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() && gallivm) {
  92       draw->llvm = draw_llvm_create(draw, gallivm);
  93    }
  94 #endif
  95
  96    if (!draw_init(draw))
  97       goto fail;
  98
  99    draw->pipe = pipe;
 100
 101    return draw;
 102
 103 fail:
 104    draw_destroy( draw );
 105    return NULL;
 106 }
 107
 108
 109
 110 boolean draw_init(struct draw_context *draw)
 111 {
 112    /*
 113     * Note that several functions compute the clipmask of the predefined
 114     * formats with hardcoded formulas instead of using these. So modifications
 115     * here must be reflected there too.
 116     */
 117
 118    ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
 119    ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
 120    ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
 121    ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
 122    ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
 123    ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
 124    draw->nr_planes = 6;
 125    draw->clip_xy = 1;
 126    draw->clip_z = 1;
 127
 128
 129    draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */
 130
 131
 132    if (!draw_pipeline_init( draw ))
 133       return FALSE;
 134
 135    if (!draw_pt_init( draw ))
 136       return FALSE;
 137
 138    if (!draw_vs_init( draw ))
 139       return FALSE;
 140
 141    if (!draw_gs_init( draw ))
 142       return FALSE;
 143
 144    return TRUE;
 145 }
 146
 147
 148 void draw_destroy( struct draw_context *draw )
 149 {
 150    struct pipe_context *pipe;
 151    int i, j;
 152
 153    if (!draw)
 154       return;
 155
 156    pipe = draw->pipe;
 157
 158    /* free any rasterizer CSOs that we may have created.
 159     */
 160    for (i = 0; i < 2; i++) {
 161       for (j = 0; j < 2; j++) {
 162          if (draw->rasterizer_no_cull[i][j]) {
 163             pipe->delete_rasterizer_state(pipe, draw->rasterizer_no_cull[i][j]);
 164          }
 165       }
 166    }
 167
 168    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 169       pipe_resource_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
 170    }
 171
 172    /* Not so fast -- we're just borrowing this at the moment.
 173     *
 174    if (draw->render)
 175       draw->render->destroy( draw->render );
 176    */
 177
 178    draw_pipeline_destroy( draw );
 179    draw_pt_destroy( draw );
 180    draw_vs_destroy( draw );
 181    draw_gs_destroy( draw );
 182 #ifdef HAVE_LLVM
 183    if(draw->llvm)
 184       draw_llvm_destroy( draw->llvm );
 185 #endif
 186
 187    FREE( draw );
 188 }
 189
 190
 191
 192 void draw_flush( struct draw_context *draw )
 193 {
 194    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 195 }
 196
 197
 198 /**
 199  * Specify the Minimum Resolvable Depth factor for polygon offset.
 200  * This factor potentially depends on the number of Z buffer bits,
 201  * the rasterization algorithm and the arithmetic performed on Z
 202  * values between vertex shading and rasterization.  It will vary
 203  * from one driver to another.
 204  */
 205 void draw_set_mrd(struct draw_context *draw, double mrd)
 206 {
 207    draw->mrd = mrd;
 208 }
 209
 210
 211 static void update_clip_flags( struct draw_context *draw )
 212 {
 213    draw->clip_xy = !draw->driver.bypass_clip_xy;
 214    draw->clip_z = (!draw->driver.bypass_clip_z &&
 215                    !draw->depth_clamp);
 216    draw->clip_user = (draw->nr_planes > 6);
 217 }
 218
 219 /**
 220  * Register new primitive rasterization/rendering state.
 221  * This causes the drawing pipeline to be rebuilt.
 222  */
 223 void draw_set_rasterizer_state( struct draw_context *draw,
 224                                 const struct pipe_rasterizer_state *raster,
 225                                 void *rast_handle )
 226 {
 227    if (!draw->suspend_flushing) {
 228       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 229
 230       draw->rasterizer = raster;
 231       draw->rast_handle = rast_handle;
 232
 233   }
 234 }
 235
 236 /* With a little more work, llvmpipe will be able to turn this off and
 237  * do its own x/y clipping.
 238  *
 239  * Some hardware can turn off clipping altogether - in particular any
 240  * hardware with a TNL unit can do its own clipping, even if it is
 241  * relying on the draw module for some other reason.
