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/teximage.h"
  39 #include "s_context.h"
  40 #include "s_texfetch.h"
  41
  42
  43 /**
  44  * Convert an 8-bit sRGB value from non-linear space to a
  45  * linear RGB value in [0, 1].
  46  * Implemented with a 256-entry lookup table.
  47  */
  48 static inline GLfloat
  49 nonlinear_to_linear(GLubyte cs8)
  50 {
  51    static GLfloat table[256];
  52    static GLboolean tableReady = GL_FALSE;
  53    if (!tableReady) {
  54       /* compute lookup table now */
  55       GLuint i;
  56       for (i = 0; i < 256; i++) {
  57          const GLfloat cs = UBYTE_TO_FLOAT(i);
  58          if (cs <= 0.04045) {
  59             table[i] = cs / 12.92f;
  60          }
  61          else {
  62             table[i] = (GLfloat) pow((cs + 0.055) / 1.055, 2.4);
  63          }
  64       }
  65       tableReady = GL_TRUE;
  66    }
  67    return table[cs8];
  68 }
  69
  70
  71
  72 /* Texel fetch routines for all supported formats
  73  */
  74 #define DIM 1
  75 #include "s_texfetch_tmp.h"
  76
  77 #define DIM 2
  78 #include "s_texfetch_tmp.h"
  79
  80 #define DIM 3
  81 #include "s_texfetch_tmp.h"
  82
  83 /**
  84  * Null texel fetch function.
  85  *
  86  * Have to have this so the FetchTexel function pointer is never NULL.
  87  */
  88 static void fetch_null_texelf( const struct swrast_texture_image *texImage,
  89                                GLint i, GLint j, GLint k, GLfloat *texel )
  90 {
  91    (void) texImage; (void) i; (void) j; (void) k;
  92    texel[RCOMP] = 0.0;
  93    texel[GCOMP] = 0.0;
  94    texel[BCOMP] = 0.0;
  95    texel[ACOMP] = 0.0;
  96    _mesa_warning(NULL, "fetch_null_texelf() called!");
  97 }
  98
  99
 100 /**
 101  * Table to map MESA_FORMAT_ to texel fetch/store funcs.
 102  * XXX this is somewhat temporary.
 103  */
 104 static struct {
 105    gl_format Name;
 106    FetchTexelFunc Fetch1D;
 107    FetchTexelFunc Fetch2D;
 108    FetchTexelFunc Fetch3D;
 109 }
 110 texfetch_funcs[MESA_FORMAT_COUNT] =
 111 {
 112    {
 113       MESA_FORMAT_NONE,
 114       fetch_null_texelf,
 115       fetch_null_texelf,
 116       fetch_null_texelf
 117    },
 118
 119    {
 120       MESA_FORMAT_RGBA8888,
 121       fetch_texel_1d_f_rgba8888,
 122       fetch_texel_2d_f_rgba8888,
 123       fetch_texel_3d_f_rgba8888
 124    },
 125    {
 126       MESA_FORMAT_RGBA8888_REV,
 127       fetch_texel_1d_f_rgba8888_rev,
 128       fetch_texel_2d_f_rgba8888_rev,
 129       fetch_texel_3d_f_rgba8888_rev
 130    },
 131    {
 132       MESA_FORMAT_ARGB8888,
 133       fetch_texel_1d_f_argb8888,
 134       fetch_texel_2d_f_argb8888,
 135       fetch_texel_3d_f_argb8888
 136    },
 137    {
 138       MESA_FORMAT_ARGB8888_REV,
 139       fetch_texel_1d_f_argb8888_rev,
 140       fetch_texel_2d_f_argb8888_rev,
