vendor/bacon/bacon-qr-code/src/BaconQrCode/Renderer/Image/Svg.php

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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');
    }