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
  72    desc = util_format_description(format);
  73    assert(desc);
  74
  75    if (desc->layout == UTIL_FORMAT_LAYOUT_PLAIN) {
  76       if (format == PIPE_FORMAT_B5G5R5A1_UNORM ||
  77           format == PIPE_FORMAT_B5G6R5_UNORM) {
  78          return GL_UNSIGNED_SHORT;
  79       }
  80       else if (format == PIPE_FORMAT_Z24_UNORM_S8_USCALED ||
  81                format == PIPE_FORMAT_S8_USCALED_Z24_UNORM ||
  82                format == PIPE_FORMAT_Z24X8_UNORM ||
  83                format == PIPE_FORMAT_X8Z24_UNORM) {
  84          return GL_UNSIGNED_INT_24_8;
  85       }
  86       else {
  87          const GLuint size = format_max_bits(format);
  88          if (size == 8) {
  89             if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)
  90                return GL_UNSIGNED_BYTE;
  91             else
  92                return GL_BYTE;
  93          }
  94          else if (size == 16) {
  95             if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)
  96                return GL_UNSIGNED_SHORT;
  97             else
  98                return GL_SHORT;
  99          }
 100          else {
 101             assert( size <= 32 );
 102             if (desc->channel[0].type == UTIL_FORMAT_TYPE_UNSIGNED)
 103                return GL_UNSIGNED_INT;
 104             else
 105                return GL_INT;
 106          }
 107       }
 108    }
 109    else if (format == PIPE_FORMAT_UYVY) {
 110       return GL_UNSIGNED_SHORT;
 111    }
 112    else if (format == PIPE_FORMAT_YUYV) {
 113       return GL_UNSIGNED_SHORT;
 114    }
 115    else {
 116       /* probably a compressed format, unsupported anyway */
 117       return GL_NONE;
 118    }
 119 }
 120
 121
 122 /**
 123  * Translate Mesa format to Gallium format.
 124  */
 125 enum pipe_format
 126 st_mesa_format_to_pipe_format(gl_format mesaFormat)
 127 {
 128    switch (mesaFormat) {
 129    case MESA_FORMAT_RGBA8888:
 130       return PIPE_FORMAT_A8B8G8R8_UNORM;
 131    case MESA_FORMAT_RGBA8888_REV:
 132       return PIPE_FORMAT_R8G8B8A8_UNORM;
 133    case MESA_FORMAT_ARGB8888:
 134       return PIPE_FORMAT_B8G8R8A8_UNORM;
 135    case MESA_FORMAT_ARGB8888_REV:
 136       return PIPE_FORMAT_A8R8G8B8_UNORM;
 137    case MESA_FORMAT_XRGB8888:
 138       return PIPE_FORMAT_B8G8R8X8_UNORM;
 139    case MESA_FORMAT_XRGB8888_REV:
 140       return PIPE_FORMAT_X8R8G8B8_UNORM;
 141    case MESA_FORMAT_ARGB1555:
 142       return PIPE_FORMAT_B5G5R5A1_UNORM;
 143    case MESA_FORMAT_ARGB4444:
 144       return PIPE_FORMAT_B4G4R4A4_UNORM;
 145    case MESA_FORMAT_RGB565:
 146       return PIPE_FORMAT_B5G6R5_UNORM;
 147    case MESA_FORMAT_RGB332:
 148       return PIPE_FORMAT_B2G3R3_UNORM;
 149    case MESA_FORMAT_ARGB2101010:
 150       return PIPE_FORMAT_B10G10R10A2_UNORM;
 151    case MESA_FORMAT_AL44:
 152       return PIPE_FORMAT_L4A4_UNORM;
 153    case MESA_FORMAT_AL88:
 154       return PIPE_FORMAT_L8A8_UNORM;
 155    case MESA_FORMAT_AL1616:
 156       return PIPE_FORMAT_L16A16_UNORM;
 157    case MESA_FORMAT_A8:
 158       return PIPE_FORMAT_A8_UNORM;
 159    case MESA_FORMAT_A16:
 160       return PIPE_FORMAT_A16_UNORM;
 161    case MESA_FORMAT_L8:
 162       return PIPE_FORMAT_L8_UNORM;
 163    case MESA_FORMAT_L16:
 164       return PIPE_FORMAT_L16_UNORM;
 165    case MESA_FORMAT_I8:
 166       return PIPE_FORMAT_I8_UNORM;
 167    case MESA_FORMAT_I16:
 168       return PIPE_FORMAT_I16_UNORM;
 169    case MESA_FORMAT_Z16:
 170       return PIPE_FORMAT_Z16_UNORM;
 171    case MESA_FORMAT_Z32:
 172       return PIPE_FORMAT_Z32_UNORM;
 173    case MESA_FORMAT_Z24_S8:
 174       return PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 175    case MESA_FORMAT_S8_Z24:
 176       return PIPE_FORMAT_Z24_UNORM_S8_USCALED;
 177    case MESA_FORMAT_Z24_X8:
 178       return PIPE_FORMAT_X8Z24_UNORM;
 179    case MESA_FORMAT_X8_Z24:
 180       return PIPE_FORMAT_Z24X8_UNORM;
 181    case MESA_FORMAT_S8:
 182       return PIPE_FORMAT_S8_USCALED;
 183    case MESA_FORMAT_YCBCR:
 184       return PIPE_FORMAT_UYVY;
 185 #if FEATURE_texture_s3tc
 186    case MESA_FORMAT_RGB_DXT1:
 187       return PIPE_FORMAT_DXT1_RGB;
 188    case MESA_FORMAT_RGBA_DXT1:
 189       return PIPE_FORMAT_DXT1_RGBA;
 190    case MESA_FORMAT_RGBA_DXT3:
 191       return PIPE_FORMAT_DXT3_RGBA;
 192    case MESA_FORMAT_RGBA_DXT5:
 193       return PIPE_FORMAT_DXT5_RGBA;
 194 #if FEATURE_EXT_texture_sRGB
 195    case MESA_FORMAT_SRGB_DXT1:
 196       return PIPE_FORMAT_DXT1_SRGB;
 197    case MESA_FORMAT_SRGBA_DXT1:
 198       return PIPE_FORMAT_DXT1_SRGBA;
 199    case MESA_FORMAT_SRGBA_DXT3:
 200       return PIPE_FORMAT_DXT3_SRGBA;
 201    case MESA_FORMAT_SRGBA_DXT5:
 202       return PIPE_FORMAT_DXT5_SRGBA;
 203 #endif
 204 #endif
 205 #if FEATURE_EXT_texture_sRGB
 206    case MESA_FORMAT_SLA8:
 207       return PIPE_FORMAT_L8A8_SRGB;
 208    case MESA_FORMAT_SL8:
 209       return PIPE_FORMAT_L8_SRGB;
 210    case MESA_FORMAT_SRGB8:
 211       return PIPE_FORMAT_R8G8B8_SRGB;
 212    case MESA_FORMAT_SRGBA8:
 213       return PIPE_FORMAT_A8B8G8R8_SRGB;
 214    case MESA_FORMAT_SARGB8:
 215       return PIPE_FORMAT_B8G8R8A8_SRGB;
 216 #endif
 217    case MESA_FORMAT_RGBA_FLOAT32:
 218       return PIPE_FORMAT_R32G32B32A32_FLOAT;
 219    case MESA_FORMAT_RGBA_FLOAT16:
 220       return PIPE_FORMAT_R16G16B16A16_FLOAT;
 221    case MESA_FORMAT_RGB_FLOAT32:
 222       return PIPE_FORMAT_R32G32B32_FLOAT;
 223    case MESA_FORMAT_RGB_FLOAT16:
 224       return PIPE_FORMAT_R16G16B16_FLOAT;
 225    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
 226       return PIPE_FORMAT_L32A32_FLOAT;
 227    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
 228       return PIPE_FORMAT_L16A16_FLOAT;
 229    case MESA_FORMAT_LUMINANCE_FLOAT32:
 230       return PIPE_FORMAT_L32_FLOAT;
 231    case MESA_FORMAT_LUMINANCE_FLOAT16:
 232       return PIPE_FORMAT_L16_FLOAT;
 233    case MESA_FORMAT_ALPHA_FLOAT32:
 234       return PIPE_FORMAT_A32_FLOAT;
 235    case MESA_FORMAT_ALPHA_FLOAT16:
 236       return PIPE_FORMAT_A16_FLOAT;
 237    case MESA_FORMAT_INTENSITY_FLOAT32:
 238       return PIPE_FORMAT_I32_FLOAT;
 239    case MESA_FORMAT_INTENSITY_FLOAT16:
 240       return PIPE_FORMAT_I16_FLOAT;
