summaryrefslogtreecommitdiffstats
path: root/src/mesa/drivers/dri/common/texmem.c
blob: caabac3448f268cf98d111e0fff15aa56cf28058 (plain)
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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
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
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
/*
 * Copyright 2000-2001 VA Linux Systems, Inc.
 * (C) Copyright IBM Corporation 2002, 2003
 * All Rights Reserved.
 *
 * 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
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, 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 (including the next
 * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS 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.
 *
 * Authors:
 *    Ian Romanick <idr@us.ibm.com>
 *    Keith Whitwell <keithw@tungstengraphics.com>
 *    Kevin E. Martin <kem@users.sourceforge.net>
 *    Gareth Hughes <gareth@nvidia.com>
 */
/* $XFree86:$ */

/** \file texmem.c
 * Implements all of the device-independent texture memory management.
 * 
 * Currently, only a simple LRU texture memory management policy is
 * implemented.  In the (hopefully very near) future, better policies will be
 * implemented.  The idea is that the DRI should be able to run in one of two
 * modes.  In the default mode the DRI will dynamically attempt to discover
 * the best texture management policy for the running application.  In the
 * other mode, the user (via some sort of as yet TBD mechanism) will select
 * a texture management policy that is known to work well with the
 * application.
 */

#include "texmem.h"
#include "simple_list.h"
#include "imports.h"
#include "macros.h"
#include "texformat.h"

#include <assert.h>



static unsigned dummy_swap_counter;


/**
 * Calculate \f$\log_2\f$ of a value.  This is a particularly poor
 * implementation of this function.  However, since system performance is in
 * no way dependent on this function, the slowness of the implementation is
 * irrelevent.
 * 
 * \param n Value whose \f$\log_2\f$ is to be calculated
 */

static GLuint
driLog2( GLuint n )
{
   GLuint log2;

   for ( log2 = 1 ; n > 1 ; log2++ ) {
      n >>= 1;
   }

   return log2;
}




/**
 * Determine if a texture is resident in textureable memory.  Depending on
 * the driver, this may or may not be on-card memory.  It could be AGP memory
 * or anyother type of memory from which the hardware can directly read
 * texels.
 * 
 * This function is intended to be used as the \c IsTextureResident function
 * in the device's \c dd_function_table.
 * 
 * \param ctx GL context pointer (currently unused)
 * \param texObj Texture object to be tested
 */

GLboolean
driIsTextureResident( GLcontext * ctx, 
		      struct gl_texture_object * texObj )
{
   driTextureObject * t;


   t = (driTextureObject *) texObj->DriverData;
   return( (t != NULL) && (t->memBlock != NULL) );
}




/**
 * (Re)initialize the global circular LRU list.  The last element
 * in the array (\a heap->nrRegions) is the sentinal.  Keeping it
 * at the end of the array allows the other elements of the array
 * to be addressed rationally when looking up objects at a particular
 * location in texture memory.
 * 
 * \param heap Texture heap to be reset
 */

static void resetGlobalLRU( driTexHeap * heap )
{
   drmTextureRegionPtr list = heap->global_regions;
   unsigned       sz = 1U << heap->logGranularity;
   unsigned       i;

   for (i = 0 ; (i+1) * sz <= heap->size ; i++) {
      list[i].prev = i-1;
      list[i].next = i+1;
      list[i].age = 0;
   }

   i--;
   list[0].prev = heap->nrRegions;
   list[i].prev = i-1;
   list[i].next = heap->nrRegions;
   list[heap->nrRegions].prev = i;
   list[heap->nrRegions].next = 0;
   heap->global_age[0] = 0;
}

/**
 * Print out debugging information about the local texture LRU.
 *
 * \param heap Texture heap to be printed
 * \param callername Name of calling function
 */
static void printLocalLRU( driTexHeap * heap, const char *callername  )
{
   driTextureObject *t;
   unsigned sz = 1U << heap->logGranularity;

   fprintf( stderr, "%s in %s:\nLocal LRU, heap %d:\n", 
	    __FUNCTION__, callername, heap->heapId );

   foreach ( t, &heap->texture_objects ) {
      if (!t->memBlock)
	 continue;
      if (!t->tObj) {
	 fprintf( stderr, "Placeholder (%p) %d at 0x%x sz 0x%x\n",
		  (void *)t,
		  t->memBlock->ofs / sz,
		  t->memBlock->ofs,
		  t->memBlock->size );
      } else {
	 fprintf( stderr, "Texture (%p) at 0x%x sz 0x%x\n",
		  (void *)t,
		  t->memBlock->ofs,
		  t->memBlock->size );
      }
   }
   foreach ( t, heap->swapped_objects ) {
      if (!t->tObj) {
	 fprintf( stderr, "Swapped Placeholder (%p)\n", (void *)t );
      } else {
	 fprintf( stderr, "Swapped Texture (%p)\n", (void *)t );
      }
   }

   fprintf( stderr, "\n" );
}

/**
 * Print out debugging information about the global texture LRU.
 *
 * \param heap Texture heap to be printed
 * \param callername Name of calling function
 */
static void printGlobalLRU( driTexHeap * heap, const char *callername )
{
   drmTextureRegionPtr list = heap->global_regions;
   unsigned int i, j;

   fprintf( stderr, "%s in %s:\nGlobal LRU, heap %d list %p:\n", 
	    __FUNCTION__, callername, heap->heapId, (void *)list );

