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