src/gallium/drivers/llvmpipe/lp_scene.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   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 VMWARE 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 #include "util/u_math.h"
  29 #include "util/u_memory.h"
  30 #include "util/u_inlines.h"
  31 #include "util/u_simple_list.h"
  32 #include "util/u_surface.h"
  33 #include "lp_scene.h"
  34 #include "lp_scene_queue.h"
  35 #include "lp_debug.h"
  36
  37
  38 struct lp_scene *
  39 lp_scene_create( struct pipe_context *pipe,
  40                  struct lp_scene_queue *queue )
  41 {
  42    unsigned i, j;
  43    struct lp_scene *scene = CALLOC_STRUCT(lp_scene);
  44    if (!scene)
  45       return NULL;
  46
  47    scene->pipe = pipe;
  48    scene->empty_queue = queue;
  49
  50    for (i = 0; i < TILES_X; i++) {
  51       for (j = 0; j < TILES_Y; j++) {
  52          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
  53          bin->commands.head = bin->commands.tail = CALLOC_STRUCT(cmd_block);
  54       }
  55    }
  56
  57    scene->data.head =
  58       scene->data.tail = CALLOC_STRUCT(data_block);
  59
  60    make_empty_list(&scene->textures);
  61
  62    pipe_mutex_init(scene->mutex);
  63
  64    return scene;
  65 }
  66
  67
  68 /**
  69  * Free all data associated with the given scene, and free(scene).
  70  */
  71 void
  72 lp_scene_destroy(struct lp_scene *scene)
  73 {
  74    unsigned i, j;
  75
  76    lp_scene_reset(scene);
  77
  78    for (i = 0; i < TILES_X; i++)
  79       for (j = 0; j < TILES_Y; j++) {
  80          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
  81          assert(bin->commands.head == bin->commands.tail);
  82          FREE(bin->commands.head);
  83          bin->commands.head = NULL;
  84          bin->commands.tail = NULL;
  85       }
  86
  87    FREE(scene->data.head);
  88    scene->data.head = NULL;
  89
  90    pipe_mutex_destroy(scene->mutex);
  91
  92    FREE(scene);
  93 }
  94
  95
  96 /**
  97  * Check if the scene's bins are all empty.
  98  * For debugging purposes.
  99  */
 100 boolean
 101 lp_scene_is_empty(struct lp_scene *scene )
 102 {
 103    unsigned x, y;
 104
 105    for (y = 0; y < TILES_Y; y++) {
 106       for (x = 0; x < TILES_X; x++) {
 107          const struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 108          const struct cmd_block_list *list = &bin->commands;
 109          if (list->head != list->tail || list->head->count > 0) {
 110             return FALSE;
 111          }
 112       }
 113    }
 114    return TRUE;
 115 }
 116
 117
 118 /* Free data for one particular bin.  May be called from the
 119  * rasterizer thread(s).
 120  */
 121 void
 122 lp_scene_bin_reset(struct lp_scene *scene, unsigned x, unsigned y)
 123 {
 124    struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 125    struct cmd_block_list *list = &bin->commands;
 126    struct cmd_block *block;
 127    struct cmd_block *tmp;
 128
 129    assert(x < TILES_X);
 130    assert(y < TILES_Y);
 131
 132    for (block = list->head; block != list->tail; block = tmp) {
 133       tmp = block->next;
 134       FREE(block);
 135    }
 136
 137    assert(list->tail->next == NULL);
 138    list->head = list->tail;
 139    list->head->count = 0;
 140 }
 141
 142
 143 /**
 144  * Free all the temporary data in a scene.  May be called from the
 145  * rasterizer thread(s).
 146  */
 147 void
 148 lp_scene_reset(struct lp_scene *scene )
 149 {
 150    unsigned i, j;
 151
 152    /* Free all but last binner command lists:
 153     */
 154    for (i = 0; i < scene->tiles_x; i++) {
 155       for (j = 0; j < scene->tiles_y; j++) {
 156          lp_scene_bin_reset(scene, i, j);
 157       }
 158    }
 159
 160    assert(lp_scene_is_empty(scene));
 161
 162    /* Free all but last binned data block:
 163     */
 164    {
 165       struct data_block_list *list = &scene->data;
 166       struct data_block *block, *tmp;
 167
 168       for (block = list->head; block != list->tail; block = tmp) {
 169          tmp = block->next;
 170          FREE(block);
 171       }
 172
 173       assert(list->tail->next == NULL);
 174       list->head = list->tail;
 175       list->head->used = 0;
 176    }
 177
 178    /* Release texture refs
 179     */
 180    {
 181       struct texture_ref *ref, *next, *ref_list = &scene->textures;
 182       for (ref = ref_list->next; ref != ref_list; ref = next) {
 183          next = next_elem(ref);
 184          pipe_resource_reference(&ref->texture, NULL);
 185          FREE(ref);
 186       }
 187       make_empty_list(ref_list);
 188    }
 189 }
 190
 191
 192
 193
 194
 195
 196 void
 197 lp_bin_new_cmd_block( struct cmd_block_list *list )
 198 {
 199    struct cmd_block *block = MALLOC_STRUCT(cmd_block);
 200    list->tail->next = block;
 201    list->tail = block;
 202    block->next = NULL;
 203    block->count = 0;
 204 }
 205
 206
 207 void
 208 lp_bin_new_data_block( struct data_block_list *list )
 209 {
 210    struct data_block *block = MALLOC_STRUCT(data_block);
 211    list->tail->next = block;
 212    list->tail = block;
 213    block->next = NULL;
 214    block->used = 0;
 215 }
 216
 217
 218 /** Return number of bytes used for all bin data within a scene */
 219 unsigned
 220 lp_scene_data_size( const struct lp_scene *scene )
 221 {
 222    unsigned size = 0;
 223    const struct data_block *block;
 224    for (block = scene->data.head; block; block = block->next) {
 225       size += block->used;
 226    }
 227    return size;
 228 }
 229
 230
 231 /** Return number of bytes used for a single bin */
 232 unsigned
 233 lp_scene_bin_size( const struct lp_scene *scene, unsigned x, unsigned y )
 234 {
 235    struct cmd_bin *bin = lp_scene_get_bin((struct lp_scene *) scene, x, y);
 236    const struct cmd_block *cmd;
 237    unsigned size = 0;
 238    for (cmd = bin->commands.head; cmd; cmd = cmd->next) {
 239       size += (cmd->count *
 240                (sizeof(lp_rast_cmd) + sizeof(union lp_rast_cmd_arg)));
 241    }
 242    return size;
 243 }
 244
 245
 246 /**
 247  * Add a reference to a texture by the scene.
 248  */
 249 void
 250 lp_scene_texture_reference( struct lp_scene *scene,
 251                             struct pipe_resource *texture )
 252 {
 253    struct texture_ref *ref = CALLOC_STRUCT(texture_ref);
 254    if (ref) {
 255       struct texture_ref *ref_list = &scene->textures;
 256       pipe_resource_reference(&ref->texture, texture);
 257       insert_at_tail(ref_list, ref);
 258    }
 259 }
 260
 261
 262 /**
 263  * Does this scene have a reference to the given texture?
 264  */
 265 boolean
 266 lp_scene_is_resource_referenced( const struct lp_scene *scene,
 267                                 const struct pipe_resource *texture )
 268 {
 269    const struct texture_ref *ref_list = &scene->textures;
 270    const struct texture_ref *ref;
 271    foreach (ref, ref_list) {
 272       if (ref->texture == texture)
 273          return TRUE;
 274    }
 275    return FALSE;
 276 }
 277
 278
 279 /**
 280  * Return last command in the bin
 281  */
 282 static lp_rast_cmd
 283 lp_get_last_command( const struct cmd_bin *bin )
 284 {
 285    const struct cmd_block *tail = bin->commands.tail;
 286    const unsigned i = tail->count;
 287    if (i > 0)
 288       return tail->cmd[i - 1];
 289    else
 290       return NULL;
 291 }
 292
 293
 294 /**
 295  * Replace the arg of the last command in the bin.
 296  */
 297 static void
 298 lp_replace_last_command_arg( struct cmd_bin *bin,
 299                              const union lp_rast_cmd_arg arg )
 300 {
 301    struct cmd_block *tail = bin->commands.tail;
 302    const unsigned i = tail->count;
 303    assert(i > 0);
 304    tail->arg[i - 1] = arg;
 305 }
 306
 307
 308
 309 /**
 310  * Put a state-change command into all bins.
 311  * If we find that the last command in a bin was also a state-change
 312  * command, we can simply replace that one with the new one.
 313  */
 314 void
 315 lp_scene_bin_state_command( struct lp_scene *scene,
 316                             lp_rast_cmd cmd,
 317                             const union lp_rast_cmd_arg arg )
 318 {
 319    unsigned i, j;
 320    for (i = 0; i < scene->tiles_x; i++) {
 321       for (j = 0; j < scene->tiles_y; j++) {
 322          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
 323          lp_rast_cmd last_cmd = lp_get_last_command(bin);
 324          if (last_cmd == cmd) {
 325             lp_replace_last_command_arg(bin, arg);
 326          }
 327          else {
 328             lp_scene_bin_command( scene, i, j, cmd, arg );
 329          }
 330       }
 331    }
 332 }
 333
 334
 335 /** advance curr_x,y to the next bin */
 336 static boolean
 337 next_bin(struct lp_scene *scene)
 338 {
 339    scene->curr_x++;
 340    if (scene->curr_x >= scene->tiles_x) {
 341       scene->curr_x = 0;
 342       scene->curr_y++;
 343    }
 344    if (scene->curr_y >= scene->tiles_y) {
 345       /* no more bins */
 346       return FALSE;
 347    }
 348    return TRUE;
 349 }
 350
 351
 352 void
 353 lp_scene_bin_iter_begin( struct lp_scene *scene )
 354 {
 355    scene->curr_x = scene->curr_y = -1;
 356 }
 357
 358
 359 /**
 360  * Return pointer to next bin to be rendered.
 361  * The lp_scene::curr_x and ::curr_y fields will be advanced.
 362  * Multiple rendering threads will call this function to get a chunk
 363  * of work (a bin) to work on.
 364  */
 365 struct cmd_bin *
 366 lp_scene_bin_iter_next( struct lp_scene *scene, int *bin_x, int *bin_y )
 367 {
 368    struct cmd_bin *bin = NULL;
 369
 370    pipe_mutex_lock(scene->mutex);
 371
 372    if (scene->curr_x < 0) {
 373       /* first bin */
 374       scene->curr_x = 0;
 375       scene->curr_y = 0;
 376    }
 377    else if (!next_bin(scene)) {
 378       /* no more bins left */
 379       goto end;
 380    }
 381
 382    bin = lp_scene_get_bin(scene, scene->curr_x, scene->curr_y);
 383    *bin_x = scene->curr_x;
 384    *bin_y = scene->curr_y;
 385
 386 end:
 387    /*printf("return bin %p at %d, %d\n", (void *) bin, *bin_x, *bin_y);*/
 388    pipe_mutex_unlock(scene->mutex);
 389    return bin;
 390 }
 391
 392
 393 /**
 394  * Prepare this scene for the rasterizer.
 395  * Map the framebuffer surfaces.  Initialize the 'rast' state.
