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/lib/tcpdf/include/tcpdf_fonts.php

https://bitbucket.org/synergylearning/campusconnect
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Possible License(s): MPL-2.0-no-copyleft-exception, LGPL-3.0, GPL-3.0, LGPL-2.1, Apache-2.0, BSD-3-Clause, AGPL-3.0

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  1. <?php
    2. 

  2. //============================================================+
    3. 

  3. // File name   : tcpdf_fonts.php
    4. 

  4. // Version     : 1.0.009
    5. 

  5. // Begin       : 2008-01-01
    6. 

  6. // Last Update : 2013-09-04
    7. 

  7. // Author      : Nicola Asuni - Tecnick.com LTD - www.tecnick.com - info@tecnick.com
    8. 

  8. // License     : GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
    9. 

  9. // -------------------------------------------------------------------
    10. 

  10. // Copyright (C) 2008-2013 Nicola Asuni - Tecnick.com LTD
    11. 

  11. //
    12. 

  12. // This file is part of TCPDF software library.
    13. 

  13. //
    14. 

  14. // TCPDF is free software: you can redistribute it and/or modify it
    15. 

  15. // under the terms of the GNU Lesser General Public License as
    16. 

  16. // published by the Free Software Foundation, either version 3 of the
    17. 

  17. // License, or (at your option) any later version.
    18. 

  18. //
    19. 

  19. // TCPDF is distributed in the hope that it will be useful, but
    20. 

  20. // WITHOUT ANY WARRANTY; without even the implied warranty of
    21. 

  21. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    22. 

  22. // See the GNU Lesser General Public License for more details.
    23. 

  23. //
    24. 

  24. // You should have received a copy of the GNU Lesser General Public License
    25. 

  25. // along with TCPDF.  If not, see <http://www.gnu.org/licenses/>.
    26. 

  26. //
    27. 

  27. // See LICENSE.TXT file for more information.
    28. 

  28. // -------------------------------------------------------------------
    29. 

  29. //
    30. 

  30. // Description :Font methods for TCPDF library.
    31. 

  31. //
    32. 

  32. //============================================================+
    33. 

  33. 

  34. /**
    35. 

  35.  * @file
    36. 

  36.  * Unicode data and font methods for TCPDF library.
    37. 

  37.  * @author Nicola Asuni
    38. 

  38.  * @package com.tecnick.tcpdf
    39. 

  39.  */
    40. 

  40. 

  41. /**
    42. 

  42.  * @class TCPDF_FONTS
    43. 

  43.  * Font methods for TCPDF library.
    44. 

  44.  * @package com.tecnick.tcpdf
    45. 

  45.  * @version 1.0.009
    46. 

  46.  * @author Nicola Asuni - info@tecnick.com
    47. 

  47.  */
    48. 

  48. class TCPDF_FONTS {
    49. 

  49. 

  50. 	/**
    51. 

  51. 	 * Convert and add the selected TrueType or Type1 font to the fonts folder (that must be writeable).
    52. 

  52. 	 * @param $fontfile (string) Font file (full path).
    53. 

  53. 	 * @param $fonttype (string) Font type. Leave empty for autodetect mode. Valid values are: TrueTypeUnicode, TrueType, Type1, CID0JP = CID-0 Japanese, CID0KR = CID-0 Korean, CID0CS = CID-0 Chinese Simplified, CID0CT = CID-0 Chinese Traditional.
    54. 

  54. 	 * @param $enc (string) Name of the encoding table to use. Leave empty for default mode. Omit this parameter for TrueType Unicode and symbolic fonts like Symbol or ZapfDingBats.
    55. 

  55. 	 * @param $flags (int) Unsigned 32-bit integer containing flags specifying various characteristics of the font (PDF32000:2008 - 9.8.2 Font Descriptor Flags): +1 for fixed font; +4 for symbol or +32 for non-symbol; +64 for italic. Fixed and Italic mode are generally autodetected so you have to set it to 32 = non-symbolic font (default) or 4 = symbolic font.
    56. 

  56. 	 * @param $outpath (string) Output path for generated font files (must be writeable by the web server). Leave empty for default font folder.
    57. 

  57. 	 * @param $platid (int) Platform ID for CMAP table to extract (when building a Unicode font for Windows this value should be 3, for Macintosh should be 1).
    58. 

  58. 	 * @param $encid (int) Encoding ID for CMAP table to extract (when building a Unicode font for Windows this value should be 1, for Macintosh should be 0). When Platform ID is 3, legal values for Encoding ID are: 0=Symbol, 1=Unicode, 2=ShiftJIS, 3=PRC, 4=Big5, 5=Wansung, 6=Johab, 7=Reserved, 8=Reserved, 9=Reserved, 10=UCS-4.
    59. 

  59. 	 * @param $addcbbox (boolean) If true includes the character bounding box information on the php font file.
    60. 

  60. 	 * @param $link (boolean) If true link to system font instead of copying the font data (not transportable) - Note: do not work with Type1 fonts.
    61. 

  61. 	 * @return (string) TCPDF font name or boolean false in case of error.
    62. 

  62. 	 * @author Nicola Asuni
    63. 

  63. 	 * @since 5.9.123 (2010-09-30)
    64. 

  64. 	 * @public static
    65. 

  65. 	 */
    66. 

  66. 	public static function addTTFfont($fontfile, $fonttype='', $enc='', $flags=32, $outpath='', $platid=3, $encid=1, $addcbbox=false, $link=false) {
    67. 

  67. 		if (!file_exists($fontfile)) {
    68. 

  68. 			// Could not find file
    69. 

  69. 			return false;
    70. 

  70. 		}
    71. 

  71. 		// font metrics
    72. 

  72. 		$fmetric = array();
    73. 

  73. 		// build new font name for TCPDF compatibility
    74. 

  74. 		$font_path_parts = pathinfo($fontfile);
    75. 

  75. 		if (!isset($font_path_parts['filename'])) {
    76. 

  76. 			$font_path_parts['filename'] = substr($font_path_parts['basename'], 0, -(strlen($font_path_parts['extension']) + 1));
    77. 

  77. 		}
    78. 

  78. 		$font_name = strtolower($font_path_parts['filename']);
    79. 

  79. 		$font_name = preg_replace('/[^a-z0-9_]/', '', $font_name);
    80. 

  80. 		$search  = array('bold', 'oblique', 'italic', 'regular');
    81. 

  81. 		$replace = array('b', 'i', 'i', '');
    82. 

  82. 		$font_name = str_replace($search, $replace, $font_name);
    83. 

  83. 		if (empty($font_name)) {
    84. 

  84. 			// set generic name
    85. 

  85. 			$font_name = 'tcpdffont';
    86. 

  86. 		}
    87. 

  87. 		// set output path
    88. 

  88. 		if (empty($outpath)) {
    89. 

  89. 			$outpath = self::_getfontpath();
    90. 

  90. 		}
    91. 

  91. 		// check if this font already exist
    92. 

  92. 		if (@file_exists($outpath.$font_name.'.php')) {
    93. 

  93. 			// this font already exist (delete it from fonts folder to rebuild it)
    94. 

  94. 			return $font_name;
    95. 

  95. 		}
    96. 

  96. 		$fmetric['file'] = $font_name;
    97. 

  97. 		$fmetric['ctg'] = $font_name.'.ctg.z';
    98. 

  98. 		// get font data
    99. 

  99. 		$font = file_get_contents($fontfile);
    100. 

  100. 		$fmetric['originalsize'] = strlen($font);
    101. 

  101. 		// autodetect font type
    102. 

  102. 		if (empty($fonttype)) {
    103. 

  103. 			if (TCPDF_STATIC::_getULONG($font, 0) == 0x10000) {
    104. 

  104. 				// True Type (Unicode or not)
    105. 

  105. 				$fonttype = 'TrueTypeUnicode';
    106. 

  106. 			} elseif (substr($font, 0, 4) == 'OTTO') {
    107. 

  107. 				// Open Type (Unicode or not)
    108. 

  108. 				//Unsupported font format: OpenType with CFF data
    109. 

  109. 				return false;
    110. 

  110. 			} else {
    111. 

  111. 				// Type 1
    112. 

  112. 				$fonttype = 'Type1';
    113. 

  113. 			}
    114. 

  114. 		}
    115. 

  115. 		// set font type
    116. 

  116. 		switch ($fonttype) {
    117. 

  117. 			case 'CID0CT':
    118. 

  118. 			case 'CID0CS':
    119. 

  119. 			case 'CID0KR':
    120. 

  120. 			case 'CID0JP': {
    121. 

  121. 				$fmetric['type'] = 'cidfont0';
    122. 

  122. 				break;
    123. 

  123. 			}
    124. 

  124. 			case 'Type1': {
    125. 

  125. 				$fmetric['type'] = 'Type1';
    126. 

  126. 				if (empty($enc) AND (($flags & 4) == 0)) {
    127. 

  127. 					$enc = 'cp1252';
    128. 

  128. 				}
    129. 

  129. 				break;
    130. 

  130. 			}
    131. 

  131. 			case 'TrueType': {
    132. 

  132. 				$fmetric['type'] = 'TrueType';
    133. 

  133. 				break;
    134. 

  134. 			}
    135. 

  135. 			case 'TrueTypeUnicode':
    136. 

  136. 			default: {
    137. 

  137. 				$fmetric['type'] = 'TrueTypeUnicode';
    138. 

  138. 				break;
    139. 

  139. 			}
    140. 

  140. 		}
    141. 

  141. 		// set encoding maps (if any)
    142. 

  142. 		$fmetric['enc'] = preg_replace('/[^A-Za-z0-9_\-]/', '', $enc);
    143. 

  143. 		$fmetric['diff'] = '';
    144. 

  144. 		if (($fmetric['type'] == 'TrueType') OR ($fmetric['type'] == 'Type1')) {
    145. 

  145. 			if (!empty($enc) AND ($enc != 'cp1252') AND isset(TCPDF_FONT_DATA::$encmap[$enc])) {
    146. 

  146. 				// build differences from reference encoding
    147. 

  147. 				$enc_ref = TCPDF_FONT_DATA::$encmap['cp1252'];
    148. 

  148. 				$enc_target = TCPDF_FONT_DATA::$encmap[$enc];
    149. 

  149. 				$last = 0;
    150. 

  150. 				for ($i = 32; $i <= 255; ++$i) {
    151. 

  151. 					if ($enc_target != $enc_ref[$i]) {
    152. 

  152. 						if ($i != ($last + 1)) {
    153. 

  153. 							$fmetric['diff'] .= $i.' ';
    154. 

  154. 						}
    155. 

  155. 						$last = $i;
    156. 

  156. 						$fmetric['diff'] .= '/'.$enc_target[$i].' ';
    157. 

  157. 					}
    158. 

  158. 				}
    159. 

  159. 			}
    160. 

  160. 		}
    161. 

  161. 		// parse the font by type
    162. 

  162. 		if ($fmetric['type'] == 'Type1') {
    163. 

  163. 			// ---------- TYPE 1 ----------
    164. 

  164. 			// read first segment
    165. 

  165. 			$a = unpack('Cmarker/Ctype/Vsize', substr($font, 0, 6));
    166. 

  166. 			if ($a['marker'] != 128) {
    167. 

  167. 				// Font file is not a valid binary Type1
    168. 

