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
  10 namespace gfx { class RectF; }
  11
  12 namespace WebKit { class WebGraphicsContext3D; }
  13
  14 namespace cc {
  15
  16 class GeometryBinding {
  17  public:
  18   GeometryBinding(WebKit::WebGraphicsContext3D* context,
  19                   const gfx::RectF& quad_vertex_rect);
  20   ~GeometryBinding();
  21
  22   void PrepareForDraw();
  23
  24   // All layer shaders share the same attribute locations for the vertex
  25   // positions and texture coordinates. This allows switching shaders without
  26   // rebinding attribute arrays.
  27   static int PositionAttribLocation() { return 0; }
  28   static int TexCoordAttribLocation() { return 1; }
  29   static int TriangleIndexAttribLocation() { return 2; }
  30
  31  private:
  32   WebKit::WebGraphicsContext3D* context_;
  33
  34   unsigned quad_vertices_vbo_;
  35   unsigned quad_elements_vbo_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(GeometryBinding);
  38 };
  39
  40 }  // namespace cc
  41
  42 #endif  // CC_OUTPUT_GEOMETRY_BINDING_H_