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_math.h"
  38 #include "util/u_memory.h"
  39 #include "util/u_pack_color.h"
  40 #include "lp_state.h"
  41 #include "lp_buffer.h"
  42 #include "lp_texture.h"
  43 #include "lp_setup_context.h"
  44
  45 #define SETUP_DEBUG debug_printf
  46
  47 static void set_state( struct setup_context *, unsigned );
  48
  49 void lp_setup_new_cmd_block( struct cmd_block_list *list )
  50 {
  51    struct cmd_block *block = MALLOC_STRUCT(cmd_block);
  52    list->tail->next = block;
  53    list->tail = block;
  54    block->next = NULL;
  55    block->count = 0;
  56 }
  57
  58 void lp_setup_new_data_block( struct data_block_list *list )
  59 {
  60    struct data_block *block = MALLOC_STRUCT(data_block);
  61    list->tail->next = block;
  62    list->tail = block;
  63    block->next = NULL;
  64    block->used = 0;
  65 }
  66
  67
  68 static void
  69 first_triangle( struct setup_context *setup,
  70                 const float (*v0)[4],
  71                 const float (*v1)[4],
  72                 const float (*v2)[4])
  73 {
  74    set_state( setup, SETUP_ACTIVE );
  75    lp_setup_choose_triangle( setup );
  76    setup->triangle( setup, v0, v1, v2 );
  77 }
  78
  79 static void
  80 first_line( struct setup_context *setup,
  81             const float (*v0)[4],
  82             const float (*v1)[4])
  83 {
  84    set_state( setup, SETUP_ACTIVE );
  85    lp_setup_choose_line( setup );
  86    setup->line( setup, v0, v1 );
  87 }
  88
  89 static void
  90 first_point( struct setup_context *setup,
  91              const float (*v0)[4])
  92 {
  93    set_state( setup, SETUP_ACTIVE );
  94    lp_setup_choose_point( setup );
  95    setup->point( setup, v0 );
  96 }
  97
  98 static void reset_context( struct setup_context *setup )
  99 {
 100    unsigned i, j;
 101
 102    SETUP_DEBUG("%s\n", __FUNCTION__);
 103
 104    /* Reset derived state */
 105    setup->constants.stored_size = 0;
 106    setup->constants.stored_data = NULL;
 107    setup->fs.stored = NULL;
 108    setup->dirty = ~0;
 109
 110    /* Free all but last binner command lists:
 111     */
 112    for (i = 0; i < setup->tiles_x; i++) {
 113       for (j = 0; j < setup->tiles_y; j++) {
 114          struct cmd_block_list *list = &setup->tile[i][j];
 115          struct cmd_block *block;
 116          struct cmd_block *tmp;
 117
 118          for (block = list->head; block != list->tail; block = tmp) {
 119             tmp = block->next;
 120             FREE(block);
 121          }
 122
 123          assert(list->tail->next == NULL);
 124          list->head = list->tail;
 125          list->head->count = 0;
 126       }
 127    }
 128
 129    /* Free all but last binned data block:
 130     */
 131    {
 132       struct data_block_list *list = &setup->data;
 133       struct data_block *block, *tmp;
 134
 135       for (block = list->head; block != list->tail; block = tmp) {
 136          tmp = block->next;
 137          FREE(block);
 138       }
 139
 140       assert(list->tail->next == NULL);
 141       list->head = list->tail;
 142       list->head->used = 0;
 143    }
 144
 145    /* Reset some state:
 146     */
 147    setup->clear.flags = 0;
 148
 149    /* Have an explicit "start-binning" call and get rid of this
 150     * pointer twiddling?
 151     */
 152    setup->line = first_line;
 153    setup->point = first_point;
 154    setup->triangle = first_triangle;
 155 }
 156
 157
 158
 159
 160 /* Add a command to all active bins.
