src/mesa/main/texformat.c

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
   5  * Copyright (c) 2008-2009 VMware, Inc.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  23  * OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26
  27 /**
  28  * \file texformat.c
  29  * Texture formats.
  30  *
  31  * \author Gareth Hughes
  32  * \author Brian Paul
  33  */
  34
  35
  36 #include "context.h"
  37 #include "enums.h"
  38 #include "mtypes.h"
  39 #include "texcompress.h"
  40 #include "texformat.h"
  41
  42 #define RETURN_IF_SUPPORTED(f) do {             \
  43    if (ctx->TextureFormatSupported[f])          \
  44       return f;                                 \
  45 } while (0)
  46
  47 /**
  48  * Choose an appropriate texture format given the format, type and
  49  * internalFormat parameters passed to glTexImage().
  50  *
  51  * \param ctx  the GL context.
  52  * \param target  a texture target (GL_TEXTURE_x)
  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 the closest mesa_format for the given format/type arguments
  58  *
  59  * This is called via dd_function_table::ChooseTextureFormat.  Hardware
  60  * drivers may override this function with a specialized version.
  61  */
  62 mesa_format
  63 _mesa_choose_tex_format(struct gl_context *ctx, GLenum target,
  64                         GLint internalFormat, GLenum format, GLenum type)
  65 {
  66    (void) format;
  67
  68    switch (internalFormat) {
  69    /* shallow RGBA formats */
  70    case 4:
  71    case GL_RGBA:
  72       if (type == GL_UNSIGNED_SHORT_4_4_4_4_REV) {
  73          RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  74       } else if (type == GL_UNSIGNED_SHORT_1_5_5_5_REV) {
  75          RETURN_IF_SUPPORTED(MESA_FORMAT_B5G5R5A1_UNORM);
  76       } else if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
  77          RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
  78       }
  79       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
  80       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
  81       break;
  82
  83    case GL_RGBA8:
  84       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
  85       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
  86       break;
  87    case GL_RGB5_A1:
  88       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G5R5A1_UNORM);
  89       break;
  90    case GL_RGBA2:
  91       RETURN_IF_SUPPORTED(MESA_FORMAT_A4R4G4B4_UNORM); /* just to test another format*/
  92       RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  93       break;
  94    case GL_RGBA4:
  95       RETURN_IF_SUPPORTED(MESA_FORMAT_B4G4R4A4_UNORM);
  96       break;
  97
  98    /* deep RGBA formats */
  99    case GL_RGB10_A2:
 100       RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
 101       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 102       break;
 103    case GL_RGBA12:
 104    case GL_RGBA16:
 105       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 106       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 107       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
 108       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 109       break;
 110
 111    /* shallow RGB formats */
 112    case 3:
 113    case GL_RGB:
 114       if (type == GL_UNSIGNED_INT_2_10_10_10_REV) {
 115          RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UNORM);
 116       }
 117       /* fallthrough */
 118    case GL_RGB8:
 119       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 120       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 121       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 122       break;
 123    case GL_R3_G3_B2:
 124       RETURN_IF_SUPPORTED(MESA_FORMAT_B2G3R3_UNORM);
 125       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 126       RETURN_IF_SUPPORTED(MESA_FORMAT_R5G6B5_UNORM);
 127       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 128       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 129       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 130       break;
 131    case GL_RGB4:
 132       RETURN_IF_SUPPORTED(MESA_FORMAT_R5G6B5_UNORM); /* just to test another format */
 133       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 134       break;
 135    case GL_RGB5:
 136       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 137       break;
 138
 139    /* deep RGB formats */
 140    case GL_RGB10:
 141    case GL_RGB12:
 142    case GL_RGB16:
 143       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UNORM16);
 144       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UNORM16);
 145       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 146       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 147       break;
 148
 149    /* Alpha formats */
 150    case GL_ALPHA:
 151    case GL_ALPHA4:
 152    case GL_ALPHA8:
 153       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 154       break;
 155
 156    case GL_ALPHA12:
 157    case GL_ALPHA16:
 158       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM16);
 159       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 160       break;
 161
 162    /* Luminance formats */
 163    case 1:
 164    case GL_LUMINANCE:
 165    case GL_LUMINANCE4:
 166    case GL_LUMINANCE8:
 167       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 168       break;
 169
 170    case GL_LUMINANCE12:
 171    case GL_LUMINANCE16:
 172       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM16);
 173       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 174       break;
 175
 176       /* Luminance/Alpha formats */
 177    case GL_LUMINANCE4_ALPHA4:
 178       RETURN_IF_SUPPORTED(MESA_FORMAT_L4A4_UNORM);
 179       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 180       break;
 181
 182    case 2:
 183    case GL_LUMINANCE_ALPHA:
 184    case GL_LUMINANCE6_ALPHA2:
 185    case GL_LUMINANCE8_ALPHA8:
 186       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 187       break;
 188
 189    case GL_LUMINANCE12_ALPHA4:
 190    case GL_LUMINANCE12_ALPHA12:
 191    case GL_LUMINANCE16_ALPHA16:
 192       RETURN_IF_SUPPORTED(MESA_FORMAT_L16A16_UNORM);
 193       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 194       break;
 195
 196    case GL_INTENSITY:
 197    case GL_INTENSITY4:
 198    case GL_INTENSITY8:
 199       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 200       break;
 201
 202    case GL_INTENSITY12:
 203    case GL_INTENSITY16:
 204       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM16);
 205       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 206       break;
 207
 208    case GL_DEPTH_COMPONENT:
 209    case GL_DEPTH_COMPONENT24:
 210    case GL_DEPTH_COMPONENT32:
 211       RETURN_IF_SUPPORTED(MESA_FORMAT_Z_UNORM32);
 212       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 213       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 214       break;
 215    case GL_DEPTH_COMPONENT16:
 216       RETURN_IF_SUPPORTED(MESA_FORMAT_Z_UNORM16);
 217       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_S8_UINT);
 218       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 219       break;
 220
 221    case GL_COMPRESSED_ALPHA_ARB:
 222       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UNORM8);
 223       break;
 224    case GL_COMPRESSED_LUMINANCE_ARB:
 225       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UNORM8);
 226       break;
 227    case GL_COMPRESSED_LUMINANCE_ALPHA_ARB:
 228       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_UNORM);
 229       break;
 230    case GL_COMPRESSED_INTENSITY_ARB:
 231       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UNORM8);
 232       break;
 233    case GL_COMPRESSED_RGB_ARB:
 234       /* We don't use texture compression for 1D and 1D array textures.
 235        * For 1D textures, compressions doesn't buy us much.
 236        * For 1D ARRAY textures, there's complicated issues with updating
 237        * sub-regions on non-block boundaries with glCopyTexSubImage, among
 238        * other issues.  FWIW, the GL_EXT_texture_array extension prohibits
 239        * 1D ARRAY textures in S3TC format.
 240        */
 241       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 242          if (ctx->Mesa_DXTn)
 243             RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_DXT1);
 244          RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FXT1);
 245       }
 246       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_UNORM8);
 247       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8X8_UNORM);
 248       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 249       break;
 250    case GL_COMPRESSED_RGBA_ARB:
 251       /* We don't use texture compression for 1D and 1D array textures. */
 252       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
 253          if (ctx->Mesa_DXTn)
 254             RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_DXT3); /* Not rgba_dxt1, see spec */
 255          RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FXT1);
 256       }
 257       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_UNORM);
 258       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 259       break;
 260
 261    case GL_RGB565:
 262       RETURN_IF_SUPPORTED(MESA_FORMAT_B5G6R5_UNORM);
 263       break;
 264
 265    case GL_YCBCR_MESA:
 266       if (type == GL_UNSIGNED_SHORT_8_8_MESA)
 267          RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR);
 268       else
 269          RETURN_IF_SUPPORTED(MESA_FORMAT_YCBCR_REV);
 270       break;
 271
 272    /* For non-generic compressed format we assert two things:
 273     *
 274     * 1. The format has already been validated against the set of available
 275     *    extensions.
