summaryrefslogtreecommitdiff
path: root/src/gallium/auxiliary/cso_cache/cso_context.c
blob: 80bd0c91db0c145fa72894854d0e44ba2a08d387 (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
/**************************************************************************
 *
 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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 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 TUNGSTEN GRAPHICS AND/OR ITS 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.
 *
 **************************************************************************/

 /**
  * @file
  * 
  * Wrap the cso cache & hash mechanisms in a simplified
  * pipe-driver-specific interface.
  *
  * @author Zack Rusin <zack@tungstengraphics.com>
  * @author Keith Whitwell <keith@tungstengraphics.com>
  */

#include "pipe/p_state.h"
#include "util/u_memory.h"
#include "tgsi/tgsi_parse.h"

#include "cso_cache/cso_context.h"
#include "cso_cache/cso_cache.h"
#include "cso_cache/cso_hash.h"

struct cso_context {
   struct pipe_context *pipe;
   struct cso_cache *cache;

   struct {
      void *samplers[PIPE_MAX_SAMPLERS];
      unsigned nr_samplers;

      void *vertex_samplers[PIPE_MAX_VERTEX_SAMPLERS];
      unsigned nr_vertex_samplers;
   } hw;

   void *samplers[PIPE_MAX_SAMPLERS];
   unsigned nr_samplers;

   void *vertex_samplers[PIPE_MAX_VERTEX_SAMPLERS];
   unsigned nr_vertex_samplers;

   unsigned nr_samplers_saved;
   void *samplers_saved[PIPE_MAX_SAMPLERS];

   unsigned nr_vertex_samplers_saved;
   void *vertex_samplers_saved[PIPE_MAX_VERTEX_SAMPLERS];

   struct pipe_texture *textures[PIPE_MAX_SAMPLERS];
   uint nr_textures;

   struct pipe_texture *vertex_textures[PIPE_MAX_VERTEX_SAMPLERS];
   uint nr_vertex_textures;

   uint nr_textures_saved;
   struct pipe_texture *textures_saved[PIPE_MAX_SAMPLERS];

   uint nr_vertex_textures_saved;
   struct pipe_texture *vertex_textures_saved[PIPE_MAX_SAMPLERS];

   /** Current and saved state.
    * The saved state is used as a 1-deep stack.
    */
   void *blend, *blend_saved;
   void *depth_stencil, *depth_stencil_saved;
   void *rasterizer, *rasterizer_saved;
   void *fragment_shader, *fragment_shader_saved;
   void *vertex_shader, *vertex_shader_saved;

   struct pipe_framebuffer_state fb, fb_saved;
   struct pipe_viewport_state vp, vp_saved;
   struct pipe_blend_color blend_color;
};


static void
free_framebuffer_state(struct pipe_framebuffer_state *fb);


static boolean delete_blend_state(struct cso_context *ctx, void *state)
{
   struct cso_blend *cso = (struct cso_blend *)state;

   if (ctx->blend == cso->data)
      return FALSE;

   if (cso->delete_state)
      cso->delete_state(cso->context, cso->data);
   FREE(state);
   return TRUE;
}

static boolean delete_depth_stencil_state(struct cso_context *ctx, void *state)
{
   struct cso_depth_stencil_alpha *cso = (struct cso_depth_stencil_alpha *)state;

   if (ctx->depth_stencil == cso->data)
      return FALSE;

   if (cso->delete_state)
      cso->delete_state(cso->context, cso->data);
   FREE(state);

   return TRUE;
}

static boolean delete_sampler_state(struct cso_context *ctx, void *state)
{
   struct cso_sampler *cso = (struct cso_sampler *)state;
   if (cso->delete_state)
      cso->delete_state(cso->context, cso->data);
   FREE(state);
   return TRUE;
}

static boolean delete_rasterizer_state(struct cso_context *ctx, void *state)
{
   struct cso_rasterizer *cso = (struct cso_rasterizer *)state;

   if (ctx->rasterizer == cso->data)
      return FALSE;
   if (cso->delete_state)
      cso->delete_state(cso->context, cso->data);
   FREE(state);
   return TRUE;
}

