<?php
/*
* (c) Jeroen van den Enden <info@endroid.nl>
*
* This source file is subject to the MIT license that is bundled
* with this source code in the file LICENSE.
*/
namespace Endroid\QrCode\Writer;
use BaconQrCode\Renderer\Image\Svg;
use BaconQrCode\Writer;
use Endroid\QrCode\QrCodeInterface;
use SimpleXMLElement;
class SvgWriter extends AbstractBaconWriter
{
public function writeString(QrCodeInterface $qrCode)
{
$renderer = new Svg();
$renderer->setWidth($qrCode->getSize());
$renderer->setHeight($qrCode->getSize());
$renderer->setMargin(0);
$renderer->setForegroundColor($this->convertColor($qrCode->getForegroundColor()));
$renderer->setBackgroundColor($this->convertColor($qrCode->getBackgroundColor()));
$writer = new Writer($renderer);
$string = $writer->writeString($qrCode->getText(), $qrCode->getEncoding(), $this->convertErrorCorrectionLevel($qrCode->getErrorCorrectionLevel()));
$string = $this->addMargin($string, $qrCode->getMargin(), $qrCode->getSize());
return $string;
}
protected function addMargin($string, $margin, $size)
{
$targetSize = $size + $margin * 2;
$xml = new SimpleXMLElement($string);
$xml['width'] = $targetSize;
$xml['height'] = $targetSize;
$xml['viewBox'] = '0 0 '.$targetSize.' '.$targetSize;
$xml->rect['width'] = $targetSize;
$xml->rect['height'] = $targetSize;
$additionalWhitespace = $targetSize;
foreach ($xml->use as $block) {
$additionalWhitespace = min($additionalWhitespace, (int) $block['x']);
}
$sourceBlockSize = (int) $xml->defs->rect['width'];
$blockCount = ($size - 2 * $additionalWhitespace) / $sourceBlockSize;
$targetBlockSize = $size / $blockCount;
$xml->defs->rect['width'] = $targetBlockSize;
$xml->defs->rect['height'] = $targetBlockSize;
foreach ($xml->use as $block) {
$block['x'] = $margin + $targetBlockSize * ($block['x'] - $additionalWhitespace) / $sourceBlockSize;
$block['y'] = $margin + $targetBlockSize * ($block['y'] - $additionalWhitespace) / $sourceBlockSize;
}
return $xml->asXML();
}
public static function getContentType()
{
return 'image/svg+xml';
}
public static function getSupportedExtensions()
{
return ['svg'];
}
}