/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * 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 GFX_D3DSURFACEIMAGE_H
#define GFX_D3DSURFACEIMAGE_H

#include "mozilla/RefPtr.h"
#include "ImageContainer.h"
#include "nsAutoPtr.h"
#include "d3d9.h"
#include "mozilla/layers/TextureClientRecycleAllocator.h"

namespace mozilla {
namespace layers {

class SharedTextureClientD3D9;

class D3D9RecycleAllocator : public TextureClientRecycleAllocator
{
public:
  explicit D3D9RecycleAllocator(ISurfaceAllocator* aAllocator,
                                IDirect3DDevice9* aDevice)
    : TextureClientRecycleAllocator(aAllocator)
    , mDevice(aDevice)
  {}

  already_AddRefed<SharedTextureClientD3D9>
  CreateOrRecycleClient(gfx::SurfaceFormat aFormat,
                        const gfx::IntSize& aSize);

protected:
  virtual already_AddRefed<TextureClient>
  Allocate(gfx::SurfaceFormat aFormat,
           gfx::IntSize aSize,
           BackendSelector aSelector,
           TextureFlags aTextureFlags,
           TextureAllocationFlags aAllocFlags) override;

  RefPtr<IDirect3DDevice9> mDevice;
};

// Image class that wraps a IDirect3DSurface9. This class copies the image
// passed into SetData(), so that it can be accessed from other D3D devices.
// This class also manages the synchronization of the copy, to ensure the
// resource is ready to use.
class D3D9SurfaceImage : public Image {
public:

  struct Data {
    Data(IDirect3DSurface9* aSurface,
         const gfx::IntRect& aRegion,
         D3D9RecycleAllocator* aAllocator,
         bool aIsFirstFrame)
      : mSurface(aSurface)
      , mRegion(aRegion)
      , mAllocator(aAllocator)
      , mIsFirstFrame(aIsFirstFrame)
    {}

    RefPtr<IDirect3DSurface9> mSurface;
    gfx::IntRect mRegion;
    RefPtr<D3D9RecycleAllocator> mAllocator;
    bool mIsFirstFrame;
  };

  D3D9SurfaceImage();
  virtual ~D3D9SurfaceImage();

  // Copies the surface into a sharable texture's surface, and initializes
  // the image.
  HRESULT SetData(const Data& aData);

  // Returns the description of the shared surface.
  const D3DSURFACE_DESC& GetDesc() const;

  gfx::IntSize GetSize() override;

  virtual already_AddRefed<gfx::SourceSurface> GetAsSourceSurface() override;

  virtual TextureClient* GetTextureClient(CompositableClient* aClient) override;

  virtual bool IsValid() override;

private:

  // Blocks the calling thread until the copy operation started in SetData()
  // is complete, whereupon the texture is safe to use.
  void EnsureSynchronized();

  gfx::IntSize mSize;
  RefPtr<IDirect3DQuery9> mQuery;
  RefPtr<SharedTextureClientD3D9> mTextureClient;
  bool mValid;
  bool mIsFirstFrame;
};

} // namepace layers
} // namespace mozilla

#endif // GFX_D3DSURFACEIMAGE_H