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<CENTER><H1>gifclip</H1></CENTER>

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 <a href="gifpos.html">gifpos</a> for that).<P>

<H1>Usage:</H1>

<pre>
gifclip [-q] [-i Xmin Ymin Xmax Ymax] [-n n Xmin Ymin Xmax Ymax] [-c] [-h] gif-file
</pre>

If no gif-file is given, GifClip will try to read a GIF file from stdin.<P>

<H1>Memory required:</H1>

Line.

<H1>Options:</H1>

<DL>
<DT> [-q]
<DD> Quiet mode.  Default off on MSDOS, on under UNIX.  Controls printout
   of running scan lines.  Use -q- to invert.<P>

<DT> [-i Xmin Ymin Xmax Ymax]
<DD> Clip first image to the dimensions as specified
   by the 4 coordinates (Xmin Ymin Xmax Ymax) of a box clipping region.<P>

   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.<P>

   If the first parameter is bigger than third one (Xmin > Xmax) they are
   swapped.  Same for Y.<P>

   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).<P>

   Only one of -i or -n can be specified.<P>

<DT> [-n n Xmin Ymin Xmax Ymax]
<DD> 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.<P>

<DT> [-c]
<DD> 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.<P>

<DT> [-h]
<DD> Print one line of command line help, similar to Usage above.<P>
</DL>

Note: all coordinates are 0-based --- the top left corner is (0, 0).<P>

<H1>Author:</H1>

Gershon Elber

<HR>
<ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com">&lt;esr@snark.thyrsus.com&gt;</A></ADDRESS>
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