// Emacs style mode select	 -*- C++ -*- 
//-----------------------------------------------------------------------------
//
// $Id:$
//
// Copyright (C) 1993-1996 by id Software, Inc.
//
// This source is available for distribution and/or modification
// only under the terms of the DOOM Source Code License as
// published by id Software. All rights reserved.
//
// The source is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
// for more details.
//
// $Log:$
//
// DESCRIPTION:
//		DOOM main program (D_DoomMain) and game loop (D_DoomLoop),
//		plus functions to determine game mode (shareware, registered),
//		parse command line parameters, configure game parameters (turbo),
//		and call the startup functions.
//
//-----------------------------------------------------------------------------

// HEADER FILES ------------------------------------------------------------

#ifdef _WIN32
#include <direct.h>
#define mkdir(a,b) _mkdir (a)
#else
#include <sys/stat.h>
#endif

#ifdef HAVE_FPU_CONTROL
#include <fpu_control.h>
#endif
#include <float.h>

#ifdef unix
#include <unistd.h>
#endif

#include <time.h>
#include <math.h>
#include <assert.h>
#include <sys/stat.h>

#include "doomerrors.h"

#include "d_gui.h"
#include "m_random.h"
#include "doomdef.h"
#include "doomstat.h"
#include "gstrings.h"
#include "w_wad.h"
#include "s_sound.h"
#include "v_video.h"
#include "f_finale.h"
#include "f_wipe.h"
#include "m_argv.h"
#include "m_misc.h"
#include "m_menu.h"
#include "c_console.h"
#include "c_dispatch.h"
#include "i_system.h"
#include "i_sound.h"
#include "i_video.h"
#include "g_game.h"
#include "hu_stuff.h"
#include "wi_stuff.h"
#include "st_stuff.h"
#include "am_map.h"
#include "p_setup.h"
#include "r_local.h"
#include "r_sky.h"
#include "d_main.h"
#include "d_dehacked.h"
#include "cmdlib.h"
#include "s_sound.h"
#include "m_swap.h"
#include "v_text.h"
#include "gi.h"
#include "b_bot.h"		//Added by MC:
#include "stats.h"
#include "gameconfigfile.h"
#include "sbar.h"
#include "decallib.h"
#include "r_polymost.h"
#include "version.h"
#include "v_text.h"
#include "st_start.h"
#include "templates.h"
#include "teaminfo.h"
#include "hardware.h"
#include "sbarinfo.h"
#include "d_net.h"
#include "g_level.h"
#include "d_event.h"
#include "d_netinf.h"
#include "v_palette.h"
#include "m_cheat.h"
#include "compatibility.h"
#include "m_joy.h"
#include "sc_man.h"
#include "resourcefiles/resourcefile.h"

EXTERN_CVAR(Bool, hud_althud)
void DrawHUD();

// MACROS ------------------------------------------------------------------

// TYPES -------------------------------------------------------------------

// EXTERNAL FUNCTION PROTOTYPES --------------------------------------------

extern void M_RestoreMode ();
extern void M_SetDefaultMode ();
extern void R_ExecuteSetViewSize ();
extern void G_NewInit ();
extern void SetupPlayerClasses ();
extern bool CheckCheatmode ();
const IWADInfo *D_FindIWAD(TArray<FString> &wadfiles, const char *iwad, const char *basewad);

// PUBLIC FUNCTION PROTOTYPES ----------------------------------------------

void D_CheckNetGame ();
void D_ProcessEvents ();
void G_BuildTiccmd (ticcmd_t* cmd);
void D_DoAdvanceDemo ();
void D_AddWildFile (const char *pattern);

// PRIVATE FUNCTION PROTOTYPES ---------------------------------------------

void D_DoomLoop ();
static const char *BaseFileSearch (const char *file, const char *ext, bool lookfirstinprogdir=false);

// EXTERNAL DATA DECLARATIONS ----------------------------------------------

EXTERN_CVAR (Float, turbo)
EXTERN_CVAR (Bool, freelook)
EXTERN_CVAR (Float, m_pitch)
EXTERN_CVAR (Float, m_yaw)
EXTERN_CVAR (Bool, invertmouse)
EXTERN_CVAR (Bool, lookstrafe)
EXTERN_CVAR (Int, screenblocks)
EXTERN_CVAR (Bool, sv_cheats)
EXTERN_CVAR (Bool, sv_unlimited_pickup)

extern int testingmode;
extern bool setmodeneeded;
extern bool netdemo;
extern int NewWidth, NewHeight, NewBits, DisplayBits;
EXTERN_CVAR (Bool, st_scale)
extern bool gameisdead;
extern bool demorecording;
extern bool M_DemoNoPlay;	// [RH] if true, then skip any demos in the loop
extern bool insave;

extern cycle_t WallCycles, PlaneCycles, MaskedCycles, WallScanCycles;

// PUBLIC DATA DEFINITIONS -------------------------------------------------

CUSTOM_CVAR (Int, fraglimit, 0, CVAR_SERVERINFO)
{
	// Check for the fraglimit being hit because the fraglimit is being
	// lowered below somebody's current frag count.
	if (deathmatch && self > 0)
	{
		for (int i = 0; i < MAXPLAYERS; ++i)
		{
			if (playeringame[i] && self <= D_GetFragCount(&players[i]))
			{
				Printf ("%s\n", GStrings("TXT_FRAGLIMIT"));
				G_ExitLevel (0, false);
				break;
			}
		}
	}
}

CVAR (Float, timelimit, 0.f, CVAR_SERVERINFO);
CVAR (Int, wipetype, 1, CVAR_ARCHIVE);
CVAR (Int, snd_drawoutput, 0, 0);

bool DrawFSHUD;				// [RH] Draw fullscreen HUD?
TArray<FString> allwads;
bool devparm;				// started game with -devparm
const char *D_DrawIcon;	// [RH] Patch name of icon to draw on next refresh
int NoWipe;				// [RH] Allow wipe? (Needs to be set each time)
bool singletics = false;	// debug flag to cancel adaptiveness
FString startmap;
bool autostart;
bool advancedemo;
FILE *debugfile;
event_t events[MAXEVENTS];
int eventhead;
int eventtail;
gamestate_t wipegamestate = GS_DEMOSCREEN;	// can be -1 to force a wipe
bool PageBlank;
FTexture *Page;
FTexture *Advisory;

cycle_t FrameCycles;


// PRIVATE DATA DEFINITIONS ------------------------------------------------

static int demosequence;
static int pagetic;

// CODE --------------------------------------------------------------------

//==========================================================================
//
// D_ProcessEvents
//
// Send all the events of the given timestamp down the responder chain.
// Events are asynchronous inputs generally generated by the game user.
// Events can be discarded if no responder claims them
//
//==========================================================================

void D_ProcessEvents (void)
{
	event_t *ev;
		
	// [RH] If testing mode, do not accept input until test is over
	if (testingmode)
	{
		if (testingmode == 1)
		{
			M_SetDefaultMode ();
		}
		else if (testingmode <= I_GetTime(false))
		{
			M_RestoreMode ();
		}
		return;
	}

	for (; eventtail != eventhead ; eventtail = (eventtail+1)&(MAXEVENTS-1))
	{
		ev = &events[eventtail];
		if (ev->type == EV_None)
			continue;
		if (ev->type == EV_DeviceChange)
			UpdateJoystickMenu(I_UpdateDeviceList());
		if (C_Responder (ev))
			continue;				// console ate the event
		if (M_Responder (ev))
			continue;				// menu ate the event
		if (testpolymost)
			Polymost_Responder (ev);
		G_Responder (ev);
	}
}

//==========================================================================
//
// D_PostEvent
//
// Called by the I/O functions when input is detected.
//
//==========================================================================

void D_PostEvent (const event_t *ev)
{
	// Do not post duplicate consecutive EV_DeviceChange events.
	if (ev->type == EV_DeviceChange && events[eventhead].type == EV_DeviceChange)
	{
		return;
	}
	events[eventhead] = *ev;
	if (ev->type == EV_Mouse && !testpolymost && !paused && menuactive == MENU_Off &&
		ConsoleState != c_down && ConsoleState != c_falling)
	{
		if (Button_Mlook.bDown || freelook)
		{
			int look = int(ev->y * m_pitch * mouse_sensitivity * 16.0);
			if (invertmouse)
				look = -look;
			G_AddViewPitch (look);
			events[eventhead].y = 0;
		}
		if (!Button_Strafe.bDown && !lookstrafe)
		{
			G_AddViewAngle (int(ev->x * m_yaw * mouse_sensitivity * 8.0));
			events[eventhead].x = 0;
		}
		if ((events[eventhead].x | events[eventhead].y) == 0)
		{
			return;
		}
	}
	eventhead = (eventhead+1)&(MAXEVENTS-1);
}

