[XeTeX] Nastaliq [was: The future of XeTeX]

[Zdenek Wagner]

2012/8/2 Keith J. Schultz <keithjschultz at web.de>:
> Hi Again,
>
> I am now trying to grock LuaTeX otfload, that is ContTexts font loading system.
> >From what I have understood so far in order get things started is a GDEF-feature
> and GPOS Lookup support in the font.loader and font-otf.lua.
>
> Do you know off hand, if these features are already implemented in Contexts
> or just not available in LuaTeX?
>
> Sorry, to everybody else I will this is getting OT(this is a XeTeX-List) and I will take this off list,
> if Arthur does not mind.
>
It would be better to ask in the ConTeXt list, you certainly find
experts there. I am not sure whether LuaTeX/ConTeXt experts read this
list. As my Hindi example shows, the basic GSUB and GPOS tables are
most probably honoured for each script but I do not know the details.

> reagrds
>         Keith.
>
> Am 02.08.2012 um 04:40 schrieb Adam Twardoch (List) <list.adam at twardoch.com>:
>
>> Nastaliq OpenType fonts typically use the GPOS LookupType 3 (cursive attachment), which is not supported by some of the more simple-minded OpenType Layout engines.
>>
>> A.
>>
>> Sent from my mobile phone.
>>
>> On 02.08.2012, at 04:28, Mike Maxwell <maxwell at umiacs.umd.edu> wrote:
>>
>>> On 8/1/2012 6:48 PM, Khaled Hosny wrote:
>>>> I remember specifically testing some Nastaliq fonts and Hans fixing some
>>>> small issues I found, I just tested again now and IranNastaliq seems to
>>>> work (my fork of Nafees Nastaleeq is broken though, but it uses an
>>>> OpenType GDEF feature not supported by LuaTeX's font loader, so this is
>>>> expected and not even Arabic specific).
>>>
>>> I'm interested in this.  We have used Nafees Nastaleeq v1.2 (IIRC), and plan to use it for Punjabi written in Shahmukhi.  While this font works reasonably well in XeTeX, there were a couple things we were bothered by.  But it's been awhile since we last used it, and we're not experts in this style of Arabic script, so I can't remember the problems, nor would I be confident enough to say much about them anyway.
>>>
>>> Have you written up your work on Nastaliq?
>>> --
>>>   Mike Maxwell
>>>   maxwell at umiacs.umd.edu
>>>   "My definition of an interesting universe is
>>>   one that has the capacity to study itself."
>>>       --Stephen Eastmond
>>>
>>>
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-- 
Zdeněk Wagner
http://hroch486.icpf.cas.cz/wagner/
http://icebearsoft.euweb.cz