message: examples: demo: cv::drawMarker() is not available in OpenCV 2
diff: @@ -546,8 +546,17 @@ void AdiTofDemoView::_displayDepthImage() {
  std::unique_lock<std::mutex> imshow_lock(m_imshowMutex);
  if (m_center) {
  +#ifndef OPENCV2
  cv::drawMarker(m_depthImage, pointxy,
  cv::Scalar(color, color, color), cv::MARKER_CROSS);
  +#else
  + cv::line(m_depthImage, cv::Point(pointxy.x - 10, pointxy.y),
  + cv::Point(pointxy.x + 10, pointxy.y),
  + cv::Scalar(color, color, color));
  + cv::line(m_depthImage, cv::Point(pointxy.x, pointxy.y - 10),
  + cv::Point(pointxy.x, pointxy.y + 10),
  + cv::Scalar(color, color, color));
  +#endif
  cv::circle(m_depthImage, pointxy, 8,
  cv::Scalar(color, color, color));
  cv::putText(m_depthImage, text, pointxy + cv::Point2d(10, 20),
  