openttd.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 "blitter/factory.hpp"
#include "sound/sound_driver.hpp"
#include "music/music_driver.hpp"
#include "video/video_driver.hpp"
 
#include "fontcache.h"
#include "error.h"
#include "gui.h"
 
#include "base_media_base.h"
#include "saveload/saveload.h"
#include "company_func.h"
#include "command_func.h"
#include "news_func.h"
#include "fios.h"
#include "aircraft.h"
#include "roadveh.h"
#include "train.h"
#include "ship.h"
#include "console_func.h"
#include "screenshot.h"
#include "network/network.h"
#include "network/network_func.h"
#include "ai/ai.hpp"
#include "ai/ai_config.hpp"
#include "settings_func.h"
#include "genworld.h"
#include "progress.h"
#include "strings_func.h"
#include "date_func.h"
#include "vehicle_func.h"
#include "gamelog.h"
#include "animated_tile_func.h"
#include "roadstop_base.h"
#include "elrail_func.h"
#include "rev.h"
#include "highscore.h"
#include "station_base.h"
#include "crashlog.h"
#include "engine_func.h"
#include "core/random_func.hpp"
#include "rail_gui.h"
#include "road_gui.h"
#include "core/backup_type.hpp"
#include "hotkeys.h"
#include "newgrf.h"
#include "misc/getoptdata.h"
#include "game/game.hpp"
#include "game/game_config.hpp"
#include "town.h"
#include "subsidy_func.h"
#include "gfx_layout.h"
#include "viewport_func.h"
#include "viewport_sprite_sorter.h"
#include "framerate_type.h"
#include "industry.h"
#include "network/network_gui.h"
#include "misc_cmd.h"
 
#include "linkgraph/linkgraphschedule.h"
 
#include <stdarg.h>
#include <system_error>
 
#include "safeguards.h"
 
#ifdef __EMSCRIPTEN__
# include <emscripten.h>
# include <emscripten/html5.h>
#endif
 
void CallLandscapeTick();
void IncreaseDate();
void DoPaletteAnimations();
void MusicLoop();
void ResetMusic();
void CallWindowGameTickEvent();
bool HandleBootstrap();
 
extern Company *DoStartupNewCompany(bool is_ai, CompanyID company = INVALID_COMPANY);
extern void ShowOSErrorBox(const char *buf, bool system);
extern std::string _config_file;
 
bool _save_config = false;
bool _request_newgrf_scan = false;
NewGRFScanCallback *_request_newgrf_scan_callback = nullptr;
 
void CDECL usererror(const char *s, ...)
{
  va_list va;
  char buf[512];
 
  va_start(va, s);
  vseprintf(buf, lastof(buf), s, va);
  va_end(va);
 
  ShowOSErrorBox(buf, false);
  if (VideoDriver::GetInstance() != nullptr) VideoDriver::GetInstance()->Stop();
 
#ifdef __EMSCRIPTEN__
  emscripten_exit_pointerlock();
  /* In effect, the game ends here. As emscripten_set_main_loop() caused
   * the stack to be unwound, the code after MainLoop() in
   * openttd_main() is never executed. */
  EM_ASM(if (window["openttd_syncfs"]) openttd_syncfs());
  EM_ASM(if (window["openttd_abort"]) openttd_abort());
#endif
 
  exit(1);
}
 
void CDECL error(const char *s, ...)
{
  va_list va;
  char buf[2048];
 
  va_start(va, s);
  vseprintf(buf, lastof(buf), s, va);
  va_end(va);
 
  if (VideoDriver::GetInstance() == nullptr || VideoDriver::GetInstance()->HasGUI()) {
    ShowOSErrorBox(buf, true);
  }
 
  /* Set the error message for the crash log and then invoke it. */
  CrashLog::SetErrorMessage(buf);
  abort();
}
 
void CDECL ShowInfoF(const char *str, ...)
{
  va_list va;
  char buf[1024];
  va_start(va, str);
  vseprintf(buf, lastof(buf), str, va);
  va_end(va);
  ShowInfo(buf);
}
 
static void ShowHelp()
{
  char buf[8192];
  char *p = buf;
 
  p += seprintf(p, lastof(buf), "OpenTTD %s\n", _openttd_revision);
  p = strecpy(p,
    "\n"
    "\n"
    "Command line options:\n"
    "  -v drv              = Set video driver (see below)\n"
    "  -s drv              = Set sound driver (see below) (param bufsize,hz)\n"
    "  -m drv              = Set music driver (see below)\n"
    "  -b drv              = Set the blitter to use (see below)\n"
    "  -r res              = Set resolution (for instance 800x600)\n"
    "  -h                  = Display this help text\n"
    "  -t year             = Set starting year\n"
    "  -d [[fac=]lvl[,...]]= Debug mode\n"
    "  -e                  = Start Editor\n"
    "  -g [savegame]       = Start new/save game immediately\n"
    "  -G seed             = Set random seed\n"
    "  -n [ip:port#company]= Join network game\n"
    "  -p password         = Password to join server\n"
    "  -P password         = Password to join company\n"
    "  -D [ip][:port]      = Start dedicated server\n"
    "  -l ip[:port]        = Redirect Debug()\n"
#if !defined(_WIN32)
    "  -f                  = Fork into the background (dedicated only)\n"
#endif
    "  -I graphics_set     = Force the graphics set (see below)\n"
    "  -S sounds_set       = Force the sounds set (see below)\n"
    "  -M music_set        = Force the music set (see below)\n"
    "  -c config_file      = Use 'config_file' instead of 'openttd.cfg'\n"
    "  -x                  = Never save configuration changes to disk\n"
    "  -X                  = Don't use global folders to search for files\n"
    "  -q savegame         = Write some information about the savegame and exit\n"
    "  -Q                  = Don't scan for/load NewGRF files on startup\n"
    "  -QQ                 = Disable NewGRF scanning/loading entirely\n"
    "\n",
    lastof(buf)
  );
 
  /* List the graphics packs */
  p = BaseGraphics::GetSetsList(p, lastof(buf));
 
  /* List the sounds packs */
  p = BaseSounds::GetSetsList(p, lastof(buf));
 
  /* List the music packs */
  p = BaseMusic::GetSetsList(p, lastof(buf));
 
  /* List the drivers */
  p = DriverFactoryBase::GetDriversInfo(p, lastof(buf));
 
  /* List the blitters */
  p = BlitterFactory::GetBlittersInfo(p, lastof(buf));
 
  /* List the debug facilities. */
  p = DumpDebugFacilityNames(p, lastof(buf));
 
  /* We need to initialize the AI, so it finds the AIs */
  AI::Initialize();
  const std::string ai_list = AI::GetConsoleList(true);
  p = strecpy(p, ai_list.c_str(), lastof(buf));
  AI::Uninitialize(true);
 
