src/mesa/state_tracker/st_format.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * Copyright (c) 2008-2010 VMware, Inc.
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  20  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  22  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  23  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  24  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  25  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  **************************************************************************/
  28
  29
  30 /**
  31  * Mesa / Gallium format conversion and format selection code.
  32  * \author Brian Paul
  33  */
  34
  35 #include "main/imports.h"
  36 #include "main/context.h"
  37 #include "main/texstore.h"
  38 #include "main/image.h"
  39 #include "main/macros.h"
  40 #include "main/mfeatures.h"
  41
  42 #include "pipe/p_context.h"
  43 #include "pipe/p_defines.h"
  44 #include "pipe/p_screen.h"
  45 #include "util/u_format.h"
  46 #include "st_context.h"
  47 #include "st_format.h"
  48
  49
  50 static GLuint
  51 format_max_bits(enum pipe_format format)
  52 {
  53    GLuint size = util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 0);
  54
  55    size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 1));
  56    size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 2));
  57    size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_RGB, 3));
  58    size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 0));
  59    size = MAX2(size, util_format_get_component_bits(format, UTIL_FORMAT_COLORSPACE_ZS, 1));
  60    return size;
  61 }
  62
  63
  64 /**
  65  * Return basic GL datatype for the given gallium format.
  66  */
  67 GLenum
  68 st_format_datatype(enum pipe_format format)
  69 {
  70    const struct util_format_description *desc;
  71    int i;
  72
  73    desc = util_format_description(format);
  74    assert(desc);
  75
  76    /* Find the first non-VOID channel. */
  77    for (i = 0; i < 4; i++) {
  78        if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
  79            break;
  80        }
  81    }
  82
  83    if (desc->layout == UTIL_FORMAT_LAYOUT_PLAIN) {
  84       if (format == PIPE_FORMAT_B5G5R5A1_UNORM ||
  85           format == PIPE_FORMAT_B5G6R5_UNORM) {
  86          return GL_UNSIGNED_SHORT;
  87       }
  88       else if (format == PIPE_FORMAT_R11G11B10_FLOAT ||
  89                format == PIPE_FORMAT_R9G9B9E5_FLOAT) {
  90          return GL_FLOAT;
  91       }
  92       else if (format == PIPE_FORMAT_Z24_UNORM_S8_USCALED ||
  93                format == PIPE_FORMAT_S8_USCALED_Z24_UNORM ||
  94                format == PIPE_FORMAT_Z24X8_UNORM ||
  95                format == PIPE_FORMAT_X8Z24_UNORM) {
  96          return GL_UNSIGNED_INT_24_8;
  97       }
  98       else {
  99          const GLuint size = format_max_bits(format);
 100
 101          assert(i < 4);
 102          if (i == 4)
 103             return GL_NONE;
 104
 105          if (size == 8) {
 106             if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED)
 107                return GL_UNSIGNED_BYTE;
 108             else
 109                return GL_BYTE;
 110          }
 111          else if (size == 16) {
 112             if (desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT)
 113                return GL_HALF_FLOAT;
 114             if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED)
 115                return GL_UNSIGNED_SHORT;
 116             else
 117                return GL_SHORT;
 118          }
 119          else if (size <= 32) {
 120             if (desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT)
 121                return GL_FLOAT;
 122             if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED)
 123                return GL_UNSIGNED_INT;
 124             else
 125                return GL_INT;
 126          }
 127          else {
 128             assert(size == 64);
 129             assert(desc->channel[i].type == UTIL_FORMAT_TYPE_FLOAT);
 130             return GL_DOUBLE;
 131          }
 132       }
 133    }
 134    else if (format == PIPE_FORMAT_UYVY) {
 135       return GL_UNSIGNED_SHORT;
 136    }
 137    else if (format == PIPE_FORMAT_YUYV) {
 138       return GL_UNSIGNED_SHORT;
 139    }
 140    else {
 141       /* probably a compressed format, unsupported anyway */
 142       return GL_NONE;
 143    }
 144 }
 145
 146
 147 /**
 148  * Translate Mesa format to Gallium format.
 149  */
 150 enum pipe_format
 151 st_mesa_format_to_pipe_format(gl_format mesaFormat)
 152 {
 153    switch (mesaFormat) {
 154    case MESA_FORMAT_RGBA8888:
 155       return PIPE_FORMAT_A8B8G8R8_UNORM;
 156    case MESA_FORMAT_RGBA8888_REV:
 157       return PIPE_FORMAT_R8G8B8A8_UNORM;
 158    case MESA_FORMAT_ARGB8888:
 159       return PIPE_FORMAT_B8G8R8A8_UNORM;
 160    case MESA_FORMAT_ARGB8888_REV:
 161       return PIPE_FORMAT_A8R8G8B8_UNORM;
 162    case MESA_FORMAT_XRGB8888:
 163       return PIPE_FORMAT_B8G8R8X8_UNORM;
 164    case MESA_FORMAT_XRGB8888_REV:
 165       return PIPE_FORMAT_X8R8G8B8_UNORM;
 166    case MESA_FORMAT_ARGB1555:
 167       return PIPE_FORMAT_B5G5R5A1_UNORM;
 168    case MESA_FORMAT_ARGB4444:
 169       return PIPE_FORMAT_B4G4R4A4_UNORM;
 170    case MESA_FORMAT_RGB565:
 171       return PIPE_FORMAT_B5G6R5_UNORM;
 172    case MESA_FORMAT_RGB332:
 173       return PIPE_FORMAT_B2G3R3_UNORM;
 174    case MESA_FORMAT_ARGB2101010:
 175       return PIPE_FORMAT_B10G10R10A2_UNORM;
 176    case MESA_FORMAT_AL44:
 177       return PIPE_FORMAT_L4A4_UNORM;
 178    case MESA_FORMAT_AL88:
 179       return PIPE_FORMAT_L8A8_UNORM;
 180    case MESA_FORMAT_AL1616:
 181       return PIPE_FORMAT_L16A16_UNORM;
 182    case MESA_FORMAT_A8:
 183       return PIPE_FORMAT_A8_UNORM;
 184    case MESA_FORMAT_A16:
 185       return PIPE_FORMAT_A16_UNORM;
 186    case MESA_FORMAT_L8:
 187       return PIPE_FORMAT_L8_UNORM;
 188    case MESA_FORMAT_L16:
 189       return PIPE_FORMAT_L16_UNORM;
 190    case MESA_FORMAT_I8:
 191       return PIPE_FORMAT_I8_UNORM;
 192    case MESA_FORMAT_I16:
 193       return PIPE_FORMAT_I16_UNORM;
 194    case MESA_FORMAT_Z16:
 195       return PIPE_FORMAT_Z16_UNORM;
