QRspec.php 23 KB

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  1. <?php
  2. /*
  3. * PHP QR Code encoder
  4. *
  5. * QR Code specifications
  6. *
  7. * Based on libqrencode C library distributed under LGPL 2.1
  8. * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
  9. *
  10. * PHP QR Code is distributed under LGPL 3
  11. * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
  12. *
  13. * The following data / specifications are taken from
  14. * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
  15. * or
  16. * "Automatic identification and data capture techniques --
  17. * QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
  18. *
  19. * This library is free software; you can redistribute it and/or
  20. * modify it under the terms of the GNU Lesser General Public
  21. * License as published by the Free Software Foundation; either
  22. * version 3 of the License, or any later version.
  23. *
  24. * This library is distributed in the hope that it will be useful,
  25. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  26. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  27. * Lesser General Public License for more details.
  28. *
  29. * You should have received a copy of the GNU Lesser General Public
  30. * License along with this library; if not, write to the Free Software
  31. * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  32. */
  33. namespace PHPQRCode;
  34. class QRspec {
  35. public static $capacity = array(
  36. array( 0, 0, 0, array( 0, 0, 0, 0)),
  37. array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
  38. array( 25, 44, 7, array( 10, 16, 22, 28)),
  39. array( 29, 70, 7, array( 15, 26, 36, 44)),
  40. array( 33, 100, 7, array( 20, 36, 52, 64)),
  41. array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
  42. array( 41, 172, 7, array( 36, 64, 96, 112)),
  43. array( 45, 196, 0, array( 40, 72, 108, 130)),
  44. array( 49, 242, 0, array( 48, 88, 132, 156)),
  45. array( 53, 292, 0, array( 60, 110, 160, 192)),
  46. array( 57, 346, 0, array( 72, 130, 192, 224)), //10
  47. array( 61, 404, 0, array( 80, 150, 224, 264)),
  48. array( 65, 466, 0, array( 96, 176, 260, 308)),
  49. array( 69, 532, 0, array( 104, 198, 288, 352)),
  50. array( 73, 581, 3, array( 120, 216, 320, 384)),
  51. array( 77, 655, 3, array( 132, 240, 360, 432)), //15
  52. array( 81, 733, 3, array( 144, 280, 408, 480)),
  53. array( 85, 815, 3, array( 168, 308, 448, 532)),
  54. array( 89, 901, 3, array( 180, 338, 504, 588)),
  55. array( 93, 991, 3, array( 196, 364, 546, 650)),
  56. array( 97, 1085, 3, array( 224, 416, 600, 700)), //20
  57. array(101, 1156, 4, array( 224, 442, 644, 750)),
  58. array(105, 1258, 4, array( 252, 476, 690, 816)),
  59. array(109, 1364, 4, array( 270, 504, 750, 900)),
  60. array(113, 1474, 4, array( 300, 560, 810, 960)),
  61. array(117, 1588, 4, array( 312, 588, 870, 1050)), //25
  62. array(121, 1706, 4, array( 336, 644, 952, 1110)),
  63. array(125, 1828, 4, array( 360, 700, 1020, 1200)),
  64. array(129, 1921, 3, array( 390, 728, 1050, 1260)),
  65. array(133, 2051, 3, array( 420, 784, 1140, 1350)),
  66. array(137, 2185, 3, array( 450, 812, 1200, 1440)), //30
  67. array(141, 2323, 3, array( 480, 868, 1290, 1530)),
  68. array(145, 2465, 3, array( 510, 924, 1350, 1620)),
  69. array(149, 2611, 3, array( 540, 980, 1440, 1710)),
  70. array(153, 2761, 3, array( 570, 1036, 1530, 1800)),
  71. array(157, 2876, 0, array( 570, 1064, 1590, 1890)), //35
  72. array(161, 3034, 0, array( 600, 1120, 1680, 1980)),
  73. array(165, 3196, 0, array( 630, 1204, 1770, 2100)),
  74. array(169, 3362, 0, array( 660, 1260, 1860, 2220)),
  75. array(173, 3532, 0, array( 720, 1316, 1950, 2310)),
  76. array(177, 3706, 0, array( 750, 1372, 2040, 2430)) //40
  77. );
  78. //----------------------------------------------------------------------
  79. public static function getDataLength($version, $level)
  80. {
  81. return self::$capacity[$version][Constants::QRCAP_WORDS] - self::$capacity[$version][Constants::QRCAP_EC][$level];
  82. }
  83. //----------------------------------------------------------------------
  84. public static function getECCLength($version, $level)
  85. {
  86. return self::$capacity[$version][Constants::QRCAP_EC][$level];
  87. }
  88. //----------------------------------------------------------------------
  89. public static function getWidth($version)
  90. {
  91. return self::$capacity[$version][Constants::QRCAP_WIDTH];
  92. }
  93. //----------------------------------------------------------------------
  94. public static function getRemainder($version)
  95. {
  96. return self::$capacity[$version][Constants::QRCAP_REMINDER];
  97. }
  98. //----------------------------------------------------------------------
