gecko-dev/gfx/2d/SourceSurfaceDual.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_SOURCESURFACEDUAL_H_
#define MOZILLA_GFX_SOURCESURFACEDUAL_H_
     
#include "2D.h"
     
namespace mozilla {
namespace gfx {

class DualSurface;
class DualPattern;

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

  SourceSurfaceDual(DrawTarget *aDTA, DrawTarget *aDTB)
    : mA(aDTA->Snapshot())
    , mB(aDTB->Snapshot())
  { }

  virtual SurfaceType GetType() const override { return SurfaceType::DUAL_DT; }
  virtual IntSize GetSize() const override { return mA->GetSize(); }
  virtual SurfaceFormat GetFormat() const override { return mA->GetFormat(); }

  // TODO: This is probably wrong as this was originally only
  // used for debugging purposes, but now has legacy relying on
  // giving the first type only.
  virtual already_AddRefed<DataSourceSurface> GetDataSurface() override {
    return mA->GetDataSurface();
  }

  SourceSurface* GetFirstSurface() {
    MOZ_ASSERT(mA->GetType() == mB->GetType());
    return mA;
  }

  bool SameSurfaceTypes() {
    return mA->GetType() == mB->GetType();
  }

private:
  friend class DualSurface;
  friend class DualPattern;

  RefPtr<SourceSurface> mA;
  RefPtr<SourceSurface> mB;
};

} // namespace gfx
} // namespace mozilla

#endif /* MOZILLA_GFX_SOURCESURFACEDUAL_H_ */