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57 Commits

Author SHA1 Message Date
Behdad Esfahbod f80c34eb55 Whitespace 2016-07-12 11:18:26 -07:00
Behdad Esfahbod 2f560ee44b [tibetan] Reorder marks to better match Uniscribe 
Fixes https://github.com/behdad/harfbuzz/issues/237

Note that Uniscribe enforces a certain syllable order.  We don't.
But with this change, I get all of the tibetan contractions pass
with Microsoft Himalaya font.
 2016-04-27 03:11:41 -07:00
Behdad Esfahbod 3e10460a1d Minor comment 2016-03-11 18:45:19 -08:00
Behdad Esfahbod aae2847099 Emoji skin tone modifiers need to be treated as combining marks 
Fixes https://github.com/behdad/harfbuzz/issues/169
 2016-02-18 17:06:25 +07:00
Behdad Esfahbod 59821ab8b4 [arabic] Don't stretch over cased letters 
Addresses
6e6f82b6f3 (commitcomment-14248516)
 2015-11-06 16:27:44 -08:00
Behdad Esfahbod 6e6f82b6f3 Implement SYRIAC ABBREVIATION MARK with 'stch' feature 
The feature is enabled for any character in the Arabic shaper.
We should experiment with using it for Arabic subtending marks.
Though, that has a directionality problem as well, since those
are used with digits...

Fixes https://github.com/behdad/harfbuzz/issues/141
 2015-11-05 17:46:34 -08:00
Behdad Esfahbod 49ef630936 Adjust the width of various spaces if font does not cover them 
See discussion here:
81ef4f407d

There's no way to disable this fallback, but I don't think it would
be needed.  Let's hope for the best!

Fixes https://github.com/behdad/harfbuzz/issues/153
 2015-11-04 17:27:07 -08:00
Behdad Esfahbod 7793aad946 Normalize various spaces to space if font doesn't support 
This resurrects the space fallback feature, after I disabled
the compatibility decomposition.  Now I can release HarfBuzz
again without breaking Pango!

It also remembers which space character it was, such that later
on we can approximate the width of this particular space
character.  That part is not implemented yet.

We normalize all GC=Zs chars except for U+1680 OGHA SPACE MARK,
which is better left alone.
 2015-11-04 15:51:41 -08:00
Behdad Esfahbod 90d75f93bb Tighten ccc-setting a bit and document it 2015-11-03 12:58:12 -08:00
Behdad Esfahbod f8160a4959 Add FLAG_SAFE() for values known to be small-enough 
And add check to FLAG()
 2015-07-21 15:50:02 +01:00
Behdad Esfahbod 164c13d73f Another try to fix Mongolian free variation selectors 
This reverts bf029281 and fixes it properly.  That commit
was not enough as it was only inheriting the shaping_action
for prev_action, but not curr_action.

Micro-test added.

https://code.google.com/p/chromium/issues/detail?id=393896
 2014-07-17 14:28:04 -04:00
Behdad Esfahbod 878a25375b Minor 2014-07-16 13:21:59 -04:00
Behdad Esfahbod 7627100f42 Mark unsigned integer literals with the u suffix 
Simplifies hb_in_range() calls as the type can be inferred.
The rest is obsessiveness, I admit.
 2014-07-11 16:22:13 -04:00
Behdad Esfahbod 577ca48143 [unicode7] Update list of Default_Ignorable codepoints 2014-06-18 12:29:23 -04:00
Behdad Esfahbod 9c9411839b [tibetan] Reorder PADMA sign to occur after other below marks 
Based on suggestion from Andrew Glass.

Test: U+0F40,0FC6,0F83
 2014-04-28 12:44:14 -07:00
Jonathan Kew 391934db0a [unicode] Exclude the Jamo Filler characters from Default_Ignorable, as some fonts want these to be visible/spacing glyphs. 2014-01-20 10:37:32 +00:00
Behdad Esfahbod 15f67048e4 Reorder Tai Tham SAKOT to ensure it comes after any tone marks 2013-12-27 19:33:28 -05:00
Behdad Esfahbod 2a8c49ade0 Remove unnecessary includes 2013-12-11 20:24:20 -05:00
Behdad Esfahbod a8bf0e91f1 Add U+061C ARABIC LETTER MARK to Default_Ignorable 2013-05-03 14:45:04 -04:00
Behdad Esfahbod cc50bf5b13 Remove Hangul filler characters from Default_Ignorable chars 
See discussion on mailing list.
 2013-03-19 07:00:41 -04:00
Behdad Esfahbod 1c8654ead4 [Myanmar] Prevent reordering between Asat and Dot below 
Implemented as a hack for now.  Myanmar failures down from 23 to 15.

MYANMAR: 1123868 out of 1123883 tests passed. 15 failed (0.00133466%)

The remaining 15 cases are all where the syllable is wrong according to
the OpenType spec.  We insert dottedcircle.  Uniscribe fails to do that,
but it also fails to reorder the prebase-reordering medial-Ra.  So it
gets it wrong.
 2013-02-11 14:28:59 -05:00
Behdad Esfahbod cf3afd8979 Rename and revamp is_zero_width() to be is_default_ignorable() 
That's really the logic desired.  Except that MONGOLIAN VOWEL SEPARATOR
is not default_ignorable but it really should be.  Reported to Unicode.

