Merge remote-tracking branch 'upstream/master'

67 files changed, 2472 insertions, 1942 deletions

diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass-weight.fp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass-weight.fp
index 06edbeaee..fb71abd14 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass-weight.fp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass-weight.fp
@@ -7,6 +7,7 @@
 #if __VERSION__ >= 130

   #define varying in

   out vec4 mgl_FragColor;

+  #define texture2D texture

 #else

   #define mgl_FragColor gl_FragColor

 #endif

diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass.fp b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass.fp
index 07a005709..8e5600dd9 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass.fp
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/shader/curverenderer01-2pass.fp
@@ -7,6 +7,7 @@
 #if __VERSION__ >= 130
   #define varying in
   out vec4 mgl_FragColor;
+  #define texture2D texture
 #else
   #define mgl_FragColor gl_FragColor
 #endif
diff --git a/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java b/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java
index 0f762e79c..8479c08ca 100644
--- a/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java
+++ b/src/jogl/classes/jogamp/graph/font/typecast/TypecastFontConstructor.java
@@ -71,7 +71,7 @@ public class TypecastFontConstructor implements FontConstructor  {
                 int len=0;
                 Font f = null;
                 try {         
-                    tf = IOUtil.createTempFile( "jogl.font", ".ttf", false, null);
+                    tf = IOUtil.createTempFile( "jogl.font", ".ttf", false);
                     len = IOUtil.copyURLConn2File(fconn, tf);
                     if(len==0) {
                         tf.delete();
diff --git a/src/jogl/classes/jogamp/opengl/Debug.java b/src/jogl/classes/jogamp/opengl/Debug.java
index 4287c1960..b88a09b71 100644
--- a/src/jogl/classes/jogamp/opengl/Debug.java
+++ b/src/jogl/classes/jogamp/opengl/Debug.java
@@ -1,5 +1,6 @@
 /*
- * 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
@@ -39,6 +40,9 @@
 
 package jogamp.opengl;
 
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+
 import com.jogamp.common.util.PropertyAccess;
 
 /** Helper routines for logging and debugging. */
@@ -49,7 +53,12 @@ public class Debug extends PropertyAccess {
   private static final boolean debugAll;
   
   static {
-    PropertyAccess.addTrustedPrefix("jogl.", Debug.class);
+    AccessController.doPrivileged(new PrivilegedAction<Object>() {
+        public Object run() {
+            PropertyAccess.addTrustedPrefix("jogl.");
+            return null;
+    } } );
+    
     verbose = isPropertyDefined("jogl.verbose", true);
     debugAll = isPropertyDefined("jogl.debug", true);
     if (verbose) {
@@ -59,28 +68,19 @@ public class Debug extends PropertyAccess {
        System.err.println("JOGL implementation vendor " + p.getImplementationVendor());
     }
   }
-
-  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..ef9477a31 100644
--- a/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLibraryBundleInfo.java
@@ -32,7 +32,7 @@ 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>();
 
@@ -49,7 +49,7 @@ public abstract class DesktopGLDynamicLibraryBundleInfo extends GLDynamicLibrary
     }
     
     @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..8eb3468ed 100644
--- a/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLookupHelper.java
+++ b/src/jogl/classes/jogamp/opengl/DesktopGLDynamicLookupHelper.java
@@ -37,9 +37,9 @@ public class DesktopGLDynamicLookupHelper extends GLDynamicLookupHelper {
         super(info);
     }
 
-    public DesktopGLDynamicLibraryBundleInfo getDesktopGLBundleInfo() { return (DesktopGLDynamicLibraryBundleInfo) getBundleInfo(); }
+    public final DesktopGLDynamicLibraryBundleInfo getDesktopGLBundleInfo() { return (DesktopGLDynamicLibraryBundleInfo) getBundleInfo(); }
 
-    public synchronized boolean loadGLULibrary() {
+    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 7c7ea1508..94acf93b0 100644
--- a/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
+++ b/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
@@ -219,17 +219,17 @@ final class ExtensionAvailabilityCache {
           System.err.println(getThreadName() + ":ExtensionAvailabilityCache: ALL EXTENSIONS: "+availableExtensionCache.size());
       }
 
-      if(!context.isGLES()) {
-          final VersionNumber version = context.getGLVersionNumber();
-          int major[] = new int[] { version.getMajor() };
-          int minor[] = new int[] { version.getMinor() };
-          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() };          
+      while (GLContext.isValidGLVersion(ctxOptions, major[0], minor[0])) {
+          final String GL_XX_VERSION = ( context.isGLES() ? "GL_ES_VERSION_" : "GL_VERSION_" ) + major[0] + "_" + minor[0];
+          availableExtensionCache.add(GL_XX_VERSION);
+          if (DEBUG) {
+              System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Added "+GL_XX_VERSION+" to known extensions");
           }
+          if(!GLContext.decrementGLVersion(ctxOptions, major, minor)) break;
       }
 
       // put a dummy var in here so that the cache is no longer empty even if
diff --git a/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java b/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java
index 78ab7cc93..17646cc7b 100644
--- a/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java
+++ b/src/jogl/classes/jogamp/opengl/GLBufferSizeTracker.java
@@ -87,6 +87,13 @@ import com.jogamp.common.util.IntLongHashMap;
  */
 
 public class GLBufferSizeTracker {
+  protected static final boolean DEBUG;
+
+  static {
+      Debug.initSingleton();
+      DEBUG = Debug.isPropertyDefined("jogl.debug.GLBufferSizeTracker", true);
+  }
+  
   // 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
@@ -95,8 +102,7 @@ public class GLBufferSizeTracker {
   // 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);
diff --git a/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java b/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java
index 7f5316fbd..890c82c90 100644
--- a/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java
+++ b/src/jogl/classes/jogamp/opengl/GLBufferStateTracker.java
@@ -76,7 +76,13 @@ import com.jogamp.common.util.IntIntHashMap;
  */
 
 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 
diff --git a/src/jogl/classes/jogamp/opengl/GLContextImpl.java b/src/jogl/classes/jogamp/opengl/GLContextImpl.java
index cab629c3a..996a47590 100644
--- a/src/jogl/classes/jogamp/opengl/GLContextImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLContextImpl.java
@@ -40,8 +40,11 @@
 
 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;
 
@@ -65,6 +68,7 @@ import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
 import javax.media.opengl.GL2GL3;
+import javax.media.opengl.GL3ES3;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDebugListener;
@@ -259,6 +263,17 @@ public abstract class GLContextImpl extends GLContext {
   }
 
   @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;
   }
@@ -275,6 +290,11 @@ public abstract class GLContextImpl extends GLContext {
     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).
@@ -394,9 +414,10 @@ public abstract class GLContextImpl extends GLContext {
                       associateDrawableException = t;
                   }
                   if ( 0 != defaultVAO ) {
-                      int[] tmp = new int[] { defaultVAO };
-                      gl.getGL2GL3().glBindVertexArray(0);
-                      gl.getGL2GL3().glDeleteVertexArrays(1, tmp, 0);
+                      final int[] tmp = new int[] { defaultVAO };
+                      final GL3ES3 gl3es3 = gl.getRootGL().getGL3ES3();
+                      gl3es3.glBindVertexArray(0);
+                      gl3es3.glDeleteVertexArrays(1, tmp, 0);
                       defaultVAO = 0;
                   }
                   glDebugHandler.enable(false);
@@ -631,16 +652,12 @@ public abstract class GLContextImpl extends GLContext {
         final boolean created;
         try {
             created = createImpl(shareWith); // may throws exception if fails!
-            if( created && isGL3core() ) {
-                // Due to GL 3.1 core spec: E.1. DEPRECATED AND REMOVED FEATURES (p 296),
-                //        GL 3.2 core spec: E.2. DEPRECATED AND REMOVED FEATURES (p 331)
-                // there is no more default VAO buffer 0 bound, hence generating and binding one
-                // to avoid INVALID_OPERATION at VertexAttribPointer. 
-                // More clear is GL 4.3 core spec: 10.4 (p 307).
+            if( created && hasNoDefaultVAO() ) {
                 final int[] tmp = new int[1];
-                gl.getGL2GL3().glGenVertexArrays(1, tmp, 0);
+                final GL3ES3 gl3es3 = gl.getRootGL().getGL3ES3();
+                gl3es3.glGenVertexArrays(1, tmp, 0);
                 defaultVAO = tmp[0];
-                gl.getGL2GL3().glBindVertexArray(defaultVAO);
+                gl3es3.glBindVertexArray(defaultVAO);
             }
         } finally {
             if (null != shareWith) {
@@ -669,7 +686,7 @@ public abstract class GLContextImpl extends GLContext {
                 if( 0 == ( ctxOptions & GLContext.CTX_PROFILE_ES) ) {   // not ES profile
                     final int reqMajor;
                     final int reqProfile;
-                    if( ctxVersion.compareTo(Version30) <= 0 ) {
+                    if( ctxVersion.compareTo(Version300) <= 0 ) {
                         reqMajor = 2;
                     } else {
                         reqMajor = ctxVersion.getMajor();
@@ -834,6 +851,7 @@ public abstract class GLContextImpl extends GLContext {
         boolean hasGL2   = false;
         boolean hasGL4   = false;
         boolean hasGL3   = false;
+        boolean hasES3   = false;
         
         // Even w/ PROFILE_ALIASING, try to use true core GL profiles
         // ensuring proper user behavior across platforms due to different feature sets!
@@ -902,6 +920,13 @@ public abstract class GLContextImpl extends GLContext {
                 resetStates(); // clean this context states, since creation was temporary                
             }
         }
+        if(!hasES3) {
+            hasES3   = createContextARBMapVersionsAvailable(3, CTX_PROFILE_ES);  // ES3
+            success |= hasES3;
+            if(hasES3) {
+                resetStates(); // 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);
@@ -923,12 +948,7 @@ public abstract class GLContextImpl extends GLContext {
    **/
   private final boolean createContextARBMapVersionsAvailable(int reqMajor, int reqProfile) {
     long _context;
-    int ctp = CTX_IS_ARB_CREATED;
-    if(CTX_PROFILE_COMPAT == reqProfile) {
-        ctp |= CTX_PROFILE_COMPAT ;
-    } else {
-        ctp |= CTX_PROFILE_CORE ;
-    }
+    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,
@@ -938,10 +958,10 @@ 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,
@@ -1001,7 +1021,7 @@ public abstract class GLContextImpl extends GLContext {
     minor[0]=minorMax;
     long _context=0;
 
-    while ( GLContext.isValidGLVersion(major[0], minor[0]) &&
+    while ( GLContext.isValidGLVersion(ctxOptionFlags, major[0], minor[0]) &&
             ( major[0]>majorMin || major[0]==majorMin && minor[0] >=minorMin ) ) {
         if (DEBUG) {
             System.err.println(getThreadName() + ": createContextARBVersions: share "+share+", direct "+direct+", version "+major[0]+"."+minor[0]);
@@ -1017,7 +1037,7 @@ public abstract class GLContextImpl extends GLContext {
             }
         }
 
