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1 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 : * vim: set ts=2 sw=2 et tw=78:
3 : * This Source Code Form is subject to the terms of the Mozilla Public
4 : * License, v. 2.0. If a copy of the MPL was not distributed with this
5 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
6 : */
7 :
8 : /*
9 : * structures that represent things to be painted (ordered in z-order),
10 : * used during painting and hit testing
11 : */
12 :
13 : #include "nsDisplayList.h"
14 :
15 : #include <stdint.h>
16 : #include <algorithm>
17 : #include <limits>
18 :
19 : #include "gfxContext.h"
20 : #include "gfxUtils.h"
21 : #include "mozilla/dom/TabChild.h"
22 : #include "mozilla/dom/KeyframeEffectReadOnly.h"
23 : #include "mozilla/gfx/2D.h"
24 : #include "mozilla/layers/PLayerTransaction.h"
25 : #include "nsCSSRendering.h"
26 : #include "nsISelectionController.h"
27 : #include "nsIPresShell.h"
28 : #include "nsRegion.h"
29 : #include "nsStyleStructInlines.h"
30 : #include "nsStyleTransformMatrix.h"
31 : #include "gfxMatrix.h"
32 : #include "gfxPrefs.h"
33 : #include "nsSVGIntegrationUtils.h"
34 : #include "nsSVGUtils.h"
35 : #include "nsLayoutUtils.h"
36 : #include "nsIScrollableFrame.h"
37 : #include "nsIFrameInlines.h"
38 : #include "nsThemeConstants.h"
39 : #include "BorderConsts.h"
40 : #include "LayerTreeInvalidation.h"
41 :
42 : #include "imgIContainer.h"
43 : #include "BasicLayers.h"
44 : #include "nsBoxFrame.h"
45 : #include "nsSubDocumentFrame.h"
46 : #include "nsSVGEffects.h"
47 : #include "nsSVGElement.h"
48 : #include "nsSVGClipPathFrame.h"
49 : #include "GeckoProfiler.h"
50 : #include "nsViewManager.h"
51 : #include "ImageLayers.h"
52 : #include "ImageContainer.h"
53 : #include "nsCanvasFrame.h"
54 : #include "StickyScrollContainer.h"
55 : #include "mozilla/AnimationPerformanceWarning.h"
56 : #include "mozilla/AnimationUtils.h"
57 : #include "mozilla/EffectCompositor.h"
58 : #include "mozilla/EffectSet.h"
59 : #include "mozilla/EventStates.h"
60 : #include "mozilla/LookAndFeel.h"
61 : #include "mozilla/OperatorNewExtensions.h"
62 : #include "mozilla/PendingAnimationTracker.h"
63 : #include "mozilla/Preferences.h"
64 : #include "mozilla/StyleAnimationValue.h"
65 : #include "mozilla/ServoBindings.h"
66 : #include "mozilla/Telemetry.h"
67 : #include "mozilla/UniquePtr.h"
68 : #include "mozilla/Unused.h"
69 : #include "mozilla/ViewportFrame.h"
70 : #include "mozilla/gfx/gfxVars.h"
71 : #include "ActiveLayerTracker.h"
72 : #include "nsContentUtils.h"
73 : #include "nsPrintfCString.h"
74 : #include "UnitTransforms.h"
75 : #include "LayersLogging.h"
76 : #include "FrameLayerBuilder.h"
77 : #include "mozilla/EventStateManager.h"
78 : #include "mozilla/GeckoRestyleManager.h"
79 : #include "nsCaret.h"
80 : #include "nsISelection.h"
81 : #include "nsDOMTokenList.h"
82 : #include "mozilla/RuleNodeCacheConditions.h"
83 : #include "nsCSSProps.h"
84 : #include "nsPluginFrame.h"
85 : #include "nsSVGMaskFrame.h"
86 : #include "nsTableCellFrame.h"
87 : #include "nsTableColFrame.h"
88 : #include "ClientLayerManager.h"
89 : #include "mozilla/layers/StackingContextHelper.h"
90 : #include "mozilla/layers/WebRenderBridgeChild.h"
91 : #include "mozilla/layers/WebRenderLayerManager.h"
92 : #include "mozilla/layers/WebRenderDisplayItemLayer.h"
93 : #include "mozilla/layers/WebRenderMessages.h"
94 : #include "mozilla/layers/WebRenderDisplayItemLayer.h"
95 :
96 : // GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
97 : // GetTickCount().
98 : #ifdef GetCurrentTime
99 : #undef GetCurrentTime
100 : #endif
101 :
102 : using namespace mozilla;
103 : using namespace mozilla::layers;
104 : using namespace mozilla::dom;
105 : using namespace mozilla::layout;
106 : using namespace mozilla::gfx;
107 :
108 : typedef FrameMetrics::ViewID ViewID;
109 : typedef nsStyleTransformMatrix::TransformReferenceBox TransformReferenceBox;
110 :
111 : #ifdef DEBUG
112 : static bool
113 0 : SpammyLayoutWarningsEnabled()
114 : {
115 : static bool sValue = false;
116 : static bool sValueInitialized = false;
117 :
118 0 : if (!sValueInitialized) {
119 0 : Preferences::GetBool("layout.spammy_warnings.enabled", &sValue);
120 0 : sValueInitialized = true;
121 : }
122 :
123 0 : return sValue;
124 : }
125 : #endif
126 :
127 : void*
128 2 : AnimatedGeometryRoot::operator new(size_t aSize, nsDisplayListBuilder* aBuilder)
129 : {
130 2 : return aBuilder->Allocate(aSize);
131 : }
132 :
133 : /* static */ bool
134 10249 : ActiveScrolledRoot::IsAncestor(const ActiveScrolledRoot* aAncestor,
135 : const ActiveScrolledRoot* aDescendant)
136 : {
137 10249 : if (!aAncestor) {
138 : // nullptr is the root
139 10225 : return true;
140 : }
141 24 : if (Depth(aAncestor) > Depth(aDescendant)) {
142 13 : return false;
143 : }
144 11 : const ActiveScrolledRoot* asr = aDescendant;
145 11 : while (asr) {
146 11 : if (asr == aAncestor) {
147 11 : return true;
148 : }
149 0 : asr = asr->mParent;
150 : }
151 0 : return false;
152 : }
153 :
154 : /* static */ nsCString
155 0 : ActiveScrolledRoot::ToString(const ActiveScrolledRoot* aActiveScrolledRoot)
156 : {
157 0 : nsAutoCString str;
158 0 : for (auto* asr = aActiveScrolledRoot; asr; asr = asr->mParent) {
159 0 : str.AppendPrintf("<0x%p>", asr->mScrollableFrame);
160 0 : if (asr->mParent) {
161 0 : str.Append(", ");
162 : }
163 : }
164 0 : return str;
165 : }
166 :
167 : static inline CSSAngle
168 0 : MakeCSSAngle(const nsCSSValue& aValue)
169 : {
170 0 : return CSSAngle(aValue.GetAngleValue(), aValue.GetUnit());
171 : }
172 :
173 0 : static void AddTransformFunctions(const nsCSSValueList* aList,
174 : nsStyleContext* aContext,
175 : nsPresContext* aPresContext,
176 : TransformReferenceBox& aRefBox,
177 : InfallibleTArray<TransformFunction>& aFunctions)
178 : {
179 0 : if (aList->mValue.GetUnit() == eCSSUnit_None) {
180 0 : return;
181 : }
182 :
183 0 : for (const nsCSSValueList* curr = aList; curr; curr = curr->mNext) {
184 0 : const nsCSSValue& currElem = curr->mValue;
185 0 : NS_ASSERTION(currElem.GetUnit() == eCSSUnit_Function,
186 : "Stream should consist solely of functions!");
187 0 : nsCSSValue::Array* array = currElem.GetArrayValue();
188 0 : RuleNodeCacheConditions conditions;
189 0 : switch (nsStyleTransformMatrix::TransformFunctionOf(array)) {
190 : case eCSSKeyword_rotatex:
191 : {
192 0 : CSSAngle theta = MakeCSSAngle(array->Item(1));
193 0 : aFunctions.AppendElement(RotationX(theta));
194 0 : break;
195 : }
196 : case eCSSKeyword_rotatey:
197 : {
198 0 : CSSAngle theta = MakeCSSAngle(array->Item(1));
199 0 : aFunctions.AppendElement(RotationY(theta));
200 0 : break;
201 : }
202 : case eCSSKeyword_rotatez:
203 : {
204 0 : CSSAngle theta = MakeCSSAngle(array->Item(1));
205 0 : aFunctions.AppendElement(RotationZ(theta));
206 0 : break;
207 : }
208 : case eCSSKeyword_rotate:
209 : {
210 0 : CSSAngle theta = MakeCSSAngle(array->Item(1));
211 0 : aFunctions.AppendElement(Rotation(theta));
212 0 : break;
213 : }
214 : case eCSSKeyword_rotate3d:
215 : {
216 0 : double x = array->Item(1).GetFloatValue();
217 0 : double y = array->Item(2).GetFloatValue();
218 0 : double z = array->Item(3).GetFloatValue();
219 0 : CSSAngle theta = MakeCSSAngle(array->Item(4));
220 0 : aFunctions.AppendElement(Rotation3D(x, y, z, theta));
221 0 : break;
222 : }
223 : case eCSSKeyword_scalex:
224 : {
225 0 : double x = array->Item(1).GetFloatValue();
226 0 : aFunctions.AppendElement(Scale(x, 1, 1));
227 0 : break;
228 : }
229 : case eCSSKeyword_scaley:
230 : {
231 0 : double y = array->Item(1).GetFloatValue();
232 0 : aFunctions.AppendElement(Scale(1, y, 1));
233 0 : break;
234 : }
235 : case eCSSKeyword_scalez:
236 : {
237 0 : double z = array->Item(1).GetFloatValue();
238 0 : aFunctions.AppendElement(Scale(1, 1, z));
239 0 : break;
240 : }
241 : case eCSSKeyword_scale:
242 : {
243 0 : double x = array->Item(1).GetFloatValue();
244 : // scale(x) is shorthand for scale(x, x);
245 0 : double y = array->Count() == 2 ? x : array->Item(2).GetFloatValue();
246 0 : aFunctions.AppendElement(Scale(x, y, 1));
247 0 : break;
248 : }
249 : case eCSSKeyword_scale3d:
250 : {
251 0 : double x = array->Item(1).GetFloatValue();
252 0 : double y = array->Item(2).GetFloatValue();
253 0 : double z = array->Item(3).GetFloatValue();
254 0 : aFunctions.AppendElement(Scale(x, y, z));
255 0 : break;
256 : }
257 : case eCSSKeyword_translatex:
258 : {
259 0 : double x = nsStyleTransformMatrix::ProcessTranslatePart(
260 0 : array->Item(1), aContext, aPresContext, conditions,
261 0 : &aRefBox, &TransformReferenceBox::Width);
262 0 : aFunctions.AppendElement(Translation(x, 0, 0));
263 0 : break;
264 : }
265 : case eCSSKeyword_translatey:
266 : {
267 0 : double y = nsStyleTransformMatrix::ProcessTranslatePart(
268 0 : array->Item(1), aContext, aPresContext, conditions,
269 0 : &aRefBox, &TransformReferenceBox::Height);
270 0 : aFunctions.AppendElement(Translation(0, y, 0));
271 0 : break;
272 : }
273 : case eCSSKeyword_translatez:
274 : {
275 0 : double z = nsStyleTransformMatrix::ProcessTranslatePart(
276 0 : array->Item(1), aContext, aPresContext, conditions,
277 0 : nullptr);
278 0 : aFunctions.AppendElement(Translation(0, 0, z));
279 0 : break;
280 : }
281 : case eCSSKeyword_translate:
282 : {
283 0 : double x = nsStyleTransformMatrix::ProcessTranslatePart(
284 0 : array->Item(1), aContext, aPresContext, conditions,
285 0 : &aRefBox, &TransformReferenceBox::Width);
286 : // translate(x) is shorthand for translate(x, 0)
287 0 : double y = 0;
288 0 : if (array->Count() == 3) {
289 0 : y = nsStyleTransformMatrix::ProcessTranslatePart(
290 0 : array->Item(2), aContext, aPresContext, conditions,
291 : &aRefBox, &TransformReferenceBox::Height);
292 : }
293 0 : aFunctions.AppendElement(Translation(x, y, 0));
294 0 : break;
295 : }
296 : case eCSSKeyword_translate3d:
297 : {
298 0 : double x = nsStyleTransformMatrix::ProcessTranslatePart(
299 0 : array->Item(1), aContext, aPresContext, conditions,
300 0 : &aRefBox, &TransformReferenceBox::Width);
301 0 : double y = nsStyleTransformMatrix::ProcessTranslatePart(
302 0 : array->Item(2), aContext, aPresContext, conditions,
303 0 : &aRefBox, &TransformReferenceBox::Height);
304 0 : double z = nsStyleTransformMatrix::ProcessTranslatePart(
305 0 : array->Item(3), aContext, aPresContext, conditions,
306 0 : nullptr);
307 :
308 0 : aFunctions.AppendElement(Translation(x, y, z));
309 0 : break;
310 : }
311 : case eCSSKeyword_skewx:
312 : {
313 0 : CSSAngle x = MakeCSSAngle(array->Item(1));
314 0 : aFunctions.AppendElement(SkewX(x));
315 0 : break;
316 : }
317 : case eCSSKeyword_skewy:
318 : {
319 0 : CSSAngle y = MakeCSSAngle(array->Item(1));
320 0 : aFunctions.AppendElement(SkewY(y));
321 0 : break;
322 : }
323 : case eCSSKeyword_skew:
324 : {
325 0 : CSSAngle x = MakeCSSAngle(array->Item(1));
326 : // skew(x) is shorthand for skew(x, 0)
327 0 : CSSAngle y(0.0f, eCSSUnit_Degree);
328 0 : if (array->Count() == 3) {
329 0 : y = MakeCSSAngle(array->Item(2));
330 : }
331 0 : aFunctions.AppendElement(Skew(x, y));
332 0 : break;
333 : }
334 : case eCSSKeyword_matrix:
335 : {
336 0 : gfx::Matrix4x4 matrix;
337 0 : matrix._11 = array->Item(1).GetFloatValue();
338 0 : matrix._12 = array->Item(2).GetFloatValue();
339 0 : matrix._13 = 0;
340 0 : matrix._14 = 0;
341 0 : matrix._21 = array->Item(3).GetFloatValue();
342 0 : matrix._22 = array->Item(4).GetFloatValue();
343 0 : matrix._23 = 0;
344 0 : matrix._24 = 0;
345 0 : matrix._31 = 0;
346 0 : matrix._32 = 0;
347 0 : matrix._33 = 1;
348 0 : matrix._34 = 0;
349 0 : matrix._41 = array->Item(5).GetFloatValue();
350 0 : matrix._42 = array->Item(6).GetFloatValue();
351 0 : matrix._43 = 0;
352 0 : matrix._44 = 1;
353 0 : aFunctions.AppendElement(TransformMatrix(matrix));
354 0 : break;
355 : }
356 : case eCSSKeyword_matrix3d:
357 : {
358 0 : gfx::Matrix4x4 matrix;
359 0 : matrix._11 = array->Item(1).GetFloatValue();
360 0 : matrix._12 = array->Item(2).GetFloatValue();
361 0 : matrix._13 = array->Item(3).GetFloatValue();
362 0 : matrix._14 = array->Item(4).GetFloatValue();
363 0 : matrix._21 = array->Item(5).GetFloatValue();
364 0 : matrix._22 = array->Item(6).GetFloatValue();
365 0 : matrix._23 = array->Item(7).GetFloatValue();
366 0 : matrix._24 = array->Item(8).GetFloatValue();
367 0 : matrix._31 = array->Item(9).GetFloatValue();
368 0 : matrix._32 = array->Item(10).GetFloatValue();
369 0 : matrix._33 = array->Item(11).GetFloatValue();
370 0 : matrix._34 = array->Item(12).GetFloatValue();
371 0 : matrix._41 = array->Item(13).GetFloatValue();
372 0 : matrix._42 = array->Item(14).GetFloatValue();
373 0 : matrix._43 = array->Item(15).GetFloatValue();
374 0 : matrix._44 = array->Item(16).GetFloatValue();
375 0 : aFunctions.AppendElement(TransformMatrix(matrix));
376 0 : break;
377 : }
378 : case eCSSKeyword_interpolatematrix:
379 : {
380 : bool dummy;
381 0 : Matrix4x4 matrix;
382 : nsStyleTransformMatrix::ProcessInterpolateMatrix(matrix, array,
383 : aContext,
384 : aPresContext,
385 : conditions,
386 : aRefBox,
387 0 : &dummy);
388 0 : aFunctions.AppendElement(TransformMatrix(matrix));
389 0 : break;
390 : }
391 : case eCSSKeyword_accumulatematrix:
392 : {
393 : bool dummy;
394 0 : Matrix4x4 matrix;
395 : nsStyleTransformMatrix::ProcessAccumulateMatrix(matrix, array,
396 : aContext,
397 : aPresContext,
398 : conditions,
399 : aRefBox,
400 0 : &dummy);
401 0 : aFunctions.AppendElement(TransformMatrix(matrix));
402 0 : break;
403 : }
404 : case eCSSKeyword_perspective:
405 : {
406 0 : aFunctions.AppendElement(Perspective(array->Item(1).GetFloatValue()));
407 0 : break;
408 : }
409 : default:
410 0 : NS_ERROR("Function not handled yet!");
411 : }
412 : }
413 : }
414 :
415 : static void
416 0 : AddTransformFunctions(const nsCSSValueSharedList* aList,
417 : const nsIFrame* aFrame,
418 : TransformReferenceBox& aRefBox,
419 : layers::Animatable& aAnimatable)
420 : {
421 0 : MOZ_ASSERT(aList->mHead);
422 0 : AddTransformFunctions(aList->mHead,
423 : aFrame->StyleContext(),
424 : aFrame->PresContext(),
425 : aRefBox,
426 0 : aAnimatable.get_ArrayOfTransformFunction());
427 0 : }
428 :
429 : static TimingFunction
430 0 : ToTimingFunction(const Maybe<ComputedTimingFunction>& aCTF)
431 : {
432 0 : if (aCTF.isNothing()) {
433 0 : return TimingFunction(null_t());
434 : }
435 :
436 0 : if (aCTF->HasSpline()) {
437 0 : const nsSMILKeySpline* spline = aCTF->GetFunction();
438 0 : return TimingFunction(CubicBezierFunction(spline->X1(), spline->Y1(),
439 0 : spline->X2(), spline->Y2()));
440 : }
441 :
442 0 : if (aCTF->GetType() == nsTimingFunction::Type::Frames) {
443 0 : return TimingFunction(FramesFunction(aCTF->GetFrames()));
444 : }
445 :
446 0 : uint32_t type = aCTF->GetType() == nsTimingFunction::Type::StepStart ? 1 : 2;
447 0 : return TimingFunction(StepFunction(aCTF->GetSteps(), type));
448 : }
449 :
450 : static void
451 0 : SetAnimatable(nsCSSPropertyID aProperty,
452 : const AnimationValue& aAnimationValue,
453 : nsIFrame* aFrame,
454 : TransformReferenceBox& aRefBox,
455 : layers::Animatable& aAnimatable)
456 : {
457 0 : MOZ_ASSERT(aFrame);
458 :
459 0 : if (aAnimationValue.IsNull()) {
460 0 : aAnimatable = null_t();
461 0 : return;
462 : }
463 :
464 0 : switch (aProperty) {
465 : case eCSSProperty_opacity:
466 0 : aAnimatable = aAnimationValue.GetOpacity();
467 0 : break;
468 : case eCSSProperty_transform: {
469 0 : aAnimatable = InfallibleTArray<TransformFunction>();
470 0 : if (aAnimationValue.mServo) {
471 0 : RefPtr<nsCSSValueSharedList> list;
472 0 : Servo_AnimationValue_GetTransform(aAnimationValue.mServo, &list);
473 0 : AddTransformFunctions(list, aFrame, aRefBox, aAnimatable);
474 : } else {
475 : nsCSSValueSharedList* list =
476 0 : aAnimationValue.mGecko.GetCSSValueSharedListValue();
477 0 : AddTransformFunctions(list, aFrame, aRefBox, aAnimatable);
478 : }
479 0 : break;
480 : }
481 : default:
482 0 : MOZ_ASSERT_UNREACHABLE("Unsupported property");
483 : }
484 : }
485 :
486 : static void
487 0 : AddAnimationForProperty(nsIFrame* aFrame, const AnimationProperty& aProperty,
488 : dom::Animation* aAnimation, Layer* aLayer,
489 : AnimationData& aData, bool aPending)
490 : {
491 0 : MOZ_ASSERT(aLayer->AsContainerLayer(), "Should only animate ContainerLayer");
492 0 : MOZ_ASSERT(aAnimation->GetEffect(),
493 : "Should not be adding an animation without an effect");
494 0 : MOZ_ASSERT(!aAnimation->GetCurrentOrPendingStartTime().IsNull() ||
495 : !aAnimation->IsPlaying() ||
496 : (aAnimation->GetTimeline() &&
497 : aAnimation->GetTimeline()->TracksWallclockTime()),
498 : "If the animation has an unresolved start time it should either"
499 : " be static (so we don't need a start time) or else have a"
500 : " timeline capable of converting TimeStamps (so we can calculate"
501 : " one later");
502 :
503 : layers::Animation* animation =
504 0 : aPending ?
