of method

Future<Image?> of(String path, { DateTime? modified, })

The picture of the model at path as it was at modified: null without a GPU or when the file can't be read as a model.

Implementation

Future<ui.Image?> of(String path, {DateTime? modified}) {
  final key = '$path@${modified?.millisecondsSinceEpoch}';
  return _pictures.putIfAbsent(key, () {
    final done = Completer<ui.Image?>();
    // One at a time: each holds the GPU until its frame is back.
    _queue = _queue.then((_) async {
      ui.Image? image;
      try {
        final cached = _cacheFile(path, modified);
        image = cached != null && cached.existsSync()
            ? await _decode(await cached.readAsBytes())
            : null;
        if (image == null) {
          image = await _render(path);
          if (image != null && cached != null) await _store(cached, image);
        }
      } on Object catch (error) {
        debugPrint(
          'just_game_engine_editor: no thumbnail for "$path": $error',
        );
      }
      _done[key] = image;
      done.complete(image);
      revision.value++;
    });
    return done.future;
  });
}