gfx/2d/SourceSurfaceSkia.h

   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_ */