-        if(!GLContext.decrementGLVersion(major, minor)) {
+        if(!GLContext.decrementGLVersion(ctxOptionFlags, major, minor)) {
             break;
         }
     }
@@ -1038,11 +1058,11 @@ public abstract class GLContextImpl extends GLContext {
         throw new GLException("Invalid GL Version "+major+"."+minor+", ctp "+toHexString(ctp));
       }
       
-      if (!GLContext.isValidGLVersion(major, minor)) {
+      if (!GLContext.isValidGLVersion(ctp, major, minor)) {
         throw new GLException("Invalid GL Version "+major+"."+minor+", ctp "+toHexString(ctp));
       }
       ctxVersion = new VersionNumber(major, minor, 0);
-      ctxVersionString = getGLVersion(major, minor, ctxOptions, glVersion);
+      ctxVersionString = getGLVersion(major, minor, ctp, glVersion);
       ctxVendorVersion = glVendorVersion;
       ctxOptions = ctp;
       if(useGL) {
@@ -1085,6 +1105,27 @@ 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;
@@ -1095,24 +1136,24 @@ public abstract class GLContextImpl extends GLContext {
    * ie for GLXExt, EGLExt, ..
    */
   public abstract ProcAddressTable getPlatformExtProcAddressTable();
-
+  
   /**
-   * Pbuffer support; given that this is a GLContext associated with a
-   * pbuffer, binds this pbuffer to its texture target.
-   * @throws GLException if not implemented (default)
-   * @deprecated use FBO/GLOffscreenAutoDrawable instead of pbuffer
+   * Part of <code>GL_NV_vertex_array_range</code>.
+   * <p>
+   * Provides platform-independent access to the <code>wglAllocateMemoryNV</code> /
+   * <code>glXAllocateMemoryNV</code>.
+   * </p>
    */
-  public void bindPbufferToTexture() { throw new GLException("not implemented"); }
+  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.
-   * @throws GLException if not implemented (default)
-   * @deprecated use FBO/GLOffscreenAutoDrawable instead of pbuffer
-   */
-  public void releasePbufferFromTexture() { throw new GLException("not implemented"); }
-
-  public abstract ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3);
+   * 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 glFreeMemoryNV(ByteBuffer pointer);
 
   /** Maps the given "platform-independent" function name to a real function
       name. Currently this is only used to map "glAllocateMemoryNV" and
@@ -1144,10 +1185,15 @@ 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>() {
+        public Object run() {
+            table.reset(getDrawableImpl().getGLDynamicLookupHelper() );
+            return null;
+        }
+    } );
   }
-
+  
   private final boolean initGLRendererAndGLVersionStrings()  {
     final GLDynamicLookupHelper glDynLookupHelper = getDrawableImpl().getGLDynamicLookupHelper();
     final long _glGetString = glDynLookupHelper.dynamicLookupFunction("glGetString");
@@ -1217,7 +1263,7 @@ public abstract class GLContextImpl extends GLContext {
               int[] major = new int[] { version.getMajor() };
               int[] minor = new int[] { version.getMinor() };
               limitNonARBContextVersion(major, minor, ctp);
-              if ( GLContext.isValidGLVersion(major[0], minor[0]) ) {
+              if ( GLContext.isValidGLVersion(ctp, major[0], minor[0]) ) {
                   return new VersionNumber(major[0], minor[0], 0);
               }
           }
@@ -1253,6 +1299,11 @@ public abstract class GLContextImpl extends GLContext {
     }
   }
   
+  protected final int getCtxOptions() {
+      return ctxOptions;
+  }
+
+  
   /**
    * Sets the OpenGL implementation class and
    * the cache of which GL functions are available for calling through this
@@ -1284,7 +1335,7 @@ public abstract class GLContextImpl extends GLContext {
         return true; // already done and not forced
     }
 
-    if ( 0 < major && !GLContext.isValidGLVersion(major, minor) ) {
+    if ( 0 < major && !GLContext.isValidGLVersion(ctxProfileBits, major, minor) ) {
         throw new GLException("Invalid GL Version Request "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
     }
     
@@ -1345,7 +1396,7 @@ public abstract class GLContextImpl extends GLContext {
         }
         
         // Only validate if a valid int version was fetched, otherwise cont. w/ version-string method -> 3.0 > Version || Version > MAX!
-        if ( GLContext.isValidGLVersion(glIntMajor[0], glIntMinor[0]) ) {
+        if ( GLContext.isValidGLVersion(ctxProfileBits, glIntMajor[0], glIntMinor[0]) ) {
             if( glIntMajor[0]<major || ( glIntMajor[0]==major && glIntMinor[0]<minor ) || 0 == major ) {        
                 if( strictMatch && 2 < major ) { // relaxed match for versions major < 3 requests, last resort!
                     if(DEBUG) {
@@ -1400,8 +1451,8 @@ public abstract class GLContextImpl extends GLContext {
         System.err.println(getThreadName() + ": GLContext.setGLFuncAvail: post version verification "+GLContext.getGLVersion(major, minor, ctxProfileBits, null)+", strictMatch "+strictMatch+", versionValidated "+versionValidated+", versionGL3IntFailed "+versionGL3IntFailed);
     }
     
-    if( 2 > major ) { // there is no ES2-compat for a profile w/ major < 2
-        ctxProfileBits &= ~GLContext.CTX_IMPL_ES2_COMPAT;
+    if( 2 > major ) { // 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);
@@ -1477,13 +1528,31 @@ public abstract class GLContextImpl extends GLContext {
         }
     }
     
-    if( ( 0 != ( CTX_PROFILE_ES & ctxProfileBits ) && major >= 2 ) || isExtensionAvailable(GLExtensions.ARB_ES2_compatibility) ) {
+    if( 0 != ( CTX_PROFILE_ES & ctxProfileBits ) ) {
+        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( ( 0 != ( CTX_PROFILE_ES & ctxProfileBits ) && major == 1 ) ||  isExtensionAvailable(GLExtensions.OES_single_precision) ) {
+        ctxProfileBits |= CTX_IMPL_FP32_COMPAT_API;
+    }
+    
     if(FORCE_NO_FBO_SUPPORT) {
         ctxProfileBits &= ~CTX_IMPL_FBO ;
     }      
@@ -1493,6 +1562,8 @@ public abstract class GLContextImpl extends GLContext {
     //
     setContextVersion(major, minor, ctxProfileBits, vendorVersion, true);
     
+    finalizeInit(gl);
+    
     setDefaultSwapInterval();
     
     final int glErrX = gl.glGetError(); // clear GL error, maybe caused by above operations
@@ -1508,6 +1579,8 @@ public abstract class GLContextImpl extends GLContext {
     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 isDriverMesa = glRenderer.contains(MesaSP) || glRenderer.contains("Gallium ");
@@ -1596,7 +1669,7 @@ public abstract class GLContextImpl extends GLContext {
             //
             final int quirk = GLRendererQuirks.DontCloseX11Display;
             if( glRenderer.contains(MesaSP) ) {
-                if ( glRenderer.contains("X11") && vendorVersion.compareTo(Version80) < 0 ) {
+                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+"]");
                     }
@@ -1632,7 +1705,7 @@ public abstract class GLContextImpl extends GLContext {
             }
             quirks[i++] = quirk;
         }
-        if( hwAccel /* glRenderer.contains("Intel(R)") || glRenderer.contains("AMD ") */ )
+        if( hwAccel /* glRenderer.contains( MesaRendererIntelsp ) || glRenderer.contains( MesaRendererAMDsp ) */ )
         {
             final int quirk = GLRendererQuirks.NoDoubleBufferedPBuffer;
             if(DEBUG) {
@@ -1640,14 +1713,13 @@ public abstract class GLContextImpl extends GLContext {
             }
             quirks[i++] = quirk;
         }
-        if( glRenderer.contains("Intel(R)") && 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 (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( Platform.getOSType() == Platform.OSType.WINDOWS && glRenderer.contains("SVGA3D") )
         {
@@ -1748,7 +1820,7 @@ public abstract class GLContextImpl extends GLContext {
     // 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) {}
@@ -1758,31 +1830,28 @@ public abstract class GLContextImpl extends GLContext {
     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 = GLNameResolver.normalizeVEN(GLNameResolver.normalizeARB(glFunctionName, true), true);
-    long addr = 0;
+    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; 0==addr && i < variants; i++) {
-        String tmp = GLNameResolver.getFuncNamePermutation(tmpBase, i);
+    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;
   }
 
   @Override
-  public boolean isExtensionAvailable(String glExtensionName) {
+  public final boolean isExtensionAvailable(String glExtensionName) {
       if(null!=extensionAvailability) {
         return extensionAvailability.isExtensionAvailable(mapToRealGLExtensionName(glExtensionName));
       }
@@ -1824,7 +1893,7 @@ public abstract class GLContextImpl extends GLContext {
 
   protected static String getContextFQN(AbstractGraphicsDevice device, int major, int minor, int ctxProfileBits) {
       // remove non-key values
-      ctxProfileBits &= ~( GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ) ;
+      ctxProfileBits &= CTX_IMPL_CACHE_MASK;
 
       return device.getUniqueID() + "-" + toHexString(composeBits(major, minor, ctxProfileBits));
   }
@@ -1900,10 +1969,6 @@ public abstract class GLContextImpl extends GLContext {
     return glStateTracker;
   }
   
-  public final boolean isDefaultVAO(int vao) {
-      return defaultVAO == vao;
-  }
-
   //---------------------------------------------------------------------------
   // Helpers for context optimization where the last context is left
   // current on the OpenGL worker thread
@@ -2009,7 +2074,7 @@ public abstract class GLContextImpl extends GLContext {
   public final int getContextCreationFlags() {
       return additionalCtxCreationFlags;
   }
-
+  
   @Override
   public final void setContextCreationFlags(int flags) {
       if(!isCreated()) {
@@ -2052,7 +2117,7 @@ public abstract class GLContextImpl extends GLContext {
   @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);
       }
@@ -2061,7 +2126,7 @@ public abstract class GLContextImpl extends GLContext {
   @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);
       }
@@ -2071,15 +2136,15 @@ public abstract class GLContextImpl extends GLContext {
   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 */
-  protected static native void glGetIntegervInt(int pname, int[] params, int params_offset, long procAddress);  
+  private static native void glGetIntegervInt(int pname, int[] params, int params_offset, long procAddress);
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java b/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
index 0000e6199..9ecaca75d 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;
@@ -39,8 +41,6 @@ import com.jogamp.common.os.Platform;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.opengl.GLExtensions;
 
-import jogamp.opengl.gl4.GL4bcProcAddressTable;
-
 /**
  * The GLDebugMessageHandler, handling <i>GL_ARB_debug_output</i> or <i>GL_AMD_debug_output</i>
  * debug messages.<br>
@@ -107,6 +107,18 @@ public class GLDebugMessageHandler {
         }
     }
     
