Added option for controlling whether the front buffer is read at the start of the frame or the back buffer at the end of the frame.
Added option for controlling whether the front buffer is read at the start of the
frame or the back buffer at the end of the frame.



git-svn-id: 23b6355f2bb369032457de4eb5f713ee134f73a8@8338 16af8721-9629-0410-8352-f15c8da7e697

joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg,joevandyk/osg