 196    case MESA_FORMAT_Z32:
 197       return PIPE_FORMAT_Z32_UNORM;
 198    case MESA_FORMAT_Z24_S8:
 199       return PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 200    case MESA_FORMAT_S8_Z24:
 201       return PIPE_FORMAT_Z24_UNORM_S8_USCALED;
 202    case MESA_FORMAT_Z24_X8:
 203       return PIPE_FORMAT_X8Z24_UNORM;
 204    case MESA_FORMAT_X8_Z24:
 205       return PIPE_FORMAT_Z24X8_UNORM;
 206    case MESA_FORMAT_S8:
 207       return PIPE_FORMAT_S8_USCALED;
 208    case MESA_FORMAT_YCBCR:
 209       return PIPE_FORMAT_UYVY;
 210 #if FEATURE_texture_s3tc
 211    case MESA_FORMAT_RGB_DXT1:
 212       return PIPE_FORMAT_DXT1_RGB;
 213    case MESA_FORMAT_RGBA_DXT1:
 214       return PIPE_FORMAT_DXT1_RGBA;
 215    case MESA_FORMAT_RGBA_DXT3:
 216       return PIPE_FORMAT_DXT3_RGBA;
 217    case MESA_FORMAT_RGBA_DXT5:
 218       return PIPE_FORMAT_DXT5_RGBA;
 219 #if FEATURE_EXT_texture_sRGB
 220    case MESA_FORMAT_SRGB_DXT1:
 221       return PIPE_FORMAT_DXT1_SRGB;
 222    case MESA_FORMAT_SRGBA_DXT1:
 223       return PIPE_FORMAT_DXT1_SRGBA;
 224    case MESA_FORMAT_SRGBA_DXT3:
 225       return PIPE_FORMAT_DXT3_SRGBA;
 226    case MESA_FORMAT_SRGBA_DXT5:
 227       return PIPE_FORMAT_DXT5_SRGBA;
 228 #endif
 229 #endif
 230 #if FEATURE_EXT_texture_sRGB
 231    case MESA_FORMAT_SLA8:
 232       return PIPE_FORMAT_L8A8_SRGB;
 233    case MESA_FORMAT_SL8:
 234       return PIPE_FORMAT_L8_SRGB;
 235    case MESA_FORMAT_SRGB8:
 236       return PIPE_FORMAT_R8G8B8_SRGB;
 237    case MESA_FORMAT_SRGBA8:
 238       return PIPE_FORMAT_A8B8G8R8_SRGB;
 239    case MESA_FORMAT_SARGB8:
 240       return PIPE_FORMAT_B8G8R8A8_SRGB;
 241 #endif
 242    case MESA_FORMAT_RGBA_FLOAT32:
 243       return PIPE_FORMAT_R32G32B32A32_FLOAT;
 244    case MESA_FORMAT_RGBA_FLOAT16:
 245       return PIPE_FORMAT_R16G16B16A16_FLOAT;
 246    case MESA_FORMAT_RGB_FLOAT32:
 247       return PIPE_FORMAT_R32G32B32_FLOAT;
 248    case MESA_FORMAT_RGB_FLOAT16:
 249       return PIPE_FORMAT_R16G16B16_FLOAT;
 250    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
 251       return PIPE_FORMAT_L32A32_FLOAT;
 252    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
 253       return PIPE_FORMAT_L16A16_FLOAT;
 254    case MESA_FORMAT_LUMINANCE_FLOAT32:
 255       return PIPE_FORMAT_L32_FLOAT;
 256    case MESA_FORMAT_LUMINANCE_FLOAT16:
 257       return PIPE_FORMAT_L16_FLOAT;
 258    case MESA_FORMAT_ALPHA_FLOAT32:
 259       return PIPE_FORMAT_A32_FLOAT;
 260    case MESA_FORMAT_ALPHA_FLOAT16:
 261       return PIPE_FORMAT_A16_FLOAT;
 262    case MESA_FORMAT_INTENSITY_FLOAT32:
 263       return PIPE_FORMAT_I32_FLOAT;
 264    case MESA_FORMAT_INTENSITY_FLOAT16:
 265       return PIPE_FORMAT_I16_FLOAT;
 266    case MESA_FORMAT_R_FLOAT32:
 267       return PIPE_FORMAT_R32_FLOAT;
 268    case MESA_FORMAT_R_FLOAT16:
 269       return PIPE_FORMAT_R16_FLOAT;
 270    case MESA_FORMAT_RG_FLOAT32:
 271       return PIPE_FORMAT_R32G32_FLOAT;
 272    case MESA_FORMAT_RG_FLOAT16:
 273       return PIPE_FORMAT_R16G16_FLOAT;
 274
 275    case MESA_FORMAT_R8:
 276       return PIPE_FORMAT_R8_UNORM;
 277    case MESA_FORMAT_R16:
 278       return PIPE_FORMAT_R16_UNORM;
 279    case MESA_FORMAT_RG88:
 280       return PIPE_FORMAT_R8G8_UNORM;
 281    case MESA_FORMAT_RG1616:
 282       return PIPE_FORMAT_R16G16_UNORM;
 283    case MESA_FORMAT_RGBA_16:
 284       return PIPE_FORMAT_R16G16B16A16_UNORM;
 285
 286    /* signed int formats */
 287    case MESA_FORMAT_RGBA_INT8:
 288       return PIPE_FORMAT_R8G8B8A8_SSCALED;
 289    case MESA_FORMAT_RGBA_INT16:
 290       return PIPE_FORMAT_R16G16B16A16_SSCALED;
 291    case MESA_FORMAT_RGBA_INT32:
 292       return PIPE_FORMAT_R32G32B32A32_SSCALED;
 293
 294    /* unsigned int formats */
 295    case MESA_FORMAT_RGBA_UINT8:
 296       return PIPE_FORMAT_R8G8B8A8_USCALED;
 297    case MESA_FORMAT_RGBA_UINT16:
 298       return PIPE_FORMAT_R16G16B16A16_USCALED;
 299    case MESA_FORMAT_RGBA_UINT32:
 300       return PIPE_FORMAT_R32G32B32A32_USCALED;
 301
 302    case MESA_FORMAT_RED_RGTC1:
 303       return PIPE_FORMAT_RGTC1_UNORM;
 304    case MESA_FORMAT_SIGNED_RED_RGTC1:
 305       return PIPE_FORMAT_RGTC1_SNORM;
 306    case MESA_FORMAT_RG_RGTC2:
 307       return PIPE_FORMAT_RGTC2_UNORM;
 308    case MESA_FORMAT_SIGNED_RG_RGTC2:
 309       return PIPE_FORMAT_RGTC2_SNORM;
 310
 311    case MESA_FORMAT_L_LATC1:
 312       return PIPE_FORMAT_LATC1_UNORM;
 313    case MESA_FORMAT_SIGNED_L_LATC1:
 314       return PIPE_FORMAT_LATC1_SNORM;
 315    case MESA_FORMAT_LA_LATC2:
 316       return PIPE_FORMAT_LATC2_UNORM;
 317    case MESA_FORMAT_SIGNED_LA_LATC2:
 318       return PIPE_FORMAT_LATC2_SNORM;
 319
 320    /* signed normalized formats */
 321    case MESA_FORMAT_SIGNED_R8:
 322       return PIPE_FORMAT_R8_SNORM;
 323    case MESA_FORMAT_SIGNED_RG88_REV:
 324       return PIPE_FORMAT_R8G8_SNORM;
 325    case MESA_FORMAT_SIGNED_RGBA8888_REV:
 326       return PIPE_FORMAT_R8G8B8A8_SNORM;
 327
 328    case MESA_FORMAT_SIGNED_A8:
 329       return PIPE_FORMAT_A8_SNORM;
 330    case MESA_FORMAT_SIGNED_L8:
 331       return PIPE_FORMAT_L8_SNORM;
 332    case MESA_FORMAT_SIGNED_AL88:
 333       return PIPE_FORMAT_L8A8_SNORM;
 334    case MESA_FORMAT_SIGNED_I8:
 335       return PIPE_FORMAT_I8_SNORM;
 336
 337    case MESA_FORMAT_SIGNED_R16:
 338       return PIPE_FORMAT_R16_SNORM;
 339    case MESA_FORMAT_SIGNED_GR1616:
 340       return PIPE_FORMAT_R16G16_SNORM;
 341    case MESA_FORMAT_SIGNED_RGBA_16:
 342       return PIPE_FORMAT_R16G16B16A16_SNORM;
 343
 344    case MESA_FORMAT_SIGNED_A16:
 345       return PIPE_FORMAT_A16_SNORM;
 346    case MESA_FORMAT_SIGNED_L16:
 347       return PIPE_FORMAT_L16_SNORM;
 348    case MESA_FORMAT_SIGNED_AL1616:
 349       return PIPE_FORMAT_L16A16_SNORM;
 350    case MESA_FORMAT_SIGNED_I16:
 351       return PIPE_FORMAT_I16_SNORM;
 352
 353    case MESA_FORMAT_RGB9_E5_FLOAT:
 354       return PIPE_FORMAT_R9G9B9E5_FLOAT;
 355    case MESA_FORMAT_R11_G11_B10_FLOAT:
 356       return PIPE_FORMAT_R11G11B10_FLOAT;
 357
 358    default:
 359       assert(0);
 360       return PIPE_FORMAT_NONE;
 361    }
 362 }
 363
 364
 365 /**
 366  * Translate Gallium format to Mesa format.
