Update Harfbuzz to version 4.2.1

[ChangeLog][QtGui][Text] Updated the Harfbuzz code included with
Qt to version 4.2.1.

Pick-to: 6.2 6.3
Fixes: QTBUG-103603
Change-Id: I45fdde8fd0772e4470304c5f6f5a876666356d04
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>

1 files changed, 38 insertions, 29 deletions

diff --git a/src/3rdparty/harfbuzz-ng/src/hb-ot-cff2-table.hh b/src/3rdparty/harfbuzz-ng/src/hb-ot-cff2-table.hh
index 829217feaa..b77e7f53fa 100644
--- a/src/3rdparty/harfbuzz-ng/src/hb-ot-cff2-table.hh
+++ b/src/3rdparty/harfbuzz-ng/src/hb-ot-cff2-table.hh
@@ -397,7 +397,7 @@ struct cff2
   template <typename PRIVOPSET, typename PRIVDICTVAL>
   struct accelerator_templ_t
   {
-    void init (hb_face_t *face)
+    accelerator_templ_t (hb_face_t *face)
     {
       topDict.init ();
       fontDicts.init ();
@@ -412,15 +412,15 @@ struct cff2
       const OT::cff2 *cff2 = this->blob->template as<OT::cff2> ();
 
       if (cff2 == &Null (OT::cff2))
-      { fini (); return; }
+        goto fail;
 
       { /* parse top dict */
 	byte_str_t topDictStr (cff2 + cff2->topDict, cff2->topDictSize);
-	if (unlikely (!topDictStr.sanitize (&sc))) { fini (); return; }
+	if (unlikely (!topDictStr.sanitize (&sc))) goto fail;
 	cff2_top_dict_interpreter_t top_interp;
 	top_interp.env.init (topDictStr);
 	topDict.init ();
-	if (unlikely (!top_interp.interpret (topDict))) { fini (); return; }
+	if (unlikely (!top_interp.interpret (topDict))) goto fail;
       }
 
       globalSubrs = &StructAtOffset<CFF2Subrs> (cff2, cff2->topDict + cff2->topDictSize);
@@ -434,49 +434,55 @@ struct cff2
 	  (globalSubrs == &Null (CFF2Subrs)) || unlikely (!globalSubrs->sanitize (&sc)) ||
 	  (fdArray == &Null (CFF2FDArray)) || unlikely (!fdArray->sanitize (&sc)) ||
 	  (((fdSelect != &Null (CFF2FDSelect)) && unlikely (!fdSelect->sanitize (&sc, fdArray->count)))))
-      { fini (); return; }
+        goto fail;
 
       num_glyphs = charStrings->count;
       if (num_glyphs != sc.get_num_glyphs ())
-      { fini (); return; }
+        goto fail;
 
       fdCount = fdArray->count;
       if (!privateDicts.resize (fdCount))
-      { fini (); return; }
+        goto fail;
 
       /* parse font dicts and gather private dicts */
       for (unsigned int i = 0; i < fdCount; i++)
       {
 	const byte_str_t fontDictStr = (*fdArray)[i];
-	if (unlikely (!fontDictStr.sanitize (&sc))) { fini (); return; }
+	if (unlikely (!fontDictStr.sanitize (&sc))) goto fail;
 	cff2_font_dict_values_t  *font;
 	cff2_font_dict_interpreter_t font_interp;
 	font_interp.env.init (fontDictStr);
 	font = fontDicts.push ();
-	if (unlikely (font == &Crap (cff2_font_dict_values_t))) { fini (); return; }
+	if (unlikely (font == &Crap (cff2_font_dict_values_t))) goto fail;
 	font->init ();
-	if (unlikely (!font_interp.interpret (*font))) { fini (); return; }
+	if (unlikely (!font_interp.interpret (*font))) goto fail;
 
