readImage static method
Implementation
static Future<ui.Image> readImage(String fileName) async {
final ByteData data = await rootBundle.load(fileName);
final u8List = data.buffer.asUint8List();
final u8 = ImageUtils.rotate(u8List, -0);
final ui.Codec codec = await ui.instantiateImageCodec(u8);
final ui.FrameInfo fi = await codec.getNextFrame();
return fi.image;
}