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    draw->pt.user.planes = (float (*) [DRAW_TOTAL_CLIP_PLANES][4]) &(draw->plane[0]);
 296
 297    update_clip_flags(draw);
 298 }
 299
 300
 301 /**
 302  * Set the draw module's viewport state.
 303  */
 304 void draw_set_viewport_state( struct draw_context *draw,
 305                               const struct pipe_viewport_state *viewport )
 306 {
 307    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 308    draw->viewport = *viewport; /* struct copy */
 309    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
 310                               viewport->scale[1] == 1.0f &&
 311                               viewport->scale[2] == 1.0f &&
 312                               viewport->scale[3] == 1.0f &&
 313                               viewport->translate[0] == 0.0f &&
 314                               viewport->translate[1] == 0.0f &&
 315                               viewport->translate[2] == 0.0f &&
 316                               viewport->translate[3] == 0.0f);
 317
 318    draw_vs_set_viewport( draw, viewport );
 319 }
 320
 321
 322
 323 void
 324 draw_set_vertex_buffers(struct draw_context *draw,
 325                         unsigned count,
 326                         const struct pipe_vertex_buffer *buffers)
 327 {
 328    assert(count <= PIPE_MAX_ATTRIBS);
 329
 330    util_copy_vertex_buffers(draw->pt.vertex_buffer,
 331                             &draw->pt.nr_vertex_buffers,
 332                             buffers, count);
 333 }
 334
 335
 336 void
 337 draw_set_vertex_elements(struct draw_context *draw,
 338                          unsigned count,
 339                          const struct pipe_vertex_element *elements)
 340 {
 341    assert(count <= PIPE_MAX_ATTRIBS);
 342
 343    memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
 344    draw->pt.nr_vertex_elements = count;
 345 }
 346
 347
 348 /**
 349  * Tell drawing context where to find mapped vertex buffers.
 350  */
 351 void
 352 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 353                               unsigned attr, const void *buffer)
 354 {
 355    draw->pt.user.vbuffer[attr] = buffer;
 356 }
 357
 358
 359 void
 360 draw_set_mapped_constant_buffer(struct draw_context *draw,
 361                                 unsigned shader_type,
 362                                 unsigned slot,
 363                                 const void *buffer,
 364                                 unsigned size )
 365 {
 366    debug_assert(shader_type == PIPE_SHADER_VERTEX ||
 367                 shader_type == PIPE_SHADER_GEOMETRY);
 368    debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
 369
 370    switch (shader_type) {
 371    case PIPE_SHADER_VERTEX:
 372       draw->pt.user.vs_constants[slot] = buffer;
 373       draw->pt.user.vs_constants_size[slot] = size;
 374       draw_vs_set_constants(draw, slot, buffer, size);
 375       break;
 376    case PIPE_SHADER_GEOMETRY:
 377       draw->pt.user.gs_constants[slot] = buffer;
 378       draw->pt.user.gs_constants_size[slot] = size;
 379       draw_gs_set_constants(draw, slot, buffer, size);
 380       break;
 381    default:
 382       assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
 383    }
 384 }
 385
 386
 387 /**
 388  * Tells the draw module to draw points with triangles if their size
 389  * is greater than this threshold.
 390  */
 391 void
 392 draw_wide_point_threshold(struct draw_context *draw, float threshold)
 393 {
 394    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 395    draw->pipeline.wide_point_threshold = threshold;
 396 }
 397
 398
 399 /**
 400  * Should the draw module handle point->quad conversion for drawing sprites?
 401  */
 402 void
 403 draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
 404 {
 405    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 406    draw->pipeline.wide_point_sprites = draw_sprite;
 407 }
 408
 409
 410 /**
 411  * Tells the draw module to draw lines with triangles if their width
 412  * is greater than this threshold.
 413  */
 414 void
 415 draw_wide_line_threshold(struct draw_context *draw, float threshold)
 416 {
 417    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 418    draw->pipeline.wide_line_threshold = roundf(threshold);
 419 }
 420
 421
 422 /**
 423  * Tells the draw module whether or not to implement line stipple.
