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         context_bctx(ctx, VERTEX);
 147 }
 148
 149 /* Make some rendering decisions from the GL context. */
 150
 151 static void
 152 vbo_choose_render_mode(GLcontext *ctx, const struct gl_client_array **arrays)
 153 {
 154         struct nouveau_render_state *render = to_render_state(ctx);
 155         int i;
 156
 157         render->mode = VBO;
 158
 159         if (ctx->Light.Enabled) {
 160                 for (i = 0; i < MAT_ATTRIB_MAX; i++) {
 161                         if (arrays[VERT_ATTRIB_GENERIC0 + i]->StrideB) {
 162                                 render->mode = IMM;
 163                                 break;
 164                         }
 165                 }
 166         }
 167
 168         if (render->mode == VBO)
 169                 render->attr_count = NUM_VERTEX_ATTRS;
 170         else
 171                 render->attr_count = 0;
 172 }
 173
 174 static void
 175 vbo_emit_attr(GLcontext *ctx, const struct gl_client_array **arrays, int attr)
 176 {
 177         struct nouveau_channel *chan = context_chan(ctx);
 178         struct nouveau_render_state *render = to_render_state(ctx);
 179         const struct gl_client_array *array = arrays[attr];
 180         struct nouveau_array_state *a = &render->attrs[attr];
 181         RENDER_LOCALS(ctx);
 182
 183         if (!array->StrideB) {
 184                 if (attr >= VERT_ATTRIB_GENERIC0)
 185                         /* nouveau_update_state takes care of materials. */
 186                         return;
 187
 188                 /* Constant attribute. */
 189                 vbo_init_array(a, attr, array->StrideB, array->Size,
 190                                array->Type, array->BufferObj, array->Ptr,
 191                                GL_TRUE);
 192                 EMIT_IMM(ctx, a, 0);
 193                 vbo_deinit_array(a);
 194
 195         } else {
 196                 /* Varying attribute. */
 197                 struct nouveau_attr_info *info = &TAG(vertex_attrs)[attr];
 198
 199                 if (render->mode == VBO) {
 200                         render->map[info->vbo_index] = attr;
 201                         render->vertex_size += array->_ElementSize;
 202                 } else {
 203                         render->map[render->attr_count++] = attr;
 204                         render->vertex_size += 4 * info->imm_fields;
 205                 }
 206         }
 207 }
 208
 209 #define MAT(a) (VERT_ATTRIB_GENERIC0 + MAT_ATTRIB_##a)
 210
 211 static void
 212 vbo_choose_attrs(GLcontext *ctx, const struct gl_client_array **arrays)
 213 {
 214         struct nouveau_render_state *render = to_render_state(ctx);
 215         int i;
 216
 217         /* Reset the vertex size. */
 218         render->vertex_size = 0;
 219
 220         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_COLOR0);
 221         if (ctx->Fog.ColorSumEnabled && !ctx->Light.Enabled)
 222                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_COLOR1);
 223
 224         for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
 225                 if (ctx->Texture._EnabledCoordUnits & (1 << i))
 226                         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_TEX0 + i);
 227         }
 228
 229         if (ctx->Fog.Enabled && ctx->Fog.FogCoordinateSource == GL_FOG_COORD)
 230                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_FOG);
 231
 232         if (ctx->Light.Enabled ||
 233             (ctx->Texture._GenFlags & TEXGEN_NEED_NORMALS))
 234                 vbo_emit_attr(ctx, arrays, VERT_ATTRIB_NORMAL);
 235
 236         if (ctx->Light.Enabled) {
 237                 vbo_emit_attr(ctx, arrays, MAT(FRONT_AMBIENT));
 238                 vbo_emit_attr(ctx, arrays, MAT(FRONT_DIFFUSE));
 239                 vbo_emit_attr(ctx, arrays, MAT(FRONT_SPECULAR));
 240                 vbo_emit_attr(ctx, arrays, MAT(FRONT_SHININESS));
 241
 242                 if (ctx->Light.Model.TwoSide) {
 243                         vbo_emit_attr(ctx, arrays, MAT(BACK_AMBIENT));
 244                         vbo_emit_attr(ctx, arrays, MAT(BACK_DIFFUSE));
 245                         vbo_emit_attr(ctx, arrays, MAT(BACK_SPECULAR));
 246                         vbo_emit_attr(ctx, arrays, MAT(BACK_SHININESS));
 247                 }
 248         }
 249
 250         vbo_emit_attr(ctx, arrays, VERT_ATTRIB_POS);
 251 }
 252
