Merge branch 'master' into stash_glyphcache

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

16 files changed, 1401 insertions, 1237 deletions

diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
index 3cd4b340c..259c70641 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,6 +41,7 @@
 package jogamp.opengl.macosx.cgl;
 
 import java.nio.ByteBuffer;
+import java.nio.IntBuffer;
 import java.util.Map;
 
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
@@ -48,110 +49,180 @@ import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.OffscreenLayerSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2ES2;
+import javax.media.opengl.GL3ES3;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
+import javax.media.opengl.GLUniformData;
 
+import jogamp.nativewindow.macosx.OSXUtil;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLFBODrawableImpl;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
 
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.VersionNumber;
+import com.jogamp.common.util.locks.RecursiveLock;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLRendererQuirks;
+import com.jogamp.opengl.util.PMVMatrix;
+import com.jogamp.opengl.util.glsl.ShaderCode;
+import com.jogamp.opengl.util.glsl.ShaderProgram;
 
-public abstract class MacOSXCGLContext extends GLContextImpl
-{    
+public class MacOSXCGLContext extends GLContextImpl
+{
   // Abstract interface for implementation of this context (either
   // NSOpenGL-based or CGL-based)
   protected interface GLBackendImpl {
         boolean isNSContext();
         long create(long share, int ctp, int major, int minor);
         boolean destroy(long ctx);
+        void associateDrawable(boolean bound);
         boolean copyImpl(long src, int mask);
         boolean makeCurrent(long ctx);
         boolean release(long ctx);
+        boolean detachPBuffer();
         boolean setSwapInterval(int interval);
         boolean swapBuffers();
   }
-      
+
   /* package */ static final boolean isTigerOrLater;
   /* package */ static final boolean isLionOrLater;
+  /* package */ static final boolean isMavericksOrLater;
 
   static {
     final VersionNumber osvn = Platform.getOSVersionNumber();
-    isTigerOrLater = osvn.getMajor() > 10 || ( osvn.getMajor() == 10 && osvn.getMinor() >= 4 );
-    isLionOrLater  = osvn.getMajor() > 10 || ( osvn.getMajor() == 10 && osvn.getMinor() >= 7 );
+    isTigerOrLater = osvn.compareTo(Platform.OSXVersion.Tiger) >= 0;
+    isLionOrLater = osvn.compareTo(Platform.OSXVersion.Lion) >= 0;
+    isMavericksOrLater = osvn.compareTo(Platform.OSXVersion.Mavericks) >= 0;
   }
 
   static boolean isGLProfileSupported(int ctp, int major, int minor) {
     boolean ctBwdCompat = 0 != ( CTX_PROFILE_COMPAT & ctp ) ;
     boolean ctCore      = 0 != ( CTX_PROFILE_CORE & ctp ) ;
-    
+
     // We exclude 3.0, since we would map it's core to GL2. Hence we force mapping 2.1 to GL2
-    if(3==major && 1<=minor && minor<=2) {
-        // [3.1..3.2] -> GL3*
+    if( 3 < major || 3 == major && 1 <= minor ) {
+        if(ctBwdCompat || !ctCore) {
+            // No compatibility profile on OS X
+            // Only core is supported
+            return false;
+        }
         if(!isLionOrLater) {
-            // no GL3* on pre lion
+            // no GL Profile >= GL3 core on pre lion
             return false;
         }
-        if(ctBwdCompat) {
-            // no compatibility profile on OS X
+        if(3 < major && !isMavericksOrLater) {
+            // no GL Profile >= GL4 core on pre mavericks
             return false;
         }
-        return ctCore;
-    } else if(major<3) {
+        // [3.1..3.x] -> GL3
+        // [4.0..4.x] -> GL4
+        return true;
+    } else if( major < 3 ) {
         // < 3.0 -> GL2
         return true;
     }
     return false; // 3.0 && > 3.2
   }
-  static int GLProfile2CGLOGLProfileValue(int ctp, int major, int minor) {
+  static int GLProfile2CGLOGLProfileValue(AbstractGraphicsDevice device, int ctp, int major, int minor) {
     if(!MacOSXCGLContext.isGLProfileSupported(ctp, major, minor)) {
         throw new GLException("OpenGL profile not supported: "+getGLVersion(major, minor, ctp, "@GLProfile2CGLOGLProfileVersion"));
     }
-    boolean ctCore      = 0 != ( CTX_PROFILE_CORE & ctp ) ;
-    if( major == 3 && minor >= 1 && ctCore ) {
-        return CGL.kCGLOGLPVersion_3_2_Core;
+    final boolean ctCore = 0 != ( CTX_PROFILE_CORE & ctp ) ;
+
+    if( major == 4 && ctCore ) {
+        if( GLRendererQuirks.existStickyDeviceQuirk(device, GLRendererQuirks.GL4NeedsGL3Request) ) {
+            // Thread safe GLRendererQuirks sticky access, since we are only interested of the result _after_ GL version mapping,
+            // i.e. after single threaded initialization!
+            return CGL.kCGLOGLPVersion_GL3_Core;
+        } else {
+            return CGL.kCGLOGLPVersion_GL4_Core;
+        }
+    } else if( major == 3 && minor >= 1 && ctCore ) {
+        return CGL.kCGLOGLPVersion_GL3_Core;
     } else {
         return CGL.kCGLOGLPVersion_Legacy;
-    }        
-  }  
+    }
+  }
+
+  private static final String shaderBasename = "texture01_xxx";
+
+  private static ShaderProgram createCALayerShader(GL3ES3 gl) {
+      // Create & Link the shader program
+      final ShaderProgram sp = new ShaderProgram();
+      final ShaderCode vp = ShaderCode.create(gl, GL2ES2.GL_VERTEX_SHADER, MacOSXCGLContext.class,
+                                              "../../shader", "../../shader/bin", shaderBasename, true);
+      final ShaderCode fp = ShaderCode.create(gl, GL2ES2.GL_FRAGMENT_SHADER, MacOSXCGLContext.class,
+                                              "../../shader", "../../shader/bin", shaderBasename, true);
+      vp.defaultShaderCustomization(gl, true, true);
+      fp.defaultShaderCustomization(gl, true, true);
+      sp.add(vp);
+      sp.add(fp);
+      if(!sp.link(gl, System.err)) {
+          throw new GLException("Couldn't link program: "+sp);
+      }
+      sp.useProgram(gl, true);
+
+      // setup mgl_PMVMatrix
+      final PMVMatrix pmvMatrix = new PMVMatrix();
+      pmvMatrix.glMatrixMode(PMVMatrix.GL_PROJECTION);
+      pmvMatrix.glLoadIdentity();
+      pmvMatrix.glMatrixMode(PMVMatrix.GL_MODELVIEW);
+      pmvMatrix.glLoadIdentity();
+      final GLUniformData pmvMatrixUniform = new GLUniformData("mgl_PMVMatrix", 4, 4, pmvMatrix.glGetPMvMatrixf()); // P, Mv
+      pmvMatrixUniform.setLocation(gl, sp.program());
+      gl.glUniform(pmvMatrixUniform);
+
+      sp.useProgram(gl, false);
+      return sp;
+  }
+
 
   private boolean haveSetOpenGLMode = false;
   private GLBackendType openGLMode = GLBackendType.NSOPENGL;
-  
+
   // Implementation object (either NSOpenGL-based or CGL-based)
   protected GLBackendImpl impl;
-      
+
   private CGLExt _cglExt;
   // Table that holds the addresses of the native C-language entry points for
   // CGL extension functions.
   private CGLExtProcAddressTable cglExtProcAddressTable;
-  
+
+  private long updateHandle = 0;
+  private int lastWidth, lastHeight;
+
   protected MacOSXCGLContext(GLDrawableImpl drawable,
                    GLContext shareWith) {
     super(drawable, shareWith);
     initOpenGLImpl(getOpenGLMode());
   }
-  
+
   @Override
-  protected void resetStates() {
+  protected void resetStates(boolean isInit) {
     // no inner state _cglExt = null;
     cglExtProcAddressTable = null;
-    super.resetStates();
+    super.resetStates(isInit);
   }
 
+  @Override
   public Object getPlatformGLExtensions() {
     return getCGLExt();
   }
 
-  protected boolean isNSContext() { 
-      return (null != impl) ? impl.isNSContext() : this.openGLMode == GLBackendType.NSOPENGL; 
+  protected boolean isNSContext() {
+      return (null != impl) ? impl.isNSContext() : this.openGLMode == GLBackendType.NSOPENGL;
   }
 
   public CGLExt getCGLExt() {
@@ -161,6 +232,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return _cglExt;
   }
 
+  @Override
   public final ProcAddressTable getPlatformExtProcAddressTable() {
     return getCGLExtProcAddressTable();
   }
@@ -169,10 +241,13 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return cglExtProcAddressTable;
   }
 
+  @Override
   protected Map<String, String> getFunctionNameMap() { return null; }
 
+  @Override
   protected Map<String, String> getExtensionNameMap() { return null; }
 
+  @Override
   protected long createContextARBImpl(long share, boolean direct, int ctp, int major, int minor) {
     if(!isGLProfileSupported(ctp, major, minor)) {
         if(DEBUG) {
@@ -200,69 +275,130 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return ctx;
   }
 
+  @Override
   protected void destroyContextARBImpl(long _context) {
       impl.release(_context);
       impl.destroy(_context);
   }
 
+  @Override
   public final boolean isGLReadDrawableAvailable() {
     return false;
   }
 
-  protected long createImplPreset(GLContextImpl shareWith) throws GLException {
-    long share = 0;
-    if (shareWith != null) {
-      // Change our OpenGL mode to match that of any share context before we create ourselves
-      setOpenGLMode(((MacOSXCGLContext)shareWith).getOpenGLMode());
-      share = shareWith.getHandle();
-      if (share == 0) {
-        throw new GLException("GLContextShareSet returned a NULL OpenGL context");
-      }
-    }
-    
-    MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
-    GLCapabilitiesImmutable capabilitiesChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-    if (capabilitiesChosen.getPbufferFloatingPointBuffers() && !isTigerOrLater) {
-       throw new GLException("Floating-point pbuffers supported only on OS X 10.4 or later");
-    }
-    GLProfile glp = capabilitiesChosen.getGLProfile();
-    if(glp.isGLES1() || glp.isGLES2() || glp.isGL4() || glp.isGL3() && !isLionOrLater) {
+  @Override
+  protected boolean createImpl(final long shareWithHandle) throws GLException {
+    final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
+    final GLCapabilitiesImmutable capabilitiesChosen = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final GLProfile glp = capabilitiesChosen.getGLProfile();
+    if( glp.isGLES() ||
+        ( glp.isGL3() && !isLionOrLater ) || ( glp.isGL4() && !isMavericksOrLater ) ) {
         throw new GLException("OpenGL profile not supported on MacOSX "+Platform.getOSVersionNumber()+": "+glp);
     }
-    
-    if (DEBUG) {
-      System.err.println("Share context is " + toHexString(share) + " for " + this);
+    if( 0 != shareWithHandle && GLBackendType.NSOPENGL != getOpenGLMode() ) {
+        throw new GLException("Context sharing only supported in mode "+GLBackendType.NSOPENGL+": "+this);
     }
-    return share;      
-  }
-  
-  protected boolean createImpl(GLContextImpl shareWith) throws GLException {
-    long share = createImplPreset(shareWith);
-    contextHandle = createContextARB(share, true);
+    contextHandle = createContextARB(shareWithHandle, true);
     return 0 != contextHandle;
   }
-  
+
+  @Override
   protected void makeCurrentImpl() throws GLException {
+    /** FIXME: won't work w/ special drawables (like FBO) - check for CGL mode regressions!
+     *
     if (getOpenGLMode() != ((MacOSXCGLDrawable)drawable).getOpenGLMode()) {
       setOpenGLMode(((MacOSXCGLDrawable)drawable).getOpenGLMode());
-    }
+    } */
     if (!impl.makeCurrent(contextHandle)) {
       throw new GLException("Error making Context current: "+this);
-    }      
+    }
+    drawableUpdatedNotify();
   }
-    
+
+  @Override
   protected void releaseImpl() throws GLException {
     if (!impl.release(contextHandle)) {
       throw new GLException("Error releasing OpenGL Context: "+this);
     }
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
+    releaseUpdateHandle();
     if(!impl.destroy(contextHandle)) {
         throw new GLException("Error destroying OpenGL Context: "+this);
     }
   }
 
+  private final long getUpdateHandle() {
+    if( 0 == updateHandle ) {
+        lastWidth = -1;
+        lastHeight = -1;
+        if( isCreated() && drawable.getChosenGLCapabilities().isOnscreen() && isNSContext() ) {
+            final boolean incompleteView;
+            final NativeSurface surface = drawable.getNativeSurface();
+            if( surface instanceof ProxySurface ) {
+              incompleteView = ((ProxySurface)surface).containsUpstreamOptionBits( ProxySurface.OPT_UPSTREAM_WINDOW_INVISIBLE );
+            } else {
+              incompleteView = false;
+            }
+            if(!incompleteView) {
+                updateHandle = CGL.updateContextRegister(contextHandle, drawable.getHandle());
+                if(0 == updateHandle) {
+                    throw new InternalError("XXX2");
+                }
+            }
+        }
+    }
+    return updateHandle;
+  }
+
+  private final void releaseUpdateHandle() {
+    if ( 0 != updateHandle ) {
+        CGL.updateContextUnregister(updateHandle);
+        updateHandle = 0;
+    }
+  }
+
+  @Override
+  protected void drawableUpdatedNotify() throws GLException {
+    if( drawable.getChosenGLCapabilities().isOnscreen() ) {
+        final long _updateHandle = getUpdateHandle();
+        final int w = drawable.getWidth();
+        final int h = drawable.getHeight();
+        final boolean updateContext = ( 0!=_updateHandle && CGL.updateContextNeedsUpdate(_updateHandle) ) ||
+                                      w != lastWidth || h != lastHeight;
+        if(updateContext) {
+            lastWidth = w;
+            lastHeight = h;
+            if (contextHandle == 0) {
+              throw new GLException("Context not created");
+            }
+            CGL.updateContext(contextHandle);
+        }
+    }
+  }
+
+  @Override
+  protected void associateDrawable(boolean bound) {
+      // context stuff depends on drawable stuff
+      if(bound) {
+          super.associateDrawable(true);   // 1) init drawable stuff
+          impl.associateDrawable(true);    // 2) init context stuff
+          getUpdateHandle();
+      } else {
+          releaseUpdateHandle();
+          impl.associateDrawable(false);   // 1) free context stuff
+          super.associateDrawable(false);  // 2) free drawable stuff
+      }
+  }
+
+  /* pp */ void detachPBuffer() {
+      impl.detachPBuffer();
+  }
+
+
+  @Override
   protected void copyImpl(GLContext source, int mask) throws GLException {
     if( isNSContext() != ((MacOSXCGLContext)source).isNSContext() ) {
         throw new GLException("Source/Destination OpenGL Context tyoe mismatch: source "+source+", dest: "+this);
@@ -275,7 +411,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
   protected void swapBuffers() {
     // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
     if(!impl.swapBuffers()) {
-        throw new GLException("Error swapping buffers: "+this);        
+        throw new GLException("Error swapping buffers: "+this);
     }
   }
 
@@ -284,11 +420,19 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     return impl.setSwapInterval(interval);
   }
 
-  public ByteBuffer glAllocateMemoryNV(int arg0, float arg1, float arg2, float arg3) {
+  @Override
+  public final ByteBuffer glAllocateMemoryNV(int size, float readFrequency, float writeFrequency, float priority) {
+    // FIXME: apparently the Apple extension doesn't require a custom memory allocator
+    throw new GLException("Not yet implemented");
+  }
+
+  @Override
+  public final void glFreeMemoryNV(ByteBuffer pointer) {
     // FIXME: apparently the Apple extension doesn't require a custom memory allocator
     throw new GLException("Not yet implemented");
   }
 
+  @Override
   protected final void updateGLXProcAddressTable() {
     final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
     final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
@@ -316,39 +460,12 @@ public abstract class MacOSXCGLContext extends GLContextImpl
         }
     }
   }
-    
+
+  @Override
   protected final StringBuilder getPlatformExtensionsStringImpl() {
     return new StringBuilder();
   }
-    
-  public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals("GL_ARB_pbuffer") ||
-        glExtensionName.equals("GL_ARB_pixel_format")) {
-      return true;
-    }
-    return super.isExtensionAvailable(glExtensionName);
-  }
-  
-  public int getOffscreenContextPixelDataType() {
-    throw new GLException("Should not call this");
-  }
-
-  public int getOffscreenContextReadBuffer() {
-    throw new GLException("Should not call this");
-  }
 
