summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/r300/r300_texture.c
blob: d378a7150d6bc4efd3b227059b6fc3b6e36a9132 (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
/*
 * 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_transfer.h"
#include "r300_screen.h"
#include "r300_winsys.h"

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

#include "pipe/p_screen.h"

enum r300_dim {
    DIM_WIDTH  = 0,
    DIM_HEIGHT = 1
};

unsigned r300_get_swizzle_combined(const unsigned char *swizzle_format,
                                   const unsigned char *swizzle_view)
{
    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
    };
    const uint32_t swizzle_bit[4] = {
        R300_TX_FORMAT_X,
        R300_TX_FORMAT_Y,
        R300_TX_FORMAT_Z,
        R300_TX_FORMAT_W
    };

    if (swizzle_view) {
        /* Combine two sets of swizzles. */
        for (i = 0; i < 4; i++) {
            swizzle[i] = swizzle_view[i] <= UTIL_FORMAT_SWIZZLE_W ?
                         swizzle_format[swizzle_view[i]] : swizzle_view[i];
        }
    } 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)
{
    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_X,
        R300_TX_FORMAT_SIGNED_Y,
        R300_TX_FORMAT_SIGNED_Z,
        R300_TX_FORMAT_SIGNED_W,
    };

    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:
                    return R500_TX_FORMAT_Y8X24;
                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:;
            }
    }

    result |= r300_get_swizzle_combined(desc->swizzle, swizzle_view);

    /* 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. */
        }
    }

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

    /* 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;
    }

    /* RGTC formats. */
    if (desc->layout == UTIL_FORMAT_LAYOUT_RGTC) {
        switch (format) {
            case PIPE_FORMAT_RGTC1_UNORM:
            case PIPE_FORMAT_RGTC1_SNORM:
                return R500_TX_FORMAT_ATI1N | result;
            case PIPE_FORMAT_RGTC2_UNORM:
            case PIPE_FORMAT_RGTC2_SNORM:
                return R400_TX_FORMAT_ATI2N | result;
            default:
                return ~0; /* Unsupported/unknown. */
        }
    }

    /* 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;
                }
                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. */
    }

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

            switch (desc->channel[0].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[0].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_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_I8_UNORM:
        case PIPE_FORMAT_L8_UNORM:
        case PIPE_FORMAT_R8_UNORM:
        case PIPE_FORMAT_R8_SNORM:
            return R300_COLOR_FORMAT_I8;

        /* 16-bit buffers. */
        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_B8G8R8X8_UNORM:
        case PIPE_FORMAT_A8R8G8B8_UNORM:
        case PIPE_FORMAT_X8R8G8B8_UNORM:
        case PIPE_FORMAT_A8B8G8R8_UNORM:
        case PIPE_FORMAT_R8G8B8A8_SNORM:
        case PIPE_FORMAT_X8B8G8R8_UNORM:
        case PIPE_FORMAT_R8G8B8X8_UNORM:
        case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
            return R300_COLOR_FORMAT_ARGB8888;

        case PIPE_FORMAT_R10G10B10A2_UNORM:
        case PIPE_FORMAT_R10G10B10X2_SNORM:
        case PIPE_FORMAT_B10G10R10A2_UNORM:
        case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
            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:
            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;
    static const uint32_t sign_bit[4] = {
        R300_OUT_SIGN(0x1),
        R300_OUT_SIGN(0x2),
        R300_OUT_SIGN(0x4),
        R300_OUT_SIGN(0x8),
    };

    desc = util_format_description(format);

    /* Specifies how the shader output is written to the fog unit. */
    if (desc->channel[0].type == UTIL_FORMAT_TYPE_FLOAT) {
        if (desc->channel[0].size == 32) {
            modifier |= R300_US_OUT_FMT_C4_32_FP;
        } else {
            modifier |= R300_US_OUT_FMT_C4_16_FP;
        }
    } else {
        if (desc->channel[0].size == 16) {
            modifier |= R300_US_OUT_FMT_C4_16;
        } else {
            /* C4_8 seems to be used for the formats whose pixel size
             * is <= 32 bits. */
            modifier |= R300_US_OUT_FMT_C4_8;
        }
    }