 276     *
 277     * 2. The driver only enables the extension if it supports all of the
 278     *    formats that are part of that extension.
 279     */
 280    case GL_COMPRESSED_RGB_FXT1_3DFX:
 281       return MESA_FORMAT_RGB_FXT1;
 282    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 283       return MESA_FORMAT_RGBA_FXT1;
 284    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 285    case GL_RGB_S3TC:
 286    case GL_RGB4_S3TC:
 287       return MESA_FORMAT_RGB_DXT1;
 288    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 289       return MESA_FORMAT_RGBA_DXT1;
 290    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 291    case GL_RGBA_S3TC:
 292    case GL_RGBA4_S3TC:
 293       return MESA_FORMAT_RGBA_DXT3;
 294    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 295       return MESA_FORMAT_RGBA_DXT5;
 296    case GL_COMPRESSED_RED_RGTC1:
 297       return MESA_FORMAT_RED_RGTC1;
 298    case GL_COMPRESSED_SIGNED_RED_RGTC1:
 299       return MESA_FORMAT_SIGNED_RED_RGTC1;
 300    case GL_COMPRESSED_RG_RGTC2:
 301       return MESA_FORMAT_RG_RGTC2;
 302    case GL_COMPRESSED_SIGNED_RG_RGTC2:
 303       return MESA_FORMAT_SIGNED_RG_RGTC2;
 304    case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
 305       return MESA_FORMAT_L_LATC1;
 306    case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
 307       return MESA_FORMAT_SIGNED_L_LATC1;
 308    case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
 309       return MESA_FORMAT_LA_LATC2;
 310    case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
 311       return MESA_FORMAT_SIGNED_LA_LATC2;
 312    case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
 313       return MESA_FORMAT_LA_LATC2;
 314    case GL_ETC1_RGB8_OES:
 315       return MESA_FORMAT_ETC1_RGB8;
 316    case GL_COMPRESSED_RGB8_ETC2:
 317       return MESA_FORMAT_ETC2_RGB8;
 318    case GL_COMPRESSED_SRGB8_ETC2:
 319       return MESA_FORMAT_ETC2_SRGB8;
 320    case GL_COMPRESSED_RGBA8_ETC2_EAC:
 321       return MESA_FORMAT_ETC2_RGBA8_EAC;
 322    case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
 323       return MESA_FORMAT_ETC2_SRGB8_ALPHA8_EAC;
 324    case GL_COMPRESSED_R11_EAC:
 325       return MESA_FORMAT_ETC2_R11_EAC;
 326    case GL_COMPRESSED_RG11_EAC:
 327       return MESA_FORMAT_ETC2_RG11_EAC;
 328    case GL_COMPRESSED_SIGNED_R11_EAC:
 329       return MESA_FORMAT_ETC2_SIGNED_R11_EAC;
 330    case GL_COMPRESSED_SIGNED_RG11_EAC:
 331       return MESA_FORMAT_ETC2_SIGNED_RG11_EAC;
 332    case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
 333       return MESA_FORMAT_ETC2_RGB8_PUNCHTHROUGH_ALPHA1;
 334    case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
 335       return MESA_FORMAT_ETC2_SRGB8_PUNCHTHROUGH_ALPHA1;
 336    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
 337       return MESA_FORMAT_SRGB_DXT1;
 338    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
 339       return MESA_FORMAT_SRGBA_DXT1;
 340    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
 341       return MESA_FORMAT_SRGBA_DXT3;
 342    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
 343       return MESA_FORMAT_SRGBA_DXT5;
 344
 345    case GL_ALPHA16F_ARB:
 346       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT16);
 347       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT32);
 348       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 349       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 350       break;
 351    case GL_ALPHA32F_ARB:
 352       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT32);
 353       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 354       RETURN_IF_SUPPORTED(MESA_FORMAT_A_FLOAT16);
 355       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 356       break;
 357    case GL_LUMINANCE16F_ARB:
 358       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT16);
 359       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT32);
 360       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 361       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 362       break;
 363    case GL_LUMINANCE32F_ARB:
 364       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT32);
 365       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 366       RETURN_IF_SUPPORTED(MESA_FORMAT_L_FLOAT16);
 367       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 368       break;
 369    case GL_LUMINANCE_ALPHA16F_ARB:
 370       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT16);
 371       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT32);
 372       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 373       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 374       break;
 375    case GL_LUMINANCE_ALPHA32F_ARB:
 376       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT32);