-  public boolean offscreenImageNeedsVerticalFlip() {
-    throw new GLException("Should not call this");
-  }
-
-  public void bindPbufferToTexture() {
-    throw new GLException("Should not call this");
-  }
-    
-  public void releasePbufferFromTexture() {
-    throw new GLException("Should not call this");
-  }
-    
   // Support for "mode switching" as described in MacOSXCGLDrawable
   public void setOpenGLMode(GLBackendType mode) {
       if (mode == openGLMode) {
@@ -364,10 +481,10 @@ public abstract class MacOSXCGLContext extends GLContextImpl
       }
       initOpenGLImpl(mode);
       openGLMode = mode;
-      haveSetOpenGLMode = true;      
+      haveSetOpenGLMode = true;
   }
   public final GLBackendType getOpenGLMode() { return openGLMode; }
-  
+
   protected void initOpenGLImpl(GLBackendType backend) {
     switch (backend) {
       case NSOPENGL:
@@ -379,8 +496,9 @@ public abstract class MacOSXCGLContext extends GLContextImpl
       default:
         throw new InternalError("Illegal implementation mode " + backend);
     }
-  }  
-  
+  }
+
+  @Override
   public String toString() {
     StringBuilder sb = new StringBuilder();
     sb.append(getClass().getSimpleName());
@@ -391,291 +509,736 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     sb.append("] ");
     return sb.toString();
   }
-  
+
   // NSOpenGLContext-based implementation
   class NSOpenGLImpl implements GLBackendImpl {
-    long nsOpenGLLayer = 0;
-    long nsOpenGLLayerPFmt = 0;
-    float screenVSyncTimeout; // microSec
-    int vsyncTimeout;    // microSec - for nsOpenGLLayer mode
-    
-    public boolean isNSContext() { return true; }
-
-    public long create(long share, int ctp, int major, int minor) {        
-        long ctx = 0;
-        final MacOSXCGLDrawable drawable = (MacOSXCGLDrawable) MacOSXCGLContext.this.drawable;
-        final NativeSurface surface = drawable.getNativeSurface();
-        final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) surface.getGraphicsConfiguration();
-        final OffscreenLayerSurface backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(surface, true);        
-        final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-        long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(chosenCaps, ctp, major, minor);
-        if (pixelFormat == 0) {
+      private OffscreenLayerSurface backingLayerHost = null;
+      /** lifecycle:  [create - destroy] */
+      private long pixelFormat = 0;
+      /** microSec - defaults to 1/60s */
+      private int screenVSyncTimeout = 16666;
+      /** microSec - for nsOpenGLLayer mode - defaults to 1/60s + 1ms */
+      private volatile int vsyncTimeout = 16666 + 1000;
+      private int lastWidth=0, lastHeight=0; // allowing to detect size change
+      private boolean needsSetContextPBuffer = false;
+      private ShaderProgram gl3ShaderProgram = null;
+
+      @Override
+      public boolean isNSContext() { return true; }
+
+
+      /** Only returns a valid NSView. If !NSView, return null and mark either pbuffer and FBO. */
+      private long getNSViewHandle(boolean[] isPBuffer, boolean[] isFBO) {
+          final long nsViewHandle;
+          if(drawable instanceof GLFBODrawableImpl) {
+              nsViewHandle = 0;
+              isPBuffer[0] = false;
+              isFBO[0] = true;
+              if(DEBUG) {
+                  System.err.println("NS viewHandle.1: GLFBODrawableImpl drawable: isFBO "+isFBO+", isPBuffer "+isPBuffer+", "+drawable.getClass().getName()+",\n\t"+drawable);
+              }
+          } else {
+              final long drawableHandle = drawable.getHandle();
+              final boolean isNSView = OSXUtil.isNSView(drawableHandle);
+              final boolean isNSWindow = OSXUtil.isNSWindow(drawableHandle);
+              isPBuffer[0] = CGL.isNSOpenGLPixelBuffer(drawableHandle);
+              isFBO[0] = false;
+
+              if( isNSView ) {
+                  nsViewHandle = drawableHandle;
+              } else if( isNSWindow ) {
+                  nsViewHandle = OSXUtil.GetNSView(drawableHandle);
+              } else if( isPBuffer[0] ) {
+                  nsViewHandle = 0;
+              } else {
+                  throw new RuntimeException("Drawable's handle neither NSView, NSWindow nor PBuffer: drawableHandle "+toHexString(drawableHandle)+", isNSView "+isNSView+", isNSWindow "+isNSWindow+", isFBO "+isFBO[0]+", isPBuffer "+isPBuffer[0]+", "+drawable.getClass().getName()+",\n\t"+drawable);
+              }
+              if(DEBUG) {
+                  System.err.println("NS viewHandle.2: drawableHandle "+toHexString(drawableHandle)+" -> nsViewHandle "+toHexString(nsViewHandle)+": isNSView "+isNSView+", isNSWindow "+isNSWindow+", isFBO "+isFBO[0]+", isPBuffer "+isPBuffer[0]+", "+drawable.getClass().getName()+",\n\t"+drawable);
+              }
+          }
+          needsSetContextPBuffer = isPBuffer[0];
+          return nsViewHandle;
+      }
+
+      @Override
+      public long create(long share, int ctp, int major, int minor) {
+          long ctx = 0;
+          final NativeSurface surface = drawable.getNativeSurface();
+          final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) surface.getGraphicsConfiguration();
+          final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+          final long nsViewHandle;
+          final boolean isPBuffer;
+          final boolean isFBO;
+          {
+              boolean[] _isPBuffer = { false };
+              boolean[] _isFBO = { false };
+              nsViewHandle = getNSViewHandle(_isPBuffer, _isFBO);
+              isPBuffer = _isPBuffer[0];
+              isFBO = _isFBO[0];
+          }
+          final OffscreenLayerSurface backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
+
+          boolean incompleteView = null != backingLayerHost;
+          if( !incompleteView && surface instanceof ProxySurface ) {
+              incompleteView = ((ProxySurface)surface).containsUpstreamOptionBits( ProxySurface.OPT_UPSTREAM_WINDOW_INVISIBLE );
+          }
+          {
+              final GLCapabilitiesImmutable targetCaps;
+              if( isFBO ) {
+                  // Use minimum GLCapabilities for the target surface w/ same profile
+                  targetCaps = new GLCapabilities( chosenCaps.getGLProfile() );
+              } else {
+                  targetCaps = chosenCaps;
+              }
+              pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(config.getScreen().getDevice(), targetCaps, ctp, major, minor);
+          }
+          if (pixelFormat == 0) {
+              if(DEBUG) {
+                  System.err.println("Unable to allocate pixel format with requested GLCapabilities: "+chosenCaps);
+              }
+              return 0;
+          }
+          final GLCapabilitiesImmutable fixedCaps;
+          if( isFBO ) {
+              // pixelformat of target doesn't affect caps w/ FBO
+              fixedCaps = chosenCaps;
+          } else {
+              final GLCapabilities _fixedCaps = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(chosenCaps.getGLProfile(), pixelFormat);
+              if( !_fixedCaps.isPBuffer() && isPBuffer ) {
+                  throw new InternalError("handle is PBuffer, fixedCaps not: "+drawable);
+              }
+              // determine on-/offscreen caps, since pformat is ambiguous
+              _fixedCaps.setPBuffer( isPBuffer ); // exclusive
+              _fixedCaps.setBitmap( false );      // n/a in our OSX impl.
+              _fixedCaps.setOnscreen( !isFBO && !isPBuffer );
+              fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(_fixedCaps, chosenCaps.isBackgroundOpaque());
+          }
+          final int sRefreshRate = OSXUtil.GetScreenRefreshRate(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getIndex());
+          if( 0 < sRefreshRate ) {
+              screenVSyncTimeout = 1000000 / sRefreshRate;
+          }
           if(DEBUG) {
-                System.err.println("Unable to allocate pixel format with requested GLCapabilities: "+chosenCaps);
+              System.err.println("NS create OSX>=lion "+isLionOrLater+", OSX>=mavericks "+isMavericksOrLater);
+              System.err.println("NS create incompleteView: "+incompleteView);
+              System.err.println("NS create backingLayerHost: "+backingLayerHost);
+              System.err.println("NS create share: "+share);
+              System.err.println("NS create drawable type: "+drawable.getClass().getName());
+              System.err.println("NS create drawable handle: isPBuffer "+isPBuffer+", isFBO "+isFBO);
+              System.err.println("NS create pixelFormat: "+toHexString(pixelFormat));
+              System.err.println("NS create chosenCaps: "+chosenCaps);
+              System.err.println("NS create fixedCaps: "+fixedCaps);
+              System.err.println("NS create drawable native-handle: "+toHexString(drawable.getHandle()));
+              System.err.println("NS create drawable NSView-handle: "+toHexString(nsViewHandle));
+              System.err.println("NS create screen refresh-rate: "+sRefreshRate+" hz, "+screenVSyncTimeout+" micros");
+              // Thread.dumpStack();
           }
-          return 0;
-        }
-        config.setChosenPixelFormat(pixelFormat);
-        int sRefreshRate = CGL.getScreenRefreshRate(drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getIndex());
-        screenVSyncTimeout = 1000000f / (float)sRefreshRate;
-        if(DEBUG) {
-            System.err.println("NS create OSX>=lion "+isLionOrLater);
-            System.err.println("NS create backendType: "+drawable.getOpenGLMode());
-            System.err.println("NS create backingLayerHost: "+backingLayerHost);
-            System.err.println("NS create share: "+share);
-            System.err.println("NS create chosenCaps: "+chosenCaps);
-            System.err.println("NS create pixelFormat: "+toHexString(pixelFormat));
-            System.err.println("NS create drawable native-handle: "+toHexString(drawable.getHandle()));
-            System.err.println("NS create drawable NSView-handle: "+toHexString(drawable.getNSViewHandle()));
-            System.err.println("NS create screen refresh-rate: "+sRefreshRate+" hz, "+screenVSyncTimeout+" micros");
-            // Thread.dumpStack();
-        }
-        try {
-          int[] viewNotReady = new int[1];
+          config.setChosenCapabilities(fixedCaps);
+
+          final IntBuffer viewNotReady = Buffers.newDirectIntBuffer(1);
           // Try to allocate a context with this
-          ctx = CGL.createContext(share,
-                                  drawable.getNSViewHandle(), null!=backingLayerHost,
-                                  pixelFormat,
-                                  chosenCaps.isBackgroundOpaque(),
-                                  viewNotReady, 0);
+          ctx = CGL.createContext(share, nsViewHandle, incompleteView,
+                  pixelFormat, chosenCaps.isBackgroundOpaque(), viewNotReady);
           if (0 == ctx) {
-            if(DEBUG) {
-                System.err.println("NS create failed: viewNotReady: "+ (1 == viewNotReady[0]));
-            }
-            return 0;
+              if(DEBUG) {
+                  System.err.println("NS create failed: viewNotReady: "+ (1 == viewNotReady.get(0)));
+              }
+              return 0;
           }
-    
-          if (!chosenCaps.isPBuffer() && !chosenCaps.isBackgroundOpaque()) {
+
+          if (chosenCaps.isOnscreen() && !chosenCaps.isBackgroundOpaque()) {
               // Set the context opacity
               CGL.setContextOpacity(ctx, 0);
           }
+          return ctx;
+      }
 
-          if(DEBUG) {
-              GLCapabilitiesImmutable caps0 = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(null, pixelFormat);
-              System.err.println("NS create pixelformat2GLCaps: "+caps0);
+      @Override
+      public boolean destroy(long ctx) {
+          if(0!=pixelFormat) {
+              CGL.deletePixelFormat(pixelFormat);
+              pixelFormat = 0;
           }
-          GLCapabilitiesImmutable fixedCaps = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(chosenCaps.getGLProfile(), pixelFormat);
-          fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(fixedCaps, chosenCaps.isBackgroundOpaque());
-          config.setChosenCapabilities(fixedCaps);          
-          if(DEBUG) {
-              System.err.println("NS create fixedCaps: "+fixedCaps);
+          return CGL.deleteContext(ctx, true);
+      }
+
+      /**
+       * NSOpenGLLayer creation and it's attachment is performed on the main-thread w/o [infinite] blocking.
+       * <p>
+       * Since NSOpenGLLayer creation requires this context for it's shared context creation,
+       * this method attempts to acquire the surface and context lock with {@link #screenVSyncTimeout}/2 maximum wait time.
+       * If the surface and context lock could not be acquired, this runnable is being re-queued for later execution.
+       * </p>
+       * <p>
+       * Hence this method blocks the main-thread only for a short period of time.
+       * </p>
+       */
+      class AttachGLLayerCmd implements Runnable {
+          final OffscreenLayerSurface ols;
+          final long ctx;
+          final int shaderProgram;
+          final long pfmt;
+          final long pbuffer;
+          final int texID;
+          final boolean isOpaque;
+          final int width;
+          final int height;
+          /** Synchronized by instance's monitor */
+          long nsOpenGLLayer;
+          /** Synchronized by instance's monitor */
+          boolean valid;
+
+          AttachGLLayerCmd(OffscreenLayerSurface ols, long ctx, int shaderProgram, long pfmt, long pbuffer, int texID, boolean isOpaque, int width, int height) {
+              this.ols = ols;
+              this.ctx = ctx;
+              this.shaderProgram = shaderProgram;
+              this.pfmt = pfmt;
+              this.pbuffer = pbuffer;
+              this.texID = texID;
+              this.isOpaque = isOpaque;
+              this.width = width;
+              this.height = height;
+              this.valid = false;
+              this.nsOpenGLLayer = 0;
           }
-          if(fixedCaps.isPBuffer()) {
-              // Must now associate the pbuffer with our newly-created context
-              CGL.setContextPBuffer(ctx, drawable.getHandle());
+
+          public final String contentToString() {
+              return "valid "+valid+", size "+width+"x"+height+", ctx "+toHexString(ctx)+", opaque "+isOpaque+", texID "+texID+", pbuffer "+toHexString(pbuffer)+", nsOpenGLLayer "+toHexString(nsOpenGLLayer);
           }
-          //
-          // handled layered surface
-          // 
-          if(null != backingLayerHost) {
-              nsOpenGLLayerPFmt = pixelFormat;
-              pixelFormat = 0;
-              final int texWidth, texHeight;
-              if(drawable instanceof MacOSXPbufferCGLDrawable) {
-                  final MacOSXPbufferCGLDrawable osxPDrawable = (MacOSXPbufferCGLDrawable)drawable;
-                  texWidth = osxPDrawable.getTextureWidth();
-                  texHeight = osxPDrawable.getTextureHeight();
-              } else {
-                  texWidth = drawable.getWidth();
-                  texHeight = drawable.getHeight();                  
-              }              
-              nsOpenGLLayer = CGL.createNSOpenGLLayer(ctx, nsOpenGLLayerPFmt, drawable.getHandle(), fixedCaps.isBackgroundOpaque(), texWidth, texHeight);
-              if(0>=texWidth || 0>=texHeight || !drawable.isRealized()) {
-                  throw new GLException("Drawable not realized yet or invalid texture size, texSize "+texWidth+"x"+texHeight+", "+drawable);
-              }
-              if (DEBUG) {
-                  System.err.println("NS create nsOpenGLLayer "+toHexString(nsOpenGLLayer)+", texSize "+texWidth+"x"+texHeight+", "+drawable);
-              }
-              backingLayerHost.attachSurfaceLayer(nsOpenGLLayer);
-              setSwapInterval(1); // enabled per default in layered surface
+
+          @Override
+          public final String toString() {
+              return "AttachGLLayerCmd["+contentToString()+"]";
           }
-        } finally {
-          if(0!=pixelFormat) {
-              CGL.deletePixelFormat(pixelFormat);
+
+          @Override
+          public void run() {
+              synchronized(this) {
+                  if( !valid ) {
+                      try {
+                          final int maxwait = screenVSyncTimeout/2000; // TO 1/2 of current screen-vsync in [ms]
+                          final RecursiveLock surfaceLock = ols.getLock();
+                          if( surfaceLock.tryLock( maxwait ) ) {
+                              try {
+                                  if( MacOSXCGLContext.this.lock.tryLock( maxwait ) ) {
+                                      try {
+                                          nsOpenGLLayer = CGL.createNSOpenGLLayer(ctx, shaderProgram, pfmt, pbuffer, texID, isOpaque, width, height);
+                                          ols.attachSurfaceLayer(nsOpenGLLayer);
+                                          final int currentInterval = MacOSXCGLContext.this.getSwapInterval();
+                                          final int interval = 0 <= currentInterval ? currentInterval : 1;
+                                          setSwapIntervalImpl(nsOpenGLLayer, interval); // enabled per default in layered surface
+                                          valid = true;
+                                          if (DEBUG) {
+                                              System.err.println("NSOpenGLLayer.Attach: OK, layer "+toHexString(nsOpenGLLayer)+" w/ pbuffer "+toHexString(pbuffer)+", texID "+texID+", texSize "+lastWidth+"x"+lastHeight+", drawableHandle "+toHexString(drawable.getHandle())+" - "+getThreadName());
+                                          }
+                                      } finally {
+                                          MacOSXCGLContext.this.lock.unlock();
+                                      }
+                                  }
+                              } finally {
+                                  surfaceLock.unlock();
+                              }
+                          }
+                      } catch (InterruptedException e) {
+                          e.printStackTrace();
+                      }
+                      if( !valid ) {
+                          // could not acquire lock, re-queue
+                          if (DEBUG) {
+                              System.err.println("NSOpenGLLayer.Attach: Re-Queue, drawableHandle "+toHexString(drawable.getHandle())+" - "+getThreadName());
+                          }
+                          OSXUtil.RunLater(true /* onMain */, this, 1);
+                      }
+                  }
+              }
           }
+      }
+      AttachGLLayerCmd attachGLLayerCmd = null;
+
+      class DetachGLLayerCmd implements Runnable {
+        final AttachGLLayerCmd cmd;
+
+        DetachGLLayerCmd(AttachGLLayerCmd cmd) {
+            this.cmd = cmd;
+        }
+
+        @Override
+        public final String toString() {
+            return "DetachGLLayerCmd["+cmd.contentToString()+"]";
+        }
+
+        @Override
+        public void run() {
+            synchronized( cmd ) {
+                if( cmd.valid ) {
+                    // still having a valid OLS attached to surface (parent OLS could have been removed)
+                    try {
+                        final OffscreenLayerSurface ols = cmd.ols;
+                        final long l = ols.getAttachedSurfaceLayer();
+                        if( 0 != l ) {
+                            ols.detachSurfaceLayer();
+                        }
+                    } catch(Throwable t) {
+                        System.err.println("Catched Exception on thread "+getThreadName());
+                        t.printStackTrace();
+                    }
+                    CGL.releaseNSOpenGLLayer(cmd.nsOpenGLLayer);
+                    if(DEBUG) {
+                        System.err.println("NSOpenGLLayer.Detach: OK, layer "+toHexString(cmd.nsOpenGLLayer)+" - "+getThreadName());
+                    }
+                    cmd.nsOpenGLLayer = 0;
+                    cmd.valid = false;
+                } else if(DEBUG) {
+                    System.err.println("NSOpenGLLayer.Detach: Skipped "+toHexString(cmd.nsOpenGLLayer)+" - "+getThreadName());
+                }
+            }
         }
-        return ctx;        
-    }
-    
-    public boolean destroy(long ctx) {
-      if(0 != nsOpenGLLayer) {
-          final NativeSurface surface = drawable.getNativeSurface();
-          if (DEBUG) {
-              System.err.println("NS destroy nsOpenGLLayer "+toHexString(nsOpenGLLayer));
-          }
-          final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
-          if(null == ols) {
-              throw new InternalError("XXX: "+ols);
-          }
-          CGL.releaseNSOpenGLLayer(nsOpenGLLayer);
-          ols.detachSurfaceLayer(nsOpenGLLayer);
-          CGL.deletePixelFormat(nsOpenGLLayerPFmt);
-          nsOpenGLLayerPFmt = 0;
-          nsOpenGLLayer = 0;
       }
-      return CGL.deleteContext(ctx, true);
-    }
 
