From c86548957785f985a3d50e53028c65b019aa83ef Mon Sep 17 00:00:00 2001
From: Philipp Kitzberger <coding@kitze.net>
Date: Tue, 29 Aug 2023 09:17:01 +0200
Subject: [PATCH] Don't stretch image beyond its original dimensions

---
 Classes/DataProcessing/FilesProcessor.php | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Classes/DataProcessing/FilesProcessor.php b/Classes/DataProcessing/FilesProcessor.php
index 75fab3a3..8a9eb6f7 100644
--- a/Classes/DataProcessing/FilesProcessor.php
+++ b/Classes/DataProcessing/FilesProcessor.php
@@ -205,6 +205,8 @@ protected function processFiles(array $properties = []): ?array
                 );
 
                 // 2. render additional formats
+                $originalWidth = $fileObject->getProperty('width');
+                $originalHeight = $fileObject->getProperty('height');
                 $targetWidth = (int)($properties['width'] ?? $file['properties']['dimensions']['width']);
                 $targetHeight = (int)($properties['height'] ?? $file['properties']['dimensions']['height']);
                 if ($targetWidth || $targetHeight) {
@@ -218,8 +220,10 @@ protected function processFiles(array $properties = []): ?array
                                 $properties,
                                 [
                                     'fileExtension' => $formatConf['fileExtension'] ?? null,
-                                    'width' => $targetWidth * $factor,
-                                    'height' => $targetHeight * $factor,
+                                    // multiply width/height by factor,
+                                    // but don't stretch image beyond its original dimensions!
+                                    'width' => min($targetWidth * $factor, $originalWidth),
+                                    'height' => min($targetHeight * $factor, $originalHeight),
                                 ]
                             ),
                             $cropVariant,