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