private void OverrideFunctions()
{
// List of functions in the IDirectInputDevice8 interface:
// 0: STDMETHOD(QueryInterface)(THIS_ REFIID riid, LPVOID * ppvObj) PURE;
// 1: STDMETHOD_(ULONG,AddRef)(THIS) PURE;
// 2: STDMETHOD_(ULONG,Release)(THIS) PURE;
// 3: STDMETHOD(GetCapabilities)(THIS_ LPDIDEVCAPS) PURE;
// 4: STDMETHOD(EnumObjects)(THIS_ LPDIENUMDEVICEOBJECTSCALLBACKA,LPVOID,DWORD) PURE;
// 5: STDMETHOD(GetProperty)(THIS_ REFGUID,LPDIPROPHEADER) PURE;
// 6: STDMETHOD(SetProperty)(THIS_ REFGUID,LPCDIPROPHEADER) PURE;
// 7: STDMETHOD(Acquire)(THIS) PURE;
// 8: STDMETHOD(Unacquire)(THIS) PURE;
// 9: STDMETHOD(GetDeviceState)(THIS_ DWORD,LPVOID) PURE;
// 10: STDMETHOD(GetDeviceData)(THIS_ DWORD,LPDIDEVICEOBJECTDATA,LPDWORD,DWORD) PURE;
// 11: STDMETHOD(SetDataFormat)(THIS_ LPCDIDATAFORMAT) PURE;
// 12: STDMETHOD(SetEventNotification)(THIS_ HANDLE) PURE;
// 13: STDMETHOD(SetCooperativeLevel)(THIS_ HWND,DWORD) PURE;
// 14: STDMETHOD(GetObjectInfo)(THIS_ LPDIDEVICEOBJECTINSTANCEA,DWORD,DWORD) PURE;
// 15: STDMETHOD(GetDeviceInfo)(THIS_ LPDIDEVICEINSTANCEA) PURE;
// 16: STDMETHOD(RunControlPanel)(THIS_ HWND,DWORD) PURE;
// 17: STDMETHOD(Initialize)(THIS_ HINSTANCE,DWORD,REFGUID) PURE;
// 18: STDMETHOD(CreateEffect)(THIS_ REFGUID,LPCDIEFFECT,LPDIRECTINPUTEFFECT *,LPUNKNOWN) PURE;
// 19: STDMETHOD(EnumEffects)(THIS_ LPDIENUMEFFECTSCALLBACKA,LPVOID,DWORD) PURE;
// 20: STDMETHOD(GetEffectInfo)(THIS_ LPDIEFFECTINFOA,REFGUID) PURE;
// 21: STDMETHOD(GetForceFeedbackState)(THIS_ LPDWORD) PURE;
// 22: STDMETHOD(SendForceFeedbackCommand)(THIS_ DWORD) PURE;
// 23: STDMETHOD(EnumCreatedEffectObjects)(THIS_ LPDIENUMCREATEDEFFECTOBJECTSCALLBACK,LPVOID,DWORD) PURE;
// 24: STDMETHOD(Escape)(THIS_ LPDIEFFESCAPE) PURE;
// 25: STDMETHOD(Poll)(THIS) PURE;
// 26: STDMETHOD(SendDeviceData)(THIS_ DWORD,LPCDIDEVICEOBJECTDATA,LPDWORD,DWORD) PURE;
// 27: STDMETHOD(EnumEffectsInFile)(THIS_ LPCSTR,LPDIENUMEFFECTSINFILECALLBACK,LPVOID,DWORD) PURE;
// 28: STDMETHOD(WriteEffectToFile)(THIS_ LPCSTR,DWORD,LPDIFILEEFFECT,DWORD) PURE;
// 29: STDMETHOD(BuildActionMap)(THIS_ LPDIACTIONFORMATA,LPCSTR,DWORD) PURE;
// 30: STDMETHOD(SetActionMap)(THIS_ LPDIACTIONFORMATA,LPCSTR,DWORD) PURE;
// 31: STDMETHOD(GetImageInfo)(THIS_ LPDIDEVICEIMAGEINFOHEADERA) PURE;
oldGetDeviceState = Device->vtable[9];
del_gds = new DGetDeviceState(GetDeviceState);
IntPtr ptr = Marshal.GetFunctionPointerForDelegate(del_gds);
Device->vtable[9] = ptr;
oldSetCooperativeLevel = Device->vtable[13];
del_scl = new DSetCooperativeLevel(SetCooperativeLevel);
ptr = Marshal.GetFunctionPointerForDelegate(del_scl);
Device->vtable[13] = ptr;
}
public unsafe int GetDeviceState(DirectInput8.IDirectInputDevice8 *This, UInt32 cbData, IntPtr lpData)
{
DGetDeviceState del = (DGetDeviceState)Marshal.GetDelegateForFunctionPointer(oldGetDeviceState, typeof(DGetDeviceState));
int rv = del(This, cbData, lpData);
/* XXXX: HACK!! 20 is the size of mouse data... Hopefully it isn't the size of anything else we care about. */
if (cbData == 20)
{
DirectInput8.DIMOUSESTATE2 *ms = (DirectInput8.DIMOUSESTATE2 *)lpData;
Process p = Process.GetCurrentProcess();
/* We only care when we go from not clicked to clicked... */
if (buttonState == 0 && ms->rgbButtons_0 != 0)
{
User32.RECT wndRect = new User32.RECT();
User32.POINT point = new User32.POINT();
User32.GetWindowRect(p.MainWindowHandle, ref wndRect);
User32.GetCursorPos(out point);
/* Check bounds. */
if (point.X < wndRect.Left || point.X > wndRect.Right || point.Y < wndRect.Top || point.Y > wndRect.Bottom)
{
ms->rgbButtons_0 = 0;
ms->rgbButtons_1 = 0;
}
}
buttonState = ms->rgbButtons_0;
}
/* La de dah... Imma collect some garbage now. */
GC.Collect();
return(rv);
}
