NAME
xgamma - Alter a monitor's gamma correction through the X server
SYNOPSIS
xgamma
[-display _d_i_s_p_l_a_y] [-screen _s_c_r_e_e_n] [-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).
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.
OPTIONS
-
-display _d_i_s_p_l_a_y
-
This argument allows you to specify the server to connect to; see _X_(_7_).
-
-screen _s_c_r_e_e_n
-
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.
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
xvidtune(1)
AUTHORS
Kaleb S. Keithley, X Consortium.
David Dawes, David Bateman