<?php
/*
 *
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 */


/**
 * ColorUtilクラス
 *
 * @package UTGD4
 * @access   public
 **/
class ColorUtil {

	protected static $_colornames = array(
		'aliceblue'				=>	array(240,248,255),
		'antiquewhite'			=>	array(250,235,215),
		'aqua'						=>	array(0,255,255),
		'aquamarine'				=>	array(127,255,212),
		'azure'					=>	array(240,255,255),
		'beige'					=>	array(245,245,220),
		'bisque'					=>	array(255,228,196),
		'black'					=>	array(0,0,0),
		'blanchedalmond'			=>	array(255,235,205),
		'blue'						=>	array(0,0,255),
		'blueviolet'				=>	array(138,43,226),
		'brown'					=>	array(165,42,42),
		'burlywood'				=>	array(222,184,135),
		'cadetblue'				=>	array(95,158,160),
		'chartreuse'				=>	array(127,255,0),
		'chocolate'				=>	array(210,105,30),
		'coral'					=>	array(255,127,80),
		'cornflowerblue'			=>	array(100,149,237),
		'cornsilk'					=>	array(255,248,220),
		'crimson'					=>	array(220,20,60),
		'cyan'						=>	array(0,255,255),
		'darkblue'					=>	array(0,0,13),
		'darkcyan'					=>	array(0,139,139),
		'darkgoldenrod'			=>	array(184,134,11),
		'darkgray'					=>	array(169,169,169),
		'darkgreen'				=>	array(0,100,0),
		'darkkhaki'				=>	array(189,183,107),
		'darkmagenta'				=>	array(139,0,139),
		'darkolivegreen'			=>	array(85,107,47),
		'darkorange'				=>	array(255,140,0),
		'darkorchid'				=>	array(153,50,204),
		'darkred'					=>	array(139,0,0),
		'darksalmon'				=>	array(233,150,122),
		'darkseagreen'			=>	array(143,188,143),
		'darkslateblue'			=>	array(72,61,139),
		'darkslategray'			=>	array(47,79,79),
		'darkturquoise'			=>	array(0,206,209),
		'darkviolet'				=>	array(148,0,211),
		'deeppink'					=>	array(255,20,147),
		'deepskyblue'				=>	array(0,191,255),
		'dimgray'					=>	array(105,105,105),
		'dodgerblue'				=>	array(30,144,255),
		'firebrick'				=>	array(178,34,34),
		'floralwhite'				=>	array(255,250,240),
		'forestgreen'				=>	array(34,139,34),
		'fuchsia'					=>	array(255,0,255),
		'gainsboro'				=>	array(220,220,220),
		'ghostwhite'				=>	array(248,248,255),
		'gold'						=>	array(255,215,0),
		'goldenrod'				=>	array(218,165,32),
		'gray'						=>	array(128,128,128),
		'green'					=>	array(0,128,0),
		'greenyellow'				=>	array(173,255,47),
		'honeydew'					=>	array(240,255,240),
		'hotpink'					=>	array(255,105,180),
		'indianred'				=>	array(205,92,92),
		'indigo'					=>	array(75,0,130),
		'ivory'					=>	array(255,255,240),
		'khaki'					=>	array(240,230,140),
		'lavender'					=>	array(230,230,250),
		'lavenderblush'			=>	array(255,240,245),
		'lawngreen'				=>	array(124,252,0),
		'lemonchiffon'			=>	array(255,250,205),
		'lightblue'				=>	array(173,216,230),
		'lightcoral'				=>	array(240,128,128),
		'lightcyan'				=>	array(224,255,255),
		'lightgoldenrodyellow'	=>	array(250,250,210),
		'lightgreen'				=>	array(144,238,144),
		'lightgrey'				=>	array(211,211,211),
		'lightpink'				=>	array(255,182,193),
		'lightsalmon'				=>	array(255,160,122),
		'lightseagreen'			=>	array(32,178,170),
		'lightskyblue'			=>	array(135,206,250),
		'lightslategray'			=>	array(119,136,153),
		'lightsteelblue'			=>	array(176,196,222),
		'lightyellow'				=>	array(255,255,224),
		'lime'						=>	array(0,255,0),
		'limegreen'				=>	array(50,205,50),
		'linen'					=>	array(250,240,230),
		'magenta'					=>	array(255,0,255),
		'maroon'					=>	array(128,0,0),
		'mediumaquamarine'		=>	array(102,205,170),
		'mediumblue'				=>	array(0,0,205),
		'mediumorchid'			=>	array(186,85,211),
		'mediumpurple'			=>	array(147,112,219),
		'mediumseagreen'			=>	array(60,179,113),
		'mediumslateblue'			=>	array(123,104,238),
		'mediumspringgreen'		=>	array(0,250,154),
		'mediumturquoise'			=>	array(72,209,204),
		'mediumvioletred'			=>	array(199,21,133),
		'midnightblue'			=>	array(25,25,112),
		'mintcream'				=>	array(245,255,250),
		'mistyrose'				=>	array(255,228,225),
		'moccasin'					=>	array(255,228,181),
		'navajowhite'				=>	array(255,222,173),
		'navy'						=>	array(0,0,128),
		'oldlace'					=>	array(253,245,230),
		'olive'					=>	array(128,128,0),
		'olivedrab'				=>	array(107,142,35),
		'orange'					=>	array(255,165,0),
		'orangered'				=>	array(255,69,0),
		'orchid'					=>	array(218,112,214),
		'palegoldenrod'			=>	array(238,232,170),
		'palegreen'				=>	array(152,251,152),
		'paleturquoise'			=>	array(175,238,238),
		'palevioletred'			=>	array(219,112,147),
		'papayawhip'				=>	array(255,239,213),
		'peachpuff'				=>	array(255,218,185),
		'peru'						=>	array(205,133,63),
		'pink'						=>	array(255,192,203),
		'plum'						=>	array(221,160,221),
		'powderblue'				=>	array(176,224,230),
		'purple'					=>	array(128,0,128),
		'red'						=>	array(255,0,0),
		'rosybrown'				=>	array(188,143,143),
		'royalblue'				=>	array(65,105,225),
		'saddlebrown'				=>	array(139,69,19),
		'salmon'					=>	array(250,128,114),
		'sandybrown'				=>	array(244,164,96),
		'seagreen'					=>	array(46,139,87),
		'seashell'					=>	array(255,245,238),
		'sienna'					=>	array(160,82,45),
		'silver'					=>	array(192,192,192),
		'skyblue'					=>	array(135,206,235),
		'slateblue'				=>	array(106,90,205),
		'slategray'				=>	array(112,128,144),
		'snow'						=>	array(255,250,250),
		'springgreen'				=>	array(0,255,127),
		'steelblue'				=>	array(70,130,180),
		'tan'						=>	array(210,180,140),
		'teal'						=>	array(0,128,128),
		'thistle'					=>	array(216,191,216),
		'tomato'					=>	array(255,99,71),
		'turquoise'				=>	array(64,224,208),
		'violet'					=>	array(238,130,238),
		'wheat'					=>	array(245,222,179),
		'white'					=>	array(255,255,255),
		'whitesmoke'				=>	array(245,245,245),
		'yellow'					=>	array(255,255,0),
		'yellowgreen'				=>	array(154,205,50)
	);

