qrspec.php 25 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. define('QRSPEC_VERSION_MAX', 40);
  34. define('QRSPEC_WIDTH_MAX', 177);
  35. define('QRCAP_WIDTH', 0);
  36. define('QRCAP_WORDS', 1);
  37. define('QRCAP_REMINDER', 2);
  38. define('QRCAP_EC', 3);
  39. class QRspec {
  40. public static $capacity = array(
  41. array( 0, 0, 0, array( 0, 0, 0, 0)),
  42. array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
  43. array( 25, 44, 7, array( 10, 16, 22, 28)),
  44. array( 29, 70, 7, array( 15, 26, 36, 44)),
  45. array( 33, 100, 7, array( 20, 36, 52, 64)),
  46. array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
  47. array( 41, 172, 7, array( 36, 64, 96, 112)),
  48. array( 45, 196, 0, array( 40, 72, 108, 130)),
  49. array( 49, 242, 0, array( 48, 88, 132, 156)),
  50. array( 53, 292, 0, array( 60, 110, 160, 192)),
  51. array( 57, 346, 0, array( 72, 130, 192, 224)), //10
  52. array( 61, 404, 0, array( 80, 150, 224, 264)),
  53. array( 65, 466, 0, array( 96, 176, 260, 308)),
  54. array( 69, 532, 0, array( 104, 198, 288, 352)),
  55. array( 73, 581, 3, array( 120, 216, 320, 384)),
  56. array( 77, 655, 3, array( 132, 240, 360, 432)), //15
  57. array( 81, 733, 3, array( 144, 280, 408, 480)),
  58. array( 85, 815, 3, array( 168, 308, 448, 532)),
  59. array( 89, 901, 3, array( 180, 338, 504, 588)),
  60. array( 93, 991, 3, array( 196, 364, 546, 650)),
  61. array( 97, 1085, 3, array( 224, 416, 600, 700)), //20
  62. array(101, 1156, 4, array( 224, 442, 644, 750)),
  63. array(105, 1258, 4, array( 252, 476, 690, 816)),
  64. array(109, 1364, 4, array( 270, 504, 750, 900)),
  65. array(113, 1474, 4, array( 300, 560, 810, 960)),
  66. array(117, 1588, 4, array( 312, 588, 870, 1050)), //25
  67. array(121, 1706, 4, array( 336, 644, 952, 1110)),
  68. array(125, 1828, 4, array( 360, 700, 1020, 1200)),
  69. array(129, 1921, 3, array( 390, 728, 1050, 1260)),
  70. array(133, 2051, 3, array( 420, 784, 1140, 1350)),
  71. array(137, 2185, 3, array( 450, 812, 1200, 1440)), //30
  72. array(141, 2323, 3, array( 480, 868, 1290, 1530)),
  73. array(145, 2465, 3, array( 510, 924, 1350, 1620)),
  74. array(149, 2611, 3, array( 540, 980, 1440, 1710)),
  75. array(153, 2761, 3, array( 570, 1036, 1530, 1800)),
  76. array(157, 2876, 0, array( 570, 1064, 1590, 1890)), //35
  77. array(161, 3034, 0, array( 600, 1120, 1680, 1980)),
  78. array(165, 3196, 0, array( 630, 1204, 1770, 2100)),
  79. array(169, 3362, 0, array( 660, 1260, 1860, 2220)),
  80. array(173, 3532, 0, array( 720, 1316, 1950, 2310)),
  81. array(177, 3706, 0, array( 750, 1372, 2040, 2430)) //40
  82. );
  83. //----------------------------------------------------------------------
  84. public static function getDataLength($version, $level)
  85. {
  86. return self::$capacity[$version][QRCAP_WORDS] - self::$capacity[$version][QRCAP_EC][$level];
  87. }
  88. //----------------------------------------------------------------------
  89. public static function getECCLength($version, $level)
  90. {
  91. return self::$capacity[$version][QRCAP_EC][$level];
  92. }
  93. //----------------------------------------------------------------------
  94. public static function getWidth($version)
  95. {
  96. return self::$capacity[$version][QRCAP_WIDTH];
  97. }
  98. //----------------------------------------------------------------------
  99. public static function getRemainder($version)
  100. {
  101. return self::$capacity[$version][QRCAP_REMINDER];
  102. }
  103. //----------------------------------------------------------------------
  104. public static function getMinimumVersion($size, $level)
  105. {
  106. for($i=1; $i<= QRSPEC_VERSION_MAX; $i++) {
  107. $words = self::$capacity[$i][QRCAP_WORDS] - self::$capacity[$i][QRCAP_EC][$level];
  108. if($words >= $size)
  109. return $i;
  110. }
  111. return -1;
  112. }
  113. //######################################################################
  114. public static $lengthTableBits = array(
  115. array(10, 12, 14),
  116. array( 9, 11, 13),
  117. array( 8, 16, 16),
  118. array( 8, 10, 12)
  119. );
  120. //----------------------------------------------------------------------
  121. public static function lengthIndicator($mode, $version)
  122. {
  123. if ($mode == QR_MODE_STRUCTURE)
  124. return 0;
  125. if ($version <= 9) {
  126. $l = 0;
  127. } else if ($version <= 26) {
  128. $l = 1;
  129. } else {
  130. $l = 2;
  131. }
  132. return self::$lengthTableBits[$mode][$l];
  133. }
  134. //----------------------------------------------------------------------
