xpr takes as input a window dump file produced by xwd and formats it for output on PostScript printers, the Digital LN03 or LA100, the IBM PP3812 page printer, the HP LaserJet (or other PCL printers), or the HP PaintJet.
xdpr uses the commands xwd, xpr, and lpr or lp to dump an X window, process it for a particular printer type, and print it out on the printer of your choice.
