Commit Graph

72 Commits

Author SHA1 Message Date
Behdad Esfahbod c61be03d6d [OT] A bit more serialize 2012-09-01 21:49:44 -04:00
Behdad Esfahbod abcc5ac1fd [OT] Improve serialize syntax
For some definition of improvement...
2012-09-01 21:30:17 -04:00
Behdad Esfahbod bc5be24014 [OT] Restart work on serialize() 2012-09-01 21:25:20 -04:00
Behdad Esfahbod 5e399a8a45 Minor 2012-08-29 10:40:49 -04:00
Behdad Esfahbod a177d027d1 [GSUB] Move ligation logic over 2012-08-28 23:18:22 -04:00
Behdad Esfahbod 191fa885d9 [GSUB] Merge Ligature and context input matching
Looks better now...
2012-08-28 22:58:55 -04:00
Behdad Esfahbod 93814ca7dc Start converging Ligature and match_input 2012-08-28 22:39:10 -04:00
Behdad Esfahbod 7c8e844d92 Use namespace for OpenType tables
Avoids USHORT, SHORT, ULONG, LONG clashes with Windows API.
2012-08-28 17:57:49 -04:00
Behdad Esfahbod 472f229a63 [GSUB] Generalize would_apply()
Fixes logic also, where before we were always matching if glyphs_len==1
and a ligature started with the glyph.
2012-08-07 22:25:24 -04:00
Behdad Esfahbod afbcc24be0 [GSUB] Wire the font, not just the face, down to substitute()
We need the font for glyph lookup during GSUB pauses in Indic shaper.
Could perhaps be avoided, but at this point, we don't mean to support
separate substitute()/position() entry points (anymore), so there is
no point in not providing the font to GSUB.
2012-08-02 08:36:40 -04:00
Behdad Esfahbod 22148b8c4a Use Coverage digests in would_apply 2012-08-02 03:51:51 -04:00
Behdad Esfahbod 6c459c8fef Minor 2012-08-02 03:45:53 -04:00
Behdad Esfahbod 0120ce9679 [GSUB/GPOS] Remove unused get_coverage() methods 2012-08-01 21:56:35 -04:00
Behdad Esfahbod 1336ecdf8e [GSUB/GPOS] Use Coverage digests as gatekeeper
Gives me a good 10% speedup for the Devanagari test case.  Less so
for less lookup-intensive tests.

For the Devanagari test case, the false positive rate of the GSUB digest
is 4%.
2012-08-01 21:46:36 -04:00
Behdad Esfahbod a878c58a8f [GSUB/GPOS] Add add_coverage() 2012-08-01 21:46:19 -04:00
Behdad Esfahbod 03b09214c0 [GSUB] Minor 2012-07-31 22:43:58 -04:00
Behdad Esfahbod c2e42c3db6 Minor 2012-07-30 19:54:50 -04:00
Behdad Esfahbod 03f67bc012 More refactoring glyph class access 2012-07-30 19:47:53 -04:00
Behdad Esfahbod 05bd1b6342 [GSUB/GPOS] Move glyph props matching around 2012-07-30 19:30:01 -04:00
Behdad Esfahbod 7fbbf86efe [GSUB] Minor 2012-07-30 18:36:42 -04:00
Behdad Esfahbod 6cdfd14bb1 Fix build on Mac 2012-07-30 17:22:17 -04:00
Behdad Esfahbod a973b5ce86 [GSUB] Further adjustments to mark-attachment vs ligation interaction
The d1d69ec52e change broke Kannada badly,
since it was ligating consonants, pushing matra out, and then ligating
with the matra.  Adjust for that.  See comments.
2012-07-30 01:47:46 -04:00
Behdad Esfahbod d1d69ec52e [GSUB] Don't ligate glyphs attached to different components of ligatures
This concludes the mark-attachment vs ligating interaction fixes (for now).
2012-07-30 00:51:47 -04:00
Behdad Esfahbod f24bcfbed1 Minor 2012-07-30 00:39:00 -04:00
Behdad Esfahbod fe20c0f84f [GSUB] Fix mark component stuff when ligatures form ligatures!
See comments.

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=437633
2012-07-30 00:00:59 -04:00
Behdad Esfahbod 2ec3ba46a3 [GSUB/GPOS] Minor
Start squeezing more out of lig_id/lig_comp.
2012-07-29 22:16:15 -04:00
Behdad Esfahbod cb3d340631 [GSUB] Don't set new lig_id on mark ligatures
If two marks form a ligature, retain their previous lig_id, such that
the mark ligature can attach to ligature components...

