From 58b2ac9392d2677c4becd317c89844d3e7ef28e6 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Mon, 11 Jan 2021 16:02:46 +0100
Subject: [PATCH] Support for WebP images (#3861)

* Support for WebP images

* Inconsistent quote style
---
 com.woltlab.wcf/userGroupOption.xml                  |  6 +++++-
 wcfsetup/install/files/acp/templates/systemCheck.tpl |  3 +++
 .../install/files/js/3rdParty/redactor2/redactor.js  |  2 +-
 wcfsetup/install/files/js/WCF.Attachment.js          |  4 ++--
 wcfsetup/install/files/js/WCF.js                     |  4 ++++
 .../install/files/js/WoltLabSuite/Core/Upload.js     |  3 +++
 .../files/lib/acp/page/SystemCheckPage.class.php     |  6 +++++-
 .../files/lib/data/style/StyleEditor.class.php       |  4 ++--
 .../lib/data/user/avatar/UserAvatarAction.class.php  |  2 +-
 .../install/files/lib/page/AttachmentPage.class.php  |  2 +-
 wcfsetup/install/files/lib/page/MediaPage.class.php  |  3 ++-
 .../lib/system/file/upload/UploadHandler.class.php   |  2 +-
 .../system/image/adapter/GDImageAdapter.class.php    | 12 +++++++++++-
 ...rCoverPhotoUploadFileValidationStrategy.class.php |  2 +-
 wcfsetup/install/files/lib/util/FileUtil.class.php   |  2 +-
 wcfsetup/install/files/lib/util/ImageUtil.class.php  |  4 +++-
 .../install/files/ts/WoltLabSuite/Core/Upload.ts     |  3 +++
 wcfsetup/install/lang/de.xml                         |  6 +++---
 wcfsetup/install/lang/en.xml                         |  6 +++---
 19 files changed, 55 insertions(+), 21 deletions(-)

diff --git a/com.woltlab.wcf/userGroupOption.xml b/com.woltlab.wcf/userGroupOption.xml
index db4b497396..79a68163a5 100644
--- a/com.woltlab.wcf/userGroupOption.xml
+++ b/com.woltlab.wcf/userGroupOption.xml
@@ -572,6 +572,7 @@
 jpg
 jpeg
 png
+webp
 bmp
 zip
 txt
@@ -624,6 +625,7 @@ pdf</defaultvalue>
 jpg
 jpeg
 png
+webp
 bmp
 zip
 txt
@@ -685,6 +687,7 @@ pdf</defaultvalue>
 jpg
 jpeg
 png
+webp
 bmp</defaultvalue>
 				<wildcard>*</wildcard>
 				<options>module_user_signature</options>
@@ -811,7 +814,8 @@ bmp</defaultvalue>
 				<defaultvalue>gif
 jpg
 jpeg
-png</defaultvalue>
+png
+webp</defaultvalue>
 				<usersonly>1</usersonly>
 			</option>
 			<option name="user.profile.coverPhoto.canSeeCoverPhotos">
diff --git a/wcfsetup/install/files/acp/templates/systemCheck.tpl b/wcfsetup/install/files/acp/templates/systemCheck.tpl
index 4a61d86424..5885be1563 100644
--- a/wcfsetup/install/files/acp/templates/systemCheck.tpl
+++ b/wcfsetup/install/files/acp/templates/systemCheck.tpl
@@ -118,6 +118,9 @@
 					{if !$results[php][gd][png]}
 						<li>{@$statusInsufficient} <kbd>png</kbd></li>
 					{/if}
+				        {if !$results[php][gd][webp]}
+						<li>{@$statusInsufficient} <kbd>webp</kbd></li>
+					{/if}
 				</ul>
 			{/if}
 			<small>{lang}wcf.acp.systemCheck.php.gd.description{/lang}</small>
diff --git a/wcfsetup/install/files/js/3rdParty/redactor2/redactor.js b/wcfsetup/install/files/js/3rdParty/redactor2/redactor.js
index 3f9b995699..3e27079dd9 100644
--- a/wcfsetup/install/files/js/3rdParty/redactor2/redactor.js
+++ b/wcfsetup/install/files/js/3rdParty/redactor2/redactor.js
@@ -494,7 +494,7 @@
 		emptyHtml: '<p>&#x200b;</p>',
 		invisibleSpace: '&#x200b;',
 		emptyHtmlRendered: $('').html('​').html(),
-		imageTypes: ['image/png', 'image/jpeg', 'image/gif'],
+		imageTypes: ['image/png', 'image/jpeg', 'image/gif', 'image/webp'],
 		userAgent: navigator.userAgent.toLowerCase(),
 		observe: {
 			dropdowns: []
diff --git a/wcfsetup/install/files/js/WCF.Attachment.js b/wcfsetup/install/files/js/WCF.Attachment.js
index 80c031f577..4ced08677c 100644
--- a/wcfsetup/install/files/js/WCF.Attachment.js
+++ b/wcfsetup/install/files/js/WCF.Attachment.js
@@ -335,8 +335,8 @@ WCF.Attachment.Upload = WCF.Upload.extend({
 				// As our resizer is based on Pica it will use multiple workers per image if possible.
 				promise = Array.prototype.reduce.call(files, (function (acc, file) {
 					return acc.then((function (arr) {
-						// Ignore anything that is not one of the 3 basic image types.
-						if (['image/png', 'image/gif', 'image/jpeg'].indexOf(file.type) === -1) {
+						// Ignore anything that is not one of the 4 basic image types.
+						if (['image/png', 'image/gif', 'image/jpeg', 'image/webp'].indexOf(file.type) === -1) {
 							arr.push(file);
 							return arr;
 						}
diff --git a/wcfsetup/install/files/js/WCF.js b/wcfsetup/install/files/js/WCF.js
index 2bfd8782b7..9e80380a4a 100755
--- a/wcfsetup/install/files/js/WCF.js
+++ b/wcfsetup/install/files/js/WCF.js
@@ -6076,6 +6076,10 @@ WCF.Upload = Class.extend({
 					case 'image/gif':
 						$ext = '.gif';
 						break;
+					
+					case 'image/webp':
+						$ext = '.webp';
+						break;
 				}
 				