static boolean delete_fs_state(struct cso_context *ctx, void *state)
{
   struct cso_fragment_shader *cso = (struct cso_fragment_shader *)state;
   if (ctx->fragment_shader == cso->data)
      return FALSE;
   if (cso->delete_state)
      cso->delete_state(cso->context, cso->data);
   FREE(state);
   return TRUE;
}

static boolean delete_vs_state(struct cso_context *ctx, void *state)
{
   struct cso_vertex_shader *cso = (struct cso_vertex_shader *)state;
   if (ctx->vertex_shader == cso->data)
      return TRUE;
   if (cso->delete_state)
      cso->delete_state(cso->context, cso->data);
   FREE(state);
   return FALSE;
}


static INLINE boolean delete_cso(struct cso_context *ctx,
                                 void *state, enum cso_cache_type type)
{
   switch (type) {
   case CSO_BLEND:
      return delete_blend_state(ctx, state);
      break;
   case CSO_SAMPLER:
      return delete_sampler_state(ctx, state);
      break;
   case CSO_DEPTH_STENCIL_ALPHA:
      return delete_depth_stencil_state(ctx, state);
      break;
   case CSO_RASTERIZER:
      return delete_rasterizer_state(ctx, state);
      break;
   case CSO_FRAGMENT_SHADER:
      return delete_fs_state(ctx, state);
      break;
   case CSO_VERTEX_SHADER:
      return delete_vs_state(ctx, state);
      break;
   default:
      assert(0);
      FREE(state);
   }
   return FALSE;
}

static INLINE void sanitize_hash(struct cso_hash *hash, enum cso_cache_type type,
                                 int max_size, void *user_data)
{
   struct cso_context *ctx = (struct cso_context *)user_data;
   /* if we're approach the maximum size, remove fourth of the entries
    * otherwise every subsequent call will go through the same */
   int hash_size = cso_hash_size(hash);
   int max_entries = (max_size > hash_size) ? max_size : hash_size;
   int to_remove =  (max_size < max_entries) * max_entries/4;
   struct cso_hash_iter iter = cso_hash_first_node(hash);
   if (hash_size > max_size)
      to_remove += hash_size - max_size;
   while (to_remove) {
      /*remove elements until we're good */
      /*fixme: currently we pick the nodes to remove at random*/
      void *cso = cso_hash_iter_data(iter);
      if (delete_cso(ctx, cso, type)) {
         iter = cso_hash_erase(hash, iter);
         --to_remove;
      } else
         iter = cso_hash_iter_next(iter);
   }
}


struct cso_context *cso_create_context( struct pipe_context *pipe )
{
   struct cso_context *ctx = CALLOC_STRUCT(cso_context);
   if (ctx == NULL)
      goto out;

   ctx->cache = cso_cache_create();
   if (ctx->cache == NULL)
      goto out;
   cso_cache_set_sanitize_callback(ctx->cache,
                                   sanitize_hash,
                                   ctx);

   ctx->pipe = pipe;

   /* Enable for testing: */
   if (0) cso_set_maximum_cache_size( ctx->cache, 4 );

   return ctx;

out:
   cso_destroy_context( ctx );      
   return NULL;
}


/**
 * Prior to context destruction, this function unbinds all state objects.
 */
void cso_release_all( struct cso_context *ctx )
{
   unsigned i;
   
   if (ctx->pipe) {
      ctx->pipe->bind_blend_state( ctx->pipe, NULL );
      ctx->pipe->bind_rasterizer_state( ctx->pipe, NULL );
      ctx->pipe->bind_fragment_sampler_states( ctx->pipe, 0, NULL );
      if (ctx->pipe->bind_vertex_sampler_states)
         ctx->pipe->bind_vertex_sampler_states(ctx->pipe, 0, NULL);
      ctx->pipe->bind_depth_stencil_alpha_state( ctx->pipe, NULL );
      ctx->pipe->bind_fs_state( ctx->pipe, NULL );
      ctx->pipe->bind_vs_state( ctx->pipe, NULL );
   }

   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
      pipe_texture_reference(&ctx->textures[i], NULL);
      pipe_texture_reference(&ctx->textures_saved[i], NULL);
   }

