/* $Id$ */ /* * This file is part of OpenTTD. * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2. * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>. */ /** @file newgrf_town.h Functions to handle the town part of NewGRF towns. */ #ifndef NEWGRF_TOWN_H #define NEWGRF_TOWN_H #include "town_type.h" #include "newgrf_spritegroup.h" /** * Scope resolver for a town. * @note Currently there is no direct town resolver; we only need to get town * variable results from inside stations, house tiles and industries, * and to check the town's persistent storage. */ struct TownScopeResolver : public ScopeResolver { Town *t; ///< %Town of the scope. bool readonly; ///< When set, persistent storage of the town is read-only, TownScopeResolver(ResolverObject *ro, Town *t, bool readonly); virtual uint32 GetVariable(byte variable, uint32 parameter, bool *available) const; virtual void StorePSA(uint reg, int32 value); }; /** Resolver of town properties. */ struct TownResolverObject : public ResolverObject { TownScopeResolver town_scope; ///< Scope resolver specific for towns. TownResolverObject(const struct GRFFile *grffile, Town *t, bool readonly); /* virtual */ ScopeResolver *GetScope(VarSpriteGroupScope scope = VSG_SCOPE_SELF, byte relative = 0) { switch (scope) { case VSG_SCOPE_SELF: return &town_scope; default: return ResolverObject::GetScope(scope, relative); } } }; #endif /* NEWGRF_TOWN_H */