ILIAS  release_5-0 Revision 5.0.0-1144-gc4397b1f870
Public Member Functions | Protected Member Functions | Protected Attributes
Datamatrix Class Reference

Class to create DataMatrix ECC 200 barcode arrays for TCPDF class. More...

+ Collaboration diagram for Datamatrix:

Public Member Functions

 __construct ($code)
 This is the class constructor. More...
 
 getBarcodeArray ()
 Returns a barcode array which is readable by TCPDF. More...
 

Protected Member Functions

 getGFProduct ($a, $b, $log, $alog, $gf)
 Product of two numbers in a Power-of-Two Galois Field. More...
 
 getErrorCorrection ($wd, $nb, $nd, $nc, $gf=256, $pp=301)
 Add error correction codewords to data codewords array (ANNEX E). More...
 
 get253StateCodeword ($cwpad, $cwpos)
 Return the 253-state codeword. More...
 
 get255StateCodeword ($cwpad, $cwpos)
 Return the 255-state codeword. More...
 
 isCharMode ($chr, $mode)
 Returns true if the char belongs to the selected mode. More...
 
 lookAheadTest ($data, $pos, $mode)
 The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S). More...
 
 getSwitchEncodingCodeword ($mode)
 Get the switching codeword to a new encoding mode (latch codeword) More...
 
 getMaxDataCodewords ($numcw)
 Choose the minimum matrix size and return the max number of data codewords. More...
 
 getHighLevelEncoding ($data)
 Get high level encoding using the minimum symbol data characters for ECC 200. More...
 
 placeModule ($marr, $nrow, $ncol, $row, $col, $chr, $bit)
 Places "chr+bit" with appropriate wrapping within array[]. More...
 
 placeUtah ($marr, $nrow, $ncol, $row, $col, $chr)
 Places the 8 bits of a utah-shaped symbol character. More...
 
 placeCornerA ($marr, $nrow, $ncol, $chr)
 Places the 8 bits of the first special corner case. More...
 
 placeCornerB ($marr, $nrow, $ncol, $chr)
 Places the 8 bits of the second special corner case. More...
 
 placeCornerC ($marr, $nrow, $ncol, $chr)
 Places the 8 bits of the third special corner case. More...
 
 placeCornerD ($marr, $nrow, $ncol, $chr)
 Places the 8 bits of the fourth special corner case. More...
 
 getPlacementMap ($nrow, $ncol)
 Build a placement map. More...
 

Protected Attributes

 $barcode_array = array()
 Barcode array to be returned which is readable by TCPDF. More...
 
 $last_enc = ENC_ASCII
 Store last used encoding for data codewords. More...
 
 $symbattr
 Table of Data Matrix ECC 200 Symbol Attributes: More...
 
 $chset_id = array(ENC_C40 => 'C40', ENC_TXT => 'TXT', ENC_X12 =>'X12')
 Map encodation modes whit character sets. More...
 
 $chset
 Basic set of characters for each encodation mode. More...
 

Detailed Description

Class to create DataMatrix ECC 200 barcode arrays for TCPDF class.

DataMatrix (ISO/IEC 16022:2006) is a 2-dimensional bar code.

Definition at line 110 of file datamatrix.php.

Constructor & Destructor Documentation

◆ __construct()

Datamatrix::__construct (   $code)

This is the class constructor.

Creates a datamatrix object

Parameters
$code(string) Code to represent using Datamatrix.

Definition at line 235 of file datamatrix.php.

