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    case MESA_FORMAT_RGB9_E5_FLOAT:
 329       return PIPE_FORMAT_R9G9B9E5_FLOAT;
 330    case MESA_FORMAT_R11_G11_B10_FLOAT:
 331       return PIPE_FORMAT_R11G11B10_FLOAT;
 332
 333    default:
 334       assert(0);
 335       return PIPE_FORMAT_NONE;
 336    }
 337 }
 338
 339
 340 /**
 341  * Translate Gallium format to Mesa format.
 342  */
 343 gl_format
 344 st_pipe_format_to_mesa_format(enum pipe_format format)
 345 {
 346    switch (format) {
 347    case PIPE_FORMAT_A8B8G8R8_UNORM:
 348       return MESA_FORMAT_RGBA8888;
 349    case PIPE_FORMAT_R8G8B8A8_UNORM:
 350       return MESA_FORMAT_RGBA8888_REV;
 351    case PIPE_FORMAT_B8G8R8A8_UNORM:
 352       return MESA_FORMAT_ARGB8888;
 353    case PIPE_FORMAT_A8R8G8B8_UNORM:
 354       return MESA_FORMAT_ARGB8888_REV;
 355    case PIPE_FORMAT_B8G8R8X8_UNORM:
 356       return MESA_FORMAT_XRGB8888;
 357    case PIPE_FORMAT_X8R8G8B8_UNORM:
 358       return MESA_FORMAT_XRGB8888_REV;
 359    case PIPE_FORMAT_B5G5R5A1_UNORM:
 360       return MESA_FORMAT_ARGB1555;
 361    case PIPE_FORMAT_B4G4R4A4_UNORM:
 362       return MESA_FORMAT_ARGB4444;
 363    case PIPE_FORMAT_B5G6R5_UNORM:
 364       return MESA_FORMAT_RGB565;
 365    case PIPE_FORMAT_B2G3R3_UNORM:
 366       return MESA_FORMAT_RGB332;
 367    case PIPE_FORMAT_B10G10R10A2_UNORM:
 368       return MESA_FORMAT_ARGB2101010;
 369    case PIPE_FORMAT_L4A4_UNORM:
 370       return MESA_FORMAT_AL44;
 371    case PIPE_FORMAT_L8A8_UNORM:
 372       return MESA_FORMAT_AL88;
 373    case PIPE_FORMAT_L16A16_UNORM:
 374       return MESA_FORMAT_AL1616;
 375    case PIPE_FORMAT_A8_UNORM:
 376       return MESA_FORMAT_A8;
 377    case PIPE_FORMAT_A16_UNORM:
 378       return MESA_FORMAT_A16;
 379    case PIPE_FORMAT_L8_UNORM:
 380       return MESA_FORMAT_L8;
 381    case PIPE_FORMAT_L16_UNORM:
 382       return MESA_FORMAT_L16;
 383    case PIPE_FORMAT_I8_UNORM:
 384       return MESA_FORMAT_I8;
 385    case PIPE_FORMAT_I16_UNORM:
 386       return MESA_FORMAT_I16;
 387    case PIPE_FORMAT_S8_USCALED:
 388       return MESA_FORMAT_S8;
 389
 390    case PIPE_FORMAT_R16G16B16A16_UNORM:
 391       return MESA_FORMAT_RGBA_16;
 392
 393    case PIPE_FORMAT_Z16_UNORM:
 394       return MESA_FORMAT_Z16;
 395    case PIPE_FORMAT_Z32_UNORM:
 396       return MESA_FORMAT_Z32;
 397    case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
 398       return MESA_FORMAT_Z24_S8;
 399    case PIPE_FORMAT_X8Z24_UNORM:
 400       return MESA_FORMAT_Z24_X8;
 401    case PIPE_FORMAT_Z24X8_UNORM:
 402       return MESA_FORMAT_X8_Z24;
 403    case PIPE_FORMAT_Z24_UNORM_S8_USCALED:
 404       return MESA_FORMAT_S8_Z24;
 405
 406    case PIPE_FORMAT_UYVY:
 407       return MESA_FORMAT_YCBCR;
 408    case PIPE_FORMAT_YUYV:
 409       return MESA_FORMAT_YCBCR_REV;
 410
 411 #if FEATURE_texture_s3tc
 412    case PIPE_FORMAT_DXT1_RGB:
 413       return MESA_FORMAT_RGB_DXT1;
 414    case PIPE_FORMAT_DXT1_RGBA:
 415       return MESA_FORMAT_RGBA_DXT1;
 416    case PIPE_FORMAT_DXT3_RGBA:
 417       return MESA_FORMAT_RGBA_DXT3;
 418    case PIPE_FORMAT_DXT5_RGBA:
 419       return MESA_FORMAT_RGBA_DXT5;
 420 #if FEATURE_EXT_texture_sRGB
 421    case PIPE_FORMAT_DXT1_SRGB:
 422       return MESA_FORMAT_SRGB_DXT1;
 423    case PIPE_FORMAT_DXT1_SRGBA:
 424       return MESA_FORMAT_SRGBA_DXT1;
 425    case PIPE_FORMAT_DXT3_SRGBA:
 426       return MESA_FORMAT_SRGBA_DXT3;
 427    case PIPE_FORMAT_DXT5_SRGBA:
 428       return MESA_FORMAT_SRGBA_DXT5;
 429 #endif
 430 #endif
 431
 432 #if FEATURE_EXT_texture_sRGB
 433    case PIPE_FORMAT_L8A8_SRGB:
 434       return MESA_FORMAT_SLA8;
 435    case PIPE_FORMAT_L8_SRGB:
 436       return MESA_FORMAT_SL8;
 437    case PIPE_FORMAT_R8G8B8_SRGB:
 438       return MESA_FORMAT_SRGB8;
 439    case PIPE_FORMAT_A8B8G8R8_SRGB:
 440       return MESA_FORMAT_SRGBA8;
 441    case PIPE_FORMAT_B8G8R8A8_SRGB:
 442       return MESA_FORMAT_SARGB8;
 443 #endif
 444    case PIPE_FORMAT_R32G32B32A32_FLOAT:
 445       return MESA_FORMAT_RGBA_FLOAT32;
 446    case PIPE_FORMAT_R16G16B16A16_FLOAT:
 447       return MESA_FORMAT_RGBA_FLOAT16;
 448    case PIPE_FORMAT_R32G32B32_FLOAT:
 449       return MESA_FORMAT_RGB_FLOAT32;