 377       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 378       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_FLOAT16);
 379       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 380       break;
 381    case GL_INTENSITY16F_ARB:
 382       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT16);
 383       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT32);
 384       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 385       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 386       break;
 387    case GL_INTENSITY32F_ARB:
 388       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT32);
 389       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 390       RETURN_IF_SUPPORTED(MESA_FORMAT_I_FLOAT16);
 391       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 392       break;
 393    case GL_RGB16F_ARB:
 394       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 395       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_FLOAT16);
 396       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 397       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 398       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 399       break;
 400    case GL_RGB32F_ARB:
 401       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT32);
 402       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_FLOAT32);
 403       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 404       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_FLOAT16);
 405       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 406       break;
 407    case GL_RGBA16F_ARB:
 408       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 409       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 410       break;
 411    case GL_RGBA32F_ARB:
 412       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 413       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 414       break;
 415
 416    case GL_RGB9_E5:
 417       /* GL_EXT_texture_shared_exponent -- just one format to support */
 418       ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_R9G9B9E5_FLOAT]);
 419       return MESA_FORMAT_R9G9B9E5_FLOAT;
 420
 421    case GL_R11F_G11F_B10F:
 422       /* GL_EXT_texture_packed_float -- just one format to support */
 423       ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_R11G11B10_FLOAT]);
 424       return MESA_FORMAT_R11G11B10_FLOAT;
 425
 426    case GL_DEPTH_STENCIL_EXT:
 427    case GL_DEPTH24_STENCIL8_EXT:
 428       RETURN_IF_SUPPORTED(MESA_FORMAT_S8_UINT_Z24_UNORM);
 429       RETURN_IF_SUPPORTED(MESA_FORMAT_Z24_UNORM_X8_UINT);
 430       break;
 431
 432    case GL_DEPTH_COMPONENT32F:
 433       ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z_FLOAT32]);
 434       return MESA_FORMAT_Z_FLOAT32;
 435    case GL_DEPTH32F_STENCIL8:
 436       ASSERT(ctx->TextureFormatSupported[MESA_FORMAT_Z32_FLOAT_S8X24_UINT]);
 437       return MESA_FORMAT_Z32_FLOAT_S8X24_UINT;
 438
 439    case GL_DUDV_ATI:
 440    case GL_DU8DV8_ATI:
 441       RETURN_IF_SUPPORTED(MESA_FORMAT_DUDV8);
 442       break;
 443
 444    case GL_RED_SNORM:
 445    case GL_R8_SNORM:
 446       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SNORM8);
 447       break;
 448    case GL_RG_SNORM:
 449    case GL_RG8_SNORM:
 450       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8_SNORM);
 451       break;
 452    case GL_RGB_SNORM:
 453    case GL_RGB8_SNORM:
 454       RETURN_IF_SUPPORTED(MESA_FORMAT_X8B8G8R8_SNORM);
 455       /* FALLTHROUGH */
 456    case GL_RGBA_SNORM:
 457    case GL_RGBA8_SNORM:
 458       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 459       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 460       break;
 461    case GL_ALPHA_SNORM:
 462    case GL_ALPHA8_SNORM:
 463       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SNORM8);
 464       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 465       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 466       break;
 467    case GL_LUMINANCE_SNORM:
 468    case GL_LUMINANCE8_SNORM:
 469       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SNORM8);
 470       RETURN_IF_SUPPORTED(MESA_FORMAT_X8B8G8R8_SNORM);
 471       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 472       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 473       break;
 474    case GL_LUMINANCE_ALPHA_SNORM:
 475    case GL_LUMINANCE8_ALPHA8_SNORM:
 476       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_SNORM);
 477       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 478       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 479       break;
 480    case GL_INTENSITY_SNORM:
 481    case GL_INTENSITY8_SNORM:
 482       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SNORM8);
 483       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 484       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 485       break;
 486    case GL_R16_SNORM:
 487       RETURN_IF_SUPPORTED(MESA_FORMAT_R_SNORM16);
 488       break;
 489    case GL_RG16_SNORM:
 490       RETURN_IF_SUPPORTED(MESA_FORMAT_R16G16_SNORM);
 491       break;
 492    case GL_RGB16_SNORM:
 493       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_SNORM16);
 494       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SNORM16);
 495       /* FALLTHROUGH */
 496    case GL_RGBA16_SNORM:
 497       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 498       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 499       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 500       break;
 501    case GL_ALPHA16_SNORM:
 502       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SNORM16);
 503       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 504       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 505       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 506       break;
 507    case GL_LUMINANCE16_SNORM:
 508       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SNORM16);
 509       /* FALLTHROUGH */
 510    case GL_LUMINANCE16_ALPHA16_SNORM:
 511       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SNORM16);
 512       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 513       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 514       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 515       break;
 516    case GL_INTENSITY16_SNORM:
 517       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SNORM16);
 518       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_SNORM16);
 519       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SNORM);
 520       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8B8A8_SNORM);
 521       break;
 522
 523    case GL_SRGB_EXT:
 524    case GL_SRGB8_EXT:
 525       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
 526       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 527       break;
 528    case GL_SRGB_ALPHA_EXT:
 529    case GL_SRGB8_ALPHA8_EXT:
 530       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
 531       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 532       break;
 533    case GL_SLUMINANCE_EXT:
 534    case GL_SLUMINANCE8_EXT:
 535       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SRGB8);
 536       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 537       break;
 538    case GL_SLUMINANCE_ALPHA_EXT:
 539    case GL_SLUMINANCE8_ALPHA8_EXT:
 540       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_SRGB);
 541       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 542       break;
 543    case GL_COMPRESSED_SLUMINANCE_EXT:
 544       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SRGB8);
 545       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 546       break;
 547    case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 548       RETURN_IF_SUPPORTED(MESA_FORMAT_L8A8_SRGB);
 549       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 550       break;
 551    case GL_COMPRESSED_SRGB_EXT:
 552       if (ctx->Mesa_DXTn)
 553          RETURN_IF_SUPPORTED(MESA_FORMAT_SRGB_DXT1);
 554       RETURN_IF_SUPPORTED(MESA_FORMAT_BGR_SRGB8);
 555       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 556       break;
 557    case GL_COMPRESSED_SRGB_ALPHA_EXT:
 558       if (ctx->Mesa_DXTn)
 559          RETURN_IF_SUPPORTED(MESA_FORMAT_SRGBA_DXT3); /* Not srgba_dxt1, see spec */
 560       RETURN_IF_SUPPORTED(MESA_FORMAT_A8B8G8R8_SRGB);
 561       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_SRGB);
 562       break;
 563
 564    case GL_ALPHA8UI_EXT:
 565       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT8);
 566       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 567       break;
 568    case GL_ALPHA16UI_EXT:
 569       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT16);
 570       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 571       break;
 572    case GL_ALPHA32UI_EXT:
 573       RETURN_IF_SUPPORTED(MESA_FORMAT_A_UINT32);
 574       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 575       break;
 576    case GL_ALPHA8I_EXT:
 577       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT8);
 578       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 579       break;
 580    case GL_ALPHA16I_EXT:
 581       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT16);
 582       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 583       break;
 584    case GL_ALPHA32I_EXT:
 585       RETURN_IF_SUPPORTED(MESA_FORMAT_A_SINT32);
 586       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 587       break;
 588    case GL_LUMINANCE8UI_EXT:
 589       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT8);
 590       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 591       break;
 592    case GL_LUMINANCE16UI_EXT:
 593       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT16);
 594       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 595       break;
 596    case GL_LUMINANCE32UI_EXT:
 597       RETURN_IF_SUPPORTED(MESA_FORMAT_L_UINT32);
 598       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 599       break;
 600    case GL_LUMINANCE8I_EXT:
 601       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT8);
 602       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 603       break;
 604    case GL_LUMINANCE16I_EXT:
 605       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT16);
 606       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 607       break;
 608    case GL_LUMINANCE32I_EXT:
 609       RETURN_IF_SUPPORTED(MESA_FORMAT_L_SINT32);
 610       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 611       break;
 612    case GL_LUMINANCE_ALPHA8UI_EXT:
 613       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT8);
 614       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 615       break;
 616    case GL_LUMINANCE_ALPHA16UI_EXT:
 617       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT16);
 618       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 619       break;
 620    case GL_LUMINANCE_ALPHA32UI_EXT:
 621       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_UINT32);
 622       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 623       break;
 624    case GL_LUMINANCE_ALPHA8I_EXT:
 625       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT8);
 626       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 627       break;
 628    case GL_LUMINANCE_ALPHA16I_EXT:
 629       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT16);
 630       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 631       break;
 632    case GL_LUMINANCE_ALPHA32I_EXT:
 633       RETURN_IF_SUPPORTED(MESA_FORMAT_LA_SINT32);
 634       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 635       break;
 636    case GL_INTENSITY8UI_EXT:
 637       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT8);
 638       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 639       break;
 640    case GL_INTENSITY16UI_EXT:
 641       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT16);
 642       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 643       break;
 644    case GL_INTENSITY32UI_EXT:
 645       RETURN_IF_SUPPORTED(MESA_FORMAT_I_UINT32);
 646       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 647       break;
 648    case GL_INTENSITY8I_EXT:
 649       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT8);
 650       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 651       break;
 652    case GL_INTENSITY16I_EXT:
 653       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT16);
 654       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 655       break;
 656    case GL_INTENSITY32I_EXT:
 657       RETURN_IF_SUPPORTED(MESA_FORMAT_I_SINT32);
 658       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 659       break;
 660
 661    case GL_RGB8UI_EXT:
 662       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT8);
 663       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT8);
 664       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 665       break;
 666    case GL_RGB16UI_EXT:
 667       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT16);
 668       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT16);
 669       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 670       break;
 671    case GL_RGB32UI_EXT:
 672       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_UINT32);
 673       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_UINT32);
 674       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 675       break;
 676    case GL_RGB8I_EXT:
 677       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT8);
 678       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT8);
 679       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 680       break;
 681    case GL_RGB16I_EXT:
 682       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT16);
 683       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT16);
 684       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 685       break;
 686    case GL_RGB32I_EXT:
 687       RETURN_IF_SUPPORTED(MESA_FORMAT_RGB_INT32);
 688       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBX_SINT32);
 689       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 690       break;
 691    case GL_RGBA8UI_EXT:
 692       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT8);
 693       break;
 694    case GL_RGBA16UI_EXT:
 695       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT16);
 696       break;
 697    case GL_RGBA32UI_EXT:
 698       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_UINT32);