235 {
236 $barcode_array = array();
237 if ((is_null($code)) OR ($code == '\0') OR ($code == '')) {
238 return false;
239 }
240 // get data codewords
241 $cw = $this->getHighLevelEncoding($code);
242 // number of data codewords
243 $nd = count($cw);
244 // check size
245 if ($nd > 1558) {
246 return false;
247 }
248 // get minimum required matrix size.
249 foreach ($this->symbattr as $params) {
250 if ($params[11] >= $nd) {
251 break;
252 }
253 }
254 if ($params[11] < $nd) {
255 // too much data
256 return false;
257 } elseif ($params[11] > $nd) {
258 // add padding
259 if ($this->last_enc == ENC_EDF) {
260 // switch to ASCII encoding
261 $cw[] = 124;
262 ++$nd;
263 } elseif (($this->last_enc != ENC_ASCII) AND ($this->last_enc != ENC_BASE256)) {
264 // switch to ASCII encoding
265 $cw[] = 254;
266 ++$nd;
267 }
268 if ($params[11] > $nd) {
269 // add first pad
270 $cw[] = 129;
271 ++$nd;
272 // add remaining pads
273 for ($i = $nd; $i < $params[11]; ++$i) {
274 $cw[] = $this->get253StateCodeword(129, $i);
275 }
276 }
277 }
278 // add error correction codewords
279 $cw = $this->getErrorCorrection($cw, $params[13], $params[14], $params[15]);
280 // initialize empty arrays
281 $grid = array_fill(0, ($params[2] * $params[3]), 0);
282 // get placement map
283 $places = $this->getPlacementMap($params[2], $params[3]);
284 // fill the grid with data
285 $grid = array();
286 $i = 0;
287 // region data row max index
288 $rdri = ($params[4] - 1);
289 // region data column max index
290 $rdci = ($params[5] - 1);
291 // for each vertical region
292 for ($vr = 0; $vr < $params[9]; ++$vr) {
293 // for each row on region
294 for ($r = 0; $r < $params[4]; ++$r) {
295 // get row
296 $row = (($vr * $params[4]) + $r);
297 // for each horizontal region
298 for ($hr = 0; $hr < $params[8]; ++$hr) {
299 // for each column on region
300 for ($c = 0; $c < $params[5]; ++$c) {
301 // get column
302 $col = (($hr * $params[5]) + $c);
303 // braw bits by case
304 if ($r == 0) {
305 // top finder pattern
306 if ($c % 2) {
307 $grid[$row][$col] = 0;
308 } else {
309 $grid[$row][$col] = 1;
310 }
311 } elseif ($r == $rdri) {
312 // bottom finder pattern
313 $grid[$row][$col] = 1;
314 } elseif ($c == 0) {
315 // left finder pattern
316 $grid[$row][$col] = 1;
317 } elseif ($c == $rdci) {
318 // right finder pattern
319 if ($r % 2) {
320 $grid[$row][$col] = 1;
321 } else {
322 $grid[$row][$col] = 0;
323 }
324 } else { // data bit
325 if ($places[$i] < 2) {
326 $grid[$row][$col] = $places[$i];
327 } else {
328 // codeword ID
329 $cw_id = (floor($places[$i] / 10) - 1);
330 // codeword BIT mask
331 $cw_bit = pow(2, (8 - ($places[$i] % 10)));
332 $grid[$row][$col] = (($cw[$cw_id] & $cw_bit) == 0) ? 0 : 1;
333 }
334 ++$i;
335 }
336 }
337 }
338 }
339 }
340 $this->barcode_array['num_rows'] = $params[0];
341 $this->barcode_array['num_cols'] = $params[1];
342 $this->barcode_array['bcode'] = $grid;
343 }
Datamatrix\getPlacementMap
getPlacementMap($nrow, $ncol)
Build a placement map.
Definition: datamatrix.php:1089
Datamatrix\get253StateCodeword
get253StateCodeword($cwpad, $cwpos)
Return the 253-state codeword.
Definition: datamatrix.php:444
Datamatrix\$barcode_array
$barcode_array
Barcode array to be returned which is readable by TCPDF.
Definition: datamatrix.php:116
Datamatrix\getHighLevelEncoding
getHighLevelEncoding($data)
Get high level encoding using the minimum symbol data characters for ECC 200.
Definition: datamatrix.php:702
Datamatrix\getErrorCorrection
getErrorCorrection($wd, $nb, $nd, $nc, $gf=256, $pp=301)
Add error correction codewords to data codewords array (ANNEX E).
Definition: datamatrix.php:382
ENC_ASCII
const ENC_ASCII(!defined('DATAMATRIXDEFS'))
ASCII encoding: ASCII character 0 to 127 (1 byte per CW)
Definition: datamatrix.php:64
ENC_BASE256
const ENC_BASE256
BASE 256 encoding: ASCII character 0 to 255 (1 byte per CW)
Definition: datamatrix.php:89
ENC_EDF
const ENC_EDF
EDIFACT encoding: ASCII character 32 to 94 (4/3 bytes per CW)
Definition: datamatrix.php:84
$nd
$nd
Definition: error.php:9

References $barcode_array, $nd, $row, ENC_ASCII, ENC_BASE256, ENC_EDF, get253StateCodeword(), getErrorCorrection(), getHighLevelEncoding(), and getPlacementMap().

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Member Function Documentation

◆ get253StateCodeword()

Datamatrix::get253StateCodeword (   $cwpad,
  $cwpos 
)
protected

Return the 253-state codeword.

Parameters
$cwpad(int) Pad codeword.
$cwpos(int) Number of data codewords from the beginning of encoded data.
Returns
pad codeword

Definition at line 444 of file datamatrix.php.

444 {
445 $pad = ($cwpad + (((149 * $cwpos) % 253) + 1));
446 if ($pad > 254) {
447 $pad -= 254;
448 }
449 return $pad;
450 }

Referenced by __construct().

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◆ get255StateCodeword()

Datamatrix::get255StateCodeword (   $cwpad,
  $cwpos 
)
protected

Return the 255-state codeword.

Parameters
$cwpad(int) Pad codeword.
$cwpos(int) Number of data codewords from the beginning of encoded data.
Returns
pad codeword

Definition at line 459 of file datamatrix.php.

459 {
460 $pad = ($cwpad + (((149 * $cwpos) % 255) + 1));
461 if ($pad > 255) {
462 $pad -= 256;
463 }
464 return $pad;
465 }

Referenced by getHighLevelEncoding().

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◆ getBarcodeArray()

Datamatrix::getBarcodeArray ( )

Returns a barcode array which is readable by TCPDF.

Returns
array barcode array readable by TCPDF;

Definition at line 350 of file datamatrix.php.

350 {
351 return $this->barcode_array;
352 }

References $barcode_array.

◆ getErrorCorrection()

Datamatrix::getErrorCorrection (   $wd,
  $nb,
  $nd,
  $nc,
  $gf = 256,
  $pp = 301 
)
protected

Add error correction codewords to data codewords array (ANNEX E).

Parameters
$wd(array) Array of datacodewords.
$nb(int) Number of blocks.
$nd(int) Number of data codewords per block.
$nc(int) Number of correction codewords per block.
$gf(int) numner of fields on log/antilog table (power of 2).
$pp(int) The value of its prime modulus polynomial (301 for ECC200).
Returns
array data codewords + error codewords

Definition at line 382 of file datamatrix.php.

