gfxTextureManager.cpp 37.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//-----------------------------------------------------------------------------

#include "platform/platform.h"
#include "gfx/gfxTextureManager.h"

#include "gfx/gfxDevice.h"
#include "gfx/gfxCardProfile.h"
#include "gfx/gfxStringEnumTranslate.h"
#include "gfx/bitmap/ddsUtils.h"
#include "core/strings/stringFunctions.h"
#include "core/util/safeDelete.h"
#include "core/resourceManager.h"
#include "core/volume.h"
#include "core/util/dxt5nmSwizzle.h"
#include "console/consoleTypes.h"
#include "console/engineAPI.h"


//#define DEBUG_SPEW


S32 GFXTextureManager::smTextureReductionLevel = 0;

44 45 46 47
String GFXTextureManager::smMissingTexturePath("core/art/missingTexture");
String GFXTextureManager::smUnavailableTexturePath("core/art/unavailable");
String GFXTextureManager::smWarningTexturePath("core/art/warnmat");

48 49 50 51 52 53 54 55 56 57 58
GFXTextureManager::EventSignal GFXTextureManager::smEventSignal;

static const String  sDDSExt( "dds" );

void GFXTextureManager::init()
{
   Con::addVariable( "$pref::Video::textureReductionLevel", TypeS32, &smTextureReductionLevel,
      "The number of mipmap levels to drop on loaded textures to reduce "
      "video memory usage.  It will skip any textures that have been defined "
      "as not allowing down scaling.\n"
      "@ingroup GFX\n" );
59

60
   Con::addVariable( "$pref::Video::missingTexturePath", TypeRealString, &smMissingTexturePath,
61 62 63
      "The file path of the texture to display when the requested texture is missing.\n"
      "@ingroup GFX\n" );

64
   Con::addVariable( "$pref::Video::unavailableTexturePath", TypeRealString, &smUnavailableTexturePath,
65 66 67 68
      "@brief The file path of the texture to display when the requested texture is unavailable.\n\n"
      "Often this texture is used by GUI controls to indicate that the request image is unavailable.\n"
      "@ingroup GFX\n" );

69
   Con::addVariable( "$pref::Video::warningTexturePath", TypeRealString, &smWarningTexturePath,
70 71
      "The file path of the texture used to warn the developer.\n"
      "@ingroup GFX\n" );
72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246
}

GFXTextureManager::GFXTextureManager()
{
   mListHead = mListTail = NULL;
   mTextureManagerState = GFXTextureManager::Living;

   // Set up the hash table
   mHashCount = 1023;
   mHashTable = new GFXTextureObject *[mHashCount];
   for(U32 i = 0; i < mHashCount; i++)
      mHashTable[i] = NULL;
}

GFXTextureManager::~GFXTextureManager()
{
   if( mHashTable )
      SAFE_DELETE_ARRAY( mHashTable );

   mCubemapTable.clear();
}

U32 GFXTextureManager::getTextureDownscalePower( GFXTextureProfile *profile )
{
   if ( !profile || profile->canDownscale() )
      return smTextureReductionLevel;

   return 0;
}

bool GFXTextureManager::validateTextureQuality( GFXTextureProfile *profile, U32 &width, U32 &height )
{
   U32 scaleFactor = getTextureDownscalePower( profile );
   if ( scaleFactor == 0 )
      return true;

   // Otherwise apply the appropriate scale...
   width  >>= scaleFactor;
   height >>= scaleFactor;

   return true;
}

void GFXTextureManager::kill()
{
   AssertFatal( mTextureManagerState != GFXTextureManager::Dead, "Texture Manager already killed!" );

   // Release everything in the cache we can
   // so we don't leak any textures.
   cleanupCache();

   GFXTextureObject *curr = mListHead;
   GFXTextureObject *temp;

   // Actually delete all the textures we know about.
   while( curr != NULL ) 
   {
      temp = curr->mNext;
      curr->kill();
      curr = temp;
   }

   mCubemapTable.clear();

   mTextureManagerState = GFXTextureManager::Dead;
}

void GFXTextureManager::zombify()
{
   AssertFatal( mTextureManagerState != GFXTextureManager::Zombie, "Texture Manager already a zombie!" );

   // Notify everyone that cares about the zombification!
   smEventSignal.trigger( GFXZombify );

   // Release unused pool textures.
   cleanupPool();

   // Release everything in the cache we can.
   cleanupCache();

   // Free all the device copies of the textures.
   GFXTextureObject *temp = mListHead;
   while( temp != NULL ) 
   {
      freeTexture( temp, true );
      temp = temp->mNext;
   }

   // Finally, note our state.
   mTextureManagerState = GFXTextureManager::Zombie;
}

void GFXTextureManager::resurrect()
{
   // Reupload all the device copies of the textures.
   GFXTextureObject *temp = mListHead;

   while( temp != NULL ) 
   {
      refreshTexture( temp );
      temp = temp->mNext;
   }

