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       return info->RedBits;
 136    case GL_GREEN_BITS:
 137    case GL_TEXTURE_GREEN_SIZE:
 138    case GL_RENDERBUFFER_GREEN_SIZE_EXT:
 139    case GL_FRAMEBUFFER_ATTACHMENT_GREEN_SIZE:
 140       return info->GreenBits;
 141    case GL_BLUE_BITS:
 142    case GL_TEXTURE_BLUE_SIZE:
 143    case GL_RENDERBUFFER_BLUE_SIZE_EXT:
 144    case GL_FRAMEBUFFER_ATTACHMENT_BLUE_SIZE:
 145       return info->BlueBits;
 146    case GL_ALPHA_BITS:
 147    case GL_TEXTURE_ALPHA_SIZE:
 148    case GL_RENDERBUFFER_ALPHA_SIZE_EXT:
 149    case GL_FRAMEBUFFER_ATTACHMENT_ALPHA_SIZE:
 150       return info->AlphaBits;
 151    case GL_TEXTURE_INTENSITY_SIZE:
 152       return info->IntensityBits;
 153    case GL_TEXTURE_LUMINANCE_SIZE:
 154       return info->LuminanceBits;
 155    case GL_INDEX_BITS:
 156       return 0;
 157    case GL_DEPTH_BITS:
 158    case GL_TEXTURE_DEPTH_SIZE_ARB:
 159    case GL_RENDERBUFFER_DEPTH_SIZE_EXT:
 160    case GL_FRAMEBUFFER_ATTACHMENT_DEPTH_SIZE:
 161       return info->DepthBits;
 162    case GL_STENCIL_BITS:
 163    case GL_TEXTURE_STENCIL_SIZE_EXT:
 164    case GL_RENDERBUFFER_STENCIL_SIZE_EXT:
 165    case GL_FRAMEBUFFER_ATTACHMENT_STENCIL_SIZE:
 166       return info->StencilBits;
 167    default:
 168       _mesa_problem(NULL, "bad pname in _mesa_get_format_bits()");
 169       return 0;
 170    }
 171 }
 172
 173
 174 GLuint
 175 _mesa_get_format_max_bits(mesa_format format)
 176 {
 177    const struct gl_format_info *info = _mesa_get_format_info(format);
 178    GLuint max = MAX2(info->RedBits, info->GreenBits);
 179    max = MAX2(max, info->BlueBits);
 180    max = MAX2(max, info->AlphaBits);
 181    max = MAX2(max, info->LuminanceBits);
 182    max = MAX2(max, info->IntensityBits);
 183    max = MAX2(max, info->DepthBits);
 184    max = MAX2(max, info->StencilBits);
 185    return max;
 186 }
 187
 188
 189 /**
 190  * Return the layout type of the given format.
 191  * The return value will be one of:
 192  *    MESA_FORMAT_LAYOUT_ARRAY
 193  *    MESA_FORMAT_LAYOUT_PACKED
 194  *    MESA_FORMAT_LAYOUT_S3TC
 195  *    MESA_FORMAT_LAYOUT_RGTC
 196  *    MESA_FORMAT_LAYOUT_FXT1
 197  *    MESA_FORMAT_LAYOUT_ETC1
 198  *    MESA_FORMAT_LAYOUT_ETC2
 199  *    MESA_FORMAT_LAYOUT_BPTC
 200  *    MESA_FORMAT_LAYOUT_ASTC
 201  *    MESA_FORMAT_LAYOUT_OTHER
 202  */
 203 extern enum mesa_format_layout
 204 _mesa_get_format_layout(mesa_format format)
 205 {
 206    const struct gl_format_info *info = _mesa_get_format_info(format);
 207    return info->Layout;
 208 }
 209
 210
 211 /**
 212  * Return the data type (or more specifically, the data representation)
 213  * for the given format.
 214  * The return value will be one of:
 215  *    GL_UNSIGNED_NORMALIZED = unsigned int representing [0,1]
 216  *    GL_SIGNED_NORMALIZED = signed int representing [-1, 1]
 217  *    GL_UNSIGNED_INT = an ordinary unsigned integer
 218  *    GL_INT = an ordinary signed integer
 219  *    GL_FLOAT = an ordinary float
 220  */
 221 GLenum
 222 _mesa_get_format_datatype(mesa_format format)
 223 {
 224    const struct gl_format_info *info = _mesa_get_format_info(format);
 225    return info->DataType;
 226 }
 227
 228 static GLenum
 229 get_base_format_for_array_format(mesa_array_format format)
 230 {
 231    uint8_t swizzle[4];
 232    int num_channels;
 233
 234    _mesa_array_format_get_swizzle(format, swizzle);
 235    num_channels = _mesa_array_format_get_num_channels(format);
 236
 237    switch (num_channels) {
 238    case 4:
 239       /* FIXME: RGBX formats have 4 channels, but their base format is GL_RGB.
 240        * This is not really a problem for now because we only create array
 241        * formats from GL format/type combinations, and these cannot specify
 242        * RGBX formats.
 243        */
 244       return GL_RGBA;
 245    case 3:
 246       return GL_RGB;
 247    case 2:
 248       if (swizzle[0] == 0 &&
 249           swizzle[1] == 0 &&
 250           swizzle[2] == 0 &&
 251           swizzle[3] == 1)
 252          return GL_LUMINANCE_ALPHA;
 253       if (swizzle[0] == 1 &&
 254           swizzle[1] == 1 &&
 255           swizzle[2] == 1 &&
 256           swizzle[3] == 0)
 257          return GL_LUMINANCE_ALPHA;
 258       if (swizzle[0] == 0 &&
 259           swizzle[1] == 1 &&
 260           swizzle[2] == 4 &&
 261           swizzle[3] == 5)
 262          return GL_RG;
 263       if (swizzle[0] == 1 &&
 264           swizzle[1] == 0 &&
 265           swizzle[2] == 4 &&
 266           swizzle[3] == 5)
 267          return GL_RG;
 268       break;
 269    case 1:
 270       if (swizzle[0] == 0 &&
 271           swizzle[1] == 0 &&
 272           swizzle[2] == 0 &&
 273           swizzle[3] == 5)
 274          return GL_LUMINANCE;
 275       if (swizzle[0] == 0 &&
 276           swizzle[1] == 0 &&
 277           swizzle[2] == 0 &&
 278           swizzle[3] == 0)
 279          return GL_INTENSITY;
 280       if (swizzle[0] <= MESA_FORMAT_SWIZZLE_W)
 281          return GL_RED;
 282       if (swizzle[1] <= MESA_FORMAT_SWIZZLE_W)
 283          return GL_GREEN;
 284       if (swizzle[2] <= MESA_FORMAT_SWIZZLE_W)
 285          return GL_BLUE;
 286       if (swizzle[3] <= MESA_FORMAT_SWIZZLE_W)
 287          return GL_ALPHA;
 288       break;
 289    }
 290
 291    unreachable("Unsupported format");
 292 }
 293
 294 /**
 295  * Return the basic format for the given type.  The result will be one of
 296  * GL_RGB, GL_RGBA, GL_ALPHA, GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_INTENSITY,
 297  * GL_YCBCR_MESA, GL_DEPTH_COMPONENT, GL_STENCIL_INDEX, GL_DEPTH_STENCIL.
 298  * This functions accepts a mesa_format or a mesa_array_format.
 299  */
 300 GLenum
 301 _mesa_get_format_base_format(uint32_t format)
 302 {
 303    if (!_mesa_format_is_mesa_array_format(format)) {
 304       const struct gl_format_info *info = _mesa_get_format_info(format);
 305       return info->BaseFormat;
 306    } else {
 307       return get_base_format_for_array_format(format);
 308    }
 309 }
 310
 311
 312 /**
 313  * Return the block size (in pixels) for the given format.  Normally
 314  * the block size is 1x1.  But compressed formats will have block sizes
 315  * of 4x4 or 8x4 pixels, etc.
 316  * \param bw  returns block width in pixels
 317  * \param bh  returns block height in pixels
 318  */
 319 void
 320 _mesa_get_format_block_size(mesa_format format, GLuint *bw, GLuint *bh)
 321 {
 322    const struct gl_format_info *info = _mesa_get_format_info(format);
 323    *bw = info->BlockWidth;
 324    *bh = info->BlockHeight;
 325 }
 326
 327
 328 /**
 329  * Returns the an array of four numbers representing the transformation
 330  * from the RGBA or SZ colorspace to the given format.  For array formats,
 331  * the i'th RGBA component is given by:
 332  *
 333  * if (swizzle[i] <= MESA_FORMAT_SWIZZLE_W)
 334  *    comp = data[swizzle[i]];
 335  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ZERO)
 336  *    comp = 0;
 337  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_ONE)
 338  *    comp = 1;
 339  * else if (swizzle[i] == MESA_FORMAT_SWIZZLE_NONE)
 340  *    // data does not contain a channel of this format
 341  *
 342  * For packed formats, the swizzle gives the number of components left of
 343  * the least significant bit.
 344  *
 345  * Compressed formats have no swizzle.
