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
  12 namespace cc {
  13
  14 // Collects 4 floats at a time for easy upload to GL.
  15 struct Float4 {
  16   float data[4];
  17 };
  18
  19 // Collects 16 floats at a time for easy upload to GL.
  20 struct Float16 {
  21   float data[16];
  22 };
  23
  24 // A cache for storing textured quads to be drawn.  Stores the minimum required
  25 // data to tell if two back to back draws only differ in their transform. Quads
  26 // that only differ by transform may be coalesced into a single draw call.
  27 struct TexturedQuadDrawCache {
  28   TexturedQuadDrawCache();
  29   ~TexturedQuadDrawCache();
  30
  31   // Values tracked to determine if textured quads may be coalesced.
  32   int program_id;
  33   int resource_id;
  34   bool use_premultiplied_alpha;
  35   bool needs_blending;
  36
  37   // Information about the program binding that is required to draw.
  38   int uv_xform_location;
  39   int vertex_opacity_location;
  40   int matrix_location;
  41   int sampler_location;
  42
  43   // A cache for the coalesced quad data.
  44   std::vector<Float4> uv_xform_data;
  45   std::vector<float> vertex_opacity_data;
  46   std::vector<Float16> matrix_data;
  47
  48   DISALLOW_COPY_AND_ASSIGN(TexturedQuadDrawCache);
  49 };
  50
  51 }  // namespace cc
  52
  53 #endif  // CC_OUTPUT_GL_RENDERER_DRAW_CACHE_H_