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/glformats.h"
  38 #include "main/texstore.h"
  39 #include "main/image.h"
  40 #include "main/macros.h"
  41 #include "main/mfeatures.h"
  42
  43 #include "pipe/p_context.h"
  44 #include "pipe/p_defines.h"
  45 #include "pipe/p_screen.h"
  46 #include "util/u_format.h"
  47 #include "st_context.h"
  48 #include "st_format.h"
  49
  50
  51 /**
  52  * Translate Mesa format to Gallium format.
  53  */
  54 enum pipe_format
  55 st_mesa_format_to_pipe_format(gl_format mesaFormat)
  56 {
  57    switch (mesaFormat) {
  58    case MESA_FORMAT_RGBA8888:
  59       return PIPE_FORMAT_A8B8G8R8_UNORM;
  60    case MESA_FORMAT_RGBA8888_REV:
  61       return PIPE_FORMAT_R8G8B8A8_UNORM;
  62    case MESA_FORMAT_ARGB8888:
  63       return PIPE_FORMAT_B8G8R8A8_UNORM;
  64    case MESA_FORMAT_ARGB8888_REV:
  65       return PIPE_FORMAT_A8R8G8B8_UNORM;
  66    case MESA_FORMAT_RGBX8888:
  67       return PIPE_FORMAT_X8B8G8R8_UNORM;
  68    case MESA_FORMAT_RGBX8888_REV:
  69       return PIPE_FORMAT_R8G8B8X8_UNORM;
  70    case MESA_FORMAT_XRGB8888:
  71       return PIPE_FORMAT_B8G8R8X8_UNORM;
  72    case MESA_FORMAT_XRGB8888_REV:
  73       return PIPE_FORMAT_X8R8G8B8_UNORM;
  74    case MESA_FORMAT_ARGB1555:
  75       return PIPE_FORMAT_B5G5R5A1_UNORM;
  76    case MESA_FORMAT_ARGB4444:
  77       return PIPE_FORMAT_B4G4R4A4_UNORM;
  78    case MESA_FORMAT_RGB565:
  79       return PIPE_FORMAT_B5G6R5_UNORM;
  80    case MESA_FORMAT_RGB332:
  81       return PIPE_FORMAT_B2G3R3_UNORM;
  82    case MESA_FORMAT_ARGB2101010:
  83       return PIPE_FORMAT_B10G10R10A2_UNORM;
  84    case MESA_FORMAT_AL44:
  85       return PIPE_FORMAT_L4A4_UNORM;
  86    case MESA_FORMAT_AL88:
  87       return PIPE_FORMAT_L8A8_UNORM;
  88    case MESA_FORMAT_AL1616:
  89       return PIPE_FORMAT_L16A16_UNORM;
  90    case MESA_FORMAT_A8:
  91       return PIPE_FORMAT_A8_UNORM;
  92    case MESA_FORMAT_A16:
  93       return PIPE_FORMAT_A16_UNORM;
  94    case MESA_FORMAT_L8:
  95       return PIPE_FORMAT_L8_UNORM;
  96    case MESA_FORMAT_L16:
  97       return PIPE_FORMAT_L16_UNORM;
  98    case MESA_FORMAT_I8:
  99       return PIPE_FORMAT_I8_UNORM;
 100    case MESA_FORMAT_I16:
 101       return PIPE_FORMAT_I16_UNORM;
 102    case MESA_FORMAT_Z16:
 103       return PIPE_FORMAT_Z16_UNORM;
 104    case MESA_FORMAT_Z32:
 105       return PIPE_FORMAT_Z32_UNORM;
 106    case MESA_FORMAT_Z24_S8:
 107       return PIPE_FORMAT_S8_UINT_Z24_UNORM;
 108    case MESA_FORMAT_S8_Z24:
 109       return PIPE_FORMAT_Z24_UNORM_S8_UINT;
 110    case MESA_FORMAT_Z24_X8:
 111       return PIPE_FORMAT_X8Z24_UNORM;
 112    case MESA_FORMAT_X8_Z24:
 113       return PIPE_FORMAT_Z24X8_UNORM;
 114    case MESA_FORMAT_S8:
 115       return PIPE_FORMAT_S8_UINT;
 116    case MESA_FORMAT_Z32_FLOAT:
 117       return PIPE_FORMAT_Z32_FLOAT;
 118    case MESA_FORMAT_Z32_FLOAT_X24S8:
 119       return PIPE_FORMAT_Z32_FLOAT_S8X24_UINT;
 120    case MESA_FORMAT_YCBCR:
 121       return PIPE_FORMAT_UYVY;
 122    case MESA_FORMAT_RGB_DXT1:
 123       return PIPE_FORMAT_DXT1_RGB;
 124    case MESA_FORMAT_RGBA_DXT1:
 125       return PIPE_FORMAT_DXT1_RGBA;
 126    case MESA_FORMAT_RGBA_DXT3:
 127       return PIPE_FORMAT_DXT3_RGBA;
 128    case MESA_FORMAT_RGBA_DXT5:
 129       return PIPE_FORMAT_DXT5_RGBA;
 130    case MESA_FORMAT_SRGB_DXT1:
 131       return PIPE_FORMAT_DXT1_SRGB;
 132    case MESA_FORMAT_SRGBA_DXT1:
 133       return PIPE_FORMAT_DXT1_SRGBA;
 134    case MESA_FORMAT_SRGBA_DXT3:
 135       return PIPE_FORMAT_DXT3_SRGBA;
 136    case MESA_FORMAT_SRGBA_DXT5:
 137       return PIPE_FORMAT_DXT5_SRGBA;
 138    case MESA_FORMAT_SLA8:
 139       return PIPE_FORMAT_L8A8_SRGB;
 140    case MESA_FORMAT_SL8:
 141       return PIPE_FORMAT_L8_SRGB;
 142    case MESA_FORMAT_SRGB8:
 143       return PIPE_FORMAT_R8G8B8_SRGB;
 144    case MESA_FORMAT_SRGBA8:
 145       return PIPE_FORMAT_A8B8G8R8_SRGB;
 146    case MESA_FORMAT_SARGB8:
 147       return PIPE_FORMAT_B8G8R8A8_SRGB;
 148    case MESA_FORMAT_RGBA_FLOAT32:
 149       return PIPE_FORMAT_R32G32B32A32_FLOAT;
 150    case MESA_FORMAT_RGBA_FLOAT16:
 151       return PIPE_FORMAT_R16G16B16A16_FLOAT;
 152    case MESA_FORMAT_RGB_FLOAT32:
 153       return PIPE_FORMAT_R32G32B32_FLOAT;
 154    case MESA_FORMAT_RGB_FLOAT16:
 155       return PIPE_FORMAT_R16G16B16_FLOAT;
 156    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32:
 157       return PIPE_FORMAT_L32A32_FLOAT;
 158    case MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16:
 159       return PIPE_FORMAT_L16A16_FLOAT;
 160    case MESA_FORMAT_LUMINANCE_FLOAT32:
 161       return PIPE_FORMAT_L32_FLOAT;
 162    case MESA_FORMAT_LUMINANCE_FLOAT16:
 163       return PIPE_FORMAT_L16_FLOAT;
 164    case MESA_FORMAT_ALPHA_FLOAT32:
 165       return PIPE_FORMAT_A32_FLOAT;
 166    case MESA_FORMAT_ALPHA_FLOAT16:
 167       return PIPE_FORMAT_A16_FLOAT;
 168    case MESA_FORMAT_INTENSITY_FLOAT32:
 169       return PIPE_FORMAT_I32_FLOAT;
 170    case MESA_FORMAT_INTENSITY_FLOAT16:
 171       return PIPE_FORMAT_I16_FLOAT;
 172    case MESA_FORMAT_R_FLOAT32:
 173       return PIPE_FORMAT_R32_FLOAT;
 174    case MESA_FORMAT_R_FLOAT16:
 175       return PIPE_FORMAT_R16_FLOAT;
 176    case MESA_FORMAT_RG_FLOAT32:
 177       return PIPE_FORMAT_R32G32_FLOAT;
 178    case MESA_FORMAT_RG_FLOAT16:
 179       return PIPE_FORMAT_R16G16_FLOAT;
 180
 181    case MESA_FORMAT_R8:
 182       return PIPE_FORMAT_R8_UNORM;
 183    case MESA_FORMAT_R16:
 184       return PIPE_FORMAT_R16_UNORM;
 185    case MESA_FORMAT_GR88:
 186       return PIPE_FORMAT_R8G8_UNORM;
 187    case MESA_FORMAT_GR1616:
 188       return PIPE_FORMAT_R16G16_UNORM;
 189    case MESA_FORMAT_RGBA_16:
 190       return PIPE_FORMAT_R16G16B16A16_UNORM;
 191
 192    /* signed int formats */
 193    case MESA_FORMAT_ALPHA_UINT8:
 194       return PIPE_FORMAT_A8_UINT;
 195    case MESA_FORMAT_ALPHA_UINT16:
 196       return PIPE_FORMAT_A16_UINT;
 197    case MESA_FORMAT_ALPHA_UINT32:
 198       return PIPE_FORMAT_A32_UINT;
 199