  168. 				return false;
    169. 

  169. 			}
    170. 

  170. 			$fmetric['size1'] = $a['size'];
    171. 

  171. 			$data = substr($font, 6, $fmetric['size1']);
    172. 

  172. 			// read second segment
    173. 

  173. 			$a = unpack('Cmarker/Ctype/Vsize', substr($font, (6 + $fmetric['size1']), 6));
    174. 

  174. 			if ($a['marker'] != 128) {
    175. 

  175. 				// Font file is not a valid binary Type1
    176. 

  176. 				return false;
    177. 

  177. 			}
    178. 

  178. 			$fmetric['size2'] = $a['size'];
    179. 

  179. 			$encrypted = substr($font, (12 + $fmetric['size1']), $fmetric['size2']);
    180. 

  180. 			$data .= $encrypted;
    181. 

  181. 			// store compressed font
    182. 

  182. 			$fmetric['file'] .= '.z';
    183. 

  183. 			$fp = fopen($outpath.$fmetric['file'], 'wb');
    184. 

  184. 			fwrite($fp, gzcompress($data));
    185. 

  185. 			fclose($fp);
    186. 

  186. 			// get font info
    187. 

  187. 			$fmetric['Flags'] = $flags;
    188. 

  188. 			preg_match ('#/FullName[\s]*\(([^\)]*)#', $font, $matches);
    189. 

  189. 			$fmetric['name'] = preg_replace('/[^a-zA-Z0-9_\-]/', '', $matches[1]);
    190. 

  190. 			preg_match('#/FontBBox[\s]*{([^}]*)#', $font, $matches);
    191. 

  191. 			$fmetric['bbox'] = trim($matches[1]);
    192. 

  192. 			$bv = explode(' ', $fmetric['bbox']);
    193. 

  193. 			$fmetric['Ascent'] = intval($bv[3]);
    194. 

  194. 			$fmetric['Descent'] = intval($bv[1]);
    195. 

  195. 			preg_match('#/ItalicAngle[\s]*([0-9\+\-]*)#', $font, $matches);
    196. 

  196. 			$fmetric['italicAngle'] = intval($matches[1]);
    197. 

  197. 			if ($fmetric['italicAngle'] != 0) {
    198. 

  198. 				$fmetric['Flags'] |= 64;
    199. 

  199. 			}
    200. 

  200. 			preg_match('#/UnderlinePosition[\s]*([0-9\+\-]*)#', $font, $matches);
    201. 

  201. 			$fmetric['underlinePosition'] = intval($matches[1]);
    202. 

  202. 			preg_match('#/UnderlineThickness[\s]*([0-9\+\-]*)#', $font, $matches);
    203. 

  203. 			$fmetric['underlineThickness'] = intval($matches[1]);
    204. 

  204. 			preg_match('#/isFixedPitch[\s]*([^\s]*)#', $font, $matches);
    205. 

  205. 			if ($matches[1] == 'true') {
    206. 

  206. 				$fmetric['Flags'] |= 1;
    207. 

  207. 			}
    208. 

  208. 			// get internal map
    209. 

  209. 			$imap = array();
    210. 

  210. 			if (preg_match_all('#dup[\s]([0-9]+)[\s]*/([^\s]*)[\s]put#sU', $font, $fmap, PREG_SET_ORDER) > 0) {
    211. 

  211. 				foreach ($fmap as $v) {
    212. 

  212. 					$imap[$v[2]] = $v[1];
    213. 

  213. 				}
    214. 

  214. 			}
    215. 

  215. 			// decrypt eexec encrypted part
    216. 

  216. 			$r = 55665; // eexec encryption constant
    217. 

  217. 			$c1 = 52845;
    218. 

  218. 			$c2 = 22719;
    219. 

  219. 			$elen = strlen($encrypted);
    220. 

  220. 			$eplain = '';
    221. 

  221. 			for ($i = 0; $i < $elen; ++$i) {
    222. 

  222. 				$chr = ord($encrypted[$i]);
    223. 

  223. 				$eplain .= chr($chr ^ ($r >> 8));
    224. 

  224. 				$r = ((($chr + $r) * $c1 + $c2) % 65536);
    225. 

  225. 			}
    226. 

  226. 			if (preg_match('#/ForceBold[\s]*([^\s]*)#', $eplain, $matches) > 0) {
    227. 

  227. 				if ($matches[1] == 'true') {
    228. 

  228. 					$fmetric['Flags'] |= 0x40000;
    229. 

  229. 				}
    230. 

  230. 			}
    231. 

  231. 			if (preg_match('#/StdVW[\s]*\[([^\]]*)#', $eplain, $matches) > 0) {
    232. 

  232. 				$fmetric['StemV'] = intval($matches[1]);
    233. 

  233. 			} else {
    234. 

  234. 				$fmetric['StemV'] = 70;
    235. 

  235. 			}
    236. 

  236. 			if (preg_match('#/StdHW[\s]*\[([^\]]*)#', $eplain, $matches) > 0) {
    237. 

  237. 				$fmetric['StemH'] = intval($matches[1]);
    238. 

  238. 			} else {
    239. 

  239. 				$fmetric['StemH'] = 30;
    240. 

  240. 			}
    241. 

  241. 			if (preg_match('#/BlueValues[\s]*\[([^\]]*)#', $eplain, $matches) > 0) {
    242. 

  242. 				$bv = explode(' ', $matches[1]);
    243. 

  243. 				if (count($bv) >= 6) {
    244. 

  244. 					$v1 = intval($bv[2]);
    245. 

  245. 					$v2 = intval($bv[4]);
    246. 

  246. 					if ($v1 <= $v2) {
    247. 

  247. 						$fmetric['XHeight'] = $v1;
    248. 

  248. 						$fmetric['CapHeight'] = $v2;
    249. 

  249. 					} else {
    250. 

  250. 						$fmetric['XHeight'] = $v2;
    251. 

  251. 						$fmetric['CapHeight'] = $v1;
    252. 

  252. 					}
    253. 

  253. 				} else {
    254. 

  254. 					$fmetric['XHeight'] = 450;
    255. 

  255. 					$fmetric['CapHeight'] = 700;
    256. 

  256. 				}
    257. 

  257. 			} else {
    258. 

  258. 				$fmetric['XHeight'] = 450;
    259. 

  259. 				$fmetric['CapHeight'] = 700;
    260. 

  260. 			}
    261. 

  261. 			// get the number of random bytes at the beginning of charstrings
    262. 

  262. 			if (preg_match('#/lenIV[\s]*([0-9]*)#', $eplain, $matches) > 0) {
    263. 

  263. 				$lenIV = intval($matches[1]);
    264. 

  264. 			} else {
    265. 

  265. 				$lenIV = 4;
    266. 

  266. 			}
    267. 

  267. 			$fmetric['Leading'] = 0;
    268. 

  268. 			// get charstring data
    269. 

  269. 			$eplain = substr($eplain, (strpos($eplain, '/CharStrings') + 1));
    270. 

  270. 			preg_match_all('#/([A-Za-z0-9\.]*)[\s][0-9]+[\s]RD[\s](.*)[\s]ND#sU', $eplain, $matches, PREG_SET_ORDER);
    271. 

  271. 			if (!empty($enc) AND isset(TCPDF_FONT_DATA::$encmap[$enc])) {
    272. 

  272. 				$enc_map = TCPDF_FONT_DATA::$encmap[$enc];
    273. 

  273. 			} else {
    274. 

  274. 				$enc_map = false;
    275. 

  275. 			}
    276. 

  276. 			$fmetric['cw'] = '';
    277. 

  277. 			$fmetric['MaxWidth'] = 0;
    278. 

  278. 			$cwidths = array();
    279. 

  279. 			foreach ($matches as $k => $v) {
    280. 

  280. 				$cid = 0;
    281. 

  281. 				if (isset($imap[$v[1]])) {
    282. 

  282. 					$cid = $imap[$v[1]];
    283. 

  283. 				} elseif ($enc_map !== false) {
    284. 

  284. 					$cid = array_search($v[1], $enc_map);
    285. 

  285. 					if ($cid === false) {
    286. 

  286. 						$cid = 0;
    287. 

  287. 					} elseif ($cid > 1000) {
    288. 

  288. 						$cid -= 1000;
    289. 

  289. 					}
    290. 

  290. 				}
    291. 

  291. 				// decrypt charstring encrypted part
    292. 

  292. 				$r = 4330; // charstring encryption constant
    293. 

  293. 				$c1 = 52845;
    294. 

  294. 				$c2 = 22719;
    295. 

  295. 				$cd = $v[2];
    296. 

  296. 				$clen = strlen($cd);
    297. 

  297. 				$ccom = array();
    298. 

  298. 				for ($i = 0; $i < $clen; ++$i) {
    299. 

  299. 					$chr = ord($cd[$i]);
    300. 

  300. 					$ccom[] = ($chr ^ ($r >> 8));
    301. 

  301. 					$r = ((($chr + $r) * $c1 + $c2) % 65536);
    302. 

  302. 				}
    303. 

  303. 				// decode numbers
    304. 

  304. 				$cdec = array();
    305. 

  305. 				$ck = 0;
    306. 

  306. 				$i = $lenIV;
    307. 

  307. 				while ($i < $clen) {
    308. 

  308. 					if ($ccom[$i] < 32) {
    309. 

  309. 						$cdec[$ck] = $ccom[$i];
    310. 

  310. 						if (($ck > 0) AND ($cdec[$ck] == 13)) {
    311. 

  311. 							// hsbw command: update width
    312. 

  312. 							$cwidths[$cid] = $cdec[($ck - 1)];
    313. 

  313. 						}
    314. 

  314. 						++$i;
    315. 

  315. 					} elseif (($ccom[$i] >= 32) AND ($ccom[$i] <= 246)) {
    316. 

  316. 						$cdec[$ck] = ($ccom[$i] - 139);
    317. 

  317. 						++$i;
    318. 

  318. 					} elseif (($ccom[$i] >= 247) AND ($ccom[$i] <= 250)) {
    319. 

  319. 						$cdec[$ck] = ((($ccom[$i] - 247) * 256) + $ccom[($i + 1)] + 108);
    320. 

  320. 						$i += 2;
    321. 

  321. 					} elseif (($ccom[$i] >= 251) AND ($ccom[$i] <= 254)) {
    322. 

  322. 						$cdec[$ck] = ((-($ccom[$i] - 251) * 256) - $ccom[($i + 1)] - 108);
    323. 

  323. 						$i += 2;
    324. 

  324. 					} elseif ($ccom[$i] == 255) {
    325. 

  325. 						$sval = chr($ccom[($i + 1)]).chr($ccom[($i + 2)]).chr($ccom[($i + 3)]).chr($ccom[($i + 4)]);
    326. 

  326. 						$vsval = unpack('li', $sval);
    327. 

  327. 						$cdec[$ck] = $vsval['i'];
    328. 

  328. 						$i += 5;
    329. 

  329. 					}
    330. 

  330. 					++$ck;
    331. 

  331. 				}
    332. 

  332. 			} // end for each matches
    333. 

  333. 			$fmetric['MissingWidth'] = $cwidths[0];
    334. 

  334. 			$fmetric['MaxWidth'] = $fmetric['MissingWidth'];
    335. 