505 : aLayer->AddAnimationForNextTransaction() :
506 0 : aLayer->AddAnimation();
507 :
508 0 : const TimingParams& timing = aAnimation->GetEffect()->SpecifiedTiming();
509 :
510 : // If we are starting a new transition that replaces an existing transition
511 : // running on the compositor, it is possible that the animation on the
512 : // compositor will have advanced ahead of the main thread. If we use as
513 : // the starting point of the new transition, the current value of the
514 : // replaced transition as calculated on the main thread using the refresh
515 : // driver time, the new transition will jump when it starts. Instead, we
516 : // re-calculate the starting point of the new transition by applying the
517 : // current TimeStamp to the parameters of the replaced transition.
518 : //
519 : // We need to do this here, rather than when we generate the new transition,
520 : // since after generating the new transition other requestAnimationFrame
521 : // callbacks may run that introduce further lag between the main thread and
522 : // the compositor.
523 0 : if (aAnimation->AsCSSTransition() &&
524 0 : aAnimation->GetEffect() &&
525 0 : aAnimation->GetEffect()->AsTransition()) {
526 : // We update startValue from the replaced transition only if the effect is
527 : // an ElementPropertyTransition.
528 0 : aAnimation->GetEffect()->AsTransition()->
529 0 : UpdateStartValueFromReplacedTransition();
530 : }
531 :
532 0 : animation->originTime() = !aAnimation->GetTimeline()
533 0 : ? TimeStamp()
534 0 : : aAnimation->GetTimeline()->
535 0 : ToTimeStamp(TimeDuration());
536 :
537 0 : Nullable<TimeDuration> startTime = aAnimation->GetCurrentOrPendingStartTime();
538 0 : if (startTime.IsNull()) {
539 0 : animation->startTime() = null_t();
540 : } else {
541 0 : animation->startTime() = startTime.Value();
542 : }
543 :
544 0 : animation->holdTime() = aAnimation->GetCurrentTime().Value();
545 :
546 : const ComputedTiming computedTiming =
547 0 : aAnimation->GetEffect()->GetComputedTiming();
548 0 : animation->delay() = timing.Delay();
549 0 : animation->endDelay() = timing.EndDelay();
550 0 : animation->duration() = computedTiming.mDuration;
551 0 : animation->iterations() = computedTiming.mIterations;
552 0 : animation->iterationStart() = computedTiming.mIterationStart;
553 0 : animation->direction() = static_cast<uint8_t>(timing.Direction());
554 0 : animation->fillMode() = static_cast<uint8_t>(computedTiming.mFill);
555 0 : animation->property() = aProperty.mProperty;
556 0 : animation->playbackRate() = aAnimation->PlaybackRate();
557 0 : animation->data() = aData;
558 0 : animation->easingFunction() = ToTimingFunction(timing.TimingFunction());
559 0 : animation->iterationComposite() =
560 0 : static_cast<uint8_t>(aAnimation->GetEffect()->
561 0 : AsKeyframeEffect()->IterationComposite());
562 0 : animation->isNotPlaying() = !aAnimation->IsPlaying();
563 :
564 0 : TransformReferenceBox refBox(aFrame);
565 :
566 : // If the animation is additive or accumulates, we need to pass its base value
567 : // to the compositor.
568 :
569 : AnimationValue baseStyle =
570 0 : aAnimation->GetEffect()->AsKeyframeEffect()->BaseStyle(aProperty.mProperty);
571 0 : if (!baseStyle.IsNull()) {
572 0 : SetAnimatable(aProperty.mProperty,
573 : baseStyle,
574 : aFrame, refBox,
575 0 : animation->baseStyle());
576 : } else {
577 0 : animation->baseStyle() = null_t();
578 : }
579 :
580 0 : for (uint32_t segIdx = 0; segIdx < aProperty.mSegments.Length(); segIdx++) {
581 0 : const AnimationPropertySegment& segment = aProperty.mSegments[segIdx];
582 :
583 0 : AnimationSegment* animSegment = animation->segments().AppendElement();
584 0 : SetAnimatable(aProperty.mProperty,
585 : segment.mFromValue,
586 : aFrame, refBox,
587 0 : animSegment->startState());
588 0 : SetAnimatable(aProperty.mProperty,
589 : segment.mToValue,
590 : aFrame, refBox,
591 0 : animSegment->endState());
592 :
593 0 : animSegment->startPortion() = segment.mFromKey;
594 0 : animSegment->endPortion() = segment.mToKey;
595 0 : animSegment->startComposite() =
596 0 : static_cast<uint8_t>(segment.mFromComposite);
597 0 : animSegment->endComposite() =
598 0 : static_cast<uint8_t>(segment.mToComposite);
599 0 : animSegment->sampleFn() = ToTimingFunction(segment.mTimingFunction);
600 : }
601 0 : }
602 :
603 : static void
604 0 : AddAnimationsForProperty(nsIFrame* aFrame, nsCSSPropertyID aProperty,
605 : nsTArray<RefPtr<dom::Animation>>& aAnimations,
606 : Layer* aLayer, AnimationData& aData,
607 : bool aPending)
608 : {
609 0 : MOZ_ASSERT(nsCSSProps::PropHasFlags(aProperty,
610 : CSS_PROPERTY_CAN_ANIMATE_ON_COMPOSITOR),
611 : "inconsistent property flags");
612 :
613 0 : EffectSet* effects = EffectSet::GetEffectSet(aFrame);
614 0 : MOZ_ASSERT(effects);
615 :
616 0 : bool sentAnimations = false;
617 : // Add from first to last (since last overrides)
618 0 : for (size_t animIdx = 0; animIdx < aAnimations.Length(); animIdx++) {
619 0 : dom::Animation* anim = aAnimations[animIdx];
620 0 : if (!anim->IsRelevant()) {
621 0 : continue;
622 : }
623 :
624 : dom::KeyframeEffectReadOnly* keyframeEffect =
625 0 : anim->GetEffect() ? anim->GetEffect()->AsKeyframeEffect() : nullptr;
626 0 : MOZ_ASSERT(keyframeEffect,
627 : "A playing animation should have a keyframe effect");
628 : const AnimationProperty* property =
629 0 : keyframeEffect->GetEffectiveAnimationOfProperty(aProperty);
630 0 : if (!property) {
631 0 : continue;
632 : }
633 :
634 : // Note that if the property is overridden by !important rules,
635 : // GetEffectiveAnimationOfProperty returns null instead.
636 : // This is what we want, since if we have animations overridden by
637 : // !important rules, we don't want to send them to the compositor.
638 0 : MOZ_ASSERT(anim->CascadeLevel() !=
639 : EffectCompositor::CascadeLevel::Animations ||
640 : !effects->PropertiesWithImportantRules()
641 : .HasProperty(aProperty),
642 : "GetEffectiveAnimationOfProperty already tested the property "
643 : "is not overridden by !important rules");
644 :
645 : // Don't add animations that are pending if their timeline does not
646 : // track wallclock time. This is because any pending animations on layers
647 : // will have their start time updated with the current wallclock time.
648 : // If we can't convert that wallclock time back to an equivalent timeline
649 : // time, we won't be able to update the content animation and it will end
650 : // up being out of sync with the layer animation.
651 : //
652 : // Currently this only happens when the timeline is driven by a refresh
653 : // driver under test control. In this case, the next time the refresh
654 : // driver is advanced it will trigger any pending animations.
655 0 : if (anim->PlayState() == AnimationPlayState::Pending &&
656 0 : (anim->GetTimeline() &&
657 0 : !anim->GetTimeline()->TracksWallclockTime())) {
658 0 : continue;
659 : }
660 :
661 0 : AddAnimationForProperty(aFrame, *property, anim, aLayer, aData, aPending);
662 0 : keyframeEffect->SetIsRunningOnCompositor(aProperty, true);
663 0 : sentAnimations = true;
664 : }
665 :
666 0 : if (sentAnimations && aProperty == eCSSProperty_transform) {
667 0 : TimeStamp now = aFrame->PresContext()->RefreshDriver()->MostRecentRefresh();
668 0 : effects->UpdateLastTransformSyncTime(now);
669 : }
670 0 : }
671 :
672 : static bool
673 0 : GenerateAndPushTextMask(nsIFrame* aFrame, gfxContext* aContext,
674 : const nsRect& aFillRect, nsDisplayListBuilder* aBuilder)
675 : {
676 0 : if (aBuilder->IsForGenerateGlyphMask() ||
677 0 : aBuilder->IsForPaintingSelectionBG()) {
678 0 : return false;
679 : }
680 :
681 : // The main function of enabling background-clip:text property value.
682 : // When a nsDisplayBackgroundImage detects "text" bg-clip style, it will call
683 : // this function to
684 : // 1. Paint background color of the selection text if any.
685 : // 2. Generate a mask by all descendant text frames
686 : // 3. Push the generated mask into aContext.
687 : //
688 : // TBD: we actually generate display list of aFrame twice here. It's better
689 : // to reuse the same display list and paint that one twice, one for selection
690 : // background, one for generating text mask.
691 :
692 0 : gfxContext* sourceCtx = aContext;
693 : gfxRect bounds =
694 : nsLayoutUtils::RectToGfxRect(aFillRect,
695 0 : aFrame->PresContext()->AppUnitsPerDevPixel());
696 :
697 : {
698 : // Paint text selection background into sourceCtx.
699 0 : gfxContextMatrixAutoSaveRestore save(sourceCtx);
700 0 : sourceCtx->SetMatrix(sourceCtx->CurrentMatrix().PreTranslate(bounds.TopLeft()));
701 :
702 0 : nsLayoutUtils::PaintFrame(aContext, aFrame,
703 0 : nsRect(nsPoint(0, 0), aFrame->GetSize()),
704 : NS_RGB(255, 255, 255),
705 0 : nsDisplayListBuilderMode::PAINTING_SELECTION_BACKGROUND);
706 : }
707 :
708 : // Evaluate required surface size.
709 0 : IntRect drawRect;
710 : {
711 0 : gfxContextMatrixAutoSaveRestore matRestore(sourceCtx);
712 :
713 0 : sourceCtx->SetMatrix(gfxMatrix());
714 0 : gfxRect clipRect = sourceCtx->GetClipExtents();
715 0 : drawRect = RoundedOut(ToRect(clipRect));
716 : }
717 :
718 : // Create a mask surface.
719 0 : RefPtr<DrawTarget> sourceTarget = sourceCtx->GetDrawTarget();
720 : RefPtr<DrawTarget> maskDT =
721 0 : sourceTarget->CreateSimilarDrawTarget(drawRect.Size(),
722 0 : SurfaceFormat::A8);
723 0 : if (!maskDT || !maskDT->IsValid()) {
724 0 : return false;
725 : }
726 0 : RefPtr<gfxContext> maskCtx = gfxContext::CreatePreservingTransformOrNull(maskDT);
727 0 : MOZ_ASSERT(maskCtx);
728 0 : gfxMatrix currentMatrix = sourceCtx->CurrentMatrix();
729 0 : maskCtx->SetMatrix(gfxMatrix::Translation(bounds.TopLeft()) *
730 0 : currentMatrix *
731 0 : gfxMatrix::Translation(-drawRect.TopLeft()));
732 :
733 : // Shade text shape into mask A8 surface.
734 0 : nsLayoutUtils::PaintFrame(maskCtx, aFrame,
735 0 : nsRect(nsPoint(0, 0), aFrame->GetSize()),
736 : NS_RGB(255, 255, 255),
737 0 : nsDisplayListBuilderMode::GENERATE_GLYPH);
738 :
739 : // Push the generated mask into aContext, so that the caller can pop and
740 : // blend with it.
741 0 : Matrix maskTransform = ToMatrix(currentMatrix) *
742 0 : Matrix::Translation(-drawRect.x, -drawRect.y);
743 0 : maskTransform.Invert();
744 :
745 0 : RefPtr<SourceSurface> maskSurface = maskDT->Snapshot();
746 0 : sourceCtx->PushGroupForBlendBack(gfxContentType::COLOR_ALPHA, 1.0, maskSurface, maskTransform);
747 :
748 0 : return true;
749 : }
750 :
751 : /* static */ void
752 160 : nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(Layer* aLayer,
753 : nsDisplayListBuilder* aBuilder,
754 : nsDisplayItem* aItem,
755 : nsIFrame* aFrame,
756 : nsCSSPropertyID aProperty)
757 : {
758 160 : MOZ_ASSERT(nsCSSProps::PropHasFlags(aProperty,
759 : CSS_PROPERTY_CAN_ANIMATE_ON_COMPOSITOR),
760 : "inconsistent property flags");
761 :
762 : // This function can be called in two ways: from
763 : // nsDisplay*::BuildLayer while constructing a layer (with all
764 : // pointers non-null), or from RestyleManager's handling of
765 : // UpdateOpacityLayer/UpdateTransformLayer hints.
766 160 : MOZ_ASSERT(!aBuilder == !aItem,
767 : "should only be called in two configurations, with both "
768 : "aBuilder and aItem, or with neither");
769 160 : MOZ_ASSERT(!aItem || aFrame == aItem->Frame(), "frame mismatch");
770 :
771 : // Only send animations to a layer that is actually using
772 : // off-main-thread compositing.
773 160 : LayersBackend backend = aLayer->Manager()->GetBackendType();
774 160 : if (!(backend == layers::LayersBackend::LAYERS_CLIENT ||
775 : backend == layers::LayersBackend::LAYERS_WR)) {
776 320 : return;
777 : }
778 :
779 0 : bool pending = !aBuilder;
780 :
781 0 : if (pending) {
782 0 : aLayer->ClearAnimationsForNextTransaction();
783 : } else {
784 0 : aLayer->ClearAnimations();
785 : }
786 :
787 : // Update the animation generation on the layer. We need to do this before
788 : // any early returns since even if we don't add any animations to the
789 : // layer, we still need to mark it as up-to-date with regards to animations.
790 : // Otherwise, in RestyleManager we'll notice the discrepancy between the
791 : // animation generation numbers and update the layer indefinitely.
792 : uint64_t animationGeneration =
793 0 : RestyleManager::GetAnimationGenerationForFrame(aFrame);
794 0 : aLayer->SetAnimationGeneration(animationGeneration);
795 :
796 0 : EffectCompositor::ClearIsRunningOnCompositor(aFrame, aProperty);
797 : nsTArray<RefPtr<dom::Animation>> compositorAnimations =
798 0 : EffectCompositor::GetAnimationsForCompositor(aFrame, aProperty);
799 0 : if (compositorAnimations.IsEmpty()) {
800 0 : return;
801 : }
802 :
803 : // If the frame is not prerendered, bail out.
804 : // Do this check only during layer construction; during updating the
805 : // caller is required to check it appropriately.
806 0 : if (aItem && !aItem->CanUseAsyncAnimations(aBuilder)) {
807 : // EffectCompositor needs to know that we refused to run this animation
808 : // asynchronously so that it will not throttle the main thread
809 : // animation.
810 0 : aFrame->SetProperty(nsIFrame::RefusedAsyncAnimationProperty(), true);
811 :
812 : // We need to schedule another refresh driver run so that EffectCompositor
813 : // gets a chance to unthrottle the animation.
814 0 : aFrame->SchedulePaint();
815 0 : return;
816 : }
817 :
818 0 : AnimationData data;
819 0 : if (aProperty == eCSSProperty_transform) {
820 : // XXX Performance here isn't ideal for SVG. We'd prefer to avoid resolving
821 : // the dimensions of refBox. That said, we only get here if there are CSS
822 : // animations or transitions on this element, and that is likely to be a
823 : // lot rarer than transforms on SVG (the frequency of which drives the need
824 : // for TransformReferenceBox).
825 0 : TransformReferenceBox refBox(aFrame);
826 0 : nsRect bounds(0, 0, refBox.Width(), refBox.Height());
827 : // all data passed directly to the compositor should be in dev pixels
828 0 : int32_t devPixelsToAppUnits = aFrame->PresContext()->AppUnitsPerDevPixel();
829 0 : float scale = devPixelsToAppUnits;
830 : Point3D offsetToTransformOrigin =
831 0 : nsDisplayTransform::GetDeltaToTransformOrigin(aFrame, scale, &bounds);
832 0 : nsPoint origin;
833 0 : float scaleX = 1.0f;
834 0 : float scaleY = 1.0f;
835 0 : bool hasPerspectiveParent = false;
836 0 : if (aItem) {
837 : // This branch is for display items to leverage the cache of
838 : // nsDisplayListBuilder.
839 0 : origin = aItem->ToReferenceFrame();
840 : } else {
841 : // This branch is running for restyling.
842 : // Animations are animated at the coordination of the reference
843 : // frame outside, not the given frame itself. The given frame
844 : // is also reference frame too, so the parent's reference frame
845 : // are used.
846 : nsIFrame* referenceFrame =
847 0 : nsLayoutUtils::GetReferenceFrame(nsLayoutUtils::GetCrossDocParentFrame(aFrame));
848 0 : origin = aFrame->GetOffsetToCrossDoc(referenceFrame);
849 : }
850 :
851 0 : data = TransformData(origin, offsetToTransformOrigin,
852 : bounds, devPixelsToAppUnits,
853 0 : scaleX, scaleY, hasPerspectiveParent);
854 0 : } else if (aProperty == eCSSProperty_opacity) {
855 0 : data = null_t();
856 : }
857 :
858 0 : AddAnimationsForProperty(aFrame, aProperty, compositorAnimations,
859 0 : aLayer, data, pending);
860 : }
861 :
862 : void
863 0 : nsDisplayListBuilder::AutoCurrentActiveScrolledRootSetter::InsertScrollFrame(nsIScrollableFrame* aScrollableFrame)
864 : {
865 0 : MOZ_ASSERT(!mUsed);
866 0 : size_t descendantsEndIndex = mBuilder->mActiveScrolledRoots.Length();
867 0 : const ActiveScrolledRoot* parentASR = mBuilder->mCurrentActiveScrolledRoot;
868 0 : const ActiveScrolledRoot* asr = mBuilder->AllocateActiveScrolledRoot(parentASR, aScrollableFrame);
869 0 : mBuilder->mCurrentActiveScrolledRoot = asr;
870 :
871 : // All child ASRs of parentASR that were created while this
872 : // AutoCurrentActiveScrolledRootSetter object was on the stack belong to us
873 : // now. Reparent them to asr.
