Source code of Windows XP (NT5)
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#ifndef _D3DHALEX_H
#define _D3DHALEX_H
//-----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All Rights Reserved.
//
// File: d3dhalex.h
// Content: Direct3D HAL Extensions and Helpers include file
// This file contains definitions and macros which although not
// essential for building a driver are useful helpers and
// utilities.
//
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
//
// Macros to help with handling the new GetDriverInfo2 mechanism. The following
// macros assist with handling the GetDriverInfo2 sub-call of GetDriverInfo.
// Two of the macros are simplified ways of differentiating between
// GetDriverInfo2 calls and DDStereoMode calls. The others are simplified ways
// of getting the data structures associated with those two calls.
//
// The following code fragment demonstrates how to handle GetDriverInfo2 using
// these macros. Compare this with the code fragment in d3dhal.h
//
// D3DCAPS8 myD3DCaps8;
//
// DWORD CALLBACK
// DdGetDriverInfo(LPDDHAL_GETDRIVERINFODATA lpData)
// {
// if (MATCH_GUID((lpData->guidInfo), GUID_GetDriverInfo2) )
// {
// ASSERT(NULL != lpData);
// ASSERT(NULL != lpData->lpvData);
//
// // Is this a call to GetDriverInfo2 or DDStereoMode?
// if (D3DGDI_IS_GDI2(lpData))
// {
// // Yes, its a call to GetDriverInfo2, fetch the
// // DD_GETDRIVERINFO2DATA data structure.
// DD_GETDRIVERINFO2DATA* pgdi2 = D3DGDI_GET_GDI2_DATA(lpData);
// ASSERT(NULL != pgdi2);
//
// // What type of request is this?
// switch (pgdi2->dwType)
// {
// case D3DGDI2_TYPE_GETD3DCAPS8:
// {
// // The runtime is requesting the DX8 D3D caps so
// // copy them over now.
//
// // It should be noted that the dwExpectedSize field
// // of DD_GETDRIVERINFODATA is not used for
// // GetDriverInfo2 calls and should be ignored.
// size_t copySize = min(sizeof(myD3DCaps8), pgdi2->dwExpectedSize);
// memcpy(lpData->lpvData, &myD3DCaps8, copySize);
// lpData->dwActualSize = copySize;
// lpData->ddRVal = DD_OK;
// return DDHAL_DRIVER_HANDLED;
// }
// default:
// // For any other GetDriverInfo2 types not handled
// // or understood by the driver set an ddRVal of
// // DDERR_CURRENTLYNOTAVAIL and return
// // DDHAL_DRIVER_HANDLED.
// return DDHAL_DRIVER_HANDLED;
// }
// }
// else
// {
// // It must be a call a request for stereo mode support.
// // Fetch the stereo mode data
// DD_STEREOMODE* pStereoMode = D3DGDI_GET_STEREOMODE_DATA(pData);
// ASSERT(NULL != pStereoMode);
//
// // Process the stereo mode request...
// lpData->dwActualSize = sizeof(DD_STEREOMODE);
// lpData->ddRVal = DD_OK;
// return DDHAL_DRIVER_HANDLED;
// }
// }
//
// // Handle any other device GUIDs...
//
// } // DdGetDriverInfo
//
//-----------------------------------------------------------------------------
//
// Macros to determine what type of call a call to GetDriverInfo with the
// GUID GUID_GetDriverInfo2/GUID_DDStereoMode. A GetDriverInfo2 call or
// a DDStereoMode call.
//
#define D3DGDI_IS_GDI2(pData) \
((((DD_GETDRIVERINFO2DATA*)(pData->lpvData))->dwMagic) == D3DGDI2_MAGIC)
#define D3DGDI_IS_STEREOMODE(pData) \
((((DD_STEREOMODE*) (pData->lpvData))->dwHeight) != D3DGDI2_MAGIC)
//
// Macros to return the appropriate GetDriverInfo data structure for a
// call to GetDriverInfo with the GUID GUID_GetDriverInfo2/GUID_DDStereoMode.
//
#define D3DGDI_GET_GDI2_DATA(pData) \
(D3DGDI_IS_GDI2(pData) ? (((DD_GETDRIVERINFO2DATA*)(pData->lpvData))) : NULL)
#define D3DGDI_GET_STEREOMODE_DATA(pData) \
(D3DGDI_IS_STEREOMODE(pData) ? (((DD_STEREOMODE*)(pData->lpvData))) : NULL)
#endif /* _D3DHALEX_H */
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