   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
      pipe_texture_reference(&ctx->vertex_textures[i], NULL);
      pipe_texture_reference(&ctx->vertex_textures_saved[i], NULL);
   }

   free_framebuffer_state(&ctx->fb);
   free_framebuffer_state(&ctx->fb_saved);

   if (ctx->cache) {
      cso_cache_delete( ctx->cache );
      ctx->cache = NULL;
   }
}


void cso_destroy_context( struct cso_context *ctx )
{
   if (ctx) {
      /*cso_release_all( ctx );*/
      FREE( ctx );
   }
}


/* Those function will either find the state of the given template
 * in the cache or they will create a new state from the given
 * template, insert it in the cache and return it.
 */

/*
 * If the driver returns 0 from the create method then they will assign
 * the data member of the cso to be the template itself.
 */

enum pipe_error cso_set_blend(struct cso_context *ctx,
                              const struct pipe_blend_state *templ)
{
   unsigned hash_key = cso_construct_key((void*)templ, sizeof(struct pipe_blend_state));
   struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                       hash_key, CSO_BLEND,
                                                       (void*)templ);
   void *handle;

   if (cso_hash_iter_is_null(iter)) {
      struct cso_blend *cso = MALLOC(sizeof(struct cso_blend));
      if (!cso)
         return PIPE_ERROR_OUT_OF_MEMORY;

      memcpy(&cso->state, templ, sizeof(*templ));
      cso->data = ctx->pipe->create_blend_state(ctx->pipe, &cso->state);
      cso->delete_state = (cso_state_callback)ctx->pipe->delete_blend_state;
      cso->context = ctx->pipe;

      iter = cso_insert_state(ctx->cache, hash_key, CSO_BLEND, cso);
      if (cso_hash_iter_is_null(iter)) {
         FREE(cso);
         return PIPE_ERROR_OUT_OF_MEMORY;
      }

      handle = cso->data;
   }
   else {
      handle = ((struct cso_blend *)cso_hash_iter_data(iter))->data;
   }

   if (ctx->blend != handle) {
      ctx->blend = handle;
      ctx->pipe->bind_blend_state(ctx->pipe, handle);
   }
   return PIPE_OK;
}

void cso_save_blend(struct cso_context *ctx)
{
   assert(!ctx->blend_saved);
   ctx->blend_saved = ctx->blend;
}

void cso_restore_blend(struct cso_context *ctx)
{
   if (ctx->blend != ctx->blend_saved) {
      ctx->blend = ctx->blend_saved;
      ctx->pipe->bind_blend_state(ctx->pipe, ctx->blend_saved);
   }
   ctx->blend_saved = NULL;
}



enum pipe_error cso_single_sampler(struct cso_context *ctx,
                                   unsigned idx,
                                   const struct pipe_sampler_state *templ)
{
   void *handle = NULL;

   if (templ != NULL) {
      unsigned hash_key = cso_construct_key((void*)templ, sizeof(struct pipe_sampler_state));
      struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                          hash_key, CSO_SAMPLER,
                                                          (void*)templ);

      if (cso_hash_iter_is_null(iter)) {
         struct cso_sampler *cso = MALLOC(sizeof(struct cso_sampler));
         if (!cso)
            return PIPE_ERROR_OUT_OF_MEMORY;

         memcpy(&cso->state, templ, sizeof(*templ));
         cso->data = ctx->pipe->create_sampler_state(ctx->pipe, &cso->state);
         cso->delete_state = (cso_state_callback)ctx->pipe->delete_sampler_state;
         cso->context = ctx->pipe;

         iter = cso_insert_state(ctx->cache, hash_key, CSO_SAMPLER, cso);
         if (cso_hash_iter_is_null(iter)) {
            FREE(cso);
            return PIPE_ERROR_OUT_OF_MEMORY;
         }

         handle = cso->data;
      }
      else {
         handle = ((struct cso_sampler *)cso_hash_iter_data(iter))->data;
      }
   }

   ctx->samplers[idx] = handle;
   return PIPE_OK;
}

enum pipe_error
cso_single_vertex_sampler(struct cso_context *ctx,
                          unsigned idx,
                          const struct pipe_sampler_state *templ)
{
   void *handle = NULL;

   if (templ != NULL) {
      unsigned hash_key = cso_construct_key((void*)templ, sizeof(struct pipe_sampler_state));
      struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                          hash_key, CSO_SAMPLER,
                                                          (void*)templ);

      if (cso_hash_iter_is_null(iter)) {
         struct cso_sampler *cso = MALLOC(sizeof(struct cso_sampler));
         if (!cso)
            return PIPE_ERROR_OUT_OF_MEMORY;

         memcpy(&cso->state, templ, sizeof(*templ));
         cso->data = ctx->pipe->create_sampler_state(ctx->pipe, &cso->state);
         cso->delete_state = (cso_state_callback)ctx->pipe->delete_sampler_state;
         cso->context = ctx->pipe;

         iter = cso_insert_state(ctx->cache, hash_key, CSO_SAMPLER, cso);
         if (cso_hash_iter_is_null(iter)) {
            FREE(cso);
            return PIPE_ERROR_OUT_OF_MEMORY;
         }

         handle = cso->data;
      }
      else {
         handle = ((struct cso_sampler *)cso_hash_iter_data(iter))->data;
      }
   }

   ctx->vertex_samplers[idx] = handle;
   return PIPE_OK;
}

void cso_single_sampler_done( struct cso_context *ctx )
{
   unsigned i;

   /* find highest non-null sampler */
   for (i = PIPE_MAX_SAMPLERS; i > 0; i--) {
      if (ctx->samplers[i - 1] != NULL)
         break;
   }

   ctx->nr_samplers = i;

   if (ctx->hw.nr_samplers != ctx->nr_samplers ||
       memcmp(ctx->hw.samplers,
              ctx->samplers,
              ctx->nr_samplers * sizeof(void *)) != 0) 
   {
      memcpy(ctx->hw.samplers, ctx->samplers, ctx->nr_samplers * sizeof(void *));
      ctx->hw.nr_samplers = ctx->nr_samplers;

      ctx->pipe->bind_fragment_sampler_states(ctx->pipe, ctx->nr_samplers, ctx->samplers);
   }
}

void
cso_single_vertex_sampler_done(struct cso_context *ctx)
{
   unsigned i;

   /* find highest non-null sampler */
   for (i = PIPE_MAX_VERTEX_SAMPLERS; i > 0; i--) {
      if (ctx->vertex_samplers[i - 1] != NULL)
         break;
   }

   ctx->nr_vertex_samplers = i;

   if (ctx->hw.nr_vertex_samplers != ctx->nr_vertex_samplers ||
       memcmp(ctx->hw.vertex_samplers,
              ctx->vertex_samplers,
              ctx->nr_vertex_samplers * sizeof(void *)) != 0) 
   {
      memcpy(ctx->hw.vertex_samplers,
             ctx->vertex_samplers,
             ctx->nr_vertex_samplers * sizeof(void *));
      ctx->hw.nr_vertex_samplers = ctx->nr_vertex_samplers;

      ctx->pipe->bind_vertex_sampler_states(ctx->pipe,
                                            ctx->nr_vertex_samplers,
                                            ctx->vertex_samplers);
   }
}

/*
 * If the function encouters any errors it will return the
 * last one. Done to always try to set as many samplers
 * as possible.
 */
enum pipe_error cso_set_samplers( struct cso_context *ctx,
                                  unsigned nr,
                                  const struct pipe_sampler_state **templates )
{
   unsigned i;
   enum pipe_error temp, error = PIPE_OK;

   /* TODO: fastpath
    */

   for (i = 0; i < nr; i++) {
      temp = cso_single_sampler( ctx, i, templates[i] );
      if (temp != PIPE_OK)
         error = temp;
   }

   for ( ; i < ctx->nr_samplers; i++) {
      temp = cso_single_sampler( ctx, i, NULL );
      if (temp != PIPE_OK)
         error = temp;
   }

   cso_single_sampler_done( ctx );

   return error;
}

void cso_save_samplers(struct cso_context *ctx)
{
   ctx->nr_samplers_saved = ctx->nr_samplers;
   memcpy(ctx->samplers_saved, ctx->samplers, sizeof(ctx->samplers));
}

void cso_restore_samplers(struct cso_context *ctx)
{
   ctx->nr_samplers = ctx->nr_samplers_saved;
   memcpy(ctx->samplers, ctx->samplers_saved, sizeof(ctx->samplers));
   cso_single_sampler_done( ctx );
}

