initial SVG generator support (TODO)

include/mapnik/util/geometry_to_svg.hpp

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+/*****************************************************************************
+ * 
+ * This file is part of Mapnik (c++ mapping toolkit)
+ *
+ * Copyright (C) 2011 Artem Pavlenko
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ *****************************************************************************/
+
+//$Id$
+
+#ifndef MAPNIK_GEOMETRY_TO_SVG_HPP
+#define MAPNIK_GEOMETRY_TO_SVG_HPP
+
+// mapnik
+#include <mapnik/global.hpp>
+#include <mapnik/geometry.hpp>
+#include <mapnik/util/vertex_iterator.hpp>
+#include <mapnik/util/container_adapter.hpp>
+
+// boost
+#include <boost/tuple/tuple.hpp>
+#include <boost/spirit/include/karma.hpp>
+#include <boost/spirit/include/phoenix_core.hpp>
+#include <boost/spirit/include/phoenix_operator.hpp>
+#include <boost/spirit/include/phoenix_fusion.hpp>
+#include <boost/spirit/include/phoenix_function.hpp>
+
+//#define BOOST_SPIRIT_USE_PHOENIX_V3 1
+
+namespace mapnik { namespace util {
+
+namespace karma = boost::spirit::karma;
+namespace phoenix = boost::phoenix;
+
+template <typename OutputIterator>
+bool generate_svg (OutputIterator sink, mapnik::geometry_type const& geom)
+{
+    using boost::spirit::karma::double_;
+    using boost::spirit::karma::uint_;
+    using boost::spirit::karma::generate;
+    return generate (sink,
+                     // begin grammar                  
+                     ((&uint_(mapnik::SEG_MOVETO) << 'M' | 'L')
+                      << " " << double_ << " " << double_) % ' '
+                     // end grammar
+                    , geom);
+}
+
+}}
+
+#endif // MAPNIK_GEOMETRY_TO_SVG_HPP