src/gallium/drivers/llvmpipe/lp_setup_vbuf.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
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   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * Interface between 'draw' module's output and the llvmpipe rasterizer/setup
  30  * code.  When the 'draw' module has finished filling a vertex buffer, the
  31  * draw_arrays() functions below will be called.  Loop over the vertices and
  32  * call the point/line/tri setup functions.
  33  *
  34  * Authors
  35  *  Brian Paul
  36  */
  37
  38
  39 #include "lp_setup_context.h"
  40 #include "lp_context.h"
  41 #include "draw/draw_vbuf.h"
  42 #include "draw/draw_vertex.h"
  43 #include "util/u_memory.h"
  44
  45
  46 #define LP_MAX_VBUF_INDEXES 1024
  47 #define LP_MAX_VBUF_SIZE    4096
  48
  49
  50
  51 /** cast wrapper */
  52 static struct lp_setup_context *
  53 lp_setup_context(struct vbuf_render *vbr)
  54 {
  55    return (struct lp_setup_context *) vbr;
  56 }
  57
  58
  59
  60 static const struct vertex_info *
  61 lp_setup_get_vertex_info(struct vbuf_render *vbr)
  62 {
  63    struct lp_setup_context *setup = lp_setup_context(vbr);
  64
  65    /* Vertex size/info depends on the latest state.
  66     * The draw module may have issued additional state-change commands.
  67     */
  68    lp_setup_update_state(setup, FALSE);
  69
  70    return setup->vertex_info;
  71 }
  72
  73
  74 static boolean
  75 lp_setup_allocate_vertices(struct vbuf_render *vbr,
  76                           ushort vertex_size, ushort nr_vertices)
  77 {
  78    struct lp_setup_context *setup = lp_setup_context(vbr);
  79    unsigned size = vertex_size * nr_vertices;
  80
  81    if (setup->vertex_buffer_size < size) {
  82       align_free(setup->vertex_buffer);
  83       setup->vertex_buffer = align_malloc(size, 16);
  84       setup->vertex_buffer_size = size;
  85    }
  86
  87    setup->vertex_size = vertex_size;
  88    setup->nr_vertices = nr_vertices;
  89
  90    return setup->vertex_buffer != NULL;
  91 }
  92
  93 static void
  94 lp_setup_release_vertices(struct vbuf_render *vbr)
  95 {
  96    /* keep the old allocation for next time */
  97 }
  98
  99 static void *
 100 lp_setup_map_vertices(struct vbuf_render *vbr)
 101 {
 102    struct lp_setup_context *setup = lp_setup_context(vbr);
 103    return setup->vertex_buffer;
 104 }
 105
 106 static void
 107 lp_setup_unmap_vertices(struct vbuf_render *vbr,
 108                        ushort min_index,
 109                        ushort max_index )
 110 {
 111    struct lp_setup_context *setup = lp_setup_context(vbr);
 112    assert( setup->vertex_buffer_size >= (max_index+1) * setup->vertex_size );
 113    /* do nothing */
 114 }
 115
 116
 117 static void
 118 lp_setup_set_primitive(struct vbuf_render *vbr, unsigned prim)
 119 {
 120    lp_setup_context(vbr)->prim = prim;
 121 }
 122
 123 typedef const float (*const_float4_ptr)[4];
 124
 125 static inline const_float4_ptr get_vert( const void *vertex_buffer,
 126                                          int index,
 127                                          int stride )
 128 {
 129    return (const_float4_ptr)((char *)vertex_buffer + index * stride);
 130 }
 131
 132 /**
 133  * draw elements / indexed primitives
 134  */
 135 static void
 136 lp_setup_draw_elements(struct vbuf_render *vbr, const ushort *indices, uint nr)
 137 {
 138    struct lp_setup_context *setup = lp_setup_context(vbr);
 139    const unsigned stride = setup->vertex_info->size * sizeof(float);
 140    const void *vertex_buffer = setup->vertex_buffer;
 141    const boolean flatshade_first = setup->flatshade_first;
 142    unsigned i;
 143
 144    assert(setup->setup.variant);
 145
 146    if (!lp_setup_update_state(setup, TRUE))
 147       return;
 148
 149    switch (setup->prim) {
 150    case PIPE_PRIM_POINTS:
 151       for (i = 0; i < nr; i++) {
 152          setup->point( setup,
