[HarfBuzz] HarfBuzz API design

[Behdad Esfahbod]

On 08/19/2009 03:16 PM, Ed Trager wrote:
> Hi, everyone,
>
>>
>> I don't have much to say about the actual font-related parts of the
>> proposal. But I do think it's perhaps a bad idea to reuse the same
>> buffer for text input and glyph output. Is memory that tight? Might a
>> user not want to be able to query the text back out even after
>> shaping?
>>
>
> I was wondering about this too : When selecting or highlighting shaped
> text (to copy/paste/do something else to it) surely a shaper like
> HarfBuzz needs to provide convenient access / mapping back to the
> underlying Unicode text ?

A shaper just converts text to glyphs, giving back the cluster mapping too. 
The rest is done by the client.  The client sure has the text somewhere 
already.  there's no point in keeping a separate copy by HarfBuzz.

behdad

> - Ed