[HarfBuzz] How to increase harfbuzz numerical precision

[Behdad Esfahbod]

You can't have both.  Pick which you like.

On Tue, Jun 28, 2016 at 6:43 PM, Kelvin Ma <kelvinsthirteen at gmail.com>
wrote:

> so that’s the only way huh…
> doesn’t that kind of defeat the purpose of hb.font_create() and having
> many scaled versions of the same font? You would only ever need one font of
> each face, scaled to the UPEM, if the fontsize was to be applied externally
> after shaping already occurred.
>
> On Tue, Jun 28, 2016 at 5:51 PM, Behdad Esfahbod <behdad at behdad.org>
> wrote:
>
>> HarfBuzz coordinates work in a int32 space.  You are free to set whatever
>> scales you want on the font.  For example, use 6 or 8 or 10 or 16 bits of
>> sub-pixel precision by multiplying your scale by a number.
>>
>> On Tue, Jun 28, 2016 at 4:57 PM, Kelvin Ma <kelvinsthirteen at gmail.com>
>> wrote:
>>
>>> It appears that harfbuzz rounds all decimals to integers when giving
>>> glyph advances and offsets. This is causing some ugly misalignment problems
>>> in arabic shaping, as well as latin cursive fonts. (see pictures)
>>>
>>> [image: Inline image 1]
>>>
>>> [image: Inline image 2]
>>>
>>> [image: Inline image 3]
>>> How do I get harfbuzz to preserve the floats?
>>>
>>> _______________________________________________
>>> HarfBuzz mailing list
>>> HarfBuzz at lists.freedesktop.org
>>> https://lists.freedesktop.org/mailman/listinfo/harfbuzz
>>>
>>>
>>
>>
>> --
>> behdad
>> http://behdad.org/
>>
>
>


-- 
behdad
http://behdad.org/
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