1/* 2 * Mesa 3-D graphics library 3 * 4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included 14 * in all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 22 * OTHER DEALINGS IN THE SOFTWARE. 23 */ 24 25/* 26 * New (3.1) transformation code written by Keith Whitwell. 27 */ 28 29 30#ifndef _M_VECTOR_H_ 31#define _M_VECTOR_H_ 32 33#include "main/glheader.h" 34#define MATH_ASM_PTR_SIZE sizeof(void *) 35#include "math/m_vector_asm.h" 36 37#define VEC_MALLOC 0x10 /* storage field points to self-allocated mem*/ 38#define VEC_NOT_WRITEABLE 0x40 /* writable elements to hold clipped data */ 39#define VEC_BAD_STRIDE 0x100 /* matches tnl's prefered stride */ 40 41 42 43 44 45/** 46 * Wrap all the information about vectors up in a struct. Has 47 * additional fields compared to the other vectors to help us track 48 * different vertex sizes, and whether we need to clean columns out 49 * because they contain non-(0,0,0,1) values. 50 * 51 * The start field is used to reserve data for copied vertices at the 52 * end of _mesa_transform_vb, and avoids the need for a multiplication in 53 * the transformation routines. 54 */ 55typedef struct { 56 GLfloat (*data)[4]; /**< may be malloc'd or point to client data */ 57 GLfloat *start; /**< points somewhere inside of GLvector4f::data */ 58 GLuint count; /**< size of the vector (in elements) */ 59 GLuint stride; /**< stride from one element to the next (in bytes) */ 60 GLuint size; /**< 2-4 for vertices and 1-4 for texcoords */ 61 GLbitfield flags; /**< bitmask of VEC_x flags */ 62 void *storage; /**< self-allocated storage */ 63 GLuint storage_count; /**< storage size in elements */ 64} GLvector4f; 65 66 67extern void _mesa_vector4f_init( GLvector4f *v, GLbitfield flags, 68 GLfloat (*storage)[4] ); 69extern void _mesa_vector4f_alloc( GLvector4f *v, GLbitfield flags, 70 GLuint count, GLuint alignment ); 71extern void _mesa_vector4f_free( GLvector4f *v ); 72extern void _mesa_vector4f_print( const GLvector4f *v, const GLubyte *, GLboolean ); 73extern void _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint nr, GLuint elt ); 74 75 76/** 77 * Given vector <v>, return a pointer (cast to <type *> to the <i>-th element. 78 * 79 * End up doing a lot of slow imuls if not careful. 80 */ 81#define VEC_ELT( v, type, i ) \ 82 ( (type *) ( ((GLbyte *) ((v)->data)) + (i) * (v)->stride) ) 83 84 85#endif 86