    /* Add sign. */
    for (i = 0; i < 4; i++)
        if (desc->channel[i].type == UTIL_FORMAT_TYPE_SIGNED) {
            modifier |= sign_bit[i];
        }

    /* Add swizzles and return. */
    switch (format) {
        /* 8-bit outputs.
         * COLORFORMAT_I8 stores the C2 component. */
        case PIPE_FORMAT_A8_UNORM:
            return modifier | R300_C2_SEL_A;
        case PIPE_FORMAT_I8_UNORM:
        case PIPE_FORMAT_L8_UNORM:
        case PIPE_FORMAT_R8_UNORM:
        case PIPE_FORMAT_R8_SNORM:
            return modifier | R300_C2_SEL_R;

        /* 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_B8G8R8X8_UNORM:
        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_A8R8G8B8_UNORM:
        case PIPE_FORMAT_X8R8G8B8_UNORM:
            return modifier |
                R300_C0_SEL_A | R300_C1_SEL_R |
                R300_C2_SEL_G | R300_C3_SEL_B;

        /* ABGR outputs. */
        case PIPE_FORMAT_A8B8G8R8_UNORM:
        case PIPE_FORMAT_X8B8G8R8_UNORM:
            return modifier |
                R300_C0_SEL_A | R300_C1_SEL_B |
                R300_C2_SEL_G | R300_C3_SEL_R;

        /* RGBA outputs. */
        case PIPE_FORMAT_R8G8B8X8_UNORM:
        case PIPE_FORMAT_R8G8B8A8_SNORM:
        case PIPE_FORMAT_R8SG8SB8UX8U_NORM:
        case PIPE_FORMAT_R10G10B10A2_UNORM:
        case PIPE_FORMAT_R10G10B10X2_SNORM:
        case PIPE_FORMAT_R10SG10SB10SA2U_NORM:
        case PIPE_FORMAT_R16G16B16A16_UNORM:
        case PIPE_FORMAT_R16G16B16A16_SNORM:
        case PIPE_FORMAT_R16G16B16A16_FLOAT:
        case PIPE_FORMAT_R32G32B32A32_FLOAT:
            return modifier |
                R300_C0_SEL_R | R300_C1_SEL_G |
                R300_C2_SEL_B | R300_C3_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) != ~0;
}

static void r300_texture_setup_immutable_state(struct r300_screen* screen,
                                               struct r300_texture* tex)
{
    struct r300_texture_format_state* f = &tex->tx_format;
    struct pipe_resource *pt = &tex->b.b;
    boolean is_r500 = screen->caps.is_r500;

    /* Set sampler state. */
    f->format0 = R300_TX_WIDTH((pt->width0 - 1) & 0x7ff) |
                 R300_TX_HEIGHT((pt->height0 - 1) & 0x7ff);

    if (tex->uses_pitch) {
        /* rectangles love this */
        f->format0 |= R300_TX_PITCH_EN;
        f->format2 = (tex->hwpitch[0] - 1) & 0x1fff;
    } else {
        /* power of two textures (3D, mipmaps, and no pitch) */
        f->format0 |= R300_TX_DEPTH(util_logbase2(pt->depth0) & 0xf);
    }

    f->format1 = 0;
    if (pt->target == PIPE_TEXTURE_CUBE) {
        f->format1 |= R300_TX_FORMAT_CUBIC_MAP;
    }
    if (pt->target == PIPE_TEXTURE_3D) {
        f->format1 |= R300_TX_FORMAT_3D;
    }

    /* large textures on r500 */
    if (is_r500)
    {
        if (pt->width0 > 2048) {
            f->format2 |= R500_TXWIDTH_BIT11;
        }
        if (pt->height0 > 2048) {
            f->format2 |= R500_TXHEIGHT_BIT11;
        }
    }

    f->tile_config = R300_TXO_MACRO_TILE(tex->macrotile) |
                     R300_TXO_MICRO_TILE(tex->microtile);
}

static void r300_texture_setup_fb_state(struct r300_screen* screen,
                                        struct r300_texture* tex)
{
    unsigned i;

