Roll HarfBuzz to 1.3.0

third_party/harfbuzz-ng/src/hb-font.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 140 matching lines @@
 {
   return font->parent_scale_x_distance (font->parent->get_glyph_h_advance (glyph));
 }
 
 static hb_position_t
 hb_font_get_glyph_v_advance_nil (hb_font_t *font HB_UNUSED,
                                  void *font_data HB_UNUSED,
                                  hb_codepoint_t glyph,
                                  void *user_data HB_UNUSED)
 {
+  /* TODO use font_extents.ascender+descender */
   return font->y_scale;
 }
 static hb_position_t
 hb_font_get_glyph_v_advance_parent (hb_font_t *font,
                                     void *font_data HB_UNUSED,
                                     hb_codepoint_t glyph,
                                     void *user_data HB_UNUSED)
 {
   return font->parent_scale_y_distance (font->parent->get_glyph_v_advance (glyph));
 }
@@ skipping 1486 matching lines @@
                                         trampoline_destroy);
 
   trampoline_reference (&trampoline->closure);
   hb_font_funcs_set_variation_glyph_func (ffuncs,
                                           hb_font_get_variation_glyph_trampoline,
                                           trampoline,
                                           trampoline_destroy);
 }
 
 #endif /* HB_DISABLE_DEPRECATED */