 242  */
 243 void draw_set_driver_clipping( struct draw_context *draw,
 244                                boolean bypass_clip_xy,
 245                                boolean bypass_clip_z )
 246 {
 247    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 248
 249    draw->driver.bypass_clip_xy = bypass_clip_xy;
 250    draw->driver.bypass_clip_z = bypass_clip_z;
 251    update_clip_flags(draw);
 252 }
 253
 254
 255 /**
 256  * Plug in the primitive rendering/rasterization stage (which is the last
 257  * stage in the drawing pipeline).
 258  * This is provided by the device driver.
 259  */
 260 void draw_set_rasterize_stage( struct draw_context *draw,
 261                                struct draw_stage *stage )
 262 {
 263    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 264
 265    draw->pipeline.rasterize = stage;
 266 }
 267
 268
 269 /**
 270  * Set the draw module's clipping state.
 271  */
 272 void draw_set_clip_state( struct draw_context *draw,
 273                           const struct pipe_clip_state *clip )
 274 {
 275    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 276
 277    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 278    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 279    draw->nr_planes = 6 + clip->nr;
 280    draw->depth_clamp = clip->depth_clamp;
 281
 282    update_clip_flags(draw);
 283 }
 284
 285
 286 /**
 287  * Set the draw module's viewport state.
 288  */
 289 void draw_set_viewport_state( struct draw_context *draw,
 290                               const struct pipe_viewport_state *viewport )
 291 {
 292    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 293    draw->viewport = *viewport; /* struct copy */
 294    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
 295                               viewport->scale[1] == 1.0f &&
 296                               viewport->scale[2] == 1.0f &&
 297                               viewport->scale[3] == 1.0f &&
 298                               viewport->translate[0] == 0.0f &&
 299                               viewport->translate[1] == 0.0f &&
 300                               viewport->translate[2] == 0.0f &&
 301                               viewport->translate[3] == 0.0f);
 302
 303    draw_vs_set_viewport( draw, viewport );
 304 }
 305
 306
 307
 308 void
 309 draw_set_vertex_buffers(struct draw_context *draw,
 310                         unsigned count,
 311                         const struct pipe_vertex_buffer *buffers)
 312 {
 313    assert(count <= PIPE_MAX_ATTRIBS);
 314
 315    util_copy_vertex_buffers(draw->pt.vertex_buffer,
 316                             &draw->pt.nr_vertex_buffers,
 317                             buffers, count);
 318 }
 319
 320
 321 void
 322 draw_set_vertex_elements(struct draw_context *draw,
 323                          unsigned count,
 324                          const struct pipe_vertex_element *elements)
 325 {
 326    assert(count <= PIPE_MAX_ATTRIBS);
 327
 328    memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
 329    draw->pt.nr_vertex_elements = count;
 330 }
 331
 332
 333 /**
 334  * Tell drawing context where to find mapped vertex buffers.
 335  */
 336 void
 337 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 338                               unsigned attr, const void *buffer)
 339 {
 340    draw->pt.user.vbuffer[attr] = buffer;
 341 }
 342
 343
 344 void
 345 draw_set_mapped_constant_buffer(struct draw_context *draw,
 346                                 unsigned shader_type,
 347                                 unsigned slot,
 348                                 const void *buffer,
 349                                 unsigned size )
 350 {
 351    debug_assert(shader_type == PIPE_SHADER_VERTEX ||
 352                 shader_type == PIPE_SHADER_GEOMETRY);
 353    debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
 354
 355    switch (shader_type) {
 356    case PIPE_SHADER_VERTEX:
 357       draw->pt.user.vs_constants[slot] = buffer;
 358       draw->pt.user.vs_constants_size[slot] = size;
 359       draw->pt.user.planes = (float (*) [12][4]) &(draw->plane[0]);
 360       draw_vs_set_constants(draw, slot, buffer, size);
 361       break;
 362    case PIPE_SHADER_GEOMETRY:
 363       draw->pt.user.gs_constants[slot] = buffer;
 364       draw->pt.user.gs_constants_size[slot] = size;
 365       draw_gs_set_constants(draw, slot, buffer, size);
 366       break;
 367    default:
 368       assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
 369    }
 370 }
 371
 372
 373 /**
 374  * Tells the draw module to draw points with triangles if their size
 375  * is greater than this threshold.
