PFND3D11DDI_SETRESOURCEMINLOD callback function (d3d10umddi.h)

Article
02/22/2024

The SetResourceMinLOD function sets the minimum level of detail (LOD) for a resource.

Syntax

PFND3D11DDI_SETRESOURCEMINLOD Pfnd3d11ddiSetresourceminlod;

void Pfnd3d11ddiSetresourceminlod(
  D3D10DDI_HDEVICE unnamedParam1,
  D3D10DDI_HRESOURCE unnamedParam2,
  FLOAT unnamedParam3
)
{...}

Parameters

unnamedParam1

hDevice [in]

A handle to the display device (graphics context).

unnamedParam2

hResource [in]

A handle to the driver's private data for the resource.

unnamedParam3

MinLOD [in]

A single-precision float vector to set for the minimum level of detail (LOD) for the resource.

Return value

None

Remarks

The driver can use the pfnSetErrorCb callback function to set an error code.

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 SetResourceMinLOD (which typically should not happen), the driver can return D3DDDIERR_DEVICEREMOVED.

The Direct3D runtime calls the driver's SetResourceMinLOD function to set the minimum LOD (that is, the lowest MIP map) that a shader can sample from. This minimum LOD is ignored for some operations like for the operation that the driver's ResourceCopy function performs.

Requirements

Requirement	Value
Minimum supported client	SetResourceMinLOD is supported beginning with the Windows 7 operating system.
Target Platform	Desktop
Header	d3d10umddi.h (include D3d10umddi.h)