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76 lines
2.2 KiB
HTML
76 lines
2.2 KiB
HTML
<!doctype HTML public "-//W3O//DTD W3 HTML 2.0//EN">
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<HTML>
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<HEAD>
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<TITLE>gifclip</TITLE>
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<link rev=made href=mailto:esr@snark.thyrsus.com>
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</HEAD>
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<BODY>
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Go to <a href="index.html">index page</a>.
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<CENTER><H1>gifclip</H1></CENTER>
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A program to clip images in GIF files. Only one image in a GIF file can be
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modified at a time. Neither the image position on screen nor the screen size
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is modified (use <a href="gifpos.html">gifpos</a> for that).<P>
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<H1>Usage:</H1>
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<pre>
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gifclip [-q] [-i Xmin Ymin Xmax Ymax] [-n n Xmin Ymin Xmax Ymax] [-c] [-h] gif-file
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</pre>
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If no gif-file is given, GifClip will try to read a GIF file from stdin.<P>
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<H1>Memory required:</H1>
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Line.
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<H1>Options:</H1>
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<DL>
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<DT> [-q]
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<DD> Quiet mode. Default off on MSDOS, on under UNIX. Controls printout
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of running scan lines. Use -q- to invert.<P>
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<DT> [-i Xmin Ymin Xmax Ymax]
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<DD> Clip first image to the dimensions as specified
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by the 4 coordinates (Xmin Ymin Xmax Ymax) of a box clipping region.<P>
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For example: '-i 11 22 33 44' will crop the box from top left [11,22]
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to bottom right [33,44] out of the first image.<P>
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If the first parameter is bigger than third one (Xmin > Xmax) they are
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swapped. Same for Y.<P>
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The dimensions of the clipped image must be confined to original image
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width and height. Note the clipped image includes both the min & max
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boundary; an image of width W can have coordinates 0 to W-1 (zero based).<P>
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Only one of -i or -n can be specified.<P>
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<DT> [-n n Xmin Ymin Xmax Ymax]
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<DD> Same as -i above but for the nth image:
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`-n 1 11 22 33 44' is exactly the same as the example in -i. Only one of
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-i or -n can be specified.<P>
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<DT> [-c]
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<DD> Complement. This removes horizontal and/or vertical bands of the
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image. For example `-c -i 638 3 658 13' would remove a horizontal band
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11 pixels deep beginning at raster line 3, and a vertical band 21 pixels
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right beginning at pixel 658.<P>
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<DT> [-h]
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<DD> Print one line of command line help, similar to Usage above.<P>
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</DL>
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Note: all coordinates are 0-based --- the top left corner is (0, 0).<P>
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<H1>Author:</H1>
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Gershon Elber
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<HR>
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<ADDRESS>Eric S. Raymond <A HREF="mailto:esr@thyrsus.com"><esr@snark.thyrsus.com></A></ADDRESS>
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</BODY>
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</HTML>
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