def get_font_family_name(self, name):
try:
with current_container().open(name) as f:
f.seek(0, os.SEEK_END)
sz = f.tell()
except Exception:
sz = 0
key = name, sz
if key not in self.font_name_cache:
raw = current_container().raw_data(name, decode=False)
f = QRawFont(raw, 12)
if f.isValid():
ans = f.familyName() + ' ' + f.styleName()
else:
ans = None
self.font_name_cache[key] = ans
return self.font_name_cache[key]
