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jsasg
2026-03-17 09:56:00 +08:00
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addons/qrcode/library/Endroid/QrCode/Writer/SvgWriter.php Normal file
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<?php
declare(strict_types=1);
/*
* (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 Endroid\QrCode\Exception\GenerateImageException;
use Endroid\QrCode\Exception\MissingLogoHeightException;
use Endroid\QrCode\Exception\ValidationException;
use Endroid\QrCode\QrCodeInterface;
use SimpleXMLElement;
class SvgWriter extends AbstractWriter
{
public function writeString(QrCodeInterface $qrCode): string
{
$options = $qrCode->getWriterOptions();
if ($qrCode->getValidateResult()) {
throw new ValidationException('Built-in validation reader can not check SVG images: please disable via setValidateResult(false)');
}
$data = $qrCode->getData();
$svg = new SimpleXMLElement('<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"/>');
$svg->addAttribute('version', '1.1');
$svg->addAttribute('width', $data['outer_width'].'px');
$svg->addAttribute('height', $data['outer_height'].'px');
$svg->addAttribute('viewBox', '0 0 '.$data['outer_width'].' '.$data['outer_height']);
$svg->addChild('defs');
// Block definition
$block_id = isset($options['rect_id']) && $options['rect_id'] ? $options['rect_id'] : 'block';
$blockDefinition = $svg->defs->addChild('rect');
$blockDefinition->addAttribute('id', $block_id);
$blockDefinition->addAttribute('width', strval($data['block_size']));
$blockDefinition->addAttribute('height', strval($data['block_size']));
$blockDefinition->addAttribute('fill', '#'.sprintf('%02x%02x%02x', $qrCode->getForegroundColor()['r'], $qrCode->getForegroundColor()['g'], $qrCode->getForegroundColor()['b']));
$blockDefinition->addAttribute('fill-opacity', strval($this->getOpacity($qrCode->getForegroundColor()['a'])));
// Background
$background = $svg->addChild('rect');
$background->addAttribute('x', '0');
$background->addAttribute('y', '0');
$background->addAttribute('width', strval($data['outer_width']));
$background->addAttribute('height', strval($data['outer_height']));
$background->addAttribute('fill', '#'.sprintf('%02x%02x%02x', $qrCode->getBackgroundColor()['r'], $qrCode->getBackgroundColor()['g'], $qrCode->getBackgroundColor()['b']));
$background->addAttribute('fill-opacity', strval($this->getOpacity($qrCode->getBackgroundColor()['a'])));
foreach ($data['matrix'] as $row => $values) {
foreach ($values as $column => $value) {
if (1 === $value) {
$block = $svg->addChild('use');
$block->addAttribute('x', strval($data['margin_left'] + $data['block_size'] * $column));
$block->addAttribute('y', strval($data['margin_left'] + $data['block_size'] * $row));
$block->addAttribute('xlink:href', '#'.$block_id, 'http://www.w3.org/1999/xlink');
}
}
}
$logoPath = $qrCode->getLogoPath();
if (is_string($logoPath)) {
$forceXlinkHref = false;
if (isset($options['force_xlink_href']) && $options['force_xlink_href']) {
$forceXlinkHref = true;
}
$this->addLogo($svg, $data['outer_width'], $data['outer_height'], $logoPath, $qrCode->getLogoWidth(), $qrCode->getLogoHeight(), $forceXlinkHref);
}
$xml = $svg->asXML();
if (!is_string($xml)) {
throw new GenerateImageException('Unable to save SVG XML');
}
if (isset($options['exclude_xml_declaration']) && $options['exclude_xml_declaration']) {
$xml = str_replace("<?xml version=\"1.0\"?>\n", '', $xml);
}
return $xml;
}
private function addLogo(SimpleXMLElement $svg, int $imageWidth, int $imageHeight, string $logoPath, int $logoWidth = null, int $logoHeight = null, bool $forceXlinkHref = false): void
{
$mimeType = $this->getMimeType($logoPath);
$imageData = file_get_contents($logoPath);
if (!is_string($imageData)) {
throw new GenerateImageException('Unable to read image data: check your logo path');
}
if ('image/svg+xml' === $mimeType && (null === $logoHeight || null === $logoWidth)) {
throw new MissingLogoHeightException('SVG Logos require an explicit height set via setLogoSize($width, $height)');
}
if (null === $logoHeight || null === $logoWidth) {
$logoImage = imagecreatefromstring(strval($imageData));
if (!$logoImage) {
throw new GenerateImageException('Unable to generate image: check your GD installation or logo path');
}
/** @var mixed $logoImage */
$logoSourceWidth = imagesx($logoImage);
$logoSourceHeight = imagesy($logoImage);
if (PHP_VERSION_ID < 80000) {
imagedestroy($logoImage);
}
if (null === $logoWidth) {
$logoWidth = $logoSourceWidth;
}
if (null === $logoHeight) {
$aspectRatio = $logoWidth / $logoSourceWidth;
$logoHeight = intval($logoSourceHeight * $aspectRatio);
}
}
$logoX = $imageWidth / 2 - $logoWidth / 2;
$logoY = $imageHeight / 2 - $logoHeight / 2;
$imageDefinition = $svg->addChild('image');
$imageDefinition->addAttribute('x', strval($logoX));
$imageDefinition->addAttribute('y', strval($logoY));
$imageDefinition->addAttribute('width', strval($logoWidth));
$imageDefinition->addAttribute('height', strval($logoHeight));
$imageDefinition->addAttribute('preserveAspectRatio', 'none');
// xlink:href is actually deprecated, but still required when placing the qr code in a pdf.
// SimpleXML strips out the xlink part by using addAttribute(), so it must be set directly.
if ($forceXlinkHref) {
$imageDefinition['xlink:href'] = 'data:'.$mimeType.';base64,'.base64_encode($imageData);
} else {
$imageDefinition->addAttribute('href', 'data:'.$mimeType.';base64,'.base64_encode($imageData));
}
}
private function getOpacity(int $alpha): float
{
$opacity = 1 - $alpha / 127;
return $opacity;
}
public static function getContentType(): string
{
return 'image/svg+xml';
}
public static function getSupportedExtensions(): array
{
return ['svg'];
}
public function getName(): string
{
return 'svg';
}
}