 450    case PIPE_FORMAT_R16G16B16_FLOAT:
 451       return MESA_FORMAT_RGB_FLOAT16;
 452    case PIPE_FORMAT_L32A32_FLOAT:
 453       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT32;
 454    case PIPE_FORMAT_L16A16_FLOAT:
 455       return MESA_FORMAT_LUMINANCE_ALPHA_FLOAT16;
 456    case PIPE_FORMAT_L32_FLOAT:
 457       return MESA_FORMAT_LUMINANCE_FLOAT32;
 458    case PIPE_FORMAT_L16_FLOAT:
 459       return MESA_FORMAT_LUMINANCE_FLOAT16;
 460    case PIPE_FORMAT_A32_FLOAT:
 461       return MESA_FORMAT_ALPHA_FLOAT32;
 462    case PIPE_FORMAT_A16_FLOAT:
 463       return MESA_FORMAT_ALPHA_FLOAT16;
 464    case PIPE_FORMAT_I32_FLOAT:
 465       return MESA_FORMAT_INTENSITY_FLOAT32;
 466    case PIPE_FORMAT_I16_FLOAT:
 467       return MESA_FORMAT_INTENSITY_FLOAT16;
 468    case PIPE_FORMAT_R32_FLOAT:
 469       return MESA_FORMAT_R_FLOAT32;
 470    case PIPE_FORMAT_R16_FLOAT:
 471       return MESA_FORMAT_R_FLOAT16;
 472    case PIPE_FORMAT_R32G32_FLOAT:
 473       return MESA_FORMAT_RG_FLOAT32;
 474    case PIPE_FORMAT_R16G16_FLOAT:
 475       return MESA_FORMAT_RG_FLOAT16;
 476
 477    case PIPE_FORMAT_R8_UNORM:
 478       return MESA_FORMAT_R8;
 479    case PIPE_FORMAT_R16_UNORM:
 480       return MESA_FORMAT_R16;
 481    case PIPE_FORMAT_R8G8_UNORM:
 482       return MESA_FORMAT_RG88;
 483    case PIPE_FORMAT_R16G16_UNORM:
 484       return MESA_FORMAT_RG1616;
 485
 486    /* signed int formats */
 487    case PIPE_FORMAT_R8G8B8A8_SSCALED:
 488       return MESA_FORMAT_RGBA_INT8;
 489    case PIPE_FORMAT_R16G16B16A16_SSCALED:
 490       return MESA_FORMAT_RGBA_INT16;
 491    case PIPE_FORMAT_R32G32B32A32_SSCALED:
 492       return MESA_FORMAT_RGBA_INT32;
 493
 494    /* unsigned int formats */
 495    case PIPE_FORMAT_R8G8B8A8_USCALED:
 496       return MESA_FORMAT_RGBA_UINT8;
 497    case PIPE_FORMAT_R16G16B16A16_USCALED:
 498       return MESA_FORMAT_RGBA_UINT16;
 499    case PIPE_FORMAT_R32G32B32A32_USCALED:
 500       return MESA_FORMAT_RGBA_UINT32;
 501
 502    case PIPE_FORMAT_RGTC1_UNORM:
 503       return MESA_FORMAT_RED_RGTC1;
 504    case PIPE_FORMAT_RGTC1_SNORM:
 505       return MESA_FORMAT_SIGNED_RED_RGTC1;
 506    case PIPE_FORMAT_RGTC2_UNORM:
 507       return MESA_FORMAT_RG_RGTC2;
 508    case PIPE_FORMAT_RGTC2_SNORM:
 509       return MESA_FORMAT_SIGNED_RG_RGTC2;
 510
 511    case PIPE_FORMAT_LATC1_UNORM:
 512       return MESA_FORMAT_L_LATC1;
 513    case PIPE_FORMAT_LATC1_SNORM:
 514       return MESA_FORMAT_SIGNED_L_LATC1;
 515    case PIPE_FORMAT_LATC2_UNORM:
 516       return MESA_FORMAT_LA_LATC2;
 517    case PIPE_FORMAT_LATC2_SNORM:
 518       return MESA_FORMAT_SIGNED_LA_LATC2;
 519
 520    /* signed normalized formats */
 521    case PIPE_FORMAT_R8_SNORM:
 522       return MESA_FORMAT_SIGNED_R8;
 523    case PIPE_FORMAT_R8G8_SNORM:
 524       return MESA_FORMAT_SIGNED_RG88_REV;
 525    case PIPE_FORMAT_R8G8B8A8_SNORM:
 526       return MESA_FORMAT_SIGNED_RGBA8888_REV;
 527
 528    case PIPE_FORMAT_A8_SNORM:
 529       return MESA_FORMAT_SIGNED_A8;
 530    case PIPE_FORMAT_L8_SNORM:
 531       return MESA_FORMAT_SIGNED_L8;
 532    case PIPE_FORMAT_L8A8_SNORM:
 533       return MESA_FORMAT_SIGNED_AL88;
 534    case PIPE_FORMAT_I8_SNORM:
 535       return MESA_FORMAT_SIGNED_I8;
 536
 537    case PIPE_FORMAT_R16_SNORM:
 538       return MESA_FORMAT_SIGNED_R16;
 539    case PIPE_FORMAT_R16G16_SNORM:
 540       return MESA_FORMAT_SIGNED_GR1616;
 541    case PIPE_FORMAT_R16G16B16A16_SNORM:
 542       return MESA_FORMAT_SIGNED_RGBA_16;
 543
 544    case PIPE_FORMAT_A16_SNORM:
 545       return MESA_FORMAT_SIGNED_A16;
 546    case PIPE_FORMAT_L16_SNORM:
 547       return MESA_FORMAT_SIGNED_L16;
 548    case PIPE_FORMAT_L16A16_SNORM:
 549       return MESA_FORMAT_SIGNED_AL1616;
 550    case PIPE_FORMAT_I16_SNORM:
 551       return MESA_FORMAT_SIGNED_I16;
 552
 553    case PIPE_FORMAT_R9G9B9E5_FLOAT:
 554       return MESA_FORMAT_RGB9_E5_FLOAT;
 555    case PIPE_FORMAT_R11G11B10_FLOAT:
 556       return MESA_FORMAT_R11_G11_B10_FLOAT;
 557
 558    default:
 559       assert(0);
 560       return MESA_FORMAT_NONE;
 561    }
 562 }
 563
 564
 565 /**
 566  * Map GL texture formats to Gallium pipe formats.
