#!/bin/bash

set -euxo pipefail

processimg ()
{
    local src=$1
    local name=$(basename "${src}")
    name="${name%% *}"
    name=${name,}
    local dst=../images/${name}/portrait.png

    magick "${src}" -scale 1200x ${dst}
    for size in 800 400
    do
        magick ${dst} -scale ${size}x ${dst/.png/${size}.png}
    done
}

for img in "$@"
do
    processimg "${img}" &
done

wait