Bug 1078: Add Fallback in AWTPrintLifecycle.setupPrint(): Use Onscreen GLAD if Offscreen-GLAD Realization throws an Exception (Stability)

- GLDrawableFactoryImpl: createOffscreenDrawable(..) and createDummyAutoDrawable(..)
  Temporary catch exception during setRealized(true) of newly created GLDrawable,
  to unrealize the instance before propagating the exception.

  This handling removes a memory leak in case the exception of this method is handled
  and application continues to operate, e.g. as in AWTPrintLifecycle.setupPrint().

  The underlying drawable gets unrealized, since it's setRealized(boolean)
  implementation toggles its realize-state before delegating the realize-operation.
  Hence this is functional.

- AWTPrintLifecycle.setupPrint() Stability
  Catch exception thrown by factory.createOffscreenAutoDrawable(..)'s setRealize(true)
  to continue operation w/ onscreen GLAD.

4 files changed, 50 insertions, 13 deletions

diff --git a/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java b/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java
index 956693c4a..634cfeaed 100644
--- a/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java
+++ b/src/jogl/classes/com/jogamp/opengl/util/GLDrawableUtil.java
@@ -150,7 +150,7 @@ public class GLDrawableUtil {
     }
 
     /**
-     * Return a heuristic value whether switching the {@link GLContext} is safe between {@lin GLAutoDrawable}s,
+     * Return a heuristic value whether switching the {@link GLContext} is safe between {@link GLAutoDrawable}s,
      * i.e. via {@link #swapGLContext(GLAutoDrawable, GLAutoDrawable)} or {@link #swapGLContextAndAllGLEventListener(GLAutoDrawable, GLAutoDrawable)}.
      * <p>
      * Method currently returns <code>false</code> if:
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
index 563158a72..a648e3bf6 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLCanvas.java
@@ -82,6 +82,7 @@ import javax.media.opengl.GLDrawable;
 import javax.media.opengl.GLDrawableFactory;
 import javax.media.opengl.GLEventListener;
 import javax.media.opengl.GLException;
+import javax.media.opengl.GLOffscreenAutoDrawable;
 import javax.media.opengl.GLProfile;
 import javax.media.opengl.GLRunnable;
 import javax.media.opengl.GLSharedContextSetter;
@@ -893,11 +894,22 @@ public class GLCanvas extends Canvas implements AWTGLAutoDrawable, WindowClosing
               }
               if( reqNewGLAD ) {
                   final GLDrawableFactory factory = GLDrawableFactory.getFactory(newGLADCaps.getGLProfile());
-                  printGLAD = factory.createOffscreenAutoDrawable(null, newGLADCaps, null,
-                          printAWTTiles.customTileWidth != -1 ? printAWTTiles.customTileWidth : DEFAULT_PRINT_TILE_SIZE,
-                          printAWTTiles.customTileHeight != -1 ? printAWTTiles.customTileHeight : DEFAULT_PRINT_TILE_SIZE);
-                  GLDrawableUtil.swapGLContextAndAllGLEventListener(GLCanvas.this, printGLAD);
-                  printDrawable = printGLAD.getDelegatedDrawable();
+                  GLOffscreenAutoDrawable offGLAD = null;
+                  try {
+                      offGLAD = factory.createOffscreenAutoDrawable(null, newGLADCaps, null,
+                                  printAWTTiles.customTileWidth != -1 ? printAWTTiles.customTileWidth : DEFAULT_PRINT_TILE_SIZE,
+                                  printAWTTiles.customTileHeight != -1 ? printAWTTiles.customTileHeight : DEFAULT_PRINT_TILE_SIZE);
+                  } catch (final GLException gle) {
+                      if( DEBUG ) {
+                          System.err.println("Caught: "+gle.getMessage());
+                          gle.printStackTrace();
+                      }
+                  }
+                  if( null != offGLAD ) {
+                      printGLAD = offGLAD;
+                      GLDrawableUtil.swapGLContextAndAllGLEventListener(GLCanvas.this, printGLAD);
+                      printDrawable = printGLAD.getDelegatedDrawable();
+                  }
               }
               printAWTTiles.setGLOrientation(printGLAD.isGLOriented(), printGLAD.isGLOriented());
