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RedHat 9 (Linux i386) - man page for xpmtoppm (redhat section 1)

xpmtoppm(1)						      General Commands Manual						       xpmtoppm(1)

xpmtoppm - convert an X11 pixmap into a PPM image
xpmtoppm [--alphaout={alpha-filename,-}] [-verbose] [xpmfile]
Reads an X11 pixmap (XPM version 1 or 3) as input. Produces a PPM file as output.
--alphaout=alpha-filename xpmtoppm creates a PBM file containing the transparency mask for the image. If the input image doesn't contain transparency infor- mation, the alpha-filename file contains all white (opaque) alpha values. If you don't specify --alphaout, xpmtoppm does not gener- ate 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. --verbose 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.
ppmtoxpm(1), pnmcomp(1), ppm(5)
Copyright (C) 1991 by Jef Poskanzer. Upgraded to support XPM version 3 by Arnaud Le Hors ( Tue Apr 9 1991 06 May 2001 xpmtoppm(1)