  335. 			$fmetric['AvgWidth'] = 0;
    336. 

  336. 			// set chars widths
    337. 

  337. 			for ($cid = 0; $cid <= 255; ++$cid) {
    338. 

  338. 				if (isset($cwidths[$cid])) {
    339. 

  339. 					if ($cwidths[$cid] > $fmetric['MaxWidth']) {
    340. 

  340. 						$fmetric['MaxWidth'] = $cwidths[$cid];
    341. 

  341. 					}
    342. 

  342. 					$fmetric['AvgWidth'] += $cwidths[$cid];
    343. 

  343. 					$fmetric['cw'] .= ','.$cid.'=>'.$cwidths[$cid];
    344. 

  344. 				} else {
    345. 

  345. 					$fmetric['cw'] .= ','.$cid.'=>'.$fmetric['MissingWidth'];
    346. 

  346. 				}
    347. 

  347. 			}
    348. 

  348. 			$fmetric['AvgWidth'] = round($fmetric['AvgWidth'] / count($cwidths));
    349. 

  349. 		} else {
    350. 

  350. 			// ---------- TRUE TYPE ----------
    351. 

  351. 			if ($fmetric['type'] != 'cidfont0') {
    352. 

  352. 				if ($link) {
    353. 

  353. 					// creates a symbolic link to the existing font
    354. 

  354. 					symlink($fontfile, $outpath.$fmetric['file']);
    355. 

  355. 				} else {
    356. 

  356. 					// store compressed font
    357. 

  357. 					$fmetric['file'] .= '.z';
    358. 

  358. 					$fp = fopen($outpath.$fmetric['file'], 'wb');
    359. 

  359. 					fwrite($fp, gzcompress($font));
    360. 

  360. 					fclose($fp);
    361. 

  361. 				}
    362. 

  362. 			}
    363. 

  363. 			$offset = 0; // offset position of the font data
    364. 

  364. 			if (TCPDF_STATIC::_getULONG($font, $offset) != 0x10000) {
    365. 

  365. 				// sfnt version must be 0x00010000 for TrueType version 1.0.
    366. 

  366. 				return false;
    367. 

  367. 			}
    368. 

  368. 			$offset += 4;
    369. 

  369. 			// get number of tables
    370. 

  370. 			$numTables = TCPDF_STATIC::_getUSHORT($font, $offset);
    371. 

  371. 			$offset += 2;
    372. 

  372. 			// skip searchRange, entrySelector and rangeShift
    373. 

  373. 			$offset += 6;
    374. 

  374. 			// tables array
    375. 

  375. 			$table = array();
    376. 

  376. 			// ---------- get tables ----------
    377. 

  377. 			for ($i = 0; $i < $numTables; ++$i) {
    378. 

  378. 				// get table info
    379. 

  379. 				$tag = substr($font, $offset, 4);
    380. 

  380. 				$offset += 4;
    381. 

  381. 				$table[$tag] = array();
    382. 

  382. 				$table[$tag]['checkSum'] = TCPDF_STATIC::_getULONG($font, $offset);
    383. 

  383. 				$offset += 4;
    384. 

  384. 				$table[$tag]['offset'] = TCPDF_STATIC::_getULONG($font, $offset);
    385. 

  385. 				$offset += 4;
    386. 

  386. 				$table[$tag]['length'] = TCPDF_STATIC::_getULONG($font, $offset);
    387. 

  387. 				$offset += 4;
    388. 

  388. 			}
    389. 

  389. 			// check magicNumber
    390. 

  390. 			$offset = $table['head']['offset'] + 12;
    391. 

  391. 			if (TCPDF_STATIC::_getULONG($font, $offset) != 0x5F0F3CF5) {
    392. 

  392. 				// magicNumber must be 0x5F0F3CF5
    393. 

  393. 				return false;
    394. 

  394. 			}
    395. 

  395. 			$offset += 4;
    396. 

  396. 			$offset += 2; // skip flags
    397. 

  397. 			// get FUnits
    398. 

  398. 			$fmetric['unitsPerEm'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    399. 

  399. 			$offset += 2;
    400. 

  400. 			// units ratio constant
    401. 

  401. 			$urk = (1000 / $fmetric['unitsPerEm']);
    402. 

  402. 			$offset += 16; // skip created, modified
    403. 

  403. 			$xMin = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    404. 

  404. 			$offset += 2;
    405. 

  405. 			$yMin = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    406. 

  406. 			$offset += 2;
    407. 

  407. 			$xMax = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    408. 

  408. 			$offset += 2;
    409. 

  409. 			$yMax = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    410. 

  410. 			$offset += 2;
    411. 

  411. 			$fmetric['bbox'] = ''.$xMin.' '.$yMin.' '.$xMax.' '.$yMax.'';
    412. 

  412. 			$macStyle = TCPDF_STATIC::_getUSHORT($font, $offset);
    413. 

  413. 			$offset += 2;
    414. 

  414. 			// PDF font flags
    415. 

  415. 			$fmetric['Flags'] = $flags;
    416. 

  416. 			if (($macStyle & 2) == 2) {
    417. 

  417. 				// italic flag
    418. 

  418. 				$fmetric['Flags'] |= 64;
    419. 

  419. 			}
    420. 

  420. 			// get offset mode (indexToLocFormat : 0 = short, 1 = long)
    421. 

  421. 			$offset = $table['head']['offset'] + 50;
    422. 

  422. 			$short_offset = (TCPDF_STATIC::_getSHORT($font, $offset) == 0);
    423. 

  423. 			$offset += 2;
    424. 

  424. 			// get the offsets to the locations of the glyphs in the font, relative to the beginning of the glyphData table
    425. 

  425. 			$indexToLoc = array();
    426. 

  426. 			$offset = $table['loca']['offset'];
    427. 

  427. 			if ($short_offset) {
    428. 

  428. 				// short version
    429. 

  429. 				$tot_num_glyphs = floor($table['loca']['length'] / 2); // numGlyphs + 1
    430. 

  430. 				for ($i = 0; $i < $tot_num_glyphs; ++$i) {
    431. 

  431. 					$indexToLoc[$i] = TCPDF_STATIC::_getUSHORT($font, $offset) * 2;
    432. 

  432. 					$offset += 2;
    433. 

  433. 				}
    434. 

  434. 			} else {
    435. 

  435. 				// long version
    436. 

  436. 				$tot_num_glyphs = floor($table['loca']['length'] / 4); // numGlyphs + 1
    437. 

  437. 				for ($i = 0; $i < $tot_num_glyphs; ++$i) {
    438. 

  438. 					$indexToLoc[$i] = TCPDF_STATIC::_getULONG($font, $offset);
    439. 

  439. 					$offset += 4;
    440. 

  440. 				}
    441. 

  441. 			}
    442. 

  442. 			// get glyphs indexes of chars from cmap table
    443. 

  443. 			$offset = $table['cmap']['offset'] + 2;
    444. 

  444. 			$numEncodingTables = TCPDF_STATIC::_getUSHORT($font, $offset);
    445. 

  445. 			$offset += 2;
    446. 

  446. 			$encodingTables = array();
    447. 

  447. 			for ($i = 0; $i < $numEncodingTables; ++$i) {
    448. 

  448. 				$encodingTables[$i]['platformID'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    449. 

  449. 				$offset += 2;
    450. 

  450. 				$encodingTables[$i]['encodingID'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    451. 

  451. 				$offset += 2;
    452. 

  452. 				$encodingTables[$i]['offset'] = TCPDF_STATIC::_getULONG($font, $offset);
    453. 

  453. 				$offset += 4;
    454. 

  454. 			}
    455. 

  455. 			// ---------- get os/2 metrics ----------
    456. 

  456. 			$offset = $table['OS/2']['offset'];
    457. 

  457. 			$offset += 2; // skip version
    458. 

  458. 			// xAvgCharWidth
    459. 

  459. 			$fmetric['AvgWidth'] = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    460. 

  460. 			$offset += 2;
    461. 

  461. 			// usWeightClass
    462. 

  462. 			$usWeightClass = round(TCPDF_STATIC::_getUFWORD($font, $offset) * $urk);
    463. 

  463. 			// estimate StemV and StemH (400 = usWeightClass for Normal - Regular font)
    464. 

  464. 			$fmetric['StemV'] = round((70 * $usWeightClass) / 400);
    465. 

  465. 			$fmetric['StemH'] = round((30 * $usWeightClass) / 400);
    466. 

  466. 			$offset += 2;
    467. 

  467. 			$offset += 2; // usWidthClass
    468. 

  468. 			$fsType = TCPDF_STATIC::_getSHORT($font, $offset);
    469. 

  469. 			$offset += 2;
    470. 

  470. 			if ($fsType == 2) {
    471. 

  471. 				// This Font cannot be modified, embedded or exchanged in any manner without first obtaining permission of the legal owner.
    472. 

  472. 				return false;
    473. 

  473. 			}
    474. 

  474. 			// ---------- get font name ----------
    475. 

  475. 			$fmetric['name'] = '';
    476. 

  476. 			$offset = $table['name']['offset'];
    477. 

  477. 			$offset += 2; // skip Format selector (=0).
    478. 

  478. 			// Number of NameRecords that follow n.
    479. 

  479. 			$numNameRecords = TCPDF_STATIC::_getUSHORT($font, $offset);
    480. 

  480. 			$offset += 2;
    481. 

  481. 			// Offset to start of string storage (from start of table).
    482. 

  482. 			$stringStorageOffset = TCPDF_STATIC::_getUSHORT($font, $offset);
    483. 

  483. 			$offset += 2;
    484. 

  484. 			for ($i = 0; $i < $numNameRecords; ++$i) {
    485. 

  485. 				$offset += 6; // skip Platform ID, Platform-specific encoding ID, Language ID.
    486. 

  486. 				// Name ID.
    487. 

  487. 				$nameID = TCPDF_STATIC::_getUSHORT($font, $offset);
    488. 

  488. 				$offset += 2;
    489. 

  489. 				if ($nameID == 6) {
    490. 

  490. 					// String length (in bytes).
    491. 

  491. 					$stringLength = TCPDF_STATIC::_getUSHORT($font, $offset);
    492. 

  492. 					$offset += 2;
    493. 

  493. 					// String offset from start of storage area (in bytes).
    494. 

  494. 					$stringOffset = TCPDF_STATIC::_getUSHORT($font, $offset);
    495. 

  495. 					$offset += 2;
    496. 

  496. 					$offset = ($table['name']['offset'] + $stringStorageOffset + $stringOffset);
    497. 

  497. 					$fmetric['name'] = substr($font, $offset, $stringLength);
    498. 

  498. 					$fmetric['name'] = preg_replace('/[^a-zA-Z0-9_\-]/', '', $fmetric['name']);
    499. 

  499. 					break;
    500. 

  500. 				} else {
    501. 

  501. 					$offset += 4; // skip String length, String offset
    502. 

  502. 				}
    503. 

  503. 			}
    504. 

  504. 			if (empty($fmetric['name'])) {
    505. 

  505. 				$fmetric['name'] = $font_name;
    506. 

  506. 			}
    507. 

  507. 			// ---------- get post data ----------
    508. 

  508. 			$offset = $table['post']['offset'];
    509. 

  509. 			$offset += 4; // skip Format Type
    510. 

