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/* $Id: vb.h,v 1.11 1997/06/21 21:30:59 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 2.3
* Copyright (C) 1995-1997 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* $Log: vb.h,v $
* Revision 1.11 1997/06/21 21:30:59 brianp
* updated many comments
*
* Revision 1.10 1997/06/20 02:08:23 brianp
* changed color components from GLfixed to GLubyte
*
* Revision 1.9 1997/05/09 22:41:55 brianp
* replaced gl_init_vb() with gl_alloc_vb()
*
* Revision 1.8 1997/04/24 00:29:36 brianp
* added TexCoordSize
*
* Revision 1.7 1997/04/20 15:59:30 brianp
* removed VERTEX2_BIT stuff
*
* Revision 1.6 1997/04/12 16:21:35 brianp
* added CLIP_* flags and gl_init_vb()
*
* Revision 1.5 1997/04/07 02:59:59 brianp
* added VertexSizeMask
*
* Revision 1.4 1997/04/02 03:13:12 brianp
* removed Unclipped[], added ClipMask[], ClipOrMask, ClipAndMask
*
* Revision 1.3 1996/12/18 19:59:44 brianp
* removed the material bitmask constants
*
* Revision 1.2 1996/09/27 01:31:17 brianp
* added gl_init_vb() prototype
*
* Revision 1.1 1996/09/13 01:38:16 brianp
* Initial revision
*
*/
/*
* OVERVIEW: The vertices defined between glBegin() and glEnd()
* are accumulated in the vertex buffer. When either the
* vertex buffer becomes filled or glEnd() is called, we must flush
* the buffer. That is, we apply the vertex transformations, compute
* lighting, fog, texture coordinates etc. Then, we can render the
* vertices as points, lines or polygons by calling the gl_render_vb()
* function in render.c
*
*/
#ifndef VB_H
#define VB_H
#include "types.h"
/* Flush VB when this number of vertices is accumulated: (a multiple of 12) */
#define VB_MAX 480
/* Arrays must also accomodate new vertices from clipping: */
#define VB_SIZE (VB_MAX + 2 * (6 + MAX_CLIP_PLANES))
/* Bit values for VertexSizeMask, below. */
/*#define VERTEX2_BIT 1*/
#define VERTEX3_BIT 2
#define VERTEX4_BIT 4
struct vertex_buffer {
GLfloat Obj[VB_SIZE][4]; /* Object coords */
GLfloat Eye[VB_SIZE][4]; /* Eye coords */
GLfloat Clip[VB_SIZE][4]; /* Clip coords */
GLfloat Win[VB_SIZE][3]; /* Window coords */
GLfloat Normal[VB_SIZE][3]; /* Normal vectors */
GLubyte Fcolor[VB_SIZE][4]; /* Front colors (RGBA) */
GLubyte Bcolor[VB_SIZE][4]; /* Back colors (RGBA) */
GLubyte (*Color)[4]; /* == Fcolor or Bcolor */
GLuint Findex[VB_SIZE]; /* Front color indexes */
GLuint Bindex[VB_SIZE]; /* Back color indexes */
GLuint *Index; /* == Findex or Bindex */
GLboolean Edgeflag[VB_SIZE]; /* Polygon edge flags */
GLfloat TexCoord[VB_SIZE][4];/* Texture coords */
GLubyte ClipMask[VB_SIZE]; /* bitwise-OR of CLIP_* values, below */
GLubyte ClipOrMask; /* bitwise-OR of all ClipMask[] values */
GLubyte ClipAndMask; /* bitwise-AND of all ClipMask[] values */
GLuint Start; /* First vertex to process */
GLuint Count; /* Number of vertexes in buffer */
GLuint Free; /* Next empty position for clipping */
GLuint VertexSizeMask; /* Bitwise-or of VERTEX[234]_BIT */
GLuint TexCoordSize; /* Either 2 or 4 */
GLboolean MonoColor; /* Do all vertices have same color? */
GLboolean MonoNormal; /* Do all vertices have same normal? */
GLboolean MonoMaterial; /* Do all vertices have same material? */
/* to handle glMaterial calls inside glBegin/glEnd: */
GLuint MaterialMask[VB_SIZE]; /* Which material values to change */
struct gl_material Material[VB_SIZE][2]; /* New material values */
};
/* Vertex buffer clipping flags */
#define CLIP_RIGHT_BIT 0x01
#define CLIP_LEFT_BIT 0x02
#define CLIP_TOP_BIT 0x04
#define CLIP_BOTTOM_BIT 0x08
#define CLIP_NEAR_BIT 0x10
#define CLIP_FAR_BIT 0x20
#define CLIP_USER_BIT 0x40
#define CLIP_ALL_BITS 0x3f
#define CLIP_ALL 1
#define CLIP_NONE 2
#define CLIP_SOME 3
extern struct vertex_buffer *gl_alloc_vb(void);
#endif
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