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/mtypes.h"
29 #include "main/bufferobj.h"
30 #include "math/m_eval.h"
31 #include "vbo.h"
32 #include "vbo_context.h"
33
34
35 static GLuint
check_size(const GLfloat * attr)36 check_size(const GLfloat *attr)
37 {
38 if (attr[3] != 1.0F)
39 return 4;
40 if (attr[2] != 0.0F)
41 return 3;
42 if (attr[1] != 0.0F)
43 return 2;
44 return 1;
45 }
46
47
48 /**
49 * Helper for initializing a vertex array.
50 */
51 static void
init_array(struct gl_context * ctx,struct gl_vertex_array * cl,unsigned size,const void * pointer)52 init_array(struct gl_context *ctx, struct gl_vertex_array *cl,
53 unsigned size, const void *pointer)
54 {
55 memset(cl, 0, sizeof(*cl));
56
57 cl->Size = size;
58 cl->Type = GL_FLOAT;
59 cl->Format = GL_RGBA;
60 cl->StrideB = 0;
61 cl->_ElementSize = cl->Size * sizeof(GLfloat);
62 cl->Ptr = pointer;
63
64 _mesa_reference_buffer_object(ctx, &cl->BufferObj,
65 ctx->Shared->NullBufferObj);
66 }
67
68
69 /**
70 * Set up the vbo->currval arrays to point at the context's current
71 * vertex attributes (with strides = 0).
72 */
73 static void
init_legacy_currval(struct gl_context * ctx)74 init_legacy_currval(struct gl_context *ctx)
75 {
76 struct vbo_context *vbo = vbo_context(ctx);
77 GLuint i;
78
79 /* Set up a constant (StrideB == 0) array for each current
80 * attribute:
81 */
82 for (i = 0; i < VERT_ATTRIB_FF_MAX; i++) {
83 struct gl_vertex_array *cl = &vbo->currval[VERT_ATTRIB_FF(i)];
84
85 init_array(ctx, cl,
86 check_size(ctx->Current.Attrib[i]),
87 ctx->Current.Attrib[i]);
88 }
89 }
90
91
92 static void
init_generic_currval(struct gl_context * ctx)93 init_generic_currval(struct gl_context *ctx)
94 {
95 struct vbo_context *vbo = vbo_context(ctx);
96 GLuint i;
97
98 for (i = 0; i < VERT_ATTRIB_GENERIC_MAX; i++) {
99 struct gl_vertex_array *cl = &vbo->currval[VBO_ATTRIB_GENERIC0 + i];
100
101 init_array(ctx, cl, 1, ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + i]);
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 struct gl_vertex_array *cl =
117 &vbo->currval[VBO_ATTRIB_MAT_FRONT_AMBIENT + i];
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, cl, size, ctx->Light.Material.Attrib[i]);
138 }
139 }
140
141 static void
vbo_draw_indirect_prims(struct gl_context * ctx,GLuint mode,struct gl_buffer_object * indirect_data,GLsizeiptr indirect_offset,unsigned draw_count,unsigned stride,struct gl_buffer_object * indirect_params,GLsizeiptr indirect_params_offset,const struct _mesa_index_buffer * ib)142 vbo_draw_indirect_prims(struct gl_context *ctx,
143 GLuint mode,
144 struct gl_buffer_object *indirect_data,
145 GLsizeiptr indirect_offset,
146 unsigned draw_count,
147 unsigned stride,
148 struct gl_buffer_object *indirect_params,
149 GLsizeiptr indirect_params_offset,
150 const struct _mesa_index_buffer *ib)
151 {
152 struct vbo_context *vbo = vbo_context(ctx);
153 struct _mesa_prim *prim;
154 GLsizei i;
155
156 prim = calloc(draw_count, sizeof(*prim));
157 if (prim == NULL) {
158 _mesa_error(ctx, GL_OUT_OF_MEMORY, "gl%sDraw%sIndirect%s",
159 (draw_count > 1) ? "Multi" : "",
