ppmrainbow(1)ppmrainbow(1)NAMEppmrainbow - Generate a rainbow
SYNOPSISppmrainbow [-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 desig
nate an option. You may use either white space or equals
signs between an option name and its value.
DESCRIPTIONppmrainbow 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.
OPTIONS-width number
The width in pixels of the output image.
Default is 600.
-height number
The height in pixels of the output image.
Default is 8.
-tmpdir
The directory specification of the directory ppm
rainbow is to use for temporary files.
Default is the value of the TMPDIR environment
variable, or /tmp if TMPDIR is not set.
-verbose
Print the "commands" (invocations of other Netpbm
programs) that ppmrainbow uses to create the image.
SEE ALSOppmmake(1), pnmcomp(1), pbmtext(1), ppmfade(1), ppm(5).
AUTHOR
Arjen Bax wrote ppmrainbow in June 2001 and contributed it
to the Netpbm package. Bryan Henderson wrote this man
page in July 2001.
