src/gallium/auxiliary/draw/draw_context.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * 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
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  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 TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28  /*
  29   * Authors:
  30   *   Keith Whitwell <keith@tungstengraphics.com>
  31   */
  32
  33
  34 #include "pipe/p_context.h"
  35 #include "util/u_memory.h"
  36 #include "util/u_math.h"
  37 #include "util/u_cpu_detect.h"
  38 #include "util/u_inlines.h"
  39 #include "draw_context.h"
  40 #include "draw_vs.h"
  41 #include "draw_gs.h"
  42
  43 #if HAVE_LLVM
  44 #include "gallivm/lp_bld_init.h"
  45 #include "draw_llvm.h"
  46
  47 static boolean
  48 draw_get_option_use_llvm(void)
  49 {
  50    static boolean first = TRUE;
  51    static boolean value;
  52    if (first) {
  53       first = FALSE;
  54       value = debug_get_bool_option("DRAW_USE_LLVM", TRUE);
  55
  56 #ifdef PIPE_ARCH_X86
  57       util_cpu_detect();
  58       /* require SSE2 due to LLVM PR6960. */
  59       if (!util_cpu_caps.has_sse2)
  60          value = FALSE;
  61 #endif
  62    }
  63    return value;
  64 }
  65 #endif
  66
  67
  68
  69 /**
  70  * Create new draw module context.
  71  */
  72 struct draw_context *
  73 draw_create(struct pipe_context *pipe)
  74 {
  75    return draw_create_gallivm(pipe, NULL);
  76 }
  77
  78
  79
  80 /**
  81  * Create new draw module context with gallivm state for LLVM JIT.
  82  */
  83 struct draw_context *
  84 draw_create_gallivm(struct pipe_context *pipe, struct gallivm_state *gallivm)
  85 {
  86    struct draw_context *draw = CALLOC_STRUCT( draw_context );
  87    if (draw == NULL)
  88       goto fail;
  89
  90 #if HAVE_LLVM
  91    if (draw_get_option_use_llvm()) {
  92       if (!gallivm) {
  93          gallivm = gallivm_create();
  94          draw->own_gallivm = gallivm;
  95       }
  96
  97       if (gallivm)
  98          draw->llvm = draw_llvm_create(draw, gallivm);
  99    }
 100 #endif
 101
 102    if (!draw_init(draw))
 103       goto fail;
 104
 105    draw->pipe = pipe;
 106
 107    return draw;
 108
 109 fail:
 110    draw_destroy( draw );
 111    return NULL;
 112 }
 113
 114
 115
 116 boolean draw_init(struct draw_context *draw)
 117 {
 118    /*
 119     * Note that several functions compute the clipmask of the predefined
 120     * formats with hardcoded formulas instead of using these. So modifications
 121     * here must be reflected there too.
 122     */
 123
 124    ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
 125    ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
 126    ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
 127    ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
 128    ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
 129    ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
 130    draw->nr_planes = 6;
 131    draw->clip_xy = TRUE;
 132    draw->clip_z = TRUE;
 133
 134
 135    draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */
 136
 137
 138    if (!draw_pipeline_init( draw ))
 139       return FALSE;
 140
 141    if (!draw_pt_init( draw ))
 142       return FALSE;
 143
 144    if (!draw_vs_init( draw ))
 145       return FALSE;
 146
 147    if (!draw_gs_init( draw ))
 148       return FALSE;
 149
 150    return TRUE;
 151 }
 152
 153
 154 void draw_destroy( struct draw_context *draw )
 155 {
 156    struct pipe_context *pipe;
 157    int i, j;
 158
 159    if (!draw)
 160       return;
 161
 162    pipe = draw->pipe;
 163
 164    /* free any rasterizer CSOs that we may have created.
 165     */
 166    for (i = 0; i < 2; i++) {
 167       for (j = 0; j < 2; j++) {
 168          if (draw->rasterizer_no_cull[i][j]) {
 169             pipe->delete_rasterizer_state(pipe, draw->rasterizer_no_cull[i][j]);
 170          }
 171       }
 172    }
 173
 174    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 175       pipe_resource_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
 176    }
 177
 178    /* Not so fast -- we're just borrowing this at the moment.
