mix-blend-mode implementation for accelerated layers

cc/layers/render_surface.h

 // Copyright 2010 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.
 
 
 #ifndef CC_LAYERS_RENDER_SURFACE_H_
 #define CC_LAYERS_RENDER_SURFACE_H_
 
 #include <vector>
 
@@ skipping 17 matching lines @@
   // Returns the rect that encloses the RenderSurfaceImpl including any
   // reflection.
   gfx::RectF DrawableContentRect() const;
 
   void SetContentRect(gfx::Rect content_rect) { content_rect_ = content_rect; }
   gfx::Rect content_rect() const { return content_rect_; }
 
   void SetDrawOpacity(float opacity) { draw_opacity_ = opacity; }
   float draw_opacity() const { return draw_opacity_; }
 
+  void SetHasBlendMode(bool has_blend_mode) {
+    has_blend_mode_ = has_blend_mode;
+  }
+  bool has_blend_mode() const { return has_blend_mode_; }
+
   void SetDrawOpacityIsAnimating(bool draw_opacity_is_animating) {
     draw_opacity_is_animating_ = draw_opacity_is_animating;
   }
   bool draw_opacity_is_animating() const { return draw_opacity_is_animating_; }
 
   void SetDrawTransform(const gfx::Transform& draw_transform) {
     draw_transform_ = draw_transform;
   }
   const gfx::Transform& draw_transform() const { return draw_transform_; }
 
@@ skipping 64 matching lines @@
  private:
   friend struct LayerIteratorActions;
 
   Layer* owning_layer_;
 
   // Uses this surface's space.
   gfx::Rect content_rect_;
 
   float draw_opacity_;
   bool draw_opacity_is_animating_;
+  bool has_blend_mode_;
   gfx::Transform draw_transform_;
   gfx::Transform screen_space_transform_;
   gfx::Transform replica_draw_transform_;
   gfx::Transform replica_screen_space_transform_;
   bool target_surface_transforms_are_animating_;
   bool screen_space_transforms_are_animating_;
 
   bool is_clipped_;
   bool contributes_to_drawn_surface_;
 
   // Uses the space of the surface's target surface.
   gfx::Rect clip_rect_;
 
   RenderSurfaceLayerList layer_list_;
 
   // The nearest ancestor target surface that will contain the contents of this
   // surface, and that is going to move pixels within the surface (such as with
   // a blur). This can point to itself.
   RenderSurface* nearest_ancestor_that_moves_pixels_;
 
   // For LayerIteratorActions
   int target_render_surface_layer_index_history_;
   int current_layer_index_history_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderSurface);
 };
 
 }  // namespace cc
 #endif  // CC_LAYERS_RENDER_SURFACE_H_