bright

#!/bin/bash -l

for i; do case $i in --help|-help|-h|h|help) sed $0 -e /note[s]/q; exit 0 ;; esac done

_xrandr-brightness () { xrandr --output `_xrandr-primary-output` --brightness ${1:-0.7}; }
_xrandr-primary-output () { xrandr | awk '
		 $2 ~ /^connected/ { monitor[i++]=$1  } END { if (i==1) { print monitor[0]}  }
		 $0 ~ /connected primary/ { print $1; exit}' | sort -u ; }


if [[ $0 =~ dim ]]; then fraction=${1:-0.7}; percent=`imath $fraction x100`
else                     fraction=1.0;       percent=100
fi

## one should work.
sudo xbacklight -set $percent%
sudo light -A $percent
_xrandr-brightness $fraction

## notes

# (I think...)
#dev-libs/light
#     Available versions:  1.2.2-r2{tbz2} {udev}
#     Homepage:            https://github.com/haikarainen/light
#     Description:         A program to control backlights (and other hardware lights)

# 2020-10
# Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767
# HDMI-0 disconnected (normal left inverted right x axis y axis)
# DP-0 connected (normal left inverted right x axis y axis)
#    3840x2160     60.00 +  29.98    24.00
#    1024x768      60.00
#    800x600       60.32
#    640x480       59.94
# DP-1 disconnected (normal left inverted right x axis y axis)
# DP-2 connected primary 2560x1440+0+0 (normal left inverted right x axis y axis) 700mm x 390mm
#    2560x1440     59.95 + 143.91*  120.00    99.95
#    1920x1080    119.88    60.00    59.94    50.00
#    1280x1440     59.91
#    1280x1024     75.02    60.02
#    1280x720      59.94    50.00
#    1024x768     119.99    99.97    75.03    70.07    60.00
#    800x600      119.97    99.66    75.00    72.19    60.32    56.25
#    720x576       50.00
#    720x480       59.94
#    640x480      119.52    99.77    75.00    72.81    59.94    59.93
# DP-3 disconnected (normal left inverted right x axis y axis)
# HDMI-1 disconnected (normal left inverted right x axis y axis)
# USB-C-0 disconnected (normal left inverted right x axis y axis)