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->clip_z = (!draw->driver.bypass_clip_z &&
 224                    !draw->depth_clamp);
 225    draw->clip_user = (draw->nr_planes > 6);
 226 }
 227
 228 /**
 229  * Register new primitive rasterization/rendering state.
 230  * This causes the drawing pipeline to be rebuilt.
 231  */
 232 void draw_set_rasterizer_state( struct draw_context *draw,
 233                                 const struct pipe_rasterizer_state *raster,
 234                                 void *rast_handle )
 235 {
 236    if (!draw->suspend_flushing) {
 237       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 238
 239       draw->rasterizer = raster;
 240       draw->rast_handle = rast_handle;
 241
 242   }
 243 }
 244
 245 /* With a little more work, llvmpipe will be able to turn this off and
 246  * do its own x/y clipping.
 247  *
 248  * Some hardware can turn off clipping altogether - in particular any
 249  * hardware with a TNL unit can do its own clipping, even if it is
 250  * relying on the draw module for some other reason.
 251  */
 252 void draw_set_driver_clipping( struct draw_context *draw,
 253                                boolean bypass_clip_xy,
 254                                boolean bypass_clip_z )
 255 {
 256    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 257
 258    draw->driver.bypass_clip_xy = bypass_clip_xy;
 259    draw->driver.bypass_clip_z = bypass_clip_z;
 260    update_clip_flags(draw);
 261 }
 262
 263
 264 /**
 265  * Plug in the primitive rendering/rasterization stage (which is the last
 266  * stage in the drawing pipeline).
 267  * This is provided by the device driver.
 268  */
 269 void draw_set_rasterize_stage( struct draw_context *draw,
 270                                struct draw_stage *stage )
 271 {
 272    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 273
 274    draw->pipeline.rasterize = stage;
 275 }
 276
 277
 278 /**
 279  * Set the draw module's clipping state.
 280  */
 281 void draw_set_clip_state( struct draw_context *draw,
 282                           const struct pipe_clip_state *clip )
 283 {
 284    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 285
 286    assert(clip->nr <= PIPE_MAX_CLIP_PLANES);
 287    memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0]));
 288    draw->nr_planes = 6 + clip->nr;
 289    draw->depth_clamp = clip->depth_clamp;
 290
 291    update_clip_flags(draw);
 292 }
 293
 294
 295 /**
 296  * Set the draw module's viewport state.
 297  */
 298 void draw_set_viewport_state( struct draw_context *draw,
 299                               const struct pipe_viewport_state *viewport )
 300 {
 301    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 302    draw->viewport = *viewport; /* struct copy */
 303    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
 304                               viewport->scale[1] == 1.0f &&
 305                               viewport->scale[2] == 1.0f &&
 306                               viewport->scale[3] == 1.0f &&
 307                               viewport->translate[0] == 0.0f &&
 308                               viewport->translate[1] == 0.0f &&
 309                               viewport->translate[2] == 0.0f &&
 310                               viewport->translate[3] == 0.0f);
 311
 312    draw_vs_set_viewport( draw, viewport );
 313 }
 314
 315
 316
 317 void
 318 draw_set_vertex_buffers(struct draw_context *draw,
 319                         unsigned count,
 320                         const struct pipe_vertex_buffer *buffers)
 321 {
 322    assert(count <= PIPE_MAX_ATTRIBS);
 323
 324    util_copy_vertex_buffers(draw->pt.vertex_buffer,
 325                             &draw->pt.nr_vertex_buffers,
 326                             buffers, count);
 327 }
 328
 329
 330 void
 331 draw_set_vertex_elements(struct draw_context *draw,
 332                          unsigned count,
 333                          const struct pipe_vertex_element *elements)
 334 {
 335    assert(count <= PIPE_MAX_ATTRIBS);
 336
 337    memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
 338    draw->pt.nr_vertex_elements = count;
 339 }
 340
 341
 342 /**
 343  * Tell drawing context where to find mapped vertex buffers.
