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 /** XXX temporary value, temporary here */
  54 #define MAX_SCENES 2
  55
  56
  57 static void set_scene_state( struct setup_context *, unsigned );
  58
  59
  60 struct lp_scene *
  61 lp_setup_get_current_scene(struct setup_context *setup)
  62 {
  63    if (!setup->scene) {
  64       /* wait for a free/empty bin */
  65       setup->scene = lp_scene_dequeue(setup->empty_scenes);
  66       if(0)lp_scene_reset( setup->scene ); /* XXX temporary? */
  67
  68       lp_scene_set_framebuffer_size(setup->scene,
  69                                     setup->fb.width,
  70                                     setup->fb.height);
  71    }
  72    return setup->scene;
  73 }
  74
  75
  76 static void
  77 first_triangle( struct setup_context *setup,
  78                 const float (*v0)[4],
  79                 const float (*v1)[4],
  80                 const float (*v2)[4])
  81 {
  82    set_scene_state( setup, SETUP_ACTIVE );
  83    lp_setup_choose_triangle( setup );
  84    setup->triangle( setup, v0, v1, v2 );
  85 }
  86
  87 static void
  88 first_line( struct setup_context *setup,
  89             const float (*v0)[4],
  90             const float (*v1)[4])
  91 {
  92    set_scene_state( setup, SETUP_ACTIVE );
  93    lp_setup_choose_line( setup );
  94    setup->line( setup, v0, v1 );
  95 }
  96
  97 static void
  98 first_point( struct setup_context *setup,
  99              const float (*v0)[4])
 100 {
 101    set_scene_state( setup, SETUP_ACTIVE );
 102    lp_setup_choose_point( setup );
 103    setup->point( setup, v0 );
 104 }
 105
 106 static void reset_context( struct setup_context *setup )
 107 {
 108    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 109
 110    /* Reset derived state */
 111    setup->constants.stored_size = 0;
 112    setup->constants.stored_data = NULL;
 113    setup->fs.stored = NULL;
 114    setup->dirty = ~0;
 115
 116    /* no current bin */
 117    setup->scene = NULL;
 118
 119    /* Reset some state:
 120     */
 121    setup->clear.flags = 0;
 122
 123    /* Have an explicit "start-binning" call and get rid of this
 124     * pointer twiddling?
 125     */
 126    setup->line = first_line;
 127    setup->point = first_point;
 128    setup->triangle = first_triangle;
 129 }
 130
 131
 132 /** Rasterize all scene's bins */
 133 static void
 134 lp_setup_rasterize_scene( struct setup_context *setup,
 135                          boolean write_depth )
 136 {
 137    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 138
 139    lp_rasterize_scene(setup->rast,
 140                       scene,
 141                       &setup->fb,
 142                       write_depth);
 143
 144    reset_context( setup );
 145
 146    LP_DBG(DEBUG_SETUP, "%s done \n", __FUNCTION__);
 147 }
 148
 149
 150
 151 static void
 152 begin_binning( struct setup_context *setup )
 153 {
 154    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 155
 156    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 157
 158    if (setup->fb.cbufs[0]) {
 159       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 160          lp_scene_bin_everywhere( scene,
 161                             lp_rast_clear_color,
 162                             setup->clear.color );
 163       else
 164          lp_scene_bin_everywhere( scene,
 165                             lp_rast_load_color,
 166                             lp_rast_arg_null() );
 167    }
 168
 169    if (setup->fb.zsbuf) {
 170       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 171          lp_scene_bin_everywhere( scene,
 172                             lp_rast_clear_zstencil,
 173                             setup->clear.zstencil );
 174       else
 175          lp_scene_bin_everywhere( scene,
 176                             lp_rast_load_zstencil,
 177                             lp_rast_arg_null() );
 178    }
 179
 180    LP_DBG(DEBUG_SETUP, "%s done\n", __FUNCTION__);
 181 }
 182
 183
 184 /* This basically bins and then flushes any outstanding full-screen
 185  * clears.
 186  *
 187  * TODO: fast path for fullscreen clears and no triangles.
