Blend TextureLayer background-color at draw time.

cc/output/shader.h

 // Copyright 2011 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_SHADER_H_
 #define CC_OUTPUT_SHADER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 260 matching lines @@
   int edge_location() const { return -1; }
   int fragment_tex_transform_location() const { return -1; }
   int sampler_location() const { return sampler_location_; }
 
  private:
   int sampler_location_;
 
   DISALLOW_COPY_AND_ASSIGN(FragmentTexOpaqueBinding);
 };
 
-class FragmentShaderRGBATexVaryingAlpha : public FragmentTexOpaqueBinding {
+class FragmentTexBackgroundBinding {
+ public:
+  FragmentTexBackgroundBinding();
+
+  void Init(WebKit::WebGraphicsContext3D* context,
+            unsigned program,
+            bool using_bind_uniform,
+            int* base_uniform_index);
+  int background_color_location() const { return background_color_location_; }
+  int sampler_location() const { return sampler_location_; }
+
+ private:
+  int background_color_location_;
+  int sampler_location_;
+
+  DISALLOW_COPY_AND_ASSIGN(FragmentTexBackgroundBinding);
+};
+
+class FragmentShaderTexture : public FragmentTexBackgroundBinding {
  public:
   std::string GetShaderString(TexCoordPrecision precision) const;
 };
 
-class FragmentShaderRGBATexPremultiplyAlpha : public FragmentTexOpaqueBinding {
+class FragmentShaderNonPremulTexture : public FragmentTexBackgroundBinding {
  public:
   std::string GetShaderString(TexCoordPrecision precision) const;
 };
 
 class FragmentShaderRGBATexAlpha : public FragmentTexAlphaBinding {
  public:
   std::string GetShaderString(TexCoordPrecision precision) const;
 };
 
 class FragmentShaderRGBATexColorMatrixAlpha
     : public FragmentTexColorMatrixAlphaBinding {
  public:
     std::string GetShaderString(TexCoordPrecision precision) const;
 };
 
 class FragmentShaderRGBATexRectVaryingAlpha : public FragmentTexAlphaBinding {
  public:
+  int background_color_location() const { return -1; }
   std::string GetShaderString(TexCoordPrecision precision) const;
 };
 
 class FragmentShaderRGBATexOpaque : public FragmentTexOpaqueBinding {
  public:
   std::string GetShaderString(TexCoordPrecision precision) const;
 };
 
 class FragmentShaderRGBATex : public FragmentTexOpaqueBinding {
  public:
@@ skipping 348 matching lines @@
   int tex_transform_location_;
   int frequency_location_;
   int color_location_;
 
   DISALLOW_COPY_AND_ASSIGN(FragmentShaderCheckerboard);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SHADER_H_