+ /* XXX This results in different widths/heights than if AllowNegativeWindowPosition
+ * XXX was false. The "freeglut" community defined this logic.
+ * XXX (freeglut-developer e-mail from Diederick C. Niehorster, 11/15/2015, 4:06 PM EST.
+ * XXX "Re: [Freeglut-developer] glutInitWindowPosition with negative coordinate(s)")
+ */