OS X Layered View Part8: Generalize OffscreenLayerSurface ; Use local JAWT instance ; Applet's on OS X are working

Generalize OffscreenLayerSurface
  - Using new OffscreenLayerSurface allows using this functionality in a clean manner,
    ie. no 'dirty' usage of MacOSXJAWTWindow in a JOGL GL class.

  - 'Promoting' OffscreenLayerSurface functionality to JAWTWindow
    and it's handling to GLDrawableFactoryImpl::createGLDrawable().

  - Move MacOSXCGLDrawableFactory's "MacOSXJAWTWindow getLayeredSurfaceHost(NativeSurface surface)"
    to NativeWindowFactory "OffscreenLayerSurface getOffscreenLayerSurface(NativeSurface surface, boolean ifEnabled)"

Use local JAWT instance
  - Only w/ a local JAWT instance per JAWTWindow it is possible to switch between
    offscreen-layer and onscreen. We also have to determing offscreen-layer lazy
    at surface lock, since only at that time we have knowledge whether it's an Applet
    or not.

+++

ContextUpdater:
  Use local pthread mutex, add DEBUG output

JAWTWindow/NewtCanvasAWT:
  Adding methods to request offscreen-layer-surface (if supported),
  besides 'if applet' this may trigger the new functionality.

+++

Applet's on OS X are working:
  - OS X 10.6.4
    - Safari:
      - Hangs for a while at start .. whole screen freezes .. approx. 10s
      - Sometimes crashes when Applet stops - after all our resources are released!
      - Keyboard input isn't assigned sometimes.
      - Otherwise .. works well, incl. offscreen/onscreen parenting

    - Firefox 8.0:
      - Hangs for a while at start .. whole screen freezes .. approx. 10s
      - Sometimes crashes when Applet stops - after all our resources are released!
      - Keyboard input is never assigned.
      - Otherwise .. works well, incl. offscreen/onscreen parenting

  - OS X 10.7
    - Safari:
      - Sometimes crashes when Applet stops - after all our resources are released!
      - Keyboard input isn't assigned sometimes.
      - Otherwise .. works well, incl. offscreen/onscreen parenting

    - Firefox 8.0:
      - Sometimes crashes when Applet stops - after all our resources are released!
      - Keyboard input is never assigned.
      - Otherwise .. works well, incl. offscreen/onscreen parenting

8 files changed, 89 insertions, 156 deletions

diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
index 704f71457..4f0b11789 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
@@ -40,9 +40,26 @@
 
 package jogamp.opengl;
 
-import java.nio.*;
-import javax.media.nativewindow.*;
-import javax.media.opengl.*;
+import java.nio.Buffer;
+
+import javax.media.nativewindow.AbstractGraphicsDevice;
+import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowFactory;
+import javax.media.nativewindow.OffscreenLayerSurface;
+import javax.media.nativewindow.ProxySurface;
+import javax.media.nativewindow.SurfaceChangeable;
+import javax.media.opengl.GLCapabilities;
+import javax.media.opengl.GLCapabilitiesChooser;
+import javax.media.opengl.GLCapabilitiesImmutable;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawable;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.GLException;
+import javax.media.opengl.GLPbuffer;
+import javax.media.opengl.GLProfile;
+import javax.media.opengl.Threading;
+
+import jogamp.nativewindow.MutableGraphicsConfiguration;
 
 import com.jogamp.common.util.VersionNumber;
 
