951 lines
28 KiB
C++
951 lines
28 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_SVG_PATH_ADAPTER_HPP
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#define MAPNIK_SVG_PATH_ADAPTER_HPP
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// mapnik
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#include <boost/utility.hpp>
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// agg
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#include "agg_math.h"
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#include "agg_array.h"
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#include "agg_bezier_arc.h"
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// stl
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#include <cmath>
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#include <vector>
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namespace mapnik {
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namespace svg {
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using namespace agg;
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template<class VertexContainer> class path_adapter : boost::noncopyable
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{
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public:
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typedef VertexContainer container_type;
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typedef path_adapter<VertexContainer> self_type;
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//--------------------------------------------------------------------
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path_adapter(VertexContainer & vertices) : vertices_(vertices), iterator_(0) {}
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//void remove_all() { vertices_.remove_all(); iterator_ = 0; }
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//void free_all() { vertices_.free_all(); iterator_ = 0; }
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// Make path functions
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//--------------------------------------------------------------------
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unsigned start_new_path();
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void move_to(double x, double y);
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void move_rel(double dx, double dy);
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void line_to(double x, double y);
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void line_rel(double dx, double dy);
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void hline_to(double x);
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void hline_rel(double dx);
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void vline_to(double y);
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void vline_rel(double dy);
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void arc_to(double rx, double ry,
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double angle,
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bool large_arc_flag,
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bool sweep_flag,
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double x, double y);
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void arc_rel(double rx, double ry,
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double angle,
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bool large_arc_flag,
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bool sweep_flag,
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double dx, double dy);
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void curve3(double x_ctrl, double y_ctrl,
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double x_to, double y_to);
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void curve3_rel(double dx_ctrl, double dy_ctrl,
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double dx_to, double dy_to);
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void curve3(double x_to, double y_to);
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void curve3_rel(double dx_to, double dy_to);
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void curve4(double x_ctrl1, double y_ctrl1,
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double x_ctrl2, double y_ctrl2,
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double x_to, double y_to);
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void curve4_rel(double dx_ctrl1, double dy_ctrl1,
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double dx_ctrl2, double dy_ctrl2,
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double dx_to, double dy_to);
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void curve4(double x_ctrl2, double y_ctrl2,
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double x_to, double y_to);
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void curve4_rel(double x_ctrl2, double y_ctrl2,
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double x_to, double y_to);
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void end_poly(unsigned flags = path_flags_close);
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void close_polygon(unsigned flags = path_flags_none);
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// Accessors
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//--------------------------------------------------------------------
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const container_type& vertices() const { return vertices_; }
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container_type& vertices() { return vertices_; }
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unsigned total_vertices() const;
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void rel_to_abs(double* x, double* y) const;
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unsigned last_vertex(double* x, double* y) const;
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unsigned prev_vertex(double* x, double* y) const;
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double last_x() const;
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double last_y() const;
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unsigned vertex(unsigned idx, double* x, double* y) const;
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unsigned command(unsigned idx) const;
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void modify_vertex(unsigned idx, double x, double y);
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void modify_vertex(unsigned idx, double x, double y, unsigned cmd);
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void modify_command(unsigned idx, unsigned cmd);
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// VertexSource interface
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//--------------------------------------------------------------------
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void rewind(unsigned path_id);
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unsigned vertex(double* x, double* y);
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// Arrange the orientation of a polygon, all polygons in a path,
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// or in all paths. After calling arrange_orientations() or
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// arrange_orientations_all_paths(), all the polygons will have
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// the same orientation, i.e. path_flags_cw or path_flags_ccw
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//--------------------------------------------------------------------
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unsigned arrange_polygon_orientation(unsigned start, path_flags_e orientation);
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unsigned arrange_orientations(unsigned path_id, path_flags_e orientation);
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void arrange_orientations_all_paths(path_flags_e orientation);
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void invert_polygon(unsigned start);
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// Flip all vertices horizontally or vertically,
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// between x1 and x2, or between y1 and y2 respectively
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//--------------------------------------------------------------------
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void flip_x(double x1, double x2);
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void flip_y(double y1, double y2);
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// Concatenate path. The path is added as is.
