src/gallium/drivers/i915/i915_resource_texture.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2006 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   * Authors:
  29   *   Keith Whitwell <keith@tungstengraphics.com>
  30   *   Michel Dänzer <michel@tungstengraphics.com>
  31   */
  32
  33 #include "pipe/p_state.h"
  34 #include "pipe/p_context.h"
  35 #include "pipe/p_defines.h"
  36 #include "util/u_inlines.h"
  37 #include "util/u_format.h"
  38 #include "util/u_math.h"
  39 #include "util/u_memory.h"
  40
  41 #include "i915_context.h"
  42 #include "i915_resource.h"
  43 #include "i915_screen.h"
  44 #include "i915_winsys.h"
  45
  46
  47 /*
  48  * Helper function and arrays
  49  */
  50
  51
  52 /**
  53  * Initial offset for Cube map.
  54  */
  55 static const int initial_offsets[6][2] = {
  56    {0, 0},
  57    {0, 2},
  58    {1, 0},
  59    {1, 2},
  60    {1, 1},
  61    {1, 3}
  62 };
  63
  64 /**
  65  * Step offsets for Cube map.
  66  */
  67 static const int step_offsets[6][2] = {
  68    {0, 2},
  69    {0, 2},
  70    {-1, 2},
  71    {-1, 2},
  72    {-1, 1},
  73    {-1, 1}
  74 };
  75
  76 /* XXX really need twice the size if x is already pot?
  77    Otherwise just use util_next_power_of_two?
  78 */
  79 static unsigned
  80 power_of_two(unsigned x)
  81 {
  82    unsigned value = 1;
  83    while (value < x)
  84       value = value << 1;
  85    return value;
  86 }
  87
  88
  89 /*
  90  * More advanced helper funcs
  91  */
  92
  93
  94 static void
  95 i915_texture_set_level_info(struct i915_texture *tex,
  96                             unsigned level, unsigned nr_images)
  97 {
  98    assert(level < Elements(tex->nr_images));
  99    assert(nr_images);
 100    assert(!tex->image_offset[level]);
 101
 102    tex->nr_images[level] = nr_images;
 103    tex->image_offset[level] = (unsigned *) MALLOC(nr_images * sizeof(unsigned));
 104    tex->image_offset[level][0] = 0;
 105 }
 106
 107 static void
 108 i915_texture_set_image_offset(struct i915_texture *tex,
 109                               unsigned level, unsigned img,
 110                               unsigned x, unsigned y)
 111 {
 112    /* for the first image and level make sure offset is zero */
 113    assert(!(img == 0 && level == 0) || (x == 0 && y == 0));
 114    assert(img < tex->nr_images[level]);
 115
 116    tex->image_offset[level][img] = y * tex->stride + x * util_format_get_blocksize(tex->b.b.format);
 117
 118    /*
 119    printf("%s level %d img %d pos %d,%d image_offset %x\n",
 120        __FUNCTION__, level, img, x, y, tex->image_offset[level][img]);
 121    */
 122 }
 123
 124
 125 /*
 126  * Shared layout functions
 127  */
 128
 129
 130 /**
 131  * Special case to deal with scanout textures.
 132  */
 133 static boolean
 134 i9x5_scanout_layout(struct i915_texture *tex)
 135 {
 136    struct pipe_resource *pt = &tex->b.b;
 137
 138    if (pt->last_level > 0 || util_format_get_blocksize(pt->format) != 4)
 139       return FALSE;
 140
 141    i915_texture_set_level_info(tex, 0, 1);
 142    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 143
 144    if (pt->width0 >= 240) {
 145       tex->stride = power_of_two(util_format_get_stride(pt->format, pt->width0));
 146       tex->total_nblocksy = align(util_format_get_nblocksy(pt->format, pt->height0), 8);
 147       tex->hw_tiled = I915_TILE_X;
 148    } else if (pt->width0 == 64 && pt->height0 == 64) {
 149       tex->stride = power_of_two(util_format_get_stride(pt->format, pt->width0));
 150       tex->total_nblocksy = align(util_format_get_nblocksy(pt->format, pt->height0), 8);
 151    } else {
 152       return FALSE;
 153    }
 154
 155    debug_printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
 156       pt->width0, pt->height0, util_format_get_blocksize(pt->format),
 157       tex->stride, tex->total_nblocksy, tex->stride * tex->total_nblocksy);
 158
 159    return TRUE;
 160 }
 161
 162 /**
 163  * Special case to deal with shared textures.
 164  */
 165 static boolean
 166 i9x5_display_target_layout(struct i915_texture *tex)
 167 {
 168    struct pipe_resource *pt = &tex->b.b;
 169
 170    if (pt->last_level > 0 || util_format_get_blocksize(pt->format) != 4)
 171       return FALSE;
 172
 173    /* fallback to normal textures for small textures */
 174    if (pt->width0 < 240)
 175       return FALSE;
 176
 177    i915_texture_set_level_info(tex, 0, 1);
 178    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 179
 180    tex->stride = power_of_two(util_format_get_stride(pt->format, pt->width0));
 181    tex->total_nblocksy = align(util_format_get_nblocksy(pt->format, pt->height0), 8);
 182    tex->hw_tiled = I915_TILE_X;
 183
 184    debug_printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
 185       pt->width0, pt->height0, util_format_get_blocksize(pt->format),
 186       tex->stride, tex->total_nblocksy, tex->stride * tex->total_nblocksy);
 187
 188    return TRUE;
 189 }
 190
 191
 192 /*
 193  * i915 layout functions
 194  */
 195
 196
 197 static void
 198 i915_texture_layout_2d(struct i915_texture *tex)
 199 {
 200    struct pipe_resource *pt = &tex->b.b;
 201    unsigned level;
 202    unsigned width = pt->width0;
 203    unsigned height = pt->height0;
 204    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 205    unsigned align_y = 2;
 206
 207    /* used for scanouts that need special layouts */
 208    if (pt->bind & PIPE_BIND_SCANOUT)
 209       if (i9x5_scanout_layout(tex))
 210          return;
 211
 212    /* shared buffers needs to be compatible with X servers
 213     *
 214     * XXX: need a better name than shared for this if it is to be part
 215     * of core gallium, and probably move the flag to resource.flags,
 216     * rather than bindings.
 217     */
 218    if (pt->bind & (PIPE_BIND_SHARED | PIPE_BIND_DISPLAY_TARGET))
 219       if (i9x5_display_target_layout(tex))
 220          return;
 221
 222    if (util_format_is_s3tc(pt->format))
 223       align_y = 1;
 224
 225    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 226    tex->total_nblocksy = 0;
 227
 228    for (level = 0; level <= pt->last_level; level++) {
 229       i915_texture_set_level_info(tex, level, 1);
 230       i915_texture_set_image_offset(tex, level, 0, 0, tex->total_nblocksy);
 231
 232       tex->total_nblocksy += nblocksy;
 233
 234       width = u_minify(width, 1);
 235       height = u_minify(height, 1);
 236       nblocksy = align(util_format_get_nblocksy(pt->format, height), align_y);
 237    }
 238 }
 239
 240 static void
 241 i915_texture_layout_3d(struct i915_texture *tex)
 242 {
 243    struct pipe_resource *pt = &tex->b.b;
 244    unsigned level;
 245
 246    unsigned width = pt->width0;
 247    unsigned height = pt->height0;
 248    unsigned depth = pt->depth0;
 249    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 250    unsigned stack_nblocksy = 0;
 251
 252    /* Calculate the size of a single slice.
 253     */
 254    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 255
 256    /* XXX: hardware expects/requires 9 levels at minimum.
 257     */
 258    for (level = 0; level <= MAX2(8, pt->last_level); level++) {
 259       i915_texture_set_level_info(tex, level, depth);
 260
 261       stack_nblocksy += MAX2(2, nblocksy);
 262
 263       width = u_minify(width, 1);
 264       height = u_minify(height, 1);
 265       nblocksy = util_format_get_nblocksy(pt->format, height);
 266    }
 267
 268    /* Fixup depth image_offsets:
 269     */
 270    for (level = 0; level <= pt->last_level; level++) {
 271       unsigned i;
 272       for (i = 0; i < depth; i++)
 273          i915_texture_set_image_offset(tex, level, i, 0, i * stack_nblocksy);
 274
 275       depth = u_minify(depth, 1);
 276    }
 277
 278    /* Multiply slice size by texture depth for total size.  It's
 279     * remarkable how wasteful of memory the i915 texture layouts
 280     * are.  They are largely fixed in the i945.
 281     */
 282    tex->total_nblocksy = stack_nblocksy * pt->depth0;
 283 }
 284
 285 static void
 286 i915_texture_layout_cube(struct i915_texture *tex)
 287 {
 288    struct pipe_resource *pt = &tex->b.b;
 289    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 290    unsigned level;
 291    unsigned face;
 292
 293    assert(pt->width0 == pt->height0); /* cubemap images are square */
 294
 295    /* double pitch for cube layouts */
 296    tex->stride = align(nblocks * util_format_get_blocksize(pt->format) * 2, 4);
 297    tex->total_nblocksy = nblocks * 4;
 298
 299    for (level = 0; level <= pt->last_level; level++)
 300       i915_texture_set_level_info(tex, level, 6);
 301
 302    for (face = 0; face < 6; face++) {
 303       unsigned x = initial_offsets[face][0] * nblocks;
 304       unsigned y = initial_offsets[face][1] * nblocks;
 305       unsigned d = nblocks;
 306
 307       for (level = 0; level <= pt->last_level; level++) {
 308          i915_texture_set_image_offset(tex, level, face, x, y);
 309          d >>= 1;
 310          x += step_offsets[face][0] * d;
 311          y += step_offsets[face][1] * d;
 312       }
 313    }
 314 }
 315
 316 static boolean
 317 i915_texture_layout(struct i915_texture * tex)
 318 {
 319    struct pipe_resource *pt = &tex->b.b;
 320
 321    switch (pt->target) {
 322    case PIPE_TEXTURE_1D:
 323    case PIPE_TEXTURE_2D:
 324       i915_texture_layout_2d(tex);
 325       break;
 326    case PIPE_TEXTURE_3D:
 327       i915_texture_layout_3d(tex);
 328       break;
 329    case PIPE_TEXTURE_CUBE:
 330       i915_texture_layout_cube(tex);
 331       break;
 332    default:
 333       assert(0);
 334       return FALSE;
 335    }
 336
 337    return TRUE;
 338 }
 339
 340
 341 /*
 342  * i945 layout functions
 343  */
 344
 345
 346 static void
 347 i945_texture_layout_2d(struct i915_texture *tex)
 348 {
 349    struct pipe_resource *pt = &tex->b.b;
 350    int align_x = 4, align_y = 2;
 351    unsigned level;
 352    unsigned x = 0;
 353    unsigned y = 0;
 354    unsigned width = pt->width0;
 355    unsigned height = pt->height0;
 356    unsigned nblocksx = util_format_get_nblocksx(pt->format, pt->width0);
 357    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 358
 359    /* used for scanouts that need special layouts */
 360    if (tex->b.b.bind & PIPE_BIND_SCANOUT)
 361       if (i9x5_scanout_layout(tex))
 362          return;
 363
 364    /* shared buffers needs to be compatible with X servers */
 365    if (tex->b.b.bind & (PIPE_BIND_SHARED | PIPE_BIND_DISPLAY_TARGET))
 366       if (i9x5_display_target_layout(tex))
 367          return;
 368
 369    if (util_format_is_s3tc(pt->format)) {
 370       align_x = 1;
 371       align_y = 1;
 372    }
 373
 374    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 375
 376    /* May need to adjust pitch to accomodate the placement of
 377     * the 2nd mipmap level.  This occurs when the alignment
 378     * constraints of mipmap placement push the right edge of the
 379     * 2nd mipmap level out past the width of its parent.
 380     */
 381    if (pt->last_level > 0) {
 382       unsigned mip1_nblocksx =
 383          align(util_format_get_nblocksx(pt->format, u_minify(pt->width0, 1)), align_x) +
 384          util_format_get_nblocksx(pt->format, u_minify(pt->width0, 2));
 385
 386       if (mip1_nblocksx > nblocksx)
 387          tex->stride = mip1_nblocksx * util_format_get_blocksize(pt->format);
 388    }
 389
 390    /* Pitch must be a whole number of dwords
 391     */
 392    tex->stride = align(tex->stride, 64);
 393    tex->total_nblocksy = 0;
 394
 395    for (level = 0; level <= pt->last_level; level++) {
 396       i915_texture_set_level_info(tex, level, 1);
 397       i915_texture_set_image_offset(tex, level, 0, x, y);
 398
 399       /* Because the images are packed better, the final offset
 400        * might not be the maximal one:
 401        */
 402       tex->total_nblocksy = MAX2(tex->total_nblocksy, y + nblocksy);
 403
 404       /* Layout_below: step right after second mipmap level.
 405        */
 406       if (level == 1) {
 407          x += nblocksx;
 408       } else {
 409          y += nblocksy;
 410       }
 411
 412       width  = u_minify(width, 1);
 413       height = u_minify(height, 1);
 414       nblocksx = align(util_format_get_nblocksx(pt->format, width), align_x);
 415       nblocksy = align(util_format_get_nblocksy(pt->format, height), align_y);
 416    }
 417 }
 418
 419 static void
 420 i945_texture_layout_3d(struct i915_texture *tex)
 421 {
 422    struct pipe_resource *pt = &tex->b.b;
 423    unsigned width = pt->width0;
 424    unsigned height = pt->height0;
 425    unsigned depth = pt->depth0;
 426    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 427    unsigned pack_x_pitch, pack_x_nr;
 428    unsigned pack_y_pitch;
 429    unsigned level;
 430
 431    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 432    tex->total_nblocksy = 0;
 433
 434    pack_y_pitch = MAX2(nblocksy, 2);
 435    pack_x_pitch = tex->stride / util_format_get_blocksize(pt->format);
 436    pack_x_nr = 1;
 437
 438    for (level = 0; level <= pt->last_level; level++) {
 439       int x = 0;
 440       int y = 0;
 441       unsigned q, j;
 442
 443       i915_texture_set_level_info(tex, level, depth);
 444
 445       for (q = 0; q < depth;) {
 446          for (j = 0; j < pack_x_nr && q < depth; j++, q++) {
 447             i915_texture_set_image_offset(tex, level, q, x, y + tex->total_nblocksy);
 448             x += pack_x_pitch;
 449          }
 450
 451          x = 0;
 452          y += pack_y_pitch;
 453       }
 454
 455       tex->total_nblocksy += y;
 456
 457       if (pack_x_pitch > 4) {
 458          pack_x_pitch >>= 1;
 459          pack_x_nr <<= 1;
 460          assert(pack_x_pitch * pack_x_nr * util_format_get_blocksize(pt->format) <= tex->stride);
 461       }
 462
 463       if (pack_y_pitch > 2) {
 464          pack_y_pitch >>= 1;
 465       }
 466
 467       width = u_minify(width, 1);
 468       height = u_minify(height, 1);
 469       depth = u_minify(depth, 1);
 470       nblocksy = util_format_get_nblocksy(pt->format, height);
 471    }
 472 }
 473
 474 static void
 475 i945_texture_layout_cube(struct i915_texture *tex)
 476 {
 477    struct pipe_resource *pt = &tex->b.b;
 478    unsigned level;
 479    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 480    unsigned face;
 481
 482    /*
 483    printf("%s %i, %i\n", __FUNCTION__, pt->width0, pt->height0);
 484    */
 485
 486    assert(pt->width0 == pt->height0); /* cubemap images are square */
 487
 488    /*
 489     * XXX Should only be used for compressed formats. But lets
 490     * keep this code active just in case.
 491     *
 492     * Depending on the size of the largest images, pitch can be
 493     * determined either by the old-style packing of cubemap faces,
 494     * or the final row of 4x4, 2x2 and 1x1 faces below this.
 495     */
 496    if (nblocks > 32)
 497       tex->stride = align(nblocks * util_format_get_blocksize(pt->format) * 2, 4);
 498    else
 499       tex->stride = 14 * 8 * util_format_get_blocksize(pt->format);
 500
 501    tex->total_nblocksy = nblocks * 4;
 502
 503    /* Set all the levels to effectively occupy the whole rectangular region.
 504    */
 505    for (level = 0; level <= pt->last_level; level++)
 506       i915_texture_set_level_info(tex, level, 6);
 507
 508    for (face = 0; face < 6; face++) {
 509       unsigned x = initial_offsets[face][0] * nblocks;
 510       unsigned y = initial_offsets[face][1] * nblocks;
 511       unsigned d = nblocks;
 512
 513 #if 0 /* Fix and enable this code for compressed formats */
 514       if (nblocks == 4 && face >= 4) {
 515          y = tex->total_height - 4;
 516          x = (face - 4) * 8;
 517       }
 518       else if (nblocks < 4 && (face > 0)) {
 519          y = tex->total_height - 4;
 520          x = face * 8;
 521       }
 522 #endif
 523
 524       for (level = 0; level <= pt->last_level; level++) {
 525          i915_texture_set_image_offset(tex, level, face, x, y);
 526
 527          d >>= 1;
 528
 529 #if 0 /* Fix and enable this code for compressed formats */
 530          switch (d) {
 531             case 4:
 532                switch (face) {
 533                   case PIPE_TEX_FACE_POS_X:
 534                   case PIPE_TEX_FACE_NEG_X:
 535                      x += step_offsets[face][0] * d;
 536                      y += step_offsets[face][1] * d;
 537                      break;
 538                   case PIPE_TEX_FACE_POS_Y:
 539                   case PIPE_TEX_FACE_NEG_Y:
 540                      y += 12;
 541                      x -= 8;
 542                      break;
 543                   case PIPE_TEX_FACE_POS_Z:
 544                   case PIPE_TEX_FACE_NEG_Z:
 545                      y = tex->total_height - 4;
 546                      x = (face - 4) * 8;
 547                      break;
 548                }
 549             case 2:
 550                y = tex->total_height - 4;
 551                x = 16 + face * 8;
 552                break;
 553
 554             case 1:
 555                x += 48;
 556                break;
 557             default:
 558 #endif
 559                x += step_offsets[face][0] * d;
 560                y += step_offsets[face][1] * d;
 561 #if 0
 562                break;
 563          }
 564 #endif
 565       }
 566    }
 567 }
 568
 569 static boolean
 570 i945_texture_layout(struct i915_texture * tex)
 571 {
 572    struct pipe_resource *pt = &tex->b.b;
 573
 574    switch (pt->target) {
 575    case PIPE_TEXTURE_1D:
 576    case PIPE_TEXTURE_2D:
 577       i945_texture_layout_2d(tex);
 578       break;
 579    case PIPE_TEXTURE_3D:
 580       i945_texture_layout_3d(tex);
 581       break;
 582    case PIPE_TEXTURE_CUBE:
 583       i945_texture_layout_cube(tex);
 584       break;
 585    default:
 586       assert(0);
 587       return FALSE;
 588    }
 589
 590    return TRUE;
 591 }
 592
 593
 594
 595 /*
 596  * Screen texture functions
 597  */
 598
 599
 600
 601 static boolean
 602 i915_texture_get_handle(struct pipe_screen * screen,
 603                         struct pipe_resource *texture,