void
cso_save_vertex_samplers(struct cso_context *ctx)
{
   ctx->nr_vertex_samplers_saved = ctx->nr_vertex_samplers;
   memcpy(ctx->vertex_samplers_saved, ctx->vertex_samplers, sizeof(ctx->vertex_samplers));
}

void
cso_restore_vertex_samplers(struct cso_context *ctx)
{
   ctx->nr_vertex_samplers = ctx->nr_vertex_samplers_saved;
   memcpy(ctx->vertex_samplers, ctx->vertex_samplers_saved, sizeof(ctx->vertex_samplers));
   cso_single_vertex_sampler_done(ctx);
}


enum pipe_error cso_set_sampler_textures( struct cso_context *ctx,
                                          uint count,
                                          struct pipe_texture **textures )
{
   uint i;

   ctx->nr_textures = count;

   for (i = 0; i < count; i++)
      pipe_texture_reference(&ctx->textures[i], textures[i]);
   for ( ; i < PIPE_MAX_SAMPLERS; i++)
      pipe_texture_reference(&ctx->textures[i], NULL);

   ctx->pipe->set_fragment_sampler_textures(ctx->pipe, count, textures);

   return PIPE_OK;
}

void cso_save_sampler_textures( struct cso_context *ctx )
{
   uint i;

   ctx->nr_textures_saved = ctx->nr_textures;
   for (i = 0; i < ctx->nr_textures; i++) {
      assert(!ctx->textures_saved[i]);
      pipe_texture_reference(&ctx->textures_saved[i], ctx->textures[i]);
   }
}

void cso_restore_sampler_textures( struct cso_context *ctx )
{
   uint i;

   ctx->nr_textures = ctx->nr_textures_saved;

   for (i = 0; i < ctx->nr_textures; i++) {
      pipe_texture_reference(&ctx->textures[i], NULL);
      ctx->textures[i] = ctx->textures_saved[i];
      ctx->textures_saved[i] = NULL;
   }
   for ( ; i < PIPE_MAX_SAMPLERS; i++)
      pipe_texture_reference(&ctx->textures[i], NULL);

   ctx->pipe->set_fragment_sampler_textures(ctx->pipe, ctx->nr_textures, ctx->textures);

   ctx->nr_textures_saved = 0;
}



enum pipe_error
cso_set_vertex_sampler_textures(struct cso_context *ctx,
                                uint count,
                                struct pipe_texture **textures)
{
   uint i;

   ctx->nr_vertex_textures = count;

   for (i = 0; i < count; i++) {
      pipe_texture_reference(&ctx->vertex_textures[i], textures[i]);
   }
   for ( ; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
      pipe_texture_reference(&ctx->vertex_textures[i], NULL);
   }

   ctx->pipe->set_vertex_sampler_textures(ctx->pipe, count, textures);

   return PIPE_OK;
}

void
cso_save_vertex_sampler_textures(struct cso_context *ctx)
{
   uint i;

   ctx->nr_vertex_textures_saved = ctx->nr_vertex_textures;
   for (i = 0; i < ctx->nr_vertex_textures; i++) {
      assert(!ctx->vertex_textures_saved[i]);
      pipe_texture_reference(&ctx->vertex_textures_saved[i], ctx->vertex_textures[i]);
   }
}

void
cso_restore_vertex_sampler_textures(struct cso_context *ctx)
{
   uint i;

   ctx->nr_vertex_textures = ctx->nr_vertex_textures_saved;

   for (i = 0; i < ctx->nr_vertex_textures; i++) {
      pipe_texture_reference(&ctx->vertex_textures[i], NULL);
      ctx->vertex_textures[i] = ctx->vertex_textures_saved[i];
      ctx->vertex_textures_saved[i] = NULL;
   }
   for ( ; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
      pipe_texture_reference(&ctx->vertex_textures[i], NULL);
   }

   ctx->pipe->set_vertex_sampler_textures(ctx->pipe,
                                          ctx->nr_vertex_textures,
                                          ctx->vertex_textures);

   ctx->nr_vertex_textures_saved = 0;
}



enum pipe_error cso_set_depth_stencil_alpha(struct cso_context *ctx,
                                            const struct pipe_depth_stencil_alpha_state *templ)
{
   unsigned hash_key = cso_construct_key((void*)templ,
                                         sizeof(struct pipe_depth_stencil_alpha_state));
   struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                       hash_key, 
						       CSO_DEPTH_STENCIL_ALPHA,
                                                       (void*)templ);
   void *handle;

