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_framebuffer.h"
  29 #include "util/u_math.h"
  30 #include "util/u_memory.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_simple_list.h"
  33 #include "lp_scene.h"
  34 #include "lp_scene_queue.h"
  35 #include "lp_fence.h"
  36
  37
  38 /** List of texture references */
  39 struct texture_ref {
  40    struct pipe_resource *texture;
  41    struct texture_ref *prev, *next;  /**< linked list w/ u_simple_list.h */
  42 };
  43
  44
  45
  46 /**
  47  * Create a new scene object.
  48  * \param queue  the queue to put newly rendered/emptied scenes into
  49  */
  50 struct lp_scene *
  51 lp_scene_create( struct pipe_context *pipe,
  52                  struct lp_scene_queue *queue )
  53 {
  54    unsigned i, j;
  55    struct lp_scene *scene = CALLOC_STRUCT(lp_scene);
  56    if (!scene)
  57       return NULL;
  58
  59    scene->pipe = pipe;
  60    scene->empty_queue = queue;
  61
  62    for (i = 0; i < TILES_X; i++) {
  63       for (j = 0; j < TILES_Y; j++) {
  64          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
  65          bin->commands.head = bin->commands.tail = CALLOC_STRUCT(cmd_block);
  66       }
  67    }
  68
  69    scene->data.head =
  70       scene->data.tail = CALLOC_STRUCT(data_block);
  71
  72    make_empty_list(&scene->resources);
  73
  74    pipe_mutex_init(scene->mutex);
  75
  76    return scene;
  77 }
  78
  79
  80 /**
  81  * Free all data associated with the given scene, and the scene itself.
  82  */
  83 void
  84 lp_scene_destroy(struct lp_scene *scene)
  85 {
  86    unsigned i, j;
  87
  88    lp_scene_reset(scene);
  89
  90    for (i = 0; i < TILES_X; i++)
  91       for (j = 0; j < TILES_Y; j++) {
  92          struct cmd_bin *bin = lp_scene_get_bin(scene, i, j);
  93          assert(bin->commands.head == bin->commands.tail);
  94          FREE(bin->commands.head);
  95          bin->commands.head = NULL;
  96          bin->commands.tail = NULL;
  97       }
  98
  99    FREE(scene->data.head);
 100    scene->data.head = NULL;
 101
 102    pipe_mutex_destroy(scene->mutex);
 103
 104    FREE(scene);
 105 }
 106
 107
 108 /**
 109  * Check if the scene's bins are all empty.
 110  * For debugging purposes.
 111  */
 112 boolean
 113 lp_scene_is_empty(struct lp_scene *scene )
 114 {
 115    unsigned x, y;
 116
 117    for (y = 0; y < TILES_Y; y++) {
 118       for (x = 0; x < TILES_X; x++) {
 119          const struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 120          const struct cmd_block_list *list = &bin->commands;
 121          if (list->head != list->tail || list->head->count > 0) {
 122             return FALSE;
 123          }
 124       }
 125    }
 126    return TRUE;
 127 }
 128
 129
 130 /* Free data for one particular bin.  May be called from the
 131  * rasterizer thread(s).
 132  */
 133 void
 134 lp_scene_bin_reset(struct lp_scene *scene, unsigned x, unsigned y)
 135 {
 136    struct cmd_bin *bin = lp_scene_get_bin(scene, x, y);
 137    struct cmd_block_list *list = &bin->commands;
 138    struct cmd_block *block;
 139    struct cmd_block *tmp;
 140
 141    assert(x < TILES_X);
 142    assert(y < TILES_Y);
 143
 144    for (block = list->head; block != list->tail; block = tmp) {
 145       tmp = block->next;
 146       FREE(block);
 147    }
 148
 149    assert(list->tail->next == NULL);
 150    list->head = list->tail;
 151    list->head->count = 0;
 152 }
 153
 154
 155 /**
 156  * Free all the temporary data in a scene.  May be called from the
 157  * rasterizer thread(s).
 158  */
 159 void
 160 lp_scene_reset(struct lp_scene *scene )
 161 {
 162    unsigned i, j;
 163
 164    /* Free all but last binner command lists:
 165     */
 166    for (i = 0; i < scene->tiles_x; i++) {
 167       for (j = 0; j < scene->tiles_y; j++) {
 168          lp_scene_bin_reset(scene, i, j);
 169       }
 170    }
 171
 172    /* If there are any bins which weren't cleared by the loop above,
 173     * they will be caught (on debug builds at least) by this assert:
 174     */
 175    assert(lp_scene_is_empty(scene));
 176
 177    /* Free all but last binned data block:
 178     */
 179    {
 180       struct data_block_list *list = &scene->data;
 181       struct data_block *block, *tmp;
 182
 183       for (block = list->head; block != list->tail; block = tmp) {
 184          tmp = block->next;
 185          FREE(block);
 186       }
 187
 188       assert(list->tail->next == NULL);
 189       list->head = list->tail;
 190       list->head->used = 0;
 191    }
 192
 193    /* Release texture refs
 194     */
 195    {
 196       struct resource_ref *ref, *next, *ref_list = &scene->resources;
 197       for (ref = ref_list->next; ref != ref_list; ref = next) {
 198          next = next_elem(ref);
 199          pipe_resource_reference(&ref->resource, NULL);
 200          FREE(ref);
 201       }
 202       make_empty_list(ref_list);
 203    }
 204
 205    lp_fence_reference(&scene->fence, NULL);
 206
 207    scene->scene_size = 0;
 208
 209    scene->has_color_clear = FALSE;
 210    scene->has_depthstencil_clear = FALSE;
 211 }
 212
 213
 214
 215
 216
 217
 218 struct cmd_block *
 219 lp_bin_new_cmd_block( struct cmd_block_list *list )
 220 {
 221    struct cmd_block *block = MALLOC_STRUCT(cmd_block);
 222    if (block) {
 223       list->tail->next = block;
 224       list->tail = block;
 225       block->next = NULL;
 226       block->count = 0;
 227    }
 228    return block;
 229 }
 230
 231
 232 struct data_block *
 233 lp_bin_new_data_block( struct data_block_list *list )
 234 {
 235    struct data_block *block = MALLOC_STRUCT(data_block);
 236    if (block) {
 237       list->tail->next = block;
 238       list->tail = block;
 239       block->next = NULL;
 240       block->used = 0;
 241    }
 242    return block;
 243 }
 244
 245
 246 /**
 247  * Return number of bytes used for all bin data within a scene.
 248  * This does not include resources (textures) referenced by the scene.
 249  */
 250 unsigned
 251 lp_scene_data_size( const struct lp_scene *scene )
 252 {
 253    unsigned size = 0;
 254    const struct data_block *block;
 255    for (block = scene->data.head; block; block = block->next) {
 256       size += block->used;
 257    }
 258    return size;
 259 }
 260
 261
 262 /** Return number of bytes used for a single bin */
 263 unsigned
 264 lp_scene_bin_size( const struct lp_scene *scene, unsigned x, unsigned y )
 265 {
 266    struct cmd_bin *bin = lp_scene_get_bin((struct lp_scene *) scene, x, y);
 267    const struct cmd_block *cmd;
 268    unsigned size = 0;
 269    for (cmd = bin->commands.head; cmd; cmd = cmd->next) {
 270       size += (cmd->count *
 271                (sizeof(lp_rast_cmd) + sizeof(union lp_rast_cmd_arg)));
 272    }
 273    return size;
 274 }
 275
 276
 277 /**
 278  * Add a reference to a resource by the scene.
 279  */
 280 void
 281 lp_scene_add_resource_reference(struct lp_scene *scene,
 282                                 struct pipe_resource *resource)
 283 {
 284    struct resource_ref *ref = CALLOC_STRUCT(resource_ref);
 285    if (ref) {
 286       struct resource_ref *ref_list = &scene->resources;
 287       pipe_resource_reference(&ref->resource, resource);
 288       insert_at_tail(ref_list, ref);
 289    }
 290
 291    scene->scene_size += llvmpipe_resource_size(resource);
 292 }
 293
 294
 295 /**
 296  * Does this scene have a reference to the given resource?
