Add: Extended support for CVM crosscompile:

    - Clean up X11 dependency
    - NativeWindow:
        - Seperate X11 out of core.
        - Add nativewindow.x11.jar and nativewindow.x11.cdc.jar
    - Newt:
        - Seperate X11,win,osx out of core.
        - Add newt.x11.jar, newt.win.jar, newt.osx.jar and the CDC variants

Fix: External Context & Drawable (X11 and Windows)
    - Properly fetch current context values (ctx, display, drawable, ..)
    - Create GraphicsConfiguration based on the given pixelformat/FBConfig

Fix: Java2D OpenGL Usage
    - Using the external context as shared for the external drawable
    - JAWTUtil: Skip locking in case of OGL-Flush-Queue
    - TODO: Windows FBO still does not work .. (X11 is fine)

33 files changed, 852 insertions, 702 deletions

diff --git a/src/jogl/classes/com/sun/opengl/impl/awt/AWTUtil.java b/src/jogl/classes/com/sun/opengl/impl/awt/AWTUtil.java
index 11575ab65..f4c8944df 100644
--- a/src/jogl/classes/com/sun/opengl/impl/awt/AWTUtil.java
+++ b/src/jogl/classes/com/sun/opengl/impl/awt/AWTUtil.java
@@ -56,12 +56,14 @@ public class AWTUtil {
   static {
     lockedToolkit = false;
     headlessMode = GraphicsEnvironment.isHeadless();
-    try {
-        j2dClazz = Class.forName("com.sun.opengl.impl.awt.Java2D");
-        isOGLPipelineActive = j2dClazz.getMethod("isOGLPipelineActive", null);
-        isQueueFlusherThread = j2dClazz.getMethod("isQueueFlusherThread", null);
-        j2dOk = true;
-    } catch (Exception e) {}
+    if(!headlessMode) {
+        try {
+            j2dClazz = Class.forName("com.sun.opengl.impl.awt.Java2D");
+            isOGLPipelineActive = j2dClazz.getMethod("isOGLPipelineActive", null);
+            isQueueFlusherThread = j2dClazz.getMethod("isQueueFlusherThread", null);
+            j2dOk = true;
+        } catch (Exception e) {}
+    }
   }
 
   private static boolean lockedToolkit;
@@ -117,7 +119,7 @@ public class AWTUtil {
   }
 
   public static boolean isToolkitLocked() {
-    return lockedToolkit;
+    return JAWTUtil.isToolkitLocked();
   }
 
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/awt/Java2D.java b/src/jogl/classes/com/sun/opengl/impl/awt/Java2D.java
index 328771a3b..098ec8529 100755
--- a/src/jogl/classes/com/sun/opengl/impl/awt/Java2D.java
+++ b/src/jogl/classes/com/sun/opengl/impl/awt/Java2D.java
@@ -558,8 +558,7 @@ public class Java2D {
       }
       invokeWithOGLSharedContextCurrent(device.getDefaultConfiguration(), new Runnable() {
           public void run() {
-            // AbstractGraphicsScreen awtscreen = AWTGraphicsScreen.createScreenDevice(device);
-            j2dFBOShareContext = GLDrawableFactory.getFactory(GLProfile.getDefault()).createExternalGLContext(/*awtscreen*/);
+            j2dFBOShareContext = GLDrawableFactory.getFactory(GLProfile.getDefault()).createExternalGLContext();
           }
         });
       if (DEBUG) {
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsDummyWGLDrawable.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsDummyWGLDrawable.java
index 62388173c..f1e9483cd 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsDummyWGLDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsDummyWGLDrawable.java
@@ -47,7 +47,7 @@ public class WindowsDummyWGLDrawable extends WindowsWGLDrawable {
   private long hwnd, hdc;
 
   public WindowsDummyWGLDrawable(GLDrawableFactory factory) {
-    super(factory, new NullWindow(WindowsWGLGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(null, false)), true);
+    super(factory, new NullWindow(WindowsWGLGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(null, true, true)), true);
     // All entries to CreateDummyWindow must synchronize on one object
     // to avoid accidentally registering the dummy window class twice
     synchronized (WindowsDummyWGLDrawable.class) {
@@ -59,7 +59,7 @@ public class WindowsDummyWGLDrawable extends WindowsWGLDrawable {
     // Choose a (hopefully hardware-accelerated) OpenGL pixel format for this device context
     GLCapabilities caps = new GLCapabilities(null);
     caps.setDepthBits(16);
-    PIXELFORMATDESCRIPTOR pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps, true);
+    PIXELFORMATDESCRIPTOR pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps);
     int pixelFormat = WGL.ChoosePixelFormat(hdc, pfd);
     if ((pixelFormat == 0) ||
         (!WGL.SetPixelFormat(hdc, pixelFormat, pfd))) {
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLContext.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLContext.java
index b42a54104..b9fc80156 100755
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLContext.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLContext.java
@@ -44,19 +44,16 @@ import java.util.*;
 import javax.media.opengl.*;
 import javax.media.nativewindow.*;
 import com.sun.opengl.impl.*;
+import com.sun.nativewindow.impl.NullWindow;
 
 public class WindowsExternalWGLContext extends WindowsWGLContext {
   private boolean firstMakeCurrent = true;
   private boolean created = true;
   private GLContext lastContext;
 
-  public WindowsExternalWGLContext(AbstractGraphicsScreen absScreen) {
-    // FIXME: figure out how to hook back in the Java 2D / JOGL bridge
-    super(null, null);
-    hglrc = WGL.wglGetCurrentContext();
-    if (hglrc == 0) {
-      throw new GLException("Error: attempted to make an external GLContext without a drawable/context current");
-    }
+  private WindowsExternalWGLContext(Drawable drawable, long hglrc) {
+    super(drawable, null);
+    this.hglrc = hglrc;
     if (DEBUG) {
       System.err.println(getThreadName() + ": !!! Created external OpenGL context " + toHexString(hglrc) + " for " + this);
     }
@@ -64,6 +61,29 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
     setGLFunctionAvailability(false);
   }
 
+  protected static WindowsExternalWGLContext create(GLDrawableFactory factory, GLProfile glp) {
+    long hdc = WGL.wglGetCurrentDC();
+    if (0==hdc) {
+      throw new GLException("Error: attempted to make an external GLDrawable without a drawable current");
+    }
+    long hglrc = WGL.wglGetCurrentContext();
+    if (hglrc == 0) {
+      throw new GLException("Error: attempted to make an external GLContext without a context current");
+    }
+    int pfdID = WGL.GetPixelFormat(hdc);
+    if (pfdID == 0) {
+      throw new GLException("Error: attempted to make an external GLContext without a valid pixelformat");
+    }
+
+    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
+    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.create(glp, aScreen, hdc, pfdID, true, true);
+
+    NullWindow nw = new NullWindow(cfg);
+    nw.setSurfaceHandle(hdc);
+
+    return new WindowsExternalWGLContext(new Drawable(factory, nw), hglrc);
+  }
+
   public int makeCurrent() throws GLException {
     // Save last context if necessary to allow external GLContexts to
     // talk to other GLContexts created by this library
@@ -100,4 +120,27 @@ public class WindowsExternalWGLContext extends WindowsWGLContext {
   public boolean isCreated() {
     return created;
   }
+
+  // Need to provide the display connection to extension querying APIs
+  static class Drawable extends WindowsWGLDrawable {
+    Drawable(GLDrawableFactory factory, NativeWindow comp) {
+      super(factory, comp, true);
+    }
+
+    public GLContext createContext(GLContext shareWith) {
+      throw new GLException("Should not call this");
+    }
+
+    public int getWidth() {
+      throw new GLException("Should not call this");
+    }
+
+    public int getHeight() {
+      throw new GLException("Should not call this");
+    }
+
+    public void setSize(int width, int height) {
+      throw new GLException("Should not call this");
+    }
+  }
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java
index 164216c2d..706675893 100755
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsExternalWGLDrawable.java
@@ -46,20 +46,32 @@ import com.sun.nativewindow.impl.NullWindow;
 
 public class WindowsExternalWGLDrawable extends WindowsWGLDrawable {
 
-  public WindowsExternalWGLDrawable(GLDrawableFactory factory, NativeWindow component) {
+  private WindowsExternalWGLDrawable(GLDrawableFactory factory, NativeWindow component) {
     super(factory, component, true);
   }
 
-  public static WindowsExternalWGLDrawable create(GLDrawableFactory factory, AbstractGraphicsScreen absScreen) {
+  protected static WindowsExternalWGLDrawable create(GLDrawableFactory factory, GLProfile glp) {
     long hdc = WGL.wglGetCurrentDC();
-    NullWindow nw = new NullWindow(WindowsWGLGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(absScreen, false));
-    nw.setSurfaceHandle(hdc);
-    if (nw.getSurfaceHandle() == 0) {
-      throw new GLException("Error: attempted to make an external GLDrawable without a drawable/context current");
+    if (0==hdc) {
+      throw new GLException("Error: attempted to make an external GLDrawable without a drawable current");
+    }
+    int pfdID = WGL.GetPixelFormat(hdc);
+    if (pfdID == 0) {
+      throw new GLException("Error: attempted to make an external GLContext without a valid pixelformat");
     }
+
+    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
+    WindowsWGLGraphicsConfiguration cfg = WindowsWGLGraphicsConfiguration.create(glp, aScreen, hdc, pfdID, true, true);
+
+    NullWindow nw = new NullWindow(cfg);
+    nw.setSurfaceHandle(hdc);
+
+    // cfg.updateGraphicsConfiguration(factory, nw);
+
     return new WindowsExternalWGLDrawable(factory, nw);
   }
 
+
   public GLContext createContext(GLContext shareWith) {
     return new WindowsWGLContext(this, shareWith);
   }
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOffscreenWGLDrawable.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOffscreenWGLDrawable.java
index dc9d66073..ecd4e1685 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOffscreenWGLDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOffscreenWGLDrawable.java
@@ -54,7 +54,7 @@ public class WindowsOffscreenWGLDrawable extends WindowsWGLDrawable {
                                      GLCapabilitiesChooser chooser,
                                      int width,
                                      int height) {
-    super(factory, new NullWindow(WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(requestedCapabilities, chooser, absScreen, true)), true);
+    super(factory, new NullWindow(WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(requestedCapabilities, chooser, absScreen, false, false)), true);
     ((NullWindow) getNativeWindow()).setSize(width, height);
     create();
   }
@@ -111,7 +111,7 @@ public class WindowsOffscreenWGLDrawable extends WindowsWGLDrawable {
       throw new GLException("Error selecting bitmap into new device context");
     }
         
-    config.updateGraphicsConfiguration(getFactory(), nw, true);
+    config.updateGraphicsConfiguration(getFactory(), nw);
   }
   
   public void destroy() {
@@ -126,4 +126,8 @@ public class WindowsOffscreenWGLDrawable extends WindowsWGLDrawable {
       nw.setSurfaceHandle(0);
     }
   }
+
+  public void swapBuffers() throws GLException {
+  }
+
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOnscreenWGLDrawable.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOnscreenWGLDrawable.java
index 31925589b..395ccf7d2 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOnscreenWGLDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsOnscreenWGLDrawable.java
@@ -44,15 +44,6 @@ import javax.media.opengl.*;
 import com.sun.opengl.impl.*;
 
 public class WindowsOnscreenWGLDrawable extends WindowsWGLDrawable {
-  private static final boolean PROFILING = Debug.debug("WindowsOnscreenWGLDrawable.profiling");
-  private static final int PROFILING_TICKS = 200;
-  private int  profilingLockSurfaceTicks;
-  private long profilingLockSurfaceTime;
-  private int  profilingUnlockSurfaceTicks;
-  private long profilingUnlockSurfaceTime;
-  private int  profilingSwapBuffersTicks;
-  private long profilingSwapBuffersTime;
-
   protected WindowsOnscreenWGLDrawable(GLDrawableFactory factory, NativeWindow component) {
     super(factory, component, false);
   }
@@ -69,43 +60,4 @@ public class WindowsOnscreenWGLDrawable extends WindowsWGLDrawable {
     return component.getHeight();
   }
 
-  public void swapBuffers() throws GLException {
-    boolean didLock = false;
-
-    try {
-        if ( !isSurfaceLocked() ) {
-            // Usually the surface shall be locked within [makeCurrent .. swap .. release]
-            if (lockSurface() == NativeWindow.LOCK_SURFACE_NOT_READY) {
-                return;
-            }
-            didLock = true;
-        }
-
-        long startTime = 0;
-        if (PROFILING) {
-          startTime = System.currentTimeMillis();
-        }
-
-        if (!WGL.SwapBuffers(getNativeWindow().getSurfaceHandle()) && (WGL.GetLastError() != 0)) {
-          throw new GLException("Error swapping buffers");
-        }
-
-        if (PROFILING) {
-          long endTime = System.currentTimeMillis();
-          profilingSwapBuffersTime += (endTime - startTime);
-          int ticks = PROFILING_TICKS;
-          if (++profilingSwapBuffersTicks == ticks) {
-            System.err.println("SwapBuffers calls: " + profilingSwapBuffersTime + " ms / " + ticks + "  calls (" +
-                               ((float) profilingSwapBuffersTime / (float) ticks) + " ms/call)");
-            profilingSwapBuffersTime = 0;
-            profilingSwapBuffersTicks = 0;
-          }
-        }
-    } finally {
-        if (didLock) {
-          unlockSurface();
-        }
-    }
-  }
-
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsPbufferWGLDrawable.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsPbufferWGLDrawable.java
index 2d996ca40..6a03406f9 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsPbufferWGLDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsPbufferWGLDrawable.java
@@ -61,7 +61,7 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
                                    WindowsWGLDrawable dummyDrawable,
                                    WGLExt wglExt) {
     super(factory, new NullWindow(WindowsWGLGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(
-                                        requestedCapabilities, chooser, absScreen, true) ), true);
+                                        requestedCapabilities, chooser, absScreen, false, true) ), true);
     if (width <= 0 || height <= 0) {
       throw new GLException("Width and height of pbuffer must be positive (were (" +
 			    width + ", " + height + "))");
@@ -108,20 +108,6 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
   }
 
   public void swapBuffers() throws GLException {
-    // FIXME: this doesn't make sense any more because we don't have
-    // access to our OpenGL context here
-    /*
-    // FIXME: do we need to do anything if the pbuffer is double-buffered?
-    // For now, just grab the pixels for the render-to-texture support.
-    if (rtt && !hasRTT) {
-      if (DEBUG) {
-        System.err.println("Copying pbuffer data to GL_TEXTURE_2D state");
-      }
-
-      GL gl = getGL();
-      gl.glCopyTexSubImage2D(textureTarget, 0, 0, 0, 0, 0, width, height);
-    }
-    */
   }
 