 346  */
 347 void
 348 _mesa_get_format_swizzle(mesa_format format, uint8_t swizzle_out[4])
 349 {
 350    const struct gl_format_info *info = _mesa_get_format_info(format);
 351    memcpy(swizzle_out, info->Swizzle, sizeof(info->Swizzle));
 352 }
 353
 354 mesa_array_format
 355 _mesa_array_format_flip_channels(mesa_array_format format)
 356 {
 357    int num_channels;
 358    uint8_t swizzle[4];
 359
 360    num_channels = _mesa_array_format_get_num_channels(format);
 361    _mesa_array_format_get_swizzle(format, swizzle);
 362
 363    if (num_channels == 1)
 364       return format;
 365
 366    if (num_channels == 2) {
 367       /* Assert that the swizzle makes sense for 2 channels */
 368       for (unsigned i = 0; i < 4; i++)
 369          assert(swizzle[i] != 2 && swizzle[i] != 3);
 370
 371       static const uint8_t flip_xy[6] = { 1, 0, 2, 3, 4, 5 };
 372       _mesa_array_format_set_swizzle(&format,
 373                                      flip_xy[swizzle[0]], flip_xy[swizzle[1]],
 374                                      flip_xy[swizzle[2]], flip_xy[swizzle[3]]);
 375       return format;
 376    }
 377
 378    if (num_channels == 4) {
 379       static const uint8_t flip[6] = { 3, 2, 1, 0, 4, 5 };
 380       _mesa_array_format_set_swizzle(&format,
 381                                      flip[swizzle[0]], flip[swizzle[1]],
 382                                      flip[swizzle[2]], flip[swizzle[3]]);
 383       return format;
 384    }
 385
 386    unreachable("Invalid array format");
 387 }
 388
 389 uint32_t
 390 _mesa_format_to_array_format(mesa_format format)
 391 {
 392    const struct gl_format_info *info = _mesa_get_format_info(format);
 393    if (info->ArrayFormat && !_mesa_little_endian() &&
 394        info->Layout == MESA_FORMAT_LAYOUT_PACKED)
 395       return _mesa_array_format_flip_channels(info->ArrayFormat);
 396    else
 397       return info->ArrayFormat;
 398 }
 399
 400 static struct hash_table *format_array_format_table;
 401 static once_flag format_array_format_table_exists = ONCE_FLAG_INIT;
 402
 403 static bool
 404 array_formats_equal(const void *a, const void *b)
 405 {
 406    return (intptr_t)a == (intptr_t)b;
 407 }
 408
 409 static void
 410 format_array_format_table_init(void)
 411 {
 412    const struct gl_format_info *info;
 413    mesa_array_format array_format;
 414    unsigned f;
 415
 416    format_array_format_table = _mesa_hash_table_create(NULL, NULL,
 417                                                        array_formats_equal);
 418
 419    if (!format_array_format_table) {
 420       _mesa_error_no_memory(__func__);
 421       return;
 422    }
 423
 424    for (f = 1; f < MESA_FORMAT_COUNT; ++f) {
 425       info = _mesa_get_format_info(f);
 426       if (!info->ArrayFormat)
 427          continue;
 428
 429       if (_mesa_little_endian()) {
 430          array_format = info->ArrayFormat;
 431       } else {
 432          array_format = _mesa_array_format_flip_channels(info->ArrayFormat);
 433       }
 434
 435       /* This can happen and does for some of the BGR formats.  Let's take
 436        * the first one in the list.
 437        */
 438       if (_mesa_hash_table_search_pre_hashed(format_array_format_table,
 439                                              array_format,
 440                                              (void *)(intptr_t)array_format))
 441          continue;
 442
 443       _mesa_hash_table_insert_pre_hashed(format_array_format_table,
 444                                          array_format,
 445                                          (void *)(intptr_t)array_format,
 446                                          (void *)(intptr_t)f);
 447    }
 448 }
 449
 450 mesa_format
 451 _mesa_format_from_array_format(uint32_t array_format)
 452 {
 453    struct hash_entry *entry;
 454
 455    assert(_mesa_format_is_mesa_array_format(array_format));
 456
 457    call_once(&format_array_format_table_exists, format_array_format_table_init);
 458
 459    if (!format_array_format_table) {
 460       static const once_flag once_flag_init = ONCE_FLAG_INIT;
 461       format_array_format_table_exists = once_flag_init;
 462       return MESA_FORMAT_NONE;
 463    }
 464
 465    entry = _mesa_hash_table_search_pre_hashed(format_array_format_table,
 466                                               array_format,
 467                                               (void *)(intptr_t)array_format);
 468    if (entry)
 469       return (intptr_t)entry->data;
 470    else
 471       return MESA_FORMAT_NONE;
 472 }
 473
 474 /** Is the given format a compressed format? */
 475 GLboolean
 476 _mesa_is_format_compressed(mesa_format format)
 477 {
 478    const struct gl_format_info *info = _mesa_get_format_info(format);
 479    return info->BlockWidth > 1 || info->BlockHeight > 1;
 480 }
 481
 482
 483 /**
 484  * Determine if the given format represents a packed depth/stencil buffer.
 485  */
 486 GLboolean
 487 _mesa_is_format_packed_depth_stencil(mesa_format format)
 488 {
 489    const struct gl_format_info *info = _mesa_get_format_info(format);
 490
 491    return info->BaseFormat == GL_DEPTH_STENCIL;
 492 }
 493
 494
 495 /**
 496  * Is the given format a signed/unsigned integer color format?
 497  */
 498 GLboolean
 499 _mesa_is_format_integer_color(mesa_format format)
 500 {
 501    const struct gl_format_info *info = _mesa_get_format_info(format);
 502    return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT) &&
 503       info->BaseFormat != GL_DEPTH_COMPONENT &&
 504       info->BaseFormat != GL_DEPTH_STENCIL &&
 505       info->BaseFormat != GL_STENCIL_INDEX;
 506 }
 507
 508
 509 /**
 510  * Is the given format an unsigned integer format?
 511  */
 512 GLboolean
 513 _mesa_is_format_unsigned(mesa_format format)
 514 {
 515    const struct gl_format_info *info = _mesa_get_format_info(format);
 516    return _mesa_is_type_unsigned(info->DataType);
 517 }
 518
 519
 520 /**
 521  * Does the given format store signed values?
 522  */
 523 GLboolean
 524 _mesa_is_format_signed(mesa_format format)
 525 {
 526    if (format == MESA_FORMAT_R11G11B10_FLOAT ||
 527        format == MESA_FORMAT_R9G9B9E5_FLOAT) {
 528       /* these packed float formats only store unsigned values */
 529       return GL_FALSE;
 530    }
 531    else {
 532       const struct gl_format_info *info = _mesa_get_format_info(format);
 533       return (info->DataType == GL_SIGNED_NORMALIZED ||
 534               info->DataType == GL_INT ||
 535               info->DataType == GL_FLOAT);
 536    }
 537 }
 538
 539 /**
 540  * Is the given format an integer format?
 541  */
 542 GLboolean
 543 _mesa_is_format_integer(mesa_format format)
 544 {
 545    const struct gl_format_info *info = _mesa_get_format_info(format);
 546    return (info->DataType == GL_INT || info->DataType == GL_UNSIGNED_INT);
 547 }
 548
 549
 550 /**
 551  * Return true if the given format is a color format.
 552  */
 553 GLenum
 554 _mesa_is_format_color_format(mesa_format format)
 555 {
 556    const struct gl_format_info *info = _mesa_get_format_info(format);
 557    switch (info->BaseFormat) {
 558    case GL_DEPTH_COMPONENT:
 559    case GL_STENCIL_INDEX:
 560    case GL_DEPTH_STENCIL:
 561       return false;
 562    default:
 563       return true;
 564    }
 565 }
 566
 567
 568 /**
 569  * Return color encoding for given format.
 570  * \return GL_LINEAR or GL_SRGB
 571  */
 572 GLenum
 573 _mesa_get_format_color_encoding(mesa_format format)
 574 {
 575    const struct gl_format_info *info = _mesa_get_format_info(format);
 576    return info->IsSRGBFormat ? GL_SRGB : GL_LINEAR;
 577 }
 578
 579
 580 /**
 581  * Return TRUE if format is an ETC2 compressed format specified
 582  * by GL_ARB_ES3_compatibility.
 583  */
 584 bool
 585 _mesa_is_format_etc2(mesa_format format)
 586 {
 587    switch (format) {
 588    case MESA_FORMAT_ETC2_RGB8:
 589    case MESA_FORMAT_ETC2_SRGB8:
 590    case MESA_FORMAT_ETC2_RGBA8_EAC:
 591    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 592    case MESA_FORMAT_ETC2_R11_EAC:
 593    case MESA_FORMAT_ETC2_RG11_EAC:
 594    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 595    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 596    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 597    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 598       return GL_TRUE;
 599    default:
 600       return GL_FALSE;
 601    }
 602 }
 603
 604
 605 /**
 606  * For an sRGB format, return the corresponding linear color space format.
 607  * For non-sRGB formats, return the format as-is.
