1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
/* $Id: clip.h,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.1
*
* Copyright (C) 1999 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef CLIP_H
#define CLIP_H
#include "types.h"
#ifdef DEBUG
# define GL_VIEWCLIP_POINT( V ) gl_viewclip_point( V )
#else
# define GL_VIEWCLIP_POINT( V ) \
( (V)[0] <= (V)[3] && (V)[0] >= -(V)[3] \
&& (V)[1] <= (V)[3] && (V)[1] >= -(V)[3] \
&& (V)[2] <= (V)[3] && (V)[2] >= -(V)[3] )
#endif
typedef GLuint (*clip_line_func)( struct vertex_buffer *VB,
GLuint *i, GLuint *j,
GLubyte mask);
typedef GLuint (*clip_poly_func)( struct vertex_buffer *VB,
GLuint n, GLuint vlist[],
GLubyte mask );
extern clip_poly_func gl_poly_clip_tab[5];
extern clip_line_func gl_line_clip_tab[5];
extern void gl_init_clip(void);
extern GLuint gl_viewclip_point( const GLfloat v[] );
extern GLuint gl_userclip_point( GLcontext* ctx, const GLfloat v[] );
extern void gl_user_cliptest( struct vertex_buffer *VB );
extern void gl_ClipPlane( GLcontext* ctx,
GLenum plane, const GLfloat *equation );
extern void gl_GetClipPlane( GLcontext* ctx,
GLenum plane, GLdouble *equation );
/*
* Clipping interpolation functions
*/
extern void gl_clip_interp_all( struct vertex_buffer *VB,
GLuint dst, GLfloat t, GLuint in, GLuint out );
extern void gl_clip_interp_color_tex( struct vertex_buffer *VB,
GLuint dst, GLfloat t, GLuint in, GLuint out );
extern void gl_clip_interp_tex( struct vertex_buffer *VB,
GLuint dst, GLfloat t, GLuint in, GLuint out );
extern void gl_clip_interp_color( struct vertex_buffer *VB,
GLuint dst, GLfloat t, GLuint in, GLuint out );
extern void gl_clip_interp_none( struct vertex_buffer *VB,
GLuint dst, GLfloat t, GLuint in, GLuint out );
extern void gl_update_userclip( GLcontext *ctx );
extern void gl_update_clipmask( GLcontext *ctx );
#endif
|
