Bug 665 (part 1) - Allow dis-association of GLContext's GLDrawable ..

Changes allowing re-association (incl. null) of GLContext/GLDrawable:

- GLAutoDrawable: Refine API doc 'setContext(..)'

- GLContext: Refine API doc: 'setGLDrawable(..)' 'getGLDrawable()'

- GLContextImpl.setGLDrawable(): Handle null drawable

- GLAutoDrawableDelegate/GLAutoDrawableBase: Allow null GLContext

- GLDrawableHelper.switchContext(..)/recreateGLDrawable(): Balance GLContext.setGLDrawable(..) calls

- New GLEventListenerState, holding state vector [GLEventListener, GLContext, .. ]
  impl. relocation of all components from/to GLAutoDrawable.

- GLDrawableUtil
  - Using GLEventListenerState for swapGLContextAndAllGLEventListener(..)

+++

NEWT Window*:
  - getDisplayHandle() is 'final', no more 'shortcut' code allowed
    due to re-association incl. display handle.

  - close*:
    - close config's device (was missing)
    - null config

+++

Changes allowing reconfig of Display handle as required
to re-associate pre-existing GLContext to a 'window':

- AbstractGraphicsDevice: Add isHandleOwner() / clearHandleOwner()
  - Impl. in X11GraphicsDevice and EGLGraphicsDevice, NOP in DefaultGraphicsDevice

- DefaultGraphicsConfiguration add 'setScreen(..)'

- MutableGraphicsConfiguration
  - Make DefaultGraphicsConfiguration.setScreen(..) public

- NativeWindowFactory add 'createScreen(String type, AbstractGraphicsDevice device, int screen)'
  - Refactored from SWTAccessor

- NativeWindow x11ErrorHandler: Dump Stack Trace in DEBUG mode, always.

1 files changed, 8 insertions, 10 deletions

diff --git a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
index 96d0f6e3b..7fccb6622 100644
--- a/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
+++ b/src/newt/classes/com/jogamp/newt/opengl/GLWindow.java
@@ -458,24 +458,22 @@ public class GLWindow extends GLAutoDrawableBase implements GLAutoDrawable, Wind
             } else {
                 t0 = 0;
             }
-
-            /* if (nativeWindowCreated && null != context) {
-                throw new GLException("InternalError: Native Windows has been just created, but context wasn't destroyed (is not null)");
-            } */
-            if (null == context && visible && 0 != window.getWindowHandle() && 0<getWidth()*getHeight()) {
-                NativeWindow nw;
+            
+            if (null == drawable && visible && 0 != window.getWindowHandle() && 0<getWidth()*getHeight()) {
+                if( ( null != context ) ) {
+                    throw new InternalError("GLWindow.LifecycleHook.setVisiblePost: "+WindowImpl.getThreadName()+" - Null drawable, but valid context - "+GLWindow.this);
+                }
+                final NativeWindow nw;
                 if (window.getWrappedWindow() != null) {
                     nw = NativeWindowFactory.getNativeWindow(window.getWrappedWindow(), window.getPrivateGraphicsConfiguration());
                 } else {
                     nw = window;
                 }
-                GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) nw.getGraphicsConfiguration().getChosenCapabilities();
+                final GLCapabilitiesImmutable glCaps = (GLCapabilitiesImmutable) nw.getGraphicsConfiguration().getChosenCapabilities();
                 if(null==factory) {
                     factory = GLDrawableFactory.getFactory(glCaps.getGLProfile());
                 }
-                if(null==drawable) {
-                    drawable = (GLDrawableImpl) factory.createGLDrawable(nw);
-                }
+                drawable = (GLDrawableImpl) factory.createGLDrawable(nw);
                 drawable.setRealized(true);
                 context = (GLContextImpl) drawable.createContext(sharedContext);
                 context.setContextCreationFlags(additionalCtxCreationFlags);