382 {
383 // generate the log ($log) and antilog ($alog) tables
384 $log[0] = 0;
385 $alog[0] = 1;
386 for ($i = 1; $i < $gf; ++$i) {
387 $alog[$i] = ($alog[($i - 1)] * 2);
388 if ($alog[$i] >= $gf) {
389 $alog[$i] ^= $pp;
390 }
391 $log[$alog[$i]] = $i;
392 }
393 ksort($log);
394 // generate the polynomial coefficients (c)
395 $c = array_fill(0, ($nc + 1), 0);
396 $c[0] = 1;
397 for ($i = 1; $i <= $nc; ++$i) {
398 $c[$i] = $c[($i-1)];
399 for ($j = ($i - 1); $j >= 1; --$j) {
400 $c[$j] = $c[($j - 1)] ^ $this->getGFProduct($c[$j], $alog[$i], $log, $alog, $gf);
401 }
402 $c[0] = $this->getGFProduct($c[0], $alog[$i], $log, $alog, $gf);
403 }
404 ksort($c);
405 // total number of data codewords
406 $num_wd = ($nb * $nd);
407 // total number of error codewords
408 $num_we = ($nb * $nc);
409 // for each block
410 for ($b = 0; $b < $nb; ++$b) {
411 // create interleaved data block
412 $block = array();
413 for ($n = $b; $n < $num_wd; $n += $nb) {
414 $block[] = $wd[$n];
415 }
416 // initialize error codewords
417 $we = array_fill(0, ($nc + 1), 0);
418 // calculate error correction codewords for this block
419 for ($i = 0; $i < $nd; ++$i) {
420 $k = ($we[0] ^ $block[$i]);
421 for ($j = 0; $j < $nc; ++$j) {
422 $we[$j] = ($we[($j + 1)] ^ $this->getGFProduct($k, $c[($nc - $j - 1)], $log, $alog, $gf));
423 }
424 }
425 // add error codewords at the end of data codewords
426 $j = 0;
427 for ($i = $b; $i < $num_we; $i += $nb) {
428 $wd[($num_wd + $i)] = $we[$j];
429 ++$j;
430 }
431 }
432 // reorder codewords
433 ksort($wd);
434 return $wd;
435 }
$n
$n
Definition: RandomTest.php:80
Datamatrix\getGFProduct
getGFProduct($a, $b, $log, $alog, $gf)
Product of two numbers in a Power-of-Two Galois Field.
Definition: datamatrix.php:364
$log
$log
Definition: inc.setup_header.php:131

References $log, $n, $nd, and getGFProduct().

Referenced by __construct().

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◆ getGFProduct()

Datamatrix::getGFProduct (   $a,
  $b,
  $log,
  $alog,
  $gf 
)
protected

Product of two numbers in a Power-of-Two Galois Field.

Parameters
$a(int) first number to multiply.
$b(int) second number to multiply.
$log(array) Log table.
$alog(array) Anti-Log table.
$gf(array) Number of Factors of the Reed-Solomon polynomial.
Returns
int product

Definition at line 364 of file datamatrix.php.

364 {
365 if (($a == 0) OR ($b == 0)) {
366 return 0;
367 }
368 return ($alog[($log[$a] + $log[$b]) % ($gf - 1)]);
369 }

References $log.

Referenced by getErrorCorrection().

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◆ getHighLevelEncoding()

Datamatrix::getHighLevelEncoding (   $data)
protected

Get high level encoding using the minimum symbol data characters for ECC 200.

Parameters
$data(string) data to encode
Returns
array of codewords

Definition at line 702 of file datamatrix.php.

