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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/renderer/gpu/compositor_output_surface.h"
#include "base/command_line.h"
#include "base/message_loop_proxy.h"
#include "cc/output/compositor_frame.h"
#include "cc/output/compositor_frame_ack.h"
#include "cc/output/output_surface_client.h"
#include "content/common/gpu/client/command_buffer_proxy_impl.h"
#include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
#include "content/common/view_messages.h"
#include "content/public/common/content_switches.h"
#include "content/renderer/render_thread_impl.h"
#include "ipc/ipc_forwarding_message_filter.h"
#include "ipc/ipc_sync_channel.h"
#include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
using WebKit::WebGraphicsContext3D;
namespace {
// There are several compositor surfaces in a process, but they share the same
// compositor thread, so we use a simple int here to track prefer-smoothness.
int g_prefer_smoothness_count = 0;
} // namespace
namespace content {
//------------------------------------------------------------------------------
// static
IPC::ForwardingMessageFilter* CompositorOutputSurface::CreateFilter(
base::TaskRunner* target_task_runner)
{
uint32 messages_to_filter[] = {
ViewMsg_UpdateVSyncParameters::ID,
ViewMsg_SwapCompositorFrameAck::ID,
#if defined(OS_ANDROID)
ViewMsg_BeginFrame::ID
#endif
};
return new IPC::ForwardingMessageFilter(
messages_to_filter, arraysize(messages_to_filter),
target_task_runner);
}
CompositorOutputSurface::CompositorOutputSurface(
int32 routing_id,
WebGraphicsContext3DCommandBufferImpl* context3D,
cc::SoftwareOutputDevice* software_device)
: OutputSurface(scoped_ptr<WebKit::WebGraphicsContext3D>(context3D),
make_scoped_ptr(software_device)),
output_surface_filter_(
RenderThreadImpl::current()->compositor_output_surface_filter()),
routing_id_(routing_id),
prefers_smoothness_(false),
main_thread_handle_(base::PlatformThread::CurrentHandle()) {
DCHECK(output_surface_filter_.get());
CommandLine* command_line = CommandLine::ForCurrentProcess();
capabilities_.has_parent_compositor = command_line->HasSwitch(
switches::kEnableDelegatedRenderer);
DetachFromThread();
message_sender_ = RenderThreadImpl::current()->sync_message_filter();
DCHECK(message_sender_.get());
}
CompositorOutputSurface::~CompositorOutputSurface() {
DCHECK(CalledOnValidThread());
if (!client_)
return;
UpdateSmoothnessTakesPriority(false);
if (output_surface_proxy_.get())
output_surface_proxy_->ClearOutputSurface();
output_surface_filter_->RemoveRoute(routing_id_);
}
bool CompositorOutputSurface::BindToClient(
cc::OutputSurfaceClient* client) {
DCHECK(CalledOnValidThread());
if (!cc::OutputSurface::BindToClient(client))
return false;
output_surface_proxy_ = new CompositorOutputSurfaceProxy(this);
output_surface_filter_->AddRoute(
routing_id_,
base::Bind(&CompositorOutputSurfaceProxy::OnMessageReceived,
output_surface_proxy_));
return true;
}
void CompositorOutputSurface::SendFrameToParentCompositor(
cc::CompositorFrame* frame) {
DCHECK(CalledOnValidThread());
Send(new ViewHostMsg_SwapCompositorFrame(routing_id_, *frame));
}
void CompositorOutputSurface::SwapBuffers(
const ui::LatencyInfo& latency_info) {
WebGraphicsContext3DCommandBufferImpl* command_buffer =
static_cast<WebGraphicsContext3DCommandBufferImpl*>(context3d());
CommandBufferProxyImpl* command_buffer_proxy =
