auto Random3Planes(size_t visible_frame_index, size_t nonvisible_frame_index, size_t x0, size_t y0, const std::pair<jxl::ImageF*, jxl::Rect>& plane0, const std::pair<jxl::ImageF*, jxl::Rect>& plane1, const std::pair<jxl::ImageF*, jxl::Rect>& plane2) -> void