aboutsummaryrefslogtreecommitdiffstats
path: root/src/gallium/drivers/r300/r300_texture.c
blob: fc84004fb9735c87503ebd4e756e40a78d998a2b (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
/*
 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
 * Copyright 2010 Marek Olšák <maraeo@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE. */

/* Always include headers in the reverse order!! ~ M. */
#include "r300_texture.h"

#include "r300_context.h"
#include "r300_reg.h"
#include "r300_texture_desc.h"
#include "r300_transfer.h"
#include "r300_screen.h"

#include "util/u_format.h"
#include "util/u_format_s3tc.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_mm.h"

#include "pipe/p_screen.h"

unsigned r300_get_swizzle_combined(const unsigned char *swizzle_format,
                                   const unsigned char *swizzle_view,
                                   boolean dxtc_swizzle)
{
    unsigned i;
    unsigned char swizzle[4];
    unsigned result = 0;
    const uint32_t swizzle_shift[4] = {
        R300_TX_FORMAT_R_SHIFT,
        R300_TX_FORMAT_G_SHIFT,
        R300_TX_FORMAT_B_SHIFT,
        R300_TX_FORMAT_A_SHIFT
    };
    uint32_t swizzle_bit[4] = {
        dxtc_swizzle ? R300_TX_FORMAT_Z : R300_TX_FORMAT_X,
        R300_TX_FORMAT_Y,
        dxtc_swizzle ? R300_TX_FORMAT_X : R300_TX_FORMAT_Z,
        R300_TX_FORMAT_W
    };

    if (swizzle_view) {
        /* Combine two sets of swizzles. */
        util_format_compose_swizzles(swizzle_format, swizzle_view, swizzle);
    } else {
        memcpy(swizzle, swizzle_format, 4);
    }

    /* Get swizzle. */
    for (i = 0; i < 4; i++) {
        switch (swizzle[i]) {
            case UTIL_FORMAT_SWIZZLE_Y:
                result |= swizzle_bit[1] << swizzle_shift[i];
                break;
            case UTIL_FORMAT_SWIZZLE_Z:
                result |= swizzle_bit[2] << swizzle_shift[i];
                break;
            case UTIL_FORMAT_SWIZZLE_W:
                result |= swizzle_bit[3] << swizzle_shift[i];
                break;
            case UTIL_FORMAT_SWIZZLE_0:
                result |= R300_TX_FORMAT_ZERO << swizzle_shift[i];
                break;
            case UTIL_FORMAT_SWIZZLE_1:
                result |= R300_TX_FORMAT_ONE << swizzle_shift[i];
                break;
            default: /* UTIL_FORMAT_SWIZZLE_X */
                result |= swizzle_bit[0] << swizzle_shift[i];
        }
    }
    return result;
}

/* Translate a pipe_format into a useful texture format for sampling.
 *
 * Some special formats are translated directly using R300_EASY_TX_FORMAT,
 * but the majority of them is translated in a generic way, automatically
 * supporting all the formats hw can support.
 *
 * R300_EASY_TX_FORMAT swizzles the texture.
 * Note the signature of R300_EASY_TX_FORMAT:
 *   R300_EASY_TX_FORMAT(B, G, R, A, FORMAT);
 *
 * The FORMAT specifies how the texture sampler will treat the texture, and
 * makes available X, Y, Z, W, ZERO, and ONE for swizzling. */
uint32_t r300_translate_texformat(enum pipe_format format,
                                  const unsigned char *swizzle_view,
                                  boolean is_r500,
                                  boolean dxtc_swizzle)
{
    uint32_t result = 0;
    const struct util_format_description *desc;
    unsigned i;
    boolean uniform = TRUE;
    const uint32_t sign_bit[4] = {
        R300_TX_FORMAT_SIGNED_W,
        R300_TX_FORMAT_SIGNED_Z,
        R300_TX_FORMAT_SIGNED_Y,
        R300_TX_FORMAT_SIGNED_X,
    };

    desc = util_format_description(format);

    /* Colorspace (return non-RGB formats directly). */
    switch (desc->colorspace) {
        /* Depth stencil formats.
         * Swizzles are added in r300_merge_textures_and_samplers. */
        case UTIL_FORMAT_COLORSPACE_ZS:
            switch (format) {
                case PIPE_FORMAT_Z16_UNORM:
                    return R300_TX_FORMAT_X16;
                case PIPE_FORMAT_X8Z24_UNORM:
                case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
                    if (is_r500)
                        return R500_TX_FORMAT_Y8X24;
                    else
                        return R300_TX_FORMAT_Y16X16;
                default:
                    return ~0; /* Unsupported. */
            }

        /* YUV formats. */
        case UTIL_FORMAT_COLORSPACE_YUV:
            result |= R300_TX_FORMAT_YUV_TO_RGB;

            switch (format) {
                case PIPE_FORMAT_UYVY:
                    return R300_EASY_TX_FORMAT(X, Y, Z, ONE, YVYU422) | result;
                case PIPE_FORMAT_YUYV:
                    return R300_EASY_TX_FORMAT(X, Y, Z, ONE, VYUY422) | result;
                default:
                    return ~0; /* Unsupported/unknown. */
            }

