diff --git a/src/hb-ft.cc b/src/hb-ft.cc index 121b7159f..3aed71883 100644 --- a/src/hb-ft.cc +++ b/src/hb-ft.cc @@ -69,6 +69,8 @@ struct hb_ft_font_t int load_flags; bool symbol; /* Whether selected cmap is symbol cmap. */ bool unref; /* Whether to destroy ft_face when done. */ + + mutable int cached_x_scale; mutable hb_advance_cache_t advance_cache; }; @@ -86,6 +88,7 @@ _hb_ft_font_create (FT_Face ft_face, bool symbol, bool unref) ft_font->load_flags = FT_LOAD_DEFAULT | FT_LOAD_NO_HINTING; + ft_font->cached_x_scale = 0; ft_font->advance_cache.init (); return ft_font; @@ -247,6 +250,12 @@ hb_ft_get_glyph_h_advances (hb_font_t* font, void* font_data, int load_flags = ft_font->load_flags; int mult = font->x_scale < 0 ? -1 : +1; + if (font->x_scale != ft_font->cached_x_scale) + { + ft_font->advance_cache.clear (); + ft_font->cached_x_scale = font->x_scale; + } + for (unsigned int i = 0; i < count; i++) { FT_Fixed v = 0;