reactos/lib/mesa32/src/math/m_vector.c

   1
   2 /*
   3  * Mesa 3-D graphics library
   4  * Version:  3.5
   5  *
   6  * Copyright (C) 1999-2001  Brian Paul   All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 /*
  27  * New (3.1) transformation code written by Keith Whitwell.
  28  */
  29
  30
  31 #include "glheader.h"
  32 #include "imports.h"
  33 #include "macros.h"
  34 #include "imports.h"
  35
  36 #include "m_vector.h"
  37
  38
  39
  40 /*
  41  * Given a vector [count][4] of floats, set all the [][elt] values
  42  * to 0 (if elt = 0, 1, 2) or 1.0 (if elt = 3).
  43  */
  44 void _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint count, GLuint elt )
  45 {
  46    static const GLubyte elem_bits[4] = {
  47       VEC_DIRTY_0,
  48       VEC_DIRTY_1,
  49       VEC_DIRTY_2,
  50       VEC_DIRTY_3
  51    };
  52    static const GLfloat clean[4] = { 0, 0, 0, 1 };
  53    const GLfloat v = clean[elt];
  54    GLfloat (*data)[4] = (GLfloat (*)[4])vec->start;
  55    GLuint i;
  56
  57    for (i = 0 ; i < count ; i++)
  58       data[i][elt] = v;
  59
  60    vec->flags &= ~elem_bits[elt];
  61 }
  62
  63 static const GLubyte size_bits[5] = {
  64    0,
  65    VEC_SIZE_1,
  66    VEC_SIZE_2,
  67    VEC_SIZE_3,
  68    VEC_SIZE_4,
  69 };
  70
  71
  72
  73 /*
  74  * Initialize GLvector objects.
  75  * Input: v - the vector object to initialize.
  76  *        flags - bitwise-OR of VEC_* flags
  77  *        storage - pointer to storage for the vector's data
  78  */
  79
  80
  81 void _mesa_vector4f_init( GLvector4f *v, GLuint flags, GLfloat (*storage)[4] )
  82 {
  83    v->stride = 4 * sizeof(GLfloat);
  84    v->size = 2;   /* may change: 2-4 for vertices and 1-4 for texcoords */
  85    v->data = storage;
  86    v->start = (GLfloat *) storage;
  87    v->count = 0;
  88    v->flags = size_bits[4] | flags ;
  89 }
  90
  91
  92
  93
  94 /*
  95  * Initialize GLvector objects and allocate storage.
  96  * Input: v - the vector object
  97  *        sz - unused????
  98  *        flags - bitwise-OR of VEC_* flags
  99  *        count - number of elements to allocate in vector
 100  *        alignment - desired memory alignment for the data (in bytes)
 101  */
 102
 103
 104 void _mesa_vector4f_alloc( GLvector4f *v, GLuint flags, GLuint count,
 105                         GLuint alignment )
 106 {
 107    v->stride = 4 * sizeof(GLfloat);
 108    v->size = 2;
 109    v->storage = ALIGN_MALLOC( count * 4 * sizeof(GLfloat), alignment );
 110    v->start = (GLfloat *) v->storage;
 111    v->data = (GLfloat (*)[4]) v->storage;
 112    v->count = 0;
 113    v->flags = size_bits[4] | flags | VEC_MALLOC ;
 114 }
 115
 116
 117
 118
 119 /*
 120  * Vector deallocation.  Free whatever memory is pointed to by the
 121  * vector's storage field if the VEC_MALLOC flag is set.
 122  * DO NOT free the GLvector object itself, though.
 123  */
 124
 125
 126 void _mesa_vector4f_free( GLvector4f *v )
 127 {
 128    if (v->flags & VEC_MALLOC) {
 129       ALIGN_FREE( v->storage );
 130       v->data = NULL;
 131       v->start = NULL;
 132       v->storage = NULL;
 133       v->flags &= ~VEC_MALLOC;
 134    }
 135 }
 136
 137
 138 /*
 139  * For debugging
 140  */
 141 void _mesa_vector4f_print( GLvector4f *v, GLubyte *cullmask, GLboolean culling )
 142 {
 143    GLfloat c[4] = { 0, 0, 0, 1 };
 144    const char *templates[5] = {
 145       "%d:\t0, 0, 0, 1\n",
 146       "%d:\t%f, 0, 0, 1\n",
 147       "%d:\t%f, %f, 0, 1\n",
 148       "%d:\t%f, %f, %f, 1\n",
 149       "%d:\t%f, %f, %f, %f\n"
 150    };
 151
 152    const char *t = templates[v->size];
 153    GLfloat *d = (GLfloat *)v->data;
 154    GLuint j, i = 0, count;
 155
 156    _mesa_printf("data-start\n");
 157    for ( ; d != v->start ; STRIDE_F(d, v->stride), i++)
 158       _mesa_printf(t, i, d[0], d[1], d[2], d[3]);
 159
 160    _mesa_printf("start-count(%u)\n", v->count);
 161    count = i + v->count;
 162
 163    if (culling) {
 164       for ( ; i < count ; STRIDE_F(d, v->stride), i++)
 165          if (cullmask[i])
 166             _mesa_printf(t, i, d[0], d[1], d[2], d[3]);
 167    }
 168    else {
 169       for ( ; i < count ; STRIDE_F(d, v->stride), i++)
 170          _mesa_printf(t, i, d[0], d[1], d[2], d[3]);
 171    }
 172
 173    for (j = v->size ; j < 4; j++) {
 174       if ((v->flags & (1<<j)) == 0) {
 175
 176          _mesa_printf("checking col %u is clean as advertised ", j);
 177
 178          for (i = 0, d = (GLfloat *) v->data ;
 179               i < count && d[j] == c[j] ;
 180               i++, STRIDE_F(d, v->stride)) {};
 181
 182          if (i == count)
 183             _mesa_printf(" --> ok\n");
 184          else
 185             _mesa_printf(" --> Failed at %u ******\n", i);
 186       }
 187    }
 188 }
 189
 190