+    private final long getAddressFor(final ProcAddressTable table, final String functionName) {
+        return AccessController.doPrivileged(new PrivilegedAction<Long>() {
+            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()) {
@@ -148,17 +160,17 @@ public class GLDebugMessageHandler {
         }
                 
         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;
+                    glDebugMessageCallbackProcAddress = getAddressFor(procAddressTable, "glDebugMessageCallbackARB");
                     break;
                 case EXT_AMD: 
-                    glDebugMessageCallbackProcAddress = desktopProcAddressTable._addressof_glDebugMessageCallbackAMD;
+                    glDebugMessageCallbackProcAddress = getAddressFor(procAddressTable, "glDebugMessageCallbackAMD");
                     break;
             }
         } else {
+            glDebugMessageCallbackProcAddress = 0;
             if(DEBUG) {
                 System.err.println("Non desktop context not supported");    
             }            
@@ -212,9 +224,9 @@ public class GLDebugMessageHandler {
     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);
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
index 06e856d41..41ea06deb 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
@@ -247,7 +247,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   //
   
   @Override
-  public abstract boolean canCreateGLPbuffer(AbstractGraphicsDevice device);
+  public abstract boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp);
 
   @Override
   public GLPbuffer createGLPbuffer(AbstractGraphicsDevice deviceReq,
@@ -263,7 +263,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
     if(null == device) {
         throw new GLException("No shared device for requested: "+deviceReq);
     }
-    if ( !canCreateGLPbuffer(device) ) {
+    if ( !canCreateGLPbuffer(device, capsRequested.getGLProfile()) ) {
         throw new GLException("Pbuffer not available with device: "+device);
     }
 
@@ -575,16 +575,16 @@ 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();
   }
 
   //------------------------------------------------------
@@ -616,35 +616,6 @@ 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() {
-          @Override
-        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 177c465da..5418fbaf3 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
@@ -62,8 +62,13 @@ import javax.media.opengl.GLRunnable;
     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 final Object listenersLock = new Object();
   private final ArrayList<GLEventListener> listeners = new ArrayList<GLEventListener>();
@@ -531,10 +536,10 @@ public class GLDrawableHelper {
       }
   }
   
-  private final void init(GLEventListener l, GLAutoDrawable drawable, boolean sendReshape) {
+  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(), true /* setViewport */, false /* checkInit */);
+          reshape(l, drawable, 0, 0, drawable.getWidth(), drawable.getHeight(), setViewport, false /* checkInit */);
       }
   }
 
@@ -545,33 +550,40 @@ public class GLDrawableHelper {
   public final void init(GLAutoDrawable drawable, boolean sendReshape) {
     synchronized(listenersLock) {
         final ArrayList<GLEventListener> _listeners = listeners;
-        for (int i=0; i < _listeners.size(); 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);
+        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)) {
+    if( glRunnables.size()>0 && !execGLRunnables(drawable) ) { // glRunnables volatile OK; execGL.. only executed if size > 0
         displayImpl(drawable);  
     }
   }
   private final void displayImpl(GLAutoDrawable drawable) {
       synchronized(listenersLock) {
           final ArrayList<GLEventListener> _listeners = listeners;
-          for (int i=0; i < _listeners.size(); i++) {
+          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
             if( listenersToBeInit.remove(listener) ) {
-                init( listener, drawable, true /* sendReshape */) ;
+                init( listener, drawable, true /* sendReshape */, listenersToBeInit.size() + 1 == listenerCount /* setViewport if 1st init */ );
             }
             listener.display(drawable);
           }
@@ -585,7 +597,7 @@ public class GLDrawableHelper {
         // in case this one is added after the realization of the GLAutoDrawable
         synchronized(listenersLock) {
             if( listenersToBeInit.remove(listener) ) {
-                init( listener, drawable, false /* sendReshape */) ;
+                listener.init(drawable);
             }
         }
     }
@@ -598,29 +610,27 @@ 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((GLEventListener) listeners.get(i), drawable, x, y, width, height, 0==i /* setViewport */, true /* checkInit */);
         }
     }
   }
 
-  private final boolean execGLRunnables(GLAutoDrawable drawable) {
+  private final boolean execGLRunnables(GLAutoDrawable drawable) { // glRunnables.size()>0
     boolean res = true;
-    if(glRunnables.size()>0) { // volatile OK
-        // swap one-shot list asap
-        final ArrayList<GLRunnableTask> _glRunnables;
-        synchronized(glRunnablesLock) {
-            if(glRunnables.size()>0) {
-                _glRunnables = glRunnables;
-                glRunnables = new ArrayList<GLRunnableTask>();
-            } else {
-                _glRunnables = null;
-            }
+    // 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;
-            }
+    }
+    
+    if(null!=_glRunnables) {
+        for (int i=0; i < _glRunnables.size(); i++) {
+            res = _glRunnables.get(i).run(drawable) && res;
         }
     }
     return res;
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
index 877e7b60b..e1088da29 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
@@ -116,6 +116,7 @@ public abstract class GLDrawableImpl implements GLDrawable {
    * {@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);
 
diff --git a/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java
index 4c82fc2b3..8ba9f617b 100644
--- a/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/GLDynamicLibraryBundleInfo.java
@@ -36,16 +36,29 @@ public abstract class GLDynamicLibraryBundleInfo implements DynamicLibraryBundle
     protected GLDynamicLibraryBundleInfo() {
     }
 
-    /** default **/
-    @Override
-    public boolean shallLinkGlobal() { return false; }
-
-    /** 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>
+     */
+    public final boolean shallLinkGlobal() { return true; }
+    
+    /**
+     * {@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..1ed73f15e 100644
--- a/src/jogl/classes/jogamp/opengl/GLDynamicLookupHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDynamicLookupHelper.java
@@ -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
index 85f63b52c..3833e6852 100644
--- a/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
@@ -37,8 +37,14 @@ import com.jogamp.opengl.JoglVersion;
  * @see GLDrawableImpl#getDefaultReadFramebuffer()
  */
 public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
-    protected static final boolean DEBUG = GLDrawableImpl.DEBUG || Debug.debug("FBObject");
-    protected static final boolean DEBUG_SWAP = Debug.isPropertyDefined("jogl.debug.FBObject.Swap", true);
+    protected static final boolean DEBUG;
+    protected static final boolean DEBUG_SWAP;
+    
+    static {
+        Debug.initSingleton();
+        DEBUG = GLDrawableImpl.DEBUG || Debug.debug("FBObject");
+        DEBUG_SWAP = Debug.isPropertyDefined("jogl.debug.FBObject.Swap", true);
+    }
     
     private final GLDrawableImpl parent;
     private GLCapabilitiesImmutable origParentChosenCaps;
@@ -52,7 +58,10 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
     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; 
@@ -139,21 +148,20 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
                 }
             }
             fbos[fboIFront].resetSamplingSink(gl);
-            fboBound = false;
+
             fbos[0].formatToGLCapabilities(chosenFBOCaps);
             chosenFBOCaps.setDoubleBuffered( chosenFBOCaps.getDoubleBuffered() || samples > 0 );
-            
-            initialized = true;            
         } else {
-            initialized = false;
-            
             for(int i=0; i<fbos.length; i++) {
                 fbos[i].destroy(gl);
             }
             fbos=null;
-            fboBound = false;   
-            pendingFBOReset = -1;
         }
+        fboBound = false;
+        fboSwapped = false;
+        pendingFBOReset = -1;
+        initialized = realize;
+        
         if(DEBUG) {
             System.err.println("GLFBODrawableImpl.initialize("+realize+"): "+this);
             Thread.dumpStack();
@@ -230,6 +238,7 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
         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;
@@ -340,10 +349,12 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
             }
             fbos[fboIBack].bind(gl);
             fboBound = true;
-        } else if( fboBound ) {
+            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");
             }
@@ -353,14 +364,16 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
     @Override
     protected void swapBuffersImpl(boolean doubleBuffered) {
         final GLContext ctx = GLContext.getCurrent();
-        boolean doPostSwap = false;
+        boolean doPostSwap;
         if( null != ctx && ctx.getGLDrawable() == this && fboBound ) {
             swapFBOImpl(ctx);
             doPostSwap = true;
-            fboBound=false;
+            fboSwapped = true;
             if(DEBUG_SWAP) {
                 System.err.println("Post FBO swap(@swap): done");
             }
+        } else {
+            doPostSwap = false;
         }
         if( null != swapBufferContext ) {
             swapBufferContext.swapBuffers(doubleBuffered);
diff --git a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
index 48b509263..d54da4d28 100644
--- a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
+++ b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
@@ -200,8 +200,9 @@ public class GLGraphicsConfigurationUtil {
         if(null == device) {
             device = factory.getDefaultDevice();
         }
-        final boolean fboAvailable = GLContext.isFBOAvailable(device, capsRequested.getGLProfile());
-        final boolean pbufferAvailable = factory.canCreateGLPbuffer(device);
+        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;
diff --git a/src/jogl/classes/jogamp/opengl/GLVersionNumber.java b/src/jogl/classes/jogamp/opengl/GLVersionNumber.java
index cea3ac4ab..e4187b35b 100644
--- a/src/jogl/classes/jogamp/opengl/GLVersionNumber.java
+++ b/src/jogl/classes/jogamp/opengl/GLVersionNumber.java
@@ -110,7 +110,7 @@ public class GLVersionNumber extends VersionNumberString {
         String str;
         {
             final GLVersionNumber glv = create(versionString);
-            str = versionString.substring(glv.endOfStringMatch());
+            str = versionString.substring(glv.endOfStringMatch()).trim();
         }
         
         while ( str.length() > 0 ) {
@@ -120,7 +120,7 @@ public class GLVersionNumber extends VersionNumberString {
                 if( version.hasMajor() && version.hasMinor() ) { // Requires at least a defined major and minor version component!
                     return version;
                 }
-                str = str.substring( eosm );
+                str = str.substring( eosm ).trim();
             } else {
                 break; // no match
             }
diff --git a/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java
index cddd142e9..3d59d1d53 100644
--- a/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/DesktopES2DynamicLibraryBundleInfo.java
@@ -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");
@@ -47,16 +47,6 @@ 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; }
-    
     public final List<String> getToolGetProcAddressFuncNameList() {
         List<String> res = new ArrayList<String>();
         res.add("eglGetProcAddress");
@@ -71,7 +61,7 @@ public class DesktopES2DynamicLibraryBundleInfo extends GLDynamicLibraryBundleIn
         return true;
     }
     
-    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>();
         