 567  */
 568 struct format_mapping
 569 {
 570    GLenum glFormats[18];       /**< list of GLenum formats, 0-terminated */
 571    enum pipe_format pipeFormats[10]; /**< list of pipe formats, 0-terminated */
 572 };
 573
 574
 575 #define DEFAULT_RGBA_FORMATS \
 576       PIPE_FORMAT_B8G8R8A8_UNORM, \
 577       PIPE_FORMAT_A8R8G8B8_UNORM, \
 578       PIPE_FORMAT_A8B8G8R8_UNORM, \
 579       PIPE_FORMAT_B5G6R5_UNORM, \
 580       0
 581
 582 #define DEFAULT_RGB_FORMATS \
 583       PIPE_FORMAT_B8G8R8X8_UNORM, \
 584       PIPE_FORMAT_X8R8G8B8_UNORM, \
 585       PIPE_FORMAT_X8B8G8R8_UNORM, \
 586       PIPE_FORMAT_B8G8R8A8_UNORM, \
 587       PIPE_FORMAT_A8R8G8B8_UNORM, \
 588       PIPE_FORMAT_A8B8G8R8_UNORM, \
 589       PIPE_FORMAT_B5G6R5_UNORM, \
 590       0
 591
 592 #define DEFAULT_SRGBA_FORMATS \
 593       PIPE_FORMAT_B8G8R8A8_SRGB, \
 594       PIPE_FORMAT_A8R8G8B8_SRGB, \
 595       PIPE_FORMAT_A8B8G8R8_SRGB, \
 596       0
 597
 598 #define DEFAULT_DEPTH_FORMATS \
 599       PIPE_FORMAT_Z24X8_UNORM, \
 600       PIPE_FORMAT_X8Z24_UNORM, \
 601       PIPE_FORMAT_Z16_UNORM, \
 602       PIPE_FORMAT_Z24_UNORM_S8_USCALED, \
 603       PIPE_FORMAT_S8_USCALED_Z24_UNORM, \
 604       0
 605
 606 /**
 607  * This table maps OpenGL texture format enums to Gallium pipe_format enums.
 608  * Multiple GL enums might map to multiple pipe_formats.
 609  * The first pipe format in the list that's supported is the one that's chosen.
 610  */
 611 static const struct format_mapping format_map[] = {
 612    /* Basic RGB, RGBA formats */
 613    {
 614       { GL_RGB10, GL_RGB10_A2, 0 },
 615       { PIPE_FORMAT_B10G10R10A2_UNORM, DEFAULT_RGBA_FORMATS }
 616    },
 617    {
 618       { 4, GL_RGBA, GL_RGBA8, 0 },
 619       { PIPE_FORMAT_R8G8B8A8_UNORM, DEFAULT_RGBA_FORMATS }
 620    },
 621    {
 622       { GL_BGRA, 0 },
 623       { PIPE_FORMAT_B8G8R8A8_UNORM, DEFAULT_RGBA_FORMATS }
 624    },
 625    {
 626       { 3, GL_RGB, GL_RGB8, 0 },
 627       { DEFAULT_RGB_FORMATS }
 628    },
 629    {
 630       { GL_RGB12, GL_RGB16, GL_RGBA12, GL_RGBA16, 0 },
 631       { PIPE_FORMAT_R16G16B16A16_UNORM, DEFAULT_RGBA_FORMATS }
 632    },
 633    {
 634       { GL_RGBA4, GL_RGBA2, 0 },
 635       { PIPE_FORMAT_B4G4R4A4_UNORM, DEFAULT_RGBA_FORMATS }
 636    },
 637    {
 638       { GL_RGB5_A1, 0 },
 639       { PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
 640    },
 641    {
 642       { GL_R3_G3_B2, 0 },
 643       { PIPE_FORMAT_B2G3R3_UNORM, PIPE_FORMAT_B5G6R5_UNORM,
 644         PIPE_FORMAT_B5G5R5A1_UNORM, DEFAULT_RGBA_FORMATS }
 645    },
 646    {
 647       { GL_RGB5, GL_RGB4 },
 648       { PIPE_FORMAT_B5G6R5_UNORM, PIPE_FORMAT_B5G5R5A1_UNORM,
 649         DEFAULT_RGBA_FORMATS }
 650    },
 651
 652    /* basic Alpha formats */
 653    {
 654       { GL_ALPHA12, GL_ALPHA16, 0 },
 655       { PIPE_FORMAT_A16_UNORM, PIPE_FORMAT_A8_UNORM,
 656         DEFAULT_RGBA_FORMATS }
 657    },
 658    {
 659       { GL_ALPHA, GL_ALPHA4, GL_ALPHA8, GL_COMPRESSED_ALPHA, 0 },
 660       { PIPE_FORMAT_A8_UNORM, DEFAULT_RGBA_FORMATS }
 661    },
 662
 663    /* basic Luminance formats */
 664    {
 665       { GL_LUMINANCE12, GL_LUMINANCE16, 0 },
 666       { PIPE_FORMAT_L16_UNORM, PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
 667    },
 668    {
 669       { 1, GL_LUMINANCE, GL_LUMINANCE4, GL_LUMINANCE8, 0 },
 670       { PIPE_FORMAT_L8_UNORM, DEFAULT_RGB_FORMATS }
 671    },
 672
 673    /* basic Luminance/Alpha formats */
 674    {
 675       { GL_LUMINANCE12_ALPHA4, GL_LUMINANCE12_ALPHA12,
 676         GL_LUMINANCE16_ALPHA16, 0},
 677       { PIPE_FORMAT_L16A16_UNORM, PIPE_FORMAT_L8A8_UNORM,
 678         DEFAULT_RGBA_FORMATS }
 679    },
 680    {
 681       { 2, GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, GL_LUMINANCE8_ALPHA8, 0 },
 682       { PIPE_FORMAT_L8A8_UNORM, DEFAULT_RGBA_FORMATS }
 683    },
 684    {
 685       { GL_LUMINANCE4_ALPHA4, 0 },
 686       { PIPE_FORMAT_L4A4_UNORM, PIPE_FORMAT_L8A8_UNORM,
 687         DEFAULT_RGBA_FORMATS }
 688    },
 689
 690    /* basic Intensity formats */
 691    {
 692       { GL_INTENSITY12, GL_INTENSITY16, 0 },
 693       { PIPE_FORMAT_I16_UNORM, PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
 694    },
 695    {
 696       { GL_INTENSITY, GL_INTENSITY4, GL_INTENSITY8,
 697         GL_COMPRESSED_INTENSITY, 0 },
 698       { PIPE_FORMAT_I8_UNORM, DEFAULT_RGBA_FORMATS }
 699    },
 700
 701    /* YCbCr */
 702    {
