src/mesa/drivers/dri/nouveau/nouveau_vbo_t.c

   1 /*
   2  * Copyright (C) 2009-2010 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "nouveau_bufferobj.h"
  28 #include "nouveau_util.h"
  29
  30 #include "main/bufferobj.h"
  31 #include "main/image.h"
  32
  33 /* Arbitrary pushbuf length we can assume we can get with a single
  34  * WAIT_RING. */
  35 #define PUSHBUF_DWORDS 2048
  36
  37 /* Functions to set up struct nouveau_array_state from something like
  38  * a GL array or index buffer. */
  39
  40 static void
  41 vbo_init_array(struct nouveau_array_state *a, int attr, int stride,
  42                int fields, int type, struct gl_buffer_object *obj,
  43                const void *ptr, GLboolean map)
  44 {
  45         a->attr = attr;
  46         a->stride = stride;
  47         a->fields = fields;
  48         a->type = type;
  49
  50         if (_mesa_is_bufferobj(obj)) {
  51                 nouveau_bo_ref(to_nouveau_bufferobj(obj)->bo, &a->bo);
  52                 a->offset = (intptr_t)ptr;
  53
  54                 if (map) {
  55                         nouveau_bo_map(a->bo, NOUVEAU_BO_RD);
  56                         a->buf = a->bo->map + a->offset;
  57                 } else {
  58                         a->buf = NULL;
  59                 }
  60
  61         } else {
  62                 nouveau_bo_ref(NULL, &a->bo);
  63                 a->offset = 0;
  64
  65                 if (map)
  66                         a->buf = ptr;
  67                 else
  68                         a->buf = NULL;
  69         }
  70
  71         if (a->buf)
  72                 get_array_extract(a, &a->extract_u, &a->extract_f);
  73 }
  74
  75 static void
  76 vbo_deinit_array(struct nouveau_array_state *a)
  77 {
  78         if (a->bo) {
  79                 if (a->bo->map)
  80                         nouveau_bo_unmap(a->bo);
  81                 nouveau_bo_ref(NULL, &a->bo);
  82         }
  83
  84         a->buf = NULL;
  85         a->fields = 0;
  86 }
  87
  88 static int
  89 get_array_stride(GLcontext *ctx, const struct gl_client_array *a)
  90 {
  91         struct nouveau_render_state *render = to_render_state(ctx);
  92
  93         if (render->mode == VBO && !_mesa_is_bufferobj(a->BufferObj))
  94                 /* Pack client buffers. */
  95                 return align(_mesa_sizeof_type(a->Type) * a->Size, 4);
  96         else
  97                 return a->StrideB;
  98 }
  99
 100 static void
 101 vbo_init_arrays(GLcontext *ctx, const struct _mesa_index_buffer *ib,
 102                 const struct gl_client_array **arrays)
 103 {
 104         struct nouveau_render_state *render = to_render_state(ctx);
 105         int i;
 106
 107         if (ib)
 108                 vbo_init_array(&render->ib, 0, 0, ib->count, ib->type,
 109                                ib->obj, ib->ptr, GL_TRUE);
 110
 111         for (i = 0; i < render->attr_count; i++) {
 112                 int attr = render->map[i];
 113
 114                 if (attr >= 0) {
 115                         const struct gl_client_array *array = arrays[attr];
 116
 117                         vbo_init_array(&render->attrs[attr], attr,
 118                                        get_array_stride(ctx, array),
 119                                        array->Size, array->Type,
 120                                        array->BufferObj, array->Ptr,
 121                                        render->mode == IMM);
 122                 }
 123         }
 124 }
 125
 126 static void
 127 vbo_deinit_arrays(GLcontext *ctx, const struct _mesa_index_buffer *ib,
 128                 const struct gl_client_array **arrays)
 129 {
 130         struct nouveau_render_state *render = to_render_state(ctx);
 131         int i;
 132
 133         if (ib)
 134                 vbo_deinit_array(&render->ib);
 135
 136         for (i = 0; i < render->attr_count; i++) {
 137                 int *attr = &render->map[i];
 138
 139                 if (*attr >= 0) {
 140                         vbo_deinit_array(&render->attrs[*attr]);
 141                         *attr = -1;
 142                 }
 143         }
 144
 145         render->attr_count = 0;
 146 }
 147
 148 /* Make some rendering decisions from the GL context. */
 149
 150 static void
 151 vbo_choose_render_mode(GLcontext *ctx, const struct gl_client_array **arrays)
