This program is part of Netpbm.
ppmtopuzz reads a PPM image as input and 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 option lets you specify an image file.
There are no command line options defined specifically for ppmtopuzz, but it recognizes the options common to all programs based on libnetpbm (See Common Options.)