This is an example that I've actually made a long time ago, but apparently it remains a common unresolved problem.
Above: in-game view. Below: taken screenshot of entire room
For multiple cases you may need to take a screenshot (or copy to surface) entire room, while only portion of it can be seen at once (window/screen size limitations).
A perfect work-around for this is to force screen drawing into a surface of chosen size, after adjusting view settings.