nextcloud/lib/preview/unknown.php

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<?php
/**
* Copyright (c) 2013 Frank Karlitschek frank@owncloud.org
* Copyrigjt (c) 2013 Georg Ehrke georg@ownCloud.com
* This file is licensed under the Affero General Public License version 3 or
* later.
* See the COPYING-README file.
*/
class OC_Preview_Unknown extends OC_Preview_Provider{
public function getMimeType(){
return '/.*/';
}
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public function getThumbnail($path, $maxX, $maxY, $scalingup,$fileview) {
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// check if GD is installed
if(!extension_loaded('gd') || !function_exists('gd_info')) {
OC_Log::write('preview', __METHOD__.'(): GD module not installed', OC_Log::ERROR);
return false;
}
// create a white image
$image = imagecreatetruecolor($maxX, $maxY);
$color = imagecolorallocate($image, 255, 255, 255);
imagefill($image, 0, 0, $color);
// output the image
imagepng($image);
imagedestroy($image);
}
}
OC_Preview::registerProvider('OC_Preview_Unknown');