[saco] Implement ApplyPreGamePatches

saco/game/address.h

@@ -4,3 +4,9 @@
 #define ADDR_HWND								0xC97C1C
 
 #define ADDR_KEYSTATES							0xB73458
+
+#define ADDR_GAME_STARTED						0xBA6831
+#define ADDR_ENTRY								0xC8D4C0
+
+#define ADDR_BYPASS_VIDS_USA10					0x747483
+#define ADDR_BYPASS_VIDS_EU10					0x7474D3

saco/game/game.cpp

@@ -8,6 +8,8 @@ char *szGameTextMessage;
 
 int unnamed_10150340[210];
 
+BOOL ApplyPreGamePatches();
+
 CGame::CGame()
 {
 	// TODO: CGame::CGame()
@@ -28,6 +30,8 @@ CGame::CGame()
 	field_5D = 90;
 }
 
+//-----------------------------------------------------------
+
 void CGame::InitGame()
 {
 	// Create a buffer for game text.
@@ -41,5 +45,13 @@ void CGame::InitGame()
 
 	// Init radar colors
 	GameResetRadarColors();
+
+	if(!ApplyPreGamePatches()) {
+		MessageBox(0,
+			"I can't determine your GTA version.\r\nSA-MP only supports GTA:SA v1.0 USA/EU",
+			"Version Error",MB_OK | MB_ICONEXCLAMATION);
+		ExitProcess(1);
+	}
 }
 
+//-----------------------------------------------------------

saco/game/patches.cpp

@@ -0,0 +1,130 @@
+
+#include "../main.h"
+
+DWORD dwSystemMemory;
+DWORD dwStreamingMemory;
+
+extern int iGtaVersion;
+
+//----------------------------------------------------------
+
+void UnFuckAndCheck(DWORD addr, int size, BYTE byteCheck)
+{
+	DWORD d;
+	VirtualProtect((PVOID)addr,size,PAGE_EXECUTE_READWRITE,&d);
+
+	if(byteCheck != *(PBYTE)addr) {
+#ifdef _DEBUG
+		char s[256];
+		sprintf(s,"Failed Check At Addr: 0x%X",addr);
+		OutputDebugString(s);
+#endif
+		while(byteCheck != *(PBYTE)addr) Sleep(1);
+
+		VirtualProtect((PVOID)addr,size,PAGE_EXECUTE_READWRITE,&d);
+	}
+}
+
+//----------------------------------------------------------
+
+void UnFuck(DWORD addr, int size)
+{
+	DWORD d;
+	VirtualProtect((PVOID)addr,size,PAGE_EXECUTE_READWRITE,&d);
+}
+
+//----------------------------------------------------------
+
+BOOL ApplyPreGamePatches()
+{
+	BYTE * pbyteVersionDetermination = (PBYTE)ADDR_BYPASS_VIDS_USA10;
+	int iCounter=0;
+
+	// MAIN VERSION DETERMINING LOGIC
+	while( (*pbyteVersionDetermination != 0x89) &&
+		   (*pbyteVersionDetermination != 0xC8) )
+	{
+		if (*(PBYTE)ADDR_GAME_STARTED == 1) {
+			return FALSE;
+		} else {
+			Sleep(10);
+			iCounter++;
+			if(iCounter>6000) { // 60 seconds have passed
+				return FALSE;
+			}
+		}
+	}
+
+	if(*pbyteVersionDetermination == 0x89) {
+		iGtaVersion = GTASA_VERSION_USA10;
+	} 
+	else if(*pbyteVersionDetermination == 0xC8) {
+		iGtaVersion = GTASA_VERSION_EU10;
+	}
+
+	// (skip to starting screen)
+	if(iGtaVersion == GTASA_VERSION_USA10) {
+		UnFuck(ADDR_BYPASS_VIDS_USA10,6);
+		*(BYTE *)ADDR_ENTRY = 5;
+		memset((PVOID)ADDR_BYPASS_VIDS_USA10,0x90,6);
+	}
+	else if (iGtaVersion == GTASA_VERSION_EU10) {
+		UnFuck(ADDR_BYPASS_VIDS_EU10,6);
+		*(BYTE *)ADDR_ENTRY = 5;
+		memset((PVOID)ADDR_BYPASS_VIDS_EU10,0x90,6);
+	}
+
+	// Loading screens
+	UnFuck(0x866CD8,10);
+	UnFuck(0x866CCC,10);
+	strcpy((PCHAR)0x866CD8,"title");
+	strcpy((PCHAR)0x866CCC,"title");
+
+	UnFuck(0x745B87,68);
+	memset((PVOID)0x745B87,0x90,68);
+
+	UnFuck(0x7459E1,2);
+	memset((LPVOID)0x7459E1,0x90,2);
+
+	UnFuckAndCheck(0x561872,30,0x85);
+	*(PBYTE)0x561872 = 0x33;
+	*(PBYTE)0x561873 = 0xC0;
+	memset((LPVOID)0x561874,0x90,27);
+
+	MEMORYSTATUSEX statex;
+	statex.dwLength = sizeof(statex);
+	GlobalMemoryStatusEx(&statex);
+
+	dwSystemMemory = statex.ullTotalPhys / (1024 * 1024);
+
+	if(dwSystemMemory > 4000)
+		dwStreamingMemory = 0x40000000; // 1024MB
+	else if(dwSystemMemory > 2000)
+		dwStreamingMemory = 0x20000000; // 512MB
+	else if(dwSystemMemory > 1000)
+		dwStreamingMemory = 0x10000000; // 256MB
+	else if(dwSystemMemory > 500)
+		dwStreamingMemory = 0x08000000; // 128MB
+	else
+		dwStreamingMemory = 0x06000000; // 96MB
+
+	// Modify the streaming memory hardcoded values
+	UnFuck(0x5B8E6A,4);
+	*(DWORD *)0x5B8E6A = dwStreamingMemory;
+
+	UnFuckAndCheck(0x4083C0,1,0xB8);
+	*(PBYTE)0x4083C0 = 0xC3;
+
+	UnFuck(0x590099,5);
+	memset((LPVOID)0x590099,0x90,5);
+
+	UnFuck(0x53E94C,1);
+	*(PBYTE)0x53E94C = 2;
+
+	UnFuck(0x731F60,4);
+	*(PDWORD)0x731F60 = 20000;
+
+	return TRUE;
+}
+
+//----------------------------------------------------------

saco/main.cpp

@@ -1,6 +1,8 @@
 
 #include "main.h"
 
+int				iGtaVersion=0;
+
 GAME_SETTINGS			tSettings;
 CConfig					*pConfig=0;
 CChatWindow				*pChatWindow=0;

saco/main.h

@@ -7,6 +7,10 @@
 
 #define MAX_SETTINGS_STRING		256
 
+#define GTASA_VERSION_UNKNOWN	0
+#define GTASA_VERSION_USA10		1
+#define GTASA_VERSION_EU10		2
+
 typedef struct _GAME_SETTINGS {
 	BOOL bDebug;
 	BOOL bPlayOnline;

saco/saco.vcproj

@@ -165,6 +165,9 @@
 			<File
 				RelativePath=".\game\keystuff.h">
 			</File>
+			<File
+				RelativePath=".\game\patches.cpp">
+			</File>
 			<File
 				RelativePath=".\game\scripting.cpp">
 			</File>