takePicture method

@override Future<void> takePicture(ImageCallback callback)

Take a picture and return the bytes in callback.

The default output is for a JPEG image.

This should only be called after passing as a parameter to a CameraController and CameraController.initialize has been called.

Implementation

@override
Future<void> takePicture(ImageCallback callback) async {
  verifyAttached();
  final CapturePhotoSettings oldSettings = nextPhotoSettings;
  nextPhotoSettings = _createNextPhotoSettings();

  photoCaptureDelegate = CapturePhotoCaptureDelegate(
    didFinishProcessingPhoto: (CapturePhoto photo) {
      final Uint8List? photoData = photo.fileDataRepresentation;
      if (photoData == null) {
        throw ArgumentError.value(
          photo.fileDataRepresentation,
          'photo.fileDataRepresentation',
          'Byte data returned empty. This could be due to the video codec type.',
        );
      } else {
        callback(photoData);
      }
    },
  );
  await capturePhotoOutput.capturePhotoWithSettings(
    oldSettings,
    photoCaptureDelegate,
  );
}