diff options
| author | friendica <info@friendica.com> | 2014-01-07 20:36:16 -0800 |
|---|---|---|
| committer | friendica <info@friendica.com> | 2014-01-07 20:36:16 -0800 |
| commit | 8b93881ce7ab4e0a8b0c8426da1ddfeed19c2309 (patch) | |
| tree | 52d4b15d798933c068a8eb12374ac192db8fbb42 /library/phpqrcode/qrspec.php | |
| parent | 401183780540812929e35a59348b7f2e347d4b8f (diff) | |
| download | volse-hubzilla-8b93881ce7ab4e0a8b0c8426da1ddfeed19c2309.tar.gz volse-hubzilla-8b93881ce7ab4e0a8b0c8426da1ddfeed19c2309.tar.bz2 volse-hubzilla-8b93881ce7ab4e0a8b0c8426da1ddfeed19c2309.zip | |
qr code support
Diffstat (limited to 'library/phpqrcode/qrspec.php')
| -rw-r--r-- | library/phpqrcode/qrspec.php | 592 |
1 files changed, 592 insertions, 0 deletions
diff --git a/library/phpqrcode/qrspec.php b/library/phpqrcode/qrspec.php new file mode 100644 index 000000000..92aea0c78 --- /dev/null +++ b/library/phpqrcode/qrspec.php @@ -0,0 +1,592 @@ +<?php
+/*
+ * PHP QR Code encoder
+ *
+ * QR Code specifications
+ *
+ * Based on libqrencode C library distributed under LGPL 2.1
+ * Copyright (C) 2006, 2007, 2008, 2009 Kentaro Fukuchi <fukuchi@megaui.net>
+ *
+ * PHP QR Code is distributed under LGPL 3
+ * Copyright (C) 2010 Dominik Dzienia <deltalab at poczta dot fm>
+ *
+ * The following data / specifications are taken from
+ * "Two dimensional symbol -- QR-code -- Basic Specification" (JIS X0510:2004)
+ * or
+ * "Automatic identification and data capture techniques --
+ * QR Code 2005 bar code symbology specification" (ISO/IEC 18004:2006)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+ define('QRSPEC_VERSION_MAX', 40);
+ define('QRSPEC_WIDTH_MAX', 177);
+
+ define('QRCAP_WIDTH', 0);
+ define('QRCAP_WORDS', 1);
+ define('QRCAP_REMINDER', 2);
+ define('QRCAP_EC', 3);
+
+ class QRspec {
+
+ public static $capacity = array(
+ array( 0, 0, 0, array( 0, 0, 0, 0)),
+ array( 21, 26, 0, array( 7, 10, 13, 17)), // 1
+ array( 25, 44, 7, array( 10, 16, 22, 28)),
+ array( 29, 70, 7, array( 15, 26, 36, 44)),
+ array( 33, 100, 7, array( 20, 36, 52, 64)),
+ array( 37, 134, 7, array( 26, 48, 72, 88)), // 5
+ array( 41, 172, 7, array( 36, 64, 96, 112)),
+ array( 45, 196, 0, array( 40, 72, 108, 130)),
+ array( 49, 242, 0, array( 48, 88, 132, 156)),
+ array( 53, 292, 0, array( 60, 110, 160, 192)),
+ array( 57, 346, 0, array( 72, 130, 192, 224)), //10
+ array( 61, 404, 0, array( 80, 150, 224, 264)),
+ array( 65, 466, 0, array( 96, 176, 260, 308)),
+ array( 69, 532, 0, array( 104, 198, 288, 352)),
+ array( 73, 581, 3, array( 120, 216, 320, 384)),
+ array( 77, 655, 3, array( 132, 240, 360, 432)), //15
+ array( 81, 733, 3, array( 144, 280, 408, 480)),
+ array( 85, 815, 3, array( 168, 308, 448, 532)),
+ array( 89, 901, 3, array( 180, 338, 504, 588)),
+ array( 93, 991, 3, array( 196, 364, 546, 650)),
+ array( 97, 1085, 3, array( 224, 416, 600, 700)), //20
+ array(101, 1156, 4, array( 224, 442, 644, 750)),
+ array(105, 1258, 4, array( 252, 476, 690, 816)),
+ array(109, 1364, 4, array( 270, 504, 750, 900)),
+ array(113, 1474, 4, array( 300, 560, 810, 960)),
+ array(117, 1588, 4, array( 312, 588, 870, 1050)), //25
