1 /**************************************************************************
2  *
3  * Copyright 2009 VMware, Inc.  All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the
7  * "Software"), to deal in the Software without restriction, including
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10  * permit persons to whom the Software is furnished to do so, subject to
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13  * The above copyright notice and this permission notice (including the
14  * next paragraph) shall be included in all copies or substantial portions
15  * of the Software.
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17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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26 
27 #ifndef ARC_H
28 #define ARC_H
29 
30 #include "VG/openvg.h"
31 
32 struct polygon;
33 struct matrix;
34 struct stroker;
35 struct path;
36 
37 struct arc {
38    VGPathSegment type;
39 
40    VGfloat cx, cy;
41 
42    VGfloat a, b;
43 
44    VGfloat theta;
45    VGfloat cos_theta, sin_theta;
46 
47    VGfloat eta1;
48    VGfloat eta2;
49 
50    VGfloat x1, y1, x2, y2;
51 
52    VGboolean is_valid;
53 };
54 
55 void arc_init(struct arc *arc,
56               VGPathSegment type,
57               VGfloat x1, VGfloat y1,
58               VGfloat x2, VGfloat y2,
59               VGfloat rh, VGfloat rv,
60               VGfloat rot);
61 
62 void arc_add_to_polygon(struct arc *arc,
63                         struct polygon *poly,
64                         struct matrix *matrix);
65 
66 
67 void arc_to_path(struct arc *arc,
68                  struct path *p,
69                  struct matrix *matrix);
70 
71 void arc_stroke_cb(struct arc *arc,
72                    struct stroker *stroke,
73                    struct matrix *matrix);
74 
75 void arc_stroker_emit(struct arc *arc,
76                       struct stroker *stroke,
77                       struct matrix *matrix);
78 
79 
80 #endif
81