  /* We need to initialize the GameScript, so it finds the GSs */
  Game::Initialize();
  const std::string game_list = Game::GetConsoleList(true);
  p = strecpy(p, game_list.c_str(), lastof(buf));
  Game::Uninitialize(true);
 
  /* ShowInfo put output to stderr, but version information should go
   * to stdout; this is the only exception */
#if !defined(_WIN32)
  printf("%s\n", buf);
#else
  ShowInfo(buf);
#endif
}
 
static void WriteSavegameInfo(const char *name)
{
  extern SaveLoadVersion _sl_version;
  uint32 last_ottd_rev = 0;
  byte ever_modified = 0;
  bool removed_newgrfs = false;
 
  GamelogInfo(_load_check_data.gamelog_action, _load_check_data.gamelog_actions, &last_ottd_rev, &ever_modified, &removed_newgrfs);
 
  char buf[8192];
  char *p = buf;
  p += seprintf(p, lastof(buf), "Name:         %s\n", name);
  p += seprintf(p, lastof(buf), "Savegame ver: %d\n", _sl_version);
  p += seprintf(p, lastof(buf), "NewGRF ver:   0x%08X\n", last_ottd_rev);
  p += seprintf(p, lastof(buf), "Modified:     %d\n", ever_modified);
 
  if (removed_newgrfs) {
    p += seprintf(p, lastof(buf), "NewGRFs have been removed\n");
  }
 
  p = strecpy(p, "NewGRFs:\n", lastof(buf));
  if (_load_check_data.HasNewGrfs()) {
    for (GRFConfig *c = _load_check_data.grfconfig; c != nullptr; c = c->next) {
      char md5sum[33];
      md5sumToString(md5sum, lastof(md5sum), HasBit(c->flags, GCF_COMPATIBLE) ? c->original_md5sum : c->ident.md5sum);
      p += seprintf(p, lastof(buf), "%08X %s %s\n", c->ident.grfid, md5sum, c->filename);
    }
  }
 
  /* ShowInfo put output to stderr, but version information should go
   * to stdout; this is the only exception */
#if !defined(_WIN32)
  printf("%s\n", buf);
#else
  ShowInfo(buf);
#endif
}
 
 
static void ParseResolution(Dimension *res, const char *s)
{
  const char *t = strchr(s, 'x');
  if (t == nullptr) {
    ShowInfoF("Invalid resolution '%s'", s);
    return;
  }
 
  res->width  = std::max(strtoul(s, nullptr, 0), 64UL);
  res->height = std::max(strtoul(t + 1, nullptr, 0), 64UL);
}
 
 
static void ShutdownGame()
{
  IConsoleFree();
 
  if (_network_available) NetworkShutDown(); // Shut down the network and close any open connections
 
  DriverFactoryBase::ShutdownDrivers();
 
  UnInitWindowSystem();
 
  /* stop the scripts */
  AI::Uninitialize(false);
  Game::Uninitialize(false);
 
  /* Uninitialize variables that are allocated dynamically */
  GamelogReset();
 
  LinkGraphSchedule::Clear();
  PoolBase::Clean(PT_ALL);
 
  /* No NewGRFs were loaded when it was still bootstrapping. */
  if (_game_mode != GM_BOOTSTRAP) ResetNewGRFData();
 
  UninitFontCache();
}
 
static void LoadIntroGame(bool load_newgrfs = true)
{
  _game_mode = GM_MENU;
 
  if (load_newgrfs) ResetGRFConfig(false);
 
  /* Setup main window */
  ResetWindowSystem();
  SetupColoursAndInitialWindow();
 
  /* Load the default opening screen savegame */
  if (SaveOrLoad("opntitle.dat", SLO_LOAD, DFT_GAME_FILE, BASESET_DIR) != SL_OK) {
    GenerateWorld(GWM_EMPTY, 64, 64); // if failed loading, make empty world.
    SetLocalCompany(COMPANY_SPECTATOR);
  } else {
    SetLocalCompany(COMPANY_FIRST);
  }
 
  FixTitleGameZoom();
  _pause_mode = PM_UNPAUSED;
  _cursor.fix_at = false;
 
  CheckForMissingGlyphs();
 
  MusicLoop(); // ensure music is correct
}
 
void MakeNewgameSettingsLive()
{
  for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
    if (_settings_game.ai_config[c] != nullptr) {
      delete _settings_game.ai_config[c];
    }
  }
  if (_settings_game.game_config != nullptr) {
    delete _settings_game.game_config;
  }
 
  /* Copy newgame settings to active settings.
   * Also initialise old settings needed for savegame conversion. */
  _settings_game = _settings_newgame;
  _old_vds = _settings_client.company.vehicle;
 
  for (CompanyID c = COMPANY_FIRST; c < MAX_COMPANIES; c++) {
    _settings_game.ai_config[c] = nullptr;
    if (_settings_newgame.ai_config[c] != nullptr) {
      _settings_game.ai_config[c] = new AIConfig(_settings_newgame.ai_config[c]);
      if (!AIConfig::GetConfig(c, AIConfig::SSS_FORCE_GAME)->HasScript()) {
        AIConfig::GetConfig(c, AIConfig::SSS_FORCE_GAME)->Change(nullptr);
      }
    }
  }
  _settings_game.game_config = nullptr;
  if (_settings_newgame.game_config != nullptr) {
    _settings_game.game_config = new GameConfig(_settings_newgame.game_config);
  }
}
 
void OpenBrowser(const char *url)
{
  /* Make sure we only accept urls that are sure to open a browser. */
  if (strstr(url, "http://") != url && strstr(url, "https://") != url) return;
 
  extern void OSOpenBrowser(const char *url);
  OSOpenBrowser(url);
}
 
struct AfterNewGRFScan : NewGRFScanCallback {
  Year startyear = INVALID_YEAR;              
  uint32 generation_seed = GENERATE_NEW_SEED; 
  std::string dedicated_host;                 
  uint16 dedicated_port = 0;                  
  std::string connection_string;              
  std::string join_server_password;           
  std::string join_company_password;          
  bool save_config = true;                    
 
  AfterNewGRFScan()
  {
    /* Visual C++ 2015 fails compiling this line (AfterNewGRFScan::generation_seed undefined symbol)
     * if it's placed outside a member function, directly in the struct body. */
    static_assert(sizeof(generation_seed) == sizeof(_settings_game.game_creation.generation_seed));
  }
 
  virtual void OnNewGRFsScanned()
  {
    ResetGRFConfig(false);
 
    TarScanner::DoScan(TarScanner::SCENARIO);
 
    AI::Initialize();
    Game::Initialize();
 