+ array(121, 1706, 4, array( 336, 644, 952, 1110)),
+ array(125, 1828, 4, array( 360, 700, 1020, 1200)),
+ array(129, 1921, 3, array( 390, 728, 1050, 1260)),
+ array(133, 2051, 3, array( 420, 784, 1140, 1350)),
+ array(137, 2185, 3, array( 450, 812, 1200, 1440)), //30
+ array(141, 2323, 3, array( 480, 868, 1290, 1530)),
+ array(145, 2465, 3, array( 510, 924, 1350, 1620)),
+ array(149, 2611, 3, array( 540, 980, 1440, 1710)),
+ array(153, 2761, 3, array( 570, 1036, 1530, 1800)),
+ array(157, 2876, 0, array( 570, 1064, 1590, 1890)), //35
+ array(161, 3034, 0, array( 600, 1120, 1680, 1980)),
+ array(165, 3196, 0, array( 630, 1204, 1770, 2100)),
+ array(169, 3362, 0, array( 660, 1260, 1860, 2220)),
+ array(173, 3532, 0, array( 720, 1316, 1950, 2310)),
+ array(177, 3706, 0, array( 750, 1372, 2040, 2430)) //40
+ );
+
+ //----------------------------------------------------------------------
+ public static function getDataLength($version, $level)
+ {
+ return self::$capacity[$version][QRCAP_WORDS] - self::$capacity[$version][QRCAP_EC][$level];
+ }
+
+ //----------------------------------------------------------------------
+ public static function getECCLength($version, $level)
+ {
+ return self::$capacity[$version][QRCAP_EC][$level];
+ }
+
+ //----------------------------------------------------------------------
+ public static function getWidth($version)
+ {
+ return self::$capacity[$version][QRCAP_WIDTH];
+ }
+
+ //----------------------------------------------------------------------
+ public static function getRemainder($version)
+ {
+ return self::$capacity[$version][QRCAP_REMINDER];
+ }
+
+ //----------------------------------------------------------------------
+ public static function getMinimumVersion($size, $level)
+ {
+
+ for($i=1; $i<= QRSPEC_VERSION_MAX; $i++) {
+ $words = self::$capacity[$i][QRCAP_WORDS] - self::$capacity[$i][QRCAP_EC][$level];
+ if($words >= $size)
+ return $i;
+ }
+
+ return -1;
+ }
+
+ //######################################################################
+
+ public static $lengthTableBits = array(
+ array(10, 12, 14),
+ array( 9, 11, 13),
+ array( 8, 16, 16),
+ array( 8, 10, 12)
+ );
+
+ //----------------------------------------------------------------------
+ public static function lengthIndicator($mode, $version)
+ {
+ if ($mode == QR_MODE_STRUCTURE)
+ return 0;
+
+ if ($version <= 9) {
+ $l = 0;
+ } else if ($version <= 26) {
+ $l = 1;
+ } else {
+ $l = 2;
+ }
+
+ return self::$lengthTableBits[$mode][$l];
+ }
+
+ //----------------------------------------------------------------------
+ public static function maximumWords($mode, $version)
+ {
+ if($mode == QR_MODE_STRUCTURE)
+ return 3;
+
+ if($version <= 9) {
+ $l = 0;
+ } else if($version <= 26) {
+ $l = 1;
+ } else {
+ $l = 2;
+ }
+
+ $bits = self::$lengthTableBits[$mode][$l];
+ $words = (1 << $bits) - 1;
+
+ if($mode == QR_MODE_KANJI) {
+ $words *= 2; // the number of bytes is required
+ }
+
+ return $words;
+ }
+
+ // Error correction code -----------------------------------------------
+ // Table of the error correction code (Reed-Solomon block)
+ // See Table 12-16 (pp.30-36), JIS X0510:2004.