 376  */
 377 void
 378 draw_wide_point_threshold(struct draw_context *draw, float threshold)
 379 {
 380    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 381    draw->pipeline.wide_point_threshold = threshold;
 382 }
 383
 384
 385 /**
 386  * Should the draw module handle point->quad conversion for drawing sprites?
 387  */
 388 void
 389 draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
 390 {
 391    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 392    draw->pipeline.wide_point_sprites = draw_sprite;
 393 }
 394
 395
 396 /**
 397  * Tells the draw module to draw lines with triangles if their width
 398  * is greater than this threshold.
 399  */
 400 void
 401 draw_wide_line_threshold(struct draw_context *draw, float threshold)
 402 {
 403    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 404    draw->pipeline.wide_line_threshold = threshold;
 405 }
 406
 407
 408 /**
 409  * Tells the draw module whether or not to implement line stipple.
 410  */
 411 void
 412 draw_enable_line_stipple(struct draw_context *draw, boolean enable)
 413 {
 414    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 415    draw->pipeline.line_stipple = enable;
 416 }
 417
 418
 419 /**
 420  * Tells draw module whether to convert points to quads for sprite mode.
 421  */
 422 void
 423 draw_enable_point_sprites(struct draw_context *draw, boolean enable)
 424 {
 425    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 426    draw->pipeline.point_sprite = enable;
 427 }
 428
 429
 430 void
 431 draw_set_force_passthrough( struct draw_context *draw, boolean enable )
 432 {
 433    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 434    draw->force_passthrough = enable;
 435 }
 436
 437
 438
 439 /**
 440  * Allocate an extra vertex/geometry shader vertex attribute.
 441  * This is used by some of the optional draw module stages such
 442  * as wide_point which may need to allocate additional generic/texcoord
 443  * attributes.
 444  */
 445 int
 446 draw_alloc_extra_vertex_attrib(struct draw_context *draw,
 447                                uint semantic_name, uint semantic_index)
 448 {
 449    const int num_outputs = draw_current_shader_outputs(draw);
 450    const int n = draw->extra_shader_outputs.num;
 451
 452    assert(n < Elements(draw->extra_shader_outputs.semantic_name));
 453
 454    draw->extra_shader_outputs.semantic_name[n] = semantic_name;
 455    draw->extra_shader_outputs.semantic_index[n] = semantic_index;
 456    draw->extra_shader_outputs.slot[n] = num_outputs + n;
 457    draw->extra_shader_outputs.num++;
 458
 459    return draw->extra_shader_outputs.slot[n];
 460 }
 461
 462
 463 /**
 464  * Remove all extra vertex attributes that were allocated with
 465  * draw_alloc_extra_vertex_attrib().
 466  */
 467 void
 468 draw_remove_extra_vertex_attribs(struct draw_context *draw)
 469 {
 470    draw->extra_shader_outputs.num = 0;
 471 }
 472
 473
 474 /**
 475  * Ask the draw module for the location/slot of the given vertex attribute in
 476  * a post-transformed vertex.
 477  *
 478  * With this function, drivers that use the draw module should have no reason
 479  * to track the current vertex/geometry shader.
 480  *
 481  * Note that the draw module may sometimes generate vertices with extra
 482  * attributes (such as texcoords for AA lines).  The driver can call this
 483  * function to find those attributes.
 484  *
 485  * Zero is returned if the attribute is not found since this is
 486  * a don't care / undefined situtation.  Returning -1 would be a bit more
 487  * work for the drivers.