 608  */
 609 mesa_format
 610 _mesa_get_srgb_format_linear(mesa_format format)
 611 {
 612    switch (format) {
 613    case MESA_FORMAT_BGR_SRGB8:
 614       format = MESA_FORMAT_BGR_UNORM8;
 615       break;
 616    case MESA_FORMAT_A8B8G8R8_SRGB:
 617       format = MESA_FORMAT_A8B8G8R8_UNORM;
 618       break;
 619    case MESA_FORMAT_B8G8R8A8_SRGB:
 620       format = MESA_FORMAT_B8G8R8A8_UNORM;
 621       break;
 622    case MESA_FORMAT_A8R8G8B8_SRGB:
 623       format = MESA_FORMAT_A8R8G8B8_UNORM;
 624       break;
 625    case MESA_FORMAT_R8G8B8A8_SRGB:
 626       format = MESA_FORMAT_R8G8B8A8_UNORM;
 627       break;
 628    case MESA_FORMAT_L_SRGB8:
 629       format = MESA_FORMAT_L_UNORM8;
 630       break;
 631    case MESA_FORMAT_L8A8_SRGB:
 632       format = MESA_FORMAT_L8A8_UNORM;
 633       break;
 634    case MESA_FORMAT_A8L8_SRGB:
 635       format = MESA_FORMAT_A8L8_UNORM;
 636       break;
 637    case MESA_FORMAT_SRGB_DXT1:
 638       format = MESA_FORMAT_RGB_DXT1;
 639       break;
 640    case MESA_FORMAT_SRGBA_DXT1:
 641       format = MESA_FORMAT_RGBA_DXT1;
 642       break;
 643    case MESA_FORMAT_SRGBA_DXT3:
 644       format = MESA_FORMAT_RGBA_DXT3;
 645       break;
 646    case MESA_FORMAT_SRGBA_DXT5:
 647       format = MESA_FORMAT_RGBA_DXT5;
 648       break;
 649    case MESA_FORMAT_R8G8B8X8_SRGB:
 650       format = MESA_FORMAT_R8G8B8X8_UNORM;
 651       break;
 652    case MESA_FORMAT_X8B8G8R8_SRGB:
 653       format = MESA_FORMAT_X8B8G8R8_UNORM;
 654       break;
 655    case MESA_FORMAT_ETC2_SRGB8:
 656       format = MESA_FORMAT_ETC2_RGB8;
 657       break;
 658    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 659       format = MESA_FORMAT_ETC2_RGBA8_EAC;
 660       break;
 661    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 662       format = MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
 663       break;
 664    case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
 665       format = MESA_FORMAT_BPTC_RGBA_UNORM;
 666       break;
 667    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_4x4:
 668       format = MESA_FORMAT_RGBA_ASTC_4x4;
 669       break;
 670    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x4:
 671       format = MESA_FORMAT_RGBA_ASTC_5x4;
 672       break;
 673    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_5x5:
 674       format = MESA_FORMAT_RGBA_ASTC_5x5;
 675       break;
 676    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x5:
 677       format = MESA_FORMAT_RGBA_ASTC_6x5;
 678       break;
 679    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_6x6:
 680       format = MESA_FORMAT_RGBA_ASTC_6x6;
 681       break;
 682    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x5:
 683       format = MESA_FORMAT_RGBA_ASTC_8x5;
 684       break;
 685    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x6:
 686       format = MESA_FORMAT_RGBA_ASTC_8x6;
 687       break;
 688    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_8x8:
 689       format = MESA_FORMAT_RGBA_ASTC_8x8;
 690       break;
 691    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x5:
 692       format = MESA_FORMAT_RGBA_ASTC_10x5;
 693       break;
 694    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x6:
 695       format = MESA_FORMAT_RGBA_ASTC_10x6;
 696       break;
 697    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x8:
 698       format = MESA_FORMAT_RGBA_ASTC_10x8;
 699       break;
 700    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_10x10:
 701       format = MESA_FORMAT_RGBA_ASTC_10x10;
 702       break;
 703    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x10:
 704       format = MESA_FORMAT_RGBA_ASTC_12x10;
 705       break;
 706    case MESA_FORMAT_SRGB8_ALPHA8_ASTC_12x12:
 707       format = MESA_FORMAT_RGBA_ASTC_12x12;
 708       break;
 709    case MESA_FORMAT_B8G8R8X8_SRGB:
 710       format = MESA_FORMAT_B8G8R8X8_UNORM;
 711       break;
 712    case MESA_FORMAT_X8R8G8B8_SRGB:
 713       format = MESA_FORMAT_X8R8G8B8_UNORM;
 714       break;
 715    default:
 716       break;
 717    }
 718    return format;
 719 }
 720
 721
 722 /**
 723  * If the given format is a compressed format, return a corresponding
 724  * uncompressed format.
 725  */
 726 mesa_format
 727 _mesa_get_uncompressed_format(mesa_format format)
 728 {
 729    switch (format) {
 730    case MESA_FORMAT_RGB_FXT1:
 731       return MESA_FORMAT_BGR_UNORM8;
 732    case MESA_FORMAT_RGBA_FXT1:
 733       return MESA_FORMAT_A8B8G8R8_UNORM;
 734    case MESA_FORMAT_RGB_DXT1:
 735    case MESA_FORMAT_SRGB_DXT1:
 736       return MESA_FORMAT_BGR_UNORM8;
 737    case MESA_FORMAT_RGBA_DXT1:
 738    case MESA_FORMAT_SRGBA_DXT1:
 739       return MESA_FORMAT_A8B8G8R8_UNORM;
 740    case MESA_FORMAT_RGBA_DXT3:
 741    case MESA_FORMAT_SRGBA_DXT3:
 742       return MESA_FORMAT_A8B8G8R8_UNORM;
 743    case MESA_FORMAT_RGBA_DXT5:
 744    case MESA_FORMAT_SRGBA_DXT5:
 745       return MESA_FORMAT_A8B8G8R8_UNORM;
 746    case MESA_FORMAT_R_RGTC1_UNORM:
 747       return MESA_FORMAT_R_UNORM8;
 748    case MESA_FORMAT_R_RGTC1_SNORM:
 749       return MESA_FORMAT_R_SNORM8;
 750    case MESA_FORMAT_RG_RGTC2_UNORM:
 751       return MESA_FORMAT_R8G8_UNORM;
 752    case MESA_FORMAT_RG_RGTC2_SNORM:
 753       return MESA_FORMAT_R8G8_SNORM;
 754    case MESA_FORMAT_L_LATC1_UNORM:
 755       return MESA_FORMAT_L_UNORM8;
 756    case MESA_FORMAT_L_LATC1_SNORM:
 757       return MESA_FORMAT_L_SNORM8;
 758    case MESA_FORMAT_LA_LATC2_UNORM:
 759       return MESA_FORMAT_L8A8_UNORM;
 760    case MESA_FORMAT_LA_LATC2_SNORM:
 761       return MESA_FORMAT_L8A8_SNORM;
 762    case MESA_FORMAT_ETC1_RGB8:
 763    case MESA_FORMAT_ETC2_RGB8:
 764    case MESA_FORMAT_ETC2_SRGB8:
 765       return MESA_FORMAT_BGR_UNORM8;
 766    case MESA_FORMAT_ETC2_RGBA8_EAC:
 767    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 768    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 769    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 770       return MESA_FORMAT_A8B8G8R8_UNORM;
 771    case MESA_FORMAT_ETC2_R11_EAC:
 772    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 773       return MESA_FORMAT_R_UNORM16;
 774    case MESA_FORMAT_ETC2_RG11_EAC:
 775    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 776       return MESA_FORMAT_R16G16_UNORM;
 777    case MESA_FORMAT_BPTC_RGBA_UNORM:
 778    case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
 779       return MESA_FORMAT_A8B8G8R8_UNORM;
 780    case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
 781    case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
 782       return MESA_FORMAT_RGB_FLOAT32;
 783    default:
 784 #ifdef DEBUG
 785       assert(!_mesa_is_format_compressed(format));
 786 #endif
 787       return format;
 788    }
 789 }
 790
 791
 792 GLuint
 793 _mesa_format_num_components(mesa_format format)
 794 {
 795    const struct gl_format_info *info = _mesa_get_format_info(format);
 796    return ((info->RedBits > 0) +
 797            (info->GreenBits > 0) +
 798            (info->BlueBits > 0) +
 799            (info->AlphaBits > 0) +
 800            (info->LuminanceBits > 0) +
 801            (info->IntensityBits > 0) +
 802            (info->DepthBits > 0) +
 803            (info->StencilBits > 0));
 804 }
 805
 806
 807 /**
 808  * Returns true if a color format has data stored in the R/G/B/A channels,
 809  * given an index from 0 to 3.
 810  */
 811 bool
 812 _mesa_format_has_color_component(mesa_format format, int component)
 813 {
 814    const struct gl_format_info *info = _mesa_get_format_info(format);
 815
 816    assert(info->BaseFormat != GL_DEPTH_COMPONENT &&
 817           info->BaseFormat != GL_DEPTH_STENCIL &&
 818           info->BaseFormat != GL_STENCIL_INDEX);
 819
 820    switch (component) {
 821    case 0:
 822       return (info->RedBits + info->IntensityBits + info->LuminanceBits) > 0;
 823    case 1:
 824       return (info->GreenBits + info->IntensityBits + info->LuminanceBits) > 0;
 825    case 2:
 826       return (info->BlueBits + info->IntensityBits + info->LuminanceBits) > 0;
 827    case 3:
 828       return (info->AlphaBits + info->IntensityBits) > 0;
 829    default:
 830       assert(!"Invalid color component: must be 0..3");
 831       return false;
 832    }
 833 }
 834
 835
 836 /**
 837  * Return number of bytes needed to store an image of the given size
 838  * in the given format.
