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  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  22  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  23  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  24  * OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27
  28 /**
  29  * \file texformat.c
  30  * Texture formats.
  31  *
  32  * \author Gareth Hughes
  33  * \author Brian Paul
  34  */
  35
  36
  37 #include "context.h"
  38 #include "enums.h"
  39 #include "mtypes.h"
  40 #include "texcompress.h"
  41 #include "texformat.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 internalFormat  user's prefered internal texture format.
  54  * \param format  incoming image pixel format.
  55  * \param type  incoming image data type.
  56  *
  57  * \return a pointer to a gl_texture_format object which describes the
  58  * choosen texture format, or NULL on failure.
  59  *
  60  * This is called via dd_function_table::ChooseTextureFormat.  Hardware drivers
  61  * will typically override this function with a specialized version.
  62  */
  63 gl_format
  64 _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
  65                         GLint internalFormat, GLenum format, GLenum type)
  66 {
  67    (void) format;
  68    (void) type;
  69
  70    switch (internalFormat) {
  71       /* shallow RGBA formats */
  72       case 4:
  73       case GL_RGBA:
  74          if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
  75             RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  76          } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
  77             RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
  78          } else if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
  79             RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
  80          }
  81          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
  82          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
  83          break;
  84
  85       case GL_RGBA8:
  86          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
  87          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
  88          break;
  89       case GL_RGB5_A1:
  90          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
  91          break;
  92       case GL_RGBA2:
  93          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/
  94          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  95          break;
  96       case GL_RGBA4:
  97          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  98          break;
  99
 100       /* deep RGBA formats */
 101       case GL_RGB10_A2:
 102          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
 103          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 104          break;
 105       case GL_RGBA12:
 106       case GL_RGBA16:
 107          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 108          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 109          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
 110          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 111          break;
 112
 113       /* shallow RGB formats */
 114       case 3:
 115       case GL_RGB:
 116          if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 117             RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
 118          }
 119          /* fallthrough */
 120       case GL_RGB8:
 121          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 122          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 123          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 124          break;
 125       case GL_R3_G3_B2:
 126          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);
 127          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 128          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV);
 129          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 130          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 131          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 132          break;
 133       case GL_RGB4:
 134          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */
 135          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 136          break;
 137       case GL_RGB5:
 138          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 139          break;
 140
 141       /* deep RGB formats */
 142       case GL_RGB10:
 143       case GL_RGB12:
 144       case GL_RGB16:
 145          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR16161616_UNORM);
 146          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 147          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 148          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 149          break;
 150
 151       /* Alpha formats */
 152       case GL_ALPHA:
 153       case GL_ALPHA4:
 154       case GL_ALPHA8:
 155          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 156          break;
 157
 158       case GL_ALPHA12:
 159       case GL_ALPHA16:
 160          RETURN_IF_SUPPORTED(MESA_FORMAT_A16);
 161          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 162          break;
 163
 164       /* Luminance formats */
 165       case 1:
 166       case GL_LUMINANCE:
 167       case GL_LUMINANCE4:
 168       case GL_LUMINANCE8:
 169          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 170          break;
 171
 172       case GL_LUMINANCE12:
 173       case GL_LUMINANCE16:
 174          RETURN_IF_SUPPORTED(MESA_FORMAT_L16);
 175          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 176          break;
 177
 178       /* Luminance/Alpha formats */
 179       case GL_LUMINANCE4_ALPHA4:
 180          RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);
 181          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 182          break;
 183
 184       case 2:
 185       case GL_LUMINANCE_ALPHA:
 186       case GL_LUMINANCE6_ALPHA2:
 187       case GL_LUMINANCE8_ALPHA8:
 188          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 189          break;
 190
 191       case GL_LUMINANCE12_ALPHA4:
 192       case GL_LUMINANCE12_ALPHA12:
 193       case GL_LUMINANCE16_ALPHA16:
 194          RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);
 195          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 196          break;
 197
 198       case GL_INTENSITY:
 199       case GL_INTENSITY4:
 200       case GL_INTENSITY8:
 201          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 202          break;
 203
 204       case GL_INTENSITY12:
 205       case GL_INTENSITY16:
 206          RETURN_IF_SUPPORTED(MESA_FORMAT_I16);
 207          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 208          break;
 209
 210       default:
 211          ; /* fallthrough */
 212    }
 213
 214    if (ctx->Extensions.ARB_depth_texture) {
 215       switch (internalFormat) {
 216          case GL_DEPTH_COMPONENT:
 217          case GL_DEPTH_COMPONENT24:
 218          case GL_DEPTH_COMPONENT32:
 219             RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);
 220             RETURN_IF_SUPPORTED(MESA_FORMAT_X8_Z24);
 221             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 222             break;
 223          case GL_DEPTH_COMPONENT16:
 224             RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);
 225             RETURN_IF_SUPPORTED(MESA_FORMAT_X8_Z24);
 226             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 227          default:
 228             ; /* fallthrough */
 229       }
 230    }
 231
 232    switch (internalFormat) {
 233       case GL_COMPRESSED_ALPHA_ARB:
 234          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 235          break;
 236       case GL_COMPRESSED_LUMINANCE_ARB:
 237          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 238          break;
 239       case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
 240          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 241          break;
 242       case GL_COMPRESSED_INTENSITY_ARB:
 243          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 244          break;
 245       case GL_COMPRESSED_RGB_ARB:
 246          /* We don't use texture compression for 1D and 1D array textures.
 247           * For 1D textures, compressions doesn't buy us much.
 248           * For 1D ARRAY textures, there's complicated issues with updating
 249           * sub-regions on non-block boundaries with glCopyTexSubImage, among
 250           * other issues.  FWIW, the GL_EXT_texture_array extension prohibits
 251           * 1D ARRAY textures in S3TC format.
 252           */
 253          if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 254             if (ctx->Extensions.EXT_texture_compression_s3tc ||
 255                 ctx->Extensions.ANGLE_texture_compression_dxt)
 256                RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 257             if (ctx->Extensions.TDFX_texture_compression_FXT1)
 258                RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 259          }
 260          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 261          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 262          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 263          break;
 264       case GL_COMPRESSED_RGBA_ARB:
 265          /* We don't use texture compression for 1D and 1D array textures. */
 266          if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 267             if (ctx->Extensions.EXT_texture_compression_s3tc ||
 268                 ctx->Extensions.ANGLE_texture_compression_dxt)
 269                RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
 270             if (ctx->Extensions.TDFX_texture_compression_FXT1)
 271                RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 272          }
 273          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
 274          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 275          break;
 276       default:
 277          ; /* fallthrough */
 278    }
 279
 280    if (ctx->Extensions.ARB_ES2_compatibility) {
 281       switch (internalFormat) {
 282          case GL_RGB565:
 283             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 284             break;
 285          default:
 286          ; /* fallthrough */
 287       }
 288    }
 289
 290    if (ctx->Extensions.MESA_ycbcr_texture) {
 291       if (internalFormat == GL_YCBCR_MESA) {
 292          if (type == GL_UNSIGNED_SHORT_8_8_MESA)
 293             RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
 294          else
 295             RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
 296       }
 297    }
 298
 299    /* For non-generic compressed format we assert two things:
 300     *
 301     * 1. The format has already been validated against the set of available
 302     *    extensions.
 303     *
 304     * 2. The driver only enables the extension if it supports all of the
 305     *    formats that are part of that extension.