 179     *
 180    if (draw->render)
 181       draw->render->destroy( draw->render );
 182    */
 183
 184    draw_pipeline_destroy( draw );
 185    draw_pt_destroy( draw );
 186    draw_vs_destroy( draw );
 187    draw_gs_destroy( draw );
 188 #ifdef HAVE_LLVM
 189    if (draw->llvm)
 190       draw_llvm_destroy( draw->llvm );
 191
 192    if (draw->own_gallivm)
 193       gallivm_destroy(draw->own_gallivm);
 194 #endif
 195
 196    FREE( draw );
 197 }
 198
 199
 200
 201 void draw_flush( struct draw_context *draw )
 202 {
 203    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 204 }
 205
 206
 207 /**
 208  * Specify the Minimum Resolvable Depth factor for polygon offset.
 209  * This factor potentially depends on the number of Z buffer bits,
 210  * the rasterization algorithm and the arithmetic performed on Z
 211  * values between vertex shading and rasterization.  It will vary
 212  * from one driver to another.
 213  */
 214 void draw_set_mrd(struct draw_context *draw, double mrd)
 215 {
 216    draw->mrd = mrd;
 217 }
 218
 219
 220 static void update_clip_flags( struct draw_context *draw )
 221 {
 222    draw->clip_xy = !draw->driver.bypass_clip_xy;
 223    draw->guard_band_xy = (!draw->driver.bypass_clip_xy &&
 224                           draw->driver.guard_band_xy);
 225    draw->clip_z = (!draw->driver.bypass_clip_z &&
 226                    !draw->depth_clamp);
 227    draw->clip_user = (draw->nr_planes > 6);
 228 }
 229
 230 /**
 231  * Register new primitive rasterization/rendering state.
 232  * This causes the drawing pipeline to be rebuilt.
 233  */
 234 void draw_set_rasterizer_state( struct draw_context *draw,
 235                                 const struct pipe_rasterizer_state *raster,
 236                                 void *rast_handle )
 237 {
 238    if (!draw->suspend_flushing) {
 239       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 240
 241       draw->rasterizer = raster;
 242       draw->rast_handle = rast_handle;
 243
 244   }
 245 }
 246
 247 /* With a little more work, llvmpipe will be able to turn this off and
 248  * do its own x/y clipping.
 249  *
 250  * Some hardware can turn off clipping altogether - in particular any
 251  * hardware with a TNL unit can do its own clipping, even if it is
 252  * relying on the draw module for some other reason.
 253  */
 254 void draw_set_driver_clipping( struct draw_context *draw,
 255                                boolean bypass_clip_xy,
 256                                boolean bypass_clip_z,
 257                                boolean guard_band_xy)
 258 {
 259    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 260
 261    draw->driver.bypass_clip_xy = bypass_clip_xy;
 262    draw->driver.bypass_clip_z = bypass_clip_z;
 263    draw->driver.guard_band_xy = guard_band_xy;
 264    update_clip_flags(draw);
 265 }
 266
 267
 268 /**
 269  * Plug in the primitive rendering/rasterization stage (which is the last
 270  * stage in the drawing pipeline).
 271  * This is provided by the device driver.
 272  */
 273 void draw_set_rasterize_stage( struct draw_context *draw,
 274                                struct draw_stage *stage )
 275 {
 276    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 277
 278    draw->pipeline.rasterize = stage;
 279 }
 280
 281
 282 /**
 283  * Set the draw module's clipping state.
 284  */
 285 void draw_set_clip_state( struct draw_context *draw,
 286                           const struct pipe_clip_state *clip )
 287 {
 288    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 289
 290    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 291    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 292    draw->nr_planes = 6 + clip->nr;
 293    draw->depth_clamp = clip->depth_clamp;
 294
 295    update_clip_flags(draw);
 296 }
 297
 298
 299 /**
 300  * Set the draw module's viewport state.