 200    case MESA_FORMAT_ALPHA_INT8:
 201       return PIPE_FORMAT_A8_SINT;
 202    case MESA_FORMAT_ALPHA_INT16:
 203       return PIPE_FORMAT_A16_SINT;
 204    case MESA_FORMAT_ALPHA_INT32:
 205       return PIPE_FORMAT_A32_SINT;
 206
 207    case MESA_FORMAT_INTENSITY_UINT8:
 208       return PIPE_FORMAT_I8_UINT;
 209    case MESA_FORMAT_INTENSITY_UINT16:
 210       return PIPE_FORMAT_I16_UINT;
 211    case MESA_FORMAT_INTENSITY_UINT32:
 212       return PIPE_FORMAT_I32_UINT;
 213
 214    case MESA_FORMAT_INTENSITY_INT8:
 215       return PIPE_FORMAT_I8_SINT;
 216    case MESA_FORMAT_INTENSITY_INT16:
 217       return PIPE_FORMAT_I16_SINT;
 218    case MESA_FORMAT_INTENSITY_INT32:
 219       return PIPE_FORMAT_I32_SINT;
 220
 221    case MESA_FORMAT_LUMINANCE_UINT8:
 222       return PIPE_FORMAT_L8_UINT;
 223    case MESA_FORMAT_LUMINANCE_UINT16:
 224       return PIPE_FORMAT_L16_UINT;
 225    case MESA_FORMAT_LUMINANCE_UINT32:
 226       return PIPE_FORMAT_L32_UINT;
 227
 228    case MESA_FORMAT_LUMINANCE_INT8:
 229       return PIPE_FORMAT_L8_SINT;
 230    case MESA_FORMAT_LUMINANCE_INT16:
 231       return PIPE_FORMAT_L16_SINT;
 232    case MESA_FORMAT_LUMINANCE_INT32:
 233       return PIPE_FORMAT_L32_SINT;
 234
 235    case MESA_FORMAT_LUMINANCE_ALPHA_UINT8:
 236       return PIPE_FORMAT_L8A8_UINT;
 237    case MESA_FORMAT_LUMINANCE_ALPHA_UINT16:
 238       return PIPE_FORMAT_L16A16_UINT;
 239    case MESA_FORMAT_LUMINANCE_ALPHA_UINT32:
 240       return PIPE_FORMAT_L32A32_UINT;
 241
 242    case MESA_FORMAT_LUMINANCE_ALPHA_INT8:
 243       return PIPE_FORMAT_L8A8_SINT;
 244    case MESA_FORMAT_LUMINANCE_ALPHA_INT16:
 245       return PIPE_FORMAT_L16A16_SINT;
 246    case MESA_FORMAT_LUMINANCE_ALPHA_INT32:
 247       return PIPE_FORMAT_L32A32_SINT;
 248
 249    case MESA_FORMAT_R_INT8:
 250       return PIPE_FORMAT_R8_SINT;
 251    case MESA_FORMAT_RG_INT8:
 252       return PIPE_FORMAT_R8G8_SINT;
 253    case MESA_FORMAT_RGB_INT8:
 254       return PIPE_FORMAT_R8G8B8_SINT;
 255    case MESA_FORMAT_RGBA_INT8:
 256       return PIPE_FORMAT_R8G8B8A8_SINT;
 257    case MESA_FORMAT_R_INT16:
 258       return PIPE_FORMAT_R16_SINT;
 259    case MESA_FORMAT_RG_INT16:
 260       return PIPE_FORMAT_R16G16_SINT;
 261    case MESA_FORMAT_RGB_INT16:
 262       return PIPE_FORMAT_R16G16B16_SINT;
 263    case MESA_FORMAT_RGBA_INT16:
 264       return PIPE_FORMAT_R16G16B16A16_SINT;
 265    case MESA_FORMAT_R_INT32:
 266       return PIPE_FORMAT_R32_SINT;
 267    case MESA_FORMAT_RG_INT32:
 268       return PIPE_FORMAT_R32G32_SINT;
 269    case MESA_FORMAT_RGB_INT32:
 270       return PIPE_FORMAT_R32G32B32_SINT;
 271    case MESA_FORMAT_RGBA_INT32:
 272       return PIPE_FORMAT_R32G32B32A32_SINT;
 273
 274    /* unsigned int formats */
 275    case MESA_FORMAT_R_UINT8:
 276       return PIPE_FORMAT_R8_UINT;
 277    case MESA_FORMAT_RG_UINT8:
 278       return PIPE_FORMAT_R8G8_UINT;
 279    case MESA_FORMAT_RGB_UINT8:
 280       return PIPE_FORMAT_R8G8B8_UINT;
 281    case MESA_FORMAT_RGBA_UINT8:
 282       return PIPE_FORMAT_R8G8B8A8_UINT;
 283    case MESA_FORMAT_R_UINT16:
 284       return PIPE_FORMAT_R16_UINT;
 285    case MESA_FORMAT_RG_UINT16:
 286       return PIPE_FORMAT_R16G16_UINT;
 287    case MESA_FORMAT_RGB_UINT16:
 288       return PIPE_FORMAT_R16G16B16_UINT;
 289    case MESA_FORMAT_RGBA_UINT16:
 290       return PIPE_FORMAT_R16G16B16A16_UINT;
 291    case MESA_FORMAT_R_UINT32:
 292       return PIPE_FORMAT_R32_UINT;
 293    case MESA_FORMAT_RG_UINT32:
 294       return PIPE_FORMAT_R32G32_UINT;
 295    case MESA_FORMAT_RGB_UINT32:
 296       return PIPE_FORMAT_R32G32B32_UINT;
 297    case MESA_FORMAT_RGBA_UINT32:
 298       return PIPE_FORMAT_R32G32B32A32_UINT;
 299
 300    case MESA_FORMAT_RED_RGTC1:
 301       return PIPE_FORMAT_RGTC1_UNORM;
 302    case MESA_FORMAT_SIGNED_RED_RGTC1:
 303       return PIPE_FORMAT_RGTC1_SNORM;
 304    case MESA_FORMAT_RG_RGTC2:
 305       return PIPE_FORMAT_RGTC2_UNORM;
 306    case MESA_FORMAT_SIGNED_RG_RGTC2:
 307       return PIPE_FORMAT_RGTC2_SNORM;
 308
 309    case MESA_FORMAT_L_LATC1:
 310       return PIPE_FORMAT_LATC1_UNORM;
 311    case MESA_FORMAT_SIGNED_L_LATC1:
 312       return PIPE_FORMAT_LATC1_SNORM;
 313    case MESA_FORMAT_LA_LATC2:
 314       return PIPE_FORMAT_LATC2_UNORM;
 315    case MESA_FORMAT_SIGNED_LA_LATC2:
 316       return PIPE_FORMAT_LATC2_SNORM;
 317
 318    case MESA_FORMAT_ETC1_RGB8:
 319       return PIPE_FORMAT_ETC1_RGB8;
 320
 321    /* signed normalized formats */
 322    case MESA_FORMAT_SIGNED_R8:
 323       return PIPE_FORMAT_R8_SNORM;
 324    case MESA_FORMAT_SIGNED_RG88_REV:
 325       return PIPE_FORMAT_R8G8_SNORM;
 326    case MESA_FORMAT_SIGNED_RGBA8888_REV:
 327       return PIPE_FORMAT_R8G8B8A8_SNORM;
 328
 329    case MESA_FORMAT_SIGNED_A8:
 330       return PIPE_FORMAT_A8_SNORM;
 331    case MESA_FORMAT_SIGNED_L8:
 332       return PIPE_FORMAT_L8_SNORM;
 333    case MESA_FORMAT_SIGNED_AL88:
 334       return PIPE_FORMAT_L8A8_SNORM;
 335    case MESA_FORMAT_SIGNED_I8:
 336       return PIPE_FORMAT_I8_SNORM;
 337
 338    case MESA_FORMAT_SIGNED_R16:
 339       return PIPE_FORMAT_R16_SNORM;
 340    case MESA_FORMAT_SIGNED_GR1616:
 341       return PIPE_FORMAT_R16G16_SNORM;
 342    case MESA_FORMAT_SIGNED_RGBA_16:
 343       return PIPE_FORMAT_R16G16B16A16_SNORM;
 344
 345    case MESA_FORMAT_SIGNED_A16:
 346       return PIPE_FORMAT_A16_SNORM;
 347    case MESA_FORMAT_SIGNED_L16:
 348       return PIPE_FORMAT_L16_SNORM;
 349    case MESA_FORMAT_SIGNED_AL1616:
 350       return PIPE_FORMAT_L16A16_SNORM;
 351    case MESA_FORMAT_SIGNED_I16:
 352       return PIPE_FORMAT_I16_SNORM;
 353
 354    case MESA_FORMAT_RGB9_E5_FLOAT:
 355       return PIPE_FORMAT_R9G9B9E5_FLOAT;
 356    case MESA_FORMAT_R11_G11_B10_FLOAT:
 357       return PIPE_FORMAT_R11G11B10_FLOAT;
 358    case MESA_FORMAT_ARGB2101010_UINT:
 359       return PIPE_FORMAT_B10G10R10A2_UINT;
 360    default:
 361       assert(0);
 362       return PIPE_FORMAT_NONE;
 363    }
 364 }
 365
 366
 367 /**
 368  * Translate Gallium format to Mesa format.
