1 files changed, 262 insertions, 0 deletions
diff --git a/gfx/layers/wr/WebRenderBridgeChild.h b/gfx/layers/wr/WebRenderBridgeChild.h
new file mode 100644
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+++ b/gfx/layers/wr/WebRenderBridgeChild.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_layers_WebRenderBridgeChild_h
+#define mozilla_layers_WebRenderBridgeChild_h
+
+#include "mozilla/layers/CompositableForwarder.h"
+#include "mozilla/layers/PWebRenderBridgeChild.h"
+
+namespace mozilla {
+
+namespace widget {
+class CompositorWidget;
+}
+
+namespace wr {
+class DisplayListBuilder;
+class ResourceUpdateQueue;
+class IpcResourceUpdateQueue;
+}  // namespace wr
+
+namespace layers {
+
+class CompositableClient;
+class CompositorBridgeChild;
+class StackingContextHelper;
+class TextureForwarder;
+class WebRenderLayerManager;
+
+template <class T>
+class ThreadSafeWeakPtrHashKey : public PLDHashEntryHdr {
+ public:
+  typedef RefPtr<T> KeyType;
+  typedef const T* KeyTypePointer;
+
+  explicit ThreadSafeWeakPtrHashKey(KeyTypePointer aKey)
+      : mKey(do_AddRef(const_cast<T*>(aKey))) {}
+
+  KeyType GetKey() const { return do_AddRef(mKey); }
+  bool KeyEquals(KeyTypePointer aKey) const { return mKey == aKey; }
+
+  static KeyTypePointer KeyToPointer(const KeyType& aKey) { return aKey.get(); }
+  static PLDHashNumber HashKey(KeyTypePointer aKey) {
+    return NS_PTR_TO_UINT32(aKey) >> 2;
+  }
+  enum { ALLOW_MEMMOVE = true };
+
+ private:
+  ThreadSafeWeakPtr<T> mKey;
+};
+
+typedef ThreadSafeWeakPtrHashKey<gfx::UnscaledFont> UnscaledFontHashKey;
+typedef ThreadSafeWeakPtrHashKey<gfx::ScaledFont> ScaledFontHashKey;
+
+class WebRenderBridgeChild final : public PWebRenderBridgeChild,
+                                   public CompositableForwarder {
+  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WebRenderBridgeChild, override)
+
+  friend class PWebRenderBridgeChild;
+
+ public:
+  explicit WebRenderBridgeChild(const wr::PipelineId& aPipelineId);
+
+  void AddWebRenderParentCommand(const WebRenderParentCommand& aCmd);
+  bool HasWebRenderParentCommands() { return !mParentCommands.IsEmpty(); }
+
+  void UpdateResources(wr::IpcResourceUpdateQueue& aResources);
+  void BeginTransaction();
+  bool EndTransaction(DisplayListData&& aDisplayListData,
+                      TransactionId aTransactionId, bool aContainsSVGroup,
+                      const mozilla::VsyncId& aVsyncId,
+                      const mozilla::TimeStamp& aVsyncStartTime,
+                      const mozilla::TimeStamp& aRefreshStartTime,
+                      const mozilla::TimeStamp& aTxnStartTime,
+                      const nsCString& aTxtURL);
+  void EndEmptyTransaction(const FocusTarget& aFocusTarget,
+                           Maybe<TransactionData>&& aTransactionData,
+                           TransactionId aTransactionId,
+                           const mozilla::VsyncId& aVsyncId,
+                           const mozilla::TimeStamp& aVsyncStartTime,
+                           const mozilla::TimeStamp& aRefreshStartTime,
+                           const mozilla::TimeStamp& aTxnStartTime,
+                           const nsCString& aTxtURL);
+  void ProcessWebRenderParentCommands();
+
+  CompositorBridgeChild* GetCompositorBridgeChild();
+
+  wr::PipelineId GetPipeline() { return mPipelineId; }
+
+  // KnowsCompositor
+  TextureForwarder* GetTextureForwarder() override;
+  LayersIPCActor* GetLayersIPCActor() override;
+  void SyncWithCompositor() override;
+  ActiveResourceTracker* GetActiveResourceTracker() override {
+    return mActiveResourceTracker.get();
+  }
+
+  void AddPipelineIdForAsyncCompositable(const wr::PipelineId& aPipelineId,
+                                         const CompositableHandle& aHandlee);
+  void AddPipelineIdForCompositable(const wr::PipelineId& aPipelineId,
+                                    const CompositableHandle& aHandlee);
+  void RemovePipelineIdForCompositable(const wr::PipelineId& aPipelineId);
+
+  /// Release TextureClient that is bounded to ImageKey.
+  /// It is used for recycling TextureClient.
+  void ReleaseTextureOfImage(const wr::ImageKey& aKey);
+
+  /**
+   * Clean this up, finishing with SendShutDown() which will cause __delete__
+   * to be sent from the parent side.