 				$files.push({
diff --git a/wcfsetup/install/files/js/WoltLabSuite/Core/Upload.js b/wcfsetup/install/files/js/WoltLabSuite/Core/Upload.js
index b97bf49df0..74a86faab1 100644
--- a/wcfsetup/install/files/js/WoltLabSuite/Core/Upload.js
+++ b/wcfsetup/install/files/js/WoltLabSuite/Core/Upload.js
@@ -215,6 +215,9 @@ define(["require", "exports", "tslib", "./Ajax/Request", "./Core", "./Dom/Change
                     case "image/png":
                         fileExtension = "png";
                         break;
+                    case "image/webp":
+                        fileExtension = "webp";
+                        break;
                 }
                 files.push({
                     name: `pasted-from-clipboard.${fileExtension}`,
diff --git a/wcfsetup/install/files/lib/acp/page/SystemCheckPage.class.php b/wcfsetup/install/files/lib/acp/page/SystemCheckPage.class.php
index 198788a85d..a0c35089da 100644
--- a/wcfsetup/install/files/lib/acp/page/SystemCheckPage.class.php
+++ b/wcfsetup/install/files/lib/acp/page/SystemCheckPage.class.php
@@ -133,6 +133,7 @@ class SystemCheckPage extends AbstractPage {
 			'gd' => [
 				'jpeg' => false,
 				'png' => false,
+				'webp' => false,
 				'result' => false,
 			],
 			'extension' => [],
@@ -384,8 +385,11 @@ class SystemCheckPage extends AbstractPage {
 		$gdInfo = \gd_info();
 		$this->results['php']['gd']['jpeg'] = !empty($gdInfo['JPEG Support']);
 		$this->results['php']['gd']['png'] = !empty($gdInfo['PNG Support']);
+		$this->results['php']['gd']['webp'] = !empty($gdInfo['WebP Support']);
 		
-		$this->results['php']['gd']['result'] = $this->results['php']['gd']['jpeg'] && $this->results['php']['gd']['png'];
+		$this->results['php']['gd']['result'] = $this->results['php']['gd']['jpeg']
+			&& $this->results['php']['gd']['png']
+			&& $this->results['php']['gd']['webp'];
 		
