This also happens with Arabic Typesetting I assume? b
On 06/12/2012 06:31 AM, Khaled Hosny wrote: > I’m not sure if this is related, but I now get no mkmk positioning when > the marks are “inserted” using multiple substitution. For example, “للّٰه” > is positioned correctly, while “لله” is not though it is the same mark > glyphs except they are being added by multiple substation. > > [uni0647.fina_Lellah=4+721|uni0670=1@-267,-162|uni0651=1@-277,-440|uni0644.medi_Lellah=1+473|uni0644.init_Lellah=0+319] > > vs.: > > [uni0647.fina_Lellah=2+721|uni0670=1@-245,-440|uni0651=1@-277,-440|uni0644.medi_Lellah=1+473|uni0644.init_Lellah=0+319] > > Regards, > Khaled > > On Fri, Jun 08, 2012 at 10:14:19PM -0400, Behdad Esfahbod wrote: >> Hi Khaled and others, >> >> I fixed this, among other things, including a major mlig and mkmk regression. >> Please test. >> >> behdad >> >> On 05/12/2012 08:54 AM, Khaled Hosny wrote: >>> Hi all, >>> >>> There seems to be a difference between HarfBuzz and Uniscribe on how to >>> handle mark positioning when there is multiple glyph substitution, >>> namely HB seems to apply the mark to the last component while USP >>> applies it to the first component. >>> >>> In other words, if there is <base> → <base₁><base₂> substitution, the >>> sequence <base><mark> will be rendered as if it was <base₁><base₂><mark> >>> with HB, but as <base₁><mark><base₂> with USP. >>> >>> Using hb-shape with “uniscribe” shaper, and the word “سَتا” and Arabic >>> Typesetting font, I get >>> >>> >>> [uniFE8E=3+343|uniFE98=2+376|uni064E=0@501,-260|uni0640.curvehalf=0@,34+152|uniFEB3=0@,34+840] >>> ^^^^^^^^ >>> but with “ot” shaper, I get: >>> >>> >>> [uniFE8E=3+343|uniFE98=2+376|uni064E=0@-11,-310|uni0640.curvehalf=0@,34+152|uniFEB3=0@,34+840] >>> ^^^^^^^^ >>> though the glyph string is the same, the position of the mark is clearly >>> different. >>> >>> (background: I need this to contextually insert tatweel to avoid mark >>> collision in “crowded” places, but with the difference between both >>> engines this can’t be reliably done without breaking mark positioning in >>> one of them). >>> >>> Regards, >>> Khaled >>> _______________________________________________ >>> HarfBuzz mailing list >>> [email protected] >>> http://lists.freedesktop.org/mailman/listinfo/harfbuzz > _______________________________________________ HarfBuzz mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/harfbuzz
