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// Copyright 2014 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.
#ifndef CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
#define CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "cc/scheduler/begin_frame_source.h"
#include "content/renderer/gpu/compositor_forwarding_message_filter.h"
namespace IPC {
class Message;
class SyncMessageFilter;
}
namespace content {
// This class can be created only on the main thread, but then becomes pinned
// to a fixed thread where cc::Scheduler is running.
class CompositorExternalBeginFrameSource
: public cc::BeginFrameSourceBase,
public NON_EXPORTED_BASE(base::NonThreadSafe) {
public:
explicit CompositorExternalBeginFrameSource(
CompositorForwardingMessageFilter* filter,
IPC::SyncMessageFilter* sync_message_filter,
int routing_id);
~CompositorExternalBeginFrameSource() override;
// cc::BeginFrameSourceBase implementation.
void AddObserver(cc::BeginFrameObserver* obs) override;
void OnNeedsBeginFramesChanged(bool needs_begin_frames) override;
void SetClientReady() override;
private:
class CompositorExternalBeginFrameSourceProxy
: public base::RefCountedThreadSafe<
CompositorExternalBeginFrameSourceProxy> {
public:
explicit CompositorExternalBeginFrameSourceProxy(
CompositorExternalBeginFrameSource* begin_frame_source)
: begin_frame_source_(begin_frame_source) {}
void ClearBeginFrameSource() { begin_frame_source_ = NULL; }
void OnMessageReceived(const IPC::Message& message) {
if (begin_frame_source_)
begin_frame_source_->OnMessageReceived(message);
}
private:
friend class base::RefCountedThreadSafe<
CompositorExternalBeginFrameSourceProxy>;
virtual ~CompositorExternalBeginFrameSourceProxy() {}
CompositorExternalBeginFrameSource* begin_frame_source_;
DISALLOW_COPY_AND_ASSIGN(CompositorExternalBeginFrameSourceProxy);
};
void OnMessageReceived(const IPC::Message& message);
void OnBeginFrame(const cc::BeginFrameArgs& args);
bool Send(IPC::Message* message);
scoped_refptr<CompositorForwardingMessageFilter> begin_frame_source_filter_;
scoped_refptr<CompositorExternalBeginFrameSourceProxy>
begin_frame_source_proxy_;
scoped_refptr<IPC::SyncMessageFilter> message_sender_;
int routing_id_;
CompositorForwardingMessageFilter::Handler begin_frame_source_filter_handler_;
cc::BeginFrameArgs missed_begin_frame_args_;
DISALLOW_COPY_AND_ASSIGN(CompositorExternalBeginFrameSource);
};
} // namespace content
#endif // CONTENT_RENDERER_GPU_COMPOSITOR_EXTERNAL_BEGIN_FRAME_SOURCE_H_
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