1 files changed, 151 insertions, 0 deletions
diff --git a/gfx/layers/ipc/ImageBridgeParent.h b/gfx/layers/ipc/ImageBridgeParent.h
new file mode 100644
index 0000000000..7f2c7ce4ce
--- /dev/null
+++ b/gfx/layers/ipc/ImageBridgeParent.h
@@ -0,0 +1,151 @@
+/* -*- 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;
+
+/**
+ * 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;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // gfx_layers_ipc_ImageBridgeParent_h_