@@ -103,24 +120,43 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
     }
-    AbstractGraphicsConfiguration config = target.getGraphicsConfiguration().getNativeGraphicsConfiguration();
-    GLCapabilitiesImmutable caps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
+    final MutableGraphicsConfiguration config = (MutableGraphicsConfiguration) target.getGraphicsConfiguration().getNativeGraphicsConfiguration();
+    GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
     AbstractGraphicsDevice adevice = config.getScreen().getDevice();
     GLDrawable result = null;
     adevice.lock();
     try {
-        if(caps.isOnscreen()) {
-            if(DEBUG) {
-                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable: "+target);
+        if(chosenCaps.isOnscreen()) {
+            // onscreen
+            final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(target, true);
+            if(null == ols) {
+                // traditional onscreen
+                if(DEBUG) {
+                    System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable: "+target);
+                }
+                result = createOnscreenDrawableImpl(target);
+            } else {            
+                // layered surface -> offscreen/PBuffer
+                final GLCapabilities chosenCapsMod = (GLCapabilities) chosenCaps.cloneMutable();
+                chosenCapsMod.setOnscreen(false);
+                chosenCapsMod.setPBuffer(canCreateGLPbuffer(adevice));
+                config.setChosenCapabilities(chosenCapsMod);
+                if(DEBUG) {
+                    System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OnscreenDrawable -> Offscreen-Layer: "+target);
+                }
+                if( ! ( target instanceof SurfaceChangeable ) ) {
+                    throw new IllegalArgumentException("Passed NativeSurface must implement SurfaceChangeable for offscreen layered surface: "+target);
+                }
+                result = createOffscreenDrawableImpl(target);
             }
-            result = createOnscreenDrawableImpl(target);
         } else {
+            // offscreen
+            if(DEBUG) {
+                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OffScreenDrawable (PBuffer: "+chosenCaps.isPBuffer()+"): "+target);
+            }
             if( ! ( target instanceof SurfaceChangeable ) ) {
                 throw new IllegalArgumentException("Passed NativeSurface must implement SurfaceChangeable for offscreen: "+target);
             }
-            if(DEBUG) {
-                System.err.println("GLDrawableFactoryImpl.createGLDrawable -> OffScreenDrawable (PBuffer: "+caps.isPBuffer()+"): "+target);
-            }
             result = createOffscreenDrawableImpl(target);
         }
     } finally {
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
index b75d2f927..f5970fad9 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLContext.java
@@ -46,18 +46,18 @@ import java.util.Map;
 import javax.media.nativewindow.AbstractGraphicsConfiguration;
 import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.NativeSurface;
+import javax.media.nativewindow.NativeWindowFactory;
+import javax.media.nativewindow.OffscreenLayerSurface;
 import javax.media.opengl.GLCapabilitiesImmutable;
 import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
-import jogamp.nativewindow.jawt.macosx.MacOSXJAWTWindow;
 import jogamp.opengl.GLContextImpl;
 import jogamp.opengl.GLContextShareSet;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLGraphicsConfigurationUtil;
 import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.GLBackendType;
-import jogamp.opengl.macosx.cgl.MacOSXCGLDrawable.LayeredSurfaceType;
 
 import com.jogamp.common.nio.PointerBuffer;
 import com.jogamp.common.os.Platform;
@@ -407,7 +407,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
         final MacOSXCGLDrawable drawable = (MacOSXCGLDrawable) MacOSXCGLContext.this.drawable;
         final NativeSurface surface = drawable.getNativeSurface();
         final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) surface.getGraphicsConfiguration().getNativeGraphicsConfiguration();
-        final boolean isBackingLayerView = LayeredSurfaceType.None != drawable.getLayeredSurfaceType();
+        final OffscreenLayerSurface backingLayerHost = NativeWindowFactory.getOffscreenLayerSurface(surface, true);        
         final GLCapabilitiesImmutable chosenCaps = (GLCapabilitiesImmutable) config.getChosenCapabilities();
         long pixelFormat = MacOSXCGLGraphicsConfiguration.GLCapabilities2NSPixelFormat(chosenCaps, ctp, major, minor);
         if (pixelFormat == 0) {
@@ -416,7 +416,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
         config.setChosenPixelFormat(pixelFormat);
         if(DEBUG) {
             System.err.println("NS create OSX>=lion "+isLionOrLater);
-            System.err.println("NS create drawable layeredType: "+drawable.getLayeredSurfaceType()+", backingLayerView "+isBackingLayerView);
+            System.err.println("NS create backingLayerHost: "+backingLayerHost);
             System.err.println("NS create share: "+share);
             System.err.println("NS create chosenCaps: "+chosenCaps);
             System.err.println("NS create pixelFormat: "+toHexString(pixelFormat));
@@ -428,7 +428,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
           int[] viewNotReady = new int[1];
           // Try to allocate a context with this
           ctx = CGL.createContext(share,
-                                  drawable.getNSViewHandle(), isBackingLayerView,
+                                  drawable.getNSViewHandle(), null!=backingLayerHost,
                                   pixelFormat,
                                   chosenCaps.isBackgroundOpaque(),
                                   viewNotReady, 0);
@@ -459,16 +459,11 @@ public abstract class MacOSXCGLContext extends GLContextImpl
               CGL.setContextPBuffer(ctx, drawable.getHandle());
           }
           //
-          // handled layered surface (same path for direct and parented)
+          // handled layered surface
           // 
-          if(isBackingLayerView) {
-              final MacOSXJAWTWindow lsh = MacOSXCGLDrawableFactory.getLayeredSurfaceHost(surface);
+          if(null != backingLayerHost) {
               nsOpenGLLayerPFmt = pixelFormat;
               pixelFormat = 0;
-              /*
-                final long nsView = drawable.getNSViewHandle();
-                nsOpenGLLayer = CGL.createNSOpenGLLayer(ctx, nsOpenGLLayerPFmt, nsView, fixedCaps.isBackgroundOpaque());
-               */
               final int texWidth, texHeight;
               if(drawable instanceof MacOSXPbufferCGLDrawable) {
                   final MacOSXPbufferCGLDrawable osxPDrawable = (MacOSXPbufferCGLDrawable)drawable;
@@ -482,7 +477,7 @@ public abstract class MacOSXCGLContext extends GLContextImpl
               if (DEBUG) {
                   System.err.println("NS create nsOpenGLLayer "+toHexString(nsOpenGLLayer));
               }              
-              lsh.attachSurfaceLayer(nsOpenGLLayer);
+              backingLayerHost.attachSurfaceLayer(nsOpenGLLayer);
           }
         } finally {
           if(0!=pixelFormat) {
@@ -495,12 +490,15 @@ public abstract class MacOSXCGLContext extends GLContextImpl
     public boolean destroy(long ctx) {
       if(0 != nsOpenGLLayer) {
           final NativeSurface surface = drawable.getNativeSurface();
-          final MacOSXJAWTWindow lsh = MacOSXCGLDrawableFactory.getLayeredSurfaceHost(surface);
           if (DEBUG) {
               System.err.println("NS destroy nsOpenGLLayer "+toHexString(nsOpenGLLayer));
           }
+          final OffscreenLayerSurface ols = NativeWindowFactory.getOffscreenLayerSurface(surface, true);
+          if(null == ols) {
+              throw new InternalError("XXX: "+ols);
+          }
           CGL.releaseNSOpenGLLayer(nsOpenGLLayer);
-          lsh.detachSurfaceLayer(nsOpenGLLayer);
+          ols.detachSurfaceLayer(nsOpenGLLayer);
           CGL.deletePixelFormat(nsOpenGLLayerPFmt);
           nsOpenGLLayerPFmt = 0;
           nsOpenGLLayer = 0;
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
index 7ee0d4fbe..12d480fd1 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawable.java
@@ -49,7 +49,6 @@ import javax.media.nativewindow.NativeSurface;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLException;
 
-import jogamp.nativewindow.jawt.macosx.MacOSXJAWTWindow;
 import jogamp.opengl.GLDrawableImpl;
 import jogamp.opengl.GLDynamicLookupHelper;
 
@@ -93,29 +92,16 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
         this.id = id;
     }
   }
-  public enum LayeredSurfaceType {
-    None(0), Direct(1), Parented(2); 
-    
-    public final int id;
-
-    LayeredSurfaceType(int id){
-        this.id = id;
-    }
-  }
-
   private List<WeakReference<MacOSXCGLContext>> createdContexts = new ArrayList<WeakReference<MacOSXCGLContext>>();
   
   private boolean haveSetOpenGLMode = false;
   private GLBackendType openGLMode = GLBackendType.NSOPENGL;
-  protected LayeredSurfaceType layeredSurfaceType = LayeredSurfaceType.None;
   
   public MacOSXCGLDrawable(GLDrawableFactory factory, NativeSurface comp, boolean realized) {
     super(factory, comp, realized);
     initOpenGLImpl(getOpenGLMode());
   }
   