  510. 			$fmetric['italicAngle'] = TCPDF_STATIC::_getFIXED($font, $offset);
    511. 

  511. 			$offset += 4;
    512. 

  512. 			$fmetric['underlinePosition'] = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    513. 

  513. 			$offset += 2;
    514. 

  514. 			$fmetric['underlineThickness'] = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    515. 

  515. 			$offset += 2;
    516. 

  516. 			$isFixedPitch = (TCPDF_STATIC::_getULONG($font, $offset) == 0) ? false : true;
    517. 

  517. 			$offset += 2;
    518. 

  518. 			if ($isFixedPitch) {
    519. 

  519. 				$fmetric['Flags'] |= 1;
    520. 

  520. 			}
    521. 

  521. 			// ---------- get hhea data ----------
    522. 

  522. 			$offset = $table['hhea']['offset'];
    523. 

  523. 			$offset += 4; // skip Table version number
    524. 

  524. 			// Ascender
    525. 

  525. 			$fmetric['Ascent'] = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    526. 

  526. 			$offset += 2;
    527. 

  527. 			// Descender
    528. 

  528. 			$fmetric['Descent'] = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    529. 

  529. 			$offset += 2;
    530. 

  530. 			// LineGap
    531. 

  531. 			$fmetric['Leading'] = round(TCPDF_STATIC::_getFWORD($font, $offset) * $urk);
    532. 

  532. 			$offset += 2;
    533. 

  533. 			// advanceWidthMax
    534. 

  534. 			$fmetric['MaxWidth'] = round(TCPDF_STATIC::_getUFWORD($font, $offset) * $urk);
    535. 

  535. 			$offset += 2;
    536. 

  536. 			$offset += 22; // skip some values
    537. 

  537. 			// get the number of hMetric entries in hmtx table
    538. 

  538. 			$numberOfHMetrics = TCPDF_STATIC::_getUSHORT($font, $offset);
    539. 

  539. 			// ---------- get maxp data ----------
    540. 

  540. 			$offset = $table['maxp']['offset'];
    541. 

  541. 			$offset += 4; // skip Table version number
    542. 

  542. 			// get the the number of glyphs in the font.
    543. 

  543. 			$numGlyphs = TCPDF_STATIC::_getUSHORT($font, $offset);
    544. 

  544. 			// ---------- get CIDToGIDMap ----------
    545. 

  545. 			$ctg = array();
    546. 

  546. 			foreach ($encodingTables as $enctable) {
    547. 

  547. 				// get only specified Platform ID and Encoding ID
    548. 

  548. 				if (($enctable['platformID'] == $platid) AND ($enctable['encodingID'] == $encid)) {
    549. 

  549. 					$offset = $table['cmap']['offset'] + $enctable['offset'];
    550. 

  550. 					$format = TCPDF_STATIC::_getUSHORT($font, $offset);
    551. 

  551. 					$offset += 2;
    552. 

  552. 					switch ($format) {
    553. 

  553. 						case 0: { // Format 0: Byte encoding table
    554. 

  554. 							$offset += 4; // skip length and version/language
    555. 

  555. 							for ($c = 0; $c < 256; ++$c) {
    556. 

  556. 								$g = TCPDF_STATIC::_getBYTE($font, $offset);
    557. 

  557. 								$ctg[$c] = $g;
    558. 

  558. 								++$offset;
    559. 

  559. 							}
    560. 

  560. 							break;
    561. 

  561. 						}
    562. 

  562. 						case 2: { // Format 2: High-byte mapping through table
    563. 

  563. 							$offset += 4; // skip length and version/language
    564. 

  564. 							$numSubHeaders = 0;
    565. 

  565. 							for ($i = 0; $i < 256; ++$i) {
    566. 

  566. 								// Array that maps high bytes to subHeaders: value is subHeader index * 8.
    567. 

  567. 								$subHeaderKeys[$i] = (TCPDF_STATIC::_getUSHORT($font, $offset) / 8);
    568. 

  568. 								$offset += 2;
    569. 

  569. 								if ($numSubHeaders < $subHeaderKeys[$i]) {
    570. 

  570. 									$numSubHeaders = $subHeaderKeys[$i];
    571. 

  571. 								}
    572. 

  572. 							}
    573. 

  573. 							// the number of subHeaders is equal to the max of subHeaderKeys + 1
    574. 

  574. 							++$numSubHeaders;
    575. 

  575. 							// read subHeader structures
    576. 

  576. 							$subHeaders = array();
    577. 

  577. 							$numGlyphIndexArray = 0;
    578. 

  578. 							for ($k = 0; $k < $numSubHeaders; ++$k) {
    579. 

  579. 								$subHeaders[$k]['firstCode'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    580. 

  580. 								$offset += 2;
    581. 

  581. 								$subHeaders[$k]['entryCount'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    582. 

  582. 								$offset += 2;
    583. 

  583. 								$subHeaders[$k]['idDelta'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    584. 

  584. 								$offset += 2;
    585. 

  585. 								$subHeaders[$k]['idRangeOffset'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    586. 

  586. 								$offset += 2;
    587. 

  587. 								$subHeaders[$k]['idRangeOffset'] -= (2 + (($numSubHeaders - $k - 1) * 8));
    588. 

  588. 								$subHeaders[$k]['idRangeOffset'] /= 2;
    589. 

  589. 								$numGlyphIndexArray += $subHeaders[$k]['entryCount'];
    590. 

  590. 							}
    591. 

  591. 							for ($k = 0; $k < $numGlyphIndexArray; ++$k) {
    592. 

  592. 								$glyphIndexArray[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    593. 

  593. 								$offset += 2;
    594. 

  594. 							}
    595. 

  595. 							for ($i = 0; $i < 256; ++$i) {
    596. 

  596. 								$k = $subHeaderKeys[$i];
    597. 

  597. 								if ($k == 0) {
    598. 

  598. 									// one byte code
    599. 

  599. 									$c = $i;
    600. 

  600. 									$g = $glyphIndexArray[0];
    601. 

  601. 									$ctg[$c] = $g;
    602. 

  602. 								} else {
    603. 

  603. 									// two bytes code
    604. 

  604. 									$start_byte = $subHeaders[$k]['firstCode'];
    605. 

  605. 									$end_byte = $start_byte + $subHeaders[$k]['entryCount'];
    606. 

  606. 									for ($j = $start_byte; $j < $end_byte; ++$j) {
    607. 

  607. 										// combine high and low bytes
    608. 

  608. 										$c = (($i << 8) + $j);
    609. 

  609. 										$idRangeOffset = ($subHeaders[$k]['idRangeOffset'] + $j - $subHeaders[$k]['firstCode']);
    610. 

  610. 										$g = ($glyphIndexArray[$idRangeOffset] + $idDelta[$k]) % 65536;
    611. 

  611. 										if ($g < 0) {
    612. 

  612. 											$g = 0;
    613. 

  613. 										}
    614. 

  614. 										$ctg[$c] = $g;
    615. 

  615. 									}
    616. 

  616. 								}
    617. 

  617. 							}
    618. 

  618. 							break;
    619. 

  619. 						}
    620. 

  620. 						case 4: { // Format 4: Segment mapping to delta values
    621. 

  621. 							$length = TCPDF_STATIC::_getUSHORT($font, $offset);
    622. 

  622. 							$offset += 2;
    623. 

  623. 							$offset += 2; // skip version/language
    624. 

  624. 							$segCount = floor(TCPDF_STATIC::_getUSHORT($font, $offset) / 2);
    625. 

  625. 							$offset += 2;
    626. 

  626. 							$offset += 6; // skip searchRange, entrySelector, rangeShift
    627. 

  627. 							$endCount = array(); // array of end character codes for each segment
    628. 

  628. 							for ($k = 0; $k < $segCount; ++$k) {
    629. 

  629. 								$endCount[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    630. 

  630. 								$offset += 2;
    631. 

  631. 							}
    632. 

  632. 							$offset += 2; // skip reservedPad
    633. 

  633. 							$startCount = array(); // array of start character codes for each segment
    634. 

  634. 							for ($k = 0; $k < $segCount; ++$k) {
    635. 

  635. 								$startCount[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    636. 

  636. 								$offset += 2;
    637. 

  637. 							}
    638. 

  638. 							$idDelta = array(); // delta for all character codes in segment
    639. 

  639. 							for ($k = 0; $k < $segCount; ++$k) {
    640. 

  640. 								$idDelta[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    641. 

  641. 								$offset += 2;
    642. 

  642. 							}
    643. 

  643. 							$idRangeOffset = array(); // Offsets into glyphIdArray or 0
    644. 

  644. 							for ($k = 0; $k < $segCount; ++$k) {
    645. 

  645. 								$idRangeOffset[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    646. 

  646. 								$offset += 2;
    647. 

  647. 							}
    648. 

  648. 							$gidlen = (floor($length / 2) - 8 - (4 * $segCount));
    649. 

  649. 							$glyphIdArray = array(); // glyph index array
    650. 

  650. 							for ($k = 0; $k < $gidlen; ++$k) {
    651. 

  651. 								$glyphIdArray[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    652. 

  652. 								$offset += 2;
    653. 

  653. 							}
    654. 

  654. 							for ($k = 0; $k < $segCount; ++$k) {
    655. 

  655. 								for ($c = $startCount[$k]; $c <= $endCount[$k]; ++$c) {
    656. 

  656. 									if ($idRangeOffset[$k] == 0) {
    657. 

  657. 										$g = ($idDelta[$k] + $c) % 65536;
    658. 

  658. 									} else {
    659. 

  659. 										$gid = (floor($idRangeOffset[$k] / 2) + ($c - $startCount[$k]) - ($segCount - $k));
    660. 

  660. 										$g = ($glyphIdArray[$gid] + $idDelta[$k]) % 65536;
    661. 

  661. 									}
    662. 

  662. 									if ($g < 0) {
    663. 

  663. 										$g = 0;
    664. 

  664. 									}
    665. 

  665. 									$ctg[$c] = $g;
    666. 

  666. 								}
    667. 

  667. 							}
    668. 

  668. 							break;
    669. 

  669. 						}
    670. 

  670. 						case 6: { // Format 6: Trimmed table mapping
    671. 

  671. 							$offset += 4; // skip length and version/language
    672. 

  672. 							$firstCode = TCPDF_STATIC::_getUSHORT($font, $offset);
    673. 

  673. 							$offset += 2;
    674. 

  674. 							$entryCount = TCPDF_STATIC::_getUSHORT($font, $offset);
    675. 

  675. 							$offset += 2;
    676. 

  676. 							for ($k = 0; $k < $entryCount; ++$k) {
    677. 

  677. 								$c = ($k + $firstCode);
    678. 

  678. 								$g = TCPDF_STATIC::_getUSHORT($font, $offset);
    679. 

  679. 								$offset += 2;
    680. 

  680. 								$ctg[$c] = $g;
    681. 

  681. 							}
    682. 

  682. 							break;
    683. 

  683. 						}
    684. 

  684. 						case 8: { // Format 8: Mixed 16-bit and 32-bit coverage
    685. 

  685. 							$offset += 10; // skip reserved, length and version/language
    686. 

  686. 							for ($k = 0; $k < 8192; ++$k) {
    687. 

