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DirectX 9.0 and later versions only.
One or more D3DHAL_DP2ISSUEQUERY structures are parsed from the command buffer by the D3dDrawPrimitives2 callback when the D3DHAL_DP2COMMAND structure's bCommand member is set to D3DDP2OP_ISSUEQUERY, and are used to query for various types of information.
Syntax
typedef struct _D3DHAL_DP2ISSUEQUERY {
DWORD dwQueryID;
DWORD dwFlags;
} D3DHAL_DP2ISSUEQUERY;
Members
dwQueryID
Identifies the query for which the driver asynchronously provides information.
dwFlags
Specifies the state of the query. This member can contain one or more of the following flags:
| Value | Meaning |
|---|---|
| D3DISSUE_BEGIN (1 << 1) | Starts building the query. The runtime does not request query data while in this state. |
| D3DISSUE_END (1 << 0) | Transitions the state to subsignaled. Results of the query are not available until the state transitions to signaled. |
The driver can ignore query requests with dwFlags set to 0.
Remarks
The runtime uses D3DHAL_DP2ISSUEQUERY to identify each query that the driver must process. The driver's D3dDrawPrimitives2 callback must process wPrimitiveCount D3DHAL_DP2ISSUEQUERY structures from the command buffer. The value of wPrimitiveCount is specified in the D3DHAL_DP2COMMAND structure. The driver parses these structures and retrieves information associated with the queries that they represent.
Requirements
| Requirement | Value |
|---|---|
| Header | d3dhal.h (include D3dhal.h) |
See also
D3DDP2OP_ISSUEQUERY