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 "util/u_helpers.h"
  40 #include "draw_context.h"
  41 #include "draw_vs.h"
  42 #include "draw_gs.h"
  43
  44 #if HAVE_LLVM
  45 #include "gallivm/lp_bld_init.h"
  46 #include "gallivm/lp_bld_limits.h"
  47 #include "draw_llvm.h"
  48
  49 boolean
  50 draw_get_option_use_llvm(void)
  51 {
  52    static boolean first = TRUE;
  53    static boolean value;
  54    if (first) {
  55       first = FALSE;
  56       value = debug_get_bool_option("DRAW_USE_LLVM", TRUE);
  57
  58 #ifdef PIPE_ARCH_X86
  59       util_cpu_detect();
  60       /* require SSE2 due to LLVM PR6960. */
  61       if (!util_cpu_caps.has_sse2)
  62          value = FALSE;
  63 #endif
  64    }
  65    return value;
  66 }
  67 #endif
  68
  69
  70 /**
  71  * Create new draw module context with gallivm state for LLVM JIT.
  72  */
  73 static struct draw_context *
  74 draw_create_context(struct pipe_context *pipe, boolean try_llvm)
  75 {
  76    struct draw_context *draw = CALLOC_STRUCT( draw_context );
  77    if (draw == NULL)
  78       goto err_out;
  79
  80 #if HAVE_LLVM
  81    if (try_llvm && draw_get_option_use_llvm()) {
  82       draw->llvm = draw_llvm_create(draw);
  83       if (!draw->llvm)
  84          goto err_destroy;
  85    }
  86 #endif
  87
  88    draw->pipe = pipe;
  89
  90    if (!draw_init(draw))
  91       goto err_destroy;
  92
  93    return draw;
  94
  95 err_destroy:
  96    draw_destroy( draw );
  97 err_out:
  98    return NULL;
  99 }
 100
 101
 102 /**
 103  * Create new draw module context, with LLVM JIT.
 104  */
 105 struct draw_context *
 106 draw_create(struct pipe_context *pipe)
 107 {
 108    return draw_create_context(pipe, TRUE);
 109 }
 110
 111
 112 /**
 113  * Create a new draw context, without LLVM JIT.
 114  */
 115 struct draw_context *
 116 draw_create_no_llvm(struct pipe_context *pipe)
 117 {
 118    return draw_create_context(pipe, FALSE);
 119 }
 120
 121
 122 boolean draw_init(struct draw_context *draw)
 123 {
 124    /*
 125     * Note that several functions compute the clipmask of the predefined
 126     * formats with hardcoded formulas instead of using these. So modifications
 127     * here must be reflected there too.
 128     */
 129
 130    ASSIGN_4V( draw->plane[0], -1,  0,  0, 1 );
 131    ASSIGN_4V( draw->plane[1],  1,  0,  0, 1 );
 132    ASSIGN_4V( draw->plane[2],  0, -1,  0, 1 );
 133    ASSIGN_4V( draw->plane[3],  0,  1,  0, 1 );
 134    ASSIGN_4V( draw->plane[4],  0,  0,  1, 1 ); /* yes these are correct */
 135    ASSIGN_4V( draw->plane[5],  0,  0, -1, 1 ); /* mesa's a bit wonky */
 136    draw->clip_xy = TRUE;
 137    draw->clip_z = TRUE;
 138
 139    draw->pt.user.planes = (float (*) [DRAW_TOTAL_CLIP_PLANES][4]) &(draw->plane[0]);
 140
 141    if (!draw_pipeline_init( draw ))
 142       return FALSE;
 143
 144    if (!draw_pt_init( draw ))
 145       return FALSE;
 146
 147    if (!draw_vs_init( draw ))
 148       return FALSE;
 149
 150    if (!draw_gs_init( draw ))
 151       return FALSE;
 152
 153    draw->quads_always_flatshade_last = !draw->pipe->screen->get_param(
 154       draw->pipe->screen, PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION);
 155
 156    return TRUE;
 157 }
 158
 159
 160 void draw_destroy( struct draw_context *draw )
 161 {
 162    struct pipe_context *pipe;
 163    unsigned i, j;
 164
 165    if (!draw)
 166       return;
 167
 168    pipe = draw->pipe;
 169
 170    /* free any rasterizer CSOs that we may have created.
