#!/bin/bash
wall_dir="${1:?wallpaper directory required}"
img=$(find "$wall_dir" -type f \( -iname "*.jpg" -o -iname "*.jpeg" -o -iname "*.png" \) | shuf -n1)
swaymsg -q output DP-1 adaptive_sync off            # lock screen redraws rarely: fixed 240 Hz
swaylock -f ${img:+-i "$img"}
# once unlocked, let vrr-follow decide again (in background so swayidle/suspend aren't held up)
( while pgrep -x swaylock >/dev/null; do sleep 1; done
  ~/.config/sway/scripts/vrr-follow once ) &