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<?php
/**
* BCGBarcode1D.php
*--------------------------------------------------------------------
*
* Holds all type of barcodes for 1D generation
*
*--------------------------------------------------------------------
* Revision History
* v2.0.0 23 apr 2008 Jean-Sébastien Goupil New Version Update
*--------------------------------------------------------------------
* $Id: BCGBarcode1D.php,v 1.3 2009/11/09 04:08:41 jsgoupil Exp $
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGBarcode.php');
include_once('BCGFont.php');
abstract class BCGBarcode1D extends BCGBarcode {
const SIZE_SPACING_FONT = 5;
const AUTO_LABEL = '##!!AUTO_LABEL!!##';
protected $thickness;
protected $keys, $code;
protected $positionX;
protected $textfont;
protected $text, $label;
protected $checksumValue;
protected $displayChecksum;
protected function __construct() {
parent::__construct();
$this->setThickness(30);
$this->text = '';
$this->checksumValue = false;
$this->setLabel(self::AUTO_LABEL);
$this->setFont(5);
}
public function setThickness($thickness) {
$this->thickness = $thickness;
}
public function getThickness() {
return $this->thickness;
}
public function parse($text) {
$this->text = $text;
$this->checksumValue = false; // Reset checksumValue
}
public function setLabel($label) {
$this->label = $label;
}
public function getLabel() {
$label = $this->label;
if($this->label === self::AUTO_LABEL) {
$label = $this->text;
if($this->displayChecksum === true && ($checksum = $this->processChecksum()) !== false) {
$label .= $checksum;
}
}
return $label;
}
/**
* Saves the font.
*
* @param mixed $font BCGFont or int
*/
public function setFont($font) {
if($font instanceof BCGFont) {
$this->textfont = clone $font;
$this->textfont->setText($this->text);
} else {
$this->textfont = min(5, max(0, intval($font)));
}
}
public function getMaxSize() {
$p = parent::getMaxSize();
$label = $this->getLabel();
$textHeight = 0;
if(!empty($label)) {
if($this->textfont instanceof BCGFont) {
$textfont = clone $this->textfont;
$textfont->setText($label);
$textHeight = $textfont->getHeight() + self::SIZE_SPACING_FONT;
} elseif($this->textfont !== 0) {
$textHeight = imagefontheight($this->textfont) + self::SIZE_SPACING_FONT;
}
}
return array($p[0], $p[1] + $this->thickness * $this->scale + $textHeight);
}
/**
* Gets the checksum of a Barcode.
* If no checksum is available, return FALSE.
*
* @return string
*/
public function getChecksum() {
return $this->processChecksum();
}
/**
* Sets if the checksum is displayed with the label or not.
* The checksum must be activated in some case to make this variable effective.
*
* @param boolean $display
*/
public function setDisplayChecksum($display) {
$this->displayChecksum = (bool)$display;
}
/**
* Returns the index in $keys (useful for checksum)
*
* @param mixed $var
* @return mixed
*/
protected function findIndex($var) {
return array_search($var, $this->keys);
}
/**
* Returns the code of the char (useful for drawing bars)
*
* @param mixed $var
* @return string
*/
protected function findCode($var) {
return $this->code[$this->findIndex($var)];
}
/**
* Draws all chars thanks to $code. if $start is true, the line begins by a space.
* if $start is false, the line begins by a bar.
*
* @param resource $im
* @param string $code
* @param boolean $start
*/
protected function drawChar($im, $code, $startBar = true) {
$colors = array(self::COLOR_FG, self::COLOR_BG);
$currentColor = $startBar ? 0 : 1;
$c = strlen($code);
for($i = 0; $i < $c; $i++) {
for($j = 0; $j < intval($code[$i]) + 1; $j++) {
$this->drawSingleBar($im, $colors[$currentColor]);
$this->nextX();
}
$currentColor = ($currentColor + 1) % 2;
}
}
/**
* Draws a Bar of $color depending of the resolution
*
* @param resource $img
* @param FColor $color
*/
protected function drawSingleBar($im, $color) {
$this->drawFilledRectangle($im, $this->positionX, 0, $this->positionX, $this->thickness - 1, $color);
}
/**
* Moving the pointer right to write a bar
*/
protected function nextX() {
$this->positionX++;
}
/**
* Draws the label under the barcode
*
* @param resource $im
*/
protected function drawText($im) {
$label = $this->getLabel();
if(!empty($label)) {
$pA = $this->getMaxSize();
$pB = BCGBarcode1D::getMaxSize();
$w = $pA[0] - $pB[0];
if($this->textfont instanceof BCGFont) {
$textfont = clone $this->textfont;
$textfont->setText($label);
$xPosition = ($w / 2) - ($textfont->getWidth() / 2) + $this->offsetX * $this->scale;
$yPosition = $this->thickness * $this->scale + $textfont->getHeight() - $textfont->getUnderBaseline() + self::SIZE_SPACING_FONT + $this->offsetY * $this->scale;
$textfont->draw($im, $this->colorFg->allocate($im), $xPosition, $yPosition);
} elseif($this->textfont !== 0) {
$xPosition = ($w / 2) - (strlen($label) / 2) * imagefontwidth($this->textfont) + $this->offsetX * $this->scale;
$yPosition = $this->thickness * $this->scale + self::SIZE_SPACING_FONT + $this->offsetY * $this->scale;
imagestring($im, $this->textfont, $xPosition, $yPosition, $label, $this->colorFg->allocate($im));
}
}
}
/**
* Method that saves FALSE into the checksumValue. This means no checksum
* but this method should be overloaded when needed.
*/
protected function calculateChecksum() {
$this->checksumValue = false;
}
/**
* Returns FALSE because there is no checksum. This method should be
* overloaded to return correctly the checksum in string with checksumValue.
*
* @return string
*/
protected function processChecksum() {
return false;
}
}
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