From d0f3304fe7f46c51fa8c2c00f3a3def8285c61f9 Mon Sep 17 00:00:00 2001
From: Alexander Ebert <ebert@woltlab.com>
Date: Thu, 3 Aug 2023 13:24:21 +0200
Subject: [PATCH] Explicitly cast the thumbnail dimensions into int

The requested dimensions could be a result of a calculation that yields float values. `Imagick::thumbnailImage()` expects integers and will throw in PHP 8.1+ if it cannot safely cast them to int.
---
 .../lib/system/image/adapter/ImagickImageAdapter.class.php     | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php b/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php
index f2e9d0d2d62..e414f312dc0 100644
--- a/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php
+++ b/wcfsetup/install/files/lib/system/image/adapter/ImagickImageAdapter.class.php
@@ -125,6 +125,9 @@ public function createEmptyImage($width, $height)
      */
     public function createThumbnail($maxWidth, $maxHeight, $preserveAspectRatio = true)
     {
+        $maxHeight = (int)$maxHeight;
+        $maxWidth = (int)$maxWidth;
+
         $thumbnail = clone $this->imagick;
 
         if ($thumbnail->getImageFormat() == 'GIF') {