Add being able to toggle over/fixed-30-FPS, off by default

There is now an option in "graphic options" named "toggle fps", which
toggles whether the game visually runs at 1000/34 FPS or over 1000/34
FPS. It is off by default.

I've had to put the entire game loop in yet another set of braces, I'll
indent it next commit.

desktop_version/src/Game.cpp

@@ -387,6 +387,8 @@ void Game::init(void)
     shouldreturntoeditor = false;
 #endif
 
+    over30mode = false;
+
     /* Terry's Patrons... */
     const char* superpatrons_arr[] = {
     "Anders Ekermo",
@@ -4746,6 +4748,11 @@ void Game::loadstats()
             skipfakeload = atoi(pText);
         }
 
+        if (pKey == "over30mode")
+        {
+            over30mode = atoi(pText);
+        }
+
         if (pKey == "notextoutline")
         {
             graphics.notextoutline = atoi(pText);
@@ -4991,6 +4998,10 @@ void Game::savestats()
     msg->LinkEndChild(doc.NewText(help.String((int)graphics.showmousecursor).c_str()));
     dataNode->LinkEndChild(msg);
 
+    msg = doc.NewElement("over30mode");
+    msg->LinkEndChild(doc.NewText(help.String((int) over30mode).c_str()));
+    dataNode->LinkEndChild(msg);
+
     for (size_t i = 0; i < controllerButton_flip.size(); i += 1)
     {
         msg = doc.NewElement("flipButton");
@@ -7063,6 +7074,7 @@ void Game::createmenu( enum Menu::MenuName t, bool samemenu/*= false*/ )
         option("toggle filter");
         option("toggle analogue");
         option("toggle mouse");
+        option("toggle fps");
         option("return");
         menuxoff = -50;
         menuyoff = 8;

desktop_version/src/Game.h

@@ -401,6 +401,8 @@ public:
     {
         return inintermission || insecretlab || intimetrial || nodeathmode;
     }
+
+    bool over30mode;
 };
 
 extern Game game;

desktop_version/src/Input.cpp

@@ -358,6 +358,12 @@ void menuactionpress()
                 graphics.showmousecursor = true;
             }
             break;
+        case 5:
+            //toggle 30+ fps
+            music.playef(11);
+            game.over30mode = !game.over30mode;
+            game.savestats();
+            break;
         default:
             //back
             music.playef(11);

desktop_version/src/Render.cpp

@@ -162,6 +162,20 @@ void menurender()
                 graphics.Print(-1, 85, "Current mode: HIDE", tr/2, tg/2, tb/2, true);
             }
             break;
+        case 5:
+            graphics.bigprint(-1, 30, "Toggle 30+ FPS", tr, tg, tb, true);
+            graphics.Print(-1, 65, "Change whether the game", tr, tg, tb, true);
+            graphics.Print(-1, 75, "runs at 30 or over 30 FPS.", tr, tg, tb, true);
+
+            if (!game.over30mode)
+            {
+                graphics.Print(-1, 95, "Current mode: 30 FPS", tr/2, tg/2, tb/2, true);
+            }
+            else
+            {
+                graphics.Print(-1, 95, "Current mode: Over 30 FPS", tr, tg, tb, true);
+            }
+            break;
         }
         break;
     case Menu::credits:

desktop_version/src/main.cpp

@@ -306,12 +306,34 @@ int main(int argc, char *argv[])
     volatile Uint32 time = 0;
     volatile Uint32 timePrev = 0;
     volatile Uint32 accumulator = 0;
+    volatile Uint32 f_time = 0;
+    volatile Uint32 f_timePrev = 0;
+    volatile Uint32 f_accumulator = 0;
     game.infocus = true;
     key.isActive = true;
     game.gametimer = 0;
 
     while(!key.quitProgram)
     {
+        f_timePrev = f_time;
+        f_time = SDL_GetTicks();
+        const float f_rawdeltatime = static_cast<float>(f_time - f_timePrev);
+        if (!game.over30mode)
+        {
+            f_accumulator += f_rawdeltatime;
+        }
+
+        while ((game.over30mode || f_accumulator >= 34) && !key.quitProgram)
+        {
+            if (game.over30mode)
+            {
+                f_accumulator = 0;
+            }
+            else
+            {
+                f_accumulator = fmodf(f_accumulator, 34);
+            }
+
         timePrev = time;
         time = SDL_GetTicks();
 
@@ -601,6 +623,7 @@ int main(int argc, char *argv[])
             }
             gameScreen.FlipScreen();
         }
+        }
     }
 
     game.savestats();