<?php
/**
* gif_info.php
* gif-info class for transparency stuff
*
* @author  Tim Kroeger (original author)
* @copyright Copyright 2005-2006
* @license http://www.gnu.org/licenses/gpl.txt GNU General Public License V2.0
* @version $Id: ibmz_gif_info.class.php,v 2.0 Rev 8 2010-05-31 23:46:5 DerManoMann Exp $
* Last modified by DerManoMann 2010-05-31 23:46:50 
*/
class gifinfo
{
var $m_transparentRed;
var $m_transparentGreen;
var $m_transparentBlue;
var $m_signature;
var $m_version;
var $m_width;
var $m_height;
var $m_colorFlag;
var $m_backgroundIndex;
function gifinfo($filename)
{
$fp                        = fopen($filename,"rb");
$result                    = fread($fp,13);
$this->m_signature    = substr($result,0,3);
$this->m_version        = substr($result,3,3);
$this->m_width        = ord(substr($result,6,1)) + ord(substr($result,7,1)) * 256;
$this->m_height        = ord(substr($result,8,1)) + ord(substr($result,9,1)) * 256;
$this->m_colorFlag    = ord(substr($result,10,1)) >> 7;
$this->m_background    = ord(substr($result,11));
if($this->m_colorFlag)
{
$tableSizeNeeded = ($this->m_background + 1) * 3;
$result = fread($fp,$tableSizeNeeded);
$this->m_transparentRed    = ord(substr($result,$this->m_background * 3,1));
$this->m_transparentGreen    = ord(substr($result,$this->m_background * 3 + 1,1));       
$this->m_transparentBlue    = ord(substr($result,$this->m_background * 3 + 2,1));           
}
fclose($fp);
}
}