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phpOMS/Utils/Barcode/QR.php
Dennis Eichhorn f1a64bdc64 auto fixes + some impl.
2024-01-26 22:54:00 +00:00

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<?php
/**
* Jingga
*
* PHP Version 8.1
*
* @package phpOMS\Utils\Barcode
* @author Nicola Asuni - Tecnick.com LTD - www.tecnick.com <info@tecnick.com>
* @copyright Copyright (C) 2010 - 2014 Nicola Asuni - Tecnick.com LTD
* @license GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
* @version 1.0.0
* @link https://jingga.app
*/
declare(strict_types=1);
namespace phpOMS\Utils\Barcode;
/**
* QR class.
*
* @package phpOMS\Utils\Barcode
* @license GNU-LGPL v3 (http://www.gnu.org/copyleft/lesser.html)
* @link https://jingga.app
* @since 1.0.0
*/
class QR extends TwoDAbstract
{
/**
* Error correction level.
*
* @var int
* @since 1.0.0
*/
public const QR_ECLEVEL_L = 0;
/**
* Error correction level.
*
* @var int
* @since 1.0.0
*/
public const QR_ECLEVEL_M = 1;
/**
* Error correction level.
*
* @var int
* @since 1.0.0
*/
public const QR_ECLEVEL_Q = 2;
/**
* Error correction level.
*
* @var int
* @since 1.0.0
*/
public const QR_ECLEVEL_H = 3;
private const QRCODEDEFS = true;
private const QR_MODE_NL = -1;
private const QR_MODE_NM = 0;
private const QR_MODE_AN = 1;
private const QR_MODE_8B = 2;
private const QR_MODE_KJ = 3;
private const QR_MODE_ST = 4;
private const QRSPEC_VERSION_MAX = 40;
private const QRSPEC_WIDTH_MAX = 177;
private const QRCAP_WIDTH = 0;
private const QRCAP_WORDS = 1;
private const QRCAP_REMINDER = 2;
private const QRCAP_EC = 3;
private const STRUCTURE_HEADER_BITS = 20;
private const MAX_STRUCTURED_SYMBOLS = 16;
private const N1 = 3;
private const N2 = 3;
private const N3 = 40;
private const N4 = 10;
private const QR_FIND_BEST_MASK = true;
private const QR_FIND_FROM_RANDOM = 2;
private const QR_DEFAULT_MASK = 2;
/**
* Alphabet-numeric convesion table.
*
* @var array
* @since 1.0.0
*/
private const AN_TABLE = [
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 44, -1, -1, -1, -1, -1,
-1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
];
/**
* Array Table of the capacity of symbols.
* See Table 1 (pp.13) and Table 12-16 (pp.30-36), JIS X0510:2004.
*
* @var array
* @since 1.0.0
*/
private const CAPACITY = [
[0, 0, 0, [0, 0, 0, 0]],
[21, 26, 0, [7, 10, 13, 17]], // 1
[25, 44, 7, [10, 16, 22, 28]],
[29, 70, 7, [15, 26, 36, 44]],
[33, 100, 7, [20, 36, 52, 64]],
[37, 134, 7, [26, 48, 72, 88]], // 5
[41, 172, 7, [36, 64, 96, 112]],
[45, 196, 0, [40, 72, 108, 130]],
[49, 242, 0, [48, 88, 132, 156]],
[53, 292, 0, [60, 110, 160, 192]],
[57, 346, 0, [72, 130, 192, 224]], // 10
[61, 404, 0, [80, 150, 224, 264]],
[65, 466, 0, [96, 176, 260, 308]],
[69, 532, 0, [104, 198, 288, 352]],
[73, 581, 3, [120, 216, 320, 384]],
[77, 655, 3, [132, 240, 360, 432]], // 15
[81, 733, 3, [144, 280, 408, 480]],
[85, 815, 3, [168, 308, 448, 532]],
[89, 901, 3, [180, 338, 504, 588]],
[93, 991, 3, [196, 364, 546, 650]],
[97, 1085, 3, [224, 416, 600, 700]], // 20
[101, 1156, 4, [224, 442, 644, 750]],
[105, 1258, 4, [252, 476, 690, 816]],
[109, 1364, 4, [270, 504, 750, 900]],
[113, 1474, 4, [300, 560, 810, 960]],
[117, 1588, 4, [312, 588, 870, 1050]], // 25
[121, 1706, 4, [336, 644, 952, 1110]],
[125, 1828, 4, [360, 700, 1020, 1200]],
[129, 1921, 3, [390, 728, 1050, 1260]],
[133, 2051, 3, [420, 784, 1140, 1350]],
[137, 2185, 3, [450, 812, 1200, 1440]], // 30
[141, 2323, 3, [480, 868, 1290, 1530]],
[145, 2465, 3, [510, 924, 1350, 1620]],
[149, 2611, 3, [540, 980, 1440, 1710]],
[153, 2761, 3, [570, 1036, 1530, 1800]],
[157, 2876, 0, [570, 1064, 1590, 1890]], // 35
[161, 3034, 0, [600, 1120, 1680, 1980]],
[165, 3196, 0, [630, 1204, 1770, 2100]],
[169, 3362, 0, [660, 1260, 1860, 2220]],
[173, 3532, 0, [720, 1316, 1950, 2310]],
[177, 3706, 0, [750, 1372, 2040, 2430]], // 40
];
/**
* Array Length indicator.
*
* @var array
* @since 1.0.0
*/
private const LENGTH_TABLE_BITS = [
[10, 12, 14],
[9, 11, 13],
[8, 16, 16],
[8, 10, 12],
];
/**
* Array Table of the error correction code (Reed-Solomon block).
* See Table 12-16 (pp.30-36), JIS X0510:2004.
*
* @var array
* @since 1.0.0
*/
private const ECC_TABLE = [
[[0, 0], [0, 0], [0, 0], [0, 0]],
[[1, 0], [1, 0], [1, 0], [1, 0]], // 1
[[1, 0], [1, 0], [1, 0], [1, 0]],
[[1, 0], [1, 0], [2, 0], [2, 0]],
[[1, 0], [2, 0], [2, 0], [4, 0]],
[[1, 0], [2, 0], [2, 2], [2, 2]], // 5
[[2, 0], [4, 0], [4, 0], [4, 0]],
[[2, 0], [4, 0], [2, 4], [4, 1]],
[[2, 0], [2, 2], [4, 2], [4, 2]],
[[2, 0], [3, 2], [4, 4], [4, 4]],
[[2, 2], [4, 1], [6, 2], [6, 2]], // 10
[[4, 0], [1, 4], [4, 4], [3, 8]],
[[2, 2], [6, 2], [4, 6], [7, 4]],
[[4, 0], [8, 1], [8, 4], [12, 4]],
[[3, 1], [4, 5], [11, 5], [11, 5]],
[[5, 1], [5, 5], [5, 7], [11, 7]], // 15
[[5, 1], [7, 3], [15, 2], [3, 13]],
[[1, 5], [10, 1], [1, 15], [2, 17]],
[[5, 1], [9, 4], [17, 1], [2, 19]],
[[3, 4], [3, 11], [17, 4], [9, 16]],
[[3, 5], [3, 13], [15, 5], [15, 10]], // 20
[[4, 4], [17, 0], [17, 6], [19, 6]],
[[2, 7], [17, 0], [7, 16], [34, 0]],
[[4, 5], [4, 14], [11, 14], [16, 14]],
[[6, 4], [6, 14], [11, 16], [30, 2]],
[[8, 4], [8, 13], [7, 22], [22, 13]], // 25
[[10, 2], [19, 4], [28, 6], [33, 4]],
[[8, 4], [22, 3], [8, 26], [12, 28]],
[[3, 10], [3, 23], [4, 31], [11, 31]],
[[7, 7], [21, 7], [1, 37], [19, 26]],
[[5, 10], [19, 10], [15, 25], [23, 25]], // 30
[[13, 3], [2, 29], [42, 1], [23, 28]],
[[17, 0], [10, 23], [10, 35], [19, 35]],
[[17, 1], [14, 21], [29, 19], [11, 46]],
[[13, 6], [14, 23], [44, 7], [59, 1]],
[[12, 7], [12, 26], [39, 14], [22, 41]], // 35
[[6, 14], [6, 34], [46, 10], [2, 64]],
[[17, 4], [29, 14], [49, 10], [24, 46]],
[[4, 18], [13, 32], [48, 14], [42, 32]],
[[20, 4], [40, 7], [43, 22], [10, 67]],
[[19, 6], [18, 31], [34, 34], [20, 61]], // 40
];
/**
* Array 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.
