def get_text_height(pctx: pangocffi.Context, style: TextStyle,
resolution_scale: float):
font = FontDescription()
font.set_family(style.font)
font.set_absolute_size(to_pango_units(style.size))
ret = pangocffi.pango.pango_context_get_metrics(pctx.get_pointer(),
font.get_pointer(),
pangocffi.ffi.NULL)
descent = from_pango_units(
pangocffi.pango.pango_font_metrics_get_descent(ret))
ascent = from_pango_units(
pangocffi.pango.pango_font_metrics_get_ascent(ret))
return (ascent + descent) * resolution_scale
def test_font_description_init_identical(self):
desc = FontDescription()
identical_desc = desc.from_pointer(desc.get_pointer())
assert identical_desc == desc