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
index 2b8ca31c9..e7977e3fb 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
@@ -171,7 +171,7 @@ public class EGLContext extends GLContextImpl {
 
         try {
             // might be unavailable on EGL < 1.2
-            if(!EGL.eglBindAPI(EGL.EGL_OPENGL_ES_API)) {
+            if( !EGL.eglBindAPI(EGL.EGL_OPENGL_ES_API) ) {
                 throw new GLException("Catched: eglBindAPI to ES failed , error "+toHexString(EGL.eglGetError()));
             }
         } catch (GLException glex) {
@@ -188,18 +188,21 @@ public class EGLContext extends GLContextImpl {
         }
 
         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;
+                contextVersionAttr = 2;
+            } 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);
             }
+            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);
@@ -219,8 +222,7 @@ public class EGLContext extends GLContextImpl {
             throw new GLException("Error making context " +
                                   toHexString(contextHandle) + " current: error code " + toHexString(EGL.eglGetError()));
         }
-        setGLFunctionAvailability(true, glProfile.usesNativeGLES2() ? 2 : 1, 0, CTX_PROFILE_ES, false);
-        return true;
+        return setGLFunctionAvailability(true, contextVersionReq, 0, CTX_PROFILE_ES, contextVersionReq>=3); // strict match for es >= 3
     }
 
     @Override
@@ -259,8 +261,7 @@ public class EGLContext extends GLContextImpl {
     protected final StringBuilder getPlatformExtensionsStringImpl() {
         StringBuilder sb = new StringBuilder();
         if (!eglQueryStringInitialized) {
-          eglQueryStringAvailable =
-            getDrawableImpl().getGLDynamicLookupHelper().dynamicLookupFunction("eglQueryString") != 0;
+          eglQueryStringAvailable = getDrawableImpl().getGLDynamicLookupHelper().isFunctionAvailable("eglQueryString");
           eglQueryStringInitialized = true;
         }
         if (eglQueryStringAvailable) {
@@ -293,16 +294,25 @@ public class EGLContext extends GLContextImpl {
         final GLProfile glp = caps.getGLProfile();
         final int[] reqMajorCTP = new int[2];
         GLContext.getRequestMajorAndCompat(glp, reqMajorCTP);
-        if(glp.isGLES() && reqMajorCTP[0] >= 2) {
-            reqMajorCTP[1] |= GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ;
+        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()) {
+        if( !caps.getHardwareAccelerated() ) {
             reqMajorCTP[1] |= GLContext.CTX_IMPL_ACCEL_SOFT;
         }
         mapStaticGLVersion(device, reqMajorCTP[0], 0, reqMajorCTP[1]);
     }    
-    /* pp */ static void mapStaticGLESVersion(AbstractGraphicsDevice device, int major) {
-        int ctp = ( 2 == major ) ? ( GLContext.CTX_PROFILE_ES | GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ) : ( GLContext.CTX_PROFILE_ES );  
+    /* pp */ static void mapStaticGLESVersion(AbstractGraphicsDevice device, final int major) {
+        int ctp = GLContext.CTX_PROFILE_ES;
+        if( major >= 3 ) {
+            ctp |= GLContext.CTX_IMPL_ES3_COMPAT | GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ;
+        } else if( major >= 2 ) {
+            ctp |= GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ;
+        }
         mapStaticGLVersion(device, major, 0, ctp);
     }
     /* pp */ static void mapStaticGLVersion(AbstractGraphicsDevice device, int major, int minor, int ctp) {
@@ -344,9 +354,13 @@ public class EGLContext extends GLContextImpl {
         throw new GLException("Not yet implemented");
     }
 
-
     @Override
-    public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
+    public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {
+        throw new GLException("Should not call this");
+    }
+    
+    @Override
+    public final void glFreeMemoryNV(ByteBuffer pointer) {
         throw new GLException("Should not call this");
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
index adb78b3b9..5d99e3eba 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
@@ -84,26 +84,30 @@ 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 = Debug.isPropertyDefined("jogl.debug.EGLDrawableFactory.QueryNativeTK", true);
+    /* 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 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 0 != dl.dynamicLookupFunction("glLoadIdentity") &&
-               0 != dl.dynamicLookupFunction("glEnableClientState") &&
-               0 != dl.dynamicLookupFunction("glColorPointer");
+        return dl.isFunctionAvailable("glLoadIdentity") &&
+               dl.isFunctionAvailable("glEnableClientState") &&
+               dl.isFunctionAvailable("glColorPointer");
     }
     
     public EGLDrawableFactory() {
@@ -253,8 +257,8 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                 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 [avail "+sr.wasES2ContextCreated+", pbuffer "+sr.hasPBufferES2+", quirks "+sr.rendererQuirksES2+", ctp "+EGLContext.getGLVersion(2, 0, sr.ctpES2, null)+"]");
+                                   "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)+"]]");
             }
             ;
         }
@@ -271,38 +275,45 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
       private final EGLGraphicsDevice device;
       // private final EGLContext contextES1;
       // private final EGLContext contextES2;
-      private final GLRendererQuirks rendererQuirksES1;
-      private final GLRendererQuirks rendererQuirksES2;
-      private final int ctpES1;
-      private final int ctpES2;
+      // 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 hasPBufferES2;
+      private final boolean hasPBufferES3ES2;
 
       SharedResource(EGLGraphicsDevice dev, 
                      boolean wasContextES1Created, boolean hasPBufferES1, GLRendererQuirks rendererQuirksES1, int ctpES1,  
-                     boolean wasContextES2Created, boolean hasPBufferES2, GLRendererQuirks rendererQuirksES2, int ctpES2) {
+                     boolean wasContextES2Created, boolean wasContextES3Created, 
+                     boolean hasPBufferES3ES2, GLRendererQuirks rendererQuirksES3ES2, int ctpES3ES2) {
           this.device = dev;
           // this.contextES1 = ctxES1;
-          // this.contextES2 = ctxES2;
+          this.wasES1ContextCreated = wasContextES1Created;
+          this.hasPBufferES1= hasPBufferES1;
           this.rendererQuirksES1 = rendererQuirksES1;
-          this.rendererQuirksES2 = rendererQuirksES2;
           this.ctpES1 = ctpES1;
-          this.ctpES2 = ctpES2;
-          this.wasES1ContextCreated = wasContextES1Created;
+          
+          // this.contextES2 = ctxES2;
+          // this.contextES3 = ctxES3;
           this.wasES2ContextCreated = wasContextES2Created;
-          this.hasPBufferES1= hasPBufferES1;
-          this.hasPBufferES2= hasPBufferES2;
+          this.wasES3ContextCreated = wasContextES3Created;
+          this.hasPBufferES3ES2= hasPBufferES3ES2;
+          this.rendererQuirksES3ES2 = rendererQuirksES3ES2;
+          this.ctpES3ES2 = ctpES3ES2;
       }
       @Override
       public final boolean isValid() {
-          return wasES1ContextCreated || wasES2ContextCreated;
+          return wasES1ContextCreated || wasES2ContextCreated || wasES3ContextCreated;
       }
       @Override
       public final EGLGraphicsDevice getDevice() { return device; }
       // final EGLContext getContextES1() { return contextES1; }
       // final EGLContext getContextES2() { return contextES2; }
+      // final EGLContext getContextES3() { return contextES3; }
       
       @Override
       public AbstractGraphicsScreen getScreen() {
@@ -318,7 +329,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
       }
       @Override
       public GLRendererQuirks getRendererQuirks() {
-          return null != rendererQuirksES2 ? rendererQuirksES2 : rendererQuirksES1 ;      
+          return null != rendererQuirksES3ES2 ? rendererQuirksES3ES2 : rendererQuirksES1 ;      
       }
     }
 
@@ -353,18 +364,30 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                                             boolean[] hasPBuffer, GLRendererQuirks[] rendererQuirks, int[] ctp) {
         final String profileString;
         switch( esProfile ) {
+            case 3:
+                profileString = GLProfile.GLES3; break; 
+            case 2:
+                profileString = GLProfile.GLES2; break; 
             case 1: 
                 profileString = GLProfile.GLES1; break;
-            case 2: 
             default: 
-                profileString = GLProfile.GLES2; break; 
+                throw new GLException("Invalid ES profile number "+esProfile);
         }
         if ( !GLProfile.isAvailable(adevice, profileString) ) {
+            if( DEBUG ) {
+                System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: "+profileString+" n/a on "+adevice);
+            }
             return false;
         }
         final GLProfile glp = GLProfile.get(adevice, profileString) ;
         final GLDrawableFactoryImpl desktopFactory = (GLDrawableFactoryImpl) GLDrawableFactory.getDesktopFactory();
         final boolean mapsADeviceToDefaultDevice = !QUERY_EGL_ES_NATIVE_TK || 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;
@@ -387,16 +410,29 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                 if( adevice != defaultDevice ) {
                     if(null == defaultSharedResource) {
                         return false;
-                    }
+                    }                    
                     switch(esProfile) {
+                        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;
-                        case 2: 
-                            rendererQuirks[0] = defaultSharedResource.rendererQuirksES2;
-                            ctp[0] = defaultSharedResource.ctpES2;
-                            break;
                     }
                     EGLContext.mapStaticGLVersion(adevice, esProfile, 0, ctp[0]);
                     return true;
@@ -421,7 +457,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                         success = true;
                     }
                     if(DEBUG) {
-                        System.err.println("EGLDrawableFactory.isEGLContextAvailable() no pbuffer config available, detected !pbuffer config: "+success);
+                        System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig() no pbuffer config available, detected !pbuffer config: "+success);
                         EGLGraphicsConfigurationFactory.printCaps("!PBufferCaps", capsAnyL, System.err);
                     }                    
                 }                
@@ -457,13 +493,13 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                             } else {
                                 // Oops .. something is wrong
                                 if(DEBUG) {
-                                    System.err.println("EGLDrawableFactory.isEGLContextAvailable: "+eglDevice+", "+context.getGLVersion()+" - VERSION is null, dropping availability!");                                
+                                    System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: "+eglDevice+", "+context.getGLVersion()+" - VERSION is null, dropping availability!");                                
                                 }
                             }
                         }
                     } catch (GLException gle) {
                         if (DEBUG) {
-                            System.err.println("EGLDrawableFactory.createShared: INFO: context create/makeCurrent failed");
+                            System.err.println("EGLDrawableFactory.mapAvailableEGLESConfig: INFO: context create/makeCurrent failed");
                             gle.printStackTrace();
                         }
                     } finally {
@@ -557,14 +593,15 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
     private SharedResource createEGLSharedResourceImpl(AbstractGraphicsDevice adevice) {
         final boolean madeCurrentES1;            
         final boolean madeCurrentES2;
+        final boolean madeCurrentES3;
         boolean[] hasPBufferES1 = new boolean[] { false };
-        boolean[] hasPBufferES2 = new boolean[] { false };
+        boolean[] hasPBufferES3ES2 = new boolean[] { false };
         // EGLContext[] eglCtxES1 = new EGLContext[] { null };
         // EGLContext[] eglCtxES2 = new EGLContext[] { null };
         GLRendererQuirks[] rendererQuirksES1 = new GLRendererQuirks[] { null };
-        GLRendererQuirks[] rendererQuirksES2 = new GLRendererQuirks[] { null };
+        GLRendererQuirks[] rendererQuirksES3ES2 = new GLRendererQuirks[] { null };
         int[] ctpES1 = new int[] { -1 };
-        int[] ctpES2 = new int[] { -1 };
+        int[] ctpES3ES2 = new int[] { -1 };
         
