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    case MESA_FORMAT_ATC_RGB:
 716       return MESA_FORMAT_BGR_UNORM8;
 717    case MESA_FORMAT_ETC2_RGBA8_EAC:
 718    case MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC:
 719    case MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1:
 720    case MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1:
 721    case MESA_FORMAT_ATC_RGBA_EXPLICIT:
 722    case MESA_FORMAT_ATC_RGBA_INTERPOLATED:
 723       return MESA_FORMAT_A8B8G8R8_UNORM;
 724    case MESA_FORMAT_ETC2_R11_EAC:
 725    case MESA_FORMAT_ETC2_SIGNED_R11_EAC:
 726       return MESA_FORMAT_R_UNORM16;
 727    case MESA_FORMAT_ETC2_RG11_EAC:
 728    case MESA_FORMAT_ETC2_SIGNED_RG11_EAC:
 729       return MESA_FORMAT_R16G16_UNORM;
 730    case MESA_FORMAT_BPTC_RGBA_UNORM:
 731    case MESA_FORMAT_BPTC_SRGB_ALPHA_UNORM:
 732       return MESA_FORMAT_A8B8G8R8_UNORM;
 733    case MESA_FORMAT_BPTC_RGB_UNSIGNED_FLOAT:
 734    case MESA_FORMAT_BPTC_RGB_SIGNED_FLOAT:
 735       return MESA_FORMAT_RGB_FLOAT32;
 736    default:
 737 #ifdef DEBUG
 738       assert(!_mesa_is_format_compressed(format));
 739 #endif
 740       return format;
 741    }
 742 }
 743
 744
 745 GLuint
 746 _mesa_format_num_components(mesa_format format)
 747 {
 748    const struct gl_format_info *info = _mesa_get_format_info(format);
 749    return ((info->RedBits > 0) +
 750            (info->GreenBits > 0) +
 751            (info->BlueBits > 0) +
 752            (info->AlphaBits > 0) +
 753            (info->LuminanceBits > 0) +
 754            (info->IntensityBits > 0) +
 755            (info->DepthBits > 0) +
 756            (info->StencilBits > 0));
 757 }
 758
 759
 760 /**
 761  * Returns true if a color format has data stored in the R/G/B/A channels,
 762  * given an index from 0 to 3.
 763  */
 764 bool
 765 _mesa_format_has_color_component(mesa_format format, int component)
 766 {
 767    const struct gl_format_info *info = _mesa_get_format_info(format);
 768
 769    assert(info->BaseFormat != GL_DEPTH_COMPONENT &&
 770           info->BaseFormat != GL_DEPTH_STENCIL &&
 771           info->BaseFormat != GL_STENCIL_INDEX);
 772
 773    switch (component) {
 774    case 0:
 775       return (info->RedBits + info->IntensityBits + info->LuminanceBits) > 0;
 776    case 1:
 777       return (info->GreenBits + info->IntensityBits + info->LuminanceBits) > 0;
 778    case 2:
 779       return (info->BlueBits + info->IntensityBits + info->LuminanceBits) > 0;
 780    case 3:
 781       return (info->AlphaBits + info->IntensityBits) > 0;
 782    default:
 783       assert(!"Invalid color component: must be 0..3");
 784       return false;
 785    }
 786 }
 787
 788
 789 /**
 790  * Return number of bytes needed to store an image of the given size
 791  * in the given format.
 792  */
 793 GLuint
 794 _mesa_format_image_size(mesa_format format, GLsizei width,
 795                         GLsizei height, GLsizei depth)
 796 {
 797    const struct gl_format_info *info = _mesa_get_format_info(format);
 798    GLuint sz;
 799    /* Strictly speaking, a conditional isn't needed here */
 800    if (info->BlockWidth > 1 || info->BlockHeight > 1 || info->BlockDepth > 1) {
 801       /* compressed format (2D only for now) */
 802       const GLuint bw = info->BlockWidth;
 803       const GLuint bh = info->BlockHeight;
 804       const GLuint bd = info->BlockDepth;
 805       const GLuint wblocks = (width + bw - 1) / bw;
 806       const GLuint hblocks = (height + bh - 1) / bh;
 807       const GLuint dblocks = (depth + bd - 1) / bd;
 808       sz = wblocks * hblocks * dblocks * info->BytesPerBlock;
 809    } else
 810       /* non-compressed */
 811       sz = width * height * depth * info->BytesPerBlock;
 812
 813    return sz;
 814 }
 815
 816
 817 /**
 818  * Same as _mesa_format_image_size() but returns a 64-bit value to
 819  * accommodate very large textures.
 820  */
 821 uint64_t
 822 _mesa_format_image_size64(mesa_format format, GLsizei width,
 823                           GLsizei height, GLsizei depth)
 824 {
 825    const struct gl_format_info *info = _mesa_get_format_info(format);
 826    uint64_t sz;
 827    /* Strictly speaking, a conditional isn't needed here */
 828    if (info->BlockWidth > 1 || info->BlockHeight > 1 || info->BlockDepth > 1) {
 829       /* compressed format (2D only for now) */
 830       const uint64_t bw = info->BlockWidth;
 831       const uint64_t bh = info->BlockHeight;
 832       const uint64_t bd = info->BlockDepth;
 833       const uint64_t wblocks = (width + bw - 1) / bw;
 834       const uint64_t hblocks = (height + bh - 1) / bh;
 835       const uint64_t dblocks = (depth + bd - 1) / bd;
 836       sz = wblocks * hblocks * dblocks * info->BytesPerBlock;
 837    } else
 838       /* non-compressed */
 839       sz = ((uint64_t) width * (uint64_t) height *
 840             (uint64_t) depth * info->BytesPerBlock);
 841
 842    return sz;
 843 }
 844
 845
 846
 847 GLint
 848 _mesa_format_row_stride(mesa_format format, GLsizei width)
 849 {
 850    const struct gl_format_info *info = _mesa_get_format_info(format);
 851    /* Strictly speaking, a conditional isn't needed here */
 852    if (info->BlockWidth > 1 || info->BlockHeight > 1) {
 853       /* compressed format */
 854       const GLuint bw = info->BlockWidth;
 855       const GLuint wblocks = (width + bw - 1) / bw;
 856       const GLint stride = wblocks * info->BytesPerBlock;
 857       return stride;
 858    }
 859    else {
 860       const GLint stride = width * info->BytesPerBlock;
 861       return stride;
 862    }
 863 }
 864
 865
 866
 867 /**
 868  * Return datatype and number of components per texel for the given
 869  * uncompressed mesa_format. Only used for mipmap generation code.