  687. 								$is32[$k] = TCPDF_STATIC::_getBYTE($font, $offset);
    688. 

  688. 								++$offset;
    689. 

  689. 							}
    690. 

  690. 							$nGroups = TCPDF_STATIC::_getULONG($font, $offset);
    691. 

  691. 							$offset += 4;
    692. 

  692. 							for ($i = 0; $i < $nGroups; ++$i) {
    693. 

  693. 								$startCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    694. 

  694. 								$offset += 4;
    695. 

  695. 								$endCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    696. 

  696. 								$offset += 4;
    697. 

  697. 								$startGlyphID = TCPDF_STATIC::_getULONG($font, $offset);
    698. 

  698. 								$offset += 4;
    699. 

  699. 								for ($k = $startCharCode; $k <= $endCharCode; ++$k) {
    700. 

  700. 									$is32idx = floor($c / 8);
    701. 

  701. 									if ((isset($is32[$is32idx])) AND (($is32[$is32idx] & (1 << (7 - ($c % 8)))) == 0)) {
    702. 

  702. 										$c = $k;
    703. 

  703. 									} else {
    704. 

  704. 										// 32 bit format
    705. 

  705. 										// convert to decimal (http://www.unicode.org/faq//utf_bom.html#utf16-4)
    706. 

  706. 										//LEAD_OFFSET = (0xD800 - (0x10000 >> 10)) = 55232
    707. 

  707. 										//SURROGATE_OFFSET = (0x10000 - (0xD800 << 10) - 0xDC00) = -56613888
    708. 

  708. 										$c = ((55232 + ($k >> 10)) << 10) + (0xDC00 + ($k & 0x3FF)) -56613888;
    709. 

  709. 									}
    710. 

  710. 									$ctg[$c] = 0;
    711. 

  711. 									++$startGlyphID;
    712. 

  712. 								}
    713. 

  713. 							}
    714. 

  714. 							break;
    715. 

  715. 						}
    716. 

  716. 						case 10: { // Format 10: Trimmed array
    717. 

  717. 							$offset += 10; // skip reserved, length and version/language
    718. 

  718. 							$startCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    719. 

  719. 							$offset += 4;
    720. 

  720. 							$numChars = TCPDF_STATIC::_getULONG($font, $offset);
    721. 

  721. 							$offset += 4;
    722. 

  722. 							for ($k = 0; $k < $numChars; ++$k) {
    723. 

  723. 								$c = ($k + $startCharCode);
    724. 

  724. 								$g = TCPDF_STATIC::_getUSHORT($font, $offset);
    725. 

  725. 								$ctg[$c] = $g;
    726. 

  726. 								$offset += 2;
    727. 

  727. 							}
    728. 

  728. 							break;
    729. 

  729. 						}
    730. 

  730. 						case 12: { // Format 12: Segmented coverage
    731. 

  731. 							$offset += 10; // skip length and version/language
    732. 

  732. 							$nGroups = TCPDF_STATIC::_getULONG($font, $offset);
    733. 

  733. 							$offset += 4;
    734. 

  734. 							for ($k = 0; $k < $nGroups; ++$k) {
    735. 

  735. 								$startCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    736. 

  736. 								$offset += 4;
    737. 

  737. 								$endCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    738. 

  738. 								$offset += 4;
    739. 

  739. 								$startGlyphCode = TCPDF_STATIC::_getULONG($font, $offset);
    740. 

  740. 								$offset += 4;
    741. 

  741. 								for ($c = $startCharCode; $c <= $endCharCode; ++$c) {
    742. 

  742. 									$ctg[$c] = $startGlyphCode;
    743. 

  743. 									++$startGlyphCode;
    744. 

  744. 								}
    745. 

  745. 							}
    746. 

  746. 							break;
    747. 

  747. 						}
    748. 

  748. 						case 13: { // Format 13: Many-to-one range mappings
    749. 

  749. 							// to be implemented ...
    750. 

  750. 							break;
    751. 

  751. 						}
    752. 

  752. 						case 14: { // Format 14: Unicode Variation Sequences
    753. 

  753. 							// to be implemented ...
    754. 

  754. 							break;
    755. 

  755. 						}
    756. 

  756. 					}
    757. 

  757. 				}
    758. 

  758. 			}
    759. 

  759. 			if (!isset($ctg[0])) {
    760. 

  760. 				$ctg[0] = 0;
    761. 

  761. 			}
    762. 

  762. 			// get xHeight (height of x)
    763. 

  763. 			$offset = ($table['glyf']['offset'] + $indexToLoc[$ctg[120]] + 4);
    764. 

  764. 			$yMin = TCPDF_STATIC::_getFWORD($font, $offset);
    765. 

  765. 			$offset += 4;
    766. 

  766. 			$yMax = TCPDF_STATIC::_getFWORD($font, $offset);
    767. 

  767. 			$offset += 2;
    768. 

  768. 			$fmetric['XHeight'] = round(($yMax - $yMin) * $urk);
    769. 

  769. 			// get CapHeight (height of H)
    770. 

  770. 			$offset = ($table['glyf']['offset'] + $indexToLoc[$ctg[72]] + 4);
    771. 

  771. 			$yMin = TCPDF_STATIC::_getFWORD($font, $offset);
    772. 

  772. 			$offset += 4;
    773. 

  773. 			$yMax = TCPDF_STATIC::_getFWORD($font, $offset);
    774. 

  774. 			$offset += 2;
    775. 

  775. 			$fmetric['CapHeight'] = round(($yMax - $yMin) * $urk);
    776. 

  776. 			// ceate widths array
    777. 

  777. 			$cw = array();
    778. 

  778. 			$offset = $table['hmtx']['offset'];
    779. 

  779. 			for ($i = 0 ; $i < $numberOfHMetrics; ++$i) {
    780. 

  780. 				$cw[$i] = round(TCPDF_STATIC::_getUFWORD($font, $offset) * $urk);
    781. 

  781. 				$offset += 4; // skip lsb
    782. 

  782. 			}
    783. 

  783. 			if ($numberOfHMetrics < $numGlyphs) {
    784. 

  784. 				// fill missing widths with the last value
    785. 

  785. 				$cw = array_pad($cw, $numGlyphs, $cw[($numberOfHMetrics - 1)]);
    786. 

  786. 			}
    787. 

  787. 			$fmetric['MissingWidth'] = $cw[0];
    788. 

  788. 			$fmetric['cw'] = '';
    789. 

  789. 			for ($cid = 0; $cid <= 65535; ++$cid) {
    790. 

  790. 				if (isset($ctg[$cid])) {
    791. 

  791. 					if (isset($cw[$ctg[$cid]])) {
    792. 

  792. 						$fmetric['cw'] .= ','.$cid.'=>'.$cw[$ctg[$cid]];
    793. 

  793. 					}
    794. 

  794. 					if ($addcbbox AND isset($indexToLoc[$ctg[$cid]])) {
    795. 

  795. 						$offset = ($table['glyf']['offset'] + $indexToLoc[$ctg[$cid]]);
    796. 

  796. 						$xMin = round(TCPDF_STATIC::_getFWORD($font, $offset + 2)) * $urk;
    797. 

  797. 						$yMin = round(TCPDF_STATIC::_getFWORD($font, $offset + 4)) * $urk;
    798. 

  798. 						$xMax = round(TCPDF_STATIC::_getFWORD($font, $offset + 6)) * $urk;
    799. 

  799. 						$yMax = round(TCPDF_STATIC::_getFWORD($font, $offset + 8)) * $urk;
    800. 

  800. 						$fmetric['cbbox'] .= ','.$cid.'=>array('.$xMin.','.$yMin.','.$xMax.','.$yMax.')';
    801. 

  801. 					}
    802. 

  802. 				}
    803. 

  803. 			}
    804. 

  804. 		} // end of true type
    805. 

  805. 		if (($fmetric['type'] == 'TrueTypeUnicode') AND (count($ctg) == 256)) {
    806. 

  806. 			$fmetric['type'] == 'TrueType';
    807. 

  807. 		}
    808. 

  808. 		// ---------- create php font file ----------
    809. 

  809. 		$pfile = '<'.'?'.'php'."\n";
    810. 

  810. 		$pfile .= '// TCPDF FONT FILE DESCRIPTION'."\n";
    811. 

  811. 		$pfile .= '$type=\''.$fmetric['type'].'\';'."\n";
    812. 

  812. 		$pfile .= '$name=\''.$fmetric['name'].'\';'."\n";
    813. 

  813. 		$pfile .= '$up='.$fmetric['underlinePosition'].';'."\n";
    814. 

  814. 		$pfile .= '$ut='.$fmetric['underlineThickness'].';'."\n";
    815. 

  815. 		if ($fmetric['MissingWidth'] > 0) {
    816. 

  816. 			$pfile .= '$dw='.$fmetric['MissingWidth'].';'."\n";
    817. 

  817. 		} else {
    818. 

  818. 			$pfile .= '$dw='.$fmetric['AvgWidth'].';'."\n";
    819. 

  819. 		}
    820. 

  820. 		$pfile .= '$diff=\''.$fmetric['diff'].'\';'."\n";
    821. 

  821. 		if ($fmetric['type'] == 'Type1') {
    822. 

  822. 			// Type 1
    823. 

  823. 			$pfile .= '$enc=\''.$fmetric['enc'].'\';'."\n";
    824. 

  824. 			$pfile .= '$file=\''.$fmetric['file'].'\';'."\n";
    825. 

  825. 			$pfile .= '$size1='.$fmetric['size1'].';'."\n";
    826. 

  826. 			$pfile .= '$size2='.$fmetric['size2'].';'."\n";
    827. 

  827. 		} else {
    828. 

  828. 			$pfile .= '$originalsize='.$fmetric['originalsize'].';'."\n";
    829. 

  829. 			if ($fmetric['type'] == 'cidfont0') {
    830. 

  830. 				// CID-0
    831. 

  831. 				switch ($fonttype) {
    832. 

  832. 					case 'CID0JP': {
    833. 

  833. 						$pfile .= '// Japanese'."\n";
    834. 

  834. 						$pfile .= '$enc=\'UniJIS-UTF16-H\';'."\n";
    835. 

  835. 						$pfile .= '$cidinfo=array(\'Registry\'=>\'Adobe\', \'Ordering\'=>\'Japan1\',\'Supplement\'=>5);'."\n";
    836. 

  836. 						$pfile .= 'include(dirname(__FILE__).\'/uni2cid_aj16.php\');'."\n";
    837. 

  837. 						break;
    838. 

  838. 					}
    839. 

  839. 					case 'CID0KR': {
    840. 

  840. 						$pfile .= '// Korean'."\n";
    841. 

  841. 						$pfile .= '$enc=\'UniKS-UTF16-H\';'."\n";
    842. 

  842. 						$pfile .= '$cidinfo=array(\'Registry\'=>\'Adobe\', \'Ordering\'=>\'Korea1\',\'Supplement\'=>0);'."\n";
    843. 

  843. 						$pfile .= 'include(dirname(__FILE__).\'/uni2cid_ak12.php\');'."\n";
    844. 

  844. 						break;
    845. 

  845. 					}
    846. 

  846. 					case 'CID0CS': {
    847. 

  847. 						$pfile .= '// Chinese Simplified'."\n";
    848. 

