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/* Id: vb.h,v 1.2 1999/02/26 08:52:39 martin 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.
*/
/*
* Log: vb.h,v $
* Revision 1.2 1999/02/26 08:52:39 martin
* Updated Mesa to the official version checked into the Mesa cvs archive
* Cleaned up the XMesa interface
* Fixed support for standalone Mesa
* Removed several unused files in the lib/GL/mesa/src subdirectory
* Moved glcore.h back to include/GL/internal/glcore.h
*
* Revision 3.8 1999/02/14 03:46:34 brianp
* new copyright
*
* Revision 3.7 1998/10/31 17:06:15 brianp
* variety of multi-texture changes
*
* Revision 3.6 1998/10/29 03:57:11 brianp
* misc clean-up of new vertex transformation code
*
* Revision 3.5 1998/10/29 02:28:13 brianp
* incorporated Keith Whitwell's transformation optimizations
*
* Revision 3.4 1998/06/22 03:16:00 brianp
* moved VB_MAX definition to config.h
*
* Revision 3.3 1998/06/21 02:02:23 brianp
* added another comment
*
* Revision 3.2 1998/02/20 04:53:07 brianp
* implemented GL_SGIS_multitexture
*
* Revision 3.1 1998/02/02 03:09:34 brianp
* added GL_LIGHT_MODEL_COLOR_CONTROL (separate specular color interpolation)
*
* Revision 3.0 1998/01/31 21:06:45 brianp
* initial rev
*
*/
/*
* 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
*
* When we're outside of a glBegin/glEnd pair the information in this
* structure is irrelevant.
*/
#ifndef VB_H
#define VB_H
#include "types.h"
/*
* Actual vertex buffer size.
* 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
#define VERTEX_SZ_BIT(n) (1<<((n)-2))
struct vertex_buffer {
const GLfloat *ObjPtr; /* Pointer to source of Object-space coords */
GLuint ObjCoordSize; /* Coordinate size: 2, 3, or 4 */
GLuint ObjStride; /* Stride between coordinates (in floats) */
const GLfloat *NormalPtr; /* Pointer to source of vertex normals */
GLuint NormalStride; /* Stride between normals (in floats) */
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 */
GLubyte Fspec[VB_SIZE][4]; /* Front specular color (RGBA) */
GLubyte Bspec[VB_SIZE][4]; /* Back specular color (RGBA) */
GLubyte (*Specular)[4]; /* == Fspec or Bspec */
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)[4]; /* Points to one of the MultiTexCoord sets */
GLfloat MultiTexCoord[MAX_TEXTURE_UNITS][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? */
/* to handle glMaterial calls inside glBegin/glEnd: */
GLuint MaterialMask[VB_SIZE]; /* Which material values to change */
GLuint NextMaterial[VB_SIZE]; /* Till when does it hold? */
GLuint LastMaterial; /* Scratch. */
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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