 152 {
 153         struct nouveau_render_state *render = to_render_state(ctx);
 154         int i;
 155
 156         render->mode = VBO;
 157
 158         if (ctx->Light.Enabled) {
 159                 for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 160                         if (arrays[VERT_ATTRIB_GENERIC0 + i]->StrideB) {
 161                                 render->mode = IMM;
 162                                 break;
 163                         }
 164                 }
 165         }
 166
 167         if (render->mode == VBO)
 168                 render->attr_count = NUM_VERTEX_ATTRS;
 169         else
 170                 render->attr_count = 0;
 171 }
 172
 173 static void
 174 vbo_emit_attr(GLcontext *ctx, const struct gl_client_array **arrays, int attr)
 175 {
 176         struct nouveau_channel *chan = context_chan(ctx);
 177         struct nouveau_render_state *render = to_render_state(ctx);
 178         const struct gl_client_array *array = arrays[attr];
 179         struct nouveau_array_state *a = &render->attrs[attr];
 180         RENDER_LOCALS(ctx);
 181
 182         if (!array->StrideB) {
 183                 if (attr >= VERT_ATTRIB_GENERIC0)
 184                         /* nouveau_update_state takes care of materials. */
 185                         return;
 186
 187                 /* Constant attribute. */
 188                 vbo_init_array(a, attr, array->StrideB, array->Size,
 189                                array->Type, array->BufferObj, array->Ptr,
 190                                GL_TRUE);
 191                 EMIT_IMM(ctx, a, 0);
 192                 vbo_deinit_array(a);
 193
 194         } else {
 195                 /* Varying attribute. */
 196                 struct nouveau_attr_info *info = &TAG(vertex_attrs)[attr];
 197
 198                 if (render->mode == VBO) {
 199                         render->map[info->vbo_index] = attr;
 200                         render->vertex_size += array->_ElementSize;
 201                 } else {
 202                         render->map[render->attr_count++] = attr;
 203                         render->vertex_size += 4 * info->imm_fields;
 204                 }
 205         }
 206 }
 207
 208 #define MAT(a) (VERT_ATTRIB_GENERIC0 + MAT_ATTRIB_##a)
 209
 210 static void
 211 vbo_choose_attrs(GLcontext *ctx, const struct gl_client_array **arrays)
 212 {
 213         struct nouveau_render_state *render = to_render_state(ctx);
 214         int i;
 215
 216         /* Reset the vertex size. */
 217         render->vertex_size = 0;
 218
 219         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_COLOR0);
 220         if (ctx->Fog.ColorSumEnabled && !ctx->Light.Enabled)
 221                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_COLOR1);
 222
 223         for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 224                 if (ctx->Texture._EnabledCoordUnits & (1 << i))
 225                         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_TEX0 + i);
 226         }
 227
 228         if (ctx->Fog.Enabled && ctx->Fog.FogCoordinateSource == GL_FOG_COORD)
 229                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_FOG);
 230
 231         if (ctx->Light.Enabled ||
 232             (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS))
 233                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_NORMAL);
 234
 235         if (ctx->Light.Enabled) {
 236                 vbo_emit_attr(ctx, arrays, MAT(FRONT_AMBIENT));
 237                 vbo_emit_attr(ctx, arrays, MAT(FRONT_DIFFUSE));
 238                 vbo_emit_attr(ctx, arrays, MAT(FRONT_SPECULAR));
 239                 vbo_emit_attr(ctx, arrays, MAT(FRONT_SHININESS));
 240
 241                 if (ctx->Light.Model.TwoSide) {
 242                         vbo_emit_attr(ctx, arrays, MAT(BACK_AMBIENT));
 243                         vbo_emit_attr(ctx, arrays, MAT(BACK_DIFFUSE));
 244                         vbo_emit_attr(ctx, arrays, MAT(BACK_SPECULAR));
 245                         vbo_emit_attr(ctx, arrays, MAT(BACK_SHININESS));
 246                 }
 247         }
 248
 249         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_POS);
 250 }
 251
 252 static int
 253 get_max_client_stride(GLcontext *ctx, const struct gl_client_array **arrays)
 254 {