+   */
+  void Destroy(bool aIsSync);
+  bool IPCOpen() const { return mIPCOpen && !mDestroyed; }
+  bool GetSentDisplayList() const { return mSentDisplayList; }
+  bool IsDestroyed() const { return mDestroyed; }
+
+  uint32_t GetNextResourceId() { return ++mResourceId; }
+  wr::IdNamespace GetNamespace() { return mIdNamespace; }
+  void SetNamespace(wr::IdNamespace aIdNamespace) {
+    mIdNamespace = aIdNamespace;
+  }
+
+  wr::FontKey GetNextFontKey() {
+    return wr::FontKey{GetNamespace(), GetNextResourceId()};
+  }
+
+  wr::FontInstanceKey GetNextFontInstanceKey() {
+    return wr::FontInstanceKey{GetNamespace(), GetNextResourceId()};
+  }
+
+  wr::WrImageKey GetNextImageKey() {
+    return wr::WrImageKey{GetNamespace(), GetNextResourceId()};
+  }
+
+  void PushGlyphs(wr::DisplayListBuilder& aBuilder,
+                  Range<const wr::GlyphInstance> aGlyphs,
+                  gfx::ScaledFont* aFont, const wr::ColorF& aColor,
+                  const StackingContextHelper& aSc,
+                  const wr::LayoutRect& aBounds, const wr::LayoutRect& aClip,
+                  bool aBackfaceVisible,
+                  const wr::GlyphOptions* aGlyphOptions = nullptr);
+
+  Maybe<wr::FontInstanceKey> GetFontKeyForScaledFont(
+      gfx::ScaledFont* aScaledFont,
+      wr::IpcResourceUpdateQueue* aResources = nullptr);
+  Maybe<wr::FontKey> GetFontKeyForUnscaledFont(
+      gfx::UnscaledFont* aUnscaledFont,
+      wr::IpcResourceUpdateQueue* aResources = nullptr);
+  void RemoveExpiredFontKeys(wr::IpcResourceUpdateQueue& aResources);
+
+  void BeginClearCachedResources();
+  void EndClearCachedResources();
+
+  void SetWebRenderLayerManager(WebRenderLayerManager* aManager);
+
+  mozilla::ipc::IShmemAllocator* GetShmemAllocator();
+
+  bool IsThreadSafe() const override { return false; }
+
+  RefPtr<KnowsCompositor> GetForMedia() override;
+
+  /// Alloc a specific type of shmem that is intended for use in
+  /// IpcResourceUpdateQueue only, and cache at most one of them,
+  /// when called multiple times.
+  ///
+  /// Do not use this for anything else.
+  bool AllocResourceShmem(size_t aSize, RefCountedShmem& aShm);
+  /// Dealloc shared memory that was allocated with AllocResourceShmem.
+  ///
+  /// Do not use this for anything else.
+  void DeallocResourceShmem(RefCountedShmem& aShm);
+
+  void Capture();
+  void ToggleCaptureSequence();
+
+ private:
+  friend class CompositorBridgeChild;
+
+  ~WebRenderBridgeChild();
+
+  wr::ExternalImageId GetNextExternalImageId();
+
+  // CompositableForwarder
+  void Connect(CompositableClient* aCompositable,
+               ImageContainer* aImageContainer = nullptr) override;
+  void UseTiledLayerBuffer(
+      CompositableClient* aCompositable,
+      const SurfaceDescriptorTiles& aTiledDescriptor) override;
+  void UpdateTextureRegion(CompositableClient* aCompositable,
+                           const ThebesBufferData& aThebesBufferData,
+                           const nsIntRegion& aUpdatedRegion) override;
+  void ReleaseCompositable(const CompositableHandle& aHandle) override;
+  bool DestroyInTransaction(PTextureChild* aTexture) override;
+  bool DestroyInTransaction(const CompositableHandle& aHandle);
+  void RemoveTextureFromCompositable(CompositableClient* aCompositable,
+                                     TextureClient* aTexture) override;
+  void UseTextures(CompositableClient* aCompositable,
+                   const nsTArray<TimedTextureClient>& aTextures) override;
+  void UseComponentAlphaTextures(CompositableClient* aCompositable,
+                                 TextureClient* aClientOnBlack,
+                                 TextureClient* aClientOnWhite) override;
+  void UpdateFwdTransactionId() override;
+  uint64_t GetFwdTransactionId() override;
+  bool InForwarderThread() override;
+
+  void ActorDestroy(ActorDestroyReason why) override;
+
+  void DoDestroy();
+
+  mozilla::ipc::IPCResult RecvWrUpdated(
+      const wr::IdNamespace& aNewIdNamespace,
+      const TextureFactoryIdentifier& textureFactoryIdentifier);
+  mozilla::ipc::IPCResult RecvWrReleasedImages(
+      nsTArray<wr::ExternalImageKeyPair>&& aPairs);
+
+  void AddIPDLReference() {
+    MOZ_ASSERT(mIPCOpen == false);
+    mIPCOpen = true;
+    AddRef();
+  }
+  void ReleaseIPDLReference() {
+    MOZ_ASSERT(mIPCOpen == true);
+    mIPCOpen = false;
+    Release();
+  }
+
+  bool AddOpDestroy(const OpDestroy& aOp);
+
+  nsTArray<OpDestroy> mDestroyedActors;
+  nsTArray<WebRenderParentCommand> mParentCommands;
+  nsDataHashtable<nsUint64HashKey, CompositableClient*> mCompositables;
+  bool mIsInTransaction;
+  bool mIsInClearCachedResources;
+  wr::IdNamespace mIdNamespace;
+  uint32_t mResourceId;
+  wr::PipelineId mPipelineId;
+  WebRenderLayerManager* mManager;
+
+  bool mIPCOpen;
+  bool mDestroyed;
+  // True iff we have called SendSetDisplayList and haven't called
+  // SendClearCachedResources since that call.
+  bool mSentDisplayList;
+
+  uint32_t mFontKeysDeleted;
+  nsDataHashtable<UnscaledFontHashKey, wr::FontKey> mFontKeys;
+
+  uint32_t mFontInstanceKeysDeleted;
+  nsDataHashtable<ScaledFontHashKey, wr::FontInstanceKey> mFontInstanceKeys;
+
+  UniquePtr<ActiveResourceTracker> mActiveResourceTracker;
+
+  RefCountedShmem mResourceShm;
+};
+
+}  // namespace layers
+}  // namespace mozilla
+
+#endif  // mozilla_layers_WebRenderBridgeChild_h