 369  */
 370 gl_format
 371 st_pipe_format_to_mesa_format(enum pipe_format format)
 372 {
 373    switch (format) {
 374    case PIPE_FORMAT_A8B8G8R8_UNORM:
 375       return MESA_FORMAT_RGBA8888;
 376    case PIPE_FORMAT_R8G8B8A8_UNORM:
 377       return MESA_FORMAT_RGBA8888_REV;
 378    case PIPE_FORMAT_B8G8R8A8_UNORM:
 379       return MESA_FORMAT_ARGB8888;
 380    case PIPE_FORMAT_A8R8G8B8_UNORM:
 381       return MESA_FORMAT_ARGB8888_REV;
 382    case PIPE_FORMAT_X8B8G8R8_UNORM:
 383       return MESA_FORMAT_RGBX8888;
 384    case PIPE_FORMAT_R8G8B8X8_UNORM:
 385       return MESA_FORMAT_RGBX8888_REV;
 386    case PIPE_FORMAT_B8G8R8X8_UNORM:
 387       return MESA_FORMAT_XRGB8888;
 388    case PIPE_FORMAT_X8R8G8B8_UNORM:
 389       return MESA_FORMAT_XRGB8888_REV;
 390    case PIPE_FORMAT_B5G5R5A1_UNORM:
 391       return MESA_FORMAT_ARGB1555;
 392    case PIPE_FORMAT_B4G4R4A4_UNORM:
 393       return MESA_FORMAT_ARGB4444;
 394    case PIPE_FORMAT_B5G6R5_UNORM:
 395       return MESA_FORMAT_RGB565;
 396    case PIPE_FORMAT_B2G3R3_UNORM:
 397       return MESA_FORMAT_RGB332;
 398    case PIPE_FORMAT_B10G10R10A2_UNORM:
 399       return MESA_FORMAT_ARGB2101010;
 400    case PIPE_FORMAT_L4A4_UNORM:
 401       return MESA_FORMAT_AL44;
 402    case PIPE_FORMAT_L8A8_UNORM:
 403       return MESA_FORMAT_AL88;
 404    case PIPE_FORMAT_L16A16_UNORM:
 405       return MESA_FORMAT_AL1616;
 406    case PIPE_FORMAT_A8_UNORM:
 407       return MESA_FORMAT_A8;
 408    case PIPE_FORMAT_A16_UNORM:
 409       return MESA_FORMAT_A16;
 410    case PIPE_FORMAT_L8_UNORM:
 411       return MESA_FORMAT_L8;
 412    case PIPE_FORMAT_L16_UNORM:
 413       return MESA_FORMAT_L16;
 414    case PIPE_FORMAT_I8_UNORM:
 415       return MESA_FORMAT_I8;
 416    case PIPE_FORMAT_I16_UNORM:
 417       return MESA_FORMAT_I16;
 418    case PIPE_FORMAT_S8_UINT:
 419       return MESA_FORMAT_S8;
 420
 421    case PIPE_FORMAT_R16G16B16A16_UNORM:
 422       return MESA_FORMAT_RGBA_16;
 423
 424    case PIPE_FORMAT_Z16_UNORM:
 425       return MESA_FORMAT_Z16;
 426    case PIPE_FORMAT_Z32_UNORM:
 427       return MESA_FORMAT_Z32;
 428    case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 429       return MESA_FORMAT_Z24_S8;
 430    case PIPE_FORMAT_X8Z24_UNORM:
 431       return MESA_FORMAT_Z24_X8;
 432    case PIPE_FORMAT_Z24X8_UNORM:
 433       return MESA_FORMAT_X8_Z24;
 434    case PIPE_FORMAT_Z24_UNORM_S8_UINT:
 435       return MESA_FORMAT_S8_Z24;
 436    case PIPE_FORMAT_Z32_FLOAT:
 437       return MESA_FORMAT_Z32_FLOAT;
 438    case PIPE_FORMAT_Z32_FLOAT_S8X24_UINT:
 439       return MESA_FORMAT_Z32_FLOAT_X24S8;
 440
 441    case PIPE_FORMAT_UYVY:
 442       return MESA_FORMAT_YCBCR;
 443    case PIPE_FORMAT_YUYV:
 444       return MESA_FORMAT_YCBCR_REV;
 445
 446    case PIPE_FORMAT_DXT1_RGB:
 447       return MESA_FORMAT_RGB_DXT1;
 448    case PIPE_FORMAT_DXT1_RGBA:
 449       return MESA_FORMAT_RGBA_DXT1;
 450    case PIPE_FORMAT_DXT3_RGBA:
 451       return MESA_FORMAT_RGBA_DXT3;
 452    case PIPE_FORMAT_DXT5_RGBA:
 453       return MESA_FORMAT_RGBA_DXT5;
 454    case PIPE_FORMAT_DXT1_SRGB:
 455       return MESA_FORMAT_SRGB_DXT1;
 456    case PIPE_FORMAT_DXT1_SRGBA:
 457       return MESA_FORMAT_SRGBA_DXT1;
 458    case PIPE_FORMAT_DXT3_SRGBA:
 459       return MESA_FORMAT_SRGBA_DXT3;
 460    case PIPE_FORMAT_DXT5_SRGBA:
 461       return MESA_FORMAT_SRGBA_DXT5;
 462    case PIPE_FORMAT_L8A8_SRGB:
 463       return MESA_FORMAT_SLA8;
 464    case PIPE_FORMAT_L8_SRGB:
 465       return MESA_FORMAT_SL8;
 466    case PIPE_FORMAT_R8G8B8_SRGB:
 467       return MESA_FORMAT_SRGB8;
 468    case PIPE_FORMAT_A8B8G8R8_SRGB:
 469       return MESA_FORMAT_SRGBA8;
 470    case PIPE_FORMAT_B8G8R8A8_SRGB:
 471       return MESA_FORMAT_SARGB8;
 472    case PIPE_FORMAT_R32G32B32A32_FLOAT:
 473       return MESA_FORMAT_RGBA_FLOAT32;
 474    case PIPE_FORMAT_R16G16B16A16_FLOAT:
 475       return MESA_FORMAT_RGBA_FLOAT16;
 476    case PIPE_FORMAT_R32G32B32_FLOAT:
 477       return MESA_FORMAT_RGB_FLOAT32;
 478    case PIPE_FORMAT_R16G16B16_FLOAT:
 479       return MESA_FORMAT_RGB_FLOAT16;
 480    case PIPE_FORMAT_L32A32_FLOAT:
 481       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
 482    case PIPE_FORMAT_L16A16_FLOAT:
 483       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
 484    case PIPE_FORMAT_L32_FLOAT:
 485       return MESA_FORMAT_LUMINANCE_FLOAT32;
 486    case PIPE_FORMAT_L16_FLOAT:
 487       return MESA_FORMAT_LUMINANCE_FLOAT16;
 488    case PIPE_FORMAT_A32_FLOAT:
 489       return MESA_FORMAT_ALPHA_FLOAT32;
 490    case PIPE_FORMAT_A16_FLOAT:
 491       return MESA_FORMAT_ALPHA_FLOAT16;
 492    case PIPE_FORMAT_I32_FLOAT:
 493       return MESA_FORMAT_INTENSITY_FLOAT32;
 494    case PIPE_FORMAT_I16_FLOAT:
 495       return MESA_FORMAT_INTENSITY_FLOAT16;
 496    case PIPE_FORMAT_R32_FLOAT:
 497       return MESA_FORMAT_R_FLOAT32;
 498    case PIPE_FORMAT_R16_FLOAT:
 499       return MESA_FORMAT_R_FLOAT16;
 500    case PIPE_FORMAT_R32G32_FLOAT:
 501       return MESA_FORMAT_RG_FLOAT32;
 502    case PIPE_FORMAT_R16G16_FLOAT:
 503       return MESA_FORMAT_RG_FLOAT16;
 504
 505    case PIPE_FORMAT_R8_UNORM:
 506       return MESA_FORMAT_R8;
 507    case PIPE_FORMAT_R16_UNORM:
 508       return MESA_FORMAT_R16;
 509    case PIPE_FORMAT_R8G8_UNORM:
 510       return MESA_FORMAT_GR88;
 511    case PIPE_FORMAT_R16G16_UNORM:
 512       return MESA_FORMAT_GR1616;
 513
 514    case PIPE_FORMAT_A8_UINT:
 515       return MESA_FORMAT_ALPHA_UINT8;
 516    case PIPE_FORMAT_A16_UINT:
 517       return MESA_FORMAT_ALPHA_UINT16;
 518    case PIPE_FORMAT_A32_UINT:
 519       return MESA_FORMAT_ALPHA_UINT32;
 520    case PIPE_FORMAT_A8_SINT:
 521       return MESA_FORMAT_ALPHA_INT8;
 522    case PIPE_FORMAT_A16_SINT:
 523       return MESA_FORMAT_ALPHA_INT16;
 524    case PIPE_FORMAT_A32_SINT:
 525       return MESA_FORMAT_ALPHA_INT32;
 526
 527    case PIPE_FORMAT_I8_UINT:
 528       return MESA_FORMAT_INTENSITY_UINT8;
 529    case PIPE_FORMAT_I16_UINT:
 530       return MESA_FORMAT_INTENSITY_UINT16;
 531    case PIPE_FORMAT_I32_UINT:
 532       return MESA_FORMAT_INTENSITY_UINT32;
 533    case PIPE_FORMAT_I8_SINT:
 534       return MESA_FORMAT_INTENSITY_INT8;
 535    case PIPE_FORMAT_I16_SINT:
 536       return MESA_FORMAT_INTENSITY_INT16;
 537    case PIPE_FORMAT_I32_SINT:
 538       return MESA_FORMAT_INTENSITY_INT32;
 539
 540   case PIPE_FORMAT_L8_UINT:
 541       return MESA_FORMAT_LUMINANCE_UINT8;
 542    case PIPE_FORMAT_L16_UINT:
 543       return MESA_FORMAT_LUMINANCE_UINT16;
 544    case PIPE_FORMAT_L32_UINT:
 545       return MESA_FORMAT_LUMINANCE_UINT32;
 546    case PIPE_FORMAT_L8_SINT:
 547       return MESA_FORMAT_LUMINANCE_INT8;
 548    case PIPE_FORMAT_L16_SINT:
 549       return MESA_FORMAT_LUMINANCE_INT16;
 550    case PIPE_FORMAT_L32_SINT:
 551       return MESA_FORMAT_LUMINANCE_INT32;
 552
 553    case PIPE_FORMAT_L8A8_UINT:
 554       return MESA_FORMAT_LUMINANCE_ALPHA_UINT8;
 555    case PIPE_FORMAT_L16A16_UINT:
 556       return MESA_FORMAT_LUMINANCE_ALPHA_UINT16;
 557    case PIPE_FORMAT_L32A32_UINT:
 558       return MESA_FORMAT_LUMINANCE_ALPHA_UINT32;
 559    case PIPE_FORMAT_L8A8_SINT:
 560       return MESA_FORMAT_LUMINANCE_ALPHA_INT8;
 561    case PIPE_FORMAT_L16A16_SINT:
 562       return MESA_FORMAT_LUMINANCE_ALPHA_INT16;
 563    case PIPE_FORMAT_L32A32_SINT:
 564       return MESA_FORMAT_LUMINANCE_ALPHA_INT32;
 565
 566    case PIPE_FORMAT_R8_SINT:
 567       return MESA_FORMAT_R_INT8;
 568    case PIPE_FORMAT_R8G8_SINT:
 569       return MESA_FORMAT_RG_INT8;
 570    case PIPE_FORMAT_R8G8B8_SINT:
 571       return MESA_FORMAT_RGB_INT8;
 572    case PIPE_FORMAT_R8G8B8A8_SINT:
 573       return MESA_FORMAT_RGBA_INT8;
 574
 575    case PIPE_FORMAT_R16_SINT:
 576       return MESA_FORMAT_R_INT16;
 577    case PIPE_FORMAT_R16G16_SINT:
 578       return MESA_FORMAT_RG_INT16;
 579    case PIPE_FORMAT_R16G16B16_SINT:
 580       return MESA_FORMAT_RGB_INT16;
 581    case PIPE_FORMAT_R16G16B16A16_SINT:
 582       return MESA_FORMAT_RGBA_INT16;
 583
 584    case PIPE_FORMAT_R32_SINT:
 585       return MESA_FORMAT_R_INT32;
 586    case PIPE_FORMAT_R32G32_SINT:
 587       return MESA_FORMAT_RG_INT32;
 588    case PIPE_FORMAT_R32G32B32_SINT:
 589       return MESA_FORMAT_RGB_INT32;
 590    case PIPE_FORMAT_R32G32B32A32_SINT:
 591       return MESA_FORMAT_RGBA_INT32;
 592
 593    /* unsigned int formats */
 594    case PIPE_FORMAT_R8_UINT:
 595       return MESA_FORMAT_R_UINT8;
 596    case PIPE_FORMAT_R8G8_UINT:
 597       return MESA_FORMAT_RG_UINT8;
 598    case PIPE_FORMAT_R8G8B8_UINT:
 599       return MESA_FORMAT_RGB_UINT8;
 600    case PIPE_FORMAT_R8G8B8A8_UINT:
 601       return MESA_FORMAT_RGBA_UINT8;
 602
 603    case PIPE_FORMAT_R16_UINT:
 604       return MESA_FORMAT_R_UINT16;
 605    case PIPE_FORMAT_R16G16_UINT:
 606       return MESA_FORMAT_RG_UINT16;
 607    case PIPE_FORMAT_R16G16B16_UINT:
 608       return MESA_FORMAT_RGB_UINT16;
 609    case PIPE_FORMAT_R16G16B16A16_UINT:
 610       return MESA_FORMAT_RGBA_UINT16;
 611
 612    case PIPE_FORMAT_R32_UINT:
 613       return MESA_FORMAT_R_UINT32;
 614    case PIPE_FORMAT_R32G32_UINT:
 615       return MESA_FORMAT_RG_UINT32;
 616    case PIPE_FORMAT_R32G32B32_UINT:
 617       return MESA_FORMAT_RGB_UINT32;
 618    case PIPE_FORMAT_R32G32B32A32_UINT:
 619       return MESA_FORMAT_RGBA_UINT32;
 620
 621    case PIPE_FORMAT_RGTC1_UNORM:
 622       return MESA_FORMAT_RED_RGTC1;
 623    case PIPE_FORMAT_RGTC1_SNORM:
 624       return MESA_FORMAT_SIGNED_RED_RGTC1;
 625    case PIPE_FORMAT_RGTC2_UNORM:
 626       return MESA_FORMAT_RG_RGTC2;
 627    case PIPE_FORMAT_RGTC2_SNORM:
 628       return MESA_FORMAT_SIGNED_RG_RGTC2;
 629
 630    case PIPE_FORMAT_LATC1_UNORM:
 631       return MESA_FORMAT_L_LATC1;
 632    case PIPE_FORMAT_LATC1_SNORM:
 633       return MESA_FORMAT_SIGNED_L_LATC1;
 634    case PIPE_FORMAT_LATC2_UNORM:
 635       return MESA_FORMAT_LA_LATC2;
 636    case PIPE_FORMAT_LATC2_SNORM:
 637       return MESA_FORMAT_SIGNED_LA_LATC2;
 638
 639    case PIPE_FORMAT_ETC1_RGB8:
 640       return MESA_FORMAT_ETC1_RGB8;
 641
 642    /* signed normalized formats */
 643    case PIPE_FORMAT_R8_SNORM:
 644       return MESA_FORMAT_SIGNED_R8;
 645    case PIPE_FORMAT_R8G8_SNORM:
 646       return MESA_FORMAT_SIGNED_RG88_REV;
 647    case PIPE_FORMAT_R8G8B8A8_SNORM:
 648       return MESA_FORMAT_SIGNED_RGBA8888_REV;
 649
 650    case PIPE_FORMAT_A8_SNORM:
 651       return MESA_FORMAT_SIGNED_A8;
 652    case PIPE_FORMAT_L8_SNORM:
 653       return MESA_FORMAT_SIGNED_L8;
 654    case PIPE_FORMAT_L8A8_SNORM:
 655       return MESA_FORMAT_SIGNED_AL88;
 656    case PIPE_FORMAT_I8_SNORM:
 657       return MESA_FORMAT_SIGNED_I8;
 658
 659    case PIPE_FORMAT_R16_SNORM:
 660       return MESA_FORMAT_SIGNED_R16;
 661    case PIPE_FORMAT_R16G16_SNORM:
 662       return MESA_FORMAT_SIGNED_GR1616;
 663    case PIPE_FORMAT_R16G16B16A16_SNORM:
 664       return MESA_FORMAT_SIGNED_RGBA_16;
 665
 666    case PIPE_FORMAT_A16_SNORM:
 667       return MESA_FORMAT_SIGNED_A16;
 668    case PIPE_FORMAT_L16_SNORM:
 669       return MESA_FORMAT_SIGNED_L16;
 670    case PIPE_FORMAT_L16A16_SNORM:
 671       return MESA_FORMAT_SIGNED_AL1616;
 672    case PIPE_FORMAT_I16_SNORM:
 673       return MESA_FORMAT_SIGNED_I16;
 674
 675    case PIPE_FORMAT_R9G9B9E5_FLOAT:
 676       return MESA_FORMAT_RGB9_E5_FLOAT;
 677    case PIPE_FORMAT_R11G11B10_FLOAT:
 678       return MESA_FORMAT_R11_G11_B10_FLOAT;
 679
 680    case PIPE_FORMAT_B10G10R10A2_UINT:
 681       return MESA_FORMAT_ARGB2101010_UINT;
 682    default:
 683       assert(0);
 684       return MESA_FORMAT_NONE;
 685    }
 686 }
 687
 688
 689 /**
 690  * Map GL texture formats to Gallium pipe formats.
 691  */
 692 struct format_mapping
 693 {
 694    GLenum glFormats[18];       /**< list of GLenum formats, 0-terminated */
 695    enum pipe_format pipeFormats[13]; /**< list of pipe formats, 0-terminated */
 696 };
 697
 698
 699 #define DEFAULT_RGBA_FORMATS \
 700       PIPE_FORMAT_B8G8R8A8_UNORM, \
 701       PIPE_FORMAT_R8G8B8A8_UNORM, \
 702       PIPE_FORMAT_A8R8G8B8_UNORM, \
 703       PIPE_FORMAT_A8B8G8R8_UNORM, \
 704       0
 705
 706 #define DEFAULT_RGB_FORMATS \
 707       PIPE_FORMAT_B8G8R8X8_UNORM, \
 708       PIPE_FORMAT_R8G8B8X8_UNORM, \
 709       PIPE_FORMAT_X8R8G8B8_UNORM, \
 710       PIPE_FORMAT_X8B8G8R8_UNORM, \
 711       PIPE_FORMAT_B5G6R5_UNORM, \
 712       DEFAULT_RGBA_FORMATS
 713
 714 #define DEFAULT_SRGBA_FORMATS \
 715       PIPE_FORMAT_B8G8R8A8_SRGB, \
 716       PIPE_FORMAT_A8R8G8B8_SRGB, \
 717       PIPE_FORMAT_A8B8G8R8_SRGB, \
 718       0
 719
 720 #define DEFAULT_DEPTH_FORMATS \
 721       PIPE_FORMAT_Z24X8_UNORM, \
 722       PIPE_FORMAT_X8Z24_UNORM, \
 723       PIPE_FORMAT_Z16_UNORM, \
 724       PIPE_FORMAT_Z24_UNORM_S8_UINT, \
 725       PIPE_FORMAT_S8_UINT_Z24_UNORM, \
 726       0
 727
 728 #define DEFAULT_SNORM8_RGBA_FORMATS \
 729       PIPE_FORMAT_R8G8B8A8_SNORM, \
 730       0
 731
 732 #define DEFAULT_UNORM16_RGBA_FORMATS \
 733       PIPE_FORMAT_R16G16B16A16_UNORM, \
 734       DEFAULT_RGBA_FORMATS
 735
 736
 737 /**
 738  * This table maps OpenGL texture format enums to Gallium pipe_format enums.
 739  * Multiple GL enums might map to multiple pipe_formats.
 740  * The first pipe format in the list that's supported is the one that's chosen.
