src/gallium/drivers/llvmpipe/lp_setup.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  * Tiling engine.
  30  *
  31  * Builds per-tile display lists and executes them on calls to
  32  * lp_setup_flush().
  33  */
  34
  35 #include "pipe/p_defines.h"
  36 #include "util/u_inlines.h"
  37 #include "util/u_memory.h"
  38 #include "util/u_pack_color.h"
  39 #include "util/u_surface.h"
  40 #include "lp_scene.h"
  41 #include "lp_scene_queue.h"
  42 #include "lp_texture.h"
  43 #include "lp_debug.h"
  44 #include "lp_fence.h"
  45 #include "lp_rast.h"
  46 #include "lp_setup_context.h"
  47 #include "lp_screen.h"
  48 #include "state_tracker/sw_winsys.h"
  49
  50 #include "draw/draw_context.h"
  51 #include "draw/draw_vbuf.h"
  52
  53
  54 static void set_scene_state( struct lp_setup_context *, unsigned );
  55
  56
  57 struct lp_scene *
  58 lp_setup_get_current_scene(struct lp_setup_context *setup)
  59 {
  60    if (!setup->scene) {
  61
  62       /* wait for a free/empty scene
  63        */
  64       setup->scene = lp_scene_dequeue(setup->empty_scenes, TRUE);
  65
  66       assert(lp_scene_is_empty(setup->scene));
  67
  68       lp_scene_begin_binning(setup->scene,
  69                              &setup->fb );
  70    }
  71    return setup->scene;
  72 }
  73
  74
  75 static void
  76 first_triangle( struct lp_setup_context *setup,
  77                 const float (*v0)[4],
  78                 const float (*v1)[4],
  79                 const float (*v2)[4])
  80 {
  81    set_scene_state( setup, SETUP_ACTIVE );
  82    lp_setup_choose_triangle( setup );
  83    setup->triangle( setup, v0, v1, v2 );
  84 }
  85
  86 static void
  87 first_line( struct lp_setup_context *setup,
  88             const float (*v0)[4],
  89             const float (*v1)[4])
  90 {
  91    set_scene_state( setup, SETUP_ACTIVE );
  92    lp_setup_choose_line( setup );
  93    setup->line( setup, v0, v1 );
  94 }
  95
  96 static void
  97 first_point( struct lp_setup_context *setup,
  98              const float (*v0)[4])
  99 {
 100    set_scene_state( setup, SETUP_ACTIVE );
 101    lp_setup_choose_point( setup );
 102    setup->point( setup, v0 );
 103 }
 104
 105 static void reset_context( struct lp_setup_context *setup )
 106 {
 107    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 108
 109    /* Reset derived state */
 110    setup->constants.stored_size = 0;
 111    setup->constants.stored_data = NULL;
 112    setup->fs.stored = NULL;
 113    setup->dirty = ~0;
 114
 115    /* no current bin */
 116    setup->scene = NULL;
 117
 118    /* Reset some state:
 119     */
 120    setup->clear.flags = 0;
 121
 122    /* Have an explicit "start-binning" call and get rid of this
 123     * pointer twiddling?
