зеркало из https://github.com/mozilla/gecko-dev.git
81 строка
1.7 KiB
C++
81 строка
1.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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 final {
|
|
public:
|
|
AutoRestoreTransform() = default;
|
|
|
|
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 final {
|
|
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_
|