-  public final LayeredSurfaceType getLayeredSurfaceType() { return layeredSurfaceType; }
-
   protected void setRealizedImpl() {
   }
 
@@ -123,32 +109,6 @@ public abstract class MacOSXCGLDrawable extends GLDrawableImpl {
       return GLBackendType.NSOPENGL == openGLMode ? getHandle() : null;
   }
   
-  @Override
-  protected void updateHandle() {
-    final MacOSXJAWTWindow lsh = MacOSXCGLDrawableFactory.getLayeredSurfaceHost(surface);
-    if (null != lsh) {
-      if(lsh == surface) {
-          // direct surface host, eg. AWT GLCanvas
-          layeredSurfaceType = LayeredSurfaceType.Direct;
-          if (DEBUG) {
-              System.err.println("updateHandle: layerType " + layeredSurfaceType + ", backingLayer "+toHexString(lsh.getSurfaceHandle()));
-          }
-      } else {
-          // parent surface host, eg. via native parenting w/ NewtCanvasAWT
-          layeredSurfaceType = LayeredSurfaceType.Parented;
-          if (DEBUG) {
-              System.err.println("updateHandle: layerType " + layeredSurfaceType + ", backingLayer "+toHexString(getHandle()));
-          }
-      }
-    } else {
-      layeredSurfaceType = LayeredSurfaceType.None;
-      if (DEBUG) {
-          System.err.println("updateHandle: layerType " + layeredSurfaceType);
-      }
-    }
-    super.updateHandle();
-  }
-  
   protected void registerContext(MacOSXCGLContext ctx) {
     // NOTE: we need to keep track of the created contexts in order to
     // implement swapBuffers() because of how Mac OS X implements its
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
index 3c2b7aed6..30917476e 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXCGLDrawableFactory.java
@@ -50,7 +50,6 @@ import javax.media.nativewindow.AbstractGraphicsDevice;
 import javax.media.nativewindow.AbstractGraphicsScreen;
 import javax.media.nativewindow.DefaultGraphicsScreen;
 import javax.media.nativewindow.NativeSurface;
-import javax.media.nativewindow.NativeWindow;
 import javax.media.nativewindow.NativeWindowFactory;
 import javax.media.nativewindow.ProxySurface;
 import javax.media.nativewindow.macosx.MacOSXGraphicsDevice;
@@ -64,7 +63,6 @@ import javax.media.opengl.GLException;
 import javax.media.opengl.GLProfile;
 
 import jogamp.nativewindow.WrappedSurface;
-import jogamp.nativewindow.jawt.macosx.MacOSXJAWTWindow;
 import jogamp.opengl.DesktopGLDynamicLookupHelper;
 import jogamp.opengl.GLDrawableFactoryImpl;
 import jogamp.opengl.GLDrawableImpl;
@@ -259,38 +257,10 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
       return MacOSXCGLGraphicsConfiguration.getAvailableCapabilities(this, device);
   }
 
-  protected static MacOSXJAWTWindow getLayeredSurfaceHost(NativeSurface surface) {
-      if(surface instanceof NativeWindow) {
-          final NativeWindow nwThis = (NativeWindow) surface;
-          if( nwThis instanceof MacOSXJAWTWindow) {
-              // direct surface host, eg. via AWT GLCanvas
-              final MacOSXJAWTWindow r = (MacOSXJAWTWindow) nwThis;
-              return r.isOffscreenLayerSurface() ? r : null;
-          } else {
-              NativeWindow nwParent = nwThis.getParent();
-              if(null != nwParent && nwParent instanceof MacOSXJAWTWindow) {
-                  final MacOSXJAWTWindow r = (MacOSXJAWTWindow) nwParent;
-                  return r.isOffscreenLayerSurface() ? r : null;
-              }
-          }
-      }
-      return null;      
-  }
-      
   protected GLDrawableImpl createOnscreenDrawableImpl(NativeSurface target) {
     if (target == null) {
       throw new IllegalArgumentException("Null target");
     }
-    final MacOSXJAWTWindow lsh = MacOSXCGLDrawableFactory.getLayeredSurfaceHost(target);
-    if(null != lsh) {
-        // layered surface -> PBuffer
-        final MacOSXCGLGraphicsConfiguration config = (MacOSXCGLGraphicsConfiguration) target.getGraphicsConfiguration().getNativeGraphicsConfiguration();
-        final GLCapabilities chosenCaps = (GLCapabilities) config.getChosenCapabilities().cloneMutable();
-        chosenCaps.setOnscreen(false);
-        chosenCaps.setPBuffer(true);
-        config.setChosenCapabilities(chosenCaps);
-        return new MacOSXPbufferCGLDrawable(this, target, false);
-    }
     return new MacOSXOnscreenCGLDrawable(this, target);
   }
 