 396  */
 397 static boolean
 398 lp_scene_map_buffers( struct lp_scene *scene )
 399 {
 400    struct pipe_surface *cbuf, *zsbuf;
 401    unsigned usage;
 402    int i;
 403
 404    LP_DBG(DEBUG_RAST, "%s\n", __FUNCTION__);
 405
 406    /* XXX: try to improve on this:
 407     */
 408    usage = PIPE_TRANSFER_READ_WRITE;
 409
 410    /* Map all color buffers
 411     */
 412    for (i = 0; i < scene->fb.nr_cbufs; i++) {
 413       cbuf = scene->fb.cbufs[i];
 414       if (cbuf) {
 415          scene->cbuf_map[i] = llvmpipe_resource_map(cbuf->texture,
 416                                                     usage,
 417                                                     cbuf->face,
 418                                                     cbuf->level,
 419                                                     cbuf->zslice);
 420          if (!scene->cbuf_map[i])
 421             goto fail;
 422       }
 423    }
 424
 425    /* Map the zsbuffer
 426     */
 427    zsbuf = scene->fb.zsbuf;
 428    if (zsbuf) {
 429       scene->zsbuf_map = llvmpipe_resource_map(zsbuf->texture,
 430                                                usage,
 431                                                zsbuf->face,
 432                                                zsbuf->level,
 433                                                zsbuf->zslice);
 434       if (!scene->zsbuf_map)
 435          goto fail;
 436    }
 437
 438    return TRUE;
 439
 440 fail:
 441    /* Unmap and release transfers?
 442     */
 443    return FALSE;
 444 }
 445
 446
 447
 448 /**
 449  * Called after rasterizer as finished rasterizing a scene.
 450  *
 451  * We want to call this from the pipe_context's current thread to
 452  * avoid having to have mutexes on the transfer functions.
 453  */
 454 static void
 455 lp_scene_unmap_buffers( struct lp_scene *scene )
 456 {
 457    unsigned i;
 458
 459    for (i = 0; i < scene->fb.nr_cbufs; i++) {
 460       if (scene->cbuf_map[i]) {
 461          struct pipe_surface *cbuf = scene->fb.cbufs[i];
 462          llvmpipe_resource_unmap(cbuf->texture,
 463                                 cbuf->face,
 464                                 cbuf->level,
 465                                 cbuf->zslice);
 466          scene->cbuf_map[i] = NULL;
 467       }
 468    }
 469
 470    if (scene->zsbuf_map) {
 471       struct pipe_surface *zsbuf = scene->fb.zsbuf;
 472       llvmpipe_resource_unmap(zsbuf->texture,
 473                              zsbuf->face,
 474                              zsbuf->level,
 475                              zsbuf->zslice);
 476       scene->zsbuf_map = NULL;
 477    }
 478
 479    util_unreference_framebuffer_state( &scene->fb );
 480 }
 481
 482
 483 void lp_scene_begin_binning( struct lp_scene *scene,
 484                              struct pipe_framebuffer_state *fb )
 485 {
 486    assert(lp_scene_is_empty(scene));
 487
 488    util_copy_framebuffer_state(&scene->fb, fb);
 489
 490    scene->tiles_x = align(fb->width, TILE_SIZE) / TILE_SIZE;
 491    scene->tiles_y = align(fb->height, TILE_SIZE) / TILE_SIZE;
 492
 493    assert(scene->tiles_x <= TILES_X);
 494    assert(scene->tiles_y <= TILES_Y);
 495 }
 496
 497
 498 void lp_scene_rasterize( struct lp_scene *scene,
 499                          struct lp_rasterizer *rast,
 500                          boolean write_depth )
 501 {
 502    if (0) {
 503       unsigned x, y;
 504       debug_printf("rasterize scene:\n");
 505       debug_printf("  data size: %u\n", lp_scene_data_size(scene));
 506       for (y = 0; y < scene->tiles_y; y++) {
 507          for (x = 0; x < scene->tiles_x; x++) {
 508             debug_printf("  bin %u, %u size: %u\n", x, y,
 509                          lp_scene_bin_size(scene, x, y));
 510          }
 511       }
 512    }
 513
 514
 515    scene->write_depth = (scene->fb.zsbuf != NULL &&
 516                          write_depth);
 517
 518    lp_scene_map_buffers( scene );
 519
 520    /* Enqueue the scene for rasterization, then immediately wait for
 521     * it to finish.
 522     */
 523    lp_rast_queue_scene( rast, scene );
 524
 525    /* Currently just wait for the rasterizer to finish.  Some
 526     * threading interactions need to be worked out, particularly once
 527     * transfers become per-context:
 528     */
 529    lp_rast_finish( rast );
 530    lp_scene_unmap_buffers( scene );
 531    lp_scene_enqueue( scene->empty_queue, scene );
 532 }