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 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
  47 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
  48
  49
  50 /**
  51  * Convert an 8-bit sRGB value from non-linear space to a
  52  * linear RGB value in [0, 1].
  53  * Implemented with a 256-entry lookup table.
  54  */
  55 static inline GLfloat
  56 nonlinear_to_linear(GLubyte cs8)
  57 {
  58    static GLfloat table[256];
  59    static GLboolean tableReady = GL_FALSE;
  60    if (!tableReady) {
  61       /* compute lookup table now */
  62       GLuint i;
  63       for (i = 0; i < 256; i++) {
  64          const GLfloat cs = UBYTE_TO_FLOAT(i);
  65          if (cs <= 0.04045) {
  66             table[i] = cs / 12.92f;
  67          }
  68          else {
  69             table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
  70          }
  71       }
  72       tableReady = GL_TRUE;
  73    }
  74    return table[cs8];
  75 }
  76
  77
  78
  79 /* Texel fetch routines for all supported formats
  80  */
  81 #define DIM 1
  82 #include "s_texfetch_tmp.h"
  83
  84 #define DIM 2
  85 #include "s_texfetch_tmp.h"
  86
  87 #define DIM 3
  88 #include "s_texfetch_tmp.h"
  89
  90 /**
  91  * Null texel fetch function.
  92  *
  93  * Have to have this so the FetchTexel function pointer is never NULL.
  94  */
  95 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
  96                                GLint i, GLint j, GLint k, GLfloat *texel )
  97 {
  98    (void) texImage; (void) i; (void) j; (void) k;
  99    texel[RCOMP] = 0.0;
 100    texel[GCOMP] = 0.0;
 101    texel[BCOMP] = 0.0;
 102    texel[ACOMP] = 0.0;
 103    _mesa_warning(NULL, "fetch_null_texelf() called!");
 104 }
 105
 106 static void store_null_texel(struct swrast_texture_image *texImage,
 107                              GLint i, GLint j, GLint k, const void *texel)
 108 {
 109    (void) texImage;
 110    (void) i;
 111    (void) j;
 112    (void) k;
 113    (void) texel;
 114    /* no-op */
 115 }
 116
 117
 118
 119 /**
 120  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 121  * XXX this is somewhat temporary.
 122  */
 123 static struct {
 124    gl_format Name;
 125    FetchTexelFunc Fetch1D;
 126    FetchTexelFunc Fetch2D;
 127    FetchTexelFunc Fetch3D;
 128    StoreTexelFunc StoreTexel;
 129 }
 130 texfetch_funcs[MESA_FORMAT_COUNT] =
 131 {
 132    {
 133       MESA_FORMAT_NONE,
 134       fetch_null_texelf,
 135       fetch_null_texelf,
 136       fetch_null_texelf,
 137       store_null_texel
 138    },
 139
 140    {
 141       MESA_FORMAT_RGBA8888,
 142       fetch_texel_1d_f_rgba8888,
 143       fetch_texel_2d_f_rgba8888,
 144       fetch_texel_3d_f_rgba8888,
 145       store_texel_rgba8888
 146    },
 147    {
 148       MESA_FORMAT_RGBA8888_REV,
 149       fetch_texel_1d_f_rgba8888_rev,
 150       fetch_texel_2d_f_rgba8888_rev,
 151       fetch_texel_3d_f_rgba8888_rev,
 152       store_texel_rgba8888_rev
 153    },
 154    {
 155       MESA_FORMAT_ARGB8888,
 156       fetch_texel_1d_f_argb8888,
 157       fetch_texel_2d_f_argb8888,
 158       fetch_texel_3d_f_argb8888,
 159       store_texel_argb8888
 160    },
 161    {
 162       MESA_FORMAT_ARGB8888_REV,
 163       fetch_texel_1d_f_argb8888_rev,
 164       fetch_texel_2d_f_argb8888_rev,
 165       fetch_texel_3d_f_argb8888_rev,
 166       store_texel_argb8888_rev
 167    },
 168    {
 169       MESA_FORMAT_RGBX8888,
 170       fetch_texel_1d_f_rgbx8888,
 171       fetch_texel_2d_f_rgbx8888,
 172       fetch_texel_3d_f_rgbx8888,
 173       store_texel_rgbx8888
 174    },
 175    {
 176       MESA_FORMAT_RGBX8888_REV,
 177       fetch_texel_1d_f_rgbx8888_rev,
 178       fetch_texel_2d_f_rgbx8888_rev,
 179       fetch_texel_3d_f_rgbx8888_rev,
 180       store_texel_rgbx8888_rev,
 181    },
 182    {
 183       MESA_FORMAT_XRGB8888,
 184       fetch_texel_1d_f_xrgb8888,
 185       fetch_texel_2d_f_xrgb8888,
 186       fetch_texel_3d_f_xrgb8888,
 187       store_texel_xrgb8888
 188    },
 189    {
 190       MESA_FORMAT_XRGB8888_REV,
 191       fetch_texel_1d_f_xrgb8888_rev,
 192       fetch_texel_2d_f_xrgb8888_rev,
 193       fetch_texel_3d_f_xrgb8888_rev,
 194       store_texel_xrgb8888_rev,
 195    },
 196    {
 197       MESA_FORMAT_RGB888,
 198       fetch_texel_1d_f_rgb888,
 199       fetch_texel_2d_f_rgb888,
 200       fetch_texel_3d_f_rgb888,
 201       store_texel_rgb888
 202    },
 203    {
 204       MESA_FORMAT_BGR888,
 205       fetch_texel_1d_f_bgr888,
 206       fetch_texel_2d_f_bgr888,
 207       fetch_texel_3d_f_bgr888,
 208       store_texel_bgr888
 209    },
 210    {
 211       MESA_FORMAT_RGB565,
 212       fetch_texel_1d_f_rgb565,
 213       fetch_texel_2d_f_rgb565,
 214       fetch_texel_3d_f_rgb565,
 215       store_texel_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       store_texel_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       store_texel_argb4444
 230    },
 231    {
 232       MESA_FORMAT_ARGB4444_REV,
 233       fetch_texel_1d_f_argb4444_rev,
 234       fetch_texel_2d_f_argb4444_rev,
 235       fetch_texel_3d_f_argb4444_rev,
 236       store_texel_argb4444_rev
 237    },
 238    {
 239       MESA_FORMAT_RGBA5551,
 240       fetch_texel_1d_f_rgba5551,
 241       fetch_texel_2d_f_rgba5551,
 242       fetch_texel_3d_f_rgba5551,
 243       store_texel_rgba5551
 244    },
 245    {
 246       MESA_FORMAT_ARGB1555,
 247       fetch_texel_1d_f_argb1555,
 248       fetch_texel_2d_f_argb1555,
 249       fetch_texel_3d_f_argb1555,
 250       store_texel_argb1555
 251    },
 252    {
 253       MESA_FORMAT_ARGB1555_REV,
 254       fetch_texel_1d_f_argb1555_rev,
 255       fetch_texel_2d_f_argb1555_rev,
 256       fetch_texel_3d_f_argb1555_rev,
 257       store_texel_argb1555_rev
 258    },
 259    {
 260       MESA_FORMAT_AL44,
 261       fetch_texel_1d_f_al44,
 262       fetch_texel_2d_f_al44,
 263       fetch_texel_3d_f_al44,
 264       store_texel_al44
 265    },
 266    {
 267       MESA_FORMAT_AL88,
 268       fetch_texel_1d_f_al88,
 269       fetch_texel_2d_f_al88,
 270       fetch_texel_3d_f_al88,
 271       store_texel_al88
 272    },
 273    {
 274       MESA_FORMAT_AL88_REV,
 275       fetch_texel_1d_f_al88_rev,
 276       fetch_texel_2d_f_al88_rev,
 277       fetch_texel_3d_f_al88_rev,
 278       store_texel_al88_rev
 279    },
 280    {
 281       MESA_FORMAT_AL1616,
 282       fetch_texel_1d_f_al1616,
 283       fetch_texel_2d_f_al1616,
 284       fetch_texel_3d_f_al1616,
 285       store_texel_al1616
 286    },
 287    {
 288       MESA_FORMAT_AL1616_REV,
 289       fetch_texel_1d_f_al1616_rev,
 290       fetch_texel_2d_f_al1616_rev,
 291       fetch_texel_3d_f_al1616_rev,
 292       store_texel_al1616_rev
 293    },
 294    {
 295       MESA_FORMAT_RGB332,
 296       fetch_texel_1d_f_rgb332,
 297       fetch_texel_2d_f_rgb332,
 298       fetch_texel_3d_f_rgb332,
 299       store_texel_rgb332
 300    },
 301    {
 302       MESA_FORMAT_A8,
 303       fetch_texel_1d_f_a8,
 304       fetch_texel_2d_f_a8,
 305       fetch_texel_3d_f_a8,
 306       store_texel_a8
 307    },
 308    {
 309       MESA_FORMAT_A16,
 310       fetch_texel_1d_f_a16,
 311       fetch_texel_2d_f_a16,
 312       fetch_texel_3d_f_a16,
 313       store_texel_a16
 314    },
 315    {
 316       MESA_FORMAT_L8,
 317       fetch_texel_1d_f_l8,
 318       fetch_texel_2d_f_l8,
 319       fetch_texel_3d_f_l8,
 320       store_texel_l8
 321    },
 322    {
 323       MESA_FORMAT_L16,
 324       fetch_texel_1d_f_l16,
 325       fetch_texel_2d_f_l16,
 326       fetch_texel_3d_f_l16,
 327       store_texel_l16
 328    },
 329    {
 330       MESA_FORMAT_I8,
 331       fetch_texel_1d_f_i8,
 332       fetch_texel_2d_f_i8,
 333       fetch_texel_3d_f_i8,
 334       store_texel_i8
 335    },
 336    {
 337       MESA_FORMAT_I16,
 338       fetch_texel_1d_f_i16,
 339       fetch_texel_2d_f_i16,
 340       fetch_texel_3d_f_i16,
 341       store_texel_i16
 342    },
 343    {
 344       MESA_FORMAT_YCBCR,
 345       fetch_texel_1d_f_ycbcr,
 346       fetch_texel_2d_f_ycbcr,
 347       fetch_texel_3d_f_ycbcr,
 348       store_texel_ycbcr
 349    },
 350    {
 351       MESA_FORMAT_YCBCR_REV,
 352       fetch_texel_1d_f_ycbcr_rev,
 353       fetch_texel_2d_f_ycbcr_rev,
 354       fetch_texel_3d_f_ycbcr_rev,
 355       store_texel_ycbcr_rev
 356    },
 357    {
 358       MESA_FORMAT_R8,
 359       fetch_texel_1d_f_r8,
 360       fetch_texel_2d_f_r8,
 361       fetch_texel_3d_f_r8,
 362       store_texel_r8,
 363    },
 364    {
 365       MESA_FORMAT_GR88,
 366       fetch_texel_1d_f_gr88,
 367       fetch_texel_2d_f_gr88,
 368       fetch_texel_3d_f_gr88,
 369       store_texel_gr88,
 370    },
 371    {
 372       MESA_FORMAT_RG88,
 373       fetch_texel_1d_f_rg88,
 374       fetch_texel_2d_f_rg88,
 375       fetch_texel_3d_f_rg88,
 376       store_texel_rg88,
 377    },
 378    {
 379       MESA_FORMAT_R16,
 380       fetch_texel_1d_f_r16,
 381       fetch_texel_2d_f_r16,
 382       fetch_texel_3d_f_r16,
 383       store_texel_r16,
 384    },
 385    {
 386       MESA_FORMAT_RG1616,
 387       fetch_texel_1d_f_rg1616,
 388       fetch_texel_2d_f_rg1616,
 389       fetch_texel_3d_f_rg1616,
 390       store_texel_rg1616,
 391    },
 392    {
 393       MESA_FORMAT_RG1616_REV,
 394       fetch_texel_1d_f_rg1616_rev,
 395       fetch_texel_2d_f_rg1616_rev,
 396       fetch_texel_3d_f_rg1616_rev,
 397       store_texel_rg1616_rev,
 398    },
 399    {
 400       MESA_FORMAT_ARGB2101010,
 401       fetch_texel_1d_f_argb2101010,
 402       fetch_texel_2d_f_argb2101010,
 403       fetch_texel_3d_f_argb2101010,
 404       store_texel_argb2101010
 405    },
 406    {
 407       MESA_FORMAT_Z24_S8,
 408       fetch_texel_1d_f_z24_s8,
 409       fetch_texel_2d_f_z24_s8,
 410       fetch_texel_3d_f_z24_s8,
 411       store_texel_z24_s8
 412    },
 413    {
 414       MESA_FORMAT_S8_Z24,
 415       fetch_texel_1d_f_s8_z24,
 416       fetch_texel_2d_f_s8_z24,
 417       fetch_texel_3d_f_s8_z24,
 418       store_texel_s8_z24
 419    },
 420    {
 421       MESA_FORMAT_Z16,
 422       fetch_texel_1d_f_z16,
 423       fetch_texel_2d_f_z16,
 424       fetch_texel_3d_f_z16,
 425       store_texel_z16
 426    },
 427    {
 428       MESA_FORMAT_X8_Z24,
 429       fetch_texel_1d_f_s8_z24,
 430       fetch_texel_2d_f_s8_z24,
 431       fetch_texel_3d_f_s8_z24,
 432       store_texel_s8_z24
 433    },
 434    {
 435       MESA_FORMAT_Z24_X8,
 436       fetch_texel_1d_f_z24_s8,
 437       fetch_texel_2d_f_z24_s8,
 438       fetch_texel_3d_f_z24_s8,
 439       store_texel_z24_s8
 440    },
 441    {
 442       MESA_FORMAT_Z32,
 443       fetch_texel_1d_f_z32,
 444       fetch_texel_2d_f_z32,
 445       fetch_texel_3d_f_z32,
 446       store_texel_z32
 447    },
 448    {
 449       MESA_FORMAT_S8,
 450       NULL,
 451       NULL,
 452       NULL,
 453       NULL
 454    },
 455    {
 456       MESA_FORMAT_SRGB8,
 457       fetch_texel_1d_srgb8,
 458       fetch_texel_2d_srgb8,
 459       fetch_texel_3d_srgb8,
 460       store_texel_srgb8
 461    },
 462    {
 463       MESA_FORMAT_SRGBA8,
 464       fetch_texel_1d_srgba8,
 465       fetch_texel_2d_srgba8,
 466       fetch_texel_3d_srgba8,
 467       store_texel_srgba8
 468    },
 469    {
 470       MESA_FORMAT_SARGB8,
 471       fetch_texel_1d_sargb8,
 472       fetch_texel_2d_sargb8,
 473       fetch_texel_3d_sargb8,
 474       store_texel_sargb8
 475    },
 476    {
 477       MESA_FORMAT_SL8,
 478       fetch_texel_1d_sl8,
 479       fetch_texel_2d_sl8,
 480       fetch_texel_3d_sl8,
 481       store_texel_sl8
 482    },
 483    {
 484       MESA_FORMAT_SLA8,
 485       fetch_texel_1d_sla8,
 486       fetch_texel_2d_sla8,
 487       fetch_texel_3d_sla8,
 488       store_texel_sla8
 489    },
 490    {
 491       MESA_FORMAT_SRGB_DXT1,
 492       NULL,
 493       _mesa_fetch_texel_2d_f_srgb_dxt1,
 494       NULL,
 495       NULL
 496    },
 497    {
 498       MESA_FORMAT_SRGBA_DXT1,
 499       NULL,
 500       _mesa_fetch_texel_2d_f_srgba_dxt1,
 501       NULL,
 502       NULL
 503    },
 504    {
 505       MESA_FORMAT_SRGBA_DXT3,
 506       NULL,
 507       _mesa_fetch_texel_2d_f_srgba_dxt3,
 508       NULL,
 509       NULL
 510    },
 511    {
 512       MESA_FORMAT_SRGBA_DXT5,
 513       NULL,
 514       _mesa_fetch_texel_2d_f_srgba_dxt5,
 515       NULL,
 516       NULL
 517    },
 518
 519    {
 520       MESA_FORMAT_RGB_FXT1,
 521       NULL,
 522       _mesa_fetch_texel_2d_f_rgb_fxt1,
 523       NULL,
 524       NULL
 525    },
 526    {
 527       MESA_FORMAT_RGBA_FXT1,
 528       NULL,
 529       _mesa_fetch_texel_2d_f_rgba_fxt1,
 530       NULL,
 531       NULL
 532    },
 533    {
 534       MESA_FORMAT_RGB_DXT1,
 535       NULL,
 536       _mesa_fetch_texel_2d_f_rgb_dxt1,
 537       NULL,
 538       NULL
 539    },
 540    {
 541       MESA_FORMAT_RGBA_DXT1,
 542       NULL,
 543       _mesa_fetch_texel_2d_f_rgba_dxt1,
 544       NULL,
 545       NULL
 546    },
 547    {
 548       MESA_FORMAT_RGBA_DXT3,
 549       NULL,
 550       _mesa_fetch_texel_2d_f_rgba_dxt3,
 551       NULL,
 552       NULL
 553    },
 554    {
 555       MESA_FORMAT_RGBA_DXT5,
 556       NULL,
 557       _mesa_fetch_texel_2d_f_rgba_dxt5,
 558       NULL,
 559       NULL
 560    },
 561    {
 562       MESA_FORMAT_RGBA_FLOAT32,
 563       fetch_texel_1d_f_rgba_f32,
 564       fetch_texel_2d_f_rgba_f32,
 565       fetch_texel_3d_f_rgba_f32,
 566       store_texel_rgba_f32
 567    },
 568    {
 569       MESA_FORMAT_RGBA_FLOAT16,
 570       fetch_texel_1d_f_rgba_f16,
 571       fetch_texel_2d_f_rgba_f16,
 572       fetch_texel_3d_f_rgba_f16,
 573       store_texel_rgba_f16
 574    },
 575    {
 576       MESA_FORMAT_RGB_FLOAT32,
 577       fetch_texel_1d_f_rgb_f32,
 578       fetch_texel_2d_f_rgb_f32,
 579       fetch_texel_3d_f_rgb_f32,
 580       store_texel_rgb_f32
 581    },
 582    {
 583       MESA_FORMAT_RGB_FLOAT16,
 584       fetch_texel_1d_f_rgb_f16,
 585       fetch_texel_2d_f_rgb_f16,
 586       fetch_texel_3d_f_rgb_f16,
 587       store_texel_rgb_f16
 588    },
 589    {
 590       MESA_FORMAT_ALPHA_FLOAT32,
 591       fetch_texel_1d_f_alpha_f32,
 592       fetch_texel_2d_f_alpha_f32,
 593       fetch_texel_3d_f_alpha_f32,
 594       store_texel_alpha_f32
 595    },
 596    {
 597       MESA_FORMAT_ALPHA_FLOAT16,
 598       fetch_texel_1d_f_alpha_f16,
 599       fetch_texel_2d_f_alpha_f16,
 600       fetch_texel_3d_f_alpha_f16,
 601       store_texel_alpha_f16
 602    },
 603    {
 604       MESA_FORMAT_LUMINANCE_FLOAT32,
 605       fetch_texel_1d_f_luminance_f32,
 606       fetch_texel_2d_f_luminance_f32,
 607       fetch_texel_3d_f_luminance_f32,
 608       store_texel_luminance_f32
 609    },
 610    {
 611       MESA_FORMAT_LUMINANCE_FLOAT16,
 612       fetch_texel_1d_f_luminance_f16,
 613       fetch_texel_2d_f_luminance_f16,
 614       fetch_texel_3d_f_luminance_f16,
 615       store_texel_luminance_f16
 616    },
 617    {
 618       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 619       fetch_texel_1d_f_luminance_alpha_f32,
 620       fetch_texel_2d_f_luminance_alpha_f32,
 621       fetch_texel_3d_f_luminance_alpha_f32,
 622       store_texel_luminance_alpha_f32
 623    },
 624    {
 625       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 626       fetch_texel_1d_f_luminance_alpha_f16,
 627       fetch_texel_2d_f_luminance_alpha_f16,
 628       fetch_texel_3d_f_luminance_alpha_f16,
 629       store_texel_luminance_alpha_f16
 630    },
 631    {
 632       MESA_FORMAT_INTENSITY_FLOAT32,
 633       fetch_texel_1d_f_intensity_f32,
 634       fetch_texel_2d_f_intensity_f32,
 635       fetch_texel_3d_f_intensity_f32,
 636       store_texel_intensity_f32
 637    },
 638    {
 639       MESA_FORMAT_INTENSITY_FLOAT16,
 640       fetch_texel_1d_f_intensity_f16,
 641       fetch_texel_2d_f_intensity_f16,
 642       fetch_texel_3d_f_intensity_f16,
 643       store_texel_intensity_f16
 644    },
 645    {
 646       MESA_FORMAT_R_FLOAT32,
 647       fetch_texel_1d_f_r_f32,
 648       fetch_texel_2d_f_r_f32,
 649       fetch_texel_3d_f_r_f32,
 650       store_texel_r_f32
 651    },
 652    {
 653       MESA_FORMAT_R_FLOAT16,
 654       fetch_texel_1d_f_r_f16,
 655       fetch_texel_2d_f_r_f16,
 656       fetch_texel_3d_f_r_f16,
 657       store_texel_r_f16
 658    },
 659    {
 660       MESA_FORMAT_RG_FLOAT32,
 661       fetch_texel_1d_f_rg_f32,
 662       fetch_texel_2d_f_rg_f32,
 663       fetch_texel_3d_f_rg_f32,
 664       store_texel_rg_f32
 665    },
 666    {
 667       MESA_FORMAT_RG_FLOAT16,
 668       fetch_texel_1d_f_rg_f16,
 669       fetch_texel_2d_f_rg_f16,
 670       fetch_texel_3d_f_rg_f16,
 671       store_texel_rg_f16
 672    },
 673
 674    {
 675       MESA_FORMAT_ALPHA_UINT8,
 676       NULL,
 677       NULL,
 678       NULL,
 679       NULL
 680    },
 681
 682    {
 683       MESA_FORMAT_ALPHA_UINT16,
 684       NULL,
 685       NULL,
 686       NULL,
 687       NULL
 688    },
 689
 690    {
 691       MESA_FORMAT_ALPHA_UINT32,
 692       NULL,
 693       NULL,
 694       NULL,
 695       NULL
 696    },
 697
 698    {
 699       MESA_FORMAT_ALPHA_INT8,
 700       NULL,
 701       NULL,
 702       NULL,
 703       NULL
 704    },
 705
 706    {
 707       MESA_FORMAT_ALPHA_INT16,
 708       NULL,
 709       NULL,
 710       NULL,
 711       NULL
 712    },
 713
 714    {
 715       MESA_FORMAT_ALPHA_INT32,
 716       NULL,
 717       NULL,
 718       NULL,
 719       NULL
 720    },
 721
 722
 723    {
 724       MESA_FORMAT_INTENSITY_UINT8,
 725       NULL,
 726       NULL,
 727       NULL,
 728       NULL
 729    },
 730
 731    {
 732       MESA_FORMAT_INTENSITY_UINT16,
 733       NULL,
 734       NULL,
 735       NULL,
 736       NULL
 737    },
 738
 739    {
 740       MESA_FORMAT_INTENSITY_UINT32,
 741       NULL,
 742       NULL,
 743       NULL,
 744       NULL
 745    },
 746
 747    {
 748       MESA_FORMAT_INTENSITY_INT8,
 749       NULL,
 750       NULL,
 751       NULL,
 752       NULL
 753    },
 754
 755    {
 756       MESA_FORMAT_INTENSITY_INT16,
 757       NULL,
 758       NULL,
 759       NULL,
 760       NULL
 761    },
 762
 763    {
 764       MESA_FORMAT_INTENSITY_INT32,
 765       NULL,
 766       NULL,
 767       NULL,
 768       NULL
 769    },
 770
 771
 772    {
 773       MESA_FORMAT_LUMINANCE_UINT8,
 774       NULL,
 775       NULL,
 776       NULL,
 777       NULL
 778    },
 779
 780    {
 781       MESA_FORMAT_LUMINANCE_UINT16,
 782       NULL,
 783       NULL,
 784       NULL,
 785       NULL
 786    },
 787
 788    {
 789       MESA_FORMAT_LUMINANCE_UINT32,
 790       NULL,
 791       NULL,
 792       NULL,
 793       NULL
 794    },
 795
 796    {
 797       MESA_FORMAT_LUMINANCE_INT8,
 798       NULL,
 799       NULL,
 800       NULL,
 801       NULL
 802    },
 803
 804    {
 805       MESA_FORMAT_LUMINANCE_INT16,
 806       NULL,
 807       NULL,
 808       NULL,
 809       NULL
 810    },
 811
 812    {
 813       MESA_FORMAT_LUMINANCE_INT32,
 814       NULL,
 815       NULL,
 816       NULL,
 817       NULL
 818    },
 819
 820
 821    {
 822       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 823       NULL,
 824       NULL,
 825       NULL,
 826       NULL
 827    },
 828
 829    {
 830       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 831       NULL,
 832       NULL,
 833       NULL,
 834       NULL
 835    },
 836
 837    {
 838       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 839       NULL,
 840       NULL,
 841       NULL,
 842       NULL
 843    },
 844
 845    {
 846       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 847       NULL,
 848       NULL,
 849       NULL,
 850       NULL
 851    },
 852
 853    {
 854       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 855       NULL,
 856       NULL,
 857       NULL,
 858       NULL
 859    },
 860
 861    {
 862       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 863       NULL,
 864       NULL,
 865       NULL,
 866       NULL
 867    },
 868
 869
 870    {
 871       MESA_FORMAT_R_INT8,
 872       NULL,
 873       NULL,
 874       NULL,
 875       NULL
 876    },
 877
 878    {
 879       MESA_FORMAT_RG_INT8,
 880       NULL,
 881       NULL,
 882       NULL,
 883       NULL
 884    },
 885
 886    {
 887       MESA_FORMAT_RGB_INT8,
 888       NULL,
 889       NULL,
 890       NULL,
 891       NULL
 892    },
 893
 894    /* non-normalized, signed int */
 895    {
 896       MESA_FORMAT_RGBA_INT8,
 897       fetch_texel_1d_rgba_int8,
 898       fetch_texel_2d_rgba_int8,
 899       fetch_texel_3d_rgba_int8,
 900       store_texel_rgba_int8
 901    },
 902    {
 903       MESA_FORMAT_R_INT16,
 904       NULL,
 905       NULL,
 906       NULL,
 907       NULL
 908    },
 909    {
 910       MESA_FORMAT_RG_INT16,
 911       NULL,
 912       NULL,
 913       NULL,
 914       NULL
 915    },
 916    {
 917       MESA_FORMAT_RGB_INT16,
 918       NULL,
 919       NULL,
 920       NULL,
 921       NULL
 922    },
 923    {
 924       MESA_FORMAT_RGBA_INT16,
 925       fetch_texel_1d_rgba_int16,
 926       fetch_texel_2d_rgba_int16,
 927       fetch_texel_3d_rgba_int16,
 928       store_texel_rgba_int16
 929    },
 930    {
 931       MESA_FORMAT_R_INT32,
 932       NULL,
 933       NULL,
 934       NULL,
 935       NULL
 936    },
 937    {
 938       MESA_FORMAT_RG_INT32,
 939       NULL,
 940       NULL,
 941       NULL,
 942       NULL
 943    },
 944    {
 945       MESA_FORMAT_RGB_INT32,
 946       NULL,
 947       NULL,
 948       NULL,
 949       NULL
 950    },
 951    {
 952       MESA_FORMAT_RGBA_INT32,
 953       fetch_texel_1d_rgba_int32,
 954       fetch_texel_2d_rgba_int32,
 955       fetch_texel_3d_rgba_int32,
 956       store_texel_rgba_int32
 957    },
 958
 959    /* non-normalized, unsigned int */
 960    {
 961       MESA_FORMAT_R_UINT8,
 962       NULL,
 963       NULL,
 964       NULL,
 965       NULL
 966    },
 967    {
 968       MESA_FORMAT_RG_UINT8,
 969       NULL,
 970       NULL,
 971       NULL,
 972       NULL
 973    },
 974    {
 975       MESA_FORMAT_RGB_UINT8,
 976       NULL,
 977       NULL,
 978       NULL,
 979       NULL
 980    },
 981    {
 982       MESA_FORMAT_RGBA_UINT8,
 983       fetch_texel_1d_rgba_uint8,
 984       fetch_texel_2d_rgba_uint8,
 985       fetch_texel_3d_rgba_uint8,
 986       store_texel_rgba_uint8
 987    },
 988    {
 989       MESA_FORMAT_R_UINT16,
 990       NULL,
 991       NULL,
 992       NULL,
 993       NULL
 994    },
 995    {
 996       MESA_FORMAT_RG_UINT16,
 997       NULL,
 998       NULL,
 999       NULL,
1000       NULL
1001    },
1002    {
1003       MESA_FORMAT_RGB_UINT16,
1004       NULL,
1005       NULL,
1006       NULL,
1007       NULL
1008    },
1009    {
1010       MESA_FORMAT_RGBA_UINT16,
1011       fetch_texel_1d_rgba_uint16,
1012       fetch_texel_2d_rgba_uint16,
1013       fetch_texel_3d_rgba_uint16,
1014       store_texel_rgba_uint16
1015    },
1016    {
1017       MESA_FORMAT_R_UINT32,
1018       NULL,
1019       NULL,
1020       NULL,
1021       NULL
1022    },
1023    {
1024       MESA_FORMAT_RG_UINT32,
1025       NULL,
1026       NULL,
1027       NULL,
1028       NULL
1029    },
1030    {
1031       MESA_FORMAT_RGB_UINT32,
1032       NULL,
1033       NULL,
1034       NULL,
1035       NULL
1036    },
1037    {
1038       MESA_FORMAT_RGBA_UINT32,
1039       fetch_texel_1d_rgba_uint32,
1040       fetch_texel_2d_rgba_uint32,
1041       fetch_texel_3d_rgba_uint32,
1042       store_texel_rgba_uint32
1043    },
1044
1045    /* dudv */
1046    {
1047       MESA_FORMAT_DUDV8,
1048       fetch_texel_1d_dudv8,
1049       fetch_texel_2d_dudv8,
1050       fetch_texel_3d_dudv8,
1051       NULL
1052    },
1053
1054    /* signed, normalized */
1055    {
1056       MESA_FORMAT_SIGNED_R8,
1057       fetch_texel_1d_signed_r8,
1058       fetch_texel_2d_signed_r8,
1059       fetch_texel_3d_signed_r8,
1060       store_texel_signed_r8
1061    },
1062    {
1063       MESA_FORMAT_SIGNED_RG88_REV,
1064       fetch_texel_1d_signed_rg88_rev,
1065       fetch_texel_2d_signed_rg88_rev,
1066       fetch_texel_3d_signed_rg88_rev,
1067       store_texel_signed_rg88_rev
1068    },
1069    {
1070       MESA_FORMAT_SIGNED_RGBX8888,
1071       fetch_texel_1d_signed_rgbx8888,
1072       fetch_texel_2d_signed_rgbx8888,
1073       fetch_texel_3d_signed_rgbx8888,
1074       store_texel_signed_rgbx8888
1075    },
1076    {
1077       MESA_FORMAT_SIGNED_RGBA8888,
1078       fetch_texel_1d_signed_rgba8888,
1079       fetch_texel_2d_signed_rgba8888,
1080       fetch_texel_3d_signed_rgba8888,
1081       store_texel_signed_rgba8888
1082    },
1083    {
1084       MESA_FORMAT_SIGNED_RGBA8888_REV,
1085       fetch_texel_1d_signed_rgba8888_rev,
1086       fetch_texel_2d_signed_rgba8888_rev,
1087       fetch_texel_3d_signed_rgba8888_rev,
1088       store_texel_signed_rgba8888_rev
1089    },
1090    {
1091       MESA_FORMAT_SIGNED_R16,
1092       fetch_texel_1d_signed_r16,
1093       fetch_texel_2d_signed_r16,
1094       fetch_texel_3d_signed_r16,
1095       store_texel_signed_r16
1096    },
1097    {
1098       MESA_FORMAT_SIGNED_GR1616,
1099       fetch_texel_1d_signed_rg1616,
1100       fetch_texel_2d_signed_rg1616,
1101       fetch_texel_3d_signed_rg1616,
1102       store_texel_signed_rg1616
1103    },
1104    {
1105       MESA_FORMAT_SIGNED_RGB_16,
1106       fetch_texel_1d_signed_rgb_16,
1107       fetch_texel_2d_signed_rgb_16,
1108       fetch_texel_3d_signed_rgb_16,
1109       store_texel_signed_rgb_16
1110    },
1111    {
1112       MESA_FORMAT_SIGNED_RGBA_16,
1113       fetch_texel_1d_signed_rgba_16,
1114       fetch_texel_2d_signed_rgba_16,
1115       fetch_texel_3d_signed_rgba_16,
1116       store_texel_signed_rgba_16
1117    },
1118    {
1119       MESA_FORMAT_RGBA_16,
1120       fetch_texel_1d_rgba_16,
1121       fetch_texel_2d_rgba_16,
1122       fetch_texel_3d_rgba_16,
1123       store_texel_rgba_16
1124    },
1125    {
1126       MESA_FORMAT_RED_RGTC1,
1127       NULL,
1128       _mesa_fetch_texel_2d_f_red_rgtc1,
1129       NULL,
1130       NULL
1131    },
1132    {
1133       MESA_FORMAT_SIGNED_RED_RGTC1,
1134       NULL,
1135       _mesa_fetch_texel_2d_f_signed_red_rgtc1,
1136       NULL,
1137       NULL
1138    },
1139    {
1140       MESA_FORMAT_RG_RGTC2,
1141       NULL,
1142       _mesa_fetch_texel_2d_f_rg_rgtc2,
1143       NULL,
1144       NULL
1145    },
1146    {
1147       MESA_FORMAT_SIGNED_RG_RGTC2,
1148       NULL,
1149       _mesa_fetch_texel_2d_f_signed_rg_rgtc2,
1150       NULL,
1151       NULL
1152    },
1153    {
1154       MESA_FORMAT_L_LATC1,
1155       NULL,
1156       _mesa_fetch_texel_2d_f_l_latc1,
1157       NULL,
1158       NULL
1159    },
1160    {
1161       MESA_FORMAT_SIGNED_L_LATC1,
1162       NULL,
1163       _mesa_fetch_texel_2d_f_signed_l_latc1,
1164       NULL,
1165       NULL
1166    },
1167    {
1168       MESA_FORMAT_LA_LATC2,
1169       NULL,
1170       _mesa_fetch_texel_2d_f_la_latc2,
1171       NULL,
1172       NULL
1173    },
1174    {
1175       MESA_FORMAT_SIGNED_LA_LATC2,
1176       NULL,
1177       _mesa_fetch_texel_2d_f_signed_la_latc2,
1178       NULL,
1179       NULL
1180    },
1181    {
1182       MESA_FORMAT_ETC1_RGB8,
1183       NULL,
1184       _mesa_fetch_texel_2d_f_etc1_rgb8,
1185       NULL,
1186       NULL
1187    },
1188    {
1189       MESA_FORMAT_SIGNED_A8,
1190       fetch_texel_1d_signed_a8,
1191       fetch_texel_2d_signed_a8,
1192       fetch_texel_3d_signed_a8,
1193       store_texel_signed_a8
1194    },
1195    {
1196       MESA_FORMAT_SIGNED_L8,
1197       fetch_texel_1d_signed_l8,
1198       fetch_texel_2d_signed_l8,
1199       fetch_texel_3d_signed_l8,
1200       store_texel_signed_l8
1201    },
1202    {
1203       MESA_FORMAT_SIGNED_AL88,
1204       fetch_texel_1d_signed_al88,
1205       fetch_texel_2d_signed_al88,
1206       fetch_texel_3d_signed_al88,
1207       store_texel_signed_al88
1208    },
1209    {
1210       MESA_FORMAT_SIGNED_I8,
1211       fetch_texel_1d_signed_i8,
1212       fetch_texel_2d_signed_i8,
1213       fetch_texel_3d_signed_i8,
1214       store_texel_signed_i8
1215    },
1216    {
1217       MESA_FORMAT_SIGNED_A16,
1218       fetch_texel_1d_signed_a16,
1219       fetch_texel_2d_signed_a16,
1220       fetch_texel_3d_signed_a16,
1221       store_texel_signed_a16
1222    },
1223    {
1224       MESA_FORMAT_SIGNED_L16,
1225       fetch_texel_1d_signed_l16,
1226       fetch_texel_2d_signed_l16,
1227       fetch_texel_3d_signed_l16,
1228       store_texel_signed_l16
1229    },
1230    {
1231       MESA_FORMAT_SIGNED_AL1616,
1232       fetch_texel_1d_signed_al1616,
1233       fetch_texel_2d_signed_al1616,
1234       fetch_texel_3d_signed_al1616,
1235       store_texel_signed_al1616
1236    },
1237    {
1238       MESA_FORMAT_SIGNED_I16,
1239       fetch_texel_1d_signed_i16,
1240       fetch_texel_2d_signed_i16,
1241       fetch_texel_3d_signed_i16,
1242       store_texel_signed_i16
1243    },
1244    {
1245       MESA_FORMAT_RGB9_E5_FLOAT,
1246       fetch_texel_1d_rgb9_e5,
1247       fetch_texel_2d_rgb9_e5,
1248       fetch_texel_3d_rgb9_e5,
1249       store_texel_rgb9_e5
1250    },
1251    {
1252       MESA_FORMAT_R11_G11_B10_FLOAT,
1253       fetch_texel_1d_r11_g11_b10f,
1254       fetch_texel_2d_r11_g11_b10f,
1255       fetch_texel_3d_r11_g11_b10f,
1256       store_texel_r11_g11_b10f
1257    },
1258    {
1259       MESA_FORMAT_Z32_FLOAT,
1260       fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
1261       fetch_texel_2d_f_r_f32,
1262       fetch_texel_3d_f_r_f32,
1263       store_texel_r_f32
1264    },
1265    {
1266       MESA_FORMAT_Z32_FLOAT_X24S8,
1267       fetch_texel_1d_z32f_x24s8,
1268       fetch_texel_2d_z32f_x24s8,
1269       fetch_texel_3d_z32f_x24s8,
1270       store_texel_z32f_x24s8
1271    },
1272    {
1273       MESA_FORMAT_ARGB2101010_UINT,
1274       NULL,
1275       NULL,
1276       NULL,
1277       NULL
1278    }
1279 };
1280
1281
1282 FetchTexelFunc
1283 _mesa_get_texel_fetch_func(gl_format format, GLuint dims)
1284 {
1285 #ifdef DEBUG
1286    /* check that the table entries are sorted by format name */
1287    gl_format fmt;
1288    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
1289       assert(texfetch_funcs[fmt].Name == fmt);
1290    }
1291 #endif
1292
1293    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
1294
1295    assert(format < MESA_FORMAT_COUNT);
1296
1297    switch (dims) {
1298    case 1:
1299       return texfetch_funcs[format].Fetch1D;
1300    case 2:
1301       return texfetch_funcs[format].Fetch2D;
1302    case 3:
1303       return texfetch_funcs[format].Fetch3D;
1304    default:
1305       assert(0 && "bad dims in _mesa_get_texel_fetch_func");
1306       return NULL;
1307    }
1308 }
1309
1310
1311 StoreTexelFunc
1312 _mesa_get_texel_store_func(gl_format format)
1313 {
1314    assert(format < MESA_FORMAT_COUNT);
1315    return texfetch_funcs[format].StoreTexel;
1316 }
1317
1318
1319 /**
1320  * Initialize the texture image's FetchTexel methods.
1321  */
1322 static void
1323 set_fetch_functions(struct swrast_texture_image *texImage, GLuint dims)
1324 {
1325    gl_format format = texImage->Base.TexFormat;
1326
1327    ASSERT(dims == 1 || dims == 2 || dims == 3);
1328
1329    if (texImage->Base.TexObject->Sampler.sRGBDecode == GL_SKIP_DECODE_EXT &&
1330        _mesa_get_format_color_encoding(format) == GL_SRGB) {
1331       format = _mesa_get_srgb_format_linear(format);
1332    }
1333
1334    texImage->FetchTexel = _mesa_get_texel_fetch_func(format, dims);
1335    ASSERT(texImage->FetchTexel);
1336 }
1337
1338 void
1339 _mesa_update_fetch_functions(struct gl_texture_object *texObj)
1340 {
1341    GLuint face, i;
1342    GLuint dims;
1343
1344    dims = _mesa_get_texture_dimensions(texObj->Target);
1345
1346    for (face = 0; face < 6; face++) {
1347       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
1348          if (texObj->Image[face][i]) {
1349             set_fetch_functions(swrast_texture_image(texObj->Image[face][i]),
1350                                 dims);
1351          }
1352       }
1353    }
1354 }