 703       { GL_YCBCR_MESA, 0 },
 704       { PIPE_FORMAT_UYVY, PIPE_FORMAT_YUYV, 0 }
 705    },
 706
 707    /* compressed formats */ /* XXX PIPE_BIND_SAMPLER_VIEW only */
 708    {
 709       { GL_COMPRESSED_RGB, 0 },
 710       { PIPE_FORMAT_DXT1_RGB, DEFAULT_RGB_FORMATS }
 711    },
 712    {
 713       { GL_COMPRESSED_RGBA, 0 },
 714       { PIPE_FORMAT_DXT5_RGBA, DEFAULT_RGBA_FORMATS }
 715    },
 716    {
 717       { GL_RGB_S3TC, GL_RGB4_S3TC, GL_COMPRESSED_RGB_S3TC_DXT1_EXT, 0 },
 718       { PIPE_FORMAT_DXT1_RGB, 0 }
 719    },
 720    {
 721       { GL_COMPRESSED_RGBA_S3TC_DXT1_EXT, 0 },
 722       { PIPE_FORMAT_DXT1_RGBA, 0 }
 723    },
 724    {
 725       { GL_RGBA_S3TC, GL_RGBA4_S3TC, GL_COMPRESSED_RGBA_S3TC_DXT3_EXT, 0 },
 726       { PIPE_FORMAT_DXT3_RGBA, 0 }
 727    },
 728    {
 729       { GL_COMPRESSED_RGBA_S3TC_DXT5_EXT, 0 },
 730       { PIPE_FORMAT_DXT5_RGBA, 0 }
 731    },
 732
 733 #if 0
 734    {
 735       { GL_COMPRESSED_RGB_FXT1_3DFX, 0 },
 736       { PIPE_FORMAT_RGB_FXT1, 0 }
 737    },
 738    {
 739       { GL_COMPRESSED_RGBA_FXT1_3DFX, 0 },
 740       { PIPE_FORMAT_RGBA_FXT1, 0 }
 741    },
 742 #endif
 743
 744    /* Depth formats */
 745    {
 746       { GL_DEPTH_COMPONENT16, 0 },
 747       { PIPE_FORMAT_Z16_UNORM, DEFAULT_DEPTH_FORMATS }
 748    },
 749    {
 750       { GL_DEPTH_COMPONENT24, 0 },
 751       { PIPE_FORMAT_Z24X8_UNORM, PIPE_FORMAT_X8Z24_UNORM,
 752         DEFAULT_DEPTH_FORMATS }
 753    },
 754    {
 755       { GL_DEPTH_COMPONENT32, 0 },
 756       { PIPE_FORMAT_Z32_UNORM, DEFAULT_DEPTH_FORMATS }
 757    },
 758    {
 759       { GL_DEPTH_COMPONENT, 0 },
 760       { DEFAULT_DEPTH_FORMATS }
 761    },
 762
 763    /* stencil formats */
 764    {
 765       { GL_STENCIL_INDEX, GL_STENCIL_INDEX1_EXT, GL_STENCIL_INDEX4_EXT,
 766         GL_STENCIL_INDEX8_EXT, GL_STENCIL_INDEX16_EXT, 0 },
 767       {
 768          PIPE_FORMAT_S8_USCALED, PIPE_FORMAT_Z24_UNORM_S8_USCALED,
 769          PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0
 770       }
 771    },
 772
 773    /* Depth / Stencil formats */
 774    {
 775       { GL_DEPTH_STENCIL_EXT, GL_DEPTH24_STENCIL8_EXT, 0 },
 776       { PIPE_FORMAT_Z24_UNORM_S8_USCALED, PIPE_FORMAT_S8_USCALED_Z24_UNORM, 0 }
 777    },
 778
 779    /* sRGB formats */
 780    {
 781       { GL_SRGB_EXT, GL_SRGB8_EXT, GL_SRGB_ALPHA_EXT, GL_SRGB8_ALPHA8_EXT, 0 },
 782       { DEFAULT_SRGBA_FORMATS }
 783    },
 784    {
 785       { GL_COMPRESSED_SRGB_EXT, GL_COMPRESSED_SRGB_S3TC_DXT1_EXT, 0 },
 786       { PIPE_FORMAT_DXT1_SRGB, DEFAULT_SRGBA_FORMATS }
 787    },
 788    {
 789       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT, 0 },
 790       { PIPE_FORMAT_DXT1_SRGBA, 0 }
 791    },
 792    {
 793       { GL_COMPRESSED_SRGB_ALPHA_EXT,
 794         GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT, 0 },
 795       { PIPE_FORMAT_DXT3_SRGBA, DEFAULT_SRGBA_FORMATS }
 796    },
 797    {
 798       { GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT, 0 },
 799       { PIPE_FORMAT_DXT5_SRGBA, 0 }
 800    },
 801    {
 802       { GL_SLUMINANCE_ALPHA_EXT, GL_SLUMINANCE8_ALPHA8_EXT,
 803         GL_COMPRESSED_SLUMINANCE_EXT, GL_COMPRESSED_SLUMINANCE_ALPHA_EXT, 0 },
 804       { PIPE_FORMAT_L8A8_SRGB, DEFAULT_SRGBA_FORMATS }
 805    },
 806    {
 807       { GL_SLUMINANCE_EXT, GL_SLUMINANCE8_EXT, 0 },
 808       { PIPE_FORMAT_L8_SRGB, DEFAULT_SRGBA_FORMATS }
 809    },
 810
 811    /* 16-bit float formats */
 812    {
 813       { GL_RGBA16F_ARB, 0 },
 814       { PIPE_FORMAT_R16G16B16A16_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 815    },
 816    {
 817       { GL_RGB16F_ARB, 0 },
 818       { PIPE_FORMAT_R16G16B16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 819         PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 820    },
 821    {
 822       { GL_LUMINANCE_ALPHA16F_ARB, 0 },
 823       { PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 824         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 825    },
 826    {
 827       { GL_ALPHA16F_ARB, 0 },
 828       { PIPE_FORMAT_A16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 829         PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 830         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 831    },
 832    {
 833       { GL_INTENSITY16F_ARB, 0 },
 834       { PIPE_FORMAT_I16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 835         PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 836         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 837    },
