/usr/include/mapnik/vertex_converters.hpp is in libmapnik-dev 2.2.0+ds1-6build2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2012 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
*
*****************************************************************************/
#ifndef MAPNIK_VERTEX_CONVERTERS_HPP
#define MAPNIK_VERTEX_CONVERTERS_HPP
// boost
#include <boost/type_traits/is_same.hpp>
// mpl
#include <boost/mpl/vector.hpp>
#include <boost/mpl/push_back.hpp>
#include <boost/mpl/set.hpp>
#include <boost/mpl/begin_end.hpp>
#include <boost/mpl/distance.hpp>
#include <boost/mpl/deref.hpp>
#include <boost/mpl/find.hpp>
#include <boost/mpl/size.hpp>
#include <boost/mpl/at.hpp>
#include <boost/mpl/int.hpp>
// fusion
#include <boost/fusion/include/mpl.hpp>
#include <boost/fusion/container/vector.hpp>
#include <boost/fusion/include/at_c.hpp>
#include <boost/fusion/include/make_vector.hpp>
#include <boost/foreach.hpp>
#include <boost/array.hpp>
// mapnik
#include <mapnik/agg_helpers.hpp>
#include <mapnik/offset_converter.hpp>
#include <mapnik/simplify_converter.hpp>
#include <mapnik/noncopyable.hpp>
// agg
#include "agg_conv_clip_polygon.h"
#include "agg_conv_clip_polyline.h"
#include "agg_conv_close_polygon.h"
#include "agg_conv_smooth_poly1.h"
#include "agg_conv_stroke.h"
#include "agg_conv_dash.h"
#include "agg_conv_transform.h"
#include "agg_conv_clipper.h"
#include "agg_path_storage.h"
namespace mapnik {
struct transform_tag {};
struct clip_line_tag {};
struct clip_poly_tag {};
struct clipper_tag {};
struct close_poly_tag {};
struct smooth_tag {};
struct simplify_tag {};
struct stroke_tag {};
struct dash_tag {};
struct affine_transform_tag {};
struct offset_transform_tag {};
namespace detail {
template <typename T0, typename T1>
struct converter_traits
{
typedef T0 geometry_type;
typedef geometry_type conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
throw "BOOM!";
}
};
template <typename T>
struct converter_traits<T,mapnik::smooth_tag>
{
typedef T geometry_type;
typedef typename agg::conv_smooth_poly1_curve<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
geom.smooth_value(boost::fusion::at_c<2>(args).smooth());
}
};
template <typename T>
struct converter_traits<T,mapnik::simplify_tag>
{
typedef T geometry_type;
typedef simplify_converter<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
geom.set_simplify_algorithm(boost::fusion::at_c<2>(args).simplify_algorithm());
geom.set_simplify_tolerance(boost::fusion::at_c<2>(args).simplify_tolerance());
}
};
template <typename T>
struct converter_traits<T, mapnik::clip_line_tag>
{
typedef T geometry_type;
typedef typename agg::conv_clip_polyline<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
typename boost::mpl::at<Args,boost::mpl::int_<0> >::type box = boost::fusion::at_c<0>(args);
geom.clip_box(box.minx(),box.miny(),box.maxx(),box.maxy());
}
};
template <typename T>
struct converter_traits<T, mapnik::dash_tag>
{
typedef T geometry_type;
typedef typename agg::conv_dash<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
typename boost::mpl::at<Args,boost::mpl::int_<2> >::type sym = boost::fusion::at_c<2>(args);
double scale_factor = boost::fusion::at_c<6>(args);
stroke const& stroke_ = sym.get_stroke();
dash_array const& d = stroke_.get_dash_array();
dash_array::const_iterator itr = d.begin();
dash_array::const_iterator end = d.end();
for (;itr != end;++itr)
{
geom.add_dash(itr->first * scale_factor,
itr->second * scale_factor);
}
}
};
template <typename T>
struct converter_traits<T, mapnik::stroke_tag>
{
typedef T geometry_type;
typedef typename agg::conv_stroke<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
typename boost::mpl::at<Args,boost::mpl::int_<2> >::type sym = boost::fusion::at_c<2>(args);
stroke const& stroke_ = sym.get_stroke();
set_join_caps(stroke_,geom);
geom.generator().miter_limit(stroke_.get_miterlimit());
double scale_factor = boost::fusion::at_c<6>(args);
geom.generator().width(stroke_.get_width() * scale_factor);
}
};
template <typename T>
struct converter_traits<T,mapnik::clip_poly_tag>
{
typedef T geometry_type;
typedef typename agg::conv_clip_polygon<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
typename boost::mpl::at<Args,boost::mpl::int_<0> >::type box = boost::fusion::at_c<0>(args);
geom.clip_box(box.minx(),box.miny(),box.maxx(),box.maxy());
}
};
template <typename T>
struct converter_traits<T,mapnik::clipper_tag>
{
typedef T geometry_type;
typedef typename agg::conv_clipper<geometry_type,agg::path_storage> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
typename boost::mpl::at<Args,boost::mpl::int_<0> >::type box = boost::fusion::at_c<0>(args);
agg::path_storage * ps = new agg::path_storage(); // FIXME: this will leak memory!
