/usr/include/mapnik/svg/svg_path_adapter.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) 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
*
*****************************************************************************/
#ifndef MAPNIK_SVG_PATH_ADAPTER_HPP
#define MAPNIK_SVG_PATH_ADAPTER_HPP
// mapnik
#include <mapnik/noncopyable.hpp>
// agg
#include "agg_math.h"
#include "agg_array.h"
#include "agg_bezier_arc.h"
// stl
#include <cmath>
#include <vector>
namespace mapnik {
namespace svg {
using namespace agg;
template<class VertexContainer> class path_adapter : mapnik::noncopyable
{
public:
typedef VertexContainer container_type;
typedef path_adapter<VertexContainer> self_type;
//--------------------------------------------------------------------
path_adapter(VertexContainer & vertices) : vertices_(vertices), iterator_(0) {}
//void remove_all() { vertices_.remove_all(); iterator_ = 0; }
//void free_all() { vertices_.free_all(); iterator_ = 0; }
// Make path functions
//--------------------------------------------------------------------
unsigned start_new_path();
void move_to(double x, double y);
void move_rel(double dx, double dy);
void line_to(double x, double y);
void line_rel(double dx, double dy);
void hline_to(double x);
void hline_rel(double dx);
void vline_to(double y);
void vline_rel(double dy);
void arc_to(double rx, double ry,
double angle,
bool large_arc_flag,
bool sweep_flag,
double x, double y);
void arc_rel(double rx, double ry,
double angle,
bool large_arc_flag,
bool sweep_flag,
double dx, double dy);
void curve3(double x_ctrl, double y_ctrl,
double x_to, double y_to);
void curve3_rel(double dx_ctrl, double dy_ctrl,
double dx_to, double dy_to);
void curve3(double x_to, double y_to);
void curve3_rel(double dx_to, double dy_to);
void curve4(double x_ctrl1, double y_ctrl1,
double x_ctrl2, double y_ctrl2,
double x_to, double y_to);
void curve4_rel(double dx_ctrl1, double dy_ctrl1,
double dx_ctrl2, double dy_ctrl2,
double dx_to, double dy_to);
void curve4(double x_ctrl2, double y_ctrl2,
double x_to, double y_to);
void curve4_rel(double x_ctrl2, double y_ctrl2,
double x_to, double y_to);
void end_poly(unsigned flags = path_flags_close);
void close_polygon(unsigned flags = path_flags_none);
// Accessors
//--------------------------------------------------------------------
const container_type& vertices() const { return vertices_; }
container_type& vertices() { return vertices_; }
unsigned total_vertices() const;
void rel_to_abs(double* x, double* y) const;
unsigned last_vertex(double* x, double* y) const;
unsigned prev_vertex(double* x, double* y) const;
double last_x() const;
double last_y() const;
unsigned vertex(unsigned idx, double* x, double* y) const;
unsigned command(unsigned idx) const;
void modify_vertex(unsigned idx, double x, double y);
void modify_vertex(unsigned idx, double x, double y, unsigned cmd);
void modify_command(unsigned idx, unsigned cmd);
// VertexSource interface
//--------------------------------------------------------------------
void rewind(unsigned path_id);
unsigned vertex(double* x, double* y);
// Arrange the orientation of a polygon, all polygons in a path,
// or in all paths. After calling arrange_orientations() or
// arrange_orientations_all_paths(), all the polygons will have
// the same orientation, i.e. path_flags_cw or path_flags_ccw
//--------------------------------------------------------------------
unsigned arrange_polygon_orientation(unsigned start, path_flags_e orientation);
unsigned arrange_orientations(unsigned path_id, path_flags_e orientation);
void arrange_orientations_all_paths(path_flags_e orientation);
void invert_polygon(unsigned start);
// Flip all vertices horizontally or vertically,
// between x1 and x2, or between y1 and y2 respectively
//--------------------------------------------------------------------
void flip_x(double x1, double x2);
void flip_y(double y1, double y2);
// Concatenate path. The path is added as is.
