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xgamma - Alter a monitor's gamma correction for
XFree86
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 XFree86 X
server 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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