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3386 Commits

Author SHA1 Message Date
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 ff16ef3379 Enable building a bounded version of the library for fuzzing 
test/fuzzing/hb-fuzzer links against libharfbuzz-fuzzing.so now.
 2015-11-18 16:27:32 -08:00
Behdad Esfahbod e0082ae60d Move things around 2015-11-17 18:42:13 -08:00
Chun-wei Fan 167c327177 Fix build on MSVC >= 2012 
Use the DEFINE_ENUM_FLAG_OPERATORS macro in winnt.h on Visual Studio,
which defines the bitwise operators for the enumerations that we want to
mark as hb_mark_as_flags_t, which will take care of the situation on newer
Visual Studio (>= 2012), where the build breaks with C2057 errors as the
underlying types of the enumerations is not clear to the compiler when we
do a bitwise op within the declaration of the enumerations themselves.

Also disable the C4200 (nonstandard extension used : zero-sized array in
struct/union) and C4800 ('type' : forcing value to bool 'true' or 'false'
(performance warning)) warnings as the C4200 is the intended scenario and
C4800 is harmless but is so far an unavoidable side effect of using
DEFINE_ENUM_FLAG_OPERATORS.
 2015-11-17 12:19:22 +08:00
Chun-wei Fan 4d27bb8746 hb-ot-shape-complex-arabic.cc: Fix build on Visual Studio 
Visual Studio does not like declaring a enum variable within a for
statement, so fix the build by declaring the enum before doing the for
loop.
 2015-11-16 23:04:36 +08:00
Behdad Esfahbod d5f0d7c9fb Merge pull request #167 from KonstantinRitt/unicode_cp_opt 
Micro optimizations to UTF-16 and UTF-32 codecs
 2015-11-07 07:50:58 -08:00
Behdad Esfahbod 04ff23e73d [arabic] Improve stretch length calculation 
Err on the side of being too short, than too wide.  Reduces chance
of overlaps with neighboring glyphs.
 2015-11-06 16:29:44 -08:00
Behdad Esfahbod 59821ab8b4 [arabic] Don't stretch over cased letters 
Addresses
6e6f82b6f3 (commitcomment-14248516)
 2015-11-06 16:27:44 -08:00
Behdad Esfahbod 5337db29af Revert "Don't process lookups if buffer is in error" 
This reverts commit f92bd86cc8.

We don't want to be like cairo, where as soon as there's an error,
nothing works anymore.  So, lets process lookups as long as there's
no new memory needed.  That's also a model that hides fewer bugs.
 2015-11-06 16:18:09 -08:00
Konstantin Ritt 529a933128 Micro optimization to hb_utf16_t and hb_utf32_t ::prev() 
Implement reverse lookup instead of re-using next()
 2015-11-07 02:00:04 +04:00
Konstantin Ritt 44ae9be7a2 Nano optimization to hb_utf16_t and hb_utf32_t ::next() 2015-11-07 01:58:38 +04:00
Behdad Esfahbod f1c4adbcd3 Fix typo 2015-11-06 09:46:05 -08:00
Behdad Esfahbod 68b507a3c3 Make sure we make progress in OOM situations 2015-11-06 00:09:26 -08:00
Behdad Esfahbod f0599db761 Fix hang in OOM situations 
Fixes https://github.com/behdad/harfbuzz/issues/161
 2015-11-05 23:55:51 -08:00
Behdad Esfahbod f92bd86cc8 Don't process lookups if buffer is in error 2015-11-05 23:52:29 -08:00
Behdad Esfahbod 4301703bdd Limit buffer max size growth 
https://github.com/behdad/harfbuzz/issues/161
 2015-11-05 23:44:59 -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 c743ec5886 [ft] Fix extents with negative scales 
Fixes https://github.com/behdad/harfbuzz/issues/162
 2015-11-05 17:38:27 -08:00
Behdad Esfahbod 73fec3992a Reserve a few scratch-flags bits for complex shapers 2015-11-05 15:22:18 -08:00
Behdad Esfahbod 136863371c Add new shaper method postprocess_glyphs() 
Unused currently.  To be used for Syriac stretch implementation.

