Reland of Revert of gpu: introduce glCopySubTextureCHROMIUM (patchset #1 id:1 of https://codereview…

gpu/command_buffer/service/gles2_cmd_copy_texture_chromium.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
 #define GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_
 
 #include <vector>
 
 #include "base/containers/hash_tables.h"
@@ skipping 17 matching lines @@
   ~CopyTextureCHROMIUMResourceManager();
 
   void Initialize(const gles2::GLES2Decoder* decoder);
   void Destroy();
 
   void DoCopyTexture(const gles2::GLES2Decoder* decoder,
                      GLenum source_target,
                      GLuint source_id,
                      GLenum source_internal_format,
                      GLuint dest_id,
-                     GLint dest_level,
                      GLenum dest_internal_format,
                      GLsizei width,
                      GLsizei height,
                      bool flip_y,
                      bool premultiply_alpha,
                      bool unpremultiply_alpha);
 
+  void DoCopySubTexture(const gles2::GLES2Decoder* decoder,
+                        GLenum source_target,
+                        GLuint source_id,
+                        GLenum source_internal_format,
+                        GLuint dest_id,
+                        GLenum dest_internal_format,
+                        GLint xoffset,
+                        GLint yoffset,
+                        GLsizei dest_width,
+                        GLsizei dest_height,
+                        GLsizei source_width,
+                        GLsizei source_height,
+                        bool flip_y,
+                        bool premultiply_alpha,
+                        bool unpremultiply_alpha);
+
   // This will apply a transform on the source texture before copying to
   // destination texture.
   void DoCopyTextureWithTransform(const gles2::GLES2Decoder* decoder,
                                   GLenum source_target,
                                   GLuint source_id,
                                   GLuint dest_id,
-                                  GLint dest_level,
                                   GLsizei width,
                                   GLsizei height,
                                   bool flip_y,
                                   bool premultiply_alpha,
                                   bool unpremultiply_alpha,
                                   const GLfloat transform_matrix[16]);
 
+  void DoCopySubTextureWithTransform(const gles2::GLES2Decoder* decoder,
+                                     GLenum source_target,
+                                     GLuint source_id,
+                                     GLuint dest_id,
+                                     GLint xoffset,
+                                     GLint yoffset,
+                                     GLsizei dest_width,
+                                     GLsizei dest_height,
+                                     GLsizei source_width,
+                                     GLsizei source_height,
+                                     bool flip_y,
+                                     bool premultiply_alpha,
+                                     bool unpremultiply_alpha,
+                                     const GLfloat transform_matrix[16]);
+
   // The attributes used during invocation of the extension.
   static const GLuint kVertexPositionAttrib = 0;
 
  private:
   struct ProgramInfo {
     ProgramInfo()
         : program(0u),
           matrix_handle(0u),
           half_size_handle(0u),
           sampler_handle(0u) {}
 
     GLuint program;
     GLuint matrix_handle;
     GLuint half_size_handle;
     GLuint sampler_handle;
   };
 
+  void DoCopyTextureInternal(const gles2::GLES2Decoder* decoder,
+                             GLenum source_target,
+                             GLuint source_id,
+                             GLuint dest_id,
+                             GLint xoffset,
+                             GLint yoffset,
+                             GLsizei dest_width,
+                             GLsizei dest_height,
+                             GLsizei source_width,
+                             GLsizei source_height,
+                             bool flip_y,
+                             bool premultiply_alpha,
+                             bool unpremultiply_alpha,
+                             const GLfloat transform_matrix[16]);
+
   bool initialized_;
   typedef std::vector<GLuint> ShaderVector;
   ShaderVector vertex_shaders_;
   ShaderVector fragment_shaders_;
   typedef std::pair<int, int> ProgramMapKey;
   typedef base::hash_map<ProgramMapKey, ProgramInfo> ProgramMap;
   ProgramMap programs_;
   GLuint buffer_id_;
   GLuint framebuffer_;
 
   DISALLOW_COPY_AND_ASSIGN(CopyTextureCHROMIUMResourceManager);
 };
 
 }  // namespace gpu.
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_GLES2_CMD_COPY_TEXTURE_CHROMIUM_H_