   // Notify callback registries.
   smEventSignal.trigger( GFXResurrect );
   
   // Update our state.
   mTextureManagerState = GFXTextureManager::Living;
}

void GFXTextureManager::cleanupPool()
{
   PROFILE_SCOPE( GFXTextureManager_CleanupPool );

   TexturePoolMap::Iterator iter = mTexturePool.begin();
   for ( ; iter != mTexturePool.end(); )
   {
      if ( iter->value->getRefCount() == 1 )
      {
         // This texture is unreferenced, so take the time
         // now to completely remove it from the pool.
         TexturePoolMap::Iterator unref = iter;
         iter++;
         unref->value = NULL;
         mTexturePool.erase( unref );
         continue;
      }

      iter++;
   }
}

void GFXTextureManager::requestDeleteTexture( GFXTextureObject *texture )
{
   // If this is a non-cached texture then just really delete it.
   if ( texture->mTextureLookupName.isEmpty() )
   {
      delete texture;
      return;
   }

   // Set the time and store it.
   texture->mDeleteTime = Platform::getTime();
   mToDelete.push_back_unique( texture );
}

void GFXTextureManager::cleanupCache( U32 secondsToLive )
{
   PROFILE_SCOPE( GFXTextureManager_CleanupCache );

   U32 killTime = Platform::getTime() - secondsToLive;

   for ( U32 i=0; i < mToDelete.size(); )
   {
      GFXTextureObject *tex = mToDelete[i];

      // If the texture was picked back up by a user
      // then just remove it from the list.
      if ( tex->getRefCount() != 0 )
      {
         mToDelete.erase_fast( i );
         continue;
      }

      // If its time has expired delete it for real.
      if ( tex->mDeleteTime <= killTime )
      {
         //Con::errorf( "Killed texture: %s", tex->mTextureLookupName.c_str() );
         delete tex;
         mToDelete.erase_fast( i );
         continue;
      }

      i++;
   }
}

GFXTextureObject *GFXTextureManager::_lookupTexture( const char *hashName, const GFXTextureProfile *profile  )
{
   GFXTextureObject *ret = hashFind( hashName );

   // TODO: Profile checking HERE

   return ret;
}

GFXTextureObject *GFXTextureManager::_lookupTexture( const DDSFile *ddsFile, const GFXTextureProfile *profile )
{
   if( ddsFile->getTextureCacheString().isNotEmpty() )
   {
      // Call _lookupTexture()
      return _lookupTexture( ddsFile->getTextureCacheString(), profile );
   }

   return NULL;
}

GFXTextureObject *GFXTextureManager::createTexture( GBitmap *bmp, const String &resourceName, GFXTextureProfile *profile, bool deleteBmp )
{
   AssertFatal(bmp, "GFXTextureManager::createTexture() - Got NULL bitmap!");

   GFXTextureObject *cacheHit = _lookupTexture( resourceName, profile );
   if( cacheHit != NULL)
   {
      // Con::errorf("Cached texture '%s'", (resourceName.isNotEmpty() ? resourceName.c_str() : "unknown"));
      if (deleteBmp)
         delete bmp;
      return cacheHit;
   }

   return _createTexture( bmp, resourceName, profile, deleteBmp, NULL );
}

GFXTextureObject *GFXTextureManager::_createTexture(  GBitmap *bmp, 
                                                      const String &resourceName, 
                                                      GFXTextureProfile *profile, 
                                                      bool deleteBmp,
                                                      GFXTextureObject *inObj )
{
   PROFILE_SCOPE( GFXTextureManager_CreateTexture_Bitmap );
   
   #ifdef DEBUG_SPEW
   Platform::outputDebugString( "[GFXTextureManager] _createTexture (GBitmap) '%s'",
      resourceName.c_str()
   );
   #endif

   // Massage the bitmap based on any resize rules.
   U32 scalePower = getTextureDownscalePower( profile );

   GBitmap *realBmp = bmp;
   U32 realWidth = bmp->getWidth();
   U32 realHeight = bmp->getHeight();

   if (  scalePower && 
         isPow2(bmp->getWidth()) && 
         isPow2(bmp->getHeight()) && 
         profile->canDownscale() )
   {
      // We only work with power of 2 textures for now, so we 
      // don't have to worry about padding.