 		$this->results['status']['php'] = $this->results['status']['php'] && $this->results['php']['gd']['result'];
 	}
diff --git a/wcfsetup/install/files/lib/data/style/StyleEditor.class.php b/wcfsetup/install/files/lib/data/style/StyleEditor.class.php
index e8cc533f41..51354466ce 100644
--- a/wcfsetup/install/files/lib/data/style/StyleEditor.class.php
+++ b/wcfsetup/install/files/lib/data/style/StyleEditor.class.php
@@ -43,7 +43,7 @@ use wcf\util\XMLWriter;
 class StyleEditor extends DatabaseObjectEditor implements IEditableCachedObject {
 	const EXCLUDE_WCF_VERSION = '6.0.0 Alpha 1';
 	const INFO_FILE = 'style.xml';
-	const VALID_IMAGE_EXTENSIONS = ['gif', 'jpg', 'jpeg', 'png', 'svg', 'xml', 'json'];
+	const VALID_IMAGE_EXTENSIONS = ['gif', 'jpg', 'jpeg', 'png', 'svg', 'xml', 'json', 'webp'];
 	
 	/**
 	 * list of compatible API versions
@@ -904,7 +904,7 @@ class StyleEditor extends DatabaseObjectEditor implements IEditableCachedObject
 			$imagesTar = new TarWriter($imagesTarName);
 			FileUtil::makeWritable($imagesTarName);
 			
-			$regEx = new Regex('\.(jpg|jpeg|gif|png|svg|ico|json|xml|txt)$', Regex::CASE_INSENSITIVE);
+			$regEx = new Regex('\.(jpg|jpeg|gif|png|svg|ico|json|xml|txt|webp)$', Regex::CASE_INSENSITIVE);
 			$iterator = new \RecursiveIteratorIterator(
 				new \RecursiveDirectoryIterator(
 					$this->getAssetPath(),
diff --git a/wcfsetup/install/files/lib/data/user/avatar/UserAvatarAction.class.php b/wcfsetup/install/files/lib/data/user/avatar/UserAvatarAction.class.php
index e63fac3b3b..9c99416f2d 100644
--- a/wcfsetup/install/files/lib/data/user/avatar/UserAvatarAction.class.php
+++ b/wcfsetup/install/files/lib/data/user/avatar/UserAvatarAction.class.php
@@ -149,7 +149,7 @@ class UserAvatarAction extends AbstractDatabaseObjectAction {
 		if ($imageData !== false) {
 			$tmp['extension'] = ImageUtil::getExtensionByMimeType($imageData['mime']);
 			
-			if (!in_array($tmp['extension'], ['jpeg', 'jpg', 'png', 'gif'])) {
+			if (!in_array($tmp['extension'], ['jpeg', 'jpg', 'png', 'gif', 'webp'])) {
 				@unlink($filename);
 				return;
 			}
diff --git a/wcfsetup/install/files/lib/page/AttachmentPage.class.php b/wcfsetup/install/files/lib/page/AttachmentPage.class.php
index 182f98d674..ab25f3f70a 100644
--- a/wcfsetup/install/files/lib/page/AttachmentPage.class.php
+++ b/wcfsetup/install/files/lib/page/AttachmentPage.class.php
@@ -56,7 +56,7 @@ class AttachmentPage extends AbstractPage {
 	 * list of mime types which belong to files that are displayed inline
 	 * @var	string[]
 	 */
-	public static $inlineMimeTypes = ['image/gif', 'image/jpeg', 'image/png', 'image/x-png', 'application/pdf', 'image/pjpeg'];
+	public static $inlineMimeTypes = ['image/gif', 'image/jpeg', 'image/png', 'image/x-png', 'application/pdf', 'image/pjpeg', 'image/webp'];
 	
