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vb.h
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1/* $Id: vb.h,v 1.12 1997/08/13 02:07:17 brianp Exp $ */
2
3/*
4 * Mesa 3-D graphics library
5 * Version: 2.4
6 * Copyright (C) 1995-1997 Brian Paul
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the Free
20 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23
24/*
25 * $Log: vb.h,v $
26 * Revision 1.12 1997/08/13 02:07:17 brianp
27 * set VB_MAX to 72 is using Glide for better performance (David Bucciarelli)
28 *
29 * Revision 1.11 1997/06/21 21:30:59 brianp
30 * updated many comments
31 *
32 * Revision 1.10 1997/06/20 02:08:23 brianp
33 * changed color components from GLfixed to GLubyte
34 *
35 * Revision 1.9 1997/05/09 22:41:55 brianp
36 * replaced gl_init_vb() with gl_alloc_vb()
37 *
38 * Revision 1.8 1997/04/24 00:29:36 brianp
39 * added TexCoordSize
40 *
41 * Revision 1.7 1997/04/20 15:59:30 brianp
42 * removed VERTEX2_BIT stuff
43 *
44 * Revision 1.6 1997/04/12 16:21:35 brianp
45 * added CLIP_* flags and gl_init_vb()
46 *
47 * Revision 1.5 1997/04/07 02:59:59 brianp
48 * added VertexSizeMask
49 *
50 * Revision 1.4 1997/04/02 03:13:12 brianp
51 * removed Unclipped[], added ClipMask[], ClipOrMask, ClipAndMask
52 *
53 * Revision 1.3 1996/12/18 19:59:44 brianp
54 * removed the material bitmask constants
55 *
56 * Revision 1.2 1996/09/27 01:31:17 brianp
57 * added gl_init_vb() prototype
58 *
59 * Revision 1.1 1996/09/13 01:38:16 brianp
60 * Initial revision
61 *
62 */
63
64
65/*
66 * OVERVIEW: The vertices defined between glBegin() and glEnd()
67 * are accumulated in the vertex buffer. When either the
68 * vertex buffer becomes filled or glEnd() is called, we must flush
69 * the buffer. That is, we apply the vertex transformations, compute
70 * lighting, fog, texture coordinates etc. Then, we can render the
71 * vertices as points, lines or polygons by calling the gl_render_vb()
72 * function in render.c
73 *
74 */
75
76
77#ifndef VB_H
78#define VB_H
79
80
81#include "types.h"
82
83
84
85/* Flush VB when this number of vertices is accumulated: (a multiple of 12) */
86#define VB_MAX 480
87
88/* Arrays must also accomodate new vertices from clipping: */
89#define VB_SIZE (VB_MAX + 2 * (6 + MAX_CLIP_PLANES))
90
91
92/* Bit values for VertexSizeMask, below. */
93/*#define VERTEX2_BIT 1*/
94#define VERTEX3_BIT 2
95#define VERTEX4_BIT 4
96
97
98
100 GLfloat Obj[VB_SIZE][4]; /* Object coords */
101 GLfloat Eye[VB_SIZE][4]; /* Eye coords */
102 GLfloat Clip[VB_SIZE][4]; /* Clip coords */
103 GLfloat Win[VB_SIZE][3]; /* Window coords */
104
105 GLfloat Normal[VB_SIZE][3]; /* Normal vectors */
106
107 GLubyte Fcolor[VB_SIZE][4]; /* Front colors (RGBA) */
108 GLubyte Bcolor[VB_SIZE][4]; /* Back colors (RGBA) */
109 GLubyte (*Color)[4]; /* == Fcolor or Bcolor */
110
111 GLuint Findex[VB_SIZE]; /* Front color indexes */