      // We downscale the bitmap on the CPU... this is the reason
      // you should be using DDS which already has good looking mips.
      GBitmap *padBmp = bmp;
      padBmp->extrudeMipLevels();
      scalePower = getMin( scalePower, padBmp->getNumMipLevels() - 1 );

      realWidth  = getMax( (U32)1, padBmp->getWidth() >> scalePower );
      realHeight = getMax( (U32)1, padBmp->getHeight() >> scalePower );
      realBmp = new GBitmap( realWidth, realHeight, false, bmp->getFormat() );

      // Copy to the new bitmap...
      dMemcpy( realBmp->getWritableBits(), 
               padBmp->getBits(scalePower),
               padBmp->getBytesPerPixel() * realWidth * realHeight );

      // This line is commented out because createPaddedBitmap is commented out.
      // If that line is added back in, this line should be added back in.
      // delete padBmp;
   }

   // Call the internal create... (use the real* variables now, as they
   // reflect the reality of the texture we are creating.)
   U32 numMips = 0;
   GFXFormat realFmt = realBmp->getFormat();
   _validateTexParams( realWidth, realHeight, profile, numMips, realFmt );

   GFXTextureObject *ret;
   if ( inObj )
   {
      // If the texture has changed in dimensions 
      // then we need to recreate it.
      if (  inObj->getWidth() != realWidth ||
            inObj->getHeight() != realHeight ||
            inObj->getFormat() != realFmt )
         ret = _createTextureObject( realHeight, realWidth, 0, realFmt, profile, numMips, false, 0, inObj );
      else
         ret = inObj;
   }
   else
      ret = _createTextureObject(realHeight, realWidth, 0, realFmt, profile, numMips );

   if(!ret)
   {
      Con::errorf("GFXTextureManager - failed to create texture (1) for '%s'", (resourceName.isNotEmpty() ? resourceName.c_str() : "unknown"));
      return NULL;
   }

   // Extrude mip levels
   // Don't do this for fonts!
   if( ret->mMipLevels > 1 && ( realBmp->getNumMipLevels() == 1 ) && ( realBmp->getFormat() != GFXFormatA8 ) &&
      isPow2( realBmp->getHeight() ) && isPow2( realBmp->getWidth() ) && !profile->noMip() )
   {
      // NOTE: This should really be done by extruding mips INTO a DDS file instead
      // of modifying the gbitmap
      realBmp->extrudeMipLevels(false); 
   }

   // If _validateTexParams kicked back a different format, than there needs to be
   // a conversion
   DDSFile *bmpDDS = NULL;
   if( realBmp->getFormat() != realFmt )
   {
      const GFXFormat oldFmt = realBmp->getFormat();

      // TODO: Set it up so that ALL format conversions use DDSFile. Rip format
      // switching out of GBitmap entirely.
      if( !realBmp->setFormat( realFmt ) )
      {
         // This is not the ideal implementation...
         bmpDDS = DDSFile::createDDSFileFromGBitmap( realBmp );

         bool convSuccess = false;

         if( bmpDDS != NULL )
         {       
            // This shouldn't live here, I don't think
            switch( realFmt )
            {
               case GFXFormatDXT1:
               case GFXFormatDXT2:
               case GFXFormatDXT3:
               case GFXFormatDXT4:
               case GFXFormatDXT5:
                  // If this is a Normal Map profile, than the data needs to be conditioned
                  // to use the swizzle trick
                  if( ret->mProfile->getType() == GFXTextureProfile::NormalMap )
                  {
                     PROFILE_START(DXT_DXTNMSwizzle);
                     static DXT5nmSwizzle sDXT5nmSwizzle;
                     DDSUtil::swizzleDDS( bmpDDS, sDXT5nmSwizzle );
                     PROFILE_END();
                  }

                  convSuccess = DDSUtil::squishDDS( bmpDDS, realFmt );
                  break;
               default:
                  AssertFatal(false, "Attempting to convert to a non-DXT format");
                  break;
            }
         }

         if( !convSuccess )
         {
            Con::errorf( "[GFXTextureManager]: Failed to change source format from %s to %s. Cannot create texture.", 
               GFXStringTextureFormat[oldFmt], GFXStringTextureFormat[realFmt] );
            delete bmpDDS;

            return NULL;
         }
      }
#ifdef TORQUE_DEBUG
      else
      {
         //Con::warnf( "[GFXTextureManager]: Changed bitmap format from %s to %s.", 
         //   GFXStringTextureFormat[oldFmt], GFXStringTextureFormat[realFmt] );
      }
#endif
   }

   // Call the internal load...
   if( ( bmpDDS == NULL && !_loadTexture( ret, realBmp ) ) || // If we aren't doing a DDS format change, use bitmap load
       ( bmpDDS != NULL && !_loadTexture( ret, bmpDDS ) ) )   // If there is a DDS, than load that instead. A format change took place.
   {
      Con::errorf("GFXTextureManager - failed to load GBitmap for '%s'", (resourceName.isNotEmpty() ? resourceName.c_str() : "unknown"));
      return NULL;
   }

   // Do statistics and book-keeping...
   
