transgif(documentation for version
note: this document automatically extracted from the source itself.
I wrote this because people ask for something like this all the time.
I just learned the format of GIFs a week ago, so this will likely be
lacking in many respects.
transgif [options] regular.gif > transparent.gif
cat regular.gif | transgif [options] transparent.gif
The default is that whatever color happens to fall into the first colormap
slot (often black) will be made transparent. This can be changed via the
The options are from:
-p print the colormap (to STDERR).
The new gif still goes to STDOUT.
-### make colormap index-### transparent (default is -0)
-rgb ## ## ## Take the three numbers as R G B values (in the range
of 0..255 (or 0x00..0xff). The first colormap entry
with those RGB values is made transparent.
-rgb name Use the R G B values of the color 'name' if known
by this program (data from X11's rgb.txt)
COLORNUM is the index of the color entry to make transparent, and
defaults to zero. For those that like the looks of it, you can put
a leading '-'.
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