// // Copyright 2012 Christian Henning, Andreas Pokorny, Lubomir Bourdev // // Distributed under the Boost Software License, Version 1.0 // See accompanying file LICENSE_1_0.txt or copy at // http://www.boost.org/LICENSE_1_0.txt // #ifndef BOOST_GIL_EXTENSION_TOOLBOX_METAFUNCTIONS_GET_NUM_BITS_HPP #define BOOST_GIL_EXTENSION_TOOLBOX_METAFUNCTIONS_GET_NUM_BITS_HPP #include <boost/gil/channel.hpp> #include <boost/gil/detail/is_channel_integral.hpp> #include <boost/gil/detail/mp11.hpp> #include <type_traits> namespace boost{ namespace gil { /// get_num_bits metafunctions /// \brief Determines the numbers of bits for the given channel type. template <typename T, class = void> struct get_num_bits; template<typename B, int I, int S, bool M> struct get_num_bits<packed_channel_reference<B, I, S, M>> : std::integral_constant<int, S> {}; template<typename B, int I, int S, bool M> struct get_num_bits<packed_channel_reference<B, I, S, M> const> : std::integral_constant<int, S> {}; template<typename B, int I, bool M> struct get_num_bits<packed_dynamic_channel_reference<B, I, M>> : std::integral_constant<int, I> {}; template<typename B, int I, bool M> struct get_num_bits<packed_dynamic_channel_reference<B, I, M> const> : std::integral_constant<int, I> {}; template<int N> struct get_num_bits<packed_channel_value<N>> : std::integral_constant<int, N> {}; template<int N> struct get_num_bits<packed_channel_value<N> const> : std::integral_constant<int, N> {}; template <typename T> struct get_num_bits < T, typename std::enable_if < mp11::mp_and < detail::is_channel_integral<T>, mp11::mp_not<std::is_class<T>> >::value >::type > : std::integral_constant<std::size_t, sizeof(T) * 8> {}; }} // namespace boost::gil #endif