auto display_func = [this, primary_stream_idx, frame_lower, secondary_frame, fade_alpha]{
destination->setFrame(primary_stream_idx, frame_lower, secondary_frame, fade_alpha);
};
auto display_func = [this, primary_stream_idx, frame_lower, secondary_frame, fade_alpha]{
destination->setFrame(primary_stream_idx, frame_lower, secondary_frame, fade_alpha);
};