ * This object can be (usually it is) reused while iterating over the image

+ * lines.

  * <p>

  * See <code>scanline</code> field, to understand the format.

  */

@@ -18,28 +19,97 @@ public class ImageLine {
 	private int rown = 0;

 

 	/**

-	 * The 'scanline' is an array of integers, corresponds to an image line (row).

+	 * The 'scanline' is an array of integers, corresponds to an image line

+	 * (row).

 	 * <p>

-	 * Except for 'packed' formats (gray/indexed with 1-2-4 bitdepth) each int is a "sample" (one for channel), (0-255

-	 * or 0-65535) in the respective PNG sequence sequence : (R G B R G B...) or (R G B A R G B A...) or (g g g ...) or

-	 * ( i i i) (palette index)

+	 * Except for 'packed' formats (gray/indexed with 1-2-4 bitdepth) each

+	 * <code>int</code> is a "sample" (one for channel), (0-255 or 0-65535) in

+	 * the corresponding PNG sequence: <code>R G B R G B...</code> or

+	 * <code>R G B A R G B A...</tt>

+	 * or <code>g g g ...</code> or <code>i i i</code> (palette index)

 	 * <p>

-	 * For bitdepth 1/2/4 , each element is a PACKED byte! To get an unpacked copy, see <code>tf_pack()</code> and its

-	 * inverse <code>tf_unpack()</code>

+	 * For bitdepth=1/2/4 , and if samplesUnpacked=false, each value is a PACKED

+	 * byte!

 	 * <p>

-	 * To convert a indexed line to RGB balues, see <code>ImageLineHelper.tf_palIdx2RGB()</code> (can't do the reverse)

+	 * To convert a indexed line to RGB balues, see

+	 * <code>ImageLineHelper.palIdx2RGB()</code> (you can't do the reverse)

 	 */

-	public final int[] scanline; // see explanation above!!

+	public final int[] scanline;

+	/**

+	 * Same as {@link #scanline}, but with one byte per sample. Only one of

+	 * scanline and scanlineb is valid - this depends on {@link #sampleType}

+	 */

+	public final byte[] scanlineb;

 

 	protected FilterType filterUsed; // informational ; only filled by the reader

-	public final int channels; // copied from imgInfo, more handy

-	public final int bitDepth; // copied from imgInfo, more handy

+	final int channels; // copied from imgInfo, more handy

+	final int bitDepth; // copied from imgInfo, more handy

+	final int elementsPerRow; // = imgInfo.samplePerRowPacked, if packed:imgInfo.samplePerRow elswhere

+

+	public enum SampleType {

+		INT, // 4 bytes per sample

+		// SHORT, // 2 bytes per sample

+		BYTE // 1 byte per sample

+	}

 

+	/**

+	 * tells if we are using BYTE or INT to store the samples.

+	 */

+	public final SampleType sampleType;

+

+	/**

+	 * true: each element of the scanline array represents a sample always, even

+	 * for internally packed PNG formats

+	 *

+	 * false: if the original image was of packed type (bit depth less than 8)

+	 * we keep samples packed in a single array element

+	 */

+	public final boolean samplesUnpacked;

+

+	/**

+	 * default mode: INT packed

+	 */

 	public ImageLine(ImageInfo imgInfo) {

+		this(imgInfo, SampleType.INT, false);

+	}

+

+	/**

+	 *

+	 * @param imgInfo

+	 *            Inmutable ImageInfo, basic parameter of the image we are

+	 *            reading or writing

+	 * @param stype

+	 *            INT or BYTE : this determines which scanline is the really

+	 *            used one

+	 * @param unpackedMode

+	 *            If true, we use unpacked format, even for packed original

+	 *            images

+	 *

+	 */

+	public ImageLine(ImageInfo imgInfo, SampleType stype, boolean unpackedMode) {

+		this(imgInfo, stype, unpackedMode, null, null);

+	}

+

+	/**

+	 * If a preallocated array is passed, the copy is shallow

+	 */

+	ImageLine(ImageInfo imgInfo, SampleType stype, boolean unpackedMode, int[] sci, byte[] scb) {

 		this.imgInfo = imgInfo;

 		channels = imgInfo.channels;

-		scanline = new int[imgInfo.samplesPerRowP];

-		this.bitDepth = imgInfo.bitDepth;

+		bitDepth = imgInfo.bitDepth;

+		filterUsed = FilterType.FILTER_UNKNOWN;

+		this.sampleType = stype;

+		this.samplesUnpacked = unpackedMode || !imgInfo.packed;

+		elementsPerRow = this.samplesUnpacked ? imgInfo.samplesPerRow : imgInfo.samplesPerRowPacked;

+		if (stype == SampleType.INT) {

+			scanline = sci != null ? sci : new int[elementsPerRow];

+			scanlineb = null;

+		} else if (stype == SampleType.BYTE) {

+			scanlineb = scb != null ? scb : new byte[elementsPerRow];

+			scanline = null;

+		} else

+			throw new PngjExceptionInternal("bad ImageLine initialization");

+		this.rown = -1;

 	}

 

 	/** This row number inside the image (0 is top) */

@@ -47,129 +117,217 @@ public class ImageLine {
 		return rown;

 	}

 

-	/** Increments row number */

-	public void incRown() {

-		this.rown++;

-	}

-

-	/** Sets row number */

+	/** Sets row number (0 : Rows-1) */

 	public void setRown(int n) {

 		this.rown = n;

 	}

 

-	/** Sets scanline, making copy from passed array */

-	public void setScanLine(int[] b) {

-		System.arraycopy(b, 0, scanline, 0, scanline.length);

+	/*

+	 * Unpacks scanline (for bitdepth 1-2-4)

+	 *

+	 * Arrays must be prealocated. src : samplesPerRowPacked dst : samplesPerRow

+	 *

+	 * This usually works in place (with src==dst and length=samplesPerRow)!

+	 *

+	 * If not, you should only call this only when necesary (bitdepth <8)

+	 *

+	 * If <code>scale==true<code>, it scales the value (just a bit shift) towards 0-255.

+	 */

+	static void unpackInplaceInt(final ImageInfo iminfo, final int[] src, final int[] dst, final boolean scale) {

+		final int bitDepth = iminfo.bitDepth;

+		if (bitDepth >= 8)

+			return; // nothing to do

+		final int mask0 = ImageLineHelper.getMaskForPackedFormatsLs(bitDepth);

+		final int scalefactor = 8 - bitDepth;

+		final int offset0 = 8 * iminfo.samplesPerRowPacked - bitDepth * iminfo.samplesPerRow;

+		int mask, offset, v;

+		if (offset0 != 8) {

+			mask = mask0 << offset0;

+			offset = offset0; // how many bits to shift the mask to the right to recover mask0

+		} else {

+			mask = mask0;

+			offset = 0;

+		}

+		for (int j = iminfo.samplesPerRow - 1, i = iminfo.samplesPerRowPacked - 1; j >= 0; j--) {

+			v = (src[i] & mask) >> offset;

+			if (scale)

+				v <<= scalefactor;

+			dst[j] = v;

+			mask <<= bitDepth;

+			offset += bitDepth;

+			if (offset == 8) {

+				mask = mask0;

+				offset = 0;

+				i--;

+			}

+		}

 	}

 

-	/**

-	 * Returns a copy from scanline, in byte array.

-	 * 

-	 * You can (OPTIONALLY) pass an preallocated array to use.

-	 **/

-	public int[] getScanLineCopy(int[] b) {

-		if (b == null || b.length < scanline.length)

-			b = new int[scanline.length];

-		System.arraycopy(scanline, 0, b, 0, scanline.length);

-		return b;

+	/*

+	 * Unpacks scanline (for bitdepth 1-2-4)

+	 *

+	 * Arrays must be prealocated. src : samplesPerRow dst : samplesPerRowPacked

+	 *

+	 * This usually works in place (with src==dst and length=samplesPerRow)! If not, you should only call this only when

+	 * necesary (bitdepth <8)

+	 *

+	 * The trailing elements are trash

+	 *

+	 *

+	 * If <code>scale==true<code>, it scales the value (just a bit shift) towards 0-255.

+	 */

+	static void packInplaceInt(final ImageInfo iminfo, final int[] src, final int[] dst, final boolean scaled) {

+		final int bitDepth = iminfo.bitDepth;

+		if (bitDepth >= 8)

+			return; // nothing to do

+		final int mask0 = ImageLineHelper.getMaskForPackedFormatsLs(bitDepth);

+		final int scalefactor = 8 - bitDepth;

+		final int offset0 = 8 - bitDepth;

+		int v, v0;

+		int offset = 8 - bitDepth;

+		v0 = src[0]; // first value is special for in place

+		dst[0] = 0;

+		if (scaled)

+			v0 >>= scalefactor;

+		v0 = ((v0 & mask0) << offset);

+		for (int i = 0, j = 0; j < iminfo.samplesPerRow; j++) {

+			v = src[j];

+			if (scaled)

+				v >>= scalefactor;

+			dst[i] |= ((v & mask0) << offset);

+			offset -= bitDepth;

+			if (offset < 0) {

+				offset = offset0;

+				i++;

+				dst[i] = 0;

+			}

+		}

+		dst[0] |= v0;

 	}

 

-	/**

-	 * Unpacks scanline (for bitdepth 1-2-4) into buffer.

-	 * <p>

-	 * You can (OPTIONALLY) pass an preallocated array to use.

-	 * <p>

-	 * If scale==TRUE scales the value (just a bit shift).

-	 */

-	public int[] tf_unpack(int[] buf, boolean scale) {

-		int len = scanline.length;

-		if (bitDepth == 1)

-			len *= 8;

-		else if (bitDepth == 2)

-			len *= 4;

-		else if (bitDepth == 4)

-			len *= 2;

-		if (buf == null)

-			buf = new int[len];

+	static void unpackInplaceByte(final ImageInfo iminfo, final byte[] src, final byte[] dst, final boolean scale) {

+		final int bitDepth = iminfo.bitDepth;

 		if (bitDepth >= 8)

-			System.arraycopy(scanline, 0, buf, 0, scanline.length);

-		else {

-			int mask, offset, v;

-			int mask0 = getMaskForPackedFormats();

-			int offset0 = 8 - bitDepth;

+			return; // nothing to do

+		final int mask0 = ImageLineHelper.getMaskForPackedFormatsLs(bitDepth);

+		final int scalefactor = 8 - bitDepth;

+		final int offset0 = 8 * iminfo.samplesPerRowPacked - bitDepth * iminfo.samplesPerRow;

+		int mask, offset, v;

+		if (offset0 != 8) {

+			mask = mask0 << offset0;

+			offset = offset0; // how many bits to shift the mask to the right to recover mask0

+		} else {

 			mask = mask0;

-			offset = offset0;

-			for (int i = 0, j = 0; i < len; i++) {

-				v = (scanline[j] & mask) >> offset;

-				if (scale)

-					v <<= offset0;

-				buf[i] = v;

-				mask = mask >> bitDepth;

-				offset -= bitDepth;

-				if (mask == 0) { // new byte in source

-					mask = mask0;

-					offset = offset0;

-					j++;

-				}

+			offset = 0;

+		}

+		for (int j = iminfo.samplesPerRow - 1, i = iminfo.samplesPerRowPacked - 1; j >= 0; j--) {

+			v = (src[i] & mask) >> offset;

+			if (scale)

+				v <<= scalefactor;

+			dst[j] = (byte) v;

+			mask <<= bitDepth;

+			offset += bitDepth;

+			if (offset == 8) {

+				mask = mask0;

+				offset = 0;

+				i--;

 			}

 		}

-		return buf;

 	}

 

 	/**

-	 * Packs scanline (for bitdepth 1-2-4) from buffer.

-	 * <p>

-	 * If scale==TRUE scales the value (just a bit shift).

-	 */

-	public void tf_pack(int[] buf, boolean scale) { // writes scanline

-		int len = scanline.length;

-		if (bitDepth == 1)

-			len *= 8;

-		else if (bitDepth == 2)

-			len *= 4;

-		else if (bitDepth == 4)

-			len *= 2;

+	 * size original: samplesPerRow sizeFinal: samplesPerRowPacked (trailing

+	 * elements are trash!)

+	 **/

+	static void packInplaceByte(final ImageInfo iminfo, final byte[] src, final byte[] dst, final boolean scaled) {

+		final int bitDepth = iminfo.bitDepth;

 		if (bitDepth >= 8)

-			System.arraycopy(buf, 0, scanline, 0, scanline.length);

-		else {

-			int offset0 = 8 - bitDepth;

-			int mask0 = getMaskForPackedFormats() >> offset0;

-			int offset, v;

-			offset = offset0;

-			Arrays.fill(scanline, 0);

-			for (int i = 0, j = 0; i < len; i++) {

-				v = buf[i];

-				if (scale)

-					v >>= offset0;

-				v = (v & mask0) << offset;

-				scanline[j] |= v;

-				offset -= bitDepth;

-				if (offset < 0) { // new byte in scanline

-					offset = offset0;

-					j++;

-				}

+			return; // nothing to do

+		final int mask0 = ImageLineHelper.getMaskForPackedFormatsLs(bitDepth);

+		final int scalefactor = 8 - bitDepth;

+		final int offset0 = 8 - bitDepth;

+		int v, v0;

+		int offset = 8 - bitDepth;

+		v0 = src[0]; // first value is special

+		dst[0] = 0;

+		if (scaled)

+			v0 >>= scalefactor;

+		v0 = ((v0 & mask0) << offset);

+		for (int i = 0, j = 0; j < iminfo.samplesPerRow; j++) {

+			v = src[j];

+			if (scaled)

+				v >>= scalefactor;

+			dst[i] |= ((v & mask0) << offset);

+			offset -= bitDepth;

+			if (offset < 0) {

+				offset = offset0;

+				i++;

+				dst[i] = 0;

 			}

 		}

+		dst[0] |= v0;

 	}

 

-	private int getMaskForPackedFormats() { // Utility function for pacj/unpack

-		if (bitDepth == 1)

-			return 0x80;

-		if (bitDepth == 2)

-			return 0xc0;

-		if (bitDepth == 4)

-			return 0xf0;

-		throw new RuntimeException("?");

+	/**

+	 * Creates a new ImageLine similar to this, but unpacked

+	 *

+	 * The caller must be sure that the original was really packed

+	 */

+	public ImageLine unpackToNewImageLine() {

+		ImageLine newline = new ImageLine(imgInfo, sampleType, true);

+		if (sampleType == SampleType.INT)

+			unpackInplaceInt(imgInfo, scanline, newline.scanline, false);

+		else

+			unpackInplaceByte(imgInfo, scanlineb, newline.scanlineb, false);

+		return newline;

+	}

+

+	/**

+	 * Creates a new ImageLine similar to this, but packed

+	 *

+	 * The caller must be sure that the original was really unpacked

+	 */

+	public ImageLine packToNewImageLine() {

+		ImageLine newline = new ImageLine(imgInfo, sampleType, false);

+		if (sampleType == SampleType.INT)

+			packInplaceInt(imgInfo, scanline, newline.scanline, false);

+		else

+			packInplaceByte(imgInfo, scanlineb, newline.scanlineb, false);

+		return newline;

 	}

 

 	public FilterType getFilterUsed() {

 		return filterUsed;

 	}

 

+	public void setFilterUsed(FilterType ft) {

+		filterUsed = ft;

+	}

+

+	public int[] getScanlineInt() {

+		return scanline;

+	}

+

+	public byte[] getScanlineByte() {

+		return scanlineb;

+	}

+

 	/**

 	 * Basic info

 	 */

+	@Override

 	public String toString() {

 		return "row=" + rown + " cols=" + imgInfo.cols + " bpc=" + imgInfo.bitDepth + " size=" + scanline.length;

 	}

+

+	/**

+	 * Prints some statistics - just for debugging

+	 */

+	public static void showLineInfo(ImageLine line) {

+		System.out.println(line);

+		ImageLineStats stats = new ImageLineHelper.ImageLineStats(line);

+		System.out.println(stats);

+		System.out.println(ImageLineHelper.infoFirstLastPixels(line));

+	}

+

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java
new file mode 100644
index 000000000..4636c3955
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java
@@ -0,0 +1,329 @@
+package jogamp.opengl.util.pngj;

+

+import jogamp.opengl.util.pngj.ImageLine.SampleType;

+import jogamp.opengl.util.pngj.chunks.PngChunkPLTE;

+import jogamp.opengl.util.pngj.chunks.PngChunkTRNS;

+

+/**

+ * Bunch of utility static methods to process/analyze an image line at the pixel

+ * level.

+ * <p>

+ * Not essential at all, some methods are probably to be removed if future

+ * releases.

+ * <p>

+ * WARNING: most methods for getting/setting values work currently only for

+ * integer base imageLines

+ */

+public class ImageLineHelper {

+

+	private final static double BIG_VALUE = Double.MAX_VALUE * 0.5;

+

+	private final static double BIG_VALUE_NEG = Double.MAX_VALUE * (-0.5);

+

+	/**

+	 * Given an indexed line with a palette, unpacks as a RGB array, or RGBA if

+	 * a non nul PngChunkTRNS chunk is passed

+	 *

+	 * @param line

+	 *            ImageLine as returned from PngReader

+	 * @param pal

+	 *            Palette chunk

+	 * @param buf

+	 *            Preallocated array, optional

+	 * @return R G B (A), one sample 0-255 per array element. Ready for

+	 *         pngw.writeRowInt()

+	 */

+	public static int[] palette2rgb(ImageLine line, PngChunkPLTE pal, PngChunkTRNS trns, int[] buf) {

+		boolean isalpha = trns != null;

+		int channels = isalpha ? 4 : 3;

+		int nsamples = line.imgInfo.cols * channels;

+		if (buf == null || buf.length < nsamples)

+			buf = new int[nsamples];

+		if (!line.samplesUnpacked)

+			line = line.unpackToNewImageLine();

+		boolean isbyte = line.sampleType == SampleType.BYTE;

+		int nindexesWithAlpha = trns != null ? trns.getPalletteAlpha().length : 0;

+		for (int c = 0; c < line.imgInfo.cols; c++) {

+			int index = isbyte ? (line.scanlineb[c] & 0xFF) : line.scanline[c];

+			pal.getEntryRgb(index, buf, c * channels);

+			if (isalpha) {

+				int alpha = index < nindexesWithAlpha ? trns.getPalletteAlpha()[index] : 255;

+				buf[c * channels + 3] = alpha;

+			}

+		}

+		return buf;

+	}

+

+	public static int[] palette2rgb(ImageLine line, PngChunkPLTE pal, int[] buf) {

+		return palette2rgb(line, pal, null, buf);

+	}

+

+	/**

+	 * what follows is pretty uninteresting/untested/obsolete, subject to change

+	 */

+	/**

+	 * Just for basic info or debugging. Shows values for first and last pixel.

+	 * Does not include alpha

+	 */

+	public static String infoFirstLastPixels(ImageLine line) {

+		return line.imgInfo.channels == 1 ? String.format("first=(%d) last=(%d)", line.scanline[0],

+				line.scanline[line.scanline.length - 1]) : String.format("first=(%d %d %d) last=(%d %d %d)",

+				line.scanline[0], line.scanline[1], line.scanline[2], line.scanline[line.scanline.length

+						- line.imgInfo.channels], line.scanline[line.scanline.length - line.imgInfo.channels + 1],

+				line.scanline[line.scanline.length - line.imgInfo.channels + 2]);

+	}

+

+	public static String infoFull(ImageLine line) {

+		ImageLineStats stats = new ImageLineStats(line);

+		return "row=" + line.getRown() + " " + stats.toString() + "\n  " + infoFirstLastPixels(line);

+	}

+

+	/**

+	 * Computes some statistics for the line. Not very efficient or elegant,

+	 * mainly for tests. Only for RGB/RGBA Outputs values as doubles (0.0 - 1.0)

+	 */

+	static class ImageLineStats {

+		public double[] prom = { 0.0, 0.0, 0.0, 0.0 }; // channel averages

+		public double[] maxv = { BIG_VALUE_NEG, BIG_VALUE_NEG, BIG_VALUE_NEG, BIG_VALUE_NEG }; // maximo

+		public double[] minv = { BIG_VALUE, BIG_VALUE, BIG_VALUE, BIG_VALUE };

+		public double promlum = 0.0; // maximum global (luminance)

+		public double maxlum = BIG_VALUE_NEG; // max luminance

+		public double minlum = BIG_VALUE;

+		public double[] maxdif = { BIG_VALUE_NEG, BIG_VALUE_NEG, BIG_VALUE_NEG, BIG_VALUE }; // maxima

+		public final int channels; // diferencia

+

+		@Override

+		public String toString() {

+			return channels == 3 ? String.format(

+					"prom=%.1f (%.1f %.1f %.1f) max=%.1f (%.1f %.1f %.1f) min=%.1f (%.1f %.1f %.1f)", promlum, prom[0],

+					prom[1], prom[2], maxlum, maxv[0], maxv[1], maxv[2], minlum, minv[0], minv[1], minv[2])

+					+ String.format(" maxdif=(%.1f %.1f %.1f)", maxdif[0], maxdif[1], maxdif[2]) : String.format(

+					"prom=%.1f (%.1f %.1f %.1f %.1f) max=%.1f (%.1f %.1f %.1f %.1f) min=%.1f (%.1f %.1f %.1f %.1f)",

+					promlum, prom[0], prom[1], prom[2], prom[3], maxlum, maxv[0], maxv[1], maxv[2], maxv[3], minlum,

+					minv[0], minv[1], minv[2], minv[3])

+					+ String.format(" maxdif=(%.1f %.1f %.1f %.1f)", maxdif[0], maxdif[1], maxdif[2], maxdif[3]);

+		}

+

+		public ImageLineStats(ImageLine line) {

+			this.channels = line.channels;

+			if (line.channels < 3)

+				throw new PngjException("ImageLineStats only works for RGB - RGBA");

+			int ch = 0;

+			double lum, x, d;

+			for (int i = 0; i < line.imgInfo.cols; i++) {

+				lum = 0;

+				for (ch = channels - 1; ch >= 0; ch--) {

+					x = int2double(line, line.scanline[i * channels]);

+					if (ch < 3)

+						lum += x;

+					prom[ch] += x;

+					if (x > maxv[ch])

+						maxv[ch] = x;

+					if (x < minv[ch])

+						minv[ch] = x;

+					if (i >= channels) {

+						d = Math.abs(x - int2double(line, line.scanline[i - channels]));

+						if (d > maxdif[ch])

+							maxdif[ch] = d;

+					}

+				}

+				promlum += lum;

+				if (lum > maxlum)

+					maxlum = lum;

+				if (lum < minlum)

+					minlum = lum;

+			}

+			for (ch = 0; ch < channels; ch++) {

+				prom[ch] /= line.imgInfo.cols;

+			}

+			promlum /= (line.imgInfo.cols * 3.0);

+			maxlum /= 3.0;

+			minlum /= 3.0;

+		}

+	}

+

+	/**

+	 * integer packed R G B only for bitdepth=8! (does not check!)

+	 *

+	 **/

+	public static int getPixelRGB8(ImageLine line, int column) {

+		int offset = column * line.channels;

+		return (line.scanline[offset] << 16) + (line.scanline[offset + 1] << 8) + (line.scanline[offset + 2]);

+	}

+

+	public static int getPixelARGB8(ImageLine line, int column) {

+		int offset = column * line.channels;

+		return (line.scanline[offset + 3] << 24) + (line.scanline[offset] << 16) + (line.scanline[offset + 1] << 8)

+				+ (line.scanline[offset + 2]);

+	}

+

+	public static void setPixelsRGB8(ImageLine line, int[] rgb) {

+		for (int i = 0, j = 0; i < line.imgInfo.cols; i++) {

+			line.scanline[j++] = ((rgb[i] >> 16) & 0xFF);

+			line.scanline[j++] = ((rgb[i] >> 8) & 0xFF);

+			line.scanline[j++] = ((rgb[i] & 0xFF));

+		}

+	}

+

+	public static void setPixelRGB8(ImageLine line, int col, int r, int g, int b) {

+		col *= line.channels;

+		line.scanline[col++] = r;

+		line.scanline[col++] = g;

+		line.scanline[col] = b;

+	}

+

+	public static void setPixelRGB8(ImageLine line, int col, int rgb) {

+		setPixelRGB8(line, col, (rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF);

+	}

+

+	public static void setPixelsRGBA8(ImageLine line, int[] rgb) {

+		for (int i = 0, j = 0; i < line.imgInfo.cols; i++) {

+			line.scanline[j++] = ((rgb[i] >> 16) & 0xFF);

+			line.scanline[j++] = ((rgb[i] >> 8) & 0xFF);

+			line.scanline[j++] = ((rgb[i] & 0xFF));

+			line.scanline[j++] = ((rgb[i] >> 24) & 0xFF);

+		}

+	}

+

+	public static void setPixelRGBA8(ImageLine line, int col, int r, int g, int b, int a) {

+		col *= line.channels;

+		line.scanline[col++] = r;

+		line.scanline[col++] = g;

+		line.scanline[col++] = b;

+		line.scanline[col] = a;

+	}

+

+	public static void setPixelRGBA8(ImageLine line, int col, int rgb) {

+		setPixelRGBA8(line, col, (rgb >> 16) & 0xFF, (rgb >> 8) & 0xFF, rgb & 0xFF, (rgb >> 24) & 0xFF);

+	}

+

+	public static void setValD(ImageLine line, int i, double d) {

+		line.scanline[i] = double2int(line, d);

+	}

+

+	public static int interpol(int a, int b, int c, int d, double dx, double dy) {

+		// a b -> x (0-1)

+		// c d

+		//

+		double e = a * (1.0 - dx) + b * dx;

+		double f = c * (1.0 - dx) + d * dx;

+		return (int) (e * (1 - dy) + f * dy + 0.5);

+	}

+

+	public static double int2double(ImageLine line, int p) {

+		return line.bitDepth == 16 ? p / 65535.0 : p / 255.0;

+		// TODO: replace my multiplication? check for other bitdepths

+	}

+

+	public static double int2doubleClamped(ImageLine line, int p) {

+		// TODO: replace my multiplication?

+		double d = line.bitDepth == 16 ? p / 65535.0 : p / 255.0;

+		return d <= 0.0 ? 0 : (d >= 1.0 ? 1.0 : d);

+	}

+

+	public static int double2int(ImageLine line, double d) {

+		d = d <= 0.0 ? 0 : (d >= 1.0 ? 1.0 : d);

+		return line.bitDepth == 16 ? (int) (d * 65535.0 + 0.5) : (int) (d * 255.0 + 0.5); //

+	}

+

+	public static int double2intClamped(ImageLine line, double d) {

+		d = d <= 0.0 ? 0 : (d >= 1.0 ? 1.0 : d);

+		return line.bitDepth == 16 ? (int) (d * 65535.0 + 0.5) : (int) (d * 255.0 + 0.5); //

+	}

+

+	public static int clampTo_0_255(int i) {

+		return i > 255 ? 255 : (i < 0 ? 0 : i);

+	}

+

+	public static int clampTo_0_65535(int i) {

+		return i > 65535 ? 65535 : (i < 0 ? 0 : i);

+	}

+

+	public static int clampTo_128_127(int x) {

+		return x > 127 ? 127 : (x < -128 ? -128 : x);

+	}

+

+	/**

+	 * Unpacks scanline (for bitdepth 1-2-4) into a array <code>int[]</code>

+	 * <p>

+	 * You can (OPTIONALLY) pass an preallocated array, that will be filled and

+	 * returned. If null, it will be allocated

+	 * <p>

+	 * If

+	 * <code>scale==true<code>, it scales the value (just a bit shift) towards 0-255.

+	 * <p>

+	 * You probably should use {@link ImageLine#unpackToNewImageLine()}

+	 *

+	 */

+	public static int[] unpack(ImageInfo imgInfo, int[] src, int[] dst, boolean scale) {

+		int len1 = imgInfo.samplesPerRow;

+		int len0 = imgInfo.samplesPerRowPacked;

+		if (dst == null || dst.length < len1)

+			dst = new int[len1];

+		if (imgInfo.packed)

+			ImageLine.unpackInplaceInt(imgInfo, src, dst, scale);

+		else

+			System.arraycopy(src, 0, dst, 0, len0);

+		return dst;

+	}

+

+	public static byte[] unpack(ImageInfo imgInfo, byte[] src, byte[] dst, boolean scale) {

+		int len1 = imgInfo.samplesPerRow;

+		int len0 = imgInfo.samplesPerRowPacked;

+		if (dst == null || dst.length < len1)

+			dst = new byte[len1];

+		if (imgInfo.packed)

+			ImageLine.unpackInplaceByte(imgInfo, src, dst, scale);

+		else

+			System.arraycopy(src, 0, dst, 0, len0);

+		return dst;

+	}

+

+	/**

+	 * Packs scanline (for bitdepth 1-2-4) from array into the scanline

+	 * <p>

+	 * If <code>scale==true<code>, it scales the value (just a bit shift).

+	 *

+	 * You probably should use {@link ImageLine#packToNewImageLine()}

+	 */

+	public static int[] pack(ImageInfo imgInfo, int[] src, int[] dst, boolean scale) {

+		int len0 = imgInfo.samplesPerRowPacked;

+		if (dst == null || dst.length < len0)

+			dst = new int[len0];

+		if (imgInfo.packed)

+			ImageLine.packInplaceInt(imgInfo, src, dst, scale);

+		else

+			System.arraycopy(src, 0, dst, 0, len0);

+		return dst;

+	}

+

+	public static byte[] pack(ImageInfo imgInfo, byte[] src, byte[] dst, boolean scale) {

+		int len0 = imgInfo.samplesPerRowPacked;

+		if (dst == null || dst.length < len0)

+			dst = new byte[len0];

+		if (imgInfo.packed)

+			ImageLine.packInplaceByte(imgInfo, src, dst, scale);

+		else

+			System.arraycopy(src, 0, dst, 0, len0);

+		return dst;

+	}

+

+	static int getMaskForPackedFormats(int bitDepth) { // Utility function for pack/unpack

+		if (bitDepth == 4)

+			return 0xf0;

+		else if (bitDepth == 2)

+			return 0xc0;

+		else

+			return 0x80; // bitDepth == 1

+	}

+

+	static int getMaskForPackedFormatsLs(int bitDepth) { // Utility function for pack/unpack

+		if (bitDepth == 4)

+			return 0x0f;

+		else if (bitDepth == 2)

+			return 0x03;

+		else

+			return 0x01; // bitDepth == 1

+	}

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java
new file mode 100644
index 000000000..fb2cf5910
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java
@@ -0,0 +1,107 @@
+package jogamp.opengl.util.pngj;
+
+import jogamp.opengl.util.pngj.ImageLine.SampleType;
+
+/**
+ * Wraps in a matrix a set of image rows, not necessarily contiguous - but
+ * equispaced.
+ *
+ * The fields mirrors those of {@link ImageLine}, and you can access each row as
+ * a ImageLine backed by the matrix row, see
+ * {@link #getImageLineAtMatrixRow(int)}
+ */
+public class ImageLines {
+
+	public final ImageInfo imgInfo;
+	public final int channels;
+	public final int bitDepth;
+	public final SampleType sampleType;
+	public final boolean samplesUnpacked;
+	public final int elementsPerRow;
+	public final int rowOffset;
+	public final int nRows;
+	public final int rowStep;
+	public final int[][] scanlines;
+	public final byte[][] scanlinesb;
+
+	/**
+	 * Allocates a matrix to store {@code nRows} image rows. See
+	 * {@link ImageLine} and {@link PngReader#readRowsInt()}
+	 * {@link PngReader#readRowsByte()}
+	 *
+	 * @param imgInfo
+	 * @param stype
+	 * @param unpackedMode
+	 * @param rowOffset
+	 * @param nRows
+	 * @param rowStep
+	 */
+	public ImageLines(ImageInfo imgInfo, SampleType stype, boolean unpackedMode, int rowOffset, int nRows, int rowStep) {
+		this.imgInfo = imgInfo;
+		channels = imgInfo.channels;
+		bitDepth = imgInfo.bitDepth;
+		this.sampleType = stype;
+		this.samplesUnpacked = unpackedMode || !imgInfo.packed;
+		elementsPerRow = unpackedMode ? imgInfo.samplesPerRow : imgInfo.samplesPerRowPacked;
+		this.rowOffset = rowOffset;
+		this.nRows = nRows;
+		this.rowStep = rowStep;
+		if (stype == SampleType.INT) {
+			scanlines = new int[nRows][elementsPerRow];
+			scanlinesb = null;
+		} else if (stype == SampleType.BYTE) {
+			scanlinesb = new byte[nRows][elementsPerRow];
+			scanlines = null;
+		} else
+			throw new PngjExceptionInternal("bad ImageLine initialization");
+	}
+
+	/**
+	 * Warning: this always returns a valid matrix row (clamping on 0 : nrows-1,
+	 * and rounding down) Eg: rowOffset=4,rowStep=2 imageRowToMatrixRow(17)
+	 * returns 6 , imageRowToMatrixRow(1) returns 0
+	 */
+	public int imageRowToMatrixRow(int imrow) {
+		int r = (imrow - rowOffset) / rowStep;
+		return r < 0 ? 0 : (r < nRows ? r : nRows - 1);
+	}
+
+	/**
+	 * Same as imageRowToMatrixRow, but returns negative if invalid
+	 */
+	public int imageRowToMatrixRowStrict(int imrow) {
+		imrow -= rowOffset;
+		int mrow = imrow >= 0 && imrow % rowStep == 0 ? imrow / rowStep : -1;
+		return mrow < nRows ? mrow : -1;
+	}
+
+	/**
+	 * Converts from matrix row number (0 : nRows-1) to image row number
+	 *
+	 * @param mrow
+	 *            Matrix row number
+	 * @return Image row number. Invalid only if mrow is invalid
+	 */
+	public int matrixRowToImageRow(int mrow) {
+		return mrow * rowStep + rowOffset;
+	}
+
+	/**
+	 * Returns a ImageLine is backed by the matrix, no allocation done
+	 *
+	 * @param mrow
+	 *            Matrix row, from 0 to nRows This is not necessarily the image
+	 *            row, see {@link #imageRowToMatrixRow(int)} and
+	 *            {@link #matrixRowToImageRow(int)}
+	 * @return A new ImageLine, backed by the matrix, with the correct ('real')
+	 *         rownumber
+	 */
+	public ImageLine getImageLineAtMatrixRow(int mrow) {
+		if (mrow < 0 || mrow > nRows)
+			throw new PngjException("Bad row " + mrow + ". Should be positive and less than " + nRows);
+		ImageLine imline = sampleType == SampleType.INT ? new ImageLine(imgInfo, sampleType, samplesUnpacked,
+				scanlines[mrow], null) : new ImageLine(imgInfo, sampleType, samplesUnpacked, null, scanlinesb[mrow]);
+		imline.setRown(matrixRowToImageRow(mrow));
+		return imline;
+	}
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngDeinterlacer.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngDeinterlacer.java
new file mode 100644
index 000000000..e099c4f6a
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngDeinterlacer.java
@@ -0,0 +1,277 @@
+package jogamp.opengl.util.pngj;
+
+import java.util.Random;
+
+// you really dont' want to peek inside this
+class PngDeinterlacer {
+	private final ImageInfo imi;
+	private int pass; // 1-7
+	private int rows, cols, dY, dX, oY, oX, oXsamples, dXsamples; // at current pass
+	// current row in the virtual subsampled image; this incrementes from 0 to cols/dy 7 times
+	private int currRowSubimg = -1;
+	// in the real image, this will cycle from 0 to im.rows in different steps, 7 times
+	private int currRowReal = -1;
+
+	private final int packedValsPerPixel;
+	private final int packedMask;
+	private final int packedShift;
+
+	private int[][] imageInt; // FULL image -only used for PngWriter as temporary storage
+	private short[][] imageShort;
+	private byte[][] imageByte;
+
+	PngDeinterlacer(ImageInfo iminfo) {
+		this.imi = iminfo;
+		pass = 0;
+		if (imi.packed) {
+			packedValsPerPixel = 8 / imi.bitDepth;
+			packedShift = imi.bitDepth;
+			if (imi.bitDepth == 1)
+				packedMask = 0x80;
+			else if (imi.bitDepth == 2)
+				packedMask = 0xc0;
+			else
+				packedMask = 0xf0;
+		} else {
+			packedMask = packedShift = packedValsPerPixel = 1;// dont care
+		}
+		setPass(1);
+		setRow(0);
+	}
+
+	/** this refers to the row currRowSubimg */
+	void setRow(int n) {
+		currRowSubimg = n;
+		currRowReal = n * dY + oY;
+		if (currRowReal < 0 || currRowReal >= imi.rows)
+			throw new PngjExceptionInternal("bad row - this should not happen");
+	}
+
+	void setPass(int p) {
+		if (this.pass == p)
+			return;
+		pass = p;
+		switch (pass) {
+		case 1:
+			dY = dX = 8;
+			oX = oY = 0;
+			break;
+		case 2:
+			dY = dX = 8;
+			oX = 4;
+			oY = 0;
+			break;
+		case 3:
+			dX = 4;
+			dY = 8;
+			oX = 0;
+			oY = 4;
+			break;
+		case 4:
+			dX = dY = 4;
+			oX = 2;
+			oY = 0;
+			break;
+		case 5:
+			dX = 2;
+			dY = 4;
+			oX = 0;
+			oY = 2;
+			break;
+		case 6:
+			dX = dY = 2;
+			oX = 1;
+			oY = 0;
+			break;
+		case 7:
+			dX = 1;
+			dY = 2;
+			oX = 0;
+			oY = 1;
+			break;
+		default:
+			throw new PngjExceptionInternal("bad interlace pass" + pass);
+		}
+		rows = (imi.rows - oY) / dY + 1;
+		if ((rows - 1) * dY + oY >= imi.rows)
+			rows--; // can be 0
+		cols = (imi.cols - oX) / dX + 1;
+		if ((cols - 1) * dX + oX >= imi.cols)
+			cols--; // can be 0
+		if (cols == 0)
+			rows = 0; // really...
+		dXsamples = dX * imi.channels;
+		oXsamples = oX * imi.channels;
+	}
+
+	// notice that this is a "partial" deinterlace, it will be called several times for the same row!
+	void deinterlaceInt(int[] src, int[] dst, boolean readInPackedFormat) {
+		if (!(imi.packed && readInPackedFormat))
+			for (int i = 0, j = oXsamples; i < cols * imi.channels; i += imi.channels, j += dXsamples)
+				for (int k = 0; k < imi.channels; k++)
+					dst[j + k] = src[i + k];
+		else
+			deinterlaceIntPacked(src, dst);
+	}
+
+	// interlaced+packed = monster; this is very clumsy!
+	private void deinterlaceIntPacked(int[] src, int[] dst) {
+		int spos, smod, smask; // source byte position, bits to shift to left (01,2,3,4
+		int tpos, tmod, p, d;
+		spos = 0;
+		smask = packedMask;
+		smod = -1;
+		// can this really work?
+		for (int i = 0, j = oX; i < cols; i++, j += dX) {
+			spos = i / packedValsPerPixel;
+			smod += 1;
+			if (smod >= packedValsPerPixel)
+				smod = 0;
+			smask >>= packedShift; // the source mask cycles
+			if (smod == 0)
+				smask = packedMask;
+			tpos = j / packedValsPerPixel;
+			tmod = j % packedValsPerPixel;
+			p = src[spos] & smask;
+			d = tmod - smod;
+			if (d > 0)
+				p >>= (d * packedShift);
+			else if (d < 0)
+				p <<= ((-d) * packedShift);
+			dst[tpos] |= p;
+		}
+	}
+
+	// yes, duplication of code is evil, normally
+	void deinterlaceByte(byte[] src, byte[] dst, boolean readInPackedFormat) {
+		if (!(imi.packed && readInPackedFormat))
+			for (int i = 0, j = oXsamples; i < cols * imi.channels; i += imi.channels, j += dXsamples)
+				for (int k = 0; k < imi.channels; k++)
+					dst[j + k] = src[i + k];
+		else
+			deinterlacePackedByte(src, dst);
+	}
+
+	private void deinterlacePackedByte(byte[] src, byte[] dst) {
+		int spos, smod, smask; // source byte position, bits to shift to left (01,2,3,4
+		int tpos, tmod, p, d;
+		// what the heck are you reading here? I told you would not enjoy this. Try Dostoyevsky or Simone Weil instead
+		spos = 0;
+		smask = packedMask;
+		smod = -1;
+		// Arrays.fill(dst, 0);
+		for (int i = 0, j = oX; i < cols; i++, j += dX) {
+			spos = i / packedValsPerPixel;
+			smod += 1;
+			if (smod >= packedValsPerPixel)
+				smod = 0;
+			smask >>= packedShift; // the source mask cycles
+			if (smod == 0)
+				smask = packedMask;
+			tpos = j / packedValsPerPixel;
+			tmod = j % packedValsPerPixel;
+			p = src[spos] & smask;
+			d = tmod - smod;
+			if (d > 0)
+				p >>= (d * packedShift);
+			else if (d < 0)
+				p <<= ((-d) * packedShift);
+			dst[tpos] |= p;
+		}
+	}
+
+	/**
+	 * Is current row the last row for the lass pass??
+	 */
+	boolean isAtLastRow() {
+		return pass == 7 && currRowSubimg == rows - 1;
+	}
+
+	/**
+	 * current row number inside the "sub image"
+	 */
+	int getCurrRowSubimg() {
+		return currRowSubimg;
+	}
+
+	/**
+	 * current row number inside the "real image"
+	 */
+	int getCurrRowReal() {
+		return currRowReal;
+	}
+
+	/**
+	 * current pass number (1-7)
+	 */
+	int getPass() {
+		return pass;
+	}
+
+	/**
+	 * How many rows has the current pass?
+	 **/
+	int getRows() {
+		return rows;
+	}
+
+	/**
+	 * How many columns (pixels) are there in the current row
+	 */
+	int getCols() {
+		return cols;
+	}
+
+	public int getPixelsToRead() {
+		return getCols();
+	}
+
+	int[][] getImageInt() {
+		return imageInt;
+	}
+
+	void setImageInt(int[][] imageInt) {
+		this.imageInt = imageInt;
+	}
+
+	short[][] getImageShort() {
+		return imageShort;
+	}
+
+	void setImageShort(short[][] imageShort) {
+		this.imageShort = imageShort;
+	}
+
+	byte[][] getImageByte() {
+		return imageByte;
+	}
+
+	void setImageByte(byte[][] imageByte) {
+		this.imageByte = imageByte;
+	}
+
+	static void test() {
+		Random rand = new Random();
+		PngDeinterlacer ih = new PngDeinterlacer(new ImageInfo(rand.nextInt(35) + 1, rand.nextInt(52) + 1, 8, true));
+		int np = ih.imi.cols * ih.imi.rows;
+		System.out.println(ih.imi);
+		for (int p = 1; p <= 7; p++) {
+			ih.setPass(p);
+			for (int row = 0; row < ih.getRows(); row++) {
+				ih.setRow(row);
+				int b = ih.getCols();
+				np -= b;
+				System.out.printf("Read %d pixels. Pass:%d Realline:%d cols=%d dX=%d oX=%d last:%b\n", b, ih.pass,
+						ih.currRowReal, ih.cols, ih.dX, ih.oX, ih.isAtLastRow());
+
+			}
+		}
+		if (np != 0)
+			throw new PngjExceptionInternal("wtf??" + ih.imi);
+	}
+
+	public static void main(String[] args) {
+		test();
+	}
+
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngHelper.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngHelperInternal.java
index 1016b1b64..9e64c3eb1 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngHelper.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngHelperInternal.java
@@ -4,37 +4,52 @@ import java.io.IOException;
 import java.io.InputStream;

 import java.io.OutputStream;

 import java.nio.charset.Charset;

-import java.util.HashSet;

-import java.util.Set;

 import java.util.zip.CRC32;

 

 /**

- * Some utility static methods.

+ * Some utility static methods for internal use.

  * <p>

- * See also <code>FileHelper</code> (if not sandboxed).

+ * Client code should not normally use this class

  * <p>

- * Client code should rarely need these methods.

  */

-public class PngHelper {

+public class PngHelperInternal {

 	/**

 	 * Default charset, used internally by PNG for several things

 	 */

 	public static Charset charsetLatin1 = Charset.forName("ISO-8859-1");

-	public static Charset charsetUTF8 = Charset.forName("UTF-8"); // only for some chunks

+	/**

+	 * UTF-8 is only used for some chunks

+	 */

+	public static Charset charsetUTF8 = Charset.forName("UTF-8");

 

 	static boolean DEBUG = false;

 

+	/**

+	 * PNG magic bytes

+	 */

+	public static byte[] getPngIdSignature() {

+		return new byte[] { -119, 80, 78, 71, 13, 10, 26, 10 };

+	}

+

+	public static int doubleToInt100000(double d) {

+		return (int) (d * 100000.0 + 0.5);

+	}

+

+	public static double intToDouble100000(int i) {

+		return i / 100000.0;

+	}

+

 	public static int readByte(InputStream is) {

 		try {

 			return is.read();

 		} catch (IOException e) {

-			throw new PngjOutputException(e);

+			throw new PngjInputException("error reading byte", e);

 		}

 	}

 

 	/**

 	 * -1 if eof

-	 * 

+	 *

 	 * PNG uses "network byte order"

 	 */

 	public static int readInt2(InputStream is) {

@@ -111,7 +126,7 @@ public class PngHelper {
 	}

 

 	/**

-	 * guaranteed to read exactly len bytes. throws error if it cant

+	 * guaranteed to read exactly len bytes. throws error if it can't

 	 */

 	public static void readBytes(InputStream is, byte[] b, int offset, int len) {

 		if (len == 0)

@@ -121,7 +136,7 @@ public class PngHelper {
 			while (read < len) {

 				int n = is.read(b, offset + read, len - read);

 				if (n < 1)

-					throw new RuntimeException("error reading bytes, " + n + " !=" + len);

+					throw new PngjInputException("error reading bytes, " + n + " !=" + len);

 				read += n;

 			}

 		} catch (IOException e) {

@@ -129,6 +144,26 @@ public class PngHelper {
 		}

 	}

 

+	public static void skipBytes(InputStream is, long len) {

+		try {

+			while (len > 0) {

+				long n1 = is.skip(len);

+				if (n1 > 0) {

+					len -= n1;

+				} else if (n1 == 0) { // should we retry? lets read one byte

+					if (is.read() == -1) // EOF

+						break;

+					else

+						len--;

+				} else

+					// negative? this should never happen but...

+					throw new IOException("skip() returned a negative value ???");

+			}

+		} catch (IOException e) {

+			throw new PngjInputException(e);

+		}

+	}

+

 	public static void writeBytes(OutputStream os, byte[] b) {

 		try {

 			os.write(b);

@@ -150,26 +185,8 @@ public class PngHelper {
 			System.out.println(msg);

 	}

 

-	public static Set<String> asSet(String... values) {

-		return new HashSet<String>(java.util.Arrays.asList(values));

-	}

-

-	public static Set<String> unionSets(Set<String> set1, Set<String> set2) {

-		Set<String> s = new HashSet<String>();

-		s.addAll(set1);

-		s.addAll(set2);

-		return s;

-	}

-

-	public static Set<String> unionSets(Set<String> set1, Set<String> set2, Set<String> set3) {

-		Set<String> s = new HashSet<String>();

-		s.addAll(set1);

-		s.addAll(set2);

-		s.addAll(set3);

-		return s;

-	}

-

 	private static final ThreadLocal<CRC32> crcProvider = new ThreadLocal<CRC32>() {

+		@Override

 		protected CRC32 initialValue() {

 			return new CRC32();

 		}

@@ -180,34 +197,74 @@ public class PngHelper {
 		return crcProvider.get();

 	}

 

-	static final byte[] pngIdBytes = { -119, 80, 78, 71, 13, 10, 26, 10 }; // png magic

+	// / filters

+	public static int filterRowNone(int r) {

+		return (int) (r & 0xFF);

+	}

 

-	public static double resMetersToDpi(long res) {

-		return (double) res * 0.0254;

+	public static int filterRowSub(int r, int left) {

+		return ((int) (r - left) & 0xFF);

 	}

 

-	public static long resDpiToMeters(double dpi) {

-		return (long) (dpi / 0.0254 + 0.5);

+	public static int filterRowUp(int r, int up) {

+		return ((int) (r - up) & 0xFF);

 	}

 

-	public static int doubleToInt100000(double d) {

-		return (int) (d * 100000.0 + 0.5);

+	public static int filterRowAverage(int r, int left, int up) {

+		return (r - (left + up) / 2) & 0xFF;

 	}

 

-	public static double intToDouble100000(int i) {

-		return i / 100000.0;

+	public static int filterRowPaeth(int r, int left, int up, int upleft) { // a = left, b = above, c = upper left

+		return (r - filterPaethPredictor(left, up, upleft)) & 0xFF;

 	}

 

-	public static int clampTo_0_255(int i) {

-		return i > 255 ? 255 : (i < 0 ? 0 : i);

+	public static int unfilterRowNone(int r) {

+		return (int) (r & 0xFF);

 	}

 

-	public static int clampTo_0_65535(int i) {

-		return i > 65535 ? 65535 : (i < 0 ? 0 : i);

+	public static int unfilterRowSub(int r, int left) {

+		return ((int) (r + left) & 0xFF);

+	}

+

+	public static int unfilterRowUp(int r, int up) {

+		return ((int) (r + up) & 0xFF);

+	}

+

+	public static int unfilterRowAverage(int r, int left, int up) {

+		return (r + (left + up) / 2) & 0xFF;

+	}

+

+	public static int unfilterRowPaeth(int r, int left, int up, int upleft) { // a = left, b = above, c = upper left

+		return (r + filterPaethPredictor(left, up, upleft)) & 0xFF;

+	}

+

+	final static int filterPaethPredictor(final int a, final int b, final int c) { // a = left, b = above, c = upper

+																					// left

+		// from http://www.libpng.org/pub/png/spec/1.2/PNG-Filters.html

+

+		final int p = a + b - c;// ; initial estimate

+		final int pa = p >= a ? p - a : a - p;

+		final int pb = p >= b ? p - b : b - p;

+		final int pc = p >= c ? p - c : c - p;

+		// ; return nearest of a,b,c,

+		// ; breaking ties in order a,b,c.

+		if (pa <= pb && pa <= pc)

+			return a;

+		else if (pb <= pc)

+			return b;

+		else

+			return c;

+	}

+

+	/*

+	 * we put this methods here so as to not pollute the public interface of PngReader

+	 */

+	public final static void initCrcForTests(PngReader pngr) {

+		pngr.initCrctest();

 	}

 

-	public static int clampTo_128_127(int x) {

-		return x > 127 ? 127 : (x < -128 ? -128 : x);

+	public final static long getCrctestVal(PngReader pngr) {

+		return pngr.getCrctestVal();

 	}

 

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java
index 66c4b49f0..cdad09809 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java
@@ -11,23 +11,24 @@ import jogamp.opengl.util.pngj.chunks.ChunkHelper;
 

 

 /**

- * Reads IDAT chunks

+ * Reads a sequence of contiguous IDAT chunks

  */

 class PngIDatChunkInputStream extends InputStream {

 	private final InputStream inputStream;

 	private final CRC32 crcEngine;

+	private boolean checkCrc = true;

 	private int lenLastChunk;

 	private byte[] idLastChunk = new byte[4];

 	private int toReadThisChunk = 0;

 	private boolean ended = false;

-	private long offset; // offset inside inputstream

+	private long offset; // offset inside whole inputstream (counting bytes before IDAT)

 

 	// just informational

 	static class IdatChunkInfo {

 		public final int len;

-		public final int offset;

+		public final long offset;

 

-		private IdatChunkInfo(int len, int offset) {

+		private IdatChunkInfo(int len, long offset) {

 			this.len = len;

 			this.offset = offset;

 		}

@@ -36,18 +37,20 @@ class PngIDatChunkInputStream extends InputStream {
 	List<IdatChunkInfo> foundChunksInfo = new ArrayList<IdatChunkInfo>();

 

 	/**

-	 * Constructor must be called just after reading length and id of first IDAT chunk

+	 * Constructor must be called just after reading length and id of first IDAT

+	 * chunk

 	 **/

-	PngIDatChunkInputStream(InputStream iStream, int lenFirstChunk, int offset) {

-		this.offset = (long) offset;

+	PngIDatChunkInputStream(InputStream iStream, int lenFirstChunk, long offset) {

+		this.offset = offset;

 		inputStream = iStream;

-		crcEngine = new CRC32();

 		this.lenLastChunk = lenFirstChunk;

 		toReadThisChunk = lenFirstChunk;

 		// we know it's a IDAT

 		System.arraycopy(ChunkHelper.b_IDAT, 0, idLastChunk, 0, 4);

+		crcEngine = new CRC32();

 		crcEngine.update(idLastChunk, 0, 4);

 		foundChunksInfo.add(new IdatChunkInfo(lenLastChunk, offset - 8));

+

 		// PngHelper.logdebug("IDAT Initial fragment: len=" + lenLastChunk);

 		if (this.lenLastChunk == 0)

 			endChunkGoForNext(); // rare, but...

@@ -58,31 +61,33 @@ class PngIDatChunkInputStream extends InputStream {
 	 */

 	@Override

 	public void close() throws IOException {

-		super.close(); // nothing

+		super.close(); // thsi does nothing

 	}

 

 	private void endChunkGoForNext() {

-		// Called after readging the last byte of chunk

+		// Called after readging the last byte of one IDAT chunk

 		// Checks CRC, and read ID from next CHUNK

 		// Those values are left in idLastChunk / lenLastChunk

 		// Skips empty IDATS

 		do {

-			int crc = PngHelper.readInt4(inputStream); //

+			int crc = PngHelperInternal.readInt4(inputStream); //

 			offset += 4;

-			int crccalc = (int) crcEngine.getValue();

-			if (lenLastChunk > 0 && crc != crccalc)

-				throw new PngjBadCrcException("error reading idat; offset: " + offset);

-			crcEngine.reset();

-			lenLastChunk = PngHelper.readInt4(inputStream);

-			if (lenLastChunk < 0)

-				throw new PngjInputException("invalid len for chunk: " + lenLastChunk);

+			if (checkCrc) {

+				int crccalc = (int) crcEngine.getValue();

+				if (lenLastChunk > 0 && crc != crccalc)

+					throw new PngjBadCrcException("error reading idat; offset: " + offset);

+				crcEngine.reset();

+			}

+			lenLastChunk = PngHelperInternal.readInt4(inputStream);

 			toReadThisChunk = lenLastChunk;

-			PngHelper.readBytes(inputStream, idLastChunk, 0, 4);

+			PngHelperInternal.readBytes(inputStream, idLastChunk, 0, 4);

 			offset += 8;

+			// found a NON IDAT chunk? this stream is ended

 			ended = !Arrays.equals(idLastChunk, ChunkHelper.b_IDAT);

 			if (!ended) {

-				foundChunksInfo.add(new IdatChunkInfo(lenLastChunk, (int) (offset - 8)));

-				crcEngine.update(idLastChunk, 0, 4);

+				foundChunksInfo.add(new IdatChunkInfo(lenLastChunk, offset - 8));

+				if (checkCrc)

+					crcEngine.update(idLastChunk, 0, 4);

 			}

 			// PngHelper.logdebug("IDAT ended. next len= " + lenLastChunk + " idat?" +

 			// (!ended));

@@ -91,27 +96,33 @@ class PngIDatChunkInputStream extends InputStream {
 	}

 

 	/**

-	 * sometimes last row read does not fully consumes the chunk here we read the reamaing dummy bytes

+	 * sometimes last row read does not fully consumes the chunk here we read

+	 * the reamaing dummy bytes

 	 */

 	void forceChunkEnd() {

 		if (!ended) {

 			byte[] dummy = new byte[toReadThisChunk];

-			PngHelper.readBytes(inputStream, dummy, 0, toReadThisChunk);

-			crcEngine.update(dummy, 0, toReadThisChunk);

+			PngHelperInternal.readBytes(inputStream, dummy, 0, toReadThisChunk);

+			if (checkCrc)

+				crcEngine.update(dummy, 0, toReadThisChunk);

 			endChunkGoForNext();

 		}

 	}

 

 	/**

-	 * This can return less than len, but never 0 Returns -1 if "pseudo file" ended prematurely. That is our error.

+	 * This can return less than len, but never 0 Returns -1 if "pseudo file"

+	 * ended prematurely. That is our error.

 	 */

 	@Override

 	public int read(byte[] b, int off, int len) throws IOException {

+		if (ended)

+			return -1; // can happen only when raw reading, see Pngreader.readAndSkipsAllRows()

 		if (toReadThisChunk == 0)

-			throw new RuntimeException("this should not happen");

+			throw new PngjExceptionInternal("this should not happen");

 		int n = inputStream.read(b, off, len >= toReadThisChunk ? toReadThisChunk : len);

 		if (n > 0) {

-			crcEngine.update(b, off, n);

+			if (checkCrc)

+				crcEngine.update(b, off, n);

 			this.offset += n;

 			toReadThisChunk -= n;

 		}

@@ -150,4 +161,11 @@ class PngIDatChunkInputStream extends InputStream {
 	boolean isEnded() {

 		return ended;

 	}

+

+	/**

+	 * Disables CRC checking. This can make reading faster

+	 */

+	void disableCrcCheck() {

+		checkCrc = false;

+	}

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkOutputStream.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkOutputStream.java
index 8b9fa5dae..411d18819 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkOutputStream.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkOutputStream.java
@@ -7,23 +7,23 @@ import jogamp.opengl.util.pngj.chunks.ChunkRaw;
 

 

 /**

- * outputs the stream for IDAT chunk , fragmented at fixed size (16384 default).

+ * outputs the stream for IDAT chunk , fragmented at fixed size (32k default).

  */

 class PngIDatChunkOutputStream extends ProgressiveOutputStream {

-	private static final int SIZE_DEFAULT = 16384;

+	private static final int SIZE_DEFAULT = 32768; // 32k

 	private final OutputStream outputStream;

 

 	PngIDatChunkOutputStream(OutputStream outputStream) {

-		this(outputStream, SIZE_DEFAULT);

+		this(outputStream, 0);

 	}

 

 	PngIDatChunkOutputStream(OutputStream outputStream, int size) {

-		super(size);

+		super(size > 0 ? size : SIZE_DEFAULT);

 		this.outputStream = outputStream;

 	}

 

 	@Override

-	public final void flushBuffer(byte[] b, int len) {

+	protected final void flushBuffer(byte[] b, int len) {

 		ChunkRaw c = new ChunkRaw(len, ChunkHelper.b_IDAT, false);

 		c.data = b;

 		c.writeChunk(outputStream);

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java
index 7343893b6..0412beb8c 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java
@@ -1,415 +1,1001 @@
-package jogamp.opengl.util.pngj;

-

-import java.io.InputStream;

-import java.util.ArrayList;

-import java.util.Arrays;

-import java.util.List;

-import java.util.zip.InflaterInputStream;

-

-import jogamp.opengl.util.pngj.PngIDatChunkInputStream.IdatChunkInfo;

-import jogamp.opengl.util.pngj.chunks.ChunkHelper;

-import jogamp.opengl.util.pngj.chunks.ChunkList;

-import jogamp.opengl.util.pngj.chunks.ChunkLoadBehaviour;

-import jogamp.opengl.util.pngj.chunks.ChunkRaw;

-import jogamp.opengl.util.pngj.chunks.PngChunk;

-import jogamp.opengl.util.pngj.chunks.PngChunkIHDR;

-import jogamp.opengl.util.pngj.chunks.PngMetadata;

-

-

-/**

- * Reads a PNG image, line by line

- */

-public class PngReader {

-	/**

-	 * Basic image info - final and inmutable.

-	 */

-	public final ImageInfo imgInfo;

-	protected final String filename; // not necesarily a file, can be a description - merely informative

-

-	private static int MAX_BYTES_CHUNKS_TO_LOAD = 640000;

-	private ChunkLoadBehaviour chunkLoadBehaviour = ChunkLoadBehaviour.LOAD_CHUNK_ALWAYS;

-

-	private final InputStream is;

-	private InflaterInputStream idatIstream;

-	private PngIDatChunkInputStream iIdatCstream;

-

-	protected int currentChunkGroup = -1;

-	protected int rowNum = -1; // current row number

-	private int offset = 0;

-	private int bytesChunksLoaded; // bytes loaded from anciallary chunks

-

-	protected ImageLine imgLine;

-

-	// line as bytes, counting from 1 (index 0 is reserved for filter type)

-	protected byte[] rowb = null;

-	protected byte[] rowbprev = null; // rowb previous

-	protected byte[] rowbfilter = null; // current line 'filtered': exactly as in uncompressed stream

-

-	/**

-	 * All chunks loaded. Criticals are included, except that all IDAT chunks appearance are replaced by a single

-	 * dummy-marker IDAT chunk. These might be copied to the PngWriter

-	 */

-	private final ChunkList chunksList;

-	private final PngMetadata metadata; // this a wrapper over chunks

-

-	/**

-	 * Constructs a PngReader from an InputStream.

-	 * <p>

-	 * See also <code>FileHelper.createPngReader(File f)</code> if available.

-	 * 

-	 * Reads only the signature and first chunk (IDHR)

-	 * 

-	 * @param filenameOrDescription

-	 *            : Optional, can be a filename or a description. Just for error/debug messages

-	 * 

-	 */

-	public PngReader(InputStream inputStream, String filenameOrDescription) {

-		this.filename = filenameOrDescription == null ? "" : filenameOrDescription;

-		this.is = inputStream;

-		this.chunksList = new ChunkList(null);

-		this.metadata = new PngMetadata(chunksList, true);

-		// reads header (magic bytes)

-		byte[] pngid = new byte[PngHelper.pngIdBytes.length];

-		PngHelper.readBytes(is, pngid, 0, pngid.length);

-		offset += pngid.length;

-		if (!Arrays.equals(pngid, PngHelper.pngIdBytes))

-			throw new PngjInputException("Bad PNG signature");

-		// reads first chunk

-		currentChunkGroup = ChunkList.CHUNK_GROUP_0_IDHR;

-		int clen = PngHelper.readInt4(is);

-		offset += 4;

-		if (clen != 13)

-			throw new RuntimeException("IDHR chunk len != 13 ?? " + clen);

-		byte[] chunkid = new byte[4];

-		PngHelper.readBytes(is, chunkid, 0, 4);

-		if (!Arrays.equals(chunkid, ChunkHelper.b_IHDR))

-			throw new PngjInputException("IHDR not found as first chunk??? [" + ChunkHelper.toString(chunkid) + "]");

-		offset += 4;

-		ChunkRaw chunk = new ChunkRaw(clen, chunkid, true);

-		String chunkids = ChunkHelper.toString(chunkid);

-		offset += chunk.readChunkData(is);

-		PngChunkIHDR ihdr = (PngChunkIHDR) addChunkToList(chunk);

-		boolean alpha = (ihdr.getColormodel() & 0x04) != 0;

-		boolean palette = (ihdr.getColormodel() & 0x01) != 0;

-		boolean grayscale = (ihdr.getColormodel() == 0 || ihdr.getColormodel() == 4);

-		imgInfo = new ImageInfo(ihdr.getCols(), ihdr.getRows(), ihdr.getBitspc(), alpha, grayscale, palette);

-		imgLine = new ImageLine(imgInfo);

-		if (ihdr.getInterlaced() != 0)

-			throw new PngjUnsupportedException("PNG interlaced not supported by this library");

-		if (ihdr.getFilmeth() != 0 || ihdr.getCompmeth() != 0)

-			throw new PngjInputException("compmethod o filtermethod unrecognized");

-		if (ihdr.getColormodel() < 0 || ihdr.getColormodel() > 6 || ihdr.getColormodel() == 1

-				|| ihdr.getColormodel() == 5)

-			throw new PngjInputException("Invalid colormodel " + ihdr.getColormodel());

-		if (ihdr.getBitspc() != 1 && ihdr.getBitspc() != 2 && ihdr.getBitspc() != 4 && ihdr.getBitspc() != 8

-				&& ihdr.getBitspc() != 16)

-			throw new PngjInputException("Invalid bit depth " + ihdr.getBitspc());

-		// allocation: one extra byte for filter type one pixel

-		rowbfilter = new byte[imgInfo.bytesPerRow + 1];

-		rowb = new byte[imgInfo.bytesPerRow + 1];

-		rowbprev = new byte[rowb.length];

-	}

-

-	private static class FoundChunkInfo {

-		public final String id;

-		public final int len;

-		public final int offset;

-		public final boolean loaded;

-

-		private FoundChunkInfo(String id, int len, int offset, boolean loaded) {

-			this.id = id;

-			this.len = len;

-			this.offset = offset;

-			this.loaded = loaded;

-		}

-

-		public String toString() {

-			return "chunk " + id + " len=" + len + " offset=" + offset + (this.loaded ? " " : " X ");

-		}

-	}

-

-	private PngChunk addChunkToList(ChunkRaw chunk) {

-		// this requires that the currentChunkGroup is ok

-		PngChunk chunkType = PngChunk.factory(chunk, imgInfo);

-		if (!chunkType.crit) {

-			bytesChunksLoaded += chunk.len;

-		}

-		if (bytesChunksLoaded > MAX_BYTES_CHUNKS_TO_LOAD) {

-			throw new PngjInputException("Chunk exceeded available space (" + MAX_BYTES_CHUNKS_TO_LOAD + ") chunk: "

-					+ chunk + " See PngReader.MAX_BYTES_CHUNKS_TO_LOAD\n");

-		}

-		chunksList.appendReadChunk(chunkType, currentChunkGroup);

-		return chunkType;

-	}

-

-	/**

-	 * Reads chunks before first IDAT. Position before: after IDHR (crc included) Position after: just after the first

-	 * IDAT chunk id

-	 * 

-	 * This can be called several times (tentatively), it does nothing if already run

-	 * 

-	 * (Note: when should this be called? in the constructor? hardly, because we loose the opportunity to call

-	 * setChunkLoadBehaviour() and perhaps other settings before reading the first row? but sometimes we want to access

-	 * some metadata (plte, phys) before. Because of this, this method can be called explicitly but is also called

-	 * implicititly in some methods (getMetatada(), getChunks())

-	 * 

-	 **/

-	public void readFirstChunks() {

-		if (!firstChunksNotYetRead())

-			return;

-		int clen = 0;

-		boolean found = false;

-		byte[] chunkid = new byte[4]; // it's important to reallocate in each iteration

-		currentChunkGroup = ChunkList.CHUNK_GROUP_1_AFTERIDHR;

-		while (!found) {

-			clen = PngHelper.readInt4(is);

-			offset += 4;

-			if (clen < 0)

-				break;

-			PngHelper.readBytes(is, chunkid, 0, 4);

-			offset += 4;

-			if (Arrays.equals(chunkid, ChunkHelper.b_IDAT)) {

-				found = true;

-				currentChunkGroup = ChunkList.CHUNK_GROUP_4_IDAT;

-				// add dummy idat chunk to list

-				ChunkRaw chunk = new ChunkRaw(0, chunkid, false);

-				addChunkToList(chunk);

-				break;

-			} else if (Arrays.equals(chunkid, ChunkHelper.b_IEND)) {

-				throw new PngjInputException("END chunk found before image data (IDAT) at offset=" + offset);

-			}

-			ChunkRaw chunk = new ChunkRaw(clen, chunkid, true);

-			String chunkids = ChunkHelper.toString(chunkid);

-			boolean loadchunk = ChunkHelper.shouldLoad(chunkids, chunkLoadBehaviour);

-			offset += chunk.readChunkData(is);

-			if (chunkids.equals(ChunkHelper.PLTE))

-				currentChunkGroup = ChunkList.CHUNK_GROUP_2_PLTE;

-			if (loadchunk)

-				addChunkToList(chunk);

-			if (chunkids.equals(ChunkHelper.PLTE))

-				currentChunkGroup = ChunkList.CHUNK_GROUP_3_AFTERPLTE;

-		}

-		int idatLen = found ? clen : -1;

-		if (idatLen < 0)

-			throw new PngjInputException("first idat chunk not found!");

-		iIdatCstream = new PngIDatChunkInputStream(is, idatLen, offset);

-		idatIstream = new InflaterInputStream(iIdatCstream);

-	}

-

-	/**

-	 * Reads (and processes) chunks after last IDAT.

-	 **/

-	private void readLastChunks() {

-		// PngHelper.logdebug("idat ended? " + iIdatCstream.isEnded());

-		currentChunkGroup = ChunkList.CHUNK_GROUP_5_AFTERIDAT;

-		if (!iIdatCstream.isEnded())

-			iIdatCstream.forceChunkEnd();

-		int clen = iIdatCstream.getLenLastChunk();

-		byte[] chunkid = iIdatCstream.getIdLastChunk();

-		boolean endfound = false;

-		boolean first = true;

-		boolean ignore = false;

-		while (!endfound) {

-			ignore = false;

-			if (!first) {

-				clen = PngHelper.readInt4(is);

-				offset += 4;

-				if (clen < 0)

-					throw new PngjInputException("bad len " + clen);

-				PngHelper.readBytes(is, chunkid, 0, 4);

-				offset += 4;

-			}

-			first = false;

-			if (Arrays.equals(chunkid, ChunkHelper.b_IDAT)) {

-				// PngHelper.logdebug("extra IDAT chunk len - ignoring : ");

-				ignore = true;

-			} else if (Arrays.equals(chunkid, ChunkHelper.b_IEND)) {

-				currentChunkGroup = ChunkList.CHUNK_GROUP_6_END;

-				endfound = true;

-			}

-			ChunkRaw chunk = new ChunkRaw(clen, chunkid, true);

-			String chunkids = ChunkHelper.toString(chunkid);

-			boolean loadchunk = ChunkHelper.shouldLoad(chunkids, chunkLoadBehaviour);

-			offset += chunk.readChunkData(is);

-			if (loadchunk && !ignore) {

-				addChunkToList(chunk);

-			}

-		}

-		if (!endfound)

-			throw new PngjInputException("end chunk not found - offset=" + offset);

-		// PngHelper.logdebug("end chunk found ok offset=" + offset);

-	}

-

-	/**

-	 * Calls <code>readRow(int[] buffer, int nrow)</code> using internal ImageLine as buffer. This doesn't allocate or

-	 * copy anything.

-	 * 

-	 * @return The ImageLine that also is available inside this object.

-	 */

-	public ImageLine readRow(int nrow) {

-		readRow(imgLine.scanline, nrow);

-		imgLine.filterUsed = FilterType.getByVal(rowbfilter[0]);

-		imgLine.setRown(nrow);

-		return imgLine;

-	}

-

-	/**

-	 * Reads a line and returns it as a int[] array.

-	 * 

-	 * You can pass (optionally) a prealocatted buffer.

-	 * 

-	 * @param buffer

-	 *            Prealocated buffer, or null.

-	 * @param nrow

-	 *            Row number (0 is top). This is mostly for checking, because this library reads rows in sequence.

-	 * 

-	 * @return The scanline in the same passwd buffer if it was allocated, a newly allocated one otherwise

-	 */

-	public int[] readRow(int[] buffer, int nrow) {

-		if (nrow < 0 || nrow >= imgInfo.rows)

-			throw new PngjInputException("invalid line");

-		if (nrow != rowNum + 1)

-			throw new PngjInputException("invalid line (expected: " + (rowNum + 1));

-		if (nrow == 0 && firstChunksNotYetRead())

-			readFirstChunks();

-		rowNum++;

-		if (buffer == null || buffer.length < imgInfo.samplesPerRowP)

-			buffer = new int[imgInfo.samplesPerRowP];

-		// swap

-		byte[] tmp = rowb;

-		rowb = rowbprev;

-		rowbprev = tmp;

-		// loads in rowbfilter "raw" bytes, with filter

-		PngHelper.readBytes(idatIstream, rowbfilter, 0, rowbfilter.length);

-		rowb[0] = 0;

-		unfilterRow();

-		rowb[0] = rowbfilter[0];

-		convertRowFromBytes(buffer);

-		return buffer;

-	}

-

-	/**

-	 * This should be called after having read the last line. It reads extra chunks after IDAT, if present.