    /* Set framebuffer state. */
    if (util_format_is_depth_or_stencil(tex->b.b.format)) {
        for (i = 0; i <= tex->b.b.last_level; i++) {
            tex->fb_state.pitch[i] =
                tex->hwpitch[i] |
                R300_DEPTHMACROTILE(tex->mip_macrotile[i]) |
                R300_DEPTHMICROTILE(tex->microtile);
        }
        tex->fb_state.format = r300_translate_zsformat(tex->b.b.format);
    } else {
        for (i = 0; i <= tex->b.b.last_level; i++) {
            tex->fb_state.pitch[i] =
                tex->hwpitch[i] |
                r300_translate_colorformat(tex->b.b.format) |
                R300_COLOR_TILE(tex->mip_macrotile[i]) |
                R300_COLOR_MICROTILE(tex->microtile);
        }
        tex->fb_state.format = r300_translate_out_fmt(tex->b.b.format);
    }
}

void r300_texture_reinterpret_format(struct pipe_screen *screen,
                                     struct pipe_resource *tex,
                                     enum pipe_format new_format)
{
    struct r300_screen *r300screen = r300_screen(screen);

    SCREEN_DBG(r300screen, DBG_TEX,
        "r300: texture_reinterpret_format: %s -> %s\n",
        util_format_short_name(tex->format),
        util_format_short_name(new_format));

    tex->format = new_format;

    r300_texture_setup_fb_state(r300_screen(screen), r300_texture(tex));
}

unsigned r300_texture_get_offset(struct r300_texture* tex, unsigned level,
                                 unsigned zslice, unsigned face)
{
    unsigned offset = tex->offset[level];

    switch (tex->b.b.target) {
        case PIPE_TEXTURE_3D:
            assert(face == 0);
            return offset + zslice * tex->layer_size[level];

        case PIPE_TEXTURE_CUBE:
            assert(zslice == 0);
            return offset + face * tex->layer_size[level];

        default:
            assert(zslice == 0 && face == 0);
            return offset;
    }
}

/* Returns the number of pixels that the texture should be aligned to
 * in the given dimension. */
static unsigned r300_get_pixel_alignment(struct r300_texture *tex,
                                         enum r300_buffer_tiling macrotile,
                                         enum r300_dim dim)
{
    static const unsigned table[2][5][3][2] =
    {
        {
    /* Macro: linear    linear    linear
       Micro: linear    tiled  square-tiled */
            {{ 32, 1}, { 8,  4}, { 0,  0}}, /*   8 bits per pixel */
            {{ 16, 1}, { 8,  2}, { 4,  4}}, /*  16 bits per pixel */
            {{  8, 1}, { 4,  2}, { 0,  0}}, /*  32 bits per pixel */
            {{  4, 1}, { 0,  0}, { 2,  2}}, /*  64 bits per pixel */
            {{  2, 1}, { 0,  0}, { 0,  0}}  /* 128 bits per pixel */
        },
        {
    /* Macro: tiled     tiled     tiled
       Micro: linear    tiled  square-tiled */
            {{256, 8}, {64, 32}, { 0,  0}}, /*   8 bits per pixel */
            {{128, 8}, {64, 16}, {32, 32}}, /*  16 bits per pixel */
            {{ 64, 8}, {32, 16}, { 0,  0}}, /*  32 bits per pixel */
            {{ 32, 8}, { 0,  0}, {16, 16}}, /*  64 bits per pixel */
            {{ 16, 8}, { 0,  0}, { 0,  0}}  /* 128 bits per pixel */
        }
    };
    static const unsigned aa_block[2] = {4, 8};
    unsigned res = 0;
    unsigned pixsize = util_format_get_blocksize(tex->b.b.format);

    assert(macrotile <= R300_BUFFER_TILED);
    assert(tex->microtile <= R300_BUFFER_SQUARETILED);
    assert(pixsize <= 16);
    assert(dim <= DIM_HEIGHT);

