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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/* -*- mode: C; tab-width:8; c-basic-offset:2 -*- */
/*
* 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.
*
*
* Original Mesa / 3Dfx device driver (C) 1999 David Bucciarelli, by the
* terms stated above.
*
* Thank you for your contribution, David!
*
* Please make note of the above copyright/license statement. If you
* contributed code or bug fixes to this code under the previous (GNU
* Library) license and object to the new license, your code will be
* removed at your request. Please see the Mesa docs/COPYRIGHT file
* for more information.
*
* Additional Mesa/3Dfx driver developers:
* Daryll Strauss <daryll@precisioninsight.com>
* Keith Whitwell <keith@precisioninsight.com>
*
* See fxapi.h for more revision/author details.
*/
/*
* Notes: the folowing code works only if count is > start.
* Corrently we are looking for the pattern:
* v0,v1,v2 v2,v1,v3, v2,v3,v4....
*
* For this:
* #define STRIP0 ((u1 == v1) && (u2 == v0))
* #define STRIP1 ((u0 == v0) && (u2 == v1))
*
*/
static void TAG(render_vb_triangles_smooth_indirect_sd)
( struct vertex_buffer *VB,
GLuint start,
GLuint count,
GLuint parity)
{
GLint u0,u1,u2;
GLint v0,v1,v2;
GLuint *elt = VB->EltPtr->data;
int i;
LOCAL_VARS
INIT(GL_TRIANGLES);
elt = &elt[start-1];
u0 = *(++elt);
u1 = *(++elt);
u2 = *(++elt);
i = start+3;
while (i < count)
{
v0 = *(++elt);
v1 = *(++elt);
v2 = *(++elt);
if (CLIPPED(u0,u1,u2))
{
if (!CULLED(u0,u1,u2)) SENDCLIPTRI(u0,u1,u2);
}
else
{
if (STRIP0(u,v))
{
int is_strips = 1;
int parity = 0;
STRIPSLOCAL_VAR
FLUSHTRI();
STARTSTRIPS(u0,u1,u2);
while (is_strips && i < count)
{
SENDSTRIPS(v2);
u0 = v0; u1 = v1; u2 = v2; i+= 3;
v0 = *(++elt);
v1 = *(++elt);
v2 = *(++elt);
if (parity) {
is_strips = STRIP0(u,v);
parity = 0;
} else {
is_strips = STRIP1(u,v);
parity = 1;
}
}
FLUSHSTRIPS();
if (i >= count)
return;
}
else
{
SENDTRI(u0,u1,u2);
}
}
u0 = v0; u1 = v1; u2 = v2; i+= 3;
}
if (CLIPPED(u0,u1,u2))
{
if (!CULLED(u0,u1,u2)) SENDCLIPTRI(u0,u1,u2);
}
else
{
SENDTRI(u0,u1,u2);
}
FLUSHTRI();
}
#ifndef PRESERVE_VB_DEFS
#undef SENDTRI
#undef STRIP0
#undef STRIP1
#undef LOCAL_VARS
#undef STRIPSLOCAL_VAR
#undef INIT
#undef SENDTRI
#undef FLUSHTRI
#undef STARTSTRIPS
#undef SENDSTRIPS
#undef FLUSHSTRIPS
#undef CLIPPED
#undef CULLED
#undef SENDCLIPTRI
#endif
#ifndef PRESERVE_TAG
#undef TAG
#endif
#undef PRESERVE_VB_DEFS
#undef PRESERVE_TAG
|