 171     */
 172    for (i = 0; i < 2; i++) {
 173       for (j = 0; j < 2; j++) {
 174          if (draw->rasterizer_no_cull[i][j]) {
 175             pipe->delete_rasterizer_state(pipe, draw->rasterizer_no_cull[i][j]);
 176          }
 177       }
 178    }
 179
 180    for (i = 0; i < draw->pt.nr_vertex_buffers; i++) {
 181       pipe_resource_reference(&draw->pt.vertex_buffer[i].buffer, NULL);
 182    }
 183
 184    /* Not so fast -- we're just borrowing this at the moment.
 185     *
 186    if (draw->render)
 187       draw->render->destroy( draw->render );
 188    */
 189
 190    draw_pipeline_destroy( draw );
 191    draw_pt_destroy( draw );
 192    draw_vs_destroy( draw );
 193    draw_gs_destroy( draw );
 194 #ifdef HAVE_LLVM
 195    if (draw->llvm)
 196       draw_llvm_destroy( draw->llvm );
 197 #endif
 198
 199    FREE( draw );
 200 }
 201
 202
 203
 204 void draw_flush( struct draw_context *draw )
 205 {
 206    draw_do_flush( draw, DRAW_FLUSH_BACKEND );
 207 }
 208
 209
 210 /**
 211  * Specify the Minimum Resolvable Depth factor for polygon offset.
 212  * This factor potentially depends on the number of Z buffer bits,
 213  * the rasterization algorithm and the arithmetic performed on Z
 214  * values between vertex shading and rasterization.  It will vary
 215  * from one driver to another.
 216  */
 217 void draw_set_mrd(struct draw_context *draw, double mrd)
 218 {
 219    draw->mrd = mrd;
 220 }
 221
 222
 223 static void update_clip_flags( struct draw_context *draw )
 224 {
 225    draw->clip_xy = !draw->driver.bypass_clip_xy;
 226    draw->guard_band_xy = (!draw->driver.bypass_clip_xy &&
 227                           draw->driver.guard_band_xy);
 228    draw->clip_z = (!draw->driver.bypass_clip_z &&
 229                    draw->rasterizer && draw->rasterizer->depth_clip);
 230    draw->clip_user = draw->rasterizer &&
 231                      draw->rasterizer->clip_plane_enable != 0;
 232 }
 233
 234 /**
 235  * Register new primitive rasterization/rendering state.
 236  * This causes the drawing pipeline to be rebuilt.
 237  */
 238 void draw_set_rasterizer_state( struct draw_context *draw,
 239                                 const struct pipe_rasterizer_state *raster,
 240                                 void *rast_handle )
 241 {
 242    if (!draw->suspend_flushing) {
 243       draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 244
 245       draw->rasterizer = raster;
 246       draw->rast_handle = rast_handle;
 247       update_clip_flags(draw);
 248    }
 249 }
 250
 251 /* With a little more work, llvmpipe will be able to turn this off and
 252  * do its own x/y clipping.
 253  *
 254  * Some hardware can turn off clipping altogether - in particular any
 255  * hardware with a TNL unit can do its own clipping, even if it is
 256  * relying on the draw module for some other reason.
 257  */
 258 void draw_set_driver_clipping( struct draw_context *draw,
 259                                boolean bypass_clip_xy,
 260                                boolean bypass_clip_z,
 261                                boolean guard_band_xy)
 262 {
 263    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 264
 265    draw->driver.bypass_clip_xy = bypass_clip_xy;
 266    draw->driver.bypass_clip_z = bypass_clip_z;
 267    draw->driver.guard_band_xy = guard_band_xy;
 268    update_clip_flags(draw);
 269 }
 270
 271
 272 /**
 273  * Plug in the primitive rendering/rasterization stage (which is the last
 274  * stage in the drawing pipeline).
