gpu: Add YCbCr 420v extension.

ui/gl/scoped_binders.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 UI_GL_SCOPED_BINDERS_H_
 #define UI_GL_SCOPED_BINDERS_H_
 
 #include "base/basictypes.h"
 #include "ui/gl/gl_export.h"
 
 namespace gfx {
 class GLStateRestorer;
 
 class GL_EXPORT ScopedFrameBufferBinder {
  public:
   explicit ScopedFrameBufferBinder(unsigned int fbo);
   ~ScopedFrameBufferBinder();
 
  private:
   // Whenever possible we prefer to use the current GLContext's
   // GLStateRestorer to maximize driver compabitility.
   GLStateRestorer* state_restorer_;
 
   // Failing that we use GL calls to save and restore state.
   int old_fbo_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedFrameBufferBinder);
 };
 
+class GL_EXPORT ScopedActiveTexture {
+ public:
+  ScopedActiveTexture(unsigned int texture);
+  ~ScopedActiveTexture();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int old_texture_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedActiveTexture);
+};
 
 class GL_EXPORT ScopedTextureBinder {
  public:
   ScopedTextureBinder(unsigned int target, unsigned int id);
   ~ScopedTextureBinder();
 
  private:
   // Whenever possible we prefer to use the current GLContext's
   // GLStateRestorer to maximize driver compabitility.
   GLStateRestorer* state_restorer_;
 
   // Failing that we use GL calls to save and restore state.
   int target_;
   int old_id_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedTextureBinder);
 };
 
+class GL_EXPORT ScopedUseProgram {
+ public:
+  ScopedUseProgram(unsigned int program);
+  ~ScopedUseProgram();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int old_program_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedUseProgram);
+};
+
+class GL_EXPORT ScopedEnableVertexAttribArray {
+ public:
+  ScopedEnableVertexAttribArray(unsigned int index);
+  ~ScopedEnableVertexAttribArray();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int enabled_;
+  int index_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedEnableVertexAttribArray);
+};
+
+class GL_EXPORT ScopedBufferBinder {
+ public:
+  ScopedBufferBinder(unsigned int target, unsigned int index);
+  ~ScopedBufferBinder();
+
+ private:
+  // TODO(dcastagna): Use GLStateRestorer.
+  int target_;
+  int old_id_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedBufferBinder);
+};
+
+class GL_EXPORT ScopedViewport {
+ public:
+  ScopedViewport(int x, int y, int width, int height);
+  ~ScopedViewport();
+
+ private:
+  int data_[4] = {};
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedViewport);
+};
+
 }  // namespace gfx
 
 #endif  // UI_GL_SCOPED_BINDERS_H_