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// *******************************************************************************
// *
// * Module Name:
// * NPClientWraps.cpp
// *
// * Software Engineer:
// * Doyle Nickless - GoFlight Inc., for Eye Control Technology.
// *
// * Abstract:
// * This module implements the wrapper code for interfacing to the NaturalPoint
// * Game Client API. Developers of client apps can include this module into
// * their projects to simplify communication with the NaturalPoint software.
// *
// * This is necessary since the NPClient DLL is run-time linked rather than
// * load-time linked, avoiding the need to link a static library into the
// * client program (only this module is needed, and can be supplied in source
// * form.)
// *
// * Environment:
// * User mode
// *
// *******************************************************************************
//
#include "Text.h"
#include "Types.h"
#include "NPClient.h"
#include "NPClientWraps.h"
/////////////
// Defines ///////////////////////////////////////////////////////////////////////
/////////////
//
/////////////////
// Global Data ///////////////////////////////////////////////////////////////////
/////////////////
//
PF_NP_REGISTERWINDOWHANDLE gpfNP_RegisterWindowHandle = NULL;
PF_NP_UNREGISTERWINDOWHANDLE gpfNP_UnregisterWindowHandle = NULL;
PF_NP_REGISTERPROGRAMPROFILEID gpfNP_RegisterProgramProfileID = NULL;
PF_NP_QUERYVERSION gpfNP_QueryVersion = NULL;
PF_NP_REQUESTDATA gpfNP_RequestData = NULL;
PF_NP_GETSIGNATURE gpfNP_GetSignature = NULL;
PF_NP_GETDATA gpfNP_GetData = NULL;
PF_NP_STARTCURSOR gpfNP_StartCursor = NULL;
PF_NP_STOPCURSOR gpfNP_StopCursor = NULL;
PF_NP_RECENTER gpfNP_ReCenter = NULL;
PF_NP_STARTDATATRANSMISSION gpfNP_StartDataTransmission = NULL;
PF_NP_STOPDATATRANSMISSION gpfNP_StopDataTransmission = NULL;
HMODULE ghNPClientDLL = (HMODULE)NULL;
////////////////////////////////////////////////////
// NaturalPoint Game Client API function wrappers /////////////////////////////
////////////////////////////////////////////////////
//
NPRESULT __stdcall NP_RegisterWindowHandle( HWND hWnd )
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_RegisterWindowHandle )
result = (*gpfNP_RegisterWindowHandle)( hWnd );
return result;
} // NP_RegisterWindowHandle()
NPRESULT __stdcall NP_UnregisterWindowHandle()
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_UnregisterWindowHandle )
result = (*gpfNP_UnregisterWindowHandle)();
return result;
} // NP_UnregisterWindowHandle()
NPRESULT __stdcall NP_RegisterProgramProfileID( unsigned short wPPID )
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_RegisterProgramProfileID )
result = (*gpfNP_RegisterProgramProfileID)( wPPID );
return result;
} // NP_RegisterProgramProfileID()
NPRESULT __stdcall NP_QueryVersion( unsigned short* pwVersion )
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_QueryVersion )
result = (*gpfNP_QueryVersion)( pwVersion );
return result;
} // NP_QueryVersion()
NPRESULT __stdcall NP_RequestData( unsigned short wDataReq )
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_RequestData )
result = (*gpfNP_RequestData)( wDataReq );
return result;
} // NP_RequestData()
NPRESULT __stdcall NP_GetSignature( LPTRACKIRSIGNATURE pSignature )
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_GetSignature )
result = (*gpfNP_GetSignature)( pSignature );
return result;
} // NP_GetSignature()
NPRESULT __stdcall NP_GetData( LPTRACKIRDATA pTID )
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_GetData )
result = (*gpfNP_GetData)( pTID );
return result;
} // NP_GetData()
NPRESULT __stdcall NP_StartCursor()