-	 */

-	public void end() {

-		offset = (int) iIdatCstream.getOffset();

-		try {

-			idatIstream.close();

-		} catch (Exception e) {

-		}

-		readLastChunks();

-		try {

-			is.close();

-		} catch (Exception e) {

-			throw new PngjInputException("error closing input stream!", e);

-		}

-	}

-

-	private void convertRowFromBytes(int[] buffer) {

-		// http://www.libpng.org/pub/png/spec/1.2/PNG-DataRep.html

-		int i, j;

-		if (imgInfo.bitDepth <= 8) {

-			for (i = 0, j = 1; i < imgInfo.samplesPerRowP; i++) {

-				buffer[i] = (rowb[j++] & 0xFF);

-			}

-		} else { // 16 bitspc

-			for (i = 0, j = 1; i < imgInfo.samplesPerRowP; i++) {

-				buffer[i] = ((rowb[j++] & 0xFF) << 8) + (rowb[j++] & 0xFF);

-			}

-		}

-	}

-

-	private void unfilterRow() {

-		int ftn = rowbfilter[0];

-		FilterType ft = FilterType.getByVal(ftn);

-		if (ft == null)

-			throw new PngjInputException("Filter type " + ftn + " invalid");

-		switch (ft) {

-		case FILTER_NONE:

-			unfilterRowNone();

-			break;

-		case FILTER_SUB:

-			unfilterRowSub();

-			break;

-		case FILTER_UP:

-			unfilterRowUp();

-			break;

-		case FILTER_AVERAGE:

-			unfilterRowAverage();

-			break;

-		case FILTER_PAETH:

-			unfilterRowPaeth();

-			break;

-		default:

-			throw new PngjInputException("Filter type " + ftn + " not implemented");

-		}

-	}

-

-	private void unfilterRowNone() {

-		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

-			rowb[i] = (byte) (rowbfilter[i]);

-		}

-	}

-

-	private void unfilterRowSub() {

-		int i, j;

-		for (i = 1; i <= imgInfo.bytesPixel; i++) {

-			rowb[i] = (byte) (rowbfilter[i]);

-		}

-		for (j = 1, i = imgInfo.bytesPixel + 1; i <= imgInfo.bytesPerRow; i++, j++) {

-			rowb[i] = (byte) (rowbfilter[i] + rowb[j]);

-		}

-	}

-

-	private void unfilterRowUp() {

-		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

-			rowb[i] = (byte) (rowbfilter[i] + rowbprev[i]);

-		}

-	}

-

-	private void unfilterRowAverage() {

-		int i, j, x;

-		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= imgInfo.bytesPerRow; i++, j++) {

-			x = j > 0 ? (rowb[j] & 0xff) : 0;

-			rowb[i] = (byte) (rowbfilter[i] + (x + (rowbprev[i] & 0xFF)) / 2);

-		}

-	}

-

-	private void unfilterRowPaeth() {

-		int i, j, x, y;

-		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= imgInfo.bytesPerRow; i++, j++) {

-			x = j > 0 ? (rowb[j] & 0xFF) : 0;

-			y = j > 0 ? (rowbprev[j] & 0xFF) : 0;

-			rowb[i] = (byte) (rowbfilter[i] + FilterType.filterPaethPredictor(x, rowbprev[i] & 0xFF, y));

-		}

-	}

-

-	public ChunkLoadBehaviour getChunkLoadBehaviour() {

-		return chunkLoadBehaviour;

-	}

-

-	public void setChunkLoadBehaviour(ChunkLoadBehaviour chunkLoadBehaviour) {

-		this.chunkLoadBehaviour = chunkLoadBehaviour;

-	}

-

-	private boolean firstChunksNotYetRead() {

-		return currentChunkGroup < ChunkList.CHUNK_GROUP_1_AFTERIDHR;

-	}

-

-	public ChunkList getChunksList() {

-		if (firstChunksNotYetRead())

-			readFirstChunks();

-		return chunksList;

-	}

-

-	public PngMetadata getMetadata() {

-		if (firstChunksNotYetRead())

-			readFirstChunks();

-		return metadata;

-	}

-

-	public String toString() { // basic info

-		return "filename=" + filename + " " + imgInfo.toString();

-	}

-

-}

+package jogamp.opengl.util.pngj;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.zip.CRC32;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+import jogamp.opengl.util.pngj.ImageLine.SampleType;
+import jogamp.opengl.util.pngj.chunks.ChunkHelper;
+import jogamp.opengl.util.pngj.chunks.ChunkLoadBehaviour;
+import jogamp.opengl.util.pngj.chunks.ChunkRaw;
+import jogamp.opengl.util.pngj.chunks.ChunksList;
+import jogamp.opengl.util.pngj.chunks.PngChunk;
+import jogamp.opengl.util.pngj.chunks.PngChunkIDAT;
+import jogamp.opengl.util.pngj.chunks.PngChunkIHDR;
+import jogamp.opengl.util.pngj.chunks.PngChunkSkipped;
+import jogamp.opengl.util.pngj.chunks.PngMetadata;
+
+/**
+ * Reads a PNG image, line by line.
+ * <p>
+ * The reading sequence is as follows: <br>
+ * 1. At construction time, the header and IHDR chunk are read (basic image
+ * info) <br>
+ * 2. Afterwards you can set some additional global options. Eg.
+ * {@link #setUnpackedMode(boolean)}, {@link #setCrcCheckDisabled()}.<br>
+ * 3. Optional: If you call getMetadata() or getChunksLisk() before start
+ * reading the rows, all the chunks before IDAT are automatically loaded and
+ * available <br>
+ * 4a. The rows are read onen by one of the <tt>readRowXXX</tt> methods:
+ * {@link #readRowInt(int)}, {@link PngReader#readRowByte(int)}, etc, in order,
+ * from 0 to nrows-1 (you can skip or repeat rows, but not go backwards)<br>
+ * 4b. Alternatively, you can read all rows, or a subset, in a single call:
+ * {@link #readRowsInt()}, {@link #readRowsByte()} ,etc. In general this
+ * consumes more memory, but for interlaced images this is equally efficient,
+ * and more so if reading a small subset of rows.<br>
+ * 5. Read of the last row auyomatically loads the trailing chunks, and ends the
+ * reader.<br>
+ * 6. end() forcibly finishes/aborts the reading and closes the stream
+ */
+public class PngReader {
+
+	/**
+	 * Basic image info - final and inmutable.
+	 */
+	public final ImageInfo imgInfo;
+	/**
+	 * not necesarily a filename, can be a description - merely informative
+	 */
+	protected final String filename;
+	private ChunkLoadBehaviour chunkLoadBehaviour = ChunkLoadBehaviour.LOAD_CHUNK_ALWAYS; // see setter/getter
+	private boolean shouldCloseStream = true; // true: closes stream after ending - see setter/getter
+	// some performance/defensive limits
+	private long maxTotalBytesRead = 200 * 1024 * 1024; // 200MB
+	private int maxBytesMetadata = 5 * 1024 * 1024; // for ancillary chunks - see setter/getter
+	private int skipChunkMaxSize = 2 * 1024 * 1024; // chunks exceeding this size will be skipped (nor even CRC checked)
+	private String[] skipChunkIds = { "fdAT" }; // chunks with these ids will be skipped (nor even CRC checked)
+	private HashSet<String> skipChunkIdsSet; // lazily created from skipChunksById
+	protected final PngMetadata metadata; // this a wrapper over chunks
+	protected final ChunksList chunksList;
+	protected ImageLine imgLine;
+	// line as bytes, counting from 1 (index 0 is reserved for filter type)
+	protected final int buffersLen; // nominal length is imgInfo.bytesPerRow + 1 but it can be larger
+	protected byte[] rowb = null;
+	protected byte[] rowbprev = null; // rowb previous
+	protected byte[] rowbfilter = null; // current line 'filtered': exactly as in uncompressed stream
+	// only set for interlaced PNG
+	private final boolean interlaced;
+	private final PngDeinterlacer deinterlacer;
+	private boolean crcEnabled = true;
+	// this only influences the 1-2-4 bitdepth format
+	private boolean unpackedMode = false;
+	private Inflater inflater = null;	// can be reused among several objects. see reuseBuffersFrom()
+	/**
+	 * Current chunk group, (0-6) already read or reading
+	 * <p>
+	 * see {@link ChunksList}
+	 */
+	protected int currentChunkGroup = -1;
+	protected int rowNum = -1; // last read row number, starting from 0
+	private long offset = 0; // offset in InputStream = bytes read
+	private int bytesChunksLoaded; // bytes loaded from anciallary chunks
+	protected final InputStream inputStream;
+	protected InflaterInputStream idatIstream;
+	protected PngIDatChunkInputStream iIdatCstream;
+	protected CRC32 crctest; // If set to non null, it gets a CRC of the unfiltered bytes, to check for images equality
+
+	/**
+	 * Constructs a PngReader from an InputStream.
+	 * <p>
+	 * See also <code>FileHelper.createPngReader(File f)</code> if available.
+	 *
+	 * Reads only the signature and first chunk (IDHR)
+	 *
+	 * @param filenameOrDescription
+	 *            : Optional, can be a filename or a description. Just for
+	 *            error/debug messages
+	 *
+	 */
+	public PngReader(InputStream inputStream, String filenameOrDescription) {
+		this.filename = filenameOrDescription == null ? "" : filenameOrDescription;
+		this.inputStream = inputStream;
+		this.chunksList = new ChunksList(null);
+		this.metadata = new PngMetadata(chunksList);
+		// starts reading: signature
+		byte[] pngid = new byte[8];
+		PngHelperInternal.readBytes(inputStream, pngid, 0, pngid.length);
+		offset += pngid.length;
+		if (!Arrays.equals(pngid, PngHelperInternal.getPngIdSignature()))
+			throw new PngjInputException("Bad PNG signature");
+		// reads first chunk
+		currentChunkGroup = ChunksList.CHUNK_GROUP_0_IDHR;
+		int clen = PngHelperInternal.readInt4(inputStream);
+		offset += 4;
+		if (clen != 13)
+			throw new PngjInputException("IDHR chunk len != 13 ?? " + clen);
+		byte[] chunkid = new byte[4];
+		PngHelperInternal.readBytes(inputStream, chunkid, 0, 4);
+		if (!Arrays.equals(chunkid, ChunkHelper.b_IHDR))
+			throw new PngjInputException("IHDR not found as first chunk??? [" + ChunkHelper.toString(chunkid) + "]");
+		offset += 4;
+		PngChunkIHDR ihdr = (PngChunkIHDR) readChunk(chunkid, clen, false);
+		boolean alpha = (ihdr.getColormodel() & 0x04) != 0;
+		boolean palette = (ihdr.getColormodel() & 0x01) != 0;
+		boolean grayscale = (ihdr.getColormodel() == 0 || ihdr.getColormodel() == 4);
+		// creates ImgInfo and imgLine, and allocates buffers
+		imgInfo = new ImageInfo(ihdr.getCols(), ihdr.getRows(), ihdr.getBitspc(), alpha, grayscale, palette);
+		interlaced = ihdr.getInterlaced() == 1;
+		deinterlacer = interlaced ? new PngDeinterlacer(imgInfo) : null;
+		buffersLen = imgInfo.bytesPerRow + 1;
+		// some checks
+		if (ihdr.getFilmeth() != 0 || ihdr.getCompmeth() != 0 || (ihdr.getInterlaced() & 0xFFFE) != 0)
+			throw new PngjInputException("compression method o filter method or interlaced unrecognized ");
+		if (ihdr.getColormodel() < 0 || ihdr.getColormodel() > 6 || ihdr.getColormodel() == 1
+				|| ihdr.getColormodel() == 5)
+			throw new PngjInputException("Invalid colormodel " + ihdr.getColormodel());
+		if (ihdr.getBitspc() != 1 && ihdr.getBitspc() != 2 && ihdr.getBitspc() != 4 && ihdr.getBitspc() != 8
+				&& ihdr.getBitspc() != 16)
+			throw new PngjInputException("Invalid bit depth " + ihdr.getBitspc());
+	}
+
+	private boolean firstChunksNotYetRead() {
+		return currentChunkGroup < ChunksList.CHUNK_GROUP_1_AFTERIDHR;
+	}
+
+	private void allocateBuffers() { // only if needed
+		if (rowbfilter == null || rowbfilter.length < buffersLen) {
+			rowbfilter = new byte[buffersLen];
+			rowb = new byte[buffersLen];
+			rowbprev = new byte[buffersLen];
+		}
+	}
+
+	/**
+	 * Reads last Internally called after having read the last line. It reads
+	 * extra chunks after IDAT, if present.
+	 */
+	private void readLastAndClose() {
+		// offset = iIdatCstream.getOffset();
+		if (currentChunkGroup < ChunksList.CHUNK_GROUP_5_AFTERIDAT) {
+			try {
+				idatIstream.close();
+			} catch (Exception e) {
+			}
+			readLastChunks();
+		}
+		close();
+	}
+
+	private void close() {
+		if (currentChunkGroup < ChunksList.CHUNK_GROUP_6_END) { // this could only happen if forced close
+			try {
+				idatIstream.close();
+			} catch (Exception e) {
+			}
+			currentChunkGroup = ChunksList.CHUNK_GROUP_6_END;
+		}
+		if (shouldCloseStream) {
+			try {
+				inputStream.close();
+			} catch (Exception e) {
+				throw new PngjInputException("error closing input stream!", e);
+			}
+		}
+	}
+
+	// nbytes: NOT including the filter byte. leaves result in rowb
+	private void unfilterRow(int nbytes) {
+		int ftn = rowbfilter[0];
+		FilterType ft = FilterType.getByVal(ftn);
+		if (ft == null)
+			throw new PngjInputException("Filter type " + ftn + " invalid");
+		switch (ft) {
+		case FILTER_NONE:
+			unfilterRowNone(nbytes);
+			break;
+		case FILTER_SUB:
+			unfilterRowSub(nbytes);
+			break;
+		case FILTER_UP:
+			unfilterRowUp(nbytes);
+			break;
+		case FILTER_AVERAGE:
+			unfilterRowAverage(nbytes);
+			break;
+		case FILTER_PAETH:
+			unfilterRowPaeth(nbytes);
+			break;
+		default:
+			throw new PngjInputException("Filter type " + ftn + " not implemented");
+		}
+		if (crctest != null)
+			crctest.update(rowb, 1, buffersLen - 1);
+	}
+
+	private void unfilterRowAverage(final int nbytes) {
+		int i, j, x;
+		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= nbytes; i++, j++) {
+			x = j > 0 ? (rowb[j] & 0xff) : 0;
+			rowb[i] = (byte) (rowbfilter[i] + (x + (rowbprev[i] & 0xFF)) / 2);
+		}
+	}
+
+	private void unfilterRowNone(final int nbytes) {
+		for (int i = 1; i <= nbytes; i++) {
+			rowb[i] = (byte) (rowbfilter[i]);
+		}
+	}
+
+	private void unfilterRowPaeth(final int nbytes) {
+		int i, j, x, y;
+		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= nbytes; i++, j++) {
+			x = j > 0 ? (rowb[j] & 0xFF) : 0;
+			y = j > 0 ? (rowbprev[j] & 0xFF) : 0;
+			rowb[i] = (byte) (rowbfilter[i] + PngHelperInternal.filterPaethPredictor(x, rowbprev[i] & 0xFF, y));
+		}
+	}
+
+	private void unfilterRowSub(final int nbytes) {
+		int i, j;
+		for (i = 1; i <= imgInfo.bytesPixel; i++) {
+			rowb[i] = (byte) (rowbfilter[i]);
+		}
+		for (j = 1, i = imgInfo.bytesPixel + 1; i <= nbytes; i++, j++) {
+			rowb[i] = (byte) (rowbfilter[i] + rowb[j]);
+		}
+	}
+
+	private void unfilterRowUp(final int nbytes) {
+		for (int i = 1; i <= nbytes; i++) {
+			rowb[i] = (byte) (rowbfilter[i] + rowbprev[i]);
+		}
+	}
+
+	/**
+	 * Reads chunks before first IDAT. Normally this is called automatically
+	 * <p>
+	 * Position before: after IDHR (crc included) Position after: just after the
+	 * first IDAT chunk id
+	 * <P>
+	 * This can be called several times (tentatively), it does nothing if
+	 * already run
+	 * <p>
+	 * (Note: when should this be called? in the constructor? hardly, because we
+	 * loose the opportunity to call setChunkLoadBehaviour() and perhaps other
+	 * settings before reading the first row? but sometimes we want to access
+	 * some metadata (plte, phys) before. Because of this, this method can be
+	 * called explicitly but is also called implicititly in some methods
+	 * (getMetatada(), getChunksList())
+	 */
+	private final void readFirstChunks() {
+		if (!firstChunksNotYetRead())
+			return;
+		int clen = 0;
+		boolean found = false;
+		byte[] chunkid = new byte[4]; // it's important to reallocate in each iteration
+		currentChunkGroup = ChunksList.CHUNK_GROUP_1_AFTERIDHR;
+		while (!found) {
+			clen = PngHelperInternal.readInt4(inputStream);
+			offset += 4;
+			if (clen < 0)
+				break;
+			PngHelperInternal.readBytes(inputStream, chunkid, 0, 4);
+			offset += 4;
+			if (Arrays.equals(chunkid, ChunkHelper.b_IDAT)) {
+				found = true;
+				currentChunkGroup = ChunksList.CHUNK_GROUP_4_IDAT;
+				// add dummy idat chunk to list
+				chunksList.appendReadChunk(new PngChunkIDAT(imgInfo, clen, offset - 8), currentChunkGroup);
+				break;
+			} else if (Arrays.equals(chunkid, ChunkHelper.b_IEND)) {
+				throw new PngjInputException("END chunk found before image data (IDAT) at offset=" + offset);
+			}
+			if (Arrays.equals(chunkid, ChunkHelper.b_PLTE))
+				currentChunkGroup = ChunksList.CHUNK_GROUP_2_PLTE;
+			readChunk(chunkid, clen, false);
+			if (Arrays.equals(chunkid, ChunkHelper.b_PLTE))
+				currentChunkGroup = ChunksList.CHUNK_GROUP_3_AFTERPLTE;
+		}
+		int idatLen = found ? clen : -1;
+		if (idatLen < 0)
+			throw new PngjInputException("first idat chunk not found!");
+		iIdatCstream = new PngIDatChunkInputStream(inputStream, idatLen, offset);
+		if(inflater == null) {
+			inflater = new Inflater();
+		} else {
+		inflater.reset();
+		}
+		idatIstream = new InflaterInputStream(iIdatCstream, inflater);
+		if (!crcEnabled)
+			iIdatCstream.disableCrcCheck();
+	}
+
+	/**
+	 * Reads (and processes) chunks after last IDAT.
+	 **/
+	void readLastChunks() {
+		// PngHelper.logdebug("idat ended? " + iIdatCstream.isEnded());
+		currentChunkGroup = ChunksList.CHUNK_GROUP_5_AFTERIDAT;
+		if (!iIdatCstream.isEnded())
+			iIdatCstream.forceChunkEnd();
+		int clen = iIdatCstream.getLenLastChunk();
+		byte[] chunkid = iIdatCstream.getIdLastChunk();
+		boolean endfound = false;
+		boolean first = true;
+		boolean skip = false;
+		while (!endfound) {
+			skip = false;
+			if (!first) {
+				clen = PngHelperInternal.readInt4(inputStream);
+				offset += 4;
+				if (clen < 0)
+					throw new PngjInputException("bad chuck len " + clen);
+				PngHelperInternal.readBytes(inputStream, chunkid, 0, 4);
+				offset += 4;
+			}
+			first = false;
+			if (Arrays.equals(chunkid, ChunkHelper.b_IDAT)) {
+				skip = true; // extra dummy (empty?) idat chunk, it can happen, ignore it
+			} else if (Arrays.equals(chunkid, ChunkHelper.b_IEND)) {
+				currentChunkGroup = ChunksList.CHUNK_GROUP_6_END;
+				endfound = true;
+			}
+			readChunk(chunkid, clen, skip);
+		}
+		if (!endfound)
+			throw new PngjInputException("end chunk not found - offset=" + offset);
+		// PngHelper.logdebug("end chunk found ok offset=" + offset);
+	}
+
+	/**
+	 * Reads chunkd from input stream, adds to ChunksList, and returns it. If
+	 * it's skipped, a PngChunkSkipped object is created
+	 */
+	private PngChunk readChunk(byte[] chunkid, int clen, boolean skipforced) {
+		if (clen < 0)
+			throw new PngjInputException("invalid chunk lenght: " + clen);
+		// skipChunksByIdSet is created lazyly, if fist IHDR has already been read
+		if (skipChunkIdsSet == null && currentChunkGroup > ChunksList.CHUNK_GROUP_0_IDHR)
+			skipChunkIdsSet = new HashSet<String>(Arrays.asList(skipChunkIds));
+		String chunkidstr = ChunkHelper.toString(chunkid);
+		boolean critical = ChunkHelper.isCritical(chunkidstr);
+		PngChunk pngChunk = null;
+		boolean skip = skipforced;
+		if (maxTotalBytesRead > 0 && clen + offset > maxTotalBytesRead)
+			throw new PngjInputException("Maximum total bytes to read exceeeded: " + maxTotalBytesRead + " offset:"
+					+ offset + " clen=" + clen);
+		// an ancillary chunks can be skipped because of several reasons:
+		if (currentChunkGroup > ChunksList.CHUNK_GROUP_0_IDHR && !critical)
+			skip = skip || (skipChunkMaxSize > 0 && clen >= skipChunkMaxSize) || skipChunkIdsSet.contains(chunkidstr)
+					|| (maxBytesMetadata > 0 && clen > maxBytesMetadata - bytesChunksLoaded)
+					|| !ChunkHelper.shouldLoad(chunkidstr, chunkLoadBehaviour);
+		if (skip) {
+			PngHelperInternal.skipBytes(inputStream, clen);
+			PngHelperInternal.readInt4(inputStream); // skip - we dont call PngHelperInternal.skipBytes(inputStream,
+			// clen + 4) for risk of overflow
+			pngChunk = new PngChunkSkipped(chunkidstr, imgInfo, clen);
+		} else {
+			ChunkRaw chunk = new ChunkRaw(clen, chunkid, true);
+			chunk.readChunkData(inputStream, crcEnabled || critical);
+			pngChunk = PngChunk.factory(chunk, imgInfo);
+			if (!pngChunk.crit)
+				bytesChunksLoaded += chunk.len;
+		}
+		pngChunk.setOffset(offset - 8L);
+		chunksList.appendReadChunk(pngChunk, currentChunkGroup);
+		offset += clen + 4L;
+		return pngChunk;
+	}
+
+	/**
+	 * Logs/prints a warning.
+	 * <p>
+	 * The default behaviour is print to stderr, but it can be overriden.
+	 * <p>
+	 * This happens rarely - most errors are fatal.
+	 */
+	protected void logWarn(String warn) {
+		System.err.println(warn);
+	}
+
+	/**
+	 * @see #setChunkLoadBehaviour(ChunkLoadBehaviour)
+	 */
+	public ChunkLoadBehaviour getChunkLoadBehaviour() {
+		return chunkLoadBehaviour;
+	}
+
+	/**
+	 * Determines which ancillary chunks (metada) are to be loaded
+	 *
+	 * @param chunkLoadBehaviour
+	 *            {@link ChunkLoadBehaviour}
+	 */
+	public void setChunkLoadBehaviour(ChunkLoadBehaviour chunkLoadBehaviour) {
+		this.chunkLoadBehaviour = chunkLoadBehaviour;
+	}
+
+	/**
+	 * All loaded chunks (metada). If we have not yet end reading the image,
+	 * this will include only the chunks before the pixels data (IDAT)
+	 * <p>
+	 * Critical chunks are included, except that all IDAT chunks appearance are
+	 * replaced by a single dummy-marker IDAT chunk. These might be copied to
+	 * the PngWriter
+	 * <p>
+	 *
+	 * @see #getMetadata()
+	 */
+	public ChunksList getChunksList() {
+		if (firstChunksNotYetRead())
+			readFirstChunks();
+		return chunksList;
+	}
+
+	int getCurrentChunkGroup() {
+		return currentChunkGroup;
+	}
+
+	/**
+	 * High level wrapper over chunksList
+	 *
+	 * @see #getChunksList()
+	 */
+	public PngMetadata getMetadata() {
+		if (firstChunksNotYetRead())
+			readFirstChunks();
+		return metadata;
+	}
+
+	/**
+	 * If called for first time, calls readRowInt. Elsewhere, it calls the
+	 * appropiate readRowInt/readRowByte
+	 * <p>
+	 * In general, specifying the concrete readRowInt/readRowByte is preferrable
+	 *
+	 * @see #readRowInt(int) {@link #readRowByte(int)}
+	 */
+	public ImageLine readRow(int nrow) {
+		if (imgLine == null)
+			imgLine = new ImageLine(imgInfo, SampleType.INT, unpackedMode);
+		return imgLine.sampleType != SampleType.BYTE ? readRowInt(nrow) : readRowByte(nrow);
+	}
+
+	/**
+	 * Reads the row as INT, storing it in the {@link #imgLine} property and
+	 * returning it.
+	 *
+	 * The row must be greater or equal than the last read row.
+	 *
+	 * @param nrow
+	 *            Row number, from 0 to rows-1. Increasing order.
+	 * @return ImageLine object, also available as field. Data is in
+	 *         {@link ImageLine#scanline} (int) field.
+	 */
+	public ImageLine readRowInt(int nrow) {
+		if (imgLine == null)
+			imgLine = new ImageLine(imgInfo, SampleType.INT, unpackedMode);
+		if (imgLine.getRown() == nrow) // already read
+			return imgLine;
+		readRowInt(imgLine.scanline, nrow);
+		imgLine.setFilterUsed(FilterType.getByVal(rowbfilter[0]));
+		imgLine.setRown(nrow);
+		return imgLine;
+	}
+
+	/**
+	 * Reads the row as BYTES, storing it in the {@link #imgLine} property and
+	 * returning it.
+	 *
+	 * The row must be greater or equal than the last read row. This method
+	 * allows to pass the same row that was last read.
+	 *
+	 * @param nrow
+	 *            Row number, from 0 to rows-1. Increasing order.
+	 * @return ImageLine object, also available as field. Data is in
+	 *         {@link ImageLine#scanlineb} (byte) field.
+	 */
+	public ImageLine readRowByte(int nrow) {
+		if (imgLine == null)
+			imgLine = new ImageLine(imgInfo, SampleType.BYTE, unpackedMode);
+		if (imgLine.getRown() == nrow) // already read
+			return imgLine;
+		readRowByte(imgLine.scanlineb, nrow);
+		imgLine.setFilterUsed(FilterType.getByVal(rowbfilter[0]));
+		imgLine.setRown(nrow);
+		return imgLine;
+	}
+
+	/**
+	 * @see #readRowInt(int[], int)
+	 */
+	public final int[] readRow(int[] buffer, final int nrow) {
+		return readRowInt(buffer, nrow);
+	}
+
+	/**
+	 * Reads a line and returns it as a int[] array.
+	 * <p>
+	 * You can pass (optionally) a prealocatted buffer.
+	 * <p>
+	 * If the bitdepth is less than 8, the bytes are packed - unless
+	 * {@link #unpackedMode} is true.
+	 *
+	 * @param buffer
+	 *            Prealocated buffer, or null.
+	 * @param nrow
+	 *            Row number (0 is top). Most be strictly greater than the last
+	 *            read row.
+	 *
+	 * @return The scanline in the same passwd buffer if it was allocated, a
+	 *         newly allocated one otherwise
+	 */
+	public final int[] readRowInt(int[] buffer, final int nrow) {
+		if (buffer == null)
+			buffer = new int[unpackedMode ? imgInfo.samplesPerRow : imgInfo.samplesPerRowPacked];
+		if (!interlaced) {
+			if (nrow <= rowNum)
+				throw new PngjInputException("rows must be read in increasing order: " + nrow);
+			int bytesread = 0;
+			while (rowNum < nrow)
+				bytesread = readRowRaw(rowNum + 1); // read rows, perhaps skipping if necessary
+			decodeLastReadRowToInt(buffer, bytesread);
+		} else { // interlaced
+			if (deinterlacer.getImageInt() == null)
+				deinterlacer.setImageInt(readRowsInt().scanlines); // read all image and store it in deinterlacer
+			System.arraycopy(deinterlacer.getImageInt()[nrow], 0, buffer, 0, unpackedMode ? imgInfo.samplesPerRow
+					: imgInfo.samplesPerRowPacked);
+		}
+		return buffer;
+	}
+
+	/**
+	 * Reads a line and returns it as a byte[] array.
+	 * <p>
+	 * You can pass (optionally) a prealocatted buffer.
+	 * <p>
+	 * If the bitdepth is less than 8, the bytes are packed - unless
+	 * {@link #unpackedMode} is true. <br>
+	 * If the bitdepth is 16, the least significant byte is lost.
+	 * <p>
+	 *
+	 * @param buffer
+	 *            Prealocated buffer, or null.
+	 * @param nrow
+	 *            Row number (0 is top). Most be strictly greater than the last
+	 *            read row.
+	 *
+	 * @return The scanline in the same passwd buffer if it was allocated, a
+	 *         newly allocated one otherwise
+	 */
+	public final byte[] readRowByte(byte[] buffer, final int nrow) {
+		if (buffer == null)
+			buffer = new byte[unpackedMode ? imgInfo.samplesPerRow : imgInfo.samplesPerRowPacked];
+		if (!interlaced) {
+			if (nrow <= rowNum)
+				throw new PngjInputException("rows must be read in increasing order: " + nrow);
+			int bytesread = 0;
+			while (rowNum < nrow)
+				bytesread = readRowRaw(rowNum + 1); // read rows, perhaps skipping if necessary
+			decodeLastReadRowToByte(buffer, bytesread);
+		} else { // interlaced
+			if (deinterlacer.getImageByte() == null)
+				deinterlacer.setImageByte(readRowsByte().scanlinesb); // read all image and store it in deinterlacer
+			System.arraycopy(deinterlacer.getImageByte()[nrow], 0, buffer, 0, unpackedMode ? imgInfo.samplesPerRow
+					: imgInfo.samplesPerRowPacked);
+		}
+		return buffer;
+	}
+
+	/**
+	 * @param nrow
+	 * @deprecated Now {@link #readRow(int)} implements the same funcion. This
+	 *             method will be removed in future releases
+	 */
+	public ImageLine getRow(int nrow) {
+		return readRow(nrow);
+	}
+
+	private void decodeLastReadRowToInt(int[] buffer, int bytesRead) {
+		if (imgInfo.bitDepth <= 8)
+			for (int i = 0, j = 1; i < bytesRead; i++)
+				buffer[i] = (rowb[j++] & 0xFF); // http://www.libpng.org/pub/png/spec/1.2/PNG-DataRep.html
+		else
+			for (int i = 0, j = 1; j <= bytesRead; i++)
+				buffer[i] = ((rowb[j++] & 0xFF) << 8) + (rowb[j++] & 0xFF); // 16 bitspc
+		if (imgInfo.packed && unpackedMode)
+			ImageLine.unpackInplaceInt(imgInfo, buffer, buffer, false);
+	}
+
+	private void decodeLastReadRowToByte(byte[] buffer, int bytesRead) {
+		if (imgInfo.bitDepth <= 8)
+			System.arraycopy(rowb, 1, buffer, 0, bytesRead);
+		else
+			for (int i = 0, j = 1; j < bytesRead; i++, j += 2)
+				buffer[i] = rowb[j];// 16 bits in 1 byte: this discards the LSB!!!
+		if (imgInfo.packed && unpackedMode)
+			ImageLine.unpackInplaceByte(imgInfo, buffer, buffer, false);
+	}
+
+	/**
+	 * Reads a set of lines and returns it as a ImageLines object, which wraps
+	 * matrix. Internally it reads all lines, but decodes and stores only the
+	 * wanted ones. This starts and ends the reading, and cannot be combined
+	 * with other reading methods.
+	 * <p>
+	 * This it's more efficient (speed an memory) that doing calling
+	 * readRowInt() for each desired line only if the image is interlaced.
+	 * <p>
+	 * Notice that the columns in the matrix is not the pixel width of the
+	 * image, but rather pixels x channels
+	 *
+	 * @see #readRowInt(int) to read about the format of each row
+	 *
+	 * @param rowOffset
+	 *            Number of rows to be skipped
+	 * @param nRows
+	 *            Total number of rows to be read. -1: read all available
+	 * @param rowStep
+	 *            Row increment. If 1, we read consecutive lines; if 2, we read
+	 *            even/odd lines, etc
+	 * @return Set of lines as a ImageLines, which wraps a matrix
+	 */
+	public ImageLines readRowsInt(int rowOffset, int nRows, int rowStep) {
+		if (nRows < 0)
+			nRows = (imgInfo.rows - rowOffset) / rowStep;
+		if (rowStep < 1 || rowOffset < 0 || nRows * rowStep + rowOffset > imgInfo.rows)
+			throw new PngjInputException("bad args");
+		ImageLines imlines = new ImageLines(imgInfo, SampleType.INT, unpackedMode, rowOffset, nRows, rowStep);
+		if (!interlaced) {
+			for (int j = 0; j < imgInfo.rows; j++) {
+				int bytesread = readRowRaw(j); // read and perhaps discards
+				int mrow = imlines.imageRowToMatrixRowStrict(j);
+				if (mrow >= 0)
+					decodeLastReadRowToInt(imlines.scanlines[mrow], bytesread);
+			}
+		} else { // and now, for something completely different (interlaced)
+			int[] buf = new int[unpackedMode ? imgInfo.samplesPerRow : imgInfo.samplesPerRowPacked];
+			for (int p = 1; p <= 7; p++) {
+				deinterlacer.setPass(p);
+				for (int i = 0; i < deinterlacer.getRows(); i++) {
+					int bytesread = readRowRaw(i);
+					int j = deinterlacer.getCurrRowReal();
+					int mrow = imlines.imageRowToMatrixRowStrict(j);
+					if (mrow >= 0) {
+						decodeLastReadRowToInt(buf, bytesread);
+						deinterlacer.deinterlaceInt(buf, imlines.scanlines[mrow], !unpackedMode);
+					}
+				}
+			}
+		}
+		end();
+		return imlines;
+	}
+
+	/**
+	 * Same as readRowsInt(0, imgInfo.rows, 1)
+	 *
+	 * @see #readRowsInt(int, int, int)
+	 */
+	public ImageLines readRowsInt() {
+		return readRowsInt(0, imgInfo.rows, 1);
+	}
+
+	/**
+	 * Reads a set of lines and returns it as a ImageLines object, which wrapas
+	 * a byte[][] matrix. Internally it reads all lines, but decodes and stores
+	 * only the wanted ones. This starts and ends the reading, and cannot be
+	 * combined with other reading methods.
+	 * <p>
+	 * This it's more efficient (speed an memory) that doing calling
+	 * readRowByte() for each desired line only if the image is interlaced.
+	 * <p>
+	 * Notice that the columns in the matrix is not the pixel width of the
+	 * image, but rather pixels x channels
+	 *
+	 * @see #readRowByte(int) to read about the format of each row. Notice that
+	 *      if the bitdepth is 16 this will lose information
+	 *
+	 * @param rowOffset
+	 *            Number of rows to be skipped
+	 * @param nRows
+	 *            Total number of rows to be read. -1: read all available
+	 * @param rowStep
+	 *            Row increment. If 1, we read consecutive lines; if 2, we read
+	 *            even/odd lines, etc
+	 * @return Set of lines as a matrix
+	 */
+	public ImageLines readRowsByte(int rowOffset, int nRows, int rowStep) {
+		if (nRows < 0)
+			nRows = (imgInfo.rows - rowOffset) / rowStep;
+		if (rowStep < 1 || rowOffset < 0 || nRows * rowStep + rowOffset > imgInfo.rows)
+			throw new PngjInputException("bad args");
+		ImageLines imlines = new ImageLines(imgInfo, SampleType.BYTE, unpackedMode, rowOffset, nRows, rowStep);
+		if (!interlaced) {
+			for (int j = 0; j < imgInfo.rows; j++) {
+				int bytesread = readRowRaw(j); // read and perhaps discards
+				int mrow = imlines.imageRowToMatrixRowStrict(j);
+				if (mrow >= 0)
+					decodeLastReadRowToByte(imlines.scanlinesb[mrow], bytesread);
+			}
+		} else { // and now, for something completely different (interlaced)
+			byte[] buf = new byte[unpackedMode ? imgInfo.samplesPerRow : imgInfo.samplesPerRowPacked];
+			for (int p = 1; p <= 7; p++) {
+				deinterlacer.setPass(p);
+				for (int i = 0; i < deinterlacer.getRows(); i++) {
+					int bytesread = readRowRaw(i);
+					int j = deinterlacer.getCurrRowReal();
+					int mrow = imlines.imageRowToMatrixRowStrict(j);
+					if (mrow >= 0) {
+						decodeLastReadRowToByte(buf, bytesread);
+						deinterlacer.deinterlaceByte(buf, imlines.scanlinesb[mrow], !unpackedMode);
+					}
+				}
+			}
+		}
+		end();
+		return imlines;
+	}
+
+	/**
+	 * Same as readRowsByte(0, imgInfo.rows, 1)
+	 *
+	 * @see #readRowsByte(int, int, int)
+	 */
+	public ImageLines readRowsByte() {
+		return readRowsByte(0, imgInfo.rows, 1);
+	}
+
+	/*
+	 * For the interlaced case, nrow indicates the subsampled image - the pass must be set already.
+	 *
+	 * This must be called in strict order, both for interlaced or no interlaced.
+	 *
+	 * Updates rowNum.
+	 *
+	 * Leaves raw result in rowb
+	 *
+	 * Returns bytes actually read (not including the filter byte)
+	 */
+	private int readRowRaw(final int nrow) {
+		if (nrow == 0) {
+			if (firstChunksNotYetRead())
+				readFirstChunks();
+			allocateBuffers();
+			if (interlaced)
+				Arrays.fill(rowb, (byte) 0); // new subimage: reset filters: this is enough, see the swap that happens lines
+		}
+		// below
+		int bytesRead = imgInfo.bytesPerRow; // NOT including the filter byte
+		if (interlaced) {
+			if (nrow < 0 || nrow > deinterlacer.getRows() || (nrow != 0 && nrow != deinterlacer.getCurrRowSubimg() + 1))
+				throw new PngjInputException("invalid row in interlaced mode: " + nrow);
+			deinterlacer.setRow(nrow);
+			bytesRead = (imgInfo.bitspPixel * deinterlacer.getPixelsToRead() + 7) / 8;
+			if (bytesRead < 1)
+				throw new PngjExceptionInternal("wtf??");
+		} else { // check for non interlaced
+			if (nrow < 0 || nrow >= imgInfo.rows || nrow != rowNum + 1)
+				throw new PngjInputException("invalid row: " + nrow);
+		}
+		rowNum = nrow;
+		// swap buffers
+		byte[] tmp = rowb;
+		rowb = rowbprev;
+		rowbprev = tmp;
+		// loads in rowbfilter "raw" bytes, with filter
+		PngHelperInternal.readBytes(idatIstream, rowbfilter, 0, bytesRead + 1);
+		offset = iIdatCstream.getOffset();
+		if (offset < 0)
+			throw new PngjExceptionInternal("bad offset ??" + offset);
+		if (maxTotalBytesRead > 0 && offset >= maxTotalBytesRead)
+			throw new PngjInputException("Reading IDAT: Maximum total bytes to read exceeeded: " + maxTotalBytesRead
+					+ " offset:" + offset);
+		rowb[0] = 0;
+		unfilterRow(bytesRead);
+		rowb[0] = rowbfilter[0];
+		if ((rowNum == imgInfo.rows - 1 && !interlaced) || (interlaced && deinterlacer.isAtLastRow()))
+			readLastAndClose();
+		return bytesRead;
+	}
+
+	/**
+	 * Reads all the (remaining) file, skipping the pixels data. This is much
+	 * more efficient that calling readRow(), specially for big files (about 10
+	 * times faster!), because it doesn't even decompress the IDAT stream and
+	 * disables CRC check Use this if you are not interested in reading
+	 * pixels,only metadata.
+	 */
+	public void readSkippingAllRows() {
+		if (firstChunksNotYetRead())
+			readFirstChunks();
+		// we read directly from the compressed stream, we dont decompress nor chec CRC
+		iIdatCstream.disableCrcCheck();
+		allocateBuffers();
+		try {
+			int r;
+			do {
+				r = iIdatCstream.read(rowbfilter, 0, buffersLen);
+			} while (r >= 0);
+		} catch (IOException e) {
+			throw new PngjInputException("error in raw read of IDAT", e);
+		}
+		offset = iIdatCstream.getOffset();
+		if (offset < 0)
+			throw new PngjExceptionInternal("bad offset ??" + offset);
+		if (maxTotalBytesRead > 0 && offset >= maxTotalBytesRead)
+			throw new PngjInputException("Reading IDAT: Maximum total bytes to read exceeeded: " + maxTotalBytesRead
+					+ " offset:" + offset);
+		readLastAndClose();
+	}
+
+	/**
+	 * Set total maximum bytes to read (0: unlimited; default: 200MB). <br>
+	 * These are the bytes read (not loaded) in the input stream. If exceeded,
+	 * an exception will be thrown.
+	 */
+	public void setMaxTotalBytesRead(long maxTotalBytesToRead) {
+		this.maxTotalBytesRead = maxTotalBytesToRead;
+	}
+
+	/**
+	 * @return Total maximum bytes to read.
+	 */
+	public long getMaxTotalBytesRead() {
+		return maxTotalBytesRead;
+	}
+
+	/**
+	 * Set total maximum bytes to load from ancillary chunks (0: unlimited;
+	 * default: 5Mb).<br>
+	 * If exceeded, some chunks will be skipped
+	 */
+	public void setMaxBytesMetadata(int maxBytesChunksToLoad) {
+		this.maxBytesMetadata = maxBytesChunksToLoad;
+	}
+
+	/**
+	 * @return Total maximum bytes to load from ancillary ckunks.
+	 */
+	public int getMaxBytesMetadata() {
+		return maxBytesMetadata;
+	}
+
+	/**
+	 * Set maximum size in bytes for individual ancillary chunks (0: unlimited;
+	 * default: 2MB). <br>
+	 * Chunks exceeding this length will be skipped (the CRC will not be
+	 * checked) and the chunk will be saved as a PngChunkSkipped object. See
+	 * also setSkipChunkIds
+	 */
+	public void setSkipChunkMaxSize(int skipChunksBySize) {
+		this.skipChunkMaxSize = skipChunksBySize;
+	}
+
+	/**
+	 * @return maximum size in bytes for individual ancillary chunks.
+	 */
+	public int getSkipChunkMaxSize() {
+		return skipChunkMaxSize;
+	}
+
+	/**
+	 * Chunks ids to be skipped. <br>
+	 * These chunks will be skipped (the CRC will not be checked) and the chunk
+	 * will be saved as a PngChunkSkipped object. See also setSkipChunkMaxSize
+	 */
+	public void setSkipChunkIds(String[] skipChunksById) {
+		this.skipChunkIds = skipChunksById == null ? new String[] {} : skipChunksById;
+	}
+
+	/**
+	 * @return Chunk-IDs to be skipped.
+	 */
+	public String[] getSkipChunkIds() {
+		return skipChunkIds;
+	}
+
+	/**
+	 * if true, input stream will be closed after ending read
+	 * <p>
+	 * default=true
+	 */
+	public void setShouldCloseStream(boolean shouldCloseStream) {
+		this.shouldCloseStream = shouldCloseStream;
+	}
+
+	/**
+	 * Normally this does nothing, but it can be used to force a premature
+	 * closing. Its recommended practice to call it after reading the image
+	 * pixels.
+	 */
+	public void end() {
+		if (currentChunkGroup < ChunksList.CHUNK_GROUP_6_END)
+			close();
+	}
+
+	/**
+	 * Interlaced PNG is accepted -though not welcomed- now...
+	 */
+	public boolean isInterlaced() {
+		return interlaced;
+	}
+
+	/**
+	 * set/unset "unpackedMode"<br>
+	 * If false (default) packed types (bitdepth=1,2 or 4) will keep several
+	 * samples packed in one element (byte or int) <br>
+	 * If true, samples will be unpacked on reading, and each element in the
+	 * scanline will be sample. This implies more processing and memory, but
+	 * it's the most efficient option if you intend to read individual pixels. <br>
+	 * This option should only be set before start reading.
+	 *
+	 * @param unPackedMode
+	 */
+	public void setUnpackedMode(boolean unPackedMode) {
+		this.unpackedMode = unPackedMode;
+	}
+
+	/**
+	 * @see PngReader#setUnpackedMode(boolean)
+	 */
+	public boolean isUnpackedMode() {
+		return unpackedMode;
+	}
+
+	/**
+	 * Tries to reuse the allocated buffers from other already used PngReader
+	 * object. This will have no effect if the buffers are smaller than necessary.
+	 * It also reuses the inflater.
+	 *
+	 * @param other A PngReader that has already finished reading pixels. Can be null.
+	 */
+	public void reuseBuffersFrom(PngReader other) {
+		if(other==null) return;
+		if (other.currentChunkGroup < ChunksList.CHUNK_GROUP_5_AFTERIDAT)
+			throw new PngjInputException("PngReader to be reused have not yet ended reading pixels");
+		if (other.rowbfilter != null && other.rowbfilter.length >= buffersLen) {
+			rowbfilter = other.rowbfilter;
+			rowb = other.rowb;
+			rowbprev = other.rowbprev;
+		}
+		inflater = other.inflater;
+	}
+
+	/**
+	 * Disables the CRC integrity check in IDAT chunks and ancillary chunks,
+	 * this gives a slight increase in reading speed for big files
+	 */
+	public void setCrcCheckDisabled() {
+		crcEnabled = false;
+	}
+
+	/**
+	 * Just for testing. TO be called after ending reading, only if
+	 * initCrctest() was called before start
+	 *
+	 * @return CRC of the raw pixels values
+	 */
+	long getCrctestVal() {
+		return crctest.getValue();
+	}
+
+	/**
+	 * Inits CRC object and enables CRC calculation
+	 */
+	void initCrctest() {
+		this.crctest = new CRC32();
+	}
+
+	/**
+	 * Basic info, for debugging.
+	 */
+	@Override
+	public String toString() { // basic info
+		return "filename=" + filename + " " + imgInfo.toString();
+	}
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngWriter.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngWriter.java
index ee8472bf0..2f475aab1 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngWriter.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngWriter.java
@@ -7,54 +7,88 @@ import java.util.List;
 import java.util.zip.Deflater;

 import java.util.zip.DeflaterOutputStream;

 

+import jogamp.opengl.util.pngj.ImageLine.SampleType;

 import jogamp.opengl.util.pngj.chunks.ChunkCopyBehaviour;

 import jogamp.opengl.util.pngj.chunks.ChunkHelper;

-import jogamp.opengl.util.pngj.chunks.ChunkList;

+import jogamp.opengl.util.pngj.chunks.ChunksList;

+import jogamp.opengl.util.pngj.chunks.ChunksListForWrite;

 import jogamp.opengl.util.pngj.chunks.PngChunk;

 import jogamp.opengl.util.pngj.chunks.PngChunkIEND;

 import jogamp.opengl.util.pngj.chunks.PngChunkIHDR;

+import jogamp.opengl.util.pngj.chunks.PngChunkSkipped;

 import jogamp.opengl.util.pngj.chunks.PngChunkTextVar;

 import jogamp.opengl.util.pngj.chunks.PngMetadata;

 

-

 /**

- * Writes a PNG image, line by line.

+ * Writes a PNG image

  */

 public class PngWriter {

 

 	public final ImageInfo imgInfo;

 

-	protected int compLevel = 6; // zip compression level 0 - 9

-	private int deflaterStrategy = Deflater.FILTERED;

-	protected FilterWriteStrategy filterStrat;

+	private final String filename; // optional, can be a description

+

+	/**

+	 * last read row number, starting from 0

+	 */

+	protected int rowNum = -1;

 

+	private final ChunksListForWrite chunksList;

+

+	private final PngMetadata metadata; // high level wrapper over chunkList

+

+	/**

+	 * Current chunk grounp, (0-6) already read or reading

+	 * <p>

+	 * see {@link ChunksList}

+	 */

 	protected int currentChunkGroup = -1;

-	protected int rowNum = -1; // current line number

 

-	// current line, one (packed) sample per element (layout differnt from rowb!)

-	protected int[] scanline = null;

-	protected byte[] rowb = null; // element 0 is filter type!

-	protected byte[] rowbprev = null; // rowb prev

-	protected byte[] rowbfilter = null; // current line with filter

+	/**

+	 * PNG filter strategy

+	 */

+	protected FilterWriteStrategy filterStrat;

 

-	protected final OutputStream os;

-	protected final String filename; // optional, can be a description

+	/**

+	 * zip compression level 0 - 9

+	 */

+	private int compLevel = 6;

+	private boolean shouldCloseStream = true; // true: closes stream after ending write

 

 	private PngIDatChunkOutputStream datStream;

+

 	private DeflaterOutputStream datStreamDeflated;

 

-	private final ChunkList chunkList;

-	private final PngMetadata metadata; // high level wrapper over chunkList

+	/**

+	 * Deflate algortithm compression strategy

+	 */

+	private int deflaterStrategy = Deflater.FILTERED;

+

+	private int[] histox = new int[256]; // auxiliar buffer, only used by reportResultsForFilter

+

+	private int idatMaxSize = 0; // 0=use default (PngIDatChunkOutputStream 32768)

+

+	private final OutputStream os;

+

+	protected byte[] rowb = null; // element 0 is filter type!

+	protected byte[] rowbfilter = null; // current line with filter

+

+	protected byte[] rowbprev = null; // rowb prev

+

+	// this only influences the 1-2-4 bitdepth format - and if we pass a ImageLine to writeRow, this is ignored

+	private boolean unpackedMode = false;

 

 	public PngWriter(OutputStream outputStream, ImageInfo imgInfo) {

 		this(outputStream, imgInfo, "[NO FILENAME AVAILABLE]");

 	}

 

 	/**

-	 * Constructs a new PngWriter from a output stream.

+	 * Constructs a new PngWriter from a output stream. After construction

+	 * nothing is writen yet. You still can set some parameters (compression,

+	 * filters) and queue chunks before start writing the pixels.

 	 * <p>

 	 * See also <code>FileHelper.createPngWriter()</code> if available.

-	 * 

+	 *

 	 * @param outputStream

 	 *            Opened stream for binary writing

 	 * @param imgInfo

@@ -67,171 +101,156 @@ public class PngWriter {
 		this.os = outputStream;

 		this.imgInfo = imgInfo;

 		// prealloc

-		scanline = new int[imgInfo.samplesPerRowP];

 		rowb = new byte[imgInfo.bytesPerRow + 1];

 		rowbprev = new byte[rowb.length];

 		rowbfilter = new byte[rowb.length];

-		datStream = new PngIDatChunkOutputStream(this.os);

-		chunkList = new ChunkList(imgInfo);

-		metadata = new PngMetadata(chunkList, false);

-		filterStrat = new FilterWriteStrategy(imgInfo, FilterType.FILTER_DEFAULT);

+		chunksList = new ChunksListForWrite(imgInfo);

+		metadata = new PngMetadata(chunksList);

+		filterStrat = new FilterWriteStrategy(imgInfo, FilterType.FILTER_DEFAULT); // can be changed

 	}

 

-	/**

-	 * Write id signature and also "IHDR" chunk

-	 */

-	private void writeSignatureAndIHDR() {

-		currentChunkGroup = ChunkList.CHUNK_GROUP_0_IDHR;

-		if (datStreamDeflated == null) {

-			Deflater def = new Deflater(compLevel);

-			def.setStrategy(deflaterStrategy);

-			datStreamDeflated = new DeflaterOutputStream(datStream, def, 8192);

+	private void init() {

+		datStream = new PngIDatChunkOutputStream(this.os, idatMaxSize);

+		Deflater def = new Deflater(compLevel);

+		def.setStrategy(deflaterStrategy);

+		datStreamDeflated = new DeflaterOutputStream(datStream, def);

+		writeSignatureAndIHDR();

+		writeFirstChunks();

+	}

+

+	private void reportResultsForFilter(int rown, FilterType type, boolean tentative) {

+		Arrays.fill(histox, 0);

+		int s = 0, v;

+		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

+			v = rowbfilter[i];

+			if (v < 0)

+				s -= (int) v;

+			else

+				s += (int) v;

+			histox[v & 0xFF]++;

 		}

-		PngHelper.writeBytes(os, PngHelper.pngIdBytes); // signature

-		PngChunkIHDR ihdr = new PngChunkIHDR(imgInfo);

-		// http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html

-		ihdr.setCols(imgInfo.cols);

-		ihdr.setRows(imgInfo.rows);

-		ihdr.setBitspc(imgInfo.bitDepth);

-		int colormodel = 0;

-		if (imgInfo.alpha)

-			colormodel += 0x04;

-		if (imgInfo.indexed)

-			colormodel += 0x01;

-		if (!imgInfo.greyscale)

-			colormodel += 0x02;

-		ihdr.setColormodel(colormodel);

-		ihdr.setCompmeth(0); // compression method 0=deflate

-		ihdr.setFilmeth(0); // filter method (0)

-		ihdr.setInterlaced(0); // we never interlace

-		ihdr.createChunk().writeChunk(os);

+		filterStrat.fillResultsForFilter(rown, type, s, histox, tentative);

+	}

 

+	private void writeEndChunk() {

+		PngChunkIEND c = new PngChunkIEND(imgInfo);

+		c.createRawChunk().writeChunk(os);

 	}

 

 	private void writeFirstChunks() {

 		int nw = 0;

-		currentChunkGroup = ChunkList.CHUNK_GROUP_1_AFTERIDHR;

-		nw = chunkList.writeChunks(os, currentChunkGroup);

-		currentChunkGroup = ChunkList.CHUNK_GROUP_2_PLTE;

-		nw = chunkList.writeChunks(os, currentChunkGroup);

+		currentChunkGroup = ChunksList.CHUNK_GROUP_1_AFTERIDHR;

+		nw = chunksList.writeChunks(os, currentChunkGroup);

+		currentChunkGroup = ChunksList.CHUNK_GROUP_2_PLTE;

+		nw = chunksList.writeChunks(os, currentChunkGroup);

 		if (nw > 0 && imgInfo.greyscale)

 			throw new PngjOutputException("cannot write palette for this format");

 		if (nw == 0 && imgInfo.indexed)

 			throw new PngjOutputException("missing palette");

-		currentChunkGroup = ChunkList.CHUNK_GROUP_3_AFTERPLTE;

-		nw = chunkList.writeChunks(os, currentChunkGroup);

-		currentChunkGroup = ChunkList.CHUNK_GROUP_4_IDAT;

+		currentChunkGroup = ChunksList.CHUNK_GROUP_3_AFTERPLTE;

+		nw = chunksList.writeChunks(os, currentChunkGroup);

+		currentChunkGroup = ChunksList.CHUNK_GROUP_4_IDAT;

 	}

 

 	private void writeLastChunks() { // not including end

-		currentChunkGroup = ChunkList.CHUNK_GROUP_5_AFTERIDAT;

-		chunkList.writeChunks(os, currentChunkGroup);

+		currentChunkGroup = ChunksList.CHUNK_GROUP_5_AFTERIDAT;

+		chunksList.writeChunks(os, currentChunkGroup);

 		// should not be unwriten chunks

-		List<PngChunk> pending = chunkList.getQueuedChunks();

+		List<PngChunk> pending = chunksList.getQueuedChunks();

 		if (!pending.isEmpty())

 			throw new PngjOutputException(pending.size() + " chunks were not written! Eg: " + pending.get(0).toString());

-		currentChunkGroup = ChunkList.CHUNK_GROUP_6_END;

-	}

-

-	private void writeEndChunk() {

-		PngChunkIEND c = new PngChunkIEND(imgInfo);

-		c.createChunk().writeChunk(os);

+		currentChunkGroup = ChunksList.CHUNK_GROUP_6_END;

 	}

 

 	/**

-	 * Writes a full image row. This must be called sequentially from n=0 to n=rows-1 One integer per sample , in the

-	 * natural order: R G B R G B ... (or R G B A R G B A... if has alpha) The values should be between 0 and 255 for 8

-	 * bitspc images, and between 0- 65535 form 16 bitspc images (this applies also to the alpha channel if present) The

-	 * array can be reused.

-	 * 

-	 * @param newrow

-	 *            Array of pixel values

-	 * @param rown

-	 *            Row number, from 0 (top) to rows-1 (bottom). This is just used as a check. Pass -1 if you want to

-	 *            autocompute it

+	 * Write id signature and also "IHDR" chunk

 	 */

-	public void writeRow(int[] newrow, int rown) {

-		if (rown == 0) {

-			writeSignatureAndIHDR();

-			writeFirstChunks();

-		}

-		if (rown < -1 || rown > imgInfo.rows)

-			throw new RuntimeException("invalid value for row " + rown);

-		rowNum++;

-		if (rown >= 0 && rowNum != rown)

-			throw new RuntimeException("rows must be written in strict consecutive order: tried to write row " + rown

-					+ ", expected=" + rowNum);

-		scanline = newrow;

-		// swap

-		byte[] tmp = rowb;

-		rowb = rowbprev;

-		rowbprev = tmp;

-		convertRowToBytes();

-		filterRow(rown);

-		try {

-			datStreamDeflated.write(rowbfilter, 0, imgInfo.bytesPerRow + 1);

-		} catch (IOException e) {

-			throw new PngjOutputException(e);

-		}

-	}

+	private void writeSignatureAndIHDR() {

+		currentChunkGroup = ChunksList.CHUNK_GROUP_0_IDHR;

 

-	/**

-	 * Same as writeRow(int[] newrow, int rown), but does not check row number

-	 * 

-	 * @param newrow

-	 */

-	public void writeRow(int[] newrow) {

-		writeRow(newrow, -1);

-	}

+		PngHelperInternal.writeBytes(os, PngHelperInternal.getPngIdSignature()); // signature

+		PngChunkIHDR ihdr = new PngChunkIHDR(imgInfo);

+		// http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html

+		ihdr.setCols(imgInfo.cols);

+		ihdr.setRows(imgInfo.rows);

+		ihdr.setBitspc(imgInfo.bitDepth);

+		int colormodel = 0;

+		if (imgInfo.alpha)

+			colormodel += 0x04;

+		if (imgInfo.indexed)

+			colormodel += 0x01;

+		if (!imgInfo.greyscale)

+			colormodel += 0x02;

+		ihdr.setColormodel(colormodel);

+		ihdr.setCompmeth(0); // compression method 0=deflate

+		ihdr.setFilmeth(0); // filter method (0)

+		ihdr.setInterlaced(0); // we never interlace

+		ihdr.createRawChunk().writeChunk(os);

 

-	/**

-	 * Writes line. See writeRow(int[] newrow, int rown)

-	 */

-	public void writeRow(ImageLine imgline, int rownumber) {

-		writeRow(imgline.scanline, rownumber);

 	}

 

-	/**

-	 * Writes line, checks that the row number is consistent with that of the ImageLine See writeRow(int[] newrow, int

-	 * rown)

-	 * 

-	 * @deprecated Better use writeRow(ImageLine imgline, int rownumber)

-	 */

-	public void writeRow(ImageLine imgline) {

-		writeRow(imgline.scanline, imgline.getRown());

-	}

+	protected void encodeRowFromByte(byte[] row) {

+		if (row.length == imgInfo.samplesPerRowPacked) {

+			// some duplication of code - because this case is typical and it works faster this way

+			int j = 1;

+			if (imgInfo.bitDepth <= 8) {

+				for (byte x : row) { // optimized

+					rowb[j++] = x;

+				}

+			} else { // 16 bitspc

+				for (byte x : row) { // optimized

+					rowb[j] = x;

+					j += 2;

+				}

+			}

+		} else {

+			// perhaps we need to pack?

+			if (row.length >= imgInfo.samplesPerRow && unpackedMode)

+				ImageLine.packInplaceByte(imgInfo, row, row, false); // row is packed in place!

+			if (imgInfo.bitDepth <= 8) {

+				for (int i = 0, j = 1; i < imgInfo.samplesPerRowPacked; i++) {

+					rowb[j++] = row[i];

+				}

+			} else { // 16 bitspc

+				for (int i = 0, j = 1; i < imgInfo.samplesPerRowPacked; i++) {

+					rowb[j++] = row[i];

+					rowb[j++] = 0;

+				}

+			}

 

-	/**

-	 * Finalizes the image creation and closes the stream. This MUST be called after writing the lines.

-	 */

-	public void end() {

-		if (rowNum != imgInfo.rows - 1)

-			throw new PngjOutputException("all rows have not been written");

-		try {

-			datStreamDeflated.finish();

-			datStream.flush();

-			writeLastChunks();

-			writeEndChunk();

-			os.close();

-		} catch (IOException e) {

-			throw new PngjOutputException(e);

 		}

 	}

 

-	private int[] histox = new int[256]; // auxiliar buffer, only used by reportResultsForFilter

-

-	private void reportResultsForFilter(int rown, FilterType type, boolean tentative) {

-		Arrays.fill(histox, 0);

-		int s = 0, v;

-		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

-			v = rowbfilter[i];

-			if (v < 0)

-				s -= (int) v;

-			else

-				s += (int) v;

-			histox[v & 0xFF]++;

+	protected void encodeRowFromInt(int[] row) {

+		// http://www.libpng.org/pub/png/spec/1.2/PNG-DataRep.html

+		if (row.length == imgInfo.samplesPerRowPacked) {

+			// some duplication of code - because this case is typical and it works faster this way

+			int j = 1;

+			if (imgInfo.bitDepth <= 8) {

+				for (int x : row) { // optimized

+					rowb[j++] = (byte) x;

+				}

+			} else { // 16 bitspc

+				for (int x : row) { // optimized

+					rowb[j++] = (byte) (x >> 8);

+					rowb[j++] = (byte) (x);

+				}

+			}

+		} else {

+			// perhaps we need to pack?

+			if (row.length >= imgInfo.samplesPerRow && unpackedMode)

+				ImageLine.packInplaceInt(imgInfo, row, row, false); // row is packed in place!

+			if (imgInfo.bitDepth <= 8) {

+				for (int i = 0, j = 1; i < imgInfo.samplesPerRowPacked; i++) {

+					rowb[j++] = (byte) (row[i]);

+				}

+			} else { // 16 bitspc

+				for (int i = 0, j = 1; i < imgInfo.samplesPerRowPacked; i++) {

+					rowb[j++] = (byte) (row[i] >> 8);

+					rowb[j++] = (byte) (row[i]);

+				}

+			}

 		}

-		filterStrat.fillResultsForFilter(rown, type, s, histox, tentative);

 	}

 

 	private void filterRow(int rown) {

@@ -268,123 +287,98 @@ public class PngWriter {
 			filterRowPaeth();

 			break;

 		default:

-			throw new PngjOutputException("Filter type " + filterType + " not implemented");

+			throw new PngjUnsupportedException("Filter type " + filterType + " not implemented");

 		}

 		reportResultsForFilter(rown, filterType, false);

 	}

 

-	protected int sumRowbfilter() { // sums absolute value

-		int s = 0;

-		for (int i = 1; i <= imgInfo.bytesPerRow; i++)

-			if (rowbfilter[i] < 0)

-				s -= (int) rowbfilter[i];

-			else

-				s += (int) rowbfilter[i];

-		return s;

+	private void prepareEncodeRow(int rown) {

+		if (datStream == null)

+			init();

+		rowNum++;

+		if (rown >= 0 && rowNum != rown)

+			throw new PngjOutputException("rows must be written in order: expected:" + rowNum + " passed:" + rown);

+		// swap

+		byte[] tmp = rowb;

+		rowb = rowbprev;

+		rowbprev = tmp;

 	}

 

-	protected void filterRowNone() {

-		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

-			rowbfilter[i] = (byte) rowb[i];

+	private void filterAndSend(int rown) {

+		filterRow(rown);

+		try {

+			datStreamDeflated.write(rowbfilter, 0, imgInfo.bytesPerRow + 1);

+		} catch (IOException e) {

+			throw new PngjOutputException(e);

 		}

 	}

 

-	protected void filterRowSub() {

-		int i, j;

-		for (i = 1; i <= imgInfo.bytesPixel; i++)

-			rowbfilter[i] = (byte) rowb[i];

-		for (j = 1, i = imgInfo.bytesPixel + 1; i <= imgInfo.bytesPerRow; i++, j++) {

-			rowbfilter[i] = (byte) (rowb[i] - rowb[j]);

+	protected void filterRowAverage() {

+		int i, j, imax;

+		imax = imgInfo.bytesPerRow;

+		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= imax; i++, j++) {

+			rowbfilter[i] = (byte) (rowb[i] - ((rowbprev[i] & 0xFF) + (j > 0 ? (rowb[j] & 0xFF) : 0)) / 2);

 		}

 	}

 

-	protected void filterRowUp() {

+	protected void filterRowNone() {

 		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

-			rowbfilter[i] = (byte) (rowb[i] - rowbprev[i]);

-		}

-	}

-

-	protected void filterRowAverage() {

-		int i, j;

-		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= imgInfo.bytesPerRow; i++, j++) {

-			rowbfilter[i] = (byte) (rowb[i] - ((rowbprev[i] & 0xFF) + (j > 0 ? (rowb[j] & 0xFF) : 0)) / 2);

+			rowbfilter[i] = (byte) rowb[i];

 		}

 	}

 

 	protected void filterRowPaeth() {

-		int i, j;

-		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= imgInfo.bytesPerRow; i++, j++) {

-			rowbfilter[i] = (byte) (rowb[i] - FilterType.filterPaethPredictor(j > 0 ? (rowb[j] & 0xFF) : 0,

-					rowbprev[i] & 0xFF, j > 0 ? (rowbprev[j] & 0xFF) : 0));

+		int i, j, imax;

+		imax = imgInfo.bytesPerRow;

+		for (j = 1 - imgInfo.bytesPixel, i = 1; i <= imax; i++, j++) {

+			// rowbfilter[i] = (byte) (rowb[i] - PngHelperInternal.filterPaethPredictor(j > 0 ? (rowb[j] & 0xFF) : 0,

+			// rowbprev[i] & 0xFF, j > 0 ? (rowbprev[j] & 0xFF) : 0));

+			rowbfilter[i] = (byte) PngHelperInternal.filterRowPaeth(rowb[i], j > 0 ? (rowb[j] & 0xFF) : 0,

+					rowbprev[i] & 0xFF, j > 0 ? (rowbprev[j] & 0xFF) : 0);

 		}

 	}

 

-	protected void convertRowToBytes() {

-		// http://www.libpng.org/pub/png/spec/1.2/PNG-DataRep.html

+	protected void filterRowSub() {

 		int i, j;

-		if (imgInfo.bitDepth <= 8) {

-			for (i = 0, j = 1; i < imgInfo.samplesPerRowP; i++) {

-				rowb[j++] = (byte) (scanline[i]);

-			}

-		} else { // 16 bitspc

-			for (i = 0, j = 1; i < imgInfo.samplesPerRowP; i++) {

-				// x = (int) (scanline[i]) & 0xFFFF;

-				rowb[j++] = (byte) (scanline[i] >> 8);

-				rowb[j++] = (byte) (scanline[i]);

-			}

+		for (i = 1; i <= imgInfo.bytesPixel; i++)

+			rowbfilter[i] = (byte) rowb[i];

+		for (j = 1, i = imgInfo.bytesPixel + 1; i <= imgInfo.bytesPerRow; i++, j++) {

+			// !!! rowbfilter[i] = (byte) (rowb[i] - rowb[j]);

+			rowbfilter[i] = (byte) PngHelperInternal.filterRowSub(rowb[i], rowb[j]);

 		}

 	}

 

-	// /// several getters / setters - all this setters are optional

-

-	/**

-	 * Filename or description, from the optional constructor argument.

-	 */

-	public String getFilename() {

-		return filename;

+	protected void filterRowUp() {

+		for (int i = 1; i <= imgInfo.bytesPerRow; i++) {

+			// rowbfilter[i] = (byte) (rowb[i] - rowbprev[i]); !!!

+			rowbfilter[i] = (byte) PngHelperInternal.filterRowUp(rowb[i], rowbprev[i]);

+		}

 	}

 

-	/**

-	 * Sets internal prediction filter type, or strategy to choose it.

-	 * <p>

-	 * This must be called just after constructor, before starting writing.

-	 * <p>

-	 * See also setCompLevel()

-	 * 

-	 * @param filterType

-	 *            One of the five prediction types or strategy to choose it (see <code>PngFilterType</code>) Recommended

-	 *            values: DEFAULT (default) or AGGRESIVE

-	 */

-	public void setFilterType(FilterType filterType) {

-		filterStrat = new FilterWriteStrategy(imgInfo, filterType);

+	protected int sumRowbfilter() { // sums absolute value

+		int s = 0;

+		for (int i = 1; i <= imgInfo.bytesPerRow; i++)

+			if (rowbfilter[i] < 0)

+				s -= (int) rowbfilter[i];

+			else

+				s += (int) rowbfilter[i];

+		return s;

 	}

 

 	/**

-	 * Sets compression level of ZIP algorithm.

+	 * copy chunks from reader - copy_mask : see ChunksToWrite.COPY_XXX

 	 * <p>

-	 * This must be called just after constructor, before starting writing.

+	 * If we are after idat, only considers those chunks after IDAT in PngReader

 	 * <p>

-	 * See also setFilterType()

-	 * 

-	 * @param compLevel

-	 *            between 0 and 9 (default:6 , recommended: 6 or more)

-	 */

-	public void setCompLevel(int compLevel) {

-		if (compLevel < 0 || compLevel > 9)

-			throw new PngjException("Compression level invalid (" + compLevel + ") Must be 0..9");

-		this.compLevel = compLevel;

-	}

-

-	/**

-	 * copy chunks from reader - copy_mask : see ChunksToWrite.COPY_XXX

-	 * 

-	 * If we are after idat, only considers those chunks after IDAT in PngReader TODO: this should be more customizable

+	 * TODO: this should be more customizable

 	 */

 	private void copyChunks(PngReader reader, int copy_mask, boolean onlyAfterIdat) {

-		boolean idatDone = currentChunkGroup >= ChunkList.CHUNK_GROUP_4_IDAT;

+		boolean idatDone = currentChunkGroup >= ChunksList.CHUNK_GROUP_4_IDAT;

+		if (onlyAfterIdat && reader.getCurrentChunkGroup() < ChunksList.CHUNK_GROUP_6_END)

+			throw new PngjExceptionInternal("tried to copy last chunks but reader has not ended");

 		for (PngChunk chunk : reader.getChunksList().getChunks()) {

 			int group = chunk.getChunkGroup();

-			if (group < ChunkList.CHUNK_GROUP_4_IDAT && idatDone)

+			if (group < ChunksList.CHUNK_GROUP_4_IDAT && idatDone)

 				continue;

 			boolean copy = false;

 			if (chunk.crit) {

@@ -413,9 +407,11 @@ public class PngWriter {
 						&& !(ChunkHelper.isUnknown(chunk) || text || chunk.id.equals(ChunkHelper.hIST) || chunk.id

 								.equals(ChunkHelper.tIME)))

 					copy = true;

+				if (chunk instanceof PngChunkSkipped)

+					copy = false;

 			}

 			if (copy) {

-				chunkList.queueChunk(PngChunk.cloneChunk(chunk, imgInfo), !chunk.allowsMultiple(), false);

+				chunksList.queue(PngChunk.cloneChunk(chunk, imgInfo));

 			}

 		}

 	}

@@ -423,13 +419,15 @@ public class PngWriter {
 	/**

 	 * Copies first (pre IDAT) ancillary chunks from a PngReader.

 	 * <p>

-	 * Should be called when creating an image from another, before starting writing lines, to copy relevant chunks.

+	 * Should be called when creating an image from another, before starting

+	 * writing lines, to copy relevant chunks.

 	 * <p>

-	 * 

+	 *

 	 * @param reader

 	 *            : PngReader object, already opened.

 	 * @param copy_mask

-	 *            : Mask bit (OR), see <code>ChunksToWrite.COPY_XXX</code> constants

+	 *            : Mask bit (OR), see <code>ChunksToWrite.COPY_XXX</code>

+	 *            constants

 	 */

 	public void copyChunksFirst(PngReader reader, int copy_mask) {

 		copyChunks(reader, copy_mask, false);

@@ -438,25 +436,254 @@ public class PngWriter {
 	/**

 	 * Copies last (post IDAT) ancillary chunks from a PngReader.

 	 * <p>

-	 * Should be called when creating an image from another, after writing all lines, before closing the writer, to copy

-	 * additional chunks.

+	 * Should be called when creating an image from another, after writing all

+	 * lines, before closing the writer, to copy additional chunks.

 	 * <p>

-	 * 

+	 *

 	 * @param reader

 	 *            : PngReader object, already opened and fully read.

 	 * @param copy_mask

-	 *            : Mask bit (OR), see <code>ChunksToWrite.COPY_XXX</code> constants

+	 *            : Mask bit (OR), see <code>ChunksToWrite.COPY_XXX</code>

+	 *            constants

 	 */

 	public void copyChunksLast(PngReader reader, int copy_mask) {

 		copyChunks(reader, copy_mask, true);

 	}

 

-	public ChunkList getChunkList() {

-		return chunkList;

+	/**

+	 * Computes compressed size/raw size, approximate.

+	 * <p>

+	 * Actually: compressed size = total size of IDAT data , raw size =

+	 * uncompressed pixel bytes = rows * (bytesPerRow + 1).

+	 *

+	 * This must be called after pngw.end()

+	 */

+	public double computeCompressionRatio() {

+		if (currentChunkGroup < ChunksList.CHUNK_GROUP_6_END)

+			throw new PngjOutputException("must be called after end()");

+		double compressed = (double) datStream.getCountFlushed();

+		double raw = (imgInfo.bytesPerRow + 1) * imgInfo.rows;

+		return compressed / raw;

 	}

 

+	/**

+	 * Finalizes the image creation and closes the stream. This MUST be called

+	 * after writing the lines.

+	 */

+	public void end() {

+		if (rowNum != imgInfo.rows - 1)

+			throw new PngjOutputException("all rows have not been written");

+		try {

+			datStreamDeflated.finish();

+			datStream.flush();

+			writeLastChunks();

+			writeEndChunk();

+			if (shouldCloseStream)

+				os.close();

+		} catch (IOException e) {

+			throw new PngjOutputException(e);

+		}

+	}

+

+	/**

+	 * returns the chunks list (queued and writen chunks)

+	 */

+	public ChunksListForWrite getChunksList() {

+		return chunksList;

+	}

+

+	/**

+	 * Filename or description, from the optional constructor argument.

+	 */

+	public String getFilename() {

+		return filename;

+	}

+

+	/**

+	 * High level wrapper over chunksList for metadata handling

+	 */

 	public PngMetadata getMetadata() {

 		return metadata;

 	}

 

+	/**

+	 * Sets compression level of ZIP algorithm.

+	 * <p>

+	 * This must be called just after constructor, before starting writing.

+	 * <p>

+	 * See also setFilterType()

+	 *

+	 * @param compLevel

+	 *            between 0 and 9 (default:6 , recommended: 6 or more)

+	 */

+	public void setCompLevel(int compLevel) {

+		if (compLevel < 0 || compLevel > 9)

+			throw new PngjOutputException("Compression level invalid (" + compLevel + ") Must be 0..9");

+		this.compLevel = compLevel;

+	}

+

+	/**

+	 * Sets internal prediction filter type, or strategy to choose it.

+	 * <p>

+	 * This must be called just after constructor, before starting writing.

+	 * <p>

+	 * See also setCompLevel()

+	 *

+	 * @param filterType

+	 *            One of the five prediction types or strategy to choose it (see

+	 *            <code>PngFilterType</code>) Recommended values: DEFAULT

+	 *            (default) or AGGRESIVE

+	 */

+	public void setFilterType(FilterType filterType) {

+		filterStrat = new FilterWriteStrategy(imgInfo, filterType);

+	}

+

+	/**

+	 * Sets maximum size of IDAT fragments. This has little effect on

+	 * performance you should rarely call this

+	 * <p>

+	 *

+	 * @param idatMaxSize

+	 *            default=0 : use defaultSize (32K)

+	 */

+	public void setIdatMaxSize(int idatMaxSize) {

+		this.idatMaxSize = idatMaxSize;

+	}

+

+	/**

+	 * if true, input stream will be closed after ending write

+	 * <p>

+	 * default=true

+	 */

+	public void setShouldCloseStream(boolean shouldCloseStream) {

+		this.shouldCloseStream = shouldCloseStream;

+	}

+

+	/**

+	 * Deflater strategy: one of Deflater.FILTERED Deflater.HUFFMAN_ONLY

+	 * Deflater.DEFAULT_STRATEGY

+	 * <p>

+	 * Default: Deflater.FILTERED . This should be changed very rarely.

+	 */

+	public void setDeflaterStrategy(int deflaterStrategy) {

+		this.deflaterStrategy = deflaterStrategy;

+	}

+

+	/**

+	 * Writes line, checks that the row number is consistent with that of the

+	 * ImageLine See writeRow(int[] newrow, int rown)

+	 *

+	 * @deprecated Better use writeRow(ImageLine imgline, int rownumber)

+	 */

+	public void writeRow(ImageLine imgline) {

+		writeRow(imgline.scanline, imgline.getRown());

+	}

+

+	/**

+	 * Writes line. See writeRow(int[] newrow, int rown)

+	 *

+	 * The <tt>packed</tt> flag of the imageline is honoured!

+	 *

+	 * @see #writeRowInt(int[], int)

+	 */

+	public void writeRow(ImageLine imgline, int rownumber) {

+		unpackedMode = imgline.samplesUnpacked;

+		if (imgline.sampleType == SampleType.INT)

+			writeRowInt(imgline.scanline, rownumber);

+		else

+			writeRowByte(imgline.scanlineb, rownumber);

+	}

+

+	/**

+	 * Same as writeRow(int[] newrow, int rown), but does not check row number

+	 *

+	 * @param newrow

+	 */

+	public void writeRow(int[] newrow) {

+		writeRow(newrow, -1);

+	}

+

+	/**

+	 * Alias to writeRowInt

+	 *

+	 * @see #writeRowInt(int[], int)

+	 */

+	public void writeRow(int[] newrow, int rown) {

+		writeRowInt(newrow, rown);

+	}

+

+	/**

+	 * Writes a full image row.

+	 * <p>

+	 * This must be called sequentially from n=0 to n=rows-1 One integer per

+	 * sample , in the natural order: R G B R G B ... (or R G B A R G B A... if

+	 * has alpha) The values should be between 0 and 255 for 8 bitspc images,

+	 * and between 0- 65535 form 16 bitspc images (this applies also to the

+	 * alpha channel if present) The array can be reused.