 839  */
 840 GLuint
 841 _mesa_format_image_size(mesa_format format, GLsizei width,
 842                         GLsizei height, GLsizei depth)
 843 {
 844    const struct gl_format_info *info = _mesa_get_format_info(format);
 845    /* Strictly speaking, a conditional isn't needed here */
 846    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 847       /* compressed format (2D only for now) */
 848       const GLuint bw = info->BlockWidth, bh = info->BlockHeight;
 849       const GLuint wblocks = (width + bw - 1) / bw;
 850       const GLuint hblocks = (height + bh - 1) / bh;
 851       const GLuint sz = wblocks * hblocks * info->BytesPerBlock;
 852       return sz * depth;
 853    }
 854    else {
 855       /* non-compressed */
 856       const GLuint sz = width * height * depth * info->BytesPerBlock;
 857       return sz;
 858    }
 859 }
 860
 861
 862 /**
 863  * Same as _mesa_format_image_size() but returns a 64-bit value to
 864  * accommodate very large textures.
 865  */
 866 uint64_t
 867 _mesa_format_image_size64(mesa_format format, GLsizei width,
 868                           GLsizei height, GLsizei depth)
 869 {
 870    const struct gl_format_info *info = _mesa_get_format_info(format);
 871    /* Strictly speaking, a conditional isn't needed here */
 872    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 873       /* compressed format (2D only for now) */
 874       const uint64_t bw = info->BlockWidth, bh = info->BlockHeight;
 875       const uint64_t wblocks = (width + bw - 1) / bw;
 876       const uint64_t hblocks = (height + bh - 1) / bh;
 877       const uint64_t sz = wblocks * hblocks * info->BytesPerBlock;
 878       return sz * depth;
 879    }
 880    else {
 881       /* non-compressed */
 882       const uint64_t sz = ((uint64_t) width *
 883                            (uint64_t) height *
 884                            (uint64_t) depth *
 885                            info->BytesPerBlock);
 886       return sz;
 887    }
 888 }
 889
 890
 891
 892 GLint
 893 _mesa_format_row_stride(mesa_format format, GLsizei width)
 894 {
 895    const struct gl_format_info *info = _mesa_get_format_info(format);
 896    /* Strictly speaking, a conditional isn't needed here */
 897    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 898       /* compressed format */
 899       const GLuint bw = info->BlockWidth;
 900       const GLuint wblocks = (width + bw - 1) / bw;
 901       const GLint stride = wblocks * info->BytesPerBlock;
 902       return stride;
 903    }
 904    else {
 905       const GLint stride = width * info->BytesPerBlock;
 906       return stride;
 907    }
 908 }
 909
 910
 911
 912 /**
 913  * Return datatype and number of components per texel for the given
 914  * uncompressed mesa_format. Only used for mipmap generation code.
 915  */
 916 void
 917 _mesa_uncompressed_format_to_type_and_comps(mesa_format format,
 918                                GLenum *datatype, GLuint *comps)
 919 {
 920    switch (format) {
 921    case MESA_FORMAT_A8B8G8R8_UNORM:
 922    case MESA_FORMAT_R8G8B8A8_UNORM:
 923    case MESA_FORMAT_B8G8R8A8_UNORM:
 924    case MESA_FORMAT_A8R8G8B8_UNORM:
 925    case MESA_FORMAT_X8B8G8R8_UNORM:
 926    case MESA_FORMAT_R8G8B8X8_UNORM:
 927    case MESA_FORMAT_B8G8R8X8_UNORM:
 928    case MESA_FORMAT_X8R8G8B8_UNORM:
 929       *datatype = GL_UNSIGNED_BYTE;
 930       *comps = 4;
 931       return;
 932    case MESA_FORMAT_BGR_UNORM8:
 933    case MESA_FORMAT_RGB_UNORM8:
 934       *datatype = GL_UNSIGNED_BYTE;
 935       *comps = 3;
 936       return;
 937    case MESA_FORMAT_B5G6R5_UNORM:
 938    case MESA_FORMAT_R5G6B5_UNORM:
 939    case MESA_FORMAT_B5G6R5_UINT:
 940    case MESA_FORMAT_R5G6B5_UINT:
 941       *datatype = GL_UNSIGNED_SHORT_5_6_5;
 942       *comps = 3;
 943       return;
 944
 945    case MESA_FORMAT_B4G4R4A4_UNORM:
 946    case MESA_FORMAT_A4R4G4B4_UNORM:
 947    case MESA_FORMAT_B4G4R4X4_UNORM:
 948    case MESA_FORMAT_B4G4R4A4_UINT:
 949    case MESA_FORMAT_A4R4G4B4_UINT:
 950       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 951       *comps = 4;
 952       return;
 953
 954    case MESA_FORMAT_B5G5R5A1_UNORM:
 955    case MESA_FORMAT_A1R5G5B5_UNORM:
 956    case MESA_FORMAT_B5G5R5X1_UNORM:
 957    case MESA_FORMAT_B5G5R5A1_UINT:
 958    case MESA_FORMAT_A1R5G5B5_UINT:
 959       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 960       *comps = 4;
 961       return;
 962
 963    case MESA_FORMAT_B10G10R10A2_UNORM:
 964       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
 965       *comps = 4;
 966       return;
 967
 968    case MESA_FORMAT_A1B5G5R5_UNORM:
 969    case MESA_FORMAT_A1B5G5R5_UINT:
 970       *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
 971       *comps = 4;
 972       return;
 973
 974    case MESA_FORMAT_L4A4_UNORM:
 975       *datatype = MESA_UNSIGNED_BYTE_4_4;
 976       *comps = 2;
 977       return;
 978
 979    case MESA_FORMAT_L8A8_UNORM:
 980    case MESA_FORMAT_A8L8_UNORM:
 981    case MESA_FORMAT_R8G8_UNORM:
 982    case MESA_FORMAT_G8R8_UNORM:
 983       *datatype = GL_UNSIGNED_BYTE;
 984       *comps = 2;
 985       return;
 986
 987    case MESA_FORMAT_L16A16_UNORM:
 988    case MESA_FORMAT_A16L16_UNORM:
 989    case MESA_FORMAT_R16G16_UNORM:
 990    case MESA_FORMAT_G16R16_UNORM:
 991       *datatype = GL_UNSIGNED_SHORT;
 992       *comps = 2;
 993       return;
 994
 995    case MESA_FORMAT_R_UNORM16:
 996    case MESA_FORMAT_A_UNORM16:
 997    case MESA_FORMAT_L_UNORM16:
 998    case MESA_FORMAT_I_UNORM16:
 999       *datatype = GL_UNSIGNED_SHORT;
1000       *comps = 1;
1001       return;
1002
1003    case MESA_FORMAT_R3G3B2_UNORM:
1004    case MESA_FORMAT_R3G3B2_UINT:
1005       *datatype = GL_UNSIGNED_BYTE_2_3_3_REV;
1006       *comps = 3;
1007       return;
1008    case MESA_FORMAT_A4B4G4R4_UNORM:
1009    case MESA_FORMAT_A4B4G4R4_UINT:
1010       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1011       *comps = 4;
1012       return;
1013
1014    case MESA_FORMAT_R4G4B4A4_UNORM:
1015    case MESA_FORMAT_R4G4B4A4_UINT:
1016       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
1017       *comps = 4;
1018       return;
1019    case MESA_FORMAT_R5G5B5A1_UNORM:
1020    case MESA_FORMAT_R5G5B5A1_UINT:
1021       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
1022       *comps = 4;
1023       return;
1024    case MESA_FORMAT_A2B10G10R10_UNORM:
1025    case MESA_FORMAT_A2B10G10R10_UINT:
1026       *datatype = GL_UNSIGNED_INT_10_10_10_2;
1027       *comps = 4;
1028       return;
1029    case MESA_FORMAT_A2R10G10B10_UNORM:
1030    case MESA_FORMAT_A2R10G10B10_UINT:
1031       *datatype = GL_UNSIGNED_INT_10_10_10_2;
1032       *comps = 4;
1033       return;
1034
1035    case MESA_FORMAT_B2G3R3_UNORM:
1036    case MESA_FORMAT_B2G3R3_UINT:
1037       *datatype = GL_UNSIGNED_BYTE_3_3_2;
1038       *comps = 3;
1039       return;
1040
1041    case MESA_FORMAT_A_UNORM8:
1042    case MESA_FORMAT_L_UNORM8:
1043    case MESA_FORMAT_I_UNORM8:
1044    case MESA_FORMAT_R_UNORM8:
1045    case MESA_FORMAT_S_UINT8:
1046       *datatype = GL_UNSIGNED_BYTE;
1047       *comps = 1;
1048       return;
1049
1050    case MESA_FORMAT_YCBCR:
1051    case MESA_FORMAT_YCBCR_REV:
1052       *datatype = GL_UNSIGNED_SHORT;
1053       *comps = 2;
1054       return;
1055
1056    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1057       *datatype = GL_UNSIGNED_INT_24_8_MESA;