*
* @var array
* @since 1.0.0
*/
private const ALIGNMENT_PATTERN = [
[0, 0],
[0, 0], [18, 0], [22, 0], [26, 0], [30, 0], // 1- 5
[34, 0], [22, 38], [24, 42], [26, 46], [28, 50], // 6-10
[30, 54], [32, 58], [34, 62], [26, 46], [26, 48], // 11-15
[26, 50], [30, 54], [30, 56], [30, 58], [34, 62], // 16-20
[28, 50], [26, 50], [30, 54], [28, 54], [32, 58], // 21-25
[30, 58], [34, 62], [26, 50], [30, 54], [26, 52], // 26-30
[30, 56], [34, 60], [30, 58], [34, 62], [30, 54], // 31-35
[24, 50], [28, 54], [32, 58], [26, 54], [30, 58], // 35-40
];
/**
* Array Version information pattern (BCH coded).
* See Table 1 in Appendix D (pp.68) of JIS X0510:2004.
* size: [QRSPEC_VERSION_MAX - 6]
*
* @var array
* @since 1.0.0
*/
private const VERSION_PATTERN = [
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,
];
/**
* Array Format information
*
* @var array
* @since 1.0.0
*/
private const FORMAT_INFO = [
[0x77c4, 0x72f3, 0x7daa, 0x789d, 0x662f, 0x6318, 0x6c41, 0x6976],
[0x5412, 0x5125, 0x5e7c, 0x5b4b, 0x45f9, 0x40ce, 0x4f97, 0x4aa0],
[0x355f, 0x3068, 0x3f31, 0x3a06, 0x24b4, 0x2183, 0x2eda, 0x2bed],
[0x1689, 0x13be, 0x1ce7, 0x19d0, 0x0762, 0x0255, 0x0d0c, 0x083b],
];
private const PUT_ALIGNMENT_FILTER = [
"\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",
];
private const PUT_FINDER = [
"\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",
];
/**
* Version.
*
* @var int
* @since 1.0.0
*/
protected int $version = 0;
/**
* Levels of error correction. See definitions for possible values.
*
* @var int
* @since 1.0.0
*/
public int $level = self::QR_ECLEVEL_L;
/**
* Encoding mode.
*
* @var int
* @since 1.0.0
*/
protected int $hint = self::QR_MODE_8B;
/**
* Boolean flag, if true the input string will be converted to uppercase.
*
* @var bool
* @since 1.0.0
*/
protected bool $casesensitive = true;
/**
* Structured QR code (not supported yet).
*
* @var int
* @since 1.0.0
*/
protected int $structured = 0;
/**
* Mask data.
*
* @var array
* @since 1.0.0
*/
protected array $data = [];
/**
* Width.
*
* @var int
* @since 1.0.0
*/
protected int $width = 0;
/**
* Frame.
*
* @var array
* @since 1.0.0
*/
protected array $frame = [];
/**
* X position of bit.
*
* @var int
* @since 1.0.0
*/
protected int $x = 0;
/**
* Y position of bit.
*
* @var int
* @since 1.0.0
*/
protected int $y = 0;
/**
* Direction.
*
* @var int
* @since 1.0.0
*/
protected int $dir = 0;
/**
* Single bit value.
*
* @var int
* @since 1.0.0
*/
protected int $bit = 0;
/**
* Data code.
*
* @var array
* @since 1.0.0
*/
protected array $datacode = [];
/**
* Error correction code.
*
* @var array
* @since 1.0.0
*/
protected array $ecccode = [];
/**
* Blocks.
*
* @var int
*
* @since 1.0.0
*/
protected int $blocks = 0;
/**
* Reed-Solomon blocks.
*
* @var array
* @since 1.0.0
*/
protected array $rsblocks = []; //of RSblock
/**
* Counter.
*
* @var int
* @since 1.0.0
*/
protected int $count = 0;
/**
* Data length.
*
* @var int
* @since 1.0.0
*/
protected int $dataLength = 0;
/**
* Error correction length.
*
* @var int
* @since 1.0.0
*/
protected int $eccLength = 0;
/**
* Value b1.
*
* @var int
* @since 1.0.0
*/
protected int $b1 = 0;
/**
* Run length.
*
* @var array
* @since 1.0.0
*/
protected array $runLength = [];
/**
* Input data string.
*
* @var string
* @since 1.0.0
*/
protected string $dataStr = '';
/**
* Input items.
*
* @var array
* @since 1.0.0
*/
protected array $items = [];
/**
* Reed-Solomon items.
*
* @var array
* @since 1.0.0
*/
protected array $rsitems = [];
/**
* Array of frames.
*
* @var array
* @since 1.0.0
*/
protected array $frames = [];
/**
* {@inheritdoc}
*/
public function generateCodeArray() : array
{
$this->codearray = [];
if (($this->hint !== self::QR_MODE_8B && $this->hint !== self::QR_MODE_KJ)
|| ($this->version < 0 || $this->version > self::QRSPEC_VERSION_MAX)
) {
return [];
}
$this->items = [];
$this->encodeString($this->content);
if (empty($this->data)) {
return [];
}
$this->codearray = $this->binarize($this->data);
return $this->codearray;
}
/**
* Convert the frame in binary form
*
* @return array
*
* @since 1.0.0
*/
protected function binarize(array $frame) : array
{
$bin = [[]];
foreach ($frame as $row => $cols) {
$len = \strlen($cols);
for ($i = 0; $i < $len; ++$i) {
$bin[$row][$i] = \ord($frame[$row][$i]) & 1;
}
}
return $bin;
}
/**
* Encode the input string to QR code
*
* @return void
*
* @since 1.0.0
*/
protected function encodeString(string $string) : void
{
$this->dataStr = $string;
if (!$this->casesensitive) {
$this->toUpper();
}
$ret = $this->splitString();
if ($ret < 0) {
return;
}
$this->encodeMask(-1);
}
/**
* Encode mask
*
* @return void
*
* @since 1.0.0
*/
protected function encodeMask(int $mask) : void
{
$spec = [0, 0, 0, 0, 0];
$this->datacode = $this->getByteStream($this->items);
if (empty($this->datacode)) {
return;
}
$spec = $this->getEccSpec($this->version, $this->level, $spec);
$this->b1 = $spec[0];
$this->dataLength = $spec[0] * $spec[1] + $spec[3] * $spec[4];
$this->eccLength = ($spec[0] + $spec[3]) * $spec[2];
$this->ecccode = \array_fill(0, $this->eccLength, 0);
$this->blocks = $spec[0] + $spec[3];
$ret = $this->init($spec);
if ($ret < 0) {
return;
}
$this->count = 0;
$this->width = self::CAPACITY[$this->version][self::QRCAP_WIDTH];
$this->frame = $this->newFrame($this->version);
$this->x = $this->width - 1;
$this->y = $this->width - 1;
$this->dir = -1;
$this->bit = -1;
// inteleaved data and ecc codes
for ($i = 0; $i < $this->dataLength + $this->eccLength; ++$i) {
$code = $this->getCode();
$bit = 0x80;
for ($j = 0; $j < 8; ++$j) {
$addr = $this->getNextPosition();
$this->frame[$addr['y']][$addr['x']] = 0x02 | (($bit & $code) !== 0);
$bit >>= 1;
}
}
// remainder bits
$j = self::CAPACITY[$this->version][self::QRCAP_REMINDER];
for ($i = 0; $i < $j; ++$i) {
$addr = $this->getNextPosition();
$this->frame[$addr['y']][$addr['x']] = 0x02;
}
// masking
$this->runLength = \array_fill(0, self::QRSPEC_WIDTH_MAX + 1, 0);
if ($mask < 0) {
$masked = self::QR_FIND_BEST_MASK
? $this->mask($this->width, $this->frame, $this->level)
: $this->makeMask($this->width, $this->frame, (self::QR_DEFAULT_MASK % 8), $this->level);
} else {
$masked = $this->makeMask($this->width, $this->frame, $mask, $this->level);
}
if (empty($masked)) {
return;
}
$this->data = $masked;
}
/**
* Get frame value at specified position
*
* @return int
*
* @since 1.0.0
*/
protected function getFrameAt(array $at) : int
{
return \ord($this->frame[$at['y']][$at['x']]);
}
/**
* Return the next frame position
*
* @return array
*
* @since 1.0.0
*/
protected function getNextPosition() : array
{
do {
if ($this->bit === -1) {
$this->bit = 0;
return ['x' => $this->x, 'y' => $this->y];
}
$x = $this->x;
$y = $this->y;
$w = $this->width;
if ($this->bit === 0) {
--$x;
++$this->bit;
} else {
++$x;
--$this->bit;
$y += $this->dir;
}
if ($this->dir < 0) {
if ($y < 0) {
$y = 0;
$x -= 2;
$this->dir = 1;
if ($x === 6) {
--$x;
$y = 9;
}
}
} elseif ($y === $w) {
$y = $w - 1;
$x -= 2;
$this->dir = -1;
if ($x === 6) {
--$x;
$y -= 8;
}
}
if (($x < 0) || ($y < 0)) {
return [];
}
$this->x = $x;
$this->y = $y;
} while (\ord($this->frame[$y][$x]) & 0x80);
return ['x' => $x, 'y' => $y];
}
// - - - - - - - - - - - - - - - - - - - - - - - - -
// QRrawcode
/**
* Initialize code.
