CentOS 7.0 - man page for ximtoppm (centos section 0)
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Ximtoppm User Manual(0) Ximtoppm User Manual(0)
ximtoppm - convert an Xim file to a PPM image
This program is part of Netpbm(1)
ximptoppm reads an Xim file as input and produces a PPM image as output. The Xim toolkit
is included in the contrib tree of the X.V11R4 release.
You can abbreviate any option to its shortest unique prefix.
ximtoppm creates a PGM file containing the alpha channel values in the input image.
If the input image doesn't contain an alpha channel, the alpha-filename file con-
tains all zero (transparent) alpha values. If you don't specify --alphaout, xim-
toppm does not generate an alpha file, and if the input image has an alpha channel,
ximtoppm simply discards it.
If you specify - as the filename, ximtoppm writes the alpha output to Standard Out-
put and discards the image.
Actually, an Xim image can contain an arbitrary fourth channel -- it need not be an
Alpha channel. ximtoppm extracts any fourth channel it finds as described above;
it doesn't matter if it is an alpha channel or not.
for one way to use the alpha output file.
pamcomp(1) , ppm(1)
Copyright (C) 1991 by Jef Poskanzer.
netpbm documentation April 2, 2000 Ximtoppm User Manual(0)
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