  848. 						$pfile .= '$enc=\'UniGB-UTF16-H\';'."\n";
    849. 

  849. 						$pfile .= '$cidinfo=array(\'Registry\'=>\'Adobe\', \'Ordering\'=>\'GB1\',\'Supplement\'=>2);'."\n";
    850. 

  850. 						$pfile .= 'include(dirname(__FILE__).\'/uni2cid_ag15.php\');'."\n";
    851. 

  851. 						break;
    852. 

  852. 					}
    853. 

  853. 					case 'CID0CT':
    854. 

  854. 					default: {
    855. 

  855. 						$pfile .= '// Chinese Traditional'."\n";
    856. 

  856. 						$pfile .= '$enc=\'UniCNS-UTF16-H\';'."\n";
    857. 

  857. 						$pfile .= '$cidinfo=array(\'Registry\'=>\'Adobe\', \'Ordering\'=>\'CNS1\',\'Supplement\'=>0);'."\n";
    858. 

  858. 						$pfile .= 'include(dirname(__FILE__).\'/uni2cid_aj16.php\');'."\n";
    859. 

  859. 						break;
    860. 

  860. 					}
    861. 

  861. 				}
    862. 

  862. 			} else {
    863. 

  863. 				// TrueType
    864. 

  864. 				$pfile .= '$enc=\''.$fmetric['enc'].'\';'."\n";
    865. 

  865. 				$pfile .= '$file=\''.$fmetric['file'].'\';'."\n";
    866. 

  866. 				$pfile .= '$ctg=\''.$fmetric['ctg'].'\';'."\n";
    867. 

  867. 				// create CIDToGIDMap
    868. 

  868. 				$cidtogidmap = str_pad('', 131072, "\x00"); // (256 * 256 * 2) = 131072
    869. 

  869. 				foreach ($ctg as $cid => $gid) {
    870. 

  870. 					$cidtogidmap = self::updateCIDtoGIDmap($cidtogidmap, $cid, $ctg[$cid]);
    871. 

  871. 				}
    872. 

  872. 				// store compressed CIDToGIDMap
    873. 

  873. 				$fp = fopen($outpath.$fmetric['ctg'], 'wb');
    874. 

  874. 				fwrite($fp, gzcompress($cidtogidmap));
    875. 

  875. 				fclose($fp);
    876. 

  876. 			}
    877. 

  877. 		}
    878. 

  878. 		$pfile .= '$desc=array(';
    879. 

  879. 		$pfile .= '\'Flags\'=>'.$fmetric['Flags'].',';
    880. 

  880. 		$pfile .= '\'FontBBox\'=>\'['.$fmetric['bbox'].']\',';
    881. 

  881. 		$pfile .= '\'ItalicAngle\'=>'.$fmetric['italicAngle'].',';
    882. 

  882. 		$pfile .= '\'Ascent\'=>'.$fmetric['Ascent'].',';
    883. 

  883. 		$pfile .= '\'Descent\'=>'.$fmetric['Descent'].',';
    884. 

  884. 		$pfile .= '\'Leading\'=>'.$fmetric['Leading'].',';
    885. 

  885. 		$pfile .= '\'CapHeight\'=>'.$fmetric['CapHeight'].',';
    886. 

  886. 		$pfile .= '\'XHeight\'=>'.$fmetric['XHeight'].',';
    887. 

  887. 		$pfile .= '\'StemV\'=>'.$fmetric['StemV'].',';
    888. 

  888. 		$pfile .= '\'StemH\'=>'.$fmetric['StemH'].',';
    889. 

  889. 		$pfile .= '\'AvgWidth\'=>'.$fmetric['AvgWidth'].',';
    890. 

  890. 		$pfile .= '\'MaxWidth\'=>'.$fmetric['MaxWidth'].',';
    891. 

  891. 		$pfile .= '\'MissingWidth\'=>'.$fmetric['MissingWidth'].'';
    892. 

  892. 		$pfile .= ');'."\n";
    893. 

  893. 		if (isset($fmetric['cbbox'])) {
    894. 

  894. 			$pfile .= '$cbbox=array('.substr($fmetric['cbbox'], 1).');'."\n";
    895. 

  895. 		}
    896. 

  896. 		$pfile .= '$cw=array('.substr($fmetric['cw'], 1).');'."\n";
    897. 

  897. 		$pfile .= '// --- EOF ---'."\n";
    898. 

  898. 		// store file
    899. 

  899. 		$fp = fopen($outpath.$font_name.'.php', 'w');
    900. 

  900. 		fwrite($fp, $pfile);
    901. 

  901. 		fclose($fp);
    902. 

  902. 		// return TCPDF font name
    903. 

  903. 		return $font_name;
    904. 

  904. 	}
    905. 

  905. 

  906. 	/**
    907. 

  907. 	 * Returs the checksum of a TTF table.
    908. 

  908. 	 * @param $table (string) table to check
    909. 

  909. 	 * @param $length (int) length of table in bytes
    910. 

  910. 	 * @return int checksum
    911. 

  911. 	 * @author Nicola Asuni
    912. 

  912. 	 * @since 5.2.000 (2010-06-02)
    913. 

  913. 	 * @public static
    914. 

  914. 	 */
    915. 

  915. 	public static function _getTTFtableChecksum($table, $length) {
    916. 

  916. 		$sum = 0;
    917. 

  917. 		$tlen = ($length / 4);
    918. 

  918. 		$offset = 0;
    919. 

  919. 		for ($i = 0; $i < $tlen; ++$i) {
    920. 

  920. 			$v = unpack('Ni', substr($table, $offset, 4));
    921. 

  921. 			$sum += $v['i'];
    922. 

  922. 			$offset += 4;
    923. 

  923. 		}
    924. 

  924. 		$sum = unpack('Ni', pack('N', $sum));
    925. 

  925. 		return $sum['i'];
    926. 

  926. 	}
    927. 

  927. 

  928. 	/**
    929. 

  929. 	 * Returns a subset of the TrueType font data without the unused glyphs.
    930. 

  930. 	 * @param $font (string) TrueType font data.
    931. 

  931. 	 * @param $subsetchars (array) Array of used characters (the glyphs to keep).
    932. 

  932. 	 * @return (string) A subset of TrueType font data without the unused glyphs.
    933. 

  933. 	 * @author Nicola Asuni
    934. 

  934. 	 * @since 5.2.000 (2010-06-02)
    935. 

  935. 	 * @public static
    936. 

  936. 	 */
    937. 

  937. 	public static function _getTrueTypeFontSubset($font, $subsetchars) {
    938. 

  938. 		ksort($subsetchars);
    939. 

  939. 		$offset = 0; // offset position of the font data
    940. 

  940. 		if (TCPDF_STATIC::_getULONG($font, $offset) != 0x10000) {
    941. 

  941. 			// sfnt version must be 0x00010000 for TrueType version 1.0.
    942. 

  942. 			return $font;
    943. 

  943. 		}
    944. 

  944. 		$offset += 4;
    945. 

  945. 		// get number of tables
    946. 

  946. 		$numTables = TCPDF_STATIC::_getUSHORT($font, $offset);
    947. 

  947. 		$offset += 2;
    948. 

  948. 		// skip searchRange, entrySelector and rangeShift
    949. 

  949. 		$offset += 6;
    950. 

  950. 		// tables array
    951. 

  951. 		$table = array();
    952. 

  952. 		// for each table
    953. 

  953. 		for ($i = 0; $i < $numTables; ++$i) {
    954. 

  954. 			// get table info
    955. 

  955. 			$tag = substr($font, $offset, 4);
    956. 

  956. 			$offset += 4;
    957. 

  957. 			$table[$tag] = array();
    958. 

  958. 			$table[$tag]['checkSum'] = TCPDF_STATIC::_getULONG($font, $offset);
    959. 

  959. 			$offset += 4;
    960. 

  960. 			$table[$tag]['offset'] = TCPDF_STATIC::_getULONG($font, $offset);
    961. 

  961. 			$offset += 4;
    962. 

  962. 			$table[$tag]['length'] = TCPDF_STATIC::_getULONG($font, $offset);
    963. 

  963. 			$offset += 4;
    964. 

  964. 		}
    965. 

  965. 		// check magicNumber
    966. 

  966. 		$offset = $table['head']['offset'] + 12;
    967. 

  967. 		if (TCPDF_STATIC::_getULONG($font, $offset) != 0x5F0F3CF5) {
    968. 

  968. 			// magicNumber must be 0x5F0F3CF5
    969. 

  969. 			return $font;
    970. 

  970. 		}
    971. 

  971. 		$offset += 4;
    972. 

  972. 		// get offset mode (indexToLocFormat : 0 = short, 1 = long)
    973. 

  973. 		$offset = $table['head']['offset'] + 50;
    974. 

  974. 		$short_offset = (TCPDF_STATIC::_getSHORT($font, $offset) == 0);
    975. 

  975. 		$offset += 2;
    976. 

  976. 		// get the offsets to the locations of the glyphs in the font, relative to the beginning of the glyphData table
    977. 

  977. 		$indexToLoc = array();
    978. 

  978. 		$offset = $table['loca']['offset'];
    979. 

  979. 		if ($short_offset) {
    980. 

  980. 			// short version
    981. 

  981. 			$tot_num_glyphs = floor($table['loca']['length'] / 2); // numGlyphs + 1
    982. 

  982. 			for ($i = 0; $i < $tot_num_glyphs; ++$i) {
    983. 

  983. 				$indexToLoc[$i] = TCPDF_STATIC::_getUSHORT($font, $offset) * 2;
    984. 

  984. 				$offset += 2;
    985. 

  985. 			}
    986. 

  986. 		} else {
    987. 

  987. 			// long version
    988. 

  988. 			$tot_num_glyphs = ($table['loca']['length'] / 4); // numGlyphs + 1
    989. 

  989. 			for ($i = 0; $i < $tot_num_glyphs; ++$i) {
    990. 

  990. 				$indexToLoc[$i] = TCPDF_STATIC::_getULONG($font, $offset);
    991. 

  991. 				$offset += 4;
    992. 

  992. 			}
    993. 

  993. 		}
    994. 

  994. 		// get glyphs indexes of chars from cmap table
    995. 

  995. 		$subsetglyphs = array(); // glyph IDs on key
    996. 

  996. 		$subsetglyphs[0] = true; // character codes that do not correspond to any glyph in the font should be mapped to glyph index 0
    997. 

  997. 		$offset = $table['cmap']['offset'] + 2;
    998. 

  998. 		$numEncodingTables = TCPDF_STATIC::_getUSHORT($font, $offset);
    999. 

  999. 		$offset += 2;
    1000. 

  1000. 		$encodingTables = array();
    1001. 

  1001. 		for ($i = 0; $i < $numEncodingTables; ++$i) {
    1002. 

  1002. 			$encodingTables[$i]['platformID'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1003. 

  1003. 			$offset += 2;
    1004. 

  1004. 			$encodingTables[$i]['encodingID'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1005. 

  1005. 			$offset += 2;
    1006. 

  1006. 			$encodingTables[$i]['offset'] = TCPDF_STATIC::_getULONG($font, $offset);
    1007. 

  1007. 			$offset += 4;
    1008. 

  1008. 		}
    1009. 

  1009. 		foreach ($encodingTables as $enctable) {
    1010. 