+	 * <p>

+	 * Warning: the array might be modified in some cases (unpacked row with low

+	 * bitdepth)

+	 * <p>

+	 *

+	 * @param newrow

+	 *            Array of pixel values. Warning: the array size should be exact

+	 *            (samplesPerRowP)

+	 * @param rown

+	 *            Row number, from 0 (top) to rows-1 (bottom). This is just used

+	 *            as a check. Pass -1 if you want to autocompute it

+	 */

+	public void writeRowInt(int[] newrow, int rown) {

+		prepareEncodeRow(rown);

+		encodeRowFromInt(newrow);

+		filterAndSend(rown);

+	}

+

+	/**

+	 * Same semantics as writeRowInt but using bytes. Each byte is still a

+	 * sample. If 16bitdepth, we are passing only the most significant byte (and

+	 * hence losing some info)

+	 *

+	 * @see PngWriter#writeRowInt(int[], int)

+	 */

+	public void writeRowByte(byte[] newrow, int rown) {

+		prepareEncodeRow(rown);

+		encodeRowFromByte(newrow);

+		filterAndSend(rown);

+	}

+

+	/**

+	 * Writes all the pixels, calling writeRowInt() for each image row

+	 */

+	public void writeRowsInt(int[][] image) {

+		for (int i = 0; i < imgInfo.rows; i++)

+			writeRowInt(image[i], i);

+	}

+

+	/**

+	 * Writes all the pixels, calling writeRowByte() for each image row

+	 */

+	public void writeRowsByte(byte[][] image) {

+		for (int i = 0; i < imgInfo.rows; i++)

+			writeRowByte(image[i], i);

+	}

+

+	public boolean isUnpackedMode() {

+		return unpackedMode;

+	}

+

+	/**

+	 * If false (default), and image has bitdepth 1-2-4, the scanlines passed

+	 * are assumed to be already packed.

+	 * <p>

+	 * If true, each element is a sample, the writer will perform the packing if

+	 * necessary.

+	 * <p>

+	 * Warning: when using {@link #writeRow(ImageLine, int)} (recommended) the

+	 * <tt>packed</tt> flag of the ImageLine object overrides (and overwrites!)

+	 * this field.

+	 */

+	public void setUseUnPackedMode(boolean useUnpackedMode) {

+		this.unpackedMode = useUnpackedMode;

+	}

+

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngjException.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngjException.java
index 4a45cb5bf..97e24fc73 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngjException.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngjException.java
@@ -2,9 +2,9 @@ package jogamp.opengl.util.pngj;
 

 /**

  * Generic exception

- * 

+ *

  * @author Hernan J Gonzalez

- * 

+ *

  */

 public class PngjException extends RuntimeException {

 	private static final long serialVersionUID = 1L;

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngjExceptionInternal.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngjExceptionInternal.java
new file mode 100644
index 000000000..5da70de7b
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngjExceptionInternal.java
@@ -0,0 +1,24 @@
+package jogamp.opengl.util.pngj;

+

+/**

+ * Exception for anomalous internal problems (sort of asserts) that point to

+ * some issue with the library

+ *

+ * @author Hernan J Gonzalez

+ *

+ */

+public class PngjExceptionInternal extends RuntimeException {

+	private static final long serialVersionUID = 1L;

+

+	public PngjExceptionInternal(String message, Throwable cause) {

+		super(message, cause);

+	}

+

+	public PngjExceptionInternal(String message) {

+		super(message);

+	}

+

+	public PngjExceptionInternal(Throwable cause) {

+		super(cause);

+	}

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngjUnsupportedException.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngjUnsupportedException.java
index 0801e33bb..f68458d19 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngjUnsupportedException.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngjUnsupportedException.java
@@ -1,7 +1,8 @@
 package jogamp.opengl.util.pngj;

 

 /**

- * Exception thrown because of some valid feature of PNG standard that this library does not support

+ * Exception thrown because of some valid feature of PNG standard that this

+ * library does not support

  */

 public class PngjUnsupportedException extends RuntimeException {

 	private static final long serialVersionUID = 1L;

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ProgressiveOutputStream.java b/src/jogl/classes/jogamp/opengl/util/pngj/ProgressiveOutputStream.java
index bbec247fb..4516a0886 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ProgressiveOutputStream.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ProgressiveOutputStream.java
@@ -4,10 +4,12 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;

 

 /**

- * stream that outputs to memory and allows to flush fragments every 'size' bytes to some other destination

+ * stream that outputs to memory and allows to flush fragments every 'size'

+ * bytes to some other destination

  */

 abstract class ProgressiveOutputStream extends ByteArrayOutputStream {

 	private final int size;

+	private long countFlushed = 0;

 

 	public ProgressiveOutputStream(int size) {

 		this.size = size;

@@ -49,8 +51,8 @@ abstract class ProgressiveOutputStream extends ByteArrayOutputStream {
 	}

 

 	/**

-	 * if it's time to flush data (or if forced==true) calls abstract method flushBuffer() and cleans those bytes from

-	 * own buffer

+	 * if it's time to flush data (or if forced==true) calls abstract method

+	 * flushBuffer() and cleans those bytes from own buffer

 	 */

 	private final void checkFlushBuffer(boolean forced) {

 		while (forced || count >= size) {

@@ -60,6 +62,7 @@ abstract class ProgressiveOutputStream extends ByteArrayOutputStream {
 			if (nb == 0)

 				return;

 			flushBuffer(buf, nb);

+			countFlushed += nb;

 			int bytesleft = count - nb;

 			count = bytesleft;

 			if (bytesleft > 0)

@@ -67,5 +70,9 @@ abstract class ProgressiveOutputStream extends ByteArrayOutputStream {
 		}

 	}

 

-	public abstract void flushBuffer(byte[] b, int n);

+	protected abstract void flushBuffer(byte[] b, int n);

+

+	public long getCountFlushed() {

+		return countFlushed;

+	}

 }
\ No newline at end of file
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkCopyBehaviour.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkCopyBehaviour.java
index 43c0cb135..a2d976fac 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkCopyBehaviour.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkCopyBehaviour.java
@@ -1,8 +1,9 @@
 package jogamp.opengl.util.pngj.chunks;

 

 /**

- * Chunk copy policy to apply when copyng from a pngReader to a pngWriter http://www.w3.org/TR/PNG/#14

+ * Chunk copy policy to apply when copyng from a pngReader to a pngWriter.

  * <p>

+ * http://www.w3.org/TR/PNG/#14 <br>

  * These are masks, can be OR-ed

  **/

 public class ChunkCopyBehaviour {

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkHelper.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkHelper.java
index 26dafd4eb..4e8bf5635 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkHelper.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkHelper.java
@@ -1,134 +1,299 @@
-package jogamp.opengl.util.pngj.chunks;

-

-// see http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html

-// http://www.w3.org/TR/PNG/#5Chunk-naming-conventions

-// http://www.w3.org/TR/PNG/#table53

-import java.io.ByteArrayInputStream;

-import java.io.ByteArrayOutputStream;

-import java.io.IOException;

-import java.io.InputStream;

-import java.io.OutputStream;

-import java.util.Set;

-import java.util.zip.DeflaterOutputStream;

-import java.util.zip.InflaterInputStream;

-

-import jogamp.opengl.util.pngj.PngHelper;

-import jogamp.opengl.util.pngj.PngjException;

-

-

-public class ChunkHelper {

-	public static final String IHDR = "IHDR";

-	public static final String PLTE = "PLTE";

-	public static final String IDAT = "IDAT";

-	public static final String IEND = "IEND";

-	public static final byte[] b_IHDR = toBytes(IHDR);

-	public static final byte[] b_PLTE = toBytes(PLTE);

-	public static final byte[] b_IDAT = toBytes(IDAT);

-	public static final byte[] b_IEND = toBytes(IEND);

-

-	public static final String cHRM = "cHRM";

-	public static final String gAMA = "gAMA";

-	public static final String iCCP = "iCCP";

-	public static final String sBIT = "sBIT";

-	public static final String sRGB = "sRGB";

-	public static final String bKGD = "bKGD";

-	public static final String hIST = "hIST";

-	public static final String tRNS = "tRNS";

-	public static final String pHYs = "pHYs";

-	public static final String sPLT = "sPLT";

-	public static final String tIME = "tIME";

-	public static final String iTXt = "iTXt";

-	public static final String tEXt = "tEXt";

-	public static final String zTXt = "zTXt";

-

-	public static Set<String> KNOWN_CHUNKS_CRITICAL = PngHelper.asSet(IHDR, PLTE, IDAT, IEND);

-

-	public static byte[] toBytes(String x) {

-		return x.getBytes(PngHelper.charsetLatin1);

-	}

-

-	public static String toString(byte[] x) {

-		return new String(x, PngHelper.charsetLatin1);

-	}

-

-	public static boolean isCritical(String id) { // critical chunk ?

-		// first letter is uppercase

-		return (Character.isUpperCase(id.charAt(0)));

-	}

-

-	public static boolean isPublic(String id) { // public chunk?

-		// second letter is uppercase

-		return (Character.isUpperCase(id.charAt(1)));

-	}

-

-	/**

-	 * "Unknown" just means that our chunk factory (even when it has been augmented by client code) did not recognize its id

-	 */

-	public static boolean isUnknown(PngChunk c) {

-		return c instanceof PngChunkUNKNOWN;

-	}

-

-	public static boolean isSafeToCopy(String id) { // safe to copy?

-		// fourth letter is lower case

-		return (!Character.isUpperCase(id.charAt(3)));

-	}

-

-	public static int posNullByte(byte[] b) {

-		for (int i = 0; i < b.length; i++)

-			if (b[i] == 0)

-				return i;

-		return -1;

-	}

-

-	public static boolean shouldLoad(String id, ChunkLoadBehaviour behav) {

-		if (isCritical(id))

-			return true;

-		boolean kwown = PngChunk.isKnown(id);

-		switch (behav) {

-		case LOAD_CHUNK_ALWAYS:

-			return true;

-		case LOAD_CHUNK_IF_SAFE:

-			return kwown || isSafeToCopy(id);

-		case LOAD_CHUNK_KNOWN:

-			return kwown;

-		case LOAD_CHUNK_NEVER:

-			return false;

-		}

-		return false; // should not reach here

-	}

-

-	public final static byte[] compressBytes(byte[] ori, boolean compress) {

-		return compressBytes(ori, 0, ori.length, compress);

-	}

-

-	public static byte[] compressBytes(byte[] ori, int offset, int len, boolean compress) {

-		try {

-			ByteArrayInputStream inb = new ByteArrayInputStream(ori, offset, len);

-			InputStream in = compress ? inb : new InflaterInputStream(inb);

-			ByteArrayOutputStream outb = new ByteArrayOutputStream();

-			OutputStream out = compress ? new DeflaterOutputStream(outb) : outb;

-			shovelInToOut(in, out);

-			in.close();

-			out.close();

-			return outb.toByteArray();

-		} catch (Exception e) {

-			throw new PngjException(e);

-		}

-	}

-

-	/**

-	 * Shovels all data from an input stream to an output stream.

-	 */

-	private static void shovelInToOut(InputStream in, OutputStream out) throws IOException {

-		byte[] buffer = new byte[1024];

-		int len;

-		while ((len = in.read(buffer)) > 0) {

-			out.write(buffer, 0, len);

-		}

-	}

-

-	public static boolean maskMatch(int v, int mask) {

-		return (v & mask) != 0;

-	}

-

-}

+package jogamp.opengl.util.pngj.chunks;
+
+
+// see http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html
+// http://www.w3.org/TR/PNG/#5Chunk-naming-conventions
+// http://www.w3.org/TR/PNG/#table53
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.zip.Deflater;
+import java.util.zip.DeflaterOutputStream;
+import java.util.zip.Inflater;
+import java.util.zip.InflaterInputStream;
+
+import jogamp.opengl.util.pngj.PngHelperInternal;
+import jogamp.opengl.util.pngj.PngjException;
+
+
+public class ChunkHelper {
+	public static final String IHDR = "IHDR";
+	public static final String PLTE = "PLTE";
+	public static final String IDAT = "IDAT";
+	public static final String IEND = "IEND";
+	public static final byte[] b_IHDR = toBytes(IHDR);
+	public static final byte[] b_PLTE = toBytes(PLTE);
+	public static final byte[] b_IDAT = toBytes(IDAT);
+	public static final byte[] b_IEND = toBytes(IEND);
+
+	public static final String cHRM = "cHRM";
+	public static final String gAMA = "gAMA";
+	public static final String iCCP = "iCCP";
+	public static final String sBIT = "sBIT";
+	public static final String sRGB = "sRGB";
+	public static final String bKGD = "bKGD";
+	public static final String hIST = "hIST";
+	public static final String tRNS = "tRNS";
+	public static final String pHYs = "pHYs";
+	public static final String sPLT = "sPLT";
+	public static final String tIME = "tIME";
+	public static final String iTXt = "iTXt";
+	public static final String tEXt = "tEXt";
+	public static final String zTXt = "zTXt";
+
+	private static final ThreadLocal<Inflater> inflaterProvider = new ThreadLocal<Inflater>() {
+		@Override
+		protected Inflater initialValue() {
+			return new Inflater();
+		}
+	};
+
+	private static final ThreadLocal<Deflater> deflaterProvider = new ThreadLocal<Deflater>() {
+		@Override
+		protected Deflater initialValue() {
+			return new Deflater();
+		}
+	};
+
+	/*
+	 * static auxiliary buffer. any method that uses this should synchronize against this
+	 */
+	private static byte[] tmpbuffer = new byte[4096];
+
+	/**
+	 * Converts to bytes using Latin1 (ISO-8859-1)
+	 */
+	public static byte[] toBytes(String x) {
+		return x.getBytes(PngHelperInternal.charsetLatin1);
+	}
+
+	/**
+	 * Converts to String using Latin1 (ISO-8859-1)
+	 */
+	public static String toString(byte[] x) {
+		return new String(x, PngHelperInternal.charsetLatin1);
+	}
+
+	/**
+	 * Converts to String using Latin1 (ISO-8859-1)
+	 */
+	public static String toString(byte[] x, int offset, int len) {
+		return new String(x, offset, len, PngHelperInternal.charsetLatin1);
+	}
+
+	/**
+	 * Converts to bytes using UTF-8
+	 */
+	public static byte[] toBytesUTF8(String x) {
+		return x.getBytes(PngHelperInternal.charsetUTF8);
+	}
+
+	/**
+	 * Converts to string using UTF-8
+	 */
+	public static String toStringUTF8(byte[] x) {
+		return new String(x, PngHelperInternal.charsetUTF8);
+	}
+
+	/**
+	 * Converts to string using UTF-8
+	 */
+	public static String toStringUTF8(byte[] x, int offset, int len) {
+		return new String(x, offset, len, PngHelperInternal.charsetUTF8);
+	}
+
+	/**
+	 * critical chunk : first letter is uppercase
+	 */
+	public static boolean isCritical(String id) {
+		return (Character.isUpperCase(id.charAt(0)));
+	}
+
+	/**
+	 * public chunk: second letter is uppercase
+	 */
+	public static boolean isPublic(String id) { //
+		return (Character.isUpperCase(id.charAt(1)));
+	}
+
+	/**
+	 * Safe to copy chunk: fourth letter is lower case
+	 */
+	public static boolean isSafeToCopy(String id) {
+		return (!Character.isUpperCase(id.charAt(3)));
+	}
+
+	/**
+	 * "Unknown" just means that our chunk factory (even when it has been
+	 * augmented by client code) did not recognize its id
+	 */
+	public static boolean isUnknown(PngChunk c) {
+		return c instanceof PngChunkUNKNOWN;
+	}
+
+	/**
+	 * Finds position of null byte in array
+	 *
+	 * @param b
+	 * @return -1 if not found
+	 */
+	public static int posNullByte(byte[] b) {
+		for (int i = 0; i < b.length; i++)
+			if (b[i] == 0)
+				return i;
+		return -1;
+	}
+
+	/**
+	 * Decides if a chunk should be loaded, according to a ChunkLoadBehaviour
+	 *
+	 * @param id
+	 * @param behav
+	 * @return true/false
+	 */
+	public static boolean shouldLoad(String id, ChunkLoadBehaviour behav) {
+		if (isCritical(id))
+			return true;
+		boolean kwown = PngChunk.isKnown(id);
+		switch (behav) {
+		case LOAD_CHUNK_ALWAYS:
+			return true;
+		case LOAD_CHUNK_IF_SAFE:
+			return kwown || isSafeToCopy(id);
+		case LOAD_CHUNK_KNOWN:
+			return kwown;
+		case LOAD_CHUNK_NEVER:
+			return false;
+		}
+		return false; // should not reach here
+	}
+
+	public final static byte[] compressBytes(byte[] ori, boolean compress) {
+		return compressBytes(ori, 0, ori.length, compress);
+	}
+
+	public static byte[] compressBytes(byte[] ori, int offset, int len, boolean compress) {
+		try {
+			ByteArrayInputStream inb = new ByteArrayInputStream(ori, offset, len);
+			InputStream in = compress ? inb : new InflaterInputStream(inb, getInflater());
+			ByteArrayOutputStream outb = new ByteArrayOutputStream();
+			OutputStream out = compress ? new DeflaterOutputStream(outb) : outb;
+			shovelInToOut(in, out);
+			in.close();
+			out.close();
+			return outb.toByteArray();
+		} catch (Exception e) {
+			throw new PngjException(e);
+		}
+	}
+
+	/**
+	 * Shovels all data from an input stream to an output stream.
+	 */
+	private static void shovelInToOut(InputStream in, OutputStream out) throws IOException {
+		synchronized (tmpbuffer) {
+			int len;
+			while ((len = in.read(tmpbuffer)) > 0) {
+				out.write(tmpbuffer, 0, len);
+			}
+		}
+	}
+
+	public static boolean maskMatch(int v, int mask) {
+		return (v & mask) != 0;
+	}
+
+	/**
+	 * Returns only the chunks that "match" the predicate
+	 *
+	 * See also trimList()
+	 */
+	public static List<PngChunk> filterList(List<PngChunk> target, ChunkPredicate predicateKeep) {
+		List<PngChunk> result = new ArrayList<PngChunk>();
+		for (PngChunk element : target) {
+			if (predicateKeep.match(element)) {
+				result.add(element);
+			}
+		}
+		return result;
+	}
+
+	/**
+	 * Remove (in place) the chunks that "match" the predicate
+	 *
+	 * See also filterList
+	 */
+	public static int trimList(List<PngChunk> target, ChunkPredicate predicateRemove) {
+		Iterator<PngChunk> it = target.iterator();
+		int cont = 0;
+		while (it.hasNext()) {
+			PngChunk c = it.next();
+			if (predicateRemove.match(c)) {
+				it.remove();
+				cont++;
+			}
+		}
+		return cont;
+	}
+
+	/**
+	 * MY adhoc criteria: two chunks are "equivalent" ("practically equal") if
+	 * they have same id and (perhaps, if multiple are allowed) if the match
+	 * also in some "internal key" (eg: key for string values, palette for sPLT,
+	 * etc)
+	 *
+	 * Notice that the use of this is optional, and that the PNG standard allows
+	 * Text chunks that have same key
+	 *
+	 * @return true if "equivalent"
+	 */
+	public static final boolean equivalent(PngChunk c1, PngChunk c2) {
+		if (c1 == c2)
+			return true;
+		if (c1 == null || c2 == null || !c1.id.equals(c2.id))
+			return false;
+		// same id
+		if (c1.getClass() != c2.getClass())
+			return false; // should not happen
+		if (!c2.allowsMultiple())
+			return true;
+		if (c1 instanceof PngChunkTextVar) {
+			return ((PngChunkTextVar) c1).getKey().equals(((PngChunkTextVar) c2).getKey());
+		}
+		if (c1 instanceof PngChunkSPLT) {
+			return ((PngChunkSPLT) c1).getPalName().equals(((PngChunkSPLT) c2).getPalName());
+		}
+		// unknown chunks that allow multiple? consider they don't match
+		return false;
+	}
+
+	public static boolean isText(PngChunk c) {
+		return c instanceof PngChunkTextVar;
+	}
+
+	/**
+	 * thread-local inflater, just reset : this should be only used for short
+	 * individual chunks compression
+	 */
+	public static Inflater getInflater() {
+		Inflater inflater = inflaterProvider.get();
+		inflater.reset();
+		return inflater;
+	}
+
+	/**
+	 * thread-local deflater, just reset : this should be only used for short
+	 * individual chunks decompression
+	 */
+	public static Deflater getDeflater() {
+		Deflater deflater = deflaterProvider.get();
+		deflater.reset();
+		return deflater;
+	}
+
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkList.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkList.java
deleted file mode 100644
index badbbd0e8..000000000
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkList.java
+++ /dev/null
@@ -1,282 +0,0 @@
-package jogamp.opengl.util.pngj.chunks;

-

-import java.io.OutputStream;

-import java.util.ArrayList;

-import java.util.Iterator;

-import java.util.LinkedHashSet;

-import java.util.List;

-import java.util.Set;

-

-import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngjException;

-

-

-/**

- * All chunks that form an image, read or to be written

- * 

- * chunks include all chunks, but IDAT is a single pseudo chunk without data

- **/

-public class ChunkList {

-	// ref: http://www.w3.org/TR/PNG/#table53

-	public static final int CHUNK_GROUP_0_IDHR = 0; // required - single

-	public static final int CHUNK_GROUP_1_AFTERIDHR = 1; // optional - multiple

-	public static final int CHUNK_GROUP_2_PLTE = 2; // optional - single

-	public static final int CHUNK_GROUP_3_AFTERPLTE = 3; // optional - multple

-	public static final int CHUNK_GROUP_4_IDAT = 4; // required (single pseudo chunk)

-	public static final int CHUNK_GROUP_5_AFTERIDAT = 5; // optional - multple

-	public static final int CHUNK_GROUP_6_END = 6; // only 1 chunk - requried

-

-	/**

-	 * All chunks, read, written (does not include IHDR, IDAT, END for written)

-	 */

-	private List<PngChunk> chunks = new ArrayList<PngChunk>();

-

-	/**

-	 * chunks not yet writen - does not include IHDR, IDAT, END, perhaps yes PLTE

-	 */

-	private Set<PngChunk> queuedChunks = new LinkedHashSet<PngChunk>();

-

-	final ImageInfo imageInfo; // only required for writing

-

-	public ChunkList(ImageInfo imfinfo) {

-		this.imageInfo = imfinfo;

-	}

-

-	/**

-	 * Adds chunk in next position. This is used when reading

-	 */

-	public void appendReadChunk(PngChunk chunk, int chunkGroup) {

-		chunk.setChunkGroup(chunkGroup);

-		chunks.add(chunk);

-	}

-

-	public List<PngChunk> getById(String id, boolean includeQueued, boolean includeProcessed) {

-		List<PngChunk> list = new ArrayList<PngChunk>();

-		if (includeQueued)

-			for (PngChunk c : queuedChunks)

-				if (c.id.equals(id))

-					list.add(c);

-		if (includeProcessed)

-			for (PngChunk c : chunks)

-				if (c.id.equals(id))

-					list.add(c);

-		return list;

-	}

-

-	/**

-	 * Remove Chunk: only from queued

-	 */

-	public boolean removeChunk(PngChunk c) {

-		return queuedChunks.remove(c);

-	}

-

-	/**

-	 * add chunk to write queue

-	 */

-	public void queueChunk(PngChunk chunk, boolean replace, boolean priority) {

-		chunk.setPriority(priority);

-		if (replace) {

-			List<PngChunk> current = getById(chunk.id, true, false);

-			for (PngChunk chunk2 : current)

-				removeChunk(chunk2);

-		}

-		queuedChunks.add(chunk);

-	}

-

-	/**

-	 * this should be called only for ancillary chunks and PLTE (groups 1 - 3 - 5)

-	 **/

-	private static boolean shouldWrite(PngChunk c, int currentGroup) {

-		if (currentGroup == CHUNK_GROUP_2_PLTE)

-			return c.id.equals(ChunkHelper.PLTE);

-		if (currentGroup % 2 == 0)

-			throw new RuntimeException("?");

-		int minChunkGroup, maxChunkGroup;

-		if (c.mustGoBeforePLTE())

-			minChunkGroup = maxChunkGroup = ChunkList.CHUNK_GROUP_1_AFTERIDHR;

-		else if (c.mustGoBeforeIDAT()) {

-			maxChunkGroup = ChunkList.CHUNK_GROUP_3_AFTERPLTE;

-			minChunkGroup = c.mustGoAfterPLTE() ? ChunkList.CHUNK_GROUP_3_AFTERPLTE : ChunkList.CHUNK_GROUP_1_AFTERIDHR;

-		} else {

-			maxChunkGroup = ChunkList.CHUNK_GROUP_5_AFTERIDAT;

-			minChunkGroup = ChunkList.CHUNK_GROUP_1_AFTERIDHR;

-		}

-

-		int preferred = maxChunkGroup;

-		if (c.isWritePriority())

-			preferred = minChunkGroup;

-		if (ChunkHelper.isUnknown(c) && c.getChunkGroup() > 0)

-			preferred = c.getChunkGroup();

-		if (currentGroup == preferred)

-			return true;

-		if (currentGroup > preferred && currentGroup <= maxChunkGroup)

-			return true;

-		return false;

-	}

-

-	public int writeChunks(OutputStream os, int currentGroup) {

-		int cont = 0;

-		Iterator<PngChunk> it = queuedChunks.iterator();

-		while (it.hasNext()) {

-			PngChunk c = it.next();

-			if (!shouldWrite(c, currentGroup))

-				continue;

-			c.write(os);

-			chunks.add(c);

-			c.setChunkGroup(currentGroup);

-			it.remove();

-			cont++;

-		}

-		return cont;

-	}

-

-	/**

-	 * returns a copy of processed (read or writen) chunks

-	 */

-	public List<PngChunk> getChunks() {

-		return new ArrayList<PngChunk>(chunks);

-	}

-

-	public List<String> getChunksUnkown() {

-		List<String> l = new ArrayList<String>();

-		for (PngChunk chunk : chunks)

-			if (ChunkHelper.isUnknown(chunk))

-				l.add(chunk.id);

-		return l;

-	}

-

-	/**

-	 * returns a copy of queued (for write) chunks

-	 */

-	public List<PngChunk> getQueuedChunks() {

-		return new ArrayList<PngChunk>(queuedChunks);

-	}

-

-	/**

-	 * behaviour:

-	 * 

-	 * a chunk already processed matches : exception a chunk queued matches and overwrite=true: replace it , return true

-	 * a chunk queued matches and overwrite=false: do nothing, return false no matching: set it, return true

-	 * 

-	 * @param c

-	 * @param overwriteIfPresent

-	 * @return true if added chunk

-	 */

-	public boolean setChunk(PngChunk c, boolean overwriteIfPresent) {

-		List<PngChunk> list = getMatching(c, false, true); // processed

-		if (!list.isEmpty())

-			throw new PngjException("chunk " + c.id + " already set ");

-		list = getMatching(c, true, false); // queued

-		if (!list.isEmpty()) {

-			if (overwriteIfPresent) {

-				for (PngChunk cx : list)

-					removeChunk(cx);

-				queueChunk(c, false, false);

-				return true;

-			}

-			return false;

-		}

-		queueChunk(c, false, false);

-		return true;

-	}

-

-	/**

-	 * returns only one chunk or null if nothing found - does not include queued

-	 * 

-	 * If innerid!=null , the chunk is assumed to be PngChunkTextVar or PngChunkSPLT, and filtered by that id

-	 * 

-	 * If more than one chunk (after filtering by inner id) is found, then an exception is thrown (failifMultiple=true)

-	 * or the last one is returned (failifMultiple=false)

-	 **/

-	public PngChunk getChunk1(String id, String innerid, boolean failIfMultiple) {

-		List<PngChunk> list = getChunks(id);

-		if (list.isEmpty())

-			return null;

-		if (innerid != null) {

-			List<PngChunk> list2 = new ArrayList<PngChunk>();

-			for (PngChunk c : list) {

-				if (c instanceof PngChunkTextVar)

-					if (((PngChunkTextVar) c).getKey().equals(innerid))

-						list2.add(c);

-				if (c instanceof PngChunkSPLT)

-					if (((PngChunkSPLT) c).getPalName().equals(innerid))

-						list2.add(c);

-			}

-			list = list2;

-		}

-		if (list.isEmpty())

-			return null;

-		if (list.size() > 1 && failIfMultiple)

-			throw new PngjException("unexpected multiple chunks id=" + id);

-		return list.get(list.size() - 1);

-	}

-

-	public PngChunk getChunk1(String id) {

-		return getChunk1(id, null, true);

-	}

-	

-	public List<PngChunk> getChunks(String id) { // not including queued

-		return getById(id, false, true);

-	}

-

-	private List<PngChunk> getMatching(PngChunk cnew, boolean includeQueued, boolean includeProcessed) {

-		List<PngChunk> list = new ArrayList<PngChunk>();

-		if (includeQueued)

-			for (PngChunk c : getQueuedChunks())

-				if (matches(cnew, c))

-					list.add(c);

-		if (includeProcessed)

-			for (PngChunk c : getChunks())

-				if (matches(cnew, c))

-					list.add(c);

-		return list;

-	}

-

-	/**

-	 * MY adhoc criteria: two chunks "match" if they have same id and (perhaps, if multiple are allowed) if the match

-	 * also in some "internal key" (eg: key for string values, palette for sPLT, etc)

-	 * 

-	 * @return true if "matches"

-	 */

-	public static boolean matches(PngChunk c2, PngChunk c1) {

-		if (c1 == null || c2 == null || !c1.id.equals(c2.id))

-			return false;

-		// same id

-		if (c1.getClass() != c2.getClass())

-			return false; // should not happen

-		if (!c2.allowsMultiple())

-			return true;

-		if (c1 instanceof PngChunkTextVar) {

-			return ((PngChunkTextVar) c1).getKey().equals(((PngChunkTextVar) c2).getKey());

-		}

-		if (c1 instanceof PngChunkSPLT) {

-			return ((PngChunkSPLT) c1).getPalName().equals(((PngChunkSPLT) c2).getPalName());

-		}

-		// unknown chunks that allow multiple? consider they don't match

-		return false;

-	}

-	

-	public String toString() {

-		return "ChunkList: processed: " + chunks.size() + " queue: " + queuedChunks.size();

-	}

-

-	/**

-	 * for debugging

-	 */

-	public String toStringFull() {

-		StringBuilder sb = new StringBuilder(toString());

-		sb.append("\n Processed:\n");

-		for (PngChunk chunk : chunks) {

-			sb.append(chunk).append(" G=" + chunk.getChunkGroup() + "\n");

-		}

-		if (!queuedChunks.isEmpty()) {

-			sb.append(" Queued:\n");

-			for (PngChunk chunk : chunks) {

-				sb.append(chunk).append("\n");

-			}

-

-		}

-		return sb.toString();

-	}

-

-}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java
index a3f85355c..1fa00380a 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java
@@ -1,10 +1,28 @@
 package jogamp.opengl.util.pngj.chunks;

 

+/**

+ * Defines gral strategy about what to do with ancillary (non-critical) chunks

+ * when reading

+ */

 public enum ChunkLoadBehaviour {

-	// what to do with non critical chunks when reading?

-	LOAD_CHUNK_NEVER, /* ignore non-critical chunks */

-	LOAD_CHUNK_KNOWN, /* load chunk if 'known' */

-	LOAD_CHUNK_IF_SAFE, /* load chunk if 'known' or safe to copy */

-	LOAD_CHUNK_ALWAYS /* load chunk always */

-	;

+	/**

+	 * All non-critical chunks are skipped

+	 */

+	LOAD_CHUNK_NEVER,

+	/**

+	 * Ancillary chunks are loaded only if 'known' (registered with the

+	 * factory).

+	 */

+	LOAD_CHUNK_KNOWN,

+	/**

+	 *

+	 * Load chunk if "known" or "safe to copy".

+	 */

+	LOAD_CHUNK_IF_SAFE,

+	/**

+	 * Load all chunks. <br>

+	 * Notice that other restrictions might apply, see

+	 * PngReader.skipChunkMaxSize PngReader.skipChunkIds

+	 */

+	LOAD_CHUNK_ALWAYS;

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkPredicate.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkPredicate.java
new file mode 100644
index 000000000..4695ccf44
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkPredicate.java
@@ -0,0 +1,14 @@
+package jogamp.opengl.util.pngj.chunks;
+
+/**
+ * Decides if another chunk "matches", according to some criterion
+ */
+public interface ChunkPredicate {
+	/**
+	 * The other chunk matches with this one
+	 *
+	 * @param chunk
+	 * @return true if match
+	 */
+	boolean match(PngChunk chunk);
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java
index 6770d5e95..dcb1958df 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java
@@ -5,24 +5,51 @@ import java.io.InputStream;
 import java.io.OutputStream;

 import java.util.zip.CRC32;

 

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjBadCrcException;

 import jogamp.opengl.util.pngj.PngjOutputException;

 

 

 /**

- * Wraps the raw chunk data Short lived object, to be created while serialing/deserializing Do not reuse it for

- * different chunks

- * 

- * see http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html

+ * Raw (physical) chunk.

+ * <p>

+ * Short lived object, to be created while serialing/deserializing Do not reuse

+ * it for different chunks. <br>

+ * See http://www.libpng.org/pub/png/spec/1.2/PNG-Structure.html

  */

 public class ChunkRaw {

+	/**

+	 * The length counts only the data field, not itself, the chunk type code,

+	 * or the CRC. Zero is a valid length. Although encoders and decoders should

+	 * treat the length as unsigned, its value must not exceed 231-1 bytes.

+	 */

 	public final int len;

-	public final byte[] idbytes = new byte[4]; // 4 bytes

-	public byte[] data = null; // crc not included

+

+	/**

+	 * A 4-byte chunk type code. uppercase and lowercase ASCII letters

+	 */

+	public final byte[] idbytes = new byte[4];

+

+	/**

+	 * The data bytes appropriate to the chunk type, if any. This field can be

+	 * of zero length. Does not include crc

+	 */

+	public byte[] data = null;

+	/**

+	 * A 4-byte CRC (Cyclic Redundancy Check) calculated on the preceding bytes

+	 * in the chunk, including the chunk type code and chunk data fields, but

+	 * not including the length field.

+	 */

 	private int crcval = 0;

 

-	// public int offset=-1; // only for read chunks - informational

+	/**

+	 * @param len

+	 *            : data len

+	 * @param idbytes

+	 *            : chunk type (deep copied)

+	 * @param alloc

+	 *            : it true, the data array will be allocced

+	 */

 	public ChunkRaw(int len, byte[] idbytes, boolean alloc) {

 		this.len = len;

 		System.arraycopy(idbytes, 0, this.idbytes, 0, 4);

@@ -30,54 +57,60 @@ public class ChunkRaw {
 			allocData();

 	}

 

-	public void writeChunk(OutputStream os) {

-		if (idbytes.length != 4)

-			throw new PngjOutputException("bad chunkid [" + ChunkHelper.toString(idbytes) + "]");

-		computeCrc();

-		PngHelper.writeInt4(os, len);

-		PngHelper.writeBytes(os, idbytes);

-		if (len > 0)

-			PngHelper.writeBytes(os, data, 0, len);

-		// System.err.println("writing chunk " + this.toString() + "crc=" + crcval);

-

-		PngHelper.writeInt4(os, crcval);

+	private void allocData() {

+		if (data == null || data.length < len)

+			data = new byte[len];

 	}

 

 	/**

-	 * called after setting data, before writing to os

+	 * this is called after setting data, before writing to os

 	 */

-	private void computeCrc() {

-		CRC32 crcengine = PngHelper.getCRC();

+	private int computeCrc() {

+		CRC32 crcengine = PngHelperInternal.getCRC();

 		crcengine.reset();

 		crcengine.update(idbytes, 0, 4);

 		if (len > 0)

 			crcengine.update(data, 0, len); //

-		crcval = (int) crcengine.getValue();

+		return (int) crcengine.getValue();

 	}

 

-	public String toString() {

-		return "chunkid=" + ChunkHelper.toString(idbytes) + " len=" + len;

+	/**

+	 * Computes the CRC and writes to the stream. If error, a

+	 * PngjOutputException is thrown

+	 */

+	public void writeChunk(OutputStream os) {

+		if (idbytes.length != 4)

+			throw new PngjOutputException("bad chunkid [" + ChunkHelper.toString(idbytes) + "]");

+		crcval = computeCrc();

+		PngHelperInternal.writeInt4(os, len);

+		PngHelperInternal.writeBytes(os, idbytes);

+		if (len > 0)

+			PngHelperInternal.writeBytes(os, data, 0, len);

+		PngHelperInternal.writeInt4(os, crcval);

 	}

 

 	/**

-	 * position before: just after chunk id. positon after: after crc Data should be already allocated. Checks CRC

-	 * Return number of byte read.

+	 * position before: just after chunk id. positon after: after crc Data

+	 * should be already allocated. Checks CRC Return number of byte read.

 	 */

-	public int readChunkData(InputStream is) {

-		PngHelper.readBytes(is, data, 0, len);

-		int crcori = PngHelper.readInt4(is);

-		computeCrc();

-		if (crcori != crcval)

-			throw new PngjBadCrcException("crc invalid for chunk " + toString() + " calc=" + crcval + " read=" + crcori);

+	public int readChunkData(InputStream is, boolean checkCrc) {

+		PngHelperInternal.readBytes(is, data, 0, len);

+		crcval = PngHelperInternal.readInt4(is);

+		if (checkCrc) {

+			int crc = computeCrc();

+			if (crc != crcval)

+				throw new PngjBadCrcException("chunk: " + this + " crc calc=" + crc + " read=" + crcval);

+		}

 		return len + 4;

 	}

 

-	public ByteArrayInputStream getAsByteStream() { // only the data

+	ByteArrayInputStream getAsByteStream() { // only the data

 		return new ByteArrayInputStream(data);

 	}

 

-	private void allocData() {

-		if (data == null || data.length < len)

-			data = new byte[len];

+	@Override

+	public String toString() {

+		return "chunkid=" + ChunkHelper.toString(idbytes) + " len=" + len;

 	}

+

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksList.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksList.java
new file mode 100644
index 000000000..75107d761
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksList.java
@@ -0,0 +1,181 @@
+package jogamp.opengl.util.pngj.chunks;

+

+import java.util.ArrayList;

+import java.util.HashMap;

+import java.util.List;

+

+import jogamp.opengl.util.pngj.ImageInfo;

+import jogamp.opengl.util.pngj.PngjException;

+

+/**

+ * All chunks that form an image, read or to be written.

+ * <p>

+ * chunks include all chunks, but IDAT is a single pseudo chunk without data

+ **/

+public class ChunksList {

+	// ref: http://www.w3.org/TR/PNG/#table53

+	public static final int CHUNK_GROUP_0_IDHR = 0; // required - single

+	public static final int CHUNK_GROUP_1_AFTERIDHR = 1; // optional - multiple

+	public static final int CHUNK_GROUP_2_PLTE = 2; // optional - single

+	public static final int CHUNK_GROUP_3_AFTERPLTE = 3; // optional - multple

+	public static final int CHUNK_GROUP_4_IDAT = 4; // required (single pseudo chunk)

+	public static final int CHUNK_GROUP_5_AFTERIDAT = 5; // optional - multple

+	public static final int CHUNK_GROUP_6_END = 6; // only 1 chunk - requried

+

+	/**

+	 * All chunks, read (or written)

+	 *

+	 * But IDAT is a single pseudo chunk without data

+	 */

+	protected List<PngChunk> chunks = new ArrayList<PngChunk>();

+

+	final ImageInfo imageInfo; // only required for writing

+

+	public ChunksList(ImageInfo imfinfo) {

+		this.imageInfo = imfinfo;

+	}

+

+	/**

+	 * Keys of processed (read or writen) chunks

+	 *

+	 * @return key:chunk id, val: number of occurrences

+	 */

+	public HashMap<String, Integer> getChunksKeys() {

+		HashMap<String, Integer> ck = new HashMap<String, Integer>();

+		for (PngChunk c : chunks) {

+			ck.put(c.id, ck.containsKey(c.id) ? ck.get(c.id) + 1 : 1);

+		}

+		return ck;

+	}

+

+	/**

+	 * Returns a copy of the list (but the chunks are not copied) <b> This

+	 * should not be used for general metadata handling

+	 */

+	public ArrayList<PngChunk> getChunks() {

+		return new ArrayList<PngChunk>(chunks);

+	}

+

+	protected static List<PngChunk> getXById(final List<PngChunk> list, final String id, final String innerid) {

+		if (innerid == null)

+			return ChunkHelper.filterList(list, new ChunkPredicate() {

+				@Override

+				public boolean match(PngChunk c) {

+					return c.id.equals(id);

+				}

+			});

+		else

+			return ChunkHelper.filterList(list, new ChunkPredicate() {

+				@Override

+				public boolean match(PngChunk c) {

+					if (!c.id.equals(id))

+						return false;

+					if (c instanceof PngChunkTextVar && !((PngChunkTextVar) c).getKey().equals(innerid))

+						return false;

+					if (c instanceof PngChunkSPLT && !((PngChunkSPLT) c).getPalName().equals(innerid))

+						return false;

+					return true;

+				}

+			});

+	}

+

+	/**

+	 * Adds chunk in next position. This is used onyl by the pngReader

+	 */

+	public void appendReadChunk(PngChunk chunk, int chunkGroup) {

+		chunk.setChunkGroup(chunkGroup);

+		chunks.add(chunk);

+	}

+

+	/**

+	 * All chunks with this ID

+	 *

+	 * @param id

+	 * @return List, empty if none

+	 */

+	public List<? extends PngChunk> getById(final String id) {

+		return getById(id, null);

+	}

+

+	/**

+	 * If innerid!=null and the chunk is PngChunkTextVar or PngChunkSPLT, it's

+	 * filtered by that id

+	 *

+	 * @param id

+	 * @return innerid Only used for text and SPLT chunks

+	 * @return List, empty if none

+	 */

+	public List<? extends PngChunk> getById(final String id, final String innerid) {

+		return getXById(chunks, id, innerid);

+	}

+

+	/**

+	 * Returns only one chunk

+	 *

+	 * @param id

+	 * @return First chunk found, null if not found

+	 */

+	public PngChunk getById1(final String id) {

+		return getById1(id, false);

+	}

+

+	/**

+	 * Returns only one chunk or null if nothing found - does not include queued

+	 * <p>

+	 * If more than one chunk is found, then an exception is thrown

+	 * (failifMultiple=true or chunk is single) or the last one is returned

+	 * (failifMultiple=false)

+	 **/

+	public PngChunk getById1(final String id, final boolean failIfMultiple) {

+		return getById1(id, null, failIfMultiple);

+	}

+

+	/**

+	 * Returns only one chunk or null if nothing found - does not include queued

+	 * <p>

+	 * If more than one chunk (after filtering by inner id) is found, then an

+	 * exception is thrown (failifMultiple=true or chunk is single) or the last

+	 * one is returned (failifMultiple=false)

+	 **/

+	public PngChunk getById1(final String id, final String innerid, final boolean failIfMultiple) {

+		List<? extends PngChunk> list = getById(id, innerid);

+		if (list.isEmpty())

+			return null;

+		if (list.size() > 1 && (failIfMultiple || !list.get(0).allowsMultiple()))

+			throw new PngjException("unexpected multiple chunks id=" + id);

+		return list.get(list.size() - 1);

+	}

+

+	/**

+	 * Finds all chunks "equivalent" to this one

+	 *

+	 * @param c2

+	 * @return Empty if nothing found

+	 */

+	public List<PngChunk> getEquivalent(final PngChunk c2) {

+		return ChunkHelper.filterList(chunks, new ChunkPredicate() {

+			@Override

+			public boolean match(PngChunk c) {

+				return ChunkHelper.equivalent(c, c2);

+			}

+		});

+	}

+

+	@Override

+	public String toString() {

+		return "ChunkList: read: " + chunks.size();

+	}

+

+	/**

+	 * for debugging

+	 */

+	public String toStringFull() {

+		StringBuilder sb = new StringBuilder(toString());

+		sb.append("\n Read:\n");

+		for (PngChunk chunk : chunks) {

+			sb.append(chunk).append(" G=" + chunk.getChunkGroup() + "\n");

+		}

+		return sb.toString();

+	}

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java
new file mode 100644
index 000000000..c502e9071
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java
@@ -0,0 +1,176 @@
+package jogamp.opengl.util.pngj.chunks;
+
+import java.io.OutputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+
+import jogamp.opengl.util.pngj.ImageInfo;
+import jogamp.opengl.util.pngj.PngjException;
+import jogamp.opengl.util.pngj.PngjOutputException;
+
+public class ChunksListForWrite extends ChunksList {
+
+	/**
+	 * chunks not yet writen - does not include IHDR, IDAT, END, perhaps yes
+	 * PLTE
+	 */
+	private final List<PngChunk> queuedChunks = new ArrayList<PngChunk>();
+
+	// redundant, just for eficciency
+	private HashMap<String, Integer> alreadyWrittenKeys = new HashMap<String, Integer>();
+
+	public ChunksListForWrite(ImageInfo imfinfo) {
+		super(imfinfo);
+	}
+
+	/**
+	 * Same as getById(), but looking in the queued chunks
+	 */
+	public List<? extends PngChunk> getQueuedById(final String id) {
+		return getQueuedById(id, null);
+	}
+
+	/**
+	 * Same as getById(), but looking in the queued chunks
+	 */
+	public List<? extends PngChunk> getQueuedById(final String id, final String innerid) {
+		return getXById(queuedChunks, id, innerid);
+	}
+
+	/**
+	 * Same as getById1(), but looking in the queued chunks
+	 **/
+	public PngChunk getQueuedById1(final String id, final String innerid, final boolean failIfMultiple) {
+		List<? extends PngChunk> list = getQueuedById(id, innerid);
+		if (list.isEmpty())
+			return null;
+		if (list.size() > 1 && (failIfMultiple || !list.get(0).allowsMultiple()))
+			throw new PngjException("unexpected multiple chunks id=" + id);
+		return list.get(list.size() - 1);
+	}
+
+	/**
+	 * Same as getById1(), but looking in the queued chunks
+	 **/
+	public PngChunk getQueuedById1(final String id, final boolean failIfMultiple) {
+		return getQueuedById1(id, null, failIfMultiple);
+	}
+
+	/**
+	 * Same as getById1(), but looking in the queued chunks
+	 **/
+	public PngChunk getQueuedById1(final String id) {
+		return getQueuedById1(id, false);
+	}
+
+	/**
+	 * Remove Chunk: only from queued
+	 *
+	 * WARNING: this depends on c.equals() implementation, which is
+	 * straightforward for SingleChunks. For MultipleChunks, it will normally
+	 * check for reference equality!
+	 */
+	public boolean removeChunk(PngChunk c) {
+		return queuedChunks.remove(c);
+	}
+
+	/**
+	 * Adds chunk to queue
+	 *
+	 * Does not check for duplicated or anything
+	 *
+	 * @param c
+	 */
+	public boolean queue(PngChunk c) {
+		queuedChunks.add(c);
+		return true;
+	}
+
+	/**
+	 * this should be called only for ancillary chunks and PLTE (groups 1 - 3 -
+	 * 5)
+	 **/
+	private static boolean shouldWrite(PngChunk c, int currentGroup) {
+		if (currentGroup == CHUNK_GROUP_2_PLTE)
+			return c.id.equals(ChunkHelper.PLTE);
+		if (currentGroup % 2 == 0)
+			throw new PngjOutputException("bad chunk group?");
+		int minChunkGroup, maxChunkGroup;
+		if (c.getOrderingConstraint().mustGoBeforePLTE())
+			minChunkGroup = maxChunkGroup = ChunksList.CHUNK_GROUP_1_AFTERIDHR;
+		else if (c.getOrderingConstraint().mustGoBeforeIDAT()) {
+			maxChunkGroup = ChunksList.CHUNK_GROUP_3_AFTERPLTE;
+			minChunkGroup = c.getOrderingConstraint().mustGoAfterPLTE() ? ChunksList.CHUNK_GROUP_3_AFTERPLTE
+					: ChunksList.CHUNK_GROUP_1_AFTERIDHR;
+		} else {
+			maxChunkGroup = ChunksList.CHUNK_GROUP_5_AFTERIDAT;
+			minChunkGroup = ChunksList.CHUNK_GROUP_1_AFTERIDHR;
+		}
+
+		int preferred = maxChunkGroup;
+		if (c.hasPriority())
+			preferred = minChunkGroup;
+		if (ChunkHelper.isUnknown(c) && c.getChunkGroup() > 0)
+			preferred = c.getChunkGroup();
+		if (currentGroup == preferred)
+			return true;
+		if (currentGroup > preferred && currentGroup <= maxChunkGroup)
+			return true;
+		return false;
+	}
+
+	public int writeChunks(OutputStream os, int currentGroup) {
+		int cont = 0;
+		Iterator<PngChunk> it = queuedChunks.iterator();
+		while (it.hasNext()) {
+			PngChunk c = it.next();
+			if (!shouldWrite(c, currentGroup))
+				continue;
+			if (ChunkHelper.isCritical(c.id) && !c.id.equals(ChunkHelper.PLTE))
+				throw new PngjOutputException("bad chunk queued: " + c);
+			if (alreadyWrittenKeys.containsKey(c.id) && !c.allowsMultiple())
+				throw new PngjOutputException("duplicated chunk does not allow multiple: " + c);
+			c.write(os);
+			chunks.add(c);
+			alreadyWrittenKeys.put(c.id, alreadyWrittenKeys.containsKey(c.id) ? alreadyWrittenKeys.get(c.id) + 1 : 1);
+			c.setChunkGroup(currentGroup);
+			it.remove();
+			cont++;
+		}
+		return cont;
+	}
+
+	/**
+	 * warning: this is NOT a copy, do not modify
+	 */
+	public List<PngChunk> getQueuedChunks() {
+		return queuedChunks;
+	}
+
+	@Override
+	public String toString() {
+		return "ChunkList: written: " + chunks.size() + " queue: " + queuedChunks.size();
+	}
+
+	/**
+	 * for debugging
+	 */
+	@Override
+	public String toStringFull() {
+		StringBuilder sb = new StringBuilder(toString());
+		sb.append("\n Written:\n");
+		for (PngChunk chunk : chunks) {
+			sb.append(chunk).append(" G=" + chunk.getChunkGroup() + "\n");
+		}
+		if (!queuedChunks.isEmpty()) {
+			sb.append(" Queued:\n");
+			for (PngChunk chunk : queuedChunks) {
+				sb.append(chunk).append("\n");
+			}
+
+		}
+		return sb.toString();
+	}
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunk.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunk.java
index 2df9fd1f3..6cd86eb98 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunk.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunk.java
@@ -6,26 +6,91 @@ import java.util.HashMap;
 import java.util.Map;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngjException;

+import jogamp.opengl.util.pngj.PngjExceptionInternal;

 

-

-// see http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html

+/**

+ * Represents a instance of a PNG chunk.

+ * <p>

+ * See <a

+ * href="http://www.libpng.org/pub/png/spec/1.2/PNG-Chunks.html">http://www

+ * .libpng.org/pub/png/spec/1.2/PNG-Chunks .html</a> </a>

+ * <p>

+ * Concrete classes should extend {@link PngChunkSingle} or

+ * {@link PngChunkMultiple}

+ * <p>

+ * Note that some methods/fields are type-specific (getOrderingConstraint(),

+ * allowsMultiple()),<br>

+ * some are 'almost' type-specific (id,crit,pub,safe; the exception is

+ * PngUKNOWN), <br>

+ * and the rest are instance-specific

+ */

 public abstract class PngChunk {

 

-	public final String id; // 4 letters

+	/**

+	 * Chunk-id: 4 letters

+	 */

+	public final String id;

+	/**

+	 * Autocomputed at creation time

+	 */

 	public final boolean crit, pub, safe;

-	private int lenori = -1; // merely informational, for read chunks

 

-	private boolean writePriority = false; // for queued chunks

 	protected final ImageInfo imgInfo;

 

-	private int chunkGroup = -1; // chunk group where it was read or writen

+	/**

+	 * Possible ordering constraint for a PngChunk type -only relevant for

+	 * ancillary chunks. Theoretically, there could be more general constraints,

+	 * but these cover the constraints for standard chunks.

+	 */

+	public enum ChunkOrderingConstraint {

+		/**

+		 * no ordering constraint

+		 */

+		NONE,

+		/**

+		 * Must go before PLTE (and hence, also before IDAT)

+		 */

+		BEFORE_PLTE_AND_IDAT,

+		/**

+		 * Must go after PLTE but before IDAT

+		 */

+		AFTER_PLTE_BEFORE_IDAT,

+		/**

+		 * Must before IDAT (before or after PLTE)

+		 */

+		BEFORE_IDAT,

+		/**

+		 * Does not apply

+		 */

+		NA;

+

+		public boolean mustGoBeforePLTE() {

+			return this == BEFORE_PLTE_AND_IDAT;

+		}

+

+		public boolean mustGoBeforeIDAT() {

+			return this == BEFORE_IDAT || this == BEFORE_PLTE_AND_IDAT || this == AFTER_PLTE_BEFORE_IDAT;

+		}

+

+		public boolean mustGoAfterPLTE() {

+			return this == AFTER_PLTE_BEFORE_IDAT;

+		}

+	}

+

+	private boolean priority = false; // For writing. Queued chunks with high priority will be written as soon as

+										// possible

+

+	protected int chunkGroup = -1; // chunk group where it was read or writen

+	protected int length = -1; // merely informational, for read chunks

+	protected long offset = 0; // merely informational, for read chunks

 

 	/**

-	 * This static map defines which PngChunk class correspond to which ChunkID The client can add other chunks to this

-	 * map statically, before reading

+	 * This static map defines which PngChunk class correspond to which ChunkID

+	 * <p>

+	 * The client can add other chunks to this map statically, before reading an

+	 * image, calling PngChunk.factoryRegister(id,class)

 	 */

-	public final static Map<String, Class<? extends PngChunk>> factoryMap = new HashMap<String, Class<? extends PngChunk>>();

+	private final static Map<String, Class<? extends PngChunk>> factoryMap = new HashMap<String, Class<? extends PngChunk>>();

 	static {

 		factoryMap.put(ChunkHelper.IDAT, PngChunkIDAT.class);

 		factoryMap.put(ChunkHelper.IHDR, PngChunkIHDR.class);

@@ -45,6 +110,35 @@ public abstract class PngChunk {
 		factoryMap.put(ChunkHelper.sRGB, PngChunkSRGB.class);

 		factoryMap.put(ChunkHelper.hIST, PngChunkHIST.class);

 		factoryMap.put(ChunkHelper.sPLT, PngChunkSPLT.class);

+		// extended

+		factoryMap.put(PngChunkOFFS.ID, PngChunkOFFS.class);

+		factoryMap.put(PngChunkSTER.ID, PngChunkSTER.class);

+	}

+

+	/**

+	 * Registers a chunk-id (4 letters) to be associated with a PngChunk class

+	 * <p>

+	 * This method should be called by user code that wants to add some chunks

+	 * (not implmemented in this library) to the factory, so that the PngReader

+	 * knows about it.

+	 */

+	public static void factoryRegister(String chunkId, Class<? extends PngChunk> chunkClass) {

+		factoryMap.put(chunkId, chunkClass);

+	}

+

+	/**

+	 * True if the chunk-id type is known.

+	 * <p>

+	 * A chunk is known if we recognize its class, according with

+	 * <code>factoryMap</code>

+	 * <p>

+	 * This is not necessarily the same as being "STANDARD", or being

+	 * implemented in this library

+	 * <p>

+	 * Unknown chunks will be parsed as instances of {@link PngChunkUNKNOWN}

+	 */

+	public static boolean isKnown(String id) {

+		return factoryMap.containsKey(id);

 	}

 

 	protected PngChunk(String id, ImageInfo imgInfo) {

@@ -55,29 +149,21 @@ public abstract class PngChunk {
 		this.safe = ChunkHelper.isSafeToCopy(id);

 	}

 

-	public abstract ChunkRaw createChunk();

-

-	public abstract void parseFromChunk(ChunkRaw c);

-

-	// override to make deep copy from read data to write

-	public abstract void cloneDataFromRead(PngChunk other);

-

-	@SuppressWarnings("unchecked")

-	public static <T extends PngChunk> T cloneChunk(T chunk, ImageInfo info) {

-		PngChunk cn = factoryFromId(chunk.id, info);

-		if (cn.getClass() != chunk.getClass())

-			throw new PngjException("bad class cloning chunk: " + cn.getClass() + " " + chunk.getClass());

-		cn.cloneDataFromRead(chunk);

-		return (T) cn;

-	}

-

+	/**

+	 * This factory creates the corresponding chunk and parses the raw chunk.

+	 * This is used when reading.

+	 */

 	public static PngChunk factory(ChunkRaw chunk, ImageInfo info) {

 		PngChunk c = factoryFromId(ChunkHelper.toString(chunk.idbytes), info);

-		c.lenori = chunk.len;

-		c.parseFromChunk(chunk);

+		c.length = chunk.len;

+		c.parseFromRaw(chunk);

 		return c;

 	}

 

+	/**

+	 * Creates one new blank chunk of the corresponding type, according to

+	 * factoryMap (PngChunkUNKNOWN if not known)

+	 */

 	public static PngChunk factoryFromId(String cid, ImageInfo info) {

 		PngChunk chunk = null;

 		try {

@@ -87,66 +173,112 @@ public abstract class PngChunk {
 				chunk = constr.newInstance(info);

 			}

 		} catch (Exception e) {

-			// this can happend for unkown chunks

+			// this can happen for unkown chunks

 		}

 		if (chunk == null)

 			chunk = new PngChunkUNKNOWN(cid, info);

 		return chunk;

 	}

 

-	protected ChunkRaw createEmptyChunk(int len, boolean alloc) {

+	protected final ChunkRaw createEmptyChunk(int len, boolean alloc) {

 		ChunkRaw c = new ChunkRaw(len, ChunkHelper.toBytes(id), alloc);

 		return c;

 	}

 

-	@Override

-	public String toString() {

-		return "chunk id= " + id + " (" + lenori + ") c=" + getClass().getSimpleName();

+	/**

+	 * Makes a clone (deep copy) calling {@link #cloneDataFromRead(PngChunk)}

+	 */

+	@SuppressWarnings("unchecked")

+	public static <T extends PngChunk> T cloneChunk(T chunk, ImageInfo info) {

+		PngChunk cn = factoryFromId(chunk.id, info);

+		if (cn.getClass() != chunk.getClass())

+			throw new PngjExceptionInternal("bad class cloning chunk: " + cn.getClass() + " " + chunk.getClass());

+		cn.cloneDataFromRead(chunk);

+		return (T) cn;

 	}

 

-	void setPriority(boolean highPrioriy) {

-		writePriority = highPrioriy;

+	/**

+	 * In which "chunkGroup" (see {@link ChunksList}for definition) this chunks

+	 * instance was read or written.

+	 * <p>

+	 * -1 if not read or written (eg, queued)

+	 */

+	final public int getChunkGroup() {

+		return chunkGroup;

 	}

 

-	void write(OutputStream os) {

-		ChunkRaw c = createChunk();

-		if (c == null)

-			throw new PngjException("null chunk ! creation failed for " + this);

-		c.writeChunk(os);

+	/**

+	 * @see #getChunkGroup()

+	 */

+	final public void setChunkGroup(int chunkGroup) {

+		this.chunkGroup = chunkGroup;

 	}

 

-	public boolean isWritePriority() {

-		return writePriority;

+	public boolean hasPriority() {

+		return priority;

 	}

 

-	/** must be overriden - only relevant for ancillary chunks */

-	public boolean allowsMultiple() {

-		return false; // override if allows multiple ocurrences

+	public void setPriority(boolean priority) {

+		this.priority = priority;

 	}

 

-	/** mustGoBeforeXX/After must be overriden - only relevant for ancillary chunks */

-	public boolean mustGoBeforeIDAT() {

-		return false;

+	final void write(OutputStream os) {

+		ChunkRaw c = createRawChunk();

+		if (c == null)

+			throw new PngjExceptionInternal("null chunk ! creation failed for " + this);

+		c.writeChunk(os);

 	}

 

-	public boolean mustGoBeforePLTE() {

-		return false;

+	public int getLength() {

+		return length;

 	}

 

-	public boolean mustGoAfterPLTE() {

-		return false;

-	}

+	/*

+	 * public void setLength(int length) { this.length = length; }

+	 */

 

-	static boolean isKnown(String id) {

-		return factoryMap.containsKey(id);

+	public long getOffset() {

+		return offset;

 	}

 

-	public int getChunkGroup() {

-		return chunkGroup;

+	public void setOffset(long offset) {

+		this.offset = offset;

 	}

 

-	public void setChunkGroup(int chunkGroup) {

-		this.chunkGroup = chunkGroup;

+	/**

+	 * Creates the physical chunk. This is used when writing (serialization).

+	 * Each particular chunk class implements its own logic.

+	 *

+	 * @return A newly allocated and filled raw chunk

+	 */

+	public abstract ChunkRaw createRawChunk();

+

+	/**

+	 * Parses raw chunk and fill inside data. This is used when reading

+	 * (deserialization). Each particular chunk class implements its own logic.

+	 */

+	public abstract void parseFromRaw(ChunkRaw c);

+

+	/**

+	 * Makes a copy of the chunk.

+	 * <p>

+	 * This is used when copying chunks from a reader to a writer

+	 * <p>

+	 * It should normally be a deep copy, and after the cloning

+	 * this.equals(other) should return true

+	 */

+	public abstract void cloneDataFromRead(PngChunk other);

+

+	public abstract boolean allowsMultiple(); // this is implemented in PngChunkMultiple/PngChunSingle

+

+	/**

+	 * see {@link ChunkOrderingConstraint}

+	 */

+	public abstract ChunkOrderingConstraint getOrderingConstraint();

+

+	@Override

+	public String toString() {

+		return "chunk id= " + id + " (len=" + length + " offset=" + offset + ") c=" + getClass().getSimpleName();

 	}

 

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkBKGD.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkBKGD.java
index 51bbcb832..ea6235432 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkBKGD.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkBKGD.java
@@ -1,14 +1,18 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * bKGD Chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11bKGD

+ * <p>

+ * this chunk structure depends on the image type

  */

-public class PngChunkBKGD extends PngChunk {

-	// http://www.w3.org/TR/PNG/#11bKGD

-	// this chunk structure depends on the image type

+public class PngChunkBKGD extends PngChunkSingle {

+	public final static String ID = ChunkHelper.bKGD;

 	// only one of these is meaningful

 	private int gray;

 	private int red, green, blue;

@@ -19,43 +23,38 @@ public class PngChunkBKGD extends PngChunk {
 	}

 

 	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.AFTER_PLTE_BEFORE_IDAT;

 	}

 

 	@Override

-	public boolean mustGoAfterPLTE() {

-		return true;

-	}

-

-	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = null;

 		if (imgInfo.greyscale) {

 			c = createEmptyChunk(2, true);

-			PngHelper.writeInt2tobytes(gray, c.data, 0);

+			PngHelperInternal.writeInt2tobytes(gray, c.data, 0);

 		} else if (imgInfo.indexed) {

 			c = createEmptyChunk(1, true);

 			c.data[0] = (byte) paletteIndex;

 		} else {

 			c = createEmptyChunk(6, true);

-			PngHelper.writeInt2tobytes(red, c.data, 0);

-			PngHelper.writeInt2tobytes(green, c.data, 0);

-			PngHelper.writeInt2tobytes(blue, c.data, 0);

+			PngHelperInternal.writeInt2tobytes(red, c.data, 0);

+			PngHelperInternal.writeInt2tobytes(green, c.data, 0);

+			PngHelperInternal.writeInt2tobytes(blue, c.data, 0);

 		}

 		return c;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		if (imgInfo.greyscale) {

-			gray = PngHelper.readInt2fromBytes(c.data, 0);

+			gray = PngHelperInternal.readInt2fromBytes(c.data, 0);

 		} else if (imgInfo.indexed) {

 			paletteIndex = (int) (c.data[0] & 0xff);

 		} else {

-			red = PngHelper.readInt2fromBytes(c.data, 0);

-			green = PngHelper.readInt2fromBytes(c.data, 2);

-			blue = PngHelper.readInt2fromBytes(c.data, 4);

+			red = PngHelperInternal.readInt2fromBytes(c.data, 0);

+			green = PngHelperInternal.readInt2fromBytes(c.data, 2);

+			blue = PngHelperInternal.readInt2fromBytes(c.data, 4);

 		}

 	}

 

@@ -71,7 +70,7 @@ public class PngChunkBKGD extends PngChunk {
 

 	/**

 	 * Set gray value (0-255 if bitdept=8)

-	 * 

+	 *

 	 * @param gray

 	 */

 	public void setGray(int gray) {

@@ -88,7 +87,7 @@ public class PngChunkBKGD extends PngChunk {
 

 	/**

 	 * Set pallette index

-	 * 

+	 *

 	 */

 	public void setPaletteIndex(int i) {

 		if (!imgInfo.indexed)

@@ -104,7 +103,7 @@ public class PngChunkBKGD extends PngChunk {
 

 	/**

 	 * Set rgb values

-	 * 

+	 *

 	 */

 	public void setRGB(int r, int g, int b) {

 		if (imgInfo.greyscale || imgInfo.indexed)

@@ -119,4 +118,5 @@ public class PngChunkBKGD extends PngChunk {
 			throw new PngjException("only rgb or rgba images support this");

 		return new int[] { red, green, blue };

 	}

+

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkCHRM.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkCHRM.java
index 4380761c7..25a4bf2d6 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkCHRM.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkCHRM.java
@@ -1,12 +1,17 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * cHRM chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11cHRM

  */

-public class PngChunkCHRM extends PngChunk {

+public class PngChunkCHRM extends PngChunkSingle {

+	public final static String ID = ChunkHelper.cHRM;

+

 	// http://www.w3.org/TR/PNG/#11cHRM

 	private double whitex, whitey;

 	private double redx, redy;

@@ -14,46 +19,41 @@ public class PngChunkCHRM extends PngChunk {
 	private double bluex, bluey;

 

 	public PngChunkCHRM(ImageInfo info) {

-		super(ChunkHelper.cHRM, info);

-	}

-

-	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforePLTE() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.AFTER_PLTE_BEFORE_IDAT;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = null;

 		c = createEmptyChunk(32, true);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(whitex), c.data, 0);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(whitey), c.data, 4);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(redx), c.data, 8);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(redy), c.data, 12);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(greenx), c.data, 16);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(greeny), c.data, 20);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(bluex), c.data, 24);

-		PngHelper.writeInt4tobytes(PngHelper.doubleToInt100000(bluey), c.data, 28);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(whitex), c.data, 0);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(whitey), c.data, 4);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(redx), c.data, 8);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(redy), c.data, 12);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(greenx), c.data, 16);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(greeny), c.data, 20);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(bluex), c.data, 24);

+		PngHelperInternal.writeInt4tobytes(PngHelperInternal.doubleToInt100000(bluey), c.data, 28);

 		return c;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		if (c.len != 32)

 			throw new PngjException("bad chunk " + c);

-		whitex = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 0));

-		whitey = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 4));

-		redx = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 8));

-		redy = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 12));

-		greenx = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 16));

-		greeny = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 20));

-		bluex = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 24));

-		bluey = PngHelper.intToDouble100000(PngHelper.readInt4fromBytes(c.data, 28));

+		whitex = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 0));

+		whitey = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 4));

+		redx = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 8));

+		redy = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 12));

+		greenx = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 16));

+		greeny = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 20));

+		bluex = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 24));

+		bluey = PngHelperInternal.intToDouble100000(PngHelperInternal.readInt4fromBytes(c.data, 28));

 	}

 

 	@Override

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkGAMA.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkGAMA.java
index 184ee9ffa..74640746e 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkGAMA.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkGAMA.java
@@ -1,42 +1,42 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * gAMA chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11gAMA

  */

-public class PngChunkGAMA extends PngChunk {

+public class PngChunkGAMA extends PngChunkSingle {

+	public final static String ID = ChunkHelper.gAMA;

+

 	// http://www.w3.org/TR/PNG/#11gAMA

 	private double gamma;

 

 	public PngChunkGAMA(ImageInfo info) {

-		super(ChunkHelper.gAMA, info);

-	}

-

-	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforePLTE() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = createEmptyChunk(4, true);

 		int g = (int) (gamma * 100000 + 0.5);

-		PngHelper.writeInt4tobytes(g, c.data, 0);

+		PngHelperInternal.writeInt4tobytes(g, c.data, 0);

 		return c;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw chunk) {

+	public void parseFromRaw(ChunkRaw chunk) {

 		if (chunk.len != 4)

 			throw new PngjException("bad chunk " + chunk);

-		int g = PngHelper.readInt4fromBytes(chunk.data, 0);

+		int g = PngHelperInternal.readInt4fromBytes(chunk.data, 0);

 		gamma = ((double) g) / 100000.0;

 	}

 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkHIST.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkHIST.java
index b0f02ea37..6dc3fd9ec 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkHIST.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkHIST.java
@@ -1,50 +1,48 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * hIST chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11hIST <br>

+ * only for palette images

  */

-public class PngChunkHIST extends PngChunk {

-	// http://www.w3.org/TR/PNG/#11hIST

-	// only for palette images

+public class PngChunkHIST extends PngChunkSingle {

+	public final static String ID = ChunkHelper.hIST;

 

 	private int[] hist = new int[0]; // should have same lenght as palette

 

 	public PngChunkHIST(ImageInfo info) {

-		super(ChunkHelper.hIST, info);

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.AFTER_PLTE_BEFORE_IDAT;

 	}

 

 	@Override

-	public boolean mustGoAfterPLTE() {

-		return true;

-	}

-

-	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		if (!imgInfo.indexed)

 			throw new PngjException("only indexed images accept a HIST chunk");

 		int nentries = c.data.length / 2;

 		hist = new int[nentries];

 		for (int i = 0; i < hist.length; i++) {

-			hist[i] = PngHelper.readInt2fromBytes(c.data, i * 2);

+			hist[i] = PngHelperInternal.readInt2fromBytes(c.data, i * 2);

 		}

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		if (!imgInfo.indexed)

 			throw new PngjException("only indexed images accept a HIST chunk");

 		ChunkRaw c = null;

 		c = createEmptyChunk(hist.length * 2, true);

 		for (int i = 0; i < hist.length; i++) {

-			PngHelper.writeInt2tobytes(hist[i], c.data, i * 2);

+			PngHelperInternal.writeInt2tobytes(hist[i], c.data, i * 2);

 		}

 		return c;

 	}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkICCP.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkICCP.java
index db1c1ba64..399577d72 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkICCP.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkICCP.java
@@ -1,31 +1,32 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

+import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * iCCP chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11iCCP

  */

-public class PngChunkICCP extends PngChunk {

+public class PngChunkICCP extends PngChunkSingle {

+	public final static String ID = ChunkHelper.iCCP;

+

 	// http://www.w3.org/TR/PNG/#11iCCP

 	private String profileName;

 	private byte[] compressedProfile; // copmression/decopmresion is done in getter/setter

 

 	public PngChunkICCP(ImageInfo info) {

-		super(ChunkHelper.iCCP, info);

-	}

-

-	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforePLTE() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = createEmptyChunk(profileName.length() + compressedProfile.length + 2, true);

 		System.arraycopy(ChunkHelper.toBytes(profileName), 0, c.data, 0, profileName.length());

 		c.data[profileName.length()] = 0;

@@ -35,12 +36,12 @@ public class PngChunkICCP extends PngChunk {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw chunk) {

+	public void parseFromRaw(ChunkRaw chunk) {

 		int pos0 = ChunkHelper.posNullByte(chunk.data);

-		profileName = new String(chunk.data, 0, pos0, PngHelper.charsetLatin1);

+		profileName = new String(chunk.data, 0, pos0, PngHelperInternal.charsetLatin1);

 		int comp = (chunk.data[pos0 + 1] & 0xff);

 		if (comp != 0)

-			throw new RuntimeException("bad compression for ChunkTypeICCP");

+			throw new PngjException("bad compression for ChunkTypeICCP");

 		int compdatasize = chunk.data.length - (pos0 + 2);

 		compressedProfile = new byte[compdatasize];

 		System.arraycopy(chunk.data, pos0 + 2, compressedProfile, 0, compdatasize);

@@ -64,7 +65,7 @@ public class PngChunkICCP extends PngChunk {
 	}

 

 	public void setProfileNameAndContent(String name, String profile) {

-		setProfileNameAndContent(name, profile.getBytes(PngHelper.charsetLatin1));

+		setProfileNameAndContent(name, profile.getBytes(PngHelperInternal.charsetLatin1));

 	}

 

 	public String getProfileName() {

@@ -79,7 +80,7 @@ public class PngChunkICCP extends PngChunk {
 	}

 

 	public String getProfileAsString() {

-		return new String(getProfile(), PngHelper.charsetLatin1);

+		return new String(getProfile(), PngHelperInternal.charsetLatin1);

 	}

 

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIDAT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIDAT.java
index a7cb95dbf..911513c0d 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIDAT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIDAT.java
@@ -2,21 +2,36 @@ package jogamp.opengl.util.pngj.chunks;
 

 import jogamp.opengl.util.pngj.ImageInfo;

 

-public class PngChunkIDAT extends PngChunk {

+/**

+ * IDAT chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11IDAT

+ * <p>

+ * This is dummy placeholder - we write/read this chunk (actually several) by

+ * special code.

+ */

+public class PngChunkIDAT extends PngChunkMultiple {

+	public final static String ID = ChunkHelper.IDAT;

+

 	// http://www.w3.org/TR/PNG/#11IDAT

-	// This is dummy placeholder - we write/read this chunk (actually several)

-	// by special code.

-	public PngChunkIDAT(ImageInfo i) {

-		super(ChunkHelper.IDAT, i);

+	public PngChunkIDAT(ImageInfo i, int len, long offset) {

+		super(ID, i);

+		this.length = len;

+		this.offset = offset;

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NA;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {// does nothing

+	public ChunkRaw createRawChunk() {// does nothing

 		return null;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) { // does nothing

+	public void parseFromRaw(ChunkRaw c) { // does nothing

 	}

 

 	@Override

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIEND.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIEND.java
index 0d5b266da..fbec564d8 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIEND.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIEND.java
@@ -2,21 +2,33 @@ package jogamp.opengl.util.pngj.chunks;
 

 import jogamp.opengl.util.pngj.ImageInfo;

 

-public class PngChunkIEND extends PngChunk {

+/**

+ * IEND chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11IEND

+ */

+public class PngChunkIEND extends PngChunkSingle {

+	public final static String ID = ChunkHelper.IEND;

+

 	// http://www.w3.org/TR/PNG/#11IEND

 	// this is a dummy placeholder

 	public PngChunkIEND(ImageInfo info) {

-		super(ChunkHelper.IEND, info);

+		super(ID, info);

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NA;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = new ChunkRaw(0, ChunkHelper.b_IEND, false);

 		return c;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		// this is not used

 	}

 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java
index fcb4150ff..94bfedd38 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIHDR.java
@@ -3,14 +3,20 @@ package jogamp.opengl.util.pngj.chunks;
 import java.io.ByteArrayInputStream;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

 

 /**

- * this is a special chunk!