 424  */
 425 void
 426 draw_enable_line_stipple(struct draw_context *draw, boolean enable)
 427 {
 428    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 429    draw->pipeline.line_stipple = enable;
 430 }
 431
 432
 433 /**
 434  * Tells draw module whether to convert points to quads for sprite mode.
 435  */
 436 void
 437 draw_enable_point_sprites(struct draw_context *draw, boolean enable)
 438 {
 439    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 440    draw->pipeline.point_sprite = enable;
 441 }
 442
 443
 444 void
 445 draw_set_force_passthrough( struct draw_context *draw, boolean enable )
 446 {
 447    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 448    draw->force_passthrough = enable;
 449 }
 450
 451
 452
 453 /**
 454  * Allocate an extra vertex/geometry shader vertex attribute, if it doesn't
 455  * exist already.
 456  *
 457  * This is used by some of the optional draw module stages such
 458  * as wide_point which may need to allocate additional generic/texcoord
 459  * attributes.
 460  */
 461 int
 462 draw_alloc_extra_vertex_attrib(struct draw_context *draw,
 463                                uint semantic_name, uint semantic_index)
 464 {
 465    int slot;
 466    uint num_outputs;
 467    uint n;
 468
 469    slot = draw_find_shader_output(draw, semantic_name, semantic_index);
 470    if (slot > 0) {
 471       return slot;
 472    }
 473
 474    num_outputs = draw_current_shader_outputs(draw);
 475    n = draw->extra_shader_outputs.num;
 476
 477    assert(n < Elements(draw->extra_shader_outputs.semantic_name));
 478
 479    draw->extra_shader_outputs.semantic_name[n] = semantic_name;
 480    draw->extra_shader_outputs.semantic_index[n] = semantic_index;
 481    draw->extra_shader_outputs.slot[n] = num_outputs + n;
 482    draw->extra_shader_outputs.num++;
 483
 484    return draw->extra_shader_outputs.slot[n];
 485 }
 486
 487
 488 /**
 489  * Remove all extra vertex attributes that were allocated with
 490  * draw_alloc_extra_vertex_attrib().
 491  */
 492 void
 493 draw_remove_extra_vertex_attribs(struct draw_context *draw)
 494 {
 495    draw->extra_shader_outputs.num = 0;
 496 }
 497
 498
 499 /**
 500  * If a geometry shader is present, return its info, else the vertex shader's
 501  * info.
 502  */
 503 struct tgsi_shader_info *
 504 draw_get_shader_info(const struct draw_context *draw)
 505 {
 506
 507    if (draw->gs.geometry_shader) {
 508       return &draw->gs.geometry_shader->info;
 509    } else {
 510       return &draw->vs.vertex_shader->info;
 511    }
 512 }
 513
 514
 515 /**
 516  * Ask the draw module for the location/slot of the given vertex attribute in
 517  * a post-transformed vertex.
 518  *
 519  * With this function, drivers that use the draw module should have no reason
 520  * to track the current vertex/geometry shader.
 521  *
 522  * Note that the draw module may sometimes generate vertices with extra
 523  * attributes (such as texcoords for AA lines).  The driver can call this
 524  * function to find those attributes.
 525  *
 526  * Zero is returned if the attribute is not found since this is
 527  * a don't care / undefined situtation.  Returning -1 would be a bit more
 528  * work for the drivers.