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//--------------------------------------------------------------------
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template<class VertexSource>
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void concat_path(VertexSource& vs, unsigned path_id = 0)
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{
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double x(0), y(0);
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unsigned cmd;
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vs.rewind(path_id);
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while(!is_stop(cmd = vs.vertex(&x, &y)))
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{
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vertices_.add_vertex(x, y, cmd);
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}
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}
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//--------------------------------------------------------------------
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// Join path. The path is joined with the existing one, that is,
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// it behaves as if the pen of a plotter was always down (drawing)
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template<class VertexSource>
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void join_path(VertexSource& vs, unsigned path_id = 0)
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{
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double x, y;
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unsigned cmd;
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vs.rewind(path_id);
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cmd = vs.vertex(&x, &y);
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if(!is_stop(cmd))
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{
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if(is_vertex(cmd))
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{
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double x0, y0;
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unsigned cmd0 = last_vertex(&x0, &y0);
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if(is_vertex(cmd0))
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{
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if(calc_distance(x, y, x0, y0) > vertex_dist_epsilon)
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{
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if(is_move_to(cmd)) cmd = path_cmd_line_to;
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vertices_.add_vertex(x, y, cmd);
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}
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}
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else
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{
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if(is_stop(cmd0))
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{
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cmd = path_cmd_move_to;
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}
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else
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{
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if(is_move_to(cmd)) cmd = path_cmd_line_to;
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}
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vertices_.add_vertex(x, y, cmd);
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}
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}
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while(!is_stop(cmd = vs.vertex(&x, &y)))
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{
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vertices_.add_vertex(x, y, is_move_to(cmd) ?
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unsigned(path_cmd_line_to) :
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cmd);
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}
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}
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}
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//--------------------------------------------------------------------
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void translate(double dx, double dy, unsigned path_id=0);
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void translate_all_paths(double dx, double dy);
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//--------------------------------------------------------------------
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template<class Trans>
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void transform(const Trans& trans, unsigned path_id=0)
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{
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unsigned num_ver = vertices_.total_vertices();
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for(; path_id < num_ver; path_id++)
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{
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double x, y;
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unsigned cmd = vertices_.vertex(path_id, &x, &y);
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if(is_stop(cmd)) break;
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if(is_vertex(cmd))
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{
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trans.transform(&x, &y);
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vertices_.modify_vertex(path_id, x, y);
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}
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}
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}
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//--------------------------------------------------------------------
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template<class Trans>
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void transform_all_paths(const Trans& trans)
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{
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unsigned idx;
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unsigned num_ver = vertices_.total_vertices();
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for(idx = 0; idx < num_ver; idx++)
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{
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double x, y;
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if(is_vertex(vertices_.vertex(idx, &x, &y)))
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{
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trans.transform(&x, &y);
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vertices_.modify_vertex(idx, x, y);
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}
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}
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}
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private:
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unsigned perceive_polygon_orientation(unsigned start, unsigned end);
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void invert_polygon(unsigned start, unsigned end);
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VertexContainer & vertices_;
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unsigned iterator_;
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double start_x_;
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double start_y_;
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};
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//------------------------------------------------------------------------
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template<class VC>
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unsigned path_adapter<VC>::start_new_path()
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{
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if(!is_stop(vertices_.last_command()))
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{
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vertices_.add_vertex(0.0, 0.0, path_cmd_stop);
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}
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return vertices_.total_vertices();
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::rel_to_abs(double* x, double* y) const
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{
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if(vertices_.total_vertices())
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{
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double x2;
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double y2;
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if(is_vertex(vertices_.last_vertex(&x2, &y2))
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|| !is_stop(vertices_.last_command()))
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{
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*x += x2;
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*y += y2;
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}
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}
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::move_to(double x, double y)
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{
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start_x_ = x;
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start_y_ = y;
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vertices_.add_vertex(x, y, path_cmd_move_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::move_rel(double dx, double dy)
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{
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rel_to_abs(&dx, &dy);
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vertices_.add_vertex(dx, dy, path_cmd_move_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::line_to(double x, double y)
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{
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vertices_.add_vertex(x, y, path_cmd_line_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::line_rel(double dx, double dy)
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{
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rel_to_abs(&dx, &dy);
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vertices_.add_vertex(dx, dy, path_cmd_line_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::hline_to(double x)
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{
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vertices_.add_vertex(x, last_y(), path_cmd_line_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::hline_rel(double dx)
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{
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double dy = 0;
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rel_to_abs(&dx, &dy);
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vertices_.add_vertex(dx, dy, path_cmd_line_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::vline_to(double y)
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{
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vertices_.add_vertex(last_x(), y, path_cmd_line_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::vline_rel(double dy)
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{
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double dx = 0;
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rel_to_abs(&dx, &dy);
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vertices_.add_vertex(dx, dy, path_cmd_line_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::arc_to(double rx, double ry,
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double angle,
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bool large_arc_flag,
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bool sweep_flag,
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double x, double y)
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{
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if(vertices_.total_vertices() && is_vertex(vertices_.last_command()))
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{
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const double epsilon = 1e-30;
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double x0 = 0.0;
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double y0 = 0.0;
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vertices_.last_vertex(&x0, &y0);
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rx = fabs(rx);
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ry = fabs(ry);
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// Ensure radii are valid
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//-------------------------
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if(rx < epsilon || ry < epsilon)
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{
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line_to(x, y);
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return;
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}
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if(calc_distance(x0, y0, x, y) < epsilon)
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{
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// If the endpoints (x, y) and (x0, y0) are identical, then this
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// is equivalent to omitting the elliptical arc segment entirely.