 253 static int
 254 get_max_client_stride(GLcontext *ctx, const struct gl_client_array **arrays)
 255 {
 256         struct nouveau_render_state *render = to_render_state(ctx);
 257         int i, s = 0;
 258
 259         for (i = 0; i < render->attr_count; i++) {
 260                 int attr = render->map[i];
 261
 262                 if (attr >= 0) {
 263                         const struct gl_client_array *a = arrays[attr];
 264
 265                         if (!_mesa_is_bufferobj(a->BufferObj))
 266                                 s = MAX2(s, get_array_stride(ctx, a));
 267                 }
 268         }
 269
 270         return s;
 271 }
 272
 273 static void
 274 TAG(vbo_render_prims)(GLcontext *ctx, const struct gl_client_array **arrays,
 275                       const struct _mesa_prim *prims, GLuint nr_prims,
 276                       const struct _mesa_index_buffer *ib,
 277                       GLboolean index_bounds_valid,
 278                       GLuint min_index, GLuint max_index);
 279
 280 static GLboolean
 281 vbo_maybe_split(GLcontext *ctx, const struct gl_client_array **arrays,
 282             const struct _mesa_prim *prims, GLuint nr_prims,
 283             const struct _mesa_index_buffer *ib,
 284             GLuint min_index, GLuint max_index)
 285 {
 286         struct nouveau_context *nctx = to_nouveau_context(ctx);
 287         struct nouveau_render_state *render = to_render_state(ctx);
 288         unsigned pushbuf_avail = PUSHBUF_DWORDS - 2 * (nctx->bo.count +
 289                                                        render->attr_count),
 290                 vert_avail = get_max_vertices(ctx, NULL, pushbuf_avail),
 291                 idx_avail = get_max_vertices(ctx, ib, pushbuf_avail);
 292         int stride;
 293
 294         /* Try to keep client buffers smaller than the scratch BOs. */
 295         if (render->mode == VBO &&
 296             (stride = get_max_client_stride(ctx, arrays)))
 297                     vert_avail = MIN2(vert_avail,
 298                                       RENDER_SCRATCH_SIZE / stride);
 299
 300         if (max_index - min_index > vert_avail ||
 301             (ib && ib->count > idx_avail)) {
 302                 struct split_limits limits = {
 303                         .max_verts = vert_avail,
 304                         .max_indices = idx_avail,
 305                         .max_vb_size = ~0,
 306                 };
 307
 308                 vbo_split_prims(ctx, arrays, prims, nr_prims, ib, min_index,
 309                                 max_index, TAG(vbo_render_prims), &limits);
 310                 return GL_TRUE;
 311         }
 312
 313         return GL_FALSE;
 314 }
 315
 316 /* VBO rendering path. */
 317
 318 static void
 319 vbo_bind_vertices(GLcontext *ctx, const struct gl_client_array **arrays,
 320                   GLint basevertex, GLuint min_index, GLuint max_index)
 321 {
 322         struct nouveau_render_state *render = to_render_state(ctx);
 323         int i;
 324
 325         for (i = 0; i < NUM_VERTEX_ATTRS; i++) {
 326                 int attr = render->map[i];
 327
 328                 if (attr >= 0) {
 329                         const struct gl_client_array *array = arrays[attr];
 330                         struct nouveau_array_state *a = &render->attrs[attr];
 331                         unsigned delta = (basevertex + min_index)
 332                                 * array->StrideB;
 333
 334                         if (a->bo) {
 335                                 /* Array in a buffer obj. */
 336                                 a->offset = (intptr_t)array->Ptr + delta;
 337                         } else {
 338                                 int j, n = max_index - min_index + 1;
 339                                 char *sp = (char *)array->Ptr + delta;
 340                                 char *dp = get_scratch_vbo(ctx, n * a->stride,
 341                                                            &a->bo, &a->offset);
 342
 343                                 /* Array in client memory, move it to
 344                                  * a scratch buffer obj. */
 345                                 for (j = 0; j < n; j++)
 346                                         memcpy(dp + j * a->stride,
 347                                                sp + j * array->StrideB,
 348                                                a->stride);