 741  */
 742 static const struct format_mapping format_map[] = {
 743    /* Basic RGB, RGBA formats */
 744    {
 745       { GL_RGB10, GL_RGB10_A2, 0 },
 746       { PIPE_FORMAT_B10G10R10A2_UNORM, DEFAULT_RGBA_FORMATS }
 747    },
 748    {
 749       { 4, GL_RGBA, GL_RGBA8, 0 },
 750       { PIPE_FORMAT_R8G8B8A8_UNORM, DEFAULT_RGBA_FORMATS }
 751    },
 752    {
 753       { GL_BGRA, 0 },
 754       { PIPE_FORMAT_B8G8R8A8_UNORM, DEFAULT_RGBA_FORMATS }
 755    },
 756    {
 757       { 3, GL_RGB, GL_RGB8, 0 },
 758       { DEFAULT_RGB_FORMATS }
 759    },
 760    {
 761       { GL_RGB12, GL_RGB16, GL_RGBA12, GL_RGBA16, 0 },
 762       { PIPE_FORMAT_R16G16B16A16_UNORM, DEFAULT_RGBA_FORMATS }
 763    },
 764    {
 765       { GL_RGBA4, GL_RGBA2, 0 },
 766       { PIPE_FORMAT_B4G4R4A4_UNORM, DEFAULT_RGBA_FORMATS }
 767    },
 768    {
 769       { GL_RGB5_A1, 0 },
 770       { PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
 771    },
 772    {
 773       { GL_R3_G3_B2, 0 },
 774       { PIPE_FORMAT_B2G3R3_UNORM, PIPE_FORMAT_B5G6R5_UNORM,
 775         PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGB_FORMATS }
 776    },
 777    {
 778       { GL_RGB5, GL_RGB4 },
 779       { PIPE_FORMAT_B5G6R5_UNORM, PIPE_FORMAT_B5G5R5A1_UNORM,
 780         DEFAULT_RGB_FORMATS }
 781    },
 782    {
 783       { GL_RGB565 },
 784       { PIPE_FORMAT_B5G6R5_UNORM, DEFAULT_RGB_FORMATS }
 785    },
 786
 787    /* basic Alpha formats */
 788    {
 789       { GL_ALPHA12, GL_ALPHA16, 0 },
 790       { PIPE_FORMAT_A16_UNORM, PIPE_FORMAT_A8_UNORM,
 791         DEFAULT_RGBA_FORMATS }
 792    },
 793    {
 794       { GL_ALPHA, GL_ALPHA4, GL_ALPHA8, GL_COMPRESSED_ALPHA, 0 },
 795       { PIPE_FORMAT_A8_UNORM, DEFAULT_RGBA_FORMATS }
 796    },
 797
 798    /* basic Luminance formats */
 799    {
 800       { GL_LUMINANCE12, GL_LUMINANCE16, 0 },
 801       { PIPE_FORMAT_L16_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
 802    },
 803    {
 804       { 1, GL_LUMINANCE, GL_LUMINANCE4, GL_LUMINANCE8, 0 },
 805       { PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
 806    },
 807
 808    /* basic Luminance/Alpha formats */
 809    {
 810       { GL_LUMINANCE12_ALPHA4, GL_LUMINANCE12_ALPHA12,
 811         GL_LUMINANCE16_ALPHA16, 0},
 812       { PIPE_FORMAT_L16A16_UNORM, PIPE_FORMAT_L8A8_UNORM,
 813         DEFAULT_RGBA_FORMATS }
 814    },
 815    {
 816       { 2, GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, GL_LUMINANCE8_ALPHA8, 0 },
 817       { PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
 818    },
 819    {
 820       { GL_LUMINANCE4_ALPHA4, 0 },
 821       { PIPE_FORMAT_L4A4_UNORM, PIPE_FORMAT_L8A8_UNORM,
 822         DEFAULT_RGBA_FORMATS }
 823    },
 824
 825    /* basic Intensity formats */
 826    {
 827       { GL_INTENSITY12, GL_INTENSITY16, 0 },
 828       { PIPE_FORMAT_I16_UNORM, PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
 829    },
 830    {
 831       { GL_INTENSITY, GL_INTENSITY4, GL_INTENSITY8,
 832         GL_COMPRESSED_INTENSITY, 0 },
 833       { PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
 834    },
 835
 836    /* YCbCr */
 837    {
 838       { GL_YCBCR_MESA, 0 },
 839       { PIPE_FORMAT_UYVY, PIPE_FORMAT_YUYV, 0 }
 840    },
 841
 842    /* compressed formats */ /* XXX PIPE_BIND_SAMPLER_VIEW only */
 843    {
 844       { GL_COMPRESSED_RGB, 0 },
 845       { PIPE_FORMAT_DXT1_RGB, DEFAULT_RGB_FORMATS }
 846    },
 847    {
 848       { GL_COMPRESSED_RGBA, 0 },
 849       { PIPE_FORMAT_DXT5_RGBA, DEFAULT_RGBA_FORMATS }
 850    },
 851    {
 852       { GL_RGB_S3TC, GL_RGB4_S3TC, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 0 },
 853       { PIPE_FORMAT_DXT1_RGB, 0 }
 854    },
 855    {
 856       { GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 0 },
 857       { PIPE_FORMAT_DXT1_RGBA, 0 }
 858    },
 859    {
 860       { GL_RGBA_S3TC, GL_RGBA4_S3TC, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 0 },
 861       { PIPE_FORMAT_DXT3_RGBA, 0 }
 862    },
 863    {
 864       { GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 0 },
 865       { PIPE_FORMAT_DXT5_RGBA, 0 }
 866    },
 867
 868 #if 0
 869    {
 870       { GL_COMPRESSED_RGB_FXT1_3DFX, 0 },
 871       { PIPE_FORMAT_RGB_FXT1, 0 }
 872    },
 873    {
 874       { GL_COMPRESSED_RGBA_FXT1_3DFX, 0 },
 875       { PIPE_FORMAT_RGBA_FXT1, 0 }
 876    },
 877 #endif
 878
 879    /* Depth formats */
 880    {
 881       { GL_DEPTH_COMPONENT16, 0 },
 882       { PIPE_FORMAT_Z16_UNORM, DEFAULT_DEPTH_FORMATS }
 883    },
 884    {
 885       { GL_DEPTH_COMPONENT24, 0 },
 886       { PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
 887         DEFAULT_DEPTH_FORMATS }
 888    },
 889    {
 890       { GL_DEPTH_COMPONENT32, 0 },
 891       { PIPE_FORMAT_Z32_UNORM, DEFAULT_DEPTH_FORMATS }
 892    },
 893    {
 894       { GL_DEPTH_COMPONENT, 0 },
 895       { DEFAULT_DEPTH_FORMATS }
 896    },
 897    {
 898       { GL_DEPTH_COMPONENT32F, 0 },
 899       { PIPE_FORMAT_Z32_FLOAT, 0 }
 900    },
 901
 902    /* stencil formats */
 903    {
 904       { GL_STENCIL_INDEX, GL_STENCIL_INDEX1_EXT, GL_STENCIL_INDEX4_EXT,
 905         GL_STENCIL_INDEX8_EXT, GL_STENCIL_INDEX16_EXT, 0 },
 906       {
 907          PIPE_FORMAT_S8_UINT, PIPE_FORMAT_Z24_UNORM_S8_UINT,
 908          PIPE_FORMAT_S8_UINT_Z24_UNORM, 0
 909       }
 910    },
 911
 912    /* Depth / Stencil formats */
 913    {
 914       { GL_DEPTH_STENCIL_EXT, GL_DEPTH24_STENCIL8_EXT, 0 },
 915       { PIPE_FORMAT_Z24_UNORM_S8_UINT, PIPE_FORMAT_S8_UINT_Z24_UNORM, 0 }
 916    },
 917    {
 918       { GL_DEPTH32F_STENCIL8, 0 },
 919       { PIPE_FORMAT_Z32_FLOAT_S8X24_UINT, 0 }
 920    },
 921
 922    /* sRGB formats */
 923    {
 924       { GL_SRGB_EXT, GL_SRGB8_EXT, GL_SRGB_ALPHA_EXT, GL_SRGB8_ALPHA8_EXT, 0 },
 925       { DEFAULT_SRGBA_FORMATS }
 926    },
 927    {
 928       { GL_COMPRESSED_SRGB_EXT, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT, 0 },
 929       { PIPE_FORMAT_DXT1_SRGB, DEFAULT_SRGBA_FORMATS }
 930    },
 931    {
 932       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 0 },
 933       { PIPE_FORMAT_DXT1_SRGBA, 0 }
 934    },
 935    {
 936       { GL_COMPRESSED_SRGB_ALPHA_EXT,
 937         GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 0 },
 938       { PIPE_FORMAT_DXT3_SRGBA, DEFAULT_SRGBA_FORMATS }
 939    },
 940    {
 941       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 0 },
 942       { PIPE_FORMAT_DXT5_SRGBA, 0 }
 943    },
 944    {
 945       { GL_SLUMINANCE_ALPHA_EXT, GL_SLUMINANCE8_ALPHA8_EXT,
 946         GL_COMPRESSED_SLUMINANCE_ALPHA_EXT, 0 },
 947       { PIPE_FORMAT_L8A8_SRGB, DEFAULT_SRGBA_FORMATS }
 948    },
 949    {
 950       { GL_SLUMINANCE_EXT, GL_SLUMINANCE8_EXT, GL_COMPRESSED_SLUMINANCE_EXT,
 951         0 },
 952       { PIPE_FORMAT_L8_SRGB, DEFAULT_SRGBA_FORMATS }
 953    },
 954
 955    /* 16-bit float formats */
 956    {
 957       { GL_RGBA16F_ARB, 0 },
 958       { PIPE_FORMAT_R16G16B16A16_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 959    },
 960    {
 961       { GL_RGB16F_ARB, 0 },
 962       { PIPE_FORMAT_R16G16B16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 963         PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 964    },
 965    {
 966       { GL_LUMINANCE_ALPHA16F_ARB, 0 },
 967       { PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 968         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 969    },
 970    {
 971       { GL_ALPHA16F_ARB, 0 },
 972       { PIPE_FORMAT_A16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 973         PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 974         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 975    },
 976    {
 977       { GL_INTENSITY16F_ARB, 0 },
 978       { PIPE_FORMAT_I16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 979         PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 980         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 981    },
 982    {
 983       { GL_LUMINANCE16F_ARB, 0 },
 984       { PIPE_FORMAT_L16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 985         PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 986         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 987    },
 988    {
 989       { GL_R16F, 0 },
 990       { PIPE_FORMAT_R16_FLOAT, PIPE_FORMAT_R16G16_FLOAT,
 991         PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 992         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 993    },
 994    {
 995       { GL_RG16F, 0 },
 996       { PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 997         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 998    },
 999
1000    /* 32-bit float formats */