 488  */
 489 int
 490 draw_find_shader_output(const struct draw_context *draw,
 491                         uint semantic_name, uint semantic_index)
 492 {
 493    const struct draw_vertex_shader *vs = draw->vs.vertex_shader;
 494    const struct draw_geometry_shader *gs = draw->gs.geometry_shader;
 495    uint i;
 496    const struct tgsi_shader_info *info = &vs->info;
 497
 498    if (gs)
 499       info = &gs->info;
 500
 501    for (i = 0; i < info->num_outputs; i++) {
 502       if (info->output_semantic_name[i] == semantic_name &&
 503           info->output_semantic_index[i] == semantic_index)
 504          return i;
 505    }
 506
 507    /* Search the extra vertex attributes */
 508    for (i = 0; i < draw->extra_shader_outputs.num; i++) {
 509       if (draw->extra_shader_outputs.semantic_name[i] == semantic_name &&
 510           draw->extra_shader_outputs.semantic_index[i] == semantic_index) {
 511          return draw->extra_shader_outputs.slot[i];
 512       }
 513    }
 514
 515    return 0;
 516 }
 517
 518
 519 /**
 520  * Return total number of the shader outputs.  This function is similar to
 521  * draw_current_shader_outputs() but this function also counts any extra
 522  * vertex/geometry output attributes that may be filled in by some draw
 523  * stages (such as AA point, AA line).
 524  *
 525  * If geometry shader is present, its output will be returned,
 526  * if not vertex shader is used.
 527  */
 528 uint
 529 draw_num_shader_outputs(const struct draw_context *draw)
 530 {
 531    uint count;
 532
 533    /* If a geometry shader is present, its outputs go to the
 534     * driver, else the vertex shader's outputs.
 535     */
 536    if (draw->gs.geometry_shader)
 537       count = draw->gs.geometry_shader->info.num_outputs;
 538    else
 539       count = draw->vs.vertex_shader->info.num_outputs;
 540
 541    count += draw->extra_shader_outputs.num;
 542
 543    return count;
 544 }
 545
 546
 547 /**
 548  * Provide TGSI sampler objects for vertex/geometry shaders that use
 549  * texture fetches.
 550  * This might only be used by software drivers for the time being.
 551  */
 552 void
 553 draw_texture_samplers(struct draw_context *draw,
 554                       uint shader,
 555                       uint num_samplers,
 556                       struct tgsi_sampler **samplers)
 557 {
 558    if (shader == PIPE_SHADER_VERTEX) {
 559       draw->vs.num_samplers = num_samplers;
 560       draw->vs.samplers = samplers;
 561    } else {
 562       debug_assert(shader == PIPE_SHADER_GEOMETRY);
 563       draw->gs.num_samplers = num_samplers;
 564       draw->gs.samplers = samplers;
 565    }
 566 }
 567
 568
 569
 570
 571 void draw_set_render( struct draw_context *draw,
 572                       struct vbuf_render *render )
 573 {
 574    draw->render = render;
 575 }
 576
 577
 578 void
 579 draw_set_index_buffer(struct draw_context *draw,
 580                       const struct pipe_index_buffer *ib)
 581 {
 582    if (ib)
 583       memcpy(&draw->pt.index_buffer, ib, sizeof(draw->pt.index_buffer));
 584    else
 585       memset(&draw->pt.index_buffer, 0, sizeof(draw->pt.index_buffer));
 586 }
 587
 588
 589 /**
 590  * Tell drawing context where to find mapped index/element buffer.
 591  */
 592 void
 593 draw_set_mapped_index_buffer(struct draw_context *draw,
 594                              const void *elements)
 595 {
 596     draw->pt.user.elts = elements;
 597 }
 598
 599
 600 /* Revamp me please:
 601  */
 602 void draw_do_flush( struct draw_context *draw, unsigned flags )
 603 {
 604    if (!draw->suspend_flushing)
 605    {
 606       assert(!draw->flushing); /* catch inadvertant recursion */
 607
 608       draw->flushing = TRUE;
 609
 610       draw_pipeline_flush( draw, flags );
 611
 612       draw->reduced_prim = ~0; /* is reduced_prim needed any more? */
 613
 614       draw->flushing = FALSE;
 615    }
 616 }
 617
 618
 619 /**
 620  * Return the number of output attributes produced by the geometry
 621  * shader, if present.  If no geometry shader, return the number of
 622  * outputs from the vertex shader.
 623  * \sa draw_num_shader_outputs
 624  */
 625 uint
 626 draw_current_shader_outputs(const struct draw_context *draw)
 627 {
 628    if (draw->gs.geometry_shader)
 629       return draw->gs.num_gs_outputs;
 630    return draw->vs.num_vs_outputs;
 631 }
 632
 633
 634 /**
 635  * Return the index of the shader output which will contain the
 636  * vertex position.