ps->move_to(box.minx(),box.miny());
ps->line_to(box.minx(),box.maxy());
ps->line_to(box.maxx(),box.maxy());
ps->line_to(box.maxx(),box.miny());
ps->close_polygon();
geom.attach2(*ps, agg::clipper_non_zero);
//geom.reverse(true);
}
};
template <typename T>
struct converter_traits<T,mapnik::close_poly_tag>
{
typedef T geometry_type;
typedef typename agg::conv_close_polygon<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
// no-op
}
};
template <typename T>
struct converter_traits<T,mapnik::transform_tag>
{
typedef T geometry_type;
typedef coord_transform<CoordTransform, geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
geom.set_proj_trans(boost::fusion::at_c<4>(args));
geom.set_trans(boost::fusion::at_c<3>(args));
}
};
template <typename T>
struct converter_traits<T,mapnik::affine_transform_tag>
{
typedef T geometry_type;
typedef agg::conv_transform<geometry_type, agg::trans_affine const>
conv_base_type;
struct conv_type : public conv_base_type
{
conv_type(geometry_type& geom)
: conv_base_type(geom, agg::trans_affine::identity) {}
};
template <typename Args>
static void setup(geometry_type & geom, Args & args)
{
geom.transformer(boost::fusion::at_c<5>(args));
}
};
template <typename T>
struct converter_traits<T,mapnik::offset_transform_tag>
{
typedef T geometry_type;
typedef offset_converter<geometry_type> conv_type;
template <typename Args>
static void setup(geometry_type & geom, Args const& args)
{
typename boost::mpl::at<Args,boost::mpl::int_<2> >::type sym = boost::fusion::at_c<2>(args);
double scale_factor = boost::fusion::at_c<6>(args);
geom.set_offset(sym.offset()*scale_factor);
}
};
template <bool>
struct converter_fwd
{
template <typename Base, typename T0,typename T1,typename T2, typename Iter,typename End>
static void forward(Base& base, T0 & geom,T1 const& args)
{
typedef T0 geometry_type;
typedef T2 conv_tag;
typedef typename detail::converter_traits<geometry_type,conv_tag>::conv_type conv_type;
conv_type conv(geom);
detail::converter_traits<conv_type,conv_tag>::setup(conv,args);
base.template dispatch<Iter,End>(conv, typename boost::is_same<Iter,End>::type());
}
};
template <>
struct converter_fwd<true>
{
template <typename Base, typename T0,typename T1,typename T2, typename Iter,typename End>
static void forward(Base& base, T0 & geom,T1 const& args)
{
base.template dispatch<Iter,End>(geom, typename boost::is_same<Iter,End>::type());
}
};
template <typename A, typename C>
struct dispatcher
{
typedef dispatcher this_type;
typedef A args_type;
typedef C conv_types;
dispatcher(args_type const& args)
: args_(args)
{
std::memset(&vec_[0], 0, sizeof(unsigned)*vec_.size());
}
template <typename Iter, typename End, typename Geometry>
void dispatch(Geometry & geom, boost::mpl::true_)
{
boost::fusion::at_c<1>(args_).add_path(geom);
}
template <typename Iter, typename End, typename Geometry>
void dispatch(Geometry & geom, boost::mpl::false_)
{
typedef typename boost::mpl::deref<Iter>::type conv_tag;
typedef typename detail::converter_traits<Geometry,conv_tag>::conv_type conv_type;
typedef typename boost::mpl::next<Iter>::type Next;
std::size_t index = boost::mpl::distance<Iter,End>::value - 1;
if (vec_[index] == 1)
{
converter_fwd<boost::is_same<Geometry,conv_type>::value>::
template forward<this_type,Geometry,args_type,conv_tag,Next,End>(*this,geom,args_);
}
else
{
converter_fwd<boost::mpl::true_::value>::
template forward<this_type,Geometry,args_type,conv_tag,Next,End>(*this,geom,args_);
}
}
template <typename Geometry>
void apply(Geometry & geom)
{
typedef typename boost::mpl::begin<conv_types>::type begin;
typedef typename boost::mpl::end <conv_types>::type end;
dispatch<begin,end,Geometry>(geom, boost::false_type());
}
boost::array<unsigned, boost::mpl::size<conv_types>::value> vec_;
args_type args_;
};
}
template <typename B, typename R, typename S, typename T, typename P, typename A, typename C >
struct vertex_converter : private mapnik::noncopyable
{
typedef C conv_types;
typedef B bbox_type;
typedef R rasterizer_type;
typedef S symbolizer_type;
typedef T trans_type;
typedef P proj_trans_type;
typedef A affine_trans_type;
typedef typename boost::fusion::vector
<
bbox_type const&,
rasterizer_type&,
symbolizer_type const&,
trans_type const&,
proj_trans_type const&,
affine_trans_type const&,
double //scale-factor
> args_type;
vertex_converter(bbox_type const& b, rasterizer_type & ras,
symbolizer_type const& sym, trans_type & tr,
proj_trans_type const& prj_trans,
affine_trans_type const& affine_trans,
double scale_factor)
: disp_(args_type(boost::cref(b), boost::ref(ras),
boost::cref(sym), boost::cref(tr),
boost::cref(prj_trans),
boost::cref(affine_trans),
scale_factor)) {}
template <typename Geometry>
void apply(Geometry & geom)
{
typedef Geometry geometry_type;
disp_.template apply<geometry_type>(geom);
}
template <typename Conv>
void set()
{
typedef typename boost::mpl::find<conv_types,Conv>::type iter;
typedef typename boost::mpl::end<conv_types>::type end;
std::size_t index = boost::mpl::distance<iter,end>::value - 1;
if (index < disp_.vec_.size())
disp_.vec_[index]=1;
}
template <typename Conv>
void unset()
{
typedef typename boost::mpl::find<conv_types,Conv>::type iter;
typedef typename boost::mpl::end<conv_types>::type end;
std::size_t index = boost::mpl::distance<iter,end>::value - 1;
if (index < disp_.vec_.size())
disp_.vec_[index]=0;
}
detail::dispatcher<args_type,conv_types> disp_;
};
}
#endif // MAPNIK_VERTEX_CONVERTERS_HPP
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