newgrf_act3.cpp

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/*
 * 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/>.
 */
 
#include "../stdafx.h"
 
#include "../debug.h"
#include "../house.h"
#include "../newgrf_engine.h"
#include "../newgrf_badge.h"
#include "../newgrf_badge_type.h"
#include "../newgrf_cargo.h"
#include "../newgrf_house.h"
#include "../newgrf_station.h"
#include "../industrytype.h"
#include "../newgrf_canal.h"
#include "../newgrf_airporttiles.h"
#include "../newgrf_airport.h"
#include "../newgrf_object.h"
#include "../error.h"
#include "../vehicle_base.h"
#include "../road.h"
#include "../newgrf_roadstop.h"
#include "newgrf_bytereader.h"
#include "newgrf_internal_vehicle.h"
#include "newgrf_internal.h"
 
#include "../safeguards.h"
 
 
static CargoType TranslateCargo(GrfSpecFeature feature, uint8_t ctype)
{
  /* Special cargo types for purchase list and stations */
  if ((feature == GSF_STATIONS || feature == GSF_ROADSTOPS) && ctype == 0xFE) return CargoGRFFileProps::SG_DEFAULT_NA;
  if (ctype == 0xFF) return CargoGRFFileProps::SG_PURCHASE;
 
  auto cargo_list = GetCargoTranslationTable(*_cur_gps.grffile);
 
  /* Check if the cargo type is out of bounds of the cargo translation table */
  if (ctype >= cargo_list.size()) {
    GrfMsg(1, "TranslateCargo: Cargo type {} out of range (max {}), skipping.", ctype, (unsigned int)_cur_gps.grffile->cargo_list.size() - 1);
    return INVALID_CARGO;
  }
 
  /* Look up the cargo label from the translation table */
  CargoLabel cl = cargo_list[ctype];
  if (cl == CT_INVALID) {
    GrfMsg(5, "TranslateCargo: Cargo type {} not available in this climate, skipping.", ctype);
    return INVALID_CARGO;
  }
 
  CargoType cargo_type = GetCargoTypeByLabel(cl);
  if (!IsValidCargoType(cargo_type)) {
    GrfMsg(5, "TranslateCargo: Cargo '{:c}{:c}{:c}{:c}' unsupported, skipping.", GB(cl.base(), 24, 8), GB(cl.base(), 16, 8), GB(cl.base(), 8, 8), GB(cl.base(), 0, 8));
    return INVALID_CARGO;
  }
 
  GrfMsg(6, "TranslateCargo: Cargo '{:c}{:c}{:c}{:c}' mapped to cargo type {}.", GB(cl.base(), 24, 8), GB(cl.base(), 16, 8), GB(cl.base(), 8, 8), GB(cl.base(), 0, 8), cargo_type);
  return cargo_type;
}
 
 
static bool IsValidGroupID(uint16_t groupid, std::string_view function)
{
  if (groupid > MAX_SPRITEGROUP || _cur_gps.spritegroups[groupid] == nullptr) {
    GrfMsg(1, "{}: Spritegroup 0x{:04X} out of range or empty, skipping.", function, groupid);
    return false;
  }
 
  return true;
}
 
static void VehicleMapSpriteGroup(ByteReader &buf, GrfSpecFeature feature, uint8_t idcount)
{
  static std::vector<EngineID> last_engines; // Engine IDs are remembered in case the next action is a wagon override.
  bool wagover = false;
 
  /* Test for 'wagon override' flag */
  if (HasBit(idcount, 7)) {
    wagover = true;
    /* Strip off the flag */
    idcount = GB(idcount, 0, 7);
 
    if (last_engines.empty()) {
      GrfMsg(0, "VehicleMapSpriteGroup: WagonOverride: No engine to do override with");
      return;
    }
 