//--------------------------------------------------------------------
template<class VertexSource>
void concat_path(VertexSource& vs, unsigned path_id = 0)
{
double x(0), y(0);
unsigned cmd;
vs.rewind(path_id);
while(!is_stop(cmd = vs.vertex(&x, &y)))
{
vertices_.add_vertex(x, y, cmd);
}
}
//--------------------------------------------------------------------
// Join path. The path is joined with the existing one, that is,
// it behaves as if the pen of a plotter was always down (drawing)
template<class VertexSource>
void join_path(VertexSource& vs, unsigned path_id = 0)
{
double x, y;
unsigned cmd;
vs.rewind(path_id);
cmd = vs.vertex(&x, &y);
if(!is_stop(cmd))
{
if(is_vertex(cmd))
{
double x0, y0;
unsigned cmd0 = last_vertex(&x0, &y0);
if(is_vertex(cmd0))
{
if(calc_distance(x, y, x0, y0) > vertex_dist_epsilon)
{
if(is_move_to(cmd)) cmd = path_cmd_line_to;
vertices_.add_vertex(x, y, cmd);
}
}
else
{
if(is_stop(cmd0))
{
cmd = path_cmd_move_to;
}
else
{
if(is_move_to(cmd)) cmd = path_cmd_line_to;
}
vertices_.add_vertex(x, y, cmd);
}
}
while(!is_stop(cmd = vs.vertex(&x, &y)))
{
vertices_.add_vertex(x, y, is_move_to(cmd) ?
unsigned(path_cmd_line_to) :
cmd);
}
}
}
//--------------------------------------------------------------------
void translate(double dx, double dy, unsigned path_id=0);
void translate_all_paths(double dx, double dy);
//--------------------------------------------------------------------
template<class Trans>
void transform(const Trans& trans, unsigned path_id=0)
{
unsigned num_ver = vertices_.total_vertices();
for(; path_id < num_ver; path_id++)
{
double x, y;
unsigned cmd = vertices_.vertex(path_id, &x, &y);
if(is_stop(cmd)) break;
if(is_vertex(cmd))
{
trans.transform(&x, &y);
vertices_.modify_vertex(path_id, x, y);
}
}
}
//--------------------------------------------------------------------
template<class Trans>
void transform_all_paths(const Trans& trans)
{
unsigned idx;
unsigned num_ver = vertices_.total_vertices();
for(idx = 0; idx < num_ver; idx++)
{
double x, y;
if(is_vertex(vertices_.vertex(idx, &x, &y)))
{
trans.transform(&x, &y);
vertices_.modify_vertex(idx, x, y);
}
}
}
private:
unsigned perceive_polygon_orientation(unsigned start, unsigned end);
void invert_polygon(unsigned start, unsigned end);
VertexContainer & vertices_;
unsigned iterator_;
double start_x_;
double start_y_;
};
//------------------------------------------------------------------------
template<class VC>
unsigned path_adapter<VC>::start_new_path()
{
if(!is_stop(vertices_.last_command()))
{
vertices_.add_vertex(0.0, 0.0, path_cmd_stop);
}
return vertices_.total_vertices();
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::rel_to_abs(double* x, double* y) const
{
if(vertices_.total_vertices())
{
double x2;
double y2;
if(is_vertex(vertices_.last_vertex(&x2, &y2))
|| !is_stop(vertices_.last_command()))
{
*x += x2;
*y += y2;
}
}
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::move_to(double x, double y)
{
start_x_ = x;
start_y_ = y;
vertices_.add_vertex(x, y, path_cmd_move_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::move_rel(double dx, double dy)
{
rel_to_abs(&dx, &dy);
vertices_.add_vertex(dx, dy, path_cmd_move_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::line_to(double x, double y)
{
vertices_.add_vertex(x, y, path_cmd_line_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::line_rel(double dx, double dy)
{
rel_to_abs(&dx, &dy);
vertices_.add_vertex(dx, dy, path_cmd_line_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::hline_to(double x)
{
vertices_.add_vertex(x, last_y(), path_cmd_line_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::hline_rel(double dx)
{
double dy = 0;
rel_to_abs(&dx, &dy);
vertices_.add_vertex(dx, dy, path_cmd_line_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::vline_to(double y)
{
vertices_.add_vertex(last_x(), y, path_cmd_line_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::vline_rel(double dy)
{
double dx = 0;
rel_to_abs(&dx, &dy);
vertices_.add_vertex(dx, dy, path_cmd_line_to);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::arc_to(double rx, double ry,
double angle,
bool large_arc_flag,
bool sweep_flag,
double x, double y)
{
if(vertices_.total_vertices() && is_vertex(vertices_.last_command()))
{
const double epsilon = 1e-30;
double x0 = 0.0;
double y0 = 0.0;
vertices_.last_vertex(&x0, &y0);
rx = std::fabs(rx);
ry = std::fabs(ry);
// Ensure radii are valid
//-------------------------
if(rx < epsilon || ry < epsilon)
{
line_to(x, y);
return;
}
if(calc_distance(x0, y0, x, y) < epsilon)
{
// If the endpoints (x, y) and (x0, y0) are identical, then this
// is equivalent to omitting the elliptical arc segment entirely.
