<?php

/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
*/

declare(strict_types=1);

namespace pocketmine\world\format\io;

use function chr;
use function str_repeat;

class ChunkUtils{

	/**
	 * Converts pre-MCPE-1.0 biome color array to biome ID array.
	 *
	 * @param int[] $array of biome color values
	 * @phpstan-param array<int, int> $array
	 */
	public static function convertBiomeColors(array $array) : string{
		$result = str_repeat("\x00", 256);
		foreach($array as $i => $color){
			$result[$i] = chr(($color >> 24) & 0xff);
		}
		return $result;
	}

}