 141       fetch_texel_3d_f_argb8888_rev
 142    },
 143    {
 144       MESA_FORMAT_RGBX8888,
 145       fetch_texel_1d_f_rgbx8888,
 146       fetch_texel_2d_f_rgbx8888,
 147       fetch_texel_3d_f_rgbx8888
 148    },
 149    {
 150       MESA_FORMAT_RGBX8888_REV,
 151       fetch_texel_1d_f_rgbx8888_rev,
 152       fetch_texel_2d_f_rgbx8888_rev,
 153       fetch_texel_3d_f_rgbx8888_rev
 154    },
 155    {
 156       MESA_FORMAT_XRGB8888,
 157       fetch_texel_1d_f_xrgb8888,
 158       fetch_texel_2d_f_xrgb8888,
 159       fetch_texel_3d_f_xrgb8888
 160    },
 161    {
 162       MESA_FORMAT_XRGB8888_REV,
 163       fetch_texel_1d_f_xrgb8888_rev,
 164       fetch_texel_2d_f_xrgb8888_rev,
 165       fetch_texel_3d_f_xrgb8888_rev
 166    },
 167    {
 168       MESA_FORMAT_RGB888,
 169       fetch_texel_1d_f_rgb888,
 170       fetch_texel_2d_f_rgb888,
 171       fetch_texel_3d_f_rgb888
 172    },
 173    {
 174       MESA_FORMAT_BGR888,
 175       fetch_texel_1d_f_bgr888,
 176       fetch_texel_2d_f_bgr888,
 177       fetch_texel_3d_f_bgr888
 178    },
 179    {
 180       MESA_FORMAT_RGB565,
 181       fetch_texel_1d_f_rgb565,
 182       fetch_texel_2d_f_rgb565,
 183       fetch_texel_3d_f_rgb565
 184    },
 185    {
 186       MESA_FORMAT_RGB565_REV,
 187       fetch_texel_1d_f_rgb565_rev,
 188       fetch_texel_2d_f_rgb565_rev,
 189       fetch_texel_3d_f_rgb565_rev
 190    },
 191    {
 192       MESA_FORMAT_ARGB4444,
 193       fetch_texel_1d_f_argb4444,
 194       fetch_texel_2d_f_argb4444,
 195       fetch_texel_3d_f_argb4444
 196    },
 197    {
 198       MESA_FORMAT_ARGB4444_REV,
 199       fetch_texel_1d_f_argb4444_rev,
 200       fetch_texel_2d_f_argb4444_rev,
 201       fetch_texel_3d_f_argb4444_rev
 202    },
 203    {
 204       MESA_FORMAT_RGBA5551,
 205       fetch_texel_1d_f_rgba5551,
 206       fetch_texel_2d_f_rgba5551,
 207       fetch_texel_3d_f_rgba5551
 208    },
 209    {
 210       MESA_FORMAT_ARGB1555,
 211       fetch_texel_1d_f_argb1555,
 212       fetch_texel_2d_f_argb1555,
 213       fetch_texel_3d_f_argb1555
 214    },
 215    {
 216       MESA_FORMAT_ARGB1555_REV,
 217       fetch_texel_1d_f_argb1555_rev,
 218       fetch_texel_2d_f_argb1555_rev,
 219       fetch_texel_3d_f_argb1555_rev
 220    },
 221    {
 222       MESA_FORMAT_AL44,
 223       fetch_texel_1d_f_al44,
 224       fetch_texel_2d_f_al44,
 225       fetch_texel_3d_f_al44
 226    },
 227    {
 228       MESA_FORMAT_AL88,
 229       fetch_texel_1d_f_al88,
 230       fetch_texel_2d_f_al88,
 231       fetch_texel_3d_f_al88
 232    },
 233    {
 234       MESA_FORMAT_AL88_REV,
 235       fetch_texel_1d_f_al88_rev,
 236       fetch_texel_2d_f_al88_rev,
 237       fetch_texel_3d_f_al88_rev
 238    },
 239    {
 240       MESA_FORMAT_AL1616,
 241       fetch_texel_1d_f_al1616,