 349                         }
 350                 }
 351         }
 352
 353         TAG(render_bind_vertices)(ctx);
 354 }
 355
 356 static void
 357 vbo_draw_vbo(GLcontext *ctx, const struct gl_client_array **arrays,
 358              const struct _mesa_prim *prims, GLuint nr_prims,
 359              const struct _mesa_index_buffer *ib, GLuint min_index,
 360              GLuint max_index)
 361 {
 362         struct nouveau_channel *chan = context_chan(ctx);
 363         dispatch_t dispatch;
 364         int delta = -min_index, basevertex = 0, i;
 365         RENDER_LOCALS(ctx);
 366
 367         get_array_dispatch(&to_render_state(ctx)->ib, &dispatch);
 368
 369         TAG(render_set_format)(ctx);
 370
 371         for (i = 0; i < nr_prims; i++) {
 372                 unsigned start = prims[i].start,
 373                         count = prims[i].count;
 374
 375                 if (i == 0 || basevertex != prims[i].basevertex) {
 376                         basevertex = prims[i].basevertex;
 377                         vbo_bind_vertices(ctx, arrays, basevertex,
 378                                           min_index, max_index);
 379                 }
 380
 381                 if (count > get_max_vertices(ctx, ib, AVAIL_RING(chan)))
 382                         WAIT_RING(chan, PUSHBUF_DWORDS);
 383
 384                 BATCH_BEGIN(nvgl_primitive(prims[i].mode));
 385                 dispatch(ctx, start, delta, count);
 386                 BATCH_END();
 387         }
 388 }
 389
 390 /* Immediate rendering path. */
 391
 392 static unsigned
 393 extract_id(struct nouveau_array_state *a, int i, int j)
 394 {
 395         return j;
 396 }
 397
 398 static void
 399 vbo_draw_imm(GLcontext *ctx, const struct gl_client_array **arrays,
 400              const struct _mesa_prim *prims, GLuint nr_prims,
 401              const struct _mesa_index_buffer *ib, GLuint min_index,
 402              GLuint max_index)
 403 {
 404         struct nouveau_render_state *render = to_render_state(ctx);
 405         struct nouveau_channel *chan = context_chan(ctx);
 406         extract_u_t extract = ib ? render->ib.extract_u : extract_id;
 407         int i, j, k;
 408         RENDER_LOCALS(ctx);
 409
 410         for (i = 0; i < nr_prims; i++) {
 411                 unsigned start = prims[i].start,
 412                         end = start + prims[i].count;
 413
 414                 if (prims[i].count > get_max_vertices(ctx, ib,
 415                                                       AVAIL_RING(chan)))
 416                         WAIT_RING(chan, PUSHBUF_DWORDS);
 417
 418                 BATCH_BEGIN(nvgl_primitive(prims[i].mode));
 419
 420                 for (; start < end; start++) {
 421                         j = prims[i].basevertex +
 422                                 extract(&render->ib, 0, start);
 423
 424                         for (k = 0; k < render->attr_count; k++)
 425                                 EMIT_IMM(ctx, &render->attrs[render->map[k]],
 426                                          j);
 427                 }
 428
 429                 BATCH_END();
 430         }
 431 }
 432
 433 /* draw_prims entry point when we're doing hw-tnl. */
 434
 435 static void
 436 TAG(vbo_render_prims)(GLcontext *ctx, const struct gl_client_array **arrays,
 437                       const struct _mesa_prim *prims, GLuint nr_prims,
 438                       const struct _mesa_index_buffer *ib,
 439                       GLboolean index_bounds_valid,
 440                       GLuint min_index, GLuint max_index)
 441 {
 442         struct nouveau_render_state *render = to_render_state(ctx);
 443
 444         if (!index_bounds_valid)
 445                 vbo_get_minmax_index(ctx, prims, ib, &min_index, &max_index);
 446
 447         vbo_choose_render_mode(ctx, arrays);
 448         vbo_choose_attrs(ctx, arrays);
 449
 450         if (vbo_maybe_split(ctx, arrays, prims, nr_prims, ib, min_index,
 451                             max_index))
 452                 return;
 453
 454         vbo_init_arrays(ctx, ib, arrays);
 455
 456         if (render->mode == VBO)
 457                 vbo_draw_vbo(ctx, arrays, prims, nr_prims, ib, min_index,
 458                              max_index);
 459         else
 460                 vbo_draw_imm(ctx, arrays, prims, nr_prims, ib, min_index,
 461                              max_index);
 462
 463         vbo_deinit_arrays(ctx, ib, arrays);
 464 }