[HarfBuzz] Library similar to HarfBuzz to shape mathematical equations?

[Khaled Hosny]

LuaTeX’s mlist.w (which is essentially the math shaper) is 3600 LOC,
that is near the size of HarfBuzz shaper, still not counting the code
dealing with math input. LOC might not be a good measure, though. Knuth
TeX math algorithm is 22 steps described in 7 pages in appendix g of The
TeXbook. There is also the input, math input needs a higher level
language, and MathML is not the only one, and this has to be taken into
account somehow.

Regards,
 Khaled

On Wed, Nov 14, 2012 at 11:27:11PM +0100, Lóránt Pintér wrote:
> How complex is the problem of math layout, say, compared to HarfBuzz? What are
> the hard parts? In other words: how big would the project have to be?
> 
> -- 
> 
> Lóránt Pintér
> 
> Developer at Prezi
> 
> On Wednesday, November 14, 2012 at 11:23 PM, Khaled Hosny wrote:
> 
>     Hi,
> 
>     I'd be interested in helping with such an effort, I already started
>     cleaning up GtkMathView (on a private fork) a while ago to prepare it
>     for OpenType math support, would there be any interest in HarfBuzz
>     providing an API to read MATH table? (I think it might help a bit with
>     porting Gecko to OpenType math that some Mozilla MathML people seem to
>     be interested in). That would be a good start, a full math engine in
>     HarfBuzz would be nice, but it might be too much I think, given the
>     complexity of math layout.
> 
>     Regards,
>     Khaled
> 
>     On Wed, Nov 14, 2012 at 11:11:08AM -0800, Behdad Esfahbod wrote:
> 
>         Hi,
> 
>         There used to be GtkMathMLView. That's not exactly what you want
>         though.
>         Maybe we should start one...
> 
>         http://helm.cs.unibo.it/mml-widget/
> 
>         behdad
> 
>         On 12-11-14 08:59 AM, Lóránt Pintér wrote:
> 
>             Hi,
> 
>             Sorry for the off-topic question, but is there maybe a library
>             similar to
>             HatfBuzz that can be used to shape/layout/format mathematical
>             formula?
> 
>             What I would like is to provide the input in TeX or MathML format,
>             and get
>             back something similar to hb_buffer_get_glyph_positions().
> 
>             --
>             Thanks,
> 
>             *Lóránt Pintér*
> 
>             Developer at Prezi <http://prezi.com>
> 
> 
> 
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> 
>         --
>         behdad
>         http://behdad.org/
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