 870  */
 871 void
 872 _mesa_uncompressed_format_to_type_and_comps(mesa_format format,
 873                                GLenum *datatype, GLuint *comps)
 874 {
 875    switch (format) {
 876    case MESA_FORMAT_A8B8G8R8_UNORM:
 877    case MESA_FORMAT_R8G8B8A8_UNORM:
 878    case MESA_FORMAT_B8G8R8A8_UNORM:
 879    case MESA_FORMAT_A8R8G8B8_UNORM:
 880    case MESA_FORMAT_X8B8G8R8_UNORM:
 881    case MESA_FORMAT_R8G8B8X8_UNORM:
 882    case MESA_FORMAT_B8G8R8X8_UNORM:
 883    case MESA_FORMAT_X8R8G8B8_UNORM:
 884    case MESA_FORMAT_A8B8G8R8_UINT:
 885    case MESA_FORMAT_R8G8B8A8_UINT:
 886    case MESA_FORMAT_B8G8R8A8_UINT:
 887    case MESA_FORMAT_A8R8G8B8_UINT:
 888       *datatype = GL_UNSIGNED_BYTE;
 889       *comps = 4;
 890       return;
 891    case MESA_FORMAT_BGR_UNORM8:
 892    case MESA_FORMAT_RGB_UNORM8:
 893       *datatype = GL_UNSIGNED_BYTE;
 894       *comps = 3;
 895       return;
 896    case MESA_FORMAT_B5G6R5_UNORM:
 897    case MESA_FORMAT_R5G6B5_UNORM:
 898    case MESA_FORMAT_B5G6R5_UINT:
 899    case MESA_FORMAT_R5G6B5_UINT:
 900       *datatype = GL_UNSIGNED_SHORT_5_6_5;
 901       *comps = 3;
 902       return;
 903
 904    case MESA_FORMAT_B4G4R4A4_UNORM:
 905    case MESA_FORMAT_A4R4G4B4_UNORM:
 906    case MESA_FORMAT_B4G4R4X4_UNORM:
 907    case MESA_FORMAT_B4G4R4A4_UINT:
 908    case MESA_FORMAT_A4R4G4B4_UINT:
 909       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 910       *comps = 4;
 911       return;
 912
 913    case MESA_FORMAT_B5G5R5A1_UNORM:
 914    case MESA_FORMAT_A1R5G5B5_UNORM:
 915    case MESA_FORMAT_B5G5R5X1_UNORM:
 916    case MESA_FORMAT_B5G5R5A1_UINT:
 917    case MESA_FORMAT_A1R5G5B5_UINT:
 918       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 919       *comps = 4;
 920       return;
 921
 922    case MESA_FORMAT_B10G10R10A2_UNORM:
 923       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
 924       *comps = 4;
 925       return;
 926
 927    case MESA_FORMAT_A1B5G5R5_UNORM:
 928    case MESA_FORMAT_A1B5G5R5_UINT:
 929    case MESA_FORMAT_X1B5G5R5_UNORM:
 930       *datatype = GL_UNSIGNED_SHORT_5_5_5_1;
 931       *comps = 4;
 932       return;
 933
 934    case MESA_FORMAT_L4A4_UNORM:
 935       *datatype = MESA_UNSIGNED_BYTE_4_4;
 936       *comps = 2;
 937       return;
 938
 939    case MESA_FORMAT_L8A8_UNORM:
 940    case MESA_FORMAT_A8L8_UNORM:
 941    case MESA_FORMAT_R8G8_UNORM:
 942    case MESA_FORMAT_G8R8_UNORM:
 943       *datatype = GL_UNSIGNED_BYTE;
 944       *comps = 2;
 945       return;
 946
 947    case MESA_FORMAT_L16A16_UNORM:
 948    case MESA_FORMAT_A16L16_UNORM:
 949    case MESA_FORMAT_R16G16_UNORM:
 950    case MESA_FORMAT_G16R16_UNORM:
 951       *datatype = GL_UNSIGNED_SHORT;
 952       *comps = 2;
 953       return;
 954
 955    case MESA_FORMAT_R_UNORM16:
 956    case MESA_FORMAT_A_UNORM16:
 957    case MESA_FORMAT_L_UNORM16:
 958    case MESA_FORMAT_I_UNORM16:
 959       *datatype = GL_UNSIGNED_SHORT;
 960       *comps = 1;
 961       return;
 962
 963    case MESA_FORMAT_R3G3B2_UNORM:
 964    case MESA_FORMAT_R3G3B2_UINT:
 965       *datatype = GL_UNSIGNED_BYTE_2_3_3_REV;
 966       *comps = 3;
 967       return;
 968    case MESA_FORMAT_A4B4G4R4_UNORM:
 969    case MESA_FORMAT_A4B4G4R4_UINT:
 970       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 971       *comps = 4;
 972       return;
 973
 974    case MESA_FORMAT_R4G4B4A4_UNORM:
 975    case MESA_FORMAT_R4G4B4A4_UINT:
 976       *datatype = GL_UNSIGNED_SHORT_4_4_4_4;
 977       *comps = 4;
 978       return;
 979    case MESA_FORMAT_R5G5B5A1_UNORM:
 980    case MESA_FORMAT_R5G5B5A1_UINT:
 981       *datatype = GL_UNSIGNED_SHORT_1_5_5_5_REV;
 982       *comps = 4;
 983       return;
 984    case MESA_FORMAT_A2B10G10R10_UNORM:
 985    case MESA_FORMAT_A2B10G10R10_UINT:
 986       *datatype = GL_UNSIGNED_INT_10_10_10_2;
 987       *comps = 4;
 988       return;
 989    case MESA_FORMAT_A2R10G10B10_UNORM:
 990    case MESA_FORMAT_A2R10G10B10_UINT:
 991       *datatype = GL_UNSIGNED_INT_10_10_10_2;
 992       *comps = 4;
 993       return;
 994
 995    case MESA_FORMAT_B2G3R3_UNORM:
 996    case MESA_FORMAT_B2G3R3_UINT:
 997       *datatype = GL_UNSIGNED_BYTE_3_3_2;
 998       *comps = 3;
 999       return;
1000
1001    case MESA_FORMAT_A_UNORM8:
1002    case MESA_FORMAT_L_UNORM8:
1003    case MESA_FORMAT_I_UNORM8:
1004    case MESA_FORMAT_R_UNORM8:
1005    case MESA_FORMAT_S_UINT8:
1006       *datatype = GL_UNSIGNED_BYTE;
1007       *comps = 1;
1008       return;
1009
1010    case MESA_FORMAT_YCBCR:
1011    case MESA_FORMAT_YCBCR_REV:
1012       *datatype = GL_UNSIGNED_SHORT;
1013       *comps = 2;
1014       return;
1015
1016    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1017       *datatype = GL_UNSIGNED_INT_24_8_MESA;
1018       *comps = 2;
1019       return;
1020
1021    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1022       *datatype = GL_UNSIGNED_INT_8_24_REV_MESA;
1023       *comps = 2;
1024       return;
1025
1026    case MESA_FORMAT_Z_UNORM16:
1027       *datatype = GL_UNSIGNED_SHORT;
1028       *comps = 1;
1029       return;
1030
1031    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1032       *datatype = GL_UNSIGNED_INT;
1033       *comps = 1;
1034       return;
1035
1036    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1037       *datatype = GL_UNSIGNED_INT;
1038       *comps = 1;
1039       return;
1040
1041    case MESA_FORMAT_Z_UNORM32:
1042       *datatype = GL_UNSIGNED_INT;
1043       *comps = 1;
1044       return;
1045
1046    case MESA_FORMAT_Z_FLOAT32:
1047       *datatype = GL_FLOAT;
1048       *comps = 1;
1049       return;
1050
1051    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
1052       *datatype = GL_FLOAT_32_UNSIGNED_INT_24_8_REV;
1053       *comps = 1;
1054       return;
1055
1056    case MESA_FORMAT_R_SNORM8:
1057    case MESA_FORMAT_A_SNORM8:
1058    case MESA_FORMAT_L_SNORM8:
1059    case MESA_FORMAT_I_SNORM8:
1060       *datatype = GL_BYTE;
1061       *comps = 1;
1062       return;
1063    case MESA_FORMAT_R8G8_SNORM:
1064    case MESA_FORMAT_L8A8_SNORM:
1065    case MESA_FORMAT_A8L8_SNORM:
1066       *datatype = GL_BYTE;
1067       *comps = 2;
1068       return;
1069    case MESA_FORMAT_A8B8G8R8_SNORM:
1070    case MESA_FORMAT_R8G8B8A8_SNORM:
1071    case MESA_FORMAT_X8B8G8R8_SNORM:
1072       *datatype = GL_BYTE;
1073       *comps = 4;
1074       return;
1075
1076    case MESA_FORMAT_RGBA_UNORM16:
1077       *datatype = GL_UNSIGNED_SHORT;
1078       *comps = 4;
1079       return;
1080
1081    case MESA_FORMAT_R_SNORM16:
1082    case MESA_FORMAT_A_SNORM16:
1083    case MESA_FORMAT_L_SNORM16:
1084    case MESA_FORMAT_I_SNORM16:
1085       *datatype = GL_SHORT;
1086       *comps = 1;
1087       return;
1088    case MESA_FORMAT_R16G16_SNORM:
1089    case MESA_FORMAT_LA_SNORM16:
1090       *datatype = GL_SHORT;
1091       *comps = 2;
1092       return;
1093    case MESA_FORMAT_RGB_SNORM16:
1094       *datatype = GL_SHORT;
1095       *comps = 3;
1096       return;
1097    case MESA_FORMAT_RGBA_SNORM16:
1098       *datatype = GL_SHORT;
1099       *comps = 4;
1100       return;
1101
1102    case MESA_FORMAT_BGR_SRGB8:
1103       *datatype = GL_UNSIGNED_BYTE;
1104       *comps = 3;
1105       return;
1106    case MESA_FORMAT_A8B8G8R8_SRGB:
1107    case MESA_FORMAT_B8G8R8A8_SRGB:
1108    case MESA_FORMAT_A8R8G8B8_SRGB:
1109    case MESA_FORMAT_R8G8B8A8_SRGB:
1110       *datatype = GL_UNSIGNED_BYTE;
1111       *comps = 4;
1112       return;
1113    case MESA_FORMAT_L_SRGB8:
1114    case MESA_FORMAT_R_SRGB8:
1115       *datatype = GL_UNSIGNED_BYTE;
1116       *comps = 1;
1117       return;
1118    case MESA_FORMAT_L8A8_SRGB:
1119    case MESA_FORMAT_A8L8_SRGB:
1120       *datatype = GL_UNSIGNED_BYTE;
1121       *comps = 2;
1122       return;
1123
1124    case MESA_FORMAT_RGBA_FLOAT32:
1125       *datatype = GL_FLOAT;
1126       *comps = 4;
1127       return;
1128    case MESA_FORMAT_RGBA_FLOAT16:
1129       *datatype = GL_HALF_FLOAT_ARB;
1130       *comps = 4;
1131       return;
1132    case MESA_FORMAT_RGB_FLOAT32:
1133       *datatype = GL_FLOAT;
1134       *comps = 3;
1135       return;
1136    case MESA_FORMAT_RGB_FLOAT16:
1137       *datatype = GL_HALF_FLOAT_ARB;
1138       *comps = 3;
1139       return;
1140    case MESA_FORMAT_LA_FLOAT32:
1141    case MESA_FORMAT_RG_FLOAT32:
1142       *datatype = GL_FLOAT;
1143       *comps = 2;
1144       return;
1145    case MESA_FORMAT_LA_FLOAT16:
1146    case MESA_FORMAT_RG_FLOAT16:
1147       *datatype = GL_HALF_FLOAT_ARB;
1148       *comps = 2;
1149       return;
1150    case MESA_FORMAT_A_FLOAT32:
1151    case MESA_FORMAT_L_FLOAT32:
1152    case MESA_FORMAT_I_FLOAT32:
1153    case MESA_FORMAT_R_FLOAT32:
1154       *datatype = GL_FLOAT;
1155       *comps = 1;
1156       return;
1157    case MESA_FORMAT_A_FLOAT16:
1158    case MESA_FORMAT_L_FLOAT16:
1159    case MESA_FORMAT_I_FLOAT16:
1160    case MESA_FORMAT_R_FLOAT16:
1161       *datatype = GL_HALF_FLOAT_ARB;
1162       *comps = 1;
1163       return;
1164
1165    case MESA_FORMAT_A_UINT8:
1166    case MESA_FORMAT_L_UINT8:
1167    case MESA_FORMAT_I_UINT8:
1168       *datatype = GL_UNSIGNED_BYTE;
1169       *comps = 1;
1170       return;
1171    case MESA_FORMAT_LA_UINT8:
1172       *datatype = GL_UNSIGNED_BYTE;
1173       *comps = 2;
1174       return;
1175
1176    case MESA_FORMAT_A_UINT16:
1177    case MESA_FORMAT_L_UINT16:
1178    case MESA_FORMAT_I_UINT16:
1179       *datatype = GL_UNSIGNED_SHORT;
1180       *comps = 1;
1181       return;
1182    case MESA_FORMAT_LA_UINT16:
1183       *datatype = GL_UNSIGNED_SHORT;
1184       *comps = 2;
1185       return;
1186    case MESA_FORMAT_A_UINT32:
1187    case MESA_FORMAT_L_UINT32:
1188    case MESA_FORMAT_I_UINT32:
1189       *datatype = GL_UNSIGNED_INT;
1190       *comps = 1;
1191       return;
1192    case MESA_FORMAT_LA_UINT32:
1193       *datatype = GL_UNSIGNED_INT;
1194       *comps = 2;
1195       return;
1196    case MESA_FORMAT_A_SINT8:
1197    case MESA_FORMAT_L_SINT8:
1198    case MESA_FORMAT_I_SINT8:
1199       *datatype = GL_BYTE;
1200       *comps = 1;
1201       return;
1202    case MESA_FORMAT_LA_SINT8:
1203       *datatype = GL_BYTE;
1204       *comps = 2;
1205       return;
1206
1207    case MESA_FORMAT_A_SINT16:
1208    case MESA_FORMAT_L_SINT16:
1209    case MESA_FORMAT_I_SINT16:
1210       *datatype = GL_SHORT;
1211       *comps = 1;
1212       return;
1213    case MESA_FORMAT_LA_SINT16:
1214       *datatype = GL_SHORT;
1215       *comps = 2;
1216       return;
1217
1218    case MESA_FORMAT_A_SINT32:
1219    case MESA_FORMAT_L_SINT32:
1220    case MESA_FORMAT_I_SINT32:
1221       *datatype = GL_INT;
1222       *comps = 1;
1223       return;
1224    case MESA_FORMAT_LA_SINT32:
1225       *datatype = GL_INT;
1226       *comps = 2;
1227       return;
1228
1229    case MESA_FORMAT_R_SINT8:
1230       *datatype = GL_BYTE;
1231       *comps = 1;
1232       return;
1233    case MESA_FORMAT_RG_SINT8:
1234       *datatype = GL_BYTE;
1235       *comps = 2;
1236       return;
1237    case MESA_FORMAT_RGB_SINT8:
1238       *datatype = GL_BYTE;
1239       *comps = 3;
1240       return;
1241    case MESA_FORMAT_RGBA_SINT8:
1242       *datatype = GL_BYTE;
1243       *comps = 4;
1244       return;
1245    case MESA_FORMAT_R_SINT16:
1246       *datatype = GL_SHORT;
1247       *comps = 1;
1248       return;
1249    case MESA_FORMAT_RG_SINT16:
1250       *datatype = GL_SHORT;
1251       *comps = 2;
1252       return;
1253    case MESA_FORMAT_RGB_SINT16:
1254       *datatype = GL_SHORT;
1255       *comps = 3;
1256       return;
1257    case MESA_FORMAT_RGBA_SINT16:
1258       *datatype = GL_SHORT;
1259       *comps = 4;
1260       return;
1261    case MESA_FORMAT_R_SINT32:
1262       *datatype = GL_INT;
1263       *comps = 1;
1264       return;
1265    case MESA_FORMAT_RG_SINT32:
1266       *datatype = GL_INT;
1267       *comps = 2;
1268       return;
1269    case MESA_FORMAT_RGB_SINT32:
1270       *datatype = GL_INT;
1271       *comps = 3;
1272       return;
1273    case MESA_FORMAT_RGBA_SINT32:
1274       *datatype = GL_INT;
1275       *comps = 4;
1276       return;
1277
1278    /**
1279     * \name Non-normalized unsigned integer formats.
