src/mesa/main/texformat.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.7
   4  *
   5  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   6  * Copyright (c) 2008-2009 VMware, Inc.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included
  16  * in all copies or substantial portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  23  * CONNECTION WITH THE SOFTWARE OR THE USE OR 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 "mtypes.h"
  38 #include "texcompress.h"
  39 #include "texformat.h"
  40
  41 #define RETURN_IF_SUPPORTED(f) do {             \
  42    if (ctx->TextureFormatSupported[f])          \
  43       return f;                                 \
  44 } while (0)
  45
  46 /**
  47  * Choose an appropriate texture format given the format, type and
  48  * internalFormat parameters passed to glTexImage().
  49  *
  50  * \param ctx  the GL context.
  51  * \param internalFormat  user's prefered internal texture format.
  52  * \param format  incoming image pixel format.
  53  * \param type  incoming image data type.
  54  *
  55  * \return a pointer to a gl_texture_format object which describes the
  56  * choosen texture format, or NULL on failure.
  57  *
  58  * This is called via dd_function_table::ChooseTextureFormat.  Hardware drivers
  59  * will typically override this function with a specialized version.
  60  */
  61 gl_format
  62 _mesa_choose_tex_format( struct gl_context *ctx, GLint internalFormat,
  63                          GLenum format, GLenum type )
  64 {
  65    (void) format;
  66    (void) type;
  67
  68    switch (internalFormat) {
  69       /* shallow RGBA formats */
  70       case 4:
  71       case GL_RGBA:
  72          if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
  73             RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  74          } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
  75             RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
  76          }
  77          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
  78          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
  79          break;
  80
  81       case GL_RGBA8:
  82          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
  83          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
  84          break;
  85       case GL_RGB5_A1:
  86          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
  87          break;
  88       case GL_RGBA2:
  89          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/
  90          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  91          break;
  92       case GL_RGBA4:
  93          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  94          break;
  95
  96       /* deep RGBA formats */
  97       case GL_RGB10_A2:
  98          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
  99          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 100          break;
 101       case GL_RGBA12:
 102       case GL_RGBA16:
 103          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 104          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 105          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
 106          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 107          break;
 108
 109       /* shallow RGB formats */
 110       case 3:
 111       case GL_RGB:
 112       case GL_RGB8:
 113          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 114          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 115          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 116          break;
 117       case GL_R3_G3_B2:
 118          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);
 119          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 120          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 121          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 122          break;
 123       case GL_RGB4:
 124          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */
 125          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 126          break;
 127       case GL_RGB5:
 128          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 129          break;
 130
 131       /* deep RGB formats */
 132       case GL_RGB10:
 133       case GL_RGB12:
 134       case GL_RGB16:
 135          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 136          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 137          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 138          break;
 139
 140       /* Alpha formats */
 141       case GL_ALPHA:
 142       case GL_ALPHA4:
 143       case GL_ALPHA8:
 144          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 145          break;
 146
 147       case GL_ALPHA12:
 148       case GL_ALPHA16:
 149          RETURN_IF_SUPPORTED(MESA_FORMAT_A16);
 150          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 151          break;
 152
 153       /* Luminance formats */
 154       case 1:
 155       case GL_LUMINANCE:
 156       case GL_LUMINANCE4:
 157       case GL_LUMINANCE8:
 158          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 159          break;
 160
 161       case GL_LUMINANCE12:
 162       case GL_LUMINANCE16:
 163          RETURN_IF_SUPPORTED(MESA_FORMAT_L16);
 164          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 165          break;
 166
 167       /* Luminance/Alpha formats */
 168       case GL_LUMINANCE4_ALPHA4:
 169          RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);
 170          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 171          break;
 172
 173       case 2:
 174       case GL_LUMINANCE_ALPHA:
 175       case GL_LUMINANCE6_ALPHA2:
 176       case GL_LUMINANCE8_ALPHA8:
 177          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 178          break;
 179
 180       case GL_LUMINANCE12_ALPHA4:
 181       case GL_LUMINANCE12_ALPHA12:
 182       case GL_LUMINANCE16_ALPHA16:
 183          RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);
 184          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 185          break;
 186
 187       case GL_INTENSITY:
 188       case GL_INTENSITY4:
 189       case GL_INTENSITY8:
 190          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 191          break;
 192
 193       case GL_INTENSITY12:
 194       case GL_INTENSITY16:
 195          RETURN_IF_SUPPORTED(MESA_FORMAT_I16);
 196          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 197          break;
 198
 199       case GL_COLOR_INDEX:
 200       case GL_COLOR_INDEX1_EXT:
 201       case GL_COLOR_INDEX2_EXT:
 202       case GL_COLOR_INDEX4_EXT:
 203       case GL_COLOR_INDEX12_EXT:
 204       case GL_COLOR_INDEX16_EXT:
 205       case GL_COLOR_INDEX8_EXT:
 206          RETURN_IF_SUPPORTED(MESA_FORMAT_CI8);
 207          break;
 208
 209       default:
 210          ; /* fallthrough */
 211    }
 212
 213    if (ctx->Extensions.ARB_depth_texture) {
 214       switch (internalFormat) {
 215          case GL_DEPTH_COMPONENT:
 216          case GL_DEPTH_COMPONENT24:
 217          case GL_DEPTH_COMPONENT32:
 218             RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);
 219             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 220             break;
 221          case GL_DEPTH_COMPONENT16:
 222             RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);
 223             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 224          default:
 225             ; /* fallthrough */
 226       }
 227    }
 228
 229    switch (internalFormat) {
 230       case GL_COMPRESSED_ALPHA_ARB:
 231          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 232          break;
 233       case GL_COMPRESSED_LUMINANCE_ARB:
 234          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 235          break;
 236       case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
 237          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 238          break;
 239       case GL_COMPRESSED_INTENSITY_ARB:
 240          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 241          break;
 242       case GL_COMPRESSED_RGB_ARB:
 243          if (ctx->Extensions.EXT_texture_compression_s3tc ||
 244              ctx->Extensions.S3_s3tc)
 245             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 246          if (ctx->Extensions.TDFX_texture_compression_FXT1)
 247             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 248          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 249          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 250          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 251          break;
 252       case GL_COMPRESSED_RGBA_ARB:
 253          if (ctx->Extensions.EXT_texture_compression_s3tc ||
 254              ctx->Extensions.S3_s3tc)
 255             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
 256          if (ctx->Extensions.TDFX_texture_compression_FXT1)
 257             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 258          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
 259          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 260          break;
 261       default:
 262          ; /* fallthrough */
 263    }
 264
 265    if (ctx->Extensions.MESA_ycbcr_texture) {
 266       if (internalFormat == GL_YCBCR_MESA) {
 267          if (type == GL_UNSIGNED_SHORT_8_8_MESA)
 268             RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
 269          else
 270             RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
 271       }
 272    }
 273
 274 #if FEATURE_texture_fxt1
 275    if (ctx->Extensions.TDFX_texture_compression_FXT1) {
 276       switch (internalFormat) {
 277          case GL_COMPRESSED_RGB_FXT1_3DFX:
 278             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 279          break;
 280          case GL_COMPRESSED_RGBA_FXT1_3DFX:
 281             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 282          break;
 283          default:
 284             ; /* fallthrough */
 285       }
 286    }
 287 #endif
 288
 289 #if FEATURE_texture_s3tc
 290    if (ctx->Extensions.EXT_texture_compression_s3tc) {
 291       switch (internalFormat) {
 292          case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 293             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 294             break;
 295          case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 296             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT1);
 297             break;
 298          case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 299             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
 300             break;
 301          case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 302             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT5);
 303             break;
 304          default:
 305             ; /* fallthrough */
 306       }
 307    }
 308
 309    if (ctx->Extensions.S3_s3tc) {
 310       switch (internalFormat) {
 311          case GL_RGB_S3TC:
 312          case GL_RGB4_S3TC:
 313             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 314             break;
 315          case GL_RGBA_S3TC:
 316          case GL_RGBA4_S3TC:
 317             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
 318             break;
 319          default:
 320             ; /* fallthrough */
 321       }
 322    }
 323 #endif
 324
 325    if (ctx->Extensions.ARB_texture_float) {
 326       switch (internalFormat) {
 327          case GL_ALPHA16F_ARB:
 328             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
 329             break;
 330          case GL_ALPHA32F_ARB:
 331             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
 332             break;
 333          case GL_LUMINANCE16F_ARB:
 334             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
 335             break;
 336          case GL_LUMINANCE32F_ARB:
 337             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
 338             break;
 339          case GL_LUMINANCE_ALPHA16F_ARB:
 340             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
 341             break;
 342          case GL_LUMINANCE_ALPHA32F_ARB:
 343             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
 344             break;
 345          case GL_INTENSITY16F_ARB:
 346             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
 347             break;
 348          case GL_INTENSITY32F_ARB:
 349             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
 350             break;
 351          case GL_RGB16F_ARB:
 352             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 353             break;
 354          case GL_RGB32F_ARB:
 355             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 356             break;
 357          case GL_RGBA16F_ARB:
 358             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 359             break;
 360          case GL_RGBA32F_ARB:
 361             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 362             break;
 363          default:
 364             ; /* fallthrough */
 365       }
 366    }
 367
 368    if (ctx->Extensions.EXT_packed_depth_stencil) {
 369       switch (internalFormat) {
 370          case GL_DEPTH_STENCIL_EXT:
 371          case GL_DEPTH24_STENCIL8_EXT:
 372             RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);
 373             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 374             break;
 375          default:
 376             ; /* fallthrough */
 377       }
 378    }
 379
 380    if (ctx->Extensions.ATI_envmap_bumpmap) {
 381       switch (internalFormat) {
 382          case GL_DUDV_ATI:
 383          case GL_DU8DV8_ATI:
 384             RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
 385             break;
 386          default:
 387             ; /* fallthrough */
 388       }
 389    }
 390
 391    if (ctx->Extensions.MESA_texture_signed_rgba) {
 392       switch (internalFormat) {
 393          case GL_RGBA_SNORM:
 394          case GL_RGBA8_SNORM:
 395             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 396             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 397             break;
 398          default:
 399             ; /* fallthrough */
 400       }
 401    }
 402
 403    if (ctx->VersionMajor * 10 + ctx->VersionMinor >= 31) {
 404       switch (internalFormat) {
 405          case GL_RED_SNORM:
 406          case GL_R8_SNORM:
 407             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);
 408             break;
 409          case GL_RG_SNORM:
 410          case GL_RG8_SNORM:
 411             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88);
 412             break;
 413          case GL_RGB_SNORM:
 414          case GL_RGB8_SNORM:
 415             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
 416             break;
 417          case GL_RGBA_SNORM:
 418          case GL_RGBA8_SNORM:
 419             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 420             break;
 421          case GL_R16_SNORM:
 422             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R_16);
 423             break;
 424          case GL_RG16_SNORM:
 425             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_16);
 426             break;
 427          case GL_RGB16_SNORM:
 428             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);
 429             break;
 430          case GL_RGBA16_SNORM:
 431             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 432             break;
 433          default:
 434             ; /* fall-through */
 435       }
 436    }
 437
 438 #if FEATURE_EXT_texture_sRGB
 439    if (ctx->Extensions.EXT_texture_sRGB) {
 440       switch (internalFormat) {
 441          case GL_SRGB_EXT:
 442          case GL_SRGB8_EXT:
 443             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
 444             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 445             break;
 446          case GL_SRGB_ALPHA_EXT:
 447          case GL_SRGB8_ALPHA8_EXT:
 448             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
 449             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 450             break;
 451          case GL_SLUMINANCE_EXT:
 452          case GL_SLUMINANCE8_EXT:
 453             RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
 454             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 455             break;
 456          case GL_SLUMINANCE_ALPHA_EXT:
 457          case GL_SLUMINANCE8_ALPHA8_EXT:
 458             RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
 459             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 460             break;
 461          case GL_COMPRESSED_SLUMINANCE_EXT:
 462             RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
 463             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 464             break;
 465          case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 466             RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
 467             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 468             break;
 469          case GL_COMPRESSED_SRGB_EXT:
 470 #if FEATURE_texture_s3tc
 471             if (ctx->Extensions.EXT_texture_compression_s3tc)
 472                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 473 #endif
 474             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
 475             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 476             break;
 477          case GL_COMPRESSED_SRGB_ALPHA_EXT:
 478 #if FEATURE_texture_s3tc
 479             if (ctx->Extensions.EXT_texture_compression_s3tc)
 480                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
 481 #endif
 482             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
 483             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 484             break;
 485 #if FEATURE_texture_s3tc
 486          case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
 487             if (ctx->Extensions.EXT_texture_compression_s3tc)
 488                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 489             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 490             break;
 491          case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
 492             if (ctx->Extensions.EXT_texture_compression_s3tc)
 493                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT1);
 494             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 495             break;
 496          case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
 497             if (ctx->Extensions.EXT_texture_compression_s3tc)
 498                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3);
 499             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 500             break;
 501          case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
 502             if (ctx->Extensions.EXT_texture_compression_s3tc)
 503                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT5);
 504             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 505             break;
 506 #endif
 507          default:
 508             ; /* fallthrough */
 509       }
 510    }
 511 #endif /* FEATURE_EXT_texture_sRGB */
 512
 513    if (ctx->Extensions.EXT_texture_integer) {
 514       switch (internalFormat) {
 515       case GL_RGBA32UI_EXT:
 516       case GL_RGB32UI_EXT:
 517       case GL_ALPHA32UI_EXT:
 518       case GL_INTENSITY32UI_EXT:
 519       case GL_LUMINANCE32UI_EXT:
 520       case GL_LUMINANCE_ALPHA32UI_EXT:
 521          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 522          break;
 523       case GL_RGBA16UI_EXT:
 524       case GL_RGB16UI_EXT:
 525       case GL_ALPHA16UI_EXT:
 526       case GL_INTENSITY16UI_EXT:
 527       case GL_LUMINANCE16UI_EXT:
 528       case GL_LUMINANCE_ALPHA16UI_EXT:
 529          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 530          break;
 531       case GL_RGBA8UI_EXT:
 532       case GL_RGB8UI_EXT:
 533       case GL_ALPHA8UI_EXT:
 534       case GL_INTENSITY8UI_EXT:
 535       case GL_LUMINANCE8UI_EXT:
 536       case GL_LUMINANCE_ALPHA8UI_EXT:
 537          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 538          break;
 539       case GL_RGBA32I_EXT:
 540       case GL_RGB32I_EXT:
 541       case GL_ALPHA32I_EXT:
 542       case GL_INTENSITY32I_EXT:
 543       case GL_LUMINANCE32I_EXT:
 544       case GL_LUMINANCE_ALPHA32I_EXT:
 545          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 546          break;
 547       case GL_RGBA16I_EXT:
 548       case GL_RGB16I_EXT:
 549       case GL_ALPHA16I_EXT:
 550       case GL_INTENSITY16I_EXT:
 551       case GL_LUMINANCE16I_EXT:
 552       case GL_LUMINANCE_ALPHA16I_EXT:
 553          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 554          break;
 555       case GL_RGBA8I_EXT:
 556       case GL_RGB8I_EXT:
 557       case GL_ALPHA8I_EXT:
 558       case GL_INTENSITY8I_EXT:
 559       case GL_LUMINANCE8I_EXT:
 560       case GL_LUMINANCE_ALPHA8I_EXT:
 561          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 562          break;
 563       }
 564    }
 565
 566    if (ctx->Extensions.ARB_texture_rg) {
 567       switch (internalFormat) {
 568       case GL_R8:
 569       case GL_RED:
 570       case GL_COMPRESSED_RED:
 571          RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
 572          break;
 573
 574       case GL_R16:
 575          RETURN_IF_SUPPORTED(MESA_FORMAT_R16);
 576          break;
 577
 578       case GL_RG:
 579       case GL_RG8:
 580       case GL_COMPRESSED_RG:
 581          RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
 582          break;
 583
 584       case GL_RG16:
 585          RETURN_IF_SUPPORTED(MESA_FORMAT_RG1616);
 586          break;
 587
 588       default:
 589          ; /* fallthrough */
 590       }
 591    }
 592
 593    _mesa_problem(ctx, "unexpected format in _mesa_choose_tex_format()");
 594    return MESA_FORMAT_NONE;
 595 }
 596