 255         struct nouveau_render_state *render = to_render_state(ctx);
 256         int i, s = 0;
 257
 258         for (i = 0; i < render->attr_count; i++) {
 259                 int attr = render->map[i];
 260
 261                 if (attr >= 0) {
 262                         const struct gl_client_array *a = arrays[attr];
 263
 264                         if (!_mesa_is_bufferobj(a->BufferObj))
 265                                 s = MAX2(s, get_array_stride(ctx, a));
 266                 }
 267         }
 268
 269         return s;
 270 }
 271
 272 static void
 273 TAG(vbo_render_prims)(GLcontext *ctx, const struct gl_client_array **arrays,
 274                       const struct _mesa_prim *prims, GLuint nr_prims,
 275                       const struct _mesa_index_buffer *ib,
 276                       GLboolean index_bounds_valid,
 277                       GLuint min_index, GLuint max_index);
 278
 279 static GLboolean
 280 vbo_maybe_split(GLcontext *ctx, const struct gl_client_array **arrays,
 281             const struct _mesa_prim *prims, GLuint nr_prims,
 282             const struct _mesa_index_buffer *ib,
 283             GLuint min_index, GLuint max_index)
 284 {
 285         struct nouveau_context *nctx = to_nouveau_context(ctx);
 286         struct nouveau_render_state *render = to_render_state(ctx);
 287         unsigned pushbuf_avail = PUSHBUF_DWORDS - 2 * (nctx->bo.count +
 288                                                        render->attr_count),
 289                 vert_avail = get_max_vertices(ctx, NULL, pushbuf_avail),
 290                 idx_avail = get_max_vertices(ctx, ib, pushbuf_avail);
 291         int stride;
 292
 293         /* Try to keep client buffers smaller than the scratch BOs. */
 294         if (render->mode == VBO &&
 295             (stride = get_max_client_stride(ctx, arrays)))
 296                     vert_avail = MIN2(vert_avail,
 297                                       RENDER_SCRATCH_SIZE / stride);
 298
 299         if (max_index - min_index > vert_avail ||
 300             (ib && ib->count > idx_avail)) {
 301                 struct split_limits limits = {
 302                         .max_verts = vert_avail,
 303                         .max_indices = idx_avail,
 304                         .max_vb_size = ~0,
 305                 };
 306
 307                 vbo_split_prims(ctx, arrays, prims, nr_prims, ib, min_index,
 308                                 max_index, TAG(vbo_render_prims), &limits);
 309                 return GL_TRUE;
 310         }
 311
 312         return GL_FALSE;
 313 }
 314
 315 /* VBO rendering path. */
 316
 317 static void
 318 vbo_bind_vertices(GLcontext *ctx, const struct gl_client_array **arrays,
 319                   GLint basevertex, GLuint min_index, GLuint max_index)
 320 {
 321         struct nouveau_render_state *render = to_render_state(ctx);
 322         int i;
 323
 324         for (i = 0; i < NUM_VERTEX_ATTRS; i++) {
 325                 int attr = render->map[i];
 326
 327                 if (attr >= 0) {
 328                         const struct gl_client_array *array = arrays[attr];
 329                         struct nouveau_array_state *a = &render->attrs[attr];
 330                         unsigned delta = (basevertex + min_index)
 331                                 * array->StrideB;
 332
 333                         if (a->bo) {
 334                                 /* Array in a buffer obj. */
 335                                 a->offset = (intptr_t)array->Ptr + delta;
 336                         } else {
 337                                 int j, n = max_index - min_index + 1;
 338                                 char *sp = (char *)array->Ptr + delta;
 339                                 char *dp = get_scratch_vbo(ctx, n * a->stride,
 340                                                            &a->bo, &a->offset);
 341
 342                                 /* Array in client memory, move it to
 343                                  * a scratch buffer obj. */
 344                                 for (j = 0; j < n; j++)
 345                                         memcpy(dp + j * a->stride,
 346                                                sp + j * array->StrideB,
 347                                                a->stride);
 348                         }
 349                 }
 350         }
 351
