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       RETURN_IF_SUPPORTED(MESA_FORMAT_A1B5G5R5_UNORM);
  92       break;
  93    case GL_RGBA2:
  94       RETURN_IF_SUPPORTED(MESA_FORMAT_A4R4G4B4_UNORM); /* just to test another format*/
  95       RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  96       break;
  97    case GL_RGBA4:
  98       RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  99       break;
 100
 101    /* deep RGBA formats */
 102    case GL_RGB10_A2:
 103       RETURN_IF_SUPPORTED(MESA_FORMAT_R10G10B10A2_UNORM);
 104       RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
 105       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 106       break;
 107    case GL_RGBA12:
 108    case GL_RGBA16:
 109       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 110       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 111       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
 112       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 113       break;
 114
 115    /* shallow RGB formats */
 116    case 3:
 117    case GL_RGB:
 118       if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 119          RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
 120       }
 121       if (type == GL_UNSIGNED_SHORT_5_6_5) {
 122          RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 123       }
 124       /* fallthrough */
 125    case GL_RGB8:
 126       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UNORM8);
 127       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8X8_UNORM);
 128       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_UNORM);
 129
 130       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 131       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 132       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 133       break;
 134    case GL_R3_G3_B2:
 135       RETURN_IF_SUPPORTED(MESA_FORMAT_B2G3R3_UNORM);
 136       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 137       RETURN_IF_SUPPORTED(MESA_FORMAT_R5G6B5_UNORM);
 138       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 139       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 140       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 141       break;
 142    case GL_RGB4:
 143       RETURN_IF_SUPPORTED(MESA_FORMAT_R5G6B5_UNORM); /* just to test another format */
 144       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 145       break;
 146    case GL_RGB5:
 147       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 148       break;
 149
 150    /* deep RGB formats */
 151    case GL_RGB10:
 152    case GL_RGB12:
 153    case GL_RGB16:
 154       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UNORM16);
 155       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 156       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 157       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 158       break;
 159
 160    /* Alpha formats */
 161    case GL_ALPHA:
 162    case GL_ALPHA4:
 163    case GL_ALPHA8:
 164       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 165       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 166       break;
 167
 168    case GL_ALPHA12:
 169    case GL_ALPHA16:
 170       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM16);
 171       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 172       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 173       break;
 174
 175    /* Luminance formats */
 176    case 1:
 177    case GL_LUMINANCE:
 178    case GL_LUMINANCE4:
 179    case GL_LUMINANCE8:
 180       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 181       break;
 182
 183    case GL_LUMINANCE12:
 184    case GL_LUMINANCE16:
 185       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM16);
 186       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 187       break;
 188
 189       /* Luminance/Alpha formats */
 190    case GL_LUMINANCE4_ALPHA4:
 191       RETURN_IF_SUPPORTED(MESA_FORMAT_L4A4_UNORM);
 192       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 193       break;
 194
 195    case 2:
 196    case GL_LUMINANCE_ALPHA:
 197    case GL_LUMINANCE6_ALPHA2:
 198    case GL_LUMINANCE8_ALPHA8:
 199       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 200       break;
 201
 202    case GL_LUMINANCE12_ALPHA4:
 203    case GL_LUMINANCE12_ALPHA12:
 204    case GL_LUMINANCE16_ALPHA16:
 205       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM16);
 206       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 207       break;
 208
 209    case GL_INTENSITY:
 210    case GL_INTENSITY4:
 211    case GL_INTENSITY8:
 212       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 213       break;
 214
 215    case GL_INTENSITY12:
 216    case GL_INTENSITY16:
 217       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM16);
 218       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 219       break;
 220
 221    case GL_DEPTH_COMPONENT:
 222    case GL_DEPTH_COMPONENT24:
 223    case GL_DEPTH_COMPONENT32:
 224       RETURN_IF_SUPPORTED(MESA_FORMAT_Z_UNORM32);
 225       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 226       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 227       break;
 228    case GL_DEPTH_COMPONENT16:
 229       RETURN_IF_SUPPORTED(MESA_FORMAT_Z_UNORM16);
 230       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 231       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 232       break;
 233
 234    case GL_COMPRESSED_ALPHA_ARB:
 235       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 236       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 237       break;
 238    case GL_COMPRESSED_LUMINANCE_ARB:
 239       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 240       break;
 241    case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
 242       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UNORM8);
 243       break;
 244    case GL_COMPRESSED_INTENSITY_ARB:
 245       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 246       break;
 247    case GL_COMPRESSED_RGB_ARB:
 248       /* We don't use texture compression for 1D and 1D array textures.
 249        * For 1D textures, compressions doesn't buy us much.
 250        * For 1D ARRAY textures, there's complicated issues with updating
 251        * sub-regions on non-block boundaries with glCopyTexSubImage, among
 252        * other issues.  FWIW, the GL_EXT_texture_array extension prohibits
 253        * 1D ARRAY textures in S3TC format.
 254        */
 255       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 256          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 257       }
 258       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 259       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 260       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 261       break;
 262    case GL_COMPRESSED_RGBA_ARB:
 263       /* We don't use texture compression for 1D and 1D array textures. */
 264       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 265          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
 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_RG_SNORM8);
 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_LA_SNORM8);
 413       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 414       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 415       break;
 416    case GL_INTENSITY_SNORM:
 417    case GL_INTENSITY8_SNORM:
 418       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SNORM8);
 419       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 420       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 421       break;
 422    case GL_R16_SNORM:
 423       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SNORM16);
 424       break;
 425    case GL_RG16_SNORM:
 426       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SNORM16);
 427       break;
 428    case GL_RGB16_SNORM:
 429       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SNORM16);
 430       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SNORM16);
 431       /* FALLTHROUGH */
 432    case GL_RGBA16_SNORM:
 433       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 434       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 435       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 436       break;
 437    case GL_ALPHA16_SNORM:
 438       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SNORM16);
 439       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 440       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 441       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 442       break;
 443    case GL_LUMINANCE16_SNORM:
 444       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SNORM16);
 445       /* FALLTHROUGH */
 446    case GL_LUMINANCE16_ALPHA16_SNORM:
 447       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SNORM16);
 448       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 449       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 450       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 451       break;
 452    case GL_INTENSITY16_SNORM:
 453       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SNORM16);
 454       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 455       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 456       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 457       break;
 458
 459    case GL_SRGB_EXT:
 460    case GL_SRGB8_EXT:
 461       /* there is no MESA_FORMAT_RGB_SRGB8 */
 462       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8X8_SRGB);
 463       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SRGB);
 464
 465       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
 466       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 467
 468       RETURN_IF_SUPPORTED(MESA_FORMAT_X8B8G8R8_SRGB);
 469       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 470       break;
 471    case GL_SRGB_ALPHA_EXT:
 472    case GL_SRGB8_ALPHA8_EXT:
 473       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SRGB);
 474
 475       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
 476       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 477       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 478       break;
 479    case GL_SR8_EXT:
 480       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SRGB8);
 481       break;
 482    case GL_SLUMINANCE_EXT:
 483    case GL_SLUMINANCE8_EXT:
 484       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SRGB8);
 485       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 486       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 487       break;
 488    case GL_SLUMINANCE_ALPHA_EXT:
 489    case GL_SLUMINANCE8_ALPHA8_EXT:
 490       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SRGB8);
 491       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 492       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 493       break;
 494    case GL_COMPRESSED_SLUMINANCE_EXT:
 495       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SRGB8);
 496       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 497       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 498       break;
 499    case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 500       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SRGB8);
 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       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 506       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
 507       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 508       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 509       break;
 510    case GL_COMPRESSED_SRGB_ALPHA_EXT:
 511       RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
 512       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
 513       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 514       RETURN_IF_SUPPORTED(MESA_FORMAT_A8R8G8B8_SRGB);
 515       break;
 516
 517    case GL_ALPHA8UI_EXT:
 518       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT8);
 519       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 520       break;
 521    case GL_ALPHA16UI_EXT:
 522       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT16);
 523       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 524       break;
 525    case GL_ALPHA32UI_EXT:
 526       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT32);
 527       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 528       break;
 529    case GL_ALPHA8I_EXT:
 530       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT8);
 531       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 532       break;
 533    case GL_ALPHA16I_EXT:
 534       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT16);
 535       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 536       break;
 537    case GL_ALPHA32I_EXT:
 538       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT32);
 539       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 540       break;
 541    case GL_LUMINANCE8UI_EXT:
 542       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT8);
 543       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 544       break;
 545    case GL_LUMINANCE16UI_EXT:
 546       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT16);
 547       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 548       break;
 549    case GL_LUMINANCE32UI_EXT:
 550       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT32);
 551       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 552       break;
 553    case GL_LUMINANCE8I_EXT:
 554       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT8);
 555       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 556       break;
 557    case GL_LUMINANCE16I_EXT:
 558       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT16);
 559       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 560       break;
 561    case GL_LUMINANCE32I_EXT:
 562       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT32);
 563       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 564       break;
 565    case GL_LUMINANCE_ALPHA8UI_EXT:
 566       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT8);
 567       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 568       break;
 569    case GL_LUMINANCE_ALPHA16UI_EXT:
 570       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT16);
 571       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 572       break;
 573    case GL_LUMINANCE_ALPHA32UI_EXT:
 574       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT32);
 575       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 576       break;
 577    case GL_LUMINANCE_ALPHA8I_EXT:
 578       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT8);
 579       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 580       break;
 581    case GL_LUMINANCE_ALPHA16I_EXT:
 582       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT16);
 583       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 584       break;
 585    case GL_LUMINANCE_ALPHA32I_EXT:
 586       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT32);
 587       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 588       break;
 589    case GL_INTENSITY8UI_EXT:
 590       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT8);
 591       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 592       break;
 593    case GL_INTENSITY16UI_EXT:
 594       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT16);
 595       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 596       break;
 597    case GL_INTENSITY32UI_EXT:
 598       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT32);
 599       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 600       break;
 601    case GL_INTENSITY8I_EXT:
 602       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT8);
 603       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 604       break;
 605    case GL_INTENSITY16I_EXT:
 606       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT16);
 607       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 608       break;
 609    case GL_INTENSITY32I_EXT:
 610       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT32);
 611       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 612       break;
 613
 614    case GL_RGB8UI_EXT:
 615       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
 616       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT8);
 617       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 618       break;
 619    case GL_RGB16UI_EXT:
 620       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT16);
 621       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT16);
 622       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 623       break;
 624    case GL_RGB32UI_EXT:
 625       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT32);
 626       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT32);
 627       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 628       break;
 629    case GL_RGB8I_EXT:
 630       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SINT8);
 631       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT8);
 632       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 633       break;
 634    case GL_RGB16I_EXT:
 635       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SINT16);
 636       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT16);
 637       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 638       break;
 639    case GL_RGB32I_EXT:
 640       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SINT32);
 641       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT32);
 642       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 643       break;
 644    case GL_RGBA8UI_EXT:
 645       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 646       break;
 647    case GL_RGBA16UI_EXT:
 648       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 649       break;
 650    case GL_RGBA32UI_EXT:
 651       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 652       break;
 653    case GL_RGBA8I_EXT:
 654       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT8);
 655       break;
 656    case GL_RGBA16I_EXT:
 657       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT16);
 658       break;
 659    case GL_RGBA32I_EXT:
 660       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SINT32);
 661       break;
 662
 663    case GL_R8:
 664    case GL_RED:
 665       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM8);
 666       break;
 667
 668    case GL_COMPRESSED_RED:
 669       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 670          RETURN_IF_SUPPORTED(MESA_FORMAT_R_RGTC1_UNORM);
 671       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM8);
 672       break;
 673
 674    case GL_R16:
 675       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM16);
 676       break;
 677
 678    case GL_RG:
 679    case GL_RG8:
 680       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UNORM8);
 681       break;
 682
 683    case GL_COMPRESSED_RG:
 684       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 685          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2_UNORM);
 686       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UNORM8);
 687       break;
 688
 689    case GL_RG16:
 690       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UNORM16);
 691       break;
 692
 693    case GL_R16F:
 694       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 695       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 696       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 697       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 698       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 699       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 700       break;
 701    case GL_R32F:
 702       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 703       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 704       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 705       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 706       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 707       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 708       break;
 709    case GL_RG16F:
 710       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 711       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 712       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 713       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 714       break;
 715    case GL_RG32F:
 716       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 717       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 718       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 719       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 720       break;
 721
 722    case GL_R8UI:
 723       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);
 724       break;
 725    case GL_RG8UI:
 726       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT8);
 727       break;
 728    case GL_R16UI:
 729       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT16);
 730       break;
 731    case GL_RG16UI:
 732       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT16);
 733       break;
 734    case GL_R32UI:
 735       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT32);
 736       break;
 737    case GL_RG32UI:
 738       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT32);
 739       break;
 740    case GL_R8I:
 741       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SINT8);
 742       break;
 743    case GL_RG8I:
 744       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SINT8);
 745       break;
 746    case GL_R16I:
 747       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SINT16);
 748       break;
 749    case GL_RG16I:
 750       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SINT16);
 751       break;
 752    case GL_R32I:
 753       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SINT32);
 754       break;
 755    case GL_RG32I:
 756       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_SINT32);
 757       break;
 758
 759    case GL_RGB10_A2UI:
 760       RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UINT);
 761       RETURN_IF_SUPPORTED(MESA_FORMAT_R10G10B10A2_UINT);
 762       break;
 763
 764    case GL_BGRA:
 765       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 766       break;
 767
 768    case GL_STENCIL_INDEX:
 769    case GL_STENCIL_INDEX8:
 770       RETURN_IF_SUPPORTED(MESA_FORMAT_S_UINT8);
 771       break;
 772
 773    default:
 774       /* For non-generic compressed format we assert two things:
 775        *
 776        * 1. The format has already been validated against the set of available
 777        *    extensions.
 778        *
 779        * 2. The driver only enables the extension if it supports all of the
 780        *    formats that are part of that extension.
 781        */
 782       if (_mesa_is_compressed_format(ctx, internalFormat))
 783          return _mesa_glenum_to_compressed_format(internalFormat);
 784    }
 785
 786    _mesa_problem(ctx, "unexpected format %s in _mesa_choose_tex_format()",
 787                  _mesa_enum_to_string(internalFormat));
 788    return MESA_FORMAT_NONE;
 789 }