 699       break;
 700    case GL_RGBA8I_EXT:
 701       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT8);
 702       break;
 703    case GL_RGBA16I_EXT:
 704       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT16);
 705       break;
 706    case GL_RGBA32I_EXT:
 707       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_INT32);
 708       break;
 709
 710    case GL_R8:
 711    case GL_RED:
 712       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM8);
 713       break;
 714
 715    case GL_COMPRESSED_RED:
 716       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 717          RETURN_IF_SUPPORTED(MESA_FORMAT_RED_RGTC1);
 718       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM8);
 719       break;
 720
 721    case GL_R16:
 722       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UNORM16);
 723       break;
 724
 725    case GL_RG:
 726    case GL_RG8:
 727       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8_UNORM);
 728       break;
 729
 730    case GL_COMPRESSED_RG:
 731       if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY)
 732          RETURN_IF_SUPPORTED(MESA_FORMAT_RG_RGTC2);
 733       RETURN_IF_SUPPORTED(MESA_FORMAT_R8G8_UNORM);
 734       break;
 735
 736    case GL_RG16:
 737       RETURN_IF_SUPPORTED(MESA_FORMAT_R16G16_UNORM);
 738       break;
 739
 740    case GL_R16F:
 741       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 742       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 743       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 744       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 745       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 746       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 747       break;
 748    case GL_R32F:
 749       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT32);
 750       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 751       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 752       RETURN_IF_SUPPORTED(MESA_FORMAT_R_FLOAT16);
 753       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 754       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 755       break;
 756    case GL_RG16F:
 757       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 758       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 759       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 760       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 761       break;
 762    case GL_RG32F:
 763       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT32);
 764       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT32);
 765       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_FLOAT16);
 766       RETURN_IF_SUPPORTED(MESA_FORMAT_RGBA_FLOAT16);
 767       break;
 768
 769    case GL_R8UI:
 770       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT8);
 771       break;
 772    case GL_RG8UI:
 773       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT8);
 774       break;
 775    case GL_R16UI:
 776       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT16);
 777       break;
 778    case GL_RG16UI:
 779       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT16);
 780       break;
 781    case GL_R32UI:
 782       RETURN_IF_SUPPORTED(MESA_FORMAT_R_UINT32);
 783       break;
 784    case GL_RG32UI:
 785       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_UINT32);
 786       break;
 787    case GL_R8I:
 788       RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT8);
 789       break;
 790    case GL_RG8I:
 791       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT8);
 792       break;
 793    case GL_R16I:
 794       RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT16);
 795       break;
 796    case GL_RG16I:
 797       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT16);
 798       break;
 799    case GL_R32I:
 800       RETURN_IF_SUPPORTED(MESA_FORMAT_R_INT32);
 801       break;
 802    case GL_RG32I:
 803       RETURN_IF_SUPPORTED(MESA_FORMAT_RG_INT32);
 804       break;
 805
 806    case GL_RGB10_A2UI:
 807       RETURN_IF_SUPPORTED(MESA_FORMAT_B10G10R10A2_UINT);
 808       RETURN_IF_SUPPORTED(MESA_FORMAT_R10G10B10A2_UINT);
 809       break;
 810
 811    case GL_BGRA:
 812       RETURN_IF_SUPPORTED(MESA_FORMAT_B8G8R8A8_UNORM);
 813       break;
 814    }
 815
 816    _mesa_problem(ctx, "unexpected format %s in _mesa_choose_tex_format()",
 817                  _mesa_lookup_enum_by_nr(internalFormat));
 818    return MESA_FORMAT_NONE;
 819 }
 820
 821 GLboolean
 822 _mesa_tex_target_is_array(GLenum target)
 823 {
 824    switch (target) {
 825    case GL_TEXTURE_1D_ARRAY_EXT:
 826    case GL_TEXTURE_2D_ARRAY_EXT:
 827    case GL_TEXTURE_2D_MULTISAMPLE_ARRAY:
 828    case GL_TEXTURE_CUBE_MAP_ARRAY:
 829       return GL_TRUE;
 830    default:
 831       return GL_FALSE;
 832    }
 833 }