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3185 Commits

Author SHA1 Message Date
Behdad Esfahbod 46a863d91d [indic] Adjust pref reordering logic 
For Javanese (pref_len == 1) only reorder if it didn't ligate.  That's
sensible, and what the spec says.  For other Indic (pref_len > 1)
only reorder if ligated.

Doesn't change any test numbers.
 2013-10-27 23:28:12 +01:00
Behdad Esfahbod 6b03e3c724 Optimize fallback kerning 
Patch from Jonathan Kew.  "These changes seem to yield a small but
just-about-measurable improvement with old fonts that lack GPOS
kerning."
 2013-10-27 21:04:55 +01:00
Behdad Esfahbod 133eeba6a3 Minor 
See:
https://github.com/prezi/harfbuzz-js/pull/1/files#r7032397
 2013-10-27 00:24:59 +02:00
Behdad Esfahbod a74f0de225 [indic] Fix CM2, really 
Followup from 6e613f3365.
 2013-10-24 11:46:33 +02:00
Behdad Esfahbod 6e613f3365 Fix "shift count >= width of type" issue 2013-10-23 23:34:13 +02:00
Behdad Esfahbod ac8cd51191 Refactor 2013-10-18 19:33:09 +02:00
Behdad Esfahbod 0f3fe37fcc Comment 2013-10-18 19:14:22 +02:00
Behdad Esfahbod ddce2d8df6 [indic] Improve positioning of post-base bells and whistles 
Bug 58714 - Kannada u+0cb0 u+200d u+0ccd u+0c95 u+0cbe does not provide
same results as Windows8
https://bugs.freedesktop.org/show_bug.cgi?id=58714

Test with U+0CB0,U+200D,U+0CCD,U+0C95,U+0CBF and tunga.ttf.

Improves some scripts.  Improves Bengali too, but numbers
are up because we produce better results than Uniscribe for some
sequences now.

New numbers:
BENGALI: 353724 out of 354188 tests passed. 464 failed (0.131004%)
DEVANAGARI: 707307 out of 707394 tests passed. 87 failed (0.0122987%)
GUJARATI: 366349 out of 366457 tests passed. 108 failed (0.0294714%)
GURMUKHI: 60732 out of 60747 tests passed. 15 failed (0.0246926%)
KANNADA: 951190 out of 951913 tests passed. 723 failed (0.0759523%)
KHMER: 299070 out of 299124 tests passed. 54 failed (0.0180527%)
MALAYALAM: 1048140 out of 1048334 tests passed. 194 failed (0.0185056%)
ORIYA: 42320 out of 42329 tests passed. 9 failed (0.021262%)
SINHALA: 271662 out of 271847 tests passed. 185 failed (0.068053%)
TAMIL: 1091753 out of 1091754 tests passed. 1 failed (9.15957e-05%)
TELUGU: 970555 out of 970573 tests passed. 18 failed (0.00185457%)
 2013-10-18 18:17:29 +02:00
Behdad Esfahbod d5bd0590ae Zero marks by GDEF for Tibetan 
See:
http://lists.freedesktop.org/archives/harfbuzz/2013-April/003101.html
 2013-10-18 18:17:29 +02:00
Behdad Esfahbod bf029281b1 Bug 65258 - [...] Mongolian with free variation selector 2013-10-18 18:17:29 +02:00
Behdad Esfahbod 0193649ce4 [otfallback] Don't shift down above-marks too much 
This seems to generate much better, almost-perfect, positioning for
Arabic as well as Latin above marks.
 2013-10-18 18:17:29 +02:00
Behdad Esfahbod dba9580237 [otfallback] Never fallback-position a below-mark upwards 
Test with WinXP times.ttf and U+05D9,U+05B5.
 2013-10-18 18:17:29 +02:00
Behdad Esfahbod 8177da29ad Minor 2013-10-18 18:17:29 +02:00
Behdad Esfahbod c16012e901 [indic] Add Javanese support! 
Seems to be working just fine!
 2013-10-18 18:17:29 +02:00
Behdad Esfahbod 755b44cce6 [ft] Round metrics instead of truncate 
Lohit-Punjabi has a upem of 769!  We were losing one unit in our
code, and FreeType is losing another one...  Test with U+0A06.
Has an advance of 854 in the font.  We were producing 852.
Now we do 853, which is what FreeType is telling us.
 2013-10-18 12:03:01 +02:00
Behdad Esfahbod 9a49351cc2 [indic] Swith pref logic to use _hb_glyph_info_substituted() 
See comments from caveat!  Seems to work fine.