 188  */
 189 static void
 190 execute_clears( struct setup_context *setup )
 191 {
 192    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 193
 194    begin_binning( setup );
 195    lp_setup_rasterize_scene( setup, TRUE );
 196 }
 197
 198
 199 static void
 200 set_scene_state( struct setup_context *setup,
 201            unsigned new_state )
 202 {
 203    unsigned old_state = setup->state;
 204
 205    if (old_state == new_state)
 206       return;
 207
 208    LP_DBG(DEBUG_SETUP, "%s old %d new %d\n", __FUNCTION__, old_state, new_state);
 209
 210    switch (new_state) {
 211    case SETUP_ACTIVE:
 212       begin_binning( setup );
 213       break;
 214
 215    case SETUP_CLEARED:
 216       if (old_state == SETUP_ACTIVE) {
 217          assert(0);
 218          return;
 219       }
 220       break;
 221
 222    case SETUP_FLUSHED:
 223       if (old_state == SETUP_CLEARED)
 224          execute_clears( setup );
 225       else
 226          lp_setup_rasterize_scene( setup, TRUE );
 227       break;
 228    }
 229
 230    setup->state = new_state;
 231 }
 232
 233
 234 void
 235 lp_setup_flush( struct setup_context *setup,
 236                 unsigned flags )
 237 {
 238    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 239
 240    set_scene_state( setup, SETUP_FLUSHED );
 241 }
 242
 243
 244 void
 245 lp_setup_bind_framebuffer( struct setup_context *setup,
 246                            const struct pipe_framebuffer_state *fb )
 247 {
 248    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 249
 250    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 251
 252    set_scene_state( setup, SETUP_FLUSHED );
 253
 254    util_copy_framebuffer_state(&setup->fb, fb);
 255
 256    lp_scene_set_framebuffer_size(scene, setup->fb.width, setup->fb.height);
 257 }
 258
 259
 260 void
 261 lp_setup_clear( struct setup_context *setup,
 262                 const float *color,
 263                 double depth,
 264                 unsigned stencil,
 265                 unsigned flags )
 266 {
 267    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 268    unsigned i;
 269
 270    LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
 271
 272
 273    if (flags & PIPE_CLEAR_COLOR) {
 274       for (i = 0; i < 4; ++i)
 275          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 276    }
 277
 278    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 279       setup->clear.zstencil.clear_zstencil =
 280          util_pack_z_stencil(setup->fb.zsbuf->format,
 281                              depth,
 282                              stencil);
 283    }
 284
 285    if (setup->state == SETUP_ACTIVE) {
 286       /* Add the clear to existing scene.  In the unusual case where
 287        * both color and depth-stencil are being cleared when there's
 288        * already been some rendering, we could discard the currently
 289        * binned scene and start again, but I don't see that as being
 290        * a common usage.
 291        */
 292       if (flags & PIPE_CLEAR_COLOR)
 293          lp_scene_bin_everywhere( scene,
 294                             lp_rast_clear_color,
 295                             setup->clear.color );
 296
 297       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 298          lp_scene_bin_everywhere( scene,
 299                             lp_rast_clear_zstencil,
 300                             setup->clear.zstencil );
 301    }
 302    else {
 303       /* Put ourselves into the 'pre-clear' state, specifically to try
 304        * and accumulate multiple clears to color and depth_stencil
 305        * buffers which the app or state-tracker might issue
 306        * separately.
 307        */
 308       set_scene_state( setup, SETUP_CLEARED );
 309
 310       setup->clear.flags |= flags;
 311    }
 312 }
 313
 314
 315 /**
 316  * Emit a fence.
 317  */
 318 struct pipe_fence_handle *
 319 lp_setup_fence( struct setup_context *setup )
 320 {
 321    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 322    const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
 323    struct lp_fence *fence = lp_fence_create(rank);
 324
 325    LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
 326
 327    set_scene_state( setup, SETUP_ACTIVE );
 328
 329    /* insert the fence into all command bins */
 330    lp_scene_bin_everywhere( scene,
 331                             lp_rast_fence,
 332                             lp_rast_arg_fence(fence) );
 333
 334    return (struct pipe_fence_handle *) fence;
 335 }
 336
 337
 338 void
 339 lp_setup_set_triangle_state( struct setup_context *setup,
 340                              unsigned cull_mode,
 341                              boolean ccw_is_frontface)
 342 {
 343    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 344
 345    setup->ccw_is_frontface = ccw_is_frontface;
 346    setup->cullmode = cull_mode;
 347    setup->triangle = first_triangle;
 348 }
 349
 350
 351
 352 void
 353 lp_setup_set_fs_inputs( struct setup_context *setup,
 354                         const struct lp_shader_input *input,
 355                         unsigned nr )
 356 {
 357    LP_DBG(DEBUG_SETUP, "%s %p %u\n", __FUNCTION__, (void *) input, nr);
 358
 359    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 360    setup->fs.nr_inputs = nr;
 361 }
 362
 363 void
 364 lp_setup_set_fs_function( struct setup_context *setup,
 365                           lp_jit_frag_func jit_function )
 366 {
 367    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function);
 368    /* FIXME: reference count */
 369
 370    setup->fs.current.jit_function = jit_function;
 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 void
 432 lp_setup_set_sampler_textures( struct setup_context *setup,
 433                                unsigned num, struct pipe_texture **texture)
 434 {
 435    struct pipe_texture *dummy;
 436    unsigned i;
 437
 438    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 439
 440
 441    assert(num <= PIPE_MAX_SAMPLERS);
 442
 443    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 444       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 445