 153                        get_vert(vertex_buffer, indices[i-0], stride) );
 154       }
 155       break;
 156
 157    case PIPE_PRIM_LINES:
 158       for (i = 1; i < nr; i += 2) {
 159          setup->line( setup,
 160                       get_vert(vertex_buffer, indices[i-1], stride),
 161                       get_vert(vertex_buffer, indices[i-0], stride) );
 162       }
 163       break;
 164
 165    case PIPE_PRIM_LINE_STRIP:
 166       for (i = 1; i < nr; i ++) {
 167          setup->line( setup,
 168                       get_vert(vertex_buffer, indices[i-1], stride),
 169                       get_vert(vertex_buffer, indices[i-0], stride) );
 170       }
 171       break;
 172
 173    case PIPE_PRIM_LINE_LOOP:
 174       for (i = 1; i < nr; i ++) {
 175          setup->line( setup,
 176                       get_vert(vertex_buffer, indices[i-1], stride),
 177                       get_vert(vertex_buffer, indices[i-0], stride) );
 178       }
 179       if (nr) {
 180          setup->line( setup,
 181                       get_vert(vertex_buffer, indices[nr-1], stride),
 182                       get_vert(vertex_buffer, indices[0], stride) );
 183       }
 184       break;
 185
 186    case PIPE_PRIM_TRIANGLES:
 187       for (i = 2; i < nr; i += 3) {
 188          setup->triangle( setup,
 189                           get_vert(vertex_buffer, indices[i-2], stride),
 190                           get_vert(vertex_buffer, indices[i-1], stride),
 191                           get_vert(vertex_buffer, indices[i-0], stride) );
 192       }
 193       break;
 194
 195    case PIPE_PRIM_TRIANGLE_STRIP:
 196       if (flatshade_first) {
 197          for (i = 2; i < nr; i += 1) {
 198             /* emit first triangle vertex as first triangle vertex */
 199             setup->triangle( setup,
 200                              get_vert(vertex_buffer, indices[i-2], stride),
 201                              get_vert(vertex_buffer, indices[i+(i&1)-1], stride),
 202                              get_vert(vertex_buffer, indices[i-(i&1)], stride) );
 203
 204          }
 205       }
 206       else {
 207          for (i = 2; i < nr; i += 1) {
 208             /* emit last triangle vertex as last triangle vertex */
 209             setup->triangle( setup,
 210                              get_vert(vertex_buffer, indices[i+(i&1)-2], stride),
 211                              get_vert(vertex_buffer, indices[i-(i&1)-1], stride),
 212                              get_vert(vertex_buffer, indices[i-0], stride) );
 213          }
 214       }
 215       break;
 216
 217    case PIPE_PRIM_TRIANGLE_FAN:
 218       if (flatshade_first) {
 219          for (i = 2; i < nr; i += 1) {
 220             /* emit first non-spoke vertex as first vertex */
 221             setup->triangle( setup,
 222                              get_vert(vertex_buffer, indices[i-1], stride),
 223                              get_vert(vertex_buffer, indices[i-0], stride),
 224                              get_vert(vertex_buffer, indices[0], stride) );
 225          }
 226       }
 227       else {
 228          for (i = 2; i < nr; i += 1) {
 229             /* emit last non-spoke vertex as last vertex */
 230             setup->triangle( setup,
 231                              get_vert(vertex_buffer, indices[0], stride),
 232                              get_vert(vertex_buffer, indices[i-1], stride),
 233                              get_vert(vertex_buffer, indices[i-0], stride) );
 234          }
 235       }
 236       break;
 237
 238    case PIPE_PRIM_QUADS:
 239       /* GL quads don't follow provoking vertex convention */
 240       if (flatshade_first) {
 241          /* emit last quad vertex as first triangle vertex */
 242          for (i = 3; i < nr; i += 4) {
 243             setup->triangle( setup,
 244                              get_vert(vertex_buffer, indices[i-0], stride),
 245                              get_vert(vertex_buffer, indices[i-3], stride),