 367  */
 368 gl_format
 369 st_pipe_format_to_mesa_format(enum pipe_format format)
 370 {
 371    switch (format) {
 372    case PIPE_FORMAT_A8B8G8R8_UNORM:
 373       return MESA_FORMAT_RGBA8888;
 374    case PIPE_FORMAT_R8G8B8A8_UNORM:
 375       return MESA_FORMAT_RGBA8888_REV;
 376    case PIPE_FORMAT_B8G8R8A8_UNORM:
 377       return MESA_FORMAT_ARGB8888;
 378    case PIPE_FORMAT_A8R8G8B8_UNORM:
 379       return MESA_FORMAT_ARGB8888_REV;
 380    case PIPE_FORMAT_B8G8R8X8_UNORM:
 381       return MESA_FORMAT_XRGB8888;
 382    case PIPE_FORMAT_X8R8G8B8_UNORM:
 383       return MESA_FORMAT_XRGB8888_REV;
 384    case PIPE_FORMAT_B5G5R5A1_UNORM:
 385       return MESA_FORMAT_ARGB1555;
 386    case PIPE_FORMAT_B4G4R4A4_UNORM:
 387       return MESA_FORMAT_ARGB4444;
 388    case PIPE_FORMAT_B5G6R5_UNORM:
 389       return MESA_FORMAT_RGB565;
 390    case PIPE_FORMAT_B2G3R3_UNORM:
 391       return MESA_FORMAT_RGB332;
 392    case PIPE_FORMAT_B10G10R10A2_UNORM:
 393       return MESA_FORMAT_ARGB2101010;
 394    case PIPE_FORMAT_L4A4_UNORM:
 395       return MESA_FORMAT_AL44;
 396    case PIPE_FORMAT_L8A8_UNORM:
 397       return MESA_FORMAT_AL88;
 398    case PIPE_FORMAT_L16A16_UNORM:
 399       return MESA_FORMAT_AL1616;
 400    case PIPE_FORMAT_A8_UNORM:
 401       return MESA_FORMAT_A8;
 402    case PIPE_FORMAT_A16_UNORM:
 403       return MESA_FORMAT_A16;
 404    case PIPE_FORMAT_L8_UNORM:
 405       return MESA_FORMAT_L8;
 406    case PIPE_FORMAT_L16_UNORM:
 407       return MESA_FORMAT_L16;
 408    case PIPE_FORMAT_I8_UNORM:
 409       return MESA_FORMAT_I8;
 410    case PIPE_FORMAT_I16_UNORM:
 411       return MESA_FORMAT_I16;
 412    case PIPE_FORMAT_S8_USCALED:
 413       return MESA_FORMAT_S8;
 414
 415    case PIPE_FORMAT_R16G16B16A16_UNORM:
 416       return MESA_FORMAT_RGBA_16;
 417
 418    case PIPE_FORMAT_Z16_UNORM:
 419       return MESA_FORMAT_Z16;
 420    case PIPE_FORMAT_Z32_UNORM:
 421       return MESA_FORMAT_Z32;
 422    case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 423       return MESA_FORMAT_Z24_S8;
 424    case PIPE_FORMAT_X8Z24_UNORM:
 425       return MESA_FORMAT_Z24_X8;
 426    case PIPE_FORMAT_Z24X8_UNORM:
 427       return MESA_FORMAT_X8_Z24;
 428    case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 429       return MESA_FORMAT_S8_Z24;
 430
 431    case PIPE_FORMAT_UYVY:
 432       return MESA_FORMAT_YCBCR;
 433    case PIPE_FORMAT_YUYV:
 434       return MESA_FORMAT_YCBCR_REV;
 435
 436 #if FEATURE_texture_s3tc
 437    case PIPE_FORMAT_DXT1_RGB:
 438       return MESA_FORMAT_RGB_DXT1;
 439    case PIPE_FORMAT_DXT1_RGBA:
 440       return MESA_FORMAT_RGBA_DXT1;
 441    case PIPE_FORMAT_DXT3_RGBA:
 442       return MESA_FORMAT_RGBA_DXT3;
 443    case PIPE_FORMAT_DXT5_RGBA:
 444       return MESA_FORMAT_RGBA_DXT5;
 445 #if FEATURE_EXT_texture_sRGB
 446    case PIPE_FORMAT_DXT1_SRGB:
 447       return MESA_FORMAT_SRGB_DXT1;
 448    case PIPE_FORMAT_DXT1_SRGBA:
 449       return MESA_FORMAT_SRGBA_DXT1;
 450    case PIPE_FORMAT_DXT3_SRGBA:
 451       return MESA_FORMAT_SRGBA_DXT3;
 452    case PIPE_FORMAT_DXT5_SRGBA:
 453       return MESA_FORMAT_SRGBA_DXT5;
 454 #endif
 455 #endif
 456
 457 #if FEATURE_EXT_texture_sRGB
 458    case PIPE_FORMAT_L8A8_SRGB:
 459       return MESA_FORMAT_SLA8;
 460    case PIPE_FORMAT_L8_SRGB:
 461       return MESA_FORMAT_SL8;
 462    case PIPE_FORMAT_R8G8B8_SRGB:
 463       return MESA_FORMAT_SRGB8;
 464    case PIPE_FORMAT_A8B8G8R8_SRGB:
 465       return MESA_FORMAT_SRGBA8;
 466    case PIPE_FORMAT_B8G8R8A8_SRGB:
 467       return MESA_FORMAT_SARGB8;
 468 #endif
 469    case PIPE_FORMAT_R32G32B32A32_FLOAT:
 470       return MESA_FORMAT_RGBA_FLOAT32;
 471    case PIPE_FORMAT_R16G16B16A16_FLOAT:
 472       return MESA_FORMAT_RGBA_FLOAT16;
 473    case PIPE_FORMAT_R32G32B32_FLOAT:
 474       return MESA_FORMAT_RGB_FLOAT32;
 475    case PIPE_FORMAT_R16G16B16_FLOAT:
 476       return MESA_FORMAT_RGB_FLOAT16;
 477    case PIPE_FORMAT_L32A32_FLOAT:
 478       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
 479    case PIPE_FORMAT_L16A16_FLOAT:
 480       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
 481    case PIPE_FORMAT_L32_FLOAT:
 482       return MESA_FORMAT_LUMINANCE_FLOAT32;
 483    case PIPE_FORMAT_L16_FLOAT:
 484       return MESA_FORMAT_LUMINANCE_FLOAT16;
 485    case PIPE_FORMAT_A32_FLOAT:
 486       return MESA_FORMAT_ALPHA_FLOAT32;
 487    case PIPE_FORMAT_A16_FLOAT:
 488       return MESA_FORMAT_ALPHA_FLOAT16;
 489    case PIPE_FORMAT_I32_FLOAT:
 490       return MESA_FORMAT_INTENSITY_FLOAT32;
 491    case PIPE_FORMAT_I16_FLOAT:
 492       return MESA_FORMAT_INTENSITY_FLOAT16;
 493    case PIPE_FORMAT_R32_FLOAT:
 494       return MESA_FORMAT_R_FLOAT32;
 495    case PIPE_FORMAT_R16_FLOAT:
 496       return MESA_FORMAT_R_FLOAT16;
 497    case PIPE_FORMAT_R32G32_FLOAT:
 498       return MESA_FORMAT_RG_FLOAT32;
 499    case PIPE_FORMAT_R16G16_FLOAT:
 500       return MESA_FORMAT_RG_FLOAT16;
 501
 502    case PIPE_FORMAT_R8_UNORM:
 503       return MESA_FORMAT_R8;
 504    case PIPE_FORMAT_R16_UNORM:
 505       return MESA_FORMAT_R16;
 506    case PIPE_FORMAT_R8G8_UNORM:
 507       return MESA_FORMAT_RG88;
 508    case PIPE_FORMAT_R16G16_UNORM:
 509       return MESA_FORMAT_RG1616;
 510
 511    /* signed int formats */
 512    case PIPE_FORMAT_R8G8B8A8_SSCALED:
 513       return MESA_FORMAT_RGBA_INT8;
 514    case PIPE_FORMAT_R16G16B16A16_SSCALED:
 515       return MESA_FORMAT_RGBA_INT16;
 516    case PIPE_FORMAT_R32G32B32A32_SSCALED:
 517       return MESA_FORMAT_RGBA_INT32;
 518
 519    /* unsigned int formats */
 520    case PIPE_FORMAT_R8G8B8A8_USCALED:
 521       return MESA_FORMAT_RGBA_UINT8;
 522    case PIPE_FORMAT_R16G16B16A16_USCALED:
 523       return MESA_FORMAT_RGBA_UINT16;
 524    case PIPE_FORMAT_R32G32B32A32_USCALED:
 525       return MESA_FORMAT_RGBA_UINT32;
 526
 527    case PIPE_FORMAT_RGTC1_UNORM:
 528       return MESA_FORMAT_RED_RGTC1;
 529    case PIPE_FORMAT_RGTC1_SNORM:
 530       return MESA_FORMAT_SIGNED_RED_RGTC1;
 531    case PIPE_FORMAT_RGTC2_UNORM:
 532       return MESA_FORMAT_RG_RGTC2;
 533    case PIPE_FORMAT_RGTC2_SNORM:
 534       return MESA_FORMAT_SIGNED_RG_RGTC2;
 535
 536    case PIPE_FORMAT_LATC1_UNORM:
 537       return MESA_FORMAT_L_LATC1;
 538    case PIPE_FORMAT_LATC1_SNORM:
 539       return MESA_FORMAT_SIGNED_L_LATC1;
 540    case PIPE_FORMAT_LATC2_UNORM:
 541       return MESA_FORMAT_LA_LATC2;
 542    case PIPE_FORMAT_LATC2_SNORM:
 543       return MESA_FORMAT_SIGNED_LA_LATC2;
 544
 545    /* signed normalized formats */
 546    case PIPE_FORMAT_R8_SNORM:
 547       return MESA_FORMAT_SIGNED_R8;
 548    case PIPE_FORMAT_R8G8_SNORM:
 549       return MESA_FORMAT_SIGNED_RG88_REV;
 550    case PIPE_FORMAT_R8G8B8A8_SNORM:
 551       return MESA_FORMAT_SIGNED_RGBA8888_REV;
 552
 553    case PIPE_FORMAT_A8_SNORM:
 554       return MESA_FORMAT_SIGNED_A8;
 555    case PIPE_FORMAT_L8_SNORM:
 556       return MESA_FORMAT_SIGNED_L8;
 557    case PIPE_FORMAT_L8A8_SNORM:
 558       return MESA_FORMAT_SIGNED_AL88;
 559    case PIPE_FORMAT_I8_SNORM:
 560       return MESA_FORMAT_SIGNED_I8;
 561
 562    case PIPE_FORMAT_R16_SNORM:
 563       return MESA_FORMAT_SIGNED_R16;
 564    case PIPE_FORMAT_R16G16_SNORM:
 565       return MESA_FORMAT_SIGNED_GR1616;
 566    case PIPE_FORMAT_R16G16B16A16_SNORM:
 567       return MESA_FORMAT_SIGNED_RGBA_16;
 568
 569    case PIPE_FORMAT_A16_SNORM:
 570       return MESA_FORMAT_SIGNED_A16;
 571    case PIPE_FORMAT_L16_SNORM:
 572       return MESA_FORMAT_SIGNED_L16;
 573    case PIPE_FORMAT_L16A16_SNORM:
 574       return MESA_FORMAT_SIGNED_AL1616;
 575    case PIPE_FORMAT_I16_SNORM:
 576       return MESA_FORMAT_SIGNED_I16;
 577
 578    case PIPE_FORMAT_R9G9B9E5_FLOAT:
 579       return MESA_FORMAT_RGB9_E5_FLOAT;
 580    case PIPE_FORMAT_R11G11B10_FLOAT:
 581       return MESA_FORMAT_R11_G11_B10_FLOAT;
 582
 583    default:
 584       assert(0);
 585       return MESA_FORMAT_NONE;
 586    }
 587 }
 588
 589
 590 /**
 591  * Map GL texture formats to Gallium pipe formats.
 592  */
 593 struct format_mapping
 594 {
 595    GLenum glFormats[18];       /**< list of GLenum formats, 0-terminated */
 596    enum pipe_format pipeFormats[10]; /**< list of pipe formats, 0-terminated */
 597 };
 598
 599
 600 #define DEFAULT_RGBA_FORMATS \
 601       PIPE_FORMAT_B8G8R8A8_UNORM, \
 602       PIPE_FORMAT_A8R8G8B8_UNORM, \
 603       PIPE_FORMAT_A8B8G8R8_UNORM, \
 604       PIPE_FORMAT_B5G6R5_UNORM, \
 605       0
 606
 607 #define DEFAULT_RGB_FORMATS \
 608       PIPE_FORMAT_B8G8R8X8_UNORM, \
 609       PIPE_FORMAT_X8R8G8B8_UNORM, \
 610       PIPE_FORMAT_X8B8G8R8_UNORM, \
 611       PIPE_FORMAT_B8G8R8A8_UNORM, \
 612       PIPE_FORMAT_A8R8G8B8_UNORM, \
 613       PIPE_FORMAT_A8B8G8R8_UNORM, \
 614       PIPE_FORMAT_B5G6R5_UNORM, \
 615       0
 616
 617 #define DEFAULT_SRGBA_FORMATS \
 618       PIPE_FORMAT_B8G8R8A8_SRGB, \
 619       PIPE_FORMAT_A8R8G8B8_SRGB, \
 620       PIPE_FORMAT_A8B8G8R8_SRGB, \
 621       0
 622
 623 #define DEFAULT_DEPTH_FORMATS \
 624       PIPE_FORMAT_Z24X8_UNORM, \
 625       PIPE_FORMAT_X8Z24_UNORM, \
 626       PIPE_FORMAT_Z16_UNORM, \
 627       PIPE_FORMAT_Z24_UNORM_S8_USCALED, \
 628       PIPE_FORMAT_S8_USCALED_Z24_UNORM, \
 629       0
 630
 631 /**
 632  * This table maps OpenGL texture format enums to Gallium pipe_format enums.
 633  * Multiple GL enums might map to multiple pipe_formats.
 634  * The first pipe format in the list that's supported is the one that's chosen.
