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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* -*- mode: c; c-basic-offset: 3 -*-
*
* Copyright 2000 VA Linux Systems Inc., Fremont, California.
*
* 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 (including the next
* paragraph) 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
* VA LINUX SYSTEMS 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.
*/
/* $XFree86: xc/lib/GL/mesa/src/drv/tdfx/tdfx_tris.h,v 1.1 2001/03/21 16:14:28 dawes Exp $ */
/*
* Original rewrite:
* Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
*
* Authors:
* Gareth Hughes <gareth@valinux.com>
* Brian Paul <brianp@valinux.com>
* Keith Whitwell <keithw@valinux.com>
*
*/
#ifndef __TDFX_TRIS_H__
#define __TDFX_TRIS_H__
#ifdef GLX_DIRECT_RENDERING
#include "tdfx_vb.h"
#include "tdfx_render.h"
extern void tdfxDDChooseRenderState( GLcontext *ctx );
extern void tdfxDDTriangleFuncsInit( void );
#define TDFX_FLAT_BIT 0x01
#define TDFX_OFFSET_BIT 0x02
#define TDFX_TWOSIDE_BIT 0x04
#define TDFX_CLIPRECT_BIT 0x10
#define TDFX_FALLBACK_BIT 0x20
#define TDFX_MAX_TRIFUNC 0x40
static __inline void tdfx_draw_triangle( tdfxContextPtr fxMesa,
tdfxVertex *v0,
tdfxVertex *v1,
tdfxVertex *v2 )
{
fxMesa->Glide.grDrawTriangle( v0, v1, v2 );
}
static __inline void tdfx_draw_point( tdfxContextPtr fxMesa,
tdfxVertex *tmp, float sz )
{
if ( sz <= 1.0 ) {
/* Save and restore original x,y rather than copying whole
* vertex.
*/
GLfloat x = tmp->v.x, y = tmp->v.y;
tmp->v.x += PNT_X_OFFSET - TRI_X_OFFSET;
tmp->v.y += PNT_Y_OFFSET - TRI_Y_OFFSET;
fxMesa->Glide.grDrawPoint( tmp );
tmp->v.x = x;
tmp->v.y = y;
}
else {
const GLfloat xLeft = tmp->v.x - 0.5 * sz - TRI_X_OFFSET + PNT_X_OFFSET;
const GLfloat xRight = tmp->v.x + 0.5 * sz - TRI_X_OFFSET + PNT_X_OFFSET;
const GLfloat yBot = tmp->v.y - 0.5 * sz - TRI_Y_OFFSET + PNT_Y_OFFSET;
const GLfloat yTop = tmp->v.y + 0.5 * sz - TRI_Y_OFFSET + PNT_Y_OFFSET;
tdfxVertex verts[4];
verts[0] = *tmp;
verts[1] = *tmp;
verts[2] = *tmp;
verts[3] = *tmp;
verts[0].v.x = xLeft;
verts[0].v.y = yBot;
verts[1].v.x = xRight;
verts[1].v.y = yBot;
verts[2].v.x = xRight;
verts[2].v.y = yTop;
verts[3].v.x = xLeft;
verts[3].v.y = yTop;
fxMesa->Glide.grDrawVertexArrayContiguous( GR_TRIANGLE_FAN, 4, verts,
sizeof(tdfxVertex) );
}
}
static __inline void tdfx_draw_line( tdfxContextPtr fxMesa,
tdfxVertex *tmp0,
tdfxVertex *tmp1,
float width )
{
if ( width <= 1.0 )
{
/* Faster to save and restore 4 dwords than to copy 32 dwords.
*/
GLfloat x0 = tmp0->v.x, y0 = tmp0->v.y;
GLfloat x1 = tmp1->v.x, y1 = tmp1->v.y;
tmp0->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
tmp0->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
tmp1->v.x += LINE_X_OFFSET - TRI_X_OFFSET;
tmp1->v.y += LINE_Y_OFFSET - TRI_Y_OFFSET;
fxMesa->Glide.grDrawLine(tmp0, tmp1);
tmp0->v.x = x0;
tmp0->v.y = y0;
tmp1->v.x = x1;
tmp1->v.y = y1;
}
else
{
tdfxVertex verts[4];
float dx, dy, ix, iy;
dx = tmp0->v.x - tmp1->v.x;
dy = tmp0->v.y - tmp1->v.y;
if (dx * dx > dy * dy) {
iy = width * .5;
ix = 0;
} else {
iy = 0;
ix = width * .5;
}
verts[0] = *tmp0;
verts[1] = *tmp0;
verts[2] = *tmp1;
verts[3] = *tmp1;
verts[0].v.x = tmp0->v.x - ix;
verts[0].v.y = tmp0->v.y - iy;
verts[1].v.x = tmp0->v.x + ix;
verts[1].v.y = tmp0->v.y + iy;
verts[2].v.x = tmp1->v.x + ix;
verts[2].v.y = tmp1->v.y + iy;
verts[3].v.x = tmp1->v.x - ix;
verts[3].v.y = tmp1->v.y - iy;
fxMesa->Glide.grDrawVertexArrayContiguous( GR_TRIANGLE_FAN, 4, verts,
sizeof(tdfxVertex) );
}
}
void tdfxDDToggleTriCliprects( GLcontext *ctx );
#endif /* GLX_DIRECT_RENDERING */
#endif /* __TDFX_TRIS_H__ */
|