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=676343

In fact, I noticed that we should not let ligatures form between glyphs
coming from different components of a previous ligature.  For example,
if the sequence is: LAM,SHADDA,LAM,FATHA,HEH, the LAM,LAM,HEH form a
ligature, putting SHADDA and FATHA next to eachother.  However, it would
be wrong to ligate them.  Uniscribe has this bug also.
2012-07-29 20:37:38 -04:00
Behdad Esfahbod 338fe662b5 [GSUB] Minor 2012-07-28 18:53:01 -04:00
Behdad Esfahbod e6f7479fe3 [GSUB] Simplify would-apply 2012-07-28 18:34:58 -04:00
Behdad Esfahbod dadede012e Minor 2012-07-28 18:13:09 -04:00
Behdad Esfahbod 0b99429ead [GSUB/GPOS] Add get_coverage() and use it to speed up main loop
And use it to speed up the hotspot by checking coverage directly in
the main loop, not 10 functions deep in.

Gives me a solid 20% boost with Indic test suite.  Less so for less
lookup-intensive scenarios.

Remove the "fast_path" hack from before.
2012-07-28 17:46:35 -04:00
Behdad Esfahbod ea278d3895 Partially switch ot shaper to shape_plan 2012-07-27 02:12:28 -04:00
Behdad Esfahbod ec8d249469 Make data members of various OpenType structs protected instead of private
Should fix warnings generated when building with -Wunused-private-field.
Based on patch from Jonathan Kew.
2012-07-24 15:40:37 -04:00
Behdad Esfahbod 74d1d88781 [GSUB] Fix would_apply() for LigatureSubst 2012-07-19 16:14:23 -04:00
Behdad Esfahbod e72b360ac6 Refactor / finish would_apply() operation
Untested.
2012-07-19 14:44:46 -04:00
Behdad Esfahbod 1feb8345a5 [GSUB] Allow 1-to-1 ligature substitutions!
Apparently Uniscribe allows these, and they are used in some Khmer fonts
shipped with Windows, namely, Daun Penh.
2012-07-16 13:23:40 -04:00
Behdad Esfahbod 6d08c7f1b3 Revert "Towards templatizing common Lookup types"
This reverts commit 727135f3a9.

This is work-in-progress.  Didn't mean to push it out just yet.
2012-07-11 18:01:27 -04:00
Behdad Esfahbod 727135f3a9 Towards templatizing common Lookup types 2012-07-11 18:00:28 -04:00
Behdad Esfahbod f211d5c291 More Oops! Fix fast-path with sub-type==0 2012-06-09 03:11:22 -04:00
Behdad Esfahbod b1de6aa1f3 Oops! 2012-06-09 03:07:59 -04:00
Behdad Esfahbod faf0f20253 Add sanitize() logic for fast-paths 2012-06-09 03:02:36 -04:00
Behdad Esfahbod 993c51915f Add fast-path to GSUB to check coverage
Shaves a good 10% off DejaVu Sans with simple Latin text for me.
Now, DejaVu is very ChainContext-intensive, but it's also a very
popular font!
2012-06-09 02:48:16 -04:00
Behdad Esfahbod 4952f0aa5b Minor 2012-06-09 01:43:20 -04:00
Behdad Esfahbod ec57e0c565 Set lig_comp for MultipleSubst components
To be used for correct mark attachment to first component of a
MultipleSubst output.  That's what Uniscribe does.
2012-06-08 21:47:23 -04:00
Behdad Esfahbod 3ec77d6ae0 Don't use replace_glyphs_be for MultipleSubst 2012-06-08 21:44:06 -04:00
Behdad Esfahbod 4b7192125f Minor 2012-06-08 21:41:46 -04:00
Behdad Esfahbod 28ce5fa454 Merge clusters when ligating 2012-06-08 20:17:06 -04:00
Behdad Esfahbod 2bb1761ccb Minor, use next_glyph() 2012-06-08 19:29:44 -04:00
Behdad Esfahbod 2a3d911fe0 Fix alignment-requirement missmatch
Detected by clang and lots of cmdline options.
2012-06-07 17:31:46 -04:00
Behdad Esfahbod ed2f1363a3 Fix substitution glyph class propagation
The old code was doing nothing.

Still got to find an example font+string that makes this matter, but
need this for fixing synthetic GDEF anyway.
2012-05-22 22:12:22 -04:00