 301  */
 302 void draw_set_viewport_state( struct draw_context *draw,
 303                               const struct pipe_viewport_state *viewport )
 304 {
 305    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 306    draw->viewport = *viewport; /* struct copy */
 307    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
 308                               viewport->scale[1] == 1.0f &&
 309                               viewport->scale[2] == 1.0f &&
 310                               viewport->scale[3] == 1.0f &&
 311                               viewport->translate[0] == 0.0f &&
 312                               viewport->translate[1] == 0.0f &&
 313                               viewport->translate[2] == 0.0f &&
 314                               viewport->translate[3] == 0.0f);
 315
 316    draw_vs_set_viewport( draw, viewport );
 317 }
 318
 319
 320
 321 void
 322 draw_set_vertex_buffers(struct draw_context *draw,
 323                         unsigned count,
 324                         const struct pipe_vertex_buffer *buffers)
 325 {
 326    assert(count <= PIPE_MAX_ATTRIBS);
 327
 328    util_copy_vertex_buffers(draw->pt.vertex_buffer,
 329                             &draw->pt.nr_vertex_buffers,
 330                             buffers, count);
 331 }
 332
 333
 334 void
 335 draw_set_vertex_elements(struct draw_context *draw,
 336                          unsigned count,
 337                          const struct pipe_vertex_element *elements)
 338 {
 339    assert(count <= PIPE_MAX_ATTRIBS);
 340
 341    memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
 342    draw->pt.nr_vertex_elements = count;
 343 }
 344
 345
 346 /**
 347  * Tell drawing context where to find mapped vertex buffers.
 348  */
 349 void
 350 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 351                               unsigned attr, const void *buffer)
 352 {
 353    draw->pt.user.vbuffer[attr] = buffer;
 354 }
 355
 356
 357 void
 358 draw_set_mapped_constant_buffer(struct draw_context *draw,
 359                                 unsigned shader_type,
 360                                 unsigned slot,
 361                                 const void *buffer,
 362                                 unsigned size )
 363 {
 364    debug_assert(shader_type == PIPE_SHADER_VERTEX ||
 365                 shader_type == PIPE_SHADER_GEOMETRY);
 366    debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
 367
 368    switch (shader_type) {
 369    case PIPE_SHADER_VERTEX:
 370       draw->pt.user.vs_constants[slot] = buffer;
 371       draw->pt.user.vs_constants_size[slot] = size;
 372       draw->pt.user.planes = (float (*) [DRAW_TOTAL_CLIP_PLANES][4]) &(draw->plane[0]);
 373       draw_vs_set_constants(draw, slot, buffer, size);
 374       break;
 375    case PIPE_SHADER_GEOMETRY:
 376       draw->pt.user.gs_constants[slot] = buffer;
 377       draw->pt.user.gs_constants_size[slot] = size;
 378       draw_gs_set_constants(draw, slot, buffer, size);
 379       break;
 380    default:
 381       assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
 382    }
 383 }
 384
 385
 386 /**
 387  * Tells the draw module to draw points with triangles if their size
 388  * is greater than this threshold.
 389  */
 390 void
 391 draw_wide_point_threshold(struct draw_context *draw, float threshold)
 392 {
 393    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 394    draw->pipeline.wide_point_threshold = threshold;
 395 }
 396
 397
 398 /**
 399  * Should the draw module handle point->quad conversion for drawing sprites?
 400  */
 401 void
 402 draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
 403 {
 404    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 405    draw->pipeline.wide_point_sprites = draw_sprite;
 406 }
 407
 408
 409 /**
 410  * Tells the draw module to draw lines with triangles if their width
 411  * is greater than this threshold.
 412  */
 413 void
 414 draw_wide_line_threshold(struct draw_context *draw, float threshold)
 415 {
 416    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 417    draw->pipeline.wide_line_threshold = roundf(threshold);
 418 }
 419
 420
 421 /**
 422  * Tells the draw module whether or not to implement line stipple.