 344  */
 345 void
 346 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 347                               unsigned attr, const void *buffer)
 348 {
 349    draw->pt.user.vbuffer[attr] = buffer;
 350 }
 351
 352
 353 void
 354 draw_set_mapped_constant_buffer(struct draw_context *draw,
 355                                 unsigned shader_type,
 356                                 unsigned slot,
 357                                 const void *buffer,
 358                                 unsigned size )
 359 {
 360    debug_assert(shader_type == PIPE_SHADER_VERTEX ||
 361                 shader_type == PIPE_SHADER_GEOMETRY);
 362    debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
 363
 364    switch (shader_type) {
 365    case PIPE_SHADER_VERTEX:
 366       draw->pt.user.vs_constants[slot] = buffer;
 367       draw->pt.user.vs_constants_size[slot] = size;
 368       draw->pt.user.planes = (float (*) [12][4]) &(draw->plane[0]);
 369       draw_vs_set_constants(draw, slot, buffer, size);
 370       break;
 371    case PIPE_SHADER_GEOMETRY:
 372       draw->pt.user.gs_constants[slot] = buffer;
 373       draw->pt.user.gs_constants_size[slot] = size;
 374       draw_gs_set_constants(draw, slot, buffer, size);
 375       break;
 376    default:
 377       assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
 378    }
 379 }
 380
 381
 382 /**
 383  * Tells the draw module to draw points with triangles if their size
 384  * is greater than this threshold.
 385  */
 386 void
 387 draw_wide_point_threshold(struct draw_context *draw, float threshold)
 388 {
 389    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 390    draw->pipeline.wide_point_threshold = threshold;
 391 }
 392
 393
 394 /**
 395  * Should the draw module handle point->quad conversion for drawing sprites?
 396  */
 397 void
 398 draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
 399 {
 400    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 401    draw->pipeline.wide_point_sprites = draw_sprite;
 402 }
 403
 404
 405 /**
 406  * Tells the draw module to draw lines with triangles if their width
 407  * is greater than this threshold.
 408  */
 409 void
 410 draw_wide_line_threshold(struct draw_context *draw, float threshold)
 411 {
 412    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 413    draw->pipeline.wide_line_threshold = roundf(threshold);
 414 }
 415
 416
 417 /**
 418  * Tells the draw module whether or not to implement line stipple.
 419  */
 420 void
 421 draw_enable_line_stipple(struct draw_context *draw, boolean enable)
 422 {
 423    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 424    draw->pipeline.line_stipple = enable;
 425 }
 426
 427
 428 /**
 429  * Tells draw module whether to convert points to quads for sprite mode.
 430  */
 431 void
 432 draw_enable_point_sprites(struct draw_context *draw, boolean enable)
 433 {
 434    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 435    draw->pipeline.point_sprite = enable;
 436 }
 437
 438
 439 void
 440 draw_set_force_passthrough( struct draw_context *draw, boolean enable )
 441 {
 442    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 443    draw->force_passthrough = enable;
 444 }
 445
 446
 447
 448 /**
 449  * Allocate an extra vertex/geometry shader vertex attribute.
 450  * This is used by some of the optional draw module stages such
 451  * as wide_point which may need to allocate additional generic/texcoord
 452  * attributes.
 453  */
 454 int
 455 draw_alloc_extra_vertex_attrib(struct draw_context *draw,
 456                                uint semantic_name, uint semantic_index)
 457 {
 458    const int num_outputs = draw_current_shader_outputs(draw);
 459    const int n = draw->extra_shader_outputs.num;
 460
 461    assert(n < Elements(draw->extra_shader_outputs.semantic_name));
 462
 463    draw->extra_shader_outputs.semantic_name[n] = semantic_name;
 464    draw->extra_shader_outputs.semantic_index[n] = semantic_index;
 465    draw->extra_shader_outputs.slot[n] = num_outputs + n;
 466    draw->extra_shader_outputs.num++;
 467
 468    return draw->extra_shader_outputs.slot[n];
 469 }
 470
 471
 472 /**
 473  * Remove all extra vertex attributes that were allocated with
 474  * draw_alloc_extra_vertex_attrib().
 475  */
 476 void
 477 draw_remove_extra_vertex_attribs(struct draw_context *draw)
 478 {
 479    draw->extra_shader_outputs.num = 0;
 480 }
 481
 482
 483 /**
 484  * Ask the draw module for the location/slot of the given vertex attribute in
 485  * a post-transformed vertex.
 486  *
 487  * With this function, drivers that use the draw module should have no reason
 488  * to track the current vertex/geometry shader.
 489  *
 490  * Note that the draw module may sometimes generate vertices with extra
 491  * attributes (such as texcoords for AA lines).  The driver can call this
 492  * function to find those attributes.
 493  *
 494  * Zero is returned if the attribute is not found since this is
 495  * a don't care / undefined situtation.  Returning -1 would be a bit more
 496  * work for the drivers.
