Make IDirectInputDevice::Poll() not treat non-zero success codes as e…

…rrors

source/SilentPatchNFS90s.cpp

@@ -247,6 +247,19 @@ __declspec(naked) void NFS2SE_MouseZeroEax()
  }
 }
 
+__declspec(naked) void NFS4_PollZeroEdi()
+{
+ // if (edi >= 0) edi = 0;
+ _asm
+ {
+ mov edi, eax
+ sar edi, 31
+ and edi, eax
+ test edi, edi
+ ret
+ }
+}
+
 
 void OnInitializeHook()
 {
@@ -384,6 +397,28 @@ void OnInitializeHook()
  }
  TXN_CATCH();
 
+
+ // NFS2SE/NFS3: Make IDirectInputDevice::Poll() not treat non-zero success codes as errors
+ try
+ {
+ auto poll = get_pattern("FF 52 64 85 C0 74 ? 3D 1E 00 07 80", 3 + 2);
+
+ // je -> jge
+ Patch<uint8_t>(poll, 0x7D);
+ }
+ TXN_CATCH();
+
+
+ // NFS4: Make IDirectInputDevice::Poll() not treat non-zero success codes as errors
+ try
+ {
+ auto poll = get_pattern("8B 7D F4 85 FF 74 ? 81 7D F4 1E 00 07 80");
+
+ // 'flatten' edi not to contain positive numbers
+ InjectHook(poll, NFS4_PollZeroEdi, HookType::Call);
+ }
+ TXN_CATCH();
+
 
  // NFS2SE/NFS4: Re-enable Alt+F4
  try