   for ( i = 0, j = heap->nrRegions ; i < heap->nrRegions ; i++ ) {
      fprintf( stderr, "list[%d] age %d next %d prev %d in_use %d\n",
	       j, list[j].age, list[j].next, list[j].prev, list[j].in_use );
      j = list[j].next;
      if ( j == heap->nrRegions ) break;
   }

   if ( j != heap->nrRegions ) {
      fprintf( stderr, "Loop detected in global LRU\n" );
      for ( i = 0 ; i < heap->nrRegions ; i++ ) {
	 fprintf( stderr, "list[%d] age %d next %d prev %d in_use %d\n",
		  i, list[i].age, list[i].next, list[i].prev, list[i].in_use );
      }
   }

   fprintf( stderr, "\n" );
}


/**
 * Called by the client whenever it touches a local texture.
 * 
 * \param t Texture object that the client has accessed
 */

void driUpdateTextureLRU( driTextureObject * t )
{
   driTexHeap   * heap;
   drmTextureRegionPtr list;
   unsigned   shift;
   unsigned   start;
   unsigned   end;
   unsigned   i;


   heap = t->heap;
   if ( heap != NULL ) {
      shift = heap->logGranularity;
      start = t->memBlock->ofs >> shift;
      end = (t->memBlock->ofs + t->memBlock->size - 1) >> shift;


      heap->local_age = ++heap->global_age[0];
      list = heap->global_regions;


      /* Update the context's local LRU 
       */

      move_to_head( & heap->texture_objects, t );


      for (i = start ; i <= end ; i++) {
	 list[i].age = heap->local_age;

	 /* remove_from_list(i)
	  */
	 list[(unsigned)list[i].next].prev = list[i].prev;
	 list[(unsigned)list[i].prev].next = list[i].next;

	 /* insert_at_head(list, i)
	  */
	 list[i].prev = heap->nrRegions;
	 list[i].next = list[heap->nrRegions].next;
	 list[(unsigned)list[heap->nrRegions].next].prev = i;
	 list[heap->nrRegions].next = i;
      }

      if ( 0 ) {
	 printGlobalLRU( heap, __FUNCTION__ );
	 printLocalLRU( heap, __FUNCTION__ );
      }
   }
}




/**
 * Keep track of swapped out texture objects.
 * 
 * \param t Texture object to be "swapped" out of its texture heap
 */

void driSwapOutTextureObject( driTextureObject * t )
{
   unsigned   face;


   if ( t->memBlock != NULL ) {
      assert( t->heap != NULL );
      mmFreeMem( t->memBlock );
      t->memBlock = NULL;

      if (t->timestamp > t->heap->timestamp)
	 t->heap->timestamp = t->timestamp;

      t->heap->texture_swaps[0]++;
      move_to_tail( t->heap->swapped_objects, t );
      t->heap = NULL;
   }
   else {
      assert( t->heap == NULL );
   }


   for ( face = 0 ; face < 6 ; face++ ) {
      t->dirty_images[face] = ~0;
   }
}




/**
 * Destroy hardware state associated with texture \a t.  Calls the
 * \a destroy_texture_object method associated with the heap from which
 * \a t was allocated.
 * 
 * \param t Texture object to be destroyed
 */

void driDestroyTextureObject( driTextureObject * t )
{
   driTexHeap * heap;


   if ( 0 ) {
      fprintf( stderr, "[%s:%d] freeing %p (tObj = %p, DriverData = %p)\n",
	       __FILE__, __LINE__,
	       (void *)t,
	       (void *)((t != NULL) ? t->tObj : NULL),
	       (void *)((t != NULL && t->tObj != NULL) ? t->tObj->DriverData : NULL ));
   }

   if ( t != NULL ) {
      if ( t->memBlock ) {
	 heap = t->heap;
	 assert( heap != NULL );

	 heap->texture_swaps[0]++;

	 mmFreeMem( t->memBlock );
	 t->memBlock = NULL;

	 if (t->timestamp > t->heap->timestamp)
	    t->heap->timestamp = t->timestamp;

	 heap->destroy_texture_object( heap->driverContext, t );
	 t->heap = NULL;
      }

      if ( t->tObj != NULL ) {
	 assert( t->tObj->DriverData == t );
	 t->tObj->DriverData = NULL;
      }

      remove_from_list( t );
      FREE( t );
   }

   if ( 0 ) {
      fprintf( stderr, "[%s:%d] done freeing %p\n", __FILE__, __LINE__, (void *)t );
   }
}




/**
 * Update the local heap's representation of texture memory based on
 * data in the SAREA.  This is done each time it is detected that some other
 * direct rendering client has held the lock.  This pertains to both our local
 * textures and the textures belonging to other clients.  Keep track of other
 * client's textures by pushing a placeholder texture onto the LRU list --
 * these are denoted by \a tObj being \a NULL.
 * 
 * \param heap Heap whose state is to be updated
 * \param offset Byte offset in the heap that has been stolen
 * \param size Size, in bytes, of the stolen block
 * \param in_use Non-zero if the block is pinned/reserved by the kernel
 */

static void driTexturesGone( driTexHeap * heap, int offset, int size, 
			     int in_use )
{
   driTextureObject * t;
   driTextureObject * tmp;


   foreach_s ( t, tmp, & heap->texture_objects ) {
      if ( (t->memBlock->ofs < (offset + size))
	   && ((t->memBlock->ofs + t->memBlock->size) > offset) ) {
	 /* It overlaps - kick it out.  If the texture object is just a
	  * place holder, then destroy it all together.  Otherwise, mark
	  * it as being swapped out.
	  */

	 if ( t->tObj != NULL ) {
	    driSwapOutTextureObject( t );
	 }
	 else {
	    driDestroyTextureObject( t );
	 }
      }
   }


   {
      t = (driTextureObject *) CALLOC( heap->texture_object_size );
      if ( t == NULL ) return;

      t->memBlock = mmAllocMem( heap->memory_heap, size, 0, offset );
      if ( t->memBlock == NULL ) {
	 fprintf( stderr, "Couldn't alloc placeholder: heap %u sz %x ofs %x\n", heap->heapId,
		  (int)size, (int)offset );
	 mmDumpMemInfo( heap->memory_heap );
	 FREE(t);
	 return;
      }
      t->heap = heap;
      if (in_use) 
	 t->reserved = 1; 
      insert_at_head( & heap->texture_objects, t );
   }
}




/**
 * Called by the client on lock contention to determine whether textures have
 * been stolen.  If another client has modified a region in which we have
 * textures, then we need to figure out which of our textures have been
 * removed and update our global LRU.
 * 
 * \param heap Texture heap to be updated
 */

void driAgeTextures( driTexHeap * heap )
{
   drmTextureRegionPtr list = heap->global_regions;
   unsigned       sz = 1U << (heap->logGranularity);
   unsigned       i, nr = 0;


   /* Have to go right round from the back to ensure stuff ends up
    * LRU in the local list...  Fix with a cursor pointer.
    */

   for (i = list[heap->nrRegions].prev ; 
	i != heap->nrRegions && nr < heap->nrRegions ; 
	i = list[i].prev, nr++) {
      /* If switching texturing schemes, then the SAREA might not have been
       * properly cleared, so we need to reset the global texture LRU.
       */

      if ( (i * sz) > heap->size ) {
	 nr = heap->nrRegions;
	 break;
      }

      if (list[i].age > heap->local_age) 
	  driTexturesGone( heap, i * sz, sz, list[i].in_use); 
   }

   /* Loop or uninitialized heap detected.  Reset.
    */

   if (nr == heap->nrRegions) {
      driTexturesGone( heap, 0, heap->size, 0);
      resetGlobalLRU( heap );
   }

   if ( 0 ) {
      printGlobalLRU( heap, __FUNCTION__ );
      printLocalLRU( heap, __FUNCTION__ );
   }

   heap->local_age = heap->global_age[0];
}




#define INDEX_ARRAY_SIZE 6 /* I'm not aware of driver with more than 2 heaps */

/**
 * Allocate memory from a texture heap to hold a texture object.  This
 * routine will attempt to allocate memory for the texture from the heaps
 * specified by \c heap_array in order.  That is, first it will try to
 * allocate from \c heap_array[0], then \c heap_array[1], and so on.
 *
 * \param heap_array Array of pointers to texture heaps to use
 * \param nr_heaps Number of heap pointer in \a heap_array
 * \param t Texture object for which space is needed
 * \return The ID of the heap from which memory was allocated, or -1 if
 *         memory could not be allocated.
 *
 * \bug The replacement policy implemented by this function is horrible.
 */


int
driAllocateTexture( driTexHeap * const * heap_array, unsigned nr_heaps,
		    driTextureObject * t )
{
   driTexHeap       * heap;
   driTextureObject * temp;
   driTextureObject * cursor;
   unsigned           id;


   /* In case it already has texture space, initialize heap.  This also
    * prevents GCC from issuing a warning that heap might be used
    * uninitialized.
    */

   heap = t->heap;


   /* Run through each of the existing heaps and try to allocate a buffer
    * to hold the texture.
    */

   for ( id = 0 ; (t->memBlock == NULL) && (id < nr_heaps) ; id++ ) {
      heap = heap_array[ id ];
      if ( heap != NULL ) {
	 t->memBlock = mmAllocMem( heap->memory_heap, t->totalSize, 
				   heap->alignmentShift, 0 );
      }
   }


   /* Kick textures out until the requested texture fits.
    */

   if ( t->memBlock == NULL ) {
      unsigned index[INDEX_ARRAY_SIZE];
      unsigned nrGoodHeaps = 0;

      /* Trying to avoid dynamic memory allocation. If you have more
       * heaps, increase INDEX_ARRAY_SIZE. I'm not aware of any
       * drivers with more than 2 tex heaps. */
      assert( nr_heaps < INDEX_ARRAY_SIZE );

      /* Sort large enough heaps by duty. Insertion sort should be
       * fast enough for such a short array. */
      for ( id = 0 ; id < nr_heaps ; id++ ) {
	 heap = heap_array[ id ];

	 if ( heap != NULL && t->totalSize <= heap->size ) {
	    unsigned j;

	    for ( j = 0 ; j < nrGoodHeaps; j++ ) {
	       if ( heap->duty > heap_array[ index[ j ] ]->duty )
		  break;
	    }

	    if ( j < nrGoodHeaps ) {
	       memmove( &index[ j+1 ], &index[ j ],
			sizeof(index[ 0 ]) * (nrGoodHeaps - j) );
	    }

	    index[ j ] = id;

	    nrGoodHeaps++;
	 }
      }

      for ( id = 0 ; (t->memBlock == NULL) && (id < nrGoodHeaps) ; id++ ) {
	 heap = heap_array[ index[ id ] ];

	 for ( cursor = heap->texture_objects.prev, temp = cursor->prev;
	       cursor != &heap->texture_objects ; 
	       cursor = temp, temp = cursor->prev ) {
	       
