-
Notifications
You must be signed in to change notification settings - Fork 54
/
gfxUtils.cpp
1449 lines (1250 loc) · 50.2 KB
/
gfxUtils.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: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 "gfxUtils.h"
#include "cairo.h"
#include "gfxContext.h"
#include "gfxEnv.h"
#include "gfxImageSurface.h"
#include "gfxPlatform.h"
#include "gfxDrawable.h"
#include "gfxQuad.h"
#include "imgIEncoder.h"
#include "mozilla/Base64.h"
#include "mozilla/dom/ImageEncoder.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/WorkerRunnable.h"
#include "mozilla/gfx/2D.h"
#include "mozilla/gfx/DataSurfaceHelpers.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/gfx/PathHelpers.h"
#include "mozilla/gfx/Swizzle.h"
#include "mozilla/gfx/gfxVars.h"
#include "mozilla/Maybe.h"
#include "mozilla/RefPtr.h"
#include "mozilla/UniquePtrExtensions.h"
#include "mozilla/Unused.h"
#include "mozilla/Vector.h"
#include "mozilla/webrender/webrender_ffi.h"
#include "nsAppRunner.h"
#include "nsComponentManagerUtils.h"
#include "nsIClipboardHelper.h"
#include "nsIFile.h"
#include "nsIGfxInfo.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsRegion.h"
#include "nsServiceManagerUtils.h"
#include "GeckoProfiler.h"
#include "ImageContainer.h"
#include "ImageRegion.h"
#include "gfx2DGlue.h"
#include "gfxPrefs.h"
#ifdef XP_WIN
#include "gfxWindowsPlatform.h"
#endif
using namespace mozilla;
using namespace mozilla::image;
using namespace mozilla::layers;
using namespace mozilla::gfx;
#undef compress
#include "mozilla/Compression.h"
using namespace mozilla::Compression;
extern "C" {
/**
* Dump a raw image to the default log. This function is exported
* from libxul, so it can be called from any library in addition to
* (of course) from a debugger.
*
* Note: this helper currently assumes that all 2-bytepp images are
* r5g6b5, and that all 4-bytepp images are r8g8b8a8.
*/
NS_EXPORT
void mozilla_dump_image(void* bytes, int width, int height, int bytepp,
int strideBytes) {
if (0 == strideBytes) {
strideBytes = width * bytepp;
}
SurfaceFormat format;
// TODO more flexible; parse string?
switch (bytepp) {
case 2:
format = SurfaceFormat::R5G6B5_UINT16;
break;
case 4:
default:
format = SurfaceFormat::R8G8B8A8;
break;
}
RefPtr<DataSourceSurface> surf = Factory::CreateWrappingDataSourceSurface(
(uint8_t*)bytes, strideBytes, IntSize(width, height), format);
gfxUtils::DumpAsDataURI(surf);
}
}
static bool MapSrcDest(DataSourceSurface* srcSurf, DataSourceSurface* destSurf,
DataSourceSurface::MappedSurface* out_srcMap,
DataSourceSurface::MappedSurface* out_destMap) {
MOZ_ASSERT(srcSurf && destSurf);
MOZ_ASSERT(out_srcMap && out_destMap);
if (srcSurf->GetSize() != destSurf->GetSize()) {
MOZ_ASSERT(false, "Width and height must match.");
return false;
}
if (srcSurf == destSurf) {
DataSourceSurface::MappedSurface map;
if (!srcSurf->Map(DataSourceSurface::MapType::READ_WRITE, &map)) {
NS_WARNING("Couldn't Map srcSurf/destSurf.");
return false;
}
*out_srcMap = map;
*out_destMap = map;
return true;
}
// Map src for reading.
DataSourceSurface::MappedSurface srcMap;
if (!srcSurf->Map(DataSourceSurface::MapType::READ, &srcMap)) {
NS_WARNING("Couldn't Map srcSurf.");
return false;
}
// Map dest for writing.
