-let's hope this will solve the pausing problem for good.

The checks for game pause were totally inconsistent, so now there is a utility function that tells whether the game is supposed to run or not.
pause can also take 3 values now - 0 for no pause, 1 for pause from opening the menu or console or 2 for hitting the pause button.

source/core/gamecontrol.cpp

@@ -1103,11 +1103,12 @@ bool CheckCheatmode(bool printmsg)
 void updatePauseStatus()
 {
 	bool GUICapture = System_WantGuiCapture();
-    if ( GUICapture)
+    if (M_Active() || ConsoleState != c_up)
     {
         paused = 1;
+		return;
     }
-    else if ((!M_Active() || !GUICapture) && !pausedWithKey)
+    else if (!pausedWithKey)
     {
         paused = 0;
     }
@@ -1115,7 +1116,7 @@ void updatePauseStatus()
     if (inputState.GetKeyStatus(sc_Pause))
     {
         inputState.ClearKeyStatus(sc_Pause);
-        paused = !paused;
+		paused = pausedWithKey ? 0 : 2;
 
         if (paused)
         {
@@ -1123,10 +1124,10 @@ void updatePauseStatus()
         }
         else
         {
-            S_ResumeSound(paused);
+            S_ResumeSound(!!paused);
         }
 
-        pausedWithKey = paused;
+        pausedWithKey = !!paused;
     }
 }
 

source/core/gamecontrol.h

@@ -202,6 +202,7 @@ enum
 	PAUSESFX_CONSOLE = 2
 };
 
+bool UIActive();
 void updatePauseStatus();
 void updatePauseStatus(bool state, bool multiplayer);
 extern int paused;

source/games/duke/src/constants.h

@@ -483,7 +483,6 @@ enum EFlamethrowerState
 };
 
 enum gamemode_t {
-	MODE_MENU = 0x00000001,
 	MODE_DEMO = 0x00000002,
 	MODE_GAME = 0x00000004,
 	MODE_EOL = 0x00000008,

source/games/duke/src/d_menu.cpp

@@ -221,12 +221,6 @@ void GameInterface::MenuOpened()
 		totalclock = ototalclock;
 		screenpeek = myconnectindex;
 	}
-
-	auto& gm = ps[myconnectindex].gm;
-	if (gm & MODE_GAME)
-	{
-		gm |= MODE_MENU;
-	}
 }
 
 void GameInterface::MenuSound(EMenuSounds snd)
@@ -260,7 +254,6 @@ void GameInterface::MenuClosed()
 	if (gm & MODE_GAME)
 	{
 		// The following lines are here so that you cannot close the menu when no game is running.
-		gm &= ~MODE_MENU;
 
 		if (ud.multimode < 2 && ud.recstat != 2)
 		{

source/games/duke/src/game.cpp

@@ -40,6 +40,7 @@ Modifications for JonoF's port by Jonathon Fowler (jf@jonof.id.au)
 #include "i_interface.h"
 #include "prediction.h"
 #include "glbackend/glbackend.h"
+#include "gamestate.h"
 
 BEGIN_DUKE_NS
 
@@ -282,7 +283,7 @@ static void ticker(void)
 	S_Update();
 
 	// we need CONTROL_GetInput in order to pick up joystick button presses
-	if (!(ps[myconnectindex].gm & MODE_GAME) || (paused && !System_WantGuiCapture()))
+	if (gamestate != GS_LEVEL || (paused && !System_WantGuiCapture()))
 	{
 		ControlInfo noshareinfo;
 		CONTROL_GetInput(&noshareinfo);

source/games/duke/src/game_misc.cpp

@@ -174,17 +174,13 @@ void FTA(int q, struct player_struct* p)
 
