michael@0: /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef MOZILLA_GFX_2D_HELPERS_H_
michael@0: #define MOZILLA_GFX_2D_HELPERS_H_
michael@0: 
michael@0: #include "2D.h"
michael@0: 
michael@0: namespace mozilla {
michael@0: namespace gfx {
michael@0: 
michael@0: class AutoSaveTransform
michael@0: {
michael@0:  public:
michael@0:   AutoSaveTransform(DrawTarget *aTarget)
michael@0:    : mDrawTarget(aTarget),
michael@0:      mOldTransform(aTarget->GetTransform())
michael@0:   {
michael@0:   }
michael@0:   ~AutoSaveTransform()
michael@0:   {
michael@0:     mDrawTarget->SetTransform(mOldTransform);
michael@0:   }
michael@0: 
michael@0:  private:
michael@0:   RefPtr<DrawTarget> mDrawTarget;
michael@0:   Matrix mOldTransform;
michael@0: };
michael@0: 
michael@0: } // namespace gfx
michael@0: } // namespace mozilla
michael@0: 
michael@0: #endif // MOZILLA_GFX_2D_HELPERS_H_