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 /** Rasterize commands for a single bin */
 174 static void
 175 rasterize_bin( struct lp_rasterizer *rast,
 176                struct cmd_block_list *commands,
 177                int x, int y)
 178 {
 179    struct cmd_block *block;
 180    unsigned k;
 181
 182    lp_rast_start_tile( rast, x, y );
 183
 184    /* simply execute each of the commands in the block list */
 185    for (block = commands->head; block; block = block->next) {
 186       for (k = 0; k < block->count; k++) {
 187          block->cmd[k]( rast, block->arg[k] );
 188       }
 189    }
 190
 191    lp_rast_end_tile( rast );
 192 }
 193
 194
 195 /** Rasterize all tile's bins */
 196 static void
 197 rasterize_bins( struct setup_context *setup,
 198                 boolean write_depth )
 199 {
 200    struct lp_rasterizer *rast = setup->rast;
 201    unsigned i, j;
 202
 203    SETUP_DEBUG("%s\n", __FUNCTION__);
 204
 205    lp_rast_begin( rast,
 206                   setup->fb.cbuf,
 207                   setup->fb.zsbuf,
 208                   setup->fb.cbuf != NULL,
 209                   setup->fb.zsbuf != NULL && write_depth,
 210                   setup->fb.width,
 211                   setup->fb.height );
 212
 213    /* loop over tile bins, rasterize each */
 214    for (i = 0; i < setup->tiles_x; i++) {
 215       for (j = 0; j < setup->tiles_y; j++) {
 216          rasterize_bin( rast, &setup->tile[i][j],
 217                         i * TILE_SIZE,
 218                         j * TILE_SIZE );
 219       }
 220    }
 221
 222    lp_rast_end( rast );
 223
 224    reset_context( setup );
 225
 226    SETUP_DEBUG("%s done \n", __FUNCTION__);
 227 }
 228
 229
 230
 231 static void
 232 begin_binning( struct setup_context *setup )
 233 {
 234    SETUP_DEBUG("%s\n", __FUNCTION__);
 235
 236    if (!setup->fb.cbuf && !setup->fb.zsbuf) {
 237       setup->fb.width = 0;
 238       setup->fb.height = 0;
 239    }
 240    else if (!setup->fb.zsbuf) {
 241       setup->fb.width = setup->fb.cbuf->width;
 242       setup->fb.height = setup->fb.cbuf->height;
 243    }
 244    else if (!setup->fb.cbuf) {
 245       setup->fb.width = setup->fb.zsbuf->width;
 246       setup->fb.height = setup->fb.zsbuf->height;
 247    }
 248    else {
 249       /* XXX: not sure what we're really supposed to do for
 250        * mis-matched color & depth buffer sizes.
 251        */
 252       setup->fb.width = MIN2(setup->fb.cbuf->width,
 253                              setup->fb.zsbuf->width);
 254       setup->fb.height = MIN2(setup->fb.cbuf->height,
 255                               setup->fb.zsbuf->height);
 256    }
 257
 258    setup->tiles_x = align(setup->fb.width, TILE_SIZE) / TILE_SIZE;
 259    setup->tiles_y = align(setup->fb.height, TILE_SIZE) / TILE_SIZE;
 260
 261    if (setup->fb.cbuf) {
 262       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 263          bin_everywhere( setup,
 264                          lp_rast_clear_color,
 265                          setup->clear.color );
 266       else
 267          bin_everywhere( setup, lp_rast_load_color, lp_rast_arg_null() );
 268    }
 269
 270    if (setup->fb.zsbuf) {
 271       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 272          bin_everywhere( setup,
 273                          lp_rast_clear_zstencil,
 274                          setup->clear.zstencil );
 275       else
 276          bin_everywhere( setup, lp_rast_load_zstencil, lp_rast_arg_null() );
 277    }
 278
 279    SETUP_DEBUG("%s done\n", __FUNCTION__);
 280 }
 281
 282
 283 /* This basically bins and then flushes any outstanding full-screen
 284  * clears.
 285  *
 286  * TODO: fast path for fullscreen clears and no triangles.
