Re: [NTG-context] font trickery

On 5/15/2013 6:41 PM, Khaled Hosny wrote:

On Wed, May 15, 2013 at 08:51:28AM -0600, Idris Samawi Hamid ادريس سماوي حامد wrote:

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Hi Georg,

On Wed, 15 May 2013 00:09:22 -0600, Georg Duffner wrote:

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I’d prefer to stay with the AFF syntax which is well established.

I wonder if the latest, virtually frozen FontForge supports the current AFF syntax or still uses an earlier version. Before AFF was complete George added the missing functionality but Adobe did not accept his additions. The former luatex support was probably based on George's modifications to the AFF syntax.

Hans and Taco know better, but I suppose a newer implementation of AFF in mkiv could be done in lua without touching the binary.

Right, the version of FontForge included in LuaTeX uses the old syntax, FontForge has dropped it for the new Adobe syntax for few years now, but it didn’t make its way into LuaTeX.

Regards, Khaled

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But anyway, this may very well be beyond Hans' current plans for font trickery, but it's fun to discuss possibilities.

I think there is already some (not documented way) to achieve the same effect in pure Lua code (Hans uses it to implement tlig and the likes).

indeed. however the biggest challenge in patching a font runtime is where to inject the patches in the look up sequence ... Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------