src/mesa/main/formats.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (c) 2008-2009  VMware, Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 #include "errors.h"
  28 #include "imports.h"
  29 #include "formats.h"
  30 #include "macros.h"
  31 #include "glformats.h"
  32 #include "c11/threads.h"
  33 #include "util/hash_table.h"
  34
  35 /**
  36  * Information about texture formats.
  37  */
  38 struct mesa_format_info
  39 {
  40    mesa_format Name;
  41
  42    /** text name for debugging */
  43    const char *StrName;
  44
  45    enum mesa_format_layout Layout;
  46
  47    /**
  48     * Base format is one of GL_RED, GL_RG, GL_RGB, GL_RGBA, GL_ALPHA,
  49     * GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_YCBCR_MESA,
  50     * GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
  51     */
  52    GLenum BaseFormat;
  53
  54    /**
  55     * Logical data type: one of  GL_UNSIGNED_NORMALIZED, GL_SIGNED_NORMALIZED,
  56     * GL_UNSIGNED_INT, GL_INT, GL_FLOAT.
  57     */
  58    GLenum DataType;
  59
  60    uint8_t RedBits;
  61    uint8_t GreenBits;
  62    uint8_t BlueBits;
  63    uint8_t AlphaBits;
  64    uint8_t LuminanceBits;
  65    uint8_t IntensityBits;
  66    uint8_t DepthBits;
  67    uint8_t StencilBits;
  68
  69    bool IsSRGBFormat;
  70
  71    /**
  72     * To describe compressed formats.  If not compressed, Width=Height=Depth=1.
  73     */
  74    uint8_t BlockWidth, BlockHeight, BlockDepth;
  75    uint8_t BytesPerBlock;
  76
  77    uint8_t Swizzle[4];
  78    mesa_array_format ArrayFormat;
  79 };
  80
  81 #include "format_info.h"
  82
  83 static const struct mesa_format_info *
  84 _mesa_get_format_info(mesa_format format)
  85 {
  86    const struct mesa_format_info *info = &format_info[format];
  87    STATIC_ASSERT(ARRAY_SIZE(format_info) == MESA_FORMAT_COUNT);
  88    assert(info->Name == format);
  89    return info;
  90 }
  91
  92
  93 /** Return string name of format (for debugging) */
  94 const char *
  95 _mesa_get_format_name(mesa_format format)
  96 {
  97    const struct mesa_format_info *info = _mesa_get_format_info(format);
  98    return info->StrName;
  99 }
 100
 101
 102
 103 /**
 104  * Return bytes needed to store a block of pixels in the given format.
 105  * Normally, a block is 1x1 (a single pixel).  But for compressed formats
 106  * a block may be 4x4 or 8x4, etc.
 107  *
 108  * Note: return is signed, so as not to coerce math to unsigned. cf. fdo #37351
 109  */
 110 int
 111 _mesa_get_format_bytes(mesa_format format)
 112 {
 113    if (_mesa_format_is_mesa_array_format(format)) {
 114       return _mesa_array_format_get_type_size(format) *
 115              _mesa_array_format_get_num_channels(format);
 116    }
 117
 118    const struct mesa_format_info *info = _mesa_get_format_info(format);
 119    assert(info->BytesPerBlock);
 120    assert(info->BytesPerBlock <= MAX_PIXEL_BYTES ||
 121           _mesa_is_format_compressed(format));
 122    return info->BytesPerBlock;
 123 }
 124
 125
 126 /**
 127  * Return bits per component for the given format.
 128  * \param format  one of MESA_FORMAT_x
 129  * \param pname  the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
 130  */
 131 GLint
 132 _mesa_get_format_bits(mesa_format format, GLenum pname)
 133 {
 134    const struct mesa_format_info *info = _mesa_get_format_info(format);
 135
 136    switch (pname) {
 137    case GL_RED_BITS:
 138    case GL_TEXTURE_RED_SIZE:
 139    case GL_RENDERBUFFER_RED_SIZE_EXT:
 140    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
 141    case GL_INTERNALFORMAT_RED_SIZE:
 142       return info->RedBits;
 143    case GL_GREEN_BITS:
 144    case GL_TEXTURE_GREEN_SIZE:
 145    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
 146    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
 147    case GL_INTERNALFORMAT_GREEN_SIZE:
 148       return info->GreenBits;
 149    case GL_BLUE_BITS:
 150    case GL_TEXTURE_BLUE_SIZE:
 151    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
 152    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
 153    case GL_INTERNALFORMAT_BLUE_SIZE:
 154       return info->BlueBits;
 155    case GL_ALPHA_BITS:
 156    case GL_TEXTURE_ALPHA_SIZE:
 157    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
 158    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
 159    case GL_INTERNALFORMAT_ALPHA_SIZE:
 160       return info->AlphaBits;
 161    case GL_TEXTURE_INTENSITY_SIZE:
 162       return info->IntensityBits;
 163    case GL_TEXTURE_LUMINANCE_SIZE:
 164       return info->LuminanceBits;
 165    case GL_INDEX_BITS:
 166       return 0;
 167    case GL_DEPTH_BITS:
 168    case GL_TEXTURE_DEPTH_SIZE_ARB:
 169    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
 170    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
 171    case GL_INTERNALFORMAT_DEPTH_SIZE:
 172       return info->DepthBits;
 173    case GL_STENCIL_BITS:
 174    case GL_TEXTURE_STENCIL_SIZE_EXT:
 175    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
 176    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
 177    case GL_INTERNALFORMAT_STENCIL_SIZE:
 178       return info->StencilBits;
 179    default:
 180       _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
 181       return 0;
 182    }
 183 }
 184
 185
 186 unsigned int
 187 _mesa_get_format_max_bits(mesa_format format)
 188 {
 189    const struct mesa_format_info *info = _mesa_get_format_info(format);
 190    unsigned int max = MAX2(info->RedBits, info->GreenBits);
 191    max = MAX2(max, info->BlueBits);
 192    max = MAX2(max, info->AlphaBits);
 193    max = MAX2(max, info->LuminanceBits);
 194    max = MAX2(max, info->IntensityBits);
 195    max = MAX2(max, info->DepthBits);
 196    max = MAX2(max, info->StencilBits);
 197    return max;
 198 }
 199
 200
 201 /**
 202  * Return the layout type of the given format.
 203  */
 204 extern enum mesa_format_layout
 205 _mesa_get_format_layout(mesa_format format)
 206 {
 207    const struct mesa_format_info *info = _mesa_get_format_info(format);
 208    return info->Layout;
 209 }
 210
 211
 212 /**
 213  * Return the data type (or more specifically, the data representation)
 214  * for the given format.
 215  * The return value will be one of:
 216  *    GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
 217  *    GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
 218  *    GL_UNSIGNED_INT = an ordinary unsigned integer
 219  *    GL_INT = an ordinary signed integer
 220  *    GL_FLOAT = an ordinary float
 221  */
 222 GLenum
 223 _mesa_get_format_datatype(mesa_format format)
 224 {
 225    const struct mesa_format_info *info = _mesa_get_format_info(format);
 226    return info->DataType;
 227 }
 228
 229 static GLenum
 230 get_base_format_for_array_format(mesa_array_format format)
 231 {
 232    uint8_t swizzle[4];
 233    int num_channels;
 234
 235    _mesa_array_format_get_swizzle(format, swizzle);
 236    num_channels = _mesa_array_format_get_num_channels(format);
 237
 238    switch (num_channels) {
 239    case 4:
 240       /* FIXME: RGBX formats have 4 channels, but their base format is GL_RGB.
 241        * This is not really a problem for now because we only create array
 242        * formats from GL format/type combinations, and these cannot specify
 243        * RGBX formats.
 244        */
 245       return GL_RGBA;
 246    case 3:
 247       return GL_RGB;
 248    case 2:
 249       if (swizzle[0] == 0 &&
 250           swizzle[1] == 0 &&
 251           swizzle[2] == 0 &&
 252           swizzle[3] == 1)
 253          return GL_LUMINANCE_ALPHA;
 254       if (swizzle[0] == 1 &&
 255           swizzle[1] == 1 &&
 256           swizzle[2] == 1 &&
 257           swizzle[3] == 0)
 258          return GL_LUMINANCE_ALPHA;
 259       if (swizzle[0] == 0 &&
 260           swizzle[1] == 1 &&
 261           swizzle[2] == 4 &&
 262           swizzle[3] == 5)
 263          return GL_RG;
 264       if (swizzle[0] == 1 &&
 265           swizzle[1] == 0 &&
 266           swizzle[2] == 4 &&
 267           swizzle[3] == 5)
 268          return GL_RG;
 269       break;
 270    case 1:
 271       if (swizzle[0] == 0 &&
 272           swizzle[1] == 0 &&
 273           swizzle[2] == 0 &&
 274           swizzle[3] == 5)
 275          return GL_LUMINANCE;
 276       if (swizzle[0] == 0 &&
 277           swizzle[1] == 0 &&
 278           swizzle[2] == 0 &&
 279           swizzle[3] == 0)
 280          return GL_INTENSITY;
 281       if (swizzle[0] <= MESA_FORMAT_SWIZZLE_W)
 282          return GL_RED;
 283       if (swizzle[1] <= MESA_FORMAT_SWIZZLE_W)
 284          return GL_GREEN;
 285       if (swizzle[2] <= MESA_FORMAT_SWIZZLE_W)
 286          return GL_BLUE;
 287       if (swizzle[3] <= MESA_FORMAT_SWIZZLE_W)
 288          return GL_ALPHA;
 289       break;
 290    }
 291
 292    unreachable("Unsupported format");
 293 }
 294
 295 /**
 296  * Return the basic format for the given type.  The result will be one of
 297  * GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
 298  * GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
 299  * This functions accepts a mesa_format or a mesa_array_format.
