fromGdxPacker static method

Future<SpriteBatch> fromGdxPacker(String path, { bool flippable = false, Paint? flipPaint, })

Implementation

static Future<SpriteBatch> fromGdxPacker(String path,
    {bool flippable = false, Paint? flipPaint}) async {
  Rect getRect(String data) {
    final split = data.split(',');
    return Rect.fromLTWH(
      double.parse(split[0]),
      double.parse(split[1]),
      double.parse(split[2]),
      double.parse(split[3]),
    );
  }

  final atlas = await rootBundle.loadString(path);

  final textures = <String, Rect>{};
  final framesMap = <String, SplayTreeMap<int, Rect>>{};
  final lines = atlas.split('\n');

  int i = 3;

  while (i < lines.length && lines[i] != "") {
    final tempValues = <String, String>{};
    final name = lines[i];
    i++;
    while (i < lines.length && lines[i].contains(":")) {
      final splitted = lines[i].split(":");
      tempValues[splitted[0]] = splitted[1];
      i++;
    }
    if (tempValues.containsKey("index")) {
      //animation
      if (!framesMap.containsKey(name)) framesMap[name] = SplayTreeMap<int, Rect>();
      framesMap[name]![int.parse(tempValues["index"]!)] = getRect(tempValues["bounds"]!);
    } else {
      //texture
      textures[name] = getRect(tempValues["bounds"]!);
    }
  }

  final pathSplit = path.split("/");
  pathSplit.removeLast();
  pathSplit.add(lines[0]);
  final image = await ImageUtils.loadImageFromAssets(pathSplit.join("/"));
  assert(image != null, "Batch image could not be loaded !");

  return SpriteBatch._(
    image:
        flippable ? await ImageUtils.generateFlipped(image!, flipPaint ?? _emptyPaint) : image!,
    textures: textures,
    frames: framesMap.map((key, value) => MapEntry(key, value.values.toList())),
  );
}