Uncomment the Java compositor integration, except for the part that causes PowerVR crashes

mobile/android/base/gfx/GeckoGLLayerClient.java

@@ -224,6 +224,7 @@ public class GeckoGLLayerClient extends GeckoLayerClient
         // Create the shaders and textures if necessary.
         if (!mLayerRendererInitialized) {
             mLayerRenderer.onSurfaceCreated(null, null);
+            mLayerRendererInitialized = true;
         }
 
         // FIXME: This geometry is surely wrong.

mobile/android/base/gfx/LayerRenderer.java

@@ -212,6 +212,8 @@ public class LayerRenderer implements GLSurfaceView.Renderer {
         GLES20.glGetIntegerv(GLES20.GL_MAX_TEXTURE_SIZE, maxTextureSizeResult, 0);
         mMaxTextureSize = maxTextureSizeResult[0];
 
+        /*
+
         // Add the program to the OpenGL environment
         GLES20.glUseProgram(mProgram);
 
@@ -219,12 +221,19 @@ public class LayerRenderer implements GLSurfaceView.Renderer {
         GLES20.glUniformMatrix4fv(mTMatrixHandle, 1, false, TEXTURE_MATRIX, 0);
 
         // Enable the arrays from which we get the vertex and texture coordinates
+        Log.e(LOGTAG, "### Position handle is " + mPositionHandle + ", texture handle is " +
+              mTextureHandle + ", last error is " + GLES20.glGetError());
+
+        // FIXME: This crashes PowerVR drivers. Seems that we cannot actually use multiple GL
+        // programs reliably.
         GLES20.glEnableVertexAttribArray(mPositionHandle);
         GLES20.glEnableVertexAttribArray(mTextureHandle);
 
         GLES20.glUniform1i(mSampleHandle, 0);
 
         TextureGenerator.get().fill();
+
+        */
     }
 
     public int getMaxTextureSize() {

widget/android/nsWindow.cpp

@@ -2388,30 +2388,37 @@ nsWindow::GetIMEUpdatePreference()
 #ifdef MOZ_JAVA_COMPOSITOR
 void
 nsWindow::DrawWindowUnderlay(LayerManager* aManager, nsIntRect aRect) {
-#if 0
-    TransformLayerUserData* userData =
-        static_cast<TransformLayerUserData*>(aManager->GetUserData(nsGkAtoms::transform));
+    AndroidBridge::AutoLocalJNIFrame jniFrame(GetJNIForThread());
+
+    mozilla::layers::LayerUserData* userData = aManager->GetUserData(nsGkAtoms::transform);
+    mozilla::layers::TransformLayerUserData* transformUserData =
+        static_cast<mozilla::layers::TransformLayerUserData*>(userData);
     NS_ABORT_IF_FALSE(userData, "No transform user data!");
 
     // Transform the unit square to figure out the offset and scale we need.
     gfxRect rect(0, 0, 1, 1);
-    userData->matrix.TransformBounds(rect);
+    transformUserData->matrix.TransformBounds(rect);
 
     AndroidGeckoLayerClient& client = AndroidBridge::Bridge()->GetLayerClient();
     AndroidGeckoGLLayerClient& glClient = static_cast<AndroidGeckoGLLayerClient&>(client);
     glClient.CreateFrame(mLayerRendererFrame, rect.x, rect.y, rect.width);
+
+#if 0
     mLayerRendererFrame.DrawBackground();
 #endif
 }
 
 void
 nsWindow::DrawWindowOverlay(LayerManager* aManager, nsIntRect aRect) {
-#if 0
+    AndroidBridge::AutoLocalJNIFrame jniFrame(GetJNIForThread());
     NS_ABORT_IF_FALSE(!mLayerRendererFrame.isNull(),
                       "Frame should have been created in DrawWindowUnderlay()!");
+
+#if 0
     mLayerRendererFrame.DrawForeground();
-    mLayerRendererFrame.Dispose();
 #endif
+
+    mLayerRendererFrame.Dispose();
 }
 #endif