On Fri, May 14, 2010 at 02:54:49PM +0200, Hans Hagen wrote: > On 14-5-2010 2:37, Khaled Hosny wrote: > >On Thu, May 13, 2010 at 11:35:58PM +0200, Hans Hagen wrote: > >>On 13-5-2010 11:26, Khaled Hosny wrote: > >>>On Thu, May 13, 2010 at 10:25:06PM +0200, Hans Hagen wrote: > >>>>On 13-5-2010 10:06, Khaled Hosny wrote: > >>>> > >>>>>Nothing special, I always expect interline space to be fixed, I don't > >>>>>know if TeX always make interline spacing variable, but this wasn't an > >>>>>issue with English text. However, with Arabic, Tashkil marks seems to > >>>>>always cause a noticeable extra whitespace above the line. > >>>>>See the uneven distribution of vertical whitespace in this example (it > >>>>>can be even worse than this in reality): > >>>> > >>>>for arabic you really need to set the interline space (idris might > >>>>have more input on this) > >>>> > >>>>- it has more height than depth > >>> > >>>Not always عٍ or فيٍ is as deep as high is أً. > >> > >>so for say 12pt arabic we should use 8pt ht and 8pt depth? > > > >I'm not sure about this, but I'd rather trust the font designer for > >knowing better about his font, and something like in the attached file > >(except it doesn't work :) see my other mail) > > it's a gray area ... if we obey the ht/dp spec of a font (ascender > and descender) we end up with an unpredictable mess (actually > comparable to setting the baselineskip to 0pt and trusting the ht/dp > of glyphs to force the right line spacing) > > in dtp there's aways this rather strict grid
At least it should be there as an option, and contrary to ht/dp of the glyphs, typo ascender/descender are font wide values thus will be the same for all lines (math is an exception). Regards, Khaled -- Khaled Hosny Arabic localiser and member of Arabeyes.org team Free font developer ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : http://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___________________________________________________________________________________
