| /* |
| * Mesa 3-D graphics library |
| * Version: 7.3 |
| * |
| * Copyright (C) 1999-2008 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 "main/glheader.h" |
| |
| |
| #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 */ |
| GLbitfield flags; /**< bitmask of VEC_x flags */ |
| void *storage; /**< self-allocated storage */ |
| GLuint storage_count; /**< storage size in elements */ |
| } GLvector4f; |
| |
| |
| extern void _mesa_vector4f_init( GLvector4f *v, GLbitfield flags, |
| GLfloat (*storage)[4] ); |
| extern void _mesa_vector4f_alloc( GLvector4f *v, GLbitfield flags, |
| GLuint count, GLuint alignment ); |
| extern void _mesa_vector4f_free( GLvector4f *v ); |
| extern void _mesa_vector4f_print( const GLvector4f *v, const GLubyte *, GLboolean ); |
| extern void _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint nr, GLuint elt ); |
| |
| |
| /** |
| * 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 |