NAME

       pamgradient - create a four-corner gradient PAM image

SYNOPSIS

       pamgradient [-maxval=maxval] color-tl color-tr color-bl color-br width height

       Minimum unique abbreviation of option is acceptable.  You may use double hyphens instead of single hyphen
       to  denote  options.  You may use white space in place of the equals sign to separate an option name from
       its value.

DESCRIPTION

       This program is part of Netpbm(1).

       pamgradient creates an image of the specified dimensions width by height which contains  a  smooth,  two-
       dimensional gradient between the specified colors of the four corners (from top left to bottom right).

       Specify the colors as described for the argument of the pnm_parsecolor() library routine .

       If  all  four  colors  are gray values, pamgradient creates a grayscale image (PAM tuple type GRAYSCALE).
       Otherwise, it creates a color image (PAM tuple type RGB).

OPTIONS

       In addition to the options common to all programs based on libnetpbm (most notably  -quiet,  see   Common
       Options ), pamgradient recognizes the following command line option:

       -maxval=maxval

              maxval of the generated image.  (See PAM(1) and PNM(1) specifications).

SEE ALSO

       pamgradient(1), ppmmake(1), ppmrainbow(1), pgmramp(1), ppmpat(1), pam(1), pnm(1)

NOTE

       Only  the  top  left corner of the generated image has exactly the specified color.  The color of the top
       right corner is a bit shifted to the left, the bottom left corner a bit up, and the bottom  right  corner
       left  and  up. This ensures nice transitions when combining adjacent (very narrow) gradients, and doesn't
       play a role when the gradient butts against a solid surface.

       This effect is created by the integer arithmetic used for the interpolation  of  the  color  values,  and
       since it doesn't make a difference for all practical purposes I might as well sell it as a feature.

HISTORY

       pamgradient was new in Netpbm 10.31 (December 2005).

AUTHOR

       pamgradient was written by Daniel Haude in October 2005.

DOCUMENT SOURCE

       This  manual  page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation
       is at

              http://netpbm.sourceforge.net/doc/pamgradient.html

netpbm documentation                             21 October 2005                      Pamgradient User Manual(1)