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31 Commits

Author SHA1 Message Date
Behdad Esfahbod 391cc03317 [Indic] Allow halant group in Vowel and placeholder syllables 
Fixes 2 out of 560 Devanagari failures.  AND:
Fixes 1 out of 2 Tamil failures.
 2012-07-18 15:12:49 -04:00
Behdad Esfahbod ca4e3d3eab [Indic] Streamline halant/joiner in grammar 2012-07-18 15:05:40 -04:00
Behdad Esfahbod 418d00dffd [Indic] Minor 2012-07-18 14:57:28 -04:00
Behdad Esfahbod 4c3691d2a3 [Indic] Hopefully minor! 
Refactoring Indic machin.  No semantic change.
 2012-07-18 14:23:55 -04:00
Behdad Esfahbod db8981f1e0 [Indic] Position Khmer Robat 
It's a visual Repha.

Still not positioning logical Repha as occurs in Malayalam.

Another 200 Khmer failures fixed.  547 to go.  That's better than
Devanagari!
 2012-07-17 23:42:04 -04:00
Behdad Esfahbod 25bc489498 [Indic] Better categorize Register Shifters and Khmer Various signs 
Down another 500 or so Khmer failures!
 2012-07-17 17:53:03 -04:00
Behdad Esfahbod 34b5714906 [Indic] Treat Khmer Register Shifters more like Nuktas 
Except that there may be a ZWNJ before a Register Shifter.
 2012-07-17 14:09:32 -04:00
Behdad Esfahbod 11e2a601b1 [Indic] Minor 2012-07-17 14:02:28 -04:00
Behdad Esfahbod c50ed71e9a [Indic] Recategorize Khmer coeng sign as a separate category OT_Coeng 
Amend the syllable structure to allow a final subscripted consonant
(Coeng+C) and a final subscripted independent vowel (Coeng+V).
Fixes another 2k of Khmer failures.
 2012-07-17 11:54:28 -04:00
Behdad Esfahbod deb521dee4 [Indic] Add a separate Coeng class 
No characters recategorized yet.  No semantic change.
 2012-07-17 11:37:32 -04:00
Behdad Esfahbod 7d09c98a1f [Indic] Recognizer Register Shifter marks 
Fixes another 6% of the Khmer failures.
 2012-07-16 16:45:22 -04:00
Behdad Esfahbod a98d0ab186 Make sure HB_BEGIN_DECLS / HB_END_DECLS is only used in public headers 
So we can use them to switch default visibility to internal if desired,
and use these to make only declared symbols public.
 2012-07-13 10:19:10 -04:00
Behdad Esfahbod 27aba594c9 Minor 2012-05-24 15:00:01 -04:00
Behdad Esfahbod 18c06e189b [Indic] Add Uniscribe bug feature for dotted circle 
For dotted-circle independent clusters, Uniscribe does no Reph shaping
for the exact sequence Ra+Halant+25CC.  Which also is the only possible
sequence with 25CC at the end.
 2012-05-11 20:02:14 +02:00
Behdad Esfahbod 9c09928989 [Indic] Allow multiple Consonants in Vowel/NBSP syllables 
Uniscribe allows multiple Halant+Consonant after a Vowel.
Tests:
↦       * U+0905,U+094D,U+092B,U+094D,930,94d,930
 2012-05-11 18:46:35 +02:00
Behdad Esfahbod 8c0aa486f3 [Indic] Allow two Nuktas per consonant 
Uniscribe allows up to two nuktas per consonant and one per matra. It does so
indepent of whether the consonant already has a nukta in it.  Tests:

        * U+0916,U+093C,U+0941
        * U+0959,U+093C,U+0941
        * U+0916,U+093C,U+093C,U+0941
        * U+0959,U+093C,U+093C,U+0941
        * U+0916,U+093C,U+093C,U+093C,U+0941
        * U+0959,U+093C,U+093C,U+093C,U+0941
        * 915,93c,93c,,94d,U+0916,U+093C,U+093C,U+093e,93c,93c
 2012-05-11 18:13:42 +02:00
Behdad Esfahbod 3399a06e70 [Indic] Fix U+0952 and similar classification to match Uniscribe 
See comments.
 2012-05-11 17:54:26 +02:00
Behdad Esfahbod ff24d1081a [Indic] Don't use syllable serial value 0 2012-05-11 17:07:08 +02:00
Behdad Esfahbod 4be46bade2 [Indic] Fix state machine to backtrack 2012-05-11 14:39:01 +02:00
Behdad Esfahbod cee7187447 [Indic] Move syllable tracking from Indic to generic layer 
This is to incorporate it into GSUB/GPOS processing.
 2012-05-11 11:41:39 +02:00
Behdad Esfahbod 86e5dd386a [Indic] Don't give up syllable parsing upon junk 2012-05-09 18:57:37 +02:00
Behdad Esfahbod ef24cc8c8e [Indic] Towards multi-cluster syllables and final reordering 2012-05-09 18:10:20 +02:00
Behdad Esfahbod 9ceca3aeb1 Fix ragel regexp in vowel-based syllable 
As reported by datao zhang on the mailing list.
 2012-04-16 21:05:51 -04:00
Behdad Esfahbod b870afcd1b Rewrite ragel expression to better match the one on MS spec 
https://www.microsoft.com/typography/otfntdev/devanot/shaping.aspx
 2012-04-16 21:05:11 -04:00
Behdad Esfahbod d4cc44716c Move code around, in prep for Thai/Lao shaper 2012-04-07 21:52:28 -04:00
Behdad Esfahbod 461b9b6347 Fix cluster formation in Indic 
Makes number of failures against Uniscribe with hi_IN dictionary from
OO.o to go down from 6334 to 4290.  Not bad for a one-line change!

Mozilla Bug 729626 - ASAN: heap-buffer-overflow HTML
 2012-03-01 18:11:19 -08:00
Behdad Esfahbod 743807a3ce [Indic] Apply Indic features 
Find the base consonant and apply basic Indic features accordingly.
Nothing complete, but does something for now.  Specifically:
no Ra handling right now, and no ZWJ/ZWNJ.

Number of failing shape-complex tests goes from 174 down to 125.

Next: reorder matras.
 2011-07-29 16:46:09 -04:00
Behdad Esfahbod 76f76812ac Shuffle code around, remove shape_plan from complex shapers 2011-07-07 22:25:25 -04:00
Behdad Esfahbod d69d5ceaa0 [Indic] Well, at least finding syllables works now :) 
Still not much there.
 2011-07-04 12:56:38 -04:00
Behdad Esfahbod c7fe56a1d5 [Indic] Some of the basic features are global; Mark them so 2011-06-24 19:05:34 -04:00
Behdad Esfahbod 867361c3ad [indic] Add syllable recognition state machine 
Using an incredible tool called Ragel.
 2011-06-17 18:35:46 -04:00