application/libraries/Image.php

   1 <?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
   2
   3 /**
   4  * An image processing library initially intended for creating thumbnails.
   5  *
   6  * @category    Library
   7  * @author              Simon Jarvis, Călin-Andrei Burloiu
   8  * @copyright   2006 Simon Jarvis, 2011 Călin-Andrei Burloiu
   9  */
  10
  11 define('IMAGETYPE_AUTO', 0);
  12
  13 class Image {
  14
  15         var $image;
  16         var $image_type;
  17
  18         function load($filename) {
  19                 $image_info = getimagesize($filename);
  20                 $this->image_type = $image_info[2];
  21                 if( $this->image_type == IMAGETYPE_JPEG ) {
  22                         $this->image = imagecreatefromjpeg($filename);
  23                 } elseif( $this->image_type == IMAGETYPE_GIF ) {
  24                         $this->image = imagecreatefromgif($filename);
  25                 } elseif( $this->image_type == IMAGETYPE_PNG ) {
  26                         $this->image = imagecreatefrompng($filename);
  27                 }
  28         }
  29         function save($filename, $image_type=IMAGETYPE_JPEG, $compression=60, $permissions=null) {
  30                 if( $image_type == IMAGETYPE_AUTO) {
  31                         if (preg_match('/\.jpg$/', $filename)
  32                                         || preg_match('/\.jpeg$/', $filename))
  33                                 $image_type = IMAGETYPE_JPEG;
  34                         elseif (preg_match('/\.gif$/', $filename))
  35                                 $image_type = IMAGETYPE_GIF;
  36                         elseif (preg_match('/\.png$/', $filename))
  37                                 $image_type = IMAGETYPE_PNG;
  38                 }
  39
  40                 if( $image_type == IMAGETYPE_JPEG ) {
  41                         imagejpeg($this->image,$filename,$compression);
  42                 } elseif( $image_type == IMAGETYPE_GIF ) {
  43                         imagegif($this->image,$filename);
  44                 } elseif( $image_type == IMAGETYPE_PNG ) {
  45                         imagepng($this->image,$filename);
  46                 }
  47
  48                 if( $permissions != null) {
  49                         chmod($filename,$permissions);
  50                 }
  51         }
  52         function output($image_type=IMAGETYPE_JPEG) {
  53                 if( $image_type == IMAGETYPE_JPEG ) {
  54                         imagejpeg($this->image);
  55                 } elseif( $image_type == IMAGETYPE_GIF ) {
  56                         imagegif($this->image);
  57                 } elseif( $image_type == IMAGETYPE_PNG ) {
  58                         imagepng($this->image);
  59                 }
  60         }
  61         function save_thumbnail($filename, $width, $height,
  62                         $image_type=IMAGETYPE_JPEG)
  63         {
  64                 $ratio = $this->get_width() / $this->get_height();
  65                 $thumbRatio = $width / $height;
  66
  67                 if($ratio < $thumbRatio)
  68                         $this->resize_to_height($height);
  69                 else
  70                         $this->resize_to_width($width);
  71
  72                 $this->save($filename, $image_type);
  73         }
  74         function get_width() {
  75                 return imagesx($this->image);
  76         }
  77         function get_height() {
  78                 return imagesy($this->image);
  79         }
  80         function resize_to_height($height) {
  81                 $ratio = $height / $this->get_height();
  82                 $width = $this->get_width() * $ratio;
  83                 $this->resize($width,$height);
  84         }
  85         function resize_to_width($width) {
  86                 $ratio = $width / $this->get_width();
  87                 $height = $this->get_height() * $ratio;
  88                 $this->resize($width,$height);
  89         }
  90         function scale($scale) {
  91                 $width = $this->get_width() * $scale/100;
  92                 $height = $this->get_height() * $scale/100;
  93                 $this->resize($width,$height);
  94         }
  95         function resize($width,$height) {
  96                 $new_image = imagecreatetruecolor($width, $height);
  97                 imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->get_width(), $this->get_height());
  98                 $this->image = $new_image;
  99         }
 100 }
 101
 102
 103 /* End of file Singleton_db.php */
 104 /* Location: ./application/libraries/Singleton_db.php */