Implement filter primitive subregion on accelerated reference filters (FEColorMatrix a…

Source/core/platform/graphics/GraphicsLayer.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1235 matching lines @@
     // WebFilterOperations altogether.
     if (filters.hasReferenceFilter()) {
         if (filters.hasCustomFilter()) {
             // Make sure the filters are removed from the platform layer, as they are
             // going to fallback to software mode.
             m_layer->layer()->setFilter(0);
             m_filters = FilterOperations();
             return false;
         }
         SkiaImageFilterBuilder builder;
+        FilterOutsets outsets = filters.outsets();
+        builder.setCropOffset(FloatSize(outsets.left(), outsets.top()));
         RefPtr<SkImageFilter> imageFilter = builder.build(filters);
         m_layer->layer()->setFilter(imageFilter.get());
     } else {
         OwnPtr<WebFilterOperations> webFilters = adoptPtr(Platform::current()->compositorSupport()->createFilterOperations());
         if (!copyWebCoreFilterOperationsToWebFilterOperations(filters, *webFilters)) {
             // Make sure the filters are removed from the platform layer, as they are
             // going to fallback to software mode.
             webFilters->clear();
             m_layer->layer()->setFilters(*webFilters);
             m_filters = FilterOperations();
@@ skipping 65 matching lines @@
 #ifndef NDEBUG
 void showGraphicsLayerTree(const WebCore::GraphicsLayer* layer)
 {
     if (!layer)
         return;
 
     String output = layer->layerTreeAsText(WebCore::LayerTreeIncludesDebugInfo);
     fprintf(stderr, "%s\n", output.utf8().data());
 }
 #endif