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<?php
namespace Grafika;
/**
* Holds the color information.
* @package Grafika
*/
class Color {
/**
* @var string Hex string: #FFFFFF
*/
protected $hexString;
/**
* @var float Transparency value 0-1
*/
protected $alpha;
/**
* Color constructor.
*
* @param string $hexString Hex string
* @param float $alpha Transparency value 0-1
*/
public function __construct( $hexString = '', $alpha = 1.0 ){
$this->hexString = $hexString; // TODO: Validate hexstring
$this->alpha = $alpha;
}
/**
* Get RGB array
*
* @return array Contains array($r, $g, $b)
*/
public function getRgb(){
return $this->hexToRgb( $this->hexString );
}
/**
* Get RGBA array
*
* @return array Contains array($r, $g, $b, $a)
*/
public function getRgba(){
$rgba = $this->hexToRgb( $this->hexString );
$rgba[] = $this->alpha;
return $rgba;
}
/**
* Convert hex string to RGB
* @param string $hex Hex string. Possible values: #ffffff, #fff, fff
* @return array Contains (RGB) values red, green and blue
*/
public function hexToRgb( $hex ) {
$hex = ltrim($hex, '#'); // Remove #
if(strlen($hex) == 3) {
$r = hexdec(substr($hex,0,1).substr($hex,0,1));
$g = hexdec(substr($hex,1,1).substr($hex,1,1));
$b = hexdec(substr($hex,2,1).substr($hex,2,1));
} else {
$r = hexdec(substr($hex,0,2));
$g = hexdec(substr($hex,2,2));
$b = hexdec(substr($hex,4,2));
}
return array($r, $g, $b); // Returns an array with the rgb values
}
/**
* Get hex string.
*
* @return string
*/
public function getHexString() {
return $this->hexString;
}
/**
* Set hex string.
*
* @param string $hexString
*/
public function setHexString($hexString) {
$this->hexString = $hexString;
}
/**
* Alpha value.
* @return float
*/
public function getAlpha() {
return $this->alpha;
}
/**
* @param float $alpha
*/
public function setAlpha($alpha) {
$this->alpha = $alpha;
}
}