Roll HarfBuzz to 1.1.3

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

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2009  Keith Stribley
  * Copyright © 2015  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
@@ skipping 348 matching lines @@
     /* Check whether the given name was actually the name of glyph 0. */
     char buf[128];
     if (!FT_Get_Glyph_Name(ft_face, 0, buf, sizeof (buf)) &&
         len < 0 ? !strcmp (buf, name) : !strncmp (buf, name, len))
       return true;
   }
 
   return *glyph != 0;
 }
 
+static hb_bool_t
+hb_ft_get_font_h_extents (hb_font_t *font HB_UNUSED,
+                          void *font_data,
+                          hb_font_extents_t *metrics,
+                          void *user_data HB_UNUSED)
+{
+  const hb_ft_font_t *ft_font = (const hb_ft_font_t *) font_data;
+  FT_Face ft_face = ft_font->ft_face;
+  metrics->ascender = ft_face->size->metrics.ascender;
+  metrics->descender = ft_face->size->metrics.descender;
+  metrics->line_gap = ft_face->size->metrics.height - (ft_face->size->metrics.ascender - ft_face->size->metrics.descender);
+  if (font->y_scale < 0)
+  {
+    metrics->ascender = -metrics->ascender;
+    metrics->descender = -metrics->descender;
+    metrics->line_gap = -metrics->line_gap;
+  }
+  return true;
+}
 
 static hb_font_funcs_t *static_ft_funcs = NULL;
 
 #ifdef HB_USE_ATEXIT
 static
 void free_static_ft_funcs (void)
 {
   hb_font_funcs_destroy (static_ft_funcs);
 }
 #endif
 
 static void
 _hb_ft_font_set_funcs (hb_font_t *font, FT_Face ft_face, bool unref)
 {
 retry:
   hb_font_funcs_t *funcs = (hb_font_funcs_t *) hb_atomic_ptr_get (&static_ft_funcs);
 
   if (unlikely (!funcs))
   {
     funcs = hb_font_funcs_create ();
 
+    hb_font_funcs_set_font_h_extents_func (funcs, hb_ft_get_font_h_extents, NULL, NULL);
+    //hb_font_funcs_set_font_v_extents_func (funcs, hb_ft_get_font_v_extents, NULL, NULL);
     hb_font_funcs_set_glyph_func (funcs, hb_ft_get_glyph, NULL, NULL);
     hb_font_funcs_set_glyph_h_advance_func (funcs, hb_ft_get_glyph_h_advance, NULL, NULL);
     hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ft_get_glyph_v_advance, NULL, NULL);
     //hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ft_get_glyph_h_origin, NULL, NULL);
     hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ft_get_glyph_v_origin, NULL, NULL);
     hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ft_get_glyph_h_kerning, NULL, NULL);
     //hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ft_get_glyph_v_kerning, NULL, NULL);
     hb_font_funcs_set_glyph_extents_func (funcs, hb_ft_get_glyph_extents, NULL, NULL);
     hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ft_get_glyph_contour_point, NULL, NULL);
     hb_font_funcs_set_glyph_name_func (funcs, hb_ft_get_glyph_name, NULL, NULL);
@@ skipping 257 matching lines @@
                           0, font->y_scale < 0 ? -1 : +1};
     FT_Set_Transform (ft_face, &matrix, NULL);
   }
 
   ft_face->generic.data = blob;
   ft_face->generic.finalizer = (FT_Generic_Finalizer) _release_blob;
 
   _hb_ft_font_set_funcs (font, ft_face, true);
   hb_ft_font_set_load_flags (font, FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING);
 }