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xgamma(1)                                                            xgamma(1)




NAME

       xgamma - Alter a monitor's gamma correction for XFree86


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 XFree86 X server video mode extension (XFree86-VidModeEx-
       tension).


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. If
               no value for the gamma correction is given xgamma  returns  the
               current gamma correction of the display.


       -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.


SEE ALSO

       xvidtune(1)


AUTHORS

       Kaleb S. Keithley, X Consortium.
       David Dawes, David Bateman



XFree86                          Version 4.4.0                       xgamma(1)

Mac OS X 10.4 X11 - Generated Sat Apr 30 05:01:11 CDT 2005