*
* @return int
*
* @since 1.0.0
*/
protected function init(array $spec) : int
{
$dl = $spec[1];
$el = $spec[2];
$rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
$blockNo = 0;
$dataPos = 0;
$eccPos = 0;
$endfor = $spec[0];
for ($i = 0; $i < $endfor; ++$i) {
$ecc = \array_slice($this->ecccode, $eccPos);
$this->rsblocks[$blockNo] = [];
$this->rsblocks[$blockNo]['dataLength'] = $dl;
$this->rsblocks[$blockNo]['data'] = \array_slice($this->datacode, $dataPos);
$this->rsblocks[$blockNo]['eccLength'] = $el;
$ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
$this->rsblocks[$blockNo]['ecc'] = $ecc;
$this->ecccode = \array_merge(\array_slice($this->ecccode, 0, $eccPos), $ecc);
$dataPos += $dl;
$eccPos += $el;
++$blockNo;
}
if ($spec[3] === 0) {
return 0;
}
$dl = $spec[4];
$el = $spec[2];
$rs = $this->init_rs(8, 0x11d, 0, 1, $el, 255 - $dl - $el);
if ($rs === null) {
return -1;
}
$endfor = $spec[3];
for ($i = 0; $i < $endfor; ++$i) {
$ecc = \array_slice($this->ecccode, $eccPos);
$this->rsblocks[$blockNo] = [];
$this->rsblocks[$blockNo]['dataLength'] = $dl;
$this->rsblocks[$blockNo]['data'] = \array_slice($this->datacode, $dataPos);
$this->rsblocks[$blockNo]['eccLength'] = $el;
$ecc = $this->encode_rs_char($rs, $this->rsblocks[$blockNo]['data'], $ecc);
$this->rsblocks[$blockNo]['ecc'] = $ecc;
$this->ecccode = \array_merge(\array_slice($this->ecccode, 0, $eccPos), $ecc);
$dataPos += $dl;
$eccPos += $el;
++$blockNo;
}
return 0;
}
/**
* Return Reed-Solomon block
*
* @return int
*
* @since 1.0.0code.
*/
protected function getCode() : int
{
if ($this->count < $this->dataLength) {
$row = $this->count % $this->blocks;
$col = $this->count / $this->blocks;
if ($col >= $this->rsblocks[0]['dataLength']) {
$row += $this->b1;
}
$ret = $this->rsblocks[$row]['data'][$col];
} elseif ($this->count < $this->dataLength + $this->eccLength) {
$row = ($this->count - $this->dataLength) % $this->blocks;
$col = ($this->count - $this->dataLength) / $this->blocks;
$ret = $this->rsblocks[$row]['ecc'][$col];
} else {
return 0;
}
++$this->count;
return $ret;
}
/**
* Write Format Information on frame and returns the number of black bits
*
* @return int
*
* @since 1.0.0
*/
protected function writeFormatInformation(int $width, array &$frame, int $mask, int $level) : int
{
$blacks = 0;
$format = $mask < 0 || $mask > 7 || $level < 0 || $level > 3
? 0
: self::FORMAT_INFO[$level][$mask];
for ($i = 0; $i < 8; ++$i) {
if (($format & 1) !== 0) {
$blacks += 2;
$v = 0x85;
} else {
$v = 0x84;
}
$frame[8][$width - 1 - $i] = \chr($v);
if ($i < 6) {
$frame[$i][8] = \chr($v);
} else {
$frame[$i + 1][8] = \chr($v);
}
$format >>= 1;
}
for ($i = 0; $i < 7; ++$i) {
if (($format & 1) !== 0) {
$blacks += 2;
$v = 0x85;
} else {
$v = 0x84;
}
$frame[$width - 7 + $i][8] = \chr($v);
if ($i === 0) {
$frame[8][7] = \chr($v);
} else {
$frame[8][6 - $i] = \chr($v);
}
$format >>= 1;
}
return $blacks;
}
/**
* Return bitmask
*
* @return array
*
* @since 1.0.0
*/
protected function generateMaskNo(int $maskNo, int $width, array $frame) : array
{
$bitMask = \array_fill(0, $width, \array_fill(0, $width, 0));
for ($y = 0; $y < $width; ++$y) {
for ($x = 0; $x < $width; ++$x) {
if ((\ord($frame[$y][$x]) & 0x80) !== 0) {
$bitMask[$y][$x] = 0;
} else {
$maskFunc = 0;
switch ($maskNo) {
case 0:
$maskFunc = ($x + $y) & 1;
break;
case 1:
$maskFunc = $y & 1;
break;
case 2:
$maskFunc = $x % 3;
break;
case 3:
$maskFunc = ($x + $y) % 3;
break;
case 4:
$maskFunc = (((int) ($y / 2)) + ((int) ($x / 3))) & 1;
break;
case 5:
$maskFunc = (($x * $y) & 1) + ($x * $y) % 3;
break;
case 6:
$maskFunc = ((($x * $y) & 1) + ($x * $y) % 3) & 1;
break;
case 7:
$maskFunc = ((($x * $y) % 3) + (($x + $y) & 1)) & 1;
break;
}
$bitMask[$y][$x] = $maskFunc === 0 ? 1 : 0;
}
}
}
return $bitMask;
}
/**
* makeMaskNo
*
* @return int
*
* @since 1.0.0
*/
protected function makeMaskNo(int $maskNo, int $width, array $s, array &$d, bool $maskGenOnly = false) : int
{
$b = 0;
$bitMask = [];
$bitMask = $this->generateMaskNo($maskNo, $width, $s);
if ($maskGenOnly) {
return 0;
}
$d = $s;
for ($y = 0; $y < $width; ++$y) {
for ($x = 0; $x < $width; ++$x) {
if ($bitMask[$y][$x] === 1) {
$d[$y][$x] = \chr(\ord($s[$y][$x]) ^ ((int) ($bitMask[$y][$x])));
}
$b += (int) (\ord($d[$y][$x]) & 1);
}
}
return $b;
}
/**
* makeMask
*
* @return array
*
* @since 1.0.0
*/
protected function makeMask(int $width, array $frame, int $maskNo, int $level) : array
{
$masked = \array_fill(0, $width, \str_repeat("\0", $width));
$this->makeMaskNo($maskNo, $width, $frame, $masked);
$this->writeFormatInformation($width, $masked, $maskNo, $level);
return $masked;
}
/**
* calcN1N3
*
* @return int
*
* @since 1.0.0
*/
protected function calcN1N3(int $length) : int
{
$demerit = 0;
for ($i = 0; $i < $length; ++$i) {
if ($this->runLength[$i] >= 5) {
$demerit += (self::N1 + ($this->runLength[$i] - 5));
}
if (($i & 1) !== 0 && (($i >= 3)
&& ($i < ($length - 2)) && ($this->runLength[$i] % 3 === 0))
) {
$fact = (int) ($this->runLength[$i] / 3);
if (($this->runLength[$i - 2] === $fact)
&& ($this->runLength[$i - 1] === $fact)
&& ($this->runLength[$i + 1] === $fact)
&& ($this->runLength[$i + 2] === $fact)
) {
if (($this->runLength[$i - 3] < 0) || ($this->runLength[$i - 3] >= (4 * $fact))) {
$demerit += self::N3;
} elseif (($i + 3) >= $length || $this->runLength[$i + 3] >= (4 * $fact)) {
$demerit += self::N3;
}
}
}
}
return $demerit;
}
/**
* evaluateSymbol
*
* @return int
*
* @since 1.0.0
*/
protected function evaluateSymbol(int $width, array $frame) : int
{
$head = 0;
$demerit = 0;
for ($y = 0; $y < $width; ++$y) {
$head = 0;
$this->runLength[0] = 1;
$frameY = $frame[$y];
if ($y > 0) {
$frameYM = $frame[$y - 1];
}
for ($x = 0; $x < $width; ++$x) {
if (($x > 0) && ($y > 0)) {
$b22 = \ord($frameY[$x]) & \ord($frameY[$x - 1]) & \ord($frameYM[$x]) & \ord($frameYM[$x - 1]);
$w22 = \ord($frameY[$x]) | \ord($frameY[$x - 1]) | \ord($frameYM[$x]) | \ord($frameYM[$x - 1]);
if ((($b22 | ($w22 ^ 1)) & 1) !== 0) {
$demerit += self::N2;
}
}
if (($x === 0) && (\ord($frameY[$x]) & 1)) {
$this->runLength[0] = -1;
$head = 1;
$this->runLength[$head] = 1;
} elseif ($x > 0) {
if (((\ord($frameY[$x]) ^ \ord($frameY[$x - 1])) & 1) !== 0) {
++$head;
