summaryrefslogtreecommitdiffstats
path: root/src/mesa/main/uniform_query.cpp
blob: 52b04c92434286e375ebcba5f42473450e7a58cb (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
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
/*
 * Mesa 3-D graphics library
 *
 * Copyright (C) 2004-2008  Brian Paul   All Rights Reserved.
 * Copyright (C) 2009-2010  VMware, Inc.  All Rights Reserved.
 * Copyright © 2010, 2011 Intel Corporation
 *
 * 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 <stdlib.h>
#include <inttypes.h>  /* for PRIx64 macro */

#include "main/core.h"
#include "main/context.h"
#include "main/shaderapi.h"
#include "main/shaderobj.h"
#include "main/uniforms.h"
#include "compiler/glsl/ir.h"
#include "compiler/glsl/ir_uniform.h"
#include "compiler/glsl/glsl_parser_extras.h"
#include "compiler/glsl/program.h"
#include "util/bitscan.h"


extern "C" void GLAPIENTRY
_mesa_GetActiveUniform(GLuint program, GLuint index,
                       GLsizei maxLength, GLsizei *length, GLint *size,
                       GLenum *type, GLcharARB *nameOut)
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_shader_program *shProg;
   struct gl_program_resource *res;

   if (maxLength < 0) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniform(maxLength < 0)");
      return;
   }

   shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveUniform");
   if (!shProg)
      return;

   res = _mesa_program_resource_find_index((struct gl_shader_program *) shProg,
                                           GL_UNIFORM, index);

   if (!res) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniform(index)");
      return;
   }

   if (nameOut)
      _mesa_get_program_resource_name(shProg, GL_UNIFORM, index, maxLength,
                                      length, nameOut, "glGetActiveUniform");
   if (type)
      _mesa_program_resource_prop((struct gl_shader_program *) shProg,
                                  res, index, GL_TYPE, (GLint*) type,
                                  "glGetActiveUniform");
   if (size)
      _mesa_program_resource_prop((struct gl_shader_program *) shProg,
                                  res, index, GL_ARRAY_SIZE, (GLint*) size,
                                  "glGetActiveUniform");
}

static GLenum
resource_prop_from_uniform_prop(GLenum uni_prop)
{
   switch (uni_prop) {
   case GL_UNIFORM_TYPE:
      return GL_TYPE;
   case GL_UNIFORM_SIZE:
      return GL_ARRAY_SIZE;
   case GL_UNIFORM_NAME_LENGTH:
      return GL_NAME_LENGTH;
   case GL_UNIFORM_BLOCK_INDEX:
      return GL_BLOCK_INDEX;
   case GL_UNIFORM_OFFSET:
      return GL_OFFSET;
   case GL_UNIFORM_ARRAY_STRIDE:
      return GL_ARRAY_STRIDE;
   case GL_UNIFORM_MATRIX_STRIDE:
      return GL_MATRIX_STRIDE;
   case GL_UNIFORM_IS_ROW_MAJOR:
      return GL_IS_ROW_MAJOR;
   case GL_UNIFORM_ATOMIC_COUNTER_BUFFER_INDEX:
      return GL_ATOMIC_COUNTER_BUFFER_INDEX;
   default:
      return 0;
   }
}

extern "C" void GLAPIENTRY
_mesa_GetActiveUniformsiv(GLuint program,
			  GLsizei uniformCount,
			  const GLuint *uniformIndices,
			  GLenum pname,
			  GLint *params)
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_shader_program *shProg;
   struct gl_program_resource *res;
   GLenum res_prop;

   if (uniformCount < 0) {
      _mesa_error(ctx, GL_INVALID_VALUE,
		  "glGetActiveUniformsiv(uniformCount < 0)");
      return;
   }

   shProg = _mesa_lookup_shader_program_err(ctx, program, "glGetActiveUniform");
   if (!shProg)
      return;

   res_prop = resource_prop_from_uniform_prop(pname);

   /* We need to first verify that each entry exists as active uniform. If
    * not, generate error and do not cause any other side effects.
    *
    * In the case of and error condition, Page 16 (section 2.3.1 Errors)
    * of the OpenGL 4.5 spec says:
    *
    *     "If the generating command modifies values through a pointer argu-
    *     ment, no change is made to these values."
    */
   for (int i = 0; i < uniformCount; i++) {
      if (!_mesa_program_resource_find_index(shProg, GL_UNIFORM,
                                              uniformIndices[i])) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glGetActiveUniformsiv(index)");
         return;
      }
   }

   for (int i = 0; i < uniformCount; i++) {
      res = _mesa_program_resource_find_index(shProg, GL_UNIFORM,
                                              uniformIndices[i]);
      if (!_mesa_program_resource_prop(shProg, res, uniformIndices[i],
                                       res_prop, &params[i],
                                       "glGetActiveUniformsiv"))
         break;
   }
}

static struct gl_uniform_storage *
validate_uniform_parameters(GLint location, GLsizei count,
                            unsigned *array_index,
                            struct gl_context *ctx,
                            struct gl_shader_program *shProg,
                            const char *caller)
{
   if (shProg == NULL) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)", caller);
      return NULL;
   }

   /* From page 12 (page 26 of the PDF) of the OpenGL 2.1 spec:
    *
    *     "If a negative number is provided where an argument of type sizei or
    *     sizeiptr is specified, the error INVALID_VALUE is generated."
    */
   if (count < 0) {
      _mesa_error(ctx, GL_INVALID_VALUE, "%s(count < 0)", caller);
      return NULL;
   }

   /* Check that the given location is in bounds of uniform remap table.
    * Unlinked programs will have NumUniformRemapTable == 0, so we can take
    * the shProg->data->LinkStatus check out of the main path.
    */
   if (unlikely(location >= (GLint) shProg->NumUniformRemapTable)) {
      if (!shProg->data->LinkStatus)
         _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)",
                     caller);
      else
         _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)",
                     caller, location);

      return NULL;
   }

   if (location == -1) {
      if (!shProg->data->LinkStatus)
         _mesa_error(ctx, GL_INVALID_OPERATION, "%s(program not linked)",
                     caller);

      return NULL;
   }

   /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says:
    *
    *     "If any of the following conditions occur, an INVALID_OPERATION
    *     error is generated by the Uniform* commands, and no uniform values
    *     are changed:
    *
    *     ...
    *
    *         - if no variable with a location of location exists in the
    *           program object currently in use and location is not -1,
    *         - if count is greater than one, and the uniform declared in the
    *           shader is not an array variable,
    */
   if (location < -1 || !shProg->UniformRemapTable[location]) {
      _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)",
                  caller, location);
      return NULL;
   }

