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 "gpu/command_buffer/client/gles2_interface.h"
  10 #include "third_party/khronos/GLES2/gl2.h"
  11 #include "third_party/khronos/GLES2/gl2ext.h"
  12 #include "ui/gfx/geometry/rect_f.h"
  13
  14 namespace gfx {
  15 class QuadF;
  16 class Quad;
  17 class QuadIndex;
  18 class PointF;
  19 }
  20
  21 namespace cc {
  22
  23 struct GeometryBindingVertex {
  24   float a_position[3];
  25   float a_texCoord[2];
  26   // Index of the vertex, divide by 4 to have the matrix for this quad.
  27   float a_index;
  28 };
  29
  30 struct GeometryBindingQuad {
  31   GeometryBindingQuad();
  32   GeometryBindingQuad(const GeometryBindingVertex& vert0,
  33                       const GeometryBindingVertex& vert1,
  34                       const GeometryBindingVertex& vert2,
  35                       const GeometryBindingVertex& vert3);
  36   GeometryBindingVertex v0, v1, v2, v3;
  37 };
  38
  39 struct GeometryBindingQuadIndex {
  40   GeometryBindingQuadIndex();
  41   GeometryBindingQuadIndex(uint16 index0,
  42                            uint16 index1,
  43                            uint16 index2,
  44                            uint16 index3,
  45                            uint16 index4,
  46                            uint16 index5);
  47
  48   uint16 data[6];
  49 };
  50
  51 class DrawQuad;
  52 class DrawPolygon;
  53
  54 struct GeometryBinding {
  55   // All layer shaders share the same attribute locations for the vertex
  56   // positions and texture coordinates. This allows switching shaders without
  57   // rebinding attribute arrays.
  58   static int PositionAttribLocation() { return 0; }
  59   static int TexCoordAttribLocation() { return 1; }
  60   static int TriangleIndexAttribLocation() { return 2; }
  61 };
  62
  63 void SetupGLContext(gpu::gles2::GLES2Interface* gl,
  64                     GLuint quad_elements_vbo,
  65                     GLuint quad_vertices_vbo);
  66
  67 }  // namespace cc
  68
  69 #endif  // CC_OUTPUT_GEOMETRY_BINDING_H_