Merge remote-tracking branch 'github-sgothel/master' into armv6hf

50 files changed, 2064 insertions, 1150 deletions

diff --git a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PES2.java b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PES2.java
index 804e9ee14..aabef29b0 100644
--- a/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PES2.java
+++ b/src/jogl/classes/jogamp/graph/curve/opengl/VBORegion2PES2.java
@@ -32,7 +32,6 @@ import java.nio.FloatBuffer;
 import javax.media.opengl.GL2ES2;
 // FIXME: Subsume GL2GL3.GL_DRAW_FRAMEBUFFER -> GL2ES2.GL_DRAW_FRAMEBUFFER ! 
 import javax.media.opengl.GL;
-import javax.media.opengl.GLException;
 import javax.media.opengl.GLUniformData;
 import javax.media.opengl.fixedfunc.GLMatrixFunc;
 
@@ -45,7 +44,9 @@ import com.jogamp.graph.geom.Vertex;
 
 import com.jogamp.graph.curve.opengl.GLRegion;
 import com.jogamp.graph.curve.opengl.RenderState;
-import com.jogamp.opengl.util.FBObject;
+import com.jogamp.opengl.FBObject;
+import com.jogamp.opengl.FBObject.Attachment;
+import com.jogamp.opengl.FBObject.TextureAttachment;
 import com.jogamp.opengl.util.GLArrayDataServer;
 import com.jogamp.opengl.util.PMVMatrix;
 import com.jogamp.opengl.util.glsl.ShaderState;
@@ -60,6 +61,7 @@ public class VBORegion2PES2  extends GLRegion {
     
     
     private FBObject fbo;
+    private TextureAttachment texA;
     private PMVMatrix fboPMVMatrix;
     GLUniformData mgl_fboPMVMatrix;
     
@@ -72,7 +74,7 @@ public class VBORegion2PES2  extends GLRegion {
         super(renderModes);
         fboPMVMatrix = new PMVMatrix();
         mgl_fboPMVMatrix = new GLUniformData(UniformNames.gcu_PMVMatrix, 4, 4, fboPMVMatrix.glGetPMvMatrixf());        
-        mgl_ActiveTexture = new GLUniformData(UniformNames.gcu_TextureUnit, textureEngine);        
+        mgl_ActiveTexture = new GLUniformData(UniformNames.gcu_TextureUnit, textureEngine);    
     }
     
     public void update(GL2ES2 gl, RenderState rs) {
@@ -214,8 +216,9 @@ public class VBORegion2PES2  extends GLRegion {
         final ShaderState st = rs.getShaderState();
         
         gl.glViewport(0, 0, width, hight);        
-        st.uniform(gl, mgl_ActiveTexture);        
-        fbo.use(gl, 0);                        
+        st.uniform(gl, mgl_ActiveTexture);    
+        gl.glActiveTexture(GL.GL_TEXTURE0 + mgl_ActiveTexture.intValue());
+        fbo.use(gl, texA);                        
         verticeFboAttr.enableBuffer(gl, true);       
         texCoordFboAttr.enableBuffer(gl, true);
         indicesFbo.enableBuffer(gl, true);
@@ -244,20 +247,16 @@ public class VBORegion2PES2  extends GLRegion {
         // System.out.println("FBO Scale: " + m.glGetMatrixf().get(0) +" " + m.glGetMatrixf().get(5));
         
         if(null != fbo && fbo.getWidth() != tex_width_c && fbo.getHeight() != tex_height_c ) {
-            fbo.destroy(gl);
-            fbo = null;
+            fbo.reset(gl, tex_width_c, tex_height_c);
         }
         
-        if(null == fbo) {        
-            fbo = new FBObject(tex_width_c, tex_height_c);
-            fbo.init(gl); 
+        if(null == fbo) {  
+            fbo = new FBObject();
+            fbo.reset(gl, tex_width_c, tex_height_c); 
             // FIXME: shall not use bilinear, due to own AA ? However, w/o bilinear result is not smooth
-            fbo.attachTexture2D(gl, mgl_ActiveTexture.intValue(), GL2ES2.GL_LINEAR, GL2ES2.GL_LINEAR, GL2ES2.GL_CLAMP_TO_EDGE, GL2ES2.GL_CLAMP_TO_EDGE);
-            // fbo.attachTexture2D(gl, mgl_ActiveTexture.intValue(), GL2ES2.GL_NEAREST, GL2ES2.GL_NEAREST, GL2ES2.GL_CLAMP_TO_EDGE, GL2ES2.GL_CLAMP_TO_EDGE);
-            fbo.attachDepthBuffer(gl, GL.GL_DEPTH_COMPONENT16); // FIXME: or shall we use 24 or 32 bit depth ?
-            if(!fbo.isStatusValid()) {
-                throw new GLException("FBO invalid: "+fbo);
-            }
+            texA = fbo.attachTexture2D(gl, 0, true, GL2ES2.GL_LINEAR, GL2ES2.GL_LINEAR, GL2ES2.GL_CLAMP_TO_EDGE, GL2ES2.GL_CLAMP_TO_EDGE);
+            // texA = fbo.attachTexture2D(gl, 0, GL2ES2.GL_NEAREST, GL2ES2.GL_NEAREST, GL2ES2.GL_CLAMP_TO_EDGE, GL2ES2.GL_CLAMP_TO_EDGE);
+            fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, 24);
         } else {
             fbo.bind(gl);
         }
@@ -305,6 +304,7 @@ public class VBORegion2PES2  extends GLRegion {
         if(null != fbo) {
             fbo.destroy(gl);
             fbo = null;
+            texA = null;
         }        
         if(null != verticeTxtAttr) {
             st.ownAttribute(verticeTxtAttr, false);
diff --git a/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java b/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
index 5c6d7446a..cc4e1b434 100644
--- a/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
+++ b/src/jogl/classes/jogamp/opengl/GLAutoDrawableBase.java
@@ -30,6 +30,8 @@ package jogamp.opengl;
 
 import java.io.PrintStream;
 
+import javax.media.nativewindow.AbstractGraphicsConfiguration;
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.WindowClosingProtocol;
 import javax.media.nativewindow.WindowClosingProtocol.WindowClosingMode;
@@ -46,6 +48,7 @@ import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.GLRunnable;
 
+import com.jogamp.common.util.locks.RecursiveLock;
 import com.jogamp.opengl.util.Animator;
 
 
@@ -63,43 +66,69 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
     protected final GLDrawableHelper helper = new GLDrawableHelper();
     protected final FPSCounterImpl fpsCounter = new FPSCounterImpl();
     
-    protected GLDrawableImpl drawable;
+    protected volatile GLDrawableImpl drawable; // volatile: avoid locking for read-only access
     protected GLContextImpl context;
+    protected final boolean ownDevice;
     protected int additionalCtxCreationFlags = 0;
-    protected boolean sendReshape = false;
-    protected boolean sendDestroy = false;
+    protected volatile boolean sendReshape = false; // volatile: maybe written by WindowManager thread w/o locking
+    protected volatile boolean sendDestroy = false; // volatile: maybe written by WindowManager thread w/o locking
 
-    public GLAutoDrawableBase(GLDrawableImpl drawable, GLContextImpl context) {
+    /**
+     * @param drawable a valid {@link GLDrawableImpl}, may not be realized yet.
+     * @param context a valid {@link GLContextImpl}, may not be made current (created) yet.
+     * @param ownDevice pass <code>true</code> if {@link AbstractGraphicsDevice#close()} shall be issued,
+     *                  otherwise pass <code>false</code>. Closing the device is required in case
+     *                  the drawable is created w/ it's own new instance, e.g. offscreen drawables,
+     *                  and no further lifecycle handling is applied.
+     */
+    public GLAutoDrawableBase(GLDrawableImpl drawable, GLContextImpl context, boolean ownDevice) {
         this.drawable = drawable;
         this.context = context;
+        this.ownDevice = ownDevice;
         resetFPSCounter();        
     }
    
+    protected abstract RecursiveLock getLock();
+    
     /** Returns the delegated GLDrawable */
     public final GLDrawable getDelegatedDrawable() { return drawable; }
     
     /** Default implementation to handle repaint events from the windowing system */
-    protected void defaultWindowRepaintOp() {
-        if( null != drawable && drawable.isRealized() ) {
-            if( !drawable.getNativeSurface().isSurfaceLockedByOtherThread() && !helper.isAnimatorAnimating() ) {
+    protected final void defaultWindowRepaintOp() {
+        final GLDrawable _drawable = drawable;
+        if( null != _drawable && _drawable.isRealized() ) {
+            if( !_drawable.getNativeSurface().isSurfaceLockedByOtherThread() && !helper.isAnimatorAnimating() ) {
                 display();
             }
-        }        
+        }
     }
     
     /** Default implementation to handle resize events from the windowing system */
-    protected void defaultWindowResizedOp() {
-        if( null!=drawable ) {
+    protected final void defaultWindowResizedOp() {
+        final GLDrawable _drawable = drawable;
+        if( null!=_drawable ) {
             if(DEBUG) {
                 System.err.println("GLAutoDrawableBase.sizeChanged: ("+Thread.currentThread().getName()+"): "+getWidth()+"x"+getHeight()+" - surfaceHandle 0x"+Long.toHexString(getNativeSurface().getSurfaceHandle()));
             }
-            sendReshape = true;
-            defaultWindowRepaintOp();
+            sendReshape = true; // async if display() doesn't get called below, but avoiding deadlock
+            if( _drawable.isRealized() ) {
+                if( !_drawable.getNativeSurface().isSurfaceLockedByOtherThread() && !helper.isAnimatorAnimating() ) {
+                    display();
+                }
+            }        
         }
     }
 
-    /** Default implementation to handle destroy notifications from the windowing system */
-    protected void defaultWindowDestroyNotifyOp() {
+    /** 
+     * Default implementation to handle destroy notifications from the windowing system.
+     * 
+     * <p>
+     * If the {@link NativeSurface} does not implement {@link WindowClosingProtocol} 
+     * or {@link WindowClosingMode#DISPOSE_ON_CLOSE} is enabled (default),
+     * {@link #defaultDestroy()} is being called.
+     * </p> 
+     */
+    protected final void defaultWindowDestroyNotifyOp() {
         final NativeSurface ns = getNativeSurface();
         final boolean shallClose;
         if(ns instanceof WindowClosingProtocol) {
@@ -108,27 +137,66 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
             shallClose = true;
         }        
         if( shallClose ) {
-            // Is an animator thread perform rendering?
-            if (helper.isExternalAnimatorRunning()) {
-                // Pause animations before initiating safe destroy.
-                final GLAnimatorControl ctrl = helper.getAnimator();
-                final boolean isPaused = ctrl.pause();
-                destroy();
-                if(isPaused) {
-                    ctrl.resume();
-                }
-            } else if (null != ns && ns.isSurfaceLockedByOtherThread()) {
-                // surface is locked by another thread
-                // Flag that destroy should be performed on the next
-                // attempt to display.
-                sendDestroy = true;
-            } else {
-                // Without an external thread animating or locking the
-                // surface, we are safe.
-                destroy ();
-            }
+            destroyAvoidAwareOfLocking();
         }                
     }
+
+    /**
+     * Calls {@link #destroy()} 
+     * directly if the following requirements are met:
+     * <ul>
+     *   <li>An {@link GLAnimatorControl} is bound (see {@link #getAnimator()}) and running on another thread. 
+     *       Here we pause the animation while issuing the destruction.</li>
+     *   <li>Surface is not locked by another thread (considered anonymous).</li>
+     * </ul>
+     * <p>
+     * Otherwise destroy is being flagged to be called within the next 
+     * call of display().
+     * </p>
+     * <p>
+     * This method is being used to avoid deadlock if
+     * destruction is desired by <i>other</i> threads, e.g. the window manager.
+     * </p>
+     * @see #defaultWindowDestroyNotifyOp()
+     * @see #defaultDisplay()
+     */
+    protected final void destroyAvoidAwareOfLocking() {
+        final NativeSurface ns = getNativeSurface();
+        
+        final GLAnimatorControl ctrl = helper.getAnimator();
+        
+        // Is an animator thread perform rendering?
+        if ( helper.isAnimatorRunningOnOtherThread() ) {
+            // Pause animations before initiating safe destroy.
+            final boolean isPaused = ctrl.pause();
+            destroy();
+            if(isPaused) {
+                ctrl.resume();
+            }
+        } else if (null != ns && ns.isSurfaceLockedByOtherThread()) {
+            // surface is locked by another thread
+            // Flag that destroy should be performed on the next
+            // attempt to display.
+            sendDestroy = true; // async, but avoiding deadlock
+        } else {
+            // Without an external thread animating or locking the
+            // surface, we are safe.
+            destroy();
+        }
+    }
+    
+    /**
+     * Calls {@link #destroyImplInLock()} while claiming the lock.
+     */
+    protected final void defaultDestroy() {
+        final RecursiveLock lock = getLock();
+        lock.lock();
+        try {
+            destroyImplInLock();
+        } finally {
+            lock.unlock();
+        }
+    }
     
     /**
      * Default implementation to destroys the drawable and context of this GLAutoDrawable:
@@ -137,24 +205,47 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
      *   <li>destroys the GLContext, if valid</li>
      *   <li>destroys the GLDrawable, if valid</li>
      * </ul>
+     * <p>Method assumes the lock is being hold.</p>
+     * <p>Override it to extend it to destroy your resources, i.e. the actual window.
+     * In such case call <code>super.destroyImplInLock</code> first.</p>
      */
-    protected void defaultDestroyOp() {
-        if( null != drawable && drawable.isRealized() ) {
-            if( null != context && context.isCreated() ) {
-                // Catch dispose GLExceptions by GLEventListener, just 'print' them
-                // so we can continue with the destruction.
-                try {
-                    helper.disposeGL(this, drawable, context, null);
-                } catch (GLException gle) {
-                    gle.printStackTrace();
+    protected void destroyImplInLock() {
+        final GLContext _context = context;
+        final GLDrawable _drawable = drawable;
+        if( null != _drawable ) {
+            if( _drawable.isRealized() ) {
+                if( null != _context && _context.isCreated() ) {
+                    // Catch dispose GLExceptions by GLEventListener, just 'print' them
+                    // so we can continue with the destruction.
+                    try {
+                        helper.disposeGL(this, _drawable, _context, null);
+                    } catch (GLException gle) {
+                        gle.printStackTrace();
+                    }
                 }
+                _drawable.setRealized(false);
+            }
+            if( ownDevice ) {
+                _drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice().close();
             }
-            drawable.setRealized(false);
         }
         context = null;
         drawable = null;        
     }
     
+    public final void defaultSwapBuffers() throws GLException {
+        final RecursiveLock _lock = getLock();
+        _lock.lock();
+        try {            
+            if(drawable!=null && context != null) {
+                drawable.swapBuffers();
+                helper.invokeGL(drawable, context, defaultSwapAction, defaultInitAction);
+            }
+        } finally {
+            _lock.unlock();
+        }
+    }
+
     //
     // GLAutoDrawable
     //
@@ -179,6 +270,30 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
             fpsCounter.tickFPS();
         } };
 
+    protected final void defaultDisplay() {
+        if( sendDestroy ) {
+            sendDestroy=false;
+            destroy();
+            return;
+        }
+        final RecursiveLock _lock = getLock();        
+        _lock.lock();
+        try {
+            if( null != context ) {
+                // surface is locked/unlocked implicit by context's makeCurrent/release
+                helper.invokeGL(drawable, context, defaultDisplayAction, defaultInitAction);
+            }
+        } finally {
+            _lock.unlock();
+        }
+    }
+        
+    protected final Runnable defaultSwapAction = new Runnable() {
+        @Override
+        public final void run() {
+            drawable.swapBuffers();
+        } } ;
+        
     @Override
     public final GLContext getContext() {
         return context;
@@ -186,27 +301,35 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
 
     @Override
     public final GLContext setContext(GLContext newCtx) {
-        final GLContext oldCtx = context;
-        final boolean newCtxCurrent = helper.switchContext(drawable, oldCtx, newCtx, additionalCtxCreationFlags);
-        context=(GLContextImpl)newCtx;
-        if(newCtxCurrent) {
-            context.makeCurrent();
+        final RecursiveLock lock = getLock();
+        lock.lock();
+        try {
+            final GLContext oldCtx = context;
+            final boolean newCtxCurrent = helper.switchContext(drawable, oldCtx, newCtx, additionalCtxCreationFlags);
+            context=(GLContextImpl)newCtx;
+            if(newCtxCurrent) {
+                context.makeCurrent();
+            }
+            return oldCtx;
+        } finally {
+            lock.unlock();
         }
-        return oldCtx;
     }
 
     @Override
     public final GL getGL() {
-        if (context == null) {
+        final GLContext _context = context;
+        if (_context == null) {
             return null;
         }
-        return context.getGL();
+        return _context.getGL();
     }
 
     @Override
     public final GL setGL(GL gl) {
-        if (context != null) {
-            context.setGL(gl);
+        final GLContext _context = context;
+        if (_context != null) {
+            _context.setGL(gl);
             return gl;
         }
         return null;
@@ -261,8 +384,9 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
     @Override
     public final void setContextCreationFlags(int flags) {
         additionalCtxCreationFlags = flags;        
-        if(null != context) {
-            context.setContextCreationFlags(additionalCtxCreationFlags);
+        final GLContext _context = context;
+        if(null != _context) {
+            _context.setContextCreationFlags(additionalCtxCreationFlags);
         }
     }
 
@@ -331,27 +455,36 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
         
     @Override
     public final GLContext createContext(final GLContext shareWith) {
-        if(drawable != null) {
-            final GLContext _ctx = drawable.createContext(shareWith);
-            _ctx.setContextCreationFlags(additionalCtxCreationFlags);
-            return _ctx;
+        final RecursiveLock lock = getLock();
+        lock.lock();
+        try {
+            if(drawable != null) {
+                final GLContext _ctx = drawable.createContext(shareWith);
+                _ctx.setContextCreationFlags(additionalCtxCreationFlags);
+                return _ctx;
+            }
+            return null;
+        } finally {
+            lock.unlock();
         }
-        return null;
     }
 
     @Override
     public final boolean isRealized() {
-        return null != drawable ? drawable.isRealized() : false;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.isRealized() : false;
     }
 
     @Override
     public int getWidth() {
-        return null != drawable ? drawable.getWidth() : 0;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getWidth() : 0;
     }
 
     @Override
     public int getHeight() {
-        return null != drawable ? drawable.getHeight() : 0;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getHeight() : 0;
     }
 
     /**
@@ -374,29 +507,26 @@ public abstract class GLAutoDrawableBase implements GLAutoDrawable, FPSCounter {
     }
 
     @Override
-    public final void swapBuffers() throws GLException {
-        if(drawable!=null && context != null) {
-            drawable.swapBuffers();
-        }
-    }
-
-    @Override
     public final GLCapabilitiesImmutable getChosenGLCapabilities() {
-        return null != drawable ? drawable.getChosenGLCapabilities() : null;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getChosenGLCapabilities() : null;
     }
 
     @Override
     public final GLProfile getGLProfile() {
-        return null != drawable ? drawable.getGLProfile() : null;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getGLProfile() : null;
     }
 
     @Override
     public final NativeSurface getNativeSurface() {
-        return null != drawable ? drawable.getNativeSurface() : null;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getNativeSurface() : null;
     }
 
     @Override
     public final long getHandle() {
-        return null != drawable ? drawable.getHandle() : 0;
+        final GLDrawable _drawable = drawable;
+        return null != _drawable ? _drawable.getHandle() : 0;
     }
 }
diff --git a/src/jogl/classes/jogamp/opengl/GLContextImpl.java b/src/jogl/classes/jogamp/opengl/GLContextImpl.java
index 4dd8806fa..bf6a0ee6e 100644
--- a/src/jogl/classes/jogamp/opengl/GLContextImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLContextImpl.java
@@ -49,8 +49,9 @@ import com.jogamp.common.os.DynamicLookupHelper;
 import com.jogamp.common.util.ReflectionUtil;
 import com.jogamp.gluegen.runtime.FunctionAddressResolver;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
-import com.jogamp.gluegen.runtime.opengl.GLExtensionNames;
+import com.jogamp.gluegen.runtime.opengl.GLNameResolver;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLExtensions;
 
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
@@ -88,13 +89,14 @@ public abstract class GLContextImpl extends GLContext {
   // Tracks creation and initialization of buffer objects to avoid
   // repeated glGet calls upon glMapBuffer operations
   private GLBufferSizeTracker bufferSizeTracker; // Singleton - Set by GLContextShareSet
-  private GLBufferStateTracker bufferStateTracker = new GLBufferStateTracker();
-  private GLStateTracker glStateTracker = new GLStateTracker();
+  private final GLBufferStateTracker bufferStateTracker = new GLBufferStateTracker();
+  private final GLStateTracker glStateTracker = new GLStateTracker();
   private GLDebugMessageHandler glDebugHandler = null;
+  private final int[] boundFBOTarget = new int[] { 0, 0 }; // { draw, read }
 
   protected GLDrawableImpl drawable;
   protected GLDrawableImpl drawableRead;
-
+  
   protected GL gl;
 
   protected static final Object mappedContextTypeObjectLock;
@@ -140,11 +142,11 @@ public abstract class GLContextImpl extends GLContext {
           bufferSizeTracker.clearCachedBufferSizes();
       }
 
-      if (bufferStateTracker != null) {
+      if (bufferStateTracker != null) { // <init>
           bufferStateTracker.clearBufferObjectState();
       }
 
-      if (glStateTracker != null) {
+      if (glStateTracker != null) { // <init>
           glStateTracker.clearStates(false);
       }
 
@@ -156,6 +158,11 @@ public abstract class GLContextImpl extends GLContext {
 
       glRenderer = "";
       glRendererLowerCase = glRenderer;
+      
+      if (boundFBOTarget != null) { // <init>
+          boundFBOTarget[0] = 0; // draw
+          boundFBOTarget[1] = 0; // read
+      }
 
       super.resetStates();
   }
@@ -199,7 +206,7 @@ public abstract class GLContextImpl extends GLContext {
         drawableRead = (GLDrawableImpl) readWrite;
     }
     final GLDrawable old = drawable;
-    drawable = ( null != readWrite ) ? (GLDrawableImpl) readWrite : null;
+    drawable = (GLDrawableImpl) readWrite ;
     if(lockHeld) {
         makeCurrent();
     }
@@ -252,16 +259,19 @@ public abstract class GLContextImpl extends GLContext {
   public void release() throws GLException {
     release(false);
   }
-  private void release(boolean force) throws GLException {
+  private void release(boolean inDestruction) throws GLException {
     if(TRACE_SWITCH) {
-        System.err.println(getThreadName() +": GLContext.ContextSwitch: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+" - release() - force: "+force+", "+lock);
+        System.err.println(getThreadName() +": GLContext.ContextSwitch: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+" - release() - force: "+inDestruction+", "+lock);
     }
     if ( !lock.isOwner(Thread.currentThread()) ) {
         throw new GLException("Context not current on current thread "+Thread.currentThread().getName()+": "+this);
     }
-    final boolean actualRelease = ( force || lock.getHoldCount() == 1 ) && 0 != contextHandle;
+    final boolean actualRelease = ( inDestruction || lock.getHoldCount() == 1 ) && 0 != contextHandle;
     try {
         if( actualRelease ) {
+            if( !inDestruction ) {
+                drawable.contextMadeCurrent(this, false);
+            }
             releaseImpl();
         }
     } finally {
@@ -306,13 +316,12 @@ public abstract class GLContextImpl extends GLContext {
               }
               try {
                   // release current context
-                  if(null != glDebugHandler) {
-                      if(lock.getHoldCount() == 1) {
-                          // needs current context to disable debug handler
-                          makeCurrent();
-                      }
-                      glDebugHandler.enable(false);
+                  if(lock.getHoldCount() == 1) {
+                      // needs current context to disable debug handler
+                      makeCurrent();
                   }
+                  drawable.contextRealized(this, false);
+                  glDebugHandler.enable(false);
                   if(lock.getHoldCount() > 1) {
                       // pending release() after makeCurrent()
                       release(true);
@@ -329,7 +338,6 @@ public abstract class GLContextImpl extends GLContext {
                   if (TRACE_SWITCH) {
                       System.err.println(getThreadName() + ": GLContextImpl.destroy.X: obj " + toHexString(hashCode()) + ", ctx " + toHexString(contextHandle) +
                               ", isShared "+GLContextShareSet.isShared(this)+" - "+lock);
-                      Thread.dumpStack(); // JAU
                   }
               }
           } finally {
@@ -488,11 +496,18 @@ public abstract class GLContextImpl extends GLContext {
         if(TRACE_GL) {
             gl = gl.getContext().setGL( GLPipelineFactory.create("javax.media.opengl.Trace", null, gl, new Object[] { System.err } ) );
         }
+        
+        drawable.contextRealized(this, true);
+        
         if(DEBUG || TRACE_SWITCH) {
             System.err.println(getThreadName() +": GLContext.ContextSwitch: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+" - switch - CONTEXT_CURRENT_NEW - "+lock);
         }
-      } else if(TRACE_SWITCH) {
-        System.err.println(getThreadName() +": GLContext.ContextSwitch: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+" - switch - CONTEXT_CURRENT - "+lock);
+      } else {
+        drawable.contextMadeCurrent(this, true);
+        
+        if(TRACE_SWITCH) {
+            System.err.println(getThreadName() +": GLContext.ContextSwitch: obj " + toHexString(hashCode()) + ", ctx "+toHexString(contextHandle)+" - switch - CONTEXT_CURRENT - "+lock);
+        }
       }
 
       /* FIXME: refactor dependence on Java 2D / JOGL bridge
@@ -543,14 +558,11 @@ public abstract class GLContextImpl extends GLContext {
             final AbstractGraphicsConfiguration config = drawable.getNativeSurface().getGraphicsConfiguration();
             final AbstractGraphicsDevice device = config.getScreen().getDevice();
 
-            if( !GLContext.getAvailableGLVersionsSet(device) ) {
-                final int reqMajor;
-                final int reqProfile;
-                if( 0 != ( ctxOptions & GLContext.CTX_PROFILE_ES) ) {
-                    // ES1 or ES2
-                    reqMajor = ctxMajorVersion;
-                    reqProfile = GLContext.CTX_PROFILE_ES;
-                } else {
+            // Non ARB desktop profiles may not have been registered 
+            if( !GLContext.getAvailableGLVersionsSet(device) ) {        // not yet set
+                if( 0 == ( ctxOptions & GLContext.CTX_PROFILE_ES) ) {   // not ES profile
+                    final int reqMajor;
+                    final int reqProfile;
                     if(ctxMajorVersion<3 || ctxMajorVersion==3 && ctxMinorVersion==0) {
                         reqMajor = 2;
                     } else {
@@ -561,12 +573,13 @@ public abstract class GLContextImpl extends GLContext {
                     } else {
                         reqProfile = GLContext.CTX_PROFILE_COMPAT;
                     }
-                }
-                GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile,
-                                                ctxMajorVersion, ctxMinorVersion, ctxOptions);
-                GLContext.setAvailableGLVersionsSet(device);
-                if (DEBUG) {
-                  System.err.println(getThreadName() + ": createContextOLD-MapVersionsAvailable HAVE: " + device+" -> "+reqMajor+"."+reqProfile+ " -> "+getGLVersion());
+                    GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile,
+                                                    ctxMajorVersion, ctxMinorVersion, ctxOptions);
+                    GLContext.setAvailableGLVersionsSet(device);
+                    
+                    if (DEBUG) {
+                      System.err.println(getThreadName() + ": createContextOLD-MapVersionsAvailable HAVE: " + device+" -> "+reqMajor+"."+reqProfile+ " -> "+getGLVersion());
+                    }                    
                 }
             }
         }
@@ -776,7 +789,7 @@ public abstract class GLContextImpl extends GLContext {
   }
 
   /** 
-   * Note: Since context creation is temproary, caller need to issue {@link #resetStates()}, if creation was successful, i.e. returns true.
+   * Note: Since context creation is temporary, caller need to issue {@link #resetStates()}, if creation was successful, i.e. returns true.
    * This method does not reset the states, allowing the caller to utilize the state variables. 
    **/
   private final boolean createContextARBMapVersionsAvailable(int reqMajor, int reqProfile) {
@@ -1034,22 +1047,29 @@ public abstract class GLContextImpl extends GLContext {
     table.reset(getDrawableImpl().getGLDynamicLookupHelper() );
   }
 
-  private final void initGLRendererStrings()  {
+  private final boolean initGLRendererStrings()  {
     final GLDynamicLookupHelper glDynLookupHelper = getDrawableImpl().getGLDynamicLookupHelper();
     final long _glGetString = glDynLookupHelper.dynamicLookupFunction("glGetString");
     if(0 == _glGetString) {
         // FIXME
         System.err.println("Warning: Entry point to 'glGetString' is NULL.");
-        Thread.dumpStack();
+        if(DEBUG) {
+            Thread.dumpStack();
+        }
+        return false;
     } else {
         final String _glRenderer = glGetStringInt(GL.GL_RENDERER, _glGetString);
         if(null == _glRenderer) {
             // FIXME
-            System.err.println("Warning: GL_RENDERER is NULL.");
-            Thread.dumpStack();
+            if(DEBUG) {
+                System.err.println("Warning: GL_RENDERER is NULL.");
+                Thread.dumpStack();
+            }
+            return false;
         } else {
             glRenderer = _glRenderer;
             glRendererLowerCase = glRenderer.toLowerCase();
+            return true;
         }
     }
   }
@@ -1088,17 +1108,20 @@ public abstract class GLContextImpl extends GLContext {
     }
     updateGLXProcAddressTable();
 
-    initGLRendererStrings();
+    final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
+    final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
+    
+    if( !initGLRendererStrings() && DEBUG) {
+        System.err.println("Warning: intialization of GL renderer strings failed. "+adevice+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
+    }
 
     if(!isCurrentContextHardwareRasterizer()) {
         ctxProfileBits |= GLContext.CTX_IMPL_ACCEL_SOFT;
     }
-    final AbstractGraphicsConfiguration aconfig = drawable.getNativeSurface().getGraphicsConfiguration();
-    final AbstractGraphicsDevice adevice = aconfig.getScreen().getDevice();
 
     contextFQN = getContextFQN(adevice, major, minor, ctxProfileBits);
     if (DEBUG) {
-      System.err.println(getThreadName() + ": Context FQN: "+contextFQN+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
+      System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.0 FQN: "+contextFQN+" - "+GLContext.getGLVersion(major, minor, ctxProfileBits, null));
     }
 
     //
@@ -1154,11 +1177,10 @@ public abstract class GLContextImpl extends GLContext {
         }
     }
     
-    if( 0 != ( CTX_PROFILE_ES & ctxProfileBits ) && ctxMajorVersion >= 2 ||
-        isExtensionAvailable(GL_ARB_ES2_compatibility) ) {
+    if( ( 0 != ( CTX_PROFILE_ES & ctxProfileBits ) && major >= 2 ) || isExtensionAvailable(GLExtensions.ARB_ES2_compatibility) ) {
         ctxProfileBits |= CTX_IMPL_ES2_COMPAT;
         ctxProfileBits |= CTX_IMPL_FBO;
-    } else if( hasFBOImpl(ctxMajorVersion, ctxProfileBits, extensionAvailability) ) {
+    } else if( hasFBOImpl(major, ctxProfileBits, extensionAvailability) ) {
         ctxProfileBits |= CTX_IMPL_FBO;
     }
     
@@ -1168,23 +1190,26 @@ public abstract class GLContextImpl extends GLContext {
     setContextVersion(major, minor, ctxProfileBits, true);
 
     setDefaultSwapInterval();
+    
+    if(DEBUG) {
+        System.err.println(getThreadName() + ": GLContext.setGLFuncAvail.X: "+contextFQN+" - "+GLContext.getGLVersion(ctxMajorVersion, ctxMinorVersion, ctxOptions, null));
+    }
   }
   