 	/**
 	 * etag for this attachment
diff --git a/wcfsetup/install/files/lib/page/MediaPage.class.php b/wcfsetup/install/files/lib/page/MediaPage.class.php
index 6d7e1c2a7c..2a922fe7dd 100644
--- a/wcfsetup/install/files/lib/page/MediaPage.class.php
+++ b/wcfsetup/install/files/lib/page/MediaPage.class.php
@@ -64,7 +64,8 @@ class MediaPage extends AbstractPage {
 		'image/png',
 		'image/x-png',
 		'application/pdf',
-		'image/pjpeg'
+		'image/pjpeg',
+		'image/webp',
 	];
 	
 	/**
diff --git a/wcfsetup/install/files/lib/system/file/upload/UploadHandler.class.php b/wcfsetup/install/files/lib/system/file/upload/UploadHandler.class.php
index 7c4e92903d..f27ac697b8 100644
--- a/wcfsetup/install/files/lib/system/file/upload/UploadHandler.class.php
+++ b/wcfsetup/install/files/lib/system/file/upload/UploadHandler.class.php
@@ -27,7 +27,7 @@ class UploadHandler extends SingletonFactory {
 	 * @var string
 	 * @deprecated 5.3 Use \wcf\util\ImageUtil::$imageExtensions instead (direct replacement).
 	 */
-	const VALID_IMAGE_EXTENSIONS = ['jpeg', 'jpg', 'png', 'gif'];
+	const VALID_IMAGE_EXTENSIONS = ['jpeg', 'jpg', 'png', 'gif', 'webp'];
 	
 	/**
 	 * Contains the registered upload fields. 
diff --git a/wcfsetup/install/files/lib/system/image/adapter/GDImageAdapter.class.php b/wcfsetup/install/files/lib/system/image/adapter/GDImageAdapter.class.php
index 5ffad16438..9d61e08f67 100644
--- a/wcfsetup/install/files/lib/system/image/adapter/GDImageAdapter.class.php
+++ b/wcfsetup/install/files/lib/system/image/adapter/GDImageAdapter.class.php
@@ -111,9 +111,16 @@ class GDImageAdapter implements IImageAdapter {
 				}
 			break;
 			
+			case IMAGETYPE_WEBP:
+				// suppress warnings and properly handle errors
+				$this->image = @imagecreatefromwebp($file);
+				if ($this->image === false) {
+					throw new SystemException("Could not read webp image '".$file."'.");
+				}
+			break;
+			
 			default:
 				throw new SystemException("Could not read image '".$file."', format is not recognized.");
-			break;
 		}
 	}
 	
@@ -348,6 +355,9 @@ class GDImageAdapter implements IImageAdapter {
 		else if ($this->type == IMAGETYPE_PNG) {
 			imagepng($image);
 		}
+		else if ($this->type == IMAGETYPE_WEBP) {
+			imagewebp($image);
+		}
 		else if (function_exists('imageJPEG')) {
 			imagejpeg($image, null, 90);
 		}
diff --git a/wcfsetup/install/files/lib/system/upload/UserCoverPhotoUploadFileValidationStrategy.class.php b/wcfsetup/install/files/lib/system/upload/UserCoverPhotoUploadFileValidationStrategy.class.php
index efc03f5387..d937531bb6 100644
--- a/wcfsetup/install/files/lib/system/upload/UserCoverPhotoUploadFileValidationStrategy.class.php
+++ b/wcfsetup/install/files/lib/system/upload/UserCoverPhotoUploadFileValidationStrategy.class.php
@@ -19,7 +19,7 @@ class UserCoverPhotoUploadFileValidationStrategy implements IUploadFileValidatio
 	 * list of allowed file extensions
 	 * @var string[]
 	 */
-	public static $allowedExtensions = ['gif', 'jpg', 'jpeg', 'png'];
+	public static $allowedExtensions = ['gif', 'jpg', 'jpeg', 'png', 'webp'];
 	