https://github.com/behdad/harfbuzz/issues/141
 2015-11-05 13:24:15 -08:00
Behdad Esfahbod e95eb23a4e Don't try zeroing marks by GDEF if there are no non-ASCII 
This one is a hack, but should be ok.
 2015-11-04 22:59:28 -08:00
Behdad Esfahbod 7fa54ed75a Don't try zeroing mark attachments by Unicode if there's no non-ASCII 2015-11-04 22:59:24 -08:00
Behdad Esfahbod 550bd14d2b Actually commit changes for previous commit 2015-11-04 22:58:58 -08:00
Behdad Esfahbod ff31b3c1b8 Skip GPOS cursive / attachment adjustmnent if none happened 
I'm starting to really like how free these new scratch_flags are.
 2015-11-04 22:47:30 -08:00
Behdad Esfahbod 0f407325f6 Minor 2015-11-04 22:28:44 -08:00
Behdad Esfahbod 497a6c2071 Skip forming clusters if text is all ASCII 2015-11-04 22:24:19 -08:00
Behdad Esfahbod 28de104f15 Move variable-sized struct member to end 
Hopefully makes clang build happy
 2015-11-04 22:03:09 -08:00
Behdad Esfahbod 5bc28b5f68 Optimize positioning for when h_origin is nil 2015-11-04 21:53:16 -08:00
Behdad Esfahbod 762770c964 Add font->has_...() to check for individual nil font funcs 
Hopefully this wouldn't break any compiler.  There was some magic
moments to getting this to compile...
 2015-11-04 21:49:19 -08:00
Behdad Esfahbod 88e9a9bcae Minor reshaping of hb_font_funcs_t implementation 
In anticipation of further changes.  No functional changes.
 2015-11-04 21:16:26 -08:00
Behdad Esfahbod a6a7715bac Comments 2015-11-04 20:51:21 -08:00
Behdad Esfahbod 6c48ec830f [ot] Remove font funcs that do nothing 2015-11-04 20:47:42 -08:00
Behdad Esfahbod 75ea2daa1d [ot] Port ot font funcs to allocated object 2015-11-04 20:43:59 -08:00
Behdad Esfahbod 44f8275080 [ft] Remove font funcs that do nothing 2015-11-04 20:43:43 -08:00
Behdad Esfahbod 7918c261ef [ft] Port ft font funcs to allocated object 2015-11-04 20:37:49 -08:00
Behdad Esfahbod da29b43794 Separate nil font-funcs from parent-peeking font-funcs 
API change: all fonts created with hb_font_create() now inherit from
(ie have parent) hb_font_get_empty().
 2015-11-04 20:22:44 -08:00
Behdad Esfahbod bee901b38e Optimize positioning direction calculations 
It makes the binary smaller AND faster.  Yumm!
 2015-11-04 19:28:17 -08:00
Behdad Esfahbod e3e4bb011a Don't do fractions if buffer is ASCII-only 2015-11-04 18:58:02 -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 14c2de3218 Limit max edits during sanitize to 8 
Used to be 100.  If a tabe needs more than one or two edits, it's
probably completely bogus...

Might help with speeding up fuzzing for
https://github.com/behdad/harfbuzz/issues/157
 2015-11-04 18:00:57 -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 aa7044de0c Generalize flags types 2015-11-04 16:25:57 -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 8565839480 Protect against possible invalid-memory access after OOM 2015-11-04 14:46:52 -08:00
Behdad Esfahbod 4cc80bed25 Fix typo! 
Ouch!  Fortunately that function was unused.
 2015-11-04 14:46:10 -08:00
Behdad Esfahbod 9ac4b9656d Add Unicode space category 
Unused so far.
 2015-11-04 14:19:25 -08:00
Behdad Esfahbod 8249ec3f86 Make top-byte of unicode_props available to be used differently per-GC 2015-11-04 13:26:17 -08:00
Behdad Esfahbod cc5d3a3388 Towards using top-byte of unicode-props for more things 2015-11-04 13:22:33 -08:00
Behdad Esfahbod 2f38dde5a1 Add _hb_glyph_info_is_unicode_mark() 
Unused right now.
 2015-11-04 13:17:33 -08:00
Behdad Esfahbod 90d75f93bb Tighten ccc-setting a bit and document it 2015-11-03 12:58:12 -08:00
Behdad Esfahbod df698f3299 [ot-font] Fix hmtx table length checking, *again* 
Exactly the same problem that I fixed in
63ef0b41dc

I rewrote the table checking yesterday in
67f8821fb2
and introduced the exact same issue again. :(
Good thing we have ongoing fuzzing going now.  Was discovered
immediately by libFuzzer.  Thanks kcc!