 241    case MESA_FORMAT_R_FLOAT32:
 242       return PIPE_FORMAT_R32_FLOAT;
 243    case MESA_FORMAT_R_FLOAT16:
 244       return PIPE_FORMAT_R16_FLOAT;
 245    case MESA_FORMAT_RG_FLOAT32:
 246       return PIPE_FORMAT_R32G32_FLOAT;
 247    case MESA_FORMAT_RG_FLOAT16:
 248       return PIPE_FORMAT_R16G16_FLOAT;
 249
 250    case MESA_FORMAT_R8:
 251       return PIPE_FORMAT_R8_UNORM;
 252    case MESA_FORMAT_R16:
 253       return PIPE_FORMAT_R16_UNORM;
 254    case MESA_FORMAT_RG88:
 255       return PIPE_FORMAT_R8G8_UNORM;
 256    case MESA_FORMAT_RG1616:
 257       return PIPE_FORMAT_R16G16_UNORM;
 258    case MESA_FORMAT_RGBA_16:
 259       return PIPE_FORMAT_R16G16B16A16_UNORM;
 260
 261    /* signed int formats */
 262    case MESA_FORMAT_RGBA_INT8:
 263       return PIPE_FORMAT_R8G8B8A8_SSCALED;
 264    case MESA_FORMAT_RGBA_INT16:
 265       return PIPE_FORMAT_R16G16B16A16_SSCALED;
 266    case MESA_FORMAT_RGBA_INT32:
 267       return PIPE_FORMAT_R32G32B32A32_SSCALED;
 268
 269    /* unsigned int formats */
 270    case MESA_FORMAT_RGBA_UINT8:
 271       return PIPE_FORMAT_R8G8B8A8_USCALED;
 272    case MESA_FORMAT_RGBA_UINT16:
 273       return PIPE_FORMAT_R16G16B16A16_USCALED;
 274    case MESA_FORMAT_RGBA_UINT32:
 275       return PIPE_FORMAT_R32G32B32A32_USCALED;
 276
 277    case MESA_FORMAT_RED_RGTC1:
 278       return PIPE_FORMAT_RGTC1_UNORM;
 279    case MESA_FORMAT_SIGNED_RED_RGTC1:
 280       return PIPE_FORMAT_RGTC1_SNORM;
 281    case MESA_FORMAT_RG_RGTC2:
 282       return PIPE_FORMAT_RGTC2_UNORM;
 283    case MESA_FORMAT_SIGNED_RG_RGTC2:
 284       return PIPE_FORMAT_RGTC2_SNORM;
 285
 286    case MESA_FORMAT_L_LATC1:
 287       return PIPE_FORMAT_LATC1_UNORM;
 288    case MESA_FORMAT_SIGNED_L_LATC1:
 289       return PIPE_FORMAT_LATC1_SNORM;
 290    case MESA_FORMAT_LA_LATC2:
 291       return PIPE_FORMAT_LATC2_UNORM;
 292    case MESA_FORMAT_SIGNED_LA_LATC2:
 293       return PIPE_FORMAT_LATC2_SNORM;
 294
 295    /* signed normalized formats */
 296    case MESA_FORMAT_SIGNED_R8:
 297       return PIPE_FORMAT_R8_SNORM;
 298    case MESA_FORMAT_SIGNED_RG88_REV:
 299       return PIPE_FORMAT_R8G8_SNORM;
 300    case MESA_FORMAT_SIGNED_RGBA8888_REV:
 301       return PIPE_FORMAT_R8G8B8A8_SNORM;
 302
 303    case MESA_FORMAT_SIGNED_A8:
 304       return PIPE_FORMAT_A8_SNORM;
 305    case MESA_FORMAT_SIGNED_L8:
 306       return PIPE_FORMAT_L8_SNORM;
 307    case MESA_FORMAT_SIGNED_AL88:
 308       return PIPE_FORMAT_L8A8_SNORM;
 309    case MESA_FORMAT_SIGNED_I8:
 310       return PIPE_FORMAT_I8_SNORM;
 311
 312    case MESA_FORMAT_SIGNED_R16:
 313       return PIPE_FORMAT_R16_SNORM;
 314    case MESA_FORMAT_SIGNED_GR1616:
 315       return PIPE_FORMAT_R16G16_SNORM;
 316    case MESA_FORMAT_SIGNED_RGBA_16:
 317       return PIPE_FORMAT_R16G16B16A16_SNORM;
 318
 319    case MESA_FORMAT_SIGNED_A16:
 320       return PIPE_FORMAT_A16_SNORM;
 321    case MESA_FORMAT_SIGNED_L16:
 322       return PIPE_FORMAT_L16_SNORM;
 323    case MESA_FORMAT_SIGNED_AL1616:
 324       return PIPE_FORMAT_L16A16_SNORM;
 325    case MESA_FORMAT_SIGNED_I16:
 326       return PIPE_FORMAT_I16_SNORM;
 327
 328    default:
 329       assert(0);
 330       return PIPE_FORMAT_NONE;
 331    }
 332 }
 333
 334
 335 /**
 336  * Translate Gallium format to Mesa format.
 337  */
 338 gl_format
 339 st_pipe_format_to_mesa_format(enum pipe_format format)
 340 {
 341    switch (format) {
 342    case PIPE_FORMAT_A8B8G8R8_UNORM:
 343       return MESA_FORMAT_RGBA8888;
 344    case PIPE_FORMAT_R8G8B8A8_UNORM:
 345       return MESA_FORMAT_RGBA8888_REV;
 346    case PIPE_FORMAT_B8G8R8A8_UNORM:
 347       return MESA_FORMAT_ARGB8888;
 348    case PIPE_FORMAT_A8R8G8B8_UNORM:
 349       return MESA_FORMAT_ARGB8888_REV;
 350    case PIPE_FORMAT_B8G8R8X8_UNORM:
 351       return MESA_FORMAT_XRGB8888;
 352    case PIPE_FORMAT_X8R8G8B8_UNORM:
 353       return MESA_FORMAT_XRGB8888_REV;
 354    case PIPE_FORMAT_B5G5R5A1_UNORM:
 355       return MESA_FORMAT_ARGB1555;
 356    case PIPE_FORMAT_B4G4R4A4_UNORM:
 357       return MESA_FORMAT_ARGB4444;
 358    case PIPE_FORMAT_B5G6R5_UNORM:
 359       return MESA_FORMAT_RGB565;
 360    case PIPE_FORMAT_B2G3R3_UNORM:
 361       return MESA_FORMAT_RGB332;
 362    case PIPE_FORMAT_B10G10R10A2_UNORM:
 363       return MESA_FORMAT_ARGB2101010;
 364    case PIPE_FORMAT_L4A4_UNORM:
 365       return MESA_FORMAT_AL44;
 366    case PIPE_FORMAT_L8A8_UNORM:
 367       return MESA_FORMAT_AL88;
 368    case PIPE_FORMAT_L16A16_UNORM:
 369       return MESA_FORMAT_AL1616;
 370    case PIPE_FORMAT_A8_UNORM:
 371       return MESA_FORMAT_A8;
 372    case PIPE_FORMAT_A16_UNORM:
 373       return MESA_FORMAT_A16;
 374    case PIPE_FORMAT_L8_UNORM:
 375       return MESA_FORMAT_L8;
 376    case PIPE_FORMAT_L16_UNORM:
 377       return MESA_FORMAT_L16;
 378    case PIPE_FORMAT_I8_UNORM:
 379       return MESA_FORMAT_I8;
 380    case PIPE_FORMAT_I16_UNORM:
 381       return MESA_FORMAT_I16;
 382    case PIPE_FORMAT_S8_USCALED:
 383       return MESA_FORMAT_S8;
 384
 385    case PIPE_FORMAT_R16G16B16A16_UNORM:
 386       return MESA_FORMAT_RGBA_16;
 387
 388    case PIPE_FORMAT_Z16_UNORM:
 389       return MESA_FORMAT_Z16;
 390    case PIPE_FORMAT_Z32_UNORM:
 391       return MESA_FORMAT_Z32;
 392    case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 393       return MESA_FORMAT_Z24_S8;
 394    case PIPE_FORMAT_X8Z24_UNORM:
 395       return MESA_FORMAT_Z24_X8;
 396    case PIPE_FORMAT_Z24X8_UNORM:
 397       return MESA_FORMAT_X8_Z24;
 398    case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 399       return MESA_FORMAT_S8_Z24;
 400
 401    case PIPE_FORMAT_UYVY:
 402       return MESA_FORMAT_YCBCR;
 403    case PIPE_FORMAT_YUYV:
 404       return MESA_FORMAT_YCBCR_REV;
 405
 406 #if FEATURE_texture_s3tc
 407    case PIPE_FORMAT_DXT1_RGB:
 408       return MESA_FORMAT_RGB_DXT1;
 409    case PIPE_FORMAT_DXT1_RGBA:
 410       return MESA_FORMAT_RGBA_DXT1;
 411    case PIPE_FORMAT_DXT3_RGBA:
 412       return MESA_FORMAT_RGBA_DXT3;
 413    case PIPE_FORMAT_DXT5_RGBA:
 414       return MESA_FORMAT_RGBA_DXT5;
 415 #if FEATURE_EXT_texture_sRGB
 416    case PIPE_FORMAT_DXT1_SRGB:
 417       return MESA_FORMAT_SRGB_DXT1;
 418    case PIPE_FORMAT_DXT1_SRGBA:
 419       return MESA_FORMAT_SRGBA_DXT1;
 420    case PIPE_FORMAT_DXT3_SRGBA:
 421       return MESA_FORMAT_SRGBA_DXT3;
 422    case PIPE_FORMAT_DXT5_SRGBA:
 423       return MESA_FORMAT_SRGBA_DXT5;
 424 #endif
 425 #endif
 426
 427 #if FEATURE_EXT_texture_sRGB
 428    case PIPE_FORMAT_L8A8_SRGB:
 429       return MESA_FORMAT_SLA8;
 430    case PIPE_FORMAT_L8_SRGB:
 431       return MESA_FORMAT_SL8;
 432    case PIPE_FORMAT_R8G8B8_SRGB:
 433       return MESA_FORMAT_SRGB8;
 434    case PIPE_FORMAT_A8B8G8R8_SRGB:
 435       return MESA_FORMAT_SRGBA8;
 436    case PIPE_FORMAT_B8G8R8A8_SRGB:
 437       return MESA_FORMAT_SARGB8;
 438 #endif
 439    case PIPE_FORMAT_R32G32B32A32_FLOAT:
 440       return MESA_FORMAT_RGBA_FLOAT32;
 441    case PIPE_FORMAT_R16G16B16A16_FLOAT:
 442       return MESA_FORMAT_RGBA_FLOAT16;
 443    case PIPE_FORMAT_R32G32B32_FLOAT:
 444       return MESA_FORMAT_RGB_FLOAT32;
 445    case PIPE_FORMAT_R16G16B16_FLOAT:
 446       return MESA_FORMAT_RGB_FLOAT16;
 447    case PIPE_FORMAT_L32A32_FLOAT:
 448       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
 449    case PIPE_FORMAT_L16A16_FLOAT:
 450       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
 451    case PIPE_FORMAT_L32_FLOAT:
 452       return MESA_FORMAT_LUMINANCE_FLOAT32;
 453    case PIPE_FORMAT_L16_FLOAT:
 454       return MESA_FORMAT_LUMINANCE_FLOAT16;
 455    case PIPE_FORMAT_A32_FLOAT:
 456       return MESA_FORMAT_ALPHA_FLOAT32;
 457    case PIPE_FORMAT_A16_FLOAT:
 458       return MESA_FORMAT_ALPHA_FLOAT16;
 459    case PIPE_FORMAT_I32_FLOAT:
 460       return MESA_FORMAT_INTENSITY_FLOAT32;
 461    case PIPE_FORMAT_I16_FLOAT:
 462       return MESA_FORMAT_INTENSITY_FLOAT16;
 463    case PIPE_FORMAT_R32_FLOAT:
 464       return MESA_FORMAT_R_FLOAT32;
 465    case PIPE_FORMAT_R16_FLOAT:
 466       return MESA_FORMAT_R_FLOAT16;
 467    case PIPE_FORMAT_R32G32_FLOAT:
 468       return MESA_FORMAT_RG_FLOAT32;
 469    case PIPE_FORMAT_R16G16_FLOAT:
 470       return MESA_FORMAT_RG_FLOAT16;
 471
 472    case PIPE_FORMAT_R8_UNORM:
 473       return MESA_FORMAT_R8;
 474    case PIPE_FORMAT_R16_UNORM:
 475       return MESA_FORMAT_R16;
 476    case PIPE_FORMAT_R8G8_UNORM:
 477       return MESA_FORMAT_RG88;
 478    case PIPE_FORMAT_R16G16_UNORM:
 479       return MESA_FORMAT_RG1616;
 480
 481    /* signed int formats */
 482    case PIPE_FORMAT_R8G8B8A8_SSCALED:
 483       return MESA_FORMAT_RGBA_INT8;
 484    case PIPE_FORMAT_R16G16B16A16_SSCALED:
 485       return MESA_FORMAT_RGBA_INT16;
 486    case PIPE_FORMAT_R32G32B32A32_SSCALED:
 487       return MESA_FORMAT_RGBA_INT32;
 488
 489    /* unsigned int formats */
 490    case PIPE_FORMAT_R8G8B8A8_USCALED:
 491       return MESA_FORMAT_RGBA_UINT8;
 492    case PIPE_FORMAT_R16G16B16A16_USCALED:
 493       return MESA_FORMAT_RGBA_UINT16;
 494    case PIPE_FORMAT_R32G32B32A32_USCALED:
 495       return MESA_FORMAT_RGBA_UINT32;
 496
 497    case PIPE_FORMAT_RGTC1_UNORM:
 498       return MESA_FORMAT_RED_RGTC1;
 499    case PIPE_FORMAT_RGTC1_SNORM:
 500       return MESA_FORMAT_SIGNED_RED_RGTC1;
 501    case PIPE_FORMAT_RGTC2_UNORM:
 502       return MESA_FORMAT_RG_RGTC2;
 503    case PIPE_FORMAT_RGTC2_SNORM:
 504       return MESA_FORMAT_SIGNED_RG_RGTC2;
 505
 506    case PIPE_FORMAT_LATC1_UNORM:
 507       return MESA_FORMAT_L_LATC1;
 508    case PIPE_FORMAT_LATC1_SNORM:
 509       return MESA_FORMAT_SIGNED_L_LATC1;
 510    case PIPE_FORMAT_LATC2_UNORM:
 511       return MESA_FORMAT_LA_LATC2;
 512    //case PIPE_FORMAT_LATC2_SNORM:
 513    //   return MESA_FORMAT_SIGNED_LA_LATC2;
 514
 515    /* signed normalized formats */
 516    case PIPE_FORMAT_R8_SNORM:
 517       return MESA_FORMAT_SIGNED_R8;
 518    case PIPE_FORMAT_R8G8_SNORM:
 519       return MESA_FORMAT_SIGNED_RG88_REV;
 520    case PIPE_FORMAT_R8G8B8A8_SNORM:
 521       return MESA_FORMAT_SIGNED_RGBA8888_REV;
 522
 523    case PIPE_FORMAT_A8_SNORM:
 524       return MESA_FORMAT_SIGNED_A8;
 525    case PIPE_FORMAT_L8_SNORM:
 526       return MESA_FORMAT_SIGNED_L8;
 527    case PIPE_FORMAT_L8A8_SNORM:
 528       return MESA_FORMAT_SIGNED_AL88;
 529    case PIPE_FORMAT_I8_SNORM:
 530       return MESA_FORMAT_SIGNED_I8;
 531
 532    case PIPE_FORMAT_R16_SNORM:
 533       return MESA_FORMAT_SIGNED_R16;
 534    case PIPE_FORMAT_R16G16_SNORM:
 535       return MESA_FORMAT_SIGNED_GR1616;
 536    case PIPE_FORMAT_R16G16B16A16_SNORM:
 537       return MESA_FORMAT_SIGNED_RGBA_16;
 538
 539    case PIPE_FORMAT_A16_SNORM:
 540       return MESA_FORMAT_SIGNED_A16;
 541    case PIPE_FORMAT_L16_SNORM:
 542       return MESA_FORMAT_SIGNED_L16;
 543    case PIPE_FORMAT_L16A16_SNORM:
 544       return MESA_FORMAT_SIGNED_AL1616;
 545    case PIPE_FORMAT_I16_SNORM:
 546       return MESA_FORMAT_SIGNED_I16;
 547
 548    default:
 549       assert(0);
 550       return MESA_FORMAT_NONE;
 551    }
 552 }
 553
 554
 555 /**
 556  * Return first supported format from the given list.
 557  */
 558 static enum pipe_format
 559 find_supported_format(struct pipe_screen *screen,
 560                       const enum pipe_format formats[],
 561                       uint num_formats,
 562                       enum pipe_texture_target target,
 563                       unsigned sample_count,
 564                       unsigned tex_usage)
 565 {
 566    uint i;
 567    for (i = 0; i < num_formats; i++) {
 568       if (screen->is_format_supported(screen, formats[i], target,
 569                                       sample_count, tex_usage)) {
 570          return formats[i];
 571       }
 572    }
 573    return PIPE_FORMAT_NONE;
 574 }
 575
 576
 577 /**
 578  * Find an RGBA format supported by the context/winsys.
 579  */
 580 static enum pipe_format
 581 default_rgba_format(struct pipe_screen *screen,
 582                     enum pipe_texture_target target,
 583                     unsigned sample_count,
 584                     unsigned tex_usage)
 585 {
 586    static const enum pipe_format colorFormats[] = {
 587       PIPE_FORMAT_B8G8R8A8_UNORM,
 588       PIPE_FORMAT_A8R8G8B8_UNORM,
 589       PIPE_FORMAT_A8B8G8R8_UNORM,
 590       PIPE_FORMAT_B5G6R5_UNORM
 591    };
 592    return find_supported_format(screen, colorFormats, Elements(colorFormats),
 593                                 target, sample_count, tex_usage);
 594 }
 595
 596
 597 /**
 598  * Find an RGB format supported by the context/winsys.
 599  */
 600 static enum pipe_format
 601 default_rgb_format(struct pipe_screen *screen,
 602                    enum pipe_texture_target target,
 603                    unsigned sample_count,
 604                    unsigned tex_usage)
 605 {
 606    static const enum pipe_format colorFormats[] = {
 607       PIPE_FORMAT_B8G8R8X8_UNORM,
 608       PIPE_FORMAT_X8R8G8B8_UNORM,
 609       PIPE_FORMAT_X8B8G8R8_UNORM,
 610       PIPE_FORMAT_B8G8R8A8_UNORM,
 611       PIPE_FORMAT_A8R8G8B8_UNORM,
 612       PIPE_FORMAT_A8B8G8R8_UNORM,
 613       PIPE_FORMAT_B5G6R5_UNORM
 614    };
 615    return find_supported_format(screen, colorFormats, Elements(colorFormats),
 616                                 target, sample_count, tex_usage);
 617 }
 618
 619 /**
 620  * Find an sRGBA format supported by the context/winsys.
 621  */
 622 static enum pipe_format
 623 default_srgba_format(struct pipe_screen *screen,
 624                     enum pipe_texture_target target,
 625                     unsigned sample_count,
 626                     unsigned tex_usage)
 627 {
 628    static const enum pipe_format colorFormats[] = {
 629       PIPE_FORMAT_B8G8R8A8_SRGB,
 630       PIPE_FORMAT_A8R8G8B8_SRGB,
 631       PIPE_FORMAT_A8B8G8R8_SRGB,
 632    };
 633    return find_supported_format(screen, colorFormats, Elements(colorFormats),
 634                                 target, sample_count, tex_usage);
 635 }
 636
 637
 638 /**
 639  * Given an OpenGL internalFormat value for a texture or surface, return
 640  * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
 641  * This is called during glTexImage2D, for example.
 642  *
 643  * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
 644  * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
 645  * we want render-to-texture ability.
 646  *
 647  * \param internalFormat  the user value passed to glTexImage2D
 648  * \param target  one of PIPE_TEXTURE_x
 649  * \param bindings  bitmask of PIPE_BIND_x flags.
 650  */
 651 enum pipe_format
 652 st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
 653                  enum pipe_texture_target target, unsigned sample_count,
 654                  unsigned bindings)
 655 {
 656
 657    switch (internalFormat) {
 658    case GL_RGB10:
 659    case GL_RGB10_A2:
 660       if (screen->is_format_supported( screen, PIPE_FORMAT_B10G10R10A2_UNORM,
 661                                        target, sample_count, bindings))
 662          return PIPE_FORMAT_B10G10R10A2_UNORM;
 663       /* Pass through. */
 664    case 4:
 665    case GL_RGBA:
 666    case GL_RGBA8:
 667       return default_rgba_format( screen, target, sample_count, bindings);
 668
 669    case GL_BGRA:
 670       if (screen->is_format_supported( screen, PIPE_FORMAT_B8G8R8A8_UNORM,
 671                                        target, sample_count, bindings))
 672          return PIPE_FORMAT_B8G8R8A8_UNORM;
 673       return default_rgba_format( screen, target, sample_count, bindings);
 674
 675    case 3:
 676    case GL_RGB:
 677    case GL_RGB8:
 678       return default_rgb_format( screen, target, sample_count, bindings);
 679
 680    case GL_RGB12:
 681    case GL_RGB16:
 682    case GL_RGBA12:
 683    case GL_RGBA16:
 684       if (screen->is_format_supported( screen, PIPE_FORMAT_R16G16B16A16_UNORM,
 685                                              target, sample_count, bindings))
 686          return PIPE_FORMAT_R16G16B16A16_UNORM;
 687       return default_rgba_format( screen, target, sample_count, bindings);
 688
 689    case GL_RGBA4:
 690    case GL_RGBA2:
 691       if (screen->is_format_supported( screen, PIPE_FORMAT_B4G4R4A4_UNORM,
 692                                        target, sample_count, bindings))
 693          return PIPE_FORMAT_B4G4R4A4_UNORM;
 694       return default_rgba_format( screen, target, sample_count, bindings);
 695
 696    case GL_RGB5_A1:
 697       if (screen->is_format_supported( screen, PIPE_FORMAT_B5G5R5A1_UNORM,
 698                                        target, sample_count, bindings))
 699          return PIPE_FORMAT_B5G5R5A1_UNORM;
 700       return default_rgba_format( screen, target, sample_count, bindings);
 701
 702    case GL_R3_G3_B2:
 703       if (screen->is_format_supported( screen, PIPE_FORMAT_B2G3R3_UNORM,
 704                                        target, sample_count, bindings))
 705          return PIPE_FORMAT_B2G3R3_UNORM;
 706       /* Pass through. */
 707    case GL_RGB5:
 708    case GL_RGB4:
 709       if (screen->is_format_supported( screen, PIPE_FORMAT_B5G6R5_UNORM,
 710                                        target, sample_count, bindings))
 711          return PIPE_FORMAT_B5G6R5_UNORM;
 712       if (screen->is_format_supported( screen, PIPE_FORMAT_B5G5R5A1_UNORM,
 713                                        target, sample_count, bindings))
 714          return PIPE_FORMAT_B5G5R5A1_UNORM;
 715       return default_rgba_format( screen, target, sample_count, bindings);
 716
 717    case GL_ALPHA12:
 718    case GL_ALPHA16:
 719       if (screen->is_format_supported( screen, PIPE_FORMAT_A16_UNORM, target,
 720                                        sample_count, bindings))
 721          return PIPE_FORMAT_A16_UNORM;
 722       /* Pass through. */
 723    case GL_ALPHA:
 724    case GL_ALPHA4:
 725    case GL_ALPHA8:
 726    case GL_COMPRESSED_ALPHA:
 727       if (screen->is_format_supported( screen, PIPE_FORMAT_A8_UNORM, target,
 728                                        sample_count, bindings))
 729          return PIPE_FORMAT_A8_UNORM;
 730       return default_rgba_format( screen, target, sample_count, bindings);
 731
 732    case GL_LUMINANCE12:
 733    case GL_LUMINANCE16:
 734       if (screen->is_format_supported( screen, PIPE_FORMAT_L16_UNORM, target,
 735                                        sample_count, bindings))
 736          return PIPE_FORMAT_L16_UNORM;
 737       /* Pass through. */
 738    case 1:
 739    case GL_LUMINANCE:
 740    case GL_LUMINANCE4:
 741    case GL_LUMINANCE8:
 742       if (screen->is_format_supported( screen, PIPE_FORMAT_L8_UNORM, target,
 743                                        sample_count, bindings))
 744          return PIPE_FORMAT_L8_UNORM;
 745       return default_rgba_format( screen, target, sample_count, bindings);
 746
 747    case GL_LUMINANCE12_ALPHA4:
 748    case GL_LUMINANCE12_ALPHA12:
 749    case GL_LUMINANCE16_ALPHA16:
 750       if (screen->is_format_supported( screen, PIPE_FORMAT_L16A16_UNORM, target,
 751                                        sample_count, bindings))
 752          return PIPE_FORMAT_L16A16_UNORM;
 753       /* Pass through. */
 754    case 2:
 755    case GL_LUMINANCE_ALPHA:
 756    case GL_LUMINANCE6_ALPHA2:
 757    case GL_LUMINANCE8_ALPHA8:
 758       if (screen->is_format_supported( screen, PIPE_FORMAT_L8A8_UNORM, target,
 759                                        sample_count, bindings))
 760          return PIPE_FORMAT_L8A8_UNORM;
 761       return default_rgba_format( screen, target, sample_count, bindings);
 762
 763    case GL_LUMINANCE4_ALPHA4:
 764       if (screen->is_format_supported( screen, PIPE_FORMAT_L4A4_UNORM, target,
 765                                        sample_count, bindings))
 766          return PIPE_FORMAT_L4A4_UNORM;
 767       if (screen->is_format_supported( screen, PIPE_FORMAT_L8A8_UNORM, target,
 768                                        sample_count, bindings))
 769          return PIPE_FORMAT_L8A8_UNORM;
 770       return default_rgba_format( screen, target, sample_count, bindings);
 771
 772    case GL_INTENSITY12:
 773    case GL_INTENSITY16:
 774       if (screen->is_format_supported( screen, PIPE_FORMAT_I16_UNORM, target,
 775                                        sample_count, bindings))
 776          return PIPE_FORMAT_I16_UNORM;
 777       /* Pass through. */
 778    case GL_INTENSITY:
 779    case GL_INTENSITY4:
 780    case GL_INTENSITY8:
 781    case GL_COMPRESSED_INTENSITY:
 782       if (screen->is_format_supported( screen, PIPE_FORMAT_I8_UNORM, target,
 783                                        sample_count, bindings))
 784          return PIPE_FORMAT_I8_UNORM;
 785       return default_rgba_format( screen, target, sample_count, bindings);
 786
 787    case GL_YCBCR_MESA:
 788       if (screen->is_format_supported(screen, PIPE_FORMAT_UYVY, target,
 789                                       sample_count, bindings)) {
 790          return PIPE_FORMAT_UYVY;
 791       }
 792       if (screen->is_format_supported(screen, PIPE_FORMAT_YUYV, target,
 793                                       sample_count, bindings)) {
 794          return PIPE_FORMAT_YUYV;
 795       }
 796       return PIPE_FORMAT_NONE;
 797
 798    case GL_COMPRESSED_RGB:
 799       /* can only sample from compressed formats */
 800       if (bindings & ~PIPE_BIND_SAMPLER_VIEW)
 801          return PIPE_FORMAT_NONE;
 802       else if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGB,
 803                                            target, sample_count, bindings))
 804          return PIPE_FORMAT_DXT1_RGB;
 805       else
 806          return default_rgb_format(screen, target, sample_count, bindings);