 	/**
 	 * @inheritDoc
diff --git a/wcfsetup/install/files/lib/util/FileUtil.class.php b/wcfsetup/install/files/lib/util/FileUtil.class.php
index 95b998227b..2e4887656d 100644
--- a/wcfsetup/install/files/lib/util/FileUtil.class.php
+++ b/wcfsetup/install/files/lib/util/FileUtil.class.php
@@ -659,7 +659,7 @@ final class FileUtil {
 			// excel
 			'xls' => 'excel', 'ods' => 'excel', 'xlsx' => 'excel',
 			// image
-			'gif' => 'image', 'jpg' => 'image', 'jpeg' => 'image', 'png' => 'image', 'bmp' => 'image',
+			'gif' => 'image', 'jpg' => 'image', 'jpeg' => 'image', 'png' => 'image', 'bmp' => 'image', 'webp' => 'image',
 			// video
 			'avi' => 'video', 'wmv' => 'video', 'mov' => 'video', 'mp4' => 'video', 'mpg' => 'video', 'mpeg' => 'video', 'flv' => 'video',
 			// pdf
diff --git a/wcfsetup/install/files/lib/util/ImageUtil.class.php b/wcfsetup/install/files/lib/util/ImageUtil.class.php
index 51dd03b3f3..9bfa60939d 100644
--- a/wcfsetup/install/files/lib/util/ImageUtil.class.php
+++ b/wcfsetup/install/files/lib/util/ImageUtil.class.php
@@ -16,7 +16,7 @@ final class ImageUtil {
 	 * image extensions
 	 * @var array
 	 */
-	protected static $imageExtensions = ['jpeg', 'jpg', 'png', 'gif'];
+	protected static $imageExtensions = ['jpeg', 'jpg', 'png', 'gif', "webp"];
 	
