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                      GLenum dest_internal_format,
  39                      GLsizei width,
  40                      GLsizei height,
  41                      bool flip_y,
  42                      bool premultiply_alpha,
  43                      bool unpremultiply_alpha);
  44
  45   void DoCopySubTexture(const gles2::GLES2Decoder* decoder,
  46                         GLenum source_target,
  47                         GLuint source_id,
  48                         GLenum source_internal_format,
  49                         GLuint dest_id,
  50                         GLenum dest_internal_format,
  51                         GLint xoffset,
  52                         GLint yoffset,
  53                         GLint x,
  54                         GLint y,
  55                         GLsizei width,
  56                         GLsizei height,
  57                         GLsizei dest_width,
  58                         GLsizei dest_height,
  59                         GLsizei source_width,
  60                         GLsizei source_height,
  61                         bool flip_y,
  62                         bool premultiply_alpha,
  63                         bool unpremultiply_alpha);
  64
  65   // This will apply a transform on the texture coordinates before sampling
  66   // the source texture and copying to the destination texture. The transform
  67   // matrix should be given in column-major form, so it can be passed
  68   // directly to GL.
  69   void DoCopyTextureWithTransform(const gles2::GLES2Decoder* decoder,
  70                                   GLenum source_target,
  71                                   GLuint source_id,
  72                                   GLuint dest_id,
  73                                   GLsizei width,
  74                                   GLsizei height,
  75                                   bool flip_y,
  76                                   bool premultiply_alpha,
  77                                   bool unpremultiply_alpha,
  78                                   const GLfloat transform_matrix[16]);
  79
  80   // The attributes used during invocation of the extension.
  81   static const GLuint kVertexPositionAttrib = 0;
  82
  83  private:
  84   struct ProgramInfo {
  85     ProgramInfo()
  86         : program(0u),
  87           vertex_translate_handle(0u),
  88           tex_coord_transform_handle(0u),
  89           half_size_handle(0u),
  90           sampler_handle(0u) {}
  91
  92     GLuint program;
  93     GLuint vertex_translate_handle;
  94     GLuint tex_coord_transform_handle;
  95     GLuint half_size_handle;
  96     GLuint sampler_handle;
  97   };
  98
  99   void DoCopyTextureInternal(const gles2::GLES2Decoder* decoder,
 100                              GLenum source_target,
 101                              GLuint source_id,
 102                              GLuint dest_id,
 103                              GLint xoffset,
 104                              GLint yoffset,
 105                              GLint x,
 106                              GLint y,
 107                              GLsizei width,
 108                              GLsizei height,
 109                              GLsizei dest_width,
 110                              GLsizei dest_height,
 111                              GLsizei source_width,
 112                              GLsizei source_height,
 113                              bool flip_y,
 114                              bool premultiply_alpha,
 115                              bool unpremultiply_alpha,
 116                              const GLfloat transform_matrix[16]);
 117
 118   bool initialized_;
 119   typedef std::vector<GLuint> ShaderVector;
 120   ShaderVector vertex_shaders_;
 121   ShaderVector fragment_shaders_;
 122   typedef std::pair<int, int> ProgramMapKey;
 123   typedef base::hash_map<ProgramMapKey, ProgramInfo> ProgramMap;
 124   ProgramMap programs_;
 125   GLuint buffer_id_;
 126   GLuint framebuffer_;
 127
 128   DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
 129 };
 130
 131 }  // namespace gpu.
 132
 133 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_