         
         if (DEBUG) {
@@ -577,9 +614,16 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
             madeCurrentES1 = false;
         }
         if( null != eglES2DynamicLookupHelper ) {
-            madeCurrentES2 = mapAvailableEGLESConfig(adevice, 2, hasPBufferES2, rendererQuirksES2, ctpES2);
+            madeCurrentES3 = mapAvailableEGLESConfig(adevice, 3, hasPBufferES3ES2, rendererQuirksES3ES2, ctpES3ES2);
+            if( madeCurrentES3 ) {
+                madeCurrentES2 = true;
+                EGLContext.mapStaticGLVersion(adevice, 2, 0, ctpES3ES2[0]);
+            } else {
+                madeCurrentES2 = mapAvailableEGLESConfig(adevice, 2, hasPBufferES3ES2, rendererQuirksES3ES2, ctpES3ES2);
+            }
         } else {
             madeCurrentES2 = false;
+            madeCurrentES3 = false;
         }
         
         if( !EGLContext.getAvailableGLVersionsSet(adevice) ) {
@@ -589,10 +633,10 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
         }
         if( hasX11 ) {
             handleDontCloseX11DisplayQuirk(rendererQuirksES1[0]);
-            handleDontCloseX11DisplayQuirk(rendererQuirksES2[0]);
+            handleDontCloseX11DisplayQuirk(rendererQuirksES3ES2[0]);
         }
         final SharedResource sr = new SharedResource(defaultDevice, madeCurrentES1, hasPBufferES1[0], rendererQuirksES1[0], ctpES1[0],
-                                                                    madeCurrentES2, hasPBufferES2[0], rendererQuirksES2[0], ctpES2[0]);
+                                                                    madeCurrentES2, madeCurrentES3, hasPBufferES3ES2[0], rendererQuirksES3ES2[0], ctpES3ES2[0]);
         
         synchronized(sharedMap) {
             sharedMap.put(adevice.getUniqueID(), sr);
@@ -600,7 +644,8 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
         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]);
-            System.err.println("EGLDrawableFactory.createShared: context ES2: " + madeCurrentES2 + ", hasPBuffer "+hasPBufferES2[0]);
+            System.err.println("EGLDrawableFactory.createShared: context ES2: " + madeCurrentES2 + ", hasPBuffer "+hasPBufferES3ES2[0]);
+            System.err.println("EGLDrawableFactory.createShared: context ES3: " + madeCurrentES3 + ", hasPBuffer "+hasPBufferES3ES2[0]);
             dumpMap();
         }
         return sr;
@@ -663,7 +708,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
     }
 
     @Override
-    public boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
+    public boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
         // SharedResource sr = getOrCreateEGLSharedResource(device);
         // return sr.hasES1PBuffer() || sr.hasES2PBuffer();
         return true;
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java
index fe9d7573d..778f0cb38 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDynamicLibraryBundleInfo.java
@@ -29,6 +29,7 @@
 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");
@@ -52,19 +53,12 @@ public abstract class EGLDynamicLibraryBundleInfo extends GLDynamicLibraryBundle
     }
 
     /** 
-     * 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.
      */
     @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;
         }
@@ -94,7 +88,7 @@ public abstract class EGLDynamicLibraryBundleInfo extends GLDynamicLibraryBundle
         }
     }
     
-    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 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java
index 0a373eb7f..dd3d6faea 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLES1DynamicLibraryBundleInfo.java
@@ -30,12 +30,12 @@ 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() {
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         {
             final List<String> libsGL = new ArrayList<String>();
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java
index d4ee852b1..0d20fd4e8 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLES2DynamicLibraryBundleInfo.java
@@ -30,28 +30,48 @@ 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() {
+    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
+            // 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");
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java b/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java
index f857c6b5c..b61624d79 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLGLCapabilities.java
@@ -101,12 +101,16 @@ public class EGLGLCapabilities extends GLCapabilities {
     if(null == glp) {
         return true;
     }
-    if(0 != (renderableType & EGL.EGL_OPENGL_ES_BIT) && glp.usesNativeGLES1()) {
+    /** FIXME: EGLExt.EGL_OPENGL_ES3_BIT_KHR OK ? */
+    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;
     }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
index b90609ff1..6787ef500 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
@@ -52,7 +52,7 @@ import javax.media.nativewindow.OffscreenLayerSurface;
 import javax.media.nativewindow.ProxySurface;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2ES2;
-import javax.media.opengl.GL3;
+import javax.media.opengl.GL3ES3;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
@@ -74,14 +74,13 @@ 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.GLExtensions;
 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 class MacOSXCGLContext extends GLContextImpl
-{
+{  
   // Abstract interface for implementation of this context (either
   // NSOpenGL-based or CGL-based)
   protected interface GLBackendImpl {
@@ -142,7 +141,7 @@ public class MacOSXCGLContext extends GLContextImpl
 
   private static final String shaderBasename = "texture01_xxx";
   
-  private static ShaderProgram createCALayerShader(GL3 gl) {
+  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, 
@@ -420,12 +419,18 @@ public class MacOSXCGLContext extends GLContextImpl
   }
 
   @Override
-  public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
+  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();
@@ -459,15 +464,6 @@ public class MacOSXCGLContext extends GLContextImpl
     return new StringBuilder();
   }
 
-  @Override
-  public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals(GLExtensions.ARB_pbuffer) ||
-        glExtensionName.equals(GLExtensions.ARB_pixel_format)) {
-      return true;
-    }
-    return super.isExtensionAvailable(glExtensionName);
-  }
-
   // Support for "mode switching" as described in MacOSXCGLDrawable
   public void setOpenGLMode(GLBackendType mode) {
       if (mode == openGLMode) {
@@ -846,7 +842,7 @@ public class MacOSXCGLContext extends GLContextImpl
                   }
                   if( MacOSXCGLContext.this.isGL3core() ) {
                       if( null == gl3ShaderProgram) {
-                          gl3ShaderProgram = createCALayerShader(MacOSXCGLContext.this.gl.getGL3());
+                          gl3ShaderProgram = createCALayerShader(MacOSXCGLContext.this.gl.getGL3ES3());
                       }
                       gl3ShaderProgramName = gl3ShaderProgram.program();
                   } else {
@@ -939,7 +935,7 @@ public class MacOSXCGLContext extends GLContextImpl
           if(0 == cglCtx) {
               throw new InternalError("Null CGLContext for: "+this);
           }
-          int err = CGL.CGLLockContext(cglCtx);
+          final int err = CGL.CGLLockContext(cglCtx);
           if(CGL.kCGLNoError == err) {
               validatePBufferConfig(ctx); // required to handle pbuffer change ASAP
               return CGL.makeCurrentContext(ctx);
@@ -1000,6 +996,8 @@ public class MacOSXCGLContext extends GLContextImpl
               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"); }
           }
@@ -1008,6 +1006,14 @@ public class MacOSXCGLContext extends GLContextImpl
       }
       
       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() {
@@ -1036,6 +1042,45 @@ public class MacOSXCGLContext extends GLContextImpl
                           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).
@@ -1050,6 +1095,7 @@ public class MacOSXCGLContext extends GLContextImpl
                                   // 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;
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
index 910158d1f..4bd7bc994 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
@@ -117,8 +117,7 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
             createdContexts.add(new WeakReference<MacOSXCGLContext>(osxCtx));
         } else {
             for(int i=0; i<createdContexts.size(); ) {
-                final WeakReference<MacOSXCGLContext> ref = createdContexts.get(i); 
-                final MacOSXCGLContext _ctx = ref.get();
+                final MacOSXCGLContext _ctx = createdContexts.get(i).get();
                 if( _ctx == null || _ctx == ctx) {
                     createdContexts.remove(i);
                 } else {
@@ -134,8 +133,7 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
     if(doubleBuffered) { 
         synchronized (createdContexts) {
             for(int i=0; i<createdContexts.size(); ) {
-                final WeakReference<MacOSXCGLContext> ref = createdContexts.get(i); 
-                final MacOSXCGLContext ctx = ref.get();
+                final MacOSXCGLContext ctx = createdContexts.get(i).get();
                 if (ctx != null) {
                     ctx.swapBuffers();
                     i++;
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
index c9402b33d..83d656475 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
@@ -332,8 +332,13 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   @Override
-  public boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
-    return true;
+  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
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
index 03ec94db6..f8c874a53 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
@@ -31,13 +31,13 @@ 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");
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..69223d0b9
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/openal/av/ALDummyUsage.java
@@ -0,0 +1,19 @@
+package jogamp.opengl.openal.av;
+
+import jogamp.opengl.util.av.impl.FFMPEGMediaPlayer;
+
+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;
+    static FFMPEGMediaPlayer.PixelFormat pfmt;
+    
+    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/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java
index 32c863553..2d40fe4ec 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGDynamicLibraryBundleInfo.java
@@ -28,6 +28,8 @@
  
 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;
@@ -53,10 +55,10 @@ import com.jogamp.common.util.RunnableExecutor;
  *          Tue Feb 28 12:07:53 2012 322537478b63c6bc01e640643550ff539864d790 minor  1 ->  2
  */
 class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
-    private static List<String> glueLibNames = new ArrayList<String>(); // none
+    private static final List<String> glueLibNames = new ArrayList<String>(); // none
     
     private static final int symbolCount = 31;
-    private static String[] symbolNames = {
+    private static final String[] symbolNames = {
          "avcodec_version",
          "avformat_version",
 /* 3 */  "avutil_version",
@@ -97,7 +99,7 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
     };
     
     // alternate symbol names
-    private static String[][] altSymbolNames = {
+    private static final 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
@@ -105,7 +107,7 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
     };
     
     // optional symbol names
-    private static String[] optionalSymbolNames = {
+    private static final String[] optionalSymbolNames = {
          "avformat_free_context",     // 52.96.0   (opt)
          "avformat_network_init",     // 53.13.0   (opt)
          "avformat_network_deinit",   // 53.13.0   (opt)
@@ -131,8 +133,11 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
     
     static boolean initSingleton() { return ready; }
     
-    private static boolean initSymbols() {
-        final DynamicLibraryBundle dl = new DynamicLibraryBundle(new FFMPEGDynamicLibraryBundleInfo());
+    private static final boolean initSymbols() {
+        final DynamicLibraryBundle dl = AccessController.doPrivileged(new PrivilegedAction<DynamicLibraryBundle>() {
+                                          public DynamicLibraryBundle run() {
+                                              return new DynamicLibraryBundle(new FFMPEGDynamicLibraryBundleInfo());
+                                          } } );
         final boolean avutilLoaded = dl.isToolLibLoaded(0); 
         final boolean avformatLoaded = dl.isToolLibLoaded(1);
         final boolean avcodecLoaded = dl.isToolLibLoaded(2);
@@ -166,9 +171,13 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
         }
         