 529  */
 530 int
 531 draw_find_shader_output(const struct draw_context *draw,
 532                         uint semantic_name, uint semantic_index)
 533 {
 534    const struct tgsi_shader_info *info = draw_get_shader_info(draw);
 535    uint i;
 536
 537    for (i = 0; i < info->num_outputs; i++) {
 538       if (info->output_semantic_name[i] == semantic_name &&
 539           info->output_semantic_index[i] == semantic_index)
 540          return i;
 541    }
 542
 543    /* Search the extra vertex attributes */
 544    for (i = 0; i < draw->extra_shader_outputs.num; i++) {
 545       if (draw->extra_shader_outputs.semantic_name[i] == semantic_name &&
 546           draw->extra_shader_outputs.semantic_index[i] == semantic_index) {
 547          return draw->extra_shader_outputs.slot[i];
 548       }
 549    }
 550
 551    return 0;
 552 }
 553
 554
 555 /**
 556  * Return total number of the shader outputs.  This function is similar to
 557  * draw_current_shader_outputs() but this function also counts any extra
 558  * vertex/geometry output attributes that may be filled in by some draw
 559  * stages (such as AA point, AA line).
 560  *
 561  * If geometry shader is present, its output will be returned,
 562  * if not vertex shader is used.
 563  */
 564 uint
 565 draw_num_shader_outputs(const struct draw_context *draw)
 566 {
 567    const struct tgsi_shader_info *info = draw_get_shader_info(draw);
 568    uint count;
 569
 570    count = info->num_outputs;
 571    count += draw->extra_shader_outputs.num;
 572
 573    return count;
 574 }
 575
 576
 577 /**
 578  * Provide TGSI sampler objects for vertex/geometry shaders that use
 579  * texture fetches.
 580  * This might only be used by software drivers for the time being.
 581  */
 582 void
 583 draw_texture_samplers(struct draw_context *draw,
 584                       uint shader,
 585                       uint num_samplers,
 586                       struct tgsi_sampler **samplers)
 587 {
 588    if (shader == PIPE_SHADER_VERTEX) {
 589       draw->vs.num_samplers = num_samplers;
 590       draw->vs.samplers = samplers;
 591    } else {
 592       debug_assert(shader == PIPE_SHADER_GEOMETRY);
 593       draw->gs.num_samplers = num_samplers;
 594       draw->gs.samplers = samplers;
 595    }
 596 }
 597
 598
 599
 600
 601 void draw_set_render( struct draw_context *draw,
 602                       struct vbuf_render *render )
 603 {
 604    draw->render = render;
 605 }
 606
 607
 608 void
 609 draw_set_index_buffer(struct draw_context *draw,
 610                       const struct pipe_index_buffer *ib)
 611 {
 612    if (ib)
 613       memcpy(&draw->pt.index_buffer, ib, sizeof(draw->pt.index_buffer));
 614    else
 615       memset(&draw->pt.index_buffer, 0, sizeof(draw->pt.index_buffer));
 616 }
 617
 618
 619 /**
 620  * Tell drawing context where to find mapped index/element buffer.
 621  */
 622 void
 623 draw_set_mapped_index_buffer(struct draw_context *draw,
 624                              const void *elements)
 625 {
 626     draw->pt.user.elts = elements;
 627 }
 628
 629
 630 /* Revamp me please:
 631  */
 632 void draw_do_flush( struct draw_context *draw, unsigned flags )
 633 {
 634    if (!draw->suspend_flushing)
 635    {
 636       assert(!draw->flushing); /* catch inadvertant recursion */
 637
 638       draw->flushing = TRUE;
 639
 640       draw_pipeline_flush( draw, flags );
 641
 642       draw->reduced_prim = ~0; /* is reduced_prim needed any more? */
 643
 644       draw->flushing = FALSE;
 645    }
 646 }
 647
 648
 649 /**
 650  * Return the number of output attributes produced by the geometry
 651  * shader, if present.  If no geometry shader, return the number of
 652  * outputs from the vertex shader.
 653  * \sa draw_num_shader_outputs
 654  */
 655 uint
 656 draw_current_shader_outputs(const struct draw_context *draw)
 657 {
 658    if (draw->gs.geometry_shader)
 659       return draw->gs.num_gs_outputs;
 660    return draw->vs.num_vs_outputs;
 661 }
 662
 663
 664 /**
 665  * Return the index of the shader output which will contain the
 666  * vertex position.