-    public boolean copyImpl(long src, int mask) {
-        CGL.copyContext(contextHandle, src, mask);
-        return true;
-    }
-    
-    public boolean makeCurrent(long ctx) {
-      final long cglCtx = CGL.getCGLContext(ctx);
-      if(0 == cglCtx) {
-          throw new InternalError("Null CGLContext for: "+this);
+      @Override
+      public void associateDrawable(boolean bound) {
+          backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(drawable.getNativeSurface(), true);
+
+          if(DEBUG) {
+              System.err.println("MaxOSXCGLContext.NSOpenGLImpl.associateDrawable: "+bound+", ctx "+toHexString(contextHandle)+
+                                 ", hasBackingLayerHost "+(null!=backingLayerHost)+", attachGLLayerCmd "+attachGLLayerCmd);
+              // Thread.dumpStack();
+          }
+
+          if( bound ) {
+              if( null != backingLayerHost ) {
+                  final GLCapabilitiesImmutable chosenCaps;
+                  final long ctx;
+                  final int texID;
+                  final long pbufferHandle;
+                  final int gl3ShaderProgramName;
+
+                  //
+                  // handled layered surface
+                  //
+                  chosenCaps = drawable.getChosenGLCapabilities();
+                  ctx = MacOSXCGLContext.this.getHandle();
+                  final long drawableHandle = drawable.getHandle();
+                  if(drawable instanceof GLFBODrawableImpl) {
+                      final GLFBODrawableImpl fbod = (GLFBODrawableImpl)drawable;
+                      texID = fbod.getTextureBuffer(GL.GL_FRONT).getName();
+                      pbufferHandle = 0;
+                      fbod.setSwapBufferContext(new GLFBODrawableImpl.SwapBufferContext() {
+                          @Override
+                          public void swapBuffers(boolean doubleBuffered) {
+                              MacOSXCGLContext.NSOpenGLImpl.this.swapBuffers();
+                          } } ) ;
+                  } else if( CGL.isNSOpenGLPixelBuffer(drawableHandle) ) {
+                      texID = 0;
+                      pbufferHandle = drawableHandle;
+                      if(0 != drawableHandle) { // complete 'validatePBufferConfig(..)' procedure
+                          CGL.setContextPBuffer(ctx, pbufferHandle);
+                          needsSetContextPBuffer = false;
+                      }
+                  } else {
+                      throw new GLException("BackingLayerHost w/ unknown handle (!FBO, !PBuffer): "+drawable);
+                  }
+                  lastWidth = drawable.getWidth();
+                  lastHeight = drawable.getHeight();
+                  if(0>=lastWidth || 0>=lastHeight || !drawable.isRealized()) {
+                      throw new GLException("Drawable not realized yet or invalid texture size, texSize "+lastWidth+"x"+lastHeight+", "+drawable);
+                  }
+                  if( MacOSXCGLContext.this.isGL3core() ) {
+                      if( null == gl3ShaderProgram) {
+                          gl3ShaderProgram = createCALayerShader(MacOSXCGLContext.this.gl.getGL3ES3());
+                      }
+                      gl3ShaderProgramName = gl3ShaderProgram.program();
+                  } else {
+                      gl3ShaderProgramName = 0;
+                  }
+
+                  // All CALayer lifecycle ops are deferred on main-thread
+                  attachGLLayerCmd = new AttachGLLayerCmd(
+                          backingLayerHost, ctx, gl3ShaderProgramName, pixelFormat, pbufferHandle, texID,
+                          chosenCaps.isBackgroundOpaque(), lastWidth, lastHeight );
+                  if(DEBUG) {
+                      System.err.println("MaxOSXCGLContext.NSOpenGLImpl.associateDrawable(true): "+attachGLLayerCmd);
+                  }
+                  OSXUtil.RunOnMainThread(false, attachGLLayerCmd);
+              } else { // -> null == backingLayerHost
+                  lastWidth = drawable.getWidth();
+                  lastHeight = drawable.getHeight();
+                  boolean[] isPBuffer = { false };
+                  boolean[] isFBO = { false };
+                  CGL.setContextView(contextHandle, getNSViewHandle(isPBuffer, isFBO));
+              }
+          } else { // -> !bound
+              if( null != backingLayerHost ) {
+                  final AttachGLLayerCmd cmd = attachGLLayerCmd;
+                  attachGLLayerCmd = null;
+                  if( null == cmd ) {
+                      throw new GLException("Null attachGLLayerCmd: "+drawable);
+                  }
+                  if( 0 != cmd.pbuffer ) {
+                      CGL.setContextPBuffer(contextHandle, 0);
+                  }
+                  synchronized(cmd) {
+                      if( !cmd.valid ) {
+                          cmd.valid = true; // skip pending creation
+                      } else {
+                          // All CALayer lifecycle ops are deferred on main-thread
+                          final DetachGLLayerCmd dCmd = new DetachGLLayerCmd(cmd);
+                          if(DEBUG) {
+                              System.err.println("MaxOSXCGLContext.NSOpenGLImpl.associateDrawable(false): "+dCmd);
+                          }
+                          OSXUtil.RunOnMainThread(false, dCmd);
+                          if( null != gl3ShaderProgram ) {
+                              gl3ShaderProgram.destroy(MacOSXCGLContext.this.gl.getGL3());
+                              gl3ShaderProgram = null;
+                          }
+                      }
+                  }
+              }
+              CGL.clearDrawable(contextHandle);
+              backingLayerHost = null;
+          }
       }
-      int err = CGL.CGLLockContext(cglCtx);
-      if(CGL.kCGLNoError == err) {
-          return CGL.makeCurrentContext(ctx);
-      } else if(DEBUG) {
-          System.err.println("NSGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
+
+      private final void validatePBufferConfig(long ctx) {
+          final long drawableHandle = drawable.getHandle();
+          if( needsSetContextPBuffer && 0 != drawableHandle && CGL.isNSOpenGLPixelBuffer(drawableHandle) ) {
+              // Must associate the pbuffer with our newly-created context
+              needsSetContextPBuffer = false;
+              CGL.setContextPBuffer(ctx, drawableHandle);
+              if(DEBUG) {
+                  System.err.println("NS.validateDrawableConfig bind pbuffer "+toHexString(drawableHandle)+" -> ctx "+toHexString(ctx));
+              }
+          }
       }
-      return false;
-    }
 
-    public boolean release(long ctx) {
-      try {
-          gl.glFlush(); // w/o glFlush()/glFinish() OSX < 10.7 (NVidia driver) may freeze
-      } catch (GLException gle) {
-          if(DEBUG) {
-            System.err.println("MacOSXCGLContext.NSOpenGLImpl.release: INFO: glFlush() catched exception:");
-            gle.printStackTrace();              
+      /** Returns true if size has been updated, otherwise false (same size). */
+      private final boolean validateDrawableSizeConfig(long ctx) {
+          final int width = drawable.getWidth();
+          final int height = drawable.getHeight();
+          if( lastWidth != width || lastHeight != height ) {
+              lastWidth = drawable.getWidth();
+              lastHeight = drawable.getHeight();
+              if(DEBUG) {
+                  System.err.println("NS.validateDrawableConfig size changed");
+              }
+              return true;
           }
+          return false;
       }
-      final boolean res = CGL.clearCurrentContext(ctx);
-      final long cglCtx = CGL.getCGLContext(ctx);
-      if(0 == cglCtx) {
-          throw new InternalError("Null CGLContext for: "+this);
+
+      @Override
+      public boolean copyImpl(long src, int mask) {
+          CGL.copyContext(contextHandle, src, mask);
+          return true;
       }
-      final int err = CGL.CGLUnlockContext(cglCtx);
-      if(DEBUG && CGL.kCGLNoError != err) {
-          System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err)+": "+this);
-      }      
-      return res && CGL.kCGLNoError == err;
-    }
 
-    public boolean setSwapInterval(int interval) {
-      if(0 != nsOpenGLLayer) {
-        CGL.setNSOpenGLLayerSwapInterval(nsOpenGLLayer, interval);
-        vsyncTimeout = interval * (int)screenVSyncTimeout;
-        if(DEBUG) { System.err.println("NS setSwapInterval: "+vsyncTimeout+" micros"); }
+      @Override
+      public boolean makeCurrent(long ctx) {
+          final long cglCtx = CGL.getCGLContext(ctx);
+          if(0 == cglCtx) {
+              throw new InternalError("Null CGLContext for: "+this);
+          }
+          final int err = CGL.CGLLockContext(cglCtx);
+          if(CGL.kCGLNoError == err) {
+              validatePBufferConfig(ctx); // required to handle pbuffer change ASAP
+              return CGL.makeCurrentContext(ctx);
+          } else if(DEBUG) {
+              System.err.println("NSGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
+          }
+          return false;
       }
-      CGL.setSwapInterval(contextHandle, interval);
-      return true;
-    }
-    
-    public boolean swapBuffers() {
-      if( 0 != nsOpenGLLayer ) {
-        // If v-sync is disabled, frames will be drawn as quickly as possible 
-        // w/o delay but in sync w/ CALayer. Otherwise wait until next swap interval (v-sync).        
-        CGL.waitUntilNSOpenGLLayerIsReady(nsOpenGLLayer, vsyncTimeout);
+
+      @Override
+      public boolean release(long ctx) {
+          try {
+              if( hasRendererQuirk(GLRendererQuirks.GLFlushBeforeRelease) && null != MacOSXCGLContext.this.getGLProcAddressTable() ) {
+                  gl.glFlush();
+              }
+          } catch (GLException gle) {
+              if(DEBUG) {
+                  System.err.println("MacOSXCGLContext.NSOpenGLImpl.release: INFO: glFlush() catched exception:");
+                  gle.printStackTrace();
+              }
+          }
+          final boolean res = CGL.clearCurrentContext(ctx);
+          final long cglCtx = CGL.getCGLContext(ctx);
+          if(0 == cglCtx) {
+              throw new InternalError("Null CGLContext for: "+this);
+          }
+          final int err = CGL.CGLUnlockContext(cglCtx);
+          if(DEBUG && CGL.kCGLNoError != err) {
+              System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err)+": "+this);
+          }
+          return res && CGL.kCGLNoError == err;
+      }
+
+      @Override
+      public boolean detachPBuffer() {
+          needsSetContextPBuffer = true;
+          // CGL.setContextPBuffer(contextHandle, 0); // doesn't work, i.e. not taking nil
+          return true;
       }
-      if(CGL.flushBuffer(contextHandle)) {
-          if(0 != nsOpenGLLayer) {
-              // trigger CALayer to update
-              CGL.setNSOpenGLLayerNeedsDisplay(nsOpenGLLayer);
+
+      @Override
+      public boolean setSwapInterval(int interval) {
+          final AttachGLLayerCmd cmd = attachGLLayerCmd;
+          if(null != cmd) {
+              synchronized(cmd) {
+                  if( cmd.valid && 0 != cmd.nsOpenGLLayer) {
+                      setSwapIntervalImpl(cmd.nsOpenGLLayer, interval);
+                      return true;
+                  }
+              }
           }
+          setSwapIntervalImpl(0, interval);
           return true;
       }
-      return false;
-    }
+
+      private void setSwapIntervalImpl(final long l, int interval) {
+          if( 0 != l ) {
+              CGL.setNSOpenGLLayerSwapInterval(l, interval);
+              if( 0 < interval ) {
+                  vsyncTimeout = interval * screenVSyncTimeout + 1000; // +1ms
+              } else {
+                  vsyncTimeout = 1 * screenVSyncTimeout + 1000; // +1ms
+              }
+              if(DEBUG) { System.err.println("NS setSwapInterval: "+interval+" -> "+vsyncTimeout+" micros"); }
+          }
+          if(DEBUG) { System.err.println("CGL setSwapInterval: "+interval); }
+          CGL.setSwapInterval(contextHandle, interval);
+      }
+
+      private int skipSync=0;
+      /** TODO: Remove after discussion
+      private boolean perfIterReset = false;
+      private int perfIter = 0;
+      private long waitGLS = 0;
+      private long finishGLS = 0;
+      private long frameXS = 0;
+      private long lastFrameStart = 0;
+      */
+
+      @Override
+      public boolean swapBuffers() {
+          final AttachGLLayerCmd cmd = attachGLLayerCmd;
+          if(null != cmd) {
+              synchronized(cmd) {
+                  if( cmd.valid && 0 != cmd.nsOpenGLLayer) {
+                      if( validateDrawableSizeConfig(contextHandle) ) {
+                          // skip wait-for-vsync for a few frames if size has changed,
+                          // allowing to update the texture IDs ASAP.
+                          skipSync = 10;
+                      }
+
+                      final boolean res;
+                      final int texID;
+                      final boolean valid;
+                      final boolean isFBO = drawable instanceof GLFBODrawableImpl;
+                      if( isFBO ){
+                          texID = ((GLFBODrawableImpl)drawable).getTextureBuffer(GL.GL_FRONT).getName();
+                          valid = 0 != texID;
+                      } else {
+                          texID = 0;
+                          valid = 0 != drawable.getHandle();
+                      }
+                      if(valid) {
+                          res = CGL.flushBuffer(contextHandle);
+                          if(res) {
+                              if(0 == skipSync) {
+                                  /** TODO: Remove after discussion
+                                  perfIter++;
+                                  if( !perfIterReset && 100 == perfIter ) {
+                                      perfIterReset = true;
+                                      perfIter = 1;
+                                      waitGLS = 0;
+                                      finishGLS = 0;
+                                      frameXS = 0;
+                                  }
+                                  final long lastFramePeriod0 = TimeUnit.NANOSECONDS.toMicros(System.nanoTime()) - lastFrameStart;
+                                  gl.glFinish(); // Require to finish previous GL rendering to give CALayer proper result
+                                  final long lastFramePeriod1 = TimeUnit.NANOSECONDS.toMicros(System.nanoTime()) - lastFrameStart;
+
+                                  // If v-sync is disabled, frames will be drawn as quickly as possible w/o delay,
+                                  // while still synchronizing w/ CALayer.
+                                  // If v-sync is enabled wait until next swap interval (v-sync).
+                                  CGL.waitUntilNSOpenGLLayerIsReady(cmd.nsOpenGLLayer, vsyncTimeout);
+                                  final long lastFramePeriodX = TimeUnit.NANOSECONDS.toMicros(System.nanoTime()) - lastFrameStart;
+
+                                  final long finishGL = lastFramePeriod1 - lastFramePeriod0;
+                                  final long waitGL = lastFramePeriodX - lastFramePeriod1;
+                                  finishGLS += finishGL;
+                                  waitGLS += waitGL;
+                                  frameXS += lastFramePeriodX;
+
+                                  System.err.println("XXX["+perfIter+"] TO "+vsyncTimeout/1000+" ms, "+
+                                                     "lFrame0 "+lastFramePeriod0/1000+" ms, "+
+                                                     "lFrameX "+lastFramePeriodX/1000+" / "+frameXS/1000+" ~"+(frameXS/perfIter)/1000.0+" ms, "+
+                                                     "finishGL "+finishGL/1000+" / "+finishGLS/1000+" ~"+(finishGLS/perfIter)/1000.0+" ms, "+
+                                                     "waitGL "+waitGL/1000+" / "+waitGLS/1000+" ~"+(waitGLS/perfIter)/1000.0+" ms");
+                                  */
+                                  //
+                                  // Required(?) to finish previous GL rendering to give CALayer proper result,
+                                  // i.e. synchronize both threads each w/ their GLContext sharing same resources.
+                                  //
+                                  // FIXME: IMHO this synchronization should be implicitly performed via 'CGL.flushBuffer(contextHandle)' above,
+                                  // in case this will be determined a driver bug - use a QUIRK entry in GLRendererQuirks!
+                                  gl.glFinish();
+
+                                  // If v-sync is disabled, frames will be drawn as quickly as possible w/o delay,
+                                  // while still synchronizing w/ CALayer.
+                                  // If v-sync is enabled wait until next swap interval (v-sync).
+                                  CGL.waitUntilNSOpenGLLayerIsReady(cmd.nsOpenGLLayer, vsyncTimeout);
+                              } else {
+                                  skipSync--;
+                              }
+                              if(isFBO) {
+                                  // trigger CALayer to update incl. possible surface change (texture)
+                                  CGL.setNSOpenGLLayerNeedsDisplayFBO(cmd.nsOpenGLLayer, texID);
+                              } else {
+                                  // trigger CALayer to update incl. possible surface change (new pbuffer handle)
+                                  CGL.setNSOpenGLLayerNeedsDisplayPBuffer(cmd.nsOpenGLLayer, drawable.getHandle());
+                              }
+                              // lastFrameStart = TimeUnit.NANOSECONDS.toMicros(System.nanoTime());
+                          }
+                      } else {
+                          res = true;
+                      }
+                      return res;
+                  }
+              }
+          }
+          return CGL.flushBuffer(contextHandle);
+      }
+
   }
 