    GrfMsg(6, "VehicleMapSpriteGroup: WagonOverride: {} engines, {} wagons", last_engines.size(), idcount);
  } else {
    last_engines.resize(idcount);
  }
 
  std::vector<EngineID> engines;
  engines.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    Engine *e = GetNewEngine(_cur_gps.grffile, (VehicleType)feature, buf.ReadExtendedByte());
    if (e == nullptr) {
      /* No engine could be allocated?!? Deal with it. Okay,
       * this might look bad. Also make sure this NewGRF
       * gets disabled, as a half loaded one is bad. */
      HandleChangeInfoResult("VehicleMapSpriteGroup", CIR_INVALID_ID, feature, 0);
      return;
    }
 
    engines.push_back(e->index);
    if (!wagover) last_engines[i] = engines[i];
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "VehicleMapSpriteGroup")) continue;
 
    GrfMsg(8, "VehicleMapSpriteGroup: * [{}] Cargo type 0x{:X}, group id 0x{:02X}", c, ctype, groupid);
 
    CargoType cargo_type = TranslateCargo(feature, ctype);
    if (!IsValidCargoType(cargo_type)) continue;
 
    for (uint i = 0; i < idcount; i++) {
      EngineID engine = engines[i];
 
      GrfMsg(7, "VehicleMapSpriteGroup: [{}] Engine {}...", i, engine);
 
      if (wagover) {
        SetWagonOverrideSprites(engine, cargo_type, _cur_gps.spritegroups[groupid], last_engines);
      } else {
        SetCustomEngineSprites(engine, cargo_type, _cur_gps.spritegroups[groupid]);
      }
    }
  }
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "VehicleMapSpriteGroup")) return;
 
  GrfMsg(8, "-- Default group id 0x{:04X}", groupid);
 
  for (uint i = 0; i < idcount; i++) {
    EngineID engine = engines[i];
 
    if (wagover) {
      SetWagonOverrideSprites(engine, CargoGRFFileProps::SG_DEFAULT, _cur_gps.spritegroups[groupid], last_engines);
    } else {
      SetCustomEngineSprites(engine, CargoGRFFileProps::SG_DEFAULT, _cur_gps.spritegroups[groupid]);
      SetEngineGRF(engine, _cur_gps.grffile);
    }
  }
}
 
 
static void CanalMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  std::vector<uint16_t> cfs;
  cfs.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    cfs.push_back(buf.ReadExtendedByte());
  }
 
  uint8_t cidcount = buf.ReadByte();
  buf.Skip(cidcount * 3);
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "CanalMapSpriteGroup")) return;
 
  for (auto &cf : cfs) {
    if (cf >= CF_END) {
      GrfMsg(1, "CanalMapSpriteGroup: Canal subset {} out of range, skipping", cf);
      continue;
    }
 
    _water_feature[cf].grffile = _cur_gps.grffile;
    _water_feature[cf].group = _cur_gps.spritegroups[groupid];
  }
}
 
 
static void StationMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->stations.empty()) {
    GrfMsg(1, "StationMapSpriteGroup: No stations defined, skipping");
    return;
  }
 
  std::vector<uint16_t> stations;
  stations.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    stations.push_back(buf.ReadExtendedByte());
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "StationMapSpriteGroup")) continue;
 
    CargoType cargo_type = TranslateCargo(GSF_STATIONS, ctype);
    if (!IsValidCargoType(cargo_type)) continue;
 
    for (auto &station : stations) {
      StationSpec *statspec = station >= _cur_gps.grffile->stations.size() ? nullptr : _cur_gps.grffile->stations[station].get();
 
      if (statspec == nullptr) {
        GrfMsg(1, "StationMapSpriteGroup: Station {} undefined, skipping", station);
        continue;
      }
 
      statspec->grf_prop.SetSpriteGroup(cargo_type, _cur_gps.spritegroups[groupid]);
    }
  }
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "StationMapSpriteGroup")) return;
 
  for (auto &station : stations) {
    StationSpec *statspec = station >= _cur_gps.grffile->stations.size() ? nullptr : _cur_gps.grffile->stations[station].get();
 
    if (statspec == nullptr) {
      GrfMsg(1, "StationMapSpriteGroup: Station {} undefined, skipping", station);
      continue;
    }
 