   //    - info for the texture...
   ret->mTextureLookupName = resourceName;
   ret->mBitmapSize.set(realWidth, realHeight,0);

#ifdef TORQUE_DEBUG
   if (resourceName.isNotEmpty())
      ret->mDebugDescription = resourceName;
   else
      ret->mDebugDescription = "Anonymous Texture Object";

#endif

   if(profile->doStoreBitmap())
   {
      // NOTE: may store a downscaled copy!
      SAFE_DELETE( ret->mBitmap );
      SAFE_DELETE( ret->mDDS );

      if( bmpDDS == NULL )
         ret->mBitmap = new GBitmap( *realBmp );
      else
         ret->mDDS = bmpDDS;
   }
   else
   {
      // Delete the DDS if we made one
      SAFE_DELETE( bmpDDS );
   }

   if ( !inObj )
      _linkTexture( ret );

   //    - output debug info?
   // Save texture for debug purpose
   //   static int texId = 0;
   //   char buff[256];
   //   dSprintf(buff, sizeof(buff), "tex_%d", texId++);
   //   bmp->writePNGDebug(buff);
   //   texId++;

   // Before we delete the bitmap save our transparency flag
   ret->mHasTransparency = realBmp->getHasTransparency();

   // Some final cleanup...
   if(realBmp != bmp)
      SAFE_DELETE(realBmp);
   if (deleteBmp)
      SAFE_DELETE(bmp);

   // Return the new texture!
   return ret;
}

GFXTextureObject *GFXTextureManager::createTexture( DDSFile *dds, GFXTextureProfile *profile, bool deleteDDS )
{
   AssertFatal(dds, "GFXTextureManager::createTexture() - Got NULL dds!");

   // Check the cache first...
   GFXTextureObject *cacheHit = _lookupTexture( dds, profile );
   if ( cacheHit )
   {
      //      Con::errorf("Cached texture '%s'", (fileName.isNotEmpty() ? fileName.c_str() : "unknown"));
      if( deleteDDS )
         delete dds;

      return cacheHit;
   }

   return _createTexture( dds, profile, deleteDDS, NULL );
}

GFXTextureObject *GFXTextureManager::_createTexture(  DDSFile *dds,
                                                      GFXTextureProfile *profile,
                                                      bool deleteDDS,
                                                      GFXTextureObject *inObj )
{
   PROFILE_SCOPE( GFXTextureManager_CreateTexture_DDS );

   const char *fileName = dds->getTextureCacheString();
   if( !fileName )
      fileName = "unknown";

   #ifdef DEBUG_SPEW
   Platform::outputDebugString( "[GFXTextureManager] _createTexture (DDS) '%s'",
      fileName
   );
   #endif

   // Ignore padding from the profile.
   U32 numMips = dds->mMipMapCount;
   GFXFormat fmt = dds->mFormat;
   _validateTexParams( dds->getHeight(), dds->getWidth(), profile, numMips, fmt );

   if( fmt != dds->mFormat )
   {
      Con::errorf( "GFXTextureManager - failed to validate texture parameters for DDS file '%s'", fileName );
      return NULL;
   }

   // Call the internal create... (use the real* variables now, as they
   // reflect the reality of the texture we are creating.)

   GFXTextureObject *ret;
   if ( inObj )
   {
      // If the texture has changed in dimensions 
      // then we need to recreate it.   
      if (  inObj->getWidth() != dds->getWidth() ||
            inObj->getHeight() != dds->getHeight() ||
            inObj->getFormat() != fmt ||
            inObj->getMipLevels() != numMips )
         ret = _createTextureObject(   dds->getHeight(), dds->getWidth(), 0, 
                                       fmt, profile, numMips, 
                                       true, 0, inObj );
      else
         ret = inObj;
   }
   else
      ret =  _createTextureObject(  dds->getHeight(), dds->getWidth(), 0, 
                                    fmt, profile, numMips, true );


   if(!ret)
   {
      Con::errorf("GFXTextureManager - failed to create texture (1) for '%s' DDSFile.", fileName);
      return NULL;
   }

   // Call the internal load...
   if(!_loadTexture(ret, dds))
   {
      Con::errorf("GFXTextureManager - failed to load DDS for '%s'", fileName);
      return NULL;
   }

   // Do statistics and book-keeping...

   //    - info for the texture...
   ret->mTextureLookupName = dds->getTextureCacheString();
   ret->mBitmapSize.set( dds->mWidth, dds->mHeight, 0 );

#ifdef TORQUE_DEBUG
   ret->mDebugDescription = fileName;
#endif

   if(profile->doStoreBitmap())
   {
      // NOTE: may store a downscaled copy!
      SAFE_DELETE( ret->mBitmap );
      SAFE_DELETE( ret->mDDS );

      ret->mDDS = new DDSFile( *dds );
   }

   if ( !inObj )
      _linkTexture( ret );

   //    - output debug info?
   // Save texture for debug purpose
   //   static int texId = 0;
   //   char buff[256];
   //   dSprintf(buff, sizeof(buff), "tex_%d", texId++);
   //   bmp->writePNGDebug(buff);
   //   texId++;

   // Save our transparency flag
   ret->mHasTransparency = dds->getHasTransparency();

   if( deleteDDS )
      delete dds;

   // Return the new texture!
   return ret;
}

GFXTextureObject *GFXTextureManager::createTexture( const Torque::Path &path, GFXTextureProfile *profile )
{
   PROFILE_SCOPE( GFXTextureManager_createTexture );
   
   // Resource handles used for loading.  Hold on to them
   // throughout this function so that change notifications
   // don't get added, then removed, and then re-added.
   