  1010. 			// get all platforms and encodings
    1011. 

  1011. 			$offset = $table['cmap']['offset'] + $enctable['offset'];
    1012. 

  1012. 			$format = TCPDF_STATIC::_getUSHORT($font, $offset);
    1013. 

  1013. 			$offset += 2;
    1014. 

  1014. 			switch ($format) {
    1015. 

  1015. 				case 0: { // Format 0: Byte encoding table
    1016. 

  1016. 					$offset += 4; // skip length and version/language
    1017. 

  1017. 					for ($c = 0; $c < 256; ++$c) {
    1018. 

  1018. 						if (isset($subsetchars[$c])) {
    1019. 

  1019. 							$g = TCPDF_STATIC::_getBYTE($font, $offset);
    1020. 

  1020. 							$subsetglyphs[$g] = true;
    1021. 

  1021. 						}
    1022. 

  1022. 						++$offset;
    1023. 

  1023. 					}
    1024. 

  1024. 					break;
    1025. 

  1025. 				}
    1026. 

  1026. 				case 2: { // Format 2: High-byte mapping through table
    1027. 

  1027. 					$offset += 4; // skip length and version/language
    1028. 

  1028. 					$numSubHeaders = 0;
    1029. 

  1029. 					for ($i = 0; $i < 256; ++$i) {
    1030. 

  1030. 						// Array that maps high bytes to subHeaders: value is subHeader index * 8.
    1031. 

  1031. 						$subHeaderKeys[$i] = (TCPDF_STATIC::_getUSHORT($font, $offset) / 8);
    1032. 

  1032. 						$offset += 2;
    1033. 

  1033. 						if ($numSubHeaders < $subHeaderKeys[$i]) {
    1034. 

  1034. 							$numSubHeaders = $subHeaderKeys[$i];
    1035. 

  1035. 						}
    1036. 

  1036. 					}
    1037. 

  1037. 					// the number of subHeaders is equal to the max of subHeaderKeys + 1
    1038. 

  1038. 					++$numSubHeaders;
    1039. 

  1039. 					// read subHeader structures
    1040. 

  1040. 					$subHeaders = array();
    1041. 

  1041. 					$numGlyphIndexArray = 0;
    1042. 

  1042. 					for ($k = 0; $k < $numSubHeaders; ++$k) {
    1043. 

  1043. 						$subHeaders[$k]['firstCode'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1044. 

  1044. 						$offset += 2;
    1045. 

  1045. 						$subHeaders[$k]['entryCount'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1046. 

  1046. 						$offset += 2;
    1047. 

  1047. 						$subHeaders[$k]['idDelta'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1048. 

  1048. 						$offset += 2;
    1049. 

  1049. 						$subHeaders[$k]['idRangeOffset'] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1050. 

  1050. 						$offset += 2;
    1051. 

  1051. 						$subHeaders[$k]['idRangeOffset'] -= (2 + (($numSubHeaders - $k - 1) * 8));
    1052. 

  1052. 						$subHeaders[$k]['idRangeOffset'] /= 2;
    1053. 

  1053. 						$numGlyphIndexArray += $subHeaders[$k]['entryCount'];
    1054. 

  1054. 					}
    1055. 

  1055. 					for ($k = 0; $k < $numGlyphIndexArray; ++$k) {
    1056. 

  1056. 						$glyphIndexArray[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1057. 

  1057. 						$offset += 2;
    1058. 

  1058. 					}
    1059. 

  1059. 					for ($i = 0; $i < 256; ++$i) {
    1060. 

  1060. 						$k = $subHeaderKeys[$i];
    1061. 

  1061. 						if ($k == 0) {
    1062. 

  1062. 							// one byte code
    1063. 

  1063. 							$c = $i;
    1064. 

  1064. 							if (isset($subsetchars[$c])) {
    1065. 

  1065. 								$g = $glyphIndexArray[0];
    1066. 

  1066. 								$subsetglyphs[$g] = true;
    1067. 

  1067. 							}
    1068. 

  1068. 						} else {
    1069. 

  1069. 							// two bytes code
    1070. 

  1070. 							$start_byte = $subHeaders[$k]['firstCode'];
    1071. 

  1071. 							$end_byte = $start_byte + $subHeaders[$k]['entryCount'];
    1072. 

  1072. 							for ($j = $start_byte; $j < $end_byte; ++$j) {
    1073. 

  1073. 								// combine high and low bytes
    1074. 

  1074. 								$c = (($i << 8) + $j);
    1075. 

  1075. 								if (isset($subsetchars[$c])) {
    1076. 

  1076. 									$idRangeOffset = ($subHeaders[$k]['idRangeOffset'] + $j - $subHeaders[$k]['firstCode']);
    1077. 

  1077. 									$g = ($glyphIndexArray[$idRangeOffset] + $idDelta[$k]) % 65536;
    1078. 

  1078. 									if ($g < 0) {
    1079. 

  1079. 										$g = 0;
    1080. 

  1080. 									}
    1081. 

  1081. 									$subsetglyphs[$g] = true;
    1082. 

  1082. 								}
    1083. 

  1083. 							}
    1084. 

  1084. 						}
    1085. 

  1085. 					}
    1086. 

  1086. 					break;
    1087. 

  1087. 				}
    1088. 

  1088. 				case 4: { // Format 4: Segment mapping to delta values
    1089. 

  1089. 					$length = TCPDF_STATIC::_getUSHORT($font, $offset);
    1090. 

  1090. 					$offset += 2;
    1091. 

  1091. 					$offset += 2; // skip version/language
    1092. 

  1092. 					$segCount = floor(TCPDF_STATIC::_getUSHORT($font, $offset) / 2);
    1093. 

  1093. 					$offset += 2;
    1094. 

  1094. 					$offset += 6; // skip searchRange, entrySelector, rangeShift
    1095. 

  1095. 					$endCount = array(); // array of end character codes for each segment
    1096. 

  1096. 					for ($k = 0; $k < $segCount; ++$k) {
    1097. 

  1097. 						$endCount[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1098. 

  1098. 						$offset += 2;
    1099. 

  1099. 					}
    1100. 

  1100. 					$offset += 2; // skip reservedPad
    1101. 

  1101. 					$startCount = array(); // array of start character codes for each segment
    1102. 

  1102. 					for ($k = 0; $k < $segCount; ++$k) {
    1103. 

  1103. 						$startCount[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1104. 

  1104. 						$offset += 2;
    1105. 

  1105. 					}
    1106. 

  1106. 					$idDelta = array(); // delta for all character codes in segment
    1107. 

  1107. 					for ($k = 0; $k < $segCount; ++$k) {
    1108. 

  1108. 						$idDelta[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1109. 

  1109. 						$offset += 2;
    1110. 

  1110. 					}
    1111. 

  1111. 					$idRangeOffset = array(); // Offsets into glyphIdArray or 0
    1112. 

  1112. 					for ($k = 0; $k < $segCount; ++$k) {
    1113. 

  1113. 						$idRangeOffset[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1114. 

  1114. 						$offset += 2;
    1115. 

  1115. 					}
    1116. 

  1116. 					$gidlen = (floor($length / 2) - 8 - (4 * $segCount));
    1117. 

  1117. 					$glyphIdArray = array(); // glyph index array
    1118. 

  1118. 					for ($k = 0; $k < $gidlen; ++$k) {
    1119. 

  1119. 						$glyphIdArray[$k] = TCPDF_STATIC::_getUSHORT($font, $offset);
    1120. 

  1120. 						$offset += 2;
    1121. 

  1121. 					}
    1122. 

  1122. 					for ($k = 0; $k < $segCount; ++$k) {
    1123. 

  1123. 						for ($c = $startCount[$k]; $c <= $endCount[$k]; ++$c) {
    1124. 

  1124. 							if (isset($subsetchars[$c])) {
    1125. 

  1125. 								if ($idRangeOffset[$k] == 0) {
    1126. 

  1126. 									$g = ($idDelta[$k] + $c) % 65536;
    1127. 

  1127. 								} else {
    1128. 

  1128. 									$gid = (floor($idRangeOffset[$k] / 2) + ($c - $startCount[$k]) - ($segCount - $k));
    1129. 

  1129. 									$g = ($glyphIdArray[$gid] + $idDelta[$k]) % 65536;
    1130. 

  1130. 								}
    1131. 

  1131. 								if ($g < 0) {
    1132. 

  1132. 									$g = 0;
    1133. 

  1133. 								}
    1134. 

  1134. 								$subsetglyphs[$g] = true;
    1135. 

  1135. 							}
    1136. 

  1136. 						}
    1137. 

  1137. 					}
    1138. 

  1138. 					break;
    1139. 

  1139. 				}
    1140. 

  1140. 				case 6: { // Format 6: Trimmed table mapping
    1141. 

  1141. 					$offset += 4; // skip length and version/language
    1142. 

  1142. 					$firstCode = TCPDF_STATIC::_getUSHORT($font, $offset);
    1143. 

  1143. 					$offset += 2;
    1144. 

  1144. 					$entryCount = TCPDF_STATIC::_getUSHORT($font, $offset);
    1145. 

  1145. 					$offset += 2;
    1146. 

  1146. 					for ($k = 0; $k < $entryCount; ++$k) {
    1147. 

  1147. 						$c = ($k + $firstCode);
    1148. 

  1148. 						if (isset($subsetchars[$c])) {
    1149. 

  1149. 							$g = TCPDF_STATIC::_getUSHORT($font, $offset);
    1150. 

  1150. 							$subsetglyphs[$g] = true;
    1151. 

  1151. 						}
    1152. 

  1152. 						$offset += 2;
    1153. 

  1153. 					}
    1154. 

  1154. 					break;
    1155. 

  1155. 				}
    1156. 

  1156. 				case 8: { // Format 8: Mixed 16-bit and 32-bit coverage
    1157. 

  1157. 					$offset += 10; // skip reserved, length and version/language
    1158. 

  1158. 					for ($k = 0; $k < 8192; ++$k) {
    1159. 

  1159. 						$is32[$k] = TCPDF_STATIC::_getBYTE($font, $offset);
    1160. 

  1160. 						++$offset;
    1161. 

  1161. 					}
    1162. 

  1162. 					$nGroups = TCPDF_STATIC::_getULONG($font, $offset);
    1163. 

  1163. 					$offset += 4;
    1164. 

  1164. 					for ($i = 0; $i < $nGroups; ++$i) {
    1165. 

  1165. 						$startCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    1166. 

  1166. 						$offset += 4;
    1167. 

  1167. 						$endCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    1168. 

  1168. 						$offset += 4;
    1169. 

  1169. 						$startGlyphID = TCPDF_STATIC::_getULONG($font, $offset);
    1170. 

  1170. 						$offset += 4;
    1171. 

  1171. 						for ($k = $startCharCode; $k <= $endCharCode; ++$k) {
    1172. 

  1172. 							$is32idx = floor($c / 8);
    1173. 

  1173. 							if ((isset($is32[$is32idx])) AND (($is32[$is32idx] & (1 << (7 - ($c % 8)))) == 0)) {
    1174. 

  1174. 								$c = $k;
    1175. 

  1175. 							} else {
    1176. 

  1176. 								// 32 bit format
    1177. 

