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    util_copy_framebuffer_state(&setup->fb, fb);
 253
 254    lp_scene_set_framebuffer_size(scene, setup->fb.width, setup->fb.height);
 255 }
 256
 257
 258 void
 259 lp_setup_clear( struct setup_context *setup,
 260                 const float *color,
 261                 double depth,
 262                 unsigned stencil,
 263                 unsigned flags )
 264 {
 265    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 266    unsigned i;
 267
 268    LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
 269
 270
 271    if (flags & PIPE_CLEAR_COLOR) {
 272       for (i = 0; i < 4; ++i)
 273          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 274    }
 275
 276    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 277       setup->clear.zstencil.clear_zstencil =
 278          util_pack_z_stencil(setup->fb.zsbuf->format,
 279                              depth,
 280                              stencil);
 281    }
 282
 283    if (setup->state == SETUP_ACTIVE) {
 284       /* Add the clear to existing scene.  In the unusual case where
 285        * both color and depth-stencil are being cleared when there's
 286        * already been some rendering, we could discard the currently
 287        * binned scene and start again, but I don't see that as being
 288        * a common usage.
 289        */
 290       if (flags & PIPE_CLEAR_COLOR)
 291          lp_scene_bin_everywhere( scene,
 292                             lp_rast_clear_color,
 293                             setup->clear.color );
 294
 295       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 296          lp_scene_bin_everywhere( scene,
 297                             lp_rast_clear_zstencil,
 298                             setup->clear.zstencil );
 299    }
 300    else {
 301       /* Put ourselves into the 'pre-clear' state, specifically to try
 302        * and accumulate multiple clears to color and depth_stencil
 303        * buffers which the app or state-tracker might issue
 304        * separately.
 305        */
 306       set_scene_state( setup, SETUP_CLEARED );
 307
 308       setup->clear.flags |= flags;
 309    }
 310 }
 311
 312
 313 /**
 314  * Emit a fence.
 315  */
 316 struct pipe_fence_handle *
 317 lp_setup_fence( struct setup_context *setup )
 318 {
 319    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 320    const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
 321    struct lp_fence *fence = lp_fence_create(rank);
 322
 323    LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
 324
 325    set_scene_state( setup, SETUP_ACTIVE );
 326
 327    /* insert the fence into all command bins */
 328    lp_scene_bin_everywhere( scene,
 329                             lp_rast_fence,
 330                             lp_rast_arg_fence(fence) );
 331
 332    return (struct pipe_fence_handle *) fence;
 333 }
 334
 335
 336 void
 337 lp_setup_set_triangle_state( struct setup_context *setup,
 338                              unsigned cull_mode,
 339                              boolean ccw_is_frontface)
 340 {
 341    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 342
 343    setup->ccw_is_frontface = ccw_is_frontface;
 344    setup->cullmode = cull_mode;
 345    setup->triangle = first_triangle;
 346 }
 347
 348
 349
 350 void
 351 lp_setup_set_fs_inputs( struct setup_context *setup,
 352                         const struct lp_shader_input *input,
 353                         unsigned nr )
 354 {
 355    LP_DBG(DEBUG_SETUP, "%s %p %u\n", __FUNCTION__, (void *) input, nr);
 356
 357    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 358    setup->fs.nr_inputs = nr;
 359 }
 360
 361 void
 362 lp_setup_set_fs_function( struct setup_context *setup,
 363                           lp_jit_frag_func jit_function,
 364                           boolean opaque )
 365 {
 366    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function);
 367    /* FIXME: reference count */
 368
 369    setup->fs.current.jit_function = jit_function;
 370    setup->fs.current.opaque = opaque;
 371    setup->dirty |= LP_SETUP_NEW_FS;
 372 }
 373
 374 void
 375 lp_setup_set_fs_constants(struct setup_context *setup,
 376                           struct pipe_buffer *buffer)
 377 {
 378    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) buffer);
 379
 380    pipe_buffer_reference(&setup->constants.current, buffer);
 381
 382    setup->dirty |= LP_SETUP_NEW_CONSTANTS;
 383 }
 384
 385
 386 void
 387 lp_setup_set_alpha_ref_value( struct setup_context *setup,
 388                               float alpha_ref_value )
 389 {
 390    LP_DBG(DEBUG_SETUP, "%s %f\n", __FUNCTION__, alpha_ref_value);
 391
 392    if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
 393       setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
 394       setup->dirty |= LP_SETUP_NEW_FS;
 395    }
 396 }
 397
 398 void
 399 lp_setup_set_blend_color( struct setup_context *setup,
 400                           const struct pipe_blend_color *blend_color )
 401 {
 402    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 403
 404    assert(blend_color);
 405
 406    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 407       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 408       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 409    }
 410 }
 411
 412
 413 void
 414 lp_setup_set_flatshade_first( struct setup_context *setup,
 415                               boolean flatshade_first )
 416 {
 417    setup->flatshade_first = flatshade_first;
 418 }
 419
 420
 421 void
 422 lp_setup_set_vertex_info( struct setup_context *setup,
 423                           struct vertex_info *vertex_info )
 424 {
 425    /* XXX: just silently holding onto the pointer:
 426     */
 427    setup->vertex_info = vertex_info;
 428 }
 429
 430
 431 /**
 432  * Called during state validation when LP_NEW_TEXTURE is set.