  135. public static function maximumWords($mode, $version)
  136. {
  137. if($mode == QR_MODE_STRUCTURE)
  138. return 3;
  139. if($version <= 9) {
  140. $l = 0;
  141. } else if($version <= 26) {
  142. $l = 1;
  143. } else {
  144. $l = 2;
  145. }
  146. $bits = self::$lengthTableBits[$mode][$l];
  147. $words = (1 << $bits) - 1;
  148. if($mode == QR_MODE_KANJI) {
  149. $words *= 2; // the number of bytes is required
  150. }
  151. return $words;
  152. }
  153. // Error correction code -----------------------------------------------
  154. // Table of the error correction code (Reed-Solomon block)
  155. // See Table 12-16 (pp.30-36), JIS X0510:2004.
  156. public static $eccTable = array(
  157. array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)),
  158. array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
  159. array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)),
  160. array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)),
  161. array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)),
  162. array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
  163. array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)),
  164. array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)),
  165. array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)),
  166. array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)),
  167. array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), //10
  168. array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)),
  169. array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)),
  170. array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)),
  171. array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)),
  172. array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), //15
  173. array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)),
  174. array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)),
  175. array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)),
  176. array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)),
  177. array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), //20
  178. array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)),
  179. array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)),
  180. array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)),
  181. array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)),
  182. array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), //25
  183. array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)),
  184. array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)),
  185. array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)),
  186. array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)),
  187. array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), //30
  188. array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)),
  189. array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)),
  190. array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)),
  191. array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)),
  192. array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), //35
  193. array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)),
  194. array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)),
  195. array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)),
  196. array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)),
  197. array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)),//40
  198. );
  199. //----------------------------------------------------------------------
  200. // CACHEABLE!!!
  201. public static function getEccSpec($version, $level, array &$spec)
  202. {
  203. if (count($spec) < 5) {
  204. $spec = array(0,0,0,0,0);
  205. }
  206. $b1 = self::$eccTable[$version][$level][0];
  207. $b2 = self::$eccTable[$version][$level][1];
  208. $data = self::getDataLength($version, $level);
  209. $ecc = self::getECCLength($version, $level);
  210. if($b2 == 0) {
  211. $spec[0] = $b1;
  212. $spec[1] = (int)($data / $b1);
  213. $spec[2] = (int)($ecc / $b1);
  214. $spec[3] = 0;
  215. $spec[4] = 0;
  216. } else {
  217. $spec[0] = $b1;
  218. $spec[1] = (int)($data / ($b1 + $b2));
  219. $spec[2] = (int)($ecc / ($b1 + $b2));
  220. $spec[3] = $b2;
  221. $spec[4] = $spec[1] + 1;
  222. }
  223. }
  224. // Alignment pattern ---------------------------------------------------
  225. // Positions of alignment patterns.
  226. // This array includes only the second and the third position of the
  227. // alignment patterns. Rest of them can be calculated from the distance
  228. // between them.
  229. // See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
  230. public static $alignmentPattern = array(
  231. array( 0, 0),
  232. array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
  233. array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
  234. array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), //11-15
  235. array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), //16-20
  236. array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), //21-25
  237. array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), //26-30
  238. array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), //31-35
  239. array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58), //35-40
  240. );
  241. /** --------------------------------------------------------------------
  242. * Put an alignment marker.
  243. * @param frame
  244. * @param width
  245. * @param ox,oy center coordinate of the pattern
  246. */
  247. public static function putAlignmentMarker(array &$frame, $ox, $oy)
  248. {
  249. $finder = array(
  250. "\xa1\xa1\xa1\xa1\xa1",
  251. "\xa1\xa0\xa0\xa0\xa1",
  252. "\xa1\xa0\xa1\xa0\xa1",
  253. "\xa1\xa0\xa0\xa0\xa1",
  254. "\xa1\xa1\xa1\xa1\xa1"
  255. );
  256. $yStart = $oy-2;
  257. $xStart = $ox-2;
  258. for($y=0; $y<5; $y++) {
  259. QRstr::set($frame, $xStart, $yStart+$y, $finder[$y]);
  260. }
  261. }
  262. //----------------------------------------------------------------------
  263. public static function putAlignmentPattern($version, &$frame, $width)
  264. {
  265. if($version < 2)
  266. return;
  267. $d = self::$alignmentPattern[$version][1] - self::$alignmentPattern[$version][0];
  268. if($d < 0) {
  269. $w = 2;
  270. } else {
  271. $w = (int)(($width - self::$alignmentPattern[$version][0]) / $d + 2);
  272. }
  273. if($w * $w - 3 == 1) {
  274. $x = self::$alignmentPattern[$version][0];
  275. $y = self::$alignmentPattern[$version][0];
  276. self::putAlignmentMarker($frame, $x, $y);
  277. return;
  278. }
  279. $cx = self::$alignmentPattern[$version][0];
  280. for($x=1; $x<$w - 1; $x++) {
  281. self::putAlignmentMarker($frame, 6, $cx);
  282. self::putAlignmentMarker($frame, $cx, 6);
  283. $cx += $d;
  284. }
  285. $cy = self::$alignmentPattern[$version][0];
  286. for($y=0; $y<$w-1; $y++) {
  287. $cx = self::$alignmentPattern[$version][0];
  288. for($x=0; $x<$w-1; $x++) {
  289. self::putAlignmentMarker($frame, $cx, $cy);
  290. $cx += $d;
  291. }
  292. $cy += $d;
  293. }
  294. }
  295. // Version information pattern -----------------------------------------
  296. // Version information pattern (BCH coded).
  297. // See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
  298. // size: [QRSPEC_VERSION_MAX - 6]
  299. public static $versionPattern = array(
  300. 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d,
  301. 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9,
  302. 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75,
  303. 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64,
  304. 0x27541, 0x28c69
  305. );
  306. //----------------------------------------------------------------------
  307. public static function getVersionPattern($version)
  308. {
  309. if($version < 7 || $version > QRSPEC_VERSION_MAX)
  310. return 0;
  311. return self::$versionPattern[$version -7];
  312. }
  313. // Format information --------------------------------------------------
  314. // See calcFormatInfo in tests/test_qrspec.c (orginal qrencode c lib)
  315. public static $formatInfo = array(
  316. array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976),
  317. array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0),
  318. array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed),
  319. array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)
  320. );
  321. public static function getFormatInfo($mask, $level)
  322. {
  323. if($mask < 0 || $mask > 7)
  324. return 0;
  325. if($level < 0 || $level > 3)
  326. return 0;
  327. return self::$formatInfo[$level][$mask];
  328. }
  329. // Frame ---------------------------------------------------------------
  330. // Cache of initial frames.