   private void createPbuffer(long parentHdc, WGLExt wglExt) {
@@ -301,18 +287,24 @@ public class WindowsPbufferWGLDrawable extends WindowsWGLDrawable {
       iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_PBUFFER_ARB;
       int[] ivalues = new int[niattribs];
       if (wglExt.wglGetPixelFormatAttribivARB(parentHdc, pformats[whichFormat], 0, niattribs, iattributes, 0, ivalues, 0)) {
-        GLCapabilities newCaps = WindowsWGLGraphicsConfiguration.AttribList2GLCapabilities(glProfile, iattributes, niattribs, ivalues, false);
+        GLCapabilities newCaps = WindowsWGLGraphicsConfiguration.AttribList2GLCapabilities(glProfile, iattributes, niattribs, ivalues, true, false, true);
         PIXELFORMATDESCRIPTOR pfd = WindowsWGLGraphicsConfiguration.createPixelFormatDescriptor();
         if (WGL.DescribePixelFormat(parentHdc, pformats[whichFormat], pfd.size(), pfd) == 0) {
           throw new GLException("Unable to describe pixel format " + pformats[whichFormat]);
         }
+        if(newCaps.isOnscreen()) {
+          throw new GLException("Error: Selected Onscreen Caps for PBuffer: "+newCaps);
+        }
         config.setCapsPFD(newCaps, pfd, pformats[whichFormat]);
       } else {
         PIXELFORMATDESCRIPTOR pfd = WindowsWGLGraphicsConfiguration.createPixelFormatDescriptor();
         if (WGL.DescribePixelFormat(parentHdc, pformats[whichFormat], pfd.size(), pfd) == 0) {
           throw new GLException("Unable to describe pixel format " + pformats[whichFormat]);
         }
-        GLCapabilities newCaps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd);
+        GLCapabilities newCaps = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd, false, true);
+        if(newCaps.isOnscreen()) {
+          throw new GLException("Error: Selected Onscreen Caps for PBuffer: "+newCaps);
+        }
         config.setCapsPFD(newCaps, pfd, pformats[whichFormat]);
       }
     }
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawable.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawable.java
index 464cfbcc2..3017d258b 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawable.java
@@ -46,6 +46,15 @@ import com.sun.gluegen.runtime.DynamicLookupHelper;
 
 public abstract class WindowsWGLDrawable extends GLDrawableImpl {
   private static final int MAX_SET_PIXEL_FORMAT_FAIL_COUNT = 5;
+  private static final boolean PROFILING = Debug.debug("WindowsWGLDrawable.profiling");
+  private static final int PROFILING_TICKS = 200;
+  private int  profilingLockSurfaceTicks;
+  private long profilingLockSurfaceTime;
+  private int  profilingUnlockSurfaceTicks;
+  private long profilingUnlockSurfaceTime;
+  private int  profilingSwapBuffersTicks;
+  private long profilingSwapBuffersTime;
+
 
   public WindowsWGLDrawable(GLDrawableFactory factory, NativeWindow comp, boolean realized) {
     super(factory, comp, realized);
@@ -64,7 +73,7 @@ public abstract class WindowsWGLDrawable extends GLDrawableImpl {
     try {
         NativeWindow nativeWindow = getNativeWindow();
         WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration)nativeWindow.getGraphicsConfiguration().getNativeGraphicsConfiguration();
-        config.updateGraphicsConfiguration(getFactory(), nativeWindow, false);
+        config.updateGraphicsConfiguration(getFactory(), nativeWindow);
         if (DEBUG) {
           System.err.println("!!! WindowsWGLDrawable.setRealized(true): "+config);
         }
@@ -73,6 +82,48 @@ public abstract class WindowsWGLDrawable extends GLDrawableImpl {
     }
   }
 
+  public void swapBuffers() throws GLException {
+    GLCapabilities caps = (GLCapabilities)getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration().getChosenCapabilities();
+    if (caps.getDoubleBuffered()) {
+        boolean didLock = false;
+
+        try {
+            if ( !isSurfaceLocked() ) {
+                // Usually the surface shall be locked within [makeCurrent .. swap .. release]
+                if (lockSurface() == NativeWindow.LOCK_SURFACE_NOT_READY) {
+                    return;
+                }
+                didLock = true;
+            }
+
+            long startTime = 0;
+            if (PROFILING) {
+              startTime = System.currentTimeMillis();
+            }
+
+            if (!WGL.SwapBuffers(getNativeWindow().getSurfaceHandle()) && (WGL.GetLastError() != 0)) {
+              throw new GLException("Error swapping buffers");
+            }
+
+            if (PROFILING) {
+              long endTime = System.currentTimeMillis();
+              profilingSwapBuffersTime += (endTime - startTime);
+              int ticks = PROFILING_TICKS;
+              if (++profilingSwapBuffersTicks == ticks) {
+                System.err.println("SwapBuffers calls: " + profilingSwapBuffersTime + " ms / " + ticks + "  calls (" +
+                                   ((float) profilingSwapBuffersTime / (float) ticks) + " ms/call)");
+                profilingSwapBuffersTime = 0;
+                profilingSwapBuffersTicks = 0;
+              }
+            }
+        } finally {
+            if (didLock) {
+              unlockSurface();
+            }
+        }
+    }
+  }
+
   public DynamicLookupHelper getDynamicLookupHelper() {
     return (WindowsWGLDrawableFactory) getFactoryImpl() ;
   }
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java
index 1c5c54b14..4d965e52b 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLDrawableFactory.java
@@ -166,8 +166,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl implements
   }
 
   public GLContext createExternalGLContext() {
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
-    return new WindowsExternalWGLContext(aScreen);
+    return WindowsExternalWGLContext.create(this, null);
   }
 
   public boolean canCreateExternalGLDrawable() {
@@ -175,8 +174,7 @@ public class WindowsWGLDrawableFactory extends GLDrawableFactoryImpl implements
   }
 
   public GLDrawable createExternalGLDrawable() {
-    AbstractGraphicsScreen aScreen = DefaultGraphicsScreen.createDefault();
-    return WindowsExternalWGLDrawable.create(this, aScreen);
+    return WindowsExternalWGLDrawable.create(this, null);
   }
 
   public void loadOpenGL32Library() {
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfiguration.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfiguration.java
index 8b721824e..1a8d45465 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfiguration.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfiguration.java
@@ -58,12 +58,27 @@ public class WindowsWGLGraphicsConfiguration extends DefaultGraphicsConfiguratio
         this.pixelfmtID = pixelfmtID;
     }
 
+    public static WindowsWGLGraphicsConfiguration create(GLProfile glp, AbstractGraphicsScreen screen, long hdc, int pfdID, boolean onscreen, boolean usePBuffer) {
+        PIXELFORMATDESCRIPTOR pfd = createPixelFormatDescriptor();
+        if (WGL.DescribePixelFormat(hdc, pfdID, pfd.size(), pfd) == 0) {
+            throw new GLException("Unable to describe pixel format " + pfdID);
+        }
+        if(null==glp) {
+          glp = GLProfile.getDefault();
+        }
+        GLCapabilities caps = PFD2GLCapabilities(glp, pfd, onscreen, usePBuffer);
+        WindowsWGLGraphicsConfiguration cfg = new WindowsWGLGraphicsConfiguration(screen, caps, caps, pfd, pfdID, new DefaultGLCapabilitiesChooser());
+        cfg.setCapsPFD(caps, pfd, pfdID);
+
+        return cfg;
+    }
+
     public Object clone() {
         return super.clone();
     }
 
-    protected void updateGraphicsConfiguration(GLDrawableFactory factory, NativeWindow nativeWindow, boolean useOffScreen) {
-        WindowsWGLGraphicsConfigurationFactory.updateGraphicsConfiguration(chooser, factory, nativeWindow, useOffScreen);
+    protected void updateGraphicsConfiguration(GLDrawableFactory factory, NativeWindow nativeWindow) {
+        WindowsWGLGraphicsConfigurationFactory.updateGraphicsConfiguration(chooser, factory, nativeWindow);
     }
     protected void setCapsPFD(GLCapabilities caps, PIXELFORMATDESCRIPTOR pfd, int pfdID) {
         // FIXME: setScreen ( .. )
@@ -236,20 +251,67 @@ public class WindowsWGLGraphicsConfiguration extends DefaultGraphicsConfiguratio
         return true;
     }
 
+    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 int WGLConfig2DrawableTypeBits(int[] iattribs,
+                                                 int niattribs,
+                                                 int[] iresults) {
+        int val = 0;
+
+        for (int i = 0; i < niattribs; i++) {
+          int attr = iattribs[i];
+          switch (attr) {
+            case WGLExt.WGL_DRAW_TO_WINDOW_ARB:
+                if(iresults[i] == GL.GL_TRUE) val |= WINDOW_BIT;
+                break;
+            case WGLExt.WGL_DRAW_TO_BITMAP_ARB:
+                if(iresults[i] == GL.GL_TRUE) val |= BITMAP_BIT;
+                break;
+            case WGLExt.WGL_DRAW_TO_PBUFFER_ARB:
+                if(iresults[i] == GL.GL_TRUE) val |= PBUFFER_BIT;
+                break;
+            }
+        }
+        return val;
+    }
+
+    public static boolean WGLConfigDrawableTypeVerify(int val, boolean onscreen, boolean usePBuffer) {
+        boolean res;
+
+        if ( onscreen ) {
+            res = ( 0 != (val & WINDOW_BIT) ) ;
+        } else {
+            res = ( 0 != (val & BITMAP_BIT) ) || usePBuffer ;
+        }
+        if ( usePBuffer ) {
+            res = res && ( 0 != (val & PBUFFER_BIT) ) ;
+        }
+
+        return res;
+    }
     public static GLCapabilities AttribList2GLCapabilities(GLProfile glp, int[] iattribs,
                                                          int niattribs,
                                                          int[] iresults,
-                                                         boolean requireRenderToWindow) {
+                                                         boolean relaxed, boolean onscreen, boolean usePBuffer) {
         GLCapabilities res = new GLCapabilities(glp);
+        int drawableTypeBits = WGLConfig2DrawableTypeBits(iattribs, niattribs, iresults);
+        if(WGLConfigDrawableTypeVerify(drawableTypeBits, onscreen, usePBuffer)) {
+            res.setOnscreen(onscreen);
+            res.setPBuffer(usePBuffer);
+        } else if(relaxed) {
+            res.setOnscreen( 0 != (drawableTypeBits & WINDOW_BIT) );
+            res.setPBuffer ( 0 != (drawableTypeBits & PBUFFER_BIT) );
+        } else {
+            return null;
+        }
+
         for (int i = 0; i < niattribs; i++) {
           int attr = iattribs[i];
           switch (attr) {
             case WGLExt.WGL_DRAW_TO_WINDOW_ARB:
-              if (requireRenderToWindow && iresults[i] != GL.GL_TRUE) {
-                return null;
-              }
-              break;
-
+            case WGLExt.WGL_DRAW_TO_BITMAP_ARB:
             case WGLExt.WGL_DRAW_TO_PBUFFER_ARB:
               break;
 
@@ -342,7 +404,7 @@ public class WindowsWGLGraphicsConfiguration extends DefaultGraphicsConfiguratio
 
   // PIXELFORMAT
 
-    public static GLCapabilities PFD2GLCapabilities(GLProfile glp, PIXELFORMATDESCRIPTOR pfd) {
+    public static GLCapabilities PFD2GLCapabilities(GLProfile glp, PIXELFORMATDESCRIPTOR pfd, boolean onscreen, boolean usePBuffer) {
         if ((pfd.dwFlags() & WGL.PFD_SUPPORT_OPENGL) == 0) {
           return null;
         }
@@ -359,8 +421,10 @@ public class WindowsWGLGraphicsConfiguration extends DefaultGraphicsConfiguratio
         res.setStencilBits   (pfd.cStencilBits());
         res.setDoubleBuffered((pfd.dwFlags() & WGL.PFD_DOUBLEBUFFER) != 0);
         res.setStereo        ((pfd.dwFlags() & WGL.PFD_STEREO) != 0);
-        res.setHardwareAccelerated(((pfd.dwFlags() & WGL.PFD_GENERIC_FORMAT) == 0) ||
-                       ((pfd.dwFlags() & WGL.PFD_GENERIC_ACCELERATED) != 0));
+        res.setHardwareAccelerated( ((pfd.dwFlags() & WGL.PFD_GENERIC_FORMAT) == 0) ||
+                                    ((pfd.dwFlags() & WGL.PFD_GENERIC_ACCELERATED) != 0) );
+        res.setOnscreen      ( onscreen && ((pfd.dwFlags() & WGL.PFD_DRAW_TO_WINDOW) != 0) );
+        res.setPBuffer       ( usePBuffer );
         /* FIXME: Missing ??
         if (GLXUtil.isMultisampleAvailable()) {
           res.setSampleBuffers(glXGetFBConfig(display, fbcfg, GLX.GLX_SAMPLE_BUFFERS, tmp, 0) != 0);
@@ -374,7 +438,7 @@ public class WindowsWGLGraphicsConfiguration extends DefaultGraphicsConfiguratio
         return res;
   }
 
-  public static PIXELFORMATDESCRIPTOR GLCapabilities2PFD(GLCapabilities caps, boolean offscreen) {
+  public static PIXELFORMATDESCRIPTOR GLCapabilities2PFD(GLCapabilities caps) {
     int colorDepth = (caps.getRedBits() +
                       caps.getGreenBits() +
                       caps.getBlueBits());
@@ -387,10 +451,10 @@ public class WindowsWGLGraphicsConfiguration extends DefaultGraphicsConfiguratio
     if (caps.getDoubleBuffered()) {
       pfdFlags |= WGL.PFD_DOUBLEBUFFER;
     }
-    if (offscreen) {
-      pfdFlags |= WGL.PFD_DRAW_TO_BITMAP;
-    } else {
+    if (caps.isOnscreen()) {
       pfdFlags |= WGL.PFD_DRAW_TO_WINDOW;
+    } else {
+      pfdFlags |= WGL.PFD_DRAW_TO_BITMAP;
     }
     if (caps.getStereo()) {
       pfdFlags |= WGL.PFD_STEREO;
diff --git a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
index df8081f05..f5974dc61 100644
--- a/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/sun/opengl/impl/windows/wgl/WindowsWGLGraphicsConfigurationFactory.java
@@ -54,29 +54,42 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
     public AbstractGraphicsConfiguration chooseGraphicsConfiguration(Capabilities capabilities,
                                                                      CapabilitiesChooser chooser,
                                                                      AbstractGraphicsScreen absScreen) {
-        return chooseGraphicsConfigurationStatic((GLCapabilities)capabilities, chooser, absScreen, false);
+        GLCapabilities caps = (GLCapabilities)capabilities;
+        return chooseGraphicsConfigurationStatic(caps, chooser, absScreen, caps.isOnscreen(), caps.isPBuffer());
     }
 
-    protected static WindowsWGLGraphicsConfiguration createDefaultGraphicsConfiguration(AbstractGraphicsScreen absScreen, boolean useOffScreen) {
+    protected static WindowsWGLGraphicsConfiguration createDefaultGraphicsConfiguration(AbstractGraphicsScreen absScreen, boolean onscreen, boolean usePBuffer) {
         GLCapabilities caps = new GLCapabilities(null);
+        caps.setOnscreen  (onscreen);
+        caps.setPBuffer   (usePBuffer);
+        if(!onscreen) {
+            caps.setDoubleBuffered(false);
+        }
+
         if(null==absScreen) {
             absScreen = DefaultGraphicsScreen.createScreenDevice(0);
         }
-        return new WindowsWGLGraphicsConfiguration(absScreen, caps, caps, WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps, useOffScreen), -1, null);
+        return new WindowsWGLGraphicsConfiguration(absScreen, caps, caps, WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps), -1, null);
     }
 
     protected static WindowsWGLGraphicsConfiguration chooseGraphicsConfigurationStatic(GLCapabilities caps,
                                                                                        CapabilitiesChooser chooser,
-                                                                                       AbstractGraphicsScreen absScreen, boolean useOffScreen) {
+                                                                                       AbstractGraphicsScreen absScreen, 
+                                                                                       boolean onscreen, boolean usePBuffer) {
         if(null==absScreen) {
             absScreen = DefaultGraphicsScreen.createScreenDevice(0);
         }
-        return new WindowsWGLGraphicsConfiguration(absScreen, caps, caps, WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps, useOffScreen), -1, 
+        caps.setOnscreen  (onscreen);
+        caps.setPBuffer   (usePBuffer);
+        if(!onscreen) {
+            caps.setDoubleBuffered(false);
+        }
+        return new WindowsWGLGraphicsConfiguration(absScreen, caps, caps, WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(caps), -1, 
                                                    (GLCapabilitiesChooser)chooser);
     }
 
     protected static void updateGraphicsConfiguration(CapabilitiesChooser chooser,
-                                                      GLDrawableFactory factory, NativeWindow nativeWindow, boolean useOffScreen) {
+                                                      GLDrawableFactory factory, NativeWindow nativeWindow) {
         if (nativeWindow == null) {
             throw new IllegalArgumentException("NativeWindow is null");
         }
@@ -88,6 +101,8 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
 
         WindowsWGLGraphicsConfiguration config = (WindowsWGLGraphicsConfiguration) nativeWindow.getGraphicsConfiguration().getNativeGraphicsConfiguration();
         GLCapabilities capabilities = (GLCapabilities) config.getRequestedCapabilities();
+        boolean onscreen = capabilities.isOnscreen();
+        boolean usePBuffer = capabilities.isPBuffer();
         GLProfile glProfile = capabilities.getGLProfile();
         long hdc = nativeWindow.getSurfaceHandle();
 
@@ -98,10 +113,11 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
         }
 
         PIXELFORMATDESCRIPTOR pfd = null;
-        int pixelFormat = 0;
+        int pixelFormat = -1;
+        boolean pixelFormatSet = false;
         GLCapabilities chosenCaps = null;
 
-        if (!useOffScreen) {
+        if (onscreen) {
           if ((pixelFormat = WGL.GetPixelFormat(hdc)) != 0) {
             // Pixelformat already set by either 
             //  - a previous updateGraphicsConfiguration() call on the same HDC,
@@ -111,14 +127,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
               System.err.println("!!!! NOTE: pixel format already chosen for HDC: 0x" + Long.toHexString(hdc)+
                                  ", pixelformat "+WGL.GetPixelFormat(hdc));
             }
-            pfd = WindowsWGLGraphicsConfiguration.createPixelFormatDescriptor();
-            if (WGL.DescribePixelFormat(hdc, pixelFormat, pfd.size(), pfd) == 0) {
-              // FIXME: should this just be a warning? Not really critical...
-              throw new GLException("Unable to describe pixel format " + pixelFormat +
-                                    " of window set by Java2D/OpenGL pipeline");
-            }
-            config.setCapsPFD(WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd), pfd, pixelFormat);
-            return;
+            pixelFormatSet = true;
           }
 
           GLCapabilities[] availableCaps = null;
@@ -129,15 +138,13 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
           WindowsWGLDrawable dummyDrawable = null;
           GLContextImpl     dummyContext  = null;
           WGLExt            dummyWGLExt   = null;
-          if (capabilities.getSampleBuffers()) {
-            dummyDrawable = new WindowsDummyWGLDrawable(factory);
-            dummyContext  = (GLContextImpl) dummyDrawable.createContext(null);
-            if (dummyContext != null) {
-              dummyContext.makeCurrent();
-              dummyWGLExt = (WGLExt) dummyContext.getPlatformGLExtensions();
-            }
+          dummyDrawable = new WindowsDummyWGLDrawable(factory);
+          dummyContext  = (GLContextImpl) dummyDrawable.createContext(null);
+          if (dummyContext != null) {
+            dummyContext.makeCurrent();
+            dummyWGLExt = (WGLExt) dummyContext.getPlatformGLExtensions();
           }      
-          int recommendedPixelFormat = -1;
+          int recommendedPixelFormat = pixelFormat - 1;
           boolean haveWGLChoosePixelFormatARB = false;
           boolean haveWGLARBMultisample = false;
           boolean gotAvailableCaps = false;
@@ -151,100 +158,103 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
                 int[]   iresults    = new int  [2*WindowsWGLGraphicsConfiguration.MAX_ATTRIBS];
                 float[] fattributes = new float[1];
 
-                if(WindowsWGLGraphicsConfiguration.GLCapabilities2AttribList(capabilities,
-                                                                             iattributes,
-                                                                             dummyWGLExt,
-                                                                             false,
-                                                                             null)) {
-                  int[] pformats = new int[WindowsWGLGraphicsConfiguration.MAX_PFORMATS];
-                  int[] numFormatsTmp = new int[1];
-                  if (dummyWGLExt.wglChoosePixelFormatARB(hdc,
-                                                       iattributes, 0,
-                                                       fattributes, 0,
-                                                       WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
-                                                       pformats, 0,
-                                                       numFormatsTmp, 0)) {
-                    numFormats = numFormatsTmp[0];
-                    if (numFormats > 0) {
-                      // Remove one-basing of pixel format (added on later)
-                      recommendedPixelFormat = pformats[0] - 1;
+                if(pixelFormat<=0) {
+                  if(WindowsWGLGraphicsConfiguration.GLCapabilities2AttribList(capabilities,
+                                                                               iattributes,
+                                                                               dummyWGLExt,
+                                                                               false,
+                                                                               null)) {
+                    int[] pformats = new int[WindowsWGLGraphicsConfiguration.MAX_PFORMATS];
+                    int[] numFormatsTmp = new int[1];
+                    if (dummyWGLExt.wglChoosePixelFormatARB(hdc,
+                                                         iattributes, 0,
+                                                         fattributes, 0,
+                                                         WindowsWGLGraphicsConfiguration.MAX_PFORMATS,
+                                                         pformats, 0,
+                                                         numFormatsTmp, 0)) {
+                      numFormats = numFormatsTmp[0];
+                      if (recommendedPixelFormat<=0 && numFormats > 0) {
+                        // Remove one-basing of pixel format (added on later)
+                        recommendedPixelFormat = pformats[0] - 1;
+                        if (DEBUG) {
+                          System.err.println(getThreadName() + ": Used wglChoosePixelFormatARB to recommend pixel format " + recommendedPixelFormat);
+                        }
+                      }
+                    } else {
                       if (DEBUG) {
-                        System.err.println(getThreadName() + ": Used wglChoosePixelFormatARB to recommend pixel format " + recommendedPixelFormat);
+                        System.err.println(getThreadName() + ": wglChoosePixelFormatARB failed: " + WGL.GetLastError() );
+                        Thread.dumpStack();
                       }
                     }
-                  } else {
                     if (DEBUG) {
-                      System.err.println(getThreadName() + ": wglChoosePixelFormatARB failed: " + WGL.GetLastError() );
-                      Thread.dumpStack();
-                    }
-                  }
-                  if (DEBUG) {
-                    if (recommendedPixelFormat < 0) {
-                      System.err.print(getThreadName() + ": wglChoosePixelFormatARB didn't recommend a pixel format");
-                      if (capabilities.getSampleBuffers()) {
-                        System.err.print(" for multisampled GLCapabilities");
+                      if (recommendedPixelFormat < 0) {
+                        System.err.print(getThreadName() + ": wglChoosePixelFormatARB didn't recommend a pixel format");
+                        if (capabilities.getSampleBuffers()) {
+                          System.err.print(" for multisampled GLCapabilities");
+                        }
+                        System.err.println();
                       }
-                      System.err.println();
                     }
                   }
+                }
 
-                  // Produce a list of GLCapabilities to give to the
-                  // GLCapabilitiesChooser.
-                  // Use wglGetPixelFormatAttribivARB instead of
-                  // DescribePixelFormat to get higher-precision information
-                  // about the pixel format (should make the GLCapabilities
-                  // more precise as well...i.e., remove the
-                  // "HardwareAccelerated" bit, which is basically
-                  // meaningless, and put in whether it can render to a
-                  // window, to a pbuffer, or to a pixmap)
-                  int niattribs = 0;
-                  iattributes[0] = WGLExt.WGL_NUMBER_PIXEL_FORMATS_ARB;
-                  if (dummyWGLExt.wglGetPixelFormatAttribivARB(hdc, 0, 0, 1, iattributes, 0, iresults, 0)) {
-                    numFormats = iresults[0];
+                // Produce a list of GLCapabilities to give to the
+                // GLCapabilitiesChooser.
+                // Use wglGetPixelFormatAttribivARB instead of
+                // DescribePixelFormat to get higher-precision information
+                // about the pixel format (should make the GLCapabilities
+                // more precise as well...i.e., remove the
+                // "HardwareAccelerated" bit, which is basically
+                // meaningless, and put in whether it can render to a
+                // window, to a pbuffer, or to a pixmap)
+                int niattribs = 0;
+                iattributes[0] = WGLExt.WGL_NUMBER_PIXEL_FORMATS_ARB;
+                if (dummyWGLExt.wglGetPixelFormatAttribivARB(hdc, 0, 0, 1, iattributes, 0, iresults, 0)) {
+                  numFormats = iresults[0];
 
-                    if (DEBUG) {
-                      System.err.println("wglGetPixelFormatAttribivARB reported WGL_NUMBER_PIXEL_FORMATS = " + numFormats);
-                    }
+                  if (DEBUG) {
+                    System.err.println("wglGetPixelFormatAttribivARB reported WGL_NUMBER_PIXEL_FORMATS = " + numFormats);
+                  }
 
-                    // Should we be filtering out the pixel formats which aren't
-                    // applicable, as we are doing here?
-                    // We don't have enough information in the GLCapabilities to
-                    // represent those that aren't...
-                    iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_WINDOW_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_ACCELERATION_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_SUPPORT_OPENGL_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_DEPTH_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_STENCIL_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_DOUBLE_BUFFER_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_STEREO_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_RED_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_GREEN_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_BLUE_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_ALPHA_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_ACCUM_RED_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_ACCUM_GREEN_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_ACCUM_BLUE_BITS_ARB;
-                    iattributes[niattribs++] = WGLExt.WGL_ACCUM_ALPHA_BITS_ARB;
-                    if (haveWGLARBMultisample) {
-                      iattributes[niattribs++] = WGLExt.WGL_SAMPLE_BUFFERS_ARB;
-                      iattributes[niattribs++] = WGLExt.WGL_SAMPLES_ARB;
-                    }
+                  // Should we be filtering out the pixel formats which aren't
+                  // applicable, as we are doing here?
+                  // We don't have enough information in the GLCapabilities to
+                  // represent those that aren't...
+                  iattributes[niattribs++] = WGLExt.WGL_DRAW_TO_WINDOW_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_ACCELERATION_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_SUPPORT_OPENGL_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_DEPTH_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_STENCIL_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_DOUBLE_BUFFER_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_STEREO_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_PIXEL_TYPE_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_RED_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_GREEN_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_BLUE_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_ALPHA_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_ACCUM_RED_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_ACCUM_GREEN_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_ACCUM_BLUE_BITS_ARB;
+                  iattributes[niattribs++] = WGLExt.WGL_ACCUM_ALPHA_BITS_ARB;
+                  if (haveWGLARBMultisample) {
+                    iattributes[niattribs++] = WGLExt.WGL_SAMPLE_BUFFERS_ARB;
+                    iattributes[niattribs++] = WGLExt.WGL_SAMPLES_ARB;
+                  }
 
-                    availableCaps = new GLCapabilities[numFormats];
-                    for (int i = 0; i < numFormats; i++) {
-                      if (!dummyWGLExt.wglGetPixelFormatAttribivARB(hdc, i+1, 0, niattribs, iattributes, 0, iresults, 0)) {
-                        throw new GLException("Error getting pixel format attributes for pixel format " + (i + 1) + " of device context");
-                      }
-                      availableCaps[i] = WindowsWGLGraphicsConfiguration.AttribList2GLCapabilities(glProfile, iattributes, niattribs, iresults, true);
-                    }
-                    gotAvailableCaps = true;
-                  } else {
-                    long lastErr = WGL.GetLastError();
-                    // Intel Extreme graphics fails with a zero error code
-                    if (lastErr != 0) {
-                      throw new GLException("Unable to enumerate pixel formats of window using wglGetPixelFormatAttribivARB: error code " + WGL.GetLastError());
+                  availableCaps = new GLCapabilities[numFormats];
+                  for (int i = 0; i < numFormats; i++) {
+                    if (!dummyWGLExt.wglGetPixelFormatAttribivARB(hdc, i+1, 0, niattribs, iattributes, 0, iresults, 0)) {
+                      throw new GLException("Error getting pixel format attributes for pixel format " + (i + 1) + " of device context");
                     }
+                    availableCaps[i] = WindowsWGLGraphicsConfiguration.AttribList2GLCapabilities(glProfile, iattributes, niattribs, iresults, 
+                                                                                                 pixelFormatSet, onscreen, usePBuffer);
+                  }
+                  gotAvailableCaps = true;
+                } else {
+                  long lastErr = WGL.GetLastError();
+                  // Intel Extreme graphics fails with a zero error code
+                  if (lastErr != 0) {
+                    throw new GLException("Unable to enumerate pixel formats of window using wglGetPixelFormatAttribivARB: error code " + WGL.GetLastError());
                   }
                 }
               }
@@ -264,7 +274,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
                 System.err.println(getThreadName() + ": Using ChoosePixelFormat because no wglChoosePixelFormatARB");
               }
             }
-            pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(capabilities, !useOffScreen);
+            pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(capabilities);
             recommendedPixelFormat = WGL.ChoosePixelFormat(hdc, pfd);
             if (DEBUG) {
               System.err.println(getThreadName() + ": Recommended pixel format = " + recommendedPixelFormat);
@@ -282,7 +292,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
               if (WGL.DescribePixelFormat(hdc, 1 + i, pfd.size(), pfd) == 0) {
                 throw new GLException("Error describing pixel format " + (1 + i) + " of device context");
               }
-              availableCaps[i] = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd);
+              availableCaps[i] = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd, onscreen, usePBuffer);
             }
           }
 
@@ -291,22 +301,24 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
           // chooseCapabilities call, but for the time being, assume they
           // won't be changed
 
