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 #include <stddef.h>
31
32 #include "main/glheader.h"
33 #include "main/macros.h"
34
35 #include "m_vector.h"
36
37 #include "util/u_memory.h"
38
39
40
41 /**
42 * Given a vector [count][4] of floats, set all the [][elt] values
43 * to 0 (if elt = 0, 1, 2) or 1.0 (if elt = 3).
44 */
45 void
_mesa_vector4f_clean_elem(GLvector4f * vec,GLuint count,GLuint elt)46 _mesa_vector4f_clean_elem( GLvector4f *vec, GLuint count, GLuint elt )
47 {
48 static const GLubyte elem_bits[4] = {
49 VEC_DIRTY_0,
50 VEC_DIRTY_1,
51 VEC_DIRTY_2,
52 VEC_DIRTY_3
53 };
54 static const GLfloat clean[4] = { 0, 0, 0, 1 };
55 const GLfloat v = clean[elt];
56 GLfloat (*data)[4] = (GLfloat (*)[4])vec->start;
57 GLuint i;
58
59 for (i = 0; i < count; i++)
60 data[i][elt] = v;
61
62 vec->flags &= ~elem_bits[elt];
63 }
64
65
66 static const GLubyte size_bits[5] = {
67 0,
68 VEC_SIZE_1,
69 VEC_SIZE_2,
70 VEC_SIZE_3,
71 VEC_SIZE_4,
72 };
73
74
75 /**
76 * Initialize GLvector objects.
77 * \param v the vector object to initialize.
78 * \param flags bitwise-OR of VEC_* flags
79 * \param storage pointer to storage for the vector's data
80 */
81 void
_mesa_vector4f_init(GLvector4f * v,GLbitfield flags,GLfloat (* storage)[4])82 _mesa_vector4f_init( GLvector4f *v, GLbitfield flags, GLfloat (*storage)[4] )
83 {
84 STATIC_ASSERT(V4F_DATA == offsetof(GLvector4f, data));
85 STATIC_ASSERT(V4F_START == offsetof(GLvector4f, start));
86 STATIC_ASSERT(V4F_COUNT == offsetof(GLvector4f, count));
87 STATIC_ASSERT(V4F_STRIDE == offsetof(GLvector4f, stride));
88 STATIC_ASSERT(V4F_SIZE == offsetof(GLvector4f, size));
89 STATIC_ASSERT(V4F_FLAGS == offsetof(GLvector4f, flags));
90
91 v->stride = 4 * sizeof(GLfloat);
92 v->size = 2; /* may change: 2-4 for vertices and 1-4 for texcoords */
93 v->data = storage;
94 v->start = (GLfloat *) storage;
95 v->count = 0;
96 v->flags = size_bits[4] | flags;
97 }
98
99
100 /**
101 * Initialize GLvector objects and allocate storage.
102 * \param v the vector object
103 * \param flags bitwise-OR of VEC_* flags
104 * \param count number of elements to allocate in vector
105 * \param alignment desired memory alignment for the data (in bytes)
106 */
107 void
_mesa_vector4f_alloc(GLvector4f * v,GLbitfield flags,GLuint count,GLuint alignment)108 _mesa_vector4f_alloc( GLvector4f *v, GLbitfield flags, GLuint count,
109 GLuint alignment )
110 {
111 v->stride = 4 * sizeof(GLfloat);
112 v->size = 2;
113 v->storage = align_malloc( count * 4 * sizeof(GLfloat), alignment );
114 v->storage_count = count;
115 v->start = (GLfloat *) v->storage;
116 v->data = (GLfloat (*)[4]) v->storage;
117 v->count = 0;
118 v->flags = size_bits[4] | flags | VEC_MALLOC;
119 }
120
121
122 /**
123 * Vector deallocation. Free whatever memory is pointed to by the
124 * vector's storage field if the VEC_MALLOC flag is set.
125 * DO NOT free the GLvector object itself, though.
126 */
127 void
_mesa_vector4f_free(GLvector4f * v)128 _mesa_vector4f_free( GLvector4f *v )
129 {
130 if (v->flags & VEC_MALLOC) {
131 align_free( v->storage );
132 v->data = NULL;
133 v->start = NULL;
134 v->storage = NULL;
135 v->flags &= ~VEC_MALLOC;
136 }
137 }
138
139
140 /**
141 * For debugging
142 */
143 void
_mesa_vector4f_print(const GLvector4f * v,const GLubyte * cullmask,GLboolean culling)144 _mesa_vector4f_print( const GLvector4f *v, const GLubyte *cullmask,
145 GLboolean culling )
146 {
147 static const GLfloat c[4] = { 0, 0, 0, 1 };
148 static const char *templates[5] = {
149 "%d:\t0, 0, 0, 1\n",
150 "%d:\t%f, 0, 0, 1\n",
151 "%d:\t%f, %f, 0, 1\n",
152 "%d:\t%f, %f, %f, 1\n",
153 "%d:\t%f, %f, %f, %f\n"
154 };
155
156 const char *t = templates[v->size];
157 GLfloat *d = (GLfloat *)v->data;
158 GLuint j, i = 0, count;
159
160 printf("data-start\n");
161 for (; d != v->start; STRIDE_F(d, v->stride), i++)
162 printf(t, i, d[0], d[1], d[2], d[3]);
163
164 printf("start-count(%u)\n", v->count);
165 count = i + v->count;
166
167 if (culling) {
168 for (; i < count; STRIDE_F(d, v->stride), i++)
169 if (cullmask[i])
170 printf(t, i, d[0], d[1], d[2], d[3]);
171 }
172 else {
173 for (; i < count; STRIDE_F(d, v->stride), i++)
174 printf(t, i, d[0], d[1], d[2], d[3]);
175 }
176
177 for (j = v->size; j < 4; j++) {
178 if ((v->flags & (1<<j)) == 0) {
179
180 printf("checking col %u is clean as advertised ", j);
181
182 for (i = 0, d = (GLfloat *) v->data;
183 i < count && d[j] == c[j];
184 i++, STRIDE_F(d, v->stride)) {
185 /* no-op */
186 }
187
188 if (i == count)
189 printf(" --> ok\n");
190 else
191 printf(" --> Failed at %u ******\n", i);
192 }
193 }
194 }
195