        /* Add gamma correction. */
        case UTIL_FORMAT_COLORSPACE_SRGB:
            result |= R300_TX_FORMAT_GAMMA;
            break;

        default:
            switch (format) {
                /* Same as YUV but without the YUR->RGB conversion. */
                case PIPE_FORMAT_R8G8_B8G8_UNORM:
                    return R300_EASY_TX_FORMAT(X, Y, Z, ONE, YVYU422) | result;
                case PIPE_FORMAT_G8R8_G8B8_UNORM:
                    return R300_EASY_TX_FORMAT(X, Y, Z, ONE, VYUY422) | result;
                default:;
            }
    }

    /* Add swizzling. */
    /* The RGTC1_SNORM and LATC1_SNORM swizzle is done in the shader. */
    if (format != PIPE_FORMAT_RGTC1_SNORM &&
        format != PIPE_FORMAT_LATC1_SNORM) {
        if (util_format_is_compressed(format) &&
            dxtc_swizzle &&
            format != PIPE_FORMAT_RGTC2_UNORM &&
            format != PIPE_FORMAT_RGTC2_SNORM &&
            format != PIPE_FORMAT_LATC2_UNORM &&
            format != PIPE_FORMAT_LATC2_SNORM) {
            result |= r300_get_swizzle_combined(desc->swizzle, swizzle_view,
                                                TRUE);
        } else {
            result |= r300_get_swizzle_combined(desc->swizzle, swizzle_view,
                                                FALSE);
        }
    }

    /* S3TC formats. */
    if (desc->layout == UTIL_FORMAT_LAYOUT_S3TC) {
        if (!util_format_s3tc_enabled) {
            return ~0; /* Unsupported. */
        }

        switch (format) {
            case PIPE_FORMAT_DXT1_RGB:
            case PIPE_FORMAT_DXT1_RGBA:
            case PIPE_FORMAT_DXT1_SRGB:
            case PIPE_FORMAT_DXT1_SRGBA:
                return R300_TX_FORMAT_DXT1 | result;
            case PIPE_FORMAT_DXT3_RGBA:
            case PIPE_FORMAT_DXT3_SRGBA:
                return R300_TX_FORMAT_DXT3 | result;
            case PIPE_FORMAT_DXT5_RGBA:
            case PIPE_FORMAT_DXT5_SRGBA:
                return R300_TX_FORMAT_DXT5 | result;
            default:
                return ~0; /* Unsupported/unknown. */
        }
    }

    /* RGTC formats. */
    if (desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
        switch (format) {
            case PIPE_FORMAT_RGTC1_SNORM:
            case PIPE_FORMAT_LATC1_SNORM:
            case PIPE_FORMAT_LATC1_UNORM:
            case PIPE_FORMAT_RGTC1_UNORM:
                return R500_TX_FORMAT_ATI1N | result;

            case PIPE_FORMAT_RGTC2_SNORM:
            case PIPE_FORMAT_LATC2_SNORM:
                result |= sign_bit[1] | sign_bit[0];
            case PIPE_FORMAT_RGTC2_UNORM:
            case PIPE_FORMAT_LATC2_UNORM:
                return R400_TX_FORMAT_ATI2N | result;

            default:
                return ~0; /* Unsupported/unknown. */
        }
    }

    /* This is truly a special format.
     * It stores R8G8 and B is computed using sqrt(1 - R^2 - G^2)
     * in the sampler unit. Also known as D3DFMT_CxV8U8. */
    if (format == PIPE_FORMAT_R8G8Bx_SNORM) {
        return R300_TX_FORMAT_CxV8U8 | result;
    }

    /* Add sign. */
    for (i = 0; i < desc->nr_channels; i++) {
        if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED) {
            result |= sign_bit[i];
        }
    }

    /* See whether the components are of the same size. */
    for (i = 1; i < desc->nr_channels; i++) {
        uniform = uniform && desc->channel[0].size == desc->channel[i].size;
    }

    /* Non-uniform formats. */
    if (!uniform) {
        switch (desc->nr_channels) {
            case 3:
                if (desc->channel[0].size == 5 &&
                    desc->channel[1].size == 6 &&
                    desc->channel[2].size == 5) {
                    return R300_TX_FORMAT_Z5Y6X5 | result;
                }
                if (desc->channel[0].size == 5 &&
                    desc->channel[1].size == 5 &&
                    desc->channel[2].size == 6) {
                    return R300_TX_FORMAT_Z6Y5X5 | result;
                }
                if (desc->channel[0].size == 2 &&
                    desc->channel[1].size == 3 &&
                    desc->channel[2].size == 3) {
                    return R300_TX_FORMAT_Z3Y3X2 | result;
                }
                return ~0; /* Unsupported/unknown. */

            case 4:
                if (desc->channel[0].size == 5 &&
                    desc->channel[1].size == 5 &&
                    desc->channel[2].size == 5 &&
                    desc->channel[3].size == 1) {
                    return R300_TX_FORMAT_W1Z5Y5X5 | result;
                }
                if (desc->channel[0].size == 10 &&
                    desc->channel[1].size == 10 &&
                    desc->channel[2].size == 10 &&
                    desc->channel[3].size == 2) {
                    return R300_TX_FORMAT_W2Z10Y10X10 | result;
                }
        }
        return ~0; /* Unsupported/unknown. */
    }