+ * IHDR chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11IHDR

+ * <p>

+ * This is a special critical Chunk.

  */

-public class PngChunkIHDR extends PngChunk {

+public class PngChunkIHDR extends PngChunkSingle {

+	public final static String ID = ChunkHelper.IHDR;

+

 	private int cols;

 	private int rows;

 	private int bitspc;

@@ -22,16 +28,21 @@ public class PngChunkIHDR extends PngChunk {
 	// http://www.w3.org/TR/PNG/#11IHDR

 	//

 	public PngChunkIHDR(ImageInfo info) {

-		super(ChunkHelper.IHDR, info);

+		super(ID, info);

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NA;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = new ChunkRaw(13, ChunkHelper.b_IHDR, true);

 		int offset = 0;

-		PngHelper.writeInt4tobytes(cols, c.data, offset);

+		PngHelperInternal.writeInt4tobytes(cols, c.data, offset);

 		offset += 4;

-		PngHelper.writeInt4tobytes(rows, c.data, offset);

+		PngHelperInternal.writeInt4tobytes(rows, c.data, offset);

 		offset += 4;

 		c.data[offset++] = (byte) bitspc;

 		c.data[offset++] = (byte) colormodel;

@@ -42,18 +53,18 @@ public class PngChunkIHDR extends PngChunk {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		if (c.len != 13)

 			throw new PngjException("Bad IDHR len " + c.len);

 		ByteArrayInputStream st = c.getAsByteStream();

-		cols = PngHelper.readInt4(st);

-		rows = PngHelper.readInt4(st);

+		cols = PngHelperInternal.readInt4(st);

+		rows = PngHelperInternal.readInt4(st);

 		// bit depth: number of bits per channel

-		bitspc = PngHelper.readByte(st);

-		colormodel = PngHelper.readByte(st);

-		compmeth = PngHelper.readByte(st);

-		filmeth = PngHelper.readByte(st);

-		interlaced = PngHelper.readByte(st);

+		bitspc = PngHelperInternal.readByte(st);

+		colormodel = PngHelperInternal.readByte(st);

+		compmeth = PngHelperInternal.readByte(st);

+		filmeth = PngHelperInternal.readByte(st);

+		interlaced = PngHelperInternal.readByte(st);

 	}

 

 	@Override

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java
index 4e5c7c74a..ab52d7c90 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkITXT.java
@@ -4,14 +4,17 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

 

 /**

- * UNTESTED!

+ * iTXt chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11iTXt

  */

 public class PngChunkITXT extends PngChunkTextVar {

+	public final static String ID = ChunkHelper.iTXt;

 

 	private boolean compressed = false;

 	private String langTag = "";

@@ -19,24 +22,24 @@ public class PngChunkITXT extends PngChunkTextVar {
 

 	// http://www.w3.org/TR/PNG/#11iTXt

 	public PngChunkITXT(ImageInfo info) {

-		super(ChunkHelper.iTXt, info);

+		super(ID, info);

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

-		if (val.isEmpty() || key.isEmpty())

-			return null;

+	public ChunkRaw createRawChunk() {

+		if (key.isEmpty())

+			throw new PngjException("Text chunk key must be non empty");

 		try {

 			ByteArrayOutputStream ba = new ByteArrayOutputStream();

-			ba.write(key.getBytes(PngHelper.charsetLatin1));

+			ba.write(ChunkHelper.toBytes(key));

 			ba.write(0); // separator

 			ba.write(compressed ? 1 : 0);

 			ba.write(0); // compression method (always 0)

-			ba.write(langTag.getBytes(PngHelper.charsetUTF8));

+			ba.write(ChunkHelper.toBytes(langTag));

 			ba.write(0); // separator

-			ba.write(translatedTag.getBytes(PngHelper.charsetUTF8));

+			ba.write(ChunkHelper.toBytesUTF8(translatedTag));

 			ba.write(0); // separator

-			byte[] textbytes = val.getBytes(PngHelper.charsetUTF8);

+			byte[] textbytes = ChunkHelper.toBytesUTF8(val);

 			if (compressed) {

 				textbytes = ChunkHelper.compressBytes(textbytes, true);

 			}

@@ -51,7 +54,7 @@ public class PngChunkITXT extends PngChunkTextVar {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		int nullsFound = 0;

 		int[] nullsIdx = new int[3];

 		for (int i = 0; i < c.data.length; i++) {

@@ -66,20 +69,21 @@ public class PngChunkITXT extends PngChunkTextVar {
 		}

 		if (nullsFound != 3)

 			throw new PngjException("Bad formed PngChunkITXT chunk");

-		key = new String(c.data, 0, nullsIdx[0], PngHelper.charsetLatin1);

+		key = ChunkHelper.toString(c.data, 0, nullsIdx[0]);

 		int i = nullsIdx[0] + 1;

 		compressed = c.data[i] == 0 ? false : true;

 		i++;

 		if (compressed && c.data[i] != 0)

 			throw new PngjException("Bad formed PngChunkITXT chunk - bad compression method ");

-		langTag = new String(c.data, i, nullsIdx[1] - i, PngHelper.charsetLatin1);

-		translatedTag = new String(c.data, nullsIdx[1] + 1, nullsIdx[2] - nullsIdx[1] - 1, PngHelper.charsetUTF8);

+		langTag = new String(c.data, i, nullsIdx[1] - i, PngHelperInternal.charsetLatin1);

+		translatedTag = new String(c.data, nullsIdx[1] + 1, nullsIdx[2] - nullsIdx[1] - 1,

+				PngHelperInternal.charsetUTF8);

 		i = nullsIdx[2] + 1;

 		if (compressed) {

 			byte[] bytes = ChunkHelper.compressBytes(c.data, i, c.data.length - i, false);

-			val = new String(bytes, PngHelper.charsetUTF8);

+			val = ChunkHelper.toStringUTF8(bytes);

 		} else {

-			val = new String(c.data, i, c.data.length - i, PngHelper.charsetUTF8);

+			val = ChunkHelper.toStringUTF8(c.data, i, c.data.length - i);

 		}

 	}

 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java
new file mode 100644
index 000000000..057f6c25e
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java
@@ -0,0 +1,28 @@
+package jogamp.opengl.util.pngj.chunks;

+

+import jogamp.opengl.util.pngj.ImageInfo;

+

+/**

+ * PNG chunk type (abstract) that allows multiple instances in same image.

+ */

+public abstract class PngChunkMultiple extends PngChunk {

+

+	protected PngChunkMultiple(String id, ImageInfo imgInfo) {

+		super(id, imgInfo);

+	}

+

+	@Override

+	public final boolean allowsMultiple() {

+		return true;

+	}

+

+	/**

+	 * NOTE: this chunk uses the default Object's equals() hashCode()

+	 * implementation.

+	 *

+	 * This is the right thing to do, normally.

+	 *

+	 * This is important, eg see ChunkList.removeFromList()

+	 */

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkOFFS.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkOFFS.java
new file mode 100644
index 000000000..a3bab4995
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkOFFS.java
@@ -0,0 +1,89 @@
+package jogamp.opengl.util.pngj.chunks;

+

+import jogamp.opengl.util.pngj.ImageInfo;

+import jogamp.opengl.util.pngj.PngHelperInternal;

+import jogamp.opengl.util.pngj.PngjException;

+

+/**

+ * oFFs chunk.

+ * <p>

+ * see http://www.libpng.org/pub/png/spec/register/pngext-1.3.0-pdg.html#C.oFFs

+ */

+public class PngChunkOFFS extends PngChunkSingle {

+	public final static String ID = "oFFs";

+

+	// http://www.libpng.org/pub/png/spec/register/pngext-1.3.0-pdg.html#C.oFFs

+	private long posX;

+	private long posY;

+	private int units; // 0: pixel 1:micrometer

+

+	public PngChunkOFFS(ImageInfo info) {

+		super(ID, info);

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_IDAT;

+	}

+

+	@Override

+	public ChunkRaw createRawChunk() {

+		ChunkRaw c = createEmptyChunk(9, true);

+		PngHelperInternal.writeInt4tobytes((int) posX, c.data, 0);

+		PngHelperInternal.writeInt4tobytes((int) posY, c.data, 4);

+		c.data[8] = (byte) units;

+		return c;

+	}

+

+	@Override

+	public void parseFromRaw(ChunkRaw chunk) {

+		if (chunk.len != 9)

+			throw new PngjException("bad chunk length " + chunk);

+		posX = PngHelperInternal.readInt4fromBytes(chunk.data, 0);

+		if (posX < 0)

+			posX += 0x100000000L;

+		posY = PngHelperInternal.readInt4fromBytes(chunk.data, 4);

+		if (posY < 0)

+			posY += 0x100000000L;

+		units = PngHelperInternal.readInt1fromByte(chunk.data, 8);

+	}

+

+	@Override

+	public void cloneDataFromRead(PngChunk other) {

+		PngChunkOFFS otherx = (PngChunkOFFS) other;

+		this.posX = otherx.posX;

+		this.posY = otherx.posY;

+		this.units = otherx.units;

+	}

+

+	/**

+	 * 0: pixel, 1:micrometer

+	 */

+	public int getUnits() {

+		return units;

+	}

+

+	/**

+	 * 0: pixel, 1:micrometer

+	 */

+	public void setUnits(int units) {

+		this.units = units;

+	}

+

+	public long getPosX() {

+		return posX;

+	}

+

+	public void setPosX(long posX) {

+		this.posX = posX;

+	}

+

+	public long getPosY() {

+		return posY;

+	}

+

+	public void setPosY(long posY) {

+		this.posY = posY;

+	}

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java
index 47e2c492c..b0a1bb898 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPHYS.java
@@ -1,44 +1,50 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

+/**

+ * pHYs chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11pHYs

+ */

+public class PngChunkPHYS extends PngChunkSingle {

+	public final static String ID = ChunkHelper.pHYs;

 

-public class PngChunkPHYS extends PngChunk {

 	// http://www.w3.org/TR/PNG/#11pHYs

 	private long pixelsxUnitX;

 	private long pixelsxUnitY;

 	private int units; // 0: unknown 1:metre

 

 	public PngChunkPHYS(ImageInfo info) {

-		super(ChunkHelper.pHYs, info);

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_IDAT;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = createEmptyChunk(9, true);

-		PngHelper.writeInt4tobytes((int) pixelsxUnitX, c.data, 0);

-		PngHelper.writeInt4tobytes((int) pixelsxUnitY, c.data, 4);

+		PngHelperInternal.writeInt4tobytes((int) pixelsxUnitX, c.data, 0);

+		PngHelperInternal.writeInt4tobytes((int) pixelsxUnitY, c.data, 4);

 		c.data[8] = (byte) units;

 		return c;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw chunk) {

+	public void parseFromRaw(ChunkRaw chunk) {

 		if (chunk.len != 9)

 			throw new PngjException("bad chunk length " + chunk);

-		pixelsxUnitX = PngHelper.readInt4fromBytes(chunk.data, 0);

+		pixelsxUnitX = PngHelperInternal.readInt4fromBytes(chunk.data, 0);

 		if (pixelsxUnitX < 0)

 			pixelsxUnitX += 0x100000000L;

-		pixelsxUnitY = PngHelper.readInt4fromBytes(chunk.data, 4);

+		pixelsxUnitY = PngHelperInternal.readInt4fromBytes(chunk.data, 4);

 		if (pixelsxUnitY < 0)

 			pixelsxUnitY += 0x100000000L;

-		units = PngHelper.readInt1fromByte(chunk.data, 8);

+		units = PngHelperInternal.readInt1fromByte(chunk.data, 8);

 	}

 

 	@Override

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPLTE.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPLTE.java
index 123080bb3..dbf5e53c0 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPLTE.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkPLTE.java
@@ -3,10 +3,16 @@ package jogamp.opengl.util.pngj.chunks;
 import jogamp.opengl.util.pngj.ImageInfo;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

- * Palette chunk *this is critical*

+/**

+ * PLTE chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11PLTE

+ * <p>

+ * Critical chunk

  */

-public class PngChunkPLTE extends PngChunk {

+public class PngChunkPLTE extends PngChunkSingle {

+	public final static String ID = ChunkHelper.PLTE;

+

 	// http://www.w3.org/TR/PNG/#11PLTE

 	private int nentries = 0;

 	/**

@@ -15,11 +21,16 @@ public class PngChunkPLTE extends PngChunk {
 	private int[] entries;

 

 	public PngChunkPLTE(ImageInfo info) {

-		super(ChunkHelper.PLTE, info);

+		super(ID, info);

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NA;

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		int len = 3 * nentries;

 		int[] rgb = new int[3];

 		ChunkRaw c = createEmptyChunk(len, true);

@@ -33,7 +44,7 @@ public class PngChunkPLTE extends PngChunk {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw chunk) {

+	public void parseFromRaw(ChunkRaw chunk) {

 		setNentries(chunk.len / 3);

 		for (int n = 0, i = 0; n < nentries; n++) {

 			setEntry(n, (int) (chunk.data[i++] & 0xff), (int) (chunk.data[i++] & 0xff), (int) (chunk.data[i++] & 0xff));

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSBIT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSBIT.java
index 6850d260d..3a490654a 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSBIT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSBIT.java
@@ -1,31 +1,31 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * sBIT chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11sBIT

+ * <p>

+ * this chunk structure depends on the image type

  */

-public class PngChunkSBIT extends PngChunk {

+public class PngChunkSBIT extends PngChunkSingle {

+	public final static String ID = ChunkHelper.sBIT;

 	// http://www.w3.org/TR/PNG/#11sBIT

-	// this chunk structure depends on the image type

 

 	// significant bits

 	private int graysb, alphasb;

 	private int redsb, greensb, bluesb;

 

 	public PngChunkSBIT(ImageInfo info) {

-		super(ChunkHelper.sBIT, info);

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

-	}

-

-	@Override

-	public boolean mustGoBeforePLTE() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;

 	}

 

 	private int getLen() {

@@ -36,24 +36,24 @@ public class PngChunkSBIT extends PngChunk {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		if (c.len != getLen())

 			throw new PngjException("bad chunk length " + c);

 		if (imgInfo.greyscale) {

-			graysb = PngHelper.readInt1fromByte(c.data, 0);

+			graysb = PngHelperInternal.readInt1fromByte(c.data, 0);

 			if (imgInfo.alpha)

-				alphasb = PngHelper.readInt1fromByte(c.data, 1);

+				alphasb = PngHelperInternal.readInt1fromByte(c.data, 1);

 		} else {

-			redsb = PngHelper.readInt1fromByte(c.data, 0);

-			greensb = PngHelper.readInt1fromByte(c.data, 1);

-			bluesb = PngHelper.readInt1fromByte(c.data, 2);

+			redsb = PngHelperInternal.readInt1fromByte(c.data, 0);

+			greensb = PngHelperInternal.readInt1fromByte(c.data, 1);

+			bluesb = PngHelperInternal.readInt1fromByte(c.data, 2);

 			if (imgInfo.alpha)

-				alphasb = PngHelper.readInt1fromByte(c.data, 3);

+				alphasb = PngHelperInternal.readInt1fromByte(c.data, 3);

 		}

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = null;

 		c = createEmptyChunk(getLen(), true);

 		if (imgInfo.greyscale) {

@@ -106,7 +106,7 @@ public class PngChunkSBIT extends PngChunk {
 

 	/**

 	 * Set rgb values

-	 * 

+	 *

 	 */

 	public void setRGB(int r, int g, int b) {

 		if (imgInfo.greyscale || imgInfo.indexed)

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSPLT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSPLT.java
index 953adb7d9..2ff65834d 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSPLT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSPLT.java
@@ -4,11 +4,17 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 
 import jogamp.opengl.util.pngj.ImageInfo;
-import jogamp.opengl.util.pngj.PngHelper;
+import jogamp.opengl.util.pngj.PngHelperInternal;
 import jogamp.opengl.util.pngj.PngjException;
 
+/**
+ * sPLT chunk.
+ * <p>
+ * see http://www.w3.org/TR/PNG/#11sPLT
+ */
+public class PngChunkSPLT extends PngChunkMultiple {
+	public final static String ID = ChunkHelper.sPLT;
 
-public class PngChunkSPLT extends PngChunk {
 	// http://www.w3.org/TR/PNG/#11sPLT
 
 	private String palName;
@@ -16,35 +22,30 @@ public class PngChunkSPLT extends PngChunk {
 	private int[] palette; // 5 elements per entry
 
 	public PngChunkSPLT(ImageInfo info) {
-		super(ChunkHelper.sPLT, info);
+		super(ID, info);
 	}
 
 	@Override
-	public boolean allowsMultiple() {
-		return true; // allows multiple, but pallete name should be different
+	public ChunkOrderingConstraint getOrderingConstraint() {
+		return ChunkOrderingConstraint.BEFORE_IDAT;
 	}
 
 	@Override
-	public boolean mustGoBeforeIDAT() {
-		return true;
-	}
-
-	@Override
-	public ChunkRaw createChunk() {
+	public ChunkRaw createRawChunk() {
 		try {
 			ByteArrayOutputStream ba = new ByteArrayOutputStream();
-			ba.write(palName.getBytes(PngHelper.charsetLatin1));
+			ba.write(palName.getBytes(PngHelperInternal.charsetLatin1));
 			ba.write(0); // separator
 			ba.write((byte) sampledepth);
 			int nentries = getNentries();
 			for (int n = 0; n < nentries; n++) {
 				for (int i = 0; i < 4; i++) {
 					if (sampledepth == 8)
-						PngHelper.writeByte(ba, (byte) palette[n * 5 + i]);
+						PngHelperInternal.writeByte(ba, (byte) palette[n * 5 + i]);
 					else
-						PngHelper.writeInt2(ba, palette[n * 5 + i]);
+						PngHelperInternal.writeInt2(ba, palette[n * 5 + i]);
 				}
-				PngHelper.writeInt2(ba, palette[n * 5 + 4]);
+				PngHelperInternal.writeInt2(ba, palette[n * 5 + 4]);
 			}
 			byte[] b = ba.toByteArray();
 			ChunkRaw chunk = createEmptyChunk(b.length, false);
@@ -56,7 +57,7 @@ public class PngChunkSPLT extends PngChunk {
 	}
 
 	@Override
-	public void parseFromChunk(ChunkRaw c) {
+	public void parseFromRaw(ChunkRaw c) {
 		int t = -1;
 		for (int i = 0; i < c.data.length; i++) { // look for first zero
 			if (c.data[i] == 0) {
@@ -66,8 +67,8 @@ public class PngChunkSPLT extends PngChunk {
 		}
 		if (t <= 0 || t > c.data.length - 2)
 			throw new PngjException("bad sPLT chunk: no separator found");
-		palName = new String(c.data, 0, t, PngHelper.charsetLatin1);
-		sampledepth = PngHelper.readInt1fromByte(c.data, t + 1);
+		palName = new String(c.data, 0, t, PngHelperInternal.charsetLatin1);
+		sampledepth = PngHelperInternal.readInt1fromByte(c.data, t + 1);
 		t += 2;
 		int nentries = (c.data.length - t) / (sampledepth == 8 ? 6 : 10);
 		palette = new int[nentries * 5];
@@ -75,21 +76,21 @@ public class PngChunkSPLT extends PngChunk {
 		ne = 0;
 		for (int i = 0; i < nentries; i++) {
 			if (sampledepth == 8) {
-				r = PngHelper.readInt1fromByte(c.data, t++);
-				g = PngHelper.readInt1fromByte(c.data, t++);
-				b = PngHelper.readInt1fromByte(c.data, t++);
-				a = PngHelper.readInt1fromByte(c.data, t++);
+				r = PngHelperInternal.readInt1fromByte(c.data, t++);
+				g = PngHelperInternal.readInt1fromByte(c.data, t++);
+				b = PngHelperInternal.readInt1fromByte(c.data, t++);
+				a = PngHelperInternal.readInt1fromByte(c.data, t++);
 			} else {
-				r = PngHelper.readInt2fromBytes(c.data, t);
+				r = PngHelperInternal.readInt2fromBytes(c.data, t);
 				t += 2;
-				g = PngHelper.readInt2fromBytes(c.data, t);
+				g = PngHelperInternal.readInt2fromBytes(c.data, t);
 				t += 2;
-				b = PngHelper.readInt2fromBytes(c.data, t);
+				b = PngHelperInternal.readInt2fromBytes(c.data, t);
 				t += 2;
-				a = PngHelper.readInt2fromBytes(c.data, t);
+				a = PngHelperInternal.readInt2fromBytes(c.data, t);
 				t += 2;
 			}
-			f = PngHelper.readInt2fromBytes(c.data, t);
+			f = PngHelperInternal.readInt2fromBytes(c.data, t);
 			t += 2;
 			palette[ne++] = r;
 			palette[ne++] = g;
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSRGB.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSRGB.java
index 774558785..e4d77d40a 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSRGB.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSRGB.java
@@ -1,12 +1,17 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-/*

+/**

+ * sRGB chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11sRGB

  */

-public class PngChunkSRGB extends PngChunk {

+public class PngChunkSRGB extends PngChunkSingle {

+	public final static String ID = ChunkHelper.sRGB;

+

 	// http://www.w3.org/TR/PNG/#11sRGB

 

 	public static final int RENDER_INTENT_Perceptual = 0;

@@ -17,28 +22,23 @@ public class PngChunkSRGB extends PngChunk {
 	private int intent;

 

 	public PngChunkSRGB(ImageInfo info) {

-		super(ChunkHelper.sRGB, info);

-	}

-

-	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

+		super(ID, info);

 	}

 

 	@Override

-	public boolean mustGoBeforePLTE() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_PLTE_AND_IDAT;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		if (c.len != 1)

 			throw new PngjException("bad chunk length " + c);

-		intent = PngHelper.readInt1fromByte(c.data, 0);

+		intent = PngHelperInternal.readInt1fromByte(c.data, 0);

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = null;

 		c = createEmptyChunk(1, true);

 		c.data[0] = (byte) intent;

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSTER.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSTER.java
new file mode 100644
index 000000000..4dc5edec5
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSTER.java
@@ -0,0 +1,60 @@
+package jogamp.opengl.util.pngj.chunks;

+

+import jogamp.opengl.util.pngj.ImageInfo;

+import jogamp.opengl.util.pngj.PngjException;

+

+/**

+ * sTER chunk.

+ * <p>

+ * see http://www.libpng.org/pub/png/spec/register/pngext-1.3.0-pdg.html#C.sTER

+ */

+public class PngChunkSTER extends PngChunkSingle {

+	public final static String ID = "sTER";

+

+	// http://www.libpng.org/pub/png/spec/register/pngext-1.3.0-pdg.html#C.sTER

+	private byte mode; // 0: cross-fuse layout 1: diverging-fuse layout

+

+	public PngChunkSTER(ImageInfo info) {

+		super(ID, info);

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.BEFORE_IDAT;

+	}

+

+	@Override

+	public ChunkRaw createRawChunk() {

+		ChunkRaw c = createEmptyChunk(1, true);

+		c.data[0] = (byte) mode;

+		return c;

+	}

+

+	@Override

+	public void parseFromRaw(ChunkRaw chunk) {

+		if (chunk.len != 1)

+			throw new PngjException("bad chunk length " + chunk);

+		mode = chunk.data[0];

+	}

+

+	@Override

+	public void cloneDataFromRead(PngChunk other) {

+		PngChunkSTER otherx = (PngChunkSTER) other;

+		this.mode = otherx.mode;

+	}

+

+	/**

+	 * 0: cross-fuse layout 1: diverging-fuse layout

+	 */

+	public byte getMode() {

+		return mode;

+	}

+

+	/**

+	 * 0: cross-fuse layout 1: diverging-fuse layout

+	 */

+	public void setMode(byte mode) {

+		this.mode = mode;

+	}

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
new file mode 100644
index 000000000..7df5ba021
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
@@ -0,0 +1,45 @@
+package jogamp.opengl.util.pngj.chunks;

+

+import jogamp.opengl.util.pngj.ImageInfo;

+

+/**

+ * PNG chunk type (abstract) that does not allow multiple instances in same

+ * image.

+ */

+public abstract class PngChunkSingle extends PngChunk {

+

+	protected PngChunkSingle(String id, ImageInfo imgInfo) {

+		super(id, imgInfo);

+	}

+

+	@Override

+	public final boolean allowsMultiple() {

+		return false;

+	}

+

+	@Override

+	public int hashCode() {

+		final int prime = 31;

+		int result = 1;

+		result = prime * result + ((id == null) ? 0 : id.hashCode());

+		return result;

+	}

+

+	@Override

+	public boolean equals(Object obj) {

+		if (this == obj)

+			return true;

+		if (obj == null)

+			return false;

+		if (getClass() != obj.getClass())

+			return false;

+		PngChunkSingle other = (PngChunkSingle) obj;

+		if (id == null) {

+			if (other.id != null)

+				return false;

+		} else if (!id.equals(other.id))

+			return false;

+		return true;

+	}

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSkipped.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSkipped.java
new file mode 100644
index 000000000..f4c77b4e1
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSkipped.java
@@ -0,0 +1,41 @@
+package jogamp.opengl.util.pngj.chunks;

+

+import jogamp.opengl.util.pngj.ImageInfo;

+import jogamp.opengl.util.pngj.PngjException;

+

+/**

+ * Pseudo chunk type, for chunks that were skipped on reading

+ */

+public class PngChunkSkipped extends PngChunk {

+

+	public PngChunkSkipped(String id, ImageInfo info, int clen) {

+		super(id, info);

+		this.length = clen;

+	}

+

+	@Override

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NONE;

+	}

+

+	@Override

+	public ChunkRaw createRawChunk() {

+		throw new PngjException("Non supported for a skipped chunk");

+	}

+

+	@Override

+	public void parseFromRaw(ChunkRaw c) {

+		throw new PngjException("Non supported for a skipped chunk");

+	}

+

+	@Override

+	public void cloneDataFromRead(PngChunk other) {

+		throw new PngjException("Non supported for a skipped chunk");

+	}

+

+	@Override

+	public boolean allowsMultiple() {

+		return true;

+	}

+

+}

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTEXT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTEXT.java
index c535fe34a..d97cd63c5 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTEXT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTEXT.java
@@ -1,28 +1,40 @@
 package jogamp.opengl.util.pngj.chunks;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

+import jogamp.opengl.util.pngj.PngjException;

 

+/**

+ * tEXt chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11tEXt

+ */

 public class PngChunkTEXT extends PngChunkTextVar {

+	public final static String ID = ChunkHelper.tEXt;

+

 	public PngChunkTEXT(ImageInfo info) {

-		super(ChunkHelper.tEXt, info);

+		super(ID, info);

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

-		if (val.isEmpty() || key.isEmpty())

-			return null;

-		byte[] b = (key + "\0" + val).getBytes(PngHelper.charsetLatin1);

+	public ChunkRaw createRawChunk() {

+		if (key.isEmpty())

+			throw new PngjException("Text chunk key must be non empty");

+		byte[] b = (key + "\0" + val).getBytes(PngHelperInternal.charsetLatin1);

 		ChunkRaw chunk = createEmptyChunk(b.length, false);

 		chunk.data = b;

 		return chunk;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

-		String[] k = (new String(c.data, PngHelper.charsetLatin1)).split("\0");

-		key = k[0];

-		val = k[1];

+	public void parseFromRaw(ChunkRaw c) {

+		int i;

+		for (i = 0; i < c.data.length; i++)

+			if (c.data[i] == 0)

+				break;

+		key = new String(c.data, 0, i, PngHelperInternal.charsetLatin1);

+		i++;

+		val = i < c.data.length ? new String(c.data, i, c.data.length - i, PngHelperInternal.charsetLatin1) : "";

 	}

 

 	@Override

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTIME.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTIME.java
index 37e617acb..8f34c78fe 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTIME.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTIME.java
@@ -3,22 +3,33 @@ package jogamp.opengl.util.pngj.chunks;
 import java.util.Calendar;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

+/**

+ * tIME chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11tIME

+ */

+public class PngChunkTIME extends PngChunkSingle {

+	public final static String ID = ChunkHelper.tIME;

 

-public class PngChunkTIME extends PngChunk {

 	// http://www.w3.org/TR/PNG/#11tIME

 	private int year, mon, day, hour, min, sec;

 

 	public PngChunkTIME(ImageInfo info) {

-		super(ChunkHelper.tIME, info);

+		super(ID, info);

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NONE;

+	}

+

+	@Override

+	public ChunkRaw createRawChunk() {

 		ChunkRaw c = createEmptyChunk(7, true);

-		PngHelper.writeInt2tobytes(year, c.data, 0);

+		PngHelperInternal.writeInt2tobytes(year, c.data, 0);

 		c.data[2] = (byte) mon;

 		c.data[3] = (byte) day;

 		c.data[4] = (byte) hour;

@@ -28,15 +39,15 @@ public class PngChunkTIME extends PngChunk {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw chunk) {

+	public void parseFromRaw(ChunkRaw chunk) {

 		if (chunk.len != 7)

 			throw new PngjException("bad chunk " + chunk);

-		year = PngHelper.readInt2fromBytes(chunk.data, 0);

-		mon = PngHelper.readInt1fromByte(chunk.data, 2);

-		day = PngHelper.readInt1fromByte(chunk.data, 3);

-		hour = PngHelper.readInt1fromByte(chunk.data, 4);

-		min = PngHelper.readInt1fromByte(chunk.data, 5);

-		sec = PngHelper.readInt1fromByte(chunk.data, 6);

+		year = PngHelperInternal.readInt2fromBytes(chunk.data, 0);

+		mon = PngHelperInternal.readInt1fromByte(chunk.data, 2);

+		day = PngHelperInternal.readInt1fromByte(chunk.data, 3);

+		hour = PngHelperInternal.readInt1fromByte(chunk.data, 4);

+		min = PngHelperInternal.readInt1fromByte(chunk.data, 5);

+		sec = PngHelperInternal.readInt1fromByte(chunk.data, 6);

 	}

 

 	@Override

@@ -69,15 +80,14 @@ public class PngChunkTIME extends PngChunk {
 		min = minx;

 		sec = secx;

 	}

+

 	public int[] getYMDHMS() {

 		return new int[] { year, mon, day, hour, min, sec };

 	}

 

 	/** format YYYY/MM/DD HH:mm:SS */

 	public String getAsString() {

-		return String.format("%04/%02d/%02d %02d:%02d:%02d", year, mon, day, hour, min, sec);

+		return String.format("%04d/%02d/%02d %02d:%02d:%02d", year, mon, day, hour, min, sec);

 	}

 

-	

-

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTRNS.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTRNS.java
index 9365e5e8e..867e34861 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTRNS.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTRNS.java
@@ -1,129 +1,141 @@
-package jogamp.opengl.util.pngj.chunks;

-

-import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

-import jogamp.opengl.util.pngj.PngjException;

-

-/*

- */

-public class PngChunkTRNS extends PngChunk {

-	// http://www.w3.org/TR/PNG/#11tRNS

-	// this chunk structure depends on the image type

-	// only one of these is meaningful

-	private int gray;

-	private int red, green, blue;

-	private int[] paletteAlpha = new int[] {};

-

-	public PngChunkTRNS(ImageInfo info) {

-		super(ChunkHelper.tRNS, info);

-	}

-

-	@Override

-	public boolean mustGoBeforeIDAT() {

-		return true;

-	}

-

-	@Override

-	public boolean mustGoAfterPLTE() {

-		return true;

-	}

-

-	@Override

-	public ChunkRaw createChunk() {

-		ChunkRaw c = null;

-		if (imgInfo.greyscale) {

-			c = createEmptyChunk(2, true);

-			PngHelper.writeInt2tobytes(gray, c.data, 0);

-		} else if (imgInfo.indexed) {

-			c = createEmptyChunk(paletteAlpha.length, true);

-			for (int n = 0; n < c.len; n++) {

-				c.data[n] = (byte) paletteAlpha[n];

-			}

-		} else {

-			c = createEmptyChunk(6, true);

-			PngHelper.writeInt2tobytes(red, c.data, 0);

-			PngHelper.writeInt2tobytes(green, c.data, 0);

-			PngHelper.writeInt2tobytes(blue, c.data, 0);

-		}

-		return c;

-	}

-

-	@Override

-	public void parseFromChunk(ChunkRaw c) {

-		if (imgInfo.greyscale) {

-			gray = PngHelper.readInt2fromBytes(c.data, 0);

-		} else if (imgInfo.indexed) {

-			int nentries = c.data.length;

-			paletteAlpha = new int[nentries];

-			for (int n = 0; n < nentries; n++) {

-				paletteAlpha[n] = (int) (c.data[n] & 0xff);

-			}

-		} else {

-			red = PngHelper.readInt2fromBytes(c.data, 0);

-			green = PngHelper.readInt2fromBytes(c.data, 2);

-			blue = PngHelper.readInt2fromBytes(c.data, 4);

-		}

-	}

-

-	@Override

-	public void cloneDataFromRead(PngChunk other) {

-		PngChunkTRNS otherx = (PngChunkTRNS) other;

-		gray = otherx.gray;

-		red = otherx.red;

-		green = otherx.red;

-		blue = otherx.red;

-		if (otherx.paletteAlpha != null) {

-			paletteAlpha = new int[otherx.paletteAlpha.length];

-			System.arraycopy(otherx.paletteAlpha, 0, paletteAlpha, 0, paletteAlpha.length);

-		}

-	}

-

-	/**

-	 * Set rgb values

-	 * 

-	 */

-	public void setRGB(int r, int g, int b) {

-		if (imgInfo.greyscale || imgInfo.indexed)

-			throw new PngjException("only rgb or rgba images support this");

-		red = r;

-		green = g;

-		blue = b;

-	}

-

-	public int[] getRGB() {

-		if (imgInfo.greyscale || imgInfo.indexed)

-			throw new PngjException("only rgb or rgba images support this");

-		return new int[] { red, green, blue };

-	}

-

-	public void setGray(int g) {

-		if (!imgInfo.greyscale)

-			throw new PngjException("only grayscale images support this");

-		gray = g;

-	}

-

-	public int getGray() {

-		if (!imgInfo.greyscale)

-			throw new PngjException("only grayscale images support this");

-		return gray;

-	}

-

-	/**

-	 * WARNING: non deep copy

-	 */

-	public void setPalletteAlpha(int[] palAlpha) {

-		if (!imgInfo.indexed)

-			throw new PngjException("only indexed images support this");

-		paletteAlpha = palAlpha;

-	}

-

-	/**

-	 * WARNING: non deep copy

-	 */

-	public int[] getPalletteAlpha() {

-		if (!imgInfo.indexed)

-			throw new PngjException("only indexed images support this");

-		return paletteAlpha;

-	}

-

-}

+package jogamp.opengl.util.pngj.chunks;
+
+import jogamp.opengl.util.pngj.ImageInfo;
+import jogamp.opengl.util.pngj.PngHelperInternal;
+import jogamp.opengl.util.pngj.PngjException;
+
+/**
+ * tRNS chunk.
+ * <p>
+ * see http://www.w3.org/TR/PNG/#11tRNS
+ * <p>
+ * this chunk structure depends on the image type
+ */
+public class PngChunkTRNS extends PngChunkSingle {
+	public final static String ID = ChunkHelper.tRNS;
+
+	// http://www.w3.org/TR/PNG/#11tRNS
+
+	// only one of these is meaningful, depending on the image type
+	private int gray;
+	private int red, green, blue;
+	private int[] paletteAlpha = new int[] {};
+
+	public PngChunkTRNS(ImageInfo info) {
+		super(ID, info);
+	}
+
+	@Override
+	public ChunkOrderingConstraint getOrderingConstraint() {
+		return ChunkOrderingConstraint.AFTER_PLTE_BEFORE_IDAT;
+	}
+
+	@Override
+	public ChunkRaw createRawChunk() {
+		ChunkRaw c = null;
+		if (imgInfo.greyscale) {
+			c = createEmptyChunk(2, true);
+			PngHelperInternal.writeInt2tobytes(gray, c.data, 0);
+		} else if (imgInfo.indexed) {
+			c = createEmptyChunk(paletteAlpha.length, true);
+			for (int n = 0; n < c.len; n++) {
+				c.data[n] = (byte) paletteAlpha[n];
+			}
+		} else {
+			c = createEmptyChunk(6, true);
+			PngHelperInternal.writeInt2tobytes(red, c.data, 0);
+			PngHelperInternal.writeInt2tobytes(green, c.data, 0);
+			PngHelperInternal.writeInt2tobytes(blue, c.data, 0);
+		}
+		return c;
+	}
+
+	@Override
+	public void parseFromRaw(ChunkRaw c) {
+		if (imgInfo.greyscale) {
+			gray = PngHelperInternal.readInt2fromBytes(c.data, 0);
+		} else if (imgInfo.indexed) {
+			int nentries = c.data.length;
+			paletteAlpha = new int[nentries];
+			for (int n = 0; n < nentries; n++) {
+				paletteAlpha[n] = (int) (c.data[n] & 0xff);
+			}
+		} else {
+			red = PngHelperInternal.readInt2fromBytes(c.data, 0);
+			green = PngHelperInternal.readInt2fromBytes(c.data, 2);
+			blue = PngHelperInternal.readInt2fromBytes(c.data, 4);
+		}
+	}
+
+	@Override
+	public void cloneDataFromRead(PngChunk other) {
+		PngChunkTRNS otherx = (PngChunkTRNS) other;
+		gray = otherx.gray;
+		red = otherx.red;
+		green = otherx.green;
+		blue = otherx.blue;
+		if (otherx.paletteAlpha != null) {
+			paletteAlpha = new int[otherx.paletteAlpha.length];
+			System.arraycopy(otherx.paletteAlpha, 0, paletteAlpha, 0, paletteAlpha.length);
+		}
+	}
+
+	/**
+	 * Set rgb values
+	 *
+	 */
+	public void setRGB(int r, int g, int b) {
+		if (imgInfo.greyscale || imgInfo.indexed)
+			throw new PngjException("only rgb or rgba images support this");
+		red = r;
+		green = g;
+		blue = b;
+	}
+
+	public int[] getRGB() {
+		if (imgInfo.greyscale || imgInfo.indexed)
+			throw new PngjException("only rgb or rgba images support this");
+		return new int[] { red, green, blue };
+	}
+
+	public void setGray(int g) {
+		if (!imgInfo.greyscale)
+			throw new PngjException("only grayscale images support this");
+		gray = g;
+	}
+
+	public int getGray() {
+		if (!imgInfo.greyscale)
+			throw new PngjException("only grayscale images support this");
+		return gray;
+	}
+
+	/**
+	 * WARNING: non deep copy
+	 */
+	public void setPalletteAlpha(int[] palAlpha) {
+		if (!imgInfo.indexed)
+			throw new PngjException("only indexed images support this");
+		paletteAlpha = palAlpha;
+	}
+
+	/**
+	 * to use when only one pallete index is set as totally transparent
+	 */
+	public void setIndexEntryAsTransparent(int palAlphaIndex) {
+		if (!imgInfo.indexed)
+			throw new PngjException("only indexed images support this");
+		paletteAlpha = new int[] { palAlphaIndex + 1 };
+		for (int i = 0; i < palAlphaIndex; i++)
+			paletteAlpha[i] = 255;
+		paletteAlpha[palAlphaIndex] = 0;
+	}
+
+	/**
+	 * WARNING: non deep copy
+	 */
+	public int[] getPalletteAlpha() {
+		return paletteAlpha;
+	}
+
+}
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTextVar.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTextVar.java
index 3d92a806f..ba3ffc30c 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTextVar.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTextVar.java
@@ -3,11 +3,9 @@ package jogamp.opengl.util.pngj.chunks;
 import jogamp.opengl.util.pngj.ImageInfo;

 

 /**

- * superclass for three textual chunks (TEXT, ITXT, ZTXT)

- * 

- * @author Hernan J Gonzalez

+ * Superclass (abstract) for three textual chunks (TEXT, ITXT, ZTXT)

  */

-public abstract class PngChunkTextVar extends PngChunk {

+public abstract class PngChunkTextVar extends PngChunkMultiple {

 	protected String key; // key/val: only for tEXt. lazy computed

 	protected String val;

 

@@ -28,8 +26,8 @@ public abstract class PngChunkTextVar extends PngChunk {
 	}

 

 	@Override

-	public boolean allowsMultiple() {

-		return true;

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NONE;

 	}

 

 	public static class PngTxtInfo {

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkUNKNOWN.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkUNKNOWN.java
index 15a35935a..3803428e6 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkUNKNOWN.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkUNKNOWN.java
@@ -2,7 +2,12 @@ package jogamp.opengl.util.pngj.chunks;
 

 import jogamp.opengl.util.pngj.ImageInfo;

 

-public class PngChunkUNKNOWN extends PngChunk { // unkown, custom or not

+/**

+ * Placeholder for UNKNOWN (custom or not) chunks.

+ * <p>

+ * For PngReader, a chunk is unknown if it's not registered in the chunk factory

+ */

+public class PngChunkUNKNOWN extends PngChunkMultiple { // unkown, custom or not

 

 	private byte[] data;

 

@@ -10,25 +15,25 @@ public class PngChunkUNKNOWN extends PngChunk { // unkown, custom or not
 		super(id, info);

 	}

 

-	@Override

-	public boolean allowsMultiple() {

-		return true;

-	}

-

 	private PngChunkUNKNOWN(PngChunkUNKNOWN c, ImageInfo info) {

 		super(c.id, info);

 		System.arraycopy(c.data, 0, data, 0, c.data.length);

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

+	public ChunkOrderingConstraint getOrderingConstraint() {

+		return ChunkOrderingConstraint.NONE;

+	}

+

+	@Override

+	public ChunkRaw createRawChunk() {

 		ChunkRaw p = createEmptyChunk(data.length, false);

 		p.data = this.data;

 		return p;

 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		data = c.data;

 	}

 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java
index fd6c08273..64593eae4 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkZTXT.java
@@ -4,26 +4,32 @@ import java.io.ByteArrayOutputStream;
 import java.io.IOException;

 

 import jogamp.opengl.util.pngj.ImageInfo;

-import jogamp.opengl.util.pngj.PngHelper;

+import jogamp.opengl.util.pngj.PngHelperInternal;

 import jogamp.opengl.util.pngj.PngjException;

 

-

+/**

+ * zTXt chunk.

+ * <p>

+ * see http://www.w3.org/TR/PNG/#11zTXt

+ */

 public class PngChunkZTXT extends PngChunkTextVar {

+	public final static String ID = ChunkHelper.zTXt;

+

 	// http://www.w3.org/TR/PNG/#11zTXt

 	public PngChunkZTXT(ImageInfo info) {

-		super(ChunkHelper.zTXt, info);

+		super(ID, info);

 	}

 

 	@Override

-	public ChunkRaw createChunk() {

-		if (val.isEmpty() || key.isEmpty())

-			return null;

+	public ChunkRaw createRawChunk() {

+		if (key.isEmpty())

+			throw new PngjException("Text chunk key must be non empty");

 		try {

 			ByteArrayOutputStream ba = new ByteArrayOutputStream();

-			ba.write(key.getBytes(PngHelper.charsetLatin1));

+			ba.write(key.getBytes(PngHelperInternal.charsetLatin1));

 			ba.write(0); // separator

 			ba.write(0); // compression method: 0

-			byte[] textbytes = ChunkHelper.compressBytes(val.getBytes(PngHelper.charsetLatin1), true);

+			byte[] textbytes = ChunkHelper.compressBytes(val.getBytes(PngHelperInternal.charsetLatin1), true);

 			ba.write(textbytes);

 			byte[] b = ba.toByteArray();

 			ChunkRaw chunk = createEmptyChunk(b.length, false);

@@ -35,7 +41,7 @@ public class PngChunkZTXT extends PngChunkTextVar {
 	}

 

 	@Override

-	public void parseFromChunk(ChunkRaw c) {

+	public void parseFromRaw(ChunkRaw c) {

 		int nullsep = -1;

 		for (int i = 0; i < c.data.length; i++) { // look for first zero

 			if (c.data[i] != 0)

@@ -45,12 +51,12 @@ public class PngChunkZTXT extends PngChunkTextVar {
 		}

 		if (nullsep < 0 || nullsep > c.data.length - 2)

 			throw new PngjException("bad zTXt chunk: no separator found");

-		key = new String(c.data, 0, nullsep, PngHelper.charsetLatin1);

+		key = new String(c.data, 0, nullsep, PngHelperInternal.charsetLatin1);

 		int compmet = (int) c.data[nullsep + 1];

 		if (compmet != 0)

 			throw new PngjException("bad zTXt chunk: unknown compression method");

 		byte[] uncomp = ChunkHelper.compressBytes(c.data, nullsep + 2, c.data.length - nullsep - 2, false); // uncompress

-		val = new String(uncomp, PngHelper.charsetLatin1);

+		val = new String(uncomp, PngHelperInternal.charsetLatin1);

 	}

 

 	@Override

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java
index a82754588..139603448 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java
@@ -1,68 +1,72 @@
 package jogamp.opengl.util.pngj.chunks;
 
-import jogamp.opengl.util.pngj.PngHelper;
+import java.util.ArrayList;
+import java.util.List;
+
+import jogamp.opengl.util.pngj.PngHelperInternal;
 import jogamp.opengl.util.pngj.PngjException;
 
 /**
- * We consider "image metadata" every info inside the image except for the most basic image info (IHDR chunk - ImageInfo
- * class) and the pixels values.
- * 
+ * We consider "image metadata" every info inside the image except for the most
+ * basic image info (IHDR chunk - ImageInfo class) and the pixels values.
+ * <p>
  * This includes the palette (if present) and all the ancillary chunks
- * 
- * This class provides a wrapper over the collection of chunks of a image (read or to write) and provides some high
- * level methods to access them
- * 
+ * <p>
+ * This class provides a wrapper over the collection of chunks of a image (read
+ * or to write) and provides some high level methods to access them
  */
 public class PngMetadata {
-	private final ChunkList chunkList;
+	private final ChunksList chunkList;
 	private final boolean readonly;
 
-	public PngMetadata(ChunkList chunks, boolean readonly) {
+	public PngMetadata(ChunksList chunks) {
 		this.chunkList = chunks;
-		this.readonly = readonly;
+		if (chunks instanceof ChunksListForWrite) {
+			this.readonly = false;
+		} else {
+			this.readonly = true;
+		}
 	}
 
 	/**
 	 * Queues the chunk at the writer
+	 * <p>
+	 * lazyOverwrite: if true, checks if there is a queued "equivalent" chunk
+	 * and if so, overwrites it. However if that not check for already written
+	 * chunks.
 	 */
-	public boolean setChunk(PngChunk c, boolean overwriteIfPresent) {
+	public void queueChunk(final PngChunk c, boolean lazyOverwrite) {
+		ChunksListForWrite cl = getChunkListW();
 		if (readonly)
 			throw new PngjException("cannot set chunk : readonly metadata");
-		return chunkList.setChunk(c, overwriteIfPresent);
+		if (lazyOverwrite) {
+			ChunkHelper.trimList(cl.getQueuedChunks(), new ChunkPredicate() {
+				@Override
+				public boolean match(PngChunk c2) {
+					return ChunkHelper.equivalent(c, c2);
+				}
+			});
+		}
+		cl.queue(c);
 	}
 
-	
-	/**
-	 * Returns only one chunk or null if nothing found - does not include queued chunks
-	 *
-	 * If more than one chunk (after filtering by inner id) is found, then an exception is thrown (failifMultiple=true)
-	 * or the last one is returned (failifMultiple=false)
-	 * 
-	 * @param id Chunk id
-	 * @param innerid if not null, the chunk is assumed to be PngChunkTextVar or PngChunkSPLT, and filtered by that 'internal id'
-	 * @param failIfMultiple throw exception if more that one
-	 * @return chunk (not cloned)
-	 */
-	public PngChunk getChunk1(String id, String innerid, boolean failIfMultiple) {
-		return chunkList.getChunk1(id, innerid, failIfMultiple);
+	public void queueChunk(final PngChunk c) {
+		queueChunk(c, true);
 	}
 
-	/**
-	 *  Same as  getChunk1(id,  innerid=null, failIfMultiple=true);
-	 */
-	public PngChunk getChunk1(String id) {
-		return chunkList.getChunk1(id);
+	private ChunksListForWrite getChunkListW() {
+		return (ChunksListForWrite) chunkList;
 	}
 
 	// ///// high level utility methods follow ////////////
 
 	// //////////// DPI
 
-	/** 
-	 * returns -1 if not found or dimension unknown 
-	 **/
+	/**
+	 * returns -1 if not found or dimension unknown
+	 */
 	public double[] getDpi() {
-		PngChunk c = getChunk1(ChunkHelper.pHYs, null, true);
+		PngChunk c = chunkList.getById1(ChunkHelper.pHYs, true);
 		if (c == null)
 			return new double[] { -1, -1 };
 		else
@@ -76,31 +80,71 @@ public class PngMetadata {
 	public void setDpi(double x, double y) {
 		PngChunkPHYS c = new PngChunkPHYS(chunkList.imageInfo);
 		c.setAsDpi2(x, y);
-		setChunk(c, true);
+		queueChunk(c);
 	}
 
 	// //////////// TIME
 
-	public void setTimeNow(int secsAgo) {
+	/**
+	 * Creates a time chunk with current time, less secsAgo seconds
+	 * <p>
+	 *
+	 * @return Returns the created-queued chunk, just in case you want to
+	 *         examine or modify it
+	 */
+	public PngChunkTIME setTimeNow(int secsAgo) {
 		PngChunkTIME c = new PngChunkTIME(chunkList.imageInfo);
 		c.setNow(secsAgo);
-		setChunk(c, true);
+		queueChunk(c);
+		return c;
+	}
+
+	public PngChunkTIME setTimeNow() {
+		return setTimeNow(0);
 	}
 
-	public void setTimeYMDHMS(int yearx, int monx, int dayx, int hourx, int minx, int secx) {
+	/**
+	 * Creates a time chunk with diven date-time
+	 * <p>
+	 *
+	 * @return Returns the created-queued chunk, just in case you want to
+	 *         examine or modify it
+	 */
+	public PngChunkTIME setTimeYMDHMS(int yearx, int monx, int dayx, int hourx, int minx, int secx) {
 		PngChunkTIME c = new PngChunkTIME(chunkList.imageInfo);
 		c.setYMDHMS(yearx, monx, dayx, hourx, minx, secx);
-		setChunk(c, true);
+		queueChunk(c, true);
+		return c;
+	}
+
+	/**
+	 * null if not found
+	 */
+	public PngChunkTIME getTime() {
+		return (PngChunkTIME) chunkList.getById1(ChunkHelper.tIME);
 	}
 
 	public String getTimeAsString() {
-		PngChunk c = getChunk1(ChunkHelper.tIME, null, true);
-		return c != null ? ((PngChunkTIME) c).getAsString() : "";
+		PngChunkTIME c = getTime();
+		return c == null ? "" : c.getAsString();
 	}
 
 	// //////////// TEXT
 
-	public void setText(String k, String val, boolean useLatin1, boolean compress) {
+	/**
+	 * Creates a text chunk and queue it.
+	 * <p>
+	 *
+	 * @param k
+	 *            : key (latin1)
+	 * @param val
+	 *            (arbitrary, should be latin1 if useLatin1)
+	 * @param useLatin1
+	 * @param compress
+	 * @return Returns the created-queued chunks, just in case you want to
+	 *         examine, touch it
+	 */
+	public PngChunkTextVar setText(String k, String val, boolean useLatin1, boolean compress) {
 		if (compress && !useLatin1)
 			throw new PngjException("cannot compress non latin text");
 		PngChunkTextVar c;
@@ -115,21 +159,83 @@ public class PngMetadata {
 			((PngChunkITXT) c).setLangtag(k); // we use the same orig tag (this is not quite right)
 		}
 		c.setKeyVal(k, val);
-		setChunk(c, true);
+		queueChunk(c, true);
+		return c;
 	}
 
-	public void setText(String k, String val) {
-		setText(k, val, false, val.length() > 400);
+	public PngChunkTextVar setText(String k, String val) {
+		return setText(k, val, false, false);
 	}
 
-	/** tries all text chunks - returns null if not found */
+	/**
+	 * gets all text chunks with a given key
+	 * <p>
+	 * returns null if not found
+	 * <p>
+	 * Warning: this does not check the "lang" key of iTxt
+	 */
+	@SuppressWarnings("unchecked")
+	public List<? extends PngChunkTextVar> getTxtsForKey(String k) {
+		@SuppressWarnings("rawtypes")
+		List c = new ArrayList();
+		c.addAll(chunkList.getById(ChunkHelper.tEXt, k));
+		c.addAll(chunkList.getById(ChunkHelper.zTXt, k));
+		c.addAll(chunkList.getById(ChunkHelper.iTXt, k));
+		return c;
+	}
+
+	/**
+	 * Returns empty if not found, concatenated (with newlines) if multiple! -
+	 * and trimmed
+	 * <p>
+	 * Use getTxtsForKey() if you don't want this behaviour
+	 */
 	public String getTxtForKey(String k) {
-		PngChunk c = getChunk1(ChunkHelper.tEXt, k, true);
-		if (c == null)
-			c = getChunk1(ChunkHelper.zTXt, k, true);
-		if (c == null)
-			c = getChunk1(ChunkHelper.iTXt, k, true);
-		return c != null ? ((PngChunkTextVar) c).getVal() : null;
+		List<? extends PngChunkTextVar> li = getTxtsForKey(k);
+		if (li.isEmpty())
+			return "";
+		StringBuilder t = new StringBuilder();
+		for (PngChunkTextVar c : li)
+			t.append(c.getVal()).append("\n");
+		return t.toString().trim();
+	}
+
+	/**
+	 * Returns the palette chunk, if present
+	 *
+	 * @return null if not present
+	 */
+	public PngChunkPLTE getPLTE() {
+		return (PngChunkPLTE) chunkList.getById1(PngChunkPLTE.ID);
+	}
+
+	/**
+	 * Creates a new empty palette chunk, queues it for write and return it to
+	 * the caller, who should fill its entries
+	 */
+	public PngChunkPLTE createPLTEChunk() {
+		PngChunkPLTE plte = new PngChunkPLTE(chunkList.imageInfo);
+		queueChunk(plte);
+		return plte;
+	}
+
+	/**
+	 * Returns the TRNS chunk, if present
+	 *
+	 * @return null if not present
+	 */
+	public PngChunkTRNS getTRNS() {
+		return (PngChunkTRNS) chunkList.getById1(PngChunkTRNS.ID);
+	}
+
+	/**
+	 * Creates a new empty TRNS chunk, queues it for write and return it to the
+	 * caller, who should fill its entries
+	 */
+	public PngChunkTRNS createTRNSChunk() {
+		PngChunkTRNS trns = new PngChunkTRNS(chunkList.imageInfo);
+		queueChunk(trns);
+		return trns;
 	}
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/package.html b/src/jogl/classes/jogamp/opengl/util/pngj/package.html
index 209b39c59..0b0e2c8c1 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/package.html
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/package.html
@@ -1,11 +1,10 @@
 <html>

 <body bgcolor="white">

 <p>

-Contains the main classes for the PNGJ library.<p>

-Client code should rarely need more than the public members of this package.

+PNGJ main package

 </p>

 <p>

-See also the <code>nosandbox</code> package if available.

+Client code should rarely need more than the public members of this package.

 </p>

 </body>

 </html>

diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
index 5ff63d93b..feacdb951 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
@@ -28,6 +28,8 @@
 
 package jogamp.opengl.windows.wgl;
 
+import java.nio.IntBuffer;
+
 import jogamp.nativewindow.windows.GDI;
 import jogamp.nativewindow.windows.PIXELFORMATDESCRIPTOR;
 
@@ -52,6 +54,7 @@ public class WGLGLCapabilities extends GLCapabilities {
   public boolean setValuesByGDI() {
       arb_pixelformat = -1;
 
+      // ALPHA shall be set at last - due to it's auto setting by !opaque / samples
       setRedBits(pfd.getCRedBits());
       setGreenBits(pfd.getCGreenBits());
       setBlueBits(pfd.getCBlueBits());
@@ -62,10 +65,11 @@ public class WGLGLCapabilities extends GLCapabilities {
       setAccumAlphaBits(pfd.getCAccumAlphaBits());
       setDepthBits(pfd.getCDepthBits());
       setStencilBits(pfd.getCStencilBits());
-      setDoubleBuffered((pfd.getDwFlags() & GDI.PFD_DOUBLEBUFFER) != 0);
-      setStereo((pfd.getDwFlags() & GDI.PFD_STEREO) != 0);
-      setHardwareAccelerated((pfd.getDwFlags() & GDI.PFD_GENERIC_FORMAT) == 0
-                          || (pfd.getDwFlags() & GDI.PFD_GENERIC_ACCELERATED) != 0);
+      final int dwFlags = pfd.getDwFlags();
+      setDoubleBuffered((dwFlags & GDI.PFD_DOUBLEBUFFER) != 0);
+      setStereo((dwFlags & GDI.PFD_STEREO) != 0);
+      setHardwareAccelerated((dwFlags & GDI.PFD_GENERIC_FORMAT) == 0
+                          || (dwFlags & GDI.PFD_GENERIC_ACCELERATED) != 0);
       // n/a with non ARB/GDI method:
       //       multisample
       //       opaque
@@ -74,11 +78,49 @@ public class WGLGLCapabilities extends GLCapabilities {
       return true;
   }
 
-  public boolean setValuesByARB(final int[] iattribs, final int niattribs, final int[] iresults) {
+  public static final String PFD2String(PIXELFORMATDESCRIPTOR pfd, int pfdID) {
+      final int dwFlags = pfd.getDwFlags();
+      StringBuilder sb = new StringBuilder();
+      boolean sep = false;
+
+      if( 0 != (GDI.PFD_DRAW_TO_WINDOW & dwFlags ) ) {
+          sep = true;
+          sb.append("window");
+      }
+      if( 0 != (GDI.PFD_DRAW_TO_BITMAP & dwFlags ) ) {
+          if(sep) { sb.append(CSEP); } sep=true;
+          sb.append("bitmap");
+      }
+      if( 0 != (GDI.PFD_SUPPORT_OPENGL & dwFlags ) ) {
+          if(sep) { sb.append(CSEP); } sep=true;
+          sb.append("opengl");
+      }
+      if( 0 != (GDI.PFD_DOUBLEBUFFER & dwFlags ) ) {
+          if(sep) { sb.append(CSEP); } sep=true;
+          sb.append("dblbuf");
+      }
+      if( 0 != (GDI.PFD_STEREO & dwFlags ) ) {
+          if(sep) { sb.append(CSEP); } sep=true;
+          sb.append("stereo");
+      }
+      if( 0 == (GDI.PFD_GENERIC_FORMAT & dwFlags ) || 0 == (GDI.PFD_GENERIC_ACCELERATED & dwFlags ) ) {
+          if(sep) { sb.append(CSEP); } sep=true;
+          sb.append("hw-accel");
+      }
+      return "PFD[id = "+pfdID+" (0x"+Integer.toHexString(pfdID)+
+              "), colorBits "+pfd.getCColorBits()+", rgba "+pfd.getCRedBits()+ESEP+pfd.getCGreenBits()+ESEP+pfd.getCBlueBits()+ESEP+pfd.getCAlphaBits()+
+              ", accum-rgba "+pfd.getCAccumRedBits()+ESEP+pfd.getCAccumGreenBits()+ESEP+pfd.getCAccumBlueBits()+ESEP+pfd.getCAccumAlphaBits()+
+              ", dp/st/ms: "+pfd.getCDepthBits()+ESEP+pfd.getCStencilBits()+ESEP+"0"+
+              ", flags: "+sb.toString();
+  }
+
+  public boolean setValuesByARB(final IntBuffer iattribs, final int niattribs, final IntBuffer iresults) {
       arb_pixelformat = 1;
 
+      int alphaBits = 0;
       for (int i = 0; i < niattribs; i++) {
-          int attr = iattribs[i];
+          final int attr = iattribs.get(i);
+          final int res = iresults.get(i);
           switch (attr) {
               case WGLExt.WGL_DRAW_TO_WINDOW_ARB:
               case WGLExt.WGL_DRAW_TO_BITMAP_ARB:
@@ -86,101 +128,99 @@ public class WGLGLCapabilities extends GLCapabilities {
                   break;
 
               case WGLExt.WGL_ACCELERATION_ARB:
-                  setHardwareAccelerated(iresults[i] == WGLExt.WGL_FULL_ACCELERATION_ARB);
+                  setHardwareAccelerated(res == WGLExt.WGL_FULL_ACCELERATION_ARB);
                   break;
 
               case WGLExt.WGL_SUPPORT_OPENGL_ARB:
-                  if (iresults[i] != GL.GL_TRUE) {
+                  if (res != GL.GL_TRUE) {
                       return false;
                   }
                   break;
 
               case WGLExt.WGL_DEPTH_BITS_ARB:
-                  setDepthBits(iresults[i]);
+                  setDepthBits(res);
                   break;
 
               case WGLExt.WGL_STENCIL_BITS_ARB:
-                  setStencilBits(iresults[i]);
+                  setStencilBits(res);
                   break;
 
               case WGLExt.WGL_DOUBLE_BUFFER_ARB:
-                  setDoubleBuffered(iresults[i] == GL.GL_TRUE);
+                  setDoubleBuffered(res == GL.GL_TRUE);
                   break;
 
               case WGLExt.WGL_STEREO_ARB:
-                  setStereo(iresults[i] == GL.GL_TRUE);
+                  setStereo(res == GL.GL_TRUE);
                   break;
 
               case WGLExt.WGL_PIXEL_TYPE_ARB:
-                  if(iresults[i] == WGLExt.WGL_TYPE_COLORINDEX_ARB) {
+                  if(res == WGLExt.WGL_TYPE_COLORINDEX_ARB) {
                       return false; // color index not supported
                   }
 
-                  if (iresults[i] == WGLExt.WGL_TYPE_RGBA_FLOAT_ARB) {
-                      setPbufferFloatingPointBuffers(true);
+                  if (res == WGLExt.WGL_TYPE_RGBA_FLOAT_ARB) {
+                      return false; // not supported
                   }
-                  
+
                   // normal RGBA FB: WGLExt.WGL_TYPE_RGBA_ARB
                   // ignore unknown results here
                   break;
 
-              case WGLExt.WGL_FLOAT_COMPONENTS_NV:
-                  if (iresults[i] != 0) {
-                      setPbufferFloatingPointBuffers(true);
-                  }
-                  break;
-
               case WGLExt.WGL_RED_BITS_ARB:
-                  setRedBits(iresults[i]);
+                  setRedBits(res);
                   break;
 
               case WGLExt.WGL_GREEN_BITS_ARB:
-                  setGreenBits(iresults[i]);
+                  setGreenBits(res);
                   break;
 
               case WGLExt.WGL_BLUE_BITS_ARB:
-                  setBlueBits(iresults[i]);
+                  setBlueBits(res);
                   break;
 
               case WGLExt.WGL_ALPHA_BITS_ARB:
-                  setAlphaBits(iresults[i]);
+                  // ALPHA shall be set at last - due to it's auto setting by !opaque / samples
+                  alphaBits = res;
                   break;
 
               case WGLExt.WGL_ACCUM_RED_BITS_ARB:
-                  setAccumRedBits(iresults[i]);
+                  setAccumRedBits(res);
                   break;
 
               case WGLExt.WGL_ACCUM_GREEN_BITS_ARB:
-                  setAccumGreenBits(iresults[i]);
+                  setAccumGreenBits(res);
                   break;
 
               case WGLExt.WGL_ACCUM_BLUE_BITS_ARB:
-                  setAccumBlueBits(iresults[i]);
+                  setAccumBlueBits(res);
                   break;
 
               case WGLExt.WGL_ACCUM_ALPHA_BITS_ARB:
-                  setAccumAlphaBits(iresults[i]);
+                  setAccumAlphaBits(res);
                   break;
 
               case WGLExt.WGL_SAMPLE_BUFFERS_ARB:
-                  setSampleBuffers(iresults[i] != 0);
+                  setSampleBuffers(res != 0);
                   break;
 
               case WGLExt.WGL_SAMPLES_ARB:
-                  setNumSamples(iresults[i]);
+                  setNumSamples(res);
                   break;
 
               default:
-                  throw new GLException("Unknown pixel format attribute " + iattribs[i]);
+                  throw new GLException("Unknown pixel format attribute " + attr);
           }
       }
+      setAlphaBits(alphaBits);
       return true;
   }
 
+  @Override
   public Object cloneMutable() {
     return clone();
   }
 
+  @Override
   public Object clone() {
     try {
       return super.clone();
@@ -191,11 +231,11 @@ public class WGLGLCapabilities extends GLCapabilities {
 
   final public PIXELFORMATDESCRIPTOR getPFD() { return pfd; }
   final public int getPFDID() { return pfdID; }
-  
+
   final public boolean isSetByARB() { return 0 < arb_pixelformat; }
   final public boolean isSetByGDI() { return 0 > arb_pixelformat; }
   final public boolean isSet()      { return 0 != arb_pixelformat; }
-  
+
   @Override
   final public int getVisualID(VIDType type) throws NativeWindowException {
       switch(type) {
@@ -205,16 +245,17 @@ public class WGLGLCapabilities extends GLCapabilities {
               return getPFDID();
           default:
               throw new NativeWindowException("Invalid type <"+type+">");
-      }      
+      }
   }
-  
+
+  @Override
   public StringBuilder toString(StringBuilder sink) {
     if(null == sink) {
         sink = new StringBuilder();
     }
-    sink.append("wgl vid 0x").append(Integer.toHexString(pfdID)).append(" ");
+    sink.append("wgl vid ").append(pfdID).append(" ");
     switch (arb_pixelformat) {
-        case -1: 
+        case -1:
             sink.append("gdi");
             break;
         case  0:
@@ -229,4 +270,4 @@ public class WGLGLCapabilities extends GLCapabilities {
     sink.append(": ");
     return super.toString(sink);
   }
-}
\ No newline at end of file
+}
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLUtil.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLUtil.java
index f1598d580..6454a34b5 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLUtil.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLUtil.java
@@ -33,15 +33,15 @@ import jogamp.opengl.Debug;
 
 public class WGLUtil {
     /**
-     * Switch to use the <code>wgl</code> variants of {@link jogamp.opengl.windows.wgl.WGL} 
+     * Switch to use the <code>wgl</code> variants of {@link jogamp.opengl.windows.wgl.WGL}
      * to replace the following 5 GDI based functions (see below).
      * <p>
      * Disabled per default.
-     * </p> 
+     * </p>
      * <p>
      * You can enable it by defining the property <code>jogl.windows.useWGLVersionOf5WGLGDIFuncSet</code>.
      * </p>
-     * 
+     *
      * @see jogamp.nativewindow.windows.GDI#ChoosePixelFormat(long, PIXELFORMATDESCRIPTOR)
      * @see jogamp.nativewindow.windows.GDI#DescribePixelFormat(long, int, int, PIXELFORMATDESCRIPTOR)
      * @see jogamp.nativewindow.windows.GDI#GetPixelFormat(long)
@@ -49,8 +49,9 @@ public class WGLUtil {
      * @see jogamp.nativewindow.windows.GDI#SwapBuffers(long)
      */
     public static final boolean USE_WGLVersion_Of_5WGLGDIFuncSet;
-    
+
     static {
+        Debug.initSingleton();
         USE_WGLVersion_Of_5WGLGDIFuncSet = Debug.isPropertyDefined("jogl.windows.useWGLVersionOf5WGLGDIFuncSet", true);
         if(USE_WGLVersion_Of_5WGLGDIFuncSet) {
             System.err.println("Use WGL version of 5 WGL/GDI functions.");
@@ -62,34 +63,34 @@ public class WGLUtil {
             return WGL.wglChoosePixelFormat(hdc, pfd);
         } else {
             return GDI.ChoosePixelFormat(hdc, pfd);
-        }        
+        }
     }
     public static int DescribePixelFormat(long hdc, int pfdid, int pfdSize, PIXELFORMATDESCRIPTOR pfd)  {
         if(USE_WGLVersion_Of_5WGLGDIFuncSet) {
             return WGL.wglDescribePixelFormat(hdc, pfdid, pfdSize, pfd);
         } else {
             return GDI.DescribePixelFormat(hdc, pfdid, pfdSize, pfd);
-        }                
+        }
     }
     public static int GetPixelFormat(long hdc)  {
         if(USE_WGLVersion_Of_5WGLGDIFuncSet) {
             return WGL.wglGetPixelFormat(hdc);
         } else {
             return GDI.GetPixelFormat(hdc);
-        }                
+        }
     }
-    public static boolean SetPixelFormat(long hdc, int pfdid, PIXELFORMATDESCRIPTOR pfd)  {        
+    public static boolean SetPixelFormat(long hdc, int pfdid, PIXELFORMATDESCRIPTOR pfd)  {
         if(USE_WGLVersion_Of_5WGLGDIFuncSet) {
             return WGL.wglSetPixelFormat(hdc, pfdid, pfd);
         } else {
             return GDI.SetPixelFormat(hdc, pfdid, pfd);
-        }                
+        }
     }
-    public static boolean SwapBuffers(long hdc)  {        
+    public static boolean SwapBuffers(long hdc)  {
         if(USE_WGLVersion_Of_5WGLGDIFuncSet) {
             return WGL.wglSwapBuffers(hdc);
         } else {
             return GDI.SwapBuffers(hdc);
-        }                
+        }
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLContext.java
deleted file mode 100644
index 68b26b30d..000000000
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLContext.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.windows.wgl;
-
-import javax.media.opengl.*;
-
-public class WindowsBitmapWGLContext extends WindowsWGLContext {
-  public WindowsBitmapWGLContext(WindowsBitmapWGLDrawable drawable,
-                                   GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  public int getOffscreenContextPixelDataType() {
-      return GL.GL_UNSIGNED_BYTE;
-  }
-  
-  public int getOffscreenContextReadBuffer() {
-    // On Windows these contexts are always single-buffered
-    return GL.GL_FRONT;
-  }
-
-  public boolean offscreenImageNeedsVerticalFlip() {
-    // We can take care of this in the DIB creation (see below)
-    return false;
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java
index 574226570..f658a3598 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,41 +29,62 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.windows.wgl;
 
-import com.jogamp.common.nio.PointerBuffer;
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
+import javax.media.opengl.GLProfile;
 
 import jogamp.nativewindow.windows.BITMAPINFO;
 import jogamp.nativewindow.windows.BITMAPINFOHEADER;
 import jogamp.nativewindow.windows.GDI;
-import javax.media.opengl.GLCapabilitiesImmutable;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+
+import com.jogamp.common.nio.PointerBuffer;
 
 public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
   private long origbitmap;
   private long hbitmap;
 
-  protected WindowsBitmapWGLDrawable(GLDrawableFactory factory, NativeSurface target) {
-    super(factory, target, false);
+  private WindowsBitmapWGLDrawable(GLDrawableFactory factory, NativeSurface comp) {
+    super(factory, comp, false);
   }
 
-  protected void destroyImpl() {
-      setRealized(false);
+  protected static WindowsBitmapWGLDrawable create(GLDrawableFactory factory, NativeSurface comp) {
+    final WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)comp.getGraphicsConfiguration();
+    final AbstractGraphicsDevice aDevice = config.getScreen().getDevice();
+    if( !GLProfile.isAvailable(aDevice, GLProfile.GL2) ) {
+        throw new GLException("GLProfile GL2 n/a on "+aDevice+" but required for Windows BITMAP");
+    }
+    final GLProfile glp = GLProfile.get(GLProfile.GL2);
+    final GLCapabilitiesImmutable capsChosen0 = (GLCapabilitiesImmutable)config.getChosenCapabilities();
+    // RGB555 and also alpha channel is experienced to fail on some Windows machines
+    final GLCapabilitiesImmutable capsChosen1 = GLGraphicsConfigurationUtil.clipRGBAGLCapabilities(capsChosen0, false /* allowRGB555 */, false /* allowAlpha */);
+    final GLCapabilitiesImmutable capsChosen2 = GLGraphicsConfigurationUtil.fixGLProfile(capsChosen1, glp);
+    if( capsChosen0 != capsChosen2 ) {
+        config.setChosenCapabilities(capsChosen2);
+        if(DEBUG) {
+            System.err.println("WindowsBitmapWGLDrawable: "+capsChosen0+" -> "+capsChosen2);
+        }
+    }
+    return new WindowsBitmapWGLDrawable(factory, comp);
   }
-  
+
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         createBitmap();
@@ -72,35 +93,44 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new WindowsBitmapWGLContext(this, shareWith);
+    return new WindowsWGLContext(this, shareWith);
+  }
+
+  @Override
+  public boolean isGLOriented() {
+      return false;
   }
 
   private void createBitmap() {
     int werr;
-    NativeSurface ns = getNativeSurface();
+    final NativeSurface ns = getNativeSurface();
     if(DEBUG) {
-        System.err.println("WindowsBitmapWGLDrawable (1): "+ns);
+        System.err.println(getThreadName()+": WindowsBitmapWGLDrawable (1): "+ns);
     }
-    WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
-    GLCapabilitiesImmutable capabilities = (GLCapabilitiesImmutable)config.getRequestedCapabilities();
-    int width = getWidth();
-    int height = getHeight();
+    final WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
+    final GLCapabilitiesImmutable capsChosen = (GLCapabilitiesImmutable)config.getChosenCapabilities();
+    final int width = getWidth();
+    final int height = getHeight();
 
     //
     // 1. Create DIB Section
     //
-    BITMAPINFO info = BITMAPINFO.create();
-    BITMAPINFOHEADER header = info.getBmiHeader();
-    int bitsPerPixel = (capabilities.getRedBits() +
-                        capabilities.getGreenBits() +
-                        capabilities.getBlueBits() +
-                        capabilities.getAlphaBits());
+    final BITMAPINFO info = BITMAPINFO.create();
+    final BITMAPINFOHEADER header = info.getBmiHeader();
+    final int bitsPerPixelIn = capsChosen.getRedBits() +
+                               capsChosen.getGreenBits() +
+                               capsChosen.getBlueBits();
+    final int bitsPerPixel;
+    // Note: For BITMAP 32 bpp, the high-byte is _not_ used and hence maximum color is RGB888!
+    // Note: For BITAMP a biBitCount value other than 24 (RGB888) usually does not work!
+    bitsPerPixel = 24; // RGB888 only!
     header.setBiSize(BITMAPINFOHEADER.size());
     header.setBiWidth(width);
-    // NOTE: negating the height causes the DIB to be in top-down row
-    // order rather than bottom-up; ends up being correct during pixel
-    // readback
+    // NOTE: Positive height causes the DIB's origin at bottom-left (OpenGL),
+    // a negative height causes the DIB's origin at top-left (Java AWT, Windows, ..).
+    // We use !OpenGL origin to remove the need for vertical flip, see 'isGLOriented()' above.
     header.setBiHeight(-1 * height);
     header.setBiPlanes((short) 1);
     header.setBiBitCount((short) bitsPerPixel);
@@ -109,21 +139,21 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
     header.setBiClrUsed(0);
     header.setBiClrImportant(0);
     header.setBiCompression(GDI.BI_RGB);
-    int byteNum = width * height * ( bitsPerPixel >> 3 ) ;
+    final int byteNum = width * height * ( bitsPerPixel >> 3 ) ;
     header.setBiSizeImage(byteNum);
 
