scummvm/scummvm — pull request #364 by lordhoto (2013-08-02 16:48:50+00:00)
Title: GRAPHICS: Allow to query a Surface describing a subarea in Surface.

This can be for example used for https://github.com/rundfunk47/scummvm/commit/b5dcd450942df0d8181724388ab05cf2079aca7e or any other application area where you want to have a Surface describe a sub-area of another Surface.