1f220fa62Smrg/*
2f220fa62Smrg * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3f220fa62Smrg * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4f220fa62Smrg *
5f220fa62Smrg * Permission is hereby granted, free of charge, to any person obtaining a
6f220fa62Smrg * copy of this software and associated documentation files (the "Software"),
7f220fa62Smrg * to deal in the Software without restriction, including without limitation
8f220fa62Smrg * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9f220fa62Smrg * and/or sell copies of the Software, and to permit persons to whom the
10f220fa62Smrg * Software is furnished to do so, subject to the following conditions:
11f220fa62Smrg *
12f220fa62Smrg * The above copyright notice including the dates of first publication and
13f220fa62Smrg * either this permission notice or a reference to
14f220fa62Smrg * http://oss.sgi.com/projects/FreeB/
15f220fa62Smrg * shall be included in all copies or substantial portions of the Software.
16f220fa62Smrg *
17f220fa62Smrg * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18f220fa62Smrg * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19f220fa62Smrg * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20f220fa62Smrg * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21f220fa62Smrg * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22f220fa62Smrg * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23f220fa62Smrg * SOFTWARE.
24f220fa62Smrg *
25f220fa62Smrg * Except as contained in this notice, the name of Silicon Graphics, Inc.
26f220fa62Smrg * shall not be used in advertising or otherwise to promote the sale, use or
27f220fa62Smrg * other dealings in this Software without prior written authorization from
28f220fa62Smrg * Silicon Graphics, Inc.
29f220fa62Smrg */
30f220fa62Smrg
31f220fa62Smrg/*
32f220fa62Smrg * arctess.h
33f220fa62Smrg *
34f220fa62Smrg */
35f220fa62Smrg
36f220fa62Smrg#ifndef __gluarctess_h_
37f220fa62Smrg#define __gluarctess_h_
38f220fa62Smrg
39f220fa62Smrg#include "defines.h"
40f220fa62Smrg#include "types.h"
41f220fa62Smrg#include "arc.h"
42f220fa62Smrg
43f220fa62Smrgstruct BezierArc;
44f220fa62Smrgclass Pool;
45f220fa62Smrgclass TrimVertexPool;
46f220fa62Smrg
47f220fa62Smrgclass ArcTessellator {
48f220fa62Smrgpublic:
49f220fa62Smrg			ArcTessellator( TrimVertexPool&, Pool& );
50f220fa62Smrg			~ArcTessellator( void );
51f220fa62Smrg    void		bezier( Arc_ptr, REAL, REAL, REAL, REAL );
52f220fa62Smrg    void		pwl( Arc_ptr, REAL, REAL, REAL, REAL, REAL );
53f220fa62Smrg    void		pwl_left( Arc_ptr, REAL, REAL, REAL, REAL );
54f220fa62Smrg    void		pwl_right( Arc_ptr, REAL, REAL, REAL, REAL );
55f220fa62Smrg    void		pwl_top( Arc_ptr, REAL, REAL, REAL, REAL );
56f220fa62Smrg    void		pwl_bottom( Arc_ptr, REAL, REAL, REAL, REAL );
57f220fa62Smrg    void		tessellateLinear( Arc_ptr, REAL, REAL, int );
58f220fa62Smrg    void		tessellateNonlinear( Arc_ptr, REAL, REAL, int );
59f220fa62Smrgprivate:
60f220fa62Smrg    static const REAL 	gl_Bernstein[][MAXORDER][MAXORDER];
61f220fa62Smrg    Pool&		pwlarcpool;
62f220fa62Smrg    TrimVertexPool&	trimvertexpool;
63f220fa62Smrg    static void		trim_power_coeffs( BezierArc *, REAL[MAXORDER], int );
64f220fa62Smrg};
65f220fa62Smrg
66f220fa62Smrg#endif /* __gluarctess_h_ */
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