return;
}
bezier_arc_svg a(x0, y0, rx, ry, angle, large_arc_flag, sweep_flag, x, y);
if(a.radii_ok())
{
join_path(a);
}
else
{
line_to(x, y);
}
}
else
{
move_to(x, y);
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::arc_rel(double rx, double ry,
double angle,
bool large_arc_flag,
bool sweep_flag,
double dx, double dy)
{
rel_to_abs(&dx, &dy);
arc_to(rx, ry, angle, large_arc_flag, sweep_flag, dx, dy);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve3(double x_ctrl, double y_ctrl,
double x_to, double y_to)
{
vertices_.add_vertex(x_ctrl, y_ctrl, path_cmd_curve3);
vertices_.add_vertex(x_to, y_to, path_cmd_curve3);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve3_rel(double dx_ctrl, double dy_ctrl,
double dx_to, double dy_to)
{
rel_to_abs(&dx_ctrl, &dy_ctrl);
rel_to_abs(&dx_to, &dy_to);
vertices_.add_vertex(dx_ctrl, dy_ctrl, path_cmd_curve3);
vertices_.add_vertex(dx_to, dy_to, path_cmd_curve3);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve3(double x_to, double y_to)
{
double x0;
double y0;
if(is_vertex(vertices_.last_vertex(&x0, &y0)))
{
double x_ctrl;
double y_ctrl;
unsigned cmd = vertices_.prev_vertex(&x_ctrl, &y_ctrl);
if(is_curve(cmd))
{
x_ctrl = x0 + x0 - x_ctrl;
y_ctrl = y0 + y0 - y_ctrl;
}
else
{
x_ctrl = x0;
y_ctrl = y0;
}
curve3(x_ctrl, y_ctrl, x_to, y_to);
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve3_rel(double dx_to, double dy_to)
{
rel_to_abs(&dx_to, &dy_to);
curve3(dx_to, dy_to);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve4(double x_ctrl1, double y_ctrl1,
double x_ctrl2, double y_ctrl2,
double x_to, double y_to)
{
vertices_.add_vertex(x_ctrl1, y_ctrl1, path_cmd_curve4);
vertices_.add_vertex(x_ctrl2, y_ctrl2, path_cmd_curve4);
vertices_.add_vertex(x_to, y_to, path_cmd_curve4);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve4_rel(double dx_ctrl1, double dy_ctrl1,
double dx_ctrl2, double dy_ctrl2,
double dx_to, double dy_to)
{
rel_to_abs(&dx_ctrl1, &dy_ctrl1);
rel_to_abs(&dx_ctrl2, &dy_ctrl2);
rel_to_abs(&dx_to, &dy_to);
vertices_.add_vertex(dx_ctrl1, dy_ctrl1, path_cmd_curve4);
vertices_.add_vertex(dx_ctrl2, dy_ctrl2, path_cmd_curve4);
vertices_.add_vertex(dx_to, dy_to, path_cmd_curve4);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve4(double x_ctrl2, double y_ctrl2,
double x_to, double y_to)
{
double x0;
double y0;
if(is_vertex(last_vertex(&x0, &y0)))
{
double x_ctrl1;
double y_ctrl1;
unsigned cmd = prev_vertex(&x_ctrl1, &y_ctrl1);
if(is_curve(cmd))
{
x_ctrl1 = x0 + x0 - x_ctrl1;
y_ctrl1 = y0 + y0 - y_ctrl1;
}
else
{
x_ctrl1 = x0;
y_ctrl1 = y0;
}
curve4(x_ctrl1, y_ctrl1, x_ctrl2, y_ctrl2, x_to, y_to);
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::curve4_rel(double dx_ctrl2, double dy_ctrl2,
double dx_to, double dy_to)
{
rel_to_abs(&dx_ctrl2, &dy_ctrl2);
rel_to_abs(&dx_to, &dy_to);
curve4(dx_ctrl2, dy_ctrl2, dx_to, dy_to);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::end_poly(unsigned flags)
{
if(is_vertex(vertices_.last_command()))
{
vertices_.add_vertex(start_x_, start_y_, path_cmd_end_poly | flags);
}
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::close_polygon(unsigned flags)
{
end_poly(path_flags_close | flags);
}
//------------------------------------------------------------------------
template<class VC>
inline unsigned path_adapter<VC>::total_vertices() const
{
return vertices_.total_vertices();
}
//------------------------------------------------------------------------
template<class VC>
inline unsigned path_adapter<VC>::last_vertex(double* x, double* y) const
{
return vertices_.last_vertex(x, y);
}
//------------------------------------------------------------------------
template<class VC>
inline unsigned path_adapter<VC>::prev_vertex(double* x, double* y) const
{
return vertices_.prev_vertex(x, y);
}
//------------------------------------------------------------------------
template<class VC>
inline double path_adapter<VC>::last_x() const
{
return vertices_.last_x();
}
//------------------------------------------------------------------------