 242       fetch_texel_2d_f_al1616,
 243       fetch_texel_3d_f_al1616
 244    },
 245    {
 246       MESA_FORMAT_AL1616_REV,
 247       fetch_texel_1d_f_al1616_rev,
 248       fetch_texel_2d_f_al1616_rev,
 249       fetch_texel_3d_f_al1616_rev
 250    },
 251    {
 252       MESA_FORMAT_RGB332,
 253       fetch_texel_1d_f_rgb332,
 254       fetch_texel_2d_f_rgb332,
 255       fetch_texel_3d_f_rgb332
 256    },
 257    {
 258       MESA_FORMAT_A8,
 259       fetch_texel_1d_f_a8,
 260       fetch_texel_2d_f_a8,
 261       fetch_texel_3d_f_a8
 262    },
 263    {
 264       MESA_FORMAT_A16,
 265       fetch_texel_1d_f_a16,
 266       fetch_texel_2d_f_a16,
 267       fetch_texel_3d_f_a16
 268    },
 269    {
 270       MESA_FORMAT_L8,
 271       fetch_texel_1d_f_l8,
 272       fetch_texel_2d_f_l8,
 273       fetch_texel_3d_f_l8
 274    },
 275    {
 276       MESA_FORMAT_L16,
 277       fetch_texel_1d_f_l16,
 278       fetch_texel_2d_f_l16,
 279       fetch_texel_3d_f_l16
 280    },
 281    {
 282       MESA_FORMAT_I8,
 283       fetch_texel_1d_f_i8,
 284       fetch_texel_2d_f_i8,
 285       fetch_texel_3d_f_i8
 286    },
 287    {
 288       MESA_FORMAT_I16,
 289       fetch_texel_1d_f_i16,
 290       fetch_texel_2d_f_i16,
 291       fetch_texel_3d_f_i16
 292    },
 293    {
 294       MESA_FORMAT_YCBCR,
 295       fetch_texel_1d_f_ycbcr,
 296       fetch_texel_2d_f_ycbcr,
 297       fetch_texel_3d_f_ycbcr
 298    },
 299    {
 300       MESA_FORMAT_YCBCR_REV,
 301       fetch_texel_1d_f_ycbcr_rev,
 302       fetch_texel_2d_f_ycbcr_rev,
 303       fetch_texel_3d_f_ycbcr_rev
 304    },
 305    {
 306       MESA_FORMAT_Z16,
 307       fetch_texel_1d_f_z16,
 308       fetch_texel_2d_f_z16,
 309       fetch_texel_3d_f_z16
 310    },
 311    {
 312       MESA_FORMAT_X8_Z24,
 313       fetch_texel_1d_f_s8_z24,
 314       fetch_texel_2d_f_s8_z24,
 315       fetch_texel_3d_f_s8_z24
 316    },
 317    {
 318       MESA_FORMAT_Z24_X8,
 319       fetch_texel_1d_f_z24_s8,
 320       fetch_texel_2d_f_z24_s8,
 321       fetch_texel_3d_f_z24_s8
 322    },
 323    {
 324       MESA_FORMAT_Z32,
 325       fetch_texel_1d_f_z32,
 326       fetch_texel_2d_f_z32,
 327       fetch_texel_3d_f_z32
 328    },
 329    {
 330       MESA_FORMAT_S8,
 331       NULL,
 332       NULL,
 333       NULL
 334    },
 335    {
 336       MESA_FORMAT_RGBA_FLOAT32,
 337       fetch_texel_1d_f_rgba_f32,
 338       fetch_texel_2d_f_rgba_f32,
 339       fetch_texel_3d_f_rgba_f32
 340    },
 341    {
 342       MESA_FORMAT_RGBA_FLOAT16,
 343       fetch_texel_1d_f_rgba_f16,
 344       fetch_texel_2d_f_rgba_f16,
 345       fetch_texel_3d_f_rgba_f16
 346    },
 347    {
 348       MESA_FORMAT_RGB_FLOAT32,
 349       fetch_texel_1d_f_rgb_f32,
 350       fetch_texel_2d_f_rgb_f32,
 351       fetch_texel_3d_f_rgb_f32