$this->runLength[$head] = 1;
} else {
++$this->runLength[$head];
}
}
}
$demerit += $this->calcN1N3($head + 1);
}
for ($x = 0; $x < $width; ++$x) {
$head = 0;
$this->runLength[0] = 1;
for ($y = 0; $y < $width; ++$y) {
if (($y === 0) && (\ord($frame[$y][$x]) & 1)) {
$this->runLength[0] = -1;
$head = 1;
$this->runLength[$head] = 1;
} elseif ($y > 0) {
if (((\ord($frame[$y][$x]) ^ \ord($frame[$y - 1][$x])) & 1) !== 0) {
++$head;
$this->runLength[$head] = 1;
} else {
++$this->runLength[$head];
}
}
}
$demerit += $this->calcN1N3($head + 1);
}
return $demerit;
}
/**
* mask
*
* @return array
*
* @since 1.0.0
*/
protected function mask(int $width, array $frame, int $level) : array
{
$minDemerit = \PHP_INT_MAX;
$bestMask = [];
$checked_masks = [0, 1, 2, 3, 4, 5, 6, 7];
if (self::QR_FIND_FROM_RANDOM !== false) {
$howManuOut = 8 - (self::QR_FIND_FROM_RANDOM % 9);
for ($i = 0; $i < $howManuOut; ++$i) {
// @note This is why the same content can result in different QR codes
$remPos = \array_rand($checked_masks, 1);
unset($checked_masks[$remPos]);
$checked_masks = \array_values($checked_masks);
}
}
$bestMask = $frame;
foreach ($checked_masks as $i) {
$mask = \array_fill(0, $width, \str_repeat("\0", $width));
$demerit = 0;
$blacks = 0;
$blacks = $this->makeMaskNo($i, $width, $frame, $mask);
$blacks += $this->writeFormatInformation($width, $mask, $i, $level);
$blacks = (int) (100 * $blacks / ($width * $width));
$demerit = (int) ((int) (\abs($blacks - 50) / 5) * self::N4);
$demerit += $this->evaluateSymbol($width, $mask);
if ($demerit < $minDemerit) {
$minDemerit = $demerit;
$bestMask = $mask;
}
}
return $bestMask;
}
/**
* Return true if the character at specified position is a number
*
* @return bool
*
* @since 1.0.0
*/
protected function isdigitat(string $str, int $pos) : bool
{
if ($pos >= \strlen($str)) {
return false;
}
return \ord($str[$pos]) >= \ord('0') && \ord($str[$pos]) <= \ord('9');
}
/**
* Return true if the character at specified position is an alphanumeric character
*
* @return bool
*
* @since 1.0.0
*/
protected function isalnumat(string $str, int $pos) : bool
{
if ($pos >= \strlen($str)) {
return false;
}
return $this->lookAnTable(\ord($str[$pos])) >= 0;
}
/**
* identifyMode
*
* @return int
*
* @since 1.0.0
*/
protected function identifyMode(int $pos) : int
{
if ($pos >= \strlen($this->dataStr)) {
return self::QR_MODE_NL;
}
$c = $this->dataStr[$pos];
if ($this->isdigitat($this->dataStr, $pos)) {
return self::QR_MODE_NM;
} elseif ($this->isalnumat($this->dataStr, $pos)) {
return self::QR_MODE_AN;
} elseif ($this->hint === self::QR_MODE_KJ) {
if ($pos + 1 < \strlen($this->dataStr)) {
$d = $this->dataStr[$pos + 1];
$word = (\ord($c) << 8) | \ord($d);
if (($word >= 0x8140 && $word <= 0x9ffc)
|| ($word >= 0xe040 && $word <= 0xebbf)
) {
return self::QR_MODE_KJ;
}
}
}
return self::QR_MODE_8B;
}
/**
* eatNum
*
* @return int
*
* @since 1.0.0
*/
protected function eatNum() : int
{
$ln = $this->lengthIndicator(self::QR_MODE_NM, $this->version);
$p = 0;
while ($this->isdigitat($this->dataStr, $p)) {
++$p;
}
$run = $p;
$mode = $this->identifyMode($p);
if ($mode === self::QR_MODE_8B) {
$dif = $this->estimateBitsModeNum($run) + 4 + $ln
+ $this->estimateBitsMode8(1) // + 4 + l8
- $this->estimateBitsMode8($run + 1); // - 4 - l8
if ($dif > 0) {
return $this->eat8();
}
}
if ($mode === self::QR_MODE_AN) {
$dif = $this->estimateBitsModeNum($run) + 4 + $ln
+ $this->estimateBitsModeAn(1) // + 4 + la
- $this->estimateBitsModeAn($run + 1);// - 4 - la
if ($dif > 0) {
return $this->eatAn();
}
}
$this->items = $this->appendNewInputItem($this->items, self::QR_MODE_NM, $run, \str_split($this->dataStr));
return $run;
}
/**
* eatAn
*
* @return int
*
* @since 1.0.0
*/
protected function eatAn() : int
{
$la = $this->lengthIndicator(self::QR_MODE_AN, $this->version);
$ln = $this->lengthIndicator(self::QR_MODE_NM, $this->version);
$p = 1;
while ($this->isalnumat($this->dataStr, $p)) {
if ($this->isdigitat($this->dataStr, $p)) {
$q = $p;
while ($this->isdigitat($this->dataStr, $q)) {
++$q;
}
$dif = $this->estimateBitsModeAn($p) // + 4 + la
+ $this->estimateBitsModeNum($q - $p) + 4 + $ln
- $this->estimateBitsModeAn($q); // - 4 - la
if ($dif < 0) {
break;
} else {
$p = $q;
}
} else {
++$p;
}
}
$run = $p;
if (!$this->isalnumat($this->dataStr, $p)) {
$dif = $this->estimateBitsModeAn($run) + 4 + $la
+ $this->estimateBitsMode8(1) // + 4 + l8
- $this->estimateBitsMode8($run + 1); // - 4 - l8
if ($dif > 0) {
return $this->eat8();
}
}
$this->items = $this->appendNewInputItem($this->items, self::QR_MODE_AN, $run, \str_split($this->dataStr));
return $run;
}
/**
* eatKanji
*
* @return int
*
* @since 1.0.0
*/
protected function eatKanji() : int
{
$p = 0;
while ($this->identifyMode($p) === self::QR_MODE_KJ) {
$p += 2;
}
$this->items = $this->appendNewInputItem($this->items, self::QR_MODE_KJ, $p, \str_split($this->dataStr));
return $p;
}
/**
* eat8
*
* @return int
*
* @since 1.0.0
*/
protected function eat8() : int
{
$la = $this->lengthIndicator(self::QR_MODE_AN, $this->version);
$ln = $this->lengthIndicator(self::QR_MODE_NM, $this->version);
$p = 1;
$dataStrLen = \strlen($this->dataStr);
while ($p < $dataStrLen) {
$mode = $this->identifyMode($p);
if ($mode === self::QR_MODE_KJ) {
break;
}
if ($mode === self::QR_MODE_NM) {
$q = $p;
while ($this->isdigitat($this->dataStr, $q)) {
++$q;
}
$dif = $this->estimateBitsMode8($p) // + 4 + l8
+ $this->estimateBitsModeNum($q - $p) + 4 + $ln
- $this->estimateBitsMode8($q); // - 4 - l8
if ($dif < 0) {
break;
} else {
$p = $q;
}
} elseif ($mode === self::QR_MODE_AN) {
$q = $p;
while ($this->isalnumat($this->dataStr, $q)) {
++$q;
}
$dif = $this->estimateBitsMode8($p) // + 4 + l8
+ $this->estimateBitsModeAn($q - $p) + 4 + $la
- $this->estimateBitsMode8($q); // - 4 - l8
if ($dif < 0) {
break;
} else {
$p = $q;
}
} else {
++$p;
}
}
$run = $p;
$this->items = $this->appendNewInputItem($this->items, self::QR_MODE_8B, $run, \str_split($this->dataStr));
return $run;
}
/**
* splitString
*
* @return int
*
* @since 1.0.0
*/
protected function splitString() : int
{
while (\strlen($this->dataStr) > 0) {
$mode = $this->identifyMode(0);
switch ($mode) {
case self::QR_MODE_NM:
$length = $this->eatNum();
break;
