src/gallium/drivers/llvmpipe/lp_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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   * Authors:
  29   *   Keith Whitwell <keithw@vmware.com>
  30   *   Michel Dänzer <daenzer@vmware.com>
  31   */
  32
  33 #include <stdio.h>
  34
  35 #include "pipe/p_context.h"
  36 #include "pipe/p_defines.h"
  37
  38 #include "util/u_inlines.h"
  39 #include "util/u_cpu_detect.h"
  40 #include "util/u_format.h"
  41 #include "util/u_math.h"
  42 #include "util/u_memory.h"
  43 #include "util/u_simple_list.h"
  44 #include "util/u_transfer.h"
  45
  46 #include "lp_context.h"
  47 #include "lp_flush.h"
  48 #include "lp_screen.h"
  49 #include "lp_texture.h"
  50 #include "lp_setup.h"
  51 #include "lp_state.h"
  52 #include "lp_rast.h"
  53
  54 #include "state_tracker/sw_winsys.h"
  55
  56
  57 #ifdef DEBUG
  58 static struct llvmpipe_resource resource_list;
  59 #endif
  60 static unsigned id_counter = 0;
  61
  62
  63 /**
  64  * Conventional allocation path for non-display textures:
  65  * Compute strides and allocate data (unless asked not to).
  66  */
  67 static boolean
  68 llvmpipe_texture_layout(struct llvmpipe_screen *screen,
  69                         struct llvmpipe_resource *lpr,
  70                         boolean allocate)
  71 {
  72    struct pipe_resource *pt = &lpr->base;
  73    unsigned level;
  74    unsigned width = pt->width0;
  75    unsigned height = pt->height0;
  76    unsigned depth = pt->depth0;
  77    uint64_t total_size = 0;
  78    unsigned layers = pt->array_size;
  79    /* XXX:
  80     * This alignment here (same for displaytarget) was added for the purpose of
  81     * ARB_map_buffer_alignment. I am not convinced it's needed for non-buffer
  82     * resources. Otherwise we'd want the max of cacheline size and 16 (max size
  83     * of a block for all formats) though this should not be strictly necessary
  84     * neither. In any case it can only affect compressed or 1d textures.
  85     */
  86    unsigned mip_align = MAX2(64, util_cpu_caps.cacheline);
  87
  88    assert(LP_MAX_TEXTURE_2D_LEVELS <= LP_MAX_TEXTURE_LEVELS);
  89    assert(LP_MAX_TEXTURE_3D_LEVELS <= LP_MAX_TEXTURE_LEVELS);
  90
  91    for (level = 0; level <= pt->last_level; level++) {
  92       uint64_t mipsize;
  93       unsigned align_x, align_y, nblocksx, nblocksy, block_size, num_slices;
  94
  95       /* Row stride and image stride */
  96
  97       /* For non-compressed formats we need 4x4 pixel alignment
  98        * so we can read/write LP_RASTER_BLOCK_SIZE when rendering to them.
  99        * We also want cache line size in x direction,
 100        * otherwise same cache line could end up in multiple threads.
 101        * For explicit 1d resources however we reduce this to 4x1 and
 102        * handle specially in render output code (as we need to do special
 103        * handling there for buffers in any case).
 104        */
 105       if (util_format_is_compressed(pt->format))
 106          align_x = align_y = 1;
 107       else {
 108          align_x = LP_RASTER_BLOCK_SIZE;
 109          if (llvmpipe_resource_is_1d(&lpr->base))
 110             align_y = 1;
 111          else
 112             align_y = LP_RASTER_BLOCK_SIZE;
 113       }
 114
 115       nblocksx = util_format_get_nblocksx(pt->format,
 116                                           align(width, align_x));
 117       nblocksy = util_format_get_nblocksy(pt->format,
 118                                           align(height, align_y));
 119       block_size = util_format_get_blocksize(pt->format);
 120
 121       if (util_format_is_compressed(pt->format))
 122          lpr->row_stride[level] = nblocksx * block_size;
 123       else
 124          lpr->row_stride[level] = align(nblocksx * block_size, util_cpu_caps.cacheline);
 125
 126       /* if row_stride * height > LP_MAX_TEXTURE_SIZE */
 127       if ((uint64_t)lpr->row_stride[level] * nblocksy > LP_MAX_TEXTURE_SIZE) {
 128          /* image too large */
 129          goto fail;
 130       }
 131
 132       lpr->img_stride[level] = lpr->row_stride[level] * nblocksy;
 133
 134       /* Number of 3D image slices, cube faces or texture array layers */
 135       if (lpr->base.target == PIPE_TEXTURE_CUBE)
 136          num_slices = 6;
 137       else if (lpr->base.target == PIPE_TEXTURE_3D)
 138          num_slices = depth;
 139       else if (lpr->base.target == PIPE_TEXTURE_1D_ARRAY ||
 140                lpr->base.target == PIPE_TEXTURE_2D_ARRAY)
 141          num_slices = layers;
 142       else
 143          num_slices = 1;
 144
 145       /* if img_stride * num_slices_faces > LP_MAX_TEXTURE_SIZE */
 146       mipsize = (uint64_t)lpr->img_stride[level] * num_slices;
 147       if (mipsize > LP_MAX_TEXTURE_SIZE) {
 148          /* volume too large */
 149          goto fail;
 150       }
 151
 152       lpr->mip_offsets[level] = total_size;
 153
 154       total_size += align((unsigned)mipsize, mip_align);
 155       if (total_size > LP_MAX_TEXTURE_SIZE) {
 156          goto fail;
 157       }
 158
 159       /* Compute size of next mipmap level */
 160       width = u_minify(width, 1);
 161       height = u_minify(height, 1);
 162       depth = u_minify(depth, 1);
 163    }
 164
 165    if (allocate) {
 166       lpr->tex_data = align_malloc(total_size, mip_align);
 167       if (!lpr->tex_data) {
 168          return FALSE;
 169       }
 170       else {
 171          memset(lpr->tex_data, 0, total_size);
 172       }
 173    }
 174
 175    return TRUE;
 176
 177 fail:
 178    return FALSE;
 179 }
 180
 181
 182 /**
 183  * Check the size of the texture specified by 'res'.
 184  * \return TRUE if OK, FALSE if too large.
 185  */
 186 static boolean
 187 llvmpipe_can_create_resource(struct pipe_screen *screen,
 188                              const struct pipe_resource *res)
 189 {
 190    struct llvmpipe_resource lpr;
 191    memset(&lpr, 0, sizeof(lpr));
 192    lpr.base = *res;
 193    return llvmpipe_texture_layout(llvmpipe_screen(screen), &lpr, false);
 194 }
 195
 196
 197 static boolean
 198 llvmpipe_displaytarget_layout(struct llvmpipe_screen *screen,
 199                               struct llvmpipe_resource *lpr)
 200 {
 201    struct sw_winsys *winsys = screen->winsys;
 202
 203    /* Round up the surface size to a multiple of the tile size to
 204     * avoid tile clipping.
 205     */
 206    const unsigned width = MAX2(1, align(lpr->base.width0, TILE_SIZE));
 207    const unsigned height = MAX2(1, align(lpr->base.height0, TILE_SIZE));
 208
 209    lpr->dt = winsys->displaytarget_create(winsys,
 210                                           lpr->base.bind,
 211                                           lpr->base.format,
 212                                           width, height,
 213                                           64,
 214                                           &lpr->row_stride[0] );
 215
 216    if (lpr->dt == NULL)
 217       return FALSE;
 218
 219    {
 220       void *map = winsys->displaytarget_map(winsys, lpr->dt,
 221                                             PIPE_TRANSFER_WRITE);
 222
 223       if (map)
 224          memset(map, 0, height * lpr->row_stride[0]);
 225
 226       winsys->displaytarget_unmap(winsys, lpr->dt);
 227    }
 228
 229    return TRUE;
 230 }
 231
 232
 233 static struct pipe_resource *
 234 llvmpipe_resource_create(struct pipe_screen *_screen,
 235                          const struct pipe_resource *templat)
 236 {
 237    struct llvmpipe_screen *screen = llvmpipe_screen(_screen);
 238    struct llvmpipe_resource *lpr = CALLOC_STRUCT(llvmpipe_resource);
 239    if (!lpr)
 240       return NULL;
 241
 242    lpr->base = *templat;
 243    pipe_reference_init(&lpr->base.reference, 1);
 244    lpr->base.screen = &screen->base;
 245
 246    /* assert(lpr->base.bind); */
 247
 248    if (llvmpipe_resource_is_texture(&lpr->base)) {
 249       if (lpr->base.bind & (PIPE_BIND_DISPLAY_TARGET |
 250                             PIPE_BIND_SCANOUT |
 251                             PIPE_BIND_SHARED)) {
 252          /* displayable surface */
 253          if (!llvmpipe_displaytarget_layout(screen, lpr))
 254             goto fail;
 255       }
 256       else {
 257          /* texture map */
 258          if (!llvmpipe_texture_layout(screen, lpr, true))
 259             goto fail;
 260       }
 261    }
 262    else {
 263       /* other data (vertex buffer, const buffer, etc) */
 264       const uint bytes = templat->width0;
 265       assert(util_format_get_blocksize(templat->format) == 1);
 266       assert(templat->height0 == 1);
 267       assert(templat->depth0 == 1);
 268       assert(templat->last_level == 0);
 269       /*
 270        * Reserve some extra storage since if we'd render to a buffer we
 271        * read/write always LP_RASTER_BLOCK_SIZE pixels, but the element
 272        * offset doesn't need to be aligned to LP_RASTER_BLOCK_SIZE.
 273        */
 274       lpr->data = align_malloc(bytes + (LP_RASTER_BLOCK_SIZE - 1) * 4 * sizeof(float), 64);
 275
 276       /*
 277        * buffers don't really have stride but it's probably safer
 278        * (for code doing same calculations for buffers and textures)
 279        * to put something sane in there.
 280        */
 281       lpr->row_stride[0] = bytes;
 282       if (!lpr->data)
 283          goto fail;
 284       memset(lpr->data, 0, bytes);
 285    }
 286
 287    lpr->id = id_counter++;
 288
 289 #ifdef DEBUG
 290    insert_at_tail(&resource_list, lpr);
 291 #endif
 292
 293    return &lpr->base;
 294
 295  fail:
 296    FREE(lpr);
 297    return NULL;
 298 }
 299
 300
 301 static void
 302 llvmpipe_resource_destroy(struct pipe_screen *pscreen,
 303                           struct pipe_resource *pt)
 304 {
 305    struct llvmpipe_screen *screen = llvmpipe_screen(pscreen);
 306    struct llvmpipe_resource *lpr = llvmpipe_resource(pt);
 307
 308    if (lpr->dt) {
 309       /* display target */
 310       struct sw_winsys *winsys = screen->winsys;
 311       winsys->displaytarget_destroy(winsys, lpr->dt);
 312    }
 313    else if (llvmpipe_resource_is_texture(pt)) {
 314       /* free linear image data */
 315       if (lpr->tex_data) {
 316          align_free(lpr->tex_data);
 317          lpr->tex_data = NULL;
 318       }
 319    }
 320    else if (!lpr->userBuffer) {
 321       assert(lpr->data);
 322       align_free(lpr->data);
 323    }
 324
 325 #ifdef DEBUG
 326    if (lpr->next)
 327       remove_from_list(lpr);
 328 #endif
 329
 330    FREE(lpr);
 331 }
 332
 333
 334 /**
 335  * Map a resource for read/write.
 336  */
 337 void *
 338 llvmpipe_resource_map(struct pipe_resource *resource,
 339                       unsigned level,
 340                       unsigned layer,
 341                       enum lp_texture_usage tex_usage)
 342 {
 343    struct llvmpipe_resource *lpr = llvmpipe_resource(resource);
 344    uint8_t *map;
 345
 346    assert(level < LP_MAX_TEXTURE_LEVELS);
 347    assert(layer < (u_minify(resource->depth0, level) + resource->array_size - 1));
 348
 349    assert(tex_usage == LP_TEX_USAGE_READ ||
 350           tex_usage == LP_TEX_USAGE_READ_WRITE ||
 351           tex_usage == LP_TEX_USAGE_WRITE_ALL);
 352
 353    if (lpr->dt) {
 354       /* display target */
 355       struct llvmpipe_screen *screen = llvmpipe_screen(resource->screen);
 356       struct sw_winsys *winsys = screen->winsys;
 357       unsigned dt_usage;
 358
 359       if (tex_usage == LP_TEX_USAGE_READ) {
 360          dt_usage = PIPE_TRANSFER_READ;
 361       }
 362       else {
 363          dt_usage = PIPE_TRANSFER_READ_WRITE;
 364       }
 365
 366       assert(level == 0);
 367       assert(layer == 0);
 368
 369       /* FIXME: keep map count? */
 370       map = winsys->displaytarget_map(winsys, lpr->dt, dt_usage);
 371
 372       /* install this linear image in texture data structure */
 373       lpr->tex_data = map;
 374
 375       return map;
 376    }
 377    else if (llvmpipe_resource_is_texture(resource)) {
 378
 379       map = llvmpipe_get_texture_image_address(lpr, layer, level);
 380       return map;
 381    }
 382    else {
 383       return lpr->data;
 384    }
 385 }
 386
 387
 388 /**
 389  * Unmap a resource.
 390  */
 391 void
 392 llvmpipe_resource_unmap(struct pipe_resource *resource,
 393                        unsigned level,
 394                        unsigned layer)
 395 {
 396    struct llvmpipe_resource *lpr = llvmpipe_resource(resource);
 397
 398    if (lpr->dt) {
 399       /* display target */
 400       struct llvmpipe_screen *lp_screen = llvmpipe_screen(resource->screen);
 401       struct sw_winsys *winsys = lp_screen->winsys;
 402
 403       assert(level == 0);
 404       assert(layer == 0);
 405
 406       winsys->displaytarget_unmap(winsys, lpr->dt);
 407    }
 408 }
 409
 410
 411 void *
 412 llvmpipe_resource_data(struct pipe_resource *resource)
 413 {
 414    struct llvmpipe_resource *lpr = llvmpipe_resource(resource);
 415
 416    assert(!llvmpipe_resource_is_texture(resource));
 417
 418    return lpr->data;
 419 }
 420
 421
 422 static struct pipe_resource *
 423 llvmpipe_resource_from_handle(struct pipe_screen *screen,
 424                               const struct pipe_resource *template,
 425                               struct winsys_handle *whandle)
 426 {
 427    struct sw_winsys *winsys = llvmpipe_screen(screen)->winsys;
 428    struct llvmpipe_resource *lpr;
 429
 430    /* XXX Seems like from_handled depth textures doesn't work that well */
 431
 432    lpr = CALLOC_STRUCT(llvmpipe_resource);
 433    if (!lpr) {
 434       goto no_lpr;
 435    }
 436
 437    lpr->base = *template;
 438    pipe_reference_init(&lpr->base.reference, 1);
 439    lpr->base.screen = screen;
 440
 441    /*
 442     * Looks like unaligned displaytargets work just fine,
 443     * at least sampler/render ones.
 444     */
 445 #if 0
 446    assert(lpr->base.width0 == width);
 447    assert(lpr->base.height0 == height);
 448 #endif
 449
 450    lpr->dt = winsys->displaytarget_from_handle(winsys,
 451                                                template,
 452                                                whandle,
 453                                                &lpr->row_stride[0]);
 454    if (!lpr->dt) {
 455       goto no_dt;
 456    }
 457
 458    lpr->id = id_counter++;
 459
 460 #ifdef DEBUG
 461    insert_at_tail(&resource_list, lpr);
 462 #endif
 463
 464    return &lpr->base;
 465
 466 no_dt:
 467    FREE(lpr);
 468 no_lpr:
 469    return NULL;
 470 }
 471
 472
 473 static boolean
 474 llvmpipe_resource_get_handle(struct pipe_screen *screen,
 475                             struct pipe_resource *pt,
 476                             struct winsys_handle *whandle)
 477 {
 478    struct sw_winsys *winsys = llvmpipe_screen(screen)->winsys;
 479    struct llvmpipe_resource *lpr = llvmpipe_resource(pt);
 480
 481    assert(lpr->dt);
 482    if (!lpr->dt)
 483       return FALSE;
 484
 485    return winsys->displaytarget_get_handle(winsys, lpr->dt, whandle);
 486 }
 487
 488
 489 static void *
 490 llvmpipe_transfer_map( struct pipe_context *pipe,
 491                        struct pipe_resource *resource,
 492                        unsigned level,
 493                        unsigned usage,
 494                        const struct pipe_box *box,
 495                        struct pipe_transfer **transfer )
 496 {
 497    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
 498    struct llvmpipe_screen *screen = llvmpipe_screen(pipe->screen);
 499    struct llvmpipe_resource *lpr = llvmpipe_resource(resource);
 500    struct llvmpipe_transfer *lpt;
 501    struct pipe_transfer *pt;
 502    ubyte *map;
 503    enum pipe_format format;
 504    enum lp_texture_usage tex_usage;
 505    const char *mode;
 506
 507    assert(resource);
 508    assert(level <= resource->last_level);
 509
 510    /*
 511     * Transfers, like other pipe operations, must happen in order, so flush the
 512     * context if necessary.
 513     */
 514    if (!(usage & PIPE_TRANSFER_UNSYNCHRONIZED)) {
 515       boolean read_only = !(usage & PIPE_TRANSFER_WRITE);
 516       boolean do_not_block = !!(usage & PIPE_TRANSFER_DONTBLOCK);
 517       if (!llvmpipe_flush_resource(pipe, resource,
 518                                    level,
 519                                    read_only,
 520                                    TRUE, /* cpu_access */
 521                                    do_not_block,
 522                                    __FUNCTION__)) {
 523          /*
 524           * It would have blocked, but state tracker requested no to.
 525           */
 526          assert(do_not_block);
 527          return NULL;
 528       }
 529    }
 530
 531    /* Check if we're mapping the current constant buffer */
 532    if ((usage & PIPE_TRANSFER_WRITE) &&
 533        (resource->bind & PIPE_BIND_CONSTANT_BUFFER)) {
 534       unsigned i;
 535       for (i = 0; i < Elements(llvmpipe->constants[PIPE_SHADER_FRAGMENT]); ++i) {
 536          if (resource == llvmpipe->constants[PIPE_SHADER_FRAGMENT][i].buffer) {
 537             /* constants may have changed */
 538             llvmpipe->dirty |= LP_NEW_CONSTANTS;
 539             break;
 540          }
 541       }
 542    }
 543
 544    lpt = CALLOC_STRUCT(llvmpipe_transfer);
 545    if (!lpt)
 546       return NULL;
 547    pt = &lpt->base;
 548    pipe_resource_reference(&pt->resource, resource);
 549    pt->box = *box;
 550    pt->level = level;
 551    pt->stride = lpr->row_stride[level];
 552    pt->layer_stride = lpr->img_stride[level];
 553    pt->usage = usage;
 554    *transfer = pt;
 555
 556    assert(level < LP_MAX_TEXTURE_LEVELS);
 557
 558    /*
 559    printf("tex_transfer_map(%d, %d  %d x %d of %d x %d,  usage %d )\n",
 560           transfer->x, transfer->y, transfer->width, transfer->height,
 561           transfer->texture->width0,
 562           transfer->texture->height0,
 563           transfer->usage);
 564    */
 565
 566    if (usage == PIPE_TRANSFER_READ) {
 567       tex_usage = LP_TEX_USAGE_READ;
 568       mode = "read";
 569    }
 570    else {
 571       tex_usage = LP_TEX_USAGE_READ_WRITE;
 572       mode = "read/write";
 573    }
 574
 575    if (0) {
 576       printf("transfer map tex %u  mode %s\n", lpr->id, mode);
 577    }
 578
 579    format = lpr->base.format;
 580
 581    map = llvmpipe_resource_map(resource,
 582                                level,
 583                                box->z,
 584                                tex_usage);
 585
 586
 587    /* May want to do different things here depending on read/write nature
 588     * of the map:
 589     */
 590    if (usage & PIPE_TRANSFER_WRITE) {
 591       /* Do something to notify sharing contexts of a texture change.
 592        */
 593       screen->timestamp++;
 594    }
 595
 596    map +=
 597       box->y / util_format_get_blockheight(format) * pt->stride +
 598       box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 599
 600    return map;
 601 }
 602
 603
 604 static void
 605 llvmpipe_transfer_unmap(struct pipe_context *pipe,
 606                         struct pipe_transfer *transfer)
 607 {
 608    assert(transfer->resource);
 609
 610    llvmpipe_resource_unmap(transfer->resource,
 611                            transfer->level,
 612                            transfer->box.z);
 613
 614    /* Effectively do the texture_update work here - if texture images
 615     * needed post-processing to put them into hardware layout, this is
 616     * where it would happen.  For llvmpipe, nothing to do.
 617     */
 618    assert (transfer->resource);
 619    pipe_resource_reference(&transfer->resource, NULL);
 620    FREE(transfer);
 621 }
 622
 623 unsigned int
 624 llvmpipe_is_resource_referenced( struct pipe_context *pipe,
 625                                  struct pipe_resource *presource,
 626                                  unsigned level)
 627 {
 628    struct llvmpipe_context *llvmpipe = llvmpipe_context( pipe );
 629
 630    /*
 631     * XXX checking only resources with the right bind flags
 632     * is unsafe since with opengl state tracker we can end up
 633     * with resources bound to places they weren't supposed to be
 634     * (buffers bound as sampler views is one possibility here).
 635     */
 636    if (!(presource->bind & (PIPE_BIND_DEPTH_STENCIL |
 637                             PIPE_BIND_RENDER_TARGET |
 638                             PIPE_BIND_SAMPLER_VIEW)))
 639       return LP_UNREFERENCED;
 640
 641    return lp_setup_is_resource_referenced(llvmpipe->setup, presource);
 642 }
 643
 644
 645 /**
 646  * Returns the largest possible alignment for a format in llvmpipe
 647  */
 648 unsigned
 649 llvmpipe_get_format_alignment( enum pipe_format format )
 650 {
 651    const struct util_format_description *desc = util_format_description(format);
 652    unsigned size = 0;
 653    unsigned bytes;
 654    unsigned i;
 655
 656    for (i = 0; i < desc->nr_channels; ++i) {
 657       size += desc->channel[i].size;
 658    }
 659
 660    bytes = size / 8;
 661
 662    if (!util_is_power_of_two(bytes)) {
 663       bytes /= desc->nr_channels;
 664    }
 665
 666    if (bytes % 2 || bytes < 1) {
 667       return 1;
 668    } else {
 669       return bytes;
 670    }
 671 }
 672
 673
 674 /**
 675  * Create buffer which wraps user-space data.
 676  */
 677 struct pipe_resource *
 678 llvmpipe_user_buffer_create(struct pipe_screen *screen,
 679                             void *ptr,
 680                             unsigned bytes,
 681                             unsigned bind_flags)
 682 {
 683    struct llvmpipe_resource *buffer;
 684
 685    buffer = CALLOC_STRUCT(llvmpipe_resource);
 686    if(!buffer)
 687       return NULL;
 688
 689    pipe_reference_init(&buffer->base.reference, 1);
 690    buffer->base.screen = screen;
 691    buffer->base.format = PIPE_FORMAT_R8_UNORM; /* ?? */
 692    buffer->base.bind = bind_flags;
 693    buffer->base.usage = PIPE_USAGE_IMMUTABLE;
 694    buffer->base.flags = 0;
 695    buffer->base.width0 = bytes;
 696    buffer->base.height0 = 1;
 697    buffer->base.depth0 = 1;
 698    buffer->base.array_size = 1;
 699    buffer->userBuffer = TRUE;
 700    buffer->data = ptr;
 701
 702    return &buffer->base;
 703 }
 704
 705
 706 /**
 707  * Compute size (in bytes) need to store a texture image / mipmap level,
 708  * for just one cube face, one array layer or one 3D texture slice
 709  */
 710 static unsigned
 711 tex_image_face_size(const struct llvmpipe_resource *lpr, unsigned level)
 712 {
 713    return lpr->img_stride[level];
 714 }
 715
 716
 717 /**
 718  * Return pointer to a 2D texture image/face/slice.
 719  * No tiled/linear conversion is done.
 720  */
 721 ubyte *
 722 llvmpipe_get_texture_image_address(struct llvmpipe_resource *lpr,
 723                                    unsigned face_slice, unsigned level)
 724 {
 725    unsigned offset;
 726
 727    assert(llvmpipe_resource_is_texture(&lpr->base));
 728
 729    offset = lpr->mip_offsets[level];
 730
 731    if (face_slice > 0)
 732       offset += face_slice * tex_image_face_size(lpr, level);
 733
 734    return (ubyte *) lpr->tex_data + offset;
 735 }
 736
 737
 738 /**
 739  * Return size of resource in bytes
 740  */
 741 unsigned
 742 llvmpipe_resource_size(const struct pipe_resource *resource)
 743 {
 744    const struct llvmpipe_resource *lpr = llvmpipe_resource_const(resource);
 745    unsigned size = 0;
 746
 747    if (llvmpipe_resource_is_texture(resource)) {
 748       /* Note this will always return 0 for displaytarget resources */
 749       size = lpr->total_alloc_size;
 750    }
 751    else {
 752       size = resource->width0;
 753    }
 754    return size;
 755 }
 756
 757
 758 #ifdef DEBUG
 759 void
 760 llvmpipe_print_resources(void)
 761 {
 762    struct llvmpipe_resource *lpr;
 763    unsigned n = 0, total = 0;
 764
 765    debug_printf("LLVMPIPE: current resources:\n");
 766    foreach(lpr, &resource_list) {
 767       unsigned size = llvmpipe_resource_size(&lpr->base);
 768       debug_printf("resource %u at %p, size %ux%ux%u: %u bytes, refcount %u\n",
 769                    lpr->id, (void *) lpr,
 770                    lpr->base.width0, lpr->base.height0, lpr->base.depth0,
 771                    size, lpr->base.reference.count);
 772       total += size;
 773       n++;
 774    }
 775    debug_printf("LLVMPIPE: total size of %u resources: %u\n", n, total);
 776 }
 777 #endif
 778
 779
 780 void
 781 llvmpipe_init_screen_resource_funcs(struct pipe_screen *screen)
 782 {
 783 #ifdef DEBUG
 784    /* init linked list for tracking resources */
 785    {
 786       static boolean first_call = TRUE;
 787       if (first_call) {
 788          memset(&resource_list, 0, sizeof(resource_list));
 789          make_empty_list(&resource_list);
 790          first_call = FALSE;
 791       }
 792    }
 793 #endif
 794
 795    screen->resource_create = llvmpipe_resource_create;
 796    screen->resource_destroy = llvmpipe_resource_destroy;
 797    screen->resource_from_handle = llvmpipe_resource_from_handle;
 798    screen->resource_get_handle = llvmpipe_resource_get_handle;
 799    screen->can_create_resource = llvmpipe_can_create_resource;
 800 }
 801
 802
 803 void
 804 llvmpipe_init_context_resource_funcs(struct pipe_context *pipe)
 805 {
 806    pipe->transfer_map = llvmpipe_transfer_map;
 807    pipe->transfer_unmap = llvmpipe_transfer_unmap;
 808
 809    pipe->transfer_flush_region = u_default_transfer_flush_region;
 810    pipe->transfer_inline_write = u_default_transfer_inline_write;
 811 }