<code lang="php">

class jpgimage {

	var $ih;
	var $imagefile;

	function open($filename) {
		$this->ih = imagecreatefromjpeg($filename);

		if ( !$this->ih ) {
			return false;
		} else {
			$imagefile = $filename;
			return true;
		}
	}

	// kicks back image handle for user to mod.. 
	function get_imagehandle() {
		if ( $this->ih ) {
			return $this->ih;
		} else {
			return false;
		}
	}
	
	// returns opened image's width 
	function get_width() {
		return imagesx($this->ih);
	}
	
	// Returns opened image's height
	function get_height() {
		return imagesy($this->ih);
	}

	function resize_aspect($max_size) {

		if ( $this->get_width() > $max_size || $this->get_height() > $max_size ) {

			$new_width = $max_size;
			$new_height = $max_size;

			// wider 
			if ( $this->get_width() > $this->get_height() ) {
				$new_height = ($new_width/$this->get_width()) * $this->get_height();
			// taller
			} else {
				$new_width = ($new_height/$this->get_height()) * $this->get_width();
			}

			$dh = imagecreatetruecolor($new_width,$new_height) or die("Cannot create true color ($new_width,$new_height)");
			imagecopyresampled( $dh, $this->ih, 0,0,0,0,$new_width,$new_height,$this->get_width(),$this->get_height() );

			// clear current image handle
			imagedestroy($this->ih);

			// set new handle to image handle
			$this->ih = $dh;

		}

	}

	function output($quality = 100) {
		header('Content-type: image/jpeg');
		imagejpeg($this->ih,"",$quality);
	}

	function save($quality = 100) {
		imagejpeg($this->ih,$this->imagefile,$quality);
	}

	function clear() {
		imagedestroy($this->ih);
	}

}
</code>