 161  */
 162 static void bin_everywhere( struct setup_context *setup,
 163                             lp_rast_cmd cmd,
 164                             const union lp_rast_cmd_arg arg )
 165 {
 166    unsigned i, j;
 167    for (i = 0; i < setup->tiles_x; i++)
 168       for (j = 0; j < setup->tiles_y; j++)
 169          bin_command( &setup->tile[i][j], cmd, arg );
 170 }
 171
 172
 173 static void
 174 rasterize_bins( struct setup_context *setup,
 175                 boolean write_depth )
 176 {
 177    struct lp_rasterizer *rast = setup->rast;
 178    struct cmd_block *block;
 179    unsigned i,j,k;
 180
 181    SETUP_DEBUG("%s\n", __FUNCTION__);
 182
 183    lp_rast_begin( rast,
 184                   setup->fb.cbuf,
 185                   setup->fb.zsbuf,
 186                   setup->fb.cbuf != NULL,
 187                   setup->fb.zsbuf != NULL && write_depth,
 188                   setup->fb.width,
 189                   setup->fb.height );
 190
 191
 192
 193    for (i = 0; i < setup->tiles_x; i++) {
 194       for (j = 0; j < setup->tiles_y; j++) {
 195
 196          lp_rast_start_tile( rast,
 197                              i * TILE_SIZE,
 198                              j * TILE_SIZE );
 199
 200          for (block = setup->tile[i][j].head; block; block = block->next) {
 201             for (k = 0; k < block->count; k++) {
 202                block->cmd[k]( rast, block->arg[k] );
 203             }
 204          }
 205
 206          lp_rast_end_tile( rast );
 207       }
 208    }
 209
 210    lp_rast_end( rast );
 211
 212    reset_context( setup );
 213 }
 214
 215
 216
 217 static void
 218 begin_binning( struct setup_context *setup )
 219 {
 220    SETUP_DEBUG("%s\n", __FUNCTION__);
 221
 222    if (!setup->fb.cbuf && !setup->fb.zsbuf) {
 223       setup->fb.width = 0;
 224       setup->fb.height = 0;
 225    }
 226    else if (!setup->fb.zsbuf) {
 227       setup->fb.width = setup->fb.cbuf->width;
 228       setup->fb.height = setup->fb.cbuf->height;
 229    }
 230    else if (!setup->fb.cbuf) {
 231       setup->fb.width = setup->fb.zsbuf->width;
 232       setup->fb.height = setup->fb.zsbuf->height;
 233    }
 234    else {
 235       /* XXX: not sure what we're really supposed to do for
 236        * mis-matched color & depth buffer sizes.
 237        */
 238       setup->fb.width = MIN2(setup->fb.cbuf->width,
 239                              setup->fb.zsbuf->width);
 240       setup->fb.height = MIN2(setup->fb.cbuf->height,
 241                               setup->fb.zsbuf->height);
 242    }
 243
 244    setup->tiles_x = align(setup->fb.width, TILE_SIZE) / TILE_SIZE;
 245    setup->tiles_y = align(setup->fb.height, TILE_SIZE) / TILE_SIZE;
 246
 247    if (setup->fb.cbuf) {
 248       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 249          bin_everywhere( setup,
 250                          lp_rast_clear_color,
 251                          setup->clear.color );
 252       else
 253          bin_everywhere( setup, lp_rast_load_color, lp_rast_arg_null() );
 254    }
 255
 256    if (setup->fb.zsbuf) {
 257       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 258          bin_everywhere( setup,
 259                          lp_rast_clear_zstencil,
 260                          setup->clear.zstencil );
 261       else
 262          bin_everywhere( setup, lp_rast_load_zstencil, lp_rast_arg_null() );
 263    }
 264 }
 265
 266
 267 /* This basically bins and then flushes any outstanding full-screen
 268  * clears.
 269  *
 270  * TODO: fast path for fullscreen clears and no triangles.