//==========================================================================
//
// D_RemoveNextCharEvent
//
// Removes the next EV_GUI_Char event in the input queue. Used by the menu,
// since it (generally) consumes EV_GUI_KeyDown events and not EV_GUI_Char
// events, and it needs to ensure that there is no left over input when it's
// done. If there are multiple EV_GUI_KeyDowns before the EV_GUI_Char, then
// there are dead chars involved, so those should be removed, too. We do
// this by changing the message type to EV_None rather than by actually
// removing the event from the queue.
// 
//==========================================================================

void D_RemoveNextCharEvent()
{
	assert(events[eventtail].type == EV_GUI_Event && events[eventtail].subtype == EV_GUI_KeyDown);
	for (int evnum = eventtail; evnum != eventhead; evnum = (evnum+1) & (MAXEVENTS-1))
	{
		event_t *ev = &events[evnum];
		if (ev->type != EV_GUI_Event)
			break;
		if (ev->subtype == EV_GUI_KeyDown || ev->subtype == EV_GUI_Char)
		{
			ev->type = EV_None;
			if (ev->subtype == EV_GUI_Char)
				break;
		}
		else
		{
			break;
		}
	}
}

//==========================================================================
//
// CVAR dmflags
//
//==========================================================================

CUSTOM_CVAR (Int, dmflags, 0, CVAR_SERVERINFO)
{
	// In case DF_NO_FREELOOK was changed, reinitialize the sky
	// map. (If no freelook, then no need to stretch the sky.)
	if (sky1texture.isValid())
		R_InitSkyMap ();

	if (self & DF_NO_FREELOOK)
	{
		Net_WriteByte (DEM_CENTERVIEW);
	}
	// If nofov is set, force everybody to the arbitrator's FOV.
	if ((self & DF_NO_FOV) && consoleplayer == Net_Arbitrator)
	{
		BYTE fov;

		Net_WriteByte (DEM_FOV);

		// If the game is started with DF_NO_FOV set, the arbitrator's
		// DesiredFOV will not be set when this callback is run, so
		// be sure not to transmit a 0 FOV.
		fov = (BYTE)players[consoleplayer].DesiredFOV;
		if (fov == 0)
		{
			fov = 90;
		}
		Net_WriteByte (fov);
	}
}

CVAR (Flag, sv_nohealth,		dmflags, DF_NO_HEALTH);
CVAR (Flag, sv_noitems,			dmflags, DF_NO_ITEMS);
CVAR (Flag, sv_weaponstay,		dmflags, DF_WEAPONS_STAY);
CVAR (Flag, sv_falldamage,		dmflags, DF_FORCE_FALLINGHX);
CVAR (Flag, sv_oldfalldamage,	dmflags, DF_FORCE_FALLINGZD);
CVAR (Flag, sv_samelevel,		dmflags, DF_SAME_LEVEL);
CVAR (Flag, sv_spawnfarthest,	dmflags, DF_SPAWN_FARTHEST);
CVAR (Flag, sv_forcerespawn,	dmflags, DF_FORCE_RESPAWN);
CVAR (Flag, sv_noarmor,			dmflags, DF_NO_ARMOR);
CVAR (Flag, sv_noexit,			dmflags, DF_NO_EXIT);
CVAR (Flag, sv_infiniteammo,	dmflags, DF_INFINITE_AMMO);
CVAR (Flag, sv_nomonsters,		dmflags, DF_NO_MONSTERS);
CVAR (Flag, sv_monsterrespawn,	dmflags, DF_MONSTERS_RESPAWN);
CVAR (Flag, sv_itemrespawn,		dmflags, DF_ITEMS_RESPAWN);
CVAR (Flag, sv_fastmonsters,	dmflags, DF_FAST_MONSTERS);
CVAR (Flag, sv_nojump,			dmflags, DF_NO_JUMP);
CVAR (Flag, sv_allowjump,		dmflags, DF_YES_JUMP);
CVAR (Flag, sv_nofreelook,		dmflags, DF_NO_FREELOOK);
CVAR (Flag, sv_respawnsuper,	dmflags, DF_RESPAWN_SUPER);
CVAR (Flag, sv_nofov,			dmflags, DF_NO_FOV);
CVAR (Flag, sv_noweaponspawn,	dmflags, DF_NO_COOP_WEAPON_SPAWN);
CVAR (Flag, sv_nocrouch,		dmflags, DF_NO_CROUCH);
CVAR (Flag, sv_allowcrouch,		dmflags, DF_YES_CROUCH);

//==========================================================================
//
// CVAR dmflags2
//
// [RH] From Skull Tag. Some of these were already done as separate cvars
// (such as bfgaiming), but I collected them here like Skull Tag does.
//
//==========================================================================

CUSTOM_CVAR (Int, dmflags2, 0, CVAR_SERVERINFO)
{
	// Stop the automap if we aren't allowed to use it.
	if ((self & DF2_NO_AUTOMAP) && automapactive)
		AM_Stop ();

	for (int i = 0; i < MAXPLAYERS; i++)
	{
		player_t *p = &players[i];

		if (!playeringame[i])
			continue;

		// Revert our view to our own eyes if spying someone else.
		if (self & DF2_DISALLOW_SPYING)
		{
			// The player isn't looking through its own eyes, so make it.
			if (p->camera != p->mo)
			{
				p->camera = p->mo;

				S_UpdateSounds (p->camera);
				StatusBar->AttachToPlayer (p);

				if (demoplayback || multiplayer)
					StatusBar->ShowPlayerName ();
			}
		}

		// Come out of chasecam mode if we're not allowed to use chasecam.
		if (!(dmflags2 & DF2_CHASECAM) && !G_SkillProperty (SKILLP_DisableCheats) && !sv_cheats)
		{
			// Take us out of chasecam mode only.
			if (p->cheats & CF_CHASECAM)
				cht_DoCheat (p, CHT_CHASECAM);
		}
	}
}

CVAR (Flag, sv_weapondrop,			dmflags2, DF2_YES_WEAPONDROP);
CVAR (Flag, sv_noteamswitch,		dmflags2, DF2_NO_TEAM_SWITCH);
CVAR (Flag, sv_doubleammo,			dmflags2, DF2_YES_DOUBLEAMMO);
CVAR (Flag, sv_degeneration,		dmflags2, DF2_YES_DEGENERATION);
CVAR (Flag, sv_nobfgaim,			dmflags2, DF2_NO_FREEAIMBFG);
CVAR (Flag, sv_barrelrespawn,		dmflags2, DF2_BARRELS_RESPAWN);
CVAR (Flag, sv_keepfrags,			dmflags2, DF2_YES_KEEPFRAGS);
CVAR (Flag, sv_norespawn,			dmflags2, DF2_NO_RESPAWN);
CVAR (Flag, sv_losefrag,			dmflags2, DF2_YES_LOSEFRAG);
CVAR (Flag, sv_respawnprotect,		dmflags2, DF2_YES_RESPAWN_INVUL);
CVAR (Flag, sv_samespawnspot,		dmflags2, DF2_SAME_SPAWN_SPOT);
CVAR (Flag, sv_infiniteinventory,	dmflags2, DF2_INFINITE_INVENTORY);
CVAR (Flag, sv_killallmonsters,		dmflags2, DF2_KILL_MONSTERS);
CVAR (Flag, sv_noautomap,			dmflags2, DF2_NO_AUTOMAP);
CVAR (Flag, sv_noautomapallies,		dmflags2, DF2_NO_AUTOMAP_ALLIES);
CVAR (Flag, sv_disallowspying,		dmflags2, DF2_DISALLOW_SPYING);
CVAR (Flag, sv_chasecam,			dmflags2, DF2_CHASECAM);
CVAR (Flag, sv_disallowsuicide,		dmflags2, DF2_NOSUICIDE);
CVAR (Flag, sv_noautoaim,			dmflags2, DF2_NOAUTOAIM);

//==========================================================================
//
// CVAR compatflags
//
//==========================================================================

int i_compatflags;	// internal compatflags composed from the compatflags CVAR and MAPINFO settings
int ii_compatflags, ib_compatflags;

EXTERN_CVAR(Int, compatmode)

static int GetCompatibility(int mask)
{
	if (level.info == NULL) return mask;
	else return (mask & ~level.info->compatmask) | (level.info->compatflags & level.info->compatmask);
}

CUSTOM_CVAR (Int, compatflags, 0, CVAR_ARCHIVE|CVAR_SERVERINFO)
{
	i_compatflags = GetCompatibility(self) | ii_compatflags;
}

