cc/output/gl_renderer_draw_cache.h

   1 // Copyright 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_
   6 #define CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "third_party/skia/include/core/SkColor.h"
  12
  13 namespace cc {
  14
  15 // Collects 4 floats at a time for easy upload to GL.
  16 struct Float4 {
  17   float data[4];
  18 };
  19
  20 // Collects 16 floats at a time for easy upload to GL.
  21 struct Float16 {
  22   float data[16];
  23 };
  24
  25 // A cache for storing textured quads to be drawn.  Stores the minimum required
  26 // data to tell if two back to back draws only differ in their transform. Quads
  27 // that only differ by transform may be coalesced into a single draw call.
  28 struct TexturedQuadDrawCache {
  29   TexturedQuadDrawCache();
  30   ~TexturedQuadDrawCache();
  31
  32   // Values tracked to determine if textured quads may be coalesced.
  33   int program_id;
  34   int resource_id;
  35   bool needs_blending;
  36   SkColor background_color;
  37
  38   // Information about the program binding that is required to draw.
  39   int uv_xform_location;
  40   int background_color_location;
  41   int vertex_opacity_location;
  42   int matrix_location;
  43   int sampler_location;
  44
  45   // A cache for the coalesced quad data.
  46   std::vector<Float4> uv_xform_data;
  47   std::vector<float> vertex_opacity_data;
  48   std::vector<Float16> matrix_data;
  49
  50  private:
  51   DISALLOW_COPY_AND_ASSIGN(TexturedQuadDrawCache);
  52 };
  53
  54 }  // namespace cc
  55
  56 #endif  // CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_