 300  */
 301 GLenum
 302 _mesa_get_format_base_format(uint32_t format)
 303 {
 304    if (!_mesa_format_is_mesa_array_format(format)) {
 305       const struct mesa_format_info *info = _mesa_get_format_info(format);
 306       return info->BaseFormat;
 307    } else {
 308       return get_base_format_for_array_format(format);
 309    }
 310 }
 311
 312
 313 /**
 314  * Return the block size (in pixels) for the given format.  Normally
 315  * the block size is 1x1.  But compressed formats will have block sizes
 316  * of 4x4 or 8x4 pixels, etc.
 317  * \param bw  returns block width in pixels
 318  * \param bh  returns block height in pixels
 319  */
 320 void
 321 _mesa_get_format_block_size(mesa_format format,
 322                             unsigned int *bw, unsigned int *bh)
 323 {
 324    const struct mesa_format_info *info = _mesa_get_format_info(format);
 325    /* Use _mesa_get_format_block_size_3d() for 3D blocks. */
 326    assert(info->BlockDepth == 1);
 327
 328    *bw = info->BlockWidth;
 329    *bh = info->BlockHeight;
 330 }
 331
 332
 333 /**
 334  * Return the block size (in pixels) for the given format. Normally
 335  * the block size is 1x1x1. But compressed formats will have block
 336  * sizes of 4x4x4, 3x3x3 pixels, etc.
 337  * \param bw  returns block width in pixels
 338  * \param bh  returns block height in pixels
 339  * \param bd  returns block depth in pixels
 340  */
 341 void
 342 _mesa_get_format_block_size_3d(mesa_format format,
 343                                unsigned int *bw,
 344                                unsigned int *bh,
 345                                unsigned int *bd)
 346 {
 347    const struct mesa_format_info *info = _mesa_get_format_info(format);
 348    *bw = info->BlockWidth;
 349    *bh = info->BlockHeight;
 350    *bd = info->BlockDepth;
 351 }
 352
 353
 354 /**
 355  * Returns the an array of four numbers representing the transformation
 356  * from the RGBA or SZ colorspace to the given format.  For array formats,
 357  * the i'th RGBA component is given by:
 358  *
 359  * if (swizzle[i] <= MESA_FORMAT_SWIZZLE_W)
 360  *    comp = data[swizzle[i]];
 361  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ZERO)
 362  *    comp = 0;
 363  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ONE)
 364  *    comp = 1;
 365  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_NONE)
 366  *    // data does not contain a channel of this format
 367  *
 368  * For packed formats, the swizzle gives the number of components left of
 369  * the least significant bit.
 370  *
 371  * Compressed formats have no swizzle.
 372  */
 373 void
 374 _mesa_get_format_swizzle(mesa_format format, uint8_t swizzle_out[4])
 375 {
 376    const struct mesa_format_info *info = _mesa_get_format_info(format);
 377    memcpy(swizzle_out, info->Swizzle, sizeof(info->Swizzle));
 378 }
 379
 380 mesa_array_format
 381 _mesa_array_format_flip_channels(mesa_array_format format)
 382 {
 383    int num_channels;
 384    uint8_t swizzle[4];
 385
 386    num_channels = _mesa_array_format_get_num_channels(format);
 387    _mesa_array_format_get_swizzle(format, swizzle);
 388
 389    if (num_channels == 1)
 390       return format;
 391
 392    if (num_channels == 2) {
 393       /* Assert that the swizzle makes sense for 2 channels */
 394       for (unsigned i = 0; i < 4; i++)
 395          assert(swizzle[i] != 2 && swizzle[i] != 3);
 396
 397       static const uint8_t flip_xy[6] = { 1, 0, 2, 3, 4, 5 };
 398       _mesa_array_format_set_swizzle(&format,
 399                                      flip_xy[swizzle[0]], flip_xy[swizzle[1]],
 400                                      flip_xy[swizzle[2]], flip_xy[swizzle[3]]);
 401       return format;
 402    }
 403
 404    if (num_channels == 4) {
 405       static const uint8_t flip[6] = { 3, 2, 1, 0, 4, 5 };
 406       _mesa_array_format_set_swizzle(&format,
 407                                      flip[swizzle[0]], flip[swizzle[1]],
 408                                      flip[swizzle[2]], flip[swizzle[3]]);
 409       return format;
 410    }
 411
 412    unreachable("Invalid array format");
 413 }
 414
 415 uint32_t
 416 _mesa_format_to_array_format(mesa_format format)
 417 {
 418    const struct mesa_format_info *info = _mesa_get_format_info(format);
 419    if (info->ArrayFormat && !_mesa_little_endian() &&
 420        info->Layout == MESA_FORMAT_LAYOUT_PACKED)
 421       return _mesa_array_format_flip_channels(info->ArrayFormat);
 422    else
 423       return info->ArrayFormat;
 424 }
 425
 426 static struct hash_table *format_array_format_table;
 427 static once_flag format_array_format_table_exists = ONCE_FLAG_INIT;
 428
 429 static void
 430 format_array_format_table_destroy(void)
 431 {
 432    _mesa_hash_table_destroy(format_array_format_table, NULL);
 433 }
 434
 435 static bool
 436 array_formats_equal(const void *a, const void *b)
 437 {
 438    return (intptr_t)a == (intptr_t)b;
 439 }
 440
 441 static void
 442 format_array_format_table_init(void)
 443 {
 444    const struct mesa_format_info *info;
 445    mesa_array_format array_format;
 446    unsigned f;
 447
 448    format_array_format_table = _mesa_hash_table_create(NULL, NULL,
 449                                                        array_formats_equal);
 450
 451    if (!format_array_format_table) {
 452       _mesa_error_no_memory(__func__);
 453       return;
 454    }
 455
 456    for (f = 1; f < MESA_FORMAT_COUNT; ++f) {
 457       info = _mesa_get_format_info(f);
 458       if (!info->ArrayFormat)
 459          continue;
 460
 461       if (_mesa_little_endian()) {
 462          array_format = info->ArrayFormat;
 463       } else {
 464          array_format = _mesa_array_format_flip_channels(info->ArrayFormat);
 465       }
 466
 467       /* This can happen and does for some of the BGR formats.  Let's take
 468        * the first one in the list.
 469        */
 470       if (_mesa_hash_table_search_pre_hashed(format_array_format_table,
 471                                              array_format,
 472                                              (void *)(intptr_t)array_format))
 473          continue;
 474
 475       _mesa_hash_table_insert_pre_hashed(format_array_format_table,
 476                                          array_format,
 477                                          (void *)(intptr_t)array_format,
 478                                          (void *)(intptr_t)f);
 479    }
 480
 481    atexit(format_array_format_table_destroy);
 482 }
 483
 484 mesa_format
 485 _mesa_format_from_array_format(uint32_t array_format)
 486 {
 487    struct hash_entry *entry;
 488
 489    assert(_mesa_format_is_mesa_array_format(array_format));
 490
 491    call_once(&format_array_format_table_exists, format_array_format_table_init);
 492
 493    if (!format_array_format_table) {
 494       static const once_flag once_flag_init = ONCE_FLAG_INIT;
 495       format_array_format_table_exists = once_flag_init;
 496       return MESA_FORMAT_NONE;
 497    }
 498
 499    entry = _mesa_hash_table_search_pre_hashed(format_array_format_table,
 500                                               array_format,
 501                                               (void *)(intptr_t)array_format);
 502    if (entry)
 503       return (intptr_t)entry->data;
 504    else
 505       return MESA_FORMAT_NONE;
 506 }
 507
 508 /** Is the given format a compressed format? */
 509 bool
 510 _mesa_is_format_compressed(mesa_format format)
 511 {
 512    const struct mesa_format_info *info = _mesa_get_format_info(format);
 513    return info->BlockWidth > 1 || info->BlockHeight > 1;
 514 }
 515
 516
 517 /**
 518  * Determine if the given format represents a packed depth/stencil buffer.
 519  */
 520 bool
 521 _mesa_is_format_packed_depth_stencil(mesa_format format)
 522 {
 523    const struct mesa_format_info *info = _mesa_get_format_info(format);
 524
 525    return info->BaseFormat == GL_DEPTH_STENCIL;
 526 }
 527
 528
 529 /**
 530  * Is the given format a signed/unsigned integer color format?
 531  */
 532 bool
 533 _mesa_is_format_integer_color(mesa_format format)
 534 {
 535    const struct mesa_format_info *info = _mesa_get_format_info(format);
 536    return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
 537       info->BaseFormat != GL_DEPTH_COMPONENT &&
 538       info->BaseFormat != GL_DEPTH_STENCIL &&
 539       info->BaseFormat != GL_STENCIL_INDEX;
 540 }
 541
 542
 543 /**
 544  * Is the given format an unsigned integer format?
 545  */
 546 bool
 547 _mesa_is_format_unsigned(mesa_format format)
 548 {
 549    const struct mesa_format_info *info = _mesa_get_format_info(format);
 550    return _mesa_is_type_unsigned(info->DataType);
 551 }
 552
 553
 554 /**
 555  * Does the given format store signed values?
 556  */
 557 bool
 558 _mesa_is_format_signed(mesa_format format)
 559 {
 560    if (format == MESA_FORMAT_R11G11B10_FLOAT ||
 561        format == MESA_FORMAT_R9G9B9E5_FLOAT) {
 562       /* these packed float formats only store unsigned values */
 563       return false;
 564    }
 565    else {
 566       const struct mesa_format_info *info = _mesa_get_format_info(format);
 567       return (info->DataType == GL_SIGNED_NORMALIZED ||
 568               info->DataType == GL_INT ||
 569               info->DataType == GL_FLOAT);
 570    }
 571 }
 572
 573 /**
 574  * Is the given format an integer format?
 575  */
 576 bool
 577 _mesa_is_format_integer(mesa_format format)
 578 {
 579    const struct mesa_format_info *info = _mesa_get_format_info(format);
 580    return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT);
 581 }
 582
 583
 584 /**
 585  * Return true if the given format is a color format.
 586  */
 587 bool
 588 _mesa_is_format_color_format(mesa_format format)
 589 {
 590    const struct mesa_format_info *info = _mesa_get_format_info(format);
 591    switch (info->BaseFormat) {
 592    case GL_DEPTH_COMPONENT:
 593    case GL_STENCIL_INDEX:
 594    case GL_DEPTH_STENCIL:
 595       return false;
 596    default:
 597       return true;
 598    }
 599 }
 600
 601 bool
 602 _mesa_is_format_srgb(mesa_format format)
 603 {
 604    const struct mesa_format_info *info = _mesa_get_format_info(format);
 605    return info->IsSRGBFormat;
 606 }
 607
 608 /**
 609  * Return TRUE if format is an ETC2 compressed format specified
 610  * by GL_ARB_ES3_compatibility.
 611  */
 612 bool
 613 _mesa_is_format_etc2(mesa_format format)
 614 {
 615    switch (format) {
 616    case MESA_FORMAT_ETC2_RGB8:
 617    case MESA_FORMAT_ETC2_SRGB8:
 618    case MESA_FORMAT_ETC2_RGBA8_EAC:
 619    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 620    case MESA_FORMAT_ETC2_R11_EAC:
 621    case MESA_FORMAT_ETC2_RG11_EAC:
 622    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 623    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 624    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 625    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 626       return true;
 627    default:
 628       return false;
 629    }
 630 }
 631
 632
 633 /**
 634  * Return TRUE if format is an ASTC 2D compressed format.
 635  */
 636 bool
 637 _mesa_is_format_astc_2d(mesa_format format)
 638 {
 639    switch (format) {
 640    case MESA_FORMAT_RGBA_ASTC_4x4:
 641    case MESA_FORMAT_RGBA_ASTC_5x4:
 642    case MESA_FORMAT_RGBA_ASTC_5x5:
 643    case MESA_FORMAT_RGBA_ASTC_6x5:
 644    case MESA_FORMAT_RGBA_ASTC_6x6:
 645    case MESA_FORMAT_RGBA_ASTC_8x5:
 646    case MESA_FORMAT_RGBA_ASTC_8x6:
 647    case MESA_FORMAT_RGBA_ASTC_8x8:
 648    case MESA_FORMAT_RGBA_ASTC_10x5:
 649    case MESA_FORMAT_RGBA_ASTC_10x6:
 650    case MESA_FORMAT_RGBA_ASTC_10x8:
 651    case MESA_FORMAT_RGBA_ASTC_10x10:
 652    case MESA_FORMAT_RGBA_ASTC_12x10:
 653    case MESA_FORMAT_RGBA_ASTC_12x12:
 654    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4:
 655    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4:
 656    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5:
 657    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5:
 658    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6:
 659    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x5:
 660    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x6:
 661    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x8:
 662    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x5:
 663    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x6:
 664    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x8:
 665    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x10:
 666    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x10:
 667    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x12:
 668       return true;
 669    default:
 670       return false;
 671    }
 672 }
 673
 674
 675 /**
 676  * If the given format is a compressed format, return a corresponding
 677  * uncompressed format.
 678  */
 679 mesa_format
 680 _mesa_get_uncompressed_format(mesa_format format)
 681 {
 682    switch (format) {
 683    case MESA_FORMAT_RGB_FXT1:
 684       return MESA_FORMAT_BGR_UNORM8;
 685    case MESA_FORMAT_RGBA_FXT1:
 686       return MESA_FORMAT_A8B8G8R8_UNORM;
 687    case MESA_FORMAT_RGB_DXT1:
 688    case MESA_FORMAT_SRGB_DXT1:
 689       return MESA_FORMAT_BGR_UNORM8;
 690    case MESA_FORMAT_RGBA_DXT1:
 691    case MESA_FORMAT_SRGBA_DXT1:
 692       return MESA_FORMAT_A8B8G8R8_UNORM;
 693    case MESA_FORMAT_RGBA_DXT3:
 694    case MESA_FORMAT_SRGBA_DXT3:
 695       return MESA_FORMAT_A8B8G8R8_UNORM;
 696    case MESA_FORMAT_RGBA_DXT5:
 697    case MESA_FORMAT_SRGBA_DXT5:
 698       return MESA_FORMAT_A8B8G8R8_UNORM;
 699    case MESA_FORMAT_R_RGTC1_UNORM:
 700       return MESA_FORMAT_R_UNORM8;
 701    case MESA_FORMAT_R_RGTC1_SNORM:
 702       return MESA_FORMAT_R_SNORM8;
 703    case MESA_FORMAT_RG_RGTC2_UNORM:
 704       return MESA_FORMAT_R8G8_UNORM;
 705    case MESA_FORMAT_RG_RGTC2_SNORM:
 706       return MESA_FORMAT_R8G8_SNORM;
 707    case MESA_FORMAT_L_LATC1_UNORM:
 708       return MESA_FORMAT_L_UNORM8;
 709    case MESA_FORMAT_L_LATC1_SNORM:
 710       return MESA_FORMAT_L_SNORM8;
 711    case MESA_FORMAT_LA_LATC2_UNORM:
 712       return MESA_FORMAT_L8A8_UNORM;
 713    case MESA_FORMAT_LA_LATC2_SNORM:
 714       return MESA_FORMAT_L8A8_SNORM;
 715    case MESA_FORMAT_ETC1_RGB8:
 716    case MESA_FORMAT_ETC2_RGB8:
 717    case MESA_FORMAT_ETC2_SRGB8:
 718    case MESA_FORMAT_ATC_RGB:
 719       return MESA_FORMAT_BGR_UNORM8;
 720    case MESA_FORMAT_ETC2_RGBA8_EAC:
 721    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 722    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 723    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 724    case MESA_FORMAT_ATC_RGBA_EXPLICIT:
 725    case MESA_FORMAT_ATC_RGBA_INTERPOLATED:
 726       return MESA_FORMAT_A8B8G8R8_UNORM;
 727    case MESA_FORMAT_ETC2_R11_EAC:
 728    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 729       return MESA_FORMAT_R_UNORM16;
 730    case MESA_FORMAT_ETC2_RG11_EAC:
 731    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 732       return MESA_FORMAT_R16G16_UNORM;
 733    case MESA_FORMAT_BPTC_RGBA_UNORM:
 734    case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
 735       return MESA_FORMAT_A8B8G8R8_UNORM;
 736    case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
 737    case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
 738       return MESA_FORMAT_RGB_FLOAT32;
 739    default:
 740       assert(!_mesa_is_format_compressed(format));
 741       return format;
 742    }
 743 }
 744
 745
 746 unsigned int
 747 _mesa_format_num_components(mesa_format format)
 748 {
 749    const struct mesa_format_info *info = _mesa_get_format_info(format);
 750    return ((info->RedBits > 0) +
 751            (info->GreenBits > 0) +
 752            (info->BlueBits > 0) +
 753            (info->AlphaBits > 0) +
 754            (info->LuminanceBits > 0) +
 755            (info->IntensityBits > 0) +
 756            (info->DepthBits > 0) +
 757            (info->StencilBits > 0));
 758 }
 759
 760
 761 /**
 762  * Returns true if a color format has data stored in the R/G/B/A channels,
 763  * given an index from 0 to 3.
 764  */
 765 bool
 766 _mesa_format_has_color_component(mesa_format format, int component)
 767 {
 768    const struct mesa_format_info *info = _mesa_get_format_info(format);
 769
 770    assert(info->BaseFormat != GL_DEPTH_COMPONENT &&
 771           info->BaseFormat != GL_DEPTH_STENCIL &&
 772           info->BaseFormat != GL_STENCIL_INDEX);
 773
 774    switch (component) {
 775    case 0:
 776       return (info->RedBits + info->IntensityBits + info->LuminanceBits) > 0;
 777    case 1:
 778       return (info->GreenBits + info->IntensityBits + info->LuminanceBits) > 0;
 779    case 2:
 780       return (info->BlueBits + info->IntensityBits + info->LuminanceBits) > 0;
 781    case 3:
 782       return (info->AlphaBits + info->IntensityBits) > 0;
 783    default:
 784       assert(!"Invalid color component: must be 0..3");
 785       return false;
 786    }
 787 }
 788
 789
 790 /**
 791  * Return number of bytes needed to store an image of the given size
 792  * in the given format.
 793  */
 794 uint32_t
 795 _mesa_format_image_size(mesa_format format, int width,
 796                         int height, int depth)
 797 {
 798    const struct mesa_format_info *info = _mesa_get_format_info(format);
 799    uint32_t sz;
 800    /* Strictly speaking, a conditional isn't needed here */
 801    if (info->BlockWidth > 1 || info->BlockHeight > 1 || info->BlockDepth > 1) {
 802       /* compressed format (2D only for now) */
 803       const uint32_t bw = info->BlockWidth;
 804       const uint32_t bh = info->BlockHeight;
 805       const uint32_t bd = info->BlockDepth;
 806       const uint32_t wblocks = (width + bw - 1) / bw;
 807       const uint32_t hblocks = (height + bh - 1) / bh;
 808       const uint32_t dblocks = (depth + bd - 1) / bd;
 809       sz = wblocks * hblocks * dblocks * info->BytesPerBlock;
 810    } else
 811       /* non-compressed */
 812       sz = width * height * depth * info->BytesPerBlock;
 813
 814    return sz;
 815 }
 816
 817
 818 /**
 819  * Same as _mesa_format_image_size() but returns a 64-bit value to
 820  * accommodate very large textures.
