cotemp is a simple program that uses Xrandr to apply a color temperature and/or
brightness on every screen, or by selecting one with -s flag, every 60
seconds (by default).
Depending on the hour and minute defined in a profile, it will switch to that profile using it's respective temperature and brightness.
Profiles are located in config.h.
With no arguments cotemp will start to run (forever).
cotemp [-dlv] [-s screen] [-c crtc] [-t temperature] [-b brightness] [-p profile]
For a more detail information read the man page.
Edit config.mk to match your local setup (cotemp is installed into the /usr/local namespace by default).
Afterwards enter the following command to build and install cotemp (if necessary as root):
make clean install
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This is a fork of sct which implemented a lot of things like:
- Aproximation of the table of resfhit
- iterate over all screens
- clean up code
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Original code was published by Ted Unangst in the public domain: https://www.tedunangst.com/flak/post/sct-set-color-temperature
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The following website by Mitchell Charity provides a table for the conversion between black-body temperatures and color pixel values: http://www.vendian.org/mncharity/dir3/blackbody/