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121 lines
4.3 KiB
C++
121 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set sw=2 ts=8 et tw=80 : */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layers_CompositorChild_h
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#define mozilla_layers_CompositorChild_h
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#include "base/basictypes.h" // for DISALLOW_EVIL_CONSTRUCTORS
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#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
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#include "mozilla/Attributes.h" // for MOZ_OVERRIDE
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#include "mozilla/ipc/ProtocolUtils.h"
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#include "mozilla/layers/PCompositorChild.h"
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#include "nsAutoPtr.h" // for nsRefPtr
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#include "nsClassHashtable.h" // for nsClassHashtable
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#include "nsCOMPtr.h" // for nsCOMPtr
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#include "nsHashKeys.h" // for nsUint64HashKey
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#include "nsISupportsImpl.h" // for NS_INLINE_DECL_REFCOUNTING
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class nsIObserver;
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namespace mozilla {
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namespace layers {
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class ClientLayerManager;
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class CompositorParent;
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class FrameMetrics;
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class CompositorChild MOZ_FINAL : public PCompositorChild
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{
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NS_INLINE_DECL_REFCOUNTING(CompositorChild)
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public:
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CompositorChild(ClientLayerManager *aLayerManager);
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void Destroy();
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/**
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* Lookup the FrameMetrics shared by the compositor process with the
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* associated FrameMetrics::ViewID. The returned FrameMetrics is used
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* in progressive paint calculations.
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*/
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bool LookupCompositorFrameMetrics(const FrameMetrics::ViewID aId, FrameMetrics&);
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/**
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* We're asked to create a new Compositor in response to an Opens()
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* or Bridge() request from our parent process. The Transport is to
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* the compositor's context.
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*/
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static PCompositorChild*
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Create(Transport* aTransport, ProcessId aOtherProcess);
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static CompositorChild* Get();
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static bool ChildProcessHasCompositor() { return sCompositor != nullptr; }
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virtual bool RecvInvalidateAll() MOZ_OVERRIDE;
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private:
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// Private destructor, to discourage deletion outside of Release():
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virtual ~CompositorChild();
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virtual PLayerTransactionChild*
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AllocPLayerTransactionChild(const nsTArray<LayersBackend>& aBackendHints,
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const uint64_t& aId,
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TextureFactoryIdentifier* aTextureFactoryIdentifier,
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bool* aSuccess) MOZ_OVERRIDE;
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virtual bool DeallocPLayerTransactionChild(PLayerTransactionChild *aChild) MOZ_OVERRIDE;
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virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
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virtual bool RecvSharedCompositorFrameMetrics(const mozilla::ipc::SharedMemoryBasic::Handle& metrics,
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const CrossProcessMutexHandle& handle,
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const uint32_t& aAPZCId) MOZ_OVERRIDE;
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virtual bool RecvReleaseSharedCompositorFrameMetrics(const ViewID& aId,
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const uint32_t& aAPZCId) MOZ_OVERRIDE;
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// Class used to store the shared FrameMetrics, mutex, and APZCId in a hash table
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class SharedFrameMetricsData {
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public:
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SharedFrameMetricsData(
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const mozilla::ipc::SharedMemoryBasic::Handle& metrics,
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const CrossProcessMutexHandle& handle,
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const uint32_t& aAPZCId);
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~SharedFrameMetricsData();
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void CopyFrameMetrics(FrameMetrics* aFrame);
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FrameMetrics::ViewID GetViewID();
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uint32_t GetAPZCId();
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private:
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// Pointer to the class that allows access to the shared memory that contains
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// the shared FrameMetrics
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mozilla::ipc::SharedMemoryBasic* mBuffer;
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CrossProcessMutex* mMutex;
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// Unique ID of the APZC that is sharing the FrameMetrics
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uint32_t mAPZCId;
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};
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nsRefPtr<ClientLayerManager> mLayerManager;
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// The ViewID of the FrameMetrics is used as the key for this hash table.
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// While this should be safe to use since the ViewID is unique
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nsClassHashtable<nsUint64HashKey, SharedFrameMetricsData> mFrameMetricsTable;
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// When we're in a child process, this is the process-global
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// compositor that we use to forward transactions directly to the
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// compositor context in another process.
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static CompositorChild* sCompositor;
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DISALLOW_EVIL_CONSTRUCTORS(CompositorChild);
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};
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} // layers
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} // mozilla
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#endif // mozilla_layers_CompositorChild_h
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