Function GetEngineLivery

src/vehicle.cpp:2045–2071

* Determines the livery for a vehicle. * @param engine_type EngineID of the vehicle * @param company Owner of the vehicle * @param parent_engine_type EngineID of the front vehicle. VehicleID::Invalid() if vehicle is at front itself. * @param v the vehicle. nullptr if in purchase list etc. * @param livery_setting The livery settings to use for acquiring the livery information. * @return liver

 * @return livery to use
 */
const Livery *GetEngineLivery(EngineID engine_type, CompanyID company, EngineID parent_engine_type, const Vehicle *v, uint8_t livery_setting)
{
	const Company *c = Company::Get(company);
	LiveryScheme scheme = LS_DEFAULT;

	if (livery_setting == LIT_ALL || (livery_setting == LIT_COMPANY && company == _local_company)) {
		if (v != nullptr) {
			const Group *g = Group::GetIfValid(v->First()->group_id);
			if (g != nullptr) {
				/* Traverse parents until we find a livery or reach the top */
				while (!g->livery.in_use.Any({Livery::Flag::Primary, Livery::Flag::Secondary}) && g->parent != GroupID::Invalid()) {
					g = Group::Get(g->parent);
				}
				if (g->livery.in_use.Any({Livery::Flag::Primary, Livery::Flag::Secondary})) return &g->livery;
			}
		}

		/* The default livery is always available for use, but its in_use flag determines
		 * whether any _other_ liveries are in use. */
		if (c->livery[LS_DEFAULT].in_use.Any({Livery::Flag::Primary, Livery::Flag::Secondary})) {
			/* Determine the livery scheme to use */
			scheme = GetEngineLiveryScheme(engine_type, parent_engine_type, v);
		}
	}

	return &c->livery[scheme];
}


static PaletteID GetEngineColourMap(EngineID engine_type, CompanyID company, EngineID parent_engine_type, const Vehicle *v)