	    /* The the LRU element.  If the texture is bound to one of
	     * the texture units, then we cannot kick it out.
	     */
	    if ( cursor->bound || cursor->reserved ) {
	       continue;
	    }

	    if ( cursor->memBlock )
	       heap->duty -= cursor->memBlock->size;

	    /* If this is a placeholder, there's no need to keep it */
	    if (cursor->tObj)
	       driSwapOutTextureObject( cursor );
	    else
	       driDestroyTextureObject( cursor );

	    t->memBlock = mmAllocMem( heap->memory_heap, t->totalSize, 
				      heap->alignmentShift, 0 );

	    if (t->memBlock)
	       break;
	 }
      }

      /* Rebalance duties. If a heap kicked more data than its duty,
       * then all other heaps get that amount multiplied with their
       * relative weight added to their duty. The negative duty is
       * reset to 0. In the end all heaps have a duty >= 0.
       *
       * CAUTION: we must not change the heap pointer here, because it
       * is used below to update the texture object.
       */
      for ( id = 0 ; id < nr_heaps ; id++ )
	 if ( heap_array[ id ] != NULL && heap_array[ id ]->duty < 0) {
	    int duty = -heap_array[ id ]->duty;
	    double weight = heap_array[ id ]->weight;
	    unsigned j;

	    for ( j = 0 ; j < nr_heaps ; j++ )
	       if ( j != id && heap_array[ j ] != NULL ) {
		  heap_array[ j ]->duty += (double) duty *
		     heap_array[ j ]->weight / weight;
	       }

	    heap_array[ id ]->duty = 0;
	 }
   }


   if ( t->memBlock != NULL ) {
      /* id and heap->heapId may or may not be the same value here.
       */

      assert( heap != NULL );
      assert( (t->heap == NULL) || (t->heap == heap) );

      t->heap = heap;
      return heap->heapId;
   }
   else {
      assert( t->heap == NULL );

      fprintf( stderr, "[%s:%d] unable to allocate texture\n",
	       __FUNCTION__, __LINE__ );
      return -1;
   }
}






/**
 * Set the location where the texture-swap counter is stored.
 */

void
driSetTextureSwapCounterLocation( driTexHeap * heap, unsigned * counter )
{
   heap->texture_swaps = (counter == NULL) ? & dummy_swap_counter : counter;
}




/**
 * Create a new heap for texture data.
 * 
 * \param heap_id             Device-dependent heap identifier.  This value
 *                            will returned by driAllocateTexture when memory
 *                            is allocated from this heap.
 * \param context             Device-dependent driver context.  This is
 *                            supplied as the first parameter to the
 *                            \c destroy_tex_obj function.
 * \param size                Size, in bytes, of the texture region
 * \param alignmentShift      Alignment requirement for textures.  If textures 
 *                            must be allocated on a 4096 byte boundry, this
 *                            would be 12.
 * \param nr_regions          Number of regions into which this texture space
 *                            should be partitioned
 * \param global_regions      Array of \c drmTextureRegion structures in the SAREA
 * \param global_age          Pointer to the global texture age in the SAREA
 * \param swapped_objects     Pointer to the list of texture objects that are
 *                            not in texture memory (i.e., have been swapped
 *                            out).
 * \param texture_object_size Size, in bytes, of a device-dependent texture
 *                            object
 * \param destroy_tex_obj     Function used to destroy a device-dependent
 *                            texture object
 *
 * \sa driDestroyTextureHeap
 */

driTexHeap *
driCreateTextureHeap( unsigned heap_id, void * context, unsigned size,
		      unsigned alignmentShift, unsigned nr_regions,
		      drmTextureRegionPtr global_regions, unsigned * global_age,
		      driTextureObject * swapped_objects, 
		      unsigned texture_object_size,
		      destroy_texture_object_t * destroy_tex_obj
		    )
{
   driTexHeap * heap;
   unsigned     l;
    
    
   if ( 0 )
       fprintf( stderr, "%s( %u, %p, %u, %u, %u )\n",
		__FUNCTION__,
		heap_id, (void *)context, size, alignmentShift, nr_regions );

   heap = (driTexHeap *) CALLOC( sizeof( driTexHeap ) );
   if ( heap != NULL ) {
      l = driLog2( (size - 1) / nr_regions );
      if ( l < alignmentShift )
      {
	 l = alignmentShift;
      }

      heap->logGranularity = l;
      heap->size = size & ~((1L << l) - 1);

      heap->memory_heap = mmInit( 0, heap->size );
      if ( heap->memory_heap != NULL ) {
	 heap->heapId = heap_id;
	 heap->driverContext = context;

	 heap->alignmentShift = alignmentShift;
	 heap->nrRegions = nr_regions;
	 heap->global_regions = global_regions;
	 heap->global_age = global_age;
	 heap->swapped_objects = swapped_objects;
	 heap->texture_object_size = texture_object_size;
	 heap->destroy_texture_object = destroy_tex_obj;

