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 #include "i915_debug.h"
  46
  47
  48 #define DEBUG_TEXTURES 0
  49
  50 /*
  51  * Helper function and arrays
  52  */
  53
  54
  55 /**
  56  * Initial offset for Cube map.
  57  */
  58 static const int initial_offsets[6][2] = {
  59    [PIPE_TEX_FACE_POS_X] = {0, 0},
  60    [PIPE_TEX_FACE_POS_Y] = {1, 0},
  61    [PIPE_TEX_FACE_POS_Z] = {1, 1},
  62    [PIPE_TEX_FACE_NEG_X] = {0, 2},
  63    [PIPE_TEX_FACE_NEG_Y] = {1, 2},
  64    [PIPE_TEX_FACE_NEG_Z] = {1, 3},
  65 };
  66
  67 /**
  68  * Step offsets for Cube map.
  69  */
  70 static const int step_offsets[6][2] = {
  71    [PIPE_TEX_FACE_POS_X] = { 0, 2},
  72    [PIPE_TEX_FACE_POS_Y] = {-1, 2},
  73    [PIPE_TEX_FACE_POS_Z] = {-1, 1},
  74    [PIPE_TEX_FACE_NEG_X] = { 0, 2},
  75    [PIPE_TEX_FACE_NEG_Y] = {-1, 2},
  76    [PIPE_TEX_FACE_NEG_Z] = {-1, 1},
  77 };
  78
  79 /**
  80  * For compressed level 2
  81  */
  82 static const int bottom_offsets[6] = {
  83    [PIPE_TEX_FACE_POS_X] = 16 + 0 * 8,
  84    [PIPE_TEX_FACE_POS_Y] = 16 + 1 * 8,
  85    [PIPE_TEX_FACE_POS_Z] = 16 + 2 * 8,
  86    [PIPE_TEX_FACE_NEG_X] = 16 + 3 * 8,
  87    [PIPE_TEX_FACE_NEG_Y] = 16 + 4 * 8,
  88    [PIPE_TEX_FACE_NEG_Z] = 16 + 5 * 8,
  89 };
  90
  91 static INLINE unsigned
  92 align_nblocksx(enum pipe_format format, unsigned width, unsigned align_to)
  93 {
  94    return align(util_format_get_nblocksx(format, width), align_to);
  95 }
  96
  97 static INLINE unsigned
  98 align_nblocksy(enum pipe_format format, unsigned width, unsigned align_to)
  99 {
 100    return align(util_format_get_nblocksy(format, width), align_to);
 101 }
 102
 103 static INLINE unsigned
 104 get_pot_stride(enum pipe_format format, unsigned width)
 105 {
 106    return util_next_power_of_two(util_format_get_stride(format, width));
 107 }
 108
 109 static INLINE const char*
 110 get_tiling_string(enum i915_winsys_buffer_tile tile)
 111 {
 112    switch(tile) {
 113    case I915_TILE_NONE:
 114       return "none";
 115    case I915_TILE_X:
 116       return "x";
 117    case I915_TILE_Y:
 118       return "y";
 119    default:
 120       assert(FALSE);
 121       return "?";
 122    }
 123 }
 124
 125
 126 /*
 127  * More advanced helper funcs
 128  */
 129
 130
 131 static void
 132 i915_texture_set_level_info(struct i915_texture *tex,
 133                             unsigned level, unsigned nr_images)
 134 {
 135    assert(level < Elements(tex->nr_images));
 136    assert(nr_images);
 137    assert(!tex->image_offset[level]);
 138
 139    tex->nr_images[level] = nr_images;
 140    tex->image_offset[level] = MALLOC(nr_images * sizeof(struct offset_pair));
 141    tex->image_offset[level][0].nblocksx = 0;
 142    tex->image_offset[level][0].nblocksy = 0;
 143 }
 144
 145 INLINE unsigned i915_texture_offset(struct i915_texture *tex,
 146                                     unsigned level, unsigned layer)
 147 {
 148    unsigned x, y;
 149    x = tex->image_offset[level][layer].nblocksx
 150       * util_format_get_blocksize(tex->b.b.format);
 151    y = tex->image_offset[level][layer].nblocksy;
 152
 153    return y * tex->stride + x;
 154 }
 155
 156 static void
 157 i915_texture_set_image_offset(struct i915_texture *tex,
 158                               unsigned level, unsigned img,
 159                               unsigned nblocksx, unsigned nblocksy)
 160 {
 161    /* for the first image and level make sure offset is zero */
 162    assert(!(img == 0 && level == 0) || (nblocksx == 0 && nblocksy == 0));
 163    assert(img < tex->nr_images[level]);
 164
 165    tex->image_offset[level][img].nblocksx = nblocksx;
 166    tex->image_offset[level][img].nblocksy = nblocksy;
 167
 168 #if DEBUG_TEXTURES
 169    debug_printf("%s: %p level %u, img %u (%u, %u)\n", __FUNCTION__,
 170                 tex, level, img, x, y);
 171 #endif
 172 }
 173
 174 static enum i915_winsys_buffer_tile
 175 i915_texture_tiling(struct pipe_resource *pt)
 176 {
 177    if (!i915_tiling)
 178       return I915_TILE_NONE;
 179
 180    if (pt->target == PIPE_TEXTURE_1D)
 181       return I915_TILE_NONE;
 182
 183    if (util_format_is_s3tc(pt->format))
 184       /* XXX X-tiling might make sense */
 185       return I915_TILE_NONE;
 186
 187    return I915_TILE_X;
 188 }
 189
 190
 191 /*
 192  * Shared layout functions
 193  */
 194
 195
 196 /**
 197  * Special case to deal with scanout textures.
 198  */
 199 static boolean
 200 i9x5_scanout_layout(struct i915_texture *tex)
 201 {
 202    struct pipe_resource *pt = &tex->b.b;
 203
 204    if (pt->last_level > 0 || util_format_get_blocksize(pt->format) != 4)
 205       return FALSE;
 206
 207    i915_texture_set_level_info(tex, 0, 1);
 208    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 209
 210    if (pt->width0 >= 240) {
 211       tex->stride = align(util_format_get_stride(pt->format, pt->width0), 64);
 212       tex->total_nblocksy = align_nblocksy(pt->format, pt->height0, 8);
 213       tex->tiling = I915_TILE_X;
 214    /* special case for cursors */
 215    } else if (pt->width0 == 64 && pt->height0 == 64) {
 216       tex->stride = get_pot_stride(pt->format, pt->width0);
 217       tex->total_nblocksy = align_nblocksy(pt->format, pt->height0, 8);
 218    } else {
 219       return FALSE;
 220    }
 221
 222 #if DEBUG_TEXTURE
 223    debug_printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
 224       pt->width0, pt->height0, util_format_get_blocksize(pt->format),
 225       tex->stride, tex->total_nblocksy, tex->stride * tex->total_nblocksy);
 226 #endif
 227
 228    return TRUE;
 229 }
 230
 231 /**
 232  * Special case to deal with shared textures.
 233  */
 234 static boolean
 235 i9x5_display_target_layout(struct i915_texture *tex)
 236 {
 237    struct pipe_resource *pt = &tex->b.b;
 238
 239    if (pt->last_level > 0 || util_format_get_blocksize(pt->format) != 4)
 240       return FALSE;
 241
 242    /* fallback to normal textures for small textures */
 243    if (pt->width0 < 240)
 244       return FALSE;
 245
 246    i915_texture_set_level_info(tex, 0, 1);
 247    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 248
 249    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 64);
 250    tex->total_nblocksy = align_nblocksy(pt->format, pt->height0, 8);
 251    tex->tiling = I915_TILE_X;
 252
 253 #if DEBUG_TEXTURE
 254    debug_printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
 255       pt->width0, pt->height0, util_format_get_blocksize(pt->format),
 256       tex->stride, tex->total_nblocksy, tex->stride * tex->total_nblocksy);
 257 #endif
 258
 259    return TRUE;
 260 }
 261
 262 /**
 263  * Helper function for special layouts
 264  */
 265 static boolean
 266 i9x5_special_layout(struct i915_texture *tex)
 267 {
 268    struct pipe_resource *pt = &tex->b.b;
 269
 270    /* Scanouts needs special care */
 271    if (pt->bind & PIPE_BIND_SCANOUT)
 272       if (i9x5_scanout_layout(tex))
 273          return TRUE;
 274
 275    /* Shared buffers needs to be compatible with X servers
 276     *
 277     * XXX: need a better name than shared for this if it is to be part
 278     * of core gallium, and probably move the flag to resource.flags,
 279     * rather than bindings.
 280     */
 281    if (pt->bind & (PIPE_BIND_SHARED | PIPE_BIND_DISPLAY_TARGET))
 282       if (i9x5_display_target_layout(tex))
 283          return TRUE;
 284
 285    return FALSE;
 286 }
 287
 288 /**
 289  * Cube layout used on i915 and for non-compressed textures on i945.
 290  */
 291 static void
 292 i9x5_texture_layout_cube(struct i915_texture *tex)
 293 {
 294    struct pipe_resource *pt = &tex->b.b;
 295    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 296    unsigned level;
 297    unsigned face;
 298
 299    assert(pt->width0 == pt->height0); /* cubemap images are square */
 300
 301    /* double pitch for cube layouts */
 302    tex->stride = align(nblocks * util_format_get_blocksize(pt->format) * 2, 4);
 303    tex->total_nblocksy = nblocks * 4;
 304
 305    for (level = 0; level <= pt->last_level; level++)
 306       i915_texture_set_level_info(tex, level, 6);
 307
 308    for (face = 0; face < 6; face++) {
 309       unsigned x = initial_offsets[face][0] * nblocks;
 310       unsigned y = initial_offsets[face][1] * nblocks;
 311       unsigned d = nblocks;
 312
 313       for (level = 0; level <= pt->last_level; level++) {
 314          i915_texture_set_image_offset(tex, level, face, x, y);
 315          d >>= 1;
 316          x += step_offsets[face][0] * d;
 317          y += step_offsets[face][1] * d;
 318       }
 319    }
 320 }
 321
 322
 323 /*
 324  * i915 layout functions
 325  */
 326
 327
 328 static void
 329 i915_texture_layout_2d(struct i915_texture *tex)
 330 {
 331    struct pipe_resource *pt = &tex->b.b;
 332    unsigned level;
 333    unsigned width = pt->width0;
 334    unsigned height = pt->height0;
 335    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 336    unsigned align_y = 2;
 337
 338    if (util_format_is_s3tc(pt->format))
 339       align_y = 1;
 340
 341    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 342    tex->total_nblocksy = 0;
 343
 344    for (level = 0; level <= pt->last_level; level++) {
 345       i915_texture_set_level_info(tex, level, 1);
 346       i915_texture_set_image_offset(tex, level, 0, 0, tex->total_nblocksy);
 347
 348       tex->total_nblocksy += nblocksy;
 349
 350       width = u_minify(width, 1);
 351       height = u_minify(height, 1);
 352       nblocksy = align_nblocksy(pt->format, height, align_y);
 353    }
 354 }
 355
 356 static void
 357 i915_texture_layout_3d(struct i915_texture *tex)
 358 {
 359    struct pipe_resource *pt = &tex->b.b;
 360    unsigned level;
 361
 362    unsigned width = pt->width0;
 363    unsigned height = pt->height0;
 364    unsigned depth = pt->depth0;
 365    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 366    unsigned stack_nblocksy = 0;
 367
 368    /* Calculate the size of a single slice.
 369     */
 370    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 371
 372    /* XXX: hardware expects/requires 9 levels at minimum.
 373     */
 374    for (level = 0; level <= MAX2(8, pt->last_level); level++) {
 375       i915_texture_set_level_info(tex, level, depth);
 376
 377       stack_nblocksy += MAX2(2, nblocksy);
 378
 379       width = u_minify(width, 1);
 380       height = u_minify(height, 1);
 381       nblocksy = util_format_get_nblocksy(pt->format, height);
 382    }
 383
 384    /* Fixup depth image_offsets:
 385     */
 386    for (level = 0; level <= pt->last_level; level++) {
 387       unsigned i;
 388       for (i = 0; i < depth; i++)
 389          i915_texture_set_image_offset(tex, level, i, 0, i * stack_nblocksy);
 390
 391       depth = u_minify(depth, 1);
 392    }
 393
 394    /* Multiply slice size by texture depth for total size.  It's
 395     * remarkable how wasteful of memory the i915 texture layouts
 396     * are.  They are largely fixed in the i945.
 397     */
 398    tex->total_nblocksy = stack_nblocksy * pt->depth0;
 399 }
 400
 401 static boolean
 402 i915_texture_layout(struct i915_texture * tex)
 403 {
 404    struct pipe_resource *pt = &tex->b.b;
 405
 406    tex->tiling = i915_texture_tiling(pt);
 407
 408    switch (pt->target) {
 409    case PIPE_TEXTURE_1D:
 410    case PIPE_TEXTURE_2D:
 411    case PIPE_TEXTURE_RECT:
 412       if (!i9x5_special_layout(tex))
 413          i915_texture_layout_2d(tex);
 414       break;
 415    case PIPE_TEXTURE_3D:
 416       i915_texture_layout_3d(tex);
 417       break;
 418    case PIPE_TEXTURE_CUBE:
 419       i9x5_texture_layout_cube(tex);
 420       break;
 421    default:
 422       assert(0);
 423       return FALSE;
 424    }
 425
 426    return TRUE;
 427 }
 428
 429
 430 /*
 431  * i945 layout functions
 432  */
 433
 434
 435 static void
 436 i945_texture_layout_2d(struct i915_texture *tex)
 437 {
 438    struct pipe_resource *pt = &tex->b.b;
 439    int align_x = 4, align_y = 2;
 440    unsigned level;
 441    unsigned x = 0;
 442    unsigned y = 0;
 443    unsigned width = pt->width0;
 444    unsigned height = pt->height0;
 445    unsigned nblocksx = util_format_get_nblocksx(pt->format, pt->width0);
 446    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 447
 448    if (util_format_is_s3tc(pt->format)) {
 449       align_x = 1;
 450       align_y = 1;
 451    }
 452
 453    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 454
 455    /* May need to adjust pitch to accomodate the placement of
 456     * the 2nd mipmap level.  This occurs when the alignment
 457     * constraints of mipmap placement push the right edge of the
 458     * 2nd mipmap level out past the width of its parent.
 459     */
 460    if (pt->last_level > 0) {
 461       unsigned mip1_nblocksx =
 462          align_nblocksx(pt->format, u_minify(pt->width0, 1), align_x) +
 463          util_format_get_nblocksx(pt->format, u_minify(pt->width0, 2));
 464
 465       if (mip1_nblocksx > nblocksx)
 466          tex->stride = mip1_nblocksx * util_format_get_blocksize(pt->format);
 467    }
 468
 469    /* Pitch must be a whole number of dwords
 470     */
 471    tex->stride = align(tex->stride, 64);
 472    tex->total_nblocksy = 0;
 473
 474    for (level = 0; level <= pt->last_level; level++) {
 475       i915_texture_set_level_info(tex, level, 1);
 476       i915_texture_set_image_offset(tex, level, 0, x, y);
 477
 478       /* Because the images are packed better, the final offset
 479        * might not be the maximal one:
 480        */
 481       tex->total_nblocksy = MAX2(tex->total_nblocksy, y + nblocksy);
 482
 483       /* Layout_below: step right after second mipmap level.
 484        */
 485       if (level == 1) {
 486          x += nblocksx;
 487       } else {
 488          y += nblocksy;
 489       }
 490
 491       width  = u_minify(width, 1);
 492       height = u_minify(height, 1);
 493       nblocksx = align_nblocksx(pt->format, width, align_x);
 494       nblocksy = align_nblocksy(pt->format, height, align_y);
 495    }
 496 }
 497
 498 static void
 499 i945_texture_layout_3d(struct i915_texture *tex)
 500 {
 501    struct pipe_resource *pt = &tex->b.b;
 502    unsigned width = pt->width0;
 503    unsigned height = pt->height0;
 504    unsigned depth = pt->depth0;
 505    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 506    unsigned pack_x_pitch, pack_x_nr;
 507    unsigned pack_y_pitch;
 508    unsigned level;
 509
 510    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 511    tex->total_nblocksy = 0;
 512
 513    pack_y_pitch = MAX2(nblocksy, 2);
 514    pack_x_pitch = tex->stride / util_format_get_blocksize(pt->format);
 515    pack_x_nr = 1;
 516
 517    for (level = 0; level <= pt->last_level; level++) {
 518       int x = 0;
 519       int y = 0;
 520       unsigned q, j;
 521
 522       i915_texture_set_level_info(tex, level, depth);
 523
 524       for (q = 0; q < depth;) {
 525          for (j = 0; j < pack_x_nr && q < depth; j++, q++) {
 526             i915_texture_set_image_offset(tex, level, q, x, y + tex->total_nblocksy);
 527             x += pack_x_pitch;
 528          }
 529
 530          x = 0;
 531          y += pack_y_pitch;
 532       }
 533
 534       tex->total_nblocksy += y;
 535
 536       if (pack_x_pitch > 4) {
 537          pack_x_pitch >>= 1;
 538          pack_x_nr <<= 1;
 539          assert(pack_x_pitch * pack_x_nr * util_format_get_blocksize(pt->format) <= tex->stride);
 540       }
 541
 542       if (pack_y_pitch > 2) {
 543          pack_y_pitch >>= 1;
 544       }
 545
 546       width = u_minify(width, 1);
 547       height = u_minify(height, 1);
 548       depth = u_minify(depth, 1);
 549       nblocksy = util_format_get_nblocksy(pt->format, height);
 550    }
 551 }
 552
 553 static void
 554 i945_texture_layout_cube(struct i915_texture *tex)
 555 {
 556    struct pipe_resource *pt = &tex->b.b;
 557    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 558    const unsigned dim = pt->width0;
 559    unsigned level;
 560    unsigned face;
 561
 562    assert(pt->width0 == pt->height0); /* cubemap images are square */
 563    assert(util_next_power_of_two(pt->width0) == pt->width0); /* npot only */
 564    assert(util_format_is_s3tc(pt->format)); /* compressed only */
 565
 566    /*
 567     * Depending on the size of the largest images, pitch can be
 568     * determined either by the old-style packing of cubemap faces,
 569     * or the final row of 4x4, 2x2 and 1x1 faces below this.
 570     *
 571     * 64  * 2 / 4 = 32
 572     * 14 * 2 = 28
 573     */
 574    if (pt->width0 >= 64)
 575       tex->stride = nblocks * 2 * util_format_get_blocksize(pt->format);
 576    else
 577       tex->stride = 14 * 2 * util_format_get_blocksize(pt->format);
 578
 579    /*
 580     * Something similary apply for height as well.
 581     */
 582    if (pt->width0 >= 4)
 583       tex->total_nblocksy = nblocks * 4 + 1;
 584    else
 585       tex->total_nblocksy = 1;
 586
 587    /* Set all the levels to effectively occupy the whole rectangular region */
 588    for (level = 0; level <= pt->last_level; level++)
 589       i915_texture_set_level_info(tex, level, 6);
 590
 591    for (face = 0; face < 6; face++) {
 592       /* all calculations in pixels */
 593       unsigned total_height = tex->total_nblocksy * 4;
 594       unsigned x = initial_offsets[face][0] * dim;
 595       unsigned y = initial_offsets[face][1] * dim;
 596       unsigned d = dim;
 597
 598       if (dim == 4 && face >= 4) {
 599          x = (face - 4) * 8;
 600          y = tex->total_nblocksy * 4 - 4; /* 4 = 1 block */
 601       } else if (dim < 4 && (face > 0)) {
 602          x = face * 8;
 603          y = total_height - 4;
 604       }
 605
 606       for (level = 0; level <= pt->last_level; level++) {
 607          i915_texture_set_image_offset(tex, level, face,
 608                                        util_format_get_nblocksx(pt->format, x),
 609                                        util_format_get_nblocksy(pt->format, y));
 610
 611          d >>= 1;
 612
 613          switch (d) {
 614          case 4:
 615             switch (face) {
 616             case PIPE_TEX_FACE_POS_X:
 617             case PIPE_TEX_FACE_NEG_X:
 618                x += step_offsets[face][0] * d;
 619                y += step_offsets[face][1] * d;
 620                break;
 621             case PIPE_TEX_FACE_POS_Y:
 622             case PIPE_TEX_FACE_NEG_Y:
 623                y += 12;
 624                x -= 8;
 625                break;
 626             case PIPE_TEX_FACE_POS_Z:
 627             case PIPE_TEX_FACE_NEG_Z:
 628                y = total_height - 4;
 629                x = (face - 4) * 8;
 630                break;
 631             }
 632             break;
 633          case 2:
 634             y = total_height - 4;
 635             x = bottom_offsets[face];
 636             break;
 637          case 1:
 638             x += 48;
 639             break;
 640          default:
 641             x += step_offsets[face][0] * d;
 642             y += step_offsets[face][1] * d;
 643             break;
 644          }
 645       }
 646    }
 647 }
 648
 649 static boolean
 650 i945_texture_layout(struct i915_texture * tex)
 651 {
 652    struct pipe_resource *pt = &tex->b.b;
 653
 654    tex->tiling = i915_texture_tiling(pt);
 655
 656    switch (pt->target) {
 657    case PIPE_TEXTURE_1D:
 658    case PIPE_TEXTURE_2D:
 659    case PIPE_TEXTURE_RECT:
 660       if (!i9x5_special_layout(tex))
 661          i945_texture_layout_2d(tex);
 662       break;
 663    case PIPE_TEXTURE_3D:
 664       i945_texture_layout_3d(tex);
 665       break;
 666    case PIPE_TEXTURE_CUBE:
 667       if (!util_format_is_s3tc(pt->format))
 668          i9x5_texture_layout_cube(tex);
 669       else
 670          i945_texture_layout_cube(tex);
 671       break;
 672    default:
 673       assert(0);
 674       return FALSE;
 675    }
 676
 677    return TRUE;
 678 }
 679
 680
 681
 682 /*
 683  * Screen texture functions
 684  */
 685
 686
 687
 688 static boolean
 689 i915_texture_get_handle(struct pipe_screen * screen,
 690                         struct pipe_resource *texture,
 691                         struct winsys_handle *whandle)
 692 {
 693    struct i915_screen *is = i915_screen(screen);
 694    struct i915_texture *tex = i915_texture(texture);
 695    struct i915_winsys *iws = is->iws;
 696
 697    return iws->buffer_get_handle(iws, tex->buffer, whandle, tex->stride);
 698 }
 699
 700
 701 static void
 702 i915_texture_destroy(struct pipe_screen *screen,
 703                      struct pipe_resource *pt)
 704 {
 705    struct i915_texture *tex = i915_texture(pt);
 706    struct i915_winsys *iws = i915_screen(screen)->iws;
 707    uint i;
 708
 709    iws->buffer_destroy(iws, tex->buffer);
 710
 711    for (i = 0; i < Elements(tex->image_offset); i++)
 712       if (tex->image_offset[i])
 713          FREE(tex->image_offset[i]);
 714
 715    FREE(tex);
 716 }
 717
 718 static struct pipe_transfer *
 719 i915_texture_get_transfer(struct pipe_context *pipe,
 720                           struct pipe_resource *resource,
 721                           unsigned level,
 722                           unsigned usage,
 723                           const struct pipe_box *box)
 724 {
 725    struct i915_context *i915 = i915_context(pipe);
 726    struct i915_texture *tex = i915_texture(resource);
 727    struct pipe_transfer *transfer = util_slab_alloc(&i915->transfer_pool);
 728
 729    if (transfer == NULL)
 730       return NULL;
 731
 732    transfer->resource = resource;
 733    transfer->level = level;
 734    transfer->usage = usage;
 735    transfer->box = *box;
 736    transfer->stride = tex->stride;
 737    /* FIXME: layer_stride */
 738
 739    return transfer;
 740 }
 741
 742 static void
 743 i915_transfer_destroy(struct pipe_context *pipe,
 744                       struct pipe_transfer *transfer)
 745 {
 746    struct i915_context *i915 = i915_context(pipe);
 747    util_slab_free(&i915->transfer_pool, transfer);
 748 }
 749
 750 static void *
 751 i915_texture_transfer_map(struct pipe_context *pipe,
 752                           struct pipe_transfer *transfer)
 753 {
 754    struct pipe_resource *resource = transfer->resource;
 755    struct i915_texture *tex = i915_texture(resource);
 756    struct i915_winsys *iws = i915_screen(pipe->screen)->iws;
 757    struct pipe_box *box = &transfer->box;
 758    enum pipe_format format = resource->format;
 759    unsigned offset;
 760    char *map;
 761
 762    if (resource->target != PIPE_TEXTURE_3D &&
 763        resource->target != PIPE_TEXTURE_CUBE)
 764       assert(box->z == 0);
 765    offset = i915_texture_offset(tex, transfer->level, box->z);
 766
 767    map = iws->buffer_map(iws, tex->buffer,
 768                          (transfer->usage & PIPE_TRANSFER_WRITE) ? TRUE : FALSE);
 769    if (map == NULL)
 770       return NULL;
 771
 772    return map + offset +
 773       box->y / util_format_get_blockheight(format) * transfer->stride +
 774       box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 775 }
 776
 777 static void
 778 i915_texture_transfer_unmap(struct pipe_context *pipe,
 779                             struct pipe_transfer *transfer)
 780 {
 781    struct i915_texture *tex = i915_texture(transfer->resource);
 782    struct i915_winsys *iws = i915_screen(tex->b.b.screen)->iws;
 783    iws->buffer_unmap(iws, tex->buffer);
 784 }
 785
 786
 787
 788 struct u_resource_vtbl i915_texture_vtbl =
 789 {
 790    i915_texture_get_handle,           /* get_handle */
 791    i915_texture_destroy,              /* resource_destroy */
 792    NULL,                              /* is_resource_referenced */
 793    i915_texture_get_transfer,         /* get_transfer */
 794    i915_transfer_destroy,             /* transfer_destroy */
 795    i915_texture_transfer_map,         /* transfer_map */
 796    u_default_transfer_flush_region,   /* transfer_flush_region */
 797    i915_texture_transfer_unmap,       /* transfer_unmap */
 798    u_default_transfer_inline_write    /* transfer_inline_write */
 799 };
 800
 801
 802
 803
 804 struct pipe_resource *
 805 i915_texture_create(struct pipe_screen *screen,
 806                     const struct pipe_resource *template)
 807 {
 808    struct i915_screen *is = i915_screen(screen);
 809    struct i915_winsys *iws = is->iws;
 810    struct i915_texture *tex = CALLOC_STRUCT(i915_texture);
 811    unsigned buf_usage = 0;
 812
 813    if (!tex)
 814       return NULL;
 815
 816    tex->b.b = *template;
 817    tex->b.vtbl = &i915_texture_vtbl;
 818    pipe_reference_init(&tex->b.b.reference, 1);
 819    tex->b.b.screen = screen;
 820
 821    if (is->is_i945) {
 822       if (!i945_texture_layout(tex))
 823          goto fail;
 824    } else {
 825       if (!i915_texture_layout(tex))
 826          goto fail;
 827    }
 828
 829    /* for scanouts and cursors, cursors arn't scanouts */
 830
 831    /* XXX: use a custom flag for cursors, don't rely on magically
 832     * guessing that this is Xorg asking for a cursor
 833     */
 834    if ((template->bind & PIPE_BIND_SCANOUT) && template->width0 != 64)
 835       buf_usage = I915_NEW_SCANOUT;
 836    else
 837       buf_usage = I915_NEW_TEXTURE;
 838
 839    tex->buffer = iws->buffer_create_tiled(iws, &tex->stride, tex->total_nblocksy,
 840                                           &tex->tiling, buf_usage);
 841    if (!tex->buffer)
 842       goto fail;
 843
 844    I915_DBG(DBG_TEXTURE, "%s: %p stride %u, blocks (%u, %u) tiling %s\n", __func__,
 845             tex, tex->stride,
 846             tex->stride / util_format_get_blocksize(tex->b.b.format),
 847             tex->total_nblocksy, get_tiling_string(tex->tiling));
 848
 849    return &tex->b.b;
 850
 851 fail:
 852    FREE(tex);
 853    return NULL;
 854 }
 855
 856 struct pipe_resource *
 857 i915_texture_from_handle(struct pipe_screen * screen,
 858                           const struct pipe_resource *template,
 859                           struct winsys_handle *whandle)
 860 {
 861    struct i915_screen *is = i915_screen(screen);
 862    struct i915_texture *tex;
 863    struct i915_winsys *iws = is->iws;
 864    struct i915_winsys_buffer *buffer;
 865    unsigned stride;
 866    enum i915_winsys_buffer_tile tiling;
 867
 868    assert(screen);
 869
 870    buffer = iws->buffer_from_handle(iws, whandle, &tiling, &stride);
 871
 872    /* Only supports one type */
 873    if ((template->target != PIPE_TEXTURE_2D &&
 874        template->target != PIPE_TEXTURE_RECT) ||
 875        template->last_level != 0 ||
 876        template->depth0 != 1) {
 877       return NULL;
 878    }
 879
 880    tex = CALLOC_STRUCT(i915_texture);
 881    if (!tex)
 882       return NULL;
 883
 884    tex->b.b = *template;
 885    tex->b.vtbl = &i915_texture_vtbl;
 886    pipe_reference_init(&tex->b.b.reference, 1);
 887    tex->b.b.screen = screen;
 888
 889    tex->stride = stride;
 890    tex->tiling = tiling;
 891    tex->total_nblocksy = align_nblocksy(tex->b.b.format, tex->b.b.height0, 8);
 892
 893    i915_texture_set_level_info(tex, 0, 1);
 894    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 895
 896    tex->buffer = buffer;
 897
 898    I915_DBG(DBG_TEXTURE, "%s: %p stride %u, blocks (%u, %u) tiling %s\n", __func__,
 899             tex, tex->stride,
 900             tex->stride / util_format_get_blocksize(tex->b.b.format),
 901             tex->total_nblocksy, get_tiling_string(tex->tiling));
 902
 903    return &tex->b.b;
 904 }
 905