<?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;
	}

}
?>