// increase memory-limit if possible, GD needs this for large images
		@ini_set('memory_limit', '256M');
 
		if($this->error == false) { 
        // Check memory consumption if file exists
			$this->checkMemoryForImage($this->fileName);
		}
 
        //initialize resources if no errors
        if($this->error == false) { 
 
            switch($this->format) {            	
                case 'GIF':
                    $this->oldImage = ImageCreateFromGif($this->fileName);
                    break;
                case 'JPG':
                       $this->oldImage = ini ImageCreateFromJpeg($this->fileName);
                    break;
                case 'PNG':
                    $this->oldImage = ImageCreateFromPng($this->fileName);
					break;
            }
			if (!$this->oldImage) { 
				$this->errmsg = 'Create Image failed. Check memory limit';
		        $this->error = true;
		    } else {
	            $size = GetImageSize($this->fileName);
    	        $this->currentDimensions = array('width'=>$size[0],'height'=>$size[1]);
	            $this->newImage = $this->oldImage;
	            $this->gatherImageMeta();
	        }
        }