Ticket #34341: 34341.diff

src/wp-includes/media.php

@@ -901 +901 @@
          */
         $img_edited = preg_match( '/-e[0-9]{13}/', $img_url, $img_edit_hash );
 
+        /**
+         * Filter the maximum width included in a srcset attribute.
+         *
+         * @since 4.4.0
+         *
+         * @param array|string $size Size of image, either array or string.
+         */
+        $max_srcset_width = apply_filters( 'max_srcset_width', 1600, $size );
+
         /*
          * Set up arrays to hold url candidates and matched image sources so
          * we can avoid duplicates without looping through the full sources array
@@ -918 +927 @@
                         continue;
                 }
 
+                // Filter out images that are wider than $max_srcset_width.
+                if ( $max_srcset_width && $img['width'] > $max_srcset_width ) {
+                        $contiue;
+                }
+
                 $candidate_url = path_join( dirname( $img_url ), $img['file'] );
 
                 // Calculate the new image ratio.