   /* If the driver storage pointer in remap table is -1, we ignore silently.
    *
    * GL_ARB_explicit_uniform_location spec says:
    *     "What happens if Uniform* is called with an explicitly defined
    *     uniform location, but that uniform is deemed inactive by the
    *     linker?
    *
    *     RESOLVED: The call is ignored for inactive uniform variables and
    *     no error is generated."
    *
    */
   if (shProg->UniformRemapTable[location] ==
       INACTIVE_UNIFORM_EXPLICIT_LOCATION)
      return NULL;

   struct gl_uniform_storage *const uni = shProg->UniformRemapTable[location];

   /* Even though no location is assigned to a built-in uniform and this
    * function should already have returned NULL, this test makes it explicit
    * that we are not allowing to update the value of a built-in.
    */
   if (uni->builtin)
      return NULL;

   if (uni->array_elements == 0) {
      if (count > 1) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "%s(count = %u for non-array \"%s\"@%d)",
                     caller, count, uni->name, location);
         return NULL;
      }

      assert((location - uni->remap_location) == 0);
      *array_index = 0;
   } else {
      /* The array index specified by the uniform location is just the uniform
       * location minus the base location of of the uniform.
       */
      *array_index = location - uni->remap_location;

      /* If the uniform is an array, check that array_index is in bounds.
       * array_index is unsigned so no need to check for less than zero.
       */
      if (*array_index >= uni->array_elements) {
         _mesa_error(ctx, GL_INVALID_OPERATION, "%s(location=%d)",
                     caller, location);
         return NULL;
      }
   }
   return uni;
}

/**
 * Called via glGetUniform[fiui]v() to get the current value of a uniform.
 */
extern "C" void
_mesa_get_uniform(struct gl_context *ctx, GLuint program, GLint location,
		  GLsizei bufSize, enum glsl_base_type returnType,
		  GLvoid *paramsOut)
{
   struct gl_shader_program *shProg =
      _mesa_lookup_shader_program_err(ctx, program, "glGetUniformfv");
   unsigned offset;

   struct gl_uniform_storage *const uni =
      validate_uniform_parameters(location, 1, &offset,
                                  ctx, shProg, "glGetUniform");
   if (uni == NULL) {
      /* For glGetUniform, page 264 (page 278 of the PDF) of the OpenGL 2.1
       * spec says:
       *
       *     "The error INVALID_OPERATION is generated if program has not been
       *     linked successfully, or if location is not a valid location for
       *     program."
       *
       * For glUniform, page 82 (page 96 of the PDF) of the OpenGL 2.1 spec
       * says:
       *
       *     "If the value of location is -1, the Uniform* commands will
       *     silently ignore the data passed in, and the current uniform
       *     values will not be changed."
       *
       * Allowing -1 for the location parameter of glUniform allows
       * applications to avoid error paths in the case that, for example, some
       * uniform variable is removed by the compiler / linker after
       * optimization.  In this case, the new value of the uniform is dropped
       * on the floor.  For the case of glGetUniform, there is nothing
       * sensible to do for a location of -1.
       *
       * If the location was -1, validate_unfirom_parameters will return NULL
       * without raising an error.  Raise the error here.
       */
      if (location == -1) {
         _mesa_error(ctx, GL_INVALID_OPERATION, "glGetUniform(location=%d)",
                     location);
      }

      return;
   }

   {
      unsigned elements = uni->type->components();
      const int rmul = glsl_base_type_is_64bit(returnType) ? 2 : 1;
      int dmul = (uni->type->is_64bit()) ? 2 : 1;

      if ((uni->type->is_sampler() || uni->type->is_image()) &&
          !uni->is_bindless) {
         /* Non-bindless samplers/images are represented using unsigned integer
          * 32-bit, while bindless handles are 64-bit.
          */
         dmul = 1;
      }

      /* Calculate the source base address *BEFORE* modifying elements to
       * account for the size of the user's buffer.
       */
      const union gl_constant_value *const src =
         &uni->storage[offset * elements * dmul];

      assert(returnType == GLSL_TYPE_FLOAT || returnType == GLSL_TYPE_INT ||
             returnType == GLSL_TYPE_UINT || returnType == GLSL_TYPE_DOUBLE ||
             returnType == GLSL_TYPE_UINT64 || returnType == GLSL_TYPE_INT64);

      /* doubles have a different size than the other 3 types */
      unsigned bytes = sizeof(src[0]) * elements * rmul;
      if (bufSize < 0 || bytes > (unsigned) bufSize) {
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glGetnUniform*vARB(out of bounds: bufSize is %d,"
                     " but %u bytes are required)", bufSize, bytes);
         return;
      }

      /* If the return type and the uniform's native type are "compatible,"
       * just memcpy the data.  If the types are not compatible, perform a
       * slower convert-and-copy process.
       */
      if (returnType == uni->type->base_type ||
          ((returnType == GLSL_TYPE_INT || returnType == GLSL_TYPE_UINT) &&
           (uni->type->is_sampler() || uni->type->is_image())) ||
          (returnType == GLSL_TYPE_UINT64 && uni->is_bindless)) {
         memcpy(paramsOut, src, bytes);
      } else {
         union gl_constant_value *const dst =
            (union gl_constant_value *) paramsOut;
         /* This code could be optimized by putting the loop inside the switch
          * statements.  However, this is not expected to be
          * performance-critical code.
          */
         for (unsigned i = 0; i < elements; i++) {
            int sidx = i * dmul;
            int didx = i * rmul;

            switch (returnType) {
            case GLSL_TYPE_FLOAT:
               switch (uni->type->base_type) {
               case GLSL_TYPE_UINT:
                  dst[didx].f = (float) src[sidx].u;
                  break;
               case GLSL_TYPE_INT:
               case GLSL_TYPE_SAMPLER:
               case GLSL_TYPE_IMAGE:
                  dst[didx].f = (float) src[sidx].i;
                  break;
               case GLSL_TYPE_BOOL:
                  dst[didx].f = src[sidx].i ? 1.0f : 0.0f;
                  break;
               case GLSL_TYPE_DOUBLE: {
                  double tmp;
                  memcpy(&tmp, &src[sidx].f, sizeof(tmp));
                  dst[didx].f = tmp;
                  break;
               }
               case GLSL_TYPE_UINT64: {
                  uint64_t tmp;
                  memcpy(&tmp, &src[sidx].u, sizeof(tmp));
                  dst[didx].f = tmp;
                  break;
                }
               case GLSL_TYPE_INT64: {
                  uint64_t tmp;
                  memcpy(&tmp, &src[sidx].i, sizeof(tmp));
                  dst[didx].f = tmp;
                  break;
               }
               default:
                  assert(!"Should not get here.");
                  break;
               }
               break;

