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gifflip
A program to flip (mirror) GIF file along X or Y axes, or rotate the GIF
file 90 degrees to the left or to the right.
Usage:
gifflip [-q] [-r] [-l] [-x] [-y] [-h] gif-file
If no gif-file is given, GifFlip will try to read a GIF file from stdin.
Memory required:
Image.
Options:
-  [-q]
-  Quiet mode. Default off on MSDOS, on under UNIX.  Controls printout
   of running scan lines.  Use -q- to invert.
 
-  [-r]
-  Rotate the GIF file to the right.
 
-  [-l]
-  Rotate the GIF file to the left.
 
-  [-x]
-  Mirror the GIF file along the X axis.  Very useful if GIF file was
   created from another format in with the first line in at image bottom.
   Effectively exchanges first row with last.
 
-  [-y]
-  Mirror the GIF file along Y axis.
   Effectively exchanges first column with last.
 
-  [-h]
-  Print one line of command line help, similar to Usage above.
 
Author:
Gershon Elber
Eric S. Raymond <esr@snark.thyrsus.com>