 423  */
 424 void
 425 draw_enable_line_stipple(struct draw_context *draw, boolean enable)
 426 {
 427    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 428    draw->pipeline.line_stipple = enable;
 429 }
 430
 431
 432 /**
 433  * Tells draw module whether to convert points to quads for sprite mode.
 434  */
 435 void
 436 draw_enable_point_sprites(struct draw_context *draw, boolean enable)
 437 {
 438    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 439    draw->pipeline.point_sprite = enable;
 440 }
 441
 442
 443 void
 444 draw_set_force_passthrough( struct draw_context *draw, boolean enable )
 445 {
 446    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 447    draw->force_passthrough = enable;
 448 }
 449
 450
 451
 452 /**
 453  * Allocate an extra vertex/geometry shader vertex attribute, if it doesn't
 454  * exist already.
 455  *
 456  * This is used by some of the optional draw module stages such
 457  * as wide_point which may need to allocate additional generic/texcoord
 458  * attributes.
 459  */
 460 int
 461 draw_alloc_extra_vertex_attrib(struct draw_context *draw,
 462                                uint semantic_name, uint semantic_index)
 463 {
 464    int slot;
 465    uint num_outputs;
 466    uint n;
 467
 468    slot = draw_find_shader_output(draw, semantic_name, semantic_index);
 469    if (slot > 0) {
 470       return slot;
 471    }
 472
 473    num_outputs = draw_current_shader_outputs(draw);
 474    n = draw->extra_shader_outputs.num;
 475
 476    assert(n < Elements(draw->extra_shader_outputs.semantic_name));
 477
 478    draw->extra_shader_outputs.semantic_name[n] = semantic_name;
 479    draw->extra_shader_outputs.semantic_index[n] = semantic_index;
 480    draw->extra_shader_outputs.slot[n] = num_outputs + n;
 481    draw->extra_shader_outputs.num++;
 482
 483    return draw->extra_shader_outputs.slot[n];
 484 }
 485
 486
 487 /**
 488  * Remove all extra vertex attributes that were allocated with
 489  * draw_alloc_extra_vertex_attrib().
 490  */
 491 void
 492 draw_remove_extra_vertex_attribs(struct draw_context *draw)
 493 {
 494    draw->extra_shader_outputs.num = 0;
 495 }
 496
 497
 498 /**
 499  * If a geometry shader is present, return its info, else the vertex shader's
 500  * info.
 501  */
 502 struct tgsi_shader_info *
 503 draw_get_shader_info(const struct draw_context *draw)
 504 {
 505
 506    if (draw->gs.geometry_shader) {
 507       return &draw->gs.geometry_shader->info;
 508    } else {
 509       return &draw->vs.vertex_shader->info;
 510    }
 511 }
 512
 513
 514 /**
 515  * Ask the draw module for the location/slot of the given vertex attribute in
 516  * a post-transformed vertex.
 517  *
 518  * With this function, drivers that use the draw module should have no reason
 519  * to track the current vertex/geometry shader.
 520  *
 521  * Note that the draw module may sometimes generate vertices with extra
 522  * attributes (such as texcoords for AA lines).  The driver can call this
 523  * function to find those attributes.
 524  *
 525  * Zero is returned if the attribute is not found since this is
 526  * a don't care / undefined situtation.  Returning -1 would be a bit more
 527  * work for the drivers.