    /* Find the first non-VOID channel. */
    for (i = 0; i < 4; i++) {
        if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
            break;
        }
    }

    if (i == 4)
        return ~0; /* Unsupported/unknown. */

    /* And finally, uniform formats. */
    switch (desc->channel[i].type) {
        case UTIL_FORMAT_TYPE_UNSIGNED:
        case UTIL_FORMAT_TYPE_SIGNED:
            if (!desc->channel[i].normalized &&
                desc->colorspace != UTIL_FORMAT_COLORSPACE_SRGB) {
                return ~0;
            }

            switch (desc->channel[i].size) {
                case 4:
                    switch (desc->nr_channels) {
                        case 2:
                            return R300_TX_FORMAT_Y4X4 | result;
                        case 4:
                            return R300_TX_FORMAT_W4Z4Y4X4 | result;
                    }
                    return ~0;

                case 8:
                    switch (desc->nr_channels) {
                        case 1:
                            return R300_TX_FORMAT_X8 | result;
                        case 2:
                            return R300_TX_FORMAT_Y8X8 | result;
                        case 4:
                            return R300_TX_FORMAT_W8Z8Y8X8 | result;
                    }
                    return ~0;

                case 16:
                    switch (desc->nr_channels) {
                        case 1:
                            return R300_TX_FORMAT_X16 | result;
                        case 2:
                            return R300_TX_FORMAT_Y16X16 | result;
                        case 4:
                            return R300_TX_FORMAT_W16Z16Y16X16 | result;
                    }
            }
            return ~0;

        case UTIL_FORMAT_TYPE_FLOAT:
            switch (desc->channel[i].size) {
                case 16:
                    switch (desc->nr_channels) {
                        case 1:
                            return R300_TX_FORMAT_16F | result;
                        case 2:
                            return R300_TX_FORMAT_16F_16F | result;
                        case 4:
                            return R300_TX_FORMAT_16F_16F_16F_16F | result;
                    }
                    return ~0;

                case 32:
                    switch (desc->nr_channels) {
                        case 1:
                            return R300_TX_FORMAT_32F | result;
                        case 2:
                            return R300_TX_FORMAT_32F_32F | result;
                        case 4:
                            return R300_TX_FORMAT_32F_32F_32F_32F | result;
                    }
            }
    }

    return ~0; /* Unsupported/unknown. */
}

uint32_t r500_tx_format_msb_bit(enum pipe_format format)
{
    switch (format) {
        case PIPE_FORMAT_RGTC1_UNORM:
        case PIPE_FORMAT_RGTC1_SNORM:
        case PIPE_FORMAT_LATC1_UNORM:
        case PIPE_FORMAT_LATC1_SNORM:
        case PIPE_FORMAT_X8Z24_UNORM:
        case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
            return R500_TXFORMAT_MSB;
        default:
            return 0;
    }
}

/* Buffer formats. */

/* Colorbuffer formats. This is the unswizzled format of the RB3D block's
 * output. For the swizzling of the targets, check the shader's format. */
static uint32_t r300_translate_colorformat(enum pipe_format format)
{
    switch (format) {
        /* 8-bit buffers. */
        case PIPE_FORMAT_A8_UNORM:
        case PIPE_FORMAT_A8_SNORM:
        case PIPE_FORMAT_I8_UNORM:
        case PIPE_FORMAT_I8_SNORM:
        case PIPE_FORMAT_L8_UNORM:
        case PIPE_FORMAT_L8_SNORM:
        case PIPE_FORMAT_R8_UNORM:
        case PIPE_FORMAT_R8_SNORM:
            return R300_COLOR_FORMAT_I8;

        /* 16-bit buffers. */
        case PIPE_FORMAT_L8A8_UNORM:
        case PIPE_FORMAT_L8A8_SNORM:
        case PIPE_FORMAT_R8G8_UNORM:
        case PIPE_FORMAT_R8G8_SNORM:
        /* These formats work fine with UV88 if US_OUT_FMT is set correctly. */
        case PIPE_FORMAT_A16_UNORM:
        case PIPE_FORMAT_A16_SNORM:
        case PIPE_FORMAT_A16_FLOAT:
        case PIPE_FORMAT_L16_UNORM:
        case PIPE_FORMAT_L16_SNORM:
        case PIPE_FORMAT_L16_FLOAT:
        case PIPE_FORMAT_I16_UNORM:
        case PIPE_FORMAT_I16_SNORM:
        case PIPE_FORMAT_I16_FLOAT:
        case PIPE_FORMAT_R16_UNORM:
        case PIPE_FORMAT_R16_SNORM:
        case PIPE_FORMAT_R16_FLOAT:
            return R300_COLOR_FORMAT_UV88;

        case PIPE_FORMAT_B5G6R5_UNORM:
            return R300_COLOR_FORMAT_RGB565;

        case PIPE_FORMAT_B5G5R5A1_UNORM:
        case PIPE_FORMAT_B5G5R5X1_UNORM:
            return R300_COLOR_FORMAT_ARGB1555;

        case PIPE_FORMAT_B4G4R4A4_UNORM:
        case PIPE_FORMAT_B4G4R4X4_UNORM:
            return R300_COLOR_FORMAT_ARGB4444;