702 {
703 // STEP A. Start in ASCII encodation.
704 $enc = ENC_ASCII; // current encoding mode
705 $pos = 0; // current position
706 $cw = array(); // array of codewords to be returned
707 $cw_num = 0; // number of data codewords
708 $data_lenght = strlen($data); // number of chars
709 while ($pos < $data_lenght) {
710 switch ($enc) {
711 case ENC_ASCII: { // STEP B. While in ASCII encodation
712 if (($data_lenght > 1) AND ($pos < ($data_lenght - 1)) AND ($this->isCharMode(ord($data[$pos]), ENC_ASCII_NUM) AND $this->isCharMode(ord($data[$pos + 1]), ENC_ASCII_NUM))) {
713 // 1. If the next data sequence is at least 2 consecutive digits, encode the next two digits as a double digit in ASCII mode.
714 $cw[] = (intval(substr($data, $pos, 2)) + 130);
715 ++$cw_num;
716 $pos += 2;
717 } else {
718 // 2. If the look-ahead test (starting at step J) indicates another mode, switch to that mode.
719 $newenc = $this->lookAheadTest($data, $pos, $enc);
720 if ($newenc != $enc) {
721 // switch to new encoding
722 $enc = $newenc;
723 $cw[] = $this->getSwitchEncodingCodeword($enc);
724 ++$cw_num;
725 } else {
726 // get new byte
727 $chr = ord($data[$pos]);
728 ++$pos;
729 if ($this->isCharMode($chr, ENC_ASCII_EXT)) {
730 // 3. If the next data character is extended ASCII (greater than 127) encode it in ASCII mode first using the Upper Shift (value 235) character.
731 $cw[] = 235;
732 $cw[] = ($chr - 127);
733 $cw_num += 2;
734 } else {
735 // 4. Otherwise process the next data character in ASCII encodation.
736 $cw[] = ($chr + 1);
737 ++$cw_num;
738 }
739 }
740 }
741 break;
742 }
743 case ENC_C40 : // Upper-case alphanumeric
744 case ENC_TXT : // Lower-case alphanumeric
745 case ENC_X12 : { // ANSI X12
746 $temp_cw = array();
747 $p = 0;
748 $epos = $pos;
749 // get charset ID
750 $set_id = $this->chset_id[$enc];
751 // get basic charset for current encoding
752 $charset = $this->chset[$set_id];
753 do {
754 // 2. process the next character in C40 encodation.
755 $chr = ord($data[$epos]);
756 ++$epos;
757 // check for extended character
758 if ($chr & 0x80) {
759 if ($enc == ENC_X12) {
760 return false;
761 }
762 $chr = ($chr & 0x7f);
763 $temp_cw[] = 1; // shift 2
764 $temp_cw[] = 30; // upper shift
765 $p += 2;
766 }
767 if (isset($charset[$chr])) {
768 $temp_cw[] = $charset[$chr];
769 ++$p;
770 } else {
771 if (isset($this->chset['SH1'][$chr])) {
772 $temp_cw[] = 0; // shift 1
773 $shiftset = $this->chset['SH1'];
774 } elseif (isset($chr, $this->chset['SH2'][$chr])) {
775 $temp_cw[] = 1; // shift 2
776 $shiftset = $this->chset['SH2'];
777 } elseif (($enc == ENC_C40) AND isset($this->chset['S3C'][$chr])) {
778 $temp_cw[] = 2; // shift 3
779 $shiftset = $this->chset['S3C'];
780 } elseif (($enc == ENC_TXT) AND isset($this->chset['S3T'][$chr])) {
781 $temp_cw[] = 2; // shift 3
782 $shiftset = $this->chset['S3T'];
783 } else {
784 return false;
785 }
786 $temp_cw[] = $shiftset[$chr];
787 $p += 2;
788 }
789 if ($p >= 3) {
790 $c1 = array_shift($temp_cw);
791 $c2 = array_shift($temp_cw);
792 $c3 = array_shift($temp_cw);
793 $p -= 3;
794 $tmp = ((1600 * $c1) + (40 * $c2) + $c3 + 1);
795 $cw[] = ($tmp >> 8);
796 $cw[] = ($tmp % 256);
797 $cw_num += 2;
798 $pos = $epos;
799 // 1. If the C40 encoding is at the point of starting a new double symbol character and if the look-ahead test (starting at step J) indicates another mode, switch to that mode.
800 $newenc = $this->lookAheadTest($data, $pos, $enc);
801 if ($newenc != $enc) {
802 $enc = $newenc;
803 $cw[] = $this->getSwitchEncodingCodeword($enc);
804 ++$cw_num;
805 $pos -= $p;
806 $p = 0;
807 break;
808 }
809 }
810 } while (($p > 0) AND ($epos < $data_lenght));
811 // process last data (if any)
812 if ($p > 0) {
813 // get remaining number of data symbols
814 $cwr = ($this->getMaxDataCodewords($cw_num + 2) - $cw_num);
815 if (($cwr == 1) AND ($p == 1)) {
816 // d. If one symbol character remains and one C40 value (data character) remains to be encoded
817 $c1 = array_shift($temp_cw);
818 --$p;
819 $cw[] = ($c1 + 1);
820 ++$cw_num;
821 } elseif (($cwr == 2) AND ($p == 1)) {
822 // c. If two symbol characters remain and only one C40 value (data character) remains to be encoded
823 $c1 = array_shift($temp_cw);
824 --$p;
825 $cw[] = 254;
826 $cw[] = ($c1 + 1);
827 $cw_num += 2;
828 } elseif (($cwr == 2) AND ($p == 2)) {