CUSTOM_CVAR(Int, compatmode, 0, CVAR_ARCHIVE|CVAR_NOINITCALL)
{
	int v;

	switch (self)
	{
	default:
	case 0:
		v = 0;
		break;

	case 1:	// Doom2.exe compatible with a few relaxed settings
		v = COMPATF_SHORTTEX|COMPATF_STAIRINDEX|COMPATF_USEBLOCKING|COMPATF_NODOORLIGHT|COMPATF_SPRITESORT|
			COMPATF_TRACE|COMPATF_MISSILECLIP|COMPATF_SOUNDTARGET|COMPATF_DEHHEALTH|COMPATF_CROSSDROPOFF;
		break;

	case 2:	// same as 1 but stricter (NO_PASSMOBJ and INVISIBILITY are also set)
		v = COMPATF_SHORTTEX|COMPATF_STAIRINDEX|COMPATF_USEBLOCKING|COMPATF_NODOORLIGHT|COMPATF_SPRITESORT|
			COMPATF_TRACE|COMPATF_MISSILECLIP|COMPATF_SOUNDTARGET|COMPATF_NO_PASSMOBJ|COMPATF_LIMITPAIN|
			COMPATF_DEHHEALTH|COMPATF_INVISIBILITY|COMPATF_CROSSDROPOFF|COMPATF_CORPSEGIBS;
		break;

	case 3: // Boom compat mode
		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL;
		break;

	case 4: // Old ZDoom compat mode
		v = COMPATF_SOUNDTARGET;
		break;

	case 5: // MBF compat mode
		v = COMPATF_TRACE|COMPATF_SOUNDTARGET|COMPATF_BOOMSCROLL|COMPATF_MUSHROOM|
			COMPATF_MBFMONSTERMOVE|COMPATF_NOBLOCKFRIENDS;
		break;

	}
	compatflags = v;
}

CVAR (Flag, compat_shortTex,	compatflags, COMPATF_SHORTTEX);
CVAR (Flag, compat_stairs,		compatflags, COMPATF_STAIRINDEX);
CVAR (Flag, compat_limitpain,	compatflags, COMPATF_LIMITPAIN);
CVAR (Flag, compat_silentpickup,compatflags, COMPATF_SILENTPICKUP);
CVAR (Flag, compat_nopassover,	compatflags, COMPATF_NO_PASSMOBJ);
CVAR (Flag, compat_soundslots,	compatflags, COMPATF_MAGICSILENCE);
CVAR (Flag, compat_wallrun,		compatflags, COMPATF_WALLRUN);
CVAR (Flag, compat_notossdrops,	compatflags, COMPATF_NOTOSSDROPS);
CVAR (Flag, compat_useblocking,	compatflags, COMPATF_USEBLOCKING);
CVAR (Flag, compat_nodoorlight,	compatflags, COMPATF_NODOORLIGHT);
CVAR (Flag, compat_ravenscroll,	compatflags, COMPATF_RAVENSCROLL);
CVAR (Flag, compat_soundtarget,	compatflags, COMPATF_SOUNDTARGET);
CVAR (Flag, compat_dehhealth,	compatflags, COMPATF_DEHHEALTH);
CVAR (Flag, compat_trace,		compatflags, COMPATF_TRACE);
CVAR (Flag, compat_dropoff,		compatflags, COMPATF_DROPOFF);
CVAR (Flag, compat_boomscroll,	compatflags, COMPATF_BOOMSCROLL);
CVAR (Flag, compat_invisibility,compatflags, COMPATF_INVISIBILITY);
CVAR (Flag, compat_silentinstantfloors,compatflags, COMPATF_SILENT_INSTANT_FLOORS);
CVAR (Flag, compat_sectorsounds,compatflags, COMPATF_SECTORSOUNDS);
CVAR (Flag, compat_missileclip,	compatflags, COMPATF_MISSILECLIP);
CVAR (Flag, compat_crossdropoff,compatflags, COMPATF_CROSSDROPOFF);
CVAR (Flag, compat_anybossdeath,compatflags, COMPATF_ANYBOSSDEATH);
CVAR (Flag, compat_minotaur,	compatflags, COMPATF_MINOTAUR);
CVAR (Flag, compat_mushroom,	compatflags, COMPATF_MUSHROOM);
CVAR (Flag, compat_mbfmonstermove,compatflags, COMPATF_MBFMONSTERMOVE);
CVAR (Flag, compat_corpsegibs,	compatflags, COMPATF_CORPSEGIBS);
CVAR (Flag, compat_noblockfriends,compatflags,COMPATF_NOBLOCKFRIENDS);
CVAR (Flag, compat_spritesort,	compatflags,COMPATF_SPRITESORT);

//==========================================================================
//
// D_Display
//
// Draw current display, possibly wiping it from the previous
//
//==========================================================================

void D_Display ()
{
	bool wipe;
	bool hw2d;

	if (nodrawers || screen == NULL)
		return; 				// for comparative timing / profiling
	
	cycle_t cycles;
	
	cycles.Reset();
	cycles.Clock();

	if (players[consoleplayer].camera == NULL)
	{
		players[consoleplayer].camera = players[consoleplayer].mo;
	}

	if (viewactive)
	{
		R_SetFOV (players[consoleplayer].camera && players[consoleplayer].camera->player ?
			players[consoleplayer].camera->player->FOV : 90.f);
	}

	// [RH] change the screen mode if needed
	if (setmodeneeded)
	{
		// Change screen mode.
		if (Video->SetResolution (NewWidth, NewHeight, NewBits))
		{
			// Recalculate various view parameters.
			setsizeneeded = true;
			// Let the status bar know the screen size changed
			if (StatusBar != NULL)
			{
				StatusBar->ScreenSizeChanged ();
			}
			// Refresh the console.
			C_NewModeAdjust ();
			// Reload crosshair if transitioned to a different size
			ST_LoadCrosshair (true);
			AM_NewResolution ();
		}
	}

	RenderTarget = screen;

	// change the view size if needed
	if (setsizeneeded && StatusBar != NULL)
	{
		R_ExecuteSetViewSize ();
	}
	setmodeneeded = false;

	if (screen->Lock (false))
	{
		SB_state = screen->GetPageCount ();
		BorderNeedRefresh = screen->GetPageCount ();
	}

	// [RH] Allow temporarily disabling wipes
	if (NoWipe)
	{
		BorderNeedRefresh = screen->GetPageCount ();
		NoWipe--;
		wipe = false;
		wipegamestate = gamestate;
	}
	else if (gamestate != wipegamestate && gamestate != GS_FULLCONSOLE && gamestate != GS_TITLELEVEL)
	{ // save the current screen if about to wipe
		BorderNeedRefresh = screen->GetPageCount ();
		if (wipegamestate != GS_FORCEWIPEFADE)
		{
			wipe = screen->WipeStartScreen (wipetype);
		}
		else
		{
			wipe = screen->WipeStartScreen (wipe_Fade);
		}
		wipegamestate = gamestate;
	}
	else
	{
		wipe = false;
	}

	hw2d = false;

	if (testpolymost)
	{
		drawpolymosttest();
		C_DrawConsole(hw2d);
		M_Drawer();
	}
	else
	{
		switch (gamestate)
		{
		case GS_FULLCONSOLE:
			screen->SetBlendingRect(0,0,0,0);
			hw2d = screen->Begin2D(false);
			C_DrawConsole (false);
			M_Drawer ();
			screen->Update ();
			return;

		case GS_LEVEL:
		case GS_TITLELEVEL:
			if (!gametic)
				break;

			if (StatusBar != NULL)
			{
				float blend[4] = { 0, 0, 0, 0 };
				StatusBar->BlendView (blend);
			}
			screen->SetBlendingRect(viewwindowx, viewwindowy,
				viewwindowx + viewwidth, viewwindowy + viewheight);
			P_CheckPlayerSprites();
			screen->RenderView(&players[consoleplayer]);
			if ((hw2d = screen->Begin2D(viewactive)))
			{
				// Redraw everything every frame when using 2D accel
				SB_state = screen->GetPageCount();
				BorderNeedRefresh = screen->GetPageCount();
			}
			screen->DrawRemainingPlayerSprites();
			screen->DrawBlendingRect();
			if (automapactive)
			{
				int saved_ST_Y = ST_Y;
				if (hud_althud && viewheight == SCREENHEIGHT)
				{
					ST_Y = viewheight;
				}
				AM_Drawer ();
				ST_Y = saved_ST_Y;
			}
			if (!automapactive || viewactive)
			{
				R_RefreshViewBorder ();
			}

