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 OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  * OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /**
  29  * \file s_texfetch.c
  30  *
  31  * Texel fetch/store functions
  32  *
  33  * \author Gareth Hughes
  34  */
  35
  36
  37 #include "main/colormac.h"
  38 #include "main/macros.h"
  39 #include "main/texcompress.h"
  40 #include "main/texcompress_fxt1.h"
  41 #include "main/texcompress_s3tc.h"
  42 #include "main/texcompress_rgtc.h"
  43 #include "main/texcompress_etc.h"
  44 #include "main/teximage.h"
  45 #include "main/samplerobj.h"
  46 #include "s_context.h"
  47 #include "s_texfetch.h"
  48 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
  49 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
  50
  51
  52 /**
  53  * Convert an 8-bit sRGB value from non-linear space to a
  54  * linear RGB value in [0, 1].
  55  * Implemented with a 256-entry lookup table.
  56  */
  57 static inline GLfloat
  58 nonlinear_to_linear(GLubyte cs8)
  59 {
  60    static GLfloat table[256];
  61    static GLboolean tableReady = GL_FALSE;
  62    if (!tableReady) {
  63       /* compute lookup table now */
  64       GLuint i;
  65       for (i = 0; i < 256; i++) {
  66          const GLfloat cs = UBYTE_TO_FLOAT(i);
  67          if (cs <= 0.04045) {
  68             table[i] = cs / 12.92f;
  69          }
  70          else {
  71             table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
  72          }
  73       }
  74       tableReady = GL_TRUE;
  75    }
  76    return table[cs8];
  77 }
  78
  79
  80
  81 /* Texel fetch routines for all supported formats
  82  */
  83 #define DIM 1
  84 #include "s_texfetch_tmp.h"
  85
  86 #define DIM 2
  87 #include "s_texfetch_tmp.h"
  88
  89 #define DIM 3
  90 #include "s_texfetch_tmp.h"
  91
  92
  93 /**
  94  * All compressed texture texel fetching is done though this function.
  95  * Basically just call a core-Mesa texel fetch function.
  96  */
  97 static void
  98 fetch_compressed(const struct swrast_texture_image *swImage,
  99                  GLint i, GLint j, GLint k, GLfloat *texel)
 100 {
 101    /* The FetchCompressedTexel function takes an integer pixel rowstride,
 102     * while the image's rowstride is bytes per row of blocks.
 103     */
 104    GLuint bw, bh;
 105    GLuint texelBytes = _mesa_get_format_bytes(swImage->Base.TexFormat);
 106    _mesa_get_format_block_size(swImage->Base.TexFormat, &bw, &bh);
 107    assert(swImage->RowStride * bw % texelBytes == 0);
 108
 109    swImage->FetchCompressedTexel(swImage->ImageSlices[k],
 110                                  swImage->RowStride * bw / texelBytes,
 111                                  i, j, texel);
 112 }
 113
 114
 115
 116 /**
 117  * Null texel fetch function.
 118  *
 119  * Have to have this so the FetchTexel function pointer is never NULL.
 120  */
 121 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
 122                                GLint i, GLint j, GLint k, GLfloat *texel )
 123 {
 124    (void) texImage; (void) i; (void) j; (void) k;
 125    texel[RCOMP] = 0.0;
 126    texel[GCOMP] = 0.0;
 127    texel[BCOMP] = 0.0;
 128    texel[ACOMP] = 0.0;
 129    _mesa_warning(NULL, "fetch_null_texelf() called!");
 130 }
 131
 132
 133 /**
 134  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 135  * XXX this is somewhat temporary.
 136  */
 137 static struct {
 138    gl_format Name;
 139    FetchTexelFunc Fetch1D;
 140    FetchTexelFunc Fetch2D;
 141    FetchTexelFunc Fetch3D;
 142 }
 143 texfetch_funcs[] =
 144 {
 145    {
 146       MESA_FORMAT_NONE,
 147       fetch_null_texelf,
 148       fetch_null_texelf,
 149       fetch_null_texelf
 150    },
 151
 152    {
 153       MESA_FORMAT_RGBA8888,
 154       fetch_texel_1d_f_rgba8888,
 155       fetch_texel_2d_f_rgba8888,
 156       fetch_texel_3d_f_rgba8888
 157    },
 158    {
 159       MESA_FORMAT_RGBA8888_REV,
 160       fetch_texel_1d_f_rgba8888_rev,
 161       fetch_texel_2d_f_rgba8888_rev,
 162       fetch_texel_3d_f_rgba8888_rev
 163    },
 164    {
