ppmtoxpm

Section: User Commands (1)
Updated: 13 February 1990
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NAME

ppmtoxpm - convert a portable pixmap into an X11 pixmap

SYNOPSIS

ppmtoxpm [-name <xpmname>] [-rgb <rgb-textfile>] [<ppmfile>]

DESCRIPTION

Reads a portable pixmap as input. Produces X11 pixmap (XPM) as output.

The -name option allows one to specify the prefix string which is printed in the resulting XPM output. If not specified, will default to the filename (without extension) of the <ppmfile> argument. If -name is not specified and <ppmfile> is not specified (i.e. piped input), the prefix string will default to the string "noname".

The -rgb option allows one to specify an X11 rgb text file for the lookup of color name mnemonics. This rgb text file is typically the /usr/lib/X11/rgb.txt of the MIT X11 distribution, but any file using the same format may be used. When specified and a RGB value from the ppm input matches a RGB value from the <rgb-textfile>, then the corresponding color name mnemonic is printed in the XPM's colormap. If -rgb is not specified, or if the RGB values don't match, then the color will be printed with the #RGB, #RRGGBB, #RRRGGGBBB, or #RRRRGGGGBBBB hexadecimal format.

All flags can be abbreviated to their shortest unique prefix.

For example, to convert the file "dot" (found in /usr/include/X11/bitmaps), from xbm to xpm one could specify

: xbmtopbm dot | ppmtoxpm -name dot

or, with a rgb text file (in the local directory)

: xbmtopbm dot | ppmtoxpm -name dot -rgb rgb.txt

BUGS

An option to match the closest (rather than exact) color name mnemonic from the rgb text would be a desirable enhancement.

Truncation of the least significant bits of a RGB value may result in nonexact matches when performing color name mnemonic lookups.

AUTHOR

Copyright (C) 1990 by Mark W. Snitily. Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty. This tool was developed for Schlumberger Technologies, ATE Division, and with their permission is being made available to the public with the above copyright notice and permission notice.

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Time: 12:23:23 GMT, February 26, 2023