 838    {
 839       { GL_LUMINANCE16F_ARB, 0 },
 840       { PIPE_FORMAT_L16_FLOAT, PIPE_FORMAT_L16A16_FLOAT,
 841         PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 842         PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 843    },
 844    {
 845       { GL_R16F, 0 },
 846       { PIPE_FORMAT_R16_FLOAT, PIPE_FORMAT_R16G16_FLOAT,
 847         PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 848         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 849    },
 850    {
 851       { GL_RG16F, 0 },
 852       { PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT,
 853         PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT, 0 }
 854    },
 855
 856    /* 32-bit float formats */
 857    {
 858       { GL_RGBA32F_ARB, 0 },
 859       { PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 860    },
 861    {
 862       { GL_RGB32F_ARB, 0 },
 863       { PIPE_FORMAT_R32G32B32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
 864         PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 865    },
 866    {
 867       { GL_LUMINANCE_ALPHA32F_ARB, 0 },
 868       { PIPE_FORMAT_L32A32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
 869         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 870    },
 871    {
 872       { GL_ALPHA32F_ARB, 0 },
 873       { PIPE_FORMAT_A32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
 874         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_A16_FLOAT,
 875         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 876    },
 877    {
 878       { GL_INTENSITY32F_ARB, 0 },
 879       { PIPE_FORMAT_I32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
 880         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_I16_FLOAT,
 881         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 882    },
 883    {
 884       { GL_LUMINANCE32F_ARB, 0 },
 885       { PIPE_FORMAT_L32_FLOAT, PIPE_FORMAT_L32A32_FLOAT,
 886         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_L16_FLOAT,
 887         PIPE_FORMAT_L16A16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 888    },
 889    {
 890       { GL_R32F, 0 },
 891       { PIPE_FORMAT_R32_FLOAT, PIPE_FORMAT_R32G32_FLOAT,
 892         PIPE_FORMAT_R32G32B32A32_FLOAT, PIPE_FORMAT_R16_FLOAT,
 893         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 894    },
 895    {
 896       { GL_RG32F, 0 },
 897       { PIPE_FORMAT_R32G32_FLOAT, PIPE_FORMAT_R32G32B32A32_FLOAT,
 898         PIPE_FORMAT_R16G16_FLOAT, PIPE_FORMAT_R16G16B16A16_FLOAT, 0 }
 899    },
 900
 901    /* R, RG formats */
 902    {
 903       { GL_RED, GL_R8, 0 },
 904       { PIPE_FORMAT_R8_UNORM, 0 }
 905    },
 906    {
 907       { GL_RG, GL_RG8, 0 },
 908       { PIPE_FORMAT_R8G8_UNORM, 0 }
 909    },
 910    {
 911       { GL_R16, 0 },
 912       { PIPE_FORMAT_R16_UNORM, 0 }
 913    },
 914    {
 915       { GL_RG16, 0 },
 916       { PIPE_FORMAT_R16G16_UNORM, 0 }
 917    },
 918
 919    /* compressed R, RG formats */
 920    {
 921       { GL_COMPRESSED_RED, GL_COMPRESSED_RED_RGTC1, 0 },
 922       { PIPE_FORMAT_RGTC1_UNORM, PIPE_FORMAT_R8_UNORM, 0 }
 923    },
 924    {
 925       { GL_COMPRESSED_SIGNED_RED_RGTC1, 0 },
 926       { PIPE_FORMAT_RGTC1_SNORM, 0 }
 927    },
 928    {
 929       { GL_COMPRESSED_RG, GL_COMPRESSED_RG_RGTC2, 0 },
 930       { PIPE_FORMAT_RGTC2_UNORM, PIPE_FORMAT_R8G8_UNORM, 0 }
 931    },
 932    {
 933       { GL_COMPRESSED_SIGNED_RG_RGTC2, 0 },
 934       { PIPE_FORMAT_RGTC2_SNORM, 0 }
 935    },
 936    {
 937       { GL_COMPRESSED_LUMINANCE, GL_COMPRESSED_LUMINANCE_LATC1_EXT, 0 },
 938       { PIPE_FORMAT_LATC1_UNORM, PIPE_FORMAT_L8_UNORM, 0 }
 939    },
 940    {
 941       { GL_COMPRESSED_SIGNED_LUMINANCE_LATC1_EXT, 0 },
 942       { PIPE_FORMAT_LATC1_SNORM, 0 }
 943    },
 944    {
 945       { GL_COMPRESSED_LUMINANCE_ALPHA, GL_COMPRESSED_LUMINANCE_ALPHA_LATC2_EXT,
 946         GL_COMPRESSED_LUMINANCE_ALPHA_3DC_ATI, 0 },
 947       { PIPE_FORMAT_LATC2_UNORM, PIPE_FORMAT_L8A8_UNORM, 0 }
 948    },
 949    {
 950       { GL_COMPRESSED_SIGNED_LUMINANCE_ALPHA_LATC2_EXT, 0 },
 951       { PIPE_FORMAT_LATC2_SNORM, 0 }
 952    },
 953
 954    /* signed/unsigned integer formats.
 955     * XXX Mesa only has formats for RGBA signed/unsigned integer formats.
 956     * If/when new formats are added this code should be updated.