-    PointerBuffer pb = PointerBuffer.allocateDirect(1);
+    final PointerBuffer pb = PointerBuffer.allocateDirect(1);
     hbitmap = GDI.CreateDIBSection(0, info, GDI.DIB_RGB_COLORS, pb, 0, 0);
     werr = GDI.GetLastError();
     if(DEBUG) {
         long p = ( pb.capacity() > 0 ) ? pb.get(0) : 0;
         System.err.println("WindowsBitmapWGLDrawable: pb sz/ptr "+pb.capacity() + ", "+toHexString(p));
         System.err.println("WindowsBitmapWGLDrawable: " + width+"x"+height +
-                            ", bpp " + bitsPerPixel +
+                            ", bpp " + bitsPerPixelIn + " -> " + bitsPerPixel +
                             ", bytes " + byteNum +
                             ", header sz " + BITMAPINFOHEADER.size() +
                             ", DIB ptr num " + pb.capacity()+
-                            ", "+capabilities+
+                            ", "+capsChosen+
                             ", werr "+werr);
     }
     if (hbitmap == 0) {
@@ -140,9 +170,9 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
         hbitmap = 0;
       throw new GLException("Error creating device context for offscreen OpenGL context, werr "+werr);
     }
-    ((SurfaceChangeable)ns).setSurfaceHandle(hdc);
+    ((MutableSurface)ns).setSurfaceHandle(hdc);
     if(DEBUG) {
-        System.err.println("WindowsBitmapWGLDrawable (2): "+ns);
+        System.err.println(getThreadName()+": WindowsBitmapWGLDrawable (2): "+ns);
     }
 
     if ((origbitmap = GDI.SelectObject(hdc, hbitmap)) == 0) {
@@ -152,10 +182,10 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
       hdc = 0;
       throw new GLException("Error selecting bitmap into new device context");
     }
-    
+
     config.updateGraphicsConfiguration(getFactory(), ns, null);
   }
-  
+
   protected void destroyBitmap() {
     NativeSurface ns = getNativeSurface();
     if (ns.getSurfaceHandle() != 0) {
@@ -165,7 +195,7 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
       GDI.DeleteDC(ns.getSurfaceHandle());
       origbitmap = 0;
       hbitmap = 0;
-      ((SurfaceChangeable)ns).setSurfaceHandle(0);
+      ((MutableSurface)ns).setSurfaceHandle(0);
     }
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsDummyWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsDummyWGLDrawable.java
deleted file mode 100644
index 3ba5508ab..000000000
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsDummyWGLDrawable.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.windows.wgl;
-
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLDrawableFactory;
-import javax.media.opengl.GLProfile;
-
-import javax.media.nativewindow.AbstractGraphicsScreen;
-import jogamp.nativewindow.windows.GDI;
-import jogamp.nativewindow.windows.GDIUtil;
-
-import javax.media.nativewindow.NativeSurface;
-import javax.media.opengl.GLCapabilities;
-import javax.media.opengl.GLException;
-import jogamp.nativewindow.windows.GDISurface;
-
-public class WindowsDummyWGLDrawable extends WindowsWGLDrawable {
-  private long hwnd;
-  private boolean handleHwndLifecycle;
-
-  private WindowsDummyWGLDrawable(GLDrawableFactory factory, GDISurface ns, boolean handleHwndLifecycle) {
-    super(factory, ns, true);
-    this.handleHwndLifecycle = handleHwndLifecycle;
-    
-    if(NativeSurface.LOCK_SURFACE_NOT_READY >= ns.lockSurface()) {
-        throw new GLException("WindowsDummyWGLDrawable: surface not ready (lockSurface)");
-    }
-    try {
-        WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
-        config.updateGraphicsConfiguration(factory, ns, null);
-        if (DEBUG) {
-          System.err.println("WindowsDummyWGLDrawable: "+config);
-        }
-    } catch (Throwable t) {
-        destroyImpl();
-        throw new GLException(t);
-    } finally {
-        unlockSurface();
-    }
-  }
-
-  public static WindowsDummyWGLDrawable create(GLDrawableFactory factory, GLProfile glp, AbstractGraphicsScreen absScreen,
-                                               long windowHandle, int width, int height, boolean handleWindowLifecycle) {
-    if(0 == windowHandle) {
-        throw new GLException("Error windowHandle 0, werr: "+GDI.GetLastError());
-    }
-    GLCapabilities caps = new GLCapabilities(glp);
-    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(caps, absScreen);
-    GDISurface ns = new GDISurface(cfg, windowHandle);
-    ns.surfaceSizeChanged(width, height);
-    return new WindowsDummyWGLDrawable(factory, ns, handleWindowLifecycle);
-  }
-
-  public GLContext createContext(GLContext shareWith) {
-    // FIXME: figure out how to hook back in the Java 2D / JOGL bridge
-    return new WindowsWGLContext(this, shareWith);
-  }
-
-  protected void destroyImpl() {
-    if (handleHwndLifecycle && hwnd != 0) {
-      GDI.ShowWindow(hwnd, GDI.SW_HIDE);
-      GDIUtil.DestroyDummyWindow(hwnd);
-      hwnd = 0;
-    }
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java
index 745782085..c46b3c9dd 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -50,14 +50,11 @@ import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-import com.jogamp.nativewindow.WrappedSurface;
-
+import jogamp.nativewindow.WrappedSurface;
 import jogamp.nativewindow.windows.GDI;
 import jogamp.opengl.GLContextShareSet;
 
-
 public class WindowsExternalWGLContext extends WindowsWGLContext {
-  private GLContext lastContext;
 
   private WindowsExternalWGLContext(Drawable drawable, long ctx, WindowsWGLGraphicsConfiguration cfg) {
     super(drawable, null);
@@ -66,7 +63,9 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
       System.err.println(getThreadName() + ": Created external OpenGL context " + toHexString(ctx) + " for " + this);
     }
     GLContextShareSet.contextCreated(this);
-    setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT);  // use GL_VERSION
+    if( !setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+        throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+    }
     getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
   }
 
@@ -103,32 +102,18 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
             System.err.println("WindowsExternalWGLContext valid hdc/pfd, retrieved cfg: " + cfg);
         }
     }
-    return new WindowsExternalWGLContext(new Drawable(factory, new WrappedSurface(cfg, hdc)), ctx, cfg);
-  }
-
-  public int makeCurrent() throws GLException {
-    // Save last context if necessary to allow external GLContexts to
-    // talk to other GLContexts created by this library
-    GLContext cur = getCurrent();
-    if (cur != null && cur != this) {
-      lastContext = cur;
-      setCurrent(null);
-    }
-    return super.makeCurrent();
-  }  
-
-  public void release() throws GLException {
-    super.release();
-    setCurrent(lastContext);
-    lastContext = null;
+    return new WindowsExternalWGLContext(new Drawable(factory, new WrappedSurface(cfg, hdc, 64, 64, true)), ctx, cfg);
   }
 
+  @Override
   protected void makeCurrentImpl() throws GLException {
   }
 
+  @Override
   protected void releaseImpl() throws GLException {
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
   }
 
@@ -138,14 +123,17 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
       super(factory, comp, true);
     }
 
+    @Override
     public GLContext createContext(GLContext shareWith) {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getWidth() {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getHeight() {
       throw new GLException("Should not call this");
     }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java
index ad2e91bed..f8c237c9e 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -49,9 +49,10 @@ import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-import com.jogamp.nativewindow.WrappedSurface;
-
+import jogamp.nativewindow.WrappedSurface;
 import jogamp.nativewindow.windows.GDI;
+import jogamp.nativewindow.windows.GDIUtil;
+
 
 public class WindowsExternalWGLDrawable extends WindowsWGLDrawable {
 
@@ -69,25 +70,28 @@ public class WindowsExternalWGLDrawable extends WindowsWGLDrawable {
       throw new GLException("Error: attempted to make an external GLContext without a valid pixelformat, werr " + GDI.GetLastError());
     }
 
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
-    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.createFromExternal(factory, hdc, pfdID, glp, aScreen, true);
-    return new WindowsExternalWGLDrawable(factory, new WrappedSurface(cfg, hdc));
+    final AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
+    final WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.createFromExternal(factory, hdc, pfdID, glp, aScreen, true);
+    return new WindowsExternalWGLDrawable(factory, new WrappedSurface(cfg, hdc, 64, 64, true));
   }
 
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
     return new WindowsWGLContext(this, shareWith);
   }
-  
+
   public void setSize(int newWidth, int newHeight) {
     throw new GLException("Should not call this");
   }
 
+  @Override
   public int getWidth() {
     throw new GLException("Should not call this");
-  }  
+  }
 
+  @Override
   public int getHeight() {
     throw new GLException("Should not call this");
-  }  
+  }
 }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLContext.java
deleted file mode 100644
index a06ab8f0e..000000000
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLContext.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.windows.wgl;
-
-import java.util.*;
-
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import jogamp.opengl.*;
-
-public class WindowsOnscreenWGLContext extends WindowsWGLContext {
-  public WindowsOnscreenWGLContext(WindowsOnscreenWGLDrawable drawable,
-                                  GLContext shareWith) {
-    super(drawable, shareWith);
-  }    
-}
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLDrawable.java
index 6ad330ccc..61fb787c6 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsOnscreenWGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,27 +29,29 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.windows.wgl;
 
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
 
 public class WindowsOnscreenWGLDrawable extends WindowsWGLDrawable {
   protected WindowsOnscreenWGLDrawable(GLDrawableFactory factory, NativeSurface component) {
     super(factory, component, false);
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new WindowsOnscreenWGLContext(this, shareWith);
+    return new WindowsWGLContext(this, shareWith);
   }
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java
deleted file mode 100644
index 0f610495d..000000000
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java
+++ /dev/null
@@ -1,150 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.windows.wgl;
-
-import javax.media.opengl.*;
-
-import jogamp.opengl.GLContextImpl;
-
-public class WindowsPbufferWGLContext extends WindowsWGLContext {
-  // State for render-to-texture and render-to-texture-rectangle support
-  private boolean rtt;       // render-to-texture?
-  private boolean hasRTT;    // render-to-texture extension available?
-  private boolean rect;      // render-to-texture-rectangle?
-  private int textureTarget; // e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_NV
-  private int texture;       // actual texture object
-
-  protected WindowsPbufferWGLContext(WindowsPbufferWGLDrawable drawable,
-                                 GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  public void bindPbufferToTexture() {
-    if (!rtt) {
-      throw new GLException("Shouldn't try to bind a pbuffer to a texture if render-to-texture hasn't been " +
-                            "specified in its GLCapabilities");
-    }
-    GL gl = getGL();
-    WGLExt wglExt = getWGLExt();
-    gl.glBindTexture(textureTarget, texture);
-    if (rtt && hasRTT) {
-      if (!wglExt.wglBindTexImageARB(((WindowsPbufferWGLDrawable)drawable).getPbufferHandle(), WGLExt.WGL_FRONT_LEFT_ARB)) {
-        throw new GLException("Binding of pbuffer to texture failed: " + wglGetLastError());
-      }
-    }
-    // FIXME: comment is wrong now
-    // Note that if the render-to-texture extension is not supported,
-    // we perform a glCopyTexImage2D in swapBuffers().
-  }
-
-  public void releasePbufferFromTexture() {
-    if (!rtt) {
-      throw new GLException("Shouldn't try to bind a pbuffer to a texture if render-to-texture hasn't been " +
-                            "specified in its GLCapabilities");
-    }
-    if (rtt && hasRTT) {
-      WGLExt wglExt = getWGLExt();
-      if (!wglExt.wglReleaseTexImageARB(((WindowsPbufferWGLDrawable)drawable).getPbufferHandle(), WGLExt.WGL_FRONT_LEFT_ARB)) {
-        throw new GLException("Releasing of pbuffer from texture failed: " + wglGetLastError());
-      }
-    }
-  }
-
-  protected boolean createImpl(GLContextImpl shareWith) {
-    boolean res = super.createImpl(shareWith);
-    if(res) {
-      GLCapabilitiesImmutable capabilities = drawable.getChosenGLCapabilities();
-
-      // Initialize render-to-texture support if requested
-      GL gl = getGL();
-      rtt  = capabilities.getPbufferRenderToTexture();
-      rect = gl.isGL2GL3() && capabilities.getPbufferRenderToTextureRectangle();
-
-      if (rtt) {
-        if (DEBUG) {
-          System.err.println("Initializing render-to-texture support");
-        }
-
-        if (!gl.isExtensionAvailable("WGL_ARB_render_texture")) {
-          System.err.println("WindowsPbufferWGLContext: WARNING: WGL_ARB_render_texture extension not " +
-                             "supported; implementing render_to_texture support using slow texture readback");
-        } else {
-          hasRTT = true;
-
-          if (rect && !gl.isExtensionAvailable("GL_NV_texture_rectangle")) {
-            System.err.println("WindowsPbufferWGLContext: WARNING: GL_NV_texture_rectangle extension not " +
-                               "supported; skipping requested render_to_texture_rectangle support for pbuffer");
-            rect = false;
-          }
-          if (rect) {
-            if (DEBUG) {
-              System.err.println("  Using render-to-texture-rectangle");
-            }
-            textureTarget = GL2.GL_TEXTURE_RECTANGLE_ARB;
-          } else {
-            if (DEBUG) {
-              System.err.println("  Using vanilla render-to-texture");
-            }
-            textureTarget = GL.GL_TEXTURE_2D;
-          }
-          int[] tmp = new int[1];
-          gl.glGenTextures(1, tmp, 0);
-          texture = tmp[0];
-          gl.glBindTexture(textureTarget, texture);
-          gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
-          gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
-          gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
-          gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
-          gl.glCopyTexImage2D(textureTarget, 0, GL.GL_RGB, 0, 0, drawable.getWidth(), drawable.getHeight(), 0);
-        }
-      }
-    }
-    return res;
-  }
-
-  public int getFloatingPointMode() {
-    return ((WindowsPbufferWGLDrawable)drawable).getFloatingPointMode();
-  }
-
-  private static String wglGetLastError() {
-    return WindowsWGLDrawableFactory.wglGetLastError();
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java
index 0988f3eca..2e60c682b 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,48 +29,47 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.windows.wgl;
 
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
+
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowException;
-import javax.media.nativewindow.SurfaceChangeable;
-import javax.media.opengl.GL;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
-// import javax.media.opengl.GLPbuffer;
 import javax.media.opengl.GLProfile;
 
+import com.jogamp.common.nio.Buffers;
+
 import jogamp.nativewindow.windows.GDI;
 import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.windows.wgl.WindowsWGLDrawableFactory.SharedResource;
 
-import javax.media.opengl.GLCapabilitiesImmutable;
-
 public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
   private WGLExt cachedWGLExt; // cached WGLExt instance from parent GLCanvas,
                                // needed to destroy pbuffer
   private long buffer; // pbuffer handle
 
-  private int floatMode;
-  
   protected WindowsPbufferWGLDrawable(GLDrawableFactory factory, NativeSurface target) {
     super(factory, target, false);
   }
 
-  protected void destroyImpl() {
-      setRealized(false);
-  }
-  
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         createPbuffer();
@@ -79,8 +78,9 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new WindowsPbufferWGLContext(this, shareWith);
+    return new WindowsWGLContext(this, shareWith);
   }
 
   protected void destroyPbuffer() {
@@ -95,7 +95,7 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
           if (wglExt.wglReleasePbufferDCARB(buffer, ns.getSurfaceHandle()) == 0) {
             throw new GLException("Error releasing pbuffer device context: error code " + GDI.GetLastError());
           }
-          ((SurfaceChangeable)ns).setSurfaceHandle(0);
+          ((MutableSurface)ns).setSurfaceHandle(0);
         }
         if (!wglExt.wglDestroyPbufferARB(buffer)) {
             throw new GLException("Error destroying pbuffer: error code " + GDI.GetLastError());
@@ -111,139 +111,106 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
     return buffer;
   }
 
-  public int getFloatingPointMode() {
-    return floatMode;
-  }
-
   private void createPbuffer() {
     WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration) getNativeSurface().getGraphicsConfiguration();
-    SharedResource sharedResource = ((WindowsWGLDrawableFactory)factory).getOrCreateSharedResource(config.getScreen().getDevice());
+    SharedResource sharedResource = ((WindowsWGLDrawableFactory)factory).getOrCreateSharedResourceImpl(config.getScreen().getDevice());
     NativeSurface sharedSurface = sharedResource.getDrawable().getNativeSurface();
     if (NativeSurface.LOCK_SURFACE_NOT_READY >= sharedSurface.lockSurface()) {
       throw new NativeWindowException("Could not lock (sharedSurface): "+this);
     }
     try {
         long sharedHdc = sharedSurface.getSurfaceHandle();
-        WGLExt wglExt = sharedResource.getContext().getWGLExt();
-        
+        WGLExt wglExt = ((WindowsWGLContext)sharedResource.getContext()).getWGLExt();
+
         if (DEBUG) {
-            System.out.println("Pbuffer config: " + config);
+            System.out.println(getThreadName()+": Pbuffer config: " + config);
         }
-    
-        int[]   iattributes = new int  [2*WindowsWGLGraphicsConfiguration.MAX_ATTRIBS];
-        float[] fattributes = new float[1];
+
+        final int winattrPbuffer = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(false /* onscreen */, false /* fbo */, true /* pbuffer */, false /* bitmap */);
+
+        final IntBuffer iattributes = Buffers.newDirectIntBuffer(2*WindowsWGLGraphicsConfiguration.MAX_ATTRIBS);
+        final FloatBuffer fattributes = Buffers.newDirectFloatBuffer(1);
         int[]   floatModeTmp = new int[1];
         int     niattribs   = 0;
-        int     width, height;
-    
-        GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
-        GLProfile glProfile = chosenCaps.getGLProfile();
-    
+
+        final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
+        final GLProfile glProfile = chosenCaps.getGLProfile();
+        final AbstractGraphicsDevice device = config.getScreen().getDevice();
+
         if (DEBUG) {
-          System.out.println("Pbuffer parentHdc = " + toHexString(sharedHdc));
-          System.out.println("Pbuffer chosenCaps: " + chosenCaps);
+          System.out.println(getThreadName()+": Pbuffer parentHdc = " + toHexString(sharedHdc));
+          System.out.println(getThreadName()+": Pbuffer chosenCaps: " + chosenCaps);
         }
-    
+
         if(!WindowsWGLGraphicsConfiguration.GLCapabilities2AttribList(chosenCaps,
                                         iattributes, sharedResource, -1, floatModeTmp)){
           throw new GLException("Pbuffer-related extensions not supported");
         }
-    
-        floatMode = floatModeTmp[0];
-        boolean rtt      = chosenCaps.getPbufferRenderToTexture();
-        boolean rect     = chosenCaps.getPbufferRenderToTextureRectangle();
-        boolean useFloat = chosenCaps.getPbufferFloatingPointBuffers();
-        // boolean ati      = false;
-    
-        /**
-        if (useFloat) {
-          ati = (floatMode == GLPbuffer.ATI_FLOAT);
-        } */
-    
-        int[] pformats = new int[WindowsWGLGraphicsConfiguration.MAX_PFORMATS];
-        int   nformats;
-        int[] nformatsTmp = new int[1];
+
+        final IntBuffer pformats = Buffers.newDirectIntBuffer(WindowsWGLGraphicsConfiguration.MAX_PFORMATS);
+        final IntBuffer nformatsTmp = Buffers.newDirectIntBuffer(1);
         if (!wglExt.wglChoosePixelFormatARB(sharedHdc,
-                                            iattributes, 0,
-                                            fattributes, 0,
-                                            WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
-                                            pformats, 0,
-                                            nformatsTmp, 0)) {
+                                            iattributes, fattributes, WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
+                                            pformats, nformatsTmp)) {
           throw new GLException("pbuffer creation error: wglChoosePixelFormat() failed");
         }
-        nformats = nformatsTmp[0];
+        final int nformats = Math.min(nformatsTmp.get(0), WindowsWGLGraphicsConfiguration.MAX_PFORMATS);
         if (nformats <= 0) {
           throw new GLException("pbuffer creation error: Couldn't find a suitable pixel format");
         }
-    
+
         if (DEBUG) {
           System.err.println("" + nformats + " suitable pixel formats found");
           for (int i = 0; i < nformats; i++) {
-            WGLGLCapabilities dbgCaps = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(sharedResource, sharedHdc, pformats[i], glProfile, false, true);
-            System.err.println("pixel format " + pformats[i] + " (index " + i + "): " + dbgCaps);
+            WGLGLCapabilities dbgCaps = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(sharedResource, device, glProfile,
+                                          sharedHdc, pformats.get(i), winattrPbuffer);
+            System.err.println("pixel format " + pformats.get(i) + " (index " + i + "): " + dbgCaps);
           }
         }
-    
+
         int pfdid = 0;
         long tmpBuffer = 0;
         {
             int whichFormat;
             // Loop is a workaround for bugs in NVidia's recent drivers
             for (whichFormat = 0; whichFormat < nformats; whichFormat++) {
-              int format = pformats[whichFormat];
-    
+              int format = pformats.get(whichFormat);
+
               // Create the p-buffer.
               niattribs = 0;
-    
-              if (rtt) {
-                iattributes[niattribs++]   = WGLExt.WGL_TEXTURE_FORMAT_ARB;
-                if (useFloat) {
-                  iattributes[niattribs++] = WGLExt.WGL_TEXTURE_FLOAT_RGB_NV;
-                } else {
-                  iattributes[niattribs++] = WGLExt.WGL_TEXTURE_RGBA_ARB;
-                }
-    
-                iattributes[niattribs++] = WGLExt.WGL_TEXTURE_TARGET_ARB;
-                iattributes[niattribs++] = rect ? WGLExt.WGL_TEXTURE_RECTANGLE_NV : WGLExt.WGL_TEXTURE_2D_ARB;
-    
-                iattributes[niattribs++] = WGLExt.WGL_MIPMAP_TEXTURE_ARB;
-                iattributes[niattribs++] = GL.GL_FALSE;
-    
-                iattributes[niattribs++] = WGLExt.WGL_PBUFFER_LARGEST_ARB;
-                iattributes[niattribs++] = GL.GL_FALSE;
-              }
-    
-              iattributes[niattribs++] = 0;
-    
-              tmpBuffer = wglExt.wglCreatePbufferARB(sharedHdc, format, getWidth(), getHeight(), iattributes, 0);
+
+              iattributes.put(niattribs++, 0);
+
+              tmpBuffer = wglExt.wglCreatePbufferARB(sharedHdc, format, getWidth(), getHeight(), iattributes);
               if (tmpBuffer != 0) {
                 // Done
                 break;
               }
             }
-    
+
             if (0 == tmpBuffer) {
               throw new GLException("pbuffer creation error: wglCreatePbuffer() failed: tried " + nformats +
                                     " pixel formats, last error was: " + wglGetLastError());
             }
-            pfdid = pformats[whichFormat];
+            pfdid = pformats.get(whichFormat);
         }
-    
+
         // Get the device context.
         long tmpHdc = wglExt.wglGetPbufferDCARB(tmpBuffer);
         if (tmpHdc == 0) {
           throw new GLException("pbuffer creation error: wglGetPbufferDC() failed");
         }
-    
+
         NativeSurface ns = getNativeSurface();
         // Set up instance variables
         buffer = tmpBuffer;
-        ((SurfaceChangeable)ns).setSurfaceHandle(tmpHdc);
-        cachedWGLExt = wglExt;   
-    
+        ((MutableSurface)ns).setSurfaceHandle(tmpHdc);
+        cachedWGLExt = wglExt;
+
         // Re-query chosen pixel format
         {
-          WGLGLCapabilities newCaps = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(sharedResource, sharedHdc, pfdid, glProfile, false, true);
+          WGLGLCapabilities newCaps = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(sharedResource, device, glProfile,
+                                          sharedHdc, pfdid, winattrPbuffer);
           if(null == newCaps) {
             throw new GLException("pbuffer creation error: unable to re-query chosen PFD ID: " + pfdid + ", hdc " + GLDrawableImpl.toHexString(tmpHdc));
           }
@@ -252,14 +219,6 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
           }
           config.setCapsPFD(newCaps);
         }
-    
-        // Determine the actual width and height we were able to create.
-        int[] tmp = new int[1];
-        wglExt.wglQueryPbufferARB( buffer, WGLExt.WGL_PBUFFER_WIDTH_ARB,  tmp, 0 );
-        width = tmp[0];
-        wglExt.wglQueryPbufferARB( buffer, WGLExt.WGL_PBUFFER_HEIGHT_ARB, tmp, 0 );
-        height = tmp[0];
-        ((SurfaceChangeable)ns).surfaceSizeChanged(width, height);
     } finally {
         sharedSurface.unlockSurface();
     }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
index 217d88f3c..b214252c1 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,6 +41,7 @@
 package jogamp.opengl.windows.wgl;
 
 import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -51,8 +52,12 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLCapabilitiesImmutable;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLExtensions;
+import com.jogamp.opengl.GLRendererQuirks;
+
 import jogamp.nativewindow.windows.GDI;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
@@ -77,8 +82,8 @@ public class WindowsWGLContext extends GLContextImpl {
     functionNameMap.put("glFreeMemoryNV", "wglFreeMemoryNV");
 
     extensionNameMap = new HashMap<String, String>();
-    extensionNameMap.put("GL_ARB_pbuffer", "WGL_ARB_pbuffer");
-    extensionNameMap.put("GL_ARB_pixel_format", "WGL_ARB_pixel_format");
+    extensionNameMap.put(GLExtensions.ARB_pbuffer, WindowsWGLDrawableFactory.WGL_ARB_pbuffer);
+    extensionNameMap.put(GLExtensions.ARB_pixel_format, WindowsWGLDrawableFactory.WGL_ARB_pixel_format);
   }
 
   // FIXME: figure out how to hook back in the Java 2D / JOGL bridge
@@ -88,7 +93,7 @@ public class WindowsWGLContext extends GLContextImpl {
   }
 
   @Override
-  protected void resetStates() {
+  protected void resetStates(boolean isInit) {
     wglGetExtensionsStringEXTInitialized=false;
     wglGetExtensionsStringEXTAvailable=false;
     wglGLReadDrawableAvailableSet=false;
@@ -96,10 +101,11 @@ public class WindowsWGLContext extends GLContextImpl {
     // no inner state _wglExt=null;
     wglExtProcAddressTable=null;
     hasSwapIntervalSGI = 0;
-    hasSwapGroupNV = 0;    
-    super.resetStates();    
+    hasSwapGroupNV = 0;
+    super.resetStates(isInit);
   }
-  
+
+  @Override
   public Object getPlatformGLExtensions() {
     return getWGLExt();
   }
@@ -114,6 +120,7 @@ public class WindowsWGLContext extends GLContextImpl {
     return _wglExt;
   }
 
+  @Override
   public final boolean isGLReadDrawableAvailable() {
     if(!wglGLReadDrawableAvailableSet && null != getWGLExtProcAddressTable()) {
         WindowsWGLDrawableFactory factory = (WindowsWGLDrawableFactory)drawable.getFactoryImpl();
@@ -159,6 +166,7 @@ public class WindowsWGLContext extends GLContextImpl {
     return ok;
   }
 
+  @Override
   public final ProcAddressTable getPlatformExtProcAddressTable() {
     return getWGLExtProcAddressTable();
   }
@@ -167,15 +175,19 @@ public class WindowsWGLContext extends GLContextImpl {
     return wglExtProcAddressTable;
   }
 
+  @Override
   protected Map<String, String> getFunctionNameMap() { return functionNameMap; }
 
+  @Override
   protected Map<String, String> getExtensionNameMap() { return extensionNameMap; }
 
+  @Override
   protected void destroyContextARBImpl(long context) {
     WGL.wglMakeCurrent(0, 0);
     WGL.wglDeleteContext(context);
   }
 
+  @Override
   protected long createContextARBImpl(long share, boolean direct, int ctp, int major, int minor) {
     if( null == getWGLExtProcAddressTable()) {
         updateGLXProcAddressTable();
@@ -207,14 +219,13 @@ public class WindowsWGLContext extends GLContextImpl {
     };
 
     if ( major > 3 || major == 3 && minor >= 2  ) {
-        // FIXME: Verify with a None drawable binding (default framebuffer)
         attribs[idx_profile+0]  = WGLExt.WGL_CONTEXT_PROFILE_MASK_ARB;
         if( ctBwdCompat ) {
             attribs[idx_profile+1]  = WGLExt.WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
         } else {
             attribs[idx_profile+1]  = WGLExt.WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
-        } 
-    } 
+        }
+    }
 
     if ( major >= 3 ) {
         if( !ctBwdCompat && ctFwdCompat ) {
@@ -226,7 +237,8 @@ public class WindowsWGLContext extends GLContextImpl {
     }
 
     try {
-        ctx = _wglExt.wglCreateContextAttribsARB(drawable.getHandle(), share, attribs, 0);
+        final IntBuffer attribsNIO = Buffers.newDirectIntBuffer(attribs);
+        ctx = _wglExt.wglCreateContextAttribsARB(drawable.getHandle(), share, attribsNIO);
     } catch (RuntimeException re) {
         if(DEBUG) {
           Throwable t = new Throwable("Info: WindowWGLContext.createContextARBImpl wglCreateContextAttribsARB failed with "+getGLVersion(major, minor, ctp, "@creation"), re);
@@ -255,74 +267,92 @@ public class WindowsWGLContext extends GLContextImpl {
    * Creates and initializes an appropriate OpenGL context. Should only be
    * called by {@link #makeCurrentImpl()}.
    */
-  protected boolean createImpl(GLContextImpl shareWith) {
-    AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
-    AbstractGraphicsDevice device = config.getScreen().getDevice();
-    WindowsWGLDrawableFactory factory = (WindowsWGLDrawableFactory)drawable.getFactoryImpl();
-    WindowsWGLContext sharedContext = (WindowsWGLContext) factory.getOrCreateSharedContextImpl(device);
-    GLCapabilitiesImmutable glCaps = drawable.getChosenGLCapabilities();
+  @Override
+  protected boolean createImpl(long shareWithHandle) {
+    final AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
+    final AbstractGraphicsDevice device = config.getScreen().getDevice();
+    final WindowsWGLDrawableFactory factory = (WindowsWGLDrawableFactory)drawable.getFactoryImpl();
+    final WindowsWGLContext sharedContext = (WindowsWGLContext) factory.getOrCreateSharedContext(device);
+    final GLCapabilitiesImmutable glCaps = drawable.getChosenGLCapabilities();
 
     isGLReadDrawableAvailable(); // trigger setup wglGLReadDrawableAvailable
 
-    // Windows can set up sharing of display lists after creation time
-    long share = 0;
-    if (null != shareWith) {
-      share = shareWith.getHandle();
-      if (share == 0) {
-        throw new GLException("GLContextShareSet returned an invalid OpenGL context");
-      }
+    if (DEBUG) {
+        System.err.println(getThreadName() + ": createImpl: START "+glCaps+", share "+toHexString(shareWithHandle));
     }
 
     boolean createContextARBTried = false;
 
-    // utilize the shared context's GLXExt in case it was using the ARB method and it already exists
-    if( null!=sharedContext && sharedContext.isCreatedWithARBMethod() ) {
-        contextHandle = createContextARB(share, true);
+    // utilize the shared context's GLXExt in case it was using the ARB method and it already exists ; exclude BITMAP
+    if( null != sharedContext && sharedContext.isCreatedWithARBMethod() && !glCaps.isBitmap() ) {
+        if ( sharedContext.getRendererQuirks().exist( GLRendererQuirks.NeedCurrCtx4ARBCreateContext ) ) {
+            if(GLContext.CONTEXT_NOT_CURRENT == sharedContext.makeCurrent()) {
+                throw new GLException("Could not make Shared Context current: "+sharedContext);
+            }
+            contextHandle = createContextARB(shareWithHandle, true);
+            sharedContext.release();
+            if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+                throw new GLException("Cannot make previous verified context current: 0x" + toHexString(contextHandle) + ", werr: " + GDI.GetLastError());
+            }
+        } else {
+            contextHandle = createContextARB(shareWithHandle, true);
+        }
         createContextARBTried = true;
-        if (DEBUG && 0!=contextHandle) {
-            System.err.println(getThreadName() + ": createImpl: OK (ARB, using sharedContext) share "+share);
+        if ( DEBUG && 0 != contextHandle ) {
+            System.err.println(getThreadName() + ": createImpl: OK (ARB, using sharedContext) share "+toHexString(shareWithHandle));
         }
     }
 
-    long temp_ctx = 0;
-    if(0==contextHandle) {
+    final long temp_ctx;
+    if( 0 == contextHandle ) {
         // To use WGL_ARB_create_context, we have to make a temp context current,
         // so we are able to use GetProcAddress
         temp_ctx = WGL.wglCreateContext(drawable.getHandle());
-        if (temp_ctx == 0) {
+        if ( 0 == temp_ctx ) {
           throw new GLException("Unable to create temp OpenGL context for device context " + toHexString(drawable.getHandle()));
         }
-        if (!WGL.wglMakeCurrent(drawable.getHandle(), temp_ctx)) {
+        if ( !WGL.wglMakeCurrent(drawable.getHandle(), temp_ctx) ) {
             throw new GLException("Error making temp context current: 0x" + toHexString(temp_ctx) + ", werr: "+GDI.GetLastError());
         }
-        setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT);  // use GL_VERSION
+        if( !setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+            throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+        }
         WGL.wglMakeCurrent(0, 0); // release temp context
 
-        if( !createContextARBTried) {
+        if( !createContextARBTried ) {
             // is*Available calls are valid since setGLFunctionAvailability(..) was called
-            final boolean isProcCreateContextAttribsARBAvailable = isFunctionAvailable("wglCreateContextAttribsARB");
-            final boolean isExtARBCreateContextAvailable = isExtensionAvailable("WGL_ARB_create_context");
+            final boolean isProcCreateContextAttribsARBAvailable;
+            final boolean isExtARBCreateContextAvailable;
+            if( !glCaps.isBitmap() ) { // exclude ARB if BITMAP
+                isProcCreateContextAttribsARBAvailable = isFunctionAvailable("wglCreateContextAttribsARB");
+                isExtARBCreateContextAvailable = isExtensionAvailable("WGL_ARB_create_context");
+            } else {
+                isProcCreateContextAttribsARBAvailable = false;
+                isExtARBCreateContextAvailable = false;
+            }
             if ( isProcCreateContextAttribsARBAvailable && isExtARBCreateContextAvailable ) {
                 // initial ARB context creation
-                contextHandle = createContextARB(share, true);
+                contextHandle = createContextARB(shareWithHandle, true);
                 createContextARBTried=true;
                 if (DEBUG) {
-                    if(0!=contextHandle) {
-                        System.err.println(getThreadName() + ": createContextImpl: OK (ARB, initial) share "+share);
+                    if( 0 != contextHandle ) {
+                        System.err.println(getThreadName() + ": createContextImpl: OK (ARB, initial) share "+toHexString(shareWithHandle));
                     } else {
-                        System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - creation failed - share "+share);
+                        System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - creation failed - share "+toHexString(shareWithHandle));
                     }
                 }
             } else if (DEBUG) {
-                System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - extension not available - share "+share+
-                                   ", isProcCreateContextAttribsARBAvailable "+isProcCreateContextAttribsARBAvailable+", isExtGLXARBCreateContextAvailable "+isExtARBCreateContextAvailable);            
+                System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - extension not available - share "+toHexString(shareWithHandle)+
+                                   ", isProcCreateContextAttribsARBAvailable "+isProcCreateContextAttribsARBAvailable+", isExtGLXARBCreateContextAvailable "+isExtARBCreateContextAvailable);
             }
         }
+    } else {
+        temp_ctx = 0;
     }
-    
-    if(0!=contextHandle) {
-        share = 0; // mark as shared thx to the ARB create method
-        if(0!=temp_ctx) {
+
+    if( 0 != contextHandle ) {
+        shareWithHandle = 0; // mark as shared thx to the ARB create method
+        if( 0 != temp_ctx ) {
             WGL.wglMakeCurrent(0, 0);
             WGL.wglDeleteContext(temp_ctx);
             if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
@@ -330,10 +360,10 @@ public class WindowsWGLContext extends GLContextImpl {
             }
         }
     } else {
-        if(glCaps.getGLProfile().isGL3()) {
+        if( glCaps.getGLProfile().isGL3() ) {
           WGL.wglMakeCurrent(0, 0);
           WGL.wglDeleteContext(temp_ctx);
-          throw new GLException("WindowsWGLContext.createContext ctx !ARB, context > GL2 requested "+getGLVersion());
+          throw new GLException(getThreadName()+": WindowsWGLContex.createContextImpl ctx !ARB, profile > GL2 requested (OpenGL >= 3.0.1). Requested: "+glCaps.getGLProfile()+", current: "+getGLVersion());
         }
         if(DEBUG) {
           System.err.println("WindowsWGLContext.createContext failed, fall back to !ARB context "+getGLVersion());
@@ -341,41 +371,49 @@ public class WindowsWGLContext extends GLContextImpl {
 
         // continue with temp context for GL < 3.0
         contextHandle = temp_ctx;
-        if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+        if ( !wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
             WGL.wglMakeCurrent(0, 0);
             WGL.wglDeleteContext(contextHandle);
             throw new GLException("Error making old context current: 0x" + toHexString(contextHandle) + ", werr: " + GDI.GetLastError());
         }
-        if(0!=share) {
-            // Only utilize the classic GDI 'wglShareLists' shared context method 
+        if( 0 != shareWithHandle ) {
+            // Windows can set up sharing of display lists after creation time if using GDI
+            // Only utilize the classic GDI 'wglShareLists' shared context method
             // for traditional non ARB context.
-            if (!WGL.wglShareLists(share, contextHandle)) {
-                throw new GLException("wglShareLists(" + toHexString(share) +
+            if ( !WGL.wglShareLists(shareWithHandle, contextHandle) ) {
+                throw new GLException("wglShareLists(" + toHexString(shareWithHandle) +
                                       ", " + toHexString(contextHandle) + ") failed: werr " + GDI.GetLastError());
             }
         }
         if (DEBUG) {
-            System.err.println(getThreadName() + ": createImpl: OK (old) share "+share);
+            System.err.println(getThreadName() + ": createImpl: OK (old) share "+toHexString(shareWithHandle));
         }
     }
 
     return true;
   }
-  
+
+  @Override
   protected void  makeCurrentImpl() throws GLException {
     if (WGL.wglGetCurrentContext() != contextHandle) {
       if (!wglMakeContextCurrent(drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
-        throw new GLException("Error making context current: 0x" + toHexString(contextHandle) + ", werr: " + GDI.GetLastError() + ", " + this);
+        throw new GLException("Error making context " + toHexString(contextHandle) +
+                              " current on Thread " + getThreadName() +
+                              ", drawableWrite " + toHexString(drawable.getHandle()) +
+                              ", drawableRead "+ toHexString(drawableRead.getHandle()) +
+                              ", werr: " + GDI.GetLastError() + ", " + this);
       }
     }
   }
 
+  @Override
   protected void releaseImpl() throws GLException {
     if (!wglMakeContextCurrent(0, 0, 0)) {
         throw new GLException("Error freeing OpenGL context, werr: " + GDI.GetLastError());
     }
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
       WGL.wglMakeCurrent(0, 0);
       if (!WGL.wglDeleteContext(contextHandle)) {
@@ -383,12 +421,14 @@ public class WindowsWGLContext extends GLContextImpl {
       }
   }
 
+  @Override
   protected void copyImpl(GLContext source, int mask) throws GLException {
     if (!WGL.wglCopyContext(source.getHandle(), getHandle(), mask)) {
       throw new GLException("wglCopyContext failed");
     }
   }
 
+  @Override
   protected final void updateGLXProcAddressTable() {
     final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
     final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
@@ -421,10 +461,11 @@ public class WindowsWGLContext extends GLContextImpl {
         }
     }
   }
-  
+
+  @Override
   protected final StringBuilder getPlatformExtensionsStringImpl() {
     StringBuilder sb = new StringBuilder();
-    
+
     if (!wglGetExtensionsStringEXTInitialized) {
       wglGetExtensionsStringEXTAvailable = (WGL.wglGetProcAddress("wglGetExtensionsStringEXT") != 0);
       wglGetExtensionsStringEXTInitialized = true;
@@ -434,7 +475,7 @@ public class WindowsWGLContext extends GLContextImpl {
     }
     return sb;
   }
-  
+
   @Override
   protected boolean setSwapIntervalImpl(int interval) {
     WGLExt wglExt = getWGLExt();
@@ -450,7 +491,7 @@ public class WindowsWGLContext extends GLContextImpl {
     }
     return false;
   }
-  
+
   private final int initSwapGroupImpl(WGLExt wglExt) {
       if(0==hasSwapGroupNV) {
         try {
@@ -462,7 +503,7 @@ public class WindowsWGLContext extends GLContextImpl {
       }
       return hasSwapGroupNV;
   }
-  
+
   @Override
   protected final boolean queryMaxSwapGroupsImpl(int[] maxGroups, int maxGroups_offset,
                                                  int[] maxBarriers, int maxBarriers_offset) {
@@ -471,16 +512,19 @@ public class WindowsWGLContext extends GLContextImpl {
       if (initSwapGroupImpl(wglExt)>0) {
         final NativeSurface ns = drawable.getNativeSurface();
         try {
-            if( wglExt.wglQueryMaxSwapGroupsNV(ns.getDisplayHandle(), 
-                                               maxGroups, maxGroups_offset,
-                                               maxBarriers, maxBarriers_offset) ) {
+            final IntBuffer maxGroupsNIO = Buffers.newDirectIntBuffer(maxGroups.length - maxGroups_offset);
+            final IntBuffer maxBarriersNIO = Buffers.newDirectIntBuffer(maxBarriers.length - maxBarriers_offset);
+
+            if( wglExt.wglQueryMaxSwapGroupsNV(ns.getDisplayHandle(), maxGroupsNIO, maxBarriersNIO) ) {
+                maxGroupsNIO.get(maxGroups, maxGroups_offset, maxGroupsNIO.remaining());
+                maxBarriersNIO.get(maxGroups, maxGroups_offset, maxBarriersNIO.remaining());
                 res = true;
             }
         } catch (Throwable t) { hasSwapGroupNV=-1; }
       }
       return res;
   }
-  
+
   @Override
   protected final boolean joinSwapGroupImpl(int group) {
       boolean res = false;
@@ -495,7 +539,7 @@ public class WindowsWGLContext extends GLContextImpl {
       }
       return res;
   }
-  
+
   @Override
   protected final boolean bindSwapBarrierImpl(int group, int barrier) {
       boolean res = false;
@@ -507,31 +551,17 @@ public class WindowsWGLContext extends GLContextImpl {
             }
         } catch (Throwable t) { hasSwapGroupNV=-1; }
       }
-      return res;  
-  }
-  
-  public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
-    return getWGLExt().wglAllocateMemoryNV(arg0, arg1, arg2, arg3);
-  }
-
-  public int getOffscreenContextPixelDataType() {
-    throw new GLException("Should not call this");
-  }
-
-  public int getOffscreenContextReadBuffer() {
-    throw new GLException("Should not call this");
-  }
-
-  public boolean offscreenImageNeedsVerticalFlip() {
-    throw new GLException("Should not call this");
+      return res;
   }
 
-  public void bindPbufferToTexture() {
-    throw new GLException("Should not call this");
+  @Override
+  public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {
+    return getWGLExt().wglAllocateMemoryNV(size, readFrequency, writeFrequency, priority);
   }
 
-  public void releasePbufferFromTexture() {
-    throw new GLException("Should not call this");
+  @Override
+  public final void glFreeMemoryNV(ByteBuffer pointer) {
+    getWGLExt().wglFreeMemoryNV(pointer);
   }
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawable.java
index 579b11940..66071cbe1 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -51,7 +51,13 @@ import jogamp.opengl.GLDynamicLookupHelper;
 
 
 public abstract class WindowsWGLDrawable extends GLDrawableImpl {
-  private static final boolean PROFILING = Debug.isPropertyDefined("jogl.debug.GLDrawable.profiling", true);
+  private static final boolean PROFILING;
+
+  static {
+      Debug.initSingleton();
+      PROFILING = Debug.isPropertyDefined("jogl.debug.GLDrawable.profiling", true);
+  }
+
   private static final int PROFILING_TICKS = 200;
   private int  profilingSwapBuffersTicks;
   private long profilingSwapBuffersTime;
@@ -60,43 +66,45 @@ public abstract class WindowsWGLDrawable extends GLDrawableImpl {
     super(factory, comp, realized);
   }
 
+  @Override
   protected void setRealizedImpl() {
-    if(!realized) {
-        return; // nothing todo ..
-    }
-
-    NativeSurface ns = getNativeSurface();
-    WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
-    config.updateGraphicsConfiguration(getFactory(), ns, null);
-    if (DEBUG) {
-      System.err.println("WindowsWGLDrawable.setRealized(true): "+config);
+    if(realized) {
+        NativeSurface ns = getNativeSurface();
+        WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
+        config.updateGraphicsConfiguration(getFactory(), ns, null);
+        if (DEBUG) {
+          System.err.println(getThreadName()+": WindowsWGLDrawable.setRealized(true): "+config);
+        }
     }
   }
 
-  protected final void swapBuffersImpl() {
-    // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()        
-    final long t0;
-    if (PROFILING) {
-      t0 = System.currentTimeMillis();
-    } else {
-      t0 = 0;
-    }
+  @Override
+  protected final void swapBuffersImpl(boolean doubleBuffered) {
+    if(doubleBuffered) {
+        final long t0;
+        if (PROFILING) {
+          t0 = System.currentTimeMillis();
+        } else {
+          t0 = 0;
+        }
 
-    if (!WGLUtil.SwapBuffers(getHandle()) && (GDI.GetLastError() != GDI.ERROR_SUCCESS)) {
-      throw new GLException("Error swapping buffers");
-    }
+        if (!WGLUtil.SwapBuffers(getHandle()) && (GDI.GetLastError() != GDI.ERROR_SUCCESS)) {
+          throw new GLException("Error swapping buffers");
+        }
 
-    if (PROFILING) {
-      profilingSwapBuffersTime += System.currentTimeMillis() - t0;
-      if (++profilingSwapBuffersTicks == PROFILING_TICKS) {
-        System.err.println("SwapBuffers calls: " + profilingSwapBuffersTime + " ms / " + PROFILING_TICKS + "  calls (" +
-                           ((float) profilingSwapBuffersTime / (float) PROFILING_TICKS) + " ms/call)");
-        profilingSwapBuffersTime = 0;
-        profilingSwapBuffersTicks = 0;
-      }
+        if (PROFILING) {
+          profilingSwapBuffersTime += System.currentTimeMillis() - t0;
+          if (++profilingSwapBuffersTicks == PROFILING_TICKS) {
+            System.err.println("SwapBuffers calls: " + profilingSwapBuffersTime + " ms / " + PROFILING_TICKS + "  calls (" +
+                               ((float) profilingSwapBuffersTime / (float) PROFILING_TICKS) + " ms/call)");
+            profilingSwapBuffersTime = 0;
+            profilingSwapBuffersTicks = 0;
+          }
+        }
     }
   }
 
+  @Override
   public GLDynamicLookupHelper getGLDynamicLookupHelper() {
     return getFactoryImpl().getGLDynamicLookupHelper(0);
   }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
index 494bb307e..7fa8775cf 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -42,82 +42,90 @@ package jogamp.opengl.windows.wgl;
 
 import java.nio.Buffer;
 import java.nio.ShortBuffer;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 
+import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.DefaultGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.NativeWindowFactory;
-import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.ProxySurface;
-import javax.media.opengl.GL;
-import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
+import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
-import javax.media.opengl.GLProfile.ShutdownType;
-
-import com.jogamp.common.JogampRuntimeException;
-import com.jogamp.common.nio.PointerBuffer;
-import com.jogamp.common.os.Platform;
-import com.jogamp.common.util.ReflectionUtil;
-import com.jogamp.common.util.VersionNumber;
-import com.jogamp.nativewindow.WrappedSurface;
-import com.jogamp.nativewindow.windows.WindowsGraphicsDevice;
 
+import jogamp.nativewindow.WrappedSurface;
 import jogamp.nativewindow.windows.GDI;
-import jogamp.nativewindow.windows.GDIUtil;
+import jogamp.nativewindow.windows.GDIDummyUpstreamSurfaceHook;
 import jogamp.nativewindow.windows.GDISurface;
 import jogamp.nativewindow.windows.RegisteredClassFactory;
 import jogamp.opengl.DesktopGLDynamicLookupHelper;
+import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.SharedResourceRunner;
 
+import com.jogamp.common.nio.PointerBuffer;
+import com.jogamp.common.util.ReflectionUtil;
+import com.jogamp.nativewindow.windows.WindowsGraphicsDevice;
+import com.jogamp.opengl.GLExtensions;
+import com.jogamp.opengl.GLRendererQuirks;
+
 public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   private static DesktopGLDynamicLookupHelper windowsWGLDynamicLookupHelper = null;
-  
+
   public WindowsWGLDrawableFactory() {
     super();
 
     synchronized(WindowsWGLDrawableFactory.class) {
-        if(null==windowsWGLDynamicLookupHelper) {
-            DesktopGLDynamicLookupHelper tmp = null;
-            try {
-                tmp = new DesktopGLDynamicLookupHelper(new WindowsWGLDynamicLibraryBundleInfo());
-            } catch (GLException gle) {
-                if(DEBUG) {
-                    gle.printStackTrace();
+        if( null == windowsWGLDynamicLookupHelper ) {
+            windowsWGLDynamicLookupHelper = AccessController.doPrivileged(new PrivilegedAction<DesktopGLDynamicLookupHelper>() {
+                @Override
+                public DesktopGLDynamicLookupHelper run() {
+                    DesktopGLDynamicLookupHelper tmp;
+                    try {
+                        tmp = new DesktopGLDynamicLookupHelper(new WindowsWGLDynamicLibraryBundleInfo());
+                        if(null!=tmp && tmp.isLibComplete()) {
+                            WGL.getWGLProcAddressTable().reset(tmp);
+                        }
+                    } catch (Exception ex) {
+                        tmp = null;
+                        if(DEBUG) {
+                            ex.printStackTrace();
+                        }
+                    }
+                    return tmp;
                 }
-            }            
-            if(null!=tmp && tmp.isLibComplete()) {
-                windowsWGLDynamicLookupHelper = tmp;
-                WGL.getWGLProcAddressTable().reset(windowsWGLDynamicLookupHelper);
-            }               
+            } );
         }
     }
-    
+
     defaultDevice = new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
-    
+
     if(null!=windowsWGLDynamicLookupHelper) {
         // Register our GraphicsConfigurationFactory implementations
         // The act of constructing them causes them to be registered
         WindowsWGLGraphicsConfigurationFactory.registerFactory();
         if(GLProfile.isAWTAvailable()) {
             try {
-              ReflectionUtil.callStaticMethod("jogamp.opengl.windows.wgl.awt.WindowsAWTWGLGraphicsConfigurationFactory", 
-                                              "registerFactory", null, null, getClass().getClassLoader());                
-            } catch (JogampRuntimeException jre) { /* n/a .. */ }
+              ReflectionUtil.callStaticMethod("jogamp.opengl.windows.wgl.awt.WindowsAWTWGLGraphicsConfigurationFactory",
+                                              "registerFactory", null, null, getClass().getClassLoader());
+            } catch (Exception jre) { /* n/a .. */ }
         }
-    
+
         sharedMap = new HashMap<String, SharedResourceRunner.Resource>();
-    
+
         // Init shared resources off thread
         // Will be released via ShutdownHook
         sharedResourceRunner = new SharedResourceRunner(new SharedResourceImplementation());
@@ -125,7 +133,17 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     }
   }
 
-  protected final void destroy(ShutdownType shutdownType) {
+  @Override
+  protected final boolean isComplete() {
+      return null != windowsWGLDynamicLookupHelper;
+  }
+
+
+  @Override
+  protected final void shutdownImpl() {
+    if( DEBUG ) {
+        System.err.println("WindowsWGLDrawableFactory.shutdown");
+    }
     if(null != sharedResourceRunner) {
         sharedResourceRunner.stop();
         sharedResourceRunner = null;
@@ -137,15 +155,15 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     defaultDevice = null;
     /**
      * Pulling away the native library may cause havoc ..
-     * 
-    if(ShutdownType.COMPLETE == shutdownType && null != windowsWGLDynamicLookupHelper) {
-        windowsWGLDynamicLookupHelper.destroy();
-        windowsWGLDynamicLookupHelper = null;
-    } */
-    
+     *
+       windowsWGLDynamicLookupHelper.destroy();
+     */
+    windowsWGLDynamicLookupHelper = null;
+
     RegisteredClassFactory.shutdownSharedClasses();
   }
 
+  @Override
   public GLDynamicLookupHelper getGLDynamicLookupHelper(int profile) {
       return windowsWGLDynamicLookupHelper;
   }
@@ -155,16 +173,17 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   private HashMap<String /*connection*/, SharedResourceRunner.Resource> sharedMap;
 
   private long processAffinityChanges = 0;
-  private PointerBuffer procMask = PointerBuffer.allocateDirect(1);
-  private PointerBuffer sysMask = PointerBuffer.allocateDirect(1);
+  private final PointerBuffer procMask = PointerBuffer.allocateDirect(1);
+  private final PointerBuffer sysMask = PointerBuffer.allocateDirect(1);
 
+  @Override
   protected void enterThreadCriticalZone() {
     synchronized (sysMask) {
         if( 0 == processAffinityChanges) {
             long pid = GDI.GetCurrentProcess();
             if ( GDI.GetProcessAffinityMask(pid, procMask, sysMask) ) {
                 if(DEBUG) {
-                    System.err.println("WindowsWGLDrawableFactory.enterThreadCriticalZone() - 0x" + Long.toHexString(pid) + " - " + Thread.currentThread().getName());
+                    System.err.println("WindowsWGLDrawableFactory.enterThreadCriticalZone() - 0x" + Long.toHexString(pid) + " - " + getThreadName());
                     // Thread.dumpStack();
                 }
                 processAffinityChanges = pid;
@@ -174,6 +193,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     }
   }
 
+  @Override
   protected void leaveThreadCriticalZone() {
     synchronized (sysMask) {
         if( 0 != processAffinityChanges) {
@@ -183,35 +203,25 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
                                                        " this PID 0x" + Long.toHexString(pid) );
             }
             if(DEBUG) {
-                System.err.println("WindowsWGLDrawableFactory.leaveThreadCriticalZone() - 0x" + Long.toHexString(pid) + " - " + Thread.currentThread().getName());
+                System.err.println("WindowsWGLDrawableFactory.leaveThreadCriticalZone() - 0x" + Long.toHexString(pid) + " - " + getThreadName());
             }
             GDI.SetProcessAffinityMask(pid, sysMask.get(0));
         }
     }
   }
 
-  /**
-   * http://msdn.microsoft.com/en-us/library/ms724832%28v=vs.85%29.aspx
-   * Windows XP    5.1
-   */
-  static final VersionNumber winXPVersionNumber = new VersionNumber ( 5, 1, 0); 
-    
   static class SharedResource implements SharedResourceRunner.Resource {
+      private final boolean hasARBPixelFormat;
+      private final boolean hasARBMultisample;
+      private final boolean hasARBPBuffer;
+      private final boolean hasARBReadDrawable;
       private WindowsGraphicsDevice device;
       private AbstractGraphicsScreen screen;
-      private WindowsDummyWGLDrawable drawable;
-      private WindowsWGLContext context;
-      private boolean hasARBPixelFormat;
-      private boolean hasARBMultisample;
-      private boolean hasARBPBuffer;
-      private boolean hasARBReadDrawable;
-      private String vendor;
-      private boolean isVendorATI;
-      private boolean isVendorNVIDIA;
-      private boolean needsCurrenContext4ARBPFDQueries;
-
-      SharedResource(WindowsGraphicsDevice dev, AbstractGraphicsScreen scrn, WindowsDummyWGLDrawable draw, WindowsWGLContext ctx,
-                     boolean arbPixelFormat, boolean arbMultisample, boolean arbPBuffer, boolean arbReadDrawable, String glVendor) {
+      private GLDrawableImpl drawable;
+      private GLContextImpl context;
+
+      SharedResource(WindowsGraphicsDevice dev, AbstractGraphicsScreen scrn, GLDrawableImpl draw, GLContextImpl ctx,
+                     boolean arbPixelFormat, boolean arbMultisample, boolean arbPBuffer, boolean arbReadDrawable) {
           device = dev;
           screen = scrn;
           drawable = draw;
@@ -220,90 +230,71 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
           hasARBMultisample = arbMultisample;
           hasARBPBuffer = arbPBuffer;
           hasARBReadDrawable = arbReadDrawable;
-          vendor = glVendor;
-          if(null != vendor) {
-              isVendorNVIDIA = vendor.startsWith("NVIDIA") ;
-              isVendorATI = vendor.startsWith("ATI") ;
-          }
-          
-            if ( isVendorATI() ) {
-              final VersionNumber winVersion = Platform.getOSVersionNumber();
-              final boolean isWinXPOrLess = winVersion.compareTo(winXPVersionNumber) <= 0;
-              if(DEBUG) {
-                  System.err.println("needsCurrenContext4ARBPFDQueries: "+winVersion+" <= "+winXPVersionNumber+" = "+isWinXPOrLess+" - "+Platform.getOSVersion());
-              }
-              needsCurrenContext4ARBPFDQueries = isWinXPOrLess;
-            } else { 
-            if(DEBUG) {
-                  System.err.println("needsCurrenContext4ARBPFDQueries: false");
-              }
-              needsCurrenContext4ARBPFDQueries = false;
-          }                   
       }
-      
+
+      @Override
+      public final boolean isValid() {
+          return null != context;
+      }
+      @Override
       final public AbstractGraphicsDevice getDevice() { return device; }
+      @Override
       final public AbstractGraphicsScreen getScreen() { return screen; }
-      final public WindowsWGLDrawable getDrawable() { return drawable; }
-      final public WindowsWGLContext getContext() { return context; }
+      @Override
+      final public GLDrawableImpl getDrawable() { return drawable; }
+      @Override
+      final public GLContextImpl getContext() { return context; }
+      @Override
+      public GLRendererQuirks getRendererQuirks() {
+          return null != context ? context.getRendererQuirks() : null;
+      }
 
       final boolean hasARBPixelFormat() { return hasARBPixelFormat; }
       final boolean hasARBMultisample() { return hasARBMultisample; }
       final boolean hasARBPBuffer() { return hasARBPBuffer; }
       final boolean hasReadDrawable() { return hasARBReadDrawable; }
-      
-      final String vendor() { return vendor; }
-      final boolean isVendorATI() { return isVendorATI; }
-      final boolean isVendorNVIDIA() { return isVendorNVIDIA; }
-      
-      /**
-       * Solves bug #480
-       * 
-       * TODO: Validate if bug is actually relates to the 'old' ATI Windows driver for old GPU's like X300 etc
-       * and unrelated to the actual Windows version !
-       * 
-       * @return true if GL_VENDOR is ATI _and_ platform is Windows version XP or less! 
-       */
-      final boolean needsCurrentContext4ARBPFDQueries() { return needsCurrenContext4ARBPFDQueries; }      
   }
 
   class SharedResourceImplementation implements SharedResourceRunner.Implementation {
+        @Override
         public void clear() {
-            synchronized(sharedMap) {
-                sharedMap.clear();
-            }
+            sharedMap.clear();
         }
+        @Override
         public SharedResourceRunner.Resource mapPut(String connection, SharedResourceRunner.Resource resource) {
-            synchronized(sharedMap) {
-                return sharedMap.put(connection, resource);
-            }
+            return sharedMap.put(connection, resource);
         }
+        @Override
         public SharedResourceRunner.Resource mapGet(String connection) {
-            synchronized(sharedMap) {
-                return sharedMap.get(connection);
-            }
+            return sharedMap.get(connection);
         }
+        @Override
         public Collection<SharedResourceRunner.Resource> mapValues() {
             synchronized(sharedMap) {
                 return sharedMap.values();
             }
         }
 
+        @Override
+        public boolean isDeviceSupported(String connection) {
+            return true;
+        }
+
+        @Override
         public SharedResourceRunner.Resource createSharedResource(String connection) {
-            WindowsGraphicsDevice sharedDevice = new WindowsGraphicsDevice(connection, AbstractGraphicsDevice.DEFAULT_UNIT);
+            final WindowsGraphicsDevice sharedDevice = new WindowsGraphicsDevice(connection, AbstractGraphicsDevice.DEFAULT_UNIT);
             sharedDevice.lock();
             try {
-                AbstractGraphicsScreen absScreen = new DefaultGraphicsScreen(sharedDevice, 0);
-                GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
+                final AbstractGraphicsScreen absScreen = new DefaultGraphicsScreen(sharedDevice, 0);
+                final GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
                 if (null == glp) {
                     throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
                 }
-                final int f_dim = 64;
-                long hwnd = GDIUtil.CreateDummyWindow(0, 0, f_dim, f_dim);
-                WindowsDummyWGLDrawable sharedDrawable = WindowsDummyWGLDrawable.create(WindowsWGLDrawableFactory.this, glp, absScreen, hwnd, f_dim, f_dim, true);
-                if (null == sharedDrawable) {
-                    throw new GLException("Couldn't create shared drawable for screen: "+absScreen+", "+glp);
-                }
-                WindowsWGLContext sharedContext  = (WindowsWGLContext) sharedDrawable.createContext(null);
+                final GLCapabilitiesImmutable caps = new GLCapabilities(glp);
+                final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, caps, caps, null, 64, 64));
+                sharedDrawable.setRealized(true);
+
+                final GLContextImpl sharedContext  = (GLContextImpl) sharedDrawable.createContext(null);
                 if (null == sharedContext) {
                     throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
                 }
@@ -311,15 +302,13 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
                 boolean hasARBMultisample;
                 boolean hasARBPBuffer;
                 boolean hasARBReadDrawableAvailable;
-                String vendor;
                 sharedContext.makeCurrent();
                 try {
                     hasARBPixelFormat = sharedContext.isExtensionAvailable(WGL_ARB_pixel_format);
                     hasARBMultisample = sharedContext.isExtensionAvailable(WGL_ARB_multisample);
-                    hasARBPBuffer = sharedContext.isExtensionAvailable(GL_ARB_pbuffer);
+                    hasARBPBuffer = sharedContext.isExtensionAvailable(GLExtensions.ARB_pbuffer);
                     hasARBReadDrawableAvailable = sharedContext.isExtensionAvailable(WGL_ARB_make_current_read) &&
                                             sharedContext.isFunctionAvailable(wglMakeContextCurrent);
-                    vendor = sharedContext.getGL().glGetString(GL.GL_VENDOR);
                 } finally {
                     sharedContext.release();
                 }
@@ -331,11 +320,10 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
                     System.err.println("multisample:   " + hasARBMultisample);
                     System.err.println("pbuffer:       " + hasARBPBuffer);
                     System.err.println("readDrawable:  " + hasARBReadDrawableAvailable);
-                    System.err.println("vendor:        " + vendor);
                 }
-                return new SharedResource(sharedDevice, absScreen, sharedDrawable, sharedContext, 
+                return new SharedResource(sharedDevice, absScreen, sharedDrawable, sharedContext,
                                           hasARBPixelFormat, hasARBMultisample,
-                                          hasARBPBuffer, hasARBReadDrawableAvailable, vendor);
+                                          hasARBPBuffer, hasARBReadDrawableAvailable);
             } catch (Throwable t) {
                 throw new GLException("WindowsWGLDrawableFactory - Could not initialize shared resources for "+connection, t);
             } finally {
@@ -343,6 +331,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
             }
         }
 
+        @Override
         public void releaseSharedResource(SharedResourceRunner.Resource shared) {
             SharedResource sr = (SharedResource) shared;
             if (DEBUG) {
@@ -359,7 +348,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
             }
 
             if (null != sr.drawable) {
-                sr.drawable.destroy();
+                sr.drawable.setRealized(false);
                 sr.drawable = null;
             }
 
@@ -374,10 +363,12 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
         }
   }
 
+  @Override
   public final AbstractGraphicsDevice getDefaultDevice() {
       return defaultDevice;
   }
 
+  @Override
   public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
       if(null!=windowsWGLDynamicLookupHelper && device instanceof WindowsGraphicsDevice) {
           return true;
@@ -385,64 +376,37 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
       return false;
   }
 
-  final static String GL_ARB_pbuffer = "GL_ARB_pbuffer";
+  final static String WGL_ARB_pbuffer      = "WGL_ARB_pbuffer";
   final static String WGL_ARB_pixel_format = "WGL_ARB_pixel_format";
   final static String WGL_ARB_multisample = "WGL_ARB_multisample";
   final static String WGL_NV_float_buffer = "WGL_NV_float_buffer";
   final static String WGL_ARB_make_current_read = "WGL_ARB_make_current_read";
   final static String wglMakeContextCurrent = "wglMakeContextCurrent";
 
+  @Override
   protected final Thread getSharedResourceThread() {
     return sharedResourceRunner.start();
   }
-  
-  protected final boolean createSharedResource(AbstractGraphicsDevice device) {
-    try {
-        SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
-        if(null!=sr) {
-          return null != sr.getContext();
-        }
-    } catch (GLException gle) {
-        if(DEBUG) {
-            System.err.println("Catched Exception while WindowsWGL Shared Resource initialization");
-            gle.printStackTrace();
-        }
-    }
-    return false;
-  }
-  
-  protected final GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device) {
-    SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
-    if(null!=sr) {
-      return sr.getContext();
-    }
-    return null;
-  }
 
-  protected AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device) {
-    SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
-    if(null!=sr) {
-        return sr.getDevice();
-    }
-    return null;
+  @Override
+  protected final SharedResource getOrCreateSharedResourceImpl(AbstractGraphicsDevice device) {
+    return (SharedResource) sharedResourceRunner.getOrCreateShared(device);
   }
 
-  protected WindowsWGLDrawable getOrCreateSharedDrawable(AbstractGraphicsDevice device) {
-    SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
+  protected final WindowsWGLDrawable getOrCreateSharedDrawable(AbstractGraphicsDevice device) {
+    SharedResourceRunner.Resource sr = getOrCreateSharedResourceImpl(device);
     if(null!=sr) {
         return (WindowsWGLDrawable) sr.getDrawable();
     }
     return null;
   }
 
-  SharedResource getOrCreateSharedResource(AbstractGraphicsDevice device) {
-    return (SharedResource) sharedResourceRunner.getOrCreateShared(device);
-  }
-
+  @Override
   protected List<GLCapabilitiesImmutable> getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
     return WindowsWGLGraphicsConfigurationFactory.getAvailableCapabilities(this, device);
   }
 
+  @Override
   protected final GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
@@ -450,6 +414,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     return new WindowsOnscreenWGLDrawable(this, target);
   }
 
+  @Override
   protected final GLDrawableImpl createOffscreenDrawableImpl(final NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
@@ -457,7 +422,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     AbstractGraphicsConfiguration config = target.getGraphicsConfiguration();
     GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
     if(!chosenCaps.isPBuffer()) {
-        return new WindowsBitmapWGLDrawable(this, target);
+        return WindowsBitmapWGLDrawable.create(this, target);
     }
 
     // PBuffer GLDrawable Creation
@@ -468,7 +433,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
      * Similar to ATI Bug https://bugzilla.mozilla.org/show_bug.cgi?id=486277,
      * we need to have a context current on the same Display to create a PBuffer.
      */
-    final SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
+    final SharedResource sr = getOrCreateSharedResourceImpl(device);
     if(null!=sr) {
         GLContext lastContext = GLContext.getCurrent();
         if (lastContext != null) {
@@ -494,46 +459,77 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
    *           and -1 if undefined yet, ie no shared device exist at this point.
    */
   public final int isReadDrawableAvailable(AbstractGraphicsDevice device) {
-    SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared((null!=device)?device:defaultDevice);
+    SharedResource sr = getOrCreateSharedResourceImpl( ( null != device ) ? device : defaultDevice );
     if(null!=sr) {
         return sr.hasReadDrawable() ? 1 : 0 ;
     }
     return -1; // undefined
   }
 
-  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
-    SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared((null!=device)?device:defaultDevice);
+  @Override
+  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
+    SharedResource sr = getOrCreateSharedResourceImpl( ( null != device ) ? device : defaultDevice );
     if(null!=sr) {
         return sr.hasARBPBuffer();
     }
     return false;
   }
 
-  protected final NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
-    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
-    WrappedSurface ns = new WrappedSurface(WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-                                     capsChosen, capsRequested, chooser, screen) );
-    ns.surfaceSizeChanged(width, height);
-    return ns;
+  @Override
+  protected final ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                        GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
+                                                        GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook) {
+    final WindowsGraphicsDevice device;
+    if(createNewDevice || !(deviceReq instanceof WindowsGraphicsDevice)) {
+        device = new WindowsGraphicsDevice(deviceReq.getConnection(), deviceReq.getUnitID());
+    } else {
+        device = (WindowsGraphicsDevice)deviceReq;
+    }
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+    final WindowsWGLGraphicsConfiguration config = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen);
+    }
+    return new WrappedSurface(config, 0, upstreamHook, createNewDevice);
+  }
+
+  @Override
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                   GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    final WindowsGraphicsDevice device;
+    if( createNewDevice || !(deviceReq instanceof WindowsGraphicsDevice) ) {
+        device = new WindowsGraphicsDevice(deviceReq.getConnection(), deviceReq.getUnitID());
+    } else {
+        device = (WindowsGraphicsDevice)deviceReq;
+    }
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+    chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(chosenCaps);
+    final WindowsWGLGraphicsConfiguration config = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(chosenCaps, requestedCaps, chooser, screen);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+chosenCaps+" on "+screen);
+    }
+    return new GDISurface(config, 0, new GDIDummyUpstreamSurfaceHook(width, height), createNewDevice);
   }
- 
-  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice adevice, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-    // FIXME device/windowHandle -> screen ?!
-    WindowsGraphicsDevice device = (WindowsGraphicsDevice) adevice;
-    AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
-    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen);    
-    GDISurface ns = new GDISurface(cfg, windowHandle);
-    return ns;
+
+  @Override
+  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final WindowsGraphicsDevice device = new WindowsGraphicsDevice(deviceReq.getConnection(), deviceReq.getUnitID());
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, screenIdx);
+    final WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen);
+    return new GDISurface(cfg, windowHandle, upstream, true);
   }
- 
+
+  @Override
   protected final GLContext createExternalGLContextImpl() {
     return WindowsExternalWGLContext.create(this, null);
   }
 
+  @Override
   public final boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
     return true;
   }
 
+  @Override
   protected final GLDrawable createExternalGLDrawableImpl() {
     return WindowsExternalWGLDrawable.create(this, null);
   }
@@ -553,25 +549,18 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     return detail;
   }
 
-  public final boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-    return false;
-  }
-
-  public final GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException {
-    throw new GLException("Unimplemented on this platform");
-  }
-
   //------------------------------------------------------
   // Gamma-related functionality
   //
 
   private static final int GAMMA_RAMP_LENGTH = 256;
 
+  @Override
   protected final int getGammaRampLength() {
     return GAMMA_RAMP_LENGTH;
   }
 
+  @Override
   protected final boolean setGammaRamp(float[] ramp) {
     short[] rampData = new short[3 * GAMMA_RAMP_LENGTH];
     for (int i = 0; i < GAMMA_RAMP_LENGTH; i++) {
@@ -587,6 +576,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     return res;
   }
 
+  @Override
   protected final Buffer getGammaRamp() {
     ShortBuffer rampData = ShortBuffer.wrap(new short[3 * GAMMA_RAMP_LENGTH]);
     long screenDC = GDI.GetDC(0);
@@ -598,6 +588,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     return rampData;
   }
 
+  @Override
   protected final void resetGammaRamp(Buffer originalGammaRamp) {
     if (originalGammaRamp == null) {
       // getGammaRamp failed earlier
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java
index a553bd4c2..6098cde7f 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,31 +20,31 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.windows.wgl;
 
 import jogamp.opengl.*;
 import java.util.*;
 
-public class WindowsWGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
+public final class WindowsWGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
     protected WindowsWGLDynamicLibraryBundleInfo() {
         super();
     }
 
     @Override
-    public List<List<String>> getToolLibNames() {
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         final List<String> libsGL = new ArrayList<String>();
         libsGL.add("OpenGL32");
-        libsList.add(libsGL);        
+        libsList.add(libsGL);
         return libsList;
     }
-    
+
     @Override
     public final List<String> getToolGetProcAddressFuncNameList() {
         List<String> res = new ArrayList<String>();
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java
index 5682b35e8..5dd9f88b2 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -33,6 +33,8 @@
 
 package jogamp.opengl.windows.wgl;
 
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -44,26 +46,27 @@ import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
-import javax.media.opengl.GLPbuffer;
 import javax.media.opengl.GLProfile;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 
 import jogamp.nativewindow.windows.DWM_BLURBEHIND;
 import jogamp.nativewindow.windows.GDI;
+import jogamp.nativewindow.windows.GDIUtil;
 import jogamp.nativewindow.windows.MARGINS;
 import jogamp.nativewindow.windows.PIXELFORMATDESCRIPTOR;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 
-public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguration implements Cloneable {    
+public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguration implements Cloneable {
     protected static final int MAX_PFORMATS = 256;
     protected static final int MAX_ATTRIBS  = 256;
 
-    private GLCapabilitiesChooser chooser;
+    private final GLCapabilitiesChooser chooser;
     private boolean isDetermined = false;
     private boolean isExternal = false;
 
-    WindowsWGLGraphicsConfiguration(AbstractGraphicsScreen screen, 
+    WindowsWGLGraphicsConfiguration(AbstractGraphicsScreen screen,
                                     GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
                                     GLCapabilitiesChooser chooser) {
         super(screen, capsChosen, capsRequested);
@@ -96,15 +99,15 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         }
         WindowsWGLDrawableFactory factory = (WindowsWGLDrawableFactory) _factory;
         AbstractGraphicsDevice device = screen.getDevice();
-        WindowsWGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResource(device);
+        WindowsWGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
         boolean hasARB = null != sharedResource && sharedResource.hasARBPixelFormat();
 
         WGLGLCapabilities caps = null;
 
         if(hasARB) {
-            caps = wglARBPFID2GLCapabilities(sharedResource, hdc, pfdID, glp, onscreen, true /* pbuffer */);
+            caps = wglARBPFID2GLCapabilities(sharedResource, device, glp, hdc, pfdID, GLGraphicsConfigurationUtil.ALL_BITS);
         } else {
-            caps = PFD2GLCapabilities(glp, hdc, pfdID, onscreen);
+            caps = PFD2GLCapabilities(device, glp, hdc, pfdID, GLGraphicsConfigurationUtil.ALL_BITS);
         }
         if(null==caps) {
             throw new GLException("Couldn't choose Capabilities by: HDC 0x"+Long.toHexString(hdc)+
@@ -116,6 +119,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         return cfg;
     }
 
