This is the first time I come across a format called "xpm". Two things on it:
1 what is .xpm format?
X PixMap (XPM) is an image file format used by the X Window System, created in 1989 by Daniel Dardailler and Colas Nahaboo working at Bull Research Center at Sophia Antipolis, France, and later enhanced by Arnaud Le Hors. (from wiki)
2 how to convert general pictures to this format?
using xnconverter.
