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 "pipe/p_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_buffer.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
  49 #include "draw/draw_context.h"
  50 #include "draw/draw_vbuf.h"
  51
  52
  53 static void set_scene_state( struct setup_context *, unsigned );
  54
  55
  56 struct lp_scene *
  57 lp_setup_get_current_scene(struct setup_context *setup)
  58 {
  59    if (!setup->scene) {
  60       /* wait for a free/empty bin */
  61       setup->scene = lp_scene_dequeue(setup->empty_scenes);
  62       if(0)lp_scene_reset( setup->scene ); /* XXX temporary? */
  63
  64       lp_scene_set_framebuffer_size(setup->scene,
  65                                     setup->fb.width,
  66                                     setup->fb.height);
  67    }
  68    return setup->scene;
  69 }
  70
  71
  72 static void
  73 first_triangle( struct setup_context *setup,
  74                 const float (*v0)[4],
  75                 const float (*v1)[4],
  76                 const float (*v2)[4])
  77 {
  78    set_scene_state( setup, SETUP_ACTIVE );
  79    lp_setup_choose_triangle( setup );
  80    setup->triangle( setup, v0, v1, v2 );
  81 }
  82
  83 static void
  84 first_line( struct setup_context *setup,
  85             const float (*v0)[4],
  86             const float (*v1)[4])
  87 {
  88    set_scene_state( setup, SETUP_ACTIVE );
  89    lp_setup_choose_line( setup );
  90    setup->line( setup, v0, v1 );
  91 }
  92
  93 static void
  94 first_point( struct setup_context *setup,
  95              const float (*v0)[4])
  96 {
  97    set_scene_state( setup, SETUP_ACTIVE );
  98    lp_setup_choose_point( setup );
  99    setup->point( setup, v0 );
 100 }
 101
 102 static void reset_context( struct setup_context *setup )
 103 {
 104    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 105
 106    /* Reset derived state */
 107    setup->constants.stored_size = 0;
 108    setup->constants.stored_data = NULL;
 109    setup->fs.stored = NULL;
 110    setup->dirty = ~0;
 111
 112    /* no current bin */
 113    setup->scene = NULL;
 114
 115    /* Reset some state:
 116     */
 117    setup->clear.flags = 0;
 118
 119    /* Have an explicit "start-binning" call and get rid of this
 120     * pointer twiddling?
 121     */
 122    setup->line = first_line;
 123    setup->point = first_point;
 124    setup->triangle = first_triangle;
 125 }
 126
 127
 128 /** Rasterize all scene's bins */
 129 static void
 130 lp_setup_rasterize_scene( struct setup_context *setup,
 131                          boolean write_depth )
 132 {
 133    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 134
 135    lp_rasterize_scene(setup->rast,
 136                       scene,
 137                       &setup->fb,
 138                       write_depth);
 139
 140    reset_context( setup );
 141
 142    LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
 143 }
 144
 145
 146
 147 static void
 148 begin_binning( struct setup_context *setup )
 149 {
 150    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 151
 152    LP_DBG(DEBUG_SETUP, "%s color: %s depth: %s\n", __FUNCTION__,
 153           (setup->clear.flags & PIPE_CLEAR_COLOR) ? "clear": "load",
 154           (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) ? "clear": "load");
 155
 156    if (setup->fb.nr_cbufs) {
 157       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 158          lp_scene_bin_everywhere( scene,
 159                                   lp_rast_clear_color,
 160                                   setup->clear.color );
 161       else
 162          lp_scene_bin_everywhere( scene,
 163                                   lp_rast_load_color,
 164                                   lp_rast_arg_null() );
 165    }
 166
 167    if (setup->fb.zsbuf) {
 168       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 169          lp_scene_bin_everywhere( scene,
 170                                   lp_rast_clear_zstencil,
 171                                   setup->clear.zstencil );
 172       else
 173          lp_scene_bin_everywhere( scene,
 174                                   lp_rast_load_zstencil,
 175                                   lp_rast_arg_null() );
 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 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 setup_context *setup,
 199            unsigned 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
 228    setup->state = new_state;
 229 }
 230
 231
 232 void
 233 lp_setup_flush( struct setup_context *setup,
 234                 unsigned flags )
 235 {
 236    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 237
 238    set_scene_state( setup, SETUP_FLUSHED );
 239 }
 240
 241
 242 void
 243 lp_setup_bind_framebuffer( struct setup_context *setup,
 244                            const struct pipe_framebuffer_state *fb )
 245 {
 246    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 247
 248    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 249
 250    set_scene_state( setup, SETUP_FLUSHED );
 251
 252    /* re-get scene pointer, may have a new scene after flushing */
 253    scene = lp_setup_get_current_scene(setup);
 254
 255    util_copy_framebuffer_state(&setup->fb, fb);
 256
 257    lp_scene_set_framebuffer_size(scene, setup->fb.width, setup->fb.height);
 258 }
 259
 260
 261 void
 262 lp_setup_clear( struct setup_context *setup,