  1177. 								// convert to decimal (http://www.unicode.org/faq//utf_bom.html#utf16-4)
    1178. 

  1178. 								//LEAD_OFFSET = (0xD800 - (0x10000 >> 10)) = 55232
    1179. 

  1179. 								//SURROGATE_OFFSET = (0x10000 - (0xD800 << 10) - 0xDC00) = -56613888
    1180. 

  1180. 								$c = ((55232 + ($k >> 10)) << 10) + (0xDC00 + ($k & 0x3FF)) -56613888;
    1181. 

  1181. 							}
    1182. 

  1182. 							if (isset($subsetchars[$c])) {
    1183. 

  1183. 								$subsetglyphs[$startGlyphID] = true;
    1184. 

  1184. 							}
    1185. 

  1185. 							++$startGlyphID;
    1186. 

  1186. 						}
    1187. 

  1187. 					}
    1188. 

  1188. 					break;
    1189. 

  1189. 				}
    1190. 

  1190. 				case 10: { // Format 10: Trimmed array
    1191. 

  1191. 					$offset += 10; // skip reserved, length and version/language
    1192. 

  1192. 					$startCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    1193. 

  1193. 					$offset += 4;
    1194. 

  1194. 					$numChars = TCPDF_STATIC::_getULONG($font, $offset);
    1195. 

  1195. 					$offset += 4;
    1196. 

  1196. 					for ($k = 0; $k < $numChars; ++$k) {
    1197. 

  1197. 						$c = ($k + $startCharCode);
    1198. 

  1198. 						if (isset($subsetchars[$c])) {
    1199. 

  1199. 							$g = TCPDF_STATIC::_getUSHORT($font, $offset);
    1200. 

  1200. 							$subsetglyphs[$g] = true;
    1201. 

  1201. 						}
    1202. 

  1202. 						$offset += 2;
    1203. 

  1203. 					}
    1204. 

  1204. 					break;
    1205. 

  1205. 				}
    1206. 

  1206. 				case 12: { // Format 12: Segmented coverage
    1207. 

  1207. 					$offset += 10; // skip length and version/language
    1208. 

  1208. 					$nGroups = TCPDF_STATIC::_getULONG($font, $offset);
    1209. 

  1209. 					$offset += 4;
    1210. 

  1210. 					for ($k = 0; $k < $nGroups; ++$k) {
    1211. 

  1211. 						$startCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    1212. 

  1212. 						$offset += 4;
    1213. 

  1213. 						$endCharCode = TCPDF_STATIC::_getULONG($font, $offset);
    1214. 

  1214. 						$offset += 4;
    1215. 

  1215. 						$startGlyphCode = TCPDF_STATIC::_getULONG($font, $offset);
    1216. 

  1216. 						$offset += 4;
    1217. 

  1217. 						for ($c = $startCharCode; $c <= $endCharCode; ++$c) {
    1218. 

  1218. 							if (isset($subsetchars[$c])) {
    1219. 

  1219. 								$subsetglyphs[$startGlyphCode] = true;
    1220. 

  1220. 							}
    1221. 

  1221. 							++$startGlyphCode;
    1222. 

  1222. 						}
    1223. 

  1223. 					}
    1224. 

  1224. 					break;
    1225. 

  1225. 				}
    1226. 

  1226. 				case 13: { // Format 13: Many-to-one range mappings
    1227. 

  1227. 					// to be implemented ...
    1228. 

  1228. 					break;
    1229. 

  1229. 				}
    1230. 

  1230. 				case 14: { // Format 14: Unicode Variation Sequences
    1231. 

  1231. 					// to be implemented ...
    1232. 

  1232. 					break;
    1233. 

  1233. 				}
    1234. 

  1234. 			}
    1235. 

  1235. 		}
    1236. 

  1236. 		// include all parts of composite glyphs
    1237. 

  1237. 		$new_sga = $subsetglyphs;
    1238. 

  1238. 		while (!empty($new_sga)) {
    1239. 

  1239. 			$sga = $new_sga;
    1240. 

  1240. 			$new_sga = array();
    1241. 

  1241. 			foreach ($sga as $key => $val) {
    1242. 

  1242. 				if (isset($indexToLoc[$key])) {
    1243. 

  1243. 					$offset = ($table['glyf']['offset'] + $indexToLoc[$key]);
    1244. 

  1244. 					$numberOfContours = TCPDF_STATIC::_getSHORT($font, $offset);
    1245. 

  1245. 					$offset += 2;
    1246. 

  1246. 					if ($numberOfContours < 0) { // composite glyph
    1247. 

  1247. 						$offset += 8; // skip xMin, yMin, xMax, yMax
    1248. 

  1248. 						do {
    1249. 

  1249. 							$flags = TCPDF_STATIC::_getUSHORT($font, $offset);
    1250. 

  1250. 							$offset += 2;
    1251. 

  1251. 							$glyphIndex = TCPDF_STATIC::_getUSHORT($font, $offset);
    1252. 

  1252. 							$offset += 2;
    1253. 

  1253. 							if (!isset($subsetglyphs[$glyphIndex])) {
    1254. 

  1254. 								// add missing glyphs
    1255. 

  1255. 								$new_sga[$glyphIndex] = true;
    1256. 

  1256. 							}
    1257. 

  1257. 							// skip some bytes by case
    1258. 

  1258. 							if ($flags & 1) {
    1259. 

  1259. 								$offset += 4;
    1260. 

  1260. 							} else {
    1261. 

  1261. 								$offset += 2;
    1262. 

  1262. 							}
    1263. 

  1263. 							if ($flags & 8) {
    1264. 

  1264. 								$offset += 2;
    1265. 

  1265. 							} elseif ($flags & 64) {
    1266. 

  1266. 								$offset += 4;
    1267. 

  1267. 							} elseif ($flags & 128) {
    1268. 

  1268. 								$offset += 8;
    1269. 

  1269. 							}
    1270. 

  1270. 						} while ($flags & 32);
    1271. 

  1271. 					}
    1272. 

  1272. 				}
    1273. 

  1273. 			}
    1274. 

  1274. 			$subsetglyphs += $new_sga;
    1275. 

  1275. 		}
    1276. 

  1276. 		// sort glyphs by key (and remove duplicates)
    1277. 

  1277. 		ksort($subsetglyphs);
    1278. 

  1278. 		// build new glyf and loca tables
    1279. 

  1279. 		$glyf = '';
    1280. 

  1280. 		$loca = '';
    1281. 

  1281. 		$offset = 0;
    1282. 

  1282. 		$glyf_offset = $table['glyf']['offset'];
    1283. 

  1283. 		for ($i = 0; $i < $tot_num_glyphs; ++$i) {
    1284. 

  1284. 			if (isset($subsetglyphs[$i])) {
    1285. 

  1285. 				$length = ($indexToLoc[($i + 1)] - $indexToLoc[$i]);
    1286. 

  1286. 				$glyf .= substr($font, ($glyf_offset + $indexToLoc[$i]), $length);
    1287. 

  1287. 			} else {
    1288. 

  1288. 				$length = 0;
    1289. 

  1289. 			}
    1290. 

  1290. 			if ($short_offset) {
    1291. 

  1291. 				$loca .= pack('n', floor($offset / 2));
    1292. 

  1292. 			} else {
    1293. 

  1293. 				$loca .= pack('N', $offset);
    1294. 

  1294. 			}
    1295. 

  1295. 			$offset += $length;
    1296. 

  1296. 		}
    1297. 

  1297. 		// array of table names to preserve (loca and glyf tables will be added later)
    1298. 

  1298. 		// the cmap table is not needed and shall not be present, since the mapping from character codes to glyph descriptions is provided separately
    1299. 

  1299. 		$table_names = array ('head', 'hhea', 'hmtx', 'maxp', 'cvt ', 'fpgm', 'prep'); // minimum required table names
    1300. 

  1300. 		// get the tables to preserve
    1301. 

  1301. 		$offset = 12;
    1302. 

  1302. 		foreach ($table as $tag => $val) {
    1303. 

  1303. 			if (in_array($tag, $table_names)) {
    1304. 

  1304. 				$table[$tag]['data'] = substr($font, $table[$tag]['offset'], $table[$tag]['length']);
    1305. 

  1305. 				if ($tag == 'head') {
    1306. 

  1306. 					// set the checkSumAdjustment to 0
    1307. 

  1307. 					$table[$tag]['data'] = substr($table[$tag]['data'], 0, 8)."\x0\x0\x0\x0".substr($table[$tag]['data'], 12);
    1308. 

  1308. 				}
    1309. 

  1309. 				$pad = 4 - ($table[$tag]['length'] % 4);
    1310. 

  1310. 				if ($pad != 4) {
    1311. 

  1311. 					// the length of a table must be a multiple of four bytes
    1312. 

  1312. 					$table[$tag]['length'] += $pad;
    1313. 

  1313. 					$table[$tag]['data'] .= str_repeat("\x0", $pad);
    1314. 

  1314. 				}
    1315. 

  1315. 				$table[$tag]['offset'] = $offset;
    1316. 

  1316. 				$offset += $table[$tag]['length'];
    1317. 

  1317. 				// check sum is not changed (so keep the following line commented)
    1318. 

  1318. 				//$table[$tag]['checkSum'] = self::_getTTFtableChecksum($table[$tag]['data'], $table[$tag]['length']);
    1319. 

  1319. 			} else {
    1320. 

  1320. 				unset($table[$tag]);
    1321. 

  1321. 			}
    1322. 

  1322. 		}
    1323. 

  1323. 		// add loca
    1324. 

  1324. 		$table['loca']['data'] = $loca;
    1325. 

  1325. 		$table['loca']['length'] = strlen($loca);
    1326. 

  1326. 		$pad = 4 - ($table['loca']['length'] % 4);
    1327. 

  1327. 		if ($pad != 4) {
    1328. 

  1328. 			// the length of a table must be a multiple of four bytes
    1329. 

  1329. 			$table['loca']['length'] += $pad;
    1330. 

  1330. 			$table['loca']['data'] .= str_repeat("\x0", $pad);
    1331. 

  1331. 		}
    1332. 

  1332. 		$table['loca']['offset'] = $offset;
    1333. 

  1333. 		$table['loca']['checkSum'] = self::_getTTFtableChecksum($table['loca']['data'], $table['loca']['length']);
    1334. 

  1334. 		$offset += $table['loca']['length'];
    1335. 

  1335. 		// add glyf
    1336. 

  1336. 		$table['glyf']['data'] = $glyf;
    1337. 

  1337. 		$table['glyf']['length'] = strlen($glyf);
    1338. 

  1338. 		$pad = 4 - ($table['glyf']['length'] % 4);
    1339. 

  1339. 		if ($pad != 4) {
    1340. 

  1340. 			// the length of a table must be a multiple of four bytes
    1341. 

  1341. 			$table['glyf']['length'] += $pad;
    1342. 

  1342. 			$table['glyf']['data'] .= str_repeat("\x0", $pad);
    1343. 

  1343. 		}
    1344. 

  1344. 		$table['glyf']['offset'] = $offset;
    1345. 

  1345. 		$table['glyf']['checkSum'] = self::_getTTFtableChecksum($table['glyf']['data'], $table['glyf']['length']);
    1346. 

  1346. 		// rebuild font
    1347. 

  1347. 		…
    1348.

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