    if (statspec->grf_prop.HasGrfFile()) {
      GrfMsg(1, "StationMapSpriteGroup: Station {} mapped multiple times, skipping", station);
      continue;
    }
 
    statspec->grf_prop.SetSpriteGroup(CargoGRFFileProps::SG_DEFAULT, _cur_gps.spritegroups[groupid]);
    statspec->grf_prop.SetGRFFile(_cur_gps.grffile);
    statspec->grf_prop.local_id = station;
    StationClass::Assign(statspec);
  }
}
 
 
static void TownHouseMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->housespec.empty()) {
    GrfMsg(1, "TownHouseMapSpriteGroup: No houses defined, skipping");
    return;
  }
 
  std::vector<uint16_t> houses;
  houses.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    houses.push_back(buf.ReadExtendedByte());
  }
 
  auto set_sprite_group = [&houses](StandardSpriteGroup key, uint16_t groupid) {
    if (!IsValidGroupID(groupid, "TownHouseMapSpriteGroup")) return;
 
    for (auto &house : houses) {
      HouseSpec *hs = house >= _cur_gps.grffile->housespec.size() ? nullptr : _cur_gps.grffile->housespec[house].get();
      if (hs == nullptr) {
        GrfMsg(1, "TownHouseMapSpriteGroup: House {} undefined, skipping.", house);
        continue;
      }
 
      hs->grf_prop.SetSpriteGroup(key, _cur_gps.spritegroups[groupid]);
    }
  };
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (ctype == 0xFF) {
      set_sprite_group(StandardSpriteGroup::Purchase, groupid);
    } else {
      GrfMsg(1, "TownHouseMapSpriteGroup: Invalid cargo bitnum {} for houses, skipping.", ctype);
    }
  }
  set_sprite_group(StandardSpriteGroup::Default, buf.ReadWord());
}
 
static void IndustryMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->industryspec.empty()) {
    GrfMsg(1, "IndustryMapSpriteGroup: No industries defined, skipping");
    return;
  }
 
  std::vector<uint16_t> industries;
  industries.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    industries.push_back(buf.ReadExtendedByte());
  }
 
  auto set_sprite_group = [&industries](StandardSpriteGroup key, uint16_t groupid) {
    if (!IsValidGroupID(groupid, "IndustryMapSpriteGroup")) return;
 
    for (auto &industry : industries) {
      IndustrySpec *indsp = industry >= _cur_gps.grffile->industryspec.size() ? nullptr : _cur_gps.grffile->industryspec[industry].get();
      if (indsp == nullptr) {
        GrfMsg(1, "IndustryMapSpriteGroup: Industry {} undefined, skipping", industry);
        continue;
      }
 
      indsp->grf_prop.SetSpriteGroup(key, _cur_gps.spritegroups[groupid]);
    }
  };
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (ctype == 0xFF) {
      set_sprite_group(StandardSpriteGroup::Purchase, groupid);
    } else {
      GrfMsg(1, "IndustryMapSpriteGroup: Invalid cargo bitnum {} for industries, skipping.", ctype);
    }
  }
  set_sprite_group(StandardSpriteGroup::Default, buf.ReadWord());
}
 
static void IndustrytileMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->indtspec.empty()) {
    GrfMsg(1, "IndustrytileMapSpriteGroup: No industry tiles defined, skipping");
    return;
  }
 
  std::vector<uint16_t> indtiles;
  indtiles.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    indtiles.push_back(buf.ReadExtendedByte());
  }
 
  auto set_sprite_group = [&indtiles](StandardSpriteGroup key, uint16_t groupid) {
    if (!IsValidGroupID(groupid, "IndustrytileMapSpriteGroup")) return;
 
    for (auto &indtile : indtiles) {
      IndustryTileSpec *indtsp = indtile >= _cur_gps.grffile->indtspec.size() ? nullptr : _cur_gps.grffile->indtspec[indtile].get();
      if (indtsp == nullptr) {
        GrfMsg(1, "IndustrytileMapSpriteGroup: Industry tile {} undefined, skipping", indtile);
        continue;
      }
 