 void drawbackground(void)
 {
-	if ((ps[myconnectindex].gm & MODE_GAME) == 0 && ud.recstat != 2)
-	{
-		twod->ClearScreen();
-		auto tex = tileGetTexture(TILE_MENUSCREEN);
-		PalEntry color = 0xff808080;
-		if (!hud_bgstretch)
-			DrawTexture(twod, tex, 0, 0, DTA_FullscreenEx, 3, DTA_Color, color, TAG_DONE);
-		else
-			DrawTexture(twod, tex, 0, 0, DTA_VirtualWidth, twod->GetWidth(), DTA_VirtualHeight, twod->GetHeight(), DTA_KeepRatio, true, DTA_Color, color, TAG_DONE);
-		return;
-	}
+	twod->ClearScreen();
+	auto tex = tileGetTexture(TILE_MENUSCREEN);
+	PalEntry color = 0xff808080;
+	if (!hud_bgstretch)
+		DrawTexture(twod, tex, 0, 0, DTA_FullscreenEx, 3, DTA_Color, color, TAG_DONE);
+	else
+		DrawTexture(twod, tex, 0, 0, DTA_VirtualWidth, twod->GetWidth(), DTA_VirtualHeight, twod->GetHeight(), DTA_KeepRatio, true, DTA_Color, color, TAG_DONE);
 }
 
 //---------------------------------------------------------------------------
@@ -304,7 +300,7 @@ void displayrest(int smoothratio)
 
 			if (ud.scrollmode == 0)
 			{
-				if (pp->newowner == -1 && !paused)
+				if (pp->newowner == -1 && playrunning())
 				{
 					if (screenpeek == myconnectindex && numplayers > 1)
 					{
@@ -328,7 +324,7 @@ void displayrest(int smoothratio)
 			}
 			else
 			{
-				if (!paused)
+				if (playrunning())
 				{
 					ud.fola += ud.folavel >> 3;
 					ud.folx += (ud.folfvel * sintable[(512 + 2048 - ud.fola) & 2047]) >> 14;
@@ -371,7 +367,7 @@ void displayrest(int smoothratio)
 		}
 	}
 
-	if (paused == 1 && (ps[myconnectindex].gm & MODE_MENU) == 0)
+	if (paused == 2)
 		fi.PrintPaused();
 }
 

source/games/duke/src/gameexec.cpp

@@ -961,7 +961,6 @@ int ParseState::parse(void)
 #if 0
 			if( lastsavedpos >= 0 && ud.recstat != 2 )
 			{
-				ps[g_p].gm = MODE_MENU;
 				KB_ClearKeyDown(sc_Space);
 				cmenu(15000);
 			}

source/games/duke/src/gameloop.cpp

@@ -233,7 +233,7 @@ int domovethings()
 
 	//if(ud.recstat == 1) record();
 
-	if (paused == 0)
+	if (playrunning())
 	{
 		global_random = krand();
 		movedummyplayers();//ST 13
@@ -241,7 +241,7 @@ int domovethings()
 
 	for (i = connecthead; i >= 0; i = connectpoint2[i])
 	{
-		if (paused == 0)
+		if (playrunning())
 		{
 			auto p = &ps[i];
 			if (p->pals.a > 0)
@@ -253,7 +253,7 @@ int domovethings()
 		}
 	}
 
-	if (paused == 0)
+	if (playrunning())
 	{
 		if (levelTextTime > 0)
 			levelTextTime--;
@@ -317,12 +317,11 @@ bool GameTicker()
 	gameupdatetime.Reset();
 	gameupdatetime.Clock();
 
-	while ((!(ps[myconnectindex].gm & (MODE_MENU | MODE_DEMO))) && (int)(totalclock - ototalclock) >= TICSPERFRAME)
+	while (playrunning() && (int)(totalclock - ototalclock) >= TICSPERFRAME)
 	{
 		ototalclock += TICSPERFRAME;
 
 		GetInput();
-		// this is where we fill the input_t struct that is actually processed by P_ProcessInput()
 		auto const pPlayer = &ps[myconnectindex];
 		auto const q16ang = fix16_to_int(pPlayer->q16ang);
 		auto& input = nextinput(myconnectindex);
@@ -338,12 +337,15 @@ bool GameTicker()
 
 		advancequeue(myconnectindex);
 
