man xgamma () - Alter a monitor's gamma correction through the X server
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).
OPTIONS
- -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.
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
AUTHORS
Kaleb S. Keithley, X Consortium.
David Dawes, David Bateman