 497  */
 498 int
 499 draw_find_shader_output(const struct draw_context *draw,
 500                         uint semantic_name, uint semantic_index)
 501 {
 502    const struct draw_vertex_shader *vs = draw->vs.vertex_shader;
 503    const struct draw_geometry_shader *gs = draw->gs.geometry_shader;
 504    uint i;
 505    const struct tgsi_shader_info *info = &vs->info;
 506
 507    if (gs)
 508       info = &gs->info;
 509
 510    for (i = 0; i < info->num_outputs; i++) {
 511       if (info->output_semantic_name[i] == semantic_name &&
 512           info->output_semantic_index[i] == semantic_index)
 513          return i;
 514    }
 515
 516    /* Search the extra vertex attributes */
 517    for (i = 0; i < draw->extra_shader_outputs.num; i++) {
 518       if (draw->extra_shader_outputs.semantic_name[i] == semantic_name &&
 519           draw->extra_shader_outputs.semantic_index[i] == semantic_index) {
 520          return draw->extra_shader_outputs.slot[i];
 521       }
 522    }
 523
 524    return 0;
 525 }
 526
 527
 528 /**
 529  * Return total number of the shader outputs.  This function is similar to
 530  * draw_current_shader_outputs() but this function also counts any extra
 531  * vertex/geometry output attributes that may be filled in by some draw
 532  * stages (such as AA point, AA line).
 533  *
 534  * If geometry shader is present, its output will be returned,
 535  * if not vertex shader is used.
 536  */
 537 uint
 538 draw_num_shader_outputs(const struct draw_context *draw)
 539 {
 540    uint count;
 541
 542    /* If a geometry shader is present, its outputs go to the
 543     * driver, else the vertex shader's outputs.
 544     */
 545    if (draw->gs.geometry_shader)
 546       count = draw->gs.geometry_shader->info.num_outputs;
 547    else
 548       count = draw->vs.vertex_shader->info.num_outputs;
 549
 550    count += draw->extra_shader_outputs.num;
 551
 552    return count;
 553 }
 554
 555
 556 /**
 557  * Provide TGSI sampler objects for vertex/geometry shaders that use
 558  * texture fetches.
 559  * This might only be used by software drivers for the time being.
 560  */
 561 void
 562 draw_texture_samplers(struct draw_context *draw,
 563                       uint shader,
 564                       uint num_samplers,
 565                       struct tgsi_sampler **samplers)
 566 {
 567    if (shader == PIPE_SHADER_VERTEX) {
 568       draw->vs.num_samplers = num_samplers;
 569       draw->vs.samplers = samplers;
 570    } else {
 571       debug_assert(shader == PIPE_SHADER_GEOMETRY);
 572       draw->gs.num_samplers = num_samplers;
 573       draw->gs.samplers = samplers;
 574    }
 575 }
 576
 577
 578
 579
 580 void draw_set_render( struct draw_context *draw,
 581                       struct vbuf_render *render )
 582 {
 583    draw->render = render;
 584 }
 585
 586
 587 void
 588 draw_set_index_buffer(struct draw_context *draw,
 589                       const struct pipe_index_buffer *ib)
 590 {
 591    if (ib)
 592       memcpy(&draw->pt.index_buffer, ib, sizeof(draw->pt.index_buffer));
 593    else
 594       memset(&draw->pt.index_buffer, 0, sizeof(draw->pt.index_buffer));
 595 }
 596
 597
 598 /**
 599  * Tell drawing context where to find mapped index/element buffer.
 600  */
 601 void
 602 draw_set_mapped_index_buffer(struct draw_context *draw,
 603                              const void *elements)
 604 {
 605     draw->pt.user.elts = elements;
 606 }
 607
 608
 609 /* Revamp me please:
 610  */
 611 void draw_do_flush( struct draw_context *draw, unsigned flags )
 612 {
 613    if (!draw->suspend_flushing)
 614    {
 615       assert(!draw->flushing); /* catch inadvertant recursion */
 616
 617       draw->flushing = TRUE;
 618
 619       draw_pipeline_flush( draw, flags );
 620
 621       draw->reduced_prim = ~0; /* is reduced_prim needed any more? */
 622
 623       draw->flushing = FALSE;
 624    }
 625 }
 626
 627
 628 /**
 629  * Return the number of output attributes produced by the geometry
 630  * shader, if present.  If no geometry shader, return the number of
 631  * outputs from the vertex shader.
