ui/gl/gl_state_restorer.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 UI_GL_GL_STATE_RESTORER_H_
   6 #define UI_GL_GL_STATE_RESTORER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "ui/gl/gl_export.h"
  10
  11 namespace gpu {
  12 namespace gles2 {
  13   class GLES2Decoder;
  14 }  // namespace gles2
  15 }  // namespace gpu
  16
  17 namespace gfx {
  18
  19 // An interface for Restoring GL State.
  20 // This will expand over time to provide an more optimizable implementation.
  21 class GL_EXPORT GLStateRestorer {
  22  public:
  23   GLStateRestorer();
  24   virtual ~GLStateRestorer();
  25
  26   virtual bool IsInitialized() = 0;
  27   virtual void RestoreState(const GLStateRestorer* prev_state) = 0;
  28   virtual void RestoreAllTextureUnitBindings() = 0;
  29   virtual void RestoreActiveTextureUnitBinding(unsigned int target) = 0;
  30   virtual void RestoreFramebufferBindings() = 0;
  31   virtual void PauseQueries() = 0;
  32   virtual void ResumeQueries() = 0;
  33
  34   DISALLOW_COPY_AND_ASSIGN(GLStateRestorer);
  35 };
  36
  37 }  // namespace gfx
  38
  39 #endif  // UI_GL_GL_STATE_RESTORER_H_