cc/output/geometry_binding.h

   1 // Copyright 2011 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_GEOMETRY_BINDING_H_
   6 #define CC_OUTPUT_GEOMETRY_BINDING_H_
   7
   8 #include "base/basictypes.h"
   9 #include "third_party/khronos/GLES2/gl2.h"
  10
  11 namespace gfx {
  12 class RectF;
  13 }
  14 namespace gpu {
  15 namespace gles2 {
  16 class GLES2Interface;
  17 }
  18 }
  19
  20 namespace cc {
  21
  22 class GeometryBinding {
  23  public:
  24   GeometryBinding(gpu::gles2::GLES2Interface* gl,
  25                   const gfx::RectF& quad_vertex_rect);
  26   ~GeometryBinding();
  27
  28   void PrepareForDraw();
  29
  30   // All layer shaders share the same attribute locations for the vertex
  31   // positions and texture coordinates. This allows switching shaders without
  32   // rebinding attribute arrays.
  33   static int PositionAttribLocation() { return 0; }
  34   static int TexCoordAttribLocation() { return 1; }
  35   static int TriangleIndexAttribLocation() { return 2; }
  36
  37  private:
  38   gpu::gles2::GLES2Interface* gl_;
  39
  40   GLuint quad_vertices_vbo_;
  41   GLuint quad_elements_vbo_;
  42
  43   DISALLOW_COPY_AND_ASSIGN(GeometryBinding);
  44 };
  45
  46 }  // namespace cc
  47
  48 #endif  // CC_OUTPUT_GEOMETRY_BINDING_H_