Based on suggestion from Konstantin Ritt.
 2012-10-25 16:32:54 -07:00
Behdad Esfahbod 028a1706f8 Refactor common macro 2012-09-06 14:25:48 -04:00
Behdad Esfahbod d5045a5f40 [ICU] Use new normalizer2 compose/decompose API 
It's considerably faster than the fallback implementation we had
previously!
 2012-08-11 21:27:15 -04:00
Behdad Esfahbod 56c9e7c004 Fill out combining class resetting for fallback shaping Thai/Lao/Tibetan 2012-08-09 21:14:23 -04:00
Behdad Esfahbod 21756934a1 [OT] Implement fallback positioning 
Implemented for Arabic, Hebrew, and generic marks.
Activated if no GPOS table present.
 2012-08-08 01:20:45 -04:00
Behdad Esfahbod 0f8881d6bb More refactoring 2012-08-07 16:57:02 -04:00
Behdad Esfahbod 61f41849af Add Hebrew presentation forms shaping 
Lifted from https://bugzilla.mozilla.org/show_bug.cgi?id=728866
 2012-08-07 16:45:27 -04:00
Behdad Esfahbod 6adf417bc1 Use a lookup table for modified_combining_class 2012-08-01 18:07:42 -04:00
Behdad Esfahbod 208f70f055 Inline Unicode callbacks internally 2012-08-01 17:13:10 -04:00
Behdad Esfahbod 7470315a3e Move unicode accessors around 2012-08-01 17:01:59 -04:00
Behdad Esfahbod 21fdcee001 Add hb_unicode_combining_class_t 2012-08-01 16:28:50 -04:00
Behdad Esfahbod 378d279bbf Implement Unicode compatibility decompositions 
Based on patch from Philip Withnall.
https://bugs.freedesktop.org/show_bug.cgi?id=41095
 2012-07-31 21:36:16 -04:00
Behdad Esfahbod 35bdab3cf1 Minor 2012-07-25 11:59:52 -04:00
Behdad Esfahbod 478fd0529b Minor 2012-07-24 17:09:01 -04:00
Behdad Esfahbod 8979a7f6f2 [Mongolian] Remove Mongolian Vowel Separator at the end of shaping 
Results match Uniscribe now.
 2012-07-24 17:03:55 -04:00
Behdad Esfahbod 9a5b421a64 Fix build with no Unicode funcs implementations provided 2012-07-11 18:00:28 -04:00
Behdad Esfahbod 1bc1cb3603 Make source more digestable for gobject-introspection 2012-06-16 15:21:55 -04:00
Behdad Esfahbod 6220e5fc0d Add ASSERT_POD for most objects 2012-06-06 03:30:09 -04:00
Behdad Esfahbod be4560a3b5 Undo default unicode-funcs to avoid static initializer again 2012-06-05 18:43:57 -04:00
Behdad Esfahbod f06ab8a426 Better hide nil objects and make them const 2012-06-05 14:49:14 -04:00
Behdad Esfahbod 96a9ef0c9f Remove tab character like other "zero-width" characters 
Uniscribe does that, this make comparing results to Uniscribe
easier.
 2012-06-01 13:46:26 -04:00
Behdad Esfahbod bc145658bd Warn if no Unicode functions implementation is found 2012-05-28 10:45:50 -04:00
Behdad Esfahbod d1deaa2f5b Replace zerowidth invisible chars with a zero-advance space glyph 
Like Uniscribe does.
 2012-05-09 15:04:13 +02:00
Behdad Esfahbod 6769f21d57 More moving code around 2012-04-05 16:46:46 -04:00
Behdad Esfahbod 2db2a56682 Move code around 2012-04-05 16:40:37 -04:00
Behdad Esfahbod 5ddd9cc499 Minor 2011-09-16 16:40:44 -04:00
Behdad Esfahbod c605bbbb6d Remove C++ guards from source files 
Where causing issues for people with MSVC.
 2011-08-04 20:00:53 -04:00
Behdad Esfahbod c4641723fb [API] Add compose() and decompose() unicode funcs, rename other ones 
Add compose() and decompose() unicode funcs.  These implement
pair-wise canonical composition/decomposition.

The glib/icu implementations are lacking for now.  We are adding
API for this to glib, but I cannot find any useful API in ICU.
May end of implementing these in-house.

Changed all unicode_funcs callback names to remove the "_get" part.
Eg, hb_unicode_get_script_func_t is now hb_unicode_script_func_t,
and hb_unicode_get_script() is hb_unicode_script() now.
 2011-07-08 00:09:31 -04:00
Behdad Esfahbod 891c4755ba Humm, undo some shuffling 
In preparation for adding more advanced unicode funcs.
 2011-07-07 23:27:27 -04:00