adamsilverstein

<?php
/**
 * Outout WebP sub size images.
 *
 * @wordpress-plugin
 * Plugin Name: WebP-only.
 * Description:  Output WebP sub size images.
 * Plugin URI:
 * Version:     1.0.0
 * Author:      Adam Silverstein, Google

adamsilverstein

<?php
/**
 * Output only WebP sub size images.
 *
 * @wordpress-plugin
 * Plugin Name: WebP-only.
 * Description:  Output only WebP sub size images.
 * Plugin URI:
 * Version:     1.0.0
 * Author:      Adam Silverstein, Google

adamsilverstein

<?php

/**
 * Use the `wp_editor_set_quality` filter for testing.
 */
function set_webp_quality() {
	return 82;
}

adamsilverstein

<?php

/**
 * Use the `wp_editor_set_quality` filter for testing.
 */
function set_webp_quality( $quality, $mime_type ) {
	error_log( sprintf( 'wp_editor_set_quality mime type: %s', $mime_type ) );
	if ( 'image/webp' === $mime_type ) {
		return 1;
	}

adamsilverstein

SELECT
  has_webp,
  APPROX_QUANTILES(bytesImg, 1000)[OFFSET(500)] / 1024 / 1024 AS median_img_mbytes
FROM (
  SELECT DISTINCT
    url,
    info AS version
  FROM
    `httparchive.technologies.2022_07_01_mobile`
  WHERE

adamsilverstein

SELECT
  mobile.version,
  ROUND(pct_webp_mobile, 3) AS pct_webp_mobile,
  ROUND(pct_webp_desktop, 3) AS pct_webp_desktop
FROM
  (
    SELECT
      version, pct_webp AS pct_webp_mobile
    FROM
      (

adamsilverstein

diff --git a/src/wp-includes/class-wp-image-editor.php b/src/wp-includes/class-wp-image-editor.php
index 6b63d7e9fd..e17b787223 100644
--- a/src/wp-includes/class-wp-image-editor.php
+++ b/src/wp-includes/class-wp-image-editor.php
@@ -414,12 +414,10 @@ abstract class WP_Image_Editor {
 			$filename = trailingslashit( $dir ) . wp_basename( $filename, ".$ext" ) . ".{$new_ext}";
 		}
 
-		if ( $mime_type && ( $mime_type !== $this->mime_type ) ) {
-			// The image will be converted when saving. Set the quality for the new mime-type if not already set.

adamsilverstein

( function( d, i, s, p ) {
	s = d.createElement( s );
	s.src = '{$fallback_url}';
	i = d.createElement( i );
	i.src = p + 'jIAAABXRUJQVlA4ICYAAACyAgCdASoCAAEALmk0mk0iIiIiIgBoSygABc6zbAAA/v56QAAAAA==';
	i.onload = function() {
		i.src = p + 'h4AAABXRUJQVlA4TBEAAAAvAQAAAAfQ//73v/+BiOh/AAA=';
	};
	i.onerror = function() {
		d.body.appendChild( s );

adamsilverstein

SELECT
  mobile.version,
  ROUND(pct_webp_mobile, 3) AS pct_webp_mobile,
  ROUND(pct_webp_desktop, 3) AS pct_webp_desktop
FROM
  (
    SELECT
      version, pct_webp AS pct_webp_mobile
    FROM
      (

adamsilverstein

➜ ll
total 45600
    166K   2 14:14 sample0-1024x576.jpg
    118K   2 14:14 sample0-1024x576.webp
    168K   2 14:14 sample0-1038x576.jpg
    120K   2 14:15 sample0-1038x576.webp
     28K   2 14:14 sample0-150x150.jpg
    7.0K   2 14:14 sample0-150x150.webp
    304K   2 14:14 sample0-1536x864.jpg
    220K   2 14:15 sample0-1536x864.webp