1001    {
1002       { GL_RGBA32F_ARB, 0 },
1003       { PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1004    },
1005    {
1006       { GL_RGB32F_ARB, 0 },
1007       { PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
1008         PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1009    },
1010    {
1011       { GL_LUMINANCE_ALPHA32F_ARB, 0 },
1012       { PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
1013         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1014    },
1015    {
1016       { GL_ALPHA32F_ARB, 0 },
1017       { PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
1018         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_A16_FLOAT,
1019         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1020    },
1021    {
1022       { GL_INTENSITY32F_ARB, 0 },
1023       { PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
1024         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_I16_FLOAT,
1025         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1026    },
1027    {
1028       { GL_LUMINANCE32F_ARB, 0 },
1029       { PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
1030         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_L16_FLOAT,
1031         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1032    },
1033    {
1034       { GL_R32F, 0 },
1035       { PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT,
1036         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16_FLOAT,
1037         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1038    },
1039    {
1040       { GL_RG32F, 0 },
1041       { PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
1042         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
1043    },
1044
1045    /* R, RG formats */
1046    {
1047       { GL_RED, GL_R8, 0 },
1048       { PIPE_FORMAT_R8_UNORM, PIPE_FORMAT_R8G8_UNORM, DEFAULT_RGBA_FORMATS }
1049    },
1050    {
1051       { GL_RG, GL_RG8, 0 },
1052       { PIPE_FORMAT_R8G8_UNORM, DEFAULT_RGBA_FORMATS }
1053    },
1054    {
1055       { GL_R16, 0 },
1056       { PIPE_FORMAT_R16_UNORM, PIPE_FORMAT_R16G16_UNORM,
1057         DEFAULT_UNORM16_RGBA_FORMATS }
1058    },
1059    {
1060       { GL_RG16, 0 },
1061       { PIPE_FORMAT_R16G16_UNORM, DEFAULT_UNORM16_RGBA_FORMATS }
1062    },
1063
1064    /* compressed R, RG formats */
1065    {
1066       { GL_COMPRESSED_RED, GL_COMPRESSED_RED_RGTC1, 0 },
1067       { PIPE_FORMAT_RGTC1_UNORM, PIPE_FORMAT_R8_UNORM, DEFAULT_RGBA_FORMATS }
1068    },
1069    {
1070       { GL_COMPRESSED_SIGNED_RED_RGTC1, 0 },
1071       { PIPE_FORMAT_RGTC1_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1072    },
1073    {
1074       { GL_COMPRESSED_RG, GL_COMPRESSED_RG_RGTC2, 0 },
1075       { PIPE_FORMAT_RGTC2_UNORM, PIPE_FORMAT_R8G8_UNORM, DEFAULT_RGBA_FORMATS }
1076    },
1077    {
1078       { GL_COMPRESSED_SIGNED_RG_RGTC2, 0 },
1079       { PIPE_FORMAT_RGTC2_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1080    },
1081    {
1082       { GL_COMPRESSED_LUMINANCE, GL_COMPRESSED_LUMINANCE_LATC1_EXT, 0 },
1083       { PIPE_FORMAT_LATC1_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGBA_FORMATS }
1084    },
1085    {
1086       { GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT, 0 },
1087       { PIPE_FORMAT_LATC1_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1088    },
1089    {
1090       { GL_COMPRESSED_LUMINANCE_ALPHA, GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT,
1091         GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI, 0 },
1092       { PIPE_FORMAT_LATC2_UNORM, PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
1093    },
1094    {
1095       { GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT, 0 },
1096       { PIPE_FORMAT_LATC2_SNORM, DEFAULT_SNORM8_RGBA_FORMATS }
1097    },
1098
1099    /* ETC1 */
1100    {
1101       { GL_ETC1_RGB8_OES, 0 },
1102       { PIPE_FORMAT_ETC1_RGB8, 0 }
1103    },
1104
1105    /* signed/unsigned integer formats.
1106     */
1107    {
1108       { GL_RGBA_INTEGER_EXT,
1109         GL_BGRA_INTEGER_EXT,
1110         GL_RGBA8I_EXT, 0 },
1111       { PIPE_FORMAT_R8G8B8A8_SINT, 0 }
1112    },
1113    {
1114       { GL_RGB_INTEGER_EXT,
1115         GL_BGR_INTEGER_EXT,
1116         GL_RGB8I_EXT,
1117         GL_BLUE_INTEGER_EXT, 0 },
1118       { PIPE_FORMAT_R8G8B8_SINT,
1119         PIPE_FORMAT_R8G8B8A8_SINT, 0 }
1120    },
1121    {
1122       { GL_ALPHA_INTEGER_EXT,
1123         GL_ALPHA8I_EXT, 0 },
1124       { PIPE_FORMAT_A8_SINT, 0 }
1125    },
1126    {
1127       { GL_ALPHA16I_EXT, 0 },
1128       { PIPE_FORMAT_A16_SINT, 0 }
1129    },
1130    {
1131       { GL_ALPHA32I_EXT, 0 },
1132       { PIPE_FORMAT_A32_SINT, 0 }
1133    },
1134    {
1135       { GL_ALPHA8UI_EXT, 0 },
1136       { PIPE_FORMAT_A8_UINT, 0 }
1137    },
1138    {
1139       { GL_ALPHA16UI_EXT, 0 },
1140       { PIPE_FORMAT_A16_UINT, 0 }
1141    },
1142    {
1143       { GL_ALPHA32UI_EXT, 0 },
1144       { PIPE_FORMAT_A32_UINT, 0 }
1145    },
1146    {
1147       { GL_INTENSITY8I_EXT, 0 },
1148       { PIPE_FORMAT_I8_SINT, 0 }
1149    },
1150    {
1151       { GL_INTENSITY16I_EXT, 0 },
1152       { PIPE_FORMAT_I16_SINT, 0 }
1153    },
1154    {
1155       { GL_INTENSITY32I_EXT, 0 },
1156       { PIPE_FORMAT_I32_SINT, 0 }
1157    },
1158    {
1159       { GL_INTENSITY8UI_EXT, 0 },
1160       { PIPE_FORMAT_I8_UINT, 0 }
1161    },
1162    {
1163       { GL_INTENSITY16UI_EXT, 0 },
1164       { PIPE_FORMAT_I16_UINT, 0 }
1165    },
1166    {
1167       { GL_INTENSITY32UI_EXT, 0 },
1168       { PIPE_FORMAT_I32_UINT, 0 }
1169    },
1170    {
1171       { GL_LUMINANCE8I_EXT, 0 },
1172       { PIPE_FORMAT_L8_SINT, 0 }
1173    },
1174    {
1175       { GL_LUMINANCE16I_EXT, 0 },
1176       { PIPE_FORMAT_L16_SINT, 0 }
1177    },
1178    {
1179       { GL_LUMINANCE32I_EXT, 0 },
1180       { PIPE_FORMAT_L32_SINT, 0 }
1181    },
1182    {
1183       { GL_LUMINANCE_INTEGER_EXT,
1184         GL_LUMINANCE8UI_EXT, 0 },
1185       { PIPE_FORMAT_L8_UINT, 0 }
1186    },
1187    {
1188       { GL_LUMINANCE16UI_EXT, 0 },
1189       { PIPE_FORMAT_L16_UINT, 0 }
1190    },
1191    {
1192       { GL_LUMINANCE32UI_EXT, 0 },
1193       { PIPE_FORMAT_L32_UINT, 0 }
1194    },
1195    {
1196       { GL_LUMINANCE_ALPHA_INTEGER_EXT,
1197         GL_LUMINANCE_ALPHA8I_EXT, 0 },
1198       { PIPE_FORMAT_L8A8_SINT, 0 }
1199    },
1200    {
1201       { GL_LUMINANCE_ALPHA16I_EXT, 0 },
1202       { PIPE_FORMAT_L16A16_SINT, 0 }
1203    },
1204    {
1205       { GL_LUMINANCE_ALPHA32I_EXT, 0 },
1206       { PIPE_FORMAT_L32A32_SINT, 0 }
1207    },
1208    {
1209       { GL_LUMINANCE_ALPHA8UI_EXT, 0 },
1210       { PIPE_FORMAT_L8A8_UINT, 0 }
1211    },
1212    {
1213       { GL_LUMINANCE_ALPHA16UI_EXT, 0 },
1214       { PIPE_FORMAT_L16A16_UINT, 0 }
1215    },
1216    {
1217       { GL_LUMINANCE_ALPHA32UI_EXT, 0 },
1218       { PIPE_FORMAT_L32A32_UINT, 0 }
1219    },
1220    {
1221       { GL_RGB16I_EXT, 0 },
1222       { PIPE_FORMAT_R16G16B16_SINT,
1223         PIPE_FORMAT_R16G16B16A16_SINT, 0 },
1224    },
1225    {
1226       { GL_RGBA16I_EXT, 0 },
1227       { PIPE_FORMAT_R16G16B16A16_SINT, 0 },
1228    },
1229    {
1230       { GL_RGB32I_EXT, 0 },
1231       { PIPE_FORMAT_R32G32B32_SINT,
1232         PIPE_FORMAT_R32G32B32A32_SINT, 0 },
1233    },
1234    {
1235       { GL_RGBA32I_EXT, 0 },
1236       { PIPE_FORMAT_R32G32B32A32_SINT, 0 }
1237    },
1238    {
1239       { GL_RGBA8UI_EXT, 0 },
1240       { PIPE_FORMAT_R8G8B8A8_UINT, 0 }
1241    },
1242    {
1243       { GL_RGB8UI_EXT, 0 },
1244       { PIPE_FORMAT_R8G8B8_UINT,
1245         PIPE_FORMAT_R8G8B8A8_UINT, 0 }
1246    },
1247    {
1248       { GL_RGB16UI_EXT, 0 },
1249       { PIPE_FORMAT_R16G16B16_UINT,
1250         PIPE_FORMAT_R16G16B16A16_UINT, 0 }
1251    },
1252    {
1253       { GL_RGBA16UI_EXT, 0 },
1254       { PIPE_FORMAT_R16G16B16A16_UINT, 0 }
1255    },
1256    {
1257       { GL_RGB32UI_EXT, 0},
1258       { PIPE_FORMAT_R32G32B32_UINT,
1259         PIPE_FORMAT_R32G32B32A32_UINT, 0 }
1260    },
1261    {
1262       { GL_RGBA32UI_EXT, 0},
1263       { PIPE_FORMAT_R32G32B32A32_UINT, 0 }
1264    },
1265    {
1266      { GL_R8I, GL_RED_INTEGER_EXT, 0},
1267      { PIPE_FORMAT_R8_SINT, 0},
1268    },
1269    {
1270      { GL_R16I, 0},
1271      { PIPE_FORMAT_R16_SINT, 0},
1272    },
1273    {
1274      { GL_R32I, 0},
1275      { PIPE_FORMAT_R32_SINT, 0},
1276    },
1277   {
1278      { GL_R8UI, 0},
1279      { PIPE_FORMAT_R8_UINT, 0},
1280    },
1281    {
1282      { GL_R16UI, 0},
1283      { PIPE_FORMAT_R16_UINT, 0},
1284    },
1285    {
1286      { GL_R32UI, 0},
1287      { PIPE_FORMAT_R32_UINT, 0},
1288    },
1289    {
1290      { GL_RG8I, GL_GREEN_INTEGER_EXT, 0},