 352         TAG(render_bind_vertices)(ctx);
 353 }
 354
 355 static void
 356 vbo_draw_vbo(GLcontext *ctx, const struct gl_client_array **arrays,
 357              const struct _mesa_prim *prims, GLuint nr_prims,
 358              const struct _mesa_index_buffer *ib, GLuint min_index,
 359              GLuint max_index)
 360 {
 361         struct nouveau_channel *chan = context_chan(ctx);
 362         dispatch_t dispatch;
 363         int delta = -min_index, basevertex = 0, i;
 364         RENDER_LOCALS(ctx);
 365
 366         get_array_dispatch(&to_render_state(ctx)->ib, &dispatch);
 367
 368         TAG(render_set_format)(ctx);
 369
 370         for (i = 0; i < nr_prims; i++) {
 371                 unsigned start = prims[i].start,
 372                         count = prims[i].count;
 373
 374                 if (i == 0 || basevertex != prims[i].basevertex) {
 375                         basevertex = prims[i].basevertex;
 376                         vbo_bind_vertices(ctx, arrays, basevertex,
 377                                           min_index, max_index);
 378                 }
 379
 380                 if (count > get_max_vertices(ctx, ib, AVAIL_RING(chan)))
 381                         WAIT_RING(chan, PUSHBUF_DWORDS);
 382
 383                 BATCH_BEGIN(nvgl_primitive(prims[i].mode));
 384                 dispatch(ctx, start, delta, count);
 385                 BATCH_END();
 386         }
 387 }
 388
 389 /* Immediate rendering path. */
 390
 391 static unsigned
 392 extract_id(struct nouveau_array_state *a, int i, int j)
 393 {
 394         return j;
 395 }
 396
 397 static void
 398 vbo_draw_imm(GLcontext *ctx, const struct gl_client_array **arrays,
 399              const struct _mesa_prim *prims, GLuint nr_prims,
 400              const struct _mesa_index_buffer *ib, GLuint min_index,
 401              GLuint max_index)
 402 {
 403         struct nouveau_render_state *render = to_render_state(ctx);
 404         struct nouveau_channel *chan = context_chan(ctx);
 405         extract_u_t extract = ib ? render->ib.extract_u : extract_id;
 406         int i, j, k;
 407         RENDER_LOCALS(ctx);
 408
 409         for (i = 0; i < nr_prims; i++) {
 410                 unsigned start = prims[i].start,
 411                         end = start + prims[i].count;
 412
 413                 if (prims[i].count > get_max_vertices(ctx, ib,
 414                                                       AVAIL_RING(chan)))
 415                         WAIT_RING(chan, PUSHBUF_DWORDS);
 416
 417                 BATCH_BEGIN(nvgl_primitive(prims[i].mode));
 418
 419                 for (; start < end; start++) {
 420                         j = prims[i].basevertex +
 421                                 extract(&render->ib, 0, start);
 422
 423                         for (k = 0; k < render->attr_count; k++)
 424                                 EMIT_IMM(ctx, &render->attrs[render->map[k]],
 425                                          j);
 426                 }
 427
 428                 BATCH_END();
 429         }
 430 }
 431
 432 /* draw_prims entry point when we're doing hw-tnl. */
 433
 434 static void
 435 TAG(vbo_render_prims)(GLcontext *ctx, const struct gl_client_array **arrays,
 436                       const struct _mesa_prim *prims, GLuint nr_prims,
 437                       const struct _mesa_index_buffer *ib,
 438                       GLboolean index_bounds_valid,
 439                       GLuint min_index, GLuint max_index)
 440 {
 441         struct nouveau_render_state *render = to_render_state(ctx);
 442
 443         if (!index_bounds_valid)
 444                 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 445
 446         vbo_choose_render_mode(ctx, arrays);
 447         vbo_choose_attrs(ctx, arrays);
 448
 449         if (vbo_maybe_split(ctx, arrays, prims, nr_prims, ib, min_index,
 450                             max_index))
 451                 return;
 452
 453         vbo_init_arrays(ctx, ib, arrays);
 454
 455         if (render->mode == VBO)
 456                 vbo_draw_vbo(ctx, arrays, prims, nr_prims, ib, min_index,
 457                              max_index);
 458         else
 459                 vbo_draw_imm(ctx, arrays, prims, nr_prims, ib, min_index,
 460                              max_index);
 461
 462         vbo_deinit_arrays(ctx, ib, arrays);
 463 }