			if (hud_althud && viewheight == SCREENHEIGHT && screenblocks > 10)
			{
				if (DrawFSHUD || automapactive) DrawHUD();
				StatusBar->DrawTopStuff (HUD_None);
			}
			else 
			if (viewheight == SCREENHEIGHT && viewactive && screenblocks > 10)
			{
				StatusBar->Draw (DrawFSHUD ? HUD_Fullscreen : HUD_None);
				StatusBar->DrawTopStuff (DrawFSHUD ? HUD_Fullscreen : HUD_None);
			}
			else
			{
				StatusBar->Draw (HUD_StatusBar);
				StatusBar->DrawTopStuff (HUD_StatusBar);
			}
			CT_Drawer ();
			break;

		case GS_INTERMISSION:
			screen->SetBlendingRect(0,0,0,0);
			hw2d = screen->Begin2D(false);
			WI_Drawer ();
			CT_Drawer ();
			break;

		case GS_FINALE:
			screen->SetBlendingRect(0,0,0,0);
			hw2d = screen->Begin2D(false);
			F_Drawer ();
			CT_Drawer ();
			break;

		case GS_DEMOSCREEN:
			screen->SetBlendingRect(0,0,0,0);
			hw2d = screen->Begin2D(false);
			D_PageDrawer ();
			CT_Drawer ();
			break;

		default:
			break;
		}
	}
	// draw pause pic
	if (paused && menuactive == MENU_Off)
	{
		FTexture *tex;
		int x;

		tex = TexMan[gameinfo.gametype & (GAME_DoomStrifeChex) ? "M_PAUSE" : "PAUSED"];
		x = (SCREENWIDTH - tex->GetScaledWidth() * CleanXfac)/2 +
			tex->GetScaledLeftOffset() * CleanXfac;
		screen->DrawTexture (tex, x, 4, DTA_CleanNoMove, true, TAG_DONE);
	}

	// [RH] Draw icon, if any
	if (D_DrawIcon)
	{
		FTextureID picnum = TexMan.CheckForTexture (D_DrawIcon, FTexture::TEX_MiscPatch);

		D_DrawIcon = NULL;
		if (picnum.isValid())
		{
			FTexture *tex = TexMan[picnum];
			screen->DrawTexture (tex, 160 - tex->GetScaledWidth()/2, 100 - tex->GetScaledHeight()/2,
				DTA_320x200, true, TAG_DONE);
		}
		NoWipe = 10;
	}

	if (snd_drawoutput)
	{
		GSnd->DrawWaveDebug(snd_drawoutput);
	}

	if (!wipe || NoWipe < 0)
	{
		NetUpdate ();			// send out any new accumulation
		// normal update
		C_DrawConsole (hw2d);	// draw console
		M_Drawer ();			// menu is drawn even on top of everything
		FStat::PrintStat ();
		screen->Update ();		// page flip or blit buffer
	}
	else
	{
		// wipe update
		unsigned int wipestart, nowtime, diff;
		bool done;

		GSnd->SetSfxPaused(true, 1);
		I_FreezeTime(true);
		screen->WipeEndScreen ();

		wipestart = I_MSTime();
		NetUpdate();		// send out any new accumulation

		do
		{
			do
			{
				I_WaitVBL(2);
				nowtime = I_MSTime();
				diff = (nowtime - wipestart) * 40 / 1000;	// Using 35 here feels too slow.
			} while (diff < 1);
			wipestart = nowtime;
			done = screen->WipeDo (1);
			C_DrawConsole (hw2d);	// console and
			M_Drawer ();			// menu are drawn even on top of wipes
			screen->Update ();		// page flip or blit buffer
			NetUpdate ();			// [RH] not sure this is needed anymore
		} while (!done);
		screen->WipeCleanup();
		I_FreezeTime(false);
		GSnd->SetSfxPaused(false, 1);
	}

	cycles.Unclock();
	FrameCycles = cycles;
}

//==========================================================================
//
// D_ErrorCleanup ()
//
// Cleanup after a recoverable error.
//==========================================================================

void D_ErrorCleanup ()
{
	screen->Unlock ();
	bglobal.RemoveAllBots (true);
	D_QuitNetGame ();
	if (demorecording || demoplayback)
		G_CheckDemoStatus ();
	Net_ClearBuffers ();
	G_NewInit ();
	singletics = false;
	playeringame[0] = 1;
	players[0].playerstate = PST_LIVE;
	gameaction = ga_fullconsole;
	if (gamestate == GS_DEMOSCREEN)
	{
		menuactive = MENU_Off;
	}
	insave = false;
}

//==========================================================================
//
// D_DoomLoop
//
// Manages timing and IO, calls all ?_Responder, ?_Ticker, and ?_Drawer,
// calls I_GetTime, I_StartFrame, and I_StartTic
//
//==========================================================================

void D_DoomLoop ()
{
	int lasttic = 0;

	// Clamp the timer to TICRATE until the playloop has been entered.
	r_NoInterpolate = true;

	for (;;)
	{
		try
		{
			// frame syncronous IO operations
			if (gametic > lasttic)
			{
				lasttic = gametic;
				I_StartFrame ();
			}
			
			// process one or more tics
			if (singletics)
			{
				I_StartTic ();
				D_ProcessEvents ();
				G_BuildTiccmd (&netcmds[consoleplayer][maketic%BACKUPTICS]);
				//Added by MC: For some of that bot stuff. The main bot function.
				int i;
				for (i = 0; i < MAXPLAYERS; i++)
				{
					if (playeringame[i] && players[i].isbot && players[i].mo)
					{
						players[i].savedyaw = players[i].mo->angle;
						players[i].savedpitch = players[i].mo->pitch;
					}
				}
				bglobal.Main (maketic%BACKUPTICS);
				for (i = 0; i < MAXPLAYERS; i++)
				{
					if (playeringame[i] && players[i].isbot && players[i].mo)
					{
						players[i].mo->angle = players[i].savedyaw;
						players[i].mo->pitch = players[i].savedpitch;
					}
				}
				if (advancedemo)
					D_DoAdvanceDemo ();
				C_Ticker ();
				M_Ticker ();
				G_Ticker ();
				// [RH] Use the consoleplayer's camera to update sounds
				S_UpdateSounds (players[consoleplayer].camera);	// move positional sounds
				gametic++;
				maketic++;
				GC::CheckGC ();
				Net_NewMakeTic ();
			}
			else
			{
				TryRunTics (); // will run at least one tic
			}
			// Update display, next frame, with current state.
			I_StartTic ();
			D_Display ();
		}
		catch (CRecoverableError &error)
		{
			if (error.GetMessage ())
			{
				Printf (PRINT_BOLD, "\n%s\n", error.GetMessage());
			}
			D_ErrorCleanup ();
		}
	}
}

//==========================================================================
//
// D_PageTicker
//
//==========================================================================

void D_PageTicker (void)
{
	if (--pagetic < 0)
		D_AdvanceDemo ();
}

//==========================================================================
//
// D_PageDrawer
//
//==========================================================================

void D_PageDrawer (void)
{
	if (Page != NULL)
	{
		screen->DrawTexture (Page, 0, 0,
			DTA_Fullscreen, true,
			DTA_Masked, false,
			DTA_BilinearFilter, true,
			TAG_DONE);
		screen->FillBorder (NULL);
	}
	else
	{
		screen->Clear (0, 0, SCREENWIDTH, SCREENHEIGHT, 0, 0);
		if (!PageBlank)
		{
			screen->DrawText (SmallFont, CR_WHITE, 0, 0, "Page graphic goes here", TAG_DONE);
		}
	}
	if (Advisory != NULL)
	{
		screen->DrawTexture (Advisory, 4, 160, DTA_320x200, true, TAG_DONE);
	}
}

