Make CopyTextureCHROMIUM restore its own state

gpu/command_buffer/service/gles2_cmd_decoder.cc

 // 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.
 
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 
 #include <stdio.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 9563 matching lines @@
     SetGLError(GL_INVALID_VALUE,
              "glCopyTextureCHROMIUM", "Bad dimensions");
     return;
   }
 
   // Defer initializing the CopyTextureCHROMIUMResourceManager until it is
   // needed because it takes 10s of milliseconds to initialize.
   if (!copy_texture_CHROMIUM_.get()) {
     CopyRealGLErrorsToWrapper();
     copy_texture_CHROMIUM_.reset(new CopyTextureCHROMIUMResourceManager());
-    copy_texture_CHROMIUM_->Initialize();
+    copy_texture_CHROMIUM_->Initialize(this);
     RestoreCurrentFramebufferBindings();
     if (PeekGLError() != GL_NO_ERROR)
       return;
   }
 
   GLenum dest_type;
   GLenum dest_internal_format;
   bool dest_level_defined = dest_info->GetLevelSize(GL_TEXTURE_2D, level,
                                                     &dest_width,
                                                     &dest_height);
@@ skipping 23 matching lines @@
       return;
     }
 
     texture_manager()->SetLevelInfo(
         dest_info, GL_TEXTURE_2D, level, internal_format, source_width,
         source_height, 1, 0, internal_format, dest_type, true);
   } else {
     texture_manager()->SetLevelCleared(dest_info, GL_TEXTURE_2D, level, true);
   }
 
-  clear_state_dirty_ = true;
-  glViewport(0, 0, source_width, source_height);
-  copy_texture_CHROMIUM_->DoCopyTexture(target, source_info->service_id(),
+  copy_texture_CHROMIUM_->DoCopyTexture(this,
+                                        target, source_info->service_id(),
                                         dest_info->service_id(), level,
+                                        source_width, source_height,
                                         unpack_flip_y_,
                                         unpack_premultiply_alpha_,
                                         unpack_unpremultiply_alpha_);
-  glViewport(
-      state_.viewport_x, state_.viewport_y,
-      state_.viewport_width, state_.viewport_height);
-
-  // Restore all of the state touched by the extension.
-  if (state_.current_program)
-    glUseProgram(state_.current_program->service_id());
-  else
-    glUseProgram(0);
-
-  RestoreCurrentFramebufferBindings();
-  RestoreCurrentTexture2DBindings();
-  RestoreStateForAttrib(
-      CopyTextureCHROMIUMResourceManager::kVertexPositionAttrib);
-  RestoreStateForAttrib(
-      CopyTextureCHROMIUMResourceManager::kVertexTextureAttrib);
-
-  ApplyDirtyState();
 }
 
 static GLenum ExtractTypeFromStorageFormat(GLenum internalformat) {
   switch (internalformat) {
     case GL_RGB565:
       return GL_UNSIGNED_SHORT_5_6_5;
     case GL_RGBA4:
       return GL_UNSIGNED_SHORT_4_4_4_4;
     case GL_RGB5_A1:
       return GL_UNSIGNED_SHORT_5_5_5_1;
@@ skipping 510 matching lines @@
   return error::kNoError;
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu