mix-blend-mode implementation for accelerated layers

cc/output/gl_renderer.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_OUTPUT_GL_RENDERER_H_
 #define CC_OUTPUT_GL_RENDERER_H_
 
 #include "base/cancelable_callback.h"
 #include "cc/base/cc_export.h"
 #include "cc/base/scoped_ptr_vector.h"
@@ skipping 86 matching lines @@
   const gfx::QuadF& SharedGeometryQuad() const { return shared_geometry_quad_; }
   const GeometryBinding* SharedGeometry() const {
     return shared_geometry_.get();
   }
 
   void GetFramebufferPixelsAsync(gfx::Rect rect,
                                  scoped_ptr<CopyOutputRequest> request);
   void GetFramebufferTexture(unsigned texture_id,
                              ResourceFormat texture_format,
                              gfx::Rect device_rect);
+  void GetFramebufferTextureSubImage(unsigned texture_id,
+                                     gfx::Point offset,
+                                     gfx::Rect device_rect);
   void ReleaseRenderPassTextures();
 
   void SetStencilEnabled(bool enabled);
   bool stencil_enabled() const { return stencil_shadow_; }
   void SetBlendEnabled(bool enabled);
   bool blend_enabled() const { return blend_shadow_; }
 
   virtual void BindFramebufferToOutputSurface(DrawingFrame* frame) OVERRIDE;
   virtual bool BindFramebufferToTexture(DrawingFrame* frame,
                                         const ScopedResource* resource,
@@ skipping 29 matching lines @@
  private:
   friend class GLRendererShaderPixelTest;
   friend class GLRendererShaderTest;
 
   static void ToGLMatrix(float* gl_matrix, const gfx::Transform& transform);
 
   void DrawCheckerboardQuad(const DrawingFrame* frame,
                             const CheckerboardDrawQuad* quad);
   void DrawDebugBorderQuad(const DrawingFrame* frame,
                            const DebugBorderDrawQuad* quad);
-  scoped_ptr<ScopedResource> DrawBackgroundFilters(
+  scoped_ptr<ScopedResource> CreateBackgroundTextureWithFilters(
       DrawingFrame* frame,
       const RenderPassDrawQuad* quad,
       const gfx::Transform& contents_device_transform,
-      const gfx::Transform& contents_device_transformInverse);
+      const gfx::Transform& contents_device_transformInverse,
+      bool& background_changed);

[shawnsingh, 2013/09/25 05:33:53]

We should not use non-const references.  Use a pointer, which is chrome's
convention to clearly show that this is a non-const out argument.

[rosca, 2013/09/25 18:00:00]

Done.

   void DrawRenderPassQuad(DrawingFrame* frame, const RenderPassDrawQuad* quad);
   void DrawSolidColorQuad(const DrawingFrame* frame,
                           const SolidColorDrawQuad* quad);
   void DrawStreamVideoQuad(const DrawingFrame* frame,
                            const StreamVideoDrawQuad* quad);
   void EnqueueTextureQuad(const DrawingFrame* frame,
                           const TextureDrawQuad* quad);
   void FlushTextureQuadCache();
   void DrawIOSurfaceQuad(const DrawingFrame* frame,
                          const IOSurfaceDrawQuad* quad);
@@ skipping 298 matching lines @@
 #if DEBUG_GL_CALLS && !defined(NDEBUG)
 #define GLC(context, x)                                                        \
   (x, GLRenderer::DebugGLCall(&* context, #x, __FILE__, __LINE__))
 #else
 #define GLC(context, x) (x)
 #endif
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_GL_RENDERER_H_