 528  */
 529 int
 530 draw_find_shader_output(const struct draw_context *draw,
 531                         uint semantic_name, uint semantic_index)
 532 {
 533    const struct tgsi_shader_info *info = draw_get_shader_info(draw);
 534    uint i;
 535
 536    for (i = 0; i < info->num_outputs; i++) {
 537       if (info->output_semantic_name[i] == semantic_name &&
 538           info->output_semantic_index[i] == semantic_index)
 539          return i;
 540    }
 541
 542    /* Search the extra vertex attributes */
 543    for (i = 0; i < draw->extra_shader_outputs.num; i++) {
 544       if (draw->extra_shader_outputs.semantic_name[i] == semantic_name &&
 545           draw->extra_shader_outputs.semantic_index[i] == semantic_index) {
 546          return draw->extra_shader_outputs.slot[i];
 547       }
 548    }
 549
 550    return 0;
 551 }
 552
 553
 554 /**
 555  * Return total number of the shader outputs.  This function is similar to
 556  * draw_current_shader_outputs() but this function also counts any extra
 557  * vertex/geometry output attributes that may be filled in by some draw
 558  * stages (such as AA point, AA line).
 559  *
 560  * If geometry shader is present, its output will be returned,
 561  * if not vertex shader is used.
 562  */
 563 uint
 564 draw_num_shader_outputs(const struct draw_context *draw)
 565 {
 566    const struct tgsi_shader_info *info = draw_get_shader_info(draw);
 567    uint count;
 568
 569    count = info->num_outputs;
 570    count += draw->extra_shader_outputs.num;
 571
 572    return count;
 573 }
 574
 575
 576 /**
 577  * Provide TGSI sampler objects for vertex/geometry shaders that use
 578  * texture fetches.
 579  * This might only be used by software drivers for the time being.
 580  */
 581 void
 582 draw_texture_samplers(struct draw_context *draw,
 583                       uint shader,
 584                       uint num_samplers,
 585                       struct tgsi_sampler **samplers)
 586 {
 587    if (shader == PIPE_SHADER_VERTEX) {
 588       draw->vs.num_samplers = num_samplers;
 589       draw->vs.samplers = samplers;
 590    } else {
 591       debug_assert(shader == PIPE_SHADER_GEOMETRY);
 592       draw->gs.num_samplers = num_samplers;
 593       draw->gs.samplers = samplers;
 594    }
 595 }
 596
 597
 598
 599
 600 void draw_set_render( struct draw_context *draw,
 601                       struct vbuf_render *render )
 602 {
 603    draw->render = render;
 604 }
 605
 606
 607 void
 608 draw_set_index_buffer(struct draw_context *draw,
 609                       const struct pipe_index_buffer *ib)
 610 {
 611    if (ib)
 612       memcpy(&draw->pt.index_buffer, ib, sizeof(draw->pt.index_buffer));
 613    else
 614       memset(&draw->pt.index_buffer, 0, sizeof(draw->pt.index_buffer));
 615 }
 616
 617
 618 /**
 619  * Tell drawing context where to find mapped index/element buffer.
 620  */
 621 void
 622 draw_set_mapped_index_buffer(struct draw_context *draw,
 623                              const void *elements)
 624 {
 625     draw->pt.user.elts = elements;
 626 }
 627
 628
 629 /* Revamp me please:
 630  */
 631 void draw_do_flush( struct draw_context *draw, unsigned flags )
 632 {
 633    if (!draw->suspend_flushing)
 634    {
 635       assert(!draw->flushing); /* catch inadvertant recursion */
 636
 637       draw->flushing = TRUE;
 638
 639       draw_pipeline_flush( draw, flags );
 640
 641       draw->reduced_prim = ~0; /* is reduced_prim needed any more? */
 642
 643       draw->flushing = FALSE;
 644    }
 645 }
 646
 647
 648 /**
 649  * Return the number of output attributes produced by the geometry
 650  * shader, if present.  If no geometry shader, return the number of
 651  * outputs from the vertex shader.
 652  * \sa draw_num_shader_outputs
 653  */
 654 uint
 655 draw_current_shader_outputs(const struct draw_context *draw)
 656 {
 657    if (draw->gs.geometry_shader)
 658       return draw->gs.num_gs_outputs;
 659    return draw->vs.num_vs_outputs;
 660 }
 661
 662
 663 /**
 664  * Return the index of the shader output which will contain the
 665  * vertex position.