This is useful for Javanese which has an atomically encoded pre-base
reordering Ra which should only be reordered if it was substituted
by the pref feature.
 2013-10-18 11:25:24 +02:00
Behdad Esfahbod f175aa33c5 [indic] Fix compiler warnings 2013-10-18 11:25:24 +02:00
Behdad Esfahbod 8570273414 [otlayout] Add _hb_glyph_info_substituted() 
Currently unused.
 2013-10-18 11:25:24 +02:00
Behdad Esfahbod a1f7b28561 [otlayout] Switch over from old is_a_ligature() to IS_LIGATED 
Impact should be minimal and positive.
 2013-10-18 11:25:24 +02:00
Behdad Esfahbod 09675a8115 [otlayout] Add HB_OT_LAYOUT_GLYPH_PROPS_LIGATED 
Currently unused.
 2013-10-18 11:25:24 +02:00
Behdad Esfahbod 05ad6b50ac [otlayout] Add HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED 
Currently unused.
 2013-10-18 11:21:15 +02:00
Behdad Esfahbod 101303dbf7 [otlayout] More shuffling around 2013-10-18 11:21:15 +02:00
Behdad Esfahbod 91689de260 [otlayout] Add _hb_glyph_info_set_glyph_props() 
No functional change.
 2013-10-18 11:21:15 +02:00
Behdad Esfahbod a016174658 [otlayout] Simplify set_class() usage 2013-10-18 11:21:15 +02:00
Behdad Esfahbod 3ddf892b53 [otlayout] Renaming 2013-10-18 11:21:15 +02:00
Behdad Esfahbod 2e96d2c6ee [otlayout] More shuffling 2013-10-18 11:21:15 +02:00
Behdad Esfahbod 469524692b [otlayout] Code shuffling 2013-10-18 11:21:15 +02:00
Behdad Esfahbod 11fb16cb84 Use unsigned enums for mask types 2013-10-18 11:21:11 +02:00
Behdad Esfahbod 03058c3d1e [otlayout] Remove two unused HB_OT_LAYOUT_GLYPH_PROPS_* values 2013-10-17 20:55:34 +02:00
Behdad Esfahbod 941b699204 [otlayout] Remove unused HB_OT_LAYOUT_GLYPH_PROPS_UNCLASSIFIED 2013-10-17 20:47:33 +02:00
Behdad Esfahbod 8f9ec92dfc [indic] Adjust Javanese base algorithm 2013-10-17 19:52:47 +02:00
Behdad Esfahbod 49901862e3 [otlayout] Guard against use of ReverseChain through Context 2013-10-17 19:48:51 +02:00
Behdad Esfahbod 74f4bbf056 [indic] Towards supporting atomicly-encoded prebase-reorderings 2013-10-17 19:07:53 +02:00
Behdad Esfahbod efed40b975 [indic] Minor refactoring of reph handling 2013-10-17 18:50:11 +02:00
Behdad Esfahbod 684fe59ff8 [indic] Minor refactoring of would_substitute() 2013-10-17 18:30:06 +02:00
Behdad Esfahbod 321df83fb4 Route Buginese through the SEA shaper 
Both Indic and SEA seem to do it just fine, but SEA is much
simpler.
 2013-10-17 18:16:14 +02:00
Behdad Esfahbod b5a0f69e47 [indic] Pass zero-context=false to would_substitute for newer scripts 
For scripts without an old/new spec distinction, use zero-context=false.
This changes behavior in Sinhala / Khmer, but doesn't seem to regress.
This will be useful and used in Javanese.
 2013-10-17 18:04:23 +02:00
Behdad Esfahbod c4e71ff36d [indic] Clean up Khmer and Sinhala base finding algorithm 2013-10-17 17:04:47 +02:00
Behdad Esfahbod e10453e6fb [indic] Add BASE_POS_LAST_SINHALA 
Previously we planted this into the mode used for Khmer.  There's not
really much in common between the two, so separate again.
 2013-10-17 16:49:06 +02:00
Behdad Esfahbod 9ac6b01e0c [indic] Adjust Sinhala cluster merging under uniscribe 
Similar to 190c8f2b60 but for
Sinhala.
 2013-10-17 16:27:38 +02:00
Behdad Esfahbod 3c3df9cba1 [otlayout] Minor 2013-10-17 13:58:31 +02:00
Behdad Esfahbod 6cc136f753 [otlayout] Minor 2013-10-17 13:55:48 +02:00
Behdad Esfahbod ba6ddc421e [otlayout] Increase MAX_CONTEXT_LENGTH 
It's cheap.
 2013-10-17 13:52:51 +02:00
Behdad Esfahbod e714fe6d6a [otlayout] Simplify ligate_input() 
Shouldn't change behavior at all, but is faster / more robust.
 2013-10-17 13:49:51 +02:00
Behdad Esfahbod 6b2abdcd20 [indic] Improve clusters in presence of reph 2013-10-17 13:15:43 +02:00
Behdad Esfahbod 42d0f55cbc [indic] Apply calt,clig in the same stage as presentation features 
Whic means these twp are applied per-syllable now.  Apparently
in some Khmer fonts the clig interacts with presentation features.

Test case: U+1781,U+17D2,U+1789,U+17BB,U+17C6 with Mondulkiri-R.ttf
should produce one big ligature.
 2013-10-17 13:06:22 +02:00
Behdad Esfahbod ae9a5834df [indic] Fix pref vs blwf interaction 
If a glyph can be both blwf and pref, we were wrongly sorting it
in the post position instead of below position.
 2013-10-17 12:24:55 +02:00
Behdad Esfahbod c7dacac02c [indic] Don't apply blwf before base under old-spec mode 
Test case: U+09AC,U+09CD,U+09A6 with Lohit-Bengali 2.5.3.
 2013-10-17 12:20:46 +02:00
Behdad Esfahbod da72042c52 [otlayout] Fix up recent Context matching change 
Commit 6b65a76b40.  "end" was becoming
negative.  Was trigerred by Lohit-Kannada 2.5.3 and the sequence:
U+0CB0,U+200D,U+0CBE,U+0CB7,U+0CCD,U+0C9F,U+0CCD,U+0CB0,U+0C97,U+0CB3
Two glyphs were being duplicated.
 2013-10-17 12:02:34 +02:00
Behdad Esfahbod 1a7de1ba98 [indic] Improve Avagraha support in machine 2013-10-16 19:55:06 +02:00