src/mesa/main/texformat.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 /**
  28  * \file texformat.c
  29  * Texture formats.
  30  *
  31  * \author Gareth Hughes
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "context.h"
  37 #include "enums.h"
  38 #include "mtypes.h"
  39 #include "texcompress.h"
  40 #include "texformat.h"
  41 #include "glformats.h"
  42
  43 #define RETURN_IF_SUPPORTED(f) do {             \
  44    if (ctx->TextureFormatSupported[f])          \
  45       return f;                                 \
  46 } while (0)
  47
  48 /**
  49  * Choose an appropriate texture format given the format, type and
  50  * internalFormat parameters passed to glTexImage().
  51  *
  52  * \param ctx  the GL context.
  53  * \param target  a texture target (GL_TEXTURE_x)
  54  * \param internalFormat  user's prefered internal texture format.
  55  * \param format  incoming image pixel format.
  56  * \param type  incoming image data type.
  57  *
  58  * \return the closest mesa_format for the given format/type arguments
  59  *
  60  * This is called via dd_function_table::ChooseTextureFormat.  Hardware
  61  * drivers may override this function with a specialized version.
  62  */
  63 mesa_format
  64 _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
  65                         GLint internalFormat, GLenum format, GLenum type)
  66 {
  67    (void) format;
  68
  69    switch (internalFormat) {
  70    /* shallow RGBA formats */
  71    case 4:
  72    case GL_RGBA:
  73       if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
  74          RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  75       } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
  76          RETURN_IF_SUPPORTED(MESA_FORMAT_B5G5R5A1_UNORM);
  77       } else if (type == GL_UNSIGNED_SHORT_5_5_5_1) {
  78          RETURN_IF_SUPPORTED(MESA_FORMAT_B5G5R5A1_UNORM);
  79       } else if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
  80          RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
  81       }
  82       /* fallthrough */
  83
  84    case GL_RGBA8:
  85       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_UNORM);
  86       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
  87       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
  88       break;
  89    case GL_RGB5_A1:
  90       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G5R5A1_UNORM);
  91       break;
  92    case GL_RGBA2:
  93       RETURN_IF_SUPPORTED(MESA_FORMAT_A4R4G4B4_UNORM); /* just to test another format*/
  94       RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  95       break;
  96    case GL_RGBA4:
  97       RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  98       break;
  99
 100    /* deep RGBA formats */
 101    case GL_RGB10_A2:
 102       RETURN_IF_SUPPORTED(MESA_FORMAT_R10G10B10A2_UNORM);
 103       RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
 104       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 105       break;
 106    case GL_RGBA12:
 107    case GL_RGBA16:
 108       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 109       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 110       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
 111       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 112       break;
 113
 114    /* shallow RGB formats */
 115    case 3:
 116    case GL_RGB:
 117       if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 118          RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
 119       }
 120       /* fallthrough */
 121    case GL_RGB8:
 122       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UNORM8);
 123       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8X8_UNORM);
 124       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_UNORM);
 125
 126       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 127       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 128       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 129       break;
 130    case GL_R3_G3_B2:
 131       RETURN_IF_SUPPORTED(MESA_FORMAT_B2G3R3_UNORM);
 132       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 133       RETURN_IF_SUPPORTED(MESA_FORMAT_R5G6B5_UNORM);
 134       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 135       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 136       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 137       break;
 138    case GL_RGB4:
 139       RETURN_IF_SUPPORTED(MESA_FORMAT_R5G6B5_UNORM); /* just to test another format */
 140       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 141       break;
 142    case GL_RGB5:
 143       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 144       break;
 145
 146    /* deep RGB formats */
 147    case GL_RGB10:
 148    case GL_RGB12:
 149    case GL_RGB16:
 150       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UNORM16);
 151       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 152       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 153       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 154       break;
 155
 156    /* Alpha formats */
 157    case GL_ALPHA:
 158    case GL_ALPHA4:
 159    case GL_ALPHA8:
 160       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 161       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 162       break;
 163
 164    case GL_ALPHA12:
 165    case GL_ALPHA16:
 166       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM16);
 167       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 168       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 169       break;
 170
 171    /* Luminance formats */
 172    case 1:
 173    case GL_LUMINANCE:
 174    case GL_LUMINANCE4:
 175    case GL_LUMINANCE8:
 176       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 177       break;
 178
 179    case GL_LUMINANCE12:
 180    case GL_LUMINANCE16:
 181       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM16);
 182       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 183       break;
 184
 185       /* Luminance/Alpha formats */
 186    case GL_LUMINANCE4_ALPHA4:
 187       RETURN_IF_SUPPORTED(MESA_FORMAT_L4A4_UNORM);
 188       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 189       break;
 190
 191    case 2:
 192    case GL_LUMINANCE_ALPHA:
 193    case GL_LUMINANCE6_ALPHA2:
 194    case GL_LUMINANCE8_ALPHA8:
 195       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 196       break;
 197
 198    case GL_LUMINANCE12_ALPHA4:
 199    case GL_LUMINANCE12_ALPHA12:
 200    case GL_LUMINANCE16_ALPHA16:
 201       RETURN_IF_SUPPORTED(MESA_FORMAT_L16A16_UNORM);
 202       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 203       break;
 204
 205    case GL_INTENSITY:
 206    case GL_INTENSITY4:
 207    case GL_INTENSITY8:
 208       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 209       break;
 210
 211    case GL_INTENSITY12:
 212    case GL_INTENSITY16:
 213       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM16);
 214       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 215       break;
 216
 217    case GL_DEPTH_COMPONENT:
 218    case GL_DEPTH_COMPONENT24:
 219    case GL_DEPTH_COMPONENT32:
 220       RETURN_IF_SUPPORTED(MESA_FORMAT_Z_UNORM32);
 221       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 222       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 223       break;
 224    case GL_DEPTH_COMPONENT16:
 225       RETURN_IF_SUPPORTED(MESA_FORMAT_Z_UNORM16);
 226       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 227       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 228       break;
 229
 230    case GL_COMPRESSED_ALPHA_ARB:
 231       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 232       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 233       break;
 234    case GL_COMPRESSED_LUMINANCE_ARB:
 235       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 236       break;
 237    case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
 238       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 239       break;
 240    case GL_COMPRESSED_INTENSITY_ARB:
 241       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 242       break;
 243    case GL_COMPRESSED_RGB_ARB:
 244       /* We don't use texture compression for 1D and 1D array textures.
 245        * For 1D textures, compressions doesn't buy us much.
 246        * For 1D ARRAY textures, there's complicated issues with updating
 247        * sub-regions on non-block boundaries with glCopyTexSubImage, among
 248        * other issues.  FWIW, the GL_EXT_texture_array extension prohibits
 249        * 1D ARRAY textures in S3TC format.
 250        */
 251       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 252          if (ctx->Mesa_DXTn)
 253             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 254          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 255       }
 256       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 257       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 258       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 259       break;
 260    case GL_COMPRESSED_RGBA_ARB:
 261       /* We don't use texture compression for 1D and 1D array textures. */
 262       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 263          if (ctx->Mesa_DXTn)
 264             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
 265          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 266       }
 267       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
 268       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 269       break;
 270
 271    case GL_RGB565:
 272       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 273       break;
 274
 275    case GL_YCBCR_MESA:
 276       if (type == GL_UNSIGNED_SHORT_8_8_MESA)
 277          RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
 278       else
 279          RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
 280       break;
 281
 282    case GL_ALPHA16F_ARB:
 283       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT16);
 284       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT32);
 285       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 286       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 287       break;
 288    case GL_ALPHA32F_ARB:
 289       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT32);
 290       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 291       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT16);
 292       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 293       break;
 294    case GL_LUMINANCE16F_ARB:
 295       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT16);
 296       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT32);
 297       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 298       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 299       break;
 300    case GL_LUMINANCE32F_ARB:
 301       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT32);
 302       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 303       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT16);
 304       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 305       break;
 306    case GL_LUMINANCE_ALPHA16F_ARB:
 307       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT16);
 308       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT32);
 309       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 310       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 311       break;
 312    case GL_LUMINANCE_ALPHA32F_ARB:
 313       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT32);
 314       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 315       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT16);
 316       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 317       break;
 318    case GL_INTENSITY16F_ARB:
 319       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT16);
 320       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT32);
 321       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 322       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 323       break;
 324    case GL_INTENSITY32F_ARB:
 325       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT32);
 326       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 327       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT16);
 328       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 329       break;
 330    case GL_RGB16F_ARB:
 331       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 332       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_FLOAT16);
 333       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 334       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 335       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 336       break;
 337    case GL_RGB32F_ARB:
 338       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 339       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_FLOAT32);
