Based on the script, base gravity, and hint, returns actual gravity
to use in laying out a single #PangoItem.
If @base_gravity is %PANGO_GRAVITY_AUTO, it is first replaced with the
preferred gravity of @script. To get the preferred gravity of a script,
pass %PANGO_GRAVITY_AUTO and %PANGO_GRAVITY_HINT_STRONG in.
Based on the script, base gravity, and hint, returns actual gravity to use in laying out a single #PangoItem.
If @base_gravity is %PANGO_GRAVITY_AUTO, it is first replaced with the preferred gravity of @script. To get the preferred gravity of a script, pass %PANGO_GRAVITY_AUTO and %PANGO_GRAVITY_HINT_STRONG in.