blob: f22af0acb888ae936ea997e3b263c1f5e202b0a3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.3
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://www.antigrain.com
//----------------------------------------------------------------------------
//
// classes: vertex_iterator
// vertex_source_adaptor
// vertex_source_adaptor_with_id
//
//----------------------------------------------------------------------------
#ifndef AGG_VERTEX_ITERATOR_INCLUDED
#define AGG_VERTEX_ITERATOR_INCLUDED
#include "agg_basics.h"
namespace agg
{
//---------------------------------------------------------vertex_iterator
template<class VertexSource> class vertex_iterator
{
public:
vertex_iterator() {}
vertex_iterator(unsigned cmd) { m_vertex.cmd = cmd; }
vertex_iterator(const vertex_iterator& i) : m_vs(i.m_vs), m_vertex(i.m_vertex) {}
vertex_iterator(VertexSource& vs, unsigned id) : m_vs(&vs)
{
m_vs->rewind(id);
m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y);
}
vertex_iterator& operator++()
{
m_vertex.cmd = m_vs->vertex(&m_vertex.x, &m_vertex.y);
return *this;
}
const vertex_type& operator*() const { return m_vertex; }
const vertex_type* operator->() const { return &m_vertex; }
bool operator != (const vertex_iterator& i)
{
return m_vertex.cmd != i.m_vertex.cmd;
}
private:
VertexSource* m_vs;
vertex_type m_vertex;
};
//---------------------------------------------------vertex_source_adaptor
template<class VertexContainer> class vertex_source_adaptor
{
public:
vertex_source_adaptor(const VertexContainer& container) :
m_container(&container) {}
void rewind(unsigned)
{
m_iterator = m_container->begin();
m_end = m_container->end();
}
unsigned vertex(double* x, double* y)
{
unsigned cmd = path_cmd_stop;
if(m_iterator != m_end)
{
*x = m_iterator->x;
*y = m_iterator->y;
cmd = m_iterator->cmd;
++m_iterator;
}
return cmd;
}
private:
const VertexContainer* m_container;
typename VertexContainer::const_iterator m_iterator;
typename VertexContainer::const_iterator m_end;
};
//-------------------------------------------vertex_source_adaptor_with_id
template<class VertexContainer> class vertex_source_adaptor_with_id
{
public:
vertex_source_adaptor_with_id(const VertexContainer& container) :
m_container(&container) {}
void rewind(unsigned id)
{
m_iterator = m_container->begin(id);
m_end = m_container->end();
}
unsigned vertex(double* x, double* y)
{
unsigned cmd = path_cmd_stop;
if(m_iterator != m_end)
{
*x = m_iterator->x;
*y = m_iterator->y;
cmd = m_iterator->cmd;
++m_iterator;
}
return cmd;
}
private:
const VertexContainer* m_container;
typename VertexContainer::const_iterator m_iterator;
typename VertexContainer::const_iterator m_end;
};
}
#endif
|