 263                 const float *color,
 264                 double depth,
 265                 unsigned stencil,
 266                 unsigned flags )
 267 {
 268    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 269    unsigned i;
 270
 271    LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
 272
 273
 274    if (flags & PIPE_CLEAR_COLOR) {
 275       for (i = 0; i < 4; ++i)
 276          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 277    }
 278
 279    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 280       setup->clear.zstencil.clear_zstencil =
 281          util_pack_z_stencil(setup->fb.zsbuf->format,
 282                              depth,
 283                              stencil);
 284    }
 285
 286    if (setup->state == SETUP_ACTIVE) {
 287       /* Add the clear to existing scene.  In the unusual case where
 288        * both color and depth-stencil are being cleared when there's
 289        * already been some rendering, we could discard the currently
 290        * binned scene and start again, but I don't see that as being
 291        * a common usage.
 292        */
 293       if (flags & PIPE_CLEAR_COLOR)
 294          lp_scene_bin_everywhere( scene,
 295                                   lp_rast_clear_color,
 296                                   setup->clear.color );
 297
 298       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 299          lp_scene_bin_everywhere( scene,
 300                                   lp_rast_clear_zstencil,
 301                                   setup->clear.zstencil );
 302    }
 303    else {
 304       /* Put ourselves into the 'pre-clear' state, specifically to try
 305        * and accumulate multiple clears to color and depth_stencil
 306        * buffers which the app or state-tracker might issue
 307        * separately.
 308        */
 309       set_scene_state( setup, SETUP_CLEARED );
 310
 311       setup->clear.flags |= flags;
 312    }
 313 }
 314
 315
 316 /**
 317  * Emit a fence.
 318  */
 319 struct pipe_fence_handle *
 320 lp_setup_fence( struct setup_context *setup )
 321 {
 322    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 323    const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
 324    struct lp_fence *fence = lp_fence_create(rank);
 325
 326    LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
 327
 328    set_scene_state( setup, SETUP_ACTIVE );
 329
 330    /* insert the fence into all command bins */
 331    lp_scene_bin_everywhere( scene,
 332                             lp_rast_fence,
 333                             lp_rast_arg_fence(fence) );
 334
 335    return (struct pipe_fence_handle *) fence;
 336 }
 337
 338
 339 void
 340 lp_setup_set_triangle_state( struct setup_context *setup,
 341                              unsigned cull_mode,
 342                              boolean ccw_is_frontface)
 343 {
 344    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 345
 346    setup->ccw_is_frontface = ccw_is_frontface;
 347    setup->cullmode = cull_mode;
 348    setup->triangle = first_triangle;
 349 }
 350
 351
 352
 353 void
 354 lp_setup_set_fs_inputs( struct 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_function( struct setup_context *setup,
 366                           lp_jit_frag_func jit_function,
 367                           boolean opaque )
 368 {
 369    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function);
 370    /* FIXME: reference count */
 371
 372    setup->fs.current.jit_function = jit_function;
 373    setup->fs.current.opaque = opaque;
 374    setup->dirty |= LP_SETUP_NEW_FS;
 375 }
 376
 377 void
 378 lp_setup_set_fs_constants(struct setup_context *setup,
 379                           struct pipe_buffer *buffer)
 380 {
 381    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) buffer);
 382
 383    pipe_buffer_reference(&setup->constants.current, buffer);
 384
 385    setup->dirty |= LP_SETUP_NEW_CONSTANTS;
 386 }
 387
 388
 389 void
 390 lp_setup_set_alpha_ref_value( struct setup_context *setup,
 391                               float alpha_ref_value )
 392 {
 393    LP_DBG(DEBUG_SETUP, "%s %f\n", __FUNCTION__, alpha_ref_value);
 394
 395    if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
 396       setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
 397       setup->dirty |= LP_SETUP_NEW_FS;
 398    }
 399 }
 400
 401 void
 402 lp_setup_set_blend_color( struct setup_context *setup,
 403                           const struct pipe_blend_color *blend_color )
 404 {
 405    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 406
 407    assert(blend_color);
 408
 409    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 410       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 411       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 412    }
 413 }
 414
 415
 416 void
 417 lp_setup_set_flatshade_first( struct setup_context *setup,
 418                               boolean flatshade_first )
 419 {
 420    setup->flatshade_first = flatshade_first;
 421 }
 422
 423
 424 void
 425 lp_setup_set_vertex_info( struct setup_context *setup,
 426                           struct vertex_info *vertex_info )
 427 {
 428    /* XXX: just silently holding onto the pointer:
 429     */
 430    setup->vertex_info = vertex_info;
 431 }
 432
 433
 434 /**
 435  * Called during state validation when LP_NEW_TEXTURE is set.
