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// class conv_transform
17//
18//----------------------------------------------------------------------------
19#ifndef AGG_CONV_TRANSFORM_INCLUDED
20#define AGG_CONV_TRANSFORM_INCLUDED
21
22#include "agg_basics.h"
23#include "agg_trans_affine.h"
24
25namespace agg
26{
27
28    //----------------------------------------------------------conv_transform
29    template<class VertexSource, class Transformer=trans_affine> class conv_transform
30    {
31    public:
32        conv_transform(VertexSource& source, const Transformer& tr) :
33            m_source(&source), m_trans(&tr) {}
34        void attach(VertexSource& source) { m_source = &source; }
35
36        void rewind(unsigned path_id)
37        {
38            m_source->rewind(path_id);
39        }
40
41        unsigned vertex(double* x, double* y)
42        {
43            unsigned cmd = m_source->vertex(x, y);
44            if(is_vertex(cmd))
45            {
46                m_trans->transform(x, y);
47            }
48            return cmd;
49        }
50
51        void transformer(const Transformer& tr)
52        {
53            m_trans = &tr;
54        }
55
56    private:
57        conv_transform(const conv_transform<VertexSource>&);
58        const conv_transform<VertexSource>&
59            operator = (const conv_transform<VertexSource>&);
60
61        VertexSource*      m_source;
62        const Transformer* m_trans;
63    };
64
65
66}
67
68#endif
69