        /* 32-bit buffers. */
        case PIPE_FORMAT_B8G8R8A8_UNORM:
        /*case PIPE_FORMAT_B8G8R8A8_SNORM:*/
        case PIPE_FORMAT_B8G8R8X8_UNORM:
        /*case PIPE_FORMAT_B8G8R8X8_SNORM:*/
        case PIPE_FORMAT_R8G8B8A8_UNORM:
        case PIPE_FORMAT_R8G8B8A8_SNORM:
        case PIPE_FORMAT_R8G8B8X8_UNORM:
        /*case PIPE_FORMAT_R8G8B8X8_SNORM:*/
        /* These formats work fine with ARGB8888 if US_OUT_FMT is set
         * correctly. */
        case PIPE_FORMAT_R16G16_UNORM:
        case PIPE_FORMAT_R16G16_SNORM:
        case PIPE_FORMAT_R16G16_FLOAT:
        case PIPE_FORMAT_L16A16_UNORM:
        case PIPE_FORMAT_L16A16_SNORM:
        case PIPE_FORMAT_L16A16_FLOAT:
        case PIPE_FORMAT_A32_FLOAT:
        case PIPE_FORMAT_L32_FLOAT:
        case PIPE_FORMAT_I32_FLOAT:
        case PIPE_FORMAT_R32_FLOAT:
            return R300_COLOR_FORMAT_ARGB8888;

        case PIPE_FORMAT_R10G10B10A2_UNORM:
        case PIPE_FORMAT_R10G10B10X2_SNORM:
        case PIPE_FORMAT_B10G10R10A2_UNORM:
            return R500_COLOR_FORMAT_ARGB2101010;  /* R5xx-only? */

        /* 64-bit buffers. */
        case PIPE_FORMAT_R16G16B16A16_UNORM:
        case PIPE_FORMAT_R16G16B16A16_SNORM:
        case PIPE_FORMAT_R16G16B16A16_FLOAT:
        /* These formats work fine with ARGB16161616 if US_OUT_FMT is set
         * correctly. */
        case PIPE_FORMAT_R32G32_FLOAT:
        case PIPE_FORMAT_L32A32_FLOAT:
            return R300_COLOR_FORMAT_ARGB16161616;

        /* 128-bit buffers. */
        case PIPE_FORMAT_R32G32B32A32_FLOAT:
            return R300_COLOR_FORMAT_ARGB32323232;

        /* YUV buffers. */
        case PIPE_FORMAT_UYVY:
            return R300_COLOR_FORMAT_YVYU;
        case PIPE_FORMAT_YUYV:
            return R300_COLOR_FORMAT_VYUY;
        default:
            return ~0; /* Unsupported. */
    }
}

/* Depthbuffer and stencilbuffer. Thankfully, we only support two flavors. */
static uint32_t r300_translate_zsformat(enum pipe_format format)
{
    switch (format) {
        /* 16-bit depth, no stencil */
        case PIPE_FORMAT_Z16_UNORM:
            return R300_DEPTHFORMAT_16BIT_INT_Z;
        /* 24-bit depth, ignored stencil */
        case PIPE_FORMAT_X8Z24_UNORM:
        /* 24-bit depth, 8-bit stencil */
        case PIPE_FORMAT_S8_USCALED_Z24_UNORM:
            return R300_DEPTHFORMAT_24BIT_INT_Z_8BIT_STENCIL;
        default:
            return ~0; /* Unsupported. */
    }
}

/* Shader output formats. This is essentially the swizzle from the shader
 * to the RB3D block.
 *
 * Note that formats are stored from C3 to C0. */
static uint32_t r300_translate_out_fmt(enum pipe_format format)
{
    uint32_t modifier = 0;
    unsigned i;
    const struct util_format_description *desc;
    boolean uniform_sign;

    desc = util_format_description(format);

    /* Find the first non-VOID channel. */
    for (i = 0; i < 4; i++) {
        if (desc->channel[i].type != UTIL_FORMAT_TYPE_VOID) {
            break;
        }
    }

    if (i == 4)
        return ~0; /* Unsupported/unknown. */

    /* Specifies how the shader output is written to the fog unit. */
    switch (desc->channel[i].type) {
    case UTIL_FORMAT_TYPE_FLOAT:
        switch (desc->channel[i].size) {
        case 32:
            switch (desc->nr_channels) {
            case 1:
                modifier |= R300_US_OUT_FMT_C_32_FP;
                break;
            case 2:
                modifier |= R300_US_OUT_FMT_C2_32_FP;
                break;
            case 4:
                modifier |= R300_US_OUT_FMT_C4_32_FP;
                break;
            }
            break;

        case 16:
            switch (desc->nr_channels) {
            case 1:
                modifier |= R300_US_OUT_FMT_C_16_FP;
                break;
            case 2:
                modifier |= R300_US_OUT_FMT_C2_16_FP;
                break;
            case 4:
                modifier |= R300_US_OUT_FMT_C4_16_FP;
                break;
            }
            break;
        }
        break;

    default:
        switch (desc->channel[i].size) {
        case 16:
            switch (desc->nr_channels) {
            case 1:
                modifier |= R300_US_OUT_FMT_C_16;
                break;
            case 2:
                modifier |= R300_US_OUT_FMT_C2_16;
                break;
            case 4:
                modifier |= R300_US_OUT_FMT_C4_16;
                break;
            }
            break;

        case 10:
            modifier |= R300_US_OUT_FMT_C4_10;
            break;

        default:
            /* C4_8 seems to be used for the formats whose pixel size
             * is <= 32 bits. */
            modifier |= R300_US_OUT_FMT_C4_8;
            break;
        }
    }