      indtsp->grf_prop.SetSpriteGroup(key, _cur_gps.spritegroups[groupid]);
    }
  };
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (ctype == 0xFF) {
      set_sprite_group(StandardSpriteGroup::Purchase, groupid);
    } else {
      GrfMsg(1, "IndustrytileMapSpriteGroup: Invalid cargo bitnum {} for industry tiles, skipping.", ctype);
    }
  }
  set_sprite_group(StandardSpriteGroup::Default, buf.ReadWord());
}
 
static void CargoMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  std::vector<uint16_t> cargoes;
  cargoes.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    cargoes.push_back(buf.ReadExtendedByte());
  }
 
  /* Skip the cargo type section, we only care about the default group */
  uint8_t cidcount = buf.ReadByte();
  buf.Skip(cidcount * 3);
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "CargoMapSpriteGroup")) return;
 
  for (auto &cargo_type : cargoes) {
    if (cargo_type >= NUM_CARGO) {
      GrfMsg(1, "CargoMapSpriteGroup: Cargo type {} out of range, skipping", cargo_type);
      continue;
    }
 
    CargoSpec *cs = CargoSpec::Get(cargo_type);
    cs->grffile = _cur_gps.grffile;
    cs->group = _cur_gps.spritegroups[groupid];
  }
}
 
static void ObjectMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->objectspec.empty()) {
    GrfMsg(1, "ObjectMapSpriteGroup: No object tiles defined, skipping");
    return;
  }
 
  std::vector<uint16_t> objects;
  objects.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    objects.push_back(buf.ReadExtendedByte());
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "ObjectMapSpriteGroup")) continue;
 
    /* The only valid option here is purchase list sprite groups. */
    if (ctype != 0xFF) {
      GrfMsg(1, "ObjectMapSpriteGroup: Invalid cargo bitnum {} for objects, skipping.", ctype);
      continue;
    }
 
    for (auto &object : objects) {
      ObjectSpec *spec = object >= _cur_gps.grffile->objectspec.size() ? nullptr : _cur_gps.grffile->objectspec[object].get();
 
      if (spec == nullptr) {
        GrfMsg(1, "ObjectMapSpriteGroup: Object {} undefined, skipping", object);
        continue;
      }
 
      spec->grf_prop.SetSpriteGroup(StandardSpriteGroup::Purchase, _cur_gps.spritegroups[groupid]);
    }
  }
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "ObjectMapSpriteGroup")) return;
 
  for (auto &object : objects) {
    ObjectSpec *spec = object >= _cur_gps.grffile->objectspec.size() ? nullptr : _cur_gps.grffile->objectspec[object].get();
 
    if (spec == nullptr) {
      GrfMsg(1, "ObjectMapSpriteGroup: Object {} undefined, skipping", object);
      continue;
    }
 
    if (spec->grf_prop.HasGrfFile()) {
      GrfMsg(1, "ObjectMapSpriteGroup: Object {} mapped multiple times, skipping", object);
      continue;
    }
 
    spec->grf_prop.SetSpriteGroup(StandardSpriteGroup::Default, _cur_gps.spritegroups[groupid]);
    spec->grf_prop.SetGRFFile(_cur_gps.grffile);
    spec->grf_prop.local_id = object;
  }
}
 
static void RailTypeMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  std::vector<uint8_t> railtypes;
  railtypes.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    uint16_t id = buf.ReadExtendedByte();
    railtypes.push_back(id < RAILTYPE_END ? _cur_gps.grffile->railtype_map[id] : INVALID_RAILTYPE);
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "RailTypeMapSpriteGroup")) continue;
 
    if (ctype >= RTSG_END) continue;
 
    extern RailTypeInfo _railtypes[RAILTYPE_END];
    for (auto &railtype : railtypes) {
      if (railtype != INVALID_RAILTYPE) {
        RailTypeInfo *rti = &_railtypes[railtype];
 
        rti->grffile[ctype] = _cur_gps.grffile;
        rti->group[ctype] = _cur_gps.spritegroups[groupid];
      }
    }
  }
 
