/* -*- 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:
  bool SetCompositableHost(CompositableHost* aHost) override;

  void Disconnect() override { Destroy(); }

  void SetLayerManager(HostLayerManager* aManager) override;

  Layer* GetLayer() override;
  void RenderLayer(const gfx::IntRect& aClipRect,
                   const Maybe<gfx::Polygon>& aGeometry) override;

  void CleanupResources() override;

  void GenEffectChain(EffectChain& aEffect) override;

  CompositableHost* GetCompositableHost() override;

  HostLayer* AsHostLayer() override { return this; }

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

 protected:
  CanvasRenderer* CreateCanvasRendererInternal() override {
    MOZ_CRASH("Incompatible surface type");
    return nullptr;
  }

  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 */