 635  */
 636 static const struct format_mapping format_map[] = {
 637    /* Basic RGB, RGBA formats */
 638    {
 639       { GL_RGB10, GL_RGB10_A2, 0 },
 640       { PIPE_FORMAT_B10G10R10A2_UNORM, DEFAULT_RGBA_FORMATS }
 641    },
 642    {
 643       { 4, GL_RGBA, GL_RGBA8, 0 },
 644       { PIPE_FORMAT_R8G8B8A8_UNORM, DEFAULT_RGBA_FORMATS }
 645    },
 646    {
 647       { GL_BGRA, 0 },
 648       { PIPE_FORMAT_B8G8R8A8_UNORM, DEFAULT_RGBA_FORMATS }
 649    },
 650    {
 651       { 3, GL_RGB, GL_RGB8, 0 },
 652       { DEFAULT_RGB_FORMATS }
 653    },
 654    {
 655       { GL_RGB12, GL_RGB16, GL_RGBA12, GL_RGBA16, 0 },
 656       { PIPE_FORMAT_R16G16B16A16_UNORM, DEFAULT_RGBA_FORMATS }
 657    },
 658    {
 659       { GL_RGBA4, GL_RGBA2, 0 },
 660       { PIPE_FORMAT_B4G4R4A4_UNORM, DEFAULT_RGBA_FORMATS }
 661    },
 662    {
 663       { GL_RGB5_A1, 0 },
 664       { PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
 665    },
 666    {
 667       { GL_R3_G3_B2, 0 },
 668       { PIPE_FORMAT_B2G3R3_UNORM, PIPE_FORMAT_B5G6R5_UNORM,
 669         PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
 670    },
 671    {
 672       { GL_RGB5, GL_RGB4 },
 673       { PIPE_FORMAT_B5G6R5_UNORM, PIPE_FORMAT_B5G5R5A1_UNORM,
 674         DEFAULT_RGBA_FORMATS }
 675    },
 676
 677    /* basic Alpha formats */
 678    {
 679       { GL_ALPHA12, GL_ALPHA16, 0 },
 680       { PIPE_FORMAT_A16_UNORM, PIPE_FORMAT_A8_UNORM,
 681         DEFAULT_RGBA_FORMATS }
 682    },
 683    {
 684       { GL_ALPHA, GL_ALPHA4, GL_ALPHA8, GL_COMPRESSED_ALPHA, 0 },
 685       { PIPE_FORMAT_A8_UNORM, DEFAULT_RGBA_FORMATS }
 686    },
 687
 688    /* basic Luminance formats */
 689    {
 690       { GL_LUMINANCE12, GL_LUMINANCE16, 0 },
 691       { PIPE_FORMAT_L16_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
 692    },
 693    {
 694       { 1, GL_LUMINANCE, GL_LUMINANCE4, GL_LUMINANCE8, 0 },
 695       { PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
 696    },
 697
 698    /* basic Luminance/Alpha formats */
 699    {
 700       { GL_LUMINANCE12_ALPHA4, GL_LUMINANCE12_ALPHA12,
 701         GL_LUMINANCE16_ALPHA16, 0},
 702       { PIPE_FORMAT_L16A16_UNORM, PIPE_FORMAT_L8A8_UNORM,
 703         DEFAULT_RGBA_FORMATS }
 704    },
 705    {
 706       { 2, GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, GL_LUMINANCE8_ALPHA8, 0 },
 707       { PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
 708    },
 709    {
 710       { GL_LUMINANCE4_ALPHA4, 0 },
 711       { PIPE_FORMAT_L4A4_UNORM, PIPE_FORMAT_L8A8_UNORM,
 712         DEFAULT_RGBA_FORMATS }
 713    },
 714
 715    /* basic Intensity formats */
 716    {
 717       { GL_INTENSITY12, GL_INTENSITY16, 0 },
 718       { PIPE_FORMAT_I16_UNORM, PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
 719    },
 720    {
 721       { GL_INTENSITY, GL_INTENSITY4, GL_INTENSITY8,
 722         GL_COMPRESSED_INTENSITY, 0 },
 723       { PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
 724    },
 725
 726    /* YCbCr */
 727    {
 728       { GL_YCBCR_MESA, 0 },
 729       { PIPE_FORMAT_UYVY, PIPE_FORMAT_YUYV, 0 }
 730    },
 731
 732    /* compressed formats */ /* XXX PIPE_BIND_SAMPLER_VIEW only */
 733    {
 734       { GL_COMPRESSED_RGB, 0 },
 735       { PIPE_FORMAT_DXT1_RGB, DEFAULT_RGB_FORMATS }
 736    },
 737    {
 738       { GL_COMPRESSED_RGBA, 0 },
 739       { PIPE_FORMAT_DXT5_RGBA, DEFAULT_RGBA_FORMATS }
 740    },
 741    {
 742       { GL_RGB_S3TC, GL_RGB4_S3TC, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 0 },
 743       { PIPE_FORMAT_DXT1_RGB, 0 }
 744    },
 745    {
 746       { GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 0 },
 747       { PIPE_FORMAT_DXT1_RGBA, 0 }
 748    },
 749    {
 750       { GL_RGBA_S3TC, GL_RGBA4_S3TC, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 0 },
 751       { PIPE_FORMAT_DXT3_RGBA, 0 }
 752    },
 753    {
 754       { GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 0 },
 755       { PIPE_FORMAT_DXT5_RGBA, 0 }
 756    },
 757
 758 #if 0
 759    {
 760       { GL_COMPRESSED_RGB_FXT1_3DFX, 0 },
 761       { PIPE_FORMAT_RGB_FXT1, 0 }
 762    },
 763    {
 764       { GL_COMPRESSED_RGBA_FXT1_3DFX, 0 },
 765       { PIPE_FORMAT_RGBA_FXT1, 0 }
 766    },
 767 #endif
 768
 769    /* Depth formats */
 770    {
 771       { GL_DEPTH_COMPONENT16, 0 },
 772       { PIPE_FORMAT_Z16_UNORM, DEFAULT_DEPTH_FORMATS }
 773    },
 774    {
 775       { GL_DEPTH_COMPONENT24, 0 },
 776       { PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
 777         DEFAULT_DEPTH_FORMATS }
 778    },
 779    {
 780       { GL_DEPTH_COMPONENT32, 0 },
 781       { PIPE_FORMAT_Z32_UNORM, DEFAULT_DEPTH_FORMATS }
 782    },
 783    {
 784       { GL_DEPTH_COMPONENT, 0 },
 785       { DEFAULT_DEPTH_FORMATS }
 786    },
 787
 788    /* stencil formats */
 789    {
 790       { GL_STENCIL_INDEX, GL_STENCIL_INDEX1_EXT, GL_STENCIL_INDEX4_EXT,
 791         GL_STENCIL_INDEX8_EXT, GL_STENCIL_INDEX16_EXT, 0 },
 792       {
 793          PIPE_FORMAT_S8_USCALED, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 794          PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0
 795       }
 796    },
 797
 798    /* Depth / Stencil formats */
 799    {
 800       { GL_DEPTH_STENCIL_EXT, GL_DEPTH24_STENCIL8_EXT, 0 },
 801       { PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0 }
 802    },
 803
 804    /* sRGB formats */
 805    {
 806       { GL_SRGB_EXT, GL_SRGB8_EXT, GL_SRGB_ALPHA_EXT, GL_SRGB8_ALPHA8_EXT, 0 },
 807       { DEFAULT_SRGBA_FORMATS }
 808    },
 809    {
 810       { GL_COMPRESSED_SRGB_EXT, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT, 0 },
 811       { PIPE_FORMAT_DXT1_SRGB, DEFAULT_SRGBA_FORMATS }
 812    },
 813    {
 814       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 0 },
 815       { PIPE_FORMAT_DXT1_SRGBA, 0 }
 816    },
 817    {
 818       { GL_COMPRESSED_SRGB_ALPHA_EXT,
 819         GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 0 },
 820       { PIPE_FORMAT_DXT3_SRGBA, DEFAULT_SRGBA_FORMATS }
 821    },
 822    {
 823       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 0 },
 824       { PIPE_FORMAT_DXT5_SRGBA, 0 }
 825    },
 826    {
 827       { GL_SLUMINANCE_ALPHA_EXT, GL_SLUMINANCE8_ALPHA8_EXT,
 828         GL_COMPRESSED_SLUMINANCE_EXT, GL_COMPRESSED_SLUMINANCE_ALPHA_EXT, 0 },
 829       { PIPE_FORMAT_L8A8_SRGB, DEFAULT_SRGBA_FORMATS }
 830    },
 831    {
 832       { GL_SLUMINANCE_EXT, GL_SLUMINANCE8_EXT, 0 },
 833       { PIPE_FORMAT_L8_SRGB, DEFAULT_SRGBA_FORMATS }
 834    },
 835
 836    /* 16-bit float formats */
 837    {
 838       { GL_RGBA16F_ARB, 0 },
 839       { PIPE_FORMAT_R16G16B16A16_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 840    },
 841    {
 842       { GL_RGB16F_ARB, 0 },
 843       { PIPE_FORMAT_R16G16B16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 844         PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 845    },
 846    {
 847       { GL_LUMINANCE_ALPHA16F_ARB, 0 },
 848       { PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 849         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 850    },
 851    {
 852       { GL_ALPHA16F_ARB, 0 },
