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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-12-25 03:06:05 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2006-12-25 03:06:05 +0000 |
| commit | 1017cbebe5d5edd859e0fddad0a8600f509f4821 (patch) | |
| tree | 78bdf336648566f7a7d55f42837357dea3dd674c /ppmtoilbm.html | |
| parent | 16f2ac126651015a376eba864a3a35f738b0b25a (diff) | |
| download | netpbm-mirror-1017cbebe5d5edd859e0fddad0a8600f509f4821.tar.gz netpbm-mirror-1017cbebe5d5edd859e0fddad0a8600f509f4821.tar.xz netpbm-mirror-1017cbebe5d5edd859e0fddad0a8600f509f4821.zip | |
Place user guide into Subversion repository
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@181 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'ppmtoilbm.html')
| -rw-r--r-- | ppmtoilbm.html | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/ppmtoilbm.html b/ppmtoilbm.html new file mode 100644 index 00000000..b8159e8a --- /dev/null +++ b/ppmtoilbm.html @@ -0,0 +1,217 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN"> +<HTML><HEAD><TITLE>Ppmtoilbm User Manual</TITLE></HEAD> +<BODY> +<H1>ppmtoilbm</H1> +Updated: 31 October 1993 +<BR> +<A HREF="#index">Table Of Contents</A> + +<A NAME="lbAB"> </A> +<H2>NAME</H2> + +ppmtoilbm - convert a PPM image into an ILBM file + +<A NAME="lbAC"> </A> +<H2>SYNOPSIS</H2> + +<B>ppmtoilbm</B> + +[<B>-maxplanes</B>|<B>-mp</B> <I>N</I>] + +[<B>-fixplanes</B>|<B>-fp</B> <I>N</I>] + +[<B>-ham6</B>|<B>-ham8</B>] + +[{<B>-dcbits</B>|<B>-dcplanes</B>} <i>r</i> <i>g</i> <i>b</i>] + +[ +<B>-normal</B>|<B>-hamif</B>|<B>-hamforce</B>|<B>-24if</B>|<B>-24force</B>| +<b>-dcif</b>|<b>-dcforce</B>|<b>-cmaponly</B> +] + +[<B>-ecs</B>|<B>-aga</B>] + +[<B>-compress</B>|<B>-nocompress</B>] + +[<B>-cmethod</B> <I>type</I>] + +[<B>-map</B> <i>ppmfile</i>] + +[<B>-savemem</B>] + +[<B>ppmfile</B>] + +<A NAME="lbAD"> </A> +<H2>DESCRIPTION</H2> + +<p>This program is part of <a href="index.html">Netpbm</a>. + +<p><b>ppmtoilbm</b> reads a PPM image as input. Produces an ILBM file +as output. <b>ppmtoilbm</b> understands the following ILBM types: + +<UL COMPACT> + +<LI>Normal ILBMs with 1-16 planes + +<LI>Amiga HAM with 3-16 planes + +<LI>24 bit + +<LI>Color map (BMHD + CMAP chunk only, nPlanes = 0) + +<LI>Unofficial direct color. 1-16 planes for each color component. + +</ul> + +<p>Chunks written: BMHD, CMAP, CAMG (only for HAM), BODY (not for +colormap files) unofficial DCOL chunk for direct color ILBM. + +<A NAME="lbAE"> </A> +<H2>OPTIONS</H2> + +<p>Options marked with (*) can be prefixed with a "no", +e.g. "-nohamif". All options can be abbreviated to their +shortest unique prefix. + +<DL COMPACT> +<DT><B>-maxplanes</b> | <b>-mp</b> <i>n</i> + +<DD>(default 5, minimum 1, maximum 16) Maximum planes to write in a +normal ILBM. If the pixmap does not fit into <n> planes, +ppmtoilbm writes a HAM file (if -hamif is used), a 24bit file (if +-24if is used) or a direct color file (if -dcif is used) or aborts +with an error. + +<DT><B>-fixplanes</b> | <b>-fp</b> <i>b</i> + +<DD>(min 1, max 16) If a normal ILBM is written, it will have exactly +<n> planes. + +<DT><B>-hambits</b> | <b>-hamplanes</b> <i>n</i> + +<DD>(default 6, min 3, max 16) Select number of planes for HAM +picture. The current Amiga hardware supports 6 and 8 planes, so for +now you should only use this values. + +<DT><B>-normal</B> + +<DD>Turns off -hamif/-24if/-dcif, -hamforce/-24force/-dcforce and +-cmaponly. Also sets compression type to byterun1. + +<p>This is the default. + +<DT><B>-hamif</B> (*) +<DT><B>-24if</B> (*) +<DT><B>-dcif</B> (*) + +<DD>Write a HAM/24bit/direct color file if the image does not fit into +<maxplanes> planes. + +<DT><B>-hamforce</B> (*) +<DT><B>-24force</B> (*) +<DT><B>-dcforce</B> (*) + +<DD>Write a HAM/24bit/direct color file. + +<DT><B>-dcbits</b> <i>r</i> <i>g</i> <i>b</i> +<DT><b>-dcplanes</b> <i>r</i> <i>g</i> <i>b</i> + +<DD>(default 5, min 1, max 16). Select number of bits for red, green +and blue in a direct color ILBM. + +<DT><B>-ecs</B> + +<DD>Shortcut for: -hamplanes 6 -maxplanes 5 + +<p>This is the default. + +<DT><B>-aga</B> + +<DD>Shortcut for: <b>-hamplanes 8 -maxplanes 8</B> + +<DT><B>-ham6</B> + +<DD>Shortcut for: <b>-hamplanes 6 -hamforce</B> + +<DT><B>-ham8</B> + +<DD>Shortcut for: <b>-hamplanes 8 -hamforce</b> + +<DT><B>-compress</B> (*) + +<DD>This is the default. + +<DD>Compress the BODY chunk. The default compression method is +byterun1. Compression requires building the ILBM image in memory; +turning compression off allows stream-writing of the image, but the +resulting file will usually be 30% to 50% larger. Another alternative +is the -savemem option, this will keep memory requirements for +compression at a minimum, but is very slow. + +<DT><B>-cmethod</b> <b>none</b>|<b>byterun1</B> + +<DD>This option does the same thing as <b>-compress</b>. + +<DT><B>-map</b> <i>ppmfile</i> + +<DD>Write a normal ILBM using the colors in <ppmfile> as the +colormap. The colormap file also determines the number of planes, a +<b>-maxplanes</b> or <b>-fixplanes</b> option is ignored. + +<DT><B>-cmaponly</B> + +<DD>Write a colormap file: only BMHD and CMAP chunks, no BODY chunk, +nPlanes = 0. + +<DT><B>-savemem</B> + +<DD>See the <b>-compress</b> option. + +</DL> + + +<A NAME="lbAF"> </A> +<H2>LIMITATIONS</H2> + +<p>HAM pictures will always get a grayscale colormap; a real color +selection algorithm might give better results. On the other hand, +this allows row-by-row operation on HAM images, and all HAM images of +the same depth (no. of planes) share a common colormap, which is +useful for building HAM animations. + +<A NAME="lbAG"> </A> +<H2>REFERENCES</H2> + +Amiga ROM Kernel Reference Manual - Devices (3rd Ed.) +<BR> +Addison Wesley, ISBN 0-201-56775-X + +<A NAME="lbAH"> </A> +<H2>SEE ALSO</H2> + +<A HREF="ppm.html">ppm</A>, +<A HREF="ilbmtoppm.html">ilbmtoppm</A> + +<A NAME="lbAI"> </A> +<H2>AUTHORS</H2> + +<p>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> |