=3; $rows--) { $pad = $rows*$cols - $len; if($pad<0) break; if($pad<$padding) { $padding = $pad; $padding_for = array($rows, $cols); $padding_factor = abs($rows*MODULE_HEIGHT - (2+$cols)*17*MODULE_WIDTH); } elseif($pad==$padding && abs($rows*MODULE_HEIGHT - (2+$cols)*17*MODULE_WIDTH)<$padding_factor) { $padding_for = array($rows, $cols); $padding_factor = abs($rows*MODULE_HEIGHT - (2+$cols)*17*MODULE_WIDTH); } } } return array($padding, $padding_for); } // Compute Reed-Solomon error correction codewords function reed_solomon($data, $s) { $factors = array( array( 27, 917), array( 522, 568, 723, 809), array( 237, 308, 436, 284, 646, 653, 428, 379), array( 274, 562, 232, 755, 599, 524, 801, 132, 295, 116, 442, 428, 295, 42, 176, 65), array( 361, 575, 922, 525, 176, 586, 640, 321, 536, 742, 677, 742, 687, 284, 193, 517, 273, 494, 263, 147, 593, 800, 571, 320, 803, 133, 231, 390, 685, 330, 63, 410), array( 539, 422 , 6, 93, 862, 771, 453, 106, 610, 287, 107, 505, 733, 877, 381, 612, 723, 476, 462, 172, 430, 609, 858, 822, 543, 376, 511, 400, 672, 762, 283, 184, 440, 35, 519, 31, 460, 594, 225, 535, 517, 352, 605, 158, 651, 201, 488, 502, 648, 733, 717, 83, 404, 97, 280, 771, 840, 629, 4, 381, 843, 623, 264, 543), array( 521, 310, 864, 547, 858, 580, 296, 379, 53, 779, 897, 444, 400, 925, 749, 415, 822, 93, 217, 208, 928, 244, 583, 620, 246, 148, 447, 631, 292, 908, 490, 704, 516, 258, 457, 907, 594, 723, 674, 292, 272, 96, 684, 432, 686, 606, 860, 569, 193, 219, 129, 186, 236, 287, 192, 775, 278, 173, 40, 379, 712, 463, 646, 776, 171, 491, 297, 763, 156, 732, 95, 270, 447, 90, 507, 48, 228, 821, 808, 898, 784, 663, 627, 378, 382, 262, 380, 602, 754, 336, 89, 614, 87, 432, 670, 616, 157, 374, 242, 726, 600, 269, 375, 898, 845, 454, 354, 130, 814, 587, 804, 34, 211, 330, 539, 297, 827, 865, 37, 517, 834, 315, 550, 86, 801, 4, 108, 539), array( 524, 894, 75, 766, 882, 857, 74, 204, 82, 586, 708, 250, 905, 786, 138, 720, 858, 194, 311, 913, 275, 190, 375, 850, 438, 733, 194, 280, 201, 280, 828, 757, 710, 814, 919, 89, 68, 569, 11, 204, 796, 605, 540, 913, 801, 700, 799, 137, 439, 418, 592, 668, 353, 859, 370, 694, 325, 240, 216, 257, 284, 549, 209, 884, 315, 70, 329, 793, 490, 274, 877, 162, 749, 812, 684, 461, 334, 376, 849, 521, 307, 291, 803, 712, 19, 358, 399, 908, 103, 511, 51, 8, 517, 225, 289, 470, 637, 731, 66, 255, 917, 269, 463, 830, 730, 433, 848, 585, 136, 538, 906, 90, 2, 290, 743, 199, 655, 903, 329, 49, 802, 580, 355, 588, 188, 462, 10, 134, 628, 320, 479, 130, 739, 71, 263, 318, 374, 601, 192, 605, 142, 673, 687, 234, 722, 384, 177, 752, 607, 640, 455, 193, 689, 707, 805, 641, 48, 60, 732, 621, 895, 544, 261, 852, 655, 309, 697, 755, 756, 60, 231, 773, 434, 421, 726, 528, 503, 118, 49, 795, 32, 144, 500, 238, 836, 394, 280, 566, 319, 9, 647, 550, 73, 914, 342, 126, 32, 681, 331, 792, 620, 60, 609, 441, 