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