 446       /* FIXME: hold on to the reference */
 447       dummy = NULL;
 448       pipe_texture_reference(&dummy, tex);
 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->width[0];
 455          jit_tex->height = tex->height[0];
 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    }
 464
 465    setup->dirty |= LP_SETUP_NEW_FS;
 466 }
 467
 468 boolean
 469 lp_setup_is_texture_referenced( struct setup_context *setup,
 470                                 const struct pipe_texture *texture )
 471 {
 472    /* FIXME */
 473    return PIPE_UNREFERENCED;
 474 }
 475
 476
 477 void
 478 lp_setup_update_state( struct setup_context *setup )
 479 {
 480    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 481
 482    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 483
 484    assert(setup->fs.current.jit_function);
 485
 486    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 487       uint8_t *stored;
 488       unsigned i, j;
 489
 490       stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
 491
 492       /* smear each blend color component across 16 ubyte elements */
 493       for (i = 0; i < 4; ++i) {
 494          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 495          for (j = 0; j < 16; ++j)
 496             stored[i*16 + j] = c;
 497       }
 498
 499       setup->blend_color.stored = stored;
 500
 501       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 502       setup->dirty |= LP_SETUP_NEW_FS;
 503    }
 504
 505
 506    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 507       struct pipe_buffer *buffer = setup->constants.current;
 508
 509       if(buffer) {
 510          unsigned current_size = buffer->size;
 511          const void *current_data = llvmpipe_buffer(buffer)->data;
 512
 513          /* TODO: copy only the actually used constants? */
 514
 515          if(setup->constants.stored_size != current_size ||
 516             !setup->constants.stored_data ||
 517             memcmp(setup->constants.stored_data,
 518                    current_data,
 519                    current_size) != 0) {
 520             void *stored;
 521
 522             stored = lp_scene_alloc(scene, current_size);
 523             if(stored) {
 524                memcpy(stored,
 525                       current_data,
 526                       current_size);
 527                setup->constants.stored_size = current_size;
 528                setup->constants.stored_data = stored;
 529             }
 530          }
 531       }
 532       else {
 533          setup->constants.stored_size = 0;
 534          setup->constants.stored_data = NULL;
 535       }
 536
 537       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 538       setup->dirty |= LP_SETUP_NEW_FS;
 539    }
 540
 541
 542    if(setup->dirty & LP_SETUP_NEW_FS) {
 543       if(!setup->fs.stored ||
 544          memcmp(setup->fs.stored,
 545                 &setup->fs.current,
 546                 sizeof setup->fs.current) != 0) {
 547          /* The fs state that's been stored in the scene is different from
 548           * the new, current state.  So allocate a new lp_rast_state object
 549           * and append it to the bin's setup data buffer.
 550           */
 551          struct lp_rast_state *stored =
 552             (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
 553          if(stored) {
 554             memcpy(stored,
 555                    &setup->fs.current,
 556                    sizeof setup->fs.current);
 557             setup->fs.stored = stored;
 558
 559             /* put the state-set command into all bins */
 560             lp_scene_bin_state_command( scene,
 561                                         lp_rast_set_state,
 562                                         lp_rast_arg_state(setup->fs.stored) );
 563          }
 564       }
 565    }
 566
 567    setup->dirty = 0;
 568
 569    assert(setup->fs.stored);
 570 }
 571
 572
 573
 574
 575 void
 576 lp_setup_destroy( struct setup_context *setup )
 577 {
 578    reset_context( setup );
 579
 580    pipe_buffer_reference(&setup->constants.current, NULL);
 581
 582    /* free the scenes in the 'empty' queue */
 583    while (lp_scene_queue_count(setup->empty_scenes) > 0) {
 584       struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes);
 585       if (!scene)
 586          break;
 587       lp_scene_destroy(scene);
 588    }
 589
 590    lp_rast_destroy( setup->rast );
 591
 592    FREE( setup );
 593 }
 594
 595
 596 /**
 597  * Create a new primitive tiling engine.  Plug it into the backend of
 598  * the draw module.  Currently also creates a rasterizer to use with
 599  * it.
 600  */
 601 struct setup_context *
 602 lp_setup_create( struct pipe_screen *screen,
 603                  struct draw_context *draw )
 604 {
 605    unsigned i;
 606    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 607
 608    if (!setup)
 609       return NULL;
 610
 611    lp_setup_init_vbuf(setup);
 612
 613    setup->empty_scenes = lp_scene_queue_create();
 614    if (!setup->empty_scenes)
 615       goto fail;
 616
 617    setup->rast = lp_rast_create( screen, setup->empty_scenes );
 618    if (!setup->rast)
 619       goto fail;
 620
 621    setup->vbuf = draw_vbuf_stage(draw, &setup->base);
 622    if (!setup->vbuf)
 623       goto fail;
 624
 625    draw_set_rasterize_stage(draw, setup->vbuf);
 626    draw_set_render(draw, &setup->base);
 627
 628    /* create some empty scenes */
 629    for (i = 0; i < MAX_SCENES; i++) {
 630       struct lp_scene *scene = lp_scene_create();
 631       lp_scene_enqueue(setup->empty_scenes, scene);
 632    }
 633
 634    setup->triangle = first_triangle;
 635    setup->line     = first_line;
 636    setup->point    = first_point;
 637
 638    setup->dirty = ~0;
 639
 640    return setup;
 641
 642 fail:
 643    if (setup->rast)
 644       lp_rast_destroy( setup->rast );
 645
 646    if (setup->vbuf)
 647       ;
 648
 649    if (setup->empty_scenes)
 650       lp_scene_queue_destroy(setup->empty_scenes);
 651
 652    FREE(setup);
 653    return NULL;
 654 }
 655