  99. public static function getMinimumVersion($size, $level)
  100. {
  101. for($i=1; $i<= Constants::QRSPEC_VERSION_MAX; $i++) {
  102. $words = self::$capacity[$i][Constants::QRCAP_WORDS] - self::$capacity[$i][Constants::QRCAP_EC][$level];
  103. if($words >= $size)
  104. return $i;
  105. }
  106. return -1;
  107. }
  108. //######################################################################
  109. public static $lengthTableBits = array(
  110. array(10, 12, 14),
  111. array( 9, 11, 13),
  112. array( 8, 16, 16),
  113. array( 8, 10, 12)
  114. );
  115. //----------------------------------------------------------------------
  116. public static function lengthIndicator($mode, $version)
  117. {
  118. if ($mode == Constants::QR_MODE_STRUCTURE)
  119. return 0;
  120. if ($version <= 9) {
  121. $l = 0;
  122. } else if ($version <= 26) {
  123. $l = 1;
  124. } else {
  125. $l = 2;
  126. }
  127. return self::$lengthTableBits[$mode][$l];
  128. }
  129. //----------------------------------------------------------------------
  130. public static function maximumWords($mode, $version)
  131. {
  132. if($mode == Constants::QR_MODE_STRUCTURE)
  133. return 3;
  134. if($version <= 9) {
  135. $l = 0;
  136. } else if($version <= 26) {
  137. $l = 1;
  138. } else {
  139. $l = 2;
  140. }
  141. $bits = self::$lengthTableBits[$mode][$l];
  142. $words = (1 << $bits) - 1;
  143. if($mode == Constants::QR_MODE_KANJI) {
  144. $words *= 2; // the number of bytes is required
  145. }
  146. return $words;
  147. }
  148. // Error correction code -----------------------------------------------
  149. // Table of the error correction code (Reed-Solomon block)
  150. // See Table 12-16 (pp.30-36), JIS X0510:2004.
  151. public static $eccTable = array(
  152. array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)),
  153. array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
  154. array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)),
  155. array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)),
  156. array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)),
  157. array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
  158. array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)),
  159. array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)),
  160. array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)),
  161. array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)),
  162. array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), //10
  163. array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)),
  164. array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)),
  165. array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)),
  166. array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)),
  167. array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), //15
  168. array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)),
  169. array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)),
  170. array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)),
  171. array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)),
  172. array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), //20
  173. array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)),
  174. array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)),
  175. array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)),
  176. array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)),
  177. array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), //25
  178. array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)),
  179. array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)),
  180. array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)),
  181. array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)),
  182. array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), //30
  183. array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)),
  184. array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)),
  185. array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)),
  186. array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)),
  187. array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), //35
  188. array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)),
  189. array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)),
  190. array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)),
  191. array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)),
  192. array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)),//40
  193. );
  194. //----------------------------------------------------------------------
  195. // CACHEABLE!!!
