1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2005 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 * Authors:
25 * Keith Whitwell <keithw@vmware.com>
26 */
27
28 #include "main/errors.h"
29 #include "main/bufferobj.h"
30 #include "math/m_eval.h"
31 #include "main/api_arrayelt.h"
32 #include "main/arrayobj.h"
33 #include "main/varray.h"
34 #include "util/u_memory.h"
35 #include "vbo.h"
36 #include "vbo_private.h"
37
38
39 static GLuint
check_size(const GLfloat * attr)40 check_size(const GLfloat *attr)
41 {
42 if (attr[3] != 1.0F)
43 return 4;
44 if (attr[2] != 0.0F)
45 return 3;
46 if (attr[1] != 0.0F)
47 return 2;
48 return 1;
49 }
50
51
52 /**
53 * Helper for initializing a vertex array.
54 */
55 static void
init_array(struct gl_context * ctx,struct gl_array_attributes * attrib,unsigned size,const void * pointer)56 init_array(struct gl_context *ctx, struct gl_array_attributes *attrib,
57 unsigned size, const void *pointer)
58 {
59 memset(attrib, 0, sizeof(*attrib));
60
61 vbo_set_vertex_format(&attrib->Format, size, GL_FLOAT);
62 attrib->Stride = 0;
63 attrib->Ptr = pointer;
64 }
65
66
67 /**
68 * Set up the vbo->currval arrays to point at the context's current
69 * vertex attributes (with strides = 0).
70 */
71 static void
init_legacy_currval(struct gl_context * ctx)72 init_legacy_currval(struct gl_context *ctx)
73 {
74 struct vbo_context *vbo = vbo_context(ctx);
75
76 /* Set up a constant (Stride == 0) array for each current
77 * attribute:
78 */
79 for (int attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
80 if (VERT_BIT(attr) & VERT_BIT_GENERIC_ALL)
81 continue;
82
83 struct gl_array_attributes *attrib = &vbo->current[attr];
84
85 init_array(ctx, attrib, check_size(ctx->Current.Attrib[attr]),
86 ctx->Current.Attrib[attr]);
87 }
88 }
89
90
91 static void
init_generic_currval(struct gl_context * ctx)92 init_generic_currval(struct gl_context *ctx)
93 {
94 struct vbo_context *vbo = vbo_context(ctx);
95 GLuint i;
96
97 for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
98 const unsigned attr = VBO_ATTRIB_GENERIC0 + i;
99 struct gl_array_attributes *attrib = &vbo->current[attr];
100
101 init_array(ctx, attrib, 1, ctx->Current.Attrib[attr]);
102 }
103 }
104
105
106 static void
init_mat_currval(struct gl_context * ctx)107 init_mat_currval(struct gl_context *ctx)
108 {
109 struct vbo_context *vbo = vbo_context(ctx);
110 GLuint i;
111
112 /* Set up a constant (StrideB == 0) array for each current
113 * attribute:
114 */
115 for (i = 0; i < MAT_ATTRIB_MAX; i++) {
116 const unsigned attr = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
117 struct gl_array_attributes *attrib = &vbo->current[attr];
118 unsigned size;
119
120 /* Size is fixed for the material attributes, for others will
121 * be determined at runtime:
122 */
123 switch (i) {
124 case MAT_ATTRIB_FRONT_SHININESS:
125 case MAT_ATTRIB_BACK_SHININESS:
126 size = 1;
127 break;
128 case MAT_ATTRIB_FRONT_INDEXES:
129 case MAT_ATTRIB_BACK_INDEXES:
130 size = 3;
131 break;
132 default:
133 size = 4;
134 break;
135 }
136
137 init_array(ctx, attrib, size, ctx->Light.Material.Attrib[i]);
138 }
139 }
140
141
142 void
vbo_exec_update_eval_maps(struct gl_context * ctx)143 vbo_exec_update_eval_maps(struct gl_context *ctx)
144 {
145 struct vbo_context *vbo = vbo_context(ctx);
146
147 vbo->exec.eval.recalculate_maps = GL_TRUE;
148 }
149
150
151 GLboolean
_vbo_CreateContext(struct gl_context * ctx)152 _vbo_CreateContext(struct gl_context *ctx)
153 {
154 struct vbo_context *vbo = &ctx->vbo_context;
155
156 memset(vbo, 0, sizeof(*vbo));
157
158 init_legacy_currval(ctx);
159 init_generic_currval(ctx);
160 init_mat_currval(ctx);
161
162 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
163 STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
164
165 /* Hook our functions into exec and compile dispatch tables. These
166 * will pretty much be permanently installed, which means that the
167 * vtxfmt mechanism can be removed now.
168 */
169 vbo_exec_init(ctx);
170 if (ctx->API == API_OPENGL_COMPAT)
171 vbo_save_init(ctx);
172
173 vbo->VAO = _mesa_new_vao(ctx, ~((GLuint)0));
174 /* The exec VAO assumes to have all arributes bound to binding 0 */
175 for (unsigned i = 0; i < VERT_ATTRIB_MAX; ++i)
176 _mesa_vertex_attrib_binding(ctx, vbo->VAO, i, 0);
177
178 _math_init_eval();
179
180 return GL_TRUE;
181 }
182
183
184 void
_vbo_DestroyContext(struct gl_context * ctx)185 _vbo_DestroyContext(struct gl_context *ctx)
186 {
187 struct vbo_context *vbo = vbo_context(ctx);
188
189 if (vbo) {
190 vbo_exec_destroy(ctx);
191 if (ctx->API == API_OPENGL_COMPAT)
192 vbo_save_destroy(ctx);
193 _mesa_reference_vao(ctx, &vbo->VAO, NULL);
194 }
195 }
196
197
198 const struct gl_array_attributes *
_vbo_current_attrib(const struct gl_context * ctx,gl_vert_attrib attr)199 _vbo_current_attrib(const struct gl_context *ctx, gl_vert_attrib attr)
200 {
201 const struct vbo_context *vbo = vbo_context_const(ctx);
202 const gl_vertex_processing_mode vmp = ctx->VertexProgram._VPMode;
203 return &vbo->current[_vbo_attribute_alias_map[vmp][attr]];
204 }
205