AuroraMiddleware/harfbuzz
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Make tracking optout possible using 'trak' ot feature

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So '--features=-trak' or 'font-feature-settings: 'trak' 0;' can prevent
applying of tracking if used.
This commit is contained in:
Ebrahim Byagowi 2018-10-23 00:52:05 +03:30 committed by Behdad Esfahbod
parent 6d40eb8372
commit 22ecefd88e
2 changed files with 9 additions and 3 deletions
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10
src/hb-ot-shape.cc
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@ -116,7 +116,8 @@ hb_ot_shape_planner_t::compile (hb_ot_shape_plan_t &plan,
plan.fallback_mark_positioning = true;
/* Currently we always apply trak. */
plan.apply_trak = hb_aat_layout_has_tracking (face);
plan.apply_trak = hb_aat_layout_has_tracking (face) &&
plan.map.needs_fallback (HB_TAG ('t','r','a','k'));
}
@ -177,12 +178,15 @@ hb_ot_shape_collect_features (hb_ot_shape_planner_t *planner,
/* Random! */
map->enable_feature (HB_TAG ('r','a','n','d'), F_RANDOM, HB_OT_MAP_MAX_VALUE);
map->enable_feature (HB_TAG('H','A','R','F'));
/* Tracking. */
map->enable_feature (HB_TAG ('t','r','a','k'), F_HAS_FALLBACK);
map->enable_feature (HB_TAG ('H','A','R','F'));
if (planner->shaper->collect_features)
planner->shaper->collect_features (planner);
map->enable_feature (HB_TAG('B','U','Z','Z'));
map->enable_feature (HB_TAG ('B','U','Z','Z'));
for (unsigned int i = 0; i < ARRAY_LENGTH (common_features); i++)
map->add_feature (common_features[i]);

2
test/shaping/data/in-house/tests/aat-trak.tests
View File

@ -6,3 +6,5 @@
../fonts/TestTRAK.ttf:--font-ptem=24:U+0041,U+0042,U+0043:[A.alt=0@-12,0+976|B=1@-12,0+976|C.alt=2@-12,0+976]
../fonts/TestTRAK.ttf:--font-ptem=72:U+0041,U+0042,U+0043:[A.alt=0@-50,0+900|B=1@-50,0+900|C.alt=2@-50,0+900]
../fonts/TestTRAK.ttf:--font-ptem=144:U+0041,U+0042,U+0043:[A.alt=0@-107,0+786|B=1@-107,0+786|C.alt=2@-107,0+786]
../fonts/TestTRAK.ttf:--font-ptem=144:U+0041,U+0042,U+0043:[A.alt=0@-107,0+786|B=1@-107,0+786|C.alt=2@-107,0+786]
../fonts/TestTRAK.ttf:--font-ptem=144 --features=-trak:U+0041,U+0042,U+0043:[A.alt=0+1000|B=1+1000|C.alt=2+1000]