NAME

       ppmrainbow - Generate a rainbow

SYNOPSIS

       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.

DESCRIPTION

       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.

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 ppmrainbow 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 ALSO

       ppmmake(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.

                                           1 July 2001                              ppmrainbow(1)