ximtoppm
Updated: April 2, 2000
Table Of Contents
NAME
ximtoppm - convert an Xim file to a PPM image
SYNOPSIS
ximtoppm [--alphaout={alpha-filename,-}] [ximfile]
You can abbreviate any option to its shortest unique prefix.
DESCRIPTION
This program is part of Netpbm.
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 re-
lease.
OPTIONS
--alphaout=alpha-filename
ximtoppm creates a PGM file containing the alpha chan-
nel values in
the input image. If the input image doesn't contain an
alpha channel,
the alpha-filename file contains all zero (transparent)
alpha values.
If you don't specify --alphaout, ximtoppm does not gen-
erate an alpha
file, and if the input image has an alpha channel, xim-
toppm simply
discards it.
If you specify - as the filename, ximtoppm writes the
alpha output to
Standard Output 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.
See pamcomp for one way to use the alpha output file.
SEE ALSO
pamcomp, ppm
AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
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Table Of Contents
* NAME
* SYNOPSIS
* DESCRIPTION
* OPTIONS
* SEE ALSO
* AUTHOR
UNIX/Linux commands referenced on this page:
- convert
- file
- as
- pamcomp