Viewing file:  ImageHeader.php (1.71 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
namespace Mpdf\Gif;
/**
* GIF Util - (C) 2003 Yamasoft (S/C)
*
* All Rights Reserved
*
* This file can be freely copied, distributed, modified, updated by anyone under the only
* condition to leave the original address (Yamasoft, http://www.yamasoft.com) and this header.
*
* @link http://www.yamasoft.com
*/
class ImageHeader
{
var $m_nLeft;
var $m_nTop;
var $m_nWidth;
var $m_nHeight;
var $m_bLocalClr;
var $m_bInterlace;
var $m_bSorted;
var $m_nTableSize;
/**
* @var \Mpdf\Gif\ColorTable
*/
var $m_colorTable;
public function __construct()
{
unset($this->m_nLeft);
unset($this->m_nTop);
unset($this->m_nWidth);
unset($this->m_nHeight);
unset($this->m_bLocalClr);
unset($this->m_bInterlace);
unset($this->m_bSorted);
unset($this->m_nTableSize);
unset($this->m_colorTable);
}
function load($lpData, &$hdrLen)
{
$hdrLen = 0;
$this->m_nLeft = $this->w2i(substr($lpData, 0, 2));
$this->m_nTop = $this->w2i(substr($lpData, 2, 2));
$this->m_nWidth = $this->w2i(substr($lpData, 4, 2));
$this->m_nHeight = $this->w2i(substr($lpData, 6, 2));
if (!$this->m_nWidth || !$this->m_nHeight) {
return false;
}
$b = ord($lpData[8]);
$this->m_bLocalClr = ($b & 0x80) ? true : false;
$this->m_bInterlace = ($b & 0x40) ? true : false;
$this->m_bSorted = ($b & 0x20) ? true : false;
$this->m_nTableSize = 2 << ($b & 0x07);
$hdrLen = 9;
if ($this->m_bLocalClr) {
$this->m_colorTable = new ColorTable();
if (!$this->m_colorTable->load(substr($lpData, $hdrLen), $this->m_nTableSize)) {
return false;
}
$hdrLen += 3 * $this->m_nTableSize;
}
return true;
}
function w2i($str)
{
return ord(substr($str, 0, 1)) + (ord(substr($str, 1, 1)) << 8);
}
}
|