1 files changed, 40 insertions, 13 deletions

diff --git a/src/3rdparty/harfbuzz-ng/src/hb-face.cc b/src/3rdparty/harfbuzz-ng/src/hb-face.cc
index 6b563bc8f1..26fddbe529 100644
--- a/src/3rdparty/harfbuzz-ng/src/hb-face.cc
+++ b/src/3rdparty/harfbuzz-ng/src/hb-face.cc
@@ -28,15 +28,11 @@
 
 #include "hb-private.hh"
 
-#include "hb-ot-layout-private.hh"
-
-#include "hb-font-private.hh"
+#include "hb-face-private.hh"
 #include "hb-open-file-private.hh"
 #include "hb-ot-head-table.hh"
 #include "hb-ot-maxp-table.hh"
 
-#include <string.h>
-
 
 /*
  * hb_face_t
@@ -47,9 +43,9 @@ const hb_face_t _hb_face_nil = {
 
   true, /* immutable */
 
-  NULL, /* reference_table_func */
-  NULL, /* user_data */
-  NULL, /* destroy */
+  nullptr, /* reference_table_func */
+  nullptr, /* user_data */
+  nullptr, /* destroy */
 
   0,    /* index */
   1000, /* upem */
@@ -61,7 +57,7 @@ const hb_face_t _hb_face_nil = {
 #undef HB_SHAPER_IMPLEMENT
   },
 
-  NULL, /* shape_plans */
+  nullptr, /* shape_plans */
 };
 
 
@@ -113,7 +109,7 @@ _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
 
   closure = (hb_face_for_data_closure_t *) calloc (1, sizeof (hb_face_for_data_closure_t));
   if (unlikely (!closure))
-    return NULL;
+    return nullptr;
 
   closure->blob = blob;
   closure->index = index;
@@ -122,8 +118,10 @@ _hb_face_for_data_closure_create (hb_blob_t *blob, unsigned int index)
 }
 
 static void
-_hb_face_for_data_closure_destroy (hb_face_for_data_closure_t *closure)
+_hb_face_for_data_closure_destroy (void *data)
 {
+  hb_face_for_data_closure_t *closure = (hb_face_for_data_closure_t *) data;
+
   hb_blob_destroy (closure->blob);
   free (closure);
 }
@@ -173,9 +171,9 @@ hb_face_create (hb_blob_t    *blob,
 
   face = hb_face_create_for_tables (_hb_face_for_data_reference_table,
 				    closure,
-				    (hb_destroy_func_t) _hb_face_for_data_closure_destroy);
+				    _hb_face_for_data_closure_destroy);
 
-  hb_face_set_index (face, index);
+  face->index = index;
 
   return face;
 }
@@ -476,4 +474,33 @@ hb_face_t::load_num_glyphs (void) const
   hb_blob_destroy (maxp_blob);
 }
 
+/**
+ * hb_face_get_table_tags:
+ * @face: a face.
+ *
+ * Retrieves table tags for a face, if possible.
+ *
+ * Return value: total number of tables, or 0 if not possible to list.
+ *
+ * Since: 1.6.0
+ **/
+unsigned int
+hb_face_get_table_tags (hb_face_t    *face,
+			unsigned int  start_offset,
+			unsigned int *table_count, /* IN/OUT */
+			hb_tag_t     *table_tags /* OUT */)
+{
+  if (face->destroy != _hb_face_for_data_closure_destroy)
+  {
+    if (table_count)
+      *table_count = 0;
+    return 0;
+  }
+
+  hb_face_for_data_closure_t *data = (hb_face_for_data_closure_t *) face->user_data;
 
+  const OT::OpenTypeFontFile &ot_file = *OT::Sanitizer<OT::OpenTypeFontFile>::lock_instance (data->blob);
+  const OT::OpenTypeFontFace &ot_face = ot_file.get_face (data->index);
+
+  return ot_face.get_table_tags (start_offset, table_count, table_tags);
+}