[FSharedBuffer](API\Runtime\Core\Memory\FSharedBuffer) ProcessMipLevel ( const [FEncodedTextureDescription](API\Developer\TextureFormat\Interfaces\FEncodedTextureDescription) & InTextureDescription, const [FEncodedTextureExtendedData](API\Developer\TextureFormat\Interfaces\FEncodedTextureExtendedData) & InExtendedData, [TArrayView](API\Runtime\Core\Containers\TArrayView)< FMemoryView > InLinearSurfaces, int32 InMipIndex ) const