<?  
/*  
http://www.phpscriptexpert.com/script.php?pn=Image%20Resize%20and%20Watermark&pid=198  
*/  

$image = "../resources/fullsize/".$_GET['image']; 
$watermark = "../resources/watermark.png";

header("Content-type: image/jpeg");  

$im = imagecreatefromjpeg($image);

$maxSizex = 640;
$maxSizey = 440;

/* calculate the new size */
if(imagesy($im)>=$maxSizey || imagesx($im)>=$maxSizex){  
	if(imagesy($im)>=imagesx($im)){  
		$y = $maxSizey;  
		$x = ($y*imagesx($im))/imagesy($im);  
	}
	else
	{  
		$x = $maxSizex;  
		$y = ($x*imagesy($im))/imagesx($im);  
	}  
}
else
{  
	$x = imagesx($im);  
	$y = imagesy($im);  
}  
$yyy=0;  
$xxx=0;  


/* get the watermark image */
$finalWaterMarkImage = imagecreatefrompng($watermark);
$finalWaterMarkWidth = imagesx($finalWaterMarkImage);
$finalWaterMarkHeight = imagesy($finalWaterMarkImage);

/* calculate the centre co-ordinates */
$placementWidth = ($x-$finalWaterMarkWidth)/2;
$placementHeight = ($y);

/* create a new image with extra height for watermark and copy image into it */
$imw = imagecreatetruecolor($x,$y+$finalWaterMarkHeight);  
$trans_colour = imagecolorallocatealpha($imw, 255,255,255,0);
    imagefill($imw, 0, 0, $trans_colour);
    
imagecopyresampled($imw, $im, $xxx,$yyy,0,0,$x,$y,imagesx($im), imagesy($im));  

/* and copy the watermark on */
imagecopy($imw,
		  $finalWaterMarkImage,
		  $placementWidth,
		  $placementHeight,
		  0,
		  0,
		  $finalWaterMarkWidth,
		  $finalWaterMarkHeight
);

/* and return the final jpeg */
imagejpeg($imw); 

imagedestroy($im);
imagedestroy($imw);
imagedestroy($finalWaterMarkImage);


?>