Changes to the MathJax fonts

[Frédéric WANG]

Hi,

Davide mentioned a couple of times that he is going to update the
MathJax fonts.

Firefox >= 13 supports most important stretchy construction with MathJax
fonts, except those that use "scale" parameter and the important
exception of horizontal braces:

https://bugzilla.mozilla.org/show_bug.cgi?id=732832

I've looked at how to restore the old "composite char" code in Gecko
that was used in the past to stretch horizontal braces with CMEX10. I'm
now leaning towards removing all this unused code. That seems a bit
overkill to keep it, just to support the particular case of MathJax
fonts with horizontal braces. Moreover, I expect that in the future
Gecko will support Open Type Math. Modern fonts with this feature seem
to build the middle char of the brace with only one single glyph. This
includes STIX, Cambria and the self-proclaimed descendant of Computer
Modern "LM Math". So I'm wondering if we could just include the 2 glyphs
for these middle chars (or perhaps for those for other parts of the
braces too) in the MathJax fonts, so that Firefox could also stretch the
vertical braces with MathJax fonts. When I open LM Math with fontforge,
these glyphs are named uni23DE.mid and uni23DF.mid, maybe you can take
them for the MathJax fonts?

--
Fr�d�ric Wang
maths-informatique-jeux.com/blog/frederic

[Davide P. Cervone]

The horizontal brace middle is one of the character I would like to
add. There is no need to find one in another font, as I can use
FontForge to generate the single glyph from the two separate ones.
The other scaled pieces also need to be present in a better form for
making stretchy characters. The scaling is there as a hack to get
approximately what is needed given the characters present (and the
results are not optimal). The MathJax fonts need to have more of the
various pieces needed for the stretchy characters. None of this is
particularly problematic; I just need to find the time to do it.

Davide

> Frédéric Wang
> maths-informatique-jeux.com/blog/frederic
>
>

[Frédéric WANG]

Thanks, that's great! So I guess I'm going to remove the unused code
from Mozilla's source. I'll update the font data when the MathJax fonts
are updated.

[Frédéric WANG]

Davide, do you think that the changes to the MathJax fonts is something
that can happen for the next release?

On 11/08/2012 13:57, Davide P. Cervone wrote:

[Davide P. Cervone]

> Davide, do you think that the changes to the MathJax fonts is
> something that can happen for the next release?

Not this current bug-fix release that we have been working on, but the
one after that, I would expect.

Davide

>>> Frédéric Wang
>>> maths-informatique-jeux.com/blog/frederic
>>>
>>>
>>
>>
>
>
> --
> Frédéric Wang
> maths-informatique-jeux.com/blog/frederic
>
>