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 for that).
Verbose mode. Enables printout of running scan lines.
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.
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.
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.
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.