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.
In addition to the options common to all programs based on libnetpbm
(most notably -quiet, see
Common Options ), ximtoppm recognizes the following command line option:
You can abbreviate any option to its shortest unique prefix.
If you specify - as the filename, ximtoppm writes the transparency output to Standard Output and discards the image.
Actually, an Xim image can contain an arbitrary fourth channel -- it need not be a transparency channel. ximtoppm extracts any fourth channel it finds as described above; it doesn't matter if it is a transparency channel or not.
See pamcomp(1) for one way to use the transparency output file.