src/mesa/swrast/s_texfetch.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.7
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (c) 2009  VMware, Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions 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 MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * \file s_texfetch.c
  29  *
  30  * Texel fetch/store functions
  31  *
  32  * \author Gareth Hughes
  33  */
  34
  35
  36 #include "main/colormac.h"
  37 #include "main/macros.h"
  38 #include "main/texcompress.h"
  39 #include "main/texcompress_fxt1.h"
  40 #include "main/texcompress_s3tc.h"
  41 #include "main/texcompress_rgtc.h"
  42 #include "main/texcompress_etc.h"
  43 #include "main/teximage.h"
  44 #include "main/samplerobj.h"
  45 #include "s_context.h"
  46 #include "s_texfetch.h"
  47 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
  48 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
  49
  50
  51 /**
  52  * Convert an 8-bit sRGB value from non-linear space to a
  53  * linear RGB value in [0, 1].
  54  * Implemented with a 256-entry lookup table.
  55  */
  56 static inline GLfloat
  57 nonlinear_to_linear(GLubyte cs8)
  58 {
  59    static GLfloat table[256];
  60    static GLboolean tableReady = GL_FALSE;
  61    if (!tableReady) {
  62       /* compute lookup table now */
  63       GLuint i;
  64       for (i = 0; i < 256; i++) {
  65          const GLfloat cs = UBYTE_TO_FLOAT(i);
  66          if (cs <= 0.04045) {
  67             table[i] = cs / 12.92f;
  68          }
  69          else {
  70             table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
  71          }
  72       }
  73       tableReady = GL_TRUE;
  74    }
  75    return table[cs8];
  76 }
  77
  78
  79
  80 /* Texel fetch routines for all supported formats
  81  */
  82 #define DIM 1
  83 #include "s_texfetch_tmp.h"
  84
  85 #define DIM 2
  86 #include "s_texfetch_tmp.h"
  87
  88 #define DIM 3
  89 #include "s_texfetch_tmp.h"
  90
  91
  92 /**
  93  * All compressed texture texel fetching is done though this function.
  94  * Basically just call a core-Mesa texel fetch function.
  95  */
  96 static void
  97 fetch_compressed(const struct swrast_texture_image *swImage,
  98                  GLint i, GLint j, GLint k, GLfloat *texel)
  99 {
 100    swImage->FetchCompressedTexel(swImage->Map,
 101                                  swImage->ImageOffsets,
 102                                  swImage->RowStride,
 103                                  i, j, k, texel);
 104 }
 105
 106
 107
 108 /**
 109  * Null texel fetch function.
 110  *
 111  * Have to have this so the FetchTexel function pointer is never NULL.
 112  */
 113 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
 114                                GLint i, GLint j, GLint k, GLfloat *texel )
 115 {
 116    (void) texImage; (void) i; (void) j; (void) k;
 117    texel[RCOMP] = 0.0;
 118    texel[GCOMP] = 0.0;
 119    texel[BCOMP] = 0.0;
 120    texel[ACOMP] = 0.0;
 121    _mesa_warning(NULL, "fetch_null_texelf() called!");
 122 }
 123
 124
 125 /**
 126  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 127  * XXX this is somewhat temporary.
 128  */
 129 static struct {
 130    gl_format Name;
 131    FetchTexelFunc Fetch1D;
 132    FetchTexelFunc Fetch2D;
 133    FetchTexelFunc Fetch3D;
 134 }
 135 texfetch_funcs[] =
 136 {
 137    {
 138       MESA_FORMAT_NONE,
 139       fetch_null_texelf,
 140       fetch_null_texelf,
 141       fetch_null_texelf
 142    },
 143
 144    {
 145       MESA_FORMAT_RGBA8888,
 146       fetch_texel_1d_f_rgba8888,
 147       fetch_texel_2d_f_rgba8888,
 148       fetch_texel_3d_f_rgba8888
 149    },
 150    {
 151       MESA_FORMAT_RGBA8888_REV,
 152       fetch_texel_1d_f_rgba8888_rev,
 153       fetch_texel_2d_f_rgba8888_rev,
 154       fetch_texel_3d_f_rgba8888_rev
 155    },
 156    {
 157       MESA_FORMAT_ARGB8888,
 158       fetch_texel_1d_f_argb8888,
 159       fetch_texel_2d_f_argb8888,
 160       fetch_texel_3d_f_argb8888
 161    },
 162    {
 163       MESA_FORMAT_ARGB8888_REV,
 164       fetch_texel_1d_f_argb8888_rev,
 165       fetch_texel_2d_f_argb8888_rev,
 166       fetch_texel_3d_f_argb8888_rev
 167    },
 168    {
 169       MESA_FORMAT_RGBX8888,
 170       fetch_texel_1d_f_rgbx8888,
 171       fetch_texel_2d_f_rgbx8888,
 172       fetch_texel_3d_f_rgbx8888
 173    },
 174    {
 175       MESA_FORMAT_RGBX8888_REV,
 176       fetch_texel_1d_f_rgbx8888_rev,
 177       fetch_texel_2d_f_rgbx8888_rev,
 178       fetch_texel_3d_f_rgbx8888_rev
 179    },
 180    {
 181       MESA_FORMAT_XRGB8888,
 182       fetch_texel_1d_f_xrgb8888,
 183       fetch_texel_2d_f_xrgb8888,
 184       fetch_texel_3d_f_xrgb8888
 185    },
 186    {
 187       MESA_FORMAT_XRGB8888_REV,
 188       fetch_texel_1d_f_xrgb8888_rev,
 189       fetch_texel_2d_f_xrgb8888_rev,
 190       fetch_texel_3d_f_xrgb8888_rev
 191    },
 192    {
 193       MESA_FORMAT_RGB888,
 194       fetch_texel_1d_f_rgb888,
 195       fetch_texel_2d_f_rgb888,
 196       fetch_texel_3d_f_rgb888
 197    },
 198    {
 199       MESA_FORMAT_BGR888,
 200       fetch_texel_1d_f_bgr888,
 201       fetch_texel_2d_f_bgr888,
 202       fetch_texel_3d_f_bgr888
 203    },
 204    {
 205       MESA_FORMAT_RGB565,
 206       fetch_texel_1d_f_rgb565,
 207       fetch_texel_2d_f_rgb565,
 208       fetch_texel_3d_f_rgb565
 209    },
 210    {
 211       MESA_FORMAT_RGB565_REV,
 212       fetch_texel_1d_f_rgb565_rev,
 213       fetch_texel_2d_f_rgb565_rev,
 214       fetch_texel_3d_f_rgb565_rev
 215    },
 216    {
 217       MESA_FORMAT_ARGB4444,
 218       fetch_texel_1d_f_argb4444,
 219       fetch_texel_2d_f_argb4444,
 220       fetch_texel_3d_f_argb4444
 221    },
 222    {
 223       MESA_FORMAT_ARGB4444_REV,
 224       fetch_texel_1d_f_argb4444_rev,
 225       fetch_texel_2d_f_argb4444_rev,
 226       fetch_texel_3d_f_argb4444_rev
 227    },
 228    {
 229       MESA_FORMAT_RGBA5551,
 230       fetch_texel_1d_f_rgba5551,
 231       fetch_texel_2d_f_rgba5551,
 232       fetch_texel_3d_f_rgba5551
 233    },
 234    {
 235       MESA_FORMAT_ARGB1555,
 236       fetch_texel_1d_f_argb1555,
 237       fetch_texel_2d_f_argb1555,
 238       fetch_texel_3d_f_argb1555
 239    },
 240    {
 241       MESA_FORMAT_ARGB1555_REV,
 242       fetch_texel_1d_f_argb1555_rev,
 243       fetch_texel_2d_f_argb1555_rev,
 244       fetch_texel_3d_f_argb1555_rev
 245    },
 246    {
 247       MESA_FORMAT_AL44,
 248       fetch_texel_1d_f_al44,
 249       fetch_texel_2d_f_al44,
 250       fetch_texel_3d_f_al44
 251    },
 252    {
 253       MESA_FORMAT_AL88,
 254       fetch_texel_1d_f_al88,
 255       fetch_texel_2d_f_al88,
 256       fetch_texel_3d_f_al88
 257    },
 258    {
 259       MESA_FORMAT_AL88_REV,
 260       fetch_texel_1d_f_al88_rev,
 261       fetch_texel_2d_f_al88_rev,
 262       fetch_texel_3d_f_al88_rev
 263    },
 264    {
 265       MESA_FORMAT_AL1616,
 266       fetch_texel_1d_f_al1616,
 267       fetch_texel_2d_f_al1616,
 268       fetch_texel_3d_f_al1616
 269    },
 270    {
 271       MESA_FORMAT_AL1616_REV,
 272       fetch_texel_1d_f_al1616_rev,
 273       fetch_texel_2d_f_al1616_rev,
 274       fetch_texel_3d_f_al1616_rev
 275    },
 276    {
 277       MESA_FORMAT_RGB332,
 278       fetch_texel_1d_f_rgb332,
 279       fetch_texel_2d_f_rgb332,
 280       fetch_texel_3d_f_rgb332
 281    },
 282    {
 283       MESA_FORMAT_A8,
 284       fetch_texel_1d_f_a8,
 285       fetch_texel_2d_f_a8,
 286       fetch_texel_3d_f_a8
 287    },
 288    {
 289       MESA_FORMAT_A16,
 290       fetch_texel_1d_f_a16,
 291       fetch_texel_2d_f_a16,
 292       fetch_texel_3d_f_a16
 293    },
 294    {
 295       MESA_FORMAT_L8,
 296       fetch_texel_1d_f_l8,
 297       fetch_texel_2d_f_l8,
 298       fetch_texel_3d_f_l8
 299    },
 300    {
 301       MESA_FORMAT_L16,
 302       fetch_texel_1d_f_l16,
 303       fetch_texel_2d_f_l16,
 304       fetch_texel_3d_f_l16
 305    },
 306    {
 307       MESA_FORMAT_I8,
 308       fetch_texel_1d_f_i8,
 309       fetch_texel_2d_f_i8,
 310       fetch_texel_3d_f_i8
 311    },
 312    {
 313       MESA_FORMAT_I16,
 314       fetch_texel_1d_f_i16,
 315       fetch_texel_2d_f_i16,
 316       fetch_texel_3d_f_i16
 317    },
 318    {
 319       MESA_FORMAT_YCBCR,
 320       fetch_texel_1d_f_ycbcr,
 321       fetch_texel_2d_f_ycbcr,
 322       fetch_texel_3d_f_ycbcr
 323    },
 324    {
 325       MESA_FORMAT_YCBCR_REV,
 326       fetch_texel_1d_f_ycbcr_rev,
 327       fetch_texel_2d_f_ycbcr_rev,
 328       fetch_texel_3d_f_ycbcr_rev
 329    },
 330    {
 331       MESA_FORMAT_R8,
 332       fetch_texel_1d_f_r8,
 333       fetch_texel_2d_f_r8,
 334       fetch_texel_3d_f_r8
 335    },
 336    {
 337       MESA_FORMAT_GR88,
 338       fetch_texel_1d_f_gr88,
 339       fetch_texel_2d_f_gr88,
 340       fetch_texel_3d_f_gr88
 341    },
 342    {
 343       MESA_FORMAT_RG88,
 344       fetch_texel_1d_f_rg88,
 345       fetch_texel_2d_f_rg88,
 346       fetch_texel_3d_f_rg88
 347    },
 348    {
 349       MESA_FORMAT_R16,
 350       fetch_texel_1d_f_r16,
 351       fetch_texel_2d_f_r16,
 352       fetch_texel_3d_f_r16
 353    },
 354    {
 355       MESA_FORMAT_GR1616,
 356       fetch_texel_1d_f_rg1616,
 357       fetch_texel_2d_f_rg1616,
 358       fetch_texel_3d_f_rg1616
 359    },
 360    {
 361       MESA_FORMAT_RG1616,
 362       fetch_texel_1d_f_rg1616_rev,
 363       fetch_texel_2d_f_rg1616_rev,
 364       fetch_texel_3d_f_rg1616_rev
 365    },
 366    {
 367       MESA_FORMAT_ARGB2101010,
 368       fetch_texel_1d_f_argb2101010,
 369       fetch_texel_2d_f_argb2101010,
 370       fetch_texel_3d_f_argb2101010
 371    },
 372    {
 373       MESA_FORMAT_Z24_S8,
 374       fetch_texel_1d_f_z24_s8,
 375       fetch_texel_2d_f_z24_s8,
 376       fetch_texel_3d_f_z24_s8
 377    },
 378    {
 379       MESA_FORMAT_S8_Z24,
 380       fetch_texel_1d_f_s8_z24,
 381       fetch_texel_2d_f_s8_z24,
 382       fetch_texel_3d_f_s8_z24
 383    },
 384    {
 385       MESA_FORMAT_Z16,
 386       fetch_texel_1d_f_z16,
 387       fetch_texel_2d_f_z16,
 388       fetch_texel_3d_f_z16
 389    },
 390    {
 391       MESA_FORMAT_X8_Z24,
 392       fetch_texel_1d_f_s8_z24,
 393       fetch_texel_2d_f_s8_z24,
 394       fetch_texel_3d_f_s8_z24
 395    },
 396    {
 397       MESA_FORMAT_Z24_X8,
 398       fetch_texel_1d_f_z24_s8,
 399       fetch_texel_2d_f_z24_s8,
 400       fetch_texel_3d_f_z24_s8
 401    },
 402    {
 403       MESA_FORMAT_Z32,
 404       fetch_texel_1d_f_z32,
 405       fetch_texel_2d_f_z32,
 406       fetch_texel_3d_f_z32
 407    },
 408    {
 409       MESA_FORMAT_S8,
 410       NULL,
 411       NULL,
 412       NULL
 413    },
 414    {
 415       MESA_FORMAT_SRGB8,
 416       fetch_texel_1d_srgb8,
 417       fetch_texel_2d_srgb8,
 418       fetch_texel_3d_srgb8
 419    },
 420    {
 421       MESA_FORMAT_SRGBA8,
 422       fetch_texel_1d_srgba8,
 423       fetch_texel_2d_srgba8,
 424       fetch_texel_3d_srgba8
 425    },
 426    {
 427       MESA_FORMAT_SARGB8,
 428       fetch_texel_1d_sargb8,
 429       fetch_texel_2d_sargb8,
 430       fetch_texel_3d_sargb8
 431    },
 432    {
 433       MESA_FORMAT_SL8,
 434       fetch_texel_1d_sl8,
 435       fetch_texel_2d_sl8,
 436       fetch_texel_3d_sl8
 437    },
 438    {
 439       MESA_FORMAT_SLA8,
 440       fetch_texel_1d_sla8,
 441       fetch_texel_2d_sla8,
 442       fetch_texel_3d_sla8
 443    },
 444    {
 445       MESA_FORMAT_SRGB_DXT1,
 446       fetch_compressed,
 447       fetch_compressed,
 448       fetch_compressed
 449    },
 450    {
 451       MESA_FORMAT_SRGBA_DXT1,
 452       fetch_compressed,
 453       fetch_compressed,
 454       fetch_compressed
 455    },
 456    {
 457       MESA_FORMAT_SRGBA_DXT3,
 458       fetch_compressed,
 459       fetch_compressed,
 460       fetch_compressed
 461    },
 462    {
 463       MESA_FORMAT_SRGBA_DXT5,
 464       fetch_compressed,
 465       fetch_compressed,
 466       fetch_compressed
 467    },
 468
 469    {
 470       MESA_FORMAT_RGB_FXT1,
 471       fetch_compressed,
 472       fetch_compressed,
 473       fetch_compressed
 474    },
 475    {
 476       MESA_FORMAT_RGBA_FXT1,
 477       fetch_compressed,
 478       fetch_compressed,
 479       fetch_compressed
 480    },
 481    {
 482       MESA_FORMAT_RGB_DXT1,
 483       fetch_compressed,
 484       fetch_compressed,
 485       fetch_compressed
 486    },
 487    {
 488       MESA_FORMAT_RGBA_DXT1,
 489       fetch_compressed,
 490       fetch_compressed,
 491       fetch_compressed
 492    },
 493    {
 494       MESA_FORMAT_RGBA_DXT3,
 495       fetch_compressed,
 496       fetch_compressed,
 497       fetch_compressed
 498    },
 499    {
 500       MESA_FORMAT_RGBA_DXT5,
 501       fetch_compressed,
 502       fetch_compressed,
 503       fetch_compressed
 504    },
 505    {
 506       MESA_FORMAT_RGBA_FLOAT32,
 507       fetch_texel_1d_f_rgba_f32,
 508       fetch_texel_2d_f_rgba_f32,
 509       fetch_texel_3d_f_rgba_f32
 510    },
 511    {
 512       MESA_FORMAT_RGBA_FLOAT16,
 513       fetch_texel_1d_f_rgba_f16,
 514       fetch_texel_2d_f_rgba_f16,
 515       fetch_texel_3d_f_rgba_f16
 516    },
 517    {
 518       MESA_FORMAT_RGB_FLOAT32,
 519       fetch_texel_1d_f_rgb_f32,
 520       fetch_texel_2d_f_rgb_f32,
 521       fetch_texel_3d_f_rgb_f32
 522    },
 523    {
 524       MESA_FORMAT_RGB_FLOAT16,
 525       fetch_texel_1d_f_rgb_f16,
 526       fetch_texel_2d_f_rgb_f16,
 527       fetch_texel_3d_f_rgb_f16
 528    },
 529    {
 530       MESA_FORMAT_ALPHA_FLOAT32,
 531       fetch_texel_1d_f_alpha_f32,
 532       fetch_texel_2d_f_alpha_f32,
 533       fetch_texel_3d_f_alpha_f32
 534    },
 535    {
 536       MESA_FORMAT_ALPHA_FLOAT16,
 537       fetch_texel_1d_f_alpha_f16,
 538       fetch_texel_2d_f_alpha_f16,
 539       fetch_texel_3d_f_alpha_f16
 540    },
 541    {
 542       MESA_FORMAT_LUMINANCE_FLOAT32,
 543       fetch_texel_1d_f_luminance_f32,
 544       fetch_texel_2d_f_luminance_f32,
 545       fetch_texel_3d_f_luminance_f32
 546    },
 547    {
 548       MESA_FORMAT_LUMINANCE_FLOAT16,
 549       fetch_texel_1d_f_luminance_f16,
 550       fetch_texel_2d_f_luminance_f16,
 551       fetch_texel_3d_f_luminance_f16
 552    },
 553    {
 554       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 555       fetch_texel_1d_f_luminance_alpha_f32,
 556       fetch_texel_2d_f_luminance_alpha_f32,
 557       fetch_texel_3d_f_luminance_alpha_f32
 558    },
 559    {
 560       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 561       fetch_texel_1d_f_luminance_alpha_f16,
 562       fetch_texel_2d_f_luminance_alpha_f16,
 563       fetch_texel_3d_f_luminance_alpha_f16
 564    },
 565    {
 566       MESA_FORMAT_INTENSITY_FLOAT32,
 567       fetch_texel_1d_f_intensity_f32,
 568       fetch_texel_2d_f_intensity_f32,
 569       fetch_texel_3d_f_intensity_f32
 570    },
 571    {
 572       MESA_FORMAT_INTENSITY_FLOAT16,
 573       fetch_texel_1d_f_intensity_f16,
 574       fetch_texel_2d_f_intensity_f16,
 575       fetch_texel_3d_f_intensity_f16
 576    },
 577    {
 578       MESA_FORMAT_R_FLOAT32,
 579       fetch_texel_1d_f_r_f32,
 580       fetch_texel_2d_f_r_f32,
 581       fetch_texel_3d_f_r_f32
 582    },
 583    {
 584       MESA_FORMAT_R_FLOAT16,
 585       fetch_texel_1d_f_r_f16,
 586       fetch_texel_2d_f_r_f16,
 587       fetch_texel_3d_f_r_f16
 588    },
 589    {
 590       MESA_FORMAT_RG_FLOAT32,
 591       fetch_texel_1d_f_rg_f32,
 592       fetch_texel_2d_f_rg_f32,
 593       fetch_texel_3d_f_rg_f32
 594    },
 595    {
 596       MESA_FORMAT_RG_FLOAT16,
 597       fetch_texel_1d_f_rg_f16,
 598       fetch_texel_2d_f_rg_f16,
 599       fetch_texel_3d_f_rg_f16
 600    },
 601
 602    {
 603       MESA_FORMAT_ALPHA_UINT8,
 604       NULL,
 605       NULL,
 606       NULL
 607    },
 608
 609    {
 610       MESA_FORMAT_ALPHA_UINT16,
 611       NULL,
 612       NULL,
 613       NULL
 614    },
 615
 616    {
 617       MESA_FORMAT_ALPHA_UINT32,
 618       NULL,
 619       NULL,
 620       NULL
 621    },
 622
 623    {
 624       MESA_FORMAT_ALPHA_INT8,
 625       NULL,
 626       NULL,
 627       NULL
 628    },
 629
 630    {
 631       MESA_FORMAT_ALPHA_INT16,
 632       NULL,
 633       NULL,
 634       NULL
 635    },
 636
 637    {
 638       MESA_FORMAT_ALPHA_INT32,
 639       NULL,
 640       NULL,
 641       NULL
 642    },
 643
 644
 645    {
 646       MESA_FORMAT_INTENSITY_UINT8,
 647       NULL,
 648       NULL,
 649       NULL
 650    },
 651
 652    {
 653       MESA_FORMAT_INTENSITY_UINT16,
 654       NULL,
 655       NULL,
 656       NULL
 657    },
 658
 659    {
 660       MESA_FORMAT_INTENSITY_UINT32,
 661       NULL,
 662       NULL,
 663       NULL
 664    },
 665
 666    {
 667       MESA_FORMAT_INTENSITY_INT8,
 668       NULL,
 669       NULL,
 670       NULL
 671    },
 672
 673    {
 674       MESA_FORMAT_INTENSITY_INT16,
 675       NULL,
 676       NULL,
 677       NULL
 678    },
 679
 680    {
 681       MESA_FORMAT_INTENSITY_INT32,
 682       NULL,
 683       NULL,
 684       NULL
 685    },
 686
 687
 688    {
 689       MESA_FORMAT_LUMINANCE_UINT8,
 690       NULL,
 691       NULL,
 692       NULL
 693    },
 694
 695    {
 696       MESA_FORMAT_LUMINANCE_UINT16,
 697       NULL,
 698       NULL,
 699       NULL
 700    },
 701
 702    {
 703       MESA_FORMAT_LUMINANCE_UINT32,
 704       NULL,
 705       NULL,
 706       NULL
 707    },
 708
 709    {
 710       MESA_FORMAT_LUMINANCE_INT8,
 711       NULL,
 712       NULL,
 713       NULL
 714    },
 715
 716    {
 717       MESA_FORMAT_LUMINANCE_INT16,
 718       NULL,
 719       NULL,
 720       NULL
 721    },
 722
 723    {
 724       MESA_FORMAT_LUMINANCE_INT32,
 725       NULL,
 726       NULL,
 727       NULL
 728    },
 729
 730
 731    {
 732       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 733       NULL,
 734       NULL,
 735       NULL
 736    },
 737
 738    {
 739       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 740       NULL,
 741       NULL,
 742       NULL
 743    },
 744
 745    {
 746       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 747       NULL,
 748       NULL,
 749       NULL
 750    },
 751
 752    {
 753       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 754       NULL,
 755       NULL,
 756       NULL
 757    },
 758
 759    {
 760       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 761       NULL,
 762       NULL,
 763       NULL
 764    },
 765
 766    {
 767       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 768       NULL,
 769       NULL,
 770       NULL
 771    },
 772
 773
 774    {
 775       MESA_FORMAT_R_INT8,
 776       NULL,
 777       NULL,
 778       NULL
 779    },
 780
 781    {
 782       MESA_FORMAT_RG_INT8,
 783       NULL,
 784       NULL,
 785       NULL
 786    },
 787
 788    {
 789       MESA_FORMAT_RGB_INT8,
 790       NULL,
 791       NULL,
 792       NULL
 793    },
 794
 795    /* non-normalized, signed int */
 796    {
 797       MESA_FORMAT_RGBA_INT8,
 798       fetch_texel_1d_rgba_int8,
 799       fetch_texel_2d_rgba_int8,
 800       fetch_texel_3d_rgba_int8
 801    },
 802    {
 803       MESA_FORMAT_R_INT16,
 804       NULL,
 805       NULL,
 806       NULL
 807    },
 808    {
 809       MESA_FORMAT_RG_INT16,
 810       NULL,
 811       NULL,
 812       NULL
 813    },
 814    {
 815       MESA_FORMAT_RGB_INT16,
 816       NULL,
 817       NULL,
 818       NULL
 819    },
 820    {
 821       MESA_FORMAT_RGBA_INT16,
 822       fetch_texel_1d_rgba_int16,
 823       fetch_texel_2d_rgba_int16,
 824       fetch_texel_3d_rgba_int16
 825    },
 826    {
 827       MESA_FORMAT_R_INT32,
 828       NULL,
 829       NULL,
 830       NULL
 831    },
 832    {
 833       MESA_FORMAT_RG_INT32,
 834       NULL,
 835       NULL,
 836       NULL
 837    },
 838    {
 839       MESA_FORMAT_RGB_INT32,
 840       NULL,
 841       NULL,
 842       NULL
 843    },
 844    {
 845       MESA_FORMAT_RGBA_INT32,
 846       fetch_texel_1d_rgba_int32,
 847       fetch_texel_2d_rgba_int32,
 848       fetch_texel_3d_rgba_int32
 849    },
 850
 851    /* non-normalized, unsigned int */
 852    {
 853       MESA_FORMAT_R_UINT8,
 854       NULL,
 855       NULL,
 856       NULL
 857    },
 858    {
 859       MESA_FORMAT_RG_UINT8,
 860       NULL,
 861       NULL,
 862       NULL
 863    },
 864    {
 865       MESA_FORMAT_RGB_UINT8,
 866       NULL,
 867       NULL,
 868       NULL
 869    },
 870    {
 871       MESA_FORMAT_RGBA_UINT8,
 872       fetch_texel_1d_rgba_uint8,
 873       fetch_texel_2d_rgba_uint8,
 874       fetch_texel_3d_rgba_uint8
 875    },
 876    {
 877       MESA_FORMAT_R_UINT16,
 878       NULL,
 879       NULL,
 880       NULL
 881    },
 882    {
 883       MESA_FORMAT_RG_UINT16,
 884       NULL,
 885       NULL,
 886       NULL
 887    },
 888    {
 889       MESA_FORMAT_RGB_UINT16,
 890       NULL,
 891       NULL,
 892       NULL
 893    },
 894    {
 895       MESA_FORMAT_RGBA_UINT16,
 896       fetch_texel_1d_rgba_uint16,
 897       fetch_texel_2d_rgba_uint16,
 898       fetch_texel_3d_rgba_uint16
 899    },
 900    {
 901       MESA_FORMAT_R_UINT32,
 902       NULL,
 903       NULL,
 904       NULL
 905    },
 906    {
 907       MESA_FORMAT_RG_UINT32,
 908       NULL,
 909       NULL,
 910       NULL
 911    },
 912    {
 913       MESA_FORMAT_RGB_UINT32,
 914       NULL,
 915       NULL,
 916       NULL
 917    },
 918    {
 919       MESA_FORMAT_RGBA_UINT32,
 920       fetch_texel_1d_rgba_uint32,
 921       fetch_texel_2d_rgba_uint32,
 922       fetch_texel_3d_rgba_uint32
 923    },
 924
 925    /* dudv */
 926    {
 927       MESA_FORMAT_DUDV8,
 928       fetch_texel_1d_dudv8,
 929       fetch_texel_2d_dudv8,
 930       fetch_texel_3d_dudv8
 931    },
 932
 933    /* signed, normalized */
 934    {
 935       MESA_FORMAT_SIGNED_R8,
 936       fetch_texel_1d_signed_r8,
 937       fetch_texel_2d_signed_r8,
 938       fetch_texel_3d_signed_r8
 939    },
 940    {
 941       MESA_FORMAT_SIGNED_RG88_REV,
 942       fetch_texel_1d_signed_rg88_rev,
 943       fetch_texel_2d_signed_rg88_rev,
 944       fetch_texel_3d_signed_rg88_rev
 945    },
 946    {
 947       MESA_FORMAT_SIGNED_RGBX8888,
 948       fetch_texel_1d_signed_rgbx8888,
 949       fetch_texel_2d_signed_rgbx8888,
 950       fetch_texel_3d_signed_rgbx8888
 951    },
 952    {
 953       MESA_FORMAT_SIGNED_RGBA8888,
 954       fetch_texel_1d_signed_rgba8888,
 955       fetch_texel_2d_signed_rgba8888,
 956       fetch_texel_3d_signed_rgba8888
 957    },
 958    {
 959       MESA_FORMAT_SIGNED_RGBA8888_REV,
 960       fetch_texel_1d_signed_rgba8888_rev,
 961       fetch_texel_2d_signed_rgba8888_rev,
 962       fetch_texel_3d_signed_rgba8888_rev
 963    },
 964    {
 965       MESA_FORMAT_SIGNED_R16,
 966       fetch_texel_1d_signed_r16,
 967       fetch_texel_2d_signed_r16,
 968       fetch_texel_3d_signed_r16
 969    },
 970    {
 971       MESA_FORMAT_SIGNED_GR1616,
 972       fetch_texel_1d_signed_rg1616,
 973       fetch_texel_2d_signed_rg1616,
 974       fetch_texel_3d_signed_rg1616
 975    },
 976    {
 977       MESA_FORMAT_SIGNED_RGB_16,
 978       fetch_texel_1d_signed_rgb_16,
 979       fetch_texel_2d_signed_rgb_16,
 980       fetch_texel_3d_signed_rgb_16
 981    },
 982    {
 983       MESA_FORMAT_SIGNED_RGBA_16,
 984       fetch_texel_1d_signed_rgba_16,
 985       fetch_texel_2d_signed_rgba_16,
 986       fetch_texel_3d_signed_rgba_16
 987    },
 988    {
 989       MESA_FORMAT_RGBA_16,
 990       fetch_texel_1d_rgba_16,
 991       fetch_texel_2d_rgba_16,
 992       fetch_texel_3d_rgba_16
 993    },
 994    {
 995       MESA_FORMAT_RED_RGTC1,
 996       fetch_compressed,
 997       fetch_compressed,
 998       fetch_compressed
 999    },
1000    {
1001       MESA_FORMAT_SIGNED_RED_RGTC1,
1002       fetch_compressed,
1003       fetch_compressed,
1004       fetch_compressed
1005    },
1006    {
1007       MESA_FORMAT_RG_RGTC2,
1008       fetch_compressed,
1009       fetch_compressed,
1010       fetch_compressed
1011    },
1012    {
1013       MESA_FORMAT_SIGNED_RG_RGTC2,
1014       fetch_compressed,
1015       fetch_compressed,
1016       fetch_compressed
1017    },
1018    {
1019       MESA_FORMAT_L_LATC1,
1020       fetch_compressed,
1021       fetch_compressed,
1022       fetch_compressed
1023    },
1024    {
1025       MESA_FORMAT_SIGNED_L_LATC1,
1026       fetch_compressed,
1027       fetch_compressed,
1028       fetch_compressed
1029    },
1030    {
1031       MESA_FORMAT_LA_LATC2,
1032       fetch_compressed,
1033       fetch_compressed,
1034       fetch_compressed
1035    },
1036    {
1037       MESA_FORMAT_SIGNED_LA_LATC2,
1038       fetch_compressed,
1039       fetch_compressed,
1040       fetch_compressed
1041    },
1042    {
1043       MESA_FORMAT_ETC1_RGB8,
1044       fetch_compressed,
1045       fetch_compressed,
1046       fetch_compressed
1047    },
1048    {
1049       MESA_FORMAT_ETC2_RGB8,
1050       fetch_compressed,
1051       fetch_compressed,
1052       fetch_compressed
1053    },
1054    {
1055       MESA_FORMAT_ETC2_SRGB8,
1056       fetch_compressed,
1057       fetch_compressed,
1058       fetch_compressed
1059    },
1060    {
1061       MESA_FORMAT_ETC2_RGBA8_EAC,
1062       fetch_compressed,
1063       fetch_compressed,
1064       fetch_compressed
1065    },
1066    {
1067       MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC,
1068       fetch_compressed,
1069       fetch_compressed,
1070       fetch_compressed
1071    },
1072    {
1073       MESA_FORMAT_ETC2_R11_EAC,
1074       fetch_compressed,
1075       fetch_compressed,
1076       fetch_compressed
1077    },
1078    {
1079       MESA_FORMAT_ETC2_RG11_EAC,
1080       fetch_compressed,
1081       fetch_compressed,
1082       fetch_compressed
1083    },
1084    {
1085       MESA_FORMAT_ETC2_SIGNED_R11_EAC,
1086       fetch_compressed,
1087       fetch_compressed,
1088       fetch_compressed
1089    },
1090    {
1091       MESA_FORMAT_ETC2_SIGNED_RG11_EAC,
1092       fetch_compressed,
1093       fetch_compressed,
1094       fetch_compressed
1095    },
1096    {
1097       MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
1098       fetch_compressed,
1099       fetch_compressed,
1100       fetch_compressed
1101    },
1102    {
1103       MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1,
1104       fetch_compressed,
1105       fetch_compressed,
1106       fetch_compressed
1107    },
1108    {
1109       MESA_FORMAT_SIGNED_A8,
1110       fetch_texel_1d_signed_a8,
1111       fetch_texel_2d_signed_a8,
1112       fetch_texel_3d_signed_a8
1113    },
1114    {
1115       MESA_FORMAT_SIGNED_L8,
1116       fetch_texel_1d_signed_l8,
1117       fetch_texel_2d_signed_l8,
1118       fetch_texel_3d_signed_l8
1119    },
1120    {
1121       MESA_FORMAT_SIGNED_AL88,
1122       fetch_texel_1d_signed_al88,
1123       fetch_texel_2d_signed_al88,
1124       fetch_texel_3d_signed_al88
1125    },
1126    {
1127       MESA_FORMAT_SIGNED_I8,
1128       fetch_texel_1d_signed_i8,
1129       fetch_texel_2d_signed_i8,
1130       fetch_texel_3d_signed_i8
1131    },
1132    {
1133       MESA_FORMAT_SIGNED_A16,
1134       fetch_texel_1d_signed_a16,
1135       fetch_texel_2d_signed_a16,
1136       fetch_texel_3d_signed_a16
1137    },
1138    {
1139       MESA_FORMAT_SIGNED_L16,
1140       fetch_texel_1d_signed_l16,
1141       fetch_texel_2d_signed_l16,
1142       fetch_texel_3d_signed_l16
1143    },
1144    {
1145       MESA_FORMAT_SIGNED_AL1616,
1146       fetch_texel_1d_signed_al1616,
1147       fetch_texel_2d_signed_al1616,
1148       fetch_texel_3d_signed_al1616
1149    },
1150    {
1151       MESA_FORMAT_SIGNED_I16,
1152       fetch_texel_1d_signed_i16,
1153       fetch_texel_2d_signed_i16,
1154       fetch_texel_3d_signed_i16
1155    },
1156    {
1157       MESA_FORMAT_RGB9_E5_FLOAT,
1158       fetch_texel_1d_rgb9_e5,
1159       fetch_texel_2d_rgb9_e5,
1160       fetch_texel_3d_rgb9_e5
1161    },
1162    {
1163       MESA_FORMAT_R11_G11_B10_FLOAT,
1164       fetch_texel_1d_r11_g11_b10f,
1165       fetch_texel_2d_r11_g11_b10f,
1166       fetch_texel_3d_r11_g11_b10f
1167    },
1168    {
1169       MESA_FORMAT_Z32_FLOAT,
1170       fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
1171       fetch_texel_2d_f_r_f32,
1172       fetch_texel_3d_f_r_f32
1173    },
1174    {
1175       MESA_FORMAT_Z32_FLOAT_X24S8,
1176       fetch_texel_1d_z32f_x24s8,
1177       fetch_texel_2d_z32f_x24s8,
1178       fetch_texel_3d_z32f_x24s8
1179    },
1180    {
1181       MESA_FORMAT_ARGB2101010_UINT,
1182       NULL,
1183       NULL,
1184       NULL
1185    },
1186    {
1187       MESA_FORMAT_ABGR2101010_UINT,
1188       NULL,
1189       NULL,
1190       NULL
1191    },
1192    {
1193       MESA_FORMAT_XRGB4444_UNORM,
1194       NULL,
1195       NULL,
1196       NULL
1197    },
1198    {
1199       MESA_FORMAT_XRGB1555_UNORM,
1200       NULL,
1201       NULL,
1202       NULL
1203    },
1204    {
1205       MESA_FORMAT_XBGR8888_SNORM,
1206       NULL,
1207       NULL,
1208       NULL
1209    },
1210    {
1211       MESA_FORMAT_XBGR8888_SRGB,
1212       NULL,
1213       NULL,
1214       NULL
1215    },
1216    {
1217       MESA_FORMAT_XBGR8888_UINT,
1218       NULL,
1219       NULL,
1220       NULL
1221    },
1222    {
1223       MESA_FORMAT_XBGR8888_SINT,
1224       NULL,
1225       NULL,
1226       NULL
1227    },
1228    {
1229       MESA_FORMAT_XRGB2101010_UNORM,
1230       NULL,
1231       NULL,
1232       NULL
1233    },
1234    {
1235       MESA_FORMAT_XBGR16161616_UNORM,
1236       NULL,
1237       NULL,
1238       NULL
1239    },
1240    {
1241       MESA_FORMAT_XBGR16161616_SNORM,
1242       NULL,
1243       NULL,
1244       NULL
1245    },
1246    {
1247       MESA_FORMAT_XBGR16161616_FLOAT,
1248       NULL,
1249       NULL,
1250       NULL
1251    },
1252    {
1253       MESA_FORMAT_XBGR16161616_UINT,
1254       NULL,
1255       NULL,
1256       NULL
1257    },
1258    {
1259       MESA_FORMAT_XBGR16161616_SINT,
1260       NULL,
1261       NULL,
1262       NULL
1263    },
1264    {
1265       MESA_FORMAT_XBGR32323232_FLOAT,
1266       NULL,
1267       NULL,
1268       NULL
1269    },
1270    {
1271       MESA_FORMAT_XBGR32323232_UINT,
1272       NULL,
1273       NULL,
1274       NULL
1275    },
1276    {
1277       MESA_FORMAT_XBGR32323232_SINT,
1278       NULL,
1279       NULL,
1280       NULL
1281    },
1282 };
1283
1284
1285 /**
1286  * Initialize the texture image's FetchTexel methods.
1287  */
1288 static void
1289 set_fetch_functions(const struct gl_sampler_object *samp,
1290                     struct swrast_texture_image *texImage, GLuint dims)
1291 {
1292    gl_format format = texImage->Base.TexFormat;
1293
1294 #ifdef DEBUG
1295    /* check that the table entries are sorted by format name */
1296    gl_format fmt;
1297    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
1298       assert(texfetch_funcs[fmt].Name == fmt);
1299    }
1300 #endif
1301
1302    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
1303
1304    if (samp->sRGBDecode == GL_SKIP_DECODE_EXT &&
1305        _mesa_get_format_color_encoding(format) == GL_SRGB) {
1306       format = _mesa_get_srgb_format_linear(format);
1307    }
1308
1309    assert(format < MESA_FORMAT_COUNT);
1310
1311    switch (dims) {
1312    case 1:
1313       texImage->FetchTexel = texfetch_funcs[format].Fetch1D;
1314       break;
1315    case 2:
1316       texImage->FetchTexel = texfetch_funcs[format].Fetch2D;
1317       break;
1318    case 3:
1319       texImage->FetchTexel = texfetch_funcs[format].Fetch3D;
1320       break;
1321    default:
1322       assert(!"Bad dims in set_fetch_functions()");
1323    }
1324
1325    texImage->FetchCompressedTexel = _mesa_get_compressed_fetch_func(format);
1326
1327    ASSERT(texImage->FetchTexel);
1328 }
1329
1330 void
1331 _mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit)
1332 {
1333    struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
1334    struct gl_sampler_object *samp;
1335    GLuint face, i;
1336    GLuint dims;
1337
1338    if (!texObj)
1339       return;
1340
1341    samp = _mesa_get_samplerobj(ctx, unit);
1342
1343    dims = _mesa_get_texture_dimensions(texObj->Target);
1344
1345    for (face = 0; face < 6; face++) {
1346       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
1347          if (texObj->Image[face][i]) {
1348             set_fetch_functions(samp,
1349                                 swrast_texture_image(texObj->Image[face][i]),
1350                                 dims);
1351          }
1352       }
1353    }
1354 }