#!/usr/bin/env bash
# This script generates the tiles for the map background

die () {
    echo "$@"
    exit 1
}

MAP=$1
OUT=${2:-public/tiles}

command -v magick || die ImageMagick is required




### zoom0

genforlevel () {
    resized=$(mktemp "/tmp/XXXXXXXX.png")
    mkdir -p $OUT/$1
    printf "Resizing image for zoom level $1... into $resized"
    magick "$1" -resize $((  ))1024x1024 $resized
    printf "Done\n"
    printf "generating tiles for zoom level 0..."
    magick $resized -crop 512x512+0+0 $OUT/0/-1_-1.png
    magick $resized -crop 512x512+512+0 $OUT/0/0_-1.png
    magick $resized -crop 512x512+0+512 $OUT/0/-1_0.png
    magick $resized -crop 512x512+512+512 $OUT/0/0_0.png
    printf "Done\n"
}