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diff --git a/gfx/layers/ipc/CompositorManagerParent.h b/gfx/layers/ipc/CompositorManagerParent.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 MOZILLA_GFX_COMPOSITORMANAGERPARENT_H
+#define MOZILLA_GFX_COMPOSITORMANAGERPARENT_H
+
+#include <map>
+#include <stdint.h> // for uint32_t
+#include "mozilla/Attributes.h" // for override
+#include "mozilla/StaticPtr.h" // for StaticRefPtr
+#include "mozilla/StaticMonitor.h" // for StaticMonitor
+#include "mozilla/RefPtr.h" // for already_AddRefed
+#include "mozilla/dom/ipc/IdType.h"
+#include "mozilla/layers/PCompositorManagerParent.h"
+#include "nsTArray.h" // for AutoTArray
+
+namespace mozilla {
+
+namespace gfx {
+class SourceSurfaceSharedData;
+}
+
+namespace layers {
+
+class CompositorBridgeParent;
+class CompositorThreadHolder;
+class RemoteTextureTxnScheduler;
+class SharedSurfacesHolder;
+
+class CompositorManagerParent final : public PCompositorManagerParent {
+ NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorManagerParent, final)
+
+ public:
+ static already_AddRefed<CompositorManagerParent> CreateSameProcess(
+ uint32_t aNamespace);
+ static bool Create(Endpoint<PCompositorManagerParent>&& aEndpoint,
+ dom::ContentParentId aContentId, uint32_t aNamespace,
+ bool aIsRoot);
+ static void Shutdown();
+
+ static already_AddRefed<CompositorBridgeParent>
+ CreateSameProcessWidgetCompositorBridge(CSSToLayoutDeviceScale aScale,
+ const CompositorOptions& aOptions,
+ bool aUseExternalSurfaceSize,
+ const gfx::IntSize& aSurfaceSize,
+ uint64_t aInnerWindowId);
+
+ static void WaitForSharedSurface(const wr::ExternalImageId& aId);
+
+ static void AddSharedSurface(const wr::ExternalImageId& aId,
+ gfx::SourceSurfaceSharedData* aSurface);
+
+ mozilla::ipc::IPCResult RecvAddSharedSurface(const wr::ExternalImageId& aId,
+ SurfaceDescriptorShared&& aDesc);
+ mozilla::ipc::IPCResult RecvRemoveSharedSurface(
+ const wr::ExternalImageId& aId);
+ mozilla::ipc::IPCResult RecvReportSharedSurfacesMemory(
+ ReportSharedSurfacesMemoryResolver&&);
+
+ mozilla::ipc::IPCResult RecvNotifyMemoryPressure();
+
+ mozilla::ipc::IPCResult RecvReportMemory(ReportMemoryResolver&&);
+
+ mozilla::ipc::IPCResult RecvInitCanvasManager(
+ Endpoint<PCanvasManagerParent>&&);
+
+ void BindComplete(bool aIsRoot);
+ void ActorDestroy(ActorDestroyReason aReason) override;
+
+ already_AddRefed<PCompositorBridgeParent> AllocPCompositorBridgeParent(
+ const CompositorBridgeOptions& aOpt);
+
+ static void NotifyWebRenderError(wr::WebRenderError aError);
+
+ const dom::ContentParentId& GetContentId() const { return mContentId; }
+
+ bool OwnsExternalImageId(const wr::ExternalImageId& aId) const {
+ return mNamespace == static_cast<uint32_t>(wr::AsUint64(aId) >> 32);
+ }
+
+ private:
+ static StaticMonitor sMonitor;
+ static StaticRefPtr<CompositorManagerParent> sInstance
+ MOZ_GUARDED_BY(sMonitor);
+
+ // Indexed by namespace.
+ using ManagerMap = std::map<uint32_t, CompositorManagerParent*>;
+ static ManagerMap sManagers MOZ_GUARDED_BY(sMonitor);
+
+ static void ShutdownInternal();
+
+ CompositorManagerParent(dom::ContentParentId aContentId, uint32_t aNamespace);
+ virtual ~CompositorManagerParent();
+
+ void Bind(Endpoint<PCompositorManagerParent>&& aEndpoint, bool aIsRoot);
+
+ void DeferredDestroy();
+
+ RefPtr<CompositorThreadHolder> mCompositorThreadHolder;
+ RefPtr<SharedSurfacesHolder> mSharedSurfacesHolder;
+ AutoTArray<RefPtr<CompositorBridgeParent>, 1> mPendingCompositorBridges;
+ const dom::ContentParentId mContentId;
+ const uint32_t mNamespace;
+ uint32_t mLastSharedSurfaceResourceId MOZ_GUARDED_BY(sMonitor) = 0;
+ RefPtr<RemoteTextureTxnScheduler> mRemoteTextureTxnScheduler;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+#endif