case self::QR_MODE_AN:
$length = $this->eatAn();
break;
case self::QR_MODE_KJ:
$length = $this->hint === self::QR_MODE_KJ
? $this->eatKanji()
: $this->eat8();
break;
default:
$length = $this->eat8();
break;
}
if ($length === 0) {
return 0;
}
if ($length < 0) {
return -1;
}
$this->dataStr = \substr($this->dataStr, $length);
}
return 0;
}
/**
* toUpper
*
* @return string
*
* @since 1.0.0
*/
protected function toUpper() : string
{
$stringLen = \strlen($this->dataStr);
$p = 0;
while ($p < $stringLen) {
$mode = $this->identifyMode(\strlen(\substr($this->dataStr, $p))/*, $this->hint*/);
if ($mode === self::QR_MODE_KJ) {
$p += 2;
} else {
if (\ord($this->dataStr[$p]) >= \ord('a')
&& \ord($this->dataStr[$p]) <= \ord('z')
) {
$this->dataStr[$p] = \chr(\ord($this->dataStr[$p]) - 32);
}
++$p;
}
}
return $this->dataStr;
}
/**
* newInputItem
*
* @return array
*
* @since 1.0.0
*/
protected function newInputItem(int $mode, int $size, array $data, array $bstream = []) : array
{
$setData = \array_slice($data, 0, $size);
if (\count($setData) < $size) {
$setData = \array_merge($setData, \array_fill(0, ($size - \count($setData)), 0));
}
if (!$this->check($mode, $size, $setData)) {
return [];
}
$inputitem = [];
$inputitem['mode'] = $mode;
$inputitem['size'] = $size;
$inputitem['data'] = $setData;
$inputitem['bstream'] = $bstream;
return $inputitem;
}
/**
* encodeModeNum
*
* @return array
*
* @since 1.0.0
*/
protected function encodeModeNum(array $inputitem, int $version) : array
{
$words = (int) ($inputitem['size'] / 3);
$inputitem['bstream'] = [];
$val = 0x1;
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(self::QR_MODE_NM, $version), $inputitem['size']);
$ord0 = \ord('0');
for ($i = 0; $i < $words; ++$i) {
$val = (\ord($inputitem['data'][$i * 3 ]) - $ord0) * 100;
$val += (\ord($inputitem['data'][$i * 3 + 1]) - $ord0) * 10;
$val += (\ord($inputitem['data'][$i * 3 + 2]) - $ord0);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 10, $val);
}
if ($inputitem['size'] - $words * 3 === 1) {
$val = \ord($inputitem['data'][$words * 3]) - $ord0;
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, $val);
} elseif (($inputitem['size'] - ($words * 3)) === 2) {
$val = (\ord($inputitem['data'][$words * 3 ]) - $ord0) * 10;
$val += (\ord($inputitem['data'][$words * 3 + 1]) - $ord0);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 7, $val);
}
return $inputitem;
}
/**
* encodeModeAn
*
* @return array
*
* @since 1.0.0
*/
protected function encodeModeAn(array $inputitem, int $version) : array
{
$words = (int) ($inputitem['size'] / 2);
$inputitem['bstream'] = [];
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x02);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(self::QR_MODE_AN, $version), $inputitem['size']);
for ($i = 0; $i < $words; ++$i) {
$val = $this->lookAnTable(\ord($inputitem['data'][$i * 2])) * 45;
$val += $this->lookAnTable(\ord($inputitem['data'][($i * 2) + 1]));
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 11, $val);
}
if (($inputitem['size'] & 1) !== 0) {
$val = $this->lookAnTable(\ord($inputitem['data'][($words * 2)]));
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 6, $val);
}
return $inputitem;
}
/**
* encodeMode8
*
* @return array
*
* @since 1.0.0
*/
protected function encodeMode8(array $inputitem, int $version) : array
{
$inputitem['bstream'] = [];
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x4);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(self::QR_MODE_8B, $version), $inputitem['size']);
for ($i = 0; $i < $inputitem['size']; ++$i) {
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, \ord($inputitem['data'][$i]));
}
return $inputitem;
}
/**
* encodeModeKanji
*
* @return array
*
* @since 1.0.0
*/
protected function encodeModeKanji(array $inputitem, int $version) : array
{
$inputitem['bstream'] = [];
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x8);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], $this->lengthIndicator(self::QR_MODE_KJ, $version), (int) ($inputitem['size'] / 2));
for ($i = 0; $i < $inputitem['size']; $i += 2) {
$val = (\ord($inputitem['data'][$i]) << 8) | \ord($inputitem['data'][$i + 1]);
if ($val <= 0x9ffc) {
$val -= 0x8140;
} else {
$val -= 0xc140;
}
$h = ($val >> 8) * 0xc0;
$val = ($val & 0xff) + $h;
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 13, $val);
}
return $inputitem;
}
/**
* encodeModeStructure
*
* @return array
*
* @since 1.0.0
*/
protected function encodeModeStructure(array $inputitem) : array
{
$inputitem['bstream'] = [];
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, 0x03);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, \ord($inputitem['data'][1]) - 1);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 4, \ord($inputitem['data'][0]) - 1);
$inputitem['bstream'] = $this->appendNum($inputitem['bstream'], 8, \ord($inputitem['data'][2]));
return $inputitem;
}
/**
* encodeBitStream
*
* @return array
*
* @since 1.0.0
*/
protected function encodeBitStream(array $inputitem, int $version) : array
{
$inputitem['bstream'] = [];
$words = $this->maximumWords($inputitem['mode'], $version);
if ($inputitem['size'] > $words) {
$st1 = $this->newInputItem($inputitem['mode'], $words, $inputitem['data']);
$st2 = $this->newInputItem($inputitem['mode'], $inputitem['size'] - $words, \array_slice($inputitem['data'], $words));
$st1 = $this->encodeBitStream($st1, $version);
$st2 = $this->encodeBitStream($st2, $version);
$inputitem['bstream'] = [];
$inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st1['bstream']);
$inputitem['bstream'] = $this->appendBitstream($inputitem['bstream'], $st2['bstream']);
} else {
switch($inputitem['mode']) {
case self::QR_MODE_NM:
$inputitem = $this->encodeModeNum($inputitem, $version);
break;
case self::QR_MODE_AN:
$inputitem = $this->encodeModeAn($inputitem, $version);
break;
case self::QR_MODE_8B:
$inputitem = $this->encodeMode8($inputitem, $version);
break;
case self::QR_MODE_KJ:
$inputitem = $this->encodeModeKanji($inputitem, $version);
break;
case self::QR_MODE_ST:
$inputitem = $this->encodeModeStructure($inputitem);
break;
}
}
return $inputitem;
}
/**
* Append data to an input object.
* The data is copied and appended to the input object.
