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_CONV_CONCAT_INCLUDED
17#define AGG_CONV_CONCAT_INCLUDED
18
19#include "agg_basics.h"
20
21namespace agg
22{
23    //=============================================================conv_concat
24    // Concatenation of two paths. Usually used to combine lines or curves
25    // with markers such as arrowheads
26    template<class VS1, class VS2> class conv_concat
27    {
28    public:
29        conv_concat(VS1& source1, VS2& source2) :
30            m_source1(&source1), m_source2(&source2), m_status(2) {}
31        void attach1(VS1& source) { m_source1 = &source; }
32        void attach2(VS2& source) { m_source2 = &source; }
33
34
35        void rewind(unsigned path_id)
36        {
37            m_source1->rewind(path_id);
38            m_source2->rewind(0);
39            m_status = 0;
40        }
41
42        unsigned vertex(double* x, double* y)
43        {
44            unsigned cmd;
45            if(m_status == 0)
46            {
47                cmd = m_source1->vertex(x, y);
48                if(!is_stop(cmd)) return cmd;
49                m_status = 1;
50            }
51            if(m_status == 1)
52            {
53                cmd = m_source2->vertex(x, y);
54                if(!is_stop(cmd)) return cmd;
55                m_status = 2;
56            }
57            return path_cmd_stop;
58        }
59
60    private:
61        conv_concat(const conv_concat<VS1, VS2>&);
62        const conv_concat<VS1, VS2>&
63            operator = (const conv_concat<VS1, VS2>&);
64
65        VS1* m_source1;
66        VS2* m_source2;
67        int  m_status;
68
69    };
70}
71
72
73#endif
74