chocolate-doom/chocolate-doom — pull request #447 by chungy (2014-10-19 07:41:04+00:00)
Title: allow -geometry to specify fullscreen or windowed modes, like PrBoom

This allows strings like "640x480w" to cause the engine to run in a
window, while strings like "1280x800f" cause the engine to run in
fullscreen mode. This is inspired by the behavior of the PrBoom
-geometry parameter.