Update Harfbuzz to 7.0.1

This is the 6.4-specific update of Harfbuzz, since Harfbuzz
was currently on an older version in 6.4 compared to other
branches.

This also backports the change to the qtextlayout test that
was done on other branches for the 6.0.0 update.

Fixes: QTBUG-111535
Change-Id: Ie8217f1541a02d3800142b88cf0007be0ed0d1e2
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 13549fa7c2d27ba588471f97a640f4dbcf86b10c)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 35 insertions, 7 deletions

diff --git a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh
index 786428fe45..4529927ba6 100644
--- a/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh
+++ b/src/3rdparty/harfbuzz-ng/src/OT/Layout/GSUB/SingleSubst.hh
@@ -7,15 +7,19 @@
 
 namespace OT {
 namespace Layout {
-namespace GSUB {
+namespace GSUB_impl {
 
 struct SingleSubst
 {
   protected:
   union {
-  HBUINT16              format;         /* Format identifier */
-  SingleSubstFormat1    format1;
-  SingleSubstFormat2    format2;
+  HBUINT16				format;         /* Format identifier */
+  SingleSubstFormat1_3<SmallTypes>	format1;
+  SingleSubstFormat2_4<SmallTypes>	format2;
+#ifndef HB_NO_BEYOND_64K
+  SingleSubstFormat1_3<MediumTypes>	format3;
+  SingleSubstFormat2_4<MediumTypes>	format4;
+#endif
   } u;
 
   public:
@@ -23,11 +27,15 @@ struct SingleSubst
   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)...));
     case 2: return_trace (c->dispatch (u.format2, std::forward<Ts> (ds)...));
+#ifndef HB_NO_BEYOND_64K
+    case 3: return_trace (c->dispatch (u.format3, std::forward<Ts> (ds)...));
+    case 4: return_trace (c->dispatch (u.format4, std::forward<Ts> (ds)...));
+#endif
     default:return_trace (c->default_return_value ());
     }
   }
@@ -45,11 +53,24 @@ struct SingleSubst
     if (glyphs)
     {
       format = 1;
+      hb_codepoint_t mask = 0xFFFFu;
+
+#ifndef HB_NO_BEYOND_64K
+       if (+ glyphs
+	   | hb_map_retains_sorting (hb_first)
+	   | hb_filter ([] (hb_codepoint_t gid) { return gid > 0xFFFFu; }))
+       {
+	 format += 2;
+	 mask = 0xFFFFFFu;
+       }
+#endif
+
       auto get_delta = [=] (hb_codepoint_pair_t _)
-                       { return (unsigned) (_.second - _.first) & 0xFFFF; };
+                       { return (unsigned) (_.second - _.first) & mask; };
       delta = get_delta (*glyphs);
-      if (!hb_all (++(+glyphs), delta, get_delta)) format = 2;
+      if (!hb_all (++(+glyphs), delta, get_delta)) format += 1;
     }
+
     u.format = format;
     switch (u.format) {
     case 1: return_trace (u.format1.serialize (c,
@@ -57,6 +78,13 @@ struct SingleSubst
                                                | hb_map_retains_sorting (hb_first),
                                                delta));
     case 2: return_trace (u.format2.serialize (c, glyphs));
+#ifndef HB_NO_BEYOND_64K
+    case 3: return_trace (u.format3.serialize (c,
+                                               + glyphs
+                                               | hb_map_retains_sorting (hb_first),
+                                               delta));
+    case 4: return_trace (u.format4.serialize (c, glyphs));
+#endif
     default:return_trace (false);
     }
   }