gecko/gfx/layers/ipc/CompositorChild.h

123 lines
4.4 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et 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_CompositorChild_h
#define mozilla_layers_CompositorChild_h
#include "base/basictypes.h" // for DISALLOW_EVIL_CONSTRUCTORS
#include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2
#include "mozilla/Attributes.h" // for MOZ_OVERRIDE
#include "mozilla/ipc/ProtocolUtils.h"
#include "mozilla/layers/PCompositorChild.h"
#include "nsAutoPtr.h" // for nsRefPtr
#include "nsClassHashtable.h" // for nsClassHashtable
#include "nsCOMPtr.h" // for nsCOMPtr
#include "nsHashKeys.h" // for nsUint64HashKey
#include "nsISupportsImpl.h" // for NS_INLINE_DECL_REFCOUNTING
class nsIObserver;
namespace mozilla {
namespace layers {
class ClientLayerManager;
class CompositorParent;
class FrameMetrics;
class CompositorChild MOZ_FINAL : public PCompositorChild
{
NS_INLINE_DECL_REFCOUNTING(CompositorChild)
public:
CompositorChild(ClientLayerManager *aLayerManager);
void Destroy();
/**
* Lookup the FrameMetrics shared by the compositor process with the
* associated FrameMetrics::ViewID. The returned FrameMetrics is used
* in progressive paint calculations.
*/
bool LookupCompositorFrameMetrics(const FrameMetrics::ViewID aId, FrameMetrics&);
/**
* We're asked to create a new Compositor in response to an Opens()
* or Bridge() request from our parent process. The Transport is to
* the compositor's context.
*/
static PCompositorChild*
Create(Transport* aTransport, ProcessId aOtherProcess);
static CompositorChild* Get();
static bool ChildProcessHasCompositor() { return sCompositor != nullptr; }
virtual bool RecvInvalidateAll() MOZ_OVERRIDE;
virtual bool RecvDidComposite(const uint64_t& aId) MOZ_OVERRIDE;
private:
// Private destructor, to discourage deletion outside of Release():
virtual ~CompositorChild();
virtual PLayerTransactionChild*
AllocPLayerTransactionChild(const nsTArray<LayersBackend>& aBackendHints,
const uint64_t& aId,
TextureFactoryIdentifier* aTextureFactoryIdentifier,
bool* aSuccess) MOZ_OVERRIDE;
virtual bool DeallocPLayerTransactionChild(PLayerTransactionChild *aChild) MOZ_OVERRIDE;
virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
virtual bool RecvSharedCompositorFrameMetrics(const mozilla::ipc::SharedMemoryBasic::Handle& metrics,
const CrossProcessMutexHandle& handle,
const uint32_t& aAPZCId) MOZ_OVERRIDE;
virtual bool RecvReleaseSharedCompositorFrameMetrics(const ViewID& aId,
const uint32_t& aAPZCId) MOZ_OVERRIDE;
// Class used to store the shared FrameMetrics, mutex, and APZCId in a hash table
class SharedFrameMetricsData {
public:
SharedFrameMetricsData(
const mozilla::ipc::SharedMemoryBasic::Handle& metrics,
const CrossProcessMutexHandle& handle,
const uint32_t& aAPZCId);
~SharedFrameMetricsData();
void CopyFrameMetrics(FrameMetrics* aFrame);
FrameMetrics::ViewID GetViewID();
uint32_t GetAPZCId();
private:
// Pointer to the class that allows access to the shared memory that contains
// the shared FrameMetrics
mozilla::ipc::SharedMemoryBasic* mBuffer;
CrossProcessMutex* mMutex;
// Unique ID of the APZC that is sharing the FrameMetrics
uint32_t mAPZCId;
};
nsRefPtr<ClientLayerManager> mLayerManager;
// The ViewID of the FrameMetrics is used as the key for this hash table.
// While this should be safe to use since the ViewID is unique
nsClassHashtable<nsUint64HashKey, SharedFrameMetricsData> mFrameMetricsTable;
// When we're in a child process, this is the process-global
// compositor that we use to forward transactions directly to the
// compositor context in another process.
static CompositorChild* sCompositor;
DISALLOW_EVIL_CONSTRUCTORS(CompositorChild);
};
} // layers
} // mozilla
#endif // mozilla_layers_CompositorChild_h