<?php
declare(strict_types = 1);
namespace BaconQrCode\Renderer\Color;
use BaconQrCode\Exception;
final class Gray implements ColorInterface
{
/**
* @var int
*/
private $gray;
/**
* @param int $gray the gray value between 0 (black) and 100 (white)
*/
public function __construct(int $gray)
{
if ($gray < 0 || $gray > 100) {
throw new Exception\InvalidArgumentException('Gray must be between 0 and 100');
}
$this->gray = (int) $gray;
}
public function getGray() : int
{
return $this->gray;
}
public function toRgb() : Rgb
{
return new Rgb((int) ($this->gray * 2.55), (int) ($this->gray * 2.55), (int) ($this->gray * 2.55));
}
public function toCmyk() : Cmyk
{
return new Cmyk(0, 0, 0, 100 - $this->gray);
}
public function toGray() : Gray
{
return $this;
}
}