initFont method
Init fontData
from network to your application.
This operation'll read font data from cache if it exists.
Otherwise download from fontData.url
and store it to cache.
Also This operation has unnecessary initialization checker,
so call same fontData
multiple-time does not repeated.
Note: Currently only support OpenType (OTF) and TrueType (TTF) fonts.
Implementation
Future<void> initFont(NetworkFont fontData) async {
if (_initedFont.contains(fontData.family)) return;
late final Future<ByteData> fontBytes = _getFontBytesData(fontData);
final FontLoader font = FontLoader(fontData.family);
font.addFont(fontBytes);
await font.load();
_initedFont.add(fontData.family);
}