xref: /haiku/headers/libs/agg/agg_vpgen_clip_polyline.h (revision c90684742e7361651849be4116d0e5de3a817194)
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_VPGEN_CLIP_POLYLINE_INCLUDED
17 #define AGG_VPGEN_CLIP_POLYLINE_INCLUDED
18 
19 #include "agg_basics.h"
20 
21 namespace agg
22 {
23 
24     //======================================================vpgen_clip_polyline
25     //
26     // See Implementation agg_vpgen_clip_polyline.cpp
27     //
28     class vpgen_clip_polyline
29     {
30     public:
31         vpgen_clip_polyline() :
32             m_clip_box(0, 0, 1, 1),
33             m_x1(0),
34             m_y1(0),
35             m_num_vertices(0),
36             m_vertex(0),
37             m_move_to(false)
38         {
39         }
40 
41         void clip_box(double x1, double y1, double x2, double y2)
42         {
43             m_clip_box.x1 = x1;
44             m_clip_box.y1 = y1;
45             m_clip_box.x2 = x2;
46             m_clip_box.y2 = y2;
47             m_clip_box.normalize();
48         }
49 
50         double x1() const { return m_clip_box.x1; }
51         double y1() const { return m_clip_box.y1; }
52         double x2() const { return m_clip_box.x2; }
53         double y2() const { return m_clip_box.y2; }
54 
55         static bool auto_close()   { return false; }
56         static bool auto_unclose() { return true; }
57 
58         void     reset();
59         void     move_to(double x, double y);
60         void     line_to(double x, double y);
61         unsigned vertex(double* x, double* y);
62 
63     private:
64         rect_d        m_clip_box;
65         double        m_x1;
66         double        m_y1;
67         double        m_x[2];
68         double        m_y[2];
69         unsigned      m_cmd[2];
70         unsigned      m_num_vertices;
71         unsigned      m_vertex;
72         bool          m_move_to;
73     };
74 
75 }
76 
77 
78 #endif
79