template<class VC>
inline double path_adapter<VC>::last_y() const
{
return vertices_.last_y();
}
//------------------------------------------------------------------------
template<class VC>
inline unsigned path_adapter<VC>::vertex(unsigned idx, double* x, double* y) const
{
return vertices_.vertex(idx, x, y);
}
//------------------------------------------------------------------------
template<class VC>
inline unsigned path_adapter<VC>::command(unsigned idx) const
{
return vertices_.command(idx);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::modify_vertex(unsigned idx, double x, double y)
{
vertices_.modify_vertex(idx, x, y);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::modify_vertex(unsigned idx, double x, double y, unsigned cmd)
{
vertices_.modify_vertex(idx, x, y, cmd);
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::modify_command(unsigned idx, unsigned cmd)
{
vertices_.modify_command(idx, cmd);
}
//------------------------------------------------------------------------
template<class VC>
inline void path_adapter<VC>::rewind(unsigned path_id)
{
iterator_ = path_id;
}
//------------------------------------------------------------------------
template<class VC>
inline unsigned path_adapter<VC>::vertex(double* x, double* y)
{
if(iterator_ >= vertices_.total_vertices()) return path_cmd_stop;
return vertices_.vertex(iterator_++, x, y);
}
//------------------------------------------------------------------------
template<class VC>
unsigned path_adapter<VC>::perceive_polygon_orientation(unsigned start,
unsigned end)
{
// Calculate signed area (double area to be exact)
//---------------------
unsigned np = end - start;
double area = 0.0;
unsigned i;
for(i = 0; i < np; i++)
{
double x1, y1, x2, y2;
vertices_.vertex(start + i, &x1, &y1);
vertices_.vertex(start + (i + 1) % np, &x2, &y2);
area += x1 * y2 - y1 * x2;
}
return (area < 0.0) ? path_flags_cw : path_flags_ccw;
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::invert_polygon(unsigned start, unsigned end)
{
unsigned i;
unsigned tmp_cmd = vertices_.command(start);
--end; // Make "end" inclusive
// Shift all commands to one position
for(i = start; i < end; i++)
{
vertices_.modify_command(i, vertices_.command(i + 1));
}
// Assign starting command to the ending command
vertices_.modify_command(end, tmp_cmd);
// Reverse the polygon
while(end > start)
{
vertices_.swap_vertices(start++, end--);
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::invert_polygon(unsigned start)
{
// Skip all non-vertices at the beginning
while(start < vertices_.total_vertices() &&
!is_vertex(vertices_.command(start))) ++start;
// Skip all insignificant move_to
while(start+1 < vertices_.total_vertices() &&
is_move_to(vertices_.command(start)) &&
is_move_to(vertices_.command(start+1))) ++start;
// Find the last vertex
unsigned end = start + 1;
while(end < vertices_.total_vertices() &&
!is_next_poly(vertices_.command(end))) ++end;
invert_polygon(start, end);
}
//------------------------------------------------------------------------
template<class VC>
unsigned path_adapter<VC>::arrange_polygon_orientation(unsigned start,
path_flags_e orientation)
{
if(orientation == path_flags_none) return start;
// Skip all non-vertices at the beginning
while(start < vertices_.total_vertices() &&
!is_vertex(vertices_.command(start))) ++start;
// Skip all insignificant move_to
while(start+1 < vertices_.total_vertices() &&
is_move_to(vertices_.command(start)) &&
is_move_to(vertices_.command(start+1))) ++start;
// Find the last vertex
unsigned end = start + 1;
while(end < vertices_.total_vertices() &&
!is_next_poly(vertices_.command(end))) ++end;
if(end - start > 2)
{
if(perceive_polygon_orientation(start, end) != unsigned(orientation))
{
// Invert polygon, set orientation flag, and skip all end_poly
invert_polygon(start, end);
unsigned cmd;
while(end < vertices_.total_vertices() &&
is_end_poly(cmd = vertices_.command(end)))
{
vertices_.modify_command(end++, set_orientation(cmd, orientation));
}
}
}
