Windows: Add off-screen rendering support (issue #518).

- Popup menus, drag&drop and GPU acceleration are not currently supported.
- Testing is enabled in cefclient by passing the "off-screen-rendering-enabled" command-line flag.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@919 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/cefclient/osrenderer.h

@@ -0,0 +1,58 @@
+// Copyright (c) 2012 The Chromium Embedded Framework 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 CEF_TESTS_CEFCLIENT_OSRENDERER_H_
+#define CEF_TESTS_CEFCLIENT_OSRENDERER_H_
+#pragma once
+
+#include "include/cef_browser.h"
+#include "include/cef_render_handler.h"
+
+class ClientOSRenderer {
+ public:
+  // The context must outlive this object.
+  explicit ClientOSRenderer(bool transparent);
+  virtual ~ClientOSRenderer();
+
+  // Initialize the OpenGL environment.
+  void Initialize();
+
+  // Clean up the OpenGL environment.
+  void Cleanup();
+
+  // Render to the screen.
+  void Render();
+
+  // Forwarded from CefRenderHandler callbacks.
+  void OnPopupShow(CefRefPtr<CefBrowser> browser,
+                   bool show);
+  void OnPopupSize(CefRefPtr<CefBrowser> browser,
+                   const CefRect& rect);
+  void OnPaint(CefRefPtr<CefBrowser> browser,
+               CefRenderHandler::PaintElementType type,
+               const CefRenderHandler::RectList& dirtyRects,
+               const void* buffer, int width, int height);
+
+  // Apply spin.
+  void SetSpin(float spinX, float spinY);
+  void IncrementSpin(float spinDX, float spinDY);
+
+  bool IsTransparent() { return transparent_; }
+
+  int GetViewWidth() { return view_width_; }
+  int GetViewHeight() { return view_height_; }
+
+ private:
+  bool transparent_;
+  bool initialized_;
+  unsigned int texture_id_;
+  int view_width_;
+  int view_height_;
+  CefRect popup_rect_;
+  float spin_x_;
+  float spin_y_;
+};
+
+#endif  // CEF_TESTS_CEFCLIENT_OSRENDERER_H_
+