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