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_context.h"
  41 #include "lp_scene.h"
  42 #include "lp_scene_queue.h"
  43 #include "lp_texture.h"
  44 #include "lp_debug.h"
  45 #include "lp_fence.h"
  46 #include "lp_rast.h"
  47 #include "lp_setup_context.h"
  48 #include "lp_screen.h"
  49 #include "lp_state.h"
  50 #include "state_tracker/sw_winsys.h"
  51
  52 #include "draw/draw_context.h"
  53 #include "draw/draw_vbuf.h"
  54
  55
  56 static void set_scene_state( struct lp_setup_context *, enum setup_state );
  57
  58
  59 struct lp_scene *
  60 lp_setup_get_current_scene(struct lp_setup_context *setup)
  61 {
  62    if (!setup->scene) {
  63
  64       /* wait for a free/empty scene
  65        */
  66       setup->scene = lp_scene_dequeue(setup->empty_scenes, TRUE);
  67
  68       assert(lp_scene_is_empty(setup->scene));
  69
  70       lp_scene_begin_binning(setup->scene,
  71                              &setup->fb );
  72    }
  73    return setup->scene;
  74 }
  75
  76
  77 /**
  78  * Check if the size of the current scene has exceeded the limit.
  79  * If so, flush/render it.
  80  */
  81 static void
  82 setup_check_scene_size_and_flush(struct lp_setup_context *setup)
  83 {
  84    if (setup->scene) {
  85       struct lp_scene *scene = lp_setup_get_current_scene(setup);
  86       unsigned size = lp_scene_get_size(scene);
  87
  88       if (size > LP_MAX_SCENE_SIZE) {
  89          /*printf("LLVMPIPE: scene size = %u, flushing.\n", size);*/
  90          set_scene_state( setup, SETUP_FLUSHED );
  91          /*assert(lp_scene_get_size(scene) == 0);*/
  92       }
  93    }
  94 }
  95
  96
  97 static void
  98 first_triangle( struct lp_setup_context *setup,
  99                 const float (*v0)[4],
 100                 const float (*v1)[4],
 101                 const float (*v2)[4])
 102 {
 103    set_scene_state( setup, SETUP_ACTIVE );
 104    lp_setup_choose_triangle( setup );
 105    setup->triangle( setup, v0, v1, v2 );
 106 }
 107
 108 static void
 109 first_line( struct lp_setup_context *setup,
 110             const float (*v0)[4],
 111             const float (*v1)[4])
 112 {
 113    set_scene_state( setup, SETUP_ACTIVE );
 114    lp_setup_choose_line( setup );
 115    setup->line( setup, v0, v1 );
 116 }
 117
 118 static void
 119 first_point( struct lp_setup_context *setup,
 120              const float (*v0)[4])
 121 {
 122    set_scene_state( setup, SETUP_ACTIVE );
 123    lp_setup_choose_point( setup );
 124    setup->point( setup, v0 );
 125 }
 126
 127 static void reset_context( struct lp_setup_context *setup )
 128 {
 129    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 130
 131    /* Reset derived state */
 132    setup->constants.stored_size = 0;
 133    setup->constants.stored_data = NULL;
 134    setup->fs.stored = NULL;
 135    setup->dirty = ~0;
 136
 137    /* no current bin */
 138    setup->scene = NULL;
 139
 140    /* Reset some state:
 141     */
 142    setup->clear.flags = 0;
 143
 144    /* Have an explicit "start-binning" call and get rid of this
 145     * pointer twiddling?
 146     */
 147    setup->line = first_line;
 148    setup->point = first_point;
 149    setup->triangle = first_triangle;
 150 }
 151
 152
 153 /** Rasterize all scene's bins */
 154 static void
 155 lp_setup_rasterize_scene( struct lp_setup_context *setup )
 156 {
 157    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 158
 159    lp_scene_rasterize(scene, setup->rast);
 160
 161    reset_context( setup );
 162
 163    LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
 164 }
 165
 166
 167
 168 static void
 169 begin_binning( struct lp_setup_context *setup )
 170 {
 171    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 172
 173    LP_DBG(DEBUG_SETUP, "%s color: %s depth: %s\n", __FUNCTION__,
 174           (setup->clear.flags & PIPE_CLEAR_COLOR) ? "clear": "load",
 175           (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) ? "clear": "load");
 176
 177    if (setup->fb.nr_cbufs) {
 178       if (setup->clear.flags & PIPE_CLEAR_COLOR) {
 179          lp_scene_bin_everywhere( scene,
 180                                   lp_rast_clear_color,
 181                                   setup->clear.color );
 182          scene->has_color_clear = TRUE;
 183       }
 184    }
 185
 186    if (setup->fb.zsbuf) {
 187       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) {
 188          lp_scene_bin_everywhere( scene,
 189                                   lp_rast_clear_zstencil,
 190                                   setup->clear.zstencil );
 191          scene->has_depth_clear = TRUE;
 192       }
 193    }
 194
 195    LP_DBG(DEBUG_SETUP, "%s done\n", __FUNCTION__);
 196 }
 197
 198
 199 /* This basically bins and then flushes any outstanding full-screen
 200  * clears.
