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author | Pale Moon <git-repo@palemoon.org> | 2016-09-01 13:39:08 +0200 |
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committer | Pale Moon <git-repo@palemoon.org> | 2016-09-01 13:39:08 +0200 |
commit | 3d8ce1a11a7347cc94a937719c4bc8df46fb8d14 (patch) | |
tree | 8c26ca375a6312751c00a27e1653fb6f189f0463 /gfx/2d/Helpers.h | |
parent | e449bdb1ec3a82f204bffdd9c3c54069d086eee3 (diff) | |
download | palemoon-gre-3d8ce1a11a7347cc94a937719c4bc8df46fb8d14.tar.gz |
Base import of Tycho code (warning: huge commit)
Diffstat (limited to 'gfx/2d/Helpers.h')
-rw-r--r-- | gfx/2d/Helpers.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/gfx/2d/Helpers.h b/gfx/2d/Helpers.h index e69de29bb..11c7eec5d 100644 --- a/gfx/2d/Helpers.h +++ b/gfx/2d/Helpers.h @@ -0,0 +1,97 @@ +/* -*- 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<DrawTarget> mDrawTarget; + Matrix mOldTransform; +}; + +class AutoPopClips +{ +public: + explicit AutoPopClips(DrawTarget *aTarget) + : mDrawTarget(aTarget) + , mPushCount(0) + { + MOZ_ASSERT(mDrawTarget); + } + + ~AutoPopClips() + { + PopAll(); + } + + void PushClip(const Path *aPath) + { + mDrawTarget->PushClip(aPath); + ++mPushCount; + } + + void PushClipRect(const Rect &aRect) + { + mDrawTarget->PushClipRect(aRect); + ++mPushCount; + } + + void PopClip() + { + MOZ_ASSERT(mPushCount > 0); + mDrawTarget->PopClip(); + --mPushCount; + } + + void PopAll() + { + while (mPushCount-- > 0) { + mDrawTarget->PopClip(); + } + } + +private: + RefPtr<DrawTarget> mDrawTarget; + int32_t mPushCount; +}; + +} // namespace gfx +} // namespace mozilla + +#endif // MOZILLA_GFX_2D_HELPERS_H_ |