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xgamma - Alter a monitor's gamma correction through
the X server
xgamma [-display display] [-screen screen] [-quiet] [-gamma
f.f | [[-rgamma f.f] [-ggamma f.f] [-bgamma f.f]]]
xgamma allows X users
to query and alter the gamma correction of a monitor 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 correction of the display.
- -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.
- DISPLAY
- To get default
host and display number.
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.
xvidtune(1)
Kaleb S. Keithley,
X Consortium.
David Dawes, David Bateman
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