 352    },
 353    {
 354       MESA_FORMAT_RGB_FLOAT16,
 355       fetch_texel_1d_f_rgb_f16,
 356       fetch_texel_2d_f_rgb_f16,
 357       fetch_texel_3d_f_rgb_f16
 358    },
 359    {
 360       MESA_FORMAT_ALPHA_FLOAT32,
 361       fetch_texel_1d_f_alpha_f32,
 362       fetch_texel_2d_f_alpha_f32,
 363       fetch_texel_3d_f_alpha_f32
 364    },
 365    {
 366       MESA_FORMAT_ALPHA_FLOAT16,
 367       fetch_texel_1d_f_alpha_f16,
 368       fetch_texel_2d_f_alpha_f16,
 369       fetch_texel_3d_f_alpha_f16
 370    },
 371    {
 372       MESA_FORMAT_LUMINANCE_FLOAT32,
 373       fetch_texel_1d_f_luminance_f32,
 374       fetch_texel_2d_f_luminance_f32,
 375       fetch_texel_3d_f_luminance_f32
 376    },
 377    {
 378       MESA_FORMAT_LUMINANCE_FLOAT16,
 379       fetch_texel_1d_f_luminance_f16,
 380       fetch_texel_2d_f_luminance_f16,
 381       fetch_texel_3d_f_luminance_f16
 382    },
 383    {
 384       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32,
 385       fetch_texel_1d_f_luminance_alpha_f32,
 386       fetch_texel_2d_f_luminance_alpha_f32,
 387       fetch_texel_3d_f_luminance_alpha_f32
 388    },
 389    {
 390       MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16,
 391       fetch_texel_1d_f_luminance_alpha_f16,
 392       fetch_texel_2d_f_luminance_alpha_f16,
 393       fetch_texel_3d_f_luminance_alpha_f16
 394    },
 395    {
 396       MESA_FORMAT_INTENSITY_FLOAT32,
 397       fetch_texel_1d_f_intensity_f32,
 398       fetch_texel_2d_f_intensity_f32,
 399       fetch_texel_3d_f_intensity_f32
 400    },
 401    {
 402       MESA_FORMAT_INTENSITY_FLOAT16,
 403       fetch_texel_1d_f_intensity_f16,
 404       fetch_texel_2d_f_intensity_f16,
 405       fetch_texel_3d_f_intensity_f16
 406    },
 407
 408    {
 409       MESA_FORMAT_ALPHA_UINT8,
 410       NULL,
 411       NULL,
 412       NULL
 413    },
 414
 415    {
 416       MESA_FORMAT_ALPHA_UINT16,
 417       NULL,
 418       NULL,
 419       NULL
 420    },
 421
 422    {
 423       MESA_FORMAT_ALPHA_UINT32,
 424       NULL,
 425       NULL,
 426       NULL
 427    },
 428
 429    {
 430       MESA_FORMAT_ALPHA_INT8,
 431       NULL,
 432       NULL,
 433       NULL
 434    },
 435
 436    {
 437       MESA_FORMAT_ALPHA_INT16,
 438       NULL,
 439       NULL,
 440       NULL
 441    },
 442
 443    {
 444       MESA_FORMAT_ALPHA_INT32,
 445       NULL,
 446       NULL,
 447       NULL
 448    },
 449
 450
 451    {
 452       MESA_FORMAT_INTENSITY_UINT8,
 453       NULL,
 454       NULL,
 455       NULL
 456    },
 457
 458    {
 459       MESA_FORMAT_INTENSITY_UINT16,
 460       NULL,
 461       NULL,
 462       NULL
 463    },
 464
 465    {
 466       MESA_FORMAT_INTENSITY_UINT32,
 467       NULL,
 468       NULL,
 469       NULL
 470    },
 471
 472    {
