ppmrainbow(1)

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)

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Free and Open Source Software