+
+ public static $eccTable = array(
+ array(array( 0, 0), array( 0, 0), array( 0, 0), array( 0, 0)),
+ array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)), // 1
+ array(array( 1, 0), array( 1, 0), array( 1, 0), array( 1, 0)),
+ array(array( 1, 0), array( 1, 0), array( 2, 0), array( 2, 0)),
+ array(array( 1, 0), array( 2, 0), array( 2, 0), array( 4, 0)),
+ array(array( 1, 0), array( 2, 0), array( 2, 2), array( 2, 2)), // 5
+ array(array( 2, 0), array( 4, 0), array( 4, 0), array( 4, 0)),
+ array(array( 2, 0), array( 4, 0), array( 2, 4), array( 4, 1)),
+ array(array( 2, 0), array( 2, 2), array( 4, 2), array( 4, 2)),
+ array(array( 2, 0), array( 3, 2), array( 4, 4), array( 4, 4)),
+ array(array( 2, 2), array( 4, 1), array( 6, 2), array( 6, 2)), //10
+ array(array( 4, 0), array( 1, 4), array( 4, 4), array( 3, 8)),
+ array(array( 2, 2), array( 6, 2), array( 4, 6), array( 7, 4)),
+ array(array( 4, 0), array( 8, 1), array( 8, 4), array(12, 4)),
+ array(array( 3, 1), array( 4, 5), array(11, 5), array(11, 5)),
+ array(array( 5, 1), array( 5, 5), array( 5, 7), array(11, 7)), //15
+ array(array( 5, 1), array( 7, 3), array(15, 2), array( 3, 13)),
+ array(array( 1, 5), array(10, 1), array( 1, 15), array( 2, 17)),
+ array(array( 5, 1), array( 9, 4), array(17, 1), array( 2, 19)),
+ array(array( 3, 4), array( 3, 11), array(17, 4), array( 9, 16)),
+ array(array( 3, 5), array( 3, 13), array(15, 5), array(15, 10)), //20
+ array(array( 4, 4), array(17, 0), array(17, 6), array(19, 6)),
+ array(array( 2, 7), array(17, 0), array( 7, 16), array(34, 0)),
+ array(array( 4, 5), array( 4, 14), array(11, 14), array(16, 14)),
+ array(array( 6, 4), array( 6, 14), array(11, 16), array(30, 2)),
+ array(array( 8, 4), array( 8, 13), array( 7, 22), array(22, 13)), //25
+ array(array(10, 2), array(19, 4), array(28, 6), array(33, 4)),
+ array(array( 8, 4), array(22, 3), array( 8, 26), array(12, 28)),
+ array(array( 3, 10), array( 3, 23), array( 4, 31), array(11, 31)),
+ array(array( 7, 7), array(21, 7), array( 1, 37), array(19, 26)),
+ array(array( 5, 10), array(19, 10), array(15, 25), array(23, 25)), //30
+ array(array(13, 3), array( 2, 29), array(42, 1), array(23, 28)),
+ array(array(17, 0), array(10, 23), array(10, 35), array(19, 35)),
+ array(array(17, 1), array(14, 21), array(29, 19), array(11, 46)),
+ array(array(13, 6), array(14, 23), array(44, 7), array(59, 1)),
+ array(array(12, 7), array(12, 26), array(39, 14), array(22, 41)), //35
+ array(array( 6, 14), array( 6, 34), array(46, 10), array( 2, 64)),
+ array(array(17, 4), array(29, 14), array(49, 10), array(24, 46)),
+ array(array( 4, 18), array(13, 32), array(48, 14), array(42, 32)),
+ array(array(20, 4), array(40, 7), array(43, 22), array(10, 67)),
+ array(array(19, 6), array(18, 31), array(34, 34), array(20, 61)),//40
+ );
+
+ //----------------------------------------------------------------------
+ // CACHEABLE!!!
+
+ public static function getEccSpec($version, $level, array &$spec)
+ {
+ if (count($spec) < 5) {
+ $spec = array(0,0,0,0,0);
+ }
+
+ $b1 = self::$eccTable[$version][$level][0];
+ $b2 = self::$eccTable[$version][$level][1];
+ $data = self::getDataLength($version, $level);
+ $ecc = self::getECCLength($version, $level);
+
+ if($b2 == 0) {
+ $spec[0] = $b1;
+ $spec[1] = (int)($data / $b1);
+ $spec[2] = (int)($ecc / $b1);
+ $spec[3] = 0;
+ $spec[4] = 0;
+ } else {
+ $spec[0] = $b1;
+ $spec[1] = (int)($data / ($b1 + $b2));
+ $spec[2] = (int)($ecc / ($b1 + $b2));
+ $spec[3] = $b2;
+ $spec[4] = $spec[1] + 1;
+ }
+ }
+
+ // Alignment pattern ---------------------------------------------------
+
+ // Positions of alignment patterns.