  196. public static function getEccSpec($version, $level, array &$spec)
  197. {
  198. if (count($spec) < 5) {
  199. $spec = array(0,0,0,0,0);
  200. }
  201. $b1 = self::$eccTable[$version][$level][0];
  202. $b2 = self::$eccTable[$version][$level][1];
  203. $data = self::getDataLength($version, $level);
  204. $ecc = self::getECCLength($version, $level);
  205. if($b2 == 0) {
  206. $spec[0] = $b1;
  207. $spec[1] = (int)($data / $b1);
  208. $spec[2] = (int)($ecc / $b1);
  209. $spec[3] = 0;
  210. $spec[4] = 0;
  211. } else {
  212. $spec[0] = $b1;
  213. $spec[1] = (int)($data / ($b1 + $b2));
  214. $spec[2] = (int)($ecc / ($b1 + $b2));
  215. $spec[3] = $b2;
  216. $spec[4] = $spec[1] + 1;
  217. }
  218. }
  219. // Alignment pattern ---------------------------------------------------
  220. // Positions of alignment patterns.
  221. // This array includes only the second and the third position of the
  222. // alignment patterns. Rest of them can be calculated from the distance
  223. // between them.
  224. // See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
  225. public static $alignmentPattern = array(
  226. array( 0, 0),
  227. array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
  228. array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
  229. array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), //11-15
  230. array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), //16-20
  231. array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), //21-25
  232. array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), //26-30
  233. array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), //31-35
  234. array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58), //35-40
  235. );
  236. /** --------------------------------------------------------------------
  237. * Put an alignment marker.
  238. * @param frame
  239. * @param width
  240. * @param ox,oy center coordinate of the pattern
  241. */
  242. public static function putAlignmentMarker(array &$frame, $ox, $oy)
  243. {
  244. $finder = array(
  245. "\xa1\xa1\xa1\xa1\xa1",
  246. "\xa1\xa0\xa0\xa0\xa1",
  247. "\xa1\xa0\xa1\xa0\xa1",
  248. "\xa1\xa0\xa0\xa0\xa1",
  249. "\xa1\xa1\xa1\xa1\xa1"
  250. );
  251. $yStart = $oy-2;
  252. $xStart = $ox-2;
  253. for($y=0; $y<5; $y++) {
  254. QRstr::set($frame, $xStart, $yStart+$y, $finder[$y]);
  255. }
  256. }
  257. //----------------------------------------------------------------------
  258. public static function putAlignmentPattern($version, &$frame, $width)
  259. {
  260. if($version < 2)
  261. return;
  262. $d = self::$alignmentPattern[$version][1] - self::$alignmentPattern[$version][0];
  263. if($d < 0) {
  264. $w = 2;
  265. } else {
  266. $w = (int)(($width - self::$alignmentPattern[$version][0]) / $d + 2);
  267. }
  268. if($w * $w - 3 == 1) {
  269. $x = self::$alignmentPattern[$version][0];
  270. $y = self::$alignmentPattern[$version][0];
  271. self::putAlignmentMarker($frame, $x, $y);
  272. return;
  273. }
  274. $cx = self::$alignmentPattern[$version][0];
  275. for($x=1; $x<$w - 1; $x++) {
  276. self::putAlignmentMarker($frame, 6, $cx);
  277. self::putAlignmentMarker($frame, $cx, 6);
  278. $cx += $d;
  279. }
  280. $cy = self::$alignmentPattern[$version][0];
  281. for($y=0; $y<$w-1; $y++) {
  282. $cx = self::$alignmentPattern[$version][0];
  283. for($x=0; $x<$w-1; $x++) {
  284. self::putAlignmentMarker($frame, $cx, $cy);
  285. $cx += $d;
  286. }
  287. $cy += $d;
  288. }
  289. }
  290. // Version information pattern -----------------------------------------
  291. // Version information pattern (BCH coded).
  292. // See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
  293. // size: [Constants::QRSPEC_VERSION_MAX - 6]
  294. public static $versionPattern = array(
  295. 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d,
  296. 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9,
  297. 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75,
  298. 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64,
  299. 0x27541, 0x28c69
  300. );
  301. //----------------------------------------------------------------------
  302. public static function getVersionPattern($version)
  303. {
  304. if($version < 7 || $version > Constants::QRSPEC_VERSION_MAX)
  305. return 0;
  306. return self::$versionPattern[$version -7];
  307. }
  308. // Format information --------------------------------------------------
  309. // See calcFormatInfo in tests/test_qrspec.c (orginal qrencode c lib)
  310. public static $formatInfo = array(
  311. array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976),
  312. array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0),
  313. array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed),
  314. array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)
  315. );
  316. public static function getFormatInfo($mask, $level)
  317. {
  318. if($mask < 0 || $mask > 7)
  319. return 0;
  320. if($level < 0 || $level > 3)
  321. return 0;
  322. return self::$formatInfo[$level][$mask];
  323. }
  324. // Frame ---------------------------------------------------------------
  325. // Cache of initial frames.