            case GLSL_TYPE_DOUBLE:
               switch (uni->type->base_type) {
               case GLSL_TYPE_UINT: {
                  double tmp = src[sidx].u;
                  memcpy(&dst[didx].f, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_INT:
               case GLSL_TYPE_SAMPLER:
               case GLSL_TYPE_IMAGE: {
                  double tmp = src[sidx].i;
                  memcpy(&dst[didx].f, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_BOOL: {
                  double tmp = src[sidx].i ? 1.0 : 0.0;
                  memcpy(&dst[didx].f, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_FLOAT: {
                  double tmp = src[sidx].f;
                  memcpy(&dst[didx].f, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_UINT64: {
                  uint64_t tmpu;
                  double tmp;
                  memcpy(&tmpu, &src[sidx].u, sizeof(tmpu));
                  tmp = tmpu;
                  memcpy(&dst[didx].f, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_INT64: {
                  int64_t tmpi;
                  double tmp;
                  memcpy(&tmpi, &src[sidx].i, sizeof(tmpi));
                  tmp = tmpi;
                  memcpy(&dst[didx].f, &tmp, sizeof(tmp));
                  break;
               }
               default:
                  assert(!"Should not get here.");
                  break;
               }
               break;

            case GLSL_TYPE_INT:
               switch (uni->type->base_type) {
               case GLSL_TYPE_FLOAT:
                  /* While the GL 3.2 core spec doesn't explicitly
                   * state how conversion of float uniforms to integer
                   * values works, in section 6.2 "State Tables" on
                   * page 267 it says:
                   *
                   *     "Unless otherwise specified, when floating
                   *      point state is returned as integer values or
                   *      integer state is returned as floating-point
                   *      values it is converted in the fashion
                   *      described in section 6.1.2"
                   *
                   * That section, on page 248, says:
                   *
                   *     "If GetIntegerv or GetInteger64v are called,
                   *      a floating-point value is rounded to the
                   *      nearest integer..."
                   */
                  dst[didx].i = (int64_t) roundf(src[sidx].f);
                  break;
               case GLSL_TYPE_BOOL:
                  dst[didx].i = src[sidx].i ? 1 : 0;
                  break;
               case GLSL_TYPE_UINT:
                  dst[didx].i = MIN2(src[sidx].i, INT_MAX);
                  break;
               case GLSL_TYPE_DOUBLE: {
                  double tmp;
                  memcpy(&tmp, &src[sidx].f, sizeof(tmp));
                  dst[didx].i = (int64_t) round(tmp);
                  break;
               }
               case GLSL_TYPE_UINT64: {
                  uint64_t tmp;
                  memcpy(&tmp, &src[sidx].u, sizeof(tmp));
                  dst[didx].i = tmp;
                  break;
               }
               case GLSL_TYPE_INT64: {
                  int64_t tmp;
                  memcpy(&tmp, &src[sidx].i, sizeof(tmp));
                  dst[didx].i = tmp;
                  break;
               }
               default:
                  assert(!"Should not get here.");
                  break;
               }
               break;

            case GLSL_TYPE_UINT:
               switch (uni->type->base_type) {
               case GLSL_TYPE_FLOAT:
                  /* The spec isn't terribly clear how to handle negative
                   * values with an unsigned return type.
                   *
                   * GL 4.5 section 2.2.2 ("Data Conversions for State
                   * Query Commands") says:
                   *
                   * "If a value is so large in magnitude that it cannot be
                   *  represented by the returned data type, then the nearest
                   *  value representable using the requested type is
                   *  returned."
                   */
                  dst[didx].u = src[sidx].f < 0.0f ?
                     0u : (uint32_t) roundf(src[sidx].f);
                  break;
               case GLSL_TYPE_BOOL:
                  dst[didx].i = src[sidx].i ? 1 : 0;
                  break;
               case GLSL_TYPE_INT:
                  dst[didx].i = MAX2(src[sidx].i, 0);
                  break;
               case GLSL_TYPE_DOUBLE: {
                  double tmp;
                  memcpy(&tmp, &src[sidx].f, sizeof(tmp));
                  dst[didx].u = tmp < 0.0 ? 0u : (uint32_t) round(tmp);
                  break;
               }
               case GLSL_TYPE_UINT64: {
                  uint64_t tmp;
                  memcpy(&tmp, &src[sidx].u, sizeof(tmp));
                  dst[didx].i = MIN2(tmp, INT_MAX);
                  break;
               }
               case GLSL_TYPE_INT64: {
                  int64_t tmp;
                  memcpy(&tmp, &src[sidx].i, sizeof(tmp));
                  dst[didx].i = MAX2(tmp, 0);
                  break;
               }
               default:
                  unreachable("invalid uniform type");
               }
               break;

            case GLSL_TYPE_INT64:
               switch (uni->type->base_type) {
               case GLSL_TYPE_UINT: {
                  uint64_t tmp = src[sidx].u;
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_INT:
               case GLSL_TYPE_SAMPLER:
               case GLSL_TYPE_IMAGE: {
                  int64_t tmp = src[sidx].i;
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_BOOL: {
                  int64_t tmp = src[sidx].i ? 1.0f : 0.0f;
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_UINT64: {
                  uint64_t u64;
                  memcpy(&u64, &src[sidx].u, sizeof(u64));
                  int64_t tmp = MIN2(u64, INT_MAX);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_FLOAT: {
                  int64_t tmp = (int64_t) roundf(src[sidx].f);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_DOUBLE: {
                  double d;
                  memcpy(&d, &src[sidx].f, sizeof(d));
                  int64_t tmp = (int64_t) round(d);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               default:
                  assert(!"Should not get here.");
                  break;
               }
               break;

            case GLSL_TYPE_UINT64:
               switch (uni->type->base_type) {
               case GLSL_TYPE_UINT: {
                  uint64_t tmp = src[sidx].u;
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_INT:
               case GLSL_TYPE_SAMPLER:
               case GLSL_TYPE_IMAGE: {
                  int64_t tmp = MAX2(src[sidx].i, 0);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_BOOL: {
                  int64_t tmp = src[sidx].i ? 1.0f : 0.0f;
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_INT64: {
                  uint64_t i64;
                  memcpy(&i64, &src[sidx].i, sizeof(i64));
                  uint64_t tmp = MAX2(i64, 0);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_FLOAT: {
                  uint64_t tmp = src[sidx].f < 0.0f ?
                     0ull : (uint64_t) roundf(src[sidx].f);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               case GLSL_TYPE_DOUBLE: {
                  double d;
                  memcpy(&d, &src[sidx].f, sizeof(d));
                  uint64_t tmp = (d < 0.0) ? 0ull : (uint64_t) round(d);
                  memcpy(&dst[didx].u, &tmp, sizeof(tmp));
                  break;
               }
               default:
                  assert(!"Should not get here.");
                  break;
               }
               break;

            default:
               assert(!"Should not get here.");
               break;
            }
         }
      }
   }
}

static void
log_uniform(const void *values, enum glsl_base_type basicType,
	    unsigned rows, unsigned cols, unsigned count,
	    bool transpose,
	    const struct gl_shader_program *shProg,
	    GLint location,
	    const struct gl_uniform_storage *uni)
{

   const union gl_constant_value *v = (const union gl_constant_value *) values;
   const unsigned elems = rows * cols * count;
   const char *const extra = (cols == 1) ? "uniform" : "uniform matrix";

   printf("Mesa: set program %u %s \"%s\" (loc %d, type \"%s\", "
	  "transpose = %s) to: ",
	  shProg->Name, extra, uni->name, location, uni->type->name,
	  transpose ? "true" : "false");
   for (unsigned i = 0; i < elems; i++) {
      if (i != 0 && ((i % rows) == 0))
	 printf(", ");

      switch (basicType) {
      case GLSL_TYPE_UINT:
	 printf("%u ", v[i].u);
	 break;
      case GLSL_TYPE_INT:
	 printf("%d ", v[i].i);
	 break;
      case GLSL_TYPE_UINT64: {
         uint64_t tmp;
         memcpy(&tmp, &v[i * 2].u, sizeof(tmp));
         printf("%" PRIu64 " ", tmp);
         break;
      }
      case GLSL_TYPE_INT64: {
         int64_t tmp;
         memcpy(&tmp, &v[i * 2].u, sizeof(tmp));
         printf("%" PRId64 " ", tmp);
         break;
      }
      case GLSL_TYPE_FLOAT:
	 printf("%g ", v[i].f);
	 break;
      case GLSL_TYPE_DOUBLE: {
         double tmp;
         memcpy(&tmp, &v[i * 2].f, sizeof(tmp));
         printf("%g ", tmp);
         break;
      }
      default:
	 assert(!"Should not get here.");
	 break;
      }
   }
   printf("\n");
   fflush(stdout);
}

#if 0
static void
log_program_parameters(const struct gl_shader_program *shProg)
{
   for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) {
      if (shProg->_LinkedShaders[i] == NULL)
	 continue;

      const struct gl_program *const prog = shProg->_LinkedShaders[i]->Program;

      printf("Program %d %s shader parameters:\n",
             shProg->Name, _mesa_shader_stage_to_string(i));
      for (unsigned j = 0; j < prog->Parameters->NumParameters; j++) {
         unsigned pvo = prog->Parameters->ParameterValueOffset[j];
         printf("%s: %u %p %f %f %f %f\n",
		prog->Parameters->Parameters[j].Name,
                pvo,
                prog->Parameters->ParameterValues + pvo,
                prog->Parameters->ParameterValues[pvo].f,
                prog->Parameters->ParameterValues[pvo + 1].f,
                prog->Parameters->ParameterValues[pvo + 2].f,
                prog->Parameters->ParameterValues[pvo + 3].f);
      }
   }
   fflush(stdout);
}
#endif

/**
 * Propagate some values from uniform backing storage to driver storage
 *
 * Values propagated from uniform backing storage to driver storage
 * have all format / type conversions previously requested by the
 * driver applied.  This function is most often called by the
 * implementations of \c glUniform1f, etc. and \c glUniformMatrix2f,
 * etc.
 *
 * \param uni          Uniform whose data is to be propagated to driver storage
 * \param array_index  If \c uni is an array, this is the element of
 *                     the array to be propagated.
 * \param count        Number of array elements to propagate.
 */
extern "C" void
_mesa_propagate_uniforms_to_driver_storage(struct gl_uniform_storage *uni,
					   unsigned array_index,
					   unsigned count)
{
   unsigned i;

   const unsigned components = uni->type->vector_elements;
   const unsigned vectors = uni->type->matrix_columns;
   const int dmul = uni->type->is_64bit() ? 2 : 1;

   /* Store the data in the driver's requested type in the driver's storage
    * areas.
    */
   unsigned src_vector_byte_stride = components * 4 * dmul;

   for (i = 0; i < uni->num_driver_storage; i++) {
      struct gl_uniform_driver_storage *const store = &uni->driver_storage[i];
      uint8_t *dst = (uint8_t *) store->data;
      const unsigned extra_stride =
	 store->element_stride - (vectors * store->vector_stride);
      const uint8_t *src =
	 (uint8_t *) (&uni->storage[array_index * (dmul * components * vectors)].i);

#if 0
      printf("%s: %p[%d] components=%u vectors=%u count=%u vector_stride=%u "
	     "extra_stride=%u\n",
	     __func__, dst, array_index, components,
	     vectors, count, store->vector_stride, extra_stride);
#endif

      dst += array_index * store->element_stride;

      switch (store->format) {
      case uniform_native: {
	 unsigned j;
	 unsigned v;

	 if (src_vector_byte_stride == store->vector_stride) {
	    if (extra_stride) {
	       for (j = 0; j < count; j++) {
	          memcpy(dst, src, src_vector_byte_stride * vectors);
	          src += src_vector_byte_stride * vectors;
	          dst += store->vector_stride * vectors;

	          dst += extra_stride;
	       }
	    } else {
	       /* Unigine Heaven benchmark gets here */
	       memcpy(dst, src, src_vector_byte_stride * vectors * count);
	       src += src_vector_byte_stride * vectors * count;
	       dst += store->vector_stride * vectors * count;
	    }
	 } else {
	    for (j = 0; j < count; j++) {
	       for (v = 0; v < vectors; v++) {
	          memcpy(dst, src, src_vector_byte_stride);
	          src += src_vector_byte_stride;
	          dst += store->vector_stride;
	       }

