gecko-dev/gfx/2d/SourceSurfaceD2D1.h

/* -*- 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_SOURCESURFACED2D1_H_
#define MOZILLA_GFX_SOURCESURFACED2D1_H_

#include "2D.h"
#include "HelpersD2D.h"
#include <vector>
#include <d3d11.h>
#include <d2d1_1.h>

namespace mozilla {
namespace gfx {

class DrawTargetD2D1;

class SourceSurfaceD2D1 : public SourceSurface {
 public:
  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(SourceSurfaceD2D1, override)

  SourceSurfaceD2D1(ID2D1Image* aImage, ID2D1DeviceContext* aDC,
                    SurfaceFormat aFormat, const IntSize& aSize,
                    DrawTargetD2D1* aDT = nullptr);
  ~SourceSurfaceD2D1();

  SurfaceType GetType() const override { return SurfaceType::D2D1_1_IMAGE; }
  IntSize GetSize() const override { return mSize; }
  SurfaceFormat GetFormat() const override { return mFormat; }
  bool IsValid() const override;
  already_AddRefed<DataSourceSurface> GetDataSurface() override;

  ID2D1Image* GetImage() { return mImage; }

  void EnsureIndependent() {
    if (!mDrawTarget) return;
    DrawTargetWillChange();
  }

 private:
  friend class DrawTargetD2D1;

  bool EnsureRealizedBitmap();

  // This function is called by the draw target this texture belongs to when
  // it is about to be changed. The texture will be required to make a copy
  // of itself when this happens.
  void DrawTargetWillChange();

  // This will mark the surface as no longer depending on its drawtarget,
  // this may happen on destruction or copying.
  void MarkIndependent();

  RefPtr<ID2D1Image> mImage;
  // This may be null if we were created for a non-bitmap image and have not
  // had a reason yet to realize ourselves.
  RefPtr<ID2D1Bitmap1> mRealizedBitmap;
  RefPtr<ID2D1DeviceContext> mDC;
  // Keep this around to verify whether out image is still valid in the future.
  RefPtr<ID2D1Device> mDevice;

  SurfaceFormat mFormat;
  IntSize mSize;
  DrawTargetD2D1* mDrawTarget;
  std::shared_ptr<Mutex> mSnapshotLock;
};

class DataSourceSurfaceD2D1 : public DataSourceSurface {
 public:
  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DataSourceSurfaceD2D1, override)

  DataSourceSurfaceD2D1(ID2D1Bitmap1* aMappableBitmap, SurfaceFormat aFormat);
  ~DataSourceSurfaceD2D1();

  SurfaceType GetType() const override { return SurfaceType::DATA; }
  IntSize GetSize() const override;
  SurfaceFormat GetFormat() const override { return mFormat; }
  bool IsValid() const override { return !!mBitmap; }
  uint8_t* GetData() override;
  int32_t Stride() override;
  bool Map(MapType, MappedSurface* aMappedSurface) override;
  void Unmap() override;

 private:
  friend class SourceSurfaceD2DTarget;
  void EnsureMapped();

  mutable RefPtr<ID2D1Bitmap1> mBitmap;
  SurfaceFormat mFormat;
  D2D1_MAPPED_RECT mMap;
  bool mIsMapped;
  bool mImplicitMapped;
};

}  // namespace gfx
}  // namespace mozilla

#endif /* MOZILLA_GFX_SOURCESURFACED2D2TARGET_H_ */