gecko-dev/image/RecyclingSourceSurface.h

64 строки
2.2 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=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_image_RecyclingSourceSurface_h
#define mozilla_image_RecyclingSourceSurface_h
#include "mozilla/gfx/2D.h"
namespace mozilla {
namespace image {
class imgFrame;
/**
* This surface subclass will prevent the underlying surface from being recycled
* as long as it is still alive. We will create this surface to wrap imgFrame's
* mLockedSurface, if we are accessing it on a path that will keep the surface
* alive for an indeterminate period of time (e.g. imgFrame::GetSourceSurface,
* imgFrame::Draw with a recording or capture DrawTarget).
*/
class RecyclingSourceSurface final : public gfx::DataSourceSurface {
public:
RecyclingSourceSurface(imgFrame* aParent, gfx::DataSourceSurface* aSurface);
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(RecyclingSourceSurface, override);
uint8_t* GetData() override { return mSurface->GetData(); }
int32_t Stride() override { return mSurface->Stride(); }
gfx::SurfaceType GetType() const override { return mType; }
gfx::IntSize GetSize() const override { return mSurface->GetSize(); }
gfx::SurfaceFormat GetFormat() const override {
return mSurface->GetFormat();
}
void AddSizeOfExcludingThis(MallocSizeOf aMallocSizeOf, size_t& aHeapSizeOut,
size_t& aNonHeapSizeOut, size_t& aExtHandlesOut,
uint64_t& aExtIdOut) const override {}
bool OnHeap() const override { return mSurface->OnHeap(); }
bool Map(MapType aType, MappedSurface* aMappedSurface) override {
return mSurface->Map(aType, aMappedSurface);
}
void Unmap() override { mSurface->Unmap(); }
gfx::DataSourceSurface* GetChildSurface() const { return mSurface; }
protected:
void GuaranteePersistance() override {}
~RecyclingSourceSurface() override;
RefPtr<imgFrame> mParent;
RefPtr<DataSourceSurface> mSurface;
gfx::SurfaceType mType;
};
} // namespace image
} // namespace mozilla
#endif // mozilla_image_RecyclingSourceSurface_h