ppmtogif

ppmtogif - convert a portable pixmap into a GIF file

ppmtogif [-interlace] [-sort] [-map mapfile] [−transparent color] [ppmfile]

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

-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 software.

All flags can be abbreviated to their shortest unique prefix.

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

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

Copyright (C) 1989 by Jef Poskanzer.