	       dst += extra_stride;
	    }
	 }
	 break;
      }

      case uniform_int_float: {
	 const int *isrc = (const int *) src;
	 unsigned j;
	 unsigned v;
	 unsigned c;

	 for (j = 0; j < count; j++) {
	    for (v = 0; v < vectors; v++) {
	       for (c = 0; c < components; c++) {
		  ((float *) dst)[c] = (float) *isrc;
		  isrc++;
	       }

	       dst += store->vector_stride;
	    }

	    dst += extra_stride;
	 }
	 break;
      }

      default:
	 assert(!"Should not get here.");
	 break;
      }
   }
}


/**
 * Return printable string for a given GLSL_TYPE_x
 */
static const char *
glsl_type_name(enum glsl_base_type type)
{
   switch (type) {
   case GLSL_TYPE_UINT:
      return "uint";
   case GLSL_TYPE_INT:
      return "int";
   case GLSL_TYPE_FLOAT:
      return "float";
   case GLSL_TYPE_DOUBLE:
      return "double";
   case GLSL_TYPE_UINT64:
      return "uint64";
   case GLSL_TYPE_INT64:
      return "int64";
   case GLSL_TYPE_BOOL:
      return "bool";
   case GLSL_TYPE_SAMPLER:
      return "sampler";
   case GLSL_TYPE_IMAGE:
      return "image";
   case GLSL_TYPE_ATOMIC_UINT:
      return "atomic_uint";
   case GLSL_TYPE_STRUCT:
      return "struct";
   case GLSL_TYPE_INTERFACE:
      return "interface";
   case GLSL_TYPE_ARRAY:
      return "array";
   case GLSL_TYPE_VOID:
      return "void";
   case GLSL_TYPE_ERROR:
      return "error";
   default:
      return "other";
   }
}


static struct gl_uniform_storage *
validate_uniform(GLint location, GLsizei count, const GLvoid *values,
                 unsigned *offset, struct gl_context *ctx,
                 struct gl_shader_program *shProg,
                 enum glsl_base_type basicType, unsigned src_components)
{
   struct gl_uniform_storage *const uni =
      validate_uniform_parameters(location, count, offset,
                                  ctx, shProg, "glUniform");
   if (uni == NULL)
      return NULL;

   if (uni->type->is_matrix()) {
      /* Can't set matrix uniforms (like mat4) with glUniform */
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glUniform%u(uniform \"%s\"@%d is matrix)",
                  src_components, uni->name, location);
      return NULL;
   }

   /* Verify that the types are compatible. */
   const unsigned components = uni->type->vector_elements;

   if (components != src_components) {
      /* glUniformN() must match float/vecN type */
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glUniform%u(\"%s\"@%u has %u components, not %u)",
                  src_components, uni->name, location,
                  components, src_components);
      return NULL;
   }

   bool match;
   switch (uni->type->base_type) {
   case GLSL_TYPE_BOOL:
      match = (basicType != GLSL_TYPE_DOUBLE);
      break;
   case GLSL_TYPE_SAMPLER:
      match = (basicType == GLSL_TYPE_INT);
      break;
   case GLSL_TYPE_IMAGE:
      match = (basicType == GLSL_TYPE_INT && _mesa_is_desktop_gl(ctx));
      break;
   default:
      match = (basicType == uni->type->base_type);
      break;
   }

   if (!match) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glUniform%u(\"%s\"@%d is %s, not %s)",
                  src_components, uni->name, location,
                  glsl_type_name(uni->type->base_type),
                  glsl_type_name(basicType));
      return NULL;
   }

   if (unlikely(ctx->_Shader->Flags & GLSL_UNIFORMS)) {
      log_uniform(values, basicType, components, 1, count,
                  false, shProg, location, uni);
   }

   /* Page 100 (page 116 of the PDF) of the OpenGL 3.0 spec says:
    *
    *     "Setting a sampler's value to i selects texture image unit number
    *     i. The values of i range from zero to the implementation- dependent
    *     maximum supported number of texture image units."
    *
    * In addition, table 2.3, "Summary of GL errors," on page 17 (page 33 of
    * the PDF) says:
    *
    *     "Error         Description                    Offending command
    *                                                   ignored?
    *     ...
    *     INVALID_VALUE  Numeric argument out of range  Yes"
    *
    * Based on that, when an invalid sampler is specified, we generate a
    * GL_INVALID_VALUE error and ignore the command.
    */
   if (uni->type->is_sampler()) {
      for (int i = 0; i < count; i++) {
         const unsigned texUnit = ((unsigned *) values)[i];

         /* check that the sampler (tex unit index) is legal */
         if (texUnit >= ctx->Const.MaxCombinedTextureImageUnits) {
            _mesa_error(ctx, GL_INVALID_VALUE,
                        "glUniform1i(invalid sampler/tex unit index for "
                        "uniform %d)", location);
            return NULL;
         }
      }
      /* We need to reset the validate flag on changes to samplers in case
       * two different sampler types are set to the same texture unit.
       */
      ctx->_Shader->Validated = GL_FALSE;
   }

   if (uni->type->is_image()) {
      for (int i = 0; i < count; i++) {
         const int unit = ((GLint *) values)[i];

         /* check that the image unit is legal */
         if (unit < 0 || unit >= (int)ctx->Const.MaxImageUnits) {
            _mesa_error(ctx, GL_INVALID_VALUE,
                        "glUniform1i(invalid image unit index for uniform %d)",
                        location);
            return NULL;
         }
      }
   }

   return uni;
}

void
_mesa_flush_vertices_for_uniforms(struct gl_context *ctx,
                                  const struct gl_uniform_storage *uni)
{
   /* Opaque uniforms have no storage unless they are bindless */
   if (!uni->is_bindless && uni->type->contains_opaque()) {
      FLUSH_VERTICES(ctx, 0);
      return;
   }

   uint64_t new_driver_state = 0;
   unsigned mask = uni->active_shader_mask;

   while (mask) {
      unsigned index = u_bit_scan(&mask);

      assert(index < MESA_SHADER_STAGES);
      new_driver_state |= ctx->DriverFlags.NewShaderConstants[index];
   }

   FLUSH_VERTICES(ctx, new_driver_state ? 0 : _NEW_PROGRAM_CONSTANTS);
   ctx->NewDriverState |= new_driver_state;
}

