Ticket #21668: 21668.3.diff

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

@@ -300 +300 @@
                 if ( ! $filename )
                         $filename = $this->generate_filename( null, null, $extension );
 
+                if ( function_exists( 'imageinterlace' ) )
+                        imageinterlace( $image, apply_filters( 'image_save_progressive', 0, $mime_type ) );
+
                 if ( 'image/gif' == $mime_type ) {
                         if ( ! $this->make_image( $filename, 'imagegif', array( $image, $filename ) ) )
                                 return new WP_Error( 'image_save_error', __('Image Editor Save Failed') );

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

@@ -358 +358 @@
                         $orig_format = $this->image->getImageFormat();
 
                         $this->image->setImageFormat( strtoupper( $this->get_extension( $mime_type ) ) );
+
+                        $interlace = apply_filters( 'image_save_progressive', 0, $mime_type );
+                        if ( $interlace ) {
+                                $this->image->setImageInterlaceScheme( strtoupper( $mime_type ) == 'PNG' ? Imagick::INTERLACE_PLANE : Imagick::INTERLACE_LINE );
+                        }
+
                         $this->make_image( $filename, array( $image, 'writeImage' ), array( $filename ) );
 
                         // Reset original Format