   if (cso_hash_iter_is_null(iter)) {
      struct cso_depth_stencil_alpha *cso = MALLOC(sizeof(struct cso_depth_stencil_alpha));
      if (!cso)
         return PIPE_ERROR_OUT_OF_MEMORY;

      memcpy(&cso->state, templ, sizeof(*templ));
      cso->data = ctx->pipe->create_depth_stencil_alpha_state(ctx->pipe, &cso->state);
      cso->delete_state = (cso_state_callback)ctx->pipe->delete_depth_stencil_alpha_state;
      cso->context = ctx->pipe;

      iter = cso_insert_state(ctx->cache, hash_key, CSO_DEPTH_STENCIL_ALPHA, cso);
      if (cso_hash_iter_is_null(iter)) {
         FREE(cso);
         return PIPE_ERROR_OUT_OF_MEMORY;
      }

      handle = cso->data;
   }
   else {
      handle = ((struct cso_depth_stencil_alpha *)cso_hash_iter_data(iter))->data;
   }

   if (ctx->depth_stencil != handle) {
      ctx->depth_stencil = handle;
      ctx->pipe->bind_depth_stencil_alpha_state(ctx->pipe, handle);
   }
   return PIPE_OK;
}

void cso_save_depth_stencil_alpha(struct cso_context *ctx)
{
   assert(!ctx->depth_stencil_saved);
   ctx->depth_stencil_saved = ctx->depth_stencil;
}

void cso_restore_depth_stencil_alpha(struct cso_context *ctx)
{
   if (ctx->depth_stencil != ctx->depth_stencil_saved) {
      ctx->depth_stencil = ctx->depth_stencil_saved;
      ctx->pipe->bind_depth_stencil_alpha_state(ctx->pipe, ctx->depth_stencil_saved);
   }
   ctx->depth_stencil_saved = NULL;
}



enum pipe_error cso_set_rasterizer(struct cso_context *ctx,
                                   const struct pipe_rasterizer_state *templ)
{
   unsigned hash_key = cso_construct_key((void*)templ,
                                         sizeof(struct pipe_rasterizer_state));
   struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                       hash_key, CSO_RASTERIZER,
                                                       (void*)templ);
   void *handle = NULL;

   if (cso_hash_iter_is_null(iter)) {
      struct cso_rasterizer *cso = MALLOC(sizeof(struct cso_rasterizer));
      if (!cso)
         return PIPE_ERROR_OUT_OF_MEMORY;

      memcpy(&cso->state, templ, sizeof(*templ));
      cso->data = ctx->pipe->create_rasterizer_state(ctx->pipe, &cso->state);
      cso->delete_state = (cso_state_callback)ctx->pipe->delete_rasterizer_state;
      cso->context = ctx->pipe;

      iter = cso_insert_state(ctx->cache, hash_key, CSO_RASTERIZER, cso);
      if (cso_hash_iter_is_null(iter)) {
         FREE(cso);
         return PIPE_ERROR_OUT_OF_MEMORY;
      }

      handle = cso->data;
   }
   else {
      handle = ((struct cso_rasterizer *)cso_hash_iter_data(iter))->data;
   }

   if (ctx->rasterizer != handle) {
      ctx->rasterizer = handle;
      ctx->pipe->bind_rasterizer_state(ctx->pipe, handle);
   }
   return PIPE_OK;
}

void cso_save_rasterizer(struct cso_context *ctx)
{
   assert(!ctx->rasterizer_saved);
   ctx->rasterizer_saved = ctx->rasterizer;
}

void cso_restore_rasterizer(struct cso_context *ctx)
{
   if (ctx->rasterizer != ctx->rasterizer_saved) {
      ctx->rasterizer = ctx->rasterizer_saved;
      ctx->pipe->bind_rasterizer_state(ctx->pipe, ctx->rasterizer_saved);
   }
   ctx->rasterizer_saved = NULL;
}



enum pipe_error cso_set_fragment_shader_handle(struct cso_context *ctx,
                                               void *handle )
{
   if (ctx->fragment_shader != handle) {
      ctx->fragment_shader = handle;
      ctx->pipe->bind_fs_state(ctx->pipe, handle);
   }
   return PIPE_OK;
}

void cso_delete_fragment_shader(struct cso_context *ctx, void *handle )
{
   if (handle == ctx->fragment_shader) {
      /* unbind before deleting */
      ctx->pipe->bind_fs_state(ctx->pipe, NULL);
      ctx->fragment_shader = NULL;
   }
   ctx->pipe->delete_fs_state(ctx->pipe, handle);
}

