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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).
- -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. 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.
- 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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