/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=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_GFX_SOURCESURFACESKIA_H_

#define MOZILLA_GFX_SOURCESURFACESKIA_H_

#include "2D.h"

#include <vector>

#include "mozilla/Mutex.h"

#include "skia/include/core/SkCanvas.h"

#include "skia/include/core/SkImage.h"

namespace mozilla {

namespace gfx {

class DrawTargetSkia;

class SnapshotLock;

class SourceSurfaceSkia : public DataSourceSurface

{

public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceSkia, override)

  SourceSurfaceSkia();

  ~SourceSurfaceSkia();

  virtual SurfaceType GetType() const override { return SurfaceType::SKIA; }

  virtual IntSize GetSize() const override;

  virtual SurfaceFormat GetFormat() const override;

  // This is only ever called by the DT destructor, which can only ever happen

  // from one place at a time. Therefore it doesn't need to hold the ChangeMutex

  // as mSurface is never read to directly and is just there to keep the object

  // alive, which itself is refcounted in a thread-safe manner.

  void GiveSurface(sk_sp<SkSurface> &aSurface) { mSurface = aSurface; mDrawTarget = nullptr; }

  sk_sp<SkImage> GetImage();

  bool InitFromData(unsigned char* aData,

                    const IntSize &aSize,

                    int32_t aStride,

                    SurfaceFormat aFormat);

  bool InitFromImage(const sk_sp<SkImage>& aImage,

                     SurfaceFormat aFormat = SurfaceFormat::UNKNOWN,

                     DrawTargetSkia* aOwner = nullptr);

  virtual uint8_t* GetData() override;

  /**

   * The caller is responsible for ensuring aMappedSurface is not null.

   */

  virtual bool Map(MapType, MappedSurface *aMappedSurface) override;

  virtual void Unmap() override;

  virtual int32_t Stride() override { return mStride; }

private:

  friend class DrawTargetSkia;

  void DrawTargetWillChange();

  sk_sp<SkImage> mImage;

  // This keeps a surface alive if needed because its DrawTarget has gone away.

  sk_sp<SkSurface> mSurface;

  SurfaceFormat mFormat;

  IntSize mSize;

  int32_t mStride;

  DrawTargetSkia* mDrawTarget;

  Mutex mChangeMutex;

};

} // namespace gfx

} // namespace mozilla

#endif /* MOZILLA_GFX_SOURCESURFACESKIA_H_ */