AuroraMiddleware/harfbuzz
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Author SHA1 Message Date
Behdad Esfahbod
ea579f9ccc [kerx] Fix peculiar indexing that was needed previously 
Not needed now that we use GPOS attachment for cursive kerx.
 2018-11-07 15:50:23 -05:00
Behdad Esfahbod
6ee6cd93d8 [GPOS] Only mark unsafe-to-break if kerning happened 
Fixes https://github.com/harfbuzz/harfbuzz/issues/1365
 2018-11-07 15:40:55 -05:00
Behdad Esfahbod
501a364d9b [GPOS] Add TODO item 2018-11-07 15:02:16 -05:00
Behdad Esfahbod
7a9629f2f1 [kerx] Implement CrossStream kerning for non-state-machine subtables 
Untested.
 2018-11-07 14:52:57 -05:00
Behdad Esfahbod
0eb4157011 [kerx] Disable backwards-kerning for non-state-machine tables 
That's what the spec says for Backwards flag, only applicable to
formats 1 and 4.
 2018-11-07 14:42:15 -05:00
Behdad Esfahbod
b2f687c256 [kerx] Use GPOS attachment facilities for CrossStream kerning 2018-11-07 14:38:29 -05:00
Behdad Esfahbod
e10a856eb2 [kerx] Format 2018-11-07 14:11:48 -05:00
Behdad Esfahbod
649cc3ef27 [kerx] Don't disable crossKerning if kern feature is off 2018-11-07 14:07:13 -05:00
Behdad Esfahbod
0c3b061ac2 [kern] Apply erlier, where GPOS/kerx are applied 2018-11-07 13:58:41 -05:00
Behdad Esfahbod
f4bad0086e [kerx] Implement tupleKerning for Format1 
Untested.
 2018-11-07 13:51:17 -05:00
Behdad Esfahbod
39b4ef6f18 [kerx] Better sanitize tupleKerning 2018-11-07 13:48:45 -05:00
Behdad Esfahbod
14772da06f [kern/kerx] Share KernTable, renamed to KerxTable 2018-11-07 13:40:22 -05:00
Behdad Esfahbod
c038f5be6b [fallback] Minor 2018-11-07 13:35:06 -05:00
Behdad Esfahbod
db6e658e8c [kern/kerx] More towards sharing KernTable 2018-11-07 13:33:23 -05:00
Behdad Esfahbod
89ec095979 [kern] Disable Format1 and Format3 for OT-style tables 2018-11-07 13:10:05 -05:00
Behdad Esfahbod
ab57bcae0f [kern] Minor 2018-11-07 13:04:21 -05:00
Behdad Esfahbod
30af5b4a4c [kern] Move code 2018-11-07 12:57:10 -05:00
Behdad Esfahbod
1ff300464a [kern] Massage more 2018-11-07 12:51:49 -05:00
Behdad Esfahbod
8e9f6cd0fd [kerx] More minor 2018-11-07 12:49:20 -05:00
Behdad Esfahbod
f8c3df7d4a [kern/kerx] Minor 2018-11-07 12:48:06 -05:00
Behdad Esfahbod
f5e0a63a22 [kern/kerx] Towards sharing KernTable 2018-11-07 12:32:51 -05:00
Behdad Esfahbod
330508497d [kern/kerx] Minor 2018-11-07 12:27:44 -05:00
Behdad Esfahbod
1a5ef84900 [kern/kerx] Share Format2 
This, enables Format2 for kern table, which was disabled before.
 2018-11-07 12:19:52 -05:00
Behdad Esfahbod
8faec4e334 [kerx] Towards merging Format2 2018-11-07 12:16:38 -05:00
Behdad Esfahbod
d5c0ca210f [aat] Minor 2018-11-07 12:08:44 -05:00
Behdad Esfahbod
e72e041c3c [kerx] Rename 2018-11-07 11:56:36 -05:00
Behdad Esfahbod
241ba7da51 [morx/kerx] Rename types 2018-11-07 11:51:40 -05:00
Behdad Esfahbod
c808e444da [kern/kerx] Share Format1 subtable 2018-11-07 11:47:12 -05:00
Behdad Esfahbod
a244190afa [kerx] Minor 2018-11-07 11:47:12 -05:00
Behdad Esfahbod
2a72091196 [kerx] Minor 2018-11-07 11:26:57 -05:00
Behdad Esfahbod
f5f4ca7871 [kern/kerx] Enable crossStream kerning in vertical 
CoreText doesn't, but no reason we shouldn't do.
 2018-11-07 11:21:09 -05:00
Behdad Esfahbod
d5c88af4a2 [kerx] More towards sharing Format1 2018-11-07 11:20:14 -05:00
Behdad Esfahbod
b693fd0dc6 [morx] Simplify 2018-11-07 11:10:24 -05:00
Behdad Esfahbod
ce3451dc2a [kerx] Towards sharing Format1 2018-11-07 11:02:04 -05:00
Behdad Esfahbod
e890753ebb [morx] Minor 2018-11-07 10:59:53 -05:00
Behdad Esfahbod
5b17853547 [kern/kerx] Share Format0 2018-11-07 10:45:25 -05:00
Behdad Esfahbod
c97dde5d55 [kern/kerx] Towards merge more 2018-11-07 10:39:39 -05:00
Behdad Esfahbod
540ccc38b0 [kern/kerx] More towards sharing 2018-11-07 10:33:46 -05:00
Behdad Esfahbod
d0f8f4c200 [kern] Move kern machine to hb-kern.hh 2018-11-07 10:25:25 -05:00
Behdad Esfahbod
a6acff252c [kerx] Towards sharing subtables with kern 2018-11-07 10:19:57 -05:00
Behdad Esfahbod
befac337ca [kern] Remove Override business 
Not used in any fonts.  Not well-specified when mixing kerning with
Cross-Stream positioning.
 2018-11-07 09:53:50 -05:00
Behdad Esfahbod
59e04e4231 [kern/kerx] Fix cursive joining 
Tested with Waseem TTC:

$ hb-shape Waseem.ttc جحخج
[F1Jeem_R2=3@0,180+479|M1Khah_L2_R2=2@0,682+403|M1Hah_L2_R2=1@0,1184+403|I1Jeem_L2=0@0,1184+744]
 2018-11-07 00:27:20 -05:00
Behdad Esfahbod
8d0f797139 [kern/kerx] Fix "reset" magic value 2018-11-07 00:05:10 -05:00
Behdad Esfahbod
0123976a0c [kerx] Adjust CrossStream kern to match 'kern' table 2018-11-06 21:46:14 -05:00
Behdad Esfahbod
80a33b9ac3 [kern] More tweaks 
Solves a mystery or two.  I'm fairly confident this is what CoreText does now.
 2018-11-06 21:46:14 -05:00
Behdad Esfahbod
564e8ac046 [kern] Adjust some more 
Getting closer.  So many open questions still...
 2018-11-06 21:46:14 -05:00
Behdad Esfahbod
4d003b8503 [kern] Add TODO 2018-11-06 21:46:14 -05:00
Behdad Esfahbod
9810f0b80e [kern] Minor 2018-11-06 21:46:14 -05:00
Behdad Esfahbod
9c04b60583 [kern] In Format1, adjust how kerning is done 
In a series of kerns in one action, kern all but last glyph forward,
and the last one backward.  Seems to better match what CoreText is doing.

Test cases, with GeezaPro Arabic:

$ ./hb-shape GeezaPro_10_10.ttc -u U+0631,U+0628
[u0628.beh=1+1415|u0631.reh=0@-202,0+700]

$ ./hb-shape GeezaPro_10_10.ttc -u U+0628,U+064F
[u064f.damma=0@0,-250+-250|u0628.beh=0@250,0+1665]

In a later change, I'll make kern machine avoid producing negative kerns.
 2018-11-06 21:46:14 -05:00
Behdad Esfahbod
e8c4772463 [kern] XXX Negate CrossKerning sign 
Not sure why, but seems to better match GeezaPro Arabic w CoreText.

Quite possibly I'm doing something very wrong...
 2018-11-06 21:46:14 -05:00