@@ -300,21 +270,6 @@ public class MacOSXCGLDrawableFactory extends GLDrawableFactoryImpl {
     if(!caps.isPBuffer()) {
         return new MacOSXOffscreenCGLDrawable(this, target);
     }
-
-    // PBuffer GLDrawable Creation
-    /**
-     * FIXME: Think about this ..
-     * should not be necessary ? ..
-    final List returnList = new ArrayList();
-    final GLDrawableFactory factory = this;
-    Runnable r = new Runnable() {
-        public void run() {
-          returnList.add(new MacOSXPbufferCGLDrawable(factory, target));
-        }
-      };
-    maybeDoSingleThreadedWorkaround(r);
-    return (GLDrawableImpl) returnList.get(0);
-    */
     return new MacOSXPbufferCGLDrawable(this, target, true);
   }
 
diff --git a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
index de3e90c4c..4fe6fa484 100644
--- a/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
+++ b/src/jogl/classes/jogamp/opengl/macosx/cgl/MacOSXOnscreenCGLContext.java
@@ -74,6 +74,8 @@ public class MacOSXOnscreenCGLContext extends MacOSXCGLContext {
   @Override
   protected boolean createImpl() {
     boolean res = super.createImpl();
+    lastWidth = -1; 
+    lastHeight = -1;    
     if(res && isNSContext()) {
         if(0 != updateHandle) {
             throw new InternalError("XXX1");
@@ -83,9 +85,6 @@ public class MacOSXOnscreenCGLContext extends MacOSXCGLContext {
             throw new InternalError("XXX2");
         }
     }
-    updateHandle = 0;
-    lastWidth = -1; 
-    lastHeight = -1;    
     return res;
   }
 
@@ -98,6 +97,6 @@ public class MacOSXOnscreenCGLContext extends MacOSXCGLContext {
     super.destroyImpl();    
   }
   
-  private long updateHandle;
+  private long updateHandle = 0;
   private int lastWidth, lastHeight;
 }
diff --git a/src/jogl/native/macosx/ContextUpdater.h b/src/jogl/native/macosx/ContextUpdater.h
index 3cf7315af..f00b2be57 100644
--- a/src/jogl/native/macosx/ContextUpdater.h
+++ b/src/jogl/native/macosx/ContextUpdater.h
@@ -25,17 +25,13 @@ This notification is sent whenever an NSView that has an attached NSSurface chan
 @interface ContextUpdater : NSObject
 {
 @protected
+    pthread_mutex_t resourceLock;
     NSView * view;
     NSRect viewRect;
     NSOpenGLContext *ctx;
     BOOL viewUpdated;
 }
 
-- (void) lock;
-- (void) lockInFunction:(char *)func atLine:(int)line;
-- (void) unlock;
-- (void) unlockInFunction:(char *)func atLine:(int)line;
-
 - (id) initWithContext:(NSOpenGLContext *)context view: (NSView *)nsView;
 
 - (void) update:(NSNotification *)notification;
diff --git a/src/jogl/native/macosx/ContextUpdater.m b/src/jogl/native/macosx/ContextUpdater.m
index e0668352c..a3b9b5c8c 100644
--- a/src/jogl/native/macosx/ContextUpdater.m
+++ b/src/jogl/native/macosx/ContextUpdater.m
@@ -1,43 +1,26 @@
 #import "ContextUpdater.h"
 #import <pthread.h>
 
