Commit Graph

36 Commits

Author SHA1 Message Date
Behdad Esfahbod 71fd5e80ad [Indic] Further adjust base algorithm for Sinhala
Apparently if there is C,V,ZWJ,C, the first C will be base, but if
it's C,ZWJ,V,C, the second one will be.

Note that Uniscribe implements this differently, by breaking syllable in
the case of C,ZWJ,V,C and putting the first consonant in one syllable
and the rest in the next syllable.

Sinhala failures down from 208 to 158 (0.0581209%).  No changes to
Khmer.
2012-07-24 00:21:16 -04:00
Behdad Esfahbod 73d71cc527 [Indic] End Vowel-based syllable at ZWJ
One Devanagari test regressed, plus 10 Malayalam (at 1545 now).

Fixed 120 Sinhala failures.  Now at 208 (0.0765136%).
2012-07-24 00:09:12 -04:00
Behdad Esfahbod 34c215036f [Indic] Improve Sinhala base algorithm and reph positioning
Sinhala does not have half forms.  And most (all?) consonants can be
base, except when preceded by ZWJ, which would request a subjoined form.
Hence switch the base algorithm to categorize with Khmer, start search
at start, and stop at a ZWJ.

Also, mark all pos=base consonants after base to be subjoined.  Mark
base itself to have pos=base.

Finally, adjust Sinhala's reph position to after-main.

Brings down Sinhala failures from 455 to 328 (0.120656%).
2012-07-23 23:51:29 -04:00
Behdad Esfahbod 771a8f5028 [Indic] exclude ligatures when matching on Indic category
If, say, a H,ZWJ,C ligature was formed, we don't want the code to detec
that as a Halant.  So, ignore ligatures when matching category in
final_reordering.

Sinhala failures down from 514 to 455 (0.167374%).
2012-07-23 20:09:30 -04:00
Behdad Esfahbod 60554f14d8 [Indic] Merge in Malayalam tests
From:
http://silpa.org.in/pub/tests/hb/ml/ml-harfbuzz-testdata.txt
2012-07-22 23:23:56 -04:00
Behdad Esfahbod 5c7081770c [Indic] Add extensive Sinhala tests
Generated by:
http://git.savannah.gnu.org/cgit/sinhala.git/plain/utils/gen-unicode-sinhala.py
2012-07-22 23:20:27 -04:00
Behdad Esfahbod 2efe4707b1 [Indic] Add Sinhala tests
Merge tests from:
http://git.savannah.gnu.org/cgit/sinhala.git/plain/patches/icu-sinhala-rendering.txt
2012-07-22 23:17:59 -04:00
Behdad Esfahbod 3d4c111b7a Add a test case 2012-07-20 19:34:39 -04:00
Behdad Esfahbod bdd080431a [Indic] Reposition Oriya Candrabindu
Oriya failures down from 0.65% to 0.20%.
2012-07-20 16:03:09 -04:00
Behdad Esfahbod 87cd63266e [Indic] Recategorize some Kannada right matras
Kannada failures down from 3.5% to 2.93%.
2012-07-19 21:25:46 -04:00
Behdad Esfahbod c87bcddb10 [Indic] Add failing test for Kannada 2012-07-19 20:03:25 -04:00
Behdad Esfahbod 422ecd2d3c [Indic] Accept a forced Rakar sequence at the end of syllable
In Sinhala, Rakar is formed by Al-Lakuna,ZWJ,Ra.  If you put that at the
end of a Consonant,Matra syllable, you get a dotted-circle from
Uniscribe.  Apparently adding a ZWJ before the Al-Lakuna "fixes" that.
And people have been encoding that sequence...  So, allow a forced
"ZWJ,Virama,ZWJ,Ra" sequence at the of syllables.

Fixes some 100 or more of Sinhala failures.  Now at 622 only (0.23%).
2012-07-18 23:25:58 -04:00
Behdad Esfahbod 10cdc94eee [Indic] In final reordering, find base, even if it disappeared
POS_BASE can disappear if base ligated backward.  Define base as last
with position not after base.

