add boost on mac

macx64/include/boost/gil/io/conversion_policies.hpp

@@ -0,0 +1,105 @@
+//
+// Copyright 2007-2008 Christian Henning, Andreas Pokorny
+//
+// 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_IO_CONVERSION_POLICIES_HPP
+#define BOOST_GIL_IO_CONVERSION_POLICIES_HPP
+
+#include <boost/gil/image_view_factory.hpp>
+#include <boost/gil/io/error.hpp>
+
+#include <algorithm>
+#include <iterator>
+#include <type_traits>
+
+namespace boost{namespace gil{ namespace detail {
+
+struct read_and_no_convert
+{
+public:
+    using color_converter_type = void *;
+
+    template <typename InIterator, typename OutIterator>
+    void read(
+        InIterator const& /*begin*/, InIterator const& /*end*/ , OutIterator /*out*/,
+        typename std::enable_if
+        <
+            mpl::not_
+            <
+                pixels_are_compatible
+                <
+                    typename std::iterator_traits<InIterator>::value_type,
+                    typename std::iterator_traits<OutIterator>::value_type
+                >
+            >::value
+        >::type* /*dummy*/ = nullptr)
+    {
+        io_error("Data cannot be copied because the pixels are incompatible.");
+    }
+
+    template <typename InIterator, typename OutIterator>
+    void read(InIterator const& begin, InIterator const& end, OutIterator out,
+        typename std::enable_if
+        <
+            pixels_are_compatible
+            <
+                typename std::iterator_traits<InIterator>::value_type,
+                typename std::iterator_traits<OutIterator>::value_type
+            >::value
+        >::type* /*dummy*/ = nullptr)
+    {
+        std::copy(begin, end, out);
+    }
+};
+
+template<typename CC>
+struct read_and_convert
+{
+public:
+    using color_converter_type = default_color_converter;
+    CC _cc;
+
+    read_and_convert()
+    {}
+
+    read_and_convert( const color_converter_type& cc )
+    : _cc( cc )
+    {}
+
+    template< typename InIterator
+            , typename OutIterator
+            >
+    void read( const InIterator& begin
+             , const InIterator& end
+             , OutIterator       out
+             )
+    {
+        using deref_t = color_convert_deref_fn<typename std::iterator_traits<InIterator>::reference
+                                      , typename std::iterator_traits<OutIterator>::value_type //reference?
+                                      , CC
+                                      >;
+
+        std::transform( begin
+                      , end
+                      , out
+                      , deref_t( _cc )
+                      );
+    }
+};
+
+/// is_read_only metafunction
+/// \brief Determines if reader type is read only ( no conversion ).
+template< typename Conversion_Policy >
+struct is_read_only : mpl::false_ {};
+
+template<>
+struct is_read_only< detail::read_and_no_convert > : mpl::true_ {};
+
+} // namespace detail
+} // namespace gil
+} // namespace boost
+
+#endif