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 "imports.h"
  28 #include "formats.h"
  29 #include "macros.h"
  30 #include "glformats.h"
  31 #include "c11/threads.h"
  32 #include "util/hash_table.h"
  33
  34 /**
  35  * Information about texture formats.
  36  */
  37 struct gl_format_info
  38 {
  39    mesa_format Name;
  40
  41    /** text name for debugging */
  42    const char *StrName;
  43
  44    enum mesa_format_layout Layout;
  45
  46    /**
  47     * Base format is one of GL_RED, GL_RG, GL_RGB, GL_RGBA, GL_ALPHA,
  48     * GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY, GL_YCBCR_MESA,
  49     * GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
  50     */
  51    GLenum BaseFormat;
  52
  53    /**
  54     * Logical data type: one of  GL_UNSIGNED_NORMALIZED, GL_SIGNED_NORMALIZED,
  55     * GL_UNSIGNED_INT, GL_INT, GL_FLOAT.
  56     */
  57    GLenum DataType;
  58
  59    GLubyte RedBits;
  60    GLubyte GreenBits;
  61    GLubyte BlueBits;
  62    GLubyte AlphaBits;
  63    GLubyte LuminanceBits;
  64    GLubyte IntensityBits;
  65    GLubyte DepthBits;
  66    GLubyte StencilBits;
  67
  68    bool IsSRGBFormat;
  69
  70    /**
  71     * To describe compressed formats.  If not compressed, Width=Height=1.
  72     */
  73    GLubyte BlockWidth, BlockHeight;
  74    GLubyte BytesPerBlock;
  75
  76    uint8_t Swizzle[4];
  77    mesa_array_format ArrayFormat;
  78 };
  79
  80 #include "format_info.h"
  81
  82 static const struct gl_format_info *
  83 _mesa_get_format_info(mesa_format format)
  84 {
  85    const struct gl_format_info *info = &format_info[format];
  86    STATIC_ASSERT(ARRAY_SIZE(format_info) == MESA_FORMAT_COUNT);
  87    assert(info->Name == format);
  88    return info;
  89 }
  90
  91
  92 /** Return string name of format (for debugging) */
  93 const char *
  94 _mesa_get_format_name(mesa_format format)
  95 {
  96    const struct gl_format_info *info = _mesa_get_format_info(format);
  97    return info->StrName;
  98 }
  99
 100
 101
 102 /**
 103  * Return bytes needed to store a block of pixels in the given format.
 104  * Normally, a block is 1x1 (a single pixel).  But for compressed formats
 105  * a block may be 4x4 or 8x4, etc.
 106  *
 107  * Note: not GLuint, so as not to coerce math to unsigned. cf. fdo #37351
 108  */
 109 GLint
 110 _mesa_get_format_bytes(mesa_format format)
 111 {
 112    const struct gl_format_info *info = _mesa_get_format_info(format);
 113    assert(info->BytesPerBlock);
 114    assert(info->BytesPerBlock <= MAX_PIXEL_BYTES ||
 115           _mesa_is_format_compressed(format));
 116    return info->BytesPerBlock;
 117 }
 118
 119
 120 /**
 121  * Return bits per component for the given format.
 122  * \param format  one of MESA_FORMAT_x
 123  * \param pname  the component, such as GL_RED_BITS, GL_TEXTURE_BLUE_BITS, etc.
 124  */
 125 GLint
 126 _mesa_get_format_bits(mesa_format format, GLenum pname)
 127 {
 128    const struct gl_format_info *info = _mesa_get_format_info(format);
 129
 130    switch (pname) {
 131    case GL_RED_BITS:
 132    case GL_TEXTURE_RED_SIZE:
 133    case GL_RENDERBUFFER_RED_SIZE_EXT:
 134    case GL_FRAMEBUFFER_ATTACHMENT_RED_SIZE:
 135    case GL_INTERNALFORMAT_RED_SIZE:
 136       return info->RedBits;
 137    case GL_GREEN_BITS:
 138    case GL_TEXTURE_GREEN_SIZE:
 139    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
 140    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
 141    case GL_INTERNALFORMAT_GREEN_SIZE:
 142       return info->GreenBits;
 143    case GL_BLUE_BITS:
 144    case GL_TEXTURE_BLUE_SIZE:
 145    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
 146    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
 147    case GL_INTERNALFORMAT_BLUE_SIZE:
 148       return info->BlueBits;
 149    case GL_ALPHA_BITS:
 150    case GL_TEXTURE_ALPHA_SIZE:
 151    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
 152    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
 153    case GL_INTERNALFORMAT_ALPHA_SIZE:
 154       return info->AlphaBits;
 155    case GL_TEXTURE_INTENSITY_SIZE:
 156       return info->IntensityBits;
 157    case GL_TEXTURE_LUMINANCE_SIZE:
 158       return info->LuminanceBits;
 159    case GL_INDEX_BITS:
 160       return 0;
 161    case GL_DEPTH_BITS:
 162    case GL_TEXTURE_DEPTH_SIZE_ARB:
 163    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
 164    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
 165    case GL_INTERNALFORMAT_DEPTH_SIZE:
 166       return info->DepthBits;
 167    case GL_STENCIL_BITS:
 168    case GL_TEXTURE_STENCIL_SIZE_EXT:
 169    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
 170    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
 171    case GL_INTERNALFORMAT_STENCIL_SIZE:
 172       return info->StencilBits;
 173    default:
 174       _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
 175       return 0;
 176    }
 177 }
 178
 179
 180 GLuint
 181 _mesa_get_format_max_bits(mesa_format format)
 182 {
 183    const struct gl_format_info *info = _mesa_get_format_info(format);
 184    GLuint max = MAX2(info->RedBits, info->GreenBits);
 185    max = MAX2(max, info->BlueBits);
 186    max = MAX2(max, info->AlphaBits);
 187    max = MAX2(max, info->LuminanceBits);
 188    max = MAX2(max, info->IntensityBits);
 189    max = MAX2(max, info->DepthBits);
 190    max = MAX2(max, info->StencilBits);
 191    return max;
 192 }
 193
 194
 195 /**
 196  * Return the layout type of the given format.
 197  */
 198 extern enum mesa_format_layout
 199 _mesa_get_format_layout(mesa_format format)
 200 {
 201    const struct gl_format_info *info = _mesa_get_format_info(format);
 202    return info->Layout;
 203 }
 204
 205
 206 /**
 207  * Return the data type (or more specifically, the data representation)
 208  * for the given format.
 209  * The return value will be one of:
 210  *    GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
 211  *    GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
 212  *    GL_UNSIGNED_INT = an ordinary unsigned integer
 213  *    GL_INT = an ordinary signed integer
 214  *    GL_FLOAT = an ordinary float
 215  */
 216 GLenum
 217 _mesa_get_format_datatype(mesa_format format)
 218 {
 219    const struct gl_format_info *info = _mesa_get_format_info(format);
 220    return info->DataType;
 221 }
 222
 223 static GLenum
 224 get_base_format_for_array_format(mesa_array_format format)
 225 {
 226    uint8_t swizzle[4];
 227    int num_channels;
 228
 229    _mesa_array_format_get_swizzle(format, swizzle);
 230    num_channels = _mesa_array_format_get_num_channels(format);
 231
 232    switch (num_channels) {
 233    case 4:
 234       /* FIXME: RGBX formats have 4 channels, but their base format is GL_RGB.
 235        * This is not really a problem for now because we only create array
 236        * formats from GL format/type combinations, and these cannot specify
 237        * RGBX formats.
 238        */
 239       return GL_RGBA;
 240    case 3:
 241       return GL_RGB;
 242    case 2:
 243       if (swizzle[0] == 0 &&
 244           swizzle[1] == 0 &&
 245           swizzle[2] == 0 &&
 246           swizzle[3] == 1)
 247          return GL_LUMINANCE_ALPHA;
 248       if (swizzle[0] == 1 &&
 249           swizzle[1] == 1 &&
 250           swizzle[2] == 1 &&
 251           swizzle[3] == 0)
 252          return GL_LUMINANCE_ALPHA;
 253       if (swizzle[0] == 0 &&
 254           swizzle[1] == 1 &&
 255           swizzle[2] == 4 &&
 256           swizzle[3] == 5)
 257          return GL_RG;
 258       if (swizzle[0] == 1 &&
 259           swizzle[1] == 0 &&
 260           swizzle[2] == 4 &&
 261           swizzle[3] == 5)
 262          return GL_RG;
 263       break;
 264    case 1:
 265       if (swizzle[0] == 0 &&
 266           swizzle[1] == 0 &&
 267           swizzle[2] == 0 &&
 268           swizzle[3] == 5)
 269          return GL_LUMINANCE;
 270       if (swizzle[0] == 0 &&
 271           swizzle[1] == 0 &&
 272           swizzle[2] == 0 &&
 273           swizzle[3] == 0)
 274          return GL_INTENSITY;
 275       if (swizzle[0] <= MESA_FORMAT_SWIZZLE_W)
 276          return GL_RED;
 277       if (swizzle[1] <= MESA_FORMAT_SWIZZLE_W)
 278          return GL_GREEN;
 279       if (swizzle[2] <= MESA_FORMAT_SWIZZLE_W)
 280          return GL_BLUE;
 281       if (swizzle[3] <= MESA_FORMAT_SWIZZLE_W)
 282          return GL_ALPHA;
 283       break;
 284    }
 285
 286    unreachable("Unsupported format");
 287 }
 288
 289 /**
 290  * Return the basic format for the given type.  The result will be one of
 291  * GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
 292  * GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
 293  * This functions accepts a mesa_format or a mesa_array_format.
 294  */
 295 GLenum
 296 _mesa_get_format_base_format(uint32_t format)
 297 {
 298    if (!_mesa_format_is_mesa_array_format(format)) {
 299       const struct gl_format_info *info = _mesa_get_format_info(format);
 300       return info->BaseFormat;
 301    } else {
 302       return get_base_format_for_array_format(format);
 303    }
 304 }
 305
 306
 307 /**
 308  * Return the block size (in pixels) for the given format.  Normally
 309  * the block size is 1x1.  But compressed formats will have block sizes
 310  * of 4x4 or 8x4 pixels, etc.
