ILIAS  release_5-1 Revision 5.0.0-5477-g43f3e3fab5f
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] > $nd) {
258 // add padding
259 if ((($params[11] - $nd) > 1) AND ($cw[($nd - 1)] != 254)) {
260 if ($this->last_enc == ENC_EDF) {
261 // switch to ASCII encoding
262 $cw[] = 124;
263 ++$nd;
264 } elseif (($this->last_enc != ENC_ASCII) AND ($this->last_enc != ENC_BASE256)) {
265 // switch to ASCII encoding
266 $cw[] = 254;
267 ++$nd;
268 }
269 }
270 if ($params[11] > $nd) {
271 // add first pad
272 $cw[] = 129;
273 ++$nd;
274 // add remaining pads
275 for ($i = $nd; $i < $params[11]; ++$i) {
276 $cw[] = $this->get253StateCodeword(129, $i);
277 }
278 }
279 }
280 // add error correction codewords
281 $cw = $this->getErrorCorrection($cw, $params[13], $params[14], $params[15]);
282 // initialize empty arrays
283 $grid = array_fill(0, ($params[2] * $params[3]), 0);
284 // get placement map
285 $places = $this->getPlacementMap($params[2], $params[3]);
286 // fill the grid with data
287 $grid = array();
288 $i = 0;
289 // region data row max index
290 $rdri = ($params[4] - 1);
291 // region data column max index
292 $rdci = ($params[5] - 1);
293 // for each vertical region
294 for ($vr = 0; $vr < $params[9]; ++$vr) {
295 // for each row on region
296 for ($r = 0; $r < $params[4]; ++$r) {
297 // get row
298 $row = (($vr * $params[4]) + $r);
299 // for each horizontal region
300 for ($hr = 0; $hr < $params[8]; ++$hr) {
301 // for each column on region
302 for ($c = 0; $c < $params[5]; ++$c) {
303 // get column
304 $col = (($hr * $params[5]) + $c);
305 // braw bits by case
306 if ($r == 0) {
307 // top finder pattern
308 if ($c % 2) {
309 $grid[$row][$col] = 0;
310 } else {
311 $grid[$row][$col] = 1;
312 }
313 } elseif ($r == $rdri) {
314 // bottom finder pattern
315 $grid[$row][$col] = 1;
316 } elseif ($c == 0) {
317 // left finder pattern
318 $grid[$row][$col] = 1;
319 } elseif ($c == $rdci) {
320 // right finder pattern
321 if ($r % 2) {
322 $grid[$row][$col] = 1;
323 } else {
324 $grid[$row][$col] = 0;
325 }
326 } else { // data bit
327 if ($places[$i] < 2) {
328 $grid[$row][$col] = $places[$i];
329 } else {
330 // codeword ID
331 $cw_id = (floor($places[$i] / 10) - 1);
332 // codeword BIT mask
333 $cw_bit = pow(2, (8 - ($places[$i] % 10)));
334 $grid[$row][$col] = (($cw[$cw_id] & $cw_bit) == 0) ? 0 : 1;
335 }
336 ++$i;
337 }
338 }
339 }
340 }
341 }
342 $this->barcode_array['num_rows'] = $params[0];
343 $this->barcode_array['num_cols'] = $params[1];
344 $this->barcode_array['bcode'] = $grid;
345 }
Datamatrix\getPlacementMap
getPlacementMap($nrow, $ncol)
Build a placement map.
Definition: datamatrix.php:1116
Datamatrix\get253StateCodeword
get253StateCodeword($cwpad, $cwpos)
Return the 253-state codeword.
Definition: datamatrix.php:446
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:707
Datamatrix\getErrorCorrection
getErrorCorrection($wd, $nb, $nd, $nc, $gf=256, $pp=301)
Add error correction codewords to data codewords array (ANNEX E).
Definition: datamatrix.php:384
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:11
$r
$r
Definition: example_031.php:79
$params
$params
Definition: example_049.php:96
$code
$code
Definition: example_050.php:99

References $barcode_array, $code, $nd, $params, $r, $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 446 of file datamatrix.php.

