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