	 /* Force global heap init */
	 if (heap->global_age[0] == 0)
	     heap->local_age = ~0;
	 else
	     heap->local_age = 0;

	 make_empty_list( & heap->texture_objects );
	 driSetTextureSwapCounterLocation( heap, NULL );

	 heap->weight = heap->size;
	 heap->duty = 0;
      }
      else {
	 FREE( heap );
	 heap = NULL;
      }
   }


   if ( 0 )
       fprintf( stderr, "%s returning %p\n", __FUNCTION__, (void *)heap );

   return heap;
}




/** Destroys a texture heap
 * 
 * \param heap Texture heap to be destroyed
 */

void
driDestroyTextureHeap( driTexHeap * heap )
{
   driTextureObject * t;
   driTextureObject * temp;


   if ( heap != NULL ) {
      foreach_s( t, temp, & heap->texture_objects ) {
	 driDestroyTextureObject( t );
      }
      foreach_s( t, temp, heap->swapped_objects ) {
	 driDestroyTextureObject( t );
      }

      mmDestroy( heap->memory_heap );
      FREE( heap );
   }
}




/****************************************************************************/
/**
 * Determine how many texels (including all mipmap levels) would be required
 * for a texture map of size \f$2^^\c base_size_log2\f$ would require.
 *
 * \param base_size_log2 \f$log_2\f$ of the size of a side of the texture
 * \param dimensions Number of dimensions of the texture.  Either 2 or 3.
 * \param faces Number of faces of the texture.  Either 1 or 6 (for cube maps).
 * \return Number of texels
 */

static unsigned
texels_this_map_size( int base_size_log2, unsigned dimensions, unsigned faces )
{
   unsigned  texels;


   assert( (faces == 1) || (faces == 6) );
   assert( (dimensions == 2) || (dimensions == 3) );

   texels = 0;
   if ( base_size_log2 >= 0 ) {
      texels = (1U << (dimensions * base_size_log2));

      /* See http://www.mail-archive.com/dri-devel@lists.sourceforge.net/msg03636.html
       * for the complete explaination of why this formulation is used.
       * Basically, the smaller mipmap levels sum to 0.333 the size of the
       * level 0 map.  The total size is therefore the size of the map
       * multipled by 1.333.  The +2 is there to round up.
       */

      texels = (texels * 4 * faces + 2) / 3;
   }

   return texels;
}




struct maps_per_heap {
   unsigned  c[32];
};

static void
fill_in_maximums( driTexHeap * const * heaps, unsigned nr_heaps,
		  unsigned max_bytes_per_texel, unsigned max_size,
		  unsigned mipmaps_at_once, unsigned dimensions,
		  unsigned faces, struct maps_per_heap * max_textures )
{
   unsigned   heap;
   unsigned   log2_size;
   unsigned   mask;


   /* Determine how many textures of each size can be stored in each
    * texture heap.
    */

   for ( heap = 0 ; heap < nr_heaps ; heap++ ) {
      if ( heaps[ heap ] == NULL ) {
	 (void) memset( max_textures[ heap ].c, 0, 
			sizeof( max_textures[ heap ].c ) );
	 continue;
      }

      mask = (1U << heaps[ heap ]->logGranularity) - 1;

      if ( 0 ) {
	 fprintf( stderr, "[%s:%d] heap[%u] = %u bytes, mask = 0x%08x\n",
		  __FILE__, __LINE__,
		  heap, heaps[ heap ]->size, mask );
      }

      for ( log2_size = max_size ; log2_size > 0 ; log2_size-- ) {
	 unsigned   total;


	 /* Determine the total number of bytes required by a texture of
	  * size log2_size.
	  */

	 total = texels_this_map_size( log2_size, dimensions, faces )
	     - texels_this_map_size( log2_size - mipmaps_at_once,
				     dimensions, faces );
	 total *= max_bytes_per_texel;
	 total = (total + mask) & ~mask;

	 /* The number of textures of a given size that will fit in a heap
	  * is equal to the size of the heap divided by the size of the
	  * texture.
	  */

	 max_textures[ heap ].c[ log2_size ] = heaps[ heap ]->size / total;

	 if ( 0 ) {
	    fprintf( stderr, "[%s:%d] max_textures[%u].c[%02u] "
		     "= 0x%08x / 0x%08x "
		     "= %u (%u)\n",
		     __FILE__, __LINE__,
		     heap, log2_size,
		     heaps[ heap ]->size, total,
		     heaps[ heap ]->size / total,
		     max_textures[ heap ].c[ log2_size ] );
	 }
      }
   }
}


static unsigned
get_max_size( unsigned nr_heaps,
	      unsigned texture_units,
	      unsigned max_size,
	      int all_textures_one_heap,
	      struct maps_per_heap * max_textures )
{
   unsigned   heap;
   unsigned   log2_size;


