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/*
Copyright 2012 Christian Henning, Andreas Pokorny, Lubomir Bourdev
Use, modification and distribution are subject to 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
////////////////////////////////////////////////////////////////////////////////////////
/// \file get_num_bits.hpp
/// \brief get_num_bits metafunction.
/// \author Christian Henning, Andreas Pokorny, Lubomir Bourdev \n
///
/// \date 2012 \n
///
////////////////////////////////////////////////////////////////////////////////////////
#include <boost/gil/channel.hpp>
#include <boost/mpl/int.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/type_traits/is_class.hpp>
#include <boost/utility/enable_if.hpp>
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 > > : mpl::int_< S >
{};
template< typename B, int I, int S, bool M >
struct get_num_bits< const packed_channel_reference< B, I, S, M > > : mpl::int_< S >
{};
template<typename B, int I, bool M>
struct get_num_bits< packed_dynamic_channel_reference< B, I, M > > : mpl::int_< I >
{};
template<typename B, int I, bool M>
struct get_num_bits< const packed_dynamic_channel_reference< B, I, M > > : mpl::int_< I >
{};
template< int N >
struct get_num_bits< packed_channel_value< N > > : mpl::int_< N >
{};
template< int N >
struct get_num_bits< const packed_channel_value< N > > : mpl::int_< N >
{};
template< typename T >
struct get_num_bits< T
, typename enable_if< mpl::and_< is_integral< T >
, mpl::not_< is_class< T > >
>
>::type
> : mpl::int_< sizeof(T) * 8 >
{};
} // namespace gil
} // namespace boost
#endif // BOOST_GIL_EXTENSION_TOOLBOX_METAFUNCTIONS_GET_NUM_BITS_HPP
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