 667  */
 668 uint
 669 draw_current_shader_position_output(const struct draw_context *draw)
 670 {
 671    if (draw->gs.geometry_shader)
 672       return draw->gs.position_output;
 673    return draw->vs.position_output;
 674 }
 675
 676
 677 /**
 678  * Return a pointer/handle for a driver/CSO rasterizer object which
 679  * disabled culling, stippling, unfilled tris, etc.
 680  * This is used by some pipeline stages (such as wide_point, aa_line
 681  * and aa_point) which convert points/lines into triangles.  In those
 682  * cases we don't want to accidentally cull the triangles.
 683  *
 684  * \param scissor  should the rasterizer state enable scissoring?
 685  * \param flatshade  should the rasterizer state use flat shading?
 686  * \return  rasterizer CSO handle
 687  */
 688 void *
 689 draw_get_rasterizer_no_cull( struct draw_context *draw,
 690                              boolean scissor,
 691                              boolean flatshade )
 692 {
 693    if (!draw->rasterizer_no_cull[scissor][flatshade]) {
 694       /* create now */
 695       struct pipe_context *pipe = draw->pipe;
 696       struct pipe_rasterizer_state rast;
 697
 698       memset(&rast, 0, sizeof(rast));
 699       rast.scissor = scissor;
 700       rast.flatshade = flatshade;
 701       rast.front_ccw = 1;
 702       rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
 703
 704       draw->rasterizer_no_cull[scissor][flatshade] =
 705          pipe->create_rasterizer_state(pipe, &rast);
 706    }
 707    return draw->rasterizer_no_cull[scissor][flatshade];
 708 }
 709
 710 void
 711 draw_set_mapped_so_buffers(struct draw_context *draw,
 712                            void *buffers[PIPE_MAX_SO_BUFFERS],
 713                            unsigned num_buffers)
 714 {
 715    int i;
 716
 717    for (i = 0; i < num_buffers; ++i) {
 718       draw->so.buffers[i] = buffers[i];
 719    }
 720    draw->so.num_buffers = num_buffers;
 721 }
 722
 723 void
 724 draw_set_so_state(struct draw_context *draw,
 725                   struct pipe_stream_output_info *state)
 726 {
 727    memcpy(&draw->so.state,
 728           state,
 729           sizeof(struct pipe_stream_output_info));
 730 }
 731
 732 void
 733 draw_set_sampler_views(struct draw_context *draw,
 734                        struct pipe_sampler_view **views,
 735                        unsigned num)
 736 {
 737    unsigned i;
 738
 739    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 740
 741    for (i = 0; i < num; ++i)
 742       draw->sampler_views[i] = views[i];
 743    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 744       draw->sampler_views[i] = NULL;
 745
 746    draw->num_sampler_views = num;
 747 }
 748
 749 void
 750 draw_set_samplers(struct draw_context *draw,
 751                   struct pipe_sampler_state **samplers,
 752                   unsigned num)
 753 {
 754    unsigned i;
 755
 756    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 757
 758    for (i = 0; i < num; ++i)
 759       draw->samplers[i] = samplers[i];
 760    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 761       draw->samplers[i] = NULL;
 762
 763    draw->num_samplers = num;
 764
 765 #ifdef HAVE_LLVM
 766    if (draw->llvm)
 767       draw_llvm_set_sampler_state(draw);
 768 #endif
 769 }
 770
 771 void
 772 draw_set_mapped_texture(struct draw_context *draw,
 773                         unsigned sampler_idx,
 774                         uint32_t width, uint32_t height, uint32_t depth,
 775                         uint32_t first_level, uint32_t last_level,
 776                         uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
 777                         uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
 778                         const void *data[PIPE_MAX_TEXTURE_LEVELS])
 779 {
 780 #ifdef HAVE_LLVM
 781    if(draw->llvm)
 782       draw_llvm_set_mapped_texture(draw,
 783                                 sampler_idx,
 784                                 width, height, depth, first_level, last_level,
 785                                 row_stride, img_stride, data);
 786 #endif
 787 }