message: Fix render opencv backend text slowdown
diff: @@ -167,27 +167,11 @@ void drawPrimitivesOCV(cv::Mat& in,
  break;
  }
  - // FIXME avoid code duplicate for Text and FText
  case Prim::index_of<Text>():
  {
  auto tp = cv::util::get<Text>(p);
  tp.color = converter.cvtColor(tp.color);
  -
  - int baseline = 0;
  - auto size = cv::getTextSize(tp.text, tp.ff, tp.fs, tp.thick, &baseline);
  - baseline += tp.thick;
  - size.height += baseline;
  -
  - // Allocate mask outside
  - cv::Mat mask(size, CV_8UC1, cv::Scalar::all(0));
  - // Org it's bottom left position for baseline
  - cv::Point org(0, mask.rows - baseline);
  - cv::putText(mask, tp.text, org, tp.ff, tp.fs, 255, tp.thick);
  -
  - // Org is bottom left point, transform it to top left point for blendImage
  - cv::Point tl(tp.org.x, tp.org.y - mask.size().height + baseline);
  -
  - blendTextMask(in, mask, tl, tp.color);
  + cv::putText(in, tp.text, tp.org, tp.ff, tp.fs, tp.color, tp.thick, tp.lt, tp.bottom_left_origin);
  break;
  }
  