+ // This array includes only the second and the third position of the
+ // alignment patterns. Rest of them can be calculated from the distance
+ // between them.
+
+ // See Table 1 in Appendix E (pp.71) of JIS X0510:2004.
+
+ public static $alignmentPattern = array(
+ array( 0, 0),
+ array( 0, 0), array(18, 0), array(22, 0), array(26, 0), array(30, 0), // 1- 5
+ array(34, 0), array(22, 38), array(24, 42), array(26, 46), array(28, 50), // 6-10
+ array(30, 54), array(32, 58), array(34, 62), array(26, 46), array(26, 48), //11-15
+ array(26, 50), array(30, 54), array(30, 56), array(30, 58), array(34, 62), //16-20
+ array(28, 50), array(26, 50), array(30, 54), array(28, 54), array(32, 58), //21-25
+ array(30, 58), array(34, 62), array(26, 50), array(30, 54), array(26, 52), //26-30
+ array(30, 56), array(34, 60), array(30, 58), array(34, 62), array(30, 54), //31-35
+ array(24, 50), array(28, 54), array(32, 58), array(26, 54), array(30, 58), //35-40
+ );
+
+
+ /** --------------------------------------------------------------------
+ * Put an alignment marker.
+ * @param frame
+ * @param width
+ * @param ox,oy center coordinate of the pattern
+ */
+ public static function putAlignmentMarker(array &$frame, $ox, $oy)
+ {
+ $finder = array(
+ "\xa1\xa1\xa1\xa1\xa1",
+ "\xa1\xa0\xa0\xa0\xa1",
+ "\xa1\xa0\xa1\xa0\xa1",
+ "\xa1\xa0\xa0\xa0\xa1",
+ "\xa1\xa1\xa1\xa1\xa1"
+ );
+
+ $yStart = $oy-2;
+ $xStart = $ox-2;
+
+ for($y=0; $y<5; $y++) {
+ QRstr::set($frame, $xStart, $yStart+$y, $finder[$y]);
+ }
+ }
+
+ //----------------------------------------------------------------------
+ public static function putAlignmentPattern($version, &$frame, $width)
+ {
+ if($version < 2)
+ return;
+
+ $d = self::$alignmentPattern[$version][1] - self::$alignmentPattern[$version][0];
+ if($d < 0) {
+ $w = 2;
+ } else {
+ $w = (int)(($width - self::$alignmentPattern[$version][0]) / $d + 2);
+ }
+
+ if($w * $w - 3 == 1) {
+ $x = self::$alignmentPattern[$version][0];
+ $y = self::$alignmentPattern[$version][0];
+ self::putAlignmentMarker($frame, $x, $y);
+ return;
+ }
+
+ $cx = self::$alignmentPattern[$version][0];
+ for($x=1; $x<$w - 1; $x++) {
+ self::putAlignmentMarker($frame, 6, $cx);
+ self::putAlignmentMarker($frame, $cx, 6);
+ $cx += $d;
+ }
+
+ $cy = self::$alignmentPattern[$version][0];
+ for($y=0; $y<$w-1; $y++) {
+ $cx = self::$alignmentPattern[$version][0];
+ for($x=0; $x<$w-1; $x++) {
+ self::putAlignmentMarker($frame, $cx, $cy);
+ $cx += $d;
+ }
+ $cy += $d;
+ }
+ }
+
+ // Version information pattern -----------------------------------------
+
+ // Version information pattern (BCH coded).
+ // See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
+
+ // size: [QRSPEC_VERSION_MAX - 6]
+
+ public static $versionPattern = array(
+ 0x07c94, 0x085bc, 0x09a99, 0x0a4d3, 0x0bbf6, 0x0c762, 0x0d847, 0x0e60d,
+ 0x0f928, 0x10b78, 0x1145d, 0x12a17, 0x13532, 0x149a6, 0x15683, 0x168c9,
+ 0x177ec, 0x18ec4, 0x191e1, 0x1afab, 0x1b08e, 0x1cc1a, 0x1d33f, 0x1ed75,
+ 0x1f250, 0x209d5, 0x216f0, 0x228ba, 0x2379f, 0x24b0b, 0x2542e, 0x26a64,
+ 0x27541, 0x28c69
+ );
+
+ //----------------------------------------------------------------------
+ public static function getVersionPattern($version)
+ {
+ if($version < 7 || $version > QRSPEC_VERSION_MAX)
+ return 0;
+
+ return self::$versionPattern[$version -7];
+ }
+
+ // Format information --------------------------------------------------
+ // See calcFormatInfo in tests/test_qrspec.c (orginal qrencode c lib)
+
+ public static $formatInfo = array(
+ array(0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976),
+ array(0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0),
+ array(0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed),
+ array(0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b)
+ );
+
+ public static function getFormatInfo($mask, $level)
+ {
+ if($mask < 0 || $mask > 7)
+ return 0;
+
+ if($level < 0 || $level > 3)
+ return 0;
+
+ return self::$formatInfo[$level][$mask];
+ }
+
+ // Frame ---------------------------------------------------------------
+ // Cache of initial frames.
