JPG conversion problem

[raffael3d]

I get weird results after converting data from Flash to a JPG using PHP

the way it should look like is on the right (black and white) and the way it looks is on the left, totally screwed up, why is that???

here is my code to convert the data:

$data = explode(",", $_POST['img']);
	$width = $_POST['width'];
	$height = $_POST['height'];
	//Allocate image
	$image=(function_exists("imagecreatetruecolor"))?imagecreatetruecolor( $width ,$height ):imagecreate( $width ,$height );
	imagefill($image, 0, 0, 0xFFFFFF);
	//Copy pixels
	$i = 0;
	for($x=0; $x<=$width; $x++){
		for($y=0; $y<=$height; $y++){
			while(strlen($data[$i]) < 6) $data[$i] = "0" . $data[$i];
			$r = 255-hexdec("0X".substr( $data[$i] , 0 , 2 )); 
			$g = 255-hexdec("0x".substr( $data[$i] , 2 , 2 )); 
			$b = 255-hexdec("0x".substr( $data[$i++] , 4 , 2 ));
			$color =  ($r << 16) | ($g << 8) | $b; 
			$color = imagecolorallocate($image, $r, $g, $b);
			imagesetpixel ( $image , $x , $y , $color );
		}
	}

[raffael3d]

it seems that only the black color is the problem. so if you have an image that has a lot of black you get bad results, why is that??

see an example:
on the right side it is the way it should be, on the left it's screwed up.
www.raffael3d.com/konvert.jpg

any ideas?

[sys4dm1n]

Well it looks like a color or layer problem.

What is the quality of the JPG suppose to be and the Flash aswel?