ceph/src/boost/libs/geometry/doc/src/examples/algorithms/create_svg_overlay.hpp

   1 // Boost.Geometry (aka GGL, Generic Geometry Library)
   2
   3 // Copyright (c) 2011-2012 Barend Gehrels, Amsterdam, the Netherlands.
   4
   5 // Use, modification and distribution is subject to the Boost Software License,
   6 // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt)
   8
   9 // Code to create SVG for examples
  10
  11 #ifndef CREATE_SVG_OVERLAY_HPP
  12 #define CREATE_SVG_OVERLAY_HPP
  13
  14 #include <fstream>
  15
  16 #include <boost/foreach.hpp>
  17 #include <boost/algorithm/string.hpp>
  18
  19 #if defined(HAVE_SVG)
  20 #  include <boost/geometry/io/svg/svg_mapper.hpp>
  21 #endif
  22
  23 template <typename Geometry, typename Range>
  24 void create_svg(std::string const& filename, Geometry const& a, Geometry const& b, Range const& range)
  25 {
  26 #if defined(HAVE_SVG)
  27     std::cout  << std::endl << "[$img/algorithms/" << boost::replace_all_copy(filename, ".svg", ".png") << "]" << std::endl << std::endl;
  28
  29     typedef typename boost::geometry::point_type<Geometry>::type point_type;
  30     std::ofstream svg(filename.c_str());
  31
  32     boost::geometry::svg_mapper<point_type> mapper(svg, 400, 400);
  33     mapper.add(a);
  34     mapper.add(b);
  35
  36     mapper.map(a, "fill-opacity:0.5;fill:rgb(153,204,0);stroke:rgb(153,204,0);stroke-width:2");
  37     mapper.map(b, "fill-opacity:0.3;fill:rgb(51,51,153);stroke:rgb(51,51,153);stroke-width:2");
  38     int i = 0;
  39     BOOST_FOREACH(typename boost::range_value<Range>::type const& g, range)
  40     {
  41         mapper.map(g, "opacity:0.8;fill:none;stroke:rgb(255,128,0);stroke-width:4;stroke-dasharray:1,7;stroke-linecap:round");
  42         std::ostringstream out;
  43         out << i++;
  44         mapper.text(boost::geometry::return_centroid<point_type>(g), out.str(),
  45                     "fill:rgb(0,0,0);font-family:Arial;font-size:10px");
  46     }
  47 #else
  48     boost::ignore_unused_variable_warning(filename);
  49     boost::ignore_unused_variable_warning(a);
  50     boost::ignore_unused_variable_warning(b);
  51     boost::ignore_unused_variable_warning(range);
  52 #endif
  53 }
  54
  55 // NOTE: convert manually from svg to png using Inkscape ctrl-shift-E
  56 // and copy png to html/img/algorithms/
  57
  58
  59 #endif // CREATE_SVG_OVERLAY_HPP
  60