112 GLuint Bindex[VB_SIZE]; /* Back color indexes */
113 GLuint *Index; /* == Findex or Bindex */
114
115 GLboolean Edgeflag[VB_SIZE]; /* Polygon edge flags */
116
117 GLfloat TexCoord[VB_SIZE][4];/* Texture coords */
118
119 GLubyte ClipMask[VB_SIZE]; /* bitwise-OR of CLIP_* values, below */
120 GLubyte ClipOrMask; /* bitwise-OR of all ClipMask[] values */
121 GLubyte ClipAndMask; /* bitwise-AND of all ClipMask[] values */
122
123 GLuint Start; /* First vertex to process */
124 GLuint Count; /* Number of vertexes in buffer */
125 GLuint Free; /* Next empty position for clipping */
126
127 GLuint VertexSizeMask; /* Bitwise-or of VERTEX[234]_BIT */
128 GLuint TexCoordSize; /* Either 2 or 4 */
129 GLboolean MonoColor; /* Do all vertices have same color? */
130 GLboolean MonoNormal; /* Do all vertices have same normal? */
131 GLboolean MonoMaterial; /* Do all vertices have same material? */
132
133 /* to handle glMaterial calls inside glBegin/glEnd: */
134 GLuint MaterialMask[VB_SIZE]; /* Which material values to change */
135 struct gl_material Material[VB_SIZE][2]; /* New material values */
136};
137
138
139
140/* Vertex buffer clipping flags */
141#define CLIP_RIGHT_BIT 0x01
142#define CLIP_LEFT_BIT 0x02
143#define CLIP_TOP_BIT 0x04
144#define CLIP_BOTTOM_BIT 0x08
145#define CLIP_NEAR_BIT 0x10
146#define CLIP_FAR_BIT 0x20
147#define CLIP_USER_BIT 0x40
148#define CLIP_ALL_BITS 0x3f
149
150#define CLIP_ALL 1
151#define CLIP_NONE 2
152#define CLIP_SOME 3
153
154
155extern struct vertex_buffer *gl_alloc_vb(void);
156
157
158#endif
unsigned char GLubyte
Definition: gl.h:157
float GLfloat
Definition: gl.h:161
unsigned int GLuint
Definition: gl.h:159
unsigned char GLboolean
Definition: gl.h:151
GLfloat Normal[VB_SIZE][3]
Definition: vb.h:105
GLfloat TexCoord[VB_SIZE][4]
Definition: vb.h:117
GLuint TexCoordSize
Definition: vb.h:128
GLubyte Bcolor[VB_SIZE][4]
Definition: vb.h:108
GLboolean MonoMaterial
Definition: vb.h:131
GLuint Free
Definition: vb.h:125
GLuint Start
Definition: vb.h:123
GLuint MaterialMask[VB_SIZE]
Definition: vb.h:134
GLuint Count
Definition: vb.h:124
GLfloat Win[VB_SIZE][3]
Definition: vb.h:103
GLubyte ClipAndMask
Definition: vb.h:121
GLfloat Clip[VB_SIZE][4]
Definition: vb.h:102
GLuint * Index
Definition: vb.h:113
GLubyte Fcolor[VB_SIZE][4]
Definition: vb.h:107
GLboolean MonoColor
Definition: vb.h:129
GLboolean Edgeflag[VB_SIZE]
Definition: vb.h:115
GLboolean MonoNormal
Definition: vb.h:130
struct gl_material Material[VB_SIZE][2]
Definition: vb.h:135
GLubyte ClipOrMask
Definition: vb.h:120
GLuint Bindex[VB_SIZE]
Definition: vb.h:112
GLfloat Eye[VB_SIZE][4]
Definition: vb.h:101
GLuint Findex[VB_SIZE]
Definition: vb.h:111
GLuint VertexSizeMask
Definition: vb.h:127
GLubyte ClipMask[VB_SIZE]
Definition: vb.h:119
#define VB_SIZE
Definition: vb.h:89
struct vertex_buffer * gl_alloc_vb(void)
Definition: vb.c:65