1 files changed, 119 insertions, 0 deletions
diff --git a/gfx/layers/ipc/CompositorManagerChild.h b/gfx/layers/ipc/CompositorManagerChild.h
new file mode 100644
index 0000000000..f92ebde460
--- /dev/null
+++ b/gfx/layers/ipc/CompositorManagerChild.h
@@ -0,0 +1,119 @@
+/* -*- 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/Atomics.h"
+#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 CompositorBridgeChild;
+class CompositorManagerParent;
+class WebRenderLayerManager;
+
+class CompositorManagerChild : public PCompositorManagerChild {
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(CompositorManagerChild, override)
+
+ 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, WebRenderLayerManager* aLayerManager,
+      uint32_t aNamespace, CSSToLayoutDeviceScale aScale,
+      const CompositorOptions& aOptions, bool aUseExternalSurfaceSize,
+      const gfx::IntSize& aSurfaceSize, uint64_t aInnerWindowId);
+
+  static already_AddRefed<CompositorBridgeChild>
+  CreateSameProcessWidgetCompositorBridge(WebRenderLayerManager* aLayerManager,
+                                          uint32_t aNamespace);
+
+  static CompositorManagerChild* GetInstance() {
+    MOZ_ASSERT(NS_IsMainThread());
+    return sInstance;
+  }
+
+  // Threadsafe way to get the compositor process ID.
+  static base::ProcessId GetOtherPid() { return sOtherPid; }
+
+  bool CanSend() const {
+    MOZ_ASSERT(NS_IsMainThread());
+    return mCanSend;
+  }
+
+  bool SameProcess() const {
+    MOZ_ASSERT(NS_IsMainThread());
+    return mSameProcess;
+  }
+
+  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) override;
+
+  void ProcessingError(Result aCode, const char* aReason) override;
+
+  bool ShouldContinueFromReplyTimeout() override;
+
+  mozilla::ipc::IPCResult RecvNotifyWebRenderError(
+      const WebRenderError&& aError);
+
+ private:
+  static StaticRefPtr<CompositorManagerChild> sInstance;
+  static Atomic<base::ProcessId> sOtherPid;
+
+  CompositorManagerChild(CompositorManagerParent* aParent,
+                         uint64_t aProcessToken, uint32_t aNamespace);
+
+  CompositorManagerChild(Endpoint<PCompositorManagerChild>&& aEndpoint,
+                         uint64_t aProcessToken, uint32_t aNamespace);
+
+  virtual ~CompositorManagerChild() = default;
+
+  void SetReplyTimeout();
+
+  uint64_t mProcessToken;
+  uint32_t mNamespace;
+  uint32_t mResourceId;
+  bool mCanSend;
+  bool mSameProcess;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif