note 86198 added to function.imagecolorsforindex

I have optimized the rgb2hsl function from slepichev a bit, so that it is a bit shorter and hopefully a bit faster:

<?php
/**
 * Convert RGB colors array into HSL array
 * 
 * @param array $ RGB colors set, each color component with range 0 to 255
 * @return array HSL set, each color component with range 0 to 1
 */
function rgb2hsl($rgb){
	$clrR = ($rgb[0]);
	$clrG = ($rgb[1]);
	$clrB = ($rgb[2]);
	 
	$clrMin = min($clrR, $clrG, $clrB);
	$clrMax = max($clrR, $clrG, $clrB);
	$deltaMax = $clrMax - $clrMin;
	 
	$L = ($clrMax + $clrMin) / 510;
	 
	if (0 == $deltaMax){
		$H = 0;
		$S = 0;
	}
	else{
		if (0.5 > $L){
			$S = $deltaMax / ($clrMax + $clrMin);
		}
		else{
			$S = $deltaMax / (510 - $clrMax - $clrMin);
		}

		if ($clrMax == $clrR) {
			$H = ($clrG - $clrB) / (6.0 * $deltaMax);
		}
		else if ($clrMax == $clrG) {
			$H = 1/3 + ($clrB - $clrR) / (6.0 * $deltaMax);
		}
		else {
			$H = 2 / 3 + ($clrR - $clrG) / (6.0 * $deltaMax);
		}

		if (0 > $H) $H += 1;
		if (1 < $H) $H -= 1;
	}
	return array($H, $S,$L);
}
?>
----
Server IP: 212.124.37.9
Probable Submitter: 91.115.65.189
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Manual Page -- http://www.php.net/manual/en/function.imagecolorsforindex.php
Edit        -- https://master.php.net/note/edit/86198
Del: integrated  -- https://master.php.net/note/delete/86198/integrated
Del: useless     -- https://master.php.net/note/delete/86198/useless
Del: bad code    -- https://master.php.net/note/delete/86198/bad+code
Del: spam        -- https://master.php.net/note/delete/86198/spam
Del: non-english -- https://master.php.net/note/delete/86198/non-english
Del: in docs     -- https://master.php.net/note/delete/86198/in+docs
Del: other reasons-- https://master.php.net/note/delete/86198
Reject      -- https://master.php.net/note/reject/86198
Search      -- https://master.php.net/manage/user-notes.php