color: Add support for shader generation

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/logging.h"
 #include "base/macros.h"
 #include "cc/base/cc_export.h"
 
 namespace gfx {
+class ColorTransform;
 class Point;
 class Size;
 }
 
 namespace gpu {
 namespace gles2 {
 class GLES2Interface;
 }
 }
 
@@ skipping 105 matching lines @@
   YUV_HAS_ALPHA_TEXTURE,
 };
 
 enum ColorConversionMode {
   // No color conversion is performed.
   COLOR_CONVERSION_MODE_NONE,
   // Conversion is done directly from input RGB space (or YUV space if
   // applicable) to output RGB space, via a 3D texture represented as a 2D
   // texture.
   COLOR_CONVERSION_MODE_LUT,
+  // Conversion is done analytically in the shader.
+  COLOR_CONVERSION_MODE_SHADER,
 };
 
 // TODO(ccameron): Merge this with BlendMode.
 enum FragColorMode {
   FRAG_COLOR_MODE_DEFAULT,
   FRAG_COLOR_MODE_OPAQUE,
   FRAG_COLOR_MODE_APPLY_BLEND_MODE,
 };
 
 enum MaskMode {
@@ skipping 128 matching lines @@
   SamplerType sampler_type_ = SAMPLER_TYPE_NA;
 
   BlendMode blend_mode_ = BLEND_MODE_NONE;
   bool mask_for_background_ = false;
 
   // YUV-only parameters.
   YUVAlphaTextureMode yuv_alpha_texture_mode_ = YUV_ALPHA_TEXTURE_MODE_NA;
   UVTextureMode uv_texture_mode_ = UV_TEXTURE_MODE_UV;
 
   ColorConversionMode color_conversion_mode_ = COLOR_CONVERSION_MODE_NONE;
+  const gfx::ColorTransform* color_transform_ = nullptr;
 
   // YUV uniform locations.
   int y_texture_location_ = -1;
   int u_texture_location_ = -1;
   int v_texture_location_ = -1;
   int uv_texture_location_ = -1;
   int a_texture_location_ = -1;
   int ya_clamp_rect_location_ = -1;
   int uv_clamp_rect_location_ = -1;
 
-  // This matrix will convert from the values read in the YUV texture to
-  // RGB (including resource offset and scale). If we are using LUT based
-  // color conversion, then this will only perform resource offset and scale.
-  int yuv_and_resource_matrix_location_ = -1;
+  // The resource offset and multiplier to adjust for bit depth.
+  int resource_multiplier_location_ = -1;
+  int resource_offset_location_ = -1;
 
   // LUT YUV to color-converted RGB.
   int lut_texture_location_ = -1;
   int lut_size_location_ = -1;
 
  private:
   friend class Program;
 
   std::string GetHelperFunctions() const;
   std::string GetBlendFunction() const;
   std::string GetBlendFunctionBodyForAlpha() const;
   std::string GetBlendFunctionBodyForRGB() const;
 
   DISALLOW_COPY_AND_ASSIGN(FragmentShader);
 };
 
 }  // namespace cc
 
 #endif  // CC_OUTPUT_SHADER_H_