 436  */
 437 void
 438 lp_setup_set_sampler_textures( struct setup_context *setup,
 439                                unsigned num, struct pipe_texture **texture)
 440 {
 441    unsigned i;
 442
 443    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 444
 445    assert(num <= PIPE_MAX_SAMPLERS);
 446
 447    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 448       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 449
 450       if(tex) {
 451          struct llvmpipe_texture *lp_tex = llvmpipe_texture(tex);
 452          struct lp_jit_texture *jit_tex;
 453          jit_tex = &setup->fs.current.jit_context.textures[i];
 454          jit_tex->width = tex->width0;
 455          jit_tex->height = tex->height0;
 456          jit_tex->stride = lp_tex->stride[0];
 457          if(!lp_tex->dt)
 458             jit_tex->data = lp_tex->data;
 459          else
 460             /* FIXME: map the rendertarget */
 461             assert(0);
 462
 463          /* the scene references this texture */
 464          {
 465             struct lp_scene *scene = lp_setup_get_current_scene(setup);
 466             lp_scene_texture_reference(scene, tex);
 467          }
 468       }
 469    }
 470
 471    setup->dirty |= LP_SETUP_NEW_FS;
 472 }
 473
 474
 475 /**
 476  * Is the given texture referenced by any scene?
 477  * Note: we have to check all scenes including any scenes currently
 478  * being rendered and the current scene being built.
 479  */
 480 boolean
 481 lp_setup_is_texture_referenced( const struct setup_context *setup,
 482                                 const struct pipe_texture *texture )
 483 {
 484    unsigned i;
 485    for (i = 0; i < Elements(setup->scenes); i++) {
 486       if (lp_scene_is_textured_referenced(setup->scenes[i], texture)) {
 487          return PIPE_REFERENCED_FOR_READ;
 488       }
 489    }
 490
 491    /* check the render targets */
 492    for (i = 0; i < setup->fb.nr_cbufs; i++) {
 493       if (setup->fb.cbufs[i]->texture == texture)
 494          return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 495    }
 496    if (setup->fb.zsbuf && setup->fb.zsbuf->texture == texture)
 497       return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;
 498
 499    return PIPE_UNREFERENCED;
 500 }
 501
 502
 503 /**
 504  * Called by vbuf code when we're about to draw something.
