Fix Bug 617 (part2): Workaround buggy GPU driver where FBO reattachment of Colorbuffer w/ diff size leads to GL_FRAMEBUFFER_UNSUPPORTED.

This occured at least on:
  - OS X 10.6.8
  - GL_RENDERER    NVIDIA GeForce 7300 GT OpenGL Engine
  - GL_VERSION     2.1 NVIDIA-1.6.36

Remedy is to catch the exception @ GLFBODrawableImpl.reset(..) and switch over to
fallback 'reset' method:
  FBO reattachment -> FBO complete recreation

Of course, the FBO recreation is noticable slower,
but at least it seems to work on the offending system.

Not tested on the offending system, but manually provoked GLException on FBOObject
to trigger fallback, which is working here.

1 files changed, 43 insertions, 22 deletions

diff --git a/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
index f14c7e5e7..a516060fb 100644
--- a/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
+++ b/src/jogl/classes/jogamp/opengl/GLFBODrawableImpl.java
@@ -11,11 +11,13 @@ import javax.media.opengl.GLContext;
 import javax.media.opengl.GLException;
 import javax.media.opengl.GLFBODrawable;
 
+import com.jogamp.common.util.VersionUtil;
 import com.jogamp.nativewindow.MutableGraphicsConfiguration;
 import com.jogamp.opengl.FBObject;
 import com.jogamp.opengl.FBObject.Attachment;
 import com.jogamp.opengl.FBObject.Colorbuffer;
 import com.jogamp.opengl.FBObject.TextureAttachment;
+import com.jogamp.opengl.JoglVersion;
 
 /**
  * {@link FBObject} offscreen GLDrawable implementation, i.e. {@link GLFBODrawable}.
@@ -43,12 +45,15 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
     private boolean initialized;
     private int texUnit;
     private int samples;
+    private boolean fboResetQuirk;
     
     private FBObject[] fbos;
     private int fboIBack;  // points to GL_BACK buffer
     private int fboIFront; // points to GL_FRONT buffer
     private int pendingFBOReset = -1;
     private boolean fboBound;
+
+    private static volatile boolean resetQuirkInfoDumped = false;
     private static final int bufferCount = 2; // number of FBOs for double buffering. TODO: Possible to configure!
     
     // private DoubleBufferMode doubleBufferMode; // TODO: Add or remove TEXTURE (only) DoubleBufferMode support
@@ -75,6 +80,7 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
         this.origParentChosenCaps = (GLCapabilitiesImmutable) getChosenGLCapabilities(); // just to avoid null, will be reset at initialize(..)
         this.texUnit = textureUnit;
         this.samples = fboCaps.getNumSamples();
+        fboResetQuirk = false;
         
         // default .. // TODO: Add or remove TEXTURE (only) DoubleBufferMode support
         // this.doubleBufferMode = ( samples > 0 || fboCaps.getDoubleBuffered() ) ? DoubleBufferMode.FBO : DoubleBufferMode.NONE ;
@@ -151,31 +157,46 @@ public class GLFBODrawableImpl extends GLDrawableImpl implements GLFBODrawable {
         swapBufferContext = sbc;
     }
 
-    static final boolean FBOResetQuirk = false;
-    
     private final void reset(GL gl, int idx, int width, int height, int samples, int alphaBits, int stencilBits) {
-        if( !FBOResetQuirk ) {
-            fbos[idx].reset(gl, width, height, samples, false);
-            if(fbos[idx].getNumSamples() != samples) {
-                throw new InternalError("Sample number mismatch: "+samples+", fbos["+idx+"] "+fbos[idx]);
+        if( !fboResetQuirk ) {
+            try {
+                fbos[idx].reset(gl, width, height, samples, false);
+                if(fbos[idx].getNumSamples() != samples) {
+                    throw new InternalError("Sample number mismatch: "+samples+", fbos["+idx+"] "+fbos[idx]);
+                }
+                return;
+            } catch (GLException e) {
+                if(DEBUG) {
+                    e.printStackTrace();
+                }
+                if(!resetQuirkInfoDumped) { // dump info only once
+                    resetQuirkInfoDumped = true;
+                    System.err.println("GLFBODrawable: Reset failed: "+e.getMessage());
+                    System.err.println("GLFBODrawable: Enabling FBOResetQuirk, due to previous GLException. "+this.toString());
+                    System.err.println(VersionUtil.getPlatformInfo());
+                    System.err.println(JoglVersion.getInstance());
+                    System.err.println(JoglVersion.getGLInfo(gl, null));
+                }
+                fboResetQuirk = true;
+                // 'fallthrough' intended
             }
+        }
+        // resetQuirk fallback
+        fbos[idx].destroy(gl);
+        fbos[idx] = new FBObject();
+        fbos[idx].reset(gl, getWidth(), getHeight(), samples, false);
+        if(fbos[idx].getNumSamples() != samples) {
+            throw new InternalError("Sample number mismatch: "+samples+", fbos["+idx+"] "+fbos[idx]);
+        }
+        if(samples > 0) {
+            fbos[idx].attachColorbuffer(gl, 0, alphaBits>0);
         } else {
-            fbos[idx].destroy(gl);
-            fbos[idx] = new FBObject();
-            fbos[idx].reset(gl, getWidth(), getHeight(), samples, false);
-            if(fbos[idx].getNumSamples() != samples) {
-                throw new InternalError("Sample number mismatch: "+samples+", fbos["+idx+"] "+fbos[idx]);
-            }
-            if(samples > 0) {
-                fbos[idx].attachColorbuffer(gl, 0, alphaBits>0);
-            } else {
-                fbos[idx].attachTexture2D(gl, 0, alphaBits>0);
-            }
-            if( stencilBits > 0 ) {
-                fbos[idx].attachRenderbuffer(gl, Attachment.Type.DEPTH_STENCIL, 24);
-            } else {
-                fbos[idx].attachRenderbuffer(gl, Attachment.Type.DEPTH, 24);
-            }
+            fbos[idx].attachTexture2D(gl, 0, alphaBits>0);
+        }
+        if( stencilBits > 0 ) {
+            fbos[idx].attachRenderbuffer(gl, Attachment.Type.DEPTH_STENCIL, 24);
+        } else {
+            fbos[idx].attachRenderbuffer(gl, Attachment.Type.DEPTH, 24);
         }
     }