    /* Add sign. */
    uniform_sign = TRUE;
    for (i = 0; i < desc->nr_channels; i++)
        if (desc->channel[i].type != UTIL_FORMAT_TYPE_SIGNED)
            uniform_sign = FALSE;

    if (uniform_sign)
        modifier |= R300_OUT_SIGN(0xf);

    /* Add swizzles and return. */
    switch (format) {
        /*** Special cases (non-standard channel mapping) ***/

        /* X8
         * COLORFORMAT_I8 stores the Z component (C2). */
        case PIPE_FORMAT_A8_UNORM:
        case PIPE_FORMAT_A8_SNORM:
            return modifier | R300_C2_SEL_A;
        case PIPE_FORMAT_I8_UNORM:
        case PIPE_FORMAT_I8_SNORM:
        case PIPE_FORMAT_L8_UNORM:
        case PIPE_FORMAT_L8_SNORM:
        case PIPE_FORMAT_R8_UNORM:
        case PIPE_FORMAT_R8_SNORM:
            return modifier | R300_C2_SEL_R;

        /* X8Y8
         * COLORFORMAT_UV88 stores ZX (C2 and C0). */
        case PIPE_FORMAT_L8A8_SNORM:
        case PIPE_FORMAT_L8A8_UNORM:
            return modifier | R300_C0_SEL_A | R300_C2_SEL_R;
        case PIPE_FORMAT_R8G8_SNORM:
        case PIPE_FORMAT_R8G8_UNORM:
            return modifier | R300_C0_SEL_G | R300_C2_SEL_R;

        /* X32Y32
         * ARGB16161616 stores XZ for RG32F */
        case PIPE_FORMAT_R32G32_FLOAT:
            return modifier | R300_C0_SEL_R | R300_C2_SEL_G;

        /*** Generic cases (standard channel mapping) ***/

        /* BGRA outputs. */
        case PIPE_FORMAT_B5G6R5_UNORM:
        case PIPE_FORMAT_B5G5R5A1_UNORM:
        case PIPE_FORMAT_B5G5R5X1_UNORM:
        case PIPE_FORMAT_B4G4R4A4_UNORM:
        case PIPE_FORMAT_B4G4R4X4_UNORM:
        case PIPE_FORMAT_B8G8R8A8_UNORM:
        /*case PIPE_FORMAT_B8G8R8A8_SNORM:*/
        case PIPE_FORMAT_B8G8R8X8_UNORM:
        /*case PIPE_FORMAT_B8G8R8X8_SNORM:*/
        case PIPE_FORMAT_B10G10R10A2_UNORM:
            return modifier |
                R300_C0_SEL_B | R300_C1_SEL_G |
                R300_C2_SEL_R | R300_C3_SEL_A;

        /* ARGB outputs. */
        case PIPE_FORMAT_A16_UNORM:
        case PIPE_FORMAT_A16_SNORM:
        case PIPE_FORMAT_A16_FLOAT:
        case PIPE_FORMAT_A32_FLOAT:
            return modifier |
                R300_C0_SEL_A | R300_C1_SEL_R |
                R300_C2_SEL_G | R300_C3_SEL_B;

        /* RGBA outputs. */
        case PIPE_FORMAT_R8G8B8X8_UNORM:
        /*case PIPE_FORMAT_R8G8B8X8_SNORM:*/
        case PIPE_FORMAT_R8G8B8A8_UNORM:
        case PIPE_FORMAT_R8G8B8A8_SNORM:
        case PIPE_FORMAT_R10G10B10A2_UNORM:
        case PIPE_FORMAT_R10G10B10X2_SNORM:
        case PIPE_FORMAT_R16_UNORM:
        case PIPE_FORMAT_R16G16_UNORM:
        case PIPE_FORMAT_R16G16B16A16_UNORM:
        case PIPE_FORMAT_R16_SNORM:
        case PIPE_FORMAT_R16G16_SNORM:
        case PIPE_FORMAT_R16G16B16A16_SNORM:
        case PIPE_FORMAT_R16_FLOAT:
        case PIPE_FORMAT_R16G16_FLOAT:
        case PIPE_FORMAT_R16G16B16A16_FLOAT:
        case PIPE_FORMAT_R32_FLOAT:
        case PIPE_FORMAT_R32G32B32A32_FLOAT:
        case PIPE_FORMAT_L16_UNORM:
        case PIPE_FORMAT_L16_SNORM:
        case PIPE_FORMAT_L16_FLOAT:
        case PIPE_FORMAT_L32_FLOAT:
        case PIPE_FORMAT_I16_UNORM:
        case PIPE_FORMAT_I16_SNORM:
        case PIPE_FORMAT_I16_FLOAT:
        case PIPE_FORMAT_I32_FLOAT:
            return modifier |
                R300_C0_SEL_R | R300_C1_SEL_G |
                R300_C2_SEL_B | R300_C3_SEL_A;

