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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2008-10-29 18:08:58 +0000 |
|---|---|---|
| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2008-10-29 18:08:58 +0000 |
| commit | fdfe62cfa8e7b87a2bd7ee8285be880f4927752f (patch) | |
| tree | e8b3062cb45040855e539d43d8ab74d213f4c9a2 /ppmtobmp.html | |
| parent | f479e6f45b2cd8dc7006646812a88b24bb6089c0 (diff) | |
| download | netpbm-mirror-fdfe62cfa8e7b87a2bd7ee8285be880f4927752f.tar.gz netpbm-mirror-fdfe62cfa8e7b87a2bd7ee8285be880f4927752f.tar.xz netpbm-mirror-fdfe62cfa8e7b87a2bd7ee8285be880f4927752f.zip | |
"miscellaneous update"
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@765 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'ppmtobmp.html')
| -rw-r--r-- | ppmtobmp.html | 74 |
1 files changed, 51 insertions, 23 deletions
diff --git a/ppmtobmp.html b/ppmtobmp.html index ca6717c4..2cd16d42 100644 --- a/ppmtobmp.html +++ b/ppmtobmp.html @@ -2,17 +2,15 @@ <HTML><HEAD><TITLE>Ppmtobmp User Manual</TITLE> </HEAD><BODY> <H1>ppmtobmp</H1> -Updated: 13 June 2000 +Updated: 29 October 2008 <BR> <A HREF="#index">Table Of Contents</A> -<A NAME="lbAB"> </A> <H2>NAME</H2> ppmtobmp - convert a PPM image into a BMP file -<A NAME="lbAC"> </A> -<H2>SYNOPSIS</H2> +<H2 id="synopsis">SYNOPSIS</H2> <B>ppmtobmp</B> @@ -22,6 +20,8 @@ ppmtobmp - convert a PPM image into a BMP file [<B>-bpp=</B><I>bits_per_pixel</I>] +[<b>-mapfile=</b><i>filename</i>] + [<I>ppmfile</I>] <p>Minimum unique abbreviation of option is acceptable. You may use double @@ -29,16 +29,14 @@ hyphens instead of single hyphen to denote options. You may use white space in place of the equals sign to separate an option name from its value. -<A NAME="lbAD"> </A> -<H2>DESCRIPTION</H2> +<H2 id="description">DESCRIPTION</H2> <p>This program is part of <a href="index.html">Netpbm</a>. <p><b>ppmtobmp</b> reads a PPM image as input and produces a Microsoft Windows or OS/2 BMP file as output. -<A NAME="lbAE"> </A> -<H2>OPTIONS</H2> +<H2 id="options">OPTIONS</H2> <DL COMPACT> <DT><B>-windows</B> @@ -61,11 +59,43 @@ too small to represent all the colors in the input image, <B>ppmtobmp</B> tells you and terminates. You can use <B>pnmquant</B> or <B>ppmdither</B> to reduce the number of colors in the image. +<dt><b>-mapfile=</b><i>filename</i> + +<dd>This identifies a file to use as the BMP palette (aka +"colormap"). In one BMP subformat, the BMP stream contains +a palette of up to 256 colors, and represents the image raster as +indices into that palette. Normally, <b>ppmtobmp</b> takes care of +computing a suitable palette, but if you are going to dissect the BMP +output in some way, you may want certain values for the palette +indices. E.g. you might want red to be 13, where <b>ppmtobmp</b> +would (arbitrarily) choose 39. In that case, you can construct the +palette yourself and use this option to tell <b>ppmtobmp</b> to use +your palette. + +<p>This option does <em>not</em> control what colors are in the +output. The colors in the output are exactly those in the input, and +the palette you supply must contain at least all the colors that are +in the input. You can use <b>pnmremap</b> to adjust your input image +so that it contains only colors from your palette. + +<p>The palette file is a Netpbm format file with one pixel per +palette entry. Each pixel must have a distinct color (no repeats). +The order of the BMP palette <b>ppmtobmp</b> generates is the order +of the pixels in the palette file, going from top to bottom, left +to right. + +<p>A BMP palette may have at most 256 colors, so the palette file +must have at most 256 pixels. + +<p>You may find <b>pnmcolormap</b> useful in generating the palette +file. <b>pgmramp</b> too. + +<p>This option was new in Netpbm 10.45 (December 2008). + </DL> -<A NAME="lbAF"> </A> -<H2>NOTES</H2> +<H2 id="notes">NOTES</H2> <P>To get a faithful reproduction of the input image, the maxval of the input image must be 255. If it is something else, @@ -75,8 +105,7 @@ in the input. <P>Windows icons are not BMP files. Use <B>ppmtowinicon</B> to create those. -<A NAME="lbAG"> </A> -<H2>SEE ALSO</H2> +<H2 id="seealso">SEE ALSO</H2> <B><A HREF="bmptoppm.html">bmptoppm</A></B>, @@ -86,24 +115,23 @@ create those. <B><A HREF="ppmdither.html">ppmdither</A></B>, +<B><A HREF="pnmremap.html">pnmremap</A></B>, + <B><A HREF="ppm.html">ppm</A></B> -<A NAME="lbAH"> </A> -<H2>AUTHOR</H2> +<H2 id="author">AUTHOR</H2> Copyright (C) 1992 by David W. Sanderson. <HR> -<A NAME="index"> </A> -<H2>Table Of Contents</H2> +<H2 id="index">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">NOTES</A> -<LI><A HREF="#lbAG">SEE ALSO</A> -<LI><A HREF="#lbAH">AUTHOR</A> +<LI><A HREF="#synopsis">SYNOPSIS</A> +<LI><A HREF="#description">DESCRIPTION</A> +<LI><A HREF="#options">OPTIONS</A> +<LI><A HREF="#notes">NOTES</A> +<LI><A HREF="#seealso">SEE ALSO</A> +<LI><A HREF="#author">AUTHOR</A> </UL> </BODY> </HTML> |