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 /*
 110  * More advanced helper funcs
 111  */
 112
 113
 114 static void
 115 i915_texture_set_level_info(struct i915_texture *tex,
 116                             unsigned level, unsigned nr_images)
 117 {
 118    assert(level < Elements(tex->nr_images));
 119    assert(nr_images);
 120    assert(!tex->image_offset[level]);
 121
 122    tex->nr_images[level] = nr_images;
 123    tex->image_offset[level] = (unsigned *) MALLOC(nr_images * sizeof(unsigned));
 124    tex->image_offset[level][0] = 0;
 125 }
 126
 127 static void
 128 i915_texture_set_image_offset(struct i915_texture *tex,
 129                               unsigned level, unsigned img,
 130                               unsigned x, unsigned y)
 131 {
 132    /* for the first image and level make sure offset is zero */
 133    assert(!(img == 0 && level == 0) || (x == 0 && y == 0));
 134    assert(img < tex->nr_images[level]);
 135
 136    tex->image_offset[level][img] = y * tex->stride + x * util_format_get_blocksize(tex->b.b.format);
 137
 138 #if DEBUG_TEXTURES
 139    debug_printf("%s: %p level %u, img %u (%u, %u) %p\n", __FUNCTION__,
 140                 tex, level, img, x, y,
 141                 (void*)(uintptr_t)tex->image_offset[level][img]);
 142 #endif
 143 }
 144
 145
 146 /*
 147  * Shared layout functions
 148  */
 149
 150
 151 /**
 152  * Special case to deal with scanout textures.
 153  */
 154 static boolean
 155 i9x5_scanout_layout(struct i915_texture *tex)
 156 {
 157    struct pipe_resource *pt = &tex->b.b;
 158
 159    if (pt->last_level > 0 || util_format_get_blocksize(pt->format) != 4)
 160       return FALSE;
 161
 162    i915_texture_set_level_info(tex, 0, 1);
 163    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 164
 165    if (pt->width0 >= 240) {
 166       tex->stride = get_pot_stride(pt->format, pt->width0);
 167       tex->total_nblocksy = align_nblocksy(pt->format, pt->height0, 8);
 168       tex->hw_tiled = I915_TILE_X;
 169    } else if (pt->width0 == 64 && pt->height0 == 64) {
 170       tex->stride = get_pot_stride(pt->format, pt->width0);
 171       tex->total_nblocksy = align_nblocksy(pt->format, pt->height0, 8);
 172    } else {
 173       return FALSE;
 174    }
 175
 176 #if DEBUG_TEXTURE
 177    debug_printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
 178       pt->width0, pt->height0, util_format_get_blocksize(pt->format),
 179       tex->stride, tex->total_nblocksy, tex->stride * tex->total_nblocksy);
 180 #endif
 181
 182    return TRUE;
 183 }
 184
 185 /**
 186  * Special case to deal with shared textures.
 187  */
 188 static boolean
 189 i9x5_display_target_layout(struct i915_texture *tex)
 190 {
 191    struct pipe_resource *pt = &tex->b.b;
 192
 193    if (pt->last_level > 0 || util_format_get_blocksize(pt->format) != 4)
 194       return FALSE;
 195
 196    /* fallback to normal textures for small textures */
 197    if (pt->width0 < 240)
 198       return FALSE;
 199
 200    i915_texture_set_level_info(tex, 0, 1);
 201    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 202
 203    tex->stride = get_pot_stride(pt->format, pt->width0);
 204    tex->total_nblocksy = align_nblocksy(pt->format, pt->height0, 8);
 205    tex->hw_tiled = I915_TILE_X;
 206
 207 #if DEBUG_TEXTURE
 208    debug_printf("%s size: %d,%d,%d offset %d,%d (0x%x)\n", __FUNCTION__,
 209       pt->width0, pt->height0, util_format_get_blocksize(pt->format),
 210       tex->stride, tex->total_nblocksy, tex->stride * tex->total_nblocksy);
 211 #endif
 212
 213    return TRUE;
 214 }
 215
 216 /**
 217  * Helper function for special layouts
 218  */
 219 static boolean
 220 i9x5_special_layout(struct i915_texture *tex)
 221 {
 222    struct pipe_resource *pt = &tex->b.b;
 223
 224    /* Scanouts needs special care */
 225    if (pt->bind & PIPE_BIND_SCANOUT)
 226       if (i9x5_scanout_layout(tex))
 227          return TRUE;
 228
 229    /* Shared buffers needs to be compatible with X servers
 230     *
 231     * XXX: need a better name than shared for this if it is to be part
 232     * of core gallium, and probably move the flag to resource.flags,
 233     * rather than bindings.
 234     */
 235    if (pt->bind & (PIPE_BIND_SHARED | PIPE_BIND_DISPLAY_TARGET))
 236       if (i9x5_display_target_layout(tex))
 237          return TRUE;
 238
 239    return FALSE;
 240 }
 241
 242 /**
 243  * Cube layout used on i915 and for non-compressed textures on i945.
 244  */
 245 static void
 246 i9x5_texture_layout_cube(struct i915_texture *tex)
 247 {
 248    struct pipe_resource *pt = &tex->b.b;
 249    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 250    unsigned level;
 251    unsigned face;
 252
 253    assert(pt->width0 == pt->height0); /* cubemap images are square */
 254
 255    /* double pitch for cube layouts */
 256    tex->stride = align(nblocks * util_format_get_blocksize(pt->format) * 2, 4);
 257    tex->total_nblocksy = nblocks * 4;
 258
 259    for (level = 0; level <= pt->last_level; level++)
 260       i915_texture_set_level_info(tex, level, 6);
 261
 262    for (face = 0; face < 6; face++) {
 263       unsigned x = initial_offsets[face][0] * nblocks;
 264       unsigned y = initial_offsets[face][1] * nblocks;
 265       unsigned d = nblocks;
 266
 267       for (level = 0; level <= pt->last_level; level++) {
 268          i915_texture_set_image_offset(tex, level, face, x, y);
 269          d >>= 1;
 270          x += step_offsets[face][0] * d;
 271          y += step_offsets[face][1] * d;
 272       }
 273    }
 274 }
 275
 276
 277 /*
 278  * i915 layout functions
 279  */
 280
 281
 282 static void
 283 i915_texture_layout_2d(struct i915_texture *tex)
 284 {
 285    struct pipe_resource *pt = &tex->b.b;
 286    unsigned level;
 287    unsigned width = pt->width0;
 288    unsigned height = pt->height0;
 289    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 290    unsigned align_y = 2;
 291
 292    if (util_format_is_s3tc(pt->format))
 293       align_y = 1;
 294
 295    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 296    tex->total_nblocksy = 0;
 297
 298    for (level = 0; level <= pt->last_level; level++) {
 299       i915_texture_set_level_info(tex, level, 1);
 300       i915_texture_set_image_offset(tex, level, 0, 0, tex->total_nblocksy);
 301
 302       tex->total_nblocksy += nblocksy;
 303
 304       width = u_minify(width, 1);
 305       height = u_minify(height, 1);
 306       nblocksy = align_nblocksy(pt->format, height, align_y);
 307    }
 308 }
 309
 310 static void
 311 i915_texture_layout_3d(struct i915_texture *tex)
 312 {
 313    struct pipe_resource *pt = &tex->b.b;
 314    unsigned level;
 315
 316    unsigned width = pt->width0;
 317    unsigned height = pt->height0;
 318    unsigned depth = pt->depth0;
 319    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 320    unsigned stack_nblocksy = 0;
 321
 322    /* Calculate the size of a single slice.
 323     */
 324    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 325
 326    /* XXX: hardware expects/requires 9 levels at minimum.
 327     */
 328    for (level = 0; level <= MAX2(8, pt->last_level); level++) {
 329       i915_texture_set_level_info(tex, level, depth);
 330
 331       stack_nblocksy += MAX2(2, nblocksy);
 332
 333       width = u_minify(width, 1);
 334       height = u_minify(height, 1);
 335       nblocksy = util_format_get_nblocksy(pt->format, height);
 336    }
 337
 338    /* Fixup depth image_offsets:
 339     */
 340    for (level = 0; level <= pt->last_level; level++) {
 341       unsigned i;
 342       for (i = 0; i < depth; i++)
 343          i915_texture_set_image_offset(tex, level, i, 0, i * stack_nblocksy);
 344
 345       depth = u_minify(depth, 1);
 346    }
 347
 348    /* Multiply slice size by texture depth for total size.  It's
 349     * remarkable how wasteful of memory the i915 texture layouts
 350     * are.  They are largely fixed in the i945.
 351     */
 352    tex->total_nblocksy = stack_nblocksy * pt->depth0;
 353 }
 354
 355 static boolean
 356 i915_texture_layout(struct i915_texture * tex)
 357 {
 358    struct pipe_resource *pt = &tex->b.b;
 359
 360    switch (pt->target) {
 361    case PIPE_TEXTURE_1D:
 362    case PIPE_TEXTURE_2D:
 363       if (!i9x5_special_layout(tex))
 364          i915_texture_layout_2d(tex);
 365       break;
 366    case PIPE_TEXTURE_3D:
 367       i915_texture_layout_3d(tex);
 368       break;
 369    case PIPE_TEXTURE_CUBE:
 370       i9x5_texture_layout_cube(tex);
 371       break;
 372    default:
 373       assert(0);
 374       return FALSE;
 375    }
 376
 377    return TRUE;
 378 }
 379
 380
 381 /*
 382  * i945 layout functions
 383  */
 384
 385
 386 static void
 387 i945_texture_layout_2d(struct i915_texture *tex)
 388 {
 389    struct pipe_resource *pt = &tex->b.b;
 390    int align_x = 4, align_y = 2;
 391    unsigned level;
 392    unsigned x = 0;
 393    unsigned y = 0;
 394    unsigned width = pt->width0;
 395    unsigned height = pt->height0;
 396    unsigned nblocksx = util_format_get_nblocksx(pt->format, pt->width0);
 397    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->height0);
 398
 399    if (util_format_is_s3tc(pt->format)) {
 400       align_x = 1;
 401       align_y = 1;
 402    }
 403
 404    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 405
 406    /* May need to adjust pitch to accomodate the placement of
 407     * the 2nd mipmap level.  This occurs when the alignment
 408     * constraints of mipmap placement push the right edge of the
 409     * 2nd mipmap level out past the width of its parent.
 410     */
 411    if (pt->last_level > 0) {
 412       unsigned mip1_nblocksx =
 413          align_nblocksx(pt->format, u_minify(pt->width0, 1), align_x) +
 414          util_format_get_nblocksx(pt->format, u_minify(pt->width0, 2));
 415
 416       if (mip1_nblocksx > nblocksx)
 417          tex->stride = mip1_nblocksx * util_format_get_blocksize(pt->format);
 418    }
 419
 420    /* Pitch must be a whole number of dwords
 421     */
 422    tex->stride = align(tex->stride, 64);
 423    tex->total_nblocksy = 0;
 424
 425    for (level = 0; level <= pt->last_level; level++) {
 426       i915_texture_set_level_info(tex, level, 1);
 427       i915_texture_set_image_offset(tex, level, 0, x, y);
 428
 429       /* Because the images are packed better, the final offset
 430        * might not be the maximal one:
 431        */
 432       tex->total_nblocksy = MAX2(tex->total_nblocksy, y + nblocksy);
 433
 434       /* Layout_below: step right after second mipmap level.
 435        */
 436       if (level == 1) {
 437          x += nblocksx;
 438       } else {
 439          y += nblocksy;
 440       }
 441
 442       width  = u_minify(width, 1);
 443       height = u_minify(height, 1);
 444       nblocksx = align_nblocksx(pt->format, width, align_x);
 445       nblocksy = align_nblocksy(pt->format, height, align_y);
 446    }
 447 }
 448
 449 static void
 450 i945_texture_layout_3d(struct i915_texture *tex)
 451 {
 452    struct pipe_resource *pt = &tex->b.b;
 453    unsigned width = pt->width0;
 454    unsigned height = pt->height0;
 455    unsigned depth = pt->depth0;
 456    unsigned nblocksy = util_format_get_nblocksy(pt->format, pt->width0);
 457    unsigned pack_x_pitch, pack_x_nr;
 458    unsigned pack_y_pitch;
 459    unsigned level;
 460
 461    tex->stride = align(util_format_get_stride(pt->format, pt->width0), 4);
 462    tex->total_nblocksy = 0;
 463
 464    pack_y_pitch = MAX2(nblocksy, 2);
 465    pack_x_pitch = tex->stride / util_format_get_blocksize(pt->format);
 466    pack_x_nr = 1;
 467
 468    for (level = 0; level <= pt->last_level; level++) {
 469       int x = 0;
 470       int y = 0;
 471       unsigned q, j;
 472
 473       i915_texture_set_level_info(tex, level, depth);
 474
 475       for (q = 0; q < depth;) {
 476          for (j = 0; j < pack_x_nr && q < depth; j++, q++) {
 477             i915_texture_set_image_offset(tex, level, q, x, y + tex->total_nblocksy);
 478             x += pack_x_pitch;
 479          }
 480
 481          x = 0;
 482          y += pack_y_pitch;
 483       }
 484
 485       tex->total_nblocksy += y;
 486
 487       if (pack_x_pitch > 4) {
 488          pack_x_pitch >>= 1;
 489          pack_x_nr <<= 1;
 490          assert(pack_x_pitch * pack_x_nr * util_format_get_blocksize(pt->format) <= tex->stride);
 491       }
 492
 493       if (pack_y_pitch > 2) {
 494          pack_y_pitch >>= 1;
 495       }
 496
 497       width = u_minify(width, 1);
 498       height = u_minify(height, 1);
 499       depth = u_minify(depth, 1);
 500       nblocksy = util_format_get_nblocksy(pt->format, height);
 501    }
 502 }
 503
 504 static void
 505 i945_texture_layout_cube(struct i915_texture *tex)
 506 {
 507    struct pipe_resource *pt = &tex->b.b;
 508    const unsigned nblocks = util_format_get_nblocksx(pt->format, pt->width0);
 509    const unsigned dim = pt->width0;
 510    unsigned level;
 511    unsigned face;
 512
 513    assert(pt->width0 == pt->height0); /* cubemap images are square */
 514    assert(util_next_power_of_two(pt->width0) == pt->width0); /* npot only */
 515    assert(util_format_is_s3tc(pt->format)); /* compressed only */
 516
 517    /*
 518     * Depending on the size of the largest images, pitch can be
 519     * determined either by the old-style packing of cubemap faces,
 520     * or the final row of 4x4, 2x2 and 1x1 faces below this.
 521     *
 522     * 64  * 2 / 4 = 32
 523     * 14 * 2 = 28
 524     */
 525    if (pt->width0 >= 64)
 526       tex->stride = nblocks * 2 * util_format_get_blocksize(pt->format);
 527    else
 528       tex->stride = 14 * 2 * util_format_get_blocksize(pt->format);
 529
 530    /*
 531     * Something similary apply for height as well.
 532     */
 533    if (pt->width0 >= 4)
 534       tex->total_nblocksy = nblocks * 4 + 1;
 535    else
 536       tex->total_nblocksy = 1;
 537
 538    /* Set all the levels to effectively occupy the whole rectangular region */
 539    for (level = 0; level <= pt->last_level; level++)
 540       i915_texture_set_level_info(tex, level, 6);
 541
 542    for (face = 0; face < 6; face++) {
 543       /* all calculations in pixels */
 544       unsigned total_height = tex->total_nblocksy * 4;
 545       unsigned x = initial_offsets[face][0] * dim;
 546       unsigned y = initial_offsets[face][1] * dim;
 547       unsigned d = dim;
 548
 549       if (dim == 4 && face >= 4) {
 550          x = (face - 4) * 8;
 551          y = tex->total_nblocksy * 4 - 4; /* 4 = 1 block */
 552       } else if (dim < 4 && (face > 0)) {
 553          x = face * 8;
 554          y = total_height - 4;
 555       }
 556
 557       for (level = 0; level <= pt->last_level; level++) {
 558          i915_texture_set_image_offset(tex, level, face,
 559                                        util_format_get_nblocksx(pt->format, x),
 560                                        util_format_get_nblocksy(pt->format, y));
 561
 562          d >>= 1;
 563
 564          switch (d) {
 565          case 4:
 566             switch (face) {
 567             case PIPE_TEX_FACE_POS_X:
 568             case PIPE_TEX_FACE_NEG_X:
 569                x += step_offsets[face][0] * d;
 570                y += step_offsets[face][1] * d;
 571                break;
 572             case PIPE_TEX_FACE_POS_Y:
 573             case PIPE_TEX_FACE_NEG_Y:
 574                y += 12;
 575                x -= 8;
 576                break;
 577             case PIPE_TEX_FACE_POS_Z:
 578             case PIPE_TEX_FACE_NEG_Z:
 579                y = total_height - 4;
 580                x = (face - 4) * 8;
 581                break;
 582             }
 583             break;
 584          case 2:
 585             y = total_height - 4;
 586             x = bottom_offsets[face];
 587             break;
 588          case 1:
 589             x += 48;
 590             break;
 591          default:
 592             x += step_offsets[face][0] * d;
 593             y += step_offsets[face][1] * d;
 594             break;
 595          }
 596       }
 597    }
 598 }
 599
 600 static boolean
 601 i945_texture_layout(struct i915_texture * tex)
 602 {
 603    struct pipe_resource *pt = &tex->b.b;
 604
 605    switch (pt->target) {
 606    case PIPE_TEXTURE_1D:
 607    case PIPE_TEXTURE_2D:
 608       if (!i9x5_special_layout(tex))
 609          i945_texture_layout_2d(tex);
 610       break;
 611    case PIPE_TEXTURE_3D:
 612       i945_texture_layout_3d(tex);
 613       break;
 614    case PIPE_TEXTURE_CUBE:
 615       if (!util_format_is_s3tc(pt->format))
 616          i9x5_texture_layout_cube(tex);
 617       else
 618          i945_texture_layout_cube(tex);
 619       break;
 620    default:
 621       assert(0);
 622       return FALSE;
 623    }
 624
 625    return TRUE;
 626 }
 627
 628
 629
 630 /*
 631  * Screen texture functions
 632  */
 633
 634
 635
 636 static boolean
 637 i915_texture_get_handle(struct pipe_screen * screen,
 638                         struct pipe_resource *texture,
 639                         struct winsys_handle *whandle)
 640 {
 641    struct i915_screen *is = i915_screen(screen);
 642    struct i915_texture *tex = i915_texture(texture);
 643    struct i915_winsys *iws = is->iws;
 644
 645    return iws->buffer_get_handle(iws, tex->buffer, whandle, tex->stride);
 646 }
 647
 648
 649 static void
 650 i915_texture_destroy(struct pipe_screen *screen,
 651                      struct pipe_resource *pt)
 652 {
 653    struct i915_texture *tex = i915_texture(pt);
 654    struct i915_winsys *iws = i915_screen(screen)->iws;
 655    uint i;
 656
 657    iws->buffer_destroy(iws, tex->buffer);
 658
 659    for (i = 0; i < Elements(tex->image_offset); i++)
 660       if (tex->image_offset[i])
 661          FREE(tex->image_offset[i]);
 662
 663    FREE(tex);
 664 }
 665
 666 static struct pipe_transfer *
 667 i915_texture_get_transfer(struct pipe_context *context,
 668                           struct pipe_resource *resource,
 669                           struct pipe_subresource sr,
 670                           unsigned usage,
 671                           const struct pipe_box *box)
 672 {
 673    struct i915_texture *tex = i915_texture(resource);
 674    struct pipe_transfer *transfer = CALLOC_STRUCT(pipe_transfer);
 675    if (transfer == NULL)
 676       return NULL;
 677
 678    transfer->resource = resource;
 679    transfer->sr = sr;
 680    transfer->usage = usage;
 681    transfer->box = *box;
 682    transfer->stride = tex->stride;
 683
 684    return transfer;
 685 }
 686
 687
 688 static void *
 689 i915_texture_transfer_map(struct pipe_context *pipe,
 690                           struct pipe_transfer *transfer)
 691 {
 692    struct pipe_resource *resource = transfer->resource;
 693    struct i915_texture *tex = i915_texture(resource);
 694    struct i915_winsys *iws = i915_screen(pipe->screen)->iws;
 695    struct pipe_subresource sr = transfer->sr;
 696    struct pipe_box *box = &transfer->box;
 697    enum pipe_format format = resource->format;
 698    unsigned offset;
 699    char *map;
 700
 701    if (resource->target == PIPE_TEXTURE_CUBE) {
 702       offset = tex->image_offset[sr.level][sr.face];
 703    } else if (resource->target == PIPE_TEXTURE_3D) {
 704       offset = tex->image_offset[sr.level][box->z];
 705    } else {
 706       offset = tex->image_offset[sr.level][0];
 707       assert(sr.face == 0);
 708       assert(box->z == 0);
 709    }
 710
 711    map = iws->buffer_map(iws, tex->buffer,
 712                          (transfer->usage & PIPE_TRANSFER_WRITE) ? TRUE : FALSE);
 713    if (map == NULL)
 714       return NULL;
 715
 716    return map + offset +
 717       box->y / util_format_get_blockheight(format) * transfer->stride +
 718       box->x / util_format_get_blockwidth(format) * util_format_get_blocksize(format);
 719 }
 720
 721 static void
 722 i915_texture_transfer_unmap(struct pipe_context *pipe,
 723                             struct pipe_transfer *transfer)
 724 {
 725    struct i915_texture *tex = i915_texture(transfer->resource);
 726    struct i915_winsys *iws = i915_screen(tex->b.b.screen)->iws;
 727    iws->buffer_unmap(iws, tex->buffer);
 728 }
 729
 730
 731
 732 struct u_resource_vtbl i915_texture_vtbl =
 733 {
 734    i915_texture_get_handle,           /* get_handle */
 735    i915_texture_destroy,              /* resource_destroy */
 736    NULL,                              /* is_resource_referenced */
 737    i915_texture_get_transfer,         /* get_transfer */
 738    u_default_transfer_destroy,        /* transfer_destroy */
 739    i915_texture_transfer_map,         /* transfer_map */
 740    u_default_transfer_flush_region,   /* transfer_flush_region */
 741    i915_texture_transfer_unmap,       /* transfer_unmap */
 742    u_default_transfer_inline_write    /* transfer_inline_write */
 743 };
 744
 745
 746
 747
 748 struct pipe_resource *
 749 i915_texture_create(struct pipe_screen *screen,
 750                     const struct pipe_resource *template)
 751 {
 752    struct i915_screen *is = i915_screen(screen);
 753    struct i915_winsys *iws = is->iws;
 754    struct i915_texture *tex = CALLOC_STRUCT(i915_texture);
 755    size_t tex_size;
 756    unsigned buf_usage = 0;
 757
 758    if (!tex)
 759       return NULL;
 760
 761    tex->b.b = *template;
 762    tex->b.vtbl = &i915_texture_vtbl;
 763    pipe_reference_init(&tex->b.b.reference, 1);
 764    tex->b.b.screen = screen;
 765
 766    if (is->is_i945) {
 767       if (!i945_texture_layout(tex))
 768          goto fail;
 769    } else {
 770       if (!i915_texture_layout(tex))
 771          goto fail;
 772    }
 773
 774    tex_size = tex->stride * tex->total_nblocksy;
 775
 776    /* for scanouts and cursors, cursors arn't scanouts */
 777
 778    /* XXX: use a custom flag for cursors, don't rely on magically
 779     * guessing that this is Xorg asking for a cursor
 780     */
 781    if ((template->bind & PIPE_BIND_SCANOUT) && template->width0 != 64)
 782       buf_usage = I915_NEW_SCANOUT;
 783    else
 784       buf_usage = I915_NEW_TEXTURE;
 785
 786    tex->buffer = iws->buffer_create(iws, tex_size, 64, buf_usage);
 787    if (!tex->buffer)
 788       goto fail;
 789
 790    /* setup any hw fences */
 791    if (tex->hw_tiled) {
 792       assert(tex->sw_tiled == I915_TILE_NONE);
 793       iws->buffer_set_fence_reg(iws, tex->buffer, tex->stride, tex->hw_tiled);
 794    }
 795
 796
 797 #if 0
 798    void *ptr = ws->buffer_map(ws, tex->buffer,
 799       PIPE_BUFFER_USAGE_CPU_WRITE);
 800    memset(ptr, 0x80, tex_size);
 801    ws->buffer_unmap(ws, tex->buffer);
 802 #endif
 803
 804    I915_DBG(DBG_TEXTURE, "%s: %p size %u, stride %u, blocks (%u, %u)\n", __func__,
 805             tex, (unsigned int)tex_size, tex->stride,
 806             tex->stride / util_format_get_blocksize(tex->b.b.format),
 807             tex->total_nblocksy);
 808
 809    return &tex->b.b;
 810
 811 fail:
 812    FREE(tex);
 813    return NULL;
 814 }
 815
 816 struct pipe_resource *
 817 i915_texture_from_handle(struct pipe_screen * screen,
 818                           const struct pipe_resource *template,
 819                           struct winsys_handle *whandle)
 820 {
 821    struct i915_screen *is = i915_screen(screen);
 822    struct i915_texture *tex;
 823    struct i915_winsys *iws = is->iws;
 824    struct i915_winsys_buffer *buffer;
 825    unsigned stride;
 826
 827    assert(screen);
 828
 829    buffer = iws->buffer_from_handle(iws, whandle, &stride);
 830
 831    /* Only supports one type */
 832    if (template->target != PIPE_TEXTURE_2D ||
 833        template->last_level != 0 ||
 834        template->depth0 != 1) {
 835       return NULL;
 836    }
 837
 838    tex = CALLOC_STRUCT(i915_texture);
 839    if (!tex)
 840       return NULL;
 841
 842    tex->b.b = *template;
 843    tex->b.vtbl = &i915_texture_vtbl;
 844    pipe_reference_init(&tex->b.b.reference, 1);
 845    tex->b.b.screen = screen;
 846
 847    tex->stride = stride;
 848
 849    i915_texture_set_level_info(tex, 0, 1);
 850    i915_texture_set_image_offset(tex, 0, 0, 0, 0);
 851
 852    tex->buffer = buffer;
 853
 854    I915_DBG(DBG_TEXTURE, "%s: %p stride %u, blocks (%ux%u)\n", __func__,
 855             tex, tex->stride,
 856             tex->stride / util_format_get_blocksize(tex->b.b.format),
 857             tex->total_nblocksy);
 858
 859    return &tex->b.b;
 860 }
 861