 246                              get_vert(vertex_buffer, indices[i-2], stride) );
 247
 248             setup->triangle( setup,
 249                              get_vert(vertex_buffer, indices[i-0], stride),
 250                              get_vert(vertex_buffer, indices[i-2], stride),
 251                              get_vert(vertex_buffer, indices[i-1], stride) );
 252          }
 253       }
 254       else {
 255          /* emit last quad vertex as last triangle vertex */
 256          for (i = 3; i < nr; i += 4) {
 257             setup->triangle( setup,
 258                           get_vert(vertex_buffer, indices[i-3], stride),
 259                           get_vert(vertex_buffer, indices[i-2], stride),
 260                           get_vert(vertex_buffer, indices[i-0], stride) );
 261
 262             setup->triangle( setup,
 263                              get_vert(vertex_buffer, indices[i-2], stride),
 264                              get_vert(vertex_buffer, indices[i-1], stride),
 265                              get_vert(vertex_buffer, indices[i-0], stride) );
 266          }
 267       }
 268       break;
 269
 270    case PIPE_PRIM_QUAD_STRIP:
 271       /* GL quad strips don't follow provoking vertex convention */
 272       if (flatshade_first) {
 273          /* emit last quad vertex as first triangle vertex */
 274          for (i = 3; i < nr; i += 2) {
 275             setup->triangle( setup,
 276                              get_vert(vertex_buffer, indices[i-0], stride),
 277                              get_vert(vertex_buffer, indices[i-3], stride),
 278                              get_vert(vertex_buffer, indices[i-2], stride) );
 279             setup->triangle( setup,
 280                              get_vert(vertex_buffer, indices[i-0], stride),
 281                              get_vert(vertex_buffer, indices[i-1], stride),
 282                              get_vert(vertex_buffer, indices[i-3], stride) );
 283          }
 284       }
 285       else {
 286          /* emit last quad vertex as last triangle vertex */
 287          for (i = 3; i < nr; i += 2) {
 288             setup->triangle( setup,
 289                              get_vert(vertex_buffer, indices[i-3], stride),
 290                              get_vert(vertex_buffer, indices[i-2], stride),
 291                              get_vert(vertex_buffer, indices[i-0], stride) );
 292             setup->triangle( setup,
 293                              get_vert(vertex_buffer, indices[i-1], stride),
 294                              get_vert(vertex_buffer, indices[i-3], stride),
 295                              get_vert(vertex_buffer, indices[i-0], stride) );
 296          }
 297       }
 298       break;
 299
 300    case PIPE_PRIM_POLYGON:
 301       /* Almost same as tri fan but the _first_ vertex specifies the flat
 302        * shading color.
 303        */
 304       if (flatshade_first) {
 305          /* emit first polygon  vertex as first triangle vertex */
 306          for (i = 2; i < nr; i += 1) {
 307             setup->triangle( setup,
 308                              get_vert(vertex_buffer, indices[0], stride),
 309                              get_vert(vertex_buffer, indices[i-1], stride),
 310                              get_vert(vertex_buffer, indices[i-0], stride) );
 311          }
 312       }
 313       else {
 314          /* emit first polygon  vertex as last triangle vertex */
 315          for (i = 2; i < nr; i += 1) {
 316             setup->triangle( setup,
 317                              get_vert(vertex_buffer, indices[i-1], stride),
 318                              get_vert(vertex_buffer, indices[i-0], stride),
 319                              get_vert(vertex_buffer, indices[0], stride) );
 320          }
 321       }
 322       break;
 323
 324    default:
 325       assert(0);
 326    }
 327 }
 328
 329
 330 /**
 331  * This function is hit when the draw module is working in pass-through mode.
