PangoAttrList *list = pango_attr_list_new();
PangoAttribute *features_attr = pango_attr_font_features_new(features_str.c_str());
pango_attr_list_insert(list, features_attr);
pango_layout_set_attributes(layout, list);
pango_attr_list_unref(list);
PangoAttrList *list = pango_attr_list_new();
PangoAttribute *features_attr = pango_attr_font_features_new(features_str.c_str());
pango_attr_list_insert(list, features_attr);
pango_layout_set_attributes(layout, list);
pango_attr_list_unref(list);