 275  * This is provided by the device driver.
 276  */
 277 void draw_set_rasterize_stage( struct draw_context *draw,
 278                                struct draw_stage *stage )
 279 {
 280    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 281
 282    draw->pipeline.rasterize = stage;
 283 }
 284
 285
 286 /**
 287  * Set the draw module's clipping state.
 288  */
 289 void draw_set_clip_state( struct draw_context *draw,
 290                           const struct pipe_clip_state *clip )
 291 {
 292    draw_do_flush(draw, DRAW_FLUSH_PARAMETER_CHANGE);
 293
 294    memcpy(&draw->plane[6], clip->ucp, sizeof(clip->ucp));
 295 }
 296
 297
 298 /**
 299  * Set the draw module's viewport state.
 300  */
 301 void draw_set_viewport_state( struct draw_context *draw,
 302                               const struct pipe_viewport_state *viewport )
 303 {
 304    draw_do_flush(draw, DRAW_FLUSH_PARAMETER_CHANGE);
 305    draw->viewport = *viewport; /* struct copy */
 306    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
 307                               viewport->scale[1] == 1.0f &&
 308                               viewport->scale[2] == 1.0f &&
 309                               viewport->scale[3] == 1.0f &&
 310                               viewport->translate[0] == 0.0f &&
 311                               viewport->translate[1] == 0.0f &&
 312                               viewport->translate[2] == 0.0f &&
 313                               viewport->translate[3] == 0.0f);
 314
 315    draw_vs_set_viewport( draw, viewport );
 316 }
 317
 318
 319
 320 void
 321 draw_set_vertex_buffers(struct draw_context *draw,
 322                         unsigned start_slot, unsigned count,
 323                         const struct pipe_vertex_buffer *buffers)
 324 {
 325    assert(start_slot + count <= PIPE_MAX_ATTRIBS);
 326
 327    util_set_vertex_buffers_count(draw->pt.vertex_buffer,
 328                                  &draw->pt.nr_vertex_buffers,
 329                                  buffers, start_slot, count);
 330 }
 331
 332
 333 void
 334 draw_set_vertex_elements(struct draw_context *draw,
 335                          unsigned count,
 336                          const struct pipe_vertex_element *elements)
 337 {
 338    assert(count <= PIPE_MAX_ATTRIBS);
 339
 340    /* We could improve this by only flushing the frontend and the fetch part
 341     * of the middle. This would avoid recalculating the emit keys.*/
 342    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 343
 344    memcpy(draw->pt.vertex_element, elements, count * sizeof(elements[0]));
 345    draw->pt.nr_vertex_elements = count;
 346 }
 347
 348
 349 /**
 350  * Tell drawing context where to find mapped vertex buffers.
 351  */
 352 void
 353 draw_set_mapped_vertex_buffer(struct draw_context *draw,
 354                               unsigned attr, const void *buffer)
 355 {
 356    draw->pt.user.vbuffer[attr] = buffer;
 357 }
 358
 359
 360 void
 361 draw_set_mapped_constant_buffer(struct draw_context *draw,
 362                                 unsigned shader_type,
 363                                 unsigned slot,
 364                                 const void *buffer,
 365                                 unsigned size )
 366 {
 367    debug_assert(shader_type == PIPE_SHADER_VERTEX ||
 368                 shader_type == PIPE_SHADER_GEOMETRY);
 369    debug_assert(slot < PIPE_MAX_CONSTANT_BUFFERS);
 370
 371    draw_do_flush(draw, DRAW_FLUSH_PARAMETER_CHANGE);
 372
 373    switch (shader_type) {
 374    case PIPE_SHADER_VERTEX:
 375       draw->pt.user.vs_constants[slot] = buffer;
 376       draw->pt.user.vs_constants_size[slot] = size;
 377       break;
 378    case PIPE_SHADER_GEOMETRY:
 379       draw->pt.user.gs_constants[slot] = buffer;
 380       draw->pt.user.gs_constants_size[slot] = size;
 381       break;
 382    default:
 383       assert(0 && "invalid shader type in draw_set_mapped_constant_buffer");
 384    }
 385 }
 386
 387
 388 /**
 389  * Tells the draw module to draw points with triangles if their size
 390  * is greater than this threshold.