 165       MESA_FORMAT_ARGB8888,
 166       fetch_texel_1d_f_argb8888,
 167       fetch_texel_2d_f_argb8888,
 168       fetch_texel_3d_f_argb8888
 169    },
 170    {
 171       MESA_FORMAT_ARGB8888_REV,
 172       fetch_texel_1d_f_argb8888_rev,
 173       fetch_texel_2d_f_argb8888_rev,
 174       fetch_texel_3d_f_argb8888_rev
 175    },
 176    {
 177       MESA_FORMAT_RGBX8888,
 178       fetch_texel_1d_f_rgbx8888,
 179       fetch_texel_2d_f_rgbx8888,
 180       fetch_texel_3d_f_rgbx8888
 181    },
 182    {
 183       MESA_FORMAT_RGBX8888_REV,
 184       fetch_texel_1d_f_rgbx8888_rev,
 185       fetch_texel_2d_f_rgbx8888_rev,
 186       fetch_texel_3d_f_rgbx8888_rev
 187    },
 188    {
 189       MESA_FORMAT_XRGB8888,
 190       fetch_texel_1d_f_xrgb8888,
 191       fetch_texel_2d_f_xrgb8888,
 192       fetch_texel_3d_f_xrgb8888
 193    },
 194    {
 195       MESA_FORMAT_XRGB8888_REV,
 196       fetch_texel_1d_f_xrgb8888_rev,
 197       fetch_texel_2d_f_xrgb8888_rev,
 198       fetch_texel_3d_f_xrgb8888_rev
 199    },
 200    {
 201       MESA_FORMAT_RGB888,
 202       fetch_texel_1d_f_rgb888,
 203       fetch_texel_2d_f_rgb888,
 204       fetch_texel_3d_f_rgb888
 205    },
 206    {
 207       MESA_FORMAT_BGR888,
 208       fetch_texel_1d_f_bgr888,
 209       fetch_texel_2d_f_bgr888,
 210       fetch_texel_3d_f_bgr888
 211    },
 212    {
 213       MESA_FORMAT_RGB565,
 214       fetch_texel_1d_f_rgb565,
 215       fetch_texel_2d_f_rgb565,
 216       fetch_texel_3d_f_rgb565
 217    },
 218    {
 219       MESA_FORMAT_RGB565_REV,
 220       fetch_texel_1d_f_rgb565_rev,
 221       fetch_texel_2d_f_rgb565_rev,
 222       fetch_texel_3d_f_rgb565_rev
 223    },
 224    {
 225       MESA_FORMAT_ARGB4444,
 226       fetch_texel_1d_f_argb4444,
 227       fetch_texel_2d_f_argb4444,
 228       fetch_texel_3d_f_argb4444
 229    },
 230    {
 231       MESA_FORMAT_ARGB4444_REV,
 232       fetch_texel_1d_f_argb4444_rev,
 233       fetch_texel_2d_f_argb4444_rev,
 234       fetch_texel_3d_f_argb4444_rev
 235    },
 236    {
 237       MESA_FORMAT_RGBA5551,
 238       fetch_texel_1d_f_rgba5551,
 239       fetch_texel_2d_f_rgba5551,
 240       fetch_texel_3d_f_rgba5551
 241    },
 242    {
 243       MESA_FORMAT_ARGB1555,
 244       fetch_texel_1d_f_argb1555,
 245       fetch_texel_2d_f_argb1555,
 246       fetch_texel_3d_f_argb1555
 247    },
 248    {
 249       MESA_FORMAT_ARGB1555_REV,
 250       fetch_texel_1d_f_argb1555_rev,
 251       fetch_texel_2d_f_argb1555_rev,
 252       fetch_texel_3d_f_argb1555_rev
 253    },
 254    {
 255       MESA_FORMAT_AL44,
 256       fetch_texel_1d_f_al44,
 257       fetch_texel_2d_f_al44,
 258       fetch_texel_3d_f_al44
 259    },
 260    {
 261       MESA_FORMAT_AL88,
 262       fetch_texel_1d_f_al88,
 263       fetch_texel_2d_f_al88,
 264       fetch_texel_3d_f_al88
 265    },
 266    {
 267       MESA_FORMAT_AL88_REV,
 268       fetch_texel_1d_f_al88_rev,
 269       fetch_texel_2d_f_al88_rev,
 270       fetch_texel_3d_f_al88_rev
 271    },
 272    {
 273       MESA_FORMAT_AL1616,
 274       fetch_texel_1d_f_al1616,
 275       fetch_texel_2d_f_al1616,
 276       fetch_texel_3d_f_al1616
 277    },
 278    {
 279       MESA_FORMAT_AL1616_REV,
 280       fetch_texel_1d_f_al1616_rev,
 281       fetch_texel_2d_f_al1616_rev,
 282       fetch_texel_3d_f_al1616_rev
 283    },
 284    {
 285       MESA_FORMAT_RGB332,
 286       fetch_texel_1d_f_rgb332,
 287       fetch_texel_2d_f_rgb332,
 288       fetch_texel_3d_f_rgb332
 289    },
 290    {
 291       MESA_FORMAT_A8,
 292       fetch_texel_1d_f_a8,
 293       fetch_texel_2d_f_a8,
 294       fetch_texel_3d_f_a8
 295    },
 296    {
 297       MESA_FORMAT_A16,
 298       fetch_texel_1d_f_a16,
 299       fetch_texel_2d_f_a16,
 300       fetch_texel_3d_f_a16
 301    },
 302    {
 303       MESA_FORMAT_L8,
 304       fetch_texel_1d_f_l8,
 305       fetch_texel_2d_f_l8,
 306       fetch_texel_3d_f_l8
 307    },
 308    {
 309       MESA_FORMAT_L16,
 310       fetch_texel_1d_f_l16,
 311       fetch_texel_2d_f_l16,
 312       fetch_texel_3d_f_l16
 313    },
 314    {
 315       MESA_FORMAT_I8,
