flame/examples/lib/stories/sprites/base64.dart

import 'package:flame/components.dart';
import 'package:flame/game.dart';

class Base64SpriteGame extends FlameGame {
  @override
  Future<void> onLoad() async {
    await super.onLoad();
    const exampleUrl =
        'data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAAxElEQVQ4jYWTMQ7DIAxFIeoNuAGK1K1ISL0DMwOHzNC5p6iUPeoNOEM7GZnPJ/EUbP7Lx7KtIfH91B/L++gs5m5M9NreTN/dEZiVghatwbXvY68UlksyPjprRaxFGAJZg+uAuSSzzC7rEDirDYAz2wg0RjWRFa/EUwdnQnQ37QFe1Odjrw04AKTTaBXPAlx8dDaXdNk4rMsc0B7ge/UcYLTZxoFizxCQ/L0DMAhaX4Mzj/uzW6phu3AvtHUUU4BAWJ6t8x9N/HHcruXjwQAAAABJRU5ErkJggg==';
    final image = await images.fromBase64('shield.png', exampleUrl);
    add(
      SpriteComponent.fromImage(
        image,
        position: Vector2.all(100),
        size: Vector2.all(100),
      ),
    );
  }
}