mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "gfxReusableSurfaceWrapper.h"
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#include "gfxImageSurface.h"
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#include "pratom.h"
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gfxReusableSurfaceWrapper::gfxReusableSurfaceWrapper(gfxImageSurface* aSurface)
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: mSurface(aSurface)
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, mFormat(aSurface->Format())
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, mSurfaceData(aSurface->Data())
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, mReadCount(0)
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{
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MOZ_COUNT_CTOR(gfxReusableSurfaceWrapper);
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}
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class DeleteImageOnMainThread : public nsRunnable {
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public:
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DeleteImageOnMainThread(gfxImageSurface *aImage)
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: mImage(aImage)
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{}
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NS_IMETHOD Run()
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{
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return NS_OK;
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}
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private:
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nsRefPtr<gfxImageSurface> mImage;
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};
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gfxReusableSurfaceWrapper::~gfxReusableSurfaceWrapper()
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{
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NS_ABORT_IF_FALSE(mReadCount == 0, "Should not be locked when released");
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MOZ_COUNT_DTOR(gfxReusableSurfaceWrapper);
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if (!NS_IsMainThread()) {
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NS_DispatchToMainThread(new DeleteImageOnMainThread(mSurface));
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}
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}
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void
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gfxReusableSurfaceWrapper::ReadLock()
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{
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NS_CheckThreadSafe(_mOwningThread.GetThread(), "Only the owner thread can call ReadOnlyLock");
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PR_ATOMIC_INCREMENT(&mReadCount);
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}
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void
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gfxReusableSurfaceWrapper::ReadUnlock()
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{
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PR_ATOMIC_DECREMENT(&mReadCount);
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NS_ABORT_IF_FALSE(mReadCount >= 0, "Should not be negative");
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}
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gfxReusableSurfaceWrapper*
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gfxReusableSurfaceWrapper::GetWritable(gfxImageSurface** aSurface)
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{
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NS_CheckThreadSafe(_mOwningThread.GetThread(), "Only the owner thread can call GetWritable");
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if (mReadCount == 0) {
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*aSurface = mSurface;
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return this;
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}
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// Something else is reading the surface, copy it
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gfxImageSurface* copySurface = new gfxImageSurface(mSurface->GetSize(), mSurface->Format(), false);
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copySurface->CopyFrom(mSurface);
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*aSurface = copySurface;
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// We need to create a new wrapper since this wrapper has a read only lock.
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gfxReusableSurfaceWrapper* wrapper = new gfxReusableSurfaceWrapper(copySurface);
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return wrapper;
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}
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