From Stephan Huber, "* osgGA: fixed a small bug regarding emulating mouse-events from touch-events

* resthttp/osc: encapsulate RequestHandler-classes in their own namespaces to prevent class-name-lookup-errors in the debugger/code (had some weird crashes)
* QTKit: fixed a compile-bug for gcc and blocks
* osgPresentation: click_to_* will fire on RELEASE, only if the drawable received a PUSH beforehand
* p3d/osgPresentation: implemented "forward_mouse_event_to_device"-tag, which will forward mouse-events to all registered devices of a viewer, if an intersection occurs. The mouse-coordinates get reprojected
* present3d: all devices get registered with the viewer
* osgViewer: only devices which are capable of receiving events are queried for new events.
* GraphicWindowIOS: added a flag to GraphicWindowIOS::WindowData to set up a retained backing buffer (defaults to false) This will enable read-back of the render-buffer with glReadPixels even after the renderbuffer got presented
* curl: added an optimized check for file-existance, now only the headers are requested and checked, instead of reading the whole file and handle it with a ReaderWriter
* p3d: fixed a bug, where the existence of a local file may prevent the remote loading of a file with the same name.

"

include/osgViewer/api/IOS/GraphicsWindowIOS

@@ -149,7 +149,8 @@ class GraphicsWindowIOS : public osgViewer::GraphicsWindow
                 :   _windowOrView(window_or_view),
                     _deviceOrientationFlags(orientationFlags),
                     _viewContentScaleFactor(scaleFactor),
-                    _createTransparentView(false)
+                    _createTransparentView(false),
+                    _useRetainedBacking(false)
                 {
                 }
                 
@@ -161,12 +162,17 @@ class GraphicsWindowIOS : public osgViewer::GraphicsWindow
                 
                 bool getCreateTransparentView() { return _createTransparentView; }
                 void setCreateTransparentView(bool b) { _createTransparentView = b; }
+
+                bool getUseRetainedBacking() { return _useRetainedBacking; }
+                void setUseRetainedBacking(bool b) { _useRetainedBacking = b; }
+
             private:
 
                 UIView*                _windowOrView;
                 DeviceOrientationFlags _deviceOrientationFlags;
                 float                  _viewContentScaleFactor; 
                 bool                   _createTransparentView;
+                bool                   _useRetainedBacking; 
         
             friend class GraphicsWindowIOS;