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 i915_screen *is, struct i915_texture *tex)
 176 {
 177    if (!is->debug.tiling)
 178       return I915_TILE_NONE;
 179
 180    if (tex->b.b.target == PIPE_TEXTURE_1D)
 181       return I915_TILE_NONE;
 182
 183    if (util_format_is_s3tc(tex->b.b.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    switch (tex->b.b.target) {
 405    case PIPE_TEXTURE_1D:
 406    case PIPE_TEXTURE_2D:
 407    case PIPE_TEXTURE_RECT:
 408       if (!i9x5_special_layout(tex))
 409          i915_texture_layout_2d(tex);
 410       break;
 411    case PIPE_TEXTURE_3D:
 412       i915_texture_layout_3d(tex);
 413       break;
 414    case PIPE_TEXTURE_CUBE:
 415       i9x5_texture_layout_cube(tex);
 416       break;
 417    default:
 418       assert(0);
 419       return FALSE;
 420    }
 421
 422    return TRUE;
 423 }
 424
 425
 426 /*
 427  * i945 layout functions
 428  */
 429
 430
 431 static void
 432 i945_texture_layout_2d(struct i915_texture *tex)
 433 {
 434    struct pipe_resource *pt = &tex->b.b;
 435    int align_x = 4, align_y = 2;
 436    unsigned level;
 437    unsigned x = 0;
 438    unsigned y = 0;
 439    unsigned width = pt->width0;
 440    unsigned height = pt->height0;
 441    unsigned nblocksx = util_format_get_nblocksx(pt->format, pt->width0);
 442    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 443
 444    if (util_format_is_s3tc(pt->format)) {
 445       align_x = 1;
 446       align_y = 1;
 447    }
 448
 449    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 450
 451    /* May need to adjust pitch to accomodate the placement of
 452     * the 2nd mipmap level.  This occurs when the alignment
 453     * constraints of mipmap placement push the right edge of the
 454     * 2nd mipmap level out past the width of its parent.
 455     */
 456    if (pt->last_level > 0) {
 457       unsigned mip1_nblocksx =
 458          align_nblocksx(pt->format, u_minify(pt->width0, 1), align_x) +
 459          util_format_get_nblocksx(pt->format, u_minify(pt->width0, 2));
 460
 461       if (mip1_nblocksx > nblocksx)
 462          tex->stride = mip1_nblocksx * util_format_get_blocksize(pt->format);
 463    }
 464
 465    /* Pitch must be a whole number of dwords
 466     */
 467    tex->stride = align(tex->stride, 64);
 468    tex->total_nblocksy = 0;
 469
 470    for (level = 0; level <= pt->last_level; level++) {
 471       i915_texture_set_level_info(tex, level, 1);
 472       i915_texture_set_image_offset(tex, level, 0, x, y);
 473
 474       /* Because the images are packed better, the final offset
 475        * might not be the maximal one:
 476        */
 477       tex->total_nblocksy = MAX2(tex->total_nblocksy, y + nblocksy);
 478
 479       /* Layout_below: step right after second mipmap level.
 480        */
 481       if (level == 1) {
 482          x += nblocksx;
 483       } else {
 484          y += nblocksy;
 485       }
 486
 487       width  = u_minify(width, 1);
 488       height = u_minify(height, 1);
 489       nblocksx = align_nblocksx(pt->format, width, align_x);
 490       nblocksy = align_nblocksy(pt->format, height, align_y);
 491    }
 492 }
 493
 494 static void
 495 i945_texture_layout_3d(struct i915_texture *tex)
 496 {
 497    struct pipe_resource *pt = &tex->b.b;
 498    unsigned width = pt->width0;
 499    unsigned height = pt->height0;
 500    unsigned depth = pt->depth0;
 501    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 502    unsigned pack_x_pitch, pack_x_nr;
 503    unsigned pack_y_pitch;
 504    unsigned level;
 505
 506    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 507    tex->total_nblocksy = 0;
 508
 509    pack_y_pitch = MAX2(nblocksy, 2);
 510    pack_x_pitch = tex->stride / util_format_get_blocksize(pt->format);
 511    pack_x_nr = 1;
 512
 513    for (level = 0; level <= pt->last_level; level++) {
 514       int x = 0;
 515       int y = 0;
 516       unsigned q, j;
 517
 518       i915_texture_set_level_info(tex, level, depth);
 519
 520       for (q = 0; q < depth;) {
 521          for (j = 0; j < pack_x_nr && q < depth; j++, q++) {
 522             i915_texture_set_image_offset(tex, level, q, x, y + tex->total_nblocksy);
 523             x += pack_x_pitch;
 524          }
 525
 526          x = 0;
 527          y += pack_y_pitch;
 528       }
 529
 530       tex->total_nblocksy += y;
 531
 532       if (pack_x_pitch > 4) {
 533          pack_x_pitch >>= 1;
 534          pack_x_nr <<= 1;
 535          assert(pack_x_pitch * pack_x_nr * util_format_get_blocksize(pt->format) <= tex->stride);
 536       }
 537
 538       if (pack_y_pitch > 2) {
 539          pack_y_pitch >>= 1;
 540       }
 541
 542       width = u_minify(width, 1);
 543       height = u_minify(height, 1);
 544       depth = u_minify(depth, 1);
 545       nblocksy = util_format_get_nblocksy(pt->format, height);
 546    }
 547 }
 548
 549 static void
 550 i945_texture_layout_cube(struct i915_texture *tex)
 551 {
 552    struct pipe_resource *pt = &tex->b.b;
 553    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 554    const unsigned dim = pt->width0;
 555    unsigned level;
 556    unsigned face;
 557
 558    assert(pt->width0 == pt->height0); /* cubemap images are square */
 559    assert(util_next_power_of_two(pt->width0) == pt->width0); /* npot only */
 560    assert(util_format_is_s3tc(pt->format)); /* compressed only */
 561
 562    /*
 563     * Depending on the size of the largest images, pitch can be
 564     * determined either by the old-style packing of cubemap faces,
 565     * or the final row of 4x4, 2x2 and 1x1 faces below this.
 566     *
 567     * 64  * 2 / 4 = 32
 568     * 14 * 2 = 28
 569     */
 570    if (pt->width0 >= 64)
 571       tex->stride = nblocks * 2 * util_format_get_blocksize(pt->format);
 572    else
 573       tex->stride = 14 * 2 * util_format_get_blocksize(pt->format);
 574
 575    /*
 576     * Something similary apply for height as well.
 577     */
 578    if (pt->width0 >= 4)
 579       tex->total_nblocksy = nblocks * 4 + 1;
 580    else
 581       tex->total_nblocksy = 1;
 582
 583    /* Set all the levels to effectively occupy the whole rectangular region */
 584    for (level = 0; level <= pt->last_level; level++)
 585       i915_texture_set_level_info(tex, level, 6);
 586
 587    for (face = 0; face < 6; face++) {
 588       /* all calculations in pixels */
 589       unsigned total_height = tex->total_nblocksy * 4;
 590       unsigned x = initial_offsets[face][0] * dim;
 591       unsigned y = initial_offsets[face][1] * dim;
 592       unsigned d = dim;
 593
 594       if (dim == 4 && face >= 4) {
 595          x = (face - 4) * 8;
 596          y = tex->total_nblocksy * 4 - 4; /* 4 = 1 block */
 597       } else if (dim < 4 && (face > 0)) {
 598          x = face * 8;
 599          y = total_height - 4;
 600       }
 601
 602       for (level = 0; level <= pt->last_level; level++) {
 603          i915_texture_set_image_offset(tex, level, face,
 604                                        util_format_get_nblocksx(pt->format, x),
 605                                        util_format_get_nblocksy(pt->format, y));
 606
 607          d >>= 1;
 608
 609          switch (d) {
 610          case 4:
 611             switch (face) {
 612             case PIPE_TEX_FACE_POS_X:
 613             case PIPE_TEX_FACE_NEG_X:
 614                x += step_offsets[face][0] * d;
 615                y += step_offsets[face][1] * d;
 616                break;
 617             case PIPE_TEX_FACE_POS_Y:
 618             case PIPE_TEX_FACE_NEG_Y:
 619                y += 12;
 620                x -= 8;
 621                break;
 622             case PIPE_TEX_FACE_POS_Z:
 623             case PIPE_TEX_FACE_NEG_Z:
 624                y = total_height - 4;
 625                x = (face - 4) * 8;
 626                break;
 627             }
 628             break;
 629          case 2:
 630             y = total_height - 4;
 631             x = bottom_offsets[face];
 632             break;
 633          case 1:
 634             x += 48;
 635             break;
 636          default:
 637             x += step_offsets[face][0] * d;
 638             y += step_offsets[face][1] * d;
 639             break;
 640          }
 641       }
 642    }
 643 }
 644
 645 static boolean
 646 i945_texture_layout(struct i915_texture * tex)
 647 {
 648    switch (tex->b.b.target) {
 649    case PIPE_TEXTURE_1D:
 650    case PIPE_TEXTURE_2D:
 651    case PIPE_TEXTURE_RECT:
 652       if (!i9x5_special_layout(tex))
 653          i945_texture_layout_2d(tex);
 654       break;
 655    case PIPE_TEXTURE_3D:
 656       i945_texture_layout_3d(tex);
 657       break;
 658    case PIPE_TEXTURE_CUBE:
 659       if (!util_format_is_s3tc(tex->b.b.format))
 660          i9x5_texture_layout_cube(tex);
 661       else
 662          i945_texture_layout_cube(tex);
 663       break;
 664    default:
 665       assert(0);
 666       return FALSE;
 667    }
 668
 669    return TRUE;
 670 }
 671
 672
 673
 674 /*
 675  * Screen texture functions
 676  */
 677
 678
 679
 680 static boolean
 681 i915_texture_get_handle(struct pipe_screen * screen,
 682                         struct pipe_resource *texture,
 683                         struct winsys_handle *whandle)
 684 {
 685    struct i915_screen *is = i915_screen(screen);
 686    struct i915_texture *tex = i915_texture(texture);
 687    struct i915_winsys *iws = is->iws;
 688
 689    return iws->buffer_get_handle(iws, tex->buffer, whandle, tex->stride);
 690 }
 691
 692
 693 static void
 694 i915_texture_destroy(struct pipe_screen *screen,
 695                      struct pipe_resource *pt)
 696 {
 697    struct i915_texture *tex = i915_texture(pt);
 698    struct i915_winsys *iws = i915_screen(screen)->iws;
 699    uint i;
 700
 701    iws->buffer_destroy(iws, tex->buffer);
 702
 703    for (i = 0; i < Elements(tex->image_offset); i++)
 704       if (tex->image_offset[i])
 705          FREE(tex->image_offset[i]);
 706
 707    FREE(tex);
 708 }
 709
 710 static struct pipe_transfer *
 711 i915_texture_get_transfer(struct pipe_context *pipe,
 712                           struct pipe_resource *resource,
 713                           unsigned level,
 714                           unsigned usage,
 715                           const struct pipe_box *box)
 716 {
 717    struct i915_context *i915 = i915_context(pipe);
 718    struct i915_texture *tex = i915_texture(resource);
 719    struct pipe_transfer *transfer = util_slab_alloc(&i915->transfer_pool);
 720
 721    if (transfer == NULL)
 722       return NULL;
 723
 724    transfer->resource = resource;
 725    transfer->level = level;
 726    transfer->usage = usage;
 727    transfer->box = *box;
 728    transfer->stride = tex->stride;
 729    /* FIXME: layer_stride */
 730
 731    return transfer;
 732 }
 733
 734 static void
 735 i915_transfer_destroy(struct pipe_context *pipe,
 736                       struct pipe_transfer *transfer)
 737 {
 738    struct i915_context *i915 = i915_context(pipe);
 739    util_slab_free(&i915->transfer_pool, transfer);
 740 }
 741
 742 static void *
 743 i915_texture_transfer_map(struct pipe_context *pipe,
 744                           struct pipe_transfer *transfer)
 745 {
 746    struct pipe_resource *resource = transfer->resource;
 747    struct i915_texture *tex = i915_texture(resource);
 748    struct i915_winsys *iws = i915_screen(pipe->screen)->iws;
 749    struct pipe_box *box = &transfer->box;
 750    enum pipe_format format = resource->format;
 751    unsigned offset;
 752    char *map;
 753
 754    if (resource->target != PIPE_TEXTURE_3D &&
 755        resource->target != PIPE_TEXTURE_CUBE)
 756       assert(box->z == 0);
 757    offset = i915_texture_offset(tex, transfer->level, box->z);
 758
 759    map = iws->buffer_map(iws, tex->buffer,
 760                          (transfer->usage & PIPE_TRANSFER_WRITE) ? TRUE : FALSE);
 761    if (map == NULL)
 762       return NULL;
 763
 764    return map + offset +
 765       box->y / util_format_get_blockheight(format) * transfer->stride +
 766       box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 767 }
 768
 769 static void
 770 i915_texture_transfer_unmap(struct pipe_context *pipe,
 771                             struct pipe_transfer *transfer)
 772 {
 773    struct i915_texture *tex = i915_texture(transfer->resource);
 774    struct i915_winsys *iws = i915_screen(tex->b.b.screen)->iws;
 775    iws->buffer_unmap(iws, tex->buffer);
 776 }
 777
 778
 779
 780 struct u_resource_vtbl i915_texture_vtbl =
 781 {
 782    i915_texture_get_handle,           /* get_handle */
 783    i915_texture_destroy,              /* resource_destroy */
 784    i915_texture_get_transfer,         /* get_transfer */
 785    i915_transfer_destroy,             /* transfer_destroy */
 786    i915_texture_transfer_map,         /* transfer_map */
 787    u_default_transfer_flush_region,   /* transfer_flush_region */
 788    i915_texture_transfer_unmap,       /* transfer_unmap */
 789    u_default_transfer_inline_write    /* transfer_inline_write */
 790 };
 791
 792
 793
 794
 795 struct pipe_resource *
 796 i915_texture_create(struct pipe_screen *screen,
 797                     const struct pipe_resource *template)
 798 {
 799    struct i915_screen *is = i915_screen(screen);
 800    struct i915_winsys *iws = is->iws;
 801    struct i915_texture *tex = CALLOC_STRUCT(i915_texture);
 802    unsigned buf_usage = 0;
 803
 804    if (!tex)
 805       return NULL;
 806
 807    tex->b.b = *template;
 808    tex->b.vtbl = &i915_texture_vtbl;
 809    pipe_reference_init(&tex->b.b.reference, 1);
 810    tex->b.b.screen = screen;
 811
 812    tex->tiling = i915_texture_tiling(is, tex);
 813
 814    if (is->is_i945) {
 815       if (!i945_texture_layout(tex))
 816          goto fail;
 817    } else {
 818       if (!i915_texture_layout(tex))
 819          goto fail;
 820    }
 821
 822    /* for scanouts and cursors, cursors arn't scanouts */
 823
 824    /* XXX: use a custom flag for cursors, don't rely on magically
 825     * guessing that this is Xorg asking for a cursor
 826     */
 827    if ((template->bind & PIPE_BIND_SCANOUT) && template->width0 != 64)
 828       buf_usage = I915_NEW_SCANOUT;
 829    else
 830       buf_usage = I915_NEW_TEXTURE;
 831
 832    tex->buffer = iws->buffer_create_tiled(iws, &tex->stride, tex->total_nblocksy,
 833                                           &tex->tiling, buf_usage);
 834    if (!tex->buffer)
 835       goto fail;
 836
 837    I915_DBG(DBG_TEXTURE, "%s: %p stride %u, blocks (%u, %u) tiling %s\n", __func__,
 838             tex, tex->stride,
 839             tex->stride / util_format_get_blocksize(tex->b.b.format),
 840             tex->total_nblocksy, get_tiling_string(tex->tiling));
 841
 842    return &tex->b.b;
 843
 844 fail:
 845    FREE(tex);
 846    return NULL;
 847 }
 848
 849 struct pipe_resource *
 850 i915_texture_from_handle(struct pipe_screen * screen,
 851                           const struct pipe_resource *template,
 852                           struct winsys_handle *whandle)
 853 {
 854    struct i915_screen *is = i915_screen(screen);
 855    struct i915_texture *tex;
 856    struct i915_winsys *iws = is->iws;
 857    struct i915_winsys_buffer *buffer;
 858    unsigned stride;
 859    enum i915_winsys_buffer_tile tiling;
 860
 861    assert(screen);
 862
 863    buffer = iws->buffer_from_handle(iws, whandle, &tiling, &stride);
 864
 865    /* Only supports one type */
 866    if ((template->target != PIPE_TEXTURE_2D &&
 867        template->target != PIPE_TEXTURE_RECT) ||
 868        template->last_level != 0 ||
 869        template->depth0 != 1) {
 870       return NULL;
 871    }
 872
 873    tex = CALLOC_STRUCT(i915_texture);
 874    if (!tex)
 875       return NULL;
 876
 877    tex->b.b = *template;
 878    tex->b.vtbl = &i915_texture_vtbl;
 879    pipe_reference_init(&tex->b.b.reference, 1);
 880    tex->b.b.screen = screen;
 881
 882    tex->stride = stride;
 883    tex->tiling = tiling;
 884    tex->total_nblocksy = align_nblocksy(tex->b.b.format, tex->b.b.height0, 8);
 885
 886    i915_texture_set_level_info(tex, 0, 1);
 887    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 888
 889    tex->buffer = buffer;
 890
 891    I915_DBG(DBG_TEXTURE, "%s: %p stride %u, blocks (%u, %u) tiling %s\n", __func__,
 892             tex, tex->stride,
 893             tex->stride / util_format_get_blocksize(tex->b.b.format),
 894             tex->total_nblocksy, get_tiling_string(tex->tiling));
 895
 896    return &tex->b.b;
 897 }
 898