boost::gil::packed_pixel::packed_pixel

packed_pixel() = default;

explicit
packed_pixel(BitField const& bitfield);

template<typename Pixel>
packed_pixel(Pixel const& p)
requires is_pixel<Pixel>::value;

packed_pixel(
    int chan0,
    int chan1);

packed_pixel(
    int chan0,
    int chan1,
    int chan2);

packed_pixel(
    int chan0,
    int chan1,
    int chan2,
    int chan3);

packed_pixel(
    int chan0,
    int chan1,
    int chan2,
    int chan3,
    int chan4);