 311  * \param bw  returns block width in pixels
 312  * \param bh  returns block height in pixels
 313  */
 314 void
 315 _mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh)
 316 {
 317    const struct gl_format_info *info = _mesa_get_format_info(format);
 318    *bw = info->BlockWidth;
 319    *bh = info->BlockHeight;
 320 }
 321
 322
 323 /**
 324  * Returns the an array of four numbers representing the transformation
 325  * from the RGBA or SZ colorspace to the given format.  For array formats,
 326  * the i'th RGBA component is given by:
 327  *
 328  * if (swizzle[i] <= MESA_FORMAT_SWIZZLE_W)
 329  *    comp = data[swizzle[i]];
 330  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ZERO)
 331  *    comp = 0;
 332  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ONE)
 333  *    comp = 1;
 334  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_NONE)
 335  *    // data does not contain a channel of this format
 336  *
 337  * For packed formats, the swizzle gives the number of components left of
 338  * the least significant bit.
 339  *
 340  * Compressed formats have no swizzle.
 341  */
 342 void
 343 _mesa_get_format_swizzle(mesa_format format, uint8_t swizzle_out[4])
 344 {
 345    const struct gl_format_info *info = _mesa_get_format_info(format);
 346    memcpy(swizzle_out, info->Swizzle, sizeof(info->Swizzle));
 347 }
 348
 349 mesa_array_format
 350 _mesa_array_format_flip_channels(mesa_array_format format)
 351 {
 352    int num_channels;
 353    uint8_t swizzle[4];
 354
 355    num_channels = _mesa_array_format_get_num_channels(format);
 356    _mesa_array_format_get_swizzle(format, swizzle);
 357
 358    if (num_channels == 1)
 359       return format;
 360
 361    if (num_channels == 2) {
 362       /* Assert that the swizzle makes sense for 2 channels */
 363       for (unsigned i = 0; i < 4; i++)
 364          assert(swizzle[i] != 2 && swizzle[i] != 3);
 365
 366       static const uint8_t flip_xy[6] = { 1, 0, 2, 3, 4, 5 };
 367       _mesa_array_format_set_swizzle(&format,
 368                                      flip_xy[swizzle[0]], flip_xy[swizzle[1]],
 369                                      flip_xy[swizzle[2]], flip_xy[swizzle[3]]);
 370       return format;
 371    }
 372
 373    if (num_channels == 4) {
 374       static const uint8_t flip[6] = { 3, 2, 1, 0, 4, 5 };
 375       _mesa_array_format_set_swizzle(&format,
 376                                      flip[swizzle[0]], flip[swizzle[1]],
 377                                      flip[swizzle[2]], flip[swizzle[3]]);
 378       return format;
 379    }
 380
 381    unreachable("Invalid array format");
 382 }
 383
 384 uint32_t
 385 _mesa_format_to_array_format(mesa_format format)
 386 {
 387    const struct gl_format_info *info = _mesa_get_format_info(format);
 388    if (info->ArrayFormat && !_mesa_little_endian() &&
 389        info->Layout == MESA_FORMAT_LAYOUT_PACKED)
 390       return _mesa_array_format_flip_channels(info->ArrayFormat);
 391    else
 392       return info->ArrayFormat;
 393 }
 394
 395 static struct hash_table *format_array_format_table;
 396 static once_flag format_array_format_table_exists = ONCE_FLAG_INIT;
 397
 398 static bool
 399 array_formats_equal(const void *a, const void *b)
 400 {
 401    return (intptr_t)a == (intptr_t)b;
 402 }
 403
 404 static void
 405 format_array_format_table_init(void)
 406 {
 407    const struct gl_format_info *info;
 408    mesa_array_format array_format;
 409    unsigned f;
 410
 411    format_array_format_table = _mesa_hash_table_create(NULL, NULL,
 412                                                        array_formats_equal);
 413
 414    if (!format_array_format_table) {
 415       _mesa_error_no_memory(__func__);
 416       return;
 417    }
 418
 419    for (f = 1; f < MESA_FORMAT_COUNT; ++f) {
 420       info = _mesa_get_format_info(f);
 421       if (!info->ArrayFormat)
 422          continue;
 423
 424       if (_mesa_little_endian()) {
 425          array_format = info->ArrayFormat;
 426       } else {
 427          array_format = _mesa_array_format_flip_channels(info->ArrayFormat);
 428       }
 429
 430       /* This can happen and does for some of the BGR formats.  Let's take
 431        * the first one in the list.
 432        */
 433       if (_mesa_hash_table_search_pre_hashed(format_array_format_table,
 434                                              array_format,
 435                                              (void *)(intptr_t)array_format))
 436          continue;
 437
 438       _mesa_hash_table_insert_pre_hashed(format_array_format_table,
 439                                          array_format,
 440                                          (void *)(intptr_t)array_format,
 441                                          (void *)(intptr_t)f);
 442    }
 443 }
 444
 445 mesa_format
 446 _mesa_format_from_array_format(uint32_t array_format)
 447 {
 448    struct hash_entry *entry;
 449
 450    assert(_mesa_format_is_mesa_array_format(array_format));
 451
 452    call_once(&format_array_format_table_exists, format_array_format_table_init);
 453
 454    if (!format_array_format_table) {
 455       static const once_flag once_flag_init = ONCE_FLAG_INIT;
 456       format_array_format_table_exists = once_flag_init;
 457       return MESA_FORMAT_NONE;
 458    }
 459
 460    entry = _mesa_hash_table_search_pre_hashed(format_array_format_table,
 461                                               array_format,
 462                                               (void *)(intptr_t)array_format);
 463    if (entry)
 464       return (intptr_t)entry->data;
 465    else
 466       return MESA_FORMAT_NONE;
 467 }
 468
 469 /** Is the given format a compressed format? */
 470 GLboolean
 471 _mesa_is_format_compressed(mesa_format format)
 472 {
 473    const struct gl_format_info *info = _mesa_get_format_info(format);
 474    return info->BlockWidth > 1 || info->BlockHeight > 1;
 475 }
 476
 477
 478 /**
 479  * Determine if the given format represents a packed depth/stencil buffer.
 480  */
 481 GLboolean
 482 _mesa_is_format_packed_depth_stencil(mesa_format format)
 483 {
 484    const struct gl_format_info *info = _mesa_get_format_info(format);
 485
 486    return info->BaseFormat == GL_DEPTH_STENCIL;
 487 }
 488
 489
 490 /**
 491  * Is the given format a signed/unsigned integer color format?
 492  */
 493 GLboolean
 494 _mesa_is_format_integer_color(mesa_format format)
 495 {
 496    const struct gl_format_info *info = _mesa_get_format_info(format);
 497    return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
 498       info->BaseFormat != GL_DEPTH_COMPONENT &&
 499       info->BaseFormat != GL_DEPTH_STENCIL &&
 500       info->BaseFormat != GL_STENCIL_INDEX;
 501 }
 502
 503
 504 /**
 505  * Is the given format an unsigned integer format?
 506  */
 507 GLboolean
 508 _mesa_is_format_unsigned(mesa_format format)
 509 {
 510    const struct gl_format_info *info = _mesa_get_format_info(format);
 511    return _mesa_is_type_unsigned(info->DataType);
 512 }
 513
 514
 515 /**
 516  * Does the given format store signed values?
 517  */
 518 GLboolean
 519 _mesa_is_format_signed(mesa_format format)
 520 {
 521    if (format == MESA_FORMAT_R11G11B10_FLOAT ||
 522        format == MESA_FORMAT_R9G9B9E5_FLOAT) {
 523       /* these packed float formats only store unsigned values */
 524       return GL_FALSE;
 525    }
 526    else {
 527       const struct gl_format_info *info = _mesa_get_format_info(format);
 528       return (info->DataType == GL_SIGNED_NORMALIZED ||
 529               info->DataType == GL_INT ||
 530               info->DataType == GL_FLOAT);
 531    }
 532 }
 533
 534 /**
 535  * Is the given format an integer format?
 536  */
 537 GLboolean
 538 _mesa_is_format_integer(mesa_format format)
 539 {
 540    const struct gl_format_info *info = _mesa_get_format_info(format);
 541    return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT);
 542 }
 543
 544
 545 /**
 546  * Return true if the given format is a color format.
 547  */
 548 GLenum
 549 _mesa_is_format_color_format(mesa_format format)
 550 {
 551    const struct gl_format_info *info = _mesa_get_format_info(format);
 552    switch (info->BaseFormat) {
 553    case GL_DEPTH_COMPONENT:
 554    case GL_STENCIL_INDEX:
 555    case GL_DEPTH_STENCIL:
 556       return false;
 557    default:
 558       return true;
 559    }
 560 }
 561
 562
 563 /**
 564  * Return color encoding for given format.
 565  * \return GL_LINEAR or GL_SRGB
 566  */
 567 GLenum
 568 _mesa_get_format_color_encoding(mesa_format format)
 569 {
 570    const struct gl_format_info *info = _mesa_get_format_info(format);
 571    return info->IsSRGBFormat ? GL_SRGB : GL_LINEAR;
 572 }
 573
 574
 575 /**
 576  * Return TRUE if format is an ETC2 compressed format specified
 577  * by GL_ARB_ES3_compatibility.
 578  */
 579 bool
 580 _mesa_is_format_etc2(mesa_format format)
 581 {
 582    switch (format) {
 583    case MESA_FORMAT_ETC2_RGB8:
 584    case MESA_FORMAT_ETC2_SRGB8:
 585    case MESA_FORMAT_ETC2_RGBA8_EAC:
 586    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 587    case MESA_FORMAT_ETC2_R11_EAC:
 588    case MESA_FORMAT_ETC2_RG11_EAC:
 589    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 590    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 591    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 592    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 593       return GL_TRUE;
 594    default:
 595       return GL_FALSE;
 596    }
 597 }
 598
 599
 600 /**
 601  * For an sRGB format, return the corresponding linear color space format.