 807
 808    case GL_COMPRESSED_RGBA:
 809       /* can only sample from compressed formats */
 810       if (bindings & ~PIPE_BIND_SAMPLER_VIEW)
 811          return PIPE_FORMAT_NONE;
 812       else if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_RGBA,
 813                                            target, sample_count, bindings))
 814          return PIPE_FORMAT_DXT3_RGBA;
 815       else
 816          return default_rgba_format(screen, target, sample_count, bindings);
 817
 818    case GL_RGB_S3TC:
 819    case GL_RGB4_S3TC:
 820    case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 821       if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGB,
 822                                       target, sample_count, bindings))
 823          return PIPE_FORMAT_DXT1_RGB;
 824       else
 825          return PIPE_FORMAT_NONE;
 826
 827    case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
 828       if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_RGBA,
 829                                       target, sample_count, bindings))
 830          return PIPE_FORMAT_DXT1_RGBA;
 831       else
 832          return PIPE_FORMAT_NONE;
 833
 834    case GL_RGBA_S3TC:
 835    case GL_RGBA4_S3TC:
 836    case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
 837       if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_RGBA,
 838                                       target, sample_count, bindings))
 839          return PIPE_FORMAT_DXT3_RGBA;
 840       else
 841          return PIPE_FORMAT_NONE;
 842
 843    case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
 844       if (screen->is_format_supported(screen, PIPE_FORMAT_DXT5_RGBA,
 845                                       target, sample_count, bindings))
 846          return PIPE_FORMAT_DXT5_RGBA;
 847       else
 848          return PIPE_FORMAT_NONE;
 849
 850 #if 0
 851    case GL_COMPRESSED_RGB_FXT1_3DFX:
 852       return PIPE_FORMAT_RGB_FXT1;
 853    case GL_COMPRESSED_RGBA_FXT1_3DFX:
 854       return PIPE_FORMAT_RGB_FXT1;
 855 #endif
 856
 857    case GL_DEPTH_COMPONENT16:
 858       if (screen->is_format_supported(screen, PIPE_FORMAT_Z16_UNORM, target,
 859                                       sample_count, bindings))
 860          return PIPE_FORMAT_Z16_UNORM;
 861       /* fall-through */
 862    case GL_DEPTH_COMPONENT24:
 863       if (screen->is_format_supported(screen, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 864                                       target, sample_count, bindings))
 865          return PIPE_FORMAT_Z24_UNORM_S8_USCALED;
 866       if (screen->is_format_supported(screen, PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 867                                       target, sample_count, bindings))
 868          return PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 869       /* fall-through */
 870    case GL_DEPTH_COMPONENT32:
 871       if (screen->is_format_supported(screen, PIPE_FORMAT_Z32_UNORM, target,
 872                                       sample_count, bindings))
 873          return PIPE_FORMAT_Z32_UNORM;
 874       /* fall-through */
 875    case GL_DEPTH_COMPONENT:
 876       {
 877          static const enum pipe_format formats[] = {
 878             PIPE_FORMAT_Z32_UNORM,
 879             PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 880             PIPE_FORMAT_S8_USCALED_Z24_UNORM,
 881             PIPE_FORMAT_Z16_UNORM
 882          };
 883          return find_supported_format(screen, formats, Elements(formats),
 884                                       target, sample_count, bindings);
 885       }
 886
 887    case GL_STENCIL_INDEX:
 888    case GL_STENCIL_INDEX1_EXT:
 889    case GL_STENCIL_INDEX4_EXT:
 890    case GL_STENCIL_INDEX8_EXT:
 891    case GL_STENCIL_INDEX16_EXT:
 892       {
 893          static const enum pipe_format formats[] = {
 894             PIPE_FORMAT_S8_USCALED,
 895             PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 896             PIPE_FORMAT_S8_USCALED_Z24_UNORM
 897          };
 898          return find_supported_format(screen, formats, Elements(formats),
 899                                       target, sample_count, bindings);
 900       }
 901
 902    case GL_DEPTH_STENCIL_EXT:
 903    case GL_DEPTH24_STENCIL8_EXT:
 904       {
 905          static const enum pipe_format formats[] = {
 906             PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 907             PIPE_FORMAT_S8_USCALED_Z24_UNORM
 908          };
 909          return find_supported_format(screen, formats, Elements(formats),
 910                                       target, sample_count, bindings);
 911       }
 912
 913    case GL_SRGB_EXT:
 914    case GL_SRGB8_EXT:
 915    case GL_SRGB_ALPHA_EXT:
 916    case GL_SRGB8_ALPHA8_EXT:
 917       return default_srgba_format( screen, target, sample_count, bindings);
 918
 919    case GL_COMPRESSED_SRGB_EXT:
 920    case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT:
 921       if (screen->is_format_supported(screen, PIPE_FORMAT_DXT1_SRGB, target,
 922                                       sample_count, bindings))
 923          return PIPE_FORMAT_DXT1_SRGB;
 924       return default_srgba_format( screen, target, sample_count, bindings);
 925
 926    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT:
 927       return PIPE_FORMAT_DXT1_SRGBA;
 928
 929    case GL_COMPRESSED_SRGB_ALPHA_EXT:
 930    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT:
 931       if (screen->is_format_supported(screen, PIPE_FORMAT_DXT3_SRGBA, target,
 932                                       sample_count, bindings))
 933          return PIPE_FORMAT_DXT3_SRGBA;
 934       return default_srgba_format( screen, target, sample_count, bindings);
 935
 936    case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT:
 937       return PIPE_FORMAT_DXT5_SRGBA;
 938
 939    case GL_SLUMINANCE_ALPHA_EXT:
 940    case GL_SLUMINANCE8_ALPHA8_EXT:
 941    case GL_COMPRESSED_SLUMINANCE_EXT:
 942    case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT:
 943       if (screen->is_format_supported(screen, PIPE_FORMAT_L8A8_SRGB, target,
 944                                       sample_count, bindings))
 945          return PIPE_FORMAT_L8A8_SRGB;
 946       return default_srgba_format( screen, target, sample_count, bindings);
 947
 948    case GL_SLUMINANCE_EXT:
 949    case GL_SLUMINANCE8_EXT:
 950       if (screen->is_format_supported(screen, PIPE_FORMAT_L8_SRGB, target,
 951                                       sample_count, bindings))
 952          return PIPE_FORMAT_L8_SRGB;
 953       return default_srgba_format( screen, target, sample_count, bindings);
 954
 955    /* prefer formats in order of data size, choosing 16-bit ones if equal sized */
 956    case GL_RGBA16F_ARB:
 957    case GL_RGB16F_ARB:
 958       {
 959          static const enum pipe_format formats[] = {
 960                PIPE_FORMAT_R16G16B16A16_FLOAT,
 961                PIPE_FORMAT_R32G32B32A32_FLOAT
 962          };
 963          return find_supported_format(screen, formats, Elements(formats),
 964                target, sample_count, bindings);
 965       }
 966    case GL_LUMINANCE_ALPHA16F_ARB:
 967       {
 968          static const enum pipe_format formats[] = {
 969                PIPE_FORMAT_L16A16_FLOAT,
 970                PIPE_FORMAT_R16G16B16A16_FLOAT,
 971                PIPE_FORMAT_L32A32_FLOAT,
 972                PIPE_FORMAT_R32G32B32A32_FLOAT
 973          };
 974          return find_supported_format(screen, formats, Elements(formats),
 975                target, sample_count, bindings);
 976       }
 977    case GL_ALPHA16F_ARB:
 978       {
 979          static const enum pipe_format formats[] = {
 980                PIPE_FORMAT_A16_FLOAT,
 981                PIPE_FORMAT_L16A16_FLOAT,
 982                PIPE_FORMAT_A32_FLOAT,
 983                PIPE_FORMAT_R16G16B16A16_FLOAT,
 984                PIPE_FORMAT_L32A32_FLOAT,
 985                PIPE_FORMAT_R32G32B32A32_FLOAT
 986          };
 987          return find_supported_format(screen, formats, Elements(formats),
 988                target, sample_count, bindings);
 989       }
 990    case GL_INTENSITY16F_ARB:
 991       {
 992          static const enum pipe_format formats[] = {
 993                PIPE_FORMAT_I16_FLOAT,
 994                PIPE_FORMAT_L16A16_FLOAT,
 995                PIPE_FORMAT_I32_FLOAT,
 996                PIPE_FORMAT_R16G16B16A16_FLOAT,
 997                PIPE_FORMAT_L32A32_FLOAT,
 998                PIPE_FORMAT_R32G32B32A32_FLOAT
 999          };
1000          return find_supported_format(screen, formats, Elements(formats),
1001                target, sample_count, bindings);
1002       }
1003    case GL_LUMINANCE16F_ARB:
1004       {
1005          static const enum pipe_format formats[] = {
1006                PIPE_FORMAT_L16_FLOAT,
1007                PIPE_FORMAT_L16A16_FLOAT,
1008                PIPE_FORMAT_L32_FLOAT,
1009                PIPE_FORMAT_R16G16B16A16_FLOAT,
1010                PIPE_FORMAT_L32A32_FLOAT,
1011                PIPE_FORMAT_R32G32B32A32_FLOAT
1012          };
