cc/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_GEOMETRY_BINDING_H_
   6 #define CC_GEOMETRY_BINDING_H_
   7
   8 namespace gfx {
   9 class RectF;
  10 }
  11
  12 namespace WebKit {
  13 class WebGraphicsContext3D;
  14 }
  15
  16 namespace cc {
  17
  18 class GeometryBinding {
  19 public:
  20     GeometryBinding(WebKit::WebGraphicsContext3D*, const gfx::RectF& quadVertexRect);
  21     ~GeometryBinding();
  22
  23     bool initialized() const { return m_initialized; }
  24
  25     WebKit::WebGraphicsContext3D* context() const { return m_context; }
  26     unsigned quadVerticesVbo() const { return m_quadVerticesVbo; }
  27     unsigned quadElementsVbo() const { return m_quadElementsVbo; }
  28     unsigned quadListVerticesVbo() const { return m_quadListVerticesVbo; }
  29
  30     void prepareForDraw();
  31
  32     // All layer shaders share the same attribute locations for the vertex
  33     // positions and texture coordinates. This allows switching shaders without
  34     // rebinding attribute arrays.
  35     static int positionAttribLocation() { return 0; }
  36     static int texCoordAttribLocation() { return 1; }
  37     static int triangleIndexAttribLocation() { return 2; }
  38
  39 private:
  40     WebKit::WebGraphicsContext3D* m_context;
  41     bool m_initialized;
  42
  43     unsigned m_quadVerticesVbo;
  44     unsigned m_quadElementsVbo;
  45     unsigned m_quadListVerticesVbo;
  46 };
  47
  48 } // namespace cc
  49
  50 #endif // CC_GEOMETRY_BINDING_H_
  51