   class CGLImpl implements GLBackendImpl {
-    public boolean isNSContext() { return false; }
-    
-    public long create(long share, int ctp, int major, int minor) {
-      long ctx = 0;
-      MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
-      GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
-      long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2CGLPixelFormat(chosenCaps, ctp, major, minor);
-      if (pixelFormat == 0) {
-        throw new GLException("Unable to allocate pixel format with requested GLCapabilities");
-      }
-      config.setChosenPixelFormat(pixelFormat);
-      try {      
-          // Create new context
-          PointerBuffer ctxPB = PointerBuffer.allocateDirect(1);
-          if (DEBUG) {
-            System.err.println("Share context for CGL-based pbuffer context is " + toHexString(share));
-          }
-          int res = CGL.CGLCreateContext(pixelFormat, share, ctxPB);
-          if (res != CGL.kCGLNoError) {
-            throw new GLException("Error code " + res + " while creating context");
+      @Override
+      public boolean isNSContext() { return false; }
+
+      @Override
+      public long create(long share, int ctp, int major, int minor) {
+          long ctx = 0;
+          final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
+          final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
+          final long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2CGLPixelFormat(config.getScreen().getDevice(),
+                                                                      chosenCaps, ctp, major, minor);
+          if (pixelFormat == 0) {
+              throw new GLException("Unable to allocate pixel format with requested GLCapabilities");
           }
-          if(chosenCaps.isPBuffer()) {
-              // Attach newly-created context to the pbuffer
-              res = CGL.CGLSetPBuffer(ctxPB.get(0), drawable.getHandle(), 0, 0, 0);
+          try {
+              // Create new context
+              PointerBuffer ctxPB = PointerBuffer.allocateDirect(1);
+              if (DEBUG) {
+                  System.err.println("Share context for CGL-based pbuffer context is " + toHexString(share));
+              }
+              int res = CGL.CGLCreateContext(pixelFormat, share, ctxPB);
               if (res != CGL.kCGLNoError) {
-                throw new GLException("Error code " + res + " while attaching context to pbuffer");
+                  throw new GLException("Error code " + res + " while creating context");
               }
+              ctx = ctxPB.get(0);
+
+              if (0 != ctx) {
+                  GLCapabilities fixedCaps = MacOSXCGLGraphicsConfiguration.CGLPixelFormat2GLCapabilities(pixelFormat);
+                  fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(fixedCaps, chosenCaps.isBackgroundOpaque());
+                  { // determine on-/offscreen caps, since pformat is ambiguous
+                      fixedCaps.setFBO( false );         // n/a for CGLImpl
+                      fixedCaps.setPBuffer( fixedCaps.isPBuffer() && !chosenCaps.isOnscreen() );
+                      fixedCaps.setBitmap( false );      // n/a in our OSX impl.
+                      fixedCaps.setOnscreen( !fixedCaps.isPBuffer() );
+                  }
+                  config.setChosenCapabilities(fixedCaps);
+                  if(DEBUG) {
+                      System.err.println("CGL create fixedCaps: "+fixedCaps);
+                  }
+                  if(fixedCaps.isPBuffer()) {
+                      // Must now associate the pbuffer with our newly-created context
+                      res = CGL.CGLSetPBuffer(ctx, drawable.getHandle(), 0, 0, 0);
+                      if (res != CGL.kCGLNoError) {
+                          throw new GLException("Error code " + res + " while attaching context to pbuffer");
+                      }
+                  }
+              }
+          } finally {
+              CGL.CGLDestroyPixelFormat(pixelFormat);
           }
-          ctx = ctxPB.get(0);
-          if(0!=ctx) {
-              if(DEBUG) {
-                  GLCapabilitiesImmutable caps0 = MacOSXCGLGraphicsConfiguration.CGLPixelFormat2GLCapabilities(pixelFormat);
-                  System.err.println("NS created: "+caps0);
-              }              
-          }
-      } finally {
-          CGL.CGLDestroyPixelFormat(pixelFormat);          
+          return ctx;
       }
-      return ctx;
-    }
-    
-    public boolean destroy(long ctx) {
-      return CGL.CGLDestroyContext(ctx) == CGL.kCGLNoError;
-    }
 
-    public boolean copyImpl(long src, int mask) {
-        CGL.CGLCopyContext(src, contextHandle, mask);
-        return true;
-    }
-    
-    public boolean makeCurrent(long ctx) {
-      int err = CGL.CGLLockContext(ctx);
-      if(CGL.kCGLNoError == err) {
-          err = CGL.CGLSetCurrentContext(ctx);
+      @Override
+      public boolean destroy(long ctx) {
+          return CGL.CGLDestroyContext(ctx) == CGL.kCGLNoError;
+      }
+
+      @Override
+      public void associateDrawable(boolean bound) {
+      }
+
+      @Override
+      public boolean copyImpl(long src, int mask) {
+          CGL.CGLCopyContext(src, contextHandle, mask);
+          return true;
+      }
+
+      @Override
+      public boolean makeCurrent(long ctx) {
+          int err = CGL.CGLLockContext(ctx);
           if(CGL.kCGLNoError == err) {
-              return true;
+              err = CGL.CGLSetCurrentContext(ctx);
+              if(CGL.kCGLNoError == err) {
+                  return true;
+              } else if(DEBUG) {
+                  System.err.println("CGL: Could not make context current: err 0x"+Integer.toHexString(err)+": "+this);
+              }
           } else if(DEBUG) {
-              System.err.println("CGL: Could not make context current: err 0x"+Integer.toHexString(err)+": "+this);
+              System.err.println("CGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
           }
-      } else if(DEBUG) {
-          System.err.println("CGL: Could not lock context: err 0x"+Integer.toHexString(err)+": "+this);
+          return false;
       }
-      return false;
-    }
 
-    public boolean release(long ctx) {
-      try {
-          gl.glFlush(); // w/o glFlush()/glFinish() OSX < 10.7 (NVidia driver) may freeze
-      } catch (GLException gle) {
-          if(DEBUG) {
-            System.err.println("MacOSXCGLContext.CGLImpl.release: INFO: glFlush() catched exception:");
-            gle.printStackTrace();              
+      @Override
+      public boolean release(long ctx) {
+          try {
+              if( hasRendererQuirk(GLRendererQuirks.GLFlushBeforeRelease) && null != MacOSXCGLContext.this.getGLProcAddressTable() ) {
+                  gl.glFlush();
+              }
+          } catch (GLException gle) {
+              if(DEBUG) {
+                  System.err.println("MacOSXCGLContext.CGLImpl.release: INFO: glFlush() catched exception:");
+                  gle.printStackTrace();
+              }
           }
+          int err = CGL.CGLSetCurrentContext(0);
+          if(DEBUG && CGL.kCGLNoError != err) {
+              System.err.println("CGL: Could not release current context: err 0x"+Integer.toHexString(err)+": "+this);
+          }
+          int err2 = CGL.CGLUnlockContext(ctx);
+          if(DEBUG && CGL.kCGLNoError != err2) {
+              System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err2)+": "+this);
+          }
+          return CGL.kCGLNoError == err && CGL.kCGLNoError == err2;
       }
-      int err = CGL.CGLSetCurrentContext(0);
-      if(DEBUG && CGL.kCGLNoError != err) {
-          System.err.println("CGL: Could not release current context: err 0x"+Integer.toHexString(err)+": "+this);
+
+      @Override
+      public boolean detachPBuffer() {
+          /* Doesn't work, i.e. not taking NULL
+          final int res = CGL.CGLSetPBuffer(contextHandle, 0, 0, 0, 0);
+          if (res != CGL.kCGLNoError) {
+              throw new GLException("Error code " + res + " while detaching context from pbuffer");
+          } */
+          return true;
       }
-      int err2 = CGL.CGLUnlockContext(ctx);
-      if(DEBUG && CGL.kCGLNoError != err2) {
-          System.err.println("CGL: Could not unlock context: err 0x"+Integer.toHexString(err2)+": "+this);
+
+      @Override
+      public boolean setSwapInterval(int interval) {
+          final IntBuffer lval = Buffers.newDirectIntBuffer(1);
+          lval.put(0, interval);
+          CGL.CGLSetParameter(contextHandle, CGL.kCGLCPSwapInterval, lval);
+          return true;
       }
-      return CGL.kCGLNoError == err && CGL.kCGLNoError == err2;
-    }
-    
-    public boolean setSwapInterval(int interval) {
-        int[] lval = new int[] { interval } ;
-        CGL.CGLSetParameter(contextHandle, CGL.kCGLCPSwapInterval, lval, 0);
-        return true;
-    }    
-    public boolean swapBuffers() {
-        return CGL.kCGLNoError == CGL.CGLFlushDrawable(contextHandle);
-    }    
-  }  
+      @Override
+      public boolean swapBuffers() {
+          return CGL.kCGLNoError == CGL.CGLFlushDrawable(contextHandle);
+      }
+  }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
index 7b5efc31a..448e3e221 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -42,10 +42,10 @@ package jogamp.opengl.macosx.cgl;
 
 import java.lang.ref.WeakReference;
 import java.util.ArrayList;
-import java.util.Iterator;
 import java.util.List;
 
 import javax.media.nativewindow.NativeSurface;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 
@@ -82,62 +82,75 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
   // lifetime of a given GLPbuffer. This is not a fully general
   // solution (for example, you can't share textures among a
   // GLPbuffer, a GLJPanel and a GLCanvas simultaneously) but should
-  // be enough to get things off the ground.  
+  // be enough to get things off the ground.
   public enum GLBackendType {
-    NSOPENGL(0), CGL(1); 
-    
+    /** Default OpenGL Backend */
+    NSOPENGL(0),
+    /** Alternative OpenGL Backend, only used for external context! */
+    CGL(1);
+
     public final int id;
 
     GLBackendType(int id){
         this.id = id;
     }
   }
-  private List<WeakReference<MacOSXCGLContext>> createdContexts = new ArrayList<WeakReference<MacOSXCGLContext>>();
-  
+  /* pp */ List<WeakReference<MacOSXCGLContext>> createdContexts = new ArrayList<WeakReference<MacOSXCGLContext>>();
+
   private boolean haveSetOpenGLMode = false;
   private GLBackendType openGLMode = GLBackendType.NSOPENGL;
-  
+
   public MacOSXCGLDrawable(GLDrawableFactory factory, NativeSurface comp, boolean realized) {
     super(factory, comp, realized);
     initOpenGLImpl(getOpenGLMode());
   }
-  
+
+  @Override
   protected void setRealizedImpl() {
   }
 
-  protected long getNSViewHandle() {
-      return GLBackendType.NSOPENGL == openGLMode ? getHandle() : 0;
-  }
-  
-  protected void registerContext(MacOSXCGLContext ctx) {
+  @Override
+  protected void associateContext(GLContext ctx, boolean bound) {
     // NOTE: we need to keep track of the created contexts in order to
     // implement swapBuffers() because of how Mac OS X implements its
     // OpenGL window interface
     synchronized (createdContexts) {
-      createdContexts.add(new WeakReference<MacOSXCGLContext>(ctx));
+        if(bound) {
+            final MacOSXCGLContext osxCtx = (MacOSXCGLContext)ctx;
+            createdContexts.add(new WeakReference<MacOSXCGLContext>(osxCtx));
+        } else {
+            for(int i=0; i<createdContexts.size(); ) {
+                final MacOSXCGLContext _ctx = createdContexts.get(i).get();
+                if( _ctx == null || _ctx == ctx) {
+                    createdContexts.remove(i);
+                } else {
+                    i++;
+                }
+            }
+        }
     }
   }
-  protected final void swapBuffersImpl() {
-    // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
-    synchronized (createdContexts) {
-        for (Iterator<WeakReference<MacOSXCGLContext>> iter = createdContexts.iterator(); iter.hasNext(); ) {
-          WeakReference<MacOSXCGLContext> ref = iter.next();
-          MacOSXCGLContext ctx = ref.get();
-          if (ctx != null) {
-            ctx.swapBuffers();
-          } else {
-            iter.remove();
-          }
+
+  @Override
+  protected final void swapBuffersImpl(boolean doubleBuffered) {
+    if(doubleBuffered) {
+        synchronized (createdContexts) {
+            for(int i=0; i<createdContexts.size(); ) {
+                final MacOSXCGLContext ctx = createdContexts.get(i).get();
+                if (ctx != null) {
+                    ctx.swapBuffers();
+                    i++;
+                } else {
+                    createdContexts.remove(i);
+                }
+            }
         }
     }
-  }  
-    
-  public GLDynamicLookupHelper getGLDynamicLookupHelper() {
-    return getFactoryImpl().getGLDynamicLookupHelper(0);
   }
 