446 {
447 $pad = ($cwpad + (((149 * $cwpos) % 253) + 1));
448 if ($pad > 254) {
449 $pad -= 254;
450 }
451 return $pad;
452 }

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 461 of file datamatrix.php.

461 {
462 $pad = ($cwpad + (((149 * $cwpos) % 255) + 1));
463 if ($pad > 255) {
464 $pad -= 256;
465 }
466 return $pad;
467 }

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 352 of file datamatrix.php.

352 {
353 return $this->barcode_array;
354 }

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 384 of file datamatrix.php.

384 {
385 // generate the log ($log) and antilog ($alog) tables
386 $log[0] = 0;
387 $alog[0] = 1;
388 for ($i = 1; $i < $gf; ++$i) {
389 $alog[$i] = ($alog[($i - 1)] * 2);
390 if ($alog[$i] >= $gf) {
391 $alog[$i] ^= $pp;
392 }
393 $log[$alog[$i]] = $i;
394 }
395 ksort($log);
396 // generate the polynomial coefficients (c)
397 $c = array_fill(0, ($nc + 1), 0);
398 $c[0] = 1;
399 for ($i = 1; $i <= $nc; ++$i) {
400 $c[$i] = $c[($i-1)];
401 for ($j = ($i - 1); $j >= 1; --$j) {
402 $c[$j] = $c[($j - 1)] ^ $this->getGFProduct($c[$j], $alog[$i], $log, $alog, $gf);
403 }
404 $c[0] = $this->getGFProduct($c[0], $alog[$i], $log, $alog, $gf);
405 }
406 ksort($c);
407 // total number of data codewords
408 $num_wd = ($nb * $nd);
409 // total number of error codewords
410 $num_we = ($nb * $nc);
411 // for each block
412 for ($b = 0; $b < $nb; ++$b) {
413 // create interleaved data block
414 $block = array();
415 for ($n = $b; $n < $num_wd; $n += $nb) {
416 $block[] = $wd[$n];
417 }
418 // initialize error codewords
419 $we = array_fill(0, ($nc + 1), 0);
420 // calculate error correction codewords for this block
421 for ($i = 0; $i < $nd; ++$i) {
422 $k = ($we[0] ^ $block[$i]);
423 for ($j = 0; $j < $nc; ++$j) {
424 $we[$j] = ($we[($j + 1)] ^ $this->getGFProduct($k, $c[($nc - $j - 1)], $log, $alog, $gf));
425 }
426 }
427 // add error codewords at the end of data codewords
428 $j = 0;
429 for ($i = $b; $i < $num_we; $i += $nb) {
430 $wd[($num_wd + $i)] = $we[$j];
431 ++$j;
432 }
433 }
434 // reorder codewords
435 ksort($wd);
436 return $wd;
437 }
$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:366
$log
$log
Definition: inc.setup_header.php:135

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 366 of file datamatrix.php.

366 {
367 if (($a == 0) OR ($b == 0)) {
368 return 0;
369 }
370 return ($alog[($log[$a] + $log[$b]) % ($gf - 1)]);
371 }

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 707 of file datamatrix.php.