+
+ public static $frames = array();
+
+ /** --------------------------------------------------------------------
+ * Put a finder pattern.
+ * @param frame
+ * @param width
+ * @param ox,oy upper-left coordinate of the pattern
+ */
+ public static function putFinderPattern(&$frame, $ox, $oy)
+ {
+ $finder = array(
+ "\xc1\xc1\xc1\xc1\xc1\xc1\xc1",
+ "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
+ "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
+ "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
+ "\xc1\xc0\xc1\xc1\xc1\xc0\xc1",
+ "\xc1\xc0\xc0\xc0\xc0\xc0\xc1",
+ "\xc1\xc1\xc1\xc1\xc1\xc1\xc1"
+ );
+
+ for($y=0; $y<7; $y++) {
+ QRstr::set($frame, $ox, $oy+$y, $finder[$y]);
+ }
+ }
+
+ //----------------------------------------------------------------------
+ public static function createFrame($version)
+ {
+ $width = self::$capacity[$version][QRCAP_WIDTH];
+ $frameLine = str_repeat ("\0", $width);
+ $frame = array_fill(0, $width, $frameLine);
+
+ // Finder pattern
+ self::putFinderPattern($frame, 0, 0);
+ self::putFinderPattern($frame, $width - 7, 0);
+ self::putFinderPattern($frame, 0, $width - 7);
+
+ // Separator
+ $yOffset = $width - 7;
+
+ for($y=0; $y<7; $y++) {
+ $frame[$y][7] = "\xc0";
+ $frame[$y][$width - 8] = "\xc0";
+ $frame[$yOffset][7] = "\xc0";
+ $yOffset++;
+ }
+
+ $setPattern = str_repeat("\xc0", 8);
+
+ QRstr::set($frame, 0, 7, $setPattern);
+ QRstr::set($frame, $width-8, 7, $setPattern);
+ QRstr::set($frame, 0, $width - 8, $setPattern);
+
+ // Format info
+ $setPattern = str_repeat("\x84", 9);
+ QRstr::set($frame, 0, 8, $setPattern);
+ QRstr::set($frame, $width - 8, 8, $setPattern, 8);
+
+ $yOffset = $width - 8;
+
+ for($y=0; $y<8; $y++,$yOffset++) {
+ $frame[$y][8] = "\x84";
+ $frame[$yOffset][8] = "\x84";
+ }
+
+ // Timing pattern
+
+ for($i=1; $i<$width-15; $i++) {
+ $frame[6][7+$i] = chr(0x90 | ($i & 1));
+ $frame[7+$i][6] = chr(0x90 | ($i & 1));
+ }
+
+ // Alignment pattern
+ self::putAlignmentPattern($version, $frame, $width);
+
+ // Version information
+ if($version >= 7) {
+ $vinf = self::getVersionPattern($version);
+
+ $v = $vinf;
+
+ for($x=0; $x<6; $x++) {
+ for($y=0; $y<3; $y++) {
+ $frame[($width - 11)+$y][$x] = chr(0x88 | ($v & 1));
+ $v = $v >> 1;
+ }
+ }
+
+ $v = $vinf;
+ for($y=0; $y<6; $y++) {
+ for($x=0; $x<3; $x++) {
+ $frame[$y][$x+($width - 11)] = chr(0x88 | ($v & 1));
+ $v = $v >> 1;
+ }
+ }
+ }
+
+ // and a little bit...
