comparison DEPENDENCIES/generic/include/boost/gil/extension/io/dynamic_io.hpp @ 16:2665513ce2d3

Add boost headers

+/*
+    Copyright 2005-2007 Adobe Systems Incorporated
+   
+    Use, modification and distribution are subject to 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).
+
+    See http://opensource.adobe.com/gil for most recent version including documentation.
+*/
+/*************************************************************************************************/
+
+#ifndef GIL_DYNAMIC_IO_H
+#define GIL_DYNAMIC_IO_H
+
+/// \file
+/// \brief  Generic io functions for dealing with dynamic images
+//
+/// \author Hailin Jin and Lubomir Bourdev \n
+///         Adobe Systems Incorporated
+/// \date   2005-2007 \n Last updated May 30, 2006
+
+#include <boost/mpl/at.hpp>
+#include <boost/mpl/size.hpp>
+#include "../../gil_config.hpp"
+#include "io_error.hpp"
+#include "../dynamic_image/any_image.hpp"
+
+namespace boost { namespace gil {
+
+namespace detail {
+
+template <long N>
+struct construct_matched_t {
+    template <typename Images,typename Pred>
+    static bool apply(any_image<Images>& im,Pred pred) {
+        if (pred.template apply<typename mpl::at_c<Images,N-1>::type>()) {
+            typename mpl::at_c<Images,N-1>::type x;
+            im.move_in(x);
+            return true;
+        } else return construct_matched_t<N-1>::apply(im,pred);
+    }
+};
+template <>
+struct construct_matched_t<0> {
+    template <typename Images,typename Pred>
+    static bool apply(any_image<Images>&,Pred) {return false;}
+};
+
+// A function object that can be passed to apply_operation.
+// Given a predicate IsSupported taking a view type and returning an MPL boolean,
+// calls the apply method of OpClass with the view if the given view IsSupported, or throws an exception otherwise
+template <typename IsSupported, typename OpClass>
+class dynamic_io_fnobj {
+    OpClass* _op;
+
+    template <typename View>
+    void apply(const View& view,mpl::true_ ) {_op->apply(view);}
+    template <typename View>
+    void apply(const View& view,mpl::false_) {io_error("dynamic_io: unsupported view type for the given file format");}
+public:
+    dynamic_io_fnobj(OpClass* op) : _op(op) {}
+
+    typedef void result_type;
+
+    template <typename View>
+    void operator()(const View& view) {apply(view,typename IsSupported::template apply<View>::type());}
+};
+
+} // namespace detail
+
+/// \brief Within the any_image, constructs an image with the given dimensions
+///        and a type that satisfies the given predicate
+template <typename Images,typename Pred>
+inline bool construct_matched(any_image<Images>& im,Pred pred) {
+    return detail::construct_matched_t<mpl::size<Images>::value>::apply(im,pred);
+}
+
+} }  // namespace boost::gil
+
+#endif