/common/libraries/plugin/html2pdf/_tcpdf/tcpdf.php

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<?php

//============================================================+
// File name   : tcpdf.php
// Begin       : 2002-08-03
// Last Update : 2010-03-13
// Author      : Nicola Asuni - info@tecnick.com - http://www.tcpdf.org
// Version     : 4.8.038
// License     : GNU LGPL (http://www.gnu.org/copyleft/lesser.html)
// 	----------------------------------------------------------------------------
//  Copyright (C) 2002-2010  Nicola Asuni - Tecnick.com S.r.l.
// 	
// 	This program is free software: you can redistribute it and/or modify
// 	it under the terms of the GNU Lesser General Public License as published by
// 	the Free Software Foundation, either version 2.1 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 Lesser General Public License for more details.
// 	
// 	You should have received a copy of the GNU Lesser General Public License
// 	along with this program.  If not, see <http://www.gnu.org/licenses/>.
// 	
// 	See LICENSE.TXT file for more information.
//  ----------------------------------------------------------------------------
//
// Description : This is a PHP class for generating PDF documents without 
//               requiring external extensions.
//
// NOTE:
// This class was originally derived in 2002 from the Public 
// Domain FPDF class by Olivier Plathey (http://www.fpdf.org), 
// but now is almost entirely rewritten.
//
// Main features:
//  * no external libraries are required for the basic functions;
// 	* supports all ISO page formats;
// 	* supports custom page formats, margins and units of measure;
// 	* supports UTF-8 Unicode and Right-To-Left languages;
// 	* supports TrueTypeUnicode, OpenTypeUnicode, TrueType, OpenType, Type1 and CID-0 fonts;
// 	* supports document encryption;
// 	* includes methods to publish some XHTML code, including forms;
// 	* includes graphic (geometric) and transformation methods;
// 	* includes Javascript and Forms support;
// 	* includes a method to print various barcode formats: CODE 39, ANSI MH10.8M-1983, USD-3, 3 of 9, CODE 93, USS-93, Standard 2 of 5, Interleaved 2 of 5, CODE 128 A/B/C, 2 and 5 Digits UPC-Based Extention, EAN 8, EAN 13, UPC-A, UPC-E, MSI, POSTNET, PLANET, RMS4CC (Royal Mail 4-state Customer Code), CBC (Customer Bar Code), KIX (Klant index - Customer index), Intelligent Mail Barcode, Onecode, USPS-B-3200, CODABAR, CODE 11, PHARMACODE, PHARMACODE TWO-TRACKS;
// 	* includes methods to set Bookmarks and print a Table of Content;
// 	* includes methods to move and delete pages;
// 	* includes methods for automatic page header and footer management;
// 	* supports automatic page break;
// 	* supports automatic page numbering and page groups;
// 	* supports automatic line break and text justification;
// 	* supports JPEG and PNG images natively, all images supported by GD (GD, GD2, GD2PART, GIF, JPEG, PNG, BMP, XBM, XPM) and all images supported via ImagMagick (http://www.imagemagick.org/www/formats.html)
// 	* supports stroke and clipping mode for text;
// 	* supports clipping masks;
// 	* supports Grayscale, RGB, CMYK, Spot Colors and Transparencies;
// 	* supports several annotations, including links, text and file attachments;
// 	* supports page compression (requires zlib extension);
//  * supports text hyphenation.
//  * supports transactions to UNDO commands.
//  * supports signature certifications.
//
// -----------------------------------------------------------
// THANKS TO:
// 
// Olivier Plathey (http://www.fpdf.org) for original FPDF.
// Efthimios Mavrogeorgiadis (emavro@yahoo.com) for suggestions on RTL language support.
// Klemen Vodopivec (http://www.fpdf.de/downloads/addons/37/) for Encryption algorithm.
// Warren Sherliker (wsherliker@gmail.com) for better image handling.
// dullus for text Justification.
// Bob Vincent (pillarsdotnet@users.sourceforge.net) for <li> value attribute.
// Patrick Benny for text stretch suggestion on Cell().
// Johannes G�ntert for JavaScript support.
// Denis Van Nuffelen for Dynamic Form.
// Jacek Czekaj for multibyte justification
// Anthony Ferrara for the reintroduction of legacy image methods.
// Sourceforge user 1707880 (hucste) for line-trough mode.
// Larry Stanbery for page groups.
// Martin Hall-May for transparency.
// Aaron C. Spike for Polycurve method.
// Mohamad Ali Golkar, Saleh AlMatrafe, Charles Abbott for Arabic and Persian support.
// Moritz Wagner and Andreas Wurmser for graphic functions.
// Andrew Whitehead for core fonts support.
// Esteban Jo�l Mar�n for OpenType font conversion.
// Teus Hagen for several suggestions and fixes.
// Yukihiro Nakadaira for CID-0 CJK fonts fixes.
// Kosmas Papachristos for some CSS improvements.
// Marcel Partap for some fixes.
// Won Kyu Park for several suggestions, fixes and patches.
// Anyone that has reported a bug or sent a suggestion.
//============================================================+




/**
 * This is a PHP class for generating PDF documents without requiring external extensions.<br>
 * TCPDF project (http://www.tcpdf.org) was originally derived in 2002 from the Public Domain FPDF class by Olivier Plathey (http://www.fpdf.org), but now is almost entirely rewritten.<br>
 * <h3>TCPDF main features are:</h3>
 * <ul>
 * <li>no external libraries are required for the basic functions;</li>
 * <li>supports all ISO page formats;</li>
 * <li>supports custom page formats, margins and units of measure;</li>
 * <li>supports UTF-8 Unicode and Right-To-Left languages;</li>
 * <li>supports TrueTypeUnicode, OpenTypeUnicode, TrueType, OpenType, Type1 and CID-0 fonts;</li>
 * <li>supports document encryption;</li>
 * <li>includes methods to publish some XHTML code, including forms;</li>
 * <li>includes graphic (geometric) and transformation methods;</li>
 * <li>includes Javascript and Forms support;</li>
 * <li>includes a method to print various barcode formats: CODE 39, ANSI MH10.8M-1983, USD-3, 3 of 9, CODE 93, USS-93, Standard 2 of 5, Interleaved 2 of 5, CODE 128 A/B/C, 2 and 5 Digits UPC-Based Extention, EAN 8, EAN 13, UPC-A, UPC-E, MSI, POSTNET, PLANET, RMS4CC (Royal Mail 4-state Customer Code), CBC (Customer Bar Code), KIX (Klant index - Customer index), Intelligent Mail Barcode, Onecode, USPS-B-3200, CODABAR, CODE 11, PHARMACODE, PHARMACODE TWO-TRACKS</li>
 * <li>includes methods to set Bookmarks and print a Table of Content;</li>
 * <li>includes methods to move and delete pages;</li>
 * <li>includes methods for automatic page header and footer management;</li>
 * <li>supports automatic page break;</li>
 * <li>supports automatic page numbering and page groups;</li>
 * <li>supports automatic line break and text justification;</li>
 * <li>supports JPEG and PNG images natively, all images supported by GD (GD, GD2, GD2PART, GIF, JPEG, PNG, BMP, XBM, XPM) and all images supported via ImagMagick (http://www.imagemagick.org/www/formats.html)</li>
 * <li>supports stroke and clipping mode for text;</li>
 * <li>supports clipping masks;</li>
 * <li>supports Grayscale, RGB, CMYK, Spot Colors and Transparencies;</li>
 * <li>supports several annotations, including links, text and file attachments;</li>
 * <li>supports page compression (requires zlib extension);</li>
 * <li>supports text hyphenation.</li>
 * <li>supports transactions to UNDO commands.</li>
 * <li>supports signature certifications.</li>
 * </ul>
 * Tools to encode your unicode fonts are on fonts/utils directory.</p>
 * @package com.tecnick.tcpdf
 * @abstract Class for generating PDF files on-the-fly without requiring external extensions.
 * @author Nicola Asuni
 * @copyright 2002-2010 Nicola Asuni - Tecnick.com S.r.l (www.tecnick.com) Via Della Pace, 11 - 09044 - Quartucciu (CA) - ITALY - www.tecnick.com - info@tecnick.com
 * @link http://www.tcpdf.org
 * @license http://www.gnu.org/copyleft/lesser.html LGPL
 * @version 4.8.038
 */



/**
 * main configuration file
 */

require_once (dirname(__FILE__) . '/config/tcpdf_config.php');



// includes some support files




/**
 * unicode data
 */

require_once (dirname(__FILE__) . '/unicode_data.php');



/**
 * html colors table
 */

require_once (dirname(__FILE__) . '/htmlcolors.php');



if (! class_exists('TCPDF', false))

{

    /**
     * define default PDF document producer
     */

    define('PDF_PRODUCER', 'TCPDF 4.8.038 (http://www.tcpdf.org)');

    

    /**
     * This is a PHP class for generating PDF documents without requiring external extensions.<br>
     * TCPDF project (http://www.tcpdf.org) has been originally derived in 2002 from the Public Domain FPDF class by Olivier Plathey (http://www.fpdf.org), but now is almost entirely rewritten.<br>
     * @name TCPDF
     * @package com.tecnick.tcpdf
     * @version 4.8.038
     * @author Nicola Asuni - info@tecnick.com
     * @link http://www.tcpdf.org
     * @license http://www.gnu.org/copyleft/lesser.html LGPL
     */

    class TCPDF

    {

        

        // protected or Protected properties
        



        /**
         * @var current page number
         * @access protected
         */

        protected $page;

        

        /**
         * @var current object number
         * @access protected
         */

        protected $n;

        

        /**
         * @var array of object offsets
         * @access protected
         */

        protected $offsets;

        

        /**
         * @var buffer holding in-memory PDF
         * @access protected
         */

        protected $buffer;

        

        /**
         * @var array containing pages
         * @access protected
         */

        protected $pages = array();

        

        /**
         * @var current document state
         * @access protected
         */

        protected $state;

        

        /**
         * @var compression flag
         * @access protected
         */

        protected $compress;

        

        /**
         * @var current page orientation (P = Portrait, L = Landscape)
         * @access protected
         */

        protected $CurOrientation;

        

        /**
         * @var array that stores page dimensions and graphic status.<ul><li>$this->pagedim[$this->page]['w'] => page_width_in_points</li><li>$this->pagedim[$this->page]['h'] => height in points</li><li>$this->pagedim[$this->page]['wk'] => page_width_in_points</li><li>$this->pagedim[$this->page]['hk'] => height</li><li>$this->pagedim[$this->page]['tm'] => top_margin</li><li>$this->pagedim[$this->page]['bm'] => bottom_margin</li><li>$this->pagedim[$this->page]['lm'] => left_margin</li><li>$this->pagedim[$this->page]['rm'] => right_margin</li><li>$this->pagedim[$this->page]['pb'] => auto_page_break</li><li>$this->pagedim[$this->page]['or'] => page_orientation</li><li>$this->pagedim[$this->page]['olm'] => original_left_margin</li><li>$this->pagedim[$this->page]['orm'] => original_right_margin</li></ul>
         * @access protected
         */

        protected $pagedim = array();

        

        /**
         * @var scale factor (number of points in user unit)
         * @access protected
         */

        protected $k;

        

        /**
         * @var width of page format in points
         * @access protected
         */

        protected $fwPt;

        

        /**
         * @var height of page format in points
         * @access protected
         */

        protected $fhPt;

        

        /**
         * @var current width of page in points
         * @access protected
         */

        protected $wPt;

        

        /**
         * @var current height of page in points
         * @access protected
         */

        protected $hPt;

        

        /**
         * @var current width of page in user unit
         * @access protected
         */

        protected $w;

        

        /**
         * @var current height of page in user unit
         * @access protected
         */

        protected $h;

        

        /**
         * @var left margin
         * @access protected
         */

        protected $lMargin;

        

        /**
         * @var top margin
         * @access protected
         */

        protected $tMargin;

        

        /**
         * @var right margin
         * @access protected
         */

        protected $rMargin;

        

        /**
         * @var page break margin
         * @access protected
         */

        protected $bMargin;

        

        /**
         * @var cell internal padding
         * @access protected
         */

        //protected
        public $cMargin;

        

        /**
         * @var cell internal padding (previous value)
         * @access protected
         */

        protected $oldcMargin;

        

        /**
         * @var current horizontal position in user unit for cell positioning
         * @access protected
         */

        protected $x;

        

        /**
         * @var current vertical position in user unit for cell positioning
         * @access protected
         */

        protected $y;

        

        /**
         * @var height of last cell printed
         * @access protected
         */

        protected $lasth;

        

        /**
         * @var line width in user unit
         * @access protected
         */

        protected $LineWidth;

        

        /**
         * @var array of standard font names
         * @access protected
         */

        protected $CoreFonts;

        

        /**
         * @var array of used fonts
         * @access protected
         */

        protected $fonts = array();

        

        /**
         * @var array of font files
         * @access protected
         */

        protected $FontFiles = array();

        

        /**
         * @var array of encoding differences
         * @access protected
         */

        protected $diffs = array();

        

        /**
         * @var array of used images
         * @access protected
         */

        protected $images = array();

        

        /**
         * @var array of Annotations in pages
         * @access protected
         */

        protected $PageAnnots = array();

        

        /**
         * @var array of internal links
         * @access protected
         */

        protected $links = array();

        

        /**
         * @var current font family
         * @access protected
         */

        protected $FontFamily;

        

        /**
         * @var current font style
         * @access protected
         */

        protected $FontStyle;

        

        /**
         * @var current font ascent (distance between font top and baseline)
         * @access protected
         * @since 2.8.000 (2007-03-29)
         */

        protected $FontAscent;

        

        /**
         * @var current font descent (distance between font bottom and baseline)
         * @access protected
         * @since 2.8.000 (2007-03-29)
         */

        protected $FontDescent;

        

        /**
         * @var underlining flag
         * @access protected
         */

        protected $underline;

        

        /**
         * @var current font info
         * @access protected
         */

        protected $CurrentFont;

        

        /**
         * @var current font size in points
         * @access protected
         */

        protected $FontSizePt;

        

        /**
         * @var current font size in user unit
         * @access protected
         */

        protected $FontSize;

        

        /**
         * @var commands for drawing color
         * @access protected
         */

        protected $DrawColor;

        

        /**
         * @var commands for filling color
         * @access protected
         */

        protected $FillColor;

        

        /**
         * @var commands for text color
         * @access protected
         */

        protected $TextColor;

        

        /**
         * @var indicates whether fill and text colors are different
         * @access protected
         */

        protected $ColorFlag;

        

        /**
         * @var automatic page breaking
         * @access protected
         */

        protected $AutoPageBreak;

        

        /**
         * @var threshold used to trigger page breaks
         * @access protected
         */

        protected $PageBreakTrigger;

        

        /**
         * @var flag set when processing footer
         * @access protected
         */

        protected $InFooter = false;

        

        /**
         * @var zoom display mode
         * @access protected
         */

        protected $ZoomMode;

        

        /**
         * @var layout display mode
         * @access protected
         */

        protected $LayoutMode;

        

        /**
         * @var title
         * @access protected
         */

        protected $title = '';

        

        /**
         * @var subject
         * @access protected
         */

        protected $subject = '';

        

        /**
         * @var author
         * @access protected
         */

        protected $author = '';

        

        /**
         * @var keywords
         * @access protected
         */

        protected $keywords = '';

        

        /**
         * @var creator
         * @access protected
         */

        protected $creator = '';

        

        /**
         * @var alias for total number of pages
         * @access protected
         */

        protected $AliasNbPages = '{nb}';

        

        /**
         * @var alias for page number
         * @access protected
         */

        protected $AliasNumPage = '{pnb}';

        

        /**
         * @var right-bottom corner X coordinate of inserted image
         * @since 2002-07-31
         * @author Nicola Asuni
         * @access protected
         */

        protected $img_rb_x;

        

        /**
         * @var right-bottom corner Y coordinate of inserted image
         * @since 2002-07-31
         * @author Nicola Asuni
         * @access protected
         */

        protected $img_rb_y;

        

        /**
         * @var adjusting factor to convert pixels to user units.
         * @since 2004-06-14
         * @author Nicola Asuni
         * @access protected
         */

        protected $imgscale = 1;

        

        /**
         * @var boolean set to true when the input text is unicode (require unicode fonts)
         * @since 2005-01-02
         * @author Nicola Asuni
         * @access protected
         */

        protected $isunicode = false;

        

        /**
         * @var PDF version
         * @since 1.5.3
         * @access protected
         */

        protected $PDFVersion = '1.7';

        

        // ----------------------
        



        /**
         * @var Minimum distance between header and top page margin.
         * @access protected
         */

        protected $header_margin;

        

        /**
         * @var Minimum distance between footer and bottom page margin.
         * @access protected
         */

        protected $footer_margin;

        

        /**
         * @var original left margin value
         * @access protected
         * @since 1.53.0.TC013
         */

        protected $original_lMargin;

        

        /**
         * @var original right margin value
         * @access protected
         * @since 1.53.0.TC013
         */

        protected $original_rMargin;

        

        /**
         * @var Header font.
         * @access protected
         */

        protected $header_font;

        

        /**
         * @var Footer font.
         * @access protected
         */

        protected $footer_font;

        

        /**
         * @var Language templates.
         * @access protected
         */

        protected $l;

        

        /**
         * @var Barcode to print on page footer (only if set).
         * @access protected
         */

        protected $barcode = false;

        

        /**
         * @var If true prints header
         * @access protected
         */

        protected $print_header = true;

        

        /**
         * @var If true prints footer.
         * @access protected
         */

        protected $print_footer = true;

        

        /**
         * @var Header image logo.
         * @access protected
         */

        protected $header_logo = '';

        

        /**
         * @var Header image logo width in mm.
         * @access protected
         */

        protected $header_logo_width = 30;

        

        /**
         * @var String to print as title on document header.
         * @access protected
         */

        protected $header_title = '';

        

        /**
         * @var String to print on document header.
         * @access protected
         */

        protected $header_string = '';

        

        /**
         * @var Default number of columns for html table.
         * @access protected
         */

        protected $default_table_columns = 4;

        

        // variables for html parser
        



        /**
         * @var HTML PARSER: array to store current link and rendering styles.
         * @access protected
         */

        protected $HREF = array();

        

        /**
         * @var store a list of available fonts on filesystem.
         * @access protected
         */

        protected $fontlist = array();

        

        /**
         * @var current foreground color
         * @access protected
         */

        protected $fgcolor;

        

        /**
         * @var HTML PARSER: array of boolean values, true in case of ordered list (OL), false otherwise.
         * @access protected
         */

        protected $listordered = array();

        

        /**
         * @var HTML PARSER: array count list items on nested lists.
         * @access protected
         */

        protected $listcount = array();

        

        /**
         * @var HTML PARSER: current list nesting level.
         * @access protected
         */

        protected $listnum = 0;

        

        /**
         * @var HTML PARSER: indent amount for lists.
         * @access protected
         */

        protected $listindent;

        

        /**
         * @var current background color
         * @access protected
         */

        protected $bgcolor;

        

        /**
         * @var Store temporary font size in points.
         * @access protected
         */

        protected $tempfontsize = 10;

        

        /**
         * @var spacer for LI tags.
         * @access protected
         */

        protected $lispacer = '';

        

        /**
         * @var default encoding
         * @access protected
         * @since 1.53.0.TC010
         */

        protected $encoding = 'UTF-8';

        

        /**
         * @var PHP internal encoding
         * @access protected
         * @since 1.53.0.TC016
         */

        protected $internal_encoding;

        

        /**
         * @var indicates if the document language is Right-To-Left
         * @access protected
         * @since 2.0.000
         */

        protected $rtl = false;

        

        /**
         * @var used to force RTL or LTR string inversion
         * @access protected
         * @since 2.0.000
         */

        protected $tmprtl = false;

        

        // --- Variables used for document encryption:
        



        /**
         * Indicates whether document is protected
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $encrypted;

        

        /**
         * U entry in pdf document
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $Uvalue;

        

        /**
         * O entry in pdf document
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $Ovalue;

        

        /**
         * P entry in pdf document
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $Pvalue;

        

        /**
         * encryption object id
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $enc_obj_id;

        

        /**
         * last RC4 key encrypted (cached for optimisation)
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $last_rc4_key;

        

        /**
         * last RC4 computed key
         * @access protected
         * @since 2.0.000 (2008-01-02)
         */

        protected $last_rc4_key_c;

        

        /**
         * RC4 padding
         * @access protected
         */

        protected $padding = "\x28\xBF\x4E\x5E\x4E\x75\x8A\x41\x64\x00\x4E\x56\xFF\xFA\x01\x08\x2E\x2E\x00\xB6\xD0\x68\x3E\x80\x2F\x0C\xA9\xFE\x64\x53\x69\x7A";

        

        /**
         * RC4 encryption key
         * @access protected
         */

        protected $encryption_key;

        

        // --- bookmark ---
        



        /**
         * Outlines for bookmark
         * @access protected
         * @since 2.1.002 (2008-02-12)
         */

        protected $outlines = array();

        

        /**
         * Outline root for bookmark
         * @access protected
         * @since 2.1.002 (2008-02-12)
         */

        protected $OutlineRoot;

        

        // --- javascript and form ---
        



        /**
         * javascript code
         * @access protected
         * @since 2.1.002 (2008-02-12)
         */

        protected $javascript = '';

        

        /**
         * javascript counter
         * @access protected
         * @since 2.1.002 (2008-02-12)
         */

        protected $n_js;

        

        /**
         * line trough state
         * @access protected
         * @since 2.8.000 (2008-03-19)
         */

        protected $linethrough;

        

        // --- Variables used for User's Rights ---
        // See PDF reference chapter 8.7 Digital Signatures
        



        /**
         * If true enables user's rights on PDF reader
         * @access protected
         * @since 2.9.000 (2008-03-26)
         */

        protected $ur;

        

        /**
         * Names specifying additional document-wide usage rights for the document.
         * @access protected
         * @since 2.9.000 (2008-03-26)
         */

        protected $ur_document;

        

        /**
         * Names specifying additional annotation-related usage rights for the document.
         * @access protected
         * @since 2.9.000 (2008-03-26)
         */

        protected $ur_annots;

        

        /**
         * Names specifying additional form-field-related usage rights for the document.
         * @access protected
         * @since 2.9.000 (2008-03-26)
         */

        protected $ur_form;

        

        /**
         * Names specifying additional signature-related usage rights for the document.
         * @access protected
         * @since 2.9.000 (2008-03-26)
         */

        protected $ur_signature;

        

        /**
         * Dot Per Inch Document Resolution (do not change)
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $dpi = 72;

        

        /**
         * Array of page numbers were a new page group was started
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $newpagegroup = array();

        

        /**
         * Contains the number of pages of the groups
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $pagegroups;

        

        /**
         * Contains the alias of the current page group
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $currpagegroup;

        

        /**
         * Restrict the rendering of some elements to screen or printout.
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $visibility = 'all';

        

        /**
         * Print visibility.
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $n_ocg_print;

        

        /**
         * View visibility.
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $n_ocg_view;

        

        /**
         * Array of transparency objects and parameters.
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $extgstates;

        

        /**
         * Set the default JPEG compression quality (1-100)
         * @access protected
         * @since 3.0.000 (2008-03-27)
         */

        protected $jpeg_quality;

        

        /**
         * Default cell height ratio.
         * @access protected
         * @since 3.0.014 (2008-05-23)
         */

        protected $cell_height_ratio = K_CELL_HEIGHT_RATIO;

        

        /**
         * PDF viewer preferences.
         * @access protected
         * @since 3.1.000 (2008-06-09)
         */

        protected $viewer_preferences;

        

        /**
         * A name object specifying how the document should be displayed when opened.
         * @access protected
         * @since 3.1.000 (2008-06-09)
         */

        protected $PageMode;

        

        /**
         * Array for storing gradient information.
         * @access protected
         * @since 3.1.000 (2008-06-09)
         */

        protected $gradients = array();

        

        /**
         * Array used to store positions inside the pages buffer.
         * keys are the page numbers
         * @access protected
         * @since 3.2.000 (2008-06-26)
         */

        protected $intmrk = array();

        

        /**
         * Array used to store content positions inside the pages buffer.
         * keys are the page numbers
         * @access protected
         * @since 4.6.021 (2009-07-20)
         */

        protected $cntmrk = array();

        

        /**
         * Array used to store footer positions of each page.
         * @access protected
         * @since 3.2.000 (2008-07-01)
         */

        protected $footerpos = array();

        

        /**
         * Array used to store footer length of each page.
         * @access protected
         * @since 4.0.014 (2008-07-29)
         */

        protected $footerlen = array();

        

        /**
         * True if a newline is created.
         * @access protected
         * @since 3.2.000 (2008-07-01)
         */

        protected $newline = true;

        

        /**
         * End position of the latest inserted line
         * @access protected
         * @since 3.2.000 (2008-07-01)
         */

        protected $endlinex = 0;

        

        /**
         * PDF string for last line width
         * @access protected
         * @since 4.0.006 (2008-07-16)
         */

        protected $linestyleWidth = '';

        

        /**
         * PDF string for last line width
         * @access protected
         * @since 4.0.006 (2008-07-16)
         */

        protected $linestyleCap = '0 J';

        

        /**
         * PDF string for last line width
         * @access protected
         * @since 4.0.006 (2008-07-16)
         */

        protected $linestyleJoin = '0 j';

        

        /**
         * PDF string for last line width
         * @access protected
         * @since 4.0.006 (2008-07-16)
         */

        protected $linestyleDash = '[] 0 d';

        

        /**
         * True if marked-content sequence is open
         * @access protected
         * @since 4.0.013 (2008-07-28)
         */

        protected $openMarkedContent = false;

        

        /**
         * Count the latest inserted vertical spaces on HTML
         * @access protected
         * @since 4.0.021 (2008-08-24)
         */

        protected $htmlvspace = 0;

        

        /**
         * Array of Spot colors
         * @access protected
         * @since 4.0.024 (2008-09-12)
         */

        protected $spot_colors = array();

        

        /**
         * Symbol used for HTML unordered list items
         * @access protected
         * @since 4.0.028 (2008-09-26)
         */

        protected $lisymbol = '';

        

        /**
         * String used to mark the beginning and end of EPS image blocks
         * @access protected
         * @since 4.1.000 (2008-10-18)
         */

        protected $epsmarker = 'x#!#EPS#!#x';

        

        /**
         * Array of transformation matrix
         * @access protected
         * @since 4.2.000 (2008-10-29)
         */

        protected $transfmatrix = array();

        

        /**
         * Current key for transformation matrix
         * @access protected
         * @since 4.8.005 (2009-09-17)
         */

        protected $transfmatrix_key = 0;

        

        /**
         * Booklet mode for double-sided pages
         * @access protected
         * @since 4.2.000 (2008-10-29)
         */

        protected $booklet = false;

        

        /**
         * Epsilon value used for float calculations
         * @access protected
         * @since 4.2.000 (2008-10-29)
         */

        protected $feps = 0.005;

        

        /**
         * Array used for custom vertical spaces for HTML tags
         * @access protected
         * @since 4.2.001 (2008-10-30)
         */

        protected $tagvspaces = array();

        

        /**
         * @var HTML PARSER: custom indent amount for lists.
         * Negative value means disabled.
         * @access protected
         * @since 4.2.007 (2008-11-12)
         */

        protected $customlistindent = - 1;

        

        /**
         * @var if true keeps the border open for the cell sides that cross the page.
         * @access protected
         * @since 4.2.010 (2008-11-14)
         */

        protected $opencell = true;

        

        /**
         * @var array of files to embedd
         * @access protected
         * @since 4.4.000 (2008-12-07)
         */

        protected $embeddedfiles = array();

        

        /**
         * @var boolean true when inside html pre tag
         * @access protected
         * @since 4.4.001 (2008-12-08)
         */

        protected $premode = false;

        

        /**
         * Array used to store positions of graphics transformation blocks inside the page buffer.
         * keys are the page numbers
         * @access protected
         * @since 4.4.002 (2008-12-09)
         */

        protected $transfmrk = array();

        

        /**
         * Default color for html links
         * @access protected
         * @since 4.4.003 (2008-12-09)
         */

        protected $htmlLinkColorArray = array(0, 0, 255);

        

        /**
         * Default font style to add to html links
         * @access protected
         * @since 4.4.003 (2008-12-09)
         */

        protected $htmlLinkFontStyle = 'U';

        

        /**
         * Counts the number of pages.
         * @access protected
         * @since 4.5.000 (2008-12-31)
         */

        protected $numpages = 0;

        

        /**
         * Array containing page lengths in bytes.
         * @access protected
         * @since 4.5.000 (2008-12-31)
         */

        protected $pagelen = array();

        

        /**
         * Counts the number of pages.
         * @access protected
         * @since 4.5.000 (2008-12-31)
         */

        protected $numimages = 0;

        

        /**
         * Store the image keys.
         * @access protected
         * @since 4.5.000 (2008-12-31)
         */

        protected $imagekeys = array();

        

        /**
         * Length of the buffer in bytes.
         * @access protected
         * @since 4.5.000 (2008-12-31)
         */

        protected $bufferlen = 0;

        

        /**
         * If true enables disk caching.
         * @access protected
         * @since 4.5.000 (2008-12-31)
         */

        protected $diskcache = false;

        

        /**
         * Counts the number of fonts.
         * @access protected
         * @since 4.5.000 (2009-01-02)
         */

        protected $numfonts = 0;

        

        /**
         * Store the font keys.
         * @access protected
         * @since 4.5.000 (2009-01-02)
         */

        protected $fontkeys = array();

        

        /**
         * Store the font object IDs.
         * @access protected
         * @since 4.8.001 (2009-09-09)
         */

        protected $font_obj_ids = array();

        

        /**
         * Store the fage status (true when opened, false when closed).
         * @access protected
         * @since 4.5.000 (2009-01-02)
         */

        protected $pageopen = array();

        

        /**
         * Default monospaced font
         * @access protected
         * @since 4.5.025 (2009-03-10)
         */

        protected $default_monospaced_font = 'courier';

        

        /**
         * Used to store a cloned copy of the current class object
         * @access protected
         * @since 4.5.029 (2009-03-19)
         */

        protected $objcopy;

        

        /**
         * Array used to store the lengths of cache files
         * @access protected
         * @since 4.5.029 (2009-03-19)
         */

        protected $cache_file_length = array();

