Here is an extract from the README file: * Copyright (C) 1989-94 GROUPE BULL XPM Version 3 WHAT IS XPM? ============ XPM (X PixMap) is a format for storing/retrieving X pixmaps to/from files. Here is provided a library containing a set of four functions, similar to the X bitmap functions as defined in the Xlib: XpmCreatePixmapFromData, XpmCreateDataFromPixmap, XpmReadFileToPixmap and XpmWriteFileFromPixmap for respectively including, storing, reading and writing this format, plus four other: XpmCreateImageFromData, XpmCreateDataFromImage, XpmReadFileToImage and XpmWriteFileFromImage for working with images instead of pixmaps. WWW: http://www-sop.inria.fr/koala/lehors/xpm.html