1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/layers/ipc/CompositorChild.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,122 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim: set sw=2 ts=8 et tw=80 : */
1.6 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.7 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.8 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.9 +
1.10 +#ifndef mozilla_layers_CompositorChild_h
1.11 +#define mozilla_layers_CompositorChild_h
1.12 +
1.13 +#include "base/basictypes.h" // for DISALLOW_EVIL_CONSTRUCTORS
1.14 +#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
1.15 +#include "mozilla/Attributes.h" // for MOZ_OVERRIDE
1.16 +#include "mozilla/ipc/ProtocolUtils.h"
1.17 +#include "mozilla/layers/PCompositorChild.h"
1.18 +#include "nsAutoPtr.h" // for nsRefPtr
1.19 +#include "nsClassHashtable.h" // for nsClassHashtable
1.20 +#include "nsCOMPtr.h" // for nsCOMPtr
1.21 +#include "nsHashKeys.h" // for nsUint64HashKey
1.22 +#include "nsISupportsImpl.h" // for NS_INLINE_DECL_REFCOUNTING
1.23 +
1.24 +class nsIObserver;
1.25 +
1.26 +namespace mozilla {
1.27 +namespace layers {
1.28 +
1.29 +class ClientLayerManager;
1.30 +class CompositorParent;
1.31 +class FrameMetrics;
1.32 +
1.33 +class CompositorChild MOZ_FINAL : public PCompositorChild
1.34 +{
1.35 + NS_INLINE_DECL_REFCOUNTING(CompositorChild)
1.36 +public:
1.37 + CompositorChild(ClientLayerManager *aLayerManager);
1.38 +
1.39 + void Destroy();
1.40 +
1.41 + /**
1.42 + * Lookup the FrameMetrics shared by the compositor process with the
1.43 + * associated FrameMetrics::ViewID. The returned FrameMetrics is used
1.44 + * in progressive paint calculations.
1.45 + */
1.46 + bool LookupCompositorFrameMetrics(const FrameMetrics::ViewID aId, FrameMetrics&);
1.47 +
1.48 + /**
1.49 + * We're asked to create a new Compositor in response to an Opens()
1.50 + * or Bridge() request from our parent process. The Transport is to
1.51 + * the compositor's context.
1.52 + */
1.53 + static PCompositorChild*
1.54 + Create(Transport* aTransport, ProcessId aOtherProcess);
1.55 +
1.56 + static CompositorChild* Get();
1.57 +
1.58 + static bool ChildProcessHasCompositor() { return sCompositor != nullptr; }
1.59 +
1.60 + virtual bool RecvInvalidateAll() MOZ_OVERRIDE;
1.61 +
1.62 + virtual bool RecvDidComposite(const uint64_t& aId) MOZ_OVERRIDE;
1.63 +
1.64 +private:
1.65 + // Private destructor, to discourage deletion outside of Release():
1.66 + virtual ~CompositorChild();
1.67 +
1.68 + virtual PLayerTransactionChild*
1.69 + AllocPLayerTransactionChild(const nsTArray<LayersBackend>& aBackendHints,
1.70 + const uint64_t& aId,
1.71 + TextureFactoryIdentifier* aTextureFactoryIdentifier,
1.72 + bool* aSuccess) MOZ_OVERRIDE;
1.73 +
1.74 + virtual bool DeallocPLayerTransactionChild(PLayerTransactionChild *aChild) MOZ_OVERRIDE;
1.75 +
1.76 + virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
1.77 +
1.78 + virtual bool RecvSharedCompositorFrameMetrics(const mozilla::ipc::SharedMemoryBasic::Handle& metrics,
1.79 + const CrossProcessMutexHandle& handle,
1.80 + const uint32_t& aAPZCId) MOZ_OVERRIDE;
1.81 +
1.82 + virtual bool RecvReleaseSharedCompositorFrameMetrics(const ViewID& aId,
1.83 + const uint32_t& aAPZCId) MOZ_OVERRIDE;
1.84 +
1.85 + // Class used to store the shared FrameMetrics, mutex, and APZCId in a hash table
1.86 + class SharedFrameMetricsData {
1.87 + public:
1.88 + SharedFrameMetricsData(
1.89 + const mozilla::ipc::SharedMemoryBasic::Handle& metrics,
1.90 + const CrossProcessMutexHandle& handle,
1.91 + const uint32_t& aAPZCId);
1.92 +
1.93 + ~SharedFrameMetricsData();
1.94 +
1.95 + void CopyFrameMetrics(FrameMetrics* aFrame);
1.96 + FrameMetrics::ViewID GetViewID();
1.97 + uint32_t GetAPZCId();
1.98 +
1.99 + private:
1.100 + // Pointer to the class that allows access to the shared memory that contains
1.101 + // the shared FrameMetrics
1.102 + mozilla::ipc::SharedMemoryBasic* mBuffer;
1.103 + CrossProcessMutex* mMutex;
1.104 + // Unique ID of the APZC that is sharing the FrameMetrics
1.105 + uint32_t mAPZCId;
1.106 + };
1.107 +
1.108 + nsRefPtr<ClientLayerManager> mLayerManager;
1.109 +
1.110 + // The ViewID of the FrameMetrics is used as the key for this hash table.
1.111 + // While this should be safe to use since the ViewID is unique
1.112 + nsClassHashtable<nsUint64HashKey, SharedFrameMetricsData> mFrameMetricsTable;
1.113 +
1.114 + // When we're in a child process, this is the process-global
1.115 + // compositor that we use to forward transactions directly to the
1.116 + // compositor context in another process.
1.117 + static CompositorChild* sCompositor;
1.118 +
1.119 + DISALLOW_EVIL_CONSTRUCTORS(CompositorChild);
1.120 +};
1.121 +
1.122 +} // layers
1.123 +} // mozilla
1.124 +
1.125 +#endif // mozilla_layers_CompositorChild_h