 332  * It's up to us to convert the vertex array into point/line/tri prims.
 333  */
 334 static void
 335 lp_setup_draw_arrays(struct vbuf_render *vbr, uint start, uint nr)
 336 {
 337    struct lp_setup_context *setup = lp_setup_context(vbr);
 338    const unsigned stride = setup->vertex_info->size * sizeof(float);
 339    const void *vertex_buffer =
 340       (void *) get_vert(setup->vertex_buffer, start, stride);
 341    const boolean flatshade_first = setup->flatshade_first;
 342    unsigned i;
 343
 344    if (!lp_setup_update_state(setup, TRUE))
 345       return;
 346
 347    switch (setup->prim) {
 348    case PIPE_PRIM_POINTS:
 349       for (i = 0; i < nr; i++) {
 350          setup->point( setup,
 351                        get_vert(vertex_buffer, i-0, stride) );
 352       }
 353       break;
 354
 355    case PIPE_PRIM_LINES:
 356       for (i = 1; i < nr; i += 2) {
 357          setup->line( setup,
 358                       get_vert(vertex_buffer, i-1, stride),
 359                       get_vert(vertex_buffer, i-0, stride) );
 360       }
 361       break;
 362
 363    case PIPE_PRIM_LINE_STRIP:
 364       for (i = 1; i < nr; i ++) {
 365          setup->line( setup,
 366                       get_vert(vertex_buffer, i-1, stride),
 367                       get_vert(vertex_buffer, i-0, stride) );
 368       }
 369       break;
 370
 371    case PIPE_PRIM_LINE_LOOP:
 372       for (i = 1; i < nr; i ++) {
 373          setup->line( setup,
 374                       get_vert(vertex_buffer, i-1, stride),
 375                       get_vert(vertex_buffer, i-0, stride) );
 376       }
 377       if (nr) {
 378          setup->line( setup,
 379                       get_vert(vertex_buffer, nr-1, stride),
 380                       get_vert(vertex_buffer, 0, stride) );
 381       }
 382       break;
 383
 384    case PIPE_PRIM_TRIANGLES:
 385       for (i = 2; i < nr; i += 3) {
 386          setup->triangle( setup,
 387                           get_vert(vertex_buffer, i-2, stride),
 388                           get_vert(vertex_buffer, i-1, stride),
 389                           get_vert(vertex_buffer, i-0, stride) );
 390       }
 391       break;
 392
 393    case PIPE_PRIM_TRIANGLE_STRIP:
 394       if (flatshade_first) {
 395          for (i = 2; i < nr; i++) {
 396             /* emit first triangle vertex as first triangle vertex */
 397             setup->triangle( setup,
 398                              get_vert(vertex_buffer, i-2, stride),
 399                              get_vert(vertex_buffer, i+(i&1)-1, stride),
 400                              get_vert(vertex_buffer, i-(i&1), stride) );
 401          }
 402       }
 403       else {
 404          for (i = 2; i < nr; i++) {
 405             /* emit last triangle vertex as last triangle vertex */
 406             setup->triangle( setup,
 407                              get_vert(vertex_buffer, i+(i&1)-2, stride),
 408                              get_vert(vertex_buffer, i-(i&1)-1, stride),
 409                              get_vert(vertex_buffer, i-0, stride) );
 410          }
 411       }
 412       break;
 413
 414    case PIPE_PRIM_TRIANGLE_FAN:
 415       if (flatshade_first) {
 416          for (i = 2; i < nr; i += 1) {
 417             /* emit first non-spoke vertex as first vertex */
 418             setup->triangle( setup,
 419                              get_vert(vertex_buffer, i-1, stride),
 420                              get_vert(vertex_buffer, i-0, stride),
 421                              get_vert(vertex_buffer, 0, stride)  );
 422          }
 423       }
 424       else {
 425          for (i = 2; i < nr; i += 1) {
 426             /* emit last non-spoke vertex as last vertex */
 427             setup->triangle( setup,
 428                              get_vert(vertex_buffer, 0, stride),
 429                              get_vert(vertex_buffer, i-1, stride),
 430                              get_vert(vertex_buffer, i-0, stride) );
 431          }
 432       }
 433       break;
 434
 435    case PIPE_PRIM_QUADS:
 436       /* GL quads don't follow provoking vertex convention */
 437       if (flatshade_first) {
 438          /* emit last quad vertex as first triangle vertex */
 439          for (i = 3; i < nr; i += 4) {
 440             setup->triangle( setup,
 441                              get_vert(vertex_buffer, i-0, stride),
 442                              get_vert(vertex_buffer, i-3, stride),
 443                              get_vert(vertex_buffer, i-2, stride) );
 444             setup->triangle( setup,
 445                              get_vert(vertex_buffer, i-0, stride),
 446                              get_vert(vertex_buffer, i-2, stride),
 447                              get_vert(vertex_buffer, i-1, stride) );
 448          }
 449       }
 450       else {
 451          /* emit last quad vertex as last triangle vertex */
 452          for (i = 3; i < nr; i += 4) {
 453             setup->triangle( setup,
 454                              get_vert(vertex_buffer, i-3, stride),
 455                              get_vert(vertex_buffer, i-2, stride),
 456                              get_vert(vertex_buffer, i-0, stride) );
 457             setup->triangle( setup,
 458                              get_vert(vertex_buffer, i-2, stride),
 459                              get_vert(vertex_buffer, i-1, stride),
 460                              get_vert(vertex_buffer, i-0, stride) );
 461          }
 462       }
 463       break;
 464
 465    case PIPE_PRIM_QUAD_STRIP:
 466       /* GL quad strips don't follow provoking vertex convention */
 467       if (flatshade_first) {
 468          /* emit last quad vertex as first triangle vertex */
 469          for (i = 3; i < nr; i += 2) {
 470             setup->triangle( setup,
 471                              get_vert(vertex_buffer, i-0, stride),
 472                              get_vert(vertex_buffer, i-3, stride),
 473                              get_vert(vertex_buffer, i-2, stride) );
 474             setup->triangle( setup,
 475                              get_vert(vertex_buffer, i-0, stride),
 476                              get_vert(vertex_buffer, i-1, stride),
 477                              get_vert(vertex_buffer, i-3, stride) );
 478          }
 479       }
 480       else {
 481          /* emit last quad vertex as last triangle vertex */
 482          for (i = 3; i < nr; i += 2) {
 483             setup->triangle( setup,
 484                              get_vert(vertex_buffer, i-3, stride),
 485                              get_vert(vertex_buffer, i-2, stride),
 486                              get_vert(vertex_buffer, i-0, stride) );
 487             setup->triangle( setup,
 488                              get_vert(vertex_buffer, i-1, stride),
 489                              get_vert(vertex_buffer, i-3, stride),
 490                              get_vert(vertex_buffer, i-0, stride) );
 491          }
 492       }
 493       break;
 494
 495    case PIPE_PRIM_POLYGON:
 496       /* Almost same as tri fan but the _first_ vertex specifies the flat
 497        * shading color.
