mix-blend-mode implementation for accelerated layers - blink part

Source/core/platform/graphics/GraphicsLayer.h

 /*
  * 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 300 matching lines @@
     // opaque means that we know the layer contents have no alpha
     bool contentsOpaque() const { return m_contentsOpaque; }
     void setContentsOpaque(bool);
 
     bool backfaceVisibility() const { return m_backfaceVisibility; }
     void setBackfaceVisibility(bool visible);
 
     float opacity() const { return m_opacity; }
     void setOpacity(float);
 
+    BlendMode blendMode() const { return m_blendMode; }
+    void setBlendMode(BlendMode);
+
+    bool isRootForIsolatedGroup() const { return m_isRootForIsolatedGroup; }
+    void setIsRootForIsolatedGroup(bool);
+
     const FilterOperations& filters() const { return m_filters; }
 
     // Returns true if filter can be rendered by the compositor
     bool setFilters(const FilterOperations&);
     void setBackgroundFilters(const FilterOperations&);
 
     // Some GraphicsLayers paint only the foreground or the background content
     GraphicsLayerPaintingPhase paintingPhase() const { return m_paintingPhase; }
     void setPaintingPhase(GraphicsLayerPaintingPhase phase) { m_paintingPhase = phase; }
 
@@ skipping 156 matching lines @@
     FloatSize m_size;
     FloatPoint m_boundsOrigin;
 
     TransformationMatrix m_transform;
     TransformationMatrix m_childrenTransform;
 
     Color m_backgroundColor;
     float m_opacity;
     float m_zPosition;
 
+    BlendMode m_blendMode;
+    bool m_isRootForIsolatedGroup : 1;

[shawnsingh, 2013/09/13 10:22:59]

As far as I know, declaring a bitfield here, in-between two other data types,
will be a no-op.  It seems like you would want to put this boolean with the rest
of them a few lines below, so that the new boolean will fall into the existing
bitfield being declared.

[rosca, 2013/09/19 14:26:54]

Done.

+
     FilterOperations m_filters;
 
     bool m_contentsOpaque : 1;
     bool m_preserves3D: 1;
     bool m_backfaceVisibility : 1;
     bool m_masksToBounds : 1;
     bool m_drawsContent : 1;
     bool m_contentsVisible : 1;
 
     GraphicsLayerPaintingPhase m_paintingPhase;
@@ skipping 42 matching lines @@
 
 
 } // namespace WebCore
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showGraphicsLayerTree(const WebCore::GraphicsLayer* layer);
 #endif
 
 #endif // GraphicsLayer_h