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<?php
/*
* File: SimpleImage.php
* Author: Simon Jarvis
* Copyright: 2006 Simon Jarvis
* Date: 08/11/06
* Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details:
* http://www.gnu.org/licenses/gpl.html
*
*/

class SimpleImage {

   var $image;
   var $image_type;

   function load($filename) {
   $image_info = getimagesize($filename);
   $this->image_type = $image_info[2];
   if( $this->image_type == IMAGETYPE_JPEG ) {
   $this->image = imagecreatefromjpeg($filename);
   } elseif( $this->image_type == IMAGETYPE_GIF ) {
   $this->image = imagecreatefromgif($filename);
   } elseif( $this->image_type == IMAGETYPE_PNG ) {
   $this->image = imagecreatefrompng($filename);
   }
   }
   function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) {
   if( $image_type == IMAGETYPE_JPEG ) {
   imagejpeg($this->image,$filename,$compression);
   } elseif( $image_type == IMAGETYPE_GIF ) {
   imagegif($this->image,$filename);
   } elseif( $image_type == IMAGETYPE_PNG ) {
   imagepng($this->image,$filename);
   }
   if( $permissions != null) {
   chmod($filename,$permissions);
   }
   }
   function output($image_type=IMAGETYPE_JPEG) {
   if( $image_type == IMAGETYPE_JPEG ) {
   imagejpeg($this->image);
   } elseif( $image_type == IMAGETYPE_GIF ) {
   imagegif($this->image);
   } elseif( $image_type == IMAGETYPE_PNG ) {
   imagepng($this->image);
   }
   }
   function getWidth() {
   return imagesx($this->image);
   }
   function getHeight() {
   return imagesy($this->image);
   }
   function resizeToHeight($height) {
   $ratio = $height / $this->getHeight();
   $width = $this->getWidth() * $ratio;
   $this->resize($width,$height);
   }
   function resizeToWidth($width) {
   $ratio = $width / $this->getWidth();
   $height = $this->getheight() * $ratio;
   $this->resize($width,$height);
   }
   function scale($scale) {
   $width = $this->getWidth() * $scale/100;
   $height = $this->getheight() * $scale/100;
   $this->resize($width,$height);
   }
   function resize($width,$height) {
   $new_image = imagecreatetruecolor($width, $height);
   imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
   $this->image = $new_image;
   }
}
?>

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