>> The modern applications trying to support the CJK vertical writing
>> mode use more complicated frameworks, like HarfBuzz.
>
> Too many times I see questions on this list from people trying to do
> complicated font rendering directly in FreeType, when they should be
> using higher-level rendering/shaping engines like Cairo, HarfBuzz
> and Fribidi. They should be saving themselves some work.
Can you suggest or provide a documentation fix for the web page that
guides people into the right direction?
Werner