Better shared GLAutoDrawable synchronization: Block slave instances to also block until all master's GLEventListener.init(..) methods have been called

Better shared GLAutoDrawable synchronization.
Block slave instances to also block until all master's GLEventListener.init(..) methods have been called

- GLSharedContextSetter: Add areAllGLEventListenerInitialized()
  - GLCanvas (SWT, AWT)
  - GLJPanel
  - GLAutoDrawableBase (GLWindow, ..)

- GLDrawableHelper's isSharedGLContextPending(..)
  takes 'areAllGLEventListenerInitialized()' into consideration
  allowing to block the slave creation until master is completed.

This solves teh use case, where the master creates resources in it's
GLEventListener initialization (buffers), which are shared with
it's slaves.

1 files changed, 14 insertions, 1 deletions

diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
index b498748fd..0e135d5e0 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableHelper.java
@@ -58,6 +58,7 @@ import javax.media.opengl.GLEventListener;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLFBODrawable;
 import javax.media.opengl.GLRunnable;
+import javax.media.opengl.GLSharedContextSetter;
 
 /** Encapsulates the implementation of most of the GLAutoDrawable's
     methods to be able to share it between GLAutoDrawable implementations like GLAutoDrawableBase, GLCanvas and GLJPanel. */
@@ -149,8 +150,14 @@ public class GLDrawableHelper {
       final GLContext shareWith;
       final boolean pending;
       if ( null != sharedAutoDrawable ) {
+          final boolean allGLELInitialized;
+          if( sharedAutoDrawable instanceof GLSharedContextSetter ) {
+              allGLELInitialized = ((GLSharedContextSetter)sharedAutoDrawable).areAllGLEventListenerInitialized();
+          } else {
+              allGLELInitialized = true; // we have to assume 'yes'
+          }
           shareWith = sharedAutoDrawable.getContext();
-          pending = null == shareWith || !shareWith.isCreated();
+          pending = null == shareWith || !shareWith.isCreated() || !allGLELInitialized;
       } else {
           shareWith = sharedContext;
           pending = null != shareWith && !shareWith.isCreated();
@@ -434,6 +441,12 @@ public class GLDrawableHelper {
     }
   }
 
+  public final boolean areAllGLEventListenerInitialized() {
+    synchronized(listenersLock) {
+        return 0 == listenersToBeInit.size();
+    }
+  }
+
   public final boolean getGLEventListenerInitState(GLEventListener listener) {
     synchronized(listenersLock) {
         return !listenersToBeInit.contains(listener);