 637  */
 638 uint
 639 draw_current_shader_position_output(const struct draw_context *draw)
 640 {
 641    if (draw->gs.geometry_shader)
 642       return draw->gs.position_output;
 643    return draw->vs.position_output;
 644 }
 645
 646
 647 /**
 648  * Return a pointer/handle for a driver/CSO rasterizer object which
 649  * disabled culling, stippling, unfilled tris, etc.
 650  * This is used by some pipeline stages (such as wide_point, aa_line
 651  * and aa_point) which convert points/lines into triangles.  In those
 652  * cases we don't want to accidentally cull the triangles.
 653  *
 654  * \param scissor  should the rasterizer state enable scissoring?
 655  * \param flatshade  should the rasterizer state use flat shading?
 656  * \return  rasterizer CSO handle
 657  */
 658 void *
 659 draw_get_rasterizer_no_cull( struct draw_context *draw,
 660                              boolean scissor,
 661                              boolean flatshade )
 662 {
 663    if (!draw->rasterizer_no_cull[scissor][flatshade]) {
 664       /* create now */
 665       struct pipe_context *pipe = draw->pipe;
 666       struct pipe_rasterizer_state rast;
 667
 668       memset(&rast, 0, sizeof(rast));
 669       rast.scissor = scissor;
 670       rast.flatshade = flatshade;
 671       rast.front_ccw = 1;
 672       rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
 673
 674       draw->rasterizer_no_cull[scissor][flatshade] =
 675          pipe->create_rasterizer_state(pipe, &rast);
 676    }
 677    return draw->rasterizer_no_cull[scissor][flatshade];
 678 }
 679
 680 void
 681 draw_set_mapped_so_buffers(struct draw_context *draw,
 682                            void *buffers[PIPE_MAX_SO_BUFFERS],
 683                            unsigned num_buffers)
 684 {
 685    int i;
 686
 687    for (i = 0; i < num_buffers; ++i) {
 688       draw->so.buffers[i] = buffers[i];
 689    }
 690    draw->so.num_buffers = num_buffers;
 691 }
 692
 693 void
 694 draw_set_so_state(struct draw_context *draw,
 695                   struct pipe_stream_output_state *state)
 696 {
 697    memcpy(&draw->so.state,
 698           state,
 699           sizeof(struct pipe_stream_output_state));
 700 }
 701
 702 void
 703 draw_set_sampler_views(struct draw_context *draw,
 704                        struct pipe_sampler_view **views,
 705                        unsigned num)
 706 {
 707    unsigned i;
 708
 709    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 710
 711    for (i = 0; i < num; ++i)
 712       draw->sampler_views[i] = views[i];
 713    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 714       draw->sampler_views[i] = NULL;
 715
 716    draw->num_sampler_views = num;
 717 }
 718
 719 void
 720 draw_set_samplers(struct draw_context *draw,
 721                   struct pipe_sampler_state **samplers,
 722                   unsigned num)
 723 {
 724    unsigned i;
 725
 726    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 727
 728    for (i = 0; i < num; ++i)
 729       draw->samplers[i] = samplers[i];
 730    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 731       draw->samplers[i] = NULL;
 732
 733    draw->num_samplers = num;
 734
 735 #ifdef HAVE_LLVM
 736    if (draw->llvm)
 737       draw_llvm_set_sampler_state(draw);
 738 #endif
 739 }
 740
 741 void
 742 draw_set_mapped_texture(struct draw_context *draw,
 743                         unsigned sampler_idx,
 744                         uint32_t width, uint32_t height, uint32_t depth,
 745                         uint32_t last_level,
 746                         uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
 747                         uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
 748                         const void *data[PIPE_MAX_TEXTURE_LEVELS])
 749 {
 750 #ifdef HAVE_LLVM
 751    if(draw->llvm)
 752       draw_llvm_set_mapped_texture(draw,
 753                                 sampler_idx,
 754                                 width, height, depth, last_level,
 755                                 row_stride, img_stride, data);
 756 #endif
 757 }