  331. public static $frames = array();
  332. /** --------------------------------------------------------------------
  333. * Put a finder pattern.
  334. * @param frame
  335. * @param width
  336. * @param ox,oy upper-left coordinate of the pattern
  337. */
  338. public static function putFinderPattern(&$frame, $ox, $oy)
  339. {
  340. $finder = array(
  341. "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
  342. "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
  343. "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
  344. "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
  345. "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
  346. "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
  347. "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
  348. );
  349. for($y=0; $y<7; $y++) {
  350. QRstr::set($frame, $ox, $oy+$y, $finder[$y]);
  351. }
  352. }
  353. //----------------------------------------------------------------------
  354. public static function createFrame($version)
  355. {
  356. $width = self::$capacity[$version][QRCAP_WIDTH];
  357. $frameLine = str_repeat ("\0", $width);
  358. $frame = array_fill(0, $width, $frameLine);
  359. // Finder pattern
  360. self::putFinderPattern($frame, 0, 0);
  361. self::putFinderPattern($frame, $width - 7, 0);
  362. self::putFinderPattern($frame, 0, $width - 7);
  363. // Separator
  364. $yOffset = $width - 7;
  365. for($y=0; $y<7; $y++) {
  366. $frame[$y][7] = "\xc0";
  367. $frame[$y][$width - 8] = "\xc0";
  368. $frame[$yOffset][7] = "\xc0";
  369. $yOffset++;
  370. }
  371. $setPattern = str_repeat("\xc0", 8);
  372. QRstr::set($frame, 0, 7, $setPattern);
  373. QRstr::set($frame, $width-8, 7, $setPattern);
  374. QRstr::set($frame, 0, $width - 8, $setPattern);
  375. // Format info
  376. $setPattern = str_repeat("\x84", 9);
  377. QRstr::set($frame, 0, 8, $setPattern);
  378. QRstr::set($frame, $width - 8, 8, $setPattern, 8);
  379. $yOffset = $width - 8;
  380. for($y=0; $y<8; $y++,$yOffset++) {
  381. $frame[$y][8] = "\x84";
  382. $frame[$yOffset][8] = "\x84";
  383. }
  384. // Timing pattern
  385. for($i=1; $i<$width-15; $i++) {
  386. $frame[6][7+$i] = chr(0x90 | ($i & 1));
  387. $frame[7+$i][6] = chr(0x90 | ($i & 1));
  388. }
  389. // Alignment pattern
  390. self::putAlignmentPattern($version, $frame, $width);
  391. // Version information
  392. if($version >= 7) {
  393. $vinf = self::getVersionPattern($version);
  394. $v = $vinf;
  395. for($x=0; $x<6; $x++) {
  396. for($y=0; $y<3; $y++) {
  397. $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
  398. $v = $v >> 1;
  399. }
  400. }
  401. $v = $vinf;
  402. for($y=0; $y<6; $y++) {
  403. for($x=0; $x<3; $x++) {
  404. $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
  405. $v = $v >> 1;
  406. }
  407. }
  408. }
  409. // and a little bit...
