[FEATURE] add ext_conf to globally change formats

Classes/ViewHelpers/Image/Modify/FormatViewHelper.php

@@ -4,6 +4,9 @@
 namespace Sitegeist\MediaComponents\ViewHelpers\Image\Modify;
 
 use Sitegeist\MediaComponents\Domain\Model\ImageSource;
+use SMS\FluidComponents\Interfaces\ProcessableImage;
+use TYPO3\CMS\Core\Configuration\ExtensionConfiguration;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
 
 class FormatViewHelper extends AbstractViewHelper
@@ -17,10 +20,27 @@ public function initializeArguments(): void
     public function render(): ImageSource
     {
         $imageSource = $this->arguments['imageSource'] ?? $this->renderChildren();
+
+        if (!$this->arguments['format']
+            && $imageSource->getOriginalImage() instanceof ProcessableImage
+            && in_array(
+                $imageSource->getOriginalImage()->getFile()->getExtension(),
+                $this->getForcedWebpFormats()
+            )
+        ) {
+            $this->arguments['format'] = 'webp';
+        }
+
         if ($this->arguments['format']) {
             $imageSourceWithFormat = clone $imageSource;
             $imageSourceWithFormat->setFormat($this->arguments['format']);
         }
         return $imageSourceWithFormat ?? $imageSource;
     }
+
+    private function getForcedWebpFormats(): array
+    {
+        $extensionConfiguration = GeneralUtility::makeInstance(ExtensionConfiguration::class);
+        return GeneralUtility::trimExplode(',', $extensionConfiguration->get('media_components', 'autoWebpConversionFormats'), true);
+    }
 }

README.md

@@ -12,6 +12,12 @@ This extension provides ready-to-use [Fluid Components](https://github.com/siteg
 * Video files
     * [HTML5 video tag with support for subtitles](./Resources/Private/Components/Video/Video.html)
 
+
+## WebP conversion
+
+As these components are such basic atoms, you could use them to change the format of any image to WebP to reduce file sizes. The extension configuration contains a list of file extensions that will be converted to WebP if not explicitly defined with `format=`.
+By default the `autoWebpConversionFormats` are `tif,tiff,bmp,pcx,tga,ai`, which you could extend with `gif,jpg,jpeg,png` to get full conversion to WebP (without `svg` as it already has a smaller file size).
+
 ## Usage
 
 We use the public namespace from fluid-components.

ext_conf_template.txt

@@ -0,0 +1,2 @@
+# cat=Format/enable; type=string; label=Auto WebP conversion: for specific formats, "," separated;
+autoWebpConversionFormats = tif,tiff,bmp,pcx,tga,ai