//==========================================================================
//
// D_AdvanceDemo
//
// Called after each demo or intro demosequence finishes
//
//==========================================================================

void D_AdvanceDemo (void)
{
	advancedemo = true;
}

//==========================================================================
//
// D_DoStrifeAdvanceDemo
//
//==========================================================================

void D_DoStrifeAdvanceDemo ()
{
	static const char *const fullVoices[6] =
	{
		"svox/pro1", "svox/pro2", "svox/pro3", "svox/pro4", "svox/pro5", "svox/pro6"
	};
	static const char *const teaserVoices[6] =
	{
		"svox/voc91", "svox/voc92", "svox/voc93", "svox/voc94", "svox/voc95", "svox/voc96"
	};
	const char *const *voices = gameinfo.flags & GI_SHAREWARE ? teaserVoices : fullVoices;
	const char *pagename = NULL;

	gamestate = GS_DEMOSCREEN;
	PageBlank = false;

	switch (demosequence)
	{
	default:
	case 0:
		pagetic = 6 * TICRATE;
		pagename = "TITLEPIC";
		if (Wads.CheckNumForName ("d_logo", ns_music) < 0)
		{ // strife0.wad does not have d_logo
			S_StartMusic ("");
		}
		else
		{
			S_StartMusic ("d_logo");
		}
		C_HideConsole ();
		break;

	case 1:
		// [RH] Strife fades to black and then to the Rogue logo, but
		// I think it looks better if it doesn't fade.
		pagetic = 10 * TICRATE/35;
		pagename = "";	// PANEL0, but strife0.wad doesn't have it, so don't use it.
		PageBlank = true;
		S_Sound (CHAN_VOICE | CHAN_UI, "bishop/active", 1, ATTN_NORM);
		break;

	case 2:
		pagetic = 4 * TICRATE;
		pagename = "RGELOGO";
		break;

	case 3:
		pagetic = 7 * TICRATE;
		pagename = "PANEL1";
		S_Sound (CHAN_VOICE | CHAN_UI, voices[0], 1, ATTN_NORM);
		// The new Strife teaser has D_FMINTR.
		// The full retail Strife has D_INTRO.
		// And the old Strife teaser has both. (I do not know which one it actually uses, nor do I care.)
		S_StartMusic (gameinfo.flags & GI_TEASER2 ? "d_fmintr" : "d_intro");
		break;

	case 4:
		pagetic = 9 * TICRATE;
		pagename = "PANEL2";
		S_Sound (CHAN_VOICE | CHAN_UI, voices[1], 1, ATTN_NORM);
		break;

	case 5:
		pagetic = 12 * TICRATE;
		pagename = "PANEL3";
		S_Sound (CHAN_VOICE | CHAN_UI, voices[2], 1, ATTN_NORM);
		break;

	case 6:
		pagetic = 11 * TICRATE;
		pagename = "PANEL4";
		S_Sound (CHAN_VOICE | CHAN_UI, voices[3], 1, ATTN_NORM);
		break;

	case 7:
		pagetic = 10 * TICRATE;
		pagename = "PANEL5";
		S_Sound (CHAN_VOICE | CHAN_UI, voices[4], 1, ATTN_NORM);
		break;

	case 8:
		pagetic = 16 * TICRATE;
		pagename = "PANEL6";
		S_Sound (CHAN_VOICE | CHAN_UI, voices[5], 1, ATTN_NORM);
		break;

	case 9:
		pagetic = 6 * TICRATE;
		pagename = "vellogo";
		wipegamestate = GS_FORCEWIPEFADE;
		break;

	case 10:
		pagetic = 12 * TICRATE;
		pagename = "CREDIT";
		wipegamestate = GS_FORCEWIPEFADE;
		break;
	}
	if (demosequence++ > 10)
		demosequence = 0;
	if (demosequence == 9 && !(gameinfo.flags & GI_SHAREWARE))
		demosequence = 10;

	if (pagename)
	{
		if (Page != NULL)
		{
			Page->Unload ();
			Page = NULL;
		}
		if (pagename[0])
		{
			Page = TexMan[pagename];
		}
	}
}

//==========================================================================
//
// D_DoAdvanceDemo
//
//==========================================================================

void D_DoAdvanceDemo (void)
{
	static char demoname[8] = "DEMO1";
	static int democount = 0;
	static int pagecount;
	const char *pagename = NULL;

	V_SetBlend (0,0,0,0);
	players[consoleplayer].playerstate = PST_LIVE;	// not reborn
	advancedemo = false;
	usergame = false;				// no save / end game here
	paused = 0;
	gameaction = ga_nothing;

	// [RH] If you want something more dynamic for your title, create a map
	// and name it TITLEMAP. That map will be loaded and used as the title.

	if (P_CheckMapData("TITLEMAP"))
	{
		G_InitNew ("TITLEMAP", true);
		return;
	}

	if (gameinfo.gametype == GAME_Strife)
	{
		D_DoStrifeAdvanceDemo ();
		return;
	}

	switch (demosequence)
	{
	case 3:
		if (gameinfo.advisoryTime)
		{
			Advisory = TexMan["ADVISOR"];
			demosequence = 1;
			pagetic = (int)(gameinfo.advisoryTime * TICRATE);
			break;
		}
		// fall through to case 1 if no advisory notice

	case 1:
		Advisory = NULL;
		if (!M_DemoNoPlay)
		{
			BorderNeedRefresh = screen->GetPageCount ();
			democount++;
			mysnprintf (demoname + 4, countof(demoname) - 4, "%d", democount);
			if (Wads.CheckNumForName (demoname) < 0)
			{
				demosequence = 0;
				democount = 0;
				// falls through to case 0 below
			}
			else
			{
				G_DeferedPlayDemo (demoname);
				demosequence = 2;
				break;
			}
		}

	default:
	case 0:
		gamestate = GS_DEMOSCREEN;
		pagename = gameinfo.titlePage;
		pagetic = (int)(gameinfo.titleTime * TICRATE);
		S_StartMusic (gameinfo.titleMusic);
		demosequence = 3;
		pagecount = 0;
		C_HideConsole ();
		break;

	case 2:
		pagetic = (int)(gameinfo.pageTime * TICRATE);
		gamestate = GS_DEMOSCREEN;
		pagename = gameinfo.creditPages[pagecount];
		pagecount = (pagecount+1) % gameinfo.creditPages.Size();
		demosequence = 1;
		break;
	}

	if (pagename)
	{
		if (Page != NULL)
		{
			Page->Unload ();
		}
		Page = TexMan[pagename];
	}
}

//==========================================================================
//
// D_StartTitle
//
//==========================================================================

void D_StartTitle (void)
{
	gameaction = ga_nothing;
	demosequence = -1;
	D_AdvanceDemo ();
}

//==========================================================================
//
// Cmd_Endgame
//
// [RH] Quit the current game and go to fullscreen console
//
//==========================================================================

CCMD (endgame)
{
	if (!netgame)
	{
		gameaction = ga_fullconsole;
		demosequence = -1;
	}
}

//==========================================================================
//
// D_AddFile
//
//==========================================================================

bool D_AddFile (TArray<FString> &wadfiles, const char *file, bool check, int position)
{
	if (file == NULL)
	{
		return false;
	}

	if (check && !DirEntryExists (file))
	{
		const char *f = BaseFileSearch (file, ".wad");
		if (f == NULL)
		{
			Printf ("Can't find '%s'\n", file);
			return false;
		}
		file = f;
	}

	FString f = file;
	FixPathSeperator(f);
	if (position == -1) wadfiles.Push(f);
	else wadfiles.Insert(position, f);
	return true;
}

//==========================================================================
//
// D_AddWildFile
//
//==========================================================================

void D_AddWildFile (TArray<FString> &wadfiles, const char *value)
{
	const char *wadfile = BaseFileSearch (value, ".wad");

	if (wadfile != NULL)
	{
		D_AddFile (wadfiles, wadfile);
	}
	else
	{ // Try pattern matching
		findstate_t findstate;
		char path[PATH_MAX];
		char *sep;
		void *handle = I_FindFirst (value, &findstate);

		strcpy (path, value);
		sep = strrchr (path, '/');
		if (sep == NULL)
		{
			sep = strrchr (path, '\\');
#ifdef _WIN32
			if (sep == NULL && path[1] == ':')
			{
				sep = path + 1;
			}
#endif
		}

		if (handle != ((void *)-1))
		{
			do
			{
				if (!(I_FindAttr(&findstate) & FA_DIREC))
				{
					if (sep == NULL)
					{
						D_AddFile (wadfiles, I_FindName (&findstate));
					}
					else
					{
						strcpy (sep+1, I_FindName (&findstate));
						D_AddFile (wadfiles, path);
					}
				}
			} while (I_FindNext (handle, &findstate) == 0);
		}
		I_FindClose (handle);
	}
}

//==========================================================================
//
// D_AddConfigWads
//
// Adds all files in the specified config file section.
//
//==========================================================================

void D_AddConfigWads (TArray<FString> &wadfiles, const char *section)
{
	if (GameConfig->SetSection (section))
	{
		const char *key;
		const char *value;
		FConfigFile::Position pos;

		while (GameConfig->NextInSection (key, value))
		{
			if (stricmp (key, "Path") == 0)
			{
				// D_AddWildFile resets GameConfig's position, so remember it
				GameConfig->GetPosition (pos);
				D_AddWildFile (wadfiles, value);
				// Reset GameConfig's position to get next wad
				GameConfig->SetPosition (pos);
			}
		}
	}
}