 473       MESA_FORMAT_INTENSITY_INT8,
 474       NULL,
 475       NULL,
 476       NULL
 477    },
 478
 479    {
 480       MESA_FORMAT_INTENSITY_INT16,
 481       NULL,
 482       NULL,
 483       NULL
 484    },
 485
 486    {
 487       MESA_FORMAT_INTENSITY_INT32,
 488       NULL,
 489       NULL,
 490       NULL
 491    },
 492
 493
 494    {
 495       MESA_FORMAT_LUMINANCE_UINT8,
 496       NULL,
 497       NULL,
 498       NULL
 499    },
 500
 501    {
 502       MESA_FORMAT_LUMINANCE_UINT16,
 503       NULL,
 504       NULL,
 505       NULL
 506    },
 507
 508    {
 509       MESA_FORMAT_LUMINANCE_UINT32,
 510       NULL,
 511       NULL,
 512       NULL
 513    },
 514
 515    {
 516       MESA_FORMAT_LUMINANCE_INT8,
 517       NULL,
 518       NULL,
 519       NULL
 520    },
 521
 522    {
 523       MESA_FORMAT_LUMINANCE_INT16,
 524       NULL,
 525       NULL,
 526       NULL
 527    },
 528
 529    {
 530       MESA_FORMAT_LUMINANCE_INT32,
 531       NULL,
 532       NULL,
 533       NULL
 534    },
 535
 536
 537    {
 538       MESA_FORMAT_LUMINANCE_ALPHA_UINT8,
 539       NULL,
 540       NULL,
 541       NULL
 542    },
 543
 544    {
 545       MESA_FORMAT_LUMINANCE_ALPHA_UINT16,
 546       NULL,
 547       NULL,
 548       NULL
 549    },
 550
 551    {
 552       MESA_FORMAT_LUMINANCE_ALPHA_UINT32,
 553       NULL,
 554       NULL,
 555       NULL
 556    },
 557
 558    {
 559       MESA_FORMAT_LUMINANCE_ALPHA_INT8,
 560       NULL,
 561       NULL,
 562       NULL
 563    },
 564
 565    {
 566       MESA_FORMAT_LUMINANCE_ALPHA_INT16,
 567       NULL,
 568       NULL,
 569       NULL
 570    },
 571
 572    {
 573       MESA_FORMAT_LUMINANCE_ALPHA_INT32,
 574       NULL,
 575       NULL,
 576       NULL
 577    },
 578
 579    {
 580       MESA_FORMAT_RGB_INT8,
 581       NULL,
 582       NULL,
 583       NULL
 584    },
 585
 586    /* non-normalized, signed int */
 587    {
 588       MESA_FORMAT_RGBA_INT8,
 589       fetch_texel_1d_rgba_int8,
 590       fetch_texel_2d_rgba_int8,
 591       fetch_texel_3d_rgba_int8
 592    },
 593    {
 594       MESA_FORMAT_RGB_INT16,
 595       NULL,
 596       NULL,
 597       NULL
 598    },
 599    {
 600       MESA_FORMAT_RGBA_INT16,
 601       fetch_texel_1d_rgba_int16,
 602       fetch_texel_2d_rgba_int16,
 603       fetch_texel_3d_rgba_int16
 604    },
 605    {
 606       MESA_FORMAT_RGB_INT32,
 607       NULL,
 608       NULL,
 609       NULL
 610    },
 611    {
 612       MESA_FORMAT_RGBA_INT32,
 613       fetch_texel_1d_rgba_int32,
 614       fetch_texel_2d_rgba_int32,
 615       fetch_texel_3d_rgba_int32
 616    },
 617
 618    /* non-normalized, unsigned int */
 619    {
 620       MESA_FORMAT_RGB_UINT8,
 621       NULL,
 622       NULL,
 623       NULL
 624    },
 625    {
 626       MESA_FORMAT_RGBA_UINT8,
