Function cairo_sys::cairo_user_font_face_set_text_to_glyphs_func

pub unsafe extern "C" fn cairo_user_font_face_set_text_to_glyphs_func(
    font_face: *mut cairo_font_face_t,
    text_to_glyphs_func: cairo_user_scaled_font_text_to_glyphs_func_t
)