  /* Railtypes do not use the default group. */
  buf.ReadWord();
}
 
static void RoadTypeMapSpriteGroup(ByteReader &buf, uint8_t idcount, RoadTramType rtt)
{
  std::array<RoadType, ROADTYPE_END> &type_map = (rtt == RTT_TRAM) ? _cur_gps.grffile->tramtype_map : _cur_gps.grffile->roadtype_map;
 
  std::vector<uint8_t> roadtypes;
  roadtypes.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    uint16_t id = buf.ReadExtendedByte();
    roadtypes.push_back(id < ROADTYPE_END ? type_map[id] : INVALID_ROADTYPE);
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "RoadTypeMapSpriteGroup")) continue;
 
    if (ctype >= ROTSG_END) continue;
 
    extern RoadTypeInfo _roadtypes[ROADTYPE_END];
    for (auto &roadtype : roadtypes) {
      if (roadtype != INVALID_ROADTYPE) {
        RoadTypeInfo *rti = &_roadtypes[roadtype];
 
        rti->grffile[ctype] = _cur_gps.grffile;
        rti->group[ctype] = _cur_gps.spritegroups[groupid];
      }
    }
  }
 
  /* Roadtypes do not use the default group. */
  buf.ReadWord();
}
 
static void AirportMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->airportspec.empty()) {
    GrfMsg(1, "AirportMapSpriteGroup: No airports defined, skipping");
    return;
  }
 
  std::vector<uint16_t> airports;
  airports.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    airports.push_back(buf.ReadExtendedByte());
  }
 
  auto set_sprite_group = [&airports](StandardSpriteGroup key, uint16_t groupid) {
    if (!IsValidGroupID(groupid, "AirportMapSpriteGroup")) return;
 
    for (auto &airport : airports) {
      AirportSpec *as = airport >= _cur_gps.grffile->airportspec.size() ? nullptr : _cur_gps.grffile->airportspec[airport].get();
      if (as == nullptr) {
        GrfMsg(1, "AirportMapSpriteGroup: Airport {} undefined, skipping", airport);
        continue;
      }
 
      as->grf_prop.SetSpriteGroup(key, _cur_gps.spritegroups[groupid]);
    }
  };
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (ctype == 0xFF) {
      set_sprite_group(StandardSpriteGroup::Purchase, groupid);
    } else {
      GrfMsg(1, "AirportMapSpriteGroup: Invalid cargo bitnum {} for airports, skipping.", ctype);
    }
  }
  set_sprite_group(StandardSpriteGroup::Default, buf.ReadWord());
}
 
static void AirportTileMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->airtspec.empty()) {
    GrfMsg(1, "AirportTileMapSpriteGroup: No airport tiles defined, skipping");
    return;
  }
 
  std::vector<uint16_t> airptiles;
  airptiles.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    airptiles.push_back(buf.ReadExtendedByte());
  }
 
  auto set_sprite_group = [&airptiles](StandardSpriteGroup key, uint16_t groupid) {
    if (!IsValidGroupID(groupid, "AirportTileMapSpriteGroup")) return;
 
    for (auto &airptile : airptiles) {
      AirportTileSpec *airtsp = airptile >= _cur_gps.grffile->airtspec.size() ? nullptr : _cur_gps.grffile->airtspec[airptile].get();
      if (airtsp == nullptr) {
        GrfMsg(1, "AirportTileMapSpriteGroup: Airport tile {} undefined, skipping", airptile);
        continue;
      }
 
      airtsp->grf_prop.SetSpriteGroup(key, _cur_gps.spritegroups[groupid]);
    }
  };
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (ctype == 0xFF) {
      set_sprite_group(StandardSpriteGroup::Purchase, groupid);
    } else {
      GrfMsg(1, "AirportTileMapSpriteGroup: Invalid cargo bitnum {} for airport tiles, skipping.", ctype);
    }
  }
  set_sprite_group(StandardSpriteGroup::Default, buf.ReadWord());
}
 
static void RoadStopMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->roadstops.empty()) {
    GrfMsg(1, "RoadStopMapSpriteGroup: No roadstops defined, skipping");
    return;
  }
 
  std::vector<uint16_t> roadstops;
  roadstops.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    roadstops.push_back(buf.ReadExtendedByte());
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "RoadStopMapSpriteGroup")) continue;
 