/**
 * Called via glUniform*() functions.
 */
extern "C" void
_mesa_uniform(GLint location, GLsizei count, const GLvoid *values,
              struct gl_context *ctx, struct gl_shader_program *shProg,
              enum glsl_base_type basicType, unsigned src_components)
{
   unsigned offset;
   int size_mul = glsl_base_type_is_64bit(basicType) ? 2 : 1;

   struct gl_uniform_storage *uni;
   if (_mesa_is_no_error_enabled(ctx)) {
      /* From Seciton 7.6 (UNIFORM VARIABLES) of the OpenGL 4.5 spec:
       *
       *   "If the value of location is -1, the Uniform* commands will
       *   silently ignore the data passed in, and the current uniform values
       *   will not be changed.
       */
      if (location == -1)
         return;

      uni = shProg->UniformRemapTable[location];

      /* The array index specified by the uniform location is just the
       * uniform location minus the base location of of the uniform.
       */
      assert(uni->array_elements > 0 || location == (int)uni->remap_location);
      offset = location - uni->remap_location;
   } else {
      uni = validate_uniform(location, count, values, &offset, ctx, shProg,
                             basicType, src_components);
      if (!uni)
         return;
   }

   const unsigned components = uni->type->vector_elements;

   /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says:
    *
    *     "When loading N elements starting at an arbitrary position k in a
    *     uniform declared as an array, elements k through k + N - 1 in the
    *     array will be replaced with the new values. Values for any array
    *     element that exceeds the highest array element index used, as
    *     reported by GetActiveUniform, will be ignored by the GL."
    *
    * Clamp 'count' to a valid value.  Note that for non-arrays a count > 1
    * will have already generated an error.
    */
   if (uni->array_elements != 0) {
      count = MIN2(count, (int) (uni->array_elements - offset));
   }

   /* We check samplers for changes and flush if needed in the sampler
    * handling code further down, so just skip them here.
    */
   if (!uni->type->is_sampler()) {
       _mesa_flush_vertices_for_uniforms(ctx, uni);
   }

   /* Store the data in the "actual type" backing storage for the uniform.
    */
   if (!uni->type->is_boolean() && !uni->is_bindless) {
      memcpy(&uni->storage[size_mul * components * offset], values,
             sizeof(uni->storage[0]) * components * count * size_mul);
   } else if (uni->is_bindless) {
      const union gl_constant_value *src =
         (const union gl_constant_value *) values;
      GLuint64 *dst = (GLuint64 *)&uni->storage[components * offset].i;
      const unsigned elems = components * count;

      for (unsigned i = 0; i < elems; i++) {
         dst[i] = src[i].i;
      }
   } else {
      const union gl_constant_value *src =
         (const union gl_constant_value *) values;
      union gl_constant_value *dst = &uni->storage[components * offset];
      const unsigned elems = components * count;

      for (unsigned i = 0; i < elems; i++) {
         if (basicType == GLSL_TYPE_FLOAT) {
            dst[i].i = src[i].f != 0.0f ? ctx->Const.UniformBooleanTrue : 0;
         } else {
            dst[i].i = src[i].i != 0    ? ctx->Const.UniformBooleanTrue : 0;
         }
      }
   }

   _mesa_propagate_uniforms_to_driver_storage(uni, offset, count);

   /* If the uniform is a sampler, do the extra magic necessary to propagate
    * the changes through.
    */
   if (uni->type->is_sampler()) {
      bool flushed = false;

      shProg->SamplersValidated = GL_TRUE;

      for (int i = 0; i < MESA_SHADER_STAGES; i++) {
         struct gl_linked_shader *const sh = shProg->_LinkedShaders[i];

         /* If the shader stage doesn't use the sampler uniform, skip this. */
         if (!uni->opaque[i].active)
            continue;

         bool changed = false;
         for (int j = 0; j < count; j++) {
            unsigned unit = uni->opaque[i].index + offset + j;
            unsigned value = ((unsigned *)values)[j];

            if (uni->is_bindless) {
               struct gl_bindless_sampler *sampler =
                  &sh->Program->sh.BindlessSamplers[unit];

               /* Mark this bindless sampler as bound to a texture unit.
                */
               if (sampler->unit != value || !sampler->bound) {
                  sampler->unit = value;
                  changed = true;
               }
               sampler->bound = true;
               sh->Program->sh.HasBoundBindlessSampler = true;
            } else {
               if (sh->Program->SamplerUnits[unit] != value) {
                  sh->Program->SamplerUnits[unit] = value;
                  changed = true;
               }
            }
         }

         if (changed) {
            if (!flushed) {
               FLUSH_VERTICES(ctx, _NEW_TEXTURE_OBJECT | _NEW_PROGRAM);
               flushed = true;
            }

            struct gl_program *const prog = sh->Program;
            _mesa_update_shader_textures_used(shProg, prog);
            if (ctx->Driver.SamplerUniformChange)
               ctx->Driver.SamplerUniformChange(ctx, prog->Target, prog);
         }
      }
   }

   /* If the uniform is an image, update the mapping from image
    * uniforms to image units present in the shader data structure.
    */
   if (uni->type->is_image()) {
      for (int i = 0; i < MESA_SHADER_STAGES; i++) {
         struct gl_linked_shader *sh = shProg->_LinkedShaders[i];

         /* If the shader stage doesn't use the image uniform, skip this. */
         if (!uni->opaque[i].active)
            continue;

         for (int j = 0; j < count; j++) {
            unsigned unit = uni->opaque[i].index + offset + j;
            unsigned value = ((unsigned *)values)[j];

            if (uni->is_bindless) {
               struct gl_bindless_image *image =
                  &sh->Program->sh.BindlessImages[unit];

               /* Mark this bindless image as bound to an image unit.
                */
               image->unit = value;
               image->bound = true;
               sh->Program->sh.HasBoundBindlessImage = true;
            } else {
               sh->Program->sh.ImageUnits[unit] = value;
            }
         }
      }

      ctx->NewDriverState |= ctx->DriverFlags.NewImageUnits;
   }
}

/**
 * Called by glUniformMatrix*() functions.
 * Note: cols=2, rows=4  ==>  array[2] of vec4
 */
extern "C" void
_mesa_uniform_matrix(GLint location, GLsizei count,
                     GLboolean transpose, const void *values,
                     struct gl_context *ctx, struct gl_shader_program *shProg,
                     GLuint cols, GLuint rows, enum glsl_base_type basicType)
{
   unsigned offset;
   struct gl_uniform_storage *const uni =
      validate_uniform_parameters(location, count, &offset,
                                  ctx, shProg, "glUniformMatrix");
   if (uni == NULL)
      return;

   if (!uni->type->is_matrix()) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
		  "glUniformMatrix(non-matrix uniform)");
      return;
   }

   assert(basicType == GLSL_TYPE_FLOAT || basicType == GLSL_TYPE_DOUBLE);
   const unsigned size_mul = basicType == GLSL_TYPE_DOUBLE ? 2 : 1;

   assert(!uni->type->is_sampler());
   const unsigned vectors = uni->type->matrix_columns;
   const unsigned components = uni->type->vector_elements;

   /* Verify that the types are compatible.  This is greatly simplified for
    * matrices because they can only have a float base type.
    */
   if (vectors != cols || components != rows) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
		  "glUniformMatrix(matrix size mismatch)");
      return;
   }

   /* GL_INVALID_VALUE is generated if `transpose' is not GL_FALSE.
    * http://www.khronos.org/opengles/sdk/docs/man/xhtml/glUniform.xml
    */
   if (transpose) {
      if (ctx->API == API_OPENGLES2 && ctx->Version < 30) {
	 _mesa_error(ctx, GL_INVALID_VALUE,
		     "glUniformMatrix(matrix transpose is not GL_FALSE)");
	 return;
      }
   }

   /* Section 2.11.7 (Uniform Variables) of the OpenGL 4.2 Core Profile spec
    * says:
    *
    *     "If any of the following conditions occur, an INVALID_OPERATION
    *     error is generated by the Uniform* commands, and no uniform values
    *     are changed:
    *
    *     ...
    *
    *     - if the uniform declared in the shader is not of type boolean and
    *       the type indicated in the name of the Uniform* command used does
    *       not match the type of the uniform"
    *
    * There are no Boolean matrix types, so we do not need to allow
    * GLSL_TYPE_BOOL here (as _mesa_uniform does).
    */
   if (uni->type->base_type != basicType) {
      _mesa_error(ctx, GL_INVALID_OPERATION,
                  "glUniformMatrix%ux%u(\"%s\"@%d is %s, not %s)",
                  cols, rows, uni->name, location,
                  glsl_type_name(uni->type->base_type),
                  glsl_type_name(basicType));
      return;
   }

   if (unlikely(ctx->_Shader->Flags & GLSL_UNIFORMS)) {
      log_uniform(values, uni->type->base_type, components, vectors, count,
		  bool(transpose), shProg, location, uni);
   }

   /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says:
    *
    *     "When loading N elements starting at an arbitrary position k in a
    *     uniform declared as an array, elements k through k + N - 1 in the
    *     array will be replaced with the new values. Values for any array
    *     element that exceeds the highest array element index used, as
    *     reported by GetActiveUniform, will be ignored by the GL."
    *
    * Clamp 'count' to a valid value.  Note that for non-arrays a count > 1
    * will have already generated an error.
    */
   if (uni->array_elements != 0) {
      count = MIN2(count, (int) (uni->array_elements - offset));
   }

   _mesa_flush_vertices_for_uniforms(ctx, uni);

   /* Store the data in the "actual type" backing storage for the uniform.
    */
   const unsigned elements = components * vectors;

   if (!transpose) {
      memcpy(&uni->storage[size_mul * elements * offset], values,
	     sizeof(uni->storage[0]) * elements * count * size_mul);
   } else if (basicType == GLSL_TYPE_FLOAT) {
      /* Copy and transpose the matrix.
       */
      const float *src = (const float *)values;
      float *dst = &uni->storage[elements * offset].f;

      for (int i = 0; i < count; i++) {
	 for (unsigned r = 0; r < rows; r++) {
	    for (unsigned c = 0; c < cols; c++) {
	       dst[(c * components) + r] = src[c + (r * vectors)];
	    }
	 }

	 dst += elements;
	 src += elements;
      }
   } else {
      assert(basicType == GLSL_TYPE_DOUBLE);
      const double *src = (const double *)values;
      double *dst = (double *)&uni->storage[elements * offset].f;

      for (int i = 0; i < count; i++) {
	 for (unsigned r = 0; r < rows; r++) {
	    for (unsigned c = 0; c < cols; c++) {
	       dst[(c * components) + r] = src[c + (r * vectors)];
	    }
	 }

	 dst += elements;
	 src += elements;
      }
   }

   _mesa_propagate_uniforms_to_driver_storage(uni, offset, count);
}

static void
update_bound_bindless_sampler_flag(struct gl_program *prog)
{
   unsigned i;

   if (likely(!prog->sh.HasBoundBindlessSampler))
      return;

   for (i = 0; i < prog->sh.NumBindlessSamplers; i++) {
      struct gl_bindless_sampler *sampler = &prog->sh.BindlessSamplers[i];

      if (sampler->bound)
         return;
   }
   prog->sh.HasBoundBindlessSampler = false;
}

static void
update_bound_bindless_image_flag(struct gl_program *prog)
{
   unsigned i;

   if (likely(!prog->sh.HasBoundBindlessImage))
      return;

   for (i = 0; i < prog->sh.NumBindlessImages; i++) {
      struct gl_bindless_image *image = &prog->sh.BindlessImages[i];

      if (image->bound)
         return;
   }
   prog->sh.HasBoundBindlessImage = false;
}

/**
 * Called via glUniformHandleui64*ARB() functions.
 */
extern "C" void
_mesa_uniform_handle(GLint location, GLsizei count, const GLvoid *values,
                     struct gl_context *ctx, struct gl_shader_program *shProg)
{
   unsigned offset;
   struct gl_uniform_storage *uni;

   if (_mesa_is_no_error_enabled(ctx)) {
      /* From Section 7.6 (UNIFORM VARIABLES) of the OpenGL 4.5 spec:
       *
       *   "If the value of location is -1, the Uniform* commands will
       *   silently ignore the data passed in, and the current uniform values
       *   will not be changed.
       */
      if (location == -1)
         return;

      uni = shProg->UniformRemapTable[location];

