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 color: %s depth: %s\n", __FUNCTION__,
 157           (setup->clear.flags & PIPE_CLEAR_COLOR) ? "clear": "load",
 158           (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL) ? "clear": "load");
 159
 160    if (setup->fb.nr_cbufs) {
 161       if (setup->clear.flags & PIPE_CLEAR_COLOR)
 162          lp_scene_bin_everywhere( scene,
 163                                   lp_rast_clear_color,
 164                                   setup->clear.color );
 165       else
 166          lp_scene_bin_everywhere( scene,
 167                                   lp_rast_load_color,
 168                                   lp_rast_arg_null() );
 169    }
 170
 171    if (setup->fb.zsbuf) {
 172       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 173          lp_scene_bin_everywhere( scene,
 174                                   lp_rast_clear_zstencil,
 175                                   setup->clear.zstencil );
 176       else
 177          lp_scene_bin_everywhere( scene,
 178                                   lp_rast_load_zstencil,
 179                                   lp_rast_arg_null() );
 180    }
 181
 182    LP_DBG(DEBUG_SETUP, "%s done\n", __FUNCTION__);
 183 }
 184
 185
 186 /* This basically bins and then flushes any outstanding full-screen
 187  * clears.
 188  *
 189  * TODO: fast path for fullscreen clears and no triangles.
 190  */
 191 static void
 192 execute_clears( struct setup_context *setup )
 193 {
 194    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 195
 196    begin_binning( setup );
 197    lp_setup_rasterize_scene( setup, TRUE );
 198 }
 199
 200
 201 static void
 202 set_scene_state( struct setup_context *setup,
 203            unsigned new_state )
 204 {
 205    unsigned old_state = setup->state;
 206
 207    if (old_state == new_state)
 208       return;
 209
 210    LP_DBG(DEBUG_SETUP, "%s old %d new %d\n", __FUNCTION__, old_state, new_state);
 211
 212    switch (new_state) {
 213    case SETUP_ACTIVE:
 214       begin_binning( setup );
 215       break;
 216
 217    case SETUP_CLEARED:
 218       if (old_state == SETUP_ACTIVE) {
 219          assert(0);
 220          return;
 221       }
 222       break;
 223
 224    case SETUP_FLUSHED:
 225       if (old_state == SETUP_CLEARED)
 226          execute_clears( setup );
 227       else
 228          lp_setup_rasterize_scene( setup, TRUE );
 229       break;
 230    }
 231
 232    setup->state = new_state;
 233 }
 234
 235
 236 void
 237 lp_setup_flush( struct setup_context *setup,
 238                 unsigned flags )
 239 {
 240    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 241
 242    set_scene_state( setup, SETUP_FLUSHED );
 243 }
 244
 245
 246 void
 247 lp_setup_bind_framebuffer( struct setup_context *setup,
 248                            const struct pipe_framebuffer_state *fb )
 249 {
 250    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 251
 252    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 253
 254    set_scene_state( setup, SETUP_FLUSHED );
 255
 256    util_copy_framebuffer_state(&setup->fb, fb);
 257
 258    lp_scene_set_framebuffer_size(scene, setup->fb.width, setup->fb.height);
 259 }
 260
 261
 262 void
 263 lp_setup_clear( struct setup_context *setup,
 264                 const float *color,
 265                 double depth,
 266                 unsigned stencil,
 267                 unsigned flags )
 268 {
 269    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 270    unsigned i;
 271
 272    LP_DBG(DEBUG_SETUP, "%s state %d\n", __FUNCTION__, setup->state);
 273
 274
 275    if (flags & PIPE_CLEAR_COLOR) {
 276       for (i = 0; i < 4; ++i)
 277          setup->clear.color.clear_color[i] = float_to_ubyte(color[i]);
 278    }
 279
 280    if (flags & PIPE_CLEAR_DEPTHSTENCIL) {
 281       setup->clear.zstencil.clear_zstencil =
 282          util_pack_z_stencil(setup->fb.zsbuf->format,
 283                              depth,
 284                              stencil);
 285    }
 286
 287    if (setup->state == SETUP_ACTIVE) {
 288       /* Add the clear to existing scene.  In the unusual case where
 289        * both color and depth-stencil are being cleared when there's
 290        * already been some rendering, we could discard the currently
 291        * binned scene and start again, but I don't see that as being
 292        * a common usage.
 293        */
 294       if (flags & PIPE_CLEAR_COLOR)
 295          lp_scene_bin_everywhere( scene,
 296                             lp_rast_clear_color,
 297                             setup->clear.color );
 298
 299       if (setup->clear.flags & PIPE_CLEAR_DEPTHSTENCIL)
 300          lp_scene_bin_everywhere( scene,
 301                             lp_rast_clear_zstencil,
 302                             setup->clear.zstencil );
 303    }
 304    else {
 305       /* Put ourselves into the 'pre-clear' state, specifically to try
 306        * and accumulate multiple clears to color and depth_stencil
 307        * buffers which the app or state-tracker might issue
 308        * separately.
 309        */
 310       set_scene_state( setup, SETUP_CLEARED );
 311
 312       setup->clear.flags |= flags;
 313    }
 314 }
 315
 316
 317 /**
 318  * Emit a fence.
 319  */
 320 struct pipe_fence_handle *
 321 lp_setup_fence( struct setup_context *setup )
 322 {
 323    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 324    const unsigned rank = lp_scene_get_num_bins( scene ); /* xxx */
 325    struct lp_fence *fence = lp_fence_create(rank);
 326
 327    LP_DBG(DEBUG_SETUP, "%s rank %u\n", __FUNCTION__, rank);
 328
 329    set_scene_state( setup, SETUP_ACTIVE );
 330
 331    /* insert the fence into all command bins */
 332    lp_scene_bin_everywhere( scene,
 333                             lp_rast_fence,
 334                             lp_rast_arg_fence(fence) );
 335
 336    return (struct pipe_fence_handle *) fence;
 337 }
 338
 339
 340 void
 341 lp_setup_set_triangle_state( struct setup_context *setup,
 342                              unsigned cull_mode,
 343                              boolean ccw_is_frontface)
 344 {
 345    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 346
 347    setup->ccw_is_frontface = ccw_is_frontface;
 348    setup->cullmode = cull_mode;
 349    setup->triangle = first_triangle;
 350 }
 351
 352
 353
 354 void
 355 lp_setup_set_fs_inputs( struct setup_context *setup,
 356                         const struct lp_shader_input *input,
 357                         unsigned nr )
 358 {
 359    LP_DBG(DEBUG_SETUP, "%s %p %u\n", __FUNCTION__, (void *) input, nr);
 360
 361    memcpy( setup->fs.input, input, nr * sizeof input[0] );
 362    setup->fs.nr_inputs = nr;
 363 }
 364
 365 void
 366 lp_setup_set_fs_function( struct setup_context *setup,
 367                           lp_jit_frag_func jit_function,
 368                           boolean opaque )
 369 {
 370    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) jit_function);
 371    /* FIXME: reference count */
 372
 373    setup->fs.current.jit_function = jit_function;
 374    setup->fs.current.opaque = opaque;
 375    setup->dirty |= LP_SETUP_NEW_FS;
 376 }
 377
 378 void
 379 lp_setup_set_fs_constants(struct setup_context *setup,
 380                           struct pipe_buffer *buffer)
 381 {
 382    LP_DBG(DEBUG_SETUP, "%s %p\n", __FUNCTION__, (void *) buffer);
 383
 384    pipe_buffer_reference(&setup->constants.current, buffer);
 385
 386    setup->dirty |= LP_SETUP_NEW_CONSTANTS;
 387 }
 388
 389
 390 void
 391 lp_setup_set_alpha_ref_value( struct setup_context *setup,
 392                               float alpha_ref_value )
 393 {
 394    LP_DBG(DEBUG_SETUP, "%s %f\n", __FUNCTION__, alpha_ref_value);
 395
 396    if(setup->fs.current.jit_context.alpha_ref_value != alpha_ref_value) {
 397       setup->fs.current.jit_context.alpha_ref_value = alpha_ref_value;
 398       setup->dirty |= LP_SETUP_NEW_FS;
 399    }
 400 }
 401
 402 void
 403 lp_setup_set_blend_color( struct setup_context *setup,
 404                           const struct pipe_blend_color *blend_color )
 405 {
 406    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 407
 408    assert(blend_color);
 409
 410    if(memcmp(&setup->blend_color.current, blend_color, sizeof *blend_color) != 0) {
 411       memcpy(&setup->blend_color.current, blend_color, sizeof *blend_color);
 412       setup->dirty |= LP_SETUP_NEW_BLEND_COLOR;
 413    }
 414 }
 415
 416
 417 void
 418 lp_setup_set_flatshade_first( struct setup_context *setup,
 419                               boolean flatshade_first )
 420 {
 421    setup->flatshade_first = flatshade_first;
 422 }
 423
 424
 425 void
 426 lp_setup_set_vertex_info( struct setup_context *setup,
 427                           struct vertex_info *vertex_info )
 428 {
 429    /* XXX: just silently holding onto the pointer:
 430     */
 431    setup->vertex_info = vertex_info;
 432 }
 433
 434
 435 void
 436 lp_setup_set_sampler_textures( struct setup_context *setup,
 437                                unsigned num, struct pipe_texture **texture)
 438 {
 439    struct pipe_texture *dummy;
 440    unsigned i;
 441
 442    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 443
 444
 445    assert(num <= PIPE_MAX_SAMPLERS);
 446
 447    for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
 448       struct pipe_texture *tex = i < num ? texture[i] : NULL;
 449
 450       /* FIXME: hold on to the reference */
 451       dummy = NULL;
 452       pipe_texture_reference(&dummy, tex);
 453
 454       if(tex) {
 455          struct llvmpipe_texture *lp_tex = llvmpipe_texture(tex);
 456          struct lp_jit_texture *jit_tex;
 457          jit_tex = &setup->fs.current.jit_context.textures[i];
 458          jit_tex->width = tex->width0;
 459          jit_tex->height = tex->height0;
 460          jit_tex->stride = lp_tex->stride[0];
 461          if(!lp_tex->dt)
 462             jit_tex->data = lp_tex->data;
 463          else
 464             /* FIXME: map the rendertarget */
 465             assert(0);
 466       }
 467    }
 468
 469    setup->dirty |= LP_SETUP_NEW_FS;
 470 }
 471
 472 boolean
 473 lp_setup_is_texture_referenced( struct setup_context *setup,
 474                                 const struct pipe_texture *texture )
 475 {
 476    /* FIXME */
 477    return PIPE_UNREFERENCED;
 478 }
 479
 480
 481 void
 482 lp_setup_update_state( struct setup_context *setup )
 483 {
 484    struct lp_scene *scene = lp_setup_get_current_scene(setup);
 485
 486    LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
 487
 488    assert(setup->fs.current.jit_function);
 489
 490    if(setup->dirty & LP_SETUP_NEW_BLEND_COLOR) {
 491       uint8_t *stored;
 492       unsigned i, j;
 493
 494       stored = lp_scene_alloc_aligned(scene, 4 * 16, 16);
 495
 496       /* smear each blend color component across 16 ubyte elements */
 497       for (i = 0; i < 4; ++i) {
 498          uint8_t c = float_to_ubyte(setup->blend_color.current.color[i]);
 499          for (j = 0; j < 16; ++j)
 500             stored[i*16 + j] = c;
 501       }
 502
 503       setup->blend_color.stored = stored;
 504
 505       setup->fs.current.jit_context.blend_color = setup->blend_color.stored;
 506       setup->dirty |= LP_SETUP_NEW_FS;
 507    }
 508
 509
 510    if(setup->dirty & LP_SETUP_NEW_CONSTANTS) {
 511       struct pipe_buffer *buffer = setup->constants.current;
 512
 513       if(buffer) {
 514          unsigned current_size = buffer->size;
 515          const void *current_data = llvmpipe_buffer(buffer)->data;
 516
 517          /* TODO: copy only the actually used constants? */
 518
 519          if(setup->constants.stored_size != current_size ||
 520             !setup->constants.stored_data ||
 521             memcmp(setup->constants.stored_data,
 522                    current_data,
 523                    current_size) != 0) {
 524             void *stored;
 525
 526             stored = lp_scene_alloc(scene, current_size);
 527             if(stored) {
 528                memcpy(stored,
 529                       current_data,
 530                       current_size);
 531                setup->constants.stored_size = current_size;
 532                setup->constants.stored_data = stored;
 533             }
 534          }
 535       }
 536       else {
 537          setup->constants.stored_size = 0;
 538          setup->constants.stored_data = NULL;
 539       }
 540
 541       setup->fs.current.jit_context.constants = setup->constants.stored_data;
 542       setup->dirty |= LP_SETUP_NEW_FS;
 543    }
 544
 545
 546    if(setup->dirty & LP_SETUP_NEW_FS) {
 547       if(!setup->fs.stored ||
 548          memcmp(setup->fs.stored,
 549                 &setup->fs.current,
 550                 sizeof setup->fs.current) != 0) {
 551          /* The fs state that's been stored in the scene is different from
 552           * the new, current state.  So allocate a new lp_rast_state object
 553           * and append it to the bin's setup data buffer.
 554           */
 555          struct lp_rast_state *stored =
 556             (struct lp_rast_state *) lp_scene_alloc(scene, sizeof *stored);
 557          if(stored) {
 558             memcpy(stored,
 559                    &setup->fs.current,
 560                    sizeof setup->fs.current);
 561             setup->fs.stored = stored;
 562
 563             /* put the state-set command into all bins */
 564             lp_scene_bin_state_command( scene,
 565                                         lp_rast_set_state,
 566                                         lp_rast_arg_state(setup->fs.stored) );
 567          }
 568       }
 569    }
 570
 571    setup->dirty = 0;
 572
 573    assert(setup->fs.stored);
 574 }
 575
 576
 577
 578 /* Only caller is lp_setup_vbuf_destroy()
 579  */
 580 void
 581 lp_setup_destroy( struct setup_context *setup )
 582 {
 583    reset_context( setup );
 584
 585    pipe_buffer_reference(&setup->constants.current, NULL);
 586
 587    /* free the scenes in the 'empty' queue */
 588    while (lp_scene_queue_count(setup->empty_scenes) > 0) {
 589       struct lp_scene *scene = lp_scene_dequeue(setup->empty_scenes);
 590       if (!scene)
 591          break;
 592       lp_scene_destroy(scene);
 593    }
 594
 595    lp_rast_destroy( setup->rast );
 596
 597    FREE( setup );
 598 }
 599
 600
 601 /**
 602  * Create a new primitive tiling engine.  Plug it into the backend of
 603  * the draw module.  Currently also creates a rasterizer to use with
 604  * it.
 605  */
 606 struct setup_context *
 607 lp_setup_create( struct pipe_screen *screen,
 608                  struct draw_context *draw )
 609 {
 610    unsigned i;
 611    struct setup_context *setup = CALLOC_STRUCT(setup_context);
 612
 613    if (!setup)
 614       return NULL;
 615
 616    lp_setup_init_vbuf(setup);
 617
 618    setup->empty_scenes = lp_scene_queue_create();
 619    if (!setup->empty_scenes)
 620       goto fail;
 621
 622    setup->rast = lp_rast_create( screen, setup->empty_scenes );
 623    if (!setup->rast)
 624       goto fail;
 625
 626    setup->vbuf = draw_vbuf_stage(draw, &setup->base);
 627    if (!setup->vbuf)
 628       goto fail;
 629
 630    draw_set_rasterize_stage(draw, setup->vbuf);
 631    draw_set_render(draw, &setup->base);
 632
 633    /* create some empty scenes */
 634    for (i = 0; i < MAX_SCENES; i++) {
 635       struct lp_scene *scene = lp_scene_create();
 636       lp_scene_enqueue(setup->empty_scenes, scene);
 637    }
 638
 639    setup->triangle = first_triangle;
 640    setup->line     = first_line;
 641    setup->point    = first_point;
 642
 643    setup->dirty = ~0;
 644
 645    return setup;
 646
 647 fail:
 648    if (setup->rast)
 649       lp_rast_destroy( setup->rast );
 650
 651    if (setup->vbuf)
 652       ;
 653
 654    if (setup->empty_scenes)
 655       lp_scene_queue_destroy(setup->empty_scenes);
 656
 657    FREE(setup);
 658    return NULL;
 659 }
 660