   Resource< DDSFile > dds;
   Resource< GBitmap > bitmap;
   
   // We need to handle path's that have had "incorrect"
   // extensions parsed out of the file name
   Torque::Path correctPath = path;

   bool textureExt = false;

   // Easiest case to handle is when there isn't an extension
   if (path.getExtension().isEmpty())
      textureExt = true;

   // Since "dds" isn't registered with GBitmap currently we
   // have to test it separately
   if (sDDSExt.equal( path.getExtension(), String::NoCase ) )
      textureExt = true;

   // Now loop through the rest of the GBitmap extensions
   // to see if we have any matches
   for ( U32 i = 0; i < GBitmap::sRegistrations.size(); i++ )
   {
      // If we have gotten a match (either in this loop or before)
      // then we can exit
      if (textureExt)
         break;

      const GBitmap::Registration   &reg = GBitmap::sRegistrations[i];
      const Vector<String>          &extensions = reg.extensions;

      for ( U32 j = 0; j < extensions.size(); ++j )
      {    
         if ( extensions[j].equal( path.getExtension(), String::NoCase ) )
         {
            // Found a valid texture extension
            textureExt = true;
            break;
         }
      }
   }

   // If we didn't find a valid texture extension then assume that
   // the parsed out "extension" was actually intended to be part of
   // the texture name so add it back
   if (!textureExt)
   {
      correctPath.setFileName( Torque::Path::Join( path.getFileName(), '.', path.getExtension() ) );
      correctPath.setExtension( String::EmptyString );
   }

   // Check the cache first...
   String pathNoExt = Torque::Path::Join( correctPath.getRoot(), ':', correctPath.getPath() );
   pathNoExt = Torque::Path::Join( pathNoExt, '/', correctPath.getFileName() );

   GFXTextureObject *retTexObj = _lookupTexture( pathNoExt, profile );
   if( retTexObj )
      return retTexObj;

   const U32 scalePower = getTextureDownscalePower( profile );

   // If this is a valid file (has an extension) than load it
   Path realPath;
   if( Torque::FS::IsFile( correctPath ) )
   {
      // Check for DDS
      if( sDDSExt.equal(correctPath.getExtension(), String::NoCase ) )
      {
         dds = DDSFile::load( correctPath, scalePower );
         if( dds != NULL )
         {
            realPath = dds.getPath();
            retTexObj = createTexture( dds, profile, false );
         }
      }
      else // Let GBitmap take care of it
      {
         bitmap = GBitmap::load( correctPath );
         if( bitmap != NULL )
         {
            realPath = bitmap.getPath();
            retTexObj = createTexture( bitmap, pathNoExt, profile, false );
         }
      }      
   }
   else
   {
      // NOTE -- We should probably remove the code from GBitmap that tries different
      // extensions for things GBitmap loads, and move it here. I think it should
      // be a bit more involved than just a list of extensions. Some kind of 
      // extension registration thing, maybe.

      // Check to see if there is a .DDS file with this name (if no extension is provided)
      Torque::Path tryDDSPath = pathNoExt;
      if( tryDDSPath.getExtension().isNotEmpty() )
         tryDDSPath.setFileName( tryDDSPath.getFullFileName() );
      tryDDSPath.setExtension( sDDSExt );

      if( Torque::FS::IsFile( tryDDSPath ) )
      {
         dds = DDSFile::load( tryDDSPath, scalePower );
         if( dds != NULL )
         {
            realPath = dds.getPath();
            retTexObj = createTexture( dds, profile, false );
         }
      }
      
      // Otherwise, retTexObj stays NULL, and fall through to the generic GBitmap
      // load.
   }

   // If we still don't have a texture object yet, feed the correctPath to GBitmap and
   // it will try a bunch of extensions
   if( retTexObj == NULL )
   {
      // Find and load the texture.
      bitmap = GBitmap::load( correctPath );

      if ( bitmap != NULL )
      {
         realPath = bitmap.getPath();
         retTexObj = createTexture( bitmap, pathNoExt, profile, false );
      }
   }

   if ( retTexObj )
   {
      // Store the path for later use.
      retTexObj->mPath = realPath;

      // Register the texture file for change notifications.
      FS::AddChangeNotification( retTexObj->getPath(), this, &GFXTextureManager::_onFileChanged );
   }

   // Could put in a final check for 'retTexObj == NULL' here as an error message.