1280     */
1281    case MESA_FORMAT_R_UINT8:
1282       *datatype = GL_UNSIGNED_BYTE;
1283       *comps = 1;
1284       return;
1285    case MESA_FORMAT_RG_UINT8:
1286       *datatype = GL_UNSIGNED_BYTE;
1287       *comps = 2;
1288       return;
1289    case MESA_FORMAT_RGB_UINT8:
1290       *datatype = GL_UNSIGNED_BYTE;
1291       *comps = 3;
1292       return;
1293    case MESA_FORMAT_RGBA_UINT8:
1294       *datatype = GL_UNSIGNED_BYTE;
1295       *comps = 4;
1296       return;
1297    case MESA_FORMAT_R_UINT16:
1298       *datatype = GL_UNSIGNED_SHORT;
1299       *comps = 1;
1300       return;
1301    case MESA_FORMAT_RG_UINT16:
1302       *datatype = GL_UNSIGNED_SHORT;
1303       *comps = 2;
1304       return;
1305    case MESA_FORMAT_RGB_UINT16:
1306       *datatype = GL_UNSIGNED_SHORT;
1307       *comps = 3;
1308       return;
1309    case MESA_FORMAT_RGBA_UINT16:
1310       *datatype = GL_UNSIGNED_SHORT;
1311       *comps = 4;
1312       return;
1313    case MESA_FORMAT_R_UINT32:
1314       *datatype = GL_UNSIGNED_INT;
1315       *comps = 1;
1316       return;
1317    case MESA_FORMAT_RG_UINT32:
1318       *datatype = GL_UNSIGNED_INT;
1319       *comps = 2;
1320       return;
1321    case MESA_FORMAT_RGB_UINT32:
1322       *datatype = GL_UNSIGNED_INT;
1323       *comps = 3;
1324       return;
1325    case MESA_FORMAT_RGBA_UINT32:
1326       *datatype = GL_UNSIGNED_INT;
1327       *comps = 4;
1328       return;
1329
1330    case MESA_FORMAT_R9G9B9E5_FLOAT:
1331       *datatype = GL_UNSIGNED_INT_5_9_9_9_REV;
1332       *comps = 3;
1333       return;
1334
1335    case MESA_FORMAT_R11G11B10_FLOAT:
1336       *datatype = GL_UNSIGNED_INT_10F_11F_11F_REV;
1337       *comps = 3;
1338       return;
1339
1340    case MESA_FORMAT_B10G10R10A2_UINT:
1341    case MESA_FORMAT_R10G10B10A2_UINT:
1342       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1343       *comps = 4;
1344       return;
1345
1346    case MESA_FORMAT_R8G8B8X8_SRGB:
1347    case MESA_FORMAT_X8B8G8R8_SRGB:
1348    case MESA_FORMAT_RGBX_UINT8:
1349       *datatype = GL_UNSIGNED_BYTE;
1350       *comps = 4;
1351       return;
1352
1353    case MESA_FORMAT_R8G8B8X8_SNORM:
1354    case MESA_FORMAT_RGBX_SINT8:
1355       *datatype = GL_BYTE;
1356       *comps = 4;
1357       return;
1358
1359    case MESA_FORMAT_B10G10R10X2_UNORM:
1360    case MESA_FORMAT_R10G10B10X2_UNORM:
1361       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1362       *comps = 4;
1363       return;
1364
1365    case MESA_FORMAT_RGBX_UNORM16:
1366    case MESA_FORMAT_RGBX_UINT16:
1367       *datatype = GL_UNSIGNED_SHORT;
1368       *comps = 4;
1369       return;
1370
1371    case MESA_FORMAT_RGBX_SNORM16:
1372    case MESA_FORMAT_RGBX_SINT16:
1373       *datatype = GL_SHORT;
1374       *comps = 4;
1375       return;
1376
1377    case MESA_FORMAT_RGBX_FLOAT16:
1378       *datatype = GL_HALF_FLOAT;
1379       *comps = 4;
1380       return;
1381
1382    case MESA_FORMAT_RGBX_FLOAT32:
1383       *datatype = GL_FLOAT;
1384       *comps = 4;
1385       return;
1386
1387    case MESA_FORMAT_RGBX_UINT32:
1388       *datatype = GL_UNSIGNED_INT;
1389       *comps = 4;
1390       return;
1391
1392    case MESA_FORMAT_RGBX_SINT32:
1393       *datatype = GL_INT;
1394       *comps = 4;
1395       return;
1396
1397    case MESA_FORMAT_R10G10B10A2_UNORM:
1398       *datatype = GL_UNSIGNED_INT_2_10_10_10_REV;
1399       *comps = 4;
1400       return;
1401
1402    case MESA_FORMAT_G8R8_SNORM:
1403       *datatype = GL_BYTE;
1404       *comps = 2;
1405       return;
1406
1407    case MESA_FORMAT_G16R16_SNORM:
1408       *datatype = GL_SHORT;
1409       *comps = 2;
1410       return;
1411
1412    case MESA_FORMAT_B8G8R8X8_SRGB:
1413    case MESA_FORMAT_X8R8G8B8_SRGB:
1414       *datatype = GL_UNSIGNED_BYTE;
1415       *comps = 4;
1416       return;
1417
1418    case MESA_FORMAT_COUNT:
1419       assert(0);
1420       return;
1421    default:
1422       /* Warn if any formats are not handled */
1423       _mesa_problem(NULL, "bad format %s in _mesa_uncompressed_format_to_type_and_comps",
1424                     _mesa_get_format_name(format));
1425       assert(format == MESA_FORMAT_NONE ||
1426              _mesa_is_format_compressed(format));
1427       *datatype = 0;
1428       *comps = 1;
1429    }
1430 }
1431
1432 /**
1433  * Check if a mesa_format exactly matches a GL format/type combination
1434  * such that we can use memcpy() from one to the other.