 	const byte_str_t privDictStr (StructAtOffsetOrNull<UnsizedByteStr> (cff2, font->privateDictInfo.offset), font->privateDictInfo.size);
-	if (unlikely (!privDictStr.sanitize (&sc))) { fini (); return; }
+	if (unlikely (!privDictStr.sanitize (&sc))) goto fail;
 	dict_interpreter_t<PRIVOPSET, PRIVDICTVAL, cff2_priv_dict_interp_env_t>  priv_interp;
 	priv_interp.env.init(privDictStr);
 	privateDicts[i].init ();
-	if (unlikely (!priv_interp.interpret (privateDicts[i]))) { fini (); return; }
+	if (unlikely (!priv_interp.interpret (privateDicts[i]))) goto fail;
 
 	privateDicts[i].localSubrs = &StructAtOffsetOrNull<CFF2Subrs> (&privDictStr[0], privateDicts[i].subrsOffset);
 	if (privateDicts[i].localSubrs != &Null (CFF2Subrs) &&
 	  unlikely (!privateDicts[i].localSubrs->sanitize (&sc)))
-	{ fini (); return; }
+	  goto fail;
       }
-    }
 
-    void fini ()
+
+      return;
+
+      fail:
+        _fini ();
+    }
+    ~accelerator_templ_t () { _fini (); }
+    void _fini ()
     {
       sc.end_processing ();
       topDict.fini ();
-      fontDicts.fini_deep ();
-      privateDicts.fini_deep ();
+      fontDicts.fini ();
+      privateDicts.fini ();
       hb_blob_destroy (blob);
       blob = nullptr;
     }
@@ -484,32 +490,32 @@ struct cff2
     bool is_valid () const { return blob; }
 
     protected:
-    hb_blob_t			*blob;
+    hb_blob_t			*blob = nullptr;
     hb_sanitize_context_t	sc;
 
     public:
     cff2_top_dict_values_t	topDict;
-    const CFF2Subrs		*globalSubrs;
-    const CFF2VariationStore	*varStore;
-    const CFF2CharStrings	*charStrings;
-    const CFF2FDArray		*fdArray;
-    const CFF2FDSelect		*fdSelect;
-    unsigned int		fdCount;
+    const CFF2Subrs		*globalSubrs = nullptr;
+    const CFF2VariationStore	*varStore = nullptr;
+    const CFF2CharStrings	*charStrings = nullptr;
+    const CFF2FDArray		*fdArray = nullptr;
+    const CFF2FDSelect		*fdSelect = nullptr;
+    unsigned int		fdCount = 0;
 
     hb_vector_t<cff2_font_dict_values_t>     fontDicts;
     hb_vector_t<PRIVDICTVAL>  privateDicts;
 
-    unsigned int	      num_glyphs;
+    unsigned int	      num_glyphs = 0;
   };
 
   struct accelerator_t : accelerator_templ_t<cff2_private_dict_opset_t, cff2_private_dict_values_t>
   {
+    accelerator_t (hb_face_t *face) : accelerator_templ_t (face) {}
+
     HB_INTERNAL bool get_extents (hb_font_t *font,
 				  hb_codepoint_t glyph,
 				  hb_glyph_extents_t *extents) const;
-#ifdef HB_EXPERIMENTAL_API
-    HB_INTERNAL bool get_path (hb_font_t *font, hb_codepoint_t glyph, draw_helper_t &draw_helper) const;
-#endif
+    HB_INTERNAL bool get_path (hb_font_t *font, hb_codepoint_t glyph, hb_draw_session_t &draw_session) const;
   };
 
   typedef accelerator_templ_t<cff2_private_dict_opset_subset_t, cff2_private_dict_values_subset_t> accelerator_subset_t;
@@ -525,7 +531,10 @@ struct cff2
   DEFINE_SIZE_STATIC (5);
 };
 
-struct cff2_accelerator_t : cff2::accelerator_t {};
+struct cff2_accelerator_t : cff2::accelerator_t {
+  cff2_accelerator_t (hb_face_t *face) : cff2::accelerator_t (face) {}
+};
+
 } /* namespace OT */
 
 #endif /* HB_OT_CFF2_TABLE_HH */