 287  */
 288 static void
 289 execute_clears( struct setup_context *setup )
 290 {
 291    SETUP_DEBUG("%s\n", __FUNCTION__);
 292
 293    begin_binning( setup );
 294    rasterize_bins( setup, TRUE );
 295 }
 296
 297
 298 static void
 299 set_state( struct setup_context *setup,
 300            unsigned new_state )
 301 {
 302    unsigned old_state = setup->state;
 303
 304    if (old_state == new_state)
 305       return;
 306
 307    SETUP_DEBUG("%s old %d new %d\n", __FUNCTION__, old_state, new_state);
 308
 309    switch (new_state) {
 310    case SETUP_ACTIVE:
 311       begin_binning( setup );
 312       break;
 313
 314    case SETUP_CLEARED:
 315       if (old_state == SETUP_ACTIVE) {
 316          assert(0);
 317          return;
 318       }
 319       break;
 320
 321    case SETUP_FLUSHED:
 322       if (old_state == SETUP_CLEARED)
 323          execute_clears( setup );
 324       else
 325          rasterize_bins( setup, TRUE );
 326       break;
 327    }
 328
 329    setup->state = new_state;
 330 }
 331
 332
 333 void
 334 lp_setup_flush( struct setup_context *setup,
 335                 unsigned flags )
 336 {
 337    SETUP_DEBUG("%s\n", __FUNCTION__);
 338
 339    set_state( setup, SETUP_FLUSHED );
 340 }
 341
 342
 343 void
 344 lp_setup_bind_framebuffer( struct setup_context *setup,
 345                            struct pipe_surface *color,
 346                            struct pipe_surface *zstencil )
 347 {
 348    SETUP_DEBUG("%s\n", __FUNCTION__);
 349
 350    set_state( setup, SETUP_FLUSHED );
 351
 352    pipe_surface_reference( &setup->fb.cbuf, color );
 353    pipe_surface_reference( &setup->fb.zsbuf, zstencil );
 354 }
 355
 356 void
 357 lp_setup_clear( struct setup_context *setup,
 358                 const float *color,
 359                 double depth,
 360                 unsigned stencil,
 361                 unsigned flags )
 362 {
 363    unsigned i;
 364
 365    SETUP_DEBUG("%s state %d\n", __FUNCTION__, setup->state);
 366
 367
 368    if (flags & PIPE_CLEAR_COLOR) {
 369       for (i = 0; i < 4; ++i)
 370          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 371    }
 372
 373    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 374       setup->clear.zstencil.clear_zstencil =
 375          util_pack_z_stencil(setup->fb.zsbuf->format,
 376                              depth,
 377                              stencil);
 378    }
 379
 380    if (setup->state == SETUP_ACTIVE) {
 381       /* Add the clear to existing bins.  In the unusual case where
 382        * both color and depth-stencilare being cleared, we could
 383        * discard the currently binned scene and start again, but I
 384        * don't see that as being a common usage.
 385        */
 386       if (flags & PIPE_CLEAR_COLOR)
 387          bin_everywhere( setup,
 388                          lp_rast_clear_color,
 389                          setup->clear.color );
 390
 391       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 392          bin_everywhere( setup,
 393                          lp_rast_clear_zstencil,
 394                          setup->clear.zstencil );
 395    }
 396    else {
 397       /* Put ourselves into the 'pre-clear' state, specifically to try
 398        * and accumulate multiple clears to color and depth_stencil
 399        * buffers which the app or state-tracker might issue
 400        * separately.
