<!doctype HTML public "-//W3O//DTD W3 HTML 2.0//EN"> <HTML> <HEAD> <TITLE>gifclip</TITLE> <link rev=made href=mailto:esr@snark.thyrsus.com> </HEAD> <BODY> Go to <a href="index.html">index page</a>. <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"><esr@snark.thyrsus.com></A></ADDRESS> </BODY> </HTML>