 604                         struct winsys_handle *whandle)
 605 {
 606    struct i915_screen *is = i915_screen(screen);
 607    struct i915_texture *tex = i915_texture(texture);
 608    struct i915_winsys *iws = is->iws;
 609
 610    return iws->buffer_get_handle(iws, tex->buffer, whandle, tex->stride);
 611 }
 612
 613
 614 static void
 615 i915_texture_destroy(struct pipe_screen *screen,
 616                      struct pipe_resource *pt)
 617 {
 618    struct i915_texture *tex = i915_texture(pt);
 619    struct i915_winsys *iws = i915_screen(screen)->iws;
 620    uint i;
 621
 622    /*
 623      DBG("%s deleting %p\n", __FUNCTION__, (void *) tex);
 624    */
 625
 626    iws->buffer_destroy(iws, tex->buffer);
 627
 628    for (i = 0; i < Elements(tex->image_offset); i++)
 629       if (tex->image_offset[i])
 630          FREE(tex->image_offset[i]);
 631
 632    FREE(tex);
 633 }
 634
 635 static struct pipe_transfer *
 636 i915_texture_get_transfer(struct pipe_context *context,
 637                           struct pipe_resource *resource,
 638                           struct pipe_subresource sr,
 639                           unsigned usage,
 640                           const struct pipe_box *box)
 641 {
 642    struct i915_texture *tex = i915_texture(resource);
 643    struct pipe_transfer *transfer = CALLOC_STRUCT(pipe_transfer);
 644    if (transfer == NULL)
 645       return NULL;
 646
 647    transfer->resource = resource;
 648    transfer->sr = sr;
 649    transfer->usage = usage;
 650    transfer->box = *box;
 651    transfer->stride = tex->stride;
 652
 653    return transfer;
 654 }
 655
 656
 657 static void *
 658 i915_texture_transfer_map(struct pipe_context *pipe,
 659                           struct pipe_transfer *transfer)
 660 {
 661    struct pipe_resource *resource = transfer->resource;
 662    struct i915_texture *tex = i915_texture(resource);
 663    struct i915_winsys *iws = i915_screen(pipe->screen)->iws;
 664    struct pipe_subresource sr = transfer->sr;
 665    struct pipe_box *box = &transfer->box;
 666    enum pipe_format format = resource->format;
 667    unsigned offset;
 668    char *map;
 669
 670    if (resource->target == PIPE_TEXTURE_CUBE) {
 671       offset = tex->image_offset[sr.level][sr.face];
 672    } else if (resource->target == PIPE_TEXTURE_3D) {
 673       offset = tex->image_offset[sr.level][box->z];
 674    } else {
 675       offset = tex->image_offset[sr.level][0];
 676       assert(sr.face == 0);
 677       assert(box->z == 0);
 678    }
 679
 680    map = iws->buffer_map(iws, tex->buffer,
 681                          (transfer->usage & PIPE_TRANSFER_WRITE) ? TRUE : FALSE);
 682    if (map == NULL)
 683       return NULL;
 684
 685    return map + offset +
 686       box->y / util_format_get_blockheight(format) * transfer->stride +
 687       box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 688 }
 689
 690 static void
 691 i915_texture_transfer_unmap(struct pipe_context *pipe,
 692                             struct pipe_transfer *transfer)
 693 {
 694    struct i915_texture *tex = i915_texture(transfer->resource);
 695    struct i915_winsys *iws = i915_screen(tex->b.b.screen)->iws;
 696    iws->buffer_unmap(iws, tex->buffer);
 697 }
 698
 699
 700
 701 struct u_resource_vtbl i915_texture_vtbl =
 702 {
 703    i915_texture_get_handle,           /* get_handle */
 704    i915_texture_destroy,              /* resource_destroy */
 705    NULL,                              /* is_resource_referenced */
 706    i915_texture_get_transfer,         /* get_transfer */
 707    u_default_transfer_destroy,        /* transfer_destroy */
 708    i915_texture_transfer_map,         /* transfer_map */
 709    u_default_transfer_flush_region,   /* transfer_flush_region */
 710    i915_texture_transfer_unmap,       /* transfer_unmap */
 711    u_default_transfer_inline_write    /* transfer_inline_write */
 712 };
 713
 714
 715
 716
 717 struct pipe_resource *
 718 i915_texture_create(struct pipe_screen *screen,
 719                     const struct pipe_resource *template)
 720 {
 721    struct i915_screen *is = i915_screen(screen);
 722    struct i915_winsys *iws = is->iws;
 723    struct i915_texture *tex = CALLOC_STRUCT(i915_texture);
 724    size_t tex_size;
 725    unsigned buf_usage = 0;
 726
 727    if (!tex)
 728       return NULL;
 729
 730    tex->b.b = *template;
 731    tex->b.vtbl = &i915_texture_vtbl;
 732    pipe_reference_init(&tex->b.b.reference, 1);
 733    tex->b.b.screen = screen;
 734
 735    if (is->is_i945) {
 736       if (!i945_texture_layout(tex))
 737          goto fail;
 738    } else {
 739       if (!i915_texture_layout(tex))
 740          goto fail;
 741    }
 742
 743    tex_size = tex->stride * tex->total_nblocksy;
 744
 745    /* for scanouts and cursors, cursors arn't scanouts */
 746
 747    /* XXX: use a custom flag for cursors, don't rely on magically
 748     * guessing that this is Xorg asking for a cursor
 749     */
 750    if ((template->bind & PIPE_BIND_SCANOUT) && template->width0 != 64)
 751       buf_usage = I915_NEW_SCANOUT;
 752    else
 753       buf_usage = I915_NEW_TEXTURE;
 754
 755    tex->buffer = iws->buffer_create(iws, tex_size, 64, buf_usage);
 756    if (!tex->buffer)
 757       goto fail;
 758
 759    /* setup any hw fences */
 760    if (tex->hw_tiled) {
 761       assert(tex->sw_tiled == I915_TILE_NONE);
 762       iws->buffer_set_fence_reg(iws, tex->buffer, tex->stride, tex->hw_tiled);
 763    }
 764
 765
 766 #if 0
 767    void *ptr = ws->buffer_map(ws, tex->buffer,
 768       PIPE_BUFFER_USAGE_CPU_WRITE);
 769    memset(ptr, 0x80, tex_size);
 770    ws->buffer_unmap(ws, tex->buffer);
 771 #endif
 772
 773    return &tex->b.b;
 774
 775 fail:
 776    FREE(tex);
 777    return NULL;
 778 }
 779
 780 struct pipe_resource *
 781 i915_texture_from_handle(struct pipe_screen * screen,
 782                           const struct pipe_resource *template,
 783                           struct winsys_handle *whandle)
 784 {
 785    struct i915_screen *is = i915_screen(screen);
 786    struct i915_texture *tex;
 787    struct i915_winsys *iws = is->iws;
 788    struct i915_winsys_buffer *buffer;
 789    unsigned stride;
 790
 791    assert(screen);
 792
 793    buffer = iws->buffer_from_handle(iws, whandle, &stride);
 794
 795    /* Only supports one type */
 796    if (template->target != PIPE_TEXTURE_2D ||
 797        template->last_level != 0 ||
 798        template->depth0 != 1) {
 799       return NULL;
 800    }
 801
 802    tex = CALLOC_STRUCT(i915_texture);
 803    if (!tex)
 804       return NULL;
 805
 806    tex->b.b = *template;
 807    tex->b.vtbl = &i915_texture_vtbl;
 808    pipe_reference_init(&tex->b.b.reference, 1);
 809    tex->b.b.screen = screen;
 810
 811    tex->stride = stride;
 812
 813    i915_texture_set_level_info(tex, 0, 1);
 814    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 815
 816    tex->buffer = buffer;
 817
 818    return &tex->b.b;
 819 }
 820