forked from mirrors/gecko-dev
ca22cda7c8
CanvasRenderingContext2D relies upon CreateSimilarDrawTarget to create extract a subrect from a surface to draw. However, DrawTargetWebgl does not return an accelerated DT for that API as creating an entirely new context can be quite expensive. To work around this, this adds a specific ExtractSubrect API for SourceSurface that can bypass the entire need to create a temporary DrawTarget to copy into. Differential Revision: https://phabricator.services.mozilla.com/D164118
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* 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
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef MOZILLA_GFX_SOURCESURFACESKIA_H_
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#define MOZILLA_GFX_SOURCESURFACESKIA_H_
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#include "2D.h"
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#include "mozilla/Mutex.h"
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#include "skia/include/core/SkRefCnt.h"
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class SkImage;
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class SkSurface;
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namespace mozilla {
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namespace gfx {
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class DrawTargetSkia;
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class SnapshotLock;
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class SourceSurfaceSkia : public DataSourceSurface {
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public:
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MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceSkia, override)
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SourceSurfaceSkia();
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virtual ~SourceSurfaceSkia();
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SurfaceType GetType() const override { return SurfaceType::SKIA; }
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IntSize GetSize() const override;
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SurfaceFormat GetFormat() const override;
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void GiveSurface(SkSurface* aSurface);
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sk_sp<SkImage> GetImage(Maybe<MutexAutoLock>* aLock);
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bool InitFromData(unsigned char* aData, const IntSize& aSize, int32_t aStride,
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SurfaceFormat aFormat);
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bool InitFromImage(const sk_sp<SkImage>& aImage,
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SurfaceFormat aFormat = SurfaceFormat::UNKNOWN,
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DrawTargetSkia* aOwner = nullptr);
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already_AddRefed<SourceSurface> ExtractSubrect(const IntRect& aRect) override;
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uint8_t* GetData() override;
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/**
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* The caller is responsible for ensuring aMappedSurface is not null.
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*/
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bool Map(MapType, MappedSurface* aMappedSurface) override;
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void Unmap() override;
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int32_t Stride() override { return mStride; }
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private:
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friend class DrawTargetSkia;
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void DrawTargetWillChange();
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sk_sp<SkImage> mImage;
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// This keeps a surface alive if needed because its DrawTarget has gone away.
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sk_sp<SkSurface> mSurface;
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SurfaceFormat mFormat;
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IntSize mSize;
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int32_t mStride;
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Atomic<DrawTargetSkia*> mDrawTarget;
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Mutex mChangeMutex MOZ_UNANNOTATED;
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bool mIsMapped;
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};
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} // namespace gfx
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} // namespace mozilla
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#endif /* MOZILLA_GFX_SOURCESURFACESKIA_H_ */
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