tor-browser

The Tor Browser
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SourceSurfaceSkia.h (2148B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef MOZILLA_GFX_SOURCESURFACESKIA_H_
      8 #define MOZILLA_GFX_SOURCESURFACESKIA_H_
      9 
     10 #include "2D.h"
     11 #include "mozilla/Mutex.h"
     12 #include "skia/include/core/SkRefCnt.h"
     13 
     14 class SkImage;
     15 class SkSurface;
     16 
     17 namespace mozilla {
     18 
     19 namespace gfx {
     20 
     21 class DrawTargetSkia;
     22 class SnapshotLock;
     23 
     24 class SourceSurfaceSkia : public DataSourceSurface {
     25 public:
     26  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceSkia, override)
     27 
     28  SourceSurfaceSkia();
     29  virtual ~SourceSurfaceSkia();
     30 
     31  SurfaceType GetType() const override { return SurfaceType::SKIA; }
     32  IntSize GetSize() const override;
     33  SurfaceFormat GetFormat() const override;
     34 
     35  void GiveSurface(SkSurface* aSurface);
     36 
     37  sk_sp<SkImage> GetImage(Maybe<MutexAutoLock>* aLock);
     38 
     39  bool InitFromData(unsigned char* aData, const IntSize& aSize, int32_t aStride,
     40                    SurfaceFormat aFormat);
     41 
     42  bool InitFromImage(const sk_sp<SkImage>& aImage,
     43                     SurfaceFormat aFormat = SurfaceFormat::UNKNOWN,
     44                     DrawTargetSkia* aOwner = nullptr);
     45 
     46  already_AddRefed<SourceSurface> ExtractSubrect(const IntRect& aRect) override;
     47 
     48  uint8_t* GetData() override;
     49 
     50  /**
     51   * The caller is responsible for ensuring aMappedSurface is not null.
     52   */
     53  bool Map(MapType, MappedSurface* aMappedSurface) override;
     54 
     55  void Unmap() override;
     56 
     57  int32_t Stride() override { return mStride; }
     58 
     59 private:
     60  friend class DrawTargetSkia;
     61 
     62  void DrawTargetWillChange();
     63 
     64  sk_sp<SkImage> mImage;
     65  // This keeps a surface alive if needed because its DrawTarget has gone away.
     66  sk_sp<SkSurface> mSurface;
     67  SurfaceFormat mFormat;
     68  IntSize mSize;
     69  int32_t mStride;
     70  Atomic<DrawTargetSkia*> mDrawTarget;
     71  Mutex mChangeMutex MOZ_UNANNOTATED;
     72  bool mIsMapped;
     73 };
     74 
     75 }  // namespace gfx
     76 }  // namespace mozilla
     77 
     78 #endif /* MOZILLA_GFX_SOURCESURFACESKIA_H_ */