180, 791, 893, 754, 605, 383, 228, 749, 760, 213, 54, 297, 134, 54, 834, 299, 922, 191, 910, 532, 609, 829, 189, 20, 167, 29, 872, 449, 83, 402, 41, 656, 505, 579, 481, 173, 404, 251, 688, 95, 497, 555, 642, 543, 307, 159, 924, 558, 648, 55, 497, 10), array( 352, 77, 373, 504, 35, 599, 428, 207, 409, 574, 118, 498, 285, 380, 350, 492, 197, 265, 920, 155, 914, 299, 229, 643, 294, 871, 306, 88, 87, 193, 352, 781, 846, 75, 327, 520, 435, 543, 203, 666, 249, 346, 781, 621, 640, 268, 794, 534, 539, 781, 408, 390, 644, 102, 476, 499, 290, 632, 545, 37, 858, 916, 552, 41, 542, 289, 122, 272, 383, 800, 485, 98, 752, 472, 761, 107, 784, 860, 658, 741, 290, 204, 681, 407, 855, 85, 99, 62, 482, 180, 20, 297, 451, 593, 913, 142, 808, 684, 287, 536, 561, 76, 653, 899, 729, 567, 744, 390, 513, 192, 516, 258, 240, 518, 794, 395, 768, 848, 51, 610, 384, 168, 190, 826, 328, 596, 786, 303, 570, 381, 415, 641, 156, 237, 151, 429, 531, 207, 676, 710, 89, 168, 304, 402, 40, 708, 575, 162, 864, 229, 65, 861, 841, 512, 164, 477, 221, 92, 358, 785, 288, 357, 850, 836, 827, 736, 707, 94, 8, 494, 114, 521, 2, 499, 851, 543, 152, 729, 771, 95, 248, 361, 578, 323, 856, 797, 289, 51, 684, 466, 533, 820, 669, 45, 902, 452, 167, 342, 244, 173, 35, 463, 651, 51, 699, 591, 452, 578, 37, 124, 298, 332, 552, 43, 427, 119, 662, 777, 475, 850, 764, 364, 578, 911, 283, 711, 472, 420, 245, 288, 594, 394, 511, 327, 589, 777, 699, 688, 43, 408, 842, 383, 721, 521, 560, 644, 714, 559, 62, 145, 873, 663, 713, 159, 672, 729, 624, 59, 193, 417, 158, 209, 563, 564, 343, 693, 109, 608, 563, 365, 181, 772, 677, 310, 248, 353, 708, 410, 579, 870, 617, 841, 632, 860, 289, 536, 35, 777, 618, 586, 424, 833, 77, 597, 346, 269, 757, 632, 695, 751, 331, 247, 184, 45, 787, 680, 18, 66, 407, 369, 54, 492, 228, 613, 830, 922, 437, 519, 644, 905, 789, 420, 305, 441, 207, 300, 892, 827, 141, 537, 381, 662, 513, 56, 252, 341, 242, 797, 838, 837, 720, 224, 307, 631, 61, 87, 560, 310, 756, 665, 397, 808, 851, 309, 473, 795, 378, 31, 647, 915, 459, 806, 590, 731, 425, 216, 548, 249, 321, 881, 699, 535, 673, 782, 210, 815, 905, 303, 843, 922, 281, 73, 469, 791, 660, 162, 498, 308, 155, 422, 907, 817, 187, 62, 16, 425, 535, 336, 286, 437, 375, 273, 610, 296, 183, 923, 116, 667, 751, 353, 62, 366, 691, 379, 687, 842, 37, 357, 720, 742, 330, 5, 39, 923, 311, 424, 242, 749, 321, 54, 669, 316, 342, 299, 534, 105, 667, 488, 640, 672, 576, 540, 316, 486, 721, 610, 46, 656, 447, 171, 616, 464, 190, 531, 297, 321, 762, 752, 533, 175, 134, 14, 381, 433, 717, 45, 111, 20, 596, 284, 736, 138, 646, 411, 877, 669, 141, 919, 45, 780, 407, 164, 332, 899, 165, 726, 600, 325, 498, 655, 357, 752, 768, 223, 849, 647, 63, 310, 863, 251, 366, 304, 282, 738, 675, 410, 389, 244, 31, 121, 303, 263), ); $m = count($data); $k = bcpow(2, $s+1, 0); $c = array_fill(0, $k, 0); $t = 0; for($i=0; $i<$m; $i++) { $t = ($data[$i] + $c[0]) % 929; for($j=$k-1; $j>=0; $j--) { if($j==0) { $c[$k-$j-1] = ( 929 - (($t * $factors[$s][$j]) % 929) ) % 929; } else { $c[$k-$j-1] = ( $c[$k-$j] + 929 - (($t * $factors[$s][$j]) % 929) ) % 929; } } } for($j=0; $j<$k; $j++) { if($c[$j] != 0) { $c[$j] = 929 - $c[$j]; } } return $c; } $special_bars = array( 'start' => '11111111010101000', 'stop' => '111111101000101001', ); $text_mode = array( 'A' => array('upper', 0), 'B' => array('upper', 1), 'C' => array('upper', 2), 'D' => array('upper', 3), 'E' => array('upper', 4), 'F' => array('upper', 5), 'G' => array('upper', 6), 'H' => array('upper', 7), 'I' => array('upper', 8), 'J' => array('upper', 9), 'K' => array('upper', 10), 'L' => array('upper', 11), 'M' => array('upper', 12), 'N' => array('upper', 13), 'O' => array('upper', 14), 'P' => array('upper', 15), 'Q' => array('upper', 16), 'R' => array('upper', 17), 'S' => array('upper', 18), 'T' => array('upper', 19), 'U' => array('upper', 20), 'V' => array('upper', 21), 'W' => array('upper', 22), 'X' => array('upper', 23), 'Y' => array('upper', 24), 'Z' => array('upper', 25), ' ' => array(array('upper', 'lower', 'mixed'), 26), 'a' => array('lower', 0), 'b' => array('lower', 1), 'c' => array('lower', 2), 'd' => array('lower', 3), 'e' => array('lower', 4), 'f' => array('lower', 5), 'g' => array('lower', 6), 'h' => array('lower', 7), 'i' => array('lower', 8), 'j' => array('lower', 9), 'k' => array('lower', 10), 'l' => array('lower', 11), 'm' => array('lower', 12), 'n' => array('lower', 13), 'o' => array('lower', 14), 'p' => array('lower', 15), 'q' => array('lower', 16), 'r' => array('lower', 17), 's' => array('lower', 18), 't' => array('lower', 19), 'u' => array('lower', 20), 'v' => array('lower', 21), 'w' => array('lower', 22), 'x' => array('lower', 23), 'y' => array('lower', 24), 'z' => array('lower', 25), ';' => array('punct', 0), '<' => array('punct', 1), '>' => array('punct', 2), '@' => array('punct', 3), '[' => array('punct', 4), '\\' => array('punct', 5), ']' => array('punct', 6), '_' => array('punct', 7), '`' => array('punct', 8), '~' => array('punct', 9), '!' => array('punct', 10), "\r" => array(array('punct', 'mixed'), 11), "\t" => array(array('punct', 'mixed'), 12), ',' => array(array('punct', 'mixed'), 13), ':' => array(array('punct', 'mixed'), 14), "\n" => array('punct', 15), '-' => array(array('punct', 'mixed'), 16), '.' => array(array('punct', 'mixed'), 17), '$' => array(array('punct', 'mixed'), 18), '/' => array(array('punct', 'mixed'), 19), '\'' => array('punct', 20), '|' => array('punct', 21), '*' => array('punct', 22), '(' => array('punct', 23), ')' => array('punct', 24), '?' => array('punct', 25), '{' => array('punct', 26), '}' => array('punct', 27), '\'' => array('punct', 28), '0' => array('mixed', 0), '1' => array('mixed', 1), '2' => array('mixed', 2), '3' => array('mixed', 