874 0 : for (size_t i = mDescendantsStartIndex; i < descendantsEndIndex; i++) {
875 0 : ActiveScrolledRoot* descendantASR = mBuilder->mActiveScrolledRoots[i];
876 0 : if (ActiveScrolledRoot::IsAncestor(parentASR, descendantASR)) {
877 0 : descendantASR->IncrementDepth();
878 0 : if (descendantASR->mParent == parentASR) {
879 0 : descendantASR->mParent = asr;
880 : }
881 : }
882 : }
883 :
884 0 : mUsed = true;
885 0 : }
886 :
887 53 : nsDisplayListBuilder::nsDisplayListBuilder(nsIFrame* aReferenceFrame,
888 53 : nsDisplayListBuilderMode aMode, bool aBuildCaret)
889 : : mReferenceFrame(aReferenceFrame),
890 : mIgnoreScrollFrame(nullptr),
891 : mLayerEventRegions(nullptr),
892 : mCurrentTableItem(nullptr),
893 : mCurrentActiveScrolledRoot(nullptr),
894 : mCurrentContainerASR(nullptr),
895 : mCurrentFrame(aReferenceFrame),
896 : mCurrentReferenceFrame(aReferenceFrame),
897 53 : mCurrentAGR(&mRootAGR),
898 : mRootAGR(aReferenceFrame, nullptr),
899 : mUsedAGRBudget(0),
900 : mDirtyRect(-1,-1,-1,-1),
901 : mGlassDisplayItem(nullptr),
902 : mScrollInfoItemsForHoisting(nullptr),
903 : mActiveScrolledRootForRootScrollframe(nullptr),
904 : mMode(aMode),
905 : mCurrentScrollParentId(FrameMetrics::NULL_SCROLL_ID),
906 : mCurrentScrollbarTarget(FrameMetrics::NULL_SCROLL_ID),
907 : mCurrentScrollbarFlags(0),
908 : mPerspectiveItemIndex(0),
909 : mSVGEffectsBuildingDepth(0),
910 : mContainsBlendMode(false),
911 : mIsBuildingScrollbar(false),
912 : mCurrentScrollbarWillHaveLayer(false),
913 : mBuildCaret(aBuildCaret),
914 : mIgnoreSuppression(false),
915 : mIsAtRootOfPseudoStackingContext(false),
916 : mIncludeAllOutOfFlows(false),
917 : mDescendIntoSubdocuments(true),
918 : mSelectedFramesOnly(false),
919 : mAccurateVisibleRegions(false),
920 : mAllowMergingAndFlattening(true),
921 : mWillComputePluginGeometry(false),
922 : mInTransform(false),
923 : mIsInChromePresContext(false),
924 : mSyncDecodeImages(false),
925 : mIsPaintingToWindow(false),
926 : mIsCompositingCheap(false),
927 : mContainsPluginItem(false),
928 : mAncestorHasApzAwareEventHandler(false),
929 : mHaveScrollableDisplayPort(false),
930 : mWindowDraggingAllowed(false),
931 53 : mIsBuildingForPopup(nsLayoutUtils::IsPopup(aReferenceFrame)),
932 : mForceLayerForScrollParent(false),
933 53 : mAsyncPanZoomEnabled(nsLayoutUtils::AsyncPanZoomEnabled(aReferenceFrame)),
934 : mBuildingInvisibleItems(false),
935 212 : mHitTestShouldStopAtFirstOpaque(false)
936 : {
937 53 : MOZ_COUNT_CTOR(nsDisplayListBuilder);
938 :
939 53 : nsPresContext* pc = aReferenceFrame->PresContext();
940 53 : nsIPresShell *shell = pc->PresShell();
941 53 : if (pc->IsRenderingOnlySelection()) {
942 0 : nsCOMPtr<nsISelectionController> selcon(do_QueryInterface(shell));
943 0 : if (selcon) {
944 0 : selcon->GetSelection(nsISelectionController::SELECTION_NORMAL,
945 0 : getter_AddRefs(mBoundingSelection));
946 : }
947 : }
948 :
949 53 : mFrameToAnimatedGeometryRootMap.Put(aReferenceFrame, &mRootAGR);
950 :
951 53 : nsCSSRendering::BeginFrameTreesLocked();
952 : static_assert(nsDisplayItem::TYPE_MAX < (1 << nsDisplayItem::TYPE_BITS),
953 : "Check nsDisplayItem::TYPE_MAX should not overflow");
954 53 : }
955 :
956 85 : static void MarkFrameForDisplay(nsIFrame* aFrame, nsIFrame* aStopAtFrame) {
957 804 : for (nsIFrame* f = aFrame; f;
958 : f = nsLayoutUtils::GetParentOrPlaceholderFor(f)) {
959 804 : if (f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO)
960 61 : return;
961 743 : f->AddStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
962 743 : if (f == aStopAtFrame) {
963 : // we've reached a frame that we know will be painted, so we can stop.
964 24 : break;
965 : }
966 : }
967 : }
968 :
969 3157 : bool nsDisplayListBuilder::NeedToForceTransparentSurfaceForItem(nsDisplayItem* aItem)
970 : {
971 3157 : return aItem == mGlassDisplayItem || aItem->ClearsBackground();
972 : }
973 :
974 : AnimatedGeometryRoot*
975 87 : nsDisplayListBuilder::WrapAGRForFrame(nsIFrame* aAnimatedGeometryRoot,
976 : AnimatedGeometryRoot* aParent /* = nullptr */)
977 : {
978 87 : MOZ_ASSERT(IsAnimatedGeometryRoot(aAnimatedGeometryRoot) == AGR_YES);
979 :
980 87 : AnimatedGeometryRoot* result = nullptr;
981 87 : if (!mFrameToAnimatedGeometryRootMap.Get(aAnimatedGeometryRoot, &result)) {
982 2 : MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(RootReferenceFrame(), aAnimatedGeometryRoot));
983 2 : AnimatedGeometryRoot* parent = aParent;
984 2 : if (!parent) {
985 0 : nsIFrame* parentFrame = nsLayoutUtils::GetCrossDocParentFrame(aAnimatedGeometryRoot);
986 0 : if (parentFrame) {
987 0 : nsIFrame* parentAGRFrame = FindAnimatedGeometryRootFrameFor(parentFrame);
988 0 : parent = WrapAGRForFrame(parentAGRFrame);
989 : }
990 : }
991 2 : result = new (this) AnimatedGeometryRoot(aAnimatedGeometryRoot, parent);
992 2 : mFrameToAnimatedGeometryRootMap.Put(aAnimatedGeometryRoot, result);
993 : }
994 87 : MOZ_ASSERT(!aParent || result->mParentAGR == aParent);
995 87 : return result;
996 : }
997 :
998 : AnimatedGeometryRoot*
999 0 : nsDisplayListBuilder::AnimatedGeometryRootForASR(const ActiveScrolledRoot* aASR)
1000 : {
1001 0 : if (!aASR) {
1002 0 : return GetRootAnimatedGeometryRoot();
1003 : }
1004 0 : nsIFrame* scrolledFrame = aASR->mScrollableFrame->GetScrolledFrame();
1005 0 : return FindAnimatedGeometryRootFor(scrolledFrame);
1006 : }
1007 :
1008 : AnimatedGeometryRoot*
1009 2674 : nsDisplayListBuilder::FindAnimatedGeometryRootFor(nsIFrame* aFrame)
1010 : {
1011 2674 : if (!IsPaintingToWindow()) {
1012 277 : return &mRootAGR;
1013 : }
1014 2397 : if (aFrame == mCurrentFrame) {
1015 2312 : return mCurrentAGR;
1016 : }
1017 85 : AnimatedGeometryRoot* result = nullptr;
1018 85 : if (mFrameToAnimatedGeometryRootMap.Get(aFrame, &result)) {
1019 0 : return result;
1020 : }
1021 :
1022 85 : nsIFrame* agrFrame = FindAnimatedGeometryRootFrameFor(aFrame);
1023 85 : result = WrapAGRForFrame(agrFrame);
1024 85 : mFrameToAnimatedGeometryRootMap.Put(aFrame, result);
1025 85 : return result;
1026 : }
1027 :
1028 : AnimatedGeometryRoot*
1029 0 : nsDisplayListBuilder::FindAnimatedGeometryRootFor(nsDisplayItem* aItem)
1030 : {
1031 0 : if (aItem->ShouldFixToViewport(this)) {
1032 : // Make its active scrolled root be the active scrolled root of
1033 : // the enclosing viewport, since it shouldn't be scrolled by scrolled
1034 : // frames in its document. InvalidateFixedBackgroundFramesFromList in
1035 : // nsGfxScrollFrame will not repaint this item when scrolling occurs.
1036 0 : nsIFrame* viewportFrame = nsLayoutUtils::GetClosestFrameOfType(
1037 0 : aItem->Frame(), LayoutFrameType::Viewport, RootReferenceFrame());
1038 0 : if (viewportFrame) {
1039 0 : return FindAnimatedGeometryRootFor(viewportFrame);
1040 : }
1041 : }
1042 0 : return FindAnimatedGeometryRootFor(aItem->Frame());
1043 : }
1044 :
1045 :
1046 112 : void nsDisplayListBuilder::MarkOutOfFlowFrameForDisplay(nsIFrame* aDirtyFrame,
1047 : nsIFrame* aFrame,
1048 : const nsRect& aDirtyRect)
1049 : {
1050 197 : nsRect dirtyRectRelativeToDirtyFrame = aDirtyRect;
1051 112 : if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame) &&
1052 0 : IsPaintingToWindow()) {
1053 0 : NS_ASSERTION(aDirtyFrame == aFrame->GetParent(), "Dirty frame should be viewport frame");
1054 : // position: fixed items are reflowed into and only drawn inside the
1055 : // viewport, or the scroll position clamping scrollport size, if one is
1056 : // set.
1057 0 : nsIPresShell* ps = aFrame->PresContext()->PresShell();
1058 0 : dirtyRectRelativeToDirtyFrame.MoveTo(0, 0);
1059 0 : if (ps->IsScrollPositionClampingScrollPortSizeSet()) {
1060 0 : dirtyRectRelativeToDirtyFrame.SizeTo(ps->GetScrollPositionClampingScrollPortSize());
1061 : } else {
1062 0 : dirtyRectRelativeToDirtyFrame.SizeTo(aDirtyFrame->GetSize());
1063 : }
1064 : }
1065 197 : nsRect dirty = dirtyRectRelativeToDirtyFrame - aFrame->GetOffsetTo(aDirtyFrame);
1066 197 : nsRect overflowRect = aFrame->GetVisualOverflowRect();
1067 :
1068 112 : if (aFrame->IsTransformed() &&
1069 0 : EffectCompositor::HasAnimationsForCompositor(aFrame,
1070 : eCSSProperty_transform)) {
1071 : /**
1072 : * Add a fuzz factor to the overflow rectangle so that elements only just
1073 : * out of view are pulled into the display list, so they can be
1074 : * prerendered if necessary.
1075 : */
1076 0 : overflowRect.Inflate(nsPresContext::CSSPixelsToAppUnits(32));
1077 : }
1078 :
1079 139 : if (!dirty.IntersectRect(dirty, overflowRect) &&
1080 27 : !(aFrame->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO)) {
1081 27 : return;
1082 : }
1083 :
1084 : // mClipState.GetClipChainForContainingBlockDescendants can return pointers
1085 : // to objects on the stack, so we need to clone the chain.
1086 : const DisplayItemClipChain* clipChain =
1087 85 : CopyWholeChain(mClipState.GetClipChainForContainingBlockDescendants());
1088 85 : const DisplayItemClipChain* combinedClipChain = mClipState.GetCurrentCombinedClipChain(this);
1089 85 : const ActiveScrolledRoot* asr = mCurrentActiveScrolledRoot;
1090 85 : OutOfFlowDisplayData* data = new OutOfFlowDisplayData(clipChain, combinedClipChain, asr, dirty);
1091 85 : aFrame->SetProperty(nsDisplayListBuilder::OutOfFlowDisplayDataProperty(), data);
1092 :
1093 85 : MarkFrameForDisplay(aFrame, aDirtyFrame);
1094 : }
1095 :
1096 112 : static void UnmarkFrameForDisplay(nsIFrame* aFrame) {
1097 112 : aFrame->DeleteProperty(nsDisplayListBuilder::OutOfFlowDisplayDataProperty());
1098 :
1099 855 : for (nsIFrame* f = aFrame; f;
1100 : f = nsLayoutUtils::GetParentOrPlaceholderFor(f)) {
1101 831 : if (!(f->GetStateBits() & NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO))
1102 88 : return;
1103 743 : f->RemoveStateBits(NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO);
1104 : }
1105 : }
1106 :
1107 106 : nsDisplayListBuilder::~nsDisplayListBuilder() {
1108 53 : NS_ASSERTION(mFramesMarkedForDisplay.Length() == 0,
1109 : "All frames should have been unmarked");
1110 53 : NS_ASSERTION(mPresShellStates.Length() == 0,
1111 : "All presshells should have been exited");
1112 53 : NS_ASSERTION(!mCurrentTableItem, "No table item should be active");
1113 :
1114 53 : nsCSSRendering::EndFrameTreesLocked();
1115 :
1116 53 : for (ActiveScrolledRoot* asr : mActiveScrolledRoots) {
1117 : asr->ActiveScrolledRoot::~ActiveScrolledRoot();
1118 : }
1119 1158 : for (DisplayItemClipChain* c : mClipChainsToDestroy) {
1120 1105 : c->DisplayItemClipChain::~DisplayItemClipChain();
1121 : }
1122 :
1123 53 : MOZ_COUNT_DTOR(nsDisplayListBuilder);
1124 53 : }
1125 :
1126 : uint32_t
1127 596 : nsDisplayListBuilder::GetBackgroundPaintFlags() {
1128 596 : uint32_t flags = 0;
1129 596 : if (mSyncDecodeImages) {
1130 0 : flags |= nsCSSRendering::PAINTBG_SYNC_DECODE_IMAGES;
1131 : }
1132 596 : if (mIsPaintingToWindow) {
1133 584 : flags |= nsCSSRendering::PAINTBG_TO_WINDOW;
1134 : }
1135 596 : return flags;
1136 : }
1137 :
1138 : void
1139 445 : nsDisplayListBuilder::SubtractFromVisibleRegion(nsRegion* aVisibleRegion,
1140 : const nsRegion& aRegion)
1141 : {
1142 445 : if (aRegion.IsEmpty())
1143 393 : return;
1144 :
1145 104 : nsRegion tmp;
1146 52 : tmp.Sub(*aVisibleRegion, aRegion);
1147 : // Don't let *aVisibleRegion get too complex, but don't let it fluff out
1148 : // to its bounds either, which can be very bad (see bug 516740).
1149 : // Do let aVisibleRegion get more complex if by doing so we reduce its
1150 : // area by at least half.
1151 52 : if (GetAccurateVisibleRegions() || tmp.GetNumRects() <= 15 ||
1152 0 : tmp.Area() <= aVisibleRegion->Area()/2) {
1153 52 : *aVisibleRegion = tmp;
1154 : }
1155 : }
1156 :
1157 : nsCaret *
1158 0 : nsDisplayListBuilder::GetCaret() {
1159 0 : RefPtr<nsCaret> caret = CurrentPresShellState()->mPresShell->GetCaret();
1160 0 : return caret;
1161 : }
1162 :
1163 : void
1164 53 : nsDisplayListBuilder::EnterPresShell(nsIFrame* aReferenceFrame,
1165 : bool aPointerEventsNoneDoc)
1166 : {
1167 53 : PresShellState* state = mPresShellStates.AppendElement();
1168 53 : state->mPresShell = aReferenceFrame->PresContext()->PresShell();
1169 53 : state->mCaretFrame = nullptr;
1170 53 : state->mFirstFrameMarkedForDisplay = mFramesMarkedForDisplay.Length();
1171 :
1172 53 : state->mPresShell->UpdateCanvasBackground();
1173 :
1174 53 : if (mIsPaintingToWindow) {
1175 26 : mReferenceFrame->AddPaintedPresShell(state->mPresShell);
1176 :
1177 26 : state->mPresShell->IncrementPaintCount();
1178 : }
1179 :
1180 53 : bool buildCaret = mBuildCaret;
1181 53 : if (mIgnoreSuppression || !state->mPresShell->IsPaintingSuppressed()) {
1182 53 : state->mIsBackgroundOnly = false;
1183 : } else {
1184 0 : state->mIsBackgroundOnly = true;
1185 0 : buildCaret = false;
1186 : }
1187 :
1188 53 : bool pointerEventsNone = aPointerEventsNoneDoc;
1189 53 : if (IsInSubdocument()) {
1190 0 : pointerEventsNone |= mPresShellStates[mPresShellStates.Length() - 2].mInsidePointerEventsNoneDoc;
1191 : }
1192 53 : state->mInsidePointerEventsNoneDoc = pointerEventsNone;
1193 :
1194 53 : if (!buildCaret)
1195 27 : return;
1196 :
1197 52 : RefPtr<nsCaret> caret = state->mPresShell->GetCaret();
1198 26 : state->mCaretFrame = caret->GetPaintGeometry(&state->mCaretRect);
1199 26 : if (state->mCaretFrame) {
1200 0 : mFramesMarkedForDisplay.AppendElement(state->mCaretFrame);
1201 0 : MarkFrameForDisplay(state->mCaretFrame, nullptr);
1202 : }
1203 :
1204 26 : nsPresContext* pc = aReferenceFrame->PresContext();
1205 52 : nsCOMPtr<nsIDocShell> docShell = pc->GetDocShell();
1206 26 : if (docShell) {
1207 26 : docShell->GetWindowDraggingAllowed(&mWindowDraggingAllowed);
1208 : }
1209 26 : mIsInChromePresContext = pc->IsChrome();
1210 : }
1211 :
1212 : // A non-blank paint is a paint that does not just contain the canvas background.
