content/browser/compositor/browser_compositor_output_surface_proxy.h

// 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_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_OUTPUT_SURFACE_PROXY_H_
#define CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_OUTPUT_SURFACE_PROXY_H_

#include "base/id_map.h"
#include "base/memory/ref_counted.h"
#include "base/time/time.h"
#include "content/common/content_export.h"

namespace base { class SingleThreadTaskRunner; }

namespace IPC { class Message; }

namespace content {
class BrowserCompositorOutputSurface;

// Directs vsync updates to the appropriate BrowserCompositorOutputSurface.
class CONTENT_EXPORT BrowserCompositorOutputSurfaceProxy
    : public base::RefCountedThreadSafe<BrowserCompositorOutputSurfaceProxy> {
 public:
  BrowserCompositorOutputSurfaceProxy(
      IDMap<BrowserCompositorOutputSurface>* surface_map);

  // Call this before each OutputSurface is created to ensure that the
  // proxy is connected to the current host.
  void ConnectToGpuProcessHost(
      base::SingleThreadTaskRunner* compositor_thread_task_runner);

 private:
  friend class base::RefCountedThreadSafe<BrowserCompositorOutputSurfaceProxy>;
  friend class SoftwareBrowserCompositorOutputSurface;
  ~BrowserCompositorOutputSurfaceProxy();

  void OnMessageReceivedOnCompositorThread(const IPC::Message& message);

  void OnUpdateVSyncParametersOnCompositorThread(int surface_id,
                                                 base::TimeTicks timebase,
                                                 base::TimeDelta interval);

  IDMap<BrowserCompositorOutputSurface>* surface_map_;
  int connected_to_gpu_process_host_id_;

  DISALLOW_COPY_AND_ASSIGN(BrowserCompositorOutputSurfaceProxy);
};

}  // namespace content

#endif  // CONTENT_BROWSER_COMPOSITOR_BROWSER_COMPOSITOR_OUTPUT_SURFACE_PROXY_H_