#!/bin/sh

# term lock
if [ -z "$DISPLAY" ]; then
	lock -npv
	exit
fi

# xorg lock
img=~/tmp/lock.png
if [ -f "$img" ]; then
	# rudimentary attempt to prevent multiple locks
	# XXX: could block lock and replace with malicious locker
	echo "Lock file exists at '$img', exiting"
	exit 1
fi
res="$(xdpyinfo | grep dimensions | awk '{print $2}')"
scale=0.07
ffmpeg -y -loglevel 0 \
  -s "$res" -f x11grab -i $DISPLAY -i ~/share/l/overlay.png \
  -filter_complex "
    [0]
      scale=iw * $scale:ih * $scale,
      noise=alls=2,
      scale=`echo $res | tr x :`:flags=neighbor,
      noise=alls=5,
      gblur=8
      [composite];
    [composite]
      [1] overlay=x=(main_w - overlay_w) / 2 + 0.5:
                  y=(main_h - overlay_h) / 2
      [out]" \
  -map "[out]" -vframes 1 "$img"
# pause dunst
killall -USR1 dunst
i3lock -nefi "$img"
rm "$img"
killall -USR2 dunst