//==========================================================================
//
// D_AddDirectory
//
// Add all .wad files in a directory. Does not descend into subdirectories.
//
//==========================================================================

static void D_AddDirectory (TArray<FString> &wadfiles, const char *dir)
{
	char curdir[PATH_MAX];

	if (getcwd (curdir, PATH_MAX))
	{
		char skindir[PATH_MAX];
		findstate_t findstate;
		void *handle;
		size_t stuffstart;

		stuffstart = strlen (dir);
		memcpy (skindir, dir, stuffstart*sizeof(*dir));
		skindir[stuffstart] = 0;

		if (skindir[stuffstart-1] == '/')
		{
			skindir[--stuffstart] = 0;
		}

		if (!chdir (skindir))
		{
			skindir[stuffstart++] = '/';
			if ((handle = I_FindFirst ("*.wad", &findstate)) != (void *)-1)
			{
				do
				{
					if (!(I_FindAttr (&findstate) & FA_DIREC))
					{
						strcpy (skindir + stuffstart, I_FindName (&findstate));
						D_AddFile (wadfiles, skindir);
					}
				} while (I_FindNext (handle, &findstate) == 0);
				I_FindClose (handle);
			}
		}
		chdir (curdir);
	}
}


//==========================================================================
//
// BaseFileSearch
//
// If a file does not exist at <file>, looks for it in the directories
// specified in the config file. Returns the path to the file, if found,
// or NULL if it could not be found.
//
//==========================================================================

static const char *BaseFileSearch (const char *file, const char *ext, bool lookfirstinprogdir)
{
	static char wad[PATH_MAX];

	if (lookfirstinprogdir)
	{
		mysnprintf (wad, countof(wad), "%s%s%s", progdir.GetChars(), progdir[progdir.Len() - 1] != '/' ? "/" : "", file);
		if (DirEntryExists (wad))
		{
			return wad;
		}
	}

	if (DirEntryExists (file))
	{
		mysnprintf (wad, countof(wad), "%s", file);
		return wad;
	}

	if (GameConfig->SetSection ("FileSearch.Directories"))
	{
		const char *key;
		const char *value;

		while (GameConfig->NextInSection (key, value))
		{
			if (stricmp (key, "Path") == 0)
			{
				FString dir;

				dir = NicePath(value);
				if (dir.IsNotEmpty())
				{
					mysnprintf (wad, countof(wad), "%s%s%s", dir.GetChars(), dir[dir.Len() - 1] != '/' ? "/" : "", file);
					if (DirEntryExists (wad))
					{
						return wad;
					}
				}
			}
		}
	}

	// Retry, this time with a default extension
	if (ext != NULL)
	{
		FString tmp = file;
		DefaultExtension (tmp, ext);
		return BaseFileSearch (tmp, NULL);
	}
	return NULL;
}

//==========================================================================
//
// ConsiderPatches
//
// Tries to add any deh/bex patches from the command line.
//
//==========================================================================

bool ConsiderPatches (const char *arg, const char *ext)
{
	bool noDef = false;
	DArgs *files = Args->GatherFiles (arg, ext, false);

	if (files->NumArgs() > 0)
	{
		int i;
		const char *f;

		for (i = 0; i < files->NumArgs(); ++i)
		{
			if ( (f = BaseFileSearch (files->GetArg (i), ".deh")) )
				D_LoadDehFile(f);
			else if ( (f = BaseFileSearch (files->GetArg (i), ".bex")) )
				D_LoadDehFile(f);
		}
		noDef = true;
	}
	files->Destroy();
	return noDef;
}

//==========================================================================
//
// D_LoadWadSettings
//
// Parses any loaded KEYCONF lumps. These are restricted console scripts
// that can only execute the alias, defaultbind, addkeysection,
// addmenukey, weaponsection, and addslotdefault commands.
//
//==========================================================================

void D_LoadWadSettings ()
{
	char cmd[4096];
	int lump, lastlump = 0;

	ParsingKeyConf = true;

	while ((lump = Wads.FindLump ("KEYCONF", &lastlump)) != -1)
	{
		FMemLump data = Wads.ReadLump (lump);
		const char *eof = (char *)data.GetMem() + Wads.LumpLength (lump);
		const char *conf = (char *)data.GetMem();

		while (conf < eof)
		{
			size_t i;

			// Fetch a line to execute
			for (i = 0; conf + i < eof && conf[i] != '\n'; ++i)
			{
				cmd[i] = conf[i];
			}
			cmd[i] = 0;
			conf += i;
			if (*conf == '\n')
			{
				conf++;
			}

			// Comments begin with //
			char *stop = cmd + i - 1;
			char *comment = cmd;
			int inQuote = 0;

			if (*stop == '\r')
				*stop-- = 0;

			while (comment < stop)
			{
				if (*comment == '\"')
				{
					inQuote ^= 1;
				}
				else if (!inQuote && *comment == '/' && *(comment + 1) == '/')
				{
					break;
				}
				comment++;
			}
			if (comment == cmd)
			{ // Comment at line beginning
				continue;
			}
			else if (comment < stop)
			{ // Comment in middle of line
				*comment = 0;
			}

			AddCommandString (cmd);
		}
	}
	ParsingKeyConf = false;
}

//==========================================================================
//
// D_MultiExec
//
//==========================================================================

void D_MultiExec (DArgs *list, bool usePullin)
{
	for (int i = 0; i < list->NumArgs(); ++i)
	{
		C_ExecFile (list->GetArg (i), usePullin);
	}
}

static void GetCmdLineFiles(TArray<FString> &wadfiles)
{
	DArgs *files = Args->GatherFiles ("-file", ".wad", true);
	DArgs *files1 = Args->GatherFiles (NULL, ".zip", false);
	DArgs *files2 = Args->GatherFiles (NULL, ".pk3", false);
	DArgs *files3 = Args->GatherFiles (NULL, ".txt", false);
	if (files->NumArgs() > 0 || files1->NumArgs() > 0 || files2->NumArgs() > 0 || files3->NumArgs() > 0)
	{
		// Check for -file in shareware
		if (gameinfo.flags & GI_SHAREWARE)
		{
			I_FatalError ("You cannot -file with the shareware version. Register!");
		}

		// the files gathered are wadfile/lump names
		for (int i = 0; i < files->NumArgs(); i++)
		{
			D_AddWildFile (wadfiles, files->GetArg (i));
		}
		for (int i = 0; i < files1->NumArgs(); i++)
		{
			D_AddWildFile (wadfiles, files1->GetArg (i));
		}
		for (int i = 0; i < files2->NumArgs(); i++)
		{
			D_AddWildFile (wadfiles, files2->GetArg (i));
		}
		for (int i = 0; i < files3->NumArgs(); i++)
		{
			D_AddWildFile (wadfiles, files3->GetArg (i));
		}
	}
	files->Destroy();
	files1->Destroy();
	files2->Destroy();
	files3->Destroy();
}

static void CopyFiles(TArray<FString> &to, TArray<FString> &from)
{
	unsigned int ndx = to.Reserve(from.Size());
	for(unsigned i=0;i<from.Size(); i++)
	{
		to[ndx+i] = from[i];
	}
}

static FString ParseGameInfo(TArray<FString> &pwads, const char *fn, const char *data, int size)
{
	FScanner sc;
	FString iwad;
	int pos = 0;

	const char *lastSlash = strrchr (fn, '/');

	sc.OpenMem("GAMEINFO", data, size);
	while(sc.GetToken())
	{
		sc.TokenMustBe(TK_Identifier);
		FString nextKey = sc.String;
		sc.MustGetToken('=');
		if (!nextKey.CompareNoCase("IWAD"))
		{
			sc.MustGetString();
			iwad = sc.String;
		}
		else if (!nextKey.CompareNoCase("LOAD"))
		{
			do
			{
				sc.MustGetString();

				// Try looking for the wad in the same directory as the .wad
				// before looking for it in the current directory.

				if (lastSlash != NULL)
				{
					FString checkpath(fn, (lastSlash - fn) + 1);
					checkpath += sc.String;

					if (!FileExists (checkpath))
					{
						pos += D_AddFile(pwads, sc.String, true, pos);
					}
					else
					{
						pos += D_AddFile(pwads, checkpath, true, pos);
					}
				}
			}
			while (sc.CheckToken(','));
		}
	}
	return iwad;
}

static FString CheckGameInfo(TArray<FString> & pwads)
{
	DWORD t = I_FPSTime();
	// scan the list of WADs backwards to find the last one that contains a GAMEINFO lump
	for(int i=pwads.Size()-1; i>=0; i--)
	{
		bool isdir = false;
		FileReader *wadinfo;
		FResourceFile *resfile;
		const char *filename = pwads[i];

