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[ft] Invalidate advance cache if font size changed

This commit is contained in:
Behdad Esfahbod 2018-09-11 14:41:19 +02:00
parent 54998befc4
commit 383060cc33
1 changed files with 9 additions and 0 deletions
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9
src/hb-ft.cc
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@ -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;