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Direktori : /home2/selectio/www/ecommerce-website/website/vendor/mpdf/mpdf/src/Gif/ |
Current File : /home2/selectio/www/ecommerce-website/website/vendor/mpdf/mpdf/src/Gif/FileHeader.php |
<?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 FileHeader { var $m_lpVer; var $m_nWidth; var $m_nHeight; var $m_bGlobalClr; var $m_nColorRes; var $m_bSorted; var $m_nTableSize; var $m_nBgColor; var $m_nPixelRatio; /** * @var \Mpdf\Gif\ColorTable */ var $m_colorTable; public function __construct() { unset($this->m_lpVer); unset($this->m_nWidth); unset($this->m_nHeight); unset($this->m_bGlobalClr); unset($this->m_nColorRes); unset($this->m_bSorted); unset($this->m_nTableSize); unset($this->m_nBgColor); unset($this->m_nPixelRatio); unset($this->m_colorTable); } function load($lpData, &$hdrLen) { $hdrLen = 0; $this->m_lpVer = substr($lpData, 0, 6); if (($this->m_lpVer <> "GIF87a") && ($this->m_lpVer <> "GIF89a")) { return false; } $this->m_nWidth = $this->w2i(substr($lpData, 6, 2)); $this->m_nHeight = $this->w2i(substr($lpData, 8, 2)); if (!$this->m_nWidth || !$this->m_nHeight) { return false; } $b = ord(substr($lpData, 10, 1)); $this->m_bGlobalClr = ($b & 0x80) ? true : false; $this->m_nColorRes = ($b & 0x70) >> 4; $this->m_bSorted = ($b & 0x08) ? true : false; $this->m_nTableSize = 2 << ($b & 0x07); $this->m_nBgColor = ord(substr($lpData, 11, 1)); $this->m_nPixelRatio = ord(substr($lpData, 12, 1)); $hdrLen = 13; if ($this->m_bGlobalClr) { $this->m_colorTable = new ColorTable(); if (!$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); } }