ximtoppm man page

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 transparency channel values in the input image.  If the input image doesn't contain a transparency channel, the alpha-filename file contains all zero (transparent) transparency values.  If you don't specify --alphaout, ximtoppm does not generate a transparency file, and if the input image has a transparency channel, ximtoppm simply discards it.

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.

See Also

pamcomp(1), ppm(1)

Author

Copyright (C) 1991 by Jef Poskanzer.

Document Source

This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

http://netpbm.sourceforge.net/doc/ximtoppm.html

Info

April 2, 2000 netpbm documentation