-  protected static String getThreadName() {
-    return Thread.currentThread().getName();
+  @Override
+  public GLDynamicLookupHelper getGLDynamicLookupHelper() {
+    return getFactoryImpl().getGLDynamicLookupHelper(0);
   }
 
   // Support for "mode switching" as described in MacOSXCGLDrawable
@@ -148,17 +161,16 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
       if (haveSetOpenGLMode) {
         throw new GLException("Can't switch between using NSOpenGLPixelBuffer and CGLPBufferObj more than once");
       }
-    
-      destroyImpl();
+      setRealized(false);
       if (DEBUG) {
         System.err.println("MacOSXCGLDrawable: Switching context mode " + openGLMode + " -> " + mode);
       }
       initOpenGLImpl(mode);
       openGLMode = mode;
-      haveSetOpenGLMode = true;      
+      haveSetOpenGLMode = true;
   }
   public final GLBackendType getOpenGLMode() { return openGLMode; }
 
   protected void initOpenGLImpl(GLBackendType backend) { /* nop */ }
-  
+
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
index 71c0d5539..9ce71cfe9 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -41,17 +41,17 @@
 package jogamp.opengl.macosx.cgl;
 
 import java.nio.Buffer;
+import java.nio.FloatBuffer;
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 
-import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.DefaultGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.UpstreamSurfaceHook;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
@@ -60,21 +60,27 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
-import javax.media.opengl.GLProfile.ShutdownType;
 
+import jogamp.nativewindow.WrappedSurface;
+import jogamp.nativewindow.macosx.OSXDummyUpstreamSurfaceHook;
 import jogamp.opengl.DesktopGLDynamicLookupHelper;
+import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+import jogamp.opengl.SharedResourceRunner;
 
-import com.jogamp.common.JogampRuntimeException;
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.util.ReflectionUtil;
-import com.jogamp.nativewindow.WrappedSurface;
+import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 import com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice;
+import com.jogamp.opengl.GLExtensions;
+import com.jogamp.opengl.GLRendererQuirks;
 
 public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   private static DesktopGLDynamicLookupHelper macOSXCGLDynamicLookupHelper = null;
-  
+
   public MacOSXCGLDrawableFactory() {
     super();
 
@@ -90,31 +96,40 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
             }
             if(null!=tmp && tmp.isLibComplete()) {
                 macOSXCGLDynamicLookupHelper = tmp;
-                /** FIXME ?? 
+                /** FIXME ??
                 CGL.getCGLProcAddressTable().reset(macOSXCGLDynamicLookupHelper);
                 */
             }
         }
     }
-    
+
     defaultDevice = new MacOSXGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
-    
+
     if(null!=macOSXCGLDynamicLookupHelper) {
         // Register our GraphicsConfigurationFactory implementations
         // The act of constructing them causes them to be registered
         MacOSXCGLGraphicsConfigurationFactory.registerFactory();
         if(GLProfile.isAWTAvailable()) {
             try {
-              ReflectionUtil.callStaticMethod("jogamp.opengl.macosx.cgl.awt.MacOSXAWTCGLGraphicsConfigurationFactory", 
-                                              "registerFactory", null, null, getClass().getClassLoader());                
-            } catch (JogampRuntimeException jre) { /* n/a .. */ }
+              ReflectionUtil.callStaticMethod("jogamp.opengl.macosx.cgl.awt.MacOSXAWTCGLGraphicsConfigurationFactory",
+                                              "registerFactory", null, null, getClass().getClassLoader());
+            } catch (Exception jre) { /* n/a .. */ }
         }
-    
+
         sharedMap = new HashMap<String, SharedResource>();
-    }     
+    }
+  }
+
+  @Override
+  protected final boolean isComplete() {
+      return null != macOSXCGLDynamicLookupHelper;
   }
 
-  protected final void destroy(ShutdownType shutdownType) {
+  @Override
+  protected final void shutdownImpl() {
+    if( DEBUG ) {
+        System.err.println("MacOSXCGLDrawableFactory.shutdown");
+    }
     if(null != sharedMap) {
         sharedMap.clear();
         sharedMap = null;
@@ -122,13 +137,13 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     defaultDevice = null;
     /**
      * Pulling away the native library may cause havoc ..
-     * 
-    if(ShutdownType.COMPLETE == shutdownType && null != macOSXCGLDynamicLookupHelper) {
-        macOSXCGLDynamicLookupHelper.destroy();
-        macOSXCGLDynamicLookupHelper = null;
-    } */
+     *
+      macOSXCGLDynamicLookupHelper.destroy();
+     */
+    macOSXCGLDynamicLookupHelper = null;
   }
 
+  @Override
   public GLDynamicLookupHelper getGLDynamicLookupHelper(int profile) {
       return macOSXCGLDynamicLookupHelper;
   }
@@ -136,37 +151,62 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   private HashMap<String, SharedResource> sharedMap = new HashMap<String, SharedResource>();
   private MacOSXGraphicsDevice defaultDevice;
 
-  static class SharedResource {
+  static class SharedResource implements SharedResourceRunner.Resource {
       // private MacOSXCGLDrawable drawable;
       // private MacOSXCGLContext context;
+      private final GLRendererQuirks glRendererQuirks;
       MacOSXGraphicsDevice device;
-      boolean wasContextCreated;
+      boolean valid;
       boolean hasNPOTTextures;
       boolean hasRECTTextures;
       boolean hasAppleFloatPixels;
 
-      SharedResource(MacOSXGraphicsDevice device, boolean wasContextCreated, 
+      SharedResource(MacOSXGraphicsDevice device, boolean valid,
                      boolean hasNPOTTextures, boolean hasRECTTextures, boolean hasAppletFloatPixels
-                     /* MacOSXCGLDrawable draw, MacOSXCGLContext ctx */) {
+                     /* MacOSXCGLDrawable draw, MacOSXCGLContext ctx */, GLRendererQuirks glRendererQuirks) {
           // drawable = draw;
-          // context = ctx;
+          // this.context = ctx;
+          this.glRendererQuirks = glRendererQuirks;
           this.device = device;
-          this.wasContextCreated = wasContextCreated;
+          this.valid = valid;
           this.hasNPOTTextures = hasNPOTTextures;
           this.hasRECTTextures = hasRECTTextures;
           this.hasAppleFloatPixels = hasAppletFloatPixels;
       }
-      final MacOSXGraphicsDevice getDevice() { return device; }
-      final boolean wasContextAvailable() { return wasContextCreated; }
+      @Override
+      public final boolean isValid() {
+          return valid;
+      }
+      @Override
+      public final MacOSXGraphicsDevice getDevice() { return device; }
+      // final MacOSXCGLContext getContext() { return context; }
       final boolean isNPOTTextureAvailable() { return hasNPOTTextures; }
       final boolean isRECTTextureAvailable() { return hasRECTTextures; }
       final boolean isAppleFloatPixelsAvailable() { return hasAppleFloatPixels; }
+      @Override
+      public final AbstractGraphicsScreen getScreen() {
+          return null;
+      }
+      @Override
+      public final GLDrawableImpl getDrawable() {
+          return null;
+      }
+      @Override
+      public GLContextImpl getContext() {
+          return null;
+      }
+      @Override
+      public GLRendererQuirks getRendererQuirks() {
+          return glRendererQuirks;
+      }
   }
 
+  @Override
   public final AbstractGraphicsDevice getDefaultDevice() {
       return defaultDevice;
   }
 
+  @Override
   public final boolean getIsDeviceCompatible(AbstractGraphicsDevice device) {
       if(null!=macOSXCGLDynamicLookupHelper && device instanceof MacOSXGraphicsDevice) {
           return true;
@@ -174,7 +214,7 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
       return false;
   }
 
-  private HashSet<String> devicesTried = new HashSet<String>();
+  private final HashSet<String> devicesTried = new HashSet<String>();
 
   private boolean getDeviceTried(String connection) {
       synchronized (devicesTried) {
@@ -191,8 +231,9 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
           devicesTried.remove(connection);
       }
   }
-  
-  /* package */ SharedResource getOrCreateOSXSharedResource(AbstractGraphicsDevice adevice) {
+
+  @Override
+  protected final SharedResource getOrCreateSharedResourceImpl(AbstractGraphicsDevice adevice) {
     final String connection = adevice.getConnection();
     SharedResource sr;
     synchronized(sharedMap) {
@@ -201,7 +242,8 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     if(null==sr && !getDeviceTried(connection)) {
         addDeviceTried(connection);
         final MacOSXGraphicsDevice sharedDevice = new MacOSXGraphicsDevice(adevice.getUnitID());
-        boolean madeCurrent = false;
+        GLRendererQuirks glRendererQuirks = null;
+        boolean isValid = false;
         boolean hasNPOTTextures = false;
         boolean hasRECTTextures = false;
         boolean hasAppleFloatPixels = false;
@@ -209,96 +251,68 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
             GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
             if (null == glp) {
                 throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
-            }    
-            final GLCapabilities caps = new GLCapabilities(glp);
-            caps.setRedBits(5); caps.setGreenBits(5); caps.setBlueBits(5); caps.setAlphaBits(0);
-            caps.setDepthBits(5);
-            caps.setDoubleBuffered(false);
-            caps.setOnscreen(false);
-            caps.setPBuffer(true);
-            final MacOSXCGLDrawable drawable = (MacOSXCGLDrawable) createGLDrawable( createOffscreenSurfaceImpl(sharedDevice, caps, caps, null, 64, 64) );        
-            if(null!=drawable) {
-                drawable.setRealized(true);
-                final GLContext context = drawable.createContext(null);
-                if (null != context) {
-                    try {
-                        context.makeCurrent(); // could cause exception
-                        madeCurrent = context.isCurrent();
-                        if(madeCurrent) {
-                            GL gl = context.getGL();
-                            hasNPOTTextures = gl.isNPOTTextureAvailable();
-                            hasRECTTextures = gl.isExtensionAvailable("GL_EXT_texture_rectangle");
-                            hasAppleFloatPixels = gl.isExtensionAvailable("GL_APPLE_float_pixels");
-                        }
-                    } catch (GLException gle) {
-                        if (DEBUG) {
-                            System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: makeCurrent catched exception:");
-                            gle.printStackTrace();
-                        }
-                    } finally {
-                        try {
-                            context.destroy();
-                        } catch (GLException gle) {
-                            if (DEBUG) {
-                                System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: destroy catched exception:");
-                                gle.printStackTrace();
-                            }                            
-                        }
+            }
+            final GLCapabilitiesImmutable caps = new GLCapabilities(glp);
+            final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, caps, caps, null, 64, 64));
+            sharedDrawable.setRealized(true);
+
+            final MacOSXCGLContext sharedContext = (MacOSXCGLContext) sharedDrawable.createContext(null);
+            if (null == sharedContext) {
+                throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
+            }
+
+            try {
+                sharedContext.makeCurrent(); // could cause exception
+                isValid = sharedContext.isCurrent();
+                if(isValid) {
+                    GL gl = sharedContext.getGL();
+                    hasNPOTTextures = gl.isNPOTTextureAvailable();
+                    hasRECTTextures = gl.isExtensionAvailable(GLExtensions.EXT_texture_rectangle);
+                    hasAppleFloatPixels = gl.isExtensionAvailable(GLExtensions.APPLE_float_pixels);
+                    glRendererQuirks = sharedContext.getRendererQuirks();
+                }
+            } catch (GLException gle) {
+                if (DEBUG) {
+                    System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: makeCurrent catched exception:");
+                    gle.printStackTrace();
+                }
+            } finally {
+                try {
+                    sharedContext.destroy();
+                } catch (GLException gle) {
+                    if (DEBUG) {
+                        System.err.println("MacOSXCGLDrawableFactory.createShared: INFO: destroy catched exception:");
+                        gle.printStackTrace();
                     }
                 }
-                drawable.destroy();
             }
+            sharedDrawable.setRealized(false);
         }
-        sr = new SharedResource(sharedDevice, madeCurrent, hasNPOTTextures, hasRECTTextures, hasAppleFloatPixels);
+        sr = new SharedResource(sharedDevice, isValid, hasNPOTTextures, hasRECTTextures, hasAppleFloatPixels, glRendererQuirks);
         synchronized(sharedMap) {
             sharedMap.put(connection, sr);
         }
         removeDeviceTried(connection);
         if (DEBUG) {
             System.err.println("MacOSXCGLDrawableFactory.createShared: device:  " + sharedDevice);
-            System.err.println("MacOSXCGLDrawableFactory.createShared: context: madeCurrent " + madeCurrent + ", NPOT "+hasNPOTTextures+
-                               ", RECT "+hasRECTTextures+", FloatPixels "+hasAppleFloatPixels);
-        }                        
+            System.err.println("MacOSXCGLDrawableFactory.createShared: context: madeCurrent " + isValid + ", NPOT "+hasNPOTTextures+
+                               ", RECT "+hasRECTTextures+", FloatPixels "+hasAppleFloatPixels+", "+glRendererQuirks);
+        }
     }
     return sr;
   }
-   
+
+  @Override
   protected final Thread getSharedResourceThread() {
     return null;
   }
-  
-  protected final boolean createSharedResource(AbstractGraphicsDevice device) {
-    try {
-        SharedResource sr = getOrCreateOSXSharedResource(device);
-        if(null!=sr) {
-            return sr.wasContextAvailable();
-        }
-    } catch (GLException gle) {
-        if(DEBUG) {
-            System.err.println("Catched Exception while MaxOSXCGL Shared Resource initialization:");
-            gle.printStackTrace();
-        }
-    }
-    return false;        
-  }
-  
-  protected final GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device) {
-      // FIXME: not implemented .. needs a dummy OSX surface
-      return null;
-  }
-
-  protected AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device) {
-      SharedResource sr = getOrCreateOSXSharedResource(device);
-      if(null!=sr) {
-          return sr.getDevice();
-      }
-      return null;
-  }
 
+  @Override
   protected List<GLCapabilitiesImmutable> getAvailableCapabilitiesImpl(AbstractGraphicsDevice device) {
       return MacOSXCGLGraphicsConfiguration.getAvailableCapabilities(this, device);
   }
 
+  @Override
   protected GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
@@ -306,54 +320,81 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     return new MacOSXOnscreenCGLDrawable(this, target);
   }
 
+  @Override
   protected GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
-    AbstractGraphicsConfiguration config = target.getGraphicsConfiguration();
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final MutableGraphicsConfiguration config = (MutableGraphicsConfiguration) target.getGraphicsConfiguration();
+    final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
     if(!caps.isPBuffer()) {
+        // Actual implementation is using PBuffer ...
+        final GLCapabilities modCaps = (GLCapabilities) caps.cloneMutable();
+        modCaps.setPBuffer(true);
+        modCaps.setBitmap(false);
+        config.setChosenCapabilities(modCaps);
         return new MacOSXOffscreenCGLDrawable(this, target);
     }
     return new MacOSXPbufferCGLDrawable(this, target);
   }
 
-  public boolean canCreateGLPbuffer(AbstractGraphicsDevice device) {
-    return true;
+  @Override
+  public boolean canCreateGLPbuffer(AbstractGraphicsDevice device, GLProfile glp) {
+    if( glp.isGL2() ) {
+        // OSX only supports pbuffer w/ compatible, non-core, context.
+        return true;
+    } else {
+        return false;
+    }
+  }
+
+  @Override
+  protected ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                  GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
+                                                  GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstreamHook) {
+    final MacOSXGraphicsDevice device;
+    if( createNewDevice || !(deviceReq instanceof MacOSXGraphicsDevice) ) {
+        device = new MacOSXGraphicsDevice(deviceReq.getUnitID());
+    } else {
+        device = (MacOSXGraphicsDevice)deviceReq;
+    }
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+    final MacOSXCGLGraphicsConfiguration config = MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, true);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen);
+    }
+    return new WrappedSurface(config, 0, upstreamHook, createNewDevice);
+  }
+
+  @Override
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice,
+                                                   GLCapabilitiesImmutable chosenCaps, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(chosenCaps);
+    return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser,
+                                    new OSXDummyUpstreamSurfaceHook(width, height));
   }
 