 821  */
 822 uint64_t
 823 _mesa_format_image_size64(mesa_format format, int width,
 824                           int height, int depth)
 825 {
 826    const struct mesa_format_info *info = _mesa_get_format_info(format);
 827    uint64_t sz;
 828    /* Strictly speaking, a conditional isn't needed here */
 829    if (info->BlockWidth > 1 || info->BlockHeight > 1 || info->BlockDepth > 1) {
 830       /* compressed format (2D only for now) */
 831       const uint64_t bw = info->BlockWidth;
 832       const uint64_t bh = info->BlockHeight;
 833       const uint64_t bd = info->BlockDepth;
 834       const uint64_t wblocks = (width + bw - 1) / bw;
 835       const uint64_t hblocks = (height + bh - 1) / bh;
 836       const uint64_t dblocks = (depth + bd - 1) / bd;
 837       sz = wblocks * hblocks * dblocks * info->BytesPerBlock;
 838    } else
 839       /* non-compressed */
 840       sz = ((uint64_t) width * (uint64_t) height *
 841             (uint64_t) depth * info->BytesPerBlock);
 842
 843    return sz;
 844 }
 845
 846
 847
 848 int32_t
 849 _mesa_format_row_stride(mesa_format format, int width)
 850 {
 851    const struct mesa_format_info *info = _mesa_get_format_info(format);
 852    /* Strictly speaking, a conditional isn't needed here */
 853    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 854       /* compressed format */
 855       const uint32_t bw = info->BlockWidth;
 856       const uint32_t wblocks = (width + bw - 1) / bw;
 857       const int32_t stride = wblocks * info->BytesPerBlock;
 858       return stride;
 859    }
 860    else {
 861       const int32_t stride = width * info->BytesPerBlock;
 862       return stride;
 863    }
 864 }
 865
 866
 867
 868 /**
 869  * Return datatype and number of components per texel for the given
 870  * uncompressed mesa_format. Only used for mipmap generation code.
 871  */
 872 void
 873 _mesa_uncompressed_format_to_type_and_comps(mesa_format format,
 874                                GLenum *datatype, GLuint *comps)
 875 {
 876    switch (format) {
 877    case MESA_FORMAT_A8B8G8R8_UNORM:
 878    case MESA_FORMAT_R8G8B8A8_UNORM:
 879    case MESA_FORMAT_B8G8R8A8_UNORM:
 880    case MESA_FORMAT_A8R8G8B8_UNORM:
 881    case MESA_FORMAT_X8B8G8R8_UNORM:
 882    case MESA_FORMAT_R8G8B8X8_UNORM:
 883    case MESA_FORMAT_B8G8R8X8_UNORM:
 884    case MESA_FORMAT_X8R8G8B8_UNORM:
 885    case MESA_FORMAT_A8B8G8R8_UINT:
 886    case MESA_FORMAT_R8G8B8A8_UINT:
 887    case MESA_FORMAT_B8G8R8A8_UINT:
 888    case MESA_FORMAT_A8R8G8B8_UINT:
 889       *datatype = GL_UNSIGNED_BYTE;
 890       *comps = 4;
 891       return;
 892    case MESA_FORMAT_BGR_UNORM8:
 893    case MESA_FORMAT_RGB_UNORM8:
 894       *datatype = GL_UNSIGNED_BYTE;
 895       *comps = 3;
 896       return;
 897    case MESA_FORMAT_B5G6R5_UNORM:
 898    case MESA_FORMAT_R5G6B5_UNORM:
 899    case MESA_FORMAT_B5G6R5_UINT:
 900    case MESA_FORMAT_R5G6B5_UINT:
 901       *datatype = GL_UNSIGNED_SHORT_5_6_5;
 902       *comps = 3;
 903       return;
 904
 905    case MESA_FORMAT_B4G4R4A4_UNORM:
 906    case MESA_FORMAT_A4R4G4B4_UNORM:
 907    case MESA_FORMAT_B4G4R4X4_UNORM:
 908    case MESA_FORMAT_B4G4R4A4_UINT:
 909    case MESA_FORMAT_A4R4G4B4_UINT:
 910       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 911       *comps = 4;
 912       return;
 913
 914    case MESA_FORMAT_B5G5R5A1_UNORM:
 915    case MESA_FORMAT_A1R5G5B5_UNORM:
 916    case MESA_FORMAT_B5G5R5X1_UNORM:
 917    case MESA_FORMAT_B5G5R5A1_UINT:
 918    case MESA_FORMAT_A1R5G5B5_UINT:
 919       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 920       *comps = 4;
 921       return;
 922
 923    case MESA_FORMAT_B10G10R10A2_UNORM:
 924       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
 925       *comps = 4;
 926       return;
 927
 928    case MESA_FORMAT_A1B5G5R5_UNORM:
 929    case MESA_FORMAT_A1B5G5R5_UINT:
 930    case MESA_FORMAT_X1B5G5R5_UNORM:
 931       *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
 932       *comps = 4;
 933       return;
 934
 935    case MESA_FORMAT_L4A4_UNORM:
 936       *datatype = MESA_UNSIGNED_BYTE_4_4;
 937       *comps = 2;
 938       return;
 939
 940    case MESA_FORMAT_L8A8_UNORM:
 941    case MESA_FORMAT_A8L8_UNORM:
 942    case MESA_FORMAT_R8G8_UNORM:
 943    case MESA_FORMAT_G8R8_UNORM:
 944       *datatype = GL_UNSIGNED_BYTE;
 945       *comps = 2;
 946       return;
 947
 948    case MESA_FORMAT_L16A16_UNORM:
 949    case MESA_FORMAT_A16L16_UNORM:
 950    case MESA_FORMAT_R16G16_UNORM:
 951    case MESA_FORMAT_G16R16_UNORM:
 952       *datatype = GL_UNSIGNED_SHORT;
 953       *comps = 2;
 954       return;
 955
 956    case MESA_FORMAT_R_UNORM16:
 957    case MESA_FORMAT_A_UNORM16:
 958    case MESA_FORMAT_L_UNORM16:
 959    case MESA_FORMAT_I_UNORM16:
 960       *datatype = GL_UNSIGNED_SHORT;
 961       *comps = 1;
 962       return;
 963
 964    case MESA_FORMAT_R3G3B2_UNORM:
 965    case MESA_FORMAT_R3G3B2_UINT:
 966       *datatype = GL_UNSIGNED_BYTE_2_3_3_REV;
 967       *comps = 3;
 968       return;
 969    case MESA_FORMAT_A4B4G4R4_UNORM:
 970    case MESA_FORMAT_A4B4G4R4_UINT:
 971       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 972       *comps = 4;
 973       return;
 974
 975    case MESA_FORMAT_R4G4B4A4_UNORM:
 976    case MESA_FORMAT_R4G4B4A4_UINT:
 977       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 978       *comps = 4;
 979       return;
 980    case MESA_FORMAT_R5G5B5A1_UNORM:
 981    case MESA_FORMAT_R5G5B5A1_UINT:
 982       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 983       *comps = 4;
 984       return;
 985    case MESA_FORMAT_A2B10G10R10_UNORM:
 986    case MESA_FORMAT_A2B10G10R10_UINT:
 987       *datatype = GL_UNSIGNED_INT_10_10_10_2;
 988       *comps = 4;
 989       return;
 990    case MESA_FORMAT_A2R10G10B10_UNORM:
 991    case MESA_FORMAT_A2R10G10B10_UINT:
 992       *datatype = GL_UNSIGNED_INT_10_10_10_2;
 993       *comps = 4;
 994       return;
 995
 996    case MESA_FORMAT_B2G3R3_UNORM:
 997    case MESA_FORMAT_B2G3R3_UINT:
 998       *datatype = GL_UNSIGNED_BYTE_3_3_2;
 999       *comps = 3;
1000       return;
1001
1002    case MESA_FORMAT_A_UNORM8:
1003    case MESA_FORMAT_L_UNORM8:
1004    case MESA_FORMAT_I_UNORM8:
1005    case MESA_FORMAT_R_UNORM8:
1006    case MESA_FORMAT_S_UINT8:
1007       *datatype = GL_UNSIGNED_BYTE;
1008       *comps = 1;
1009       return;
1010
1011    case MESA_FORMAT_YCBCR:
1012    case MESA_FORMAT_YCBCR_REV:
1013       *datatype = GL_UNSIGNED_SHORT;
1014       *comps = 2;
1015       return;
1016
1017    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1018       *datatype = GL_UNSIGNED_INT_24_8_MESA;
1019       *comps = 2;
1020       return;
1021
1022    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1023       *datatype = GL_UNSIGNED_INT_8_24_REV_MESA;
1024       *comps = 2;
1025       return;
1026
1027    case MESA_FORMAT_Z_UNORM16:
1028       *datatype = GL_UNSIGNED_SHORT;
1029       *comps = 1;
1030       return;
1031
1032    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1033       *datatype = GL_UNSIGNED_INT;