 632  * \sa draw_num_shader_outputs
 633  */
 634 uint
 635 draw_current_shader_outputs(const struct draw_context *draw)
 636 {
 637    if (draw->gs.geometry_shader)
 638       return draw->gs.num_gs_outputs;
 639    return draw->vs.num_vs_outputs;
 640 }
 641
 642
 643 /**
 644  * Return the index of the shader output which will contain the
 645  * vertex position.
 646  */
 647 uint
 648 draw_current_shader_position_output(const struct draw_context *draw)
 649 {
 650    if (draw->gs.geometry_shader)
 651       return draw->gs.position_output;
 652    return draw->vs.position_output;
 653 }
 654
 655
 656 /**
 657  * Return a pointer/handle for a driver/CSO rasterizer object which
 658  * disabled culling, stippling, unfilled tris, etc.
 659  * This is used by some pipeline stages (such as wide_point, aa_line
 660  * and aa_point) which convert points/lines into triangles.  In those
 661  * cases we don't want to accidentally cull the triangles.
 662  *
 663  * \param scissor  should the rasterizer state enable scissoring?
 664  * \param flatshade  should the rasterizer state use flat shading?
 665  * \return  rasterizer CSO handle
 666  */
 667 void *
 668 draw_get_rasterizer_no_cull( struct draw_context *draw,
 669                              boolean scissor,
 670                              boolean flatshade )
 671 {
 672    if (!draw->rasterizer_no_cull[scissor][flatshade]) {
 673       /* create now */
 674       struct pipe_context *pipe = draw->pipe;
 675       struct pipe_rasterizer_state rast;
 676
 677       memset(&rast, 0, sizeof(rast));
 678       rast.scissor = scissor;
 679       rast.flatshade = flatshade;
 680       rast.front_ccw = 1;
 681       rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
 682
 683       draw->rasterizer_no_cull[scissor][flatshade] =
 684          pipe->create_rasterizer_state(pipe, &rast);
 685    }
 686    return draw->rasterizer_no_cull[scissor][flatshade];
 687 }
 688
 689 void
 690 draw_set_mapped_so_buffers(struct draw_context *draw,
 691                            void *buffers[PIPE_MAX_SO_BUFFERS],
 692                            unsigned num_buffers)
 693 {
 694    int i;
 695
 696    for (i = 0; i < num_buffers; ++i) {
 697       draw->so.buffers[i] = buffers[i];
 698    }
 699    draw->so.num_buffers = num_buffers;
 700 }
 701
 702 void
 703 draw_set_so_state(struct draw_context *draw,
 704                   struct pipe_stream_output_state *state)
 705 {
 706    memcpy(&draw->so.state,
 707           state,
 708           sizeof(struct pipe_stream_output_state));
 709 }
 710
 711 void
 712 draw_set_sampler_views(struct draw_context *draw,
 713                        struct pipe_sampler_view **views,
 714                        unsigned num)
 715 {
 716    unsigned i;
 717
 718    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 719
 720    for (i = 0; i < num; ++i)
 721       draw->sampler_views[i] = views[i];
 722    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 723       draw->sampler_views[i] = NULL;
 724
 725    draw->num_sampler_views = num;
 726 }
 727
 728 void
 729 draw_set_samplers(struct draw_context *draw,
 730                   struct pipe_sampler_state **samplers,
 731                   unsigned num)
 732 {
 733    unsigned i;
 734
 735    debug_assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
 736
 737    for (i = 0; i < num; ++i)
 738       draw->samplers[i] = samplers[i];
 739    for (i = num; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
 740       draw->samplers[i] = NULL;
 741
 742    draw->num_samplers = num;
 743
 744 #ifdef HAVE_LLVM
 745    if (draw->llvm)
 746       draw_llvm_set_sampler_state(draw);
 747 #endif
 748 }
 749
 750 void
 751 draw_set_mapped_texture(struct draw_context *draw,
 752                         unsigned sampler_idx,
 753                         uint32_t width, uint32_t height, uint32_t depth,
 754                         uint32_t first_level, uint32_t last_level,
 755                         uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
 756                         uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
 757                         const void *data[PIPE_MAX_TEXTURE_LEVELS])
 758 {
 759 #ifdef HAVE_LLVM
 760    if(draw->llvm)
 761       draw_llvm_set_mapped_texture(draw,
 762                                 sampler_idx,
 763                                 width, height, depth, first_level, last_level,
 764                                 row_stride, img_stride, data);
 765 #endif
 766 }