    if (tex->b.b.nr_samples > 1) {
        /* Multisampled textures have their own alignment scheme. */
        if (pixsize == 4)
            res = aa_block[dim];
    } else {
        /* Standard alignment. */
        res = table[macrotile][util_logbase2(pixsize)][tex->microtile][dim];
    }

    assert(res);
    return res;
}

/* Return true if macrotiling should be enabled on the miplevel. */
static boolean r300_texture_macro_switch(struct r300_texture *tex,
                                         unsigned level,
                                         boolean rv350_mode,
                                         enum r300_dim dim)
{
    unsigned tile, texdim;

    tile = r300_get_pixel_alignment(tex, R300_BUFFER_TILED, dim);
    if (dim == DIM_WIDTH) {
        texdim = u_minify(tex->b.b.width0, level);
    } else {
        texdim = u_minify(tex->b.b.height0, level);
    }

    /* See TX_FILTER1_n.MACRO_SWITCH. */
    if (rv350_mode) {
        return texdim >= tile;
    } else {
        return texdim > tile;
    }
}

/**
 * Return the stride, in bytes, of the texture images of the given texture
 * at the given level.
 */
unsigned r300_texture_get_stride(struct r300_screen* screen,
                                 struct r300_texture* tex, unsigned level)
{
    unsigned tile_width, width, stride;

    if (tex->stride_override)
        return tex->stride_override;

    /* Check the level. */
    if (level > tex->b.b.last_level) {
        SCREEN_DBG(screen, DBG_TEX, "%s: level (%u) > last_level (%u)\n",
                   __FUNCTION__, level, tex->b.b.last_level);
        return 0;
    }

    width = u_minify(tex->b.b.width0, level);

    if (util_format_is_plain(tex->b.b.format)) {
        tile_width = r300_get_pixel_alignment(tex, tex->mip_macrotile[level],
                                              DIM_WIDTH);
        width = align(width, tile_width);

        stride = util_format_get_stride(tex->b.b.format, width);

        /* Some IGPs need a minimum stride of 64 bytes, hmm...
         * This doesn't seem to apply to tiled textures, according to r300c. */
        if (!tex->microtile && !tex->mip_macrotile[level] &&
            (screen->caps.family == CHIP_FAMILY_RS600 ||
             screen->caps.family == CHIP_FAMILY_RS690 ||
             screen->caps.family == CHIP_FAMILY_RS740)) {
            return stride < 64 ? 64 : stride;
        }

        /* The alignment to 32 bytes is sort of implied by the layout... */
        return stride;
    } else {
        return align(util_format_get_stride(tex->b.b.format, width), 32);
    }
}

static unsigned r300_texture_get_nblocksy(struct r300_texture* tex,
                                          unsigned level)
{
    unsigned height, tile_height;

    height = u_minify(tex->b.b.height0, level);

    if (util_format_is_plain(tex->b.b.format)) {
        tile_height = r300_get_pixel_alignment(tex, tex->mip_macrotile[level],
                                               DIM_HEIGHT);
        height = align(height, tile_height);

        /* This is needed for the kernel checker, unfortunately. */
        height = util_next_power_of_two(height);
    }

    return util_format_get_nblocksy(tex->b.b.format, height);
}

static void r300_texture_3d_fix_mipmapping(struct r300_screen *screen,
                                           struct r300_texture *tex)
{
    /* The kernels <= 2.6.34-rc4 compute the size of mipmapped 3D textures
     * incorrectly. This is a workaround to prevent CS from being rejected. */

    unsigned i, size;

    if (!screen->rws->get_value(screen->rws, R300_VID_DRM_2_3_0) &&
        tex->b.b.target == PIPE_TEXTURE_3D &&
        tex->b.b.last_level > 0) {
        size = 0;

        for (i = 0; i <= tex->b.b.last_level; i++) {
            size += r300_texture_get_stride(screen, tex, i) *
                    r300_texture_get_nblocksy(tex, i);
        }

        size *= tex->b.b.depth0;
        tex->size = size;
    }
}

static void r300_setup_miptree(struct r300_screen* screen,
                               struct r300_texture* tex)
{
    struct pipe_resource* base = &tex->b.b;
    unsigned stride, size, layer_size, nblocksy, i;
    boolean rv350_mode = screen->caps.is_rv350;

