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<?php
/**
* BCGBarcode.php
*--------------------------------------------------------------------
*
* Base class for Barcode 1D and 2D
*
*--------------------------------------------------------------------
* Revision History
* v2.0.0 23 apr 2008 Jean-Sébastien Goupil New Version Update
*--------------------------------------------------------------------
* $Id: BCGBarcode.php,v 1.13 2009/11/09 04:08:41 jsgoupil Exp $
*--------------------------------------------------------------------
* Copyright (C) Jean-Sebastien Goupil
* http://www.barcodephp.com
*/
include_once('BCGColor.php');
abstract class BCGBarcode {
const COLOR_BG = 0;
const COLOR_FG = 1;
protected $error;
protected $colorFg, $colorBg; // Color Foreground, Barckground
protected $scale; // Scale of the graphic, default: 1
protected $offsetX, $offsetY; // Position where to start the drawing
protected function __construct() {
$this->setForegroundColor(0x000000);
$this->setBackgroundColor(0xffffff);
$this->setScale(1);
$this->setOffsetX(0);
$this->setOffsetY(0);
$this->error = 0;
}
/**
* Parses the text before displaying it.
*
* @param mixed $text
*/
public abstract function parse($text);
/**
* Sets the foreground color of the barcode. It could be a BCGColor
* value or simply a language code (white, black, yellow...) or hex value.
*
* @param mixed $code
*/
public function setForegroundColor($code) {
if($code instanceof BCGColor) {
$this->colorFg = $code;
} else {
$this->colorFg = new BCGColor($code);
}
}
/**
* Sets the background color of the barcode. It could be a BCGColor
* value or simply a language code (white, black, yellow...) or hex value.
*
* @param mixed $code
*/
public function setBackgroundColor($code) {
if($code instanceof BCGColor) {
$this->colorBg = $code;
} else {
$this->colorBg = new BCGColor($code);
}
}
/**
* Sets the color
*
* @param mixed $fg
* @param mixed $bg
*/
public function setColor($fg, $bg) {
$this->setForegroundColor($fg);
$this->setBackgroundColor($bg);
}
public function getScale() {
return $this->scale;
}
public function setScale($scale) {
$scale = intval($scale);
if($scale <= 0) {
$scale = 1;
}
$this->scale = $scale;
}
public abstract function draw(&$im);
/**
* Returns the maximal size of a barcode.
* [0]->width
* [1]->height
*
* @return int[]
*/
public function getMaxSize() {
return array($this->offsetX * $this->scale, $this->offsetY * $this->scale);
}
/**
* Sets the X offset
*
* @param int $offsetX
*/
public function setOffsetX($offsetX) {
$offsetX = intval($offsetX);
if($offsetX < 0) {
$offsetX = 0;
}
$this->offsetX = $offsetX;
}
/**
* Sets the Y offset
*
* @param int $offsetY
*/
public function setOffsetY($offsetY) {
$offsetY = intval($offsetY);
if($offsetY < 0) {
$offsetY = 0;
}
$this->offsetY = $offsetY;
}
protected function drawPixel($im, $x, $y, $color = self::COLOR_FG) {
$xR = ($x + $this->offsetX) * $this->scale;
$yR = ($y + $this->offsetY) * $this->scale;
// we always draw a rectangle
imagefilledrectangle($im,
$xR,
$yR,
$xR + $this->scale - 1,
$yR + $this->scale - 1,
$this->getColor($im, $color));
}
protected function drawRectangle($im, $x1, $y1, $x2, $y2, $color = self::COLOR_FG) {
if($this->scale === 1) {
imagerectangle($im,
($x1 + $this->offsetX) * $this->scale,
($y1 + $this->offsetY) * $this->scale,
($x2 + $this->offsetX) * $this->scale,
($y2 + $this->offsetY) * $this->scale,
$this->getColor($im, $color));
} else {
imagefilledrectangle($im, ($x1 + $this->offsetX) * $this->scale, ($y1 + $this->offsetY) * $this->scale, ($x2 + $this->offsetX) * $this->scale + $this->scale - 1, ($y1 + $this->offsetY) * $this->scale + $this->scale - 1, $this->getColor($im, $color));
imagefilledrectangle($im, ($x1 + $this->offsetX) * $this->scale, ($y1 + $this->offsetY) * $this->scale, ($x1 + $this->offsetX) * $this->scale + $this->scale - 1, ($y2 + $this->offsetY) * $this->scale + $this->scale - 1, $this->getColor($im, $color));
imagefilledrectangle($im, ($x2 + $this->offsetX) * $this->scale, ($y1 + $this->offsetY) * $this->scale, ($x2 + $this->offsetX) * $this->scale + $this->scale - 1, ($y2 + $this->offsetY) * $this->scale + $this->scale - 1, $this->getColor($im, $color));
imagefilledrectangle($im, ($x1 + $this->offsetX) * $this->scale, ($y2 + $this->offsetY) * $this->scale, ($x2 + $this->offsetX) * $this->scale + $this->scale - 1, ($y2 + $this->offsetY) * $this->scale + $this->scale - 1, $this->getColor($im, $color));
}
}
protected function drawFilledRectangle($im, $x1, $y1, $x2, $y2, $color = self::COLOR_FG) {
if($x1 > $x2) { // Swap
$x1 ^= $x2 ^= $x1 ^= $x2;
}
if($y1 > $y2) { // Swap
$y1 ^= $y2 ^= $y1 ^= $y2;
}
imagefilledrectangle($im,
($x1 + $this->offsetX) * $this->scale,
($y1 + $this->offsetY) * $this->scale,
($x2 + $this->offsetX) * $this->scale + $this->scale - 1,
($y2 + $this->offsetY) * $this->scale + $this->scale - 1,
$this->getColor($im, $color));
}
protected function getColor($im, $color) {
if($color === self::COLOR_BG) {
return $this->colorBg->allocate($im);
} else {
return $this->colorFg->allocate($im);
}
}
/**
* Writes the Error on the picture
*
* @param ressource $img
* @param string $text
*/
protected function drawError(&$im, $text) {
// Is the image big enough?
$w = imagesx($im);
$h = imagesy($im);
$text = 'Error: ' . $text;
$width = imagefontwidth(2) * strlen($text);
$height = imagefontheight(2) + $this->error * 15;
if($width > $w || $height > $h) {
$width = max($w, $width);
$height = max($h, $height);
// We change the size of the image
$newimg = imagecreatetruecolor($width, $height);
imagefill($newimg, 0, 0, imagecolorat($im, 0, 0));
imagecopy($newimg, $im, 0, 0, 0, 0, $w, $h);
$im = $newimg;
}
imagestring($im, 2, 0, $this->error * 15, $text, $this->colorFg->allocate($im));
$this->error++;
}
}
?>
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