   return retTexObj;
}

GFXTextureObject *GFXTextureManager::createTexture(  U32 width, U32 height, void *pixels, GFXFormat format, GFXTextureProfile *profile )
{
   // For now, stuff everything into a GBitmap and pass it off... This may need to be revisited -- BJG
   GBitmap *bmp = new GBitmap(width, height, 0, format);
   dMemcpy(bmp->getWritableBits(), pixels, width * height * bmp->getBytesPerPixel());

   return createTexture( bmp, String::EmptyString, profile, true );
}

GFXTextureObject *GFXTextureManager::createTexture( U32 width, U32 height, GFXFormat format, GFXTextureProfile *profile, U32 numMipLevels, S32 antialiasLevel )
{
   // Deal with sizing issues...
   U32 localWidth = width;
   U32 localHeight = height;

   // TODO: Format check HERE! -patw

   validateTextureQuality(profile, localWidth, localHeight);

   U32 numMips = numMipLevels;
   GFXFormat checkFmt = format;
   _validateTexParams( localWidth, localHeight, profile, numMips, checkFmt );

   AssertFatal( checkFmt == format, "Anonymous texture didn't get the format it wanted." );

   GFXTextureObject *outTex = NULL;

   // If this is a pooled profile then look there first.
   if ( profile->isPooled() )
   {
      outTex = _findPooledTexure(   localWidth, localHeight, checkFmt, 
                                    profile, numMips, antialiasLevel );

      // If we got a pooled texture then its
      // already setup... just return it.
      if ( outTex )
         return outTex;
   }
   
   // Create the texture if we didn't get one from the pool.
   if ( !outTex )
   {
      outTex = _createTextureObject( localHeight, localWidth, 0, format, profile, numMips, false, antialiasLevel );

      // Make sure we add it to the pool.
      if ( outTex && profile->isPooled() )
         mTexturePool.insertEqual( profile, outTex );
   }

   if ( !outTex )
   {
      Con::errorf("GFXTextureManager - failed to create anonymous texture.");
      return NULL;
   }

   // And do book-keeping...
   //    - texture info
   outTex->mBitmapSize.set(localWidth, localHeight, 0);
   outTex->mAntialiasLevel = antialiasLevel;

   // PWTODO: Need to assign this a lookup name before _linkTexture() is called
   // otherwise it won't get a hash insert call

   _linkTexture( outTex );

   return outTex;
}

GFXTextureObject *GFXTextureManager::createTexture(   U32 width,
                                                      U32 height,
                                                      U32 depth,
                                                      void *pixels,
                                                      GFXFormat format,
                                                      GFXTextureProfile *profile )
{
   PROFILE_SCOPE( GFXTextureManager_CreateTexture_3D );

   // Create texture...
   GFXTextureObject *ret = _createTextureObject( height, width, depth, format, profile, 1 );

   if(!ret)
   {
      Con::errorf("GFXTextureManager - failed to create anonymous texture.");
      return NULL;
   }

   // Call the internal load...
   if( !_loadTexture( ret, pixels ) )
   {
      Con::errorf("GFXTextureManager - failed to load volume texture" );
      return NULL;
   }


   // And do book-keeping...
   //    - texture info
   ret->mBitmapSize.set( width, height, depth );

   _linkTexture( ret );


   // Return the new texture!
   return ret;
}

GFXTextureObject* GFXTextureManager::_findPooledTexure(  U32 width, 
                                                         U32 height, 
                                                         GFXFormat format, 
                                                         GFXTextureProfile *profile,
                                                         U32 numMipLevels,
                                                         S32 antialiasLevel )
{
   PROFILE_SCOPE( GFXTextureManager_FindPooledTexure );

   GFXTextureObject *outTex;

   // First see if we have a free one in the pool.
   TexturePoolMap::Iterator iter = mTexturePool.find( profile );
   for ( ; iter != mTexturePool.end() && iter->key == profile; iter++ )
   {
      outTex = iter->value;

      // If the reference count is 1 then we're the only
      // ones holding on to this texture and we can hand
      // it out if the size matches... else its in use.
      if ( outTex->getRefCount() != 1 )
         continue;

      // Check for a match... if so return it.  The assignment
      // to a GFXTexHandle will take care of incrementing the
      // reference count and keeping it from being handed out
      // to anyone else.
      if (  outTex->getFormat() == format &&
            outTex->getWidth() == width &&
            outTex->getHeight() == height &&            
            outTex->getMipLevels() == numMipLevels &&
            outTex->mAntialiasLevel == antialiasLevel )
         return outTex;
   }

   return NULL;
}

void GFXTextureManager::hashInsert( GFXTextureObject *object )
{
   if ( object->mTextureLookupName.isEmpty() )
      return;
      
   U32 key = object->mTextureLookupName.getHashCaseInsensitive() % mHashCount;
   object->mHashNext = mHashTable[key];
   mHashTable[key] = object;
}

void GFXTextureManager::hashRemove( GFXTextureObject *object )
{
   if ( object->mTextureLookupName.isEmpty() )
      return;

   U32 key = object->mTextureLookupName.getHashCaseInsensitive() % mHashCount;
   GFXTextureObject **walk = &mHashTable[key];
   while(*walk)
   {
      if(*walk == object)
      {
         *walk = object->mHashNext;
         break;
      }
      walk = &((*walk)->mHashNext);
   }
}

