src/mesa/swrast/s_texfetch.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (c) 2009  VMware, Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * 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    /* The FetchCompressedTexel function takes an integer pixel rowstride,
 101     * while the image's rowstride is bytes per row of blocks.
 102     */
 103    GLuint bw, bh;
 104    GLuint texelBytes = _mesa_get_format_bytes(swImage->Base.TexFormat);
 105    _mesa_get_format_block_size(swImage->Base.TexFormat, &bw, &bh);
 106    assert(swImage->RowStride * bw % texelBytes == 0);
 107
 108    swImage->FetchCompressedTexel(swImage->ImageSlices[k],
 109                                  swImage->RowStride * bw / texelBytes,
 110                                  i, j, texel);
 111 }
 112
 113
 114
 115 /**
 116  * Null texel fetch function.
 117  *
 118  * Have to have this so the FetchTexel function pointer is never NULL.
 119  */
 120 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
 121                                GLint i, GLint j, GLint k, GLfloat *texel )
 122 {
 123    (void) texImage; (void) i; (void) j; (void) k;
 124    texel[RCOMP] = 0.0;
 125    texel[GCOMP] = 0.0;
 126    texel[BCOMP] = 0.0;
 127    texel[ACOMP] = 0.0;
 128    _mesa_warning(NULL, "fetch_null_texelf() called!");
 129 }
 130
 131
 132 /**
 133  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 134  * XXX this is somewhat temporary.
 135  */
 136 static struct {
 137    gl_format Name;
 138    FetchTexelFunc Fetch1D;
 139    FetchTexelFunc Fetch2D;
 140    FetchTexelFunc Fetch3D;
 141 }
 142 texfetch_funcs[] =
 143 {
 144    {
 145       MESA_FORMAT_NONE,
 146       fetch_null_texelf,
 147       fetch_null_texelf,
 148       fetch_null_texelf
 149    },
 150
 151    {
 152       MESA_FORMAT_RGBA8888,
 153       fetch_texel_1d_f_rgba8888,
 154       fetch_texel_2d_f_rgba8888,
 155       fetch_texel_3d_f_rgba8888
 156    },
 157    {
 158       MESA_FORMAT_RGBA8888_REV,
 159       fetch_texel_1d_f_rgba8888_rev,
 160       fetch_texel_2d_f_rgba8888_rev,
 161       fetch_texel_3d_f_rgba8888_rev
 162    },
 163    {
 164       MESA_FORMAT_ARGB8888,
 165       fetch_texel_1d_f_argb8888,
 166       fetch_texel_2d_f_argb8888,
 167       fetch_texel_3d_f_argb8888
 168    },
 169    {
 170       MESA_FORMAT_ARGB8888_REV,
 171       fetch_texel_1d_f_argb8888_rev,
 172       fetch_texel_2d_f_argb8888_rev,
 173       fetch_texel_3d_f_argb8888_rev
 174    },
 175    {
 176       MESA_FORMAT_RGBX8888,
 177       fetch_texel_1d_f_rgbx8888,
 178       fetch_texel_2d_f_rgbx8888,
 179       fetch_texel_3d_f_rgbx8888
 180    },
 181    {
 182       MESA_FORMAT_RGBX8888_REV,
 183       fetch_texel_1d_f_rgbx8888_rev,
 184       fetch_texel_2d_f_rgbx8888_rev,
 185       fetch_texel_3d_f_rgbx8888_rev
 186    },
 187    {
 188       MESA_FORMAT_XRGB8888,
 189       fetch_texel_1d_f_xrgb8888,
 190       fetch_texel_2d_f_xrgb8888,
 191       fetch_texel_3d_f_xrgb8888
 192    },
 193    {
 194       MESA_FORMAT_XRGB8888_REV,
 195       fetch_texel_1d_f_xrgb8888_rev,
 196       fetch_texel_2d_f_xrgb8888_rev,
 197       fetch_texel_3d_f_xrgb8888_rev
 198    },
 199    {
 200       MESA_FORMAT_RGB888,
 201       fetch_texel_1d_f_rgb888,
 202       fetch_texel_2d_f_rgb888,
 203       fetch_texel_3d_f_rgb888
 204    },
 205    {
 206       MESA_FORMAT_BGR888,
 207       fetch_texel_1d_f_bgr888,
 208       fetch_texel_2d_f_bgr888,
 209       fetch_texel_3d_f_bgr888
 210    },
 211    {
 212       MESA_FORMAT_RGB565,
 213       fetch_texel_1d_f_rgb565,
 214       fetch_texel_2d_f_rgb565,
 215       fetch_texel_3d_f_rgb565
 216    },
 217    {
 218       MESA_FORMAT_RGB565_REV,
 219       fetch_texel_1d_f_rgb565_rev,
 220       fetch_texel_2d_f_rgb565_rev,
 221       fetch_texel_3d_f_rgb565_rev
 222    },
 223    {
 224       MESA_FORMAT_ARGB4444,
 225       fetch_texel_1d_f_argb4444,
 226       fetch_texel_2d_f_argb4444,
 227       fetch_texel_3d_f_argb4444
 228    },
 229    {
 230       MESA_FORMAT_ARGB4444_REV,
 231       fetch_texel_1d_f_argb4444_rev,
 232       fetch_texel_2d_f_argb4444_rev,
 233       fetch_texel_3d_f_argb4444_rev
 234    },
 235    {
 236       MESA_FORMAT_RGBA5551,
 237       fetch_texel_1d_f_rgba5551,
 238       fetch_texel_2d_f_rgba5551,
 239       fetch_texel_3d_f_rgba5551
 240    },
 241    {
 242       MESA_FORMAT_ARGB1555,
 243       fetch_texel_1d_f_argb1555,
 244       fetch_texel_2d_f_argb1555,
 245       fetch_texel_3d_f_argb1555
 246    },
 247    {
 248       MESA_FORMAT_ARGB1555_REV,
 249       fetch_texel_1d_f_argb1555_rev,
 250       fetch_texel_2d_f_argb1555_rev,
 251       fetch_texel_3d_f_argb1555_rev
 252    },
 253    {
 254       MESA_FORMAT_AL44,
 255       fetch_texel_1d_f_al44,
 256       fetch_texel_2d_f_al44,
 257       fetch_texel_3d_f_al44
 258    },
 259    {
 260       MESA_FORMAT_AL88,
 261       fetch_texel_1d_f_al88,
 262       fetch_texel_2d_f_al88,
 263       fetch_texel_3d_f_al88
 264    },
 265    {
 266       MESA_FORMAT_AL88_REV,
 267       fetch_texel_1d_f_al88_rev,
 268       fetch_texel_2d_f_al88_rev,
 269       fetch_texel_3d_f_al88_rev
 270    },
 271    {
 272       MESA_FORMAT_AL1616,
 273       fetch_texel_1d_f_al1616,
 274       fetch_texel_2d_f_al1616,
 275       fetch_texel_3d_f_al1616
 276    },
 277    {
 278       MESA_FORMAT_AL1616_REV,
 279       fetch_texel_1d_f_al1616_rev,
 280       fetch_texel_2d_f_al1616_rev,
 281       fetch_texel_3d_f_al1616_rev
 282    },
 283    {
 284       MESA_FORMAT_RGB332,
 285       fetch_texel_1d_f_rgb332,
 286       fetch_texel_2d_f_rgb332,
 287       fetch_texel_3d_f_rgb332
 288    },
 289    {
 290       MESA_FORMAT_A8,
 291       fetch_texel_1d_f_a8,
 292       fetch_texel_2d_f_a8,
 293       fetch_texel_3d_f_a8
 294    },
 295    {
 296       MESA_FORMAT_A16,
 297       fetch_texel_1d_f_a16,
 298       fetch_texel_2d_f_a16,
 299       fetch_texel_3d_f_a16
 300    },
 301    {
 302       MESA_FORMAT_L8,
 303       fetch_texel_1d_f_l8,
 304       fetch_texel_2d_f_l8,
 305       fetch_texel_3d_f_l8
 306    },
 307    {
 308       MESA_FORMAT_L16,
 309       fetch_texel_1d_f_l16,
 310       fetch_texel_2d_f_l16,
 311       fetch_texel_3d_f_l16
 312    },
 313    {
 314       MESA_FORMAT_I8,
 315       fetch_texel_1d_f_i8,
 316       fetch_texel_2d_f_i8,
 317       fetch_texel_3d_f_i8
 318    },
 319    {
 320       MESA_FORMAT_I16,
 321       fetch_texel_1d_f_i16,
 322       fetch_texel_2d_f_i16,
 323       fetch_texel_3d_f_i16
 324    },
 325    {
 326       MESA_FORMAT_YCBCR,
 327       fetch_texel_1d_f_ycbcr,
 328       fetch_texel_2d_f_ycbcr,
 329       fetch_texel_3d_f_ycbcr
 330    },
 331    {
 332       MESA_FORMAT_YCBCR_REV,
 333       fetch_texel_1d_f_ycbcr_rev,
 334       fetch_texel_2d_f_ycbcr_rev,
 335       fetch_texel_3d_f_ycbcr_rev
 336    },
 337    {
 338       MESA_FORMAT_R8,
 339       fetch_texel_1d_f_r8,
 340       fetch_texel_2d_f_r8,
 341       fetch_texel_3d_f_r8
 342    },
 343    {
 344       MESA_FORMAT_GR88,
 345       fetch_texel_1d_f_gr88,
 346       fetch_texel_2d_f_gr88,
 347       fetch_texel_3d_f_gr88
 348    },
 349    {
 350       MESA_FORMAT_RG88,
 351       fetch_texel_1d_f_rg88,
 352       fetch_texel_2d_f_rg88,
 353       fetch_texel_3d_f_rg88
 354    },
 355    {
 356       MESA_FORMAT_R16,
 357       fetch_texel_1d_f_r16,
 358       fetch_texel_2d_f_r16,
 359       fetch_texel_3d_f_r16
 360    },
 361    {
 362       MESA_FORMAT_GR1616,
 363       fetch_texel_1d_f_rg1616,
 364       fetch_texel_2d_f_rg1616,
 365       fetch_texel_3d_f_rg1616
 366    },
 367    {
 368       MESA_FORMAT_RG1616,
 369       fetch_texel_1d_f_rg1616_rev,
 370       fetch_texel_2d_f_rg1616_rev,
 371       fetch_texel_3d_f_rg1616_rev
 372    },
 373    {
 374       MESA_FORMAT_ARGB2101010,
 375       fetch_texel_1d_f_argb2101010,
 376       fetch_texel_2d_f_argb2101010,
 377       fetch_texel_3d_f_argb2101010
 378    },
 379    {
 380       MESA_FORMAT_Z24_S8,
 381       fetch_texel_1d_f_z24_s8,
 382       fetch_texel_2d_f_z24_s8,
 383       fetch_texel_3d_f_z24_s8
 384    },
 385    {
 386       MESA_FORMAT_S8_Z24,
 387       fetch_texel_1d_f_s8_z24,
 388       fetch_texel_2d_f_s8_z24,
 389       fetch_texel_3d_f_s8_z24
 390    },
 391    {
 392       MESA_FORMAT_Z16,
 393       fetch_texel_1d_f_z16,
 394       fetch_texel_2d_f_z16,
 395       fetch_texel_3d_f_z16
 396    },
 397    {
 398       MESA_FORMAT_X8_Z24,
 399       fetch_texel_1d_f_s8_z24,
 400       fetch_texel_2d_f_s8_z24,
 401       fetch_texel_3d_f_s8_z24
 402    },
 403    {
 404       MESA_FORMAT_Z24_X8,
 405       fetch_texel_1d_f_z24_s8,
 406       fetch_texel_2d_f_z24_s8,
 407       fetch_texel_3d_f_z24_s8
 408    },
 409    {
 410       MESA_FORMAT_Z32,
 411       fetch_texel_1d_f_z32,
 412       fetch_texel_2d_f_z32,
 413       fetch_texel_3d_f_z32
 414    },
 415    {
 416       MESA_FORMAT_S8,
 417       NULL,
 418       NULL,
 419       NULL
 420    },
 421    {
 422       MESA_FORMAT_SRGB8,
 423       fetch_texel_1d_srgb8,
 424       fetch_texel_2d_srgb8,
 425       fetch_texel_3d_srgb8
 426    },
 427    {
 428       MESA_FORMAT_SRGBA8,
 429       fetch_texel_1d_srgba8,
 430       fetch_texel_2d_srgba8,
 431       fetch_texel_3d_srgba8
 432    },
 433    {
 434       MESA_FORMAT_SARGB8,
 435       fetch_texel_1d_sargb8,
 436       fetch_texel_2d_sargb8,
 437       fetch_texel_3d_sargb8
 438    },
 439    {
 440       MESA_FORMAT_SL8,
 441       fetch_texel_1d_sl8,
 442       fetch_texel_2d_sl8,
 443       fetch_texel_3d_sl8
 444    },
 445    {
 446       MESA_FORMAT_SLA8,
 447       fetch_texel_1d_sla8,
 448       fetch_texel_2d_sla8,
 449       fetch_texel_3d_sla8
 450    },
 451    {
 452       MESA_FORMAT_SRGB_DXT1,
 453       fetch_compressed,
 454       fetch_compressed,
 455       fetch_compressed
 456    },
 457    {
 458       MESA_FORMAT_SRGBA_DXT1,
 459       fetch_compressed,
 460       fetch_compressed,
 461       fetch_compressed
 462    },
 463    {
 464       MESA_FORMAT_SRGBA_DXT3,
 465       fetch_compressed,
 466       fetch_compressed,
 467       fetch_compressed
 468    },
 469    {
 470       MESA_FORMAT_SRGBA_DXT5,
 471       fetch_compressed,
 472       fetch_compressed,
 473       fetch_compressed
 474    },
 475
 476    {
 477       MESA_FORMAT_RGB_FXT1,
 478       fetch_compressed,
 479       fetch_compressed,
 480       fetch_compressed
 481    },
 482    {
 483       MESA_FORMAT_RGBA_FXT1,
 484       fetch_compressed,
 485       fetch_compressed,
 486       fetch_compressed
 487    },
 488    {
 489       MESA_FORMAT_RGB_DXT1,
 490       fetch_compressed,
 491       fetch_compressed,
 492       fetch_compressed
 493    },
 494    {
 495       MESA_FORMAT_RGBA_DXT1,
 496       fetch_compressed,
 497       fetch_compressed,
 498       fetch_compressed
 499    },
 500    {
 501       MESA_FORMAT_RGBA_DXT3,
 502       fetch_compressed,
 503       fetch_compressed,
 504       fetch_compressed
 505    },
 506    {
 507       MESA_FORMAT_RGBA_DXT5,
 508       fetch_compressed,
 509       fetch_compressed,
 510       fetch_compressed
 511    },
 512    {
 513       MESA_FORMAT_RGBA_FLOAT32,
 514       fetch_texel_1d_f_rgba_f32,
 515       fetch_texel_2d_f_rgba_f32,
 516       fetch_texel_3d_f_rgba_f32
 517    },
 518    {
 519       MESA_FORMAT_RGBA_FLOAT16,
 520       fetch_texel_1d_f_rgba_f16,
 521       fetch_texel_2d_f_rgba_f16,
 522       fetch_texel_3d_f_rgba_f16
 523    },
 524    {
 525       MESA_FORMAT_RGB_FLOAT32,
 526       fetch_texel_1d_f_rgb_f32,
 527       fetch_texel_2d_f_rgb_f32,
 528       fetch_texel_3d_f_rgb_f32
 529    },
 530    {
 531       MESA_FORMAT_RGB_FLOAT16,
 532       fetch_texel_1d_f_rgb_f16,
 533       fetch_texel_2d_f_rgb_f16,
 534       fetch_texel_3d_f_rgb_f16
 535    },
 536    {
 537       MESA_FORMAT_ALPHA_FLOAT32,
 538       fetch_texel_1d_f_alpha_f32,
 539       fetch_texel_2d_f_alpha_f32,
 540       fetch_texel_3d_f_alpha_f32
 541    },
 542    {
 543       MESA_FORMAT_ALPHA_FLOAT16,
 544       fetch_texel_1d_f_alpha_f16,
 545       fetch_texel_2d_f_alpha_f16,
 546       fetch_texel_3d_f_alpha_f16
 547    },
 548    {
 549       MESA_FORMAT_LUMINANCE_FLOAT32,
 550       fetch_texel_1d_f_luminance_f32,
 551       fetch_texel_2d_f_luminance_f32,
 552       fetch_texel_3d_f_luminance_f32
 553    },
 554    {
 555       MESA_FORMAT_LUMINANCE_FLOAT16,
 556       fetch_texel_1d_f_luminance_f16,
 557       fetch_texel_2d_f_luminance_f16,
 558       fetch_texel_3d_f_luminance_f16
 559    },
 560    {
 561       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 562       fetch_texel_1d_f_luminance_alpha_f32,
 563       fetch_texel_2d_f_luminance_alpha_f32,
 564       fetch_texel_3d_f_luminance_alpha_f32
 565    },
 566    {
 567       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 568       fetch_texel_1d_f_luminance_alpha_f16,
 569       fetch_texel_2d_f_luminance_alpha_f16,
 570       fetch_texel_3d_f_luminance_alpha_f16
 571    },
 572    {
 573       MESA_FORMAT_INTENSITY_FLOAT32,
 574       fetch_texel_1d_f_intensity_f32,
 575       fetch_texel_2d_f_intensity_f32,
 576       fetch_texel_3d_f_intensity_f32
 577    },
 578    {
 579       MESA_FORMAT_INTENSITY_FLOAT16,
 580       fetch_texel_1d_f_intensity_f16,
 581       fetch_texel_2d_f_intensity_f16,
 582       fetch_texel_3d_f_intensity_f16
 583    },
 584    {
 585       MESA_FORMAT_R_FLOAT32,
 586       fetch_texel_1d_f_r_f32,
 587       fetch_texel_2d_f_r_f32,
 588       fetch_texel_3d_f_r_f32
 589    },
 590    {
 591       MESA_FORMAT_R_FLOAT16,
 592       fetch_texel_1d_f_r_f16,
 593       fetch_texel_2d_f_r_f16,
 594       fetch_texel_3d_f_r_f16
 595    },
 596    {
 597       MESA_FORMAT_RG_FLOAT32,
 598       fetch_texel_1d_f_rg_f32,
 599       fetch_texel_2d_f_rg_f32,
 600       fetch_texel_3d_f_rg_f32
 601    },
 602    {
 603       MESA_FORMAT_RG_FLOAT16,
 604       fetch_texel_1d_f_rg_f16,
 605       fetch_texel_2d_f_rg_f16,
 606       fetch_texel_3d_f_rg_f16
 607    },
 608
 609    {
 610       MESA_FORMAT_ALPHA_UINT8,
 611       NULL,
 612       NULL,
 613       NULL
 614    },
 615
 616    {
 617       MESA_FORMAT_ALPHA_UINT16,
 618       NULL,
 619       NULL,
 620       NULL
 621    },
 622
 623    {
 624       MESA_FORMAT_ALPHA_UINT32,
 625       NULL,
 626       NULL,
 627       NULL
 628    },
 629
 630    {
 631       MESA_FORMAT_ALPHA_INT8,
 632       NULL,
 633       NULL,
 634       NULL
 635    },
 636
 637    {
 638       MESA_FORMAT_ALPHA_INT16,
 639       NULL,
 640       NULL,
 641       NULL
 642    },
 643
 644    {
 645       MESA_FORMAT_ALPHA_INT32,
 646       NULL,
 647       NULL,
 648       NULL
 649    },
 650
 651
 652    {
 653       MESA_FORMAT_INTENSITY_UINT8,
 654       NULL,
 655       NULL,
 656       NULL
 657    },
 658
 659    {
 660       MESA_FORMAT_INTENSITY_UINT16,
 661       NULL,
 662       NULL,
 663       NULL
 664    },
 665
 666    {
 667       MESA_FORMAT_INTENSITY_UINT32,
 668       NULL,
 669       NULL,
 670       NULL
 671    },
 672
 673    {
 674       MESA_FORMAT_INTENSITY_INT8,
 675       NULL,
 676       NULL,
 677       NULL
 678    },
 679
 680    {
 681       MESA_FORMAT_INTENSITY_INT16,
 682       NULL,
 683       NULL,
 684       NULL
 685    },
 686
 687    {
 688       MESA_FORMAT_INTENSITY_INT32,
 689       NULL,
 690       NULL,
 691       NULL
 692    },
 693
 694
 695    {
 696       MESA_FORMAT_LUMINANCE_UINT8,
 697       NULL,
 698       NULL,
 699       NULL
 700    },
 701
 702    {
 703       MESA_FORMAT_LUMINANCE_UINT16,
 704       NULL,
 705       NULL,
 706       NULL
 707    },
 708
 709    {
 710       MESA_FORMAT_LUMINANCE_UINT32,
 711       NULL,
 712       NULL,
 713       NULL
 714    },
 715
 716    {
 717       MESA_FORMAT_LUMINANCE_INT8,
 718       NULL,
 719       NULL,
 720       NULL
 721    },
 722
 723    {
 724       MESA_FORMAT_LUMINANCE_INT16,
 725       NULL,
 726       NULL,
 727       NULL
 728    },
 729
 730    {
 731       MESA_FORMAT_LUMINANCE_INT32,
 732       NULL,
 733       NULL,
 734       NULL
 735    },
 736
 737
 738    {
 739       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 740       NULL,
 741       NULL,
 742       NULL
 743    },
 744
 745    {
 746       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 747       NULL,
 748       NULL,
 749       NULL
 750    },
 751
 752    {
 753       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 754       NULL,
 755       NULL,
 756       NULL
 757    },
 758
 759    {
 760       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 761       NULL,
 762       NULL,
 763       NULL
 764    },
 765
 766    {
 767       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 768       NULL,
 769       NULL,
 770       NULL
 771    },
 772
 773    {
 774       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 775       NULL,
 776       NULL,
 777       NULL
 778    },
 779
 780
 781    {
 782       MESA_FORMAT_R_INT8,
 783       NULL,
 784       NULL,
 785       NULL
 786    },
 787
 788    {
 789       MESA_FORMAT_RG_INT8,
 790       NULL,
 791       NULL,
 792       NULL
 793    },
 794
 795    {
 796       MESA_FORMAT_RGB_INT8,
 797       NULL,
 798       NULL,
 799       NULL
 800    },
 801
 802    /* non-normalized, signed int */
 803    {
 804       MESA_FORMAT_RGBA_INT8,
 805       fetch_texel_1d_rgba_int8,
 806       fetch_texel_2d_rgba_int8,
 807       fetch_texel_3d_rgba_int8
 808    },
 809    {
 810       MESA_FORMAT_R_INT16,
 811       NULL,
 812       NULL,
 813       NULL
 814    },
 815    {
 816       MESA_FORMAT_RG_INT16,
 817       NULL,
 818       NULL,
 819       NULL
 820    },
 821    {
 822       MESA_FORMAT_RGB_INT16,
 823       NULL,
 824       NULL,
 825       NULL
 826    },
 827    {
 828       MESA_FORMAT_RGBA_INT16,
 829       fetch_texel_1d_rgba_int16,
 830       fetch_texel_2d_rgba_int16,
 831       fetch_texel_3d_rgba_int16
 832    },
 833    {
 834       MESA_FORMAT_R_INT32,
 835       NULL,
 836       NULL,
 837       NULL
 838    },
 839    {
 840       MESA_FORMAT_RG_INT32,
 841       NULL,
 842       NULL,
 843       NULL
 844    },
 845    {
 846       MESA_FORMAT_RGB_INT32,
 847       NULL,
 848       NULL,
 849       NULL
 850    },
 851    {
 852       MESA_FORMAT_RGBA_INT32,
 853       fetch_texel_1d_rgba_int32,
 854       fetch_texel_2d_rgba_int32,
 855       fetch_texel_3d_rgba_int32
 856    },
 857
 858    /* non-normalized, unsigned int */
 859    {
 860       MESA_FORMAT_R_UINT8,
 861       NULL,
 862       NULL,
 863       NULL
 864    },
 865    {
 866       MESA_FORMAT_RG_UINT8,
 867       NULL,
 868       NULL,
 869       NULL
 870    },
 871    {
 872       MESA_FORMAT_RGB_UINT8,
 873       NULL,
 874       NULL,
 875       NULL
 876    },
 877    {
 878       MESA_FORMAT_RGBA_UINT8,
 879       fetch_texel_1d_rgba_uint8,
 880       fetch_texel_2d_rgba_uint8,
 881       fetch_texel_3d_rgba_uint8
 882    },
 883    {
 884       MESA_FORMAT_R_UINT16,
 885       NULL,
 886       NULL,
 887       NULL
 888    },
 889    {
 890       MESA_FORMAT_RG_UINT16,
 891       NULL,
 892       NULL,
 893       NULL
 894    },
 895    {
 896       MESA_FORMAT_RGB_UINT16,
 897       NULL,
 898       NULL,
 899       NULL
 900    },
 901    {
 902       MESA_FORMAT_RGBA_UINT16,
 903       fetch_texel_1d_rgba_uint16,
 904       fetch_texel_2d_rgba_uint16,
 905       fetch_texel_3d_rgba_uint16
 906    },
 907    {
 908       MESA_FORMAT_R_UINT32,
 909       NULL,
 910       NULL,
 911       NULL
 912    },
 913    {
 914       MESA_FORMAT_RG_UINT32,
 915       NULL,
 916       NULL,
 917       NULL
 918    },
 919    {
 920       MESA_FORMAT_RGB_UINT32,
 921       NULL,
 922       NULL,
 923       NULL
 924    },
 925    {
 926       MESA_FORMAT_RGBA_UINT32,
 927       fetch_texel_1d_rgba_uint32,
 928       fetch_texel_2d_rgba_uint32,
 929       fetch_texel_3d_rgba_uint32
 930    },
 931
 932    /* dudv */
 933    {
 934       MESA_FORMAT_DUDV8,
 935       fetch_texel_1d_dudv8,
 936       fetch_texel_2d_dudv8,
 937       fetch_texel_3d_dudv8
 938    },
 939
 940    /* signed, normalized */
 941    {
 942       MESA_FORMAT_SIGNED_R8,
 943       fetch_texel_1d_signed_r8,
 944       fetch_texel_2d_signed_r8,
 945       fetch_texel_3d_signed_r8
 946    },
 947    {
 948       MESA_FORMAT_SIGNED_RG88_REV,
 949       fetch_texel_1d_signed_rg88_rev,
 950       fetch_texel_2d_signed_rg88_rev,
 951       fetch_texel_3d_signed_rg88_rev
 952    },
 953    {
 954       MESA_FORMAT_SIGNED_RGBX8888,
 955       fetch_texel_1d_signed_rgbx8888,
 956       fetch_texel_2d_signed_rgbx8888,
 957       fetch_texel_3d_signed_rgbx8888
 958    },
 959    {
 960       MESA_FORMAT_SIGNED_RGBA8888,
 961       fetch_texel_1d_signed_rgba8888,
 962       fetch_texel_2d_signed_rgba8888,
 963       fetch_texel_3d_signed_rgba8888
 964    },
 965    {
 966       MESA_FORMAT_SIGNED_RGBA8888_REV,
 967       fetch_texel_1d_signed_rgba8888_rev,
 968       fetch_texel_2d_signed_rgba8888_rev,
 969       fetch_texel_3d_signed_rgba8888_rev
 970    },
 971    {
 972       MESA_FORMAT_SIGNED_R16,
 973       fetch_texel_1d_signed_r16,
 974       fetch_texel_2d_signed_r16,
 975       fetch_texel_3d_signed_r16
 976    },
 977    {
 978       MESA_FORMAT_SIGNED_GR1616,
 979       fetch_texel_1d_signed_rg1616,
 980       fetch_texel_2d_signed_rg1616,
 981       fetch_texel_3d_signed_rg1616
 982    },
 983    {
 984       MESA_FORMAT_SIGNED_RGB_16,
 985       fetch_texel_1d_signed_rgb_16,
 986       fetch_texel_2d_signed_rgb_16,
 987       fetch_texel_3d_signed_rgb_16
 988    },
 989    {
 990       MESA_FORMAT_SIGNED_RGBA_16,
 991       fetch_texel_1d_signed_rgba_16,
 992       fetch_texel_2d_signed_rgba_16,
 993       fetch_texel_3d_signed_rgba_16
 994    },
 995    {
 996       MESA_FORMAT_RGBA_16,
 997       fetch_texel_1d_rgba_16,
 998       fetch_texel_2d_rgba_16,
 999       fetch_texel_3d_rgba_16
1000    },
1001    {
1002       MESA_FORMAT_RED_RGTC1,
1003       fetch_compressed,
1004       fetch_compressed,
1005       fetch_compressed
1006    },
1007    {
1008       MESA_FORMAT_SIGNED_RED_RGTC1,
1009       fetch_compressed,
1010       fetch_compressed,
1011       fetch_compressed
1012    },
1013    {
1014       MESA_FORMAT_RG_RGTC2,
1015       fetch_compressed,
1016       fetch_compressed,
1017       fetch_compressed
1018    },
1019    {
1020       MESA_FORMAT_SIGNED_RG_RGTC2,
1021       fetch_compressed,
1022       fetch_compressed,
1023       fetch_compressed
1024    },
1025    {
1026       MESA_FORMAT_L_LATC1,
1027       fetch_compressed,
1028       fetch_compressed,
1029       fetch_compressed
1030    },
1031    {
1032       MESA_FORMAT_SIGNED_L_LATC1,
1033       fetch_compressed,
1034       fetch_compressed,
1035       fetch_compressed
1036    },
1037    {
1038       MESA_FORMAT_LA_LATC2,
1039       fetch_compressed,
1040       fetch_compressed,
1041       fetch_compressed
1042    },
1043    {
1044       MESA_FORMAT_SIGNED_LA_LATC2,
1045       fetch_compressed,
1046       fetch_compressed,
1047       fetch_compressed
1048    },
1049    {
1050       MESA_FORMAT_ETC1_RGB8,
1051       fetch_compressed,
1052       fetch_compressed,
1053       fetch_compressed
1054    },
1055    {
1056       MESA_FORMAT_ETC2_RGB8,
1057       fetch_compressed,
1058       fetch_compressed,
1059       fetch_compressed
1060    },
1061    {
1062       MESA_FORMAT_ETC2_SRGB8,
1063       fetch_compressed,
1064       fetch_compressed,
1065       fetch_compressed
1066    },
1067    {
1068       MESA_FORMAT_ETC2_RGBA8_EAC,
1069       fetch_compressed,
1070       fetch_compressed,
1071       fetch_compressed
1072    },
1073    {
1074       MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC,
1075       fetch_compressed,
1076       fetch_compressed,
1077       fetch_compressed
1078    },
1079    {
1080       MESA_FORMAT_ETC2_R11_EAC,
1081       fetch_compressed,
1082       fetch_compressed,
1083       fetch_compressed
1084    },
1085    {
1086       MESA_FORMAT_ETC2_RG11_EAC,
1087       fetch_compressed,
1088       fetch_compressed,
1089       fetch_compressed
1090    },
1091    {
1092       MESA_FORMAT_ETC2_SIGNED_R11_EAC,
1093       fetch_compressed,
1094       fetch_compressed,
1095       fetch_compressed
1096    },
1097    {
1098       MESA_FORMAT_ETC2_SIGNED_RG11_EAC,
1099       fetch_compressed,
1100       fetch_compressed,
1101       fetch_compressed
1102    },
1103    {
1104       MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
1105       fetch_compressed,
1106       fetch_compressed,
1107       fetch_compressed
1108    },
1109    {
1110       MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1,
1111       fetch_compressed,
1112       fetch_compressed,
1113       fetch_compressed
1114    },
1115    {
1116       MESA_FORMAT_SIGNED_A8,
1117       fetch_texel_1d_signed_a8,
1118       fetch_texel_2d_signed_a8,
1119       fetch_texel_3d_signed_a8
1120    },
1121    {
1122       MESA_FORMAT_SIGNED_L8,
1123       fetch_texel_1d_signed_l8,
1124       fetch_texel_2d_signed_l8,
1125       fetch_texel_3d_signed_l8
1126    },
1127    {
1128       MESA_FORMAT_SIGNED_AL88,
1129       fetch_texel_1d_signed_al88,
1130       fetch_texel_2d_signed_al88,
1131       fetch_texel_3d_signed_al88
1132    },
1133    {
1134       MESA_FORMAT_SIGNED_I8,
1135       fetch_texel_1d_signed_i8,
1136       fetch_texel_2d_signed_i8,
1137       fetch_texel_3d_signed_i8
1138    },
1139    {
1140       MESA_FORMAT_SIGNED_A16,
1141       fetch_texel_1d_signed_a16,
1142       fetch_texel_2d_signed_a16,
1143       fetch_texel_3d_signed_a16
1144    },
1145    {
1146       MESA_FORMAT_SIGNED_L16,
1147       fetch_texel_1d_signed_l16,
1148       fetch_texel_2d_signed_l16,
1149       fetch_texel_3d_signed_l16
1150    },
1151    {
1152       MESA_FORMAT_SIGNED_AL1616,
1153       fetch_texel_1d_signed_al1616,
1154       fetch_texel_2d_signed_al1616,
1155       fetch_texel_3d_signed_al1616
1156    },
1157    {
1158       MESA_FORMAT_SIGNED_I16,
1159       fetch_texel_1d_signed_i16,
1160       fetch_texel_2d_signed_i16,
1161       fetch_texel_3d_signed_i16
1162    },
1163    {
1164       MESA_FORMAT_RGB9_E5_FLOAT,
1165       fetch_texel_1d_rgb9_e5,
1166       fetch_texel_2d_rgb9_e5,
1167       fetch_texel_3d_rgb9_e5
1168    },
1169    {
1170       MESA_FORMAT_R11_G11_B10_FLOAT,
1171       fetch_texel_1d_r11_g11_b10f,
1172       fetch_texel_2d_r11_g11_b10f,
1173       fetch_texel_3d_r11_g11_b10f
1174    },
1175    {
1176       MESA_FORMAT_Z32_FLOAT,
1177       fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
1178       fetch_texel_2d_f_r_f32,
1179       fetch_texel_3d_f_r_f32
1180    },
1181    {
1182       MESA_FORMAT_Z32_FLOAT_X24S8,
1183       fetch_texel_1d_z32f_x24s8,
1184       fetch_texel_2d_z32f_x24s8,
1185       fetch_texel_3d_z32f_x24s8
1186    },
1187    {
1188       MESA_FORMAT_ARGB2101010_UINT,
1189       NULL,
1190       NULL,
1191       NULL
1192    },
1193    {
1194       MESA_FORMAT_ABGR2101010_UINT,
1195       NULL,
1196       NULL,
1197       NULL
1198    },
1199    {
1200       MESA_FORMAT_XRGB4444_UNORM,
1201       NULL,
1202       NULL,
1203       NULL
1204    },
1205    {
1206       MESA_FORMAT_XRGB1555_UNORM,
1207       NULL,
1208       NULL,
1209       NULL
1210    },
1211    {
1212       MESA_FORMAT_XBGR8888_SNORM,
1213       NULL,
1214       NULL,
1215       NULL
1216    },
1217    {
1218       MESA_FORMAT_XBGR8888_SRGB,
1219       NULL,
1220       NULL,
1221       NULL
1222    },
1223    {
1224       MESA_FORMAT_XBGR8888_UINT,
1225       NULL,
1226       NULL,
1227       NULL
1228    },
1229    {
1230       MESA_FORMAT_XBGR8888_SINT,
1231       NULL,
1232       NULL,
1233       NULL
1234    },
1235    {
1236       MESA_FORMAT_XRGB2101010_UNORM,
1237       NULL,
1238       NULL,
1239       NULL
1240    },
1241    {
1242       MESA_FORMAT_XBGR16161616_UNORM,
1243       fetch_texel_1d_xbgr16161616_unorm,
1244       fetch_texel_2d_xbgr16161616_unorm,
1245       fetch_texel_3d_xbgr16161616_unorm
1246    },
1247    {
1248       MESA_FORMAT_XBGR16161616_SNORM,
1249       NULL,
1250       NULL,
1251       NULL
1252    },
1253    {
1254       MESA_FORMAT_XBGR16161616_FLOAT,
1255       fetch_texel_1d_xbgr16161616_float,
1256       fetch_texel_2d_xbgr16161616_float,
1257       fetch_texel_3d_xbgr16161616_float
1258    },
1259    {
1260       MESA_FORMAT_XBGR16161616_UINT,
1261       NULL,
1262       NULL,
1263       NULL
1264    },
1265    {
1266       MESA_FORMAT_XBGR16161616_SINT,
1267       NULL,
1268       NULL,
1269       NULL
1270    },
1271    {
1272       MESA_FORMAT_XBGR32323232_FLOAT,
1273       fetch_texel_1d_xbgr32323232_float,
1274       fetch_texel_2d_xbgr32323232_float,
1275       fetch_texel_3d_xbgr32323232_float
1276    },
1277    {
1278       MESA_FORMAT_XBGR32323232_UINT,
1279       NULL,
1280       NULL,
1281       NULL
1282    },
1283    {
1284       MESA_FORMAT_XBGR32323232_SINT,
1285       NULL,
1286       NULL,
1287       NULL
1288    },
1289    {
1290       MESA_FORMAT_ABGR2101010,
1291       NULL,
1292       NULL,
1293       NULL
1294    },
1295 };
1296
1297
1298 /**
1299  * Initialize the texture image's FetchTexel methods.
1300  */
1301 static void
1302 set_fetch_functions(const struct gl_sampler_object *samp,
1303                     struct swrast_texture_image *texImage, GLuint dims)
1304 {
1305    gl_format format = texImage->Base.TexFormat;
1306
1307 #ifdef DEBUG
1308    /* check that the table entries are sorted by format name */
1309    gl_format fmt;
1310    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
1311       assert(texfetch_funcs[fmt].Name == fmt);
1312    }
1313 #endif
1314
1315    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
1316
1317    if (samp->sRGBDecode == GL_SKIP_DECODE_EXT &&
1318        _mesa_get_format_color_encoding(format) == GL_SRGB) {
1319       format = _mesa_get_srgb_format_linear(format);
1320    }
1321
1322    assert(format < MESA_FORMAT_COUNT);
1323
1324    switch (dims) {
1325    case 1:
1326       texImage->FetchTexel = texfetch_funcs[format].Fetch1D;
1327       break;
1328    case 2:
1329       texImage->FetchTexel = texfetch_funcs[format].Fetch2D;
1330       break;
1331    case 3:
1332       texImage->FetchTexel = texfetch_funcs[format].Fetch3D;
1333       break;
1334    default:
1335       assert(!"Bad dims in set_fetch_functions()");
1336    }
1337
1338    texImage->FetchCompressedTexel = _mesa_get_compressed_fetch_func(format);
1339
1340    ASSERT(texImage->FetchTexel);
1341 }
1342
1343 void
1344 _mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit)
1345 {
1346    struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
1347    struct gl_sampler_object *samp;
1348    GLuint face, i;
1349    GLuint dims;
1350
1351    if (!texObj)
1352       return;
1353
1354    samp = _mesa_get_samplerobj(ctx, unit);
1355
1356    dims = _mesa_get_texture_dimensions(texObj->Target);
1357
1358    for (face = 0; face < 6; face++) {
1359       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
1360          if (texObj->Image[face][i]) {
1361             set_fetch_functions(samp,
1362                                 swrast_texture_image(texObj->Image[face][i]),
1363                                 dims);
1364          }
1365       }
1366    }
1367 }