 401        */
 402       set_state( setup, SETUP_CLEARED );
 403
 404       setup->clear.flags |= flags;
 405    }
 406 }
 407
 408
 409
 410 void
 411 lp_setup_set_triangle_state( struct setup_context *setup,
 412                              unsigned cull_mode,
 413                              boolean ccw_is_frontface)
 414 {
 415    SETUP_DEBUG("%s\n", __FUNCTION__);
 416
 417    setup->ccw_is_frontface = ccw_is_frontface;
 418    setup->cullmode = cull_mode;
 419    setup->triangle = first_triangle;
 420 }
 421
 422
 423
 424 void
 425 lp_setup_set_fs_inputs( struct setup_context *setup,
 426                         const struct lp_shader_input *input,
 427                         unsigned nr )
 428 {
 429    SETUP_DEBUG("%s %p %u\n", __FUNCTION__, (void *) input, nr);
 430
 431    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 432    setup->fs.nr_inputs = nr;
 433 }
 434
 435 void
 436 lp_setup_set_fs( struct setup_context *setup,
 437                  struct lp_fragment_shader *fs )
 438 {
 439    SETUP_DEBUG("%s %p\n", __FUNCTION__, (void *) fs);
 440    /* FIXME: reference count */
 441
 442    setup->fs.current.jit_function = fs ? fs->current->jit_function : NULL;
 443    setup->dirty |= LP_SETUP_NEW_FS;
 444 }
 445
 446 void
 447 lp_setup_set_fs_constants(struct setup_context *setup,
 448                           struct pipe_buffer *buffer)
 449 {
 450    SETUP_DEBUG("%s %p\n", __FUNCTION__, (void *) buffer);
 451
 452    pipe_buffer_reference(&setup->constants.current, buffer);
 453
 454    setup->dirty |= LP_SETUP_NEW_CONSTANTS;
 455 }
 456
 457
 458 void
 459 lp_setup_set_alpha_ref_value( struct setup_context *setup,
 460                               float alpha_ref_value )
 461 {
 462    SETUP_DEBUG("%s %f\n", __FUNCTION__, alpha_ref_value);
 463
 464    if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
 465       setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
 466       setup->dirty |= LP_SETUP_NEW_FS;
 467    }
 468 }
 469
 470 void
 471 lp_setup_set_blend_color( struct setup_context *setup,
 472                           const struct pipe_blend_color *blend_color )
 473 {
 474    SETUP_DEBUG("%s\n", __FUNCTION__);
 475
 476    assert(blend_color);
 477
 478    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 479       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 480       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 481    }
 482 }
 483
 484 void
 485 lp_setup_set_sampler_textures( struct setup_context *setup,
 486                                unsigned num, struct pipe_texture **texture)
 487 {
 488    struct pipe_texture *dummy;
 489    unsigned i;
 490
 491    SETUP_DEBUG("%s\n", __FUNCTION__);
 492
 493
 494    assert(num <= PIPE_MAX_SAMPLERS);
 495
 496    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 497       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 498
 499       /* FIXME: hold on to the reference */
 500       dummy = NULL;
 501       pipe_texture_reference(&dummy, tex);
 502
 503       if(tex) {
 504          struct llvmpipe_texture *lp_tex = llvmpipe_texture(tex);
 505          struct lp_jit_texture *jit_tex;
 506          jit_tex = &setup->fs.current.jit_context.textures[i];
 507          jit_tex->width = tex->width[0];
 508          jit_tex->height = tex->height[0];
 509          jit_tex->stride = lp_tex->stride[0];
 510          if(!lp_tex->dt)
 511             jit_tex->data = lp_tex->data;
 512          else
 513             /* FIXME: map the rendertarget */
 514             assert(0);
 515       }
 516    }
 517
 518    setup->dirty |= LP_SETUP_NEW_FS;
 519 }
 520
 521 boolean
 522 lp_setup_is_texture_referenced( struct setup_context *setup,
 523                                 const struct pipe_texture *texture )
 524 {
 525    /* FIXME */
 526    return PIPE_UNREFERENCED;
 527 }
 528
 529
 530 static INLINE void
 531 lp_setup_update_shader_state( struct setup_context *setup )
 532 {
 533    SETUP_DEBUG("%s\n", __FUNCTION__);
 534
 535    assert(setup->fs.current.jit_function);
 536
 537    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 538       uint8_t *stored;
 539       unsigned i, j;
 540
 541       stored = get_data_aligned(&setup->data, 4 * 16, 16);
 542
 543       for (i = 0; i < 4; ++i) {
 544          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 545          for (j = 0; j < 16; ++j)
