Screen locking script for swaylock.

scr-lock.fish

#!/usr/bin/env fish

# You need wlr-randr, grim, imagemagick, jq and parallel.

set SCREENS (wlr-randr --json | jq -r .[].name)
for scr in $SCREENS
    set -l img /tmp/lock-$scr.jpg
    set -a IMGS $img
    set -a PARAMS "-i $scr:$img"
end

#echo "Params: $PARAMS"
#echo "Images: $IMGS"

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

echo "Locking..."
swaylock \
    --daemonize \
    --indicator-caps-lock \
    --show-failed-attempts \
    --scaling fill --color 000000 \
    (echo $PARAMS | string split " ")

rm -- $IMGS