GFXTextureObject* GFXTextureManager::hashFind( const String &name )
{
   if ( name.isEmpty() )
      return NULL;

   U32 key = name.getHashCaseInsensitive() % mHashCount;
   GFXTextureObject *walk = mHashTable[key];
   for(; walk; walk = walk->mHashNext)
   {
      if( walk->mTextureLookupName.equal( name, String::NoCase ) )
         break;
   }

   return walk;
}

void GFXTextureManager::freeTexture(GFXTextureObject *texture, bool zombify)
{
   // Ok, let the backend deal with it.
   _freeTexture(texture, zombify);
}

void GFXTextureManager::refreshTexture(GFXTextureObject *texture)
{
   _refreshTexture(texture);
}

void GFXTextureManager::_linkTexture( GFXTextureObject *obj )
{
   // info for the profile
   GFXTextureProfile::updateStatsForCreation(obj);

   // info for the cache
   hashInsert(obj);

   // info for the master list
   if( mListHead == NULL )
      mListHead = obj;

   if( mListTail != NULL ) 
      mListTail->mNext = obj;

   obj->mPrev = mListTail;
   mListTail = obj;
}

void GFXTextureManager::deleteTexture( GFXTextureObject *texture )
{
   if ( mTextureManagerState == GFXTextureManager::Dead )
      return;

   #ifdef DEBUG_SPEW
   Platform::outputDebugString( "[GFXTextureManager] deleteTexture '%s'",
      texture->mTextureLookupName.c_str()
   );
   #endif

   if( mListHead == texture )
      mListHead = texture->mNext;
   if( mListTail == texture )
      mListTail = texture->mPrev;

   hashRemove( texture );

   // If we have a path for the texture then
   // remove change notifications for it.
   Path texPath = texture->getPath();
   if ( !texPath.isEmpty() )
      FS::RemoveChangeNotification( texPath, this, &GFXTextureManager::_onFileChanged );

   GFXTextureProfile::updateStatsForDeletion(texture);

   freeTexture( texture );
}

void GFXTextureManager::_validateTexParams( const U32 width, const U32 height, 
                                          const GFXTextureProfile *profile, 
                                          U32 &inOutNumMips, GFXFormat &inOutFormat  )
{
   // Validate mipmap parameter. If this profile requests no mips, set mips to 1.
   if( profile->noMip() )
   {
      inOutNumMips = 1;
   }
   else if( !isPow2( width ) || !isPow2( height ) )
   {
      // If a texture is not power-of-2 in size for both dimensions, it must
      // have only 1 mip level.
      inOutNumMips = 1;
   }
   
   // Check format, and compatibility with texture profile requirements
   bool autoGenSupp = ( inOutNumMips == 0 );

   // If the format is non-compressed, and the profile requests a compressed format
   // than change the format.
   GFXFormat testingFormat = inOutFormat;
   if( profile->getCompression() != GFXTextureProfile::None )
   {
      const int offset = profile->getCompression() - GFXTextureProfile::DXT1;
      testingFormat = GFXFormat( GFXFormatDXT1 + offset );

      // No auto-gen mips on compressed textures
      autoGenSupp = false;
   }

   // inOutFormat is not modified by this method
   bool chekFmt = GFX->getCardProfiler()->checkFormat( testingFormat, profile, autoGenSupp ); 
   
   if( !chekFmt )
   {
      // It tested for a compressed format, and didn't like it
      if( testingFormat != inOutFormat && profile->getCompression() )
         testingFormat = inOutFormat; // Reset to requested format, and try again

      // Trying again here, so reset autogen mip
      autoGenSupp = ( inOutNumMips == 0 );

      // Wow more weak sauce. There should be a better way to do this.
      switch( inOutFormat )
      {
         case GFXFormatR8G8B8:
            testingFormat = GFXFormatR8G8B8X8;
            chekFmt = GFX->getCardProfiler()->checkFormat( testingFormat, profile, autoGenSupp );
            break;

         case GFXFormatA8:
            testingFormat = GFXFormatR8G8B8A8;
            chekFmt = GFX->getCardProfiler()->checkFormat( testingFormat, profile, autoGenSupp );
            break;
         
         default:
            chekFmt = GFX->getCardProfiler()->checkFormat( testingFormat, profile, autoGenSupp );
            break;
      }
   }

   // Write back num mips that need to be generated by GBitmap
   if( !chekFmt )
      Con::errorf( "Format %s not supported with specified profile.", GFXStringTextureFormat[inOutFormat] );
   else
   {
      inOutFormat = testingFormat;

      // If auto gen mipmaps were requested, and they aren't supported for whatever
      // reason, than write out the number of mips that need to be generated.
      //
      // NOTE: Does this belong here?
      if( inOutNumMips == 0 && !autoGenSupp )
      {
         U32 currWidth  = width;
         U32 currHeight = height;

         inOutNumMips = 1;
         do 
         {
            currWidth  >>= 1;
            currHeight >>= 1;
            if( currWidth == 0 )
               currWidth  = 1;
            if( currHeight == 0 ) 
               currHeight = 1;

            inOutNumMips++;
         } while ( currWidth != 1 || currHeight != 1 );
      }
   }
}

GFXCubemap* GFXTextureManager::createCubemap( const Torque::Path &path )
{
   // Very first thing... check the cache.
   CubemapTable::Iterator iter = mCubemapTable.find( path.getFullPath() );
   if ( iter != mCubemapTable.end() )
      return iter->value;

   // Not in the cache... we have to load it ourselves.