1013          return find_supported_format(screen, formats, Elements(formats),
1014                target, sample_count, bindings);
1015       }
1016    case GL_R16F:
1017       {
1018          static const enum pipe_format formats[] = {
1019                PIPE_FORMAT_R16_FLOAT,
1020                PIPE_FORMAT_R16G16_FLOAT,
1021                PIPE_FORMAT_R32_FLOAT,
1022                PIPE_FORMAT_R16G16B16A16_FLOAT,
1023                PIPE_FORMAT_R32G32_FLOAT,
1024                PIPE_FORMAT_R32G32B32A32_FLOAT
1025          };
1026          return find_supported_format(screen, formats, Elements(formats),
1027                target, sample_count, bindings);
1028       }
1029    case GL_RG16F:
1030       {
1031          static const enum pipe_format formats[] = {
1032                PIPE_FORMAT_R16G16_FLOAT,
1033                PIPE_FORMAT_R16G16B16A16_FLOAT,
1034                PIPE_FORMAT_R32G32_FLOAT,
1035                PIPE_FORMAT_R32G32B32A32_FLOAT
1036          };
1037          return find_supported_format(screen, formats, Elements(formats),
1038                target, sample_count, bindings);
1039       }
1040
1041    /* try a 32-bit format if available, otherwise fallback to a 16-bit one */
1042    case GL_RGBA32F_ARB:
1043    case GL_RGB32F_ARB:
1044       {
1045          static const enum pipe_format formats[] = {
1046                PIPE_FORMAT_R32G32B32A32_FLOAT,
1047                PIPE_FORMAT_R16G16B16A16_FLOAT
1048          };
1049          return find_supported_format(screen, formats, Elements(formats),
1050                target, sample_count, bindings);
1051       }
1052    case GL_LUMINANCE_ALPHA32F_ARB:
1053       {
1054          static const enum pipe_format formats[] = {
1055                PIPE_FORMAT_L32A32_FLOAT,
1056                PIPE_FORMAT_R32G32B32A32_FLOAT,
1057                PIPE_FORMAT_L16A16_FLOAT,
1058                PIPE_FORMAT_R16G16B16A16_FLOAT
1059          };
1060          return find_supported_format(screen, formats, Elements(formats),
1061                target, sample_count, bindings);
1062       }
1063    case GL_ALPHA32F_ARB:
1064       {
1065          static const enum pipe_format formats[] = {
1066                PIPE_FORMAT_A32_FLOAT,
1067                PIPE_FORMAT_L32A32_FLOAT,
1068                PIPE_FORMAT_R32G32B32A32_FLOAT,
1069                PIPE_FORMAT_A16_FLOAT,
1070                PIPE_FORMAT_L16A16_FLOAT,
1071                PIPE_FORMAT_R16G16B16A16_FLOAT
1072          };
1073          return find_supported_format(screen, formats, Elements(formats),
1074                target, sample_count, bindings);
1075       }
1076    case GL_INTENSITY32F_ARB:
1077       {
1078          static const enum pipe_format formats[] = {
1079                PIPE_FORMAT_I32_FLOAT,
1080                PIPE_FORMAT_L32A32_FLOAT,
1081                PIPE_FORMAT_R32G32B32A32_FLOAT,
1082                PIPE_FORMAT_I16_FLOAT,
1083                PIPE_FORMAT_L16A16_FLOAT,
1084                PIPE_FORMAT_R16G16B16A16_FLOAT
1085          };
1086          return find_supported_format(screen, formats, Elements(formats),
1087                target, sample_count, bindings);
1088       }
1089    case GL_LUMINANCE32F_ARB:
1090       {
1091          static const enum pipe_format formats[] = {
1092                PIPE_FORMAT_L32_FLOAT,
1093                PIPE_FORMAT_L32A32_FLOAT,
1094                PIPE_FORMAT_R32G32B32A32_FLOAT,
1095                PIPE_FORMAT_L16_FLOAT,
1096                PIPE_FORMAT_L16A16_FLOAT,
1097                PIPE_FORMAT_R16G16B16A16_FLOAT
1098          };
1099          return find_supported_format(screen, formats, Elements(formats),
1100                target, sample_count, bindings);
1101       }
1102    case GL_R32F:
1103       {
1104          static const enum pipe_format formats[] = {
1105                PIPE_FORMAT_R32_FLOAT,
1106                PIPE_FORMAT_R32G32_FLOAT,
1107                PIPE_FORMAT_R32G32B32A32_FLOAT,
1108                PIPE_FORMAT_R16_FLOAT,
1109                PIPE_FORMAT_R16G16_FLOAT,
1110                PIPE_FORMAT_R16G16B16A16_FLOAT
1111          };
1112          return find_supported_format(screen, formats, Elements(formats),
1113                target, sample_count, bindings);
1114       }
1115    case GL_RG32F:
1116       {
1117          static const enum pipe_format formats[] = {
1118                PIPE_FORMAT_R32G32_FLOAT,
1119                PIPE_FORMAT_R32G32B32A32_FLOAT,
1120                PIPE_FORMAT_R16G16_FLOAT,
1121                PIPE_FORMAT_R16G16B16A16_FLOAT
1122          };
1123          return find_supported_format(screen, formats, Elements(formats),
1124                target, sample_count, bindings);
1125       }
1126
1127    case GL_RED:
1128    case GL_R8:
1129       if (screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM, target,
1130                                       sample_count, bindings))
1131               return PIPE_FORMAT_R8_UNORM;
1132       return PIPE_FORMAT_NONE;
1133    case GL_RG:
1134    case GL_RG8:
1135       if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM, target,
1136                                       sample_count, bindings))
1137               return PIPE_FORMAT_R8G8_UNORM;
1138       return PIPE_FORMAT_NONE;
1139
1140    case GL_R16:
1141       if (screen->is_format_supported(screen, PIPE_FORMAT_R16_UNORM, target,
1142                                       sample_count, bindings))
1143               return PIPE_FORMAT_R16_UNORM;
1144       return PIPE_FORMAT_NONE;
1145
1146    case GL_RG16:
1147       if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16_UNORM, target,
1148                                       sample_count, bindings))
1149               return PIPE_FORMAT_R16G16_UNORM;
1150       return PIPE_FORMAT_NONE;
1151
1152    case GL_COMPRESSED_RED:
1153    case GL_COMPRESSED_RED_RGTC1:
1154       if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC1_UNORM, target,
1155                                       sample_count, bindings))
1156               return PIPE_FORMAT_RGTC1_UNORM;
1157       if (screen->is_format_supported(screen, PIPE_FORMAT_R8_UNORM, target,
1158                                       sample_count, bindings))
1159               return PIPE_FORMAT_R8_UNORM;
1160       return PIPE_FORMAT_NONE;
1161
1162    case GL_COMPRESSED_SIGNED_RED_RGTC1:
1163       if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC1_SNORM, target,
1164                                       sample_count, bindings))
1165               return PIPE_FORMAT_RGTC1_SNORM;
1166       return PIPE_FORMAT_NONE;
1167
1168    case GL_COMPRESSED_RG:
1169    case GL_COMPRESSED_RG_RGTC2:
1170       if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC2_UNORM, target,
1171                                       sample_count, bindings))
1172               return PIPE_FORMAT_RGTC2_UNORM;
1173       if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8_UNORM, target,
1174                                       sample_count, bindings))
1175               return PIPE_FORMAT_R8G8_UNORM;
1176       return PIPE_FORMAT_NONE;
1177
1178    case GL_COMPRESSED_SIGNED_RG_RGTC2:
1179       if (screen->is_format_supported(screen, PIPE_FORMAT_RGTC2_SNORM, target,
1180                                       sample_count, bindings))
1181               return PIPE_FORMAT_RGTC2_SNORM;
1182       return PIPE_FORMAT_NONE;
1183
1184    case GL_COMPRESSED_LUMINANCE:
1185    case GL_COMPRESSED_LUMINANCE_LATC1_EXT:
1186       if (screen->is_format_supported(screen, PIPE_FORMAT_LATC1_UNORM, target,
1187                                       sample_count, bindings))
1188               return PIPE_FORMAT_LATC1_UNORM;
1189       if (screen->is_format_supported(screen, PIPE_FORMAT_L8_UNORM, target,
1190                                       sample_count, bindings))
1191               return PIPE_FORMAT_L8_UNORM;
1192       return PIPE_FORMAT_NONE;
1193
1194    case GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT:
1195       if (screen->is_format_supported(screen, PIPE_FORMAT_LATC1_SNORM, target,
1196                                       sample_count, bindings))
1197               return PIPE_FORMAT_LATC1_SNORM;
1198       return PIPE_FORMAT_NONE;
1199
1200    case GL_COMPRESSED_LUMINANCE_ALPHA:
1201    case GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT:
1202    case GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI:
1203       if (screen->is_format_supported(screen, PIPE_FORMAT_LATC2_UNORM, target,
1204                                       sample_count, bindings))
1205               return PIPE_FORMAT_LATC2_UNORM;
1206       if (screen->is_format_supported(screen, PIPE_FORMAT_L8A8_UNORM, target,
1207                                       sample_count, bindings))
1208               return PIPE_FORMAT_L8A8_UNORM;
1209       return PIPE_FORMAT_NONE;
1210
1211    case GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT:
1212       if (screen->is_format_supported(screen, PIPE_FORMAT_LATC2_SNORM, target,
1213                                       sample_count, bindings))
1214               return PIPE_FORMAT_LATC2_SNORM;
1215       return PIPE_FORMAT_NONE;
1216
1217    /* signed/unsigned integer formats.