-@implementation ContextUpdater
-{
-}
+#define VERBOSE_ON 1
 
-static pthread_mutex_t resourceLock = PTHREAD_MUTEX_INITIALIZER;
+#ifdef VERBOSE_ON
+    #define DBG_PRINT(...) NSLog(@ __VA_ARGS__)
+    // #define DBG_PRINT(...) fprintf(stderr, __VA_ARGS__); fflush(stderr)
+#else
+    #define DBG_PRINT(...)
+#endif
 
-static void printLockDebugInfo(char *message, char *func, int line)
-{
-    fprintf(stderr, "%s in function: \"%s\" at line: %d\n", message, func, line);
-    fflush(NULL);
-}
+#ifndef CGL_VERSION_1_3
+    #warning this SDK doesn't support OpenGL profile
+#endif
 
-- (void) lock
-{
-    pthread_mutex_lock(&resourceLock);
-}
-
-- (void) lockInFunction:(char *)func atLine:(int)line
-{
-    printLockDebugInfo("locked  ", func, line);
-    [self lock];
-}
-
-- (void) unlock
-{
-    pthread_mutex_unlock(&resourceLock);
-}
-
-- (void) unlockInFunction:(char *)func atLine:(int)line
+@implementation ContextUpdater
 {
-    printLockDebugInfo("unlocked", func, line);
-    [self unlock];
 }
 
 - (void) update:(NSNotification *)notification
 {
-    [self lock];
+    pthread_mutex_lock(&resourceLock);
     
     NSRect r = [view frame];
     if(viewRect.origin.x != r.origin.x || 
@@ -48,24 +31,26 @@ static void printLockDebugInfo(char *message, char *func, int line)
         viewRect = r;
     }
 
-    [self unlock];
+    pthread_mutex_unlock(&resourceLock);
 }
 
 - (BOOL) needsUpdate
 {
     BOOL r;
-    [self lock];
+    pthread_mutex_lock(&resourceLock);
     
     r = viewUpdated;
     viewUpdated = FALSE;
     
-    [self unlock];
+    pthread_mutex_unlock(&resourceLock);
 
     return r;
 }
 
 - (id) initWithContext:(NSOpenGLContext *)context view: (NSView *)nsView
 {
+    DBG_PRINT("ContextUpdater::init.0 view %p, ctx %p\n", view, ctx);
+    pthread_mutex_init(&resourceLock, NULL); // fast non-recursive
     ctx = context;
     view = nsView;
     [ctx retain];
@@ -73,15 +58,19 @@ static void printLockDebugInfo(char *message, char *func, int line)
     viewRect = [view frame];
     viewUpdated = TRUE;
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(update:) name:NSViewGlobalFrameDidChangeNotification object: view];
+    DBG_PRINT("ContextUpdater::init.X\n");
 
     return [super init];
 }
 
 - (void) dealloc
 {
+    DBG_PRINT("ContextUpdater::dealloc.0 view %p, ctx %p\n", view, ctx);
     [[NSNotificationCenter defaultCenter] removeObserver:self];
     [view release];
     [ctx release];
+    pthread_mutex_destroy(&resourceLock);
+    DBG_PRINT("ContextUpdater::dealloc.X\n");
     
     [super dealloc];
 }
diff --git a/src/jogl/native/macosx/MacOSXWindowSystemInterface.h b/src/jogl/native/macosx/MacOSXWindowSystemInterface.h
index 3625cfbde..b2d7f9db8 100644
--- a/src/jogl/native/macosx/MacOSXWindowSystemInterface.h
+++ b/src/jogl/native/macosx/MacOSXWindowSystemInterface.h
@@ -3,11 +3,11 @@
 #import <OpenGL/CGLTypes.h>
 #import <jni.h>
 
-// #define VERBOSE_ON 1
+#define VERBOSE_ON 1
 
 #ifdef VERBOSE_ON
-    // #define DBG_PRINT(...) NSLog(@ ## __VA_ARGS__)
-    #define DBG_PRINT(...) fprintf(stderr, __VA_ARGS__); fflush(stderr)
+    #define DBG_PRINT(...) NSLog(@ __VA_ARGS__)
+    // #define DBG_PRINT(...) fprintf(stderr, __VA_ARGS__); fflush(stderr)
 #else
     #define DBG_PRINT(...)
 #endif