src/gallium/auxiliary/util/u_tile.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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 /**
  29  * RGBA/float tile get/put functions.
  30  * Usable both by drivers and state trackers.
  31  */
  32
  33
  34 #include "pipe/p_defines.h"
  35 #include "util/u_inlines.h"
  36
  37 #include "util/u_format.h"
  38 #include "util/u_math.h"
  39 #include "util/u_memory.h"
  40 #include "util/u_rect.h"
  41 #include "util/u_tile.h"
  42
  43
  44 /**
  45  * Move raw block of pixels from transfer object to user memory.
  46  */
  47 void
  48 pipe_get_tile_raw(struct pipe_transfer *pt,
  49                   uint x, uint y, uint w, uint h,
  50                   void *dst, int dst_stride)
  51 {
  52    struct pipe_screen *screen = pt->texture->screen;
  53    const void *src;
  54
  55    if (dst_stride == 0)
  56       dst_stride = util_format_get_stride(pt->texture->format, w);
  57
  58    if (pipe_clip_tile(x, y, &w, &h, pt))
  59       return;
  60
  61    src = screen->transfer_map(screen, pt);
  62    assert(src);
  63    if(!src)
  64       return;
  65
  66    util_copy_rect(dst, pt->texture->format, dst_stride, 0, 0, w, h, src, pt->stride, x, y);
  67
  68    screen->transfer_unmap(screen, pt);
  69 }
  70
  71
  72 /**
  73  * Move raw block of pixels from user memory to transfer object.
  74  */
  75 void
  76 pipe_put_tile_raw(struct pipe_transfer *pt,
  77                   uint x, uint y, uint w, uint h,
  78                   const void *src, int src_stride)
  79 {
  80    struct pipe_screen *screen = pt->texture->screen;
  81    void *dst;
  82    enum pipe_format format = pt->texture->format;
  83
  84    if (src_stride == 0)
  85       src_stride = util_format_get_stride(format, w);
  86
  87    if (pipe_clip_tile(x, y, &w, &h, pt))
  88       return;
  89
  90    dst = screen->transfer_map(screen, pt);
  91    assert(dst);
  92    if(!dst)
  93       return;
  94
  95    util_copy_rect(dst, format, pt->stride, x, y, w, h, src, src_stride, 0, 0);
  96
  97    screen->transfer_unmap(screen, pt);
  98 }
  99
 100
 101
 102
 103 /** Convert short in [-32768,32767] to GLfloat in [-1.0,1.0] */
 104 #define SHORT_TO_FLOAT(S)   ((2.0F * (S) + 1.0F) * (1.0F/65535.0F))
 105
 106 #define UNCLAMPED_FLOAT_TO_SHORT(us, f)  \
 107    us = ( (short) ( CLAMP((f), -1.0, 1.0) * 32767.0F) )
 108
 109
 110
 111 /*** PIPE_FORMAT_B8G8R8A8_UNORM ***/
 112
 113 static void
 114 a8r8g8b8_get_tile_rgba(const unsigned *src,
 115                        unsigned w, unsigned h,
 116                        float *p,
 117                        unsigned dst_stride)
 118 {
 119    unsigned i, j;
 120
 121    for (i = 0; i < h; i++) {
 122       float *pRow = p;
 123       for (j = 0; j < w; j++, pRow += 4) {
 124          const unsigned pixel = *src++;
 125          pRow[0] = ubyte_to_float((pixel >> 16) & 0xff);
 126          pRow[1] = ubyte_to_float((pixel >>  8) & 0xff);
 127          pRow[2] = ubyte_to_float((pixel >>  0) & 0xff);
 128          pRow[3] = ubyte_to_float((pixel >> 24) & 0xff);
 129       }
 130       p += dst_stride;
 131    }
 132 }
 133
 134
 135 static void
 136 a8r8g8b8_put_tile_rgba(unsigned *dst,
 137                        unsigned w, unsigned h,
 138                        const float *p,
 139                        unsigned src_stride)
 140 {
 141    unsigned i, j;
 142
 143    for (i = 0; i < h; i++) {
 144       const float *pRow = p;
 145       for (j = 0; j < w; j++, pRow += 4) {
 146          unsigned r, g, b, a;
 147          r = float_to_ubyte(pRow[0]);
 148          g = float_to_ubyte(pRow[1]);
 149          b = float_to_ubyte(pRow[2]);
 150          a = float_to_ubyte(pRow[3]);
 151          *dst++ = (a << 24) | (r << 16) | (g << 8) | b;
 152       }
 153       p += src_stride;
 154    }
 155 }
 156
 157
 158 /*** PIPE_FORMAT_B8G8R8X8_UNORM ***/
 159
 160 static void
 161 x8r8g8b8_get_tile_rgba(const unsigned *src,
 162                        unsigned w, unsigned h,
 163                        float *p,
 164                        unsigned dst_stride)
 165 {
 166    unsigned i, j;
 167
 168    for (i = 0; i < h; i++) {
 169       float *pRow = p;
 170       for (j = 0; j < w; j++, pRow += 4) {
 171          const unsigned pixel = *src++;
 172          pRow[0] = ubyte_to_float((pixel >> 16) & 0xff);
 173          pRow[1] = ubyte_to_float((pixel >>  8) & 0xff);
 174          pRow[2] = ubyte_to_float((pixel >>  0) & 0xff);
 175          pRow[3] = 1.0F;
 176       }
 177       p += dst_stride;
 178    }
 179 }
 180
 181
 182 static void
 183 x8r8g8b8_put_tile_rgba(unsigned *dst,
 184                        unsigned w, unsigned h,
 185                        const float *p,
 186                        unsigned src_stride)
 187 {
 188    unsigned i, j;
 189
 190    for (i = 0; i < h; i++) {
 191       const float *pRow = p;
 192       for (j = 0; j < w; j++, pRow += 4) {
 193          unsigned r, g, b;
 194          r = float_to_ubyte(pRow[0]);
 195          g = float_to_ubyte(pRow[1]);
 196          b = float_to_ubyte(pRow[2]);
 197          *dst++ = (0xff << 24) | (r << 16) | (g << 8) | b;
 198       }
 199       p += src_stride;
 200    }
 201 }
 202
 203
 204 /*** PIPE_FORMAT_A8R8G8B8_UNORM ***/
 205
 206 static void
 207 b8g8r8a8_get_tile_rgba(const unsigned *src,
 208                        unsigned w, unsigned h,
 209                        float *p,
 210                        unsigned dst_stride)
 211 {
 212    unsigned i, j;
 213
 214    for (i = 0; i < h; i++) {
 215       float *pRow = p;
 216       for (j = 0; j < w; j++, pRow += 4) {
 217          const unsigned pixel = *src++;
 218          pRow[0] = ubyte_to_float((pixel >>  8) & 0xff);
 219          pRow[1] = ubyte_to_float((pixel >> 16) & 0xff);
 220          pRow[2] = ubyte_to_float((pixel >> 24) & 0xff);
 221          pRow[3] = ubyte_to_float((pixel >>  0) & 0xff);
 222       }
 223       p += dst_stride;
 224    }
 225 }
 226
 227
 228 static void
 229 b8g8r8a8_put_tile_rgba(unsigned *dst,
 230                        unsigned w, unsigned h,
 231                        const float *p,
 232                        unsigned src_stride)
 233 {
 234    unsigned i, j;
 235
 236    for (i = 0; i < h; i++) {
 237       const float *pRow = p;
 238       for (j = 0; j < w; j++, pRow += 4) {
 239          unsigned r, g, b, a;
 240          r = float_to_ubyte(pRow[0]);
 241          g = float_to_ubyte(pRow[1]);
 242          b = float_to_ubyte(pRow[2]);
 243          a = float_to_ubyte(pRow[3]);
 244          *dst++ = (b << 24) | (g << 16) | (r << 8) | a;
 245       }
 246       p += src_stride;
 247    }
 248 }
 249
 250
 251 /*** PIPE_FORMAT_A8B8G8R8_UNORM ***/
 252
 253 static void
 254 r8g8b8a8_get_tile_rgba(const unsigned *src,
 255                        unsigned w, unsigned h,
 256                        float *p,
 257                        unsigned dst_stride)
 258 {
 259    unsigned i, j;
 260
 261    for (i = 0; i < h; i++) {
 262       float *pRow = p;
 263       for (j = 0; j < w; j++, pRow += 4) {
 264          const unsigned pixel = *src++;
 265          pRow[0] = ubyte_to_float((pixel >> 24) & 0xff);
 266          pRow[1] = ubyte_to_float((pixel >> 16) & 0xff);
 267          pRow[2] = ubyte_to_float((pixel >>  8) & 0xff);
 268          pRow[3] = ubyte_to_float((pixel >>  0) & 0xff);
 269       }
 270       p += dst_stride;
 271    }
 272 }
 273
 274
 275 static void
 276 r8g8b8a8_put_tile_rgba(unsigned *dst,
 277                        unsigned w, unsigned h,
 278                        const float *p,
 279                        unsigned src_stride)
 280 {
 281    unsigned i, j;
 282
 283    for (i = 0; i < h; i++) {
 284       const float *pRow = p;
 285       for (j = 0; j < w; j++, pRow += 4) {
 286          unsigned r, g, b, a;
 287          r = float_to_ubyte(pRow[0]);
 288          g = float_to_ubyte(pRow[1]);
 289          b = float_to_ubyte(pRow[2]);
 290          a = float_to_ubyte(pRow[3]);
 291          *dst++ = (r << 24) | (g << 16) | (b << 8) | a;
 292       }
 293       p += src_stride;
 294    }
 295 }
 296
 297
 298 /*** PIPE_FORMAT_B5G5R5A1_UNORM ***/
 299
 300 static void
 301 a1r5g5b5_get_tile_rgba(const ushort *src,
 302                        unsigned w, unsigned h,
 303                        float *p,
 304                        unsigned dst_stride)
 305 {
 306    unsigned i, j;
 307
 308    for (i = 0; i < h; i++) {
 309       float *pRow = p;
 310       for (j = 0; j < w; j++, pRow += 4) {
 311          const ushort pixel = *src++;
 312          pRow[0] = ((pixel >> 10) & 0x1f) * (1.0f / 31.0f);
 313          pRow[1] = ((pixel >>  5) & 0x1f) * (1.0f / 31.0f);
 314          pRow[2] = ((pixel      ) & 0x1f) * (1.0f / 31.0f);
 315          pRow[3] = ((pixel >> 15)       ) * 1.0f;
 316       }
 317       p += dst_stride;
 318    }
 319 }
 320
 321
 322 static void
 323 a1r5g5b5_put_tile_rgba(ushort *dst,
 324                        unsigned w, unsigned h,
 325                        const float *p,
 326                        unsigned src_stride)
 327 {
 328    unsigned i, j;
 329
 330    for (i = 0; i < h; i++) {
 331       const float *pRow = p;
 332       for (j = 0; j < w; j++, pRow += 4) {
 333          unsigned r, g, b, a;
 334          r = float_to_ubyte(pRow[0]);
 335          g = float_to_ubyte(pRow[1]);
 336          b = float_to_ubyte(pRow[2]);
 337          a = float_to_ubyte(pRow[3]);
 338          r = r >> 3;  /* 5 bits */
 339          g = g >> 3;  /* 5 bits */
 340          b = b >> 3;  /* 5 bits */
 341          a = a >> 7;  /* 1 bit */
 342          *dst++ = (a << 15) | (r << 10) | (g << 5) | b;
 343       }
 344       p += src_stride;
 345    }
 346 }
 347
 348
 349 /*** PIPE_FORMAT_B4G4R4A4_UNORM ***/
 350
 351 static void
 352 a4r4g4b4_get_tile_rgba(const ushort *src,
 353                        unsigned w, unsigned h,
 354                        float *p,
 355                        unsigned dst_stride)
 356 {
 357    unsigned i, j;
 358
 359    for (i = 0; i < h; i++) {
 360       float *pRow = p;
 361       for (j = 0; j < w; j++, pRow += 4) {
 362          const ushort pixel = *src++;
 363          pRow[0] = ((pixel >>  8) & 0xf) * (1.0f / 15.0f);
 364          pRow[1] = ((pixel >>  4) & 0xf) * (1.0f / 15.0f);
 365          pRow[2] = ((pixel      ) & 0xf) * (1.0f / 15.0f);
 366          pRow[3] = ((pixel >> 12)      ) * (1.0f / 15.0f);
 367       }
 368       p += dst_stride;
 369    }
 370 }
 371
 372
 373 static void
 374 a4r4g4b4_put_tile_rgba(ushort *dst,
 375                        unsigned w, unsigned h,
 376                        const float *p,
 377                        unsigned src_stride)
 378 {
 379    unsigned i, j;
 380
 381    for (i = 0; i < h; i++) {
 382       const float *pRow = p;
 383       for (j = 0; j < w; j++, pRow += 4) {
 384          unsigned r, g, b, a;
 385          r = float_to_ubyte(pRow[0]);
 386          g = float_to_ubyte(pRow[1]);
 387          b = float_to_ubyte(pRow[2]);
 388          a = float_to_ubyte(pRow[3]);
 389          r >>= 4;
 390          g >>= 4;
 391          b >>= 4;
 392          a >>= 4;
 393          *dst++ = (a << 12) | (r << 8) | (g << 4) | b;
 394       }
 395       p += src_stride;
 396    }
 397 }
 398
 399
 400 /*** PIPE_FORMAT_B5G6R5_UNORM ***/
 401
 402 static void
 403 r5g6b5_get_tile_rgba(const ushort *src,
 404                      unsigned w, unsigned h,
 405                      float *p,
 406                      unsigned dst_stride)
 407 {
 408    unsigned i, j;
 409
 410    for (i = 0; i < h; i++) {
 411       float *pRow = p;
 412       for (j = 0; j < w; j++, pRow += 4) {
 413          const ushort pixel = *src++;
 414          pRow[0] = ((pixel >> 11) & 0x1f) * (1.0f / 31.0f);
 415          pRow[1] = ((pixel >>  5) & 0x3f) * (1.0f / 63.0f);
 416          pRow[2] = ((pixel      ) & 0x1f) * (1.0f / 31.0f);
 417          pRow[3] = 1.0f;
 418       }
 419       p += dst_stride;
 420    }
 421 }
 422
 423
 424 static void
 425 r5g6b5_put_tile_rgba(ushort *dst,
 426                      unsigned w, unsigned h,
 427                      const float *p,
 428                      unsigned src_stride)
 429 {
 430    unsigned i, j;
 431
 432    for (i = 0; i < h; i++) {
 433       const float *pRow = p;
 434       for (j = 0; j < w; j++, pRow += 4) {
 435          uint r = (uint) (CLAMP(pRow[0], 0.0, 1.0) * 31.0);
 436          uint g = (uint) (CLAMP(pRow[1], 0.0, 1.0) * 63.0);
 437          uint b = (uint) (CLAMP(pRow[2], 0.0, 1.0) * 31.0);
 438          *dst++ = (r << 11) | (g << 5) | (b);
 439       }
 440       p += src_stride;
 441    }
 442 }
 443
 444
 445
 446 /*** PIPE_FORMAT_R8G8B8_UNORM ***/
 447
 448 static void
 449 r8g8b8_get_tile_rgba(const ubyte *src,
 450                      unsigned w, unsigned h,
 451                      float *p,
 452                      unsigned dst_stride)
 453 {
 454    unsigned i, j;
 455
 456    for (i = 0; i < h; i++) {
 457       float *pRow = p;
 458       for (j = 0; j < w; j++, pRow += 4) {
 459          pRow[0] = ubyte_to_float(src[0]);
 460          pRow[1] = ubyte_to_float(src[1]);
 461          pRow[2] = ubyte_to_float(src[2]);
 462          pRow[3] = 1.0f;
 463          src += 3;
 464       }
 465       p += dst_stride;
 466    }
 467 }
 468
 469
 470 static void
 471 r8g8b8_put_tile_rgba(ubyte *dst,
 472                      unsigned w, unsigned h,
 473                      const float *p,
 474                      unsigned src_stride)
 475 {
 476    unsigned i, j;
 477
 478    for (i = 0; i < h; i++) {
 479       const float *pRow = p;
 480       for (j = 0; j < w; j++, pRow += 4) {
 481          dst[0] = float_to_ubyte(pRow[0]);
 482          dst[1] = float_to_ubyte(pRow[1]);
 483          dst[2] = float_to_ubyte(pRow[2]);
 484          dst += 3;
 485       }
 486       p += src_stride;
 487    }
 488 }
 489
 490
 491
 492 /*** PIPE_FORMAT_Z16_UNORM ***/
 493
 494 /**
 495  * Return each Z value as four floats in [0,1].
 496  */
 497 static void
 498 z16_get_tile_rgba(const ushort *src,
 499                   unsigned w, unsigned h,
 500                   float *p,
 501                   unsigned dst_stride)
 502 {
 503    const float scale = 1.0f / 65535.0f;
 504    unsigned i, j;
 505
 506    for (i = 0; i < h; i++) {
 507       float *pRow = p;
 508       for (j = 0; j < w; j++, pRow += 4) {
 509          pRow[0] =
 510          pRow[1] =
 511          pRow[2] =
 512          pRow[3] = *src++ * scale;
 513       }
 514       p += dst_stride;
 515    }
 516 }
 517
 518
 519
 520
 521 /*** PIPE_FORMAT_L8_UNORM ***/
 522
 523 static void
 524 l8_get_tile_rgba(const ubyte *src,
 525                  unsigned w, unsigned h,
 526                  float *p,
 527                  unsigned dst_stride)
 528 {
 529    unsigned i, j;
 530
 531    for (i = 0; i < h; i++) {
 532       float *pRow = p;
 533       for (j = 0; j < w; j++, src++, pRow += 4) {
 534          pRow[0] =
 535          pRow[1] =
 536          pRow[2] = ubyte_to_float(*src);
 537          pRow[3] = 1.0;
 538       }
 539       p += dst_stride;
 540    }
 541 }
 542
 543
 544 static void
 545 l8_put_tile_rgba(ubyte *dst,
 546                  unsigned w, unsigned h,
 547                  const float *p,
 548                  unsigned src_stride)
 549 {
 550    unsigned i, j;
 551
 552    for (i = 0; i < h; i++) {
 553       const float *pRow = p;
 554       for (j = 0; j < w; j++, pRow += 4) {
 555          unsigned r;
 556          r = float_to_ubyte(pRow[0]);
 557          *dst++ = (ubyte) r;
 558       }
 559       p += src_stride;
 560    }
 561 }
 562
 563
 564
 565 /*** PIPE_FORMAT_A8_UNORM ***/
 566
 567 static void
 568 a8_get_tile_rgba(const ubyte *src,
 569                  unsigned w, unsigned h,
 570                  float *p,
 571                  unsigned dst_stride)
 572 {
 573    unsigned i, j;
 574
 575    for (i = 0; i < h; i++) {
 576       float *pRow = p;
 577       for (j = 0; j < w; j++, src++, pRow += 4) {
 578          pRow[0] =
 579          pRow[1] =
 580          pRow[2] = 0.0;
 581          pRow[3] = ubyte_to_float(*src);
 582       }
 583       p += dst_stride;
 584    }
 585 }
 586
 587
 588 static void
 589 a8_put_tile_rgba(ubyte *dst,
 590                  unsigned w, unsigned h,
 591                  const float *p,
 592                  unsigned src_stride)
 593 {
 594    unsigned i, j;
 595
 596    for (i = 0; i < h; i++) {
 597       const float *pRow = p;
 598       for (j = 0; j < w; j++, pRow += 4) {
 599          unsigned a;
 600          a = float_to_ubyte(pRow[3]);
 601          *dst++ = (ubyte) a;
 602       }
 603       p += src_stride;
 604    }
 605 }
 606
 607
 608
 609 /*** PIPE_FORMAT_R16_SNORM ***/
 610
 611 static void
 612 r16_get_tile_rgba(const short *src,
 613                   unsigned w, unsigned h,
 614                   float *p,
 615                   unsigned dst_stride)
 616 {
 617    unsigned i, j;
 618
 619    for (i = 0; i < h; i++) {
 620       float *pRow = p;
 621       for (j = 0; j < w; j++, src++, pRow += 4) {
 622          pRow[0] = SHORT_TO_FLOAT(src[0]);
 623          pRow[1] =
 624          pRow[2] = 0.0;
 625          pRow[3] = 1.0;
 626       }
 627       p += dst_stride;
 628    }
 629 }
 630
 631
 632 static void
 633 r16_put_tile_rgba(short *dst,
 634                   unsigned w, unsigned h,
 635                   const float *p,
 636                   unsigned src_stride)
 637 {
 638    unsigned i, j;
 639
 640    for (i = 0; i < h; i++) {
 641       const float *pRow = p;
 642       for (j = 0; j < w; j++, dst++, pRow += 4) {
 643          UNCLAMPED_FLOAT_TO_SHORT(dst[0], pRow[0]);
 644       }
 645       p += src_stride;
 646    }
 647 }
 648
 649
 650 /*** PIPE_FORMAT_R16G16B16A16_SNORM ***/
 651
 652 static void
 653 r16g16b16a16_get_tile_rgba(const short *src,
 654                            unsigned w, unsigned h,
 655                            float *p,
 656                            unsigned dst_stride)
 657 {
 658    unsigned i, j;
 659
 660    for (i = 0; i < h; i++) {
 661       float *pRow = p;
 662       for (j = 0; j < w; j++, src += 4, pRow += 4) {
 663          pRow[0] = SHORT_TO_FLOAT(src[0]);
 664          pRow[1] = SHORT_TO_FLOAT(src[1]);
 665          pRow[2] = SHORT_TO_FLOAT(src[2]);
 666          pRow[3] = SHORT_TO_FLOAT(src[3]);
 667       }
 668       p += dst_stride;
 669    }
 670 }
 671
 672
 673 static void
 674 r16g16b16a16_put_tile_rgba(short *dst,
 675                            unsigned w, unsigned h,
 676                            const float *p,
 677                            unsigned src_stride)
 678 {
 679    unsigned i, j;
 680
 681    for (i = 0; i < h; i++) {
 682       const float *pRow = p;
 683       for (j = 0; j < w; j++, dst += 4, pRow += 4) {
 684          UNCLAMPED_FLOAT_TO_SHORT(dst[0], pRow[0]);
 685          UNCLAMPED_FLOAT_TO_SHORT(dst[1], pRow[1]);
 686          UNCLAMPED_FLOAT_TO_SHORT(dst[2], pRow[2]);
 687          UNCLAMPED_FLOAT_TO_SHORT(dst[3], pRow[3]);
 688       }
 689       p += src_stride;
 690    }
 691 }
 692
 693
 694 /*** PIPE_FORMAT_A8B8G8R8_SRGB ***/
 695
 696 /**
 697  * Convert an 8-bit sRGB value from non-linear space to a
 698  * linear RGB value in [0, 1].
 699  * Implemented with a 256-entry lookup table.
 700  */
 701 static INLINE float
 702 srgb_to_linear(ubyte cs8)
 703 {
 704    static float table[256];
 705    static boolean tableReady = FALSE;
 706    if (!tableReady) {
 707       /* compute lookup table now */
 708       uint i;
 709       for (i = 0; i < 256; i++) {
 710          const float cs = ubyte_to_float(i);
 711          if (cs <= 0.04045) {
 712             table[i] = cs / 12.92f;
 713          }
 714          else {
 715             table[i] = (float) powf((cs + 0.055) / 1.055, 2.4);
 716          }
 717       }
 718       tableReady = TRUE;
 719    }
 720    return table[cs8];
 721 }
 722
 723
 724 /**
 725  * Convert linear float in [0,1] to an srgb ubyte value in [0,255].
 726  * XXX this hasn't been tested (render to srgb surface).
 727  * XXX this needs optimization.
 728  */
 729 static INLINE ubyte
 730 linear_to_srgb(float cl)
 731 {
 732    if (cl >= 1.0F)
 733       return 255;
 734    else if (cl >= 0.0031308F)
 735       return float_to_ubyte(1.055F * powf(cl, 0.41666F) - 0.055F);
 736    else if (cl > 0.0F)
 737       return float_to_ubyte(12.92F * cl);
 738    else
 739       return 0.0;
 740 }
 741
 742
 743 static void
 744 a8r8g8b8_srgb_get_tile_rgba(const unsigned *src,
 745                             unsigned w, unsigned h,
 746                             float *p,
 747                             unsigned dst_stride)
 748 {
 749    unsigned i, j;
 750
 751    for (i = 0; i < h; i++) {
 752       float *pRow = p;
 753       for (j = 0; j < w; j++, pRow += 4) {
 754          const unsigned pixel = *src++;
 755          pRow[0] = srgb_to_linear((pixel >> 16) & 0xff);
 756          pRow[1] = srgb_to_linear((pixel >>  8) & 0xff);
 757          pRow[2] = srgb_to_linear((pixel >>  0) & 0xff);
 758          pRow[3] = ubyte_to_float((pixel >> 24) & 0xff);
 759       }
 760       p += dst_stride;
 761    }
 762 }
 763
 764 static void
 765 a8r8g8b8_srgb_put_tile_rgba(unsigned *dst,
 766                             unsigned w, unsigned h,
 767                             const float *p,
 768                             unsigned src_stride)
 769 {
 770    unsigned i, j;
 771
 772    for (i = 0; i < h; i++) {
 773       const float *pRow = p;
 774       for (j = 0; j < w; j++, pRow += 4) {
 775          unsigned r, g, b, a;
 776          r = linear_to_srgb(pRow[0]);
 777          g = linear_to_srgb(pRow[1]);
 778          b = linear_to_srgb(pRow[2]);
 779          a = float_to_ubyte(pRow[3]);
 780          *dst++ = (a << 24) | (r << 16) | (g << 8) | b;
 781       }
 782       p += src_stride;
 783    }
 784 }
 785
 786
 787 /*** PIPE_FORMAT_L8A8_SRGB ***/
 788
 789 static void
 790 a8l8_srgb_get_tile_rgba(const ushort *src,
 791                         unsigned w, unsigned h,
 792                         float *p,
 793                         unsigned dst_stride)
 794 {
 795    unsigned i, j;
 796
 797    for (i = 0; i < h; i++) {
 798       float *pRow = p;
 799       for (j = 0; j < w; j++, pRow += 4) {
 800          ushort p = *src++;
 801          pRow[0] =
 802          pRow[1] =
 803          pRow[2] = srgb_to_linear(p & 0xff);
 804          pRow[3] = ubyte_to_float(p >> 8);
 805       }
 806       p += dst_stride;
 807    }
 808 }
 809
 810 static void
 811 a8l8_srgb_put_tile_rgba(ushort *dst,
 812                         unsigned w, unsigned h,
 813                         const float *p,
 814                         unsigned src_stride)
 815 {
 816    unsigned i, j;
 817
 818    for (i = 0; i < h; i++) {
 819       const float *pRow = p;
 820       for (j = 0; j < w; j++, pRow += 4) {
 821          unsigned r, a;
 822          r = linear_to_srgb(pRow[0]);
 823          a = float_to_ubyte(pRow[3]);
 824          *dst++ = (a << 8) | r;
 825       }
 826       p += src_stride;
 827    }
 828 }
 829
 830
 831 /*** PIPE_FORMAT_L8_SRGB ***/
 832
 833 static void
 834 l8_srgb_get_tile_rgba(const ubyte *src,
 835                       unsigned w, unsigned h,
 836                       float *p,
 837                       unsigned dst_stride)
 838 {
 839    unsigned i, j;
 840
 841    for (i = 0; i < h; i++) {
 842       float *pRow = p;
 843       for (j = 0; j < w; j++, src++, pRow += 4) {
 844          pRow[0] =
 845          pRow[1] =
 846          pRow[2] = srgb_to_linear(*src);
 847          pRow[3] = 1.0;
 848       }
 849       p += dst_stride;
 850    }
 851 }
 852
 853 static void
 854 l8_srgb_put_tile_rgba(ubyte *dst,
 855                       unsigned w, unsigned h,
 856                       const float *p,
 857                       unsigned src_stride)
 858 {
 859    unsigned i, j;
 860
 861    for (i = 0; i < h; i++) {
 862       const float *pRow = p;
 863       for (j = 0; j < w; j++, pRow += 4) {
 864          unsigned r;
 865          r = linear_to_srgb(pRow[0]);
 866          *dst++ = (ubyte) r;
 867       }
 868       p += src_stride;
 869    }
 870 }
 871
 872
 873 /*** PIPE_FORMAT_I8_UNORM ***/
 874
 875 static void
 876 i8_get_tile_rgba(const ubyte *src,
 877                  unsigned w, unsigned h,
 878                  float *p,
 879                  unsigned dst_stride)
 880 {
 881    unsigned i, j;
 882
 883    for (i = 0; i < h; i++) {
 884       float *pRow = p;
 885       for (j = 0; j < w; j++, src++, pRow += 4) {
 886          pRow[0] =
 887          pRow[1] =
 888          pRow[2] =
 889          pRow[3] = ubyte_to_float(*src);
 890       }
 891       p += dst_stride;
 892    }
 893 }
 894
 895
 896 static void
 897 i8_put_tile_rgba(ubyte *dst,
 898                  unsigned w, unsigned h,
 899                  const float *p,
 900                  unsigned src_stride)
 901 {
 902    unsigned i, j;
 903
 904    for (i = 0; i < h; i++) {
 905       const float *pRow = p;
 906       for (j = 0; j < w; j++, pRow += 4) {
 907          unsigned r;
 908          r = float_to_ubyte(pRow[0]);
 909          *dst++ = (ubyte) r;
 910       }
 911       p += src_stride;
 912    }
 913 }
 914
 915
 916 /*** PIPE_FORMAT_L8A8_UNORM ***/
 917
 918 static void
 919 a8l8_get_tile_rgba(const ushort *src,
 920                    unsigned w, unsigned h,
 921                    float *p,
 922                    unsigned dst_stride)
 923 {
 924    unsigned i, j;
 925
 926    for (i = 0; i < h; i++) {
 927       float *pRow = p;
 928       for (j = 0; j < w; j++, pRow += 4) {
 929          ushort p = *src++;
 930          pRow[0] =
 931          pRow[1] =
 932          pRow[2] = ubyte_to_float(p & 0xff);
 933          pRow[3] = ubyte_to_float(p >> 8);
 934       }
 935       p += dst_stride;
 936    }
 937 }
 938
 939
 940 static void
 941 a8l8_put_tile_rgba(ushort *dst,
 942                    unsigned w, unsigned h,
 943                    const float *p,
 944                    unsigned src_stride)
 945 {
 946    unsigned i, j;
 947
 948    for (i = 0; i < h; i++) {
 949       const float *pRow = p;
 950       for (j = 0; j < w; j++, pRow += 4) {
 951          unsigned r, a;
 952          r = float_to_ubyte(pRow[0]);
 953          a = float_to_ubyte(pRow[3]);
 954          *dst++ = (a << 8) | r;
 955       }
 956       p += src_stride;
 957    }
 958 }
 959
 960
 961
 962
 963 /*** PIPE_FORMAT_Z32_UNORM ***/
 964
 965 /**
 966  * Return each Z value as four floats in [0,1].
 967  */
 968 static void
 969 z32_get_tile_rgba(const unsigned *src,
 970                   unsigned w, unsigned h,
 971                   float *p,
 972                   unsigned dst_stride)
 973 {
 974    const double scale = 1.0 / (double) 0xffffffff;
 975    unsigned i, j;
 976
 977    for (i = 0; i < h; i++) {
 978       float *pRow = p;
 979       for (j = 0; j < w; j++, pRow += 4) {
 980          pRow[0] =
 981          pRow[1] =
 982          pRow[2] =
 983          pRow[3] = (float) (*src++ * scale);
 984       }
 985       p += dst_stride;
 986    }
 987 }
 988
 989
 990 /*** PIPE_FORMAT_Z24S8_UNORM ***/
 991
 992 /**
 993  * Return Z component as four float in [0,1].  Stencil part ignored.
 994  */
 995 static void
 996 s8z24_get_tile_rgba(const unsigned *src,
 997                     unsigned w, unsigned h,
 998                     float *p,
 999                     unsigned dst_stride)
1000 {
1001    const double scale = 1.0 / ((1 << 24) - 1);
1002    unsigned i, j;
1003
1004    for (i = 0; i < h; i++) {
1005       float *pRow = p;
1006       for (j = 0; j < w; j++, pRow += 4) {
1007          pRow[0] =
1008          pRow[1] =
1009          pRow[2] =
1010          pRow[3] = (float) (scale * (*src++ & 0xffffff));
1011       }
1012       p += dst_stride;
1013    }
1014 }
1015
1016
1017 /*** PIPE_FORMAT_S8Z24_UNORM ***/
1018
1019 /**
1020  * Return Z component as four float in [0,1].  Stencil part ignored.
1021  */
1022 static void
1023 z24s8_get_tile_rgba(const unsigned *src,
1024                     unsigned w, unsigned h,
1025                     float *p,
1026                     unsigned dst_stride)
1027 {
1028    const double scale = 1.0 / ((1 << 24) - 1);
1029    unsigned i, j;
1030
1031    for (i = 0; i < h; i++) {
1032       float *pRow = p;
1033       for (j = 0; j < w; j++, pRow += 4) {
1034          pRow[0] =
1035          pRow[1] =
1036          pRow[2] =
1037          pRow[3] = (float) (scale * (*src++ >> 8));
1038       }
1039       p += dst_stride;
1040    }
1041 }
1042
1043
1044 /*** PIPE_FORMAT_Z32_FLOAT ***/
1045
1046 /**
1047  * Return each Z value as four floats in [0,1].
1048  */
1049 static void
1050 z32f_get_tile_rgba(const float *src,
1051                    unsigned w, unsigned h,
1052                    float *p,
1053                    unsigned dst_stride)
1054 {
1055    unsigned i, j;
1056
1057    for (i = 0; i < h; i++) {
1058       float *pRow = p;
1059       for (j = 0; j < w; j++, pRow += 4) {
1060          pRow[0] =
1061          pRow[1] =
1062          pRow[2] =
1063          pRow[3] = *src++;
1064       }
1065       p += dst_stride;
1066    }
1067 }
1068
1069
1070 /*** PIPE_FORMAT_UYVY / PIPE_FORMAT_YUYV ***/
1071
1072 /**
1073  * Convert YCbCr (or YCrCb) to RGBA.
1074  */
1075 static void
1076 ycbcr_get_tile_rgba(const ushort *src,
1077                     unsigned w, unsigned h,
1078                     float *p,
1079                     unsigned dst_stride,
1080                     boolean rev)
1081 {
1082    const float scale = 1.0f / 255.0f;
1083    unsigned i, j;
1084
1085    for (i = 0; i < h; i++) {
1086       float *pRow = p;
1087       /* do two texels at a time */
1088       for (j = 0; j < (w & ~1); j += 2, src += 2) {
1089          const ushort t0 = src[0];
1090          const ushort t1 = src[1];
1091          const ubyte y0 = (t0 >> 8) & 0xff;  /* luminance */
1092          const ubyte y1 = (t1 >> 8) & 0xff;  /* luminance */
1093          ubyte cb, cr;
1094          float r, g, b;
1095
1096          if (rev) {
1097             cb = t1 & 0xff;         /* chroma U */
1098             cr = t0 & 0xff;         /* chroma V */
1099          }
1100          else {
1101             cb = t0 & 0xff;         /* chroma U */
1102             cr = t1 & 0xff;         /* chroma V */
1103          }
1104
1105          /* even pixel: y0,cr,cb */
1106          r = 1.164f * (y0-16) + 1.596f * (cr-128);
1107          g = 1.164f * (y0-16) - 0.813f * (cr-128) - 0.391f * (cb-128);
1108          b = 1.164f * (y0-16) + 2.018f * (cb-128);
1109          pRow[0] = r * scale;
1110          pRow[1] = g * scale;
1111          pRow[2] = b * scale;
1112          pRow[3] = 1.0f;
1113          pRow += 4;
1114
1115          /* odd pixel: use y1,cr,cb */
1116          r = 1.164f * (y1-16) + 1.596f * (cr-128);
1117          g = 1.164f * (y1-16) - 0.813f * (cr-128) - 0.391f * (cb-128);
1118          b = 1.164f * (y1-16) + 2.018f * (cb-128);
1119          pRow[0] = r * scale;
1120          pRow[1] = g * scale;
1121          pRow[2] = b * scale;
1122          pRow[3] = 1.0f;
1123          pRow += 4;
1124
1125       }
1126       /* do the last texel */
1127       if (w & 1) {
1128          const ushort t0 = src[0];
1129          const ushort t1 = src[1];
1130          const ubyte y0 = (t0 >> 8) & 0xff;  /* luminance */
1131          ubyte cb, cr;
1132          float r, g, b;
1133
1134          if (rev) {
1135             cb = t1 & 0xff;         /* chroma U */
1136             cr = t0 & 0xff;         /* chroma V */
1137          }
1138          else {
1139             cb = t0 & 0xff;         /* chroma U */
1140             cr = t1 & 0xff;         /* chroma V */
1141          }
1142
1143          /* even pixel: y0,cr,cb */
1144          r = 1.164f * (y0-16) + 1.596f * (cr-128);
1145          g = 1.164f * (y0-16) - 0.813f * (cr-128) - 0.391f * (cb-128);
1146          b = 1.164f * (y0-16) + 2.018f * (cb-128);
1147          pRow[0] = r * scale;
1148          pRow[1] = g * scale;
1149          pRow[2] = b * scale;
1150          pRow[3] = 1.0f;
1151          pRow += 4;
1152       }
1153       p += dst_stride;
1154    }
1155 }
1156
1157
1158 void
1159 pipe_tile_raw_to_rgba(enum pipe_format format,
1160                       void *src,
1161                       uint w, uint h,
1162                       float *dst, unsigned dst_stride)
1163 {
1164    switch (format) {
1165    case PIPE_FORMAT_B8G8R8A8_UNORM:
1166       a8r8g8b8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1167       break;
1168    case PIPE_FORMAT_B8G8R8X8_UNORM:
1169       x8r8g8b8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1170       break;
1171    case PIPE_FORMAT_A8R8G8B8_UNORM:
1172       b8g8r8a8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1173       break;
1174    case PIPE_FORMAT_A8B8G8R8_UNORM:
1175       r8g8b8a8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1176       break;
1177    case PIPE_FORMAT_B5G5R5A1_UNORM:
1178       a1r5g5b5_get_tile_rgba((ushort *) src, w, h, dst, dst_stride);
1179       break;
1180    case PIPE_FORMAT_B4G4R4A4_UNORM:
1181       a4r4g4b4_get_tile_rgba((ushort *) src, w, h, dst, dst_stride);
1182       break;
1183    case PIPE_FORMAT_B5G6R5_UNORM:
1184       r5g6b5_get_tile_rgba((ushort *) src, w, h, dst, dst_stride);
1185       break;
1186    case PIPE_FORMAT_R8G8B8_UNORM:
1187       r8g8b8_get_tile_rgba((ubyte *) src, w, h, dst, dst_stride);
1188       break;
1189    case PIPE_FORMAT_L8_UNORM:
1190       l8_get_tile_rgba((ubyte *) src, w, h, dst, dst_stride);
1191       break;
1192    case PIPE_FORMAT_A8_UNORM:
1193       a8_get_tile_rgba((ubyte *) src, w, h, dst, dst_stride);
1194       break;
1195    case PIPE_FORMAT_I8_UNORM:
1196       i8_get_tile_rgba((ubyte *) src, w, h, dst, dst_stride);
1197       break;
1198    case PIPE_FORMAT_L8A8_UNORM:
1199       a8l8_get_tile_rgba((ushort *) src, w, h, dst, dst_stride);
1200       break;
1201    case PIPE_FORMAT_R16_SNORM:
1202       r16_get_tile_rgba((short *) src, w, h, dst, dst_stride);
1203       break;
1204    case PIPE_FORMAT_R16G16B16A16_SNORM:
1205       r16g16b16a16_get_tile_rgba((short *) src, w, h, dst, dst_stride);
1206       break;
1207    case PIPE_FORMAT_B8G8R8A8_SRGB:
1208       a8r8g8b8_srgb_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1209       break;
1210    case PIPE_FORMAT_L8A8_SRGB:
1211       a8l8_srgb_get_tile_rgba((ushort *) src, w, h, dst, dst_stride);
1212       break;
1213    case PIPE_FORMAT_L8_SRGB:
1214       l8_srgb_get_tile_rgba((ubyte *) src, w, h, dst, dst_stride);
1215       break;
1216    case PIPE_FORMAT_Z16_UNORM:
1217       z16_get_tile_rgba((ushort *) src, w, h, dst, dst_stride);
1218       break;
1219    case PIPE_FORMAT_Z32_UNORM:
1220       z32_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1221       break;
1222    case PIPE_FORMAT_Z24S8_UNORM:
1223    case PIPE_FORMAT_Z24X8_UNORM:
1224       s8z24_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1225       break;
1226    case PIPE_FORMAT_S8Z24_UNORM:
1227    case PIPE_FORMAT_X8Z24_UNORM:
1228       z24s8_get_tile_rgba((unsigned *) src, w, h, dst, dst_stride);
1229       break;
1230    case PIPE_FORMAT_Z32_FLOAT:
1231       z32f_get_tile_rgba((float *) src, w, h, dst, dst_stride);
1232       break;
1233    case PIPE_FORMAT_UYVY:
1234       ycbcr_get_tile_rgba((ushort *) src, w, h, dst, dst_stride, FALSE);
1235       break;
1236    case PIPE_FORMAT_YUYV:
1237       ycbcr_get_tile_rgba((ushort *) src, w, h, dst, dst_stride, TRUE);
1238       break;
1239    default:
1240       util_format_read_4f(format,
1241                           dst, dst_stride * sizeof(float),
1242                           src, util_format_get_stride(format, w),
1243                           0, 0, w, h);
1244    }
1245 }
1246
1247
1248 void
1249 pipe_get_tile_rgba(struct pipe_transfer *pt,
1250                    uint x, uint y, uint w, uint h,
1251                    float *p)
1252 {
1253    unsigned dst_stride = w * 4;
1254    void *packed;
1255    enum pipe_format format = pt->texture->format;
1256
1257    if (pipe_clip_tile(x, y, &w, &h, pt))
1258       return;
1259
1260    packed = MALLOC(util_format_get_nblocks(format, w, h) * util_format_get_blocksize(format));
1261
1262    if (!packed)
1263       return;
1264
1265    if(format == PIPE_FORMAT_UYVY || format == PIPE_FORMAT_YUYV)
1266       assert((x & 1) == 0);
1267
1268    pipe_get_tile_raw(pt, x, y, w, h, packed, 0);
1269
1270    pipe_tile_raw_to_rgba(format, packed, w, h, p, dst_stride);
1271
1272    FREE(packed);
1273 }
1274
1275
1276 void
1277 pipe_put_tile_rgba(struct pipe_transfer *pt,
1278                    uint x, uint y, uint w, uint h,
1279                    const float *p)
1280 {
1281    unsigned src_stride = w * 4;
1282    void *packed;
1283    enum pipe_format format = pt->texture->format;
1284
1285    if (pipe_clip_tile(x, y, &w, &h, pt))
1286       return;
1287
1288    packed = MALLOC(util_format_get_nblocks(format, w, h) * util_format_get_blocksize(format));
1289
1290    if (!packed)
1291       return;
1292
1293    switch (format) {
1294    case PIPE_FORMAT_B8G8R8A8_UNORM:
1295       a8r8g8b8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
1296       break;
1297    case PIPE_FORMAT_B8G8R8X8_UNORM:
1298       x8r8g8b8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
1299       break;
1300    case PIPE_FORMAT_A8R8G8B8_UNORM:
1301       b8g8r8a8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
1302       break;
1303    case PIPE_FORMAT_A8B8G8R8_UNORM:
1304       r8g8b8a8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
1305       break;
1306    case PIPE_FORMAT_B5G5R5A1_UNORM:
1307       a1r5g5b5_put_tile_rgba((ushort *) packed, w, h, p, src_stride);
1308       break;
1309    case PIPE_FORMAT_B5G6R5_UNORM:
1310       r5g6b5_put_tile_rgba((ushort *) packed, w, h, p, src_stride);
1311       break;
1312    case PIPE_FORMAT_R8G8B8_UNORM:
1313       r8g8b8_put_tile_rgba((ubyte *) packed, w, h, p, src_stride);
1314       break;
1315    case PIPE_FORMAT_B4G4R4A4_UNORM:
1316       a4r4g4b4_put_tile_rgba((ushort *) packed, w, h, p, src_stride);
1317       break;
1318    case PIPE_FORMAT_L8_UNORM:
1319       l8_put_tile_rgba((ubyte *) packed, w, h, p, src_stride);
1320       break;
1321    case PIPE_FORMAT_A8_UNORM:
1322       a8_put_tile_rgba((ubyte *) packed, w, h, p, src_stride);
1323       break;
1324    case PIPE_FORMAT_I8_UNORM:
1325       i8_put_tile_rgba((ubyte *) packed, w, h, p, src_stride);
1326       break;
1327    case PIPE_FORMAT_L8A8_UNORM:
1328       a8l8_put_tile_rgba((ushort *) packed, w, h, p, src_stride);
1329       break;
1330    case PIPE_FORMAT_R16_SNORM:
1331       r16_put_tile_rgba((short *) packed, w, h, p, src_stride);
1332       break;
1333    case PIPE_FORMAT_R16G16B16A16_SNORM:
1334       r16g16b16a16_put_tile_rgba((short *) packed, w, h, p, src_stride);
1335       break;
1336    case PIPE_FORMAT_B8G8R8A8_SRGB:
1337       a8r8g8b8_srgb_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);
1338       break;
1339    case PIPE_FORMAT_L8A8_SRGB:
1340       a8l8_srgb_put_tile_rgba((ushort *) packed, w, h, p, src_stride);
1341       break;
1342    case PIPE_FORMAT_L8_SRGB:
1343       l8_srgb_put_tile_rgba((ubyte *) packed, w, h, p, src_stride);
1344       break;
1345    case PIPE_FORMAT_Z16_UNORM:
1346       /*z16_put_tile_rgba((ushort *) packed, w, h, p, src_stride);*/
1347       break;
1348    case PIPE_FORMAT_Z32_UNORM:
1349       /*z32_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);*/
1350       break;
1351    case PIPE_FORMAT_Z24S8_UNORM:
1352    case PIPE_FORMAT_Z24X8_UNORM:
1353       /*s8z24_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);*/
1354       break;
1355    case PIPE_FORMAT_S8Z24_UNORM:
1356    case PIPE_FORMAT_X8Z24_UNORM:
1357       /*z24s8_put_tile_rgba((unsigned *) packed, w, h, p, src_stride);*/
1358       break;
1359    default:
1360       util_format_write_4f(format,
1361                            p, src_stride * sizeof(float),
1362                            packed, util_format_get_stride(format, w),
1363                            0, 0, w, h);
1364    }
1365
1366    pipe_put_tile_raw(pt, x, y, w, h, packed, 0);
1367
1368    FREE(packed);
1369 }
1370
1371
1372 /**
1373  * Get a block of Z values, converted to 32-bit range.
1374  */
1375 void
1376 pipe_get_tile_z(struct pipe_transfer *pt,
1377                 uint x, uint y, uint w, uint h,
1378                 uint *z)
1379 {
1380    struct pipe_screen *screen = pt->texture->screen;
1381    const uint dstStride = w;
1382    ubyte *map;
1383    uint *pDest = z;
1384    uint i, j;
1385    enum pipe_format format = pt->texture->format;
1386
1387    if (pipe_clip_tile(x, y, &w, &h, pt))
1388       return;
1389
1390    map = (ubyte *)screen->transfer_map(screen, pt);
1391    if (!map) {
1392       assert(0);
1393       return;
1394    }
1395
1396    switch (format) {
1397    case PIPE_FORMAT_Z32_UNORM:
1398       {
1399          const uint *ptrc
1400             = (const uint *)(map  + y * pt->stride + x*4);
1401          for (i = 0; i < h; i++) {
1402             memcpy(pDest, ptrc, 4 * w);
1403             pDest += dstStride;
1404             ptrc += pt->stride/4;
1405          }
1406       }
1407       break;
1408    case PIPE_FORMAT_Z24S8_UNORM:
1409    case PIPE_FORMAT_Z24X8_UNORM:
1410       {
1411          const uint *ptrc
1412             = (const uint *)(map + y * pt->stride + x*4);
1413          for (i = 0; i < h; i++) {
1414             for (j = 0; j < w; j++) {
1415                /* convert 24-bit Z to 32-bit Z */
1416                pDest[j] = (ptrc[j] << 8) | ((ptrc[j] >> 16) & 0xff);
1417             }
1418             pDest += dstStride;
1419             ptrc += pt->stride/4;
1420          }
1421       }
1422       break;
1423    case PIPE_FORMAT_S8Z24_UNORM:
1424    case PIPE_FORMAT_X8Z24_UNORM:
1425       {
1426          const uint *ptrc
1427             = (const uint *)(map + y * pt->stride + x*4);
1428          for (i = 0; i < h; i++) {
1429             for (j = 0; j < w; j++) {
1430                /* convert 24-bit Z to 32-bit Z */
1431                pDest[j] = (ptrc[j] & 0xffffff00) | ((ptrc[j] >> 24) & 0xff);
1432             }
1433             pDest += dstStride;
1434             ptrc += pt->stride/4;
1435          }
1436       }
1437       break;
1438    case PIPE_FORMAT_Z16_UNORM:
1439       {
1440          const ushort *ptrc
1441             = (const ushort *)(map + y * pt->stride + x*2);
1442          for (i = 0; i < h; i++) {
1443             for (j = 0; j < w; j++) {
1444                /* convert 16-bit Z to 32-bit Z */
1445                pDest[j] = (ptrc[j] << 16) | ptrc[j];
1446             }
1447             pDest += dstStride;
1448             ptrc += pt->stride/2;
1449          }
1450       }
1451       break;
1452    default:
1453       assert(0);
1454    }
1455
1456    screen->transfer_unmap(screen, pt);
1457 }
1458
1459
1460 void
1461 pipe_put_tile_z(struct pipe_transfer *pt,
1462                 uint x, uint y, uint w, uint h,
1463                 const uint *zSrc)
1464 {
1465    struct pipe_screen *screen = pt->texture->screen;
1466    const uint srcStride = w;
1467    const uint *ptrc = zSrc;
1468    ubyte *map;
1469    uint i, j;
1470    enum pipe_format format = pt->texture->format;
1471
1472    if (pipe_clip_tile(x, y, &w, &h, pt))
1473       return;
1474
1475    map = (ubyte *)screen->transfer_map(screen, pt);
1476    if (!map) {
1477       assert(0);
1478       return;
1479    }
1480
1481    switch (format) {
1482    case PIPE_FORMAT_Z32_UNORM:
1483       {
1484          uint *pDest = (uint *) (map + y * pt->stride + x*4);
1485          for (i = 0; i < h; i++) {
1486             memcpy(pDest, ptrc, 4 * w);
1487             pDest += pt->stride/4;
1488             ptrc += srcStride;
1489          }
1490       }
1491       break;
1492    case PIPE_FORMAT_Z24S8_UNORM:
1493       {
1494          uint *pDest = (uint *) (map + y * pt->stride + x*4);
1495          assert((pt->usage & PIPE_TRANSFER_READ_WRITE) == PIPE_TRANSFER_READ_WRITE);
1496          for (i = 0; i < h; i++) {
1497             for (j = 0; j < w; j++) {
1498                /* convert 32-bit Z to 24-bit Z, preserve stencil */
1499                pDest[j] = (pDest[j] & 0xff000000) | ptrc[j] >> 8;
1500             }
1501             pDest += pt->stride/4;
1502             ptrc += srcStride;
1503          }
1504       }
1505       break;
1506    case PIPE_FORMAT_Z24X8_UNORM:
1507       {
1508          uint *pDest = (uint *) (map + y * pt->stride + x*4);
1509          for (i = 0; i < h; i++) {
1510             for (j = 0; j < w; j++) {
1511                /* convert 32-bit Z to 24-bit Z (0 stencil) */
1512                pDest[j] = ptrc[j] >> 8;
1513             }
1514             pDest += pt->stride/4;
1515             ptrc += srcStride;
1516          }
1517       }
1518       break;
1519    case PIPE_FORMAT_S8Z24_UNORM:
1520       {
1521          uint *pDest = (uint *) (map + y * pt->stride + x*4);
1522          assert((pt->usage & PIPE_TRANSFER_READ_WRITE) == PIPE_TRANSFER_READ_WRITE);
1523          for (i = 0; i < h; i++) {
1524             for (j = 0; j < w; j++) {
1525                /* convert 32-bit Z to 24-bit Z, preserve stencil */
1526                pDest[j] = (pDest[j] & 0xff) | (ptrc[j] & 0xffffff00);
1527             }
1528             pDest += pt->stride/4;
1529             ptrc += srcStride;
1530          }
1531       }
1532       break;
1533    case PIPE_FORMAT_X8Z24_UNORM:
1534       {
1535          uint *pDest = (uint *) (map + y * pt->stride + x*4);
1536          for (i = 0; i < h; i++) {
1537             for (j = 0; j < w; j++) {
1538                /* convert 32-bit Z to 24-bit Z (0 stencil) */
1539                pDest[j] = ptrc[j] & 0xffffff00;
1540             }
1541             pDest += pt->stride/4;
1542             ptrc += srcStride;
1543          }
1544       }
1545       break;
1546    case PIPE_FORMAT_Z16_UNORM:
1547       {
1548          ushort *pDest = (ushort *) (map + y * pt->stride + x*2);
1549          for (i = 0; i < h; i++) {
1550             for (j = 0; j < w; j++) {
1551                /* convert 32-bit Z to 16-bit Z */
1552                pDest[j] = ptrc[j] >> 16;
1553             }
1554             pDest += pt->stride/2;
1555             ptrc += srcStride;
1556          }
1557       }
1558       break;
1559    default:
1560       assert(0);
1561    }
1562
1563    screen->transfer_unmap(screen, pt);
1564 }
1565
1566