Copy the (early prototype of) remoting in Chrome into the public tree....

remoting/host/capturer_gdi.h

+// Copyright (c) 2010 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 REMOTING_HOST_CAPTURER_GDI_H_
+#define REMOTING_HOST_CAPTURER_GDI_H_
+
+#include <windows.h>
+typedef HBITMAP BitmapRef;
+#include "base/scoped_ptr.h"
+#include "remoting/host/capturer.h"
+
+namespace remoting {
+
+// CapturerGdi captures 24bit RGB using GDI.
+//
+// CapturerGdi is doubled buffered as required by Capturer. See
+// remoting/host/capturer.h.
+class CapturerGdi : public Capturer {
+ public:
+  CapturerGdi();
+  virtual ~CapturerGdi();
+
+  virtual void CaptureFullScreen(Task* done_task);
+  virtual void CaptureDirtyRects(Task* done_task);
+  virtual void CaptureRect(const gfx::Rect& rect, Task* done_task);
+  virtual void GetData(const uint8* planes[]) const;
+  virtual void GetDataStride(int strides[]) const;
+  virtual void GetWidth() const;
+  virtual void GetHeight() const;
+
+ private:
+  // Initialize GDI structures.
+  void InitializeBuffers();
+  // Generates an image in the current buffer.
+  void CaptureImage();
+
+  // Gdi specific information about screen.
+  HDC desktop_dc_;
+  HDC memory_dc_;
+  HBITMAP target_bitmap_[kNumBuffers];
+
+  // We have two buffers for the screen images as required by Capturer.
+  void* buffers_[kNumBuffers];
+  bool initialized_;  // Set to 'true' if buffers are initialized.
+
+  DISALLOW_COPY_AND_ASSIGN(CapturerGdi);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_CAPTURER_GDI_H_