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