1213 : static bool
1214 2 : DisplayListIsNonBlank(nsDisplayList* aList)
1215 : {
1216 2 : for (nsDisplayItem* i = aList->GetBottom(); i != nullptr; i = i->GetAbove()) {
1217 2 : switch (i->GetType()) {
1218 : case nsDisplayItem::TYPE_LAYER_EVENT_REGIONS:
1219 : case nsDisplayItem::TYPE_CANVAS_BACKGROUND_COLOR:
1220 : case nsDisplayItem::TYPE_CANVAS_BACKGROUND_IMAGE:
1221 0 : continue;
1222 : case nsDisplayItem::TYPE_SOLID_COLOR:
1223 : case nsDisplayItem::TYPE_BACKGROUND:
1224 : case nsDisplayItem::TYPE_BACKGROUND_COLOR:
1225 2 : if (i->Frame()->IsCanvasFrame()) {
1226 0 : continue;
1227 : }
1228 2 : return true;
1229 : default:
1230 0 : return true;
1231 : }
1232 : }
1233 0 : return false;
1234 : }
1235 :
1236 : void
1237 53 : nsDisplayListBuilder::LeavePresShell(nsIFrame* aReferenceFrame, nsDisplayList* aPaintedContents)
1238 : {
1239 53 : NS_ASSERTION(CurrentPresShellState()->mPresShell ==
1240 : aReferenceFrame->PresContext()->PresShell(),
1241 : "Presshell mismatch");
1242 :
1243 53 : if (mIsPaintingToWindow) {
1244 26 : nsPresContext* pc = aReferenceFrame->PresContext();
1245 26 : if (!pc->HadNonBlankPaint()) {
1246 4 : if (!CurrentPresShellState()->mIsBackgroundOnly &&
1247 2 : DisplayListIsNonBlank(aPaintedContents)) {
1248 2 : pc->NotifyNonBlankPaint();
1249 : }
1250 : }
1251 : }
1252 :
1253 53 : ResetMarkedFramesForDisplayList();
1254 53 : mPresShellStates.SetLength(mPresShellStates.Length() - 1);
1255 :
1256 53 : if (!mPresShellStates.IsEmpty()) {
1257 0 : nsPresContext* pc = CurrentPresContext();
1258 0 : nsCOMPtr<nsIDocShell> docShell = pc->GetDocShell();
1259 0 : if (docShell) {
1260 0 : docShell->GetWindowDraggingAllowed(&mWindowDraggingAllowed);
1261 : }
1262 0 : mIsInChromePresContext = pc->IsChrome();
1263 : }
1264 53 : }
1265 :
1266 : void
1267 53 : nsDisplayListBuilder::ResetMarkedFramesForDisplayList()
1268 : {
1269 : // Unmark and pop off the frames marked for display in this pres shell.
1270 53 : uint32_t firstFrameForShell = CurrentPresShellState()->mFirstFrameMarkedForDisplay;
1271 330 : for (uint32_t i = firstFrameForShell;
1272 165 : i < mFramesMarkedForDisplay.Length(); ++i) {
1273 112 : UnmarkFrameForDisplay(mFramesMarkedForDisplay[i]);
1274 : }
1275 53 : mFramesMarkedForDisplay.SetLength(firstFrameForShell);
1276 53 : }
1277 :
1278 : void
1279 549 : nsDisplayListBuilder::MarkFramesForDisplayList(nsIFrame* aDirtyFrame,
1280 : const nsFrameList& aFrames,
1281 : const nsRect& aDirtyRect) {
1282 549 : mFramesMarkedForDisplay.SetCapacity(mFramesMarkedForDisplay.Length() + aFrames.GetLength());
1283 661 : for (nsIFrame* e : aFrames) {
1284 : // Skip the AccessibleCaret frame when building no caret.
1285 112 : if (!IsBuildingCaret()) {
1286 27 : nsIContent* content = e->GetContent();
1287 27 : if (content && content->IsInNativeAnonymousSubtree() && content->IsElement()) {
1288 0 : auto classList = content->AsElement()->ClassList();
1289 0 : if (classList->Contains(NS_LITERAL_STRING("moz-accessiblecaret"))) {
1290 0 : continue;
1291 : }
1292 : }
1293 : }
1294 112 : mFramesMarkedForDisplay.AppendElement(e);
1295 112 : MarkOutOfFlowFrameForDisplay(aDirtyFrame, e, aDirtyRect);
1296 : }
1297 :
1298 549 : if (!aDirtyFrame->GetParent()) {
1299 : // This is the viewport frame of aDirtyFrame's presshell.
1300 : // Store the current display data so that it can be used for fixed
1301 : // background images.
1302 53 : NS_ASSERTION(CurrentPresShellState()->mPresShell ==
1303 : aDirtyFrame->PresContext()->PresShell(),
1304 : "Presshell mismatch");
1305 53 : MOZ_ASSERT(!CurrentPresShellState()->mFixedBackgroundDisplayData,
1306 : "already traversed this presshell's root frame?");
1307 :
1308 : const DisplayItemClipChain* clipChain =
1309 53 : CopyWholeChain(mClipState.GetClipChainForContainingBlockDescendants());
1310 53 : const DisplayItemClipChain* combinedClipChain = mClipState.GetCurrentCombinedClipChain(this);
1311 53 : const ActiveScrolledRoot* asr = mCurrentActiveScrolledRoot;
1312 53 : CurrentPresShellState()->mFixedBackgroundDisplayData.emplace(
1313 53 : clipChain, combinedClipChain, asr, aDirtyRect);
1314 : }
1315 549 : }
1316 :
1317 : /**
1318 : * Mark all preserve-3d children with
1319 : * NS_FRAME_FORCE_DISPLAY_LIST_DESCEND_INTO to make sure
1320 : * nsFrame::BuildDisplayListForChild() would visit them. Also compute
1321 : * dirty rect for preserve-3d children.
1322 : *
1323 : * @param aDirtyFrame is the frame to mark children extending context.
1324 : */
1325 : void
1326 0 : nsDisplayListBuilder::MarkPreserve3DFramesForDisplayList(nsIFrame* aDirtyFrame)
1327 : {
1328 0 : AutoTArray<nsIFrame::ChildList,4> childListArray;
1329 0 : aDirtyFrame->GetChildLists(&childListArray);
1330 0 : nsIFrame::ChildListArrayIterator lists(childListArray);
1331 0 : for (; !lists.IsDone(); lists.Next()) {
1332 0 : nsFrameList::Enumerator childFrames(lists.CurrentList());
1333 0 : for (; !childFrames.AtEnd(); childFrames.Next()) {
1334 0 : nsIFrame *child = childFrames.get();
1335 0 : if (child->Combines3DTransformWithAncestors()) {
1336 0 : mFramesMarkedForDisplay.AppendElement(child);
1337 0 : MarkFrameForDisplay(child, aDirtyFrame);
1338 : }
1339 : }
1340 : }
1341 0 : }
1342 :
1343 : void*
1344 3674 : nsDisplayListBuilder::Allocate(size_t aSize)
1345 : {
1346 3674 : return mPool.Allocate(aSize);
1347 : }
1348 :
1349 : ActiveScrolledRoot*
1350 2 : nsDisplayListBuilder::AllocateActiveScrolledRoot(const ActiveScrolledRoot* aParent,
1351 : nsIScrollableFrame* aScrollableFrame)
1352 : {
1353 2 : void* p = Allocate(sizeof(ActiveScrolledRoot));
1354 : ActiveScrolledRoot* asr =
1355 2 : new (KnownNotNull, p) ActiveScrolledRoot(aParent, aScrollableFrame);
1356 2 : mActiveScrolledRoots.AppendElement(asr);
1357 2 : return asr;
1358 : }
1359 :
1360 : const DisplayItemClipChain*
1361 1105 : nsDisplayListBuilder::AllocateDisplayItemClipChain(const DisplayItemClip& aClip,
1362 : const ActiveScrolledRoot* aASR,
1363 : const DisplayItemClipChain* aParent)
1364 : {
1365 1105 : void* p = Allocate(sizeof(DisplayItemClipChain));
1366 1105 : DisplayItemClipChain* c = new (KnownNotNull, p) DisplayItemClipChain{ aClip, aASR, aParent };
1367 1105 : mClipChainsToDestroy.AppendElement(c);
1368 1105 : return c;
1369 : }
1370 :
1371 2511 : struct ClipChainItem {
1372 : DisplayItemClip clip;
1373 : const ActiveScrolledRoot* asr;
1374 : };
1375 :
1376 : const DisplayItemClipChain*
1377 973 : nsDisplayListBuilder::CreateClipChainIntersection(const DisplayItemClipChain* aAncestor,
1378 : const DisplayItemClipChain* aLeafClip1,
1379 : const DisplayItemClipChain* aLeafClip2)
1380 : {
1381 1946 : AutoTArray<ClipChainItem,8> intersectedClips;
1382 :
1383 973 : const DisplayItemClipChain* clip1 = aLeafClip1;
1384 973 : const DisplayItemClipChain* clip2 = aLeafClip2;
1385 :
1386 : const ActiveScrolledRoot* asr =
1387 973 : ActiveScrolledRoot::PickDescendant(clip1 ? clip1->mASR : nullptr,
1388 973 : clip2 ? clip2->mASR : nullptr);
1389 :
1390 : // Build up the intersection from the leaf to the root and put it into
1391 : // intersectedClips. The loop below will convert intersectedClips into an
1392 : // actual DisplayItemClipChain.
1393 : // (We need to do this in two passes because we need the parent clip in order
1394 : // to create the DisplayItemClipChain object, but the parent clip has not
1395 : // been created at that point.)
1396 977 : while (!aAncestor || asr != aAncestor->mASR) {
1397 975 : if (clip1 && clip1->mASR == asr) {
1398 386 : if (clip2 && clip2->mASR == asr) {
1399 738 : DisplayItemClip intersection = clip1->mClip;
1400 369 : intersection.IntersectWith(clip2->mClip);
1401 369 : intersectedClips.AppendElement(ClipChainItem{ intersection, asr });
1402 738 : clip2 = clip2->mParent;
1403 : } else {
1404 17 : intersectedClips.AppendElement(ClipChainItem{ clip1->mClip, asr });
1405 : }
1406 386 : clip1 = clip1->mParent;
1407 589 : } else if (clip2 && clip2->mASR == asr) {
1408 451 : intersectedClips.AppendElement(ClipChainItem{ clip2->mClip, asr });
1409 451 : clip2 = clip2->mParent;
1410 : }
1411 975 : if (!asr) {
1412 973 : MOZ_ASSERT(!aAncestor, "We should have exited this loop earlier");
1413 973 : break;
1414 : }
1415 2 : asr = asr->mParent;
1416 : }
1417 :
1418 : // Convert intersectedClips into a DisplayItemClipChain.
1419 973 : const DisplayItemClipChain* parentSC = aAncestor;
1420 1810 : for (auto& sc : Reversed(intersectedClips)) {
1421 837 : parentSC = AllocateDisplayItemClipChain(sc.clip, sc.asr, parentSC);
1422 : }
1423 1946 : return parentSC;
1424 : }
1425 :
1426 : const DisplayItemClipChain*
1427 138 : nsDisplayListBuilder::CopyWholeChain(const DisplayItemClipChain* aClipChain)
1428 : {
1429 138 : return CreateClipChainIntersection(nullptr, aClipChain, nullptr);
1430 : }
1431 :
1432 : const nsIFrame*
1433 14115 : nsDisplayListBuilder::FindReferenceFrameFor(const nsIFrame *aFrame,
1434 : nsPoint* aOffset)
1435 : {
1436 14115 : if (aFrame == mCurrentFrame) {
1437 11550 : if (aOffset) {
1438 7516 : *aOffset = mCurrentOffsetToReferenceFrame;
1439 : }
1440 11550 : return mCurrentReferenceFrame;
1441 : }
1442 17743 : for (const nsIFrame* f = aFrame; f; f = nsLayoutUtils::GetCrossDocParentFrame(f))
1443 : {
1444 17743 : if (f == mReferenceFrame || f->IsTransformed()) {
1445 2565 : if (aOffset) {
1446 374 : *aOffset = aFrame->GetOffsetToCrossDoc(f);
1447 : }
1448 2565 : return f;
1449 : }
1450 : }
1451 0 : if (aOffset) {
1452 0 : *aOffset = aFrame->GetOffsetToCrossDoc(mReferenceFrame);
1453 : }
1454 0 : return mReferenceFrame;
1455 : }
1456 :
1457 : // Sticky frames are active if their nearest scrollable frame is also active.
1458 : static bool
1459 0 : IsStickyFrameActive(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame, nsIFrame* aParent)
1460 : {
1461 0 : MOZ_ASSERT(aFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY);
1462 :
1463 : // Find the nearest scrollframe.
1464 0 : nsIFrame* cursor = aFrame;
1465 0 : nsIFrame* parent = aParent;
1466 0 : if (!parent) {
1467 0 : parent = nsLayoutUtils::GetCrossDocParentFrame(aFrame);
1468 : }
1469 0 : while (!parent->IsScrollFrame()) {
1470 0 : cursor = parent;
1471 0 : if ((parent = nsLayoutUtils::GetCrossDocParentFrame(cursor)) == nullptr) {
1472 0 : return false;
1473 : }
1474 : }
1475 :
1476 0 : nsIScrollableFrame* sf = do_QueryFrame(parent);
1477 0 : return sf->IsScrollingActive(aBuilder) && sf->GetScrolledFrame() == cursor;
1478 : }
1479 :
1480 : nsDisplayListBuilder::AGRState
1481 3918 : nsDisplayListBuilder::IsAnimatedGeometryRoot(nsIFrame* aFrame,
1482 : nsIFrame** aParent)
1483 : {
1484 3918 : if (aFrame == mReferenceFrame) {
1485 182 : return AGR_YES;
1486 : }
1487 3736 : if (!IsPaintingToWindow()) {
1488 307 : if (aParent) {
1489 0 : *aParent = nsLayoutUtils::GetCrossDocParentFrame(aFrame);
1490 : }
1491 307 : return AGR_NO;
1492 : }
1493 :
1494 3429 : if (nsLayoutUtils::IsPopup(aFrame))
1495 0 : return AGR_YES;
1496 3429 : if (ActiveLayerTracker::IsOffsetOrMarginStyleAnimated(aFrame)) {
1497 0 : const bool inBudget = AddToAGRBudget(aFrame);
1498 0 : if (inBudget) {
1499 0 : return AGR_YES;
1500 : }
1501 : }
1502 3429 : if (!aFrame->GetParent() &&
1503 0 : nsLayoutUtils::ViewportHasDisplayPort(aFrame->PresContext())) {
1504 : // Viewport frames in a display port need to be animated geometry roots
1505 : // for background-attachment:fixed elements.
1506 0 : return AGR_YES;
1507 : }
1508 3429 : if (aFrame->IsTransformed()) {
1509 0 : return AGR_YES;
1510 : }
1511 :
1512 3429 : nsIFrame* parent = nsLayoutUtils::GetCrossDocParentFrame(aFrame);
1513 3429 : if (!parent)
1514 0 : return AGR_YES;
1515 :
1516 3429 : bool maybe = false; // Possible to transition from not being an AGR
1517 : // to being an AGR without a style change.
1518 :
1519 3429 : LayoutFrameType parentType = parent->Type();
1520 : // Treat the slider thumb as being as an active scrolled root when it wants
1521 : // its own layer so that it can move without repainting.
1522 3429 : if (parentType == LayoutFrameType::Slider) {
1523 0 : if (nsLayoutUtils::IsScrollbarThumbLayerized(aFrame)) {
1524 0 : return AGR_YES;
1525 : }
1526 0 : maybe = true;
1527 : }
1528 :
1529 3429 : if (aFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY) {
1530 0 : if (IsStickyFrameActive(this, aFrame, parent)) {
1531 0 : return AGR_YES;
1532 : }
1533 0 : maybe = true;
1534 : }
1535 :
1536 3429 : if (parentType == LayoutFrameType::Scroll ||
1537 : parentType == LayoutFrameType::ListControl) {
1538 239 : nsIScrollableFrame* sf = do_QueryFrame(parent);
1539 239 : if (sf->GetScrolledFrame() == aFrame) {
1540 233 : if (sf->IsScrollingActive(this)) {
1541 4 : return AGR_YES;
1542 : }
1543 229 : maybe = true;
1544 : }
1545 : }
1546 :
1547 : // Fixed-pos frames are parented by the viewport frame, which has no parent.
1548 3425 : if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(aFrame)) {
1549 0 : return AGR_YES;
1550 : }
1551 :
1552 3425 : if ((aFrame->GetStateBits() & NS_FRAME_MAY_BE_TRANSFORMED) &&
1553 0 : aFrame->IsFrameOfType(nsIFrame::eSVG)) {
1554 : // For SVG containers, they always have
1555 : // NS_FRAME_MAY_BE_TRANSFORMED bit. However, they would be
1556 : // affected by the fragement identifiers in the svgView form at
1557 : // runtime without a new style context.
1558 : // For example, layout/reftests/svg/fragmentIdentifier-01.xhtml
1559 : //
1560 : // see https://www.w3.org/TR/SVG/linking.html#SVGFragmentIdentifiers
1561 0 : maybe = true;
1562 : }
1563 :
1564 3425 : if (aParent) {
1565 85 : *aParent = parent;
1566 : }
1567 3425 : return !maybe ? AGR_NO : AGR_MAYBE;
1568 : }
1569 :
1570 : nsIFrame*
1571 85 : nsDisplayListBuilder::FindAnimatedGeometryRootFrameFor(nsIFrame* aFrame)
1572 : {
1573 85 : MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(RootReferenceFrame(), aFrame));
1574 85 : nsIFrame* cursor = aFrame;
1575 255 : while (cursor != RootReferenceFrame()) {
1576 : nsIFrame* next;
1577 85 : if (IsAnimatedGeometryRoot(cursor, &next) == AGR_YES)
1578 0 : return cursor;
1579 85 : cursor = next;
1580 : }
1581 85 : return cursor;
1582 : }
1583 :
1584 : void
1585 1 : nsDisplayListBuilder::RecomputeCurrentAnimatedGeometryRoot()
1586 : {
1587 1 : if (*mCurrentAGR != mCurrentFrame &&
1588 0 : IsAnimatedGeometryRoot(const_cast<nsIFrame*>(mCurrentFrame)) == AGR_YES) {
1589 0 : AnimatedGeometryRoot* oldAGR = mCurrentAGR;
1590 0 : mCurrentAGR = WrapAGRForFrame(const_cast<nsIFrame*>(mCurrentFrame), mCurrentAGR);
1591 :
1592 : // Iterate the AGR cache and look for any objects that reference the old AGR and check
1593 : // to see if they need to be updated. AGRs can be in the cache multiple times, so we may
1594 : // end up doing the work multiple times for AGRs that don't change.
1595 0 : for (auto iter = mFrameToAnimatedGeometryRootMap.Iter(); !iter.Done(); iter.Next()) {
1596 0 : AnimatedGeometryRoot* cached = iter.UserData();
1597 0 : if (cached->mParentAGR == oldAGR && cached != mCurrentAGR) {
1598 : // It's possible that this cached AGR struct that has the old AGR as a parent
1599 : // should instead have mCurrentFrame has a parent.
1600 0 : nsIFrame* parent = FindAnimatedGeometryRootFrameFor(*cached);
1601 0 : MOZ_ASSERT(parent == mCurrentFrame || parent == *oldAGR);
1602 0 : if (parent == mCurrentFrame) {
1603 0 : cached->mParentAGR = mCurrentAGR;
1604 : }
1605 : }
1606 : }
1607 : }
1608 1 : }
1609 :
1610 : static nsRect
1611 505 : ApplyAllClipNonRoundedIntersection(const DisplayItemClipChain* aClipChain, const nsRect& aRect)
1612 : {
1613 505 : nsRect result = aRect;
1614 1509 : while (aClipChain) {
1615 502 : result = aClipChain->mClip.ApplyNonRoundedIntersection(result);
1616 502 : aClipChain = aClipChain->mParent;
1617 : }
1618 505 : return result;
1619 : }
1620 :
1621 : void
1622 3113 : nsDisplayListBuilder::AdjustWindowDraggingRegion(nsIFrame* aFrame)
1623 : {
1624 3113 : if (!mWindowDraggingAllowed || !IsForPainting()) {
1625 2917 : return;
1626 : }
1627 :
1628 2804 : const nsStyleUIReset* styleUI = aFrame->StyleUIReset();
1629 2804 : if (styleUI->mWindowDragging == StyleWindowDragging::Default) {
1630 : // This frame has the default value and doesn't influence the window
1631 : // dragging region.