 124     */
 125    setup->line = first_line;
 126    setup->point = first_point;
 127    setup->triangle = first_triangle;
 128 }
 129
 130
 131 /** Rasterize all scene's bins */
 132 static void
 133 lp_setup_rasterize_scene( struct lp_setup_context *setup,
 134                           boolean write_depth )
 135 {
 136    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 137
 138    lp_scene_rasterize(scene,
 139                       setup->rast,
 140                       write_depth);
 141
 142    reset_context( setup );
 143
 144    LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
 145 }
 146
 147
 148
 149 static void
 150 begin_binning( struct lp_setup_context *setup )
 151 {
 152    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 153
 154    LP_DBG(DEBUG_SETUP, "%s color: %s depth: %s\n", __FUNCTION__,
 155           (setup->clear.flags & PIPE_CLEAR_COLOR) ? "clear": "load",
 156           (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) ? "clear": "load");
 157
 158    if (setup->fb.nr_cbufs) {
 159       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 160          lp_scene_bin_everywhere( scene,
 161                                   lp_rast_clear_color,
 162                                   setup->clear.color );
 163       else
 164          lp_scene_bin_everywhere( scene,
 165                                   lp_rast_load_color,
 166                                   lp_rast_arg_null() );
 167    }
 168
 169    if (setup->fb.zsbuf) {
 170       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 171          lp_scene_bin_everywhere( scene,
 172                                   lp_rast_clear_zstencil,
 173                                   setup->clear.zstencil );
 174    }
 175
 176    LP_DBG(DEBUG_SETUP, "%s done\n", __FUNCTION__);
 177 }
 178
 179
 180 /* This basically bins and then flushes any outstanding full-screen
 181  * clears.
 182  *
 183  * TODO: fast path for fullscreen clears and no triangles.
 184  */
 185 static void
 186 execute_clears( struct lp_setup_context *setup )
 187 {
 188    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 189
 190    begin_binning( setup );
 191    lp_setup_rasterize_scene( setup, TRUE );
 192 }
 193
 194
 195 static void
 196 set_scene_state( struct lp_setup_context *setup,
 197            unsigned new_state )
 198 {
 199    unsigned old_state = setup->state;
 200
 201    if (old_state == new_state)
 202       return;
 203
 204    LP_DBG(DEBUG_SETUP, "%s old %d new %d\n", __FUNCTION__, old_state, new_state);
 205
 206    switch (new_state) {
 207    case SETUP_ACTIVE:
 208       begin_binning( setup );
 209       break;
 210
 211    case SETUP_CLEARED:
 212       if (old_state == SETUP_ACTIVE) {
 213          assert(0);
 214          return;
 215       }
 216       break;
 217
 218    case SETUP_FLUSHED:
 219       if (old_state == SETUP_CLEARED)
 220          execute_clears( setup );
 221       else
 222          lp_setup_rasterize_scene( setup, TRUE );
 223       break;
 224    }
 225
 226    setup->state = new_state;
 227 }
 228
 229
 230 void
 231 lp_setup_flush( struct lp_setup_context *setup,
 232                 unsigned flags )
 233 {
 234    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 235
 236    set_scene_state( setup, SETUP_FLUSHED );
 237 }
 238
 239
 240 void
 241 lp_setup_bind_framebuffer( struct lp_setup_context *setup,
 242                            const struct pipe_framebuffer_state *fb )
 243 {
 244    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 245
 246    /* Flush any old scene.
 247     */
 248    set_scene_state( setup, SETUP_FLUSHED );
 249
 250    /* Set new state.  This will be picked up later when we next need a
 251     * scene.
 252     */
 253    util_copy_framebuffer_state(&setup->fb, fb);
 254 }
 255
 256
 257 void
 258 lp_setup_clear( struct lp_setup_context *setup,
 259                 const float *color,
 260                 double depth,
 261                 unsigned stencil,
 262                 unsigned flags )
 263 {
 264    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 265    unsigned i;
 266
 267    LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
 268
 269
 270    if (flags & PIPE_CLEAR_COLOR) {
 271       for (i = 0; i < 4; ++i)
 272          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 273    }
 274
 275    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 276       setup->clear.zstencil.clear_zstencil =
 277          util_pack_z_stencil(setup->fb.zsbuf->format,
 278                              depth,
 279                              stencil);
 280    }
 281
 282    if (setup->state == SETUP_ACTIVE) {
 283       /* Add the clear to existing scene.  In the unusual case where
 284        * both color and depth-stencil are being cleared when there's
 285        * already been some rendering, we could discard the currently
 286        * binned scene and start again, but I don't see that as being
 287        * a common usage.