-          if(null!=chooser) {
-              // Supply information to chooser
-              try {
-                pixelFormat = chooser.chooseCapabilities(capabilities, availableCaps, recommendedPixelFormat);
-              } catch (NativeWindowException e) {
-                throw new GLException(e);
+          if(pixelFormat<=0) {
+              if(null!=chooser) {
+                  // Supply information to chooser
+                  try {
+                    pixelFormat = chooser.chooseCapabilities(capabilities, availableCaps, recommendedPixelFormat);
+                  } catch (NativeWindowException e) {
+                    throw new GLException(e);
+                  }
+              } else {
+                  pixelFormat = recommendedPixelFormat;
               }
-          } else {
-              pixelFormat = recommendedPixelFormat;
-          }
-          if ((pixelFormat < 0) || (pixelFormat >= numFormats)) {
-            throw new GLException("Invalid result " + pixelFormat +
-                                  " from GLCapabilitiesChooser (should be between 0 and " +
-                                  (numFormats - 1) + ")");
+              if ((pixelFormat < 0) || (pixelFormat >= numFormats)) {
+                throw new GLException("Invalid result " + pixelFormat +
+                                      " from GLCapabilitiesChooser (should be between 0 and " +
+                                      (numFormats - 1) + ")");
+              }
+              pixelFormat += 1; // one-base the index
           }
-          pixelFormat += 1; // one-base the index
           chosenCaps = availableCaps[pixelFormat-1];
           if (DEBUG) {
             System.err.println(getThreadName() + ": Chosen pixel format (" + pixelFormat + "):");
@@ -319,17 +331,20 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
           // For now, use ChoosePixelFormat for offscreen surfaces until
           // we figure out how to properly choose an offscreen-
           // compatible pixel format
-          pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(capabilities, !useOffScreen);
+          pfd = WindowsWGLGraphicsConfiguration.GLCapabilities2PFD(capabilities);
           pixelFormat = WGL.ChoosePixelFormat(hdc, pfd);
         }
-        if (!WGL.SetPixelFormat(hdc, pixelFormat, pfd)) {
-          long lastError = WGL.GetLastError();
-          if (DEBUG) {
-            System.err.println(getThreadName() + ": SetPixelFormat failed: current context = " + WGL.wglGetCurrentContext() +
-                               ", current DC = " + WGL.wglGetCurrentDC());
-            System.err.println(getThreadName() + ": GetPixelFormat(hdc " + toHexString(hdc) + ") returns " + WGL.GetPixelFormat(hdc));
-          }
-          throw new GLException("Unable to set pixel format " + pixelFormat + " for device context " + toHexString(hdc) + ": error code " + lastError);
+        if(!pixelFormatSet) {
+            if (!WGL.SetPixelFormat(hdc, pixelFormat, pfd)) {
+              long lastError = WGL.GetLastError();
+              if (DEBUG) {
+                System.err.println(getThreadName() + ": SetPixelFormat failed: current context = " + WGL.wglGetCurrentContext() +
+                                   ", current DC = " + WGL.wglGetCurrentDC());
+                System.err.println(getThreadName() + ": GetPixelFormat(hdc " + toHexString(hdc) + ") returns " + WGL.GetPixelFormat(hdc));
+              }
+              throw new GLException("Unable to set pixel format " + pixelFormat + " for device context " + toHexString(hdc) + ": error code " + lastError);
+            }
+            pixelFormatSet=true;
         }
         // Reuse the previously-constructed GLCapabilities because it
         // turns out that using DescribePixelFormat on some pixel formats
@@ -338,7 +353,7 @@ public class WindowsWGLGraphicsConfigurationFactory extends GraphicsConfiguratio
         if (chosenCaps != null) {
           capabilities = chosenCaps;
         } else {
-          capabilities = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd);
+          capabilities = WindowsWGLGraphicsConfiguration.PFD2GLCapabilities(glProfile, pfd, onscreen, usePBuffer);
         }
         config.setCapsPFD(capabilities, pfd, pixelFormat);
     }
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXContext.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXContext.java
index 6491c33da..0603f1cf0 100755
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXContext.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXContext.java
@@ -40,6 +40,7 @@
 package com.sun.opengl.impl.x11.glx;
 
 import javax.media.nativewindow.*;
+import javax.media.nativewindow.x11.*;
 import javax.media.opengl.*;
 import com.sun.opengl.impl.*;
 import com.sun.nativewindow.impl.NullWindow;
@@ -50,21 +51,42 @@ public class X11ExternalGLXContext extends X11GLXContext {
   private boolean created = true;
   private GLContext lastContext;
 
-  public X11ExternalGLXContext(AbstractGraphicsScreen screen) {
-    super(null, null);
-    getDrawableImpl().getFactoryImpl().lockToolkit();
+  private X11ExternalGLXContext(Drawable drawable, long context) {
+    super(drawable, null);
+    this.drawable = drawable;
+    this.context = context;
+    GLContextShareSet.contextCreated(this);
+    setGLFunctionAvailability(false);
+  }
+
+  protected static X11ExternalGLXContext create(GLDrawableFactory factory, GLProfile glp) {
+    ((GLDrawableFactoryImpl)factory).lockToolkit();
     try {
-      context = GLX.glXGetCurrentContext();
-      if (context == 0) {
-        throw new GLException("Error: attempted to make an external GLContext without a drawable/context current");
-      }
-      NullWindow nw = new NullWindow(X11GLXGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(screen, false));
-      drawable = new Drawable(getGLDrawable().getFactory(), nw);
+        long context = GLX.glXGetCurrentContext();
+        if (context == 0) {
+          throw new GLException("Error: current context null");
+        }
+        long display = GLX.glXGetCurrentDisplay();
+        if (display == 0) {
+          throw new GLException("Error: current display null");
+        }
+        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];
+        GLX.glXQueryContext(display, context, GLX.GLX_SCREEN, val, 0);
+        X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val[0]);
+
+        GLX.glXQueryContext(display, context, GLX.GLX_FBCONFIG_ID, val, 0);
+        X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val[0]);
+
+        NullWindow nw = new NullWindow(cfg);
+        nw.setSurfaceHandle(drawable);
+        return new X11ExternalGLXContext(new Drawable(factory, nw), context);
     } finally {
-      getDrawableImpl().getFactoryImpl().unlockToolkit();
+        ((GLDrawableFactoryImpl)factory).unlockToolkit();
     }
-    GLContextShareSet.contextCreated(this);
-    setGLFunctionAvailability(false);
   }
 
   protected void create() {
@@ -108,7 +130,7 @@ public class X11ExternalGLXContext extends X11GLXContext {
   }
 
   // Need to provide the display connection to extension querying APIs
-  class Drawable extends X11GLXDrawable {
+  static class Drawable extends X11GLXDrawable {
     Drawable(GLDrawableFactory factory, NativeWindow comp) {
       super(factory, comp, true);
     }
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXDrawable.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXDrawable.java
index 9a5e42382..75a6b221a 100755
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11ExternalGLXDrawable.java
@@ -40,6 +40,7 @@
 package com.sun.opengl.impl.x11.glx;
 
 import javax.media.nativewindow.*;
+import javax.media.nativewindow.x11.*;
 import javax.media.opengl.*;
 import com.sun.opengl.impl.*;
 import com.sun.nativewindow.impl.NullWindow;
@@ -50,54 +51,58 @@ import com.sun.gluegen.runtime.PointerBuffer;
 public class X11ExternalGLXDrawable extends X11GLXDrawable {
   private int fbConfigID;
   private int renderType;
-  private long readDrawable;
 
-  private X11ExternalGLXDrawable(GLDrawableFactory factory, NativeWindow component) {
+  private X11ExternalGLXDrawable(GLDrawableFactory factory, NativeWindow component, int renderType) {
     super(factory, component, true);
 
-    readDrawable = GLX.glXGetCurrentReadDrawable();
+    this.renderType = renderType;
 
     // Need GLXFBConfig ID in order to properly create new contexts
     // on this drawable
-    long display = getNativeWindow().getDisplayHandle();
-    long context = GLX.glXGetCurrentContext();
-    int[] val = new int[1];
-    GLX.glXQueryContext(display, context, GLX.GLX_FBCONFIG_ID, val, 0);
-    fbConfigID = val[0];
-    renderType = GLX.GLX_RGBA_TYPE;
-    GLX.glXQueryContext(display, context, GLX.GLX_RENDER_TYPE, val, 0);
-    if ((val[0] & GLX.GLX_RGBA_BIT) == 0) {
-        if (DEBUG) {
-          System.err.println("X11ExternalGLXDrawable: WARNING: forcing GLX_RGBA_TYPE for newly created contexts");
-        }
-    }
+    X11GLXGraphicsConfiguration cfg = (X11GLXGraphicsConfiguration) component.getGraphicsConfiguration();
+    fbConfigID = cfg.getFBConfigID();
   }
 
-  protected static X11ExternalGLXDrawable create(GLDrawableFactory factory, AbstractGraphicsScreen aScreen) {
-    ((GLDrawableFactoryImpl) factory).lockToolkit();
+  protected static X11ExternalGLXDrawable create(GLDrawableFactory factory, GLProfile glp) {
+    ((GLDrawableFactoryImpl)factory).lockToolkit();
     try {
-      long display = GLX.glXGetCurrentDisplay();
-      long context = GLX.glXGetCurrentContext();
-      int[] val = new int[1];
-      GLX.glXQueryContext(display, context, GLX.GLX_SCREEN, val, 0);
-      int screen = val[0];
-      long drawable = GLX.glXGetCurrentDrawable();
-      if (drawable == 0) {
-        throw new GLException("Error: attempted to make an external GLDrawable without a drawable/context current");
-      }
-
-      if(screen!=aScreen.getIndex()) {
-        throw new GLException("Error: Passed AbstractGraphicsScreen's index is not current: "+aScreen+", GLX-screen "+screen);
-      }
-      if(display!=aScreen.getDevice().getHandle()) {
-        throw new GLException("Error: Passed AbstractGraphicsScreen's display is not current: "+aScreen+", GLX-display 0x"+Long.toHexString(display));
-      }
-
-      NullWindow nw = new NullWindow(X11GLXGraphicsConfigurationFactory.createDefaultGraphicsConfiguration(aScreen, false));
-      nw.setSurfaceHandle(drawable);
-      return new X11ExternalGLXDrawable(factory, nw);
+        long context = GLX.glXGetCurrentContext();
+        if (context == 0) {
+          throw new GLException("Error: current context null");
+        }
+        long display = GLX.glXGetCurrentDisplay();
+        if (display == 0) {
+          throw new GLException("Error: current display null");
+        }
+        long drawable = GLX.glXGetCurrentDrawable();
+        if (drawable == 0) {
+          throw new GLException("Error: attempted to make an external GLDrawable without a drawable current");
+        }
+        int[] val = new int[1];
+        GLX.glXQueryContext(display, context, GLX.GLX_SCREEN, val, 0);
+        X11GraphicsScreen x11Screen = (X11GraphicsScreen) X11GraphicsScreen.createScreenDevice(display, val[0]);
+
+        GLX.glXQueryContext(display, context, GLX.GLX_FBCONFIG_ID, val, 0);
+        X11GLXGraphicsConfiguration cfg = X11GLXGraphicsConfiguration.create(glp, x11Screen, val[0]);
+
+        int w, h;
+        GLX.glXQueryDrawable(display, drawable, GLX.GLX_WIDTH, val, 0);
+        w=val[0];
+        GLX.glXQueryDrawable(display, drawable, GLX.GLX_HEIGHT, val, 0);
+        h=val[0];
+
+        GLX.glXQueryContext(display, context, GLX.GLX_RENDER_TYPE, val, 0);
+        if ((val[0] & GLX.GLX_RGBA_TYPE) == 0) {
+          if (DEBUG) {
+            System.err.println("X11ExternalGLXDrawable: WARNING: forcing GLX_RGBA_TYPE for newly created contexts (current 0x"+Integer.toHexString(val[0])+")");
+          }
+        }
+        NullWindow nw = new NullWindow(cfg);
+        nw.setSurfaceHandle(drawable);
+        nw.setSize(w, h);
+        return new X11ExternalGLXDrawable(factory, nw, GLX.GLX_RGBA_TYPE);
     } finally {
-      ((GLDrawableFactoryImpl) factory).unlockToolkit();
+        ((GLDrawableFactoryImpl)factory).unlockToolkit();
     }
   }
 
@@ -110,11 +115,11 @@ public class X11ExternalGLXDrawable extends X11GLXDrawable {
   }
 
   public int getWidth() {
-    throw new GLException("Should not call this");
+    return getNativeWindow().getWidth();
   }  
 
   public int getHeight() {
-    throw new GLException("Should not call this");
+    return getNativeWindow().getHeight();
   }  
 
   class Context extends X11GLXContext {
@@ -122,113 +127,8 @@ public class X11ExternalGLXDrawable extends X11GLXDrawable {
       super(drawable, shareWith);
     }
 
-    protected int makeCurrentImpl() throws GLException {
-      if (drawable.getNativeWindow().getSurfaceHandle() == 0) {
-        // parent drawable not properly initialized
-        // FIXME: signal error?
-        if (DEBUG) {
-          System.err.println("parent drawable not properly initialized");
-        }
-        return CONTEXT_NOT_CURRENT;
-      }
-
-      // Note that we have to completely override makeCurrentImpl
-      // because the underlying makeCurrent call differs from the norm
-      getFactoryImpl().lockToolkit();
-      try {
-        boolean created = false;
-        if (context == 0) {
-          create();
-          if (DEBUG) {
-            System.err.println(getThreadName() + ": !!! Created GL context for " + getClass().getName());
-          }
-          created = true;
-        }
-
-        if (!GLX.glXMakeContextCurrent(drawable.getNativeWindow().getDisplayHandle(),
-                                       drawable.getNativeWindow().getSurfaceHandle(),
-                                       readDrawable,
-                                       context)) {
-          throw new GLException("Error making context current");
-        } else {
-          if (DEBUG && VERBOSE) {
-            System.err.println(getThreadName() + ": glXMakeCurrent(display " + toHexString(drawable.getNativeWindow().getDisplayHandle()) +
-                               ", drawable " + toHexString(drawable.getNativeWindow().getSurfaceHandle()) +
-                               ", context " + toHexString(context) + ") succeeded");
-          }
-        }
-
-        if (created) {
-          setGLFunctionAvailability(false);
-          return CONTEXT_CURRENT_NEW;
-        }
-        return CONTEXT_CURRENT;
-      } finally {
-        getFactoryImpl().unlockToolkit();
-      }
-    }
-
-    protected void releaseImpl() throws GLException {
-      getFactoryImpl().lockToolkit();
-      try {
-        if (!GLX.glXMakeContextCurrent(drawable.getNativeWindow().getDisplayHandle(), 0, 0, 0)) {
-          throw new GLException("Error freeing OpenGL context");
-        }
-      } finally {
-        getFactoryImpl().unlockToolkit();
-      }
-    }
-
     protected void create() {
-      long display = getNativeWindow().getDisplayHandle();
-      int screen = getNativeWindow().getScreenIndex();
-      // We already have the GLXFBConfig ID for the context. All we
-      // need to do is use it to choose the GLXFBConfig and then
-      // create a context with it.
-      int[]   iattributes = new int[] {
-        GLX.GLX_FBCONFIG_ID,
-        fbConfigID,
-        0,
-        0
-      };
-      float[] fattributes = new float[0];
-      int[] nelementsTmp = new int[1];
-      PointerBuffer fbConfigs = GLX.glXChooseFBConfigCopied(display, screen, iattributes, 0, nelementsTmp, 0);
-      int nelements = nelementsTmp[0];
-      if (nelements <= 0) {
-        throw new GLException("context creation error: couldn't find a suitable frame buffer configuration");
-      }
-      if (nelements != 1) {
-        throw new GLException("context creation error: shouldn't get more than one GLXFBConfig");
-      }
-      // Note that we currently don't allow selection of anything but
-      // the first GLXFBConfig in the returned list (there should be only one)
-      long fbConfig = fbConfigs.get(0);
-      // Create a gl context for the drawable
-      X11GLXContext other = (X11GLXContext) GLContextShareSet.getShareContext(this);
-      long share = 0;
-      if (other != null) {
-        share = other.getContext();
-        if (share == 0) {
-          throw new GLException("GLContextShareSet returned an invalid OpenGL context");
-        }
-      }
-      // FIXME: how to determine "direct" bit?
-      context = GLX.glXCreateNewContext(display, fbConfig, renderType, share, true);
-      if (context == 0) {
-        String detail = "  display=" + toHexString(display) +
-          " fbconfig=" + fbConfig +
-          " fbconfigID=" + toHexString(fbConfigID) +
-          " renderType=" + toHexString(renderType) +
-          " share=" + toHexString(share);
-        throw new GLException("context creation error: glXCreateNewContext() failed: " + detail);
-      }
-      GLContextShareSet.contextCreated(this);
-
-      if (DEBUG) {
-        System.err.println("Created context " + toHexString(context) +
-                           " for GLXDrawable " + toHexString(drawable.getNativeWindow().getSurfaceHandle()));
-      }
+      createContext(true);
     }
   }
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXContext.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXContext.java
index 7029b81b0..57abcf588 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXContext.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXContext.java
@@ -117,8 +117,15 @@ public abstract class X11GLXContext extends GLContextImpl {
   /**
    * Creates and initializes an appropriate OpenGL context. Should only be
    * called by {@link create()}.
+   * Note: The direct parameter may be overwritten by the direct state of a shared context.
    */
-  protected void createContext(boolean onscreen) {
+  protected void createContext(boolean direct) {
+    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration();
+    if(DEBUG) {
+          System.err.println("X11GLXContext.createContext got "+config);
+    }
+    long display = config.getScreen().getDevice().getHandle();
+
     X11GLXContext other = (X11GLXContext) GLContextShareSet.getShareContext(this);
     long share = 0;
     if (other != null) {
@@ -126,14 +133,10 @@ public abstract class X11GLXContext extends GLContextImpl {
       if (share == 0) {
         throw new GLException("GLContextShareSet returned an invalid OpenGL context");
       }
+      direct = GLX.glXIsDirect(display, share);
     }
 