    SCREEN_DBG(screen, DBG_TEXALLOC,
        "r300: Making miptree for texture, format %s\n",
        util_format_short_name(base->format));

    for (i = 0; i <= base->last_level; i++) {
        /* Let's see if this miplevel can be macrotiled. */
        tex->mip_macrotile[i] =
            (tex->macrotile == R300_BUFFER_TILED &&
             r300_texture_macro_switch(tex, i, rv350_mode, DIM_WIDTH) &&
             r300_texture_macro_switch(tex, i, rv350_mode, DIM_HEIGHT)) ?
             R300_BUFFER_TILED : R300_BUFFER_LINEAR;

        stride = r300_texture_get_stride(screen, tex, i);
        nblocksy = r300_texture_get_nblocksy(tex, i);
        layer_size = stride * nblocksy;

        if (base->nr_samples) {
            layer_size *= base->nr_samples;
        }

        if (base->target == PIPE_TEXTURE_CUBE)
            size = layer_size * 6;
        else
            size = layer_size * u_minify(base->depth0, i);

        tex->offset[i] = tex->size;
        tex->size = tex->offset[i] + size;
        tex->layer_size[i] = layer_size;
        tex->pitch[i] = stride / util_format_get_blocksize(base->format);
        tex->hwpitch[i] =
                tex->pitch[i] * util_format_get_blockwidth(base->format);

        SCREEN_DBG(screen, DBG_TEXALLOC, "r300: Texture miptree: Level %d "
                "(%dx%dx%d px, pitch %d bytes) %d bytes total, macrotiled %s\n",
                i, u_minify(base->width0, i), u_minify(base->height0, i),
                u_minify(base->depth0, i), stride, tex->size,
                tex->mip_macrotile[i] ? "TRUE" : "FALSE");
    }
}

static void r300_setup_flags(struct r300_texture* tex)
{
    tex->uses_pitch = !util_is_power_of_two(tex->b.b.width0) ||
                      !util_is_power_of_two(tex->b.b.height0) ||
                      tex->stride_override;
}

static void r300_setup_tiling(struct pipe_screen *screen,
                              struct r300_texture *tex)
{
    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)screen->winsys;
    enum pipe_format format = tex->b.b.format;
    boolean rv350_mode = r300_screen(screen)->caps.is_rv350;
    boolean is_zb = util_format_is_depth_or_stencil(format);
    boolean dbg_no_tiling = SCREEN_DBG_ON(r300_screen(screen), DBG_NO_TILING);

    if (!util_format_is_plain(format)) {
        return;
    }

    /* If height == 1, disable microtiling except for zbuffer. */
    if (!is_zb && (tex->b.b.height0 == 1 || dbg_no_tiling)) {
        return;
    }

    /* Set microtiling. */
    switch (util_format_get_blocksize(format)) {
        case 1:
        case 4:
            tex->microtile = R300_BUFFER_TILED;
            break;

        case 2:
        case 8:
            if (rws->get_value(rws, R300_VID_SQUARE_TILING_SUPPORT)) {
                tex->microtile = R300_BUFFER_SQUARETILED;
            }
            break;
    }

    if (dbg_no_tiling) {
        return;
    }

    /* Set macrotiling. */
    if (r300_texture_macro_switch(tex, 0, rv350_mode, DIM_WIDTH) &&
        r300_texture_macro_switch(tex, 0, rv350_mode, DIM_HEIGHT)) {
        tex->macrotile = R300_BUFFER_TILED;
    }
}

static unsigned r300_texture_is_referenced(struct pipe_context *context,
					 struct pipe_resource *texture,
					 unsigned face, unsigned level)
{
    struct r300_context *r300 = r300_context(context);
    struct r300_texture *rtex = (struct r300_texture *)texture;

    if (r300->rws->is_buffer_referenced(r300->rws, rtex->buffer, R300_REF_CS))
        return PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE;