1058       *comps = 2;
1059       return;
1060
1061    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1062       *datatype = GL_UNSIGNED_INT_8_24_REV_MESA;
1063       *comps = 2;
1064       return;
1065
1066    case MESA_FORMAT_Z_UNORM16:
1067       *datatype = GL_UNSIGNED_SHORT;
1068       *comps = 1;
1069       return;
1070
1071    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1072       *datatype = GL_UNSIGNED_INT;
1073       *comps = 1;
1074       return;
1075
1076    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1077       *datatype = GL_UNSIGNED_INT;
1078       *comps = 1;
1079       return;
1080
1081    case MESA_FORMAT_Z_UNORM32:
1082       *datatype = GL_UNSIGNED_INT;
1083       *comps = 1;
1084       return;
1085
1086    case MESA_FORMAT_Z_FLOAT32:
1087       *datatype = GL_FLOAT;
1088       *comps = 1;
1089       return;
1090
1091    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
1092       *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
1093       *comps = 1;
1094       return;
1095
1096    case MESA_FORMAT_R_SNORM8:
1097    case MESA_FORMAT_A_SNORM8:
1098    case MESA_FORMAT_L_SNORM8:
1099    case MESA_FORMAT_I_SNORM8:
1100       *datatype = GL_BYTE;
1101       *comps = 1;
1102       return;
1103    case MESA_FORMAT_R8G8_SNORM:
1104    case MESA_FORMAT_L8A8_SNORM:
1105    case MESA_FORMAT_A8L8_SNORM:
1106       *datatype = GL_BYTE;
1107       *comps = 2;
1108       return;
1109    case MESA_FORMAT_A8B8G8R8_SNORM:
1110    case MESA_FORMAT_R8G8B8A8_SNORM:
1111    case MESA_FORMAT_X8B8G8R8_SNORM:
1112       *datatype = GL_BYTE;
1113       *comps = 4;
1114       return;
1115
1116    case MESA_FORMAT_RGBA_UNORM16:
1117       *datatype = GL_UNSIGNED_SHORT;
1118       *comps = 4;
1119       return;
1120
1121    case MESA_FORMAT_R_SNORM16:
1122    case MESA_FORMAT_A_SNORM16:
1123    case MESA_FORMAT_L_SNORM16:
1124    case MESA_FORMAT_I_SNORM16:
1125       *datatype = GL_SHORT;
1126       *comps = 1;
1127       return;
1128    case MESA_FORMAT_R16G16_SNORM:
1129    case MESA_FORMAT_LA_SNORM16:
1130       *datatype = GL_SHORT;
1131       *comps = 2;
1132       return;
1133    case MESA_FORMAT_RGB_SNORM16:
1134       *datatype = GL_SHORT;
1135       *comps = 3;
1136       return;
1137    case MESA_FORMAT_RGBA_SNORM16:
1138       *datatype = GL_SHORT;
1139       *comps = 4;
1140       return;
1141
1142    case MESA_FORMAT_BGR_SRGB8:
1143       *datatype = GL_UNSIGNED_BYTE;
1144       *comps = 3;
1145       return;
1146    case MESA_FORMAT_A8B8G8R8_SRGB:
1147    case MESA_FORMAT_B8G8R8A8_SRGB:
1148    case MESA_FORMAT_A8R8G8B8_SRGB:
1149    case MESA_FORMAT_R8G8B8A8_SRGB:
1150       *datatype = GL_UNSIGNED_BYTE;
1151       *comps = 4;
1152       return;
1153    case MESA_FORMAT_L_SRGB8:
1154       *datatype = GL_UNSIGNED_BYTE;
1155       *comps = 1;
1156       return;
1157    case MESA_FORMAT_L8A8_SRGB:
1158    case MESA_FORMAT_A8L8_SRGB:
1159       *datatype = GL_UNSIGNED_BYTE;
1160       *comps = 2;
1161       return;
1162
1163    case MESA_FORMAT_RGBA_FLOAT32:
1164       *datatype = GL_FLOAT;
1165       *comps = 4;
1166       return;
1167    case MESA_FORMAT_RGBA_FLOAT16:
1168       *datatype = GL_HALF_FLOAT_ARB;
1169       *comps = 4;
1170       return;
1171    case MESA_FORMAT_RGB_FLOAT32:
1172       *datatype = GL_FLOAT;
1173       *comps = 3;
1174       return;
1175    case MESA_FORMAT_RGB_FLOAT16:
1176       *datatype = GL_HALF_FLOAT_ARB;
1177       *comps = 3;
1178       return;
1179    case MESA_FORMAT_LA_FLOAT32:
1180    case MESA_FORMAT_RG_FLOAT32:
1181       *datatype = GL_FLOAT;
1182       *comps = 2;
1183       return;
1184    case MESA_FORMAT_LA_FLOAT16:
1185    case MESA_FORMAT_RG_FLOAT16:
1186       *datatype = GL_HALF_FLOAT_ARB;
1187       *comps = 2;
1188       return;
1189    case MESA_FORMAT_A_FLOAT32:
1190    case MESA_FORMAT_L_FLOAT32:
1191    case MESA_FORMAT_I_FLOAT32:
1192    case MESA_FORMAT_R_FLOAT32:
1193       *datatype = GL_FLOAT;
1194       *comps = 1;
1195       return;
1196    case MESA_FORMAT_A_FLOAT16:
1197    case MESA_FORMAT_L_FLOAT16:
1198    case MESA_FORMAT_I_FLOAT16:
1199    case MESA_FORMAT_R_FLOAT16:
1200       *datatype = GL_HALF_FLOAT_ARB;
1201       *comps = 1;
1202       return;
1203
1204    case MESA_FORMAT_A_UINT8:
1205    case MESA_FORMAT_L_UINT8:
1206    case MESA_FORMAT_I_UINT8:
1207       *datatype = GL_UNSIGNED_BYTE;
1208       *comps = 1;
1209       return;
1210    case MESA_FORMAT_LA_UINT8:
1211       *datatype = GL_UNSIGNED_BYTE;
1212       *comps = 2;
1213       return;
1214
1215    case MESA_FORMAT_A_UINT16:
1216    case MESA_FORMAT_L_UINT16:
1217    case MESA_FORMAT_I_UINT16:
1218       *datatype = GL_UNSIGNED_SHORT;
1219       *comps = 1;
1220       return;
1221    case MESA_FORMAT_LA_UINT16:
1222       *datatype = GL_UNSIGNED_SHORT;
1223       *comps = 2;
1224       return;
1225    case MESA_FORMAT_A_UINT32:
1226    case MESA_FORMAT_L_UINT32:
1227    case MESA_FORMAT_I_UINT32:
1228       *datatype = GL_UNSIGNED_INT;
1229       *comps = 1;
1230       return;
1231    case MESA_FORMAT_LA_UINT32:
1232       *datatype = GL_UNSIGNED_INT;
1233       *comps = 2;
1234       return;
1235    case MESA_FORMAT_A_SINT8:
1236    case MESA_FORMAT_L_SINT8:
1237    case MESA_FORMAT_I_SINT8:
1238       *datatype = GL_BYTE;
1239       *comps = 1;
1240       return;
1241    case MESA_FORMAT_LA_SINT8:
1242       *datatype = GL_BYTE;
1243       *comps = 2;
1244       return;
1245
1246    case MESA_FORMAT_A_SINT16:
1247    case MESA_FORMAT_L_SINT16:
1248    case MESA_FORMAT_I_SINT16:
1249       *datatype = GL_SHORT;
1250       *comps = 1;
1251       return;
1252    case MESA_FORMAT_LA_SINT16:
1253       *datatype = GL_SHORT;
1254       *comps = 2;
1255       return;
1256
1257    case MESA_FORMAT_A_SINT32:
1258    case MESA_FORMAT_L_SINT32:
1259    case MESA_FORMAT_I_SINT32:
1260       *datatype = GL_INT;
1261       *comps = 1;
1262       return;
1263    case MESA_FORMAT_LA_SINT32:
1264       *datatype = GL_INT;
1265       *comps = 2;
1266       return;
1267
1268    case MESA_FORMAT_R_SINT8:
1269       *datatype = GL_BYTE;
1270       *comps = 1;
1271       return;
1272    case MESA_FORMAT_RG_SINT8:
1273       *datatype = GL_BYTE;
1274       *comps = 2;
1275       return;
1276    case MESA_FORMAT_RGB_SINT8:
1277       *datatype = GL_BYTE;
1278       *comps = 3;
1279       return;
1280    case MESA_FORMAT_RGBA_SINT8:
1281       *datatype = GL_BYTE;
1282       *comps = 4;
1283       return;
1284    case MESA_FORMAT_R_SINT16:
1285       *datatype = GL_SHORT;
1286       *comps = 1;
1287       return;
1288    case MESA_FORMAT_RG_SINT16:
1289       *datatype = GL_SHORT;
1290       *comps = 2;
1291       return;
1292    case MESA_FORMAT_RGB_SINT16:
1293       *datatype = GL_SHORT;
1294       *comps = 3;
1295       return;
1296    case MESA_FORMAT_RGBA_SINT16:
1297       *datatype = GL_SHORT;
1298       *comps = 4;
1299       return;
1300    case MESA_FORMAT_R_SINT32:
1301       *datatype = GL_INT;
1302       *comps = 1;
1303       return;
1304    case MESA_FORMAT_RG_SINT32:
1305       *datatype = GL_INT;
1306       *comps = 2;
1307       return;
1308    case MESA_FORMAT_RGB_SINT32:
1309       *datatype = GL_INT;
1310       *comps = 3;
1311       return;
1312    case MESA_FORMAT_RGBA_SINT32:
1313       *datatype = GL_INT;
1314       *comps = 4;
1315       return;
1316
1317    /**
1318     * \name Non-normalized unsigned integer formats.
