NAME
gifclrmp - extract colormaps from GIF images
SYNOPSIS
gifclrmp [-v] [-s] [-l mapfile] [-t trans] [-g gamma] [-i image] [-h] [gif-file]
DESCRIPTION
A program to modify GIF image colormaps. Any local colormap in a GIF file can be modified at a time, or the global screen one.
OPTIONS
- -v
-
Verbose mode (show progress). Enables printout of running scan lines.
- -s
-
Select the global screen color map.
- -l mapfile
-
Load color map from this file instead of selected color map.
- -t trans
-
Change color index values. The change is made to both the selected color table and the raster bits of the selected image. A translation file is a list of pairs of `before' and `after' index values. At present, the `before' index values must be in ascending order starting from 0.
- -g gamma
-
Apply gamma correction to selected color map.
- -i image
-
Select the color map of the numbered image.
- -h
-
Print one command line help, similar to Usage above.
If no GIF file is given, gifclip will try to read a GIF file from stdin.
NOTES
• The default operation is to dump out the selected color map in text format.
• The file to load/dump is simply one color map entry per line. Each such entry line has four integers: "ColorIndex Red Green Blue", where color index is in ascending order starting from 1.
AUTHOR
Gershon Elber.