    /* We want the new (correct) NewGRF count to survive the loading. */
    uint last_newgrf_count = _settings_client.gui.last_newgrf_count;
    LoadFromConfig();
    _settings_client.gui.last_newgrf_count = last_newgrf_count;
    /* Since the default for the palette might have changed due to
     * reading the configuration file, recalculate that now. */
    UpdateNewGRFConfigPalette();
 
    Game::Uninitialize(true);
    AI::Uninitialize(true);
    LoadFromHighScore();
    LoadHotkeysFromConfig();
    WindowDesc::LoadFromConfig();
 
    /* We have loaded the config, so we may possibly save it. */
    _save_config = save_config;
 
    /* restore saved music volume */
    MusicDriver::GetInstance()->SetVolume(_settings_client.music.music_vol);
 
    if (startyear != INVALID_YEAR) IConsoleSetSetting("game_creation.starting_year", startyear);
    if (generation_seed != GENERATE_NEW_SEED) _settings_newgame.game_creation.generation_seed = generation_seed;
 
    if (!dedicated_host.empty()) {
      _network_bind_list.clear();
      _network_bind_list.emplace_back(dedicated_host);
    }
    if (dedicated_port != 0) _settings_client.network.server_port = dedicated_port;
 
    /* initialize the ingame console */
    IConsoleInit();
    InitializeGUI();
    IConsoleCmdExec("exec scripts/autoexec.scr 0");
 
    /* Make sure _settings is filled with _settings_newgame if we switch to a game directly */
    if (_switch_mode != SM_NONE) MakeNewgameSettingsLive();
 
    if (_network_available && !connection_string.empty()) {
      LoadIntroGame();
      _switch_mode = SM_NONE;
 
      NetworkClientConnectGame(connection_string, COMPANY_NEW_COMPANY, join_server_password, join_company_password);
    }
 
    /* After the scan we're not used anymore. */
    delete this;
  }
};
 
#if defined(UNIX)
extern void DedicatedFork();
#endif
 
static const OptionData _options[] = {
   GETOPT_SHORT_VALUE('I'),
   GETOPT_SHORT_VALUE('S'),
   GETOPT_SHORT_VALUE('M'),
   GETOPT_SHORT_VALUE('m'),
   GETOPT_SHORT_VALUE('s'),
   GETOPT_SHORT_VALUE('v'),
   GETOPT_SHORT_VALUE('b'),
  GETOPT_SHORT_OPTVAL('D'),
  GETOPT_SHORT_OPTVAL('n'),
   GETOPT_SHORT_VALUE('l'),
   GETOPT_SHORT_VALUE('p'),
   GETOPT_SHORT_VALUE('P'),
#if !defined(_WIN32)
   GETOPT_SHORT_NOVAL('f'),
#endif
   GETOPT_SHORT_VALUE('r'),
   GETOPT_SHORT_VALUE('t'),
  GETOPT_SHORT_OPTVAL('d'),
   GETOPT_SHORT_NOVAL('e'),
  GETOPT_SHORT_OPTVAL('g'),
   GETOPT_SHORT_VALUE('G'),
   GETOPT_SHORT_VALUE('c'),
   GETOPT_SHORT_NOVAL('x'),
   GETOPT_SHORT_NOVAL('X'),
   GETOPT_SHORT_VALUE('q'),
   GETOPT_SHORT_NOVAL('h'),
   GETOPT_SHORT_NOVAL('Q'),
  GETOPT_END()
};
 
int openttd_main(int argc, char *argv[])
{
  std::string musicdriver;
  std::string sounddriver;
  std::string videodriver;
  std::string blitter;
  std::string graphics_set;
  std::string sounds_set;
  std::string music_set;
  Dimension resolution = {0, 0};
  std::unique_ptr<AfterNewGRFScan> scanner(new AfterNewGRFScan());
  bool dedicated = false;
  char *debuglog_conn = nullptr;
  bool only_local_path = false;
 
  extern bool _dedicated_forks;
  _dedicated_forks = false;
 
  _game_mode = GM_MENU;
  _switch_mode = SM_MENU;
 
  GetOptData mgo(argc - 1, argv + 1, _options);
  int ret = 0;
 
  int i;
  while ((i = mgo.GetOpt()) != -1) {
    switch (i) {
    case 'I': graphics_set = mgo.opt; break;
    case 'S': sounds_set = mgo.opt; break;
    case 'M': music_set = mgo.opt; break;
    case 'm': musicdriver = mgo.opt; break;
    case 's': sounddriver = mgo.opt; break;
    case 'v': videodriver = mgo.opt; break;
    case 'b': blitter = mgo.opt; break;
    case 'D':
      musicdriver = "null";
      sounddriver = "null";
      videodriver = "dedicated";
      blitter = "null";
      dedicated = true;
      SetDebugString("net=4", ShowInfo);
      if (mgo.opt != nullptr) {
        scanner->dedicated_host = ParseFullConnectionString(mgo.opt, scanner->dedicated_port);
      }
      break;
    case 'f': _dedicated_forks = true; break;
    case 'n':
      scanner->connection_string = mgo.opt; // optional IP:port#company parameter
      break;
    case 'l':
      debuglog_conn = mgo.opt;
      break;
    case 'p':
      scanner->join_server_password = mgo.opt;
      break;
    case 'P':
      scanner->join_company_password = mgo.opt;
      break;
    case 'r': ParseResolution(&resolution, mgo.opt); break;
    case 't': scanner->startyear = atoi(mgo.opt); break;
    case 'd': {
#if defined(_WIN32)
        CreateConsole();
#endif
        if (mgo.opt != nullptr) SetDebugString(mgo.opt, ShowInfo);
        break;
      }
    case 'e': _switch_mode = (_switch_mode == SM_LOAD_GAME || _switch_mode == SM_LOAD_SCENARIO ? SM_LOAD_SCENARIO : SM_EDITOR); break;
    case 'g':
      if (mgo.opt != nullptr) {
        _file_to_saveload.SetName(mgo.opt);
        bool is_scenario = _switch_mode == SM_EDITOR || _switch_mode == SM_LOAD_SCENARIO;
        _switch_mode = is_scenario ? SM_LOAD_SCENARIO : SM_LOAD_GAME;
        _file_to_saveload.SetMode(SLO_LOAD, is_scenario ? FT_SCENARIO : FT_SAVEGAME, DFT_GAME_FILE);
 