 853       { PIPE_FORMAT_A16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 854         PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 855         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 856    },
 857    {
 858       { GL_INTENSITY16F_ARB, 0 },
 859       { PIPE_FORMAT_I16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 860         PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 861         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 862    },
 863    {
 864       { GL_LUMINANCE16F_ARB, 0 },
 865       { PIPE_FORMAT_L16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 866         PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 867         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 868    },
 869    {
 870       { GL_R16F, 0 },
 871       { PIPE_FORMAT_R16_FLOAT, PIPE_FORMAT_R16G16_FLOAT,
 872         PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 873         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 874    },
 875    {
 876       { GL_RG16F, 0 },
 877       { PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 878         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 879    },
 880
 881    /* 32-bit float formats */
 882    {
 883       { GL_RGBA32F_ARB, 0 },
 884       { PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 885    },
 886    {
 887       { GL_RGB32F_ARB, 0 },
 888       { PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
 889         PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 890    },
 891    {
 892       { GL_LUMINANCE_ALPHA32F_ARB, 0 },
 893       { PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
 894         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 895    },
 896    {
 897       { GL_ALPHA32F_ARB, 0 },
 898       { PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
 899         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_A16_FLOAT,
 900         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 901    },
 902    {
 903       { GL_INTENSITY32F_ARB, 0 },
 904       { PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
 905         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_I16_FLOAT,
 906         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 907    },
 908    {
 909       { GL_LUMINANCE32F_ARB, 0 },
 910       { PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
 911         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_L16_FLOAT,
 912         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 913    },
 914    {
 915       { GL_R32F, 0 },
 916       { PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT,
 917         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16_FLOAT,
 918         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 919    },
 920    {
 921       { GL_RG32F, 0 },
 922       { PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
 923         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 924    },
 925
 926    /* R, RG formats */
 927    {
 928       { GL_RED, GL_R8, 0 },
 929       { PIPE_FORMAT_R8_UNORM, 0 }
 930    },
 931    {
 932       { GL_RG, GL_RG8, 0 },
 933       { PIPE_FORMAT_R8G8_UNORM, 0 }
 934    },
 935    {
 936       { GL_R16, 0 },
 937       { PIPE_FORMAT_R16_UNORM, 0 }
 938    },
 939    {
 940       { GL_RG16, 0 },
 941       { PIPE_FORMAT_R16G16_UNORM, 0 }
 942    },
 943
 944    /* compressed R, RG formats */
 945    {
 946       { GL_COMPRESSED_RED, GL_COMPRESSED_RED_RGTC1, 0 },
 947       { PIPE_FORMAT_RGTC1_UNORM, PIPE_FORMAT_R8_UNORM, 0 }
 948    },
 949    {
 950       { GL_COMPRESSED_SIGNED_RED_RGTC1, 0 },
 951       { PIPE_FORMAT_RGTC1_SNORM, 0 }
 952    },
 953    {
 954       { GL_COMPRESSED_RG, GL_COMPRESSED_RG_RGTC2, 0 },
 955       { PIPE_FORMAT_RGTC2_UNORM, PIPE_FORMAT_R8G8_UNORM, 0 }
 956    },
 957    {
 958       { GL_COMPRESSED_SIGNED_RG_RGTC2, 0 },
 959       { PIPE_FORMAT_RGTC2_SNORM, 0 }
 960    },
 961    {
 962       { GL_COMPRESSED_LUMINANCE, GL_COMPRESSED_LUMINANCE_LATC1_EXT, 0 },
 963       { PIPE_FORMAT_LATC1_UNORM, PIPE_FORMAT_L8_UNORM, 0 }
 964    },
 965    {
 966       { GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT, 0 },
 967       { PIPE_FORMAT_LATC1_SNORM, 0 }
 968    },
 969    {
 970       { GL_COMPRESSED_LUMINANCE_ALPHA, GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT,
 971         GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI, 0 },
 972       { PIPE_FORMAT_LATC2_UNORM, PIPE_FORMAT_L8A8_UNORM, 0 }
 973    },
 974    {
 975       { GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT, 0 },
 976       { PIPE_FORMAT_LATC2_SNORM, 0 }
 977    },
 978
 979    /* signed/unsigned integer formats.
 980     * XXX Mesa only has formats for RGBA signed/unsigned integer formats.
 981     * If/when new formats are added this code should be updated.
 982     */
 983    {
 984       { GL_RED_INTEGER_EXT,
 985         GL_GREEN_INTEGER_EXT,
 986         GL_BLUE_INTEGER_EXT,
 987         GL_ALPHA_INTEGER_EXT,
 988         GL_RGB_INTEGER_EXT,
 989         GL_RGBA_INTEGER_EXT,
 990         GL_BGR_INTEGER_EXT,
 991         GL_BGRA_INTEGER_EXT,
 992         GL_LUMINANCE_INTEGER_EXT,
 993         GL_LUMINANCE_ALPHA_INTEGER_EXT,
 994         GL_RGBA8I_EXT,
 995         GL_RGB8I_EXT,
 996         GL_ALPHA8I_EXT,
 997         GL_INTENSITY8I_EXT,
 998         GL_LUMINANCE8I_EXT,
 999         GL_LUMINANCE_ALPHA8I_EXT, 0 },
1000       { PIPE_FORMAT_R8G8B8A8_SSCALED, 0 }
1001    },
1002    {
1003       {
1004          GL_RGBA16I_EXT,
1005          GL_RGB16I_EXT,
1006          GL_ALPHA16I_EXT,
1007          GL_INTENSITY16I_EXT,
1008          GL_LUMINANCE16I_EXT,
1009          GL_LUMINANCE_ALPHA16I_EXT, 0 },
1010       { PIPE_FORMAT_R16G16B16A16_SSCALED, 0 },
1011    },
1012    {
1013       {
1014          GL_RGBA32I_EXT,
1015          GL_RGB32I_EXT,
1016          GL_ALPHA32I_EXT,
1017          GL_INTENSITY32I_EXT,
1018          GL_LUMINANCE32I_EXT,
1019          GL_LUMINANCE_ALPHA32I_EXT, 0 },
1020       { PIPE_FORMAT_R32G32B32A32_SSCALED, 0 }
1021    },
1022    {
1023       {
1024          GL_RGBA8UI_EXT,
1025          GL_RGB8UI_EXT,
1026          GL_ALPHA8UI_EXT,
1027          GL_INTENSITY8UI_EXT,
1028          GL_LUMINANCE8UI_EXT,
1029          GL_LUMINANCE_ALPHA8UI_EXT, 0 },
1030       { PIPE_FORMAT_R8G8B8A8_USCALED, 0 }
1031    },
1032    {
1033       {
1034          GL_RGBA16UI_EXT,
1035          GL_RGB16UI_EXT,
1036          GL_ALPHA16UI_EXT,
1037          GL_INTENSITY16UI_EXT,
1038          GL_LUMINANCE16UI_EXT,
1039          GL_LUMINANCE_ALPHA16UI_EXT, 0 },
1040       { PIPE_FORMAT_R16G16B16A16_USCALED, 0 }
1041    },
1042    {
1043       {
1044          GL_RGBA32UI_EXT,
1045          GL_RGB32UI_EXT,
1046          GL_ALPHA32UI_EXT,
1047          GL_INTENSITY32UI_EXT,
1048          GL_LUMINANCE32UI_EXT,
1049          GL_LUMINANCE_ALPHA32UI_EXT, 0 },
1050       { PIPE_FORMAT_R32G32B32A32_USCALED, 0 }
1051    },
1052
1053    /* signed normalized formats */
1054    {
1055       { GL_RED_SNORM, GL_R8_SNORM, 0 },
1056       { PIPE_FORMAT_R8_SNORM, PIPE_FORMAT_R8G8_SNORM,
1057         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1058    },
1059    {
1060       { GL_R16_SNORM, 0 },
1061       { PIPE_FORMAT_R16_SNORM,
1062         PIPE_FORMAT_R16G16_SNORM,