https://github.com/behdad/harfbuzz/issues/139#issuecomment-153449473
Fixes https://github.com/behdad/harfbuzz/issues/156
 2015-11-03 12:15:12 -08:00
Behdad Esfahbod ed2024ef93 [perf] Micro-optimize 2015-11-02 18:03:38 -08:00
Behdad Esfahbod 76a5310a83 Remove irrelevant comment 
I tried moving the is_default_ignorable() function to an INTERNAL
function.  That made the binary size grow by 5k AND things got a
tad bit slower!
 2015-11-02 17:52:45 -08:00
Behdad Esfahbod 8259669fbd Minor 2015-11-02 17:44:05 -08:00
Behdad Esfahbod 9382c471ea Combine unicode_props0/1 into a uint16 
Slightly faster.  In prep for more changes.
 2015-11-02 17:36:51 -08:00
Behdad Esfahbod 7127718545 [perf] Only call combining_class() for marks 
Saves some time.  Also preparing for reusing the ccc byte for other stuff.
 2015-11-02 17:27:48 -08:00
Behdad Esfahbod 5ba450407b Make max context-length and max nesting level configurable 
...at compile time.
 2015-11-02 15:43:39 -08:00
Behdad Esfahbod 67f8821fb2 [ot] Make bad-hmtx handling match FreeType 
Also route fuzzing-related tests through hb-ot-font, to reduce dependency
on FreeType behavior for badly-broken fonts.  Fixes failing test with
FreeType master.
 2015-11-02 15:37:29 -08:00
Behdad Esfahbod 672ca3b4e6 Use templates for making sure expression is constant 2015-10-26 14:05:05 -07:00
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 ce889189c1 Fix two more -Wshadow warnings 
https://bugzilla.mozilla.org/show_bug.cgi?id=1215894
 2015-10-21 11:23:12 -02:00
Behdad Esfahbod 4a6b1eedbb Fix one more -Wshadow warning 
https://bugzilla.mozilla.org/show_bug.cgi?id=1215894
 2015-10-21 11:20:55 -02:00
Behdad Esfahbod 6f932bc8f9 Fix a few more -Wshadow-local warnings 
https://bugzilla.mozilla.org/show_bug.cgi?id=1215894
 2015-10-21 11:16:49 -02:00
Behdad Esfahbod b90cb366d7 Fix one -Wshadow-compatible-local warning 
From https://bugzilla.mozilla.org/show_bug.cgi?id=1215894
 2015-10-21 11:13:21 -02:00
Behdad Esfahbod 50e5750bd8 Avoid unnecessary cast to 64-bit 
Fixes https://github.com/behdad/harfbuzz/issues/146

Or I think it should.
 2015-10-21 11:10:40 -02:00
Behdad Esfahbod 305d2fbf5a Add HB_FALLTHROUGH 
Borrowed from https://bugzilla.mozilla.org/show_bug.cgi?id=1215411
 2015-10-21 11:04:28 -02:00
Ebrahim Byagowi f35b3e931d Add a prototype of DirectWrite as a shaping backend 2015-10-20 22:20:47 +03:30
Behdad Esfahbod ca97ea7aa2 [ft] Revert change-of-behavior of hb_ft_font_create() introduced in 1.0.5 
The default FreeType load flags where changed from FT_LOAD_NO_HINTING
to FT_LOAD_DEFAULT in 2a9627c564.
This is crashing HarfBuzz-enabled FreeType as I suppose it causes
infinite recursion between HB and FT autohinter...

Revert the behavior change.

Fixes https://github.com/behdad/harfbuzz/issues/143
 2015-10-15 20:20:22 -03:00
Behdad Esfahbod 63ef0b41dc [ot-font] Fix hmtx wrong table length check 
Discovered by libFuzzer.  Ouch!

https://github.com/behdad/harfbuzz/issues/139#issuecomment-148289957
 2015-10-15 12:54:28 -03:00
Behdad Esfahbod 613e630617 Reduce max nesting level from 8 to 6 
We probably should implement better system to catch cyclic lookups.
But for now, this speeds up worst case behavior with broken fonts
considerably without compromising legitimate usecases.

https://github.com/behdad/harfbuzz/issues/139#issuecomment-147788447
 2015-10-13 23:33:28 -03:00
Behdad Esfahbod ed13e2ce50 [ot-font] Fix leak 
https://github.com/behdad/harfbuzz/issues/139#issuecomment-147616887
 2015-10-13 10:32:56 -03:00
Behdad Esfahbod f966649747 Fix another memory access issue discovered by libFuzzer 
Fixes https://github.com/behdad/harfbuzz/issues/139#issuecomment-146984679
 2015-10-13 00:30:50 -04:00
Behdad Esfahbod cc6ea308d4 Extern "C" custom-allocator declerations 2015-10-12 17:21:52 -04:00
Behdad Esfahbod 50f489a0a0 Typo 2015-10-11 20:59:29 -04:00
Behdad Esfahbod ee9b0b6cb5 Fix another sanitize bug 
Also discovered by "libFuzzer".
 2015-10-09 14:23:15 -04:00
Behdad Esfahbod f396fbb000 Fix return value of sanitize when subformat is not readable 
This is a fix on top of the previous issue fixed in
c917965b9e.