-  protected static final boolean hasFBOImpl(int ctxMajorVersion, int ctxProfileBits, ExtensionAvailabilityCache extCache) {
-    return ( ctxMajorVersion >= 3 ) ||                                               // any >= 3.0 GL ctx
+  protected static final boolean hasFBOImpl(int major, int ctp, ExtensionAvailabilityCache extCache) {
+    return ( 0 != (ctp & CTX_PROFILE_ES) && major >= 2 ) ||   // ES >= 2.0
             
-           ( 0 != (ctxProfileBits & CTX_PROFILE_ES) && ctxMajorVersion >= 2 ) ||     // ES >= 2.0
+           major >= 3 ||                                                 // any >= 3.0 GL ctx                       
            
            ( null != extCache &&
            
-               ( extCache.isExtensionAvailable(GL_ARB_ES2_compatibility) ) ||        // ES 2.0 compatible
+               extCache.isExtensionAvailable(GLExtensions.ARB_ES2_compatibility)  ||         // ES 2.0 compatible
                
-               ( extCache.isExtensionAvailable(GL_ARB_framebuffer_object) ) ||       // ARB_framebuffer_object
+               extCache.isExtensionAvailable(GLExtensions.ARB_framebuffer_object) ||         // ARB_framebuffer_object
                
-               ( extCache.isExtensionAvailable(GL_EXT_framebuffer_object) &&         // EXT_framebuffer_object*
-                 extCache.isExtensionAvailable(GL_EXT_framebuffer_multisample) &&
-                 extCache.isExtensionAvailable(GL_EXT_framebuffer_blit) &&
-                 extCache.isExtensionAvailable(GL_EXT_packed_depth_stencil) ) );           
+               extCache.isExtensionAvailable(GLExtensions.EXT_framebuffer_object) ||         // EXT_framebuffer_object
+               
+               extCache.isExtensionAvailable(GLExtensions.OES_framebuffer_object) ) ;        // OES_framebuffer_object excluded               
   }
   
   protected final void removeCachedVersion(int major, int minor, int ctxProfileBits) {
@@ -1259,11 +1284,11 @@ public abstract class GLContextImpl extends GLContext {
 
     // dynamic function lookup at last incl name aliasing (not cached)
     DynamicLookupHelper dynLookup = getDrawableImpl().getGLDynamicLookupHelper();
-    String tmpBase = GLExtensionNames.normalizeVEN(GLExtensionNames.normalizeARB(glFunctionName, true), true);
+    String tmpBase = GLNameResolver.normalizeVEN(GLNameResolver.normalizeARB(glFunctionName, true), true);
     long addr = 0;
-    int  variants = GLExtensionNames.getFuncNamePermutationNumber(tmpBase);
+    int  variants = GLNameResolver.getFuncNamePermutationNumber(tmpBase);
     for(int i = 0; 0==addr && i < variants; i++) {
-        String tmp = GLExtensionNames.getFuncNamePermutation(tmpBase, i);
+        String tmp = GLNameResolver.getFuncNamePermutation(tmpBase, i);
         try {
             addr = dynLookup.dynamicLookupFunction(tmp);
         } catch (Exception e) { }
@@ -1317,7 +1342,7 @@ public abstract class GLContextImpl extends GLContext {
 
   protected static String getContextFQN(AbstractGraphicsDevice device, int major, int minor, int ctxProfileBits) {
       // remove non-key values
-      ctxProfileBits &= ~( GLContext.CTX_OPTION_DEBUG | GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ) ;
+      ctxProfileBits &= ~( GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ) ;
 
       return device.getUniqueID() + "-" + toHexString(composeBits(major, minor, ctxProfileBits));
   }
@@ -1372,6 +1397,56 @@ public abstract class GLContextImpl extends GLContext {
   }
 
   //---------------------------------------------------------------------------
+  // Special FBO hook
+  //
+  
+  /**
+   * Tracks {@link GL#GL_FRAMEBUFFER}, {@link GL2GL3#GL_DRAW_FRAMEBUFFER} and {@link GL2GL3#GL_READ_FRAMEBUFFER}
+   * to be returned via {@link #getBoundFramebuffer(int)}.
+   * 
+   * <p>Invoked by {@link GL#glBindFramebuffer(int, int)}. </p>
+   * 
+   * <p>Assumes valid <code>framebufferName</code> range of [0..{@link Integer#MAX_VALUE}]</p> 
+   * 
+   * <p>Does not throw an exception if <code>target</code> is unknown or <code>framebufferName</code> invalid.</p>
+   */
+  public final void setBoundFramebuffer(int target, int framebufferName) {
+      if(0 > framebufferName) {
+          return; // ignore invalid name
+      }
+      switch(target) {
+          case GL.GL_FRAMEBUFFER:
+              boundFBOTarget[0] = framebufferName; // draw
+              boundFBOTarget[1] = framebufferName; // read
+              break;
+          case GL2GL3.GL_DRAW_FRAMEBUFFER:
+              boundFBOTarget[0] = framebufferName; // draw
+              break;
+          case GL2GL3.GL_READ_FRAMEBUFFER:
+              boundFBOTarget[1] = framebufferName; // read
+              break;
+          default: // ignore untracked target
+      }
+  }
+  @Override
+  public final int getBoundFramebuffer(int target) {
+      switch(target) {
+          case GL.GL_FRAMEBUFFER:
+          case GL2GL3.GL_DRAW_FRAMEBUFFER:
+              return boundFBOTarget[0]; // draw
+          case GL2GL3.GL_READ_FRAMEBUFFER:
+              return boundFBOTarget[1]; // read
+          default:
+              throw new InternalError("Invalid FBO target name: "+toHexString(target));
+      }
+  }
+  
+  @Override
+  public final int getDefaultDrawFramebuffer() { return drawable.getDefaultDrawFramebuffer(); }  
+  @Override
+  public final int getDefaultReadFramebuffer() { return drawable.getDefaultReadFramebuffer(); }
+  
+  //---------------------------------------------------------------------------
   // GL_ARB_debug_output, GL_AMD_debug_output helpers
   //
 
diff --git a/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java b/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
index b950c2fdf..0000e6199 100644
--- a/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
+++ b/src/jogl/classes/jogamp/opengl/GLDebugMessageHandler.java
@@ -37,6 +37,8 @@ import javax.media.opengl.GLException;
 
 import com.jogamp.common.os.Platform;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
+import com.jogamp.opengl.GLExtensions;
+
 import jogamp.opengl.gl4.GL4bcProcAddressTable;
 
 /**
@@ -54,12 +56,6 @@ import jogamp.opengl.gl4.GL4bcProcAddressTable;
  * the messages are translated to <i>ARB</i> {@link GLDebugMessage}, using {@link GLDebugMessage#translateAMDEvent(javax.media.opengl.GLContext, long, int, int, int, String)}.</p>
  */
 public class GLDebugMessageHandler {
-    /** Extension <i>GL_ARB_debug_output</i> implementing GLDebugMessage */
-    public static final String GL_ARB_debug_output = "GL_ARB_debug_output".intern();
-    
-    /** Extension <i>GL_AMD_debug_output</i> implementing GLDebugMessage */
-    public static final String GL_AMD_debug_output = "GL_AMD_debug_output".intern();
-    
     private static final boolean DEBUG = Debug.debug("GLDebugMessageHandler");
     
     private static final int EXT_ARB = 1;
@@ -131,11 +127,11 @@ public class GLDebugMessageHandler {
             }
             return;
         }
-        if( ctx.isExtensionAvailable(GL_ARB_debug_output) ) {
-            extName = GL_ARB_debug_output;
+        if( ctx.isExtensionAvailable(GLExtensions.ARB_debug_output) ) {
+            extName = GLExtensions.ARB_debug_output;
             extType = EXT_ARB;
-        } else if( ctx.isExtensionAvailable(GL_AMD_debug_output) ) {
-            extName = GL_AMD_debug_output;
+        } else if( ctx.isExtensionAvailable(GLExtensions.AMD_debug_output) ) {
+            extName = GLExtensions.AMD_debug_output;
             extType = EXT_AMD;
         }
         if(DEBUG) {
@@ -145,6 +141,8 @@ public class GLDebugMessageHandler {
         if(0 == extType) {
             if(DEBUG) {
                 System.err.println("GLDebugMessageHandler: No extension available! "+ctx.getGLVersion());
+                System.err.println("GL_EXTENSIONS  "+ctx.getGLExtensionCount());
+                System.err.println(ctx.getGLExtensionsString());                
             }
             return;
         }
@@ -190,11 +188,11 @@ public class GLDebugMessageHandler {
     }
     
     public final boolean isExtensionARB() {
-        return extName == GL_ARB_debug_output;
+        return extName == GLExtensions.ARB_debug_output;
     }
     
     public final boolean isExtensionAMD() {
-        return extName == GL_AMD_debug_output;
+        return extName == GLExtensions.AMD_debug_output;
     }
     
     /**
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
index e5c44a8d4..f7808294b 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
@@ -1,22 +1,22 @@
 /*
  * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
  * Copyright (c) 2010 JogAmp Community. All rights reserved.
- * 
+ *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
- * 
+ *
  * - Redistribution of source code must retain the above copyright
  *   notice, this list of conditions and the following disclaimer.
- * 
+ *
  * - Redistribution in binary form must reproduce the above copyright
  *   notice, this list of conditions and the following disclaimer in the
  *   documentation and/or other materials provided with the distribution.
- * 
+ *
  * Neither the name of Sun Microsystems, Inc. or the names of
  * contributors may be used to endorse or promote products derived from
  * this software without specific prior written permission.
- * 
+ *
  * This software is provided "AS IS," without a warranty of any kind. ALL
  * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
  * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
@@ -29,11 +29,11 @@
  * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
  * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
  * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- * 
+ *
  * You acknowledge that this software is not designed or intended for use
  * in the design, construction, operation or maintenance of any nuclear
  * facility.
- * 
+ *
  * Sun gratefully acknowledges that this software was originally authored
  * and developed by Kenneth Bradley Russell and Christopher John Kline.
  */
@@ -47,7 +47,8 @@ import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.OffscreenLayerSurface;
 import javax.media.nativewindow.ProxySurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.nativewindow.ProxySurface.UpstreamSurfaceHook;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
@@ -88,7 +89,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
       return null;
   }
   protected abstract GLContext getOrCreateSharedContextImpl(AbstractGraphicsDevice device);
-  
+
   /**
    * Returns the shared device mapped to the <code>device</code> {@link AbstractGraphicsDevice#getConnection()},
    * either a preexisting or newly created, or <code>null</code> if creation failed or not supported.<br>
@@ -115,7 +116,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   }
   protected abstract AbstractGraphicsDevice getOrCreateSharedDeviceImpl(AbstractGraphicsDevice device);
 
-  /** 
+  /**
    * Returns the GLDynamicLookupHelper
    * @param profile if EGL/ES, profile <code>1</code> refers to ES1 and <code>2</code> to ES2,
    *        otherwise the profile is ignored.
@@ -125,6 +126,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   //---------------------------------------------------------------------------
   // Dispatching GLDrawable construction in respect to the NativeSurface Capabilities
   //
+  @Override
   public GLDrawable createGLDrawable(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
@@ -132,23 +134,38 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
     final MutableGraphicsConfiguration config = (MutableGraphicsConfiguration) target.getGraphicsConfiguration();
     final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
     final AbstractGraphicsDevice adevice = config.getScreen().getDevice();
+    final boolean isFBOAvailable = GLContext.isFBOAvailable(adevice, chosenCaps.getGLProfile());
     GLDrawable result = null;
     adevice.lock();
     try {
         final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(target, true);
         if(null != ols) {
-            // layered surface -> Offscreen/PBuffer
+            // layered surface -> Offscreen/[FBO|PBuffer]
             final GLCapabilities chosenCapsMod = (GLCapabilities) chosenCaps.cloneMutable();
             chosenCapsMod.setOnscreen(false);
-            chosenCapsMod.setPBuffer(canCreateGLPbuffer(adevice));
+            /* if( isFBOAvailable ) { // FIXME JAU: FBO n/a yet
+                chosenCapsMod.setFBO(true);
+            } else */ 
+            if( canCreateGLPbuffer(adevice) ) {
+                chosenCapsMod.setPBuffer(true);
+            } else {
+                chosenCapsMod.setFBO(false);
+                chosenCapsMod.setPBuffer(false);
+            }
             config.setChosenCapabilities(chosenCapsMod);
             if(DEBUG) {
                 System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable -> Offscreen-Layer: "+target);
             }
-            if( ! ( target instanceof SurfaceChangeable ) ) {
+            if( ! ( target instanceof MutableSurface ) ) {
                 throw new IllegalArgumentException("Passed NativeSurface must implement SurfaceChangeable for offscreen layered surface: "+target);
+            }            
+            if( ((GLCapabilitiesImmutable)config.getRequestedCapabilities()).isFBO() && isFBOAvailable ) {
+                // FIXME JAU: Need to revise passed MutableSurface to work w/ FBO ..
+                final GLDrawableImpl dummyDrawable = createOnscreenDrawableImpl(target);                
+                result = new GLFBODrawableImpl(this, dummyDrawable, target, target.getWidth(), target.getHeight(), 0 /* textureUnit */);
+            } else {            
+                result = createOffscreenDrawableImpl(target);
             }
-            result = createOffscreenDrawableImpl(target);            
         } else if(chosenCaps.isOnscreen()) {
             // onscreen
             if(DEBUG) {
@@ -158,12 +175,18 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
         } else {
             // offscreen
             if(DEBUG) {
-                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OffScreenDrawable (PBuffer: "+chosenCaps.isPBuffer()+"): "+target);
+                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OffScreenDrawable, FBO-chosen(-avail)/PBuffer: "+chosenCaps.isFBO()+"("+isFBOAvailable+")/"+chosenCaps.isPBuffer()+": "+target);
             }
-            if( ! ( target instanceof SurfaceChangeable ) ) {
+            if( ! ( target instanceof MutableSurface ) ) {
                 throw new IllegalArgumentException("Passed NativeSurface must implement SurfaceChangeable for offscreen: "+target);
             }
-            result = createOffscreenDrawableImpl(target);
+            if( ((GLCapabilitiesImmutable)config.getRequestedCapabilities()).isFBO() && isFBOAvailable ) {
+                // FIXME JAU: Need to revise passed MutableSurface to work w/ FBO ..
+                final GLDrawableImpl dummyDrawable = createOnscreenDrawableImpl(target);                
+                result = new GLFBODrawableImpl(this, dummyDrawable, target, target.getWidth(), target.getHeight(), 0 /* textureUnit */);
+            } else {
+                result = createOffscreenDrawableImpl(target);
+            }
         }
     } finally {
         adevice.unlock();
@@ -176,43 +199,42 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
 
   //---------------------------------------------------------------------------
   //
-  // Onscreen GLDrawable construction 
+  // Onscreen GLDrawable construction
   //
 
   protected abstract GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target);
 
   //---------------------------------------------------------------------------
   //
-  // PBuffer Offscreen GLDrawable construction 
+  // PBuffer Offscreen GLDrawable construction
   //
-
+  
+  @Override
   public abstract boolean canCreateGLPbuffer(AbstractGraphicsDevice device);
 
+  @Override
   public GLPbuffer createGLPbuffer(AbstractGraphicsDevice deviceReq,
                                    GLCapabilitiesImmutable capsRequested,
                                    GLCapabilitiesChooser chooser,
                                    int width,
                                    int height,
                                    GLContext shareWith) {
-    if(height<=0 || height<=0) {
-        throw new GLException("Width and height of pbuffer must be positive (were (" +
-                        width + ", " + height + "))");
+    if(width<=0 || height<=0) {
+        throw new GLException("initial size must be positive (were (" + width + " x " + height + "))");
     }
-
     AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
         throw new GLException("No shared device for requested: "+deviceReq);
     }
-
-    if (!canCreateGLPbuffer(device)) {
-        throw new GLException("Pbuffer support not available with device: "+device);
+    if ( !canCreateGLPbuffer(device) ) {
+        throw new GLException("Pbuffer not available with device: "+device);
     }
-    
-    GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixGLPBufferGLCapabilities(capsRequested);
+
+    final GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixGLPBufferGLCapabilities(capsRequested);
     GLDrawableImpl drawable = null;
     device.lock();
     try {
-        drawable = (GLDrawableImpl) createGLDrawable( createOffscreenSurfaceImpl(device, capsChosen, capsRequested, chooser, width, height) );
+        drawable = (GLDrawableImpl) createGLDrawable( createMutableSurfaceImpl(device, true, capsChosen, capsRequested, chooser, width, height, null) );
         if(null != drawable) {
             drawable.setRealized(true);
         }
@@ -223,80 +245,163 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
     if(null==drawable) {
         throw new GLException("Could not create Pbuffer drawable for: "+device+", "+capsChosen+", "+width+"x"+height);
     }
-    return new GLPbufferImpl( drawable, shareWith);
+    return new GLPbufferImpl( drawable, shareWith, true);
   }
 
   //---------------------------------------------------------------------------
   //
-  // Offscreen GLDrawable construction 
+  // Offscreen GLDrawable construction
   //
 
-  protected abstract GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) ;
-
+  @Override
   public GLDrawable createOffscreenDrawable(AbstractGraphicsDevice deviceReq,
                                             GLCapabilitiesImmutable capsRequested,
                                             GLCapabilitiesChooser chooser,
-                                            int width,
-                                            int height) {
+                                            int width, int height) {
     if(width<=0 || height<=0) {
-        throw new GLException("Width and height of pbuffer must be positive (were (" +
-                        width + ", " + height + "))");
+        throw new GLException("initial size must be positive (were (" + width + " x " + height + "))");
     }
-    AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
+    final AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
         throw new GLException("No shared device for requested: "+deviceReq);
     }
-    GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixOffScreenGLCapabilities(capsRequested, canCreateGLPbuffer(deviceReq));
-
+    
+    if( capsRequested.isFBO() && GLContext.isFBOAvailable(device, capsRequested.getGLProfile()) ) {
+        device.lock();
+        try {
+            return createFBODrawableImpl(device, capsRequested, chooser, width, height);
+        } finally {
+            device.unlock();
+        }
+    }
+    
+    final GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixOffscreenGLCapabilities(capsRequested, false, canCreateGLPbuffer(device));
     device.lock();
     try {
-        return createGLDrawable( createOffscreenSurfaceImpl(device, capsChosen, capsRequested, chooser, width, height) );
+        return createOffscreenDrawableImpl( createMutableSurfaceImpl(device, true, capsChosen, capsRequested, chooser, width, height, null) );
     } finally {
         device.unlock();
     }
   }
 
-  public NativeSurface createOffscreenSurface(AbstractGraphicsDevice deviceReq,
-                                              GLCapabilitiesImmutable capsRequested,
-                                              GLCapabilitiesChooser chooser,
-                                              int width, int height) {
-    AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
+  /** Creates a platform independent offscreen FBO GLDrawable implementation */  
+  protected GLDrawable createFBODrawableImpl(AbstractGraphicsDevice device, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, 
+                                            int initialWidth, int initialHeight) {    
+    final GLCapabilitiesImmutable dummyCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(requestedCaps);
+    final NativeSurface dummySurface = createDummySurfaceImpl(device, true, dummyCaps, null, 64, 64);
+    final GLDrawableImpl dummyDrawable = createOnscreenDrawableImpl(dummySurface);
+    
+    return new GLFBODrawableImpl(this, dummyDrawable, dummySurface, initialWidth, initialHeight, 0 /* textureUnit */);
+  }
+  
+  /** Creates a platform dependent offscreen pbuffer/pixmap GLDrawable implementation */  
+  protected abstract GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) ;
+
+  /**
+   * Creates a mutable {@link ProxySurface} w/o defined surface handle.
+   * <p>
+   * It's {@link AbstractGraphicsConfiguration} is properly set according to the given {@link GLCapabilitiesImmutable}.
+   * </p>
+   * <p>
+   * Lifecycle (destruction) of the TBD surface handle shall be handled by the caller.
+   * </p>
+   * @param device a valid platform dependent target device.
+   * @param createNewDevice if <code>true</code> a new device instance is created using <code>device</code> details,
+   *                        otherwise <code>device</code> instance is used as-is.
+   * @param capsChosen
+   * @param capsRequested
+   * @param chooser the custom chooser, may be null for default
+   * @param width the initial width
+   * @param height the initial height
+   * @param lifecycleHook optional control of the surface's lifecycle 
+   * @return the created {@link MutableSurface} instance w/o defined surface handle
+   */
+  protected abstract ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice device, boolean createNewDevice, 
+                                                           GLCapabilitiesImmutable capsChosen,
+                                                           GLCapabilitiesImmutable capsRequested,
+                                                           GLCapabilitiesChooser chooser, int width, int height, UpstreamSurfaceHook lifecycleHook);
+
+  /**
+   * A dummy surface is not visible on screen and will not be used to render directly to,
+   * it maybe on- or offscreen.
+   * <p>
+   * It is used to allow the creation of a {@link GLDrawable} and {@link GLContext} to query information.
+   * It also allows creation of framebuffer objects which are used for rendering.
+   * </p>
+   * @param deviceReq which {@link javax.media.nativewindow.AbstractGraphicsDevice#getConnection() connection} denotes the shared device to be used, may be <code>null</code> for the platform's default device.
+   * @param requestedCaps
+   * @param chooser the custom chooser, may be null for default
+   * @param width the initial width
+   * @param height the initial height
+   *
+   * @return the created {@link MutableSurface} instance w/o defined surface handle
+   */
+  public NativeSurface createDummySurface(AbstractGraphicsDevice deviceReq, GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser,
+                                          int width, int height) {
+    final AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
         throw new GLException("No shared device for requested: "+deviceReq);
     }
-    GLCapabilitiesImmutable capsChosen = GLGraphicsConfigurationUtil.fixOffScreenGLCapabilities(capsRequested, canCreateGLPbuffer(deviceReq));
-
     device.lock();
     try {
-        return createOffscreenSurfaceImpl(device, capsChosen, capsRequested, chooser, width, height);
+        return createDummySurfaceImpl(device, true, requestedCaps, chooser, width, height);
     } finally {
         device.unlock();
     }
   }
-
+  
   /**
-   * creates an offscreen NativeSurface, which must implement SurfaceChangeable as well,
-   * so the windowing system related implementation is able to set the surface handle.
+   * A dummy surface is not visible on screen and will not be used to render directly to,
+   * it maybe on- or offscreen.
+   * <p>
+   * It is used to allow the creation of a {@link GLDrawable} and {@link GLContext} to query information.
+   * It also allows creation of framebuffer objects which are used for rendering.
+   * </p>
+   * @param device a valid platform dependent target device.
+   * @param createNewDevice if <code>true</code> a new device instance is created using <code>device</code> details,
+   *                        otherwise <code>device</code> instance is used as-is.
+   * @param requestedCaps
+   * @param chooser the custom chooser, may be null for default
+   * @param width the initial width
+   * @param height the initial height
+   * @return the created {@link MutableSurface} instance w/o defined surface handle
    */
-  protected abstract NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device,
-                                                              GLCapabilitiesImmutable capabilities, GLCapabilitiesImmutable capsRequested,
-                                                              GLCapabilitiesChooser chooser,
-                                                              int width, int height);
+  public abstract ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice device, boolean createNewDevice, 
+                                                      GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height);
 
-  public ProxySurface createProxySurface(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
+  //---------------------------------------------------------------------------
+  //
+  // ProxySurface (Wrapped pre-existing native surface) construction
+  //
+  
+  @Override
+  public ProxySurface createProxySurface(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, 
+                                         GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final AbstractGraphicsDevice device = getOrCreateSharedDevice(deviceReq);
     if(null == device) {
-        throw new GLException("No shared device for requested: "+device);
+        throw new GLException("No shared device for requested: "+deviceReq);
+    }
+    if(0 == windowHandle) {
+        throw new IllegalArgumentException("Null windowHandle");
     }
 
     device.lock();
     try {
-        return createProxySurfaceImpl(device, windowHandle, capsRequested, chooser);
+        return createProxySurfaceImpl(device, screenIdx, windowHandle, capsRequested, chooser, upstream);
     } finally {
         device.unlock();
     }
-  }  
-  
-  protected abstract ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice device, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser);
+  }
+
+  /**
+   * Creates a {@link ProxySurface} with a set surface handle.
+   * <p>
+   * Implementation is also required to allocate it's own {@link AbstractGraphicsDevice} instance.
+   * </p>
+ * @param upstream TODO
+   */
+  protected abstract ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, 
+                                                         GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream);
 
   //---------------------------------------------------------------------------
   //
@@ -304,7 +409,8 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   //
 
   protected abstract GLContext createExternalGLContextImpl();
-  
+
+  @Override
   public GLContext createExternalGLContext() {
     NativeWindowFactory.getDefaultToolkitLock().lock();
     try {
@@ -316,6 +422,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
 
   protected abstract GLDrawable createExternalGLDrawableImpl();
 
+  @Override
   public GLDrawable createExternalGLDrawable() {
     NativeWindowFactory.getDefaultToolkitLock().lock();
     try {
@@ -398,7 +505,7 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
    * normal ahead of time, use resetDisplayGamma(). Throws
    * IllegalArgumentException if any of the parameters were
    * out-of-bounds.
-   * 
+   *
    * @param gamma The gamma value, typically > 1.0 (default value is
    *   1.0)
    * @param brightness The brightness value between -1.0 and 1.0,
@@ -484,7 +591,8 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
       return;
     if (gammaShutdownHook == null) {
       gammaShutdownHook = new Thread(new Runnable() {
-          public void run() {
+          @Override
+        public void run() {
             synchronized (GLDrawableFactoryImpl.this) {
               resetGammaRamp(originalGammaRamp);
             }
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
index 0c01aa676..090c5fe69 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
@@ -189,8 +189,9 @@ public class GLDrawableHelper {
    */
   public final void dispose(GLAutoDrawable drawable) {
     synchronized(listenersLock) {
-        for (int i=0; i < listeners.size(); i++) {
-          listeners.get(i).dispose(drawable);
+        final ArrayList<GLEventListener> _listeners = listeners;
+        for (int i=0; i < _listeners.size(); i++) {
+          _listeners.get(i).dispose(drawable);
         }
     }
   }
@@ -209,8 +210,9 @@ public class GLDrawableHelper {
   /** The default init action to be called once after ctx is being created @ 1st makeCurrent(). */
   public final void init(GLAutoDrawable drawable) {
     synchronized(listenersLock) {
-        for (int i=0; i < listeners.size(); i++) {
-          final GLEventListener listener = listeners.get(i) ;
+        final ArrayList<GLEventListener> _listeners = listeners;
+        for (int i=0; i < _listeners.size(); i++) {
+          final GLEventListener listener = _listeners.get(i) ;
 
           // If make current ctx, invoked by invokGL(..), results in a new ctx, init gets called.
           // This may happen not just for initial setup, but for ctx recreation due to resource change (drawable/window),
@@ -232,8 +234,9 @@ public class GLDrawableHelper {
   }
   private final void displayImpl(GLAutoDrawable drawable) {
       synchronized(listenersLock) {
-          for (int i=0; i < listeners.size(); i++) {
-            final GLEventListener listener = listeners.get(i) ;
+          final ArrayList<GLEventListener> _listeners = listeners;
+          for (int i=0; i < _listeners.size(); i++) {
+            final GLEventListener listener = _listeners.get(i) ;
             // GLEventListener may need to be init, 
             // in case this one is added after the realization of the GLAutoDrawable
             init( listener, drawable, true /* sendReshape */) ; 
@@ -324,7 +327,7 @@ public class GLDrawableHelper {
     }
   }
 
-  public final boolean isExternalAnimatorRunning() {
+  public final boolean isAnimatorRunningOnOtherThread() {
     return ( null != animatorCtrl ) ? animatorCtrl.isStarted() && animatorCtrl.getThread() != Thread.currentThread() : false ;
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
index 58a4ac6b4..abf2bf557 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableImpl.java
@@ -42,6 +42,7 @@ package jogamp.opengl;
 
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.ProxySurface;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
@@ -75,7 +76,7 @@ public abstract class GLDrawableImpl implements GLDrawable {
     if( !realized ) {
         return; // destroyed already
     }
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)surface.getGraphicsConfiguration().getChosenCapabilities();
+    final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)surface.getGraphicsConfiguration().getChosenCapabilities();
     if ( caps.getDoubleBuffered() ) {
         if(!surface.surfaceSwap()) {
             int lockRes = lockSurface(); // it's recursive, so it's ok within [makeCurrent .. release]
@@ -149,6 +150,9 @@ public abstract class GLDrawableImpl implements GLDrawable {
         realized = realizedArg;
         AbstractGraphicsDevice aDevice = surface.getGraphicsConfiguration().getScreen().getDevice();
         if(realizedArg) {
+            if(surface instanceof ProxySurface) {
+                ((ProxySurface)surface).createNotify();
+            }
             if(NativeSurface.LOCK_SURFACE_NOT_READY >= lockSurface()) {
                 throw new GLException("GLDrawableImpl.setRealized(true): Surface not ready (lockSurface)");
             }
@@ -156,17 +160,21 @@ public abstract class GLDrawableImpl implements GLDrawable {
             aDevice.lock();
         }
         try {
-            setRealizedImpl();
             if(realizedArg) {
+                setRealizedImpl();
                 updateHandle();
             } else {
                 destroyHandle();
+                setRealizedImpl();
             }
         } finally {
             if(realizedArg) {
                 unlockSurface();
             } else {
                 aDevice.unlock();
+                if(surface instanceof ProxySurface) {
+                    ((ProxySurface)surface).destroyNotify();
+                }
             }
         }
     } else if(DEBUG) {
@@ -175,6 +183,39 @@ public abstract class GLDrawableImpl implements GLDrawable {
   }
   protected abstract void setRealizedImpl();
 
+  /** 
+   * Callback for special implementations, allowing GLContext to trigger GL related lifecycle: <code>construct</code>, <code>destroy</code>.
+   * <p>
+   * If <code>realized</code> is <code>true</code>, the context has just been created and made current.
+   * </p>
+   * <p>
+   * If <code>realized</code> is <code>false</code>, the context is still current and will be release and destroyed after this method returns.
+   * </p>
+   * <p>
+   * @see #contextMadeCurrent(GLContext, boolean)
+   */
+  protected void contextRealized(GLContext glc, boolean realized) {}
+  
+  /** 
+   * Callback for special implementations, allowing GLContext to trigger GL related lifecycle: <code>makeCurrent</code>, <code>release</code>.
+   * <p>
+   * Will not be called if {@link #contextRealized(GLContext, boolean)} has been triggered.
+   * </p>
+   * <p>
+   * If <code>current</code> is <code>true</code>, the context has just been made current.
+   * </p>
+   * <p>
+   * If <code>current</code> is <code>false</code>, the context is still current and will be release after this method returns.
+   * </p>
+   * @see #contextRealized(GLContext, boolean)
+   */ 
+  protected void contextMadeCurrent(GLContext glc, boolean current) { }
+
+  /** Callback for special implementations, allowing GLContext to fetch a custom default render framebuffer. Defaults to zero.*/
+  protected int getDefaultDrawFramebuffer() { return 0; }
+  /** Callback for special implementations, allowing GLContext to fetch a custom default read framebuffer. Defaults to zero. */
+  protected int getDefaultReadFramebuffer() { return 0; }
+  
   @Override
   public final synchronized boolean isRealized() {
     return realized;
@@ -190,10 +231,12 @@ public abstract class GLDrawableImpl implements GLDrawable {
     return surface.getHeight();
   }
 
+  /** @see NativeSurface#lockSurface() */
   public final int lockSurface() throws GLException {
     return surface.lockSurface();
   }
 
