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<H1>xpmtoppm</H1>
Updated: 31 December 2011
<BR>
<A HREF="#index">Table Of Contents</A>
<H2>NAME</H2>
xpmtoppm - convert an X11 pixmap to a PPM image
<H2 id="synopsis">SYNOPSIS</H2>
<B>xpmtoppm</B>
[<B>--alphaout=</B>{<I>alpha-filename</I>,<B>-</B>}]
[<B>-verbose</B>]
[<I>xpmfile</I>]
<H2 id="description">DESCRIPTION</H2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>xpbtoppm</b> reads an X11 pixmap (XPM version 1 or 3) as input
and produces a PPM image as output.
<H2 id="options">OPTIONS</H2>
<DL COMPACT>
<DT><B>--alphaout=</B><I>alpha-filename</I>
<DD><B>xpmtoppm</B> creates a PBM file containing the transparency
mask for the image. If the input image doesn't contain transparency
information, the <I>alpha-filename</I> file contains all white
(opaque) transparency values. If you don't specify <B>--alphaout</B>,
<B>xpmtoppm</B> does not generate a transparency file, and if the input
image has transparency information, <B>xpmtoppm</B> simply discards
it.
<P>If you specify <B>-</B> as the filename, <B>xpmtoppm</B> writes the
transparency output to Standard Output and discards the image.
<P>See <B><A HREF="pamcomp.html">pamcomp</A></B> for one way to use
the transparency output file.
<p><b>xpmtoppm</b> can't handle a line longer than 8K characters in
the XPM input. If an input line exceeds this limit,
<b>xpmtoppm</b> quits with an error message to that effect. Before
Netpbm 10.30 (October 2005), the limit was 2K.
<DT><B>--verbose</B>
<DD>
<B>xpmtoppm</B> prints information about its processing on Standard Error.
</DL>
<H2 id="limitations">LIMITATIONS</H2>
<p><b>xpmtoppm</b> recognizes only a limited set of the features of XPM
Version 3; i.e. it rejects as invalid many valid XPM images.
<p>The only place a comment block is valid is starting in Column 1 of the
line immediately after "static char ...".
<p>In addition, <b>ppmtoxpm</b> properly recognizes any single-line
comment that begins in Column 1 in the color table part of the file.
<p>There must be for every pixel a default colorname for a color type visual.
<p>Before Netpbm 10.58 (March 2012), zero bytes per pixel causes the program
to fail with a message about premature EOF on input.
<H2 id="seealso">SEE ALSO</H2>
<B><A HREF="ppmtoxpm.html">ppmtoxpm</A></B>,
<B><A HREF="pamcomp.html">pamcomp</A></B>,
<B><A HREF="ppm.html">ppm</A></B>
<H2 id="author">AUTHOR</H2>
<P>Copyright (C) 1991 by Jef Poskanzer.
<P>Upgraded to work with XPM version 3 by Arnaud Le
Hors<<A HREF="mailto:lehors@mirsa.inria.fr">lehors@mirsa.inria.fr</A>>,
Tue Apr 9 1991.
<HR>
<H2 id="index">Table Of Contents</H2>
<UL>
<LI><A HREF="#synopsis">SYNOPSIS</A>
<LI><A HREF="#description">DESCRIPTION</A>
<LI><A HREF="#options">OPTIONS</A>
<LI><A HREF="#limitations">LIMITATIONS</A>
<LI><A HREF="#seealso">SEE ALSO</A>
<LI><A HREF="#author">AUTHOR</A>
</UL>
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