ppmtogif(1)

NAME

       ppmtogif - convert a portable pixmap into a GIF file

SYNOPSIS

       ppmtogif [-interlace] [-sort] [-map mapfile] [-transparent color] [ppm-
       file]

DESCRIPTION

       Reads a portable pixmap as input.  Produces a GIF file as output.

OPTIONS

       -interlace
              Tells the program to produce an interlaced GIF file.

       -sort  Produces a GIF file with a sorted color map.

       -map   mapfile

              Uses the colors found in the mapfile to create the  colormap  in
              the  GIF  file, instead of the colors from ppmfile.  The mapfile
              can be any ppm file; all that matters is the colors  in  it.  If
              the  colors  in ppmfile do not match those in mapfile , they are
              matched to a  "best  match".  A  (much)  better  result  can  be
              obtained by using the following filter in advance:

              ppmquant -floyd -map mapfile

       -transparent color
              Mark  the given color as transparent in the GIF file.  The color
              is specified as in ppmmake(1).  Note that this option outputs  a
              GIF89a  format  file which might not be understood by your soft-
              ware.

       All flags can be abbreviated to their shortest unique prefix.

SEE ALSO

       giftoppm(1), ppmquant(1), ppm(5)

AUTHOR

       Based on GIFENCOD by David Rowley <mgardi@watdcsu.waterloo.edu>.   Lem-
       pel-Ziv compression based on "compress".

       Copyright (C) 1989 by Jef Poskanzer.

                                 30 June 1993                      ppmtogif(1)