void ImageMipmap_PrepareScratch ( [Image](API\Plugins\MutableRuntime\MuR\Image) * Dest, const [Image](API\Plugins\MutableRuntime\MuR\Image) * Base, int32 LevelCount, [FScratchImageMipmap](API\Plugins\MutableRuntime\MuR\FImageOperator\FScratchImageMipmap) & )