+    @Override
     public Object clone() {
         return super.clone();
     }
@@ -158,19 +162,19 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         if (0 == hdc) {
             throw new GLException("Error: HDC is null");
         }
-    
+
         if (!WGLUtil.SetPixelFormat(hdc, caps.getPFDID(), caps.getPFD())) {
-            throw new GLException("Unable to set pixel format " + caps +
+            throw new GLException("Unable to set pixel format " + caps.getPFDID() + " of " + caps +
                                   " for device context " + toHexString(hdc) +
                                   ": error code " + GDI.GetLastError());
         }
-        if(!caps.isBackgroundOpaque()) {
+        if( !caps.isBackgroundOpaque() ) {
             final long hwnd = GDI.WindowFromDC(hdc);
             DWM_BLURBEHIND bb = DWM_BLURBEHIND.create();
-            bb.setDwFlags(GDI.DWM_BB_ENABLE);
-            bb.setFEnable(1);
+            bb.setDwFlags(GDI.DWM_BB_ENABLE| GDI.DWM_BB_TRANSITIONONMAXIMIZED);
+            bb.setFEnable( 1 );
             boolean ok = GDI.DwmEnableBlurBehindWindow(hwnd, bb);
-            if(ok) {
+            if( ok ) {
                 MARGINS m = MARGINS.create();
                 m.setCxLeftWidth(-1);
                 m.setCxRightWidth(-1);
@@ -179,15 +183,17 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
                 ok = GDI.DwmExtendFrameIntoClientArea(hwnd, m);
             }
             if(DEBUG) {
-                System.err.println("translucency enabled on wnd: 0x"+Long.toHexString(hwnd)+" - ok: "+ok);
+                final boolean isUndecorated = GDIUtil.IsUndecorated(hwnd);
+                final boolean isChild = GDIUtil.IsChild(hwnd);
+                System.err.println("translucency enabled on wnd: 0x"+Long.toHexString(hwnd)+" - isUndecorated "+isUndecorated+", isChild "+isChild+", ok: "+ok);
             }
         }
         if (DEBUG) {
-            System.err.println("setPixelFormat (ARB): hdc "+toHexString(hdc) +", "+caps);
+            System.err.println("setPixelFormat: hdc "+toHexString(hdc) +", "+caps);
         }
         setCapsPFD(caps);
     }
-    
+
     /**
      * Only sets this configuration's capabilities and marks it as determined,
      * the actual pixelformat is not set.
@@ -204,130 +210,120 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
      * External configuration's HDC pixelformat shall not be modified
      */
     public final boolean isExternal() { return isExternal; }
-    
+
     final void markExternal() {
         this.isExternal=true;
     }
-    
+
     /**
      * Determined configuration states set target capabilties via {@link #setCapsPFD(WGLGLCapabilities)},
      * but does not imply a set pixelformat.
-     * 
-     * @see #setPixelFormat(long, WGLGLCapabilities) 
+     *
+     * @see #setPixelFormat(long, WGLGLCapabilities)
      * @see #setCapsPFD(WGLGLCapabilities)
      */
     public final boolean isDetermined() { return isDetermined; }
-    
+
     public final PIXELFORMATDESCRIPTOR getPixelFormat()   { return isDetermined ? ((WGLGLCapabilities)capabilitiesChosen).getPFD() : null; }
     public final int getPixelFormatID() { return isDetermined ? ((WGLGLCapabilities)capabilitiesChosen).getPFDID() : 0; }
     public final boolean isChoosenByARB() { return isDetermined ? ((WGLGLCapabilities)capabilitiesChosen).isSetByARB() : false; }
 
-    static int fillAttribsForGeneralWGLARBQuery(WindowsWGLDrawableFactory.SharedResource sharedResource, int[] iattributes) {
+    static int fillAttribsForGeneralWGLARBQuery(WindowsWGLDrawableFactory.SharedResource sharedResource, IntBuffer iattributes) {
         int niattribs = 0;
-        iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_WINDOW_ARB;
+        iattributes.put(niattribs++, WGLExt.WGL_DRAW_TO_WINDOW_ARB);
         if(sharedResource.hasARBPBuffer()) {
-            iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_PBUFFER_ARB;
-        }
-        iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_BITMAP_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_ACCELERATION_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_SUPPORT_OPENGL_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_DEPTH_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_STENCIL_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_DOUBLE_BUFFER_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_STEREO_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_RED_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_GREEN_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_BLUE_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_ALPHA_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_ACCUM_RED_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_ACCUM_GREEN_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_ACCUM_BLUE_BITS_ARB;
-        iattributes[niattribs++] = WGLExt.WGL_ACCUM_ALPHA_BITS_ARB;
+            iattributes.put(niattribs++, WGLExt.WGL_DRAW_TO_PBUFFER_ARB);
+        }
+        iattributes.put(niattribs++, WGLExt.WGL_DRAW_TO_BITMAP_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_ACCELERATION_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_SUPPORT_OPENGL_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_DEPTH_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_STENCIL_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_DOUBLE_BUFFER_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_STEREO_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_PIXEL_TYPE_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_RED_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_GREEN_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_BLUE_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_ALPHA_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_ACCUM_RED_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_ACCUM_GREEN_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_ACCUM_BLUE_BITS_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_ACCUM_ALPHA_BITS_ARB);
         if(sharedResource.hasARBMultisample()) {
-            iattributes[niattribs++] = WGLExt.WGL_SAMPLE_BUFFERS_ARB;
-            iattributes[niattribs++] = WGLExt.WGL_SAMPLES_ARB;
-        }
-            
-        if(sharedResource.hasARBPBuffer()) {
-            WindowsWGLContext sharedCtx = sharedResource.getContext();
-            if(null != sharedCtx && sharedCtx.isExtensionAvailable(WindowsWGLDrawableFactory.WGL_NV_float_buffer)) {
-                // pbo float buffer
-                iattributes[niattribs++] = WGLExt.WGL_FLOAT_COMPONENTS_NV; // nvidia
-            }
+            iattributes.put(niattribs++, WGLExt.WGL_SAMPLE_BUFFERS_ARB);
+            iattributes.put(niattribs++, WGLExt.WGL_SAMPLES_ARB);
         }
-
         return niattribs;
     }
-    
+
     static boolean wglARBPFIDValid(WindowsWGLContext sharedCtx, long hdc, int pfdID) {
-        int[] in = new int[1];
-        int[] out = new int[1];
-        in[0] = WGLExt.WGL_COLOR_BITS_ARB;
-        if (!sharedCtx.getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdID, 0, 1, in, 0, out, 0)) {
+        final IntBuffer out = Buffers.newDirectIntBuffer(1);
+        final IntBuffer in = Buffers.newDirectIntBuffer(1);
+        in.put(0, WGLExt.WGL_COLOR_BITS_ARB);
+        if (!sharedCtx.getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdID, 0, 1, in, out)) {
             // Some GPU's falsely fails with a zero error code (success)
             return GDI.GetLastError() == GDI.ERROR_SUCCESS ;
         }
         return true;
     }
 
-    static int[] wglAllARBPFIDs(WindowsWGLContext sharedCtx, long hdc) {
-        int[] iattributes = new int[1];
-        int[] iresults = new int[1];
+    static int wglARBPFDIDCount(WindowsWGLContext sharedCtx, long hdc) {
+        final IntBuffer iresults = Buffers.newDirectIntBuffer(1);
+        final IntBuffer iattributes = Buffers.newDirectIntBuffer(1);
+        iattributes.put(0, WGLExt.WGL_NUMBER_PIXEL_FORMATS_ARB);
 
         WGLExt wglExt = sharedCtx.getWGLExt();
-        iattributes[0] = WGLExt.WGL_NUMBER_PIXEL_FORMATS_ARB;
-        if (!wglExt.wglGetPixelFormatAttribivARB(hdc, 0, 0, 1, iattributes, 0, iresults, 0)) {
+        // pfdID shall be ignored here (spec), however, pass a valid pdf index '1' below (possible driver bug)
+        if (!wglExt.wglGetPixelFormatAttribivARB(hdc, 1 /* pfdID */, 0, 1, iattributes, iresults)) {
             if(DEBUG) {
                 System.err.println("GetPixelFormatAttribivARB: Failed - HDC 0x" + Long.toHexString(hdc) +
+                                  ", value "+iresults.get(0)+
                                   ", LastError: " + GDI.GetLastError());
                 Thread.dumpStack();
             }
-            return null;
+            return 0;
         }
-        int numFormats = iresults[0];
-        if(0 == numFormats) {
+        final int pfdIDCount = iresults.get(0);
+        if(0 == pfdIDCount) {
             if(DEBUG) {
                 System.err.println("GetPixelFormatAttribivARB: No formats - HDC 0x" + Long.toHexString(hdc) +
                                   ", LastError: " + GDI.GetLastError());
                 Thread.dumpStack();
             }
-            return null;
         }
-        int[] pfdIDs = new int[numFormats];
-        for (int i = 0; i < numFormats; i++) {
+        return pfdIDCount;
+    }
+
+    static int[] wglAllARBPFDIDs(int pfdIDCount) {
+        int[] pfdIDs = new int[pfdIDCount];
+        for (int i = 0; i < pfdIDCount; i++) {
             pfdIDs[i] = 1 + i;
         }
         return pfdIDs;
     }
 
     static WGLGLCapabilities wglARBPFID2GLCapabilities(WindowsWGLDrawableFactory.SharedResource sharedResource,
-                                                       long hdc, int pfdID,
-                                                       GLProfile glp, boolean onscreen, boolean usePBuffer) {
+                                                       AbstractGraphicsDevice device, GLProfile glp,
+                                                       long hdc, int pfdID, int winattrbits) {
         if (!sharedResource.hasARBPixelFormat()) {
             return null;
         }
 
-        int[] iattributes = new int  [2*MAX_ATTRIBS];
-        int[] iresults    = new int  [2*MAX_ATTRIBS];
-
-        int niattribs = fillAttribsForGeneralWGLARBQuery(sharedResource, iattributes);
+        final IntBuffer iattributes = Buffers.newDirectIntBuffer(2*MAX_ATTRIBS);
+        final IntBuffer iresults = Buffers.newDirectIntBuffer(2*MAX_ATTRIBS);
+        final int niattribs = fillAttribsForGeneralWGLARBQuery(sharedResource, iattributes);
 
-        if (!sharedResource.getContext().getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdID, 0, niattribs, iattributes, 0, iresults, 0)) {
-            throw new GLException("wglARBPFID2GLCapabilities: Error getting pixel format attributes for pixel format " + pfdID + 
+        if (!((WindowsWGLContext)sharedResource.getContext()).getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdID, 0, niattribs, iattributes, iresults)) {
+            throw new GLException("wglARBPFID2GLCapabilities: Error getting pixel format attributes for pixel format " + pfdID +
                                   " of device context " + toHexString(hdc) + ", werr " + GDI.GetLastError());
         }
-        ArrayList<WGLGLCapabilities> bucket = new ArrayList<WGLGLCapabilities>(1);
-        final int winattrbits = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-        if(AttribList2GLCapabilities(bucket, glp, hdc, pfdID, iattributes, niattribs, iresults, winattrbits)) {
-            return bucket.get(0);
-        }
-        return null;
+        return AttribList2GLCapabilities(device, glp, hdc, pfdID, iattributes, niattribs, iresults, winattrbits);
     }
 
-    static int[] wglChoosePixelFormatARB(long hdc, WindowsWGLDrawableFactory.SharedResource sharedResource,
+    static int[] wglChoosePixelFormatARB(WindowsWGLDrawableFactory.SharedResource sharedResource, AbstractGraphicsDevice device,
                                          GLCapabilitiesImmutable capabilities,
-                                         int[] iattributes, int accelerationMode, float[] fattributes)
+                                         long hdc, IntBuffer iattributes, int accelerationMode, FloatBuffer fattributes)
     {
 
         if ( !WindowsWGLGraphicsConfiguration.GLCapabilities2AttribList(capabilities,
@@ -340,77 +336,83 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
             return null;
         }
 
-        int[] pformatsTmp = new int[WindowsWGLGraphicsConfiguration.MAX_PFORMATS];
-        int[] numFormatsTmp = new int[1];
-        if ( !sharedResource.getContext().getWGLExt().wglChoosePixelFormatARB(hdc, iattributes, 0,
-                                                                fattributes, 0,
-                                                                WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
-                                                                pformatsTmp, 0, numFormatsTmp, 0))
-        {
+        final WGLExt wglExt = ((WindowsWGLContext)sharedResource.getContext()).getWGLExt();
+        final IntBuffer pformatsTmp = Buffers.newDirectIntBuffer(WindowsWGLGraphicsConfiguration.MAX_PFORMATS);
+        final IntBuffer numFormatsTmp = Buffers.newDirectIntBuffer(1);
+
+        if ( !wglExt.wglChoosePixelFormatARB(hdc, iattributes, fattributes,
+                                             WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
+                                             pformatsTmp, numFormatsTmp) ) {
             if (DEBUG) {
                 System.err.println("wglChoosePixelFormatARB: wglChoosePixelFormatARB failed: " + GDI.GetLastError());
                 Thread.dumpStack();
             }
             return null;
         }
-        int numFormats = numFormatsTmp[0];
-        int[] pformats = null;
+        final int numFormats = Math.min(numFormatsTmp.get(0), WindowsWGLGraphicsConfiguration.MAX_PFORMATS);
+        final int[] pformats;
         if( 0 < numFormats ) {
             pformats = new int[numFormats];
-            System.arraycopy(pformatsTmp, 0, pformats, 0, numFormats);
+            pformatsTmp.get(pformats, 0, numFormats);
+        } else {
+            pformats = null;
         }
         if (DEBUG) {
             System.err.println("wglChoosePixelFormatARB: NumFormats (wglChoosePixelFormatARB) accelMode 0x"
                     + Integer.toHexString(accelerationMode) + ": " + numFormats);
             for (int i = 0; i < numFormats; i++) {
                 WGLGLCapabilities dbgCaps0 = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(
-                                                sharedResource, hdc, pformats[i],
-                                                capabilities.getGLProfile(), capabilities.isOnscreen(), capabilities.isPBuffer());
+                                                sharedResource, device, capabilities.getGLProfile(), hdc, pformats[i], GLGraphicsConfigurationUtil.ALL_BITS);
                 System.err.println("pixel format " + pformats[i] + " (index " + i + "): " + dbgCaps0);
             }
         }
         return pformats;
     }
 
-    static List /*<GLCapabilitiesImmutable>*/ wglARBPFIDs2GLCapabilities(WindowsWGLDrawableFactory.SharedResource sharedResource,
-                                                                         long hdc, int[] pfdIDs, GLProfile glp, boolean onscreen, boolean usePBuffer) {
-        final int winattrbits = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-        return wglARBPFIDs2GLCapabilitiesImpl(sharedResource, hdc, pfdIDs, glp, winattrbits);
-    }
-
-    static List /*<GLCapabilitiesImmutable>*/ wglARBPFIDs2AllGLCapabilities(WindowsWGLDrawableFactory.SharedResource sharedResource,
-                                                                            long hdc, int[] pfdIDs, GLProfile glp) {
-        return wglARBPFIDs2GLCapabilitiesImpl(sharedResource, hdc, pfdIDs, glp, GLGraphicsConfigurationUtil.ALL_BITS);
-    }
-    
-    private static List /*<GLCapabilitiesImmutable>*/ wglARBPFIDs2GLCapabilitiesImpl(WindowsWGLDrawableFactory.SharedResource sharedResource,
-                                                                                     long hdc, int[] pfdIDs, GLProfile glp, int winattrbits) {
+    static List <GLCapabilitiesImmutable> wglARBPFIDs2GLCapabilities(WindowsWGLDrawableFactory.SharedResource sharedResource,
+                                                                     AbstractGraphicsDevice device, GLProfile glp, long hdc, int[] pfdIDs, int winattrbits, boolean onlyFirstValid) {
         if (!sharedResource.hasARBPixelFormat()) {
             return null;
         }
         final int numFormats = pfdIDs.length;
 
-        int[] iattributes = new int [2*MAX_ATTRIBS];
-        int[] iresults    = new int [2*MAX_ATTRIBS];
-        int niattribs = fillAttribsForGeneralWGLARBQuery(sharedResource, iattributes);
+        final IntBuffer iattributes = Buffers.newDirectIntBuffer(2*MAX_ATTRIBS);
+        final IntBuffer iresults = Buffers.newDirectIntBuffer(2*MAX_ATTRIBS);
+        final int niattribs = fillAttribsForGeneralWGLARBQuery(sharedResource, iattributes);
 
         ArrayList<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>();
 
         for(int i = 0; i<numFormats; i++) {
             if ( pfdIDs[i] >= 1 &&
-                 sharedResource.getContext().getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdIDs[i], 0, niattribs, iattributes, 0, iresults, 0) ) {
-                AttribList2GLCapabilities(bucket, glp, hdc, pfdIDs[i], iattributes, niattribs, iresults, winattrbits);
+                 ((WindowsWGLContext)sharedResource.getContext()).getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdIDs[i], 0, niattribs, iattributes, iresults) ) {
+                final GLCapabilitiesImmutable caps = AttribList2GLCapabilities(device, glp, hdc, pfdIDs[i], iattributes, niattribs, iresults, winattrbits);
+                if(null != caps) {
+                    bucket.add(caps);
+                    if(DEBUG) {
+                        final int j = bucket.size() - 1;
+                        System.err.println("wglARBPFIDs2GLCapabilities: bucket["+i+" -> "+j+"]: "+caps);
+                    }
+                    if( onlyFirstValid ) {
+                        break;
+                    }
+                } else if(DEBUG) {
+                    GLCapabilitiesImmutable skipped = AttribList2GLCapabilities(device, glp, hdc, pfdIDs[i], iattributes, niattribs, iresults, GLGraphicsConfigurationUtil.ALL_BITS);
+                    System.err.println("wglARBPFIDs2GLCapabilities: bucket["+i+" -> skip]: pfdID "+pfdIDs[i]+", "+skipped+", winattr "+GLGraphicsConfigurationUtil.winAttributeBits2String(null, winattrbits).toString());
+                }
             } else if (DEBUG) {
-                System.err.println("wglARBPFIDs2GLCapabilities: Cannot get pixel format attributes for pixel format " +
-                                   i + "/" + numFormats + ": " + pfdIDs[i] + ", " +
-                                   GLGraphicsConfigurationUtil.winAttributeBits2String(null, winattrbits).toString());
+                if( 1 > pfdIDs[i] ) {
+                    System.err.println("wglARBPFIDs2GLCapabilities: Invalid pfdID " + i + "/" + numFormats + ": " + pfdIDs[i]);
+                } else {
+                    System.err.println("wglARBPFIDs2GLCapabilities: Cannot get pixel format attributes for pixel format " +
+                                       i + "/" + numFormats + ": " + pfdIDs[i] + ", hdc " + toHexString(hdc));
+                }
             }
         }
         return bucket;
     }
 
     static boolean GLCapabilities2AttribList(GLCapabilitiesImmutable caps,
-                                             int[] iattributes,
+                                             IntBuffer iattributes,
                                              WindowsWGLDrawableFactory.SharedResource sharedResource,
                                              int accelerationValue,
                                              int[] floatMode) throws GLException {
@@ -418,212 +420,145 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
           return false;
         }
 
-        boolean onscreen = caps.isOnscreen();
-        boolean pbuffer = caps.isPBuffer();
-
         int niattribs = 0;
 
-        iattributes[niattribs++] = WGLExt.WGL_SUPPORT_OPENGL_ARB;
-        iattributes[niattribs++] = GL.GL_TRUE;
+        iattributes.put(niattribs++, WGLExt.WGL_SUPPORT_OPENGL_ARB);
+        iattributes.put(niattribs++, GL.GL_TRUE);
         if(accelerationValue>0) {
-            iattributes[niattribs++] = WGLExt.WGL_ACCELERATION_ARB;
-            iattributes[niattribs++] = accelerationValue;
-        }
-        if (onscreen) {
-          iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_WINDOW_ARB;
-          iattributes[niattribs++] = GL.GL_TRUE;
-        } else if (pbuffer && sharedResource.hasARBPBuffer()) {
-          iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_PBUFFER_ARB;
-          iattributes[niattribs++] = GL.GL_TRUE;
+            iattributes.put(niattribs++, WGLExt.WGL_ACCELERATION_ARB);
+            iattributes.put(niattribs++, accelerationValue);
+        }
+
+        final boolean usePBuffer = caps.isPBuffer() && sharedResource.hasARBPBuffer() ;
+
+        final int surfaceType;
+        if( caps.isOnscreen() ) {
+            surfaceType = WGLExt.WGL_DRAW_TO_WINDOW_ARB;
+        } else if( caps.isFBO() ) {
+            surfaceType = WGLExt.WGL_DRAW_TO_WINDOW_ARB;  // native replacement!
+        } else if( usePBuffer ) {
+            surfaceType = WGLExt.WGL_DRAW_TO_PBUFFER_ARB;
+        } else if( caps.isBitmap() ) {
+            surfaceType = WGLExt.WGL_DRAW_TO_BITMAP_ARB;
         } else {
-          iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_BITMAP_ARB;
-          iattributes[niattribs++] = GL.GL_TRUE;
+            throw new GLException("no surface type set in caps: "+caps);
         }
+        iattributes.put(niattribs++, surfaceType);
+        iattributes.put(niattribs++, GL.GL_TRUE);
 
-        iattributes[niattribs++] = WGLExt.WGL_DOUBLE_BUFFER_ARB;
+        iattributes.put(niattribs++, WGLExt.WGL_DOUBLE_BUFFER_ARB);
         if (caps.getDoubleBuffered()) {
-          iattributes[niattribs++] = GL.GL_TRUE;
+          iattributes.put(niattribs++, GL.GL_TRUE);
         } else {
-          iattributes[niattribs++] = GL.GL_FALSE;
+          iattributes.put(niattribs++, GL.GL_FALSE);
         }
 
-        iattributes[niattribs++] = WGLExt.WGL_STEREO_ARB;
+        iattributes.put(niattribs++, WGLExt.WGL_STEREO_ARB);
         if (caps.getStereo()) {
-          iattributes[niattribs++] = GL.GL_TRUE;
+          iattributes.put(niattribs++, GL.GL_TRUE);
         } else {
-          iattributes[niattribs++] = GL.GL_FALSE;
-        }
-        
-        iattributes[niattribs++] = WGLExt.WGL_RED_BITS_ARB;
-        iattributes[niattribs++] = caps.getRedBits();
-        iattributes[niattribs++] = WGLExt.WGL_GREEN_BITS_ARB;
-        iattributes[niattribs++] = caps.getGreenBits();
-        iattributes[niattribs++] = WGLExt.WGL_BLUE_BITS_ARB;
-        iattributes[niattribs++] = caps.getBlueBits();
+          iattributes.put(niattribs++, GL.GL_FALSE);
+        }
+
+        iattributes.put(niattribs++, WGLExt.WGL_RED_BITS_ARB);
+        iattributes.put(niattribs++, caps.getRedBits());
+        iattributes.put(niattribs++, WGLExt.WGL_GREEN_BITS_ARB);
+        iattributes.put(niattribs++, caps.getGreenBits());
+        iattributes.put(niattribs++, WGLExt.WGL_BLUE_BITS_ARB);
+        iattributes.put(niattribs++, caps.getBlueBits());
         if(caps.getAlphaBits()>0) {
-            iattributes[niattribs++] = WGLExt.WGL_ALPHA_BITS_ARB;
-            iattributes[niattribs++] = caps.getAlphaBits();
+            iattributes.put(niattribs++, WGLExt.WGL_ALPHA_BITS_ARB);
+            iattributes.put(niattribs++, caps.getAlphaBits());
         }
         if(caps.getStencilBits()>0) {
-            iattributes[niattribs++] = WGLExt.WGL_STENCIL_BITS_ARB;
-            iattributes[niattribs++] = caps.getStencilBits();
+            iattributes.put(niattribs++, WGLExt.WGL_STENCIL_BITS_ARB);
+            iattributes.put(niattribs++, caps.getStencilBits());
         }
-        iattributes[niattribs++] = WGLExt.WGL_DEPTH_BITS_ARB;
-        iattributes[niattribs++] = caps.getDepthBits();
+        iattributes.put(niattribs++, WGLExt.WGL_DEPTH_BITS_ARB);
+        iattributes.put(niattribs++, caps.getDepthBits());
         if (caps.getAccumRedBits()   > 0 ||
             caps.getAccumGreenBits() > 0 ||
             caps.getAccumBlueBits()  > 0 ||
             caps.getAccumAlphaBits() > 0) {
-          iattributes[niattribs++] = WGLExt.WGL_ACCUM_BITS_ARB;
-          iattributes[niattribs++] = (caps.getAccumRedBits() +
-                                      caps.getAccumGreenBits() +
-                                      caps.getAccumBlueBits() +
-                                      caps.getAccumAlphaBits());
-          iattributes[niattribs++] = WGLExt.WGL_ACCUM_RED_BITS_ARB;
-          iattributes[niattribs++] = caps.getAccumRedBits();
-          iattributes[niattribs++] = WGLExt.WGL_ACCUM_GREEN_BITS_ARB;
-          iattributes[niattribs++] = caps.getAccumGreenBits();
-          iattributes[niattribs++] = WGLExt.WGL_ACCUM_BLUE_BITS_ARB;
-          iattributes[niattribs++] = caps.getAccumBlueBits();
-          iattributes[niattribs++] = WGLExt.WGL_ACCUM_ALPHA_BITS_ARB;
-          iattributes[niattribs++] = caps.getAccumAlphaBits();
+          iattributes.put(niattribs++, WGLExt.WGL_ACCUM_BITS_ARB);
+          iattributes.put(niattribs++, ( caps.getAccumRedBits() +
+                                         caps.getAccumGreenBits() +
+                                         caps.getAccumBlueBits() +
+                                         caps.getAccumAlphaBits() ) );
+          iattributes.put(niattribs++, WGLExt.WGL_ACCUM_RED_BITS_ARB);
+          iattributes.put(niattribs++, caps.getAccumRedBits());
+          iattributes.put(niattribs++, WGLExt.WGL_ACCUM_GREEN_BITS_ARB);
+          iattributes.put(niattribs++, caps.getAccumGreenBits());
+          iattributes.put(niattribs++, WGLExt.WGL_ACCUM_BLUE_BITS_ARB);
+          iattributes.put(niattribs++, caps.getAccumBlueBits());
+          iattributes.put(niattribs++, WGLExt.WGL_ACCUM_ALPHA_BITS_ARB);
+          iattributes.put(niattribs++, caps.getAccumAlphaBits());
         }
 
         if (caps.getSampleBuffers() && sharedResource.hasARBMultisample()) {
-            iattributes[niattribs++] = WGLExt.WGL_SAMPLE_BUFFERS_ARB;
-            iattributes[niattribs++] = GL.GL_TRUE;
-            iattributes[niattribs++] = WGLExt.WGL_SAMPLES_ARB;
-            iattributes[niattribs++] = caps.getNumSamples();
-        }
-
-        boolean rtt      = caps.getPbufferRenderToTexture();
-        boolean rect     = caps.getPbufferRenderToTextureRectangle();
-        boolean useFloat = caps.getPbufferFloatingPointBuffers();
-        boolean ati      = false;
-        boolean nvidia   = false;
-        if (pbuffer && sharedResource.hasARBPBuffer()) {
-          // Check some invariants and set up some state
-          if (rect && !rtt) {
-            throw new GLException("Render-to-texture-rectangle requires render-to-texture to be specified");
-          }
-
-          WindowsWGLContext sharedCtx = sharedResource.getContext();
-          if (rect) {
-            if (!sharedCtx.isExtensionAvailable("GL_NV_texture_rectangle")) {
-              throw new GLException("Render-to-texture-rectangle requires GL_NV_texture_rectangle extension");
-            }
-          }
-
-          if (useFloat) {
-            // Prefer NVidia extension over ATI
-            nvidia = sharedCtx.isExtensionAvailable(WindowsWGLDrawableFactory.WGL_NV_float_buffer);
-            if(nvidia) {
-              floatMode[0] = GLPbuffer.NV_FLOAT;
-            } else {
-                ati = sharedCtx.isExtensionAvailable("WGL_ATI_pixel_format_float");
-                if(ati) {
-                    floatMode[0] = GLPbuffer.ATI_FLOAT;
-                } else {
-                    throw new GLException("Floating-point pbuffers not supported by this hardware");                    
-                }
-            }
-            
-            if (DEBUG) {
-              System.err.println("Using " + (ati ? "ATI" : ( nvidia ? "NVidia" : "NONE" ) ) + " floating-point extension");
-            }
-          }
-
-          // See whether we need to change the pixel type to support ATI's
-          // floating-point pbuffers
-          if (useFloat && ati) {
-            if (rtt) {
-              throw new GLException("Render-to-floating-point-texture not supported on ATI hardware");
-            } else {
-              iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE_ARB;
-              iattributes[niattribs++] = WGLExt.WGL_TYPE_RGBA_FLOAT_ARB;
-            }
-          } else {
-            if (!rtt) {
-              // Currently we don't support non-truecolor visuals in the
-              // GLCapabilities, so we don't offer the option of making
-              // color-index pbuffers.
-              iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE_ARB;
-              iattributes[niattribs++] = WGLExt.WGL_TYPE_RGBA_ARB;
-            }
-          }
-
-          if (useFloat && nvidia) {
-            iattributes[niattribs++] = WGLExt.WGL_FLOAT_COMPONENTS_NV;
-            iattributes[niattribs++] = GL.GL_TRUE;
-          }
-
-          if (rtt) {
-            if (useFloat) {
-              assert(!ati);
-              assert(nvidia);
-              if (!rect) {
-                throw new GLException("Render-to-floating-point-texture only supported on NVidia hardware with render-to-texture-rectangle");
-              }
-              iattributes[niattribs++] = WGLExt.WGL_BIND_TO_TEXTURE_RECTANGLE_FLOAT_RGB_NV;
-              iattributes[niattribs++] = GL.GL_TRUE;
-            } else {
-              iattributes[niattribs++] = rect ? WGLExt.WGL_BIND_TO_TEXTURE_RECTANGLE_RGB_NV : WGLExt.WGL_BIND_TO_TEXTURE_RGB_ARB;
-              iattributes[niattribs++] = GL.GL_TRUE;
-            }
-          }
-        } else {
-          iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE_ARB;
-          iattributes[niattribs++] = WGLExt.WGL_TYPE_RGBA_ARB;
+            iattributes.put(niattribs++, WGLExt.WGL_SAMPLE_BUFFERS_ARB);
+            iattributes.put(niattribs++, GL.GL_TRUE);
+            iattributes.put(niattribs++, WGLExt.WGL_SAMPLES_ARB);
+            iattributes.put(niattribs++, caps.getNumSamples());
         }
-        iattributes[niattribs++] = 0;
+
+        iattributes.put(niattribs++, WGLExt.WGL_PIXEL_TYPE_ARB);
+        iattributes.put(niattribs++, WGLExt.WGL_TYPE_RGBA_ARB);
+        iattributes.put(niattribs++, 0);
 
         return true;
     }
 
-    static int AttribList2DrawableTypeBits(final int[] iattribs, final int niattribs, final int[] iresults) {
+    static int AttribList2DrawableTypeBits(final IntBuffer iattribs,
+                                           final int niattribs, final IntBuffer iresults) {
         int val = 0;
 
         for (int i = 0; i < niattribs; i++) {
-          int attr = iattribs[i];
+          final int attr = iattribs.get(i);
           switch (attr) {
             case WGLExt.WGL_DRAW_TO_WINDOW_ARB:
-                if(iresults[i] == GL.GL_TRUE) val |= GLGraphicsConfigurationUtil.WINDOW_BIT;
+                if(iresults.get(i) == GL.GL_TRUE) {
+                    val |= GLGraphicsConfigurationUtil.WINDOW_BIT |
+                           GLGraphicsConfigurationUtil.FBO_BIT;
+                }
                 break;
             case WGLExt.WGL_DRAW_TO_BITMAP_ARB:
-                if(iresults[i] == GL.GL_TRUE) val |= GLGraphicsConfigurationUtil.BITMAP_BIT;
+                if(iresults.get(i) == GL.GL_TRUE) {
+                    val |= GLGraphicsConfigurationUtil.BITMAP_BIT;
+                }
                 break;
             case WGLExt.WGL_DRAW_TO_PBUFFER_ARB:
-                if(iresults[i] == GL.GL_TRUE) val |= GLGraphicsConfigurationUtil.PBUFFER_BIT;
+                if(iresults.get(i) == GL.GL_TRUE) {
+                    val |= GLGraphicsConfigurationUtil.PBUFFER_BIT;
+                }
                 break;
             }
         }
         return val;
     }
 
-    static boolean AttribList2GLCapabilities( ArrayList<? extends GLCapabilitiesImmutable> capsBucket,
-                                              final GLProfile glp, final long hdc, final int pfdID, final int[] iattribs,
-                                              final int niattribs,
-                                              final int[] iresults, final int winattrmask) {
+    static WGLGLCapabilities AttribList2GLCapabilities(final AbstractGraphicsDevice device,
+                                                       final GLProfile glp, final long hdc, final int pfdID,
+                                                       final IntBuffer iattribs, final int niattribs, IntBuffer iresults, final int winattrmask) {
         final int allDrawableTypeBits = AttribList2DrawableTypeBits(iattribs, niattribs, iresults);
         int drawableTypeBits = winattrmask & allDrawableTypeBits;
 
         if( 0 == drawableTypeBits ) {
-            return false;
+            return null;
         }
         PIXELFORMATDESCRIPTOR pfd = createPixelFormatDescriptor();
 
         if (WGLUtil.DescribePixelFormat(hdc, pfdID, PIXELFORMATDESCRIPTOR.size(), pfd) == 0) {
             // remove displayable bits, since pfdID is non displayable
-            drawableTypeBits = drawableTypeBits & ~(GLGraphicsConfigurationUtil.WINDOW_BIT | GLGraphicsConfigurationUtil.BITMAP_BIT);
+            drawableTypeBits = drawableTypeBits & ~(GLGraphicsConfigurationUtil.WINDOW_BIT | GLGraphicsConfigurationUtil.BITMAP_BIT | GLGraphicsConfigurationUtil.FBO_BIT );
             if( 0 == drawableTypeBits ) {
-                return false;
+                return null;
             }
             // non displayable requested (pbuffer)
         }
-        WGLGLCapabilities res = new WGLGLCapabilities(pfd, pfdID, glp);
+        final WGLGLCapabilities res = new WGLGLCapabilities(pfd, pfdID, glp);
         res.setValuesByARB(iattribs, niattribs, iresults);
-
-        return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, res, drawableTypeBits );
+        return (WGLGLCapabilities) GLGraphicsConfigurationUtil.fixWinAttribBitsAndHwAccel(device, drawableTypeBits, res);
     }
 
     //
@@ -649,7 +584,8 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         int dwFlags = pfd.getDwFlags();
 
         if( 0 != (GDI.PFD_DRAW_TO_WINDOW & dwFlags ) ) {
-            val |= GLGraphicsConfigurationUtil.WINDOW_BIT;
+            val |= GLGraphicsConfigurationUtil.WINDOW_BIT |
+                   GLGraphicsConfigurationUtil.FBO_BIT;
         }
         if( 0 != (GDI.PFD_DRAW_TO_BITMAP & dwFlags ) ) {
             val |= GLGraphicsConfigurationUtil.BITMAP_BIT;
@@ -657,107 +593,138 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         return val;
     }
 
-    static WGLGLCapabilities PFD2GLCapabilities(GLProfile glp, long hdc, int pfdID, boolean onscreen) {
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, false);
-        ArrayList<WGLGLCapabilities> capsBucket = new ArrayList<WGLGLCapabilities>(1);
-        if( PFD2GLCapabilities(capsBucket, glp, hdc, pfdID, winattrmask) ) {
-            return capsBucket.get(0);
-        }
-        return null;
-    }
-
-    static boolean  PFD2GLCapabilities(ArrayList<? extends GLCapabilitiesImmutable> capsBucket, final GLProfile glp, final long hdc, final int pfdID, final int winattrmask) {
+    static WGLGLCapabilities PFD2GLCapabilities(AbstractGraphicsDevice device, final GLProfile glp, final long hdc, final int pfdID, final int winattrmask) {
         PIXELFORMATDESCRIPTOR pfd = createPixelFormatDescriptor(hdc, pfdID);
         if(null == pfd) {
-            return false;
+            return null;
         }
-        if ((pfd.getDwFlags() & GDI.PFD_SUPPORT_OPENGL) == 0) {
-          return false;
+        if ( (pfd.getDwFlags() & GDI.PFD_SUPPORT_OPENGL) == 0) {
+            return null;
         }
         final int allDrawableTypeBits = PFD2DrawableTypeBits(pfd);
         final int drawableTypeBits = winattrmask & allDrawableTypeBits;
 
         if( 0 == drawableTypeBits ) {
-            return false;
+            if(DEBUG) {
+                System.err.println("Drop [drawableType mismatch]: " + WGLGLCapabilities.PFD2String(pfd, pfdID));
+            }
+            return null;
+        }
+        if( GLGraphicsConfigurationUtil.BITMAP_BIT == drawableTypeBits ) {
+            // BITMAP exclusive PFD SafeGuard: Only accept BITMAP compatible color formats!
+            final int pfdColorBits = pfd.getCColorBits();
+            if ( pfdColorBits != 24 || 0 < pfd.getCAlphaBits() ) { // Allowed: RGB888 && !alpha
+                if(DEBUG) {
+                    System.err.println("Drop [color bits excl BITMAP]: " + WGLGLCapabilities.PFD2String(pfd, pfdID));
+                }
+                return null;
+            }
         }
 
-        WGLGLCapabilities res = new WGLGLCapabilities(pfd, pfdID, glp);
+        final WGLGLCapabilities res = new WGLGLCapabilities(pfd, pfdID, glp);
         res.setValuesByGDI();
+        return (WGLGLCapabilities) GLGraphicsConfigurationUtil.fixWinAttribBitsAndHwAccel(device, drawableTypeBits, res);
+   }
 
-        return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, res, drawableTypeBits );
-  }
+    static WGLGLCapabilities PFD2GLCapabilitiesNoCheck(AbstractGraphicsDevice device, final GLProfile glp, final long hdc, final int pfdID) {
+        PIXELFORMATDESCRIPTOR pfd = createPixelFormatDescriptor(hdc, pfdID);
+        return PFD2GLCapabilitiesNoCheck(device, glp, pfd, pfdID);
+   }
 
-  static PIXELFORMATDESCRIPTOR GLCapabilities2PFD(GLCapabilitiesImmutable caps, PIXELFORMATDESCRIPTOR pfd) {
-    int colorDepth = (caps.getRedBits() +
-                      caps.getGreenBits() +
-                      caps.getBlueBits());
-    if (colorDepth < 15) {
-      throw new GLException("Bit depths < 15 (i.e., non-true-color) not supported");
-    }
-    int pfdFlags = (GDI.PFD_SUPPORT_OPENGL |
-                    GDI.PFD_GENERIC_ACCELERATED);
-    if (caps.getDoubleBuffered()) {
-      pfdFlags |= GDI.PFD_DOUBLEBUFFER;
-    }
-    if (caps.isOnscreen()) {
-      pfdFlags |= GDI.PFD_DRAW_TO_WINDOW;
-    } else {
-      pfdFlags |= GDI.PFD_DRAW_TO_BITMAP;
-    }
-    if (caps.getStereo()) {
-      pfdFlags |= GDI.PFD_STEREO;
-    }
-    pfd.setDwFlags(pfdFlags);
-    pfd.setIPixelType((byte) GDI.PFD_TYPE_RGBA);
-    pfd.setCColorBits((byte) colorDepth);
-    pfd.setCRedBits  ((byte) caps.getRedBits());
-    pfd.setCGreenBits((byte) caps.getGreenBits());
-    pfd.setCBlueBits ((byte) caps.getBlueBits());
-    pfd.setCAlphaBits((byte) caps.getAlphaBits());
-    int accumDepth = (caps.getAccumRedBits() +
-                      caps.getAccumGreenBits() +
-                      caps.getAccumBlueBits());
-    pfd.setCAccumBits     ((byte) accumDepth);
-    pfd.setCAccumRedBits  ((byte) caps.getAccumRedBits());
-    pfd.setCAccumGreenBits((byte) caps.getAccumGreenBits());
-    pfd.setCAccumBlueBits ((byte) caps.getAccumBlueBits());
-    pfd.setCAccumAlphaBits((byte) caps.getAccumAlphaBits());
-    pfd.setCDepthBits((byte) caps.getDepthBits());
-    pfd.setCStencilBits((byte) caps.getStencilBits());
-    pfd.setILayerType((byte) GDI.PFD_MAIN_PLANE);
-
-    // n/a with non ARB/GDI method:
-    //       multisample
-    //       opaque
-    //       pbuffer
-    return pfd;
-  }
-
-  static PIXELFORMATDESCRIPTOR createPixelFormatDescriptor(long hdc, int pfdID) {
-    PIXELFORMATDESCRIPTOR pfd = PIXELFORMATDESCRIPTOR.create();
-    pfd.setNSize((short) PIXELFORMATDESCRIPTOR.size());
-    pfd.setNVersion((short) 1);
-    if(0 != hdc && 1 <= pfdID) {
-        if (WGLUtil.DescribePixelFormat(hdc, pfdID, PIXELFORMATDESCRIPTOR.size(), pfd) == 0) {
-            // Accelerated pixel formats that are non displayable
-            if(DEBUG) {
-                System.err.println("Info: Non displayable pixel format " + pfdID + " of device context: error code " + GDI.GetLastError());
-            }
+   static WGLGLCapabilities PFD2GLCapabilitiesNoCheck(AbstractGraphicsDevice device, GLProfile glp, PIXELFORMATDESCRIPTOR pfd, int pfdID) {
+        if(null == pfd) {
             return null;
         }
-    }
-    return pfd;
-  }
-
-  static PIXELFORMATDESCRIPTOR createPixelFormatDescriptor() {
-    return createPixelFormatDescriptor(0, 0);
-  }
-  
-  public String toString() {
-    return "WindowsWGLGraphicsConfiguration["+getScreen()+", pfdID " + getPixelFormatID() + ", ARB-Choosen " + isChoosenByARB() +
-                                            ",\n\trequested " + getRequestedCapabilities() +
-                                            ",\n\tchosen    " + getChosenCapabilities() +
-                                            "]";
-  }
+        final WGLGLCapabilities res = new WGLGLCapabilities(pfd, pfdID, glp);
+        res.setValuesByGDI();
+
+        return (WGLGLCapabilities) GLGraphicsConfigurationUtil.fixWinAttribBitsAndHwAccel(device, PFD2DrawableTypeBits(pfd), res);
+   }
+
+   static PIXELFORMATDESCRIPTOR GLCapabilities2PFD(GLCapabilitiesImmutable caps, PIXELFORMATDESCRIPTOR pfd) {
+       int colorDepth = (caps.getRedBits() +
+               caps.getGreenBits() +
+               caps.getBlueBits());
+       if (colorDepth < 15) {
+           throw new GLException("Bit depths < 15 (i.e., non-true-color) not supported");
+       }
+       int pfdFlags = ( GDI.PFD_SUPPORT_OPENGL | GDI.PFD_GENERIC_ACCELERATED );
+
+       if( caps.isOnscreen() ) {
+           pfdFlags |= GDI.PFD_DRAW_TO_WINDOW;
+       } else if( caps.isFBO() ) {
+           pfdFlags |= GDI.PFD_DRAW_TO_WINDOW; // native replacement!
+       } else if( caps.isPBuffer() ) {
+           pfdFlags |= GDI.PFD_DRAW_TO_BITMAP; // pbuffer n/a, use bitmap
+       } else if( caps.isBitmap() ) {
+           pfdFlags |= GDI.PFD_DRAW_TO_BITMAP;
+       } else {
+           throw new GLException("no surface type set in caps: "+caps);
+       }
+
+       if ( caps.getDoubleBuffered() ) {
+           if( caps.isBitmap() || caps.isPBuffer() ) {
+               pfdFlags |= GDI.PFD_DOUBLEBUFFER_DONTCARE; // bitmaps probably don't have dbl buffering
+           } else {
+               pfdFlags |= GDI.PFD_DOUBLEBUFFER;
+           }
+       }
+
+       if (caps.getStereo()) {
+           pfdFlags |= GDI.PFD_STEREO;
+       }
+       pfd.setDwFlags(pfdFlags);
+       pfd.setIPixelType((byte) GDI.PFD_TYPE_RGBA);
+       pfd.setCColorBits((byte) colorDepth);
+       pfd.setCRedBits  ((byte) caps.getRedBits());
+       pfd.setCGreenBits((byte) caps.getGreenBits());
+       pfd.setCBlueBits ((byte) caps.getBlueBits());
+       pfd.setCAlphaBits((byte) caps.getAlphaBits());
+       int accumDepth = (caps.getAccumRedBits() +
+               caps.getAccumGreenBits() +
+               caps.getAccumBlueBits());
+       pfd.setCAccumBits     ((byte) accumDepth);
+       pfd.setCAccumRedBits  ((byte) caps.getAccumRedBits());
+       pfd.setCAccumGreenBits((byte) caps.getAccumGreenBits());
+       pfd.setCAccumBlueBits ((byte) caps.getAccumBlueBits());
+       pfd.setCAccumAlphaBits((byte) caps.getAccumAlphaBits());
+       pfd.setCDepthBits((byte) caps.getDepthBits());
+       pfd.setCStencilBits((byte) caps.getStencilBits());
+       pfd.setILayerType((byte) GDI.PFD_MAIN_PLANE);
+
+       // n/a with non ARB/GDI method:
+       //       multisample
+       //       opaque
+       //       pbuffer
+       return pfd;
+   }
+
+   static PIXELFORMATDESCRIPTOR createPixelFormatDescriptor(long hdc, int pfdID) {
+       PIXELFORMATDESCRIPTOR pfd = PIXELFORMATDESCRIPTOR.create();
+       pfd.setNSize((short) PIXELFORMATDESCRIPTOR.size());
+       pfd.setNVersion((short) 1);
+       if(0 != hdc && 1 <= pfdID) {
+           if (WGLUtil.DescribePixelFormat(hdc, pfdID, PIXELFORMATDESCRIPTOR.size(), pfd) == 0) {
+               // Accelerated pixel formats that are non displayable
+               if(DEBUG) {
+                   System.err.println("Info: Non displayable pixel format " + pfdID + " of device context: error code " + GDI.GetLastError());
+               }
+               return null;
+           }
+       }
+       return pfd;
+   }
+
+   static PIXELFORMATDESCRIPTOR createPixelFormatDescriptor() {
+       return createPixelFormatDescriptor(0, 0);
+   }
+
+   @Override
+   public String toString() {
+       return "WindowsWGLGraphicsConfiguration["+getScreen()+", pfdID " + getPixelFormatID() + ", ARB-Choosen " + isChoosenByARB() +
+               ",\n\trequested " + getRequestedCapabilities() +
+               ",\n\tchosen    " + getChosenCapabilities() +
+               "]";
+   }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
index 2c8c03185..969e45ed8 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -50,11 +50,17 @@ import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
+import com.jogamp.common.nio.Buffers;
+import com.jogamp.opengl.GLRendererQuirks;
+
 import jogamp.nativewindow.windows.GDI;
 import jogamp.nativewindow.windows.PIXELFORMATDESCRIPTOR;
+import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLGraphicsConfigurationFactory;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 
+import java.nio.FloatBuffer;
+import java.nio.IntBuffer;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -68,13 +74,14 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
     static VisualIDHolder.VIDComparator PfdIDComparator = new VisualIDHolder.VIDComparator(VisualIDHolder.VIDType.WIN32_PFD);
 
     static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.windows.WindowsGraphicsDevice.class, new WindowsWGLGraphicsConfigurationFactory());
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.windows.WindowsGraphicsDevice.class, GLCapabilitiesImmutable.class, new WindowsWGLGraphicsConfigurationFactory());
     }
     private WindowsWGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
-            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
 
         if (! (capsChosen instanceof GLCapabilitiesImmutable) ) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - chosen");
@@ -84,7 +91,11 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - requested");
         }
 
-        return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, chooser, absScreen);
+        if (chooser != null && !(chooser instanceof GLCapabilitiesChooser)) {
+            throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilitiesChooser objects");
+        }
+
+        return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, (GLCapabilitiesChooser)chooser, absScreen);
     }
 
     static WindowsWGLGraphicsConfiguration createDefaultGraphicsConfiguration(GLCapabilitiesImmutable caps,
@@ -94,34 +105,34 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
 
     static WindowsWGLGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
                                                                              GLCapabilitiesImmutable capsReq,
-                                                                             CapabilitiesChooser chooser,
+                                                                             GLCapabilitiesChooser chooser,
                                                                              AbstractGraphicsScreen absScreen) {
         if(null==absScreen) {
             absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
         }
-        AbstractGraphicsDevice absDevice = absScreen.getDevice();
-
-        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities(
-                capsChosen, GLDrawableFactory.getDesktopFactory().canCreateGLPbuffer(absDevice) );
-
-        return new WindowsWGLGraphicsConfiguration( absScreen, capsChosen, capsReq, (GLCapabilitiesChooser)chooser );
+        final AbstractGraphicsDevice absDevice = absScreen.getDevice();
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLDrawableFactory.getDesktopFactory(), absDevice);
+        return new WindowsWGLGraphicsConfiguration( absScreen, capsChosen, capsReq, chooser );
     }
 
     protected static List<GLCapabilitiesImmutable> getAvailableCapabilities(WindowsWGLDrawableFactory factory, AbstractGraphicsDevice device) {
-        WindowsWGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResource(device);
+        final WindowsWGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
         if(null == sharedResource) {
             throw new GLException("Shared resource for device n/a: "+device);
         }
-        WindowsWGLDrawable sharedDrawable = sharedResource.getDrawable();
-        GLCapabilitiesImmutable capsChosen = sharedDrawable.getChosenGLCapabilities();
-        WindowsWGLContext sharedContext = sharedResource.getContext();
-        List/*<GLCapabilitiesImmutable>*/ availableCaps = null;
-        
-        if ( sharedResource.needsCurrentContext4ARBPFDQueries() ) {
+        final GLDrawableImpl sharedDrawable = sharedResource.getDrawable();
+        final GLProfile glp = GLProfile.getDefault(device);
+
+        List<GLCapabilitiesImmutable> availableCaps = null;
+
+        final GLContext sharedContext;
+        if ( factory.hasRendererQuirk(device, GLRendererQuirks.NeedCurrCtx4ARBPixFmtQueries) ) {
+            sharedContext = sharedResource.getContext();
             if(GLContext.CONTEXT_NOT_CURRENT == sharedContext.makeCurrent()) {
                 throw new GLException("Could not make Shared Context current: "+device);
             }
         } else {
+            sharedContext = null;
             sharedDrawable.lockSurface();
         }
         try {
@@ -130,17 +141,21 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                 throw new GLException("Error: HDC is null");
             }
             if (sharedResource.hasARBPixelFormat()) {
-                availableCaps = getAvailableGLCapabilitiesARB(hdc, sharedResource, capsChosen.getGLProfile());
+                availableCaps = WindowsWGLGraphicsConfigurationFactory.getAvailableGLCapabilitiesARB(sharedResource, sharedResource.getDevice(), glp, hdc);
             }
-            if( null == availableCaps || availableCaps.isEmpty() ) {
-                availableCaps = getAvailableGLCapabilitiesGDI(hdc, capsChosen.getGLProfile());
+            final boolean hasARBCaps = null != availableCaps && !availableCaps.isEmpty() ;
+            final List<GLCapabilitiesImmutable> availableCapsGDI = getAvailableGLCapabilitiesGDI(device, glp, hdc, hasARBCaps);
+            if( !hasARBCaps ) {
+                availableCaps = availableCapsGDI;
+            } else {
+                availableCaps.addAll(availableCapsGDI);
             }
         } finally {
-            if ( sharedResource.needsCurrentContext4ARBPFDQueries() ) {
-                sharedContext.release();    
+            if ( null != sharedContext ) {
+                sharedContext.release();
             } else {
                 sharedDrawable.unlockSurface();
-            }            
+            }
         }
 
         if( null != availableCaps && availableCaps.size() > 1 ) {
@@ -149,17 +164,23 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
         return availableCaps;
     }
 
-    static List/*<GLCapabilitiesImmutable>*/ getAvailableGLCapabilitiesARB(long hdc, WindowsWGLDrawableFactory.SharedResource sharedResource, GLProfile glProfile) {
-        int[] pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFIDs(sharedResource.getContext(), hdc);
-        return WindowsWGLGraphicsConfiguration.wglARBPFIDs2AllGLCapabilities(sharedResource, hdc, pformats, glProfile);
+    private static List<GLCapabilitiesImmutable> getAvailableGLCapabilitiesARB(WindowsWGLDrawableFactory.SharedResource sharedResource, AbstractGraphicsDevice device, GLProfile glProfile, long hdc) {
+        final int pfdIDCount = WindowsWGLGraphicsConfiguration.wglARBPFDIDCount((WindowsWGLContext)sharedResource.getContext(), hdc);
+        final int[] pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFDIDs(pfdIDCount);
+        return WindowsWGLGraphicsConfiguration.wglARBPFIDs2GLCapabilities(sharedResource, device, glProfile, hdc, pformats,
+                GLGraphicsConfigurationUtil.ALL_BITS & ~GLGraphicsConfigurationUtil.BITMAP_BIT, false); // w/o BITMAP
     }
 
-    static List/*<GLCapabilitiesImmutable>*/ getAvailableGLCapabilitiesGDI(long hdc, GLProfile glProfile) {
+    private static List<GLCapabilitiesImmutable> getAvailableGLCapabilitiesGDI(AbstractGraphicsDevice device, GLProfile glProfile, long hdc, boolean bitmapOnly) {
         int[] pformats = WindowsWGLGraphicsConfiguration.wglAllGDIPFIDs(hdc);
         int numFormats = pformats.length;
-        ArrayList<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>(numFormats);
+        List<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>(numFormats);
         for (int i = 0; i < numFormats; i++) {
-            WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(bucket, glProfile, hdc, pformats[i], GLGraphicsConfigurationUtil.ALL_BITS);
+            final GLCapabilitiesImmutable caps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(device, glProfile, hdc, pformats[i],
+                 bitmapOnly ? GLGraphicsConfigurationUtil.BITMAP_BIT : GLGraphicsConfigurationUtil.ALL_BITS );
+            if(null != caps) {
+                bucket.add(caps);
+            }
         }
         return bucket;
     }
@@ -206,7 +227,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                                                   " for device context " + toHexString(hdc) +
                                                   ": error code " + GDI.GetLastError());
                         }
-                        set = true;                        
+                        set = true;
                     }
                     if (DEBUG) {
                         System.err.println("setPixelFormat (post): hdc "+toHexString(hdc) +", "+pfdID+" -> "+config.getPixelFormatID()+", set: "+set);
@@ -264,17 +285,24 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
             System.err.println("user chosen caps " + config.getChosenCapabilities());
         }
         AbstractGraphicsDevice device = config.getScreen().getDevice();
-        WindowsWGLDrawableFactory.SharedResource sharedResource = ((WindowsWGLDrawableFactory)factory).getOrCreateSharedResource(device);
-        WindowsWGLContext sharedContext = null;
-        if (null != sharedResource && sharedResource.needsCurrentContext4ARBPFDQueries()) {
+        WindowsWGLDrawableFactory.SharedResource sharedResource = ((WindowsWGLDrawableFactory)factory).getOrCreateSharedResourceImpl(device);
+        final GLContext sharedContext;
+        if ( factory.hasRendererQuirk(device, GLRendererQuirks.NeedCurrCtx4ARBPixFmtQueries) ) {
             sharedContext = sharedResource.getContext();
             if(GLContext.CONTEXT_NOT_CURRENT == sharedContext.makeCurrent()) {
                 throw new GLException("Could not make Shared Context current: "+device);
             }
+        } else {
+            sharedContext = null;
         }
         try {
-            if( !updateGraphicsConfigurationARB(hdc, extHDC, config, chooser, (WindowsWGLDrawableFactory)factory, pfdIDs) ) {
-                updateGraphicsConfigurationGDI(hdc, extHDC, config, chooser, pfdIDs);
+            final GLCapabilitiesImmutable capsChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+            boolean done = false;
+            if( capsChosen.getHardwareAccelerated() && !capsChosen.isBitmap() ) {
+                done = updateGraphicsConfigurationARB((WindowsWGLDrawableFactory)factory, config, chooser, hdc, extHDC, pfdIDs);
+            }
+            if( !done ) {
+                updateGraphicsConfigurationGDI(config, chooser, hdc, extHDC, pfdIDs);
             }
         } finally {
             if (null != sharedContext) {
@@ -283,10 +311,10 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
         }
     }
 
-    private static boolean updateGraphicsConfigurationARB(long hdc, boolean extHDC, WindowsWGLGraphicsConfiguration config,
-                                                          CapabilitiesChooser chooser, WindowsWGLDrawableFactory factory, int[] pformats) {
-        AbstractGraphicsDevice device = config.getScreen().getDevice();
-        WindowsWGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResource(device);
+    private static boolean updateGraphicsConfigurationARB(WindowsWGLDrawableFactory factory, WindowsWGLGraphicsConfiguration config, CapabilitiesChooser chooser,
+                                                          long hdc, boolean extHDC, int[] pformats) {
+        final AbstractGraphicsDevice device = config.getScreen().getDevice();
+        final WindowsWGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
 
         if (null == sharedResource) {
             if (DEBUG) {
@@ -301,14 +329,25 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
             return false;
         }
 
-        GLCapabilitiesImmutable capsChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-        boolean isOpaque = capsChosen.isBackgroundOpaque() && GDI.DwmIsCompositionEnabled();
-        boolean onscreen = capsChosen.isOnscreen();
-        boolean usePBuffer = capsChosen.isPBuffer();
-        GLProfile glProfile = capsChosen.getGLProfile();
-        
+        final GLCapabilitiesImmutable capsChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+        final boolean isOpaque = capsChosen.isBackgroundOpaque() && GDI.DwmIsCompositionEnabled();
+        final int winattrbits = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(capsChosen) & ~GLGraphicsConfigurationUtil.BITMAP_BIT; // w/o BITMAP
+        final GLProfile glProfile = capsChosen.getGLProfile();
+
+        final int pfdIDCount = WindowsWGLGraphicsConfiguration.wglARBPFDIDCount((WindowsWGLContext)sharedResource.getContext(), hdc);
+
         if(DEBUG) {
-            System.err.println("translucency requested: "+(!capsChosen.isBackgroundOpaque())+", compositioning enabled: "+GDI.DwmIsCompositionEnabled()+" -> translucency "+(!isOpaque));
+            System.err.println("updateGraphicsConfigurationARB: hdc "+toHexString(hdc)+", pfdIDCount(hdc) "+pfdIDCount+", capsChosen "+capsChosen+", "+GLGraphicsConfigurationUtil.winAttributeBits2String(null, winattrbits).toString());
+            System.err.println("\tisOpaque "+isOpaque+" (translucency requested: "+(!capsChosen.isBackgroundOpaque())+", compositioning enabled: "+GDI.DwmIsCompositionEnabled()+")");
+            final int pformatsNum = null != pformats ? pformats.length : -1;
+            System.err.println("\textHDC "+extHDC+", chooser "+(null!=chooser)+", pformatsNum "+pformatsNum);
+        }
+
+        if(0 >= pfdIDCount) {
+            if (DEBUG) {
+                System.err.println("updateGraphicsConfigurationARB: failed due to 0 pfdIDs for hdc "+toHexString(hdc)+" - hdc incompatible w/ ARB ext.");
+            }
+            return false;
         }
 
         WGLGLCapabilities pixelFormatCaps = null; // chosen or preset PFD ID's caps
@@ -324,29 +363,28 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                         + ", pixelformat " + presetPFDID);
             }
             pixelFormatSet = true;
-            pixelFormatCaps = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(sharedResource, hdc, presetPFDID, glProfile, onscreen, usePBuffer);
+            pixelFormatCaps = WindowsWGLGraphicsConfiguration.wglARBPFID2GLCapabilities(sharedResource, device, glProfile, hdc, presetPFDID, winattrbits);
             pixelFormatCaps = (WGLGLCapabilities) GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(pixelFormatCaps, isOpaque);
         } else {
             int recommendedIndex = -1; // recommended index
-
             if(null == pformats) {
                 // No given PFD IDs
                 //
                 // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice
-                int[] iattributes = new int[2 * WindowsWGLGraphicsConfiguration.MAX_ATTRIBS];
-                float[] fattributes = new float[1];
+                final IntBuffer iattributes = Buffers.newDirectIntBuffer(2*WindowsWGLGraphicsConfiguration.MAX_ATTRIBS);
+                final FloatBuffer fattributes = Buffers.newDirectFloatBuffer(1);
                 int accelerationMode = WGLExt.WGL_FULL_ACCELERATION_ARB;
-                pformats = WindowsWGLGraphicsConfiguration.wglChoosePixelFormatARB(hdc, sharedResource, capsChosen,
-                                                                                   iattributes, accelerationMode, fattributes);
+                pformats = WindowsWGLGraphicsConfiguration.wglChoosePixelFormatARB(sharedResource, device, capsChosen,
+                                                                                   hdc, iattributes, accelerationMode, fattributes);
                 if (null == pformats) {
                     accelerationMode = WGLExt.WGL_GENERIC_ACCELERATION_ARB;
-                    pformats = WindowsWGLGraphicsConfiguration.wglChoosePixelFormatARB(hdc, sharedResource, capsChosen,
-                                                                                       iattributes, accelerationMode, fattributes);
+                    pformats = WindowsWGLGraphicsConfiguration.wglChoosePixelFormatARB(sharedResource, device, capsChosen,
+                                                                                       hdc, iattributes, accelerationMode, fattributes);
                 }
                 if (null == pformats) {
                     accelerationMode = -1; // use what we are offered ..
-                    pformats = WindowsWGLGraphicsConfiguration.wglChoosePixelFormatARB(hdc, sharedResource, capsChosen,
-                                                                                       iattributes, accelerationMode, fattributes);
+                    pformats = WindowsWGLGraphicsConfiguration.wglChoosePixelFormatARB(sharedResource, device, capsChosen,
+                                                                                       hdc, iattributes, accelerationMode, fattributes);
                 }
                 if (null != pformats) {
                     recommendedIndex = 0;
@@ -355,7 +393,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                         System.err.println("updateGraphicsConfigurationARB: wglChoosePixelFormatARB failed with: "+capsChosen);
                     }
                     // 2nd choice: get all GLCapabilities available, no preferred recommendedIndex available
-                    pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFIDs(sharedResource.getContext(), hdc);
+                    pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFDIDs(pfdIDCount);
                     if (DEBUG) {
                         final int len = ( null != pformats ) ? pformats.length : 0;
                         System.err.println("updateGraphicsConfigurationARB: NumFormats (wglAllARBPFIDs) " + len);
@@ -369,14 +407,14 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                     return false;
                 }
             }
+            final boolean skipCapsChooser = 0 <= recommendedIndex && null == chooser && capsChosen.isBackgroundOpaque(); // fast path: skip choosing if using recommended idx and null chooser is used and if not translucent
+
+            final List<GLCapabilitiesImmutable> availableCaps =
+                    WindowsWGLGraphicsConfiguration.wglARBPFIDs2GLCapabilities(sharedResource, device, glProfile, hdc, pformats, winattrbits, skipCapsChooser /* onlyFirstValid */);
 
-            List /*<WGLGLCapabilities>*/ availableCaps =
-                WindowsWGLGraphicsConfiguration.wglARBPFIDs2GLCapabilities(sharedResource, hdc, pformats,
-                                                                           glProfile, onscreen, usePBuffer);
             if( null == availableCaps || 0 == availableCaps.size() ) {
                 if (DEBUG) {
-                    System.err.println("updateGraphicsConfigurationARB: wglARBPFIDs2GLCapabilities failed with " + pformats.length +
-                                       " pfd ids, onscreen " + onscreen + ", pbuffer " + usePBuffer);
+                    System.err.println("updateGraphicsConfigurationARB: wglARBPFIDs2GLCapabilities failed with " + pformats.length + " pfd ids");
                     Thread.dumpStack();
                 }
                 return false;
@@ -384,14 +422,19 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
 
             if (DEBUG) {
                 System.err.println("updateGraphicsConfigurationARB: " + pformats.length +
-                                   " pfd ids, onscreen " + onscreen + ", pbuffer " + usePBuffer + ", " + availableCaps.size() + " glcaps");
+                                   " pfd ids, skipCapsChooser " + skipCapsChooser + ", " + GLGraphicsConfigurationUtil.winAttributeBits2String(null, winattrbits).toString() + ", " + availableCaps.size() + " glcaps");
                 if(0 <= recommendedIndex) {
                     System.err.println("updateGraphicsConfigurationARB: Used wglChoosePixelFormatARB to recommend pixel format " +
                                        pformats[recommendedIndex] + ", idx " + recommendedIndex +", "+availableCaps.get(recommendedIndex));
                 }
             }
 
-            int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
+            final int chosenIndex;
+            if( skipCapsChooser ) {
+                chosenIndex = recommendedIndex;
+            } else {
+                chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
+            }
             if ( 0 > chosenIndex ) {
                 if (DEBUG) {
                     Thread.dumpStack();
@@ -402,12 +445,12 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
             if( null == pixelFormatCaps) {
                 throw new GLException("Null Capabilities with "+
                                       " chosen pfdID: native recommended "+ (recommendedIndex+1) +
-                                      " chosen idx "+chosenIndex);
+                                      " chosen idx "+chosenIndex+", skipCapsChooser "+skipCapsChooser);
             }
             pixelFormatCaps = (WGLGLCapabilities) GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(pixelFormatCaps, isOpaque);
             if (DEBUG) {
                 System.err.println("chosen pfdID (ARB): native recommended "+ (recommendedIndex+1) +
-                                   " chosen "+pixelFormatCaps);
+                                   " chosen "+pixelFormatCaps+", skipCapsChooser "+skipCapsChooser);
             }
         }
 
@@ -419,61 +462,121 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
         return true;
     }
 
-    private static boolean updateGraphicsConfigurationGDI(long hdc, boolean extHDC, WindowsWGLGraphicsConfiguration config,
-                                                          CapabilitiesChooser chooser, int[] pformats) {
-        GLCapabilitiesImmutable capsChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-        if(capsChosen.isPBuffer()) {
+    private static boolean updateGraphicsConfigurationGDI(WindowsWGLGraphicsConfiguration config, CapabilitiesChooser chooser, long hdc,
+                                                          boolean extHDC, int[] pformats) {
+        final GLCapabilitiesImmutable capsChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+        if( !capsChosen.isOnscreen() && capsChosen.isPBuffer() ) {
             if (DEBUG) {
                 System.err.println("updateGraphicsConfigurationGDI: no pbuffer supported on GDI: " + capsChosen);
             }
             return false;
         }
-        boolean onscreen = capsChosen.isOnscreen();
-        GLProfile glProfile = capsChosen.getGLProfile();
+        // final boolean onscreen = capsChosen.isOnscreen();
+        // final boolean useFBO = capsChosen.isFBO();
+        final GLProfile glProfile = capsChosen.getGLProfile();
+        final int winattrmask = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(capsChosen);
+
+        if(DEBUG) {
+            System.err.println("updateGraphicsConfigurationGDI: hdc "+toHexString(hdc)+", capsChosen "+capsChosen+", "+GLGraphicsConfigurationUtil.winAttributeBits2String(null, winattrmask).toString());
+            final int pformatsNum = null != pformats ? pformats.length : -1;
+            System.err.println("\textHDC "+extHDC+", chooser "+(null!=chooser)+", pformatsNum "+pformatsNum);
+        }
 
-        ArrayList<WGLGLCapabilities> availableCaps = new ArrayList<WGLGLCapabilities>();
-        int pfdID; // chosen or preset PFD ID
+        final AbstractGraphicsDevice device = config.getScreen().getDevice();
         WGLGLCapabilities pixelFormatCaps = null; // chosen or preset PFD ID's caps
         boolean pixelFormatSet = false; // indicates a preset PFD ID [caps]
-
-        if ( !extHDC && 1 <= ( pfdID = WGLUtil.GetPixelFormat(hdc) ) ) {
+        final int presetPFDID = extHDC ? -1 : WGLUtil.GetPixelFormat(hdc) ;
+        if ( 1 <= presetPFDID ) {
             // Pixelformat already set by either
             //  - a previous preselectGraphicsConfiguration() call on the same HDC,
             //  - the graphics driver, copying the HDC's pixelformat to the new one,
             //  - or the Java2D/OpenGL pipeline's configuration
             if (DEBUG) {
                 System.err.println("updateGraphicsConfigurationGDI: NOTE: pixel format already chosen for HDC: " + toHexString(hdc)
-                        + ", pixelformat " + pfdID);
+                        + ", pixelformat " + presetPFDID);
             }
             pixelFormatSet = true;
-            pixelFormatCaps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, hdc, pfdID, onscreen);
+            pixelFormatCaps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(device, glProfile, hdc, presetPFDID, winattrmask);
+            if(null == pixelFormatCaps) {
+                throw new GLException("Could not map PFD2GLCaps w/ already chosen pfdID "+presetPFDID);
+            }
         } else {
-            if(null == pformats) {
+            final boolean givenPFormats = null != pformats;
+            if( !givenPFormats ) {
                 pformats = WindowsWGLGraphicsConfiguration.wglAllGDIPFIDs(hdc);
             }
-            final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, false);
-
-            for (int i = 0; i < pformats.length; i++) {
-                WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(availableCaps, glProfile, hdc, pformats[i], winattrmask);
-            }
 
             // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice
+            final List<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
             PIXELFORMATDESCRIPTOR pfd = WindowsWGLGraphicsConfiguration.createPixelFormatDescriptor();
             pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(capsChosen, pfd);
-            pfdID = WGLUtil.ChoosePixelFormat(hdc, pfd);
+            int chosenPFDID = WGLUtil.ChoosePixelFormat(hdc, pfd);
             int recommendedIndex = -1 ;
-            if( 1 <= pfdID ) {
-                // seek index ..
-                for (recommendedIndex = availableCaps.size() - 1 ;
-                     0 <= recommendedIndex && pfdID != ((WGLGLCapabilities) availableCaps.get(recommendedIndex)).getPFDID();
-                     recommendedIndex--)
-                { /* nop */ }
+            final boolean skipCapsChooser;
+            if( 1 <= chosenPFDID ) {
+                final boolean _skipCapsChooser = null == chooser && capsChosen.isBackgroundOpaque(); // fast path: skip choosing if using recommended idx and null chooser is used and if not translucent
+                // seek index .. in all formats _or_ in given formats!
+                int chosenIdx;
+                for (chosenIdx = pformats.length - 1 ; 0 <= chosenIdx && chosenPFDID != pformats[chosenIdx]; chosenIdx--) { /* nop */ }
+                if( 0 <= chosenIdx ) {
+                    if( _skipCapsChooser ) {
+                        final WGLGLCapabilities caps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(device, glProfile, hdc, chosenPFDID, winattrmask);
+                        availableCaps.add(caps);
+                        recommendedIndex = 0;
+                        skipCapsChooser = true;
+                    } else {
+                        skipCapsChooser = false;
+                    }
+                    if( DEBUG ) {
+                        System.err.println("Chosen PFDID "+chosenPFDID+" (idx "+chosenIdx+") -> recommendedIndex "+recommendedIndex+", skipCapsChooser "+skipCapsChooser);
+                    }
+                } else {
+                    if(DEBUG) {
+                        final GLCapabilitiesImmutable reqPFDCaps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilitiesNoCheck(device, glProfile, pfd, chosenPFDID);
+                        final GLCapabilitiesImmutable chosenCaps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(device, glProfile, hdc, chosenPFDID, winattrmask);
+                        System.err.println("Chosen PFDID "+chosenPFDID+" (idx "+chosenIdx+"), but not found in available caps (use given pfdIDs "+givenPFormats+", reqPFDCaps "+reqPFDCaps+", chosenCaps: "+chosenCaps);
+                    }
+                    chosenPFDID = 0; // not found in pformats -> clear
+                    skipCapsChooser = false;
+                }
+            } else {
+                skipCapsChooser = false;
             }
-            // 2nd choice: if no preferred recommendedIndex available
             if (DEBUG) {
-                System.err.println("updateGraphicsConfigurationGDI: ChoosePixelFormat(HDC " + toHexString(hdc) + ") = " + pfdID + ", idx " + recommendedIndex + " (LastError: " + GDI.GetLastError() + ")");
+                System.err.println("updateGraphicsConfigurationGDI: ChoosePixelFormat(HDC " + toHexString(hdc) + ") = pfdID " + chosenPFDID + ", skipCapsChooser "+skipCapsChooser+", idx " + recommendedIndex + " (LastError: " + GDI.GetLastError() + ")");
+            }
+
+            if( !skipCapsChooser ) {
+                for (int i = 0; i < pformats.length; i++) {
+                    final int pfdid = pformats[i];
+                    final WGLGLCapabilities caps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(device, glProfile, hdc, pfdid, winattrmask);
+                    if(null != caps) {
+                        availableCaps.add(caps);
+                        if(DEBUG) {
+                            final int j = availableCaps.size() - 1;
+                            System.err.println("updateGraphicsConfigurationGDI: availableCaps["+i+" -> "+j+"]: "+caps);
+                        }
+                    } else if(DEBUG) {
+                        GLCapabilitiesImmutable skipped = WindowsWGLGraphicsConfiguration.PFD2GLCapabilitiesNoCheck(device, glProfile, hdc, pformats[i]);
+                        System.err.println("updateGraphicsConfigurationGDI: availableCaps["+i+" -> skip]: pfdID "+pformats[i]+", "+skipped);
+                    }
+                }
+                // seek recommendedIndex in all _or_ given formats!
+                if( 1 <= chosenPFDID && 0 > recommendedIndex) {
+                    for (recommendedIndex = availableCaps.size() - 1 ;
+                         0 <= recommendedIndex && chosenPFDID != ((WGLGLCapabilities) availableCaps.get(recommendedIndex)).getPFDID();
+                         recommendedIndex--)
+                    { /* nop */ }
+                }
+            }
+
+            // 2nd choice: if no preferred recommendedIndex available
+            final int chosenIndex;
+            if( skipCapsChooser ) {
+                chosenIndex = recommendedIndex;
+            } else {
+                chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
             }
-            int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
             if ( 0 > chosenIndex ) {
                 if (DEBUG) {
                     System.err.println("updateGraphicsConfigurationGDI: failed, return false");
@@ -481,10 +584,10 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                 }
                 return false;
             }
-            pixelFormatCaps = availableCaps.get(chosenIndex);
+            pixelFormatCaps = (WGLGLCapabilities) availableCaps.get(chosenIndex);
             if (DEBUG) {
-                System.err.println("chosen pfdID (GDI): native recommended "+ (recommendedIndex+1) +
-                                   ", caps " + pixelFormatCaps);
+                System.err.println("chosen pfdID (GDI): recommendedIndex "+recommendedIndex+" -> chosenIndex "+ chosenIndex + ", skipCapsChooser "+skipCapsChooser+", caps " + pixelFormatCaps +
+                                   " (" + WGLGLCapabilities.PFD2String(pixelFormatCaps.getPFD(), pixelFormatCaps.getPFDID()) +")");
             }
         }
 
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
index bd64b58a4..96bd0bdd0 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -63,14 +63,15 @@ import javax.media.opengl.GLDrawableFactory;
 
 public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
     public static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, new WindowsAWTWGLGraphicsConfigurationFactory());
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, GLCapabilitiesImmutable.class, new WindowsAWTWGLGraphicsConfigurationFactory());
     }
-    private WindowsAWTWGLGraphicsConfigurationFactory() {        
+    private WindowsAWTWGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         GraphicsDevice device = null;
         if (absScreen != null &&
             !(absScreen instanceof AWTGraphicsScreen)) {
@@ -105,16 +106,16 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigu
 