 602  * For non-sRGB formats, return the format as-is.
 603  */
 604 mesa_format
 605 _mesa_get_srgb_format_linear(mesa_format format)
 606 {
 607    switch (format) {
 608    case MESA_FORMAT_BGR_SRGB8:
 609       format = MESA_FORMAT_BGR_UNORM8;
 610       break;
 611    case MESA_FORMAT_A8B8G8R8_SRGB:
 612       format = MESA_FORMAT_A8B8G8R8_UNORM;
 613       break;
 614    case MESA_FORMAT_B8G8R8A8_SRGB:
 615       format = MESA_FORMAT_B8G8R8A8_UNORM;
 616       break;
 617    case MESA_FORMAT_A8R8G8B8_SRGB:
 618       format = MESA_FORMAT_A8R8G8B8_UNORM;
 619       break;
 620    case MESA_FORMAT_R8G8B8A8_SRGB:
 621       format = MESA_FORMAT_R8G8B8A8_UNORM;
 622       break;
 623    case MESA_FORMAT_L_SRGB8:
 624       format = MESA_FORMAT_L_UNORM8;
 625       break;
 626    case MESA_FORMAT_L8A8_SRGB:
 627       format = MESA_FORMAT_L8A8_UNORM;
 628       break;
 629    case MESA_FORMAT_A8L8_SRGB:
 630       format = MESA_FORMAT_A8L8_UNORM;
 631       break;
 632    case MESA_FORMAT_SRGB_DXT1:
 633       format = MESA_FORMAT_RGB_DXT1;
 634       break;
 635    case MESA_FORMAT_SRGBA_DXT1:
 636       format = MESA_FORMAT_RGBA_DXT1;
 637       break;
 638    case MESA_FORMAT_SRGBA_DXT3:
 639       format = MESA_FORMAT_RGBA_DXT3;
 640       break;
 641    case MESA_FORMAT_SRGBA_DXT5:
 642       format = MESA_FORMAT_RGBA_DXT5;
 643       break;
 644    case MESA_FORMAT_R8G8B8X8_SRGB:
 645       format = MESA_FORMAT_R8G8B8X8_UNORM;
 646       break;
 647    case MESA_FORMAT_X8B8G8R8_SRGB:
 648       format = MESA_FORMAT_X8B8G8R8_UNORM;
 649       break;
 650    case MESA_FORMAT_ETC2_SRGB8:
 651       format = MESA_FORMAT_ETC2_RGB8;
 652       break;
 653    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 654       format = MESA_FORMAT_ETC2_RGBA8_EAC;
 655       break;
 656    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 657       format = MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
 658       break;
 659    case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
 660       format = MESA_FORMAT_BPTC_RGBA_UNORM;
 661       break;
 662    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4:
 663       format = MESA_FORMAT_RGBA_ASTC_4x4;
 664       break;
 665    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4:
 666       format = MESA_FORMAT_RGBA_ASTC_5x4;
 667       break;
 668    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5:
 669       format = MESA_FORMAT_RGBA_ASTC_5x5;
 670       break;
 671    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5:
 672       format = MESA_FORMAT_RGBA_ASTC_6x5;
 673       break;
 674    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6:
 675       format = MESA_FORMAT_RGBA_ASTC_6x6;
 676       break;
 677    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x5:
 678       format = MESA_FORMAT_RGBA_ASTC_8x5;
 679       break;
 680    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x6:
 681       format = MESA_FORMAT_RGBA_ASTC_8x6;
 682       break;
 683    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x8:
 684       format = MESA_FORMAT_RGBA_ASTC_8x8;
 685       break;
 686    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x5:
 687       format = MESA_FORMAT_RGBA_ASTC_10x5;
 688       break;
 689    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x6:
 690       format = MESA_FORMAT_RGBA_ASTC_10x6;
 691       break;
 692    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x8:
 693       format = MESA_FORMAT_RGBA_ASTC_10x8;
 694       break;
 695    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x10:
 696       format = MESA_FORMAT_RGBA_ASTC_10x10;
 697       break;
 698    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x10:
 699       format = MESA_FORMAT_RGBA_ASTC_12x10;
 700       break;
 701    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x12:
 702       format = MESA_FORMAT_RGBA_ASTC_12x12;
 703       break;
 704    case MESA_FORMAT_B8G8R8X8_SRGB:
 705       format = MESA_FORMAT_B8G8R8X8_UNORM;
 706       break;
 707    case MESA_FORMAT_X8R8G8B8_SRGB:
 708       format = MESA_FORMAT_X8R8G8B8_UNORM;
 709       break;
 710    default:
 711       break;
 712    }
 713    return format;
 714 }
 715
 716
 717 /**
 718  * If the given format is a compressed format, return a corresponding
 719  * uncompressed format.
 720  */
 721 mesa_format
 722 _mesa_get_uncompressed_format(mesa_format format)
 723 {
 724    switch (format) {
 725    case MESA_FORMAT_RGB_FXT1:
 726       return MESA_FORMAT_BGR_UNORM8;
 727    case MESA_FORMAT_RGBA_FXT1:
 728       return MESA_FORMAT_A8B8G8R8_UNORM;
 729    case MESA_FORMAT_RGB_DXT1:
 730    case MESA_FORMAT_SRGB_DXT1:
 731       return MESA_FORMAT_BGR_UNORM8;
 732    case MESA_FORMAT_RGBA_DXT1:
 733    case MESA_FORMAT_SRGBA_DXT1:
 734       return MESA_FORMAT_A8B8G8R8_UNORM;
 735    case MESA_FORMAT_RGBA_DXT3:
 736    case MESA_FORMAT_SRGBA_DXT3:
 737       return MESA_FORMAT_A8B8G8R8_UNORM;
 738    case MESA_FORMAT_RGBA_DXT5:
 739    case MESA_FORMAT_SRGBA_DXT5:
 740       return MESA_FORMAT_A8B8G8R8_UNORM;
 741    case MESA_FORMAT_R_RGTC1_UNORM:
 742       return MESA_FORMAT_R_UNORM8;
 743    case MESA_FORMAT_R_RGTC1_SNORM:
 744       return MESA_FORMAT_R_SNORM8;
 745    case MESA_FORMAT_RG_RGTC2_UNORM:
 746       return MESA_FORMAT_R8G8_UNORM;
 747    case MESA_FORMAT_RG_RGTC2_SNORM:
 748       return MESA_FORMAT_R8G8_SNORM;
 749    case MESA_FORMAT_L_LATC1_UNORM:
 750       return MESA_FORMAT_L_UNORM8;
 751    case MESA_FORMAT_L_LATC1_SNORM:
 752       return MESA_FORMAT_L_SNORM8;
 753    case MESA_FORMAT_LA_LATC2_UNORM:
 754       return MESA_FORMAT_L8A8_UNORM;
 755    case MESA_FORMAT_LA_LATC2_SNORM:
 756       return MESA_FORMAT_L8A8_SNORM;
 757    case MESA_FORMAT_ETC1_RGB8:
 758    case MESA_FORMAT_ETC2_RGB8:
 759    case MESA_FORMAT_ETC2_SRGB8:
 760       return MESA_FORMAT_BGR_UNORM8;
 761    case MESA_FORMAT_ETC2_RGBA8_EAC:
 762    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 763    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 764    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 765       return MESA_FORMAT_A8B8G8R8_UNORM;
 766    case MESA_FORMAT_ETC2_R11_EAC:
 767    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 768       return MESA_FORMAT_R_UNORM16;
 769    case MESA_FORMAT_ETC2_RG11_EAC:
 770    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 771       return MESA_FORMAT_R16G16_UNORM;
 772    case MESA_FORMAT_BPTC_RGBA_UNORM:
 773    case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
 774       return MESA_FORMAT_A8B8G8R8_UNORM;
 775    case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
 776    case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
 777       return MESA_FORMAT_RGB_FLOAT32;
 778    default:
 779 #ifdef DEBUG
 780       assert(!_mesa_is_format_compressed(format));
 781 #endif
 782       return format;
 783    }
 784 }
 785
 786
 787 GLuint
 788 _mesa_format_num_components(mesa_format format)
 789 {
 790    const struct gl_format_info *info = _mesa_get_format_info(format);
 791    return ((info->RedBits > 0) +
 792            (info->GreenBits > 0) +
 793            (info->BlueBits > 0) +
 794            (info->AlphaBits > 0) +
 795            (info->LuminanceBits > 0) +
 796            (info->IntensityBits > 0) +
 797            (info->DepthBits > 0) +
 798            (info->StencilBits > 0));
 799 }
 800
 801
 802 /**
 803  * Returns true if a color format has data stored in the R/G/B/A channels,
 804  * given an index from 0 to 3.
 805  */
 806 bool
 807 _mesa_format_has_color_component(mesa_format format, int component)
 808 {
 809    const struct gl_format_info *info = _mesa_get_format_info(format);
 810
 811    assert(info->BaseFormat != GL_DEPTH_COMPONENT &&
 812           info->BaseFormat != GL_DEPTH_STENCIL &&
 813           info->BaseFormat != GL_STENCIL_INDEX);
 814
 815    switch (component) {
 816    case 0:
 817       return (info->RedBits + info->IntensityBits + info->LuminanceBits) > 0;
 818    case 1:
 819       return (info->GreenBits + info->IntensityBits + info->LuminanceBits) > 0;
 820    case 2:
 821       return (info->BlueBits + info->IntensityBits + info->LuminanceBits) > 0;
 822    case 3:
 823       return (info->AlphaBits + info->IntensityBits) > 0;
 824    default:
 825       assert(!"Invalid color component: must be 0..3");
 826       return false;
 827    }
 828 }
 829
 830
 831 /**
 832  * Return number of bytes needed to store an image of the given size
 833  * in the given format.