829 // b. If two symbol characters remain and two C40 values remain to be encoded
830 $c1 = array_shift($temp_cw);
831 $c2 = array_shift($temp_cw);
832 $p -= 2;
833 $tmp = ((1600 * $c1) + (40 * $c2) + 1);
834 $cw[] = ($tmp >> 8);
835 $cw[] = ($tmp % 256);
836 $cw_num += 2;
837 } else {
838 // switch to ASCII encoding
839 if ($enc != ENC_ASCII) {
840 $enc = ENC_ASCII;
841 $cw[] = $this->getSwitchEncodingCodeword($enc);
842 ++$cw_num;
843 }
844 }
845 }
846 break;
847 }
848 case ENC_EDF: { // F. While in EDIFACT (EDF) encodation
849 // initialize temporary array with 0 lenght
850 $temp_cw = array();
851 $epos = $pos;
852 $field_lenght = 0;
853 $newenc = $enc;
854 do {
855 // 2. process the next character in EDIFACT encodation.
856 $chr = ord($data[$epos]);
857 if ($this->isCharMode($chr, ENC_EDF)) {
858 ++$epos;
859 $temp_cw[] = $chr;
860 ++$field_lenght;
861 }
862 if (($field_lenght == 4) OR ($epos == $data_lenght) OR !$this->isCharMode($chr, ENC_EDF)) {
863 if ($field_lenght < 4) {
864 // set unlatch character
865 $temp_cw[] = 0x1f;
866 ++$field_lenght;
867 // fill empty characters
868 for ($i = $field_lenght; $i < 4; ++$i) {
869 $temp_cw[] = 0;
870 }
871 $enc = ENC_ASCII;
872 }
873 // encodes four data characters in three codewords
874 $tcw = (($temp_cw[0] & 0x3F) << 2) + (($temp_cw[1] & 0x30) >> 4);
875 if ($tcw > 0) {
876 $cw[] = $tcw;
877 $cw_num++;
878 }
879 $tcw= (($temp_cw[1] & 0x0F) << 4) + (($temp_cw[2] & 0x3C) >> 2);
880 if ($tcw > 0) {
881 $cw[] = $tcw;
882 $cw_num++;
883 }
884 $tcw = (($temp_cw[2] & 0x03) << 6) + ($temp_cw[3] & 0x3F);
885 if ($tcw > 0) {
886 $cw[] = $tcw;
887 $cw_num++;
888 }
889 $temp_cw = array();
890 $pos = $epos;
891 $field_lenght = 0;
892 if ($enc == ENC_ASCII) {
893 break; // exit from EDIFACT mode
894 }
895 }
896 } while ($epos < $data_lenght);
897 break;
898 }
899 case ENC_BASE256: { // G. While in Base 256 (B256) encodation
900 // initialize temporary array with 0 lenght
901 $temp_cw = array();
902 $field_lenght = 0;
903 while (($pos < $data_lenght) AND ($field_lenght <= 1555)) {
904 $newenc = $this->lookAheadTest($data, $pos, $enc);
905 if ($newenc != $enc) {
906 // 1. If the look-ahead test (starting at step J) indicates another mode, switch to that mode.
907 $enc = $newenc;
908 $cw[] = $this->getSwitchEncodingCodeword($enc);
909 ++$cw_num;
910 break; // exit from B256 mode
911 } else {
912 // 2. Otherwise, process the next character in Base 256 encodation.
913 $chr = ord($data[$pos]);
914 ++$pos;
915 $temp_cw[] = $chr;
916 ++$field_lenght;
917 }
918 }
919 // set field lenght
920 if ($field_lenght <= 249) {
921 $cw[] = $field_lenght;
922 ++$cw_num;
923 } else {
924 $cw[] = (floor($field_lenght / 250) + 249);
925 $cw[] = ($field_lenght % 250);
926 $cw_num += 2;
927 }
928 if (!empty($temp_cw)) {
929 // add B256 field
930 foreach ($temp_cw as $p => $cht) {
931 $cw[] = $this->get255StateCodeword($chr, ($cw_num + $p));
932 }
933 }
934 break;
935 }
936 } // end of switch enc
937 } // end of while
938 // set last used encoding
939 $this->last_enc = $enc;
940 return $cw;
941 }
Datamatrix\getMaxDataCodewords
getMaxDataCodewords($numcw)
Choose the minimum matrix size and return the max number of data codewords.
Definition: datamatrix.php:687
Datamatrix\lookAheadTest
lookAheadTest($data, $pos, $mode)
The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S).
Definition: datamatrix.php:521
Datamatrix\getSwitchEncodingCodeword
getSwitchEncodingCodeword($mode)
Get the switching codeword to a new encoding mode (latch codeword)
Definition: datamatrix.php:651
Datamatrix\get255StateCodeword
get255StateCodeword($cwpad, $cwpos)
Return the 255-state codeword.
Definition: datamatrix.php:459
Datamatrix\isCharMode
isCharMode($chr, $mode)
Returns true if the char belongs to the selected mode.
Definition: datamatrix.php:474
ENC_ASCII_NUM
const ENC_ASCII_NUM
ASCII number encoding: ASCII digits (2 bytes per CW)
Definition: datamatrix.php:99
ENC_C40
const ENC_C40
C40 encoding: Upper-case alphanumeric (3/2 bytes per CW)
Definition: datamatrix.php:69
ENC_ASCII_EXT
const ENC_ASCII_EXT
ASCII extended encoding: ASCII character 128 to 255 (1/2 byte per CW)
Definition: datamatrix.php:94
ENC_X12
const ENC_X12
X12 encoding: ANSI X12 (3/2 byte per CW)
Definition: datamatrix.php:79
ENC_TXT
const ENC_TXT
TEXT encoding: Lower-case alphanumeric (3/2 bytes per CW)
Definition: datamatrix.php:74

