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110 Commits

Author SHA1 Message Date
Behdad Esfahbod 8cdbea5580 [ot-shape-normalize] Move buffer out of hb_ot_shape_normalize_context_t 2021-08-24 10:35:33 -06:00
Behdad Esfahbod 8450f43ae1 [buffer] HB_NODISCARD next_glyph() 2021-03-15 16:01:35 -06:00
Behdad Esfahbod 34a1204f10 [buffer] HB_NODISCARD output_glyph() 
Also, generalize and use replace_glyphs() in morx where output_glyph() was used
in a loop.
 2021-03-15 16:01:35 -06:00
Behdad Esfahbod b05e5d9a79 [buffer] HB_NODISCARD next_glyphs() 2021-03-15 14:08:08 -06:00
Behdad Esfahbod 607979d12f [buffer] HB_NODISCARD replace_glyphs() 2021-03-15 13:23:48 -06:00
Behdad Esfahbod bcd10bf274 [normalize] Add buffer success check before ->next_glyph() 
Speculative fix for:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=27843
 2021-02-17 13:58:56 -07:00
Simon Cozens fd8f4ffcc6 Trace reorder, not normalize 2020-11-17 09:05:40 +00:00
David Corbett 645f4e7cdd Unhide CGJ before ccc=0 characters 
If a CGJ precedes a starter, then it cannot have blocked any reordering,
so it can safely be skipped.
 2020-09-02 15:51:15 -07:00
Evgeniy Reizner 34ed8e7218 Prefer _hb_glyph_info_is_unicode_mark where possible. 2019-12-13 08:55:34 +03:30
Ebrahim Byagowi a0b4ac4dce Turn 8 spaces to tab across the project 
According to the current code style of the project
 2019-08-27 02:40:41 +04:30
Behdad Esfahbod 7aad53657e [config] Add HB_NO_OT_SHAPE / HB_NO_OT 
Part of https://github.com/harfbuzz/harfbuzz/issues/1652
 2019-06-26 13:21:03 -07:00
Behdad Esfahbod 7f5941e162 Remove stale comment 
Ugliness was fixed in 30eab97a00
But yeah, my smell detector was working.  Ugliness was buggy.
 2018-10-27 00:06:48 -07:00
Behdad Esfahbod 30eab97a00 Fix invalid memory read 
Buffer might be relocated inside replace_glyphs().

Fixes https://bugs.chromium.org/p/chromium/issues/detail?id=895117
 2018-10-26 21:54:40 -07:00
Behdad Esfahbod 39bd07aed5 Fix bunch of unused parameter warnings 
Show up with gcc -O0.

There's a few more but those are functions that need to be filled in.

Maybe this is a lost battle...
 2018-10-26 21:22:26 -07:00
Behdad Esfahbod e883f52732 Call get_nominal_glyphs() for runs of simple clusters at a time 
Even without FT or OT font funcs implementing get_nominal_glyphs(), there's measurable
speedup.
 2018-10-09 14:50:57 -04:00
Behdad Esfahbod 8008bca83b Whitespace 2018-10-09 14:43:03 -04:00
Behdad Esfahbod 30c114ffec Avoid sort and recompose stages if all clusters simple 
Even has measurable speedup...
 2018-10-09 14:37:08 -04:00
Behdad Esfahbod 24382debe8 Rewrite main normalizer loop to isolate runs of simple clusters 2018-10-09 14:33:24 -04:00
Behdad Esfahbod b5371f18ef Inline decompose_cluster 
Towards separating the common case into its own loop.
 2018-10-09 14:12:59 -04:00
Behdad Esfahbod 1d1734e985 Shuffle code around 2018-10-02 13:04:05 +02:00
Behdad Esfahbod 7f335390f3 Revert change that would decompose text if GPOS mark feature is available 
https://github.com/harfbuzz/harfbuzz/issues/653#issuecomment-423905920
 2018-09-24 09:56:18 -04:00
Behdad Esfahbod a6f4b2f7cd Fix normalization 
62d1e0852a (commitcomment-30613091)
 2018-09-24 09:54:37 -04:00
Behdad Esfahbod 62d1e0852a Prefer decomposed form if font has GPOS mark feature 
Fixes https://github.com/harfbuzz/harfbuzz/issues/653
 2018-09-23 21:32:18 -04:00
Behdad Esfahbod c77ae40852 Rename hb-*private.hh to hb-*.hh 
Sorry for the noise, downstream custom builders.  Please adjust.
 2018-08-25 22:36:36 -07:00
Behdad Esfahbod 7185b273b3 Rename in_error to !successful 
Towards possibly using Null pool for some nil objects.
 2018-05-31 20:03:34 -07:00
Ebrahim Byagowi eaf649450a Resolve clang's conditional-uninitialize warnings 2018-04-23 11:38:45 -07:00
Behdad Esfahbod 8c0d1916a4 Improve CGJ skipping logic 
Previously we made CGJ unskippable.  Now, if CGJ did NOT prevent
any reordering, allow skipping over it.  To make this work we
had to make changes to the Arabic mark reordering algorithm
implementation to renumber moved MCM marks.  See comments.