 546             stored[i*4 + j] = c;
 547       }
 548
 549       setup->blend_color.stored = stored;
 550
 551       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 552       setup->dirty |= LP_SETUP_NEW_FS;
 553    }
 554
 555
 556    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 557       struct pipe_buffer *buffer = setup->constants.current;
 558
 559       if(buffer) {
 560          unsigned current_size = buffer->size;
 561          const void *current_data = llvmpipe_buffer(buffer)->data;
 562
 563          /* TODO: copy only the actually used constants? */
 564
 565          if(setup->constants.stored_size != current_size ||
 566             !setup->constants.stored_data ||
 567             memcmp(setup->constants.stored_data,
 568                    current_data,
 569                    current_size) != 0) {
 570             void *stored;
 571
 572             stored = get_data(&setup->data, current_size);
 573             if(stored) {
 574                memcpy(stored,
 575                       current_data,
 576                       current_size);
 577                setup->constants.stored_size = current_size;
 578                setup->constants.stored_data = stored;
 579             }
 580          }
 581       }
 582       else {
 583          setup->constants.stored_size = 0;
 584          setup->constants.stored_data = NULL;
 585       }
 586
 587       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 588       setup->dirty |= LP_SETUP_NEW_FS;
 589    }
 590
 591
 592    if(setup->dirty & LP_SETUP_NEW_FS) {
 593       if(!setup->fs.stored ||
 594          memcmp(setup->fs.stored,
 595                 &setup->fs.current,
 596                 sizeof setup->fs.current) != 0) {
 597          struct lp_rast_state *stored;
 598
 599          stored = get_data(&setup->data, sizeof *stored);
 600          if(stored) {
 601             memcpy(stored,
 602                    &setup->fs.current,
 603                    sizeof setup->fs.current);
 604             setup->fs.stored = stored;
 605          }
 606       }
 607    }
 608
 609    setup->dirty = 0;
 610
 611    assert(setup->fs.stored);
 612 }
 613
 614
 615 /* Stubs for lines & points for now:
 616  */
 617 void
 618 lp_setup_point(struct setup_context *setup,
 619                      const float (*v0)[4])
 620 {
 621    lp_setup_update_shader_state(setup);
 622    setup->point( setup, v0 );
 623 }
 624
 625 void
 626 lp_setup_line(struct setup_context *setup,
 627                     const float (*v0)[4],
 628                     const float (*v1)[4])
 629 {
 630    lp_setup_update_shader_state(setup);
 631    setup->line( setup, v0, v1 );
 632 }
 633
 634 void
 635 lp_setup_tri(struct setup_context *setup,
 636              const float (*v0)[4],
 637              const float (*v1)[4],
 638              const float (*v2)[4])
 639 {
 640    SETUP_DEBUG("%s\n", __FUNCTION__);
 641
 642    lp_setup_update_shader_state(setup);
 643    setup->triangle( setup, v0, v1, v2 );
 644 }
 645
 646
 647 void
 648 lp_setup_destroy( struct setup_context *setup )
 649 {
 650    unsigned i, j;
 651
 652    reset_context( setup );
 653
 654    pipe_buffer_reference(&setup->constants.current, NULL);
 655
 656    for (i = 0; i < TILES_X; i++)
 657       for (j = 0; j < TILES_Y; j++)
 658          FREE(setup->tile[i][j].head);
 659
 660    FREE(setup->data.head);
 661
 662    lp_rast_destroy( setup->rast );
 663    FREE( setup );
 664 }
 665
 666
 667 /**
 668  * Create a new primitive tiling engine.  Currently also creates a
 669  * rasterizer to use with it.
 670  */
 671 struct setup_context *
 672 lp_setup_create( struct pipe_screen *screen )
 673 {
 674    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 675    unsigned i, j;
 676
 677    setup->rast = lp_rast_create( screen );
 678    if (!setup->rast)
 679       goto fail;
 680
 681    for (i = 0; i < TILES_X; i++)
 682       for (j = 0; j < TILES_Y; j++)
 683          setup->tile[i][j].head =
 684             setup->tile[i][j].tail = CALLOC_STRUCT(cmd_block);
 685
 686    setup->data.head =
 687       setup->data.tail = CALLOC_STRUCT(data_block);
 688
 689    setup->triangle = first_triangle;
 690    setup->line     = first_line;
 691    setup->point    = first_point;
 692
 693    setup->dirty = ~0;
 694
 695    return setup;
 696
 697 fail:
 698    FREE(setup);
 699    return NULL;
 700 }
 701