1063         PIPE_FORMAT_R16G16B16A16_SNORM,
1064         PIPE_FORMAT_R8_SNORM,
1065         PIPE_FORMAT_R8G8_SNORM,
1066         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1067    },
1068    {
1069       { GL_RG_SNORM, GL_RG8_SNORM, 0 },
1070       { PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1071    },
1072    {
1073       { GL_RG16_SNORM, 0 },
1074       { PIPE_FORMAT_R16G16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1075         PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1076    },
1077    {
1078       { GL_RGB_SNORM, GL_RGB8_SNORM, GL_RGBA_SNORM, GL_RGBA8_SNORM, 0 },
1079       { PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1080    },
1081    {
1082       { GL_RGB16_SNORM, GL_RGBA16_SNORM, 0 },
1083       { PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1084    },
1085    {
1086       { GL_ALPHA_SNORM, GL_ALPHA8_SNORM, 0 },
1087       { PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1088    },
1089    {
1090       { GL_ALPHA16_SNORM, 0 },
1091       { PIPE_FORMAT_A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1092         PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1093    },
1094    {
1095       { GL_LUMINANCE_SNORM, GL_LUMINANCE8_SNORM, 0 },
1096       { PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1097    },
1098    {
1099       { GL_LUMINANCE16_SNORM, 0 },
1100       { PIPE_FORMAT_L16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1101         PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1102    },
1103    {
1104       { GL_LUMINANCE_ALPHA_SNORM, GL_LUMINANCE8_ALPHA8_SNORM, 0 },
1105       { PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1106    },
1107    {
1108       { GL_LUMINANCE16_ALPHA16_SNORM, 0 },
1109       { PIPE_FORMAT_L16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1110         PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1111    },
1112    {
1113       { GL_INTENSITY_SNORM, GL_INTENSITY8_SNORM, 0 },
1114       { PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1115    },
1116    {
1117       { GL_INTENSITY16_SNORM, 0 },
1118       { PIPE_FORMAT_I16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1119         PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1120    },
1121    {
1122       { GL_RGB9_E5, 0 },
1123       { PIPE_FORMAT_R9G9B9E5_FLOAT, 0 }
1124    },
1125    {
1126       { GL_R11F_G11F_B10F, 0 },
1127       { PIPE_FORMAT_R11G11B10_FLOAT, 0 }
1128    }
1129 };
1130
1131
1132 /**
1133  * Return first supported format from the given list.
1134  */
1135 static enum pipe_format
1136 find_supported_format(struct pipe_screen *screen,
1137                       const enum pipe_format formats[],
1138                       enum pipe_texture_target target,
1139                       unsigned sample_count,
1140                       unsigned tex_usage)
1141 {
1142    uint i;
1143    for (i = 0; formats[i]; i++) {
1144       if (screen->is_format_supported(screen, formats[i], target,
1145                                       sample_count, tex_usage)) {
1146          return formats[i];
1147       }
1148    }
1149    return PIPE_FORMAT_NONE;
1150 }
1151
1152 struct exact_format_mapping
1153 {
1154    GLenum format;
1155    GLenum type;
1156    enum pipe_format pformat;
1157 };
1158
1159 static const struct exact_format_mapping rgba8888_tbl[] =
1160 {
1161    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8B8G8R8_UNORM },
1162    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_A8B8G8R8_UNORM },
1163    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8A8_UNORM },
1164    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8A8_UNORM },
1165    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8R8G8B8_UNORM },
1166    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8A8_UNORM },
1167    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8A8_UNORM },
1168    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_A8B8G8R8_UNORM },
1169    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8A8_UNORM },
1170    { 0,           0,                              0                          }
1171 };
1172
1173 static const struct exact_format_mapping rgbx8888_tbl[] =
1174 {
1175    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8R8G8B8_UNORM },
1176    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8X8_UNORM },
1177    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8X8_UNORM },
1178    /* No Mesa formats for these Gallium formats:
1179    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8B8G8R8_UNORM },
1180    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_X8B8G8R8_UNORM },
1181    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8X8_UNORM },
1182    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8X8_UNORM },
1183    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8X8_UNORM },
1184    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_X8B8G8R8_UNORM },
1185    */
1186    { 0,           0,                              0                          }
1187 };
1188
1189 static const struct exact_format_mapping rgba1010102_tbl[] =
1190 {
1191    { GL_BGRA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_B10G10R10A2_UNORM },
1192    /* No Mesa formats for these Gallium formats:
1193    { GL_RGBA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_R10G10B10A2_UNORM },
1194    { GL_ABGR_EXT, GL_UNSIGNED_INT_10_10_10_2,     PIPE_FORMAT_R10G10B10A2_UNORM },
1195    { GL_ABGR_EXT, GL_UNSIGNED_INT,                PIPE_FORMAT_R10G10B10A2_UNORM },
1196    */
1197    { 0,           0,                              0                             }
1198 };
1199
1200 /**
1201  * If there is an exact pipe_format match for {internalFormat, format, type}
1202  * return that, otherwise return PIPE_FORMAT_NONE so we can do fuzzy matching.
1203  */
1204 static enum pipe_format
1205 find_exact_format(GLint internalFormat, GLenum format, GLenum type)
1206 {
1207    uint i;
1208    const struct exact_format_mapping* tbl;
1209
1210    if (format == GL_NONE || type == GL_NONE)
1211       return PIPE_FORMAT_NONE;
1212
1213    switch (internalFormat) {
1214    case 4:
1215    case GL_RGBA:
1216    case GL_RGBA8:
1217       tbl = rgba8888_tbl;
1218       break;
1219    case 3:
1220    case GL_RGB:
1221    case GL_RGB8:
1222       tbl = rgbx8888_tbl;
1223       break;
1224    case GL_RGB10_A2:
1225       tbl = rgba1010102_tbl;
1226       break;
1227    default:
1228       return PIPE_FORMAT_NONE;
1229    }
1230
1231    for (i = 0; tbl[i].format; i++)
1232       if (tbl[i].format == format && tbl[i].type == type)
1233          return tbl[i].pformat;
1234
1235    return PIPE_FORMAT_NONE;
1236 }
1237
1238 /**
1239  * Given an OpenGL internalFormat value for a texture or surface, return
1240  * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
1241  * This is called during glTexImage2D, for example.
1242  *
1243  * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
1244  * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
1245  * we want render-to-texture ability.
1246  *
1247  * \param internalFormat  the user value passed to glTexImage2D
1248  * \param target  one of PIPE_TEXTURE_x
1249  * \param bindings  bitmask of PIPE_BIND_x flags.
