add option to disable avif generation

lib/Helper.php

@@ -5,6 +5,7 @@
 use rex;
 use rex_version;
 use Imagick;
+use rex_config;
 
 class Helper
 {
@@ -30,8 +31,9 @@ public static function getOutputFormat($requestedTypes): string
             }
         }
 
-        // check if avif output is possible
-        if (in_array('image/avif', $requestedTypes)) {
+        // check if avif output is possible and not deactivated
+        $disable_avif = rex_config::get("media_negotiator", "disable_avif", false);
+        if (in_array('image/avif', $requestedTypes) && !$disable_avif) {
 
             // check if redaxo version >= 5.15.0 (media_manager supports avif from this version upwards, must be true for MM and Imagick)
             // and if either imageavif() is available or Imagick installed

package.yml

@@ -15,6 +15,7 @@ page:
 
 default_config:
     force_imagick: false
+    disable_avif: false
 
 requires:
     redaxo: ^5.13.0

pages/config.php

@@ -10,6 +10,12 @@
 $field->addOption('Ja', true);
 $field->addOption('Nein', false);
 
+$field = $form->addRadioField('disable_avif');
+$field->setLabel("AVIF deaktivieren.");
+$field->setNotice("Wenn der Server über keinen AVIF Codec verfügt kann die AVIF Generierung hier deaktiviert werden.");
+$field->addOption('Ja', true);
+$field->addOption('Nein', false);
+
 
 $fragment = new rex_fragment();
 $fragment->setVar('class', 'edit', false);