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#!/bin/bash
# Original Inspiration:
# - https://github.com/basecamp/omarchy/issues/2509
# - https://albert.nz/hyprland-brightness
# ---------------------
# Get focused monitor name and serial (single hyprctl call)
get_focused_display() {
local monitor=$(hyprctl monitors -j | jq -r '.[] | select(.focused == true)')
local name=$(echo "$monitor" | jq -r '.name')
local serial=$(echo "$monitor" | jq -r '.serial')
echo "$name $serial"
}
set_brightness_ddcutil() {
local display_serial="$1"
local step="$2"
local direction="$3"
ddcutil \
--noconfig \
--skip-ddc-checks \
--sleep-multiplier=0.1 \
--sn="$display_serial" \
setvcp 10 $direction "$step"
}
set_brightness_brightnessctl() {
local step="$1"
local direction="$2"
brightnessctl set "${step}%${direction}"
}
get_brightness_ddcutil() {
local display_serial="$1"
ddcutil \
--noconfig \
--skip-ddc-checks \
--sleep-multiplier=0.1 \
--sn="$display_serial" \
--terse getvcp 10 \
| awk '{print $4}'
}
get_brightness_brightnessctl() {
brightnessctl -m | cut -d, -f4 | sed 's/%//'
}
# Get current brightness for a specific monitor
get_current_brightness() {
local display_name="$1"
local display_serial="$2"
if [ "$display_name" = "eDP-1" ]; then
get_brightness_brightnessctl
elif [ -n "$display_serial" ]; then
get_brightness_ddcutil "$display_serial"
else
echo "N/A"
fi
}
# Set brightness for a specific monitor
set_brightness() {
local step="$1"
local direction="$2"
read -r display_name display_serial <<< "$(get_focused_display)"
if [ "$display_name" = "eDP-1" ]; then
set_brightness_brightnessctl "$step" "$direction"
local value=$(get_brightness_brightnessctl)
elif [ -n "$display_serial" ]; then
# Hold a single lock across both set and get to prevent races
exec 9>/tmp/ddcutil-brightness.lock
flock -n 9 || return
set_brightness_ddcutil "$display_serial" "$step" "$direction"
local value=$(get_brightness_ddcutil "$display_serial")
exec 9>&-
else
return
fi
notify "$display_serial" "$display_name" "$value"
}
notify() {
local serial="$1"
local name="$2"
local value="$3"
notify-send -e \
-h string:x-canonical-private-synchronous:brightness-"$serial" \
-u low \
"Brightness" \
" $name: ${value}%"
}
STEP="${2:-1}"
case "$1" in
"--get")
read -r display_name display_serial <<< "$(get_focused_display)"
value=$(get_current_brightness "$display_name" "$display_serial")
echo "${value}%"
;;
"--set")
set_brightness "$STEP"
;;
"--inc")
set_brightness "$STEP" +
;;
"--dec")
set_brightness "$STEP" -
;;
*)
echo -e "Usage:"
echo -e " --get to get current brightness value"
echo -e " --set [arg] to set current brightness value to [arg]%"
echo -e " --inc [arg] to increment current brightness value by [arg]%"
echo -e " --dec [arg] to decrement current brightness value by [arg]%"
exit 0
;;
esac
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