ppmtopuzz - convert a portable pixmap into an X11 "puzzle" file
Reads a portable pixmap as input. Produces an X11 "puzzle" file as output. A "puzzle" file is for use with the puzzle program included with the X11 distribution - puzzle’s -picture flag lets you specify an image file.
Copyright (C) 1991 by Jef Poskanzer. 22 August 1990 ppmtopuzz(1)