 498        */
 499       if (flatshade_first) {
 500          /* emit first polygon  vertex as first triangle vertex */
 501          for (i = 2; i < nr; i += 1) {
 502             setup->triangle( setup,
 503                              get_vert(vertex_buffer, 0, stride),
 504                              get_vert(vertex_buffer, i-1, stride),
 505                              get_vert(vertex_buffer, i-0, stride) );
 506          }
 507       }
 508       else {
 509          /* emit first polygon  vertex as last triangle vertex */
 510          for (i = 2; i < nr; i += 1) {
 511             setup->triangle( setup,
 512                              get_vert(vertex_buffer, i-1, stride),
 513                              get_vert(vertex_buffer, i-0, stride),
 514                              get_vert(vertex_buffer, 0, stride) );
 515          }
 516       }
 517       break;
 518
 519    default:
 520       assert(0);
 521    }
 522 }
 523
 524
 525
 526 static void
 527 lp_setup_vbuf_destroy(struct vbuf_render *vbr)
 528 {
 529    struct lp_setup_context *setup = lp_setup_context(vbr);
 530    if (setup->vertex_buffer) {
 531       align_free(setup->vertex_buffer);
 532       setup->vertex_buffer = NULL;
 533    }
 534    lp_setup_destroy(setup);
 535 }
 536
 537 /*
 538  * FIXME: it is unclear if primitives_storage_needed (which is generally
 539  * the same as pipe query num_primitives_generated) should increase
 540  * if SO is disabled for d3d10, but for GL we definitely need to
 541  * increase num_primitives_generated and this is only called for active
 542  * SO. If it must not increase for d3d10 need to disambiguate the counters
 543  * in the driver and do some work for getting correct values, if it should
 544  * increase too should call this from outside streamout code.
 545  */
 546 static void
 547 lp_setup_so_info(struct vbuf_render *vbr, uint primitives, uint prim_generated)
 548 {
 549    struct lp_setup_context *setup = lp_setup_context(vbr);
 550    struct llvmpipe_context *lp = llvmpipe_context(setup->pipe);
 551
 552    lp->so_stats.num_primitives_written += primitives;
 553    lp->so_stats.primitives_storage_needed += prim_generated;
 554 }
 555
 556 static void
 557 lp_setup_pipeline_statistics(
 558    struct vbuf_render *vbr,
 559    const struct pipe_query_data_pipeline_statistics *stats)
 560 {
 561    struct lp_setup_context *setup = lp_setup_context(vbr);
 562    struct llvmpipe_context *llvmpipe = llvmpipe_context(setup->pipe);
 563
 564    llvmpipe->pipeline_statistics.ia_vertices +=
 565       stats->ia_vertices;
 566    llvmpipe->pipeline_statistics.ia_primitives +=
 567       stats->ia_primitives;
 568    llvmpipe->pipeline_statistics.vs_invocations +=
 569       stats->vs_invocations;
 570    llvmpipe->pipeline_statistics.gs_invocations +=
 571       stats->gs_invocations;
 572    llvmpipe->pipeline_statistics.gs_primitives +=
 573       stats->gs_primitives;
 574    if (!llvmpipe_rasterization_disabled(llvmpipe)) {
 575       llvmpipe->pipeline_statistics.c_invocations +=
 576          stats->c_invocations;
 577    } else {
 578       llvmpipe->pipeline_statistics.c_invocations = 0;
 579    }
 580 }
 581
 582 /**
 583  * Create the post-transform vertex handler for the given context.
 584  */
 585 void
 586 lp_setup_init_vbuf(struct lp_setup_context *setup)
 587 {
 588    setup->base.max_indices = LP_MAX_VBUF_INDEXES;
 589    setup->base.max_vertex_buffer_bytes = LP_MAX_VBUF_SIZE;
 590
 591    setup->base.get_vertex_info = lp_setup_get_vertex_info;
 592    setup->base.allocate_vertices = lp_setup_allocate_vertices;
 593    setup->base.map_vertices = lp_setup_map_vertices;
 594    setup->base.unmap_vertices = lp_setup_unmap_vertices;
 595    setup->base.set_primitive = lp_setup_set_primitive;
 596    setup->base.draw_elements = lp_setup_draw_elements;
 597    setup->base.draw_arrays = lp_setup_draw_arrays;
 598    setup->base.release_vertices = lp_setup_release_vertices;
 599    setup->base.destroy = lp_setup_vbuf_destroy;
 600    setup->base.set_stream_output_info = lp_setup_so_info;
 601    setup->base.pipeline_statistics = lp_setup_pipeline_statistics;
 602 }