3), '4' => array('mixed', 4), '5' => array('mixed', 5), '6' => array('mixed', 6), '7' => array('mixed', 7), '8' => array('mixed', 8), '9' => array('mixed', 9), '&' => array('mixed', 10), '#' => array('mixed', 15), '+' => array('mixed', 20), '%' => array('mixed', 21), '*' => array('mixed', 22), '=' => array('mixed', 23), '^' => array('mixed', 24), 'upper' => array('lower' => 27, 'punct' => 25, 'mixed' => 28), 'lower' => array('upper' => 27, 'mixed' => 27), 'mixed' => array('upper' => 28, 'lower' => 28), 'punct' => array('mixed' => 25), 'punct_next' => array('upper' => 29, 'lower' => 29, 'mixed' => 29), ); // Encodes text function t_cws($text) { global $text_mode; $text = str_split($text); foreach($text as &$char) { $char = $text_mode[$char]; $char[0] = (array)$char[0]; } unset($char); $return = array(900); $tmp = array(); $tmp_type = 'upper'; while(isset($text[0])) { $char = array_shift($text); if(!in_array($tmp_type, $char[0])) { if($char[0]=='punct') { $tmp[] = 29; } elseif(isset($text[0]) && $mode=array_intersect($char[0], $text[0][0])) { $mode = array_shift($mode); if(isset($text_mode[$mode][$tmp_type])) { $tmp[] = $text_mode[$mode][$tmp_type]; $tmp_type = $mode; } elseif(isset($text_mode[$mode.'_next']) && isset($text_mode[$mode.'_next'][$tmp_type])) { $tmp[] = $text_mode[$mode.'_next'][$tmp_type]; } else { die('Unable to change mode from '.$tmp_type.' to '.$mode.'\n'); } } else { $mode = array_shift($char[0]); if(isset($text_mode[$mode.'_next']) && isset($text_mode[$mode.'_next'][$tmp_type])) { $tmp[] = $text_mode[$mode.'_next'][$tmp_type]; } elseif(isset($text_mode[$tmp_type]) && isset($text_mode[$tmp_type][$mode])) { $tmp[] = $text_mode[$mode][$tmp_type]; $tmp_type = $mode; } else { die('Unable to change mode from '.$tmp_type.' to '.$mode.'\n'); } } } $tmp[] = $char[1]; } if(count($tmp)%2==1) { $tmp[] = 29; } while($tmp) { $return[] = array_shift($tmp)*30 + array_shift($tmp); } return $return; } // Encodes binary string function b_cws($bytecode) { $len = strlen($bytecode); $bytecode = str_split($bytecode); $return = array(); foreach($bytecode as &$byte) $byte = (string)ord($byte); while(count($bytecode)>=6) { $intval = '0'; $subreturn = array(); for($i=5; $i>=0; $i--) { $intval = bcadd($intval, bcmul(array_shift($bytecode), bcpow(256, $i, 0), 0), 0); } for($i=0; $i<5; $i++) { $subreturn[] = (int)bcmod($intval, '900'); $intval = bcdiv($intval, '900', 0); } $return = array_merge($return, array_reverse($subreturn)); } if(count($bytecode)) { // Type: byte // number od encoded bytes is NOT a multiple of 6 array_unshift($return, 901); } else { // Type: byte, number of encoded bytes is a multiple of 6 array_unshift($return, 924); } $return = array_merge($return, $bytecode); return $return; } // Encodes number function n_cws($number) { $number = str_split($number, 44); $return = array(902); while($number) { $subreturn = array(); $intval = '1'.array_shift($number); for($i=0; $i<15; $i++) { $subreturn[] = (int)bcmod($intval, '900'); $intval = bcdiv($intval, '900', 0); if($intval==0) break; } $return = array_merge($return, array_reverse($subreturn)); } return $return; } function array_unchunk($array) { return call_user_func_array('array_merge', $array); } // Divide data into blocks of the same type $code = str_split($code); $blocks = array(); $types = array(); $tmp = ''; $tmp_type = ''; while(count($code)) { $char = array_shift($code); if(ctype_digit($char)){ if($tmp_type != 'n' && $tmp) { $blocks[] = $tmp; $types[] = $tmp_type; $tmp = ''; } $tmp_type = 'n'; $tmp .= $char; } elseif((ord($char)>=32 && ord($char)<127) || $char=="\r" || $char=="\n" || $char=="\t") { if($tmp_type != 't' && $tmp) { $blocks[] = $tmp; $types[] = $tmp_type; $tmp = ''; } $tmp_type = 't'; $tmp .= $char; } else { if($tmp_type != 'b' && $tmp) { $blocks[] = $tmp; $types[] = $tmp_type; $tmp = ''; } $tmp_type = 'b'; $tmp .= $char; } } if($tmp) { $blocks[] = $tmp; $types[] = $tmp_type; $tmp = ''; } unset($code, $char, $tmp, $tmp_type); // Compact it $i = -1; $tmp_type = ''; foreach($blocks as $num => $data) { if($tmp_type == 'b' && (($types[$num]=='t' && strlen($data)<4) || ($types[$num]=='n' && strlen($data)<4))) { $blocks[$i] .= $data; } elseif($tmp_type == 't' && ($types[$num]=='n' && strlen($data)<4)) { $blocks[$i] .= $data; } elseif($types[$num] != $tmp_type) { $blocks[++$i] = $data; $tmp_type = $types[$i] = $types[$num]; } else { $blocks[$i] .= $data; } } $blocks = array_slice($blocks, 0, $i+1); $types = array_slice($types, 0, $i+1); unset($i, $tmp_type, $num, $data); // Encode data into corewords foreach($blocks as $num => &$data) { $data = call_user_func($types[$num].'_cws', $data); } unset($num, $data, $types); $blocks = array_unchunk($blocks); $m = count($blocks); if($m<=40) $s = 2; elseif($m<=160) $s = 3; elseif($m<=320) $s = 4; elseif($m<=863) $s = 5; elseif($m<=925) $s = 0; else die('Too many data blocks: '.$m); // Compute size of the barcode $size = square(count($blocks)+bcpow(2, $s+1, 0)); $padding = $size[0]; $size = $size[1]; array_unshift($blocks, 1+count($blocks)+$padding); if($padding) { $blocks = array_merge($blocks, array_fill(0, $padding, 900)); } $blocks = array_merge($blocks, reed_solomon($blocks, $s)); unset($m, $padding); // Corewords representation tables // To get a binary form use: decbin(intval($var, 