-		if (((!System_WantGuiCapture() && (ps[myconnectindex].gm & MODE_MENU) != MODE_MENU) || ud.recstat == 2 || (ud.multimode > 1)) &&
-			(ps[myconnectindex].gm & MODE_GAME))
+		if (playrunning())
 		{
 			moveloop();
 		}
 	}
+	if (!playrunning())
+	{
+		ototalclock = totalclock - 1;
+	}
 
 	gameUpdate = true;
 	gameupdatetime.Unclock();
@@ -394,6 +396,7 @@ void app_loop()
 	while (true)
 	{
 		handleevents();
+		updatePauseStatus();
 		switch (gamestate)
 		{
 		default:

source/games/duke/src/inlines.h

@@ -164,10 +164,14 @@ inline void SetPlayerPal(player_struct* p, PalEntry pe)
 	p->pals = pe;
 }
 
+inline bool playrunning()
+{
+	return (paused == 0 || (paused == 1 && (ud.recstat == 2 || ud.multimode > 1)));
+}
+
 inline int calc_smoothratio(ClockTicks totalclk, ClockTicks ototalclk)
 {
-	if (!((ud.multimode < 2 && ((ps[myconnectindex].gm & MODE_MENU) == 0)) ||
-		ud.multimode > 1 || ud.recstat == 2) || paused)
+	if (!playrunning())
 	{
 		return 65536;
 	}

source/games/duke/src/input.cpp

@@ -1227,7 +1227,6 @@ void GetInput()
 {
 	double elapsedInputTicks;
 	auto const p = &ps[myconnectindex];
-	updatePauseStatus();
 
 	auto now = I_msTimeF();
 	// do not let this become too large - it would create overflows resulting in undefined behavior. The very first tic must not use the timer difference at all because the timer has not been set yet.

source/games/duke/src/render.cpp

@@ -293,9 +293,9 @@ void animatecamsprite(int smoothRatio)
 
 void setdrugmode(player_struct *p, int oyrepeat)
 {
-	if (!paused)
+	if (playrunning())
 	{
-		if (p->DrugMode > 0 && !(p->gm & MODE_TYPE) && !paused)
+		if (p->DrugMode > 0 && !(p->gm & MODE_TYPE))
 		{
 			int var_8c;
 			if (p->drug_stat[0] == 0)
@@ -491,7 +491,7 @@ void displayrooms(int snum, int smoothratio)
 	videoSetCorrectedAspect();
 
 	smoothratio = min(max(smoothratio, 0), 65536);
-	if (paused || ps[snum].on_crane > -1) smoothratio = 65536;
+	if (!playrunning() || ps[snum].on_crane > -1) smoothratio = 65536;
 
 	sect = p->cursectnum;
 	if (sect < 0 || sect >= MAXSECTORS) return;

source/games/duke/src/savegame.cpp

@@ -29,6 +29,7 @@ Modifications for JonoF's port by Jonathon Fowler (jf@jonof.id.au)
 #include "serializer.h"
 #include "mapinfo.h"
 #include "duke3d.h"
+#include "gamestate.h"
 
 
 BEGIN_DUKE_NS
@@ -483,6 +484,7 @@ void GameInterface::SerializeGameState(FSerializer& arc)
 		{
 			screenpeek = myconnectindex;
 			ps[myconnectindex].gm = MODE_GAME;
+			gamestate = GS_LEVEL;
 			ud.recstat = 0;
 
 			ud.m_player_skill = ud.player_skill;

source/games/duke/src/sounds.cpp

@@ -375,7 +375,7 @@ void S_Update(void)
 int S_PlaySound3D(int sndnum, int spriteNum, const vec3_t* pos, int channel, EChanFlags flags)
 {
 	auto const pl = &ps[myconnectindex];
-	if (!soundEngine->isValidSoundId(sndnum+1) || !SoundEnabled() || (unsigned)spriteNum >= MAXSPRITES || (pl->gm & MODE_MENU) ||
+	if (!soundEngine->isValidSoundId(sndnum+1) || !SoundEnabled() || (unsigned)spriteNum >= MAXSPRITES || !playrunning() ||
 		(pl->timebeforeexit > 0 && pl->timebeforeexit <= REALGAMETICSPERSEC * 3)) return -1;
 
 	int userflags = S_GetUserFlags(sndnum);