        /* LA outputs. */
        case PIPE_FORMAT_L16A16_UNORM:
        case PIPE_FORMAT_L16A16_SNORM:
        case PIPE_FORMAT_L16A16_FLOAT:
        case PIPE_FORMAT_L32A32_FLOAT:
            return modifier |
                R300_C0_SEL_R | R300_C1_SEL_A;

        default:
            return ~0; /* Unsupported. */
    }
}

boolean r300_is_colorbuffer_format_supported(enum pipe_format format)
{
    return r300_translate_colorformat(format) != ~0 &&
           r300_translate_out_fmt(format) != ~0;
}

boolean r300_is_zs_format_supported(enum pipe_format format)
{
    return r300_translate_zsformat(format) != ~0;
}

boolean r300_is_sampler_format_supported(enum pipe_format format)
{
    return r300_translate_texformat(format, 0, TRUE, FALSE) != ~0;
}

void r300_texture_setup_format_state(struct r300_screen *screen,
                                     struct r300_resource *tex,
                                     unsigned level,
                                     struct r300_texture_format_state *out)
{
    struct pipe_resource *pt = &tex->b.b.b;
    struct r300_texture_desc *desc = &tex->tex;
    boolean is_r500 = screen->caps.is_r500;
    unsigned width, height, depth;
    unsigned txwidth, txheight, txdepth;

    width = u_minify(desc->width0, level);
    height = u_minify(desc->height0, level);
    depth = u_minify(desc->depth0, level);

    txwidth = (width - 1) & 0x7ff;
    txheight = (height - 1) & 0x7ff;
    txdepth = util_logbase2(depth) & 0xf;

    /* Mask out all the fields we change. */
    out->format0 = 0;
    out->format1 &= ~R300_TX_FORMAT_TEX_COORD_TYPE_MASK;
    out->format2 &= R500_TXFORMAT_MSB;
    out->tile_config = 0;

    /* Set sampler state. */
    out->format0 =
        R300_TX_WIDTH(txwidth) |
        R300_TX_HEIGHT(txheight) |
        R300_TX_DEPTH(txdepth);

    if (desc->uses_stride_addressing) {
        /* rectangles love this */
        out->format0 |= R300_TX_PITCH_EN;
        out->format2 = (desc->stride_in_pixels[level] - 1) & 0x1fff;
    }

    if (pt->target == PIPE_TEXTURE_CUBE) {
        out->format1 |= R300_TX_FORMAT_CUBIC_MAP;
    }
    if (pt->target == PIPE_TEXTURE_3D) {
        out->format1 |= R300_TX_FORMAT_3D;
    }

    /* large textures on r500 */
    if (is_r500)
    {
        unsigned us_width = txwidth;
        unsigned us_height = txheight;
        unsigned us_depth = txdepth;

        if (width > 2048) {
            out->format2 |= R500_TXWIDTH_BIT11;
        }
        if (height > 2048) {
            out->format2 |= R500_TXHEIGHT_BIT11;
        }

        /* The US_FORMAT register fixes an R500 TX addressing bug.
         * Don't ask why it must be set like this. I don't know it either. */
        if (width > 2048) {
            us_width = (0x000007FF + us_width) >> 1;
            us_depth |= 0x0000000D;
        }
        if (height > 2048) {
            us_height = (0x000007FF + us_height) >> 1;
            us_depth |= 0x0000000E;
        }

        out->us_format0 =
            R300_TX_WIDTH(us_width) |
            R300_TX_HEIGHT(us_height) |
            R300_TX_DEPTH(us_depth);
    }

    out->tile_config = R300_TXO_MACRO_TILE(desc->macrotile[level]) |
                       R300_TXO_MICRO_TILE(desc->microtile);
}

static void r300_texture_setup_fb_state(struct r300_surface *surf)
{
    struct r300_resource *tex = r300_resource(surf->base.texture);
    unsigned level = surf->base.u.tex.level;

    /* Set framebuffer state. */
    if (util_format_is_depth_or_stencil(surf->base.format)) {
        surf->pitch =
                tex->tex.stride_in_pixels[level] |
                R300_DEPTHMACROTILE(tex->tex.macrotile[level]) |
                R300_DEPTHMICROTILE(tex->tex.microtile);
        surf->format = r300_translate_zsformat(surf->base.format);
        surf->pitch_zmask = tex->tex.zmask_stride_in_pixels[level];
        surf->pitch_hiz = tex->tex.hiz_stride_in_pixels[level];
    } else {
        surf->pitch =
                tex->tex.stride_in_pixels[level] |
                r300_translate_colorformat(surf->base.format) |
                R300_COLOR_TILE(tex->tex.macrotile[level]) |
                R300_COLOR_MICROTILE(tex->tex.microtile);
        surf->format = r300_translate_out_fmt(surf->base.format);
    }
}

boolean r300_resource_set_properties(struct pipe_screen *screen,
                                     struct pipe_resource *tex,
                                     unsigned offset,
                                     const struct pipe_resource *new_properties)
{
    struct r300_screen *rscreen = r300_screen(screen);
    struct r300_resource *res = r300_resource(tex);

