Added Code39 method that generates barcodes.

rudissaar · Jan 16, 2018 · 0cabca3 · 0cabca3
1 parent 428f36d
commit 0cabca3
Showing 1 changed file with 94 additions and 0 deletions.
diff --git a/FPDFPlus.php b/FPDFPlus.php
@@ -116,4 +116,98 @@ public function GetLeftMargin()
     {
         return (float) $this->lMargin;
     }
+
+    /**
+     * This method implements Code 39 barcodes.
+     * A Code 39 barcode can encode a string with the following characters: digits (0 to 9),
+     * uppercase letters (A to Z) and 8 additional characters (- . space $ / + % *).
+     *
+     * Source: http://www.fpdf.org/en/script/script46.php
+     *
+     * @param float $xpos
+     * @param float $ypos
+     * @param string $code
+     * @param float $baseline
+     * @param float $height
+     */
+    public function Code39($xpos, $ypos, $code, $baseline = 0.5, $height = 5)
+    {
+        $wide = $baseline;
+        $narrow = $baseline / 3 ;
+        $gap = $narrow;
+
+        $barChar['0'] = 'nnnwwnwnn';
+        $barChar['1'] = 'wnnwnnnnw';
+        $barChar['2'] = 'nnwwnnnnw';
+        $barChar['3'] = 'wnwwnnnnn';
+        $barChar['4'] = 'nnnwwnnnw';
+        $barChar['5'] = 'wnnwwnnnn';
+        $barChar['6'] = 'nnwwwnnnn';
+        $barChar['7'] = 'nnnwnnwnw';
+        $barChar['8'] = 'wnnwnnwnn';
+        $barChar['9'] = 'nnwwnnwnn';
+        $barChar['A'] = 'wnnnnwnnw';
+        $barChar['B'] = 'nnwnnwnnw';
+        $barChar['C'] = 'wnwnnwnnn';
+        $barChar['D'] = 'nnnnwwnnw';
+        $barChar['E'] = 'wnnnwwnnn';
+        $barChar['F'] = 'nnwnwwnnn';
+        $barChar['G'] = 'nnnnnwwnw';
+        $barChar['H'] = 'wnnnnwwnn';
+        $barChar['I'] = 'nnwnnwwnn';
+        $barChar['J'] = 'nnnnwwwnn';
+        $barChar['K'] = 'wnnnnnnww';
+        $barChar['L'] = 'nnwnnnnww';
+        $barChar['M'] = 'wnwnnnnwn';
+        $barChar['N'] = 'nnnnwnnww';
+        $barChar['O'] = 'wnnnwnnwn';
+        $barChar['P'] = 'nnwnwnnwn';
+        $barChar['Q'] = 'nnnnnnwww';
+        $barChar['R'] = 'wnnnnnwwn';
+        $barChar['S'] = 'nnwnnnwwn';
+        $barChar['T'] = 'nnnnwnwwn';
+        $barChar['U'] = 'wwnnnnnnw';
+        $barChar['V'] = 'nwwnnnnnw';
+        $barChar['W'] = 'wwwnnnnnn';
+        $barChar['X'] = 'nwnnwnnnw';
+        $barChar['Y'] = 'wwnnwnnnn';
+        $barChar['Z'] = 'nwwnwnnnn';
+        $barChar['-'] = 'nwnnnnwnw';
+        $barChar['.'] = 'wwnnnnwnn';
+        $barChar[' '] = 'nwwnnnwnn';
+        $barChar['*'] = 'nwnnwnwnn';
+        $barChar['$'] = 'nwnwnwnnn';
+        $barChar['/'] = 'nwnwnnnwn';
+        $barChar['+'] = 'nwnnnwnwn';
+        $barChar['%'] = 'nnnwnwnwn';
+
+        $this->SetFillColor(0);
+        $code = '*' . strtoupper($code) . '*';
+
+        for ($i = 0; $i < strlen($code); $i++) {
+            $char = $code[$i];
+
+            if (!isset($barChar[$char])) {
+                $this->Error('Invalid character in barcode: ' . $char);
+            }
+
+            $seq = $barChar[$char];
+
+            for ($bar = 0; $bar < 9; $bar++) {
+                if ($seq[$bar] === 'n') {
+                    $lineWidth = $narrow;
+                } else {
+                    $lineWidth = $wide;
+                }
+
+                if ($bar % 2 === 0) {
+                    $this->Rect($xpos, $ypos, $lineWidth, $height, 'F');
+                }
+
+                $xpos += $lineWidth;
+            }
+
+            $xpos += $gap;
+        }
+    }
 }