reactos/dll/opengl/mesa/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  * BRIAN PAUL 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 "s_context.h"
  45 #include "s_texfetch.h"
  46 #if 0
  47 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
  48 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
  49 #else
  50 #include "../main/u_format_rgb9e5.h"
  51 #include "../main/u_format_r11g11b10f.h"
  52 #endif
  53
  54
  55 /**
  56  * Convert an 8-bit sRGB value from non-linear space to a
  57  * linear RGB value in [0, 1].
  58  * Implemented with a 256-entry lookup table.
  59  */
  60 static inline GLfloat
  61 nonlinear_to_linear(GLubyte cs8)
  62 {
  63    static GLfloat table[256];
  64    static GLboolean tableReady = GL_FALSE;
  65    if (!tableReady) {
  66       /* compute lookup table now */
  67       GLuint i;
  68       for (i = 0; i < 256; i++) {
  69          const GLfloat cs = UBYTE_TO_FLOAT(i);
  70          if (cs <= 0.04045) {
  71             table[i] = cs / 12.92f;
  72          }
  73          else {
  74             table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
  75          }
  76       }
  77       tableReady = GL_TRUE;
  78    }
  79    return table[cs8];
  80 }
  81
  82
  83
  84 /* Texel fetch routines for all supported formats
  85  */
  86 #define DIM 1
  87 #include "s_texfetch_tmp.h"
  88
  89 #define DIM 2
  90 #include "s_texfetch_tmp.h"
  91
  92 #define DIM 3
  93 #include "s_texfetch_tmp.h"
  94
  95 /**
  96  * Null texel fetch function.
  97  *
  98  * Have to have this so the FetchTexel function pointer is never NULL.
  99  */
 100 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
 101                                GLint i, GLint j, GLint k, GLfloat *texel )
 102 {
 103    (void) texImage; (void) i; (void) j; (void) k;
 104    texel[RCOMP] = 0.0;
 105    texel[GCOMP] = 0.0;
 106    texel[BCOMP] = 0.0;
 107    texel[ACOMP] = 0.0;
 108    _mesa_warning(NULL, "fetch_null_texelf() called!");
 109 }
 110
 111
 112 /**
 113  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 114  * XXX this is somewhat temporary.
 115  */
 116 static struct {
 117    gl_format Name;
 118    FetchTexelFunc Fetch1D;
 119    FetchTexelFunc Fetch2D;
 120    FetchTexelFunc Fetch3D;
 121 }
 122 texfetch_funcs[MESA_FORMAT_COUNT] =
 123 {
 124    {
 125       MESA_FORMAT_NONE,
 126       fetch_null_texelf,
 127       fetch_null_texelf,
 128       fetch_null_texelf
 129    },
 130
 131    {
 132       MESA_FORMAT_RGBA8888,
 133       fetch_texel_1d_f_rgba8888,
 134       fetch_texel_2d_f_rgba8888,
 135       fetch_texel_3d_f_rgba8888
 136    },
 137    {
 138       MESA_FORMAT_RGBA8888_REV,
 139       fetch_texel_1d_f_rgba8888_rev,
 140       fetch_texel_2d_f_rgba8888_rev,
 141       fetch_texel_3d_f_rgba8888_rev
 142    },
 143    {
 144       MESA_FORMAT_ARGB8888,
 145       fetch_texel_1d_f_argb8888,
 146       fetch_texel_2d_f_argb8888,
 147       fetch_texel_3d_f_argb8888
 148    },
 149    {
 150       MESA_FORMAT_ARGB8888_REV,
 151       fetch_texel_1d_f_argb8888_rev,
 152       fetch_texel_2d_f_argb8888_rev,
 153       fetch_texel_3d_f_argb8888_rev
 154    },
 155    {
 156       MESA_FORMAT_RGBX8888,
 157       fetch_texel_1d_f_rgbx8888,
 158       fetch_texel_2d_f_rgbx8888,
 159       fetch_texel_3d_f_rgbx8888
 160    },
 161    {
 162       MESA_FORMAT_RGBX8888_REV,
 163       fetch_texel_1d_f_rgbx8888_rev,
 164       fetch_texel_2d_f_rgbx8888_rev,
 165       fetch_texel_3d_f_rgbx8888_rev