707 {
708 // STEP A. Start in ASCII encodation.
709 $enc = ENC_ASCII; // current encoding mode
710 $pos = 0; // current position
711 $cw = array(); // array of codewords to be returned
712 $cw_num = 0; // number of data codewords
713 $data_length = strlen($data); // number of chars
714 while ($pos < $data_length) {
715 // set last used encoding
716 $this->last_enc = $enc;
717 switch ($enc) {
718 case ENC_ASCII: { // STEP B. While in ASCII encodation
719 if (($data_length > 1) AND ($pos < ($data_length - 1)) AND ($this->isCharMode(ord($data[$pos]), ENC_ASCII_NUM) AND $this->isCharMode(ord($data[$pos + 1]), ENC_ASCII_NUM))) {
720 // 1. If the next data sequence is at least 2 consecutive digits, encode the next two digits as a double digit in ASCII mode.
721 $cw[] = (intval(substr($data, $pos, 2)) + 130);
722 ++$cw_num;
723 $pos += 2;
724 } else {
725 // 2. If the look-ahead test (starting at step J) indicates another mode, switch to that mode.
726 $newenc = $this->lookAheadTest($data, $pos, $enc);
727 if ($newenc != $enc) {
728 // switch to new encoding
729 $enc = $newenc;
730 $cw[] = $this->getSwitchEncodingCodeword($enc);
731 ++$cw_num;
732 } else {
733 // get new byte
734 $chr = ord($data[$pos]);
735 ++$pos;
736 if ($this->isCharMode($chr, ENC_ASCII_EXT)) {
737 // 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.
738 $cw[] = 235;
739 $cw[] = ($chr - 127);
740 $cw_num += 2;
741 } else {
742 // 4. Otherwise process the next data character in ASCII encodation.
743 $cw[] = ($chr + 1);
744 ++$cw_num;
745 }
746 }
747 }
748 break;
749 }
750 case ENC_C40 : // Upper-case alphanumeric
751 case ENC_TXT : // Lower-case alphanumeric
752 case ENC_X12 : { // ANSI X12
753 $temp_cw = array();
754 $p = 0;
755 $epos = $pos;
756 // get charset ID
757 $set_id = $this->chset_id[$enc];
758 // get basic charset for current encoding
759 $charset = $this->chset[$set_id];
760 do {
761 // 2. process the next character in C40 encodation.
762 $chr = ord($data[$epos]);
763 ++$epos;
764 // check for extended character
765 if ($chr & 0x80) {
766 if ($enc == ENC_X12) {
767 return false;
768 }
769 $chr = ($chr & 0x7f);
770 $temp_cw[] = 1; // shift 2
771 $temp_cw[] = 30; // upper shift
772 $p += 2;
773 }
774 if (isset($charset[$chr])) {
775 $temp_cw[] = $charset[$chr];
776 ++$p;
777 } else {
778 if (isset($this->chset['SH1'][$chr])) {
779 $temp_cw[] = 0; // shift 1
780 $shiftset = $this->chset['SH1'];
781 } elseif (isset($chr, $this->chset['SH2'][$chr])) {
782 $temp_cw[] = 1; // shift 2
783 $shiftset = $this->chset['SH2'];
784 } elseif (($enc == ENC_C40) AND isset($this->chset['S3C'][$chr])) {
785 $temp_cw[] = 2; // shift 3
786 $shiftset = $this->chset['S3C'];
787 } elseif (($enc == ENC_TXT) AND isset($this->chset['S3T'][$chr])) {
788 $temp_cw[] = 2; // shift 3
789 $shiftset = $this->chset['S3T'];
790 } else {
791 return false;
792 }
793 $temp_cw[] = $shiftset[$chr];
794 $p += 2;
795 }
