Cleanup GLDrawableFactory API and platform Implementations

- Finish API change using the AbstractGraphicsDevice, which denotes the target device
  for the desired NativeSurface / GLDrawable.
  The AbstractGraphicsDevice argument may be null to reflect the platform's default device.
  Clarified API documentation.
  This move is necessary to make the API coherent.

- createOffscreenDrawable(..) may create a Pbuffer drawable if caps and supported.
  This unifies the functionality with createGLDrawable(..).
  Further more, a Pbuffer drawable is an offscreen as well.

- added createOffscreenSurface(..) following the same behavior as createOffscreenDrawable(..),
  this is a convenient native offscreen surface factory entry.

- removed createGLPbufferDrawable(..), use createOffscreenDrawable(..),
  since it is redundant!

Implementation Details:

- EGLDrawableFactory holds a shared native EGLGraphicsDevice,
  being used by the offscreen EGL drawable (no more multiple creation).

1 files changed, 3 insertions, 1 deletions

diff --git a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
index 5c6be8bc4..c8bfe94d8 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
@@ -966,6 +966,7 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
     public void initialize() {
       // Fall-through path: create an offscreen context instead
       offscreenDrawable = (GLDrawableImpl) factory.createOffscreenDrawable(
+                                                null /* default platform device */,
                                                 offscreenCaps,
                                                 chooser,
                                                 Math.max(1, panelWidth),
@@ -1051,7 +1052,8 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable {
         throw new InternalError("Creating pbuffer twice without destroying it (memory leak / correctness bug)");
       }
       try {
-        pbuffer = factory.createGLPbuffer(offscreenCaps,
+        pbuffer = factory.createGLPbuffer(null /* default platform device */,
+                                          offscreenCaps,
                                           null,
                                           pbufferWidth,
                                           pbufferHeight,