 316       fetch_texel_1d_f_i8,
 317       fetch_texel_2d_f_i8,
 318       fetch_texel_3d_f_i8
 319    },
 320    {
 321       MESA_FORMAT_I16,
 322       fetch_texel_1d_f_i16,
 323       fetch_texel_2d_f_i16,
 324       fetch_texel_3d_f_i16
 325    },
 326    {
 327       MESA_FORMAT_YCBCR,
 328       fetch_texel_1d_f_ycbcr,
 329       fetch_texel_2d_f_ycbcr,
 330       fetch_texel_3d_f_ycbcr
 331    },
 332    {
 333       MESA_FORMAT_YCBCR_REV,
 334       fetch_texel_1d_f_ycbcr_rev,
 335       fetch_texel_2d_f_ycbcr_rev,
 336       fetch_texel_3d_f_ycbcr_rev
 337    },
 338    {
 339       MESA_FORMAT_R8,
 340       fetch_texel_1d_f_r8,
 341       fetch_texel_2d_f_r8,
 342       fetch_texel_3d_f_r8
 343    },
 344    {
 345       MESA_FORMAT_GR88,
 346       fetch_texel_1d_f_gr88,
 347       fetch_texel_2d_f_gr88,
 348       fetch_texel_3d_f_gr88
 349    },
 350    {
 351       MESA_FORMAT_RG88,
 352       fetch_texel_1d_f_rg88,
 353       fetch_texel_2d_f_rg88,
 354       fetch_texel_3d_f_rg88
 355    },
 356    {
 357       MESA_FORMAT_R16,
 358       fetch_texel_1d_f_r16,
 359       fetch_texel_2d_f_r16,
 360       fetch_texel_3d_f_r16
 361    },
 362    {
 363       MESA_FORMAT_GR1616,
 364       fetch_texel_1d_f_rg1616,
 365       fetch_texel_2d_f_rg1616,
 366       fetch_texel_3d_f_rg1616
 367    },
 368    {
 369       MESA_FORMAT_RG1616,
 370       fetch_texel_1d_f_rg1616_rev,
 371       fetch_texel_2d_f_rg1616_rev,
 372       fetch_texel_3d_f_rg1616_rev
 373    },
 374    {
 375       MESA_FORMAT_ARGB2101010,
 376       fetch_texel_1d_f_argb2101010,
 377       fetch_texel_2d_f_argb2101010,
 378       fetch_texel_3d_f_argb2101010
 379    },
 380    {
 381       MESA_FORMAT_Z24_S8,
 382       fetch_texel_1d_f_z24_s8,
 383       fetch_texel_2d_f_z24_s8,
 384       fetch_texel_3d_f_z24_s8
 385    },
 386    {
 387       MESA_FORMAT_S8_Z24,
 388       fetch_texel_1d_f_s8_z24,
 389       fetch_texel_2d_f_s8_z24,
 390       fetch_texel_3d_f_s8_z24
 391    },
 392    {
 393       MESA_FORMAT_Z16,
 394       fetch_texel_1d_f_z16,
 395       fetch_texel_2d_f_z16,
 396       fetch_texel_3d_f_z16
 397    },
 398    {
 399       MESA_FORMAT_X8_Z24,
 400       fetch_texel_1d_f_s8_z24,
 401       fetch_texel_2d_f_s8_z24,
 402       fetch_texel_3d_f_s8_z24
 403    },
 404    {
 405       MESA_FORMAT_Z24_X8,
 406       fetch_texel_1d_f_z24_s8,
 407       fetch_texel_2d_f_z24_s8,
 408       fetch_texel_3d_f_z24_s8
 409    },
 410    {
 411       MESA_FORMAT_Z32,
 412       fetch_texel_1d_f_z32,
 413       fetch_texel_2d_f_z32,
 414       fetch_texel_3d_f_z32
 415    },
 416    {
 417       MESA_FORMAT_S8,
 418       NULL,
 419       NULL,
 420       NULL
 421    },
 422    {
 423       MESA_FORMAT_SRGB8,
 424       fetch_texel_1d_srgb8,
 425       fetch_texel_2d_srgb8,
 426       fetch_texel_3d_srgb8
 427    },
 428    {
 429       MESA_FORMAT_SRGBA8,
 430       fetch_texel_1d_srgba8,
 431       fetch_texel_2d_srgba8,
 432       fetch_texel_3d_srgba8
 433    },
 434    {
 435       MESA_FORMAT_SARGB8,
 436       fetch_texel_1d_sargb8,
 437       fetch_texel_2d_sargb8,
 438       fetch_texel_3d_sargb8
 439    },
 440    {
 441       MESA_FORMAT_SL8,
 442       fetch_texel_1d_sl8,
 443       fetch_texel_2d_sl8,
 444       fetch_texel_3d_sl8
 445    },
 446    {
 447       MESA_FORMAT_SLA8,
 448       fetch_texel_1d_sla8,
 449       fetch_texel_2d_sla8,
 450       fetch_texel_3d_sla8
 451    },
 452    {
 453       MESA_FORMAT_SRGB_DXT1,
 454       fetch_compressed,
 455       fetch_compressed,
 456       fetch_compressed
 457    },
 458    {
 459       MESA_FORMAT_SRGBA_DXT1,
 460       fetch_compressed,
 461       fetch_compressed,
 462       fetch_compressed
 463    },
 464    {
 465       MESA_FORMAT_SRGBA_DXT3,
 466       fetch_compressed,
 467       fetch_compressed,
 468       fetch_compressed
 469    },
 470    {
 471       MESA_FORMAT_SRGBA_DXT5,
 472       fetch_compressed,
 473       fetch_compressed,
 474       fetch_compressed
 475    },
 476
 477    {
 478       MESA_FORMAT_RGB_FXT1,
 479       fetch_compressed,
 480       fetch_compressed,
 481       fetch_compressed
 482    },
 483    {
 484       MESA_FORMAT_RGBA_FXT1,
 485       fetch_compressed,
 486       fetch_compressed,
 487       fetch_compressed
 488    },
 489    {
 490       MESA_FORMAT_RGB_DXT1,
 491       fetch_compressed,
 492       fetch_compressed,
 493       fetch_compressed
 494    },
 495    {
 496       MESA_FORMAT_RGBA_DXT1,
 497       fetch_compressed,
 498       fetch_compressed,
 499       fetch_compressed
 500    },
 501    {
 502       MESA_FORMAT_RGBA_DXT3,
 503       fetch_compressed,
 504       fetch_compressed,
 505       fetch_compressed
 506    },
 507    {
 508       MESA_FORMAT_RGBA_DXT5,
 509       fetch_compressed,
 510       fetch_compressed,
 511       fetch_compressed
 512    },
 513    {
 514       MESA_FORMAT_RGBA_FLOAT32,
 515       fetch_texel_1d_f_rgba_f32,
 516       fetch_texel_2d_f_rgba_f32,
 517       fetch_texel_3d_f_rgba_f32
 518    },
 519    {
 520       MESA_FORMAT_RGBA_FLOAT16,
 521       fetch_texel_1d_f_rgba_f16,
 522       fetch_texel_2d_f_rgba_f16,
 523       fetch_texel_3d_f_rgba_f16
 524    },
 525    {
 526       MESA_FORMAT_RGB_FLOAT32,
 527       fetch_texel_1d_f_rgb_f32,
 528       fetch_texel_2d_f_rgb_f32,
 529       fetch_texel_3d_f_rgb_f32
 530    },
 531    {
 532       MESA_FORMAT_RGB_FLOAT16,
 533       fetch_texel_1d_f_rgb_f16,
 534       fetch_texel_2d_f_rgb_f16,
 535       fetch_texel_3d_f_rgb_f16
 536    },
 537    {
 538       MESA_FORMAT_ALPHA_FLOAT32,
 539       fetch_texel_1d_f_alpha_f32,
 540       fetch_texel_2d_f_alpha_f32,
 541       fetch_texel_3d_f_alpha_f32
 542    },
 543    {
 544       MESA_FORMAT_ALPHA_FLOAT16,
 545       fetch_texel_1d_f_alpha_f16,
 546       fetch_texel_2d_f_alpha_f16,
 547       fetch_texel_3d_f_alpha_f16
 548    },
 549    {
 550       MESA_FORMAT_LUMINANCE_FLOAT32,
 551       fetch_texel_1d_f_luminance_f32,
 552       fetch_texel_2d_f_luminance_f32,
 553       fetch_texel_3d_f_luminance_f32
 554    },
 555    {
 556       MESA_FORMAT_LUMINANCE_FLOAT16,
 557       fetch_texel_1d_f_luminance_f16,
 558       fetch_texel_2d_f_luminance_f16,
 559       fetch_texel_3d_f_luminance_f16
 560    },
 561    {
 562       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 563       fetch_texel_1d_f_luminance_alpha_f32,
 564       fetch_texel_2d_f_luminance_alpha_f32,
 565       fetch_texel_3d_f_luminance_alpha_f32
 566    },
 567    {
 568       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 569       fetch_texel_1d_f_luminance_alpha_f16,
 570       fetch_texel_2d_f_luminance_alpha_f16,
 571       fetch_texel_3d_f_luminance_alpha_f16
 572    },
 573    {
 574       MESA_FORMAT_INTENSITY_FLOAT32,
 575       fetch_texel_1d_f_intensity_f32,
 576       fetch_texel_2d_f_intensity_f32,
 577       fetch_texel_3d_f_intensity_f32
 578    },
 579    {
 580       MESA_FORMAT_INTENSITY_FLOAT16,
 581       fetch_texel_1d_f_intensity_f16,
 582       fetch_texel_2d_f_intensity_f16,
 583       fetch_texel_3d_f_intensity_f16
 584    },
 585    {
 586       MESA_FORMAT_R_FLOAT32,
 587       fetch_texel_1d_f_r_f32,
 588       fetch_texel_2d_f_r_f32,
 589       fetch_texel_3d_f_r_f32
 590    },
 591    {
 592       MESA_FORMAT_R_FLOAT16,
 593       fetch_texel_1d_f_r_f16,
 594       fetch_texel_2d_f_r_f16,
 595       fetch_texel_3d_f_r_f16
 596    },
 597    {
 598       MESA_FORMAT_RG_FLOAT32,
 599       fetch_texel_1d_f_rg_f32,
 600       fetch_texel_2d_f_rg_f32,
 601       fetch_texel_3d_f_rg_f32
 602    },
 603    {
 604       MESA_FORMAT_RG_FLOAT16,
 605       fetch_texel_1d_f_rg_f16,
 606       fetch_texel_2d_f_rg_f16,
 607       fetch_texel_3d_f_rg_f16
 608    },
 609
 610    {
 611       MESA_FORMAT_ALPHA_UINT8,
 612       NULL,
 613       NULL,
 614       NULL
 615    },
 616
 617    {
 618       MESA_FORMAT_ALPHA_UINT16,
 619       NULL,
 620       NULL,
 621       NULL
 622    },
 623
 624    {
 625       MESA_FORMAT_ALPHA_UINT32,
 626       NULL,
 627       NULL,
 628       NULL
 629    },
 630
 631    {
 632       MESA_FORMAT_ALPHA_INT8,
 633       NULL,
 634       NULL,
 635       NULL
 636    },
 637
 638    {
 639       MESA_FORMAT_ALPHA_INT16,
 640       NULL,
 641       NULL,
 642       NULL
 643    },
 644
 645    {
 646       MESA_FORMAT_ALPHA_INT32,
 647       NULL,
 648       NULL,
 649       NULL
 650    },
 651
 652
 653    {
 654       MESA_FORMAT_INTENSITY_UINT8,
 655       NULL,
 656       NULL,
 657       NULL
 658    },
 659
 660    {
 661       MESA_FORMAT_INTENSITY_UINT16,
 662       NULL,
 663       NULL,
 664       NULL
 665    },
 666
 667    {
 668       MESA_FORMAT_INTENSITY_UINT32,
 669       NULL,
 670       NULL,
 671       NULL
 672    },
 673
 674    {
 675       MESA_FORMAT_INTENSITY_INT8,
 676       NULL,
 677       NULL,
 678       NULL
 679    },
 680
 681    {
 682       MESA_FORMAT_INTENSITY_INT16,
 683       NULL,
 684       NULL,
 685       NULL
 686    },
 687
 688    {
 689       MESA_FORMAT_INTENSITY_INT32,
 690       NULL,
 691       NULL,
 692       NULL
 693    },
 694
 695
 696    {
 697       MESA_FORMAT_LUMINANCE_UINT8,
 698       NULL,
 699       NULL,
 700       NULL
 701    },
 702
 703    {
 704       MESA_FORMAT_LUMINANCE_UINT16,
 705       NULL,
 706       NULL,
 707       NULL
 708    },
 709
 710    {
 711       MESA_FORMAT_LUMINANCE_UINT32,
 712       NULL,
 713       NULL,
 714       NULL
 715    },
 716
 717    {
 718       MESA_FORMAT_LUMINANCE_INT8,
 719       NULL,
 720       NULL,
 721       NULL
 722    },
 723
 724    {
 725       MESA_FORMAT_LUMINANCE_INT16,
 726       NULL,
 727       NULL,
 728       NULL
 729    },
 730
 731    {
 732       MESA_FORMAT_LUMINANCE_INT32,
 733       NULL,
 734       NULL,
 735       NULL
 736    },
 737
 738
 739    {
 740       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 741       NULL,
 742       NULL,
 743       NULL
 744    },
 745
 746    {
 747       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 748       NULL,
 749       NULL,
 750       NULL
 751    },
 752
 753    {
 754       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 755       NULL,
 756       NULL,
 757       NULL
 758    },
 759
 760    {
 761       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 762       NULL,
 763       NULL,
 764       NULL
 765    },
 766
 767    {
 768       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 769       NULL,
 770       NULL,
 771       NULL
 772    },
 773
 774    {
 775       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 776       NULL,
 777       NULL,
 778       NULL
 779    },
 780
 781
 782    {
 783       MESA_FORMAT_R_INT8,
 784       NULL,
 785       NULL,
 786       NULL
 787    },
 788
 789    {
 790       MESA_FORMAT_RG_INT8,
 791       NULL,
 792       NULL,
 793       NULL
 794    },
 795
 796    {
 797       MESA_FORMAT_RGB_INT8,
 798       NULL,
 799       NULL,
 800       NULL
 801    },
 802
 803    /* non-normalized, signed int */
 804    {
 805       MESA_FORMAT_RGBA_INT8,
 806       fetch_texel_1d_rgba_int8,
 807       fetch_texel_2d_rgba_int8,
 808       fetch_texel_3d_rgba_int8
 809    },
 810    {
 811       MESA_FORMAT_R_INT16,
 812       NULL,
 813       NULL,
 814       NULL
 815    },
 816    {
 817       MESA_FORMAT_RG_INT16,
 818       NULL,
 819       NULL,
 820       NULL
 821    },
 822    {
 823       MESA_FORMAT_RGB_INT16,
 824       NULL,
 825       NULL,
 826       NULL
 827    },
 828    {
 829       MESA_FORMAT_RGBA_INT16,
 830       fetch_texel_1d_rgba_int16,
 831       fetch_texel_2d_rgba_int16,
 832       fetch_texel_3d_rgba_int16
 833    },
 834    {
 835       MESA_FORMAT_R_INT32,
 836       NULL,
 837       NULL,
 838       NULL
 839    },
 840    {
 841       MESA_FORMAT_RG_INT32,
 842       NULL,
 843       NULL,
 844       NULL
 845    },
 846    {
 847       MESA_FORMAT_RGB_INT32,
 848       NULL,
 849       NULL,
 850       NULL
 851    },
 852    {
 853       MESA_FORMAT_RGBA_INT32,
 854       fetch_texel_1d_rgba_int32,
 855       fetch_texel_2d_rgba_int32,
 856       fetch_texel_3d_rgba_int32
 857    },
 858
 859    /* non-normalized, unsigned int */
 860    {
 861       MESA_FORMAT_R_UINT8,
 862       NULL,
 863       NULL,
 864       NULL
 865    },
 866    {
 867       MESA_FORMAT_RG_UINT8,
 868       NULL,
 869       NULL,
 870       NULL
 871    },
 872    {
 873       MESA_FORMAT_RGB_UINT8,
 874       NULL,
 875       NULL,
 876       NULL
 877    },
 878    {
 879       MESA_FORMAT_RGBA_UINT8,
 880       fetch_texel_1d_rgba_uint8,
 881       fetch_texel_2d_rgba_uint8,
 882       fetch_texel_3d_rgba_uint8
 883    },
 884    {
 885       MESA_FORMAT_R_UINT16,
 886       NULL,
 887       NULL,
 888       NULL
 889    },
 890    {
 891       MESA_FORMAT_RG_UINT16,
 892       NULL,
 893       NULL,
 894       NULL
 895    },
 896    {
 897       MESA_FORMAT_RGB_UINT16,
 898       NULL,
 899       NULL,
 900       NULL
 901    },
 902    {
 903       MESA_FORMAT_RGBA_UINT16,
 904       fetch_texel_1d_rgba_uint16,
 905       fetch_texel_2d_rgba_uint16,
 906       fetch_texel_3d_rgba_uint16
 907    },
 908    {
 909       MESA_FORMAT_R_UINT32,
 910       NULL,
 911       NULL,
 912       NULL
 913    },
 914    {
 915       MESA_FORMAT_RG_UINT32,
 916       NULL,
 917       NULL,
 918       NULL
 919    },
 920    {
 921       MESA_FORMAT_RGB_UINT32,
 922       NULL,
 923       NULL,
 924       NULL
 925    },
 926    {
 927       MESA_FORMAT_RGBA_UINT32,
 928       fetch_texel_1d_rgba_uint32,
 929       fetch_texel_2d_rgba_uint32,
 930       fetch_texel_3d_rgba_uint32
 931    },
 932
 933    /* dudv */
 934    {
 935       MESA_FORMAT_DUDV8,
 936       fetch_texel_1d_dudv8,
 937       fetch_texel_2d_dudv8,
 938       fetch_texel_3d_dudv8
 939    },
 940
 941    /* signed, normalized */
 942    {
 943       MESA_FORMAT_SIGNED_R8,
 944       fetch_texel_1d_signed_r8,
 945       fetch_texel_2d_signed_r8,
 946       fetch_texel_3d_signed_r8
 947    },
 948    {
 949       MESA_FORMAT_SIGNED_RG88_REV,
 950       fetch_texel_1d_signed_rg88_rev,
 951       fetch_texel_2d_signed_rg88_rev,
 952       fetch_texel_3d_signed_rg88_rev
 953    },
 954    {
 955       MESA_FORMAT_SIGNED_RGBX8888,
 956       fetch_texel_1d_signed_rgbx8888,
 957       fetch_texel_2d_signed_rgbx8888,
 958       fetch_texel_3d_signed_rgbx8888
 959    },
 960    {
 961       MESA_FORMAT_SIGNED_RGBA8888,
 962       fetch_texel_1d_signed_rgba8888,
 963       fetch_texel_2d_signed_rgba8888,
 964       fetch_texel_3d_signed_rgba8888
 965    },
 966    {
 967       MESA_FORMAT_SIGNED_RGBA8888_REV,
 968       fetch_texel_1d_signed_rgba8888_rev,
 969       fetch_texel_2d_signed_rgba8888_rev,
 970       fetch_texel_3d_signed_rgba8888_rev
 971    },
 972    {
 973       MESA_FORMAT_SIGNED_R16,
 974       fetch_texel_1d_signed_r16,
 975       fetch_texel_2d_signed_r16,
 976       fetch_texel_3d_signed_r16
 977    },
 978    {
 979       MESA_FORMAT_SIGNED_GR1616,
 980       fetch_texel_1d_signed_rg1616,
 981       fetch_texel_2d_signed_rg1616,
 982       fetch_texel_3d_signed_rg1616
 983    },
 984    {
 985       MESA_FORMAT_SIGNED_RGB_16,
 986       fetch_texel_1d_signed_rgb_16,
 987       fetch_texel_2d_signed_rgb_16,
 988       fetch_texel_3d_signed_rgb_16
 989    },
 990    {
 991       MESA_FORMAT_SIGNED_RGBA_16,
 992       fetch_texel_1d_signed_rgba_16,
 993       fetch_texel_2d_signed_rgba_16,
 994       fetch_texel_3d_signed_rgba_16
 995    },
 996    {
 997       MESA_FORMAT_RGBA_16,
 998       fetch_texel_1d_rgba_16,
 999       fetch_texel_2d_rgba_16,
1000       fetch_texel_3d_rgba_16
1001    },
1002    {
1003       MESA_FORMAT_RED_RGTC1,
1004       fetch_compressed,
1005       fetch_compressed,
1006       fetch_compressed
1007    },
1008    {
1009       MESA_FORMAT_SIGNED_RED_RGTC1,
1010       fetch_compressed,
1011       fetch_compressed,
1012       fetch_compressed
1013    },
1014    {
1015       MESA_FORMAT_RG_RGTC2,
1016       fetch_compressed,
1017       fetch_compressed,
1018       fetch_compressed
1019    },
1020    {
1021       MESA_FORMAT_SIGNED_RG_RGTC2,
1022       fetch_compressed,
1023       fetch_compressed,
1024       fetch_compressed
1025    },
1026    {
1027       MESA_FORMAT_L_LATC1,
1028       fetch_compressed,
1029       fetch_compressed,
1030       fetch_compressed
1031    },
1032    {
1033       MESA_FORMAT_SIGNED_L_LATC1,
1034       fetch_compressed,
1035       fetch_compressed,
1036       fetch_compressed
1037    },
1038    {
1039       MESA_FORMAT_LA_LATC2,
1040       fetch_compressed,
1041       fetch_compressed,
1042       fetch_compressed
1043    },
1044    {
1045       MESA_FORMAT_SIGNED_LA_LATC2,
1046       fetch_compressed,
1047       fetch_compressed,
1048       fetch_compressed
1049    },
1050    {
1051       MESA_FORMAT_ETC1_RGB8,
1052       fetch_compressed,
1053       fetch_compressed,
1054       fetch_compressed
1055    },
1056    {
1057       MESA_FORMAT_ETC2_RGB8,
1058       fetch_compressed,
1059       fetch_compressed,
1060       fetch_compressed
1061    },
1062    {
1063       MESA_FORMAT_ETC2_SRGB8,
1064       fetch_compressed,
1065       fetch_compressed,
1066       fetch_compressed
1067    },
1068    {
1069       MESA_FORMAT_ETC2_RGBA8_EAC,
1070       fetch_compressed,
1071       fetch_compressed,
1072       fetch_compressed
1073    },
1074    {
1075       MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC,
1076       fetch_compressed,
1077       fetch_compressed,
1078       fetch_compressed
1079    },
1080    {
1081       MESA_FORMAT_ETC2_R11_EAC,
1082       fetch_compressed,
1083       fetch_compressed,
1084       fetch_compressed
1085    },
1086    {
1087       MESA_FORMAT_ETC2_RG11_EAC,
1088       fetch_compressed,
1089       fetch_compressed,
1090       fetch_compressed
1091    },
1092    {
1093       MESA_FORMAT_ETC2_SIGNED_R11_EAC,
1094       fetch_compressed,
1095       fetch_compressed,
1096       fetch_compressed
1097    },
1098    {
1099       MESA_FORMAT_ETC2_SIGNED_RG11_EAC,
1100       fetch_compressed,
1101       fetch_compressed,
1102       fetch_compressed
1103    },
1104    {
1105       MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
1106       fetch_compressed,
1107       fetch_compressed,
1108       fetch_compressed
1109    },
1110    {
1111       MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1,
1112       fetch_compressed,
1113       fetch_compressed,
1114       fetch_compressed
1115    },
1116    {
1117       MESA_FORMAT_SIGNED_A8,
1118       fetch_texel_1d_signed_a8,
1119       fetch_texel_2d_signed_a8,
1120       fetch_texel_3d_signed_a8
1121    },
1122    {
1123       MESA_FORMAT_SIGNED_L8,
1124       fetch_texel_1d_signed_l8,
1125       fetch_texel_2d_signed_l8,
1126       fetch_texel_3d_signed_l8
1127    },
1128    {
1129       MESA_FORMAT_SIGNED_AL88,
1130       fetch_texel_1d_signed_al88,
1131       fetch_texel_2d_signed_al88,
1132       fetch_texel_3d_signed_al88
1133    },
1134    {
1135       MESA_FORMAT_SIGNED_I8,
1136       fetch_texel_1d_signed_i8,
1137       fetch_texel_2d_signed_i8,
1138       fetch_texel_3d_signed_i8
1139    },
1140    {
1141       MESA_FORMAT_SIGNED_A16,
1142       fetch_texel_1d_signed_a16,
1143       fetch_texel_2d_signed_a16,
1144       fetch_texel_3d_signed_a16
1145    },
1146    {
1147       MESA_FORMAT_SIGNED_L16,
1148       fetch_texel_1d_signed_l16,
1149       fetch_texel_2d_signed_l16,
1150       fetch_texel_3d_signed_l16
1151    },
1152    {
1153       MESA_FORMAT_SIGNED_AL1616,
1154       fetch_texel_1d_signed_al1616,
1155       fetch_texel_2d_signed_al1616,
1156       fetch_texel_3d_signed_al1616
1157    },
1158    {
1159       MESA_FORMAT_SIGNED_I16,
1160       fetch_texel_1d_signed_i16,
1161       fetch_texel_2d_signed_i16,
1162       fetch_texel_3d_signed_i16
1163    },
1164    {
1165       MESA_FORMAT_RGB9_E5_FLOAT,
1166       fetch_texel_1d_rgb9_e5,
1167       fetch_texel_2d_rgb9_e5,
1168       fetch_texel_3d_rgb9_e5
1169    },
1170    {
1171       MESA_FORMAT_R11_G11_B10_FLOAT,
1172       fetch_texel_1d_r11_g11_b10f,
1173       fetch_texel_2d_r11_g11_b10f,
1174       fetch_texel_3d_r11_g11_b10f
1175    },
1176    {
1177       MESA_FORMAT_Z32_FLOAT,
1178       fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
1179       fetch_texel_2d_f_r_f32,
1180       fetch_texel_3d_f_r_f32
1181    },
1182    {
1183       MESA_FORMAT_Z32_FLOAT_X24S8,
1184       fetch_texel_1d_z32f_x24s8,
1185       fetch_texel_2d_z32f_x24s8,
1186       fetch_texel_3d_z32f_x24s8
1187    },
1188    {
1189       MESA_FORMAT_ARGB2101010_UINT,
1190       NULL,
1191       NULL,
1192       NULL
1193    },
1194    {
1195       MESA_FORMAT_ABGR2101010_UINT,
1196       NULL,
1197       NULL,
1198       NULL
1199    },
1200    {
1201       MESA_FORMAT_XRGB4444_UNORM,
1202       NULL,
1203       NULL,
1204       NULL
1205    },
1206    {
1207       MESA_FORMAT_XRGB1555_UNORM,
1208       NULL,
1209       NULL,
1210       NULL
1211    },
1212    {
1213       MESA_FORMAT_XBGR8888_SNORM,
1214       NULL,
1215       NULL,
1216       NULL
1217    },
1218    {
1219       MESA_FORMAT_XBGR8888_SRGB,
1220       NULL,
1221       NULL,
1222       NULL
1223    },
1224    {
1225       MESA_FORMAT_XBGR8888_UINT,
1226       NULL,
1227       NULL,
1228       NULL
1229    },
1230    {
1231       MESA_FORMAT_XBGR8888_SINT,
1232       NULL,
1233       NULL,
1234       NULL
1235    },
1236    {
1237       MESA_FORMAT_XRGB2101010_UNORM,
1238       NULL,
1239       NULL,
1240       NULL
1241    },
1242    {
1243       MESA_FORMAT_XBGR16161616_UNORM,
1244       NULL,
1245       NULL,
1246       NULL
1247    },
1248    {
1249       MESA_FORMAT_XBGR16161616_SNORM,
1250       NULL,
1251       NULL,
1252       NULL
1253    },
1254    {
1255       MESA_FORMAT_XBGR16161616_FLOAT,
1256       NULL,
1257       NULL,
1258       NULL
1259    },
1260    {
1261       MESA_FORMAT_XBGR16161616_UINT,
1262       NULL,
1263       NULL,
1264       NULL
1265    },
1266    {
1267       MESA_FORMAT_XBGR16161616_SINT,
1268       NULL,
1269       NULL,
1270       NULL
1271    },
1272    {
1273       MESA_FORMAT_XBGR32323232_FLOAT,
1274       NULL,
1275       NULL,
1276       NULL
1277    },
1278    {
1279       MESA_FORMAT_XBGR32323232_UINT,
1280       NULL,
1281       NULL,
1282       NULL
1283    },
1284    {
1285       MESA_FORMAT_XBGR32323232_SINT,
1286       NULL,
1287       NULL,
1288       NULL
1289    },
1290 };
1291
1292
1293 /**
1294  * Initialize the texture image's FetchTexel methods.
1295  */
1296 static void
1297 set_fetch_functions(const struct gl_sampler_object *samp,
1298                     struct swrast_texture_image *texImage, GLuint dims)
1299 {
1300    gl_format format = texImage->Base.TexFormat;
1301
1302 #ifdef DEBUG
1303    /* check that the table entries are sorted by format name */
1304    gl_format fmt;
1305    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
1306       assert(texfetch_funcs[fmt].Name == fmt);
1307    }
1308 #endif
1309
1310    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
1311
1312    if (samp->sRGBDecode == GL_SKIP_DECODE_EXT &&
1313        _mesa_get_format_color_encoding(format) == GL_SRGB) {
1314       format = _mesa_get_srgb_format_linear(format);
1315    }
1316
1317    assert(format < MESA_FORMAT_COUNT);
1318
1319    switch (dims) {
1320    case 1:
1321       texImage->FetchTexel = texfetch_funcs[format].Fetch1D;
1322       break;
1323    case 2:
1324       texImage->FetchTexel = texfetch_funcs[format].Fetch2D;
1325       break;
1326    case 3:
1327       texImage->FetchTexel = texfetch_funcs[format].Fetch3D;
1328       break;
1329    default:
1330       assert(!"Bad dims in set_fetch_functions()");
1331    }
1332
1333    texImage->FetchCompressedTexel = _mesa_get_compressed_fetch_func(format);
1334
1335    ASSERT(texImage->FetchTexel);
1336 }
1337
1338 void
1339 _mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit)
1340 {
1341    struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
1342    struct gl_sampler_object *samp;
1343    GLuint face, i;
1344    GLuint dims;
1345
1346    if (!texObj)
1347       return;
1348
1349    samp = _mesa_get_samplerobj(ctx, unit);
1350
1351    dims = _mesa_get_texture_dimensions(texObj->Target);
1352
1353    for (face = 0; face < 6; face++) {
1354       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
1355          if (texObj->Image[face][i]) {
1356             set_fetch_functions(samp,
1357                                 swrast_texture_image(texObj->Image[face][i]),
1358                                 dims);
1359          }
1360       }
1361    }
1362 }