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/vtxfmt.h"
32 #include "main/api_arrayelt.h"
33 #include "main/arrayobj.h"
34 #include "main/varray.h"
35 #include "util/u_memory.h"
36 #include "vbo.h"
37 #include "vbo_private.h"
38
39
40 static GLuint
check_size(const GLfloat * attr)41 check_size(const GLfloat *attr)
42 {
43 if (attr[3] != 1.0F)
44 return 4;
45 if (attr[2] != 0.0F)
46 return 3;
47 if (attr[1] != 0.0F)
48 return 2;
49 return 1;
50 }
51
52
53 /**
54 * Helper for initializing a vertex array.
55 */
56 static void
init_array(struct gl_context * ctx,struct gl_array_attributes * attrib,unsigned size,const void * pointer)57 init_array(struct gl_context *ctx, struct gl_array_attributes *attrib,
58 unsigned size, const void *pointer)
59 {
60 memset(attrib, 0, sizeof(*attrib));
61
62 vbo_set_vertex_format(&attrib->Format, size, GL_FLOAT);
63 attrib->Stride = 0;
64 attrib->Ptr = pointer;
65 }
66
67
68 /**
69 * Set up the vbo->currval arrays to point at the context's current
70 * vertex attributes (with strides = 0).
71 */
72 static void
init_legacy_currval(struct gl_context * ctx)73 init_legacy_currval(struct gl_context *ctx)
74 {
75 struct vbo_context *vbo = vbo_context(ctx);
76 GLuint i;
77
78 /* Set up a constant (Stride == 0) array for each current
79 * attribute:
80 */
81 for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
82 const unsigned attr = VERT_ATTRIB_FF(i);
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_install_exec_vtxfmt(struct gl_context * ctx)143 _vbo_install_exec_vtxfmt(struct gl_context *ctx)
144 {
145 struct vbo_context *vbo = vbo_context(ctx);
146
147 _mesa_install_exec_vtxfmt(ctx, &vbo->exec.vtxfmt);
148 }
149
150
151 void
vbo_exec_update_eval_maps(struct gl_context * ctx)152 vbo_exec_update_eval_maps(struct gl_context *ctx)
153 {
154 struct vbo_context *vbo = vbo_context(ctx);
155
156 vbo->exec.eval.recalculate_maps = GL_TRUE;
157 }
158
159
160 GLboolean
_vbo_CreateContext(struct gl_context * ctx,bool use_buffer_objects)161 _vbo_CreateContext(struct gl_context *ctx, bool use_buffer_objects)
162 {
163 struct vbo_context *vbo = &ctx->vbo_context;
164
165 memset(vbo, 0, sizeof(*vbo));
166
167 vbo->binding.Offset = 0;
168 vbo->binding.Stride = 0;
169 vbo->binding.InstanceDivisor = 0;
170
171 init_legacy_currval(ctx);
172 init_generic_currval(ctx);
173 init_mat_currval(ctx);
174
175 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
176 STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
177
178 /* Hook our functions into exec and compile dispatch tables. These
179 * will pretty much be permanently installed, which means that the
180 * vtxfmt mechanism can be removed now.
181 */
182 vbo_exec_init(ctx, use_buffer_objects);
183 if (ctx->API == API_OPENGL_COMPAT)
184 vbo_save_init(ctx);
185
186 vbo->VAO = _mesa_new_vao(ctx, ~((GLuint)0));
187 /* The exec VAO assumes to have all arributes bound to binding 0 */
188 for (unsigned i = 0; i < VERT_ATTRIB_MAX; ++i)
189 _mesa_vertex_attrib_binding(ctx, vbo->VAO, i, 0);
190
191 _math_init_eval();
192
193 return GL_TRUE;
194 }
195
196
197 void
_vbo_DestroyContext(struct gl_context * ctx)198 _vbo_DestroyContext(struct gl_context *ctx)
199 {
200 struct vbo_context *vbo = vbo_context(ctx);
201
202 if (vbo) {
203 _mesa_reference_buffer_object(ctx, &vbo->binding.BufferObj, NULL);
204
205 vbo_exec_destroy(ctx);
206 if (ctx->API == API_OPENGL_COMPAT)
207 vbo_save_destroy(ctx);
208 _mesa_reference_vao(ctx, &vbo->VAO, NULL);
209 }
210 }
211
212
213 const struct gl_array_attributes *
_vbo_current_attrib(const struct gl_context * ctx,gl_vert_attrib attr)214 _vbo_current_attrib(const struct gl_context *ctx, gl_vert_attrib attr)
215 {
216 const struct vbo_context *vbo = vbo_context_const(ctx);
217 const gl_vertex_processing_mode vmp = ctx->VertexProgram._VPMode;
218 return &vbo->current[_vbo_attribute_alias_map[vmp][attr]];
219 }
220
221
222 const struct gl_vertex_buffer_binding *
_vbo_current_binding(const struct gl_context * ctx)223 _vbo_current_binding(const struct gl_context *ctx)
224 {
225 const struct vbo_context *vbo = vbo_context_const(ctx);
226 return &vbo->binding;
227 }
228