command_buffer->GetCommandBufferProxy();
DCHECK(command_buffer_proxy);
context3d()->shallowFlushCHROMIUM();
command_buffer_proxy->SetLatencyInfo(latency_info);
OutputSurface::SwapBuffers(latency_info);
}
void CompositorOutputSurface::PostSubBuffer(
gfx::Rect rect, const ui::LatencyInfo& latency_info) {
WebGraphicsContext3DCommandBufferImpl* command_buffer =
static_cast<WebGraphicsContext3DCommandBufferImpl*>(context3d());
CommandBufferProxyImpl* command_buffer_proxy =
command_buffer->GetCommandBufferProxy();
DCHECK(command_buffer_proxy);
context3d()->shallowFlushCHROMIUM();
command_buffer_proxy->SetLatencyInfo(latency_info);
OutputSurface::PostSubBuffer(rect, latency_info);
}
void CompositorOutputSurface::OnMessageReceived(const IPC::Message& message) {
DCHECK(CalledOnValidThread());
if (!client_)
return;
IPC_BEGIN_MESSAGE_MAP(CompositorOutputSurface, message)
IPC_MESSAGE_HANDLER(ViewMsg_UpdateVSyncParameters, OnUpdateVSyncParameters);
IPC_MESSAGE_HANDLER(ViewMsg_SwapCompositorFrameAck, OnSwapAck);
#if defined(OS_ANDROID)
IPC_MESSAGE_HANDLER(ViewMsg_BeginFrame, OnBeginFrame);
#endif
IPC_END_MESSAGE_MAP()
}
void CompositorOutputSurface::OnUpdateVSyncParameters(
base::TimeTicks timebase, base::TimeDelta interval) {
DCHECK(CalledOnValidThread());
client_->OnVSyncParametersChanged(timebase, interval);
}
#if defined(OS_ANDROID)
void CompositorOutputSurface::SetNeedsBeginFrame(bool enable) {
DCHECK(CalledOnValidThread());
Send(new ViewHostMsg_SetNeedsBeginFrame(routing_id_, enable));
}
void CompositorOutputSurface::OnBeginFrame(base::TimeTicks frame_time) {
DCHECK(CalledOnValidThread());
client_->BeginFrame(frame_time);
}
#endif // defined(OS_ANDROID)
void CompositorOutputSurface::OnSwapAck(const cc::CompositorFrameAck& ack) {
client_->OnSendFrameToParentCompositorAck(ack);
}
bool CompositorOutputSurface::Send(IPC::Message* message) {
return message_sender_->Send(message);
}
namespace {
#if defined(OS_ANDROID)
void SetThreadPriorityToIdle(base::PlatformThreadHandle handle) {
base::PlatformThread::SetThreadPriority(
handle, base::kThreadPriority_Background);
}
void SetThreadPriorityToDefault(base::PlatformThreadHandle handle) {
base::PlatformThread::SetThreadPriority(
handle, base::kThreadPriority_Normal);
}
#else
void SetThreadPriorityToIdle(base::PlatformThreadHandle handle) {}
void SetThreadPriorityToDefault(base::PlatformThreadHandle handle) {}
#endif
}
void CompositorOutputSurface::UpdateSmoothnessTakesPriority(
bool prefers_smoothness) {
#ifndef NDEBUG
// If we use different compositor threads, we need to
// use an atomic int to track prefer smoothness count.
base::PlatformThreadId g_last_thread = base::PlatformThread::CurrentId();
DCHECK_EQ(g_last_thread, base::PlatformThread::CurrentId());
#endif
if (prefers_smoothness_ == prefers_smoothness)
return;
// If this is the first surface to start preferring smoothness,
// Throttle the main thread's priority.
if (prefers_smoothness_ == false &&
++g_prefer_smoothness_count == 1) {
SetThreadPriorityToIdle(main_thread_handle_);
}
// If this is the last surface to stop preferring smoothness,
// Reset the main thread's priority to the default.
if (prefers_smoothness_ == true &&
--g_prefer_smoothness_count == 0) {
SetThreadPriorityToDefault(main_thread_handle_);
}
prefers_smoothness_ = prefers_smoothness;
}
} // namespace content
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