        /* if the file doesn't exist or it is not a valid savegame, let the saveload code show an error */
        auto t = _file_to_saveload.name.find_last_of('.');
        if (t != std::string::npos) {
          FiosType ft = FiosGetSavegameListCallback(SLO_LOAD, _file_to_saveload.name, _file_to_saveload.name.substr(t).c_str(), nullptr, nullptr);
          if (ft != FIOS_TYPE_INVALID) _file_to_saveload.SetMode(ft);
        }
 
        break;
      }
 
      _switch_mode = SM_NEWGAME;
      /* Give a random map if no seed has been given */
      if (scanner->generation_seed == GENERATE_NEW_SEED) {
        scanner->generation_seed = InteractiveRandom();
      }
      break;
    case 'q': {
      DeterminePaths(argv[0], only_local_path);
      if (StrEmpty(mgo.opt)) {
        ret = 1;
        return ret;
      }
 
      char title[80];
      title[0] = '\0';
      FiosGetSavegameListCallback(SLO_LOAD, mgo.opt, strrchr(mgo.opt, '.'), title, lastof(title));
 
      _load_check_data.Clear();
      SaveOrLoadResult res = SaveOrLoad(mgo.opt, SLO_CHECK, DFT_GAME_FILE, SAVE_DIR, false);
      if (res != SL_OK || _load_check_data.HasErrors()) {
        fprintf(stderr, "Failed to open savegame\n");
        if (_load_check_data.HasErrors()) {
          InitializeLanguagePacks(); // A language pack is needed for GetString()
          char buf[256];
          SetDParamStr(0, _load_check_data.error_data);
          GetString(buf, _load_check_data.error, lastof(buf));
          fprintf(stderr, "%s\n", buf);
        }
        return ret;
      }
 
      WriteSavegameInfo(title);
      return ret;
    }
    case 'Q': {
      extern int _skip_all_newgrf_scanning;
      _skip_all_newgrf_scanning += 1;
      break;
    }
    case 'G': scanner->generation_seed = strtoul(mgo.opt, nullptr, 10); break;
    case 'c': _config_file = mgo.opt; break;
    case 'x': scanner->save_config = false; break;
    case 'X': only_local_path = true; break;
    case 'h':
      i = -2; // Force printing of help.
      break;
    }
    if (i == -2) break;
  }
 
  if (i == -2 || mgo.numleft > 0) {
    /* Either the user typed '-h', they made an error, or they added unrecognized command line arguments.
     * In all cases, print the help, and exit.
     *
     * The next two functions are needed to list the graphics sets. We can't do them earlier
     * because then we cannot show it on the debug console as that hasn't been configured yet. */
    DeterminePaths(argv[0], only_local_path);
    TarScanner::DoScan(TarScanner::BASESET);
    BaseGraphics::FindSets();
    BaseSounds::FindSets();
    BaseMusic::FindSets();
    ShowHelp();
    return ret;
  }
 
  DeterminePaths(argv[0], only_local_path);
  TarScanner::DoScan(TarScanner::BASESET);
 
  if (dedicated) Debug(net, 3, "Starting dedicated server, version {}", _openttd_revision);
  if (_dedicated_forks && !dedicated) _dedicated_forks = false;
 
#if defined(UNIX)
  /* We must fork here, or we'll end up without some resources we need (like sockets) */
  if (_dedicated_forks) DedicatedFork();
#endif
 
  LoadFromConfig(true);
 
  if (resolution.width != 0) _cur_resolution = resolution;
 
  /* Limit width times height times bytes per pixel to fit a 32 bit
   * integer, This way all internal drawing routines work correctly.
   * A resolution that has one component as 0 is treated as a marker to
   * auto-detect a good window size. */
  _cur_resolution.width  = std::min(_cur_resolution.width, UINT16_MAX / 2u);
  _cur_resolution.height = std::min(_cur_resolution.height, UINT16_MAX / 2u);
 
  /* Assume the cursor starts within the game as not all video drivers
   * get an event that the cursor is within the window when it is opened.
   * Saying the cursor is there makes no visible difference as it would
   * just be out of the bounds of the window. */
  _cursor.in_window = true;
 
  /* enumerate language files */
  InitializeLanguagePacks();
 
  /* Initialize the font cache */
  InitFontCache(false);
 
  /* This must be done early, since functions use the SetWindowDirty* calls */
  InitWindowSystem();
 
  BaseGraphics::FindSets();
  if (graphics_set.empty() && !BaseGraphics::ini_set.empty()) graphics_set = BaseGraphics::ini_set;
  if (!BaseGraphics::SetSet(graphics_set)) {
    if (!graphics_set.empty()) {
      BaseGraphics::SetSet({});
 
      ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_BASE_GRAPHICS_NOT_FOUND);
      msg.SetDParamStr(0, graphics_set);
      ScheduleErrorMessage(msg);
    }
  }
 
  /* Initialize game palette */
  GfxInitPalettes();
 
  Debug(misc, 1, "Loading blitter...");
  if (blitter.empty() && !_ini_blitter.empty()) blitter = _ini_blitter;
  _blitter_autodetected = blitter.empty();
  /* Activate the initial blitter.
   * This is only some initial guess, after NewGRFs have been loaded SwitchNewGRFBlitter may switch to a different one.
   *  - Never guess anything, if the user specified a blitter. (_blitter_autodetected)
   *  - Use 32bpp blitter if baseset or 8bpp-support settings says so.
   *  - Use 8bpp blitter otherwise.
   */
  if (!_blitter_autodetected ||
      (_support8bpp != S8BPP_NONE && (BaseGraphics::GetUsedSet() == nullptr || BaseGraphics::GetUsedSet()->blitter == BLT_8BPP)) ||
      BlitterFactory::SelectBlitter("32bpp-anim") == nullptr) {
    if (BlitterFactory::SelectBlitter(blitter) == nullptr) {
      blitter.empty() ?
        usererror("Failed to autoprobe blitter") :
        usererror("Failed to select requested blitter '%s'; does it exist?", blitter.c_str());
    }
  }
 
  if (videodriver.empty() && !_ini_videodriver.empty()) videodriver = _ini_videodriver;
  DriverFactoryBase::SelectDriver(videodriver, Driver::DT_VIDEO);
 
  InitializeSpriteSorter();
 
  /* Initialize the zoom level of the screen to normal */
  _screen.zoom = ZOOM_LVL_NORMAL;
  UpdateGUIZoom();
 
  NetworkStartUp(); // initialize network-core
 
  if (debuglog_conn != nullptr && _network_available) {
    NetworkStartDebugLog(debuglog_conn);
  }
 
  if (!HandleBootstrap()) {
    ShutdownGame();
    return ret;
  }
 
  VideoDriver::GetInstance()->ClaimMousePointer();
 
  /* initialize screenshot formats */
  InitializeScreenshotFormats();
 