 505  */
 506 void
 507 lp_setup_update_state( struct setup_context *setup )
 508 {
 509    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 510
 511    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 512
 513    assert(setup->fs.current.jit_function);
 514
 515    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 516       uint8_t *stored;
 517       unsigned i, j;
 518
 519       stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
 520
 521       /* smear each blend color component across 16 ubyte elements */
 522       for (i = 0; i < 4; ++i) {
 523          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 524          for (j = 0; j < 16; ++j)
 525             stored[i*16 + j] = c;
 526       }
 527
 528       setup->blend_color.stored = stored;
 529
 530       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 531       setup->dirty |= LP_SETUP_NEW_FS;
 532    }
 533
 534
 535    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 536       struct pipe_buffer *buffer = setup->constants.current;
 537
 538       if(buffer) {
 539          unsigned current_size = buffer->size;
 540          const void *current_data = llvmpipe_buffer(buffer)->data;
 541
 542          /* TODO: copy only the actually used constants? */
 543
 544          if(setup->constants.stored_size != current_size ||
 545             !setup->constants.stored_data ||
 546             memcmp(setup->constants.stored_data,
 547                    current_data,
 548                    current_size) != 0) {
 549             void *stored;
 550
 551             stored = lp_scene_alloc(scene, current_size);
 552             if(stored) {
 553                memcpy(stored,
 554                       current_data,
 555                       current_size);
 556                setup->constants.stored_size = current_size;
 557                setup->constants.stored_data = stored;
 558             }
 559          }
 560       }
 561       else {
 562          setup->constants.stored_size = 0;
 563          setup->constants.stored_data = NULL;
 564       }
 565
 566       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 567       setup->dirty |= LP_SETUP_NEW_FS;
 568    }
 569
 570
 571    if(setup->dirty & LP_SETUP_NEW_FS) {
 572       if(!setup->fs.stored ||
 573          memcmp(setup->fs.stored,
 574                 &setup->fs.current,
 575                 sizeof setup->fs.current) != 0) {
 576          /* The fs state that's been stored in the scene is different from
 577           * the new, current state.  So allocate a new lp_rast_state object
 578           * and append it to the bin's setup data buffer.
 579           */
 580          struct lp_rast_state *stored =
 581             (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
 582          if(stored) {
 583             memcpy(stored,
 584                    &setup->fs.current,
 585                    sizeof setup->fs.current);
 586             setup->fs.stored = stored;
 587
 588             /* put the state-set command into all bins */
 589             lp_scene_bin_state_command( scene,
 590                                         lp_rast_set_state,
 591                                         lp_rast_arg_state(setup->fs.stored) );
 592          }
 593       }
 594    }
 595
 596    setup->dirty = 0;
 597
 598    assert(setup->fs.stored);
 599 }
 600
 601
 602
 603 /* Only caller is lp_setup_vbuf_destroy()
 604  */
 605 void
 606 lp_setup_destroy( struct setup_context *setup )
 607 {
 608    reset_context( setup );
 609
 610    pipe_buffer_reference(&setup->constants.current, NULL);
 611
 612    /* free the scenes in the 'empty' queue */
 613    while (lp_scene_queue_count(setup->empty_scenes) > 0) {
 614       struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes);
 615       if (!scene)
 616          break;
 617       lp_scene_destroy(scene);
 618    }
 619
 620    lp_rast_destroy( setup->rast );
 621
 622    FREE( setup );
 623 }
 624
 625
 626 /**
 627  * Create a new primitive tiling engine.  Plug it into the backend of
 628  * the draw module.  Currently also creates a rasterizer to use with
 629  * it.
 630  */
 631 struct setup_context *
 632 lp_setup_create( struct pipe_screen *screen,
 633                  struct draw_context *draw )
 634 {
 635    unsigned i;
 636    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 637
 638    if (!setup)
 639       return NULL;
 640
 641    lp_setup_init_vbuf(setup);
 642
 643    setup->empty_scenes = lp_scene_queue_create();
 644    if (!setup->empty_scenes)
 645       goto fail;
 646
 647    setup->rast = lp_rast_create( screen, setup->empty_scenes );
 648    if (!setup->rast)
 649       goto fail;
 650
 651    setup->vbuf = draw_vbuf_stage(draw, &setup->base);
 652    if (!setup->vbuf)
 653       goto fail;
 654
 655    draw_set_rasterize_stage(draw, setup->vbuf);
 656    draw_set_render(draw, &setup->base);
 657
 658    /* create some empty scenes */
 659    for (i = 0; i < MAX_SCENES; i++) {
 660       setup->scenes[i] = lp_scene_create();
 661       lp_scene_enqueue(setup->empty_scenes, setup->scenes[i]);
 662    }
 663
 664    setup->triangle = first_triangle;
 665    setup->line     = first_line;
 666    setup->point    = first_point;
 667
 668    setup->dirty = ~0;
 669
 670    return setup;
 671
 672 fail:
 673    if (setup->rast)
 674       lp_rast_destroy( setup->rast );
 675
 676    if (setup->vbuf)
 677       ;
 678
 679    if (setup->empty_scenes)
 680       lp_scene_queue_destroy(setup->empty_scenes);
 681
 682    FREE(setup);
 683    return NULL;
 684 }
 685