    return PIPE_UNREFERENCED;
}

static void r300_texture_destroy(struct pipe_screen *screen,
				 struct pipe_resource* texture)
{
    struct r300_texture* tex = (struct r300_texture*)texture;
    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)texture->screen->winsys;

    rws->buffer_reference(rws, &tex->buffer, NULL);
    FREE(tex);
}

static boolean r300_texture_get_handle(struct pipe_screen* screen,
                                       struct pipe_resource *texture,
                                       struct winsys_handle *whandle)
{
    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)screen->winsys;
    struct r300_texture* tex = (struct r300_texture*)texture;

    if (!tex) {
        return FALSE;
    }

    return rws->buffer_get_handle(rws, tex->buffer, whandle,
                    r300_texture_get_stride(r300_screen(screen), tex, 0));
}

struct u_resource_vtbl r300_texture_vtbl = 
{
   r300_texture_get_handle,	      /* get_handle */
   r300_texture_destroy,	      /* resource_destroy */
   r300_texture_is_referenced,	      /* is_resource_referenced */
   r300_texture_get_transfer,	      /* get_transfer */
   r300_texture_transfer_destroy,     /* transfer_destroy */
   r300_texture_transfer_map,	      /* transfer_map */
   u_default_transfer_flush_region,   /* transfer_flush_region */
   r300_texture_transfer_unmap,	      /* transfer_unmap */
   u_default_transfer_inline_write    /* transfer_inline_write */
};

/* Create a new texture. */
struct pipe_resource* r300_texture_create(struct pipe_screen* screen,
                                          const struct pipe_resource* base)
{
    struct r300_texture* tex = CALLOC_STRUCT(r300_texture);
    struct r300_screen* rscreen = r300_screen(screen);
    struct r300_winsys_screen *rws = (struct r300_winsys_screen *)screen->winsys;

    if (!tex) {
        return NULL;
    }

    /* Refuse to create a texture with size 0. */
    if (!base->width0 ||
        (!base->height0 && (base->target == PIPE_TEXTURE_2D ||
                            base->target == PIPE_TEXTURE_CUBE)) ||
        (!base->depth0 && base->target == PIPE_TEXTURE_3D)) {
        fprintf(stderr, "r300: texture_create: "
                "Got invalid texture dimensions: %ix%ix%i\n",
                base->width0, base->height0, base->depth0);
        FREE(tex);
        return NULL;
    }

    tex->b.b = *base;
    tex->b.vtbl = &r300_texture_vtbl;
    pipe_reference_init(&tex->b.b.reference, 1);
    tex->b.b.screen = screen;

    r300_setup_flags(tex);
    if (!(base->flags & R300_RESOURCE_FLAG_TRANSFER) &&
        !(base->bind & PIPE_BIND_SCANOUT)) {
        r300_setup_tiling(screen, tex);
    }
    r300_setup_miptree(rscreen, tex);
    r300_texture_3d_fix_mipmapping(rscreen, tex);
    r300_texture_setup_immutable_state(rscreen, tex);
    r300_texture_setup_fb_state(rscreen, tex);

    SCREEN_DBG(rscreen, DBG_TEX,
               "r300: texture_create: Macro: %s, Micro: %s, Pitch: %i, "
               "Dim: %ix%ix%i, LastLevel: %i, Size: %i, Format: %s\n",
               tex->macrotile ? "YES" : " NO",
               tex->microtile ? "YES" : " NO",
               tex->hwpitch[0],
               base->width0, base->height0, base->depth0, base->last_level,
               tex->size,
               util_format_short_name(base->format));

    tex->domain = base->flags & R300_RESOURCE_FLAG_TRANSFER ?
                  R300_DOMAIN_GTT :
                  R300_DOMAIN_VRAM | R300_DOMAIN_GTT;

    tex->buffer = rws->buffer_create(rws, 2048, base->bind, tex->domain,
                                     tex->size);

