Developer's Daily | Unix by Example |
main | java | perl | unix | dev directory | web log |
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. |