 271  */
 272 static void
 273 execute_clears( struct setup_context *setup )
 274 {
 275    SETUP_DEBUG("%s\n", __FUNCTION__);
 276
 277    begin_binning( setup );
 278    rasterize_bins( setup, TRUE );
 279 }
 280
 281
 282 static void
 283 set_state( struct setup_context *setup,
 284            unsigned new_state )
 285 {
 286    unsigned old_state = setup->state;
 287
 288    if (old_state == new_state)
 289       return;
 290
 291    SETUP_DEBUG("%s old %d new %d\n", __FUNCTION__, old_state, new_state);
 292
 293    switch (new_state) {
 294    case SETUP_ACTIVE:
 295       begin_binning( setup );
 296       break;
 297
 298    case SETUP_CLEARED:
 299       if (old_state == SETUP_ACTIVE) {
 300          assert(0);
 301          return;
 302       }
 303       break;
 304
 305    case SETUP_FLUSHED:
 306       if (old_state == SETUP_CLEARED)
 307          execute_clears( setup );
 308       else
 309          rasterize_bins( setup, TRUE );
 310       break;
 311    }
 312
 313    setup->state = new_state;
 314 }
 315
 316
 317 void
 318 lp_setup_flush( struct setup_context *setup,
 319                 unsigned flags )
 320 {
 321    SETUP_DEBUG("%s\n", __FUNCTION__);
 322
 323    set_state( setup, SETUP_FLUSHED );
 324 }
 325
 326
 327 void
 328 lp_setup_bind_framebuffer( struct setup_context *setup,
 329                            struct pipe_surface *color,
 330                            struct pipe_surface *zstencil )
 331 {
 332    SETUP_DEBUG("%s\n", __FUNCTION__);
 333
 334    set_state( setup, SETUP_FLUSHED );
 335
 336    pipe_surface_reference( &setup->fb.cbuf, color );
 337    pipe_surface_reference( &setup->fb.zsbuf, zstencil );
 338 }
 339
 340 void
 341 lp_setup_clear( struct setup_context *setup,
 342                 const float *color,
 343                 double depth,
 344                 unsigned stencil,
 345                 unsigned flags )
 346 {
 347    unsigned i;
 348
 349    SETUP_DEBUG("%s state %d\n", __FUNCTION__, setup->state);
 350
 351
 352    if (flags & PIPE_CLEAR_COLOR) {
 353       for (i = 0; i < 4; ++i)
 354          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 355    }
 356
 357    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 358       setup->clear.zstencil.clear_zstencil =
 359          util_pack_z_stencil(setup->fb.zsbuf->format,
 360                              depth,
 361                              stencil);
 362    }
 363
 364    if (setup->state == SETUP_ACTIVE) {
 365       /* Add the clear to existing bins.  In the unusual case where
 366        * both color and depth-stencilare being cleared, we could
 367        * discard the currently binned scene and start again, but I
 368        * don't see that as being a common usage.
 369        */
 370       if (flags & PIPE_CLEAR_COLOR)
 371          bin_everywhere( setup,
 372                          lp_rast_clear_color,
 373                          setup->clear.color );
 374
 375       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 376          bin_everywhere( setup,
 377                          lp_rast_clear_zstencil,
 378                          setup->clear.zstencil );
 379    }
 380    else {
 381       /* Put ourselves into the 'pre-clear' state, specifically to try
 382        * and accumulate multiple clears to color and depth_stencil
 383        * buffers which the app or state-tracker might issue
 384        * separately.
