1//----------------------------------------------------------------------------
2// Anti-Grain Geometry - Version 2.4
3// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
4//
5// Permission to copy, use, modify, sell and distribute this software
6// is granted provided this copyright notice appears in all copies.
7// This software is provided "as is" without express or implied
8// warranty, and with no claim as to its suitability for any purpose.
9//
10//----------------------------------------------------------------------------
11// Contact: mcseem@antigrain.com
12//          mcseemagg@yahoo.com
13//          http://www.antigrain.com
14//----------------------------------------------------------------------------
15
16#ifndef AGG_TRANS_SINGLE_PATH_INCLUDED
17#define AGG_TRANS_SINGLE_PATH_INCLUDED
18
19#include "agg_basics.h"
20#include "agg_vertex_sequence.h"
21
22namespace agg
23{
24
25    // See also: agg_trans_single_path.cpp
26    //
27    //-------------------------------------------------------trans_single_path
28    class trans_single_path
29    {
30        enum status_e
31        {
32            initial,
33            making_path,
34            ready
35        };
36
37    public:
38        typedef vertex_sequence<vertex_dist, 6> vertex_storage;
39
40        trans_single_path();
41
42        //--------------------------------------------------------------------
43        void   base_length(double v)  { m_base_length = v; }
44        double base_length() const { return m_base_length; }
45
46        //--------------------------------------------------------------------
47        void preserve_x_scale(bool f) { m_preserve_x_scale = f;    }
48        bool preserve_x_scale() const { return m_preserve_x_scale; }
49
50        //--------------------------------------------------------------------
51        void reset();
52        void move_to(double x, double y);
53        void line_to(double x, double y);
54        void finalize_path();
55
56        //--------------------------------------------------------------------
57        template<class VertexSource>
58        void add_path(VertexSource& vs, unsigned path_id=0)
59        {
60            double x;
61            double y;
62
63            unsigned cmd;
64            vs.rewind(path_id);
65            while(!is_stop(cmd = vs.vertex(&x, &y)))
66            {
67                if(is_move_to(cmd))
68                {
69                    move_to(x, y);
70                }
71                else
72                {
73                    if(is_vertex(cmd))
74                    {
75                        line_to(x, y);
76                    }
77                }
78            }
79            finalize_path();
80        }
81
82        //--------------------------------------------------------------------
83        double total_length() const;
84        void transform(double *x, double *y) const;
85
86    private:
87        vertex_storage m_src_vertices;
88        double         m_base_length;
89        double         m_kindex;
90        status_e       m_status;
91        bool           m_preserve_x_scale;
92    };
93
94
95}
96
97#endif
98