796 if ($p >= 3) {
797 $c1 = array_shift($temp_cw);
798 $c2 = array_shift($temp_cw);
799 $c3 = array_shift($temp_cw);
800 $p -= 3;
801 $tmp = ((1600 * $c1) + (40 * $c2) + $c3 + 1);
802 $cw[] = ($tmp >> 8);
803 $cw[] = ($tmp % 256);
804 $cw_num += 2;
805 $pos = $epos;
806 // 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.
807 $newenc = $this->lookAheadTest($data, $pos, $enc);
808 if ($newenc != $enc) {
809 // switch to new encoding
810 $enc = $newenc;
811 if ($enc != ENC_ASCII) {
812 // set unlatch character
813 $cw[] = $this->getSwitchEncodingCodeword(ENC_ASCII);
814 ++$cw_num;
815 }
816 $cw[] = $this->getSwitchEncodingCodeword($enc);
817 ++$cw_num;
818 $pos -= $p;
819 $p = 0;
820 break;
821 }
822 }
823 } while (($p > 0) AND ($epos < $data_length));
824 // process last data (if any)
825 if ($p > 0) {
826 // get remaining number of data symbols
827 $cwr = ($this->getMaxDataCodewords($cw_num) - $cw_num);
828 if (($cwr == 1) AND ($p == 1)) {
829 // d. If one symbol character remains and one C40 value (data character) remains to be encoded
830 $c1 = array_shift($temp_cw);
831 --$p;
832 $cw[] = ($chr + 1);
833 ++$cw_num;
834 $pos = $epos;
835 $enc = ENC_ASCII;
836 $this->last_enc = $enc;
837 } elseif (($cwr == 2) AND ($p == 1)) {
838 // c. If two symbol characters remain and only one C40 value (data character) remains to be encoded
839 $c1 = array_shift($temp_cw);
840 --$p;
841 $cw[] = 254;
842 $cw[] = ($chr + 1);
843 $cw_num += 2;
844 $pos = $epos;
845 $enc = ENC_ASCII;
846 $this->last_enc = $enc;
847 } elseif (($cwr == 2) AND ($p == 2)) {
848 // b. If two symbol characters remain and two C40 values remain to be encoded
849 $c1 = array_shift($temp_cw);
850 $c2 = array_shift($temp_cw);
851 $p -= 2;
852 $tmp = ((1600 * $c1) + (40 * $c2) + 1);
853 $cw[] = ($tmp >> 8);
854 $cw[] = ($tmp % 256);
855 $cw_num += 2;
856 $pos = $epos;
857 $enc = ENC_ASCII;
858 $this->last_enc = $enc;
859 } else {
860 // switch to ASCII encoding
861 if ($enc != ENC_ASCII) {
862 $enc = ENC_ASCII;
863 $this->last_enc = $enc;
864 $cw[] = $this->getSwitchEncodingCodeword($enc);
865 ++$cw_num;
866 $pos = ($epos - $p);
867 }
868 }
869 }
870 break;
871 }
872 case ENC_EDF: { // F. While in EDIFACT (EDF) encodation
873 // initialize temporary array with 0 length
874 $temp_cw = array();
875 $epos = $pos;
876 $field_length = 0;
877 $newenc = $enc;
878 do {
879 // 2. process the next character in EDIFACT encodation.
880 $chr = ord($data[$epos]);
881 if ($this->isCharMode($chr, ENC_EDF)) {
882 ++$epos;
883 $temp_cw[] = $chr;
884 ++$field_length;
885 }
886 if (($field_length == 4) OR ($epos == $data_length) OR !$this->isCharMode($chr, ENC_EDF)) {
887 if (($epos == $data_length) AND ($field_length < 3)) {
888 $enc = ENC_ASCII;
889 $cw[] = $this->getSwitchEncodingCodeword($enc);
890 ++$cw_num;
891 break;
892 }
893 if ($field_length < 4) {
894 // set unlatch character
895 $temp_cw[] = 0x1f;
896 ++$field_length;