 	/**
 	 * Checks the content of an image for bad sections, e.g. the use of javascript
@@ -92,6 +92,8 @@ final class ImageUtil {
 				return 'bmp';
 			case 'image/tiff':
 				return 'tiff';
+			case 'image/webp':
+				return 'webp';
 			default:
 				return '';
 		}
diff --git a/wcfsetup/install/files/ts/WoltLabSuite/Core/Upload.ts b/wcfsetup/install/files/ts/WoltLabSuite/Core/Upload.ts
index e54c181f05..b7b6cd3214 100644
--- a/wcfsetup/install/files/ts/WoltLabSuite/Core/Upload.ts
+++ b/wcfsetup/install/files/ts/WoltLabSuite/Core/Upload.ts
@@ -278,6 +278,9 @@ abstract class Upload<TOptions extends UploadOptions = UploadOptions> {
         case "image/png":
           fileExtension = "png";
           break;
+        case "image/webp":
+          fileExtension = "webp";
+          break;
       }
       files.push({
         name: `pasted-from-clipboard.${fileExtension}`,
diff --git a/wcfsetup/install/lang/de.xml b/wcfsetup/install/lang/de.xml
index 0f192deea9..7b72bbe8c9 100644
--- a/wcfsetup/install/lang/de.xml
+++ b/wcfsetup/install/lang/de.xml
@@ -2766,7 +2766,7 @@ Kein Abschnitt darf leer sein und alle Abschnitten dürfen nur folgende Zeichen
 		<item name="wcf.acp.systemCheck.directories.writable"><![CDATA[Beschreibbare Verzeichnisse]]></item>
 		<item name="wcf.acp.systemCheck.directories.writable.description"><![CDATA[Einige Verzeichnisse werden zur Laufzeit durch die Software beschrieben, der PHP-Benutzer muss Schreibrechte haben.]]></item>
 		<item name="wcf.acp.systemCheck.php.gd"><![CDATA[Unterstützte Formate der GD-Bibliothek]]></item>
-		<item name="wcf.acp.systemCheck.php.gd.description"><![CDATA[Die GD-Bibliothek muss inklusive der Unterstützung der Formate „jpeg“ und „png“ installiert sein.]]></item>
+		<item name="wcf.acp.systemCheck.php.gd.description"><![CDATA[Die GD-Bibliothek muss inklusive der Unterstützung der Formate „jpeg“, „png“ und „webp“ installiert sein.]]></item>
 	</category>
 	<category name="wcf.acp.updateServer">
 		<item name="wcf.acp.updateServer.add"><![CDATA[Server hinzufügen]]></item>
@@ -4019,7 +4019,7 @@ Dateianhänge:
 		<item name="wcf.image.coverPhoto.upload.error.minWidth"><![CDATA[Das Bild ist zu schmal.]]></item>
 		<item name="wcf.image.coverPhoto.upload.error.uploadFailed"><![CDATA[Beim Hochladen der Datei ist ein unbekannter Fehler aufgetreten.]]></item>
 		<item name="wcf.image.coverPhoto.upload.error.invalidExtension"><![CDATA[Die Datei hat eine ungültige Dateiendung.]]></item>
-		<item name="wcf.image.coverPhoto.upload.limits"><![CDATA[Minimale Bildgröße: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} Pixel<br>Maximale Bildgröße: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} Pixel<br>Erlaubte Dateiendungen: gif, jpg, jpeg, png<br>Maximale Dateigröße: {$__wcf->session->getPermission($coverPhotoPermissionMaxSize)|filesize}]]></item>
+		<item name="wcf.image.coverPhoto.upload.limits"><![CDATA[Minimale Bildgröße: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} Pixel<br>Maximale Bildgröße: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} Pixel<br>Erlaubte Dateiendungen: gif, jpg, jpeg, png, webp<br>Maximale Dateigröße: {$__wcf->session->getPermission($coverPhotoPermissionMaxSize)|filesize}]]></item>
 	</category>
 	<category name="wcf.imageViewer">
 		<item name="wcf.imageViewer.button.enlarge"><![CDATA[Vollbild-Modus]]></item>
@@ -5184,7 +5184,7 @@ Die E-Mail-Adresse des neuen Benutzers lautet: {@$user->email}
 		<item name="wcf.user.coverPhoto.error.disabled"><![CDATA[Der Administrator hat{if $__wcf->user->coverPhotoHash} {if LANGUAGE_USE_INFORMAL_VARIANT}dein{else}Ihr{/if} derzeitiges Titelbild gesperrt und{/if} {if LANGUAGE_USE_INFORMAL_VARIANT}dir{else}Ihnen{/if} die weitere Nutzungsberechtigung der Titelbild-Funktion {if !$__wcf->user->disableCoverPhotoReason}entzogen.{else} aus folgenden Gründen entzogen: {$__wcf->user->disableCoverPhotoReason}{/if}]]></item>
 		<item name="wcf.user.coverPhoto.noImage"><![CDATA[Der Benutzer hat noch kein Titelbild hochgeladen.]]></item>
 		<item name="wcf.user.coverPhoto.upload"><![CDATA[Titelbild hochladen]]></item>
-		<item name="wcf.user.coverPhoto.upload.description"><![CDATA[Minimale Bildgröße: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} Pixel<br>Maximale Bildgröße: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} Pixel<br>Erlaubte Dateiendungen: gif, jpg, jpeg, png<br>Maximale Dateigröße: {$__wcf->session->getPermission('user.profile.coverPhoto.maxSize')|filesize}]]></item>
+		<item name="wcf.user.coverPhoto.upload.description"><![CDATA[Minimale Bildgröße: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} Pixel<br>Maximale Bildgröße: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} Pixel<br>Erlaubte Dateiendungen: gif, jpg, jpeg, png, webp<br>Maximale Dateigröße: {$__wcf->session->getPermission('user.profile.coverPhoto.maxSize')|filesize}]]></item>
