gecko/gfx/layers/ipc/CompositorChild.cpp

111 lines
2.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=2 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/. */
#include "CompositorChild.h"
#include "CompositorParent.h"
#include "LayerManagerOGL.h"
#include "mozilla/layers/ShadowLayersChild.h"
using mozilla::layers::ShadowLayersChild;
namespace mozilla {
namespace layers {
/*static*/ CompositorChild* CompositorChild::sCompositor;
CompositorChild::CompositorChild(LayerManager *aLayerManager)
: mLayerManager(aLayerManager)
{
MOZ_COUNT_CTOR(CompositorChild);
}
CompositorChild::~CompositorChild()
{
MOZ_COUNT_DTOR(CompositorChild);
}
void
CompositorChild::Destroy()
{
mLayerManager->Destroy();
mLayerManager = NULL;
while (size_t len = ManagedPLayersChild().Length()) {
ShadowLayersChild* layers =
static_cast<ShadowLayersChild*>(ManagedPLayersChild()[len - 1]);
layers->Destroy();
}
SendStop();
}
/*static*/ PCompositorChild*
CompositorChild::Create(Transport* aTransport, ProcessId aOtherProcess)
{
// There's only one compositor per child process.
MOZ_ASSERT(!sCompositor);
nsRefPtr<CompositorChild> child(new CompositorChild(nullptr));
ProcessHandle handle;
if (!base::OpenProcessHandle(aOtherProcess, &handle)) {
// We can't go on without a compositor.
NS_RUNTIMEABORT("Couldn't OpenProcessHandle() to parent process.");
return nullptr;
}
if (!child->Open(aTransport, handle, XRE_GetIOMessageLoop(),
AsyncChannel::Child)) {
NS_RUNTIMEABORT("Couldn't Open() Compositor channel.");
return nullptr;
}
// We release this ref in ActorDestroy().
return sCompositor = child.forget().get();
}
/*static*/ PCompositorChild*
CompositorChild::Get()
{
// This is only expected to be used in child processes.
MOZ_ASSERT(XRE_GetProcessType() != GeckoProcessType_Default);
return sCompositor;
}
PLayersChild*
CompositorChild::AllocPLayers(const LayersBackend& aBackendHint,
const uint64_t& aId,
TextureFactoryIdentifier* aTextureFactoryIdentifier)
{
return new ShadowLayersChild();
}
bool
CompositorChild::DeallocPLayers(PLayersChild* actor)
{
delete actor;
return true;
}
void
CompositorChild::ActorDestroy(ActorDestroyReason aWhy)
{
MOZ_ASSERT(sCompositor == this);
if (aWhy == AbnormalShutdown) {
NS_RUNTIMEABORT("ActorDestroy by IPC channel failure at CompositorChild");
}
sCompositor = NULL;
// We don't want to release the ref to sCompositor here, during
// cleanup, because that will cause it to be deleted while it's
// still being used. So defer the deletion to after it's not in
// use.
MessageLoop::current()->PostTask(
FROM_HERE,
NewRunnableMethod(this, &CompositorChild::Release));
}
} // namespace layers
} // namespace mozilla