 297  */
 298 boolean
 299 lp_scene_is_resource_referenced(const struct lp_scene *scene,
 300                                 const struct pipe_resource *resource)
 301 {
 302    const struct resource_ref *ref_list = &scene->resources;
 303    const struct resource_ref *ref;
 304    foreach (ref, ref_list) {
 305       if (ref->resource == resource)
 306          return TRUE;
 307    }
 308    return FALSE;
 309 }
 310
 311
 312
 313
 314 /** advance curr_x,y to the next bin */
 315 static boolean
 316 next_bin(struct lp_scene *scene)
 317 {
 318    scene->curr_x++;
 319    if (scene->curr_x >= scene->tiles_x) {
 320       scene->curr_x = 0;
 321       scene->curr_y++;
 322    }
 323    if (scene->curr_y >= scene->tiles_y) {
 324       /* no more bins */
 325       return FALSE;
 326    }
 327    return TRUE;
 328 }
 329
 330
 331 void
 332 lp_scene_bin_iter_begin( struct lp_scene *scene )
 333 {
 334    scene->curr_x = scene->curr_y = -1;
 335 }
 336
 337
 338 /**
 339  * Return pointer to next bin to be rendered.
 340  * The lp_scene::curr_x and ::curr_y fields will be advanced.
 341  * Multiple rendering threads will call this function to get a chunk
 342  * of work (a bin) to work on.
 343  */
 344 struct cmd_bin *
 345 lp_scene_bin_iter_next( struct lp_scene *scene, int *bin_x, int *bin_y )
 346 {
 347    struct cmd_bin *bin = NULL;
 348
 349    pipe_mutex_lock(scene->mutex);
 350
 351    if (scene->curr_x < 0) {
 352       /* first bin */
 353       scene->curr_x = 0;
 354       scene->curr_y = 0;
 355    }
 356    else if (!next_bin(scene)) {
 357       /* no more bins left */
 358       goto end;
 359    }
 360
 361    bin = lp_scene_get_bin(scene, scene->curr_x, scene->curr_y);
 362    *bin_x = scene->curr_x;
 363    *bin_y = scene->curr_y;
 364
 365 end:
 366    /*printf("return bin %p at %d, %d\n", (void *) bin, *bin_x, *bin_y);*/
 367    pipe_mutex_unlock(scene->mutex);
 368    return bin;
 369 }
 370
 371
 372 void lp_scene_begin_binning( struct lp_scene *scene,
 373                              struct pipe_framebuffer_state *fb )
 374 {
 375    assert(lp_scene_is_empty(scene));
 376
 377    util_copy_framebuffer_state(&scene->fb, fb);
 378
 379    scene->tiles_x = align(fb->width, TILE_SIZE) / TILE_SIZE;
 380    scene->tiles_y = align(fb->height, TILE_SIZE) / TILE_SIZE;
 381
 382    assert(scene->tiles_x <= TILES_X);
 383    assert(scene->tiles_y <= TILES_Y);
 384 }
 385
 386
 387 void lp_scene_rasterize( struct lp_scene *scene,
 388                          struct lp_rasterizer *rast )
 389 {
 390    if (0) {
 391       unsigned x, y;
 392       debug_printf("rasterize scene:\n");
 393       debug_printf("  data size: %u\n", lp_scene_data_size(scene));
 394       for (y = 0; y < scene->tiles_y; y++) {
 395          for (x = 0; x < scene->tiles_x; x++) {
 396             debug_printf("  bin %u, %u size: %u\n", x, y,
 397                          lp_scene_bin_size(scene, x, y));
 398          }
 399       }
 400    }
 401
 402    /* Enqueue the scene for rasterization, then immediately wait for
 403     * it to finish.
 404     */
 405    lp_rast_queue_scene( rast, scene );
 406
 407    /* Currently just wait for the rasterizer to finish.  Some
 408     * threading interactions need to be worked out, particularly once
 409     * transfers become per-context:
 410     */
 411    lp_rast_finish( rast );
 412
 413    util_unreference_framebuffer_state( &scene->fb );
 414
 415    /* put scene into the empty list */
 416    lp_scene_enqueue( scene->empty_queue, scene );
 417 }