 201  *
 202  * TODO: fast path for fullscreen clears and no triangles.
 203  */
 204 static void
 205 execute_clears( struct lp_setup_context *setup )
 206 {
 207    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 208
 209    begin_binning( setup );
 210    lp_setup_rasterize_scene( setup );
 211 }
 212
 213
 214 static void
 215 set_scene_state( struct lp_setup_context *setup,
 216                  enum setup_state new_state )
 217 {
 218    unsigned old_state = setup->state;
 219
 220    if (old_state == new_state)
 221       return;
 222
 223    LP_DBG(DEBUG_SETUP, "%s old %d new %d\n", __FUNCTION__, old_state, new_state);
 224
 225    switch (new_state) {
 226    case SETUP_ACTIVE:
 227       begin_binning( setup );
 228       break;
 229
 230    case SETUP_CLEARED:
 231       if (old_state == SETUP_ACTIVE) {
 232          assert(0);
 233          return;
 234       }
 235       break;
 236
 237    case SETUP_FLUSHED:
 238       if (old_state == SETUP_CLEARED)
 239          execute_clears( setup );
 240       else
 241          lp_setup_rasterize_scene( setup );
 242       break;
 243
 244    default:
 245       assert(0 && "invalid setup state mode");
 246    }
 247
 248    setup->state = new_state;
 249 }
 250
 251
 252 /**
 253  * \param flags  bitmask of PIPE_FLUSH_x flags
 254  */
 255 void
 256 lp_setup_flush( struct lp_setup_context *setup,
 257                 unsigned flags )
 258 {
 259    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 260
 261    if (setup->scene) {
 262       struct lp_scene *scene = lp_setup_get_current_scene(setup);
 263       union lp_rast_cmd_arg dummy = {0};
 264
 265       if (flags & (PIPE_FLUSH_SWAPBUFFERS |
 266                    PIPE_FLUSH_FRAME)) {
 267          /* Store colors in the linear color buffer(s).
 268           * If we don't do this here, we'll end up converting the tiled
 269           * data to linear in the texture_unmap() function, which will
 270           * not be a parallel/threaded operation as here.
 271           */
 272          lp_scene_bin_everywhere(scene, lp_rast_store_color, dummy);
 273       }
 274    }
 275
 276    set_scene_state( setup, SETUP_FLUSHED );
 277 }
 278
 279
 280 void
 281 lp_setup_bind_framebuffer( struct lp_setup_context *setup,
 282                            const struct pipe_framebuffer_state *fb )
 283 {
 284    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 285
 286    /* Flush any old scene.
 287     */
 288    set_scene_state( setup, SETUP_FLUSHED );
 289
 290    /* Set new state.  This will be picked up later when we next need a
 291     * scene.
 292     */
 293    util_copy_framebuffer_state(&setup->fb, fb);
 294 }
 295
 296
 297 void
 298 lp_setup_clear( struct lp_setup_context *setup,
 299                 const float *color,
 300                 double depth,
 301                 unsigned stencil,
 302                 unsigned flags )
 303 {
 304    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 305    unsigned i;
 306
 307    LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
 308
 309
 310    if (flags & PIPE_CLEAR_COLOR) {
 311       for (i = 0; i < 4; ++i)
 312          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 313    }
 314
 315    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 316       setup->clear.zstencil.clear_zstencil =
 317          util_pack_z_stencil(setup->fb.zsbuf->format,
 318                              depth,
 319                              stencil);
 320    }
 321
 322    if (setup->state == SETUP_ACTIVE) {
 323       /* Add the clear to existing scene.  In the unusual case where
 324        * both color and depth-stencil are being cleared when there's
 325        * already been some rendering, we could discard the currently
 326        * binned scene and start again, but I don't see that as being
 327        * a common usage.
