1
2//----------------------------------------------------------------------------
3// Anti-Grain Geometry - Version 2.3
4// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
5//
6// Permission to copy, use, modify, sell and distribute this software
7// is granted provided this copyright notice appears in all copies.
8// This software is provided "as is" without express or implied
9// warranty, and with no claim as to its suitability for any purpose.
10//
11//----------------------------------------------------------------------------
12// Contact: mcseem@antigrain.com
13//          mcseemagg@yahoo.com
14//          http://www.antigrain.com
15//----------------------------------------------------------------------------
16//
17// Line dash generator
18//
19//----------------------------------------------------------------------------
20#ifndef AGG_VCGEN_DASH_INCLUDED
21#define AGG_VCGEN_DASH_INCLUDED
22#include "agg_basics.h"
23#include "agg_vertex_sequence.h"
24namespace agg
25{
26class vcgen_dash : public CFX_Object
27{
28    enum max_dashes_e {
29        max_dashes = 32
30    };
31    enum status_e {
32        initial,
33        ready,
34        polyline,
35        stop
36    };
37public:
38    typedef vertex_sequence<vertex_dist, 6> vertex_storage;
39    vcgen_dash();
40    void remove_all_dashes();
41    void add_dash(FX_FLOAT dash_len, FX_FLOAT gap_len);
42    void dash_start(FX_FLOAT ds);
43    void shorten(FX_FLOAT s)
44    {
45        m_shorten = s;
46    }
47    double shorten() const
48    {
49        return m_shorten;
50    }
51    void remove_all();
52    void add_vertex(FX_FLOAT x, FX_FLOAT y, unsigned cmd);
53    void     rewind(unsigned path_id);
54    unsigned vertex(FX_FLOAT* x, FX_FLOAT* y);
55private:
56    vcgen_dash(const vcgen_dash&);
57    const vcgen_dash& operator = (const vcgen_dash&);
58    void calc_dash_start(FX_FLOAT ds);
59    FX_FLOAT     m_dashes[max_dashes];
60    FX_FLOAT		m_total_dash_len;
61    unsigned        m_num_dashes;
62    FX_FLOAT     m_dash_start;
63    FX_FLOAT     m_shorten;
64    FX_FLOAT     m_curr_dash_start;
65    unsigned        m_curr_dash;
66    FX_FLOAT     m_curr_rest;
67    const vertex_dist* m_v1;
68    const vertex_dist* m_v2;
69    vertex_storage m_src_vertices;
70    unsigned       m_closed;
71    status_e       m_status;
72    unsigned       m_src_vertex;
73};
74}
75#endif
76