1632 2299 : return;
1633 : }
1634 :
1635 505 : LayoutDeviceToLayoutDeviceMatrix4x4 referenceFrameToRootReferenceFrame;
1636 :
1637 : // The const_cast is for nsLayoutUtils::GetTransformToAncestor.
1638 505 : nsIFrame* referenceFrame = const_cast<nsIFrame*>(FindReferenceFrameFor(aFrame));
1639 :
1640 505 : if (IsInTransform()) {
1641 : // Only support 2d rectilinear transforms. Transform support is needed for
1642 : // the horizontal flip transform that's applied to the urlbar textbox in
1643 : // RTL mode - it should be able to exclude itself from the draggable region.
1644 0 : referenceFrameToRootReferenceFrame =
1645 0 : ViewAs<LayoutDeviceToLayoutDeviceMatrix4x4>(
1646 0 : nsLayoutUtils::GetTransformToAncestor(referenceFrame, mReferenceFrame));
1647 0 : Matrix referenceFrameToRootReferenceFrame2d;
1648 0 : if (!referenceFrameToRootReferenceFrame.Is2D(&referenceFrameToRootReferenceFrame2d) ||
1649 0 : !referenceFrameToRootReferenceFrame2d.IsRectilinear()) {
1650 0 : return;
1651 : }
1652 : } else {
1653 505 : MOZ_ASSERT(referenceFrame == mReferenceFrame,
1654 : "referenceFrameToRootReferenceFrame needs to be adjusted");
1655 : }
1656 :
1657 : // We do some basic visibility checking on the frame's border box here.
1658 : // We intersect it both with the current dirty rect and with the current
1659 : // clip. Either one is just a conservative approximation on its own, but
1660 : // their intersection luckily works well enough for our purposes, so that
1661 : // we don't have to do full-blown visibility computations.
1662 : // The most important case we need to handle is the scrolled-off tab:
1663 : // If the tab bar overflows, tab parts that are clipped by the scrollbox
1664 : // should not be allowed to interfere with the window dragging region. Using
1665 : // just the current DisplayItemClip is not enough to cover this case
1666 : // completely because clips are reset while building stacking context
1667 : // contents, so for example we'd fail to clip frames that have a clip path
1668 : // applied to them. But the current dirty rect doesn't get reset in that
1669 : // case, so we use it to make this case work.
1670 1010 : nsRect borderBox = aFrame->GetRectRelativeToSelf().Intersect(mDirtyRect);
1671 505 : borderBox += ToReferenceFrame(aFrame);
1672 505 : const DisplayItemClipChain* clip = ClipState().GetCurrentCombinedClipChain(this);
1673 505 : borderBox = ApplyAllClipNonRoundedIntersection(clip, borderBox);
1674 505 : if (!borderBox.IsEmpty()) {
1675 : LayoutDeviceRect devPixelBorderBox =
1676 481 : LayoutDevicePixel::FromAppUnits(borderBox, aFrame->PresContext()->AppUnitsPerDevPixel());
1677 : LayoutDeviceRect transformedDevPixelBorderBox =
1678 481 : TransformBy(referenceFrameToRootReferenceFrame, devPixelBorderBox);
1679 481 : transformedDevPixelBorderBox.Round();
1680 481 : LayoutDeviceIntRect transformedDevPixelBorderBoxInt;
1681 481 : if (transformedDevPixelBorderBox.ToIntRect(&transformedDevPixelBorderBoxInt)) {
1682 481 : if (styleUI->mWindowDragging == StyleWindowDragging::Drag) {
1683 0 : mWindowDraggingRegion.OrWith(transformedDevPixelBorderBoxInt);
1684 : } else {
1685 481 : mWindowNoDraggingRegion.OrWith(transformedDevPixelBorderBoxInt);
1686 : }
1687 : }
1688 : }
1689 : }
1690 :
1691 : LayoutDeviceIntRegion
1692 26 : nsDisplayListBuilder::GetWindowDraggingRegion() const
1693 : {
1694 26 : LayoutDeviceIntRegion result;
1695 26 : result.Sub(mWindowDraggingRegion, mWindowNoDraggingRegion);;
1696 26 : return result;
1697 : }
1698 :
1699 : const uint32_t gWillChangeAreaMultiplier = 3;
1700 0 : static uint32_t GetLayerizationCost(const nsSize& aSize) {
1701 : // There's significant overhead for each layer created from Gecko
1702 : // (IPC+Shared Objects) and from the backend (like an OpenGL texture).
1703 : // Therefore we set a minimum cost threshold of a 64x64 area.
1704 0 : int minBudgetCost = 64 * 64;
1705 :
1706 : uint32_t budgetCost =
1707 0 : std::max(minBudgetCost,
1708 0 : nsPresContext::AppUnitsToIntCSSPixels(aSize.width) *
1709 0 : nsPresContext::AppUnitsToIntCSSPixels(aSize.height));
1710 :
1711 0 : return budgetCost;
1712 : }
1713 :
1714 : bool
1715 0 : nsDisplayListBuilder::AddToWillChangeBudget(nsIFrame* aFrame,
1716 : const nsSize& aSize) {
1717 0 : if (mWillChangeBudgetSet.Contains(aFrame)) {
1718 0 : return true; // Already accounted
1719 : }
1720 :
1721 0 : nsPresContext* key = aFrame->PresContext();
1722 0 : DocumentWillChangeBudget budget;
1723 0 : auto willChangeBudgetEntry = mWillChangeBudget.LookupForAdd(key);
1724 0 : if (willChangeBudgetEntry) {
1725 : // We have an existing entry.
1726 0 : budget = willChangeBudgetEntry.Data();
1727 : } else {
1728 0 : budget = DocumentWillChangeBudget();
1729 0 : willChangeBudgetEntry.OrInsert([&budget] () { return budget; });
1730 : }
1731 :
1732 0 : nsRect area = aFrame->PresContext()->GetVisibleArea();
1733 0 : uint32_t budgetLimit = nsPresContext::AppUnitsToIntCSSPixels(area.width) *
1734 0 : nsPresContext::AppUnitsToIntCSSPixels(area.height);
1735 :
1736 0 : uint32_t cost = GetLayerizationCost(aSize);
1737 0 : bool onBudget = (budget.mBudget + cost) /
1738 0 : gWillChangeAreaMultiplier < budgetLimit;
1739 :
1740 0 : if (onBudget) {
1741 0 : budget.mBudget += cost;
1742 0 : willChangeBudgetEntry.Data() = budget;
1743 0 : mWillChangeBudgetSet.PutEntry(aFrame);
1744 : }
1745 :
1746 0 : return onBudget;
1747 : }
1748 :
1749 : bool
1750 0 : nsDisplayListBuilder::IsInWillChangeBudget(nsIFrame* aFrame,
1751 : const nsSize& aSize) {
1752 0 : bool onBudget = AddToWillChangeBudget(aFrame, aSize);
1753 :
1754 0 : if (!onBudget) {
1755 0 : nsString usageStr;
1756 0 : usageStr.AppendInt(GetLayerizationCost(aSize));
1757 :
1758 0 : nsString multiplierStr;
1759 0 : multiplierStr.AppendInt(gWillChangeAreaMultiplier);
1760 :
1761 0 : nsString limitStr;
1762 0 : nsRect area = aFrame->PresContext()->GetVisibleArea();
1763 0 : uint32_t budgetLimit = nsPresContext::AppUnitsToIntCSSPixels(area.width) *
1764 0 : nsPresContext::AppUnitsToIntCSSPixels(area.height);
1765 0 : limitStr.AppendInt(budgetLimit);
1766 :
1767 0 : const char16_t* params[] = { multiplierStr.get(), limitStr.get() };
1768 0 : aFrame->PresContext()->Document()->WarnOnceAbout(
1769 : nsIDocument::eIgnoringWillChangeOverBudget, false,
1770 0 : params, ArrayLength(params));
1771 : }
1772 0 : return onBudget;
1773 : }
1774 :
1775 : #ifdef MOZ_GFX_OPTIMIZE_MOBILE
1776 : const float gAGRBudgetAreaMultiplier = 0.3;
1777 : #else
1778 : const float gAGRBudgetAreaMultiplier = 3.0;
1779 : #endif
1780 :
1781 : bool
1782 0 : nsDisplayListBuilder::AddToAGRBudget(nsIFrame* aFrame)
1783 : {
1784 0 : if (mAGRBudgetSet.Contains(aFrame)) {
1785 0 : return true;
1786 : }
1787 :
1788 0 : const nsPresContext* presContext = aFrame->PresContext()->GetRootPresContext();
1789 0 : if (!presContext) {
1790 0 : return false;
1791 : }
1792 :
1793 0 : const nsRect area = presContext->GetVisibleArea();
1794 0 : const uint32_t budgetLimit = gAGRBudgetAreaMultiplier *
1795 0 : nsPresContext::AppUnitsToIntCSSPixels(area.width) *
1796 0 : nsPresContext::AppUnitsToIntCSSPixels(area.height);
1797 :
1798 0 : const uint32_t cost = GetLayerizationCost(aFrame->GetSize());
1799 0 : const bool onBudget = mUsedAGRBudget + cost < budgetLimit;
1800 :
1801 0 : if (onBudget) {
1802 0 : mUsedAGRBudget += cost;
1803 0 : mAGRBudgetSet.PutEntry(aFrame);
1804 : }
1805 :
1806 0 : return onBudget;
1807 : }
1808 :
1809 : void
1810 7 : nsDisplayListBuilder::EnterSVGEffectsContents(nsDisplayList* aHoistedItemsStorage)
1811 : {
1812 7 : MOZ_ASSERT(mSVGEffectsBuildingDepth >= 0);
1813 7 : MOZ_ASSERT(aHoistedItemsStorage);
1814 7 : if (mSVGEffectsBuildingDepth == 0) {
1815 7 : MOZ_ASSERT(!mScrollInfoItemsForHoisting);
1816 7 : mScrollInfoItemsForHoisting = aHoistedItemsStorage;
1817 : }
1818 7 : mSVGEffectsBuildingDepth++;
1819 7 : }
1820 :
1821 : void
1822 7 : nsDisplayListBuilder::ExitSVGEffectsContents()
1823 : {
1824 7 : mSVGEffectsBuildingDepth--;
1825 7 : MOZ_ASSERT(mSVGEffectsBuildingDepth >= 0);
1826 7 : MOZ_ASSERT(mScrollInfoItemsForHoisting);
1827 7 : if (mSVGEffectsBuildingDepth == 0) {
1828 7 : mScrollInfoItemsForHoisting = nullptr;
1829 : }
1830 7 : }
1831 :
1832 : void
1833 0 : nsDisplayListBuilder::AppendNewScrollInfoItemForHoisting(nsDisplayScrollInfoLayer* aScrollInfoItem)
1834 : {
1835 0 : MOZ_ASSERT(ShouldBuildScrollInfoItemsForHoisting());
1836 0 : MOZ_ASSERT(mScrollInfoItemsForHoisting);
1837 0 : mScrollInfoItemsForHoisting->AppendNewToTop(aScrollInfoItem);
1838 0 : }
1839 :
1840 : bool
1841 3805 : nsDisplayListBuilder::IsBuildingLayerEventRegions()
1842 : {
1843 3805 : if (IsPaintingToWindow()) {
1844 : // Note: this function and LayerEventRegionsEnabled are the only places
1845 : // that get to query LayoutEventRegionsEnabled 'directly' - other code
1846 : // should call this function.
1847 6834 : return gfxPrefs::LayoutEventRegionsEnabledDoNotUseDirectly() ||
1848 6834 : mAsyncPanZoomEnabled;
1849 : }
1850 388 : return false;
1851 : }
1852 :
1853 : /* static */ bool
1854 3 : nsDisplayListBuilder::LayerEventRegionsEnabled()
1855 : {
1856 : // Note: this function and IsBuildingLayerEventRegions are the only places
1857 : // that get to query LayoutEventRegionsEnabled 'directly' - other code
1858 : // should call this function.
1859 6 : return gfxPrefs::LayoutEventRegionsEnabledDoNotUseDirectly() ||
1860 6 : gfxPlatform::AsyncPanZoomEnabled();
1861 : }
1862 :
1863 587 : void nsDisplayListSet::MoveTo(const nsDisplayListSet& aDestination) const
1864 : {
1865 587 : aDestination.BorderBackground()->AppendToTop(BorderBackground());
1866 587 : aDestination.BlockBorderBackgrounds()->AppendToTop(BlockBorderBackgrounds());
1867 587 : aDestination.Floats()->AppendToTop(Floats());
1868 587 : aDestination.Content()->AppendToTop(Content());
1869 587 : aDestination.PositionedDescendants()->AppendToTop(PositionedDescendants());
1870 587 : aDestination.Outlines()->AppendToTop(Outlines());
1871 587 : }
1872 :
1873 : static void
1874 287 : MoveListTo(nsDisplayList* aList, nsTArray<nsDisplayItem*>* aElements) {
1875 : nsDisplayItem* item;
1876 473 : while ((item = aList->RemoveBottom()) != nullptr) {
1877 186 : aElements->AppendElement(item);
1878 : }
1879 101 : }
1880 :
1881 : nsRect
1882 101 : nsDisplayList::GetBounds(nsDisplayListBuilder* aBuilder) const {
1883 101 : nsRect bounds;
1884 287 : for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) {
1885 186 : bounds.UnionRect(bounds, i->GetClippedBounds(aBuilder));
1886 : }
1887 101 : return bounds;
1888 : }
1889 :
1890 : nsRect
1891 806 : nsDisplayList::GetClippedBoundsWithRespectToASR(nsDisplayListBuilder* aBuilder,
1892 : const ActiveScrolledRoot* aASR) const {
1893 806 : nsRect bounds;
1894 3448 : for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) {
1895 5284 : nsRect r = i->GetClippedBounds(aBuilder);
1896 2642 : if (aASR != i->GetActiveScrolledRoot() && !r.IsEmpty()) {
1897 3 : const DisplayItemClip* clip = DisplayItemClipChain::ClipForASR(i->GetClipChain(), aASR);
1898 : #ifdef DEBUG
1899 3 : if (!gfxPrefs::LayoutUseContainersForRootFrames()) {
1900 3 : MOZ_ASSERT(clip,
1901 : "Need to be clipped wrt aASR. Do not call this function with an ASR that our child items don't have finite bounds wrt.");
1902 : }
1903 : #endif
1904 3 : if (clip) {
1905 3 : r = clip->GetClipRect();
1906 : }
1907 : }
1908 2642 : bounds.UnionRect(bounds, r);
1909 : }
1910 806 : return bounds;
1911 : }
1912 :
1913 : nsRect
1914 562 : nsDisplayList::GetVisibleRect() const {
1915 562 : nsRect result;
1916 2495 : for (nsDisplayItem* i = GetBottom(); i != nullptr; i = i->GetAbove()) {
1917 1933 : result.UnionRect(result, i->GetVisibleRect());
1918 : }
1919 562 : return result;
1920 : }
1921 :
1922 : bool
1923 0 : nsDisplayList::ComputeVisibilityForRoot(nsDisplayListBuilder* aBuilder,
1924 : nsRegion* aVisibleRegion) {
1925 0 : AUTO_PROFILER_LABEL("nsDisplayList::ComputeVisibilityForRoot", GRAPHICS);
1926 :
1927 0 : nsRegion r;
1928 0 : const ActiveScrolledRoot* rootASR = nullptr;
1929 0 : if (gfxPrefs::LayoutUseContainersForRootFrames()) {
1930 0 : rootASR = aBuilder->ActiveScrolledRootForRootScrollframe();
1931 : }
1932 0 : r.And(*aVisibleRegion, GetClippedBoundsWithRespectToASR(aBuilder, rootASR));
1933 0 : return ComputeVisibilityForSublist(aBuilder, aVisibleRegion, r.GetBounds());
1934 : }
1935 :
1936 : static nsRegion
1937 349 : TreatAsOpaque(nsDisplayItem* aItem, nsDisplayListBuilder* aBuilder)
1938 : {
1939 : bool snap;
1940 698 : nsRegion opaque = aItem->GetOpaqueRegion(aBuilder, &snap);
1941 349 : if (aBuilder->IsForPluginGeometry() &&
1942 0 : aItem->GetType() != nsDisplayItem::TYPE_LAYER_EVENT_REGIONS)
1943 : {
1944 : // Treat all leaf chrome items as opaque, unless their frames are opacity:0.
1945 : // Since opacity:0 frames generate an nsDisplayOpacity, that item will
1946 : // not be treated as opaque here, so opacity:0 chrome content will be
1947 : // effectively ignored, as it should be.
1948 : // We treat leaf chrome items as opaque to ensure that they cover
1949 : // content plugins, for security reasons.
1950 : // Non-leaf chrome items don't render contents of their own so shouldn't
1951 : // be treated as opaque (and their bounds is just the union of their
1952 : // children, which might be a large area their contents don't really cover).
1953 0 : nsIFrame* f = aItem->Frame();
1954 0 : if (f->PresContext()->IsChrome() && !aItem->GetChildren() &&
1955 0 : f->StyleEffects()->mOpacity != 0.0) {
1956 0 : opaque = aItem->GetBounds(aBuilder, &snap);
1957 : }
1958 : }
1959 349 : if (opaque.IsEmpty()) {
1960 299 : return opaque;
1961 : }
1962 100 : nsRegion opaqueClipped;
1963 100 : for (auto iter = opaque.RectIter(); !iter.Done(); iter.Next()) {
1964 : opaqueClipped.Or(opaqueClipped,
1965 50 : aItem->GetClip().ApproximateIntersectInward(iter.Get()));
1966 : }
1967 50 : return opaqueClipped;
1968 : }
1969 :
1970 : bool
1971 101 : nsDisplayList::ComputeVisibilityForSublist(nsDisplayListBuilder* aBuilder,
1972 : nsRegion* aVisibleRegion,
1973 : const nsRect& aListVisibleBounds)
1974 : {
1975 : #ifdef DEBUG
1976 202 : nsRegion r;
1977 101 : r.And(*aVisibleRegion, GetBounds(aBuilder));
1978 101 : NS_ASSERTION(r.GetBounds().IsEqualInterior(aListVisibleBounds),
1979 : "bad aListVisibleBounds");
1980 : #endif
1981 :
1982 101 : bool anyVisible = false;
1983 :
1984 202 : AutoTArray<nsDisplayItem*, 512> elements;
1985 101 : MoveListTo(this, &elements);
1986 :
1987 287 : for (int32_t i = elements.Length() - 1; i >= 0; --i) {
1988 186 : nsDisplayItem* item = elements[i];
1989 :
1990 186 : if (item->mForceNotVisible && !item->GetSameCoordinateSystemChildren()) {
1991 0 : NS_ASSERTION(item->mVisibleRect.IsEmpty(),
1992 : "invisible items should have empty vis rect");
1993 : } else {
1994 372 : nsRect bounds = item->GetClippedBounds(aBuilder);
1995 :
1996 372 : nsRegion itemVisible;
1997 186 : itemVisible.And(*aVisibleRegion, bounds);
1998 186 : item->mVisibleRect = itemVisible.GetBounds();
1999 : }
2000 :
2001 186 : if (item->ComputeVisibility(aBuilder, aVisibleRegion)) {
2002 46 : anyVisible = true;
2003 :
2004 92 : nsRegion opaque = TreatAsOpaque(item, aBuilder);
2005 : // Subtract opaque item from the visible region
2006 46 : aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque);
2007 : }
2008 186 : AppendToBottom(item);
2009 : }
2010 :
2011 101 : mIsOpaque = !aVisibleRegion->Intersects(aListVisibleBounds);
2012 202 : return anyVisible;
2013 : }
2014 :
2015 : static bool
2016 50 : TriggerPendingAnimationsOnSubDocuments(nsIDocument* aDocument, void* aReadyTime)
2017 : {
2018 50 : PendingAnimationTracker* tracker = aDocument->GetPendingAnimationTracker();
2019 50 : if (tracker) {
2020 24 : nsIPresShell* shell = aDocument->GetShell();
2021 : // If paint-suppression is in effect then we haven't finished painting
2022 : // this document yet so we shouldn't start animations
2023 24 : if (!shell || !shell->IsPaintingSuppressed()) {
2024 24 : const TimeStamp& readyTime = *static_cast<TimeStamp*>(aReadyTime);
2025 24 : tracker->TriggerPendingAnimationsOnNextTick(readyTime);
2026 : }
2027 : }
2028 : aDocument->EnumerateSubDocuments(TriggerPendingAnimationsOnSubDocuments,
2029 50 : aReadyTime);
2030 50 : return true;
2031 : }
2032 :
2033 : static void
2034 26 : TriggerPendingAnimations(nsIDocument* aDocument,
2035 : const TimeStamp& aReadyTime) {
2036 26 : MOZ_ASSERT(!aReadyTime.IsNull(),
2037 : "Animation ready time is not set. Perhaps we're using a layer"
2038 : " manager that doesn't update it");
2039 : TriggerPendingAnimationsOnSubDocuments(aDocument,
2040 26 : const_cast<TimeStamp*>(&aReadyTime));
2041 26 : }
2042 :
2043 : LayerManager*
2044 99 : nsDisplayListBuilder::GetWidgetLayerManager(nsView** aView)
2045 : {
2046 99 : nsView* view = RootReferenceFrame()->GetView();
2047 99 : if (aView) {
2048 26 : *aView = view;
2049 : }
2050 99 : if (RootReferenceFrame() != nsLayoutUtils::GetDisplayRootFrame(RootReferenceFrame())) {
2051 0 : return nullptr;
2052 : }
2053 99 : nsIWidget* window = RootReferenceFrame()->GetNearestWidget();
2054 99 : if (window) {
2055 99 : return window->GetLayerManager();
2056 : }
2057 0 : return nullptr;
2058 : }
2059 :
2060 : /**
2061 : * We paint by executing a layer manager transaction, constructing a
2062 : * single layer representing the display list, and then making it the
2063 : * root of the layer manager, drawing into the PaintedLayers.