               printAWTTiles.renderer.setTileSize(printDrawable.getSurfaceWidth(), printDrawable.getSurfaceHeight(), 0);
diff --git a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
index ff7e1971f..5e78a5df8 100644
--- a/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
+++ b/src/jogl/classes/javax/media/opengl/awt/GLJPanel.java
@@ -759,11 +759,22 @@ public class GLJPanel extends JPanel implements AWTGLAutoDrawable, WindowClosing
               }
               if( reqNewGLAD ) {
                   final GLDrawableFactory factory = GLDrawableFactory.getFactory(newGLADCaps.getGLProfile());
-                  printGLAD = factory.createOffscreenAutoDrawable(null, newGLADCaps, null,
-                          printAWTTiles.customTileWidth != -1 ? printAWTTiles.customTileWidth : DEFAULT_PRINT_TILE_SIZE,
-                          printAWTTiles.customTileHeight != -1 ? printAWTTiles.customTileHeight : DEFAULT_PRINT_TILE_SIZE);
-                  GLDrawableUtil.swapGLContextAndAllGLEventListener(GLJPanel.this, printGLAD);
-                  printDrawable = printGLAD.getDelegatedDrawable();
+                  GLOffscreenAutoDrawable offGLAD = null;
+                  try {
+                      offGLAD = factory.createOffscreenAutoDrawable(null, newGLADCaps, null,
+                              printAWTTiles.customTileWidth != -1 ? printAWTTiles.customTileWidth : DEFAULT_PRINT_TILE_SIZE,
+                              printAWTTiles.customTileHeight != -1 ? printAWTTiles.customTileHeight : DEFAULT_PRINT_TILE_SIZE);
+                  } catch (final GLException gle) {
+                      if( DEBUG ) {
+                          System.err.println("Caught: "+gle.getMessage());
+                          gle.printStackTrace();
+                      }
+                  }
+                  if( null != offGLAD ) {
+                      printGLAD = offGLAD;
+                      GLDrawableUtil.swapGLContextAndAllGLEventListener(GLJPanel.this, printGLAD);
+                      printDrawable = printGLAD.getDelegatedDrawable();
+                  }
               }
               printAWTTiles.setGLOrientation( !GLJPanel.this.skipGLOrientationVerticalFlip && printGLAD.isGLOriented(), printGLAD.isGLOriented() );
               printAWTTiles.renderer.setTileSize(printDrawable.getSurfaceWidth(), printDrawable.getSurfaceHeight(), 0);
diff --git a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
index 8d65f16d3..b51f290e9 100644
--- a/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLDrawableFactoryImpl.java
@@ -275,7 +275,14 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
                                                              final GLCapabilitiesChooser chooser,
                                                              final int width, final int height) {
     final GLDrawable drawable = createOffscreenDrawable( deviceReq, capsRequested, chooser, width, height );
-    drawable.setRealized(true);
+    try {
+        drawable.setRealized(true);
+    } catch( final GLException gle) {
+        try {
+            drawable.setRealized(false);
+        } catch( final GLException gle2) { /* ignore */ }
+        throw gle;
+    }
     if(drawable instanceof GLFBODrawableImpl) {
         return new GLOffscreenAutoDrawableImpl.FBOImpl( (GLFBODrawableImpl)drawable, null, null, null );
     }
@@ -285,7 +292,14 @@ public abstract class GLDrawableFactoryImpl extends GLDrawableFactory {
   @Override
   public final GLAutoDrawable createDummyAutoDrawable(final AbstractGraphicsDevice deviceReq, final boolean createNewDevice, final GLCapabilitiesImmutable capsRequested, final GLCapabilitiesChooser chooser) {
       final GLDrawable drawable = createDummyDrawable(deviceReq, createNewDevice, capsRequested, chooser);
-      drawable.setRealized(true);
+      try {
+          drawable.setRealized(true);
+      } catch( final GLException gle) {
+          try {
+              drawable.setRealized(false);
+          } catch( final GLException gle2) { /* ignore */ }
+          throw gle;
+      }
       final GLAutoDrawable sharedDrawable = new GLAutoDrawableDelegate(drawable, null, null, true /*ownDevice*/, null) { };
       return sharedDrawable;
   }