PFND3D11DDI_DRAWINDEXEDINSTANCEDINDIRECT callback function

The DrawIndexedInstancedIndirect function draws particular instances of indexed primitives.

Syntax


PFND3D11DDI_DRAWINDEXEDINSTANCEDINDIRECT DrawIndexedInstancedIndirect;

VOID  APIENTRY DrawIndexedInstancedIndirect(
   D3D10DDI_HDEVICE   hDevice,
   D3D10DDI_HRESOURCE hBufferForArgs,
   UINT               AlignedByteOffsetForArgs
)
{ ... }

Parameters

hDevice

A handle to the display device (graphics context).

hBufferForArgs

A handle to a buffer that contains the arguments for DrawIndexedInstancedIndirect to process. The buffer contains the following tightly packed structure:


struct DrawIndexedInstancedIndirectArgs {
  UINT IndexCountPerInstance; 
  UINT InstanceCount;
  UINT StartIndexLocation;
  INT BaseVertexLocation;
  UINT StartInstanceLocation;
}

For more information about these arguments, see the DrawIndexedInstanced reference page.

AlignedByteOffsetForArgs

The offset, in bytes, into the buffer that hBufferForArgs specifies. AlignedByteOffsetForArgs must be a multiple of 4.

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.

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

Remarks

The DrawIndexedInstancedIndirect function performs the same task as the call to the driver's DrawIndexedInstanced function. However, DrawIndexedInstancedIndirect obtains information about the index primitives from the contents of the buffer that the hBufferForArgs parameter specifies. DrawIndexedInstancedIndirect reads the contents of the buffer, starting at the byte offset that the AlignedByteOffsetForArgs parameter specifies.

When the Direct3D runtime calls the driver's CreateResource(D3D11) function to create the buffer resource that the hBufferForArgs parameter specifies, the runtime must set the D3D11_DDI_RESOURCE_MISC_DRAWINDIRECT_ARGS flag in the MiscFlags member of the D3D11DDIARG_CREATERESOURCE structure.

The driver should not encounter any error, except for D3DDDIERR_DEVICEREMOVED. Therefore, if the driver passes any error, except for D3DDDIERR_DEVICEREMOVED, in a call to the pfnSetErrorCb function, the Direct3D runtime determines that the error is critical. Even if the device is removed, the driver is not required to return D3DDDIERR_DEVICEREMOVED; however, if device removal interferes with the operation of DrawIndexedInstancedIndirect (which typically should not happen), the driver can return D3DDDIERR_DEVICEREMOVED.

Requirements

Target platform

Version

DrawIndexedInstancedIndirect is supported beginning with the Windows 7 operating system.

Header

D3d10umddi.h (include D3d10umddi.h)

See also

CreateResource(D3D11)
D3D11DDI_DEVICEFUNCS
D3D11DDIARG_CREATERESOURCE
DrawIndexedInstanced
pfnSetErrorCb

 

 

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