DataSourceSurface::MappedSurface destMap;
if (!destSurf->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
NS_WARNING("Couldn't Map aDest.");
srcSurf->Unmap();
return false;
}
*out_srcMap = srcMap;
*out_destMap = destMap;
return true;
}
static void UnmapSrcDest(DataSourceSurface* srcSurf,
DataSourceSurface* destSurf) {
if (srcSurf == destSurf) {
srcSurf->Unmap();
} else {
srcSurf->Unmap();
destSurf->Unmap();
}
}
bool gfxUtils::PremultiplyDataSurface(DataSourceSurface* srcSurf,
DataSourceSurface* destSurf) {
MOZ_ASSERT(srcSurf && destSurf);
DataSourceSurface::MappedSurface srcMap;
DataSourceSurface::MappedSurface destMap;
if (!MapSrcDest(srcSurf, destSurf, &srcMap, &destMap)) return false;
PremultiplyData(srcMap.mData, srcMap.mStride, srcSurf->GetFormat(),
destMap.mData, destMap.mStride, destSurf->GetFormat(),
srcSurf->GetSize());
UnmapSrcDest(srcSurf, destSurf);
return true;
}
bool gfxUtils::UnpremultiplyDataSurface(DataSourceSurface* srcSurf,
DataSourceSurface* destSurf) {
MOZ_ASSERT(srcSurf && destSurf);
DataSourceSurface::MappedSurface srcMap;
DataSourceSurface::MappedSurface destMap;
if (!MapSrcDest(srcSurf, destSurf, &srcMap, &destMap)) return false;
UnpremultiplyData(srcMap.mData, srcMap.mStride, srcSurf->GetFormat(),
destMap.mData, destMap.mStride, destSurf->GetFormat(),
srcSurf->GetSize());
UnmapSrcDest(srcSurf, destSurf);
return true;
}
static bool MapSrcAndCreateMappedDest(
DataSourceSurface* srcSurf, RefPtr<DataSourceSurface>* out_destSurf,
DataSourceSurface::MappedSurface* out_srcMap,
DataSourceSurface::MappedSurface* out_destMap) {
MOZ_ASSERT(srcSurf);
MOZ_ASSERT(out_destSurf && out_srcMap && out_destMap);
// Ok, map source for reading.
DataSourceSurface::MappedSurface srcMap;
if (!srcSurf->Map(DataSourceSurface::MapType::READ, &srcMap)) {
MOZ_ASSERT(false, "Couldn't Map srcSurf.");
return false;
}
// Make our dest surface based on the src.
RefPtr<DataSourceSurface> destSurf =
Factory::CreateDataSourceSurfaceWithStride(
srcSurf->GetSize(), srcSurf->GetFormat(), srcMap.mStride);
if (NS_WARN_IF(!destSurf)) {
return false;
}
DataSourceSurface::MappedSurface destMap;
if (!destSurf->Map(DataSourceSurface::MapType::WRITE, &destMap)) {
MOZ_ASSERT(false, "Couldn't Map destSurf.");
srcSurf->Unmap();
return false;
}
*out_destSurf = destSurf;
*out_srcMap = srcMap;
*out_destMap = destMap;
return true;
}
already_AddRefed<DataSourceSurface> gfxUtils::CreatePremultipliedDataSurface(
DataSourceSurface* srcSurf) {
RefPtr<DataSourceSurface> destSurf;
DataSourceSurface::MappedSurface srcMap;
DataSourceSurface::MappedSurface destMap;
if (!MapSrcAndCreateMappedDest(srcSurf, &destSurf, &srcMap, &destMap)) {
MOZ_ASSERT(false, "MapSrcAndCreateMappedDest failed.");
RefPtr<DataSourceSurface> surface(srcSurf);
return surface.forget();
}
PremultiplyData(srcMap.mData, srcMap.mStride, srcSurf->GetFormat(),
destMap.mData, destMap.mStride, destSurf->GetFormat(),
srcSurf->GetSize());
UnmapSrcDest(srcSurf, destSurf);
return destSurf.forget();
}
already_AddRefed<DataSourceSurface> gfxUtils::CreateUnpremultipliedDataSurface(
DataSourceSurface* srcSurf) {
RefPtr<DataSourceSurface> destSurf;
DataSourceSurface::MappedSurface srcMap;
DataSourceSurface::MappedSurface destMap;
if (!MapSrcAndCreateMappedDest(srcSurf, &destSurf, &srcMap, &destMap)) {
MOZ_ASSERT(false, "MapSrcAndCreateMappedDest failed.");
RefPtr<DataSourceSurface> surface(srcSurf);
return surface.forget();
}
UnpremultiplyData(srcMap.mData, srcMap.mStride, srcSurf->GetFormat(),
destMap.mData, destMap.mStride, destSurf->GetFormat(),
srcSurf->GetSize());
UnmapSrcDest(srcSurf, destSurf);
return destSurf.forget();
}
void gfxUtils::ConvertBGRAtoRGBA(uint8_t* aData, uint32_t aLength) {
MOZ_ASSERT((aLength % 4) == 0, "Loop below will pass srcEnd!");
SwizzleData(aData, aLength, SurfaceFormat::B8G8R8A8, aData, aLength,
SurfaceFormat::R8G8B8A8, IntSize(aLength / 4, 1));
}
#if !defined(MOZ_GFX_OPTIMIZE_MOBILE)
/**
* This returns the fastest operator to use for solid surfaces which have no
* alpha channel or their alpha channel is uniformly opaque.
* This differs per render mode.
*/
static CompositionOp OptimalFillOp() {
#ifdef XP_WIN
if (gfxWindowsPlatform::GetPlatform()->IsDirect2DBackend()) {
// D2D -really- hates operator source.
return CompositionOp::OP_OVER;
}
#endif
return CompositionOp::OP_SOURCE;
}
// EXTEND_PAD won't help us here; we have to create a temporary surface to hold
// the subimage of pixels we're allowed to sample.
static already_AddRefed<gfxDrawable> CreateSamplingRestrictedDrawable(
gfxDrawable* aDrawable, gfxContext* aContext, const ImageRegion& aRegion,
const SurfaceFormat aFormat, bool aUseOptimalFillOp) {
AUTO_PROFILER_LABEL("CreateSamplingRestrictedDrawable", GRAPHICS);
DrawTarget* destDrawTarget = aContext->GetDrawTarget();
if (destDrawTarget->GetBackendType() == BackendType::DIRECT2D1_1) {
return nullptr;
}
gfxRect clipExtents = aContext->GetClipExtents();
// Inflate by one pixel because bilinear filtering will sample at most
// one pixel beyond the computed image pixel coordinate.
clipExtents.Inflate(1.0);
gfxRect needed = aRegion.IntersectAndRestrict(clipExtents);
needed.RoundOut();
// if 'needed' is empty, nothing will be drawn since aFill
// must be entirely outside the clip region, so it doesn't
// matter what we do here, but we should avoid trying to
// create a zero-size surface.
if (needed.IsEmpty()) return nullptr;
IntSize size(int32_t(needed.Width()), int32_t(needed.Height()));
RefPtr<DrawTarget> target =
gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(size,
aFormat);
if (!target || !target->IsValid()) {
return nullptr;
}
RefPtr<gfxContext> tmpCtx = gfxContext::CreateOrNull(target);
MOZ_ASSERT(tmpCtx); // already checked the target above
if (aUseOptimalFillOp) {
tmpCtx->SetOp(OptimalFillOp());
}
aDrawable->Draw(tmpCtx, needed - needed.TopLeft(), ExtendMode::REPEAT,
SamplingFilter::LINEAR, 1.0,
gfxMatrix::Translation(needed.TopLeft()));
RefPtr<SourceSurface> surface = target->Snapshot();
RefPtr<gfxDrawable> drawable = new gfxSurfaceDrawable(
surface, size, gfxMatrix::Translation(-needed.TopLeft()));
return drawable.forget();
}
#endif // !MOZ_GFX_OPTIMIZE_MOBILE
/* These heuristics are based on
* Source/WebCore/platform/graphics/skia/ImageSkia.cpp:computeResamplingMode()
*/
#ifdef MOZ_GFX_OPTIMIZE_MOBILE
static SamplingFilter ReduceResamplingFilter(SamplingFilter aSamplingFilter,
int aImgWidth, int aImgHeight,
float aSourceWidth,
float aSourceHeight) {
// Images smaller than this in either direction are considered "small" and
// are not resampled ever (see below).
const int kSmallImageSizeThreshold = 8;
// The amount an image can be stretched in a single direction before we
// say that it is being stretched so much that it must be a line or
// background that doesn't need resampling.
const float kLargeStretch = 3.0f;
if (aImgWidth <= kSmallImageSizeThreshold ||
aImgHeight <= kSmallImageSizeThreshold) {
// Never resample small images. These are often used for borders and
// rules (think 1x1 images used to make lines).
return SamplingFilter::POINT;
}
if (aImgHeight * kLargeStretch <= aSourceHeight ||
aImgWidth * kLargeStretch <= aSourceWidth) {
// Large image tiling detected.
// Don't resample if it is being tiled a lot in only one direction.
// This is trying to catch cases where somebody has created a border
// (which might be large) and then is stretching it to fill some part
// of the page.
if (fabs(aSourceWidth - aImgWidth) / aImgWidth < 0.5 ||
fabs(aSourceHeight - aImgHeight) / aImgHeight < 0.5)
return SamplingFilter::POINT;
// The image is growing a lot and in more than one direction. Resampling
// is slow and doesn't give us very much when growing a lot.
return aSamplingFilter;
}
/* Some notes on other heuristics:
The Skia backend also uses nearest for backgrounds that are stretched by
a large amount. I'm not sure this is common enough for us to worry about
now. It also uses nearest for backgrounds/avoids high quality for images
that are very slightly scaled. I'm also not sure that very slightly
scaled backgrounds are common enough us to worry about.
We don't currently have much support for doing high quality interpolation.
The only place this currently happens is on Quartz and we don't have as
much control over it as would be needed. Webkit avoids using high quality
resampling during load. It also avoids high quality if the transformation
is not just a scale and translation
WebKit bug #40045 added code to avoid resampling different parts
of an image with different methods by using a resampling hint size.
It currently looks unused in WebKit but it's something to watch out for.
*/
return aSamplingFilter;
}
#else
static SamplingFilter ReduceResamplingFilter(SamplingFilter aSamplingFilter,
int aImgWidth, int aImgHeight,
int aSourceWidth,
int aSourceHeight) {
// Just pass the filter through unchanged
return aSamplingFilter;
}
#endif
#ifdef MOZ_WIDGET_COCOA
// Only prescale a temporary surface if we're going to repeat it often.
