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 class Image {
  12
  13         var $image;
  14         var $image_type;
  15
  16         function load($filename) {
  17                 $image_info = getimagesize($filename);
  18                 $this->image_type = $image_info[2];
  19                 if( $this->image_type == IMAGETYPE_JPEG ) {
  20                         $this->image = imagecreatefromjpeg($filename);
  21                 } elseif( $this->image_type == IMAGETYPE_GIF ) {
  22                         $this->image = imagecreatefromgif($filename);
  23                 } elseif( $this->image_type == IMAGETYPE_PNG ) {
  24                         $this->image = imagecreatefrompng($filename);
  25                 }
  26         }
  27         function save($filename, $image_type=IMAGETYPE_JPEG, $compression=60, $permissions=null) {
  28                 if( $image_type == IMAGETYPE_JPEG ) {
  29                         imagejpeg($this->image,$filename,$compression);
  30                 } elseif( $image_type == IMAGETYPE_GIF ) {
  31                         imagegif($this->image,$filename);
  32                 } elseif( $image_type == IMAGETYPE_PNG ) {
  33                         imagepng($this->image,$filename);
  34                 }
  35                 if( $permissions != null) {
  36                         chmod($filename,$permissions);
  37                 }
  38         }
  39         function output($image_type=IMAGETYPE_JPEG) {
  40                 if( $image_type == IMAGETYPE_JPEG ) {
  41                         imagejpeg($this->image);
  42                 } elseif( $image_type == IMAGETYPE_GIF ) {
  43                         imagegif($this->image);
  44                 } elseif( $image_type == IMAGETYPE_PNG ) {
  45                         imagepng($this->image);
  46                 }
  47         }
  48         function saveThumbnail($filename, $width, $height)
  49         {
  50                 $ratio = $this->getWidth() / $this->getHeight();
  51                 $thumbRatio = $width / $height;
  52
  53                 if($ratio < $thumbRatio)
  54                 $this->resizeToHeight($height);
  55                 else
  56                 $this->resizeToWidth($width);
  57
  58                 $this->save($filename);
  59         }
  60         function getWidth() {
  61                 return imagesx($this->image);
  62         }
  63         function getHeight() {
  64                 return imagesy($this->image);
  65         }
  66         function resizeToHeight($height) {
  67                 $ratio = $height / $this->getHeight();
  68                 $width = $this->getWidth() * $ratio;
  69                 $this->resize($width,$height);
  70         }
  71         function resizeToWidth($width) {
  72                 $ratio = $width / $this->getWidth();
  73                 $height = $this->getheight() * $ratio;
  74                 $this->resize($width,$height);
  75         }
  76         function scale($scale) {
  77                 $width = $this->getWidth() * $scale/100;
  78                 $height = $this->getheight() * $scale/100;
  79                 $this->resize($width,$height);
  80         }
  81         function resize($width,$height) {
  82                 $new_image = imagecreatetruecolor($width, $height);
  83                 imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
  84                 $this->image = $new_image;
  85         }
  86 }
  87
  88
  89 /* End of file Singleton_db.php */
  90 /* Location: ./application/libraries/Singleton_db.php */