 957     */
 958    {
 959       { GL_RED_INTEGER_EXT,
 960         GL_GREEN_INTEGER_EXT,
 961         GL_BLUE_INTEGER_EXT,
 962         GL_ALPHA_INTEGER_EXT,
 963         GL_RGB_INTEGER_EXT,
 964         GL_RGBA_INTEGER_EXT,
 965         GL_BGR_INTEGER_EXT,
 966         GL_BGRA_INTEGER_EXT,
 967         GL_LUMINANCE_INTEGER_EXT,
 968         GL_LUMINANCE_ALPHA_INTEGER_EXT,
 969         GL_RGBA8I_EXT,
 970         GL_RGB8I_EXT,
 971         GL_ALPHA8I_EXT,
 972         GL_INTENSITY8I_EXT,
 973         GL_LUMINANCE8I_EXT,
 974         GL_LUMINANCE_ALPHA8I_EXT, 0 },
 975       { PIPE_FORMAT_R8G8B8A8_SSCALED, 0 }
 976    },
 977    {
 978       {
 979          GL_RGBA16I_EXT,
 980          GL_RGB16I_EXT,
 981          GL_ALPHA16I_EXT,
 982          GL_INTENSITY16I_EXT,
 983          GL_LUMINANCE16I_EXT,
 984          GL_LUMINANCE_ALPHA16I_EXT, 0 },
 985       { PIPE_FORMAT_R16G16B16A16_SSCALED, 0 },
 986    },
 987    {
 988       {
 989          GL_RGBA32I_EXT,
 990          GL_RGB32I_EXT,
 991          GL_ALPHA32I_EXT,
 992          GL_INTENSITY32I_EXT,
 993          GL_LUMINANCE32I_EXT,
 994          GL_LUMINANCE_ALPHA32I_EXT, 0 },
 995       { PIPE_FORMAT_R32G32B32A32_SSCALED, 0 }
 996    },
 997    {
 998       {
 999          GL_RGBA8UI_EXT,
1000          GL_RGB8UI_EXT,
1001          GL_ALPHA8UI_EXT,
1002          GL_INTENSITY8UI_EXT,
1003          GL_LUMINANCE8UI_EXT,
1004          GL_LUMINANCE_ALPHA8UI_EXT, 0 },
1005       { PIPE_FORMAT_R8G8B8A8_USCALED, 0 }
1006    },
1007    {
1008       {
1009          GL_RGBA16UI_EXT,
1010          GL_RGB16UI_EXT,
1011          GL_ALPHA16UI_EXT,
1012          GL_INTENSITY16UI_EXT,
1013          GL_LUMINANCE16UI_EXT,
1014          GL_LUMINANCE_ALPHA16UI_EXT, 0 },
1015       { PIPE_FORMAT_R16G16B16A16_USCALED, 0 }
1016    },
1017    {
1018       {
1019          GL_RGBA32UI_EXT,
1020          GL_RGB32UI_EXT,
1021          GL_ALPHA32UI_EXT,
1022          GL_INTENSITY32UI_EXT,
1023          GL_LUMINANCE32UI_EXT,
1024          GL_LUMINANCE_ALPHA32UI_EXT, 0 },
1025       { PIPE_FORMAT_R32G32B32A32_USCALED, 0 }
1026    },
1027
1028    /* signed normalized formats */
1029    {
1030       { GL_RED_SNORM, GL_R8_SNORM, 0 },
1031       { PIPE_FORMAT_R8_SNORM, PIPE_FORMAT_R8G8_SNORM,
1032         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1033    },
1034    {
1035       { GL_R16_SNORM, 0 },
1036       { PIPE_FORMAT_R16_SNORM,
1037         PIPE_FORMAT_R16G16_SNORM,
1038         PIPE_FORMAT_R16G16B16A16_SNORM,
1039         PIPE_FORMAT_R8_SNORM,
1040         PIPE_FORMAT_R8G8_SNORM,
1041         PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1042    },
1043    {
1044       { GL_RG_SNORM, GL_RG8_SNORM, 0 },
1045       { PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1046    },
1047    {
1048       { GL_RG16_SNORM, 0 },
1049       { PIPE_FORMAT_R16G16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1050         PIPE_FORMAT_R8G8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1051    },
1052    {
1053       { GL_RGB_SNORM, GL_RGB8_SNORM, GL_RGBA_SNORM, GL_RGBA8_SNORM, 0 },
1054       { PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1055    },
1056    {
1057       { GL_RGB16_SNORM, GL_RGBA16_SNORM, 0 },
1058       { PIPE_FORMAT_R16G16B16A16_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1059    },
1060    {
1061       { GL_ALPHA_SNORM, GL_ALPHA8_SNORM, 0 },
1062       { PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1063    },
1064    {
1065       { GL_ALPHA16_SNORM, 0 },
1066       { PIPE_FORMAT_A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1067         PIPE_FORMAT_A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1068    },
1069    {
1070       { GL_LUMINANCE_SNORM, GL_LUMINANCE8_SNORM, 0 },
1071       { PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1072    },
1073    {
1074       { GL_LUMINANCE16_SNORM, 0 },
1075       { PIPE_FORMAT_L16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1076         PIPE_FORMAT_L8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1077    },
1078    {
1079       { GL_LUMINANCE_ALPHA_SNORM, GL_LUMINANCE8_ALPHA8_SNORM, 0 },
1080       { PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1081    },
1082    {
1083       { GL_LUMINANCE16_ALPHA16_SNORM, 0 },
1084       { PIPE_FORMAT_L16A16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1085         PIPE_FORMAT_L8A8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1086    },
1087    {
1088       { GL_INTENSITY_SNORM, GL_INTENSITY8_SNORM, 0 },
1089       { PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1090    },
1091    {
1092       { GL_INTENSITY16_SNORM, 0 },
1093       { PIPE_FORMAT_I16_SNORM, PIPE_FORMAT_R16G16B16A16_SNORM,
1094         PIPE_FORMAT_I8_SNORM, PIPE_FORMAT_R8G8B8A8_SNORM, 0 }
1095    },
1096    {
1097       { GL_RGB9_E5, 0 },
1098       { PIPE_FORMAT_R9G9B9E5_FLOAT, 0 }
1099    },
1100    {
1101       { GL_R11F_G11F_B10F, 0 },
1102       { PIPE_FORMAT_R11G11B10_FLOAT, 0 }
1103    }
1104 };
1105
1106
1107 /**
1108  * Return first supported format from the given list.
