GIFCLIP(1) GIFLIB Documentation GIFCLIP(1)NAMEgifclip - clip a region from a GIF
SYNOPSISgifclip [-v] [-i xmin ymin xmax ymax] [-n n xmin ymin xmax ymax] [-c]
[-h] [gif-file]
DESCRIPTION
A program to clip images in GIF files. Only one image in a GIF file can
be modified at a time. Neither the image position on screen nor the
screen size is modified (use gifpos[1] for that).
OPTIONS-v
Verbose mode. Enables printout of running scan lines.
-i xmin ymin xmax max
Clip first image to the dimensions as specified by the 4
coordinates (Xmin Ymin Xmax Ymax) of a box clipping region.
For example: '-i 11 22 33 44' will crop the box from top left
[11,22] to bottom right [33,44] out of the first image.
If the first parameter is bigger than third one (Xmin > Xmax) they
are swapped. Same for Y.
The dimensions of the clipped image must be confined to original
image width and height. Note the clipped image includes both the
min & max boundary; an image of width W can have coordinates 0 to
W-1 (zero based).
Only one of -i or -n can be specified.
-n n xmin ymin xmax ymax
Same as -i above but for the nth image: `-n 1 11 22 33 44' is
exactly the same as the example in -i. Only one of -i or -n can be
specified.
-c
Complement. This removes horizontal and/or vertical bands of the
image. For example `-c -i 638 3 658 13' would remove a horizontal
band 11 pixels deep beginning at raster line 3, and a vertical band
21 pixels right beginning at pixel 658.
-h
Print one line of command line help, similar to Usage above.
Note: all coordinates are 0-based --- the top left corner is (0, 0).
If no GIF file is given, gifclip will try to read a GIF file from
stdin.
AUTHOR
Gershon Elber.
NOTES
1. gifpos
[set $man.base.url.for.relative.links]/gifpos.html
GIFLIB 2 May 2012 GIFCLIP(1)
