NAME
    ppmtoxpm - convert a PPM iamge into an X11 pixmap

SYNOPSIS
    ppmtoxpm [-name=xpmname] [-rgb=rgb-textfile] [-alphamask=pgmfile] [ppm-
    file]

    Minimum unique abbrevations are acceptable.

DESCRIPTION
    Reads a portable pixmap as input. Produces X11 pixmap (version 3) as
    output which can be loaded directly by the XPM library.

    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

OPTIONS
    -name=xpmname
    The -name option allows you 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 you do not specify -name or ppmfile, (i.e. your
    input is from Standad Input), the prefix string defaults to the
    string noname.

    rgb=rgb-textfile
    The -rgb  option allows you to specify an X11 rgb text file for
    the lookup of color name mnemonics. This rgb text file is typi-
    cally 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 you don't specify -rgb or if
    the RGB values don't match, then ppmtoxpm produces the  color
    specifications in the #RGB, #RRGGBB, #RRRGGGBBB, or #RRRRGGGG-
    BBBB hexadecimal format.

    -alphamask=pgmfile
    This option names a PGM file to use as an  alpha (transparency)
    mask. The file must contain an image the same dimensions as the
    input image. ppmtoxpm marks as transparent any pixel  whose
    position in the alpha mask image is at most half white.

    If you don't specify -alphamask, ppmtoxpm makes all pixels in
    the output opaque.

    ppmcolormask is one way to generate an alpha mask file.  You
    might also generate it by extracting transparency information
    from an XPM file with the -alphaout option to xpmtoppm.  There
    are similar options on other Netpbm converters that convert from
    formats that include transparency information too.

LIMITATIONS
    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.

SEE ALSO
   ppmcolormask(1),xpmtoppm(1), ppm(5)
    XPM Manual by Arnaud Le Hors lehors@mirsa.inria.fr

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, pro-
    vided that the above copyright notice appear in all copies and that
    both that copyright notice and this permission notice appear in sup-
    porting 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.

    Upgraded to XPM2 by
  Paul Breslaw, Mecasoft SA, Zurich, Switzerland (paul@mecazh.uu.ch)
  Thu Nov 8 16:01:17 1990

    Upgraded to XPM version 3 by
  Arnaud Le Hors (lehors@mirsa.inria.fr)
  Tue Apr 9 1991