 328        */
 329       if (flags & PIPE_CLEAR_COLOR) {
 330          lp_scene_bin_everywhere( scene,
 331                                   lp_rast_clear_color,
 332                                   setup->clear.color );
 333          scene->has_color_clear = TRUE;
 334       }
 335
 336       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) {
 337          lp_scene_bin_everywhere( scene,
 338                                   lp_rast_clear_zstencil,
 339                                   setup->clear.zstencil );
 340          scene->has_depth_clear = TRUE;
 341       }
 342
 343    }
 344    else {
 345       /* Put ourselves into the 'pre-clear' state, specifically to try
 346        * and accumulate multiple clears to color and depth_stencil
 347        * buffers which the app or state-tracker might issue
 348        * separately.
 349        */
 350       set_scene_state( setup, SETUP_CLEARED );
 351
 352       setup->clear.flags |= flags;
 353    }
 354 }
 355
 356
 357 /**
 358  * Emit a fence.
 359  */
 360 struct pipe_fence_handle *
 361 lp_setup_fence( struct lp_setup_context *setup )
 362 {
 363    if (setup->num_threads == 0) {
 364       return NULL;
 365    }
 366    else {
 367       struct lp_scene *scene = lp_setup_get_current_scene(setup);
 368       const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
 369       struct lp_fence *fence = lp_fence_create(rank);
 370
 371       LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
 372
 373       set_scene_state( setup, SETUP_ACTIVE );
 374
 375       /* insert the fence into all command bins */
 376       lp_scene_bin_everywhere( scene,
 377                                lp_rast_fence,
 378                                lp_rast_arg_fence(fence) );
 379
 380       return (struct pipe_fence_handle *) fence;
 381    }
 382 }
 383
 384
 385 void
 386 lp_setup_set_triangle_state( struct lp_setup_context *setup,
 387                              unsigned cull_mode,
 388                              boolean ccw_is_frontface,
 389                              boolean scissor,
 390                              boolean gl_rasterization_rules)
 391 {
 392    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 393
 394    setup->ccw_is_frontface = ccw_is_frontface;
 395    setup->cullmode = cull_mode;
 396    setup->triangle = first_triangle;
 397    setup->scissor_test = scissor;
 398    setup->pixel_offset = gl_rasterization_rules ? 0.5f : 0.0f;
 399 }
 400
 401
 402
 403 void
 404 lp_setup_set_fs_inputs( struct lp_setup_context *setup,
 405                         const struct lp_shader_input *input,
 406                         unsigned nr )
 407 {
 408    LP_DBG(DEBUG_SETUP, "%s %p %u\n", __FUNCTION__, (void *) input, nr);
 409
 410    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 411    setup->fs.nr_inputs = nr;
 412 }
 413
 414 void
 415 lp_setup_set_fs_functions( struct lp_setup_context *setup,
 416                            lp_jit_frag_func jit_function0,
 417                            lp_jit_frag_func jit_function1,
 418                            boolean opaque )
 419 {
 420    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function0);
 421    /* FIXME: reference count */
 422
 423    setup->fs.current.jit_function[0] = jit_function0;
 424    setup->fs.current.jit_function[1] = jit_function1;
 425    setup->fs.current.opaque = opaque;
 426    setup->dirty |= LP_SETUP_NEW_FS;
 427 }
 428
 429 void
 430 lp_setup_set_fs_constants(struct lp_setup_context *setup,
 431                           struct pipe_resource *buffer)
 432 {
 433    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) buffer);
 434
 435    pipe_resource_reference(&setup->constants.current, buffer);
 436
 437    setup->dirty |= LP_SETUP_NEW_CONSTANTS;
 438 }
 439
 440
 441 void
 442 lp_setup_set_alpha_ref_value( struct lp_setup_context *setup,
 443                               float alpha_ref_value )
 444 {
 445    LP_DBG(DEBUG_SETUP, "%s %f\n", __FUNCTION__, alpha_ref_value);
 446
 447    if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
 448       setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
 449       setup->dirty |= LP_SETUP_NEW_FS;
 450    }
 451 }
 452
 453 void
 454 lp_setup_set_stencil_ref_values( struct lp_setup_context *setup,
 455                                  const ubyte refs[2] )
 456 {
 457    LP_DBG(DEBUG_SETUP, "%s %d %d\n", __FUNCTION__, refs[0], refs[1]);
 458