897 // fill empty characters
898 for ($i = $field_length; $i < 4; ++$i) {
899 $temp_cw[] = 0;
900 }
901 $enc = ENC_ASCII;
902 $this->last_enc = $enc;
903 }
904 // encodes four data characters in three codewords
905 $tcw = (($temp_cw[0] & 0x3F) << 2) + (($temp_cw[1] & 0x30) >> 4);
906 if ($tcw > 0) {
907 $cw[] = $tcw;
908 $cw_num++;
909 }
910 $tcw= (($temp_cw[1] & 0x0F) << 4) + (($temp_cw[2] & 0x3C) >> 2);
911 if ($tcw > 0) {
912 $cw[] = $tcw;
913 $cw_num++;
914 }
915 $tcw = (($temp_cw[2] & 0x03) << 6) + ($temp_cw[3] & 0x3F);
916 if ($tcw > 0) {
917 $cw[] = $tcw;
918 $cw_num++;
919 }
920 $temp_cw = array();
921 $pos = $epos;
922 $field_length = 0;
923 if ($enc == ENC_ASCII) {
924 break; // exit from EDIFACT mode
925 }
926 }
927 } while ($epos < $data_length);
928 break;
929 }
930 case ENC_BASE256: { // G. While in Base 256 (B256) encodation
931 // initialize temporary array with 0 length
932 $temp_cw = array();
933 $field_length = 0;
934 while (($pos < $data_length) AND ($field_length <= 1555)) {
935 $newenc = $this->lookAheadTest($data, $pos, $enc);
936 if ($newenc != $enc) {
937 // 1. If the look-ahead test (starting at step J) indicates another mode, switch to that mode.
938 $enc = $newenc;
939 break; // exit from B256 mode
940 } else {
941 // 2. Otherwise, process the next character in Base 256 encodation.
942 $chr = ord($data[$pos]);
943 ++$pos;
944 $temp_cw[] = $chr;
945 ++$field_length;
946 }
947 }
948 // set field length
949 if ($field_length <= 249) {
950 $cw[] = $this->get255StateCodeword($field_length, ($cw_num + 1));
951 ++$cw_num;
952 } else {
953 $cw[] = $this->get255StateCodeword((floor($field_length / 250) + 249), ($cw_num + 1));
954 $cw[] = $this->get255StateCodeword(($field_length % 250), ($cw_num + 2));
955 $cw_num += 2;
956 }
957 if (!empty($temp_cw)) {
958 // add B256 field
959 foreach ($temp_cw as $p => $cht) {
960 $cw[] = $this->get255StateCodeword($cht, ($cw_num + $p + 1));
961 }
962 }
963 break;
964 }
965 } // end of switch enc
966 } // end of while
967 return $cw;
968 }
Datamatrix\getMaxDataCodewords
getMaxDataCodewords($numcw)
Choose the minimum matrix size and return the max number of data codewords.
Definition: datamatrix.php:692
Datamatrix\lookAheadTest
lookAheadTest($data, $pos, $mode)
The look-ahead test scans the data to be encoded to find the best mode (Annex P - steps from J to S).
Definition: datamatrix.php:523
Datamatrix\getSwitchEncodingCodeword
getSwitchEncodingCodeword($mode)
Get the switching codeword to a new encoding mode (latch codeword)
Definition: datamatrix.php:653
Datamatrix\get255StateCodeword
get255StateCodeword($cwpad, $cwpos)
Return the 255-state codeword.
Definition: datamatrix.php:461
Datamatrix\isCharMode
isCharMode($chr, $mode)
Returns true if the char belongs to the selected mode.
Definition: datamatrix.php:476
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
$data
$data
Definition: example_011.php:126