/* Not really working:
 */
#if 0
enum pipe_error cso_set_fragment_shader(struct cso_context *ctx,
                                        const struct pipe_shader_state *templ)
{
   const struct tgsi_token *tokens = templ->tokens;
   unsigned num_tokens = tgsi_num_tokens(tokens);
   size_t tokens_size = num_tokens*sizeof(struct tgsi_token);
   unsigned hash_key = cso_construct_key((void*)tokens, tokens_size);
   struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                       hash_key, 
                                                       CSO_FRAGMENT_SHADER,
                                                       (void*)tokens);
   void *handle = NULL;

   if (cso_hash_iter_is_null(iter)) {
      struct cso_fragment_shader *cso = MALLOC(sizeof(struct cso_fragment_shader) + tokens_size);
      struct tgsi_token *cso_tokens = (struct tgsi_token *)((char *)cso + sizeof(*cso));

      if (!cso)
         return PIPE_ERROR_OUT_OF_MEMORY;

      memcpy(cso_tokens, tokens, tokens_size);
      cso->state.tokens = cso_tokens;
      cso->data = ctx->pipe->create_fs_state(ctx->pipe, &cso->state);
      cso->delete_state = (cso_state_callback)ctx->pipe->delete_fs_state;
      cso->context = ctx->pipe;

      iter = cso_insert_state(ctx->cache, hash_key, CSO_FRAGMENT_SHADER, cso);
      if (cso_hash_iter_is_null(iter)) {
         FREE(cso);
         return PIPE_ERROR_OUT_OF_MEMORY;
      }

      handle = cso->data;
   }
   else {
      handle = ((struct cso_fragment_shader *)cso_hash_iter_data(iter))->data;
   }

   return cso_set_fragment_shader_handle( ctx, handle );
}
#endif

void cso_save_fragment_shader(struct cso_context *ctx)
{
   assert(!ctx->fragment_shader_saved);
   ctx->fragment_shader_saved = ctx->fragment_shader;
}

void cso_restore_fragment_shader(struct cso_context *ctx)
{
   if (ctx->fragment_shader_saved != ctx->fragment_shader) {
      ctx->pipe->bind_fs_state(ctx->pipe, ctx->fragment_shader_saved);
      ctx->fragment_shader = ctx->fragment_shader_saved;
   }
   ctx->fragment_shader_saved = NULL;
}


enum pipe_error cso_set_vertex_shader_handle(struct cso_context *ctx,
                                             void *handle )
{
   if (ctx->vertex_shader != handle) {
      ctx->vertex_shader = handle;
      ctx->pipe->bind_vs_state(ctx->pipe, handle);
   }
   return PIPE_OK;
}

void cso_delete_vertex_shader(struct cso_context *ctx, void *handle )
{
   if (handle == ctx->vertex_shader) {
      /* unbind before deleting */
      ctx->pipe->bind_vs_state(ctx->pipe, NULL);
      ctx->vertex_shader = NULL;
   }
   ctx->pipe->delete_vs_state(ctx->pipe, handle);
}


/* Not really working:
 */
#if 0
enum pipe_error cso_set_vertex_shader(struct cso_context *ctx,
                                      const struct pipe_shader_state *templ)
{
   unsigned hash_key = cso_construct_key((void*)templ,
                                         sizeof(struct pipe_shader_state));
   struct cso_hash_iter iter = cso_find_state_template(ctx->cache,
                                                       hash_key, CSO_VERTEX_SHADER,
                                                       (void*)templ);
   void *handle = NULL;

   if (cso_hash_iter_is_null(iter)) {
      struct cso_vertex_shader *cso = MALLOC(sizeof(struct cso_vertex_shader));

      if (!cso)
         return PIPE_ERROR_OUT_OF_MEMORY;