 459    if (setup->fs.current.jit_context.stencil_ref_front != refs[0] ||
 460        setup->fs.current.jit_context.stencil_ref_back != refs[1]) {
 461       setup->fs.current.jit_context.stencil_ref_front = refs[0];
 462       setup->fs.current.jit_context.stencil_ref_back = refs[1];
 463       setup->dirty |= LP_SETUP_NEW_FS;
 464    }
 465 }
 466
 467 void
 468 lp_setup_set_blend_color( struct lp_setup_context *setup,
 469                           const struct pipe_blend_color *blend_color )
 470 {
 471    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 472
 473    assert(blend_color);
 474
 475    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 476       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 477       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 478    }
 479 }
 480
 481
 482 void
 483 lp_setup_set_scissor( struct lp_setup_context *setup,
 484                       const struct pipe_scissor_state *scissor )
 485 {
 486    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 487
 488    assert(scissor);
 489
 490    if (memcmp(&setup->scissor.current, scissor, sizeof(*scissor)) != 0) {
 491       setup->scissor.current = *scissor; /* struct copy */
 492       setup->dirty |= LP_SETUP_NEW_SCISSOR;
 493    }
 494 }
 495
 496
 497 void
 498 lp_setup_set_flatshade_first( struct lp_setup_context *setup,
 499                               boolean flatshade_first )
 500 {
 501    setup->flatshade_first = flatshade_first;
 502 }
 503
 504
 505 void
 506 lp_setup_set_vertex_info( struct lp_setup_context *setup,
 507                           struct vertex_info *vertex_info )
 508 {
 509    /* XXX: just silently holding onto the pointer:
 510     */
 511    setup->vertex_info = vertex_info;
 512 }
 513
 514
 515 /**
 516  * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
 517  */
 518 void
 519 lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
 520                                     unsigned num,
 521                                     struct pipe_sampler_view **views)
 522 {
 523    unsigned i;
 524
 525    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 526
 527    assert(num <= PIPE_MAX_SAMPLERS);
 528
 529    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 530       struct pipe_sampler_view *view = i < num ? views[i] : NULL;
 531
 532       if(view) {
 533          struct pipe_resource *tex = view->texture;
 534          struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
 535          struct lp_jit_texture *jit_tex;
 536          jit_tex = &setup->fs.current.jit_context.textures[i];
 537          jit_tex->width = tex->width0;
 538          jit_tex->height = tex->height0;
 539          jit_tex->depth = tex->depth0;
 540          jit_tex->last_level = tex->last_level;
 541
 542          /* We're referencing the texture's internal data, so save a
 543           * reference to it.
 544           */
 545          pipe_resource_reference(&setup->fs.current_tex[i], tex);
 546
 547          if (!lp_tex->dt) {
 548             /* regular texture - setup array of mipmap level pointers */
 549             int j;
 550             for (j = 0; j <= tex->last_level; j++) {
 551                jit_tex->data[j] =
 552                   llvmpipe_get_texture_image_all(lp_tex, j, LP_TEX_USAGE_READ,
 553                                                  LP_TEX_LAYOUT_LINEAR);
 554                jit_tex->row_stride[j] = lp_tex->row_stride[j];
 555                jit_tex->img_stride[j] = lp_tex->img_stride[j];
 556             }
 557          }
 558          else {
 559             /* display target texture/surface */
 560             /*
 561              * XXX: Where should this be unmapped?
 562              */
 563
 564             struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
 565             struct sw_winsys *winsys = screen->winsys;
 566             jit_tex->data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
 567                                                          PIPE_TRANSFER_READ);
 568             jit_tex->row_stride[0] = lp_tex->row_stride[0];
 569             jit_tex->img_stride[0] = lp_tex->img_stride[0];
 570             assert(jit_tex->data[0]);
 571          }
 572       }
 573    }
 574
 575    setup->dirty |= LP_SETUP_NEW_FS;
 576 }
 577
 578
 579 /**
 580  * Is the given texture referenced by any scene?
 581  * Note: we have to check all scenes including any scenes currently
 582  * being rendered and the current scene being built.