 340       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 341       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 342       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 343       break;
 344    case GL_RGBA16F_ARB:
 345       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 346       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 347       break;
 348    case GL_RGBA32F_ARB:
 349       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 350       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 351       break;
 352
 353    case GL_RGB9_E5:
 354       /* GL_EXT_texture_shared_exponent -- just one format to support */
 355       assert(ctx->TextureFormatSupported[MESA_FORMAT_R9G9B9E5_FLOAT]);
 356       return MESA_FORMAT_R9G9B9E5_FLOAT;
 357
 358    case GL_R11F_G11F_B10F:
 359       /* GL_EXT_texture_packed_float -- just one format to support */
 360       assert(ctx->TextureFormatSupported[MESA_FORMAT_R11G11B10_FLOAT]);
 361       return MESA_FORMAT_R11G11B10_FLOAT;
 362
 363    case GL_DEPTH_STENCIL_EXT:
 364    case GL_DEPTH24_STENCIL8_EXT:
 365       RETURN_IF_SUPPORTED(MESA_FORMAT_S8_UINT_Z24_UNORM);
 366       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 367       break;
 368
 369    case GL_DEPTH_COMPONENT32F:
 370       assert(ctx->TextureFormatSupported[MESA_FORMAT_Z_FLOAT32]);
 371       return MESA_FORMAT_Z_FLOAT32;
 372    case GL_DEPTH32F_STENCIL8:
 373       assert(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT_S8X24_UINT]);
 374       return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
 375
 376    case GL_RED_SNORM:
 377    case GL_R8_SNORM:
 378       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SNORM8);
 379       break;
 380    case GL_RG_SNORM:
 381    case GL_RG8_SNORM:
 382       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8_SNORM);
 383       break;
 384    case GL_RGB_SNORM:
 385    case GL_RGB8_SNORM:
 386       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8X8_SNORM);
 387       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 388       RETURN_IF_SUPPORTED(MESA_FORMAT_X8B8G8R8_SNORM);
 389       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 390       break;
 391    case GL_RGBA_SNORM:
 392    case GL_RGBA8_SNORM:
 393       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 394       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 395       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 396       break;
 397    case GL_ALPHA_SNORM:
 398    case GL_ALPHA8_SNORM:
 399       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SNORM8);
 400       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 401       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 402       break;
 403    case GL_LUMINANCE_SNORM:
 404    case GL_LUMINANCE8_SNORM:
 405       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SNORM8);
 406       RETURN_IF_SUPPORTED(MESA_FORMAT_X8B8G8R8_SNORM);
 407       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 408       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 409       break;
 410    case GL_LUMINANCE_ALPHA_SNORM:
 411    case GL_LUMINANCE8_ALPHA8_SNORM:
 412       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_SNORM);
 413       RETURN_IF_SUPPORTED(MESA_FORMAT_A8L8_SNORM);
 414       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 415       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 416       break;
 417    case GL_INTENSITY_SNORM:
 418    case GL_INTENSITY8_SNORM:
 419       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SNORM8);
 420       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 421       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 422       break;
 423    case GL_R16_SNORM:
 424       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SNORM16);
 425       break;
 426    case GL_RG16_SNORM:
 427       RETURN_IF_SUPPORTED(MESA_FORMAT_R16G16_SNORM);
 428       break;
 429    case GL_RGB16_SNORM:
 430       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SNORM16);
 431       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SNORM16);
 432       /* FALLTHROUGH */
 433    case GL_RGBA16_SNORM:
 434       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 435       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 436       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 437       break;
 438    case GL_ALPHA16_SNORM:
 439       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SNORM16);
 440       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 441       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 442       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 443       break;
 444    case GL_LUMINANCE16_SNORM:
 445       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SNORM16);
 446       /* FALLTHROUGH */
 447    case GL_LUMINANCE16_ALPHA16_SNORM:
 448       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SNORM16);
 449       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 450       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 451       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 452       break;
 453    case GL_INTENSITY16_SNORM:
 454       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SNORM16);
 455       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 456       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 457       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 458       break;
 459
 460    case GL_SRGB_EXT:
 461    case GL_SRGB8_EXT:
 462       /* there is no MESA_FORMAT_RGB_SRGB8 */
 463       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8X8_SRGB);
 464       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SRGB);
 465
 466       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
 467       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 468
 469       RETURN_IF_SUPPORTED(MESA_FORMAT_X8B8G8R8_SRGB);
 470       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 471       break;
 472    case GL_SRGB_ALPHA_EXT:
 473    case GL_SRGB8_ALPHA8_EXT:
 474       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SRGB);
 475
 476       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
 477       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 478       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 479       break;
 480    case GL_SLUMINANCE_EXT:
 481    case GL_SLUMINANCE8_EXT:
 482       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SRGB8);
 483       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 484       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 485       break;
 486    case GL_SLUMINANCE_ALPHA_EXT:
 487    case GL_SLUMINANCE8_ALPHA8_EXT:
 488       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_SRGB);
 489       RETURN_IF_SUPPORTED(MESA_FORMAT_A8L8_SRGB);
 490       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 491       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 492       break;
 493    case GL_COMPRESSED_SLUMINANCE_EXT:
 494       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SRGB8);
 495       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 496       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 497       break;
 498    case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 499       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_SRGB);
 500       RETURN_IF_SUPPORTED(MESA_FORMAT_A8L8_SRGB);
 501       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 502       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 503       break;
 504    case GL_COMPRESSED_SRGB_EXT:
 505       if (ctx->Mesa_DXTn)
 506          RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 507       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
 508       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 509       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 510       break;
 511    case GL_COMPRESSED_SRGB_ALPHA_EXT:
 512       if (ctx->Mesa_DXTn)
 513          RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
 514       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
 515       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 516       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 517       break;
 518
 519    case GL_ALPHA8UI_EXT:
 520       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT8);
 521       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 522       break;
 523    case GL_ALPHA16UI_EXT:
 524       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT16);
 525       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 526       break;
 527    case GL_ALPHA32UI_EXT:
 528       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT32);
 529       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 530       break;
 531    case GL_ALPHA8I_EXT:
 532       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT8);
 533       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 534       break;
 535    case GL_ALPHA16I_EXT:
 536       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT16);
 537       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 538       break;
 539    case GL_ALPHA32I_EXT:
 540       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT32);
 541       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 542       break;
 543    case GL_LUMINANCE8UI_EXT:
 544       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT8);
 545       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 546       break;
 547    case GL_LUMINANCE16UI_EXT:
 548       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT16);
 549       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 550       break;
 551    case GL_LUMINANCE32UI_EXT:
 552       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT32);
 553       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 554       break;
 555    case GL_LUMINANCE8I_EXT:
 556       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT8);
 557       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 558       break;
 559    case GL_LUMINANCE16I_EXT:
 560       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT16);
 561       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 562       break;
 563    case GL_LUMINANCE32I_EXT:
 564       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT32);
 565       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 566       break;
 567    case GL_LUMINANCE_ALPHA8UI_EXT:
 568       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT8);
 569       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 570       break;
 571    case GL_LUMINANCE_ALPHA16UI_EXT:
 572       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT16);
 573       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 574       break;
 575    case GL_LUMINANCE_ALPHA32UI_EXT:
 576       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT32);
 577       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 578       break;
 579    case GL_LUMINANCE_ALPHA8I_EXT:
 580       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT8);
 581       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 582       break;
 583    case GL_LUMINANCE_ALPHA16I_EXT:
 584       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT16);
 585       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 586       break;
 587    case GL_LUMINANCE_ALPHA32I_EXT:
 588       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT32);
 589       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 590       break;
 591    case GL_INTENSITY8UI_EXT:
 592       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT8);
 593       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 594       break;
 595    case GL_INTENSITY16UI_EXT:
 596       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT16);
 597       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 598       break;
 599    case GL_INTENSITY32UI_EXT:
 600       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT32);
 601       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 602       break;
 603    case GL_INTENSITY8I_EXT:
 604       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT8);
 605       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 606       break;
 607    case GL_INTENSITY16I_EXT:
 608       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT16);
 609       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 610       break;
 611    case GL_INTENSITY32I_EXT:
 612       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT32);
 613       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 614       break;
 615
 616    case GL_RGB8UI_EXT:
 617       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
 618       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT8);
 619       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 620       break;
 621    case GL_RGB16UI_EXT:
 622       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT16);
 623       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT16);
 624       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 625       break;
 626    case GL_RGB32UI_EXT:
 627       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT32);
 628       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT32);
 629       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 630       break;
 631    case GL_RGB8I_EXT:
 632       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SINT8);
 633       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT8);
 634       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 635       break;
 636    case GL_RGB16I_EXT:
 637       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SINT16);
 638       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT16);
 639       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 640       break;
 641    case GL_RGB32I_EXT:
 642       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SINT32);
 643       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT32);
 644       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 645       break;
 646    case GL_RGBA8UI_EXT:
 647       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 648       break;
 649    case GL_RGBA16UI_EXT:
 650       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 651       break;
 652    case GL_RGBA32UI_EXT:
 653       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 654       break;
 655    case GL_RGBA8I_EXT:
 656       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 657       break;
 658    case GL_RGBA16I_EXT:
 659       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 660       break;
 661    case GL_RGBA32I_EXT:
 662       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 663       break;
 664
 665    case GL_R8:
 666    case GL_RED:
 667       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM8);
 668       break;
 669
 670    case GL_COMPRESSED_RED:
 671       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 672          RETURN_IF_SUPPORTED(MESA_FORMAT_R_RGTC1_UNORM);
 673       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM8);
 674       break;
 675
 676    case GL_R16:
 677       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM16);
 678       break;
 679
 680    case GL_RG:
 681    case GL_RG8:
 682       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8_UNORM);
 683       break;
 684
 685    case GL_COMPRESSED_RG:
 686       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 687          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2_UNORM);
 688       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8_UNORM);
 689       break;
 690
 691    case GL_RG16:
 692       RETURN_IF_SUPPORTED(MESA_FORMAT_R16G16_UNORM);
 693       break;
 694
 695    case GL_R16F:
 696       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 697       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 698       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 699       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 700       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 701       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 702       break;
 703    case GL_R32F:
 704       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 705       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 706       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 707       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 708       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 709       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 710       break;
 711    case GL_RG16F:
 712       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 713       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 714       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 715       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 716       break;
 717    case GL_RG32F:
 718       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 719       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 720       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 721       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 722       break;
 723
 724    case GL_R8UI:
 725       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);
 726       break;
 727    case GL_RG8UI:
 728       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT8);
 729       break;
 730    case GL_R16UI:
 731       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT16);
 732       break;
 733    case GL_RG16UI:
 734       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT16);
 735       break;
 736    case GL_R32UI:
 737       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT32);
 738       break;
 739    case GL_RG32UI:
 740       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT32);
 741       break;
 742    case GL_R8I:
 743       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SINT8);
 744       break;
 745    case GL_RG8I:
 746       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SINT8);
 747       break;
 748    case GL_R16I:
 749       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SINT16);
 750       break;
 751    case GL_RG16I:
 752       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SINT16);
 753       break;
 754    case GL_R32I:
 755       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SINT32);
 756       break;
 757    case GL_RG32I:
 758       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SINT32);
 759       break;
 760
 761    case GL_RGB10_A2UI:
 762       RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UINT);
 763       RETURN_IF_SUPPORTED(MESA_FORMAT_R10G10B10A2_UINT);
 764       break;
 765
 766    case GL_BGRA:
 767       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 768       break;
 769
 770    case GL_STENCIL_INDEX:
 771    case GL_STENCIL_INDEX8:
 772       RETURN_IF_SUPPORTED(MESA_FORMAT_S_UINT8);
 773       break;
 774
 775    default:
 776       /* For non-generic compressed format we assert two things:
 777        *
 778        * 1. The format has already been validated against the set of available
 779        *    extensions.
 780        *
 781        * 2. The driver only enables the extension if it supports all of the
 782        *    formats that are part of that extension.
 783        */
 784       if (_mesa_is_compressed_format(ctx, internalFormat))
 785          return _mesa_glenum_to_compressed_format(internalFormat);
 786    }
 787
 788    _mesa_problem(ctx, "unexpected format %s in _mesa_choose_tex_format()",
 789                  _mesa_enum_to_string(internalFormat));
 790    return MESA_FORMAT_NONE;
 791 }