-  protected NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device,GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
-    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_MACOSX);
-    WrappedSurface ns = new WrappedSurface(MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, true));
-    ns.surfaceSizeChanged(width, height);
-    return ns;
+  @Override
+  protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final MacOSXGraphicsDevice device = new MacOSXGraphicsDevice(deviceReq.getUnitID());
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, screenIdx);
+    final MacOSXCGLGraphicsConfiguration config = MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, true);
+    return new WrappedSurface(config, windowHandle, upstream, true);
   }
 
-  protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-    AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);    
-    WrappedSurface ns = new WrappedSurface(MacOSXCGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, true), windowHandle);
-    return ns;    
-  }  
-  
+  @Override
   protected GLContext createExternalGLContextImpl() {
     return MacOSXExternalCGLContext.create(this);
   }
 
+  @Override
   public boolean canCreateExternalGLDrawable(AbstractGraphicsDevice device) {
     return false;
   }
 
+  @Override
   protected GLDrawable createExternalGLDrawableImpl() {
     // FIXME
     throw new GLException("Not yet implemented");
   }
 
-  public boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-    return false;
-  }
-
-  public GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException {
-    throw new GLException("not supported in non AWT enviroment");
-  }
-  
   //------------------------------------------------------
   // Gamma-related functionality
   //
@@ -362,21 +403,24 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
 
   /** Returns the length of the computed gamma ramp for this OS and
       hardware. Returns 0 if gamma changes are not supported. */
+  @Override
   protected int getGammaRampLength() {
     return GAMMA_RAMP_LENGTH;
   }
 
+  @Override
   protected boolean setGammaRamp(float[] ramp) {
-    return CGL.setGammaRamp(ramp.length,
-                            ramp, 0,
-                            ramp, 0,
-                            ramp, 0);
+    final FloatBuffer rampNIO = Buffers.newDirectFloatBuffer(ramp);
+
+    return CGL.setGammaRamp(ramp.length, rampNIO, rampNIO, rampNIO);
   }
 
+  @Override
   protected Buffer getGammaRamp() {
     return null;
   }
 
+  @Override
   protected void resetGammaRamp(Buffer originalGammaRamp) {
     CGL.resetGammaRamp();
   }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
index 03ec94db6..cda8307c7 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDynamicLibraryBundleInfo.java
@@ -3,14 +3,14 @@
  *
  * Redistribution and use in source and binary forms, with or without modification, are
  * permitted provided that the following conditions are met:
- * 
+ *
  *    1. Redistributions of source code must retain the above copyright notice, this list of
  *       conditions and the following disclaimer.
- * 
+ *
  *    2. Redistributions in binary form must reproduce the above copyright notice, this list
  *       of conditions and the following disclaimer in the documentation and/or other materials
  *       provided with the distribution.
- * 
+ *
  * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
@@ -20,35 +20,35 @@
  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- * 
+ *
  * The views and conclusions contained in the software and documentation are those of the
  * authors and should not be interpreted as representing official policies, either expressed
  * or implied, of JogAmp Community.
  */
- 
+
 package jogamp.opengl.macosx.cgl;
 
 import jogamp.opengl.*;
 import java.util.*;
 
-public class MacOSXCGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
+public final class MacOSXCGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBundleInfo  {
     protected MacOSXCGLDynamicLibraryBundleInfo() {
         super();
     }
 
     @Override
-    public List<List<String>> getToolLibNames() {
+    public final List<List<String>> getToolLibNames() {
         final List<List<String>> libsList = new ArrayList<List<String>>();
         final List<String> libsGL = new ArrayList<String>();
         libsGL.add("/System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib");
         libsGL.add("GL");
-        libsList.add(libsGL);        
+        libsList.add(libsGL);
         return libsList;
     }
-    
+
     @Override
     public final List<String> getToolGetProcAddressFuncNameList() {
-        return null; 
+        return null;
         /** OSX manual says: NSImage use is discouraged
         List res = new ArrayList();
         res.add("GetProcAddress"); // dummy
@@ -59,7 +59,7 @@ public class MacOSXCGLDynamicLibraryBundleInfo extends DesktopGLDynamicLibraryBu
     public final long toolGetProcAddress(long toolGetProcAddressHandle, String funcName) {
         return 0;
         /** OSX manual says: NSImage use is discouraged
-            return CGL.getProcAddress(glFuncName); // manual implementation 
+            return CGL.getProcAddress(glFuncName); // manual implementation
          */
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
index 8393a688e..481c0b94b 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,13 +29,14 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.macosx.cgl;
 
+import java.nio.IntBuffer;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -46,40 +47,34 @@ import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-
+import com.jogamp.common.nio.Buffers;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 
 public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration implements Cloneable {
-    long pixelformat;
 
-    MacOSXCGLGraphicsConfiguration(AbstractGraphicsScreen screen, 
-                                   GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
-                                   long pixelformat) {
+    MacOSXCGLGraphicsConfiguration(AbstractGraphicsScreen screen,
+                                   GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested) {
         super(screen, capsChosen, capsRequested);
-        this.pixelformat=pixelformat;
     }
 
+    @Override
     public Object clone() {
         return super.clone();
     }
 
-    void setChosenPixelFormat(long pixelformat) {
-        this.pixelformat=pixelformat;
-    }
-
     protected static List<GLCapabilitiesImmutable> getAvailableCapabilities(MacOSXCGLDrawableFactory factory, AbstractGraphicsDevice device) {
-        MacOSXCGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateOSXSharedResource(device);
+        MacOSXCGLDrawableFactory.SharedResource sharedResource = factory.getOrCreateSharedResourceImpl(device);
         if(null == sharedResource) {
             throw new GLException("Shared resource for device n/a: "+device);
         }
         // MacOSXGraphicsDevice osxDevice = sharedResource.getDevice();
         return new ArrayList<GLCapabilitiesImmutable>(0);
     }
-    
-    static final int[] cglInternalAttributeToken = new int[] {
+
+    static final IntBuffer cglInternalAttributeToken = Buffers.newDirectIntBuffer(new int[] {
         CGL.kCGLPFAOpenGLProfile,    // >= lion
-        CGL.NSOpenGLPFAAccelerated,  // query only (prefer accelerated, but allow non accelerated), ignored for createPixelformat 
+        CGL.NSOpenGLPFAAccelerated,  // query only (prefer accelerated, but allow non accelerated), ignored for createPixelformat
         CGL.NSOpenGLPFANoRecovery,
         CGL.kCGLPFAColorFloat,
         CGL.NSOpenGLPFAPixelBuffer,
@@ -91,70 +86,66 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
         CGL.NSOpenGLPFAAccumSize,
         CGL.NSOpenGLPFAStencilSize,
         CGL.NSOpenGLPFASampleBuffers,
-        CGL.NSOpenGLPFASamples };
+        CGL.NSOpenGLPFASamples });
 
-    static int[] GLCapabilities2NSAttribList(GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
-        int len = cglInternalAttributeToken.length;
-        int off = 0;
-        if ( !MacOSXCGLContext.isLionOrLater ) {
-            // no OpenGLProfile
-            off++;
-            len--;
-        }        
-        int[] ivalues = new int[len];
+    static IntBuffer GLCapabilities2NSAttribList(AbstractGraphicsDevice device, IntBuffer attrToken, GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
+        final int len = attrToken.remaining();
+        final int off = attrToken.position();
+        final IntBuffer ivalues = Buffers.newDirectIntBuffer(len);
 
         for (int idx = 0; idx < len; idx++) {
-          final int attr = cglInternalAttributeToken[idx+off];
+          final int attr = attrToken.get(idx+off);
           switch (attr) {
-              case CGL.kCGLPFAOpenGLProfile: 
-                ivalues[idx] = MacOSXCGLContext.GLProfile2CGLOGLProfileValue(ctp, major, minor);
+              case CGL.kCGLPFAOpenGLProfile:
+                ivalues.put(idx, MacOSXCGLContext.GLProfile2CGLOGLProfileValue(device, ctp, major, minor));
                 break;
               case CGL.NSOpenGLPFANoRecovery:
-                ivalues[idx] = caps.getHardwareAccelerated() ? 1 : 0;
+                ivalues.put(idx, caps.getHardwareAccelerated() ? 1 : 0);
                 break;
-                  
+
               case CGL.kCGLPFAColorFloat:
-                ivalues[idx] = caps.getPbufferFloatingPointBuffers() ? 1 : 0;
+                // ivalues.put(idx, ( !caps.isOnscreen() && caps.isPBuffer() && caps.getPbufferFloatingPointBuffers() ) ? 1 : 0);
+                  ivalues.put(idx, 0);
                 break;
 
               case CGL.NSOpenGLPFAPixelBuffer:
-                ivalues[idx] = caps.isPBuffer() ? 1 : 0;
+                ivalues.put(idx, ( !caps.isOnscreen() && caps.isPBuffer() ) ? 1 : 0);
                 break;
 
               case CGL.NSOpenGLPFADoubleBuffer:
-                ivalues[idx] = (caps.getDoubleBuffered() ? 1 : 0);
+                ivalues.put(idx, (caps.getDoubleBuffered() ? 1 : 0));
                 break;
 
               case CGL.NSOpenGLPFAStereo:
-                ivalues[idx] = (caps.getStereo() ? 1 : 0);
+                ivalues.put(idx, (caps.getStereo() ? 1 : 0));
                 break;
 
               case CGL.NSOpenGLPFAColorSize:
-                ivalues[idx] = (caps.getRedBits() + caps.getGreenBits() + caps.getBlueBits());
+                ivalues.put(idx, (caps.getRedBits() + caps.getGreenBits() + caps.getBlueBits()));
                 break;
 
               case CGL.NSOpenGLPFAAlphaSize:
-                ivalues[idx] = caps.getAlphaBits();
+                ivalues.put(idx, caps.getAlphaBits());
                 break;
 
               case CGL.NSOpenGLPFADepthSize:
-                ivalues[idx] = caps.getDepthBits();
+                ivalues.put(idx, caps.getDepthBits());
                 break;
 
               case CGL.NSOpenGLPFAAccumSize:
-                ivalues[idx] = (caps.getAccumRedBits() + caps.getAccumGreenBits() + caps.getAccumBlueBits() + caps.getAccumAlphaBits());
+                ivalues.put(idx, (caps.getAccumRedBits() + caps.getAccumGreenBits() + caps.getAccumBlueBits() + caps.getAccumAlphaBits()));
                 break;
 
               case CGL.NSOpenGLPFAStencilSize:
-                ivalues[idx] = caps.getStencilBits();
+                ivalues.put(idx, caps.getStencilBits());
                 break;
 
               case CGL.NSOpenGLPFASampleBuffers:
-                ivalues[idx] = caps.getSampleBuffers() ? 1 : 0;
+                ivalues.put(idx, caps.getSampleBuffers() ? 1 : 0);
                 break;
 
               case CGL.NSOpenGLPFASamples:
-                ivalues[idx] = caps.getSampleBuffers() ? ivalues[idx] = caps.getNumSamples() : 0;
+                ivalues.put(idx, caps.getNumSamples());
                 break;
 
               default:
@@ -164,152 +155,158 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
         return ivalues;
     }
 
-    static long GLCapabilities2NSPixelFormat(GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
-        int len = cglInternalAttributeToken.length;
-        int off = 0;
+    static long GLCapabilities2NSPixelFormat(AbstractGraphicsDevice device, GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
+        final IntBuffer attrToken = cglInternalAttributeToken.duplicate();
         if ( !MacOSXCGLContext.isLionOrLater ) {
             // no OpenGLProfile
-            off++;
-            len--;
-        }        
-        int[] ivalues = GLCapabilities2NSAttribList(caps, ctp, major, minor);
-        return CGL.createPixelFormat(cglInternalAttributeToken, off, len, ivalues, 0);
+            attrToken.position(1);
+        }
+        final IntBuffer ivalues = GLCapabilities2NSAttribList(device, attrToken, caps, ctp, major, minor);
+        return CGL.createPixelFormat(attrToken, attrToken.remaining(), ivalues);
     }
 
-    static GLCapabilitiesImmutable NSPixelFormat2GLCapabilities(GLProfile glp, long pixelFormat) {
+    static GLCapabilities NSPixelFormat2GLCapabilities(GLProfile glp, long pixelFormat) {
         return PixelFormat2GLCapabilities(glp, pixelFormat, true);
     }
 
-    static long GLCapabilities2CGLPixelFormat(GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
+    static long GLCapabilities2CGLPixelFormat(AbstractGraphicsDevice device, GLCapabilitiesImmutable caps, int ctp, int major, int minor) {
       // Set up pixel format attributes
-      int[] attrs = new int[256];
+      final IntBuffer attrs = Buffers.newDirectIntBuffer(256);
       int i = 0;
       if(MacOSXCGLContext.isLionOrLater) {
-          attrs[i++] = CGL.kCGLPFAOpenGLProfile; 
-          attrs[i++] = MacOSXCGLContext.GLProfile2CGLOGLProfileValue(ctp, major, minor);
-      }
-      if(caps.isPBuffer()) {
-        attrs[i++] = CGL.kCGLPFAPBuffer;
-      }
-      if (caps.getPbufferFloatingPointBuffers()) {
-        attrs[i++] = CGL.kCGLPFAColorFloat;
+          attrs.put(i++, CGL.kCGLPFAOpenGLProfile);
+          attrs.put(i++, MacOSXCGLContext.GLProfile2CGLOGLProfileValue(device, ctp, major, minor));
       }
+      /**
+      if(!caps.isOnscreen() && caps.isPBuffer()) {
+        attrs.put(i++, CGL.kCGLPFAPBuffer);
+        if (caps.getPbufferFloatingPointBuffers()) {
+          attrs.put(i++, CGL.kCGLPFAColorFloat);
+        }
+      } */
       if (caps.getDoubleBuffered()) {
-        attrs[i++] = CGL.kCGLPFADoubleBuffer;
+        attrs.put(i++, CGL.kCGLPFADoubleBuffer);
       }
       if (caps.getStereo()) {
-        attrs[i++] = CGL.kCGLPFAStereo;
+        attrs.put(i++, CGL.kCGLPFAStereo);
       }
-      attrs[i++] = CGL.kCGLPFAColorSize;
-      attrs[i++] = (caps.getRedBits() +
-                    caps.getGreenBits() +
-                    caps.getBlueBits());
-      attrs[i++] = CGL.kCGLPFAAlphaSize;
-      attrs[i++] = caps.getAlphaBits();
-      attrs[i++] = CGL.kCGLPFADepthSize;
-      attrs[i++] = caps.getDepthBits();
+      attrs.put(i++, CGL.kCGLPFAColorSize);
+      attrs.put(i++, ( caps.getRedBits() +
+                       caps.getGreenBits() +
+                       caps.getBlueBits() ) );
+      attrs.put(i++, CGL.kCGLPFAAlphaSize);
+      attrs.put(i++, caps.getAlphaBits());
+      attrs.put(i++, CGL.kCGLPFADepthSize);
+      attrs.put(i++, caps.getDepthBits());
       // FIXME: should validate stencil size as is done in MacOSXWindowSystemInterface.m
-      attrs[i++] = CGL.kCGLPFAStencilSize;
-      attrs[i++] = caps.getStencilBits();
-      attrs[i++] = CGL.kCGLPFAAccumSize;
-      attrs[i++] = (caps.getAccumRedBits() +
-                    caps.getAccumGreenBits() +
-                    caps.getAccumBlueBits() +
-                    caps.getAccumAlphaBits());
+      attrs.put(i++, CGL.kCGLPFAStencilSize);
+      attrs.put(i++, caps.getStencilBits());
+      attrs.put(i++, CGL.kCGLPFAAccumSize);
+      attrs.put(i++, ( caps.getAccumRedBits() +
+                       caps.getAccumGreenBits() +
+                       caps.getAccumBlueBits() +
+                       caps.getAccumAlphaBits() ) );
       if (caps.getSampleBuffers()) {
-        attrs[i++] = CGL.kCGLPFASampleBuffers;
-        attrs[i++] = 1;
-        attrs[i++] = CGL.kCGLPFASamples;
-        attrs[i++] = caps.getNumSamples();
+        attrs.put(i++, CGL.kCGLPFASampleBuffers);
+        attrs.put(i++, 1);
+        attrs.put(i++, CGL.kCGLPFASamples);
+        attrs.put(i++, caps.getNumSamples());
       }
 
       // Use attribute array to select pixel format
       PointerBuffer fmt = PointerBuffer.allocateDirect(1);
-      int[] numScreens = new int[1];
-      int res = CGL.CGLChoosePixelFormat(attrs, 0, fmt, numScreens, 0);
+      IntBuffer numScreens = Buffers.newDirectIntBuffer(1);
+      int res = CGL.CGLChoosePixelFormat(attrs, fmt, numScreens);
       if (res != CGL.kCGLNoError) {
         throw new GLException("Error code " + res + " while choosing pixel format");
       }
       return fmt.get(0);
     }
-    
-    static GLCapabilitiesImmutable CGLPixelFormat2GLCapabilities(long pixelFormat) {
+
+    static GLCapabilities CGLPixelFormat2GLCapabilities(long pixelFormat) {
         return PixelFormat2GLCapabilities(null, pixelFormat, false);
     }
 
-    private static GLCapabilitiesImmutable PixelFormat2GLCapabilities(GLProfile glp, long pixelFormat, boolean nsUsage) {
-        int len = cglInternalAttributeToken.length;
-        int off = 0;
+    private static GLCapabilities PixelFormat2GLCapabilities(GLProfile glp, long pixelFormat, boolean nsUsage) {
+        final IntBuffer attrToken = cglInternalAttributeToken.duplicate();
+        final int off;
         if ( !MacOSXCGLContext.isLionOrLater ) {
             // no OpenGLProfile
-            off++;
-            len--;
-        }        
-        int[] ivalues = new int[len];
+            off = 1;
+        } else {
+            off = 0;
+        }
+        attrToken.position(off);
+        final int len = attrToken.remaining();
+        final IntBuffer ivalues = Buffers.newDirectIntBuffer(len);
 
         // On this platform the pixel format is associated with the
         // context and not the drawable. However it's a reasonable
         // approximation to just store the chosen pixel format up in the
-        // NativeSurface's AbstractGraphicsConfiguration, 
+        // NativeSurface's AbstractGraphicsConfiguration,
         // since the public API doesn't provide for a different GLCapabilities per context.
         // Note: These restrictions of the platform's API might be considered as a bug anyways.
 