 385        */
 386       set_state( setup, SETUP_CLEARED );
 387
 388       setup->clear.flags |= flags;
 389    }
 390 }
 391
 392
 393
 394 void
 395 lp_setup_set_triangle_state( struct setup_context *setup,
 396                              unsigned cull_mode,
 397                              boolean ccw_is_frontface)
 398 {
 399    SETUP_DEBUG("%s\n", __FUNCTION__);
 400
 401    setup->ccw_is_frontface = ccw_is_frontface;
 402    setup->cullmode = cull_mode;
 403    setup->triangle = first_triangle;
 404 }
 405
 406
 407
 408 void
 409 lp_setup_set_fs_inputs( struct setup_context *setup,
 410                         const struct lp_shader_input *input,
 411                         unsigned nr )
 412 {
 413    SETUP_DEBUG("%s\n", __FUNCTION__);
 414
 415    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 416    setup->fs.nr_inputs = nr;
 417 }
 418
 419 void
 420 lp_setup_set_fs( struct setup_context *setup,
 421                  struct lp_fragment_shader *fs )
 422 {
 423    SETUP_DEBUG("%s\n", __FUNCTION__);
 424    /* FIXME: reference count */
 425
 426    setup->fs.current.jit_function = fs ? fs->current->jit_function : NULL;
 427 }
 428
 429 void
 430 lp_setup_set_fs_constants(struct setup_context *setup,
 431                           struct pipe_buffer *buffer)
 432 {
 433    SETUP_DEBUG("%s\n", __FUNCTION__);
 434
 435    pipe_buffer_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 setup_context *setup,
 443                               float alpha_ref_value )
 444 {
 445    SETUP_DEBUG("%s\n", __FUNCTION__);
 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_blend_color( struct setup_context *setup,
 455                           const struct pipe_blend_color *blend_color )
 456 {
 457    SETUP_DEBUG("%s\n", __FUNCTION__);
 458
 459    assert(blend_color);
 460
 461    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 462       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 463       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 464    }
 465 }
 466
 467 void
 468 lp_setup_set_sampler_textures( struct setup_context *setup,
 469                                unsigned num, struct pipe_texture **texture)
 470 {
 471    struct pipe_texture *dummy;
 472    unsigned i;
 473
 474    SETUP_DEBUG("%s\n", __FUNCTION__);
 475
 476
 477    assert(num <= PIPE_MAX_SAMPLERS);
 478
 479    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 480       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 481
 482       /* FIXME: hold on to the reference */
 483       dummy = NULL;
 484       pipe_texture_reference(&dummy, tex);
 485
 486       if(tex) {
 487          struct llvmpipe_texture *lp_tex = llvmpipe_texture(tex);
 488          struct lp_jit_texture *jit_tex;
 489          jit_tex = &setup->fs.current.jit_context.textures[i];
 490          jit_tex->width = tex->width[0];
 491          jit_tex->height = tex->height[0];
 492          jit_tex->stride = lp_tex->stride[0];
 493          if(!lp_tex->dt)
 494             jit_tex->data = lp_tex->data;
 495          else
 496             /* FIXME: map the rendertarget */
 497             assert(0);
 498       }
 499    }
 500
 501    setup->dirty |= LP_SETUP_NEW_FS;
 502 }
 503
 504 boolean
 505 lp_setup_is_texture_referenced( struct setup_context *setup,
 506                                 const struct pipe_texture *texture )
 507 {
 508    /* FIXME */
 509    return PIPE_UNREFERENCED;
 510 }
 511
 512
 513 static INLINE void
 514 lp_setup_update_shader_state( struct setup_context *setup )
 515 {
 516    SETUP_DEBUG("%s\n", __FUNCTION__);
 517
 518    assert(setup->fs.current.jit_function);
 519
 520    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 521       uint8_t *stored;
 522       unsigned i, j;
 523
 524       stored = get_data_aligned(&setup->data, 4 * 16, 16);
 525
 526       for (i = 0; i < 4; ++i) {
 527          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 528          for (j = 0; j < 16; ++j)
 529             stored[i*4 + j] = c;
 530       }
 531
 532       setup->blend_color.stored = stored;
 533
 534       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 535       setup->dirty |= LP_SETUP_NEW_FS;
 536    }
 537
 538
 539    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 540       struct pipe_buffer *buffer = setup->constants.current;
 541
 542       if(buffer) {
 543          unsigned current_size = buffer->size;
 544          const void *current_data = llvmpipe_buffer(buffer)->data;
 545
 546          /* TODO: copy only the actually used constants? */
 547
 548          if(setup->constants.stored_size != current_size ||
 549             !setup->constants.stored_data ||
 550             memcmp(setup->constants.stored_data,
 551                    current_data,
 552                    current_size) != 0) {
 553             void *stored;
 554
 555             stored = get_data(&setup->data, current_size);
 556             if(stored) {
 557                memcpy(stored,
 558                       current_data,
 559                       current_size);
 560                setup->constants.stored_size = current_size;
 561                setup->constants.stored_data = stored;
 562             }
 563          }
 564       }
 565       else {
 566          setup->constants.stored_size = 0;
 567          setup->constants.stored_data = NULL;
 568       }
 569
 570       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 571       setup->dirty |= LP_SETUP_NEW_FS;
 572    }
 573
 574
 575    if(setup->dirty & LP_SETUP_NEW_FS) {
 576       if(!setup->fs.stored ||
 577          memcmp(setup->fs.stored,
 578                 &setup->fs.current,
 579                 sizeof setup->fs.current) != 0) {
 580          struct lp_rast_state *stored;
 581
 582          stored = get_data(&setup->data, sizeof *stored);
 583          if(stored) {
 584             memcpy(stored,
 585                    &setup->fs.current,
 586                    sizeof setup->fs.current);
 587             setup->fs.stored = stored;
 588          }
 589       }
 590    }
 591
 592    setup->dirty = 0;
 593
 594    assert(setup->fs.stored);
 595 }
 596
 597
 598 /* Stubs for lines & points for now:
 599  */
 600 void
 601 lp_setup_point(struct setup_context *setup,
 602                      const float (*v0)[4])
 603 {
 604    lp_setup_update_shader_state(setup);
 605    setup->point( setup, v0 );
 606 }
 607
 608 void
 609 lp_setup_line(struct setup_context *setup,
 610                     const float (*v0)[4],
 611                     const float (*v1)[4])
 612 {
 613    lp_setup_update_shader_state(setup);
 614    setup->line( setup, v0, v1 );
 615 }
 616
 617 void
 618 lp_setup_tri(struct setup_context *setup,
 619              const float (*v0)[4],
 620              const float (*v1)[4],
 621              const float (*v2)[4])
 622 {
 623    SETUP_DEBUG("%s\n", __FUNCTION__);
 624
 625    lp_setup_update_shader_state(setup);
 626    setup->triangle( setup, v0, v1, v2 );
 627 }
 628
 629
 630 void
 631 lp_setup_destroy( struct setup_context *setup )
 632 {
 633    unsigned i, j;
 634
 635    reset_context( setup );
 636
 637    pipe_buffer_reference(&setup->constants.current, NULL);
 638
 639    for (i = 0; i < TILES_X; i++)
 640       for (j = 0; j < TILES_Y; j++)
 641          FREE(setup->tile[i][j].head);
 642
 643    FREE(setup->data.head);
 644
 645    lp_rast_destroy( setup->rast );
 646    FREE( setup );
 647 }
 648
 649
 650 /**
 651  * Create a new primitive tiling engine.  Currently also creates a
 652  * rasterizer to use with it.
 653  */
 654 struct setup_context *
 655 lp_setup_create( struct pipe_screen *screen )
 656 {
 657    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 658    unsigned i, j;
 659
 660    setup->rast = lp_rast_create( screen );
 661    if (!setup->rast)
 662       goto fail;
 663
 664    for (i = 0; i < TILES_X; i++)
 665       for (j = 0; j < TILES_Y; j++)
 666          setup->tile[i][j].head =
 667             setup->tile[i][j].tail = CALLOC_STRUCT(cmd_block);
 668
 669    setup->data.head =
 670       setup->data.tail = CALLOC_STRUCT(data_block);
 671
 672    setup->triangle = first_triangle;
 673    setup->line     = first_line;
 674    setup->point    = first_point;
 675
 676    setup->dirty = ~0;
 677
 678    return setup;
 679
 680 fail:
 681    FREE(setup);
 682    return NULL;
 683 }
 684