  BaseSounds::FindSets();
  if (sounds_set.empty() && !BaseSounds::ini_set.empty()) sounds_set = BaseSounds::ini_set;
  if (!BaseSounds::SetSet(sounds_set)) {
    if (sounds_set.empty() || !BaseSounds::SetSet({})) {
      usererror("Failed to find a sounds set. Please acquire a sounds set for OpenTTD. See section 1.4 of README.md.");
    } else {
      ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_BASE_SOUNDS_NOT_FOUND);
      msg.SetDParamStr(0, sounds_set);
      ScheduleErrorMessage(msg);
    }
  }
 
  BaseMusic::FindSets();
  if (music_set.empty() && !BaseMusic::ini_set.empty()) music_set = BaseMusic::ini_set;
  if (!BaseMusic::SetSet(music_set)) {
    if (music_set.empty() || !BaseMusic::SetSet({})) {
      usererror("Failed to find a music set. Please acquire a music set for OpenTTD. See section 1.4 of README.md.");
    } else {
      ErrorMessageData msg(STR_CONFIG_ERROR, STR_CONFIG_ERROR_INVALID_BASE_MUSIC_NOT_FOUND);
      msg.SetDParamStr(0, music_set);
      ScheduleErrorMessage(msg);
    }
  }
 
  if (sounddriver.empty() && !_ini_sounddriver.empty()) sounddriver = _ini_sounddriver;
  DriverFactoryBase::SelectDriver(sounddriver, Driver::DT_SOUND);
 
  if (musicdriver.empty() && !_ini_musicdriver.empty()) musicdriver = _ini_musicdriver;
  DriverFactoryBase::SelectDriver(musicdriver, Driver::DT_MUSIC);
 
  GenerateWorld(GWM_EMPTY, 64, 64); // Make the viewport initialization happy
  LoadIntroGame(false);
 
  CheckForMissingGlyphs();
 
  /* ScanNewGRFFiles now has control over the scanner. */
  RequestNewGRFScan(scanner.release());
 
  VideoDriver::GetInstance()->MainLoop();
 
  WaitTillSaved();
 
  /* only save config if we have to */
  if (_save_config) {
    SaveToConfig();
    SaveHotkeysToConfig();
    WindowDesc::SaveToConfig();
    SaveToHighScore();
  }
 
  /* Reset windowing system, stop drivers, free used memory, ... */
  ShutdownGame();
  return ret;
}
 
void HandleExitGameRequest()
{
  if (_game_mode == GM_MENU || _game_mode == GM_BOOTSTRAP) { // do not ask to quit on the main screen
    _exit_game = true;
  } else if (_settings_client.gui.autosave_on_exit) {
    DoExitSave();
    _exit_game = true;
  } else {
    AskExitGame();
  }
}
 
static void OnStartScenario()
{
  /* Reset engine pool to simplify changing engine NewGRFs in scenario editor. */
  EngineOverrideManager::ResetToCurrentNewGRFConfig();
 
  /* Make sure all industries were built "this year", to avoid too early closures. (#9918) */
  for (Industry *i : Industry::Iterate()) {
    i->last_prod_year = _cur_year;
  }
}
 
static void OnStartGame(bool dedicated_server)
{
  /* Update the local company for a loaded game. It is either the first available company
   * or in the case of a dedicated server, a spectator */
  SetLocalCompany(dedicated_server ? COMPANY_SPECTATOR : GetFirstPlayableCompanyID());
 
  /* Update the static game info to set the values from the new game. */
  NetworkServerUpdateGameInfo();
  /* Execute the game-start script */
  IConsoleCmdExec("exec scripts/game_start.scr 0");
}
 
static void MakeNewGameDone()
{
  SettingsDisableElrail(_settings_game.vehicle.disable_elrails);
 
  /* In a dedicated server, the server does not play */
  if (!VideoDriver::GetInstance()->HasGUI()) {
    OnStartGame(true);
    if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
    return;
  }
 
  /* Create a single company */
  DoStartupNewCompany(false);
 
  Company *c = Company::Get(COMPANY_FIRST);
  c->settings = _settings_client.company;
 
  /* Overwrite color from settings if needed
   * COLOUR_END corresponds to Random colour */
  if (_settings_client.gui.starting_colour != COLOUR_END) {
    c->colour = _settings_client.gui.starting_colour;
    ResetCompanyLivery(c);
    _company_colours[c->index] = (Colours)c->colour;
  }
 
  OnStartGame(false);
 
  InitializeRailGUI();
  InitializeRoadGUI();
 
  /* We are the server, we start a new company (not dedicated),
   * so set the default password *if* needed. */
  if (_network_server && !_settings_client.network.default_company_pass.empty()) {
    NetworkChangeCompanyPassword(_local_company, _settings_client.network.default_company_pass);
  }
 
  if (_settings_client.gui.pause_on_newgame) Command<CMD_PAUSE>::Post(PM_PAUSED_NORMAL, true);
 
  CheckEngines();
  CheckIndustries();
  MarkWholeScreenDirty();
 
  if (_network_server && !_network_dedicated) ShowClientList();
}
 
static void MakeNewGame(bool from_heightmap, bool reset_settings)
{
  _game_mode = GM_NORMAL;
  if (!from_heightmap) {
    /* "reload" command needs to know what mode we were in. */
    _file_to_saveload.SetMode(SLO_INVALID, FT_INVALID, DFT_INVALID);
  }
 
  ResetGRFConfig(true);
 
  GenerateWorldSetCallback(&MakeNewGameDone);
  GenerateWorld(from_heightmap ? GWM_HEIGHTMAP : GWM_NEWGAME, 1 << _settings_game.game_creation.map_x, 1 << _settings_game.game_creation.map_y, reset_settings);
}
 
static void MakeNewEditorWorldDone()
{
  SetLocalCompany(OWNER_NONE);
}
 
static void MakeNewEditorWorld()
{
  _game_mode = GM_EDITOR;
  /* "reload" command needs to know what mode we were in. */
  _file_to_saveload.SetMode(SLO_INVALID, FT_INVALID, DFT_INVALID);
 
  ResetGRFConfig(true);
 
  GenerateWorldSetCallback(&MakeNewEditorWorldDone);
  GenerateWorld(GWM_EMPTY, 1 << _settings_game.game_creation.map_x, 1 << _settings_game.game_creation.map_y);
}
 
bool SafeLoad(const std::string &filename, SaveLoadOperation fop, DetailedFileType dft, GameMode newgm, Subdirectory subdir, struct LoadFilter *lf = nullptr)
{
  assert(fop == SLO_LOAD);
  assert(dft == DFT_GAME_FILE || (lf == nullptr && dft == DFT_OLD_GAME_FILE));
  GameMode ogm = _game_mode;
 
