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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">
<HTML><HEAD><TITLE>Ilbmtoppm User Manual</TITLE></HEAD>
<BODY>
<H1>ilbmtoppm</H1>
Updated: 04 October 1993
<BR>
<A HREF="#index">Table Of Contents</A>
<A NAME="lbAB"> </A>
<H2>NAME</H2>
ilbmtoppm - convert an ILBM file into a PPM image
<A NAME="lbAC"> </A>
<H2>SYNOPSIS</H2>
<B>ilbmtoppm</B>
[<B>-verbose</B>]
[<B>-ignore</B><chunkID><B>]</B>
[<B>-isham</B>|<B>-isehb</B>]
[<B>-adjustcolors</B>]
[<I>ILBMfile</I>]
<A NAME="lbAD"> </A>
<H2>DESCRIPTION</H2>
<p>This program is part of <a href="index.html">Netpbm</a>.
<p><b>ilbmtoppm</b> reads an IFF ILBM file as input and produces a PPM
image as output. <b>ilbmtoppm</b> can handle the following ILBM types:
<UL>
<LI>Normal ILBMs with 1-16 planes.
<LI>Amiga Extra_Halfbrite (EHB)
<LI>Amiga HAM with 3-16 planes.
<LI>24 bit.
<LI>Multiplatte (normal or HAM) pictures.
<LI>Color map (BMHD + CMAP chunk only, nPlanes = 0).
<LI>Unofficial direct color.
1-16 planes for each color component.
</UL>
<P><B>ilbmtoppm</b> uses these ILBM chunks: BMHD, CMAP, CAMG (only HAM
& EHB flags used), PCHG, BODY unofficial DCOL chunk to identify
direct color ILBM. It ignores these chunks: GRAB, DEST, SPRT, CRNG,
CCRT, CLUT, DPPV, DRNG, EPSF. It ignores, but displays in verbose
mode, these: NAME, AUTH, (c), ANNO, DPI. It skips chunks whose type
it doesn't recognize.
<A NAME="lbAE"> </A>
<H2>OPTIONS</H2>
<DL COMPACT>
<DT><B>-verbose</B>
<DD>Give some information about the ILBM file.
<DT><B>-ignore</b> <i>chunkID</i>
<DD>Skip a chunk. <i>chunkID</i> is the 4-letter IFF chunk identifier
of the chunk to be skipped.
<DT><B>-isham</b> | <b>-isehb</B>
<DD>Treat the input file as a HAM or Extra_Halfbrite picture, even if
these flags are not set in the CAMG chunk (or if there is no CAMG
chunk).
<DT><B>-adjustcolors</B>
<DD>If all colors in the CMAP have a value of less then 16, ilbmtoppm
assumes a 4-bit colormap and gives a warning. With this option the
colormap is scaled to 8 bits.
</DL>
<A NAME="lbAF"> </A>
<H2>LIMITATIONS</H2>
<p>The multipalette PCHG BigLineChanges and Huffman decompression code
is untested.
<A NAME="lbAG"> </A>
<H2>REFERENCES</H2>
Amiga ROM Kernel Reference Manual - Devices (3rd Ed.)
Addison Wesley, ISBN 0-201-56775-X
<A NAME="lbAH"> </A>
<H2>SEE ALSO</H2>
<A HREF="ppmtoilbm.html">ppmtoilbm</A>,
<A HREF="ppm.html">ppm</A>
<A NAME="lbAI"> </A>
<H2>AUTHORS</H2>
Copyright (C) 1989 by Jef Poskanzer.
<p>Modified October 1993 by Ingo Wilken (<A
HREF="mailto:Ingo.Wilken@informatik.uni-oldenburg.de">Ingo.Wilken@informatik.uni-oldenburg.de</A>)
<HR>
<A NAME="index"> </A><H2>Table Of Contents</H2>
<UL>
<LI><A HREF="#lbAB">NAME</A>
<LI><A HREF="#lbAC">SYNOPSIS</A>
<LI><A HREF="#lbAD">DESCRIPTION</A>
<LI><A HREF="#lbAE">OPTIONS</A>
<LI><A HREF="#lbAF">LIMITATIONS</A>
<LI><A HREF="#lbAG">REFERENCES</A>
<LI><A HREF="#lbAH">SEE ALSO</A>
<LI><A HREF="#lbAI">AUTHORS</A>
</UL>
</BODY>
</HTML>
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