This was caught by "libFuzzer" testing.
 2015-10-09 12:25:55 -04:00
Behdad Esfahbod 77a1a2bc18 Add hb_dispatch_context_t 2015-10-09 12:20:58 -04:00
Behdad Esfahbod 3e905e396b Add hb_font_set_parent() 
No reason to not have it.  Makes life easier later.
We (hb-ft, hb-ot-font, etc) can use this API to inject new
parent into a font...
 2015-10-08 12:51:02 -04:00
Behdad Esfahbod edeb3dabf4 [ft] Add version for new API 2015-10-08 12:47:15 -04:00
Behdad Esfahbod 2a9627c564 [ft] API: Add hb_font_[sg]et_load_flags() API 
This changes the default load_flags of fonts created using
hb_ft_font_create() from NO_HINTING to DEFAULT.  Hope that doesn't
break too much client code.

Code calling hb_ft_font_set_funcs() is unaffected.
 2015-10-07 17:39:37 -04:00
Behdad Esfahbod 3224a594dc Minor 2015-10-07 17:33:02 -04:00
Behdad Esfahbod 52b418555b Allow compiling with custom allocators 
User can define hb_malloc_impl, etc, to name of custom allocator functions
that have the same signature as malloc.
 2015-10-03 13:20:55 +01:00
Behdad Esfahbod 88da7bba9f Default font scale to face upem 
Makes for a better default and avoids nasty inheritance issues.
See mailing list thread "Default hb_font_t scale".
 2015-10-02 14:38:20 +01:00
Behdad Esfahbod 1866e17114 Make hb_font_create_sub_font() NOT make parent immutable 
We don't rely on that.  However, whenever hb_font_make_immutable()
is called, it makes its parenting chain immutable.
 2015-10-02 14:21:29 +01:00
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 a5efaac4ff Replace a couple of malloc()s with calloc() 2015-10-02 08:02:29 +01:00
Behdad Esfahbod 26ba4d1e1f Fix segfault with empty buffer in hb_shape_plan_execute() 
Move the empty-buffer check from hb_shape_full() to hb_shape_plan_execute().

Reported by Simon Cozens.
 2015-10-02 07:25:52 +01:00
Behdad Esfahbod b47159011c Define return_trace() 
Not functional change (expected!).
 2015-09-29 14:57:02 +01:00
Behdad Esfahbod c917965b9e Add missing returns 
Fixes possible invalid read of two bytes.

Reported by Behzad Najjarpour Jabbari, Secunia Research.
 2015-09-29 14:45:35 +01:00
Behdad Esfahbod f3159ba514 Micro-optimize hb_language_from_string() 
As measured / improved by Benson Limketkai.
 2015-09-29 14:34:56 +01:00
Sascha Brawer f2ad935e19 Handle language tags that indicate phonetic IPA transcription 
The BCP-47 registry defines a variant subtag "fonipa" that can be used
in combination with arbitrary other language tags. For example,
"rm-CH-fonipa-sursilv" indicates the Sursilvan dialect of Romansh
as used in Switzerland, transcribed used the International Phonetic
Alphabet.

http://www.iana.org/assignments/language-subtag-registry/language-subtag-registry
 2015-09-29 14:32:06 +01:00
Behdad Esfahbod b8811429b6 Fix Since tags 
Fixes https://github.com/behdad/harfbuzz/issues/103
 2015-09-03 15:53:22 +04:30
Behdad Esfahbod 5d74ff02ab Fix Since: version tags on font and face APIs 
A while back we marked every API as version:1.0.  We should fix them all
to reflect real version they were introduced.  This is a start.

Patch from Nikolay Sivov.
 2015-09-03 14:55:59 +04:30
Behdad Esfahbod 5828c45d7a [indic] Add comments to merge_clusters calls 2015-09-01 16:34:12 +01:00
Behdad Esfahbod bdc8215949 [thai] Respect cluster-level > 0 2015-09-01 16:24:54 +01:00
Behdad Esfahbod 5b31fe383e [use] Merge /before/ reordering 2015-09-01 16:24:34 +01:00