1218     * XXX Mesa only has formats for RGBA signed/unsigned integer formats.
1219     * If/when new formats are added this code should be updated.
1220     */
1221    case GL_RED_INTEGER_EXT:
1222    case GL_GREEN_INTEGER_EXT:
1223    case GL_BLUE_INTEGER_EXT:
1224    case GL_ALPHA_INTEGER_EXT:
1225    case GL_RGB_INTEGER_EXT:
1226    case GL_RGBA_INTEGER_EXT:
1227    case GL_BGR_INTEGER_EXT:
1228    case GL_BGRA_INTEGER_EXT:
1229    case GL_LUMINANCE_INTEGER_EXT:
1230    case GL_LUMINANCE_ALPHA_INTEGER_EXT:
1231       /* fall-through */
1232    case GL_RGBA8I_EXT:
1233    case GL_RGB8I_EXT:
1234    case GL_ALPHA8I_EXT:
1235    case GL_INTENSITY8I_EXT:
1236    case GL_LUMINANCE8I_EXT:
1237    case GL_LUMINANCE_ALPHA8I_EXT:
1238       if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SSCALED,
1239                                       target,
1240                                       sample_count, bindings))
1241          return PIPE_FORMAT_R8G8B8A8_SSCALED;
1242       return PIPE_FORMAT_NONE;
1243    case GL_RGBA16I_EXT:
1244    case GL_RGB16I_EXT:
1245    case GL_ALPHA16I_EXT:
1246    case GL_INTENSITY16I_EXT:
1247    case GL_LUMINANCE16I_EXT:
1248    case GL_LUMINANCE_ALPHA16I_EXT:
1249       if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_SSCALED,
1250                                       target,
1251                                       sample_count, bindings))
1252          return PIPE_FORMAT_R16G16B16A16_SSCALED;
1253       return PIPE_FORMAT_NONE;
1254    case GL_RGBA32I_EXT:
1255    case GL_RGB32I_EXT:
1256    case GL_ALPHA32I_EXT:
1257    case GL_INTENSITY32I_EXT:
1258    case GL_LUMINANCE32I_EXT:
1259    case GL_LUMINANCE_ALPHA32I_EXT:
1260       /* xxx */
1261       if (screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_SSCALED,
1262                                       target,
1263                                       sample_count, bindings))
1264          return PIPE_FORMAT_R32G32B32A32_SSCALED;
1265       return PIPE_FORMAT_NONE;
1266
1267    case GL_RGBA8UI_EXT:
1268    case GL_RGB8UI_EXT:
1269    case GL_ALPHA8UI_EXT:
1270    case GL_INTENSITY8UI_EXT:
1271    case GL_LUMINANCE8UI_EXT:
1272    case GL_LUMINANCE_ALPHA8UI_EXT:
1273       if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_USCALED,
1274                                       target,
1275                                       sample_count, bindings))
1276          return PIPE_FORMAT_R8G8B8A8_USCALED;
1277       return PIPE_FORMAT_NONE;
1278
1279    case GL_RGBA16UI_EXT:
1280    case GL_RGB16UI_EXT:
1281    case GL_ALPHA16UI_EXT:
1282    case GL_INTENSITY16UI_EXT:
1283    case GL_LUMINANCE16UI_EXT:
1284    case GL_LUMINANCE_ALPHA16UI_EXT:
1285       if (screen->is_format_supported(screen, PIPE_FORMAT_R16G16B16A16_USCALED,
1286                                       target,
1287                                       sample_count, bindings))
1288          return PIPE_FORMAT_R16G16B16A16_USCALED;
1289       return PIPE_FORMAT_NONE;
1290
1291    case GL_RGBA32UI_EXT:
1292    case GL_RGB32UI_EXT:
1293    case GL_ALPHA32UI_EXT:
1294    case GL_INTENSITY32UI_EXT:
1295    case GL_LUMINANCE32UI_EXT:
1296    case GL_LUMINANCE_ALPHA32UI_EXT:
1297       if (screen->is_format_supported(screen, PIPE_FORMAT_R32G32B32A32_USCALED,
1298                                       target,
1299                                       sample_count, bindings))
1300          return PIPE_FORMAT_R32G32B32A32_USCALED;
1301       return PIPE_FORMAT_NONE;
1302
1303    /* signed normalized formats */
1304    case GL_RED_SNORM:
1305    case GL_R8_SNORM:
1306       {
1307          static const enum pipe_format formats[] = {
1308             PIPE_FORMAT_R8_SNORM,
1309             PIPE_FORMAT_R8G8_SNORM,
1310             PIPE_FORMAT_R8G8B8A8_SNORM,
1311          };
1312          return find_supported_format(screen, formats, Elements(formats),
1313                target, sample_count, bindings);
1314       }
1315
1316    case GL_R16_SNORM:
1317       {
1318          static const enum pipe_format formats[] = {
1319             PIPE_FORMAT_R16_SNORM,
1320             PIPE_FORMAT_R16G16_SNORM,
1321             PIPE_FORMAT_R16G16B16A16_SNORM,
1322             PIPE_FORMAT_R8_SNORM,
1323             PIPE_FORMAT_R8G8_SNORM,
1324             PIPE_FORMAT_R8G8B8A8_SNORM,
1325          };
1326          return find_supported_format(screen, formats, Elements(formats),
1327                target, sample_count, bindings);
1328       }
1329
1330    case GL_RG_SNORM:
1331    case GL_RG8_SNORM:
1332       {
1333          static const enum pipe_format formats[] = {
1334             PIPE_FORMAT_R8G8_SNORM,
1335             PIPE_FORMAT_R8G8B8A8_SNORM,
1336          };
1337          return find_supported_format(screen, formats, Elements(formats),
1338                target, sample_count, bindings);
1339       }
1340
1341    case GL_RG16_SNORM:
1342       {
1343          static const enum pipe_format formats[] = {
1344             PIPE_FORMAT_R16G16_SNORM,
1345             PIPE_FORMAT_R16G16B16A16_SNORM,
1346             PIPE_FORMAT_R8G8_SNORM,
1347             PIPE_FORMAT_R8G8B8A8_SNORM,
1348          };
1349          return find_supported_format(screen, formats, Elements(formats),
1350                target, sample_count, bindings);
1351       }
1352
1353    case GL_RGB_SNORM:
1354    case GL_RGB8_SNORM:
1355    case GL_RGBA_SNORM:
1356    case GL_RGBA8_SNORM:
1357       if (screen->is_format_supported(screen, PIPE_FORMAT_R8G8B8A8_SNORM,
1358                                       target,
1359                                       sample_count, bindings))
1360          return PIPE_FORMAT_R8G8B8A8_SNORM;
1361       return PIPE_FORMAT_NONE;
1362
1363    case GL_RGB16_SNORM:
1364    case GL_RGBA16_SNORM:
1365       {
1366          static const enum pipe_format formats[] = {
1367             PIPE_FORMAT_R16G16B16A16_SNORM,
1368             PIPE_FORMAT_R8G8B8A8_SNORM,
1369          };
1370          return find_supported_format(screen, formats, Elements(formats),
1371                target, sample_count, bindings);
1372       }
1373
1374
1375    case GL_ALPHA_SNORM:
1376    case GL_ALPHA8_SNORM:
1377       {
1378          static const enum pipe_format formats[] = {
1379             PIPE_FORMAT_A8_SNORM,
1380             PIPE_FORMAT_R8G8B8A8_SNORM,
1381          };
1382          return find_supported_format(screen, formats, Elements(formats),
1383                target, sample_count, bindings);
1384       }
1385
1386    case GL_ALPHA16_SNORM:
1387       {
1388          static const enum pipe_format formats[] = {
1389             PIPE_FORMAT_A16_SNORM,
1390             PIPE_FORMAT_R16G16B16A16_SNORM,
1391             PIPE_FORMAT_A8_SNORM,
1392             PIPE_FORMAT_R8G8B8A8_SNORM,
1393          };
1394          return find_supported_format(screen, formats, Elements(formats),
1395                target, sample_count, bindings);
1396       }
1397
1398    case GL_LUMINANCE_SNORM:
1399    case GL_LUMINANCE8_SNORM:
1400       {
1401          static const enum pipe_format formats[] = {
1402             PIPE_FORMAT_L8_SNORM,
1403             PIPE_FORMAT_R8G8B8A8_SNORM,
1404          };
1405          return find_supported_format(screen, formats, Elements(formats),
1406                target, sample_count, bindings);
1407       }
1408
1409    case GL_LUMINANCE16_SNORM:
1410       {
1411          static const enum pipe_format formats[] = {
1412             PIPE_FORMAT_L16_SNORM,
1413             PIPE_FORMAT_R16G16B16A16_SNORM,
1414             PIPE_FORMAT_L8_SNORM,
1415             PIPE_FORMAT_R8G8B8A8_SNORM,
1416          };
1417          return find_supported_format(screen, formats, Elements(formats),
1418                target, sample_count, bindings);
1419       }
1420
1421    case GL_LUMINANCE_ALPHA_SNORM:
1422    case GL_LUMINANCE8_ALPHA8_SNORM:
1423       {
1424          static const enum pipe_format formats[] = {
1425             PIPE_FORMAT_L8A8_SNORM,
1426             PIPE_FORMAT_R8G8B8A8_SNORM,
1427          };
1428          return find_supported_format(screen, formats, Elements(formats),
1429                target, sample_count, bindings);
1430       }
1431
1432    case GL_LUMINANCE16_ALPHA16_SNORM:
1433       {
1434          static const enum pipe_format formats[] = {
1435             PIPE_FORMAT_L16A16_SNORM,
1436             PIPE_FORMAT_R16G16B16A16_SNORM,
1437             PIPE_FORMAT_L8A8_SNORM,
1438             PIPE_FORMAT_R8G8B8A8_SNORM,
1439          };
1440          return find_supported_format(screen, formats, Elements(formats),
1441                target, sample_count, bindings);
1442       }
1443
1444    case GL_INTENSITY_SNORM:
1445    case GL_INTENSITY8_SNORM:
1446       {
1447          static const enum pipe_format formats[] = {
1448             PIPE_FORMAT_I8_SNORM,
1449             PIPE_FORMAT_R8G8B8A8_SNORM,
1450          };
1451          return find_supported_format(screen, formats, Elements(formats),
1452                target, sample_count, bindings);
1453       }
1454
1455    case GL_INTENSITY16_SNORM:
1456       {
1457          static const enum pipe_format formats[] = {
1458             PIPE_FORMAT_I16_SNORM,
1459             PIPE_FORMAT_R16G16B16A16_SNORM,
1460             PIPE_FORMAT_I8_SNORM,
1461             PIPE_FORMAT_R8G8B8A8_SNORM,
1462          };
1463          return find_supported_format(screen, formats, Elements(formats),
1464                target, sample_count, bindings);
1465       }
1466
1467    default:
1468       return PIPE_FORMAT_NONE;
1469    }
1470 }
1471
1472
1473 /**
1474  * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
1475  */
1476 enum pipe_format
1477 st_choose_renderbuffer_format(struct pipe_screen *screen,
1478                               GLenum internalFormat, unsigned sample_count)
1479 {
1480    uint usage;
1481    if (_mesa_is_depth_or_stencil_format(internalFormat))
1482       usage = PIPE_BIND_DEPTH_STENCIL;
1483    else
1484       usage = PIPE_BIND_RENDER_TARGET;
1485    return st_choose_format(screen, internalFormat, PIPE_TEXTURE_2D,
1486                            sample_count, usage);
1487 }
1488
1489
1490 /**
1491  * Called via ctx->Driver.chooseTextureFormat().
1492  */
1493 gl_format
1494 st_ChooseTextureFormat_renderable(struct gl_context *ctx, GLint internalFormat,
1495                                   GLenum format, GLenum type, GLboolean renderable)
1496 {
1497    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
1498    enum pipe_format pFormat;
1499    uint bindings;
1500
1501    (void) format;
1502    (void) type;
1503
1504    /* GL textures may wind up being render targets, but we don't know
1505     * that in advance.  Specify potential render target flags now.
1506     */
1507    bindings = PIPE_BIND_SAMPLER_VIEW;
1508    if (renderable == GL_TRUE) {
1509       if (_mesa_is_depth_format(internalFormat) ||
1510           _mesa_is_depth_or_stencil_format(internalFormat))
1511          bindings |= PIPE_BIND_DEPTH_STENCIL;
1512       else
1513          bindings |= PIPE_BIND_RENDER_TARGET;
1514    }
1515
1516    pFormat = st_choose_format(screen, internalFormat,
1517                               PIPE_TEXTURE_2D, 0, bindings);
1518
1519    if (pFormat == PIPE_FORMAT_NONE) {
1520       /* try choosing format again, this time without render target bindings */
1521       pFormat = st_choose_format(screen, internalFormat,
1522                                  PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
1523    }
1524
1525    if (pFormat == PIPE_FORMAT_NONE) {
1526       /* no luck at all */
1527       return MESA_FORMAT_NONE;
1528    }
1529
1530    return st_pipe_format_to_mesa_format(pFormat);
1531 }
1532
1533 gl_format
1534 st_ChooseTextureFormat(struct gl_context *ctx, GLint internalFormat,
1535                        GLenum format, GLenum type)
1536 {
1537    boolean want_renderable =
1538       internalFormat == 3 || internalFormat == 4 ||
1539       internalFormat == GL_RGB || internalFormat == GL_RGBA ||
1540       internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||
1541       internalFormat == GL_BGRA;
1542
1543    return st_ChooseTextureFormat_renderable(ctx, internalFormat,
1544                                             format, type, want_renderable);
1545 }
1546
1547 /**
1548  * Test if a gallium format is equivalent to a GL format/type.
1549  */
1550 GLboolean
1551 st_equal_formats(enum pipe_format pFormat, GLenum format, GLenum type)
1552 {
1553    switch (pFormat) {
1554    case PIPE_FORMAT_A8B8G8R8_UNORM:
1555       return format == GL_RGBA && type == GL_UNSIGNED_BYTE;
1556    case PIPE_FORMAT_A8R8G8B8_UNORM:
1557       return format == GL_BGRA && type == GL_UNSIGNED_BYTE;
1558    case PIPE_FORMAT_B5G6R5_UNORM:
1559       return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5;
1560    /* XXX more combos... */
1561    default:
1562       return GL_FALSE;
1563    }
1564 }
1565
1566 GLboolean
1567 st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
1568 {
1569    if (format1 == format2)
1570       return GL_TRUE;
1571
1572    if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&
1573        format2 == PIPE_FORMAT_B8G8R8X8_UNORM)
1574       return GL_TRUE;
1575
1576    if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&
1577        format2 == PIPE_FORMAT_B8G8R8A8_UNORM)
1578       return GL_TRUE;
1579
1580    if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&
1581        format2 == PIPE_FORMAT_X8B8G8R8_UNORM)
1582       return GL_TRUE;
1583
1584    if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&
1585        format2 == PIPE_FORMAT_A8B8G8R8_UNORM)
1586       return GL_TRUE;
1587
1588    if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&
1589        format2 == PIPE_FORMAT_X8R8G8B8_UNORM)
1590       return GL_TRUE;
1591
1592    if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&
1593        format2 == PIPE_FORMAT_A8R8G8B8_UNORM)
1594       return GL_TRUE;
1595
1596    return GL_FALSE;
1597 }
1598
1599
1600
1601 /**
1602  * This is used for translating texture border color and the clear
1603  * color.  For example, the clear color is interpreted according to
1604  * the renderbuffer's base format.  For example, if clearing a
1605  * GL_LUMINANCE buffer, ClearColor[0] = luminance and ClearColor[1] =
1606  * alpha.  Similarly for texture border colors.
1607  */
1608 void
1609 st_translate_color(const GLfloat colorIn[4], GLenum baseFormat,
1610                    GLfloat colorOut[4])
1611 {
1612    switch (baseFormat) {
1613    case GL_RED:
1614       colorOut[0] = colorIn[0];
1615       colorOut[1] = 0.0F;
1616       colorOut[2] = 0.0F;
1617       colorOut[3] = 1.0F;
1618       break;
1619    case GL_RG:
1620       colorOut[0] = colorIn[0];
1621       colorOut[1] = colorIn[1];
1622       colorOut[2] = 0.0F;
1623       colorOut[3] = 1.0F;
1624       break;
1625    case GL_RGB:
1626       colorOut[0] = colorIn[0];
1627       colorOut[1] = colorIn[1];
1628       colorOut[2] = colorIn[2];
1629       colorOut[3] = 1.0F;
1630       break;
1631    case GL_ALPHA:
1632       colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
1633       colorOut[3] = colorIn[3];
1634       break;
1635    case GL_LUMINANCE:
1636       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
1637       colorOut[3] = 1.0;
1638       break;
1639    case GL_LUMINANCE_ALPHA:
1640       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
1641       colorOut[3] = colorIn[3];
1642       break;
1643    case GL_INTENSITY:
1644       colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
1645       break;
1646    default:
1647       COPY_4V(colorOut, colorIn);
1648    }
1649 }