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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"><esr@snark.thyrsus.com></A></ADDRESS> |
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