CodeIgniter image processing class code

define("BASEPATH", dirname(__FILE__).'/');

function &get_instance(&$class_object)
{
    return $class_object;
}

function log_message(){}
// 图像处理类位置 CodeIgniter: ./system/libraries/Image_lib.php
include("Image_lib.php");

$config['image_library'] = 'gd2';
$config['source_image'] = "/home/qiufeng/work/test/bdlogo.gif";
$config['create_thumb'] = TRUE;
$config['dynamic_output'] = TRUE;
$config['maintain_ratio'] = TRUE;
$config['width'] = 500;
$config['height'] = 500;

$image = new CI_Image_lib($config);
$image->resize();