1034       *comps = 1;
1035       return;
1036
1037    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1038       *datatype = GL_UNSIGNED_INT;
1039       *comps = 1;
1040       return;
1041
1042    case MESA_FORMAT_Z_UNORM32:
1043       *datatype = GL_UNSIGNED_INT;
1044       *comps = 1;
1045       return;
1046
1047    case MESA_FORMAT_Z_FLOAT32:
1048       *datatype = GL_FLOAT;
1049       *comps = 1;
1050       return;
1051
1052    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
1053       *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
1054       *comps = 1;
1055       return;
1056
1057    case MESA_FORMAT_R_SNORM8:
1058    case MESA_FORMAT_A_SNORM8:
1059    case MESA_FORMAT_L_SNORM8:
1060    case MESA_FORMAT_I_SNORM8:
1061       *datatype = GL_BYTE;
1062       *comps = 1;
1063       return;
1064    case MESA_FORMAT_R8G8_SNORM:
1065    case MESA_FORMAT_L8A8_SNORM:
1066    case MESA_FORMAT_A8L8_SNORM:
1067       *datatype = GL_BYTE;
1068       *comps = 2;
1069       return;
1070    case MESA_FORMAT_A8B8G8R8_SNORM:
1071    case MESA_FORMAT_R8G8B8A8_SNORM:
1072    case MESA_FORMAT_X8B8G8R8_SNORM:
1073       *datatype = GL_BYTE;
1074       *comps = 4;
1075       return;
1076
1077    case MESA_FORMAT_RGBA_UNORM16:
1078       *datatype = GL_UNSIGNED_SHORT;
1079       *comps = 4;
1080       return;
1081
1082    case MESA_FORMAT_R_SNORM16:
1083    case MESA_FORMAT_A_SNORM16:
1084    case MESA_FORMAT_L_SNORM16:
1085    case MESA_FORMAT_I_SNORM16:
1086       *datatype = GL_SHORT;
1087       *comps = 1;
1088       return;
1089    case MESA_FORMAT_R16G16_SNORM:
1090    case MESA_FORMAT_LA_SNORM16:
1091       *datatype = GL_SHORT;
1092       *comps = 2;
1093       return;
1094    case MESA_FORMAT_RGB_SNORM16:
1095       *datatype = GL_SHORT;
1096       *comps = 3;
1097       return;
1098    case MESA_FORMAT_RGBA_SNORM16:
1099       *datatype = GL_SHORT;
1100       *comps = 4;
1101       return;
1102
1103    case MESA_FORMAT_BGR_SRGB8:
1104       *datatype = GL_UNSIGNED_BYTE;
1105       *comps = 3;
1106       return;
1107    case MESA_FORMAT_A8B8G8R8_SRGB:
1108    case MESA_FORMAT_B8G8R8A8_SRGB:
1109    case MESA_FORMAT_A8R8G8B8_SRGB:
1110    case MESA_FORMAT_R8G8B8A8_SRGB:
1111       *datatype = GL_UNSIGNED_BYTE;
1112       *comps = 4;
1113       return;
1114    case MESA_FORMAT_L_SRGB8:
1115    case MESA_FORMAT_R_SRGB8:
1116       *datatype = GL_UNSIGNED_BYTE;
1117       *comps = 1;
1118       return;
1119    case MESA_FORMAT_L8A8_SRGB:
1120    case MESA_FORMAT_A8L8_SRGB:
1121       *datatype = GL_UNSIGNED_BYTE;
1122       *comps = 2;
1123       return;
1124
1125    case MESA_FORMAT_RGBA_FLOAT32:
1126       *datatype = GL_FLOAT;
1127       *comps = 4;
1128       return;
1129    case MESA_FORMAT_RGBA_FLOAT16:
1130       *datatype = GL_HALF_FLOAT_ARB;
1131       *comps = 4;
1132       return;
1133    case MESA_FORMAT_RGB_FLOAT32:
1134       *datatype = GL_FLOAT;
1135       *comps = 3;
1136       return;
1137    case MESA_FORMAT_RGB_FLOAT16:
1138       *datatype = GL_HALF_FLOAT_ARB;
1139       *comps = 3;
1140       return;
1141    case MESA_FORMAT_LA_FLOAT32:
1142    case MESA_FORMAT_RG_FLOAT32:
1143       *datatype = GL_FLOAT;
1144       *comps = 2;
1145       return;
1146    case MESA_FORMAT_LA_FLOAT16:
1147    case MESA_FORMAT_RG_FLOAT16:
1148       *datatype = GL_HALF_FLOAT_ARB;
1149       *comps = 2;
1150       return;
1151    case MESA_FORMAT_A_FLOAT32:
1152    case MESA_FORMAT_L_FLOAT32:
1153    case MESA_FORMAT_I_FLOAT32:
1154    case MESA_FORMAT_R_FLOAT32:
1155       *datatype = GL_FLOAT;
1156       *comps = 1;
1157       return;
1158    case MESA_FORMAT_A_FLOAT16:
1159    case MESA_FORMAT_L_FLOAT16:
1160    case MESA_FORMAT_I_FLOAT16:
1161    case MESA_FORMAT_R_FLOAT16:
1162       *datatype = GL_HALF_FLOAT_ARB;
1163       *comps = 1;
1164       return;
1165
1166    case MESA_FORMAT_A_UINT8:
1167    case MESA_FORMAT_L_UINT8:
1168    case MESA_FORMAT_I_UINT8:
1169       *datatype = GL_UNSIGNED_BYTE;
1170       *comps = 1;
1171       return;
1172    case MESA_FORMAT_LA_UINT8:
1173       *datatype = GL_UNSIGNED_BYTE;
1174       *comps = 2;
1175       return;
1176
1177    case MESA_FORMAT_A_UINT16:
1178    case MESA_FORMAT_L_UINT16:
1179    case MESA_FORMAT_I_UINT16:
1180       *datatype = GL_UNSIGNED_SHORT;
1181       *comps = 1;
1182       return;
1183    case MESA_FORMAT_LA_UINT16:
1184       *datatype = GL_UNSIGNED_SHORT;
1185       *comps = 2;
1186       return;
1187    case MESA_FORMAT_A_UINT32:
1188    case MESA_FORMAT_L_UINT32:
1189    case MESA_FORMAT_I_UINT32:
1190       *datatype = GL_UNSIGNED_INT;
1191       *comps = 1;
1192       return;
1193    case MESA_FORMAT_LA_UINT32:
1194       *datatype = GL_UNSIGNED_INT;
1195       *comps = 2;
1196       return;
1197    case MESA_FORMAT_A_SINT8:
1198    case MESA_FORMAT_L_SINT8:
1199    case MESA_FORMAT_I_SINT8:
1200       *datatype = GL_BYTE;
1201       *comps = 1;
1202       return;
1203    case MESA_FORMAT_LA_SINT8:
1204       *datatype = GL_BYTE;
1205       *comps = 2;
1206       return;
1207
1208    case MESA_FORMAT_A_SINT16:
1209    case MESA_FORMAT_L_SINT16:
1210    case MESA_FORMAT_I_SINT16:
1211       *datatype = GL_SHORT;
1212       *comps = 1;
1213       return;
1214    case MESA_FORMAT_LA_SINT16:
1215       *datatype = GL_SHORT;
1216       *comps = 2;
1217       return;
1218
1219    case MESA_FORMAT_A_SINT32:
1220    case MESA_FORMAT_L_SINT32:
1221    case MESA_FORMAT_I_SINT32:
1222       *datatype = GL_INT;
1223       *comps = 1;
1224       return;
1225    case MESA_FORMAT_LA_SINT32:
1226       *datatype = GL_INT;
1227       *comps = 2;
1228       return;
1229
1230    case MESA_FORMAT_R_SINT8:
1231       *datatype = GL_BYTE;
1232       *comps = 1;
1233       return;
1234    case MESA_FORMAT_RG_SINT8:
1235       *datatype = GL_BYTE;
1236       *comps = 2;
1237       return;
1238    case MESA_FORMAT_RGB_SINT8:
1239       *datatype = GL_BYTE;
1240       *comps = 3;
1241       return;
1242    case MESA_FORMAT_RGBA_SINT8:
1243       *datatype = GL_BYTE;
1244       *comps = 4;
1245       return;
1246    case MESA_FORMAT_R_SINT16:
1247       *datatype = GL_SHORT;
1248       *comps = 1;
1249       return;
1250    case MESA_FORMAT_RG_SINT16:
1251       *datatype = GL_SHORT;
1252       *comps = 2;
1253       return;
1254    case MESA_FORMAT_RGB_SINT16:
1255       *datatype = GL_SHORT;
1256       *comps = 3;
1257       return;
1258    case MESA_FORMAT_RGBA_SINT16:
1259       *datatype = GL_SHORT;
1260       *comps = 4;
1261       return;
1262    case MESA_FORMAT_R_SINT32:
1263       *datatype = GL_INT;
1264       *comps = 1;
1265       return;
1266    case MESA_FORMAT_RG_SINT32:
1267       *datatype = GL_INT;
1268       *comps = 2;
1269       return;
1270    case MESA_FORMAT_RGB_SINT32:
1271       *datatype = GL_INT;
1272       *comps = 3;
1273       return;
1274    case MESA_FORMAT_RGBA_SINT32:
1275       *datatype = GL_INT;
1276       *comps = 4;
1277       return;
1278
1279    /**
1280     * \name Non-normalized unsigned integer formats.