 288        */
 289       if (flags & PIPE_CLEAR_COLOR)
 290          lp_scene_bin_everywhere( scene,
 291                                   lp_rast_clear_color,
 292                                   setup->clear.color );
 293
 294       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 295          lp_scene_bin_everywhere( scene,
 296                                   lp_rast_clear_zstencil,
 297                                   setup->clear.zstencil );
 298    }
 299    else {
 300       /* Put ourselves into the 'pre-clear' state, specifically to try
 301        * and accumulate multiple clears to color and depth_stencil
 302        * buffers which the app or state-tracker might issue
 303        * separately.
 304        */
 305       set_scene_state( setup, SETUP_CLEARED );
 306
 307       setup->clear.flags |= flags;
 308    }
 309 }
 310
 311
 312 /**
 313  * Emit a fence.
 314  */
 315 struct pipe_fence_handle *
 316 lp_setup_fence( struct lp_setup_context *setup )
 317 {
 318    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 319    const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
 320    struct lp_fence *fence = lp_fence_create(rank);
 321
 322    LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
 323
 324    set_scene_state( setup, SETUP_ACTIVE );
 325
 326    /* insert the fence into all command bins */
 327    lp_scene_bin_everywhere( scene,
 328                             lp_rast_fence,
 329                             lp_rast_arg_fence(fence) );
 330
 331    return (struct pipe_fence_handle *) fence;
 332 }
 333
 334
 335 void
 336 lp_setup_set_triangle_state( struct lp_setup_context *setup,
 337                              unsigned cull_mode,
 338                              boolean ccw_is_frontface,
 339                              boolean scissor,
 340                              boolean gl_rasterization_rules)
 341 {
 342    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 343
 344    setup->ccw_is_frontface = ccw_is_frontface;
 345    setup->cullmode = cull_mode;
 346    setup->triangle = first_triangle;
 347    setup->scissor_test = scissor;
 348    setup->pixel_offset = gl_rasterization_rules ? 0.5f : 0.0f;
 349 }
 350
 351
 352
 353 void
 354 lp_setup_set_fs_inputs( struct lp_setup_context *setup,
 355                         const struct lp_shader_input *input,
 356                         unsigned nr )
 357 {
 358    LP_DBG(DEBUG_SETUP, "%s %p %u\n", __FUNCTION__, (void *) input, nr);
 359
 360    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 361    setup->fs.nr_inputs = nr;
 362 }
 363
 364 void
 365 lp_setup_set_fs_functions( struct lp_setup_context *setup,
 366                            lp_jit_frag_func jit_function0,
 367                            lp_jit_frag_func jit_function1,
 368                            boolean opaque )
 369 {
 370    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function0);
 371    /* FIXME: reference count */
 372
 373    setup->fs.current.jit_function[0] = jit_function0;
 374    setup->fs.current.jit_function[1] = jit_function1;
 375    setup->fs.current.opaque = opaque;
 376    setup->dirty |= LP_SETUP_NEW_FS;
 377 }
 378
 379 void
 380 lp_setup_set_fs_constants(struct lp_setup_context *setup,
 381                           struct pipe_resource *buffer)
 382 {
 383    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) buffer);
 384
 385    pipe_resource_reference(&setup->constants.current, buffer);
 386
 387    setup->dirty |= LP_SETUP_NEW_CONSTANTS;
 388 }
 389
 390
 391 void
 392 lp_setup_set_alpha_ref_value( struct lp_setup_context *setup,
 393                               float alpha_ref_value )
 394 {
 395    LP_DBG(DEBUG_SETUP, "%s %f\n", __FUNCTION__, alpha_ref_value);
 396
 397    if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
 398       setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
 399       setup->dirty |= LP_SETUP_NEW_FS;
 400    }
 401 }
 402
 403 void
 404 lp_setup_set_stencil_ref_values( struct lp_setup_context *setup,
 405                                  const ubyte refs[2] )
 406 {
 407    LP_DBG(DEBUG_SETUP, "%s %d %d\n", __FUNCTION__, refs[0], refs[1]);
 408
 409    if (setup->fs.current.jit_context.stencil_ref_front != refs[0] ||
