On 13-03-19 06:21 AM, Khaled Hosny wrote: > I was doing something like: > > script = hb_script_from_string (engine->script, -1) > language = hb_language_from_string (engine->language, -1) > hb_buffer_set_script (buffer, script) > hb_buffer_set_language (buffer, language) > > But this didn’t work for, say, ‘bng2’ script, now I understand that the > _from_string() functions take ISO tags, so now I do something like:
Right. So if you tried it with 'bng2' with that code, you were getting the generic shaper! Hence my surprise that your reporter was saying that one works but not the other... > script = hb_ot_tag_to_script (hb_tag_from_string (engine->script, -1)); > language = hb_ot_tag_to_language (hb_tag_from_string (engine->language, > -1)); > > since users of XeTeX are expected to pass OpenType script and language > tags (macro package can provide user friendly names). Now I’m not sure > if passing version 1/version 2 tags for Indic scripts really make > HaarfBuzz use them, or there is some internal magic to do the right > thing, I was about to ask :) It doesn't, since both 'beng' and 'bng2' map back to the 'Beng' script. There is no way to force HarfBuzz to use old-spec when new-spec is available. behdad > Regards, > Khaled > > On Tue, Mar 19, 2013 at 05:56:22AM -0400, Behdad Esfahbod wrote: >> BTW, how do you pass OpenType script tag to HarfBuzz?! >> >> On 13-03-18 03:15 PM, Khaled Hosny wrote: >>> The issue reported below seems to be a regression in 0.9.13, basically >>> ZWJ seems to be completely ignored, with 0.9.12 I get the desired >>> output. >>> >>> Regards, >>> Khaled >>> >>> ----- Forwarded message from Ian-Mathew Hornburg <[email protected]> >>> ----- >>> >>> From: Ian-Mathew Hornburg <[email protected]> >>> To: [email protected] >>> Subject: [XeTeX] Incorrect Bengali ZWJ behavior and v2 script spec >>> Reply-To: Unicode-based TeX for Mac OS X and other platforms <[email protected]> >>> >>> I may have identified two possible bugs in 0.9999.0: the release notes >>> indicate that the version-2 OpenType Indic script tags are now supported, >>> and I’ve been testing various Bengali-script fonts with the git version of >>> XeTeX and a current install of TeX Live 2012 to check them for correct >>> shaping behavior. I’ve posted a MWE reproducing some examples from the >>> Microsoft standard here: [http://pastebin.com/mgAX8c7U]. >>> >>> Microsoft ships two Bengali fonts (Vrinda and Shonar Bangla; both v6.80) >>> with Windows 8 that support both the older (beng) and newer (bng2) Bengali >>> script specs. (Older versions of each are shipped with Windows 7 and other >>> Microsoft products.) The fonts behave correctly when using the beng script >>> feature, with the exception of a particular ZWJ sequence: the Microsoft >>> spec [https://www.microsoft.com/typography/OpenTypeDev/bengali/intro.htm] >>> says that the sequence of consonant-hasant-ZWJ-consonant should prevent a >>> ligature of the two consonants, then render a half-form of the first >>> consonant. XeTeX currently fails to suppress the ligature. >>> >>> ----- End forwarded message ----- >>> _______________________________________________ >>> HarfBuzz mailing list >>> [email protected] >>> http://lists.freedesktop.org/mailman/listinfo/harfbuzz >>> >> >> -- >> behdad >> http://behdad.org/ > -- behdad http://behdad.org/ _______________________________________________ HarfBuzz mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/harfbuzz