    CargoType cargo_type = TranslateCargo(GSF_ROADSTOPS, ctype);
    if (!IsValidCargoType(cargo_type)) continue;
 
    for (auto &roadstop : roadstops) {
      RoadStopSpec *roadstopspec = roadstop >= _cur_gps.grffile->roadstops.size() ? nullptr : _cur_gps.grffile->roadstops[roadstop].get();
 
      if (roadstopspec == nullptr) {
        GrfMsg(1, "RoadStopMapSpriteGroup: Road stop {} undefined, skipping", roadstop);
        continue;
      }
 
      roadstopspec->grf_prop.SetSpriteGroup(cargo_type, _cur_gps.spritegroups[groupid]);
    }
  }
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "RoadStopMapSpriteGroup")) return;
 
  for (auto &roadstop : roadstops) {
    RoadStopSpec *roadstopspec = roadstop >= _cur_gps.grffile->roadstops.size() ? nullptr : _cur_gps.grffile->roadstops[roadstop].get();
 
    if (roadstopspec == nullptr) {
      GrfMsg(1, "RoadStopMapSpriteGroup: Road stop {} undefined, skipping.", roadstop);
      continue;
    }
 
    if (roadstopspec->grf_prop.HasGrfFile()) {
      GrfMsg(1, "RoadStopMapSpriteGroup: Road stop {} mapped multiple times, skipping", roadstop);
      continue;
    }
 
    roadstopspec->grf_prop.SetSpriteGroup(CargoGRFFileProps::SG_DEFAULT, _cur_gps.spritegroups[groupid]);
    roadstopspec->grf_prop.SetGRFFile(_cur_gps.grffile);
    roadstopspec->grf_prop.local_id = roadstop;
    RoadStopClass::Assign(roadstopspec);
  }
}
 
static void BadgeMapSpriteGroup(ByteReader &buf, uint8_t idcount)
{
  if (_cur_gps.grffile->badge_map.empty()) {
    GrfMsg(1, "BadgeMapSpriteGroup: No badges defined, skipping");
    return;
  }
 
  std::vector<uint16_t> local_ids;
  local_ids.reserve(idcount);
  for (uint i = 0; i < idcount; i++) {
    local_ids.push_back(buf.ReadExtendedByte());
  }
 
  uint8_t cidcount = buf.ReadByte();
  for (uint c = 0; c < cidcount; c++) {
    uint8_t ctype = buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "BadgeMapSpriteGroup")) continue;
 
    if (ctype >= GSF_END) continue;
 
    for (const auto &local_id : local_ids) {
      auto found = _cur_gps.grffile->badge_map.find(local_id);
      if (found == std::end(_cur_gps.grffile->badge_map)) {
        GrfMsg(1, "BadgeMapSpriteGroup: Badge {} undefined, skipping", local_id);
        continue;
      }
 
      auto &badge = *GetBadge(found->second);
      badge.grf_prop.SetSpriteGroup(static_cast<GrfSpecFeature>(ctype), _cur_gps.spritegroups[groupid]);
    }
  }
 
  uint16_t groupid = buf.ReadWord();
  if (!IsValidGroupID(groupid, "BadgeMapSpriteGroup")) return;
 
  for (auto &local_id : local_ids) {
    auto found = _cur_gps.grffile->badge_map.find(local_id);
    if (found == std::end(_cur_gps.grffile->badge_map)) {
      GrfMsg(1, "BadgeMapSpriteGroup: Badge {} undefined, skipping", local_id);
      continue;
    }
 
    auto &badge = *GetBadge(found->second);
    badge.grf_prop.SetSpriteGroup(GSF_DEFAULT, _cur_gps.spritegroups[groupid]);
    badge.grf_prop.SetGRFFile(_cur_gps.grffile);
    badge.grf_prop.local_id = local_id;
  }
}
 
