[HarfBuzz] Alternate/random glyphs

[Aleš Mlakar]

Hi Khaled,
I did a quick debug through that part of HarfBuzz and it seems it's doing
lookups and never gets to the random code.
Tomorrow I'll try to put something together, would a link to a screen shot
and font be sufficient for starters?

Thanks!
Ales

On Wed, Feb 12, 2020 at 7:42 PM Khaled Hosny <dr.khaled.hosny at gmail.com>
wrote:

> Depends on how the font is doing the randomization, using contextual
> lookups (most likely) or rand feature (less likely as this does not
> basically work outside of HarfBuzz and few other less common applications).
>
> We would need to see the font and specific examples with output of both to
> form any meaningful opinion.
>
> Regards,
> Khaled
>
> > On Feb 12, 2020, at 8:15 PM, Aleš Mlakar <ales.ambits at gmail.com> wrote:
> >
> > Hi Nikolay,
> > I have a font "Daft Brush" for example, and if I write "gggggggggg" I
> get 4 different glyphs "randomized", and the result is different in
> Indesign and in my own application with Harfbuzz.
> > So my question is, who is doing it wrong, Indesign or Harfbuzz, or
> neither and is actually implementation defined.
> >
> > Best,
> > Ales
> >
> > On Wed, Feb 12, 2020 at 7:01 PM Nikolay Sivov <bunglehead at gmail.com>
> wrote:
> >
> >
> > On Wed, Feb 12, 2020 at 8:58 PM Aleš Mlakar <ales.ambits at gmail.com>
> wrote:
> > Hey all,
> > I've been trying to mimic font shaping in Adobe Indesign with Harfbuzz,
> most of it works great, but when random/alternate glyphs (for the fonts
> that have multiple glyphs for the same code point) are used it's not even
> remotely similar anymore.
> >
> > Sooo my question is basically this - is there any standard for glyph
> randomization or is this application controlled?
> >
> > If you're talking about alternate forms features and the like,
> application usually controls whether feature is enabled or not. The output
> of the feature is determined by font data, and shaping logic obviously.
> It's not random, if we're talking about the same thing.
> >
> >
> > Thanks!
> >
> > Regards,
> > Ales
> >
> > _______________________________________________
> > HarfBuzz mailing list
> > HarfBuzz at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/harfbuzz
> >
> >
> > --
> > Aleš Mlakar,
> > Programmer/Consultant
> > am.bits
> > _______________________________________________
> > HarfBuzz mailing list
> > HarfBuzz at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/harfbuzz
>
>

-- 
Aleš Mlakar,
Programmer/Consultant
*am.bits*
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