XPM (which stands for X Window System PixMaps) is a derivation of the XBM format designed to represent color images in a simple to process format. See http://koala.ilog.fr/lehors/xpm.html for information on the format.
See Img for a Tk extension which can assist in displaying images in xpm format, or XPM to photo image or Tk_Xpm for specialized extensions/procs to handle XPMs.
category acronym | category graphics | category image processing