takeSnapshot method

CancelableOperation<ByteData?> takeSnapshot({ Alignment copyrightPosition = sdk.Alignment.bottomRight, })

Метод для получения снэпшота карты.

Implementation

CancelableOperation<ByteData?> takeSnapshot({
  sdk.Alignment copyrightPosition = sdk.Alignment.bottomRight,
}) {
  if (_renderer == null) {
    throw NativeException(
      'Map must be initialized (getMapAsync completed) before takeSnapshot',
    );
  }

  final completer = Completer<ByteData>();
  _renderer!.takeSnapshot(copyrightPosition).value.then(
    (imageData) {
      final buffer = imageData.data.buffer;
      final imageDataList = buffer.asUint8List(
        imageData.data.offsetInBytes,
        imageData.data.lengthInBytes,
      );
      final imageWidth = imageData.size.width;
      final imageHeight = imageData.size.height;
      ui.decodeImageFromPixels(
        imageDataList,
        imageWidth,
        imageHeight,
        ui.PixelFormat.rgba8888,
        (image) =>
            image.toByteData(format: ui.ImageByteFormat.png).then((value) {
          final buffer = value?.buffer;
          completer.complete(buffer == null ? null : ByteData.view(buffer));
        }),
      );
    },
  );
  return CancelableOperation.fromFuture(completer.future);
}