Fixes a few hundred of Sinhala failures with Iskoola Pota.
2012-07-18 17:43:23 -04:00
Behdad Esfahbod 3285e107c9 [Indic] Implement Sinhala "Al Lakuna" Reph behavior
In Sinhala, Reph is formed only explicitly, by the presence of a ZWJ.
2012-07-18 17:22:14 -04:00
Behdad Esfahbod 69f26bf39c [Indic] Fix Matra reordering when base is at end of syllable
For example: U+915,U+200c,U+93f

Fixes last Tamil failure!
2012-07-18 15:47:51 -04:00
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 418d00dffd [Indic] Minor 2012-07-18 14:57:28 -04:00
Behdad Esfahbod 74ccc6a132 [Indic] Move Halant with after-base consonants
Normally, we attach the Halant to the previous character and move it
with it.  For after-base consonants however, the Halant "belongs" to the
consonant after, so attach it so.

This fixes Bengali sequences involving post-base consonant Ya, which
should ligate with the Halant to form Ya Phala, but previously a
reordered matras was blocking the ligation.
2012-07-17 11:16:19 -04:00
Behdad Esfahbod d5c4edcdd6 [Indic] Apply presentation-forms features all at once
Seems like this is what Uniscribe is doing, and does not break any fonts
we tested (with Devanagari, Malayalam, Khmer, and Bengali), while fixing
some Ra Phala sequences for Bengali with Vrinda.  Fixes another 2% of
Bengali failures (a couple more to go).
2012-07-17 10:40:59 -04:00
Behdad Esfahbod aa116582e6 Minor 2012-07-11 18:00:28 -04:00
Behdad Esfahbod b0a6e58bb3 s/script-punjabi/script-gurmukhi/ 2012-06-04 10:21:22 -04:00
Behdad Esfahbod 4efdffec09 Minor Malayalam test case
From https://bugs.freedesktop.org/show_bug.cgi?id=45166
2012-05-28 10:45:50 -04:00
Behdad Esfahbod a3273e30bb [Indic] Add more Malayalam tests 2012-05-12 13:34:18 +02:00
Behdad Esfahbod 5b16de97bc [Indic] Add tests for dottedcircle 2012-05-11 19:55:42 +02:00
Behdad Esfahbod c071b99f15 [Indic] Add test for Left Matra with Halant
Uniscribe doesn't move the Halant, we do.  And do a broken job of it now.
2012-05-11 16:22:46 +02:00
Behdad Esfahbod b20c9ebaf5 [Indic] Add test for matra group
The spec says: "[{M}+[N]+[H]]", and that's what Uniscribe implements.
We instead do: "{M+[N]+[H]}", which means we allow Nukta and Halant
after all Matras, not just the last one.  It makes more sense.
2012-05-10 18:31:17 +02:00
Behdad Esfahbod 61a58e26a5 [Indic] Add tricky reordering test cases
In the case of Consonant,LeftMatra,Halant, Uniscribe leaves the Halant
where it is, but we want to move it with the Matra as that makes more
logical sense.
2012-05-10 14:43:53 +02:00
Behdad Esfahbod 3943293a99 [Indic] Add joiner test cases for Devanagari 2012-05-09 15:27:56 +02:00
Behdad Esfahbod a93e238e05 More tests 2012-05-08 18:55:29 +02:00
Behdad Esfahbod 585b107cde Add test caes for a minority language using Bengali
U+0985 BENGALI LETTER A followed by U+09D7 BENGALI AU LENGTH MARK.
According to Bobby de Vos on the mailing list, this results in a dotted
circle with most shaping engines, but is a legitimate sequence in this
minority language.

We reached the consensus on the list to NOT implement dotted-circle
in HarfBuzz.
2012-04-24 16:00:50 -04:00
Behdad Esfahbod 1a5a91dc0d Add a few more tests 2012-01-22 19:58:23 -05:00
Behdad Esfahbod ec3f506682 Add Devanagari test from Tom Hacohen 2012-01-22 19:10:55 -05:00
Behdad Esfahbod 820e0ed318 Add Punjabi tests from test-shape-complex also 2012-01-20 20:51:52 -05:00
Behdad Esfahbod a7d71c1057 Add Tamil test data from Muguntharaj Subramanian 2012-01-20 20:50:09 -05:00
Behdad Esfahbod 5992a9941e Import test data from late test-shape-complex 2012-01-20 20:48:14 -05:00
Behdad Esfahbod d4bffbc55b Move 2012-01-20 17:16:35 -05:00