 391  */
 392 void
 393 draw_wide_point_threshold(struct draw_context *draw, float threshold)
 394 {
 395    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 396    draw->pipeline.wide_point_threshold = threshold;
 397 }
 398
 399
 400 /**
 401  * Should the draw module handle point->quad conversion for drawing sprites?
 402  */
 403 void
 404 draw_wide_point_sprites(struct draw_context *draw, boolean draw_sprite)
 405 {
 406    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 407    draw->pipeline.wide_point_sprites = draw_sprite;
 408 }
 409
 410
 411 /**
 412  * Tells the draw module to draw lines with triangles if their width
 413  * is greater than this threshold.
 414  */
 415 void
 416 draw_wide_line_threshold(struct draw_context *draw, float threshold)
 417 {
 418    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 419    draw->pipeline.wide_line_threshold = roundf(threshold);
 420 }
 421
 422
 423 /**
 424  * Tells the draw module whether or not to implement line stipple.
 425  */
 426 void
 427 draw_enable_line_stipple(struct draw_context *draw, boolean enable)
 428 {
 429    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 430    draw->pipeline.line_stipple = enable;
 431 }
 432
 433
 434 /**
 435  * Tells draw module whether to convert points to quads for sprite mode.
 436  */
 437 void
 438 draw_enable_point_sprites(struct draw_context *draw, boolean enable)
 439 {
 440    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 441    draw->pipeline.point_sprite = enable;
 442 }
 443
 444
 445 void
 446 draw_set_force_passthrough( struct draw_context *draw, boolean enable )
 447 {
 448    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 449    draw->force_passthrough = enable;
 450 }
 451
 452
 453
 454 /**
 455  * Allocate an extra vertex/geometry shader vertex attribute, if it doesn't
 456  * exist already.
 457  *
 458  * This is used by some of the optional draw module stages such
 459  * as wide_point which may need to allocate additional generic/texcoord
 460  * attributes.
 461  */
 462 int
 463 draw_alloc_extra_vertex_attrib(struct draw_context *draw,
 464                                uint semantic_name, uint semantic_index)
 465 {
 466    int slot;
 467    uint num_outputs;
 468    uint n;
 469
 470    slot = draw_find_shader_output(draw, semantic_name, semantic_index);
 471    if (slot > 0) {
 472       return slot;
 473    }
 474
 475    num_outputs = draw_current_shader_outputs(draw);
 476    n = draw->extra_shader_outputs.num;
 477
 478    assert(n < Elements(draw->extra_shader_outputs.semantic_name));
 479
 480    draw->extra_shader_outputs.semantic_name[n] = semantic_name;
 481    draw->extra_shader_outputs.semantic_index[n] = semantic_index;
 482    draw->extra_shader_outputs.slot[n] = num_outputs + n;
 483    draw->extra_shader_outputs.num++;
 484
 485    return draw->extra_shader_outputs.slot[n];
 486 }
 487
 488
 489 /**
 490  * Remove all extra vertex attributes that were allocated with
 491  * draw_alloc_extra_vertex_attrib().
 492  */
 493 void
 494 draw_remove_extra_vertex_attribs(struct draw_context *draw)
 495 {
 496    draw->extra_shader_outputs.num = 0;
 497 }
 498
 499
 500 /**
 501  * If a geometry shader is present, return its info, else the vertex shader's
 502  * info.
 503  */
 504 struct tgsi_shader_info *
 505 draw_get_shader_info(const struct draw_context *draw)
 506 {
 507
 508    if (draw->gs.geometry_shader) {
 509       return &draw->gs.geometry_shader->info;
 510    } else {
 511       return &draw->vs.vertex_shader->info;
 512    }
 513 }
 514
 515
 516 /**
 517  * Ask the draw module for the location/slot of the given vertex attribute in
 518  * a post-transformed vertex.