   /* Determine the largest texture size such that a texture of that size
    * can be bound to each texture unit at the same time.  Some hardware
    * may require that all textures be in the same texture heap for
    * multitexturing.
    */

   for ( log2_size = max_size ; log2_size > 0 ; log2_size-- ) {
      unsigned   total = 0;

      for ( heap = 0 ; heap < nr_heaps ; heap++ )
      {
	 total += max_textures[ heap ].c[ log2_size ];

	 if ( 0 ) {
	    fprintf( stderr, "[%s:%d] max_textures[%u].c[%02u] = %u, "
		     "total = %u\n", __FILE__, __LINE__, heap, log2_size,
		     max_textures[ heap ].c[ log2_size ], total );
	 }

	 if ( (max_textures[ heap ].c[ log2_size ] >= texture_units)
	      || (!all_textures_one_heap && (total >= texture_units)) ) {
	    /* The number of mipmap levels is the log-base-2 of the
	     * maximum texture size plus 1.  If the maximum texture size
	     * is 1x1, the log-base-2 is 0 and 1 mipmap level (the base
	     * level) is available.
	     */

	    return log2_size + 1;
	 }
      }
   }

   /* This should NEVER happen.  It should always be possible to have at
    * *least* a 1x1 texture in memory!
    */
   assert( log2_size != 0 );
   return 0;
}

#define SET_MAX(f,v) \
    do { if ( max_sizes[v] != 0 ) { limits-> f = max_sizes[v]; } } while( 0 )

#define SET_MAX_RECT(f,v) \
    do { if ( max_sizes[v] != 0 ) { limits-> f = 1 << (max_sizes[v] - 1); } } while( 0 )


/**
 * Given the amount of texture memory, the number of texture units, and the
 * maximum size of a texel, calculate the maximum texture size the driver can
 * advertise.
 * 
 * \param heaps Texture heaps for this card
 * \param nr_heap Number of texture heaps
 * \param limits OpenGL contants.  MaxTextureUnits must be set.
 * \param max_bytes_per_texel Maximum size of a single texel, in bytes
 * \param max_2D_size \f$\log_2\f$ of the maximum 2D texture size (i.e.,
 *     1024x1024 textures, this would be 10)
 * \param max_3D_size \f$\log_2\f$ of the maximum 3D texture size (i.e.,
 *     1024x1024x1024 textures, this would be 10)
 * \param max_cube_size \f$\log_2\f$ of the maximum cube texture size (i.e.,
 *     1024x1024 textures, this would be 10)
 * \param max_rect_size \f$\log_2\f$ of the maximum texture rectangle size
 *     (i.e., 1024x1024 textures, this would be 10).  This is a power-of-2
 *     even though texture rectangles need not be a power-of-2.
 * \param mipmaps_at_once Total number of mipmaps that can be used
 *     at one time.  For most hardware this will be \f$\c max_size + 1\f$.
 *     For hardware that does not support mipmapping, this will be 1.
 * \param all_textures_one_heap True if the hardware requires that all
 *     textures be in a single texture heap for multitexturing.
 * \param allow_larger_textures 0 conservative, 1 calculate limits
 *     so at least one worst-case texture can fit, 2 just use hw limits.
 */

void
driCalculateMaxTextureLevels( driTexHeap * const * heaps,
			      unsigned nr_heaps,
			      struct gl_constants * limits,
			      unsigned max_bytes_per_texel,
			      unsigned max_2D_size,
			      unsigned max_3D_size,
			      unsigned max_cube_size,
			      unsigned max_rect_size,
			      unsigned mipmaps_at_once,
			      int all_textures_one_heap,
			      int allow_larger_textures )
{
   struct maps_per_heap  max_textures[8];
   unsigned         i;
   const unsigned   dimensions[4] = { 2, 3, 2, 2 };
   const unsigned   faces[4]      = { 1, 1, 6, 1 };
   unsigned         max_sizes[4];
   unsigned         mipmaps[4];


   max_sizes[0] = max_2D_size;
   max_sizes[1] = max_3D_size;
   max_sizes[2] = max_cube_size;
   max_sizes[3] = max_rect_size;

   mipmaps[0] = mipmaps_at_once;
   mipmaps[1] = mipmaps_at_once;
   mipmaps[2] = mipmaps_at_once;
   mipmaps[3] = 1;


   /* Calculate the maximum number of texture levels in two passes.  The
    * first pass determines how many textures of each power-of-two size
    * (including all mipmap levels for that size) can fit in each texture
    * heap.  The second pass finds the largest texture size that allows
    * a texture of that size to be bound to every texture unit.
    */

   for ( i = 0 ; i < 4 ; i++ ) {
      if ( (allow_larger_textures != 2) && (max_sizes[ i ] != 0) ) {
	 fill_in_maximums( heaps, nr_heaps, max_bytes_per_texel,
			   max_sizes[ i ], mipmaps[ i ],
			   dimensions[ i ], faces[ i ],
			   max_textures );

	 max_sizes[ i ] = get_max_size( nr_heaps,
					allow_larger_textures == 1 ?
					1 : limits->MaxTextureUnits,
					max_sizes[ i ],
					all_textures_one_heap,
					max_textures );
      }
      else if (max_sizes[ i ] != 0) {
	 max_sizes[ i ] += 1;
      }
   }

   SET_MAX( MaxTextureLevels,        0 );
   SET_MAX( Max3DTextureLevels,      1 );
   SET_MAX( MaxCubeTextureLevels,    2 );
   SET_MAX_RECT( MaxTextureRectSize, 3 );
}