1109  */
1110 static enum pipe_format
1111 find_supported_format(struct pipe_screen *screen,
1112                       const enum pipe_format formats[],
1113                       enum pipe_texture_target target,
1114                       unsigned sample_count,
1115                       unsigned tex_usage)
1116 {
1117    uint i;
1118    for (i = 0; formats[i]; i++) {
1119       if (screen->is_format_supported(screen, formats[i], target,
1120                                       sample_count, tex_usage)) {
1121          return formats[i];
1122       }
1123    }
1124    return PIPE_FORMAT_NONE;
1125 }
1126
1127 struct exact_format_mapping
1128 {
1129    GLenum format;
1130    GLenum type;
1131    enum pipe_format pformat;
1132 };
1133
1134 static const struct exact_format_mapping rgba8888_tbl[] =
1135 {
1136    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8B8G8R8_UNORM },
1137    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_A8B8G8R8_UNORM },
1138    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8A8_UNORM },
1139    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8A8_UNORM },
1140    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_A8R8G8B8_UNORM },
1141    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8A8_UNORM },
1142    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8A8_UNORM },
1143    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_A8B8G8R8_UNORM },
1144    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8A8_UNORM },
1145    { 0,           0,                              0                          }
1146 };
1147
1148 static const struct exact_format_mapping rgbx8888_tbl[] =
1149 {
1150    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8R8G8B8_UNORM },
1151    { GL_BGRA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_B8G8R8X8_UNORM },
1152    { GL_BGRA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_B8G8R8X8_UNORM },
1153    /* No Mesa formats for these Gallium formats:
1154    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_X8B8G8R8_UNORM },
1155    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_X8B8G8R8_UNORM },
1156    { GL_RGBA,     GL_UNSIGNED_INT_8_8_8_8_REV,    PIPE_FORMAT_R8G8B8X8_UNORM },
1157    { GL_ABGR_EXT, GL_UNSIGNED_INT_8_8_8_8,        PIPE_FORMAT_R8G8B8X8_UNORM },
1158    { GL_RGBA,     GL_UNSIGNED_BYTE,               PIPE_FORMAT_R8G8B8X8_UNORM },
1159    { GL_ABGR_EXT, GL_UNSIGNED_BYTE,               PIPE_FORMAT_X8B8G8R8_UNORM },
1160    */
1161    { 0,           0,                              0                          }
1162 };
1163
1164 static const struct exact_format_mapping rgba1010102_tbl[] =
1165 {
1166    { GL_BGRA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_B10G10R10A2_UNORM },
1167    /* No Mesa formats for these Gallium formats:
1168    { GL_RGBA,     GL_UNSIGNED_INT_2_10_10_10_REV, PIPE_FORMAT_R10G10B10A2_UNORM },
1169    { GL_ABGR_EXT, GL_UNSIGNED_INT_10_10_10_2,     PIPE_FORMAT_R10G10B10A2_UNORM },
1170    { GL_ABGR_EXT, GL_UNSIGNED_INT,                PIPE_FORMAT_R10G10B10A2_UNORM },
1171    */
1172    { 0,           0,                              0                             }
1173 };
1174
1175 /**
1176  * If there is an exact pipe_format match for {internalFormat, format, type}
1177  * return that, otherwise return PIPE_FORMAT_NONE so we can do fuzzy matching.
1178  */
1179 static enum pipe_format
1180 find_exact_format(GLint internalFormat, GLenum format, GLenum type)
1181 {
1182    uint i;
1183    const struct exact_format_mapping* tbl;
1184
1185    if (format == GL_NONE || type == GL_NONE)
1186       return PIPE_FORMAT_NONE;
1187
1188    switch (internalFormat) {
1189    case 4:
1190    case GL_RGBA:
1191    case GL_RGBA8:
1192       tbl = rgba8888_tbl;
1193       break;
1194    case 3:
1195    case GL_RGB:
1196    case GL_RGB8:
1197       tbl = rgbx8888_tbl;
1198       break;
1199    case GL_RGB10_A2:
1200       tbl = rgba1010102_tbl;
1201       break;
1202    default:
1203       return PIPE_FORMAT_NONE;
1204    }
1205
1206    for (i = 0; tbl[i].format; i++)
1207       if (tbl[i].format == format && tbl[i].type == type)
1208          return tbl[i].pformat;
1209
1210    return PIPE_FORMAT_NONE;
1211 }
1212
1213 /**
1214  * Given an OpenGL internalFormat value for a texture or surface, return
1215  * the best matching PIPE_FORMAT_x, or PIPE_FORMAT_NONE if there's no match.
1216  * This is called during glTexImage2D, for example.
1217  *
1218  * The bindings parameter typically has PIPE_BIND_SAMPLER_VIEW set, plus
1219  * either PIPE_BINDING_RENDER_TARGET or PIPE_BINDING_DEPTH_STENCIL if
1220  * we want render-to-texture ability.
1221  *
1222  * \param internalFormat  the user value passed to glTexImage2D
1223  * \param target  one of PIPE_TEXTURE_x
1224  * \param bindings  bitmask of PIPE_BIND_x flags.
1225  */
1226 enum pipe_format
1227 st_choose_format(struct pipe_screen *screen, GLenum internalFormat,
1228                  GLenum format, GLenum type,
1229                  enum pipe_texture_target target, unsigned sample_count,
1230                  unsigned bindings)
1231 {
1232    GET_CURRENT_CONTEXT(ctx); /* XXX this should be a function parameter */
1233    int i, j;
1234    enum pipe_format pf;
1235
1236    /* can't render to compressed formats at this time */
1237    if (_mesa_is_compressed_format(ctx, internalFormat)
1238        && (bindings & ~PIPE_BIND_SAMPLER_VIEW)) {
1239       return PIPE_FORMAT_NONE;
1240    }
1241
1242    /* search for exact matches */
1243    pf = find_exact_format(internalFormat, format, type);
1244    if (pf != PIPE_FORMAT_NONE &&
1245        screen->is_format_supported(screen, pf,
1246                                    target, sample_count, bindings))
1247       return pf;
1248
1249    /* search table for internalFormat */
1250    for (i = 0; i < Elements(format_map); i++) {
1251       const struct format_mapping *mapping = &format_map[i];
1252       for (j = 0; mapping->glFormats[j]; j++) {
1253          if (mapping->glFormats[j] == internalFormat) {
1254             /* Found the desired internal format.  Find first pipe format
1255              * which is supported by the driver.
1256              */
1257             return find_supported_format(screen, mapping->pipeFormats,
1258                                          target, sample_count, bindings);
1259          }
1260       }
1261    }
1262
1263    _mesa_problem(NULL, "unhandled format!\n");
1264    return PIPE_FORMAT_NONE;
1265 }
1266
1267
1268 /**
1269  * Called by FBO code to choose a PIPE_FORMAT_ for drawing surfaces.
1270  */
1271 enum pipe_format
1272 st_choose_renderbuffer_format(struct pipe_screen *screen,
1273                               GLenum internalFormat, unsigned sample_count)
1274 {
1275    uint usage;
1276    if (_mesa_is_depth_or_stencil_format(internalFormat))
1277       usage = PIPE_BIND_DEPTH_STENCIL;
1278    else
1279       usage = PIPE_BIND_RENDER_TARGET;
1280    return st_choose_format(screen, internalFormat, GL_NONE, GL_NONE, PIPE_TEXTURE_2D,
1281                            sample_count, usage);
1282 }
1283
1284
1285 gl_format
1286 st_ChooseTextureFormat_renderable(struct gl_context *ctx, GLint internalFormat,
1287                                   GLenum format, GLenum type, GLboolean renderable)
1288 {
1289    struct pipe_screen *screen = st_context(ctx)->pipe->screen;
1290    enum pipe_format pFormat;
1291    uint bindings;
1292
1293    (void) format;
1294    (void) type;
1295
1296    /* GL textures may wind up being render targets, but we don't know
1297     * that in advance.  Specify potential render target flags now.