    SCREEN_DBG(rscreen, DBG_TEX,
        "r300: texture_set_properties: %s -> %s\n",
        util_format_short_name(tex->format),
        util_format_short_name(new_properties->format));

    if (!r300_texture_desc_init(rscreen, res, new_properties)) {
        fprintf(stderr, "r300: ERROR: Cannot set texture properties.\n");
        return FALSE;
    }
    res->tex_offset = offset;
    r300_texture_setup_format_state(rscreen, res, 0, &res->tx_format);

    return TRUE;
}

static void r300_texture_destroy(struct pipe_screen *screen,
                                 struct pipe_resource* texture)
{
    struct r300_resource* tex = (struct r300_resource*)texture;

    pb_reference(&tex->buf, NULL);
    FREE(tex);
}

boolean r300_resource_get_handle(struct pipe_screen* screen,
                                 struct pipe_resource *texture,
                                 struct winsys_handle *whandle)
{
    struct radeon_winsys *rws = (struct radeon_winsys *)screen->winsys;
    struct r300_resource* tex = (struct r300_resource*)texture;

    if (!tex) {
        return FALSE;
    }

    return rws->buffer_get_handle(tex->buf,
                                  tex->tex.stride_in_bytes[0], whandle);
}

static const struct u_resource_vtbl r300_texture_vtbl =
{
    NULL,                           /* get_handle */
    r300_texture_destroy,           /* resource_destroy */
    r300_texture_get_transfer,      /* get_transfer */
    r300_texture_transfer_destroy,  /* transfer_destroy */
    r300_texture_transfer_map,      /* transfer_map */
    NULL,                           /* transfer_flush_region */
    r300_texture_transfer_unmap,    /* transfer_unmap */
    u_default_transfer_inline_write /* transfer_inline_write */
};

/* The common texture constructor. */
static struct r300_resource*
r300_texture_create_object(struct r300_screen *rscreen,
                           const struct pipe_resource *base,
                           enum radeon_bo_layout microtile,
                           enum radeon_bo_layout macrotile,
                           unsigned stride_in_bytes_override,
                           unsigned max_buffer_size,
                           struct pb_buffer *buffer)
{
    struct radeon_winsys *rws = rscreen->rws;
    struct r300_resource *tex = CALLOC_STRUCT(r300_resource);
    if (!tex) {
        if (buffer)
            pb_reference(&buffer, NULL);
        return NULL;
    }

    pipe_reference_init(&tex->b.b.b.reference, 1);
    tex->b.b.b.screen = &rscreen->screen;
    tex->b.b.b.usage = base->usage;
    tex->b.b.b.bind = base->bind;
    tex->b.b.b.flags = base->flags;
    tex->b.b.vtbl = &r300_texture_vtbl;
    tex->tex.microtile = microtile;
    tex->tex.macrotile[0] = macrotile;
    tex->tex.stride_in_bytes_override = stride_in_bytes_override;
    tex->domain = base->flags & R300_RESOURCE_FLAG_TRANSFER ?
                  RADEON_DOMAIN_GTT :
                  RADEON_DOMAIN_VRAM | RADEON_DOMAIN_GTT;
    tex->buf_size = max_buffer_size;

    if (!r300_resource_set_properties(&rscreen->screen, &tex->b.b.b, 0, base)) {
        if (buffer)
            pb_reference(&buffer, NULL);
        FREE(tex);
        return NULL;
    }

    /* Create the backing buffer if needed. */
    if (!buffer) {
        tex->buf_size = tex->tex.size_in_bytes;
        tex->buf = rws->buffer_create(rws, tex->tex.size_in_bytes, 2048,
                                      base->bind, tex->domain);

        if (!tex->buf) {
            FREE(tex);
            return NULL;
        }
    } else {
        tex->buf = buffer;
    }

    tex->cs_buf = rws->buffer_get_cs_handle(tex->buf);

    rws->buffer_set_tiling(tex->buf, NULL,
            tex->tex.microtile, tex->tex.macrotile[0],
            tex->tex.stride_in_bytes[0]);

    return tex;
}

/* Create a new texture. */
struct pipe_resource *r300_texture_create(struct pipe_screen *screen,
                                          const struct pipe_resource *base)
{
    struct r300_screen *rscreen = r300_screen(screen);
    enum radeon_bo_layout microtile, macrotile;

    if ((base->flags & R300_RESOURCE_FLAG_TRANSFER) ||
        (base->bind & PIPE_BIND_SCANOUT)) {
        microtile = RADEON_LAYOUT_LINEAR;
        macrotile = RADEON_LAYOUT_LINEAR;
    } else {
        /* This will make the texture_create_function select the layout. */
        microtile = RADEON_LAYOUT_UNKNOWN;
        macrotile = RADEON_LAYOUT_UNKNOWN;
    }

    return (struct pipe_resource*)
           r300_texture_create_object(rscreen, base, microtile, macrotile,
                                      0, 0, NULL);
}

struct pipe_resource *r300_texture_from_handle(struct pipe_screen *screen,
                                               const struct pipe_resource *base,
                                               struct winsys_handle *whandle)
{
    struct radeon_winsys *rws = (struct radeon_winsys*)screen->winsys;
    struct r300_screen *rscreen = r300_screen(screen);
    struct pb_buffer *buffer;
    enum radeon_bo_layout microtile, macrotile;
    unsigned stride, size;