 410        setup->fs.current.jit_context.stencil_ref_back != refs[1]) {
 411       setup->fs.current.jit_context.stencil_ref_front = refs[0];
 412       setup->fs.current.jit_context.stencil_ref_back = refs[1];
 413       setup->dirty |= LP_SETUP_NEW_FS;
 414    }
 415 }
 416
 417 void
 418 lp_setup_set_blend_color( struct lp_setup_context *setup,
 419                           const struct pipe_blend_color *blend_color )
 420 {
 421    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 422
 423    assert(blend_color);
 424
 425    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 426       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 427       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 428    }
 429 }
 430
 431
 432 void
 433 lp_setup_set_scissor( struct lp_setup_context *setup,
 434                       const struct pipe_scissor_state *scissor )
 435 {
 436    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 437
 438    assert(scissor);
 439
 440    if (memcmp(&setup->scissor.current, scissor, sizeof(*scissor)) != 0) {
 441       setup->scissor.current = *scissor; /* struct copy */
 442       setup->dirty |= LP_SETUP_NEW_SCISSOR;
 443    }
 444 }
 445
 446
 447 void
 448 lp_setup_set_flatshade_first( struct lp_setup_context *setup,
 449                               boolean flatshade_first )
 450 {
 451    setup->flatshade_first = flatshade_first;
 452 }
 453
 454
 455 void
 456 lp_setup_set_vertex_info( struct lp_setup_context *setup,
 457                           struct vertex_info *vertex_info )
 458 {
 459    /* XXX: just silently holding onto the pointer:
 460     */
 461    setup->vertex_info = vertex_info;
 462 }
 463
 464
 465 /**
 466  * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
 467  */
 468 void
 469 lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
 470                                     unsigned num,
 471                                     struct pipe_sampler_view **views)
 472 {
 473    unsigned i;
 474
 475    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 476
 477    assert(num <= PIPE_MAX_SAMPLERS);
 478
 479    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 480       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 481
 482       if(view) {
 483          struct pipe_resource *tex = view->texture;
 484          struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
 485          struct lp_jit_texture *jit_tex;
 486          jit_tex = &setup->fs.current.jit_context.textures[i];
 487          jit_tex->width = tex->width0;
 488          jit_tex->height = tex->height0;
 489          jit_tex->depth = tex->depth0;
 490          jit_tex->last_level = tex->last_level;
 491
 492          /* We're referencing the texture's internal data, so save a
 493           * reference to it.
 494           */
 495          pipe_resource_reference(&setup->fs.current_tex[i], tex);
 496
 497          if (!lp_tex->dt) {
 498             /* regular texture - setup array of mipmap level pointers */
 499             int j;
 500             for (j = 0; j <= tex->last_level; j++) {
 501                jit_tex->data[j] =
 502                   (ubyte *) lp_tex->data + lp_tex->level_offset[j];
 503                jit_tex->row_stride[j] = lp_tex->stride[j];
 504             }
 505          }
 506          else {
 507             /* display target texture/surface */
 508             /*
 509              * XXX: Where should this be unmapped?
 510              */
 511
 512             struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
 513             struct sw_winsys *winsys = screen->winsys;
 514             jit_tex->data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
 515                                                          PIPE_TRANSFER_READ);
 516             jit_tex->row_stride[0] = lp_tex->stride[0];
 517             assert(jit_tex->data[0]);
 518          }
 519       }
 520    }
 521
 522    setup->dirty |= LP_SETUP_NEW_FS;
 523 }
 524
 525
 526 /**
 527  * Is the given texture referenced by any scene?
 528  * Note: we have to check all scenes including any scenes currently
 529  * being rendered and the current scene being built.