160 ib ? "Elements" : "Arrays",
161 indirect_params ? "CountARB" : "");
162 return;
163 }
164
165 prim[0].begin = 1;
166 prim[draw_count - 1].end = 1;
167 for (i = 0; i < draw_count; ++i, indirect_offset += stride) {
168 prim[i].mode = mode;
169 prim[i].indexed = !!ib;
170 prim[i].indirect_offset = indirect_offset;
171 prim[i].is_indirect = 1;
172 prim[i].draw_id = i;
173 }
174
175 vbo->draw_prims(ctx, prim, draw_count,
176 ib, false, 0, ~0,
177 NULL, 0,
178 ctx->DrawIndirectBuffer);
179
180 free(prim);
181 }
182
183
184 GLboolean
_vbo_CreateContext(struct gl_context * ctx)185 _vbo_CreateContext(struct gl_context *ctx)
186 {
187 struct vbo_context *vbo = CALLOC_STRUCT(vbo_context);
188
189 ctx->vbo_context = vbo;
190
191 /* Initialize the arrayelt helper
192 */
193 if (!ctx->aelt_context &&
194 !_ae_create_context(ctx)) {
195 return GL_FALSE;
196 }
197
198 init_legacy_currval(ctx);
199 init_generic_currval(ctx);
200 init_mat_currval(ctx);
201 vbo_set_indirect_draw_func(ctx, vbo_draw_indirect_prims);
202
203 /* Build mappings from VERT_ATTRIB -> VBO_ATTRIB depending on type
204 * of vertex program active.
205 */
206 {
207 GLuint i;
208
209 /* make sure all VBO_ATTRIB_ values can fit in an unsigned byte */
210 STATIC_ASSERT(VBO_ATTRIB_MAX <= 255);
211
212 /* identity mapping */
213 for (i = 0; i < ARRAY_SIZE(vbo->map_vp_none); i++)
214 vbo->map_vp_none[i] = i;
215 /* map material attribs to generic slots */
216 for (i = 0; i < MAT_ATTRIB_MAX; i++)
217 vbo->map_vp_none[VERT_ATTRIB_GENERIC(i)]
218 = VBO_ATTRIB_MAT_FRONT_AMBIENT + i;
219
220 for (i = 0; i < ARRAY_SIZE(vbo->map_vp_arb); i++)
221 vbo->map_vp_arb[i] = i;
222 }
223
224
225 /* Hook our functions into exec and compile dispatch tables. These
226 * will pretty much be permanently installed, which means that the
227 * vtxfmt mechanism can be removed now.
228 */
229 vbo_exec_init(ctx);
230 if (ctx->API == API_OPENGL_COMPAT)
231 vbo_save_init(ctx);
232
233 _math_init_eval();
234
235 return GL_TRUE;
236 }
237
238
239 void
_vbo_DestroyContext(struct gl_context * ctx)240 _vbo_DestroyContext(struct gl_context *ctx)
241 {
242 struct vbo_context *vbo = vbo_context(ctx);
243
244 if (ctx->aelt_context) {
245 _ae_destroy_context(ctx);
246 ctx->aelt_context = NULL;
247 }
248
249 if (vbo) {
250 GLuint i;
251
252 for (i = 0; i < VBO_ATTRIB_MAX; i++) {
253 _mesa_reference_buffer_object(ctx, &vbo->currval[i].BufferObj, NULL);
254 }
255
256 vbo_exec_destroy(ctx);
257 if (ctx->API == API_OPENGL_COMPAT)
258 vbo_save_destroy(ctx);
259 free(vbo);
260 ctx->vbo_context = NULL;
261 }
262 }
263
264
265 void
vbo_set_draw_func(struct gl_context * ctx,vbo_draw_func func)266 vbo_set_draw_func(struct gl_context *ctx, vbo_draw_func func)
267 {
268 struct vbo_context *vbo = vbo_context(ctx);
269 vbo->draw_prims = func;
270 }
271
272
273 void
vbo_set_indirect_draw_func(struct gl_context * ctx,vbo_indirect_draw_func func)274 vbo_set_indirect_draw_func(struct gl_context *ctx,
275 vbo_indirect_draw_func func)
276 {
277 struct vbo_context *vbo = vbo_context(ctx);
278 vbo->draw_indirect_prims = func;
279 }
280