      /* The array index specified by the uniform location is just the
       * uniform location minus the base location of of the uniform.
       */
      assert(uni->array_elements > 0 || location == (int)uni->remap_location);
      offset = location - uni->remap_location;
   } else {
      uni = validate_uniform_parameters(location, count, &offset,
                                        ctx, shProg, "glUniformHandleui64*ARB");
      if (!uni)
         return;

      if (!uni->is_bindless) {
         /* From section "Errors" of the ARB_bindless_texture spec:
          *
          * "The error INVALID_OPERATION is generated by
          *  UniformHandleui64{v}ARB if the sampler or image uniform being
          *  updated has the "bound_sampler" or "bound_image" layout qualifier."
          *
          * From section 4.4.6 of the ARB_bindless_texture spec:
          *
          * "In the absence of these qualifiers, sampler and image uniforms are
          *  considered "bound". Additionally, if GL_ARB_bindless_texture is
          *  not enabled, these uniforms are considered "bound"."
          */
         _mesa_error(ctx, GL_INVALID_OPERATION,
                     "glUniformHandleui64*ARB(non-bindless sampler/image uniform)");
         return;
      }
   }

   const unsigned components = uni->type->vector_elements;
   const int size_mul = 2;

   if (unlikely(ctx->_Shader->Flags & GLSL_UNIFORMS)) {
      log_uniform(values, GLSL_TYPE_UINT64, components, 1, count,
                  false, shProg, location, uni);
   }

   /* Page 82 (page 96 of the PDF) of the OpenGL 2.1 spec says:
    *
    *     "When loading N elements starting at an arbitrary position k in a
    *     uniform declared as an array, elements k through k + N - 1 in the
    *     array will be replaced with the new values. Values for any array
    *     element that exceeds the highest array element index used, as
    *     reported by GetActiveUniform, will be ignored by the GL."
    *
    * Clamp 'count' to a valid value.  Note that for non-arrays a count > 1
    * will have already generated an error.
    */
   if (uni->array_elements != 0) {
      count = MIN2(count, (int) (uni->array_elements - offset));
   }

   _mesa_flush_vertices_for_uniforms(ctx, uni);

   /* Store the data in the "actual type" backing storage for the uniform.
    */
   memcpy(&uni->storage[size_mul * components * offset], values,
          sizeof(uni->storage[0]) * components * count * size_mul);

   _mesa_propagate_uniforms_to_driver_storage(uni, offset, count);

   if (uni->type->is_sampler()) {
      /* Mark this bindless sampler as not bound to a texture unit because
       * it refers to a texture handle.
       */
      for (int i = 0; i < MESA_SHADER_STAGES; i++) {
         struct gl_linked_shader *const sh = shProg->_LinkedShaders[i];

         /* If the shader stage doesn't use the sampler uniform, skip this. */
         if (!uni->opaque[i].active)
            continue;

         for (int j = 0; j < count; j++) {
            unsigned unit = uni->opaque[i].index + offset + j;
            struct gl_bindless_sampler *sampler =
               &sh->Program->sh.BindlessSamplers[unit];

            sampler->bound = false;
         }

         update_bound_bindless_sampler_flag(sh->Program);
      }
   }

   if (uni->type->is_image()) {
      /* Mark this bindless image as not bound to an image unit because it
       * refers to a texture handle.
       */
      for (int i = 0; i < MESA_SHADER_STAGES; i++) {
         struct gl_linked_shader *sh = shProg->_LinkedShaders[i];

         /* If the shader stage doesn't use the sampler uniform, skip this. */
         if (!uni->opaque[i].active)
            continue;

         for (int j = 0; j < count; j++) {
            unsigned unit = uni->opaque[i].index + offset + j;
            struct gl_bindless_image *image =
               &sh->Program->sh.BindlessImages[unit];

            image->bound = false;
         }

         update_bound_bindless_image_flag(sh->Program);
      }
   }
}

extern "C" bool
_mesa_sampler_uniforms_are_valid(const struct gl_shader_program *shProg,
				 char *errMsg, size_t errMsgLength)
{
   /* Shader does not have samplers. */
   if (shProg->data->NumUniformStorage == 0)
      return true;

   if (!shProg->SamplersValidated) {
      _mesa_snprintf(errMsg, errMsgLength,
                     "active samplers with a different type "
                     "refer to the same texture image unit");
      return false;
   }
   return true;
}

extern "C" bool
_mesa_sampler_uniforms_pipeline_are_valid(struct gl_pipeline_object *pipeline)
{
   /* Section 2.11.11 (Shader Execution), subheading "Validation," of the
    * OpenGL 4.1 spec says:
    *
    *     "[INVALID_OPERATION] is generated by any command that transfers
    *     vertices to the GL if:
    *
    *         ...
    *
    *         - Any two active samplers in the current program object are of
    *           different types, but refer to the same texture image unit.
    *
    *         - The number of active samplers in the program exceeds the
    *           maximum number of texture image units allowed."
    */

   GLbitfield mask;
   GLbitfield TexturesUsed[MAX_COMBINED_TEXTURE_IMAGE_UNITS];
   unsigned active_samplers = 0;
   const struct gl_program **prog =
      (const struct gl_program **) pipeline->CurrentProgram;


   memset(TexturesUsed, 0, sizeof(TexturesUsed));

   for (unsigned idx = 0; idx < ARRAY_SIZE(pipeline->CurrentProgram); idx++) {
      if (!prog[idx])
         continue;

      mask = prog[idx]->SamplersUsed;
      while (mask) {
         const int s = u_bit_scan(&mask);
         GLuint unit = prog[idx]->SamplerUnits[s];
         GLuint tgt = prog[idx]->sh.SamplerTargets[s];

         /* FIXME: Samplers are initialized to 0 and Mesa doesn't do a
          * great job of eliminating unused uniforms currently so for now
          * don't throw an error if two sampler types both point to 0.
          */
         if (unit == 0)
            continue;

         if (TexturesUsed[unit] & ~(1 << tgt)) {
            pipeline->InfoLog =
               ralloc_asprintf(pipeline,
                     "Program %d: "
                     "Texture unit %d is accessed with 2 different types",
                     prog[idx]->Id, unit);
            return false;
         }

         TexturesUsed[unit] |= (1 << tgt);
      }

      active_samplers += prog[idx]->info.num_textures;
   }

   if (active_samplers > MAX_COMBINED_TEXTURE_IMAGE_UNITS) {
      pipeline->InfoLog =
         ralloc_asprintf(pipeline,
                         "the number of active samplers %d exceed the "
                         "maximum %d",
                         active_samplers, MAX_COMBINED_TEXTURE_IMAGE_UNITS);
      return false;
   }

   return true;
}