-    X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)drawable.getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration();
-    if(DEBUG) {
-          System.err.println("X11GLXContext.createContext got "+config);
-    }
     GLCapabilities glCaps = (GLCapabilities) config.getChosenCapabilities();
-    long display = config.getScreen().getDevice().getHandle();
     isVendorATI = GLXUtil.isVendorATI(display);
 
     if(config.getFBConfigID()<0) {
@@ -141,7 +144,7 @@ public abstract class X11GLXContext extends GLContextImpl {
         if(glCaps.getGLProfile().isGL3()) {
           throw new GLException("Unable to create OpenGL 3.1 context");
         }
-        context = GLX.glXCreateContext(display, config.getXVisualInfo(), share, onscreen);
+        context = GLX.glXCreateContext(display, config.getXVisualInfo(), share, direct);
         if (context == 0) {
           throw new GLException("Unable to create OpenGL context");
         }
@@ -160,7 +163,7 @@ public abstract class X11GLXContext extends GLContextImpl {
 
         // To use GLX_ARB_create_context, we have to make a temp context current,
         // so we are able to use GetProcAddress
-        long temp_context = GLX.glXCreateNewContext(display, config.getFBConfig(), GLX.GLX_RGBA_TYPE, share, onscreen);
+        long temp_context = GLX.glXCreateNewContext(display, config.getFBConfig(), GLX.GLX_RGBA_TYPE, share, direct);
         if (temp_context == 0) {
             throw new GLException("Unable to create temp OpenGL context");
         } else {
@@ -205,7 +208,7 @@ public abstract class X11GLXContext extends GLContextImpl {
                     attribs[5] |= GLX.GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB /* | GLX.GLX_CONTEXT_DEBUG_BIT_ARB */;
                 }
 
-                context = glXExt.glXCreateContextAttribsARB(display, config.getFBConfig(), share, onscreen, attribs, 0);
+                context = glXExt.glXCreateContextAttribsARB(display, config.getFBConfig(), share, direct, attribs, 0);
                 if(0==context) {
                     if(glCaps.getGLProfile().isGL3()) {
                       if (!GLX.glXMakeContextCurrent(display, 0, 0, 0)) {
@@ -245,41 +248,46 @@ public abstract class X11GLXContext extends GLContextImpl {
   }
 
   protected int makeCurrentImpl() throws GLException {
-    if (drawable.getNativeWindow().getSurfaceHandle() == 0) {
-        if (DEBUG) {
-          System.err.println("drawable not properly initialized");
+    getDrawableImpl().getFactoryImpl().lockToolkit();
+    try {
+        if (drawable.getNativeWindow().getSurfaceHandle() == 0) {
+            if (DEBUG) {
+              System.err.println("drawable not properly initialized");
+            }
+            return CONTEXT_NOT_CURRENT;
         }
-        return CONTEXT_NOT_CURRENT;
-    }
-    boolean created = false;
-    if (context == 0) {
-      create();
-      if (DEBUG) {
-        System.err.println(getThreadName() + ": !!! Created GL context for " + getClass().getName());
-      }
-      created = true;
-    }
-
-    if (GLX.glXGetCurrentContext() != context) {
-        if (!GLX.glXMakeContextCurrent(drawable.getNativeWindow().getDisplayHandle(), 
-                                       drawable.getNativeWindow().getSurfaceHandle(), 
-                                       drawable.getNativeWindow().getSurfaceHandle(), 
-                                       context)) {
-          throw new GLException("Error making context current");
+        boolean created = false;
+        if (context == 0) {
+          create();
+          if (DEBUG) {
+            System.err.println(getThreadName() + ": !!! Created GL context for " + getClass().getName());
+          }
+          created = true;
         }
-        if (DEBUG && (VERBOSE || created)) {
-          System.err.println(getThreadName() + ": glXMakeCurrent(display " + 
-                             toHexString(drawable.getNativeWindow().getDisplayHandle()) +
-                             ", drawable " + toHexString(drawable.getNativeWindow().getSurfaceHandle()) +
-                             ", context " + toHexString(context) + ") succeeded");
+
+        if (GLX.glXGetCurrentContext() != context) {
+            if (!GLX.glXMakeContextCurrent(drawable.getNativeWindow().getDisplayHandle(), 
+                                           drawable.getNativeWindow().getSurfaceHandle(), 
+                                           drawable.getNativeWindow().getSurfaceHandle(), 
+                                           context)) {
+              throw new GLException("Error making context current");
+            }
+            if (DEBUG && (VERBOSE || created)) {
+              System.err.println(getThreadName() + ": glXMakeCurrent(display " + 
+                                 toHexString(drawable.getNativeWindow().getDisplayHandle()) +
+                                 ", drawable " + toHexString(drawable.getNativeWindow().getSurfaceHandle()) +
+                                 ", context " + toHexString(context) + ") succeeded");
+            }
         }
-    }
 
-    if (created) {
-      setGLFunctionAvailability(false);
-      return CONTEXT_CURRENT_NEW;
+        if (created) {
+          setGLFunctionAvailability(false);
+          return CONTEXT_CURRENT_NEW;
+        }
+        return CONTEXT_CURRENT;
+    } finally {
+        getDrawableImpl().getFactoryImpl().unlockToolkit();
     }
-    return CONTEXT_CURRENT;
   }
 
   protected void releaseImpl() throws GLException {
@@ -386,14 +394,23 @@ public abstract class X11GLXContext extends GLContextImpl {
   }
 
 
+  private int hasSwapIntervalSGI = 0;
+
   public void setSwapInterval(int interval) {
     getDrawableImpl().getFactoryImpl().lockToolkit();
     try {
       // FIXME: make the context current first? Currently assumes that
       // will not be necessary. Make the caller do this?
       GLXExt glXExt = getGLXExt();
-      if (glXExt.isExtensionAvailable("GLX_SGI_swap_control")) {
-        glXExt.glXSwapIntervalSGI(interval);
+      if(0==hasSwapIntervalSGI) {
+        try {
+            hasSwapIntervalSGI = glXExt.isExtensionAvailable("GLX_SGI_swap_control")?1:-1;
+        } catch (Throwable t) { hasSwapIntervalSGI=1; }
+      }
+      if (hasSwapIntervalSGI>0) {
+        try {
+            glXExt.glXSwapIntervalSGI(interval);
+        } catch (Throwable t) { hasSwapIntervalSGI=-1; }
       }
     } finally {
       getDrawableImpl().getFactoryImpl().unlockToolkit();
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawable.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawable.java
index a454cc429..738714ecb 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawable.java
@@ -67,6 +67,7 @@ public abstract class X11GLXDrawable extends GLDrawableImpl {
     try {
         X11GLXGraphicsConfiguration config = (X11GLXGraphicsConfiguration)getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration();
         config.updateGraphicsConfiguration();
+
         if (DEBUG) {
           System.err.println("!!! X11GLXDrawable.setRealized(true): "+config);
         }
@@ -75,6 +76,29 @@ public abstract class X11GLXDrawable extends GLDrawableImpl {
     }
   }
 
+  public void swapBuffers() throws GLException {
+    GLCapabilities caps = (GLCapabilities)getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration().getChosenCapabilities();
+    if (caps.getDoubleBuffered()) {
+        boolean didLock = false;
+        try {
+          if ( !isSurfaceLocked() ) {
+              // Usually the surface shall be locked within [makeCurrent .. swap .. release]
+              if (lockSurface() == NativeWindow.LOCK_SURFACE_NOT_READY) {
+                  return;
+              }
+              didLock=true;
+          }
+
+          GLX.glXSwapBuffers(component.getDisplayHandle(), component.getSurfaceHandle());
+
+        } finally {
+          if(didLock) {
+              unlockSurface();
+          }
+        }
+    }
+  }
+
   //---------------------------------------------------------------------------
   // Internals only below this point
   //
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawableFactory.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawableFactory.java
index de211af79..acca5fe81 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawableFactory.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXDrawableFactory.java
@@ -140,8 +140,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl implements Dyna
   }
 
   public GLContext createExternalGLContext() {
-    AbstractGraphicsScreen screen = X11GraphicsScreen.createDefault();
-    return new X11ExternalGLXContext(screen);
+    return X11ExternalGLXContext.create(this, null);
   }
 
   public boolean canCreateExternalGLDrawable() {
@@ -149,8 +148,7 @@ public class X11GLXDrawableFactory extends GLDrawableFactoryImpl implements Dyna
   }
 
   public GLDrawable createExternalGLDrawable() {
-    AbstractGraphicsScreen screen = X11GraphicsScreen.createDefault();
-    return X11ExternalGLXDrawable.create(this, screen);
+    return X11ExternalGLXDrawable.create(this, null);
   }
 
   public void loadGLULibrary() {
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfiguration.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfiguration.java
index 7b59a8d56..4cd174bec 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfiguration.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfiguration.java
@@ -38,6 +38,7 @@ import javax.media.nativewindow.x11.*;
 import javax.media.opengl.*;
 import com.sun.opengl.impl.*;
 import com.sun.gluegen.runtime.NativeLibrary;
+import com.sun.gluegen.runtime.PointerBuffer;
 import com.sun.nativewindow.impl.x11.*;
 
 public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implements Cloneable {
@@ -57,6 +58,30 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         fbConfigID = fbcfgID;
     }
 
+    public static X11GLXGraphicsConfiguration create(GLProfile glp, X11GraphicsScreen x11Screen, int fbcfgID) {
+      long display = x11Screen.getDevice().getHandle();
+      if(0==display) {
+          throw new GLException("Display null of "+x11Screen);
+      }
+      int screen = x11Screen.getIndex();
+      long fbcfg = glXFBConfigID2FBConfig(display, screen, fbcfgID);
+      if(0==fbcfg) {
+          throw new GLException("FBConfig null of 0x"+Integer.toHexString(fbcfgID));
+      }
+      if(null==glp) {
+        glp = GLProfile.getDefault();
+      }
+      GLCapabilities caps = GLXFBConfig2GLCapabilities(glp, display, fbcfg, true, true, true, GLXUtil.isMultisampleAvailable(display));
+      if(null==caps) {
+          throw new GLException("GLCapabilities null of 0x"+Long.toHexString(fbcfg));
+      }
+      XVisualInfo xvi = GLX.glXGetVisualFromFBConfigCopied(display, fbcfg);
+      if(null==xvi) {
+          throw new GLException("XVisualInfo null of 0x"+Long.toHexString(fbcfg));
+      }
+      return new X11GLXGraphicsConfiguration(x11Screen, caps, caps, new DefaultGLCapabilitiesChooser(), xvi, fbcfg, fbcfgID);
+    }
+
     public Object clone() {
         return super.clone();
     }
@@ -84,7 +109,6 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     public static int[] GLCapabilities2AttribList(GLCapabilities caps,
                                                   boolean forFBAttr,
                                                   boolean isMultisampleAvailable,
-                                                  boolean usePBuffer,
                                                   long display,
                                                   int screen) 
     {
@@ -99,7 +123,7 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
 
         if (forFBAttr) {
           res[idx++] = GLX.GLX_DRAWABLE_TYPE;
-          res[idx++] = usePBuffer?GLX.GLX_PBUFFER_BIT:GLX.GLX_WINDOW_BIT;
+          res[idx++] = caps.isOnscreen() ? ( GLX.GLX_WINDOW_BIT ) : ( caps.isPBuffer() ? GLX.GLX_PBUFFER_BIT : GLX.GLX_PIXMAP_BIT ) ;
         }
 
         if (forFBAttr) {
@@ -169,7 +193,7 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
           res[idx++] = GLX.GLX_SAMPLES;
           res[idx++] = caps.getNumSamples();
         }
-        if (usePBuffer) {
+        if (caps.isPBuffer()) {
           if (caps.getPbufferFloatingPointBuffers()) {
             String glXExtensions = GLX.glXQueryExtensionsString(display, screen);
             if (glXExtensions == null ||
@@ -184,111 +208,33 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
         return res;
   }
 
