AuroraMiddleware/harfbuzz
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Author SHA1 Message Date
David Corbett
a03f5f4dfb Replace "ISO 639" with "BCP 47" 
`hb_language_from_string` accepts not only ISO 639 but also BCP 47. Not
all ISO 639 codes are valid BCP 47 tags but the function does not accept
overlong language subtags anyway.
 2018-10-11 13:54:28 -04:00
Behdad Esfahbod
0b9d60e1a1 [aat] Apply kerx if GPOS kern was not applied 
Ned tells me this is what Apple does.
 2018-10-11 13:26:58 -04:00
Behdad Esfahbod
b59a428af0 Minor 2018-10-11 13:24:17 -04:00
Behdad Esfahbod
100e95f48e [trak] Add tests 2018-10-11 11:30:45 -04:00
Behdad Esfahbod
04f72e8990 [trak] Implement extrapolation 
This concludes trak, as well as AAT shaping support!
 2018-10-11 11:25:07 -04:00
Behdad Esfahbod
d6a12dba6d [trak] Fix, and hook up 
Works beautifully!  Test coming.
 2018-10-11 11:10:06 -04:00
Behdad Esfahbod
3d7dea6dfd [trak] Handle nSizes=0 and 1 2018-10-11 10:32:08 -04:00
Behdad Esfahbod
451f3de521 [trak] Fix counting 2018-10-11 10:30:32 -04:00
Behdad Esfahbod
a5be380cae [trak] More 2018-10-11 10:29:02 -04:00
Behdad Esfahbod
d06c4a867f [trak] Only adjust around first glyph 
Assumes graphemes only have one base glyph.
 2018-10-11 10:22:01 -04:00
Behdad Esfahbod
071a2cbcdd [trak] Clean up 2018-10-11 10:18:46 -04:00
Behdad Esfahbod
fbbd926dba [kerx] Implement Format4 action_type=1 contour-point-based attachment 
Untested.

This concludes kerx table support!
 2018-10-11 01:22:29 -04:00
Behdad Esfahbod
b6bc0d4ff6 [kerx] Implement Format4 action_type=2 coordinate-based attachment 
Untested.
 2018-10-11 01:17:57 -04:00
Behdad Esfahbod
1622ba5943 [kerx] Implement Format4 'ankr'-based mark attachment 
Tested with Kannada MN:

$ HB_OPTIONS=aat ./hb-shape Kannada\ MN.ttc -u 0CCD,0C95,0CD6
[kn_ka.vattu=0+230|kn_ai_length_mark=1@326,0+607]
 2018-10-11 01:17:33 -04:00
Behdad Esfahbod
7bb4da7d95 [aat] Wire up 'ankr' table to apply context 2018-10-11 00:52:07 -04:00
Behdad Esfahbod
28f0367aab [kerx] Flesh out Format4 
Doesn't apply actions yet.
 2018-10-11 00:46:12 -04:00
Behdad Esfahbod
947962a287 [ankr] Implement table access 2018-10-10 23:07:03 -04:00
Behdad Esfahbod
7281cb3eeb [ankr] Start fixing 2018-10-10 22:56:52 -04:00
Behdad Esfahbod
34caadc5c7 Ugh. Re-enable accidentally disabled GPOS 2018-10-10 22:17:07 -04:00
Behdad Esfahbod
f7c45bc33e [kerx] Allow granularly disabling kerning 2018-10-10 22:15:13 -04:00
Behdad Esfahbod
2b72c4b63d [kerx] Comment 2018-10-10 21:53:14 -04:00
Behdad Esfahbod
9f450f07b0 [kerx] Make Format1 work 
Tested using Kannada MN:

$ HB_OPTIONS=aat ./hb-shape Kannada\ MN.ttc -u 0C95,0CCd,C95,CCD
[kn_ka.virama=0+1299|kn_ka.vattu=0+115|_blank=0@-115,0+385]

$ HB_OPTIONS=aat ./hb-shape Kannada\ MN.ttc -u 0C95,0CCd,C95,CCD --features=-kern
[kn_ka.virama=0+1799|kn_ka.vattu=0+230|_blank=0+0]

