/* -*- 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_COMPOSITORMANAGERCHILD_H

#define MOZILLA_GFX_COMPOSITORMANAGERCHILD_H

#include <stddef.h>                     // for size_t

#include <stdint.h>                     // for uint32_t, uint64_t

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

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

#include "mozilla/StaticPtr.h"          // for StaticRefPtr

#include "mozilla/layers/PCompositorManagerChild.h"

namespace mozilla {

namespace layers {

class CompositorManagerParent;

class LayerManager;

class CompositorManagerChild : public PCompositorManagerChild

{

  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorManagerChild)

public:

  static bool IsInitialized(uint64_t aProcessToken);

  static void InitSameProcess(uint32_t aNamespace, uint64_t aProcessToken);

  static bool Init(Endpoint<PCompositorManagerChild>&& aEndpoint,

                   uint32_t aNamespace,

                   uint64_t aProcessToken = 0);

  static void Shutdown();

  static void OnGPUProcessLost(uint64_t aProcessToken);

  static bool

  CreateContentCompositorBridge(uint32_t aNamespace);

  static already_AddRefed<CompositorBridgeChild>

  CreateWidgetCompositorBridge(uint64_t aProcessToken,

                               LayerManager* aLayerManager,

                               uint32_t aNamespace,

                               CSSToLayoutDeviceScale aScale,

                               const CompositorOptions& aOptions,

                               bool aUseExternalSurfaceSize,

                               const gfx::IntSize& aSurfaceSize);

  static already_AddRefed<CompositorBridgeChild>

  CreateSameProcessWidgetCompositorBridge(LayerManager* aLayerManager,

                                          uint32_t aNamespace);

  static CompositorManagerChild* GetInstance()

  {

    MOZ_ASSERT(NS_IsMainThread());

    return sInstance;

  }

  bool CanSend() const

  {

    MOZ_ASSERT(NS_IsMainThread());

    return mCanSend;

  }

  uint32_t GetNextResourceId()

  {

    MOZ_ASSERT(NS_IsMainThread());

    return ++mResourceId;

  }

  uint32_t GetNamespace() const

  {

    return mNamespace;

  }

  bool OwnsExternalImageId(const wr::ExternalImageId& aId) const

  {

    return mNamespace == static_cast<uint32_t>(wr::AsUint64(aId) >> 32);

  }

  wr::ExternalImageId GetNextExternalImageId()

  {

    uint64_t id = GetNextResourceId();

    MOZ_RELEASE_ASSERT(id != 0);

    id |= (static_cast<uint64_t>(mNamespace) << 32);

    return wr::ToExternalImageId(id);

  }

  void ActorDestroy(ActorDestroyReason aReason) override;

  void HandleFatalError(const char* aMsg) const override;

  void ProcessingError(Result aCode, const char* aReason) override;

  PCompositorBridgeChild* AllocPCompositorBridgeChild(const CompositorBridgeOptions& aOptions) override;

  bool DeallocPCompositorBridgeChild(PCompositorBridgeChild* aActor) override;

  bool ShouldContinueFromReplyTimeout() override;

private:

  static StaticRefPtr<CompositorManagerChild> sInstance;

  CompositorManagerChild(CompositorManagerParent* aParent,

                         uint64_t aProcessToken,

                         uint32_t aNamespace);

  CompositorManagerChild(Endpoint<PCompositorManagerChild>&& aEndpoint,

                         uint64_t aProcessToken,

                         uint32_t aNamespace);

  ~CompositorManagerChild() override

  {

  }

  void DeallocPCompositorManagerChild() override;

  already_AddRefed<nsIEventTarget>

  GetSpecificMessageEventTarget(const Message& aMsg) override;

  void SetReplyTimeout();

  uint64_t mProcessToken;

  uint32_t mNamespace;

  uint32_t mResourceId;

  bool mCanSend;

};

} // namespace layers

} // namespace mozilla

#endif