Implement SkImageFilter support in the compositor.

cc/occlusion_tracker.cc

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "cc/occlusion_tracker.h"
 
 #include "CCLayerImpl.h"
 #include "cc/layer.h"
@@ skipping 82 matching lines @@
 
 template<typename LayerType, typename RenderSurfaceType>
 void OcclusionTrackerBase<LayerType, RenderSurfaceType>::finishedRenderTarget(const LayerType* finishedTarget)
 {
     // Make sure we know about the target surface.
     enterRenderTarget(finishedTarget);
 
     RenderSurfaceType* surface = finishedTarget->renderSurface();
 
     // If the occlusion within the surface can not be applied to things outside of the surface's subtree, then clear the occlusion here so it won't be used.
-    if (finishedTarget->maskLayer() || !surfaceOpacityKnown(surface) || surface->drawOpacity() < 1 || finishedTarget->filters().hasFilterThatAffectsOpacity()) {
+    // TODO(senorblanco):  Make this smarter for SkImageFilter case:  once
+    // SkImageFilters can report affectsOpacity(), call that.
+    if (finishedTarget->maskLayer() || !surfaceOpacityKnown(surface) || surface->drawOpacity() < 1 || finishedTarget->filters().hasFilterThatAffectsOpacity() || finishedTarget->filter()) {
         m_stack.last().occlusionInScreen = Region();
         m_stack.last().occlusionInTarget = Region();
     } else {
         if (!surfaceTransformsToTargetKnown(surface))
             m_stack.last().occlusionInTarget = Region();
         if (!surfaceTransformsToScreenKnown(surface))
             m_stack.last().occlusionInScreen = Region();
     }
 }
 
@@ skipping 356 matching lines @@
 template void OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::finishedRenderTarget(const LayerImpl* finishedTarget);
 template void OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::leaveToRenderTarget(const LayerImpl* newTarget);
 template void OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::markOccludedBehindLayer(const LayerImpl*);
 template bool OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::occluded(const LayerImpl*, const IntRect& contentRect, bool* hasOcclusionFromOutsideTargetSurface) const;
 template IntRect OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::unoccludedContentRect(const LayerImpl*, const IntRect& contentRect, bool* hasOcclusionFromOutsideTargetSurface) const;
 template IntRect OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::unoccludedContributingSurfaceContentRect(const LayerImpl*, bool forReplica, const IntRect& contentRect, bool* hasOcclusionFromOutsideTargetSurface) const;
 template IntRect OcclusionTrackerBase<LayerImpl, RenderSurfaceImpl>::layerClipRectInTarget(const LayerImpl*) const;
 
 
 } // namespace cc