1435  * \param mesa_format  a MESA_FORMAT_x value
1436  * \param format  the user-specified image format
1437  * \param type  the user-specified image datatype
1438  * \param swapBytes  typically the current pixel pack/unpack byteswap state
1439  * \param[out] error GL_NO_ERROR if format is an expected input.
1440  *                   GL_INVALID_ENUM if format is an unexpected input.
1441  * \return GL_TRUE if the formats match, GL_FALSE otherwise.
1442  */
1443 GLboolean
1444 _mesa_format_matches_format_and_type(mesa_format mesa_format,
1445                                      GLenum format, GLenum type,
1446                                      GLboolean swapBytes, GLenum *error)
1447 {
1448    const GLboolean littleEndian = _mesa_little_endian();
1449    if (error)
1450       *error = GL_NO_ERROR;
1451
1452    /* Note: When reading a GL format/type combination, the format lists channel
1453     * assignments from most significant channel in the type to least
1454     * significant.  A type with _REV indicates that the assignments are
1455     * swapped, so they are listed from least significant to most significant.
1456     *
1457     * Compressed formats will fall through and return GL_FALSE.
1458     *
1459     * For sanity, please keep this switch statement ordered the same as the
1460     * enums in formats.h.
1461     */
1462
1463    switch (mesa_format) {
1464
1465    case MESA_FORMAT_NONE:
1466    case MESA_FORMAT_COUNT:
1467       return GL_FALSE;
1468
1469    case MESA_FORMAT_A8B8G8R8_UNORM:
1470    case MESA_FORMAT_A8B8G8R8_SRGB:
1471       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1472          return GL_TRUE;
1473
1474       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
1475          return GL_TRUE;
1476
1477       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && !littleEndian)
1478          return GL_TRUE;
1479
1480       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV
1481           && !swapBytes)
1482          return GL_TRUE;
1483
1484       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8
1485           && swapBytes)
1486          return GL_TRUE;
1487
1488       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && littleEndian)
1489          return GL_TRUE;
1490
1491       return GL_FALSE;
1492
1493    case MESA_FORMAT_R8G8B8A8_UNORM:
1494    case MESA_FORMAT_R8G8B8A8_SRGB:
1495       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1496           !swapBytes)
1497          return GL_TRUE;
1498
1499       if (format == GL_RGBA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1500          return GL_TRUE;
1501
1502       if (format == GL_RGBA && type == GL_UNSIGNED_BYTE && littleEndian)
1503          return GL_TRUE;
1504
1505       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8 &&
1506           !swapBytes)
1507          return GL_TRUE;
1508
1509       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1510           swapBytes)
1511          return GL_TRUE;
1512
1513       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_BYTE && !littleEndian)
1514          return GL_TRUE;
1515
1516       return GL_FALSE;
1517
1518    case MESA_FORMAT_B8G8R8A8_UNORM:
1519    case MESA_FORMAT_B8G8R8A8_SRGB:
1520       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1521           !swapBytes)
1522          return GL_TRUE;
1523
1524       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
1525          return GL_TRUE;
1526
1527       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && littleEndian)
1528          return GL_TRUE;
1529
1530       return GL_FALSE;
1531
1532    case MESA_FORMAT_A8R8G8B8_UNORM:
1533    case MESA_FORMAT_A8R8G8B8_SRGB:
1534       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
1535          return GL_TRUE;
1536
1537       if (format == GL_BGRA && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
1538           swapBytes)
1539          return GL_TRUE;
1540
1541       if (format == GL_BGRA && type == GL_UNSIGNED_BYTE && !littleEndian)
1542          return GL_TRUE;
1543
1544       return GL_FALSE;
1545
1546    case MESA_FORMAT_X8B8G8R8_UNORM:
1547    case MESA_FORMAT_R8G8B8X8_UNORM:
1548       return GL_FALSE;
1549
1550    case MESA_FORMAT_B8G8R8X8_UNORM:
1551    case MESA_FORMAT_X8R8G8B8_UNORM:
1552       return GL_FALSE;
1553
1554    case MESA_FORMAT_BGR_UNORM8:
1555    case MESA_FORMAT_BGR_SRGB8:
1556       return format == GL_BGR && type == GL_UNSIGNED_BYTE && littleEndian;
1557
1558    case MESA_FORMAT_RGB_UNORM8:
1559       return format == GL_RGB && type == GL_UNSIGNED_BYTE && littleEndian;
1560
1561    case MESA_FORMAT_B5G6R5_UNORM:
1562       return ((format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5) ||
1563               (format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1564               !swapBytes;
1565
1566    case MESA_FORMAT_R5G6B5_UNORM:
1567       return ((format == GL_BGR && type == GL_UNSIGNED_SHORT_5_6_5) ||
1568               (format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5_REV)) &&
1569               !swapBytes;
1570
1571    case MESA_FORMAT_B4G4R4A4_UNORM:
1572       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1573          !swapBytes;
1574
1575    case MESA_FORMAT_A4R4G4B4_UNORM:
1576       return GL_FALSE;
1577
1578    case MESA_FORMAT_A1B5G5R5_UNORM:
1579       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1580          !swapBytes;
1581
1582    case MESA_FORMAT_X1B5G5R5_UNORM:
1583       return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1584          !swapBytes;
1585
1586    case MESA_FORMAT_B5G5R5A1_UNORM:
1587       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1588          !swapBytes;
1589
1590    case MESA_FORMAT_A1R5G5B5_UNORM:
1591       return format == GL_BGRA && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1592          !swapBytes;
1593
1594    case MESA_FORMAT_L4A4_UNORM:
1595       return GL_FALSE;
1596    case MESA_FORMAT_L8A8_UNORM:
1597    case MESA_FORMAT_L8A8_SRGB:
1598       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_BYTE && littleEndian;
1599    case MESA_FORMAT_A8L8_UNORM:
1600    case MESA_FORMAT_A8L8_SRGB:
1601       return GL_FALSE;
1602
1603    case MESA_FORMAT_L16A16_UNORM:
1604       return format == GL_LUMINANCE_ALPHA && type == GL_UNSIGNED_SHORT && littleEndian && !swapBytes;
1605    case MESA_FORMAT_A16L16_UNORM:
1606       return GL_FALSE;
1607
1608    case MESA_FORMAT_B2G3R3_UNORM:
1609       return format == GL_RGB && type == GL_UNSIGNED_BYTE_3_3_2;
1610
1611    case MESA_FORMAT_R3G3B2_UNORM:
1612       return format == GL_RGB && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1613
1614    case MESA_FORMAT_A4B4G4R4_UNORM:
1615       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1616          return GL_TRUE;
1617
1618       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1619          return GL_TRUE;
1620
1621       return GL_FALSE;
1622
1623    case MESA_FORMAT_R4G4B4A4_UNORM:
1624       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1625          return GL_TRUE;
1626
1627       if (format == GL_ABGR_EXT && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1628          return GL_TRUE;
1629
1630       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1631          return GL_TRUE;
1632
1633       if (format == GL_RGBA && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1634          return GL_TRUE;
1635
1636       return GL_FALSE;
1637
1638    case MESA_FORMAT_R5G5B5A1_UNORM:
1639       return format == GL_RGBA && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1640
1641    case MESA_FORMAT_A2B10G10R10_UNORM:
1642       return format == GL_RGBA && type == GL_UNSIGNED_INT_10_10_10_2;
1643
1644    case MESA_FORMAT_A2B10G10R10_UINT:
1645       return format == GL_RGBA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1646
1647    case MESA_FORMAT_A2R10G10B10_UNORM:
1648       return format == GL_BGRA && type == GL_UNSIGNED_INT_10_10_10_2;
1649
1650    case MESA_FORMAT_A2R10G10B10_UINT:
1651       return format == GL_BGRA_INTEGER_EXT && type == GL_UNSIGNED_INT_10_10_10_2;
1652
1653    case MESA_FORMAT_A_UNORM8:
1654       return format == GL_ALPHA && type == GL_UNSIGNED_BYTE;
1655    case MESA_FORMAT_A_UNORM16:
1656       return format == GL_ALPHA && type == GL_UNSIGNED_SHORT && !swapBytes;
1657    case MESA_FORMAT_L_UNORM8:
1658    case MESA_FORMAT_L_SRGB8:
1659       return format == GL_LUMINANCE && type == GL_UNSIGNED_BYTE;
1660    case MESA_FORMAT_L_UNORM16:
1661       return format == GL_LUMINANCE && type == GL_UNSIGNED_SHORT && !swapBytes;
1662    case MESA_FORMAT_I_UNORM8:
1663       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1664    case MESA_FORMAT_I_UNORM16:
1665       return format == GL_RED && type == GL_UNSIGNED_SHORT && !swapBytes;
1666
1667    case MESA_FORMAT_YCBCR:
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    case MESA_FORMAT_YCBCR_REV:
1672       return format == GL_YCBCR_MESA &&
1673              ((type == GL_UNSIGNED_SHORT_8_8_MESA && littleEndian == swapBytes) ||
1674               (type == GL_UNSIGNED_SHORT_8_8_REV_MESA && littleEndian != swapBytes));
1675
1676    case MESA_FORMAT_R_UNORM8:
1677    case MESA_FORMAT_R_SRGB8:
1678       return format == GL_RED && type == GL_UNSIGNED_BYTE;
1679    case MESA_FORMAT_R8G8_UNORM:
1680       return format == GL_RG && type == GL_UNSIGNED_BYTE && littleEndian;
1681    case MESA_FORMAT_G8R8_UNORM:
1682       return GL_FALSE;
1683
1684    case MESA_FORMAT_R_UNORM16:
1685       return format == GL_RED && type == GL_UNSIGNED_SHORT &&
1686          !swapBytes;
1687    case MESA_FORMAT_R16G16_UNORM:
1688       return format == GL_RG && type == GL_UNSIGNED_SHORT && littleEndian &&
1689          !swapBytes;
1690    case MESA_FORMAT_G16R16_UNORM:
1691       return GL_FALSE;
1692
1693    case MESA_FORMAT_B10G10R10A2_UNORM:
1694       return format == GL_BGRA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1695          !swapBytes;
1696
1697    case MESA_FORMAT_S8_UINT_Z24_UNORM:
1698       return format == GL_DEPTH_STENCIL && type == GL_UNSIGNED_INT_24_8 &&
1699          !swapBytes;
1700    case MESA_FORMAT_X8_UINT_Z24_UNORM:
1701    case MESA_FORMAT_Z24_UNORM_S8_UINT:
1702       return GL_FALSE;
1703
1704    case MESA_FORMAT_Z_UNORM16:
1705       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_SHORT &&
1706          !swapBytes;
1707
1708    case MESA_FORMAT_Z24_UNORM_X8_UINT:
1709       return GL_FALSE;
1710
1711    case MESA_FORMAT_Z_UNORM32:
1712       return format == GL_DEPTH_COMPONENT && type == GL_UNSIGNED_INT &&
1713          !swapBytes;
1714
1715    case MESA_FORMAT_S_UINT8:
1716       return format == GL_STENCIL_INDEX && type == GL_UNSIGNED_BYTE;
1717
1718    case MESA_FORMAT_RGBA_FLOAT32:
1719       return format == GL_RGBA && type == GL_FLOAT && !swapBytes;
1720    case MESA_FORMAT_RGBA_FLOAT16:
1721       return format == GL_RGBA && type == GL_HALF_FLOAT && !swapBytes;
1722
1723    case MESA_FORMAT_RGB_FLOAT32:
1724       return format == GL_RGB && type == GL_FLOAT && !swapBytes;
1725    case MESA_FORMAT_RGB_FLOAT16:
1726       return format == GL_RGB && type == GL_HALF_FLOAT && !swapBytes;
1727
1728    case MESA_FORMAT_A_FLOAT32:
1729       return format == GL_ALPHA && type == GL_FLOAT && !swapBytes;
1730    case MESA_FORMAT_A_FLOAT16:
1731       return format == GL_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1732
1733    case MESA_FORMAT_L_FLOAT32:
1734       return format == GL_LUMINANCE && type == GL_FLOAT && !swapBytes;
1735    case MESA_FORMAT_L_FLOAT16:
1736       return format == GL_LUMINANCE && type == GL_HALF_FLOAT && !swapBytes;
1737
1738    case MESA_FORMAT_LA_FLOAT32:
1739       return format == GL_LUMINANCE_ALPHA && type == GL_FLOAT && !swapBytes;
1740    case MESA_FORMAT_LA_FLOAT16:
1741       return format == GL_LUMINANCE_ALPHA && type == GL_HALF_FLOAT && !swapBytes;
1742
1743    case MESA_FORMAT_I_FLOAT32:
1744       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1745    case MESA_FORMAT_I_FLOAT16:
1746       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1747
1748    case MESA_FORMAT_R_FLOAT32:
1749       return format == GL_RED && type == GL_FLOAT && !swapBytes;
1750    case MESA_FORMAT_R_FLOAT16:
1751       return format == GL_RED && type == GL_HALF_FLOAT && !swapBytes;
1752
1753    case MESA_FORMAT_RG_FLOAT32:
1754       return format == GL_RG && type == GL_FLOAT && !swapBytes;
1755    case MESA_FORMAT_RG_FLOAT16:
1756       return format == GL_RG && type == GL_HALF_FLOAT && !swapBytes;
1757
1758    case MESA_FORMAT_A_UINT8:
1759       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_BYTE;
1760    case MESA_FORMAT_A_UINT16:
1761       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_SHORT &&
1762              !swapBytes;
1763    case MESA_FORMAT_A_UINT32:
1764       return format == GL_ALPHA_INTEGER && type == GL_UNSIGNED_INT &&
1765              !swapBytes;
1766    case MESA_FORMAT_A_SINT8:
1767       return format == GL_ALPHA_INTEGER && type == GL_BYTE;
1768    case MESA_FORMAT_A_SINT16:
1769       return format == GL_ALPHA_INTEGER && type == GL_SHORT && !swapBytes;
1770    case MESA_FORMAT_A_SINT32:
1771       return format == GL_ALPHA_INTEGER && type == GL_INT && !swapBytes;
1772
1773    case MESA_FORMAT_I_UINT8:
1774       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1775    case MESA_FORMAT_I_UINT16:
1776       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1777    case MESA_FORMAT_I_UINT32:
1778       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1779    case MESA_FORMAT_I_SINT8:
1780       return format == GL_RED_INTEGER && type == GL_BYTE;
1781    case MESA_FORMAT_I_SINT16:
1782       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1783    case MESA_FORMAT_I_SINT32:
1784       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1785
1786    case MESA_FORMAT_L_UINT8:
1787       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_BYTE;
1788    case MESA_FORMAT_L_UINT16:
1789       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_SHORT &&
1790              !swapBytes;
1791    case MESA_FORMAT_L_UINT32:
1792       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_UNSIGNED_INT &&
1793              !swapBytes;
1794    case MESA_FORMAT_L_SINT8:
1795       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_BYTE;
1796    case MESA_FORMAT_L_SINT16:
1797       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_SHORT &&
1798              !swapBytes;
1799    case MESA_FORMAT_L_SINT32:
1800       return format == GL_LUMINANCE_INTEGER_EXT && type == GL_INT && !swapBytes;
1801
1802    case MESA_FORMAT_LA_UINT8:
1803       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1804              type == GL_UNSIGNED_BYTE && !swapBytes;
1805    case MESA_FORMAT_LA_UINT16:
1806       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1807              type == GL_UNSIGNED_SHORT && !swapBytes;
1808    case MESA_FORMAT_LA_UINT32:
1809       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT &&
1810              type == GL_UNSIGNED_INT && !swapBytes;
1811    case MESA_FORMAT_LA_SINT8:
1812       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_BYTE &&
1813              !swapBytes;
1814    case MESA_FORMAT_LA_SINT16:
1815       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_SHORT &&
1816              !swapBytes;
1817    case MESA_FORMAT_LA_SINT32:
1818       return format == GL_LUMINANCE_ALPHA_INTEGER_EXT && type == GL_INT &&
1819              !swapBytes;
1820
1821    case MESA_FORMAT_R_SINT8:
1822       return format == GL_RED_INTEGER && type == GL_BYTE;
1823    case MESA_FORMAT_RG_SINT8:
1824       return format == GL_RG_INTEGER && type == GL_BYTE && !swapBytes;
1825    case MESA_FORMAT_RGB_SINT8:
1826       return format == GL_RGB_INTEGER && type == GL_BYTE && !swapBytes;
1827    case MESA_FORMAT_RGBA_SINT8:
1828       return format == GL_RGBA_INTEGER && type == GL_BYTE && !swapBytes;
1829    case MESA_FORMAT_R_SINT16:
1830       return format == GL_RED_INTEGER && type == GL_SHORT && !swapBytes;
1831    case MESA_FORMAT_RG_SINT16:
1832       return format == GL_RG_INTEGER && type == GL_SHORT && !swapBytes;
1833    case MESA_FORMAT_RGB_SINT16:
1834       return format == GL_RGB_INTEGER && type == GL_SHORT && !swapBytes;
1835    case MESA_FORMAT_RGBA_SINT16:
1836       return format == GL_RGBA_INTEGER && type == GL_SHORT && !swapBytes;
1837    case MESA_FORMAT_R_SINT32:
1838       return format == GL_RED_INTEGER && type == GL_INT && !swapBytes;
1839    case MESA_FORMAT_RG_SINT32:
1840       return format == GL_RG_INTEGER && type == GL_INT && !swapBytes;
1841    case MESA_FORMAT_RGB_SINT32:
1842       return format == GL_RGB_INTEGER && type == GL_INT && !swapBytes;
1843    case MESA_FORMAT_RGBA_SINT32:
1844       return format == GL_RGBA_INTEGER && type == GL_INT && !swapBytes;
1845
1846    case MESA_FORMAT_R_UINT8:
1847       return format == GL_RED_INTEGER && type == GL_UNSIGNED_BYTE;
1848    case MESA_FORMAT_RG_UINT8:
1849       return format == GL_RG_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1850    case MESA_FORMAT_RGB_UINT8:
1851       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE && !swapBytes;
1852    case MESA_FORMAT_RGBA_UINT8:
1853       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_BYTE &&
1854              !swapBytes;
1855    case MESA_FORMAT_R_UINT16:
1856       return format == GL_RED_INTEGER && type == GL_UNSIGNED_SHORT &&
1857              !swapBytes;
1858    case MESA_FORMAT_RG_UINT16:
1859       return format == GL_RG_INTEGER && type == GL_UNSIGNED_SHORT && !swapBytes;
1860    case MESA_FORMAT_RGB_UINT16:
1861       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT &&
1862              !swapBytes;
1863    case MESA_FORMAT_RGBA_UINT16:
1864       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT &&
1865              !swapBytes;
1866    case MESA_FORMAT_R_UINT32:
1867       return format == GL_RED_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1868    case MESA_FORMAT_RG_UINT32:
1869       return format == GL_RG_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1870    case MESA_FORMAT_RGB_UINT32:
1871       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1872    case MESA_FORMAT_RGBA_UINT32:
1873       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT && !swapBytes;
1874
1875    case MESA_FORMAT_R_SNORM8:
1876       return format == GL_RED && type == GL_BYTE;
1877    case MESA_FORMAT_R8G8_SNORM:
1878       return format == GL_RG && type == GL_BYTE && littleEndian &&
1879              !swapBytes;
1880    case MESA_FORMAT_X8B8G8R8_SNORM:
1881       return GL_FALSE;
1882
1883    case MESA_FORMAT_A8B8G8R8_SNORM:
1884       if (format == GL_RGBA && type == GL_BYTE && !littleEndian)
1885          return GL_TRUE;
1886
1887       if (format == GL_ABGR_EXT && type == GL_BYTE && littleEndian)
1888          return GL_TRUE;
1889
1890       return GL_FALSE;
1891
1892    case MESA_FORMAT_R8G8B8A8_SNORM:
1893       if (format == GL_RGBA && type == GL_BYTE && littleEndian)
1894          return GL_TRUE;
1895
1896       if (format == GL_ABGR_EXT && type == GL_BYTE && !littleEndian)
1897          return GL_TRUE;
1898
1899       return GL_FALSE;
1900
1901    case MESA_FORMAT_R_SNORM16:
1902       return format == GL_RED && type == GL_SHORT &&
1903              !swapBytes;
1904    case MESA_FORMAT_R16G16_SNORM:
1905       return format == GL_RG && type == GL_SHORT && littleEndian && !swapBytes;
1906    case MESA_FORMAT_RGB_SNORM16:
1907       return format == GL_RGB && type == GL_SHORT && !swapBytes;
1908    case MESA_FORMAT_RGBA_SNORM16:
1909       return format == GL_RGBA && type == GL_SHORT && !swapBytes;
1910    case MESA_FORMAT_RGBA_UNORM16:
1911       return format == GL_RGBA && type == GL_UNSIGNED_SHORT &&
1912              !swapBytes;
1913
1914    case MESA_FORMAT_A_SNORM8:
1915       return format == GL_ALPHA && type == GL_BYTE;
1916    case MESA_FORMAT_L_SNORM8:
1917       return format == GL_LUMINANCE && type == GL_BYTE;
1918    case MESA_FORMAT_L8A8_SNORM:
1919       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1920              littleEndian && !swapBytes;
1921    case MESA_FORMAT_A8L8_SNORM:
1922       return format == GL_LUMINANCE_ALPHA && type == GL_BYTE &&
1923              !littleEndian && !swapBytes;
1924    case MESA_FORMAT_I_SNORM8:
1925       return format == GL_RED && type == GL_BYTE;
1926    case MESA_FORMAT_A_SNORM16:
1927       return format == GL_ALPHA && type == GL_SHORT && !swapBytes;
1928    case MESA_FORMAT_L_SNORM16:
1929       return format == GL_LUMINANCE && type == GL_SHORT && !swapBytes;
1930    case MESA_FORMAT_LA_SNORM16:
1931       return format == GL_LUMINANCE_ALPHA && type == GL_SHORT &&
1932              littleEndian && !swapBytes;
1933    case MESA_FORMAT_I_SNORM16:
1934       return format == GL_RED && type == GL_SHORT && littleEndian &&
1935              !swapBytes;
1936
1937    case MESA_FORMAT_B10G10R10A2_UINT:
1938       return (format == GL_BGRA_INTEGER_EXT &&
1939               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1940               !swapBytes);
1941
1942    case MESA_FORMAT_R10G10B10A2_UINT:
1943       return (format == GL_RGBA_INTEGER_EXT &&
1944               type == GL_UNSIGNED_INT_2_10_10_10_REV &&
1945               !swapBytes);
1946
1947    case MESA_FORMAT_B5G6R5_UINT:
1948       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5;
1949
1950    case MESA_FORMAT_R5G6B5_UINT:
1951       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_SHORT_5_6_5_REV;
1952
1953    case MESA_FORMAT_B2G3R3_UINT:
1954       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_3_3_2;
1955
1956    case MESA_FORMAT_R3G3B2_UINT:
1957       return format == GL_RGB_INTEGER && type == GL_UNSIGNED_BYTE_2_3_3_REV;
1958
1959    case MESA_FORMAT_A4B4G4R4_UINT:
1960       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && !swapBytes)
1961          return GL_TRUE;
1962
1963       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && swapBytes)
1964          return GL_TRUE;
1965       return GL_FALSE;
1966
1967    case MESA_FORMAT_R4G4B4A4_UINT:
1968       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV && !swapBytes)
1969          return GL_TRUE;
1970
1971       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4 && swapBytes)
1972          return GL_TRUE;
1973
1974       return GL_FALSE;
1975
1976    case MESA_FORMAT_B4G4R4A4_UINT:
1977       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_4_4_4_4_REV &&
1978          !swapBytes;
1979
1980    case MESA_FORMAT_A4R4G4B4_UINT:
1981       return GL_FALSE;
1982
1983    case MESA_FORMAT_A1B5G5R5_UINT:
1984       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1985          !swapBytes;
1986
1987    case MESA_FORMAT_B5G5R5A1_UINT:
1988       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV &&
1989          !swapBytes;
1990
1991    case MESA_FORMAT_A1R5G5B5_UINT:
1992       return format == GL_BGRA_INTEGER && type == GL_UNSIGNED_SHORT_5_5_5_1 &&
1993          !swapBytes;
1994
1995    case MESA_FORMAT_R5G5B5A1_UINT:
1996       return format == GL_RGBA_INTEGER && type == GL_UNSIGNED_SHORT_1_5_5_5_REV;
1997
1998    case MESA_FORMAT_A8B8G8R8_UINT:
1999       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && !swapBytes)
2000          return GL_TRUE;
2001
2002       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV && swapBytes)
2003          return GL_TRUE;
2004       return GL_FALSE;
2005
2006    case MESA_FORMAT_A8R8G8B8_UINT:
2007       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 &&
2008           !swapBytes)
2009          return GL_TRUE;
2010
2011       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2012           swapBytes)
2013          return GL_TRUE;
2014
2015       return GL_FALSE;
2016
2017    case MESA_FORMAT_R8G8B8A8_UINT:
2018       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2019           !swapBytes)
2020          return GL_TRUE;
2021
2022       if (format == GL_RGBA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
2023          return GL_TRUE;
2024
2025       return GL_FALSE;
2026
2027    case MESA_FORMAT_B8G8R8A8_UINT:
2028       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8_REV &&
2029           !swapBytes)
2030          return GL_TRUE;
2031
2032       if (format == GL_BGRA_INTEGER && type == GL_UNSIGNED_INT_8_8_8_8 && swapBytes)
2033          return GL_TRUE;
2034
2035       return GL_FALSE;
2036
2037    case MESA_FORMAT_R9G9B9E5_FLOAT:
2038       return format == GL_RGB && type == GL_UNSIGNED_INT_5_9_9_9_REV &&
2039          !swapBytes;
2040
2041    case MESA_FORMAT_R11G11B10_FLOAT:
2042       return format == GL_RGB && type == GL_UNSIGNED_INT_10F_11F_11F_REV &&
2043          !swapBytes;
2044
2045    case MESA_FORMAT_Z_FLOAT32:
2046       return format == GL_DEPTH_COMPONENT && type == GL_FLOAT && !swapBytes;
2047
2048    case MESA_FORMAT_Z32_FLOAT_S8X24_UINT:
2049       return format == GL_DEPTH_STENCIL &&
2050              type == GL_FLOAT_32_UNSIGNED_INT_24_8_REV && !swapBytes;
2051
2052    case MESA_FORMAT_B4G4R4X4_UNORM:
2053    case MESA_FORMAT_B5G5R5X1_UNORM:
2054    case MESA_FORMAT_R8G8B8X8_SNORM:
2055    case MESA_FORMAT_R8G8B8X8_SRGB:
2056    case MESA_FORMAT_X8B8G8R8_SRGB:
2057    case MESA_FORMAT_RGBX_UINT8:
2058    case MESA_FORMAT_RGBX_SINT8:
2059    case MESA_FORMAT_B10G10R10X2_UNORM:
2060    case MESA_FORMAT_RGBX_UNORM16:
2061    case MESA_FORMAT_RGBX_SNORM16:
2062    case MESA_FORMAT_RGBX_FLOAT16:
2063    case MESA_FORMAT_RGBX_UINT16:
2064    case MESA_FORMAT_RGBX_SINT16:
2065    case MESA_FORMAT_RGBX_FLOAT32:
2066    case MESA_FORMAT_RGBX_UINT32:
2067    case MESA_FORMAT_RGBX_SINT32:
2068       return GL_FALSE;
2069
2070    case MESA_FORMAT_R10G10B10X2_UNORM:
2071       return format == GL_RGB && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2072          !swapBytes;
2073    case MESA_FORMAT_R10G10B10A2_UNORM:
2074       return format == GL_RGBA && type == GL_UNSIGNED_INT_2_10_10_10_REV &&
2075          !swapBytes;
2076
2077    case MESA_FORMAT_G8R8_SNORM:
2078       return format == GL_RG && type == GL_BYTE && !littleEndian &&
2079          !swapBytes;
2080
2081    case MESA_FORMAT_G16R16_SNORM:
2082       return format == GL_RG && type == GL_SHORT && !littleEndian &&
2083          !swapBytes;
2084
2085    case MESA_FORMAT_B8G8R8X8_SRGB:
2086    case MESA_FORMAT_X8R8G8B8_SRGB:
2087       return GL_FALSE;
2088    default:
2089       assert(_mesa_is_format_compressed(mesa_format));
2090       if (error)
2091          *error = GL_INVALID_ENUM;
2092    }
2093    return GL_FALSE;
2094 }
2095