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boost/gil/extension/toolbox/metafunctions/pixel_bit_size.hpp

//
// 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_PIXEL_BIT_SIZE_HPP
#define BOOST_GIL_EXTENSION_TOOLBOX_METAFUNCTIONS_PIXEL_BIT_SIZE_HPP

#include <boost/gil/bit_aligned_pixel_reference.hpp>
#include <boost/gil/packed_pixel.hpp>

#include <boost/mpl/accumulate.hpp>
#include <boost/mpl/int.hpp>

namespace boost{ namespace gil {

/// pixel_bit_size metafunctions
/// \brief Accumulates the all channel size.
///
/// \code
/// typedef bit_aligned_image5_type< 16, 16, 16, 8, 8, devicen_layout_t< 5 > >::type image_t;
/// const int size = pixel_bit_size<image_t::view_t::reference>::value;
/// \endcode
template< typename PixelRef >
struct pixel_bit_size : mpl::int_<0> {};

template <typename B, typename C, typename L, bool M>
struct pixel_bit_size<bit_aligned_pixel_reference<B,C,L,M> > : mpl::int_< mpl::accumulate< C, mpl::int_<0>, mpl::plus<mpl::_1, mpl::_2> >::type::value >{};

template <typename B, typename C, typename L, bool M>
struct pixel_bit_size<const bit_aligned_pixel_reference<B,C,L,M> > : mpl::int_< mpl::accumulate< C, mpl::int_<0>, mpl::plus<mpl::_1, mpl::_2> >::type::value >{};

template <typename B, typename C, typename L>
struct pixel_bit_size<packed_pixel<B,C,L> > : mpl::int_< mpl::accumulate< C, mpl::int_<0>, mpl::plus<mpl::_1, mpl::_2> >::type::value >{};

template <typename B, typename C, typename L>
struct pixel_bit_size<const packed_pixel<B,C,L> > : mpl::int_< mpl::accumulate< C, mpl::int_<0>, mpl::plus<mpl::_1, mpl::_2> >::type::value >{};

} // namespace gil
} // namespace boost

#endif