/* Action 0x03 */
static void FeatureMapSpriteGroup(ByteReader &buf)
{
  /* <03> <feature> <n-id> <ids>... <num-cid> [<cargo-type> <cid>]... <def-cid>
   * id-list    := [<id>] [id-list]
   * cargo-list := <cargo-type> <cid> [cargo-list]
   *
   * B feature       see action 0
   * B n-id          bits 0-6: how many IDs this definition applies to
   *                 bit 7: if set, this is a wagon override definition (see below)
   * E ids           the IDs for which this definition applies
   * B num-cid       number of cargo IDs (sprite group IDs) in this definition
   *                 can be zero, in that case the def-cid is used always
   * B cargo-type    type of this cargo type (e.g. mail=2, wood=7, see below)
   * W cid           cargo ID (sprite group ID) for this type of cargo
   * W def-cid       default cargo ID (sprite group ID) */
 
  GrfSpecFeature feature{buf.ReadByte()};
  uint8_t idcount = buf.ReadByte();
 
  if (feature >= GSF_END) {
    GrfMsg(1, "FeatureMapSpriteGroup: Unsupported feature 0x{:02X}, skipping", feature);
    return;
  }
 
  /* If idcount is zero, this is a feature callback */
  if (idcount == 0) {
    /* Skip number of cargo ids? */
    buf.ReadByte();
    uint16_t groupid = buf.ReadWord();
    if (!IsValidGroupID(groupid, "FeatureMapSpriteGroup")) return;
 
    GrfMsg(6, "FeatureMapSpriteGroup: Adding generic feature callback for feature 0x{:02X}", feature);
 
    AddGenericCallback(feature, _cur_gps.grffile, _cur_gps.spritegroups[groupid]);
    return;
  }
 
  /* Mark the feature as used by the grf (generic callbacks do not count) */
  _cur_gps.grffile->grf_features.Set(feature);
 
  GrfMsg(6, "FeatureMapSpriteGroup: Feature 0x{:02X}, {} ids", feature, idcount);
 
  switch (feature) {
    case GSF_TRAINS:
    case GSF_ROADVEHICLES:
    case GSF_SHIPS:
    case GSF_AIRCRAFT:
      VehicleMapSpriteGroup(buf, feature, idcount);
      return;
 
    case GSF_CANALS:
      CanalMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_STATIONS:
      StationMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_HOUSES:
      TownHouseMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_INDUSTRIES:
      IndustryMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_INDUSTRYTILES:
      IndustrytileMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_CARGOES:
      CargoMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_AIRPORTS:
      AirportMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_OBJECTS:
      ObjectMapSpriteGroup(buf, idcount);
      break;
 
    case GSF_RAILTYPES:
      RailTypeMapSpriteGroup(buf, idcount);
      break;
 
    case GSF_ROADTYPES:
      RoadTypeMapSpriteGroup(buf, idcount, RTT_ROAD);
      break;
 
    case GSF_TRAMTYPES:
      RoadTypeMapSpriteGroup(buf, idcount, RTT_TRAM);
      break;
 
    case GSF_AIRPORTTILES:
      AirportTileMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_ROADSTOPS:
      RoadStopMapSpriteGroup(buf, idcount);
      return;
 
    case GSF_BADGES:
      BadgeMapSpriteGroup(buf, idcount);
      break;
 
    default:
      GrfMsg(1, "FeatureMapSpriteGroup: Unsupported feature 0x{:02X}, skipping", feature);
      return;
  }
}
 
template <> void GrfActionHandler<0x03>::FileScan(ByteReader &) { }
template <> void GrfActionHandler<0x03>::SafetyScan(ByteReader &buf) { GRFUnsafe(buf); }
template <> void GrfActionHandler<0x03>::LabelScan(ByteReader &) { }
template <> void GrfActionHandler<0x03>::Init(ByteReader &) { }
template <> void GrfActionHandler<0x03>::Reserve(ByteReader &) { }
template <> void GrfActionHandler<0x03>::Activation(ByteReader &buf) { FeatureMapSpriteGroup(buf); }