src/mesa/main/formats.c

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