 166    },
 167    {
 168       MESA_FORMAT_XRGB8888,
 169       fetch_texel_1d_f_xrgb8888,
 170       fetch_texel_2d_f_xrgb8888,
 171       fetch_texel_3d_f_xrgb8888
 172    },
 173    {
 174       MESA_FORMAT_XRGB8888_REV,
 175       fetch_texel_1d_f_xrgb8888_rev,
 176       fetch_texel_2d_f_xrgb8888_rev,
 177       fetch_texel_3d_f_xrgb8888_rev
 178    },
 179    {
 180       MESA_FORMAT_RGB888,
 181       fetch_texel_1d_f_rgb888,
 182       fetch_texel_2d_f_rgb888,
 183       fetch_texel_3d_f_rgb888
 184    },
 185    {
 186       MESA_FORMAT_BGR888,
 187       fetch_texel_1d_f_bgr888,
 188       fetch_texel_2d_f_bgr888,
 189       fetch_texel_3d_f_bgr888
 190    },
 191    {
 192       MESA_FORMAT_RGB565,
 193       fetch_texel_1d_f_rgb565,
 194       fetch_texel_2d_f_rgb565,
 195       fetch_texel_3d_f_rgb565
 196    },
 197    {
 198       MESA_FORMAT_RGB565_REV,
 199       fetch_texel_1d_f_rgb565_rev,
 200       fetch_texel_2d_f_rgb565_rev,
 201       fetch_texel_3d_f_rgb565_rev
 202    },
 203    {
 204       MESA_FORMAT_ARGB4444,
 205       fetch_texel_1d_f_argb4444,
 206       fetch_texel_2d_f_argb4444,
 207       fetch_texel_3d_f_argb4444
 208    },
 209    {
 210       MESA_FORMAT_ARGB4444_REV,
 211       fetch_texel_1d_f_argb4444_rev,
 212       fetch_texel_2d_f_argb4444_rev,
 213       fetch_texel_3d_f_argb4444_rev
 214    },
 215    {
 216       MESA_FORMAT_RGBA5551,
 217       fetch_texel_1d_f_rgba5551,
 218       fetch_texel_2d_f_rgba5551,
 219       fetch_texel_3d_f_rgba5551
 220    },
 221    {
 222       MESA_FORMAT_ARGB1555,
 223       fetch_texel_1d_f_argb1555,
 224       fetch_texel_2d_f_argb1555,
 225       fetch_texel_3d_f_argb1555
 226    },
 227    {
 228       MESA_FORMAT_ARGB1555_REV,
 229       fetch_texel_1d_f_argb1555_rev,
 230       fetch_texel_2d_f_argb1555_rev,
 231       fetch_texel_3d_f_argb1555_rev
 232    },
 233    {
 234       MESA_FORMAT_AL44,
 235       fetch_texel_1d_f_al44,
 236       fetch_texel_2d_f_al44,
 237       fetch_texel_3d_f_al44
 238    },
 239    {
 240       MESA_FORMAT_AL88,
 241       fetch_texel_1d_f_al88,
 242       fetch_texel_2d_f_al88,
 243       fetch_texel_3d_f_al88
 244    },
 245    {
 246       MESA_FORMAT_AL88_REV,
 247       fetch_texel_1d_f_al88_rev,
 248       fetch_texel_2d_f_al88_rev,
 249       fetch_texel_3d_f_al88_rev
 250    },
 251    {
 252       MESA_FORMAT_AL1616,
 253       fetch_texel_1d_f_al1616,
 254       fetch_texel_2d_f_al1616,
 255       fetch_texel_3d_f_al1616
 256    },
 257    {
 258       MESA_FORMAT_AL1616_REV,
 259       fetch_texel_1d_f_al1616_rev,
 260       fetch_texel_2d_f_al1616_rev,
 261       fetch_texel_3d_f_al1616_rev
 262    },
 263    {
 264       MESA_FORMAT_RGB332,
 265       fetch_texel_1d_f_rgb332,
 266       fetch_texel_2d_f_rgb332,
 267       fetch_texel_3d_f_rgb332
 268    },
 269    {
 270       MESA_FORMAT_A8,
 271       fetch_texel_1d_f_a8,
 272       fetch_texel_2d_f_a8,
 273       fetch_texel_3d_f_a8
 274    },
 275    {
 276       MESA_FORMAT_A16,
 277       fetch_texel_1d_f_a16,
 278       fetch_texel_2d_f_a16,
 279       fetch_texel_3d_f_a16
 280    },
 281    {
 282       MESA_FORMAT_L8,
 283       fetch_texel_1d_f_l8,
 284       fetch_texel_2d_f_l8,
 285       fetch_texel_3d_f_l8
 286    },
 287    {
 288       MESA_FORMAT_L16,
 289       fetch_texel_1d_f_l16,
 290       fetch_texel_2d_f_l16,
 291       fetch_texel_3d_f_l16
 292    },
 293    {
 294       MESA_FORMAT_I8,
 295       fetch_texel_1d_f_i8,
