// d3dumddi.h

PFND3DDDI_GENERATEMIPSUBLEVELS Pfnd3dddiGeneratemipsublevels;

HRESULT Pfnd3dddiGeneratemipsublevels(
  HANDLE hDevice,
  const D3DDDIARG_GENERATEMIPSUBLEVELS *unnamedParam2
)
{...}
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Windows Driver Kit DDI reference (nc-d3dumddi-pfnd3dddi_generatemipsublevels)

PFND3DDDI_GENERATEMIPSUBLEVELS callback function

Description

The GenerateMipSubLevels function regenerates the sublevels of a MIP-map texture.

Parameters

`hDevice`

A handle to the display device (graphics context).

`unnamedParam2`

pData [in]

A pointer to a D3DDDIARG_GENERATEMIPSUBLEVELS structure that describes how to generate the sublevels of a MIP-map texture.

Return value

GenerateMipSubLevels returns S_OK or an appropriate error result if the sublevels of a MIP-map texture are not successfully generated.

Remarks

After the user-mode display driver performs an operation that accesses only the top level of a MIP-map texture, the Microsoft Direct3D runtime calls the driver's GenerateMipSubLevels function to notify the driver to automatically regenerate the sublevels of the MIP-map texture by using a specific filter type.

PFND3DDDI_GENERATEMIPSUBLEVELS - NtDoc