Added thirdparty: boost library

2026-08-18 05:08:11 +00:00 · 2024-01-06 19:55:56 +02:00
parent bf49f439e1
commit bccd1e7051
15683 changed files with 3239840 additions and 0 deletions
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+//
+// 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