         // lookup
-        for(int i = 0; i<symbolCount; i++) {
-            symbolAddr[i] = dl.dynamicLookupFunction(symbolNames[i]);
-        }        
+        AccessController.doPrivileged(new PrivilegedAction<Object>() {
+            public Object run() {
+                for(int i = 0; i<symbolCount; i++) {
+                    symbolAddr[i] = dl.dynamicLookupFunction(symbolNames[i]);
+                }
+                return null;
+            } } );
         
         // validate results
         for(int i = 0; i<symbolCount; i++) {
@@ -206,10 +215,18 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
     }
 
     @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() {
@@ -217,7 +234,7 @@ class FFMPEGDynamicLibraryBundleInfo implements DynamicLibraryBundleInfo  {
     }
 
     @Override
-    public List<List<String>> getToolLibNames() {
+    public final List<List<String>> getToolLibNames() {
         List<List<String>> libsList = new ArrayList<List<String>>();
 
         final List<String> avutil = new ArrayList<String>();
@@ -274,12 +291,12 @@ 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();
     }    
     
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 4be2bcb58..f416bb1f8 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/impl/FFMPEGMediaPlayer.java
@@ -31,6 +31,8 @@ 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;
@@ -43,9 +45,6 @@ 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;
 
 /***
@@ -194,25 +193,43 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
         System.out.println("setURL: p2 "+this);
         int tf, tif=GL.GL_RGBA; // texture format and internal format
         switch(vBytesPerPixelPerPlane) {
-            case 1: tf = GL2ES2.GL_ALPHA; tif=GL.GL_ALPHA; break;
-            case 3: tf = GL2ES2.GL_RGB;   tif=GL.GL_RGB;   break;
-            case 4: tf = GL2ES2.GL_RGBA;  tif=GL.GL_RGBA;  break;
+            case 1:
+                if( gl.isGL3ES3() ) {
+                    tf = GL2ES2.GL_RED;   tif=GL2ES2.GL_RED;   // RED is supported on ES3 and >= GL3 [core]; ALPHA is deprecated on core!
+                } else {
+                    tf = GL2ES2.GL_ALPHA; tif=GL2ES2.GL_ALPHA; // ALPHA is supported on ES2 and GL2
+                }
+                break;
+            case 3: tf = GL2ES2.GL_RGB;   tif=GL.GL_RGB;     break;
+            case 4: tf = GL2ES2.GL_RGBA;  tif=GL.GL_RGBA;    break;
             default: throw new RuntimeException("Unsupported bytes-per-pixel / plane "+vBytesPerPixelPerPlane);
         }        
         setTextureFormat(tif, 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;
-        } else {
-            throw new InternalError("Unknown ProcAddressTable: "+pt.getClass().getName()+" of "+ctx.getClass().getName());
+        final GLContextImpl ctx = (GLContextImpl)gl.getContext();
+        final ProcAddressTable pt = ctx.getGLProcAddressTable();
+        procAddrGLTexSubImage2D = getAddressFor(pt, "glTexSubImage2D");
+        if( 0 == procAddrGLTexSubImage2D ) {
+            throw new InternalError("glTexSubImage2D n/a in ProcAddressTable: "+pt.getClass().getName()+" of "+ctx.getGLVersion());
         }
     }
+    
+    /**
+     * Catches IllegalArgumentException and returns 0 if functionName is n/a,
+     * otherwise the ProcAddressTable's field value. 
+     */
+    private final long getAddressFor(final ProcAddressTable table, final String functionName) {
+        return AccessController.doPrivileged(new PrivilegedAction<Long>() {
+            public Long run() {
+                try {
+                    return Long.valueOf( table.getAddressFor(functionName) );
+                } catch (IllegalArgumentException iae) { 
+                    return Long.valueOf(0);
+                }
+            }
+        } ).longValue();
+    }
+    
     private void updateAttributes2(int pixFmt, int planes, int bitsPerPixel, int bytesPerPixelPerPlane,
                                    int lSz0, int lSz1, int lSz2,
                                    int tWd0, int tWd1, int tWd2) {
@@ -296,9 +313,9 @@ public class FFMPEGMediaPlayer extends EGLMediaPlayerImpl {
               "  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).a;\n"+
-              "  u = texture2D(image, u_off+tc_half).a;\n"+
-              "  v = texture2D(image, v_off+tc_half).a;\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 = 1.1643*(y-0.0625);\n"+
               "  u = u-0.5;\n"+
               "  v = v-0.5;\n"+
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 f4f20ac7c..2e924cbfb 100644
--- a/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncPipeline.java
+++ b/src/jogl/classes/jogamp/opengl/util/glsl/fixedfunc/FixedFuncPipeline.java
@@ -66,7 +66,13 @@ import com.jogamp.opengl.util.glsl.fixedfunc.ShaderSelectionMode;
  * </p>
  */
 public class FixedFuncPipeline {
-    protected static final boolean DEBUG = Debug.isPropertyDefined("jogl.debug.FixedFuncPipeline", true);
+    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;
diff --git a/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java b/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java
index 251291a14..833771dd1 100644
--- a/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java
+++ b/src/jogl/classes/jogamp/opengl/util/jpeg/JPEGDecoder.java
@@ -301,13 +301,15 @@ public class JPEGDecoder {
         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) {
+        Frame(boolean progressive, int precision, int scanLines, int samplesPerLine, int componentsCount, int[][] qtt) {
             this.progressive = progressive;
             this.precision = precision;
             this.scanLines = scanLines;
@@ -315,6 +317,7 @@ public class JPEGDecoder {
             compIDs = new ArrayHashSet<Integer>(componentsCount);
             comps = new ComponentIn[componentsCount];
             this.compCount = componentsCount;
+            this.qtt = qtt;
         }
 
         private final void checkBounds(int idx) {
@@ -322,6 +325,17 @@ public class JPEGDecoder {
                 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; }
@@ -357,7 +371,8 @@ public class JPEGDecoder {
     /** The JPEG encoded components */
     class ComponentIn {
         final int h, v;
-        final int[] quantizationTable;
+        /** index to frame.qtt[] */
+        final int qttIdx;
         int blocksPerColumn;
         int blocksPerColumnForMcu;
         int blocksPerLine;
@@ -368,10 +383,10 @@ public class JPEGDecoder {
         BinObj huffmanTableAC;
         BinObj huffmanTableDC;
 
-        ComponentIn(int h, int v, int[] quantizationTable) {
+        ComponentIn(int h, int v, int qttIdx) {
             this.h = h;
             this.v = v;
-            this.quantizationTable = quantizationTable;
+            this.qttIdx = qttIdx;
         }
 
         public final void allocateBlocks(int blocksPerColumn, int blocksPerColumnForMcu, int blocksPerLine, int blocksPerLineForMcu) {
@@ -389,7 +404,7 @@ public class JPEGDecoder {
         }
         
         public final String toString() {
-            return "CompIn[h "+h+", v "+v+", blocks["+blocksPerColumn+", mcu "+blocksPerColumnForMcu+"]["+blocksPerLine+", mcu "+blocksPerLineForMcu+"][64]]";
+            return "CompIn[h "+h+", v "+v+", qttIdx "+qttIdx+", blocks["+blocksPerColumn+", mcu "+blocksPerColumnForMcu+"]["+blocksPerLine+", mcu "+blocksPerLineForMcu+"][64]]";
         }
     }
 
@@ -526,12 +541,14 @@ public class JPEGDecoder {
     }
     public synchronized JPEGDecoder parse(final InputStream inputStream) throws IOException {        
         clear(inputStream);
-        Frame frame = null;
-        int resetInterval = 0;
-        int[][] quantizationTables = new int[0x0F][]; // 4 bits
-        ArrayList<Frame> frames = new ArrayList<Frame>();
+        
+        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));
@@ -579,6 +596,7 @@ public class JPEGDecoder {
                 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++) {
@@ -591,12 +609,15 @@ public class JPEGDecoder {
                             tableData[z] = readUint16(); count+=2;
                         }
                     } else {
-                        throw new CodecException("DQT: invalid table precision "+precisionID+", quantizationTableSpec "+quantizationTableSpec);
+                        throw new CodecException("DQT: invalid table precision "+precisionID+", quantizationTableSpec "+quantizationTableSpec+", idx "+tableIdx);
                     }
-                    quantizationTables[quantizationTableSpec & 0x0F] = tableData;
+                    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]");
+                    throw new CodecException("ERROR: QTT format error [count!=Length]: "+count+"/"+quantizationTablesLength);
                 }
                 fileMarker = 0; // consumed and get-next
             }
@@ -604,6 +625,9 @@ public class JPEGDecoder {
 
             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;
@@ -613,7 +637,7 @@ public class JPEGDecoder {
                     final int scanLines = readUint16(); count+=2;
                     final int samplesPerLine = readUint16(); count+=2;
                     componentsCount = readUint8(); count++;
-                    frame = new Frame(progressive, precision, scanLines, samplesPerLine, componentsCount);
+                    frame = new Frame(progressive, precision, scanLines, samplesPerLine, componentsCount, quantizationTables);
                     width = frame.samplesPerLine;
                     height = frame.scanLines;
                 }
@@ -622,14 +646,15 @@ public class JPEGDecoder {
                     final int temp = readUint8(); count++;
                     final int h = temp >> 4;
                     final int v = temp & 0x0F;
-                    final int qId = readUint8(); count++;
-                    frame.putOrdered(componentId, new ComponentIn(h, v, quantizationTables[qId]));
+                    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);
+                // 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
             }
@@ -711,14 +736,21 @@ public class JPEGDecoder {
             }
         }
         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");
+            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 );
@@ -834,12 +866,14 @@ public class JPEGDecoder {
             final byte[] r = new byte[64];
 
             for (int blockRow = 0; blockRow < blocksPerColumn; blockRow++) {
-                int scanLine = blockRow << 3;
+                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++) {
-                    quantizeAndInverse(component.getBlock(blockRow, blockCol), r, R, component.quantizationTable);
+                    // 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;
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java b/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java
index e88a95a33..0fffc85b1 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/FilterType.java
@@ -1,5 +1,7 @@
 package jogamp.opengl.util.pngj;

 

+import java.util.HashMap;

+

 /**

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

  * 

@@ -26,15 +28,18 @@ 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),

 	/**

-	 * Aggressive strategy: select one of the above filters trying each of the filters (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!)

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

+	 * the filters (for every row!)

