Ticket #21668: 21668.diff

src/wp-includes/class-wp-image-editor-gd.php

@@ -491 +491 @@
                 if ( ! $filename ) {
                         $filename = $this->generate_filename( null, null, $extension );
                 }
+                if ( function_exists( 'imageinterlace' ) ) {
+                        /** This filter is documented in wp-includes/class-wp-image-editor-imagick.php */
+                        imageinterlace( $image, apply_filters( 'image_save_progressive', false, $mime_type ) );
+                }
 
                 if ( 'image/gif' === $mime_type ) {
                         if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) ) {

src/wp-includes/class-wp-image-editor-imagick.php

@@ -478 +478 @@
                                         $this->image->setImageDepth( 8 );
                                 }
                         }
-
-                        if ( is_callable( array( $this->image, 'setInterlaceScheme' ) ) && defined( 'Imagick::INTERLACE_NO' ) ) {
-                                $this->image->setInterlaceScheme( Imagick::INTERLACE_NO );
-                        }
                 } catch ( Exception $e ) {
                         return new WP_Error( 'image_resize_error', $e->getMessage() );
                 }
@@ -814 +810 @@
                         return new WP_Error( 'image_save_error', $e->getMessage(), $filename );
                 }
 
+                if ( method_exists( $this->image, 'setInterlaceScheme' ) && defined( 'Imagick::INTERLACE_PLANE' ) ) {
+                        /**
+                         * Filters whether to use output interlaced (progressive) images.
+                         *
+                         * @since 6.5.0
+                         *
+                         * @param bool   $interlace Whether to use interlaced images. Default false.
+                         * @param string $mime_type The mime type being saved.
+                         */
+                        if( apply_filters( 'image_save_progressive', false, $mime_type ) ) {
+                                $this->image->setInterlaceScheme( Imagick::INTERLACE_NONE );
+                        } else {
+                                $this->image->setInterlaceScheme( Imagick::INTERLACE_PLANE );
+                }
+
                 $write_image_result = $this->write_image( $this->image, $filename );
                 if ( is_wp_error( $write_image_result ) ) {
                         return $write_image_result;