References $data, ENC_ASCII, ENC_ASCII_EXT, ENC_ASCII_NUM, ENC_BASE256, ENC_C40, ENC_EDF, ENC_TXT, ENC_X12, get255StateCodeword(), getMaxDataCodewords(), getSwitchEncodingCodeword(), isCharMode(), and lookAheadTest().

Referenced by __construct().

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◆ getMaxDataCodewords()

Datamatrix::getMaxDataCodewords (   $numcw)
protected

Choose the minimum matrix size and return the max number of data codewords.

Parameters
$numcw(int) Number of current codewords.
Returns
number of data codewords in matrix

Definition at line 687 of file datamatrix.php.

687 {
688 foreach ($this->symbattr as $key => $matrix) {
689 if ($matrix[11] >= $numcw) {
690 return $matrix[11];
691 }
692 }
693 return 0;
694 }

Referenced by getHighLevelEncoding().

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◆ getPlacementMap()

Datamatrix::getPlacementMap (   $nrow,
  $ncol 
)
protected

Build a placement map.

(Annex F - ECC 200 symbol character placement)

Parameters
$nrow(int) Number of rows.
$ncol(int) Number of columns.
Returns
array

Definition at line 1089 of file datamatrix.php.

1089 {
1090 // initialize array with zeros
1091 $marr = array_fill(0, ($nrow * $ncol), 0);
1092 // set starting values
1093 $chr = 1;
1094 $row = 4;
1095 $col = 0;
1096 do {
1097 // repeatedly first check for one of the special corner cases, then
1098 if (($row == $nrow) AND ($col == 0)) {
1099 $marr = $this->placeCornerA($marr, $nrow, $ncol, $chr);
1100 ++$chr;
1101 }
1102 if (($row == ($nrow - 2)) AND ($col == 0) AND ($ncol % 4)) {
1103 $marr = $this->placeCornerB($marr, $nrow, $ncol, $chr);
1104 ++$chr;
1105 }
1106 if (($row == ($nrow - 2)) AND ($col == 0) AND (($ncol % 8) == 4)) {
1107 $marr = $this->placeCornerC($marr, $nrow, $ncol, $chr);
1108 ++$chr;
1109 }
1110 if (($row == ($nrow + 4)) AND ($col == 2) AND (!($ncol % 8))) {
1111 $marr = $this->placeCornerD($marr, $nrow, $ncol, $chr);
1112 ++$chr;
1113 }
1114 // sweep upward diagonally, inserting successive characters,
1115 do {
1116 if (($row < $nrow) AND ($col >= 0) AND (!$marr[(($row * $ncol) + $col)])) {
1117 $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr);
1118 ++$chr;
1119 }
1120 $row -= 2;
1121 $col += 2;
1122 } while (($row >= 0) AND ($col < $ncol));
1123 ++$row;
1124 $col += 3;
1125 // & then sweep downward diagonally, inserting successive characters,...
1126 do {
1127 if (($row >= 0) AND ($col < $ncol) AND (!$marr[(($row * $ncol) + $col)])) {
1128 $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr);
1129 ++$chr;
1130 }
1131 $row += 2;
1132 $col -= 2;
1133 } while (($row < $nrow) AND ($col >= 0));
1134 $row += 3;
1135 ++$col;
1136 // ... until the entire array is scanned
1137 } while (($row < $nrow) OR ($col < $ncol));
1138 // lastly, if the lower righthand corner is untouched, fill in fixed pattern
1139 if (!$marr[(($nrow * $ncol) - 1)]) {
1140 $marr[(($nrow * $ncol) - 1)] = 1;
1141 $marr[(($nrow * $ncol) - $ncol - 2)] = 1;
1142 }
1143 return $marr;
1144 }
Datamatrix\placeCornerD
placeCornerD($marr, $nrow, $ncol, $chr)
Places the 8 bits of the fourth special corner case.
Definition: datamatrix.php:1069
Datamatrix\placeUtah
placeUtah($marr, $nrow, $ncol, $row, $col, $chr)
Places the 8 bits of a utah-shaped symbol character.
Definition: datamatrix.php:981
Datamatrix\placeCornerA
placeCornerA($marr, $nrow, $ncol, $chr)
Places the 8 bits of the first special corner case.
Definition: datamatrix.php:1003
Datamatrix\placeCornerC
placeCornerC($marr, $nrow, $ncol, $chr)
Places the 8 bits of the third special corner case.
Definition: datamatrix.php:1047
Datamatrix\placeCornerB
placeCornerB($marr, $nrow, $ncol, $chr)
Places the 8 bits of the second special corner case.
Definition: datamatrix.php:1025

References $row, placeCornerA(), placeCornerB(), placeCornerC(), placeCornerD(), and placeUtah().

Referenced by __construct().

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◆ getSwitchEncodingCodeword()

Datamatrix::getSwitchEncodingCodeword (   $mode)
protected

Get the switching codeword to a new encoding mode (latch codeword)

Parameters
$mode(int) New encoding mode.
Returns
(int) Switch codeword.

Definition at line 651 of file datamatrix.php.

651 {
652 switch ($mode) {
653 case ENC_ASCII: { // ASCII character 0 to 127
654 $cw = 254;
655 break;
656 }
657 case ENC_C40: { // Upper-case alphanumeric
658 $cw = 230;
659 break;
660 }
661 case ENC_TXT: { // Lower-case alphanumeric
662 $cw = 239;
663 break;
664 }
665 case ENC_X12: { // ANSI X12
666 $cw = 238;
667 break;
668 }
669 case ENC_EDF: { // ASCII character 32 to 94
670 $cw = 240;
671 break;
672 }
673 case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page)
674 $cw = 231;
675 break;
676 }
677 }
678 return $cw;
679 }

References ENC_ASCII, ENC_BASE256, ENC_C40, ENC_EDF, ENC_TXT, and ENC_X12.

Referenced by getHighLevelEncoding().

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◆ isCharMode()

Datamatrix::isCharMode (   $chr,
  $mode 
)
protected

Returns true if the char belongs to the selected mode.

Parameters
$chr(int) Character (byte) to check.
$mode(int) Current encoding mode.
Returns
boolean true if the char is of the selected mode.

Definition at line 474 of file datamatrix.php.

474 {
475 $status = false;
476 switch ($mode) {
477 case ENC_ASCII: { // ASCII character 0 to 127
478 $status = (($chr >= 0) AND ($chr <= 127));
479 break;
480 }
481 case ENC_C40: { // Upper-case alphanumeric
482 $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 65) AND ($chr <= 90)));
483 break;
484 }
485 case ENC_TXT: { // Lower-case alphanumeric
486 $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 97) AND ($chr <= 122)));
487 break;
488 }
489 case ENC_X12: { // ANSI X12
490 $status = (($chr == 13) OR ($chr == 42) OR ($chr == 62));
491 break;
492 }
493 case ENC_EDF: { // ASCII character 32 to 94
494 $status = (($chr >= 32) AND ($chr <= 94));
495 break;
496 }
497 case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page)
498 $status = (($chr == 232) OR ($chr == 233) OR ($chr == 234) OR ($chr == 241));
499 break;
500 }
501 case ENC_ASCII_EXT: { // ASCII character 128 to 255
502 $status = (($chr >= 128) AND ($chr <= 255));
503 break;
504 }
505 case ENC_ASCII_NUM: { // ASCII digits
506 $status = (($chr >= 48) AND ($chr <= 57));
507 break;
508 }
509 }
510 return $status;
511 }

References ENC_ASCII, ENC_ASCII_EXT, ENC_ASCII_NUM, ENC_BASE256, ENC_C40, ENC_EDF, ENC_TXT, and ENC_X12.

Referenced by getHighLevelEncoding(), and lookAheadTest().

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◆ lookAheadTest()

Datamatrix::lookAheadTest (   $data,
  $pos,
  $mode 
)
protected

The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S).