1291      { PIPE_FORMAT_R8G8_SINT, 0},
1292    },
1293    {
1294      { GL_RG16I, 0},
1295      { PIPE_FORMAT_R16G16_SINT, 0},
1296    },
1297    {
1298      { GL_RG32I, 0},
1299      { PIPE_FORMAT_R32G32_SINT, 0},
1300    },
1301   {
1302      { GL_RG8UI, 0},
1303      { PIPE_FORMAT_R8G8_UINT, 0},
1304    },
1305    {
1306      { GL_RG16UI, 0},
1307      { PIPE_FORMAT_R16G16_UINT, 0},
1308    },
1309    {
1310      { GL_RG32UI, 0},
1311      { PIPE_FORMAT_R32G32_UINT, 0},
1312    },
1313    /* signed normalized formats */
1314    {
1315       { GL_RED_SNORM, GL_R8_SNORM, 0 },
1316       { PIPE_FORMAT_R8_SNORM, PIPE_FORMAT_R8G8_SNORM,
1317         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1318    },
1319    {
1320       { GL_R16_SNORM, 0 },
1321       { PIPE_FORMAT_R16_SNORM,
1322         PIPE_FORMAT_R16G16_SNORM,
1323         PIPE_FORMAT_R16G16B16A16_SNORM,
1324         PIPE_FORMAT_R8_SNORM,
1325         PIPE_FORMAT_R8G8_SNORM,
1326         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1327    },
1328    {
1329       { GL_RG_SNORM, GL_RG8_SNORM, 0 },
1330       { PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1331    },
1332    {
1333       { GL_RG16_SNORM, 0 },
1334       { PIPE_FORMAT_R16G16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1335         PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1336    },
1337    {
1338       { GL_RGB_SNORM, GL_RGB8_SNORM, GL_RGBA_SNORM, GL_RGBA8_SNORM, 0 },
1339       { PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1340    },
1341    {
1342       { GL_RGB16_SNORM, GL_RGBA16_SNORM, 0 },
1343       { PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1344    },
1345    {
1346       { GL_ALPHA_SNORM, GL_ALPHA8_SNORM, 0 },
1347       { PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1348    },
1349    {
1350       { GL_ALPHA16_SNORM, 0 },
1351       { PIPE_FORMAT_A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1352         PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1353    },
1354    {
1355       { GL_LUMINANCE_SNORM, GL_LUMINANCE8_SNORM, 0 },
1356       { PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1357    },
1358    {
1359       { GL_LUMINANCE16_SNORM, 0 },
1360       { PIPE_FORMAT_L16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1361         PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1362    },
1363    {
1364       { GL_LUMINANCE_ALPHA_SNORM, GL_LUMINANCE8_ALPHA8_SNORM, 0 },
1365       { PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1366    },
1367    {
1368       { GL_LUMINANCE16_ALPHA16_SNORM, 0 },
1369       { PIPE_FORMAT_L16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1370         PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1371    },
1372    {
1373       { GL_INTENSITY_SNORM, GL_INTENSITY8_SNORM, 0 },
1374       { PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1375    },
1376    {
1377       { GL_INTENSITY16_SNORM, 0 },
1378       { PIPE_FORMAT_I16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1379         PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1380    },
1381    {
1382       { GL_RGB9_E5, 0 },
1383       { PIPE_FORMAT_R9G9B9E5_FLOAT, 0 }
1384    },
1385    {
1386       { GL_R11F_G11F_B10F, 0 },
1387       { PIPE_FORMAT_R11G11B10_FLOAT, 0 }
1388    },
1389    {
1390       { GL_RGB10_A2UI, 0 },
1391       { PIPE_FORMAT_B10G10R10A2_UINT, 0 }
1392    },
1393 };
1394
1395
1396 /**
1397  * Return first supported format from the given list.
1398  * \param allow_dxt  indicates whether it's OK to return a DXT format.
1399  */
1400 static enum pipe_format
1401 find_supported_format(struct pipe_screen *screen,
1402                       const enum pipe_format formats[],
1403                       enum pipe_texture_target target,
1404                       unsigned sample_count,
1405                       unsigned tex_usage,
1406                       boolean allow_dxt)
1407 {
1408    uint i;
1409    for (i = 0; formats[i]; i++) {
1410       if (screen->is_format_supported(screen, formats[i], target,
1411                                       sample_count, tex_usage)) {
1412          if (!allow_dxt && util_format_is_s3tc(formats[i])) {
1413             /* we can't return a dxt format, continue searching */
1414             continue;
1415          }
1416
1417          return formats[i];
1418       }
1419    }
1420    return PIPE_FORMAT_NONE;
1421 }
1422
1423 struct exact_format_mapping
1424 {
1425    GLenum format;
1426    GLenum type;
1427    enum pipe_format pformat;
1428 };
1429
1430 static const struct exact_format_mapping rgba8888_tbl[] =
1431 {
1432    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8B8G8R8_UNORM },
1433    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_A8B8G8R8_UNORM },
1434    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8A8_UNORM },
1435    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8A8_UNORM },
1436    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8R8G8B8_UNORM },
1437    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8A8_UNORM },
1438    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8A8_UNORM },
1439    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_A8B8G8R8_UNORM },
1440    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8A8_UNORM },
1441    { 0,           0,                              0                          }
1442 };
1443
1444 static const struct exact_format_mapping rgbx8888_tbl[] =
1445 {
1446    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8R8G8B8_UNORM },
1447    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8X8_UNORM },
1448    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8X8_UNORM },
1449    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8B8G8R8_UNORM },
1450    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_X8B8G8R8_UNORM },
1451    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8X8_UNORM },
1452    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8X8_UNORM },
1453    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8X8_UNORM },
1454    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_X8B8G8R8_UNORM },
1455    { 0,           0,                              0                          }
1456 };
1457
1458 static const struct exact_format_mapping rgba1010102_tbl[] =
1459 {
1460    { GL_BGRA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_B10G10R10A2_UNORM },
1461    /* No Mesa formats for these Gallium formats:
1462    { GL_RGBA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_R10G10B10A2_UNORM },
1463    { GL_ABGR_EXT, GL_UNSIGNED_INT_10_10_10_2,     PIPE_FORMAT_R10G10B10A2_UNORM },
1464    { GL_ABGR_EXT, GL_UNSIGNED_INT,                PIPE_FORMAT_R10G10B10A2_UNORM },
1465    */
1466    { 0,           0,                              0                             }
1467 };
1468
1469 /**
1470  * If there is an exact pipe_format match for {internalFormat, format, type}
1471  * return that, otherwise return PIPE_FORMAT_NONE so we can do fuzzy matching.
1472  */
1473 static enum pipe_format
1474 find_exact_format(GLint internalFormat, GLenum format, GLenum type)
1475 {
1476    uint i;
1477    const struct exact_format_mapping* tbl;
1478
1479    if (format == GL_NONE || type == GL_NONE)
1480       return PIPE_FORMAT_NONE;
1481
1482    switch (internalFormat) {
1483    case 4:
1484    case GL_RGBA:
1485    case GL_RGBA8:
1486       tbl = rgba8888_tbl;
1487       break;
1488    case 3:
1489    case GL_RGB:
1490    case GL_RGB8:
1491       tbl = rgbx8888_tbl;
1492       break;
1493    case GL_RGB10_A2:
1494       tbl = rgba1010102_tbl;
1495       break;
1496    default:
1497       return PIPE_FORMAT_NONE;
1498    }
1499
1500    for (i = 0; tbl[i].format; i++)
1501       if (tbl[i].format == format && tbl[i].type == type)
1502          return tbl[i].pformat;
1503
1504    return PIPE_FORMAT_NONE;
1505 }
1506
1507 /**
1508  * Given an OpenGL internalFormat value for a texture or surface, return
1509  * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
1510  * This is called during glTexImage2D, for example.
1511  *
1512  * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
1513  * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
1514  * we want render-to-texture ability.
1515  *
1516  * \param internalFormat  the user value passed to glTexImage2D
1517  * \param target  one of PIPE_TEXTURE_x
1518  * \param bindings  bitmask of PIPE_BIND_x flags.
1519  * \param allow_dxt  indicates whether it's OK to return a DXT format.  This
1520  *                   only matters when internalFormat names a generic or
1521  *                   specific compressed format.  And that should only happen
1522  *                   when we're getting called from gl[Copy]TexImage().