+  /** @see NativeSurface#unlockSurface() */
   public final void unlockSurface() {
     surface.unlockSurface();
   }
diff --git a/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
new file mode 100644
index 000000000..b7ea4f826
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
@@ -0,0 +1,138 @@
+package jogamp.opengl;
+
+import javax.media.nativewindow.NativeSurface;
+import javax.media.opengl.GL;
+import javax.media.opengl.GL2GL3;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLException;
+
+import com.jogamp.nativewindow.MutableGraphicsConfiguration;
+import com.jogamp.opengl.FBObject;
+import com.jogamp.opengl.FBObject.Attachment;
+import com.jogamp.opengl.FBObject.TextureAttachment;
+
+/**
+ * Offscreen GLDrawable implementation using framebuffer object (FBO)
+ * as it's offscreen rendering mechanism.
+ * 
+ * @see GLDrawableImpl#contextRealized(GLContext, boolean)
+ * @see GLDrawableImpl#contextMadeCurrent(GLContext, boolean)
+ * @see GLDrawableImpl#getDefaultDrawFramebuffer()
+ * @see GLDrawableImpl#getDefaultReadFramebuffer()
+ */
+public class GLFBODrawableImpl extends GLDrawableImpl {
+    final GLDrawableImpl parent;
+    final FBObject fbo;
+    int texUnit;
+    int samplesTexUnit = 0;
+    int width=0, height=0, samples=0;
+    
+    protected GLFBODrawableImpl(GLDrawableFactoryImpl factory, GLDrawableImpl parent, 
+                                NativeSurface surface, int initialWidth, int initialHeight, int textureUnit) {
+        super(factory, surface, false);
+        this.parent = parent;
+        this.texUnit = textureUnit;
+        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getChosenCapabilities();
+        this.width = initialWidth;
+        this.height = initialHeight;
+        this.samples = caps.getNumSamples();
+        this.fbo = new FBObject();
+    }
+    
+    @Override
+    protected void contextRealized(GLContext glc, boolean realized) {
+        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) surface.getGraphicsConfiguration().getChosenCapabilities();
+        final GL gl = glc.getGL();
+        if(realized) {                   
+            fbo.reset(gl, width, height, samples);
+            samples = fbo.getNumSamples(); // update, maybe capped
+            if(samples > 0) {
+                fbo.attachColorbuffer(gl, 0, caps.getAlphaBits()>0);
+            } else {
+                fbo.attachTexture2D(gl, 0, caps.getAlphaBits()>0);
+            }
+            if( caps.getStencilBits() > 0 ) {
+                fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH_STENCIL, 24);
+            } else {
+                fbo.attachRenderbuffer(gl, Attachment.Type.DEPTH, 24);
+            }
+        } else if(null != fbo) {
+            fbo.destroy(gl);
+        }
+    }
+    
+    @Override
+    protected void contextMadeCurrent(GLContext glc, boolean current) {
+        final GL gl = glc.getGL();
+        if(current) {
+            fbo.bind(gl);
+        } else {
+            fbo.unbind(gl);
+            gl.glActiveTexture(GL.GL_TEXTURE0 + texUnit);
+            fbo.use(gl, samples > 0 ? fbo.getSamplingSink() : (TextureAttachment) fbo.getColorbuffer(0) );
+            if( samples > 0) {
+                gl.glBindFramebuffer(GL2GL3.GL_READ_FRAMEBUFFER, fbo.getReadFramebuffer());
+            }
+        }
+    }
+    
+    @Override
+    protected int getDefaultDrawFramebuffer() { return fbo.getWriteFramebuffer(); }
+    
+    @Override
+    protected int getDefaultReadFramebuffer() { return fbo.getReadFramebuffer(); }
+    
+    public FBObject getFBObject() { return fbo; }
+    
+    public void setSize(GL gl, int newWidth, int newHeight) throws GLException {
+        width = newWidth;
+        height = newHeight;        
+        fbo.reset(gl, width, height, samples);
+        samples = fbo.getNumSamples(); // update, maybe capped
+    }
+    
+    public void setSamples(GL gl, int newSamples) throws GLException {
+        samples = newSamples;
+        fbo.reset(gl, width, height, samples);
+        samples = fbo.getNumSamples(); // update, maybe capped
+    }
+    
+    
+    @Override
+    public GLContext createContext(GLContext shareWith) {
+        final GLContext ctx = parent.createContext(shareWith);
+        ctx.setGLDrawable(this, false);
+        return ctx;
+    }
+
+    @Override
+    public GLDynamicLookupHelper getGLDynamicLookupHelper() {
+        return parent.getGLDynamicLookupHelper();
+    }
+
+    @Override
+    protected void swapBuffersImpl() {
+    }
+
+    @Override
+    protected void setRealizedImpl() {
+        parent.setRealized(realized);
+        if(realized) {    
+            final MutableGraphicsConfiguration msConfig = (MutableGraphicsConfiguration) surface.getGraphicsConfiguration();
+            final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) msConfig.getChosenCapabilities();
+            final GLCapabilitiesImmutable chosenFBOCaps = GLGraphicsConfigurationUtil.fixOffscreenGLCapabilities(chosenCaps, true /*FBO*/, false /*PBO*/);    
+            msConfig.setChosenCapabilities(chosenFBOCaps);
+        }
+    }
+
+    @Override
+    public int getWidth() {
+        return width;
+    }
+
+    @Override
+    public int getHeight() {
+        return height;
+    }    
+}
diff --git a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
index b7c15bfda..3f38f33bc 100644
--- a/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
+++ b/src/jogl/classes/jogamp/opengl/GLGraphicsConfigurationUtil.java
@@ -38,7 +38,8 @@ public class GLGraphicsConfigurationUtil {
     public static final int WINDOW_BIT  = 1 << 0;
     public static final int BITMAP_BIT  = 1 << 1;
     public static final int PBUFFER_BIT = 1 << 2;
-    public static final int ALL_BITS    = WINDOW_BIT | BITMAP_BIT | PBUFFER_BIT ;
+    public static final int FBO_BIT     = 1 << 3;
+    public static final int ALL_BITS    = WINDOW_BIT | BITMAP_BIT | PBUFFER_BIT | FBO_BIT ;
 
     public static final StringBuilder winAttributeBits2String(StringBuilder sb, int winattrbits) {
         if(null==sb) {
@@ -61,30 +62,43 @@ public class GLGraphicsConfigurationUtil {
                 sb.append(", ");
             }
             sb.append("PBUFFER");
+            seperator=true;
+        }
+        if( 0 != ( FBO_BIT & winattrbits )  )  {
+            if(seperator) {
+                sb.append(", ");
+            }
+            sb.append("FBO");
         }
         return sb;
     }
 
     /**
+     * @param isFBO TODO
      * @return bitmask representing the input boolean in exclusive or logic, ie only one bit will be set
      */
-    public static final int getWinAttributeBits(boolean isOnscreen, boolean isPBuffer) {
+    public static final int getWinAttributeBits(boolean isOnscreen, boolean isPBuffer, boolean isFBO) {
         int winattrbits = 0;
         if(isOnscreen) {
             winattrbits |= WINDOW_BIT;
-        } else if (!isPBuffer) {
-            winattrbits |= BITMAP_BIT;
         } else {
-            winattrbits |= PBUFFER_BIT;
+            if(isFBO) {
+                winattrbits |= FBO_BIT;
+            }
+            if (!isPBuffer) {
+                winattrbits |= BITMAP_BIT;
+            } else {
+                winattrbits |= PBUFFER_BIT;
+            }
         }
         return winattrbits;
     }
 
     /**
-     * @see #getWinAttributeBits(boolean, boolean)
+     * @see #getWinAttributeBits(boolean, boolean, boolean)
      */
     public static final int getWinAttributeBits(GLCapabilitiesImmutable caps) {
-        return getWinAttributeBits(caps.isOnscreen(), caps.isPBuffer());
+        return getWinAttributeBits(caps.isOnscreen(), caps.isPBuffer(), false);
     }
 
     public static final boolean addGLCapabilitiesPermutations(List<GLCapabilitiesImmutable> capsBucket, GLCapabilitiesImmutable temp, int winattrbits) {
@@ -92,43 +106,58 @@ public class GLGraphicsConfigurationUtil {
         if( 0 != ( WINDOW_BIT & winattrbits )  )  {
             GLCapabilities cpy  = (GLCapabilities) temp.cloneMutable();
             cpy.setOnscreen(true);
+            cpy.setPBuffer(false);
+            cpy.setFBO(false);
             capsBucket.add(cpy);
         }
-        if( 0 != ( PBUFFER_BIT & winattrbits )  )  {
+        if( 0 != ( PBUFFER_BIT & winattrbits ) || 0 != ( FBO_BIT & winattrbits )  )  {
             GLCapabilities cpy  = (GLCapabilities) temp.cloneMutable();
-            cpy.setPBuffer(true);
+            cpy.setFBO(0 != ( FBO_BIT & winattrbits ));
+            cpy.setPBuffer(0 != ( PBUFFER_BIT & winattrbits ));
             capsBucket.add(cpy);
         }
         if( 0 != ( BITMAP_BIT & winattrbits )  )  {
             GLCapabilities cpy  = (GLCapabilities) temp.cloneMutable();
             cpy.setOnscreen(false);
             cpy.setPBuffer(false);
+            cpy.setFBO(false);
             capsBucket.add(cpy);
         }
         return capsBucket.size() > preSize;
     }
 
-    public static GLCapabilitiesImmutable fixGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean pbufferAvailable)
+    public static GLCapabilitiesImmutable fixGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean fboAvailable, boolean pbufferAvailable)
     {
         if( !capsRequested.isOnscreen() ) {
-            return fixOffScreenGLCapabilities(capsRequested, pbufferAvailable);
+            return fixOffscreenGLCapabilities(capsRequested, fboAvailable, pbufferAvailable);
         }
-        return capsRequested;
+        return fixOnscreenGLCapabilities(capsRequested);
     }
 
-    public static GLCapabilitiesImmutable fixOffScreenGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean pbufferAvailable)
+    public static GLCapabilitiesImmutable fixOnscreenGLCapabilities(GLCapabilitiesImmutable capsRequested)
+    {
+        if( !capsRequested.isOnscreen() ) {
+            // fix caps ..
+            GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
+            caps2.setOnscreen(true);
+            return caps2;
+        }
+        return capsRequested;
+    }
+    
+    public static GLCapabilitiesImmutable fixOffscreenGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean fboAvailable, boolean pbufferAvailable)
     {
         if( capsRequested.getDoubleBuffered() ||
             capsRequested.isOnscreen() ||
-            ( !pbufferAvailable && capsRequested.isPBuffer() ) )
+            ( fboAvailable != capsRequested.isFBO() ) || 
+            ( pbufferAvailable != capsRequested.isPBuffer() ) )
         {
             // fix caps ..
             GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
             caps2.setDoubleBuffered(false); // FIXME DBLBUFOFFSCRN
             caps2.setOnscreen(false);
-            if(caps2.isPBuffer() && !pbufferAvailable) {
-                caps2.setPBuffer(false);
-            }
+            caps2.setFBO( fboAvailable ); 
+            caps2.setPBuffer( pbufferAvailable );
             return caps2;
         }
         return capsRequested;
@@ -136,25 +165,28 @@ public class GLGraphicsConfigurationUtil {
 
     public static GLCapabilitiesImmutable fixGLPBufferGLCapabilities(GLCapabilitiesImmutable capsRequested)
     {
-        if( capsRequested.getDoubleBuffered() || capsRequested.isOnscreen() || !capsRequested.isPBuffer()) {
+        if( capsRequested.getDoubleBuffered() || capsRequested.isOnscreen() || !capsRequested.isPBuffer() || capsRequested.isFBO() ) {
             // fix caps ..
             GLCapabilities caps2 = (GLCapabilities) capsRequested.cloneMutable();
             caps2.setDoubleBuffered(false); // FIXME DBLBUFOFFSCRN - we don't need to be single buffered ..
             caps2.setOnscreen(false);
             caps2.setPBuffer(true);
+            caps2.setFBO(false);
             return caps2;
         }
         return capsRequested;
     }
 
+    /** Fix opaque setting while preserve alpha bits */
     public static GLCapabilitiesImmutable fixOpaqueGLCapabilities(GLCapabilitiesImmutable capsRequested, boolean isOpaque)
     {
         GLCapabilities caps2 = null;
         
         if( capsRequested.isBackgroundOpaque() != isOpaque) {
-            // fix caps ..
+            final int alphaBits = capsRequested.getAlphaBits();
             caps2 = (GLCapabilities) capsRequested.cloneMutable();
             caps2.setBackgroundOpaque(isOpaque);
+            caps2.setAlphaBits(alphaBits);
             return caps2;
         }
         return capsRequested;
diff --git a/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java b/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java
index a8277fd71..32f4cb696 100644
--- a/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLPbufferImpl.java
@@ -42,10 +42,14 @@ package jogamp.opengl;
 
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLPbuffer;
 
+import com.jogamp.common.util.locks.LockFactory;
+import com.jogamp.common.util.locks.RecursiveLock;
+
 /** Platform-independent class exposing pbuffer functionality to
     applications. This class is not exposed in the public API as it
     would probably add no value; however it implements the GLDrawable
@@ -54,9 +58,8 @@ import javax.media.opengl.GLPbuffer;
 public class GLPbufferImpl extends GLAutoDrawableBase implements GLPbuffer {
   private int floatMode;
 
-  public GLPbufferImpl(GLDrawableImpl pbufferDrawable,
-                       GLContext sharedContext) {
-    super(pbufferDrawable, null); // drawable := pbufferDrawable 
+  public GLPbufferImpl(GLDrawableImpl pbufferDrawable, GLContext sharedContext, boolean ownDevice) {
+    super(pbufferDrawable, null, ownDevice); // drawable := pbufferDrawable 
     
     GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable)
          drawable.getNativeSurface().getGraphicsConfiguration().getChosenCapabilities();
@@ -102,7 +105,7 @@ public class GLPbufferImpl extends GLAutoDrawableBase implements GLPbuffer {
   //
   // GLDrawable delegation
   // 
-  
+    
   @Override
   public final void setRealized(boolean realized) {
   }
@@ -110,10 +113,19 @@ public class GLPbufferImpl extends GLAutoDrawableBase implements GLPbuffer {
   //
   // GLAutoDrawable completion
   //
+  private final RecursiveLock lock = LockFactory.createRecursiveLock();  // instance wide lock
+  
+  @Override
+  protected final RecursiveLock getLock() { return lock; }
+  
+  @Override
+  public final Object getUpstreamWidget() {
+    return null;
+  }
   
   @Override
   public void destroy() {
-    defaultDestroyOp();
+    defaultDestroy();
   }
 
   @Override
@@ -122,12 +134,23 @@ public class GLPbufferImpl extends GLAutoDrawableBase implements GLPbuffer {
   }
 
   @Override
-  public void display() {
-    if( null != drawable && drawable.isRealized() && null != context ) {
-      helper.invokeGL(drawable, context, defaultDisplayAction, initAction);
+  public final void display() {
+    final RecursiveLock _lock = lock;        
+    _lock.lock(); // sync: context/drawable could been recreated/destroyed while animating
+    try {
+        if( null != context ) {
+          helper.invokeGL(drawable, context, defaultDisplayAction, initAction);
+        }
+    } finally {
+        _lock.unlock();
     }
   }
 
+  @Override
+  public final void swapBuffers() throws GLException {
+      defaultSwapBuffers();
+  }
+  
   //----------------------------------------------------------------------
   // Internals only below this point
   //
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
index 65a4c3ece..c5d0df645 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLContext.java
@@ -110,14 +110,8 @@ public abstract class EGLContext extends GLContextImpl {
 
     @Override
     protected void makeCurrentImpl() throws GLException {
-        if(EGL.EGL_NO_DISPLAY==((EGLDrawable)drawable).getDisplay() ) {
-            throw new GLException("drawable not properly initialized, NO DISPLAY: "+drawable);
-        }
         if (EGL.eglGetCurrentContext() != contextHandle) {
-            if (!EGL.eglMakeCurrent(((EGLDrawable)drawable).getDisplay(),
-                                    drawable.getHandle(),
-                                    drawableRead.getHandle(),
-                                    contextHandle)) {
+            if (!EGL.eglMakeCurrent(drawable.getNativeSurface().getDisplayHandle(), drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
                 throw new GLException("Error making context 0x" +
                                       Long.toHexString(contextHandle) + " current: error code 0x" + Integer.toHexString(EGL.eglGetError()));
             }
@@ -126,10 +120,7 @@ public abstract class EGLContext extends GLContextImpl {
 
     @Override
     protected void releaseImpl() throws GLException {
-      if (!EGL.eglMakeCurrent(((EGLDrawable)drawable).getDisplay(),
-                              EGL.EGL_NO_SURFACE,
-                              EGL.EGL_NO_SURFACE,
-                              EGL.EGL_NO_CONTEXT)) {
+      if (!EGL.eglMakeCurrent(drawable.getNativeSurface().getDisplayHandle(), EGL.EGL_NO_SURFACE, EGL.EGL_NO_SURFACE, EGL.EGL_NO_CONTEXT)) {
             throw new GLException("Error freeing OpenGL context 0x" +
                                   Long.toHexString(contextHandle) + ": error code 0x" + Integer.toHexString(EGL.eglGetError()));
       }
@@ -137,7 +128,7 @@ public abstract class EGLContext extends GLContextImpl {
 
     @Override
     protected void destroyImpl() throws GLException {
-      if (!EGL.eglDestroyContext(((EGLDrawable)drawable).getDisplay(), contextHandle)) {
+      if (!EGL.eglDestroyContext(drawable.getNativeSurface().getDisplayHandle(), contextHandle)) {
           final int eglError = EGL.eglGetError();
           if(EGL.EGL_SUCCESS != eglError) { /* oops, Mesa EGL impl. may return false, but has no EGL error */
               throw new GLException("Error destroying OpenGL context 0x" +
@@ -158,16 +149,16 @@ public abstract class EGLContext extends GLContextImpl {
 
     @Override
     protected boolean createImpl(GLContextImpl shareWith) throws GLException {
-        long eglDisplay = ((EGLDrawable)drawable).getDisplay();
-        EGLGraphicsConfiguration config = ((EGLDrawable)drawable).getGraphicsConfiguration();
-        GLProfile glProfile = drawable.getGLProfile();
-        long eglConfig = config.getNativeConfig();
+        final EGLGraphicsConfiguration config = (EGLGraphicsConfiguration) drawable.getNativeSurface().getGraphicsConfiguration();
+        final long eglDisplay = config.getScreen().getDevice().getHandle();
+        final GLProfile glProfile = drawable.getGLProfile();
+        final long eglConfig = config.getNativeConfig();
         long shareWithHandle = EGL.EGL_NO_CONTEXT;
 
-        if (eglDisplay == 0) {
+        if ( 0 == eglDisplay ) {
             throw new GLException("Error: attempted to create an OpenGL context without a display connection");
         }
-        if (eglConfig == 0) {
+        if ( 0 == eglConfig ) {
             throw new GLException("Error: attempted to create an OpenGL context without a graphics configuration");
         }
 
@@ -217,10 +208,7 @@ public abstract class EGLContext extends GLContextImpl {
                                ",\n\t"+this+
                                ",\n\tsharing with 0x" + Long.toHexString(shareWithHandle));
         }
-        if (!EGL.eglMakeCurrent(((EGLDrawable)drawable).getDisplay(),
-                                drawable.getHandle(),
-                                drawableRead.getHandle(),
-                                contextHandle)) {
+        if (!EGL.eglMakeCurrent(eglDisplay, drawable.getHandle(), drawableRead.getHandle(), contextHandle)) {
             throw new GLException("Error making context 0x" +
                                   Long.toHexString(contextHandle) + " current: error code " + EGL.eglGetError());
         }
@@ -269,8 +257,7 @@ public abstract class EGLContext extends GLContextImpl {
           eglQueryStringInitialized = true;
         }
         if (eglQueryStringAvailable) {
-            final String ret = EGL.eglQueryString(((EGLDrawable)drawable).getDisplay(),
-                                                  EGL.EGL_EXTENSIONS);
+            final String ret = EGL.eglQueryString(drawable.getNativeSurface().getDisplayHandle(), EGL.EGL_EXTENSIONS);
             if (DEBUG) {
               System.err.println("EGL extensions: " + ret);
             }
@@ -291,7 +278,7 @@ public abstract class EGLContext extends GLContextImpl {
             }
             return false;
         }
-        return EGL.eglSwapInterval(((EGLDrawable)drawable).getDisplay(), interval);
+        return EGL.eglSwapInterval(drawable.getNativeSurface().getDisplayHandle(), interval);
     }
 
     @Override
@@ -300,6 +287,45 @@ public abstract class EGLContext extends GLContextImpl {
     @Override
     public abstract void releasePbufferFromTexture();
 
+    //
+    // Accessible ..
+    //
+    
+    /**
+     * If context is an ES profile, map it to the given device 
+     * via {@link GLContext#mapAvailableGLVersion(AbstractGraphicsDevice, int, int, int, int, int)}.
+     * <p>
+     * We intentionally override a non native EGL device ES profile mapping,
+     * i.e. this will override/modify an already 'set' X11/WGL/.. mapping.
+     * </p> 
+     * 
+     * @param device
+     */
+    protected void mapCurrentAvailableGLVersion(AbstractGraphicsDevice device) {
+        mapCurrentAvailableGLVersionImpl(device, ctxMajorVersion, ctxMinorVersion, ctxOptions);
+    }
+        
+    protected static void mapStaticGLESVersion(AbstractGraphicsDevice device, int major) {
+        int ctp = ( 2 == major ) ? ( GLContext.CTX_PROFILE_ES | GLContext.CTX_IMPL_ES2_COMPAT | GLContext.CTX_IMPL_FBO ) : ( GLContext.CTX_PROFILE_ES );  
+        mapCurrentAvailableGLVersionImpl(device, major, 0, ctp);
+    }
+    private static void mapCurrentAvailableGLVersionImpl(AbstractGraphicsDevice device, int major, int minor, int ctp) {
+        if( 0 != ( ctp & GLContext.CTX_PROFILE_ES) ) {
+            // ES1 or ES2
+            final int reqMajor = major;
+            final int reqProfile = GLContext.CTX_PROFILE_ES;
+            GLContext.mapAvailableGLVersion(device, reqMajor, reqProfile,
+                                            major, minor, ctp);
+        }
+    }
+    
+    protected static boolean getAvailableGLVersionsSet(AbstractGraphicsDevice device) {
+        return GLContext.getAvailableGLVersionsSet(device);
+    }
+    protected static void setAvailableGLVersionsSet(AbstractGraphicsDevice device) {
+        GLContext.setAvailableGLVersionsSet(device);
+    }
+    
     protected static String toHexString(int hex) {
         return GLContext.toHexString(hex);
     }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java b/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
index e09400c09..432010f49 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDisplayUtil.java
@@ -30,12 +30,15 @@ package jogamp.opengl.egl;
 
 import java.nio.IntBuffer;
 
+import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
+import javax.media.opengl.GLException;
 
 import jogamp.opengl.Debug;
 
 import com.jogamp.common.util.LongIntHashMap;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
 
 /** 
  * This implementation provides recursive calls to  
@@ -67,23 +70,6 @@ public class EGLDisplayUtil {
         return eglDisplay;
     }
     
-    public static long eglGetDisplay(NativeSurface surface, boolean allowFallBackToDefault)  {
-        final long nDisplay;
-        if( NativeWindowFactory.TYPE_WINDOWS.equals(NativeWindowFactory.getNativeWindowType(false)) ) {
-            nDisplay = surface.getSurfaceHandle(); // don't even ask ..
-        } else {
-            nDisplay = surface.getDisplayHandle(); // 0 == EGL.EGL_DEFAULT_DISPLAY
-        }
-        long eglDisplay = EGLDisplayUtil.eglGetDisplay(nDisplay);
-        if (eglDisplay == EGL.EGL_NO_DISPLAY && nDisplay != EGL.EGL_DEFAULT_DISPLAY && allowFallBackToDefault) {
-            if(DEBUG) {
-                System.err.println("EGLDisplayUtil.eglGetDisplay(): Fall back to EGL_DEFAULT_DISPLAY");
-            }
-            eglDisplay = EGLDisplayUtil.eglGetDisplay(EGL.EGL_DEFAULT_DISPLAY);
-        }
-        return eglDisplay;
-    }
-    
     public static synchronized boolean eglInitialize(long eglDisplay, int[] major, int major_offset, int[] minor, int minor_offset)  {
         final boolean res;    
         final int refCnt = eglDisplayCounter.get(eglDisplay) + 1; // 0 + 1 = 1 -> 1st init
@@ -99,7 +85,19 @@ public class EGLDisplayUtil {
         return res;
     }
     
+    /**
+     * 
+     * @param eglDisplay
+     * @param major
+     * @param minor
+     * @return true if the eglDisplay is valid and it's reference counter becomes one and {@link EGL#eglTerminate(long)} was successful, otherwise false
+     * 
+     * @see EGL#eglInitialize(long, int[], int, int[], int)}
+     */
     public static synchronized boolean eglInitialize(long eglDisplay, IntBuffer major, IntBuffer minor)  {    
+        if( EGL.EGL_NO_DISPLAY == eglDisplay) {
+            return false;
+        }
         final boolean res;    
         final int refCnt = eglDisplayCounter.get(eglDisplay) + 1; // 0 + 1 = 1 -> 1st init
         if(1==refCnt) { // only initialize once
@@ -114,7 +112,14 @@ public class EGLDisplayUtil {
         return res;
     }
     
+    /**
+     * @param eglDisplay the EGL display handle
+     * @return true if the eglDisplay is valid and it's reference counter becomes zero and {@link EGL#eglTerminate(long)} was successful, otherwise false
+     */
     public static synchronized boolean eglTerminate(long eglDisplay)  {
+        if( EGL.EGL_NO_DISPLAY == eglDisplay) {
+            return false;
+        }
         final boolean res;    
         final int refCnt = eglDisplayCounter.get(eglDisplay) - 1; // 1 - 1 = 0 -> final terminate
         if(0==refCnt) { // no terminate if still in use or already terminated
@@ -130,4 +135,65 @@ public class EGLDisplayUtil {
         }
         return res;
     }
+    
+    public static final EGLGraphicsDevice.EGLDisplayLifecycleCallback eglLifecycleCallback = new EGLGraphicsDevice.EGLDisplayLifecycleCallback() {
+        public long eglGetAndInitDisplay(long nativeDisplayID) {
+            long eglDisplay = EGLDisplayUtil.eglGetDisplay(nativeDisplayID);
+            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
+                throw new GLException("Failed to created EGL display: 0x"+Long.toHexString(nativeDisplayID)+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+            }
+            if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
+                throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+            }
+            return eglDisplay;
+        }
+        public void eglTerminate(long eglDisplayHandle) {
+            EGLDisplayUtil.eglTerminate(eglDisplayHandle);
+        }
+    };
+    
+    /**
+     * @param nativeDisplayID
+     * @param connection
+     * @param unitID
+     * @return an initialized EGLGraphicsDevice 
+     * @throws GLException if {@link EGL#eglGetDisplay(long)} or {@link EGL#eglInitialize(long, int[], int, int[], int)} fails
+     * @see EGLGraphicsDevice#EGLGraphicsDevice(long, long, String, int, com.jogamp.nativewindow.egl.EGLGraphicsDevice.EGLDisplayLifecycleCallback) 
+     */
+    public static EGLGraphicsDevice eglCreateEGLGraphicsDevice(long nativeDisplayID, String connection, int unitID)  {
+        final EGLGraphicsDevice eglDisplay = new EGLGraphicsDevice(nativeDisplayID, 0, connection, unitID, eglLifecycleCallback);
+        eglDisplay.open();
+        return eglDisplay;
+    }
+    
+    /**
+     * @param surface
+     * @param allowFallBackToDefault
+     * @return an initialized EGLGraphicsDevice 
+     * @throws GLException if {@link EGL#eglGetDisplay(long)} or {@link EGL#eglInitialize(long, int[], int, int[], int)} fails 
+     */
+    public static EGLGraphicsDevice eglCreateEGLGraphicsDevice(NativeSurface surface, boolean allowFallBackToDefault)  {
+        long nativeDisplayID;
+        if( NativeWindowFactory.TYPE_WINDOWS.equals(NativeWindowFactory.getNativeWindowType(false)) ) {
+            nativeDisplayID = surface.getSurfaceHandle(); // don't even ask ..
+        } else {
+            nativeDisplayID = surface.getDisplayHandle(); // 0 == EGL.EGL_DEFAULT_DISPLAY
+        }
+        long eglDisplay = EGLDisplayUtil.eglGetDisplay(nativeDisplayID);
+        if (eglDisplay == EGL.EGL_NO_DISPLAY && nativeDisplayID != EGL.EGL_DEFAULT_DISPLAY && allowFallBackToDefault) {
+            if(DEBUG) {
+                System.err.println("EGLDisplayUtil.eglGetDisplay(): Fall back to EGL_DEFAULT_DISPLAY");
+            }
+            nativeDisplayID = EGL.EGL_DEFAULT_DISPLAY;
+            eglDisplay = EGLDisplayUtil.eglGetDisplay(nativeDisplayID);
+        }
+        if (eglDisplay == EGL.EGL_NO_DISPLAY) {
+            throw new GLException("Failed to created EGL display: "+surface+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+        }
+        if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
+            throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+        }
+        final AbstractGraphicsDevice adevice = surface.getGraphicsConfiguration().getScreen().getDevice();
+        return new EGLGraphicsDevice(nativeDisplayID, eglDisplay, adevice.getConnection(), adevice.getUnitID(), eglLifecycleCallback);                                            
+    }
 }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java b/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java
index 491f22119..383b61f88 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDrawable.java
@@ -36,82 +36,65 @@
 
 package jogamp.opengl.egl;
 
-import jogamp.opengl.GLDynamicLookupHelper;
-import jogamp.opengl.GLDrawableImpl;
+import javax.media.nativewindow.MutableSurface;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindow;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLException;
 
-import javax.media.nativewindow.*;
-import javax.media.nativewindow.VisualIDHolder.VIDType;
-import javax.media.opengl.*;
+import jogamp.opengl.GLDrawableImpl;
+import jogamp.opengl.GLDynamicLookupHelper;
 
-import com.jogamp.nativewindow.egl.*;
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
 
 public abstract class EGLDrawable extends GLDrawableImpl {
-    protected boolean ownEGLDisplay = false; // for destruction
-    protected boolean ownEGLSurface = false; // for destruction
-    private EGLGraphicsConfiguration eglConfig;
-    protected long eglDisplay;
-    protected long eglSurface;
+    private boolean ownEGLSurface = false; // for destruction
 
-    protected EGLDrawable(EGLDrawableFactory factory,
-                       NativeSurface component) throws GLException {
+    protected EGLDrawable(EGLDrawableFactory factory, NativeSurface component) throws GLException {
         super(factory, component, false);
-        eglSurface=EGL.EGL_NO_SURFACE;
-        eglDisplay=0;
-    }
-
-    public long getDisplay() {
-        return eglDisplay;
-    }
-
-    @Override
-    public long getHandle() {
-        return eglSurface;
-    }
-
-    public EGLGraphicsConfiguration getGraphicsConfiguration() {
-        return eglConfig;
-    }
-
-    @Override
-    public GLCapabilitiesImmutable getChosenGLCapabilities() {
-        return (null==eglConfig)?super.getChosenGLCapabilities():(GLCapabilitiesImmutable)eglConfig.getChosenCapabilities();
     }
 
     @Override
     public abstract GLContext createContext(GLContext shareWith);
 
-    protected abstract long createSurface(long eglDpy, long eglNativeCfg, long surfaceHandle);
-
-    private void recreateSurface() {
-        // create a new EGLSurface ..
-        if(EGL.EGL_NO_SURFACE!=eglSurface) {
-            EGL.eglDestroySurface(eglDisplay, eglSurface);
-        }
+    protected abstract long createSurface(EGLGraphicsConfiguration config, long nativeSurfaceHandle);
 