1281     */
1282    case MESA_FORMAT_R_UINT8:
1283       *datatype = GL_UNSIGNED_BYTE;
1284       *comps = 1;
1285       return;
1286    case MESA_FORMAT_RG_UINT8:
1287       *datatype = GL_UNSIGNED_BYTE;
1288       *comps = 2;
1289       return;
1290    case MESA_FORMAT_RGB_UINT8:
1291       *datatype = GL_UNSIGNED_BYTE;
1292       *comps = 3;
1293       return;
1294    case MESA_FORMAT_RGBA_UINT8:
1295       *datatype = GL_UNSIGNED_BYTE;
1296       *comps = 4;
1297       return;
1298    case MESA_FORMAT_R_UINT16:
1299       *datatype = GL_UNSIGNED_SHORT;
1300       *comps = 1;
1301       return;
1302    case MESA_FORMAT_RG_UINT16:
1303       *datatype = GL_UNSIGNED_SHORT;
1304       *comps = 2;
1305       return;
1306    case MESA_FORMAT_RGB_UINT16:
1307       *datatype = GL_UNSIGNED_SHORT;
1308       *comps = 3;
1309       return;
1310    case MESA_FORMAT_RGBA_UINT16:
1311       *datatype = GL_UNSIGNED_SHORT;
1312       *comps = 4;
1313       return;
1314    case MESA_FORMAT_R_UINT32:
1315       *datatype = GL_UNSIGNED_INT;
1316       *comps = 1;
1317       return;
1318    case MESA_FORMAT_RG_UINT32:
1319       *datatype = GL_UNSIGNED_INT;
1320       *comps = 2;
1321       return;
1322    case MESA_FORMAT_RGB_UINT32:
1323       *datatype = GL_UNSIGNED_INT;
1324       *comps = 3;
1325       return;
1326    case MESA_FORMAT_RGBA_UINT32:
1327       *datatype = GL_UNSIGNED_INT;
1328       *comps = 4;
1329       return;
1330
1331    case MESA_FORMAT_R9G9B9E5_FLOAT:
1332       *datatype = GL_UNSIGNED_INT_5_9_9_9_REV;
1333       *comps = 3;
1334       return;
1335
1336    case MESA_FORMAT_R11G11B10_FLOAT:
1337       *datatype = GL_UNSIGNED_INT_10F_11F_11F_REV;
1338       *comps = 3;
1339       return;
1340
1341    case MESA_FORMAT_B10G10R10A2_UINT:
1342    case MESA_FORMAT_R10G10B10A2_UINT:
1343       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1344       *comps = 4;
1345       return;
1346
1347    case MESA_FORMAT_R8G8B8X8_SRGB:
1348    case MESA_FORMAT_X8B8G8R8_SRGB:
1349    case MESA_FORMAT_RGBX_UINT8:
1350       *datatype = GL_UNSIGNED_BYTE;
1351       *comps = 4;
1352       return;
1353
1354    case MESA_FORMAT_R8G8B8X8_SNORM:
1355    case MESA_FORMAT_RGBX_SINT8:
1356       *datatype = GL_BYTE;
1357       *comps = 4;
1358       return;
1359
1360    case MESA_FORMAT_B10G10R10X2_UNORM:
1361    case MESA_FORMAT_R10G10B10X2_UNORM:
1362       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1363       *comps = 4;
1364       return;
1365
1366    case MESA_FORMAT_RGBX_UNORM16:
1367    case MESA_FORMAT_RGBX_UINT16:
1368       *datatype = GL_UNSIGNED_SHORT;
1369       *comps = 4;
1370       return;
1371
1372    case MESA_FORMAT_RGBX_SNORM16:
1373    case MESA_FORMAT_RGBX_SINT16:
1374       *datatype = GL_SHORT;
1375       *comps = 4;
1376       return;
1377
1378    case MESA_FORMAT_RGBX_FLOAT16:
1379       *datatype = GL_HALF_FLOAT;
1380       *comps = 4;
1381       return;
1382
1383    case MESA_FORMAT_RGBX_FLOAT32:
1384       *datatype = GL_FLOAT;
1385       *comps = 4;
1386       return;
1387
1388    case MESA_FORMAT_RGBX_UINT32:
1389       *datatype = GL_UNSIGNED_INT;
1390       *comps = 4;
1391       return;
1392
1393    case MESA_FORMAT_RGBX_SINT32:
1394       *datatype = GL_INT;
1395       *comps = 4;
1396       return;
1397
1398    case MESA_FORMAT_R10G10B10A2_UNORM:
1399       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1400       *comps = 4;
1401       return;
1402
1403    case MESA_FORMAT_G8R8_SNORM:
1404       *datatype = GL_BYTE;
1405       *comps = 2;
1406       return;
1407
1408    case MESA_FORMAT_G16R16_SNORM:
1409       *datatype = GL_SHORT;
1410       *comps = 2;
1411       return;
1412
1413    case MESA_FORMAT_B8G8R8X8_SRGB:
1414    case MESA_FORMAT_X8R8G8B8_SRGB:
1415       *datatype = GL_UNSIGNED_BYTE;
1416       *comps = 4;
1417       return;
1418
1419    case MESA_FORMAT_COUNT:
1420       assert(0);
1421       return;
1422    default:
1423       /* Warn if any formats are not handled */
1424       _mesa_problem(NULL, "bad format %s in _mesa_uncompressed_format_to_type_and_comps",
1425                     _mesa_get_format_name(format));
1426       assert(format == MESA_FORMAT_NONE ||
1427              _mesa_is_format_compressed(format));
1428       *datatype = 0;
1429       *comps = 1;
1430    }
1431 }
1432
1433 /**
1434  * Check if a mesa_format exactly matches a GL format/type combination
1435  * such that we can use memcpy() from one to the other.
1436  * \param mesa_format  a MESA_FORMAT_x value
1437  * \param format  the user-specified image format
1438  * \param type  the user-specified image datatype
1439  * \param swapBytes  typically the current pixel pack/unpack byteswap state
1440  * \param[out] error GL_NO_ERROR if format is an expected input.
1441  *                   GL_INVALID_ENUM if format is an unexpected input.
1442  * \return true if the formats match, false otherwise.
1443  */
1444 bool
1445 _mesa_format_matches_format_and_type(mesa_format mesa_format,
1446                                      GLenum format, GLenum type,
1447                                      bool swapBytes, GLenum *error)
1448 {
1449    const bool littleEndian = _mesa_little_endian();
1450    if (error)
1451       *error = GL_NO_ERROR;
1452
1453    /* Note: When reading a GL format/type combination, the format lists channel
1454     * assignments from most significant channel in the type to least
1455     * significant.  A type with _REV indicates that the assignments are
1456     * swapped, so they are listed from least significant to most significant.
1457     *
1458     * Compressed formats will fall through and return false.
1459     *
1460     * For sanity, please keep this switch statement ordered the same as the
1461     * enums in formats.h.
1462     */
1463
1464    switch (mesa_format) {
1465
1466    case MESA_FORMAT_NONE:
1467    case MESA_FORMAT_COUNT:
1468       return false;
1469
1470    case MESA_FORMAT_A8B8G8R8_UNORM:
1471    case MESA_FORMAT_A8B8G8R8_SRGB:
1472       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1473          return true;
1474
1475       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
1476          return true;
1477
1478       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !littleEndian)
1479          return true;
1480
1481       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV
1482           && !swapBytes)
1483          return true;
1484
1485       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8
1486           && swapBytes)
1487          return true;
1488
1489       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && littleEndian)
1490          return true;
1491
1492       return false;
1493
1494    case MESA_FORMAT_R8G8B8A8_UNORM:
1495    case MESA_FORMAT_R8G8B8A8_SRGB:
1496       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1497           !swapBytes)
1498          return true;
1499
1500       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1501          return true;
1502
1503       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && littleEndian)
1504          return true;
1505
1506       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8 &&
1507           !swapBytes)
1508          return true;
1509
1510       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1511           swapBytes)
1512          return true;
1513
1514       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && !littleEndian)
1515          return true;
1516
1517       return false;
1518
1519    case MESA_FORMAT_B8G8R8A8_UNORM:
1520    case MESA_FORMAT_B8G8R8A8_SRGB:
1521       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1522           !swapBytes)
1523          return true;
1524
1525       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1526          return true;
1527
1528       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && littleEndian)
1529          return true;
1530
1531       return false;
1532
1533    case MESA_FORMAT_A8R8G8B8_UNORM:
1534    case MESA_FORMAT_A8R8G8B8_SRGB:
1535       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1536          return true;
1537
1538       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1539           swapBytes)
1540          return true;
1541
1542       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && !littleEndian)
1543          return true;
1544
1545       return false;
1546
1547    case MESA_FORMAT_X8B8G8R8_UNORM:
1548    case MESA_FORMAT_R8G8B8X8_UNORM:
1549       return false;
1550
1551    case MESA_FORMAT_B8G8R8X8_UNORM:
1552    case MESA_FORMAT_X8R8G8B8_UNORM:
1553       return false;
1554
1555    case MESA_FORMAT_BGR_UNORM8:
1556    case MESA_FORMAT_BGR_SRGB8:
1557       return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
1558
1559    case MESA_FORMAT_RGB_UNORM8:
1560       return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
1561
1562    case MESA_FORMAT_B5G6R5_UNORM:
1563       return ((format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) ||
1564               (format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1565               !swapBytes;
1566
1567    case MESA_FORMAT_R5G6B5_UNORM:
1568       return ((format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5) ||
1569               (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1570               !swapBytes;
1571
1572    case MESA_FORMAT_B4G4R4A4_UNORM:
1573       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1574          !swapBytes;
1575
1576    case MESA_FORMAT_A4R4G4B4_UNORM:
1577       return false;
1578
1579    case MESA_FORMAT_A1B5G5R5_UNORM:
1580       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1581          !swapBytes;
1582
1583    case MESA_FORMAT_X1B5G5R5_UNORM:
1584       return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1585          !swapBytes;
1586
1587    case MESA_FORMAT_B5G5R5A1_UNORM:
1588       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1589          !swapBytes;
1590
1591    case MESA_FORMAT_A1R5G5B5_UNORM:
1592       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1593          !swapBytes;
1594
1595    case MESA_FORMAT_L4A4_UNORM:
1596       return false;