  410. $frame[$width - 8][8] = "\x81";
  411. return $frame;
  412. }
  413. //----------------------------------------------------------------------
  414. public static function debug($frame, $binary_mode = false)
  415. {
  416. if ($binary_mode) {
  417. foreach ($frame as &$frameLine) {
  418. $frameLine = join('<span class="m">&nbsp;&nbsp;</span>', explode('0', $frameLine));
  419. $frameLine = join('&#9608;&#9608;', explode('1', $frameLine));
  420. }
  421. ?>
  422. <style>
  423. .m { background-color: white; }
  424. </style>
  425. <?php
  426. echo '<pre><tt><br/ ><br/ ><br/ >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
  427. echo join("<br/ >&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;", $frame);
  428. echo '</tt></pre><br/ ><br/ ><br/ ><br/ ><br/ ><br/ >';
  429. } else {
  430. foreach ($frame as &$frameLine) {
  431. $frameLine = join('<span class="m">&nbsp;</span>', explode("\xc0", $frameLine));
  432. $frameLine = join('<span class="m">&#9618;</span>', explode("\xc1", $frameLine));
  433. $frameLine = join('<span class="p">&nbsp;</span>', explode("\xa0", $frameLine));
  434. $frameLine = join('<span class="p">&#9618;</span>', explode("\xa1", $frameLine));
  435. $frameLine = join('<span class="s">&#9671;</span>', explode("\x84", $frameLine)); //format 0
  436. $frameLine = join('<span class="s">&#9670;</span>', explode("\x85", $frameLine)); //format 1
  437. $frameLine = join('<span class="x">&#9762;</span>', explode("\x81", $frameLine)); //special bit
  438. $frameLine = join('<span class="c">&nbsp;</span>', explode("\x90", $frameLine)); //clock 0
  439. $frameLine = join('<span class="c">&#9719;</span>', explode("\x91", $frameLine)); //clock 1
  440. $frameLine = join('<span class="f">&nbsp;</span>', explode("\x88", $frameLine)); //version
  441. $frameLine = join('<span class="f">&#9618;</span>', explode("\x89", $frameLine)); //version
  442. $frameLine = join('&#9830;', explode("\x01", $frameLine));
  443. $frameLine = join('&#8901;', explode("\0", $frameLine));
  444. }
  445. ?>
  446. <style>
  447. .p { background-color: yellow; }
  448. .m { background-color: #00FF00; }
  449. .s { background-color: #FF0000; }
  450. .c { background-color: aqua; }
  451. .x { background-color: pink; }
  452. .f { background-color: gold; }
  453. </style>
  454. <?php
  455. echo "<pre><tt>";
  456. echo join("<br/ >", $frame);
  457. echo "</tt></pre>";
  458. }
  459. }
  460. //----------------------------------------------------------------------
  461. public static function serial($frame)
  462. {
  463. return gzcompress(join("\n", $frame), 9);
  464. }
  465. //----------------------------------------------------------------------
  466. public static function unserial($code)
  467. {
  468. return explode("\n", gzuncompress($code));
  469. }
  470. //----------------------------------------------------------------------
  471. public static function newFrame($version)
  472. {
  473. if($version < 1 || $version > QRSPEC_VERSION_MAX)
  474. return null;
  475. if(!isset(self::$frames[$version])) {
  476. $fileName = QR_CACHE_DIR.'frame_'.$version.'.dat';
  477. if (QR_CACHEABLE) {
  478. if (file_exists($fileName)) {
  479. self::$frames[$version] = self::unserial(file_get_contents($fileName));
  480. } else {
  481. self::$frames[$version] = self::createFrame($version);
  482. file_put_contents($fileName, self::serial(self::$frames[$version]));
  483. }
  484. } else {
  485. self::$frames[$version] = self::createFrame($version);
  486. }
  487. }
  488. if(is_null(self::$frames[$version]))
  489. return null;
  490. return self::$frames[$version];
  491. }
  492. //----------------------------------------------------------------------
  493. public static function rsBlockNum($spec) { return $spec[0] + $spec[3]; }
  494. public static function rsBlockNum1($spec) { return $spec[0]; }
  495. public static function rsDataCodes1($spec) { return $spec[1]; }
  496. public static function rsEccCodes1($spec) { return $spec[2]; }
  497. public static function rsBlockNum2($spec) { return $spec[3]; }
  498. public static function rsDataCodes2($spec) { return $spec[4]; }
  499. public static function rsEccCodes2($spec) { return $spec[2]; }
  500. public static function rsDataLength($spec) { return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); }
  501. public static function rsEccLength($spec) { return ($spec[0] + $spec[3]) * $spec[2]; }
  502. }