 583  */
 584 unsigned
 585 lp_setup_is_resource_referenced( const struct lp_setup_context *setup,
 586                                 const struct pipe_resource *texture )
 587 {
 588    unsigned i;
 589
 590    /* check the render targets */
 591    for (i = 0; i < setup->fb.nr_cbufs; i++) {
 592       if (setup->fb.cbufs[i]->texture == texture)
 593          return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 594    }
 595    if (setup->fb.zsbuf && setup->fb.zsbuf->texture == texture) {
 596       return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 597    }
 598
 599    /* check textures referenced by the scene */
 600    for (i = 0; i < Elements(setup->scenes); i++) {
 601       if (lp_scene_is_resource_referenced(setup->scenes[i], texture)) {
 602          return PIPE_REFERENCED_FOR_READ;
 603       }
 604    }
 605
 606    return PIPE_UNREFERENCED;
 607 }
 608
 609
 610 /**
 611  * Called by vbuf code when we're about to draw something.
 612  */
 613 void
 614 lp_setup_update_state( struct lp_setup_context *setup )
 615 {
 616    struct lp_scene *scene;
 617
 618    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 619
 620    setup_check_scene_size_and_flush(setup);
 621
 622    scene = lp_setup_get_current_scene(setup);
 623
 624    assert(setup->fs.current.jit_function);
 625
 626    /* Some of the 'draw' pipeline stages may have changed some driver state.
 627     * Make sure we've processed those state changes before anything else.
 628     *
 629     * XXX this is the only place where llvmpipe_context is used in the
 630     * setup code.  This may get refactored/changed...
 631     */
 632    {
 633       struct llvmpipe_context *lp = llvmpipe_context(scene->pipe);
 634       if (lp->dirty) {
 635          llvmpipe_update_derived(lp);
 636       }
 637       assert(lp->dirty == 0);
 638    }
 639
 640    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 641       uint8_t *stored;
 642       unsigned i, j;
 643
 644       stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
 645
 646       /* smear each blend color component across 16 ubyte elements */
 647       for (i = 0; i < 4; ++i) {
 648          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 649          for (j = 0; j < 16; ++j)
 650             stored[i*16 + j] = c;
 651       }
 652
 653       setup->blend_color.stored = stored;
 654
 655       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 656       setup->dirty |= LP_SETUP_NEW_FS;
 657    }
 658
 659    if (setup->dirty & LP_SETUP_NEW_SCISSOR) {
 660       float *stored;
 661
 662       stored = lp_scene_alloc_aligned(scene, 4 * sizeof(int32_t), 16);
 663
 664       stored[0] = (float) setup->scissor.current.minx;
 665       stored[1] = (float) setup->scissor.current.miny;
 666       stored[2] = (float) setup->scissor.current.maxx;
 667       stored[3] = (float) setup->scissor.current.maxy;
 668
 669       setup->scissor.stored = stored;
 670
 671       setup->fs.current.jit_context.scissor_xmin = stored[0];
 672       setup->fs.current.jit_context.scissor_ymin = stored[1];
 673       setup->fs.current.jit_context.scissor_xmax = stored[2];
 674       setup->fs.current.jit_context.scissor_ymax = stored[3];
 675
 676       setup->dirty |= LP_SETUP_NEW_FS;
 677    }
 678
 679    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 680       struct pipe_resource *buffer = setup->constants.current;
 681
 682       if(buffer) {
 683          unsigned current_size = buffer->width0;
 684          const void *current_data = llvmpipe_resource_data(buffer);
 685
 686          /* TODO: copy only the actually used constants? */
 687
 688          if(setup->constants.stored_size != current_size ||
 689             !setup->constants.stored_data ||
 690             memcmp(setup->constants.stored_data,
 691                    current_data,
 692                    current_size) != 0) {
 693             void *stored;
 694
 695             stored = lp_scene_alloc(scene, current_size);
 696             if(stored) {
 697                memcpy(stored,
 698                       current_data,
 699                       current_size);
 700                setup->constants.stored_size = current_size;
 701                setup->constants.stored_data = stored;
 702             }
 703          }
 704       }
 705       else {
 706          setup->constants.stored_size = 0;
 707          setup->constants.stored_data = NULL;
 708       }
 709
 710       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 711       setup->dirty |= LP_SETUP_NEW_FS;
 712    }
 713
 714
 715    if(setup->dirty & LP_SETUP_NEW_FS) {
 716       if(!setup->fs.stored ||
 717          memcmp(setup->fs.stored,
 718                 &setup->fs.current,
 719                 sizeof setup->fs.current) != 0) {
 720          /* The fs state that's been stored in the scene is different from
 721           * the new, current state.  So allocate a new lp_rast_state object
 722           * and append it to the bin's setup data buffer.
