PFND3D10DDI_DRAWAUTO callback function

The DrawAuto function works similarly to the Draw function, except DrawAuto is used for the special case where vertex data is written through the stream-output unit and then recycled as a vertex buffer. The driver determines the number of primitives, in part, by how much data was written to the buffer through stream output.


PFND3D10DDI_DRAWAUTO Pfnd3d10ddiDrawauto;

void Pfnd3d10ddiDrawauto(



Return Value


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 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 will determine that the error is critical. Even if the device was removed, the driver is not required to return D3DDDIERR_DEVICEREMOVED; however, if device removal interfered with the operation of DrawAuto (which typically should not happen), the driver can return D3DDDIERR_DEVICEREMOVED.


Windows version Available in Windows Vista and later versions of the Windows operating systems.
Target Platform Desktop
Header d3d10umddi.h (include D3d10umddi.h)

See Also