HB_DIRECTION_TTB  932 third_party/harfbuzz-ng/src/hb-ot-layout-gpos-table.hh       case HB_DIRECTION_TTB:
HB_DIRECTION_TTB   84 third_party/harfbuzz-ng/src/hb-ot-shape.cc     case HB_DIRECTION_TTB:
HB_DIRECTION_TTB  280 third_party/harfbuzz-ng/src/hb-ot-shape.cc       (HB_DIRECTION_IS_VERTICAL   (direction) && direction != HB_DIRECTION_TTB))