        

        /**
         * Table header content to be repeated on each new page
         * @access protected
         * @since 4.5.030 (2009-03-20)
         */

        protected $thead = '';

        

        /**
         * Margins used for table header.
         * @access protected
         * @since 4.5.030 (2009-03-20)
         */

        protected $theadMargins = array();

        

        /**
         * Cache array for UTF8StringToArray() method.
         * @access protected
         * @since 4.5.037 (2009-04-07)
         */

        protected $cache_UTF8StringToArray = array();

        

        /**
         * Maximum size of cache array used for UTF8StringToArray() method.
         * @access protected
         * @since 4.5.037 (2009-04-07)
         */

        protected $cache_maxsize_UTF8StringToArray = 8;

        

        /**
         * Current size of cache array used for UTF8StringToArray() method.
         * @access protected
         * @since 4.5.037 (2009-04-07)
         */

        protected $cache_size_UTF8StringToArray = 0;

        

        /**
         * If true enables document signing
         * @access protected
         * @since 4.6.005 (2009-04-24)
         */

        protected $sign = false;

        

        /**
         * Signature data
         * @access protected
         * @since 4.6.005 (2009-04-24)
         */

        protected $signature_data = array();

        

        /**
         * Signature max length
         * @access protected
         * @since 4.6.005 (2009-04-24)
         */

        protected $signature_max_length = 11742;

        

        /**
         * Regular expression used to find blank characters used for word-wrapping.
         * @access protected
         * @since 4.6.006 (2009-04-28)
         */

        protected $re_spaces = '/[\s]/';

        

        /**
         * Signature object ID
         * @access protected
         * @since 4.6.022 (2009-06-23)
         */

        protected $sig_obj_id = 0;

        

        /**
         * ByteRange placemark used during signature process.
         * @access protected
         * @since 4.6.028 (2009-08-25)
         */

        protected $byterange_string = '/ByteRange[0 ********** ********** **********]';

        

        /**
         * Placemark used during signature process.
         * @access protected
         * @since 4.6.028 (2009-08-25)
         */

        protected $sig_annot_ref = '***SIGANNREF*** 0 R';

        

        /**
         * ID of page objects
         * @access protected
         * @since 4.7.000 (2009-08-29)
         */

        protected $page_obj_id = array();

        

        /**
         * Start ID for embedded file objects
         * @access protected
         * @since 4.7.000 (2009-08-29)
         */

        protected $embedded_start_obj_id = 100000;

        

        /**
         * Start ID for annotation objects
         * @access protected
         * @since 4.7.000 (2009-08-29)
         */

        protected $annots_start_obj_id = 200000;

        

        /**
         * Max ID of annotation object
         * @access protected
         * @since 4.7.000 (2009-08-29)
         */

        protected $annot_obj_id = 200000;

        

        /**
         * Current ID of annotation object
         * @access protected
         * @since 4.8.003 (2009-09-15)
         */

        protected $curr_annot_obj_id = 200000;

        

        /**
         * List of form annotations IDs
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $form_obj_id = array();

        

        /**
         * Deafult Javascript field properties. Possible values are described on official Javascript for Acrobat API reference. Annotation options can be directly specified using the 'aopt' entry.
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $default_form_prop = array('lineWidth' => 1, 'borderStyle' => 'solid', 

                'fillColor' => array(255, 255, 255), 'strokeColor' => array(128, 128, 128));

        

        /**
         * Javascript objects array
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $js_objects = array();

        

        /**
         * Start ID for javascript objects
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $js_start_obj_id = 300000;

        

        /**
         * Current ID of javascript object
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $js_obj_id = 300000;

        

        /**
         * Current form action (used during XHTML rendering)
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $form_action = '';

        

        /**
         * Current form encryption type (used during XHTML rendering)
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $form_enctype = 'application/x-www-form-urlencoded';

        

        /**
         * Current method to submit forms.
         * @access protected
         * @since 4.8.000 (2009-09-07)
         */

        protected $form_mode = 'post';

        

        /**
         * Start ID for appearance streams XObjects
         * @access protected
         * @since 4.8.001 (2009-09-09)
         */

        protected $apxo_start_obj_id = 400000;

        

        /**
         * Current ID of appearance streams XObjects
         * @access protected
         * @since 4.8.001 (2009-09-09)
         */

        protected $apxo_obj_id = 400000;

        

        /**
         * List of fonts used on form fields (fontname => fontkey).
         * @access protected
         * @since 4.8.001 (2009-09-09)
         */

        protected $annotation_fonts = array();

        

        /**
         * List of radio buttons parent objects.
         * @access protected
         * @since 4.8.001 (2009-09-09)
         */

        protected $radiobutton_groups = array();

        

        /**
         * List of radio group objects IDs
         * @access protected
         * @since 4.8.001 (2009-09-09)
         */

        protected $radio_groups = array();

        

        /**
         * Text indentation value (used for text-indent CSS attribute) 
         * @access protected
         * @since 4.8.006 (2009-09-23)
         */

        protected $textindent = 0;

        

        /**
         * Store page number when startTransaction() is called.
         * @access protected
         * @since 4.8.006 (2009-09-23)
         */

        protected $start_transaction_page = 0;