1597    case MESA_FORMAT_L8A8_UNORM:
1598    case MESA_FORMAT_L8A8_SRGB:
1599       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
1600    case MESA_FORMAT_A8L8_UNORM:
1601    case MESA_FORMAT_A8L8_SRGB:
1602       return false;
1603
1604    case MESA_FORMAT_L16A16_UNORM:
1605       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian && !swapBytes;
1606    case MESA_FORMAT_A16L16_UNORM:
1607       return false;
1608
1609    case MESA_FORMAT_B2G3R3_UNORM:
1610       return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
1611
1612    case MESA_FORMAT_R3G3B2_UNORM:
1613       return format == GL_RGB && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1614
1615    case MESA_FORMAT_A4B4G4R4_UNORM:
1616       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1617          return true;
1618
1619       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1620          return true;
1621
1622       return false;
1623
1624    case MESA_FORMAT_R4G4B4A4_UNORM:
1625       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1626          return true;
1627
1628       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1629          return true;
1630
1631       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1632          return true;
1633
1634       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1635          return true;
1636
1637       return false;
1638
1639    case MESA_FORMAT_R5G5B5A1_UNORM:
1640       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1641
1642    case MESA_FORMAT_A2B10G10R10_UNORM:
1643       return format == GL_RGBA && type == GL_UNSIGNED_INT_10_10_10_2;
1644
1645    case MESA_FORMAT_A2B10G10R10_UINT:
1646       return format == GL_RGBA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1647
1648    case MESA_FORMAT_A2R10G10B10_UNORM:
1649       return format == GL_BGRA && type == GL_UNSIGNED_INT_10_10_10_2;
1650
1651    case MESA_FORMAT_A2R10G10B10_UINT:
1652       return format == GL_BGRA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1653
1654    case MESA_FORMAT_A_UNORM8:
1655       return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
1656    case MESA_FORMAT_A_UNORM16:
1657       return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && !swapBytes;
1658    case MESA_FORMAT_L_UNORM8:
1659    case MESA_FORMAT_L_SRGB8:
1660       return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
1661    case MESA_FORMAT_L_UNORM16:
1662       return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && !swapBytes;
1663    case MESA_FORMAT_I_UNORM8:
1664       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1665    case MESA_FORMAT_I_UNORM16:
1666       return format == GL_RED && type == GL_UNSIGNED_SHORT && !swapBytes;
1667
1668    case MESA_FORMAT_YCBCR:
1669       return format == GL_YCBCR_MESA &&
1670              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian != swapBytes) ||
1671               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian == swapBytes));
1672    case MESA_FORMAT_YCBCR_REV:
1673       return format == GL_YCBCR_MESA &&
1674              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian == swapBytes) ||
1675               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian != swapBytes));
1676
1677    case MESA_FORMAT_R_UNORM8:
1678    case MESA_FORMAT_R_SRGB8:
1679       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1680    case MESA_FORMAT_R8G8_UNORM:
1681       return format == GL_RG && type == GL_UNSIGNED_BYTE && littleEndian;
1682    case MESA_FORMAT_G8R8_UNORM:
1683       return false;
1684
1685    case MESA_FORMAT_R_UNORM16:
1686       return format == GL_RED && type == GL_UNSIGNED_SHORT &&
1687          !swapBytes;
1688    case MESA_FORMAT_R16G16_UNORM:
1689       return format == GL_RG && type == GL_UNSIGNED_SHORT && littleEndian &&
1690          !swapBytes;
1691    case MESA_FORMAT_G16R16_UNORM:
1692       return false;
1693
1694    case MESA_FORMAT_B10G10R10A2_UNORM:
1695       return format == GL_BGRA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1696          !swapBytes;
1697
1698    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1699       return format == GL_DEPTH_STENCIL && type == GL_UNSIGNED_INT_24_8 &&
1700          !swapBytes;
1701    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1702    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1703       return false;
1704
1705    case MESA_FORMAT_Z_UNORM16:
1706       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT &&
1707          !swapBytes;
1708
1709    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1710       return false;
1711
1712    case MESA_FORMAT_Z_UNORM32:
1713       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT &&
1714          !swapBytes;
1715
1716    case MESA_FORMAT_S_UINT8:
1717       return format == GL_STENCIL_INDEX && type == GL_UNSIGNED_BYTE;
1718
1719    case MESA_FORMAT_RGBA_FLOAT32:
1720       return format == GL_RGBA && type == GL_FLOAT && !swapBytes;
1721    case MESA_FORMAT_RGBA_FLOAT16:
1722       return format == GL_RGBA && type == GL_HALF_FLOAT && !swapBytes;
1723
1724    case MESA_FORMAT_RGB_FLOAT32:
1725       return format == GL_RGB && type == GL_FLOAT && !swapBytes;
1726    case MESA_FORMAT_RGB_FLOAT16:
1727       return format == GL_RGB && type == GL_HALF_FLOAT && !swapBytes;
1728
1729    case MESA_FORMAT_A_FLOAT32:
1730       return format == GL_ALPHA && type == GL_FLOAT && !swapBytes;
1731    case MESA_FORMAT_A_FLOAT16:
1732       return format == GL_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1733
1734    case MESA_FORMAT_L_FLOAT32:
1735       return format == GL_LUMINANCE && type == GL_FLOAT && !swapBytes;
1736    case MESA_FORMAT_L_FLOAT16:
1737       return format == GL_LUMINANCE && type == GL_HALF_FLOAT && !swapBytes;
1738
1739    case MESA_FORMAT_LA_FLOAT32:
1740       return format == GL_LUMINANCE_ALPHA && type == GL_FLOAT && !swapBytes;
1741    case MESA_FORMAT_LA_FLOAT16:
1742       return format == GL_LUMINANCE_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1743
1744    case MESA_FORMAT_I_FLOAT32:
1745       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1746    case MESA_FORMAT_I_FLOAT16:
1747       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1748
1749    case MESA_FORMAT_R_FLOAT32:
1750       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1751    case MESA_FORMAT_R_FLOAT16:
1752       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1753
1754    case MESA_FORMAT_RG_FLOAT32:
1755       return format == GL_RG && type == GL_FLOAT && !swapBytes;
1756    case MESA_FORMAT_RG_FLOAT16:
1757       return format == GL_RG && type == GL_HALF_FLOAT && !swapBytes;
1758
1759    case MESA_FORMAT_A_UINT8:
1760       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_BYTE;
1761    case MESA_FORMAT_A_UINT16:
1762       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_SHORT &&
1763              !swapBytes;
1764    case MESA_FORMAT_A_UINT32:
1765       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_INT &&
1766              !swapBytes;
1767    case MESA_FORMAT_A_SINT8:
1768       return format == GL_ALPHA_INTEGER && type == GL_BYTE;
1769    case MESA_FORMAT_A_SINT16:
1770       return format == GL_ALPHA_INTEGER && type == GL_SHORT && !swapBytes;
1771    case MESA_FORMAT_A_SINT32:
1772       return format == GL_ALPHA_INTEGER && type == GL_INT && !swapBytes;
1773
1774    case MESA_FORMAT_I_UINT8:
1775       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1776    case MESA_FORMAT_I_UINT16:
1777       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1778    case MESA_FORMAT_I_UINT32:
1779       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1780    case MESA_FORMAT_I_SINT8:
1781       return format == GL_RED_INTEGER && type == GL_BYTE;
1782    case MESA_FORMAT_I_SINT16:
1783       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1784    case MESA_FORMAT_I_SINT32:
1785       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1786
1787    case MESA_FORMAT_L_UINT8:
1788       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_BYTE;
1789    case MESA_FORMAT_L_UINT16:
1790       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_SHORT &&
1791              !swapBytes;
1792    case MESA_FORMAT_L_UINT32:
1793       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_INT &&
1794              !swapBytes;
1795    case MESA_FORMAT_L_SINT8:
1796       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_BYTE;
1797    case MESA_FORMAT_L_SINT16:
1798       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_SHORT &&
1799              !swapBytes;
1800    case MESA_FORMAT_L_SINT32:
1801       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_INT && !swapBytes;
1802
1803    case MESA_FORMAT_LA_UINT8:
1804       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1805              type == GL_UNSIGNED_BYTE && !swapBytes;
1806    case MESA_FORMAT_LA_UINT16:
1807       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1808              type == GL_UNSIGNED_SHORT && !swapBytes;
1809    case MESA_FORMAT_LA_UINT32:
1810       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1811              type == GL_UNSIGNED_INT && !swapBytes;
1812    case MESA_FORMAT_LA_SINT8:
1813       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_BYTE &&
1814              !swapBytes;
1815    case MESA_FORMAT_LA_SINT16:
1816       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_SHORT &&
1817              !swapBytes;
1818    case MESA_FORMAT_LA_SINT32:
1819       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_INT &&
1820              !swapBytes;
1821
1822    case MESA_FORMAT_R_SINT8:
1823       return format == GL_RED_INTEGER && type == GL_BYTE;
1824    case MESA_FORMAT_RG_SINT8:
1825       return format == GL_RG_INTEGER && type == GL_BYTE && !swapBytes;
1826    case MESA_FORMAT_RGB_SINT8:
1827       return format == GL_RGB_INTEGER && type == GL_BYTE && !swapBytes;
1828    case MESA_FORMAT_RGBA_SINT8:
1829       return format == GL_RGBA_INTEGER && type == GL_BYTE && !swapBytes;
1830    case MESA_FORMAT_R_SINT16:
1831       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1832    case MESA_FORMAT_RG_SINT16:
1833       return format == GL_RG_INTEGER && type == GL_SHORT && !swapBytes;
1834    case MESA_FORMAT_RGB_SINT16:
1835       return format == GL_RGB_INTEGER && type == GL_SHORT && !swapBytes;
1836    case MESA_FORMAT_RGBA_SINT16:
1837       return format == GL_RGBA_INTEGER && type == GL_SHORT && !swapBytes;
1838    case MESA_FORMAT_R_SINT32:
1839       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1840    case MESA_FORMAT_RG_SINT32:
1841       return format == GL_RG_INTEGER && type == GL_INT && !swapBytes;
1842    case MESA_FORMAT_RGB_SINT32:
1843       return format == GL_RGB_INTEGER && type == GL_INT && !swapBytes;
1844    case MESA_FORMAT_RGBA_SINT32:
1845       return format == GL_RGBA_INTEGER && type == GL_INT && !swapBytes;
1846
1847    case MESA_FORMAT_R_UINT8:
1848       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1849    case MESA_FORMAT_RG_UINT8:
1850       return format == GL_RG_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1851    case MESA_FORMAT_RGB_UINT8:
1852       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1853    case MESA_FORMAT_RGBA_UINT8:
1854       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_BYTE &&
1855              !swapBytes;
1856    case MESA_FORMAT_R_UINT16:
1857       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT &&
1858              !swapBytes;
1859    case MESA_FORMAT_RG_UINT16:
1860       return format == GL_RG_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1861    case MESA_FORMAT_RGB_UINT16:
1862       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT &&
1863              !swapBytes;
1864    case MESA_FORMAT_RGBA_UINT16:
1865       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT &&
1866              !swapBytes;
1867    case MESA_FORMAT_R_UINT32:
1868       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1869    case MESA_FORMAT_RG_UINT32:
1870       return format == GL_RG_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1871    case MESA_FORMAT_RGB_UINT32:
1872       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1873    case MESA_FORMAT_RGBA_UINT32:
1874       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1875
1876    case MESA_FORMAT_R_SNORM8:
1877       return format == GL_RED && type == GL_BYTE;
1878    case MESA_FORMAT_R8G8_SNORM:
1879       return format == GL_RG && type == GL_BYTE && littleEndian &&
1880              !swapBytes;
1881    case MESA_FORMAT_X8B8G8R8_SNORM:
1882       return false;
1883
1884    case MESA_FORMAT_A8B8G8R8_SNORM:
1885       if (format == GL_RGBA && type == GL_BYTE && !littleEndian)
1886          return true;
1887
1888       if (format == GL_ABGR_EXT && type == GL_BYTE && littleEndian)
1889          return true;
1890
1891       return false;
1892
1893    case MESA_FORMAT_R8G8B8A8_SNORM:
1894       if (format == GL_RGBA && type == GL_BYTE && littleEndian)
1895          return true;
1896
1897       if (format == GL_ABGR_EXT && type == GL_BYTE && !littleEndian)
1898          return true;
1899
1900       return false;
1901
1902    case MESA_FORMAT_R_SNORM16:
1903       return format == GL_RED && type == GL_SHORT &&
1904              !swapBytes;
1905    case MESA_FORMAT_R16G16_SNORM:
1906       return format == GL_RG && type == GL_SHORT && littleEndian && !swapBytes;
1907    case MESA_FORMAT_RGB_SNORM16:
1908       return format == GL_RGB && type == GL_SHORT && !swapBytes;
1909    case MESA_FORMAT_RGBA_SNORM16:
1910       return format == GL_RGBA && type == GL_SHORT && !swapBytes;
1911    case MESA_FORMAT_RGBA_UNORM16:
1912       return format == GL_RGBA && type == GL_UNSIGNED_SHORT &&
1913              !swapBytes;
1914
1915    case MESA_FORMAT_A_SNORM8:
1916       return format == GL_ALPHA && type == GL_BYTE;
1917    case MESA_FORMAT_L_SNORM8:
1918       return format == GL_LUMINANCE && type == GL_BYTE;
1919    case MESA_FORMAT_L8A8_SNORM:
1920       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1921              littleEndian && !swapBytes;
1922    case MESA_FORMAT_A8L8_SNORM:
1923       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1924              !littleEndian && !swapBytes;
1925    case MESA_FORMAT_I_SNORM8:
1926       return format == GL_RED && type == GL_BYTE;
1927    case MESA_FORMAT_A_SNORM16:
1928       return format == GL_ALPHA && type == GL_SHORT && !swapBytes;
1929    case MESA_FORMAT_L_SNORM16:
1930       return format == GL_LUMINANCE && type == GL_SHORT && !swapBytes;
1931    case MESA_FORMAT_LA_SNORM16:
1932       return format == GL_LUMINANCE_ALPHA && type == GL_SHORT &&
1933              littleEndian && !swapBytes;
1934    case MESA_FORMAT_I_SNORM16:
1935       return format == GL_RED && type == GL_SHORT && littleEndian &&
1936              !swapBytes;
1937
1938    case MESA_FORMAT_B10G10R10A2_UINT:
1939       return (format == GL_BGRA_INTEGER_EXT &&
1940               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1941               !swapBytes);
1942
1943    case MESA_FORMAT_R10G10B10A2_UINT:
1944       return (format == GL_RGBA_INTEGER_EXT &&
1945               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1946               !swapBytes);
1947
1948    case MESA_FORMAT_B5G6R5_UINT:
1949       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5;
1950
1951    case MESA_FORMAT_R5G6B5_UINT:
1952       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5_REV;
1953
1954    case MESA_FORMAT_B2G3R3_UINT:
1955       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_3_3_2;
1956
1957    case MESA_FORMAT_R3G3B2_UINT:
1958       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1959
1960    case MESA_FORMAT_A4B4G4R4_UINT:
1961       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1962          return true;
1963
1964       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1965          return true;
1966       return false;
1967
1968    case MESA_FORMAT_R4G4B4A4_UINT:
1969       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1970          return true;
1971
1972       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1973          return true;
1974
1975       return false;
1976
1977    case MESA_FORMAT_B4G4R4A4_UINT:
1978       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1979          !swapBytes;
1980
1981    case MESA_FORMAT_A4R4G4B4_UINT:
1982       return false;
1983
1984    case MESA_FORMAT_A1B5G5R5_UINT:
1985       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1986          !swapBytes;
1987
1988    case MESA_FORMAT_B5G5R5A1_UINT:
1989       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1990          !swapBytes;
1991
1992    case MESA_FORMAT_A1R5G5B5_UINT:
1993       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1994          !swapBytes;
1995
1996    case MESA_FORMAT_R5G5B5A1_UINT:
1997       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1998
1999    case MESA_FORMAT_A8B8G8R8_UINT:
2000       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
2001          return true;
2002
2003       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
2004          return true;
2005       return false;
2006
2007    case MESA_FORMAT_A8R8G8B8_UINT:
2008       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 &&
2009           !swapBytes)
2010          return true;
2011
2012       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2013           swapBytes)
2014          return true;
2015
2016       return false;
2017
2018    case MESA_FORMAT_R8G8B8A8_UINT:
2019       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2020           !swapBytes)
2021          return true;
2022
2023       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
2024          return true;
2025
2026       return false;
2027
2028    case MESA_FORMAT_B8G8R8A8_UINT:
2029       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2030           !swapBytes)
2031          return true;
2032
2033       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
2034          return true;
2035
2036       return false;
2037
2038    case MESA_FORMAT_R9G9B9E5_FLOAT:
2039       return format == GL_RGB && type == GL_UNSIGNED_INT_5_9_9_9_REV &&
2040          !swapBytes;
2041
2042    case MESA_FORMAT_R11G11B10_FLOAT:
2043       return format == GL_RGB && type == GL_UNSIGNED_INT_10F_11F_11F_REV &&
2044          !swapBytes;
2045
2046    case MESA_FORMAT_Z_FLOAT32:
2047       return format == GL_DEPTH_COMPONENT && type == GL_FLOAT && !swapBytes;
2048
2049    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
2050       return format == GL_DEPTH_STENCIL &&
2051              type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV && !swapBytes;
2052
2053    case MESA_FORMAT_B4G4R4X4_UNORM:
2054    case MESA_FORMAT_B5G5R5X1_UNORM:
2055    case MESA_FORMAT_R8G8B8X8_SNORM:
2056    case MESA_FORMAT_R8G8B8X8_SRGB:
2057    case MESA_FORMAT_X8B8G8R8_SRGB:
2058    case MESA_FORMAT_RGBX_UINT8:
2059    case MESA_FORMAT_RGBX_SINT8:
2060    case MESA_FORMAT_B10G10R10X2_UNORM:
2061    case MESA_FORMAT_RGBX_UNORM16:
2062    case MESA_FORMAT_RGBX_SNORM16:
2063    case MESA_FORMAT_RGBX_FLOAT16:
2064    case MESA_FORMAT_RGBX_UINT16:
2065    case MESA_FORMAT_RGBX_SINT16:
2066    case MESA_FORMAT_RGBX_FLOAT32:
2067    case MESA_FORMAT_RGBX_UINT32:
2068    case MESA_FORMAT_RGBX_SINT32:
2069       return false;
2070
2071    case MESA_FORMAT_R10G10B10X2_UNORM:
2072       return format == GL_RGB && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2073          !swapBytes;
2074    case MESA_FORMAT_R10G10B10A2_UNORM:
2075       return format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2076          !swapBytes;
2077
2078    case MESA_FORMAT_G8R8_SNORM:
2079       return format == GL_RG && type == GL_BYTE && !littleEndian &&
2080          !swapBytes;
2081
2082    case MESA_FORMAT_G16R16_SNORM:
2083       return format == GL_RG && type == GL_SHORT && !littleEndian &&
2084          !swapBytes;
2085
2086    case MESA_FORMAT_B8G8R8X8_SRGB:
2087    case MESA_FORMAT_X8R8G8B8_SRGB:
2088       return false;
2089    default:
2090       assert(_mesa_is_format_compressed(mesa_format));
2091       if (error)
2092          *error = GL_INVALID_ENUM;
2093    }
2094    return false;
2095 }
2096