+ $frame[$width - 8][8] = "\x81";
+
+ return $frame;
+ }
+
+ //----------------------------------------------------------------------
+ public static function debug($frame, $binary_mode = false)
+ {
+ if ($binary_mode) {
+
+ foreach ($frame as &$frameLine) {
+ $frameLine = join('<span class="m"> </span>', explode('0', $frameLine));
+ $frameLine = join('██', explode('1', $frameLine));
+ }
+
+ ?>
+ <style>
+ .m { background-color: white; }
+ </style>
+ <?php
+ echo '<pre><tt><br/ ><br/ ><br/ > ';
+ echo join("<br/ > ", $frame);
+ echo '</tt></pre><br/ ><br/ ><br/ ><br/ ><br/ ><br/ >';
+
+ } else {
+
+ foreach ($frame as &$frameLine) {
+ $frameLine = join('<span class="m"> </span>', explode("\xc0", $frameLine));
+ $frameLine = join('<span class="m">▒</span>', explode("\xc1", $frameLine));
+ $frameLine = join('<span class="p"> </span>', explode("\xa0", $frameLine));
+ $frameLine = join('<span class="p">▒</span>', explode("\xa1", $frameLine));
+ $frameLine = join('<span class="s">◇</span>', explode("\x84", $frameLine)); //format 0
+ $frameLine = join('<span class="s">◆</span>', explode("\x85", $frameLine)); //format 1
+ $frameLine = join('<span class="x">☢</span>', explode("\x81", $frameLine)); //special bit
+ $frameLine = join('<span class="c"> </span>', explode("\x90", $frameLine)); //clock 0
+ $frameLine = join('<span class="c">◷</span>', explode("\x91", $frameLine)); //clock 1
+ $frameLine = join('<span class="f"> </span>', explode("\x88", $frameLine)); //version
+ $frameLine = join('<span class="f">▒</span>', explode("\x89", $frameLine)); //version
+ $frameLine = join('♦', explode("\x01", $frameLine));
+ $frameLine = join('⋅', explode("\0", $frameLine));
+ }
+
+ ?>
+ <style>
+ .p { background-color: yellow; }
+ .m { background-color: #00FF00; }
+ .s { background-color: #FF0000; }
+ .c { background-color: aqua; }
+ .x { background-color: pink; }
+ .f { background-color: gold; }
+ </style>
+ <?php
+ echo "<pre><tt>";
+ echo join("<br/ >", $frame);
+ echo "</tt></pre>";
+
+ }
+ }
+
+ //----------------------------------------------------------------------
+ public static function serial($frame)
+ {
+ return gzcompress(join("\n", $frame), 9);
+ }
+
+ //----------------------------------------------------------------------
+ public static function unserial($code)
+ {
+ return explode("\n", gzuncompress($code));
+ }
+
+ //----------------------------------------------------------------------
+ public static function newFrame($version)
+ {
+ if($version < 1 || $version > QRSPEC_VERSION_MAX)
+ return null;
+
+ if(!isset(self::$frames[$version])) {
+
+ $fileName = QR_CACHE_DIR.'frame_'.$version.'.dat';
+
+ if (QR_CACHEABLE) {
+ if (file_exists($fileName)) {
+ self::$frames[$version] = self::unserial(file_get_contents($fileName));
+ } else {
+ self::$frames[$version] = self::createFrame($version);
+ file_put_contents($fileName, self::serial(self::$frames[$version]));
+ }
+ } else {
+ self::$frames[$version] = self::createFrame($version);
+ }
+ }
+
+ if(is_null(self::$frames[$version]))
+ return null;
+
+ return self::$frames[$version];
+ }
+
+ //----------------------------------------------------------------------
+ public static function rsBlockNum($spec) { return $spec[0] + $spec[3]; }
+ public static function rsBlockNum1($spec) { return $spec[0]; }
+ public static function rsDataCodes1($spec) { return $spec[1]; }
+ public static function rsEccCodes1($spec) { return $spec[2]; }
+ public static function rsBlockNum2($spec) { return $spec[3]; }
+ public static function rsDataCodes2($spec) { return $spec[4]; }
+ public static function rsEccCodes2($spec) { return $spec[2]; }
+ public static function rsDataLength($spec) { return ($spec[0] * $spec[1]) + ($spec[3] * $spec[4]); }
+ public static function rsEccLength($spec) { return ($spec[0] + $spec[3]) * $spec[2]; }
+
+ }
\ No newline at end of file |