Ximtoppm User Manual(0) | Ximtoppm User Manual(0) |
NAME
ximtoppm - convert an Xim file to a PPM image
SYNOPSIS
ximtoppm
[--alphaout={alpha-filename,-}] [ximfile]
DESCRIPTION
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.
OPTIONS
You can abbreviate any option to its shortest unique prefix.
- --alphaout=alpha-filename
- 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 contains all zero (transparent) alpha values.
If you don't specify --alphaout, ximtoppm 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 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(1)
for one way to use the alpha output file.
SEE ALSO
AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
April 2, 2000 | netpbm documentation |