Add a webp-default module, first pass

felixarntz · Dec 7, 2021 · Dec 2, 2021 · Dec 2, 2021 · Dec 2, 2021 · Dec 3, 2021
commit 2cdbd5290358c2c8d7079df2a362cdf882f67cc0
diff --git a/load.php b/load.php
@@ -59,7 +59,11 @@ function perflab_sanitize_modules_setting( $value ) {
  * @return array Associative array of module settings keyed by module slug.
  */
 function perflab_get_module_settings() {
-	return (array) get_option( PERFLAB_MODULES_SETTING, array() );
+	return (array) get_option( PERFLAB_MODULES_SETTING, array(
+		'webp-default' => array(
+			'enabled' => true,
+		)
+	) );
 }
 
 /**

diff --git a/modules/webp-default/class-webp-default.php b/modules/webp-default/class-webp-default.php
@@ -0,0 +1,53 @@
+<?php
+/**
+ * WebP-Default Module
+ *
+ * @package performance-lab
+ * @since 1.0.0
+ */
+
+ /**
+  * WebP-Default Module
+  *
+  * Switches the default sub sized output format for images to WebP when supported.
+  *
+  * @since 1.0.0
+  */
+class WebP_Default {
+
+	/**
+	 * Constructor
+	 *
+	 * @since 1.0.0
+	 */
+	function __construct() {
+
+		// Only enable if the server supports WebP.
+		if ( ! wp_image_editor_supports( array( 'mime_type' => 'image/webp' ) ) ) {
+			return;
+		}
+		add_filter( 'image_editor_output_format', array( $this, 'webp_default_filter_image_editor_output_format' ), 10, 3 );
+	}
+
+	/**
+	 * Filter the image editor default output format mapping.
+	 *
+	 * For uploaded JPEG images, map the default output format to WebP.
+	 *
+	 * @since 1.0.0
+	 *
+	 * @param string $format The image editor default output format mapping.
+	 * @return string The new output format mapping.
+	 */
+	public function webp_default_filter_image_editor_output_format( $output_format, $filename, $mime_type ) {
+
+		// WebP lossless support is still limited on servers, so only apply to JPEGs.
+		if ( 'image/jpeg' !== $mime_type) {
+			return $output_format;
+		}
+
+		$output_format['image/jpeg'] = 'image/webp';
+
+		return $output_format;
+	}
+}
diff --git a/modules/webp-default/load.php b/modules/webp-default/load.php
@@ -0,0 +1,15 @@
+<?php
+/**
+ * Module Name: WebP default.
+ * Description: Use WebP as the default sub sized image format.
+ * 				This module changes the default format WordPress uses for
+ * 				generating sub sized images from JPEG to WebP. Requires that the
+ * 				server supports WebP and only acts on JPEG image uploads.
+ * Focus: images
+ * Experimental: No
+ *
+ * @package performance-lab
+ */
+require_once( plugin_dir_path( __FILE__ ) . 'class-webp-default.php' );
+
+new WebP_Default();