xpmtoppm (1) - Linux Manuals

xpmtoppm: convert an X11 pixmap into a portable pixmap


xpmtoppm - convert an X11 pixmap into a portable pixmap


xpmtoppm [--alphaout={alpha-filename,-}] [-verbose] [xpmfile]


Reads an X11 pixmap (XPM version 1 or 3) as input. Produces a PPM file as output.


xpmtoppm creates a PBM file containing the transparency mask for the image. If the input image doesn't contain transparency information, the alpha-filename file contains all white (opaque) alpha values. If you don't specify --alphaout, xpmtoppm does not generate an alpha file, and if the input image has transparency information, xpmtoppm simply discards it.

If you specify - as the filename, xpmtoppm writes the alpha output to Standard Output and discards the image.

See pnmcomp(1) for one way to use the alpha output file.

xpmtoppm prints information about its processing on Standard Error.


The support to XPM version 3 is limited. Comments can only be single lines and there must be for every pixel a default colorname for a color type visual.


Copyright (C) 1991 by Jef Poskanzer.

Upgraded to support XPM version 3 by
    Arnaud Le Hors (lehors [at] mirsa.inria.fr)
    Tue Apr 9 1991


ppmtoxpm(1), pnmcomp(1), ppm(5)