fix: correct calc missing attribute (height or width) depends on image aspect ratio

Quiqqer/Engine/plugins_qui/function.image.php

@@ -250,12 +250,13 @@ function smarty_function_image($params, $smarty)
         $maxHeight = $Image->getHeight();
 
         if ($maxWidth && $maxHeight) {
-            $ratio = round($maxWidth / $maxHeight);
+            $ratio = $maxWidth / $maxHeight;
         }
     } catch (Exception $Exception) {
         QUI\System\Log::addDebug($Exception->getMessage());
     }
 
+    // make sure the height and width are not greater than in original image
     if (isset($params['width']) && $params['width'] > $maxWidth) {
         $params['width'] = $maxWidth;
     }
@@ -264,12 +265,14 @@ function smarty_function_image($params, $smarty)
         $params['height'] = $maxHeight;
     }
 
+    // calc correct width or height if one of them is not passed in
+    // 1. rounds a number up - only integer is allowed als html width and height attribute
     if ($ratio && empty($params['width']) && !empty($params['height'])) {
-        $params['width'] = $params['height'] * $ratio;
+        $params['width'] = ceil($params['height'] * $ratio); // (1)
     }
 
     if ($ratio && empty($params['height']) && !empty($params['width'])) {
-        $params['height'] = $params['width'] * $ratio;
+        $params['height'] = ceil($params['width'] / $ratio); // (1)
     }
 
     switch ($params['type']) {