  326. public static $frames = array();
  327. /** --------------------------------------------------------------------
  328. * Put a finder pattern.
  329. * @param frame
  330. * @param width
  331. * @param ox,oy upper-left coordinate of the pattern
  332. */
  333. public static function putFinderPattern(&$frame, $ox, $oy)
  334. {
  335. $finder = array(
  336. "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
  337. "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
  338. "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
  339. "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
  340. "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
  341. "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
  342. "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
  343. );
  344. for($y=0; $y<7; $y++) {
  345. QRstr::set($frame, $ox, $oy+$y, $finder[$y]);
  346. }
  347. }
  348. //----------------------------------------------------------------------
  349. public static function createFrame($version)
  350. {
  351. $width = self::$capacity[$version][Constants::QRCAP_WIDTH];
  352. $frameLine = str_repeat ("\0", $width);
  353. $frame = array_fill(0, $width, $frameLine);
  354. // Finder pattern
  355. self::putFinderPattern($frame, 0, 0);
  356. self::putFinderPattern($frame, $width - 7, 0);
  357. self::putFinderPattern($frame, 0, $width - 7);
  358. // Separator
  359. $yOffset = $width - 7;
  360. for($y=0; $y<7; $y++) {
  361. $frame[$y][7] = "\xc0";
  362. $frame[$y][$width - 8] = "\xc0";
  363. $frame[$yOffset][7] = "\xc0";
  364. $yOffset++;
  365. }
  366. $setPattern = str_repeat("\xc0", 8);
  367. QRstr::set($frame, 0, 7, $setPattern);
  368. QRstr::set($frame, $width-8, 7, $setPattern);
  369. QRstr::set($frame, 0, $width - 8, $setPattern);
  370. // Format info
  371. $setPattern = str_repeat("\x84", 9);
  372. QRstr::set($frame, 0, 8, $setPattern);
  373. QRstr::set($frame, $width - 8, 8, $setPattern, 8);
  374. $yOffset = $width - 8;
  375. for($y=0; $y<8; $y++,$yOffset++) {
  376. $frame[$y][8] = "\x84";
  377. $frame[$yOffset][8] = "\x84";
  378. }
  379. // Timing pattern
  380. for($i=1; $i<$width-15; $i++) {
  381. $frame[6][7+$i] = chr(0x90 | ($i & 1));
  382. $frame[7+$i][6] = chr(0x90 | ($i & 1));
  383. }
  384. // Alignment pattern
  385. self::putAlignmentPattern($version, $frame, $width);
  386. // Version information
  387. if($version >= 7) {
  388. $vinf = self::getVersionPattern($version);
  389. $v = $vinf;
  390. for($x=0; $x<6; $x++) {
  391. for($y=0; $y<3; $y++) {
  392. $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
  393. $v = $v >> 1;
  394. }
  395. }
  396. $v = $vinf;
  397. for($y=0; $y<6; $y++) {
  398. for($x=0; $x<3; $x++) {
  399. $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
  400. $v = $v >> 1;
  401. }
  402. }
  403. }
  404. // and a little bit...
