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<?php
/**
* BaconQrCode
*
* @link http://github.com/Bacon/BaconQrCode For the canonical source repository
* @copyright 2013 Ben 'DASPRiD' Scholzen
* @license http://opensource.org/licenses/BSD-2-Clause Simplified BSD License
*/
namespace BaconQrCode\Renderer\Image;
use BaconQrCode\Exception;
use BaconQrCode\Renderer\Color\ColorInterface;
use SimpleXMLElement;
/**
* SVG backend.
*/
class Svg extends AbstractRenderer
{
/**
* SVG resource.
*
* @var SimpleXMLElement
*/
protected $svg;
/**
* Colors used for drawing.
*
* @var array
*/
protected $colors = array();
/**
* Prototype IDs.
*
* @var array
*/
protected $prototypeIds = array();
/**
* init(): defined by RendererInterface.
*
* @see ImageRendererInterface::init()
* @return void
*/
public function init()
{
$this->svg = new SimpleXMLElement(
'<?xml version="1.0" encoding="UTF-8"?>'
. '<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"/>'
);
$this->svg->addAttribute('version', '1.1');
$this->svg->addAttribute('width', $this->finalWidth . 'px');
$this->svg->addAttribute('height', $this->finalHeight . 'px');
$this->svg->addAttribute('viewBox', '0 0 ' . $this->finalWidth . ' ' . $this->finalHeight);
$this->svg->addChild('defs');
}
/**
* addColor(): defined by RendererInterface.
*
* @see ImageRendererInterface::addColor()
* @param string $id
* @param ColorInterface $color
* @return void
* @throws Exception\InvalidArgumentException
*/
public function addColor($id, ColorInterface $color)
{
$this->colors[$id] = (string) $color->toRgb();
}
/**
* drawBackground(): defined by RendererInterface.
*
* @see ImageRendererInterface::drawBackground()
* @param string $colorId
* @return void
*/
public function drawBackground($colorId)
{
$rect = $this->svg->addChild('rect');
$rect->addAttribute('x', 0);
$rect->addAttribute('y', 0);
$rect->addAttribute('width', $this->finalWidth);
$rect->addAttribute('height', $this->finalHeight);
$rect->addAttribute('fill', '#' . $this->colors[$colorId]);
}
/**
* drawBlock(): defined by RendererInterface.
*
* @see ImageRendererInterface::drawBlock()
* @param integer $x
* @param integer $y
* @param string $colorId
* @return void
*/
public function drawBlock($x, $y, $colorId)
{
$use = $this->svg->addChild('use');
$use->addAttribute('x', $x);
$use->addAttribute('y', $y);
$use->addAttribute(
'xlink:href',
$this->getRectPrototypeId($colorId),
'http://www.w3.org/1999/xlink'
);
}
/**
* getByteStream(): defined by RendererInterface.
*
* @see ImageRendererInterface::getByteStream()
* @return string
*/
public function getByteStream()
{
return $this->svg->asXML();
}
/**
* Get the prototype ID for a color.
*
* @param integer $colorId
* @return string
*/
protected function getRectPrototypeId($colorId)
{
if (!isset($this->prototypeIds[$colorId])) {
$id = 'r' . dechex(count($this->prototypeIds));
$rect = $this->svg->defs->addChild('rect');
$rect->addAttribute('id', $id);
$rect->addAttribute('width', $this->blockSize);
$rect->addAttribute('height', $this->blockSize);
$rect->addAttribute('fill', '#' . $this->colors[$colorId]);
$this->prototypeIds[$colorId] = '#' . $id;
}
return $this->prototypeIds[$colorId];
}
}