-
Notifications
You must be signed in to change notification settings - Fork 54
/
Swizzle.cpp
1140 lines (984 loc) · 46.4 KB
/
Swizzle.cpp
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
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "Swizzle.h"
#include "Logging.h"
#include "Tools.h"
#include "mozilla/CheckedInt.h"
#include "mozilla/EndianUtils.h"
#ifdef USE_SSE2
# include "mozilla/SSE.h"
#endif
#ifdef USE_NEON
# include "mozilla/arm.h"
#endif
namespace mozilla {
namespace gfx {
/**
* Convenience macros for dispatching to various format combinations.
*/
// Hash the formats to a relatively dense value to optimize jump table
// generation. The first 6 formats in SurfaceFormat are the 32-bit BGRA variants
// and are the most common formats dispatched here. Room is reserved in the
// lowish bits for up to these 6 destination formats. If a destination format is
// >= 6, the 6th bit is set to avoid collisions.
#define FORMAT_KEY(aSrcFormat, aDstFormat) \
(int(aSrcFormat) * 6 + int(aDstFormat) + (int(int(aDstFormat) >= 6) << 6))
#define FORMAT_CASE_EXPR(aSrcFormat, aDstFormat, ...) \
case FORMAT_KEY(aSrcFormat, aDstFormat): \
__VA_ARGS__; \
return true;
#define FORMAT_CASE(aSrcFormat, aDstFormat, ...) \
FORMAT_CASE_EXPR(aSrcFormat, aDstFormat, FORMAT_CASE_CALL(__VA_ARGS__))
#define FORMAT_CASE_ROW(aSrcFormat, aDstFormat, ...) \
case FORMAT_KEY(aSrcFormat, aDstFormat): \
return &__VA_ARGS__;
/**
* Constexpr functions for analyzing format attributes in templates.
*/
// Whether B comes before R in pixel memory layout.
static constexpr bool IsBGRFormat(SurfaceFormat aFormat) {
return aFormat == SurfaceFormat::B8G8R8A8 ||
#if MOZ_LITTLE_ENDIAN()
aFormat == SurfaceFormat::R5G6B5_UINT16 ||
#endif
aFormat == SurfaceFormat::B8G8R8X8 || aFormat == SurfaceFormat::B8G8R8;
}
// Whether the order of B and R need to be swapped to map from src to dst.
static constexpr bool ShouldSwapRB(SurfaceFormat aSrcFormat,
SurfaceFormat aDstFormat) {
return IsBGRFormat(aSrcFormat) != IsBGRFormat(aDstFormat);
}
// The starting byte of the RGB components in pixel memory.
static constexpr uint32_t RGBByteIndex(SurfaceFormat aFormat) {
return aFormat == SurfaceFormat::A8R8G8B8 ||
aFormat == SurfaceFormat::X8R8G8B8
? 1
: 0;
}
// The byte of the alpha component, which just comes after RGB.
static constexpr uint32_t AlphaByteIndex(SurfaceFormat aFormat) {
return (RGBByteIndex(aFormat) + 3) % 4;
}
// The endian-dependent bit shift to access RGB of a UINT32 pixel.
static constexpr uint32_t RGBBitShift(SurfaceFormat aFormat) {
#if MOZ_LITTLE_ENDIAN()
return 8 * RGBByteIndex(aFormat);
#else
return 8 - 8 * RGBByteIndex(aFormat);
#endif
}
// The endian-dependent bit shift to access alpha of a UINT32 pixel.
static constexpr uint32_t AlphaBitShift(SurfaceFormat aFormat) {
return (RGBBitShift(aFormat) + 24) % 32;
}
// Whether the pixel format should ignore the value of the alpha channel and
// treat it as opaque.
static constexpr bool IgnoreAlpha(SurfaceFormat aFormat) {
return aFormat == SurfaceFormat::B8G8R8X8 ||
aFormat == SurfaceFormat::R8G8B8X8 ||
aFormat == SurfaceFormat::X8R8G8B8;
}
// Whether to force alpha to opaque to map from src to dst.
static constexpr bool ShouldForceOpaque(SurfaceFormat aSrcFormat,
SurfaceFormat aDstFormat) {
return IgnoreAlpha(aSrcFormat) != IgnoreAlpha(aDstFormat);
}
#ifdef USE_SSE2
/**
* SSE2 optimizations
*/
template <bool aSwapRB, bool aOpaqueAlpha>
void Premultiply_SSE2(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
# define PREMULTIPLY_SSE2(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
Premultiply_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB, bool aOpaqueAlpha>
void PremultiplyRow_SSE2(const uint8_t*, uint8_t*, int32_t);
# define PREMULTIPLY_ROW_SSE2(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW( \
aSrcFormat, aDstFormat, \
PremultiplyRow_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB>
void Unpremultiply_SSE2(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
# define UNPREMULTIPLY_SSE2(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
Unpremultiply_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat)>)
template <bool aSwapRB, bool aOpaqueAlpha>
void Swizzle_SSE2(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
# define SWIZZLE_SSE2(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
Swizzle_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB, bool aOpaqueAlpha>
void SwizzleRow_SSE2(const uint8_t*, uint8_t*, int32_t);
# define SWIZZLE_ROW_SSE2(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW( \
aSrcFormat, aDstFormat, \
SwizzleRow_SSE2<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB>
void UnpackRowRGB24_SSSE3(const uint8_t*, uint8_t*, int32_t);
# define UNPACK_ROW_RGB_SSSE3(aDstFormat) \
FORMAT_CASE_ROW( \
SurfaceFormat::R8G8B8, aDstFormat, \
UnpackRowRGB24_SSSE3<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
template <bool aSwapRB>
void UnpackRowRGB24_AVX2(const uint8_t*, uint8_t*, int32_t);
# define UNPACK_ROW_RGB_AVX2(aDstFormat) \
FORMAT_CASE_ROW( \
SurfaceFormat::R8G8B8, aDstFormat, \
UnpackRowRGB24_AVX2<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
#endif
#ifdef USE_NEON
/**
* ARM NEON optimizations
*/
template <bool aSwapRB, bool aOpaqueAlpha>
void Premultiply_NEON(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
# define PREMULTIPLY_NEON(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
Premultiply_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB, bool aOpaqueAlpha>
void PremultiplyRow_NEON(const uint8_t*, uint8_t*, int32_t);
# define PREMULTIPLY_ROW_NEON(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW( \
aSrcFormat, aDstFormat, \
PremultiplyRow_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB>
void Unpremultiply_NEON(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
# define UNPREMULTIPLY_NEON(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
Unpremultiply_NEON<ShouldSwapRB(aSrcFormat, aDstFormat)>)
template <bool aSwapRB, bool aOpaqueAlpha>
void Swizzle_NEON(const uint8_t*, int32_t, uint8_t*, int32_t, IntSize);
# define SWIZZLE_NEON(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
Swizzle_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB, bool aOpaqueAlpha>
void SwizzleRow_NEON(const uint8_t*, uint8_t*, int32_t);
# define SWIZZLE_ROW_NEON(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW( \
aSrcFormat, aDstFormat, \
SwizzleRow_NEON<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat)>)
template <bool aSwapRB>
void UnpackRowRGB24_NEON(const uint8_t*, uint8_t*, int32_t);
# define UNPACK_ROW_RGB_NEON(aDstFormat) \
FORMAT_CASE_ROW( \
SurfaceFormat::R8G8B8, aDstFormat, \
UnpackRowRGB24_NEON<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
#endif
/**
* Premultiplying
*/
// Fallback premultiply implementation that uses splayed pixel math to reduce
// the multiplications used. That is, the R and B components are isolated from
// the G and A components, which then can be multiplied as if they were two
// 2-component vectors. Otherwise, an approximation if divide-by-255 is used
// which is faster than an actual division. These optimizations are also used
// for the SSE2 and NEON implementations.
template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
static void PremultiplyChunkFallback(const uint8_t*& aSrc, uint8_t*& aDst,
int32_t aLength) {
const uint8_t* end = aSrc + 4 * aLength;
do {
// Load and process 1 entire pixel at a time.
uint32_t color = *reinterpret_cast<const uint32_t*>(aSrc);
uint32_t a = aSrcAShift ? color >> aSrcAShift : color & 0xFF;
// Isolate the R and B components.
uint32_t rb = (color >> aSrcRGBShift) & 0x00FF00FF;
// Swap the order of R and B if necessary.
if (aSwapRB) {
rb = (rb >> 16) | (rb << 16);
}
// Approximate the multiply by alpha and divide by 255 which is
// essentially:
// c = c*a + 255; c = (c + (c >> 8)) >> 8;
// However, we omit the final >> 8 to fold it with the final shift into
// place depending on desired output format.
rb = rb * a + 0x00FF00FF;
rb = (rb + ((rb >> 8) & 0x00FF00FF)) & 0xFF00FF00;
// Use same approximation as above, but G is shifted 8 bits left.
// Alpha is left out and handled separately.
uint32_t g = color & (0xFF00 << aSrcRGBShift);
g = g * a + (0xFF00 << aSrcRGBShift);
g = (g + (g >> 8)) & (0xFF0000 << aSrcRGBShift);
// The above math leaves RGB shifted left by 8 bits.
// Shift them right if required for the output format.
// then combine them back together to produce output pixel.
// Add the alpha back on if the output format is not opaque.
*reinterpret_cast<uint32_t*>(aDst) =
(rb >> (8 - aDstRGBShift)) | (g >> (8 + aSrcRGBShift - aDstRGBShift)) |
(aOpaqueAlpha ? 0xFF << aDstAShift : a << aDstAShift);
aSrc += 4;
aDst += 4;
} while (aSrc < end);
}
template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
static void PremultiplyRowFallback(const uint8_t* aSrc, uint8_t* aDst,
int32_t aLength) {
PremultiplyChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
aDstRGBShift, aDstAShift>(aSrc, aDst, aLength);
}
template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
static void PremultiplyFallback(const uint8_t* aSrc, int32_t aSrcGap,
uint8_t* aDst, int32_t aDstGap, IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
PremultiplyChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
aDstRGBShift, aDstAShift>(aSrc, aDst, aSize.width);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
#define PREMULTIPLY_FALLBACK_CASE(aSrcFormat, aDstFormat) \
FORMAT_CASE( \
aSrcFormat, aDstFormat, \
PremultiplyFallback<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat), \
RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
#define PREMULTIPLY_FALLBACK(aSrcFormat) \
PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8X8) \
PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8X8) \
PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8) \
PREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::X8R8G8B8)
#define PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW(aSrcFormat, aDstFormat, \
PremultiplyRowFallback< \
ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat), \
RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
#define PREMULTIPLY_ROW_FALLBACK(aSrcFormat) \
PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8X8) \
PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8X8) \
PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8) \
PREMULTIPLY_ROW_FALLBACK_CASE(aSrcFormat, SurfaceFormat::X8R8G8B8)
// If rows are tightly packed, and the size of the total area will fit within
// the precision range of a single row, then process all the data as if it was
// a single row.
static inline IntSize CollapseSize(const IntSize& aSize, int32_t aSrcStride,
int32_t aDstStride) {
if (aSrcStride == aDstStride && (aSrcStride & 3) == 0 &&
aSrcStride / 4 == aSize.width) {
CheckedInt32 area = CheckedInt32(aSize.width) * CheckedInt32(aSize.height);
if (area.isValid()) {
return IntSize(area.value(), 1);
}
}
return aSize;
}
static inline int32_t GetStrideGap(int32_t aWidth, SurfaceFormat aFormat,
int32_t aStride) {
CheckedInt32 used = CheckedInt32(aWidth) * BytesPerPixel(aFormat);
if (!used.isValid() || used.value() < 0) {
return -1;
}
return aStride - used.value();
}
bool PremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
SurfaceFormat aSrcFormat, uint8_t* aDst,
int32_t aDstStride, SurfaceFormat aDstFormat,
const IntSize& aSize) {
if (aSize.IsEmpty()) {
return true;
}
IntSize size = CollapseSize(aSize, aSrcStride, aDstStride);
// Find gap from end of row to the start of the next row.
int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
if (srcGap < 0 || dstGap < 0) {
return false;
}
#define FORMAT_CASE_CALL(...) __VA_ARGS__(aSrc, srcGap, aDst, dstGap, size)
#ifdef USE_SSE2
if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
default:
break;
}
#endif
#ifdef USE_NEON
if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
default:
break;
}
#endif
switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
PREMULTIPLY_FALLBACK(SurfaceFormat::B8G8R8A8)
PREMULTIPLY_FALLBACK(SurfaceFormat::R8G8B8A8)
PREMULTIPLY_FALLBACK(SurfaceFormat::A8R8G8B8)
default:
break;
}
#undef FORMAT_CASE_CALL
MOZ_ASSERT(false, "Unsupported premultiply formats");
return false;
}
SwizzleRowFn PremultiplyRow(SurfaceFormat aSrcFormat,
SurfaceFormat aDstFormat) {
#ifdef USE_SSE2
if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_ROW_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
default:
break;
}
#endif
#ifdef USE_NEON
if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8X8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8X8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
PREMULTIPLY_ROW_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
default:
break;
}
#endif
switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
PREMULTIPLY_ROW_FALLBACK(SurfaceFormat::B8G8R8A8)
PREMULTIPLY_ROW_FALLBACK(SurfaceFormat::R8G8B8A8)
PREMULTIPLY_ROW_FALLBACK(SurfaceFormat::A8R8G8B8)
default:
break;
}
MOZ_ASSERT_UNREACHABLE("Unsupported premultiply formats");
return nullptr;
}
/**
* Unpremultiplying
*/
// Generate a table of 8.16 fixed-point reciprocals representing 1/alpha.
#define UNPREMULQ(x) (0xFF00FFU / (x))
#define UNPREMULQ_2(x) UNPREMULQ(x), UNPREMULQ((x) + 1)
#define UNPREMULQ_4(x) UNPREMULQ_2(x), UNPREMULQ_2((x) + 2)
#define UNPREMULQ_8(x) UNPREMULQ_4(x), UNPREMULQ_4((x) + 4)
#define UNPREMULQ_16(x) UNPREMULQ_8(x), UNPREMULQ_8((x) + 8)
#define UNPREMULQ_32(x) UNPREMULQ_16(x), UNPREMULQ_16((x) + 16)
static const uint32_t sUnpremultiplyTable[256] = {0,
UNPREMULQ(1),
UNPREMULQ_2(2),
UNPREMULQ_4(4),
UNPREMULQ_8(8),
UNPREMULQ_16(16),
UNPREMULQ_32(32),
UNPREMULQ_32(64),
UNPREMULQ_32(96),
UNPREMULQ_32(128),
UNPREMULQ_32(160),
UNPREMULQ_32(192),
UNPREMULQ_32(224)};
// Fallback unpremultiply implementation that uses 8.16 fixed-point reciprocal
// math to eliminate any division by the alpha component. This optimization is
// used for the SSE2 and NEON implementations, with some adaptations. This
// implementation also accesses color components using individual byte accesses
// as this profiles faster than accessing the pixel as a uint32_t and
// shifting/masking to access components.
template <bool aSwapRB, uint32_t aSrcRGBIndex, uint32_t aSrcAIndex,
uint32_t aDstRGBIndex, uint32_t aDstAIndex>
static void UnpremultiplyFallback(const uint8_t* aSrc, int32_t aSrcGap,
uint8_t* aDst, int32_t aDstGap,
IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
const uint8_t* end = aSrc + 4 * aSize.width;
do {
uint8_t r = aSrc[aSrcRGBIndex + (aSwapRB ? 2 : 0)];
uint8_t g = aSrc[aSrcRGBIndex + 1];
uint8_t b = aSrc[aSrcRGBIndex + (aSwapRB ? 0 : 2)];
uint8_t a = aSrc[aSrcAIndex];
// Access the 8.16 reciprocal from the table based on alpha. Multiply by
// the reciprocal and shift off the fraction bits to approximate the
// division by alpha.
uint32_t q = sUnpremultiplyTable[a];
aDst[aDstRGBIndex + 0] = (r * q) >> 16;
aDst[aDstRGBIndex + 1] = (g * q) >> 16;
aDst[aDstRGBIndex + 2] = (b * q) >> 16;
aDst[aDstAIndex] = a;
aSrc += 4;
aDst += 4;
} while (aSrc < end);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
#define UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
UnpremultiplyFallback< \
ShouldSwapRB(aSrcFormat, aDstFormat), \
RGBByteIndex(aSrcFormat), AlphaByteIndex(aSrcFormat), \
RGBByteIndex(aDstFormat), AlphaByteIndex(aDstFormat)>)
#define UNPREMULTIPLY_FALLBACK(aSrcFormat) \
UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::B8G8R8A8) \
UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::R8G8B8A8) \
UNPREMULTIPLY_FALLBACK_CASE(aSrcFormat, SurfaceFormat::A8R8G8B8)
bool UnpremultiplyData(const uint8_t* aSrc, int32_t aSrcStride,
SurfaceFormat aSrcFormat, uint8_t* aDst,
int32_t aDstStride, SurfaceFormat aDstFormat,
const IntSize& aSize) {
if (aSize.IsEmpty()) {
return true;
}
IntSize size = CollapseSize(aSize, aSrcStride, aDstStride);
// Find gap from end of row to the start of the next row.
int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
if (srcGap < 0 || dstGap < 0) {
return false;
}
#define FORMAT_CASE_CALL(...) __VA_ARGS__(aSrc, srcGap, aDst, dstGap, size)
#ifdef USE_SSE2
if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
UNPREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
UNPREMULTIPLY_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
UNPREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
UNPREMULTIPLY_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
default:
break;
}
#endif
#ifdef USE_NEON
if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
UNPREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::B8G8R8A8)
UNPREMULTIPLY_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
UNPREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::R8G8B8A8)
UNPREMULTIPLY_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
default:
break;
}
#endif
switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
UNPREMULTIPLY_FALLBACK(SurfaceFormat::B8G8R8A8)
UNPREMULTIPLY_FALLBACK(SurfaceFormat::R8G8B8A8)
UNPREMULTIPLY_FALLBACK(SurfaceFormat::A8R8G8B8)
default:
break;
}
#undef FORMAT_CASE_CALL
MOZ_ASSERT(false, "Unsupported unpremultiply formats");
return false;
}
/**
* Swizzling
*/
// Fallback swizzle implementation that uses shifting and masking to reorder
// pixels.
template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
static void SwizzleChunkFallback(const uint8_t*& aSrc, uint8_t*& aDst,
int32_t aLength) {
const uint8_t* end = aSrc + 4 * aLength;
do {
uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
if (aSwapRB) {
// Handle R and B swaps by exchanging words and masking.
uint32_t rb =
((rgba << 16) | (rgba >> 16)) & (0x00FF00FF << aSrcRGBShift);
uint32_t ga = rgba & ((0xFF << aSrcAShift) | (0xFF00 << aSrcRGBShift));
rgba = rb | ga;
}
// If src and dst shifts differ, rotate left or right to move RGB into
// place, i.e. ARGB -> RGBA or ARGB -> RGBA.
if (aDstRGBShift > aSrcRGBShift) {
rgba = (rgba << 8) | (aOpaqueAlpha ? 0x000000FF : rgba >> 24);
} else if (aSrcRGBShift > aDstRGBShift) {
rgba = (rgba >> 8) | (aOpaqueAlpha ? 0xFF000000 : rgba << 24);
} else if (aOpaqueAlpha) {
rgba |= 0xFF << aDstAShift;
}
*reinterpret_cast<uint32_t*>(aDst) = rgba;
aSrc += 4;
aDst += 4;
} while (aSrc < end);
}
template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
static void SwizzleRowFallback(const uint8_t* aSrc, uint8_t* aDst,
int32_t aLength) {
SwizzleChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
aDstRGBShift, aDstAShift>(aSrc, aDst, aLength);
}
template <bool aSwapRB, bool aOpaqueAlpha, uint32_t aSrcRGBShift,
uint32_t aSrcAShift, uint32_t aDstRGBShift, uint32_t aDstAShift>
static void SwizzleFallback(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
SwizzleChunkFallback<aSwapRB, aOpaqueAlpha, aSrcRGBShift, aSrcAShift,
aDstRGBShift, aDstAShift>(aSrc, aDst, aSize.width);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
#define SWIZZLE_FALLBACK(aSrcFormat, aDstFormat) \
FORMAT_CASE( \
aSrcFormat, aDstFormat, \
SwizzleFallback<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat), \
RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
#define SWIZZLE_ROW_FALLBACK(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW( \
aSrcFormat, aDstFormat, \
SwizzleRowFallback<ShouldSwapRB(aSrcFormat, aDstFormat), \
ShouldForceOpaque(aSrcFormat, aDstFormat), \
RGBBitShift(aSrcFormat), AlphaBitShift(aSrcFormat), \
RGBBitShift(aDstFormat), AlphaBitShift(aDstFormat)>)
// Fast-path for matching formats.
static void SwizzleCopy(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize, int32_t aBPP) {
if (aSrc != aDst) {
int32_t rowLength = aBPP * aSize.width;
for (int32_t height = aSize.height; height > 0; height--) {
memcpy(aDst, aSrc, rowLength);
aSrc += rowLength + aSrcGap;
aDst += rowLength + aDstGap;
}
}
}
// Fast-path for conversions that swap all bytes.
template <bool aOpaqueAlpha, uint32_t aSrcAShift, uint32_t aDstAShift>
static void SwizzleChunkSwap(const uint8_t*& aSrc, uint8_t*& aDst,
int32_t aLength) {
const uint8_t* end = aSrc + 4 * aLength;
do {
// Use an endian swap to move the bytes, i.e. BGRA -> ARGB.
uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
#if MOZ_LITTLE_ENDIAN()
rgba = NativeEndian::swapToBigEndian(rgba);
#else
rgba = NativeEndian::swapToLittleEndian(rgba);
#endif
if (aOpaqueAlpha) {
rgba |= 0xFF << aDstAShift;
}
*reinterpret_cast<uint32_t*>(aDst) = rgba;
aSrc += 4;
aDst += 4;
} while (aSrc < end);
}
template <bool aOpaqueAlpha, uint32_t aSrcAShift, uint32_t aDstAShift>
static void SwizzleRowSwap(const uint8_t* aSrc, uint8_t* aDst,
int32_t aLength) {
SwizzleChunkSwap<aOpaqueAlpha, aSrcAShift, aDstAShift>(aSrc, aDst, aLength);
}
template <bool aOpaqueAlpha, uint32_t aSrcAShift, uint32_t aDstAShift>
static void SwizzleSwap(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
SwizzleChunkSwap<aOpaqueAlpha, aSrcAShift, aDstAShift>(aSrc, aDst,
aSize.width);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
#define SWIZZLE_SWAP(aSrcFormat, aDstFormat) \
FORMAT_CASE( \
aSrcFormat, aDstFormat, \
SwizzleSwap<ShouldForceOpaque(aSrcFormat, aDstFormat), \
AlphaBitShift(aSrcFormat), AlphaBitShift(aDstFormat)>)
#define SWIZZLE_ROW_SWAP(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW( \
aSrcFormat, aDstFormat, \
SwizzleRowSwap<ShouldForceOpaque(aSrcFormat, aDstFormat), \
AlphaBitShift(aSrcFormat), AlphaBitShift(aDstFormat)>)
// Fast-path for conversions that force alpha to opaque.
template <uint32_t aDstAShift>
static void SwizzleChunkOpaqueUpdate(uint8_t*& aBuffer, int32_t aLength) {
const uint8_t* end = aBuffer + 4 * aLength;
do {
uint32_t rgba = *reinterpret_cast<const uint32_t*>(aBuffer);
// Just add on the alpha bits to the source.
rgba |= 0xFF << aDstAShift;
*reinterpret_cast<uint32_t*>(aBuffer) = rgba;
aBuffer += 4;
} while (aBuffer < end);
}
template <uint32_t aDstAShift>
static void SwizzleChunkOpaqueCopy(const uint8_t*& aSrc, uint8_t* aDst,
int32_t aLength) {
const uint8_t* end = aSrc + 4 * aLength;
do {
uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
// Just add on the alpha bits to the source.
rgba |= 0xFF << aDstAShift;
*reinterpret_cast<uint32_t*>(aDst) = rgba;
aSrc += 4;
aDst += 4;
} while (aSrc < end);
}
template <uint32_t aDstAShift>
static void SwizzleRowOpaque(const uint8_t* aSrc, uint8_t* aDst,
int32_t aLength) {
if (aSrc == aDst) {
SwizzleChunkOpaqueUpdate<aDstAShift>(aDst, aLength);
} else {
SwizzleChunkOpaqueCopy<aDstAShift>(aSrc, aDst, aLength);
}
}
template <uint32_t aDstAShift>
static void SwizzleOpaque(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize) {
if (aSrc == aDst) {
// Modifying in-place, so just write out the alpha.
for (int32_t height = aSize.height; height > 0; height--) {
SwizzleChunkOpaqueUpdate<aDstAShift>(aDst, aSize.width);
aDst += aDstGap;
}
} else {
for (int32_t height = aSize.height; height > 0; height--) {
SwizzleChunkOpaqueCopy<aDstAShift>(aSrc, aDst, aSize.width);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
}
#define SWIZZLE_OPAQUE(aSrcFormat, aDstFormat) \
FORMAT_CASE(aSrcFormat, aDstFormat, SwizzleOpaque<AlphaBitShift(aDstFormat)>)
#define SWIZZLE_ROW_OPAQUE(aSrcFormat, aDstFormat) \
FORMAT_CASE_ROW(aSrcFormat, aDstFormat, \
SwizzleRowOpaque<AlphaBitShift(aDstFormat)>)
// Packing of 32-bit formats to RGB565.
template <bool aSwapRB, uint32_t aSrcRGBShift, uint32_t aSrcRGBIndex>
static void PackToRGB565(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
const uint8_t* end = aSrc + 4 * aSize.width;
do {
uint32_t rgba = *reinterpret_cast<const uint32_t*>(aSrc);
// Isolate the R, G, and B components and shift to final endian-dependent
// locations.
uint16_t rgb565;
if (aSwapRB) {
rgb565 = ((rgba & (0xF8 << aSrcRGBShift)) << (8 - aSrcRGBShift)) |
((rgba & (0xFC00 << aSrcRGBShift)) >> (5 + aSrcRGBShift)) |
((rgba & (0xF80000 << aSrcRGBShift)) >> (19 + aSrcRGBShift));
} else {
rgb565 = ((rgba & (0xF8 << aSrcRGBShift)) >> (3 + aSrcRGBShift)) |
((rgba & (0xFC00 << aSrcRGBShift)) >> (5 + aSrcRGBShift)) |
((rgba & (0xF80000 << aSrcRGBShift)) >> (8 + aSrcRGBShift));
}
*reinterpret_cast<uint16_t*>(aDst) = rgb565;
aSrc += 4;
aDst += 2;
} while (aSrc < end);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
// Packing of 32-bit formats to 24-bit formats.
template <bool aSwapRB, uint32_t aSrcRGBShift, uint32_t aSrcRGBIndex>
static void PackToRGB24(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
const uint8_t* end = aSrc + 4 * aSize.width;
do {
uint8_t r = aSrc[aSrcRGBIndex + (aSwapRB ? 2 : 0)];
uint8_t g = aSrc[aSrcRGBIndex + 1];
uint8_t b = aSrc[aSrcRGBIndex + (aSwapRB ? 0 : 2)];
aDst[0] = r;
aDst[1] = g;
aDst[2] = b;
aSrc += 4;
aDst += 3;
} while (aSrc < end);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
#define PACK_RGB_CASE(aSrcFormat, aDstFormat, aPackFunc) \
FORMAT_CASE(aSrcFormat, aDstFormat, \
aPackFunc<ShouldSwapRB(aSrcFormat, aDstFormat), \
RGBBitShift(aSrcFormat), RGBByteIndex(aSrcFormat)>)
#define PACK_RGB(aDstFormat, aPackFunc) \
PACK_RGB_CASE(SurfaceFormat::B8G8R8A8, aDstFormat, aPackFunc) \
PACK_RGB_CASE(SurfaceFormat::B8G8R8X8, aDstFormat, aPackFunc) \
PACK_RGB_CASE(SurfaceFormat::R8G8B8A8, aDstFormat, aPackFunc) \
PACK_RGB_CASE(SurfaceFormat::R8G8B8X8, aDstFormat, aPackFunc) \
PACK_RGB_CASE(SurfaceFormat::A8R8G8B8, aDstFormat, aPackFunc) \
PACK_RGB_CASE(SurfaceFormat::X8R8G8B8, aDstFormat, aPackFunc)
// Packing of 32-bit formats to A8.
template <uint32_t aSrcAIndex>
static void PackToA8(const uint8_t* aSrc, int32_t aSrcGap, uint8_t* aDst,
int32_t aDstGap, IntSize aSize) {
for (int32_t height = aSize.height; height > 0; height--) {
const uint8_t* end = aSrc + 4 * aSize.width;
do {
*aDst++ = aSrc[aSrcAIndex];
aSrc += 4;
} while (aSrc < end);
aSrc += aSrcGap;
aDst += aDstGap;
}
}
#define PACK_ALPHA_CASE(aSrcFormat, aDstFormat, aPackFunc) \
FORMAT_CASE(aSrcFormat, aDstFormat, aPackFunc<AlphaByteIndex(aSrcFormat)>)
#define PACK_ALPHA(aDstFormat, aPackFunc) \
PACK_ALPHA_CASE(SurfaceFormat::B8G8R8A8, aDstFormat, aPackFunc) \
PACK_ALPHA_CASE(SurfaceFormat::R8G8B8A8, aDstFormat, aPackFunc) \
PACK_ALPHA_CASE(SurfaceFormat::A8R8G8B8, aDstFormat, aPackFunc)
template <bool aSwapRB>
void UnpackRowRGB24(const uint8_t* aSrc, uint8_t* aDst, int32_t aLength) {
// Because we are expanding, we can only process the data back to front in
// case we are performing this in place.
const uint8_t* src = aSrc + 3 * (aLength - 1);
uint32_t* dst = reinterpret_cast<uint32_t*>(aDst + 4 * aLength);
while (src >= aSrc) {
uint8_t r = src[aSwapRB ? 2 : 0];
uint8_t g = src[1];
uint8_t b = src[aSwapRB ? 0 : 2];
#if MOZ_LITTLE_ENDIAN()
*--dst = 0xFF000000 | (b << 16) | (g << 8) | r;
#else
*--dst = 0x000000FF | (b << 8) | (g << 16) | (r << 24);
#endif
src -= 3;
}
}
// Force instantiation of swizzle variants here.
template void UnpackRowRGB24<false>(const uint8_t*, uint8_t*, int32_t);
template void UnpackRowRGB24<true>(const uint8_t*, uint8_t*, int32_t);
#define UNPACK_ROW_RGB(aDstFormat) \
FORMAT_CASE_ROW( \
SurfaceFormat::R8G8B8, aDstFormat, \
UnpackRowRGB24<ShouldSwapRB(SurfaceFormat::R8G8B8, aDstFormat)>)
static void UnpackRowRGB24_To_ARGB(const uint8_t* aSrc, uint8_t* aDst,
int32_t aLength) {
// Because we are expanding, we can only process the data back to front in
// case we are performing this in place.
const uint8_t* src = aSrc + 3 * (aLength - 1);
uint32_t* dst = reinterpret_cast<uint32_t*>(aDst + 4 * aLength);
while (src >= aSrc) {
uint8_t r = src[0];
uint8_t g = src[1];
uint8_t b = src[2];
#if MOZ_LITTLE_ENDIAN()
*--dst = 0x000000FF | (r << 8) | (g << 16) | (b << 24);
#else
*--dst = 0xFF000000 | (r << 24) | (g << 16) | b;
#endif
src -= 3;
}
}
#define UNPACK_ROW_RGB_TO_ARGB(aDstFormat) \
FORMAT_CASE_ROW(SurfaceFormat::R8G8B8, aDstFormat, UnpackRowRGB24_To_ARGB)
bool SwizzleData(const uint8_t* aSrc, int32_t aSrcStride,
SurfaceFormat aSrcFormat, uint8_t* aDst, int32_t aDstStride,
SurfaceFormat aDstFormat, const IntSize& aSize) {
if (aSize.IsEmpty()) {
return true;
}
IntSize size = CollapseSize(aSize, aSrcStride, aDstStride);
// Find gap from end of row to the start of the next row.
int32_t srcGap = GetStrideGap(aSize.width, aSrcFormat, aSrcStride);
int32_t dstGap = GetStrideGap(aSize.width, aDstFormat, aDstStride);
MOZ_ASSERT(srcGap >= 0 && dstGap >= 0);
if (srcGap < 0 || dstGap < 0) {
return false;
}
#define FORMAT_CASE_CALL(...) __VA_ARGS__(aSrc, srcGap, aDst, dstGap, size)
#ifdef USE_SSE2
if (mozilla::supports_sse2()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
SWIZZLE_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
SWIZZLE_SSE2(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
SWIZZLE_SSE2(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
SWIZZLE_SSE2(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
SWIZZLE_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
SWIZZLE_SSE2(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
SWIZZLE_SSE2(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
SWIZZLE_SSE2(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
default:
break;
}
#endif
#ifdef USE_NEON
if (mozilla::supports_neon()) switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
SWIZZLE_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
SWIZZLE_NEON(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
SWIZZLE_NEON(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
SWIZZLE_NEON(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
SWIZZLE_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
SWIZZLE_NEON(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
SWIZZLE_NEON(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
SWIZZLE_NEON(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
default:
break;
}
#endif
switch (FORMAT_KEY(aSrcFormat, aDstFormat)) {
SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8A8)
SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8X8)
SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8A8, SurfaceFormat::R8G8B8X8)
SWIZZLE_FALLBACK(SurfaceFormat::B8G8R8X8, SurfaceFormat::R8G8B8A8)
SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8A8)
SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8X8)
SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::B8G8R8X8)
SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::B8G8R8A8)
SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8A8, SurfaceFormat::A8R8G8B8)
SWIZZLE_FALLBACK(SurfaceFormat::R8G8B8X8, SurfaceFormat::X8R8G8B8)
SWIZZLE_FALLBACK(SurfaceFormat::A8R8G8B8, SurfaceFormat::R8G8B8A8)
SWIZZLE_FALLBACK(SurfaceFormat::X8R8G8B8, SurfaceFormat::R8G8B8X8)
SWIZZLE_FALLBACK(SurfaceFormat::A8R8G8B8, SurfaceFormat::R8G8B8X8)
SWIZZLE_FALLBACK(SurfaceFormat::X8R8G8B8, SurfaceFormat::R8G8B8A8)
SWIZZLE_SWAP(SurfaceFormat::B8G8R8A8, SurfaceFormat::A8R8G8B8)