 433  */
 434 void
 435 lp_setup_set_sampler_textures( struct setup_context *setup,
 436                                unsigned num, struct pipe_texture **texture)
 437 {
 438    unsigned i;
 439
 440    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 441
 442    assert(num <= PIPE_MAX_SAMPLERS);
 443
 444    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 445       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 446
 447       if(tex) {
 448          struct llvmpipe_texture *lp_tex = llvmpipe_texture(tex);
 449          struct lp_jit_texture *jit_tex;
 450          jit_tex = &setup->fs.current.jit_context.textures[i];
 451          jit_tex->width = tex->width0;
 452          jit_tex->height = tex->height0;
 453          jit_tex->stride = lp_tex->stride[0];
 454          if(!lp_tex->dt)
 455             jit_tex->data = lp_tex->data;
 456          else
 457             /* FIXME: map the rendertarget */
 458             assert(0);
 459
 460          /* the scene references this texture */
 461          {
 462             struct lp_scene *scene = lp_setup_get_current_scene(setup);
 463             lp_scene_texture_reference(scene, tex);
 464          }
 465       }
 466    }
 467
 468    setup->dirty |= LP_SETUP_NEW_FS;
 469 }
 470
 471
 472 /**
 473  * Is the given texture referenced by any scene?
 474  * Note: we have to check all scenes including any scenes currently
 475  * being rendered and the current scene being built.
 476  */
 477 boolean
 478 lp_setup_is_texture_referenced( const struct setup_context *setup,
 479                                 const struct pipe_texture *texture )
 480 {
 481    unsigned i;
 482    for (i = 0; i < Elements(setup->scenes); i++) {
 483       if (lp_scene_is_textured_referenced(setup->scenes[i], texture)) {
 484          return PIPE_REFERENCED_FOR_READ;
 485       }
 486    }
 487    return PIPE_UNREFERENCED;
 488 }
 489
 490
 491 /**
 492  * Called by vbuf code when we're about to draw something.
