addFont method Null safety

void addFont(
  1. Future<ByteData> bytes
)

Registers a font asset to be loaded by this font loader.

The bytes argument specifies the actual font asset bytes. Currently, only OpenType (OTF) and TrueType (TTF) fonts are supported.

Implementation

void addFont(Future<ByteData> bytes) {
  if (_loaded) {
    throw StateError('FontLoader is already loaded');
  }

  _fontFutures.add(bytes.then(
      (ByteData data) => Uint8List.view(data.buffer, data.offsetInBytes, data.lengthInBytes),
  ));
}