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Long Term Support Release
- Bug fixes for general core bugs in 4.1.x will end 13 November 2023 (12 months).
- Bug fixes for security issues in 4.1.x will end 10 November 2025 (36 months).
- PHP version: minimum PHP 7.4.0 Note: minimum PHP version has increased since Moodle 4.0. PHP 8.0.x is supported too.
/lib/tcpdf/include/barcodes/ -> datamatrix.php (source)
Differences Between: [Versions 310 and 401] [Versions 311 and 401] [Versions 39 and 401] [Versions 400 and 401] [Versions 401 and 402] [Versions 401 and 403]
(no description)
| Author: | Nicola Asuni |
| Version: | 1.0.008 |
| File Size: | 1176 lines (43 kb) |
| Included or required: | 0 times |
| Referenced: | 0 times |
| Includes or requires: | 0 files |
Defines 1 class
Datamatrix:: (18 methods):
__construct()
getBarcodeArray()
getGFProduct()
getErrorCorrection()
get253StateCodeword()
get255StateCodeword()
isCharMode()
lookAheadTest()
getSwitchEncodingCodeword()
getMaxDataCodewords()
getHighLevelEncoding()
placeModule()
placeUtah()
placeCornerA()
placeCornerB()
placeCornerC()
placeCornerD()
getPlacementMap()
Class: Datamatrix - X-Ref
| __construct($code) X-Ref |
| This is the class constructor. Creates a datamatrix object param: string $code Code to represent using Datamatrix. |
| getBarcodeArray() X-Ref |
| Returns a barcode array which is readable by TCPDF return: array barcode array readable by TCPDF; |
| getGFProduct($a, $b, $log, $alog, $gf) X-Ref |
| Product of two numbers in a Power-of-Two Galois Field param: int $a first number to multiply. param: int $b second number to multiply. param: array $log Log table. param: array $alog Anti-Log table. param: int $gf Number of Factors of the Reed-Solomon polynomial. return: int product |
| getErrorCorrection($wd, $nb, $nd, $nc, $gf=256, $pp=301) X-Ref |
| Add error correction codewords to data codewords array (ANNEX E). param: array $wd Array of datacodewords. param: int $nb Number of blocks. param: int $nd Number of data codewords per block. param: int $nc Number of correction codewords per block. param: int $gf numner of fields on log/antilog table (power of 2). param: int $pp The value of its prime modulus polynomial (301 for ECC200). return: array data codewords + error codewords |
| get253StateCodeword($cwpad, $cwpos) X-Ref |
| Return the 253-state codeword param: int $cwpad Pad codeword. param: int $cwpos Number of data codewords from the beginning of encoded data. return: int pad codeword |
| get255StateCodeword($cwpad, $cwpos) X-Ref |
| Return the 255-state codeword param: int $cwpad Pad codeword. param: int $cwpos Number of data codewords from the beginning of encoded data. return: int pad codeword |
| isCharMode($chr, $mode) X-Ref |
| Returns true if the char belongs to the selected mode param: int $chr Character (byte) to check. param: int $mode Current encoding mode. return: boolean true if the char is of the selected mode. |
| lookAheadTest($data, $pos, $mode) X-Ref |
| The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S). param: string $data data to encode param: int $pos current position param: int $mode current encoding mode return: int encoding mode |
| getSwitchEncodingCodeword($mode) X-Ref |
| Get the switching codeword to a new encoding mode (latch codeword) param: int $mode New encoding mode. return: int Switch codeword. |
| getMaxDataCodewords($numcw) X-Ref |
| Choose the minimum matrix size and return the max number of data codewords. param: int $numcw Number of current codewords. return: int number of data codewords in matrix |
| getHighLevelEncoding($data) X-Ref |
| Get high level encoding using the minimum symbol data characters for ECC 200 param: string $data data to encode return: array of codewords |
| placeModule($marr, $nrow, $ncol, $row, $col, $chr, $bit) X-Ref |
| Places "chr+bit" with appropriate wrapping within array[]. (Annex F - ECC 200 symbol character placement) param: array $marr Array of symbols. param: int $nrow Number of rows. param: int $ncol Number of columns. param: int $row Row number. param: int $col Column number. param: int $chr Char byte. param: int $bit Bit. return: array |
| placeUtah($marr, $nrow, $ncol, $row, $col, $chr) X-Ref |
| Places the 8 bits of a utah-shaped symbol character. (Annex F - ECC 200 symbol character placement) param: array $marr Array of symbols. param: int $nrow Number of rows. param: int $ncol Number of columns. param: int $row Row number. param: int $col Column number. param: int $chr Char byte. return: array |
| placeCornerA($marr, $nrow, $ncol, $chr) X-Ref |
| Places the 8 bits of the first special corner case. (Annex F - ECC 200 symbol character placement) param: array $marr Array of symbols. param: int $nrow Number of rows. param: int $ncol Number of columns. param: int $chr Char byte. return: array |
| placeCornerB($marr, $nrow, $ncol, $chr) X-Ref |
| Places the 8 bits of the second special corner case. (Annex F - ECC 200 symbol character placement) param: array $marr Array of symbols. param: int $nrow Number of rows. param: int $ncol Number of columns. param: int $chr Char byte. return: array |
| placeCornerC($marr, $nrow, $ncol, $chr) X-Ref |
| Places the 8 bits of the third special corner case. (Annex F - ECC 200 symbol character placement) param: array $marr Array of symbols. param: int $nrow Number of rows. param: int $ncol Number of columns. param: int $chr Char byte. return: array |
| placeCornerD($marr, $nrow, $ncol, $chr) X-Ref |
| Places the 8 bits of the fourth special corner case. (Annex F - ECC 200 symbol character placement) param: array $marr Array of symbols. param: int $nrow Number of rows. param: int $ncol Number of columns. param: int $chr Char byte. return: array |
| getPlacementMap($nrow, $ncol) X-Ref |
| Build a placement map. (Annex F - ECC 200 symbol character placement) param: int $nrow Number of rows. param: int $ncol Number of columns. return: array |