1319     */
1320    case MESA_FORMAT_R_UINT8:
1321       *datatype = GL_UNSIGNED_BYTE;
1322       *comps = 1;
1323       return;
1324    case MESA_FORMAT_RG_UINT8:
1325       *datatype = GL_UNSIGNED_BYTE;
1326       *comps = 2;
1327       return;
1328    case MESA_FORMAT_RGB_UINT8:
1329       *datatype = GL_UNSIGNED_BYTE;
1330       *comps = 3;
1331       return;
1332    case MESA_FORMAT_RGBA_UINT8:
1333       *datatype = GL_UNSIGNED_BYTE;
1334       *comps = 4;
1335       return;
1336    case MESA_FORMAT_R_UINT16:
1337       *datatype = GL_UNSIGNED_SHORT;
1338       *comps = 1;
1339       return;
1340    case MESA_FORMAT_RG_UINT16:
1341       *datatype = GL_UNSIGNED_SHORT;
1342       *comps = 2;
1343       return;
1344    case MESA_FORMAT_RGB_UINT16:
1345       *datatype = GL_UNSIGNED_SHORT;
1346       *comps = 3;
1347       return;
1348    case MESA_FORMAT_RGBA_UINT16:
1349       *datatype = GL_UNSIGNED_SHORT;
1350       *comps = 4;
1351       return;
1352    case MESA_FORMAT_R_UINT32:
1353       *datatype = GL_UNSIGNED_INT;
1354       *comps = 1;
1355       return;
1356    case MESA_FORMAT_RG_UINT32:
1357       *datatype = GL_UNSIGNED_INT;
1358       *comps = 2;
1359       return;
1360    case MESA_FORMAT_RGB_UINT32:
1361       *datatype = GL_UNSIGNED_INT;
1362       *comps = 3;
1363       return;
1364    case MESA_FORMAT_RGBA_UINT32:
1365       *datatype = GL_UNSIGNED_INT;
1366       *comps = 4;
1367       return;
1368
1369    case MESA_FORMAT_R9G9B9E5_FLOAT:
1370       *datatype = GL_UNSIGNED_INT_5_9_9_9_REV;
1371       *comps = 3;
1372       return;
1373
1374    case MESA_FORMAT_R11G11B10_FLOAT:
1375       *datatype = GL_UNSIGNED_INT_10F_11F_11F_REV;
1376       *comps = 3;
1377       return;
1378
1379    case MESA_FORMAT_B10G10R10A2_UINT:
1380    case MESA_FORMAT_R10G10B10A2_UINT:
1381       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1382       *comps = 4;
1383       return;
1384
1385    case MESA_FORMAT_R8G8B8X8_SRGB:
1386    case MESA_FORMAT_X8B8G8R8_SRGB:
1387    case MESA_FORMAT_RGBX_UINT8:
1388       *datatype = GL_UNSIGNED_BYTE;
1389       *comps = 4;
1390       return;
1391
1392    case MESA_FORMAT_R8G8B8X8_SNORM:
1393    case MESA_FORMAT_RGBX_SINT8:
1394       *datatype = GL_BYTE;
1395       *comps = 4;
1396       return;
1397
1398    case MESA_FORMAT_B10G10R10X2_UNORM:
1399    case MESA_FORMAT_R10G10B10X2_UNORM:
1400       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1401       *comps = 4;
1402       return;
1403
1404    case MESA_FORMAT_RGBX_UNORM16:
1405    case MESA_FORMAT_RGBX_UINT16:
1406       *datatype = GL_UNSIGNED_SHORT;
1407       *comps = 4;
1408       return;
1409
1410    case MESA_FORMAT_RGBX_SNORM16:
1411    case MESA_FORMAT_RGBX_SINT16:
1412       *datatype = GL_SHORT;
1413       *comps = 4;
1414       return;
1415
1416    case MESA_FORMAT_RGBX_FLOAT16:
1417       *datatype = GL_HALF_FLOAT;
1418       *comps = 4;
1419       return;
1420
1421    case MESA_FORMAT_RGBX_FLOAT32:
1422       *datatype = GL_FLOAT;
1423       *comps = 4;
1424       return;
1425
1426    case MESA_FORMAT_RGBX_UINT32:
1427       *datatype = GL_UNSIGNED_INT;
1428       *comps = 4;
1429       return;
1430
1431    case MESA_FORMAT_RGBX_SINT32:
1432       *datatype = GL_INT;
1433       *comps = 4;
1434       return;
1435
1436    case MESA_FORMAT_R10G10B10A2_UNORM:
1437       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1438       *comps = 4;
1439       return;
1440
1441    case MESA_FORMAT_G8R8_SNORM:
1442       *datatype = GL_BYTE;
1443       *comps = 2;
1444       return;
1445
1446    case MESA_FORMAT_G16R16_SNORM:
1447       *datatype = GL_SHORT;
1448       *comps = 2;
1449       return;
1450
1451    case MESA_FORMAT_B8G8R8X8_SRGB:
1452    case MESA_FORMAT_X8R8G8B8_SRGB:
1453       *datatype = GL_UNSIGNED_BYTE;
1454       *comps = 4;
1455       return;
1456
1457    case MESA_FORMAT_COUNT:
1458       assert(0);
1459       return;
1460    default:
1461       /* Warn if any formats are not handled */
1462       _mesa_problem(NULL, "bad format %s in _mesa_uncompressed_format_to_type_and_comps",
1463                     _mesa_get_format_name(format));
1464       assert(format == MESA_FORMAT_NONE ||
1465              _mesa_is_format_compressed(format));
1466       *datatype = 0;
1467       *comps = 1;
1468    }
1469 }
1470
1471 /**
1472  * Check if a mesa_format exactly matches a GL format/type combination
1473  * such that we can use memcpy() from one to the other.
1474  * \param mesa_format  a MESA_FORMAT_x value
1475  * \param format  the user-specified image format
1476  * \param type  the user-specified image datatype
1477  * \param swapBytes  typically the current pixel pack/unpack byteswap state
1478  * \param[out] error GL_NO_ERROR if format is an expected input.
1479  *                   GL_INVALID_ENUM if format is an unexpected input.
1480  * \return GL_TRUE if the formats match, GL_FALSE otherwise.
1481  */
1482 GLboolean
1483 _mesa_format_matches_format_and_type(mesa_format mesa_format,
1484                                      GLenum format, GLenum type,
1485                                      GLboolean swapBytes, GLenum *error)
1486 {
1487    const GLboolean littleEndian = _mesa_little_endian();
1488    if (error)
1489       *error = GL_NO_ERROR;
1490
1491    /* Note: When reading a GL format/type combination, the format lists channel
1492     * assignments from most significant channel in the type to least
1493     * significant.  A type with _REV indicates that the assignments are
1494     * swapped, so they are listed from least significant to most significant.
1495     *
1496     * Compressed formats will fall through and return GL_FALSE.
1497     *
1498     * For sanity, please keep this switch statement ordered the same as the
1499     * enums in formats.h.
1500     */
1501
1502    switch (mesa_format) {
1503
1504    case MESA_FORMAT_NONE:
1505    case MESA_FORMAT_COUNT:
1506       return GL_FALSE;
1507
1508    case MESA_FORMAT_A8B8G8R8_UNORM:
1509    case MESA_FORMAT_A8B8G8R8_SRGB:
1510       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1511          return GL_TRUE;
1512
1513       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
1514          return GL_TRUE;
1515
1516       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !littleEndian)
1517          return GL_TRUE;
1518
1519       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV
1520           && !swapBytes)
1521          return GL_TRUE;
1522
1523       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8
1524           && swapBytes)
1525          return GL_TRUE;
1526
1527       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && littleEndian)
1528          return GL_TRUE;
1529
1530       return GL_FALSE;
1531
1532    case MESA_FORMAT_R8G8B8A8_UNORM:
1533    case MESA_FORMAT_R8G8B8A8_SRGB:
1534       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1535           !swapBytes)
1536          return GL_TRUE;
1537
1538       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1539          return GL_TRUE;
1540
1541       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && littleEndian)
1542          return GL_TRUE;
1543
1544       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8 &&
1545           !swapBytes)
1546          return GL_TRUE;
1547
1548       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1549           swapBytes)
1550          return GL_TRUE;
1551
1552       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && !littleEndian)
1553          return GL_TRUE;
1554
1555       return GL_FALSE;
1556
1557    case MESA_FORMAT_B8G8R8A8_UNORM:
1558    case MESA_FORMAT_B8G8R8A8_SRGB:
1559       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1560           !swapBytes)
1561          return GL_TRUE;
1562
1563       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1564          return GL_TRUE;
1565
1566       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && littleEndian)
1567          return GL_TRUE;
1568
1569       return GL_FALSE;
1570
1571    case MESA_FORMAT_A8R8G8B8_UNORM:
1572    case MESA_FORMAT_A8R8G8B8_SRGB:
1573       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1574          return GL_TRUE;
1575
1576       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1577           swapBytes)
1578          return GL_TRUE;
1579
1580       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && !littleEndian)
1581          return GL_TRUE;
1582
1583       return GL_FALSE;
1584
1585    case MESA_FORMAT_X8B8G8R8_UNORM:
1586    case MESA_FORMAT_R8G8B8X8_UNORM:
1587       return GL_FALSE;
1588
1589    case MESA_FORMAT_B8G8R8X8_UNORM:
1590    case MESA_FORMAT_X8R8G8B8_UNORM:
1591       return GL_FALSE;
1592
1593    case MESA_FORMAT_BGR_UNORM8:
1594    case MESA_FORMAT_BGR_SRGB8:
1595       return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
1596
1597    case MESA_FORMAT_RGB_UNORM8:
1598       return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
1599
1600    case MESA_FORMAT_B5G6R5_UNORM:
1601       return ((format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) ||
1602               (format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1603               !swapBytes;
1604
1605    case MESA_FORMAT_R5G6B5_UNORM:
1606       return ((format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5) ||
1607               (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1608               !swapBytes;
1609
1610    case MESA_FORMAT_B4G4R4A4_UNORM:
1611       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1612          !swapBytes;
1613
1614    case MESA_FORMAT_A4R4G4B4_UNORM:
1615       return GL_FALSE;
1616
1617    case MESA_FORMAT_A1B5G5R5_UNORM:
1618       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1619          !swapBytes;
1620
1621    case MESA_FORMAT_B5G5R5A1_UNORM:
1622       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1623          !swapBytes;
1624
1625    case MESA_FORMAT_A1R5G5B5_UNORM:
1626       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1627          !swapBytes;
1628
1629    case MESA_FORMAT_L4A4_UNORM:
1630       return GL_FALSE;
1631    case MESA_FORMAT_L8A8_UNORM:
1632    case MESA_FORMAT_L8A8_SRGB:
1633       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
1634    case MESA_FORMAT_A8L8_UNORM:
1635    case MESA_FORMAT_A8L8_SRGB:
1636       return GL_FALSE;
1637
1638    case MESA_FORMAT_L16A16_UNORM:
1639       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian && !swapBytes;
1640    case MESA_FORMAT_A16L16_UNORM:
1641       return GL_FALSE;
1642
1643    case MESA_FORMAT_B2G3R3_UNORM:
1644       return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
1645
1646    case MESA_FORMAT_R3G3B2_UNORM:
1647       return format == GL_RGB && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1648
1649    case MESA_FORMAT_A4B4G4R4_UNORM:
1650       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1651          return GL_TRUE;
1652
1653       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1654          return GL_TRUE;
1655
1656       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1657          return GL_TRUE;
1658
1659       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1660          return GL_TRUE;
1661
1662       return GL_FALSE;
1663
1664    case MESA_FORMAT_R4G4B4A4_UNORM:
1665       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1666          return GL_TRUE;
1667
1668       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1669          return GL_TRUE;
1670
1671       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1672          return GL_TRUE;
1673
1674       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1675          return GL_TRUE;
1676
1677       return GL_FALSE;
1678
1679    case MESA_FORMAT_R5G5B5A1_UNORM:
1680       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1681
1682    case MESA_FORMAT_A2B10G10R10_UNORM:
1683       return format == GL_RGBA && type == GL_UNSIGNED_INT_10_10_10_2;
1684
1685    case MESA_FORMAT_A2B10G10R10_UINT:
1686       return format == GL_RGBA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1687
1688    case MESA_FORMAT_A2R10G10B10_UNORM:
1689       return format == GL_BGRA && type == GL_UNSIGNED_INT_10_10_10_2;
1690
1691    case MESA_FORMAT_A2R10G10B10_UINT:
1692       return format == GL_BGRA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1693
1694    case MESA_FORMAT_A_UNORM8:
1695       return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
1696    case MESA_FORMAT_A_UNORM16:
1697       return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && !swapBytes;
1698    case MESA_FORMAT_L_UNORM8:
1699    case MESA_FORMAT_L_SRGB8:
1700       return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
1701    case MESA_FORMAT_L_UNORM16:
1702       return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && !swapBytes;
1703    case MESA_FORMAT_I_UNORM8:
1704       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1705    case MESA_FORMAT_I_UNORM16:
1706       return format == GL_RED && type == GL_UNSIGNED_SHORT && !swapBytes;
1707
1708    case MESA_FORMAT_YCBCR:
1709       return format == GL_YCBCR_MESA &&
1710              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian != swapBytes) ||
1711               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian == swapBytes));
1712    case MESA_FORMAT_YCBCR_REV:
1713       return format == GL_YCBCR_MESA &&
1714              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian == swapBytes) ||
1715               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian != swapBytes));
1716
1717    case MESA_FORMAT_R_UNORM8:
1718       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1719    case MESA_FORMAT_R8G8_UNORM:
1720       return format == GL_RG && type == GL_UNSIGNED_BYTE && littleEndian;
1721    case MESA_FORMAT_G8R8_UNORM:
1722       return GL_FALSE;
1723
1724    case MESA_FORMAT_R_UNORM16:
1725       return format == GL_RED && type == GL_UNSIGNED_SHORT &&
1726          !swapBytes;
1727    case MESA_FORMAT_R16G16_UNORM:
1728       return format == GL_RG && type == GL_UNSIGNED_SHORT && littleEndian &&
1729          !swapBytes;
1730    case MESA_FORMAT_G16R16_UNORM:
1731       return GL_FALSE;
1732
1733    case MESA_FORMAT_B10G10R10A2_UNORM:
1734       return format == GL_BGRA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1735          !swapBytes;
1736
1737    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1738       return format == GL_DEPTH_STENCIL && type == GL_UNSIGNED_INT_24_8 &&
1739          !swapBytes;
1740    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1741    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1742       return GL_FALSE;
1743
1744    case MESA_FORMAT_Z_UNORM16:
1745       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT &&
1746          !swapBytes;
1747
1748    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1749       return GL_FALSE;
1750
1751    case MESA_FORMAT_Z_UNORM32:
1752       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT &&
1753          !swapBytes;
1754
1755    case MESA_FORMAT_S_UINT8:
1756       return format == GL_STENCIL_INDEX && type == GL_UNSIGNED_BYTE;
1757
1758    case MESA_FORMAT_RGBA_FLOAT32:
1759       return format == GL_RGBA && type == GL_FLOAT && !swapBytes;
1760    case MESA_FORMAT_RGBA_FLOAT16:
1761       return format == GL_RGBA && type == GL_HALF_FLOAT && !swapBytes;
1762
1763    case MESA_FORMAT_RGB_FLOAT32:
1764       return format == GL_RGB && type == GL_FLOAT && !swapBytes;
1765    case MESA_FORMAT_RGB_FLOAT16:
1766       return format == GL_RGB && type == GL_HALF_FLOAT && !swapBytes;
1767
1768    case MESA_FORMAT_A_FLOAT32:
1769       return format == GL_ALPHA && type == GL_FLOAT && !swapBytes;
1770    case MESA_FORMAT_A_FLOAT16:
1771       return format == GL_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1772
1773    case MESA_FORMAT_L_FLOAT32:
1774       return format == GL_LUMINANCE && type == GL_FLOAT && !swapBytes;
1775    case MESA_FORMAT_L_FLOAT16:
1776       return format == GL_LUMINANCE && type == GL_HALF_FLOAT && !swapBytes;
1777
1778    case MESA_FORMAT_LA_FLOAT32:
1779       return format == GL_LUMINANCE_ALPHA && type == GL_FLOAT && !swapBytes;
1780    case MESA_FORMAT_LA_FLOAT16:
1781       return format == GL_LUMINANCE_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1782
1783    case MESA_FORMAT_I_FLOAT32:
1784       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1785    case MESA_FORMAT_I_FLOAT16:
1786       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1787
1788    case MESA_FORMAT_R_FLOAT32:
1789       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1790    case MESA_FORMAT_R_FLOAT16:
1791       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1792
1793    case MESA_FORMAT_RG_FLOAT32:
1794       return format == GL_RG && type == GL_FLOAT && !swapBytes;
1795    case MESA_FORMAT_RG_FLOAT16:
1796       return format == GL_RG && type == GL_HALF_FLOAT && !swapBytes;
1797
1798    case MESA_FORMAT_A_UINT8:
1799       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_BYTE;
1800    case MESA_FORMAT_A_UINT16:
1801       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_SHORT &&
1802              !swapBytes;
1803    case MESA_FORMAT_A_UINT32:
1804       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_INT &&
1805              !swapBytes;
1806    case MESA_FORMAT_A_SINT8:
1807       return format == GL_ALPHA_INTEGER && type == GL_BYTE;
1808    case MESA_FORMAT_A_SINT16:
1809       return format == GL_ALPHA_INTEGER && type == GL_SHORT && !swapBytes;
1810    case MESA_FORMAT_A_SINT32:
1811       return format == GL_ALPHA_INTEGER && type == GL_INT && !swapBytes;
1812
1813    case MESA_FORMAT_I_UINT8:
1814       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1815    case MESA_FORMAT_I_UINT16:
1816       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1817    case MESA_FORMAT_I_UINT32:
1818       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1819    case MESA_FORMAT_I_SINT8:
1820       return format == GL_RED_INTEGER && type == GL_BYTE;
1821    case MESA_FORMAT_I_SINT16:
1822       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1823    case MESA_FORMAT_I_SINT32:
1824       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1825
1826    case MESA_FORMAT_L_UINT8:
1827       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_BYTE;
1828    case MESA_FORMAT_L_UINT16:
1829       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_SHORT &&
1830              !swapBytes;
1831    case MESA_FORMAT_L_UINT32:
1832       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_INT &&
1833              !swapBytes;
1834    case MESA_FORMAT_L_SINT8:
1835       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_BYTE;
1836    case MESA_FORMAT_L_SINT16:
1837       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_SHORT &&
1838              !swapBytes;
1839    case MESA_FORMAT_L_SINT32:
1840       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_INT && !swapBytes;
1841
1842    case MESA_FORMAT_LA_UINT8:
1843       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1844              type == GL_UNSIGNED_BYTE && !swapBytes;
1845    case MESA_FORMAT_LA_UINT16:
1846       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1847              type == GL_UNSIGNED_SHORT && !swapBytes;
1848    case MESA_FORMAT_LA_UINT32:
1849       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1850              type == GL_UNSIGNED_INT && !swapBytes;
1851    case MESA_FORMAT_LA_SINT8:
1852       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_BYTE &&
1853              !swapBytes;
1854    case MESA_FORMAT_LA_SINT16:
1855       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_SHORT &&
1856              !swapBytes;
1857    case MESA_FORMAT_LA_SINT32:
1858       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_INT &&
1859              !swapBytes;
1860
1861    case MESA_FORMAT_R_SINT8:
1862       return format == GL_RED_INTEGER && type == GL_BYTE;
1863    case MESA_FORMAT_RG_SINT8:
1864       return format == GL_RG_INTEGER && type == GL_BYTE && !swapBytes;
1865    case MESA_FORMAT_RGB_SINT8:
1866       return format == GL_RGB_INTEGER && type == GL_BYTE && !swapBytes;
1867    case MESA_FORMAT_RGBA_SINT8:
1868       return format == GL_RGBA_INTEGER && type == GL_BYTE && !swapBytes;
1869    case MESA_FORMAT_R_SINT16:
1870       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1871    case MESA_FORMAT_RG_SINT16:
1872       return format == GL_RG_INTEGER && type == GL_SHORT && !swapBytes;
1873    case MESA_FORMAT_RGB_SINT16:
1874       return format == GL_RGB_INTEGER && type == GL_SHORT && !swapBytes;
1875    case MESA_FORMAT_RGBA_SINT16:
1876       return format == GL_RGBA_INTEGER && type == GL_SHORT && !swapBytes;
1877    case MESA_FORMAT_R_SINT32:
1878       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1879    case MESA_FORMAT_RG_SINT32:
1880       return format == GL_RG_INTEGER && type == GL_INT && !swapBytes;
1881    case MESA_FORMAT_RGB_SINT32:
1882       return format == GL_RGB_INTEGER && type == GL_INT && !swapBytes;
1883    case MESA_FORMAT_RGBA_SINT32:
1884       return format == GL_RGBA_INTEGER && type == GL_INT && !swapBytes;
1885
1886    case MESA_FORMAT_R_UINT8:
1887       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1888    case MESA_FORMAT_RG_UINT8:
1889       return format == GL_RG_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1890    case MESA_FORMAT_RGB_UINT8:
1891       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1892    case MESA_FORMAT_RGBA_UINT8:
1893       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_BYTE &&
1894              !swapBytes;
1895    case MESA_FORMAT_R_UINT16:
1896       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT &&
1897              !swapBytes;
1898    case MESA_FORMAT_RG_UINT16:
1899       return format == GL_RG_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1900    case MESA_FORMAT_RGB_UINT16:
1901       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT &&
1902              !swapBytes;
1903    case MESA_FORMAT_RGBA_UINT16:
1904       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT &&
1905              !swapBytes;
1906    case MESA_FORMAT_R_UINT32:
1907       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1908    case MESA_FORMAT_RG_UINT32:
1909       return format == GL_RG_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1910    case MESA_FORMAT_RGB_UINT32:
1911       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1912    case MESA_FORMAT_RGBA_UINT32:
1913       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1914
1915    case MESA_FORMAT_R_SNORM8:
1916       return format == GL_RED && type == GL_BYTE;
1917    case MESA_FORMAT_R8G8_SNORM:
1918       return format == GL_RG && type == GL_BYTE && littleEndian &&
1919              !swapBytes;
1920    case MESA_FORMAT_X8B8G8R8_SNORM:
1921       return GL_FALSE;
1922
1923    case MESA_FORMAT_A8B8G8R8_SNORM:
1924       if (format == GL_RGBA && type == GL_BYTE && !littleEndian)
1925          return GL_TRUE;
1926
1927       if (format == GL_ABGR_EXT && type == GL_BYTE && littleEndian)
1928          return GL_TRUE;
1929
1930       return GL_FALSE;
1931
1932    case MESA_FORMAT_R8G8B8A8_SNORM:
1933       if (format == GL_RGBA && type == GL_BYTE && littleEndian)
1934          return GL_TRUE;
1935
1936       if (format == GL_ABGR_EXT && type == GL_BYTE && !littleEndian)
1937          return GL_TRUE;
1938
1939       return GL_FALSE;
1940
1941    case MESA_FORMAT_R_SNORM16:
1942       return format == GL_RED && type == GL_SHORT &&
1943              !swapBytes;
1944    case MESA_FORMAT_R16G16_SNORM:
1945       return format == GL_RG && type == GL_SHORT && littleEndian && !swapBytes;
1946    case MESA_FORMAT_RGB_SNORM16:
1947       return format == GL_RGB && type == GL_SHORT && !swapBytes;
1948    case MESA_FORMAT_RGBA_SNORM16:
1949       return format == GL_RGBA && type == GL_SHORT && !swapBytes;
1950    case MESA_FORMAT_RGBA_UNORM16:
1951       return format == GL_RGBA && type == GL_UNSIGNED_SHORT &&
1952              !swapBytes;
1953
1954    case MESA_FORMAT_A_SNORM8:
1955       return format == GL_ALPHA && type == GL_BYTE;
1956    case MESA_FORMAT_L_SNORM8:
1957       return format == GL_LUMINANCE && type == GL_BYTE;
1958    case MESA_FORMAT_L8A8_SNORM:
1959       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1960              littleEndian && !swapBytes;
1961    case MESA_FORMAT_A8L8_SNORM:
1962       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1963              !littleEndian && !swapBytes;
1964    case MESA_FORMAT_I_SNORM8:
1965       return format == GL_RED && type == GL_BYTE;
1966    case MESA_FORMAT_A_SNORM16:
1967       return format == GL_ALPHA && type == GL_SHORT && !swapBytes;
1968    case MESA_FORMAT_L_SNORM16:
1969       return format == GL_LUMINANCE && type == GL_SHORT && !swapBytes;
1970    case MESA_FORMAT_LA_SNORM16:
1971       return format == GL_LUMINANCE_ALPHA && type == GL_SHORT &&
1972              littleEndian && !swapBytes;
1973    case MESA_FORMAT_I_SNORM16:
1974       return format == GL_RED && type == GL_SHORT && littleEndian &&
1975              !swapBytes;
1976
1977    case MESA_FORMAT_B10G10R10A2_UINT:
1978       return (format == GL_BGRA_INTEGER_EXT &&
1979               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1980               !swapBytes);
1981
1982    case MESA_FORMAT_R10G10B10A2_UINT:
1983       return (format == GL_RGBA_INTEGER_EXT &&
1984               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1985               !swapBytes);
1986
1987    case MESA_FORMAT_B5G6R5_UINT:
1988       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5;
1989
1990    case MESA_FORMAT_R5G6B5_UINT:
1991       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5_REV;
1992
1993    case MESA_FORMAT_B2G3R3_UINT:
1994       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_3_3_2;
1995
1996    case MESA_FORMAT_R3G3B2_UINT:
1997       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1998
1999    case MESA_FORMAT_A4B4G4R4_UINT:
2000       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
2001          return GL_TRUE;
2002
2003       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
2004          return GL_TRUE;
2005       return GL_FALSE;
2006
2007    case MESA_FORMAT_R4G4B4A4_UINT:
2008       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
2009          return GL_TRUE;
2010
2011       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
2012          return GL_TRUE;
2013
2014       return GL_FALSE;
2015
2016    case MESA_FORMAT_B4G4R4A4_UINT:
2017       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
2018          !swapBytes;
2019
2020    case MESA_FORMAT_A4R4G4B4_UINT:
2021       return GL_FALSE;
2022
2023    case MESA_FORMAT_A1B5G5R5_UINT:
2024       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
2025          !swapBytes;
2026
2027    case MESA_FORMAT_B5G5R5A1_UINT:
2028       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
2029          !swapBytes;
2030
2031    case MESA_FORMAT_A1R5G5B5_UINT:
2032       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
2033          !swapBytes;
2034
2035    case MESA_FORMAT_R5G5B5A1_UINT:
2036       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
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_R10G10B10X2_UNORM:
2062    case MESA_FORMAT_RGBX_UNORM16:
2063    case MESA_FORMAT_RGBX_SNORM16:
2064    case MESA_FORMAT_RGBX_FLOAT16:
2065    case MESA_FORMAT_RGBX_UINT16:
2066    case MESA_FORMAT_RGBX_SINT16:
2067    case MESA_FORMAT_RGBX_FLOAT32:
2068    case MESA_FORMAT_RGBX_UINT32:
2069    case MESA_FORMAT_RGBX_SINT32:
2070       return GL_FALSE;
2071
2072    case MESA_FORMAT_R10G10B10A2_UNORM:
2073       return format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2074          !swapBytes;
2075
2076    case MESA_FORMAT_G8R8_SNORM:
2077       return format == GL_RG && type == GL_BYTE && !littleEndian &&
2078          !swapBytes;
2079
2080    case MESA_FORMAT_G16R16_SNORM:
2081       return format == GL_RG && type == GL_SHORT && !littleEndian &&
2082          !swapBytes;
2083
2084    case MESA_FORMAT_B8G8R8X8_SRGB:
2085    case MESA_FORMAT_X8R8G8B8_SRGB:
2086       return GL_FALSE;
2087    default:
2088       assert(_mesa_is_format_compressed(mesa_format));
2089       if (error)
2090          *error = GL_INVALID_ENUM;
2091    }
2092    return GL_FALSE;
2093 }
2094