 		<item name="wcf.user.coverPhoto.upload.error.badImage"><![CDATA[{if LANGUAGE_USE_INFORMAL_VARIANT}Du hast{else}Sie haben{/if} kein gültiges Bild hochgeladen.]]></item>
 		<item name="wcf.user.coverPhoto.upload.error.fileExtension"><![CDATA[Die Datei hat eine ungültige Dateiendung.]]></item>
 		<item name="wcf.user.coverPhoto.upload.error.maxHeight"><![CDATA[Das Bild ist zu hoch.]]></item>
diff --git a/wcfsetup/install/lang/en.xml b/wcfsetup/install/lang/en.xml
index 073855adbc..8e7e61aee8 100644
--- a/wcfsetup/install/lang/en.xml
+++ b/wcfsetup/install/lang/en.xml
@@ -2694,7 +2694,7 @@ If you have <strong>already bought the licenses for the listed apps</strong>, th
 		<item name="wcf.acp.systemCheck.directories.writable"><![CDATA[Writable Directories]]></item>
 		<item name="wcf.acp.systemCheck.directories.writable.description"><![CDATA[Some directories are being written to during the normal operation. The user that runs the PHP process must have write access.]]></item>
 		<item name="wcf.acp.systemCheck.php.gd"><![CDATA[Supported formats of the GD library]]></item>
-		<item name="wcf.acp.systemCheck.php.gd.description"><![CDATA[The GD library must be installed with support for the formats “jpeg” and “png”.]]></item>
+		<item name="wcf.acp.systemCheck.php.gd.description"><![CDATA[The GD library must be installed with support for the formats “jpeg”, “png” and “webp”.]]></item>
 	</category>
 	<category name="wcf.acp.updateServer">
 		<item name="wcf.acp.updateServer.add"><![CDATA[Add Server]]></item>
@@ -3965,7 +3965,7 @@ Attachments:
 		<item name="wcf.image.coverPhoto.upload.error.minWidth"><![CDATA[The image is too small.]]></item>
 		<item name="wcf.image.coverPhoto.upload.error.uploadFailed"><![CDATA[An unknown error occurred during the upload.]]></item>
 		<item name="wcf.image.coverPhoto.upload.error.invalidExtension"><![CDATA[The file extension is invalid.]]></item>
-		<item name="wcf.image.coverPhoto.upload.limits"><![CDATA[Minimum Image Size: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} pixels<br>Maximum Image Size: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} pixels<br>Allowed File Extensions: gif, jpg, jpeg, png<br>Maximum Filesize: {$__wcf->session->getPermission($coverPhotoPermissionMaxSize)|filesize}]]></item>
+		<item name="wcf.image.coverPhoto.upload.limits"><![CDATA[Minimum Image Size: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} pixels<br>Maximum Image Size: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} pixels<br>Allowed File Extensions: gif, jpg, jpeg, png, webp<br>Maximum Filesize: {$__wcf->session->getPermission($coverPhotoPermissionMaxSize)|filesize}]]></item>
 	</category>
 	<category name="wcf.imageViewer">
 		<item name="wcf.imageViewer.button.enlarge"><![CDATA[Full Screen Mode]]></item>
@@ -5181,7 +5181,7 @@ You also received a list of emergency codes to use when your second factor becom
 		<item name="wcf.user.coverPhoto.error.disabled"><![CDATA[The administrators {if $__wcf->user->coverPhotoHash}have banned your cover photo and {/if}disallowed you from using a cover photo{if $__wcf->user->disableCoverPhotoReason}: {$__wcf->user->disableCoverPhotoReason}{/if}.]]></item>
 		<item name="wcf.user.coverPhoto.noImage"><![CDATA[The user has not yet uploaded a cover photo.]]></item>
 		<item name="wcf.user.coverPhoto.upload"><![CDATA[Upload Cover Photo]]></item>
-		<item name="wcf.user.coverPhoto.upload.description"><![CDATA[Minimum Image Size: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} pixels<br>Maximum Image Size: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} pixels<br>Allowed File Extensions: gif, jpg, jpeg, png<br>Maximum Filesize: {$__wcf->session->getPermission('user.profile.coverPhoto.maxSize')|filesize}]]></item>
+		<item name="wcf.user.coverPhoto.upload.description"><![CDATA[Minimum Image Size: {$coverPhotoDimensions.min.width}×{$coverPhotoDimensions.min.height} pixels<br>Maximum Image Size: {$coverPhotoDimensions.max.width}×{$coverPhotoDimensions.max.height} pixels<br>Allowed File Extensions: gif, jpg, jpeg, png, webp<br>Maximum Filesize: {$__wcf->session->getPermission('user.profile.coverPhoto.maxSize')|filesize}]]></item>
 		<item name="wcf.user.coverPhoto.upload.error.badImage"><![CDATA[The uploaded file is not an image.]]></item>
 		<item name="wcf.user.coverPhoto.upload.error.fileExtension"><![CDATA[The file has an invalid extension.]]></item>
 		<item name="wcf.user.coverPhoto.upload.error.maxHeight"><![CDATA[The image is too tall.]]></item>
-- 
2.20.1