1 files changed, 17 insertions, 8 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh
index b289175504..742c8587ee 100644
--- a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh
+++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/MultipleSubst.hh
@@ -6,14 +6,17 @@
 
 namespace OT {
 namespace Layout {
-namespace GSUB {
+namespace GSUB_impl {
 
 struct MultipleSubst
 {
   protected:
   union {
-  HBUINT16              format;         /* Format identifier */
-  MultipleSubstFormat1  format1;
+  HBUINT16				format;         /* Format identifier */
+  MultipleSubstFormat1_2<SmallTypes>	format1;
+#ifndef HB_NO_BEYOND_64K
+  MultipleSubstFormat1_2<MediumTypes>	format2;
+#endif
   } u;
 
   public:
@@ -21,28 +24,34 @@ struct MultipleSubst
   template <typename context_t, typename ...Ts>
   typename context_t::return_t dispatch (context_t *c, Ts&&... ds) const
   {
+    if (unlikely (!c->may_dispatch (this, &u.format))) return c->no_dispatch_return_value ();
     TRACE_DISPATCH (this, u.format);
-    if (unlikely (!c->may_dispatch (this, &u.format))) return_trace (c->no_dispatch_return_value ());
     switch (u.format) {
     case 1: return_trace (c->dispatch (u.format1, std::forward<Ts> (ds)...));
+#ifndef HB_NO_BEYOND_64K
+    case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
+#endif
     default:return_trace (c->default_return_value ());
     }
   }
 
+  template<typename Iterator,
+           hb_requires (hb_is_sorted_iterator (Iterator))>
   bool serialize (hb_serialize_context_t *c,
-                  hb_sorted_array_t<const HBGlyphID16> glyphs,
-                  hb_array_t<const unsigned int> substitute_len_list,
-                  hb_array_t<const HBGlyphID16> substitute_glyphs_list)
+		  Iterator it)
   {
     TRACE_SERIALIZE (this);
     if (unlikely (!c->extend_min (u.format))) return_trace (false);
     unsigned int format = 1;
     u.format = format;
     switch (u.format) {
-    case 1: return_trace (u.format1.serialize (c, glyphs, substitute_len_list, substitute_glyphs_list));
+    case 1: return_trace (u.format1.serialize (c, it));
     default:return_trace (false);
     }
   }
+
+  /* TODO subset() should choose format. */
+
 };