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  1. /*
  2.  * Mesa 3-D graphics library
  3.  *
  4.  * Copyright (C) 1999-2001  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. #include <stdio.h>
  30.  
  31. #include "main/glheader.h"
  32. #include "main/imports.h"
  33. #include "main/macros.h"
  34.  
  35. #include "m_vector.h"
  36.  
  37.  
  38.  
  39. /**
  40.  * Given a vector [count][4] of floats, set all the [][elt] values
  41.  * to 0 (if elt = 0, 1, 2) or 1.0 (if elt = 3).
  42.  */
  43. void
  44. _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.  
  64. static const GLubyte size_bits[5] = {
  65.    0,
  66.    VEC_SIZE_1,
  67.    VEC_SIZE_2,
  68.    VEC_SIZE_3,
  69.    VEC_SIZE_4,
  70. };
  71.  
  72.  
  73. /**
  74.  * Initialize GLvector objects.
  75.  * \param v  the vector object to initialize.
  76.  * \param flags  bitwise-OR of VEC_* flags
  77.  * \param storage  pointer to storage for the vector's data
  78.  */
  79. void
  80. _mesa_vector4f_init( GLvector4f *v, GLbitfield flags, GLfloat (*storage)[4] )
  81. {
  82.    v->stride = 4 * sizeof(GLfloat);
  83.    v->size = 2;   /* may change: 2-4 for vertices and 1-4 for texcoords */
  84.    v->data = storage;
  85.    v->start = (GLfloat *) storage;
  86.    v->count = 0;
  87.    v->flags = size_bits[4] | flags;
  88. }
  89.  
  90.  
  91. /**
  92.  * Initialize GLvector objects and allocate storage.
  93.  * \param v  the vector object
  94.  * \param flags  bitwise-OR of VEC_* flags
  95.  * \param count  number of elements to allocate in vector
  96.  * \param alignment  desired memory alignment for the data (in bytes)
  97.  */
  98. void
  99. _mesa_vector4f_alloc( GLvector4f *v, GLbitfield flags, GLuint count,
  100.                       GLuint alignment )
  101. {
  102.    v->stride = 4 * sizeof(GLfloat);
  103.    v->size = 2;
  104.    v->storage = _mesa_align_malloc( count * 4 * sizeof(GLfloat), alignment );
  105.    v->storage_count = count;
  106.    v->start = (GLfloat *) v->storage;
  107.    v->data = (GLfloat (*)[4]) v->storage;
  108.    v->count = 0;
  109.    v->flags = size_bits[4] | flags | VEC_MALLOC;
  110. }
  111.  
  112.  
  113. /**
  114.  * Vector deallocation.  Free whatever memory is pointed to by the
  115.  * vector's storage field if the VEC_MALLOC flag is set.
  116.  * DO NOT free the GLvector object itself, though.
  117.  */
  118. void
  119. _mesa_vector4f_free( GLvector4f *v )
  120. {
  121.    if (v->flags & VEC_MALLOC) {
  122.       _mesa_align_free( v->storage );
  123.       v->data = NULL;
  124.       v->start = NULL;
  125.       v->storage = NULL;
  126.       v->flags &= ~VEC_MALLOC;
  127.    }
  128. }
  129.  
  130.  
  131. /**
  132.  * For debugging
  133.  */
  134. void
  135. _mesa_vector4f_print( const GLvector4f *v, const GLubyte *cullmask,
  136.                       GLboolean culling )
  137. {
  138.    static const GLfloat c[4] = { 0, 0, 0, 1 };
  139.    static const char *templates[5] = {
  140.       "%d:\t0, 0, 0, 1\n",
  141.       "%d:\t%f, 0, 0, 1\n",
  142.       "%d:\t%f, %f, 0, 1\n",
  143.       "%d:\t%f, %f, %f, 1\n",
  144.       "%d:\t%f, %f, %f, %f\n"
  145.    };
  146.  
  147.    const char *t = templates[v->size];
  148.    GLfloat *d = (GLfloat *)v->data;
  149.    GLuint j, i = 0, count;
  150.  
  151.    printf("data-start\n");
  152.    for (; d != v->start; STRIDE_F(d, v->stride), i++)
  153.       printf(t, i, d[0], d[1], d[2], d[3]);
  154.  
  155.    printf("start-count(%u)\n", v->count);
  156.    count = i + v->count;
  157.  
  158.    if (culling) {
  159.       for (; i < count; STRIDE_F(d, v->stride), i++)
  160.          if (cullmask[i])
  161.             printf(t, i, d[0], d[1], d[2], d[3]);
  162.    }
  163.    else {
  164.       for (; i < count; STRIDE_F(d, v->stride), i++)
  165.          printf(t, i, d[0], d[1], d[2], d[3]);
  166.    }
  167.  
  168.    for (j = v->size; j < 4; j++) {
  169.       if ((v->flags & (1<<j)) == 0) {
  170.  
  171.          printf("checking col %u is clean as advertised ", j);
  172.  
  173.          for (i = 0, d = (GLfloat *) v->data;
  174.               i < count && d[j] == c[j];
  175.               i++, STRIDE_F(d, v->stride)) {
  176.             /* no-op */
  177.          }
  178.  
  179.          if (i == count)
  180.             printf(" --> ok\n");
  181.          else
  182.             printf(" --> Failed at %u ******\n", i);
  183.       }
  184.    }
  185. }
  186.