/**
 * Perform initial binding of default textures objects on a per unit, per
 * texture target basis.
 *
 * \param ctx Current OpenGL context
 * \param swapped List of swapped-out textures
 * \param targets Bit-mask of value texture targets
 */

void driInitTextureObjects( GLcontext *ctx, driTextureObject * swapped,
			    GLuint targets )
{
   struct gl_texture_object *texObj;
   GLuint tmp = ctx->Texture.CurrentUnit;
   unsigned   i;


   for ( i = 0 ; i < ctx->Const.MaxTextureUnits ; i++ ) {
      ctx->Texture.CurrentUnit = i;

      if ( (targets & DRI_TEXMGR_DO_TEXTURE_1D) != 0 ) {
	 texObj = ctx->Texture.Unit[i].Current1D;
	 ctx->Driver.BindTexture( ctx, GL_TEXTURE_1D, texObj );
	 move_to_tail( swapped, (driTextureObject *) texObj->DriverData );
      }

      if ( (targets & DRI_TEXMGR_DO_TEXTURE_2D) != 0 ) {
	 texObj = ctx->Texture.Unit[i].Current2D;
	 ctx->Driver.BindTexture( ctx, GL_TEXTURE_2D, texObj );
	 move_to_tail( swapped, (driTextureObject *) texObj->DriverData );
      }

      if ( (targets & DRI_TEXMGR_DO_TEXTURE_3D) != 0 ) {
	 texObj = ctx->Texture.Unit[i].Current3D;
	 ctx->Driver.BindTexture( ctx, GL_TEXTURE_3D, texObj );
	 move_to_tail( swapped, (driTextureObject *) texObj->DriverData );
      }

      if ( (targets & DRI_TEXMGR_DO_TEXTURE_CUBE) != 0 ) {
	 texObj = ctx->Texture.Unit[i].CurrentCubeMap;
	 ctx->Driver.BindTexture( ctx, GL_TEXTURE_CUBE_MAP_ARB, texObj );
	 move_to_tail( swapped, (driTextureObject *) texObj->DriverData );
      }

      if ( (targets & DRI_TEXMGR_DO_TEXTURE_RECT) != 0 ) {
	 texObj = ctx->Texture.Unit[i].CurrentRect;
	 ctx->Driver.BindTexture( ctx, GL_TEXTURE_RECTANGLE_NV, texObj );
	 move_to_tail( swapped, (driTextureObject *) texObj->DriverData );
      }
   }

   ctx->Texture.CurrentUnit = tmp;
}




/**
 * Verify that the specified texture is in the specificed heap.
 * 
 * \param tex   Texture to be tested.
 * \param heap  Texture memory heap to be tested.
 * \return True if the texture is in the heap, false otherwise.
 */

static GLboolean
check_in_heap( const driTextureObject * tex, const driTexHeap * heap )
{
#if 1
   return tex->heap == heap;
#else
   driTextureObject * curr;

   foreach( curr, & heap->texture_objects ) {
      if ( curr == tex ) {
	 break;
      }
   }

   return curr == tex;
#endif
}



/****************************************************************************/
/**
 * Validate the consistency of a set of texture heaps.
 * Original version by Keith Whitwell in r200/r200_sanity.c.
 */

GLboolean
driValidateTextureHeaps( driTexHeap * const * texture_heaps,
			 unsigned nr_heaps, const driTextureObject * swapped )
{
   driTextureObject *t;
   unsigned  i;

   for ( i = 0 ; i < nr_heaps ; i++ ) {
      int last_end = 0;
      unsigned textures_in_heap = 0;
      unsigned blocks_in_mempool = 0;
      const driTexHeap * heap = texture_heaps[i];
      const struct mem_block *p = heap->memory_heap;

      /* Check each texture object has a MemBlock, and is linked into
       * the correct heap.  
       *
       * Check the texobj base address corresponds to the MemBlock
       * range.  Check the texobj size (recalculate?) fits within
       * the MemBlock.
       *
       * Count the number of texobj's using this heap.
       */

      foreach ( t, &heap->texture_objects ) {
	 if ( !check_in_heap( t, heap ) ) {
	    fprintf( stderr, "%s memory block for texture object @ %p not "
		     "found in heap #%d\n",
		     __FUNCTION__, (void *)t, i );
	    return GL_FALSE;
	 }


	 if ( t->totalSize > t->memBlock->size ) {
	    fprintf( stderr, "%s: Memory block for texture object @ %p is "
		     "only %u bytes, but %u are required\n",
		     __FUNCTION__, (void *)t, t->totalSize, t->memBlock->size );
	    return GL_FALSE;
	 }

	 textures_in_heap++;
      }

      /* Validate the contents of the heap:
       *   - Ordering
       *   - Overlaps
       *   - Bounds
       */

      while ( p != NULL ) {
	 if (p->reserved) {
	    fprintf( stderr, "%s: Block (%08x,%x), is reserved?!\n",
		     __FUNCTION__, p->ofs, p->size );
	    return GL_FALSE;
	 }

	 if (p->ofs != last_end) {
	    fprintf( stderr, "%s: blocks_in_mempool = %d, last_end = %d, p->ofs = %d\n",
		     __FUNCTION__, blocks_in_mempool, last_end, p->ofs );
	    return GL_FALSE;
	 }

	 if (!p->reserved && !p->free) {
	    blocks_in_mempool++;
	 }

	 last_end = p->ofs + p->size;
	 p = p->next;
      }

      if (textures_in_heap != blocks_in_mempool) {
	 fprintf( stderr, "%s: Different number of textures objects (%u) and "
		  "inuse memory blocks (%u)\n", 
		  __FUNCTION__, textures_in_heap, blocks_in_mempool );
	 return GL_FALSE;
      }