 306     */
 307    switch (internalFormat) {
 308    case GL_COMPRESSED_RGB_FXT1_3DFX:
 309       return MESA_FORMAT_RGB_FXT1;
 310    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 311       return MESA_FORMAT_RGBA_FXT1;
 312    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 313    case GL_RGB_S3TC:
 314    case GL_RGB4_S3TC:
 315       return MESA_FORMAT_RGB_DXT1;
 316    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 317       return MESA_FORMAT_RGBA_DXT1;
 318    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 319    case GL_RGBA_S3TC:
 320    case GL_RGBA4_S3TC:
 321       return MESA_FORMAT_RGBA_DXT3;
 322    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 323       return MESA_FORMAT_RGBA_DXT5;
 324    case GL_COMPRESSED_RED_RGTC1:
 325       return MESA_FORMAT_RED_RGTC1;
 326    case GL_COMPRESSED_SIGNED_RED_RGTC1:
 327       return MESA_FORMAT_SIGNED_RED_RGTC1;
 328    case GL_COMPRESSED_RG_RGTC2:
 329       return MESA_FORMAT_RG_RGTC2;
 330    case GL_COMPRESSED_SIGNED_RG_RGTC2:
 331       return MESA_FORMAT_SIGNED_RG_RGTC2;
 332    case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
 333       return MESA_FORMAT_L_LATC1;
 334    case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
 335       return MESA_FORMAT_SIGNED_L_LATC1;
 336    case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
 337       return MESA_FORMAT_LA_LATC2;
 338    case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
 339       return MESA_FORMAT_SIGNED_LA_LATC2;
 340    case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
 341       return MESA_FORMAT_LA_LATC2;
 342    case GL_ETC1_RGB8_OES:
 343       return MESA_FORMAT_ETC1_RGB8;
 344    case GL_COMPRESSED_RGB8_ETC2:
 345       return MESA_FORMAT_ETC2_RGB8;
 346    case GL_COMPRESSED_SRGB8_ETC2:
 347       return MESA_FORMAT_ETC2_SRGB8;
 348    case GL_COMPRESSED_RGBA8_ETC2_EAC:
 349       return MESA_FORMAT_ETC2_RGBA8_EAC;
 350    case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
 351       return MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC;
 352    case GL_COMPRESSED_R11_EAC:
 353       return MESA_FORMAT_ETC2_R11_EAC;
 354    case GL_COMPRESSED_RG11_EAC:
 355       return MESA_FORMAT_ETC2_RG11_EAC;
 356    case GL_COMPRESSED_SIGNED_R11_EAC:
 357       return MESA_FORMAT_ETC2_SIGNED_R11_EAC;
 358    case GL_COMPRESSED_SIGNED_RG11_EAC:
 359       return MESA_FORMAT_ETC2_SIGNED_RG11_EAC;
 360    case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
 361       return MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
 362    case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
 363       return MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1;
 364    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
 365       return MESA_FORMAT_SRGB_DXT1;
 366    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
 367       return MESA_FORMAT_SRGBA_DXT1;
 368    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
 369       return MESA_FORMAT_SRGBA_DXT3;
 370    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
 371       return MESA_FORMAT_SRGBA_DXT5;
 372    default:
 373       ; /* fallthrough */
 374    }
 375
 376    if (ctx->Extensions.ARB_texture_float) {
 377       switch (internalFormat) {
 378          case GL_ALPHA16F_ARB:
 379             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
 380             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
 381             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 382             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 383             break;
 384          case GL_ALPHA32F_ARB:
 385             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
 386             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 387             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
 388             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 389             break;
 390          case GL_LUMINANCE16F_ARB:
 391             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
 392             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
 393             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 394             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 395             break;
 396          case GL_LUMINANCE32F_ARB:
 397             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
 398             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 399             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
 400             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 401             break;
 402          case GL_LUMINANCE_ALPHA16F_ARB:
 403             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
 404             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
 405             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 406             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 407             break;
 408          case GL_LUMINANCE_ALPHA32F_ARB:
 409             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
 410             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 411             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
 412             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 413             break;
 414          case GL_INTENSITY16F_ARB:
 415             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
 416             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
 417             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 418             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 419             break;
 420          case GL_INTENSITY32F_ARB:
 421             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
 422             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 423             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
 424             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 425             break;
 426          case GL_RGB16F_ARB:
 427             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 428             RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR16161616_FLOAT);
 429             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 430             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 431             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 432             break;
 433          case GL_RGB32F_ARB:
 434             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 435             RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR32323232_FLOAT);
 436             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 437             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 438             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 439             break;
 440          case GL_RGBA16F_ARB:
 441             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 442             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 443             break;
 444          case GL_RGBA32F_ARB:
 445             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 446             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 447             break;
 448          default:
 449             ; /* fallthrough */
 450       }
 451    }
 452
 453    if (ctx->Extensions.EXT_texture_shared_exponent) {
 454       switch (internalFormat) {
 455          case GL_RGB9_E5:
 456             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_RGB9_E5_FLOAT]);
 457             return MESA_FORMAT_RGB9_E5_FLOAT;
 458          default:
 459             ; /* fallthrough */
 460       }
 461    }
 462
 463    if (ctx->Extensions.EXT_packed_float) {
 464       switch (internalFormat) {
 465          case GL_R11F_G11F_B10F:
 466             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_R11_G11_B10_FLOAT]);
 467             return MESA_FORMAT_R11_G11_B10_FLOAT;
 468          default:
 469             ; /* fallthrough */
 470       }
 471    }
 472
 473    if (ctx->Extensions.EXT_packed_depth_stencil) {
 474       switch (internalFormat) {
 475          case GL_DEPTH_STENCIL_EXT:
 476          case GL_DEPTH24_STENCIL8_EXT:
 477             RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);
 478             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 479             break;
 480          default:
 481             ; /* fallthrough */
 482       }
 483    }
 484
 485    if (ctx->Extensions.ARB_depth_buffer_float) {
 486       switch (internalFormat) {
 487          case GL_DEPTH_COMPONENT32F:
 488             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT]);
 489             return MESA_FORMAT_Z32_FLOAT;
 490          case GL_DEPTH32F_STENCIL8:
 491             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT_X24S8]);
 492             return MESA_FORMAT_Z32_FLOAT_X24S8;
 493          default:
 494             ; /* fallthrough */
 495       }
 496    }
 497
 498    if (ctx->Extensions.ATI_envmap_bumpmap) {
 499       switch (internalFormat) {
 500          case GL_DUDV_ATI:
 501          case GL_DU8DV8_ATI:
 502             RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
 503             break;
 504          default:
 505             ; /* fallthrough */
 506       }
 507    }
 508
 509    if (ctx->Extensions.EXT_texture_snorm) {
 510       switch (internalFormat) {
 511          case GL_RED_SNORM:
 512          case GL_R8_SNORM:
 513             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);
 514             break;
 515          case GL_RG_SNORM:
 516          case GL_RG8_SNORM:
 517             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88_REV);
 518             break;
 519          case GL_RGB_SNORM:
 520          case GL_RGB8_SNORM:
 521             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
 522             /* FALLTHROUGH */
 523          case GL_RGBA_SNORM:
 524          case GL_RGBA8_SNORM:
 525             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 526             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 527             break;
 528          case GL_ALPHA_SNORM:
 529          case GL_ALPHA8_SNORM:
 530             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_A8);
 531             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 532             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 533             break;
 534          case GL_LUMINANCE_SNORM:
 535          case GL_LUMINANCE8_SNORM:
 536             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L8);
 537             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
 538             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 539             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 540             break;
 541          case GL_LUMINANCE_ALPHA_SNORM:
 542          case GL_LUMINANCE8_ALPHA8_SNORM:
 543             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_AL88);
 544             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 545             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 546             break;
 547          case GL_INTENSITY_SNORM:
 548          case GL_INTENSITY8_SNORM:
 549             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_I8);
 550             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 551             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 552             break;
 553          case GL_R16_SNORM:
 554             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R16);
 555             break;
 556          case GL_RG16_SNORM:
 557             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_GR1616);
 558             break;
 559          case GL_RGB16_SNORM:
 560             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);
 561             RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR16161616_SNORM);
 562             /* FALLTHROUGH */
 563          case GL_RGBA16_SNORM:
 564             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 565             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 566             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 567             break;
 568          case GL_ALPHA16_SNORM:
 569             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_A16);
 570             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 571             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 572             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 573             break;
 574          case GL_LUMINANCE16_SNORM:
 575             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L16);
 576             /* FALLTHROUGH */
 577          case GL_LUMINANCE16_ALPHA16_SNORM:
 578             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_AL1616);
 579             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 580             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 581             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 582             break;
 583          case GL_INTENSITY16_SNORM:
 584             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_I16);
 585             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 586             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 587             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 588             break;
 589          default:
 590             ; /* fall-through */
 591       }
 592    }
 593
 594    if (ctx->Extensions.EXT_texture_sRGB) {
 595       switch (internalFormat) {
 596          case GL_SRGB_EXT:
 597          case GL_SRGB8_EXT:
 598             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
 599             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 600             break;
 601          case GL_SRGB_ALPHA_EXT:
 602          case GL_SRGB8_ALPHA8_EXT:
 603             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
 604             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 605             break;
 606          case GL_SLUMINANCE_EXT:
 607          case GL_SLUMINANCE8_EXT:
 608             RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
 609             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 610             break;
 611          case GL_SLUMINANCE_ALPHA_EXT:
 612          case GL_SLUMINANCE8_ALPHA8_EXT:
 613             RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
 614             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 615             break;
 616          case GL_COMPRESSED_SLUMINANCE_EXT:
 617             RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
 618             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 619             break;
 620          case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 621             RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
 622             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 623             break;
 624          case GL_COMPRESSED_SRGB_EXT:
 625             if (ctx->Extensions.EXT_texture_compression_s3tc)
 626                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 627             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
 628             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 629             break;
 630          case GL_COMPRESSED_SRGB_ALPHA_EXT:
 631             if (ctx->Extensions.EXT_texture_compression_s3tc)
 632                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
 633             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
 634             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 635             break;
 636          default:
 637             ; /* fallthrough */
 638       }
 639    }
 640
 641    if (ctx->Extensions.EXT_texture_integer) {
 642       switch (internalFormat) {
 643       case GL_ALPHA8UI_EXT:
 644          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT8);
 645          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 646          break;
 647       case GL_ALPHA16UI_EXT:
 648          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT16);
 649          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 650          break;
 651       case GL_ALPHA32UI_EXT:
 652          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT32);
 653          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 654          break;
 655       case GL_ALPHA8I_EXT:
 656          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT8);
 657          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 658          break;
 659       case GL_ALPHA16I_EXT:
 660          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT16);
 661          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 662          break;
 663       case GL_ALPHA32I_EXT:
 664          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT32);
 665          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 666          break;
 667       case GL_LUMINANCE8UI_EXT:
 668          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT8);
 669          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 670          break;
 671       case GL_LUMINANCE16UI_EXT:
 672          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT16);
 673          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 674          break;
 675       case GL_LUMINANCE32UI_EXT:
 676          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT32);
 677          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 678          break;
 679       case GL_LUMINANCE8I_EXT:
 680          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT8);
 681          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 682          break;
 683       case GL_LUMINANCE16I_EXT:
 684          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT16);
 685          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 686          break;
 687       case GL_LUMINANCE32I_EXT:
 688          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT32);
 689          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 690          break;
 691       case GL_LUMINANCE_ALPHA8UI_EXT:
 692          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT8);
 693          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 694          break;
 695       case GL_LUMINANCE_ALPHA16UI_EXT:
 696          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT16);
 697          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 698          break;
 699       case GL_LUMINANCE_ALPHA32UI_EXT:
 700          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT32);
 701          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 702          break;
 703       case GL_LUMINANCE_ALPHA8I_EXT:
 704          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT8);
 705          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 706          break;
 707       case GL_LUMINANCE_ALPHA16I_EXT:
 708          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT16);
 709          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 710          break;
 711       case GL_LUMINANCE_ALPHA32I_EXT:
 712          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT32);
 713          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 714          break;
 715       case GL_INTENSITY8UI_EXT:
 716          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT8);
 717          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 718          break;
 719       case GL_INTENSITY16UI_EXT:
 720          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT16);
 721          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 722          break;
 723       case GL_INTENSITY32UI_EXT:
 724          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT32);
 725          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 726          break;
 727       case GL_INTENSITY8I_EXT:
 728          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT8);
 729          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 730          break;
 731       case GL_INTENSITY16I_EXT:
 732          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT16);
 733          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 734          break;
 735       case GL_INTENSITY32I_EXT:
 736          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT32);
 737          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 738          break;
 739       }
 740    }
 741
 742    if (ctx->Version >= 30 ||
 743        ctx->Extensions.EXT_texture_integer) {
 744       switch (internalFormat) {
 745       case GL_RGB8UI_EXT:
 746          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
 747          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR8888_UINT);
 748          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 749          break;
 750       case GL_RGB16UI_EXT:
 751          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT16);
 752          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR16161616_UINT);
 753          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 754          break;
 755       case GL_RGB32UI_EXT:
 756          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT32);
 757          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR32323232_UINT);
 758          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 759          break;
 760       case GL_RGB8I_EXT:
 761          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT8);
 762          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR8888_SINT);
 763          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 764          break;
 765       case GL_RGB16I_EXT:
 766          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT16);
 767          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR16161616_SINT);
 768          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 769          break;
 770       case GL_RGB32I_EXT:
 771          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT32);
 772          RETURN_IF_SUPPORTED(MESA_FORMAT_XBGR32323232_SINT);
 773          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 774          break;
 775       case GL_RGBA8UI_EXT:
 776          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 777          break;
 778       case GL_RGBA16UI_EXT:
 779          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 780          break;
 781       case GL_RGBA32UI_EXT:
 782          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 783          break;
 784       case GL_RGBA8I_EXT:
 785          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 786          break;
 787       case GL_RGBA16I_EXT:
 788          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 789          break;
 790       case GL_RGBA32I_EXT:
 791          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 792          break;
 793       }
 794    }
 795
 796    if (ctx->Extensions.ARB_texture_rg) {
 797       switch (internalFormat) {
 798       case GL_R8:
 799       case GL_RED:
 800          RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
 801          break;
 802
 803       case GL_COMPRESSED_RED:
 804          if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 805             RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
 806          RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
 807          break;
 808
 809       case GL_R16:
 810          RETURN_IF_SUPPORTED(MESA_FORMAT_R16);
 811          break;
 812
 813       case GL_RG:
 814       case GL_RG8:
 815          RETURN_IF_SUPPORTED(MESA_FORMAT_GR88);
 816          break;
 817
 818       case GL_COMPRESSED_RG:
 819          if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 820             RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
 821          RETURN_IF_SUPPORTED(MESA_FORMAT_GR88);
 822          break;
 823
 824       case GL_RG16:
 825          RETURN_IF_SUPPORTED(MESA_FORMAT_GR1616);
 826          break;
 827
 828       default:
 829          ; /* fallthrough */
 830       }
 831    }
 832
 833    if (ctx->Extensions.ARB_texture_rg && ctx->Extensions.ARB_texture_float) {
 834       switch (internalFormat) {
 835       case GL_R16F:
 836          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 837          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 838          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 839          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 840          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 841          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 842          break;
 843       case GL_R32F:
 844          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 845          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 846          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 847          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 848          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 849          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 850          break;
 851       case GL_RG16F:
 852          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 853          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 854          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 855          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 856          break;
 857       case GL_RG32F:
 858          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 859          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 860          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 861          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 862          break;
 863
 864       default:
 865          ; /* fallthrough */
 866       }
 867    }
 868
 869    if (ctx->Version >= 30 ||
 870        (ctx->Extensions.ARB_texture_rg &&
 871         ctx->Extensions.EXT_texture_integer)) {
 872       switch (internalFormat) {
 873       case GL_R8UI:
 874          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);
 875          break;
 876       case GL_RG8UI:
 877          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT8);
 878          break;
 879       case GL_R16UI:
 880          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT16);
 881          break;
 882       case GL_RG16UI:
 883          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT16);
 884          break;
 885       case GL_R32UI:
 886          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT32);
 887          break;
 888       case GL_RG32UI:
 889          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT32);
 890          break;
 891       case GL_R8I:
 892          RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT8);
 893          break;
 894       case GL_RG8I:
 895          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT8);
 896          break;
 897       case GL_R16I:
 898          RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT16);
 899          break;
 900       case GL_RG16I:
 901          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT16);
 902          break;
 903       case GL_R32I:
 904          RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT32);
 905          break;
 906       case GL_RG32I:
 907          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT32);
 908          break;
 909       default:
 910          break;
 911       }
 912    }
 913
 914    if (ctx->Extensions.ARB_texture_rgb10_a2ui) {
 915       switch (internalFormat) {
 916       case GL_RGB10_A2UI:
 917          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010_UINT);
 918          RETURN_IF_SUPPORTED(MESA_FORMAT_ABGR2101010_UINT);
 919          break;
 920       default:
 921          break;
 922       }
 923    }
 924    /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
 925     */
 926    if (_mesa_is_gles(ctx)) {
 927       switch (internalFormat) {
 928       case GL_BGRA:
 929          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 930          break;
 931
 932       default:
 933          ; /* fallthrough */
 934       }
 935    }
 936
 937    _mesa_problem(ctx, "unexpected format %s in _mesa_choose_tex_format()",
 938                  _mesa_lookup_enum_by_nr(internalFormat));
 939    return MESA_FORMAT_NONE;
 940 }
 941