         WindowsGraphicsDevice winDevice = new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
         DefaultGraphicsScreen winScreen = new DefaultGraphicsScreen(winDevice, awtScreen.getIndex());
-        GraphicsConfigurationFactory configFactory = GraphicsConfigurationFactory.getFactory(winDevice);
+        GraphicsConfigurationFactory configFactory = GraphicsConfigurationFactory.getFactory(winDevice, capsChosen);
         WindowsWGLGraphicsConfiguration winConfig = (WindowsWGLGraphicsConfiguration)
                                                        configFactory.chooseGraphicsConfiguration(capsChosen,
                                                                                                  capsRequested,
-                                                                                                 chooser, winScreen);
+                                                                                                 chooser, winScreen, nativeVisualID);
         if (winConfig == null) {
             throw new GLException("Unable to choose a GraphicsConfiguration: "+capsChosen+",\n\t"+chooser+"\n\t"+winScreen);
         }
 
-        GLDrawableFactory drawableFactory = GLDrawableFactory.getFactory(((GLCapabilitiesImmutable)capsChosen).getGLProfile());        
+        GLDrawableFactory drawableFactory = GLDrawableFactory.getFactory(((GLCapabilitiesImmutable)capsChosen).getGLProfile());
         GraphicsConfiguration chosenGC = null;
 
         if ( drawableFactory instanceof WindowsWGLDrawableFactory ) {
@@ -138,7 +139,7 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigu
                 }
                 // go on ..
             }
-    
+
             if( null == chosenGC ) {
                 // 2nd Choice: Choose and match the GL Visual with AWT:
                 //   - collect all AWT PFDs
@@ -147,7 +148,7 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigu
                 // The resulting GraphicsConfiguration has to be 'forced' on the AWT native peer,
                 // ie. returned by GLCanvas's getGraphicsConfiguration() befor call by super.addNotify().
                 //
-    
+
                 // collect all available PFD IDs
                 GraphicsConfiguration[] configs = device.getConfigurations();
                 int[] pfdIDs = new int[configs.length];
@@ -171,11 +172,11 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigu
                         System.err.println("WindowsAWTWGLGraphicsConfigurationFactory: Found matching AWT PFD ID "+winConfig.getPixelFormatID()+" -> "+winConfig);
                     }
                 }
-            }                
+            }
         } else {
             chosenGC = device.getDefaultConfiguration();
         }
-        
+
         if ( null == chosenGC ) {
             throw new GLException("Unable to determine GraphicsConfiguration: "+winConfig);
         }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/GLXUtil.java b/src/jogl/classes/jogamp/opengl/x11/glx/GLXUtil.java
index 7cc2d0f2e..12e3db3bd 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/GLXUtil.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/GLXUtil.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -33,54 +33,91 @@
 
 package jogamp.opengl.x11.glx;
 
+import java.nio.IntBuffer;
+
 import javax.media.opengl.GLException;
 
 import jogamp.opengl.Debug;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.util.VersionNumber;
 import com.jogamp.nativewindow.x11.X11GraphicsDevice;
 
 public class GLXUtil {
     public static final boolean DEBUG = Debug.debug("GLXUtil");
-    
+
     public static synchronized boolean isGLXAvailableOnServer(X11GraphicsDevice x11Device) {
         if(null == x11Device) {
             throw new IllegalArgumentException("null X11GraphicsDevice");
         }
         if(0 == x11Device.getHandle()) {
             throw new IllegalArgumentException("null X11GraphicsDevice display handle");
-        }        
+        }
         boolean glXAvailable = false;
+        x11Device.lock();
         try {
-            glXAvailable = GLX.glXQueryExtension(x11Device.getHandle(), null, 0, null, 0);
-        } catch (Throwable t) { /* n/a */ }
-        return glXAvailable;        
+            glXAvailable = GLX.glXQueryExtension(x11Device.getHandle(), null, null);
+        } catch (Throwable t) { /* n/a */
+        } finally {
+            x11Device.unlock();
+        }
+        return glXAvailable;
     }
-    
-    public static VersionNumber getGLXServerVersionNumber(long display) {
-        int[] major = new int[1];
-        int[] minor = new int[1];
-        
-        if (!GLX.glXQueryVersion(display, major, 0, minor, 0)) {
-          throw new GLException("glXQueryVersion failed");
+
+    public static String getGLXClientString(X11GraphicsDevice x11Device, int name) {
+        x11Device.lock();
+        try {
+            return GLX.glXGetClientString(x11Device.getHandle(), name);
+        } finally {
+            x11Device.unlock();
+        }
+    }
+    public static String queryGLXServerString(X11GraphicsDevice x11Device, int screen_idx, int name) {
+        x11Device.lock();
+        try {
+            return GLX.glXQueryServerString(x11Device.getHandle(), screen_idx, name);
+        } finally {
+            x11Device.unlock();
+        }
+    }
+    public static String queryGLXExtensionsString(X11GraphicsDevice x11Device, int screen_idx) {
+        x11Device.lock();
+        try {
+            return GLX.glXQueryExtensionsString(x11Device.getHandle(), screen_idx);
+        } finally {
+            x11Device.unlock();
         }
+    }
 
-        // Work around bugs in ATI's Linux drivers where they report they
-        // only implement GLX version 1.2 on the server side
-        if (major[0] == 1 && minor[0] == 2) {
-          String str = GLX.glXGetClientString(display, GLX.GLX_VERSION);
-          try {
-              // e.g. "1.3"
-              major[0] = Integer.valueOf(str.substring(0, 1)).intValue();
-              minor[0] = Integer.valueOf(str.substring(2, 3)).intValue();
-          } catch (Exception e) {
-              major[0] = 1;
-              minor[0] = 2;
-          }
-        }                
-        return new VersionNumber(major[0], minor[0], 0);
+    public static VersionNumber getGLXServerVersionNumber(X11GraphicsDevice x11Device) {
+        final IntBuffer major = Buffers.newDirectIntBuffer(1);
+        final IntBuffer minor = Buffers.newDirectIntBuffer(1);
+
+        x11Device.lock();
+        try {
+            if (!GLX.glXQueryVersion(x11Device.getHandle(), major, minor)) {
+              throw new GLException("glXQueryVersion failed");
+            }
+
+            // Work around bugs in ATI's Linux drivers where they report they
+            // only implement GLX version 1.2 on the server side
+            if (major.get(0) == 1 && minor.get(0) == 2) {
+              String str = GLX.glXGetClientString(x11Device.getHandle(), GLX.GLX_VERSION);
+              try {
+                  // e.g. "1.3"
+                  major.put(0, Integer.valueOf(str.substring(0, 1)).intValue());
+                  minor.put(0, Integer.valueOf(str.substring(2, 3)).intValue());
+              } catch (Exception e) {
+                  major.put(0, 1);
+                  minor.put(0, 2);
+              }
+            }
+        } finally {
+            x11Device.unlock();
+        }
+        return new VersionNumber(major.get(0), minor.get(0), 0);
     }
-    
+
     public static boolean isMultisampleAvailable(String extensions) {
         if (extensions != null) {
             return (extensions.indexOf("GLX_ARB_multisample") >= 0);
@@ -105,8 +142,8 @@ public class GLXUtil {
     public static VersionNumber getClientVersionNumber() {
         return clientVersionNumber;
     }
-    
-    public static synchronized void initGLXClientDataSingleton(X11GraphicsDevice x11Device) { 
+
+    public static synchronized void initGLXClientDataSingleton(X11GraphicsDevice x11Device) {
         if(null != clientVendorName) {
             return; // already initialized
         }
@@ -115,10 +152,10 @@ public class GLXUtil {
         }
         if(0 == x11Device.getHandle()) {
             throw new IllegalArgumentException("null X11GraphicsDevice display handle");
-        }        
+        }
         clientMultisampleAvailable = isMultisampleAvailable(GLX.glXGetClientString(x11Device.getHandle(), GLX.GLX_EXTENSIONS));
         clientVendorName = GLX.glXGetClientString(x11Device.getHandle(), GLX.GLX_VENDOR);
-        
+
         int[] major = new int[1];
         int[] minor = new int[1];
         final String str = GLX.glXGetClientString(x11Device.getHandle(), GLX.GLX_VERSION);
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11DummyGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11DummyGLXDrawable.java
deleted file mode 100644
index a1039e552..000000000
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11DummyGLXDrawable.java
+++ /dev/null
@@ -1,93 +0,0 @@
-/**
- * Copyright 2010 JogAmp Community. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification, are
- * permitted provided that the following conditions are met:
- * 
- *    1. Redistributions of source code must retain the above copyright notice, this list of
- *       conditions and the following disclaimer.
- * 
- *    2. Redistributions in binary form must reproduce the above copyright notice, this list
- *       of conditions and the following disclaimer in the documentation and/or other materials
- *       provided with the distribution.
- * 
- * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
- * The views and conclusions contained in the software and documentation are those of the
- * authors and should not be interpreted as representing official policies, either expressed
- * or implied, of JogAmp Community.
- */
- 
-package jogamp.opengl.x11.glx;
-
-import javax.media.opengl.*;
-
-import com.jogamp.nativewindow.WrappedSurface;
-import com.jogamp.nativewindow.x11.X11GraphicsDevice;
-import com.jogamp.nativewindow.x11.X11GraphicsScreen;
-
-import jogamp.nativewindow.*;
-import jogamp.nativewindow.x11.*;
-
-public class X11DummyGLXDrawable extends X11OnscreenGLXDrawable {
-  private static final int f_dim = 64;
-  private long dummyWindow = 0;
-
-  /** 
-   * Due to the ATI Bug https://bugzilla.mozilla.org/show_bug.cgi?id=486277,
-   * we cannot switch the Display as we please, 
-   * hence we reuse the target's screen configuration. 
-   */
-  public X11DummyGLXDrawable(X11GraphicsScreen screen, GLDrawableFactory factory, GLCapabilitiesImmutable caps) {
-    super(factory, 
-          new WrappedSurface(X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-            caps, caps, null, screen)));
-    this.realized = true;
-
-    WrappedSurface ns = (WrappedSurface) getNativeSurface();
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)ns.getGraphicsConfiguration();
-
-    X11GraphicsDevice device = (X11GraphicsDevice) screen.getDevice();
-    long dpy = device.getHandle();
-    int scrn = screen.getIndex();
-    int visualID = config.getXVisualID();
-
-    dummyWindow = X11Lib.CreateDummyWindow(dpy, scrn, visualID, f_dim, f_dim);
-    ns.setSurfaceHandle( dummyWindow );
-    ns.surfaceSizeChanged(f_dim, f_dim);
-
-    updateHandle();
-  }
-
-  public static X11DummyGLXDrawable create(X11GraphicsScreen screen, GLDrawableFactory factory, GLProfile glp) {
-      GLCapabilities caps = new GLCapabilities(glp);
-      return new X11DummyGLXDrawable(screen, factory, caps);
-  }
-
-  public void setSize(int width, int height) {
-  }
-
-  public int getWidth() {
-    return 1;
-  }
-
-  public int getHeight() {
-    return 1;
-  }
-
-  protected void destroyImpl() {
-    if(0!=dummyWindow) {
-        destroyHandle();
-        X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)getNativeSurface().getGraphicsConfiguration();
-        X11Lib.DestroyDummyWindow(config.getScreen().getDevice().getHandle(), dummyWindow);
-    }
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
index 700b25662..ff9363ca0 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,38 +29,42 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.x11.glx;
 
+import java.nio.IntBuffer;
+
 import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.VisualIDHolder;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-import jogamp.opengl.GLContextImpl;
+import jogamp.nativewindow.WrappedSurface;
 import jogamp.opengl.GLContextShareSet;
 
-import com.jogamp.nativewindow.WrappedSurface;
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.nativewindow.x11.X11GraphicsScreen;
 
 public class X11ExternalGLXContext extends X11GLXContext {
-  private GLContext lastContext;
 
   private X11ExternalGLXContext(Drawable drawable, long ctx) {
     super(drawable, null);
     this.contextHandle = ctx;
     GLContextShareSet.contextCreated(this);
-    setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT);
+    if( !setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+        throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+    }
     getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
   }
 
@@ -77,58 +81,51 @@ public class X11ExternalGLXContext extends X11GLXContext {
     if (drawable == 0) {
       throw new GLException("Error: attempted to make an external GLDrawable without a drawable/context current");
     }
-    int[] val = new int[1];
-    GLX.glXQueryContext(display, ctx, GLX.GLX_SCREEN, val, 0);
-    X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val[0], false);
+    IntBuffer val = Buffers.newDirectIntBuffer(1);
+
+    int w, h;
+    GLX.glXQueryDrawable(display, drawable, GLX.GLX_WIDTH, val);
+    w=val.get(0);
+    GLX.glXQueryDrawable(display, drawable, GLX.GLX_HEIGHT, val);
+    h=val.get(0);
+
+    GLX.glXQueryContext(display, ctx, GLX.GLX_SCREEN, val);
+    X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val.get(0), false);
 
-    GLX.glXQueryContext(display, ctx, GLX.GLX_FBCONFIG_ID, val, 0);
+    GLX.glXQueryContext(display, ctx, GLX.GLX_FBCONFIG_ID, val);
     X11GLXGraphicsConfiguration cfg = null;
     // sometimes glXQueryContext on an external context gives us a framebuffer config ID
     // of 0, which doesn't work in a subsequent call to glXChooseFBConfig; if this happens,
     // create and use a default config (this has been observed when running on CentOS 5.5 inside
     // of VMWare Server 2.0 with the Mesa 6.5.1 drivers)
-    if( X11GLXGraphicsConfiguration.GLXFBConfigIDValid(display, x11Screen.getIndex(), val[0]) ) {
+    if( VisualIDHolder.VID_UNDEFINED == val.get(0) || !X11GLXGraphicsConfiguration.GLXFBConfigIDValid(display, x11Screen.getIndex(), val.get(0)) ) {
         GLCapabilities glcapsDefault = new GLCapabilities(GLProfile.getDefault());
-        cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(glcapsDefault, glcapsDefault, null, x11Screen);
+        cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(glcapsDefault, glcapsDefault, null, x11Screen, VisualIDHolder.VID_UNDEFINED);
         if(DEBUG) {
-            System.err.println("X11ExternalGLXContext invalid FBCONFIG_ID "+val[0]+", using default cfg: " + cfg);
+            System.err.println("X11ExternalGLXContext invalid FBCONFIG_ID "+val.get(0)+", using default cfg: " + cfg);
         }
     } else {
-        cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val[0]);
+        cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val.get(0));
     }
 
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(drawable);
+    final WrappedSurface ns = new WrappedSurface(cfg, drawable, w, h, true);
     return new X11ExternalGLXContext(new Drawable(factory, ns), ctx);
   }
 
-  protected boolean createImpl(GLContextImpl shareWith) {
+  @Override
+  protected boolean createImpl(final long shareWithHandle) {
       return true;
   }
 
-  public int makeCurrent() throws GLException {
-    // Save last context if necessary to allow external GLContexts to
-    // talk to other GLContexts created by this library
-    GLContext cur = getCurrent();
-    if (cur != null && cur != this) {
-      lastContext = cur;
-      setCurrent(null);
-    }
-    return super.makeCurrent();
-  }  
-
-  public void release() throws GLException {
-    super.release();
-    setCurrent(lastContext);
-    lastContext = null;
-  }
-
+  @Override
   protected void makeCurrentImpl() throws GLException {
   }
 
+  @Override
   protected void releaseImpl() throws GLException {
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
   }
 
@@ -138,14 +135,17 @@ public class X11ExternalGLXContext extends X11GLXContext {
       super(factory, comp, true);
     }
 
+    @Override
     public GLContext createContext(GLContext shareWith) {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getWidth() {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getHeight() {
       throw new GLException("Should not call this");
     }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java
index 4d0276163..650fd31d3 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java
@@ -1,21 +1,21 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -28,25 +28,28 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.x11.glx;
 
+import java.nio.IntBuffer;
+
 import javax.media.nativewindow.NativeSurface;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
+import jogamp.nativewindow.WrappedSurface;
 
-import com.jogamp.nativewindow.WrappedSurface;
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.nativewindow.x11.X11GraphicsScreen;
 
 
@@ -69,31 +72,30 @@ public class X11ExternalGLXDrawable extends X11GLXDrawable {
     if (drawable == 0) {
       throw new GLException("Error: attempted to make an external GLDrawable without a drawable current");
     }
-    int[] val = new int[1];
-    GLX.glXQueryContext(display, context, GLX.GLX_SCREEN, val, 0);
-    X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val[0], false);
+    IntBuffer val = Buffers.newDirectIntBuffer(1);
+
+    GLX.glXQueryContext(display, context, GLX.GLX_SCREEN, val);
+    X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val.get(0), false);
 
-    GLX.glXQueryContext(display, context, GLX.GLX_FBCONFIG_ID, val, 0);
-    X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val[0]);
+    GLX.glXQueryContext(display, context, GLX.GLX_FBCONFIG_ID, val);
+    X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val.get(0));
 
     int w, h;
-    GLX.glXQueryDrawable(display, drawable, GLX.GLX_WIDTH, val, 0);
-    w=val[0];
-    GLX.glXQueryDrawable(display, drawable, GLX.GLX_HEIGHT, val, 0);
-    h=val[0];
+    GLX.glXQueryDrawable(display, drawable, GLX.GLX_WIDTH, val);
+    w=val.get(0);
+    GLX.glXQueryDrawable(display, drawable, GLX.GLX_HEIGHT, val);
+    h=val.get(0);
 
-    GLX.glXQueryContext(display, context, GLX.GLX_RENDER_TYPE, val, 0);
-    if ((val[0] & GLX.GLX_RGBA_TYPE) == 0) {
+    GLX.glXQueryContext(display, context, GLX.GLX_RENDER_TYPE, val);
+    if ((val.get(0) & GLX.GLX_RGBA_TYPE) == 0) {
       if (DEBUG) {
-        System.err.println("X11ExternalGLXDrawable: WARNING: forcing GLX_RGBA_TYPE for newly created contexts (current 0x"+Integer.toHexString(val[0])+")");
+        System.err.println("X11ExternalGLXDrawable: WARNING: forcing GLX_RGBA_TYPE for newly created contexts (current 0x"+Integer.toHexString(val.get(0))+")");
       }
     }
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(drawable);
-    ns.surfaceSizeChanged(w, h);
-    return new X11ExternalGLXDrawable(factory, ns);
+    return new X11ExternalGLXDrawable(factory, new WrappedSurface(cfg, drawable, w, h, true));
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
     return new Context(this, shareWith);
   }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLCapabilities.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLCapabilities.java
index 96d4c7713..e0b69ffd4 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLCapabilities.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLCapabilities.java
@@ -55,10 +55,12 @@ public class X11GLCapabilities extends GLCapabilities {
       this.fbcfgid = VisualIDHolder.VID_UNDEFINED;
   }
 
+  @Override
   public Object cloneMutable() {
     return clone();
   }
 
+  @Override
   public Object clone() {
     try {
       return super.clone();
@@ -86,9 +88,10 @@ public class X11GLCapabilities extends GLCapabilities {
               return getFBConfigID();
           default:
               throw new NativeWindowException("Invalid type <"+type+">");
-      }      
+      }
   }
-  
+
+  @Override
   public StringBuilder toString(StringBuilder sink) {
     if(null == sink) {
         sink = new StringBuilder();
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
index 2fd8cbcd9..94620c4fc 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -57,25 +57,32 @@ import jogamp.nativewindow.x11.X11Lib;
 import jogamp.nativewindow.x11.X11Util;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLXExtensions;
 
 import com.jogamp.common.nio.Buffers;
+import com.jogamp.common.util.VersionNumber;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.nativewindow.x11.X11GraphicsDevice;
+import com.jogamp.opengl.GLExtensions;
 
-public abstract class X11GLXContext extends GLContextImpl {
+public class X11GLXContext extends GLContextImpl {
   private static final Map<String, String> functionNameMap;
   private static final Map<String, String> extensionNameMap;
   private GLXExt _glXExt;
   // Table that holds the addresses of the native C-language entry points for
   // GLX extension functions.
   private GLXExtProcAddressTable glXExtProcAddressTable;
-  private int hasSwapIntervalSGI = 0;
+  /** 1 MESA, 2 SGI, 0 undefined, -1 none */
+  private int hasSwapInterval = 0;
   private int hasSwapGroupNV = 0;
 
   // This indicates whether the context we have created is indirect
   // and therefore requires the toolkit to be locked around all GL
   // calls rather than just all GLX calls
   protected boolean isDirect;
+  protected volatile VersionNumber glXServerVersion;
+  protected volatile boolean isGLXVersionGreaterEqualOneThree;
 
   static {
     functionNameMap = new HashMap<String, String>();
@@ -83,25 +90,28 @@ public abstract class X11GLXContext extends GLContextImpl {
     functionNameMap.put("glFreeMemoryNV", "glXFreeMemoryNV");
 
     extensionNameMap = new HashMap<String, String>();
-    extensionNameMap.put("GL_ARB_pbuffer",      "GLX_SGIX_pbuffer");
-    extensionNameMap.put("GL_ARB_pixel_format", "GLX_SGIX_pbuffer"); // good enough
+    extensionNameMap.put(GLExtensions.ARB_pbuffer,      X11GLXDrawableFactory.GLX_SGIX_pbuffer);
+    extensionNameMap.put(GLExtensions.ARB_pixel_format, X11GLXDrawableFactory.GLX_SGIX_pbuffer); // good enough
   }
 
   X11GLXContext(GLDrawableImpl drawable,
                 GLContext shareWith) {
     super(drawable, shareWith);
   }
-  
+
   @Override
-  protected void resetStates() {
+  protected void resetStates(boolean isInit) {
     // no inner state _glXExt=null;
     glXExtProcAddressTable = null;
-    hasSwapIntervalSGI = 0;
+    hasSwapInterval = 0;
     hasSwapGroupNV = 0;
     isDirect = false;
-    super.resetStates();
+    glXServerVersion = null;
+    isGLXVersionGreaterEqualOneThree = false;
+    super.resetStates(isInit);
   }
 
+  @Override
   public final ProcAddressTable getPlatformExtProcAddressTable() {
     return getGLXExtProcAddressTable();
   }
@@ -110,6 +120,7 @@ public abstract class X11GLXContext extends GLContextImpl {
     return glXExtProcAddressTable;
   }
 
+  @Override
   public Object getPlatformGLExtensions() {
     return getGLXExt();
   }
@@ -121,14 +132,29 @@ public abstract class X11GLXContext extends GLContextImpl {
     return _glXExt;
   }
 
+  @Override
   protected Map<String, String> getFunctionNameMap() { return functionNameMap; }
 
+  @Override
   protected Map<String, String> getExtensionNameMap() { return extensionNameMap; }
 
-  protected final boolean isGLXVersionGreaterEqualOneThree() {
-    return ((X11GLXDrawableFactory)drawable.getFactoryImpl()).isGLXVersionGreaterEqualOneThree(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice());      
+  protected final boolean isGLXVersionGreaterEqualOneThree() { // fast-path: use cached boolean
+    if(null != glXServerVersion) {
+        return isGLXVersionGreaterEqualOneThree;
+    }
+    glXServerVersion = ((X11GLXDrawableFactory)drawable.getFactoryImpl()).getGLXVersionNumber(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice());
+    isGLXVersionGreaterEqualOneThree = null != glXServerVersion ? glXServerVersion.compareTo(X11GLXDrawableFactory.versionOneThree) >= 0 : false;
+    return isGLXVersionGreaterEqualOneThree;
   }
-  
+  protected final void forceGLXVersionOneOne() {
+    glXServerVersion = X11GLXDrawableFactory.versionOneOne;
+    isGLXVersionGreaterEqualOneThree = false;
+    if(DEBUG) {
+        System.err.println("X11GLXContext.forceGLXVersionNumber: "+glXServerVersion);
+    }
+  }
+
+  @Override
   public final boolean isGLReadDrawableAvailable() {
     return isGLXVersionGreaterEqualOneThree();
   }
@@ -138,15 +164,17 @@ public abstract class X11GLXContext extends GLContextImpl {
 
     try {
         if ( isGLXVersionGreaterEqualOneThree() ) {
+            // System.err.println(getThreadName() +": X11GLXContext.makeCurrent: obj " + toHexString(hashCode()) + " / ctx "+toHexString(contextHandle)+": ctx "+toHexString(ctx)+", [write "+toHexString(writeDrawable)+", read "+toHexString(readDrawable)+"] - switch");
             res = GLX.glXMakeContextCurrent(dpy, writeDrawable, readDrawable, ctx);
         } else if ( writeDrawable == readDrawable ) {
+            // System.err.println(getThreadName() +": X11GLXContext.makeCurrent: obj " + toHexString(hashCode()) + " / ctx "+toHexString(contextHandle)+": ctx "+toHexString(ctx)+", [write "+toHexString(writeDrawable)+"] - switch");
             res = GLX.glXMakeCurrent(dpy, writeDrawable, ctx);
         } else {
             // should not happen due to 'isGLReadDrawableAvailable()' query in GLContextImpl
             throw new InternalError("Given readDrawable but no driver support");
         }
     } catch (RuntimeException re) {
-        if(TRACE_SWITCH) {
+        if( DEBUG_TRACE_SWITCH ) {
           System.err.println(getThreadName()+": Warning: X11GLXContext.glXMakeContextCurrent failed: "+re+", with "+
             "dpy "+toHexString(dpy)+
             ", write "+toHexString(writeDrawable)+
@@ -158,14 +186,13 @@ public abstract class X11GLXContext extends GLContextImpl {
     return res;
   }
 
+  @Override
   protected void destroyContextARBImpl(long ctx) {
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeSurface().getGraphicsConfiguration();
-    long display = config.getScreen().getDevice().getHandle();
+    final long display = drawable.getNativeSurface().getDisplayHandle();
 
     glXMakeContextCurrent(display, 0, 0, 0);
     GLX.glXDestroyContext(display, ctx);
   }
-
   private static final int ctx_arb_attribs_idx_major = 0;
   private static final int ctx_arb_attribs_idx_minor = 2;
   private static final int ctx_arb_attribs_idx_flags = 6;
@@ -178,7 +205,8 @@ public abstract class X11GLXContext extends GLContextImpl {
         /*  8 */ 0,                                 0,
         /* 10 */ 0
     };
-    
+
+  @Override
   protected long createContextARBImpl(long share, boolean direct, int ctp, int major, int minor) {
     updateGLXProcAddressTable();
     GLXExt _glXExt = getGLXExt();
@@ -197,15 +225,15 @@ public abstract class X11GLXContext extends GLContextImpl {
     IntBuffer attribs = Buffers.newDirectIntBuffer(ctx_arb_attribs_rom);
     attribs.put(ctx_arb_attribs_idx_major + 1, major);
     attribs.put(ctx_arb_attribs_idx_minor + 1, minor);
-    
+
     if ( major > 3 || major == 3 && minor >= 2  ) {
         attribs.put(ctx_arb_attribs_idx_profile + 0, GLX.GLX_CONTEXT_PROFILE_MASK_ARB);
         if( ctBwdCompat ) {
             attribs.put(ctx_arb_attribs_idx_profile + 1, GLX.GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB);
         } else {
             attribs.put(ctx_arb_attribs_idx_profile + 1, GLX.GLX_CONTEXT_CORE_PROFILE_BIT_ARB);
-        } 
-    } 
+        }
+    }
 
     if ( major >= 3 ) {
         int flags = attribs.get(ctx_arb_attribs_idx_flags + 1);
@@ -220,20 +248,21 @@ public abstract class X11GLXContext extends GLContextImpl {
 
     X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeSurface().getGraphicsConfiguration();
     AbstractGraphicsDevice device = config.getScreen().getDevice();
-    long display = device.getHandle();
+    final long display = device.getHandle();
 
     try {
         // critical path, a remote display might not support this command,
         // hence we need to catch the X11 Error within this block.
+        X11Util.setX11ErrorHandler(true, DEBUG ? false : true); // make sure X11 error handler is set
         X11Lib.XSync(display, false);
         ctx = _glXExt.glXCreateContextAttribsARB(display, config.getFBConfig(), share, direct, attribs);
-        X11Lib.XSync(display, false);
     } catch (RuntimeException re) {
         if(DEBUG) {
           Throwable t = new Throwable(getThreadName()+": Info: X11GLXContext.createContextARBImpl glXCreateContextAttribsARB failed with "+getGLVersion(major, minor, ctp, "@creation"), re);
           t.printStackTrace();
         }
     }
+
     if(0!=ctx) {
         if (!glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), ctx)) {
             if(DEBUG) {
@@ -253,54 +282,43 @@ public abstract class X11GLXContext extends GLContextImpl {
     return ctx;
   }
 
-  protected boolean createImpl(GLContextImpl shareWith) {
-      // covers the whole context creation loop incl createContextARBImpl and destroyContextARBImpl
-      X11Util.setX11ErrorHandler(true, DEBUG ? false : true);
-      try {
-          return createImplRaw(shareWith);
-      } finally {
-          X11Util.setX11ErrorHandler(false, false);
-      }
-  }
-
-  private boolean createImplRaw(GLContextImpl shareWith) {
+  @Override
+  protected boolean createImpl(final long shareWithHandle) {
     boolean direct = true; // try direct always
     isDirect = false; // fall back
 
-    X11GLXDrawableFactory factory = (X11GLXDrawableFactory)drawable.getFactoryImpl();
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeSurface().getGraphicsConfiguration();
-    AbstractGraphicsDevice device = config.getScreen().getDevice();
-    X11GLXContext sharedContext = (X11GLXContext) factory.getOrCreateSharedContextImpl(device);
+    final X11GLXDrawableFactory factory = (X11GLXDrawableFactory)drawable.getFactoryImpl();
+    final X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeSurface().getGraphicsConfiguration();
+    final AbstractGraphicsDevice device = config.getScreen().getDevice();
+    final X11GLXContext sharedContext = (X11GLXContext) factory.getOrCreateSharedContext(device);
     long display = device.getHandle();
 
-    long share = 0;
-    if (shareWith != null) {
-      share = shareWith.getHandle();
-      if (share == 0) {
-        throw new GLException("GLContextShareSet returned an invalid OpenGL context");
-      }
-      direct = GLX.glXIsDirect(display, share);
+    if ( 0 != shareWithHandle ) {
+        direct = GLX.glXIsDirect(display, shareWithHandle);
     }
 
-    GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    GLProfile glp = glCaps.getGLProfile();
+    final GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final GLProfile glp = glCaps.getGLProfile();
 
-    if(config.getFBConfigID()<0) {
-        // not able to use FBConfig
+    if( !config.hasFBConfig() ) {
+        // not able to use FBConfig -> GLX 1.1
+        forceGLXVersionOneOne();
         if(glp.isGL3()) {
           throw new GLException(getThreadName()+": Unable to create OpenGL >= 3.1 context");
         }
-        contextHandle = GLX.glXCreateContext(display, config.getXVisualInfo(), share, direct);
-        if (contextHandle == 0) {
+        contextHandle = GLX.glXCreateContext(display, config.getXVisualInfo(), shareWithHandle, direct);
+        if ( 0 == contextHandle ) {
           throw new GLException(getThreadName()+": Unable to create context(0)");
         }
-        if (!glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+        if ( !glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
           throw new GLException(getThreadName()+": Error making temp context(0) current: display "+toHexString(display)+", context "+toHexString(contextHandle)+", drawable "+drawable);
         }
-        setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT); // use GL_VERSION
+        if( !setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+            throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+        }
         isDirect = GLX.glXIsDirect(display, contextHandle);
         if (DEBUG) {
-            System.err.println(getThreadName() + ": createContextImpl: OK (old-1) share "+share+", direct "+isDirect+"/"+direct);
+            System.err.println(getThreadName() + ": createContextImpl: OK (old-1) share "+toHexString(shareWithHandle)+", direct "+isDirect+"/"+direct);
         }
         return true;
     }
@@ -308,63 +326,64 @@ public abstract class X11GLXContext extends GLContextImpl {
     boolean createContextARBTried = false;
 
     // utilize the shared context's GLXExt in case it was using the ARB method and it already exists
-    if(null!=sharedContext && sharedContext.isCreatedWithARBMethod()) {
-        contextHandle = createContextARB(share, direct);
+    if( null != sharedContext && sharedContext.isCreatedWithARBMethod() ) {
+        contextHandle = createContextARB(shareWithHandle, direct);
         createContextARBTried = true;
-        if (DEBUG && 0!=contextHandle) {
-            System.err.println(getThreadName() + ": createContextImpl: OK (ARB, using sharedContext) share "+share);
+        if ( DEBUG && 0 != contextHandle ) {
+            System.err.println(getThreadName() + ": createContextImpl: OK (ARB, using sharedContext) share "+toHexString(shareWithHandle));
         }
     }
 
-    long temp_ctx = 0;
-    if(0==contextHandle) {
+    final long temp_ctx;
+    if( 0 == contextHandle ) {
         // To use GLX_ARB_create_context, we have to make a temp context current,
         // so we are able to use GetProcAddress
-        temp_ctx = GLX.glXCreateNewContext(display, config.getFBConfig(), GLX.GLX_RGBA_TYPE, share, direct);
-        if (temp_ctx == 0) {
+        temp_ctx = GLX.glXCreateNewContext(display, config.getFBConfig(), GLX.GLX_RGBA_TYPE, shareWithHandle, direct);
+        if ( 0 == temp_ctx ) {
             throw new GLException(getThreadName()+": Unable to create temp OpenGL context(1)");
         }
-        if (!glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), temp_ctx)) {
+        if ( !glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), temp_ctx) ) {
           throw new GLException(getThreadName()+": Error making temp context(1) current: display "+toHexString(display)+", context "+toHexString(temp_ctx)+", drawable "+drawable);
         }
-        setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT); // use GL_VERSION
+        setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */); // use GL_VERSION
         glXMakeContextCurrent(display, 0, 0, 0); // release temp context
-
         if( !createContextARBTried ) {
             // is*Available calls are valid since setGLFunctionAvailability(..) was called
             final boolean isProcCreateContextAttribsARBAvailable = isFunctionAvailable("glXCreateContextAttribsARB");
             final boolean isExtARBCreateContextAvailable = isExtensionAvailable("GLX_ARB_create_context");
             if ( isProcCreateContextAttribsARBAvailable && isExtARBCreateContextAvailable ) {
                 // initial ARB context creation
-                contextHandle = createContextARB(share, direct);
+                contextHandle = createContextARB(shareWithHandle, direct);
                 createContextARBTried=true;
                 if (DEBUG) {
-                    if(0!=contextHandle) {
-                        System.err.println(getThreadName() + ": createContextImpl: OK (ARB, initial) share "+share);                        
+                    if( 0 != contextHandle ) {
+                        System.err.println(getThreadName() + ": createContextImpl: OK (ARB, initial) share "+toHexString(shareWithHandle));
                     } else {
-                        System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - creation failed - share "+share);
+                        System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - creation failed - share "+toHexString(shareWithHandle));
                     }
                 }
             } else if (DEBUG) {
-                System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - extension not available - share "+share+
+                System.err.println(getThreadName() + ": createContextImpl: NOT OK (ARB, initial) - extension not available - share "+toHexString(shareWithHandle)+
                                    ", isProcCreateContextAttribsARBAvailable "+isProcCreateContextAttribsARBAvailable+", isExtGLXARBCreateContextAvailable "+isExtARBCreateContextAvailable);
             }
         }
+    } else {
+        temp_ctx = 0;
     }
 
-    if(0!=contextHandle) {
-        if(0!=temp_ctx) {
+    if( 0 != contextHandle ) {
+        if( 0 != temp_ctx ) {
             glXMakeContextCurrent(display, 0, 0, 0);
             GLX.glXDestroyContext(display, temp_ctx);
-            if (!glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+            if ( !glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
                 throw new GLException(getThreadName()+": Cannot make previous verified context current");
             }
         }
     } else {
-        if(glp.isGL3()) {
+        if( glp.isGL3() ) {
           glXMakeContextCurrent(display, 0, 0, 0);
           GLX.glXDestroyContext(display, temp_ctx);
-          throw new GLException(getThreadName()+": X11GLXContext.createContextImpl ctx !ARB, context > GL2 requested - requested: "+glp+", current: "+getGLVersion()+", ");
+          throw new GLException(getThreadName()+": X11GLXContext.createContextImpl ctx !ARB, profile > GL2 requested (OpenGL >= 3.0.1). Requested: "+glp+", current: "+getGLVersion());
         }
         if(DEBUG) {
           System.err.println(getThreadName()+": X11GLXContext.createContextImpl failed, fall back to !ARB context "+getGLVersion());
@@ -372,53 +391,53 @@ public abstract class X11GLXContext extends GLContextImpl {
 
         // continue with temp context for GL <= 3.0
         contextHandle = temp_ctx;
-        if (!glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+        if ( !glXMakeContextCurrent(display, drawable.getHandle(), drawableRead.getHandle(), contextHandle) ) {
           glXMakeContextCurrent(display, 0, 0, 0);
           GLX.glXDestroyContext(display, temp_ctx);
           throw new GLException(getThreadName()+": Error making context(1) current: display "+toHexString(display)+", context "+toHexString(contextHandle)+", drawable "+drawable);
         }
         if (DEBUG) {
-            System.err.println(getThreadName() + ": createContextImpl: OK (old-2) share "+share);
+            System.err.println(getThreadName() + ": createContextImpl: OK (old-2) share "+toHexString(shareWithHandle));
         }
     }
     isDirect = GLX.glXIsDirect(display, contextHandle);
     if (DEBUG) {
         System.err.println(getThreadName() + ": createContextImpl: OK direct "+isDirect+"/"+direct);
     }
+
     return true;
   }
 
+  @Override
   protected void makeCurrentImpl() throws GLException {
     long dpy = drawable.getNativeSurface().getDisplayHandle();
 
     if (GLX.glXGetCurrentContext() != contextHandle) {
-        X11Util.setX11ErrorHandler(true, DEBUG ? false : true);
-        try {
-            if (!glXMakeContextCurrent(dpy, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
-                throw new GLException(getThreadName()+": Error making context current: "+this);
-            }
-        } finally {
-            X11Util.setX11ErrorHandler(false, false);
+        if (!glXMakeContextCurrent(dpy, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
+            throw new GLException("Error making context " + toHexString(contextHandle) +
+                                  " current on Thread " + getThreadName() +
+                                  " with display " + toHexString(dpy) +
+                                  ", drawableWrite " + toHexString(drawable.getHandle()) +
+                                  ", drawableRead "+ toHexString(drawableRead.getHandle()) +
+                                  " - " + this);
         }
     }
   }
 
+  @Override
   protected void releaseImpl() throws GLException {
     long display = drawable.getNativeSurface().getDisplayHandle();
-    X11Util.setX11ErrorHandler(true, DEBUG ? false : true);
-    try {
-        if (!glXMakeContextCurrent(display, 0, 0, 0)) {
-            throw new GLException(getThreadName()+": Error freeing OpenGL context");
-        }
-    } finally {
-        X11Util.setX11ErrorHandler(false, false);
+    if (!glXMakeContextCurrent(display, 0, 0, 0)) {
+        throw new GLException(getThreadName()+": Error freeing OpenGL context");
     }
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
-    GLX.glXDestroyContext(drawable.getNativeSurface().getDisplayHandle(), contextHandle);
+    destroyContextARBImpl(contextHandle);
   }
 
+  @Override
   protected void copyImpl(GLContext source, int mask) throws GLException {
     long dst = getHandle();
     long src = source.getHandle();
@@ -430,6 +449,7 @@ public abstract class X11GLXContext extends GLContextImpl {
     // Should check for X errors and raise GLException
   }
 
+  @Override
   protected final void updateGLXProcAddressTable() {
     final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
     final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
@@ -458,65 +478,78 @@ public abstract class X11GLXContext extends GLContextImpl {
     }
   }
 
+  @Override
   protected final StringBuilder getPlatformExtensionsStringImpl() {
-    StringBuilder sb = new StringBuilder();
-    if (DEBUG) {
-      System.err.println("GLX Version client version "+ GLXUtil.getClientVersionNumber()+
-                         ", server: "+         
-        ((X11GLXDrawableFactory)drawable.getFactoryImpl()).getGLXVersionNumber(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice()));
-    }
     final NativeSurface ns = drawable.getNativeSurface();
-    if(((X11GLXDrawableFactory)drawable.getFactoryImpl()).isGLXVersionGreaterEqualOneOne(ns.getGraphicsConfiguration().getScreen().getDevice())) {
-        {
-            final String ret = GLX.glXGetClientString(ns.getDisplayHandle(), GLX.GLX_EXTENSIONS);
-            if (DEBUG) {
-              System.err.println("GLX extensions (glXGetClientString): " + ret);
-            }
-            sb.append(ret).append(" ");
+    final X11GraphicsDevice x11Device = (X11GraphicsDevice) ns.getGraphicsConfiguration().getScreen().getDevice();
+    StringBuilder sb = new StringBuilder();
+    x11Device.lock();
+    try{
+        if (DEBUG) {
+          System.err.println("GLX Version client version "+ GLXUtil.getClientVersionNumber()+
+                             ", server: "+ GLXUtil.getGLXServerVersionNumber(x11Device));
         }
-        {
-            final String ret = GLX.glXQueryExtensionsString(ns.getDisplayHandle(), ns.getScreenIndex());
-            if (DEBUG) {
-              System.err.println("GLX extensions (glXQueryExtensionsString): " + ret);
+        if(((X11GLXDrawableFactory)drawable.getFactoryImpl()).isGLXVersionGreaterEqualOneOne(x11Device)) {
+            {
+                final String ret = GLX.glXGetClientString(x11Device.getHandle(), GLX.GLX_EXTENSIONS);
+                if (DEBUG) {
+                  System.err.println("GLX extensions (glXGetClientString): " + ret);
+                }
+                sb.append(ret).append(" ");
             }
-            sb.append(ret).append(" ");
-        }
-        {
-            final String ret = GLX.glXQueryServerString(ns.getDisplayHandle(), ns.getScreenIndex(), GLX.GLX_EXTENSIONS);
-            if (DEBUG) {
-              System.err.println("GLX extensions (glXQueryServerString): " + ret);
+            {
+                final String ret = GLX.glXQueryExtensionsString(x11Device.getHandle(), ns.getScreenIndex());
+                if (DEBUG) {
+                  System.err.println("GLX extensions (glXQueryExtensionsString): " + ret);
+                }
+                sb.append(ret).append(" ");
+            }
+            {
+                final String ret = GLX.glXQueryServerString(x11Device.getHandle(), ns.getScreenIndex(), GLX.GLX_EXTENSIONS);
+                if (DEBUG) {
+                  System.err.println("GLX extensions (glXQueryServerString): " + ret);
+                }
+                sb.append(ret).append(" ");
             }
-            sb.append(ret).append(" ");
         }
+    } finally {
+        x11Device.unlock();
     }
     return sb;
   }
 
-  public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals("GL_ARB_pbuffer") ||
-        glExtensionName.equals("GL_ARB_pixel_format")) {
-      return getGLDrawable().getFactory().canCreateGLPbuffer(
-          drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice() );
-    }
-    return super.isExtensionAvailable(glExtensionName);
-  }
-
   @Override
   protected boolean setSwapIntervalImpl(int interval) {
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeSurface().getGraphicsConfiguration();
-    GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    if(!glCaps.isOnscreen()) { return false; }
+    if( !drawable.getChosenGLCapabilities().isOnscreen() ) { return false; }
 
-    GLXExt glXExt = getGLXExt();
-    if(0==hasSwapIntervalSGI) {
+    final GLXExt glXExt = getGLXExt();
+    if(0==hasSwapInterval) {
         try {
-            hasSwapIntervalSGI = glXExt.isExtensionAvailable("GLX_SGI_swap_control")?1:-1;
-        } catch (Throwable t) { hasSwapIntervalSGI=1; }
+            /** Same impl. ..
+            if( glXExt.isExtensionAvailable(GLXExtensions.GLX_MESA_swap_control) ) {
+                if(DEBUG) { System.err.println("X11GLXContext.setSwapInterval using: "+GLXExtensions.GLX_MESA_swap_control); }
+                hasSwapInterval =  1;
+            } else */
+            if ( glXExt.isExtensionAvailable(GLXExtensions.GLX_SGI_swap_control) ) {
+                if(DEBUG) { System.err.println("X11GLXContext.setSwapInterval using: "+GLXExtensions.GLX_SGI_swap_control); }
+                hasSwapInterval =  2;
+            } else {
+                hasSwapInterval = -1;
+            }
+        } catch (Throwable t) { hasSwapInterval=-1; }
     }
-    if (hasSwapIntervalSGI>0) {
+    /* try {
+        switch( hasSwapInterval ) {
+            case 1:
+                return 0 == glXExt.glXSwapIntervalMESA(interval);
+            case 2:
+                return 0 == glXExt.glXSwapIntervalSGI(interval);
+        }
+    } catch (Throwable t) { hasSwapInterval = -1; } */
+    if (2 == hasSwapInterval) {
         try {
             return 0 == glXExt.glXSwapIntervalSGI(interval);
-        } catch (Throwable t) { hasSwapIntervalSGI=-1; }
+        } catch (Throwable t) { hasSwapInterval=-1; }
     }
     return false;
   }
@@ -524,15 +557,15 @@ public abstract class X11GLXContext extends GLContextImpl {
   private final int initSwapGroupImpl(GLXExt glXExt) {
       if(0==hasSwapGroupNV) {
         try {
-            hasSwapGroupNV = glXExt.isExtensionAvailable("GLX_NV_swap_group")?1:-1;
+            hasSwapGroupNV = glXExt.isExtensionAvailable(GLXExtensions.GLX_NV_swap_group)?1:-1;
         } catch (Throwable t) { hasSwapGroupNV=1; }
         if(DEBUG) {
-            System.err.println("initSwapGroupImpl: hasSwapGroupNV: "+hasSwapGroupNV);
+            System.err.println("initSwapGroupImpl: "+GLXExtensions.GLX_NV_swap_group+": "+hasSwapGroupNV);
         }
       }
       return hasSwapGroupNV;
   }
-  
+
   @Override
   protected final boolean queryMaxSwapGroupsImpl(int[] maxGroups, int maxGroups_offset,
                                                  int[] maxBarriers, int maxBarriers_offset) {
@@ -541,16 +574,20 @@ public abstract class X11GLXContext extends GLContextImpl {
       if (initSwapGroupImpl(glXExt)>0) {
         final NativeSurface ns = drawable.getNativeSurface();
         try {
-            if( glXExt.glXQueryMaxSwapGroupsNV(ns.getDisplayHandle(), ns.getScreenIndex(), 
-                                               maxGroups, maxGroups_offset,
-                                               maxBarriers, maxBarriers_offset) ) {
+            final IntBuffer maxGroupsNIO = Buffers.newDirectIntBuffer(maxGroups.length - maxGroups_offset);
+            final IntBuffer maxBarriersNIO = Buffers.newDirectIntBuffer(maxBarriers.length - maxBarriers_offset);
+
+            if( glXExt.glXQueryMaxSwapGroupsNV(ns.getDisplayHandle(), ns.getScreenIndex(),
+                                               maxGroupsNIO, maxBarriersNIO) ) {
+                maxGroupsNIO.get(maxGroups, maxGroups_offset, maxGroupsNIO.remaining());
+                maxBarriersNIO.get(maxGroups, maxGroups_offset, maxBarriersNIO.remaining());
                 res = true;
             }
         } catch (Throwable t) { hasSwapGroupNV=-1; }
       }
       return res;
   }
-  
+
   @Override
   protected final boolean joinSwapGroupImpl(int group) {
       boolean res = false;
@@ -565,7 +602,7 @@ public abstract class X11GLXContext extends GLContextImpl {
       }
       return res;
   }
-  
+
   @Override
   protected final boolean bindSwapBarrierImpl(int group, int barrier) {
       boolean res = false;
@@ -577,34 +614,20 @@ public abstract class X11GLXContext extends GLContextImpl {
             }
         } catch (Throwable t) { hasSwapGroupNV=-1; }
       }
-      return res;  
+      return res;
   }
 
   @Override
-  public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
-    return getGLXExt().glXAllocateMemoryNV(arg0, arg1, arg2, arg3);
+  public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {
+    return getGLXExt().glXAllocateMemoryNV(size, readFrequency, writeFrequency, priority);
   }
 
-  public int getOffscreenContextPixelDataType() {
-    throw new GLException("Should not call this");
-  }
-
-  public int getOffscreenContextReadBuffer() {
-    throw new GLException("Should not call this");
-  }
-
-  public boolean offscreenImageNeedsVerticalFlip() {
-    throw new GLException("Should not call this");
-  }
-
-  public void bindPbufferToTexture() {
-    throw new GLException("Should not call this");
-  }
-
-  public void releasePbufferFromTexture() {
-    throw new GLException("Should not call this");
+  @Override
+  public final void glFreeMemoryNV(ByteBuffer pointer) {
+    getGLXExt().glXFreeMemoryNV(pointer);
   }
 
+  @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append(getClass().getSimpleName());
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawable.java
index 61f2ef9c9..155c00c4c 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,45 +29,50 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.x11.glx;
 
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.opengl.GLDrawableFactory;
 
-import jogamp.opengl.*;
+import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLDynamicLookupHelper;
 
 public abstract class X11GLXDrawable extends GLDrawableImpl {
   protected X11GLXDrawable(GLDrawableFactory factory, NativeSurface comp, boolean realized) {
     super(factory, comp, realized);
   }
 
+  @Override
   public GLDynamicLookupHelper getGLDynamicLookupHelper() {
     return getFactoryImpl().getGLDynamicLookupHelper(0);
   }
 
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)getNativeSurface().getGraphicsConfiguration();
         config.updateGraphicsConfiguration();
 
         if (DEBUG) {
-          System.err.println("X11GLXDrawable.setRealized(true): "+config);
+          System.err.println(getThreadName()+": X11GLXDrawable.setRealized(true): "+config);
         }
     }
   }
 
-  protected final void swapBuffersImpl() {
-    // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
-    GLX.glXSwapBuffers(getNativeSurface().getDisplayHandle(), getHandle());
+  @Override
+  protected final void swapBuffersImpl(boolean doubleBuffered) {
+    if(doubleBuffered) {
+        GLX.glXSwapBuffers(getNativeSurface().getDisplayHandle(), getHandle());
+    }
   }
 
   //---------------------------------------------------------------------------
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
index 092d3439e..f7938f463 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,7 +29,7 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
@@ -39,6 +39,8 @@ package jogamp.opengl.x11.glx;
 
 import java.nio.Buffer;
 import java.nio.ShortBuffer;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
@@ -47,16 +49,19 @@ import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
+import javax.media.nativewindow.VisualIDHolder;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
-import javax.media.opengl.GLProfile.ShutdownType;
 
+import jogamp.nativewindow.WrappedSurface;
+import jogamp.nativewindow.x11.X11DummyUpstreamSurfaceHook;
 import jogamp.nativewindow.x11.X11Lib;
 import jogamp.nativewindow.x11.X11Util;
 import jogamp.opengl.DesktopGLDynamicLookupHelper;
@@ -64,60 +69,78 @@ import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.SharedResourceRunner;
 
 import com.jogamp.common.util.VersionNumber;
-import com.jogamp.nativewindow.WrappedSurface;
 import com.jogamp.nativewindow.x11.X11GraphicsDevice;
 import com.jogamp.nativewindow.x11.X11GraphicsScreen;
+import com.jogamp.opengl.GLRendererQuirks;
 
 public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
-  
+
   public static final VersionNumber versionOneZero = new VersionNumber(1, 0, 0);
   public static final VersionNumber versionOneOne = new VersionNumber(1, 1, 0);
   public static final VersionNumber versionOneTwo = new VersionNumber(1, 2, 0);
   public static final VersionNumber versionOneThree = new VersionNumber(1, 3, 0);
   public static final VersionNumber versionOneFour = new VersionNumber(1, 4, 0);
 
+  static final String GLX_SGIX_pbuffer = "GLX_SGIX_pbuffer";
+
   private static DesktopGLDynamicLookupHelper x11GLXDynamicLookupHelper = null;
-  
+
   public X11GLXDrawableFactory() {
     super();
 
     synchronized(X11GLXDrawableFactory.class) {
-        if(null==x11GLXDynamicLookupHelper) {
-            DesktopGLDynamicLookupHelper tmp = null;
-            try {
-                tmp = new DesktopGLDynamicLookupHelper(new X11GLXDynamicLibraryBundleInfo());
-            } catch (GLException gle) {
-                if(DEBUG) {
-                    gle.printStackTrace();
+        if( null == x11GLXDynamicLookupHelper ) {
+            x11GLXDynamicLookupHelper = AccessController.doPrivileged(new PrivilegedAction<DesktopGLDynamicLookupHelper>() {
+                @Override
+                public DesktopGLDynamicLookupHelper run() {
+                    DesktopGLDynamicLookupHelper tmp;
+                    try {
+                        tmp = new DesktopGLDynamicLookupHelper(new X11GLXDynamicLibraryBundleInfo());
+                        if(null!=tmp && tmp.isLibComplete()) {
+                            GLX.getGLXProcAddressTable().reset(tmp);
+                        }
+                    } catch (Exception ex) {
+                        tmp = null;
+                        if(DEBUG) {
+                            ex.printStackTrace();
+                        }
+                    }
+                    return tmp;
                 }
-            }            
-            if(null!=tmp && tmp.isLibComplete()) {
-                x11GLXDynamicLookupHelper = tmp;
-                GLX.getGLXProcAddressTable().reset(x11GLXDynamicLookupHelper);
-            }
+            } );
         }
     }
-    
+
     defaultDevice = new X11GraphicsDevice(X11Util.getNullDisplayName(), AbstractGraphicsDevice.DEFAULT_UNIT);
-    
+
     if(null!=x11GLXDynamicLookupHelper) {
         // Register our GraphicsConfigurationFactory implementations
         // The act of constructing them causes them to be registered
         X11GLXGraphicsConfigurationFactory.registerFactory();
-        
+
         sharedMap = new HashMap<String, SharedResourceRunner.Resource>();
-        
+
         // Init shared resources off thread
         // Will be released via ShutdownHook
         sharedResourceRunner = new SharedResourceRunner(new SharedResourceImplementation());
         sharedResourceRunner.start();
-    }    
+    }
+  }
+
+  @Override
+  protected final boolean isComplete() {
+      return null != x11GLXDynamicLookupHelper;
   }
 
-  protected final void destroy(ShutdownType shutdownType) {
+  @Override
+  protected final void shutdownImpl() {
+    if( DEBUG ) {
+        System.err.println("X11GLXDrawableFactory.shutdown");
+    }
     if(null != sharedResourceRunner) {
         sharedResourceRunner.stop();
         sharedResourceRunner = null;
@@ -129,57 +152,65 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
     defaultDevice = null;
     /**
      * Pulling away the native library may cause havoc ..
-     * 
-    if(ShutdownType.COMPLETE == shutdownType && null != x11GLXDynamicLookupHelper) {
-        x11GLXDynamicLookupHelper.destroy();
-        x11GLXDynamicLookupHelper = null;
-    } */
-
-    // Don't really close pending Display connections,
-    // since this may trigger a JVM exception
-    X11Util.shutdown( false, DEBUG );
+     *
+       x11GLXDynamicLookupHelper.destroy();
+     */
+    x11GLXDynamicLookupHelper = null;
   }
 
+  @Override
   public final GLDynamicLookupHelper getGLDynamicLookupHelper(int profile) {
       return x11GLXDynamicLookupHelper;
   }
 
   private X11GraphicsDevice defaultDevice;
   private SharedResourceRunner sharedResourceRunner;
-  private HashMap<String /* connection */, SharedResourceRunner.Resource> sharedMap;  
+  private HashMap<String /* connection */, SharedResourceRunner.Resource> sharedMap;
 
   static class SharedResource implements SharedResourceRunner.Resource {
+      private final String glXServerVendorName;
+      private final boolean isGLXServerVendorATI;
+      private final boolean isGLXServerVendorNVIDIA;
+      private final VersionNumber glXServerVersion;
+      private final boolean glXServerVersionOneOneCapable;
+      private final boolean glXServerVersionOneThreeCapable;
+      private final boolean glXMultisampleAvailable;
       X11GraphicsDevice device;
       X11GraphicsScreen screen;
-      X11DummyGLXDrawable drawable;
-      X11GLXContext context;
-      String glXServerVendorName;
-      boolean isGLXServerVendorATI;
-      boolean isGLXServerVendorNVIDIA;
-      VersionNumber glXServerVersion;
-      boolean glXServerVersionOneOneCapable;
-      boolean glXServerVersionOneThreeCapable;
-      boolean glXMultisampleAvailable;
+      GLDrawableImpl drawable;
+      GLContextImpl context;
 
       SharedResource(X11GraphicsDevice dev, X11GraphicsScreen scrn,
-                     X11DummyGLXDrawable draw, X11GLXContext ctx,
+                     GLDrawableImpl draw, GLContextImpl ctx,
                      VersionNumber glXServerVer, String glXServerVendor, boolean glXServerMultisampleAvail) {
           device = dev;
           screen = scrn;
           drawable = draw;
           context = ctx;
           glXServerVersion = glXServerVer;
-          glXServerVersionOneOneCapable = glXServerVersion.compareTo(versionOneOne) >= 0 ;        
-          glXServerVersionOneThreeCapable = glXServerVersion.compareTo(versionOneThree) >= 0 ;        
+          glXServerVersionOneOneCapable = glXServerVersion.compareTo(versionOneOne) >= 0 ;
+          glXServerVersionOneThreeCapable = glXServerVersion.compareTo(versionOneThree) >= 0 ;
           glXServerVendorName = glXServerVendor;
           isGLXServerVendorATI = GLXUtil.isVendorATI(glXServerVendorName);
           isGLXServerVendorNVIDIA = GLXUtil.isVendorNVIDIA(glXServerVendorName);
           glXMultisampleAvailable = glXServerMultisampleAvail;
       }
+      @Override
+      public final boolean isValid() {
+          return null != context;
+      }
+      @Override
       final public AbstractGraphicsDevice getDevice() { return device; }
+      @Override
       final public AbstractGraphicsScreen getScreen() { return screen; }
+      @Override
       final public GLDrawableImpl getDrawable() { return drawable; }
+      @Override
       final public GLContextImpl getContext() { return context; }
+      @Override
+      public GLRendererQuirks getRendererQuirks() {
+          return null != context ? context.getRendererQuirks() : null;
+      }
 
       final String getGLXVendorName() { return glXServerVendorName; }
       final boolean isGLXVendorATI() { return isGLXServerVendorATI; }
@@ -191,60 +222,72 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   class SharedResourceImplementation implements SharedResourceRunner.Implementation {
+        @Override
         public void clear() {
-            synchronized(sharedMap) {
-                sharedMap.clear();
-            }
+            sharedMap.clear();
         }
+        @Override
         public SharedResourceRunner.Resource mapPut(String connection, SharedResourceRunner.Resource resource) {
-            synchronized(sharedMap) {
-                return sharedMap.put(connection, resource);
-            }
+            return sharedMap.put(connection, resource);
         }
+        @Override
         public SharedResourceRunner.Resource mapGet(String connection) {
-            synchronized(sharedMap) {
-                return sharedMap.get(connection);
-            }
+            return sharedMap.get(connection);
         }
+        @Override
         public Collection<SharedResourceRunner.Resource> mapValues() {
-            synchronized(sharedMap) {
-                return sharedMap.values();
+            return sharedMap.values();
+        }
+
+        @Override
+        public boolean isDeviceSupported(String connection) {
+            final boolean res;
+            final X11GraphicsDevice x11Device = new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT, true /* owner */);
+            x11Device.lock();
+            try {
+                res = GLXUtil.isGLXAvailableOnServer(x11Device);
+            } finally {
+                x11Device.unlock();
+                x11Device.close();
+            }
+            if(DEBUG) {
+                System.err.println("GLX "+(res ? "is" : "not")+" available on device/server: "+x11Device);
             }
+            return res;
         }
 
+        @Override
         public SharedResourceRunner.Resource createSharedResource(String connection) {
-            X11GraphicsDevice sharedDevice = 
-                    new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT, 
-                                          true); // own non-shared display connection, no locking
-                    // new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT, 
-                    //                       NativeWindowFactory.getNullToolkitLock(), true); // own non-shared display connection, no locking
+            final X11GraphicsDevice sharedDevice = new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT, true /* owner */);
             sharedDevice.lock();
             try {
-                if(!GLXUtil.isGLXAvailableOnServer(sharedDevice)) {
-                    throw new GLException("GLX not available on device/server: "+sharedDevice);
-                }
-                GLXUtil.initGLXClientDataSingleton(sharedDevice);                
+                final X11GraphicsScreen sharedScreen = new X11GraphicsScreen(sharedDevice, sharedDevice.getDefaultScreen());
+
+                GLXUtil.initGLXClientDataSingleton(sharedDevice);
                 final String glXServerVendorName = GLX.glXQueryServerString(sharedDevice.getHandle(), 0, GLX.GLX_VENDOR);
-                final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber(sharedDevice.getHandle());
-                final boolean glXServerMultisampleAvailable = GLXUtil.isMultisampleAvailable(GLX.glXQueryServerString(sharedDevice.getHandle(), 0, GLX.GLX_EXTENSIONS));                
-                if(X11Util.ATI_HAS_XCLOSEDISPLAY_BUG && GLXUtil.isVendorATI(glXServerVendorName)) {
-                    X11Util.setMarkAllDisplaysUnclosable(true);
-                    X11Util.markDisplayUncloseable(sharedDevice.getHandle());
-                }
-                X11GraphicsScreen sharedScreen = new X11GraphicsScreen(sharedDevice, 0);
+                final boolean glXServerMultisampleAvailable = GLXUtil.isMultisampleAvailable(GLX.glXQueryServerString(sharedDevice.getHandle(), 0, GLX.GLX_EXTENSIONS));
 
-                GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
+                final GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
                 if (null == glp) {
                     throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
                 }
-                X11DummyGLXDrawable sharedDrawable = X11DummyGLXDrawable.create(sharedScreen, X11GLXDrawableFactory.this, glp);
-                if (null == sharedDrawable) {
-                    throw new GLException("Couldn't create shared drawable for screen: "+sharedScreen+", "+glp);
+
+                final GLCapabilitiesImmutable caps = new GLCapabilities(glp);
+                final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, caps, caps, null, 64, 64));
+                sharedDrawable.setRealized(true);
+                final X11GLCapabilities chosenCaps =  (X11GLCapabilities) sharedDrawable.getChosenGLCapabilities();
+                final boolean glxForcedOneOne = !chosenCaps.hasFBConfig();
+                final VersionNumber glXServerVersion;
+                if( glxForcedOneOne ) {
+                    glXServerVersion = versionOneOne;
+                } else {
+                    glXServerVersion = GLXUtil.getGLXServerVersionNumber(sharedDevice);
                 }
-                X11GLXContext sharedContext = (X11GLXContext) sharedDrawable.createContext(null);
+                final GLContextImpl sharedContext = (GLContextImpl) sharedDrawable.createContext(null);
                 if (null == sharedContext) {
                     throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
                 }
+
                 boolean madeCurrent = false;
                 sharedContext.makeCurrent();
                 try {
@@ -252,19 +295,22 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
                 } finally {
                     sharedContext.release();
                 }
+                if( sharedContext.hasRendererQuirk( GLRendererQuirks.DontCloseX11Display ) ) {
+                    X11Util.markAllDisplaysUnclosable();
+                }
                 if (DEBUG) {
                     System.err.println("SharedDevice:  " + sharedDevice);
                     System.err.println("SharedScreen:  " + sharedScreen);
                     System.err.println("SharedContext: " + sharedContext + ", madeCurrent " + madeCurrent);
                     System.err.println("GLX Server Vendor:      " + glXServerVendorName);
-                    System.err.println("GLX Server Version:     " + glXServerVersion);
+                    System.err.println("GLX Server Version:     " + glXServerVersion + ", forced "+glxForcedOneOne);
                     System.err.println("GLX Server Multisample: " + glXServerMultisampleAvailable);
                     System.err.println("GLX Client Vendor:      " + GLXUtil.getClientVendorName());
                     System.err.println("GLX Client Version:     " + GLXUtil.getClientVersionNumber());
                     System.err.println("GLX Client Multisample: " + GLXUtil.isClientMultisampleAvailable());
                 }
-                return new SharedResource(sharedDevice, sharedScreen, sharedDrawable, sharedContext, 
-                                          glXServerVersion, glXServerVendorName, 
+                return new SharedResource(sharedDevice, sharedScreen, sharedDrawable, sharedContext,
+                                          glXServerVersion, glXServerVendorName,
                                           glXServerMultisampleAvailable && GLXUtil.isClientMultisampleAvailable());
             } catch (Throwable t) {
                 throw new GLException("X11GLXDrawableFactory - Could not initialize shared resources for "+connection, t);
@@ -273,6 +319,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
             }
         }
 
+        @Override
         public void releaseSharedResource(SharedResourceRunner.Resource shared) {
             SharedResource sr = (SharedResource) shared;
             if (DEBUG) {
@@ -285,14 +332,14 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
             }
 
             if (null != sr.context) {
-                // may cause JVM SIGSEGV:
-                sr.context.destroy();
+                // may cause JVM SIGSEGV, or freeze (ATI fglrx 3-6-beta2 32on64 shared ctx):
+                sr.context.destroy(); // will also pull the dummy MutableSurface
                 sr.context = null;
             }
 
             if (null != sr.drawable) {
                 // may cause JVM SIGSEGV:
-                sr.drawable.destroy();
+                sr.drawable.setRealized(false);
                 sr.drawable = null;
             }
 
@@ -308,10 +355,12 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
         }
   }
 
+  @Override
   public final AbstractGraphicsDevice getDefaultDevice() {
       return defaultDevice;
   }
 
+  @Override
   public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
       if(null != x11GLXDynamicLookupHelper && device instanceof X11GraphicsDevice) {
           return true;
@@ -319,64 +368,38 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
       return false;
   }
 
+  @Override
   protected final Thread getSharedResourceThread() {
     return sharedResourceRunner.start();
   }
-    
-  protected final boolean createSharedResource(AbstractGraphicsDevice device) {
-    try {
-        SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
-        if(null!=sr) {
-          return null != sr.getContext();
-        }
-    } catch (GLException gle) {
-        if(DEBUG) {
-            System.err.println("Catched Exception while X11GLX Shared Resource initialization");
-            gle.printStackTrace();
-        }
-    }
-    return false;
-  }
-  
-  protected final GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device) {
-    SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
-    if(null!=sr) {
-      return sr.getContext();
-    }
-    return null;
-  }
 
-  protected AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device) {
-    SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
-    if(null!=sr) {
-        return sr.getDevice();
-    }
-    return null;
+  @Override
+  protected final SharedResource getOrCreateSharedResourceImpl(AbstractGraphicsDevice device) {
+    return (SharedResource) sharedResourceRunner.getOrCreateShared(device);
   }
 
   protected final long getOrCreateSharedDpy(AbstractGraphicsDevice device) {
-    SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(device);
+    final SharedResourceRunner.Resource sr = getOrCreateSharedResource( device );
     if(null!=sr) {
         return sr.getDevice().getHandle();
     }
     return 0;
   }
 
-  SharedResource getOrCreateSharedResource(AbstractGraphicsDevice device) {
-    return (SharedResource) sharedResourceRunner.getOrCreateShared(device);
-  }
-
+  @Override
   protected List<GLCapabilitiesImmutable> getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
     return X11GLXGraphicsConfigurationFactory.getAvailableCapabilities(this, device);
   }
 
+  @Override
   protected final GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
     }
-    return new X11OnscreenGLXDrawable(this, target);
+    return new X11OnscreenGLXDrawable(this, target, false);
   }
 
+  @Override
   protected final GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
@@ -412,7 +435,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   public final boolean isGLXMultisampleAvailable(AbstractGraphicsDevice device) {
-    if(null != device) {  
+    if(null != device) {
         SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
         if(null!=sr) {
           return sr.isGLXMultisampleAvailable();
@@ -422,47 +445,48 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   public final VersionNumber getGLXVersionNumber(AbstractGraphicsDevice device) {
-    if(null != device) {  
+    if(null != device) {
         SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
         if(null!=sr) {
           return sr.getGLXVersion();
         }
         if( device instanceof X11GraphicsDevice ) {
-          return GLXUtil.getGLXServerVersionNumber(device.getHandle());
+          return GLXUtil.getGLXServerVersionNumber((X11GraphicsDevice)device);
         }
     }
     return null;
   }
-  
+
   public final boolean isGLXVersionGreaterEqualOneOne(AbstractGraphicsDevice device) {
-    if(null != device) {  
+    if(null != device) {
         SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
         if(null!=sr) {
           return sr.isGLXVersionGreaterEqualOneOne();
         }
         if( device instanceof X11GraphicsDevice ) {
-          final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber(device.getHandle());
+          final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber((X11GraphicsDevice)device);
           return glXServerVersion.compareTo(versionOneOne) >= 0;
         }
     }
     return false;
   }
-  
+
   public final boolean isGLXVersionGreaterEqualOneThree(AbstractGraphicsDevice device) {
-    if(null != device) {  
+    if(null != device) {
         SharedResource sr = (SharedResource) sharedResourceRunner.getOrCreateShared(device);
         if(null!=sr) {
           return sr.isGLXVersionGreaterEqualOneThree();
         }
         if( device instanceof X11GraphicsDevice ) {
-          final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber(device.getHandle());
+          final VersionNumber glXServerVersion = GLXUtil.getGLXServerVersionNumber((X11GraphicsDevice)device);
           return glXServerVersion.compareTo(versionOneThree) >= 0;
         }
     }
     return false;
   }
 
-  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
+  @Override
+  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
       if(null == device) {
         SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(defaultDevice);
         if(null!=sr) {
@@ -472,68 +496,72 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
       return isGLXVersionGreaterEqualOneThree(device);
   }
 
-  protected final NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice deviceReq,
-                                                           GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
-                                                           GLCapabilitiesChooser chooser,
-                                                           int width, int height) {
-    if(null == deviceReq) {
-        throw new InternalError("deviceReq is null");
-    }
-    final SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(deviceReq);
-    if(null==sr) {
-        throw new InternalError("No SharedResource for: "+deviceReq);
+  @Override
+  protected final ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                        GLCapabilitiesImmutable capsChosen,
+                                                        GLCapabilitiesImmutable capsRequested,
+                                                        GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook) {
+    final X11GraphicsDevice device;
+    if( createNewDevice || !(deviceReq instanceof X11GraphicsDevice) ) {
+        device = new X11GraphicsDevice(X11Util.openDisplay(deviceReq.getConnection()), deviceReq.getUnitID(), true /* owner */);
+    } else {
+        device = (X11GraphicsDevice) deviceReq;
     }
-    final X11GraphicsScreen sharedScreen = (X11GraphicsScreen) sr.getScreen();
-    final AbstractGraphicsDevice sharedDevice = sharedScreen.getDevice(); // should be same ..
-
-    // create screen/device pair - Null X11 locking, due to private non-shared Display handle
-    final X11GraphicsDevice device = new X11GraphicsDevice(X11Util.openDisplay(sharedDevice.getConnection()), AbstractGraphicsDevice.DEFAULT_UNIT, NativeWindowFactory.getNullToolkitLock(), true);
-    final X11GraphicsScreen screen = new X11GraphicsScreen(device, sharedScreen.getIndex()); 
-    
-    WrappedSurface ns = new WrappedSurface(
-               X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen) );
-    if(ns != null) {
-        ns.surfaceSizeChanged(width, height);
+    final X11GraphicsScreen screen = new X11GraphicsScreen(device, device.getDefaultScreen());
+    final X11GLXGraphicsConfiguration config = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen);
     }
-    return ns;
+    return new WrappedSurface(config, 0, upstreamHook, createNewDevice);
   }
 
-  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice adevice, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-    // FIXME device/windowHandle -> screen ?!
-    X11GraphicsDevice device = (X11GraphicsDevice) adevice;
-    X11GraphicsScreen screen = new X11GraphicsScreen(device, 0);
-    X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen);
-    WrappedSurface ns = new WrappedSurface(cfg, windowHandle);
-    return ns;
+  @Override
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                   GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(chosenCaps);
+    return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser, new X11DummyUpstreamSurfaceHook(width, height));
   }
- 
+
+  @Override
+  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final X11GraphicsDevice device = new X11GraphicsDevice(X11Util.openDisplay(deviceReq.getConnection()), deviceReq.getUnitID(), true /* owner */);
+    final X11GraphicsScreen screen = new X11GraphicsScreen(device, screenIdx);
+    final int xvisualID = X11Lib.GetVisualIDFromWindow(device.getHandle(), windowHandle);
+    if(VisualIDHolder.VID_UNDEFINED == xvisualID) {
+        throw new GLException("Undefined VisualID of window 0x"+Long.toHexString(windowHandle)+", window probably invalid");
+    }
+    if(DEBUG) {
+        System.err.println("X11GLXDrawableFactory.createProxySurfaceImpl 0x"+Long.toHexString(windowHandle)+": visualID 0x"+Integer.toHexString(xvisualID));
+    }
+    final X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, xvisualID);
+    if(DEBUG) {
+        System.err.println("X11GLXDrawableFactory.createProxySurfaceImpl 0x"+Long.toHexString(windowHandle)+": "+cfg);
+    }
+    return new WrappedSurface(cfg, windowHandle, upstream, true);
+  }
+
+  @Override
   protected final GLContext createExternalGLContextImpl() {
     return X11ExternalGLXContext.create(this, null);
   }
 
+  @Override
   public final boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
-    return canCreateGLPbuffer(device);
+    return canCreateGLPbuffer(device, null /* GLProfile not used for query on X11 */);
   }
 
+  @Override
   protected final GLDrawable createExternalGLDrawableImpl() {
     return X11ExternalGLXDrawable.create(this, null);
   }
 
-  public final boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-    return false;
-  }
-
-  public final GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException {
-    throw new GLException("Unimplemented on this platform");
-  }
-
   //----------------------------------------------------------------------
   // Gamma-related functionality
   //
 
   private boolean gotGammaRampLength;
   private int gammaRampLength;
+  @Override
   protected final synchronized int getGammaRampLength() {
     if (gotGammaRampLength) {
       return gammaRampLength;
@@ -556,6 +584,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
     return gammaRampLength;
   }
 
+  @Override
   protected final boolean setGammaRamp(float[] ramp) {
     long display = getOrCreateSharedDpy(defaultDevice);
     if(0 == display) {
@@ -577,6 +606,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
     return res;
   }
 
+  @Override
   protected final Buffer getGammaRamp() {
     long display = getOrCreateSharedDpy(defaultDevice);
     if(0 == display) {
@@ -607,6 +637,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
     return rampData;
   }
 
+  @Override
   protected final void resetGammaRamp(Buffer originalGammaRamp) {
     if (originalGammaRamp == null) {
         return; // getGammaRamp failed originally
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java
index 108c157a8..951174f71 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,28 +20,28 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.x11.glx;
 
 import jogamp.opengl.*;
 import java.util.*;
 
-public class X11GLXDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
+public final class X11GLXDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
     protected X11GLXDynamicLibraryBundleInfo() {
         super();
     }
 