+    private final void recreateSurface() {
+        final EGLGraphicsConfiguration eglConfig = (EGLGraphicsConfiguration) surface.getGraphicsConfiguration();
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) eglConfig.getScreen().getDevice();
         if(DEBUG) {
-            System.err.println(getThreadName() + ": createSurface using eglDisplay "+toHexString(eglDisplay)+", "+eglConfig);
+            System.err.println(getThreadName() + ": createSurface using "+eglConfig);
+        }        
+        if( EGL.EGL_NO_SURFACE != surface.getSurfaceHandle() ) {
+            EGL.eglDestroySurface(eglDevice.getHandle(), surface.getSurfaceHandle());
         }
-
-        eglSurface = createSurface(eglDisplay, eglConfig.getNativeConfig(), surface.getSurfaceHandle());
-        int eglError0 = EGL.EGL_SUCCESS;
+        
+        final EGLUpstreamSurfaceHook upstreamHook = (EGLUpstreamSurfaceHook) ((ProxySurface)surface).getUpstreamSurfaceHook();
+        final NativeSurface upstreamSurface = upstreamHook.getUpstreamSurface();
+        long eglSurface = createSurface(eglConfig, upstreamSurface.getSurfaceHandle());
+        
+        int eglError0;
         if (EGL.EGL_NO_SURFACE == eglSurface) {
             eglError0 = EGL.eglGetError();
             if(EGL.EGL_BAD_NATIVE_WINDOW == eglError0) {
                 // Try window handle if available and differs (Windows HDC / HWND).
                 // ANGLE impl. required HWND on Windows.
-                if(surface instanceof NativeWindow) {
-                    final NativeWindow nw = (NativeWindow) surface;
+                if(upstreamSurface instanceof NativeWindow) {
+                    final NativeWindow nw = (NativeWindow) upstreamSurface;
                     if(nw.getWindowHandle() != nw.getSurfaceHandle()) {
                         if(DEBUG) {
                             System.err.println(getThreadName() + ": Info: Creation of window surface w/ surface handle failed: "+eglConfig+", error "+toHexString(eglError0)+", retry w/ windowHandle");
                         }
-                        eglSurface = createSurface(eglDisplay, eglConfig.getNativeConfig(), nw.getWindowHandle());
+                        eglSurface = createSurface(eglConfig, nw.getWindowHandle());
                         if (EGL.EGL_NO_SURFACE == eglSurface) {
                             eglError0 = EGL.eglGetError();
                         }
                     }
                 }
             }
+        } else {
+            eglError0 = EGL.EGL_SUCCESS;
         }
         if (EGL.EGL_NO_SURFACE == eglSurface) {
             throw new GLException("Creation of window surface failed: "+eglConfig+", "+surface+", error "+toHexString(eglError0));
@@ -120,6 +103,8 @@ public abstract class EGLDrawable extends GLDrawableImpl {
         if(DEBUG) {
             System.err.println(getThreadName() + ": setSurface using component: handle "+toHexString(surface.getSurfaceHandle())+" -> "+toHexString(eglSurface));
         }
+        
+        ((MutableSurface)surface).setSurfaceHandle(eglSurface);
     }
 
     @Override
@@ -130,131 +115,72 @@ public abstract class EGLDrawable extends GLDrawableImpl {
     }
 
     @Override
-    protected void setRealizedImpl() {
+    protected final void setRealizedImpl() {
+        final EGLGraphicsConfiguration eglConfig = (EGLGraphicsConfiguration) surface.getGraphicsConfiguration();
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) eglConfig.getScreen().getDevice();
         if (realized) {
-            AbstractGraphicsConfiguration aConfig = surface.getGraphicsConfiguration();
-            AbstractGraphicsDevice aDevice = aConfig.getScreen().getDevice();
-            if(aDevice instanceof EGLGraphicsDevice) {
-                if(DEBUG) {
-                    System.err.println(getThreadName() + ": EGLDrawable.setRealized(true): using existing EGL config - START");
-                }
-                // just fetch the data .. trust but verify ..
-                eglDisplay = aDevice.getHandle();
-                if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                    throw new GLException("Invalid EGL display in EGLGraphicsDevice from "+aDevice);
+            final long eglDisplayHandle = eglDevice.getHandle();
+            if (EGL.EGL_NO_DISPLAY == eglDisplayHandle) {
+                throw new GLException("Invalid EGL display in EGLGraphicsDevice "+eglDevice);
+            }
+            int[] tmp = new int[1];
+            boolean eglSurfaceValid = 0 != surface.getSurfaceHandle();
+            if(eglSurfaceValid) {
+                eglSurfaceValid = EGL.eglQuerySurface(eglDisplayHandle, surface.getSurfaceHandle(), EGL.EGL_CONFIG_ID, tmp, 0);
+                if(!eglSurfaceValid) {
+                    if(DEBUG) {
+                        System.err.println(getThreadName() + ": EGLDrawable.setRealizedImpl eglQuerySuface failed: "+toHexString(EGL.eglGetError())+", "+surface);
+                    }                    
                 }
-                if(aConfig instanceof EGLGraphicsConfiguration) {
-                    eglConfig = (EGLGraphicsConfiguration) aConfig; // done ..
-                    if (null == eglConfig) {
-                        throw new GLException("Null EGLGraphicsConfiguration from "+aConfig);
-                    }
-
-                    int[] tmp = new int[1];
-                    if ( 0 != surface.getSurfaceHandle() &&
-                         EGL.eglQuerySurface(eglDisplay, surface.getSurfaceHandle(), EGL.EGL_CONFIG_ID, tmp, 0) ) {
-                        // surface holds static EGLSurface
-                        eglSurface = surface.getSurfaceHandle();
-                        if(DEBUG) {
-                            System.err.println(getThreadName() + ": setSurface re-using component's EGLSurface: handle "+toHexString(eglSurface));
-                        }
-                    } else {
-                        // EGLSurface is ours - subsequent updateHandle() will issue recreateSurface();
-                        ownEGLSurface=true;
-                    }
-                } else {
-                    throw new GLException("EGLGraphicsDevice hold by non EGLGraphicsConfiguration: "+aConfig);
+            }
+            if(eglSurfaceValid) {
+                // surface holds valid EGLSurface
+                if(DEBUG) {
+                    System.err.println(getThreadName() + ": EGLDrawable.setRealizedImpl re-using component's EGLSurface: handle "+toHexString(surface.getSurfaceHandle()));
                 }
+                ownEGLSurface=false;
             } else {
-                if(DEBUG) {
-                    System.err.println(getThreadName() + ": EGLDrawable.setRealized(true): creating new EGL config - START");
+                // EGLSurface is ours - subsequent updateHandle() will issue recreateSurface();
+                // However .. let's validate the surface object first
+                if( ! (surface instanceof ProxySurface) ) {
+                    throw new InternalError("surface not ProxySurface: "+surface.getClass().getName()+", "+surface);
                 }
-                // create a new EGL config ..
-                ownEGLDisplay=true;
-                // EGLSurface is ours ..
-                ownEGLSurface=true;
-
-                eglDisplay = EGLDisplayUtil.eglGetDisplay(surface, true);
-                if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                    throw new GLException("Failed to created EGL display: "+surface+", "+aDevice+", error "+toHexString(EGL.eglGetError()));
+                final ProxySurface.UpstreamSurfaceHook upstreamHook = ((ProxySurface)surface).getUpstreamSurfaceHook();
+                if( null == upstreamHook ) {
+                    throw new InternalError("null upstreamHook of: "+surface);
                 }
-                if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
-                    throw new GLException("eglInitialize failed"+", error "+Integer.toHexString(EGL.eglGetError()));
+                if( ! (upstreamHook instanceof EGLUpstreamSurfaceHook) ) {
+                    throw new InternalError("upstreamHook not EGLUpstreamSurfaceHook: Surface: "+surface.getClass().getName()+", "+surface+"; UpstreamHook: "+upstreamHook.getClass().getName()+", "+upstreamHook);
                 }
-                EGLGraphicsDevice e = new EGLGraphicsDevice(eglDisplay, AbstractGraphicsDevice.DEFAULT_CONNECTION, AbstractGraphicsDevice.DEFAULT_UNIT);
-                AbstractGraphicsScreen s = new DefaultGraphicsScreen(e, aConfig.getScreen().getIndex());
-                final GLCapabilitiesImmutable capsRequested = (GLCapabilitiesImmutable) aConfig.getRequestedCapabilities();
-                if(aConfig instanceof EGLGraphicsConfiguration) {
-                    final EGLGLCapabilities capsChosen = (EGLGLCapabilities) aConfig.getChosenCapabilities();
-                    if(0 == capsChosen.getEGLConfig()) {
-                        // 'refresh' the native EGLConfig handle
-                        capsChosen.setEGLConfig(EGLGraphicsConfiguration.EGLConfigId2EGLConfig(eglDisplay, capsChosen.getEGLConfigID()));
-                        if(0 == capsChosen.getEGLConfig()) {
-                            throw new GLException("Refreshing native EGLConfig handle failed: "+capsChosen+" of "+aConfig);
-                        }
-                    }
-                    eglConfig  = new EGLGraphicsConfiguration(s, capsChosen, capsRequested, null);
-                    if(DEBUG) {
-                        System.err.println(getThreadName() + ": Reusing chosenCaps: "+eglConfig);
-                    }
-                } else {
-                    eglConfig = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-                            capsRequested, capsRequested, null, s, aConfig.getVisualID(VIDType.NATIVE), false);
-
-                    if (null == eglConfig) {
-                        throw new GLException("Couldn't create EGLGraphicsConfiguration from "+s);
-                    } else if(DEBUG) {
-                        System.err.println(getThreadName() + ": Chosen eglConfig: "+eglConfig);
-                    }
+                if( null == ((EGLUpstreamSurfaceHook)upstreamHook).getUpstreamSurface() ) {
+                    throw new InternalError("null upstream surface");
+                }
+                ownEGLSurface=true;
+                if(DEBUG) {
+                    System.err.println(getThreadName() + ": EGLDrawable.setRealizedImpl owning EGLSurface");
                 }
-                // subsequent updateHandle() will issue recreateSurface();
-            }
-            if(DEBUG) {
-                System.err.println(getThreadName() + ": EGLDrawable.setRealized(true): END: ownDisplay "+ownEGLDisplay+", ownSurface "+ownEGLSurface);
             }
-        } else if (ownEGLSurface && eglSurface != EGL.EGL_NO_SURFACE) {
+        } else if (ownEGLSurface && surface.getSurfaceHandle() != EGL.EGL_NO_SURFACE) {
             if(DEBUG) {
-                System.err.println(getThreadName() + ": EGLDrawable.setRealized(false): ownDisplay "+ownEGLDisplay+", ownSurface "+ownEGLSurface+", eglDisplay: "+toHexString(eglDisplay)+", eglSurface: "+toHexString(eglSurface));
+                System.err.println(getThreadName() + ": EGLDrawable.setRealized(false): ownSurface "+ownEGLSurface+", "+eglDevice+", eglSurface: "+toHexString(surface.getSurfaceHandle()));
             }
             // Destroy the window surface
-            if (!EGL.eglDestroySurface(eglDisplay, eglSurface)) {
+            if (!EGL.eglDestroySurface(eglDevice.getHandle(), surface.getSurfaceHandle())) {
                 throw new GLException("Error destroying window surface (eglDestroySurface)");
             }
-            eglSurface = EGL.EGL_NO_SURFACE;
-            if (ownEGLDisplay && EGL.EGL_NO_DISPLAY!=eglDisplay) {
-                EGLDisplayUtil.eglTerminate(eglDisplay);
-            }
-            eglDisplay=EGL.EGL_NO_DISPLAY;
-            eglConfig=null;
+            ((MutableSurface)surface).setSurfaceHandle(EGL.EGL_NO_SURFACE);
         }
     }
 
     @Override
     protected final void swapBuffersImpl() {
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) surface.getGraphicsConfiguration().getScreen().getDevice();
         // single-buffer is already filtered out @ GLDrawableImpl#swapBuffers()
-        if(!EGL.eglSwapBuffers(eglDisplay, eglSurface)) {
+        if(!EGL.eglSwapBuffers(eglDevice.getHandle(), surface.getSurfaceHandle())) {
             throw new GLException("Error swapping buffers, eglError "+toHexString(EGL.eglGetError())+", "+this);
         }
     }
 
-    /**
-     * Surface not realizes yet (onscreen) .. Quering EGL surface size only makes sense for external drawable.
-     * Leave it here for later impl. of an EGLExternalDrawable.
-    public int getWidth() {
-        int[] tmp = new int[1];
-        if (!EGL.eglQuerySurface(eglDisplay, eglSurface, EGL.EGL_WIDTH, tmp, 0)) {
-            throw new GLException("Error querying surface width, eglError "+toHexString(EGL.eglGetError()));
-        }
-        return tmp[0];
-    }
-
-    public int getHeight() {
-        int[] tmp = new int[1];
-        if (!EGL.eglQuerySurface(eglDisplay, eglSurface, EGL.EGL_HEIGHT, tmp, 0)) {
-            throw new GLException("Error querying surface height, eglError "+toHexString(EGL.eglGetError()));
-        }
-        return tmp[0];
-    } */
-
     @Override
     public GLDynamicLookupHelper getGLDynamicLookupHelper() {
         if (getGLProfile().usesNativeGLES2()) {
@@ -271,8 +197,8 @@ public abstract class EGLDrawable extends GLDrawableImpl {
         return getClass().getName()+"[realized "+isRealized()+
                     ",\n\tfactory    "+getFactory()+
                     ",\n\tsurface    "+getNativeSurface()+
-                    ",\n\teglSurface "+toHexString(eglSurface)+
-                    ",\n\teglConfig  "+eglConfig+
+                    ",\n\teglSurface "+toHexString(surface.getSurfaceHandle())+
+                    ",\n\teglConfig  "+surface.getGraphicsConfiguration()+
                     ",\n\trequested  "+getRequestedGLCapabilities()+
                     ",\n\tchosen     "+getChosenGLCapabilities()+"]";
     }
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
index e4f6f0ef8..c848e3e5c 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLDrawableFactory.java
@@ -46,21 +46,29 @@ import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.DefaultGraphicsScreen;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.ProxySurface.UpstreamSurfaceHook;
+import javax.media.nativewindow.VisualIDHolder.VIDType;
 import javax.media.nativewindow.VisualIDHolder;
+import javax.media.opengl.GL;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.GLProfile.ShutdownType;
 
+import jogamp.opengl.Debug;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
 
 import com.jogamp.common.JogampRuntimeException;
 import com.jogamp.common.os.Platform;
@@ -69,6 +77,9 @@ import com.jogamp.nativewindow.WrappedSurface;
 import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
 
 public class EGLDrawableFactory extends GLDrawableFactoryImpl {
+    /* package */ static final boolean QUERY_EGL_ES = !Debug.isPropertyDefined("jogl.debug.EGLDrawableFactory.DontQuery", true);
+    /* package */ static final boolean QUERY_EGL_ES_NATIVE_TK = Debug.isPropertyDefined("jogl.debug.EGLDrawableFactory.QueryNativeTK", true);
+    
     private static GLDynamicLookupHelper eglES1DynamicLookupHelper = null;
     private static GLDynamicLookupHelper eglES2DynamicLookupHelper = null;
     private static boolean isANGLE = false;
@@ -184,10 +195,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
                 if(DEBUG) {
                     System.err.println("EGLDrawableFactory.destroy("+shutdownType+"): "+sr.device.toString());
                 }
-                final long eglDisplay = sr.device.getHandle();
-                if(EGL.EGL_NO_DISPLAY != eglDisplay) {
-                    EGLDisplayUtil.eglTerminate(eglDisplay);
-                }
+                sr.device.close();
             }
             sharedMap.clear();
             sharedMap = null;
@@ -234,7 +242,7 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
       // final EGLContext getContextES1() { return contextES1; }
       // final EGLContext getContextES2() { return contextES2; }
       final boolean wasES1ContextAvailable() { return wasES1ContextCreated; }
-      final boolean wasES2ContextAvailable() { return wasES2ContextCreated; }
+      final boolean wasES2ContextAvailable() { return wasES2ContextCreated; }      
     }
 
     @Override
@@ -248,66 +256,144 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
       return null!=eglES2DynamicLookupHelper || null!=eglES1DynamicLookupHelper;
     }
 
-    /**
-    private boolean isEGLContextAvailable(EGLGraphicsDevice sharedDevice, String profile) {
-        boolean madeCurrent = false;
-        final GLCapabilities caps = new GLCapabilities(GLProfile.get(profile));
-        caps.setRedBits(5); caps.setGreenBits(5); caps.setBlueBits(5); caps.setAlphaBits(0);
-        caps.setDoubleBuffered(false);
-        caps.setOnscreen(false);
-        caps.setPBuffer(true);
-        final EGLDrawable drawable = (EGLDrawable) createGLDrawable( createOffscreenSurfaceImpl(sharedDevice, caps, caps, null, 64, 64) );
-        if(null!=drawable) {
+    private boolean isEGLContextAvailable(AbstractGraphicsDevice adevice, EGLGraphicsDevice sharedEGLDevice, String profileString) {
+        if( !GLProfile.isAvailable(adevice, profileString) ) {
+            return false;
+        }
+        final GLProfile glp = GLProfile.get(adevice, profileString) ;
+        final GLDrawableFactoryImpl desktopFactory = (GLDrawableFactoryImpl) GLDrawableFactory.getDesktopFactory();
+        EGLGraphicsDevice eglDevice = null;
+        NativeSurface surface = null;
+        ProxySurface upstreamSurface = null; // X11, GLX, ..
+        boolean success = false;
+        boolean deviceFromUpstreamSurface = false;
+        try {            
+            final GLCapabilities caps = new GLCapabilities(glp);
+            caps.setRedBits(5); caps.setGreenBits(5); caps.setBlueBits(5); caps.setAlphaBits(0);
+            if(adevice instanceof EGLGraphicsDevice || null == desktopFactory || !QUERY_EGL_ES_NATIVE_TK) {
+                eglDevice = sharedEGLDevice; // reuse
+                surface = createDummySurfaceImpl(eglDevice, false, caps, null, 64, 64); // egl pbuffer offscreen
+                upstreamSurface = (ProxySurface)surface;
+                upstreamSurface.createNotify();
+                deviceFromUpstreamSurface = false;
+            } else {
+                surface = desktopFactory.createDummySurface(adevice, caps, null, 64, 64); // X11, WGL, .. dummy window
+                upstreamSurface = ( surface instanceof ProxySurface ) ? (ProxySurface)surface : null ;
+                if(null != upstreamSurface) {
+                    upstreamSurface.createNotify();
+                }                    
+                eglDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(surface, true);
+                deviceFromUpstreamSurface = true;
+            }
+            
+            final EGLDrawable drawable = (EGLDrawable) createOnscreenDrawableImpl ( surface );
+            drawable.setRealized(true);
             final EGLContext context = (EGLContext) drawable.createContext(null);
             if (null != context) {
-                context.setSynchronized(true);
                 try {
                     context.makeCurrent(); // could cause exception
-                    madeCurrent = context.isCurrent();
+                    success = context.isCurrent();
+                    if(success) {
+                        final String glVersion = context.getGL().glGetString(GL.GL_VERSION);
+                        if(null == glVersion) {
+                            // Oops .. something is wrong
+                            if(DEBUG) {
+                                System.err.println("EGLDrawableFactory.isEGLContextAvailable: "+eglDevice+", "+context.getGLVersion()+" - VERSION is null, dropping availability!");                                
+                            }
+                            success = false;
+                        }
+                    }
+                    if(success) {
+                        context.mapCurrentAvailableGLVersion(eglDevice);
+                        if(eglDevice != adevice) {
+                            context.mapCurrentAvailableGLVersion(adevice);
+                        }
+                    }
                 } catch (GLException gle) {
                     if (DEBUG) {
-                        System.err.println("EGLDrawableFactory.createShared: INFO: makeCurrent failed");
+                        System.err.println("EGLDrawableFactory.createShared: INFO: context create/makeCurrent failed");
                         gle.printStackTrace();
                     }
                 } finally {
                     context.destroy();
                 }
             }
-            drawable.destroy();
+            drawable.setRealized(false);
+        } catch (Throwable t) {
+            if(DEBUG) {
+                System.err.println("Catched Exception:");
+                t.printStackTrace();
+            }
+            success = false;
+        } finally {
+            if(eglDevice == sharedEGLDevice) {
+                if(null != upstreamSurface) {
+                    upstreamSurface.destroyNotify();
+                }                
+            } else if( deviceFromUpstreamSurface ) {
+                if(null != eglDevice) {
+                    eglDevice.close();
+                }
+                if(null != upstreamSurface) {
+                    upstreamSurface.destroyNotify();
+                }
+            } else {
+                if(null != upstreamSurface) {
+                    upstreamSurface.destroyNotify();
+                }                
+                if(null != eglDevice) {
+                    eglDevice.close();
+                }
+            }
         }
-        return madeCurrent;
-    } */
+        return success;
+    }
 
     /* package */ SharedResource getOrCreateEGLSharedResource(AbstractGraphicsDevice adevice) {
         if(null == eglES1DynamicLookupHelper && null == eglES2DynamicLookupHelper) {
             return null;
         }
-        String connection = adevice.getConnection();
+        final String connection = adevice.getConnection();
         SharedResource sr;
         synchronized(sharedMap) {
             sr = sharedMap.get(connection);
         }
         if(null==sr) {
-            long eglDisplay = EGLDisplayUtil.eglGetDisplay(EGL.EGL_DEFAULT_DISPLAY);
-            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                throw new GLException("Failed to created EGL default display: error 0x"+Integer.toHexString(EGL.eglGetError()));
-            } else if(DEBUG) {
-                System.err.println("EGLDrawableFactory.createShared: eglDisplay(EGL_DEFAULT_DISPLAY): 0x"+Long.toHexString(eglDisplay));
+            final boolean madeCurrentES1;            
+            final boolean madeCurrentES2;
+            final EGLGraphicsDevice sharedDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(EGL.EGL_DEFAULT_DISPLAY, AbstractGraphicsDevice.DEFAULT_CONNECTION, AbstractGraphicsDevice.DEFAULT_UNIT);
+            
+            if(QUERY_EGL_ES) {
+                madeCurrentES1 = isEGLContextAvailable(adevice, sharedDevice, GLProfile.GLES1);
+                madeCurrentES2 = isEGLContextAvailable(adevice, sharedDevice, GLProfile.GLES2);                
+            } else {            
+                madeCurrentES1 = true;            
+                madeCurrentES2 = true;
+                EGLContext.mapStaticGLESVersion(sharedDevice, 1);
+                if(sharedDevice != adevice) {
+                    EGLContext.mapStaticGLESVersion(adevice, 1);
+                }
+                EGLContext.mapStaticGLESVersion(sharedDevice, 2);
+                if(sharedDevice != adevice) {
+                    EGLContext.mapStaticGLESVersion(adevice, 2);
+                }
             }
-            if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
-                throw new GLException("eglInitialize failed"+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+            
+            if( !EGLContext.getAvailableGLVersionsSet(adevice) ) {
+                // Even though we override the non EGL native mapping intentionally,
+                // avoid exception due to double 'set' - carefull exception of the rule. 
+                EGLContext.setAvailableGLVersionsSet(adevice);
             }
-            final EGLGraphicsDevice sharedDevice = new EGLGraphicsDevice(eglDisplay, connection, adevice.getUnitID());
-            // final boolean madeCurrentES1 = isEGLContextAvailable(sharedDevice, GLProfile.GLES1);
-            // final boolean madeCurrentES2 = isEGLContextAvailable(sharedDevice, GLProfile.GLES2);
-            final boolean madeCurrentES1 = true; // FIXME
-            final boolean madeCurrentES2 = true; // FIXME
             sr = new SharedResource(sharedDevice, madeCurrentES1, madeCurrentES2);
+            
             synchronized(sharedMap) {
                 sharedMap.put(connection, sr);
+                if(adevice != sharedDevice) {
+                    sharedMap.put(sharedDevice.getConnection(), sr);
+                }
             }
             if (DEBUG) {
-                System.err.println("EGLDrawableFactory.createShared: device:  " + sharedDevice);
+                System.err.println("EGLDrawableFactory.createShared: devices:  queried " + QUERY_EGL_ES + "[nativeTK "+QUERY_EGL_ES_NATIVE_TK+"], " + adevice + ", " + sharedDevice);
                 System.err.println("EGLDrawableFactory.createShared: context ES1: " + madeCurrentES1);
                 System.err.println("EGLDrawableFactory.createShared: context ES2: " + madeCurrentES2);
             }
@@ -378,8 +464,51 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
         if (target == null) {
           throw new IllegalArgumentException("Null target");
         }
-        return new EGLOnscreenDrawable(this, target);
+        return new EGLOnscreenDrawable(this, getEGLSurface(target));
+    }
+    
+    protected static NativeSurface getEGLSurface(NativeSurface surface) {
+        AbstractGraphicsConfiguration aConfig = surface.getGraphicsConfiguration();
+        AbstractGraphicsDevice aDevice = aConfig.getScreen().getDevice();
+        if( aDevice instanceof EGLGraphicsDevice && aConfig instanceof EGLGraphicsConfiguration ) {
+            // already in native EGL format
+            if(DEBUG) {
+                System.err.println(getThreadName() + ": getEGLSurface - already in EGL format - use as-is: "+aConfig);
+            }
+            return surface;
+        }
+        // create EGL instance out of platform native types
+        final EGLGraphicsDevice eglDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(surface, true);
+        final AbstractGraphicsScreen eglScreen = new DefaultGraphicsScreen(eglDevice, aConfig.getScreen().getIndex());
+        final GLCapabilitiesImmutable capsRequested = (GLCapabilitiesImmutable) aConfig.getRequestedCapabilities();
+        final EGLGraphicsConfiguration eglConfig;
+        if( aConfig instanceof EGLGraphicsConfiguration ) {
+            // Config is already in EGL type - reuse ..
+            final EGLGLCapabilities capsChosen = (EGLGLCapabilities) aConfig.getChosenCapabilities();
+            if( 0 == capsChosen.getEGLConfig() ) {
+                // 'refresh' the native EGLConfig handle
+                capsChosen.setEGLConfig(EGLGraphicsConfiguration.EGLConfigId2EGLConfig(eglDevice.getHandle(), capsChosen.getEGLConfigID()));
+                if( 0 == capsChosen.getEGLConfig() ) {
+                    throw new GLException("Refreshing native EGLConfig handle failed: "+capsChosen+" of "+aConfig);
+                }
+            }
+            eglConfig  = new EGLGraphicsConfiguration(eglScreen, capsChosen, capsRequested, null);
+            if(DEBUG) {
+                System.err.println(getThreadName() + ": getEGLSurface - Reusing chosenCaps: "+eglConfig);
+            }
+        } else {
+            eglConfig = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
+                    capsRequested, capsRequested, null, eglScreen, aConfig.getVisualID(VIDType.NATIVE), false);
+
+            if (null == eglConfig) {
+                throw new GLException("Couldn't create EGLGraphicsConfiguration from "+eglScreen);
+            } else if(DEBUG) {
+                System.err.println(getThreadName() + ": getEGLSurface - Chosen eglConfig: "+eglConfig);
+            }
+        }
+        return new WrappedSurface(eglConfig, EGL.EGL_NO_SURFACE, surface.getWidth(), surface.getHeight(), new EGLUpstreamSurfaceHook(surface));
     }
+    static String getThreadName() { return Thread.currentThread().getName(); }
 
     @Override
     protected GLDrawableImpl createOffscreenDrawableImpl(NativeSurface target) {
@@ -401,20 +530,115 @@ public class EGLDrawableFactory extends GLDrawableFactoryImpl {
     }
 
     @Override
-    protected NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
-        WrappedSurface ns = new WrappedSurface(EGLGraphicsConfigurationFactory.createOffscreenGraphicsConfiguration(device, capsChosen, capsRequested, chooser));
-        ns.surfaceSizeChanged(width, height);
-        return ns;
+    protected ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                    GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, 
+                                                    GLCapabilitiesChooser chooser, int width, int height, UpstreamSurfaceHook lifecycleHook) {
+        final EGLGraphicsDevice device;
+        if(createNewDevice) {
+            final EGLGraphicsDevice eglDeviceReq = (EGLGraphicsDevice) deviceReq;
+            device = EGLDisplayUtil.eglCreateEGLGraphicsDevice(eglDeviceReq.getNativeDisplayID(), deviceReq.getConnection(), deviceReq.getUnitID());
+        } else {
+            device = (EGLGraphicsDevice) deviceReq;
+        }
+        final DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+        final EGLGraphicsConfiguration config = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
+        if(null == config) {
+            throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen); 
+        }    
+        return new WrappedSurface(config, 0, width, height, lifecycleHook);
+    }
+    
+    @Override
+    public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                     GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+        final GLCapabilitiesImmutable chosenCaps = GLGraphicsConfigurationUtil.fixOffscreenGLCapabilities(requestedCaps, false, canCreateGLPbuffer(deviceReq));        
+        return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser, width, height, dummySurfaceLifecycleHook);
+    }
+    private static final ProxySurface.UpstreamSurfaceHook dummySurfaceLifecycleHook = new ProxySurface.UpstreamSurfaceHook() {
+        @Override
+        public final void create(ProxySurface s) {
+            if( EGL.EGL_NO_SURFACE == s.getSurfaceHandle() ) {
+                final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) s.getGraphicsConfiguration().getScreen().getDevice();
+                if(0 == eglDevice.getHandle()) {
+                    eglDevice.open();
+                    s.setImplBitfield(ProxySurface.OWN_DEVICE);
+                }
+                createPBufferSurfaceImpl(s, false);
+                if(DEBUG) {
+                    System.err.println("EGLDrawableFactory.dummySurfaceLifecycleHook.create: "+s);
+                }
+            }
+        }
+        @Override
+        public final void destroy(ProxySurface s) {
+            if( EGL.EGL_NO_SURFACE != s.getSurfaceHandle() ) {
+                final EGLGraphicsConfiguration config = (EGLGraphicsConfiguration) s.getGraphicsConfiguration();
+                final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) config.getScreen().getDevice();
+                EGL.eglDestroySurface(eglDevice.getHandle(), s.getSurfaceHandle());
+                s.setSurfaceHandle(EGL.EGL_NO_SURFACE);
+                if( 0 != ( ProxySurface.OWN_DEVICE & s.getImplBitfield() ) ) {
+                    eglDevice.close();
+                }
+                if(DEBUG) {
+                    System.err.println("EGLDrawableFactory.dummySurfaceLifecycleHook.create: "+s);
+                }
+            }
+        }
+        @Override
+        public final int getWidth(ProxySurface s) {
+            return s.initialWidth;
+        }
+        @Override
+        public final int getHeight(ProxySurface s) {
+            return s.initialHeight;
+        }
+        @Override
+        public String toString() {
+            return "EGLSurfaceLifecycleHook[]";
+        }
+        
+    };
+    
+    /**
+     * @param ms {@link MutableSurface} which dimensions and config are being used to create the pbuffer surface. 
+     *           It will also hold the resulting pbuffer surface handle. 
+     * @param useTexture
+     * @return the passed {@link MutableSurface} which now has the EGL pbuffer surface set as it's handle
+     */
+    protected static MutableSurface createPBufferSurfaceImpl(MutableSurface ms, boolean useTexture) {
+        final EGLGraphicsConfiguration config = (EGLGraphicsConfiguration) ms.getGraphicsConfiguration();
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) config.getScreen().getDevice();
+        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+        final int texFormat;
+
+        if(useTexture) {
+            texFormat = caps.getAlphaBits() > 0 ? EGL.EGL_TEXTURE_RGBA : EGL.EGL_TEXTURE_RGB ;
+        } else {
+            texFormat = EGL.EGL_NO_TEXTURE;
+        }
+
+        if (DEBUG) {
+          System.out.println("Pbuffer config: " + config);
+        }
+
+        final int[] attrs = EGLGraphicsConfiguration.CreatePBufferSurfaceAttribList(ms.getWidth(), ms.getHeight(), texFormat);
+        final long surf = EGL.eglCreatePbufferSurface(eglDevice.getHandle(), config.getNativeConfig(), attrs, 0);
+        if (EGL.EGL_NO_SURFACE==surf) {
+            throw new GLException("Creation of window surface (eglCreatePbufferSurface) failed, dim "+ms.getWidth()+"x"+ms.getHeight()+", error 0x"+Integer.toHexString(EGL.eglGetError()));
+        } else if(DEBUG) {
+            System.err.println("PBuffer setSurface result: eglSurface 0x"+Long.toHexString(surf));
+        }
+        ms.setSurfaceHandle(surf);
+        return ms;
     }
 