   // First check for a DDS file.
   if ( !sDDSExt.equal( path.getExtension(), String::NoCase ) )
   {
      // At the moment we only support DDS cubemaps.
      return NULL;
   }

   const U32 scalePower = getTextureDownscalePower( NULL );

   // Ok... load the DDS file then.
   Resource<DDSFile> dds = DDSFile::load( path, scalePower );
   if ( !dds || !dds->isCubemap() )
   {
      // This wasn't a cubemap... give up too.
      return NULL;
   }

   // We loaded the cubemap dds, so now we create the GFXCubemap from it.
   GFXCubemap *cubemap = GFX->createCubemap();
   cubemap->initStatic( dds );
   cubemap->_setPath( path.getFullPath() );

   // Store the cubemap into the cache.
   mCubemapTable.insertUnique( path.getFullPath(), cubemap );

   return cubemap;
}

void GFXTextureManager::releaseCubemap( GFXCubemap *cubemap )
{
   if ( mTextureManagerState == GFXTextureManager::Dead )
      return;

   const String &path = cubemap->getPath();

   CubemapTable::Iterator iter = mCubemapTable.find( path );
   if ( iter != mCubemapTable.end() && iter->value == cubemap )
      mCubemapTable.erase( iter );

   // If we have a path for the texture then
   // remove change notifications for it.
   //Path texPath = texture->getPath();
   //if ( !texPath.isEmpty() )
      //FS::RemoveChangeNotification( texPath, this, &GFXTextureManager::_onFileChanged );
}

void GFXTextureManager::_onFileChanged( const Torque::Path &path )
{
   String pathNoExt = Torque::Path::Join( path.getRoot(), ':', path.getPath() );
   pathNoExt = Torque::Path::Join( pathNoExt, '/', path.getFileName() );

   // See if we've got it loaded.
   GFXTextureObject *obj = hashFind( pathNoExt );
   if ( !obj || path != obj->getPath() )
      return;

   Con::errorf( "[GFXTextureManager::_onFileChanged] : File changed [%s]", path.getFullPath().c_str() );

   const U32 scalePower = getTextureDownscalePower( obj->mProfile );

   if ( sDDSExt.equal( path.getExtension(), String::NoCase) )
   {
      Resource<DDSFile> dds = DDSFile::load( path, scalePower );
      if ( dds )
         _createTexture( dds, obj->mProfile, false, obj );
   }
   else
   {
      Resource<GBitmap> bmp = GBitmap::load( path );
      if( bmp )
         _createTexture( bmp, obj->mTextureLookupName, obj->mProfile, false, obj );
   }
}

void GFXTextureManager::reloadTextures()
{
   GFXTextureObject *tex = mListHead;

   while ( tex != NULL ) 
   {
      const Torque::Path path( tex->mPath );
      if ( !path.isEmpty() )
      {
         const U32 scalePower = getTextureDownscalePower( tex->mProfile );

         if ( sDDSExt.equal( path.getExtension(), String::NoCase ) )
         {
            Resource<DDSFile> dds = DDSFile::load( path, scalePower );
            if ( dds )
               _createTexture( dds, tex->mProfile, false, tex );
         }
         else
         {
            Resource<GBitmap> bmp = GBitmap::load( path );
            if( bmp )
               _createTexture( bmp, tex->mTextureLookupName, tex->mProfile, false, tex );
         }
      }

      tex = tex->mNext;
   }
}

DefineEngineFunction( flushTextureCache, void, (),,
   "Releases all textures and resurrects the texture manager.\n"
   "@ingroup GFX\n" )
{
   if ( !GFX || !TEXMGR )
      return;

   TEXMGR->zombify();
   TEXMGR->resurrect();
}

DefineEngineFunction( cleanupTexturePool, void, (),,
   "Release the unused pooled textures in texture manager freeing up video memory.\n"
   "@ingroup GFX\n" )
{
   if ( !GFX || !TEXMGR )
      return;

   TEXMGR->cleanupPool();
}

DefineEngineFunction( reloadTextures, void, (),,
   "Reload all the textures from disk.\n"
   "@ingroup GFX\n" )
{
   if ( !GFX || !TEXMGR )
      return;

   TEXMGR->reloadTextures();
}