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 692 of file datamatrix.php.

692 {
693 foreach ($this->symbattr as $key => $matrix) {
694 if ($matrix[11] >= $numcw) {
695 return $matrix[11];
696 }
697 }
698 return 0;
699 }

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 1116 of file datamatrix.php.

1116 {
1117 // initialize array with zeros
1118 $marr = array_fill(0, ($nrow * $ncol), 0);
1119 // set starting values
1120 $chr = 1;
1121 $row = 4;
1122 $col = 0;
1123 do {
1124 // repeatedly first check for one of the special corner cases, then
1125 if (($row == $nrow) AND ($col == 0)) {
1126 $marr = $this->placeCornerA($marr, $nrow, $ncol, $chr);
1127 ++$chr;
1128 }
1129 if (($row == ($nrow - 2)) AND ($col == 0) AND ($ncol % 4)) {
1130 $marr = $this->placeCornerB($marr, $nrow, $ncol, $chr);
1131 ++$chr;
1132 }
1133 if (($row == ($nrow - 2)) AND ($col == 0) AND (($ncol % 8) == 4)) {
1134 $marr = $this->placeCornerC($marr, $nrow, $ncol, $chr);
1135 ++$chr;
1136 }
1137 if (($row == ($nrow + 4)) AND ($col == 2) AND (!($ncol % 8))) {
1138 $marr = $this->placeCornerD($marr, $nrow, $ncol, $chr);
1139 ++$chr;
1140 }
1141 // sweep upward diagonally, inserting successive characters,
1142 do {
1143 if (($row < $nrow) AND ($col >= 0) AND (!$marr[(($row * $ncol) + $col)])) {
1144 $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr);
1145 ++$chr;
1146 }
1147 $row -= 2;
1148 $col += 2;
1149 } while (($row >= 0) AND ($col < $ncol));
1150 ++$row;
1151 $col += 3;
1152 // & then sweep downward diagonally, inserting successive characters,...
1153 do {
1154 if (($row >= 0) AND ($col < $ncol) AND (!$marr[(($row * $ncol) + $col)])) {
1155 $marr = $this->placeUtah($marr, $nrow, $ncol, $row, $col, $chr);
1156 ++$chr;
1157 }
1158 $row += 2;
1159 $col -= 2;
1160 } while (($row < $nrow) AND ($col >= 0));
1161 $row += 3;
1162 ++$col;
1163 // ... until the entire array is scanned
1164 } while (($row < $nrow) OR ($col < $ncol));
1165 // lastly, if the lower righthand corner is untouched, fill in fixed pattern
1166 if (!$marr[(($nrow * $ncol) - 1)]) {
1167 $marr[(($nrow * $ncol) - 1)] = 1;
1168 $marr[(($nrow * $ncol) - $ncol - 2)] = 1;
1169 }
1170 return $marr;
1171 }
Datamatrix\placeCornerD
placeCornerD($marr, $nrow, $ncol, $chr)
Places the 8 bits of the fourth special corner case.
Definition: datamatrix.php:1096
Datamatrix\placeUtah
placeUtah($marr, $nrow, $ncol, $row, $col, $chr)
Places the 8 bits of a utah-shaped symbol character.
Definition: datamatrix.php:1008
Datamatrix\placeCornerA
placeCornerA($marr, $nrow, $ncol, $chr)
Places the 8 bits of the first special corner case.
Definition: datamatrix.php:1030
Datamatrix\placeCornerC
placeCornerC($marr, $nrow, $ncol, $chr)
Places the 8 bits of the third special corner case.
Definition: datamatrix.php:1074
Datamatrix\placeCornerB
placeCornerB($marr, $nrow, $ncol, $chr)
Places the 8 bits of the second special corner case.
Definition: datamatrix.php:1052

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 653 of file datamatrix.php.

653 {
654 switch ($mode) {
655 case ENC_ASCII: { // ASCII character 0 to 127
656 $cw = 254;
657 if ($this->last_enc == ENC_EDF) {
658 $cw = 124;
659 }
660 break;
661 }
662 case ENC_C40: { // Upper-case alphanumeric
663 $cw = 230;
664 break;
665 }
666 case ENC_TXT: { // Lower-case alphanumeric
667 $cw = 239;
668 break;
669 }
670 case ENC_X12: { // ANSI X12
671 $cw = 238;
672 break;
673 }
674 case ENC_EDF: { // ASCII character 32 to 94
675 $cw = 240;
676 break;
677 }
678 case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page)
679 $cw = 231;
680 break;
681 }
682 }
683 return $cw;
684 }

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 476 of file datamatrix.php.

476 {
477 $status = false;
478 switch ($mode) {
479 case ENC_ASCII: { // ASCII character 0 to 127
480 $status = (($chr >= 0) AND ($chr <= 127));
481 break;
482 }
483 case ENC_C40: { // Upper-case alphanumeric
484 $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 65) AND ($chr <= 90)));
485 break;
486 }
487 case ENC_TXT: { // Lower-case alphanumeric
488 $status = (($chr == 32) OR (($chr >= 48) AND ($chr <= 57)) OR (($chr >= 97) AND ($chr <= 122)));
489 break;
490 }
491 case ENC_X12: { // ANSI X12
492 $status = (($chr == 13) OR ($chr == 42) OR ($chr == 62));
493 break;
494 }
495 case ENC_EDF: { // ASCII character 32 to 94
496 $status = (($chr >= 32) AND ($chr <= 94));
497 break;
498 }
499 case ENC_BASE256: { // Function character (FNC1, Structured Append, Reader Program, or Code Page)
500 $status = (($chr == 232) OR ($chr == 233) OR ($chr == 234) OR ($chr == 241));
501 break;
502 }
503 case ENC_ASCII_EXT: { // ASCII character 128 to 255
504 $status = (($chr >= 128) AND ($chr <= 255));
505 break;
506 }
507 case ENC_ASCII_NUM: { // ASCII digits
508 $status = (($chr >= 48) AND ($chr <= 57));
509 break;
510 }
511 }
512 return $status;
513 }

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 523 of file datamatrix.php.