 493  */
 494 void
 495 lp_setup_update_state( struct setup_context *setup )
 496 {
 497    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 498
 499    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 500
 501    assert(setup->fs.current.jit_function);
 502
 503    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 504       uint8_t *stored;
 505       unsigned i, j;
 506
 507       stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
 508
 509       /* smear each blend color component across 16 ubyte elements */
 510       for (i = 0; i < 4; ++i) {
 511          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 512          for (j = 0; j < 16; ++j)
 513             stored[i*16 + j] = c;
 514       }
 515
 516       setup->blend_color.stored = stored;
 517
 518       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 519       setup->dirty |= LP_SETUP_NEW_FS;
 520    }
 521
 522
 523    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 524       struct pipe_buffer *buffer = setup->constants.current;
 525
 526       if(buffer) {
 527          unsigned current_size = buffer->size;
 528          const void *current_data = llvmpipe_buffer(buffer)->data;
 529
 530          /* TODO: copy only the actually used constants? */
 531
 532          if(setup->constants.stored_size != current_size ||
 533             !setup->constants.stored_data ||
 534             memcmp(setup->constants.stored_data,
 535                    current_data,
 536                    current_size) != 0) {
 537             void *stored;
 538
 539             stored = lp_scene_alloc(scene, current_size);
 540             if(stored) {
 541                memcpy(stored,
 542                       current_data,
 543                       current_size);
 544                setup->constants.stored_size = current_size;
 545                setup->constants.stored_data = stored;
 546             }
 547          }
 548       }
 549       else {
 550          setup->constants.stored_size = 0;
 551          setup->constants.stored_data = NULL;
 552       }
 553
 554       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 555       setup->dirty |= LP_SETUP_NEW_FS;
 556    }
 557
 558
 559    if(setup->dirty & LP_SETUP_NEW_FS) {
 560       if(!setup->fs.stored ||
 561          memcmp(setup->fs.stored,
 562                 &setup->fs.current,
 563                 sizeof setup->fs.current) != 0) {
 564          /* The fs state that's been stored in the scene is different from
 565           * the new, current state.  So allocate a new lp_rast_state object
 566           * and append it to the bin's setup data buffer.
 567           */
 568          struct lp_rast_state *stored =
 569             (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
 570          if(stored) {
 571             memcpy(stored,
 572                    &setup->fs.current,
 573                    sizeof setup->fs.current);
 574             setup->fs.stored = stored;
 575
 576             /* put the state-set command into all bins */
 577             lp_scene_bin_state_command( scene,
 578                                         lp_rast_set_state,
 579                                         lp_rast_arg_state(setup->fs.stored) );
 580          }
 581       }
 582    }
 583
 584    setup->dirty = 0;
 585
 586    assert(setup->fs.stored);
 587 }
 588
 589
 590
 591 /* Only caller is lp_setup_vbuf_destroy()
 592  */
 593 void
 594 lp_setup_destroy( struct setup_context *setup )
 595 {
 596    reset_context( setup );
 597
 598    pipe_buffer_reference(&setup->constants.current, NULL);
 599
 600    /* free the scenes in the 'empty' queue */
 601    while (lp_scene_queue_count(setup->empty_scenes) > 0) {
 602       struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes);
 603       if (!scene)
 604          break;
 605       lp_scene_destroy(scene);
 606    }
 607
 608    lp_rast_destroy( setup->rast );
 609
 610    FREE( setup );
 611 }
 612
 613
 614 /**
 615  * Create a new primitive tiling engine.  Plug it into the backend of
 616  * the draw module.  Currently also creates a rasterizer to use with
 617  * it.
 618  */
 619 struct setup_context *
 620 lp_setup_create( struct pipe_screen *screen,
 621                  struct draw_context *draw )
 622 {
 623    unsigned i;
 624    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 625
 626    if (!setup)
 627       return NULL;
 628
 629    lp_setup_init_vbuf(setup);
 630
 631    setup->empty_scenes = lp_scene_queue_create();
 632    if (!setup->empty_scenes)
 633       goto fail;
 634
 635    setup->rast = lp_rast_create( screen, setup->empty_scenes );
 636    if (!setup->rast)
 637       goto fail;
 638
 639    setup->vbuf = draw_vbuf_stage(draw, &setup->base);
 640    if (!setup->vbuf)
 641       goto fail;
 642
 643    draw_set_rasterize_stage(draw, setup->vbuf);
 644    draw_set_render(draw, &setup->base);
 645
 646    /* create some empty scenes */
 647    for (i = 0; i < MAX_SCENES; i++) {
 648       setup->scenes[i] = lp_scene_create();
 649       lp_scene_enqueue(setup->empty_scenes, setup->scenes[i]);
 650    }
 651
 652    setup->triangle = first_triangle;
 653    setup->line     = first_line;
 654    setup->point    = first_point;
 655
 656    setup->dirty = ~0;
 657
 658    return setup;
 659
 660 fail:
 661    if (setup->rast)
 662       lp_rast_destroy( setup->rast );
 663
 664    if (setup->vbuf)
 665       ;
 666
 667    if (setup->empty_scenes)
 668       lp_scene_queue_destroy(setup->empty_scenes);
 669
 670    FREE(setup);
 671    return NULL;
 672 }
 673