[ot-shape] Enable dist feature by default (#1908)

Fixes https://github.com/harfbuzz/harfbuzz/issues/1907

src/hb-ot-shape-complex-indic.cc

@@ -135,7 +135,6 @@ indic_features[] =
    * Positioning features.
    * We don't care about the types.
    */
-  {HB_TAG('d','i','s','t'), F_GLOBAL},
   {HB_TAG('a','b','v','m'), F_GLOBAL},
   {HB_TAG('b','l','w','m'), F_GLOBAL},
 };
@@ -163,7 +162,6 @@ enum {
   _INDIC_PSTS,
   _INDIC_HALN,
 
-  _INDIC_DIST,
   _INDIC_ABVM,
   _INDIC_BLWM,
 

src/hb-ot-shape-complex-khmer.cc

@@ -60,7 +60,6 @@ khmer_features[] =
    * Positioning features.
    * We don't care about the types.
    */
-  {HB_TAG('d','i','s','t'), F_GLOBAL},
   {HB_TAG('a','b','v','m'), F_GLOBAL},
   {HB_TAG('b','l','w','m'), F_GLOBAL},
 };
@@ -80,7 +79,6 @@ enum {
   _KHMER_BLWS,
   _KHMER_PSTS,
 
-  _KHMER_DIST,
   _KHMER_ABVM,
   _KHMER_BLWM,
 

src/hb-ot-shape-complex-myanmar.cc

@@ -66,7 +66,6 @@ myanmar_positioning_features[] =
    * Positioning features.
    * We don't care about the types.
    */
-  HB_TAG('d','i','s','t'),
   /* Pre-release version of Windows 8 Myanmar font had abvm,blwm
    * features.  The released Windows 8 version of the font (as well
    * as the released spec) used 'mark' instead.  The Windows 8

src/hb-ot-shape-complex-use.cc

@@ -95,7 +95,6 @@ use_positioning_features[] =
    * Positioning features.
    * We don't care about the types.
    */
-  HB_TAG('d','i','s','t'),
   HB_TAG('a','b','v','m'),
   HB_TAG('b','l','w','m'),
 };

src/hb-ot-shape.cc

@@ -300,6 +300,7 @@ horizontal_features[] =
   {HB_TAG('c','l','i','g'), F_GLOBAL},
   {HB_TAG('c','u','r','s'), F_GLOBAL},
   {HB_TAG('k','e','r','n'), F_GLOBAL_HAS_FALLBACK},
+  {HB_TAG('d','i','s','t'), F_GLOBAL},
   {HB_TAG('l','i','g','a'), F_GLOBAL},
   {HB_TAG('r','c','l','t'), F_GLOBAL},
 };

test/shaping/data/in-house/Makefile.sources

@@ -14,6 +14,7 @@ TESTS = \
 	tests/context-matching.tests \
 	tests/cursive-positioning.tests \
 	tests/default-ignorables.tests \
+	tests/dist.tests \
 	tests/emoji.tests \
 	tests/fallback-positioning.tests \
 	tests/hangul-jamo.tests \

test/shaping/data/in-house/tests/dist.tests

@@ -0,0 +1 @@
+../fonts/53a91c20e33a596f2be17fb68b382d6b7eb85d5c.ttf::U+0041,U+0056:[A=0+625|V=1+675]