	/**
	 * 色文字列をチェックする
	 * @access     public
	 * @param     string    $string      色文字列
	 * @return    boolean   
	 */
    static public function checkColorString($string){
    	if(array_key_exists($string,self::$_colornames)){
    		//name vertion like 'black'
    		return TRUE;
    	}elseif(eregi("^#([A-F]|[0-9]){6}",$string,$pat)){
    		//long vertion like #AABBCC 
    		return TRUE;
    	}elseif(eregi("^#([A-F]|[0-9]){3}",$string,$pat)){
    		//short vertion like #ABC (=#AABBCC)
    		return TRUE;
    	}else{
    		return FALSE;
    	}
    }
    
    /**
	 * 色文字列からRGBを取得する
	 * @access     public
	 * @param     string    $string      色文字列
	 * @return    array     $red,$green,$blue
	 */
    static public function getRGB($string){
    	if(self::checkColorString($string)){
    	}else{
    		$string = 'white';
    	}
    	if(array_key_exists($string,self::$_colornames)){
    		//name vertion like 'black'
    		$array = self::$_colornames[$string];
    	}else{
    		//hex version like #AABBCC or #ABC
    		$array = self::getRGBfromHex($string);
    	}
    	return $array;
    }
    
    /**
	 * RGB配列を色文字列に変換する
	 * @access     public
	 * @param     int       $red       色文字列
	 * @param     int       $green     色文字列
	 * @param     int       $blue      色文字列
	 * @return    string    
	 */
	static public function getHexfromRGB($red,$green,$blue){
		$hex = '#';
		if($red < 0){
			$red = 0;
		}elseif($red > 255){
			$red = 255;
		}
		if($green < 0){
			$green = 0;
		}elseif($green > 255){
			$green = 255;
		}
		if($blue < 0){
    		$blue = 0;
    	}elseif($blue > 255){
    		$blue = 255;
    	}
    	$hex .= dechex($red);
    	$hex .= dechex($green);
    	$hex .= dechex($blue);
		
		return $hex;
	}

    /**
	 * HEXをRGB配列に変換する
	 * @access     public
	 * @param     string    $str     HEX色文字列
	 * @return    array    
	 */
	static public function getRGBfromHex($str){
		$color = str_replace('#', '', $str);
		if(strlen($color) == 3){
			// short #abc form
			return array(hexdec($color{0}.$color{0}),hexdec($color{1}.$color{1}),hexdec($color{2}.$color{2}));
		}else{
			// long #aabbcc form
			return array(hexdec(substr($color, 0, 2)),hexdec(substr($color, 2, 2)),hexdec(substr($color, 4, 2)));
		}
	}
	
	/**
	 * 補色を取る
	 * @access     public
	 * @param     string  $color      色文字列
	 * @return    string    補色色文字列
	 */
	public static function getComplementaryColor($color){
		list($r,$g,$b) = self::getRGB($color);
		$cr = 255 - $r;
		$cg = 255 - $g;
		$cb = 255 - $b;

		return ColorUtil::getHexfromRGB($cr,$cg,$cb);
	}
	
}

?>