Roll HarfBuzz to 1.4.6

third_party/harfbuzz-ng/src/hb-face.cc

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2012  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 33 matching lines @@
   true, /* immutable */
 
   NULL, /* reference_table_func */
   NULL, /* user_data */
   NULL, /* destroy */
 
   0,    /* index */
   1000, /* upem */
   0,    /* num_glyphs */
 
+  hb_face_t::NOTHING, /* dirty */
+
   {
 #define HB_SHAPER_IMPLEMENT(shaper) HB_SHAPER_DATA_INVALID,
 #include "hb-shaper-list.hh"
 #undef HB_SHAPER_IMPLEMENT
   },
 
   NULL, /* shape_plans */
 };
 
 
@@ skipping 100 matching lines @@
 
   hb_face_for_data_closure_t *closure = _hb_face_for_data_closure_create (OT::Sanitizer<OT::OpenTypeFontFile>::sanitize (hb_blob_reference (blob)), index);
 
   if (unlikely (!closure))
     return hb_face_get_empty ();
 
   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_set_index (face, index);
+  face->index = index;
 
   return face;
 }
 
 /**
  * hb_face_get_empty:
  *
  * 
  *
  * Return value: (transfer full)
@@ skipping 173 matching lines @@
  *
  * Since: 0.9.2
  **/
 void
 hb_face_set_index (hb_face_t    *face,
                    unsigned int  index)
 {
   if (face->immutable)
     return;
 
+  if (face->index == index)
+    return;
+
+  face->dirty |= face->INDEX;
+
   face->index = index;
 }
 
 /**
  * hb_face_get_index:
  * @face: a face.
  *
  * 
  *
  * Return value: 
@@ skipping 15 matching lines @@
  *
  * Since: 0.9.2
  **/
 void
 hb_face_set_upem (hb_face_t    *face,
                   unsigned int  upem)
 {
   if (face->immutable)
     return;
 
+  if (face->upem == upem)
+    return;
+
+  face->dirty |= face->UPEM;
+
   face->upem = upem;
 }
 
 /**
  * hb_face_get_upem:
  * @face: a face.
  *
  * 
  *
  * Return value: 
@@ skipping 24 matching lines @@
  *
  * Since: 0.9.7
  **/
 void
 hb_face_set_glyph_count (hb_face_t    *face,
                          unsigned int  glyph_count)
 {
   if (face->immutable)
     return;
 
+  if (face->num_glyphs == glyph_count)
+    return;
+
+  face->dirty |= face->NUM_GLYPHS;
+
   face->num_glyphs = glyph_count;
 }
 
 /**
  * hb_face_get_glyph_count:
  * @face: a face.
  *
  * 
  *
  * Return value: 
  *
  * Since: 0.9.7
  **/
 unsigned int
 hb_face_get_glyph_count (hb_face_t *face)
 {
   return face->get_num_glyphs ();
 }
 
 void
 hb_face_t::load_num_glyphs (void) const
 {
   hb_blob_t *maxp_blob = OT::Sanitizer<OT::maxp>::sanitize (reference_table (HB_OT_TAG_maxp));
   const OT::maxp *maxp_table = OT::Sanitizer<OT::maxp>::lock_instance (maxp_blob);
   num_glyphs = maxp_table->get_num_glyphs ();
   hb_blob_destroy (maxp_blob);
 }