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_StartCursor )
result = (*gpfNP_StartCursor)();
return result;
} // NP_StartCursor()
NPRESULT __stdcall NP_StopCursor()
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_StopCursor )
result = (*gpfNP_StopCursor)();
return result;
} // NP_StopCursor()
NPRESULT __stdcall NP_ReCenter()
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_ReCenter )
result = (*gpfNP_ReCenter)();
return result;
} // NP_ReCenter()
NPRESULT __stdcall NP_StartDataTransmission()
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_StartDataTransmission )
result = (*gpfNP_StartDataTransmission)();
return result;
} // NP_StartDataTransmission()
NPRESULT __stdcall NP_StopDataTransmission()
{
NPRESULT result = NP_ERR_DLL_NOT_FOUND;
if( NULL != gpfNP_StopDataTransmission )
result = (*gpfNP_StopDataTransmission)();
return result;
} // NP_StopDataTransmission()
//////////////////////////////////////////////////////////////////////////////
// NPClientInit() -- Loads the DLL and retrieves pointers to all exports
//
NPRESULT NPClient_Init( const char* csDLLPath )
{
NPRESULT result = NP_OK;
Text csNPClientDLLFullPath;
if (csDLLPath && *csDLLPath)
csNPClientDLLFullPath = Text(csDLLPath) + "\\";
csNPClientDLLFullPath += "NPClient.dll";
ghNPClientDLL = ::LoadLibrary( csNPClientDLLFullPath.data() );
if (NULL != ghNPClientDLL) {
// verify the dll signature
gpfNP_GetSignature = (PF_NP_GETSIGNATURE)::GetProcAddress( ghNPClientDLL, "NP_GetSignature" );
SIGNATUREDATA pSignature;
SIGNATUREDATA verifySignature;
// init the signatures
strcpy_s(verifySignature.DllSignature, "precise head tracking\n put your head into the game\n now go look around\n\n Copyright EyeControl Technologies");
strcpy_s(verifySignature.AppSignature, "hardware camera\n software processing data\n track user movement\n\n Copyright EyeControl Technologies");
// query the dll and compare the results
NPRESULT vresult = NP_GetSignature( &pSignature );
if( vresult == NP_OK )
{
if ((strcmp(verifySignature.DllSignature,pSignature.DllSignature)==0)
&& (strcmp(verifySignature.AppSignature,pSignature.AppSignature)==0))
{
result = NP_OK;
// Get addresses of all exported functions
gpfNP_RegisterWindowHandle = (PF_NP_REGISTERWINDOWHANDLE)::GetProcAddress( ghNPClientDLL, "NP_RegisterWindowHandle" );
gpfNP_UnregisterWindowHandle = (PF_NP_UNREGISTERWINDOWHANDLE)::GetProcAddress( ghNPClientDLL, "NP_UnregisterWindowHandle" );
gpfNP_RegisterProgramProfileID = (PF_NP_REGISTERPROGRAMPROFILEID)::GetProcAddress( ghNPClientDLL, "NP_RegisterProgramProfileID" );
gpfNP_QueryVersion = (PF_NP_QUERYVERSION)::GetProcAddress( ghNPClientDLL, "NP_QueryVersion" );
gpfNP_RequestData = (PF_NP_REQUESTDATA)::GetProcAddress( ghNPClientDLL, "NP_RequestData" );
gpfNP_GetData = (PF_NP_GETDATA)::GetProcAddress( ghNPClientDLL, "NP_GetData" );
gpfNP_StartCursor = (PF_NP_STARTCURSOR)::GetProcAddress( ghNPClientDLL, "NP_StartCursor" );
gpfNP_StopCursor = (PF_NP_STOPCURSOR)::GetProcAddress( ghNPClientDLL, "NP_StopCursor" );
gpfNP_ReCenter = (PF_NP_RECENTER)::GetProcAddress( ghNPClientDLL, "NP_ReCenter" );
gpfNP_StartDataTransmission = (PF_NP_STARTDATATRANSMISSION)::GetProcAddress( ghNPClientDLL, "NP_StartDataTransmission" );
gpfNP_StopDataTransmission = (PF_NP_STOPDATATRANSMISSION)::GetProcAddress( ghNPClientDLL, "NP_StopDataTransmission" );
}
else
{
result = NP_ERR_DLL_NOT_FOUND;
}
}
else
{
result = NP_ERR_DLL_NOT_FOUND;
}
}
else
result = NP_ERR_DLL_NOT_FOUND;
return result;
} // NPClient_Init()
//////////////////////////////////////////////////////////////////////////////
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