Simple utility that inverts colors on all screens, using XrandR.
- XrandR development files (
apt-get install libxcb-randr0-dev)
From a terminal, type make
Run xrandr-invert-colors.bin for inverting colors on all screens.
The follwing program option is implemented:
-s <crtc_number>: Instead of inverting all screens, invert only the colors of the screen identified by<crtc_number>.--helpand-h: Print a short help for the program.--version: Print a (dummy) version information.-d: Enables debug log on standard output. Prints diagonstic messages.
Hint: put the executable in the a directory listed in $PATH, and bind the execution of xrandr-invert-colors.bin to a shortcut key.
Redshift developers, for creating the XRandR gamma setting code. Their code is reused in this application. http://jonls.dk/redshift/ https://launchpad.net/redshift
xcalib -i -a: Inverts the colors of the current screen.- Note that as of date of last testing (2014, xcalib version 0.8) xcalib has not been able to invert the colors on all monitors in a multi-monitor setup, because all monitors are presented by the X11 server as a single screen. Thus this limitation is coming from the X11 server.
xrandr-invert-colorsdoes not have this limitation, because it uses XRandR API, which correctly handles all attached monitors.
- Note that as of date of last testing (2014, xcalib version 0.8) xcalib has not been able to invert the colors on all monitors in a multi-monitor setup, because all monitors are presented by the X11 server as a single screen. Thus this limitation is coming from the X11 server.
GNU GPL v3