 627       fetch_texel_1d_rgba_uint8,
 628       fetch_texel_2d_rgba_uint8,
 629       fetch_texel_3d_rgba_uint8
 630    },
 631    {
 632       MESA_FORMAT_RGB_UINT16,
 633       NULL,
 634       NULL,
 635       NULL
 636    },
 637    {
 638       MESA_FORMAT_RGBA_UINT16,
 639       fetch_texel_1d_rgba_uint16,
 640       fetch_texel_2d_rgba_uint16,
 641       fetch_texel_3d_rgba_uint16
 642    },
 643    {
 644       MESA_FORMAT_RGB_UINT32,
 645       NULL,
 646       NULL,
 647       NULL
 648    },
 649    {
 650       MESA_FORMAT_RGBA_UINT32,
 651       fetch_texel_1d_rgba_uint32,
 652       fetch_texel_2d_rgba_uint32,
 653       fetch_texel_3d_rgba_uint32
 654    },
 655
 656    /* signed, normalized */
 657    {
 658       MESA_FORMAT_SIGNED_RGBA_16,
 659       fetch_texel_1d_signed_rgba_16,
 660       fetch_texel_2d_signed_rgba_16,
 661       fetch_texel_3d_signed_rgba_16
 662    },
 663    {
 664       MESA_FORMAT_RGBA_16,
 665       fetch_texel_1d_rgba_16,
 666       fetch_texel_2d_rgba_16,
 667       fetch_texel_3d_rgba_16
 668    }
 669 };
 670
 671
 672 FetchTexelFunc
 673 _mesa_get_texel_fetch_func(gl_format format, GLuint dims)
 674 {
 675 #ifdef DEBUG
 676    /* check that the table entries are sorted by format name */
 677    gl_format fmt;
 678    for (fmt = 0; fmt < MESA_FORMAT_COUNT; fmt++) {
 679       assert(texfetch_funcs[fmt].Name == fmt);
 680    }
 681 #endif
 682
 683    STATIC_ASSERT(Elements(texfetch_funcs) == MESA_FORMAT_COUNT);
 684
 685    assert(format < MESA_FORMAT_COUNT);
 686
 687    switch (dims) {
 688    case 1:
 689       return texfetch_funcs[format].Fetch1D;
 690    case 2:
 691       return texfetch_funcs[format].Fetch2D;
 692    case 3:
 693       return texfetch_funcs[format].Fetch3D;
 694    default:
 695       assert(0 && "bad dims in _mesa_get_texel_fetch_func");
 696       return NULL;
 697    }
 698 }
 699
 700
 701 /**
 702  * Initialize the texture image's FetchTexel methods.
 703  */
 704 static void
 705 set_fetch_functions(struct swrast_texture_image *texImage, GLuint dims)
 706 {
 707    gl_format format = texImage->Base.TexFormat;
 708
 709    ASSERT(dims == 1 || dims == 2 || dims == 3);
 710
 711    texImage->FetchTexel = _mesa_get_texel_fetch_func(format, dims);
 712    ASSERT(texImage->FetchTexel);
 713 }
 714
 715 void
 716 _mesa_update_fetch_functions(struct gl_texture_object *texObj)
 717 {
 718    GLuint face, i;
 719    GLuint dims;
 720
 721    dims = _mesa_get_texture_dimensions(texObj->Target);
 722
 723    for (face = 0; face < 6; face++) {
 724       for (i = 0; i < MAX_TEXTURE_LEVELS; i++) {
 725          if (texObj->Image[face][i]) {
 726             set_fetch_functions(swrast_texture_image(texObj->Image[face][i]),
 727                                 dims);
 728          }
 729       }
 730    }
 731 }