36)) $table1=array('2ksg','2oz4','2r24','2km8','2ovs','2r0e','2bwg','2kj4','2bts','1uf4','2bsg','1ue8','2cw0','2l0w','2p30','2cps', '2kxk','2p1a','1w3k','2cmo','1w0w','1x34','2d4g','2l4s','1www','2d14','2l32','1wts','2czg','1xbk','2d8c','1x88','2d6m','1xfg', '2r5m','2k80','2ooo','2qwu','2b40','2k4w','2on0','2b1c','2k3c','1su8','2b00','2k2k','1stc','2azc','1ssw','2bj4','2kc8','2oqm', '1tq8','2bg0','2kak','1tnk','2beg','2k9q','1tm8','2bdo','1u5c','2bnc','2ke6','1u28','2blo','1u0o','2bku','1u9k','2bpa','1u7w', '1u72','2aps','2jxs','2ojg','2an4','2jw8','2oim','1s1s','2als','2jvg','1s0w','2al4','1s0g','1s08','1sjk','2auo','2jzw','1sgw', '2at4','2jz2','1sfk','2asc','1sew','1sek','1sog','2aws','1smw','2avy','1sm4','1sqk','2ag0','2jso','2ogu','1rnk','2aeo','2jrw', '1rmo','2ae0','2jri','1rm8','2ado','1rm0','2adi','1rvk','2aig','2jtq','1ru8','2aho','1rtk','2aha','1rt8','1rt2','2aji','1rwu', '1rgg','2ab4','2jq4','1rfk','2aag','2jpq','1rf4','2aa4','1rew','2a9y','1res','1rjk','1riw','1rik','1rc0','2jou','2a8c','2a86', '1rb6','2in4','2nw8','2qim','27y8','2ik0','2nuk','27vk','2iig','2ntq','1mio','27u8','1mhs','28dc','2irc','2ny6','1neo','28a8', '2ipo','1nc0','288o','1nao','1na0','1nts','28hk','2ita','1nqo','28fw','1np4','1noc','1ny0','28ji','1nwc','1nzy','2ls0','2pgw', '2rb0','2lpc','2pfc','2ra6','2e68','2lo0','2pek','2e5c','2lnc','2pe6','2e4w','2ln0','27k0','2icw','2nr0','2eo0','27hc','2ibc', '2nq6','2elc','2lvc','2pi6','1zy8','1lpc','27fc','2ia6','1zxc','2ejc','1zww','1m80','27ow','2if0','20g0','1m5c','27nc','2ie6', '20dc','2erc','2ly6','20c0','1m3c','20bc','1mcw','27r0','20kw','1mbc','27q6','20jc','2eu6','20ik','1mf0','20n0','1me6','20m6', '2li8','2pbs','2r8e','2ds0','2lgw','2pb0','2dr4','2lg8','2pam','2dqo','2lfw','2dqg','2dqc','27a8','2i7s','2noe','2e00','278w', 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36)); } foreach($table3 as &$char) { $char = decbin(intval($char, 36)); } $bars = array(); $block = 0; for($row=0; $row<$size[0]; $row++) { $bars[$row] = $special_bars['start']; if($row%3==0) { $bars[$row] .= $table1[floor($row/3)*30 + floor(($size[0]-1)/3)]; } elseif($row%3==1) { $bars[$row] .= $table2[floor($row/3)*30 + $s*3 + (($size[0]-1)%3)]; } elseif($row%3==2) { $bars[$row] .= $table3[floor($row/3)*30 + ($size[1]-1)]; } for($col=0; $col<$size[1]; $col++) { $cw = $blocks[$block++]; if($row%3==0) { $bars[$row] .= $table1[$cw]; } elseif($row%3==1) { $bars[$row] .= $table2[$cw]; } elseif($row%3==2) { $bars[$row] .= $table3[$cw]; } } if($row%3==0) { $bars[$row] .= $table1[floor($row/3)*30 + ($size[1]-1)]; } elseif($row%3==1) { $bars[$row] .= $table2[floor($row/3)*30 + floor(($size[0]-1)/3)]; } elseif($row%3==2) { $bars[$row] .= $table3[floor($row/3)*30 + $s*3 + (($size[0]-1)%3)]; } $bars[$row] .= $special_bars['stop']; } unset($cw, $blocks, $table1, $table2, $table3); $img = imagecreate(strlen($bars[0])*MODULE_WIDTH, count($bars)*MODULE_HEIGHT); $white = imagecolorallocate($img, 255, 255, 255); $black = imagecolorallocate($img, 0, 0, 0); $top = 0; foreach($bars as $bar) { foreach(str_split($bar) as $i => $j) { if($j == '1') { imagefilledrectangle($img, $i*MODULE_WIDTH, $top, $i*MODULE_WIDTH+MODULE_WIDTH-1, $top+MODULE_HEIGHT-1, $black); } } $top += MODULE_HEIGHT; } header('Content-Type: image/gif'); imagegif($img); ?>