		// Does this exist? If so, is it a directory?
		struct stat info;
		if (stat(pwads[i], &info) != 0)
		{
			Printf(TEXTCOLOR_RED "Could not stat %s\n", filename);
			continue;
		}
		isdir = (info.st_mode & S_IFDIR) != 0;

		if (!isdir)
		{
			try
			{
				wadinfo = new FileReader(filename);
			}
			catch (CRecoverableError &)
			{ 
				// Didn't find file
				continue;
			}
			resfile = FResourceFile::OpenResourceFile(filename, wadinfo, true);
		}
		else
			resfile = FResourceFile::OpenDirectory(filename, true);

		if (resfile != NULL)
		{
			DWORD cnt = resfile->LumpCount();
			for(int i=cnt-1; i>=0; i--)
			{
				FResourceLump *lmp = resfile->GetLump(i);

				if (lmp->Namespace == ns_global && !stricmp(lmp->Name, "GAMEINFO"))
				{
					// Found one!
					FString iwad = ParseGameInfo(pwads, resfile->Filename, (const char*)lmp->CacheLump(), lmp->LumpSize);
					delete resfile;
					return iwad;
				}
			}
			delete resfile;
		}
	}
	t = I_FPSTime() - t;
	Printf("Gameinfo scan took %d ms\n", t);
	return "";
}

//==========================================================================
//
// D_DoomMain
//
//==========================================================================

void D_DoomMain (void)
{
	int p, flags;
	char *v;
	const char *wad;
	DArgs *execFiles;
	TArray<FString> pwads;

	// Set the FPU precision to 53 significant bits. This is the default
	// for Visual C++, but not for GCC, so some slight math variances
	// might crop up if we leave it alone.
#if defined(_FPU_GETCW)
	{
		int cw;
		_FPU_GETCW(cw);
		cw = (cw & ~_FPU_EXTENDED) | _FPU_DOUBLE;
		_FPU_SETCW(cw);
	}
#elif defined(_PC_53)
// On the x64 architecture, changing the floating point precision is not supported.
#ifndef _WIN64
	int cfp = _control87(_PC_53, _MCW_PC);
#endif
#endif

	PClass::StaticInit ();
	atterm (C_DeinitConsole);

	gamestate = GS_STARTUP;

	SetLanguageIDs ();

	rngseed = I_MakeRNGSeed();
	FRandom::StaticClearRandom ();
	M_FindResponseFile ();

	Printf ("M_LoadDefaults: Load system defaults.\n");
	M_LoadDefaults ();			// load before initing other systems

	// [RH] Make sure zdoom.pk3 is always loaded,
	// as it contains magic stuff we need.

	wad = BaseFileSearch (BASEWAD, NULL, true);
	if (wad == NULL)
	{
		I_FatalError ("Cannot find " BASEWAD);
	}
	FString basewad = wad;

	// Load zdoom.pk3 alone so that we can get access to the internal gameinfos before 
	// the IWAD is known.

	GetCmdLineFiles(pwads);
	FString iwad = CheckGameInfo(pwads);

	const IWADInfo *iwad_info = D_FindIWAD(allwads, iwad, basewad);
	gameinfo.gametype = iwad_info->gametype;
	gameinfo.flags = iwad_info->flags;

	GameConfig->DoGameSetup (GameNames[gameinfo.gametype]);

	if (!(gameinfo.flags & GI_SHAREWARE) && !Args->CheckParm("-noautoload"))
	{
		FString file;

		// [RH] zvox.wad - A wad I had intended to be automatically generated
		// from Q2's pak0.pak so the female and cyborg player could have
		// voices. I never got around to writing the utility to do it, though.
		// And I probably never will now. But I know at least one person uses
		// it for something else, so this gets to stay here.
		wad = BaseFileSearch ("zvox.wad", NULL);
		if (wad)
			D_AddFile (allwads, wad);
	
		// [RH] Add any .wad files in the skins directory
#ifdef unix
		file = SHARE_DIR;
#else
		file = progdir;
#endif
		file += "skins";
		D_AddDirectory (allwads, file);

#ifdef unix
		file = NicePath("~/" GAME_DIR "/skins");
		D_AddDirectory (allwads, file);
#endif	

		// Add common (global) wads
		D_AddConfigWads (allwads, "Global.Autoload");

		// Add game-specific wads
		file = GameNames[gameinfo.gametype];
		file += ".Autoload";
		D_AddConfigWads (allwads, file);

		// Add IWAD-specific wads
		if (iwad_info->Autoname != NULL)
		{
			file = iwad_info->Autoname;
			file += ".Autoload";
			D_AddConfigWads(allwads, file);
		}
	}

	// Run automatically executed files
	execFiles = new DArgs;
	GameConfig->AddAutoexec (execFiles, GameNames[gameinfo.gametype]);
	D_MultiExec (execFiles, true);

	// Run .cfg files at the start of the command line.
	execFiles = Args->GatherFiles (NULL, ".cfg", false);
	D_MultiExec (execFiles, true);

	C_ExecCmdLineParams ();		// [RH] do all +set commands on the command line

	CopyFiles(allwads, pwads);

	Printf ("W_Init: Init WADfiles.\n");
	Wads.InitMultipleFiles (allwads);
	allwads.Clear();

	// [RH] Initialize localizable strings.
	GStrings.LoadStrings (false);

	V_InitFontColors ();

	// [RH] Moved these up here so that we can do most of our
	//		startup output in a fullscreen console.

	CT_Init ();

	Printf ("I_Init: Setting up machine state.\n");
	I_Init ();

	Printf ("V_Init: allocate screen.\n");
	V_Init ();

	// Base systems have been inited; enable cvar callbacks
	FBaseCVar::EnableCallbacks ();

	Printf ("S_Init: Setting up sound.\n");
	S_Init ();

	Printf ("ST_Init: Init startup screen.\n");
	StartScreen = FStartupScreen::CreateInstance (R_GuesstimateNumTextures() + 5);

	ParseCompatibility();

	Printf ("P_Init: Checking cmd-line parameters...\n");
	flags = dmflags;
	if (Args->CheckParm ("-nomonsters"))	flags |= DF_NO_MONSTERS;
	if (Args->CheckParm ("-respawn"))		flags |= DF_MONSTERS_RESPAWN;
	if (Args->CheckParm ("-fast"))			flags |= DF_FAST_MONSTERS;

	devparm = !!Args->CheckParm ("-devparm");

	if (Args->CheckParm ("-altdeath"))
	{
		deathmatch = 1;
		flags |= DF_ITEMS_RESPAWN;
	}
	else if (Args->CheckParm ("-deathmatch"))
	{
		deathmatch = 1;
		flags |= DF_WEAPONS_STAY | DF_ITEMS_RESPAWN;
	}

	dmflags = flags;

	// get skill / episode / map from parms
	if (gameinfo.gametype != GAME_Hexen)
	{
		startmap = (gameinfo.flags & GI_MAPxx) ? "MAP01" : "E1M1";
	}
	else
	{
		startmap = "&wt@01";
	}
	autostart = false;
				
	const char *val = Args->CheckValue ("-skill");
	if (val)
	{
		gameskill = val[0] - '1';
		autostart = true;
	}

	p = Args->CheckParm ("-warp");
	if (p && p < Args->NumArgs() - 1)
	{
		int ep, map;

		if (gameinfo.flags & GI_MAPxx)
		{
			ep = 1;
			map = atoi (Args->GetArg(p+1));
		}
		else 
		{
			ep = atoi (Args->GetArg(p+1));
			map = p < Args->NumArgs() - 2 ? atoi (Args->GetArg(p+2)) : 10;
			if (map < 1 || map > 9)
			{
				map = ep;
				ep = 1;
			}
		}

		startmap = CalcMapName (ep, map);
		autostart = true;
	}

	// [RH] Hack to handle +map
	p = Args->CheckParm ("+map");
	if (p && p < Args->NumArgs()-1)
	{
		if (!P_CheckMapData(Args->GetArg (p+1)))
		{
			Printf ("Can't find map %s\n", Args->GetArg (p+1));
		}
		else
		{
			startmap = Args->GetArg (p + 1);
			Args->GetArg (p)[0] = '-';
			autostart = true;
		}
	}
	if (devparm)
	{
		Printf ("%s", GStrings("D_DEVSTR"));
	}

#if !defined(unix) && !defined(__APPLE__)
	// We do not need to support -cdrom under Unix, because all the files
	// that would go to c:\\zdoomdat are already stored in .zdoom inside
	// the user's home directory.
	if (Args->CheckParm("-cdrom"))
	{
		Printf ("%s", GStrings("D_CDROM"));
		mkdir (CDROM_DIR, 0);
	}
#endif

	// turbo option  // [RH] (now a cvar)
	{
		UCVarValue value;
		static char one_hundred[] = "100";

		value.String = Args->CheckValue ("-turbo");
		if (value.String == NULL)
			value.String = one_hundred;
		else
			Printf ("turbo scale: %s%%\n", value.String);

		turbo.SetGenericRepDefault (value, CVAR_String);
	}

	v = Args->CheckValue ("-timer");
	if (v)
	{
		double time = strtod (v, NULL);
		Printf ("Levels will end after %g minute%s.\n", time, time > 1 ? "s" : "");
		timelimit = (float)time;
	}

	v = Args->CheckValue ("-avg");
	if (v)
	{
		Printf ("Austin Virtual Gaming: Levels will end after 20 minutes\n");
		timelimit = 20.f;
	}