-  public static GLCapabilities AttribList2GLCapabilities(GLProfile glp, 
-                                                         int[] iattribs,
-                                                         int niattribs,
-                                                         int[] ivalues,
-                                                         boolean usePBuffer) {
-    GLCapabilities caps = new GLCapabilities(glp);
-
-    for (int i = 0; i < niattribs; i++) {
-      int attr = iattribs[i];
-      switch (attr) {
-        case GLX.GLX_DOUBLEBUFFER:
-          caps.setDoubleBuffered(ivalues[i] != GL.GL_FALSE);
-          break;
-
-        case GLX.GLX_STEREO:
-          caps.setStereo(ivalues[i] != GL.GL_FALSE);
-          break;
-
-        case GLX.GLX_RED_SIZE:
-          caps.setRedBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_GREEN_SIZE:
-          caps.setGreenBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_BLUE_SIZE:
-          caps.setBlueBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_ALPHA_SIZE:
-          caps.setAlphaBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_DEPTH_SIZE:
-          caps.setDepthBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_STENCIL_SIZE:
-          caps.setStencilBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_ACCUM_RED_SIZE:
-          caps.setAccumRedBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_ACCUM_GREEN_SIZE:
-          caps.setAccumGreenBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_ACCUM_BLUE_SIZE:
-          caps.setAccumBlueBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_ACCUM_ALPHA_SIZE:
-          caps.setAccumAlphaBits(ivalues[i]);
-          break;
-
-        case GLX.GLX_SAMPLE_BUFFERS:
-          caps.setSampleBuffers(ivalues[i] != GL.GL_FALSE);
-          break;
-
-        case GLX.GLX_SAMPLES:
-          caps.setNumSamples(ivalues[i]);
-          break;
-
-        case GLX.GLX_CONFIG_CAVEAT:
-          caps.setHardwareAccelerated(ivalues[i] != GLX.GLX_SLOW_CONFIG);
-          break;
-          
-        case GLX.GLX_TRANSPARENT_TYPE:
-          caps.setBackgroundOpaque(ivalues[i] == GLX.GLX_NONE);
-          break;
-          
-        case GLXExt.GLX_FLOAT_COMPONENTS_NV:
-          caps.setPbufferFloatingPointBuffers(ivalues[i] != GL.GL_FALSE);
-          break;
-
-        case GLX.GLX_TRANSPARENT_RED_VALUE:
-          caps.setTransparentRedValue(ivalues[i]);
-          break;
-
-        case GLX.GLX_TRANSPARENT_GREEN_VALUE:
-          caps.setTransparentGreenValue(ivalues[i]);
-          break;
-
-        case GLX.GLX_TRANSPARENT_BLUE_VALUE:
-          caps.setTransparentBlueValue(ivalues[i]);
-          break;
-
-        case GLX.GLX_TRANSPARENT_ALPHA_VALUE:
-          caps.setTransparentAlphaValue(ivalues[i]);
-          break;
-
-        default:
-          break;
-      }
-    }
+  // FBConfig
 
-    return caps;
+  public static boolean GLXFBConfigValid(long display, long fbcfg) {
+    int[] tmp = new int[1];
+    if(GLX.GLX_BAD_ATTRIBUTE == GLX.glXGetFBConfigAttrib(display, fbcfg, GLX.GLX_RENDER_TYPE, tmp, 0)) {
+      return false;
+    }
+    return true;
   }
 
-  // FBConfig
+  public static boolean GLXFBConfigDrawableTypeVerify(int val, boolean onscreen, boolean usePBuffer) {
+    boolean res;
 
-  public static GLCapabilities GLXFBConfig2GLCapabilities(GLProfile glp, long display, long fbcfg, boolean isMultisampleEnabled) {
+    if ( onscreen ) {
+        res = ( 0 != (val & GLX.GLX_WINDOW_BIT) ) ;
+    } else {
+        res = ( 0 != (val & GLX.GLX_PIXMAP_BIT) ) || usePBuffer ;
+    }
+    if ( usePBuffer ) {
+        res = res && ( 0 != (val & GLX.GLX_PBUFFER_BIT) ) ;
+    }
+
+    return res;
+  }
+
+  public static GLCapabilities GLXFBConfig2GLCapabilities(GLProfile glp, long display, long fbcfg, 
+                                                          boolean relaxed, boolean onscreen, boolean usePBuffer, boolean isMultisampleEnabled) {
     int[] tmp = new int[1];
     int val;
     val = glXGetFBConfig(display, fbcfg, GLX.GLX_RENDER_TYPE, tmp, 0);
@@ -296,6 +242,17 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
       throw new GLException("Visual does not support RGBA");
     }
     GLCapabilities res = new GLCapabilities(glp);
+
+    val = glXGetFBConfig(display, fbcfg, GLX.GLX_DRAWABLE_TYPE, tmp, 0);
+    if(GLXFBConfigDrawableTypeVerify(val, onscreen, usePBuffer)) {
+        res.setOnscreen(onscreen);
+        res.setPBuffer(usePBuffer);
+    } else if(relaxed) {
+        res.setOnscreen( 0 != (val & GLX.GLX_WINDOW_BIT) );
+        res.setPBuffer ( 0 != (val & GLX.GLX_PBUFFER_BIT) );
+    } else {
+        return null;
+    }
     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);
@@ -352,6 +309,21 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
     return tmp[tmp_offset];
   }
 
+  public static int glXFBConfig2FBConfigID(long display, long cfg) {
+      int[] tmpID = new int[1];
+      return glXGetFBConfig(display, cfg, GLX.GLX_FBCONFIG_ID, tmpID, 0);
+  }
+
+  public static long glXFBConfigID2FBConfig(long display, int screen, int id) {
+      int[] attribs = new int[] { GLX.GLX_FBCONFIG_ID, id, 0 };
+      int[] count = { -1 };
+      PointerBuffer fbcfgsL = GLX.glXChooseFBConfigCopied(display, screen, attribs, 0, count, 0);
+      if (fbcfgsL == null || fbcfgsL.limit()<1) {
+          return 0;
+      }
+      return fbcfgsL.get(0);
+  }
+
   // Visual Info
 
   public static XVisualInfo XVisualID2XVisualInfo(long display, long visualID) {
@@ -376,7 +348,7 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
       return res;
   }
 
-  public static GLCapabilities XVisualInfo2GLCapabilities(GLProfile glp, long display, XVisualInfo info, boolean isMultisampleEnabled) {
+  public static GLCapabilities XVisualInfo2GLCapabilities(GLProfile glp, long display, XVisualInfo info, boolean onscreen, boolean usePBuffer, boolean isMultisampleEnabled) {
     int[] tmp = new int[1];
     int val = glXGetConfig(display, info, GLX.GLX_USE_GL, tmp, 0);
     if (val == 0) {
@@ -387,6 +359,8 @@ public class X11GLXGraphicsConfiguration extends X11GraphicsConfiguration implem
       throw new GLException("Visual does not support RGBA");
     }
     GLCapabilities res = new GLCapabilities(glp);
+    res.setOnscreen      (onscreen);
+    res.setPBuffer       (usePBuffer);
     res.setDoubleBuffered(glXGetConfig(display, info, GLX.GLX_DOUBLEBUFFER,     tmp, 0) != 0);
     res.setStereo        (glXGetConfig(display, info, GLX.GLX_STEREO,           tmp, 0) != 0);
     // Note: use of hardware acceleration is determined by
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfigurationFactory.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfigurationFactory.java
index 0fcb9b3ff..9cb7eac08 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfigurationFactory.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11GLXGraphicsConfigurationFactory.java
@@ -58,10 +58,10 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
     public AbstractGraphicsConfiguration chooseGraphicsConfiguration(Capabilities capabilities,
                                                                      CapabilitiesChooser chooser,
                                                                      AbstractGraphicsScreen absScreen) {
-        return chooseGraphicsConfigurationStatic(capabilities, chooser, absScreen, false);
+        return chooseGraphicsConfigurationStatic(capabilities, chooser, absScreen, capabilities.isOnscreen(), false);
     }
 
-    protected static X11GLXGraphicsConfiguration createDefaultGraphicsConfiguration(AbstractGraphicsScreen absScreen, boolean usePBuffer) {
+    protected static X11GLXGraphicsConfiguration createDefaultGraphicsConfiguration(AbstractGraphicsScreen absScreen, boolean onscreen, boolean usePBuffer) {
       if (absScreen == null) {
         throw new IllegalArgumentException("AbstractGraphicsScreen is null");
       }
@@ -87,19 +87,18 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
 
           long visID = X11Lib.DefaultVisualID(display, x11Screen.getIndex());
           xvis = X11GLXGraphicsConfiguration.XVisualID2XVisualInfo(display, visID);
-          caps = X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(glProfile, display, xvis, isMultisampleAvailable);
+          caps = X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(glProfile, display, xvis, onscreen, usePBuffer, isMultisampleAvailable);
 
-          int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(caps, true, isMultisampleAvailable, usePBuffer, 0, 0);
+          int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(caps, true, isMultisampleAvailable, 0, 0);
           int[] count = { -1 };
           PointerBuffer fbcfgsL = GLX.glXChooseFBConfigCopied(display, screen, attribs, 0, count, 0);
           if (fbcfgsL == null || fbcfgsL.limit()<1) {
               throw new Exception("Could not fetch FBConfig for "+caps);
           }
           fbcfg = fbcfgsL.get(0);
-          capsFB = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glProfile, display, fbcfg, isMultisampleAvailable);
+          capsFB = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glProfile, display, fbcfg, true, onscreen, usePBuffer, isMultisampleAvailable);
 
-          int[] tmpID = new int[1];
-          fbid = X11GLXGraphicsConfiguration.glXGetFBConfig(display, fbcfg, GLX.GLX_FBCONFIG_ID, tmpID, 0);
+          fbid = X11GLXGraphicsConfiguration.glXFBConfig2FBConfigID(display, fbcfg);
 
           xvis = GLX.glXGetVisualFromFBConfigCopied(display, fbcfg);
           if (xvis==null) {
@@ -110,13 +109,13 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
           NativeWindowFactory.getDefaultFactory().getToolkitLock().unlock();
       }
 
-        return new X11GLXGraphicsConfiguration(x11Screen, (null!=capsFB)?capsFB:caps, caps, null, xvis, fbcfg, fbid);
+      return new X11GLXGraphicsConfiguration(x11Screen, (null!=capsFB)?capsFB:caps, caps, null, xvis, fbcfg, fbid);
     }
 
     protected static X11GLXGraphicsConfiguration chooseGraphicsConfigurationStatic(Capabilities capabilities,
                                                                                    CapabilitiesChooser chooser,
                                                                                    AbstractGraphicsScreen absScreen, 
-                                                                                   boolean usePBuffer) {
+                                                                                   boolean onscreen, boolean usePBuffer) {
         if (absScreen == null) {
             throw new IllegalArgumentException("AbstractGraphicsScreen is null");
         }
@@ -139,12 +138,16 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
         if (capabilities == null) {
             capabilities = new GLCapabilities(null);
         }
-
+        capabilities.setOnscreen  (onscreen);
+        ((GLCapabilities)capabilities).setPBuffer   (usePBuffer);
+        if(!onscreen) {
+            ((GLCapabilities)capabilities).setDoubleBuffered(false);
+        }
     
         X11GLXGraphicsConfiguration res;
         res = chooseGraphicsConfigurationFBConfig((GLCapabilities) capabilities,
                                                   (GLCapabilitiesChooser) chooser,
-                                                  x11Screen, usePBuffer);
+                                                  x11Screen);
         if(null==res) {
             if(usePBuffer) {
                 throw new GLException("Error: Couldn't create X11GLXGraphicsConfiguration based on FBConfig");
@@ -164,8 +167,7 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
 
     protected static X11GLXGraphicsConfiguration chooseGraphicsConfigurationFBConfig(GLCapabilities capabilities,
                                                                                      GLCapabilitiesChooser chooser,
-                                                                                     X11GraphicsScreen x11Screen,
-                                                                                     boolean usePBuffer) {
+                                                                                     X11GraphicsScreen x11Screen) {
         int recommendedIndex = -1;
         GLCapabilities[] caps = null;
         PointerBuffer fbcfgsL = null;
@@ -173,6 +175,8 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
         int retFBID=-1;
         XVisualInfo retXVisualInfo = null;
         GLProfile glProfile = capabilities.getGLProfile();
+        boolean onscreen = capabilities.isOnscreen();
+        boolean usePBuffer = capabilities.isPBuffer();
 
         // Utilizing FBConfig
         //
@@ -182,7 +186,7 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
             AbstractGraphicsDevice absDevice = x11Screen.getDevice();
             long display = absDevice.getHandle();
             boolean isMultisampleAvailable = GLXUtil.isMultisampleAvailable(display);
-            int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capabilities, true, isMultisampleAvailable, usePBuffer, 0, 0);
+            int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capabilities, true, isMultisampleAvailable, 0, 0);
             int[] count = { -1 };
 
             fbcfgsL = GLX.glXChooseFBConfigCopied(display, screen, attribs, 0, count, 0);
@@ -192,10 +196,17 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
                 }
                 return null;
             }
+            if( !X11GLXGraphicsConfiguration.GLXFBConfigValid( display, fbcfgsL.get(0) ) ) {
+                if(DEBUG) {
+                    System.err.println("X11GLXGraphicsConfiguration.chooseGraphicsConfigurationFBConfig: GLX FBConfig invalid: ("+x11Screen+","+capabilities+"): "+fbcfgsL+", fbcfg: 0x"+Long.toHexString(fbcfgsL.get(0)));
+                }
+                return null;
+            }
             recommendedIndex = 0; // 1st match is always recommended ..
             caps = new GLCapabilities[fbcfgsL.limit()];
             for (int i = 0; i < fbcfgsL.limit(); i++) {
-                caps[i] = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glProfile, display, fbcfgsL.get(i), isMultisampleAvailable);
+                caps[i] = X11GLXGraphicsConfiguration.GLXFBConfig2GLCapabilities(glProfile, display, fbcfgsL.get(i), 
+                                                                                 false, onscreen, usePBuffer, isMultisampleAvailable);
             }
 
             if(null==chooser) {
@@ -212,8 +223,7 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
                 throw new GLException("GLCapabilitiesChooser specified invalid index (expected 0.." + (caps.length - 1) + ")");
             }
 
-            int[] tmpID = new int[1];
-            retFBID = X11GLXGraphicsConfiguration.glXGetFBConfig(display, fbcfgsL.get(chosen), GLX.GLX_FBCONFIG_ID, tmpID, 0);
+            retFBID = X11GLXGraphicsConfiguration.glXFBConfig2FBConfigID(display, fbcfgsL.get(chosen));
 
             retXVisualInfo = GLX.glXGetVisualFromFBConfigCopied(display, fbcfgsL.get(chosen));
             if (retXVisualInfo==null) {
@@ -241,6 +251,7 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
         // system's selection to the chooser as a hint
 
         GLProfile glProfile = capabilities.getGLProfile();
+        boolean onscreen = capabilities.isOnscreen();
         GLCapabilities[] caps = null;
         int recommendedIndex = -1;
         XVisualInfo retXVisualInfo = null;
@@ -252,7 +263,7 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
             AbstractGraphicsDevice absDevice = x11Screen.getDevice();
             long display = absDevice.getHandle();
             boolean isMultisampleAvailable = GLXUtil.isMultisampleAvailable(display);
-            int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capabilities, false, isMultisampleAvailable, false, 0, 0);
+            int[] attribs = X11GLXGraphicsConfiguration.GLCapabilities2AttribList(capabilities, false, isMultisampleAvailable, 0, 0);
             XVisualInfo[] infos = null;
 
             XVisualInfo recommendedVis = GLX.glXChooseVisualCopied(display, screen, attribs, 0);
@@ -273,7 +284,7 @@ public class X11GLXGraphicsConfigurationFactory extends GraphicsConfigurationFac
             }
             caps = new GLCapabilities[infos.length];
             for (int i = 0; i < infos.length; i++) {
-                caps[i] = X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(glProfile, display, infos[i], isMultisampleAvailable);
+                caps[i] = X11GLXGraphicsConfiguration.XVisualInfo2GLCapabilities(glProfile, display, infos[i], onscreen, false, isMultisampleAvailable);
                 // Attempt to find the visual chosen by glXChooseVisual
                 if (recommendedVis != null && recommendedVis.visualid() == infos[i].visualid()) {
                     recommendedIndex = i;
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXContext.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXContext.java
index c6d787f2b..7a38f0ce1 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXContext.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXContext.java
@@ -58,7 +58,8 @@ public class X11OffscreenGLXContext extends X11GLXContext {
   }
   
   public int getOffscreenContextReadBuffer() {
-    if (drawable.isDoubleBuffered()) {
+    GLCapabilities caps = (GLCapabilities)drawable.getNativeWindow().getGraphicsConfiguration().getNativeGraphicsConfiguration().getChosenCapabilities();
+    if (caps.getDoubleBuffered()) {
       return GL.GL_BACK;
     }
     return GL.GL_FRONT;
@@ -70,15 +71,6 @@ public class X11OffscreenGLXContext extends X11GLXContext {
     return true;
   }
 