Parameters
$data(string) data to encode
$pos(int) current position
$mode(int) current encoding mode
Returns
int encoding mode

Definition at line 521 of file datamatrix.php.

521 {
522 $data_length = strlen($data);
523 if ($pos >= $data_length) {
524 return $mode;
525 }
526 $charscount = 0; // count processed chars
527 // STEP J
528 if ($mode == ENC_ASCII) {
529 $numch = array(0, 1, 1, 1, 1, 1.25);
530 } else {
531 $numch = array(1, 2, 2, 2, 2, 2.25);
532 $numch[$mode] = 0;
533 }
534 while (true) {
535 // STEP K
536 if (($pos + $charscount) == $data_length) {
537 if ($numch[ENC_ASCII] <= ceil(min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
538 return ENC_ASCII;
539 }
540 if ($numch[ENC_BASE256] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) {
541 return ENC_BASE256;
542 }
543 if ($numch[ENC_EDF] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256]))) {
544 return ENC_EDF;
545 }
546 if ($numch[ENC_TXT] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
547 return ENC_TXT;
548 }
549 if ($numch[ENC_X12] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
550 return ENC_X12;
551 }
552 return ENC_C40;
553 }
554 // get char
555 $chr = ord($data[$pos + $charscount]);
556 $charscount++;
557 // STEP L
558 if ($this->isCharMode($chr, ENC_ASCII_NUM)) {
559 $numch[ENC_ASCII] += (1 / 2);
560 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
561 $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]);
562 $numch[ENC_ASCII] += 2;
563 } else {
564 $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]);
565 $numch[ENC_ASCII] += 1;
566 }
567 // STEP M
568 if ($this->isCharMode($chr, ENC_C40)) {
569 $numch[ENC_C40] += (2 / 3);
570 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
571 $numch[ENC_C40] += (8 / 3);
572 } else {
573 $numch[ENC_C40] += (4 / 3);
574 }
575 // STEP N
576 if ($this->isCharMode($chr, ENC_TXT)) {
577 $numch[ENC_TXT] += (2 / 3);
578 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
579 $numch[ENC_TXT] += (8 / 3);
580 } else {
581 $numch[ENC_TXT] += (4 / 3);
582 }
583 // STEP O
584 if ($this->isCharMode($chr, ENC_X12) OR $this->isCharMode($chr, ENC_C40)) {
585 $numch[ENC_X12] += (2 / 3);
586 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
587 $numch[ENC_X12] += (13 / 3);
588 } else {
589 $numch[ENC_X12] += (10 / 3);
590 }
591 // STEP P
592 if ($this->isCharMode($chr, ENC_EDF)) {
593 $numch[ENC_EDF] += (3 / 4);
594 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
595 $numch[ENC_EDF] += (17 / 4);
596 } else {
597 $numch[ENC_EDF] += (13 / 4);
598 }
599 // STEP Q
600 if ($this->isCharMode($chr, ENC_BASE256)) {
601 $numch[ENC_BASE256] += 4;
602 } else {
603 $numch[ENC_BASE256] += 1;
604 }
605 // STEP R
606 if ($charscount >= 4) {
607 if (($numch[ENC_ASCII] + 1) <= min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) {
608 return ENC_ASCII;
609 }
610 if ((($numch[ENC_BASE256] + 1) <= $numch[ENC_ASCII])
611 OR (($numch[ENC_BASE256] + 1) < min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) {
612 return ENC_BASE256;
613 }
614 if (($numch[ENC_EDF] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256])) {
615 return ENC_EDF;
616 }
617 if (($numch[ENC_TXT] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) {
618 return ENC_TXT;
619 }
620 if (($numch[ENC_X12] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) {
621 return ENC_X12;
622 }
623 if (($numch[ENC_C40] + 1) < min($numch[ENC_ASCII], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) {
624 if ($numch[ENC_C40] < $numch[ENC_X12]) {
625 return ENC_C40;
626 }
627 if ($numch[ENC_C40] == $numch[ENC_X12]) {
628 $k = ($pos + $charscount + 1);
629 while ($k < $data_length) {
630 $tmpchr = ord($data{$k});
631 if ($this->isCharMode($tmpchr, ENC_X12)) {
632 return ENC_X12;
633 } elseif (!($this->isCharMode($tmpchr, ENC_X12) OR $this->isCharMode($tmpchr, ENC_C40))) {
634 break;
635 }
636 ++$k;
637 }
638 return ENC_C40;
639 }
640 }
641 }
642 } // end of while
643 }

References $data, ENC_ASCII, ENC_ASCII_EXT, ENC_ASCII_NUM, ENC_BASE256, ENC_C40, ENC_EDF, ENC_TXT, ENC_X12, and isCharMode().

Referenced by getHighLevelEncoding().

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◆ placeCornerA()

Datamatrix::placeCornerA (   $marr,
  $nrow,
  $ncol,
  $chr 
)
protected

Places the 8 bits of the first special corner case.

(Annex F - ECC 200 symbol character placement)

Parameters
$marr(array) Array of symbols.
$nrow(int) Number of rows.
$ncol(int) Number of columns.
$chr(int) Char byte.
Returns
array

Definition at line 1003 of file datamatrix.php.

1003 {
1004 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1);
1005 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 1, $chr, 2);
1006 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 2, $chr, 3);
1007 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4);
1008 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5);
1009 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6);
1010 $marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7);
1011 $marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8);
1012 return $marr;
1013 }
Datamatrix\placeModule
placeModule($marr, $nrow, $ncol, $row, $col, $chr, $bit)
Places "chr+bit" with appropriate wrapping within array[].
Definition: datamatrix.php:956

References placeModule().

Referenced by getPlacementMap().