Fixes https://github.com/harfbuzz/harfbuzz/issues/554
 2018-01-05 12:48:19 +00:00
Behdad Esfahbod ab8d70ec70 [arabic] Implement Unicode Arabic Mark Ordering Algorithm UTR#53 
Fixes https://github.com/behdad/harfbuzz/issues/509
 2017-10-04 14:47:10 +02:00
Behdad Esfahbod b6fe0ab636 Add info_cc() convenience macro 2017-10-04 13:37:08 +02:00
Behdad Esfahbod 7f9e7f8689 Adjust normalizer for out-of-order marks 
We are going to implement Unicode Arabic Mark Ordering Algorithm:

  http://www.unicode.org/reports/tr53/tr53-1.pdf

which will reorder marks out of their sorted ccc order.  Adjust
normalizer to stop combining as soon as dangerous ordering is
detected.
 2017-10-04 13:20:33 +02:00
Behdad Esfahbod 1dd630a7f2 Minor 
Fixes https://github.com/behdad/harfbuzz/issues/411
 2017-02-01 11:57:21 -08:00
Behdad Esfahbod 8b5bc141cd Add get_nominal_glyph() and get_variation_glyph() instead of get_glyph() 
New API:
- hb_font_get_nominal_glyph_func_t
- hb_font_get_variation_glyph_func_t
- hb_font_funcs_set_nominal_glyph_func()
- hb_font_funcs_set_variation_glyph_func()
- hb_font_get_nominal_glyph()
- hb_font_get_variation_glyph()

Deprecated API:
- hb_font_get_glyph_func_t
- hb_font_funcs_set_glyph_func()

Clients that implement their own font-funcs are encouraged to replace
their get_glyph() implementation with a get_nominal_glyph() and
get_variation_glyph() pair.  The variation version can assume that
variation_selector argument is not zero.
 2016-02-24 19:05:23 +09:00
Behdad Esfahbod ea512f7108 Use C-style casts instead of compare to 0, to convert hb_bool_t to bool 2015-11-26 19:22:22 -05:00
Behdad Esfahbod 766963adba Merge pull request #114 from ThePhD/vc++-fixes 
Fix all VC++ warnings and errors
 2015-11-24 15:38:43 -06:00
Behdad Esfahbod abadc1717d Try to better handle OOM situations 
Fixes assert fail in https://github.com/behdad/harfbuzz/issues/161
with libharfbuzz-fuzzing.
 2015-11-18 17:52:08 -08:00
Behdad Esfahbod 6986208ba3 Optimize runs without Default_Ignorable's 
Now that we have a buffer-wide scratch flags facility, use it to
optimize away a few passes.
 2015-11-04 18:46:41 -08:00
Behdad Esfahbod 9cbc39aef9 Minor 2015-11-04 18:00:53 -08:00
Behdad Esfahbod 52e6c4e158 If font doesn't support U+2011, fall back to U+2010 
Test passes now.
 2015-11-04 17:45:56 -08:00
Behdad Esfahbod 75483aafa6 Untangle if/else waterfall 2015-11-04 17:43:36 -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 5c8174eda3 Update comments for removal of compat decompositions 2015-10-21 18:51:40 -02:00
Behdad Esfahbod f679970040 Disable compatibility decomposition usage during normalization 
Fixes https://github.com/behdad/harfbuzz/issues/152
 2015-10-21 17:20:55 -02:00
Behdad Esfahbod 980e25cad2 Fix hb-ot-shape-normalize with empty buffer 
Part of https://github.com/behdad/harfbuzz/issues/136
 2015-10-02 08:21:12 +01:00
Behdad Esfahbod e995d33c10 [OT] Merge clusters when reordering marks for normalization 
Fixes https://bugzilla.gnome.org/show_bug.cgi?id=541608
and cluster test.
 2015-09-01 16:13:32 +01:00
Behdad Esfahbod 85846b3de7 Use insertion-sort instead of bubble-sort 
Needed for upcoming merge-clusters fix.
 2015-09-01 15:07:52 +01:00
ThePhD 5c99cf93d6 Merge branch 'master' into vc++-fixes 2015-08-14 01:02:00 -04:00
jfkthame c7dfe316f8 Don't rely on .cluster in _hb_ot_shape_normalize() 
Fixes https://github.com/behdad/harfbuzz/pull/124
 2015-08-09 18:26:27 +02:00
ThePhD 8e545d5961 Fix all VC++ warnings and errors in the current commit's builds. 2015-06-22 22:29:04 -04:00
Behdad Esfahbod 1eff435023 Minor optimization 2015-01-27 12:26:04 -08:00