 723           */
 724          uint i;
 725          struct lp_rast_state *stored =
 726             (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
 727          if(stored) {
 728             memcpy(stored,
 729                    &setup->fs.current,
 730                    sizeof setup->fs.current);
 731             setup->fs.stored = stored;
 732
 733             /* put the state-set command into all bins */
 734             lp_scene_bin_state_command( scene,
 735                                         lp_rast_set_state,
 736                                         lp_rast_arg_state(setup->fs.stored) );
 737          }
 738
 739          /* The scene now references the textures in the rasterization
 740           * state record.  Note that now.
 741           */
 742          for (i = 0; i < Elements(setup->fs.current_tex); i++) {
 743             if (setup->fs.current_tex[i])
 744                lp_scene_add_resource_reference(scene, setup->fs.current_tex[i]);
 745          }
 746       }
 747    }
 748
 749    setup->dirty = 0;
 750
 751    assert(setup->fs.stored);
 752 }
 753
 754
 755
 756 /* Only caller is lp_setup_vbuf_destroy()
 757  */
 758 void
 759 lp_setup_destroy( struct lp_setup_context *setup )
 760 {
 761    uint i;
 762
 763    reset_context( setup );
 764
 765    util_unreference_framebuffer_state(&setup->fb);
 766
 767    for (i = 0; i < Elements(setup->fs.current_tex); i++) {
 768       pipe_resource_reference(&setup->fs.current_tex[i], NULL);
 769    }
 770
 771    pipe_resource_reference(&setup->constants.current, NULL);
 772
 773    /* free the scenes in the 'empty' queue */
 774    while (1) {
 775       struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes, FALSE);
 776       if (!scene)
 777          break;
 778       lp_scene_destroy(scene);
 779    }
 780
 781    lp_scene_queue_destroy(setup->empty_scenes);
 782
 783    lp_rast_destroy( setup->rast );
 784
 785    FREE( setup );
 786 }
 787
 788
 789 /**
 790  * Create a new primitive tiling engine.  Plug it into the backend of
 791  * the draw module.  Currently also creates a rasterizer to use with
 792  * it.
 793  */
 794 struct lp_setup_context *
 795 lp_setup_create( struct pipe_context *pipe,
 796                  struct draw_context *draw )
 797 {
 798    struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen);
 799    struct lp_setup_context *setup = CALLOC_STRUCT(lp_setup_context);
 800    unsigned i;
 801
 802    if (!setup)
 803       return NULL;
 804
 805    lp_setup_init_vbuf(setup);
 806
 807    setup->empty_scenes = lp_scene_queue_create();
 808    if (!setup->empty_scenes)
 809       goto fail;
 810
 811    /* XXX: move this to the screen and share between contexts:
 812     */
 813    setup->num_threads = screen->num_threads;
 814    setup->rast = lp_rast_create(screen->num_threads);
 815    if (!setup->rast)
 816       goto fail;
 817
 818    setup->vbuf = draw_vbuf_stage(draw, &setup->base);
 819    if (!setup->vbuf)
 820       goto fail;
 821
 822    draw_set_rasterize_stage(draw, setup->vbuf);
 823    draw_set_render(draw, &setup->base);
 824
 825    /* create some empty scenes */
 826    for (i = 0; i < MAX_SCENES; i++) {
 827       setup->scenes[i] = lp_scene_create( pipe, setup->empty_scenes );
 828
 829       lp_scene_enqueue(setup->empty_scenes, setup->scenes[i]);
 830    }
 831
 832    setup->triangle = first_triangle;
 833    setup->line     = first_line;
 834    setup->point    = first_point;
 835
 836    setup->dirty = ~0;
 837
 838    return setup;
 839
 840 fail:
 841    if (setup->rast)
 842       lp_rast_destroy( setup->rast );
 843
 844    if (setup->vbuf)
 845       ;
 846
 847    if (setup->empty_scenes)
 848       lp_scene_queue_destroy(setup->empty_scenes);
 849
 850    FREE(setup);
 851    return NULL;
 852 }
 853