 530  */
 531 unsigned
 532 lp_setup_is_resource_referenced( const struct lp_setup_context *setup,
 533                                 const struct pipe_resource *texture )
 534 {
 535    unsigned i;
 536
 537    /* check the render targets */
 538    for (i = 0; i < setup->fb.nr_cbufs; i++) {
 539       if (setup->fb.cbufs[i]->texture == texture)
 540          return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 541    }
 542    if (setup->fb.zsbuf && setup->fb.zsbuf->texture == texture) {
 543       return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 544    }
 545
 546    /* check textures referenced by the scene */
 547    for (i = 0; i < Elements(setup->scenes); i++) {
 548       if (lp_scene_is_resource_referenced(setup->scenes[i], texture)) {
 549          return PIPE_REFERENCED_FOR_READ;
 550       }
 551    }
 552
 553    return PIPE_UNREFERENCED;
 554 }
 555
 556
 557 /**
 558  * Called by vbuf code when we're about to draw something.
 559  */
 560 void
 561 lp_setup_update_state( struct lp_setup_context *setup )
 562 {
 563    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 564
 565    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 566
 567    assert(setup->fs.current.jit_function);
 568
 569    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 570       uint8_t *stored;
 571       unsigned i, j;
 572
 573       stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
 574
 575       /* smear each blend color component across 16 ubyte elements */
 576       for (i = 0; i < 4; ++i) {
 577          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 578          for (j = 0; j < 16; ++j)
 579             stored[i*16 + j] = c;
 580       }
 581
 582       setup->blend_color.stored = stored;
 583
 584       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 585       setup->dirty |= LP_SETUP_NEW_FS;
 586    }
 587
 588    if (setup->dirty & LP_SETUP_NEW_SCISSOR) {
 589       float *stored;
 590
 591       stored = lp_scene_alloc_aligned(scene, 4 * sizeof(int32_t), 16);
 592
 593       stored[0] = (float) setup->scissor.current.minx;
 594       stored[1] = (float) setup->scissor.current.miny;
 595       stored[2] = (float) setup->scissor.current.maxx;
 596       stored[3] = (float) setup->scissor.current.maxy;
 597
 598       setup->scissor.stored = stored;
 599
 600       setup->fs.current.jit_context.scissor_xmin = stored[0];
 601       setup->fs.current.jit_context.scissor_ymin = stored[1];
 602       setup->fs.current.jit_context.scissor_xmax = stored[2];
 603       setup->fs.current.jit_context.scissor_ymax = stored[3];
 604
 605       setup->dirty |= LP_SETUP_NEW_FS;
 606    }
 607
 608    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 609       struct pipe_resource *buffer = setup->constants.current;
 610
 611       if(buffer) {
 612          unsigned current_size = buffer->width0;
 613          const void *current_data = llvmpipe_resource(buffer)->data;
 614
 615          /* TODO: copy only the actually used constants? */
 616
 617          if(setup->constants.stored_size != current_size ||
 618             !setup->constants.stored_data ||
 619             memcmp(setup->constants.stored_data,
 620                    current_data,
 621                    current_size) != 0) {
 622             void *stored;
 623
 624             stored = lp_scene_alloc(scene, current_size);
 625             if(stored) {
 626                memcpy(stored,
 627                       current_data,
 628                       current_size);
 629                setup->constants.stored_size = current_size;
 630                setup->constants.stored_data = stored;
 631             }
 632          }
 633       }
 634       else {
 635          setup->constants.stored_size = 0;
 636          setup->constants.stored_data = NULL;
 637       }
 638
 639       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 640       setup->dirty |= LP_SETUP_NEW_FS;
 641    }
 642
 643
 644    if(setup->dirty & LP_SETUP_NEW_FS) {
 645       if(!setup->fs.stored ||
 646          memcmp(setup->fs.stored,
 647                 &setup->fs.current,
 648                 sizeof setup->fs.current) != 0) {
 649          /* The fs state that's been stored in the scene is different from
 650           * the new, current state.  So allocate a new lp_rast_state object
 651           * and append it to the bin's setup data buffer.