      memcpy(cso->state, templ, sizeof(*templ));
      cso->data = ctx->pipe->create_vs_state(ctx->pipe, &cso->state);
      cso->delete_state = (cso_state_callback)ctx->pipe->delete_vs_state;
      cso->context = ctx->pipe;

      iter = cso_insert_state(ctx->cache, hash_key, CSO_VERTEX_SHADER, cso);
      if (cso_hash_iter_is_null(iter)) {
         FREE(cso);
         return PIPE_ERROR_OUT_OF_MEMORY;
      }

      handle = cso->data;
   }
   else {
      handle = ((struct cso_vertex_shader *)cso_hash_iter_data(iter))->data;
   }

   return cso_set_vertex_shader_handle( ctx, handle );
}
#endif



void cso_save_vertex_shader(struct cso_context *ctx)
{
   assert(!ctx->vertex_shader_saved);
   ctx->vertex_shader_saved = ctx->vertex_shader;
}

void cso_restore_vertex_shader(struct cso_context *ctx)
{
   if (ctx->vertex_shader_saved != ctx->vertex_shader) {
      ctx->pipe->bind_vs_state(ctx->pipe, ctx->vertex_shader_saved);
      ctx->vertex_shader = ctx->vertex_shader_saved;
   }
   ctx->vertex_shader_saved = NULL;
}


/**
 * Copy framebuffer state from src to dst with refcounting of surfaces.
 */
static void
copy_framebuffer_state(struct pipe_framebuffer_state *dst,
                       const struct pipe_framebuffer_state *src)
{
   uint i;

   dst->width = src->width;
   dst->height = src->height;
   dst->nr_cbufs = src->nr_cbufs;
   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
      pipe_surface_reference(&dst->cbufs[i], src->cbufs[i]);
   }
   pipe_surface_reference(&dst->zsbuf, src->zsbuf);
}


static void
free_framebuffer_state(struct pipe_framebuffer_state *fb)
{
   uint i;

   for (i = 0; i < PIPE_MAX_COLOR_BUFS; i++) {
      pipe_surface_reference(&fb->cbufs[i], NULL);
   }
   pipe_surface_reference(&fb->zsbuf, NULL);
}


enum pipe_error cso_set_framebuffer(struct cso_context *ctx,
                                    const struct pipe_framebuffer_state *fb)
{
   if (memcmp(&ctx->fb, fb, sizeof(*fb)) != 0) {
      copy_framebuffer_state(&ctx->fb, fb);
      ctx->pipe->set_framebuffer_state(ctx->pipe, fb);
   }
   return PIPE_OK;
}

void cso_save_framebuffer(struct cso_context *ctx)
{
   copy_framebuffer_state(&ctx->fb_saved, &ctx->fb);
}

void cso_restore_framebuffer(struct cso_context *ctx)
{
   if (memcmp(&ctx->fb, &ctx->fb_saved, sizeof(ctx->fb))) {
      copy_framebuffer_state(&ctx->fb, &ctx->fb_saved);
      ctx->pipe->set_framebuffer_state(ctx->pipe, &ctx->fb);
      free_framebuffer_state(&ctx->fb_saved);
   }
}


enum pipe_error cso_set_viewport(struct cso_context *ctx,
                                 const struct pipe_viewport_state *vp)
{
   if (memcmp(&ctx->vp, vp, sizeof(*vp))) {
      ctx->vp = *vp;
      ctx->pipe->set_viewport_state(ctx->pipe, vp);
   }
   return PIPE_OK;
}

void cso_save_viewport(struct cso_context *ctx)
{
   ctx->vp_saved = ctx->vp;
}


void cso_restore_viewport(struct cso_context *ctx)
{
   if (memcmp(&ctx->vp, &ctx->vp_saved, sizeof(ctx->vp))) {
      ctx->vp = ctx->vp_saved;
      ctx->pipe->set_viewport_state(ctx->pipe, &ctx->vp);
   }
}




enum pipe_error cso_set_blend_color(struct cso_context *ctx,
                                    const struct pipe_blend_color *bc)
{
   if (memcmp(&ctx->blend_color, bc, sizeof(ctx->blend_color))) {
      ctx->blend_color = *bc;
      ctx->pipe->set_blend_color(ctx->pipe, bc);
   }
   return PIPE_OK;
}