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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2012-11-24 21:14:10 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2012-11-24 21:14:10 +0000 |
| commit | bd09013efdd759e78f1c65ac6658cc2d76c2793b (patch) | |
| tree | 0d171d04943f962427dbe3dd41b030b6375edfda /ppmtospu.html | |
| parent | 5dedc824a9cd3d3e152fc33752c1e65f24d21ab6 (diff) | |
| download | netpbm-mirror-bd09013efdd759e78f1c65ac6658cc2d76c2793b.tar.gz netpbm-mirror-bd09013efdd759e78f1c65ac6658cc2d76c2793b.tar.xz netpbm-mirror-bd09013efdd759e78f1c65ac6658cc2d76c2793b.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@1785 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'ppmtospu.html')
| -rw-r--r-- | ppmtospu.html | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/ppmtospu.html b/ppmtospu.html new file mode 100644 index 00000000..dae8001e --- /dev/null +++ b/ppmtospu.html @@ -0,0 +1,102 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML><HEAD><TITLE>Ppmtospu User Manual</TITLE></HEAD> +<BODY> +<H1>ppmtospu</H1> +Updated: 08 March 2012 +<BR> +<A HREF="#index">Table Of Contents</A> + +<H2>NAME</H2> + +ppmtospu - convert a PPM image to an Atari Spectrum 512 image + +<H2 id="synopsis">SYNOPSIS</H2> + +<B>ppmtospu</B> + +[<b>-d0</b>|<b>-d2</b>|<b>-d4</b>] +[<I>ppmfile</I>] + +<P>All options can be abbreviated to their shortest unique prefix. +You may use two hyphens instead of one. You may separate an option +name and its value with white space instead of an equals sign. + +<H2 id="description">DESCRIPTION</H2> + +<p>This program is part of <a href="index.html">Netpbm</a>. + +<p>This program converts from the PPM format to the uncompressed Spectrum 512 +image format used on Atari ST computers. + +<p>Input comes from the file you name with the <i>ppmfile</i> argument, or +Standard Input by default. Output goes to Standard Output. + +<p>The input must be 320 pixels wide by 200 pixels high. If you have an +image of a different size, you can use <b>pamcut</b> or <b>pamscale</b> +to force it to these dimensions. + + +<H2 id="options">OPTIONS</H2> + +<dl> +<dt><b>-d0</b> +<dd>The program does no dithering. + +<dt><b>-d2</b> +<dd>The program uses a 2x2 ordered dither. +<p>This is the default. + +<dt><b>-d4</b> +<dd>The program uses a 4x4 ordered dither. + +</dl> + + +<H2 id="seealso">SEE ALSO</H2> + + +<B><A HREF="sputoppm.html">sputoppm</A></B>, +<B><A HREF="spctoppm.html">sputoppm</A></B>, +<B><A HREF="pamscale.html">pamscale</A></B>, +<B><A HREF="pamcut.html">pamcut</a></b>, +<B><A HREF="ppm.html">ppm</A></B> + + +<H2 id="author">AUTHOR</H2> + +Copyright (C) 1990 by Steve Belczyk + + +<h2 id="history">HISTORY</H2> + +<P>This program was new in Netpbm 10.58 (March 2012). + +<p>But it was written in 1990. Steve Belczyk posted it along +with <b>sputoppm</b>, <b>spctoppm</b>, <b>pi1toppm</b>, and +<b>pi1toppm</b> - all programs for dealing with Atari image formats - +to comp.sources.misc on July 15, 1990. For reasons that have been lost +to history, all of these entered the Netpbm (then Pbmplus) distribution +<em>except</em> <b>ppmtospu</b>. + +<P>Georges Kesseler wondered In March 2012 why there was no counterpart to +<b>sputoppm</b> in Netpbm and searched the web, finding only one reference +to <b>ppmtopsu</b>: the 1990 comp.sources.misc posting, including the source +code. He emailed the Netpbm maintainer suggesting it be added. + +<p>Bryan Henderson found the source code to be extremely primitive, not even +using common library code. So Bryan completely recoded it, but retained +nearly all of the original logic. + + +<HR> +<H2 id="contents">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> + |