*
* @return array
*
* @since 1.0.0
*/
protected function appendNewInputItem(array $items, int $mode, int $size, array $data) : array
{
$newitem = $this->newInputItem($mode, $size, $data);
if (!empty($newitem)) {
$items[] = $newitem;
}
return $items;
}
/**
* insertStructuredAppendHeader
*
* @return array
*
* @since 1.0.0
*/
protected function insertStructuredAppendHeader(array $items, int $size, int $index, int $parity) : array
{
if ($size > self::MAX_STRUCTURED_SYMBOLS
|| $index <= 0
|| $index > self::MAX_STRUCTURED_SYMBOLS
) {
return [];
}
$buf = [$size, $index, $parity];
$entry = $this->newInputItem(self::QR_MODE_ST, 3, $buf);
\array_unshift($items, $entry);
return $items;
}
/**
* calcParity
*
* @return int
*
* @since 1.0.0
*/
protected function calcParity(array $items) : int
{
$parity = 0;
foreach ($items as $item) {
if ($item['mode'] !== self::QR_MODE_ST) {
for ($i = $item['size'] - 1; $i >= 0; --$i) {
$parity ^= $item['data'][$i];
}
}
}
return $parity;
}
/**
* checkModeNum
*
* @return bool
*
* @since 1.0.0
*/
protected function checkModeNum(int $size, array $data) : bool
{
for ($i = 0; $i < $size; ++$i) {
if (\ord($data[$i]) < \ord('0') || \ord($data[$i]) > \ord('9')) {
return false;
}
}
return true;
}
/**
* Look up the alphabet-numeric conversion table (see JIS X0510:2004, pp.19).
*
* @return int
*
* @since 1.0.0
*/
protected function lookAnTable(int $c) : int
{
return $c > 127 ? -1 : self::AN_TABLE[$c];
}
/**
* checkModeAn
*
* @return bool
*
* @since 1.0.0
*/
protected function checkModeAn(int $size, array $data) : bool
{
for ($i = 0; $i < $size; ++$i) {
if ($this->lookAnTable(\ord($data[$i])) === -1) {
return false;
}
}
return true;
}
/**
* estimateBitsModeNum
*
* @return int
*
* @since 1.0.0
*/
protected function estimateBitsModeNum(int $size) : int
{
$w = (int) ($size / 3);
$bits = ($w * 10);
switch($size - ($w * 3)) {
case 1:
$bits += 4;
break;
case 2:
$bits += 7;
break;
}
return $bits;
}
/**
* estimateBitsModeAn
*
* @return int
*
* @since 1.0.0
*/
protected function estimateBitsModeAn(int $size) : int
{
$bits = (int) ($size * 5.5); // (size / 2 ) * 11
if (($size & 1) !== 0) {
$bits += 6;
}
return $bits;
}
/**
* estimateBitsMode8
*
* @return int
*
* @since 1.0.0
*/
protected function estimateBitsMode8(int $size) : int
{
return $size * 8;
}
/**
* estimateBitsModeKanji
*
* @return int
*
* @since 1.0.0
*/
protected function estimateBitsModeKanji(int $size) : int
{
return (int) ($size * 6.5); // (size / 2 ) * 13
}
/**
* checkModeKanji
*
* @return bool
*
* @since 1.0.0
*/
protected function checkModeKanji(int $size, array $data) : bool
{
if (($size & 1) !== 0) {
return false;
}
for ($i = 0; $i < $size; $i += 2) {
$val = (\ord($data[$i]) << 8) | \ord($data[$i + 1]);
if ($val < 0x8140 || ($val > 0x9ffc && $val < 0xe040) || $val > 0xebbf) {
return false;
}
}
return true;
}
/**
* Validate the input data.
*
* @return bool
*
* @since 1.0.0
*/
protected function check(int $mode, int $size, array $data) : bool
{
if ($size <= 0) {
return false;
}
switch($mode) {
case self::QR_MODE_NM:
return $this->checkModeNum($size, $data);
case self::QR_MODE_AN:
return $this->checkModeAn($size, $data);
case self::QR_MODE_KJ:
return $this->checkModeKanji($size, $data);
case self::QR_MODE_8B:
return true;
case self::QR_MODE_ST:
return true;
}
return false;
}
/**
* estimateBitStreamSize
*
* @return int
*
* @since 1.0.0
*/
protected function estimateBitStreamSize(array $items, int $version) : int
{
$bits = 0;
if ($version === 0) {
$version = 1;
}
foreach ($items as $item) {
switch($item['mode']) {
case self::QR_MODE_NM:
$bits = $this->estimateBitsModeNum($item['size']);
break;
case self::QR_MODE_AN:
$bits = $this->estimateBitsModeAn($item['size']);
break;
case self::QR_MODE_8B:
$bits = $this->estimateBitsMode8($item['size']);
break;
case self::QR_MODE_KJ:
$bits = $this->estimateBitsModeKanji($item['size']);
break;
case self::QR_MODE_ST:
return self::STRUCTURE_HEADER_BITS;
default:
return 0;
}
$l = $this->lengthIndicator($item['mode'], $version);
$m = 1 << $l;
$num = (int) (($item['size'] + $m - 1) / $m);
$bits += $num * (4 + $l);
}
return $bits;
}
/**
* estimateVersion
*
* @return int
*
* @since 1.0.0
*/
protected function estimateVersion(array $items) : int
{
$version = 0;
$prev = 0;
do {
$prev = $version;
$bits = $this->estimateBitStreamSize($items, $prev);
$version = $this->getMinimumVersion((int) (($bits + 7) / 8), $this->level);
if ($version < 0) {
return -1;
}
} while ($version > $prev);
return $version;
}
/**
* lengthOfCode
*
* @return int
*
* @since 1.0.0
*/
protected function lengthOfCode(int $mode, int $version, int $bits) : int
{
$payload = $bits - 4 - $this->lengthIndicator($mode, $version);
switch($mode) {
case self::QR_MODE_NM:
$chunks = (int) ($payload / 10);
$remain = $payload - $chunks * 10;
$size = $chunks * 3;
if ($remain >= 7) {
$size += 2;
} elseif ($remain >= 4) {
++$size;
}
break;
case self::QR_MODE_AN:
$chunks = (int) ($payload / 11);
$remain = $payload - $chunks * 11;
$size = $chunks * 2;
if ($remain >= 6) {
++$size;
}
break;
case self::QR_MODE_8B:
$size = (int) ($payload / 8);
break;
case self::QR_MODE_KJ:
$size = (int) (($payload / 13) * 2);
break;
case self::QR_MODE_ST:
$size = (int) ($payload / 8);
break;
default:
$size = 0;
break;
}
$maxsize = $this->maximumWords($mode, $version);
if ($size < 0) {
$size = 0;
}
if ($size > $maxsize) {
$size = $maxsize;
}
return $size;
}
/**
* createBitStream
*
* @return array
*
* @since 1.0.0
*/
protected function createBitStream(array $items) : array
{
$total = 0;
foreach ($items as $key => $item) {
$items[$key] = $this->encodeBitStream($item, $this->version);
$bits = \count($items[$key]['bstream']);
$total += $bits;
}
return [$items, $total];
}
/**
* convertData
*
* @return array
*
* @since 1.0.0
*/
protected function convertData(array $items) : array
{
$ver = $this->estimateVersion($items);
if ($ver > $this->version) {
$this->version = $ver;
}
while (true) {
$cbs = $this->createBitStream($items);
$items = $cbs[0];
$bits = $cbs[1];
if ($bits < 0) {
return [];
}
$ver = $this->getMinimumVersion((int) (($bits + 7) / 8), $this->level);
if ($ver < 0) {
return [];
} elseif ($ver > $this->version) {
$this->version = $ver;
} else {
break;
}
}
return $items;
}
/**
* Append Padding Bit to bitstream
*
* @return array
*
* @since 1.0.0
*/
protected function appendPaddingBit(array $bstream) : array
{
if (empty($bstream)) {
return [];
}
$bits = \count($bstream);
$maxwords = self::CAPACITY[$this->version][self::QRCAP_WORDS] - self::CAPACITY[$this->version][self::QRCAP_EC][$this->level];
$maxbits = $maxwords * 8;
if ($maxbits === $bits) {
return $bstream;
}
if ($maxbits - $bits < 5) {
return $this->appendNum($bstream, $maxbits - $bits, 0);
}
$bits += 4;
$words = (int) (($bits + 7) / 8);
$padding = [];
$padding = $this->appendNum($padding, $words * 8 - $bits + 4, 0);
$padlen = $maxwords - $words;
if ($padlen > 0) {
$padbuf = [];
for ($i = 0; $i < $padlen; ++$i) {
$padbuf[$i] = (($i & 1) !== 0) ? 0x11 : 0xec;
}
$padding = $this->appendBytes($padding, $padlen, $padbuf);
}
return $this->appendBitstream($bstream, $padding);
}
/**
* mergeBitStream
*
* @return array
*
* @since 1.0.0
*/
protected function mergeBitStream(array $items) : array
{
$items = $this->convertData($items);
if (empty($items)) {
return [];
}
$bstream = [];
foreach ($items as $item) {
$bstream = $this->appendBitstream($bstream, $item['bstream']);
}
return $bstream;
}
/**
* Returns a stream of bits.
