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