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return;
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}
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bezier_arc_svg a(x0, y0, rx, ry, angle, large_arc_flag, sweep_flag, x, y);
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if(a.radii_ok())
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{
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join_path(a);
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}
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else
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{
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line_to(x, y);
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}
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}
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else
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{
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move_to(x, y);
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}
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::arc_rel(double rx, double ry,
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double angle,
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bool large_arc_flag,
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bool sweep_flag,
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double dx, double dy)
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{
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rel_to_abs(&dx, &dy);
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arc_to(rx, ry, angle, large_arc_flag, sweep_flag, dx, dy);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve3(double x_ctrl, double y_ctrl,
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double x_to, double y_to)
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{
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vertices_.add_vertex(x_ctrl, y_ctrl, path_cmd_curve3);
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vertices_.add_vertex(x_to, y_to, path_cmd_curve3);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve3_rel(double dx_ctrl, double dy_ctrl,
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double dx_to, double dy_to)
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{
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rel_to_abs(&dx_ctrl, &dy_ctrl);
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rel_to_abs(&dx_to, &dy_to);
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vertices_.add_vertex(dx_ctrl, dy_ctrl, path_cmd_curve3);
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vertices_.add_vertex(dx_to, dy_to, path_cmd_curve3);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve3(double x_to, double y_to)
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{
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double x0;
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double y0;
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if(is_vertex(vertices_.last_vertex(&x0, &y0)))
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{
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double x_ctrl;
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double y_ctrl;
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unsigned cmd = vertices_.prev_vertex(&x_ctrl, &y_ctrl);
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if(is_curve(cmd))
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{
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x_ctrl = x0 + x0 - x_ctrl;
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y_ctrl = y0 + y0 - y_ctrl;
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}
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else
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{
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x_ctrl = x0;
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y_ctrl = y0;
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}
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curve3(x_ctrl, y_ctrl, x_to, y_to);
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}
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve3_rel(double dx_to, double dy_to)
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{
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rel_to_abs(&dx_to, &dy_to);
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curve3(dx_to, dy_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve4(double x_ctrl1, double y_ctrl1,
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double x_ctrl2, double y_ctrl2,
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double x_to, double y_to)
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{
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vertices_.add_vertex(x_ctrl1, y_ctrl1, path_cmd_curve4);
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vertices_.add_vertex(x_ctrl2, y_ctrl2, path_cmd_curve4);
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vertices_.add_vertex(x_to, y_to, path_cmd_curve4);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve4_rel(double dx_ctrl1, double dy_ctrl1,
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double dx_ctrl2, double dy_ctrl2,
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double dx_to, double dy_to)
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{
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rel_to_abs(&dx_ctrl1, &dy_ctrl1);
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rel_to_abs(&dx_ctrl2, &dy_ctrl2);
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rel_to_abs(&dx_to, &dy_to);
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vertices_.add_vertex(dx_ctrl1, dy_ctrl1, path_cmd_curve4);
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vertices_.add_vertex(dx_ctrl2, dy_ctrl2, path_cmd_curve4);
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vertices_.add_vertex(dx_to, dy_to, path_cmd_curve4);
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve4(double x_ctrl2, double y_ctrl2,
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double x_to, double y_to)
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{
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double x0;
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double y0;
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if(is_vertex(last_vertex(&x0, &y0)))
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{
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double x_ctrl1;
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double y_ctrl1;
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unsigned cmd = prev_vertex(&x_ctrl1, &y_ctrl1);
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if(is_curve(cmd))
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{
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x_ctrl1 = x0 + x0 - x_ctrl1;
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y_ctrl1 = y0 + y0 - y_ctrl1;
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}
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else
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{
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x_ctrl1 = x0;
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y_ctrl1 = y0;
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}
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curve4(x_ctrl1, y_ctrl1, x_ctrl2, y_ctrl2, x_to, y_to);
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}
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}
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//------------------------------------------------------------------------
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template<class VC>
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void path_adapter<VC>::curve4_rel(double dx_ctrl2, double dy_ctrl2,
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double dx_to, double dy_to)
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{
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rel_to_abs(&dx_ctrl2, &dy_ctrl2);
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rel_to_abs(&dx_to, &dy_to);
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curve4(dx_ctrl2, dy_ctrl2, dx_to, dy_to);
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::end_poly(unsigned flags)
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{
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if(is_vertex(vertices_.last_command()))
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{
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vertices_.add_vertex(start_x_, start_y_, path_cmd_end_poly | flags);
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}
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}
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//------------------------------------------------------------------------
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template<class VC>
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inline void path_adapter<VC>::close_polygon(unsigned flags)
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{
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end_poly(path_flags_close | flags);
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}
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|
|
//------------------------------------------------------------------------
|
|
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 : boost::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
|