 519  *
 520  * With this function, drivers that use the draw module should have no reason
 521  * to track the current vertex/geometry shader.
 522  *
 523  * Note that the draw module may sometimes generate vertices with extra
 524  * attributes (such as texcoords for AA lines).  The driver can call this
 525  * function to find those attributes.
 526  *
 527  * Zero is returned if the attribute is not found since this is
 528  * a don't care / undefined situtation.  Returning -1 would be a bit more
 529  * work for the drivers.
 530  */
 531 int
 532 draw_find_shader_output(const struct draw_context *draw,
 533                         uint semantic_name, uint semantic_index)
 534 {
 535    const struct tgsi_shader_info *info = draw_get_shader_info(draw);
 536    uint i;
 537
 538    for (i = 0; i < info->num_outputs; i++) {
 539       if (info->output_semantic_name[i] == semantic_name &&
 540           info->output_semantic_index[i] == semantic_index)
 541          return i;
 542    }
 543
 544    /* Search the extra vertex attributes */
 545    for (i = 0; i < draw->extra_shader_outputs.num; i++) {
 546       if (draw->extra_shader_outputs.semantic_name[i] == semantic_name &&
 547           draw->extra_shader_outputs.semantic_index[i] == semantic_index) {
 548          return draw->extra_shader_outputs.slot[i];
 549       }
 550    }
 551
 552    return 0;
 553 }
 554
 555
 556 /**
 557  * Return total number of the shader outputs.  This function is similar to
 558  * draw_current_shader_outputs() but this function also counts any extra
 559  * vertex/geometry output attributes that may be filled in by some draw
 560  * stages (such as AA point, AA line).
 561  *
 562  * If geometry shader is present, its output will be returned,
 563  * if not vertex shader is used.
 564  */
 565 uint
 566 draw_num_shader_outputs(const struct draw_context *draw)
 567 {
 568    const struct tgsi_shader_info *info = draw_get_shader_info(draw);
 569    uint count;
 570
 571    count = info->num_outputs;
 572    count += draw->extra_shader_outputs.num;
 573
 574    return count;
 575 }
 576
 577
 578 /**
 579  * Provide TGSI sampler objects for vertex/geometry shaders that use
 580  * texture fetches.  This state only needs to be set once per context.
 581  * This might only be used by software drivers for the time being.
 582  */
 583 void
 584 draw_texture_sampler(struct draw_context *draw,
 585                      uint shader,
 586                      struct tgsi_sampler *sampler)
 587 {
 588    if (shader == PIPE_SHADER_VERTEX) {
 589       draw->vs.tgsi.sampler = sampler;
 590    } else {
 591       debug_assert(shader == PIPE_SHADER_GEOMETRY);
 592       draw->gs.tgsi.sampler = sampler;
 593    }
 594 }
 595
 596
 597
 598
 599 void draw_set_render( struct draw_context *draw,
 600                       struct vbuf_render *render )
 601 {
 602    draw->render = render;
 603 }
 604
 605
 606 /**
 607  * Tell the draw module where vertex indexes/elements are located, and
 608  * their size (in bytes).
 609  *
 610  * Note: the caller must apply the pipe_index_buffer::offset value to
 611  * the address.  The draw module doesn't do that.
 612  */
 613 void
 614 draw_set_indexes(struct draw_context *draw,
 615                  const void *elements, unsigned elem_size)
 616 {
 617    assert(elem_size == 0 ||
 618           elem_size == 1 ||
 619           elem_size == 2 ||
 620           elem_size == 4);
 621    draw->pt.user.elts = elements;
 622    draw->pt.user.eltSizeIB = elem_size;
 623 }
 624
 625
 626 /* Revamp me please:
 627  */
 628 void draw_do_flush( struct draw_context *draw, unsigned flags )
 629 {
 630    if (!draw->suspend_flushing)
 631    {
 632       assert(!draw->flushing); /* catch inadvertant recursion */
 633
 634       draw->flushing = TRUE;
 635
 636       draw_pipeline_flush( draw, flags );
 637
 638       draw_pt_flush( draw, flags );
 639
 640       draw->flushing = FALSE;
 641    }
 642 }
 643
 644
 645 /**
 646  * Return the number of output attributes produced by the geometry
 647  * shader, if present.  If no geometry shader, return the number of
 648  * outputs from the vertex shader.
