Roll harfbuzz-ng to 0.9.40

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

 /*
  * Copyright © 2009  Red Hat, Inc.
  * Copyright © 2009  Keith Stribley
  *
  *  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 100 matching lines @@
                            hb_codepoint_t glyph,
                            void *user_data HB_UNUSED)
 {
   FT_Face ft_face = (FT_Face) font_data;
   int load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING | FT_LOAD_VERTICAL_LAYOUT;
   FT_Fixed v;
 
   if (unlikely (FT_Get_Advance (ft_face, glyph, load_flags, &v)))
     return 0;
 
+  if (font->y_scale < 0)
+    v = -v;
+
   /* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
    * have a Y growing upward.  Hence the extra negation. */
   return (-v + (1<<9)) >> 10;
 }
 
 static hb_bool_t
 hb_ft_get_glyph_h_origin (hb_font_t *font HB_UNUSED,
                           void *font_data HB_UNUSED,
                           hb_codepoint_t glyph HB_UNUSED,
                           hb_position_t *x HB_UNUSED,
@@ skipping 16 matching lines @@
   int load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING;
 
   if (unlikely (FT_Load_Glyph (ft_face, glyph, load_flags)))
     return false;
 
   /* Note: FreeType's vertical metrics grows downward while other FreeType coordinates
    * have a Y growing upward.  Hence the extra negation. */
   *x = ft_face->glyph->metrics.horiBearingX -   ft_face->glyph->metrics.vertBearingX;
   *y = ft_face->glyph->metrics.horiBearingY - (-ft_face->glyph->metrics.vertBearingY);
 
+  if (font->x_scale < 0)
+    *x = -*x;
+  if (font->y_scale < 0)
+    *y = -*y;
+
   return true;
 }
 
 static hb_position_t
 hb_ft_get_glyph_h_kerning (hb_font_t *font,
                            void *font_data,
                            hb_codepoint_t left_glyph,
                            hb_codepoint_t right_glyph,
                            void *user_data HB_UNUSED)
 {
@@ skipping 391 matching lines @@
 
 FT_Face
 hb_ft_font_get_face (hb_font_t *font)
 {
   if (font->destroy == (hb_destroy_func_t) FT_Done_Face ||
       font->destroy == (hb_destroy_func_t) _do_nothing)
     return (FT_Face) font->user_data;
 
   return NULL;
 }