xgamma


SYNOPSIS
       xgamma  [-display  display]  [-screen  screen]  [-quiet]  [-gamma f.f |
       [[-rgamma f.f] [-ggamma f.f] [-bgamma f.f]]]

DESCRIPTION
       xgamma allows X users to query and alter the gamma correction of a mon-
       itor via the X video mode extension (XFree86-VidModeExtension).

       If  no  value  for  the  gamma  correction  is  given via the -gamma or
       -rgamma/-ggamma/-bgamma options, xgamma prints the current  gamma  cor-
       rection of the display.

OPTIONS
       -display display
               This  argument  allows you to specify the server to connect to;
               see X(7).

       -screen screen
               When multiple displays are configured as a single logical  dis-
               play,  this  option allows you to select the screen you wish to
               change.

       -quiet  Silence the normal output of xgamma

       -help   Print out the `Usage:' command syntax summary.

       -gamma f.f
               The gamma correction can either be defined as a  single  value,
               or  separately  for  the  red,  green and blue components. This
               argument specifies the gamma correction as a single value.

       -rgamma f.f
               This argument specifies the red component of the gamma  correc-
               tion.

       -ggamma f.f
               This  argument  specifies the green component of the gamma cor-
               rection.

       -bgamma f.f
               This argument specifies the blue component of the gamma correc-
               tion.

ENVIRONMENT
       DISPLAY To get default host and display number.

BUGS
       This client changes the internal values of the gamma correction for the
       Xserver. Whether or not these values are respected depends on the video
       drivers.

       The  gamma  values  are  passed to the Xserver with 3 decimal places of
       accuracy.
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