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[arabic] Add note re disabled 'cswh'

This commit is contained in:
Behdad Esfahbod 2014-07-17 15:57:37 -04:00
parent 615d00ea25
commit 82f4d9d53f
1 changed files with 9 additions and 0 deletions
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9
src/hb-ot-shape-complex-arabic.cc
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@ -184,6 +184,15 @@ collect_features_arabic (hb_ot_shape_planner_t *plan)
map->add_global_bool_feature (HB_TAG('c','a','l','t'));
map->add_gsub_pause (NULL);
/* The spec includes 'cswh'. Earlier versions of Windows
* used to enable this by default, but testing suggests
* that Windows 8 and later do not enable it by default,
* and spec now says 'Off by default'.
* We disabled this in ae23c24c32.
* Note that IranNastaliq uses this feature extensively
* to fixup broken glyph sequences. Oh well...
* Test case: U+0643,U+0640,U+0631. */
map->add_global_bool_feature (HB_TAG('c','s','w','h'));
map->add_global_bool_feature (HB_TAG('m','s','e','t'));
}