     @Override
-    public List<List<String>> getToolLibNames() {
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         final List<String> libsGL = new ArrayList<String>();
-        
-        // Be aware that on DRI systems, eg ATI fglrx, etc, 
+
+        // Be aware that on DRI systems, eg ATI fglrx, etc,
         // you have to set LIBGL_DRIVERS_PATH env variable.
         // Eg on Ubuntu 64bit systems this is:
         //    export LIBGL_DRIVERS_PATH=/usr/lib/fglrx/dri:/usr/lib32/fglrx/dri
@@ -55,19 +55,10 @@ public class X11GLXDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundl
 
         // last but not least .. the generic one
         libsGL.add("GL");
-        
-        libsList.add(libsGL);        
+
+        libsList.add(libsGL);
         return libsList;
-    }    
-    
-    /** 
-     * This respects old DRI requirements:<br>
-     * <pre>
-     * http://dri.sourceforge.net/doc/DRIuserguide.html
-     * </pre>
-     */
-    @Override
-    public boolean shallLinkGlobal() { return true; }
+    }
 
     @Override
     public final List<String> getToolGetProcAddressFuncNameList() {
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java
index 0af62394c..ee3e1a3d7 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -33,9 +33,13 @@
 
 package jogamp.opengl.x11.glx;
 
+import java.nio.IntBuffer;
 import java.util.ArrayList;
+import java.util.List;
 
+import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
+import javax.media.nativewindow.VisualIDHolder;
 import javax.media.opengl.DefaultGLCapabilitiesChooser;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilities;
@@ -51,22 +55,63 @@ import jogamp.nativewindow.x11.XRenderPictFormat;
 import jogamp.nativewindow.x11.XVisualInfo;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.nativewindow.x11.X11GraphicsConfiguration;
+import com.jogamp.nativewindow.x11.X11GraphicsDevice;
 import com.jogamp.nativewindow.x11.X11GraphicsScreen;
 
 public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implements Cloneable {
     public static final int MAX_ATTRIBS = 128;
-    private GLCapabilitiesChooser chooser; 
+    private final GLCapabilitiesChooser chooser;
 
-    X11GLXGraphicsConfiguration(X11GraphicsScreen screen, 
+    X11GLXGraphicsConfiguration(X11GraphicsScreen screen,
                                 X11GLCapabilities capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
         super(screen, capsChosen, capsRequested, capsChosen.getXVisualInfo());
         this.chooser=chooser;
     }
 
+    @Override
+    public Object clone() {
+        return super.clone();
+    }
+
+    public final long getFBConfig()   {
+        return ((X11GLCapabilities)capabilitiesChosen).getFBConfig();
+    }
+    public final int  getFBConfigID() {
+        return ((X11GLCapabilities)capabilitiesChosen).getFBConfigID();
+    }
+    public final boolean hasFBConfig() {
+        return ((X11GLCapabilities)capabilitiesChosen).hasFBConfig();
+    }
+
+    void updateGraphicsConfiguration() {
+        final CapabilitiesImmutable aChosenCaps = getChosenCapabilities();
+        if( !(aChosenCaps instanceof X11GLCapabilities) || VisualIDHolder.VID_UNDEFINED == aChosenCaps.getVisualID(VIDType.X11_XVISUAL) ) {
+            // This case is actually quite impossible, since on X11 the visualID and hence GraphicsConfiguration
+            // must be determined _before_ window creation!
+            final X11GLXGraphicsConfiguration newConfig = (X11GLXGraphicsConfiguration)
+                GraphicsConfigurationFactory.getFactory(getScreen().getDevice(), aChosenCaps).chooseGraphicsConfiguration(
+                    aChosenCaps, getRequestedCapabilities(), chooser, getScreen(), VisualIDHolder.VID_UNDEFINED);
+            if(null!=newConfig) {
+                // FIXME: setScreen( ... );
+                setXVisualInfo(newConfig.getXVisualInfo());
+                setChosenCapabilities(newConfig.getChosenCapabilities());
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.updateGraphicsConfiguration updated:"+this);
+                }
+            } else {
+                throw new GLException("No native VisualID pre-chosen and update failed: "+this);
+            }
+        } else if (DEBUG) {
+            System.err.println("X11GLXGraphicsConfiguration.updateGraphicsConfiguration kept:"+this);
+        }
+    }
+
     static X11GLXGraphicsConfiguration create(GLProfile glp, X11GraphicsScreen x11Screen, int fbcfgID) {
-      final long display = x11Screen.getDevice().getHandle();
+      final X11GraphicsDevice device = (X11GraphicsDevice) x11Screen.getDevice();
+      final long display = device.getHandle();
       if(0==display) {
           throw new GLException("Display null of "+x11Screen);
       }
@@ -79,43 +124,16 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         glp = GLProfile.getDefault(x11Screen.getDevice());
       }
       final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
-      final X11GLCapabilities caps = GLXFBConfig2GLCapabilities(glp, display, fbcfg, true, true, true, factory.isGLXMultisampleAvailable(x11Screen.getDevice()));
+      final X11GLCapabilities caps = GLXFBConfig2GLCapabilities(device, glp, fbcfg, GLGraphicsConfigurationUtil.ALL_BITS, factory.isGLXMultisampleAvailable(device));
       if(null==caps) {
           throw new GLException("GLCapabilities null of "+toHexString(fbcfg));
       }
       return new X11GLXGraphicsConfiguration(x11Screen, caps, caps, new DefaultGLCapabilitiesChooser());
     }
 
-    public Object clone() {
-        return super.clone();
-    }
-
-    public final long getFBConfig()   {
-        return ((X11GLCapabilities)capabilitiesChosen).getFBConfig();
-    }
-    public final int  getFBConfigID() {
-        return ((X11GLCapabilities)capabilitiesChosen).getFBConfigID();
-    }
-
-    void updateGraphicsConfiguration() {
-        X11GLXGraphicsConfiguration newConfig = (X11GLXGraphicsConfiguration)
-            GraphicsConfigurationFactory.getFactory(getScreen().getDevice()).chooseGraphicsConfiguration(
-                getChosenCapabilities(), getRequestedCapabilities(), chooser, getScreen());
-        if(null!=newConfig) {
-            // FIXME: setScreen( ... );
-            setXVisualInfo(newConfig.getXVisualInfo());
-            setChosenCapabilities(newConfig.getChosenCapabilities());
-            if(DEBUG) {
-                System.err.println("updateGraphicsConfiguration: "+this);
-            }
-        }
-    }
-
-    static int[] GLCapabilities2AttribList(GLCapabilitiesImmutable caps,
-                                           boolean forFBAttr,
-                                           boolean isMultisampleAvailable,
-                                           long display,
-                                           int screen) 
+    static IntBuffer GLCapabilities2AttribList(GLCapabilitiesImmutable caps,
+                                               boolean forFBAttr, boolean isMultisampleAvailable,
+                                               long display, int screen)
     {
         int colorDepth = (caps.getRedBits() +
                           caps.getGreenBits() +
@@ -123,123 +141,124 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         if (colorDepth < 15) {
           throw new GLException("Bit depths < 15 (i.e., non-true-color) not supported");
         }
-        int[] res = new int[MAX_ATTRIBS];
+        final IntBuffer res = Buffers.newDirectIntBuffer(MAX_ATTRIBS);
         int idx = 0;
 
         if (forFBAttr) {
-          res[idx++] = GLX.GLX_DRAWABLE_TYPE;
-          res[idx++] = caps.isOnscreen() ? ( GLX.GLX_WINDOW_BIT ) : ( caps.isPBuffer() ? GLX.GLX_PBUFFER_BIT : GLX.GLX_PIXMAP_BIT ) ;
-        }
+          res.put(idx++, GLX.GLX_DRAWABLE_TYPE);
+
+          final int surfaceType;
+          if( caps.isOnscreen() ) {
+              surfaceType = GLX.GLX_WINDOW_BIT;
+          } else if( caps.isFBO() ) {
+              surfaceType = GLX.GLX_WINDOW_BIT;  // native replacement!
+          } else if( caps.isPBuffer() ) {
+              surfaceType = GLX.GLX_PBUFFER_BIT;
+          } else if( caps.isBitmap() ) {
+              surfaceType = GLX.GLX_PIXMAP_BIT;
+          } else {
+              throw new GLException("no surface type set in caps: "+caps);
+          }
+          res.put(idx++, surfaceType);
 
-        if (forFBAttr) {
-          res[idx++] = GLX.GLX_RENDER_TYPE;
-          res[idx++] = GLX.GLX_RGBA_BIT;
+          res.put(idx++, GLX.GLX_RENDER_TYPE);
+          res.put(idx++, GLX.GLX_RGBA_BIT);
         } else {
-          res[idx++] = GLX.GLX_RGBA;
+          res.put(idx++, GLX.GLX_RGBA);
         }
 
         // FIXME: Still a bug is Mesa: PBUFFER && GLX_STEREO==GL_FALSE ?
         if (forFBAttr) {
-            res[idx++] = GLX.GLX_DOUBLEBUFFER;
-            res[idx++] = caps.getDoubleBuffered()?GL.GL_TRUE:GL.GL_FALSE;
-            res[idx++] = GLX.GLX_STEREO;
-            res[idx++] = caps.getStereo()?GL.GL_TRUE:GL.GL_FALSE;
-            res[idx++] = GLX.GLX_TRANSPARENT_TYPE;
-            res[idx++] = GLX.GLX_NONE;
+            res.put(idx++, GLX.GLX_DOUBLEBUFFER);
+            res.put(idx++, caps.getDoubleBuffered()?GL.GL_TRUE:GL.GL_FALSE);
+            res.put(idx++, GLX.GLX_STEREO);
+            res.put(idx++, caps.getStereo()?GL.GL_TRUE:GL.GL_FALSE);
+            res.put(idx++, GLX.GLX_TRANSPARENT_TYPE);
+            res.put(idx++, GLX.GLX_NONE);
             /**
-            res[idx++] = caps.isBackgroundOpaque()?GLX.GLX_NONE:GLX.GLX_TRANSPARENT_RGB;
+            res.put(idx++, caps.isBackgroundOpaque()?GLX.GLX_NONE:GLX.GLX_TRANSPARENT_RGB;
             if(!caps.isBackgroundOpaque()) {
-                res[idx++] = GLX.GLX_TRANSPARENT_RED_VALUE;
-                res[idx++] = caps.getTransparentRedValue()>=0?caps.getTransparentRedValue():(int)GLX.GLX_DONT_CARE;
-                res[idx++] = GLX.GLX_TRANSPARENT_GREEN_VALUE;
-                res[idx++] = caps.getTransparentGreenValue()>=0?caps.getTransparentGreenValue():(int)GLX.GLX_DONT_CARE;
-                res[idx++] = GLX.GLX_TRANSPARENT_BLUE_VALUE;
-                res[idx++] = caps.getTransparentBlueValue()>=0?caps.getTransparentBlueValue():(int)GLX.GLX_DONT_CARE;
-                res[idx++] = GLX.GLX_TRANSPARENT_ALPHA_VALUE;
-                res[idx++] = caps.getTransparentAlphaValue()>=0?caps.getTransparentAlphaValue():(int)GLX.GLX_DONT_CARE;
+                res.put(idx++, GLX.GLX_TRANSPARENT_RED_VALUE);
+                res.put(idx++, caps.getTransparentRedValue()>=0?caps.getTransparentRedValue():(int)GLX.GLX_DONT_CARE);
+                res.put(idx++, GLX.GLX_TRANSPARENT_GREEN_VALUE);
+                res.put(idx++, caps.getTransparentGreenValue()>=0?caps.getTransparentGreenValue():(int)GLX.GLX_DONT_CARE);
+                res.put(idx++, GLX.GLX_TRANSPARENT_BLUE_VALUE);
+                res.put(idx++, caps.getTransparentBlueValue()>=0?caps.getTransparentBlueValue():(int)GLX.GLX_DONT_CARE);
+                res.put(idx++, GLX.GLX_TRANSPARENT_ALPHA_VALUE);
+                res.put(idx++, caps.getTransparentAlphaValue()>=0?caps.getTransparentAlphaValue():(int)GLX.GLX_DONT_CARE);
             } */
         } else {
             if (caps.getDoubleBuffered()) {
-              res[idx++] = GLX.GLX_DOUBLEBUFFER;
+              res.put(idx++, GLX.GLX_DOUBLEBUFFER);
             }
             if (caps.getStereo()) {
-              res[idx++] = GLX.GLX_STEREO;
+              res.put(idx++, GLX.GLX_STEREO);
             }
         }
 
-        res[idx++] = GLX.GLX_RED_SIZE;
-        res[idx++] = caps.getRedBits();
-        res[idx++] = GLX.GLX_GREEN_SIZE;
-        res[idx++] = caps.getGreenBits();
-        res[idx++] = GLX.GLX_BLUE_SIZE;
-        res[idx++] = caps.getBlueBits();
+        res.put(idx++, GLX.GLX_RED_SIZE);
+        res.put(idx++, caps.getRedBits());
+        res.put(idx++, GLX.GLX_GREEN_SIZE);
+        res.put(idx++, caps.getGreenBits());
+        res.put(idx++, GLX.GLX_BLUE_SIZE);
+        res.put(idx++, caps.getBlueBits());
         if(caps.getAlphaBits()>0) {
-            res[idx++] = GLX.GLX_ALPHA_SIZE;
-            res[idx++] = caps.getAlphaBits();
+            res.put(idx++, GLX.GLX_ALPHA_SIZE);
+            res.put(idx++, caps.getAlphaBits());
         }
         if (caps.getStencilBits() > 0) {
-          res[idx++] = GLX.GLX_STENCIL_SIZE;
-          res[idx++] = caps.getStencilBits();
+          res.put(idx++, GLX.GLX_STENCIL_SIZE);
+          res.put(idx++, caps.getStencilBits());
         }
-        res[idx++] = GLX.GLX_DEPTH_SIZE;
-        res[idx++] = caps.getDepthBits();
+        res.put(idx++, GLX.GLX_DEPTH_SIZE);
+        res.put(idx++, caps.getDepthBits());
         if (caps.getAccumRedBits()   > 0 ||
             caps.getAccumGreenBits() > 0 ||
             caps.getAccumBlueBits()  > 0 ||
             caps.getAccumAlphaBits() > 0) {
-          res[idx++] = GLX.GLX_ACCUM_RED_SIZE;
-          res[idx++] = caps.getAccumRedBits();
-          res[idx++] = GLX.GLX_ACCUM_GREEN_SIZE;
-          res[idx++] = caps.getAccumGreenBits();
-          res[idx++] = GLX.GLX_ACCUM_BLUE_SIZE;
-          res[idx++] = caps.getAccumBlueBits();
-          res[idx++] = GLX.GLX_ACCUM_ALPHA_SIZE;
-          res[idx++] = caps.getAccumAlphaBits();
+          res.put(idx++, GLX.GLX_ACCUM_RED_SIZE);
+          res.put(idx++, caps.getAccumRedBits());
+          res.put(idx++, GLX.GLX_ACCUM_GREEN_SIZE);
+          res.put(idx++, caps.getAccumGreenBits());
+          res.put(idx++, GLX.GLX_ACCUM_BLUE_SIZE);
+          res.put(idx++, caps.getAccumBlueBits());
+          res.put(idx++, GLX.GLX_ACCUM_ALPHA_SIZE);
+          res.put(idx++, caps.getAccumAlphaBits());
         }
         if (isMultisampleAvailable && caps.getSampleBuffers()) {
-          res[idx++] = GLX.GLX_SAMPLE_BUFFERS;
-          res[idx++] = GL.GL_TRUE;
-          res[idx++] = GLX.GLX_SAMPLES;
-          res[idx++] = caps.getNumSamples();
+          res.put(idx++, GLX.GLX_SAMPLE_BUFFERS);
+          res.put(idx++, GL.GL_TRUE);
+          res.put(idx++, GLX.GLX_SAMPLES);
+          res.put(idx++, caps.getNumSamples());
         }
-        if (caps.isPBuffer()) {
-          if (caps.getPbufferFloatingPointBuffers()) {
-            String glXExtensions = GLX.glXQueryExtensionsString(display, screen);
-            if (glXExtensions == null ||
-                glXExtensions.indexOf("GLX_NV_float_buffer") < 0) {
-              throw new GLException("Floating-point pbuffers on X11 currently require NVidia hardware: "+glXExtensions);
-            }
-            res[idx++] = GLXExt.GLX_FLOAT_COMPONENTS_NV;
-            res[idx++] = GL.GL_TRUE;
-          }
-        }
-        res[idx++] = 0;
+        res.put(idx++, 0);
         return res;
   }
 
   // FBConfig
-    
-  static boolean GLXFBConfigIDValid(long display, int screen, int fbcfgid) {      
+
+  static boolean GLXFBConfigIDValid(long display, int screen, int fbcfgid) {
     long fbcfg = X11GLXGraphicsConfiguration.glXFBConfigID2FBConfig(display, screen, fbcfgid);
     return (0 != fbcfg) ? X11GLXGraphicsConfiguration.GLXFBConfigValid( display, fbcfg ) : false ;
   }
 
   static boolean GLXFBConfigValid(long display, long fbcfg) {
-    int[] tmp = new int[1];
-    if(GLX.GLX_BAD_ATTRIBUTE == GLX.glXGetFBConfigAttrib(display, fbcfg, GLX.GLX_RENDER_TYPE, tmp, 0)) {
+    final IntBuffer tmp = Buffers.newDirectIntBuffer(1);
+    if(GLX.GLX_BAD_ATTRIBUTE == GLX.glXGetFBConfigAttrib(display, fbcfg, GLX.GLX_RENDER_TYPE, tmp)) {
       return false;
     }
     return true;
   }
 
-  static int FBCfgDrawableTypeBits(final long display, final long fbcfg) {
+  static int FBCfgDrawableTypeBits(final X11GraphicsDevice device, final long fbcfg) {
     int val = 0;
 
-    int[] tmp = new int[1];
-    int fbtype = glXGetFBConfig(display, fbcfg, GLX.GLX_DRAWABLE_TYPE, tmp, 0);
+    final IntBuffer tmp = Buffers.newDirectIntBuffer(1);
+    int fbtype = glXGetFBConfig(device.getHandle(), fbcfg, GLX.GLX_DRAWABLE_TYPE, tmp);
 
     if ( 0 != ( fbtype & GLX.GLX_WINDOW_BIT ) ) {
-        val |= GLGraphicsConfigurationUtil.WINDOW_BIT;
+        val |= GLGraphicsConfigurationUtil.WINDOW_BIT |
+               GLGraphicsConfigurationUtil.FBO_BIT;
     }
     if ( 0 != ( fbtype & GLX.GLX_PIXMAP_BIT ) ) {
         val |= GLGraphicsConfigurationUtil.BITMAP_BIT;
@@ -250,19 +269,6 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     return val;
   }
 
-  static X11GLCapabilities GLXFBConfig2GLCapabilities(GLProfile glp, long display, long fbcfg,
-                                                            boolean relaxed, boolean onscreen, boolean usePBuffer,
-                                                            boolean isMultisampleAvailable) {
-    ArrayList bucket = new ArrayList();
-    final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-    if( GLXFBConfig2GLCapabilities(bucket, glp, display, fbcfg, winattrmask, isMultisampleAvailable) ) {
-        return (X11GLCapabilities) bucket.get(0);
-    } else if ( relaxed && GLXFBConfig2GLCapabilities(bucket, glp, display, fbcfg, GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
-        return (X11GLCapabilities) bucket.get(0);
-    }
-    return null;
-  }
-
   static XRenderDirectFormat XVisual2XRenderMask(long dpy, long visual) {
     XRenderPictFormat renderPictFmt = X11Lib.XRenderFindVisualFormat(dpy, visual);
     if(null == renderPictFmt) {
@@ -270,70 +276,135 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     }
     return renderPictFmt.getDirect();
   }
+  static XRenderDirectFormat XVisual2XRenderMask(long dpy, long visual, XRenderPictFormat dest) {
+    if( !X11Lib.XRenderFindVisualFormat(dpy, visual, dest) ) {
+        return null;
+    } else {
+        return dest.getDirect();
+    }
+  }
+
+  static X11GLCapabilities GLXFBConfig2GLCapabilities(final X11GraphicsDevice device, final GLProfile glp, final long fbcfg,
+                                                      final int winattrmask, final boolean isMultisampleAvailable) {
+    final IntBuffer tmp = Buffers.newDirectIntBuffer(1);
+    final XRenderPictFormat xRenderPictFormat= XRenderPictFormat.create();
+    return GLXFBConfig2GLCapabilities(device, glp, fbcfg, winattrmask, isMultisampleAvailable, tmp, xRenderPictFormat);
+  }
 
-  static boolean GLXFBConfig2GLCapabilities(ArrayList capsBucket,
-                                            GLProfile glp, long display, long fbcfg,
-                                            int winattrmask, boolean isMultisampleAvailable) {
-    final int allDrawableTypeBits = FBCfgDrawableTypeBits(display, fbcfg);
+  static List<GLCapabilitiesImmutable> GLXFBConfig2GLCapabilities(final X11GraphicsDevice device, final GLProfile glp, final PointerBuffer fbcfgsL,
+                                                                  final int winattrmask, final boolean isMultisampleAvailable, boolean onlyFirstValid) {
+    final IntBuffer tmp = Buffers.newDirectIntBuffer(1);
+    final XRenderPictFormat xRenderPictFormat= XRenderPictFormat.create();
+    final List<GLCapabilitiesImmutable> result = new ArrayList<GLCapabilitiesImmutable>();
+    for (int i = 0; i < fbcfgsL.limit(); i++) {
+        final long fbcfg = fbcfgsL.get(i);
+        final GLCapabilitiesImmutable c = GLXFBConfig2GLCapabilities(device, glp, fbcfg, winattrmask, isMultisampleAvailable, tmp, xRenderPictFormat);
+        if( null != c ) {
+            result.add(c);
+            if( onlyFirstValid ) {
+                break;
+            }
+        }
+    }
+    return result;
+  }
+  static X11GLCapabilities GLXFBConfig2GLCapabilities(final X11GraphicsDevice device, final GLProfile glp, final long fbcfg,
+                                                      final int winattrmask, final boolean isMultisampleAvailable,
+                                                      final IntBuffer tmp, final XRenderPictFormat xRenderPictFormat) {
+    final long display = device.getHandle();
+    final int allDrawableTypeBits = FBCfgDrawableTypeBits(device, fbcfg);
     int drawableTypeBits = winattrmask & allDrawableTypeBits;
 
-    int fbcfgid = X11GLXGraphicsConfiguration.glXFBConfig2FBConfigID(display, fbcfg);
-    XVisualInfo visualInfo = GLX.glXGetVisualFromFBConfig(display, fbcfg);
+    final int fbcfgid = X11GLXGraphicsConfiguration.glXFBConfig2FBConfigID(display, fbcfg);
+    final XVisualInfo visualInfo = GLX.glXGetVisualFromFBConfig(display, fbcfg);
     if(null == visualInfo) {
         if(DEBUG) {
             System.err.println("X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities: Null XVisualInfo for FBConfigID 0x" + Integer.toHexString(fbcfgid));
         }
         // onscreen must have an XVisualInfo
-        drawableTypeBits = drawableTypeBits & ~GLGraphicsConfigurationUtil.WINDOW_BIT;
+        drawableTypeBits &= ~(GLGraphicsConfigurationUtil.WINDOW_BIT | GLGraphicsConfigurationUtil.FBO_BIT);
     }
-
     if( 0 == drawableTypeBits ) {
-        return false;
+      if(DEBUG) {
+          System.err.println("X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities: zero drawablebits: winattrmask: "+toHexString(winattrmask)+", offscreen "+(null == visualInfo));
+      }
+      return null;
     }
 
-    int[] tmp = new int[1];
-    if(GLX.GLX_BAD_ATTRIBUTE == GLX.glXGetFBConfigAttrib(display, fbcfg, GLX.GLX_RENDER_TYPE, tmp, 0)) {
-      return false;
+    if(GLX.GLX_BAD_ATTRIBUTE == GLX.glXGetFBConfigAttrib(display, fbcfg, GLX.GLX_RENDER_TYPE, tmp)) {
+      if(DEBUG) {
+          System.err.println("X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities: FBConfig invalid (1): fbcfg: "+toHexString(fbcfg));
+      }
+      return null;
     }
-    if( 0 == ( GLX.GLX_RGBA_BIT & tmp[0] ) ) {
-      return false; // no RGBA -> color index not supported
-    }
-
-    GLCapabilities res = new X11GLCapabilities(visualInfo, fbcfg, fbcfgid, glp);
-    res.setDoubleBuffered(glXGetFBConfig(display, fbcfg, GLX.GLX_DOUBLEBUFFER,     tmp, 0) != 0);
-    res.setStereo        (glXGetFBConfig(display, fbcfg, GLX.GLX_STEREO,           tmp, 0) != 0);
-    res.setHardwareAccelerated(glXGetFBConfig(display, fbcfg, GLX.GLX_CONFIG_CAVEAT, tmp, 0) != GLX.GLX_SLOW_CONFIG);
-    res.setDepthBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_DEPTH_SIZE,       tmp, 0));
-    res.setStencilBits   (glXGetFBConfig(display, fbcfg, GLX.GLX_STENCIL_SIZE,     tmp, 0));
-    res.setRedBits       (glXGetFBConfig(display, fbcfg, GLX.GLX_RED_SIZE,         tmp, 0));
-    res.setGreenBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_GREEN_SIZE,       tmp, 0));
-    res.setBlueBits      (glXGetFBConfig(display, fbcfg, GLX.GLX_BLUE_SIZE,        tmp, 0));
-    res.setAlphaBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_ALPHA_SIZE,       tmp, 0));
-    res.setAccumRedBits  (glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_RED_SIZE,   tmp, 0));
-    res.setAccumGreenBits(glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_GREEN_SIZE, tmp, 0));
-    res.setAccumBlueBits (glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_BLUE_SIZE,  tmp, 0));
-    res.setAccumAlphaBits(glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_ALPHA_SIZE, tmp, 0));
-    if (isMultisampleAvailable) {
-      res.setSampleBuffers(glXGetFBConfig(display, fbcfg, GLX.GLX_SAMPLE_BUFFERS, tmp, 0) != 0);
-      res.setNumSamples   (glXGetFBConfig(display, fbcfg, GLX.GLX_SAMPLES,        tmp, 0));
+    if( 0 == ( GLX.GLX_RGBA_BIT & tmp.get(0) ) ) {
+      // no RGBA -> color index not supported
+      if(DEBUG) {
+          System.err.println("X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities: FBConfig not RGBA (2): fbcfg: "+toHexString(fbcfg));
+      }
+      return null;
     }
-    final XRenderDirectFormat xrmask = ( null != visualInfo ) ? 
-                                         XVisual2XRenderMask( display, visualInfo.getVisual() ) : 
+
+    final X11GLCapabilities caps = new X11GLCapabilities(visualInfo, fbcfg, fbcfgid, glp);
+
+    final XRenderDirectFormat xrmask = ( null != visualInfo ) ?
+                                         XVisual2XRenderMask( display, visualInfo.getVisual(), xRenderPictFormat) :
                                          null ;
+
+    final int _attributes[] = {
+            GLX.GLX_SAMPLE_BUFFERS,
+            GLX.GLX_SAMPLES,
+            GLX.GLX_DOUBLEBUFFER,
+            GLX.GLX_STEREO,
+            GLX.GLX_CONFIG_CAVEAT,
+            GLX.GLX_RED_SIZE,
+            GLX.GLX_GREEN_SIZE,
+            GLX.GLX_BLUE_SIZE,
+            GLX.GLX_ALPHA_SIZE,
+            GLX.GLX_ACCUM_RED_SIZE,
+            GLX.GLX_ACCUM_GREEN_SIZE,
+            GLX.GLX_ACCUM_BLUE_SIZE,
+            GLX.GLX_ACCUM_ALPHA_SIZE,
+            GLX.GLX_DEPTH_SIZE,
+            GLX.GLX_STENCIL_SIZE
+    };
+    final int offset = isMultisampleAvailable ? 0 : 2;
+    final IntBuffer attributes = Buffers.newDirectIntBuffer(_attributes);
+    attributes.position(offset);
+    final IntBuffer values = Buffers.newDirectIntBuffer(attributes.remaining());
+    final int err = GLX.glXGetFBConfigAttributes(display, fbcfg, attributes, values);
+    if (0 != err) {
+      throw new GLException("glXGetFBConfig("+toHexString(attributes.get(offset+values.get(0)))+") failed: error code " + glXGetFBConfigErrorCode(err));
+    }
+    int j=0;
+    if (isMultisampleAvailable) {
+      caps.setSampleBuffers(values.get(j++) != 0);
+      caps.setNumSamples   (values.get(j++));
+    }
     final int alphaMask = ( null != xrmask ) ? xrmask.getAlphaMask() : 0;
-    res.setBackgroundOpaque( 0 >= alphaMask );
-    if( !res.isBackgroundOpaque() ) {
-        res.setTransparentRedValue(xrmask.getRedMask());
-        res.setTransparentGreenValue(xrmask.getGreenMask());
-        res.setTransparentBlueValue(xrmask.getBlueMask());
-        res.setTransparentAlphaValue(alphaMask);
+    caps.setBackgroundOpaque( 0 >= alphaMask );
+    if( !caps.isBackgroundOpaque() ) {
+        caps.setTransparentRedValue(xrmask.getRedMask());
+        caps.setTransparentGreenValue(xrmask.getGreenMask());
+        caps.setTransparentBlueValue(xrmask.getBlueMask());
+        caps.setTransparentAlphaValue(alphaMask);
     }
-    
-    try { 
-        res.setPbufferFloatingPointBuffers(glXGetFBConfig(display, fbcfg, GLXExt.GLX_FLOAT_COMPONENTS_NV, tmp, 0) != GL.GL_FALSE);
-    } catch (Exception e) {}
-
-    return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, res, drawableTypeBits );
+    // ALPHA shall be set at last - due to it's auto setting by the above (!opaque / samples)
+    caps.setDoubleBuffered(values.get(j++) != 0);
+    caps.setStereo        (values.get(j++) != 0);
+    caps.setHardwareAccelerated(values.get(j++) != GLX.GLX_SLOW_CONFIG);
+    caps.setRedBits       (values.get(j++));
+    caps.setGreenBits     (values.get(j++));
+    caps.setBlueBits      (values.get(j++));
+    caps.setAlphaBits     (values.get(j++));
+    caps.setAccumRedBits  (values.get(j++));
+    caps.setAccumGreenBits(values.get(j++));
+    caps.setAccumBlueBits (values.get(j++));
+    caps.setAccumAlphaBits(values.get(j++));
+    caps.setDepthBits     (values.get(j++));
+    caps.setStencilBits   (values.get(j++));
+
+    return (X11GLCapabilities) GLGraphicsConfigurationUtil.fixWinAttribBitsAndHwAccel(device, drawableTypeBits, caps);
   }
 
   private static String glXGetFBConfigErrorCode(int err) {
@@ -344,26 +415,27 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     }
   }
 
-  static int glXGetFBConfig(long display, long cfg, int attrib, int[] tmp, int tmp_offset) {
+  static int glXGetFBConfig(long display, long cfg, int attrib, IntBuffer tmp) {
     if (display == 0) {
       throw new GLException("No display connection");
     }
-    int res = GLX.glXGetFBConfigAttrib(display, cfg, attrib, tmp, tmp_offset);
+    int res = GLX.glXGetFBConfigAttrib(display, cfg, attrib, tmp);
     if (res != 0) {
       throw new GLException("glXGetFBConfig("+toHexString(attrib)+") failed: error code " + glXGetFBConfigErrorCode(res));
     }
-    return tmp[tmp_offset];
+    return tmp.get(tmp.position());
   }
 
   static int glXFBConfig2FBConfigID(long display, long cfg) {
-      int[] tmpID = new int[1];
-      return glXGetFBConfig(display, cfg, GLX.GLX_FBCONFIG_ID, tmpID, 0);
+      final IntBuffer tmpID = Buffers.newDirectIntBuffer(1);
+      return glXGetFBConfig(display, cfg, GLX.GLX_FBCONFIG_ID, tmpID);
   }
 
   static long glXFBConfigID2FBConfig(long display, int screen, int id) {
-      int[] attribs = new int[] { GLX.GLX_FBCONFIG_ID, id, 0 };
-      int[] count = { -1 };
-      PointerBuffer fbcfgsL = GLX.glXChooseFBConfig(display, screen, attribs, 0, count, 0);
+      final IntBuffer attribs = Buffers.newDirectIntBuffer(new int[] { GLX.GLX_FBCONFIG_ID, id, 0 });
+      final IntBuffer count = Buffers.newDirectIntBuffer(1);
+      count.put(0, -1);
+      PointerBuffer fbcfgsL = GLX.glXChooseFBConfig(display, screen, attribs, count);
       if (fbcfgsL == null || fbcfgsL.limit()<1) {
           return 0;
       }
@@ -379,7 +451,7 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
       XVisualInfo[] infos = X11Lib.XGetVisualInfo(display, X11Lib.VisualIDMask, template, count, 0);
       if (infos == null || infos.length == 0) {
             return null;
-      }  
+      }
       XVisualInfo res = XVisualInfo.create(infos[0]);
       if (DEBUG) {
         System.err.println("Fetched XVisualInfo for visual ID " + toHexString(visualID));
@@ -388,57 +460,49 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
       return res;
   }
 
-  static boolean XVisualInfo2GLCapabilities(ArrayList capsBucket,
-                                            GLProfile glp, long display, XVisualInfo info,
-                                            final int winattrmask, boolean isMultisampleEnabled) {
-    final int allDrawableTypeBits = GLGraphicsConfigurationUtil.WINDOW_BIT | GLGraphicsConfigurationUtil.BITMAP_BIT ;
+  static X11GLCapabilities XVisualInfo2GLCapabilities(final X11GraphicsDevice device, GLProfile glp, XVisualInfo info,
+                                                      final int winattrmask, boolean isMultisampleEnabled) {
+    final int allDrawableTypeBits = GLGraphicsConfigurationUtil.WINDOW_BIT |
+                                    GLGraphicsConfigurationUtil.BITMAP_BIT |
+                                    GLGraphicsConfigurationUtil.FBO_BIT ;
+
     final int drawableTypeBits = winattrmask & allDrawableTypeBits;
 
     if( 0 == drawableTypeBits ) {
-        return false;
+        return null;
     }
 
-    int[] tmp = new int[1];
-    int val = glXGetConfig(display, info, GLX.GLX_USE_GL, tmp, 0);
+    final long display = device.getHandle();
+    final IntBuffer tmp = Buffers.newDirectIntBuffer(1);
+    int val = glXGetConfig(display, info, GLX.GLX_USE_GL, tmp);
     if (val == 0) {
       if(DEBUG) {
         System.err.println("Visual ("+toHexString(info.getVisualid())+") does not support OpenGL");
       }
-      return false;
+      return null;
     }
-    val = glXGetConfig(display, info, GLX.GLX_RGBA, tmp, 0);
+    val = glXGetConfig(display, info, GLX.GLX_RGBA, tmp);
     if (val == 0) {
       if(DEBUG) {
         System.err.println("Visual ("+toHexString(info.getVisualid())+") does not support RGBA");
       }
-      return false;
+      return null;
     }
 
     GLCapabilities res = new X11GLCapabilities(info, glp);
 
-    res.setDoubleBuffered(glXGetConfig(display, info, GLX.GLX_DOUBLEBUFFER,     tmp, 0) != 0);
-    res.setStereo        (glXGetConfig(display, info, GLX.GLX_STEREO,           tmp, 0) != 0);
+    res.setDoubleBuffered(glXGetConfig(display, info, GLX.GLX_DOUBLEBUFFER,     tmp) != 0);
+    res.setStereo        (glXGetConfig(display, info, GLX.GLX_STEREO,           tmp) != 0);
     // Note: use of hardware acceleration is determined by
     // glXCreateContext, not by the XVisualInfo. Optimistically claim
     // that all GLCapabilities have the capability to be hardware
     // accelerated.
-    res.setHardwareAccelerated(true);
-    res.setDepthBits     (glXGetConfig(display, info, GLX.GLX_DEPTH_SIZE,       tmp, 0));
-    res.setStencilBits   (glXGetConfig(display, info, GLX.GLX_STENCIL_SIZE,     tmp, 0));
-    res.setRedBits       (glXGetConfig(display, info, GLX.GLX_RED_SIZE,         tmp, 0));
-    res.setGreenBits     (glXGetConfig(display, info, GLX.GLX_GREEN_SIZE,       tmp, 0));
-    res.setBlueBits      (glXGetConfig(display, info, GLX.GLX_BLUE_SIZE,        tmp, 0));
-    res.setAlphaBits     (glXGetConfig(display, info, GLX.GLX_ALPHA_SIZE,       tmp, 0));
-    res.setAccumRedBits  (glXGetConfig(display, info, GLX.GLX_ACCUM_RED_SIZE,   tmp, 0));
-    res.setAccumGreenBits(glXGetConfig(display, info, GLX.GLX_ACCUM_GREEN_SIZE, tmp, 0));
-    res.setAccumBlueBits (glXGetConfig(display, info, GLX.GLX_ACCUM_BLUE_SIZE,  tmp, 0));
-    res.setAccumAlphaBits(glXGetConfig(display, info, GLX.GLX_ACCUM_ALPHA_SIZE, tmp, 0));
     if (isMultisampleEnabled) {
-      res.setSampleBuffers(glXGetConfig(display, info, GLX.GLX_SAMPLE_BUFFERS, tmp, 0) != 0);
-      res.setNumSamples   (glXGetConfig(display, info, GLX.GLX_SAMPLES,        tmp, 0));
+      res.setSampleBuffers(glXGetConfig(display, info, GLX.GLX_SAMPLE_BUFFERS, tmp) != 0);
+      res.setNumSamples   (glXGetConfig(display, info, GLX.GLX_SAMPLES,        tmp));
     }
-    final XRenderDirectFormat xrmask = ( null != info ) ? 
-                                         XVisual2XRenderMask( display, info.getVisual() ) : 
+    final XRenderDirectFormat xrmask = ( null != info ) ?
+                                         XVisual2XRenderMask( display, info.getVisual() ) :
                                          null ;
     final int alphaMask = ( null != xrmask ) ? xrmask.getAlphaMask() : 0;
     res.setBackgroundOpaque( 0 >= alphaMask );
@@ -448,8 +512,20 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         res.setTransparentBlueValue(xrmask.getBlueMask());
         res.setTransparentAlphaValue(alphaMask);
     }
-
-    return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, res, drawableTypeBits);
+    // ALPHA shall be set at last - due to it's auto setting by the above (!opaque / samples)
+    res.setHardwareAccelerated(true);
+    res.setDepthBits     (glXGetConfig(display, info, GLX.GLX_DEPTH_SIZE,       tmp));
+    res.setStencilBits   (glXGetConfig(display, info, GLX.GLX_STENCIL_SIZE,     tmp));
+    res.setRedBits       (glXGetConfig(display, info, GLX.GLX_RED_SIZE,         tmp));
+    res.setGreenBits     (glXGetConfig(display, info, GLX.GLX_GREEN_SIZE,       tmp));
+    res.setBlueBits      (glXGetConfig(display, info, GLX.GLX_BLUE_SIZE,        tmp));
+    res.setAlphaBits     (glXGetConfig(display, info, GLX.GLX_ALPHA_SIZE,       tmp));
+    res.setAccumRedBits  (glXGetConfig(display, info, GLX.GLX_ACCUM_RED_SIZE,   tmp));
+    res.setAccumGreenBits(glXGetConfig(display, info, GLX.GLX_ACCUM_GREEN_SIZE, tmp));
+    res.setAccumBlueBits (glXGetConfig(display, info, GLX.GLX_ACCUM_BLUE_SIZE,  tmp));
+    res.setAccumAlphaBits(glXGetConfig(display, info, GLX.GLX_ACCUM_ALPHA_SIZE, tmp));
+
+    return (X11GLCapabilities) GLGraphicsConfigurationUtil.fixWinAttribBitsAndHwAccel(device, drawableTypeBits, res);
   }
 
   private static String glXGetConfigErrorCode(int err) {
@@ -462,17 +538,18 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     }
   }
 
-  static int glXGetConfig(long display, XVisualInfo info, int attrib, int[] tmp, int tmp_offset) {
+  static int glXGetConfig(long display, XVisualInfo info, int attrib, IntBuffer tmp) {
     if (display == 0) {
       throw new GLException("No display connection");
     }
-    int res = GLX.glXGetConfig(display, info, attrib, tmp, tmp_offset);
+    int res = GLX.glXGetConfig(display, info, attrib, tmp);
     if (res != 0) {
       throw new GLException("glXGetConfig("+toHexString(attrib)+") failed: error code " + glXGetConfigErrorCode(res));
     }
-    return tmp[tmp_offset];
+    return tmp.get(tmp.position());
   }
 
+  @Override
   public String toString() {
     return "X11GLXGraphicsConfiguration["+getScreen()+", visualID " + toHexString(getXVisualID()) + ", fbConfigID " + toHexString(getFBConfigID()) +
                                         ",\n\trequested " + getRequestedCapabilities()+
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java
index 0ec2f234c..1f92960bc 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -40,6 +40,7 @@ import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.nativewindow.VisualIDHolder;
+import javax.media.nativewindow.VisualIDHolder.VIDType;
 import javax.media.opengl.DefaultGLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
@@ -48,6 +49,7 @@ import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.nativewindow.x11.X11GraphicsDevice;
 import com.jogamp.nativewindow.x11.X11GraphicsScreen;
@@ -57,6 +59,7 @@ import jogamp.nativewindow.x11.XVisualInfo;
 import jogamp.opengl.GLGraphicsConfigurationFactory;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 
+import java.nio.IntBuffer;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
@@ -73,20 +76,25 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
     static GraphicsConfigurationFactory fallbackX11GraphicsConfigurationFactory = null;
     static void registerFactory() {
         final GraphicsConfigurationFactory newFactory = new X11GLXGraphicsConfigurationFactory();
-        final GraphicsConfigurationFactory oldFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, newFactory);
+        final GraphicsConfigurationFactory oldFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, GLCapabilitiesImmutable.class, newFactory);
         if(oldFactory == newFactory) {
             throw new InternalError("GraphicsConfigurationFactory lifecycle impl. error");
         }
-        if(null == oldFactory) {
-            throw new InternalError("Missing fallback GraphicsConfigurationFactory");
+        if(null != oldFactory) {
+            fallbackX11GraphicsConfigurationFactory = oldFactory;
+        } else {
+            fallbackX11GraphicsConfigurationFactory = GraphicsConfigurationFactory.getFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, CapabilitiesImmutable.class);
+            if( null == fallbackX11GraphicsConfigurationFactory ) {
+                throw new InternalError("Missing fallback GraphicsConfigurationFactory");
+            }
         }
-        fallbackX11GraphicsConfigurationFactory = oldFactory;
     }
     private X11GLXGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
-            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         if (!(absScreen instanceof X11GraphicsScreen)) {
             throw new IllegalArgumentException("Only X11GraphicsScreen are allowed here");
         }
@@ -102,38 +110,42 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         if (chooser != null && !(chooser instanceof GLCapabilitiesChooser)) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilitiesChooser objects");
         }
-        
+
         if(!GLXUtil.isGLXAvailableOnServer((X11GraphicsDevice)absScreen.getDevice())) {
             if(null != fallbackX11GraphicsConfigurationFactory) {
                 if(DEBUG) {
                     System.err.println("No GLX available, fallback to "+fallbackX11GraphicsConfigurationFactory.getClass().getSimpleName()+" for: "+absScreen);
                 }
-                return fallbackX11GraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen);
+                return fallbackX11GraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen, VisualIDHolder.VID_UNDEFINED);
             }
             throw new InternalError("No GLX and no fallback GraphicsConfigurationFactory available for: "+absScreen);
-        }        
+        }
         return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested,
-                                                 (GLCapabilitiesChooser)chooser, (X11GraphicsScreen)absScreen);
+                                                 (GLCapabilitiesChooser)chooser, (X11GraphicsScreen)absScreen, nativeVisualID);
     }
 
     protected static List<GLCapabilitiesImmutable> getAvailableCapabilities(X11GLXDrawableFactory factory, AbstractGraphicsDevice device) {
-        X11GLXDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResource(device);
+        X11GLXDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
         if(null == sharedResource) {
             throw new GLException("Shared resource for device n/a: "+device);
         }
         final X11GraphicsScreen sharedScreen = (X11GraphicsScreen) sharedResource.getScreen();
-        final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(sharedScreen.getDevice());
-        final X11GLXDrawable sharedDrawable = (X11GLXDrawable) sharedResource.getDrawable();
-        final GLCapabilitiesImmutable capsChosen = sharedDrawable.getChosenGLCapabilities();
-        final GLProfile glp = capsChosen.getGLProfile();
+        final X11GraphicsDevice sharedDevice = (X11GraphicsDevice) sharedScreen.getDevice();
+        final boolean isMultisampleAvailable = sharedResource.isGLXMultisampleAvailable();
+        final GLProfile glp = GLProfile.getDefault(device);
 
         List<GLCapabilitiesImmutable> availableCaps = null;
 
-        if( sharedResource.isGLXVersionGreaterEqualOneThree() ) {
-            availableCaps = getAvailableGLCapabilitiesFBConfig(sharedScreen, glp, isMultisampleAvailable);
-        }
-        if( null == availableCaps || availableCaps.isEmpty() ) {
-            availableCaps = getAvailableGLCapabilitiesXVisual(sharedScreen, glp, isMultisampleAvailable);
+        sharedDevice.lock();
+        try {
+            if( sharedResource.isGLXVersionGreaterEqualOneThree() ) {
+                availableCaps = getAvailableGLCapabilitiesFBConfig(sharedScreen, glp, isMultisampleAvailable);
+            }
+            if( null == availableCaps || availableCaps.isEmpty() ) {
+                availableCaps = getAvailableGLCapabilitiesXVisual(sharedScreen, glp, isMultisampleAvailable);
+            }
+        } finally {
+            sharedDevice.unlock();
         }
         if( null != availableCaps && availableCaps.size() > 1 ) {
             Collections.sort(availableCaps, XVisualIDComparator);
@@ -146,33 +158,35 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
 
         // Utilizing FBConfig
         //
-        AbstractGraphicsDevice absDevice = x11Screen.getDevice();
-        long display = absDevice.getHandle();
+        final X11GraphicsDevice absDevice = (X11GraphicsDevice) x11Screen.getDevice();
+        final long display = absDevice.getHandle();
 
-        int screen = x11Screen.getIndex();
-        int[] count = { -1 };
-        ArrayList<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
+        final int screen = x11Screen.getIndex();
+        final IntBuffer count = Buffers.newDirectIntBuffer(1);
+        count.put(0, -1);
+        final ArrayList<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
 
-        fbcfgsL = GLX.glXChooseFBConfig(display, screen, null, 0, count, 0);
+        fbcfgsL = GLX.glXChooseFBConfig(display, screen, null, count);
         if (fbcfgsL == null || fbcfgsL.limit()<=0) {
             if(DEBUG) {
-                System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesFBConfig: Failed glXChooseFBConfig ("+x11Screen+"): "+fbcfgsL+", "+count[0]);
+                System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesFBConfig: Failed glXChooseFBConfig ("+x11Screen+"): "+fbcfgsL+", "+count.get(0));
             }
             return null;
         }
         for (int i = 0; i < fbcfgsL.limit(); i++) {
-            if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, display, fbcfgsL.get(i), GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
-                if(DEBUG) {
-                    System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesFBConfig: FBConfig invalid (2): ("+x11Screen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
-                }
+            final GLCapabilitiesImmutable caps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(absDevice, glProfile, fbcfgsL.get(i), GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable);
+            if(null != caps) {
+                availableCaps.add(caps);
+            } else if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesFBConfig: FBConfig invalid (2): ("+x11Screen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
             }
         }
         return availableCaps;
     }
 
     static List<GLCapabilitiesImmutable> getAvailableGLCapabilitiesXVisual(X11GraphicsScreen x11Screen, GLProfile glProfile, boolean isMultisampleAvailable) {
-        AbstractGraphicsDevice absDevice = x11Screen.getDevice();
-        long display = absDevice.getHandle();
+        final X11GraphicsDevice absDevice = (X11GraphicsDevice) x11Screen.getDevice();
+        final long display = absDevice.getHandle();
 
         int screen = x11Screen.getIndex();
 
@@ -185,10 +199,11 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         }
         ArrayList<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
         for (int i = 0; i < infos.length; i++) {
-            if( !X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(availableCaps, glProfile, display, infos[i], GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
-                if(DEBUG) {
-                    System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesXVisual: XVisual invalid: ("+x11Screen+"): fbcfg: "+toHexString(infos[i].getVisualid()));
-                }
+            final GLCapabilitiesImmutable caps = X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(absDevice, glProfile, infos[i], GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable);
+            if(null != caps) {
+                availableCaps.add(caps);
+            } if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesXVisual: XVisual invalid: ("+x11Screen+"): fbcfg: "+toHexString(infos[i].getVisualid()));
             }
         }
         return availableCaps;
@@ -198,42 +213,46 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
     static X11GLXGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
                                                                          GLCapabilitiesImmutable capsReq,
                                                                          GLCapabilitiesChooser chooser,
-                                                                         X11GraphicsScreen x11Screen) {
+                                                                         X11GraphicsScreen x11Screen, int xvisualID) {
         if (x11Screen == null) {
             throw new IllegalArgumentException("AbstractGraphicsScreen is null");
         }
-
         if (capsChosen == null) {
             capsChosen = new GLCapabilities(null);
         }
-        X11GraphicsDevice x11Device = (X11GraphicsDevice) x11Screen.getDevice();        
+        X11GraphicsDevice x11Device = (X11GraphicsDevice) x11Screen.getDevice();
         X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
 
-        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, factory.canCreateGLPbuffer(x11Device) );
-        boolean usePBuffer = capsChosen.isPBuffer();
-    
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, factory, x11Device);
+        final boolean usePBuffer = !capsChosen.isOnscreen() && capsChosen.isPBuffer();
+
         X11GLXGraphicsConfiguration res = null;
-        if( factory.isGLXVersionGreaterEqualOneThree(x11Device) ) {
-            res = chooseGraphicsConfigurationFBConfig(capsChosen, capsReq, chooser, x11Screen);
-        }
-        if(null==res) {
-            if(usePBuffer) {
-                throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig for "+capsChosen);
+        x11Device.lock();
+        try {
+            if( factory.isGLXVersionGreaterEqualOneThree(x11Device) ) {
+                res = chooseGraphicsConfigurationFBConfig(capsChosen, capsReq, chooser, x11Screen, xvisualID);
+            }
+            if(null==res) {
+                if(usePBuffer) {
+                    throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig for visualID "+toHexString(xvisualID)+", "+capsChosen);
+                }
+                res = chooseGraphicsConfigurationXVisual(capsChosen, capsReq, chooser, x11Screen, xvisualID);
             }
-            res = chooseGraphicsConfigurationXVisual(capsChosen, capsReq, chooser, x11Screen);
+        } finally {
+            x11Device.unlock();
         }
         if(null==res) {
-            throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig and XVisual for "+capsChosen);
+            throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig and XVisual for visualID "+toHexString(xvisualID)+", "+x11Screen+", "+capsChosen);
         }
         if(DEBUG) {
-            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationStatic("+x11Screen+","+capsChosen+"): "+res);
+            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationStatic(visualID "+toHexString(xvisualID)+", "+x11Screen+","+capsChosen+"): "+res);
         }
         return res;
     }
 
     static X11GLXGraphicsConfiguration fetchGraphicsConfigurationFBConfig(X11GraphicsScreen x11Screen, int fbID, GLProfile glp) {
-        final AbstractGraphicsDevice absDevice = x11Screen.getDevice();
-        final long display = absDevice.getHandle();
+        final X11GraphicsDevice x11Device = (X11GraphicsDevice) x11Screen.getDevice();
+        final long display = x11Device.getHandle();
         final int screen = x11Screen.getIndex();
 
         final long fbcfg = X11GLXGraphicsConfiguration.glXFBConfigID2FBConfig(display, screen, fbID);
@@ -244,55 +263,60 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
             return null;
         }
         final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
-               
-        final X11GLCapabilities caps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glp, display, fbcfg, true, true, true, factory.isGLXMultisampleAvailable(absDevice));
+
+        final X11GLCapabilities caps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(x11Device, glp, fbcfg, GLGraphicsConfigurationUtil.ALL_BITS, factory.isGLXMultisampleAvailable(x11Device));
         return new X11GLXGraphicsConfiguration(x11Screen, caps, caps, new DefaultGLCapabilitiesChooser());
     }
 
     private static X11GLXGraphicsConfiguration chooseGraphicsConfigurationFBConfig(GLCapabilitiesImmutable capsChosen,
                                                                                    GLCapabilitiesImmutable capsReq,
                                                                                    GLCapabilitiesChooser chooser,
-                                                                                   X11GraphicsScreen x11Screen) {
+                                                                                   X11GraphicsScreen x11Screen, int xvisualID) {
         int recommendedIndex = -1;
         PointerBuffer fbcfgsL = null;
         GLProfile glProfile = capsChosen.getGLProfile();
-        boolean onscreen = capsChosen.isOnscreen();
-        boolean usePBuffer = capsChosen.isPBuffer();
 
         // Utilizing FBConfig
         //
-        AbstractGraphicsDevice absDevice = x11Screen.getDevice();
-        long display = absDevice.getHandle();
+        X11GraphicsDevice x11Device = (X11GraphicsDevice) x11Screen.getDevice();
+        long display = x11Device.getHandle();
         int screen = x11Screen.getIndex();
-        
-        final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();                              
-        final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(absDevice);
-        int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capsChosen, true, isMultisampleAvailable, display, screen);
-        int[] count = { -1 };
-        ArrayList/*<X11GLCapabilities>*/ availableCaps = new ArrayList();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
 
-        // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice
-        fbcfgsL = GLX.glXChooseFBConfig(display, screen, attribs, 0, count, 0);
-        if (fbcfgsL != null && fbcfgsL.limit()>0) {
-            for (int i = 0; i < fbcfgsL.limit(); i++) {
-                if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, display, fbcfgsL.get(i), winattrmask, isMultisampleAvailable) ) {
-                    if(DEBUG) {
-                        System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: FBConfig invalid (1): ("+x11Screen+","+capsChosen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
-                    }
-                }
-            }
+        final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
+        final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(x11Device);
+        final IntBuffer attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capsChosen, true, isMultisampleAvailable, display, screen);
+        final IntBuffer count = Buffers.newDirectIntBuffer(1);
+        count.put(0, -1);
+        final int winattrmask = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(capsChosen);
+        List<GLCapabilitiesImmutable> availableCaps;
+        // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice,
+        // skipped if xvisualID is given
+        final boolean hasGLXChosenCaps;
+        if( VisualIDHolder.VID_UNDEFINED == xvisualID ) {
+            fbcfgsL = GLX.glXChooseFBConfig(display, screen, attribs, count);
+            hasGLXChosenCaps = fbcfgsL != null && fbcfgsL.limit()>0;
+        } else {
+            hasGLXChosenCaps = false;
+        }
+        final boolean useRecommendedIndex = hasGLXChosenCaps && capsChosen.isBackgroundOpaque(); // only use recommended idx if not translucent
+        final boolean skipCapsChooser = null == chooser && useRecommendedIndex; // fast path: skip choosing if using recommended idx and null chooser is used
+        if (hasGLXChosenCaps) {
+            availableCaps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(x11Device, glProfile, fbcfgsL, winattrmask, isMultisampleAvailable, skipCapsChooser /* onlyFirstValid */);
             if(availableCaps.size() > 0) {
-                recommendedIndex = capsChosen.isBackgroundOpaque() ? 0 : -1; // only use recommended idx if not translucent
+                recommendedIndex = useRecommendedIndex ? 0 : -1;
                 if (DEBUG) {
                     System.err.println("glXChooseFBConfig recommended fbcfg " + toHexString(fbcfgsL.get(0)) + ", idx " + recommendedIndex);
+                    System.err.println("useRecommendedIndex "+useRecommendedIndex+", skipCapsChooser "+skipCapsChooser);
                     System.err.println("user  caps " + capsChosen);
-                    System.err.println("fbcfg caps " + availableCaps.get(0));
+                    System.err.println("fbcfg caps " + fbcfgsL.limit()+", availCaps "+availableCaps.get(0));
                 }
             } else if (DEBUG) {
                 System.err.println("glXChooseFBConfig no caps for recommended fbcfg " + toHexString(fbcfgsL.get(0)));
+                System.err.println("useRecommendedIndex "+useRecommendedIndex+", skipCapsChooser "+skipCapsChooser);
                 System.err.println("user  caps " + capsChosen);
             }
+        } else {
+            availableCaps = new ArrayList<GLCapabilitiesImmutable>();
         }
 
         // 2nd choice: get all GLCapabilities available, no preferred recommendedIndex available
@@ -300,23 +324,48 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
             // reset ..
             recommendedIndex = -1;
 
-            fbcfgsL = GLX.glXChooseFBConfig(display, screen, null, 0, count, 0);
+            fbcfgsL = GLX.glXChooseFBConfig(display, screen, null, count);
             if (fbcfgsL == null || fbcfgsL.limit()<=0) {
                 if(DEBUG) {
-                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: Failed glXChooseFBConfig ("+x11Screen+","+capsChosen+"): "+fbcfgsL+", "+count[0]);
+                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: Failed glXChooseFBConfig ("+x11Screen+","+capsChosen+"): "+fbcfgsL+", "+count.get(0));
                 }
                 return null;
             }
+            availableCaps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(x11Device, glProfile, fbcfgsL, winattrmask, isMultisampleAvailable, false /* onlyOneValid */);
+        }
+
+        if(DEBUG) {
+            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: got configs: "+availableCaps.size());
+            for(int i=0; i<availableCaps.size(); i++) {
+                System.err.println(i+": "+availableCaps.get(i));
+            }
+        }
 
-            for (int i = 0; i < fbcfgsL.limit(); i++) {
-                if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, display, fbcfgsL.get(i), winattrmask, isMultisampleAvailable) ) {
-                    if(DEBUG) {
-                        System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: FBConfig invalid (2): ("+x11Screen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
-                    }
+        if( VisualIDHolder.VID_UNDEFINED != xvisualID ) { // implies !hasGLXChosenCaps
+            for(int i=0; i<availableCaps.size(); ) {
+                final VisualIDHolder vidh = availableCaps.get(i);
+                if(vidh.getVisualID(VIDType.X11_XVISUAL) != xvisualID ) {
+                    availableCaps.remove(i);
+                } else {
+                    i++;
+                }
+            }
+            if(0==availableCaps.size()) {
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: post filter visualID "+toHexString(xvisualID )+" no config found, failed - return null");
                 }
+                return null;
+            } else if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: post filter visualID "+toHexString(xvisualID)+" got configs: "+availableCaps.size());
             }
         }
-        int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
+
+        final int chosenIndex;
+        if( skipCapsChooser && 0 <= recommendedIndex ) {
+            chosenIndex = recommendedIndex;
+        } else {
+            chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
+        }
         if ( 0 > chosenIndex ) {
             if (DEBUG) {
                 System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: failed, return null");
@@ -332,32 +381,36 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
     private static X11GLXGraphicsConfiguration chooseGraphicsConfigurationXVisual(GLCapabilitiesImmutable capsChosen,
                                                                                   GLCapabilitiesImmutable capsReq,
                                                                                   GLCapabilitiesChooser chooser,
-                                                                                  X11GraphicsScreen x11Screen) {
+                                                                                  X11GraphicsScreen x11Screen, int xvisualID) {
         if (chooser == null) {
             chooser = new DefaultGLCapabilitiesChooser();
         }
 
         GLProfile glProfile = capsChosen.getGLProfile();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(capsChosen.isOnscreen(), false /* pbuffer */);
-        ArrayList availableCaps = new ArrayList();
+        final int winattrmask = GLGraphicsConfigurationUtil.getExclusiveWinAttributeBits(capsChosen.isOnscreen(), capsChosen.isFBO(), false /* pbuffer */, capsChosen.isBitmap());
+        List<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
         int recommendedIndex = -1;
 
-        AbstractGraphicsDevice absDevice = x11Screen.getDevice();
+        X11GraphicsDevice absDevice = (X11GraphicsDevice) x11Screen.getDevice();
         long display = absDevice.getHandle();
         int screen = x11Screen.getIndex();
-        
-        final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();                              
-        final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(absDevice);        
-        int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capsChosen, false, isMultisampleAvailable, display, screen);
 
+        final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
+        final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(absDevice);
+        final IntBuffer attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capsChosen, false, isMultisampleAvailable, display, screen);
+
+        XVisualInfo recommendedVis = null;
         // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice
-        XVisualInfo recommendedVis = GLX.glXChooseVisual(display, screen, attribs, 0);
-        if (DEBUG) {
-            System.err.print("glXChooseVisual recommended ");
-            if (recommendedVis == null) {
-                System.err.println("null visual");
-            } else {
-                System.err.println("visual id " + toHexString(recommendedVis.getVisualid()));
+        // skipped if xvisualID is given
+        if( VisualIDHolder.VID_UNDEFINED == xvisualID ) {
+            recommendedVis = GLX.glXChooseVisual(display, screen, attribs);
+            if (DEBUG) {
+                System.err.print("glXChooseVisual recommended ");
+                if (recommendedVis == null) {
+                    System.err.println("null visual");
+                } else {
+                    System.err.println("visual id " + toHexString(recommendedVis.getVisualid()));
+                }
             }
         }
 
@@ -371,15 +424,41 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         }
 
         for (int i = 0; i < infos.length; i++) {
-            if( !X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(availableCaps, glProfile, display, infos[i], winattrmask, isMultisampleAvailable) ) {
-                if(DEBUG) {
-                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: XVisual invalid: ("+x11Screen+"): fbcfg: "+toHexString(infos[i].getVisualid()));
-                }
-            } else {
+            final GLCapabilitiesImmutable caps = X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(absDevice, glProfile, infos[i], winattrmask, isMultisampleAvailable);
+            if( null != caps ) {
+                availableCaps.add(caps);
                 // Attempt to find the visual chosenIndex by glXChooseVisual, if not translucent
                 if (capsChosen.isBackgroundOpaque() && recommendedVis != null && recommendedVis.getVisualid() == infos[i].getVisualid()) {
                     recommendedIndex = availableCaps.size() - 1;
                 }
+            } else if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: XVisual invalid: ("+x11Screen+"): fbcfg: "+toHexString(infos[i].getVisualid()));
+            }
+        }
+
+        if(DEBUG) {
+            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: got configs: "+availableCaps.size());
+            for(int i=0; i<availableCaps.size(); i++) {
+                System.err.println(i+": "+availableCaps.get(i));
+            }
+        }
+
+        if( VisualIDHolder.VID_UNDEFINED != xvisualID ) {
+            for(int i=0; i<availableCaps.size(); ) {
+                VisualIDHolder vidh = availableCaps.get(i);
+                if(vidh.getVisualID(VIDType.X11_XVISUAL) != xvisualID ) {
+                    availableCaps.remove(i);
+                } else {
+                    i++;
+                }
+            }
+            if(0==availableCaps.size()) {
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: post filter visualID "+toHexString(xvisualID )+" no config found, failed - return null");
+                }
+                return null;
+            } else if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: post filter visualID "+toHexString(xvisualID)+" got configs: "+availableCaps.size());
             }
         }
 
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXContext.java
deleted file mode 100644
index ce5d466d4..000000000
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXContext.java
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-package jogamp.opengl.x11.glx;
-
-import javax.media.opengl.*;
-
-public class X11OnscreenGLXContext extends X11GLXContext {
-
-    public X11OnscreenGLXContext(X11OnscreenGLXDrawable drawable, GLContext shareWith) {
-        super(drawable, shareWith);
-    }
-}
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java
index b2a8326cb..9da189290 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,19 +29,21 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.x11.glx;
 
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLException;
 
 public class X11OnscreenGLXDrawable extends X11GLXDrawable {
   /** GLXWindow can't be made current on AWT with NVidia driver, hence disabled for now */
@@ -49,33 +51,38 @@ public class X11OnscreenGLXDrawable extends X11GLXDrawable {
   long glXWindow; // GLXWindow, a GLXDrawable representation
   boolean useGLXWindow;
 
-  protected X11OnscreenGLXDrawable(GLDrawableFactory factory, NativeSurface component) {
-    super(factory, component, false);
+  protected X11OnscreenGLXDrawable(GLDrawableFactory factory, NativeSurface component, boolean realized) {
+    super(factory, component, realized);
     glXWindow=0;
     useGLXWindow=false;
+    if(realized) {
+        createHandle();
+    }
   }
 
-  @SuppressWarnings("unused")
   @Override
   public long getHandle() {
-    if(USE_GLXWINDOW && useGLXWindow) {
-        return glXWindow; 
-    } 
+    if(USE_GLXWINDOW) {
+        if(useGLXWindow) {
+            return glXWindow;
+        }
+    }
     return super.getHandle();
   }
 
-  @SuppressWarnings("unused")
   @Override
   protected void destroyHandle() {
-    if(USE_GLXWINDOW && 0!=glXWindow) {
-        GLX.glXDestroyWindow(getNativeSurface().getDisplayHandle(), glXWindow);
-        glXWindow = 0;
-        useGLXWindow=false;
+    if(USE_GLXWINDOW) {
+        if(0!=glXWindow) {
+            GLX.glXDestroyWindow(getNativeSurface().getDisplayHandle(), glXWindow);
+            glXWindow = 0;
+            useGLXWindow=false;
+        }
     }
   }
 
   @Override
-  protected final void updateHandle() {
+  protected final void createHandle() {
     if(USE_GLXWINDOW) {
         X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)getNativeSurface().getGraphicsConfiguration();
         if(config.getFBConfig()>=0) {
@@ -84,7 +91,7 @@ public class X11OnscreenGLXDrawable extends X11GLXDrawable {
             if(0!=glXWindow) {
                 GLX.glXDestroyWindow(dpy, glXWindow);
             }
-            glXWindow = GLX.glXCreateWindow(dpy, config.getFBConfig(), getNativeSurface().getSurfaceHandle(), null, 0);
+            glXWindow = GLX.glXCreateWindow(dpy, config.getFBConfig(), getNativeSurface().getSurfaceHandle(), null);
             if (DEBUG) {
               System.err.println("X11OnscreenGLXDrawable.setRealized(true): glXWindow: "+toHexString(getNativeSurface().getSurfaceHandle())+" -> "+toHexString(glXWindow));
             }
@@ -95,7 +102,8 @@ public class X11OnscreenGLXDrawable extends X11GLXDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new X11OnscreenGLXContext(this, shareWith);
+    return new X11GLXContext(this, shareWith);
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXContext.java
deleted file mode 100644
index 765a8207a..000000000
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXContext.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.x11.glx;
-
-import javax.media.opengl.*;
-
-public class X11PbufferGLXContext extends X11GLXContext {
-
-  public X11PbufferGLXContext(X11PbufferGLXDrawable drawable, GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  public void bindPbufferToTexture() {
-    // FIXME: figure out how to implement this
-    throw new GLException("Not yet implemented");
-  }
-
-  public void releasePbufferFromTexture() {
-    // FIXME: figure out how to implement this
-    throw new GLException("Not yet implemented");
-  }
-
-
-  public int getFloatingPointMode() {
-    return ((X11PbufferGLXDrawable)drawable).getFloatingPointMode();
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java
index da7b535cb..0e771fd0f 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,32 +29,38 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.x11.glx;
 
-import javax.media.opengl.*;
-import javax.media.nativewindow.*;
+import java.nio.IntBuffer;
+
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.AbstractGraphicsScreen;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLException;
+
+import com.jogamp.common.nio.Buffers;
 
 public class X11PbufferGLXDrawable extends X11GLXDrawable {
   protected X11PbufferGLXDrawable(GLDrawableFactory factory, NativeSurface target) {
-                                  /* GLCapabilities caps, 
+                                  /* GLCapabilities caps,
                                   GLCapabilitiesChooser chooser,
                                   int width, int height */
     super(factory, target, false);
   }
 
-  protected void destroyImpl() {
-    setRealized(false);
-  }
-  
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         createPbuffer();
@@ -63,8 +69,9 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new X11PbufferGLXContext(this, shareWith);
+    return new X11GLXContext(this, shareWith);
   }
 
   protected void destroyPbuffer() {
@@ -72,69 +79,50 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
     if (ns.getSurfaceHandle() != 0) {
       GLX.glXDestroyPbuffer(ns.getDisplayHandle(), ns.getSurfaceHandle());
     }
-    ((SurfaceChangeable)ns).setSurfaceHandle(0);
+    ((MutableSurface)ns).setSurfaceHandle(0);
+    if (DEBUG) {
+        System.err.println(getThreadName()+": Destroyed pbuffer " + this);
+    }
   }
 
   private void createPbuffer() {
-      X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration) getNativeSurface().getGraphicsConfiguration();
-      AbstractGraphicsScreen aScreen = config.getScreen();
-      AbstractGraphicsDevice aDevice = aScreen.getDevice();
-      long display = aDevice.getHandle();
+      final MutableSurface ms = (MutableSurface) getNativeSurface();
+      final X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration) ms.getGraphicsConfiguration();
+      final AbstractGraphicsScreen aScreen = config.getScreen();
+      final AbstractGraphicsDevice aDevice = aScreen.getDevice();
+      final long display = aDevice.getHandle();
 
       if (DEBUG) {
-        System.out.println("Pbuffer config: " + config);
+        System.out.println(getThreadName()+": Pbuffer config: " + config);
       }
 
       if (display==0) {
         throw new GLException("Null display");
       }
 
-      NativeSurface ns = getNativeSurface();
-    
-      GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
-
-      if (chosenCaps.getPbufferRenderToTexture()) {
-        throw new GLException("Render-to-texture pbuffers not supported yet on X11");
-      }
-
-      if (chosenCaps.getPbufferRenderToTextureRectangle()) {
-        throw new GLException("Render-to-texture-rectangle pbuffers not supported yet on X11");
-      }
-
       // Create the p-buffer.
       int niattribs = 0;
-      int[] iattributes = new int[5];
+      IntBuffer iattributes = Buffers.newDirectIntBuffer(7);
 
-      iattributes[niattribs++] = GLX.GLX_PBUFFER_WIDTH;
-      iattributes[niattribs++] = ns.getWidth();
-      iattributes[niattribs++] = GLX.GLX_PBUFFER_HEIGHT;
-      iattributes[niattribs++] = ns.getHeight();
-      iattributes[niattribs++] = 0;
+      iattributes.put(niattribs++, GLX.GLX_PBUFFER_WIDTH);
+      iattributes.put(niattribs++, ms.getWidth());
+      iattributes.put(niattribs++, GLX.GLX_PBUFFER_HEIGHT);
+      iattributes.put(niattribs++, ms.getHeight());
+      iattributes.put(niattribs++, GLX.GLX_LARGEST_PBUFFER); // exact
+      iattributes.put(niattribs++, 0);
+      iattributes.put(niattribs++, 0);
 
-      long pbuffer = GLX.glXCreatePbuffer(display, config.getFBConfig(), iattributes, 0);
+      long pbuffer = GLX.glXCreatePbuffer(display, config.getFBConfig(), iattributes);
       if (pbuffer == 0) {
         // FIXME: query X error code for detail error message
         throw new GLException("pbuffer creation error: glXCreatePbuffer() failed");
       }
 
       // Set up instance variables
-      ((SurfaceChangeable)ns).setSurfaceHandle(pbuffer);
-      
-      // Determine the actual width and height we were able to create.
-      int[] tmp = new int[1];
-      GLX.glXQueryDrawable(display, pbuffer, GLX.GLX_WIDTH, tmp, 0);
-      int width = tmp[0];
-      GLX.glXQueryDrawable(display, pbuffer, GLX.GLX_HEIGHT, tmp, 0);
-      int height = tmp[0];
-      ((SurfaceChangeable)ns).surfaceSizeChanged(width, height);
-      
+      ms.setSurfaceHandle(pbuffer);
+
       if (DEBUG) {
-        System.err.println("Created pbuffer " + this);
+        System.err.println(getThreadName()+": Created pbuffer " + this);
       }
   }
-
-  public int getFloatingPointMode() {
-    // Floating-point pbuffers currently require NVidia hardware on X11
-    return GLPbuffer.NV_FLOAT;
-  }
 }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXContext.java
deleted file mode 100644
index e19dfd1b3..000000000
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXContext.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.x11.glx;
-
-import javax.media.opengl.*;
-
-public class X11PixmapGLXContext extends X11GLXContext {
-
-  public X11PixmapGLXContext(X11PixmapGLXDrawable drawable,
-                               GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  public int getOffscreenContextPixelDataType() {
-    GL gl = getGL();
-    return gl.isGL2GL3()?GL2GL3.GL_UNSIGNED_INT_8_8_8_8_REV:GL.GL_UNSIGNED_SHORT_5_5_5_1;
-  }
-  
-  public int getOffscreenContextReadBuffer() {
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)drawable.getNativeSurface().getGraphicsConfiguration().getChosenCapabilities();
-    if (caps.getDoubleBuffered()) {
-      return GL.GL_BACK;
-    }
-    return GL.GL_FRONT;
-  }
-
-  public boolean offscreenImageNeedsVerticalFlip() {
-    // There doesn't seem to be a way to do this in the construction
-    // of the Pixmap or GLXPixmap
-    return true;
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java
index 7dae20f80..c1388db8a 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,20 +29,27 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.x11.glx;
 
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import jogamp.nativewindow.x11.*;
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.AbstractGraphicsScreen;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLException;
+
+import jogamp.nativewindow.x11.X11Lib;
+import jogamp.nativewindow.x11.XVisualInfo;
 
 public class X11PixmapGLXDrawable extends X11GLXDrawable {
   private long pixmap;
@@ -51,10 +58,7 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
     super(factory, target, false);
   }
 
-  protected void destroyImpl() {
-    setRealized(false);
-  }
-  
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         createPixmap();
@@ -63,10 +67,11 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new X11PixmapGLXContext(this, shareWith);
+    return new X11GLXContext(this, shareWith);
   }
-  
+
   private void createPixmap() {
     NativeSurface ns = getNativeSurface();
     X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration) ns.getGraphicsConfiguration();
@@ -88,9 +93,9 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
         pixmap = 0;
         throw new GLException("glXCreateGLXPixmap failed");
     }
-    ((SurfaceChangeable)ns).setSurfaceHandle(drawable);
+    ((MutableSurface)ns).setSurfaceHandle(drawable);
     if (DEBUG) {
-        System.err.println("Created pixmap " + toHexString(pixmap) +
+        System.err.println(getThreadName()+": Created pixmap " + toHexString(pixmap) +
                            ", GLXPixmap " + toHexString(drawable) +
                            ", display " + toHexString(dpy));
     }
@@ -104,7 +109,7 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
 
     long drawable = ns.getSurfaceHandle();
     if (DEBUG) {
-        System.err.println("Destroying pixmap " + toHexString(pixmap) +
+        System.err.println(getThreadName()+": Destroying pixmap " + toHexString(pixmap) +
                            ", GLXPixmap " + toHexString(drawable) +
                            ", display " + toHexString(display));
     }
@@ -128,7 +133,7 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
     X11Lib.XFreePixmap(display, pixmap);
     drawable = 0;
     pixmap = 0;
-    ((SurfaceChangeable)ns).setSurfaceHandle(0);
+    ((MutableSurface)ns).setSurfaceHandle(0);
     display = 0;
   }
 }