Roll HarfBuzz to 1.4.6

third_party/harfbuzz-ng/src/hb-face-private.hh

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2011  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
  * Permission is hereby granted, without written agreement and without
  * license or royalty fees, to use, copy, modify, and distribute this
  * software and its documentation for any purpose, provided that the
  * above copyright notice and the following two paragraphs appear in
@@ skipping 36 matching lines @@
   hb_bool_t immutable;
 
   hb_reference_table_func_t  reference_table_func;
   void                      *user_data;
   hb_destroy_func_t          destroy;
 
   unsigned int index;                   /* Face index in a collection, zero-based. */
   mutable unsigned int upem;            /* Units-per-EM. */
   mutable unsigned int num_glyphs;      /* Number of glyphs. */
 
+  enum dirty_t {
+    NOTHING     = 0x0000,
+    INDEX       = 0x0001,
+    UPEM        = 0x0002,
+    NUM_GLYPHS  = 0x0004,
+  } dirty;
+
   struct hb_shaper_data_t shaper_data;  /* Various shaper data. */
 
   /* Various non-shaping data. */
   /* ... */
 
   /* Cache */
   struct plan_node_t {
     hb_shape_plan_t *shape_plan;
     plan_node_t *next;
   } *shape_plans;
@@ skipping 25 matching lines @@
     if (unlikely (num_glyphs == (unsigned int) -1))
       load_num_glyphs ();
     return num_glyphs;
   }
 
   private:
   HB_INTERNAL void load_upem (void) const;
   HB_INTERNAL void load_num_glyphs (void) const;
 };
 
+HB_MARK_AS_FLAG_T (hb_face_t::dirty_t);
+
 extern HB_INTERNAL const hb_face_t _hb_face_nil;
 
 #define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_PROTOTYPE(shaper, face);
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
 #undef HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS
 
 
 #endif /* HB_FACE_PRIVATE_HH */