<?php
defined('BASEPATH') OR exit('No direct script access allowed');
 
class Index extends MY_Controller {
 function __construct(){
  parent::__construct();
  $this->load->helper(array('form', 'url'));
 }
 
 /**
  * 首页
  */
 public function index() {
  $this->load->view('upload_form', array('error' => ' ' ));
 }
  
  
 public function do_upload()
 {
  $config['upload_path']  = './data/uploads/';
  $config['allowed_types'] = 'gif|jpg|png';
  $config['max_size']  = 100;
  $config['max_width']  = 1024;
  $config['max_height']  = 768;
 
  $this->load->library('upload', $config);
 
  if ( ! $this->upload->do_upload('userfile'))
  {
   $error = array('error' => $this->upload->display_errors());
 
   $this->load->view('upload_form', $error);
  }
  else
  {
   $data = array('upload_data' => $this->upload->data());
    
   $this->load->library('image_lib');   
   list($width, $height) = getimagesize($data['upload_data']['full_path']);
   $config['image_library'] = 'gd2';
   $config['source_image'] = $data['upload_data']['full_path'];
   $config['maintain_ratio'] = TRUE;
   if($width >= $height)
   {
    $config['master_dim'] = 'height';
   }else{
    $config['master_dim'] = 'width';
   }
   $config['width'] = 180;
   $config['height'] = 180;
   $this->image_lib->initialize($config);
   $this->image_lib->resize();
   
   $config['maintain_ratio'] = FALSE;
   if($width >= $height)
   {
    $config['x_axis'] = floor(($width * 180 / $height - 180)/2);
   }else{
    $config['y_axis'] = floor(($height * 180 / $width - 180)/2);
   }
   $this->image_lib->initialize($config);
   $this->image_lib->crop();
    
   $this->load->view('upload_success', $data);
  }
 }
}