        

        /**
         * True when we are printing the thead section on a new page
         * @access protected
         * @since 4.8.027 (2010-01-25)
         */

        protected $inthead = false;



        //------------------------------------------------------------
        // METHODS
        //------------------------------------------------------------
        



        /**
         * This is the class constructor. 
         * It allows to set up the page format, the orientation and 
         * the measure unit used in all the methods (except for the font sizes).
         * @since 1.0
         * @param string $orientation page orientation. Possible values are (case insensitive):<ul><li>P or Portrait (default)</li><li>L or Landscape</li></ul>
         * @param string $unit User measure unit. Possible values are:<ul><li>pt: point</li><li>mm: millimeter (default)</li><li>cm: centimeter</li><li>in: inch</li></ul><br />A point equals 1/72 of inch, that is to say about 0.35 mm (an inch being 2.54 cm). This is a very common unit in typography; font sizes are expressed in that unit.
         * @param mixed $format The format used for pages. It can be either one of the following values (case insensitive) or a custom format in the form of a two-element array containing the width and the height (expressed in the unit given by unit).<ul><li>4A0</li><li>2A0</li><li>A0</li><li>A1</li><li>A2</li><li>A3</li><li>A4 (default)</li><li>A5</li><li>A6</li><li>A7</li><li>A8</li><li>A9</li><li>A10</li><li>B0</li><li>B1</li><li>B2</li><li>B3</li><li>B4</li><li>B5</li><li>B6</li><li>B7</li><li>B8</li><li>B9</li><li>B10</li><li>C0</li><li>C1</li><li>C2</li><li>C3</li><li>C4</li><li>C5</li><li>C6</li><li>C7</li><li>C8</li><li>C9</li><li>C10</li><li>RA0</li><li>RA1</li><li>RA2</li><li>RA3</li><li>RA4</li><li>SRA0</li><li>SRA1</li><li>SRA2</li><li>SRA3</li><li>SRA4</li><li>LETTER</li><li>LEGAL</li><li>EXECUTIVE</li><li>FOLIO</li></ul>
         * @param boolean $unicode TRUE means that the input text is unicode (default = true)
         * @param boolean $diskcache if TRUE reduce the RAM memory usage by caching temporary data on filesystem (slower).
         * @param String $encoding charset encoding; default is UTF-8
         * @access public
         */

        public function __construct($orientation = 'P', $unit = 'mm', $format = 'A4', $unicode = true, $encoding = 'UTF-8', $diskcache = false)

        {

            /* Set internal character encoding to ASCII */

            if (function_exists('mb_internal_encoding') and mb_internal_encoding())

            {

                $this->internal_encoding = mb_internal_encoding();

                mb_internal_encoding('ASCII');

            }

            // set disk caching
            $this->diskcache = $diskcache ? true : false;

            // set language direction
            $this->rtl = false;

            $this->tmprtl = false;

            //Some checks
            $this->_dochecks();

            //Initialization of properties
            $this->isunicode = $unicode;

            $this->page = 0;

            $this->transfmrk[0] = array();

            $this->pagedim = array();

            $this->n = 2;

            $this->buffer = '';

            $this->pages = array();

            $this->state = 0;

            $this->fonts = array();

            $this->FontFiles = array();

            $this->diffs = array();

            $this->images = array();

            $this->links = array();

            $this->gradients = array();

            $this->InFooter = false;

            $this->lasth = 0;

            $this->FontFamily = 'helvetica';

            $this->FontStyle = '';

            $this->FontSizePt = 12;

            $this->underline = false;

            $this->linethrough = false;

            $this->DrawColor = '0 G';

            $this->FillColor = '0 g';

            $this->TextColor = '0 g';

            $this->ColorFlag = false;

            // encryption values
            $this->encrypted = false;

            $this->last_rc4_key = '';

            $this->padding = "\x28\xBF\x4E\x5E\x4E\x75\x8A\x41\x64\x00\x4E\x56\xFF\xFA\x01\x08\x2E\x2E\x00\xB6\xD0\x68\x3E\x80\x2F\x0C\xA9\xFE\x64\x53\x69\x7A";

            //Standard Unicode fonts
            $this->CoreFonts = array('courier' => 'Courier', 'courierB' => 'Courier-Bold', 

                    'courierI' => 'Courier-Oblique', 'courierBI' => 'Courier-BoldOblique', 'helvetica' => 'Helvetica', 

                    'helveticaB' => 'Helvetica-Bold', 'helveticaI' => 'Helvetica-Oblique', 

                    'helveticaBI' => 'Helvetica-BoldOblique', 'times' => 'Times-Roman', 'timesB' => 'Times-Bold', 

                    'timesI' => 'Times-Italic', 'timesBI' => 'Times-BoldItalic', 'symbol' => 'Symbol', 

                    'zapfdingbats' => 'ZapfDingbats');

            //Set scale factor
            $this->setPageUnit($unit);

            // set page format and orientation
            $this->setPageFormat($format, $orientation);

            //Page margins (1 cm)
            $margin = 28.35 / $this->k;

            $this->SetMargins($margin, $margin);

            //Interior cell margin
            $this->cMargin = $margin / 10;

            //Line width (0.2 mm)
…

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