1523  */
1524 enum pipe_format
1525 st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
1526                  GLenum format, GLenum type,
1527                  enum pipe_texture_target target, unsigned sample_count,
1528                  unsigned bindings, boolean allow_dxt)
1529 {
1530    GET_CURRENT_CONTEXT(ctx); /* XXX this should be a function parameter */
1531    int i, j;
1532    enum pipe_format pf;
1533
1534    /* can't render to compressed formats at this time */
1535    if (_mesa_is_compressed_format(ctx, internalFormat)
1536        && (bindings & ~PIPE_BIND_SAMPLER_VIEW)) {
1537       return PIPE_FORMAT_NONE;
1538    }
1539
1540    /* search for exact matches */
1541    pf = find_exact_format(internalFormat, format, type);
1542    if (pf != PIPE_FORMAT_NONE &&
1543        screen->is_format_supported(screen, pf,
1544                                    target, sample_count, bindings))
1545       return pf;
1546
1547    /* search table for internalFormat */
1548    for (i = 0; i < Elements(format_map); i++) {
1549       const struct format_mapping *mapping = &format_map[i];
1550       for (j = 0; mapping->glFormats[j]; j++) {
1551          if (mapping->glFormats[j] == internalFormat) {
1552             /* Found the desired internal format.  Find first pipe format
1553              * which is supported by the driver.
1554              */
1555             return find_supported_format(screen, mapping->pipeFormats,
1556                                          target, sample_count, bindings,
1557                                          allow_dxt);
1558          }
1559       }
1560    }
1561
1562    _mesa_problem(NULL, "unhandled format!\n");
1563    return PIPE_FORMAT_NONE;
1564 }
1565
1566
1567 /**
1568  * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
1569  */
1570 enum pipe_format
1571 st_choose_renderbuffer_format(struct pipe_screen *screen,
1572                               GLenum internalFormat, unsigned sample_count)
1573 {
1574    uint usage;
1575    if (_mesa_is_depth_or_stencil_format(internalFormat))
1576       usage = PIPE_BIND_DEPTH_STENCIL;
1577    else
1578       usage = PIPE_BIND_RENDER_TARGET;
1579    return st_choose_format(screen, internalFormat, GL_NONE, GL_NONE,
1580                            PIPE_TEXTURE_2D, sample_count, usage, FALSE);
1581 }
1582
1583
1584 /**
1585  * Called via ctx->Driver.ChooseTextureFormat().
1586  */
1587 gl_format
1588 st_ChooseTextureFormat(struct gl_context *ctx, GLenum target,
1589                        GLint internalFormat,
1590                        GLenum format, GLenum type)
1591 {
1592    const boolean want_renderable =
1593       internalFormat == 3 || internalFormat == 4 ||
1594       internalFormat == GL_RGB || internalFormat == GL_RGBA ||
1595       internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||
1596       internalFormat == GL_BGRA;
1597    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
1598    enum pipe_format pFormat;
1599    unsigned bindings;
1600
1601    if (target == GL_TEXTURE_1D || target == GL_TEXTURE_1D_ARRAY) {
1602       /* We don't do compression for these texture targets because of
1603        * difficulty with sub-texture updates on non-block boundaries, etc.
1604        * So change the internal format request to an uncompressed format.
1605        */
1606       internalFormat =
1607         _mesa_generic_compressed_format_to_uncompressed_format(internalFormat);
1608    }
1609
1610    /* GL textures may wind up being render targets, but we don't know
1611     * that in advance.  Specify potential render target flags now.
1612     */
1613    bindings = PIPE_BIND_SAMPLER_VIEW;
1614    if (want_renderable) {
1615       if (_mesa_is_depth_or_stencil_format(internalFormat))
1616          bindings |= PIPE_BIND_DEPTH_STENCIL;
1617       else
1618          bindings |= PIPE_BIND_RENDER_TARGET;
1619    }
1620
1621    pFormat = st_choose_format(screen, internalFormat, format, type,
1622                               PIPE_TEXTURE_2D, 0, bindings, ctx->Mesa_DXTn);
1623
1624    if (pFormat == PIPE_FORMAT_NONE) {
1625       /* try choosing format again, this time without render target bindings */
1626       pFormat = st_choose_format(screen, internalFormat, format, type,
1627                                  PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW,
1628                                  ctx->Mesa_DXTn);
1629    }
1630
1631    if (pFormat == PIPE_FORMAT_NONE) {
1632       /* no luck at all */
1633       return MESA_FORMAT_NONE;
1634    }
1635
1636    return st_pipe_format_to_mesa_format(pFormat);
1637 }
1638
1639
1640 /**
1641  * Called via ctx->Driver.ChooseTextureFormat().
1642  */
1643 size_t
1644 st_QuerySamplesForFormat(struct gl_context *ctx, GLenum internalFormat,
1645                          int samples[16])
1646 {
1647    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
1648    enum pipe_format format;
1649    unsigned i, bind, num_sample_counts = 0;
1650
1651    if (_mesa_is_depth_or_stencil_format(internalFormat))
1652       bind = PIPE_BIND_DEPTH_STENCIL;
1653    else
1654       bind = PIPE_BIND_RENDER_TARGET;
1655
1656    /* Set sample counts in descending order. */
1657    for (i = 16; i > 1; i--) {
1658       format = st_choose_format(screen, internalFormat, GL_NONE, GL_NONE,
1659                                 PIPE_TEXTURE_2D, i, bind, FALSE);
1660
1661       if (format != PIPE_FORMAT_NONE) {
1662          samples[num_sample_counts++] = i;
1663       }
1664    }
1665
1666    if (!num_sample_counts) {
1667       samples[num_sample_counts++] = 1;
1668    }
1669
1670    return num_sample_counts;
1671 }
1672
1673
1674 GLboolean
1675 st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
1676 {
1677    if (format1 == format2)
1678       return GL_TRUE;
1679
1680    if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&
1681        format2 == PIPE_FORMAT_B8G8R8X8_UNORM)
1682       return GL_TRUE;
1683
1684    if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&
1685        format2 == PIPE_FORMAT_B8G8R8A8_UNORM)
1686       return GL_TRUE;
1687
1688    if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&
1689        format2 == PIPE_FORMAT_X8B8G8R8_UNORM)
1690       return GL_TRUE;
1691
1692    if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&
1693        format2 == PIPE_FORMAT_A8B8G8R8_UNORM)
1694       return GL_TRUE;
1695
1696    if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&
1697        format2 == PIPE_FORMAT_X8R8G8B8_UNORM)
1698       return GL_TRUE;
1699
1700    if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&
1701        format2 == PIPE_FORMAT_A8R8G8B8_UNORM)
1702       return GL_TRUE;
1703
1704    return GL_FALSE;
1705 }
1706
1707
1708
1709 /**
1710  * This is used for translating texture border color and the clear
1711  * color.  For example, the clear color is interpreted according to
1712  * the renderbuffer's base format.  For example, if clearing a
1713  * GL_LUMINANCE buffer, we'll return colorOut[0] = colorOut[1] =
1714  * colorOut[2] = colorIn[0].
1715  * Similarly for texture border colors.
1716  */
1717 void
1718 st_translate_color(union gl_color_union *colorIn,
1719                    union pipe_color_union *colorOut,
1720                    GLenum baseFormat, GLboolean is_integer)
1721 {
1722    if (is_integer) {
1723       int *in = colorIn->i;
1724       int *out = colorOut->i;
1725
1726       switch (baseFormat) {
1727       case GL_RED:
1728          out[0] = in[0];
1729          out[1] = 0;
1730          out[2] = 0;
1731          out[3] = 1;
1732          break;
1733       case GL_RG:
1734          out[0] = in[0];
1735          out[1] = in[1];
1736          out[2] = 0;
1737          out[3] = 1;
1738          break;
1739       case GL_RGB:
1740          out[0] = in[0];
1741          out[1] = in[1];
1742          out[2] = in[2];
1743          out[3] = 1;
1744          break;
1745       case GL_ALPHA:
1746          out[0] = out[1] = out[2] = 0;
1747          out[3] = in[3];
1748          break;
1749       case GL_LUMINANCE:
1750          out[0] = out[1] = out[2] = in[0];
1751          out[3] = 1;
1752          break;
1753       case GL_LUMINANCE_ALPHA:
1754          out[0] = out[1] = out[2] = in[0];
1755          out[3] = in[3];
1756          break;
1757       case GL_INTENSITY:
1758          out[0] = out[1] = out[2] = out[3] = in[0];
1759          break;
1760       default:
1761          COPY_4V(out, in);
1762       }
1763    }
1764    else {
1765       float *in = colorIn->f;
1766       float *out = colorOut->f;
1767
1768       switch (baseFormat) {
1769       case GL_RED:
1770          out[0] = in[0];
1771          out[1] = 0.0F;
1772          out[2] = 0.0F;
1773          out[3] = 1.0F;
1774          break;
1775       case GL_RG:
1776          out[0] = in[0];
1777          out[1] = in[1];
1778          out[2] = 0.0F;
1779          out[3] = 1.0F;
1780          break;
1781       case GL_RGB:
1782          out[0] = in[0];
1783          out[1] = in[1];
1784          out[2] = in[2];
1785          out[3] = 1.0F;
1786          break;
1787       case GL_ALPHA:
1788          out[0] = out[1] = out[2] = 0.0F;
1789          out[3] = in[3];
1790          break;
1791       case GL_LUMINANCE:
1792          out[0] = out[1] = out[2] = in[0];
1793          out[3] = 1.0F;
1794          break;
1795       case GL_LUMINANCE_ALPHA:
1796          out[0] = out[1] = out[2] = in[0];
1797          out[3] = in[3];
1798          break;
1799       case GL_INTENSITY:
1800          out[0] = out[1] = out[2] = out[3] = in[0];
1801          break;
1802       default:
1803          COPY_4V(out, in);
1804       }
1805    }
1806 }