  405. $frame[$width - 8][8] = "\x81";
  406. return $frame;
  407. }
  408. //----------------------------------------------------------------------
  409. public static function debug($frame, $binary_mode = false)
  410. {
  411. if ($binary_mode) {
  412. foreach ($frame as &$frameLine) {
  413. $frameLine = join('<span class="m">&nbsp;&nbsp;</span>', explode('0', $frameLine));
  414. $frameLine = join('&#9608;&#9608;', explode('1', $frameLine));
  415. }
  416. ?>
  417. <style>
  418. .m { background-color: white; }
  419. </style>
  420. <?php
  421. echo '<pre><tt><br/ ><br/ ><br/ >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
  422. echo join("<br/ >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;", $frame);
  423. echo '</tt></pre><br/ ><br/ ><br/ ><br/ ><br/ ><br/ >';
  424. } else {
  425. foreach ($frame as &$frameLine) {
  426. $frameLine = join('<span class="m">&nbsp;</span>', explode("\xc0", $frameLine));
  427. $frameLine = join('<span class="m">&#9618;</span>', explode("\xc1", $frameLine));
  428. $frameLine = join('<span class="p">&nbsp;</span>', explode("\xa0", $frameLine));
  429. $frameLine = join('<span class="p">&#9618;</span>', explode("\xa1", $frameLine));
  430. $frameLine = join('<span class="s">&#9671;</span>', explode("\x84", $frameLine)); //format 0
  431. $frameLine = join('<span class="s">&#9670;</span>', explode("\x85", $frameLine)); //format 1
  432. $frameLine = join('<span class="x">&#9762;</span>', explode("\x81", $frameLine)); //special bit
  433. $frameLine = join('<span class="c">&nbsp;</span>', explode("\x90", $frameLine)); //clock 0
  434. $frameLine = join('<span class="c">&#9719;</span>', explode("\x91", $frameLine)); //clock 1
  435. $frameLine = join('<span class="f">&nbsp;</span>', explode("\x88", $frameLine)); //version
  436. $frameLine = join('<span class="f">&#9618;</span>', explode("\x89", $frameLine)); //version
  437. $frameLine = join('&#9830;', explode("\x01", $frameLine));
  438. $frameLine = join('&#8901;', explode("\0", $frameLine));
  439. }
  440. ?>
  441. <style>
  442. .p { background-color: yellow; }
  443. .m { background-color: #00FF00; }
  444. .s { background-color: #FF0000; }
  445. .c { background-color: aqua; }
  446. .x { background-color: pink; }
  447. .f { background-color: gold; }
  448. </style>
  449. <?php
  450. echo "<pre><tt>";
  451. echo join("<br/ >", $frame);
  452. echo "</tt></pre>";
  453. }
  454. }
  455. //----------------------------------------------------------------------
  456. public static function serial($frame)
  457. {
  458. return gzcompress(join("\n", $frame), 9);
  459. }
  460. //----------------------------------------------------------------------
  461. public static function unserial($code)
  462. {
  463. return explode("\n", gzuncompress($code));
  464. }
  465. //----------------------------------------------------------------------
  466. public static function newFrame($version)
  467. {
  468. if($version < 1 || $version > Constants::QRSPEC_VERSION_MAX)
  469. return null;
  470. if(!isset(self::$frames[$version])) {
  471. $fileName = Constants::QR_CACHE_DIR.'frame_'.$version.'.dat';
  472. if (Constants::QR_CACHEABLE) {
  473. if (file_exists($fileName)) {
  474. self::$frames[$version] = self::unserial(file_get_contents($fileName));
  475. } else {
  476. self::$frames[$version] = self::createFrame($version);
  477. file_put_contents($fileName, self::serial(self::$frames[$version]));
  478. }
  479. } else {
  480. self::$frames[$version] = self::createFrame($version);
  481. }
  482. }
  483. if(is_null(self::$frames[$version]))
  484. return null;
  485. return self::$frames[$version];
  486. }
  487. //----------------------------------------------------------------------
  488. public static function rsBlockNum($spec) { return $spec[0] + $spec[3]; }
  489. public static function rsBlockNum1($spec) { return $spec[0]; }
  490. public static function rsDataCodes1($spec) { return $spec[1]; }
  491. public static function rsEccCodes1($spec) { return $spec[2]; }
  492. public static function rsBlockNum2($spec) { return $spec[3]; }
  493. public static function rsDataCodes2($spec) { return $spec[4]; }
  494. public static function rsEccCodes2($spec) { return $spec[2]; }
  495. public static function rsDataLength($spec) { return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); }
  496. public static function rsEccLength($spec) { return ($spec[0] + $spec[3]) * $spec[2]; }
  497. }