    /* Support only 2D textures without mipmaps */
    if ((base->target != PIPE_TEXTURE_2D &&
          base->target != PIPE_TEXTURE_RECT) ||
        base->depth0 != 1 ||
        base->last_level != 0) {
        return NULL;
    }

    buffer = rws->buffer_from_handle(rws, whandle, &stride, &size);
    if (!buffer)
        return NULL;

    rws->buffer_get_tiling(buffer, &microtile, &macrotile);

    /* Enforce a microtiled zbuffer. */
    if (util_format_is_depth_or_stencil(base->format) &&
        microtile == RADEON_LAYOUT_LINEAR) {
        switch (util_format_get_blocksize(base->format)) {
            case 4:
                microtile = RADEON_LAYOUT_TILED;
                break;

            case 2:
                microtile = RADEON_LAYOUT_SQUARETILED;
                break;
        }
    }

    return (struct pipe_resource*)
           r300_texture_create_object(rscreen, base, microtile, macrotile,
                                      stride, size, buffer);
}

/* Not required to implement u_resource_vtbl, consider moving to another file:
 */
struct pipe_surface* r300_create_surface(struct pipe_context * ctx,
                                         struct pipe_resource* texture,
                                         const struct pipe_surface *surf_tmpl)
{
    struct r300_resource* tex = r300_resource(texture);
    struct r300_surface* surface = CALLOC_STRUCT(r300_surface);
    unsigned level = surf_tmpl->u.tex.level;

    assert(surf_tmpl->u.tex.first_layer == surf_tmpl->u.tex.last_layer);

    if (surface) {
        uint32_t offset, tile_height;

        pipe_reference_init(&surface->base.reference, 1);
        pipe_resource_reference(&surface->base.texture, texture);
        surface->base.context = ctx;
        surface->base.format = surf_tmpl->format;
        surface->base.width = u_minify(texture->width0, level);
        surface->base.height = u_minify(texture->height0, level);
        surface->base.usage = surf_tmpl->usage;
        surface->base.u.tex.level = level;
        surface->base.u.tex.first_layer = surf_tmpl->u.tex.first_layer;
        surface->base.u.tex.last_layer = surf_tmpl->u.tex.last_layer;

        surface->buf = tex->buf;
        surface->cs_buf = tex->cs_buf;

        /* Prefer VRAM if there are multiple domains to choose from. */
        surface->domain = tex->domain;
        if (surface->domain & RADEON_DOMAIN_VRAM)
            surface->domain &= ~RADEON_DOMAIN_GTT;

        surface->offset = r300_texture_get_offset(tex, level,
                                                  surf_tmpl->u.tex.first_layer);
        r300_texture_setup_fb_state(surface);

        /* Parameters for the CBZB clear. */
        surface->cbzb_allowed = tex->tex.cbzb_allowed[level];
        surface->cbzb_width = align(surface->base.width, 64);

        /* Height must be aligned to the size of a tile. */
        tile_height = r300_get_pixel_alignment(tex->b.b.b.format,
                                               tex->b.b.b.nr_samples,
                                               tex->tex.microtile,
                                               tex->tex.macrotile[level],
                                               DIM_HEIGHT, 0);

        surface->cbzb_height = align((surface->base.height + 1) / 2,
                                     tile_height);

        /* Offset must be aligned to 2K and must point at the beginning
         * of a scanline. */
        offset = surface->offset +
                 tex->tex.stride_in_bytes[level] * surface->cbzb_height;
        surface->cbzb_midpoint_offset = offset & ~2047;

        surface->cbzb_pitch = surface->pitch & 0x1ffffc;

        if (util_format_get_blocksizebits(surface->base.format) == 32)
            surface->cbzb_format = R300_DEPTHFORMAT_24BIT_INT_Z_8BIT_STENCIL;
        else
            surface->cbzb_format = R300_DEPTHFORMAT_16BIT_INT_Z;

        DBG(r300_context(ctx), DBG_CBZB,
            "CBZB Allowed: %s, Dim: %ix%i, Misalignment: %i, Micro: %s, Macro: %s\n",
            surface->cbzb_allowed ? "YES" : " NO",
            surface->cbzb_width, surface->cbzb_height,
            offset & 2047,
            tex->tex.microtile ? "YES" : " NO",
            tex->tex.macrotile[level] ? "YES" : " NO");
    }

    return &surface->base;
}

/* Not required to implement u_resource_vtbl, consider moving to another file:
 */
void r300_surface_destroy(struct pipe_context *ctx, struct pipe_surface* s)
{
    pipe_resource_reference(&s->texture, NULL);
    FREE(s);
}