xgamma(1) UNIX Programmer's Manual 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 correc-
tion of a monitor via the XFree86 X server video mode exten-
sion (XFree86-VidModeExtension).
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 display, 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 sin-
gle 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 correction.
-ggamma f.f
This argument specifies the green component of the
gamma correction.
-bgamma f.f
This argument specifies the blue component of the
gamma correction.
ENVIRONMENT
DISPLAY To get default host and display number.
BUGS
This client changes the internal values of the gamma correc-
tion for the Xserver. Whether or not these values are
XFree86 Version 4.5.0 1
xgamma(1) UNIX Programmer's Manual xgamma(1)
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 4.5.0 2