-  protected int makeCurrentImpl() throws GLException {
-    getDrawableImpl().getFactoryImpl().lockToolkit();
-    try {
-      return super.makeCurrentImpl();
-    } finally {
-      getDrawableImpl().getFactoryImpl().unlockToolkit();
-    }
-  }
-
   protected void create() {
     createContext(false);
   }
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXDrawable.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXDrawable.java
index 69ecc34d2..51938df5f 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OffscreenGLXDrawable.java
@@ -47,14 +47,13 @@ import com.sun.nativewindow.impl.x11.*;
 
 public class X11OffscreenGLXDrawable extends X11GLXDrawable {
   private long pixmap;
-  private boolean isDoubleBuffered;
 
   protected X11OffscreenGLXDrawable(GLDrawableFactory factory, AbstractGraphicsScreen screen,
                                     GLCapabilities caps,
                                     GLCapabilitiesChooser chooser,
                                     int width,
                                     int height) {
-    super(factory, new NullWindow(X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(caps, chooser, screen, false)), true);
+    super(factory, new NullWindow(X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(caps, chooser, screen, false, false)), true);
     ((NullWindow) getNativeWindow()).setSize(width, height);
     create();
   }
@@ -87,7 +86,6 @@ public class X11OffscreenGLXDrawable extends X11GLXDrawable {
         throw new GLException("glXCreateGLXPixmap failed");
       }
       nw.setSurfaceHandle(drawable);
-      isDoubleBuffered = (X11GLXGraphicsConfiguration.glXGetConfig(dpy, vis, GLX.GLX_DOUBLEBUFFER, new int[1], 0) != 0);
       if (DEBUG) {
         System.err.println("Created pixmap " + toHexString(pixmap) +
                            ", GLXPixmap " + toHexString(drawable) +
@@ -135,8 +133,6 @@ public class X11OffscreenGLXDrawable extends X11GLXDrawable {
       getFactoryImpl().unlockToolkit();
     }
   }
-
-  public boolean isDoubleBuffered() {
-    return isDoubleBuffered;
+  public void swapBuffers() throws GLException {
   }
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OnscreenGLXDrawable.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OnscreenGLXDrawable.java
index d80a833f5..4a81448fd 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OnscreenGLXDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11OnscreenGLXDrawable.java
@@ -61,23 +61,4 @@ public class X11OnscreenGLXDrawable extends X11GLXDrawable {
     return component.getHeight();
   }
 
-  public void swapBuffers() throws GLException {
-    boolean didLock = false;
-    try {
-      if ( !isSurfaceLocked() ) {
-          // Usually the surface shall be locked within [makeCurrent .. swap .. release]
-          if (lockSurface() == NativeWindow.LOCK_SURFACE_NOT_READY) {
-              return;
-          }
-          didLock=true;
-      }
-
-      GLX.glXSwapBuffers(component.getDisplayHandle(), component.getSurfaceHandle());
-
-    } finally {
-      if(didLock) {
-          unlockSurface();
-      }
-    }
-  }
 }
diff --git a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11PbufferGLXDrawable.java b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11PbufferGLXDrawable.java
index 753e9d884..eecd92a53 100644
--- a/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11PbufferGLXDrawable.java
+++ b/src/jogl/classes/com/sun/opengl/impl/x11/glx/X11PbufferGLXDrawable.java
@@ -51,7 +51,7 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
                                   GLCapabilities caps, 
                                   GLCapabilitiesChooser chooser,
                                   int width, int height) {
-    super(factory, new NullWindow(X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(caps, chooser, screen, true)), true);
+    super(factory, new NullWindow(X11GLXGraphicsConfigurationFactory.chooseGraphicsConfigurationStatic(caps, chooser, screen, false, true)), true);
     if (width <= 0 || height <= 0) {
       throw new GLException("Width and height of pbuffer must be positive (were (" +
 			    width + ", " + height + "))");
@@ -147,4 +147,7 @@ public class X11PbufferGLXDrawable extends X11GLXDrawable {
     // Floating-point pbuffers currently require NVidia hardware on X11
     return GLPbuffer.NV_FLOAT;
   }
+
+  public void swapBuffers() throws GLException {
+  }
 }
diff --git a/src/jogl/classes/com/sun/opengl/util/FBObject.java b/src/jogl/classes/com/sun/opengl/util/FBObject.java
index c308f430f..84b79dff4 100755
--- a/src/jogl/classes/com/sun/opengl/util/FBObject.java
+++ b/src/jogl/classes/com/sun/opengl/util/FBObject.java
@@ -50,15 +50,8 @@ public class FBObject {
     }        
 
 
-    public boolean validateStatus(GL gl)
-    {
-        if(!gl.glIsFramebuffer(fb)) {
-            vStatus=-1;
-            return false;
-        }
-        vStatus=gl.glCheckFramebufferStatus(gl.GL_FRAMEBUFFER);
-        //vStatus=gl.glCheckFramebufferStatus(fb);
-
+    public boolean validateStatus(GL gl) {
+        vStatus = getStatus(gl, fb);
         switch(vStatus) {
             case GL.GL_FRAMEBUFFER_COMPLETE:
                 return true;
@@ -76,9 +69,20 @@ public class FBObject {
         }
     }
 
-    public String getStatusString()
-    {
-        switch(vStatus) {
+    public static int getStatus(GL gl, int fb) {
+        if(!gl.glIsFramebuffer(fb)) {
+            return -1;
+        }
+        return gl.glCheckFramebufferStatus(gl.GL_FRAMEBUFFER);
+        //return gl.glCheckFramebufferStatus(fb);
+    }
+
+    public String getStatusString() {
+        return getStatusString(vStatus);
+    }
+
+    public static String getStatusString(int fbStatus) {
+        switch(fbStatus) {
             case -1:
                 return "NOT A FBO";
             case GL.GL_FRAMEBUFFER_COMPLETE:
diff --git a/src/jogl/classes/javax/media/opengl/DefaultGLCapabilitiesChooser.java b/src/jogl/classes/javax/media/opengl/DefaultGLCapabilitiesChooser.java
index 782d041a5..cc7afaa95 100644
--- a/src/jogl/classes/javax/media/opengl/DefaultGLCapabilitiesChooser.java
+++ b/src/jogl/classes/javax/media/opengl/DefaultGLCapabilitiesChooser.java
@@ -81,7 +81,7 @@ import javax.media.nativewindow.NativeWindowException;
 */
 
 public class DefaultGLCapabilitiesChooser implements GLCapabilitiesChooser {
-  private static final boolean DEBUG = false; // FIXME: Debug.debug("DefaultGLCapabilitiesChooser");
+  private static final boolean DEBUG = true; // FIXME: Debug.debug("DefaultGLCapabilitiesChooser");
 
   public int chooseCapabilities(Capabilities desired,
                                 Capabilities[] available,
@@ -128,6 +128,9 @@ public class DefaultGLCapabilitiesChooser implements GLCapabilitiesChooser {
       if (cur == null) {
         continue;
       }
+      if (_desired.isOnscreen() != cur.isOnscreen()) {
+        continue;
+      }
       if (_desired.getStereo() != cur.getStereo()) {
         continue;
       }
diff --git a/src/jogl/classes/javax/media/opengl/GLCapabilities.java b/src/jogl/classes/javax/media/opengl/GLCapabilities.java
index 37e35d4f0..530078ec0 100644
--- a/src/jogl/classes/javax/media/opengl/GLCapabilities.java
+++ b/src/jogl/classes/javax/media/opengl/GLCapabilities.java
@@ -54,6 +54,7 @@ import javax.media.nativewindow.Capabilities;
     configuration on all supported window systems. */
 public class GLCapabilities extends Capabilities implements Cloneable {
   private GLProfile glProfile = null;
+  private boolean pbuffer = false;
   private boolean doubleBuffered = true;
   private boolean stereo         = false;
   private boolean hardwareAccelerated = true;
@@ -97,7 +98,7 @@ public class GLCapabilities extends Capabilities implements Cloneable {
     GLCapabilities other = (GLCapabilities)obj;
     boolean res = super.equals(obj) &&
                   other.getGLProfile()==glProfile &&
-                  other.getDoubleBuffered()==doubleBuffered &&
+                  other.isPBuffer()==pbuffer &&
                   other.getStereo()==stereo &&
                   other.getHardwareAccelerated()==hardwareAccelerated &&
                   other.getDepthBits()==depthBits &&
@@ -126,6 +127,16 @@ public class GLCapabilities extends Capabilities implements Cloneable {
     glProfile=profile;
   }
 
+  /** Indicates whether pbuffer is used/requested. */
+  public boolean isPBuffer() {
+    return pbuffer;
+  }
+
+  /** Enables or disables pbuffer usage. */
+  public void setPBuffer(boolean onOrOff) {
+    pbuffer = onOrOff;
+  }
+
   /** Indicates whether double-buffering is enabled. */
   public boolean getDoubleBuffered() {
     return doubleBuffered;
@@ -310,6 +321,7 @@ public class GLCapabilities extends Capabilities implements Cloneable {
     msg.append("GLCapabilities[");
     msg.append(super.toString());
     msg.append(", GL profile: " + glProfile +
+        ", PBuffer: " + pbuffer +
         ", DoubleBuffered: " + doubleBuffered +
 	    ", Stereo: " + stereo + 
         ", HardwareAccelerated: " + hardwareAccelerated +
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
index 74da59cd3..dd2a487e7 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
@@ -52,6 +52,7 @@ import java.nio.*;
 import java.security.*;
 import javax.swing.JComponent;
 import javax.swing.JPanel;
+import com.sun.opengl.util.FBObject;
 import com.sun.opengl.impl.*;
 import com.sun.opengl.impl.awt.*;
 
@@ -173,6 +174,9 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
       textures, display lists and other OpenGL state, and may be null
       if sharing is not desired. See the note in the overview documentation on
       <a href="../../../overview-summary.html#SHARING">context sharing</a>.
+      <P>
+      Note: Sharing cannot be enabled using J2D OpenGL FBO sharing,
+      since J2D GL Context must be shared and we can only share one context.
   */
   public GLJPanel(GLCapabilities capabilities, GLCapabilitiesChooser chooser, GLContext shareWith) {
     super();
@@ -561,8 +565,8 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
         return;
       }
       if (sendReshape) {
-        if (DEBUG) {
-          System.err.println("glViewport(" + viewportX + ", " + viewportY + ", " + panelWidth + ", " + panelHeight + ")");
+        if (DEBUG||VERBOSE) {
+          System.err.println("display: glViewport(" + viewportX + "," + viewportY + " " + panelWidth + "x" + panelHeight + ")");
         }
         getGL().getGL2().glViewport(viewportX, viewportY, panelWidth, panelHeight);
         drawableHelper.reshape(GLJPanel.this, viewportX, viewportY, panelWidth, panelHeight);
@@ -1268,9 +1272,6 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
       // allow us to bind to this object since it's in our namespace.
       if (Java2D.isFBOEnabled() &&
           Java2D.getOGLSurfaceType(g) == Java2D.FBOBJECT) {
-        if (DEBUG && VERBOSE) {
-          System.err.println("GLJPanel: Binding to framebuffer object " + frameBuffer[0]);
-        }
 
         // The texture target for Java2D's OpenGL pipeline when using FBOs
         // -- either GL_TEXTURE_2D or GL_TEXTURE_RECTANGLE_ARB
@@ -1280,17 +1281,21 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
           checkedForFBObjectWorkarounds = true;
           gl.glBindTexture(fboTextureTarget, 0);
           gl.glBindFramebuffer(GL2.GL_FRAMEBUFFER, frameBuffer[0]);
-          if (gl.glCheckFramebufferStatus(GL2.GL_FRAMEBUFFER) !=
-              GL2.GL_FRAMEBUFFER_COMPLETE) {
-            // Need to do workarounds
-            fbObjectWorkarounds = true;
-            createNewDepthBuffer = true;
-            if (DEBUG) {
-              System.err.println("-- GLJPanel: discovered frame_buffer_object workarounds to be necessary");
-            }
+          int status = gl.glCheckFramebufferStatus(GL.GL_FRAMEBUFFER);
+          if (status != GL.GL_FRAMEBUFFER_COMPLETE) {
+              // Need to do workarounds
+              fbObjectWorkarounds = true;
+              createNewDepthBuffer = true;
+              if (DEBUG || VERBOSE) {
+                  System.err.println("GLJPanel: ERR GL_FRAMEBUFFER_BINDING: Discovered Invalid J2D FBO("+frameBuffer[0]+"): "+FBObject.getStatusString(status) +
+                                     ", frame_buffer_object workarounds to be necessary");
+              }
           } else {
             // Don't need the frameBufferTexture temporary any more
             frameBufferTexture = null;
+            if (DEBUG || VERBOSE) {
+              System.err.println("GLJPanel: OK GL_FRAMEBUFFER_BINDING: "+frameBuffer[0]);
+            }
           }
         }
 
