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diff --git a/gfx/layers/ipc/ImageBridgeParent.h b/gfx/layers/ipc/ImageBridgeParent.h
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+/* -*- 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_layers_ipc_ImageBridgeParent_h_
+#define gfx_layers_ipc_ImageBridgeParent_h_
+
+#include <stddef.h> // for size_t
+#include <stdint.h> // for uint32_t, uint64_t
+#include "CompositableTransactionParent.h"
+#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
+#include "mozilla/Attributes.h" // for override
+#include "mozilla/dom/ipc/IdType.h"
+#include "mozilla/ipc/ProtocolUtils.h"
+#include "mozilla/ipc/SharedMemory.h" // for SharedMemory, etc
+#include "mozilla/layers/CompositorThread.h"
+#include "mozilla/layers/PImageBridgeParent.h"
+#include "nsISupportsImpl.h"
+#include "nsTArrayForwardDeclare.h" // for nsTArray
+
+namespace mozilla {
+namespace ipc {
+class Shmem;
+} // namespace ipc
+
+namespace layers {
+
+struct ImageCompositeNotificationInfo;
+class RemoteTextureTxnScheduler;
+
+/**
+ * ImageBridgeParent is the manager Protocol of async Compositables.
+ */
+class ImageBridgeParent final : public PImageBridgeParent,
+ public CompositableParentManager,
+ public mozilla::ipc::IShmemAllocator {
+ public:
+ typedef nsTArray<CompositableOperation> EditArray;
+ typedef nsTArray<OpDestroy> OpDestroyArray;
+
+ protected:
+ ImageBridgeParent(nsISerialEventTarget* aThread, ProcessId aChildProcessId,
+ dom::ContentParentId aContentId);
+
+ public:
+ NS_IMETHOD_(MozExternalRefCountType) AddRef() override {
+ return ISurfaceAllocator::AddRef();
+ }
+ NS_IMETHOD_(MozExternalRefCountType) Release() override {
+ return ISurfaceAllocator::Release();
+ }
+
+ /**
+ * Creates the globals of ImageBridgeParent.
+ */
+ static void Setup();
+
+ static ImageBridgeParent* CreateSameProcess();
+ static bool CreateForGPUProcess(Endpoint<PImageBridgeParent>&& aEndpoint);
+ static bool CreateForContent(Endpoint<PImageBridgeParent>&& aEndpoint,
+ dom::ContentParentId aContentId);
+ static void Shutdown();
+
+ IShmemAllocator* AsShmemAllocator() override { return this; }
+
+ void ActorDestroy(ActorDestroyReason aWhy) override;
+
+ // CompositableParentManager
+ void SendAsyncMessage(
+ const nsTArray<AsyncParentMessageData>& aMessage) override;
+
+ void NotifyNotUsed(PTextureParent* aTexture,
+ uint64_t aTransactionId) override;
+
+ base::ProcessId GetChildProcessId() override { return OtherPid(); }
+ dom::ContentParentId GetContentId() override { return mContentId; }
+
+ // PImageBridge
+ mozilla::ipc::IPCResult RecvUpdate(EditArray&& aEdits,
+ OpDestroyArray&& aToDestroy,
+ const uint64_t& aFwdTransactionId);
+
+ PTextureParent* AllocPTextureParent(
+ const SurfaceDescriptor& aSharedData, ReadLockDescriptor& aReadLock,
+ const LayersBackend& aLayersBackend, const TextureFlags& aFlags,
+ const uint64_t& aSerial,
+ const wr::MaybeExternalImageId& aExternalImageId);
+ bool DeallocPTextureParent(PTextureParent* actor);
+
+ mozilla::ipc::IPCResult RecvNewCompositable(const CompositableHandle& aHandle,
+ const TextureInfo& aInfo);
+ mozilla::ipc::IPCResult RecvReleaseCompositable(
+ const CompositableHandle& aHandle);
+
+ PMediaSystemResourceManagerParent* AllocPMediaSystemResourceManagerParent();
+ bool DeallocPMediaSystemResourceManagerParent(
+ PMediaSystemResourceManagerParent* aActor);
+
+ // Shutdown step 1
+ mozilla::ipc::IPCResult RecvWillClose();
+
+ nsISerialEventTarget* GetThread() const { return mThread; }
+
+ // IShmemAllocator
+
+ bool AllocShmem(size_t aSize, ipc::Shmem* aShmem) override;
+
+ bool AllocUnsafeShmem(size_t aSize, ipc::Shmem* aShmem) override;
+
+ bool DeallocShmem(ipc::Shmem& aShmem) override;
+
+ bool IsSameProcess() const override;
+
+ static already_AddRefed<ImageBridgeParent> GetInstance(ProcessId aId);
+
+ static bool NotifyImageComposites(
+ nsTArray<ImageCompositeNotificationInfo>& aNotifications);
+
+ bool UsesImageBridge() const override { return true; }
+
+ bool IPCOpen() const override { return !mClosed; }
+
+ protected:
+ void Bind(Endpoint<PImageBridgeParent>&& aEndpoint);
+
+ private:
+ virtual ~ImageBridgeParent();
+
+ static void ShutdownInternal();
+
+ void DeferredDestroy();
+ nsCOMPtr<nsISerialEventTarget> mThread;
+
+ dom::ContentParentId mContentId;
+
+ bool mClosed;
+
+ /**
+ * Map of all living ImageBridgeParent instances
+ */
+ typedef std::map<base::ProcessId, ImageBridgeParent*> ImageBridgeMap;
+ static ImageBridgeMap sImageBridges;
+
+ RefPtr<CompositorThreadHolder> mCompositorThreadHolder;
+
+ RefPtr<RemoteTextureTxnScheduler> mRemoteTextureTxnScheduler;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif // gfx_layers_ipc_ImageBridgeParent_h_