 834  */
 835 GLuint
 836 _mesa_format_image_size(mesa_format format, GLsizei width,
 837                         GLsizei height, GLsizei depth)
 838 {
 839    const struct gl_format_info *info = _mesa_get_format_info(format);
 840    /* Strictly speaking, a conditional isn't needed here */
 841    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 842       /* compressed format (2D only for now) */
 843       const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
 844       const GLuint wblocks = (width + bw - 1) / bw;
 845       const GLuint hblocks = (height + bh - 1) / bh;
 846       const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
 847       return sz * depth;
 848    }
 849    else {
 850       /* non-compressed */
 851       const GLuint sz = width * height * depth * info->BytesPerBlock;
 852       return sz;
 853    }
 854 }
 855
 856
 857 /**
 858  * Same as _mesa_format_image_size() but returns a 64-bit value to
 859  * accommodate very large textures.
 860  */
 861 uint64_t
 862 _mesa_format_image_size64(mesa_format format, GLsizei width,
 863                           GLsizei height, GLsizei depth)
 864 {
 865    const struct gl_format_info *info = _mesa_get_format_info(format);
 866    /* Strictly speaking, a conditional isn't needed here */
 867    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 868       /* compressed format (2D only for now) */
 869       const uint64_t bw = info->BlockWidth, bh = info->BlockHeight;
 870       const uint64_t wblocks = (width + bw - 1) / bw;
 871       const uint64_t hblocks = (height + bh - 1) / bh;
 872       const uint64_t sz = wblocks * hblocks * info->BytesPerBlock;
 873       return sz * depth;
 874    }
 875    else {
 876       /* non-compressed */
 877       const uint64_t sz = ((uint64_t) width *
 878                            (uint64_t) height *
 879                            (uint64_t) depth *
 880                            info->BytesPerBlock);
 881       return sz;
 882    }
 883 }
 884
 885
 886
 887 GLint
 888 _mesa_format_row_stride(mesa_format format, GLsizei width)
 889 {
 890    const struct gl_format_info *info = _mesa_get_format_info(format);
 891    /* Strictly speaking, a conditional isn't needed here */
 892    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 893       /* compressed format */
 894       const GLuint bw = info->BlockWidth;
 895       const GLuint wblocks = (width + bw - 1) / bw;
 896       const GLint stride = wblocks * info->BytesPerBlock;
 897       return stride;
 898    }
 899    else {
 900       const GLint stride = width * info->BytesPerBlock;
 901       return stride;
 902    }
 903 }
 904
 905
 906
 907 /**
 908  * Return datatype and number of components per texel for the given
 909  * uncompressed mesa_format. Only used for mipmap generation code.
 910  */
 911 void
 912 _mesa_uncompressed_format_to_type_and_comps(mesa_format format,
 913                                GLenum *datatype, GLuint *comps)
 914 {
 915    switch (format) {
 916    case MESA_FORMAT_A8B8G8R8_UNORM:
 917    case MESA_FORMAT_R8G8B8A8_UNORM:
 918    case MESA_FORMAT_B8G8R8A8_UNORM:
 919    case MESA_FORMAT_A8R8G8B8_UNORM:
 920    case MESA_FORMAT_X8B8G8R8_UNORM:
 921    case MESA_FORMAT_R8G8B8X8_UNORM:
 922    case MESA_FORMAT_B8G8R8X8_UNORM:
 923    case MESA_FORMAT_X8R8G8B8_UNORM:
 924    case MESA_FORMAT_A8B8G8R8_UINT:
 925    case MESA_FORMAT_R8G8B8A8_UINT:
 926    case MESA_FORMAT_B8G8R8A8_UINT:
 927    case MESA_FORMAT_A8R8G8B8_UINT:
 928       *datatype = GL_UNSIGNED_BYTE;
 929       *comps = 4;
 930       return;
 931    case MESA_FORMAT_BGR_UNORM8:
 932    case MESA_FORMAT_RGB_UNORM8:
 933       *datatype = GL_UNSIGNED_BYTE;
 934       *comps = 3;
 935       return;
 936    case MESA_FORMAT_B5G6R5_UNORM:
 937    case MESA_FORMAT_R5G6B5_UNORM:
 938    case MESA_FORMAT_B5G6R5_UINT:
 939    case MESA_FORMAT_R5G6B5_UINT:
 940       *datatype = GL_UNSIGNED_SHORT_5_6_5;
 941       *comps = 3;
 942       return;
 943
 944    case MESA_FORMAT_B4G4R4A4_UNORM:
 945    case MESA_FORMAT_A4R4G4B4_UNORM:
 946    case MESA_FORMAT_B4G4R4X4_UNORM:
 947    case MESA_FORMAT_B4G4R4A4_UINT:
 948    case MESA_FORMAT_A4R4G4B4_UINT:
 949       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 950       *comps = 4;
 951       return;
 952
 953    case MESA_FORMAT_B5G5R5A1_UNORM:
 954    case MESA_FORMAT_A1R5G5B5_UNORM:
 955    case MESA_FORMAT_B5G5R5X1_UNORM:
 956    case MESA_FORMAT_B5G5R5A1_UINT:
 957    case MESA_FORMAT_A1R5G5B5_UINT:
 958       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 959       *comps = 4;
 960       return;
 961
 962    case MESA_FORMAT_B10G10R10A2_UNORM:
 963       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
 964       *comps = 4;
 965       return;
 966
 967    case MESA_FORMAT_A1B5G5R5_UNORM:
 968    case MESA_FORMAT_A1B5G5R5_UINT:
 969       *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
 970       *comps = 4;
 971       return;
 972
 973    case MESA_FORMAT_L4A4_UNORM:
 974       *datatype = MESA_UNSIGNED_BYTE_4_4;
 975       *comps = 2;
 976       return;
 977
 978    case MESA_FORMAT_L8A8_UNORM:
 979    case MESA_FORMAT_A8L8_UNORM:
 980    case MESA_FORMAT_R8G8_UNORM:
 981    case MESA_FORMAT_G8R8_UNORM:
 982       *datatype = GL_UNSIGNED_BYTE;
 983       *comps = 2;
 984       return;
 985
 986    case MESA_FORMAT_L16A16_UNORM:
 987    case MESA_FORMAT_A16L16_UNORM:
 988    case MESA_FORMAT_R16G16_UNORM:
 989    case MESA_FORMAT_G16R16_UNORM:
 990       *datatype = GL_UNSIGNED_SHORT;
 991       *comps = 2;
 992       return;
 993
 994    case MESA_FORMAT_R_UNORM16:
 995    case MESA_FORMAT_A_UNORM16:
 996    case MESA_FORMAT_L_UNORM16:
 997    case MESA_FORMAT_I_UNORM16:
 998       *datatype = GL_UNSIGNED_SHORT;
 999       *comps = 1;
1000       return;
1001
1002    case MESA_FORMAT_R3G3B2_UNORM:
1003    case MESA_FORMAT_R3G3B2_UINT:
1004       *datatype = GL_UNSIGNED_BYTE_2_3_3_REV;
1005       *comps = 3;
1006       return;
1007    case MESA_FORMAT_A4B4G4R4_UNORM:
1008    case MESA_FORMAT_A4B4G4R4_UINT:
1009       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1010       *comps = 4;
1011       return;
1012
1013    case MESA_FORMAT_R4G4B4A4_UNORM:
1014    case MESA_FORMAT_R4G4B4A4_UINT:
1015       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1016       *comps = 4;
1017       return;
1018    case MESA_FORMAT_R5G5B5A1_UNORM:
1019    case MESA_FORMAT_R5G5B5A1_UINT:
1020       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1021       *comps = 4;
1022       return;
1023    case MESA_FORMAT_A2B10G10R10_UNORM:
1024    case MESA_FORMAT_A2B10G10R10_UINT:
1025       *datatype = GL_UNSIGNED_INT_10_10_10_2;
1026       *comps = 4;
1027       return;
1028    case MESA_FORMAT_A2R10G10B10_UNORM:
1029    case MESA_FORMAT_A2R10G10B10_UINT:
1030       *datatype = GL_UNSIGNED_INT_10_10_10_2;
1031       *comps = 4;
1032       return;
1033
1034    case MESA_FORMAT_B2G3R3_UNORM:
1035    case MESA_FORMAT_B2G3R3_UINT:
1036       *datatype = GL_UNSIGNED_BYTE_3_3_2;
1037       *comps = 3;
1038       return;
1039
1040    case MESA_FORMAT_A_UNORM8:
1041    case MESA_FORMAT_L_UNORM8:
1042    case MESA_FORMAT_I_UNORM8:
1043    case MESA_FORMAT_R_UNORM8:
1044    case MESA_FORMAT_S_UINT8:
1045       *datatype = GL_UNSIGNED_BYTE;
1046       *comps = 1;
1047       return;
1048
1049    case MESA_FORMAT_YCBCR:
1050    case MESA_FORMAT_YCBCR_REV:
1051       *datatype = GL_UNSIGNED_SHORT;
1052       *comps = 2;
1053       return;
1054
1055    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1056       *datatype = GL_UNSIGNED_INT_24_8_MESA;
1057       *comps = 2;
1058       return;
1059
1060    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1061       *datatype = GL_UNSIGNED_INT_8_24_REV_MESA;
1062       *comps = 2;
1063       return;
1064
1065    case MESA_FORMAT_Z_UNORM16:
1066       *datatype = GL_UNSIGNED_SHORT;
1067       *comps = 1;
1068       return;
1069
1070    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1071       *datatype = GL_UNSIGNED_INT;
1072       *comps = 1;
1073       return;
1074
1075    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1076       *datatype = GL_UNSIGNED_INT;
1077       *comps = 1;
1078       return;
1079
1080    case MESA_FORMAT_Z_UNORM32:
1081       *datatype = GL_UNSIGNED_INT;
1082       *comps = 1;
1083       return;
1084
1085    case MESA_FORMAT_Z_FLOAT32:
1086       *datatype = GL_FLOAT;
1087       *comps = 1;
1088       return;
1089
1090    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
1091       *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
1092       *comps = 1;
1093       return;
1094
1095    case MESA_FORMAT_R_SNORM8:
1096    case MESA_FORMAT_A_SNORM8:
1097    case MESA_FORMAT_L_SNORM8:
1098    case MESA_FORMAT_I_SNORM8:
1099       *datatype = GL_BYTE;
1100       *comps = 1;
1101       return;
1102    case MESA_FORMAT_R8G8_SNORM:
1103    case MESA_FORMAT_L8A8_SNORM:
1104    case MESA_FORMAT_A8L8_SNORM:
1105       *datatype = GL_BYTE;
1106       *comps = 2;
1107       return;
1108    case MESA_FORMAT_A8B8G8R8_SNORM:
1109    case MESA_FORMAT_R8G8B8A8_SNORM:
1110    case MESA_FORMAT_X8B8G8R8_SNORM:
1111       *datatype = GL_BYTE;
1112       *comps = 4;
1113       return;
1114
1115    case MESA_FORMAT_RGBA_UNORM16:
1116       *datatype = GL_UNSIGNED_SHORT;
1117       *comps = 4;
1118       return;
1119
1120    case MESA_FORMAT_R_SNORM16:
1121    case MESA_FORMAT_A_SNORM16:
1122    case MESA_FORMAT_L_SNORM16:
1123    case MESA_FORMAT_I_SNORM16:
1124       *datatype = GL_SHORT;
1125       *comps = 1;
1126       return;
1127    case MESA_FORMAT_R16G16_SNORM:
1128    case MESA_FORMAT_LA_SNORM16:
1129       *datatype = GL_SHORT;
1130       *comps = 2;
1131       return;
1132    case MESA_FORMAT_RGB_SNORM16:
1133       *datatype = GL_SHORT;
1134       *comps = 3;
1135       return;
1136    case MESA_FORMAT_RGBA_SNORM16:
1137       *datatype = GL_SHORT;
1138       *comps = 4;
1139       return;
1140
1141    case MESA_FORMAT_BGR_SRGB8:
1142       *datatype = GL_UNSIGNED_BYTE;
1143       *comps = 3;
1144       return;
1145    case MESA_FORMAT_A8B8G8R8_SRGB:
1146    case MESA_FORMAT_B8G8R8A8_SRGB:
1147    case MESA_FORMAT_A8R8G8B8_SRGB:
1148    case MESA_FORMAT_R8G8B8A8_SRGB:
1149       *datatype = GL_UNSIGNED_BYTE;
1150       *comps = 4;
1151       return;
1152    case MESA_FORMAT_L_SRGB8:
1153       *datatype = GL_UNSIGNED_BYTE;
1154       *comps = 1;
1155       return;
1156    case MESA_FORMAT_L8A8_SRGB:
1157    case MESA_FORMAT_A8L8_SRGB:
1158       *datatype = GL_UNSIGNED_BYTE;
1159       *comps = 2;
1160       return;
1161
1162    case MESA_FORMAT_RGBA_FLOAT32:
1163       *datatype = GL_FLOAT;
1164       *comps = 4;
1165       return;
1166    case MESA_FORMAT_RGBA_FLOAT16:
1167       *datatype = GL_HALF_FLOAT_ARB;
1168       *comps = 4;
1169       return;
1170    case MESA_FORMAT_RGB_FLOAT32:
1171       *datatype = GL_FLOAT;
1172       *comps = 3;
1173       return;
1174    case MESA_FORMAT_RGB_FLOAT16:
1175       *datatype = GL_HALF_FLOAT_ARB;
1176       *comps = 3;
1177       return;
1178    case MESA_FORMAT_LA_FLOAT32:
1179    case MESA_FORMAT_RG_FLOAT32:
1180       *datatype = GL_FLOAT;
1181       *comps = 2;
1182       return;
1183    case MESA_FORMAT_LA_FLOAT16:
1184    case MESA_FORMAT_RG_FLOAT16:
1185       *datatype = GL_HALF_FLOAT_ARB;
1186       *comps = 2;
1187       return;
1188    case MESA_FORMAT_A_FLOAT32:
1189    case MESA_FORMAT_L_FLOAT32:
1190    case MESA_FORMAT_I_FLOAT32:
1191    case MESA_FORMAT_R_FLOAT32:
1192       *datatype = GL_FLOAT;
1193       *comps = 1;
1194       return;
1195    case MESA_FORMAT_A_FLOAT16:
1196    case MESA_FORMAT_L_FLOAT16:
1197    case MESA_FORMAT_I_FLOAT16:
1198    case MESA_FORMAT_R_FLOAT16:
1199       *datatype = GL_HALF_FLOAT_ARB;
1200       *comps = 1;
1201       return;
1202
1203    case MESA_FORMAT_A_UINT8:
1204    case MESA_FORMAT_L_UINT8:
1205    case MESA_FORMAT_I_UINT8:
1206       *datatype = GL_UNSIGNED_BYTE;
1207       *comps = 1;
1208       return;
1209    case MESA_FORMAT_LA_UINT8:
1210       *datatype = GL_UNSIGNED_BYTE;
1211       *comps = 2;
1212       return;
1213
1214    case MESA_FORMAT_A_UINT16:
1215    case MESA_FORMAT_L_UINT16:
1216    case MESA_FORMAT_I_UINT16:
1217       *datatype = GL_UNSIGNED_SHORT;
1218       *comps = 1;
1219       return;
1220    case MESA_FORMAT_LA_UINT16:
1221       *datatype = GL_UNSIGNED_SHORT;
1222       *comps = 2;
1223       return;
1224    case MESA_FORMAT_A_UINT32:
1225    case MESA_FORMAT_L_UINT32:
1226    case MESA_FORMAT_I_UINT32:
1227       *datatype = GL_UNSIGNED_INT;
1228       *comps = 1;
1229       return;
1230    case MESA_FORMAT_LA_UINT32:
1231       *datatype = GL_UNSIGNED_INT;
1232       *comps = 2;
1233       return;
1234    case MESA_FORMAT_A_SINT8:
1235    case MESA_FORMAT_L_SINT8:
1236    case MESA_FORMAT_I_SINT8:
1237       *datatype = GL_BYTE;
1238       *comps = 1;
1239       return;
1240    case MESA_FORMAT_LA_SINT8:
1241       *datatype = GL_BYTE;
1242       *comps = 2;
1243       return;
1244
1245    case MESA_FORMAT_A_SINT16:
1246    case MESA_FORMAT_L_SINT16:
1247    case MESA_FORMAT_I_SINT16:
1248       *datatype = GL_SHORT;
1249       *comps = 1;
1250       return;
1251    case MESA_FORMAT_LA_SINT16:
1252       *datatype = GL_SHORT;
1253       *comps = 2;
1254       return;
1255
1256    case MESA_FORMAT_A_SINT32:
1257    case MESA_FORMAT_L_SINT32:
1258    case MESA_FORMAT_I_SINT32:
1259       *datatype = GL_INT;
1260       *comps = 1;
1261       return;
1262    case MESA_FORMAT_LA_SINT32:
1263       *datatype = GL_INT;
1264       *comps = 2;
1265       return;
1266
1267    case MESA_FORMAT_R_SINT8:
1268       *datatype = GL_BYTE;
1269       *comps = 1;
1270       return;
1271    case MESA_FORMAT_RG_SINT8:
1272       *datatype = GL_BYTE;
1273       *comps = 2;
1274       return;
1275    case MESA_FORMAT_RGB_SINT8:
1276       *datatype = GL_BYTE;
1277       *comps = 3;
1278       return;
1279    case MESA_FORMAT_RGBA_SINT8:
1280       *datatype = GL_BYTE;
1281       *comps = 4;
1282       return;
1283    case MESA_FORMAT_R_SINT16:
1284       *datatype = GL_SHORT;
1285       *comps = 1;
1286       return;
1287    case MESA_FORMAT_RG_SINT16:
1288       *datatype = GL_SHORT;
1289       *comps = 2;
1290       return;
1291    case MESA_FORMAT_RGB_SINT16:
1292       *datatype = GL_SHORT;
1293       *comps = 3;
1294       return;
1295    case MESA_FORMAT_RGBA_SINT16:
1296       *datatype = GL_SHORT;
1297       *comps = 4;
1298       return;
1299    case MESA_FORMAT_R_SINT32:
1300       *datatype = GL_INT;
1301       *comps = 1;
1302       return;
1303    case MESA_FORMAT_RG_SINT32:
1304       *datatype = GL_INT;
1305       *comps = 2;
1306       return;
1307    case MESA_FORMAT_RGB_SINT32:
1308       *datatype = GL_INT;
1309       *comps = 3;
1310       return;
1311    case MESA_FORMAT_RGBA_SINT32:
1312       *datatype = GL_INT;
1313       *comps = 4;
1314       return;
1315
1316    /**
1317     * \name Non-normalized unsigned integer formats.