2064 : */
2065 44 : already_AddRefed<LayerManager> nsDisplayList::PaintRoot(nsDisplayListBuilder* aBuilder,
2066 : gfxContext* aCtx,
2067 : uint32_t aFlags)
2068 : {
2069 88 : AUTO_PROFILER_LABEL("nsDisplayList::PaintRoot", GRAPHICS);
2070 :
2071 88 : RefPtr<LayerManager> layerManager;
2072 44 : bool widgetTransaction = false;
2073 44 : bool doBeginTransaction = true;
2074 44 : nsView *view = nullptr;
2075 44 : if (aFlags & PAINT_USE_WIDGET_LAYERS) {
2076 26 : layerManager = aBuilder->GetWidgetLayerManager(&view);
2077 26 : if (layerManager) {
2078 26 : doBeginTransaction = !(aFlags & PAINT_EXISTING_TRANSACTION);
2079 26 : widgetTransaction = true;
2080 : }
2081 : }
2082 44 : if (!layerManager) {
2083 18 : if (!aCtx) {
2084 0 : NS_WARNING("Nowhere to paint into");
2085 0 : return nullptr;
2086 : }
2087 18 : layerManager = new BasicLayerManager(BasicLayerManager::BLM_OFFSCREEN);
2088 : }
2089 :
2090 44 : nsIFrame* frame = aBuilder->RootReferenceFrame();
2091 44 : nsPresContext* presContext = frame->PresContext();
2092 44 : nsIPresShell* presShell = presContext->PresShell();
2093 44 : nsIDocument* document = presShell->GetDocument();
2094 :
2095 88 : if (gfxPrefs::WebRenderLayersFree() &&
2096 44 : layerManager->GetBackendType() == layers::LayersBackend::LAYERS_WR &&
2097 : // We don't yet support many display items used in chrome, so
2098 : // layers-free mode is only for content.
2099 0 : !presContext->IsChrome()) {
2100 0 : if (doBeginTransaction) {
2101 0 : if (aCtx) {
2102 0 : if (!layerManager->BeginTransactionWithTarget(aCtx)) {
2103 0 : return nullptr;
2104 : }
2105 : } else {
2106 0 : if (!layerManager->BeginTransaction()) {
2107 0 : return nullptr;
2108 : }
2109 : }
2110 : }
2111 :
2112 0 : MaybeSetupTransactionIdAllocator(layerManager, presContext);
2113 0 : bool temp = aBuilder->SetIsCompositingCheap(layerManager->IsCompositingCheap());
2114 0 : static_cast<WebRenderLayerManager*>(layerManager.get())->EndTransactionWithoutLayer(this, aBuilder);
2115 0 : aBuilder->SetIsCompositingCheap(temp);
2116 0 : return layerManager.forget();
2117 : }
2118 :
2119 : NotifySubDocInvalidationFunc computeInvalidFunc =
2120 44 : presContext->MayHavePaintEventListenerInSubDocument() ? nsPresContext::NotifySubDocInvalidation : 0;
2121 :
2122 88 : UniquePtr<LayerProperties> props;
2123 88 : RefPtr<ContainerLayer> root;
2124 :
2125 : // Store the existing layer builder to reinstate it on return.
2126 44 : FrameLayerBuilder *oldBuilder = layerManager->GetLayerBuilder();
2127 :
2128 44 : FrameLayerBuilder *layerBuilder = new FrameLayerBuilder();
2129 44 : layerBuilder->Init(aBuilder, layerManager);
2130 :
2131 44 : if (aFlags & PAINT_COMPRESSED) {
2132 1 : layerBuilder->SetLayerTreeCompressionMode();
2133 : }
2134 :
2135 : {
2136 88 : AutoProfilerTracing tracing("Paint", "LayerBuilding");
2137 :
2138 44 : if (doBeginTransaction) {
2139 18 : if (aCtx) {
2140 18 : if (!layerManager->BeginTransactionWithTarget(aCtx)) {
2141 0 : return nullptr;
2142 : }
2143 : } else {
2144 0 : if (!layerManager->BeginTransaction()) {
2145 0 : return nullptr;
2146 : }
2147 : }
2148 : }
2149 :
2150 44 : if (XRE_IsContentProcess() && gfxPrefs::AlwaysPaint()) {
2151 0 : FrameLayerBuilder::InvalidateAllLayers(layerManager);
2152 : }
2153 :
2154 44 : if (widgetTransaction) {
2155 26 : layerBuilder->DidBeginRetainedLayerTransaction(layerManager);
2156 : }
2157 :
2158 18 : bool computeInvalidRect = (computeInvalidFunc ||
2159 62 : (!layerManager->IsCompositingCheap() && layerManager->NeedsWidgetInvalidation())) &&
2160 44 : widgetTransaction;
2161 :
2162 44 : if (computeInvalidRect) {
2163 26 : props = Move(LayerProperties::CloneFrom(layerManager->GetRoot()));
2164 : }
2165 :
2166 : // Clear any ScrollMetadata that may have been set on the root layer on a
2167 : // previous paint. This paint will set new metrics if necessary, and if we
2168 : // don't clear the old one here, we may be left with extra metrics.
2169 44 : if (Layer* rootLayer = layerManager->GetRoot()) {
2170 25 : rootLayer->SetScrollMetadata(nsTArray<ScrollMetadata>());
2171 : }
2172 :
2173 : ContainerLayerParameters containerParameters
2174 44 : (presShell->GetResolution(), presShell->GetResolution());
2175 :
2176 : {
2177 88 : PaintTelemetry::AutoRecord record(PaintTelemetry::Metric::Layerization);
2178 :
2179 : root = layerBuilder->
2180 88 : BuildContainerLayerFor(aBuilder, layerManager, frame, nullptr, this,
2181 44 : containerParameters, nullptr);
2182 :
2183 44 : if (!record.GetStart().IsNull() && gfxPrefs::LayersDrawFPS()) {
2184 0 : if (PaintTiming* pt = ClientLayerManager::MaybeGetPaintTiming(layerManager)) {
2185 0 : pt->flbMs() = (TimeStamp::Now() - record.GetStart()).ToMilliseconds();
2186 : }
2187 : }
2188 : }
2189 :
2190 44 : if (!root) {
2191 0 : layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder);
2192 0 : return nullptr;
2193 : }
2194 : // Root is being scaled up by the X/Y resolution. Scale it back down.
2195 44 : root->SetPostScale(1.0f/containerParameters.mXScale,
2196 88 : 1.0f/containerParameters.mYScale);
2197 44 : root->SetScaleToResolution(presShell->ScaleToResolution(),
2198 44 : containerParameters.mXScale);
2199 70 : if (aBuilder->IsBuildingLayerEventRegions() &&
2200 26 : nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(presShell)) {
2201 0 : root->SetEventRegionsOverride(EventRegionsOverride::ForceDispatchToContent);
2202 : } else {
2203 44 : root->SetEventRegionsOverride(EventRegionsOverride::NoOverride);
2204 : }
2205 :
2206 : // If we're using containerless scrolling, there is still one case where we
2207 : // want the root container layer to have metrics. If the parent process is
2208 : // using XUL windows, there is no root scrollframe, and without explicitly
2209 : // creating metrics there will be no guaranteed top-level APZC.
2210 112 : bool addMetrics = gfxPrefs::LayoutUseContainersForRootFrames() ||
2211 130 : (XRE_IsParentProcess() && !presShell->GetRootScrollFrame());
2212 :
2213 : // Add metrics if there are none in the layer tree with the id (create an id
2214 : // if there isn't one already) of the root scroll frame/root content.
2215 : bool ensureMetricsForRootId =
2216 70 : nsLayoutUtils::AsyncPanZoomEnabled(frame) &&
2217 52 : !gfxPrefs::LayoutUseContainersForRootFrames() &&
2218 96 : aBuilder->IsPaintingToWindow() &&
2219 70 : !presContext->GetParentPresContext();
2220 :
2221 44 : nsIContent* content = nullptr;
2222 44 : nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame();
2223 44 : if (rootScrollFrame) {
2224 20 : content = rootScrollFrame->GetContent();
2225 : } else {
2226 : // If there is no root scroll frame, pick the document element instead.
2227 : // The only case we don't want to do this is in non-APZ fennec, where
2228 : // we want the root xul document to get a null scroll id so that the root
2229 : // content document gets the first non-null scroll id.
2230 24 : content = document->GetDocumentElement();
2231 : }
2232 :
2233 44 : if (ensureMetricsForRootId && content) {
2234 26 : ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor(content);
2235 26 : if (nsLayoutUtils::ContainsMetricsWithId(root, scrollId)) {
2236 2 : ensureMetricsForRootId = false;
2237 : }
2238 : }
2239 :
2240 44 : if (addMetrics || ensureMetricsForRootId) {
2241 24 : bool isRootContent = presContext->IsRootContentDocument();
2242 :
2243 48 : nsRect viewport(aBuilder->ToReferenceFrame(frame), frame->GetSize());
2244 :
2245 24 : root->SetScrollMetadata(
2246 72 : nsLayoutUtils::ComputeScrollMetadata(frame,
2247 : rootScrollFrame, content,
2248 : aBuilder->FindReferenceFrameFor(frame),
2249 24 : root, FrameMetrics::NULL_SCROLL_ID, viewport, Nothing(),
2250 48 : isRootContent, containerParameters));
2251 : }
2252 :
2253 : // NS_WARNING is debug-only, so don't even bother checking the conditions in
2254 : // a release build.
2255 : #ifdef DEBUG
2256 44 : bool usingDisplayport = false;
2257 44 : if (nsIFrame* rootScrollFrame = presShell->GetRootScrollFrame()) {
2258 20 : nsIContent* content = rootScrollFrame->GetContent();
2259 20 : if (content) {
2260 20 : usingDisplayport = nsLayoutUtils::HasDisplayPort(content);
2261 : }
2262 : }
2263 46 : if (usingDisplayport &&
2264 44 : !(root->GetContentFlags() & Layer::CONTENT_OPAQUE) &&
2265 0 : SpammyLayoutWarningsEnabled()) {
2266 : // See bug 693938, attachment 567017
2267 0 : NS_WARNING("Transparent content with displayports can be expensive.");
2268 : }
2269 : #endif
2270 :
2271 44 : layerManager->SetRoot(root);
2272 44 : layerBuilder->WillEndTransaction();
2273 : }
2274 :
2275 88 : if (widgetTransaction ||
2276 : // SVG-as-an-image docs don't paint as part of the retained layer tree,
2277 : // but they still need the invalidation state bits cleared in order for
2278 : // invalidation for CSS/SMIL animation to work properly.
2279 18 : (document && document->IsBeingUsedAsImage())) {
2280 44 : frame->ClearInvalidationStateBits();
2281 : }
2282 :
2283 44 : bool temp = aBuilder->SetIsCompositingCheap(layerManager->IsCompositingCheap());
2284 44 : LayerManager::EndTransactionFlags flags = LayerManager::END_DEFAULT;
2285 44 : if (layerManager->NeedsWidgetInvalidation()) {
2286 18 : if (aFlags & PAINT_NO_COMPOSITE) {
2287 0 : flags = LayerManager::END_NO_COMPOSITE;
2288 : }
2289 : } else {
2290 : // Client layer managers never composite directly, so
2291 : // we don't need to worry about END_NO_COMPOSITE.
2292 26 : if (aBuilder->WillComputePluginGeometry()) {
2293 0 : flags = LayerManager::END_NO_REMOTE_COMPOSITE;
2294 : }
2295 : }
2296 :
2297 : // If this is the content process, we ship plugin geometry updates over with layer
2298 : // updates, so calculate that now before we call EndTransaction.
2299 44 : nsRootPresContext* rootPresContext = presContext->GetRootPresContext();
2300 44 : if (rootPresContext && XRE_IsContentProcess()) {
2301 2 : if (aBuilder->WillComputePluginGeometry()) {
2302 0 : rootPresContext->ComputePluginGeometryUpdates(aBuilder->RootReferenceFrame(), aBuilder, this);
2303 : }
2304 : // The layer system caches plugin configuration information for forwarding
2305 : // with layer updates which needs to get set during reflow. This must be
2306 : // called even if there are no windowed plugins in the page.
2307 2 : rootPresContext->CollectPluginGeometryUpdates(layerManager);
2308 : }
2309 :
2310 44 : MaybeSetupTransactionIdAllocator(layerManager, presContext);
2311 :
2312 44 : layerManager->EndTransaction(FrameLayerBuilder::DrawPaintedLayer,
2313 44 : aBuilder, flags);
2314 44 : aBuilder->SetIsCompositingCheap(temp);
2315 44 : layerBuilder->DidEndTransaction();
2316 :
2317 44 : if (document && widgetTransaction) {
2318 26 : TriggerPendingAnimations(document, layerManager->GetAnimationReadyTime());
2319 : }
2320 :
2321 88 : nsIntRegion invalid;
2322 44 : if (props) {
2323 26 : invalid = props->ComputeDifferences(root, computeInvalidFunc);
2324 18 : } else if (widgetTransaction) {
2325 0 : LayerProperties::ClearInvalidations(root);
2326 : }
2327 :
2328 44 : bool shouldInvalidate = layerManager->NeedsWidgetInvalidation();
2329 44 : if (view) {
2330 26 : if (props) {
2331 26 : if (!invalid.IsEmpty()) {
2332 25 : nsIntRect bounds = invalid.GetBounds();
2333 : nsRect rect(presContext->DevPixelsToAppUnits(bounds.x),
2334 : presContext->DevPixelsToAppUnits(bounds.y),
2335 : presContext->DevPixelsToAppUnits(bounds.width),
2336 50 : presContext->DevPixelsToAppUnits(bounds.height));
2337 25 : if (shouldInvalidate) {
2338 0 : view->GetViewManager()->InvalidateViewNoSuppression(view, rect);
2339 : }
2340 25 : presContext->NotifyInvalidation(layerManager->GetLastTransactionId(), bounds);
2341 : }
2342 0 : } else if (shouldInvalidate) {
2343 0 : view->GetViewManager()->InvalidateView(view);
2344 : }
2345 : }
2346 :
2347 44 : layerManager->SetUserData(&gLayerManagerLayerBuilder, oldBuilder);
2348 44 : return layerManager.forget();
2349 : }
2350 :
2351 0 : uint32_t nsDisplayList::Count() const {
2352 0 : uint32_t count = 0;
2353 0 : for (nsDisplayItem* i = GetBottom(); i; i = i->GetAbove()) {
2354 0 : ++count;
2355 : }
2356 0 : return count;
2357 : }
2358 :
2359 32746 : nsDisplayItem* nsDisplayList::RemoveBottom() {
2360 32746 : nsDisplayItem* item = mSentinel.mAbove;
2361 32746 : if (!item)
2362 27540 : return nullptr;
2363 5206 : mSentinel.mAbove = item->mAbove;
2364 5206 : if (item == mTop) {
2365 : // must have been the only item
2366 1075 : mTop = &mSentinel;
2367 : }
2368 5206 : item->mAbove = nullptr;
2369 5206 : return item;
2370 : }
2371 :
2372 27971 : void nsDisplayList::DeleteAll() {
2373 : nsDisplayItem* item;
2374 30001 : while ((item = RemoveBottom()) != nullptr) {
2375 : #ifdef NIGHTLY_BUILD
2376 2030 : if (XRE_IsContentProcess()) {
2377 : mozilla::Telemetry::Accumulate(mozilla::Telemetry::DISPLAY_ITEM_USAGE_COUNT,
2378 9 : item->GetType());
2379 : }
2380 : #endif
2381 2030 : item->~nsDisplayItem();
2382 : }
2383 25941 : }
2384 :
2385 : static bool
2386 162 : GetMouseThrough(const nsIFrame* aFrame)
2387 : {
2388 162 : if (!aFrame->IsXULBoxFrame())
2389 27 : return false;
2390 :
2391 135 : const nsIFrame* frame = aFrame;
2392 2061 : while (frame) {
2393 963 : if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_ALWAYS) {
2394 0 : return true;
2395 963 : } else if (frame->GetStateBits() & NS_FRAME_MOUSE_THROUGH_NEVER) {
2396 0 : return false;
2397 : }
2398 963 : frame = nsBox::GetParentXULBox(frame);
2399 : }
2400 135 : return false;
2401 : }
2402 :
2403 : static bool
2404 162 : IsFrameReceivingPointerEvents(nsIFrame* aFrame)
2405 : {
2406 : return NS_STYLE_POINTER_EVENTS_NONE !=
2407 162 : aFrame->StyleUserInterface()->GetEffectivePointerEvents(aFrame);
2408 : }
2409 :
2410 : // A list of frames, and their z depth. Used for sorting
2411 : // the results of hit testing.
2412 0 : struct FramesWithDepth
2413 : {
2414 0 : explicit FramesWithDepth(float aDepth) :
2415 0 : mDepth(aDepth)
2416 0 : {}
2417 :
2418 0 : bool operator<(const FramesWithDepth& aOther) const {
2419 0 : if (!FuzzyEqual(mDepth, aOther.mDepth, 0.1f)) {
2420 : // We want to sort so that the shallowest item (highest depth value) is first
2421 0 : return mDepth > aOther.mDepth;
2422 : }
2423 0 : return this < &aOther;
2424 : }
2425 0 : bool operator==(const FramesWithDepth& aOther) const {
2426 0 : return this == &aOther;
2427 : }
2428 :
2429 : float mDepth;
2430 : nsTArray<nsIFrame*> mFrames;
2431 : };
2432 :
2433 : // Sort the frames by depth and then moves all the contained frames to the destination
2434 198 : void FlushFramesArray(nsTArray<FramesWithDepth>& aSource, nsTArray<nsIFrame*>* aDest)
2435 : {
2436 198 : if (aSource.IsEmpty()) {
2437 198 : return;
2438 : }
2439 0 : aSource.Sort();
2440 0 : uint32_t length = aSource.Length();
2441 0 : for (uint32_t i = 0; i < length; i++) {
2442 0 : aDest->AppendElements(Move(aSource[i].mFrames));
2443 : }
2444 0 : aSource.Clear();
2445 : }
2446 :
2447 27 : void nsDisplayList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
2448 : nsDisplayItem::HitTestState* aState,
2449 : nsTArray<nsIFrame*> *aOutFrames) const {
2450 : nsDisplayItem* item;
2451 :
2452 27 : if (aState->mInPreserves3D) {
2453 : // Collect leaves of the current 3D rendering context.
2454 0 : for (item = GetBottom(); item; item = item->GetAbove()) {
2455 0 : auto itemType = item->GetType();
2456 0 : if (itemType != nsDisplayItem::TYPE_TRANSFORM ||
2457 0 : !static_cast<nsDisplayTransform*>(item)->IsLeafOf3DContext()) {
2458 0 : item->HitTest(aBuilder, aRect, aState, aOutFrames);
2459 : } else {
2460 : // One of leaves in the current 3D rendering context.
2461 0 : aState->mItemBuffer.AppendElement(item);
2462 : }
2463 : }
2464 0 : return;
2465 : }
2466 :
2467 27 : int32_t itemBufferStart = aState->mItemBuffer.Length();
2468 198 : for (item = GetBottom(); item; item = item->GetAbove()) {
2469 171 : aState->mItemBuffer.AppendElement(item);
2470 : }
2471 :
2472 54 : AutoTArray<FramesWithDepth, 16> temp;
2473 198 : for (int32_t i = aState->mItemBuffer.Length() - 1; i >= itemBufferStart; --i) {
2474 : // Pop element off the end of the buffer. We want to shorten the buffer
2475 : // so that recursive calls to HitTest have more buffer space.
2476 171 : item = aState->mItemBuffer[i];
2477 171 : aState->mItemBuffer.SetLength(i);
2478 :
2479 : bool snap;
2480 342 : nsRect r = item->GetBounds(aBuilder, &snap).Intersect(aRect);
2481 171 : auto itemType = item->GetType();
2482 : bool same3DContext =
2483 0 : (itemType == nsDisplayItem::TYPE_TRANSFORM &&
2484 342 : static_cast<nsDisplayTransform*>(item)->IsParticipating3DContext()) ||
2485 0 : (itemType == nsDisplayItem::TYPE_PERSPECTIVE &&
2486 171 : item->Frame()->Extend3DContext());
2487 171 : if (same3DContext &&
2488 0 : (itemType != nsDisplayItem::TYPE_TRANSFORM ||
2489 0 : !static_cast<nsDisplayTransform*>(item)->IsLeafOf3DContext())) {
2490 0 : if (!item->GetClip().MayIntersect(aRect)) {
2491 0 : continue;
2492 : }
2493 0 : AutoTArray<nsIFrame*, 1> neverUsed;
2494 : // Start gethering leaves of the 3D rendering context, and
2495 : // append leaves at the end of mItemBuffer. Leaves are
2496 : // processed at following iterations.
2497 0 : aState->mInPreserves3D = true;
2498 0 : item->HitTest(aBuilder, aRect, aState, &neverUsed);
2499 0 : aState->mInPreserves3D = false;
2500 0 : i = aState->mItemBuffer.Length();
2501 0 : continue;
2502 : }
2503 171 : if (same3DContext || item->GetClip().MayIntersect(r)) {
2504 342 : AutoTArray<nsIFrame*, 16> outFrames;
2505 171 : item->HitTest(aBuilder, aRect, aState, &outFrames);
2506 :
2507 : // For 3d transforms with preserve-3d we add hit frames into the temp list
2508 : // so we can sort them later, otherwise we add them directly to the output list.
2509 171 : nsTArray<nsIFrame*> *writeFrames = aOutFrames;
2510 171 : if (item->GetType() == nsDisplayItem::TYPE_TRANSFORM &&
2511 0 : static_cast<nsDisplayTransform*>(item)->IsLeafOf3DContext()) {
2512 0 : if (outFrames.Length()) {
2513 0 : nsDisplayTransform *transform = static_cast<nsDisplayTransform*>(item);
2514 0 : nsPoint point = aRect.TopLeft();
2515 : // A 1x1 rect means a point, otherwise use the center of the rect
2516 0 : if (aRect.width != 1 || aRect.height != 1) {
2517 0 : point = aRect.Center();
2518 : }
2519 0 : temp.AppendElement(FramesWithDepth(transform->GetHitDepthAtPoint(aBuilder, point)));
2520 0 : writeFrames = &temp[temp.Length() - 1].mFrames;
2521 : }
2522 : } else {
2523 : // We may have just finished a run of consecutive preserve-3d transforms,
2524 : // so flush these into the destination array before processing our frame list.
2525 171 : FlushFramesArray(temp, aOutFrames);
2526 : }
2527 :
2528 333 : for (uint32_t j = 0; j < outFrames.Length(); j++) {
2529 162 : nsIFrame *f = outFrames.ElementAt(j);
2530 : // Handle the XUL 'mousethrough' feature and 'pointer-events'.
2531 162 : if (!GetMouseThrough(f) && IsFrameReceivingPointerEvents(f)) {
2532 162 : writeFrames->AppendElement(f);
2533 : }
2534 : }
2535 :
2536 513 : if (aBuilder->HitTestShouldStopAtFirstOpaque() &&
2537 171 : item->GetOpaqueRegion(aBuilder, &snap).Contains(aRect)) {
2538 : // We're exiting early, so pop the remaining items off the buffer.
2539 0 : aState->mItemBuffer.SetLength(itemBufferStart);
2540 0 : break;
2541 : }
2542 : }
2543 : }
2544 : // Clear any remaining preserve-3d transforms.
2545 27 : FlushFramesArray(temp, aOutFrames);
2546 27 : NS_ASSERTION(aState->mItemBuffer.Length() == uint32_t(itemBufferStart),
2547 : "How did we forget to pop some elements?");
2548 : }
2549 :
2550 0 : static nsIContent* FindContentInDocument(nsDisplayItem* aItem, nsIDocument* aDoc) {
2551 0 : nsIFrame* f = aItem->Frame();
2552 0 : while (f) {
2553 0 : nsPresContext* pc = f->PresContext();
2554 0 : if (pc->Document() == aDoc) {
2555 0 : return f->GetContent();
2556 : }
2557 0 : f = nsLayoutUtils::GetCrossDocParentFrame(pc->PresShell()->GetRootFrame());
2558 : }
2559 0 : return nullptr;
2560 : }
2561 :
2562 : struct ZSortItem {
2563 : nsDisplayItem* item;
2564 : int32_t zIndex;
2565 :
2566 416 : explicit ZSortItem(nsDisplayItem* aItem)
2567 416 : : item(aItem), zIndex(aItem->ZIndex()) {}
2568 :
2569 416 : operator nsDisplayItem*() {
2570 416 : return item;
2571 : }
2572 : };
2573 :
2574 : struct ZOrderComparator {
2575 521 : bool operator()(const ZSortItem& aLeft, const ZSortItem& aRight) const {
2576 : // Note that we can't just take the difference of the two
2577 : // z-indices here, because that might overflow a 32-bit int.
2578 521 : return aLeft.zIndex < aRight.zIndex;
2579 : }
2580 : };
2581 :
2582 613 : void nsDisplayList::SortByZOrder() {
2583 613 : Sort<ZSortItem>(ZOrderComparator());
2584 613 : }
2585 :
2586 : struct ContentComparator {
2587 : nsIContent* mCommonAncestor;
2588 :
2589 613 : explicit ContentComparator(nsIContent* aCommonAncestor)
2590 613 : : mCommonAncestor(aCommonAncestor) {}
2591 :
2592 0 : bool operator()(nsDisplayItem* aLeft, nsDisplayItem* aRight) const {
2593 : // It's possible that the nsIContent for aItem1 or aItem2 is in a subdocument
2594 : // of commonAncestor, because display items for subdocuments have been
2595 : // mixed into the same list. Ensure that we're looking at content
2596 : // in commonAncestor's document.
2597 0 : nsIDocument* commonAncestorDoc = mCommonAncestor->OwnerDoc();
2598 0 : nsIContent* content1 = FindContentInDocument(aLeft, commonAncestorDoc);
2599 0 : nsIContent* content2 = FindContentInDocument(aRight, commonAncestorDoc);
2600 0 : if (!content1 || !content2) {
2601 0 : NS_ERROR("Document trees are mixed up!");
2602 : // Something weird going on
2603 0 : return true;
2604 : }
2605 0 : return nsLayoutUtils::CompareTreePosition(content1, content2, mCommonAncestor) < 0;
2606 : }
2607 : };
2608 :
2609 613 : void nsDisplayList::SortByContentOrder(nsIContent* aCommonAncestor) {
2610 613 : Sort<nsDisplayItem*>(ContentComparator(aCommonAncestor));
2611 613 : }
2612 :
2613 2027 : nsDisplayItem::nsDisplayItem(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
2614 : : nsDisplayItem(aBuilder, aFrame,
2615 2027 : aBuilder->CurrentActiveScrolledRoot())
2616 2027 : {}
2617 :
2618 2589 : nsDisplayItem::nsDisplayItem(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
2619 2589 : const ActiveScrolledRoot* aActiveScrolledRoot)
2620 : : mFrame(aFrame)
2621 2589 : , mClipChain(aBuilder->ClipState().GetCurrentCombinedClipChain(aBuilder))
2622 2589 : , mClip(DisplayItemClipChain::ClipForASR(mClipChain, aActiveScrolledRoot))
2623 : , mActiveScrolledRoot(aActiveScrolledRoot)
2624 : , mAnimatedGeometryRoot(nullptr)
2625 2589 : , mForceNotVisible(aBuilder->IsBuildingInvisibleItems())
2626 : #ifdef MOZ_DUMP_PAINTING
2627 10356 : , mPainted(false)
2628 : #endif
2629 : {
2630 2589 : mReferenceFrame = aBuilder->FindReferenceFrameFor(aFrame, &mToReferenceFrame);
2631 : // This can return the wrong result if the item override ShouldFixToViewport(),
2632 : // the item needs to set it again in its constructor.
2633 2589 : mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(aFrame);
2634 2589 : MOZ_ASSERT(nsLayoutUtils::IsAncestorFrameCrossDoc(aBuilder->RootReferenceFrame(),
2635 : *mAnimatedGeometryRoot), "Bad");
2636 2589 : NS_ASSERTION(aBuilder->GetDirtyRect().width >= 0 ||
2637 : !aBuilder->IsForPainting(), "dirty rect not set");
2638 : // The dirty rect is for mCurrentFrame, so we have to use
2639 : // mCurrentOffsetToReferenceFrame
2640 2589 : mVisibleRect = aBuilder->GetDirtyRect() +
2641 : aBuilder->GetCurrentFrameOffsetToReferenceFrame();
2642 2589 : }
2643 :
2644 : /* static */ bool
2645 1514 : nsDisplayItem::ForceActiveLayers()
2646 : {
2647 : static bool sForce = false;
2648 : static bool sForceCached = false;
2649 :
2650 1514 : if (!sForceCached) {
2651 2 : Preferences::AddBoolVarCache(&sForce, "layers.force-active", false);
2652 2 : sForceCached = true;
2653 : }
2654 :
2655 1514 : return sForce;
2656 : }
2657 :
2658 591 : static int32_t ZIndexForFrame(nsIFrame* aFrame)
2659 : {
2660 591 : if (!aFrame->IsAbsPosContainingBlock() && !aFrame->IsFlexOrGridItem())
2661 242 : return 0;
2662 :
2663 349 : const nsStylePosition* position = aFrame->StylePosition();
2664 349 : if (position->mZIndex.GetUnit() == eStyleUnit_Integer)
2665 168 : return position->mZIndex.GetIntValue();
2666 :
2667 : // sort the auto and 0 elements together
2668 181 : return 0;
2669 : }
2670 :
2671 : int32_t
2672 591 : nsDisplayItem::ZIndex() const
2673 : {
2674 591 : return ZIndexForFrame(mFrame);
2675 : }
2676 :
2677 : bool
2678 854 : nsDisplayItem::ComputeVisibility(nsDisplayListBuilder* aBuilder,
2679 : nsRegion* aVisibleRegion)
2680 : {
2681 1484 : return !mVisibleRect.IsEmpty() &&
2682 1484 : !IsInvisibleInRect(aVisibleRegion->GetBounds());
2683 : }
2684 :
2685 : bool
2686 775 : nsDisplayItem::RecomputeVisibility(nsDisplayListBuilder* aBuilder,
2687 : nsRegion* aVisibleRegion) {
2688 775 : if (mForceNotVisible && !GetSameCoordinateSystemChildren()) {
2689 : // mForceNotVisible wants to ensure that this display item doesn't render
2690 : // anything itself. If this item has contents, then we obviously want to
2691 : // render those, so we don't need this check in that case.
2692 0 : NS_ASSERTION(mVisibleRect.IsEmpty(),
2693 : "invisible items without children should have empty vis rect");
2694 : } else {
2695 1550 : nsRect bounds = GetClippedBounds(aBuilder);
2696 :
2697 1550 : nsRegion itemVisible;
2698 775 : itemVisible.And(*aVisibleRegion, bounds);
2699 775 : mVisibleRect = itemVisible.GetBounds();
2700 : }
2701 :
2702 : // When we recompute visibility within layers we don't need to
2703 : // expand the visible region for content behind plugins (the plugin
2704 : // is not in the layer).
2705 775 : if (!ComputeVisibility(aBuilder, aVisibleRegion)) {
2706 472 : mVisibleRect = nsRect();
2707 472 : return false;
2708 : }
2709 :
2710 606 : nsRegion opaque = TreatAsOpaque(this, aBuilder);
2711 303 : aBuilder->SubtractFromVisibleRegion(aVisibleRegion, opaque);
2712 303 : return true;
2713 : }
2714 :
2715 : void
2716 24 : nsDisplayItem::SetClipChain(const DisplayItemClipChain* aClipChain)
2717 : {
2718 24 : mClipChain = aClipChain;
2719 24 : mClip = DisplayItemClipChain::ClipForASR(aClipChain, mActiveScrolledRoot);
2720 24 : }
2721 :
2722 : void
2723 322 : nsDisplayItem::FuseClipChainUpTo(nsDisplayListBuilder* aBuilder, const ActiveScrolledRoot* aASR)
2724 : {
2725 322 : const DisplayItemClipChain* sc = mClipChain;
2726 644 : DisplayItemClip mergedClip;
2727 858 : while (sc && ActiveScrolledRoot::PickDescendant(aASR, sc->mASR) == sc->mASR) {
2728 268 : mergedClip.IntersectWith(sc->mClip);
2729 268 : sc = sc->mParent;
2730 : }
2731 322 : if (mergedClip.HasClip()) {
2732 268 : mClipChain = aBuilder->AllocateDisplayItemClipChain(mergedClip, aASR, sc);
2733 268 : mClip = &mClipChain->mClip;
2734 : } else {
2735 54 : mClipChain = nullptr;
2736 54 : mClip = nullptr;
2737 : }
2738 322 : }
2739 :
2740 : bool
2741 825 : nsDisplayItem::ShouldUseAdvancedLayer(LayerManager* aManager, PrefFunc aFunc)
2742 : {
2743 2475 : if (!gfxPrefs::LayersAdvancedBasicLayerEnabled() &&
2744 1650 : aManager && aManager->GetBackendType() == layers::LayersBackend::LAYERS_BASIC) {
2745 126 : return false;
2746 : }
2747 :
2748 699 : return aFunc();
2749 : }
2750 :
2751 : static const DisplayItemClipChain*
2752 0 : FindCommonAncestorClipForIntersection(const DisplayItemClipChain* aOne,
2753 : const DisplayItemClipChain* aTwo)
2754 : {
2755 0 : for (const ActiveScrolledRoot* asr =
2756 0 : ActiveScrolledRoot::PickDescendant(aOne->mASR, aTwo->mASR);
2757 0 : asr;
2758 0 : asr = asr->mParent) {
2759 0 : if (aOne == aTwo) {
2760 0 : return aOne;
2761 : }
2762 0 : if (aOne->mASR == asr) {
2763 0 : aOne = aOne->mParent;
2764 : }
2765 0 : if (aTwo->mASR == asr) {
2766 0 : aTwo = aTwo->mParent;
2767 : }
2768 0 : if (!aOne) {
2769 0 : return aTwo;
2770 : }
2771 0 : if (!aTwo) {
2772 0 : return aOne;
2773 : }
2774 : }
2775 0 : return nullptr;
2776 : }
2777 :
2778 : void
2779 37 : nsDisplayItem::IntersectClip(nsDisplayListBuilder* aBuilder,
2780 : const DisplayItemClipChain* aOther)
2781 : {
2782 37 : if (!aOther) {
2783 37 : return;
2784 : }
2785 :
2786 : // aOther might be a reference to a clip on the stack. We need to make sure
2787 : // that CreateClipChainIntersection will allocate the actual intersected
2788 : // clip in the builder's arena, so for the mClipChain == nullptr case,
2789 : // we supply nullptr as the common ancestor so that CreateClipChainIntersection
2790 : // clones the whole chain.