  _game_mode = newgm;
 
  switch (lf == nullptr ? SaveOrLoad(filename, fop, dft, subdir) : LoadWithFilter(lf)) {
    case SL_OK: return true;
 
    case SL_REINIT:
      if (_network_dedicated) {
        /*
         * We need to reinit a network map...
         * We can't simply load the intro game here as that game has many
         * special cases which make clients desync immediately. So we fall
         * back to just generating a new game with the current settings.
         */
        Debug(net, 0, "Loading game failed, so a new (random) game will be started");
        MakeNewGame(false, true);
        return false;
      }
      if (_network_server) {
        /* We can't load the intro game as server, so disconnect first. */
        NetworkDisconnect();
      }
 
      switch (ogm) {
        default:
        case GM_MENU:   LoadIntroGame();      break;
        case GM_EDITOR: MakeNewEditorWorld(); break;
      }
      return false;
 
    default:
      _game_mode = ogm;
      return false;
  }
}
 
void SwitchToMode(SwitchMode new_mode)
{
  /* If we are saving something, the network stays in its current state */
  if (new_mode != SM_SAVE_GAME) {
    /* If the network is active, make it not-active */
    if (_networking) {
      if (_network_server && (new_mode == SM_LOAD_GAME || new_mode == SM_NEWGAME || new_mode == SM_RESTARTGAME)) {
        NetworkReboot();
      } else {
        NetworkDisconnect();
      }
    }
 
    /* If we are a server, we restart the server */
    if (_is_network_server) {
      /* But not if we are going to the menu */
      if (new_mode != SM_MENU) {
        /* check if we should reload the config */
        if (_settings_client.network.reload_cfg) {
          LoadFromConfig();
          MakeNewgameSettingsLive();
          ResetGRFConfig(false);
        }
        NetworkServerStart();
      } else {
        /* This client no longer wants to be a network-server */
        _is_network_server = false;
      }
    }
  }
 
  /* Make sure all AI controllers are gone at quitting game */
  if (new_mode != SM_SAVE_GAME) AI::KillAll();
 
  switch (new_mode) {
    case SM_EDITOR: // Switch to scenario editor
      MakeNewEditorWorld();
      break;
 
    case SM_RELOADGAME: // Reload with what-ever started the game
      if (_file_to_saveload.abstract_ftype == FT_SAVEGAME || _file_to_saveload.abstract_ftype == FT_SCENARIO) {
        /* Reload current savegame/scenario */
        _switch_mode = _game_mode == GM_EDITOR ? SM_LOAD_SCENARIO : SM_LOAD_GAME;
        SwitchToMode(_switch_mode);
        break;
      } else if (_file_to_saveload.abstract_ftype == FT_HEIGHTMAP) {
        /* Restart current heightmap */
        _switch_mode = _game_mode == GM_EDITOR ? SM_LOAD_HEIGHTMAP : SM_RESTART_HEIGHTMAP;
        SwitchToMode(_switch_mode);
        break;
      }
 
      MakeNewGame(false, new_mode == SM_NEWGAME);
      break;
 
    case SM_RESTARTGAME: // Restart --> 'Random game' with current settings
    case SM_NEWGAME: // New Game --> 'Random game'
      MakeNewGame(false, new_mode == SM_NEWGAME);
      break;
 
    case SM_LOAD_GAME: { // Load game, Play Scenario
      ResetGRFConfig(true);
      ResetWindowSystem();
 
      if (!SafeLoad(_file_to_saveload.name, _file_to_saveload.file_op, _file_to_saveload.detail_ftype, GM_NORMAL, NO_DIRECTORY)) {
        SetDParamStr(0, GetSaveLoadErrorString());
        ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
      } else {
        if (_file_to_saveload.abstract_ftype == FT_SCENARIO) {
          OnStartScenario();
        }
        OnStartGame(_network_dedicated);
        /* Decrease pause counter (was increased from opening load dialog) */
        Command<CMD_PAUSE>::Post(PM_PAUSED_SAVELOAD, false);
      }
      break;
    }
 
    case SM_RESTART_HEIGHTMAP: // Load a heightmap and start a new game from it with current settings
    case SM_START_HEIGHTMAP: // Load a heightmap and start a new game from it
      MakeNewGame(true, new_mode == SM_START_HEIGHTMAP);
      break;
 
    case SM_LOAD_HEIGHTMAP: // Load heightmap from scenario editor
      SetLocalCompany(OWNER_NONE);
 
      GenerateWorld(GWM_HEIGHTMAP, 1 << _settings_game.game_creation.map_x, 1 << _settings_game.game_creation.map_y);
      MarkWholeScreenDirty();
      break;
 
    case SM_LOAD_SCENARIO: { // Load scenario from scenario editor
      if (SafeLoad(_file_to_saveload.name, _file_to_saveload.file_op, _file_to_saveload.detail_ftype, GM_EDITOR, NO_DIRECTORY)) {
        SetLocalCompany(OWNER_NONE);
        _settings_newgame.game_creation.starting_year = _cur_year;
        /* Cancel the saveload pausing */
        Command<CMD_PAUSE>::Post(PM_PAUSED_SAVELOAD, false);
      } else {
        SetDParamStr(0, GetSaveLoadErrorString());
        ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
      }
      break;
    }
 
    case SM_JOIN_GAME: // Join a multiplayer game
      LoadIntroGame();
      NetworkClientJoinGame();
      break;
 
    case SM_MENU: // Switch to game intro menu
      LoadIntroGame();
      if (BaseSounds::ini_set.empty() && BaseSounds::GetUsedSet()->fallback && SoundDriver::GetInstance()->HasOutput()) {
        ShowErrorMessage(STR_WARNING_FALLBACK_SOUNDSET, INVALID_STRING_ID, WL_CRITICAL);
        BaseSounds::ini_set = BaseSounds::GetUsedSet()->name;
      }
      break;
 
    case SM_SAVE_GAME: // Save game.
      /* Make network saved games on pause compatible to singleplayer mode */
      if (SaveOrLoad(_file_to_saveload.name, SLO_SAVE, DFT_GAME_FILE, NO_DIRECTORY) != SL_OK) {
        SetDParamStr(0, GetSaveLoadErrorString());
        ShowErrorMessage(STR_JUST_RAW_STRING, INVALID_STRING_ID, WL_ERROR);
      } else {
        CloseWindowById(WC_SAVELOAD, 0);
      }
      break;
 
    case SM_SAVE_HEIGHTMAP: // Save heightmap.
      MakeHeightmapScreenshot(_file_to_saveload.name.c_str());
      CloseWindowById(WC_SAVELOAD, 0);
      break;
 
    case SM_GENRANDLAND: // Generate random land within scenario editor
      SetLocalCompany(OWNER_NONE);
      GenerateWorld(GWM_RANDOM, 1 << _settings_game.game_creation.map_x, 1 << _settings_game.game_creation.map_y);
      /* XXX: set date */
      MarkWholeScreenDirty();
      break;
 
    default: NOT_REACHED();
  }
}
 
 
static void CheckCaches()
{
  /* Return here so it is easy to add checks that are run
   * always to aid testing of caches. */
  if (_debug_desync_level <= 1) return;
 
