xgamma
allows X users to query and alter the gamma correction of a monitor via
the X video mode extension (XFree86-VidModeExtension).
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. 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.
