private void _generateImages(FileVersion fileVersion, InputStream inputStream) throws Exception {

    if (GhostscriptUtil.isEnabled()) {
      _generateImagesGS(fileVersion, inputStream);
    } else {
      _generateImagesPB(fileVersion, inputStream);
    }
  }
  private void _generateImages(FileVersion fileVersion, File file) throws Exception {

    if (GhostscriptUtil.isEnabled()) {
      if (!_ghostscriptInitialized) {
        GhostscriptUtil.reset();

        _ghostscriptInitialized = true;
      }

      _generateImagesGS(fileVersion, file);
    } else {
      _generateImagesPB(fileVersion, file);
    }
  }