<?php
/*
	@File:			thumbnail.class.php
	@Author:		Dan Jeffers
	@Date:			11.05.2007
	@Note:			A thumbnail creation class created for Beat the Experts
	@Dependancies:	GD2 Library
	
	
*/

class ImageResize {
	

	function __construct() {

	
	}

	public function loadImage($file, $newFile, $width, $height) {

		$originalWidth	= '';
		$originalHeight	= '';
		$originalRatio	= '';
		$newWidth		= '';
		$newHeight		= '';
		$fileExtension	= '';
		$tempImage		= '';
		$newImage		= '';
		$newFileName	= '';
		$size			= '';
		
		$size = getimagesize($file);
		
		if($size[0] < $width || $size[1] < $height)
		{
			
			return false;
		
		} 
		
		
		
		list($originalWidth, $originalHeight) = $size;
		
		$originalRatio = $originalWidth / $originalHeight;
		
		if($width / $height > $originalRatio)
		{
			
			$newWidth = $height * $originalRatio;
		
		} else {
		
			$newHeight = $width / $originalRatio;
		
		}
		
		$fileExtension = pathinfo($file);
		
		$newImage = imagecreatetruecolor($width, $height);
		
		$newFileName = basename($newFile, $fileExtension['extension'])  . strtolower($fileExtension['extension']);
		
		switch($fileExtension['extension']) {
		
			case 'jpg': case 'jpeg':
				return $this->resizeJpeg($file, $newFileName, $newImage, $tempImage, $width, $height, $originalWidth, $originalHeight);
				break;
			
			case 'gif':
				return $this->resizeGif($file, $newFileName, $newImage, $tempImage, $width, $height, $originalWidth, $originalHeight);
			break;
			
			case 'png':
				return $this->resizePng($file, $newFileName, 9, $newImage, $width, $height, $originalWidth, $originalHeight);
			break;
			
			default:
				
				return false;
			break;
				
		}
	}

	
	protected function resizeJpeg($file, $newFileName, $newImage, $width, $height, $originalWidth, $originalHeight) {
	
		$tempImage = imagecreatefromjpeg($file);

		imagecopyresampled($newImage, $tempImage, 0, 0, 0, 0, $width, $height, $originalWidth, $originalHeight);

		if(!imagejpeg($newImage, $newFileName, 100))
		{

			return false;
			
		} else { 

			return true;
			
		}
	
	
	}
	
	protected function resizeGif($file, $newFileName, $newImage, $width, $height, $originalWidth, $originalHeight) {
	
		$tempImage = imagecreatefromgif($file);
		
		imagecopyresampled($newImage, $tempImage, 0, 0, 0, 0, $width, $height, $originalWidth, $originalHeight);
		
		if(!imagegif($newImage, $newFileName))
		{
		
			return false;
		
		} else { 
		
			return true;
			
		}		
	
	}
	
	protected function resizePng($file, $newFileName, $quality, $newImage, $width, $height, $originalWidth, $originalHeight) {
	
		$tempImage = imagecreatefrompng($file);

		imagecopyresampled($newImage, $tempImage, 0, 0, 0, 0, $width, $height, $originalWidth, $originalHeight);			

		
		if(!imagepng($newImage, $newFileName, $quality))
		{
			
			return false;
			
		} else { 
		
			return true;
			
		}	
	
	}
	
}
?>