Roll HarfBuzz to 1.4.1

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

Index: third_party/harfbuzz-ng/src/hb-font-private.hh
diff --git a/third_party/harfbuzz-ng/src/hb-font-private.hh b/third_party/harfbuzz-ng/src/hb-font-private.hh
index cda97a68c01c4eabe46e8aeba97ebe8f987828b5..53671d78d23a6da06c235c5a1bc0a6a8ffc06fb5 100644
--- a/third_party/harfbuzz-ng/src/hb-font-private.hh
+++ b/third_party/harfbuzz-ng/src/hb-font-private.hh
@@ -108,6 +108,10 @@ struct hb_font_t {
   unsigned int x_ppem;
   unsigned int y_ppem;
 
+  /* Font variation coordinates. */
+  unsigned int num_coords;
+  int *coords;
+
   hb_font_funcs_t   *klass;
   void              *user_data;
   hb_destroy_func_t  destroy;
@@ -120,6 +124,8 @@ struct hb_font_t {
   { return HB_DIRECTION_IS_VERTICAL(direction) ? y_scale : x_scale; }
   inline hb_position_t em_scale_x (int16_t v) { return em_scale (v, x_scale); }
   inline hb_position_t em_scale_y (int16_t v) { return em_scale (v, y_scale); }
+  inline hb_position_t em_scalef_x (float v) { return em_scalef (v, this->x_scale); }
+  inline hb_position_t em_scalef_y (float v) { return em_scalef (v, this->y_scale); }
   inline hb_position_t em_scale_dir (int16_t v, hb_direction_t direction)
   { return em_scale (v, dir_scale (direction)); }
 
@@ -531,6 +537,10 @@ struct hb_font_t {
     scaled += scaled >= 0 ? upem/2 : -upem/2; /* Round. */
     return (hb_position_t) (scaled / upem);
   }
+  inline hb_position_t em_scalef (float v, int scale)
+  {
+    return (hb_position_t) (v * scale / face->get_upem ());
+  }
 };
 
 #define HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS