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 "enums.h"
  38 #include "mfeatures.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, GLint internalFormat,
  65                          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          }
  79          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
  80          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
  81          break;
  82
  83       case GL_RGBA8:
  84          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
  85          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
  86          break;
  87       case GL_RGB5_A1:
  88          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB1555);
  89          break;
  90       case GL_RGBA2:
  91          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444_REV); /* just to test another format*/
  92          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  93          break;
  94       case GL_RGBA4:
  95          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB4444);
  96          break;
  97
  98       /* deep RGBA formats */
  99       case GL_RGB10_A2:
 100          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB2101010);
 101          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 102          break;
 103       case GL_RGBA12:
 104       case GL_RGBA16:
 105          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 106          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 107          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
 108          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 109          break;
 110
 111       /* shallow RGB formats */
 112       case 3:
 113       case GL_RGB:
 114       case GL_RGB8:
 115          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 116          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 117          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 118          break;
 119       case GL_R3_G3_B2:
 120          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB332);
 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_RGB4:
 126          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565_REV); /* just to test another format */
 127          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 128          break;
 129       case GL_RGB5:
 130          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB565);
 131          break;
 132
 133       /* deep RGB formats */
 134       case GL_RGB10:
 135       case GL_RGB12:
 136       case GL_RGB16:
 137          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_16);
 138          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 139          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 140          break;
 141
 142       /* Alpha formats */
 143       case GL_ALPHA:
 144       case GL_ALPHA4:
 145       case GL_ALPHA8:
 146          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 147          break;
 148
 149       case GL_ALPHA12:
 150       case GL_ALPHA16:
 151          RETURN_IF_SUPPORTED(MESA_FORMAT_A16);
 152          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 153          break;
 154
 155       /* Luminance formats */
 156       case 1:
 157       case GL_LUMINANCE:
 158       case GL_LUMINANCE4:
 159       case GL_LUMINANCE8:
 160          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 161          break;
 162
 163       case GL_LUMINANCE12:
 164       case GL_LUMINANCE16:
 165          RETURN_IF_SUPPORTED(MESA_FORMAT_L16);
 166          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 167          break;
 168
 169       /* Luminance/Alpha formats */
 170       case GL_LUMINANCE4_ALPHA4:
 171          RETURN_IF_SUPPORTED(MESA_FORMAT_AL44);
 172          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 173          break;
 174
 175       case 2:
 176       case GL_LUMINANCE_ALPHA:
 177       case GL_LUMINANCE6_ALPHA2:
 178       case GL_LUMINANCE8_ALPHA8:
 179          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 180          break;
 181
 182       case GL_LUMINANCE12_ALPHA4:
 183       case GL_LUMINANCE12_ALPHA12:
 184       case GL_LUMINANCE16_ALPHA16:
 185          RETURN_IF_SUPPORTED(MESA_FORMAT_AL1616);
 186          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 187          break;
 188
 189       case GL_INTENSITY:
 190       case GL_INTENSITY4:
 191       case GL_INTENSITY8:
 192          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 193          break;
 194
 195       case GL_INTENSITY12:
 196       case GL_INTENSITY16:
 197          RETURN_IF_SUPPORTED(MESA_FORMAT_I16);
 198          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 199          break;
 200
 201       default:
 202          ; /* fallthrough */
 203    }
 204
 205    if (ctx->Extensions.ARB_depth_texture) {
 206       switch (internalFormat) {
 207          case GL_DEPTH_COMPONENT:
 208          case GL_DEPTH_COMPONENT24:
 209          case GL_DEPTH_COMPONENT32:
 210             RETURN_IF_SUPPORTED(MESA_FORMAT_Z32);
 211             RETURN_IF_SUPPORTED(MESA_FORMAT_X8_Z24);
 212             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 213             break;
 214          case GL_DEPTH_COMPONENT16:
 215             RETURN_IF_SUPPORTED(MESA_FORMAT_Z16);
 216             RETURN_IF_SUPPORTED(MESA_FORMAT_X8_Z24);
 217             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 218          default:
 219             ; /* fallthrough */
 220       }
 221    }
 222
 223    switch (internalFormat) {
 224       case GL_COMPRESSED_ALPHA_ARB:
 225          RETURN_IF_SUPPORTED(MESA_FORMAT_A8);
 226          break;
 227       case GL_COMPRESSED_LUMINANCE_ARB:
 228          RETURN_IF_SUPPORTED(MESA_FORMAT_L8);
 229          break;
 230       case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
 231          RETURN_IF_SUPPORTED(MESA_FORMAT_AL88);
 232          break;
 233       case GL_COMPRESSED_INTENSITY_ARB:
 234          RETURN_IF_SUPPORTED(MESA_FORMAT_I8);
 235          break;
 236       case GL_COMPRESSED_RGB_ARB:
 237          if (ctx->Extensions.EXT_texture_compression_s3tc ||
 238              ctx->Extensions.S3_s3tc)
 239             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 240          if (ctx->Extensions.TDFX_texture_compression_FXT1)
 241             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 242          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB888);
 243          RETURN_IF_SUPPORTED(MESA_FORMAT_XRGB8888);
 244          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 245          break;
 246       case GL_COMPRESSED_RGBA_ARB:
 247          if (ctx->Extensions.EXT_texture_compression_s3tc ||
 248              ctx->Extensions.S3_s3tc)
 249             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
 250          if (ctx->Extensions.TDFX_texture_compression_FXT1)
 251             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 252          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA8888);
 253          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 254          break;
 255       default:
 256          ; /* fallthrough */
 257    }
 258
 259    if (ctx->Extensions.MESA_ycbcr_texture) {
 260       if (internalFormat == GL_YCBCR_MESA) {
 261          if (type == GL_UNSIGNED_SHORT_8_8_MESA)
 262             RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
 263          else
 264             RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
 265       }
 266    }
 267
 268 #if FEATURE_texture_fxt1
 269    if (ctx->Extensions.TDFX_texture_compression_FXT1) {
 270       switch (internalFormat) {
 271          case GL_COMPRESSED_RGB_FXT1_3DFX:
 272             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 273          break;
 274          case GL_COMPRESSED_RGBA_FXT1_3DFX:
 275             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 276          break;
 277          default:
 278             ; /* fallthrough */
 279       }
 280    }
 281 #endif
 282
 283 #if FEATURE_texture_s3tc
 284    if (ctx->Extensions.EXT_texture_compression_s3tc) {
 285       switch (internalFormat) {
 286          case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 287             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 288             break;
 289          case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 290             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT1);
 291             break;
 292          case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 293             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
 294             break;
 295          case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 296             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT5);
 297             break;
 298          default:
 299             ; /* fallthrough */
 300       }
 301    }
 302
 303    if (ctx->Extensions.S3_s3tc) {
 304       switch (internalFormat) {
 305          case GL_RGB_S3TC:
 306          case GL_RGB4_S3TC:
 307             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 308             break;
 309          case GL_RGBA_S3TC:
 310          case GL_RGBA4_S3TC:
 311             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3);
 312             break;
 313          default:
 314             ; /* fallthrough */
 315       }
 316    }
 317 #endif
 318
 319    if (ctx->Extensions.ARB_texture_float) {
 320       switch (internalFormat) {
 321          case GL_ALPHA16F_ARB:
 322             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
 323             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
 324             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 325             break;
 326          case GL_ALPHA32F_ARB:
 327             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT32);
 328             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 329             RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_FLOAT16);
 330             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 331             break;
 332          case GL_LUMINANCE16F_ARB:
 333             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
 334             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
 335             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 336             break;
 337          case GL_LUMINANCE32F_ARB:
 338             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT32);
 339             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 340             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_FLOAT16);
 341             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 342             break;
 343          case GL_LUMINANCE_ALPHA16F_ARB:
 344             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
 345             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
 346             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 347             break;
 348          case GL_LUMINANCE_ALPHA32F_ARB:
 349             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32);
 350             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 351             RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16);
 352             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 353             break;
 354          case GL_INTENSITY16F_ARB:
 355             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
 356             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
 357             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 358             break;
 359          case GL_INTENSITY32F_ARB:
 360             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT32);
 361             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 362             RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_FLOAT16);
 363             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 364             break;
 365          case GL_RGB16F_ARB:
 366             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 367             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 368             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 369             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 370             break;
 371          case GL_RGB32F_ARB:
 372             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 373             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 374             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 375             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 376             break;
 377          case GL_RGBA16F_ARB:
 378             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 379             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 380             break;
 381          case GL_RGBA32F_ARB:
 382             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 383             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 384             break;
 385          default:
 386             ; /* fallthrough */
 387       }
 388    }
 389
 390    if (ctx->Extensions.EXT_texture_shared_exponent) {
 391       switch (internalFormat) {
 392          case GL_RGB9_E5:
 393             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_RGB9_E5_FLOAT]);
 394             return MESA_FORMAT_RGB9_E5_FLOAT;
 395          default:
 396             ; /* fallthrough */
 397       }
 398    }
 399
 400    if (ctx->Extensions.EXT_packed_float) {
 401       switch (internalFormat) {
 402          case GL_R11F_G11F_B10F:
 403             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_R11_G11_B10_FLOAT]);
 404             return MESA_FORMAT_R11_G11_B10_FLOAT;
 405          default:
 406             ; /* fallthrough */
 407       }
 408    }
 409
 410    if (ctx->Extensions.EXT_packed_depth_stencil) {
 411       switch (internalFormat) {
 412          case GL_DEPTH_STENCIL_EXT:
 413          case GL_DEPTH24_STENCIL8_EXT:
 414             RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_S8);
 415             RETURN_IF_SUPPORTED(MESA_FORMAT_S8_Z24);
 416             break;
 417          default:
 418             ; /* fallthrough */
 419       }
 420    }
 421
 422    if (ctx->Extensions.ARB_depth_buffer_float) {
 423       switch (internalFormat) {
 424          case GL_DEPTH_COMPONENT32F:
 425             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT]);
 426             return MESA_FORMAT_Z32_FLOAT;
 427          case GL_DEPTH32F_STENCIL8:
 428             ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT_X24S8]);
 429             return MESA_FORMAT_Z32_FLOAT_X24S8;
 430          default:
 431             ; /* fallthrough */
 432       }
 433    }
 434
 435    if (ctx->Extensions.ATI_envmap_bumpmap) {
 436       switch (internalFormat) {
 437          case GL_DUDV_ATI:
 438          case GL_DU8DV8_ATI:
 439             RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
 440             break;
 441          default:
 442             ; /* fallthrough */
 443       }
 444    }
 445
 446    if (ctx->Extensions.EXT_texture_snorm) {
 447       switch (internalFormat) {
 448          case GL_RED_SNORM:
 449          case GL_R8_SNORM:
 450             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R8);
 451             break;
 452          case GL_RG_SNORM:
 453          case GL_RG8_SNORM:
 454             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG88_REV);
 455             break;
 456          case GL_RGB_SNORM:
 457          case GL_RGB8_SNORM:
 458             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
 459             /* FALLTHROUGH */
 460          case GL_RGBA_SNORM:
 461          case GL_RGBA8_SNORM:
 462             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 463             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 464             break;
 465          case GL_ALPHA_SNORM:
 466          case GL_ALPHA8_SNORM:
 467             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_A8);
 468             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 469             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 470             break;
 471          case GL_LUMINANCE_SNORM:
 472          case GL_LUMINANCE8_SNORM:
 473             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L8);
 474             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBX8888);
 475             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 476             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 477             break;
 478          case GL_LUMINANCE_ALPHA_SNORM:
 479          case GL_LUMINANCE8_ALPHA8_SNORM:
 480             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_AL88);
 481             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 482             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 483             break;
 484          case GL_INTENSITY_SNORM:
 485          case GL_INTENSITY8_SNORM:
 486             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_I8);
 487             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 488             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 489             break;
 490          case GL_R16_SNORM:
 491             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_R16);
 492             break;
 493          case GL_RG16_SNORM:
 494             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_GR1616);
 495             break;
 496          case GL_RGB16_SNORM:
 497             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGB_16);
 498             /* FALLTHROUGH */
 499          case GL_RGBA16_SNORM:
 500             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 501             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 502             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 503             break;
 504          case GL_ALPHA16_SNORM:
 505             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_A16);
 506             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 507             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 508             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 509             break;
 510          case GL_LUMINANCE16_SNORM:
 511             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L16);
 512             /* FALLTHROUGH */
 513          case GL_LUMINANCE16_ALPHA16_SNORM:
 514             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_AL1616);
 515             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 516             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 517             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 518             break;
 519          case GL_INTENSITY16_SNORM:
 520             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_I16);
 521             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA_16);
 522             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888);
 523             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RGBA8888_REV);
 524             break;
 525          default:
 526             ; /* fall-through */
 527       }
 528    }
 529
 530 #if FEATURE_EXT_texture_sRGB
 531    if (ctx->Extensions.EXT_texture_sRGB) {
 532       switch (internalFormat) {
 533          case GL_SRGB_EXT:
 534          case GL_SRGB8_EXT:
 535             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
 536             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 537             break;
 538          case GL_SRGB_ALPHA_EXT:
 539          case GL_SRGB8_ALPHA8_EXT:
 540             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
 541             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 542             break;
 543          case GL_SLUMINANCE_EXT:
 544          case GL_SLUMINANCE8_EXT:
 545             RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
 546             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 547             break;
 548          case GL_SLUMINANCE_ALPHA_EXT:
 549          case GL_SLUMINANCE8_ALPHA8_EXT:
 550             RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
 551             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 552             break;
 553          case GL_COMPRESSED_SLUMINANCE_EXT:
 554             RETURN_IF_SUPPORTED(MESA_FORMAT_SL8);
 555             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 556             break;
 557          case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 558             RETURN_IF_SUPPORTED(MESA_FORMAT_SLA8);
 559             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 560             break;
 561          case GL_COMPRESSED_SRGB_EXT:
 562 #if FEATURE_texture_s3tc
 563             if (ctx->Extensions.EXT_texture_compression_s3tc)
 564                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 565 #endif
 566             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB8);
 567             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 568             break;
 569          case GL_COMPRESSED_SRGB_ALPHA_EXT:
 570 #if FEATURE_texture_s3tc
 571             if (ctx->Extensions.EXT_texture_compression_s3tc)
 572                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
 573 #endif
 574             RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA8);
 575             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 576             break;
 577 #if FEATURE_texture_s3tc
 578          case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
 579             if (ctx->Extensions.EXT_texture_compression_s3tc)
 580                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 581             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 582             break;
 583          case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
 584             if (ctx->Extensions.EXT_texture_compression_s3tc)
 585                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT1);
 586             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 587             break;
 588          case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
 589             if (ctx->Extensions.EXT_texture_compression_s3tc)
 590                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3);
 591             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 592             break;
 593          case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
 594             if (ctx->Extensions.EXT_texture_compression_s3tc)
 595                RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT5);
 596             RETURN_IF_SUPPORTED(MESA_FORMAT_SARGB8);
 597             break;
 598 #endif
 599          default:
 600             ; /* fallthrough */
 601       }
 602    }
 603 #endif /* FEATURE_EXT_texture_sRGB */
 604
 605    if (ctx->Extensions.EXT_texture_integer) {
 606       switch (internalFormat) {
 607       case GL_ALPHA8UI_EXT:
 608          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT8);
 609          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 610          break;
 611       case GL_ALPHA16UI_EXT:
 612          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT16);
 613          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 614          break;
 615       case GL_ALPHA32UI_EXT:
 616          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_UINT32);
 617          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 618          break;
 619       case GL_ALPHA8I_EXT:
 620          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT8);
 621          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 622          break;
 623       case GL_ALPHA16I_EXT:
 624          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT16);
 625          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 626          break;
 627       case GL_ALPHA32I_EXT:
 628          RETURN_IF_SUPPORTED(MESA_FORMAT_ALPHA_INT32);
 629          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 630          break;
 631       case GL_LUMINANCE8UI_EXT:
 632          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT8);
 633          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 634          break;
 635       case GL_LUMINANCE16UI_EXT:
 636          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT16);
 637          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 638          break;
 639       case GL_LUMINANCE32UI_EXT:
 640          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_UINT32);
 641          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 642          break;
 643       case GL_LUMINANCE8I_EXT:
 644          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT8);
 645          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 646          break;
 647       case GL_LUMINANCE16I_EXT:
 648          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT16);
 649          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 650          break;
 651       case GL_LUMINANCE32I_EXT:
 652          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_INT32);
 653          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 654          break;
 655       case GL_LUMINANCE_ALPHA8UI_EXT:
 656          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT8);
 657          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 658          break;
 659       case GL_LUMINANCE_ALPHA16UI_EXT:
 660          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT16);
 661          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 662          break;
 663       case GL_LUMINANCE_ALPHA32UI_EXT:
 664          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_UINT32);
 665          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 666          break;
 667       case GL_LUMINANCE_ALPHA8I_EXT:
 668          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT8);
 669          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 670          break;
 671       case GL_LUMINANCE_ALPHA16I_EXT:
 672          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT16);
 673          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 674          break;
 675       case GL_LUMINANCE_ALPHA32I_EXT:
 676          RETURN_IF_SUPPORTED(MESA_FORMAT_LUMINANCE_ALPHA_INT32);
 677          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 678          break;
 679       case GL_INTENSITY8UI_EXT:
 680          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT8);
 681          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 682          break;
 683       case GL_INTENSITY16UI_EXT:
 684          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT16);
 685          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 686          break;
 687       case GL_INTENSITY32UI_EXT:
 688          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_UINT32);
 689          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 690          break;
 691       case GL_INTENSITY8I_EXT:
 692          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT8);
 693          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 694          break;
 695       case GL_INTENSITY16I_EXT:
 696          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT16);
 697          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 698          break;
 699       case GL_INTENSITY32I_EXT:
 700          RETURN_IF_SUPPORTED(MESA_FORMAT_INTENSITY_INT32);
 701          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 702          break;
 703       case GL_RGB8UI_EXT:
 704          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
 705          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 706          break;
 707       case GL_RGB16UI_EXT:
 708          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT16);
 709          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 710          break;
 711       case GL_RGB32UI_EXT:
 712          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT32);
 713          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 714          break;
 715       case GL_RGB8I_EXT:
 716          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT8);
 717          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 718          break;
 719       case GL_RGB16I_EXT:
 720          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT16);
 721          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 722          break;
 723       case GL_RGB32I_EXT:
 724          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT32);
 725          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 726          break;
 727       case GL_RGBA8UI_EXT:
 728          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 729          break;
 730       case GL_RGBA16UI_EXT:
 731          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 732          break;
 733       case GL_RGBA32UI_EXT:
 734          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 735          break;
 736       case GL_RGBA8I_EXT:
 737          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 738          break;
 739       case GL_RGBA16I_EXT:
 740          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 741          break;
 742       case GL_RGBA32I_EXT:
 743          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 744          break;
 745       }
 746    }
 747
 748    if (ctx->Extensions.ARB_texture_rg) {
 749       switch (internalFormat) {
 750       case GL_R8:
 751       case GL_RED:
 752          RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
 753          break;
 754
 755       case GL_COMPRESSED_RED:
 756          RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
 757          RETURN_IF_SUPPORTED(MESA_FORMAT_R8);
 758          break;
 759
 760       case GL_R16:
 761          RETURN_IF_SUPPORTED(MESA_FORMAT_R16);
 762          break;
 763
 764       case GL_RG:
 765       case GL_RG8:
 766          RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
 767          break;
 768
 769       case GL_COMPRESSED_RG:
 770          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
 771          RETURN_IF_SUPPORTED(MESA_FORMAT_RG88);
 772          break;
 773
 774       case GL_RG16:
 775          RETURN_IF_SUPPORTED(MESA_FORMAT_RG1616);
 776          break;
 777
 778       default:
 779          ; /* fallthrough */
 780       }
 781    }
 782
 783    if (ctx->Extensions.ARB_texture_rg && ctx->Extensions.ARB_texture_float) {
 784       switch (internalFormat) {
 785       case GL_R16F:
 786          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 787          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 788          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 789          break;
 790       case GL_R32F:
 791          RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 792          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 793          break;
 794       case GL_RG16F:
 795          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 796          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 797          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 798          break;
 799       case GL_RG32F:
 800          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 801          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 802          break;
 803
 804       default:
 805          ; /* fallthrough */
 806       }
 807    }
 808
 809    if (ctx->Extensions.ARB_texture_rg && ctx->Extensions.EXT_texture_integer) {
 810       switch (internalFormat) {
 811       case GL_R8UI:
 812          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);
 813          break;
 814       case GL_RG8UI:
 815          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT8);
 816          break;
 817       case GL_R16UI:
 818          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT16);
 819          break;
 820       case GL_RG16UI:
 821          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT16);
 822          break;
 823       case GL_R32UI:
 824          RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT32);
 825          break;
 826       case GL_RG32UI:
 827          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT32);
 828          break;
 829       case GL_R8I:
 830          RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT8);
 831          break;
 832       case GL_RG8I:
 833          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT8);
 834          break;
 835       case GL_R16I:
 836          RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT16);
 837          break;
 838       case GL_RG16I:
 839          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT16);
 840          break;
 841       case GL_R32I:
 842          RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT32);
 843          break;
 844       case GL_RG32I:
 845          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT32);
 846          break;
 847       default:
 848          break;
 849       }
 850    }
 851
 852    /* GL_BGRA can be an internal format *only* in OpenGL ES (1.x or 2.0).
 853     */
 854    if (ctx->API != API_OPENGL) {
 855       switch (internalFormat) {
 856       case GL_BGRA:
 857          RETURN_IF_SUPPORTED(MESA_FORMAT_ARGB8888);
 858          break;
 859
 860       default:
 861          ; /* fallthrough */
 862       }
 863    }
 864
 865    if (ctx->Extensions.ARB_texture_compression_rgtc) {
 866       switch (internalFormat) {
 867          case GL_COMPRESSED_RED_RGTC1:
 868             RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
 869             break;
 870          case GL_COMPRESSED_SIGNED_RED_RGTC1:
 871             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RED_RGTC1);
 872             break;
 873          case GL_COMPRESSED_RG_RGTC2:
 874             RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
 875             break;
 876          case GL_COMPRESSED_SIGNED_RG_RGTC2:
 877             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_RG_RGTC2);
 878             break;
 879          default:
 880             ; /* fallthrough */
 881       }
 882    }
 883
 884    if (ctx->Extensions.EXT_texture_compression_latc) {
 885       switch (internalFormat) {
 886          case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
 887             RETURN_IF_SUPPORTED(MESA_FORMAT_L_LATC1);
 888             break;
 889          case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
 890             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_L_LATC1);
 891             break;
 892          case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
 893             RETURN_IF_SUPPORTED(MESA_FORMAT_LA_LATC2);
 894             break;
 895          case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
 896             RETURN_IF_SUPPORTED(MESA_FORMAT_SIGNED_LA_LATC2);
 897             break;
 898          default:
 899             ; /* fallthrough */
 900       }
 901    }
 902
 903    if (ctx->Extensions.ATI_texture_compression_3dc) {
 904       switch (internalFormat) {
 905          case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
 906             RETURN_IF_SUPPORTED(MESA_FORMAT_LA_LATC2);
 907             break;
 908          default:
 909             ; /* fallthrough */
 910       }
 911    }
 912
 913    _mesa_problem(ctx, "unexpected format %s in _mesa_choose_tex_format()",
 914                  _mesa_lookup_enum_by_nr(internalFormat));
 915    return MESA_FORMAT_NONE;
 916 }
 917