 649  * \sa draw_num_shader_outputs
 650  */
 651 uint
 652 draw_current_shader_outputs(const struct draw_context *draw)
 653 {
 654    if (draw->gs.geometry_shader)
 655       return draw->gs.num_gs_outputs;
 656    return draw->vs.num_vs_outputs;
 657 }
 658
 659
 660 /**
 661  * Return the index of the shader output which will contain the
 662  * vertex position.
 663  */
 664 uint
 665 draw_current_shader_position_output(const struct draw_context *draw)
 666 {
 667    if (draw->gs.geometry_shader)
 668       return draw->gs.position_output;
 669    return draw->vs.position_output;
 670 }
 671
 672
 673 /**
 674  * Return the index of the shader output which will contain the
 675  * vertex position.
 676  */
 677 uint
 678 draw_current_shader_clipvertex_output(const struct draw_context *draw)
 679 {
 680    return draw->vs.clipvertex_output;
 681 }
 682
 683 uint
 684 draw_current_shader_clipdistance_output(const struct draw_context *draw, int index)
 685 {
 686    return draw->vs.clipdistance_output[index];
 687 }
 688
 689 /**
 690  * Return a pointer/handle for a driver/CSO rasterizer object which
 691  * disabled culling, stippling, unfilled tris, etc.
 692  * This is used by some pipeline stages (such as wide_point, aa_line
 693  * and aa_point) which convert points/lines into triangles.  In those
 694  * cases we don't want to accidentally cull the triangles.
 695  *
 696  * \param scissor  should the rasterizer state enable scissoring?
 697  * \param flatshade  should the rasterizer state use flat shading?
 698  * \return  rasterizer CSO handle
 699  */
 700 void *
 701 draw_get_rasterizer_no_cull( struct draw_context *draw,
 702                              boolean scissor,
 703                              boolean flatshade )
 704 {
 705    if (!draw->rasterizer_no_cull[scissor][flatshade]) {
 706       /* create now */
 707       struct pipe_context *pipe = draw->pipe;
 708       struct pipe_rasterizer_state rast;
 709
 710       memset(&rast, 0, sizeof(rast));
 711       rast.scissor = scissor;
 712       rast.flatshade = flatshade;
 713       rast.front_ccw = 1;
 714       rast.gl_rasterization_rules = draw->rasterizer->gl_rasterization_rules;
 715       rast.clip_halfz = draw->rasterizer->clip_halfz;
 716
 717       draw->rasterizer_no_cull[scissor][flatshade] =
 718          pipe->create_rasterizer_state(pipe, &rast);
 719    }
 720    return draw->rasterizer_no_cull[scissor][flatshade];
 721 }
 722
 723 void
 724 draw_set_mapped_so_targets(struct draw_context *draw,
 725                            int num_targets,
 726                            struct draw_so_target *targets[PIPE_MAX_SO_BUFFERS])
 727 {
 728    int i;
 729
 730    for (i = 0; i < num_targets; i++)
 731       draw->so.targets[i] = targets[i];
 732    for (i = num_targets; i < PIPE_MAX_SO_BUFFERS; i++)
 733       draw->so.targets[i] = NULL;
 734
 735    draw->so.num_targets = num_targets;
 736 }
 737
 738 void
 739 draw_set_sampler_views(struct draw_context *draw,
 740                        unsigned shader_stage,
 741                        struct pipe_sampler_view **views,
 742                        unsigned num)
 743 {
 744    unsigned i;
 745
 746    debug_assert(shader_stage < PIPE_SHADER_TYPES);
 747    debug_assert(num <= PIPE_MAX_SHADER_SAMPLER_VIEWS);
 748
 749    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 750
 751    for (i = 0; i < num; ++i)
 752       draw->sampler_views[shader_stage][i] = views[i];
 753    for (i = num; i < PIPE_MAX_SHADER_SAMPLER_VIEWS; ++i)
 754       draw->sampler_views[shader_stage][i] = NULL;
 755
 756    draw->num_sampler_views[shader_stage] = num;