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

    rws->buffer_set_tiling(rws, tex->buffer,
            tex->pitch[0] * util_format_get_blocksize(tex->b.b.format),
            tex->microtile,
            tex->macrotile);

    return (struct pipe_resource*)tex;
}

/* Not required to implement u_resource_vtbl, consider moving to another file:
 */
struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
					  struct pipe_resource* texture,
					  unsigned face,
					  unsigned level,
					  unsigned zslice,
					  unsigned flags)
{
    struct r300_texture* tex = r300_texture(texture);
    struct r300_surface* surface = CALLOC_STRUCT(r300_surface);

    if (surface) {
        pipe_reference_init(&surface->base.reference, 1);
        pipe_resource_reference(&surface->base.texture, texture);
        surface->base.format = texture->format;
        surface->base.width = u_minify(texture->width0, level);
        surface->base.height = u_minify(texture->height0, level);
        surface->base.usage = flags;
        surface->base.zslice = zslice;
        surface->base.face = face;
        surface->base.level = level;

        surface->buffer = tex->buffer;

        /* Prefer VRAM if there are multiple domains to choose from. */
        surface->domain = tex->domain;
        if (surface->domain & R300_DOMAIN_VRAM)
            surface->domain &= ~R300_DOMAIN_GTT;

        surface->offset = r300_texture_get_offset(tex, level, zslice, face);
        surface->pitch = tex->fb_state.pitch[level];
        surface->format = tex->fb_state.format;
    }

    return &surface->base;
}

/* Not required to implement u_resource_vtbl, consider moving to another file:
 */
void r300_tex_surface_destroy(struct pipe_surface* s)
{
    pipe_resource_reference(&s->texture, NULL);
    FREE(s);
}

struct pipe_resource*
r300_texture_from_handle(struct pipe_screen* screen,
			  const struct pipe_resource* base,
			  struct winsys_handle *whandle)
{
    struct r300_winsys_screen *rws = (struct r300_winsys_screen*)screen->winsys;
    struct r300_screen* rscreen = r300_screen(screen);
    struct r300_winsys_buffer *buffer;
    struct r300_texture* tex;
    unsigned stride;
    boolean override_zb_flags;

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

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

    tex = CALLOC_STRUCT(r300_texture);
    if (!tex) {
        return NULL;
    }

    tex->b.b = *base;
    tex->b.vtbl = &r300_texture_vtbl;
    pipe_reference_init(&tex->b.b.reference, 1);
    tex->b.b.screen = screen;
    tex->domain = R300_DOMAIN_VRAM;

    tex->stride_override = stride;

    /* one ref already taken */
    tex->buffer = buffer;

    rws->buffer_get_tiling(rws, buffer, &tex->microtile, &tex->macrotile);
    r300_setup_flags(tex);
    SCREEN_DBG(rscreen, DBG_TEX,
               "r300: texture_from_handle: Macro: %s, Micro: %s, "
               "Pitch: % 4i, Dim: %ix%i, Format: %s\n",
               tex->macrotile ? "YES" : " NO",
               tex->microtile ? "YES" : " NO",
               stride / util_format_get_blocksize(base->format),
               base->width0, base->height0,
               util_format_short_name(base->format));

    /* Enforce microtiled zbuffer. */
    override_zb_flags = util_format_is_depth_or_stencil(base->format) &&
                        tex->microtile == R300_BUFFER_LINEAR;

    if (override_zb_flags) {
        switch (util_format_get_blocksize(base->format)) {
            case 4:
                tex->microtile = R300_BUFFER_TILED;
                break;

            case 2:
                if (rws->get_value(rws, R300_VID_SQUARE_TILING_SUPPORT)) {
                    tex->microtile = R300_BUFFER_SQUARETILED;
                    break;
                }
                /* Pass through. */

            default:
                override_zb_flags = FALSE;
        }
    }

    r300_setup_miptree(rscreen, tex);
    r300_texture_setup_immutable_state(rscreen, tex);
    r300_texture_setup_fb_state(rscreen, tex);

    if (override_zb_flags) {
        rws->buffer_set_tiling(rws, tex->buffer,
                tex->pitch[0] * util_format_get_blocksize(tex->b.b.format),
                tex->microtile,
                tex->macrotile);
    }
    return (struct pipe_resource*)tex;
}