523 {
524 $data_length = strlen($data);
525 if ($pos >= $data_length) {
526 return $mode;
527 }
528 $charscount = 0; // count processed chars
529 // STEP J
530 if ($mode == ENC_ASCII) {
531 $numch = array(0, 1, 1, 1, 1, 1.25);
532 } else {
533 $numch = array(1, 2, 2, 2, 2, 2.25);
534 $numch[$mode] = 0;
535 }
536 while (true) {
537 // STEP K
538 if (($pos + $charscount) == $data_length) {
539 if ($numch[ENC_ASCII] <= ceil(min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
540 return ENC_ASCII;
541 }
542 if ($numch[ENC_BASE256] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) {
543 return ENC_BASE256;
544 }
545 if ($numch[ENC_EDF] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256]))) {
546 return ENC_EDF;
547 }
548 if ($numch[ENC_TXT] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
549 return ENC_TXT;
550 }
551 if ($numch[ENC_X12] < ceil(min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256]))) {
552 return ENC_X12;
553 }
554 return ENC_C40;
555 }
556 // get char
557 $chr = ord($data[$pos + $charscount]);
558 $charscount++;
559 // STEP L
560 if ($this->isCharMode($chr, ENC_ASCII_NUM)) {
561 $numch[ENC_ASCII] += (1 / 2);
562 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
563 $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]);
564 $numch[ENC_ASCII] += 2;
565 } else {
566 $numch[ENC_ASCII] = ceil($numch[ENC_ASCII]);
567 $numch[ENC_ASCII] += 1;
568 }
569 // STEP M
570 if ($this->isCharMode($chr, ENC_C40)) {
571 $numch[ENC_C40] += (2 / 3);
572 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
573 $numch[ENC_C40] += (8 / 3);
574 } else {
575 $numch[ENC_C40] += (4 / 3);
576 }
577 // STEP N
578 if ($this->isCharMode($chr, ENC_TXT)) {
579 $numch[ENC_TXT] += (2 / 3);
580 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
581 $numch[ENC_TXT] += (8 / 3);
582 } else {
583 $numch[ENC_TXT] += (4 / 3);
584 }
585 // STEP O
586 if ($this->isCharMode($chr, ENC_X12) OR $this->isCharMode($chr, ENC_C40)) {
587 $numch[ENC_X12] += (2 / 3);
588 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
589 $numch[ENC_X12] += (13 / 3);
590 } else {
591 $numch[ENC_X12] += (10 / 3);
592 }
593 // STEP P
594 if ($this->isCharMode($chr, ENC_EDF)) {
595 $numch[ENC_EDF] += (3 / 4);
596 } elseif ($this->isCharMode($chr, ENC_ASCII_EXT)) {
597 $numch[ENC_EDF] += (17 / 4);
598 } else {
599 $numch[ENC_EDF] += (13 / 4);
600 }
601 // STEP Q
602 if ($this->isCharMode($chr, ENC_BASE256)) {
603 $numch[ENC_BASE256] += 4;
604 } else {
605 $numch[ENC_BASE256] += 1;
606 }
607 // STEP R
608 if ($charscount >= 4) {
609 if (($numch[ENC_ASCII] + 1) <= min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) {
610 return ENC_ASCII;
611 }
612 if ((($numch[ENC_BASE256] + 1) <= $numch[ENC_ASCII])
613 OR (($numch[ENC_BASE256] + 1) < min($numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_EDF]))) {
614 return ENC_BASE256;
615 }
616 if (($numch[ENC_EDF] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_X12], $numch[ENC_BASE256])) {
617 return ENC_EDF;
618 }
619 if (($numch[ENC_TXT] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_X12], $numch[ENC_EDF], $numch[ENC_BASE256])) {
620 return ENC_TXT;
621 }
622 if (($numch[ENC_X12] + 1) < min($numch[ENC_ASCII], $numch[ENC_C40], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) {
623 return ENC_X12;
624 }
625 if (($numch[ENC_C40] + 1) < min($numch[ENC_ASCII], $numch[ENC_TXT], $numch[ENC_EDF], $numch[ENC_BASE256])) {
626 if ($numch[ENC_C40] < $numch[ENC_X12]) {
627 return ENC_C40;
628 }
629 if ($numch[ENC_C40] == $numch[ENC_X12]) {
630 $k = ($pos + $charscount + 1);
631 while ($k < $data_length) {
632 $tmpchr = ord($data{$k});
633 if ($this->isCharMode($tmpchr, ENC_X12)) {
634 return ENC_X12;
635 } elseif (!($this->isCharMode($tmpchr, ENC_X12) OR $this->isCharMode($tmpchr, ENC_C40))) {
636 break;
637 }
638 ++$k;
639 }
640 return ENC_C40;
641 }
642 }
643 }
644 } // end of while
645 }