  /* Check the town caches. */
  std::vector<TownCache> old_town_caches;
  for (const Town *t : Town::Iterate()) {
    old_town_caches.push_back(t->cache);
  }
 
  extern void RebuildTownCaches();
  RebuildTownCaches();
  RebuildSubsidisedSourceAndDestinationCache();
 
  uint i = 0;
  for (Town *t : Town::Iterate()) {
    if (MemCmpT(old_town_caches.data() + i, &t->cache) != 0) {
      Debug(desync, 2, "town cache mismatch: town {}", t->index);
    }
    i++;
  }
 
  /* Check company infrastructure cache. */
  std::vector<CompanyInfrastructure> old_infrastructure;
  for (const Company *c : Company::Iterate()) old_infrastructure.push_back(c->infrastructure);
 
  extern void AfterLoadCompanyStats();
  AfterLoadCompanyStats();
 
  i = 0;
  for (const Company *c : Company::Iterate()) {
    if (MemCmpT(old_infrastructure.data() + i, &c->infrastructure) != 0) {
      Debug(desync, 2, "infrastructure cache mismatch: company {}", c->index);
    }
    i++;
  }
 
  /* Strict checking of the road stop cache entries */
  for (const RoadStop *rs : RoadStop::Iterate()) {
    if (IsStandardRoadStopTile(rs->xy)) continue;
 
    assert(rs->GetEntry(DIAGDIR_NE) != rs->GetEntry(DIAGDIR_NW));
    rs->GetEntry(DIAGDIR_NE)->CheckIntegrity(rs);
    rs->GetEntry(DIAGDIR_NW)->CheckIntegrity(rs);
  }
 
  for (Vehicle *v : Vehicle::Iterate()) {
    extern void FillNewGRFVehicleCache(const Vehicle *v);
    if (v != v->First() || v->vehstatus & VS_CRASHED || !v->IsPrimaryVehicle()) continue;
 
    uint length = 0;
    for (const Vehicle *u = v; u != nullptr; u = u->Next()) length++;
 
    NewGRFCache        *grf_cache = CallocT<NewGRFCache>(length);
    VehicleCache       *veh_cache = CallocT<VehicleCache>(length);
    GroundVehicleCache *gro_cache = CallocT<GroundVehicleCache>(length);
    TrainCache         *tra_cache = CallocT<TrainCache>(length);
 
    length = 0;
    for (const Vehicle *u = v; u != nullptr; u = u->Next()) {
      FillNewGRFVehicleCache(u);
      grf_cache[length] = u->grf_cache;
      veh_cache[length] = u->vcache;
      switch (u->type) {
        case VEH_TRAIN:
          gro_cache[length] = Train::From(u)->gcache;
          tra_cache[length] = Train::From(u)->tcache;
          break;
        case VEH_ROAD:
          gro_cache[length] = RoadVehicle::From(u)->gcache;
          break;
        default:
          break;
      }
      length++;
    }
 
    switch (v->type) {
      case VEH_TRAIN:    Train::From(v)->ConsistChanged(CCF_TRACK); break;
      case VEH_ROAD:     RoadVehUpdateCache(RoadVehicle::From(v)); break;
      case VEH_AIRCRAFT: UpdateAircraftCache(Aircraft::From(v));   break;
      case VEH_SHIP:     Ship::From(v)->UpdateCache();             break;
      default: break;
    }
 
    length = 0;
    for (const Vehicle *u = v; u != nullptr; u = u->Next()) {
      FillNewGRFVehicleCache(u);
      if (memcmp(&grf_cache[length], &u->grf_cache, sizeof(NewGRFCache)) != 0) {
        Debug(desync, 2, "newgrf cache mismatch: type {}, vehicle {}, company {}, unit number {}, wagon {}", v->type, v->index, v->owner, v->unitnumber, length);
      }
      if (memcmp(&veh_cache[length], &u->vcache, sizeof(VehicleCache)) != 0) {
        Debug(desync, 2, "vehicle cache mismatch: type {}, vehicle {}, company {}, unit number {}, wagon {}", v->type, v->index, v->owner, v->unitnumber, length);
      }
      switch (u->type) {
        case VEH_TRAIN:
          if (memcmp(&gro_cache[length], &Train::From(u)->gcache, sizeof(GroundVehicleCache)) != 0) {
            Debug(desync, 2, "train ground vehicle cache mismatch: vehicle {}, company {}, unit number {}, wagon {}", v->index, v->owner, v->unitnumber, length);
          }
          if (memcmp(&tra_cache[length], &Train::From(u)->tcache, sizeof(TrainCache)) != 0) {
            Debug(desync, 2, "train cache mismatch: vehicle {}, company {}, unit number {}, wagon {}", v->index, v->owner, v->unitnumber, length);
          }
          break;
        case VEH_ROAD:
          if (memcmp(&gro_cache[length], &RoadVehicle::From(u)->gcache, sizeof(GroundVehicleCache)) != 0) {
            Debug(desync, 2, "road vehicle ground vehicle cache mismatch: vehicle {}, company {}, unit number {}, wagon {}", v->index, v->owner, v->unitnumber, length);
          }
          break;
        default:
          break;
      }
      length++;
    }
 
    free(grf_cache);
    free(veh_cache);
    free(gro_cache);
    free(tra_cache);
  }
 
  /* Check whether the caches are still valid */
  for (Vehicle *v : Vehicle::Iterate()) {
    byte buff[sizeof(VehicleCargoList)];
    memcpy(buff, &v->cargo, sizeof(VehicleCargoList));
    v->cargo.InvalidateCache();
    assert(memcmp(&v->cargo, buff, sizeof(VehicleCargoList)) == 0);
  }
 
  /* Backup stations_near */
  std::vector<StationList> old_town_stations_near;
  for (Town *t : Town::Iterate()) old_town_stations_near.push_back(t->stations_near);
 
  std::vector<StationList> old_industry_stations_near;
  for (Industry *ind : Industry::Iterate())  old_industry_stations_near.push_back(ind->stations_near);
 
  for (Station *st : Station::Iterate()) {
    for (CargoID c = 0; c < NUM_CARGO; c++) {
      byte buff[sizeof(StationCargoList)];
      memcpy(buff, &st->goods[c].cargo, sizeof(StationCargoList));
      st->goods[c].cargo.InvalidateCache();
      assert(memcmp(&st->goods[c].cargo, buff, sizeof(StationCargoList)) == 0);
    }
 
