1 /*
2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3  * Copyright (C) 1991-2000 Silicon Graphics, 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 "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice including the dates of first publication and
13  * either this permission notice or a reference to
14  * http://oss.sgi.com/projects/FreeB/
15  * shall be included in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23  * SOFTWARE.
24  *
25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
26  * shall not be used in advertising or otherwise to promote the sale, use or
27  * other dealings in this Software without prior written authorization from
28  * Silicon Graphics, Inc.
29  */
30 
31 /*
32  * monotonizer.h
33  *
34  */
35 
36 #ifndef __glumonotonizer_h_
37 #define __glumonotonizer_h_
38 
39 #include "mysetjmp.h"
40 #include "types.h"
41 
42 class Arc;
43 class ArcTessellator;
44 class Pool;
45 class Bin;
46 class PwlArcPool;
47 class Mapdesc;
48 
49 class Monotonizer {
50     ArcTessellator&	arctessellator;
51     Pool&		arcpool;
52     Pool&		pwlarcpool;
53     jmp_buf&		nurbsJmpBuf;
54 
55     enum dir 		{ down, same, up, none };
56     void		tessellate( Arc *, REAL );
57     void		monotonize( Arc *, Bin & );
58     int			isMonotone( Arc * );
59 public:
60     			Monotonizer( ArcTessellator& at, Pool& ap, Pool& p, jmp_buf& j )
61 				: arctessellator(at), arcpool(ap), pwlarcpool(p), nurbsJmpBuf(j) {}
62     int			decompose( Bin &, REAL );
63 };
64 #endif /* __glumonotonizer_h_ */
65