 652           */
 653          uint i;
 654          struct lp_rast_state *stored =
 655             (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
 656          if(stored) {
 657             memcpy(stored,
 658                    &setup->fs.current,
 659                    sizeof setup->fs.current);
 660             setup->fs.stored = stored;
 661
 662             /* put the state-set command into all bins */
 663             lp_scene_bin_state_command( scene,
 664                                         lp_rast_set_state,
 665                                         lp_rast_arg_state(setup->fs.stored) );
 666          }
 667
 668          /* The scene now references the textures in the rasterization
 669           * state record.  Note that now.
 670           */
 671          for (i = 0; i < Elements(setup->fs.current_tex); i++) {
 672             if (setup->fs.current_tex[i])
 673                lp_scene_texture_reference(scene, setup->fs.current_tex[i]);
 674          }
 675       }
 676    }
 677
 678    setup->dirty = 0;
 679
 680    assert(setup->fs.stored);
 681 }
 682
 683
 684
 685 /* Only caller is lp_setup_vbuf_destroy()
 686  */
 687 void
 688 lp_setup_destroy( struct lp_setup_context *setup )
 689 {
 690    uint i;
 691
 692    reset_context( setup );
 693
 694    for (i = 0; i < Elements(setup->fs.current_tex); i++) {
 695       pipe_resource_reference(&setup->fs.current_tex[i], NULL);
 696    }
 697
 698    pipe_resource_reference(&setup->constants.current, NULL);
 699
 700    /* free the scenes in the 'empty' queue */
 701    while (1) {
 702       struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes, FALSE);
 703       if (!scene)
 704          break;
 705       lp_scene_destroy(scene);
 706    }
 707
 708    lp_rast_destroy( setup->rast );
 709
 710    FREE( setup );
 711 }
 712
 713
 714 /**
 715  * Create a new primitive tiling engine.  Plug it into the backend of
 716  * the draw module.  Currently also creates a rasterizer to use with
 717  * it.
 718  */
 719 struct lp_setup_context *
 720 lp_setup_create( struct pipe_context *pipe,
 721                  struct draw_context *draw )
 722 {
 723    unsigned i;
 724    struct lp_setup_context *setup = CALLOC_STRUCT(lp_setup_context);
 725
 726    if (!setup)
 727       return NULL;
 728
 729    lp_setup_init_vbuf(setup);
 730
 731    setup->empty_scenes = lp_scene_queue_create();
 732    if (!setup->empty_scenes)
 733       goto fail;
 734
 735    /* XXX: move this to the screen and share between contexts:
 736     */
 737    setup->rast = lp_rast_create();
 738    if (!setup->rast)
 739       goto fail;
 740
 741    setup->vbuf = draw_vbuf_stage(draw, &setup->base);
 742    if (!setup->vbuf)
 743       goto fail;
 744
 745    draw_set_rasterize_stage(draw, setup->vbuf);
 746    draw_set_render(draw, &setup->base);
 747
 748    /* create some empty scenes */
 749    for (i = 0; i < MAX_SCENES; i++) {
 750       setup->scenes[i] = lp_scene_create( pipe, setup->empty_scenes );
 751
 752       lp_scene_enqueue(setup->empty_scenes, setup->scenes[i]);
 753    }
 754
 755    setup->triangle = first_triangle;
 756    setup->line     = first_line;
 757    setup->point    = first_point;
 758
 759    setup->dirty = ~0;
 760
 761    return setup;
 762
 763 fail:
 764    if (setup->rast)
 765       lp_rast_destroy( setup->rast );
 766
 767    if (setup->vbuf)
 768       ;
 769
 770    if (setup->empty_scenes)
 771       lp_scene_queue_destroy(setup->empty_scenes);
 772
 773    FREE(setup);
 774    return NULL;
 775 }
 776