/* -*- 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 GFX_CanvasLayerComposite_H

#define GFX_CanvasLayerComposite_H

#include "Layers.h"                     // for CanvasLayer, etc

#include "mozilla/Attributes.h"         // for override

#include "mozilla/RefPtr.h"             // for RefPtr

#include "mozilla/layers/LayerManagerComposite.h"  // for LayerComposite, etc

#include "mozilla/layers/LayersTypes.h"  // for LayerRenderState, etc

#include "nsRect.h"                     // for mozilla::gfx::IntRect

#include "nscore.h"                     // for nsACString

namespace mozilla {

namespace layers {

class CompositableHost;

// Canvas layers use ImageHosts (but CanvasClients) because compositing a

// canvas is identical to compositing an image.

class ImageHost;

class CanvasLayerComposite : public CanvasLayer,

                             public LayerComposite

{

public:

  explicit CanvasLayerComposite(LayerManagerComposite* aManager);

protected:

  virtual ~CanvasLayerComposite();

public:

  virtual bool SetCompositableHost(CompositableHost* aHost) override;

  virtual void Disconnect() override

  {

    Destroy();

  }

  virtual void SetLayerManager(HostLayerManager* aManager) override;

  virtual Layer* GetLayer() override;

  virtual void RenderLayer(const gfx::IntRect& aClipRect,

                           const Maybe<gfx::Polygon>& aGeometry) override;

  virtual void CleanupResources() override;

  virtual void GenEffectChain(EffectChain& aEffect) override;

  CompositableHost* GetCompositableHost() override;

  virtual HostLayer* AsHostLayer() override { return this; }

  virtual const char* Name() const override { return "CanvasLayerComposite"; }

protected:

  CanvasRenderer* CreateCanvasRendererInternal() override {

    MOZ_CRASH("Incompatible surface type");

    return nullptr;

  }

  virtual void PrintInfo(std::stringstream& aStream, const char* aPrefix) override;

private:

  gfx::SamplingFilter GetSamplingFilter();

private:

  RefPtr<CompositableHost> mCompositableHost;

};

} // namespace layers

} // namespace mozilla

#endif /* GFX_CanvasLayerComposite_H */