     @Override
-    protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice adevice, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-        // FIXME device/windowHandle -> screen ?!
-        EGLGraphicsDevice device = (EGLGraphicsDevice) adevice;
-        DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
-        EGLGraphicsConfiguration cfg = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
-        WrappedSurface ns = new WrappedSurface(cfg, windowHandle);
-        return ns;
+    protected ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+        final EGLGraphicsDevice eglDeviceReq = (EGLGraphicsDevice) deviceReq;
+        final EGLGraphicsDevice device = EGLDisplayUtil.eglCreateEGLGraphicsDevice(eglDeviceReq.getNativeDisplayID(), deviceReq.getConnection(), deviceReq.getUnitID());
+        final DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, screenIdx);
+        final EGLGraphicsConfiguration cfg = EGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
+        return new WrappedSurface(cfg, windowHandle, 0, 0, upstream);
     }
 
     @Override
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java
index 56e7a4d22..716a6e6f1 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfiguration.java
@@ -42,6 +42,7 @@ import java.util.List;
 
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
+import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.nativewindow.VisualIDHolder;
 import javax.media.opengl.DefaultGLCapabilitiesChooser;
@@ -96,9 +97,10 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
     }
         
     void updateGraphicsConfiguration() {
+        CapabilitiesImmutable capsChosen = getChosenCapabilities(); 
         EGLGraphicsConfiguration newConfig = (EGLGraphicsConfiguration)
-            GraphicsConfigurationFactory.getFactory(getScreen().getDevice()).chooseGraphicsConfiguration(
-                getChosenCapabilities(), getRequestedCapabilities(), chooser, getScreen());
+            GraphicsConfigurationFactory.getFactory(getScreen().getDevice(), capsChosen).chooseGraphicsConfiguration(
+                capsChosen, getRequestedCapabilities(), chooser, getScreen(), VisualIDHolder.VID_UNDEFINED);
         if(null!=newConfig) {
             // FIXME: setScreen( ... );
             setChosenCapabilities(newConfig.getChosenCapabilities());
@@ -151,7 +153,7 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
     public static EGLGLCapabilities EGLConfig2Capabilities(GLProfile glp, long display, long config,
                                                            boolean relaxed, boolean onscreen, boolean usePBuffer, boolean forceTransparentFlag) {
         List<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
+        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer, false);
         if( EGLConfig2Capabilities(bucket, glp, display, config, winattrmask, forceTransparentFlag) ) {
             return (EGLGLCapabilities) bucket.get(0);
         } else if ( relaxed && EGLConfig2Capabilities(bucket, glp, display, config, GLGraphicsConfigurationUtil.ALL_BITS, forceTransparentFlag) ) {
@@ -209,24 +211,6 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
             return false;
         }        
                 
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_RED_SIZE, val)) {
-            caps.setRedBits(val.get(0));
-        }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_GREEN_SIZE, val)) {
-            caps.setGreenBits(val.get(0));
-        }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_BLUE_SIZE, val)) {
-            caps.setBlueBits(val.get(0));
-        }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_ALPHA_SIZE, val)) {
-            caps.setAlphaBits(val.get(0));
-        }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_STENCIL_SIZE, val)) {
-            caps.setStencilBits(val.get(0));
-        }
-        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_DEPTH_SIZE, val)) {
-            caps.setDepthBits(val.get(0));
-        }
         if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_SAMPLES, val)) {
             caps.setSampleBuffers(val.get(0)>0?true:false);
             caps.setNumSamples(val.get(0));
@@ -262,6 +246,25 @@ public class EGLGraphicsConfiguration extends MutableGraphicsConfiguration imple
                 caps.setTransparentAlphaValue(val.get(0)==EGL.EGL_DONT_CARE?-1:val.get(0));
             } */
         }
+        // ALPHA shall be set at last - due to it's auto setting by the above (!opaque / samples)
+        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_RED_SIZE, val)) {
+            caps.setRedBits(val.get(0));
+        }
+        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_GREEN_SIZE, val)) {
+            caps.setGreenBits(val.get(0));
+        }
+        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_BLUE_SIZE, val)) {
+            caps.setBlueBits(val.get(0));
+        }
+        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_ALPHA_SIZE, val)) {
+            caps.setAlphaBits(val.get(0));
+        }
+        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_STENCIL_SIZE, val)) {
+            caps.setStencilBits(val.get(0));
+        }
+        if(EGL.eglGetConfigAttrib(display, config, EGL.EGL_DEPTH_SIZE, val)) {
+            caps.setDepthBits(val.get(0));
+        }
         return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, caps, drawableTypeBits );
     }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java
index 5ab2632c6..0b21d2054 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLGraphicsConfigurationFactory.java
@@ -38,7 +38,6 @@ import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
-import javax.media.nativewindow.DefaultGraphicsScreen;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.nativewindow.VisualIDHolder;
 import javax.media.nativewindow.VisualIDHolder.VIDType;
@@ -47,6 +46,7 @@ import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.GLDrawableFactory;
@@ -81,27 +81,27 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
         // become the pre-selector for X11/.. to match the native visual id w/ EGL, if native ES is selected
         final String nwType = NativeWindowFactory.getNativeWindowType(false);
         if(NativeWindowFactory.TYPE_X11 == nwType) {
-            nativeGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, eglFactory);
+            nativeGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, GLCapabilitiesImmutable.class, eglFactory);
         } /* else if(NativeWindowFactory.TYPE_WINDOWS == NativeWindowFactory.getNativeWindowType(false)) {
             nativeGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(javax.media.nativewindow.windows.WindowsGraphicsDevice.class, eglFactory);
         } else if(NativeWindowFactory.TYPE_MACOSX == NativeWindowFactory.getNativeWindowType(false)) {            
         } */
         
         // become the selector for KD/EGL ..
-        kdeglGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, eglFactory);
+        kdeglGraphicsConfigurationFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, GLCapabilitiesImmutable.class, eglFactory);
     }
     
     static void unregisterFactory() {
         final String nwType = NativeWindowFactory.getNativeWindowType(false);
         if(NativeWindowFactory.TYPE_X11 == nwType) {
-            GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, nativeGraphicsConfigurationFactory);                    
+            GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, GLCapabilitiesImmutable.class, nativeGraphicsConfigurationFactory);                    
         } /* else if(NativeWindowFactory.TYPE_WINDOWS == NativeWindowFactory.getNativeWindowType(false)) {
             GraphicsConfigurationFactory.registerFactory(javax.media.nativewindow.windows.WindowsGraphicsDevice.class, nativeGraphicsConfigurationFactory);
         } else if(NativeWindowFactory.TYPE_MACOSX == NativeWindowFactory.getNativeWindowType(false)) {            
         } */
         nativeGraphicsConfigurationFactory = null;
         
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, kdeglGraphicsConfigurationFactory);
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.egl.EGLGraphicsDevice.class, GLCapabilitiesImmutable.class, kdeglGraphicsConfigurationFactory);
         kdeglGraphicsConfigurationFactory = null;
     }
     
@@ -110,7 +110,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
 
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl (
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         if (absScreen == null) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only AbstractGraphicsDevice objects");
         }
@@ -140,7 +140,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             cfg = chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable) capsChosen,
                                                     (GLCapabilitiesImmutable) capsRequested,
                                                     (GLCapabilitiesChooser) chooser,
-                                                    absScreen, VisualIDHolder.VID_UNDEFINED, false);            
+                                                    absScreen, nativeVisualID, false);            
         } else {
             // handle non native cases (X11, ..) 
             if(null == nativeGraphicsConfigurationFactory) {
@@ -154,7 +154,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
                 cfg = chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable) capsChosen,
                                                         (GLCapabilitiesImmutable) capsRequested,
                                                         (GLCapabilitiesChooser) chooser,
-                                                        absScreen, VisualIDHolder.VID_UNDEFINED, false);
+                                                        absScreen, nativeVisualID, false);
                 if(null == cfg || VisualIDHolder.VID_UNDEFINED == cfg.getVisualID(VIDType.NATIVE)) {
                     cfg = null;
                     if(DEBUG) {
@@ -167,7 +167,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
                 if(DEBUG) {
                     System.err.println("EGLGraphicsConfigurationFactory.choose..: Delegate to "+nativeGraphicsConfigurationFactory.getClass().getSimpleName());
                 }
-                cfg = nativeGraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen);
+                cfg = nativeGraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen, nativeVisualID);
             }            
         }
         return cfg;
@@ -180,6 +180,9 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
         }
         EGLGraphicsDevice eglDevice = sharedResource.getDevice();
         long eglDisplay = eglDevice.getHandle();
+        if(0 == eglDisplay) {
+            throw new GLException("null eglDisplay");
+        }
 
         List<GLCapabilitiesImmutable> availableCaps = null;
         IntBuffer numConfigs = Buffers.newDirectIntBuffer(1);
@@ -223,32 +226,24 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             throw new GLException("Null AbstractGraphicsDevice");
         }
         
-        final long eglDisplay;
+        final EGLGraphicsDevice eglDevice;
         final boolean ownEGLDisplay;
-        if( !(absDevice instanceof EGLGraphicsDevice) ) {
-            eglDisplay = EGLDisplayUtil.eglGetDisplay(absDevice.getHandle());
-            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                throw new GLException("Could not get EGL display from: "+absDevice);
-            }
-            if (!EGLDisplayUtil.eglInitialize(eglDisplay, null, null)) {
-                throw new GLException("eglInitialize failed eglDisplay 0x"+Long.toHexString(eglDisplay)+", "+absDevice+", error 0x"+Integer.toHexString(EGL.eglGetError()));
-            }
-            ownEGLDisplay = true;
-        } else {
-            eglDisplay = absDevice.getHandle();
-            if (eglDisplay == EGL.EGL_NO_DISPLAY) {
-                throw new GLException("Invalid EGL display: "+absDevice);
+        if( absDevice instanceof EGLGraphicsDevice ) {
+            eglDevice = (EGLGraphicsDevice) absDevice;
+            if (eglDevice.getHandle() == EGL.EGL_NO_DISPLAY) {
+                throw new GLException("Invalid EGL display: "+eglDevice);
             }
             ownEGLDisplay = false;
+        } else {
+            eglDevice = EGLDisplayUtil.eglCreateEGLGraphicsDevice(absDevice.getHandle(), absDevice.getConnection(), absDevice.getUnitID());
+            ownEGLDisplay = true;
         }
 
-        EGLDrawableFactory factory = (EGLDrawableFactory) GLDrawableFactory.getEGLFactory();
-        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, factory.canCreateGLPbuffer(absDevice) );
-
-        GLProfile glp = capsChosen.getGLProfile();
-        GLCapabilities fixedCaps;
+        final GLProfile glp = capsChosen.getGLProfile();
+        final EGLDrawableFactory factory = (EGLDrawableFactory) GLDrawableFactory.getEGLFactory();
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLContext.isFBOAvailable(absDevice, glp), factory.canCreateGLPbuffer(absDevice) );
 
-        EGLGraphicsConfiguration res = eglChooseConfig(eglDisplay, capsChosen, capsReq, chooser, absScreen, nativeVisualID, forceTransparentFlag);
+        EGLGraphicsConfiguration res = eglChooseConfig(eglDevice.getHandle(), capsChosen, capsReq, chooser, absScreen, nativeVisualID, forceTransparentFlag);
         if(null==res) {
             if(DEBUG) {
                 System.err.println("eglChooseConfig failed with given capabilities "+capsChosen);
@@ -257,52 +252,67 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             // Last try .. add a fixed embedded profile [ATI, Nokia, Intel, ..]
             //
             // rgb888 - d16, s4
-            fixedCaps = new GLCapabilities(glp);
+            final GLCapabilities fixedCaps = new GLCapabilities(glp);
+            fixedCaps.setSampleBuffers(true);
+            fixedCaps.setNumSamples(4);
             fixedCaps.setRedBits(8);
             fixedCaps.setGreenBits(8);
             fixedCaps.setBlueBits(8);
             fixedCaps.setDepthBits(16);
-            fixedCaps.setSampleBuffers(true);
-            fixedCaps.setNumSamples(4);
+            if( !capsChosen.isOnscreen() ) {
+                fixedCaps.setOnscreen(false);
+                fixedCaps.setPBuffer(capsChosen.isPBuffer());
+                fixedCaps.setFBO(capsChosen.isFBO());
+            }            
             if(DEBUG) {
                 System.err.println("trying fixed caps (1): "+fixedCaps);
             }
-            res = eglChooseConfig(eglDisplay, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
+            res = eglChooseConfig(eglDevice.getHandle(), fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
         }
         if(null==res) {
             //
             // rgb565 - d16, s0
-            fixedCaps = new GLCapabilities(glp);
+            final GLCapabilities fixedCaps = new GLCapabilities(glp);
             fixedCaps.setRedBits(5);
             fixedCaps.setGreenBits(6);
             fixedCaps.setBlueBits(5);
             fixedCaps.setDepthBits(16);
+            if( !capsChosen.isOnscreen() ) {
+                fixedCaps.setOnscreen(false);
+                fixedCaps.setPBuffer(capsChosen.isPBuffer());
+                fixedCaps.setFBO(capsChosen.isFBO());
+            }            
             if(DEBUG) {
                 System.err.println("trying fixed caps (2): "+fixedCaps);
             }
-            res = eglChooseConfig(eglDisplay, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
+            res = eglChooseConfig(eglDevice.getHandle(), fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
         }
         if(null==res) {
             //
             // rgb565 - d16, s4
-            fixedCaps = new GLCapabilities(glp);
+            final GLCapabilities fixedCaps = new GLCapabilities(glp);
+            fixedCaps.setSampleBuffers(true);
+            fixedCaps.setNumSamples(4);
             fixedCaps.setRedBits(5);
             fixedCaps.setGreenBits(6);
             fixedCaps.setBlueBits(5);
             fixedCaps.setDepthBits(16);
-            fixedCaps.setSampleBuffers(true);
-            fixedCaps.setNumSamples(4);
+            if( !capsChosen.isOnscreen() ) {
+                fixedCaps.setOnscreen(false);
+                fixedCaps.setPBuffer(capsChosen.isPBuffer());
+                fixedCaps.setFBO(capsChosen.isFBO());
+            }            
             if(DEBUG) {
                 System.err.println("trying fixed caps (3): "+fixedCaps);
             }
-            res = eglChooseConfig(eglDisplay, fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
+            res = eglChooseConfig(eglDevice.getHandle(), fixedCaps, capsReq, chooser, absScreen, nativeVisualID, false);
         }
         if(null==res) {
             throw new GLException("Graphics configuration failed [direct caps, eglGetConfig/chooser and fixed-caps(1-3)]");
         }
         if(ownEGLDisplay) {
-            ((EGLGLCapabilities) res.getChosenCapabilities()).setEGLConfig(0); // eglDisplay: EOL 
-            EGLDisplayUtil.eglTerminate(eglDisplay);
+            ((EGLGLCapabilities) res.getChosenCapabilities()).setEGLConfig(0); // eglDisplay: EOL
+            eglDevice.close();
         }
         return res;
     }
@@ -315,7 +325,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
         final GLProfile glp = capsChosen.getGLProfile();
         final boolean onscreen = capsChosen.isOnscreen();
         final boolean usePBuffer = capsChosen.isPBuffer();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
+        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer, false);
         List<GLCapabilitiesImmutable> availableCaps = null;
         int recommendedIndex = -1;
         long recommendedEGLConfig = -1;
@@ -328,8 +338,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             throw new GLException("EGLGraphicsConfiguration.eglChooseConfig: Get maxConfigs (eglGetConfigs) no configs");
         }
         if (DEBUG) {
-            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: eglChooseConfig maxConfigs: "+numConfigs.get(0));
-            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: eglDisplay "+toHexString(eglDisplay)+", "+capsChosen+", nativeVisualID "+toHexString(nativeVisualID));
+            System.err.println("EGLGraphicsConfiguration.eglChooseConfig: eglChooseConfig eglDisplay "+toHexString(eglDisplay)+", nativeVisualID "+toHexString(nativeVisualID)+", onscreen "+onscreen+", usePBuffer "+usePBuffer+", "+capsChosen+", numConfigs "+numConfigs.get(0));
         }
 
         final IntBuffer attrs = Buffers.newDirectIntBuffer(EGLGraphicsConfiguration.GLCapabilities2AttribList(capsChosen));
@@ -368,7 +377,7 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
                 throw new GLException("EGLGraphicsConfiguration.eglChooseConfig: #2 Get all configs (eglGetConfigs) call failed, error "+toHexString(EGL.eglGetError()));
             }
             if (numConfigs.get(0) > 0) {
-                availableCaps = eglConfigs2GLCaps(glp, eglDisplay, configs, numConfigs.get(0), winattrmask, forceTransparentFlag);
+                availableCaps = eglConfigs2GLCaps(glp, eglDisplay, configs, numConfigs.get(0), winattrmask, forceTransparentFlag);                
             }
         }
 
@@ -376,6 +385,8 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             if(DEBUG) {
                 // FIXME: this happens on a ATI PC Emulation ..
                 System.err.println("EGLGraphicsConfiguration.eglChooseConfig: #2 Graphics configuration 1st choice and 2nd choice failed - no configs");
+                availableCaps = eglConfigs2GLCaps(glp, eglDisplay, configs, numConfigs.get(0), GLGraphicsConfigurationUtil.ALL_BITS, forceTransparentFlag);
+                printCaps("AllCaps", availableCaps, System.err);
             }
             return null;
         }
@@ -434,27 +445,5 @@ public class EGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFact
             out.println(prefix+"["+i+"] "+caps.get(i));
         }
     }
-
-    static EGLGraphicsConfiguration createOffscreenGraphicsConfiguration(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsReq, GLCapabilitiesChooser chooser) {
-        if(capsChosen.isOnscreen()) {
-            throw new GLException("Error: Onscreen set: "+capsChosen);
-        }
-
-        if(capsChosen.getDoubleBuffered()) {
-            // OFFSCREEN !DOUBLE_BUFFER // FIXME DBLBUFOFFSCRN
-            GLCapabilities caps2 = (GLCapabilities) capsChosen.cloneMutable();
-            caps2.setDoubleBuffered(false);
-            capsChosen = caps2;
-        }
-
-        DefaultGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
-        EGLGraphicsConfiguration eglConfig = chooseGraphicsConfigurationStatic(capsChosen, capsReq, chooser, screen, VisualIDHolder.VID_UNDEFINED, false);
-        if (null == eglConfig) {
-            throw new GLException("Couldn't create EGLGraphicsConfiguration from "+screen);
-        } else if(DEBUG) {
-            System.err.println("Chosen eglConfig: "+eglConfig);
-        }
-        return eglConfig;
-    }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java b/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java
index 3768f1588..d54057775 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLOnscreenDrawable.java
@@ -54,8 +54,8 @@ public class EGLOnscreenDrawable extends EGLDrawable {
     }
 
     @Override
-    protected long createSurface(long eglDpy, long eglNativeCfg, long surfaceHandle) {
-        return EGL.eglCreateWindowSurface(eglDpy, eglNativeCfg, surfaceHandle, null);
+    protected long createSurface(EGLGraphicsConfiguration config, long nativeSurfaceHandle) {
+        return EGL.eglCreateWindowSurface(config.getScreen().getDevice().getHandle(), config.getNativeConfig(), nativeSurfaceHandle, null);
     }
 }
 
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java b/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java
index b2217c095..4a36625bd 100644
--- a/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLPbufferDrawable.java
@@ -40,15 +40,11 @@
 
 package jogamp.opengl.egl;
 
-import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
-import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GLContext;
-import javax.media.opengl.GLException;
 
 public class EGLPbufferDrawable extends EGLDrawable {
-    private int texFormat;
     protected static final boolean useTexture = false; // No yet ..
 
     protected EGLPbufferDrawable(EGLDrawableFactory factory, NativeSurface target) {
@@ -56,30 +52,12 @@ public class EGLPbufferDrawable extends EGLDrawable {
     }
 
     @Override
-    protected long createSurface(long eglDpy, long eglNativeCfg, long surfaceHandle) {
-        final AbstractGraphicsConfiguration config = getNativeSurface().getGraphicsConfiguration();
-        final GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
-
-        if(useTexture) {
-            texFormat = caps.getAlphaBits() > 0 ? EGL.EGL_TEXTURE_RGBA : EGL.EGL_TEXTURE_RGB ;
-        } else {
-            texFormat = EGL.EGL_NO_TEXTURE;
-        }
-
-        if (DEBUG) {
-          System.out.println("Pbuffer config: " + config);
-        }
-
-        NativeSurface nw = getNativeSurface();
-        int[] attrs = EGLGraphicsConfiguration.CreatePBufferSurfaceAttribList(nw.getWidth(), nw.getHeight(), texFormat);
-        long surf = EGL.eglCreatePbufferSurface(eglDpy, eglNativeCfg, attrs, 0);
-        if (EGL.EGL_NO_SURFACE==surf) {
-            throw new GLException("Creation of window surface (eglCreatePbufferSurface) failed, dim "+nw.getWidth()+"x"+nw.getHeight()+", error 0x"+Integer.toHexString(EGL.eglGetError()));
-        } else if(DEBUG) {
-            System.err.println("PBuffer setSurface result: eglSurface 0x"+Long.toHexString(surf));
+    protected long createSurface(EGLGraphicsConfiguration config, long nativeSurfaceHandle) {
+        final MutableSurface ms = (MutableSurface)getNativeSurface();
+        if(config != ms.getGraphicsConfiguration()) {
+            throw new InternalError("Not same: "+config.hashCode()+", "+ms.getGraphicsConfiguration()+": "+config+", "+ms.getGraphicsConfiguration());
         }
-        ((SurfaceChangeable)nw).setSurfaceHandle(surf);
-        return surf;
+        return EGLDrawableFactory.createPBufferSurfaceImpl(ms, useTexture).getSurfaceHandle();
     }
 
     @Override
diff --git a/src/jogl/classes/jogamp/opengl/egl/EGLUpstreamSurfaceHook.java b/src/jogl/classes/jogamp/opengl/egl/EGLUpstreamSurfaceHook.java
new file mode 100644
index 000000000..42c6e100e
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/egl/EGLUpstreamSurfaceHook.java
@@ -0,0 +1,56 @@
+package jogamp.opengl.egl;
+
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.opengl.GLException;
+
+import com.jogamp.nativewindow.egl.EGLGraphicsDevice;
+
+public class EGLUpstreamSurfaceHook implements ProxySurface.UpstreamSurfaceHook {
+    private final NativeSurface upstreamSurface;
+    
+    public EGLUpstreamSurfaceHook(NativeSurface upstream) {
+        upstreamSurface = upstream;
+    }
+    
+    public final NativeSurface getUpstreamSurface() { return upstreamSurface; }
+    
+    @Override
+    public final void create(ProxySurface surface) {
+        if(upstreamSurface instanceof ProxySurface) {
+            ((ProxySurface)upstreamSurface).createNotify();
+            if(NativeSurface.LOCK_SURFACE_NOT_READY >= upstreamSurface.lockSurface()) {
+                throw new GLException("Could not lock: "+upstreamSurface);
+            }
+        }
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) surface.getGraphicsConfiguration().getScreen().getDevice();
+        eglDevice.open();
+    }
+
+    @Override
+    public final void destroy(ProxySurface surface) {
+        final EGLGraphicsDevice eglDevice = (EGLGraphicsDevice) surface.getGraphicsConfiguration().getScreen().getDevice();
+        eglDevice.close();
+        if(upstreamSurface instanceof ProxySurface) {
+            upstreamSurface.unlockSurface();
+            ((ProxySurface)upstreamSurface).destroyNotify();
+        }
+    }
+
+    @Override
+    public final int getWidth(ProxySurface s) {
+        return upstreamSurface.getWidth();
+    }
+
+    @Override
+    public final int getHeight(ProxySurface s) {
+        return upstreamSurface.getHeight();
+    }
+    
+    @Override
+    public String toString() {
+        final String us_s = null != upstreamSurface ? ( upstreamSurface.getClass().getName() + ": " + upstreamSurface ) : "nil"; 
+        return "EGLUpstreamSurfaceHook[upstream: "+us_s+"]";
+    }
+
+}
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
index aa66aa9d1..82525cfde 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
@@ -48,11 +48,13 @@ 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.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
+import jogamp.nativewindow.macosx.OSXUtil;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
@@ -63,6 +65,7 @@ import com.jogamp.common.os.Platform;
 import com.jogamp.common.util.VersionNumber;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLExtensions;
 
 public abstract class MacOSXCGLContext extends GLContextImpl
 {
@@ -252,9 +255,11 @@ public abstract class MacOSXCGLContext extends GLContextImpl
 
   @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);
     }
@@ -338,8 +343,8 @@ public abstract class MacOSXCGLContext extends GLContextImpl
 
   @Override
   public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals("GL_ARB_pbuffer") ||
-        glExtensionName.equals("GL_ARB_pixel_format")) {
+    if (glExtensionName.equals(GLExtensions.ARB_pbuffer) ||
+        glExtensionName.equals(GLExtensions.ARB_pixel_format)) {
       return true;
     }
     return super.isExtensionAvailable(glExtensionName);
@@ -426,10 +431,27 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     @Override
     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 long nsViewHandle;
+        if(drawable instanceof MacOSXCGLDrawable) {
+            // we allow null here! (special pbuffer case)
+            nsViewHandle = ((MacOSXCGLDrawable)MacOSXCGLContext.this.drawable).getNSViewHandle();
+        } else {
+            // we only allow a valid NSView here
+            final long aHandle = drawable.getHandle();
+            if( OSXUtil.isNSView(aHandle) ) {
+                nsViewHandle = aHandle;
+            } else {
+                throw new RuntimeException("Anonymous drawable instance's handle not of type NSView: "+drawable.getClass().getName()+", "+drawable);
+            }
+        }
+        final NativeSurface surface = drawable.getNativeSurface();        
         final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) surface.getGraphicsConfiguration();
         final OffscreenLayerSurface backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
+        
+        boolean allowIncompleteView = null != backingLayerHost;
+        if( !allowIncompleteView && surface instanceof ProxySurface ) {
+            allowIncompleteView = 0 != ( ProxySurface.INVISIBLE_WINDOW & ((ProxySurface)surface).getImplBitfield() ) ;
+        }
         final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
         long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(chosenCaps, ctp, major, minor);
         if (pixelFormat == 0) {
@@ -443,13 +465,13 @@ public abstract class MacOSXCGLContext extends GLContextImpl
         screenVSyncTimeout = 1000000f / sRefreshRate;
         if(DEBUG) {
             System.err.println("NS create OSX>=lion "+isLionOrLater);
-            System.err.println("NS create backendType: "+drawable.getOpenGLMode());
+            System.err.println("NS create allowIncompleteView: "+allowIncompleteView);
             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 drawable NSView-handle: "+toHexString(nsViewHandle));
             System.err.println("NS create screen refresh-rate: "+sRefreshRate+" hz, "+screenVSyncTimeout+" micros");
             // Thread.dumpStack();
         }
@@ -457,7 +479,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
           int[] viewNotReady = new int[1];
           // Try to allocate a context with this
           ctx = CGL.createContext(share,
-                                  drawable.getNSViewHandle(), null!=backingLayerHost,
+                                  nsViewHandle, allowIncompleteView,
                                   pixelFormat,
                                   chosenCaps.isBackgroundOpaque(),
                                   viewNotReady, 0);
@@ -473,10 +495,6 @@ public abstract class MacOSXCGLContext extends GLContextImpl
               CGL.setContextOpacity(ctx, 0);
           }
 
-          if(DEBUG) {
-              GLCapabilitiesImmutable caps0 = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(null, pixelFormat);
-              System.err.println("NS create pixelformat2GLCaps: "+caps0);
-          }
           GLCapabilitiesImmutable fixedCaps = MacOSXCGLGraphicsConfiguration.NSPixelFormat2GLCapabilities(chosenCaps.getGLProfile(), pixelFormat);
           fixedCaps = GLGraphicsConfigurationUtil.fixOpaqueGLCapabilities(fixedCaps, chosenCaps.isBackgroundOpaque());
           config.setChosenCapabilities(fixedCaps);
@@ -502,10 +520,10 @@ public abstract class MacOSXCGLContext extends GLContextImpl
                   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);
               }
+              nsOpenGLLayer = CGL.createNSOpenGLLayer(ctx, nsOpenGLLayerPFmt, drawable.getHandle(), fixedCaps.isBackgroundOpaque(), texWidth, texHeight);
               if (DEBUG) {
                   System.err.println("NS create nsOpenGLLayer "+toHexString(nsOpenGLLayer)+", texSize "+texWidth+"x"+texHeight+", "+drawable);
               }
@@ -528,11 +546,11 @@ public abstract class MacOSXCGLContext extends GLContextImpl
               System.err.println("NS destroy nsOpenGLLayer "+toHexString(nsOpenGLLayer));
           }
           final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
-          if(null == ols) {
-              throw new InternalError("XXX: "+ols);
+          if(null != ols && ols.isSurfaceLayerAttached()) {
+              // still having a valid OLS attached to surface (parent OLS could have been removed)
+              ols.detachSurfaceLayer();
           }
-          CGL.releaseNSOpenGLLayer(nsOpenGLLayer);
-          ols.detachSurfaceLayer(nsOpenGLLayer);
+          CGL.releaseNSOpenGLLayer(nsOpenGLLayer); 
           CGL.deletePixelFormat(nsOpenGLLayerPFmt);
           nsOpenGLLayerPFmt = 0;
           nsOpenGLLayer = 0;
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
index 257635b8c..af767f0c3 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
@@ -105,7 +105,7 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
   @Override
   protected void setRealizedImpl() {
   }
-
+  
   protected long getNSViewHandle() {
       return GLBackendType.NSOPENGL == openGLMode ? getHandle() : 0;
   }
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
index 4e9d18fed..9689d9f64 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
@@ -50,8 +50,8 @@ 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.ProxySurface.UpstreamSurfaceHook;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
@@ -62,15 +62,19 @@ import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.GLProfile.ShutdownType;
 
+import jogamp.nativewindow.macosx.OSXUtil;
 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 com.jogamp.common.JogampRuntimeException;
 import com.jogamp.common.util.ReflectionUtil;
 import com.jogamp.nativewindow.WrappedSurface;
 import com.jogamp.nativewindow.macosx.MacOSXGraphicsDevice;
+import com.jogamp.opengl.GLExtensions;
 
 public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   private static DesktopGLDynamicLookupHelper macOSXCGLDynamicLookupHelper = null;
@@ -214,44 +218,39 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
             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 GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, new GLCapabilities(glp), null, 64, 64));
+            sharedDrawable.setRealized(true);
+            
+            final GLContextImpl sharedContext  = (GLContextImpl) sharedDrawable.createContext(null);
+            if (null == sharedContext) {
+                throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
+            }
+            
+            try {
+                sharedContext.makeCurrent(); // could cause exception
+                madeCurrent = sharedContext.isCurrent();
+                if(madeCurrent) {
+                    GL gl = sharedContext.getGL();
+                    hasNPOTTextures = gl.isNPOTTextureAvailable();
+                    hasRECTTextures = gl.isExtensionAvailable(GLExtensions.EXT_texture_rectangle);
+                    hasAppleFloatPixels = gl.isExtensionAvailable(GLExtensions.APPLE_float_pixels);
+                }
+            } 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.setRealized(false);
             }
+            sharedDrawable.setRealized(false);
         }
         sr = new SharedResource(sharedDevice, madeCurrent, hasNPOTTextures, hasRECTTextures, hasAppleFloatPixels);
         synchronized(sharedMap) {
@@ -332,18 +331,82 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   @Override
-  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;
+  protected ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                  GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, 
+                                                  GLCapabilitiesChooser chooser, int width, int height, UpstreamSurfaceHook lifecycleHook) {
+    final MacOSXGraphicsDevice device;
+    if(createNewDevice) {
+        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, width, height, lifecycleHook);
   }
 
