1 files changed, 74 insertions, 0 deletions
diff --git a/chrome/gpu/gpu_backing_store.h b/chrome/gpu/gpu_backing_store.h
new file mode 100644
index 0000000..bfe9941
--- /dev/null
+++ b/chrome/gpu/gpu_backing_store.h
@@ -0,0 +1,74 @@
+// 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 CHROME_GPU_GPU_BACKING_STORE_H_
+#define CHROME_GPU_GPU_BACKING_STORE_H_
+
+#include <windows.h>
+
+#include <vector>
+
+#include "app/gfx/native_widget_types.h"
+#include "base/basictypes.h"
+#include "base/gfx/size.h"
+#include "chrome/common/transport_dib.h"
+#include "ipc/ipc_channel.h"
+
+class GpuThread;
+class GpuViewWin;
+
+namespace gfx {
+class Rect;
+class Size;
+}
+
+class GpuBackingStore : public IPC::Channel::Listener {
+ public:
+  GpuBackingStore(GpuViewWin* view,
+                  GpuThread* gpu_thread,
+                  int32 routing_id,
+                  const gfx::Size& size);
+  ~GpuBackingStore();
+
+  gfx::Size size() const { return size_; }
+  HDC hdc() const { return hdc_; }
+
+  // IPC::Channel::Listener implementation.
+  virtual void OnMessageReceived(const IPC::Message& message);
+  virtual void OnChannelConnected(int32 peer_pid);
+  virtual void OnChannelError();
+
+ private:
+  // Message handlers.
+  void OnPaintToBackingStore(base::ProcessId source_process_id,
+                             TransportDIB::Id id,
+                             const gfx::Rect& bitmap_rect,
+                             const std::vector<gfx::Rect>& copy_rects);
+  void OnScrollBackingStore(int dx, int dy,
+                            const gfx::Rect& clip_rect,
+                            const gfx::Size& view_size);
+
+  GpuViewWin* view_;
+
+  GpuThread* gpu_thread_;
+  int32 routing_id_;
+
+  gfx::Size size_;
+
+  // The backing store dc.
+  HDC hdc_;
+
+  // Handle to the backing store dib.
+  HANDLE backing_store_dib_;
+
+  // Handle to the original bitmap in the dc.
+  HANDLE original_bitmap_;
+
+  // Number of bits per pixel of the screen.
+  int color_depth_;
+
+  DISALLOW_COPY_AND_ASSIGN(GpuBackingStore);
+};
+
+#endif  // CHROME_GPU_GPU_BACKING_STORE_H_