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<?php
/**
* BaconQrCode
*
* @link http://github.com/Bacon/BaconQrCode For the canonical source repository
* @copyright 2013 Ben 'DASPRiD' Scholzen
* @license http://opensource.org/licenses/BSD-2-Clause Simplified BSD License
*/
namespace BaconQrCode\Renderer\Color;
use BaconQrCode\Exception;
/**
* Gray color.
*/
class Gray implements ColorInterface
{
/**
* Gray value.
*
* @var integer
*/
protected $gray;
/**
* Creates a new gray color.
*
* A low gray value means black, while a high value means white.
*
* @param integer $gray
*/
public function __construct($gray)
{
if ($gray < 0 || $gray > 100) {
throw new Exception\InvalidArgumentException('Gray must be between 0 and 100');
}
$this->gray = (int) $gray;
}
/**
* Returns the gray value.
*
* @return integer
*/
public function getGray()
{
return $this->gray;
}
/**
* toRgb(): defined by ColorInterface.
*
* @see ColorInterface::toRgb()
* @return Rgb
*/
public function toRgb()
{
return new Rgb($this->gray * 2.55, $this->gray * 2.55, $this->gray * 2.55);
}
/**
* toCmyk(): defined by ColorInterface.
*
* @see ColorInterface::toCmyk()
* @return Cmyk
*/
public function toCmyk()
{
return new Cmyk(0, 0, 0, 100 - $this->gray);
}
/**
* toGray(): defined by ColorInterface.
*
* @see ColorInterface::toGray()
* @return Gray
*/
public function toGray()
{
return $this;
}
}
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