   @Override
-  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;
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                   GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    final GLCapabilitiesImmutable chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(requestedCaps);
+    return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser, width, height, dummySurfaceLifecycleHook); 
+  }  
+  private static final ProxySurface.UpstreamSurfaceHook dummySurfaceLifecycleHook = new ProxySurface.UpstreamSurfaceHook() {
+    long nsWindow = 0;
+    @Override
+    public final void create(ProxySurface s) {
+        if(0 == nsWindow && 0 == s.getSurfaceHandle()) {
+            nsWindow = OSXUtil.CreateNSWindow(0, 0, s.getWidth(), s.getHeight());
+            if(0 == nsWindow) {
+                throw new GLException("Error NS window 0");
+            }
+            long nsView = OSXUtil.GetNSView(nsWindow);
+            if(0 == nsView) {
+                throw new GLException("Error NS view 0");
+            }
+            s.setSurfaceHandle(nsView);
+            s.setImplBitfield(ProxySurface.INVISIBLE_WINDOW);
+            if(DEBUG) {
+                System.err.println("MacOSXCGLDrawableFactory.dummySurfaceLifecycleHook.create: "+s);
+            }
+        }
+    }
+    @Override
+    public final void destroy(ProxySurface s) {
+        if(0 != nsWindow && 0 != s.getSurfaceHandle()) {
+            OSXUtil.DestroyNSWindow(nsWindow);
+            nsWindow = 0;
+            s.setSurfaceHandle(0);
+            if(DEBUG) {
+                System.err.println("MacOSXCGLDrawableFactory.dummySurfaceLifecycleHook.destroy: "+s);
+            }
+        }
+    }
+    @Override
+    public final int getWidth(ProxySurface s) {
+        return s.initialWidth;
+    }
+    @Override
+    public final int getHeight(ProxySurface s) {
+        return s.initialHeight;
+    }
+    
+    @Override
+    public String toString() {
+       return "MacOSXLSurfaceLifecycleHook[]";
+    }
+    
+  };
+  
+  @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, 0, 0, upstream);
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
index 8393a688e..202644bb3 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfiguration.java
@@ -154,7 +154,7 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
                 break;
 
               case CGL.NSOpenGLPFASamples:
-                ivalues[idx] = caps.getSampleBuffers() ? ivalues[idx] = caps.getNumSamples() : 0;
+                ivalues[idx] = caps.getNumSamples() ;
                 break;
 
               default:
@@ -233,7 +233,7 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
       return fmt.get(0);
     }
     
-    static GLCapabilitiesImmutable CGLPixelFormat2GLCapabilities(long pixelFormat) {
+    static GLCapabilitiesImmutable CGLPixelFormat2GLCapabilities(long pixelFormat) {        
         return PixelFormat2GLCapabilities(null, pixelFormat, false);
     }
 
@@ -281,6 +281,7 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
             glp = GLProfile.get(GLProfile.GL2);
         }
         GLCapabilities caps = new GLCapabilities(glp);
+        int alphaBits = 0;
         for (int i = 0; i < len; i++) {
           int attr = cglInternalAttributeToken[i+off];
           switch (attr) {
@@ -317,7 +318,8 @@ 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 = ivalues[i];
                 break;
 
               case CGL.NSOpenGLPFADepthSize:
@@ -350,6 +352,7 @@ public class MacOSXCGLGraphicsConfiguration extends MutableGraphicsConfiguration
                 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..f138e7557 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLGraphicsConfigurationFactory.java
@@ -50,14 +50,14 @@ 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() {        
     }
 
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         return chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, absScreen, false);
     }
 
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
index ad4c06af2..6be9e386d 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXExternalCGLContext.java
@@ -114,8 +114,7 @@ public class MacOSXExternalCGLContext extends MacOSXCGLContext {
         // set a fake marker stating a valid drawable
         currentDrawable = 1;
     }
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(currentDrawable);
+    WrappedSurface ns = new WrappedSurface(cfg, currentDrawable, 64, 64, null);
     return new MacOSXExternalCGLContext(new Drawable(factory, ns), isNSContext, contextHandle);
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
index 242cea068..8f2f386af 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXPbufferCGLDrawable.java
@@ -42,7 +42,7 @@ package jogamp.opengl.macosx.cgl;
 
 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.GL2GL3;
@@ -94,11 +94,11 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
     registerContext(ctx);
     return ctx;
   }
-
+  
   @Override
   protected long getNSViewHandle() {
-      // pbuffer handle is NSOpenGLPixelBuffer
-      return 0;
+    // pbuffer handle is NSOpenGLPixelBuffer
+    return 0;
   }
 
   @Override
@@ -115,7 +115,7 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       NativeSurface ns = getNativeSurface();
       impl.destroy(pBuffer);
       this.pBuffer = 0;
-      ((SurfaceChangeable)ns).setSurfaceHandle(0);
+      ((MutableSurface)ns).setSurfaceHandle(0);
     }
   }
 
@@ -174,7 +174,7 @@ public class MacOSXPbufferCGLDrawable extends MacOSXCGLDrawable {
       throw new GLException("pbuffer creation error: CGL.createPBuffer() failed");
     }
 
-    ((SurfaceChangeable)ns).setSurfaceHandle(pBuffer);
+    ((MutableSurface)ns).setSurfaceHandle(pBuffer);
   }
 
   @Override
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..edf9b7c84 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/awt/MacOSXAWTCGLGraphicsConfigurationFactory.java
@@ -58,14 +58,14 @@ 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() {
     }
 
     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 +103,9 @@ 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/util/av/EGLMediaPlayerImpl.java b/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java
index 31f13297b..6bf8839af 100644
--- a/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java
+++ b/src/jogl/classes/jogamp/opengl/util/av/EGLMediaPlayerImpl.java
@@ -113,7 +113,7 @@ public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
             // create EGLImage from texture
             clientBuffer = null; // FIXME
             nioTmp.put(0, EGL.EGL_NONE);
-            image =  eglExt.eglCreateImageKHR( eglDrawable.getDisplay(), eglCtx.getHandle(),
+            image =  eglExt.eglCreateImageKHR( eglDrawable.getNativeSurface().getDisplayHandle(), eglCtx.getHandle(),
                                                EGLExt.EGL_GL_TEXTURE_2D_KHR,
                                                clientBuffer, nioTmp);
             if (0==image) {
@@ -130,7 +130,7 @@ public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
             // rendering the EGLImage texture before we tell OpenMAX to fill
             // it with a new frame.
             tmp[0] = EGL.EGL_NONE;
-            sync = eglExt.eglCreateSyncKHR(eglDrawable.getDisplay(), EGLExt.EGL_SYNC_FENCE_KHR, tmp, 0);
+            sync = eglExt.eglCreateSyncKHR(eglDrawable.getNativeSurface().getDisplayHandle(), EGLExt.EGL_SYNC_FENCE_KHR, tmp, 0);
             if (0==sync) {
                 throw new RuntimeException("EGLSync creation failed: "+EGL.eglGetError()+", ctx "+eglCtx+", err "+toHexString(EGL.eglGetError()));
             }
@@ -159,10 +159,10 @@ public abstract class EGLMediaPlayerImpl extends GLMediaPlayerImpl {
         final EGLTextureFrame eglTex = (EGLTextureFrame) imgTex;
         
         if(0!=eglTex.getImage()) {
-            eglExt.eglDestroyImageKHR(eglDrawable.getDisplay(), eglTex.getImage());
+            eglExt.eglDestroyImageKHR(eglDrawable.getNativeSurface().getDisplayHandle(), eglTex.getImage());
         }
         if(0!=eglTex.getSync()) {
-            eglExt.eglDestroySyncKHR(eglDrawable.getDisplay(), eglTex.getSync());
+            eglExt.eglDestroySyncKHR(eglDrawable.getNativeSurface().getDisplayHandle(), eglTex.getSync());
         }
         super.destroyTexImage(gl, imgTex);
     }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
index e255a0672..6a4ce5a4e 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WGLGLCapabilities.java
@@ -52,10 +52,11 @@ public class WGLGLCapabilities extends GLCapabilities {
   public boolean setValuesByGDI() {
       arb_pixelformat = -1;
 
+      // ALPHA shall be set at last - due to it's auto setting by !opaque / samples
       setRedBits(pfd.getCRedBits());
       setGreenBits(pfd.getCGreenBits());
       setBlueBits(pfd.getCBlueBits());
-      setAlphaBits(pfd.getCAlphaBits());
+      setAlphaBits(pfd.getCAlphaBits()); 
       setAccumRedBits(pfd.getCAccumRedBits());
       setAccumGreenBits(pfd.getCAccumGreenBits());
       setAccumBlueBits(pfd.getCAccumBlueBits());
@@ -77,6 +78,7 @@ public class WGLGLCapabilities extends GLCapabilities {
   public boolean setValuesByARB(final int[] iattribs, final int niattribs, final int[] iresults) {
       arb_pixelformat = 1;
 
+      int alphaBits = 0;
       for (int i = 0; i < niattribs; i++) {
           int attr = iattribs[i];
           switch (attr) {
@@ -143,7 +145,8 @@ public class WGLGLCapabilities extends GLCapabilities {
                   break;
 
               case WGLExt.WGL_ALPHA_BITS_ARB:
-                  setAlphaBits(iresults[i]);
+                  // ALPHA shall be set at last - due to it's auto setting by !opaque / samples
+                  alphaBits = iresults[i];
                   break;
 
               case WGLExt.WGL_ACCUM_RED_BITS_ARB:
@@ -174,6 +177,7 @@ public class WGLGLCapabilities extends GLCapabilities {
                   throw new GLException("Unknown pixel format attribute " + iattribs[i]);
           }
       }
+      setAlphaBits(alphaBits);
       return true;
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java
index 296d53ce3..cf6f43b1c 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsBitmapWGLDrawable.java
@@ -41,7 +41,7 @@
 package jogamp.opengl.windows.wgl;
 
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
@@ -139,7 +139,7 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
         hbitmap = 0;
       throw new GLException("Error creating device context for offscreen OpenGL context, werr "+werr);
     }
-    ((SurfaceChangeable)ns).setSurfaceHandle(hdc);
+    ((MutableSurface)ns).setSurfaceHandle(hdc);
     if(DEBUG) {
         System.err.println("WindowsBitmapWGLDrawable (2): "+ns);
     }
@@ -164,7 +164,7 @@ public class WindowsBitmapWGLDrawable extends WindowsWGLDrawable {
       GDI.DeleteDC(ns.getSurfaceHandle());
       origbitmap = 0;
       hbitmap = 0;
-      ((SurfaceChangeable)ns).setSurfaceHandle(0);
+      ((MutableSurface)ns).setSurfaceHandle(0);
     }
   }
 }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsDummyWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsDummyWGLDrawable.java
deleted file mode 100644
index 05d6d9862..000000000
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsDummyWGLDrawable.java
+++ /dev/null
@@ -1,109 +0,0 @@
-/*
- * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
- * Copyright (c) 2010 JogAmp Community. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- * - Redistribution of source code must retain the above copyright
- *   notice, this list of conditions and the following disclaimer.
- *
- * - Redistribution in binary form must reproduce the above copyright
- *   notice, this list of conditions and the following disclaimer in the
- *   documentation and/or other materials provided with the distribution.
- *
- * Neither the name of Sun Microsystems, Inc. or the names of
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * This software is provided "AS IS," without a warranty of any kind. ALL
- * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
- * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
- * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
- * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
- * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
- * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
- * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
- * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
- * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
- * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
- * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
- *
- * You acknowledge that this software is not designed or intended for use
- * in the design, construction, operation or maintenance of any nuclear
- * facility.
- *
- * Sun gratefully acknowledges that this software was originally authored
- * and developed by Kenneth Bradley Russell and Christopher John Kline.
- */
-
-package jogamp.opengl.windows.wgl;
-
-import javax.media.nativewindow.AbstractGraphicsScreen;
-import javax.media.nativewindow.NativeSurface;
-import javax.media.opengl.GLCapabilities;
-import javax.media.opengl.GLContext;
-import javax.media.opengl.GLDrawableFactory;
-import javax.media.opengl.GLException;
-import javax.media.opengl.GLProfile;
-
-import jogamp.nativewindow.windows.GDI;
-import jogamp.nativewindow.windows.GDISurface;
-import jogamp.nativewindow.windows.GDIUtil;
-
-public class WindowsDummyWGLDrawable extends WindowsWGLDrawable {
-  private long hwnd;
-  private boolean handleHwndLifecycle;
-
-  private WindowsDummyWGLDrawable(GLDrawableFactory factory, GDISurface ns, boolean handleHwndLifecycle) {
-    super(factory, ns, true);
-    this.handleHwndLifecycle = handleHwndLifecycle;
-
-    if(NativeSurface.LOCK_SURFACE_NOT_READY >= ns.lockSurface()) {
-        throw new GLException("WindowsDummyWGLDrawable: surface not ready (lockSurface)");
-    }
-    try {
-        WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)ns.getGraphicsConfiguration();
-        config.updateGraphicsConfiguration(factory, ns, null);
-        if (DEBUG) {
-          System.err.println("WindowsDummyWGLDrawable: "+config);
-        }
-    } catch (Throwable t) {
-        setRealized(false);
-        throw new GLException(t);
-    } finally {
-        unlockSurface();
-    }
-  }
-
-  public static WindowsDummyWGLDrawable create(GLDrawableFactory factory, GLProfile glp, AbstractGraphicsScreen absScreen,
-                                               long windowHandle, int width, int height, boolean handleWindowLifecycle) {
-    if(0 == windowHandle) {
-        throw new GLException("Error windowHandle 0, werr: "+GDI.GetLastError());
-    }
-    GLCapabilities caps = new GLCapabilities(glp);
-    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(caps, absScreen);
-    GDISurface ns = new GDISurface(cfg, windowHandle);
-    ns.surfaceSizeChanged(width, height);
-    return new WindowsDummyWGLDrawable(factory, ns, handleWindowLifecycle);
-  }
-
-  @Override
-  public GLContext createContext(GLContext shareWith) {
-    // FIXME: figure out how to hook back in the Java 2D / JOGL bridge
-    return new WindowsWGLContext(this, shareWith);
-  }
-
-  @Override
-  protected void setRealizedImpl() {
-    super.setRealizedImpl();
-    if(!realized) {
-        if (handleHwndLifecycle && hwnd != 0) {
-          GDI.ShowWindow(hwnd, GDI.SW_HIDE);
-          GDIUtil.DestroyDummyWindow(hwnd);
-          hwnd = 0;
-        }
-    }
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java
index 86441c688..96c1187d3 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLContext.java
@@ -55,7 +55,6 @@ import com.jogamp.nativewindow.WrappedSurface;
 import jogamp.nativewindow.windows.GDI;
 import jogamp.opengl.GLContextShareSet;
 
-
 public class WindowsExternalWGLContext extends WindowsWGLContext {
   private GLContext lastContext;
 
@@ -103,7 +102,7 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
             System.err.println("WindowsExternalWGLContext valid hdc/pfd, retrieved cfg: " + cfg);
         }
     }
-    return new WindowsExternalWGLContext(new Drawable(factory, new WrappedSurface(cfg, hdc)), ctx, cfg);
+    return new WindowsExternalWGLContext(new Drawable(factory, new WrappedSurface(cfg, hdc, 64, 64, null)), ctx, cfg);
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java
index 8f22aa60e..15bd005dc 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsExternalWGLDrawable.java
@@ -50,6 +50,7 @@ import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
 import jogamp.nativewindow.windows.GDI;
+import jogamp.nativewindow.windows.GDIUtil;
 
 import com.jogamp.nativewindow.WrappedSurface;
 
@@ -69,9 +70,9 @@ public class WindowsExternalWGLDrawable extends WindowsWGLDrawable {
       throw new GLException("Error: attempted to make an external GLContext without a valid pixelformat, werr " + GDI.GetLastError());
     }
 
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
-    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.createFromExternal(factory, hdc, pfdID, glp, aScreen, true);
-    return new WindowsExternalWGLDrawable(factory, new WrappedSurface(cfg, hdc));
+    final AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
+    final WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.createFromExternal(factory, hdc, pfdID, glp, aScreen, true);
+    return new WindowsExternalWGLDrawable(factory, new WrappedSurface(cfg, hdc, 64, 64, null));
   }
 
 
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java
index a11d6e78e..7dda6a1f1 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLContext.java
@@ -42,6 +42,8 @@ package jogamp.opengl.windows.wgl;
 
 import javax.media.opengl.*;
 
+import com.jogamp.opengl.GLExtensions;
+
 import jogamp.opengl.GLContextImpl;
 
 public class WindowsPbufferWGLContext extends WindowsWGLContext {
@@ -112,7 +114,7 @@ public class WindowsPbufferWGLContext extends WindowsWGLContext {
         } else {
           hasRTT = true;
 
-          if (rect && !gl.isExtensionAvailable("GL_NV_texture_rectangle")) {
+          if (rect && !gl.isExtensionAvailable(GLExtensions.NV_texture_rectangle)) {
             System.err.println("WindowsPbufferWGLContext: WARNING: GL_NV_texture_rectangle extension not " +
                                "supported; skipping requested render_to_texture_rectangle support for pbuffer");
             rect = false;
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java
index b00c796ec..175622343 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsPbufferWGLDrawable.java
@@ -42,7 +42,7 @@ package jogamp.opengl.windows.wgl;
 
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowException;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
@@ -92,7 +92,7 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
           if (wglExt.wglReleasePbufferDCARB(buffer, ns.getSurfaceHandle()) == 0) {
             throw new GLException("Error releasing pbuffer device context: error code " + GDI.GetLastError());
           }
-          ((SurfaceChangeable)ns).setSurfaceHandle(0);
+          ((MutableSurface)ns).setSurfaceHandle(0);
         }
         if (!wglExt.wglDestroyPbufferARB(buffer)) {
             throw new GLException("Error destroying pbuffer: error code " + GDI.GetLastError());
@@ -121,7 +121,7 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
     }
     try {
         long sharedHdc = sharedSurface.getSurfaceHandle();
-        WGLExt wglExt = sharedResource.getContext().getWGLExt();
+        WGLExt wglExt = ((WindowsWGLContext)sharedResource.getContext()).getWGLExt();
 
         if (DEBUG) {
             System.out.println("Pbuffer config: " + config);
@@ -131,7 +131,6 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
         float[] fattributes = new float[1];
         int[]   floatModeTmp = new int[1];
         int     niattribs   = 0;
-        int     width, height;
 
         GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable)config.getChosenCapabilities();
         GLProfile glProfile = chosenCaps.getGLProfile();
@@ -206,7 +205,7 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
                 iattributes[niattribs++] = WGLExt.WGL_MIPMAP_TEXTURE_ARB;
                 iattributes[niattribs++] = GL.GL_FALSE;
 
-                iattributes[niattribs++] = WGLExt.WGL_PBUFFER_LARGEST_ARB;
+                iattributes[niattribs++] = WGLExt.WGL_PBUFFER_LARGEST_ARB; // exact
                 iattributes[niattribs++] = GL.GL_FALSE;
               }
 
@@ -235,7 +234,7 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
         NativeSurface ns = getNativeSurface();
         // Set up instance variables
         buffer = tmpBuffer;
-        ((SurfaceChangeable)ns).setSurfaceHandle(tmpHdc);
+        ((MutableSurface)ns).setSurfaceHandle(tmpHdc);
         cachedWGLExt = wglExt;
 
         // Re-query chosen pixel format
@@ -249,14 +248,6 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
           }
           config.setCapsPFD(newCaps);
         }
-
-        // Determine the actual width and height we were able to create.
-        int[] tmp = new int[1];
-        wglExt.wglQueryPbufferARB( buffer, WGLExt.WGL_PBUFFER_WIDTH_ARB,  tmp, 0 );
-        width = tmp[0];
-        wglExt.wglQueryPbufferARB( buffer, WGLExt.WGL_PBUFFER_HEIGHT_ARB, tmp, 0 );
-        height = tmp[0];
-        ((SurfaceChangeable)ns).surfaceSizeChanged(width, height);
     } finally {
         sharedSurface.unlockSurface();
     }
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
index f143c158b..8825bad0a 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLContext.java
@@ -53,6 +53,8 @@ import javax.media.opengl.GLCapabilitiesImmutable;
 
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLExtensions;
+
 import jogamp.nativewindow.windows.GDI;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableImpl;
@@ -77,8 +79,8 @@ public class WindowsWGLContext extends GLContextImpl {
     functionNameMap.put("glFreeMemoryNV", "wglFreeMemoryNV");
 
     extensionNameMap = new HashMap<String, String>();
-    extensionNameMap.put("GL_ARB_pbuffer", "WGL_ARB_pbuffer");
-    extensionNameMap.put("GL_ARB_pixel_format", "WGL_ARB_pixel_format");
+    extensionNameMap.put(GLExtensions.ARB_pbuffer, WindowsWGLDrawableFactory.WGL_ARB_pbuffer);
+    extensionNameMap.put(GLExtensions.ARB_pixel_format, WindowsWGLDrawableFactory.WGL_ARB_pixel_format);
   }
 
   // FIXME: figure out how to hook back in the Java 2D / JOGL bridge
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
index 176d27a71..09e97ff79 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLDrawableFactory.java
@@ -51,9 +51,10 @@ 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.ProxySurface.UpstreamSurfaceHook;
 import javax.media.opengl.GL;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
@@ -67,9 +68,11 @@ import jogamp.nativewindow.windows.GDISurface;
 import jogamp.nativewindow.windows.GDIUtil;
 import jogamp.nativewindow.windows.RegisteredClassFactory;
 import jogamp.opengl.DesktopGLDynamicLookupHelper;
+import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.SharedResourceRunner;
 
 import com.jogamp.common.JogampRuntimeException;
@@ -79,6 +82,7 @@ import com.jogamp.common.util.ReflectionUtil;
 import com.jogamp.common.util.VersionNumber;
 import com.jogamp.nativewindow.WrappedSurface;
 import com.jogamp.nativewindow.windows.WindowsGraphicsDevice;
+import com.jogamp.opengl.GLExtensions;
 
 public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   private static DesktopGLDynamicLookupHelper windowsWGLDynamicLookupHelper = null;
@@ -203,8 +207,8 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   static class SharedResource implements SharedResourceRunner.Resource {
       private WindowsGraphicsDevice device;
       private AbstractGraphicsScreen screen;
-      private WindowsDummyWGLDrawable drawable;
-      private WindowsWGLContext context;
+      private GLDrawableImpl drawable;
+      private GLContextImpl context;
       private boolean hasARBPixelFormat;
       private boolean hasARBMultisample;
       private boolean hasARBPBuffer;
@@ -214,7 +218,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
       private boolean isVendorNVIDIA;
       private boolean needsCurrenContext4ARBPFDQueries;
 
-      SharedResource(WindowsGraphicsDevice dev, AbstractGraphicsScreen scrn, WindowsDummyWGLDrawable draw, WindowsWGLContext ctx,
+      SharedResource(WindowsGraphicsDevice dev, AbstractGraphicsScreen scrn, GLDrawableImpl draw, GLContextImpl ctx,
                      boolean arbPixelFormat, boolean arbMultisample, boolean arbPBuffer, boolean arbReadDrawable, String glVendor) {
           device = dev;
           screen = scrn;
@@ -250,9 +254,9 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
       @Override
       final public AbstractGraphicsScreen getScreen() { return screen; }
       @Override
-      final public WindowsWGLDrawable getDrawable() { return drawable; }
+      final public GLDrawableImpl getDrawable() { return drawable; }
       @Override
-      final public WindowsWGLContext getContext() { return context; }
+      final public GLContextImpl getContext() { return context; }
 
       final boolean hasARBPixelFormat() { return hasARBPixelFormat; }
       final boolean hasARBMultisample() { return hasARBMultisample; }
@@ -302,21 +306,18 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
 
         @Override
         public SharedResourceRunner.Resource createSharedResource(String connection) {
-            WindowsGraphicsDevice sharedDevice = new WindowsGraphicsDevice(connection, AbstractGraphicsDevice.DEFAULT_UNIT);
+            final WindowsGraphicsDevice sharedDevice = new WindowsGraphicsDevice(connection, AbstractGraphicsDevice.DEFAULT_UNIT);
             sharedDevice.lock();
             try {
-                AbstractGraphicsScreen absScreen = new DefaultGraphicsScreen(sharedDevice, 0);
-                GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
+                final AbstractGraphicsScreen absScreen = new DefaultGraphicsScreen(sharedDevice, 0);
+                final GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
                 if (null == glp) {
                     throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
                 }
-                final int f_dim = 64;
-                long hwnd = GDIUtil.CreateDummyWindow(0, 0, f_dim, f_dim);
-                WindowsDummyWGLDrawable sharedDrawable = WindowsDummyWGLDrawable.create(WindowsWGLDrawableFactory.this, glp, absScreen, hwnd, f_dim, f_dim, true);
-                if (null == sharedDrawable) {
-                    throw new GLException("Couldn't create shared drawable for screen: "+absScreen+", "+glp);
-                }
-                WindowsWGLContext sharedContext  = (WindowsWGLContext) sharedDrawable.createContext(null);
+                final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, new GLCapabilities(glp), null, 64, 64));
+                sharedDrawable.setRealized(true);
+                                
+                final GLContextImpl sharedContext  = (GLContextImpl) sharedDrawable.createContext(null);
                 if (null == sharedContext) {
                     throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
                 }
@@ -329,7 +330,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
                 try {
                     hasARBPixelFormat = sharedContext.isExtensionAvailable(WGL_ARB_pixel_format);
                     hasARBMultisample = sharedContext.isExtensionAvailable(WGL_ARB_multisample);
-                    hasARBPBuffer = sharedContext.isExtensionAvailable(GL_ARB_pbuffer);
+                    hasARBPBuffer = sharedContext.isExtensionAvailable(GLExtensions.ARB_pbuffer);
                     hasARBReadDrawableAvailable = sharedContext.isExtensionAvailable(WGL_ARB_make_current_read) &&
                                             sharedContext.isFunctionAvailable(wglMakeContextCurrent);
                     vendor = sharedContext.getGL().glGetString(GL.GL_VENDOR);
@@ -401,7 +402,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
       return false;
   }
 
-  final static String GL_ARB_pbuffer = "GL_ARB_pbuffer";
+  final static String WGL_ARB_pbuffer      = "WGL_ARB_pbuffer";
   final static String WGL_ARB_pixel_format = "WGL_ARB_pixel_format";
   final static String WGL_ARB_multisample = "WGL_ARB_multisample";
   final static String WGL_NV_float_buffer = "WGL_NV_float_buffer";
@@ -534,22 +535,89 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   @Override
-  protected final NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice device, GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, int width, int height) {
-    AbstractGraphicsScreen screen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
-    WrappedSurface ns = new WrappedSurface(WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-                                     capsChosen, capsRequested, chooser, screen) );
-    ns.surfaceSizeChanged(width, height);
-    return ns;
+  protected final ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                        GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested, 
+                                                        GLCapabilitiesChooser chooser, int width, int height, UpstreamSurfaceHook lifecycleHook) {
+    final WindowsGraphicsDevice device;
+    if(createNewDevice) {
+        device = new WindowsGraphicsDevice(deviceReq.getConnection(), deviceReq.getUnitID());
+    } else {
+        device = (WindowsGraphicsDevice)deviceReq;
+    }
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+    final WindowsWGLGraphicsConfiguration config = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen); 
+    }    
+    return new WrappedSurface(config, 0, width, height, lifecycleHook);
   }
 
   @Override
-  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice adevice, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-    // FIXME device/windowHandle -> screen ?!
-    WindowsGraphicsDevice device = (WindowsGraphicsDevice) adevice;
-    AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
-    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen);
-    GDISurface ns = new GDISurface(cfg, windowHandle);
-    return ns;
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                   GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    final WindowsGraphicsDevice device;
+    if(createNewDevice) {
+        device = new WindowsGraphicsDevice(deviceReq.getConnection(), deviceReq.getUnitID());
+    } else {
+        device = (WindowsGraphicsDevice)deviceReq;
+    }
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, 0);
+    final GLCapabilitiesImmutable chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(requestedCaps);
+    final WindowsWGLGraphicsConfiguration config = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(chosenCaps, requestedCaps, chooser, screen);
+    if(null == config) { 
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+requestedCaps+" on "+screen);
+    }    
+    return new GDISurface(config, 0, width, height, dummySurfaceLifecycleHook);
+  }  
+  private static final ProxySurface.UpstreamSurfaceHook dummySurfaceLifecycleHook = new ProxySurface.UpstreamSurfaceHook() {
+    @Override
+    public final void create(ProxySurface s) {
+        final GDISurface ms = (GDISurface)s;
+        if(0 == ms.getWindowHandle()) {            
+            final long windowHandle = GDIUtil.CreateDummyWindow(0, 0, s.getWidth(), s.getHeight());
+            if(0 == windowHandle) {
+                throw new GLException("Error windowHandle 0, werr: "+GDI.GetLastError());
+            }    
+            ms.setWindowHandle(windowHandle);
+            if(DEBUG) {
+                System.err.println("WindowsWGLDrawableFactory.dummySurfaceLifecycleHook.create: "+ms);
+            }
+        }
+    }
+    @Override
+    public final void destroy(ProxySurface s) {
+        final GDISurface ms = (GDISurface)s;
+        if(0 != ms.getWindowHandle()) {
+            GDI.ShowWindow(ms.getWindowHandle(), GDI.SW_HIDE);
+            GDIUtil.DestroyDummyWindow(ms.getWindowHandle());
+            ms.setWindowHandle(0);
+            if(DEBUG) {
+                System.err.println("WindowsWGLDrawableFactory.dummySurfaceLifecycleHook.destroy: "+ms);
+            }
+        }
+    }
+    @Override
+    public final int getWidth(ProxySurface s) {
+        return s.initialWidth;
+    }
+    @Override
+    public final int getHeight(ProxySurface s) {
+        return s.initialHeight;
+    }
+    
+    @Override
+    public String toString() {
+       return "GDISurfaceLifecycleHook[]";
+    }
+  };
+  
+  
+  @Override
+  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final WindowsGraphicsDevice device = new WindowsGraphicsDevice(deviceReq.getConnection(), deviceReq.getUnitID());
+    final AbstractGraphicsScreen screen = new DefaultGraphicsScreen(device, screenIdx);
+    final WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen);
+    return new GDISurface(cfg, windowHandle, 0, 0, upstream);
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java
index 408d8b074..209589b29 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfiguration.java
@@ -48,11 +48,13 @@ import javax.media.opengl.GLPbuffer;
 import javax.media.opengl.GLProfile;
 
