pub unsafe extern "C" fn hb_font_get_glyph_advances_for_direction(
font: *mut hb_font_t,
direction: hb_direction_t,
count: c_uint,
first_glyph: *const hb_codepoint_t,
glyph_stride: c_uint,
first_advance: *mut hb_position_t,
advance_stride: c_uint
)