static int32 GetNumStreamingMipsDirect ( int32 InNumMips, bool bInCubeMap, bool bInVolumeTexture, bool bInTextureArray, const [FEncodedTextureExtendedData](API\Developer\TextureFormat\Interfaces\FEncodedTextureExtendedData) * InExtendedData, const [FTextureEngineParameters](API\Developer\TextureFormat\Interfaces\FTextureEngineParameters) & InEngineParameters )