 	 */

 	FILTER_VERYAGGRESSIVE(-3),

 	/**

@@ -52,12 +57,17 @@ public enum FilterType {
 		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 FilterType getByVal(int i) {

+		return byVal.get(i);

 	}

 

 }

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageInfo.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageInfo.java
index 26562ef3e..e62134cd5 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

  */

@@ -23,14 +24,15 @@ public class ImageInfo {
 	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: 3 for RGB, 4 for RGBA, 2 for GA (gray with alpha), 1 for grayscale 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 +78,12 @@ public class ImageInfo {
 	public final int samplesPerRow;

 

 	/**

-	 * 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)

+	 * 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

+	 * 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.

 	 */

@@ -99,7 +104,8 @@ public class ImageInfo {
 	 * @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

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java
index 9f8a13230..e34e6a226 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLine.java
@@ -5,7 +5,8 @@ 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.

  */

@@ -18,21 +19,25 @@ 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 <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

+	 * 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 , and if samplesUnpacked=false, each value is a PACKED byte!

+	 * 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.palIdx2RGB()</code> (you 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;

 	/**

-	 * Same as {@link #scanline}, but with one byte per sample. Only one of scanline and scanlineb is valid - this

-	 * depends on {@link #sampleType}

+	 * 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;

 

@@ -53,10 +58,11 @@ public class ImageLine {
 	public final SampleType sampleType;

 

 	/**

-	 * true: each element of the scanline array represents a sample always, even for internally packed PNG formats

+	 * 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

+	 * 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;

 

@@ -70,11 +76,14 @@ public class ImageLine {
 	/**

 	 * 

 	 * @param imgInfo

-	 *            Inmutable ImageInfo, basic parameter of the image we are reading or writing

+	 *            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

+	 *            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

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

+	 *            images

 	 * 

 	 */

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

@@ -226,7 +235,10 @@ public class ImageLine {
 		}

 	}

 

-	/** size original: samplesPerRow sizeFinal: samplesPerRowPacked (trailing elements are trash!) **/

+	/**

+	 * 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)

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java
index 98f235662..91516a704 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLineHelper.java
@@ -5,11 +5,14 @@ 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.

+ * 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.

+ * 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

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

+ * integer base imageLines

  */

 public class ImageLineHelper {

 

@@ -18,7 +21,8 @@ public class ImageLineHelper {
 	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

+	 * 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

@@ -26,7 +30,8 @@ public class ImageLineHelper {
 	 *            Palette chunk

 	 * @param buf

 	 *            Preallocated array, optional

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

+	 * @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;

@@ -53,9 +58,12 @@ public class ImageLineHelper {
 		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

+	 * 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],

@@ -71,8 +79,8 @@ public class ImageLineHelper {
 	}

 

 	/**

-	 * 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)

+	 * 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

@@ -237,9 +245,11 @@ public class ImageLineHelper {
 	/**

 	 * 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

+	 * 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.

+	 * If

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

 	 * <p>

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

 	 * 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java
index 1e0ab746a..feb50e7b6 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ImageLines.java
@@ -3,10 +3,12 @@ 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.
+ * 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)}
+ * 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 {
 
@@ -23,7 +25,8 @@ public class ImageLines {
 	public final byte[][] scanlinesb;
 
 	/**
-	 * Allocates a matrix to store {@code nRows} image rows. See {@link ImageLine} and {@link PngReader#readRowsInt()}
+	 * Allocates a matrix to store {@code nRows} image rows. See
+	 * {@link ImageLine} and {@link PngReader#readRowsInt()}
 	 * {@link PngReader#readRowsByte()}
 	 * 
 	 * @param imgInfo
@@ -54,8 +57,9 @@ public class ImageLines {
 	}
 
 	/**
-	 * 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
+	 * 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;
@@ -86,9 +90,11 @@ public class ImageLines {
 	 * 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
+	 *            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)
diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngHelperInternal.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngHelperInternal.java
index 63edf8d17..a950c6b33 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngHelperInternal.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngHelperInternal.java
@@ -144,18 +144,23 @@ public class PngHelperInternal {
 		}

 	}

 

-	public static void skipBytes(InputStream is, int len) {

-		byte[] buf = new byte[8192 * 4];

-		int read, remain = len;

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

 		try {

-			while (remain > 0) {

-				read = is.read(buf, 0, remain > buf.length ? buf.length : remain);

-				if (read < 0)

-					throw new PngjInputException("error reading (skipping) : EOF");

-				remain -= read;

+			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("error reading (skipping)", e);

+			throw new PngjInputException(e);

 		}

 	}

 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java
index 6cc39b0e6..cdad09809 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngIDatChunkInputStream.java
@@ -37,7 +37,8 @@ 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, long offset) {

 		this.offset = offset;

@@ -95,7 +96,8 @@ 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) {

@@ -108,7 +110,8 @@ class PngIDatChunkInputStream extends InputStream {
 	}

 

 	/**

-	 * 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 {

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java
index 8cb4295a5..e42dd8733 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngReader.java
@@ -1,940 +1,1000 @@
-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.InflaterInputStream;

-

-import jogamp.opengl.util.pngj.ImageInfo;

-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 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;

-	/**

-	 * 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);

-		// 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];

-		interlaced = ihdr.getInterlaced() == 1;

-		deinterlacer = interlaced ? new PngDeinterlacer(imgInfo) : null;

-		// 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;

-	}

-

-	/**

-	 * 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, rowb.length - 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);

-		idatIstream = new InflaterInputStream(iIdatCstream);

-		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 && firstChunksNotYetRead())

-			readFirstChunks();

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

-		try {

-			int r;

-			do {

-				r = iIdatCstream.read(rowbfilter, 0, rowbfilter.length);

-			} 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;

-	}

-

-	/**

-	 * 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.

-	 */

-	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.
+	 */
+	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 601cd96c0..3e684a881 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngWriter.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngWriter.java
@@ -83,8 +83,9 @@ public class PngWriter {
 	}

 

 	/**

-	 * 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.

+	 * 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.

 	 * 

@@ -418,13 +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);

@@ -433,14 +436,15 @@ 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);

@@ -449,8 +453,8 @@ public class PngWriter {
 	/**

 	 * Computes compressed size/raw size, approximate.

 	 * <p>

-	 * Actually: compressed size = total size of IDAT data , raw size = uncompressed pixel bytes = rows * (bytesPerRow +

-	 * 1).

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

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

 	 * 

 	 * This must be called after pngw.end()

 	 */

@@ -463,7 +467,8 @@ public class PngWriter {
 	}

 

 	/**

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

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

+	 * after writing the lines.

 	 */

 	public void end() {

 		if (rowNum != imgInfo.rows - 1)

@@ -525,15 +530,17 @@ public class PngWriter {
 	 * 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

+	 *            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

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

+	 * performance you should rarely call this

 	 * <p>

 	 * 

 	 * @param idatMaxSize

@@ -553,7 +560,8 @@ public class PngWriter {
 	}

 

 	/**

-	 * Deflater strategy: one of Deflater.FILTERED Deflater.HUFFMAN_ONLY Deflater.DEFAULT_STRATEGY

+	 * Deflater strategy: one of Deflater.FILTERED Deflater.HUFFMAN_ONLY

+	 * Deflater.DEFAULT_STRATEGY

 	 * <p>

 	 * Default: Deflater.FILTERED . This should be changed very rarely.

 	 */

@@ -562,8 +570,8 @@ public class PngWriter {
 	}

 

 	/**

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

-	 * rown)

+	 * 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)

 	 */

@@ -607,18 +615,22 @@ public class PngWriter {
 	/**

 	 * 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.

+	 * 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)

+	 * 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)

+	 *            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

+	 *            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);

@@ -627,8 +639,9 @@ public class PngWriter {
 	}

 

 	/**

-	 * 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)

+	 * 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)

 	 */

@@ -659,12 +672,15 @@ public class PngWriter {
 	}

 

 	/**

-	 * If false (default), and image has bitdepth 1-2-4, the scanlines passed are assumed to be already packed.

+	 * 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.

+	 * 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.

+	 * 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/PngjExceptionInternal.java b/src/jogl/classes/jogamp/opengl/util/pngj/PngjExceptionInternal.java
index 963abc50e..c429b893b 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/PngjExceptionInternal.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/PngjExceptionInternal.java
@@ -1,7 +1,8 @@
 package jogamp.opengl.util.pngj;

 

 /**

- * Exception for anomalous internal problems (sort of asserts) that point to some issue with the library

+ * Exception for anomalous internal problems (sort of asserts) that point to

+ * some issue with the library

  * 

  * @author Hernan J Gonzalez

  * 

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 a5bad666c..4516a0886 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/ProgressiveOutputStream.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/ProgressiveOutputStream.java
@@ -4,7 +4,8 @@ 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;

@@ -50,8 +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) {

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 ed091d35a..a995e4481 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkHelper.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkHelper.java
@@ -1,253 +1,297 @@
-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.DeflaterOutputStream;

-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";

-

-	/**

-	 * 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);

-			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;

-	}

-

-	/**

-	 * 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;

-	}

-

-}

+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>() {
+		protected Inflater initialValue() {
+			return new Inflater();
+		}
+	};
+
+	private static final ThreadLocal<Deflater> deflaterProvider = new ThreadLocal<Deflater>() {
+		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/ChunkLoadBehaviour.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java
index 03d50c2c4..82ab3bcf9 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkLoadBehaviour.java
@@ -1,7 +1,8 @@
 package jogamp.opengl.util.pngj.chunks;

 

 /**

- * Defines gral strategy about what to do with ancillary (non-critical) chunks when reading

+ * Defines gral strategy about what to do with ancillary (non-critical) chunks

+ * when reading

  */

 public enum ChunkLoadBehaviour {

 	/**

@@ -9,7 +10,8 @@ public enum ChunkLoadBehaviour {
 	 */

 	LOAD_CHUNK_NEVER,

 	/**

-	 * Ancillary chunks are loaded only if 'known' (registered with the factory).

+	 * Ancillary chunks are loaded only if 'known' (registered with the

+	 * factory).

 	 */

 	LOAD_CHUNK_KNOWN,

 	/**

@@ -19,7 +21,8 @@ public enum ChunkLoadBehaviour {
 	LOAD_CHUNK_IF_SAFE,

 	/**

 	 * Load all chunks. <br>

-	 * Notice that other restrictions might apply, see PngReader.skipChunkMaxSize PngReader.skipChunkIds

+	 * 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/ChunkRaw.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java
index 8dd0ef476..3aba26cca 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunkRaw.java
@@ -13,13 +13,15 @@ import jogamp.opengl.util.pngj.PngjOutputException;
 /**

  * Raw (physical) chunk.

  * <p>

- * Short lived object, to be created while serialing/deserializing Do not reuse it for different chunks. <br>

+ * 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.

+	 * 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;

 

@@ -29,12 +31,14 @@ public class ChunkRaw {
 	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

+	 * 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.

