0,0 → 1,92 |
/* |
* 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. |
*/ |
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/* |
* New (3.1) transformation code written by Keith Whitwell. |
*/ |
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#ifndef _M_VECTOR_H_ |
#define _M_VECTOR_H_ |
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#include "main/glheader.h" |
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#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 */ |
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#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) |
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/** |
* 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; |
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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 ); |
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/** |
* 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) ) |
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#endif |