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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.3//EN">
<html><head><title>Psidtopgm User Manual</title></head>
<body>
<h1>psidtopgm</h1>
Updated: 02 August 89
<br>
<a href="#index">Table Of Contents</a>
<h2>NAME</h2>
psidtopgm - convert PostScript "image" data to a PGM image
<h2 id="synopsis">SYNOPSIS</h2>
<b>psidtopgm</b> <i>width</i> <i>height</i> <i>bits/sample</i> [<i>imagedata</i>]
<h2 id="description">DESCRIPTION</h2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>psidtopgm</b> reads the "image" data from a PostScript
file as input and produces a PGM image as output.
<p>This program is obsoleted by <b>pstopnm</b>.
What follows was written before <b>pstopnm </b> existed.
<p>This is a very simple and limited program, and is here only because
so many people have asked for it. To use it you have to
<em>manually</em> extract the readhexstring data portion from your
PostScript file, and then give the width, height, and bits/sample on
the command line. Before you attempt this, you should <em>at
least</em> read the description of the "image" operator in
the PostScript Language Reference Manual.
<p>It would probably not be too hard to write a script that uses this
filter to read a specific variety of PostScript image, but the
variation is too great to make a general-purpose reader. Unless, of
course, you want to write a full-fledged PostScript interpreter...
<h2 id="options">OPTIONS</h2>
<p>There are no command line options defined specifically
for <b>psidtopgm</b>, but it recognizes the options common to all
programs based on libnetpbm (See <a href="index.html#commonoptions">
Common Options</a>.)
<h2 id="seealso">SEE ALSO</h2>
<a href="pnmtops.html">pnmtops</a>,
<a href="pgm.html">pgm</a>
<h2 id="author">AUTHOR</h2>
Copyright (C) 1989 by Jef Poskanzer.
<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="#seealso">SEE ALSO</a>
<li><a href="#author">AUTHOR</a>
</ul>
</body>
</html>
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