@@ -1330,23 +1335,23 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
 
         if (fbObjectWorkarounds) {
           // Hook up the color and depth buffer attachment points for this framebuffer
-          gl.glFramebufferTexture2D(GL2.GL_FRAMEBUFFER,
-                                    GL2.GL_COLOR_ATTACHMENT0,
+          gl.glFramebufferTexture2D(GL.GL_FRAMEBUFFER,
+                                    GL.GL_COLOR_ATTACHMENT0,
                                     fboTextureTarget,
                                     frameBufferTexture[0],
                                     0);
           if (DEBUG && VERBOSE) {
             System.err.println("GLJPanel: frameBufferDepthBuffer: " + frameBufferDepthBuffer[0]);
           }
-          gl.glFramebufferRenderbuffer(GL2.GL_FRAMEBUFFER,
-                                       GL2.GL_DEPTH_ATTACHMENT,
-                                       GL2.GL_RENDERBUFFER,
+          gl.glFramebufferRenderbuffer(GL.GL_FRAMEBUFFER,
+                                       GL.GL_DEPTH_ATTACHMENT,
+                                       GL.GL_RENDERBUFFER,
                                        frameBufferDepthBuffer[0]);
         }
 
         if (DEBUG) {
-          int status = gl.glCheckFramebufferStatus(GL2.GL_FRAMEBUFFER);
-          if (status != GL2.GL_FRAMEBUFFER_COMPLETE) {
+          int status = gl.glCheckFramebufferStatus(GL.GL_FRAMEBUFFER);
+          if (status != GL.GL_FRAMEBUFFER_COMPLETE) {
             throw new GLException("Error: framebuffer was incomplete: status = 0x" +
                                   Integer.toHexString(status));
           }
@@ -1417,6 +1422,9 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
             // Create no-op context representing Java2D context
             if (j2dContext == null) {
               j2dContext = factory.createExternalGLContext();
+              if (DEBUG||VERBOSE) {
+                System.err.println("-- Created External Context: "+j2dContext);
+              }
               if (DEBUG) {
                 j2dContext.setGL(new DebugGL2(j2dContext.getGL().getGL2()));
               }
@@ -1474,20 +1482,50 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
                     joglContext = null;
                     joglDrawable = null;
                     sendReshape = true;
-                    if (DEBUG) {
+                    if (DEBUG||VERBOSE) {
                       System.err.println("Sending reshape because surface changed");
                       System.err.println("New surface = " + curSurface);
                     }
                   }
                   j2dSurface = curSurface;
+                  if (DEBUG || VERBOSE) {
+                      System.err.print("-- Surface type: ");
+                      int surfaceType = Java2D.getOGLSurfaceType(g);
+                      if (surfaceType == Java2D.UNDEFINED) {
+                        System.err.println("UNDEFINED");
+                      } else if (surfaceType == Java2D.WINDOW) {
+                        System.err.println("WINDOW");
+                      } else if (surfaceType == Java2D.PBUFFER) {
+                        System.err.println("PBUFFER");
+                      } else if (surfaceType == Java2D.TEXTURE) {
+                        System.err.println("TEXTURE");
+                      } else if (surfaceType == Java2D.FLIP_BACKBUFFER) {
+                        System.err.println("FLIP_BACKBUFFER");
+                      } else if (surfaceType == Java2D.FBOBJECT) {
+                        System.err.println("FBOBJECT");
+                      } else {
+                        System.err.println("(Unknown surface type " + surfaceType + ")");
+                      }
+                  }
                 }
                 if (joglContext == null) {
                   if (factory.canCreateExternalGLDrawable()) {
                     joglDrawable = factory.createExternalGLDrawable();
-                    joglContext = joglDrawable.createContext(shareWith);
+                    // FIXME: Need to share with j2d context, due to FBO resource .. 
+                    // - ORIG: joglContext = joglDrawable.createContext(shareWith);
+                    joglContext = joglDrawable.createContext(j2dContext);
+                    if (DEBUG||VERBOSE) {
+                        System.err.println("-- Created External Drawable: "+joglDrawable);
+                        System.err.println("-- Created Context: "+joglContext);
+                    }
                   } else if (factory.canCreateContextOnJava2DSurface()) {
                     // Mac OS X code path
-                    joglContext = factory.createContextOnJava2DSurface(g, shareWith);
+                    // FIXME: Need to share with j2d context, due to FBO resource .. 
+                    // - ORIG: joglContext = factory.createContextOnJava2DSurface(g, shareWith);
+                    joglContext = factory.createContextOnJava2DSurface(g, j2dContext);
+                    if (DEBUG||VERBOSE) {
+                        System.err.println("-- Created Context: "+joglContext);
+                    }
                   }
                   if (DEBUG) {
                     joglContext.setGL(new DebugGL2(joglContext.getGL().getGL2()));
@@ -1504,26 +1542,6 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
                   ((Java2DGLContext) joglContext).setGraphics(g);
                 }
 
-                if (DEBUG && VERBOSE && Java2D.isFBOEnabled()) {
-                  System.err.print("-- Surface type: ");
-                  int surfaceType = Java2D.getOGLSurfaceType(g);
-                  if (surfaceType == Java2D.UNDEFINED) {
-                    System.err.println("UNDEFINED");
-                  } else if (surfaceType == Java2D.WINDOW) {
-                    System.err.println("WINDOW");
-                  } else if (surfaceType == Java2D.PBUFFER) {
-                    System.err.println("PBUFFER");
-                  } else if (surfaceType == Java2D.TEXTURE) {
-                    System.err.println("TEXTURE");
-                  } else if (surfaceType == Java2D.FLIP_BACKBUFFER) {
-                    System.err.println("FLIP_BACKBUFFER");
-                  } else if (surfaceType == Java2D.FBOBJECT) {
-                    System.err.println("FBOBJECT");
-                  } else {
-                    System.err.println("(Unknown surface type " + surfaceType + ")");
-                  }
-                }
-
                 drawableHelper.invokeGL(joglDrawable, joglContext, displayAction, initAction);
               }
             } finally {
@@ -1538,26 +1556,33 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
       gl.glGetIntegerv(GL2.GL_READ_BUFFER, readBuffer, 0);
       if (Java2D.isFBOEnabled() &&
           Java2D.getOGLSurfaceType(g) == Java2D.FBOBJECT) {
-        if (DEBUG && VERBOSE) {
-          System.err.println("GLJPanel: Fetching GL_FRAMEBUFFER_BINDING_EXT");
-        }
-        gl.glGetIntegerv(GL2.GL_FRAMEBUFFER_BINDING, frameBuffer, 0);
-
-        if (fbObjectWorkarounds ||
-            !checkedForFBObjectWorkarounds) {
-          // See above for description of what we are doing here
-          if (frameBufferTexture == null)
-            frameBufferTexture = new int[1];
-
-          // Query the framebuffer for its color buffer so we can hook
-          // it back up in our context (should not be necessary)
-          gl.glGetFramebufferAttachmentParameteriv(GL2.GL_FRAMEBUFFER,
-                                                   GL2.GL_COLOR_ATTACHMENT0,
-                                                   GL2.GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
-                                                   frameBufferTexture, 0);
-          if (DEBUG && VERBOSE) {
-            System.err.println("GLJPanel: FBO COLOR_ATTACHMENT0: " + frameBufferTexture[0]);
+        gl.glGetIntegerv(GL.GL_FRAMEBUFFER_BINDING, frameBuffer, 0);
+        if(!gl.glIsFramebuffer(frameBuffer[0])) {
+          checkedForFBObjectWorkarounds=true;
+          fbObjectWorkarounds = true;
+          createNewDepthBuffer = true;
+          if (DEBUG || VERBOSE) {
+              System.err.println("GLJPanel: Fetched ERR GL_FRAMEBUFFER_BINDING: "+frameBuffer[0]+" - NOT A FBO"+
+                                 ", frame_buffer_object workarounds to be necessary");
           }
+        } else if (DEBUG) {
+          System.err.println("GLJPanel: Fetched OK GL_FRAMEBUFFER_BINDING: "+frameBuffer[0]);
+        }
+
+        if(fbObjectWorkarounds || !checkedForFBObjectWorkarounds) {
+            // See above for description of what we are doing here
+            if (frameBufferTexture == null)
+                frameBufferTexture = new int[1];
+
+            // Query the framebuffer for its color buffer so we can hook
+            // it back up in our context (should not be necessary)
+            gl.glGetFramebufferAttachmentParameteriv(GL.GL_FRAMEBUFFER,
+                                                     GL.GL_COLOR_ATTACHMENT0,
+                                                     GL.GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME,
+                                                     frameBufferTexture, 0);
+            if (DEBUG && VERBOSE) {
+                System.err.println("GLJPanel: FBO COLOR_ATTACHMENT0: " + frameBufferTexture[0]);
+            }
         }
 
         if (!checkedGLVendor) {
@@ -1576,7 +1601,7 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
           // simultaneously bound to more than one context. Java2D will
           // re-bind the FBO during the next validation of its context.
           // Note: this breaks rendering at least on NVidia hardware
-          gl.glBindFramebuffer(GL2.GL_FRAMEBUFFER, 0);
+          gl.glBindFramebuffer(GL.GL_FRAMEBUFFER, 0);
         }
       }
     }
diff --git a/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java b/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java
index 46128b227..c7d2acec0 100644
--- a/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java
+++ b/src/nativewindow/classes/com/sun/nativewindow/impl/NullWindow.java
@@ -44,7 +44,6 @@ public class NullWindow implements NativeWindow {
   protected long surfaceHandle, displayHandle;
   protected AbstractGraphicsConfiguration config;
 
-
   public NullWindow(AbstractGraphicsConfiguration cfg) {
     invalidate();
     config = cfg;
@@ -128,4 +127,12 @@ public class NullWindow implements NativeWindow {
   public int getHeight() {
     return height;
   }
+
+  public String toString() {
+    return "NullWindow[config "+config+
+                ", displayHandle 0x"+Long.toHexString(getDisplayHandle())+
+                ", surfaceHandle 0x"+Long.toHexString(getSurfaceHandle())+
+                ", size "+getWidth()+"x"+getHeight()+"]";
+  }
+
 }
diff --git a/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTUtil.java b/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTUtil.java
index af93b8c31..aac01e990 100644
--- a/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTUtil.java
+++ b/src/nativewindow/classes/com/sun/nativewindow/impl/jawt/JAWTUtil.java
@@ -41,19 +41,39 @@ import com.sun.nativewindow.impl.*;
 import javax.media.nativewindow.*;
 
 import java.awt.GraphicsEnvironment;
+import java.lang.reflect.*;
 
 public class JAWTUtil {
 
+  // See whether we're running in headless mode
+  private static final boolean headlessMode;
+
+  // Java2D magic ..
+  private static final Class j2dClazz;
+  private static final Method isQueueFlusherThread;
+  private static final boolean j2dExist;
+
   static {
     JAWTNativeLibLoader.loadAWTImpl();
     JAWTNativeLibLoader.loadNativeWindow("awt");
 
     lockedStack   = null;
     headlessMode = GraphicsEnvironment.isHeadless();
-  }
 
-  // See whether we're running in headless mode
-  private static final boolean headlessMode;
+    boolean ok=false;
+    Class jC=null;
+    Method m=null;
+    if(!headlessMode) {
+        try {
+            jC = Class.forName("com.sun.opengl.impl.awt.Java2D");
+            m = jC.getMethod("isQueueFlusherThread", null);
+            ok = true;
+        } catch (Exception e) {}
+    }
+    j2dClazz = jC;
+    isQueueFlusherThread = m;
+    j2dExist = ok;
+  }
 
   private static Exception lockedStack;
 
@@ -61,11 +81,27 @@ public class JAWTUtil {
   // ie loading the native libraries ..
   public static void init() { }
 
+  public static final boolean hasJava2D() {
+    return j2dExist;
+  }
+
+  public static final boolean isJava2DQueueFlusherThread() {
+    boolean b = false;
+    if(j2dExist) {
+        try {
+            b = ((Boolean)isQueueFlusherThread.invoke(null, null)).booleanValue();
+        } catch (Exception e) {}
+    }
+    return b;
+  }
+
   public static boolean isHeadlessMode() {
     return headlessMode;
   }
 
   public static synchronized void lockToolkit() throws NativeWindowException {
+    if (isJava2DQueueFlusherThread()) return;
+
     if (null!=lockedStack) {
       lockedStack.printStackTrace();
       throw new NativeWindowException("JAWT Toolkit already locked - "+Thread.currentThread().getName());
@@ -83,6 +119,8 @@ public class JAWTUtil {
   }
 
   public static synchronized void unlockToolkit() {
+    if (isJava2DQueueFlusherThread()) return;
+
     if (null!=lockedStack) {
         lockedStack = null;
         if (headlessMode) {
diff --git a/src/nativewindow/classes/javax/media/nativewindow/Capabilities.java b/src/nativewindow/classes/javax/media/nativewindow/Capabilities.java
index 6c4c93003..9df57b6d2 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/Capabilities.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/Capabilities.java
@@ -57,6 +57,9 @@ public class Capabilities implements Cloneable {
   private int     transparentValueBlue = -1;
   private int     transparentValueAlpha = -1;
 
+  // Switch for on- or offscreen
+  private boolean onscreen  = true;
+
   /** Creates a Capabilities object. All attributes are in a default
       state.
     */
@@ -79,7 +82,8 @@ public class Capabilities implements Cloneable {
                   other.getGreenBits()==greenBits &&
                   other.getBlueBits()==blueBits &&
                   other.getAlphaBits()==alphaBits &&
-                  other.isBackgroundOpaque()==backgroundOpaque;
+                  other.isBackgroundOpaque()==backgroundOpaque &&
+                  other.isOnscreen()==onscreen;
     if(!backgroundOpaque) {
      res = res && other.getTransparentRedValue()==transparentValueRed &&
                   other.getTransparentGreenValue()==transparentValueGreen &&
@@ -184,6 +188,20 @@ public class Capabilities implements Cloneable {
     return backgroundOpaque;
   }
 
+  /** Sets whether the drawable surface supports onscreen.
+      Defaults to true.
+  */
+  public void setOnscreen(boolean onscreen) {
+    this.onscreen=onscreen;
+  }
+
+  /** Indicates whether the drawable surface is onscreen.
+      Defaults to true.
+  */
+  public boolean isOnscreen() {
+    return onscreen;
+  }
+
   /** Gets the transparent red value for the frame buffer configuration.
     * This value is undefined if {@link #isBackgroundOpaque()} equals true.
     * @see #setTransparentRedValue
@@ -242,7 +260,8 @@ public class Capabilities implements Cloneable {
   public String toString() {
     StringBuffer msg = new StringBuffer();
     msg.append("Capabilities[");
-	msg.append("Red: " + redBits +
+	msg.append("Onscreen: "+ onscreen +
+        ", Red: " + redBits +
 	    ", Green: " + greenBits +
 	    ", Blue: " + blueBits +
 	    ", Alpha: " + alphaBits +
diff --git a/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java b/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java
index eb0c25aed..cbd485649 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/NativeWindowFactory.java
@@ -129,7 +129,8 @@ public abstract class NativeWindowFactory {
         }
 
         boolean toolkitLockForced   = Debug.getBooleanProperty("nativewindow.locking", true, acc);
-        boolean awtToolkitLockDisabled = Debug.getBooleanProperty("java.awt.headless", false, acc);
+        boolean awtToolkitLockDisabled = Debug.getBooleanProperty("java.awt.headless", false, acc) ||
+                                         Debug.getBooleanProperty("nativewindow.nolocking", true, acc) ;
 
         NativeWindowFactory _factory = null;
         
@@ -166,13 +167,6 @@ public abstract class NativeWindowFactory {
             // primitives in its OpenGL window system binding) makes
             // the JOGL library more powerful.
             // 
-            // (FIXME: from code examination, it looks like there are
-            // regressions in the support for external GLDrawables in
-            // JOGL 2 compared to JOGL 1.1.1. Note that the "default"
-            // X display connection from X11Util is being used during
-            // construction of the X11ExternalGLXDrawable instead of
-            // the result of glXGetCurrentDisplay().)
-            //
             // The X11AWTNativeWindowFactory provides a locking
             // mechanism compatible with the AWT. It may be desirable
             // to replace this window factory when using third-party
diff --git a/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsDevice.java b/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsDevice.java
index 911b8f416..f0ea11011 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsDevice.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsDevice.java
@@ -34,8 +34,6 @@ package javax.media.nativewindow.x11;
 
 import javax.media.nativewindow.*;
 
-import com.sun.nativewindow.impl.x11.*;
-
 /** Encapsulates a graphics device on X11 platforms.
  */
 
diff --git a/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java b/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java
index 45146d33e..360036563 100644
--- a/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java
+++ b/src/nativewindow/classes/javax/media/nativewindow/x11/X11GraphicsScreen.java
@@ -33,8 +33,8 @@
 package javax.media.nativewindow.x11;
 
 import javax.media.nativewindow.*;
-
-import com.sun.nativewindow.impl.x11.*;
+import com.sun.nativewindow.impl.x11.X11Util;
+import com.sun.nativewindow.impl.x11.X11Lib;
 
 /** Encapsulates a screen index on X11
     platforms. Objects of this type are passed to {@link