Annotated edit history of
ppmquantall(1) version 1, including all changes.
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perry |
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ppmquantall |
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!!!ppmquantall |
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NAME |
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SYNOPSIS |
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DESCRIPTION |
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SEE ALSO |
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BUGS |
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AUTHOR |
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---- |
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!!NAME |
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ppmquantall - run ppmquant on a bunch of files all at once, so they share a common colormap |
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!!SYNOPSIS |
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__ppmquantall__ [[__-ext__ ''extension''] ''ncolors |
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ppmfile'' ... |
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!!DESCRIPTION |
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Takes a bunch of portable pixmap as input. Chooses |
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''ncolors'' colors to best represent all of the images, |
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maps the existing colors to the new ones, and __overwrites |
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the input files__ with the new quantized |
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versions. |
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If you don't want to overwrite your input files, use the |
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__-ext__ option. The output files are then named the same |
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as the input files, plus a period and the extension text you |
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specify. |
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Verbose explanation: Let's say you've got a dozen pixmaps |
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that you want to display on the screen all at the same time. |
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Your screen can only display 256 different colors, but the |
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pixmaps have a total of a thousand or so different colors. |
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For a single pixmap you solve this problem with |
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''ppmquant''; this script solves it for multiple pixmaps. |
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All it does is concatenate them together into one big |
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pixmap, run ''ppmquant'' on that, and then split it up |
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into little pixmaps again. |
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(Note that another way to solve this problem is to |
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pre-select a set of colors and then use ''ppmquant'''s |
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__-map__ option to separately quantize each pixmap to |
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that set.) |
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!!SEE ALSO |
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ppmquant(1), __ppm(5)__ |
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!!BUGS |
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It's a csh script. Csh scripts are not portable to System V. |
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Scripts in general are not portable to non-Unix |
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environments. |
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!!AUTHOR |
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Copyright (C) 1991 by Jef Poskanzer. |
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