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
+import com.jogamp.opengl.GLExtensions;
 
 import jogamp.nativewindow.windows.DWM_BLURBEHIND;
 import jogamp.nativewindow.windows.GDI;
 import jogamp.nativewindow.windows.MARGINS;
 import jogamp.nativewindow.windows.PIXELFORMATDESCRIPTOR;
+import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 
 public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguration implements Cloneable {    
@@ -160,7 +162,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         }
     
         if (!WGLUtil.SetPixelFormat(hdc, caps.getPFDID(), caps.getPFD())) {
-            throw new GLException("Unable to set pixel format " + caps +
+            throw new GLException("Unable to set pixel format " + caps.getPFDID() + " of " + caps +
                                   " for device context " + toHexString(hdc) +
                                   ": error code " + GDI.GetLastError());
         }
@@ -250,7 +252,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
         }
             
         if(sharedResource.hasARBPBuffer()) {
-            WindowsWGLContext sharedCtx = sharedResource.getContext();
+            GLContextImpl sharedCtx = sharedResource.getContext();
             if(null != sharedCtx && sharedCtx.isExtensionAvailable(WindowsWGLDrawableFactory.WGL_NV_float_buffer)) {
                 // pbo float buffer
                 iattributes[niattribs++] = WGLExt.WGL_FLOAT_COMPONENTS_NV; // nvidia
@@ -313,12 +315,12 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
 
         int niattribs = fillAttribsForGeneralWGLARBQuery(sharedResource, iattributes);
 
-        if (!sharedResource.getContext().getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdID, 0, niattribs, iattributes, 0, iresults, 0)) {
+        if (!((WindowsWGLContext)sharedResource.getContext()).getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdID, 0, niattribs, iattributes, 0, iresults, 0)) {
             throw new GLException("wglARBPFID2GLCapabilities: Error getting pixel format attributes for pixel format " + pfdID + 
                                   " of device context " + toHexString(hdc) + ", werr " + GDI.GetLastError());
         }
         List<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>(1);
-        final int winattrbits = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
+        final int winattrbits = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer, false);
         if(AttribList2GLCapabilities(bucket, glp, hdc, pfdID, iattributes, niattribs, iresults, winattrbits)) {
             return (WGLGLCapabilities) bucket.get(0);
         }
@@ -342,7 +344,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
 
         int[] pformatsTmp = new int[WindowsWGLGraphicsConfiguration.MAX_PFORMATS];
         int[] numFormatsTmp = new int[1];
-        if ( !sharedResource.getContext().getWGLExt().wglChoosePixelFormatARB(hdc, iattributes, 0,
+        if ( !((WindowsWGLContext)sharedResource.getContext()).getWGLExt().wglChoosePixelFormatARB(hdc, iattributes, 0,
                                                                 fattributes, 0,
                                                                 WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
                                                                 pformatsTmp, 0, numFormatsTmp, 0))
@@ -374,7 +376,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
 
     static List<GLCapabilitiesImmutable> wglARBPFIDs2GLCapabilities(WindowsWGLDrawableFactory.SharedResource sharedResource,
                                                                     long hdc, int[] pfdIDs, GLProfile glp, boolean onscreen, boolean usePBuffer) {
-        final int winattrbits = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
+        final int winattrbits = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer, false);
         return wglARBPFIDs2GLCapabilitiesImpl(sharedResource, hdc, pfdIDs, glp, winattrbits);
     }
 
@@ -398,7 +400,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
 
         for(int i = 0; i<numFormats; i++) {
             if ( pfdIDs[i] >= 1 &&
-                 sharedResource.getContext().getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdIDs[i], 0, niattribs, iattributes, 0, iresults, 0) ) {
+                 ((WindowsWGLContext)sharedResource.getContext()).getWGLExt().wglGetPixelFormatAttribivARB(hdc, pfdIDs[i], 0, niattribs, iattributes, 0, iresults, 0) ) {
                 AttribList2GLCapabilities(bucket, glp, hdc, pfdIDs[i], iattributes, niattribs, iresults, winattrbits);
             } else if (DEBUG) {
                 System.err.println("wglARBPFIDs2GLCapabilities: Cannot get pixel format attributes for pixel format " +
@@ -507,9 +509,9 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
             throw new GLException("Render-to-texture-rectangle requires render-to-texture to be specified");
           }
 
-          WindowsWGLContext sharedCtx = sharedResource.getContext();
+          GLContextImpl sharedCtx = sharedResource.getContext();
           if (rect) {
-            if (!sharedCtx.isExtensionAvailable("GL_NV_texture_rectangle")) {
+            if (!sharedCtx.isExtensionAvailable(GLExtensions.NV_texture_rectangle)) {
               throw new GLException("Render-to-texture-rectangle requires GL_NV_texture_rectangle extension");
             }
           }
@@ -658,7 +660,7 @@ public class WindowsWGLGraphicsConfiguration extends MutableGraphicsConfiguratio
     }
 
     static WGLGLCapabilities PFD2GLCapabilities(GLProfile glp, long hdc, int pfdID, boolean onscreen) {
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, false);
+        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, false, false);
         List<GLCapabilitiesImmutable> capsBucket = new ArrayList<GLCapabilitiesImmutable>(1);
         if( PFD2GLCapabilities(capsBucket, glp, hdc, pfdID, winattrmask) ) {
             return (WGLGLCapabilities) capsBucket.get(0);
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
index 850b64aa8..00ed91bb4 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
@@ -52,6 +52,7 @@ import javax.media.opengl.GLProfile;
 
 import jogamp.nativewindow.windows.GDI;
 import jogamp.nativewindow.windows.PIXELFORMATDESCRIPTOR;
+import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLGraphicsConfigurationFactory;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 
@@ -68,13 +69,13 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
     static VisualIDHolder.VIDComparator PfdIDComparator = new VisualIDHolder.VIDComparator(VisualIDHolder.VIDType.WIN32_PFD);
 
     static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.windows.WindowsGraphicsDevice.class, new WindowsWGLGraphicsConfigurationFactory());
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.windows.WindowsGraphicsDevice.class, GLCapabilitiesImmutable.class, new WindowsWGLGraphicsConfigurationFactory());
     }
     private WindowsWGLGraphicsConfigurationFactory() {
     }
 
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
-            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
 
         if (! (capsChosen instanceof GLCapabilitiesImmutable) ) {
             throw new IllegalArgumentException("This NativeWindowFactory accepts only GLCapabilities objects - chosen");
@@ -99,10 +100,10 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
         if(null==absScreen) {
             absScreen = DefaultGraphicsScreen.createDefault(NativeWindowFactory.TYPE_WINDOWS);
         }
-        AbstractGraphicsDevice absDevice = absScreen.getDevice();
-
+        final AbstractGraphicsDevice absDevice = absScreen.getDevice();
+        final GLDrawableFactory factory = GLDrawableFactory.getDesktopFactory();
         capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities(
-                capsChosen, GLDrawableFactory.getDesktopFactory().canCreateGLPbuffer(absDevice) );
+                capsChosen, GLContext.isFBOAvailable(absDevice, capsChosen.getGLProfile()), factory.canCreateGLPbuffer(absDevice) );
 
         return new WindowsWGLGraphicsConfiguration( absScreen, capsChosen, capsReq, (GLCapabilitiesChooser)chooser );
     }
@@ -112,9 +113,9 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
         if(null == sharedResource) {
             throw new GLException("Shared resource for device n/a: "+device);
         }
-        WindowsWGLDrawable sharedDrawable = sharedResource.getDrawable();
+        GLDrawableImpl sharedDrawable = sharedResource.getDrawable();
         GLCapabilitiesImmutable capsChosen = sharedDrawable.getChosenGLCapabilities();
-        WindowsWGLContext sharedContext = sharedResource.getContext();
+        GLContext sharedContext = sharedResource.getContext();
         List<GLCapabilitiesImmutable> availableCaps = null;
         
         if ( sharedResource.needsCurrentContext4ARBPFDQueries() ) {
@@ -150,7 +151,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
     }
 
     static List<GLCapabilitiesImmutable> getAvailableGLCapabilitiesARB(long hdc, WindowsWGLDrawableFactory.SharedResource sharedResource, GLProfile glProfile) {
-        int[] pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFIDs(sharedResource.getContext(), hdc);
+        int[] pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFIDs((WindowsWGLContext)sharedResource.getContext(), hdc);
         return WindowsWGLGraphicsConfiguration.wglARBPFIDs2AllGLCapabilities(sharedResource, hdc, pformats, glProfile);
     }
 
@@ -265,7 +266,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
         }
         AbstractGraphicsDevice device = config.getScreen().getDevice();
         WindowsWGLDrawableFactory.SharedResource sharedResource = ((WindowsWGLDrawableFactory)factory).getOrCreateSharedResource(device);
-        WindowsWGLContext sharedContext = null;
+        GLContext sharedContext = null;
         if (null != sharedResource && sharedResource.needsCurrentContext4ARBPFDQueries()) {
             sharedContext = sharedResource.getContext();
             if(GLContext.CONTEXT_NOT_CURRENT == sharedContext.makeCurrent()) {
@@ -355,7 +356,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
                         System.err.println("updateGraphicsConfigurationARB: wglChoosePixelFormatARB failed with: "+capsChosen);
                     }
                     // 2nd choice: get all GLCapabilities available, no preferred recommendedIndex available
-                    pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFIDs(sharedResource.getContext(), hdc);
+                    pformats = WindowsWGLGraphicsConfiguration.wglAllARBPFIDs((WindowsWGLContext)sharedResource.getContext(), hdc);
                     if (DEBUG) {
                         final int len = ( null != pformats ) ? pformats.length : 0;
                         System.err.println("updateGraphicsConfigurationARB: NumFormats (wglAllARBPFIDs) " + len);
@@ -451,7 +452,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GLGraphicsConfigurat
             if(null == pformats) {
                 pformats = WindowsWGLGraphicsConfiguration.wglAllGDIPFIDs(hdc);
             }
-            final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, false);
+            final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, false, false);
 
             for (int i = 0; i < pformats.length; i++) {
                 WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(availableCaps, glProfile, hdc, pformats[i], winattrmask);
diff --git a/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
index bd64b58a4..3b2ff133a 100644
--- a/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/windows/wgl/awt/WindowsAWTWGLGraphicsConfigurationFactory.java
@@ -63,14 +63,14 @@ import javax.media.opengl.GLDrawableFactory;
 
 public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigurationFactory {
     public static void registerFactory() {
-        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, new WindowsAWTWGLGraphicsConfigurationFactory());
+        GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.awt.AWTGraphicsDevice.class, GLCapabilitiesImmutable.class, new WindowsAWTWGLGraphicsConfigurationFactory());
     }
     private WindowsAWTWGLGraphicsConfigurationFactory() {        
     }
 
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
             CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested,
-            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         GraphicsDevice device = null;
         if (absScreen != null &&
             !(absScreen instanceof AWTGraphicsScreen)) {
@@ -105,11 +105,11 @@ public class WindowsAWTWGLGraphicsConfigurationFactory extends GLGraphicsConfigu
 
         WindowsGraphicsDevice winDevice = new WindowsGraphicsDevice(AbstractGraphicsDevice.DEFAULT_UNIT);
         DefaultGraphicsScreen winScreen = new DefaultGraphicsScreen(winDevice, awtScreen.getIndex());
-        GraphicsConfigurationFactory configFactory = GraphicsConfigurationFactory.getFactory(winDevice);
+        GraphicsConfigurationFactory configFactory = GraphicsConfigurationFactory.getFactory(winDevice, capsChosen);
         WindowsWGLGraphicsConfiguration winConfig = (WindowsWGLGraphicsConfiguration)
                                                        configFactory.chooseGraphicsConfiguration(capsChosen,
                                                                                                  capsRequested,
-                                                                                                 chooser, winScreen);
+                                                                                                 chooser, winScreen, nativeVisualID);
         if (winConfig == null) {
             throw new GLException("Unable to choose a GraphicsConfiguration: "+capsChosen+",\n\t"+chooser+"\n\t"+winScreen);
         }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11DummyGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11DummyGLXDrawable.java
deleted file mode 100644
index 8914e2db9..000000000
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11DummyGLXDrawable.java
+++ /dev/null
@@ -1,102 +0,0 @@
-/**
- * Copyright 2010 JogAmp Community. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without modification, are
- * permitted provided that the following conditions are met:
- *
- *    1. Redistributions of source code must retain the above copyright notice, this list of
- *       conditions and the following disclaimer.
- *
- *    2. Redistributions in binary form must reproduce the above copyright notice, this list
- *       of conditions and the following disclaimer in the documentation and/or other materials
- *       provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
- * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
- * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * The views and conclusions contained in the software and documentation are those of the
- * authors and should not be interpreted as representing official policies, either expressed
- * or implied, of JogAmp Community.
- */
-
-package jogamp.opengl.x11.glx;
-
-import javax.media.opengl.GLCapabilities;
-import javax.media.opengl.GLCapabilitiesImmutable;
-import javax.media.opengl.GLDrawableFactory;
-import javax.media.opengl.GLProfile;
-
-import jogamp.nativewindow.x11.X11Lib;
-
-import com.jogamp.nativewindow.WrappedSurface;
-import com.jogamp.nativewindow.x11.X11GraphicsDevice;
-import com.jogamp.nativewindow.x11.X11GraphicsScreen;
-
-public class X11DummyGLXDrawable extends X11OnscreenGLXDrawable {
-  private static final int f_dim = 64;
-  private long dummyWindow = 0;
-
-  /**
-   * Due to the ATI Bug https://bugzilla.mozilla.org/show_bug.cgi?id=486277,
-   * we cannot switch the Display as we please,
-   * hence we reuse the target's screen configuration.
-   */
-  public X11DummyGLXDrawable(X11GraphicsScreen screen, GLDrawableFactory factory, GLCapabilitiesImmutable caps) {
-    super(factory,
-          new WrappedSurface(X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-            caps, caps, null, screen)));
-    this.realized = true;
-
-    WrappedSurface ns = (WrappedSurface) getNativeSurface();
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)ns.getGraphicsConfiguration();
-
-    X11GraphicsDevice device = (X11GraphicsDevice) screen.getDevice();
-    long dpy = device.getHandle();
-    int scrn = screen.getIndex();
-    int visualID = config.getXVisualID();
-
-    dummyWindow = X11Lib.CreateDummyWindow(dpy, scrn, visualID, f_dim, f_dim);
-    ns.setSurfaceHandle( dummyWindow );
-    ns.surfaceSizeChanged(f_dim, f_dim);
-
-    updateHandle();
-  }
-
-  public static X11DummyGLXDrawable create(X11GraphicsScreen screen, GLDrawableFactory factory, GLProfile glp) {
-      GLCapabilities caps = new GLCapabilities(glp);
-      return new X11DummyGLXDrawable(screen, factory, caps);
-  }
-
-  public void setSize(int width, int height) {
-  }
-
-  @Override
-  public int getWidth() {
-    return 1;
-  }
-
-  @Override
-  public int getHeight() {
-    return 1;
-  }
-  
-  
-  @Override
-  protected void setRealizedImpl() {
-    super.setRealizedImpl();
-    if(!realized) {
-        if(0!=dummyWindow) {
-            destroyHandle();
-            X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)getNativeSurface().getGraphicsConfiguration();
-            X11Lib.DestroyDummyWindow(config.getScreen().getDevice().getHandle(), dummyWindow);
-        }
-    }
-  }
-}
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
index 53776386c..1f3edbd8a 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXContext.java
@@ -41,6 +41,7 @@
 package jogamp.opengl.x11.glx;
 
 import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.VisualIDHolder;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
@@ -76,8 +77,15 @@ public class X11ExternalGLXContext extends X11GLXContext {
     long drawable = GLX.glXGetCurrentDrawable();
     if (drawable == 0) {
       throw new GLException("Error: attempted to make an external GLDrawable without a drawable/context current");
-    }
+    }    
     int[] val = new int[1];
+    
+    int w, h;
+    GLX.glXQueryDrawable(display, drawable, GLX.GLX_WIDTH, val, 0);
+    w=val[0];
+    GLX.glXQueryDrawable(display, drawable, GLX.GLX_HEIGHT, val, 0);
+    h=val[0];
+    
     GLX.glXQueryContext(display, ctx, GLX.GLX_SCREEN, val, 0);
     X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val[0], false);
 
@@ -87,9 +95,9 @@ public class X11ExternalGLXContext extends X11GLXContext {
     // of 0, which doesn't work in a subsequent call to glXChooseFBConfig; if this happens,
     // create and use a default config (this has been observed when running on CentOS 5.5 inside
     // of VMWare Server 2.0 with the Mesa 6.5.1 drivers)
-    if( X11GLXGraphicsConfiguration.GLXFBConfigIDValid(display, x11Screen.getIndex(), val[0]) ) {
+    if( VisualIDHolder.VID_UNDEFINED == val[0] || !X11GLXGraphicsConfiguration.GLXFBConfigIDValid(display, x11Screen.getIndex(), val[0]) ) {
         GLCapabilities glcapsDefault = new GLCapabilities(GLProfile.getDefault());
-        cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(glcapsDefault, glcapsDefault, null, x11Screen);
+        cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(glcapsDefault, glcapsDefault, null, x11Screen, VisualIDHolder.VID_UNDEFINED);
         if(DEBUG) {
             System.err.println("X11ExternalGLXContext invalid FBCONFIG_ID "+val[0]+", using default cfg: " + cfg);
         }
@@ -97,8 +105,7 @@ public class X11ExternalGLXContext extends X11GLXContext {
         cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val[0]);
     }
 
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(drawable);
+    final WrappedSurface ns = new WrappedSurface(cfg, drawable, w, h, null);
     return new X11ExternalGLXContext(new Drawable(factory, ns), ctx);
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java
index 3fabe7a13..8652e2d4a 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11ExternalGLXDrawable.java
@@ -87,10 +87,7 @@ public class X11ExternalGLXDrawable extends X11GLXDrawable {
         System.err.println("X11ExternalGLXDrawable: WARNING: forcing GLX_RGBA_TYPE for newly created contexts (current 0x"+Integer.toHexString(val[0])+")");
       }
     }
-    WrappedSurface ns = new WrappedSurface(cfg);
-    ns.setSurfaceHandle(drawable);
-    ns.surfaceSizeChanged(w, h);
-    return new X11ExternalGLXDrawable(factory, ns);
+    return new X11ExternalGLXDrawable(factory, new WrappedSurface(cfg, drawable, w, h, null));
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
index 0afadc677..e1e25be67 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXContext.java
@@ -61,6 +61,7 @@ import jogamp.opengl.GLDrawableImpl;
 import com.jogamp.common.nio.Buffers;
 import com.jogamp.gluegen.runtime.ProcAddressTable;
 import com.jogamp.gluegen.runtime.opengl.GLProcAddressResolver;
+import com.jogamp.opengl.GLExtensions;
 
 public abstract class X11GLXContext extends GLContextImpl {
   private static final Map<String, String> functionNameMap;
@@ -83,8 +84,8 @@ public abstract class X11GLXContext extends GLContextImpl {
     functionNameMap.put("glFreeMemoryNV", "glXFreeMemoryNV");
 
     extensionNameMap = new HashMap<String, String>();
-    extensionNameMap.put("GL_ARB_pbuffer",      "GLX_SGIX_pbuffer");
-    extensionNameMap.put("GL_ARB_pixel_format", "GLX_SGIX_pbuffer"); // good enough
+    extensionNameMap.put(GLExtensions.ARB_pbuffer,      X11GLXDrawableFactory.GLX_SGIX_pbuffer);
+    extensionNameMap.put(GLExtensions.ARB_pixel_format, X11GLXDrawableFactory.GLX_SGIX_pbuffer); // good enough
   }
 
   X11GLXContext(GLDrawableImpl drawable,
@@ -151,7 +152,7 @@ public abstract class X11GLXContext extends GLContextImpl {
             throw new InternalError("Given readDrawable but no driver support");
         }
     } catch (RuntimeException re) {
-        if(TRACE_SWITCH) {
+        if(DEBUG || TRACE_SWITCH) {
           System.err.println(getThreadName()+": Warning: X11GLXContext.glXMakeContextCurrent failed: "+re+", with "+
             "dpy "+toHexString(dpy)+
             ", write "+toHexString(writeDrawable)+
@@ -508,8 +509,8 @@ public abstract class X11GLXContext extends GLContextImpl {
 
   @Override
   public boolean isExtensionAvailable(String glExtensionName) {
-    if (glExtensionName.equals("GL_ARB_pbuffer") ||
-        glExtensionName.equals("GL_ARB_pixel_format")) {
+    if (glExtensionName.equals(GLExtensions.ARB_pbuffer) ||
+        glExtensionName.equals(GLExtensions.ARB_pixel_format)) {
       return getGLDrawable().getFactory().canCreateGLPbuffer(
           drawable.getNativeSurface().getGraphicsConfiguration().getScreen().getDevice() );
     }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
index 9a563bdb8..b2e74f9d4 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXDrawableFactory.java
@@ -49,6 +49,9 @@ import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.ProxySurface.UpstreamSurfaceHook;
+import javax.media.nativewindow.VisualIDHolder;
+import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
@@ -64,6 +67,7 @@ import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
+import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.SharedResourceRunner;
 
 import com.jogamp.common.util.VersionNumber;
@@ -79,6 +83,8 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   public static final VersionNumber versionOneThree = new VersionNumber(1, 3, 0);
   public static final VersionNumber versionOneFour = new VersionNumber(1, 4, 0);
 
+  static final String GLX_SGIX_pbuffer = "GLX_SGIX_pbuffer";
+  
   private static DesktopGLDynamicLookupHelper x11GLXDynamicLookupHelper = null;
 
   public X11GLXDrawableFactory() {
@@ -153,8 +159,8 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   static class SharedResource implements SharedResourceRunner.Resource {
       X11GraphicsDevice device;
       X11GraphicsScreen screen;
-      X11DummyGLXDrawable drawable;
-      X11GLXContext context;
+      GLDrawableImpl drawable;
+      GLContextImpl context;
       String glXServerVendorName;
       boolean isGLXServerVendorATI;
       boolean isGLXServerVendorNVIDIA;
@@ -164,7 +170,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
       boolean glXMultisampleAvailable;
 
       SharedResource(X11GraphicsDevice dev, X11GraphicsScreen scrn,
-                     X11DummyGLXDrawable draw, X11GLXContext ctx,
+                     GLDrawableImpl draw, GLContextImpl ctx,
                      VersionNumber glXServerVer, String glXServerVendor, boolean glXServerMultisampleAvail) {
           device = dev;
           screen = scrn;
@@ -224,13 +230,15 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
 
         @Override
         public SharedResourceRunner.Resource createSharedResource(String connection) {
-            X11GraphicsDevice sharedDevice =
+            final X11GraphicsDevice sharedDevice =
                     new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT,
-                                          true); // own non-shared display connection, no locking
+                                          true); // own non-shared display connection, w/ locking
                     // new X11GraphicsDevice(X11Util.openDisplay(connection), AbstractGraphicsDevice.DEFAULT_UNIT,
-                    //                       NativeWindowFactory.getNullToolkitLock(), true); // own non-shared display connection, no locking
+                    //                       NativeWindowFactory.getNullToolkitLock(), true); // own non-shared display connection, w/o locking
             sharedDevice.lock();
             try {
+                final X11GraphicsScreen sharedScreen = new X11GraphicsScreen(sharedDevice, 0);
+                
                 if(!GLXUtil.isGLXAvailableOnServer(sharedDevice)) {
                     throw new GLException("GLX not available on device/server: "+sharedDevice);
                 }
@@ -242,20 +250,20 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
                     X11Util.setMarkAllDisplaysUnclosable(true);
                     X11Util.markDisplayUncloseable(sharedDevice.getHandle());
                 }
-                X11GraphicsScreen sharedScreen = new X11GraphicsScreen(sharedDevice, 0);
-
-                GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
+                
+                final GLProfile glp = GLProfile.get(sharedDevice, GLProfile.GL_PROFILE_LIST_MIN_DESKTOP, false);
                 if (null == glp) {
                     throw new GLException("Couldn't get default GLProfile for device: "+sharedDevice);
                 }
-                X11DummyGLXDrawable sharedDrawable = X11DummyGLXDrawable.create(sharedScreen, X11GLXDrawableFactory.this, glp);
-                if (null == sharedDrawable) {
-                    throw new GLException("Couldn't create shared drawable for screen: "+sharedScreen+", "+glp);
-                }
-                X11GLXContext sharedContext = (X11GLXContext) sharedDrawable.createContext(null);
+                
+                final GLDrawableImpl sharedDrawable = createOnscreenDrawableImpl(createDummySurfaceImpl(sharedDevice, false, new GLCapabilities(glp), null, 64, 64));
+                sharedDrawable.setRealized(true);
+                
+                final GLContextImpl sharedContext = (GLContextImpl) sharedDrawable.createContext(null);
                 if (null == sharedContext) {
                     throw new GLException("Couldn't create shared context for drawable: "+sharedDrawable);
                 }
+                
                 boolean madeCurrent = false;
                 sharedContext.makeCurrent();
                 try {
@@ -298,7 +306,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
 
             if (null != sr.context) {
                 // may cause JVM SIGSEGV:
-                sr.context.destroy();
+                sr.context.destroy(); // will also pull the dummy MutuableSurface
                 sr.context = null;
             }
 
@@ -394,7 +402,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
     }
-    return new X11OnscreenGLXDrawable(this, target);
+    return new X11OnscreenGLXDrawable(this, target, false);
   }
 
   @Override
@@ -495,40 +503,98 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl {
   }
 
   @Override
-  protected final NativeSurface createOffscreenSurfaceImpl(AbstractGraphicsDevice deviceReq,
-                                                           GLCapabilitiesImmutable capsChosen, GLCapabilitiesImmutable capsRequested,
-                                                           GLCapabilitiesChooser chooser,
-                                                           int width, int height) {
-    if(null == deviceReq) {
-        throw new InternalError("deviceReq is null");
-    }
-    final SharedResourceRunner.Resource sr = sharedResourceRunner.getOrCreateShared(deviceReq);
-    if(null==sr) {
-        throw new InternalError("No SharedResource for: "+deviceReq);
+  protected final ProxySurface createMutableSurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                        GLCapabilitiesImmutable capsChosen,
+                                                        GLCapabilitiesImmutable capsRequested,
+                                                        GLCapabilitiesChooser chooser, int width, int height, UpstreamSurfaceHook lifecycleHook) {
+    final X11GraphicsDevice device;
+    if(createNewDevice) {
+        // Null X11 locking, due to private non-shared Display handle
+        device = new X11GraphicsDevice(X11Util.openDisplay(deviceReq.getConnection()), deviceReq.getUnitID(), NativeWindowFactory.getNullToolkitLock(), true);
+    } else {
+        device = (X11GraphicsDevice)deviceReq;
     }
-    final X11GraphicsScreen sharedScreen = (X11GraphicsScreen) sr.getScreen();
-    final AbstractGraphicsDevice sharedDevice = sharedScreen.getDevice(); // should be same ..
-
-    // create screen/device pair - Null X11 locking, due to private non-shared Display handle
-    final X11GraphicsDevice device = new X11GraphicsDevice(X11Util.openDisplay(sharedDevice.getConnection()), AbstractGraphicsDevice.DEFAULT_UNIT, NativeWindowFactory.getNullToolkitLock(), true);
-    final X11GraphicsScreen screen = new X11GraphicsScreen(device, sharedScreen.getIndex());
-
-    WrappedSurface ns = new WrappedSurface(
-               X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen) );
-    if(ns != null) {
-        ns.surfaceSizeChanged(width, height);
+    final X11GraphicsScreen screen = new X11GraphicsScreen(device, 0);
+    final X11GLXGraphicsConfiguration config = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsChosen, capsRequested, chooser, screen, VisualIDHolder.VID_UNDEFINED);
+    if(null == config) {
+        throw new GLException("Choosing GraphicsConfiguration failed w/ "+capsChosen+" on "+screen); 
     }
-    return ns;
+    return new WrappedSurface( config, 0, width, height, lifecycleHook);
   }
 
   @Override
-  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice adevice, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser) {
-    // FIXME device/windowHandle -> screen ?!
-    X11GraphicsDevice device = (X11GraphicsDevice) adevice;
-    X11GraphicsScreen screen = new X11GraphicsScreen(device, 0);
-    X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen);
-    WrappedSurface ns = new WrappedSurface(cfg, windowHandle);
-    return ns;
+  public final ProxySurface createDummySurfaceImpl(AbstractGraphicsDevice deviceReq, boolean createNewDevice, 
+                                                   GLCapabilitiesImmutable requestedCaps, GLCapabilitiesChooser chooser, int width, int height) {
+    final GLCapabilitiesImmutable chosenCaps = GLGraphicsConfigurationUtil.fixOnscreenGLCapabilities(requestedCaps);
+    return createMutableSurfaceImpl(deviceReq, createNewDevice, chosenCaps, requestedCaps, chooser, width, height, dummySurfaceLifecycleHook); 
+  }  
+  private static final ProxySurface.UpstreamSurfaceHook dummySurfaceLifecycleHook = new ProxySurface.UpstreamSurfaceHook() {
+    @Override
+    public final void create(ProxySurface s) {
+        if( 0 == s.getSurfaceHandle() ) {
+            final X11GLXGraphicsConfiguration cfg = (X11GLXGraphicsConfiguration) s.getGraphicsConfiguration();
+            final X11GraphicsScreen screen = (X11GraphicsScreen) cfg.getScreen();
+            final X11GraphicsDevice device = (X11GraphicsDevice) screen.getDevice();
+            if(0 == device.getHandle()) {
+                device.open();
+                s.setImplBitfield(ProxySurface.OWN_DEVICE);
+            }
+            final long windowHandle = X11Lib.CreateDummyWindow(device.getHandle(), screen.getIndex(), cfg.getXVisualID(), s.getWidth(), s.getHeight());
+            if(0 == windowHandle) {
+                throw new GLException("Creating dummy window failed w/ "+cfg+", "+s.getWidth()+"x"+s.getHeight());
+            }
+            s.setSurfaceHandle(windowHandle);
+            if(DEBUG) {
+                System.err.println("X11GLXDrawableFactory.dummySurfaceLifecycleHook.create: "+s);
+            }
+        }
+    }
+    @Override
+    public final void destroy(ProxySurface s) {
+        if(0 != s.getSurfaceHandle()) {
+            final X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration) s.getGraphicsConfiguration();
+            final X11GraphicsDevice device = (X11GraphicsDevice) config.getScreen().getDevice();
+            X11Lib.DestroyDummyWindow(device.getHandle(), s.getSurfaceHandle());            
+            s.setSurfaceHandle(0);
+            if( 0 != ( ProxySurface.OWN_DEVICE & s.getImplBitfield() ) ) {
+                device.close();
+            }
+            if(DEBUG) {
+                System.err.println("X11GLXDrawableFactory.dummySurfaceLifecycleHook.destroy: "+s);
+            }
+        }
+    }
+    @Override
+    public final int getWidth(ProxySurface s) {
+        return s.initialWidth;
+    }
+    @Override
+    public final int getHeight(ProxySurface s) {
+        return s.initialHeight;
+    }
+    @Override
+    public String toString() {
+       return "X11SurfaceLifecycleHook[]";
+    }
+  };
+  
+  
+  @Override
+  protected final ProxySurface createProxySurfaceImpl(AbstractGraphicsDevice deviceReq, int screenIdx, long windowHandle, GLCapabilitiesImmutable capsRequested, GLCapabilitiesChooser chooser, UpstreamSurfaceHook upstream) {
+    final X11GraphicsDevice device = new X11GraphicsDevice(X11Util.openDisplay(deviceReq.getConnection()), deviceReq.getUnitID(), NativeWindowFactory.getNullToolkitLock(), true);
+    final X11GraphicsScreen screen = new X11GraphicsScreen(device, screenIdx);
+    final int xvisualID = X11Lib.GetVisualIDFromWindow(device.getHandle(), windowHandle);
+    if(VisualIDHolder.VID_UNDEFINED == xvisualID) {
+        throw new GLException("Undefined VisualID of window 0x"+Long.toHexString(windowHandle)+", window probably invalid");
+    }
+    if(DEBUG) {
+        System.err.println("X11GLXDrawableFactory.createProxySurfaceImpl 0x"+Long.toHexString(windowHandle)+": visualID 0x"+Integer.toHexString(xvisualID));
+    }
+    final X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(capsRequested, capsRequested, chooser, screen, xvisualID);
+    if(DEBUG) {
+        System.err.println("X11GLXDrawableFactory.createProxySurfaceImpl 0x"+Long.toHexString(windowHandle)+": "+cfg);
+    }
+    return new WrappedSurface(cfg, windowHandle, 0, 0, upstream);
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java
index b54b5150c..b458fffe1 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfiguration.java
@@ -36,12 +36,16 @@ package jogamp.opengl.x11.glx;
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
+import javax.media.nativewindow.VisualIDHolder;
 import javax.media.opengl.DefaultGLCapabilitiesChooser;
 import javax.media.opengl.GL;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
@@ -67,7 +71,8 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     }
 
     static X11GLXGraphicsConfiguration create(GLProfile glp, X11GraphicsScreen x11Screen, int fbcfgID) {
-      final long display = x11Screen.getDevice().getHandle();
+      final AbstractGraphicsDevice device = x11Screen.getDevice();
+      final long display = device.getHandle();
       if(0==display) {
           throw new GLException("Display null of "+x11Screen);
       }
@@ -80,7 +85,7 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         glp = GLProfile.getDefault(x11Screen.getDevice());
       }
       final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
-      final X11GLCapabilities caps = GLXFBConfig2GLCapabilities(glp, display, fbcfg, true, true, true, factory.isGLXMultisampleAvailable(x11Screen.getDevice()));
+      final X11GLCapabilities caps = GLXFBConfig2GLCapabilities(glp, device, fbcfg, true, true, true, factory.isGLXMultisampleAvailable(device));
       if(null==caps) {
           throw new GLException("GLCapabilities null of "+toHexString(fbcfg));
       }
@@ -99,16 +104,25 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     }
 
     void updateGraphicsConfiguration() {
-        X11GLXGraphicsConfiguration newConfig = (X11GLXGraphicsConfiguration)
-            GraphicsConfigurationFactory.getFactory(getScreen().getDevice()).chooseGraphicsConfiguration(
-                getChosenCapabilities(), getRequestedCapabilities(), chooser, getScreen());
-        if(null!=newConfig) {
-            // FIXME: setScreen( ... );
-            setXVisualInfo(newConfig.getXVisualInfo());
-            setChosenCapabilities(newConfig.getChosenCapabilities());
-            if(DEBUG) {
-                System.err.println("updateGraphicsConfiguration: "+this);
+        final CapabilitiesImmutable aChosenCaps = getChosenCapabilities();
+        if( !(aChosenCaps instanceof X11GLCapabilities) || VisualIDHolder.VID_UNDEFINED == aChosenCaps.getVisualID(VIDType.X11_XVISUAL) ) {
+            // This case is actually quite impossible, since on X11 the visualID and hence GraphicsConfiguration 
+            // must be determined _before_ window creation! 
+            final X11GLXGraphicsConfiguration newConfig = (X11GLXGraphicsConfiguration)
+                GraphicsConfigurationFactory.getFactory(getScreen().getDevice(), aChosenCaps).chooseGraphicsConfiguration(
+                    aChosenCaps, getRequestedCapabilities(), chooser, getScreen(), VisualIDHolder.VID_UNDEFINED);
+            if(null!=newConfig) {
+                // FIXME: setScreen( ... );
+                setXVisualInfo(newConfig.getXVisualInfo());
+                setChosenCapabilities(newConfig.getChosenCapabilities());
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.updateGraphicsConfiguration updated:"+this);
+                }
+            } else {
+                throw new GLException("No native VisualID pre-chosen and update failed: "+this);
             }
+        } else if (DEBUG) {
+            System.err.println("X11GLXGraphicsConfiguration.updateGraphicsConfiguration kept:"+this);
         }
     }
 