+	 * 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;

 

@@ -71,7 +75,8 @@ public class ChunkRaw {
 	}

 

 	/**

-	 * Computes the CRC and writes to the stream. If error, a PngjOutputException is thrown

+	 * Computes the CRC and writes to the stream. If error, a

+	 * PngjOutputException is thrown

 	 */

 	public void writeChunk(OutputStream os) {

 		if (idbytes.length != 4)

@@ -85,8 +90,8 @@ public class ChunkRaw {
 	}

 

 	/**

-	 * 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, boolean checkCrc) {

 		PngHelperInternal.readBytes(is, data, 0, 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
index ad788f154..5ce94ff9f 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksList.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksList.java
@@ -49,8 +49,8 @@ public class ChunksList {
 	}

 

 	/**

-	 * Returns a copy of the list (but the chunks are not copied) <b> This should not be used for general metadata

-	 * handling

+	 * 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);

@@ -96,7 +96,8 @@ public class ChunksList {
 	}

 

 	/**

-	 * If innerid!=null and the chunk is PngChunkTextVar or PngChunkSPLT, it's filtered by that id

+	 * 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

@@ -119,8 +120,9 @@ public class ChunksList {
 	/**

 	 * 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)

+	 * 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);

@@ -129,8 +131,9 @@ public class ChunksList {
 	/**

 	 * 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)

+	 * 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);

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java
index 204c4c2a5..e76456ad4 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/ChunksListForWrite.java
@@ -13,7 +13,8 @@ import jogamp.opengl.util.pngj.PngjOutputException;
 public class ChunksListForWrite extends ChunksList {
 
 	/**
-	 * chunks not yet writen - does not include IHDR, IDAT, END, perhaps yes PLTE
+	 * chunks not yet writen - does not include IHDR, IDAT, END, perhaps yes
+	 * PLTE
 	 */
 	private final List<PngChunk> queuedChunks = new ArrayList<PngChunk>();
 
@@ -67,8 +68,9 @@ public class ChunksListForWrite extends ChunksList {
 	/**
 	 * 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!
+	 * 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);
@@ -87,7 +89,8 @@ public class ChunksListForWrite extends ChunksList {
 	}
 
 	/**
-	 * this should be called only for ancillary chunks and PLTE (groups 1 - 3 - 5)
+	 * 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)
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 1d630591e..a45979ec2 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunk.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunk.java
@@ -12,13 +12,16 @@ import jogamp.opengl.util.pngj.PngjExceptionInternal;
  * 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>

+ * 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}

+ * 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>

+ * 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 {

@@ -35,8 +38,9 @@ public abstract class PngChunk {
 	protected final ImageInfo imgInfo;

 

 	/**

-	 * 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.

+	 * 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 {

 		/**

@@ -83,8 +87,8 @@ public abstract class PngChunk {
 	/**

 	 * 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)

+	 * The client can add other chunks to this map statically, before reading an

+	 * image, calling PngChunk.factoryRegister(id,class)

 	 */

 	private final static Map<String, Class<? extends PngChunk>> factoryMap = new HashMap<String, Class<? extends PngChunk>>();

 	static {

@@ -114,8 +118,9 @@ public abstract class PngChunk {
 	/**

 	 * 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.

+	 * 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);

@@ -124,9 +129,11 @@ public abstract class PngChunk {
 	/**

 	 * True if the chunk-id type is known.

 	 * <p>

-	 * A chunk is known if we recognize its class, according with <code>factoryMap</code>

+	 * 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

+	 * 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}

 	 */

@@ -143,7 +150,8 @@ public abstract class PngChunk {
 	}

 

 	/**

-	 * This factory creates the corresponding chunk and parses the raw chunk. This is used when reading.

+	 * 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);

@@ -153,7 +161,8 @@ public abstract class PngChunk {
 	}

 

 	/**

-	 * Creates one new blank chunk of the corresponding type, according to factoryMap (PngChunkUNKNOWN if not known)

+	 * 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;

@@ -189,7 +198,8 @@ public abstract class PngChunk {
 	}

 

 	/**

-	 * In which "chunkGroup" (see {@link ChunksList}for definition) this chunks instance was read or written.

+	 * In which "chunkGroup" (see {@link ChunksList}for definition) this chunks

+	 * instance was read or written.

 	 * <p>

 	 * -1 if not read or written (eg, queued)

 	 */

@@ -236,16 +246,16 @@ public abstract class PngChunk {
 	}

 

 	/**

-	 * Creates the physical chunk. This is used when writing (serialization). Each particular chunk class implements its

-	 * own logic.

+	 * 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.

+	 * 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);

 

@@ -254,7 +264,8 @@ public abstract class PngChunk {
 	 * <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

+	 * It should normally be a deep copy, and after the cloning

+	 * this.equals(other) should return true

 	 */

 	public abstract void cloneDataFromRead(PngChunk other);

 

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 b816db205..911513c0d 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIDAT.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkIDAT.java
@@ -7,7 +7,8 @@ import jogamp.opengl.util.pngj.ImageInfo;
  * <p>

  * see http://www.w3.org/TR/PNG/#11IDAT

  * <p>

- * This is dummy placeholder - we write/read this chunk (actually several) by special code.

+ * 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;

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java
index 696edd431..d44250a2f 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkMultiple.java
@@ -17,7 +17,8 @@ public abstract class PngChunkMultiple extends PngChunk {
 	}

 

 	/**

-	 * NOTE: this chunk uses the default Object's equals() hashCode() implementation.

+	 * NOTE: this chunk uses the default Object's equals() hashCode()

+	 * implementation.

 	 * 

 	 * This is the right thing to do, normally.

 	 * 

diff --git a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
index 286f39db0..5247169e0 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkSingle.java
@@ -3,7 +3,8 @@ 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.

+ * PNG chunk type (abstract) that does not allow multiple instances in same

+ * image.

  */

 public abstract class PngChunkSingle extends PngChunk {

 

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 1de5c0833..b68776477 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTRNS.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngChunkTRNS.java
@@ -1,143 +1,141 @@
-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.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;

-	}

-

-	/**

-	 * 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() {

-		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/PngMetadata.java b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java
index 52d1b22c1..ecf8b98c3 100644
--- a/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java
+++ b/src/jogl/classes/jogamp/opengl/util/pngj/chunks/PngMetadata.java
@@ -7,13 +7,13 @@ 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
  * <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
+ * 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 ChunksList chunkList;
@@ -31,8 +31,9 @@ public class PngMetadata {
 	/**
 	 * 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.
+	 * 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 void queueChunk(final PngChunk c, boolean lazyOverwrite) {
 		ChunksListForWrite cl = getChunkListW();
@@ -87,7 +88,8 @@ public class PngMetadata {
 	 * 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
+	 * @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);
@@ -104,7 +106,8 @@ public class PngMetadata {
 	 * 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
+	 * @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);
@@ -137,7 +140,8 @@ public class PngMetadata {
 	 *            (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
+	 * @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)
@@ -180,7 +184,8 @@ public class PngMetadata {
 	}
 
 	/**
-	 * Returns empty if not found, concatenated (with newlines) if multiple! - and trimmed
+	 * Returns empty if not found, concatenated (with newlines) if multiple! -
+	 * and trimmed
 	 * <p>
 	 * Use getTxtsForKey() if you don't want this behaviour
 	 */
@@ -204,7 +209,8 @@ public class PngMetadata {
 	}
 
 	/**
-	 * Creates a new empty palette chunk, queues it for write and return it to the caller, who should fill its entries
+	 * 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);
@@ -222,7 +228,8 @@ public class PngMetadata {
 	}
 
 	/**
-	 * Creates a new empty TRNS chunk, queues it for write and return it to the caller, who should fill its entries
+	 * 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);
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
index 4444e9d63..bf2d3fa47 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
@@ -80,7 +80,7 @@ public class WGLGLCapabilities extends GLCapabilities {
     
   public static final String PFD2String(PIXELFORMATDESCRIPTOR pfd, int pfdID) {
       final int dwFlags = pfd.getDwFlags();
-      StringBuffer sb = new StringBuffer();
+      StringBuilder sb = new StringBuilder();
       boolean sep = false;
       
       if( 0 != (GDI.PFD_DRAW_TO_WINDOW & dwFlags ) ) {
@@ -270,4 +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..3e788d286 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLUtil.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLUtil.java
@@ -51,6 +51,7 @@ public class WGLUtil {
     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.");
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
index 94153d96d..b8979c91e 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
@@ -563,7 +563,13 @@ public class WindowsWGLContext extends GLContextImpl {
   }
 
   @Override
-  public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
-    return getWGLExt().wglAllocateMemoryNV(arg0, arg1, arg2, arg3);
+  public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {  
+    return getWGLExt().wglAllocateMemoryNV(size, readFrequency, writeFrequency, priority);
   }
+  
+  @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 8b8cb2052..741e671eb 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawable.java
@@ -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;
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
index 5fb01d1a3..338a351cb 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
@@ -43,6 +43,8 @@ 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;
@@ -88,19 +90,24 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
     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>() {
+                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);
-            }
+            } );
         }
     }
 
@@ -463,7 +470,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   @Override
-  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
+  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
     SharedResource sr = getOrCreateSharedResourceImpl( ( null != device ) ? device : defaultDevice );
     if(null!=sr) {
         return sr.hasARBPBuffer();
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java
index a553bd4c2..7ec6c50f8 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDynamicLibraryBundleInfo.java
@@ -31,13 +31,13 @@ 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");
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
index c37bcee50..4bfe0cb86 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
@@ -524,16 +524,6 @@ public class X11GLXContext extends GLContextImpl {
   }
 
   @Override
-  public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals(GLExtensions.ARB_pbuffer) ||
-        glExtensionName.equals(GLExtensions.ARB_pixel_format)) {
-      return getGLDrawable().getFactory().canCreateGLPbuffer(
-          drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice() );
-    }
-    return super.isExtensionAvailable(glExtensionName);
-  }
-
-  @Override
   protected boolean setSwapIntervalImpl(int interval) {
     if( !drawable.getChosenGLCapabilities().isOnscreen() ) { return false; } 
 
@@ -633,11 +623,16 @@ public class X11GLXContext extends GLContextImpl {
   }
 
   @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);
   }
 
   @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/X11GLXDrawableFactory.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
index 394293bc0..52069b88f 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
@@ -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;
@@ -91,19 +93,24 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
     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>() {
+                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);
-            }
+            } );
         }
     }
 
@@ -483,7 +490,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   @Override
-  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
+  public final boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
       if(null == device) {
         SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(defaultDevice);
         if(null!=sr) {
@@ -544,7 +551,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
 
   @Override
   public final boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
-    return canCreateGLPbuffer(device);
+    return canCreateGLPbuffer(device, null /* GLProfile not used for query on X11 */);
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java
index 108c157a8..f25f7ae2c 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDynamicLibraryBundleInfo.java
@@ -31,13 +31,13 @@ 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>();
         
@@ -60,15 +60,6 @@ public class X11GLXDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundl
         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() {
         List<String> res = new ArrayList<String>();