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ppmrainbow - Generate a rainbow
ppmrainbow [-width=number] [-height=number]
[-tmpdir=directory] [-verbose] color ...
All options can be abbreviated to their shortest unique prefix. You may use two hyphens
instead of one to designate an option. You may use either white space or equals signs
between an option name and its value.
ppmrainbow generates a PPM image that fades from one color to another to another from left
to right, like a rainbow. The colors are those you specify on the command line, in that
order. The first color is added again on the right end of the image.
If you want a vertical or other non-horizontal rainbow, run the output through pnmrotate.
One use for such a rainbow is to compose it with another image under an alpha mask in
order to add a rainbow area to another image. In fact, you can make rainbow-colored text
by using pbmtext, pnmcomp, and ppmrainbow.
The width in pixels of the output image.
Default is 600.
The height in pixels of the output image.
Default is 8.
The directory specification of the directory ppmrainbow is to use for temporary
Default is the value of the TMPDIR environment variable, or /tmp if TMPDIR is not
Print the "commands" (invocations of other Netpbm programs) that ppmrainbow uses to
create the image.
ppmmake(1), pnmcomp(1), pbmtext(1), ppmfade(1), ppm(5).
Arjen Bax wrote ppmrainbow in June 2001 and contributed it to the Netpbm package. Bryan
Henderson wrote this man page in July 2001.
1 July 2001 ppmrainbow(1)
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