 296       fetch_texel_2d_f_i8,
 297       fetch_texel_3d_f_i8
 298    },
 299    {
 300       MESA_FORMAT_I16,
 301       fetch_texel_1d_f_i16,
 302       fetch_texel_2d_f_i16,
 303       fetch_texel_3d_f_i16
 304    },
 305    {
 306       MESA_FORMAT_YCBCR,
 307       fetch_texel_1d_f_ycbcr,
 308       fetch_texel_2d_f_ycbcr,
 309       fetch_texel_3d_f_ycbcr
 310    },
 311    {
 312       MESA_FORMAT_YCBCR_REV,
 313       fetch_texel_1d_f_ycbcr_rev,
 314       fetch_texel_2d_f_ycbcr_rev,
 315       fetch_texel_3d_f_ycbcr_rev
 316    },
 317    {
 318       MESA_FORMAT_R8,
 319       fetch_texel_1d_f_r8,
 320       fetch_texel_2d_f_r8,
 321       fetch_texel_3d_f_r8
 322    },
 323    {
 324       MESA_FORMAT_GR88,
 325       fetch_texel_1d_f_gr88,
 326       fetch_texel_2d_f_gr88,
 327       fetch_texel_3d_f_gr88
 328    },
 329    {
 330       MESA_FORMAT_RG88,
 331       fetch_texel_1d_f_rg88,
 332       fetch_texel_2d_f_rg88,
 333       fetch_texel_3d_f_rg88
 334    },
 335    {
 336       MESA_FORMAT_R16,
 337       fetch_texel_1d_f_r16,
 338       fetch_texel_2d_f_r16,
 339       fetch_texel_3d_f_r16
 340    },
 341    {
 342       MESA_FORMAT_RG1616,
 343       fetch_texel_1d_f_rg1616,
 344       fetch_texel_2d_f_rg1616,
 345       fetch_texel_3d_f_rg1616
 346    },
 347    {
 348       MESA_FORMAT_RG1616_REV,
 349       fetch_texel_1d_f_rg1616_rev,
 350       fetch_texel_2d_f_rg1616_rev,
 351       fetch_texel_3d_f_rg1616_rev
 352    },
 353    {
 354       MESA_FORMAT_ARGB2101010,
 355       fetch_texel_1d_f_argb2101010,
 356       fetch_texel_2d_f_argb2101010,
 357       fetch_texel_3d_f_argb2101010
 358    },
 359    {
 360       MESA_FORMAT_Z24_S8,
 361       fetch_texel_1d_f_z24_s8,
 362       fetch_texel_2d_f_z24_s8,
 363       fetch_texel_3d_f_z24_s8
 364    },
 365    {
 366       MESA_FORMAT_S8_Z24,
 367       fetch_texel_1d_f_s8_z24,
 368       fetch_texel_2d_f_s8_z24,
 369       fetch_texel_3d_f_s8_z24
 370    },
 371    {
 372       MESA_FORMAT_Z16,
 373       fetch_texel_1d_f_z16,
 374       fetch_texel_2d_f_z16,
 375       fetch_texel_3d_f_z16
 376    },
 377    {
 378       MESA_FORMAT_X8_Z24,
 379       fetch_texel_1d_f_s8_z24,
 380       fetch_texel_2d_f_s8_z24,
 381       fetch_texel_3d_f_s8_z24
 382    },
 383    {
 384       MESA_FORMAT_Z24_X8,
 385       fetch_texel_1d_f_z24_s8,
 386       fetch_texel_2d_f_z24_s8,
 387       fetch_texel_3d_f_z24_s8
 388    },
 389    {
 390       MESA_FORMAT_Z32,
 391       fetch_texel_1d_f_z32,
 392       fetch_texel_2d_f_z32,
 393       fetch_texel_3d_f_z32
 394    },
 395    {
 396       MESA_FORMAT_S8,
 397       NULL,
 398       NULL,
 399       NULL
 400    },
 401    {
 402       MESA_FORMAT_SRGB8,
 403       fetch_texel_1d_srgb8,
 404       fetch_texel_2d_srgb8,
 405       fetch_texel_3d_srgb8
 406    },
 407    {
 408       MESA_FORMAT_SRGBA8,
 409       fetch_texel_1d_srgba8,
 410       fetch_texel_2d_srgba8,
 411       fetch_texel_3d_srgba8
 412    },
 413    {
 414       MESA_FORMAT_SARGB8,
 415       fetch_texel_1d_sargb8,
 416       fetch_texel_2d_sargb8,
 417       fetch_texel_3d_sargb8
 418    },
 419    {
 420       MESA_FORMAT_SL8,
 421       fetch_texel_1d_sl8,
 422       fetch_texel_2d_sl8,
 423       fetch_texel_3d_sl8
 424    },
 425    {
 426       MESA_FORMAT_SLA8,
 427       fetch_texel_1d_sla8,
 428       fetch_texel_2d_sla8,
 429       fetch_texel_3d_sla8
 430    },
 431    {
 432       MESA_FORMAT_SRGB_DXT1,
 433       NULL,
 434       _mesa_fetch_texel_2d_f_srgb_dxt1,
 435       NULL
 436    },
 437    {
 438       MESA_FORMAT_SRGBA_DXT1,
 439       NULL,
 440       _mesa_fetch_texel_2d_f_srgba_dxt1,
 441       NULL
 442    },
 443    {
 444       MESA_FORMAT_SRGBA_DXT3,
 445       NULL,
 446       _mesa_fetch_texel_2d_f_srgba_dxt3,
 447       NULL
 448    },
 449    {
 450       MESA_FORMAT_SRGBA_DXT5,
 451       NULL,
 452       _mesa_fetch_texel_2d_f_srgba_dxt5,
 453       NULL
 454    },
 455
 456    {
 457       MESA_FORMAT_RGB_FXT1,
 458       NULL,
 459       _mesa_fetch_texel_2d_f_rgb_fxt1,
 460       NULL
 461    },
 462    {
 463       MESA_FORMAT_RGBA_FXT1,
 464       NULL,
 465       _mesa_fetch_texel_2d_f_rgba_fxt1,
 466       NULL
 467    },
 468    {
 469       MESA_FORMAT_RGB_DXT1,
 470       NULL,
 471       _mesa_fetch_texel_2d_f_rgb_dxt1,
 472       NULL
 473    },
 474    {
 475       MESA_FORMAT_RGBA_DXT1,
 476       NULL,
 477       _mesa_fetch_texel_2d_f_rgba_dxt1,
 478       NULL
 479    },
 480    {
 481       MESA_FORMAT_RGBA_DXT3,
 482       NULL,
 483       _mesa_fetch_texel_2d_f_rgba_dxt3,
 484       NULL
 485    },
 486    {
 487       MESA_FORMAT_RGBA_DXT5,
 488       NULL,
 489       _mesa_fetch_texel_2d_f_rgba_dxt5,
 490       NULL
 491    },
 492    {
 493       MESA_FORMAT_RGBA_FLOAT32,
 494       fetch_texel_1d_f_rgba_f32,
 495       fetch_texel_2d_f_rgba_f32,
 496       fetch_texel_3d_f_rgba_f32
 497    },
 498    {
 499       MESA_FORMAT_RGBA_FLOAT16,
 500       fetch_texel_1d_f_rgba_f16,
 501       fetch_texel_2d_f_rgba_f16,
 502       fetch_texel_3d_f_rgba_f16
 503    },
 504    {
 505       MESA_FORMAT_RGB_FLOAT32,
 506       fetch_texel_1d_f_rgb_f32,
 507       fetch_texel_2d_f_rgb_f32,
 508       fetch_texel_3d_f_rgb_f32
 509    },
 510    {
 511       MESA_FORMAT_RGB_FLOAT16,
 512       fetch_texel_1d_f_rgb_f16,
 513       fetch_texel_2d_f_rgb_f16,
 514       fetch_texel_3d_f_rgb_f16
 515    },
 516    {
 517       MESA_FORMAT_ALPHA_FLOAT32,
 518       fetch_texel_1d_f_alpha_f32,
 519       fetch_texel_2d_f_alpha_f32,
 520       fetch_texel_3d_f_alpha_f32
 521    },
 522    {
 523       MESA_FORMAT_ALPHA_FLOAT16,
 524       fetch_texel_1d_f_alpha_f16,
 525       fetch_texel_2d_f_alpha_f16,
 526       fetch_texel_3d_f_alpha_f16
 527    },
 528    {
 529       MESA_FORMAT_LUMINANCE_FLOAT32,
 530       fetch_texel_1d_f_luminance_f32,
 531       fetch_texel_2d_f_luminance_f32,
 532       fetch_texel_3d_f_luminance_f32
 533    },
 534    {
 535       MESA_FORMAT_LUMINANCE_FLOAT16,
 536       fetch_texel_1d_f_luminance_f16,
 537       fetch_texel_2d_f_luminance_f16,
 538       fetch_texel_3d_f_luminance_f16
 539    },
 540    {
 541       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 542       fetch_texel_1d_f_luminance_alpha_f32,
 543       fetch_texel_2d_f_luminance_alpha_f32,
 544       fetch_texel_3d_f_luminance_alpha_f32
 545    },
 546    {
 547       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 548       fetch_texel_1d_f_luminance_alpha_f16,
 549       fetch_texel_2d_f_luminance_alpha_f16,
 550       fetch_texel_3d_f_luminance_alpha_f16
 551    },
 552    {
 553       MESA_FORMAT_INTENSITY_FLOAT32,
 554       fetch_texel_1d_f_intensity_f32,
 555       fetch_texel_2d_f_intensity_f32,
 556       fetch_texel_3d_f_intensity_f32
 557    },
 558    {
 559       MESA_FORMAT_INTENSITY_FLOAT16,
 560       fetch_texel_1d_f_intensity_f16,
 561       fetch_texel_2d_f_intensity_f16,
 562       fetch_texel_3d_f_intensity_f16
 563    },
 564    {
 565       MESA_FORMAT_R_FLOAT32,
 566       fetch_texel_1d_f_r_f32,
 567       fetch_texel_2d_f_r_f32,
 568       fetch_texel_3d_f_r_f32
 569    },
 570    {
 571       MESA_FORMAT_R_FLOAT16,
 572       fetch_texel_1d_f_r_f16,
 573       fetch_texel_2d_f_r_f16,
 574       fetch_texel_3d_f_r_f16
 575    },
 576    {
 577       MESA_FORMAT_RG_FLOAT32,
 578       fetch_texel_1d_f_rg_f32,
 579       fetch_texel_2d_f_rg_f32,
 580       fetch_texel_3d_f_rg_f32
 581    },
 582    {
 583       MESA_FORMAT_RG_FLOAT16,
 584       fetch_texel_1d_f_rg_f16,
 585       fetch_texel_2d_f_rg_f16,
 586       fetch_texel_3d_f_rg_f16
 587    },
 588
 589    {
 590       MESA_FORMAT_ALPHA_UINT8,
 591       NULL,
 592       NULL,
 593       NULL
 594    },
 595
 596    {
 597       MESA_FORMAT_ALPHA_UINT16,
 598       NULL,
 599       NULL,
 600       NULL
 601    },
 602
 603    {
 604       MESA_FORMAT_ALPHA_UINT32,
 605       NULL,
 606       NULL,
 607       NULL
 608    },
 609
 610    {
 611       MESA_FORMAT_ALPHA_INT8,
 612       NULL,
 613       NULL,
 614       NULL
 615    },
 616
 617    {
 618       MESA_FORMAT_ALPHA_INT16,
 619       NULL,
 620       NULL,
 621       NULL
 622    },
 623
 624    {
 625       MESA_FORMAT_ALPHA_INT32,
 626       NULL,
 627       NULL,
 628       NULL
 629    },
 630
 631
 632    {
 633       MESA_FORMAT_INTENSITY_UINT8,
 634       NULL,
 635       NULL,
 636       NULL
 637    },
 638
 639    {
 640       MESA_FORMAT_INTENSITY_UINT16,
 641       NULL,
 642       NULL,
 643       NULL
 644    },
 645
 646    {
 647       MESA_FORMAT_INTENSITY_UINT32,
 648       NULL,
 649       NULL,
 650       NULL
 651    },
 652
 653    {
 654       MESA_FORMAT_INTENSITY_INT8,
 655       NULL,
 656       NULL,
 657       NULL
 658    },
 659
 660    {
 661       MESA_FORMAT_INTENSITY_INT16,
 662       NULL,
 663       NULL,
 664       NULL
 665    },
 666
 667    {
 668       MESA_FORMAT_INTENSITY_INT32,
 669       NULL,
 670       NULL,
 671       NULL
 672    },
 673
 674
 675    {
 676       MESA_FORMAT_LUMINANCE_UINT8,
 677       NULL,
 678       NULL,
 679       NULL
 680    },
 681
 682    {
 683       MESA_FORMAT_LUMINANCE_UINT16,
 684       NULL,
 685       NULL,
 686       NULL
 687    },
 688
 689    {
 690       MESA_FORMAT_LUMINANCE_UINT32,
 691       NULL,
 692       NULL,
 693       NULL
 694    },
 695
 696    {
 697       MESA_FORMAT_LUMINANCE_INT8,
 698       NULL,
 699       NULL,
 700       NULL
 701    },
 702
 703    {
 704       MESA_FORMAT_LUMINANCE_INT16,
 705       NULL,
 706       NULL,
 707       NULL
 708    },
 709
 710    {
 711       MESA_FORMAT_LUMINANCE_INT32,
 712       NULL,
 713       NULL,
 714       NULL
 715    },
 716
 717
 718    {
 719       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 720       NULL,
 721       NULL,
 722       NULL
 723    },
 724
 725    {
 726       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 727       NULL,
 728       NULL,
 729       NULL
 730    },
 731
 732    {
 733       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 734       NULL,
 735       NULL,
 736       NULL
 737    },
 738
 739    {
 740       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 741       NULL,
 742       NULL,
 743       NULL
 744    },
 745
 746    {
 747       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 748       NULL,
 749       NULL,
 750       NULL
 751    },
 752
 753    {
 754       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 755       NULL,
 756       NULL,
 757       NULL
 758    },
 759
 760
 761    {
 762       MESA_FORMAT_R_INT8,
 763       NULL,
 764       NULL,
 765       NULL
 766    },
 767
 768    {
 769       MESA_FORMAT_RG_INT8,
 770       NULL,
 771       NULL,
 772       NULL
 773    },
 774
 775    {
 776       MESA_FORMAT_RGB_INT8,
 777       NULL,
 778       NULL,
 779       NULL
 780    },
 781
 782    /* non-normalized, signed int */
 783    {
 784       MESA_FORMAT_RGBA_INT8,
 785       fetch_texel_1d_rgba_int8,
 786       fetch_texel_2d_rgba_int8,
 787       fetch_texel_3d_rgba_int8
 788    },
 789    {
 790       MESA_FORMAT_R_INT16,
 791       NULL,
 792       NULL,
 793       NULL
 794    },
 795    {
 796       MESA_FORMAT_RG_INT16,
 797       NULL,
 798       NULL,
 799       NULL
 800    },
 801    {
 802       MESA_FORMAT_RGB_INT16,
 803       NULL,
 804       NULL,
 805       NULL
 806    },
 807    {
 808       MESA_FORMAT_RGBA_INT16,
 809       fetch_texel_1d_rgba_int16,
 810       fetch_texel_2d_rgba_int16,
 811       fetch_texel_3d_rgba_int16
 812    },
 813    {
 814       MESA_FORMAT_R_INT32,
 815       NULL,
 816       NULL,
 817       NULL
 818    },
 819    {
 820       MESA_FORMAT_RG_INT32,
 821       NULL,
 822       NULL,
 823       NULL
 824    },
 825    {
 826       MESA_FORMAT_RGB_INT32,
 827       NULL,
 828       NULL,
 829       NULL
 830    },
 831    {
 832       MESA_FORMAT_RGBA_INT32,
 833       fetch_texel_1d_rgba_int32,
 834       fetch_texel_2d_rgba_int32,
 835       fetch_texel_3d_rgba_int32
 836    },
 837
 838    /* non-normalized, unsigned int */
 839    {
 840       MESA_FORMAT_R_UINT8,
 841       NULL,
 842       NULL,
 843       NULL
 844    },
 845    {
 846       MESA_FORMAT_RG_UINT8,
 847       NULL,
 848       NULL,
 849       NULL
 850    },
 851    {
 852       MESA_FORMAT_RGB_UINT8,
 853       NULL,
 854       NULL,
 855       NULL
 856    },
 857    {
 858       MESA_FORMAT_RGBA_UINT8,
 859       fetch_texel_1d_rgba_uint8,
 860       fetch_texel_2d_rgba_uint8,
 861       fetch_texel_3d_rgba_uint8
 862    },
 863    {
 864       MESA_FORMAT_R_UINT16,
 865       NULL,
 866       NULL,
 867       NULL
 868    },
 869    {
 870       MESA_FORMAT_RG_UINT16,
 871       NULL,
 872       NULL,
 873       NULL
 874    },
 875    {
 876       MESA_FORMAT_RGB_UINT16,
 877       NULL,
 878       NULL,
 879       NULL
 880    },
 881    {
 882       MESA_FORMAT_RGBA_UINT16,
 883       fetch_texel_1d_rgba_uint16,
 884       fetch_texel_2d_rgba_uint16,
 885       fetch_texel_3d_rgba_uint16
 886    },
 887    {
 888       MESA_FORMAT_R_UINT32,
 889       NULL,
 890       NULL,
 891       NULL
 892    },
 893    {
 894       MESA_FORMAT_RG_UINT32,
 895       NULL,
 896       NULL,
 897       NULL
 898    },
 899    {
 900       MESA_FORMAT_RGB_UINT32,
 901       NULL,
 902       NULL,
 903       NULL
 904    },
 905    {
 906       MESA_FORMAT_RGBA_UINT32,
 907       fetch_texel_1d_rgba_uint32,
 908       fetch_texel_2d_rgba_uint32,
 909       fetch_texel_3d_rgba_uint32
 910    },
 911
 912    /* dudv */
 913    {
 914       MESA_FORMAT_DUDV8,
 915       fetch_texel_1d_dudv8,
 916       fetch_texel_2d_dudv8,
 917       fetch_texel_3d_dudv8
 918    },
 919
 920    /* signed, normalized */
 921    {
 922       MESA_FORMAT_SIGNED_R8,
 923       fetch_texel_1d_signed_r8,
 924       fetch_texel_2d_signed_r8,
 925       fetch_texel_3d_signed_r8
 926    },
 927    {
 928       MESA_FORMAT_SIGNED_RG88_REV,
 929       fetch_texel_1d_signed_rg88_rev,
 930       fetch_texel_2d_signed_rg88_rev,
 931       fetch_texel_3d_signed_rg88_rev
 932    },
 933    {
 934       MESA_FORMAT_SIGNED_RGBX8888,
 935       fetch_texel_1d_signed_rgbx8888,
 936       fetch_texel_2d_signed_rgbx8888,
 937       fetch_texel_3d_signed_rgbx8888
 938    },
 939    {
 940       MESA_FORMAT_SIGNED_RGBA8888,
 941       fetch_texel_1d_signed_rgba8888,
 942       fetch_texel_2d_signed_rgba8888,
 943       fetch_texel_3d_signed_rgba8888
 944    },
 945    {
 946       MESA_FORMAT_SIGNED_RGBA8888_REV,
 947       fetch_texel_1d_signed_rgba8888_rev,
 948       fetch_texel_2d_signed_rgba8888_rev,
 949       fetch_texel_3d_signed_rgba8888_rev
 950    },
 951    {
 952       MESA_FORMAT_SIGNED_R16,
 953       fetch_texel_1d_signed_r16,
 954       fetch_texel_2d_signed_r16,
 955       fetch_texel_3d_signed_r16
 956    },
 957    {
 958       MESA_FORMAT_SIGNED_GR1616,
 959       fetch_texel_1d_signed_rg1616,
 960       fetch_texel_2d_signed_rg1616,
 961       fetch_texel_3d_signed_rg1616
 962    },
 963    {
 964       MESA_FORMAT_SIGNED_RGB_16,
 965       fetch_texel_1d_signed_rgb_16,
 966       fetch_texel_2d_signed_rgb_16,
 967       fetch_texel_3d_signed_rgb_16
 968    },
 969    {
 970       MESA_FORMAT_SIGNED_RGBA_16,
 971       fetch_texel_1d_signed_rgba_16,
 972       fetch_texel_2d_signed_rgba_16,
 973       fetch_texel_3d_signed_rgba_16
 974    },
 975    {
 976       MESA_FORMAT_RGBA_16,
 977       fetch_texel_1d_rgba_16,
 978       fetch_texel_2d_rgba_16,
 979       fetch_texel_3d_rgba_16
 980    },
 981    {
 982       MESA_FORMAT_RED_RGTC1,
 983       NULL,
 984       _mesa_fetch_texel_2d_f_red_rgtc1,
 985       NULL
 986    },
 987    {
 988       MESA_FORMAT_SIGNED_RED_RGTC1,
 989       NULL,
 990       _mesa_fetch_texel_2d_f_signed_red_rgtc1,
 991       NULL
 992    },
 993    {
 994       MESA_FORMAT_RG_RGTC2,
 995       NULL,
 996       _mesa_fetch_texel_2d_f_rg_rgtc2,
 997       NULL
 998    },
 999    {
1000       MESA_FORMAT_SIGNED_RG_RGTC2,
1001       NULL,
1002       _mesa_fetch_texel_2d_f_signed_rg_rgtc2,
1003       NULL
1004    },
1005    {
1006       MESA_FORMAT_L_LATC1,
1007       NULL,
1008       _mesa_fetch_texel_2d_f_l_latc1,
1009       NULL
1010    },
1011    {
1012       MESA_FORMAT_SIGNED_L_LATC1,
1013       NULL,
1014       _mesa_fetch_texel_2d_f_signed_l_latc1,
1015       NULL
1016    },
1017    {
1018       MESA_FORMAT_LA_LATC2,
1019       NULL,
1020       _mesa_fetch_texel_2d_f_la_latc2,
1021       NULL
1022    },
1023    {
1024       MESA_FORMAT_SIGNED_LA_LATC2,
1025       NULL,
1026       _mesa_fetch_texel_2d_f_signed_la_latc2,
1027       NULL
1028    },
1029    {
1030       MESA_FORMAT_ETC1_RGB8,
1031       NULL,
1032       _mesa_fetch_texel_2d_f_etc1_rgb8,
1033       NULL
1034    },
1035    {
1036       MESA_FORMAT_SIGNED_A8,
1037       fetch_texel_1d_signed_a8,
1038       fetch_texel_2d_signed_a8,
1039       fetch_texel_3d_signed_a8
1040    },
1041    {
1042       MESA_FORMAT_SIGNED_L8,
1043       fetch_texel_1d_signed_l8,
1044       fetch_texel_2d_signed_l8,
1045       fetch_texel_3d_signed_l8
1046    },
1047    {
1048       MESA_FORMAT_SIGNED_AL88,
1049       fetch_texel_1d_signed_al88,
1050       fetch_texel_2d_signed_al88,
1051       fetch_texel_3d_signed_al88
1052    },
1053    {
1054       MESA_FORMAT_SIGNED_I8,
1055       fetch_texel_1d_signed_i8,
1056       fetch_texel_2d_signed_i8,
1057       fetch_texel_3d_signed_i8
1058    },
1059    {
1060       MESA_FORMAT_SIGNED_A16,
1061       fetch_texel_1d_signed_a16,
1062       fetch_texel_2d_signed_a16,
1063       fetch_texel_3d_signed_a16
1064    },
1065    {
1066       MESA_FORMAT_SIGNED_L16,
1067       fetch_texel_1d_signed_l16,
1068       fetch_texel_2d_signed_l16,
1069       fetch_texel_3d_signed_l16
1070    },
1071    {
1072       MESA_FORMAT_SIGNED_AL1616,
1073       fetch_texel_1d_signed_al1616,
1074       fetch_texel_2d_signed_al1616,
1075       fetch_texel_3d_signed_al1616
1076    },
1077    {
1078       MESA_FORMAT_SIGNED_I16,
1079       fetch_texel_1d_signed_i16,
1080       fetch_texel_2d_signed_i16,
1081       fetch_texel_3d_signed_i16
1082    },
1083    {
1084       MESA_FORMAT_RGB9_E5_FLOAT,
1085       fetch_texel_1d_rgb9_e5,
1086       fetch_texel_2d_rgb9_e5,
1087       fetch_texel_3d_rgb9_e5
1088    },
1089    {
1090       MESA_FORMAT_R11_G11_B10_FLOAT,
1091       fetch_texel_1d_r11_g11_b10f,
1092       fetch_texel_2d_r11_g11_b10f,
1093       fetch_texel_3d_r11_g11_b10f
1094    },
1095    {
1096       MESA_FORMAT_Z32_FLOAT,
1097       fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
1098       fetch_texel_2d_f_r_f32,
1099       fetch_texel_3d_f_r_f32
1100    },
1101    {
1102       MESA_FORMAT_Z32_FLOAT_X24S8,
1103       fetch_texel_1d_z32f_x24s8,
1104       fetch_texel_2d_z32f_x24s8,
1105       fetch_texel_3d_z32f_x24s8
1106    },
1107    {
1108       MESA_FORMAT_ARGB2101010_UINT,
1109       NULL,
1110       NULL,
1111       NULL
1112    }
1113 };
1114
1115
1116 FetchTexelFunc
1117 _mesa_get_texel_fetch_func(gl_format format, GLuint dims)
1118 {
1119 #ifdef DEBUG
1120    /* check that the table entries are sorted by format name */
1121    gl_format fmt;
1122    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
1123       assert(texfetch_funcs[fmt].Name == fmt);
1124    }
1125 #endif
1126
1127    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
1128
1129    assert(format < MESA_FORMAT_COUNT);
1130
1131    switch (dims) {
1132    case 1:
1133       return texfetch_funcs[format].Fetch1D;
1134    case 2:
1135       return texfetch_funcs[format].Fetch2D;
1136    case 3:
1137       return texfetch_funcs[format].Fetch3D;
1138    default:
1139       assert(0 && "bad dims in _mesa_get_texel_fetch_func");
1140       return NULL;
1141    }
1142 }
1143
1144
1145 /**
1146  * Initialize the texture image's FetchTexel methods.
1147  */
1148 static void
1149 set_fetch_functions(struct swrast_texture_image *texImage, GLuint dims)
1150 {
1151    gl_format format = texImage->Base.TexFormat;
1152
1153    ASSERT(dims == 1 || dims == 2 || dims == 3);
1154
1155    if (texImage->Base.TexObject->Sampler.sRGBDecode == GL_SKIP_DECODE_EXT &&
1156        _mesa_get_format_color_encoding(format) == GL_SRGB) {
1157       format = _mesa_get_srgb_format_linear(format);
1158    }
1159
1160    texImage->FetchTexel = _mesa_get_texel_fetch_func(format, dims);
1161    ASSERT(texImage->FetchTexel);
1162 }
1163
1164 void
1165 _mesa_update_fetch_functions(struct gl_texture_object *texObj)
1166 {
1167    GLuint face, i;
1168    GLuint dims;
1169
1170    dims = _mesa_get_texture_dimensions(texObj->Target);
1171
1172    for (face = 0; face < 6; face++) {
1173       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
1174          if (texObj->Image[face][i]) {
1175             set_fetch_functions(swrast_texture_image(texObj->Image[face][i]),
1176                                 dims);
1177          }
1178       }
1179    }
1180 }