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 1030 of file datamatrix.php.

1030 {
1031 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1);
1032 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 1, $chr, 2);
1033 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 2, $chr, 3);
1034 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4);
1035 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5);
1036 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6);
1037 $marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7);
1038 $marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8);
1039 return $marr;
1040 }
Datamatrix\placeModule
placeModule($marr, $nrow, $ncol, $row, $col, $chr, $bit)
Places "chr+bit" with appropriate wrapping within array[].
Definition: datamatrix.php:983

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 1052 of file datamatrix.php.

1052 {
1053 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1);
1054 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2);
1055 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3);
1056 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-4, $chr, 4);
1057 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 5);
1058 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 6);
1059 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 7);
1060 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8);
1061 return $marr;
1062 }

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 1074 of file datamatrix.php.

1074 {
1075 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-3, 0, $chr, 1);
1076 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-2, 0, $chr, 2);
1077 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 3);
1078 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4);
1079 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5);
1080 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 6);
1081 $marr = $this->placeModule($marr, $nrow, $ncol, 2, $ncol-1, $chr, 7);
1082 $marr = $this->placeModule($marr, $nrow, $ncol, 3, $ncol-1, $chr, 8);
1083 return $marr;
1084 }

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 1096 of file datamatrix.php.

1096 {
1097 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, 0, $chr, 1);
1098 $marr = $this->placeModule($marr, $nrow, $ncol, $nrow-1, $ncol-1, $chr, 2);
1099 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-3, $chr, 3);
1100 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-2, $chr, 4);
1101 $marr = $this->placeModule($marr, $nrow, $ncol, 0, $ncol-1, $chr, 5);
1102 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-3, $chr, 6);
1103 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-2, $chr, 7);
1104 $marr = $this->placeModule($marr, $nrow, $ncol, 1, $ncol-1, $chr, 8);
1105 return $marr;
1106 }

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 983 of file datamatrix.php.

983 {
984 if ($row < 0) {
985 $row += $nrow;
986 $col += (4 - (($nrow + 4) % 8));
987 }
988 if ($col < 0) {
989 $col += $ncol;
990 $row += (4 - (($ncol + 4) % 8));
991 }
992 $marr[(($row * $ncol) + $col)] = ((10 * $chr) + $bit);
993 return $marr;
994 }

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 1008 of file datamatrix.php.

1008 {
1009 $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-2, $chr, 1);
1010 $marr = $this->placeModule($marr, $nrow, $ncol, $row-2, $col-1, $chr, 2);
1011 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-2, $chr, 3);
1012 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col-1, $chr, 4);
1013 $marr = $this->placeModule($marr, $nrow, $ncol, $row-1, $col, $chr, 5);
1014 $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-2, $chr, 6);
1015 $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col-1, $chr, 7);
1016 $marr = $this->placeModule($marr, $nrow, $ncol, $row, $col, $chr, 8);
1017 return $marr;
1018 }

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: