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 "main/samplerobj.h"
  45 #include "s_context.h"
  46 #include "s_texfetch.h"
  47 #include "../../gallium/auxiliary/util/u_format_rgb9e5.h"
  48 #include "../../gallium/auxiliary/util/u_format_r11g11b10f.h"
  49
  50
  51 /**
  52  * Convert an 8-bit sRGB value from non-linear space to a
  53  * linear RGB value in [0, 1].
  54  * Implemented with a 256-entry lookup table.
  55  */
  56 static inline GLfloat
  57 nonlinear_to_linear(GLubyte cs8)
  58 {
  59    static GLfloat table[256];
  60    static GLboolean tableReady = GL_FALSE;
  61    if (!tableReady) {
  62       /* compute lookup table now */
  63       GLuint i;
  64       for (i = 0; i < 256; i++) {
  65          const GLfloat cs = UBYTE_TO_FLOAT(i);
  66          if (cs <= 0.04045) {
  67             table[i] = cs / 12.92f;
  68          }
  69          else {
  70             table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
  71          }
  72       }
  73       tableReady = GL_TRUE;
  74    }
  75    return table[cs8];
  76 }
  77
  78
  79
  80 /* Texel fetch routines for all supported formats
  81  */
  82 #define DIM 1
  83 #include "s_texfetch_tmp.h"
  84
  85 #define DIM 2
  86 #include "s_texfetch_tmp.h"
  87
  88 #define DIM 3
  89 #include "s_texfetch_tmp.h"
  90
  91 /**
  92  * Null texel fetch function.
  93  *
  94  * Have to have this so the FetchTexel function pointer is never NULL.
  95  */
  96 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
  97                                GLint i, GLint j, GLint k, GLfloat *texel )
  98 {
  99    (void) texImage; (void) i; (void) j; (void) k;
 100    texel[RCOMP] = 0.0;
 101    texel[GCOMP] = 0.0;
 102    texel[BCOMP] = 0.0;
 103    texel[ACOMP] = 0.0;
 104    _mesa_warning(NULL, "fetch_null_texelf() called!");
 105 }
 106
 107
 108 /**
 109  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 110  * XXX this is somewhat temporary.
 111  */
 112 static struct {
 113    gl_format Name;
 114    FetchTexelFunc Fetch1D;
 115    FetchTexelFunc Fetch2D;
 116    FetchTexelFunc Fetch3D;
 117 }
 118 texfetch_funcs[] =
 119 {
 120    {
 121       MESA_FORMAT_NONE,
 122       fetch_null_texelf,
 123       fetch_null_texelf,
 124       fetch_null_texelf
 125    },
 126
 127    {
 128       MESA_FORMAT_RGBA8888,
 129       fetch_texel_1d_f_rgba8888,
 130       fetch_texel_2d_f_rgba8888,
 131       fetch_texel_3d_f_rgba8888
 132    },
 133    {
 134       MESA_FORMAT_RGBA8888_REV,
 135       fetch_texel_1d_f_rgba8888_rev,
 136       fetch_texel_2d_f_rgba8888_rev,
 137       fetch_texel_3d_f_rgba8888_rev
 138    },
 139    {
 140       MESA_FORMAT_ARGB8888,
 141       fetch_texel_1d_f_argb8888,
 142       fetch_texel_2d_f_argb8888,
 143       fetch_texel_3d_f_argb8888
 144    },
 145    {
 146       MESA_FORMAT_ARGB8888_REV,
 147       fetch_texel_1d_f_argb8888_rev,
 148       fetch_texel_2d_f_argb8888_rev,
 149       fetch_texel_3d_f_argb8888_rev
 150    },
 151    {
 152       MESA_FORMAT_RGBX8888,
 153       fetch_texel_1d_f_rgbx8888,
 154       fetch_texel_2d_f_rgbx8888,
 155       fetch_texel_3d_f_rgbx8888
 156    },
 157    {
 158       MESA_FORMAT_RGBX8888_REV,
 159       fetch_texel_1d_f_rgbx8888_rev,
 160       fetch_texel_2d_f_rgbx8888_rev,
 161       fetch_texel_3d_f_rgbx8888_rev
 162    },
 163    {
 164       MESA_FORMAT_XRGB8888,
 165       fetch_texel_1d_f_xrgb8888,
 166       fetch_texel_2d_f_xrgb8888,
 167       fetch_texel_3d_f_xrgb8888
 168    },
 169    {
 170       MESA_FORMAT_XRGB8888_REV,
 171       fetch_texel_1d_f_xrgb8888_rev,
 172       fetch_texel_2d_f_xrgb8888_rev,
 173       fetch_texel_3d_f_xrgb8888_rev
 174    },
 175    {
 176       MESA_FORMAT_RGB888,
 177       fetch_texel_1d_f_rgb888,
 178       fetch_texel_2d_f_rgb888,
 179       fetch_texel_3d_f_rgb888
 180    },
 181    {
 182       MESA_FORMAT_BGR888,
 183       fetch_texel_1d_f_bgr888,
 184       fetch_texel_2d_f_bgr888,
 185       fetch_texel_3d_f_bgr888
 186    },
 187    {
 188       MESA_FORMAT_RGB565,
 189       fetch_texel_1d_f_rgb565,
 190       fetch_texel_2d_f_rgb565,
 191       fetch_texel_3d_f_rgb565
 192    },
 193    {
 194       MESA_FORMAT_RGB565_REV,
 195       fetch_texel_1d_f_rgb565_rev,
 196       fetch_texel_2d_f_rgb565_rev,
 197       fetch_texel_3d_f_rgb565_rev
 198    },
 199    {
 200       MESA_FORMAT_ARGB4444,
 201       fetch_texel_1d_f_argb4444,
 202       fetch_texel_2d_f_argb4444,
 203       fetch_texel_3d_f_argb4444
 204    },
 205    {
 206       MESA_FORMAT_ARGB4444_REV,
 207       fetch_texel_1d_f_argb4444_rev,
 208       fetch_texel_2d_f_argb4444_rev,
 209       fetch_texel_3d_f_argb4444_rev
 210    },
 211    {
 212       MESA_FORMAT_RGBA5551,
 213       fetch_texel_1d_f_rgba5551,
 214       fetch_texel_2d_f_rgba5551,
 215       fetch_texel_3d_f_rgba5551
 216    },
 217    {
 218       MESA_FORMAT_ARGB1555,
 219       fetch_texel_1d_f_argb1555,
 220       fetch_texel_2d_f_argb1555,
 221       fetch_texel_3d_f_argb1555
 222    },
 223    {
 224       MESA_FORMAT_ARGB1555_REV,
 225       fetch_texel_1d_f_argb1555_rev,
 226       fetch_texel_2d_f_argb1555_rev,
 227       fetch_texel_3d_f_argb1555_rev
 228    },
 229    {
 230       MESA_FORMAT_AL44,
 231       fetch_texel_1d_f_al44,
 232       fetch_texel_2d_f_al44,
 233       fetch_texel_3d_f_al44
 234    },
 235    {
 236       MESA_FORMAT_AL88,
 237       fetch_texel_1d_f_al88,
 238       fetch_texel_2d_f_al88,
 239       fetch_texel_3d_f_al88
 240    },
 241    {
 242       MESA_FORMAT_AL88_REV,
 243       fetch_texel_1d_f_al88_rev,
 244       fetch_texel_2d_f_al88_rev,
 245       fetch_texel_3d_f_al88_rev
 246    },
 247    {
 248       MESA_FORMAT_AL1616,
 249       fetch_texel_1d_f_al1616,
 250       fetch_texel_2d_f_al1616,
 251       fetch_texel_3d_f_al1616
 252    },
 253    {
 254       MESA_FORMAT_AL1616_REV,
 255       fetch_texel_1d_f_al1616_rev,
 256       fetch_texel_2d_f_al1616_rev,
 257       fetch_texel_3d_f_al1616_rev
 258    },
 259    {
 260       MESA_FORMAT_RGB332,
 261       fetch_texel_1d_f_rgb332,
 262       fetch_texel_2d_f_rgb332,
 263       fetch_texel_3d_f_rgb332
 264    },
 265    {
 266       MESA_FORMAT_A8,
 267       fetch_texel_1d_f_a8,
 268       fetch_texel_2d_f_a8,
 269       fetch_texel_3d_f_a8
 270    },
 271    {
 272       MESA_FORMAT_A16,
 273       fetch_texel_1d_f_a16,
 274       fetch_texel_2d_f_a16,
 275       fetch_texel_3d_f_a16
 276    },
 277    {
 278       MESA_FORMAT_L8,
 279       fetch_texel_1d_f_l8,
 280       fetch_texel_2d_f_l8,
 281       fetch_texel_3d_f_l8
 282    },
 283    {
 284       MESA_FORMAT_L16,
 285       fetch_texel_1d_f_l16,
 286       fetch_texel_2d_f_l16,
 287       fetch_texel_3d_f_l16
 288    },
 289    {
 290       MESA_FORMAT_I8,
 291       fetch_texel_1d_f_i8,
 292       fetch_texel_2d_f_i8,
 293       fetch_texel_3d_f_i8
 294    },
 295    {
 296       MESA_FORMAT_I16,
 297       fetch_texel_1d_f_i16,
 298       fetch_texel_2d_f_i16,
 299       fetch_texel_3d_f_i16
 300    },
 301    {
 302       MESA_FORMAT_YCBCR,
 303       fetch_texel_1d_f_ycbcr,
 304       fetch_texel_2d_f_ycbcr,
 305       fetch_texel_3d_f_ycbcr
 306    },
 307    {
 308       MESA_FORMAT_YCBCR_REV,
 309       fetch_texel_1d_f_ycbcr_rev,
 310       fetch_texel_2d_f_ycbcr_rev,
 311       fetch_texel_3d_f_ycbcr_rev
 312    },
 313    {
 314       MESA_FORMAT_R8,
 315       fetch_texel_1d_f_r8,
 316       fetch_texel_2d_f_r8,
 317       fetch_texel_3d_f_r8
 318    },
 319    {
 320       MESA_FORMAT_GR88,
 321       fetch_texel_1d_f_gr88,
 322       fetch_texel_2d_f_gr88,
 323       fetch_texel_3d_f_gr88
 324    },
 325    {
 326       MESA_FORMAT_RG88,
 327       fetch_texel_1d_f_rg88,
 328       fetch_texel_2d_f_rg88,
 329       fetch_texel_3d_f_rg88
 330    },
 331    {
 332       MESA_FORMAT_R16,
 333       fetch_texel_1d_f_r16,
 334       fetch_texel_2d_f_r16,
 335       fetch_texel_3d_f_r16
 336    },
 337    {
 338       MESA_FORMAT_RG1616,
 339       fetch_texel_1d_f_rg1616,
 340       fetch_texel_2d_f_rg1616,
 341       fetch_texel_3d_f_rg1616
 342    },
 343    {
 344       MESA_FORMAT_RG1616_REV,
 345       fetch_texel_1d_f_rg1616_rev,
 346       fetch_texel_2d_f_rg1616_rev,
 347       fetch_texel_3d_f_rg1616_rev
 348    },
 349    {
 350       MESA_FORMAT_ARGB2101010,
 351       fetch_texel_1d_f_argb2101010,
 352       fetch_texel_2d_f_argb2101010,
 353       fetch_texel_3d_f_argb2101010
 354    },
 355    {
 356       MESA_FORMAT_Z24_S8,
 357       fetch_texel_1d_f_z24_s8,
 358       fetch_texel_2d_f_z24_s8,
 359       fetch_texel_3d_f_z24_s8
 360    },
 361    {
 362       MESA_FORMAT_S8_Z24,
 363       fetch_texel_1d_f_s8_z24,
 364       fetch_texel_2d_f_s8_z24,
 365       fetch_texel_3d_f_s8_z24
 366    },
 367    {
 368       MESA_FORMAT_Z16,
 369       fetch_texel_1d_f_z16,
 370       fetch_texel_2d_f_z16,
 371       fetch_texel_3d_f_z16
 372    },
 373    {
 374       MESA_FORMAT_X8_Z24,
 375       fetch_texel_1d_f_s8_z24,
 376       fetch_texel_2d_f_s8_z24,
 377       fetch_texel_3d_f_s8_z24
 378    },
 379    {
 380       MESA_FORMAT_Z24_X8,
 381       fetch_texel_1d_f_z24_s8,
 382       fetch_texel_2d_f_z24_s8,
 383       fetch_texel_3d_f_z24_s8
 384    },
 385    {
 386       MESA_FORMAT_Z32,
 387       fetch_texel_1d_f_z32,
 388       fetch_texel_2d_f_z32,
 389       fetch_texel_3d_f_z32
 390    },
 391    {
 392       MESA_FORMAT_S8,
 393       NULL,
 394       NULL,
 395       NULL
 396    },
 397    {
 398       MESA_FORMAT_SRGB8,
 399       fetch_texel_1d_srgb8,
 400       fetch_texel_2d_srgb8,
 401       fetch_texel_3d_srgb8
 402    },
 403    {
 404       MESA_FORMAT_SRGBA8,
 405       fetch_texel_1d_srgba8,
 406       fetch_texel_2d_srgba8,
 407       fetch_texel_3d_srgba8
 408    },
 409    {
 410       MESA_FORMAT_SARGB8,
 411       fetch_texel_1d_sargb8,
 412       fetch_texel_2d_sargb8,
 413       fetch_texel_3d_sargb8
 414    },
 415    {
 416       MESA_FORMAT_SL8,
 417       fetch_texel_1d_sl8,
 418       fetch_texel_2d_sl8,
 419       fetch_texel_3d_sl8
 420    },
 421    {
 422       MESA_FORMAT_SLA8,
 423       fetch_texel_1d_sla8,
 424       fetch_texel_2d_sla8,
 425       fetch_texel_3d_sla8
 426    },
 427    {
 428       MESA_FORMAT_SRGB_DXT1,
 429       _mesa_fetch_texel_srgb_dxt1,
 430       _mesa_fetch_texel_srgb_dxt1,
 431       _mesa_fetch_texel_srgb_dxt1
 432    },
 433    {
 434       MESA_FORMAT_SRGBA_DXT1,
 435       _mesa_fetch_texel_srgba_dxt1,
 436       _mesa_fetch_texel_srgba_dxt1,
 437       _mesa_fetch_texel_srgba_dxt1
 438    },
 439    {
 440       MESA_FORMAT_SRGBA_DXT3,
 441       _mesa_fetch_texel_srgba_dxt3,
 442       _mesa_fetch_texel_srgba_dxt3,
 443       _mesa_fetch_texel_srgba_dxt3
 444    },
 445    {
 446       MESA_FORMAT_SRGBA_DXT5,
 447       _mesa_fetch_texel_srgba_dxt5,
 448       _mesa_fetch_texel_srgba_dxt5,
 449       _mesa_fetch_texel_srgba_dxt5
 450    },
 451
 452    {
 453       MESA_FORMAT_RGB_FXT1,
 454       NULL,
 455       _mesa_fetch_texel_2d_f_rgb_fxt1,
 456       NULL
 457    },
 458    {
 459       MESA_FORMAT_RGBA_FXT1,
 460       NULL,
 461       _mesa_fetch_texel_2d_f_rgba_fxt1,
 462       NULL
 463    },
 464    {
 465       MESA_FORMAT_RGB_DXT1,
 466       _mesa_fetch_texel_rgb_dxt1,
 467       _mesa_fetch_texel_rgb_dxt1,
 468       _mesa_fetch_texel_rgb_dxt1
 469    },
 470    {
 471       MESA_FORMAT_RGBA_DXT1,
 472       _mesa_fetch_texel_rgba_dxt1,
 473       _mesa_fetch_texel_rgba_dxt1,
 474       _mesa_fetch_texel_rgba_dxt1
 475    },
 476    {
 477       MESA_FORMAT_RGBA_DXT3,
 478       _mesa_fetch_texel_rgba_dxt3,
 479       _mesa_fetch_texel_rgba_dxt3,
 480       _mesa_fetch_texel_rgba_dxt3
 481    },
 482    {
 483       MESA_FORMAT_RGBA_DXT5,
 484       _mesa_fetch_texel_rgba_dxt5,
 485       _mesa_fetch_texel_rgba_dxt5,
 486       _mesa_fetch_texel_rgba_dxt5
 487    },
 488    {
 489       MESA_FORMAT_RGBA_FLOAT32,
 490       fetch_texel_1d_f_rgba_f32,
 491       fetch_texel_2d_f_rgba_f32,
 492       fetch_texel_3d_f_rgba_f32
 493    },
 494    {
 495       MESA_FORMAT_RGBA_FLOAT16,
 496       fetch_texel_1d_f_rgba_f16,
 497       fetch_texel_2d_f_rgba_f16,
 498       fetch_texel_3d_f_rgba_f16
 499    },
 500    {
 501       MESA_FORMAT_RGB_FLOAT32,
 502       fetch_texel_1d_f_rgb_f32,
 503       fetch_texel_2d_f_rgb_f32,
 504       fetch_texel_3d_f_rgb_f32
 505    },
 506    {
 507       MESA_FORMAT_RGB_FLOAT16,
 508       fetch_texel_1d_f_rgb_f16,
 509       fetch_texel_2d_f_rgb_f16,
 510       fetch_texel_3d_f_rgb_f16
 511    },
 512    {
 513       MESA_FORMAT_ALPHA_FLOAT32,
 514       fetch_texel_1d_f_alpha_f32,
 515       fetch_texel_2d_f_alpha_f32,
 516       fetch_texel_3d_f_alpha_f32
 517    },
 518    {
 519       MESA_FORMAT_ALPHA_FLOAT16,
 520       fetch_texel_1d_f_alpha_f16,
 521       fetch_texel_2d_f_alpha_f16,
 522       fetch_texel_3d_f_alpha_f16
 523    },
 524    {
 525       MESA_FORMAT_LUMINANCE_FLOAT32,
 526       fetch_texel_1d_f_luminance_f32,
 527       fetch_texel_2d_f_luminance_f32,
 528       fetch_texel_3d_f_luminance_f32
 529    },
 530    {
 531       MESA_FORMAT_LUMINANCE_FLOAT16,
 532       fetch_texel_1d_f_luminance_f16,
 533       fetch_texel_2d_f_luminance_f16,
 534       fetch_texel_3d_f_luminance_f16
 535    },
 536    {
 537       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 538       fetch_texel_1d_f_luminance_alpha_f32,
 539       fetch_texel_2d_f_luminance_alpha_f32,
 540       fetch_texel_3d_f_luminance_alpha_f32
 541    },
 542    {
 543       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 544       fetch_texel_1d_f_luminance_alpha_f16,
 545       fetch_texel_2d_f_luminance_alpha_f16,
 546       fetch_texel_3d_f_luminance_alpha_f16
 547    },
 548    {
 549       MESA_FORMAT_INTENSITY_FLOAT32,
 550       fetch_texel_1d_f_intensity_f32,
 551       fetch_texel_2d_f_intensity_f32,
 552       fetch_texel_3d_f_intensity_f32
 553    },
 554    {
 555       MESA_FORMAT_INTENSITY_FLOAT16,
 556       fetch_texel_1d_f_intensity_f16,
 557       fetch_texel_2d_f_intensity_f16,
 558       fetch_texel_3d_f_intensity_f16
 559    },
 560    {
 561       MESA_FORMAT_R_FLOAT32,
 562       fetch_texel_1d_f_r_f32,
 563       fetch_texel_2d_f_r_f32,
 564       fetch_texel_3d_f_r_f32
 565    },
 566    {
 567       MESA_FORMAT_R_FLOAT16,
 568       fetch_texel_1d_f_r_f16,
 569       fetch_texel_2d_f_r_f16,
 570       fetch_texel_3d_f_r_f16
 571    },
 572    {
 573       MESA_FORMAT_RG_FLOAT32,
 574       fetch_texel_1d_f_rg_f32,
 575       fetch_texel_2d_f_rg_f32,
 576       fetch_texel_3d_f_rg_f32
 577    },
 578    {
 579       MESA_FORMAT_RG_FLOAT16,
 580       fetch_texel_1d_f_rg_f16,
 581       fetch_texel_2d_f_rg_f16,
 582       fetch_texel_3d_f_rg_f16
 583    },
 584
 585    {
 586       MESA_FORMAT_ALPHA_UINT8,
 587       NULL,
 588       NULL,
 589       NULL
 590    },
 591
 592    {
 593       MESA_FORMAT_ALPHA_UINT16,
 594       NULL,
 595       NULL,
 596       NULL
 597    },
 598
 599    {
 600       MESA_FORMAT_ALPHA_UINT32,
 601       NULL,
 602       NULL,
 603       NULL
 604    },
 605
 606    {
 607       MESA_FORMAT_ALPHA_INT8,
 608       NULL,
 609       NULL,
 610       NULL
 611    },
 612
 613    {
 614       MESA_FORMAT_ALPHA_INT16,
 615       NULL,
 616       NULL,
 617       NULL
 618    },
 619
 620    {
 621       MESA_FORMAT_ALPHA_INT32,
 622       NULL,
 623       NULL,
 624       NULL
 625    },
 626
 627
 628    {
 629       MESA_FORMAT_INTENSITY_UINT8,
 630       NULL,
 631       NULL,
 632       NULL
 633    },
 634
 635    {
 636       MESA_FORMAT_INTENSITY_UINT16,
 637       NULL,
 638       NULL,
 639       NULL
 640    },
 641
 642    {
 643       MESA_FORMAT_INTENSITY_UINT32,
 644       NULL,
 645       NULL,
 646       NULL
 647    },
 648
 649    {
 650       MESA_FORMAT_INTENSITY_INT8,
 651       NULL,
 652       NULL,
 653       NULL
 654    },
 655
 656    {
 657       MESA_FORMAT_INTENSITY_INT16,
 658       NULL,
 659       NULL,
 660       NULL
 661    },
 662
 663    {
 664       MESA_FORMAT_INTENSITY_INT32,
 665       NULL,
 666       NULL,
 667       NULL
 668    },
 669
 670
 671    {
 672       MESA_FORMAT_LUMINANCE_UINT8,
 673       NULL,
 674       NULL,
 675       NULL
 676    },
 677
 678    {
 679       MESA_FORMAT_LUMINANCE_UINT16,
 680       NULL,
 681       NULL,
 682       NULL
 683    },
 684
 685    {
 686       MESA_FORMAT_LUMINANCE_UINT32,
 687       NULL,
 688       NULL,
 689       NULL
 690    },
 691
 692    {
 693       MESA_FORMAT_LUMINANCE_INT8,
 694       NULL,
 695       NULL,
 696       NULL
 697    },
 698
 699    {
 700       MESA_FORMAT_LUMINANCE_INT16,
 701       NULL,
 702       NULL,
 703       NULL
 704    },
 705
 706    {
 707       MESA_FORMAT_LUMINANCE_INT32,
 708       NULL,
 709       NULL,
 710       NULL
 711    },
 712
 713
 714    {
 715       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 716       NULL,
 717       NULL,
 718       NULL
 719    },
 720
 721    {
 722       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 723       NULL,
 724       NULL,
 725       NULL
 726    },
 727
 728    {
 729       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 730       NULL,
 731       NULL,
 732       NULL
 733    },
 734
 735    {
 736       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 737       NULL,
 738       NULL,
 739       NULL
 740    },
 741
 742    {
 743       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 744       NULL,
 745       NULL,
 746       NULL
 747    },
 748
 749    {
 750       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 751       NULL,
 752       NULL,
 753       NULL
 754    },
 755
 756
 757    {
 758       MESA_FORMAT_R_INT8,
 759       NULL,
 760       NULL,
 761       NULL
 762    },
 763
 764    {
 765       MESA_FORMAT_RG_INT8,
 766       NULL,
 767       NULL,
 768       NULL
 769    },
 770
 771    {
 772       MESA_FORMAT_RGB_INT8,
 773       NULL,
 774       NULL,
 775       NULL
 776    },
 777
 778    /* non-normalized, signed int */
 779    {
 780       MESA_FORMAT_RGBA_INT8,
 781       fetch_texel_1d_rgba_int8,
 782       fetch_texel_2d_rgba_int8,
 783       fetch_texel_3d_rgba_int8
 784    },
 785    {
 786       MESA_FORMAT_R_INT16,
 787       NULL,
 788       NULL,
 789       NULL
 790    },
 791    {
 792       MESA_FORMAT_RG_INT16,
 793       NULL,
 794       NULL,
 795       NULL
 796    },
 797    {
 798       MESA_FORMAT_RGB_INT16,
 799       NULL,
 800       NULL,
 801       NULL
 802    },
 803    {
 804       MESA_FORMAT_RGBA_INT16,
 805       fetch_texel_1d_rgba_int16,
 806       fetch_texel_2d_rgba_int16,
 807       fetch_texel_3d_rgba_int16
 808    },
 809    {
 810       MESA_FORMAT_R_INT32,
 811       NULL,
 812       NULL,
 813       NULL
 814    },
 815    {
 816       MESA_FORMAT_RG_INT32,
 817       NULL,
 818       NULL,
 819       NULL
 820    },
 821    {
 822       MESA_FORMAT_RGB_INT32,
 823       NULL,
 824       NULL,
 825       NULL
 826    },
 827    {
 828       MESA_FORMAT_RGBA_INT32,
 829       fetch_texel_1d_rgba_int32,
 830       fetch_texel_2d_rgba_int32,
 831       fetch_texel_3d_rgba_int32
 832    },
 833
 834    /* non-normalized, unsigned int */
 835    {
 836       MESA_FORMAT_R_UINT8,
 837       NULL,
 838       NULL,
 839       NULL
 840    },
 841    {
 842       MESA_FORMAT_RG_UINT8,
 843       NULL,
 844       NULL,
 845       NULL
 846    },
 847    {
 848       MESA_FORMAT_RGB_UINT8,
 849       NULL,
 850       NULL,
 851       NULL
 852    },
 853    {
 854       MESA_FORMAT_RGBA_UINT8,
 855       fetch_texel_1d_rgba_uint8,
 856       fetch_texel_2d_rgba_uint8,
 857       fetch_texel_3d_rgba_uint8
 858    },
 859    {
 860       MESA_FORMAT_R_UINT16,
 861       NULL,
 862       NULL,
 863       NULL
 864    },
 865    {
 866       MESA_FORMAT_RG_UINT16,
 867       NULL,
 868       NULL,
 869       NULL
 870    },
 871    {
 872       MESA_FORMAT_RGB_UINT16,
 873       NULL,
 874       NULL,
 875       NULL
 876    },
 877    {
 878       MESA_FORMAT_RGBA_UINT16,
 879       fetch_texel_1d_rgba_uint16,
 880       fetch_texel_2d_rgba_uint16,
 881       fetch_texel_3d_rgba_uint16
 882    },
 883    {
 884       MESA_FORMAT_R_UINT32,
 885       NULL,
 886       NULL,
 887       NULL
 888    },
 889    {
 890       MESA_FORMAT_RG_UINT32,
 891       NULL,
 892       NULL,
 893       NULL
 894    },
 895    {
 896       MESA_FORMAT_RGB_UINT32,
 897       NULL,
 898       NULL,
 899       NULL
 900    },
 901    {
 902       MESA_FORMAT_RGBA_UINT32,
 903       fetch_texel_1d_rgba_uint32,
 904       fetch_texel_2d_rgba_uint32,
 905       fetch_texel_3d_rgba_uint32
 906    },
 907
 908    /* dudv */
 909    {
 910       MESA_FORMAT_DUDV8,
 911       fetch_texel_1d_dudv8,
 912       fetch_texel_2d_dudv8,
 913       fetch_texel_3d_dudv8
 914    },
 915
 916    /* signed, normalized */
 917    {
 918       MESA_FORMAT_SIGNED_R8,
 919       fetch_texel_1d_signed_r8,
 920       fetch_texel_2d_signed_r8,
 921       fetch_texel_3d_signed_r8
 922    },
 923    {
 924       MESA_FORMAT_SIGNED_RG88_REV,
 925       fetch_texel_1d_signed_rg88_rev,
 926       fetch_texel_2d_signed_rg88_rev,
 927       fetch_texel_3d_signed_rg88_rev
 928    },
 929    {
 930       MESA_FORMAT_SIGNED_RGBX8888,
 931       fetch_texel_1d_signed_rgbx8888,
 932       fetch_texel_2d_signed_rgbx8888,
 933       fetch_texel_3d_signed_rgbx8888
 934    },
 935    {
 936       MESA_FORMAT_SIGNED_RGBA8888,
 937       fetch_texel_1d_signed_rgba8888,
 938       fetch_texel_2d_signed_rgba8888,
 939       fetch_texel_3d_signed_rgba8888
 940    },
 941    {
 942       MESA_FORMAT_SIGNED_RGBA8888_REV,
 943       fetch_texel_1d_signed_rgba8888_rev,
 944       fetch_texel_2d_signed_rgba8888_rev,
 945       fetch_texel_3d_signed_rgba8888_rev
 946    },
 947    {
 948       MESA_FORMAT_SIGNED_R16,
 949       fetch_texel_1d_signed_r16,
 950       fetch_texel_2d_signed_r16,
 951       fetch_texel_3d_signed_r16
 952    },
 953    {
 954       MESA_FORMAT_SIGNED_GR1616,
 955       fetch_texel_1d_signed_rg1616,
 956       fetch_texel_2d_signed_rg1616,
 957       fetch_texel_3d_signed_rg1616
 958    },
 959    {
 960       MESA_FORMAT_SIGNED_RGB_16,
 961       fetch_texel_1d_signed_rgb_16,
 962       fetch_texel_2d_signed_rgb_16,
 963       fetch_texel_3d_signed_rgb_16
 964    },
 965    {
 966       MESA_FORMAT_SIGNED_RGBA_16,
 967       fetch_texel_1d_signed_rgba_16,
 968       fetch_texel_2d_signed_rgba_16,
 969       fetch_texel_3d_signed_rgba_16
 970    },
 971    {
 972       MESA_FORMAT_RGBA_16,
 973       fetch_texel_1d_rgba_16,
 974       fetch_texel_2d_rgba_16,
 975       fetch_texel_3d_rgba_16
 976    },
 977    {
 978       MESA_FORMAT_RED_RGTC1,
 979       _mesa_fetch_texel_red_rgtc1,
 980       _mesa_fetch_texel_red_rgtc1,
 981       _mesa_fetch_texel_red_rgtc1
 982    },
 983    {
 984       MESA_FORMAT_SIGNED_RED_RGTC1,
 985       _mesa_fetch_texel_signed_red_rgtc1,
 986       _mesa_fetch_texel_signed_red_rgtc1,
 987       _mesa_fetch_texel_signed_red_rgtc1
 988    },
 989    {
 990       MESA_FORMAT_RG_RGTC2,
 991       _mesa_fetch_texel_rg_rgtc2,
 992       _mesa_fetch_texel_rg_rgtc2,
 993       _mesa_fetch_texel_rg_rgtc2
 994    },
 995    {
 996       MESA_FORMAT_SIGNED_RG_RGTC2,
 997       _mesa_fetch_texel_signed_rg_rgtc2,
 998       _mesa_fetch_texel_signed_rg_rgtc2,
 999       _mesa_fetch_texel_signed_rg_rgtc2
1000    },
1001    {
1002       MESA_FORMAT_L_LATC1,
1003       _mesa_fetch_texel_l_latc1,
1004       _mesa_fetch_texel_l_latc1,
1005       _mesa_fetch_texel_l_latc1
1006    },
1007    {
1008       MESA_FORMAT_SIGNED_L_LATC1,
1009       _mesa_fetch_texel_signed_l_latc1,
1010       _mesa_fetch_texel_signed_l_latc1,
1011       _mesa_fetch_texel_signed_l_latc1
1012    },
1013    {
1014       MESA_FORMAT_LA_LATC2,
1015       _mesa_fetch_texel_la_latc2,
1016       _mesa_fetch_texel_la_latc2,
1017       _mesa_fetch_texel_la_latc2
1018    },
1019    {
1020       MESA_FORMAT_SIGNED_LA_LATC2,
1021       _mesa_fetch_texel_signed_la_latc2,
1022       _mesa_fetch_texel_signed_la_latc2,
1023       _mesa_fetch_texel_signed_la_latc2
1024    },
1025    {
1026       MESA_FORMAT_ETC1_RGB8,
1027       NULL,
1028       _mesa_fetch_texel_2d_f_etc1_rgb8,
1029       NULL
1030    },
1031    {
1032       MESA_FORMAT_ETC2_RGB8,
1033       NULL,
1034       _mesa_fetch_texel_2d_f_etc2_rgb8,
1035       NULL
1036    },
1037    {
1038       MESA_FORMAT_ETC2_SRGB8,
1039       NULL,
1040       _mesa_fetch_texel_2d_f_etc2_srgb8,
1041       NULL
1042    },
1043    {
1044       MESA_FORMAT_ETC2_RGBA8_EAC,
1045       NULL,
1046       _mesa_fetch_texel_2d_f_etc2_rgba8_eac,
1047       NULL
1048    },
1049    {
1050       MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC,
1051       NULL,
1052       NULL /* _mesa_fetch_texel_2d_f_etc2_srgb8_alpha8_eac -- not implemented yet */,
1053       NULL
1054    },
1055    {
1056       MESA_FORMAT_ETC2_R11_EAC,
1057       NULL,
1058       NULL /* _mesa_fetch_texel_2d_f_etc2_r11_eac -- not implemented yet */,
1059       NULL
1060    },
1061    {
1062       MESA_FORMAT_ETC2_RG11_EAC,
1063       NULL,
1064       NULL /* _mesa_fetch_texel_2d_f_etc2_rg11_eac -- not implemented yet */,
1065       NULL
1066    },
1067    {
1068       MESA_FORMAT_ETC2_SIGNED_R11_EAC,
1069       NULL,
1070       NULL /* _mesa_fetch_texel_2d_f_etc2_signed_r11_eac -- not implemented yet */,
1071       NULL
1072    },
1073    {
1074       MESA_FORMAT_ETC2_SIGNED_RG11_EAC,
1075       NULL,
1076       NULL /* _mesa_fetch_texel_2d_f_etc2_signed_rg11_eac -- not implemented yet */,
1077       NULL
1078    },
1079    {
1080       MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1,
1081       NULL,
1082       NULL /* _mesa_fetch_texel_2d_f_etc2_rgb8_punchthrough_alpha1 -- not implemented yet */,
1083       NULL
1084    },
1085    {
1086       MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1,
1087       NULL,
1088       NULL /* _mesa_fetch_texel_2d_f_etc2_srgb8_punchthrough_alpha1 -- not implemented yet */,
1089       NULL
1090    },
1091    {
1092       MESA_FORMAT_SIGNED_A8,
1093       fetch_texel_1d_signed_a8,
1094       fetch_texel_2d_signed_a8,
1095       fetch_texel_3d_signed_a8
1096    },
1097    {
1098       MESA_FORMAT_SIGNED_L8,
1099       fetch_texel_1d_signed_l8,
1100       fetch_texel_2d_signed_l8,
1101       fetch_texel_3d_signed_l8
1102    },
1103    {
1104       MESA_FORMAT_SIGNED_AL88,
1105       fetch_texel_1d_signed_al88,
1106       fetch_texel_2d_signed_al88,
1107       fetch_texel_3d_signed_al88
1108    },
1109    {
1110       MESA_FORMAT_SIGNED_I8,
1111       fetch_texel_1d_signed_i8,
1112       fetch_texel_2d_signed_i8,
1113       fetch_texel_3d_signed_i8
1114    },
1115    {
1116       MESA_FORMAT_SIGNED_A16,
1117       fetch_texel_1d_signed_a16,
1118       fetch_texel_2d_signed_a16,
1119       fetch_texel_3d_signed_a16
1120    },
1121    {
1122       MESA_FORMAT_SIGNED_L16,
1123       fetch_texel_1d_signed_l16,
1124       fetch_texel_2d_signed_l16,
1125       fetch_texel_3d_signed_l16
1126    },
1127    {
1128       MESA_FORMAT_SIGNED_AL1616,
1129       fetch_texel_1d_signed_al1616,
1130       fetch_texel_2d_signed_al1616,
1131       fetch_texel_3d_signed_al1616
1132    },
1133    {
1134       MESA_FORMAT_SIGNED_I16,
1135       fetch_texel_1d_signed_i16,
1136       fetch_texel_2d_signed_i16,
1137       fetch_texel_3d_signed_i16
1138    },
1139    {
1140       MESA_FORMAT_RGB9_E5_FLOAT,
1141       fetch_texel_1d_rgb9_e5,
1142       fetch_texel_2d_rgb9_e5,
1143       fetch_texel_3d_rgb9_e5
1144    },
1145    {
1146       MESA_FORMAT_R11_G11_B10_FLOAT,
1147       fetch_texel_1d_r11_g11_b10f,
1148       fetch_texel_2d_r11_g11_b10f,
1149       fetch_texel_3d_r11_g11_b10f
1150    },
1151    {
1152       MESA_FORMAT_Z32_FLOAT,
1153       fetch_texel_1d_f_r_f32, /* Reuse the R32F functions. */
1154       fetch_texel_2d_f_r_f32,
1155       fetch_texel_3d_f_r_f32
1156    },
1157    {
1158       MESA_FORMAT_Z32_FLOAT_X24S8,
1159       fetch_texel_1d_z32f_x24s8,
1160       fetch_texel_2d_z32f_x24s8,
1161       fetch_texel_3d_z32f_x24s8
1162    },
1163    {
1164       MESA_FORMAT_ARGB2101010_UINT,
1165       NULL,
1166       NULL,
1167       NULL
1168    },
1169    {
1170       MESA_FORMAT_ABGR2101010_UINT,
1171       NULL,
1172       NULL,
1173       NULL
1174    },
1175 };
1176
1177
1178 FetchTexelFunc
1179 _mesa_get_texel_fetch_func(gl_format format, GLuint dims)
1180 {
1181 #ifdef DEBUG
1182    /* check that the table entries are sorted by format name */
1183    gl_format fmt;
1184    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
1185       assert(texfetch_funcs[fmt].Name == fmt);
1186    }
1187 #endif
1188
1189    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
1190
1191    assert(format < MESA_FORMAT_COUNT);
1192
1193    switch (dims) {
1194    case 1:
1195       return texfetch_funcs[format].Fetch1D;
1196    case 2:
1197       return texfetch_funcs[format].Fetch2D;
1198    case 3:
1199       return texfetch_funcs[format].Fetch3D;
1200    default:
1201       assert(0 && "bad dims in _mesa_get_texel_fetch_func");
1202       return NULL;
1203    }
1204 }
1205
1206
1207 /**
1208  * Initialize the texture image's FetchTexel methods.
1209  */
1210 static void
1211 set_fetch_functions(struct gl_sampler_object *samp,
1212                     struct swrast_texture_image *texImage, GLuint dims)
1213 {
1214    gl_format format = texImage->Base.TexFormat;
1215
1216    ASSERT(dims == 1 || dims == 2 || dims == 3);
1217
1218    if (samp->sRGBDecode == GL_SKIP_DECODE_EXT &&
1219        _mesa_get_format_color_encoding(format) == GL_SRGB) {
1220       format = _mesa_get_srgb_format_linear(format);
1221    }
1222
1223    texImage->FetchTexel = _mesa_get_texel_fetch_func(format, dims);
1224    ASSERT(texImage->FetchTexel);
1225 }
1226
1227 void
1228 _mesa_update_fetch_functions(struct gl_context *ctx, GLuint unit)
1229 {
1230    struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;
1231    struct gl_sampler_object *samp;
1232    GLuint face, i;
1233    GLuint dims;
1234
1235    if (!texObj)
1236       return;
1237
1238    samp = _mesa_get_samplerobj(ctx, unit);
1239
1240    dims = _mesa_get_texture_dimensions(texObj->Target);
1241
1242    for (face = 0; face < 6; face++) {
1243       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
1244          if (texObj->Image[face][i]) {
1245             set_fetch_functions(samp,
1246                                 swrast_texture_image(texObj->Image[face][i]),
1247                                 dims);
1248          }
1249       }
1250    }
1251 }