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extend/barcode/class/BCGupca.barcode.php

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+<?php
+/**
+ *--------------------------------------------------------------------
+ *
+ * Sub-Class - UPC-A
+ *
+ * UPC-A contains
+ *    - 2 system digits (1 not provided, a 0 is added automatically)
+ *    - 5 manufacturer code digits
+ *    - 5 product digits
+ *    - 1 checksum digit
+ *
+ * The checksum is always displayed.
+ *
+ *--------------------------------------------------------------------
+ * Copyright (C) Jean-Sebastien Goupil
+ * http://www.barcodephp.com
+ */
+include_once('BCGParseException.php');
+include_once('BCGBarcode.php');
+include_once('BCGean13.barcode.php');
+include_once('BCGLabel.php');
+
+class BCGupca extends BCGean13 {
+    protected $labelRight = null;
+
+    /**
+     * Constructor.
+     */
+    public function __construct() {
+        parent::__construct();
+    }
+
+    /**
+     * Draws the barcode.
+     *
+     * @param resource $im
+     */
+    public function draw($im) {
+        // The following code is exactly the same as EAN13. We just add a 0 in front of the code !
+        $this->text = '0' . $this->text; // We will remove it at the end... don't worry
+
+        parent::draw($im);
+
+        // We remove the 0 in front, as we said :)
+        $this->text = substr($this->text, 1);
+    }
+
+    /**
+     * Draws the extended bars on the image.
+     *
+     * @param resource $im
+     * @param int $plus
+     */
+    protected function drawExtendedBars($im, $plus) {
+        $temp_text = $this->text . $this->keys[$this->checksumValue];
+        $rememberX = $this->positionX;
+        $rememberH = $this->thickness;
+
+        // We increase the bars
+        // First 2 Bars
+        $this->thickness = $this->thickness + intval($plus / $this->scale);
+        $this->positionX = 0;
+        $this->drawSingleBar($im, BCGBarcode::COLOR_FG);
+        $this->positionX += 2;
+        $this->drawSingleBar($im, BCGBarcode::COLOR_FG);
+
+        // Attemping to increase the 2 following bars
+        $this->positionX += 1;
+        $temp_value = $this->findCode($temp_text[1]);
+        $this->drawChar($im, $temp_value, false);
+
+        // Center Guard Bar
+        $this->positionX += 36;
+        $this->drawSingleBar($im, BCGBarcode::COLOR_FG);
+        $this->positionX += 2;
+        $this->drawSingleBar($im, BCGBarcode::COLOR_FG);
+
+        // Attemping to increase the 2 last bars
+        $this->positionX += 37;
+        $temp_value = $this->findCode($temp_text[12]);
+        $this->drawChar($im, $temp_value, true);
+
+        // Completly last bars
+        $this->drawSingleBar($im, BCGBarcode::COLOR_FG);
+        $this->positionX += 2;
+        $this->drawSingleBar($im, BCGBarcode::COLOR_FG);
+
+        $this->positionX = $rememberX;
+        $this->thickness = $rememberH;
+    }
+
+    /**
+     * Adds the default label.
+     */
+    protected function addDefaultLabel() {
+        if ($this->isDefaultEanLabelEnabled()) {
+            $this->processChecksum();
+            $label = $this->getLabel();
+            $font = $this->font;
+
+            $this->labelLeft = new BCGLabel(substr($label, 0, 1), $font, BCGLabel::POSITION_LEFT, BCGLabel::ALIGN_BOTTOM);
+            $this->labelLeft->setSpacing(4 * $this->scale);
+
+            $this->labelCenter1 = new BCGLabel(substr($label, 1, 5), $font, BCGLabel::POSITION_BOTTOM, BCGLabel::ALIGN_LEFT);
+            $labelCenter1Dimension = $this->labelCenter1->getDimension();
+            $this->labelCenter1->setOffset(($this->scale * 44 - $labelCenter1Dimension[0]) / 2 + $this->scale * 6);
+
+            $this->labelCenter2 = new BCGLabel(substr($label, 6, 5), $font, BCGLabel::POSITION_BOTTOM, BCGLabel::ALIGN_LEFT);
+            $this->labelCenter2->setOffset(($this->scale * 44 - $labelCenter1Dimension[0]) / 2 + $this->scale * 45);
+
+            $this->labelRight = new BCGLabel($this->keys[$this->checksumValue], $font, BCGLabel::POSITION_RIGHT, BCGLabel::ALIGN_BOTTOM);
+            $this->labelRight->setSpacing(4 * $this->scale);
+
+            if ($this->alignLabel) {
+                $labelDimension = $this->labelCenter1->getDimension();
+                $this->labelLeft->setOffset($labelDimension[1]);
+                $this->labelRight->setOffset($labelDimension[1]);
+            } else {
+                $labelDimension = $this->labelLeft->getDimension();
+                $this->labelLeft->setOffset($labelDimension[1] / 2);
+                $labelDimension = $this->labelLeft->getDimension();
+                $this->labelRight->setOffset($labelDimension[1] / 2);
+            }
+
+            $this->addLabel($this->labelLeft);
+            $this->addLabel($this->labelCenter1);
+            $this->addLabel($this->labelCenter2);
+            $this->addLabel($this->labelRight);
+        }
+    }
+
+    /**
+     * Check correct length.
+     */
+    protected function checkCorrectLength() {
+        // If we have 12 chars, just flush the last one without throwing anything
+        $c = strlen($this->text);
+        if ($c === 12) {
+            $this->text = substr($this->text, 0, 11);
+        } elseif ($c !== 11) {
+            throw new BCGParseException('upca', 'Must contain 11 digits, the 12th digit is automatically added.');
+        }
+    }
+}
+?>