FM / metafunctions

/usr/include/boost/gil/extension/toolbox/metafunctions/

/usr/include/boost/gil/extension/toolbox/metafunctions

Name	Size	Mode	Actions
channel_type.hpp	3419	0644	edit dl rm
channel_view.hpp	1578	0644	edit dl rm
get_num_bits.hpp	1865	0644	edit dl rm
get_pixel_type.hpp	1146	0644	edit dl rm
is_bit_aligned.hpp	1214	0644	edit dl rm
is_homogeneous.hpp	2839	0644	edit dl rm
is_similar.hpp	910	0644	edit dl rm
pixel_bit_size.hpp	1756	0644	edit dl rm

Edit: /usr/include/boost/gil/extension/toolbox/metafunctions/channel_type.hpp (3419B)

#include <boost/gil/extension/toolbox/dynamic_images.hpp>
#include <boost/gil/extension/toolbox/metafunctions/get_num_bits.hpp>
#include <boost/gil/extension/toolbox/metafunctions/is_homogeneous.hpp>

#include <boost/gil/bit_aligned_pixel_reference.hpp>
#include <boost/gil/channel.hpp>
#include <boost/gil/detail/mp11.hpp>

#include <boost/utility/enable_if.hpp> // boost::lazy_enable_if

namespace boost{ namespace gil {

/// channel_type metafunction
/// \brief Generates the channel type for

template <typename B, typename C, typename L, bool M>
struct gen_chan_ref
{
    using type = packed_dynamic_channel_reference
        <
            B,
            mp11::mp_at_c<C, 0>::value,
            M
        >;
};

//! This implementation works for bit_algined_pixel_reference
//! with a homogeneous channel layout.
//! The result type will be a packed_dynamic_channel_reference, since the
//! offset info will be missing.

// bit_aligned_pixel_reference
template <typename B, typename C, typename L, bool M>
struct channel_type< bit_aligned_pixel_reference<B,C,L,M> >
    : lazy_enable_if< is_homogeneous< bit_aligned_pixel_reference< B, C, L, M > >
                    , gen_chan_ref< B, C, L, M >
                    > {};

template <typename B, typename C, typename L, bool M>
struct channel_type<const bit_aligned_pixel_reference<B,C,L,M> >
    : lazy_enable_if< is_homogeneous< bit_aligned_pixel_reference< B, C, L, M > >
                    , gen_chan_ref< B, C, L, M >
                    > {};

template <typename B, typename C, typename L>
struct gen_chan_ref_p
{
    using type = packed_dynamic_channel_reference
        <
            B,
            get_num_bits<mp11::mp_at_c<C, 0>>::value,
            true
        >;
};

// packed_pixel
template < typename BitField
         , typename ChannelRefs
         , typename Layout
         >
struct channel_type< packed_pixel< BitField
                                 , ChannelRefs
                                 , Layout
                                 >
                   > : lazy_enable_if< is_homogeneous< packed_pixel< BitField
                                                                   , ChannelRefs
                                                                   , Layout
                                                                   >
                                                     >
                                     , gen_chan_ref_p< BitField
                                                     , ChannelRefs
                                                     , Layout
                                                     >
                                     > {};

template <typename B, typename C, typename L>
struct channel_type< const packed_pixel< B, C, L > >
    : lazy_enable_if< is_homogeneous<packed_pixel< B, C, L > >
                    , gen_chan_ref_p< B, C, L >
                    >
{};

template<>
struct channel_type< any_image_pixel_t >
{
    using type = any_image_channel_t;
};

} // namespace gil
} // namespace boost

#endif

// // 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_CHANNEL_TYPE_HPP #define BOOST_GIL_EXTENSION_TOOLBOX_METAFUNCTIONS_CHANNEL_TYPE_HPP #include #include #include #include #include #include #include // boost::lazy_enable_if namespace boost{ namespace gil { /// channel_type metafunction /// \brief Generates the channel type for template struct gen_chan_ref { using type = packed_dynamic_channel_reference < B, mp11::mp_at_c::value, M >; }; //! This implementation works for bit_algined_pixel_reference //! with a homogeneous channel layout. //! The result type will be a packed_dynamic_channel_reference, since the //! offset info will be missing. // bit_aligned_pixel_reference template struct channel_type< bit_aligned_pixel_reference > : lazy_enable_if< is_homogeneous< bit_aligned_pixel_reference< B, C, L, M > > , gen_chan_ref< B, C, L, M > > {}; template struct channel_type > : lazy_enable_if< is_homogeneous< bit_aligned_pixel_reference< B, C, L, M > > , gen_chan_ref< B, C, L, M > > {}; template struct gen_chan_ref_p { using type = packed_dynamic_channel_reference < B, get_num_bits>::value, true >; }; // packed_pixel template < typename BitField , typename ChannelRefs , typename Layout > struct channel_type< packed_pixel< BitField , ChannelRefs , Layout > > : lazy_enable_if< is_homogeneous< packed_pixel< BitField , ChannelRefs , Layout > > , gen_chan_ref_p< BitField , ChannelRefs , Layout > > {}; template struct channel_type< const packed_pixel< B, C, L > > : lazy_enable_if< is_homogeneous > , gen_chan_ref_p< B, C, L > > {}; template<> struct channel_type< any_image_pixel_t > { using type = any_image_channel_t; }; } // namespace gil } // namespace boost #endif