<?

function findSharp($orig, $final) // function from Ryan Rud (http://adryrun.com)
{
	$final	= $final * (750.0 / $orig);
	$a		= 52;
	$b		= -0.27810650887573124;
	$c		= .00047337278106508946;
	
	$result = $a + $b * $final + $c * $final * $final;
	
	return max(round($result), 0);
} 

include(realpath(dirname(__FILE__) . "/../") . "/includes/sm_header.php");

// VARS
//
// final_w
// final_h
// ext
// serverimage
// imgid
// archive

if (($_SESSION['mobile'])&&($mobile_override != 1))
{
	$max_w = 320;
	$max_h = 320;
	
	if (($final_w > $max_w)||($final_h > $max_h))
	{
		$ximgid = "";
		
		// horizontal
	  if ($final_w > $final_h)
	  {
	    $temp = ($final_w / $max_w);
	    $final_w = ($final_w / $temp);
	    $final_h = ($final_h / $temp);
	  }
	  // vertical
	  else
	  {
	    $temp = ($final_h / $max_h);
	    $final_h = ($final_h / $temp);
	    $final_w = ($final_w / $temp);
	  }
	}
}

$relativeimage = $_REQUEST['relativeimage'];

$C_CACHE = $_SERVER['DOCUMENT_ROOT']."/cache/";

if (strtolower($ext) == "peg")
    $ext = "jpg";


// IF XIMGID THEN CACHE
if (($ximgid != "")&&(!$mobile))
{

 // IF CACHE EXISTS
 if (file_exists($C_CACHE.$ximgid.".".$ext))
    $img_cached = true;
 else
    $img_cached = false;
}


// CREATE FULL PATH
if ($archive == 0)
   $serverimage = C_WWW.$relativeimage;
else
   $serverimage = OWS_WWW.$relativeimage;

// JPG
if ((strtolower($ext) == "jpg")||(strtolower($ext) == "peg"))
{

     // GET SERVER IMAGE
     $img = ImageCreateFromJPEG($serverimage);

     // CREATE BLANK CANVAS
     $dst_img = imagecreatetruecolor(($final_w),($final_h));

     // COPY SERVER IMAGE INTO CANVAS
     imagecopyresampled($dst_img, $img, 0, 0, 0, 0, $final_w, $final_h, ImageSX($img), ImageSY($img));

     // SET HEADER FILE TYPE
     $fileHeader = "image/jpeg";

     // IF IMAGE IS ALREADY IN CACHE
     if ($img_cached)
     {
         // RETURN IMAGE FROM CACHE
         Header("Content-Type: ".$fileHeader);
         echo file_get_contents($C_CACHE.$ximgid.".".$ext);
     }

     // IF IMAGE NOT IN CACHE
     else
     {
					// Sharpen the image based on two things:
					//	(1) the difference between the original size and the final size
					//	(2) the final size
					$sharpness	= findSharp(ImageSX($img), $final_w);
					
					$sharpenMatrix	= array(
						array(-1, -2, -1),
						array(-2, $sharpness + 12, -2),
						array(-1, -2, -1)
					);
					$divisor		= $sharpness;
					$offset			= 0;
					imageconvolution($dst_img, $sharpenMatrix, $divisor, $offset);
     	
         // SAVE THE IMAGE TO CACHE
         if ($ximgid != "")
             imagejpeg($dst_img, $C_CACHE.$ximgid.".".$ext, '90');

         // RETURN IMAGE TO BROWSER
         Header("Content-Type: ".$fileHeader);
         imagejpeg($dst_img, NULL, 90);
     }

     // CLEAN UP IMAGE
    imagedestroy($dst_img);

// PNG
}
else if (strtolower($ext) == "png")
{
     // GET SERVER IMAGE
     $img = ImageCreateFromPNG($serverimage);

     // CREATE BLANK CANVAS
     $dst_img = imagecreatetruecolor(($final_w),($final_h));
     
     // HANDLE TRANSPARENCY
     $transparency = imagecolortransparent($img);
     imagealphablending($dst_img, false);
     $color = imagecolorallocatealpha($dst_img, 0, 0, 0, 127);
     imagefill($dst_img, 0, 0, $color);
     imagesavealpha($dst_img, true);     
     

     // COPY SERVER IMAGE INTO CANVAS
     imagecopyresampled($dst_img, $img, 0, 0, 0, 0, $final_w, $final_h, ImageSX($img), ImageSY($img));

     // SET HEADER FILE TYPE
     $fileHeader = "image/png";

     // IF IMAGE IS ALREADY IN CACHE
     if ($img_cached)
     {
         // RETURN IMAGE FROM CACHE
         Header("Content-Type: ".$fileHeader);
         echo file_get_contents($C_CACHE.$ximgid.".".$ext);
     }

     // IF IMAGE NOT IN CACHE
     else
     {
         // SAVE THE IMAGE TO CACHE
         if ($ximgid != "")
             imagepng($dst_img, $C_CACHE.$ximgid.".".$ext);

         // RETURN IMAGE TO BROWSER
         Header("Content-Type: ".$fileHeader);
         imagepng($dst_img);
     }

     // CLEAN UP IMAGE
     imagedestroy($dst_img);
}

// GIF
else if (strtolower($ext) == "gif")
{
     // GET SERVER IMAGE
     $img = ImageCreateFromGIF($serverimage);

     // CREATE BLANK CANVAS
     $dst_img = imagecreatetruecolor(($final_w),($final_h));
     
     // HANDLE TRANSPARENCY   
     $trnprt_indx = imagecolortransparent($img);
		 if ($trnprt_indx >= 0) 
		 {
				//its transparent
			  $trnprt_color = imagecolorsforindex($img, $trnprt_indx);
			  $trnprt_indx = imagecolorallocate($dst_img, $trnprt_color['red'], $trnprt_color['green'], $trnprt_color['blue']);
			  imagefill($dst_img, 0, 0, $trnprt_indx);
			  imagecolortransparent($dst_img, $trnprt_indx);
		 }
		 else 
		 {
			  Imagefill($dst_img, 0, 0, imagecolorallocate($dst_img, 255, 255, 255));
		 }     

     // COPY SERVER IMAGE INTO CANVAS
     imagecopyresampled($dst_img, $img, 0, 0, 0, 0, $final_w, $final_h, ImageSX($img), ImageSY($img));

     // SET HEADER FILE TYPE
     $fileHeader = "image/gif";

     // IF IMAGE IS ALREADY IN CACHE
     if ($img_cached)
     {
         // RETURN IMAGE FROM CACHE
         Header("Content-Type: ".$fileHeader);
         echo file_get_contents($C_CACHE.$ximgid.".".$ext);
     }

     // IF IMAGE NOT IN CACHE
     else
     {
         // SAVE THE IMAGE TO CACHE
         if ($ximgid != "")
             imagegif($dst_img, $C_CACHE.$ximgid.".".$ext);

         // RETURN IMAGE TO BROWSER
         Header("Content-Type: ".$fileHeader);
         imagegif($dst_img);
     }

     // CLEAN UP IMAGE
    imagedestroy($dst_img);
}



?>