BCGcode39.barcode.php
5.73 KB
1
2
3
4
5
6
7
8
9
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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
<?php
/**
*--------------------------------------------------------------------
*
* Sub-Class - Code 39
*
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGParseException.php');
include_once('BCGBarcode1D.php');
class BCGcode39 extends BCGBarcode1D {
protected $starting, $ending;
protected $checksum;
/**
* Constructor.
*/
public function __construct() {
parent::__construct();
$this->starting = $this->ending = 43;
$this->keys = array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '-', '.', ' ', '$', '/', '+', '%', '*');
$this->code = array( // 0 added to add an extra space
'0001101000', /* 0 */
'1001000010', /* 1 */
'0011000010', /* 2 */
'1011000000', /* 3 */
'0001100010', /* 4 */
'1001100000', /* 5 */
'0011100000', /* 6 */
'0001001010', /* 7 */
'1001001000', /* 8 */
'0011001000', /* 9 */
'1000010010', /* A */
'0010010010', /* B */
'1010010000', /* C */
'0000110010', /* D */
'1000110000', /* E */
'0010110000', /* F */
'0000011010', /* G */
'1000011000', /* H */
'0010011000', /* I */
'0000111000', /* J */
'1000000110', /* K */
'0010000110', /* L */
'1010000100', /* M */
'0000100110', /* N */
'1000100100', /* O */
'0010100100', /* P */
'0000001110', /* Q */
'1000001100', /* R */
'0010001100', /* S */
'0000101100', /* T */
'1100000010', /* U */
'0110000010', /* V */
'1110000000', /* W */
'0100100010', /* X */
'1100100000', /* Y */
'0110100000', /* Z */
'0100001010', /* - */
'1100001000', /* . */
'0110001000', /* */
'0101010000', /* $ */
'0101000100', /* / */
'0100010100', /* + */
'0001010100', /* % */
'0100101000' /* * */
);
$this->setChecksum(false);
}
/**
* Sets if we display the checksum.
*
* @param bool $checksum
*/
public function setChecksum($checksum) {
$this->checksum = (bool)$checksum;
}
/**
* Parses the text before displaying it.
*
* @param mixed $text
*/
public function parse($text) {
parent::parse(strtoupper($text)); // Only Capital Letters are Allowed
}
/**
* Draws the barcode.
*
* @param resource $im
*/
public function draw($im) {
// Starting *
$this->drawChar($im, $this->code[$this->starting], true);
// Chars
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
$this->drawChar($im, $this->findCode($this->text[$i]), true);
}
// Checksum (rarely used)
if ($this->checksum === true) {
$this->calculateChecksum();
$this->drawChar($im, $this->code[$this->checksumValue % 43], true);
}
// Ending *
$this->drawChar($im, $this->code[$this->ending], true);
$this->drawText($im, 0, 0, $this->positionX, $this->thickness);
}
/**
* Returns the maximal size of a barcode.
*
* @param int $w
* @param int $h
* @return int[]
*/
public function getDimension($w, $h) {
$textlength = 13 * strlen($this->text);
$startlength = 13;
$checksumlength = 0;
if ($this->checksum === true) {
$checksumlength = 13;
}
$endlength = 13;
$w += $startlength + $textlength + $checksumlength + $endlength;
$h += $this->thickness;
return parent::getDimension($w, $h);
}
/**
* Validates the input.
*/
protected function validate() {
$c = strlen($this->text);
if ($c === 0) {
throw new BCGParseException('code39', 'No data has been entered.');
}
// Checking if all chars are allowed
for ($i = 0; $i < $c; $i++) {
if (array_search($this->text[$i], $this->keys) === false) {
throw new BCGParseException('code39', 'The character \'' . $this->text[$i] . '\' is not allowed.');
}
}
if (strpos($this->text, '*') !== false) {
throw new BCGParseException('code39', 'The character \'*\' is not allowed.');
}
parent::validate();
}
/**
* Overloaded method to calculate checksum.
*/
protected function calculateChecksum() {
$this->checksumValue = 0;
$c = strlen($this->text);
for ($i = 0; $i < $c; $i++) {
$this->checksumValue += $this->findIndex($this->text[$i]);
}
$this->checksumValue = $this->checksumValue % 43;
}
/**
* Overloaded method to display the checksum.
*/
protected function processChecksum() {
if ($this->checksumValue === false) { // Calculate the checksum only once
$this->calculateChecksum();
}
if ($this->checksumValue !== false) {
return $this->keys[$this->checksumValue];
}
return false;
}
}
?>