// Scaling is expensive on OS X and without prescaling, we'd scale
// every tile of the repeated rect. However, using a temp surface also
// potentially uses more memory if the scaled image is large. So only prescale
// on a temp surface if we know we're going to repeat the image in either the X
// or Y axis multiple times.
static bool ShouldUseTempSurface(Rect aImageRect, Rect aNeededRect) {
int repeatX = aNeededRect.width / aImageRect.width;
int repeatY = aNeededRect.height / aImageRect.height;
return (repeatX >= 5) || (repeatY >= 5);
}
static bool PrescaleAndTileDrawable(gfxDrawable* aDrawable,
gfxContext* aContext,
const ImageRegion& aRegion, Rect aImageRect,
const SamplingFilter aSamplingFilter,
const SurfaceFormat aFormat,
gfxFloat aOpacity, ExtendMode aExtendMode) {
Size scaleFactor = aContext->CurrentMatrix().ScaleFactors(true);
Matrix scaleMatrix = Matrix::Scaling(scaleFactor.width, scaleFactor.height);
const float fuzzFactor = 0.01;
// If we aren't scaling or translating, don't go down this path
if ((FuzzyEqual(scaleFactor.width, 1.0, fuzzFactor) &&
FuzzyEqual(scaleFactor.width, 1.0, fuzzFactor)) ||
aContext->CurrentMatrix().HasNonAxisAlignedTransform()) {
return false;
}
gfxRect clipExtents = aContext->GetClipExtents();
// Inflate by one pixel because bilinear filtering will sample at most
// one pixel beyond the computed image pixel coordinate.
clipExtents.Inflate(1.0);
gfxRect needed = aRegion.IntersectAndRestrict(clipExtents);
Rect scaledNeededRect = scaleMatrix.TransformBounds(ToRect(needed));
scaledNeededRect.RoundOut();
if (scaledNeededRect.IsEmpty()) {
return false;
}
Rect scaledImageRect = scaleMatrix.TransformBounds(aImageRect);
if (!ShouldUseTempSurface(scaledImageRect, scaledNeededRect)) {
return false;
}
IntSize scaledImageSize((int32_t)scaledImageRect.width,
(int32_t)scaledImageRect.height);
if (scaledImageSize.width != scaledImageRect.width ||
scaledImageSize.height != scaledImageRect.height) {
// If the scaled image isn't pixel aligned, we'll get artifacts
// so we have to take the slow path.
return false;
}
RefPtr<DrawTarget> scaledDT =
gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
scaledImageSize, aFormat);
if (!scaledDT || !scaledDT->IsValid()) {
return false;
}
RefPtr<gfxContext> tmpCtx = gfxContext::CreateOrNull(scaledDT);
MOZ_ASSERT(tmpCtx); // already checked the target above
scaledDT->SetTransform(scaleMatrix);
gfxRect gfxImageRect(aImageRect.x, aImageRect.y, aImageRect.width,
aImageRect.height);
// Since this is just the scaled image, we don't want to repeat anything yet.
aDrawable->Draw(tmpCtx, gfxImageRect, ExtendMode::CLAMP, aSamplingFilter, 1.0,
gfxMatrix());
RefPtr<SourceSurface> scaledImage = scaledDT->Snapshot();
{
gfxContextMatrixAutoSaveRestore autoSR(aContext);
Matrix withoutScale = aContext->CurrentMatrix();
DrawTarget* destDrawTarget = aContext->GetDrawTarget();
// The translation still is in scaled units
withoutScale.PreScale(1.0 / scaleFactor.width, 1.0 / scaleFactor.height);
aContext->SetMatrix(withoutScale);
DrawOptions drawOptions(aOpacity, aContext->CurrentOp(),
aContext->CurrentAntialiasMode());
SurfacePattern scaledImagePattern(scaledImage, aExtendMode, Matrix(),
aSamplingFilter);
destDrawTarget->FillRect(scaledNeededRect, scaledImagePattern, drawOptions);
}
return true;
}
#endif // MOZ_WIDGET_COCOA
/* static */ void gfxUtils::DrawPixelSnapped(
gfxContext* aContext, gfxDrawable* aDrawable, const gfxSize& aImageSize,
const ImageRegion& aRegion, const SurfaceFormat aFormat,
SamplingFilter aSamplingFilter, uint32_t aImageFlags, gfxFloat aOpacity,
bool aUseOptimalFillOp) {
AUTO_PROFILER_LABEL("gfxUtils::DrawPixelSnapped", GRAPHICS);
gfxRect imageRect(gfxPoint(0, 0), aImageSize);
gfxRect region(aRegion.Rect());
ExtendMode extendMode = aRegion.GetExtendMode();
RefPtr<gfxDrawable> drawable = aDrawable;
aSamplingFilter = ReduceResamplingFilter(aSamplingFilter, imageRect.Width(),
imageRect.Height(), region.Width(),
region.Height());
// OK now, the hard part left is to account for the subimage sampling
// restriction. If all the transforms involved are just integer
// translations, then we assume no resampling will occur so there's
// nothing to do.
// XXX if only we had source-clipping in cairo!
if (aContext->CurrentMatrix().HasNonIntegerTranslation()) {
if ((extendMode != ExtendMode::CLAMP) ||
!aRegion.RestrictionContains(imageRect)) {
if (drawable->DrawWithSamplingRect(
aContext->GetDrawTarget(), aContext->CurrentOp(),
aContext->CurrentAntialiasMode(), aRegion.Rect(),
aRegion.Restriction(), extendMode, aSamplingFilter, aOpacity)) {
return;
}
#ifdef MOZ_WIDGET_COCOA
if (PrescaleAndTileDrawable(aDrawable, aContext, aRegion,
ToRect(imageRect), aSamplingFilter, aFormat,
aOpacity, extendMode)) {
return;
}
#endif
// On Mobile, we don't ever want to do this; it has the potential for
// allocating very large temporary surfaces, especially since we'll
// do full-page snapshots often (see bug 749426).
#if !defined(MOZ_GFX_OPTIMIZE_MOBILE)
RefPtr<gfxDrawable> restrictedDrawable = CreateSamplingRestrictedDrawable(
aDrawable, aContext, aRegion, aFormat, aUseOptimalFillOp);
if (restrictedDrawable) {
drawable.swap(restrictedDrawable);
// We no longer need to tile: Either we never needed to, or we already
// filled a surface with the tiled pattern; this surface can now be
// drawn without tiling.
extendMode = ExtendMode::CLAMP;
}
#endif
}
}
drawable->Draw(aContext, aRegion.Rect(), extendMode, aSamplingFilter,
aOpacity, gfxMatrix());
}
/* static */ int gfxUtils::ImageFormatToDepth(gfxImageFormat aFormat) {
switch (aFormat) {
case SurfaceFormat::A8R8G8B8_UINT32:
return 32;
case SurfaceFormat::X8R8G8B8_UINT32:
return 24;
case SurfaceFormat::R5G6B5_UINT16:
return 16;
default:
break;
}
return 0;
}
/*static*/ void gfxUtils::ClipToRegion(gfxContext* aContext,
const nsIntRegion& aRegion) {
aContext->NewPath();
for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
const IntRect& r = iter.Get();
aContext->Rectangle(gfxRect(r.X(), r.Y(), r.Width(), r.Height()));
}
aContext->Clip();
}
/*static*/ void gfxUtils::ClipToRegion(DrawTarget* aTarget,
const nsIntRegion& aRegion) {
uint32_t numRects = aRegion.GetNumRects();
// If there is only one rect, then the region bounds are equivalent to the
// contents. So just use push a single clip rect with the bounds.
if (numRects == 1) {
aTarget->PushClipRect(Rect(aRegion.GetBounds()));
return;
}
// Check if the target's transform will preserve axis-alignment and
// pixel-alignment for each rect. For now, just handle the common case
// of integer translations.
Matrix transform = aTarget->GetTransform();
if (transform.IsIntegerTranslation()) {
IntPoint translation = RoundedToInt(transform.GetTranslation());
AutoTArray<IntRect, 16> rects;
rects.SetLength(numRects);
uint32_t i = 0;
// Build the list of transformed rects by adding in the translation.
for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
IntRect rect = iter.Get();
rect.MoveBy(translation);
rects[i++] = rect;
}
aTarget->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
} else {
// The transform does not produce axis-aligned rects or a rect was not
// pixel-aligned. So just build a path with all the rects and clip to it
// instead.
RefPtr<PathBuilder> pathBuilder = aTarget->CreatePathBuilder();
for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
AppendRectToPath(pathBuilder, Rect(iter.Get()));
}
RefPtr<Path> path = pathBuilder->Finish();
aTarget->PushClip(path);
}
}
/*static*/ float gfxUtils::ClampToScaleFactor(float aVal, bool aRoundDown) {
// Arbitary scale factor limitation. We can increase this
// for better scaling performance at the cost of worse
// quality.
static const float kScaleResolution = 2;
// Negative scaling is just a flip and irrelevant to
// our resolution calculation.
if (aVal < 0.0) {
aVal = -aVal;
}
bool inverse = false;
if (aVal < 1.0) {
inverse = true;
aVal = 1 / aVal;
}
float power = logf(aVal) / logf(kScaleResolution);
// If power is within 1e-5 of an integer, round to nearest to
// prevent floating point errors, otherwise round up to the
// next integer value.
if (fabs(power - NS_round(power)) < 1e-5) {
power = NS_round(power);
// Use floor when we are either inverted or rounding down, but
// not both.
} else if (inverse != aRoundDown) {
power = floor(power);
// Otherwise, ceil when we are not inverted and not rounding
// down, or we are inverted and rounding down.
} else {
power = ceil(power);
}
float scale = powf(kScaleResolution, power);
if (inverse) {
scale = 1 / scale;
}
return scale;
}
gfxMatrix gfxUtils::TransformRectToRect(const gfxRect& aFrom,
const gfxPoint& aToTopLeft,
const gfxPoint& aToTopRight,
const gfxPoint& aToBottomRight) {
gfxMatrix m;
if (aToTopRight.y == aToTopLeft.y && aToTopRight.x == aToBottomRight.x) {
// Not a rotation, so xy and yx are zero
m._21 = m._12 = 0.0;
m._11 = (aToBottomRight.x - aToTopLeft.x) / aFrom.Width();
m._22 = (aToBottomRight.y - aToTopLeft.y) / aFrom.Height();
m._31 = aToTopLeft.x - m._11 * aFrom.X();
m._32 = aToTopLeft.y - m._22 * aFrom.Y();
} else {
NS_ASSERTION(
aToTopRight.y == aToBottomRight.y && aToTopRight.x == aToTopLeft.x,
"Destination rectangle not axis-aligned");
m._11 = m._22 = 0.0;
m._21 = (aToBottomRight.x - aToTopLeft.x) / aFrom.Height();
m._12 = (aToBottomRight.y - aToTopLeft.y) / aFrom.Width();
m._31 = aToTopLeft.x - m._21 * aFrom.Y();
m._32 = aToTopLeft.y - m._12 * aFrom.X();
}
return m;
}
Matrix gfxUtils::TransformRectToRect(const gfxRect& aFrom,
const IntPoint& aToTopLeft,
const IntPoint& aToTopRight,
const IntPoint& aToBottomRight) {
Matrix m;
if (aToTopRight.y == aToTopLeft.y && aToTopRight.x == aToBottomRight.x) {
// Not a rotation, so xy and yx are zero
m._12 = m._21 = 0.0;
m._11 = (aToBottomRight.x - aToTopLeft.x) / aFrom.Width();
m._22 = (aToBottomRight.y - aToTopLeft.y) / aFrom.Height();
m._31 = aToTopLeft.x - m._11 * aFrom.X();
m._32 = aToTopLeft.y - m._22 * aFrom.Y();
} else {
NS_ASSERTION(
aToTopRight.y == aToBottomRight.y && aToTopRight.x == aToTopLeft.x,
"Destination rectangle not axis-aligned");
m._11 = m._22 = 0.0;
m._21 = (aToBottomRight.x - aToTopLeft.x) / aFrom.Height();
m._12 = (aToBottomRight.y - aToTopLeft.y) / aFrom.Width();
m._31 = aToTopLeft.x - m._21 * aFrom.Y();
m._32 = aToTopLeft.y - m._12 * aFrom.X();
}
return m;
}
/* This function is sort of shitty. We truncate doubles
* to ints then convert those ints back to doubles to make sure that
* they equal the doubles that we got in. */
bool gfxUtils::GfxRectToIntRect(const gfxRect& aIn, IntRect* aOut) {
*aOut = IntRect(int32_t(aIn.X()), int32_t(aIn.Y()), int32_t(aIn.Width()),
int32_t(aIn.Height()));
return gfxRect(aOut->X(), aOut->Y(), aOut->Width(), aOut->Height())
.IsEqualEdges(aIn);
}
/* Clamp r to CAIRO_COORD_MIN .. CAIRO_COORD_MAX
* these are to be device coordinates.
*
* Cairo is currently using 24.8 fixed point,
* so -2^24 .. 2^24-1 is our valid
*/
/*static*/ void gfxUtils::ConditionRect(gfxRect& aRect) {
#define CAIRO_COORD_MAX (16777215.0)
#define CAIRO_COORD_MIN (-16777216.0)
// if either x or y is way out of bounds;
// note that we don't handle negative w/h here
if (aRect.X() > CAIRO_COORD_MAX) {
aRect.SetRectX(CAIRO_COORD_MAX, 0.0);
}
if (aRect.Y() > CAIRO_COORD_MAX) {
aRect.SetRectY(CAIRO_COORD_MAX, 0.0);
}
if (aRect.X() < CAIRO_COORD_MIN) {
aRect.SetWidth(aRect.XMost() - CAIRO_COORD_MIN);
if (aRect.Width() < 0.0) {
aRect.SetWidth(0.0);
}
aRect.MoveToX(CAIRO_COORD_MIN);
}
if (aRect.Y() < CAIRO_COORD_MIN) {
aRect.SetHeight(aRect.YMost() - CAIRO_COORD_MIN);
if (aRect.Height() < 0.0) {
aRect.SetHeight(0.0);
}
aRect.MoveToY(CAIRO_COORD_MIN);
}
if (aRect.XMost() > CAIRO_COORD_MAX) {
aRect.SetRightEdge(CAIRO_COORD_MAX);
}
if (aRect.YMost() > CAIRO_COORD_MAX) {
aRect.SetBottomEdge(CAIRO_COORD_MAX);
}
#undef CAIRO_COORD_MAX
#undef CAIRO_COORD_MIN
}
/*static*/ gfxQuad gfxUtils::TransformToQuad(
const gfxRect& aRect, const mozilla::gfx::Matrix4x4& aMatrix) {
gfxPoint points[4];
points[0] = aMatrix.TransformPoint(aRect.TopLeft());
points[1] = aMatrix.TransformPoint(aRect.TopRight());
points[2] = aMatrix.TransformPoint(aRect.BottomRight());
points[3] = aMatrix.TransformPoint(aRect.BottomLeft());
// Could this ever result in lines that intersect? I don't think so.
return gfxQuad(points[0], points[1], points[2], points[3]);
}
/* static */ void gfxUtils::ClearThebesSurface(gfxASurface* aSurface) {
if (aSurface->CairoStatus()) {
return;
}
cairo_surface_t* surf = aSurface->CairoSurface();
if (cairo_surface_status(surf)) {
return;
}
cairo_t* ctx = cairo_create(surf);
cairo_set_source_rgba(ctx, 0.0, 0.0, 0.0, 0.0);
cairo_set_operator(ctx, CAIRO_OPERATOR_SOURCE);
IntRect bounds(nsIntPoint(0, 0), aSurface->GetSize());
cairo_rectangle(ctx, bounds.X(), bounds.Y(), bounds.Width(), bounds.Height());
cairo_fill(ctx);
cairo_destroy(ctx);
}
/* static */ already_AddRefed<DataSourceSurface>
gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(SourceSurface* aSurface,
SurfaceFormat aFormat) {
MOZ_ASSERT(aFormat != aSurface->GetFormat(),
"Unnecessary - and very expersive - surface format conversion");
Rect bounds(0, 0, aSurface->GetSize().width, aSurface->GetSize().height);
if (!aSurface->IsDataSourceSurface()) {
// If the surface is NOT of type DATA then its data is not mapped into main
// memory. Format conversion is probably faster on the GPU, and by doing it
// there we can avoid any expensive uploads/readbacks except for (possibly)
// a single readback due to the unavoidable GetDataSurface() call. Using
// CreateOffscreenContentDrawTarget ensures the conversion happens on the
// GPU.
RefPtr<DrawTarget> dt =
gfxPlatform::GetPlatform()->CreateOffscreenContentDrawTarget(
aSurface->GetSize(), aFormat);
if (!dt) {
gfxWarning() << "gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat "
"failed in CreateOffscreenContentDrawTarget";
return nullptr;
}
// Using DrawSurface() here rather than CopySurface() because CopySurface
// is optimized for memcpy and therefore isn't good for format conversion.
// Using OP_OVER since in our case it's equivalent to OP_SOURCE and
// generally more optimized.
dt->DrawSurface(aSurface, bounds, bounds, DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_OVER));
RefPtr<SourceSurface> surface = dt->Snapshot();
return surface->GetDataSurface();
}
// If the surface IS of type DATA then it may or may not be in main memory
// depending on whether or not it has been mapped yet. We have no way of
// knowing, so we can't be sure if it's best to create a data wrapping
// DrawTarget for the conversion or an offscreen content DrawTarget. We could
// guess it's not mapped and create an offscreen content DrawTarget, but if
// it is then we'll end up uploading the surface data, and most likely the
// caller is going to be accessing the resulting surface data, resulting in a
// readback (both very expensive operations). Alternatively we could guess
// the data is mapped and create a data wrapping DrawTarget and, if the
// surface is not in main memory, then we will incure a readback. The latter
// of these two "wrong choices" is the least costly (a readback, vs an
// upload and a readback), and more than likely the DATA surface that we've
// been passed actually IS in main memory anyway. For these reasons it's most
// likely best to create a data wrapping DrawTarget here to do the format
// conversion.
RefPtr<DataSourceSurface> dataSurface =
Factory::CreateDataSourceSurface(aSurface->GetSize(), aFormat);
DataSourceSurface::MappedSurface map;
if (!dataSurface ||
!dataSurface->Map(DataSourceSurface::MapType::READ_WRITE, &map)) {
return nullptr;
}
RefPtr<DrawTarget> dt = Factory::CreateDrawTargetForData(
BackendType::CAIRO, map.mData, dataSurface->GetSize(), map.mStride,
aFormat);
if (!dt) {
dataSurface->Unmap();
return nullptr;
}
// Using DrawSurface() here rather than CopySurface() because CopySurface
// is optimized for memcpy and therefore isn't good for format conversion.
// Using OP_OVER since in our case it's equivalent to OP_SOURCE and
// generally more optimized.
dt->DrawSurface(aSurface, bounds, bounds, DrawSurfaceOptions(),
DrawOptions(1.0f, CompositionOp::OP_OVER));
dataSurface->Unmap();
return dataSurface.forget();
}
const uint32_t gfxUtils::sNumFrameColors = 8;
/* static */ const gfx::Color& gfxUtils::GetColorForFrameNumber(
uint64_t aFrameNumber) {
static bool initialized = false;
static gfx::Color colors[sNumFrameColors];
if (!initialized) {
uint32_t i = 0;
colors[i++] = gfx::Color::FromABGR(0xffff0000);
colors[i++] = gfx::Color::FromABGR(0xffcc00ff);
colors[i++] = gfx::Color::FromABGR(0xff0066cc);
colors[i++] = gfx::Color::FromABGR(0xff00ff00);
colors[i++] = gfx::Color::FromABGR(0xff33ffff);
colors[i++] = gfx::Color::FromABGR(0xffff0099);
colors[i++] = gfx::Color::FromABGR(0xff0000ff);
colors[i++] = gfx::Color::FromABGR(0xff999999);
MOZ_ASSERT(i == sNumFrameColors);
initialized = true;
}
return colors[aFrameNumber % sNumFrameColors];
}
/* static */ nsresult gfxUtils::EncodeSourceSurface(
SourceSurface* aSurface, const nsACString& aMimeType,
const nsAString& aOutputOptions, BinaryOrData aBinaryOrData, FILE* aFile,
nsACString* aStrOut) {
MOZ_ASSERT(aBinaryOrData == gfxUtils::eDataURIEncode || aFile || aStrOut,
"Copying binary encoding to clipboard not currently supported");
const IntSize size = aSurface->GetSize();
if (size.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
const Size floatSize(size.width, size.height);
RefPtr<DataSourceSurface> dataSurface;
if (aSurface->GetFormat() != SurfaceFormat::B8G8R8A8) {
// FIXME bug 995807 (B8G8R8X8), bug 831898 (R5G6B5)
dataSurface = gfxUtils::CopySurfaceToDataSourceSurfaceWithFormat(
aSurface, SurfaceFormat::B8G8R8A8);
} else {
dataSurface = aSurface->GetDataSurface();
}
if (!dataSurface) {
return NS_ERROR_FAILURE;
}
DataSourceSurface::MappedSurface map;
if (!dataSurface->Map(DataSourceSurface::MapType::READ, &map)) {
return NS_ERROR_FAILURE;
}
nsAutoCString encoderCID(
NS_LITERAL_CSTRING("@mozilla.org/image/encoder;2?type=") + aMimeType);
nsCOMPtr<imgIEncoder> encoder = do_CreateInstance(encoderCID.get());
if (!encoder) {
#ifdef DEBUG
int32_t w = std::min(size.width, 8);
int32_t h = std::min(size.height, 8);
printf("Could not create encoder. Top-left %dx%d pixels contain:\n", w, h);
for (int32_t y = 0; y < h; ++y) {
for (int32_t x = 0; x < w; ++x) {
printf("%x ",
reinterpret_cast<uint32_t*>(map.mData)[y * map.mStride + x]);
}
}
#endif
dataSurface->Unmap();
return NS_ERROR_FAILURE;
}
nsresult rv = encoder->InitFromData(
map.mData, BufferSizeFromStrideAndHeight(map.mStride, size.height),
size.width, size.height, map.mStride, imgIEncoder::INPUT_FORMAT_HOSTARGB,
aOutputOptions);
dataSurface->Unmap();
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIInputStream> imgStream(encoder);
if (!imgStream) {
return NS_ERROR_FAILURE;
}
uint64_t bufSize64;
rv = imgStream->Available(&bufSize64);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(bufSize64 < UINT32_MAX - 16, NS_ERROR_FAILURE);
uint32_t bufSize = (uint32_t)bufSize64;
// ...leave a little extra room so we can call read again and make sure we
// got everything. 16 bytes for better padding (maybe)
bufSize += 16;
uint32_t imgSize = 0;
Vector<char> imgData;
if (!imgData.initCapacity(bufSize)) {
return NS_ERROR_OUT_OF_MEMORY;
}
uint32_t numReadThisTime = 0;
while ((rv = imgStream->Read(imgData.begin() + imgSize, bufSize - imgSize,
&numReadThisTime)) == NS_OK &&
numReadThisTime > 0) {
// Update the length of the vector without overwriting the new data.
if (!imgData.growByUninitialized(numReadThisTime)) {
return NS_ERROR_OUT_OF_MEMORY;
}
imgSize += numReadThisTime;
if (imgSize == bufSize) {
// need a bigger buffer, just double
bufSize *= 2;
if (!imgData.resizeUninitialized(bufSize)) {
return NS_ERROR_OUT_OF_MEMORY;
}
}
}
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(!imgData.empty(), NS_ERROR_FAILURE);
if (aBinaryOrData == gfxUtils::eBinaryEncode) {
if (aFile) {
Unused << fwrite(imgData.begin(), 1, imgSize, aFile);
}
return NS_OK;