DD_GETD3DQUERYDATA structure (d3dhal.h)

DirectX 9.0 and later versions only.

DD_GETD3DQUERYDATA is the data structure pointed to by the lpvData field of DD_GETDRIVERINFODATA for DD_GETDRIVERINFO2DATA queries with the type D3DGDI2_TYPE_GETD3DQUERY.

Syntax

typedef struct _DD_GETD3DQUERYDATA {
  DD_GETDRIVERINFO2DATA gdi2;
  union {
    DWORD        dwQueryIndex;
    D3DQUERYTYPE QueryType;
  };
} DD_GETD3DQUERYDATA;

Members

gdi2

Specifies a DD_GETDRIVERINFO2DATA structure that contains the GetDriverInfo2 data.

dwQueryIndex

Specifies the index of the query type to return.

QueryType

Receives a value from the D3DQUERYTYPE enumeration that specifies the actual query capability.

Remarks

The runtime identifies the query type to be returned with an integer index whose value varies between zero and one less than the number of supported query types that were reported earlier by the driver in a D3DGDI2_TYPE_GETD3DQUERYCOUNT query. How these indices are mapped to actual query types is left to the driver. However, each index must map uniquely to one supported query type. The order in which the query types are reported is not significant.

When processing this GetDriverInfo2 request the driver should read the value in the union as if it were the dwQueryIndex member and map that value to one of the supported query types (probably by using the value in dwQueryIndex as an index into an array of D3DQUERYTYPE values). The driver should then copy that query type into the union as if it were the QueryType member. The runtime guarantees that it only passes an index to the driver that is in the range zero to one less than the number of query types reported by the driver. The range of the index should be validated in the debug driver build.

For more information about D3DQUERYTYPE, see the DirectX SDK documentation.

Requirements

Requirement	Value
Header	d3dhal.h (include D3dhal.h)

See also

D3DDP2OP_CREATEQUERY

DD_GETD3DQUERYCOUNTDATA

DD_GETDRIVERINFO2DATA

DD_GETDRIVERINFODATA