1298     */
1299    bindings = PIPE_BIND_SAMPLER_VIEW;
1300    if (renderable) {
1301       if (_mesa_is_depth_or_stencil_format(internalFormat))
1302          bindings |= PIPE_BIND_DEPTH_STENCIL;
1303       else
1304          bindings |= PIPE_BIND_RENDER_TARGET;
1305    }
1306
1307    pFormat = st_choose_format(screen, internalFormat, format, type,
1308                               PIPE_TEXTURE_2D, 0, bindings);
1309
1310    if (pFormat == PIPE_FORMAT_NONE) {
1311       /* try choosing format again, this time without render target bindings */
1312       pFormat = st_choose_format(screen, internalFormat, format, type,
1313                                  PIPE_TEXTURE_2D, 0, PIPE_BIND_SAMPLER_VIEW);
1314    }
1315
1316    if (pFormat == PIPE_FORMAT_NONE) {
1317       /* no luck at all */
1318       return MESA_FORMAT_NONE;
1319    }
1320
1321    return st_pipe_format_to_mesa_format(pFormat);
1322 }
1323
1324
1325 /**
1326  * Called via ctx->Driver.ChooseTextureFormat().
1327  */
1328 gl_format
1329 st_ChooseTextureFormat(struct gl_context *ctx, GLint internalFormat,
1330                        GLenum format, GLenum type)
1331 {
1332    boolean want_renderable =
1333       internalFormat == 3 || internalFormat == 4 ||
1334       internalFormat == GL_RGB || internalFormat == GL_RGBA ||
1335       internalFormat == GL_RGB8 || internalFormat == GL_RGBA8 ||
1336       internalFormat == GL_BGRA;
1337
1338    return st_ChooseTextureFormat_renderable(ctx, internalFormat,
1339                                             format, type, want_renderable);
1340 }
1341
1342 /**
1343  * Test if a gallium format is equivalent to a GL format/type.
1344  */
1345 GLboolean
1346 st_equal_formats(enum pipe_format pFormat, GLenum format, GLenum type)
1347 {
1348    switch (pFormat) {
1349    case PIPE_FORMAT_A8B8G8R8_UNORM:
1350       return format == GL_RGBA && type == GL_UNSIGNED_BYTE;
1351    case PIPE_FORMAT_A8R8G8B8_UNORM:
1352       return format == GL_BGRA && type == GL_UNSIGNED_BYTE;
1353    case PIPE_FORMAT_B5G6R5_UNORM:
1354       return format == GL_RGB && type == GL_UNSIGNED_SHORT_5_6_5;
1355    /* XXX more combos... */
1356    default:
1357       return GL_FALSE;
1358    }
1359 }
1360
1361 GLboolean
1362 st_sampler_compat_formats(enum pipe_format format1, enum pipe_format format2)
1363 {
1364    if (format1 == format2)
1365       return GL_TRUE;
1366
1367    if (format1 == PIPE_FORMAT_B8G8R8A8_UNORM &&
1368        format2 == PIPE_FORMAT_B8G8R8X8_UNORM)
1369       return GL_TRUE;
1370
1371    if (format1 == PIPE_FORMAT_B8G8R8X8_UNORM &&
1372        format2 == PIPE_FORMAT_B8G8R8A8_UNORM)
1373       return GL_TRUE;
1374
1375    if (format1 == PIPE_FORMAT_A8B8G8R8_UNORM &&
1376        format2 == PIPE_FORMAT_X8B8G8R8_UNORM)
1377       return GL_TRUE;
1378
1379    if (format1 == PIPE_FORMAT_X8B8G8R8_UNORM &&
1380        format2 == PIPE_FORMAT_A8B8G8R8_UNORM)
1381       return GL_TRUE;
1382
1383    if (format1 == PIPE_FORMAT_A8R8G8B8_UNORM &&
1384        format2 == PIPE_FORMAT_X8R8G8B8_UNORM)
1385       return GL_TRUE;
1386
1387    if (format1 == PIPE_FORMAT_X8R8G8B8_UNORM &&
1388        format2 == PIPE_FORMAT_A8R8G8B8_UNORM)
1389       return GL_TRUE;
1390
1391    return GL_FALSE;
1392 }
1393
1394
1395
1396 /**
1397  * This is used for translating texture border color and the clear
1398  * color.  For example, the clear color is interpreted according to
1399  * the renderbuffer's base format.  For example, if clearing a
1400  * GL_LUMINANCE buffer, ClearColor[0] = luminance and ClearColor[1] =
1401  * alpha.  Similarly for texture border colors.
1402  */
1403 void
1404 st_translate_color(const GLfloat colorIn[4], GLenum baseFormat,
1405                    GLfloat colorOut[4])
1406 {
1407    switch (baseFormat) {
1408    case GL_RED:
1409       colorOut[0] = colorIn[0];
1410       colorOut[1] = 0.0F;
1411       colorOut[2] = 0.0F;
1412       colorOut[3] = 1.0F;
1413       break;
1414    case GL_RG:
1415       colorOut[0] = colorIn[0];
1416       colorOut[1] = colorIn[1];
1417       colorOut[2] = 0.0F;
1418       colorOut[3] = 1.0F;
1419       break;
1420    case GL_RGB:
1421       colorOut[0] = colorIn[0];
1422       colorOut[1] = colorIn[1];
1423       colorOut[2] = colorIn[2];
1424       colorOut[3] = 1.0F;
1425       break;
1426    case GL_ALPHA:
1427       colorOut[0] = colorOut[1] = colorOut[2] = 0.0;
1428       colorOut[3] = colorIn[3];
1429       break;
1430    case GL_LUMINANCE:
1431       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
1432       colorOut[3] = 1.0;
1433       break;
1434    case GL_LUMINANCE_ALPHA:
1435       colorOut[0] = colorOut[1] = colorOut[2] = colorIn[0];
1436       colorOut[3] = colorIn[3];
1437       break;
1438    case GL_INTENSITY:
1439       colorOut[0] = colorOut[1] = colorOut[2] = colorOut[3] = colorIn[0];
1440       break;
1441    default:
1442       COPY_4V(colorOut, colorIn);
1443    }
1444 }