 757 }
 758
 759 void
 760 draw_set_samplers(struct draw_context *draw,
 761                   unsigned shader_stage,
 762                   struct pipe_sampler_state **samplers,
 763                   unsigned num)
 764 {
 765    unsigned i;
 766
 767    debug_assert(shader_stage < PIPE_SHADER_TYPES);
 768    debug_assert(num <= PIPE_MAX_SAMPLERS);
 769
 770    draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE );
 771
 772    for (i = 0; i < num; ++i)
 773       draw->samplers[shader_stage][i] = samplers[i];
 774    for (i = num; i < PIPE_MAX_SAMPLERS; ++i)
 775       draw->samplers[shader_stage][i] = NULL;
 776
 777    draw->num_samplers[shader_stage] = num;
 778
 779 #ifdef HAVE_LLVM
 780    if (draw->llvm)
 781       draw_llvm_set_sampler_state(draw, shader_stage);
 782 #endif
 783 }
 784
 785 void
 786 draw_set_mapped_texture(struct draw_context *draw,
 787                         unsigned shader_stage,
 788                         unsigned sview_idx,
 789                         uint32_t width, uint32_t height, uint32_t depth,
 790                         uint32_t first_level, uint32_t last_level,
 791                         const void *base_ptr,
 792                         uint32_t row_stride[PIPE_MAX_TEXTURE_LEVELS],
 793                         uint32_t img_stride[PIPE_MAX_TEXTURE_LEVELS],
 794                         uint32_t mip_offsets[PIPE_MAX_TEXTURE_LEVELS])
 795 {
 796 #ifdef HAVE_LLVM
 797    if (draw->llvm)
 798       draw_llvm_set_mapped_texture(draw,
 799                                    shader_stage,
 800                                    sview_idx,
 801                                    width, height, depth, first_level,
 802                                    last_level, base_ptr,
 803                                    row_stride, img_stride, mip_offsets);
 804 #endif
 805 }
 806
 807 /**
 808  * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
 809  * different ways of setting textures, and drivers typically only support one.
 810  */
 811 int
 812 draw_get_shader_param_no_llvm(unsigned shader, enum pipe_shader_cap param)
 813 {
 814    switch(shader) {
 815    case PIPE_SHADER_VERTEX:
 816    case PIPE_SHADER_GEOMETRY:
 817       return tgsi_exec_get_shader_param(param);
 818    default:
 819       return 0;
 820    }
 821 }
 822
 823 /**
 824  * XXX: Results for PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS because there are two
 825  * different ways of setting textures, and drivers typically only support one.
 826  */
 827 int
 828 draw_get_shader_param(unsigned shader, enum pipe_shader_cap param)
 829 {
 830
 831 #ifdef HAVE_LLVM
 832    if (draw_get_option_use_llvm()) {
 833       switch(shader) {
 834       case PIPE_SHADER_VERTEX:
 835       case PIPE_SHADER_GEOMETRY:
 836          return gallivm_get_shader_param(param);
 837       default:
 838          return 0;
 839       }
 840    }
 841 #endif
 842
 843    return draw_get_shader_param_no_llvm(shader, param);
 844 }
 845
 846 /**
 847  * Enables or disables collection of statistics.
 848  *
 849  * Draw module is capable of generating statistics for the vertex
 850  * processing pipeline. Collection of that data isn't free and so
 851  * it's disabled by default. The users of the module can enable
 852  * (or disable) this functionality through this function.
 853  * The actual data will be emitted through the VBUF interface,
 854  * the 'pipeline_statistics' callback to be exact.
 855  */
 856 void
 857 draw_collect_pipeline_statistics(struct draw_context *draw,
 858                                  boolean enable)
 859 {
 860    draw->collect_statistics = enable;
 861 }