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◆ placeCornerB()

Datamatrix::placeCornerB (   $marr,
  $nrow,
  $ncol,
  $chr 
)
protected

Places the 8 bits of the second special corner case.

(Annex F - ECC 200 symbol character placement)

Parameters
$marr(array) Array of symbols.
$nrow(int) Number of rows.
$ncol(int) Number of columns.
$chr(int) Char byte.
Returns
array

Definition at line 1025 of file datamatrix.php.

1025 {
1026 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1);
1027 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2);
1028 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3);
1029 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-4, $chr, 4);
1030 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 5);
1031 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 6);
1032 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 7);
1033 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8);
1034 return $marr;
1035 }

References placeModule().

Referenced by getPlacementMap().

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◆ placeCornerC()

Datamatrix::placeCornerC (   $marr,
  $nrow,
  $ncol,
  $chr 
)
protected

Places the 8 bits of the third special corner case.

(Annex F - ECC 200 symbol character placement)

Parameters
$marr(array) Array of symbols.
$nrow(int) Number of rows.
$ncol(int) Number of columns.
$chr(int) Char byte.
Returns
array

Definition at line 1047 of file datamatrix.php.

1047 {
1048 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1);
1049 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2);
1050 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3);
1051 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4);
1052 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5);
1053 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6);
1054 $marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7);
1055 $marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8);
1056 return $marr;
1057 }

References placeModule().

Referenced by getPlacementMap().

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◆ placeCornerD()

Datamatrix::placeCornerD (   $marr,
  $nrow,
  $ncol,
  $chr 
)
protected

Places the 8 bits of the fourth special corner case.

(Annex F - ECC 200 symbol character placement)

Parameters
$marr(array) Array of symbols.
$nrow(int) Number of rows.
$ncol(int) Number of columns.
$chr(int) Char byte.
Returns
array

Definition at line 1069 of file datamatrix.php.

1069 {
1070 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1);
1071 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, $ncol-1, $chr, 2);
1072 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 3);
1073 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4);
1074 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5);
1075 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-3, $chr, 6);
1076 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-2, $chr, 7);
1077 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8);
1078 return $marr;
1079 }

References placeModule().

Referenced by getPlacementMap().

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◆ placeModule()

Datamatrix::placeModule (   $marr,
  $nrow,
  $ncol,
  $row,
  $col,
  $chr,
  $bit 
)
protected

Places "chr+bit" with appropriate wrapping within array[].

(Annex F - ECC 200 symbol character placement)

Parameters
$marr(array) Array of symbols.
$nrow(int) Number of rows.
$ncol(int) Number of columns.
$row(int) Row number.
$col(int) Column number.
$chr(int) Char byte.
$bit(int) Bit.
Returns
array

Definition at line 956 of file datamatrix.php.

956 {
957 if ($row < 0) {
958 $row += $nrow;
959 $col += (4 - (($nrow + 4) % 8));
960 }
961 if ($col < 0) {
962 $col += $ncol;
963 $row += (4 - (($ncol + 4) % 8));
964 }
965 $marr[(($row * $ncol) + $col)] = ((10 * $chr) + $bit);
966 return $marr;
967 }

References $row.

Referenced by placeCornerA(), placeCornerB(), placeCornerC(), placeCornerD(), and placeUtah().

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◆ placeUtah()

Datamatrix::placeUtah (   $marr,
  $nrow,
  $ncol,
  $row,
  $col,
  $chr 
)
protected

Places the 8 bits of a utah-shaped symbol character.

(Annex F - ECC 200 symbol character placement)

Parameters
$marr(array) Array of symbols.
$nrow(int) Number of rows.
$ncol(int) Number of columns.
$row(int) Row number.
$col(int) Column number.
$chr(int) Char byte.
Returns
array

Definition at line 981 of file datamatrix.php.

981 {
982 $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-2, $chr, 1);
983 $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-1, $chr, 2);
984 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-2, $chr, 3);
985 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-1, $chr, 4);
986 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col, $chr, 5);
987 $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-2, $chr, 6);
988 $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-1, $chr, 7);
989 $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col, $chr, 8);
990 return $marr;
991 }

References $row, and placeModule().

Referenced by getPlacementMap().

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Field Documentation

◆ $barcode_array

Datamatrix::$barcode_array = array()
protected

Barcode array to be returned which is readable by TCPDF.

Definition at line 116 of file datamatrix.php.

Referenced by __construct(), and getBarcodeArray().

◆ $chset

Datamatrix::$chset
protected

Basic set of characters for each encodation mode.

Definition at line 190 of file datamatrix.php.

◆ $chset_id

Datamatrix::$chset_id = array(ENC_C40 => 'C40', ENC_TXT => 'TXT', ENC_X12 =>'X12')
protected

Map encodation modes whit character sets.

Definition at line 184 of file datamatrix.php.

◆ $last_enc

Datamatrix::$last_enc = ENC_ASCII
protected

Store last used encoding for data codewords.

Definition at line 122 of file datamatrix.php.

◆ $symbattr

Datamatrix::$symbattr
protected

Table of Data Matrix ECC 200 Symbol Attributes:

  • total matrix rows (including finder pattern)
  • total matrix cols (including finder pattern)
  • total matrix rows (without finder pattern)
  • total matrix cols (without finder pattern)
  • region data rows (with finder pattern)
  • region data col (with finder pattern)
  • region data rows (without finder pattern)
  • region data col (without finder pattern)
  • horizontal regions
  • vertical regions
  • regions
  • data codewords
  • error codewords
  • blocks
  • data codewords per block
  • error codewords per block

Definition at line 145 of file datamatrix.php.

The documentation for this class was generated from the following file: