64 lines
1.8 KiB
C++
64 lines
1.8 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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#ifndef GFXSHMCOWSURFACEWRAPPER
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#define GFXSHMCOWSURFACEWRAPPER
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#include "gfxReusableSurfaceWrapper.h"
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#include "mozilla/RefPtr.h"
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class gfxSharedImageSurface;
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namespace mozilla {
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namespace ipc {
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class Shmem;
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} // namespace ipc
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namespace layers {
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class ISurfaceAllocator;
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} // namespace layers
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} // namespace mozilla
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/**
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* A cross-process capable implementation of gfxReusableSurfaceWrapper based
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* on gfxSharedImageSurface.
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*/
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class gfxReusableSharedImageSurfaceWrapper : public gfxReusableSurfaceWrapper {
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public:
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gfxReusableSharedImageSurfaceWrapper(mozilla::layers::ISurfaceAllocator* aAllocator,
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gfxSharedImageSurface* aSurface);
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protected:
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~gfxReusableSharedImageSurfaceWrapper();
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public:
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const unsigned char* GetReadOnlyData() const override;
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gfxImageFormat Format() override;
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gfxReusableSurfaceWrapper* GetWritable(gfxImageSurface** aSurface) override;
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void ReadLock() override;
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void ReadUnlock() override;
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Type GetType() override
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{
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return TYPE_SHARED_IMAGE;
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}
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/**
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* Returns the shared memory segment that backs the shared image surface.
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*/
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mozilla::ipc::Shmem& GetShmem();
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/**
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* Create a gfxReusableSurfaceWrapper from the shared memory segment of a
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* gfxSharedImageSurface. A ReadLock must be held, which will be adopted by
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* the returned gfxReusableSurfaceWrapper.
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*/
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static already_AddRefed<gfxReusableSharedImageSurfaceWrapper>
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Open(mozilla::layers::ISurfaceAllocator* aAllocator, const mozilla::ipc::Shmem& aShmem);
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private:
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RefPtr<mozilla::layers::ISurfaceAllocator> mAllocator;
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RefPtr<gfxSharedImageSurface> mSurface;
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};
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#endif // GFXSHMCOWSURFACEWRAPPER
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