//
|
// Copyright 2010 Fabien Castan, Christian Henning
|
//
|
// 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_CHANNEL_VIEW_HPP
|
#define BOOST_GIL_EXTENSION_TOOLBOX_CHANNEL_VIEW_HPP
|
|
#include <boost/gil/image_view_factory.hpp>
|
|
namespace boost {
|
namespace gil {
|
|
template <typename Channel, typename View>
|
struct channel_type_to_index
|
{
|
static constexpr int value = detail::type_to_index
|
<
|
typename color_space_type<View>::type, // color (Boost.MP11-compatible list)
|
Channel // channel type
|
>::value; // index of the channel in the color (Boost.MP11-compatible list)
|
};
|
|
template<typename Channel, typename View>
|
struct channel_view_type : kth_channel_view_type
|
<
|
channel_type_to_index<Channel, View>::value,
|
View
|
>
|
{
|
static constexpr int index = channel_type_to_index
|
<
|
Channel,
|
View
|
>::value;
|
|
using parent_t = kth_channel_view_type<index, View>;
|
using type = typename parent_t::type;
|
|
static type make( const View& src )
|
{
|
return parent_t::make( src );
|
}
|
};
|
|
/// \ingroup ImageViewTransformationsKthChannel
|
template<typename Channel, typename View>
|
auto channel_view(View const& src)
|
-> typename channel_view_type<Channel, View>::type
|
{
|
return channel_view_type<Channel, View>::make(src);
|
}
|
|
}} // namespace boost::gil
|
|
#endif
|