 666  */
 667 uint
 668 draw_current_shader_position_output(const struct draw_context *draw)
 669 {
 670    if (draw->gs.geometry_shader)
 671       return draw->gs.position_output;
 672    return draw->vs.position_output;
 673 }
 674
 675
 676 /**
 677  * Return a pointer/handle for a driver/CSO rasterizer object which
 678  * disabled culling, stippling, unfilled tris, etc.
 679  * This is used by some pipeline stages (such as wide_point, aa_line
 680  * and aa_point) which convert points/lines into triangles.  In those
 681  * cases we don't want to accidentally cull the triangles.
 682  *
 683  * \param scissor  should the rasterizer state enable scissoring?
 684  * \param flatshade  should the rasterizer state use flat shading?
 685  * \return  rasterizer CSO handle
 686  */
 687 void *
 688 draw_get_rasterizer_no_cull( struct draw_context *draw,
 689                              boolean scissor,
 690                              boolean flatshade )
 691 {
 692    if (!draw->rasterizer_no_cull[scissor][flatshade]) {
 693       /* create now */
 694       struct pipe_context *pipe = draw->pipe;
 695       struct pipe_rasterizer_state rast;
 696
 697       memset(&rast, 0, sizeof(rast));
 698       rast.scissor = scissor;
 699       rast.flatshade = flatshade;
 700       rast.front_ccw = 1;
 701       rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
 702
 703       draw->rasterizer_no_cull[scissor][flatshade] =
 704          pipe->create_rasterizer_state(pipe, &rast);
 705    }
 706    return draw->rasterizer_no_cull[scissor][flatshade];
 707 }
 708
 709 void
 710 draw_set_mapped_so_buffers(struct draw_context *draw,
 711                            void *buffers[PIPE_MAX_SO_BUFFERS],
 712                            unsigned num_buffers)
 713 {
 714    int i;
 715
 716    for (i = 0; i < num_buffers; ++i) {
 717       draw->so.buffers[i] = buffers[i];
 718    }
 719    draw->so.num_buffers = num_buffers;
 720 }
 721
 722 void
 723 draw_set_so_state(struct draw_context *draw,
 724                   struct pipe_stream_output_state *state)
 725 {
 726    memcpy(&draw->so.state,
 727           state,
 728           sizeof(struct pipe_stream_output_state));
 729 }
 730
 731 void
 732 draw_set_sampler_views(struct draw_context *draw,
 733                        struct pipe_sampler_view **views,
 734                        unsigned num)
 735 {
 736    unsigned i;
 737
 738    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 739
 740    for (i = 0; i < num; ++i)
 741       draw->sampler_views[i] = views[i];
 742    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 743       draw->sampler_views[i] = NULL;
 744
 745    draw->num_sampler_views = num;
 746 }
 747
 748 void
 749 draw_set_samplers(struct draw_context *draw,
 750                   struct pipe_sampler_state **samplers,
 751                   unsigned num)
 752 {
 753    unsigned i;
 754
 755    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 756
 757    for (i = 0; i < num; ++i)
 758       draw->samplers[i] = samplers[i];
 759    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 760       draw->samplers[i] = NULL;
 761
 762    draw->num_samplers = num;
 763
 764 #ifdef HAVE_LLVM
 765    if (draw->llvm)
 766       draw_llvm_set_sampler_state(draw);
 767 #endif
 768 }
 769
 770 void
 771 draw_set_mapped_texture(struct draw_context *draw,
 772                         unsigned sampler_idx,
 773                         uint32_t width, uint32_t height, uint32_t depth,
 774                         uint32_t first_level, uint32_t last_level,
 775                         uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
 776                         uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
 777                         const void *data[PIPE_MAX_TEXTURE_LEVELS])
 778 {
 779 #ifdef HAVE_LLVM
 780    if(draw->llvm)
 781       draw_llvm_set_mapped_texture(draw,
 782                                 sampler_idx,
 783                                 width, height, depth, first_level, last_level,
 784                                 row_stride, img_stride, data);
 785 #endif
 786 }