Function RebuildViewportOverlay

src/viewport.cpp:2527–2535

}

void RebuildViewportOverlay(Window *w)
{
	if (w->viewport->overlay != nullptr &&
			w->viewport->overlay->GetCompanyMask().Any() &&
			w->viewport->overlay->GetCargoMask() != 0) {
		w->viewport->overlay->SetDirty();
		w->SetDirty();
	}
}

/**
 * Scrolls the viewport in a window to a given location.