loading screen optimizations

Author: Niko

decompile/General/LOAD/LOAD_41_OvrEndRace.c

@@ -22,7 +22,14 @@ void DECOMP_LOAD_OvrEndRace(unsigned int param_1)
 
 	// save ID, and reload next overlay (sector read invalidation)
 	gGT->overlayIndex_EndOfRace = param_1;
+	
+	// Optimization, new Region1 overlays
+	// cut off loading at 2 disc sectors (not 3),
+	// so Region2 RAM is protected, dont reload
+	// Region2 unless numPlayers changes (LOAD_OvrLOD)
+	#if 0
     gGT->overlayIndex_LOD = 0xff;
+	#endif
   }
   return;
 }

decompile/General/LOAD/LOAD_44_TenStages.c

@@ -311,6 +311,10 @@ int DECOMP_LOAD_TenStages(struct GameTracker* gGT, int loadingStage, struct BigH
 		}
 		case 2:
 		{
+			int levelID = gGT->levelID;
+			
+			if (levelID == MAIN_MENU_LEVEL) break;
+			
 			#ifdef USE_HIGHMP
 			DECOMP_LOAD_OvrLOD(1);
 			#else

decompile/General/MAIN/MainMain.c

@@ -799,6 +799,12 @@ void StateZero()
 	firstEntry[231].size = 28*0x800;
 	//firstEntry[231].size = (u_int)RB_NewEndFile - (u_int)OVR_Region3;
 	//printf("Size: %08x\n", firstEntry[231].size);
+	
+	// Cut off Region1 overlays at 2 sectors (not 3),
+	// This protects Region2 RAM so it is not overwritten
+	// during Region1 disc streaming, saves loading time
+	for(int i = 221; i <= 225; i++)
+		firstEntry[i].size = 2*0x800;
 	#endif
 
 	#ifndef FastBoot