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HUE shift

HUE shift

<?

function make_seed() {
    list($usec, $sec) = explode(' ', microtime());
    return (float) $sec + ((float) $usec * 100000);
}

$ar=array(0,0,0,0);
srand(make_seed());
$onetwoorthree=rand(0,2);
$first=rand(0,100)/100;
$second=1-$first;

$ar[$onetwoorthree]=$first;
$ar[$onetwoorthree+1]=$second;
if ($onetwoorthree+1>2)
	$ar[0]=$second;
//echo " ".$ar[0]." ".$ar[1]." ".$ar[2];

$im = imagecreatefrompng("b2.png") or die ("Cannot Initialize new GD image stream");

header ("Content-type: image/jpeg");
error_reporting(0);
$height=imagesy($im);
$width=imagesx($im);
$im2=imagecreatetruecolor($width,$height);
for ($x=0;$x<$width;$x++){
	for ($y=0;$y<$height;$y++){
		$rgb = ImageColorAt($im, $x, $y);
		$r = ($rgb >> 16) & 0xFF;
		$g = ($rgb >> 8) & 0xFF;
		$b = $rgb & 0xFF;

		$r2=$r;
		$g2=$g;
		$b2=$b;

		$r=$r2*$ar[0]+$g2*$ar[1]+$b2*$ar[2];
		$g=$r2*$ar[2]+$g2*$ar[0]+$b2*$ar[1];
		$b=$r2*$ar[1]+$g2*$ar[2]+$b2*$ar[0];

		$color = imagecolorallocate($im2, $r, $g, $b);

		imagesetpixel($im2,$x,$y,$color);
	}
}
imagejpeg($im2,"",80);
?>
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