Implemented browser side software compositing.

content/browser/renderer_host/software_output_device_linux.h

+// Copyright (c) 2013 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_RENDERER_HOST_SOFTWARE_OUTPUT_DEVICE_LINUX_H_
+#define CONTENT_BROWSER_RENDERER_HOST_SOFTWARE_OUTPUT_DEVICE_LINUX_H_
+
+#include "cc/software_output_device.h"
+#include "ui/base/x/x11_util.h"
+
+namespace ui {
+class Compositor;
+}
+
+namespace content {
+
+class SoftwareOutputDeviceLinux : public cc::SoftwareOutputDevice {
+ public:
+  explicit SoftwareOutputDeviceLinux(ui::Compositor* compositor);
+
+  virtual ~SoftwareOutputDeviceLinux();
+
+  virtual void Resize(const gfx::Size& viewport_size) OVERRIDE;
+
+  virtual void EndPaint(cc::SoftwareFrameData* frame_data) OVERRIDE;
+
+ private:
+  void ClearImage();
+
+  ui::Compositor* compositor_;
+  Display* display_;
+  GC gc_;
+  XImage* image_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_SOFTWARE_OUTPUT_DEVICE_LINUX_H_