#if 0
      fprintf( stderr, "%s: textures_in_heap = %u\n", 
	       __FUNCTION__, textures_in_heap );
#endif
   }


   /* Check swapped texobj's have zero memblocks
    */
   i = 0;
   foreach ( t, swapped ) {
      if ( t->memBlock != NULL ) {
	 fprintf( stderr, "%s: Swapped texobj %p has non-NULL memblock %p\n",
		  __FUNCTION__, (void *)t, (void *)t->memBlock );
	 return GL_FALSE;
      }
      i++;
   }

#if 0
   fprintf( stderr, "%s: swapped texture count = %u\n", __FUNCTION__, i );
#endif

   return GL_TRUE;
}




/****************************************************************************/
/**
 * Compute which mipmap levels that really need to be sent to the hardware.
 * This depends on the base image size, GL_TEXTURE_MIN_LOD,
 * GL_TEXTURE_MAX_LOD, GL_TEXTURE_BASE_LEVEL, and GL_TEXTURE_MAX_LEVEL.
 */

void
driCalculateTextureFirstLastLevel( driTextureObject * t )
{
   struct gl_texture_object * const tObj = t->tObj;
   const struct gl_texture_image * const baseImage =
       tObj->Image[0][tObj->BaseLevel];

   /* These must be signed values.  MinLod and MaxLod can be negative numbers,
    * and having firstLevel and lastLevel as signed prevents the need for
    * extra sign checks.
    */
   int   firstLevel;
   int   lastLevel;

   /* Yes, this looks overly complicated, but it's all needed.
    */

   switch (tObj->Target) {
   case GL_TEXTURE_1D:
   case GL_TEXTURE_2D:
   case GL_TEXTURE_3D:
   case GL_TEXTURE_CUBE_MAP:
      if (tObj->MinFilter == GL_NEAREST || tObj->MinFilter == GL_LINEAR) {
         /* GL_NEAREST and GL_LINEAR only care about GL_TEXTURE_BASE_LEVEL.
          */

         firstLevel = lastLevel = tObj->BaseLevel;
      }
      else {
	 firstLevel = tObj->BaseLevel + (GLint)(tObj->MinLod + 0.5);
	 firstLevel = MAX2(firstLevel, tObj->BaseLevel);
	 firstLevel = MIN2(firstLevel, tObj->BaseLevel + baseImage->MaxLog2);
	 lastLevel = tObj->BaseLevel + (GLint)(tObj->MaxLod + 0.5);
	 lastLevel = MAX2(lastLevel, t->tObj->BaseLevel);
	 lastLevel = MIN2(lastLevel, t->tObj->BaseLevel + baseImage->MaxLog2);
	 lastLevel = MIN2(lastLevel, t->tObj->MaxLevel);
	 lastLevel = MAX2(firstLevel, lastLevel); /* need at least one level */
      }
      break;
   case GL_TEXTURE_RECTANGLE_NV:
   case GL_TEXTURE_4D_SGIS:
      firstLevel = lastLevel = 0;
      break;
   default:
      return;
   }

   /* save these values */
   t->firstLevel = firstLevel;
   t->lastLevel = lastLevel;
}




/**
 * \name DRI texture formats.  Pointers initialized to either the big- or
 * little-endian Mesa formats.
 */
/*@{*/
const struct gl_texture_format *_dri_texformat_rgba8888 = NULL;
const struct gl_texture_format *_dri_texformat_argb8888 = NULL;
const struct gl_texture_format *_dri_texformat_rgb565 = NULL;
const struct gl_texture_format *_dri_texformat_argb4444 = NULL;
const struct gl_texture_format *_dri_texformat_argb1555 = NULL;
const struct gl_texture_format *_dri_texformat_al88 = NULL;
const struct gl_texture_format *_dri_texformat_a8 = &_mesa_texformat_a8;
const struct gl_texture_format *_dri_texformat_ci8 = &_mesa_texformat_ci8;
const struct gl_texture_format *_dri_texformat_i8 = &_mesa_texformat_i8;
const struct gl_texture_format *_dri_texformat_l8 = &_mesa_texformat_l8;
/*@}*/


/**
 * Initialize little endian target, host byte order independent texture formats
 */
void
driInitTextureFormats(void)
{
   const GLuint ui = 1;
   const GLubyte littleEndian = *((const GLubyte *) &ui);

   if (littleEndian) {
      _dri_texformat_rgba8888	= &_mesa_texformat_rgba8888;
      _dri_texformat_argb8888	= &_mesa_texformat_argb8888;
      _dri_texformat_rgb565	= &_mesa_texformat_rgb565;
      _dri_texformat_argb4444	= &_mesa_texformat_argb4444;
      _dri_texformat_argb1555	= &_mesa_texformat_argb1555;
      _dri_texformat_al88	= &_mesa_texformat_al88;
   }
   else {
      _dri_texformat_rgba8888	= &_mesa_texformat_rgba8888_rev;
      _dri_texformat_argb8888	= &_mesa_texformat_argb8888_rev;
      _dri_texformat_rgb565	= &_mesa_texformat_rgb565_rev;
      _dri_texformat_argb4444	= &_mesa_texformat_argb4444_rev;
      _dri_texformat_argb1555	= &_mesa_texformat_argb1555_rev;
      _dri_texformat_al88	= &_mesa_texformat_al88_rev;
   }
}