Function GetProducedCargoOfHouse

src/town_gui.cpp:1620–1643

* Get the cargo types produced by a house. * @param hs HouseSpec of the house. * @returns Mask of cargo types produced by the house. */

 * @returns Mask of cargo types produced by the house.
 */
static CargoTypes GetProducedCargoOfHouse(const HouseSpec *hs)
{
	CargoTypes produced{};
	if (hs->callback_mask.Test(HouseCallbackMask::ProduceCargo)) {
		for (uint i = 0; i < 256; i++) {
			uint16_t callback = GetHouseCallback(CBID_HOUSE_PRODUCE_CARGO, i, 0, hs->Index(), nullptr, INVALID_TILE, {}, true);

			if (callback == CALLBACK_FAILED || callback == CALLBACK_HOUSEPRODCARGO_END) break;

			CargoType cargo = GetCargoTranslation(GB(callback, 8, 7), hs->grf_prop.grffile);
			if (!IsValidCargoType(cargo)) continue;

			uint amt = GB(callback, 0, 8);
			if (amt == 0) continue;

			SetBit(produced, cargo);
		}
	} else {
		/* Cargo is not controlled by NewGRF, town production effect is used instead. */
		for (const CargoSpec *cs : CargoSpec::town_production_cargoes[TPE_PASSENGERS]) SetBit(produced, cs->Index());
		for (const CargoSpec *cs : CargoSpec::town_production_cargoes[TPE_MAIL]) SetBit(produced, cs->Index());
	}
	return produced;
}

struct BuildHouseWindow : public PickerWindow {
	std::string house_info{};