*
* @return array
*
* @since 1.0.0
*/
protected function getBitStream(array $items) : array
{
$bstream = $this->mergeBitStream($items);
return $this->appendPaddingBit($bstream);
}
/**
* Pack all bit streams padding bits into a byte array.
*
* @return array
*
* @since 1.0.0
*/
protected function getByteStream(array $items) : array
{
$bstream = $this->getBitStream($items);
return $this->bitstreamToByte($bstream);
}
/**
* Return an array with zeros
*
* @return array
*
* @since 1.0.0
*/
protected function allocate(int $setLength) : array
{
return \array_fill(0, $setLength, 0);
}
/**
* Return new bitstream from number
*
* @return array
*
* @since 1.0.0
*/
protected function newFromNum(int $bits, int $num) : array
{
$bstream = $this->allocate($bits);
$mask = 1 << ($bits - 1);
for ($i = 0; $i < $bits; ++$i) {
$bstream[$i] = (($num & $mask) !== 0) ? 1 : 0;
$mask >>= 1;
}
return $bstream;
}
/**
* Return new bitstream from bytes
*
* @return array
*
* @since 1.0.0
*/
protected function newFromBytes(int $size, array $data) : array
{
$bstream = $this->allocate($size * 8);
$p = 0;
for ($i = 0; $i < $size; ++$i) {
$mask = 0x80;
for ($j = 0; $j < 8; ++$j) {
$bstream[$p] = (($data[$i] & $mask) !== 0) ? 1 : 0;
$mask >>= 1;
++$p;
}
}
return $bstream;
}
/**
* Append one bitstream to another
*
* @return array
*
* @since 1.0.0
*/
protected function appendBitstream(array $bitstream, array $append) : array
{
if (empty($append)) {
return $bitstream;
}
if (empty($bitstream)) {
return $append;
}
return \array_values(\array_merge($bitstream, $append));
}
/**
* Append one bitstream created from number to another
*
* @return array
*
* @since 1.0.0
*/
protected function appendNum(array $bitstream, int $bits, int $num) : array
{
if ($bits === 0) {
return [];
}
$b = $this->newFromNum($bits, $num);
return $this->appendBitstream($bitstream, $b);
}
/**
* Append one bitstream created from bytes to another
*
* @return array
*
* @since 1.0.0
*/
protected function appendBytes(array $bitstream, int $size, array $data) : array
{
if ($size === 0) {
return [];
}
$b = $this->newFromBytes($size, $data);
return $this->appendBitstream($bitstream, $b);
}
/**
* Convert bitstream to bytes
*
* @return array
*
* @since 1.0.0
*/
protected function bitstreamToByte(array $bstream) : array
{
$size = \count($bstream);
if ($size === 0) {
return [];
}
$data = \array_fill(0, (int) (($size + 7) / 8), 0);
$bytes = (int) ($size / 8);
$p = 0;
for ($i = 0; $i < $bytes; ++$i) {
$v = 0;
for ($j = 0; $j < 8; ++$j) {
$v <<= 1;
$v |= $bstream[$p];
++$p;
}
$data[$i] = $v;
}
if (($size & 7) !== 0) {
$v = 0;
for ($j = 0; $j < ($size & 7); ++$j) {
$v <<= 1;
$v |= $bstream[$p];
++$p;
}
$data[$bytes] = $v;
}
return $data;
}
/**
* Replace a value on the array at the specified position
*
* @return array
*
* @since 1.0.0
*/
protected function qrstrset(array $srctab, int $x, int $y, string $repl, int $replLen = 0) : array
{
$srctab[$y] = \substr_replace(
$srctab[$y],
$replLen !== 0 ? \substr($repl, 0, $replLen) : $repl,
$x,
$replLen !== 0 ? $replLen : \strlen($repl)
);
return $srctab;
}
/**
* Return a version number that satisfies the input code length.
*
* @return int
*
* @since 1.0.0
*/
protected function getMinimumVersion(int $size, int $level) : int
{
for ($i = 1; $i <= self::QRSPEC_VERSION_MAX; ++$i) {
$words = self::CAPACITY[$i][self::QRCAP_WORDS] - self::CAPACITY[$i][self::QRCAP_EC][$level];
if ($words >= $size) {
return $i;
}
}
// the size of input data is greater than QR capacity, try to lover the error correction mode
return -1;
}
/**
* Return the size of length indicator for the mode and version.
*
* @return int
*
* @since 1.0.0
*/
protected function lengthIndicator(int $mode, int $version) : int
{
if ($mode === self::QR_MODE_ST) {
return 0;
}
if ($version <= 9) {
$l = 0;
} elseif ($version <= 26) {
$l = 1;
} else {
$l = 2;
}
return self::LENGTH_TABLE_BITS[$mode][$l];
}
/**
* Return the maximum length for the mode and version.
*
* @return int
*
* @since 1.0.0
*/
protected function maximumWords(int $mode, int $version) : int
{
if ($mode === self::QR_MODE_ST) {
return 3;
}
if ($version <= 9) {
$l = 0;
} elseif ($version <= 26) {
$l = 1;
} else {
$l = 2;
}
$bits = self::LENGTH_TABLE_BITS[$mode][$l];
$words = (1 << $bits) - 1;
if ($mode === self::QR_MODE_KJ) {
$words *= 2; // the number of bytes is required
}
return $words;
}
/**
* Return an array of ECC specification.
*
* @return array
*
* @since 1.0.0
*/
protected function getEccSpec(int $version, int $level, array $spec) : array
{
if (\count($spec) < 5) {
$spec = [0, 0, 0, 0, 0];
}
$b1 = self::ECC_TABLE[$version][$level][0];
$b2 = self::ECC_TABLE[$version][$level][1];
$data = self::CAPACITY[$version][self::QRCAP_WORDS] - self::CAPACITY[$version][self::QRCAP_EC][$level];
$ecc = self::CAPACITY[$version][self::QRCAP_EC][$level];
if ($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;
}
return $spec;
}
/**
* Put an alignment marker.
*
* @return array
*
* @since 1.0.0
*/
protected function putAlignmentMarker(array $frame, int $ox, int $oy) : array
{
$yStart = $oy - 2;
$xStart = $ox - 2;
for ($y = 0; $y < 5; ++$y) {
$frame = $this->qrstrset($frame, $xStart, $yStart + $y, self::PUT_ALIGNMENT_FILTER[$y]);
}
return $frame;
}
/**
* Put an alignment pattern.
*
* @return array
*
* @since 1.0.0
*/
protected function putAlignmentPattern(int $version, array $frame, int $width) : array
{
if ($version < 2) {
return $frame;
}
$d = self::ALIGNMENT_PATTERN[$version][1] - self::ALIGNMENT_PATTERN[$version][0];
$w = $d < 0
? 2
: (int) (($width - self::ALIGNMENT_PATTERN[$version][0]) / $d + 2);
if ($w * $w - 3 === 1) {
$x = self::ALIGNMENT_PATTERN[$version][0];
$y = self::ALIGNMENT_PATTERN[$version][0];
return $this->putAlignmentMarker($frame, $x, $y);
}
$cx = self::ALIGNMENT_PATTERN[$version][0];
$wo = $w - 1;
for ($x = 1; $x < $wo; ++$x) {
$frame = $this->putAlignmentMarker($frame, 6, $cx);
$frame = $this->putAlignmentMarker($frame, $cx, 6);
$cx += $d;
}
$cy = self::ALIGNMENT_PATTERN[$version][0];
for ($y = 0; $y < $wo; ++$y) {
$cx = self::ALIGNMENT_PATTERN[$version][0];
for ($x = 0; $x < $wo; ++$x) {
$frame = $this->putAlignmentMarker($frame, $cx, $cy);
$cx += $d;
}
$cy += $d;
}
return $frame;
}
/**
* Put a finder pattern.
*
* @return array
*
* @since 1.0.0
*/
protected function putFinderPattern(array $frame, int $ox, int $oy) : array
{
for ($y = 0; $y < 7; ++$y) {
$frame = $this->qrstrset($frame, $ox, ($oy + $y), self::PUT_FINDER[$y]);
}
return $frame;
}
/**
* Return a copy of initialized frame.
*
* @return array
*
* @since 1.0.0
*/
protected function createFrame(int $version) : array
{
$width = self::CAPACITY[$version][self::QRCAP_WIDTH];
$frameLine = \str_repeat("\0", $width);
$frame = \array_fill(0, $width, $frameLine);
// Finder pattern
$frame = $this->putFinderPattern($frame, 0, 0);
$frame = $this->putFinderPattern($frame, $width - 7, 0);
$frame = $this->putFinderPattern($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);
$frame = $this->qrstrset($frame, 0, 7, $setPattern);
$frame = $this->qrstrset($frame, $width - 8, 7, $setPattern);
$frame = $this->qrstrset($frame, 0, $width - 8, $setPattern);
// Format info
$setPattern = \str_repeat("\x84", 9);
$frame = $this->qrstrset($frame, 0, 8, $setPattern);
$frame = $this->qrstrset($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
$wo = $width - 15;
for ($i = 1; $i < $wo; ++$i) {
$frame[6][7 + $i] = \chr(0x90 | ($i & 1));
$frame[7 + $i][6] = \chr(0x90 | ($i & 1));
}
// Alignment pattern
$frame = $this->putAlignmentPattern($version, $frame, $width);
// Version information
if ($version >= 7) {
$vinf = $version > self::QRSPEC_VERSION_MAX
? 0
: self::VERSION_PATTERN[$version - 7];
$v = $vinf;
for ($x = 0; $x < 6; ++$x) {
for ($y = 0; $y < 3; ++$y) {
$frame[($width - 11) + $y][$x] = \chr(0x88 | ($v & 1));
$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 >>= 1;
}
}
}
// and a little bit...
$frame[$width - 8][8] = "\x81";
return $frame;
}
/**
* Set new frame for the specified version.
*
* @return array
*
* @since 1.0.0
*/
protected function newFrame(int $version) : array
{
if ($version < 1 || $version > self::QRSPEC_VERSION_MAX) {
return [];
}
if (!isset($this->frames[$version])) {
$this->frames[$version] = $this->createFrame($version);
}
if ($this->frames[$version] === null) {
return [];
}
return $this->frames[$version];
}
/**
* Initialize a Reed-Solomon codec and add it to existing rsitems
*
* @return array
*
* @since 1.0.0
*/
protected function init_rs(int $symsize, int $gfpoly, int $fcr, int $prim, int $nroots, int $pad) : array
{
foreach ($this->rsitems as $rs) {
if (($rs['pad'] !== $pad) || ($rs['nroots'] !== $nroots) || ($rs['mm'] !== $symsize)
|| ($rs['gfpoly'] !== $gfpoly) || ($rs['fcr'] !== $fcr) || ($rs['prim'] !== $prim)
) {
continue;
}
return $rs;
}
$rs = $this->init_rs_char($symsize, $gfpoly, $fcr, $prim, $nroots, $pad);
\array_unshift($this->rsitems, $rs);
return $rs;
}
/**
* modnn
*
* @return int
*
* @since 1.0.0
*/
protected function modnn(array $rs, int $x) : int
{
while ($x >= $rs['nn']) {
$x -= $rs['nn'];
$x = ($x >> $rs['mm']) + ($x & $rs['nn']);
}
return $x;
}
/**
* Initialize a Reed-Solomon codec and returns an array of values.
*
* @return array
*
* @since 1.0.0
*/
protected function init_rs_char(int $symsize, int $gfpoly, int $fcr, int $prim, int $nroots, int $pad) : array
{
// Based on Reed solomon encoder by Phil Karn, KA9Q (GNU-LGPLv2)
// Check parameter ranges
if ($symsize < 0 || $symsize > 8
|| $fcr < 0 || $fcr >= (1 << $symsize)
|| $prim <= 0 || $prim >= (1 << $symsize)
|| $nroots < 0 || $nroots >= (1 << $symsize)
|| $pad < 0 || $pad >= ((1 << $symsize) - 1 - $nroots)
) {
return [];
}
$rs = [];
$rs['mm'] = $symsize;
$rs['nn'] = (1 << $symsize) - 1;
$rs['pad'] = $pad;
$rs['alpha_to'] = \array_fill(0, ($rs['nn'] + 1), 0);
$rs['index_of'] = \array_fill(0, ($rs['nn'] + 1), 0);
// PHP style macro replacement ;)
$NN = & $rs['nn'];
$A0 = & $NN;
// Generate Galois field lookup tables
$rs['index_of'][0] = $A0; // log(zero) = -inf
$rs['alpha_to'][$A0] = 0; // alpha**-inf = 0
$sr = 1;
for ($i = 0; $i < $rs['nn']; ++$i) {
$rs['index_of'][$sr] = $i;
$rs['alpha_to'][$i] = $sr;
$sr <<= 1;
if (($sr & (1 << $symsize)) !== 0) {
$sr ^= $gfpoly;
}
$sr &= $rs['nn'];
}
if ($sr !== 1) {
// field generator polynomial is not primitive!
return [];
}
// Form RS code generator polynomial from its roots
$rs['genpoly'] = \array_fill(0, ($nroots + 1), 0);
$rs['fcr'] = $fcr;
$rs['prim'] = $prim;
$rs['nroots'] = $nroots;
$rs['gfpoly'] = $gfpoly;
// Find prim-th root of 1, used in decoding
$iprim = 1;
while ($iprim % $prim !== 0) {
$iprim += $rs['nn'];
}
$rs['iprim'] = (int) ($iprim / $prim);
$rs['genpoly'][0] = 1;
for ($i = 0, $root = $fcr * $prim; $i < $nroots; ++$i, $root += $prim) {
$rs['genpoly'][$i + 1] = 1;
// Multiply rs->genpoly[] by @**(root + x)
for ($j = $i; $j > 0; --$j) {
if ($rs['genpoly'][$j] !== 0) {
$rs['genpoly'][$j] = $rs['genpoly'][$j - 1] ^ $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][$j]] + $root)];
} else {
$rs['genpoly'][$j] = $rs['genpoly'][$j - 1];
}
}
// rs->genpoly[0] can never be zero
$rs['genpoly'][0] = $rs['alpha_to'][$this->modnn($rs, $rs['index_of'][$rs['genpoly'][0]] + $root)];
}
// convert rs->genpoly[] to index form for quicker encoding
for ($i = 0; $i <= $nroots; ++$i) {
$rs['genpoly'][$i] = $rs['index_of'][$rs['genpoly'][$i]];
}
return $rs;
}
/**
* Encode a Reed-Solomon codec and returns the parity array
*
* @return array
*
* @since 1.0.0
*/
protected function encode_rs_char(array $rs, array $data, array $parity) : array
{
$MM = & $rs['mm']; // bits per symbol
$NN = & $rs['nn']; // the total number of symbols in a RS block
$ALPHA_TO = & $rs['alpha_to']; // the address of an array of NN elements to convert Galois field elements in index (log) form to polynomial form
$INDEX_OF = & $rs['index_of']; // the address of an array of NN elements to convert Galois field elements in polynomial form to index (log) form
$GENPOLY = & $rs['genpoly']; // an array of NROOTS+1 elements containing the generator polynomial in index form
$NROOTS = & $rs['nroots']; // the number of roots in the RS code generator polynomial, which is the same as the number of parity symbols in a block
$FCR = & $rs['fcr']; // first consecutive root, index form
$PRIM = & $rs['prim']; // primitive element, index form
$IPRIM = & $rs['iprim']; // prim-th root of 1, index form
$PAD = & $rs['pad']; // the number of pad symbols in a block
$A0 = & $NN;
$parity = \array_fill(0, $NROOTS, 0);
for ($i = 0; $i < $NN - $NROOTS - $PAD; ++$i) {
$feedback = $INDEX_OF[$data[$i] ^ $parity[0]];
if ($feedback !== $A0) {
// feedback term is non-zero
// This line is unnecessary when GENPOLY[NROOTS] is unity, as it must
// always be for the polynomials constructed by init_rs()
$feedback = $this->modnn($rs, $NN - $GENPOLY[$NROOTS] + $feedback);
for ($j = 1; $j < $NROOTS; ++$j) {
$parity[$j] ^= $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[($NROOTS - $j)])];
}
}
// Shift
\array_shift($parity);
$parity[] = $feedback !== $A0
? $ALPHA_TO[$this->modnn($rs, $feedback + $GENPOLY[0])]
: 0;
}
return $parity;
}
}
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