1318     */
1319    case MESA_FORMAT_R_UINT8:
1320       *datatype = GL_UNSIGNED_BYTE;
1321       *comps = 1;
1322       return;
1323    case MESA_FORMAT_RG_UINT8:
1324       *datatype = GL_UNSIGNED_BYTE;
1325       *comps = 2;
1326       return;
1327    case MESA_FORMAT_RGB_UINT8:
1328       *datatype = GL_UNSIGNED_BYTE;
1329       *comps = 3;
1330       return;
1331    case MESA_FORMAT_RGBA_UINT8:
1332       *datatype = GL_UNSIGNED_BYTE;
1333       *comps = 4;
1334       return;
1335    case MESA_FORMAT_R_UINT16:
1336       *datatype = GL_UNSIGNED_SHORT;
1337       *comps = 1;
1338       return;
1339    case MESA_FORMAT_RG_UINT16:
1340       *datatype = GL_UNSIGNED_SHORT;
1341       *comps = 2;
1342       return;
1343    case MESA_FORMAT_RGB_UINT16:
1344       *datatype = GL_UNSIGNED_SHORT;
1345       *comps = 3;
1346       return;
1347    case MESA_FORMAT_RGBA_UINT16:
1348       *datatype = GL_UNSIGNED_SHORT;
1349       *comps = 4;
1350       return;
1351    case MESA_FORMAT_R_UINT32:
1352       *datatype = GL_UNSIGNED_INT;
1353       *comps = 1;
1354       return;
1355    case MESA_FORMAT_RG_UINT32:
1356       *datatype = GL_UNSIGNED_INT;
1357       *comps = 2;
1358       return;
1359    case MESA_FORMAT_RGB_UINT32:
1360       *datatype = GL_UNSIGNED_INT;
1361       *comps = 3;
1362       return;
1363    case MESA_FORMAT_RGBA_UINT32:
1364       *datatype = GL_UNSIGNED_INT;
1365       *comps = 4;
1366       return;
1367
1368    case MESA_FORMAT_R9G9B9E5_FLOAT:
1369       *datatype = GL_UNSIGNED_INT_5_9_9_9_REV;
1370       *comps = 3;
1371       return;
1372
1373    case MESA_FORMAT_R11G11B10_FLOAT:
1374       *datatype = GL_UNSIGNED_INT_10F_11F_11F_REV;
1375       *comps = 3;
1376       return;
1377
1378    case MESA_FORMAT_B10G10R10A2_UINT:
1379    case MESA_FORMAT_R10G10B10A2_UINT:
1380       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1381       *comps = 4;
1382       return;
1383
1384    case MESA_FORMAT_R8G8B8X8_SRGB:
1385    case MESA_FORMAT_X8B8G8R8_SRGB:
1386    case MESA_FORMAT_RGBX_UINT8:
1387       *datatype = GL_UNSIGNED_BYTE;
1388       *comps = 4;
1389       return;
1390
1391    case MESA_FORMAT_R8G8B8X8_SNORM:
1392    case MESA_FORMAT_RGBX_SINT8:
1393       *datatype = GL_BYTE;
1394       *comps = 4;
1395       return;
1396
1397    case MESA_FORMAT_B10G10R10X2_UNORM:
1398    case MESA_FORMAT_R10G10B10X2_UNORM:
1399       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1400       *comps = 4;
1401       return;
1402
1403    case MESA_FORMAT_RGBX_UNORM16:
1404    case MESA_FORMAT_RGBX_UINT16:
1405       *datatype = GL_UNSIGNED_SHORT;
1406       *comps = 4;
1407       return;
1408
1409    case MESA_FORMAT_RGBX_SNORM16:
1410    case MESA_FORMAT_RGBX_SINT16:
1411       *datatype = GL_SHORT;
1412       *comps = 4;
1413       return;
1414
1415    case MESA_FORMAT_RGBX_FLOAT16:
1416       *datatype = GL_HALF_FLOAT;
1417       *comps = 4;
1418       return;
1419
1420    case MESA_FORMAT_RGBX_FLOAT32:
1421       *datatype = GL_FLOAT;
1422       *comps = 4;
1423       return;
1424
1425    case MESA_FORMAT_RGBX_UINT32:
1426       *datatype = GL_UNSIGNED_INT;
1427       *comps = 4;
1428       return;
1429
1430    case MESA_FORMAT_RGBX_SINT32:
1431       *datatype = GL_INT;
1432       *comps = 4;
1433       return;
1434
1435    case MESA_FORMAT_R10G10B10A2_UNORM:
1436       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1437       *comps = 4;
1438       return;
1439
1440    case MESA_FORMAT_G8R8_SNORM:
1441       *datatype = GL_BYTE;
1442       *comps = 2;
1443       return;
1444
1445    case MESA_FORMAT_G16R16_SNORM:
1446       *datatype = GL_SHORT;
1447       *comps = 2;
1448       return;
1449
1450    case MESA_FORMAT_B8G8R8X8_SRGB:
1451    case MESA_FORMAT_X8R8G8B8_SRGB:
1452       *datatype = GL_UNSIGNED_BYTE;
1453       *comps = 4;
1454       return;
1455
1456    case MESA_FORMAT_COUNT:
1457       assert(0);
1458       return;
1459    default:
1460       /* Warn if any formats are not handled */
1461       _mesa_problem(NULL, "bad format %s in _mesa_uncompressed_format_to_type_and_comps",
1462                     _mesa_get_format_name(format));
1463       assert(format == MESA_FORMAT_NONE ||
1464              _mesa_is_format_compressed(format));
1465       *datatype = 0;
1466       *comps = 1;
1467    }
1468 }
1469
1470 /**
1471  * Check if a mesa_format exactly matches a GL format/type combination
1472  * such that we can use memcpy() from one to the other.
1473  * \param mesa_format  a MESA_FORMAT_x value
1474  * \param format  the user-specified image format
1475  * \param type  the user-specified image datatype
1476  * \param swapBytes  typically the current pixel pack/unpack byteswap state
1477  * \param[out] error GL_NO_ERROR if format is an expected input.
1478  *                   GL_INVALID_ENUM if format is an unexpected input.
1479  * \return GL_TRUE if the formats match, GL_FALSE otherwise.
1480  */
1481 GLboolean
1482 _mesa_format_matches_format_and_type(mesa_format mesa_format,
1483                                      GLenum format, GLenum type,
1484                                      GLboolean swapBytes, GLenum *error)
1485 {
1486    const GLboolean littleEndian = _mesa_little_endian();
1487    if (error)
1488       *error = GL_NO_ERROR;
1489
1490    /* Note: When reading a GL format/type combination, the format lists channel
1491     * assignments from most significant channel in the type to least
1492     * significant.  A type with _REV indicates that the assignments are
1493     * swapped, so they are listed from least significant to most significant.
1494     *
1495     * Compressed formats will fall through and return GL_FALSE.
1496     *
1497     * For sanity, please keep this switch statement ordered the same as the
1498     * enums in formats.h.
1499     */
1500
1501    switch (mesa_format) {
1502
1503    case MESA_FORMAT_NONE:
1504    case MESA_FORMAT_COUNT:
1505       return GL_FALSE;
1506
1507    case MESA_FORMAT_A8B8G8R8_UNORM:
1508    case MESA_FORMAT_A8B8G8R8_SRGB:
1509       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1510          return GL_TRUE;
1511
1512       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
1513          return GL_TRUE;
1514
1515       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !littleEndian)
1516          return GL_TRUE;
1517
1518       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV
1519           && !swapBytes)
1520          return GL_TRUE;
1521
1522       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8
1523           && swapBytes)
1524          return GL_TRUE;
1525
1526       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && littleEndian)
1527          return GL_TRUE;
1528
1529       return GL_FALSE;
1530
1531    case MESA_FORMAT_R8G8B8A8_UNORM:
1532    case MESA_FORMAT_R8G8B8A8_SRGB:
1533       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1534           !swapBytes)
1535          return GL_TRUE;
1536
1537       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1538          return GL_TRUE;
1539
1540       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && littleEndian)
1541          return GL_TRUE;
1542
1543       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8 &&
1544           !swapBytes)
1545          return GL_TRUE;
1546
1547       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1548           swapBytes)
1549          return GL_TRUE;
1550
1551       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && !littleEndian)
1552          return GL_TRUE;
1553
1554       return GL_FALSE;
1555
1556    case MESA_FORMAT_B8G8R8A8_UNORM:
1557    case MESA_FORMAT_B8G8R8A8_SRGB:
1558       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1559           !swapBytes)
1560          return GL_TRUE;
1561
1562       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1563          return GL_TRUE;
1564
1565       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && littleEndian)
1566          return GL_TRUE;
1567
1568       return GL_FALSE;
1569
1570    case MESA_FORMAT_A8R8G8B8_UNORM:
1571    case MESA_FORMAT_A8R8G8B8_SRGB:
1572       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1573          return GL_TRUE;
1574
1575       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1576           swapBytes)
1577          return GL_TRUE;
1578
1579       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && !littleEndian)
1580          return GL_TRUE;
1581
1582       return GL_FALSE;
1583
1584    case MESA_FORMAT_X8B8G8R8_UNORM:
1585    case MESA_FORMAT_R8G8B8X8_UNORM:
1586       return GL_FALSE;
1587
1588    case MESA_FORMAT_B8G8R8X8_UNORM:
1589    case MESA_FORMAT_X8R8G8B8_UNORM:
1590       return GL_FALSE;
1591
1592    case MESA_FORMAT_BGR_UNORM8:
1593    case MESA_FORMAT_BGR_SRGB8:
1594       return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
1595
1596    case MESA_FORMAT_RGB_UNORM8:
1597       return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
1598
1599    case MESA_FORMAT_B5G6R5_UNORM:
1600       return ((format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) ||
1601               (format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1602               !swapBytes;
1603
1604    case MESA_FORMAT_R5G6B5_UNORM:
1605       return ((format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5) ||
1606               (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1607               !swapBytes;
1608
1609    case MESA_FORMAT_B4G4R4A4_UNORM:
1610       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1611          !swapBytes;
1612
1613    case MESA_FORMAT_A4R4G4B4_UNORM:
1614       return GL_FALSE;
1615
1616    case MESA_FORMAT_A1B5G5R5_UNORM:
1617       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1618          !swapBytes;
1619
1620    case MESA_FORMAT_B5G5R5A1_UNORM:
1621       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1622          !swapBytes;
1623
1624    case MESA_FORMAT_A1R5G5B5_UNORM:
1625       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1626          !swapBytes;
1627
1628    case MESA_FORMAT_L4A4_UNORM:
1629       return GL_FALSE;
1630    case MESA_FORMAT_L8A8_UNORM:
1631    case MESA_FORMAT_L8A8_SRGB:
1632       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
1633    case MESA_FORMAT_A8L8_UNORM:
1634    case MESA_FORMAT_A8L8_SRGB:
1635       return GL_FALSE;
1636
1637    case MESA_FORMAT_L16A16_UNORM:
1638       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian && !swapBytes;
1639    case MESA_FORMAT_A16L16_UNORM:
1640       return GL_FALSE;
1641
1642    case MESA_FORMAT_B2G3R3_UNORM:
1643       return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
1644
1645    case MESA_FORMAT_R3G3B2_UNORM:
1646       return format == GL_RGB && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1647
1648    case MESA_FORMAT_A4B4G4R4_UNORM:
1649       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1650          return GL_TRUE;
1651
1652       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1653          return GL_TRUE;
1654
1655       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1656          return GL_TRUE;
1657
1658       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1659          return GL_TRUE;
1660
1661       return GL_FALSE;
1662
1663    case MESA_FORMAT_R4G4B4A4_UNORM:
1664       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1665          return GL_TRUE;
1666
1667       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1668          return GL_TRUE;
1669
1670       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1671          return GL_TRUE;
1672
1673       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1674          return GL_TRUE;
1675
1676       return GL_FALSE;
1677
1678    case MESA_FORMAT_R5G5B5A1_UNORM:
1679       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1680
1681    case MESA_FORMAT_A2B10G10R10_UNORM:
1682       return format == GL_RGBA && type == GL_UNSIGNED_INT_10_10_10_2;
1683
1684    case MESA_FORMAT_A2B10G10R10_UINT:
1685       return format == GL_RGBA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1686
1687    case MESA_FORMAT_A2R10G10B10_UNORM:
1688       return format == GL_BGRA && type == GL_UNSIGNED_INT_10_10_10_2;
1689
1690    case MESA_FORMAT_A2R10G10B10_UINT:
1691       return format == GL_BGRA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1692
1693    case MESA_FORMAT_A_UNORM8:
1694       return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
1695    case MESA_FORMAT_A_UNORM16:
1696       return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && !swapBytes;
1697    case MESA_FORMAT_L_UNORM8:
1698    case MESA_FORMAT_L_SRGB8:
1699       return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
1700    case MESA_FORMAT_L_UNORM16:
1701       return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && !swapBytes;
1702    case MESA_FORMAT_I_UNORM8:
1703       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1704    case MESA_FORMAT_I_UNORM16:
1705       return format == GL_RED && type == GL_UNSIGNED_SHORT && !swapBytes;
1706
1707    case MESA_FORMAT_YCBCR:
1708       return format == GL_YCBCR_MESA &&
1709              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian != swapBytes) ||
1710               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian == swapBytes));
1711    case MESA_FORMAT_YCBCR_REV:
1712       return format == GL_YCBCR_MESA &&
1713              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian == swapBytes) ||
1714               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian != swapBytes));
1715
1716    case MESA_FORMAT_R_UNORM8:
1717       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1718    case MESA_FORMAT_R8G8_UNORM:
1719       return format == GL_RG && type == GL_UNSIGNED_BYTE && littleEndian;
1720    case MESA_FORMAT_G8R8_UNORM:
1721       return GL_FALSE;
1722
1723    case MESA_FORMAT_R_UNORM16:
1724       return format == GL_RED && type == GL_UNSIGNED_SHORT &&
1725          !swapBytes;
1726    case MESA_FORMAT_R16G16_UNORM:
1727       return format == GL_RG && type == GL_UNSIGNED_SHORT && littleEndian &&
1728          !swapBytes;
1729    case MESA_FORMAT_G16R16_UNORM:
1730       return GL_FALSE;
1731
1732    case MESA_FORMAT_B10G10R10A2_UNORM:
1733       return format == GL_BGRA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1734          !swapBytes;
1735
1736    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1737       return format == GL_DEPTH_STENCIL && type == GL_UNSIGNED_INT_24_8 &&
1738          !swapBytes;
1739    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1740    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1741       return GL_FALSE;
1742
1743    case MESA_FORMAT_Z_UNORM16:
1744       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT &&
1745          !swapBytes;
1746
1747    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1748       return GL_FALSE;
1749
1750    case MESA_FORMAT_Z_UNORM32:
1751       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT &&
1752          !swapBytes;
1753
1754    case MESA_FORMAT_S_UINT8:
1755       return format == GL_STENCIL_INDEX && type == GL_UNSIGNED_BYTE;
1756
1757    case MESA_FORMAT_RGBA_FLOAT32:
1758       return format == GL_RGBA && type == GL_FLOAT && !swapBytes;
1759    case MESA_FORMAT_RGBA_FLOAT16:
1760       return format == GL_RGBA && type == GL_HALF_FLOAT && !swapBytes;
1761
1762    case MESA_FORMAT_RGB_FLOAT32:
1763       return format == GL_RGB && type == GL_FLOAT && !swapBytes;
1764    case MESA_FORMAT_RGB_FLOAT16:
1765       return format == GL_RGB && type == GL_HALF_FLOAT && !swapBytes;
1766
1767    case MESA_FORMAT_A_FLOAT32:
1768       return format == GL_ALPHA && type == GL_FLOAT && !swapBytes;
1769    case MESA_FORMAT_A_FLOAT16:
1770       return format == GL_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1771
1772    case MESA_FORMAT_L_FLOAT32:
1773       return format == GL_LUMINANCE && type == GL_FLOAT && !swapBytes;
1774    case MESA_FORMAT_L_FLOAT16:
1775       return format == GL_LUMINANCE && type == GL_HALF_FLOAT && !swapBytes;
1776
1777    case MESA_FORMAT_LA_FLOAT32:
1778       return format == GL_LUMINANCE_ALPHA && type == GL_FLOAT && !swapBytes;
1779    case MESA_FORMAT_LA_FLOAT16:
1780       return format == GL_LUMINANCE_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1781
1782    case MESA_FORMAT_I_FLOAT32:
1783       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1784    case MESA_FORMAT_I_FLOAT16:
1785       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1786
1787    case MESA_FORMAT_R_FLOAT32:
1788       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1789    case MESA_FORMAT_R_FLOAT16:
1790       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1791
1792    case MESA_FORMAT_RG_FLOAT32:
1793       return format == GL_RG && type == GL_FLOAT && !swapBytes;
1794    case MESA_FORMAT_RG_FLOAT16:
1795       return format == GL_RG && type == GL_HALF_FLOAT && !swapBytes;
1796
1797    case MESA_FORMAT_A_UINT8:
1798       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_BYTE;
1799    case MESA_FORMAT_A_UINT16:
1800       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_SHORT &&
1801              !swapBytes;
1802    case MESA_FORMAT_A_UINT32:
1803       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_INT &&
1804              !swapBytes;
1805    case MESA_FORMAT_A_SINT8:
1806       return format == GL_ALPHA_INTEGER && type == GL_BYTE;
1807    case MESA_FORMAT_A_SINT16:
1808       return format == GL_ALPHA_INTEGER && type == GL_SHORT && !swapBytes;
1809    case MESA_FORMAT_A_SINT32:
1810       return format == GL_ALPHA_INTEGER && type == GL_INT && !swapBytes;
1811
1812    case MESA_FORMAT_I_UINT8:
1813       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1814    case MESA_FORMAT_I_UINT16:
1815       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1816    case MESA_FORMAT_I_UINT32:
1817       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1818    case MESA_FORMAT_I_SINT8:
1819       return format == GL_RED_INTEGER && type == GL_BYTE;
1820    case MESA_FORMAT_I_SINT16:
1821       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1822    case MESA_FORMAT_I_SINT32:
1823       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1824
1825    case MESA_FORMAT_L_UINT8:
1826       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_BYTE;
1827    case MESA_FORMAT_L_UINT16:
1828       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_SHORT &&
1829              !swapBytes;
1830    case MESA_FORMAT_L_UINT32:
1831       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_INT &&
1832              !swapBytes;
1833    case MESA_FORMAT_L_SINT8:
1834       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_BYTE;
1835    case MESA_FORMAT_L_SINT16:
1836       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_SHORT &&
1837              !swapBytes;
1838    case MESA_FORMAT_L_SINT32:
1839       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_INT && !swapBytes;
1840
1841    case MESA_FORMAT_LA_UINT8:
1842       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1843              type == GL_UNSIGNED_BYTE && !swapBytes;
1844    case MESA_FORMAT_LA_UINT16:
1845       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1846              type == GL_UNSIGNED_SHORT && !swapBytes;
1847    case MESA_FORMAT_LA_UINT32:
1848       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1849              type == GL_UNSIGNED_INT && !swapBytes;
1850    case MESA_FORMAT_LA_SINT8:
1851       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_BYTE &&
1852              !swapBytes;
1853    case MESA_FORMAT_LA_SINT16:
1854       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_SHORT &&
1855              !swapBytes;
1856    case MESA_FORMAT_LA_SINT32:
1857       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_INT &&
1858              !swapBytes;
1859
1860    case MESA_FORMAT_R_SINT8:
1861       return format == GL_RED_INTEGER && type == GL_BYTE;
1862    case MESA_FORMAT_RG_SINT8:
1863       return format == GL_RG_INTEGER && type == GL_BYTE && !swapBytes;
1864    case MESA_FORMAT_RGB_SINT8:
1865       return format == GL_RGB_INTEGER && type == GL_BYTE && !swapBytes;
1866    case MESA_FORMAT_RGBA_SINT8:
1867       return format == GL_RGBA_INTEGER && type == GL_BYTE && !swapBytes;
1868    case MESA_FORMAT_R_SINT16:
1869       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1870    case MESA_FORMAT_RG_SINT16:
1871       return format == GL_RG_INTEGER && type == GL_SHORT && !swapBytes;
1872    case MESA_FORMAT_RGB_SINT16:
1873       return format == GL_RGB_INTEGER && type == GL_SHORT && !swapBytes;
1874    case MESA_FORMAT_RGBA_SINT16:
1875       return format == GL_RGBA_INTEGER && type == GL_SHORT && !swapBytes;
1876    case MESA_FORMAT_R_SINT32:
1877       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1878    case MESA_FORMAT_RG_SINT32:
1879       return format == GL_RG_INTEGER && type == GL_INT && !swapBytes;
1880    case MESA_FORMAT_RGB_SINT32:
1881       return format == GL_RGB_INTEGER && type == GL_INT && !swapBytes;
1882    case MESA_FORMAT_RGBA_SINT32:
1883       return format == GL_RGBA_INTEGER && type == GL_INT && !swapBytes;
1884
1885    case MESA_FORMAT_R_UINT8:
1886       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1887    case MESA_FORMAT_RG_UINT8:
1888       return format == GL_RG_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1889    case MESA_FORMAT_RGB_UINT8:
1890       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1891    case MESA_FORMAT_RGBA_UINT8:
1892       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_BYTE &&
1893              !swapBytes;
1894    case MESA_FORMAT_R_UINT16:
1895       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT &&
1896              !swapBytes;
1897    case MESA_FORMAT_RG_UINT16:
1898       return format == GL_RG_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1899    case MESA_FORMAT_RGB_UINT16:
1900       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT &&
1901              !swapBytes;
1902    case MESA_FORMAT_RGBA_UINT16:
1903       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT &&
1904              !swapBytes;
1905    case MESA_FORMAT_R_UINT32:
1906       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1907    case MESA_FORMAT_RG_UINT32:
1908       return format == GL_RG_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1909    case MESA_FORMAT_RGB_UINT32:
1910       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1911    case MESA_FORMAT_RGBA_UINT32:
1912       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1913
1914    case MESA_FORMAT_R_SNORM8:
1915       return format == GL_RED && type == GL_BYTE;
1916    case MESA_FORMAT_R8G8_SNORM:
1917       return format == GL_RG && type == GL_BYTE && littleEndian &&
1918              !swapBytes;
1919    case MESA_FORMAT_X8B8G8R8_SNORM:
1920       return GL_FALSE;
1921
1922    case MESA_FORMAT_A8B8G8R8_SNORM:
1923       if (format == GL_RGBA && type == GL_BYTE && !littleEndian)
1924          return GL_TRUE;
1925
1926       if (format == GL_ABGR_EXT && type == GL_BYTE && littleEndian)
1927          return GL_TRUE;
1928
1929       return GL_FALSE;
1930
1931    case MESA_FORMAT_R8G8B8A8_SNORM:
1932       if (format == GL_RGBA && type == GL_BYTE && littleEndian)
1933          return GL_TRUE;
1934
1935       if (format == GL_ABGR_EXT && type == GL_BYTE && !littleEndian)
1936          return GL_TRUE;
1937
1938       return GL_FALSE;
1939
1940    case MESA_FORMAT_R_SNORM16:
1941       return format == GL_RED && type == GL_SHORT &&
1942              !swapBytes;
1943    case MESA_FORMAT_R16G16_SNORM:
1944       return format == GL_RG && type == GL_SHORT && littleEndian && !swapBytes;
1945    case MESA_FORMAT_RGB_SNORM16:
1946       return format == GL_RGB && type == GL_SHORT && !swapBytes;
1947    case MESA_FORMAT_RGBA_SNORM16:
1948       return format == GL_RGBA && type == GL_SHORT && !swapBytes;
1949    case MESA_FORMAT_RGBA_UNORM16:
1950       return format == GL_RGBA && type == GL_UNSIGNED_SHORT &&
1951              !swapBytes;
1952
1953    case MESA_FORMAT_A_SNORM8:
1954       return format == GL_ALPHA && type == GL_BYTE;
1955    case MESA_FORMAT_L_SNORM8:
1956       return format == GL_LUMINANCE && type == GL_BYTE;
1957    case MESA_FORMAT_L8A8_SNORM:
1958       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1959              littleEndian && !swapBytes;
1960    case MESA_FORMAT_A8L8_SNORM:
1961       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1962              !littleEndian && !swapBytes;
1963    case MESA_FORMAT_I_SNORM8:
1964       return format == GL_RED && type == GL_BYTE;
1965    case MESA_FORMAT_A_SNORM16:
1966       return format == GL_ALPHA && type == GL_SHORT && !swapBytes;
1967    case MESA_FORMAT_L_SNORM16:
1968       return format == GL_LUMINANCE && type == GL_SHORT && !swapBytes;
1969    case MESA_FORMAT_LA_SNORM16:
1970       return format == GL_LUMINANCE_ALPHA && type == GL_SHORT &&
1971              littleEndian && !swapBytes;
1972    case MESA_FORMAT_I_SNORM16:
1973       return format == GL_RED && type == GL_SHORT && littleEndian &&
1974              !swapBytes;
1975
1976    case MESA_FORMAT_B10G10R10A2_UINT:
1977       return (format == GL_BGRA_INTEGER_EXT &&
1978               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1979               !swapBytes);
1980
1981    case MESA_FORMAT_R10G10B10A2_UINT:
1982       return (format == GL_RGBA_INTEGER_EXT &&
1983               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1984               !swapBytes);
1985
1986    case MESA_FORMAT_B5G6R5_UINT:
1987       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5;
1988
1989    case MESA_FORMAT_R5G6B5_UINT:
1990       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5_REV;
1991
1992    case MESA_FORMAT_B2G3R3_UINT:
1993       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_3_3_2;
1994
1995    case MESA_FORMAT_R3G3B2_UINT:
1996       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1997
1998    case MESA_FORMAT_A4B4G4R4_UINT:
1999       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
2000          return GL_TRUE;
2001
2002       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
2003          return GL_TRUE;
2004       return GL_FALSE;
2005
2006    case MESA_FORMAT_R4G4B4A4_UINT:
2007       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
2008          return GL_TRUE;
2009
2010       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
2011          return GL_TRUE;
2012
2013       return GL_FALSE;
2014
2015    case MESA_FORMAT_B4G4R4A4_UINT:
2016       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
2017          !swapBytes;
2018
2019    case MESA_FORMAT_A4R4G4B4_UINT:
2020       return GL_FALSE;
2021
2022    case MESA_FORMAT_A1B5G5R5_UINT:
2023       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
2024          !swapBytes;
2025
2026    case MESA_FORMAT_B5G5R5A1_UINT:
2027       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
2028          !swapBytes;
2029
2030    case MESA_FORMAT_A1R5G5B5_UINT:
2031       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
2032          !swapBytes;
2033
2034    case MESA_FORMAT_R5G5B5A1_UINT:
2035       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
2036
2037    case MESA_FORMAT_A8B8G8R8_UINT:
2038       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
2039          return GL_TRUE;
2040
2041       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
2042          return GL_TRUE;
2043       return GL_FALSE;
2044
2045    case MESA_FORMAT_A8R8G8B8_UINT:
2046       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 &&
2047           !swapBytes)
2048          return GL_TRUE;
2049
2050       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2051           swapBytes)
2052          return GL_TRUE;
2053
2054       return GL_FALSE;
2055
2056    case MESA_FORMAT_R8G8B8A8_UINT:
2057       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2058           !swapBytes)
2059          return GL_TRUE;
2060
2061       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
2062          return GL_TRUE;
2063
2064       return GL_FALSE;
2065
2066    case MESA_FORMAT_B8G8R8A8_UINT:
2067       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2068           !swapBytes)
2069          return GL_TRUE;
2070
2071       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
2072          return GL_TRUE;
2073
2074       return GL_FALSE;
2075
2076    case MESA_FORMAT_R9G9B9E5_FLOAT:
2077       return format == GL_RGB && type == GL_UNSIGNED_INT_5_9_9_9_REV &&
2078          !swapBytes;
2079
2080    case MESA_FORMAT_R11G11B10_FLOAT:
2081       return format == GL_RGB && type == GL_UNSIGNED_INT_10F_11F_11F_REV &&
2082          !swapBytes;
2083
2084    case MESA_FORMAT_Z_FLOAT32:
2085       return format == GL_DEPTH_COMPONENT && type == GL_FLOAT && !swapBytes;
2086
2087    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
2088       return format == GL_DEPTH_STENCIL &&
2089              type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV && !swapBytes;
2090
2091    case MESA_FORMAT_B4G4R4X4_UNORM:
2092    case MESA_FORMAT_B5G5R5X1_UNORM:
2093    case MESA_FORMAT_R8G8B8X8_SNORM:
2094    case MESA_FORMAT_R8G8B8X8_SRGB:
2095    case MESA_FORMAT_X8B8G8R8_SRGB:
2096    case MESA_FORMAT_RGBX_UINT8:
2097    case MESA_FORMAT_RGBX_SINT8:
2098    case MESA_FORMAT_B10G10R10X2_UNORM:
2099    case MESA_FORMAT_R10G10B10X2_UNORM:
2100    case MESA_FORMAT_RGBX_UNORM16:
2101    case MESA_FORMAT_RGBX_SNORM16:
2102    case MESA_FORMAT_RGBX_FLOAT16:
2103    case MESA_FORMAT_RGBX_UINT16:
2104    case MESA_FORMAT_RGBX_SINT16:
2105    case MESA_FORMAT_RGBX_FLOAT32:
2106    case MESA_FORMAT_RGBX_UINT32:
2107    case MESA_FORMAT_RGBX_SINT32:
2108       return GL_FALSE;
2109
2110    case MESA_FORMAT_R10G10B10A2_UNORM:
2111       return format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2112          !swapBytes;
2113
2114    case MESA_FORMAT_G8R8_SNORM:
2115       return format == GL_RG && type == GL_BYTE && !littleEndian &&
2116          !swapBytes;
2117
2118    case MESA_FORMAT_G16R16_SNORM:
2119       return format == GL_RG && type == GL_SHORT && !littleEndian &&
2120          !swapBytes;
2121
2122    case MESA_FORMAT_B8G8R8X8_SRGB:
2123    case MESA_FORMAT_X8R8G8B8_SRGB:
2124       return GL_FALSE;
2125    default:
2126       assert(_mesa_is_format_compressed(mesa_format));
2127       if (error)
2128          *error = GL_INVALID_ENUM;
2129    }
2130    return GL_FALSE;
2131 }
2132