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CreateQuery(D3D10) routine

The CreateQuery(D3D10) function creates a query.

Syntax


PFND3D10DDI_CREATEQUERY CreateQuery;

VOID APIENTRY CreateQuery(
  _In_  D3D10DDI_HDEVICE hDevice,
  _In_  const D3D10DDIARG_CREATEQUERY *pCreateQuery,
  _In_  D3D10DDI_HQUERY hQuery,
  _In_  D3D10DDI_HRTQUERY hRTQuery
)
{ ... }

Parameters

hDevice [in]

A handle to the display device (graphics context).

pCreateQuery [in]

A pointer to a D3D10DDIARG_CREATEQUERY structure that describes the parameters that the user-mode display driver uses to create a query.

hQuery [in]

A handle to the driver's private data for the query. The driver returns the size, in bytes, of the memory region that the Microsoft Direct3D runtime must allocate for the private data from a call to the driver's CalcPrivateQuerySize function. The handle is really just a pointer to a region of memory, the size of which the driver requested. The driver uses this region of memory to store internal data structures that are related to its query object.

hRTQuery [in]

A handle to the query that the driver should use anytime it calls back into the Direct3D runtime.

Return value

None

The driver can use the pfnSetErrorCb callback function to set an error code. For more information about setting error codes, see the following Remarks section.

Remarks

The driver might run out of memory or be unable to create queries because of their exclusive nature. Therefore, the driver can pass E_OUTOFMEMORY, DXGI_DDI_ERR_NONEXCLUSIVE, or D3DDDIERR_DEVICEREMOVED in a call to the pfnSetErrorCb function. The Direct3D runtime will determine that any other errors are critical. If the driver passes any errors, including D3DDDIERR_DEVICEREMOVED, the Direct3D runtime will determine that the handle is invalid; therefore, the runtime will not call the DestroyQuery(D3D10) function to destroy the handle that the hQuery parameter specifies.

Requirements

Version

Available in Windows Vista and later versions of the Windows operating systems.

Header

D3d10umddi.h (include D3d10umddi.h)

See also

CalcPrivateQuerySize
D3D10DDI_DEVICEFUNCS
D3D10DDIARG_CREATEQUERY
DestroyQuery(D3D10)
pfnSetErrorCb

 

 

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