I don't see the GPOS table in the font do the same.  ¯\_(ツ)_/¯
 2018-10-10 21:46:58 -04:00
Behdad Esfahbod
504cb68fc9 Disable mark advance zeroing as well as mark fallback positioning if doing kerx 2018-10-10 21:29:46 -04:00
Behdad Esfahbod
8496753796 [kerx] Implement Format1 
Untested.
 2018-10-10 21:18:37 -04:00
Behdad Esfahbod
c9165f5450 [kerx] More UnsizedArrayOf<> 2018-10-10 20:43:21 -04:00
Behdad Esfahbod
ca54eba484 [kerx] Fix bound-checking error introduced a couple commits past 2018-10-10 20:41:16 -04:00
Behdad Esfahbod
339036dd97 [kerx] Start fleshing out Format1 2018-10-10 20:37:22 -04:00
Behdad Esfahbod
ab1f30bd05 [kerx] Implement Format6 
Untested.  The only Apple font shipping with this format is San Francisco fonts
that use this for their kerx variation tables, which we don't support.
 2018-10-10 20:10:20 -04:00
Behdad Esfahbod
c9a2ce9e05 [kerx] Move bounds-checking to subtable length itself 2018-10-10 20:00:44 -04:00
Behdad Esfahbod
22955b23cd [kerx] Start fleshing out Format6 2018-10-10 19:58:20 -04:00
Behdad Esfahbod
f6aaad9b4f [kerx] When rejecting variable kerning, also check for tupleCount 2018-10-10 19:20:06 -04:00
Behdad Esfahbod
7ed5366d3c [kerx] No-op 
Tested that Format0 works with Kannada MN font:

$ make -j5 lib -s && HB_OPTIONS=aat ./hb-shape Kannada\ MN.ttc -u 0C95,0CC2
[kn_ka=0+1000|kn_matra_uu=0@-30,0+1345]

$ make -j5 lib -s && HB_OPTIONS=aat ./hb-shape Kannada\ MN.ttc -u 0C95,0CC2 --features=-kern
[kn_ka=0+1030|kn_matra_uu=0+1375]

Note that GPOS does the same with 'dist' feature, and applies the whole difference to the
same glyph:

$ make -j5 lib -s && ./hb-shape Kannada\ MN.ttc -u 0C95,0CC2
[kn_ka=0+970|kn_matra_uu=0+1375]

$ make -j5 lib -s && ./hb-shape Kannada\ MN.ttc -u 0C95,0CC2 --features=-dist
[kn_ka=0+1030|kn_matra_uu=0+1375]
 2018-10-10 19:12:27 -04:00
Behdad Esfahbod
7fa69e92ca Comment 2018-10-10 19:02:32 -04:00
Behdad Esfahbod
7e6e5bf614 Fix option string matching 2018-10-10 18:59:07 -04:00
Behdad Esfahbod
5d34164d98 [kern/kerx] Fix offset base 
Disable kern Format2.

Fix kerx Format2.  Manually tested this with Tamil MN font and it works:

$ HB_OPTIONS=aat ./hb-shape Tamil\ MN.ttc -u 0B94,0B95
[tgv_au=0+3435|tgc_ka=1@-75,0+1517]

 HB_OPTIONS=aat ./hb-shape Tamil\ MN.ttc -u 0B94,0B95 --features=-kern
[tgv_au=0+3510|tgc_ka=1+1592]
 2018-10-10 18:23:09 -04:00
Behdad Esfahbod
60f86d32d7 [kerx] Don't loop over kerning subtables if kerning disabled 2018-10-10 18:10:05 -04:00
Behdad Esfahbod
38a7a8a89e Allow HB_OPTIONS=aat to prefer AAT tables over OT 
Fixes https://github.com/harfbuzz/harfbuzz/issues/322
 2018-10-10 17:44:46 -04:00
Behdad Esfahbod
44f09afd5b [kerx] Skip variation subtables 2018-10-10 17:32:32 -04:00
Behdad Esfahbod
1e8fdd285f Remove HAVE_OT 
We never tested compiling without it.  Just kill it.  We always build
our own shaper.
 2018-10-10 16:32:35 -04:00
Behdad Esfahbod
7727e73756 [kerx] Actually hook up, and fix crash 2018-10-10 13:24:51 -04:00
Behdad Esfahbod
b3390990f5 Add per-subtable set-digests 
This speeds up Roboto shaping by ~10%.  I was hoping for more.
Still, good defense against lookups with many subtables.
 2018-10-10 12:13:25 -04:00
Behdad Esfahbod
e78549edfb Move apply down into subtables accel 2018-10-10 11:54:48 -04:00
Behdad Esfahbod
78c09bf213 Move subtable array into lookup accel 2018-10-10 11:50:46 -04:00
Behdad Esfahbod
97e5913d5a Move more code 2018-10-10 11:41:05 -04:00
Behdad Esfahbod
c8f2d9334c Move code 
In preparation to move add per-subtable set digests...
 2018-10-10 11:36:28 -04:00
Behdad Esfahbod
a03850a356 Fix GPOS/kern interaction 
Oops.  Was checking for kern feature in GSUB, not GPOS.
 2018-10-10 10:57:28 -04:00
Behdad Esfahbod
d1be805e78 More rewriting plan compile 
Hopefully more clear.
 2018-10-10 10:49:45 -04:00
Behdad Esfahbod
961ab46b24 More reshuffle plan compile 2018-10-10 10:42:10 -04:00
Behdad Esfahbod
2091b509e3 [kerx] Hook up to shaper 2018-10-10 10:41:08 -04:00
Behdad Esfahbod
8d00c39bfc [kern] Minor 2018-10-10 10:19:07 -04:00