NAME¶
xgamma - Alter a monitor's gamma correction through the X server
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
monitor via the X video mode extension (XFree86-VidModeExtension).
Note that the
xgamma utility is obsolete and deficient,
xrandr
should be used with drivers that support the
XRandr extension.
If no value for the gamma correction is given via the
-gamma or
-rgamma/
-ggamma/
-bgamma options,
xgamma prints the
current gamma correction 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
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 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
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 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),
xrandr(1)
AUTHORS¶
Kaleb S. Keithley, X Consortium.
David Dawes, David Bateman