1250  */
1251 enum pipe_format
1252 st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
1253                  GLenum format, GLenum type,
1254                  enum pipe_texture_target target, unsigned sample_count,
1255                  unsigned bindings)
1256 {
1257    GET_CURRENT_CONTEXT(ctx); /* XXX this should be a function parameter */
1258    int i, j;
1259    enum pipe_format pf;
1260
1261    /* can't render to compressed formats at this time */
1262    if (_mesa_is_compressed_format(ctx, internalFormat)
1263        && (bindings & ~PIPE_BIND_SAMPLER_VIEW)) {
1264       return PIPE_FORMAT_NONE;
1265    }
1266
1267    /* search for exact matches */
1268    pf = find_exact_format(internalFormat, format, type);
1269    if (pf != PIPE_FORMAT_NONE &&
1270        screen->is_format_supported(screen, pf,
1271                                    target, sample_count, bindings))
1272       return pf;
1273
1274    /* search table for internalFormat */
1275    for (i = 0; i < Elements(format_map); i++) {
1276       const struct format_mapping *mapping = &format_map[i];
1277       for (j = 0; mapping->glFormats[j]; j++) {
1278          if (mapping->glFormats[j] == internalFormat) {
1279             /* Found the desired internal format.  Find first pipe format
1280              * which is supported by the driver.
1281              */
1282             return find_supported_format(screen, mapping->pipeFormats,
1283                                          target, sample_count, bindings);
1284          }
1285       }
1286    }
1287
1288    _mesa_problem(NULL, "unhandled format!\n");
1289    return PIPE_FORMAT_NONE;
1290 }
1291
1292
1293 /**
1294  * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
1295  */
1296 enum pipe_format
1297 st_choose_renderbuffer_format(struct pipe_screen *screen,
1298                               GLenum internalFormat, unsigned sample_count)
1299 {
1300    uint usage;
1301    if (_mesa_is_depth_or_stencil_format(internalFormat))
1302       usage = PIPE_BIND_DEPTH_STENCIL;
1303    else
1304       usage = PIPE_BIND_RENDER_TARGET;
1305    return st_choose_format(screen, internalFormat, GL_NONE, GL_NONE, PIPE_TEXTURE_2D,
1306                            sample_count, usage);
1307 }
1308
1309
1310 gl_format
1311 st_ChooseTextureFormat_renderable(struct gl_context *ctx, GLint internalFormat,
1312                                   GLenum format, GLenum type, GLboolean renderable)
1313 {
1314    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
1315    enum pipe_format pFormat;
1316    uint bindings;
1317
1318    (void) format;
1319    (void) type;
1320
1321    /* GL textures may wind up being render targets, but we don't know
1322     * that in advance.  Specify potential render target flags now.
1323     */
1324    bindings = PIPE_BIND_SAMPLER_VIEW;
1325    if (renderable) {
1326       if (_mesa_is_depth_or_stencil_format(internalFormat))
1327          bindings |= PIPE_BIND_DEPTH_STENCIL;
1328       else
1329          bindings |= PIPE_BIND_RENDER_TARGET;
1330    }
1331
1332    pFormat = st_choose_format(screen, internalFormat, format, type,
1333                               PIPE_TEXTURE_2D, 0, bindings);
1334
1335    if (pFormat == PIPE_FORMAT_NONE) {
1336       /* try choosing format again, this time without render target bindings */
1337       pFormat = st_choose_format(screen, internalFormat, format, type,
1338                                  PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
1339    }
1340
1341    if (pFormat == PIPE_FORMAT_NONE) {
1342       /* no luck at all */
1343       return MESA_FORMAT_NONE;
1344    }
1345
1346    return st_pipe_format_to_mesa_format(pFormat);
1347 }
1348
1349
1350 /**
1351  * Called via ctx->Driver.ChooseTextureFormat().
1352  */
1353 gl_format
1354 st_ChooseTextureFormat(struct gl_context *ctx, GLint internalFormat,
1355                        GLenum format, GLenum type)
1356 {
1357    boolean want_renderable =
1358       internalFormat == 3 || internalFormat == 4 ||
1359       internalFormat == GL_RGB || internalFormat == GL_RGBA ||
1360       internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||
1361       internalFormat == GL_BGRA;
1362
1363    return st_ChooseTextureFormat_renderable(ctx, internalFormat,
1364                                             format, type, want_renderable);
1365 }
1366
1367 /**
1368  * Test if a gallium format is equivalent to a GL format/type.
1369  */
1370 GLboolean
1371 st_equal_formats(enum pipe_format pFormat, GLenum format, GLenum type)
1372 {
1373    switch (pFormat) {
1374    case PIPE_FORMAT_A8B8G8R8_UNORM:
1375       return format == GL_RGBA && type == GL_UNSIGNED_BYTE;
1376    case PIPE_FORMAT_A8R8G8B8_UNORM:
1377       return format == GL_BGRA && type == GL_UNSIGNED_BYTE;
1378    case PIPE_FORMAT_B5G6R5_UNORM:
1379       return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5;
1380    /* XXX more combos... */
1381    default:
1382       return GL_FALSE;
1383    }
1384 }
1385
1386 GLboolean
1387 st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
1388 {
1389    if (format1 == format2)
1390       return GL_TRUE;
1391
1392    if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&
1393        format2 == PIPE_FORMAT_B8G8R8X8_UNORM)
1394       return GL_TRUE;
1395
1396    if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&
1397        format2 == PIPE_FORMAT_B8G8R8A8_UNORM)
1398       return GL_TRUE;
1399
1400    if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&
1401        format2 == PIPE_FORMAT_X8B8G8R8_UNORM)
1402       return GL_TRUE;
1403
1404    if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&
1405        format2 == PIPE_FORMAT_A8B8G8R8_UNORM)
1406       return GL_TRUE;
1407
1408    if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&
1409        format2 == PIPE_FORMAT_X8R8G8B8_UNORM)
1410       return GL_TRUE;
1411
1412    if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&
1413        format2 == PIPE_FORMAT_A8R8G8B8_UNORM)
1414       return GL_TRUE;
1415
1416    return GL_FALSE;
1417 }
1418
1419
1420
1421 /**
1422  * This is used for translating texture border color and the clear
1423  * color.  For example, the clear color is interpreted according to
1424  * the renderbuffer's base format.  For example, if clearing a
1425  * GL_LUMINANCE buffer, ClearColor[0] = luminance and ClearColor[1] =
1426  * alpha.  Similarly for texture border colors.
1427  */
1428 void
1429 st_translate_color(const GLfloat colorIn[4], GLenum baseFormat,
1430                    GLfloat colorOut[4])
1431 {
1432    switch (baseFormat) {
1433    case GL_RED:
1434       colorOut[0] = colorIn[0];
1435       colorOut[1] = 0.0F;
1436       colorOut[2] = 0.0F;
1437       colorOut[3] = 1.0F;
1438       break;
1439    case GL_RG:
1440       colorOut[0] = colorIn[0];
1441       colorOut[1] = colorIn[1];
1442       colorOut[2] = 0.0F;
1443       colorOut[3] = 1.0F;
1444       break;
1445    case GL_RGB:
1446       colorOut[0] = colorIn[0];
1447       colorOut[1] = colorIn[1];
1448       colorOut[2] = colorIn[2];
1449       colorOut[3] = 1.0F;
1450       break;
1451    case GL_ALPHA:
1452       colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
1453       colorOut[3] = colorIn[3];
1454       break;
1455    case GL_LUMINANCE:
1456       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
1457       colorOut[3] = 1.0;
1458       break;
1459    case GL_LUMINANCE_ALPHA:
1460       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
1461       colorOut[3] = colorIn[3];
1462       break;
1463    case GL_INTENSITY:
1464       colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
1465       break;
1466    default:
1467       COPY_4V(colorOut, colorIn);
1468    }
1469 }