	//
	//  Build status bar line!
	//
	if (deathmatch)
		StartScreen->AppendStatusLine("DeathMatch...");
	if (dmflags & DF_NO_MONSTERS)
		StartScreen->AppendStatusLine("No Monsters...");
	if (dmflags & DF_MONSTERS_RESPAWN)
		StartScreen->AppendStatusLine("Respawning...");
	if (autostart)
	{
		FString temp;
		temp.Format ("Warp to map %s, Skill %d ", startmap.GetChars(), gameskill + 1);
		StartScreen->AppendStatusLine(temp);
	}

	// [RH] Parse through all loaded mapinfo lumps
	Printf ("G_ParseMapInfo: Load map definitions.\n");
	G_ParseMapInfo (iwad_info->MapInfo);

	// [RH] Parse any SNDINFO lumps
	Printf ("S_InitData: Load sound definitions.\n");
	S_InitData ();


	Printf ("Texman.Init: Init texture manager.\n");
	TexMan.Init();

	// [CW] Parse any TEAMINFO lumps.
	Printf ("ParseTeamInfo: Load team definitions.\n");
	TeamLibrary.ParseTeamInfo ();

	PClassActor::StaticInit ();

	// [GRB] Initialize player class list
	SetupPlayerClasses ();

	// [RH] Load custom key and weapon settings from WADs
	D_LoadWadSettings ();

	// [GRB] Check if someone used clearplayerclasses but not addplayerclass
	if (PlayerClasses.Size () == 0)
	{
		I_FatalError ("No player classes defined");
	}

	StartScreen->Progress ();

	Printf ("R_Init: Init %s refresh subsystem.\n", GameNames[gameinfo.gametype]);
	StartScreen->LoadingStatus ("Loading graphics", 0x3f);
	R_Init ();

	Printf ("DecalLibrary: Load decals.\n");
	DecalLibrary.Clear ();
	DecalLibrary.ReadAllDecals ();

	// [RH] Add any .deh and .bex files on the command line.
	// If there are none, try adding any in the config file.
	// Note that the command line overrides defaults from the config.

	if ((ConsiderPatches("-deh", ".deh") | ConsiderPatches("-bex", ".bex")) == 0 &&
		gameinfo.gametype == GAME_Doom && GameConfig->SetSection ("Doom.DefaultDehacked"))
	{
		const char *key;
		const char *value;

		while (GameConfig->NextInSection (key, value))
		{
			if (stricmp (key, "Path") == 0 && FileExists (value))
			{
				Printf ("Applying patch %s\n", value);
				D_LoadDehFile(value);
			}
		}
	}

	// Load embedded Dehacked patches
	D_LoadDehLumps();

	// Create replacements for dehacked pickups
	FinishDehPatch();

	PClassActor::StaticSetActorNums ();

	// [RH] User-configurable startup strings. Because BOOM does.
	static const char *startupString[5] = {
		"STARTUP1", "STARTUP2", "STARTUP3", "STARTUP4", "STARTUP5"
	};
	for (p = 0; p < 5; ++p)
	{
		const char *str = GStrings[startupString[p]];
		if (str != NULL && str[0] != '\0')
		{
			Printf ("%s\n", str);
		}
	}

	//Added by MC:
	DArgs *bots = Args->GatherFiles("-bots", "", false);
	for (p = 0; p < bots->NumArgs(); ++p)
	{
		bglobal.getspawned.Push(bots->GetArg(p));
	}
	bglobal.spawn_tries = 0;
	bglobal.wanted_botnum = bglobal.getspawned.Size();

	Printf ("M_Init: Init miscellaneous info.\n");
	M_Init ();

	Printf ("P_Init: Init Playloop state.\n");
	StartScreen->LoadingStatus ("Init game engine", 0x3f);
	P_Init ();

	P_SetupWeapons_ntohton();

	//SBarInfo support.
	SBarInfo::Load();

	Printf ("D_CheckNetGame: Checking network game status.\n");
	StartScreen->LoadingStatus ("Checking network game status.", 0x3f);
	D_CheckNetGame ();

	// [RH] Lock any cvars that should be locked now that we're
	// about to begin the game.
	FBaseCVar::EnableNoSet ();

	// [RH] Run any saved commands from the command line or autoexec.cfg now.
	gamestate = GS_FULLCONSOLE;
	Net_NewMakeTic ();
	DThinker::RunThinkers ();
	gamestate = GS_STARTUP;

	// start the apropriate game based on parms
	v = Args->CheckValue ("-record");

	if (v)
	{
		G_RecordDemo (v);
		autostart = true;
	}

	delete StartScreen;
	StartScreen = NULL;

	if (Args->CheckParm("-norun"))
	{
		throw CNoRunExit();
	}

	V_Init2();

	DArgs *files = Args->GatherFiles ("-playdemo", ".lmp", false);
	if (files->NumArgs() > 0)
	{
		singledemo = true;				// quit after one demo
		G_DeferedPlayDemo (files->GetArg (0));
		D_DoomLoop ();	// never returns
	}
	files->Destroy();

	v = Args->CheckValue ("-timedemo");
	if (v)
	{
		G_TimeDemo (v);
		D_DoomLoop ();	// never returns
	}
		
	v = Args->CheckValue ("-loadgame");
	if (v)
	{
		FString file(v);
		FixPathSeperator (file);
		DefaultExtension (file, ".zds");
		G_LoadGame (file);
	}

	if (gameaction != ga_loadgame)
	{
		if (autostart || netgame)
		{
			// Do not do any screenwipes when autostarting a game.
			if (!Args->CheckParm("-warpwipe"))
			{
				NoWipe = TICRATE;
			}
			CheckWarpTransMap (startmap, true);
			if (demorecording)
				G_BeginRecording (startmap);
			G_InitNew (startmap, false);
		}
		else
		{
			D_StartTitle ();				// start up intro loop
		}
	}
	else if (demorecording)
	{
		G_BeginRecording (NULL);
	}
				
	atterm (D_QuitNetGame);		// killough

	D_DoomLoop ();		// never returns
}

//==========================================================================
//
// FStartupScreen Constructor
//
//==========================================================================

FStartupScreen::FStartupScreen(int max_progress)
{
	MaxPos = max_progress;
	CurPos = 0;
	NotchPos = 0;
}

//==========================================================================
//
// FStartupScreen Destructor
//
//==========================================================================

FStartupScreen::~FStartupScreen()
{
}

//==========================================================================
//
// FStartupScreen :: LoadingStatus
//
// Used by Heretic for the Loading Status "window."
//
//==========================================================================

void FStartupScreen::LoadingStatus(const char *message, int colors)
{
}

//==========================================================================
//
// FStartupScreen :: AppendStatusLine
//
// Used by Heretic for the "status line" at the bottom of the screen.
//
//==========================================================================

void FStartupScreen::AppendStatusLine(const char *status)
{
}

//==========================================================================
//
// STAT fps
//
// Displays statistics about rendering times
//
//==========================================================================

ADD_STAT (fps)
{
	FString out;
	out.Format("frame=%04.1f ms  walls=%04.1f ms  planes=%04.1f ms  masked=%04.1f ms",
		FrameCycles.TimeMS(), WallCycles.TimeMS(), PlaneCycles.TimeMS(), MaskedCycles.TimeMS());
	return out;
}

//==========================================================================
//
// STAT wallcycles
//
// Displays the minimum number of cycles spent drawing walls
//
//==========================================================================

static double bestwallcycles = HUGE_VAL;

ADD_STAT (wallcycles)
{
	FString out;
	double cycles = WallCycles.Time();
	if (cycles && cycles < bestwallcycles)
		bestwallcycles = cycles;
	out.Format ("%g", bestwallcycles);
	return out;
}

//==========================================================================
//
// CCMD clearwallcycles
//
// Resets the count of minimum wall drawing cycles
//
//==========================================================================

CCMD (clearwallcycles)
{
	bestwallcycles = HUGE_VAL;
}

#if 1
// To use these, also uncomment the clock/unclock in wallscan
static double bestscancycles = HUGE_VAL;

ADD_STAT (scancycles)
{
	FString out;
	double scancycles = WallScanCycles.Time();
	if (scancycles && scancycles < bestscancycles)
		bestscancycles = scancycles;
	out.Format ("%g", bestscancycles);
	return out;
}

CCMD (clearscancycles)
{
	bestscancycles = HUGE_VAL;
}
#endif