return end;
}
//------------------------------------------------------------------------
template<class VC>
unsigned path_adapter<VC>::arrange_orientations(unsigned start,
path_flags_e orientation)
{
if(orientation != path_flags_none)
{
while(start < vertices_.total_vertices())
{
start = arrange_polygon_orientation(start, orientation);
if(is_stop(vertices_.command(start)))
{
++start;
break;
}
}
}
return start;
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::arrange_orientations_all_paths(path_flags_e orientation)
{
if(orientation != path_flags_none)
{
unsigned start = 0;
while(start < vertices_.total_vertices())
{
start = arrange_orientations(start, orientation);
}
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::flip_x(double x1, double x2)
{
unsigned i;
double x, y;
for(i = 0; i < vertices_.total_vertices(); i++)
{
unsigned cmd = vertices_.vertex(i, &x, &y);
if(is_vertex(cmd))
{
vertices_.modify_vertex(i, x2 - x + x1, y);
}
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::flip_y(double y1, double y2)
{
unsigned i;
double x, y;
for(i = 0; i < vertices_.total_vertices(); i++)
{
unsigned cmd = vertices_.vertex(i, &x, &y);
if(is_vertex(cmd))
{
vertices_.modify_vertex(i, x, y2 - y + y1);
}
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::translate(double dx, double dy, unsigned path_id)
{
unsigned num_ver = vertices_.total_vertices();
for(; path_id < num_ver; path_id++)
{
double x, y;
unsigned cmd = vertices_.vertex(path_id, &x, &y);
if(is_stop(cmd)) break;
if(is_vertex(cmd))
{
x += dx;
y += dy;
vertices_.modify_vertex(path_id, x, y);
}
}
}
//------------------------------------------------------------------------
template<class VC>
void path_adapter<VC>::translate_all_paths(double dx, double dy)
{
unsigned idx;
unsigned num_ver = vertices_.total_vertices();
for(idx = 0; idx < num_ver; idx++)
{
double x, y;
if(is_vertex(vertices_.vertex(idx, &x, &y)))
{
x += dx;
y += dy;
vertices_.modify_vertex(idx, x, y);
}
}
}
template<class Container> class vertex_stl_adapter : mapnik::noncopyable
{
public:
typedef typename Container::value_type vertex_type;
typedef typename vertex_type::value_type value_type;
explicit vertex_stl_adapter(Container & vertices)
: vertices_(vertices) {}
void add_vertex(double x, double y, unsigned cmd)
{
vertices_.push_back(vertex_type(value_type(x),
value_type(y),
int8u(cmd)));
}
void modify_vertex(unsigned idx, double x, double y)
{
vertex_type& v = vertices_[idx];
v.x = value_type(x);
v.y = value_type(y);
}
void modify_vertex(unsigned idx, double x, double y, unsigned cmd)
{
vertex_type& v = vertices_[idx];
v.x = value_type(x);
v.y = value_type(y);
v.cmd = int8u(cmd);
}
void modify_command(unsigned idx, unsigned cmd)
{
vertices_[idx].cmd = int8u(cmd);
}
void swap_vertices(unsigned v1, unsigned v2)
{
vertex_type t = vertices_[v1];
vertices_[v1] = vertices_[v2];
vertices_[v2] = t;
}
unsigned last_command() const
{
return vertices_.size() ?
vertices_[vertices_.size() - 1].cmd :
(unsigned)path_cmd_stop;
}
unsigned last_vertex(double* x, double* y) const
{
if(vertices_.size() == 0)
{
*x = *y = 0.0;
return path_cmd_stop;
}
return vertex(vertices_.size() - 1, x, y);
}
unsigned prev_vertex(double* x, double* y) const
{
if(vertices_.size() < 2)
{
*x = *y = 0.0;
return path_cmd_stop;
}
return vertex(vertices_.size() - 2, x, y);
}
double last_x() const
{
return vertices_.size() ? vertices_[vertices_.size() - 1].x : 0.0;
}
double last_y() const
{
return vertices_.size() ? vertices_[vertices_.size() - 1].y : 0.0;
}
unsigned total_vertices() const
{
return vertices_.size();
}
unsigned vertex(unsigned idx, double* x, double* y) const
{
const vertex_type& v = vertices_[idx];
*x = v.x;
*y = v.y;
return v.cmd;
}
unsigned command(unsigned idx) const
{
return vertices_[idx].cmd;
}
private:
Container & vertices_;
};
typedef std::vector<vertex_d> svg_path_storage;
typedef path_adapter<vertex_stl_adapter<svg_path_storage> > svg_path_adapter;
}}
#endif // MAPNIK_SVG_PATH_ADAPTER
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