cc/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_GL_RENDERER_DRAW_CACHE_H_
   6 #define CC_GL_RENDERER_DRAW_CACHE_H_
   7
   8 #include <vector>
   9
  10
  11 // Collects 4 floats at a time for easy upload to GL.
  12 struct Float4 { float data[4]; };
  13
  14 // Collects 16 floats at a time for easy upload to GL.
  15 struct Float16 { float data[16]; };
  16
  17 // A cache for storing textured quads to be drawn.  Stores the minimum required
  18 // data to tell if two back to back draws only differ in their transform. Quads
  19 // that only differ by transform may be coalesced into a single draw call.
  20 struct TexturedQuadDrawCache {
  21   TexturedQuadDrawCache();
  22   ~TexturedQuadDrawCache();
  23
  24   // Values tracked to determine if textured quads may be coalesced.
  25   int program_id;
  26   int resource_id;
  27   bool use_premultiplied_alpha;
  28   bool needs_blending;
  29
  30   // Information about the program binding that is required to draw.
  31   int uv_xform_location;
  32   int vertex_opacity_location;
  33   int matrix_location;
  34   int sampler_location;
  35
  36   // A cache for the coalesced quad data.
  37   std::vector<Float4> uv_xform_data;
  38   std::vector<float> vertex_opacity_data;
  39   std::vector<Float16> matrix_data;
  40 };
  41
  42 #endif // CC_GL_RENDERER_DRAW_CACHE_H_
  43