src/gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

   1 // Copyright (c) 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 GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
   6 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
   7
   8 #include <vector>
   9
  10 #include "base/containers/hash_tables.h"
  11 #include "gpu/command_buffer/service/gl_utils.h"
  12 #include "gpu/gpu_export.h"
  13
  14 namespace gpu {
  15 namespace gles2 {
  16
  17 class GLES2Decoder;
  18
  19 }  // namespace gles2.
  20
  21 // This class encapsulates the resources required to implement the
  22 // GL_CHROMIUM_copy_texture extension.  The copy operation is performed
  23 // via glCopyTexImage2D() or a blit to a framebuffer object.
  24 // The target of |dest_id| texture must be GL_TEXTURE_2D.
  25 class GPU_EXPORT CopyTextureCHROMIUMResourceManager {
  26  public:
  27   CopyTextureCHROMIUMResourceManager();
  28   ~CopyTextureCHROMIUMResourceManager();
  29
  30   void Initialize(const gles2::GLES2Decoder* decoder);
  31   void Destroy();
  32
  33   void DoCopyTexture(const gles2::GLES2Decoder* decoder,
  34                      GLenum source_target,
  35                      GLuint source_id,
  36                      GLenum source_internal_format,
  37                      GLuint dest_id,
  38                      GLint dest_level,
  39                      GLenum dest_internal_format,
  40                      GLsizei width,
  41                      GLsizei height,
  42                      bool flip_y,
  43                      bool premultiply_alpha,
  44                      bool unpremultiply_alpha);
  45
  46   // This will apply a transform on the source texture before copying to
  47   // destination texture.
  48   void DoCopyTextureWithTransform(const gles2::GLES2Decoder* decoder,
  49                                   GLenum source_target,
  50                                   GLuint source_id,
  51                                   GLuint dest_id,
  52                                   GLint dest_level,
  53                                   GLsizei width,
  54                                   GLsizei height,
  55                                   bool flip_y,
  56                                   bool premultiply_alpha,
  57                                   bool unpremultiply_alpha,
  58                                   const GLfloat transform_matrix[16]);
  59
  60   // The attributes used during invocation of the extension.
  61   static const GLuint kVertexPositionAttrib = 0;
  62
  63  private:
  64   struct ProgramInfo {
  65     ProgramInfo()
  66         : program(0u),
  67           matrix_handle(0u),
  68           half_size_handle(0u),
  69           sampler_handle(0u) {}
  70
  71     GLuint program;
  72     GLuint matrix_handle;
  73     GLuint half_size_handle;
  74     GLuint sampler_handle;
  75   };
  76
  77   bool initialized_;
  78   typedef std::vector<GLuint> ShaderVector;
  79   ShaderVector vertex_shaders_;
  80   ShaderVector fragment_shaders_;
  81   typedef std::pair<int, int> ProgramMapKey;
  82   typedef base::hash_map<ProgramMapKey, ProgramInfo> ProgramMap;
  83   ProgramMap programs_;
  84   GLuint buffer_id_;
  85   GLuint framebuffer_;
  86
  87   DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
  88 };
  89
  90 }  // namespace gpu.
  91
  92 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_