<?
 function resize($img, $w, $h, $newfilename) {
 
 //Check if GD extension is loaded
 if (!extension_loaded('gd') && !extension_loaded('gd2')) {
  trigger_error("GD is not loaded", E_USER_WARNING);
  return false;
 }
 
 //Get Image size info
 $imgInfo = getimagesize($img);
 switch ($imgInfo[2]) {
  case 1: $im = imagecreatefromgif($img); break;
  case 2: $im = imagecreatefromjpeg($img);  break;
  case 3: $im = imagecreatefrompng($img); break;
  default:  trigger_error('Unsupported filetype!', E_USER_WARNING);  break;
 }
 
 //If image dimension is smaller, do not resize
 if ($imgInfo[0] <= $w && $imgInfo[1] <= $h) {
  $nHeight = $imgInfo[1];
  $nWidth = $imgInfo[0];
 }else{
  //yeah, resize it, but keep it proportional
  if ($w/$imgInfo[0] < $h/$imgInfo[1]) {
   $nWidth = $w;
   $nHeight = $imgInfo[1]*($w/$imgInfo[0]);
  }else{
   $nWidth = $imgInfo[0]*($h/$imgInfo[1]);
   $nHeight = $h;
  }
 }
 
 $nWidth = round($nWidth);
 $nHeight = round($nHeight);
 
 $newImg = imagecreatetruecolor($nWidth, $nHeight);
 
 /* Check if this image is PNG or GIF, then set if Transparent*/  
 if(($imgInfo[2] == 1) OR ($imgInfo[2]==3)){
  imagealphablending($newImg, false);
  imagesavealpha($newImg,true);
  $transparent = imagecolorallocatealpha($newImg, 255, 255, 255, 127);
  imagefilledrectangle($newImg, 0, 0, $nWidth, $nHeight, $transparent);
 }
 imagecopyresampled($newImg, $im, 0, 0, 0, 0, $nWidth, $nHeight, $imgInfo[0], $imgInfo[1]);
 
 //Generate the file, and rename it to $newfilename
 switch ($imgInfo[2]) {
  case 1: imagegif($newImg,$newfilename); break;
  case 2: imagejpeg($newImg,$newfilename,100);  break;
  case 3: imagepng($newImg,$newfilename); break;
  default:  trigger_error('Failed resize image!', E_USER_WARNING);  break;
 }
   
   return $newfilename;
}


function create_resized_images($basepath, $originals, $filename, &$resamples)
{
	 //Check if GD extension is loaded
	 if (!extension_loaded('gd') && !extension_loaded('gd2')) {
	  trigger_error("GD is not loaded", E_USER_WARNING);
	  return false;
	 }


	// fisical filename
	$imagefilename = $basepath.$originals.$filename;
	
	// ret cond : 
	list($w,$h,$type) = getimagesize($imagefilename);
	if ($w == 0 || $h == 0)
		return false;

	$image;
	switch($type){
		case 1: $image = imagecreatefromgif($imagefilename); break;
		case 2: $image = imagecreatefromjpeg($imagefilename); break;
		case 3: $image = imagecreatefrompng($imagefilename); break;
		default: return false; break;
	};
	
	foreach($resamples as $k => $v){
		$small_side = min($w,$h);
		$big_side = max($w,$h);
		$mw = $v["maxwidth"];
		$mh = $v["maxheight"];

		$transform = $v["transform"]; 
		
		if(!is_int($mw) || $mw <= 0 || !is_int($mh) || $mh <= 0)
			$resamples[$k]["return"] = false;
		$ch = 0;
		$cw = 0;
		
		$th = round($mw*$h/$w);
		$tw = round($mh*$w/$h);
		//$resamples[$k]["debug"] .= "{ w : $w } { h : $h }{ mw : $mw } { mh : $mh } ";
		switch($transform){
			case 'crop':{
				//$resamples[$k]["debug"] .= "{ tw : $tw } { th : $th }";
				if($th>=$mh){
					$nh = ceil($th);
					$nw = $mw;
					$rh = $mh*$w/$mw;
					$ch = round(($h-$rh)/2);
					$cw = 0;
					//$resamples[$k]["debug"] .= " [h>=th] { nw : $nw } { nh : $nh }  { ch : $ch } { cw : $cw }";
				}elseif($tw>=$mw){
					$nw = ceil($tw);
					$nh = $mh;
					$rw = $mw*$h/$mh;
					$cw = round(($w-$rw)/2);
					$ch = 0;
					//$resamples[$k]["debug"] .= " [w>=tw] { nw : $nw } { nh : $nh } { ch : $ch } { cw : $cw }";
				}
			}break;
			case 'scale':{
					$nh=$mh;
					$nw=$mw;
			}break;
			case 'max':{
				if($th<=$mh){ // if($th<=$hm){ //
					$nh=$th; // $nh=$th;
					$nw=$mw; // $nw=$mw;
					$mh=$nh;
				}else{
					$nw=$tw;
					$nh=$mh;
					$mw=$nw;
				}
			}break;
			default:break;
		}
		
		$newimage = imagecreatetruecolor($mw,$mh);
 		if($type == 1 OR $type == 3){
			imagealphablending($newimage, false);
			imagesavealpha($newimage, true);
  			$transparent = imagecolorallocatealpha($newimage, 255, 255, 255, 127);
  			imagefilledrectangle($newimage, 0, 0, $mw,$mh, $transparent);
 		}
 			
		imagecopyresampled($newimage,$image,0,0,$cw,$ch,$nw,$nh,$w,$h);

		$newpath = $basepath.$k.$filename;
		switch($type){
			case 1: imagegif($newimage,$newpath); break;
			case 2: imagejpeg($newimage,$newpath,90); break;
			case 3: imagepng($newimage,$newpath); break;
			default: return false; break;
		};
		
		chmod($newpath,0777);
		imagedestroy($newimage);
		$resamples[$k]["return"] = true;
	}
	return true;
}


?>