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71 lines
1.6 KiB
PHP
71 lines
1.6 KiB
PHP
<?php
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/**
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* SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
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* SPDX-FileCopyrightText: 2016 ownCloud, Inc.
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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namespace OC\Preview;
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use OCP\Files\File;
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use OCP\IImage;
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use Psr\Log\LoggerInterface;
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class SVG extends ProviderV2 {
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/**
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* {@inheritDoc}
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*/
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public function getMimeType(): string {
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return '/image\/svg\+xml/';
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}
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/**
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* {@inheritDoc}
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*/
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public function getThumbnail(File $file, int $maxX, int $maxY): ?IImage {
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try {
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$content = stream_get_contents($file->fopen('r'));
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if (substr($content, 0, 5) !== '<?xml') {
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$content = '<?xml version="1.0" encoding="UTF-8" standalone="no"?>' . $content;
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}
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// Do not parse SVG files with references
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if (preg_match('/["\s](xlink:)?href\s*=/i', $content)) {
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return null;
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}
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$svg = new \Imagick();
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$svg->pingImageBlob($content);
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$mimeType = $svg->getImageMimeType();
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if (!preg_match($this->getMimeType(), $mimeType)) {
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throw new \Exception('File mime type does not match the preview provider: ' . $mimeType);
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}
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$svg->setBackgroundColor(new \ImagickPixel('transparent'));
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$svg->readImageBlob($content);
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$svg->setImageFormat('png32');
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} catch (\Exception $e) {
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\OC::$server->get(LoggerInterface::class)->error(
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'File: ' . $file->getPath() . ' Imagick says:',
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[
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'exception' => $e,
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'app' => 'core',
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]
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);
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return null;
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}
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//new image object
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$image = new \OCP\Image();
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$image->loadFromData((string)$svg);
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//check if image object is valid
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if ($image->valid()) {
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$image->scaleDownToFit($maxX, $maxY);
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return $image;
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}
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return null;
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}
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}
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