         // Figure out what attributes we really got
         if(nsUsage) {
-            CGL.queryPixelFormat(pixelFormat, cglInternalAttributeToken, off, len, ivalues, 0);
+            CGL.queryPixelFormat(pixelFormat, attrToken, len, ivalues);
         } else {
-            CGL.CGLQueryPixelFormat(pixelFormat, cglInternalAttributeToken, off, len, ivalues, 0);
+            CGL.CGLQueryPixelFormat(pixelFormat, attrToken, len, ivalues);
         }
+
         if(null == glp && MacOSXCGLContext.isLionOrLater) {
             // pre-scan for OpenGL Profile
             for (int i = 0; i < len; i++) {
-                if(CGL.kCGLPFAOpenGLProfile == cglInternalAttributeToken[i+off]) {
-                    switch(ivalues[i]) {
-                        case CGL.kCGLOGLPVersion_3_2_Core:
+                final int ivalue = ivalues.get(i);
+                if(CGL.kCGLPFAOpenGLProfile == attrToken.get(i+off)) {
+                    switch(ivalue) {
+                        case CGL.kCGLOGLPVersion_GL4_Core:
+                            glp = GLProfile.get(GLProfile.GL4);
+                            break;
+                        case CGL.kCGLOGLPVersion_GL3_Core:
                             glp = GLProfile.get(GLProfile.GL3);
                             break;
                         case CGL.kCGLOGLPVersion_Legacy:
                             glp = GLProfile.get(GLProfile.GL2);
-                            break;                            
+                            break;
                         default:
-                            throw new RuntimeException("Unhandled OSX OpenGL Profile: 0x"+Integer.toHexString(ivalues[i]));
+                            throw new RuntimeException("Unhandled OSX OpenGL Profile: 0x"+Integer.toHexString(ivalue));
                     }
-                }            
+                }
             }
         }
         if(null == glp) {
             glp = GLProfile.get(GLProfile.GL2);
         }
-        GLCapabilities caps = new GLCapabilities(glp);
+        final GLCapabilities caps = new GLCapabilities(glp);
+        int alphaBits = 0;
         for (int i = 0; i < len; i++) {
-          int attr = cglInternalAttributeToken[i+off];
+          final int attr = attrToken.get(i+off);
+          final int ivalue = ivalues.get(i);
           switch (attr) {
               case CGL.NSOpenGLPFAAccelerated:
-                caps.setHardwareAccelerated(ivalues[i] != 0);
+                caps.setHardwareAccelerated(ivalue != 0);
                 break;
-                
+
               case CGL.kCGLPFAColorFloat:
-                caps.setPbufferFloatingPointBuffers(ivalues[i] != 0);
+                // caps.setPbufferFloatingPointBuffers(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFAPixelBuffer:
-                caps.setPBuffer(ivalues[i] != 0);
+                caps.setPBuffer(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFADoubleBuffer:
-                caps.setDoubleBuffered(ivalues[i] != 0);
+                caps.setDoubleBuffered(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFAStereo:
-                caps.setStereo(ivalues[i] != 0);
+                caps.setStereo(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFAColorSize:
                 {
-                  int bitSize = ivalues[i];
-                  if (bitSize == 32)
-                    bitSize = 24;
-                  bitSize /= 3;
+                  final int bitSize = ( 32 == ivalue ? 24 : ivalue ) / 3;
                   caps.setRedBits(bitSize);
                   caps.setGreenBits(bitSize);
                   caps.setBlueBits(bitSize);
@@ -317,16 +314,17 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
                 break;
 
               case CGL.NSOpenGLPFAAlphaSize:
-                caps.setAlphaBits(ivalues[i]);
+                // ALPHA shall be set at last - due to it's auto setting by !opaque / samples
+                alphaBits = ivalue;
                 break;
 
               case CGL.NSOpenGLPFADepthSize:
-                caps.setDepthBits(ivalues[i]);
+                caps.setDepthBits(ivalue);
                 break;
 
               case CGL.NSOpenGLPFAAccumSize:
                 {
-                  int bitSize = ivalues[i] / 4;
+                  final int bitSize = ivalue / 4;
                   caps.setAccumRedBits(bitSize);
                   caps.setAccumGreenBits(bitSize);
                   caps.setAccumBlueBits(bitSize);
@@ -335,21 +333,22 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
                 break;
 
               case CGL.NSOpenGLPFAStencilSize:
-                caps.setStencilBits(ivalues[i]);
+                caps.setStencilBits(ivalue);
                 break;
 
               case CGL.NSOpenGLPFASampleBuffers:
-                caps.setSampleBuffers(ivalues[i] != 0);
+                caps.setSampleBuffers(ivalue != 0);
                 break;
 
               case CGL.NSOpenGLPFASamples:
-                caps.setNumSamples(ivalues[i]);
+                caps.setNumSamples(ivalue);
                 break;
 
               default:
                 break;
           }
         }
+        caps.setAlphaBits(alphaBits);
 
         return caps;
       }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
index 1a9070aef..db2a1df68 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -34,13 +34,17 @@
 package jogamp.opengl.macosx.cgl;
 
 import jogamp.opengl.GLGraphicsConfigurationFactory;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
+
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLDrawableFactory;
 
 
 /** Subclass of GraphicsConfigurationFactory used when non-AWT tookits
@@ -50,21 +54,16 @@ import javax.media.opengl.GLCapabilitiesImmutable;
 
 public class MacOSXCGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
     static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice.class, new MacOSXCGLGraphicsConfigurationFactory());
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice.class, GLCapabilitiesImmutable.class, new MacOSXCGLGraphicsConfigurationFactory());
     }
-    private MacOSXCGLGraphicsConfigurationFactory() {        
+    private MacOSXCGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
-        return chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, absScreen, false);
-    }
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
 
-    static MacOSXCGLGraphicsConfiguration chooseGraphicsConfigurationStatic(CapabilitiesImmutable capsChosen,
-                                                                            CapabilitiesImmutable capsRequested,
-                                                                            CapabilitiesChooser chooser,
-                                                                            AbstractGraphicsScreen absScreen, boolean usePBuffer) {
         if (absScreen == null) {
             throw new IllegalArgumentException("AbstractGraphicsScreen is null");
         }
@@ -77,11 +76,23 @@ public class MacOSXCGLGraphicsConfigurationFactory extends GLGraphicsConfigurati
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - requested");
         }
 
-        if (chooser != null &&
-            !(chooser instanceof GLCapabilitiesChooser)) {
+        if (chooser != null && !(chooser instanceof GLCapabilitiesChooser)) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilitiesChooser objects");
         }
 
-        return new MacOSXCGLGraphicsConfiguration(absScreen, (GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, 0);
+        return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested, (GLCapabilitiesChooser)chooser, absScreen, false);
+    }
+
+    static MacOSXCGLGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
+                                                                            GLCapabilitiesImmutable capsRequested,
+                                                                            GLCapabilitiesChooser chooser,
+                                                                            AbstractGraphicsScreen absScreen, boolean usePBuffer) {
+        if (absScreen == null) {
+            throw new IllegalArgumentException("AbstractGraphicsScreen is null");
+        }
+        final AbstractGraphicsDevice device = absScreen.getDevice();
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLDrawableFactory.getDesktopFactory(), device);
+
+        return new MacOSXCGLGraphicsConfiguration(absScreen, (GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested);
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
index 58cea4ade..ebb0fc6d1 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -49,23 +49,21 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 
-import com.jogamp.nativewindow.WrappedSurface;
-
-import jogamp.opengl.GLContextImpl;
+import jogamp.nativewindow.WrappedSurface;
 import jogamp.opengl.GLContextShareSet;
 import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
 
 
 public class MacOSXExternalCGLContext extends MacOSXCGLContext {
-  private GLContext lastContext;
 
   private MacOSXExternalCGLContext(Drawable drawable, boolean isNSContext, long handle) {
     super(drawable, null);
     setOpenGLMode(isNSContext ? GLBackendType.NSOPENGL : GLBackendType.CGL );
-    drawable.registerContext(this);
     this.contextHandle = handle;
     GLContextShareSet.contextCreated(this);
-    setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT);
+    if( !setGLFunctionAvailability(false, 0, 0, CTX_PROFILE_COMPAT, false /* strictMatch */, false /* withinGLVersionsMapping */) ) { // use GL_VERSION
+        throw new InternalError("setGLFunctionAvailability !strictMatch failed");
+    }
     getGLStateTracker().setEnabled(false); // external context usage can't track state in Java
   }
 
@@ -108,44 +106,30 @@ public class MacOSXExternalCGLContext extends MacOSXCGLContext {
     }
 
     AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_MACOSX);
-    MacOSXCGLGraphicsConfiguration cfg = new MacOSXCGLGraphicsConfiguration(aScreen, caps, caps, pixelFormat);
+    MacOSXCGLGraphicsConfiguration cfg = new MacOSXCGLGraphicsConfiguration(aScreen, caps, caps);
 
     if(0 == currentDrawable) {
         // set a fake marker stating a valid drawable
-        currentDrawable = 1; 
+        currentDrawable = 1;
     }
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(currentDrawable);
+    WrappedSurface ns = new WrappedSurface(cfg, currentDrawable, 64, 64, true);
     return new MacOSXExternalCGLContext(new Drawable(factory, ns), isNSContext, contextHandle);
   }
 
-  protected boolean createImpl(GLContextImpl shareWith) throws GLException {
+  @Override
+  protected boolean createImpl(final long shareWithHandle) throws GLException {
       return true;
   }
 
-  public int makeCurrent() throws GLException {
-    // Save last context if necessary to allow external GLContexts to
-    // talk to other GLContexts created by this library
-    GLContext cur = getCurrent();
-    if (cur != null && cur != this) {
-      lastContext = cur;
-      setCurrent(null);
-    }
-    return super.makeCurrent();
-  }  
-
-  public void release() throws GLException {
-    super.release();
-    setCurrent(lastContext);
-    lastContext = null;
-  }
-
+  @Override
   protected void makeCurrentImpl() throws GLException {
   }
 
+  @Override
   protected void releaseImpl() throws GLException {
   }
 
+  @Override
   protected void destroyImpl() throws GLException {
   }
 
@@ -155,14 +139,17 @@ public class MacOSXExternalCGLContext extends MacOSXCGLContext {
       super(factory, comp, true);
     }
 
+    @Override
     public GLContext createContext(GLContext shareWith) {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getWidth() {
       throw new GLException("Should not call this");
     }
 
+    @Override
     public int getHeight() {
       throw new GLException("Should not call this");
     }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLContext.java
deleted file mode 100644
index 949963fa0..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLContext.java
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl;
-
-import javax.media.opengl.*;
-import jogamp.opengl.*;
-
-public class MacOSXOffscreenCGLContext extends MacOSXPbufferCGLContext
-{  
-  public MacOSXOffscreenCGLContext(MacOSXPbufferCGLDrawable drawable,
-                                  GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-    
-  public int getOffscreenContextPixelDataType() {
-    GL gl = getGL();
-    return gl.isGL2GL3()?GL2GL3.GL_UNSIGNED_INT_8_8_8_8_REV:GL.GL_UNSIGNED_SHORT_5_5_5_1;
-  }
-
-  public int getOffscreenContextReadBuffer() {
-    return GL.GL_FRONT;
-  }
-
-  public boolean offscreenImageNeedsVerticalFlip() {
-    return true;
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java
index f81cd725e..446a834b9 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOffscreenCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -51,7 +51,8 @@ public class MacOSXOffscreenCGLDrawable extends MacOSXPbufferCGLDrawable {
     super(factory, target);
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    return new MacOSXOffscreenCGLContext(this, shareWith);
+    return new MacOSXCGLContext(this, shareWith);
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
deleted file mode 100644
index 9e051311c..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
+++ /dev/null
@@ -1,104 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl;
-
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
-
-import jogamp.opengl.GLContextImpl;
-
-public class MacOSXOnscreenCGLContext extends MacOSXCGLContext {
-
-  public MacOSXOnscreenCGLContext(MacOSXOnscreenCGLDrawable drawable,
-                                 GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  @Override
-  protected void makeCurrentImpl() throws GLException {
-      super.makeCurrentImpl();
-      drawableUpdatedNotify();  
-  }
-    
-  @Override
-  protected void drawableUpdatedNotify() throws GLException {
-    final int w = drawable.getWidth();
-    final int h = drawable.getHeight();
-    final boolean updateContext = ( 0!=updateHandle && CGL.updateContextNeedsUpdate(updateHandle) ) ||
-                                  w != lastWidth || h != lastHeight;
-    if(updateContext) {
-        lastWidth = w;
-        lastHeight = h;
-        if (contextHandle == 0) {
-          throw new GLException("Context not created");
-        }
-        CGL.updateContext(contextHandle);
-    }
-  }
-  
-  @Override
-  protected boolean createImpl(GLContextImpl sharedWith) {
-    boolean res = super.createImpl(sharedWith);
-    lastWidth = -1; 
-    lastHeight = -1;    
-    if(res && isNSContext()) {
-        if(0 != updateHandle) {
-            throw new InternalError("XXX1");
-        }
-        updateHandle = CGL.updateContextRegister(contextHandle, drawable.getHandle());
-        if(0 == updateHandle) {
-            throw new InternalError("XXX2");
-        }
-    }
-    return res;
-  }
-
-  @Override
-  protected void destroyImpl() throws GLException {
-    if ( 0 != updateHandle ) {
-        CGL.updateContextUnregister(updateHandle);
-        updateHandle = 0;
-    }
-    super.destroyImpl();    
-  }
-  
-  private long updateHandle = 0;
-  private int lastWidth, lastHeight;
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java
index 80c54042f..c6f0c1383 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -45,15 +45,14 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 
 public class MacOSXOnscreenCGLDrawable extends MacOSXCGLDrawable {
-  
+
   protected MacOSXOnscreenCGLDrawable(GLDrawableFactory factory, NativeSurface component) {
     super(factory, component, false);
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    final MacOSXOnscreenCGLContext ctx= new MacOSXOnscreenCGLContext(this, shareWith);
-    registerContext(ctx);
-    return ctx;
+    return new MacOSXCGLContext(this, shareWith);
   }
 
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLContext.java
deleted file mode 100644
index 7ba7d2d5a..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLContext.java
+++ /dev/null
@@ -1,91 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- */
-
-package jogamp.opengl.macosx.cgl;
-
-import javax.media.opengl.GL;
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
-import javax.media.opengl.GLPbuffer;
-
-import jogamp.opengl.GLContextImpl;
-
-public class MacOSXPbufferCGLContext extends MacOSXCGLContext {
-
-  // State for render-to-texture and render-to-texture-rectangle support
-  private int texture;       // actual texture object
-
-  public MacOSXPbufferCGLContext(MacOSXPbufferCGLDrawable drawable,
-                                GLContext shareWith) {
-    super(drawable, shareWith);
-  }
-
-  public void bindPbufferToTexture() {
-    GL gl = getGL();
-    gl.glBindTexture(((MacOSXPbufferCGLDrawable)drawable).getTextureTarget(), texture);
-    // FIXME: not clear whether this is really necessary, but since
-    // the API docs seem to imply it is and since it doesn't seem to
-    // impact performance, leaving it in
-    CGL.setContextTextureImageToPBuffer(contextHandle, drawable.getHandle(), GL.GL_FRONT);
-  }
-
-  public void releasePbufferFromTexture() {
-  }
-
-  protected boolean createImpl(GLContextImpl shareWith) {
-    boolean res = super.createImpl(shareWith);
-    if(res) {  
-      // Initialize render-to-texture support if requested
-      final GL gl = getGL();
-      final MacOSXPbufferCGLDrawable osxPDrawable = (MacOSXPbufferCGLDrawable)drawable;
-      final int textureTarget = osxPDrawable.getTextureTarget();
-  
-      int[] tmp = new int[1];
-      gl.glGenTextures(1, tmp, 0);
-      texture = tmp[0];
-      gl.glBindTexture(textureTarget, texture);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MIN_FILTER, GL.GL_NEAREST);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_MAG_FILTER, GL.GL_NEAREST);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
-      gl.glTexParameteri(textureTarget, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
-      gl.glTexImage2D(textureTarget, 0, GL.GL_RGB, osxPDrawable.getTextureWidth(), osxPDrawable.getTextureHeight(), 
-                      0, GL.GL_RGB, GL.GL_UNSIGNED_BYTE, null);
-      gl.glCopyTexSubImage2D(textureTarget, 0, 0, 0, 0, 0, drawable.getWidth(), drawable.getHeight());
-    }
-    return res;
-  }
-
-  public int getFloatingPointMode() {
-    return GLPbuffer.APPLE_FLOAT;
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
index 1e49d1fc9..f6e8b8fa3 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,20 +29,22 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
 
 package jogamp.opengl.macosx.cgl;
 
+import java.lang.ref.WeakReference;
+
 import javax.media.nativewindow.DefaultGraphicsConfiguration;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GL;
 import javax.media.opengl.GL2;
 import javax.media.opengl.GLCapabilitiesImmutable;
@@ -54,7 +56,7 @@ import javax.media.opengl.GLProfile;
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.opengl.util.GLBuffers;
 
-public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {  
+public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
   // Abstract interface for implementation of this drawable (either
   // NSOpenGL-based or CGL-based)
   interface GLBackendImpl {
@@ -64,24 +66,18 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
 
   // Implementation object (either NSOpenGL-based or CGL-based)
   protected GLBackendImpl impl;
-  
+
   // State for render-to-texture and render-to-texture-rectangle support
   // private int textureTarget; // e.g. GL_TEXTURE_2D, GL_TEXTURE_RECTANGLE_NV
   // private int texture;       // actual texture object
 
-  // Note that we can not store this in the NativeSurface because the
-  // semantic is that contains an NSView
-  protected long pBuffer;
   protected int pBufferTexTarget, pBufferTexWidth, pBufferTexHeight;
 
   public MacOSXPbufferCGLDrawable(GLDrawableFactory factory, NativeSurface target) {
     super(factory, target, false);
   }
 
-  protected void destroyImpl() {
-    setRealized(false);  
-  }
-  
+  @Override
   protected void setRealizedImpl() {
     if(realized) {
         createPbuffer();
@@ -90,45 +86,45 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
     }
   }
 
+  @Override
   public GLContext createContext(GLContext shareWith) {
-    final MacOSXPbufferCGLContext ctx = new MacOSXPbufferCGLContext(this, shareWith);
-    registerContext(ctx);
-    return ctx;
+    return new MacOSXCGLContext(this, shareWith);
   }
 
-  @Override
-  protected long getNSViewHandle() {
-      // pbuffer handle is NSOpenGLPixelBuffer
-      return 0;
-  }
-  
-  @Override
-  public long getHandle() {
-    return pBuffer;
-  }
-  
   protected int getTextureTarget() { return pBufferTexTarget;  }
   protected int getTextureWidth() { return pBufferTexWidth; }
   protected int getTextureHeight() { return pBufferTexHeight; }
-    
+
   protected void destroyPbuffer() {
-    if (this.pBuffer != 0) {
-      NativeSurface ns = getNativeSurface();
+    final MutableSurface ms = (MutableSurface) getNativeSurface();
+    final long pBuffer = ms.getSurfaceHandle();
+    if (0 != pBuffer) {
+      synchronized (createdContexts) {
+        for(int i=0; i<createdContexts.size(); ) {
+          final WeakReference<MacOSXCGLContext> ref = createdContexts.get(i);
+          final MacOSXCGLContext ctx = ref.get();
+          if (ctx != null) {
+            ctx.detachPBuffer();
+            i++;
+          } else {
+            createdContexts.remove(i);
+          }
+        }
+      }
       impl.destroy(pBuffer);
-      this.pBuffer = 0;
-      ((SurfaceChangeable)ns).setSurfaceHandle(0);
+      ms.setSurfaceHandle(0);
     }
   }
 
   private void createPbuffer() {
-    final NativeSurface ns = getNativeSurface();
-    final DefaultGraphicsConfiguration config = (DefaultGraphicsConfiguration) ns.getGraphicsConfiguration();
+    final MutableSurface ms = (MutableSurface) getNativeSurface();
+    final DefaultGraphicsConfiguration config = (DefaultGraphicsConfiguration) ms.getGraphicsConfiguration();
     final GLCapabilitiesImmutable capabilities = (GLCapabilitiesImmutable)config.getChosenCapabilities();
     final GLProfile glProfile = capabilities.getGLProfile();
-    MacOSXCGLDrawableFactory.SharedResource sr = ((MacOSXCGLDrawableFactory)factory).getOrCreateOSXSharedResource(config.getScreen().getDevice());
-    
+    MacOSXCGLDrawableFactory.SharedResource sr = ((MacOSXCGLDrawableFactory)factory).getOrCreateSharedResourceImpl(config.getScreen().getDevice());
+
     if (DEBUG) {
-        System.out.println("Pbuffer config: " + config);
+        System.out.println(getThreadName()+": Pbuffer config: " + config);
         if(null != sr) {
             System.out.println("Pbuffer NPOT Texure  avail: "+sr.isNPOTTextureAvailable());
             System.out.println("Pbuffer RECT Texture avail: "+sr.isRECTTextureAvailable());
@@ -137,12 +133,8 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
         }
     }
 
-    if ( capabilities.getPbufferRenderToTextureRectangle() && null!=sr && sr.isRECTTextureAvailable() ) {
-      pBufferTexTarget = GL2.GL_TEXTURE_RECTANGLE;
-    } else {
-      pBufferTexTarget = GL.GL_TEXTURE_2D;
-    }
-    if ( GL2.GL_TEXTURE_RECTANGLE == pBufferTexTarget || ( null!=sr && sr.isNPOTTextureAvailable() ) ) { 
+    pBufferTexTarget = GL.GL_TEXTURE_2D;
+    if ( null!=sr && sr.isNPOTTextureAvailable() ) {
       pBufferTexWidth = getWidth();
       pBufferTexHeight = getHeight();
     } else {
@@ -150,19 +142,8 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       pBufferTexHeight = GLBuffers.getNextPowerOf2(getHeight());
     }
 
-    int internalFormat = GL.GL_RGBA;
-    if (capabilities.getPbufferFloatingPointBuffers()) {
-      if(!glProfile.isGL2GL3() || null==sr || sr.isAppleFloatPixelsAvailable()) {
-          throw new GLException("Floating-point support (GL_APPLE_float_pixels) not available");
-      }
-      switch (capabilities.getRedBits()) {
-        case 16: internalFormat = GL2.GL_RGBA_FLOAT16_APPLE; break;
-        case 32: internalFormat = GL2.GL_RGBA_FLOAT32_APPLE; break;
-        default: throw new GLException("Invalid floating-point bit depth (only 16 and 32 supported)");
-      }
-    }
-    
-    pBuffer = impl.create(pBufferTexTarget, internalFormat, getWidth(), getHeight());
+    final int internalFormat = GL.GL_RGBA;
+    final long pBuffer = impl.create(pBufferTexTarget, internalFormat, getWidth(), getHeight());
     if(DEBUG) {
         System.err.println("MacOSXPbufferCGLDrawable tex: target "+toHexString(pBufferTexTarget)+
                             ", pbufferSize "+getWidth()+"x"+getHeight()+
@@ -175,14 +156,16 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       throw new GLException("pbuffer creation error: CGL.createPBuffer() failed");
     }
 
-    ((SurfaceChangeable)ns).setSurfaceHandle(pBuffer);
+    ms.setSurfaceHandle(pBuffer);
   }
 
+  @Override
   public void setOpenGLMode(GLBackendType mode) {
     super.setOpenGLMode(mode);
     createPbuffer(); // recreate
   }
 
+  @Override
   protected void initOpenGLImpl(GLBackendType backend) {
     switch (backend) {
       case NSOPENGL:
@@ -194,14 +177,16 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       default:
         throw new InternalError("Illegal implementation mode " + backend);
     }
-  }  
-  
+  }
+
   // NSOpenGLPixelBuffer implementation
   class NSOpenGLImpl implements GLBackendImpl {
+    @Override
     public long create(int renderTarget, int internalFormat, int width, int height) {
       return CGL.createPBuffer(renderTarget, internalFormat, width, height);
     }
 
+    @Override
     public void destroy(long pbuffer) {
       CGL.destroyPBuffer(pbuffer);
     }
@@ -209,6 +194,7 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
 
   // CGL implementation
   class CGLImpl implements GLBackendImpl {
+    @Override
     public long create(int renderTarget, int internalFormat, int width, int height) {
       PointerBuffer pbuffer = PointerBuffer.allocateDirect(1);
       int res = CGL.CGLCreatePBuffer(width, height, renderTarget, internalFormat, 0, pbuffer);
@@ -218,12 +204,13 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       return pbuffer.get(0);
     }
 
+    @Override
     public void destroy(long pbuffer) {
       int res = CGL.CGLDestroyPBuffer(pbuffer);
       if (res != CGL.kCGLNoError) {
         throw new GLException("Error destroying CGL-based pbuffer: error code " + res);
       }
     }
-  }  
-  
+  }
+
 }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLDrawableFactory.java
deleted file mode 100644
index fe60710f0..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLDrawableFactory.java
+++ /dev/null
@@ -1,60 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl.awt;
-
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
-import jogamp.opengl.macosx.cgl.*;
-
-public class MacOSXAWTCGLDrawableFactory extends MacOSXCGLDrawableFactory {
-
-  public MacOSXAWTCGLDrawableFactory() {
-    super();
-  }
-
-  public boolean canCreateContextOnJava2DSurface(AbstractGraphicsDevice device) {
-    return true;
-  }
-
-  public GLContext createContextOnJava2DSurface(Object graphics, GLContext shareWith)
-    throws GLException {
-    return new MacOSXJava2DCGLContext(shareWith);
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
index a6fa01bad..21923531f 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2008 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -58,14 +58,15 @@ import jogamp.opengl.macosx.cgl.MacOSXCGLGraphicsConfiguration;
 
 public class MacOSXAWTCGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
     public static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, new MacOSXAWTCGLGraphicsConfigurationFactory());
-    }    
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, GLCapabilitiesImmutable.class, new MacOSXAWTCGLGraphicsConfigurationFactory());
+    }
     private MacOSXAWTCGLGraphicsConfigurationFactory() {
     }
 
+    @Override
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         GraphicsDevice device = null;
         if (absScreen != null &&
             !(absScreen instanceof AWTGraphicsScreen)) {
@@ -103,9 +104,9 @@ public class MacOSXAWTCGLGraphicsConfigurationFactory extends GLGraphicsConfigur
 
         GraphicsConfiguration gc = device.getDefaultConfiguration();
         MacOSXCGLGraphicsConfiguration macConfig = (MacOSXCGLGraphicsConfiguration)
-            GraphicsConfigurationFactory.getFactory(macDevice).chooseGraphicsConfiguration(capsChosen,
+            GraphicsConfigurationFactory.getFactory(macDevice, capsChosen).chooseGraphicsConfiguration(capsChosen,
                                                                                            capsRequested,
-                                                                                           chooser, macScreen);
+                                                                                           chooser, macScreen, nativeVisualID);
 
         if (macConfig == null) {
             throw new GLException("Unable to choose a GraphicsConfiguration: "+capsChosen+",\n\t"+chooser+"\n\t"+macScreen);
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXJava2DCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXJava2DCGLContext.java
deleted file mode 100644
index f41400d83..000000000
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXJava2DCGLContext.java
+++ /dev/null
@@ -1,121 +0,0 @@
-/*
- * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved.
- * 
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- * 
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- * 
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- * 
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- * 
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- * 
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.macosx.cgl.awt;
-
-import java.awt.Graphics;
-
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
-
-import jogamp.opengl.GLContextImpl;
-import jogamp.opengl.awt.Java2D;
-import jogamp.opengl.awt.Java2DGLContext;
-import jogamp.opengl.macosx.cgl.MacOSXCGLContext;
-import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
-
-
-/** MacOSXCGLContext implementation supporting the Java2D/JOGL bridge
- * on Mac OS X. The external GLDrawable mechanism does not work on Mac
- * OS X due to how drawables and contexts are operated upon on this
- * platform, so it is necessary to supply an alternative means to
- * create, make current, and destroy contexts on the Java2D "drawable"
- * on the Mac platform.
- */
-
-public class MacOSXJava2DCGLContext extends MacOSXCGLContext implements Java2DGLContext {
-  private Graphics graphics;
-
-  // FIXME: ignoring context sharing for the time being; will need to
-  // rethink this in particular if using FBOs to implement the
-  // Java2D/OpenGL pipeline on Mac OS X
-
-  MacOSXJava2DCGLContext(GLContext shareWith) {
-    super(null, shareWith);
-  }
-
-  public void setGraphics(Graphics g) {
-    this.graphics = g;
-  }
-
-  protected void makeCurrentImpl() throws GLException {
-    if (!Java2D.makeOGLContextCurrentOnSurface(graphics, contextHandle)) {
-      throw new GLException("Error making context current");
-    }            
-  }
-
-  protected boolean createImpl(GLContextImpl shareWith) {
-    long share = createImplPreset(shareWith);
-    
-    long ctx = Java2D.createOGLContextOnSurface(graphics, share);
-    if (ctx == 0) {
-      if(DEBUG) { 
-          System.err.println("Error creating current: "+this);
-      }
-      return false;
-    }
-    if (!Java2D.makeOGLContextCurrentOnSurface(graphics, contextHandle)) {
-      Java2D.destroyOGLContext(ctx);
-      if(DEBUG) { 
-          System.err.println("Error making created context current: "+this);
-      }
-      return false;
-    }
-    setGLFunctionAvailability(true, 0, 0, CTX_PROFILE_COMPAT); // use GL_VERSION
-    contextHandle = ctx;
-    return true;
-  }
-
-  protected void releaseImpl() throws GLException {
-    // FIXME: would need another primitive in the Java2D class in
-    // order to implement this; hopefully should not matter for
-    // correctness
-  }
-
-  protected void destroyImpl() throws GLException {
-      Java2D.destroyOGLContext(contextHandle);
-  }
-
-  public void setOpenGLMode(GLBackendType mode) {
-    if (mode != GLBackendType.CGL) {
-      throw new GLException("OpenGL mode switching not supported for Java2D GLContexts");
-    }
-    super.setOpenGLMode(mode);
-  }
-}