Screen locking script for swaylock.

scr-lock.fish

#!/usr/bin/env fish

# You need sway, swaylock, grim, imagemagick, jq and parallel.

set SCREEN (swaymsg -t get_outputs | jq -r .[].name)
for s in $SCREEN;
	set -l img /tmp/lock-$s.jpg
	set -a IMG $img
	set -a PARAMS "-i $s:$img"
end

parallel "grim -o {1} -t ppm -s 0.3 - | convert - -filter Gaussian -define filter:sigma=3.5 -resize 200% {2}" \
	 ::: $SCREEN :::+ $IMG

swaylock -lF -s fill -c 000000 (echo $PARAMS | string split " ")
rm -- $IMG