@@ -233,11 +247,11 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     return true;
   }
 
-  static int FBCfgDrawableTypeBits(final long display, final long fbcfg) {
+  static int FBCfgDrawableTypeBits(final AbstractGraphicsDevice device, GLProfile glp, final long fbcfg) {
     int val = 0;
 
     int[] tmp = new int[1];
-    int fbtype = glXGetFBConfig(display, fbcfg, GLX.GLX_DRAWABLE_TYPE, tmp, 0);
+    int fbtype = glXGetFBConfig(device.getHandle(), fbcfg, GLX.GLX_DRAWABLE_TYPE, tmp, 0);
 
     if ( 0 != ( fbtype & GLX.GLX_WINDOW_BIT ) ) {
         val |= GLGraphicsConfigurationUtil.WINDOW_BIT;
@@ -248,17 +262,20 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     if ( 0 != ( fbtype & GLX.GLX_PBUFFER_BIT ) ) {
         val |= GLGraphicsConfigurationUtil.PBUFFER_BIT;
     }
+    if ( GLContext.isFBOAvailable(device, glp) ) {
+        val |= GLGraphicsConfigurationUtil.FBO_BIT;
+    }
     return val;
   }
 
-  static X11GLCapabilities GLXFBConfig2GLCapabilities(GLProfile glp, long display, long fbcfg,
+  static X11GLCapabilities GLXFBConfig2GLCapabilities(GLProfile glp, AbstractGraphicsDevice device, long fbcfg,
                                                             boolean relaxed, boolean onscreen, boolean usePBuffer,
                                                             boolean isMultisampleAvailable) {
     ArrayList<GLCapabilitiesImmutable> bucket = new ArrayList<GLCapabilitiesImmutable>();
-    final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-    if( GLXFBConfig2GLCapabilities(bucket, glp, display, fbcfg, winattrmask, isMultisampleAvailable) ) {
+    final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer, false);
+    if( GLXFBConfig2GLCapabilities(bucket, glp, device, fbcfg, winattrmask, isMultisampleAvailable) ) {
         return (X11GLCapabilities) bucket.get(0);
-    } else if ( relaxed && GLXFBConfig2GLCapabilities(bucket, glp, display, fbcfg, GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
+    } else if ( relaxed && GLXFBConfig2GLCapabilities(bucket, glp, device, fbcfg, GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
         return (X11GLCapabilities) bucket.get(0);
     }
     return null;
@@ -273,11 +290,12 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
   }
 
   static boolean GLXFBConfig2GLCapabilities(List<GLCapabilitiesImmutable> capsBucket,
-                                            GLProfile glp, long display, long fbcfg,
+                                            GLProfile glp, AbstractGraphicsDevice device, long fbcfg,
                                             int winattrmask, boolean isMultisampleAvailable) {
-    final int allDrawableTypeBits = FBCfgDrawableTypeBits(display, fbcfg);
+    final int allDrawableTypeBits = FBCfgDrawableTypeBits(device, glp,  fbcfg);
     int drawableTypeBits = winattrmask & allDrawableTypeBits;
-
+    
+    final long display = device.getHandle(); 
     int fbcfgid = X11GLXGraphicsConfiguration.glXFBConfig2FBConfigID(display, fbcfg);
     XVisualInfo visualInfo = GLX.glXGetVisualFromFBConfig(display, fbcfg);
     if(null == visualInfo) {
@@ -301,19 +319,6 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     }
 
     GLCapabilities res = new X11GLCapabilities(visualInfo, fbcfg, fbcfgid, glp);
-    res.setDoubleBuffered(glXGetFBConfig(display, fbcfg, GLX.GLX_DOUBLEBUFFER,     tmp, 0) != 0);
-    res.setStereo        (glXGetFBConfig(display, fbcfg, GLX.GLX_STEREO,           tmp, 0) != 0);
-    res.setHardwareAccelerated(glXGetFBConfig(display, fbcfg, GLX.GLX_CONFIG_CAVEAT, tmp, 0) != GLX.GLX_SLOW_CONFIG);
-    res.setDepthBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_DEPTH_SIZE,       tmp, 0));
-    res.setStencilBits   (glXGetFBConfig(display, fbcfg, GLX.GLX_STENCIL_SIZE,     tmp, 0));
-    res.setRedBits       (glXGetFBConfig(display, fbcfg, GLX.GLX_RED_SIZE,         tmp, 0));
-    res.setGreenBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_GREEN_SIZE,       tmp, 0));
-    res.setBlueBits      (glXGetFBConfig(display, fbcfg, GLX.GLX_BLUE_SIZE,        tmp, 0));
-    res.setAlphaBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_ALPHA_SIZE,       tmp, 0));
-    res.setAccumRedBits  (glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_RED_SIZE,   tmp, 0));
-    res.setAccumGreenBits(glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_GREEN_SIZE, tmp, 0));
-    res.setAccumBlueBits (glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_BLUE_SIZE,  tmp, 0));
-    res.setAccumAlphaBits(glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_ALPHA_SIZE, tmp, 0));
     if (isMultisampleAvailable) {
       res.setSampleBuffers(glXGetFBConfig(display, fbcfg, GLX.GLX_SAMPLE_BUFFERS, tmp, 0) != 0);
       res.setNumSamples   (glXGetFBConfig(display, fbcfg, GLX.GLX_SAMPLES,        tmp, 0));
@@ -329,6 +334,20 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         res.setTransparentBlueValue(xrmask.getBlueMask());
         res.setTransparentAlphaValue(alphaMask);
     }
+    // ALPHA shall be set at last - due to it's auto setting by the above (!opaque / samples)    
+    res.setDoubleBuffered(glXGetFBConfig(display, fbcfg, GLX.GLX_DOUBLEBUFFER,     tmp, 0) != 0);
+    res.setStereo        (glXGetFBConfig(display, fbcfg, GLX.GLX_STEREO,           tmp, 0) != 0);
+    res.setHardwareAccelerated(glXGetFBConfig(display, fbcfg, GLX.GLX_CONFIG_CAVEAT, tmp, 0) != GLX.GLX_SLOW_CONFIG);
+    res.setRedBits       (glXGetFBConfig(display, fbcfg, GLX.GLX_RED_SIZE,         tmp, 0));
+    res.setGreenBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_GREEN_SIZE,       tmp, 0));
+    res.setBlueBits      (glXGetFBConfig(display, fbcfg, GLX.GLX_BLUE_SIZE,        tmp, 0));
+    res.setAlphaBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_ALPHA_SIZE,       tmp, 0));
+    res.setAccumRedBits  (glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_RED_SIZE,   tmp, 0));
+    res.setAccumGreenBits(glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_GREEN_SIZE, tmp, 0));
+    res.setAccumBlueBits (glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_BLUE_SIZE,  tmp, 0));
+    res.setAccumAlphaBits(glXGetFBConfig(display, fbcfg, GLX.GLX_ACCUM_ALPHA_SIZE, tmp, 0));
+    res.setDepthBits     (glXGetFBConfig(display, fbcfg, GLX.GLX_DEPTH_SIZE,       tmp, 0));
+    res.setStencilBits   (glXGetFBConfig(display, fbcfg, GLX.GLX_STENCIL_SIZE,     tmp, 0));
     
     try { 
         res.setPbufferFloatingPointBuffers(glXGetFBConfig(display, fbcfg, GLXExt.GLX_FLOAT_COMPONENTS_NV, tmp, 0) != GL.GL_FALSE);
@@ -422,18 +441,7 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     // Note: use of hardware acceleration is determined by
     // glXCreateContext, not by the XVisualInfo. Optimistically claim
     // that all GLCapabilities have the capability to be hardware
-    // accelerated.
-    res.setHardwareAccelerated(true);
-    res.setDepthBits     (glXGetConfig(display, info, GLX.GLX_DEPTH_SIZE,       tmp, 0));
-    res.setStencilBits   (glXGetConfig(display, info, GLX.GLX_STENCIL_SIZE,     tmp, 0));
-    res.setRedBits       (glXGetConfig(display, info, GLX.GLX_RED_SIZE,         tmp, 0));
-    res.setGreenBits     (glXGetConfig(display, info, GLX.GLX_GREEN_SIZE,       tmp, 0));
-    res.setBlueBits      (glXGetConfig(display, info, GLX.GLX_BLUE_SIZE,        tmp, 0));
-    res.setAlphaBits     (glXGetConfig(display, info, GLX.GLX_ALPHA_SIZE,       tmp, 0));
-    res.setAccumRedBits  (glXGetConfig(display, info, GLX.GLX_ACCUM_RED_SIZE,   tmp, 0));
-    res.setAccumGreenBits(glXGetConfig(display, info, GLX.GLX_ACCUM_GREEN_SIZE, tmp, 0));
-    res.setAccumBlueBits (glXGetConfig(display, info, GLX.GLX_ACCUM_BLUE_SIZE,  tmp, 0));
-    res.setAccumAlphaBits(glXGetConfig(display, info, GLX.GLX_ACCUM_ALPHA_SIZE, tmp, 0));
+    // accelerated.    
     if (isMultisampleEnabled) {
       res.setSampleBuffers(glXGetConfig(display, info, GLX.GLX_SAMPLE_BUFFERS, tmp, 0) != 0);
       res.setNumSamples   (glXGetConfig(display, info, GLX.GLX_SAMPLES,        tmp, 0));
@@ -449,6 +457,18 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         res.setTransparentBlueValue(xrmask.getBlueMask());
         res.setTransparentAlphaValue(alphaMask);
     }
+    // ALPHA shall be set at last - due to it's auto setting by the above (!opaque / samples)
+    res.setHardwareAccelerated(true);
+    res.setDepthBits     (glXGetConfig(display, info, GLX.GLX_DEPTH_SIZE,       tmp, 0));
+    res.setStencilBits   (glXGetConfig(display, info, GLX.GLX_STENCIL_SIZE,     tmp, 0));
+    res.setRedBits       (glXGetConfig(display, info, GLX.GLX_RED_SIZE,         tmp, 0));
+    res.setGreenBits     (glXGetConfig(display, info, GLX.GLX_GREEN_SIZE,       tmp, 0));
+    res.setBlueBits      (glXGetConfig(display, info, GLX.GLX_BLUE_SIZE,        tmp, 0));
+    res.setAlphaBits     (glXGetConfig(display, info, GLX.GLX_ALPHA_SIZE,       tmp, 0));
+    res.setAccumRedBits  (glXGetConfig(display, info, GLX.GLX_ACCUM_RED_SIZE,   tmp, 0));
+    res.setAccumGreenBits(glXGetConfig(display, info, GLX.GLX_ACCUM_GREEN_SIZE, tmp, 0));
+    res.setAccumBlueBits (glXGetConfig(display, info, GLX.GLX_ACCUM_BLUE_SIZE,  tmp, 0));
+    res.setAccumAlphaBits(glXGetConfig(display, info, GLX.GLX_ACCUM_ALPHA_SIZE, tmp, 0));
 
     return GLGraphicsConfigurationUtil.addGLCapabilitiesPermutations(capsBucket, res, drawableTypeBits);
   }
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java
index 8377d2453..234b06bdb 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11GLXGraphicsConfigurationFactory.java
@@ -40,10 +40,12 @@ import javax.media.nativewindow.CapabilitiesChooser;
 import javax.media.nativewindow.CapabilitiesImmutable;
 import javax.media.nativewindow.GraphicsConfigurationFactory;
 import javax.media.nativewindow.VisualIDHolder;
+import javax.media.nativewindow.VisualIDHolder.VIDType;
 import javax.media.opengl.DefaultGLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilities;
 import javax.media.opengl.GLCapabilitiesChooser;
 import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
@@ -73,20 +75,24 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
     static GraphicsConfigurationFactory fallbackX11GraphicsConfigurationFactory = null;
     static void registerFactory() {
         final GraphicsConfigurationFactory newFactory = new X11GLXGraphicsConfigurationFactory();
-        final GraphicsConfigurationFactory oldFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, newFactory);
+        final GraphicsConfigurationFactory oldFactory = GraphicsConfigurationFactory.registerFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, GLCapabilitiesImmutable.class, newFactory);
         if(oldFactory == newFactory) {
             throw new InternalError("GraphicsConfigurationFactory lifecycle impl. error");
         }
-        if(null == oldFactory) {
-            throw new InternalError("Missing fallback GraphicsConfigurationFactory");
+        if(null != oldFactory) {
+            fallbackX11GraphicsConfigurationFactory = oldFactory;
+        } else {
+            fallbackX11GraphicsConfigurationFactory = GraphicsConfigurationFactory.getFactory(com.jogamp.nativewindow.x11.X11GraphicsDevice.class, CapabilitiesImmutable.class);
+            if( null == fallbackX11GraphicsConfigurationFactory ) {
+                throw new InternalError("Missing fallback GraphicsConfigurationFactory");
+            }
         }
-        fallbackX11GraphicsConfigurationFactory = oldFactory;
     }
     private X11GLXGraphicsConfigurationFactory() {
     }
 
     protected AbstractGraphicsConfiguration chooseGraphicsConfigurationImpl(
-            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen) {
+            CapabilitiesImmutable capsChosen, CapabilitiesImmutable capsRequested, CapabilitiesChooser chooser, AbstractGraphicsScreen absScreen, int nativeVisualID) {
         if (!(absScreen instanceof X11GraphicsScreen)) {
             throw new IllegalArgumentException("Only X11GraphicsScreen are allowed here");
         }
@@ -108,12 +114,12 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
                 if(DEBUG) {
                     System.err.println("No GLX available, fallback to "+fallbackX11GraphicsConfigurationFactory.getClass().getSimpleName()+" for: "+absScreen);
                 }
-                return fallbackX11GraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen);
+                return fallbackX11GraphicsConfigurationFactory.chooseGraphicsConfiguration(capsChosen, capsRequested, chooser, absScreen, VisualIDHolder.VID_UNDEFINED);
             }
             throw new InternalError("No GLX and no fallback GraphicsConfigurationFactory available for: "+absScreen);
         }        
         return chooseGraphicsConfigurationStatic((GLCapabilitiesImmutable)capsChosen, (GLCapabilitiesImmutable)capsRequested,
-                                                 (GLCapabilitiesChooser)chooser, (X11GraphicsScreen)absScreen);
+                                                 (GLCapabilitiesChooser)chooser, (X11GraphicsScreen)absScreen, nativeVisualID);
     }
 
     protected static List<GLCapabilitiesImmutable> getAvailableCapabilities(X11GLXDrawableFactory factory, AbstractGraphicsDevice device) {
@@ -161,7 +167,7 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
             return null;
         }
         for (int i = 0; i < fbcfgsL.limit(); i++) {
-            if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, display, fbcfgsL.get(i), GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
+            if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, absDevice, fbcfgsL.get(i), GLGraphicsConfigurationUtil.ALL_BITS, isMultisampleAvailable) ) {
                 if(DEBUG) {
                     System.err.println("X11GLXGraphicsConfiguration.getAvailableGLCapabilitiesFBConfig: FBConfig invalid (2): ("+x11Screen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
                 }
@@ -198,7 +204,7 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
     static X11GLXGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilitiesImmutable capsChosen,
                                                                          GLCapabilitiesImmutable capsReq,
                                                                          GLCapabilitiesChooser chooser,
-                                                                         X11GraphicsScreen x11Screen) {
+                                                                         X11GraphicsScreen x11Screen, int xvisualID) {
         if (x11Screen == null) {
             throw new IllegalArgumentException("AbstractGraphicsScreen is null");
         }
@@ -209,24 +215,24 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         X11GraphicsDevice x11Device = (X11GraphicsDevice) x11Screen.getDevice();        
         X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
 
-        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, factory.canCreateGLPbuffer(x11Device) );
+        capsChosen = GLGraphicsConfigurationUtil.fixGLCapabilities( capsChosen, GLContext.isFBOAvailable(x11Device, capsChosen.getGLProfile()), factory.canCreateGLPbuffer(x11Device) );
         boolean usePBuffer = capsChosen.isPBuffer();
     
         X11GLXGraphicsConfiguration res = null;
         if( factory.isGLXVersionGreaterEqualOneThree(x11Device) ) {
-            res = chooseGraphicsConfigurationFBConfig(capsChosen, capsReq, chooser, x11Screen);
+            res = chooseGraphicsConfigurationFBConfig(capsChosen, capsReq, chooser, x11Screen, xvisualID);
         }
         if(null==res) {
             if(usePBuffer) {
-                throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig for "+capsChosen);
+                throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig for visualID "+toHexString(xvisualID)+", "+capsChosen);
             }
-            res = chooseGraphicsConfigurationXVisual(capsChosen, capsReq, chooser, x11Screen);
+            res = chooseGraphicsConfigurationXVisual(capsChosen, capsReq, chooser, x11Screen, xvisualID);
         }
         if(null==res) {
-            throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig and XVisual for "+capsChosen);
+            throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig and XVisual for visualID "+toHexString(xvisualID)+", "+x11Screen+", "+capsChosen);
         }
         if(DEBUG) {
-            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationStatic("+x11Screen+","+capsChosen+"): "+res);
+            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationStatic(visualID "+toHexString(xvisualID)+", "+x11Screen+","+capsChosen+"): "+res);
         }
         return res;
     }
@@ -245,19 +251,20 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         }
         final X11GLXDrawableFactory factory = (X11GLXDrawableFactory) GLDrawableFactory.getDesktopFactory();
                
-        final X11GLCapabilities caps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glp, display, fbcfg, true, true, true, factory.isGLXMultisampleAvailable(absDevice));
+        final X11GLCapabilities caps = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glp, absDevice, fbcfg, true, true, true, factory.isGLXMultisampleAvailable(absDevice));
         return new X11GLXGraphicsConfiguration(x11Screen, caps, caps, new DefaultGLCapabilitiesChooser());
     }
 
     private static X11GLXGraphicsConfiguration chooseGraphicsConfigurationFBConfig(GLCapabilitiesImmutable capsChosen,
                                                                                    GLCapabilitiesImmutable capsReq,
                                                                                    GLCapabilitiesChooser chooser,
-                                                                                   X11GraphicsScreen x11Screen) {
+                                                                                   X11GraphicsScreen x11Screen, int xvisualID) {
         int recommendedIndex = -1;
         PointerBuffer fbcfgsL = null;
         GLProfile glProfile = capsChosen.getGLProfile();
         boolean onscreen = capsChosen.isOnscreen();
         boolean usePBuffer = capsChosen.isPBuffer();
+        boolean useFBO = capsChosen.isFBO();
 
         // Utilizing FBConfig
         //
@@ -270,13 +277,15 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capsChosen, true, isMultisampleAvailable, display, screen);
         int[] count = { -1 };
         List<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer);
-
-        // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice
-        fbcfgsL = GLX.glXChooseFBConfig(display, screen, attribs, 0, count, 0);
+        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(onscreen, usePBuffer, useFBO);
+        // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice,
+        // skipped if xvisualID is given
+        if( VisualIDHolder.VID_UNDEFINED == xvisualID ) {
+            fbcfgsL = GLX.glXChooseFBConfig(display, screen, attribs, 0, count, 0);
+        }
         if (fbcfgsL != null && fbcfgsL.limit()>0) {
             for (int i = 0; i < fbcfgsL.limit(); i++) {
-                if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, display, fbcfgsL.get(i), winattrmask, isMultisampleAvailable) ) {
+                if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, absDevice, fbcfgsL.get(i), winattrmask, isMultisampleAvailable) ) {
                     if(DEBUG) {
                         System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: FBConfig invalid (1): ("+x11Screen+","+capsChosen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
                     }
@@ -309,13 +318,40 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
             }
 
             for (int i = 0; i < fbcfgsL.limit(); i++) {
-                if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, display, fbcfgsL.get(i), winattrmask, isMultisampleAvailable) ) {
+                if( !X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(availableCaps, glProfile, absDevice, fbcfgsL.get(i), winattrmask, isMultisampleAvailable) ) {
                     if(DEBUG) {
                         System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: FBConfig invalid (2): ("+x11Screen+"): fbcfg: "+toHexString(fbcfgsL.get(i)));
                     }
                 }
             }
         }
+        
+        if(DEBUG) {
+            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: got configs: "+availableCaps.size());
+            for(int i=0; i<availableCaps.size(); i++) {
+                System.err.println(i+": "+availableCaps.get(i));
+            }
+        }
+        
+        if( VisualIDHolder.VID_UNDEFINED != xvisualID ) {
+            for(int i=0; i<availableCaps.size(); ) {
+                VisualIDHolder vidh = (VisualIDHolder) availableCaps.get(i);
+                if(vidh.getVisualID(VIDType.X11_XVISUAL) != xvisualID ) {
+                    availableCaps.remove(i);
+                } else {
+                    i++;
+                }
+            }
+            if(0==availableCaps.size()) {
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: post filter visualID "+toHexString(xvisualID )+" no config found, failed - return null");
+                }
+                return null;
+            } else if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: post filter visualID "+toHexString(xvisualID)+" got configs: "+availableCaps.size());
+            }
+        }
+        
         int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
         if ( 0 > chosenIndex ) {
             if (DEBUG) {
@@ -332,13 +368,13 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
     private static X11GLXGraphicsConfiguration chooseGraphicsConfigurationXVisual(GLCapabilitiesImmutable capsChosen,
                                                                                   GLCapabilitiesImmutable capsReq,
                                                                                   GLCapabilitiesChooser chooser,
-                                                                                  X11GraphicsScreen x11Screen) {
+                                                                                  X11GraphicsScreen x11Screen, int xvisualID) {
         if (chooser == null) {
             chooser = new DefaultGLCapabilitiesChooser();
         }
 
         GLProfile glProfile = capsChosen.getGLProfile();
-        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(capsChosen.isOnscreen(), false /* pbuffer */);
+        final int winattrmask = GLGraphicsConfigurationUtil.getWinAttributeBits(capsChosen.isOnscreen(), false /* pbuffer */, false);
         List<GLCapabilitiesImmutable> availableCaps = new ArrayList<GLCapabilitiesImmutable>();
         int recommendedIndex = -1;
 
@@ -350,14 +386,18 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
         final boolean isMultisampleAvailable = factory.isGLXMultisampleAvailable(absDevice);        
         int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capsChosen, false, isMultisampleAvailable, display, screen);
 
+        XVisualInfo recommendedVis = null;
         // 1st choice: get GLCapabilities based on users GLCapabilities setting recommendedIndex as preferred choice
-        XVisualInfo recommendedVis = GLX.glXChooseVisual(display, screen, attribs, 0);
-        if (DEBUG) {
-            System.err.print("glXChooseVisual recommended ");
-            if (recommendedVis == null) {
-                System.err.println("null visual");
-            } else {
-                System.err.println("visual id " + toHexString(recommendedVis.getVisualid()));
+        // skipped if xvisualID is given
+        if( VisualIDHolder.VID_UNDEFINED == xvisualID ) {  
+            recommendedVis = GLX.glXChooseVisual(display, screen, attribs, 0);
+            if (DEBUG) {
+                System.err.print("glXChooseVisual recommended ");
+                if (recommendedVis == null) {
+                    System.err.println("null visual");
+                } else {
+                    System.err.println("visual id " + toHexString(recommendedVis.getVisualid()));
+                }
             }
         }
 
@@ -383,6 +423,32 @@ public class X11GLXGraphicsConfigurationFactory extends GLGraphicsConfigurationF
             }
         }
 
+        if(DEBUG) {
+            System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: got configs: "+availableCaps.size());
+            for(int i=0; i<availableCaps.size(); i++) {
+                System.err.println(i+": "+availableCaps.get(i));
+            }
+        }
+        
+        if( VisualIDHolder.VID_UNDEFINED != xvisualID ) {
+            for(int i=0; i<availableCaps.size(); ) {
+                VisualIDHolder vidh = (VisualIDHolder) availableCaps.get(i);
+                if(vidh.getVisualID(VIDType.X11_XVISUAL) != xvisualID ) {
+                    availableCaps.remove(i);
+                } else {
+                    i++;
+                }
+            }
+            if(0==availableCaps.size()) {
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: post filter visualID "+toHexString(xvisualID )+" no config found, failed - return null");                    
+                }
+                return null;
+            } else if(DEBUG) {
+                System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationXVisual: post filter visualID "+toHexString(xvisualID)+" got configs: "+availableCaps.size());
+            }
+        }
+        
         int chosenIndex = chooseCapabilities(chooser, capsChosen, availableCaps, recommendedIndex);
         if ( 0 > chosenIndex ) {
             if (DEBUG) {
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java
index 9e22afa6d..363299321 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11OnscreenGLXDrawable.java
@@ -51,10 +51,13 @@ public class X11OnscreenGLXDrawable extends X11GLXDrawable {
   long glXWindow; // GLXWindow, a GLXDrawable representation
   boolean useGLXWindow;
 
-  protected X11OnscreenGLXDrawable(GLDrawableFactory factory, NativeSurface component) {
-    super(factory, component, false);
+  protected X11OnscreenGLXDrawable(GLDrawableFactory factory, NativeSurface component, boolean realized) {
+    super(factory, component, realized);
     glXWindow=0;
     useGLXWindow=false;
+    if(realized) {
+        updateHandle();
+    }
   }
 
   @Override
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java
index cdf81ebd3..e1fe2f27e 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11PbufferGLXDrawable.java
@@ -43,7 +43,7 @@ package jogamp.opengl.x11.glx;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
@@ -77,7 +77,7 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
     if (ns.getSurfaceHandle() != 0) {
       GLX.glXDestroyPbuffer(ns.getDisplayHandle(), ns.getSurfaceHandle());
     }
-    ((SurfaceChangeable)ns).setSurfaceHandle(0);
+    ((MutableSurface)ns).setSurfaceHandle(0);
   }
 
   private void createPbuffer() {
@@ -108,12 +108,14 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
 
       // Create the p-buffer.
       int niattribs = 0;
-      int[] iattributes = new int[5];
+      int[] iattributes = new int[7];
 
       iattributes[niattribs++] = GLX.GLX_PBUFFER_WIDTH;
       iattributes[niattribs++] = ns.getWidth();
       iattributes[niattribs++] = GLX.GLX_PBUFFER_HEIGHT;
       iattributes[niattribs++] = ns.getHeight();
+      iattributes[niattribs++] = GLX.GLX_LARGEST_PBUFFER; // exact
+      iattributes[niattribs++] = 0;
       iattributes[niattribs++] = 0;
 
       long pbuffer = GLX.glXCreatePbuffer(display, config.getFBConfig(), iattributes, 0);
@@ -123,15 +125,7 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
       }
 
       // Set up instance variables
-      ((SurfaceChangeable)ns).setSurfaceHandle(pbuffer);
-
-      // Determine the actual width and height we were able to create.
-      int[] tmp = new int[1];
-      GLX.glXQueryDrawable(display, pbuffer, GLX.GLX_WIDTH, tmp, 0);
-      int width = tmp[0];
-      GLX.glXQueryDrawable(display, pbuffer, GLX.GLX_HEIGHT, tmp, 0);
-      int height = tmp[0];
-      ((SurfaceChangeable)ns).surfaceSizeChanged(width, height);
+      ((MutableSurface)ns).setSurfaceHandle(pbuffer);
 
       if (DEBUG) {
         System.err.println("Created pbuffer " + this);
diff --git a/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java b/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java
index 1e7b89828..04627724c 100644
--- a/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/x11/glx/X11PixmapGLXDrawable.java
@@ -43,7 +43,7 @@ package jogamp.opengl.x11.glx;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.nativewindow.MutableSurface;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
@@ -93,7 +93,7 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
         pixmap = 0;
         throw new GLException("glXCreateGLXPixmap failed");
     }
-    ((SurfaceChangeable)ns).setSurfaceHandle(drawable);
+    ((MutableSurface)ns).setSurfaceHandle(drawable);
     if (DEBUG) {
         System.err.println("Created pixmap " + toHexString(pixmap) +
                            ", GLXPixmap " + toHexString(drawable) +
@@ -133,7 +133,7 @@ public class X11PixmapGLXDrawable extends X11GLXDrawable {
     X11Lib.XFreePixmap(display, pixmap);
     drawable = 0;
     pixmap = 0;
-    ((SurfaceChangeable)ns).setSurfaceHandle(0);
+    ((MutableSurface)ns).setSurfaceHandle(0);
     display = 0;
   }
 }