#!/bin/bash

images=()
swaylock_args=()

swaylock_args+=(-e)

for output in $(swaymsg -t get_outputs | jq -r '.[] .name'); do
  image=$(mktemp --suffix=.png)
  images+=($image)
  swaylock_args+=(-i $output:$image)
  grim -o $output $image
done

printf '%s\n' "${images[@]}" | xargs -P 0 -I{} convert -resize 20% -level 0%,100%,0.9 -blur 0x2 -resize 500% {} {}

physlock -l  prevent tty switching
swaylock ${swaylock_args[@]} -s center
physlock -L  reenable tty switching
rm ${images[@]}