home *** CD-ROM | disk | FTP | other *** search
- /* $Id: m_vector.h,v 1.6 2001/03/12 00:48:41 gareth Exp $ */
-
- /*
- * Mesa 3-D graphics library
- * Version: 3.5
- *
- * Copyright (C) 1999-2001 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.
- */
-
- /*
- * New (3.1) transformation code written by Keith Whitwell.
- */
-
-
- #ifndef _M_VECTOR_H_
- #define _M_VECTOR_H_
-
- #include "glheader.h"
- #include "mtypes.h" /* hack for GLchan */
-
-
- #define VEC_DIRTY_0 0x1
- #define VEC_DIRTY_1 0x2
- #define VEC_DIRTY_2 0x4
- #define VEC_DIRTY_3 0x8
- #define VEC_MALLOC 0x10 /* storage field points to self-allocated mem*/
- #define VEC_NOT_WRITEABLE 0x40 /* writable elements to hold clipped data */
- #define VEC_BAD_STRIDE 0x100 /* matches tnl's prefered stride */
-
-
- #define VEC_SIZE_1 VEC_DIRTY_0
- #define VEC_SIZE_2 (VEC_DIRTY_0|VEC_DIRTY_1)
- #define VEC_SIZE_3 (VEC_DIRTY_0|VEC_DIRTY_1|VEC_DIRTY_2)
- #define VEC_SIZE_4 (VEC_DIRTY_0|VEC_DIRTY_1|VEC_DIRTY_2|VEC_DIRTY_3)
-
-
-
- /* Wrap all the information about vectors up in a struct. Has
- * additional fields compared to the other vectors to help us track of
- * different vertex sizes, and whether we need to clean columns out
- * because they contain non-(0,0,0,1) values.
- *
- * The start field is used to reserve data for copied vertices at the
- * end of _mesa_transform_vb, and avoids the need for a multiplication in
- * the transformation routines.
- */
- typedef struct {
- GLfloat (*data)[4]; /* may be malloc'd or point to client data */
- GLfloat *start; /* points somewhere inside of <data> */
- GLuint count; /* size of the vector (in elements) */
- GLuint stride; /* stride from one element to the next (in bytes) */
- GLuint size; /* 2-4 for vertices and 1-4 for texcoords */
- GLuint flags; /* which columns are dirty */
- void *storage; /* self-allocated storage */
- } GLvector4f;
-
-
- extern void _mesa_vector4f_init( GLvector4f *v, GLuint flags,
- GLfloat (*storage)[4] );
- extern void _mesa_vector4f_alloc( GLvector4f *v, GLuint flags,
- GLuint count, GLuint alignment );
- extern void _mesa_vector4f_free( GLvector4f *v );
- extern void _mesa_vector4f_print( GLvector4f *v, GLubyte *, GLboolean );
- extern void _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint nr, GLuint elt );
-
-
- /* Could use a single vector type for normals and vertices, but
- * this way avoids some casts.
- */
- typedef struct {
- GLfloat (*data)[3];
- GLfloat *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector3f;
-
- extern void _mesa_vector3f_init( GLvector3f *v, GLuint flags, GLfloat (*)[3] );
- extern void _mesa_vector3f_alloc( GLvector3f *v, GLuint flags, GLuint count,
- GLuint alignment );
- extern void _mesa_vector3f_free( GLvector3f *v );
- extern void _mesa_vector3f_print( GLvector3f *v, GLubyte *, GLboolean );
-
-
- typedef struct {
- GLfloat *data;
- GLfloat *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector1f;
-
- extern void _mesa_vector1f_free( GLvector1f *v );
- extern void _mesa_vector1f_init( GLvector1f *v, GLuint flags, GLfloat * );
- extern void _mesa_vector1f_alloc( GLvector1f *v, GLuint flags, GLuint count,
- GLuint alignment );
-
-
- /* For 4ub rgba values.
- */
- typedef struct {
- GLubyte (*data)[4];
- GLubyte *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector4ub;
-
- extern void _mesa_vector4ub_init( GLvector4ub *v, GLuint flags,
- GLubyte (*storage)[4] );
- extern void _mesa_vector4ub_alloc( GLvector4ub *v, GLuint flags, GLuint count,
- GLuint alignment );
- extern void _mesa_vector4ub_free( GLvector4ub * );
-
-
- /* For 4 * GLchan values.
- */
- typedef struct {
- GLchan (*data)[4];
- GLchan *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector4chan;
-
- extern void _mesa_vector4chan_init( GLvector4chan *v, GLuint flags,
- GLchan (*storage)[4] );
- extern void _mesa_vector4chan_alloc( GLvector4chan *v, GLuint flags, GLuint count,
- GLuint alignment );
- extern void _mesa_vector4chan_free( GLvector4chan * );
-
-
-
-
- /* For 4 * GLushort rgba values.
- */
- typedef struct {
- GLushort (*data)[4];
- GLushort *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector4us;
-
- extern void _mesa_vector4us_init( GLvector4us *v, GLuint flags,
- GLushort (*storage)[4] );
- extern void _mesa_vector4us_alloc( GLvector4us *v, GLuint flags, GLuint count,
- GLuint alignment );
- extern void _mesa_vector4us_free( GLvector4us * );
-
-
-
-
- /* For 1ub values, eg edgeflag.
- */
- typedef struct {
- GLubyte *data;
- GLubyte *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector1ub;
-
- extern void _mesa_vector1ub_init( GLvector1ub *v, GLuint flags, GLubyte *storage);
- extern void _mesa_vector1ub_alloc( GLvector1ub *v, GLuint flags, GLuint count,
- GLuint alignment );
- extern void _mesa_vector1ub_free( GLvector1ub * );
-
-
-
-
- /* For, eg Index, Array element.
- */
- typedef struct {
- GLuint *data;
- GLuint *start;
- GLuint count;
- GLuint stride;
- GLuint flags;
- void *storage;
- } GLvector1ui;
-
- extern void _mesa_vector1ui_init( GLvector1ui *v, GLuint flags, GLuint *storage );
- extern void _mesa_vector1ui_alloc( GLvector1ui *v, GLuint flags, GLuint count,
- GLuint alignment );
- extern void _mesa_vector1ui_free( GLvector1ui * );
-
-
-
- /*
- * Given vector <v>, return a pointer (cast to <type *> to the <i>-th element.
- *
- * End up doing a lot of slow imuls if not careful.
- */
- #define VEC_ELT( v, type, i ) \
- ( (type *) ( ((GLbyte *) ((v)->data)) + (i) * (v)->stride) )
-
-
- #endif
-