    /* Check docking tiles */
    TileArea ta;
    std::map<TileIndex, bool> docking_tiles;
    for (TileIndex tile : st->docking_station) {
      ta.Add(tile);
      docking_tiles[tile] = IsDockingTile(tile);
    }
    UpdateStationDockingTiles(st);
    if (ta.tile != st->docking_station.tile || ta.w != st->docking_station.w || ta.h != st->docking_station.h) {
      Debug(desync, 2, "station docking mismatch: station {}, company {}", st->index, st->owner);
    }
    for (TileIndex tile : ta) {
      if (docking_tiles[tile] != IsDockingTile(tile)) {
        Debug(desync, 2, "docking tile mismatch: tile {}", tile);
      }
    }
 
    /* Check industries_near */
    IndustryList industries_near = st->industries_near;
    st->RecomputeCatchment();
    if (st->industries_near != industries_near) {
      Debug(desync, 2, "station industries near mismatch: station {}", st->index);
    }
  }
 
  /* Check stations_near */
  i = 0;
  for (Town *t : Town::Iterate()) {
    if (t->stations_near != old_town_stations_near[i]) {
      Debug(desync, 2, "town stations near mismatch: town {}", t->index);
    }
    i++;
  }
  i = 0;
  for (Industry *ind : Industry::Iterate()) {
    if (ind->stations_near != old_industry_stations_near[i]) {
      Debug(desync, 2, "industry stations near mismatch: industry {}", ind->index);
    }
    i++;
  }
}
 
void StateGameLoop()
{
  if (!_networking || _network_server) {
    StateGameLoop_LinkGraphPauseControl();
  }
 
  /* Don't execute the state loop during pause or when modal windows are open. */
  if (_pause_mode != PM_UNPAUSED || HasModalProgress()) {
    PerformanceMeasurer::Paused(PFE_GAMELOOP);
    PerformanceMeasurer::Paused(PFE_GL_ECONOMY);
    PerformanceMeasurer::Paused(PFE_GL_TRAINS);
    PerformanceMeasurer::Paused(PFE_GL_ROADVEHS);
    PerformanceMeasurer::Paused(PFE_GL_SHIPS);
    PerformanceMeasurer::Paused(PFE_GL_AIRCRAFT);
    PerformanceMeasurer::Paused(PFE_GL_LANDSCAPE);
 
    if (!HasModalProgress()) UpdateLandscapingLimits();
#ifndef DEBUG_DUMP_COMMANDS
    Game::GameLoop();
#endif
    return;
  }
 
  PerformanceMeasurer framerate(PFE_GAMELOOP);
  PerformanceAccumulator::Reset(PFE_GL_LANDSCAPE);
 
  Layouter::ReduceLineCache();
 
  if (_game_mode == GM_EDITOR) {
    BasePersistentStorageArray::SwitchMode(PSM_ENTER_GAMELOOP);
    RunTileLoop();
    CallVehicleTicks();
    CallLandscapeTick();
    BasePersistentStorageArray::SwitchMode(PSM_LEAVE_GAMELOOP);
    UpdateLandscapingLimits();
 
    CallWindowGameTickEvent();
    NewsLoop();
  } else {
    if (_debug_desync_level > 2 && _date_fract == 0 && (_date & 0x1F) == 0) {
      /* Save the desync savegame if needed. */
      char name[MAX_PATH];
      seprintf(name, lastof(name), "dmp_cmds_%08x_%08x.sav", _settings_game.game_creation.generation_seed, _date);
      SaveOrLoad(name, SLO_SAVE, DFT_GAME_FILE, AUTOSAVE_DIR, false);
    }
 
    CheckCaches();
 
    /* All these actions has to be done from OWNER_NONE
     *  for multiplayer compatibility */
    Backup<CompanyID> cur_company(_current_company, OWNER_NONE, FILE_LINE);
 
    BasePersistentStorageArray::SwitchMode(PSM_ENTER_GAMELOOP);
    AnimateAnimatedTiles();
    IncreaseDate();
    RunTileLoop();
    CallVehicleTicks();
    CallLandscapeTick();
    BasePersistentStorageArray::SwitchMode(PSM_LEAVE_GAMELOOP);
 
#ifndef DEBUG_DUMP_COMMANDS
    {
      PerformanceMeasurer framerate(PFE_ALLSCRIPTS);
      AI::GameLoop();
      Game::GameLoop();
    }
#endif
    UpdateLandscapingLimits();
 
    CallWindowGameTickEvent();
    NewsLoop();
    cur_company.Restore();
  }
 
  assert(IsLocalCompany());
}
 
static void DoAutosave()
{
  static FiosNumberedSaveName _autosave_ctr("autosave");
  DoAutoOrNetsave(_autosave_ctr);
}
 
bool RequestNewGRFScan(NewGRFScanCallback *callback)
{
  if (_request_newgrf_scan) return false;
 
  _request_newgrf_scan = true;
  _request_newgrf_scan_callback = callback;
  return true;
}
 
void GameLoop()
{
  if (_game_mode == GM_BOOTSTRAP) {
    /* Check for UDP stuff */
    if (_network_available) NetworkBackgroundLoop();
    return;
  }
 
  if (_request_newgrf_scan) {
    ScanNewGRFFiles(_request_newgrf_scan_callback);
    _request_newgrf_scan = false;
    _request_newgrf_scan_callback = nullptr;
    /* In case someone closed the game during our scan, don't do anything else. */
    if (_exit_game) return;
  }
 
  ProcessAsyncSaveFinish();
 
  /* autosave game? */
  if (_do_autosave) {
    DoAutosave();
    _do_autosave = false;
    SetWindowDirty(WC_STATUS_BAR, 0);
  }
 
  /* switch game mode? */
  if (_switch_mode != SM_NONE && !HasModalProgress()) {
    SwitchToMode(_switch_mode);
    _switch_mode = SM_NONE;
  }
 
  IncreaseSpriteLRU();
 
  /* Check for UDP stuff */
  if (_network_available) NetworkBackgroundLoop();
 
  DebugSendRemoteMessages();
 
  if (_networking && !HasModalProgress()) {
    /* Multiplayer */
    NetworkGameLoop();
  } else {
    if (_network_reconnect > 0 && --_network_reconnect == 0) {
      /* This means that we want to reconnect to the last host
       * We do this here, because it means that the network is really closed */
      NetworkClientConnectGame(_settings_client.network.last_joined, COMPANY_SPECTATOR);
    }
    /* Singleplayer */
    StateGameLoop();
  }
 
  if (!_pause_mode && HasBit(_display_opt, DO_FULL_ANIMATION)) DoPaletteAnimations();
 
  SoundDriver::GetInstance()->MainLoop();
  MusicLoop();
}