2791 : const DisplayItemClipChain* ancestorClip =
2792 0 : mClipChain ? FindCommonAncestorClipForIntersection(mClipChain, aOther) : nullptr;
2793 0 : SetClipChain(aBuilder->CreateClipChainIntersection(ancestorClip, mClipChain, aOther));
2794 : }
2795 :
2796 : nsRect
2797 3883 : nsDisplayItem::GetClippedBounds(nsDisplayListBuilder* aBuilder)
2798 : {
2799 : bool snap;
2800 7766 : nsRect r = GetBounds(aBuilder, &snap);
2801 7766 : return GetClip().ApplyNonRoundedIntersection(r);
2802 : }
2803 :
2804 : already_AddRefed<Layer>
2805 0 : nsDisplayItem::BuildDisplayItemLayer(nsDisplayListBuilder* aBuilder,
2806 : LayerManager* aManager,
2807 : const ContainerLayerParameters& aContainerParameters)
2808 : {
2809 0 : RefPtr<Layer> oldLayer = aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this);
2810 0 : RefPtr<DisplayItemLayer> layer = oldLayer ? oldLayer->AsDisplayItemLayer() : nullptr;
2811 :
2812 0 : if (!layer) {
2813 0 : layer = aManager->CreateDisplayItemLayer();
2814 :
2815 0 : if (!layer) {
2816 0 : return nullptr;
2817 : }
2818 : }
2819 :
2820 0 : aManager->TrackDisplayItemLayer(layer);
2821 0 : layer->SetDisplayItem(this, aBuilder);
2822 0 : layer->SetBaseTransform(gfx::Matrix4x4::Translation(aContainerParameters.mOffset.x,
2823 0 : aContainerParameters.mOffset.y, 0));
2824 0 : return layer.forget();
2825 : }
2826 :
2827 : nsRect
2828 145 : nsDisplaySolidColor::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
2829 : {
2830 145 : *aSnap = true;
2831 145 : return mBounds;
2832 : }
2833 :
2834 : LayerState
2835 26 : nsDisplaySolidColor::GetLayerState(nsDisplayListBuilder* aBuilder,
2836 : LayerManager* aManager,
2837 : const ContainerLayerParameters& aParameters)
2838 : {
2839 26 : if (ForceActiveLayers() || ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowSolidColorLayers)) {
2840 0 : return LAYER_ACTIVE;
2841 : }
2842 26 : return LAYER_NONE;
2843 : }
2844 :
2845 : already_AddRefed<Layer>
2846 0 : nsDisplaySolidColor::BuildLayer(nsDisplayListBuilder* aBuilder,
2847 : LayerManager* aManager,
2848 : const ContainerLayerParameters& aContainerParameters)
2849 : {
2850 : RefPtr<ColorLayer> layer = static_cast<ColorLayer*>
2851 0 : (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
2852 0 : if (!layer) {
2853 0 : layer = aManager->CreateColorLayer();
2854 0 : if (!layer) {
2855 0 : return nullptr;
2856 : }
2857 : }
2858 0 : layer->SetColor(gfx::Color::FromABGR(mColor));
2859 :
2860 0 : const int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
2861 0 : layer->SetBounds(mBounds.ToNearestPixels(appUnitsPerDevPixel));
2862 0 : layer->SetBaseTransform(gfx::Matrix4x4::Translation(aContainerParameters.mOffset.x,
2863 0 : aContainerParameters.mOffset.y, 0));
2864 :
2865 0 : return layer.forget();
2866 : }
2867 :
2868 : void
2869 0 : nsDisplaySolidColor::Paint(nsDisplayListBuilder* aBuilder,
2870 : gfxContext* aCtx)
2871 : {
2872 0 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
2873 0 : DrawTarget* drawTarget = aCtx->GetDrawTarget();
2874 : Rect rect =
2875 0 : NSRectToSnappedRect(mVisibleRect, appUnitsPerDevPixel, *drawTarget);
2876 0 : drawTarget->FillRect(rect, ColorPattern(ToDeviceColor(mColor)));
2877 0 : }
2878 :
2879 : void
2880 0 : nsDisplaySolidColor::WriteDebugInfo(std::stringstream& aStream)
2881 : {
2882 0 : aStream << " (rgba "
2883 0 : << (int)NS_GET_R(mColor) << ","
2884 0 : << (int)NS_GET_G(mColor) << ","
2885 0 : << (int)NS_GET_B(mColor) << ","
2886 0 : << (int)NS_GET_A(mColor) << ")";
2887 0 : }
2888 :
2889 : nsRect
2890 0 : nsDisplaySolidColorRegion::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
2891 : {
2892 0 : *aSnap = true;
2893 0 : return mRegion.GetBounds();
2894 : }
2895 :
2896 : void
2897 0 : nsDisplaySolidColorRegion::Paint(nsDisplayListBuilder* aBuilder,
2898 : gfxContext* aCtx)
2899 : {
2900 0 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
2901 0 : DrawTarget* drawTarget = aCtx->GetDrawTarget();
2902 0 : ColorPattern color(mColor);
2903 0 : for (auto iter = mRegion.RectIter(); !iter.Done(); iter.Next()) {
2904 : Rect rect =
2905 0 : NSRectToSnappedRect(iter.Get(), appUnitsPerDevPixel, *drawTarget);
2906 0 : drawTarget->FillRect(rect, color);
2907 : }
2908 0 : }
2909 :
2910 : void
2911 0 : nsDisplaySolidColorRegion::WriteDebugInfo(std::stringstream& aStream)
2912 : {
2913 0 : aStream << " (rgba "
2914 0 : << int(mColor.r * 255) << ","
2915 0 : << int(mColor.g * 255) << ","
2916 0 : << int(mColor.b * 255) << ","
2917 0 : << mColor.a << ")";
2918 0 : }
2919 :
2920 : static void
2921 0 : RegisterThemeGeometry(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
2922 : nsITheme::ThemeGeometryType aType)
2923 : {
2924 0 : if (aBuilder->IsInChromeDocumentOrPopup() && !aBuilder->IsInTransform()) {
2925 0 : nsIFrame* displayRoot = nsLayoutUtils::GetDisplayRootFrame(aFrame);
2926 0 : nsPoint offset = aBuilder->IsInSubdocument() ? aBuilder->ToReferenceFrame(aFrame)
2927 0 : : aFrame->GetOffsetTo(displayRoot);
2928 0 : nsRect borderBox = nsRect(offset, aFrame->GetSize());
2929 0 : aBuilder->RegisterThemeGeometry(aType,
2930 0 : LayoutDeviceIntRect::FromUnknownRect(
2931 0 : borderBox.ToNearestPixels(
2932 0 : aFrame->PresContext()->AppUnitsPerDevPixel())));
2933 : }
2934 0 : }
2935 :
2936 : // Return the bounds of the viewport relative to |aFrame|'s reference frame.
2937 : // Returns Nothing() if transforming into |aFrame|'s coordinate space fails.
2938 : static Maybe<nsRect>
2939 0 : GetViewportRectRelativeToReferenceFrame(nsDisplayListBuilder* aBuilder,
2940 : nsIFrame* aFrame)
2941 : {
2942 0 : nsIFrame* rootFrame = aFrame->PresContext()->PresShell()->GetRootFrame();
2943 0 : nsRect rootRect = rootFrame->GetRectRelativeToSelf();
2944 0 : if (nsLayoutUtils::TransformRect(rootFrame, aFrame, rootRect) == nsLayoutUtils::TRANSFORM_SUCCEEDED) {
2945 0 : return Some(rootRect + aBuilder->ToReferenceFrame(aFrame));
2946 : }
2947 0 : return Nothing();
2948 : }
2949 :
2950 : /* static */ nsDisplayBackgroundImage::InitData
2951 194 : nsDisplayBackgroundImage::GetInitData(nsDisplayListBuilder* aBuilder,
2952 : nsIFrame* aFrame,
2953 : uint32_t aLayer,
2954 : const nsRect& aBackgroundRect,
2955 : const nsStyleBackground* aBackgroundStyle,
2956 : LayerizeFixed aLayerizeFixed)
2957 : {
2958 194 : nsPresContext* presContext = aFrame->PresContext();
2959 194 : uint32_t flags = aBuilder->GetBackgroundPaintFlags();
2960 194 : const nsStyleImageLayers::Layer &layer = aBackgroundStyle->mImage.mLayers[aLayer];
2961 :
2962 : bool isTransformedFixed;
2963 : nsBackgroundLayerState state =
2964 : nsCSSRendering::PrepareImageLayer(presContext, aFrame, flags,
2965 : aBackgroundRect, aBackgroundRect, layer,
2966 388 : &isTransformedFixed);
2967 :
2968 : // background-attachment:fixed is treated as background-attachment:scroll
2969 : // if it's affected by a transform.
2970 : // See https://www.w3.org/Bugs/Public/show_bug.cgi?id=17521.
2971 : bool shouldTreatAsFixed =
2972 194 : layer.mAttachment == NS_STYLE_IMAGELAYER_ATTACHMENT_FIXED && !isTransformedFixed;
2973 :
2974 194 : bool shouldFixToViewport = shouldTreatAsFixed && !layer.mImage.IsEmpty();
2975 194 : if (shouldFixToViewport &&
2976 194 : aLayerizeFixed == LayerizeFixed::DO_NOT_LAYERIZE_FIXED_BACKGROUND_IF_AVOIDING_COMPONENT_ALPHA_LAYERS &&
2977 0 : !nsLayoutUtils::UsesAsyncScrolling(aFrame)) {
2978 0 : RefPtr<LayerManager> layerManager = aBuilder->GetWidgetLayerManager();
2979 0 : if (layerManager && layerManager->ShouldAvoidComponentAlphaLayers()) {
2980 0 : shouldFixToViewport = false;
2981 : }
2982 : }
2983 :
2984 194 : bool isRasterImage = state.mImageRenderer.IsRasterImage();
2985 388 : nsCOMPtr<imgIContainer> image;
2986 194 : if (isRasterImage) {
2987 72 : image = state.mImageRenderer.GetImage();
2988 : }
2989 : return InitData{
2990 : aBuilder, aFrame, aBackgroundStyle, image, aBackgroundRect,
2991 : state.mFillArea, state.mDestArea, aLayer, isRasterImage,
2992 : shouldFixToViewport
2993 388 : };
2994 : }
2995 :
2996 194 : nsDisplayBackgroundImage::nsDisplayBackgroundImage(const InitData& aInitData)
2997 194 : : nsDisplayImageContainer(aInitData.builder, aInitData.frame)
2998 194 : , mBackgroundStyle(aInitData.backgroundStyle)
2999 : , mImage(aInitData.image)
3000 : , mBackgroundRect(aInitData.backgroundRect)
3001 : , mFillRect(aInitData.fillArea)
3002 : , mDestRect(aInitData.destArea)
3003 194 : , mLayer(aInitData.layer)
3004 194 : , mIsRasterImage(aInitData.isRasterImage)
3005 194 : , mShouldFixToViewport(aInitData.shouldFixToViewport)
3006 970 : , mImageFlags(0)
3007 : {
3008 194 : MOZ_COUNT_CTOR(nsDisplayBackgroundImage);
3009 :
3010 194 : mBounds = GetBoundsInternal(aInitData.builder);
3011 194 : if (mShouldFixToViewport) {
3012 0 : mAnimatedGeometryRoot = aInitData.builder->FindAnimatedGeometryRootFor(this);
3013 :
3014 : // Expand the item's visible rect to cover the entire bounds, limited to the
3015 : // viewport rect. This is necessary because the background's clip can move
3016 : // asynchronously.
3017 0 : if (Maybe<nsRect> viewportRect = GetViewportRectRelativeToReferenceFrame(aInitData.builder, mFrame)) {
3018 0 : mVisibleRect = mBounds.Intersect(*viewportRect);
3019 : }
3020 : }
3021 194 : }
3022 :
3023 388 : nsDisplayBackgroundImage::~nsDisplayBackgroundImage()
3024 : {
3025 : #ifdef NS_BUILD_REFCNT_LOGGING
3026 194 : MOZ_COUNT_DTOR(nsDisplayBackgroundImage);
3027 : #endif
3028 194 : }
3029 :
3030 427 : static nsStyleContext* GetBackgroundStyleContext(nsIFrame* aFrame)
3031 : {
3032 : nsStyleContext *sc;
3033 427 : if (!nsCSSRendering::FindBackground(aFrame, &sc)) {
3034 : // We don't want to bail out if moz-appearance is set on a root
3035 : // node. If it has a parent content node, bail because it's not
3036 : // a root, other wise keep going in order to let the theme stuff
3037 : // draw the background. The canvas really should be drawing the
3038 : // bg, but there's no way to hook that up via css.
3039 0 : if (!aFrame->StyleDisplay()->mAppearance) {
3040 0 : return nullptr;
3041 : }
3042 :
3043 0 : nsIContent* content = aFrame->GetContent();
3044 0 : if (!content || content->GetParent()) {
3045 0 : return nullptr;
3046 : }
3047 :
3048 0 : sc = aFrame->StyleContext();
3049 : }
3050 427 : return sc;
3051 : }
3052 :
3053 : /* static */ void
3054 351 : SetBackgroundClipRegion(DisplayListClipState::AutoSaveRestore& aClipState,
3055 : nsIFrame* aFrame, const nsPoint& aToReferenceFrame,
3056 : const nsStyleImageLayers::Layer& aLayer,
3057 : const nsRect& aBackgroundRect,
3058 : bool aWillPaintBorder)
3059 : {
3060 702 : nsCSSRendering::ImageLayerClipState clip;
3061 351 : nsCSSRendering::GetImageLayerClip(aLayer, aFrame, *aFrame->StyleBorder(),
3062 : aBackgroundRect, aBackgroundRect, aWillPaintBorder,
3063 : aFrame->PresContext()->AppUnitsPerDevPixel(),
3064 351 : &clip);
3065 :
3066 351 : if (clip.mHasAdditionalBGClipArea) {
3067 0 : aClipState.ClipContentDescendants(clip.mAdditionalBGClipArea, clip.mBGClipArea,
3068 0 : clip.mHasRoundedCorners ? clip.mRadii : nullptr);
3069 : } else {
3070 351 : aClipState.ClipContentDescendants(clip.mBGClipArea, clip.mHasRoundedCorners ? clip.mRadii : nullptr);
3071 : }
3072 351 : }
3073 :
3074 : /**
3075 : * This is used for the find bar highlighter overlay. It's only accessible
3076 : * through the AnonymousContent API, so it's not exposed to general web pages.
3077 : */
3078 : static bool
3079 508 : SpecialCutoutRegionCase(nsDisplayListBuilder* aBuilder,
3080 : nsIFrame* aFrame,
3081 : const nsRect& aBackgroundRect,
3082 : nsDisplayList* aList,
3083 : nscolor aColor)
3084 : {
3085 508 : nsIContent* content = aFrame->GetContent();
3086 508 : if (!content) {
3087 0 : return false;
3088 : }
3089 :
3090 508 : void* cutoutRegion = content->GetProperty(nsGkAtoms::cutoutregion);
3091 508 : if (!cutoutRegion) {
3092 508 : return false;
3093 : }
3094 :
3095 0 : if (NS_GET_A(aColor) == 0) {
3096 0 : return true;
3097 : }
3098 :
3099 0 : nsRegion region;
3100 0 : region.Sub(aBackgroundRect, *static_cast<nsRegion*>(cutoutRegion));
3101 0 : region.MoveBy(aBuilder->ToReferenceFrame(aFrame));
3102 : aList->AppendNewToTop(
3103 0 : new (aBuilder) nsDisplaySolidColorRegion(aBuilder, aFrame, region, aColor));
3104 :
3105 0 : return true;
3106 : }
3107 :
3108 :
3109 : /*static*/ bool
3110 508 : nsDisplayBackgroundImage::AppendBackgroundItemsToTop(nsDisplayListBuilder* aBuilder,
3111 : nsIFrame* aFrame,
3112 : const nsRect& aBackgroundRect,
3113 : nsDisplayList* aList,
3114 : bool aAllowWillPaintBorderOptimization,
3115 : nsStyleContext* aStyleContext,
3116 : const nsRect& aBackgroundOriginRect,
3117 : nsIFrame* aSecondaryReferenceFrame)
3118 : {
3119 508 : nsStyleContext* bgSC = aStyleContext;
3120 508 : const nsStyleBackground* bg = nullptr;
3121 1016 : nsRect bgRect = aBackgroundRect + aBuilder->ToReferenceFrame(aFrame);
3122 1016 : nsRect bgOriginRect = bgRect;
3123 508 : if (!aBackgroundOriginRect.IsEmpty()) {
3124 0 : bgOriginRect = aBackgroundOriginRect + aBuilder->ToReferenceFrame(aFrame);
3125 : }
3126 508 : nsPresContext* presContext = aFrame->PresContext();
3127 508 : bool isThemed = aFrame->IsThemed();
3128 508 : if (!isThemed) {
3129 427 : if (!bgSC) {
3130 427 : bgSC = GetBackgroundStyleContext(aFrame);
3131 : }
3132 427 : if (bgSC) {
3133 427 : bg = bgSC->StyleBackground();
3134 : }
3135 : }
3136 :
3137 508 : bool drawBackgroundColor = false;
3138 : // Dummy initialisation to keep Valgrind/Memcheck happy.
3139 : // See bug 1122375 comment 1.
3140 508 : nscolor color = NS_RGBA(0,0,0,0);
3141 508 : if (!nsCSSRendering::IsCanvasFrame(aFrame) && bg) {
3142 : bool drawBackgroundImage;
3143 : color =
3144 : nsCSSRendering::DetermineBackgroundColor(presContext, bgSC, aFrame,
3145 394 : drawBackgroundImage, drawBackgroundColor);
3146 : }
3147 :
3148 508 : if (SpecialCutoutRegionCase(aBuilder, aFrame, aBackgroundRect, aList, color)) {
3149 0 : return false;
3150 : }
3151 :
3152 508 : const nsStyleBorder* borderStyle = aFrame->StyleBorder();
3153 508 : const nsStyleEffects* effectsStyle = aFrame->StyleEffects();
3154 580 : bool hasInsetShadow = effectsStyle->mBoxShadow &&
3155 1088 : effectsStyle->mBoxShadow->HasShadowWithInset(true);
3156 508 : bool willPaintBorder = aAllowWillPaintBorderOptimization &&
3157 1338 : !isThemed && !hasInsetShadow &&
3158 911 : borderStyle->HasBorder();
3159 :
3160 508 : nsPoint toRef = aBuilder->ToReferenceFrame(aFrame);
3161 :
3162 : // An auxiliary list is necessary in case we have background blending; if that
3163 : // is the case, background items need to be wrapped by a blend container to
3164 : // isolate blending to the background
3165 1016 : nsDisplayList bgItemList;
3166 : // Even if we don't actually have a background color to paint, we may still need
3167 : // to create an item for hit testing.
3168 850 : if ((drawBackgroundColor && color != NS_RGBA(0,0,0,0)) ||
3169 342 : aBuilder->IsForEventDelivery()) {
3170 584 : DisplayListClipState::AutoSaveRestore clipState(aBuilder);
3171 292 : if (bg && !aBuilder->IsForEventDelivery()) {
3172 : // Disable the will-paint-border optimization for background
3173 : // colors with no border-radius. Enabling it for background colors
3174 : // doesn't help much (there are no tiling issues) and clipping the
3175 : // background breaks detection of the element's border-box being
3176 : // opaque. For nonzero border-radius we still need it because we
3177 : // want to inset the background if possible to avoid antialiasing
3178 : // artifacts along the rounded corners.
3179 264 : bool useWillPaintBorderOptimization = willPaintBorder &&
3180 264 : nsLayoutUtils::HasNonZeroCorner(borderStyle->mBorderRadius);
3181 157 : SetBackgroundClipRegion(clipState, aFrame, toRef,
3182 : bg->BottomLayer(), bgRect,
3183 157 : useWillPaintBorderOptimization);
3184 : }
3185 292 : if (aSecondaryReferenceFrame) {
3186 : bgItemList.AppendNewToTop(
3187 : new (aBuilder) nsDisplayTableBackgroundColor(aBuilder, aSecondaryReferenceFrame, bgRect, bg,
3188 : drawBackgroundColor ? color : NS_RGBA(0, 0, 0, 0),
3189 0 : aFrame));
3190 : } else {
3191 : bgItemList.AppendNewToTop(
3192 : new (aBuilder) nsDisplayBackgroundColor(aBuilder, aFrame, bgRect, bg,
3193 292 : drawBackgroundColor ? color : NS_RGBA(0, 0, 0, 0)));
3194 : }
3195 : }
3196 :
3197 508 : if (isThemed) {
3198 81 : nsITheme* theme = presContext->GetTheme();
3199 162 : if (theme->NeedToClearBackgroundBehindWidget(aFrame, aFrame->StyleDisplay()->mAppearance) &&
3200 81 : aBuilder->IsInChromeDocumentOrPopup() && !aBuilder->IsInTransform()) {
3201 : bgItemList.AppendNewToTop(
3202 0 : new (aBuilder) nsDisplayClearBackground(aBuilder, aFrame));
3203 : }
3204 : nsDisplayThemedBackground* bgItem =
3205 81 : new (aBuilder) nsDisplayThemedBackground(aBuilder, aFrame, bgRect);
3206 81 : bgItemList.AppendNewToTop(bgItem);
3207 81 : aList->AppendToTop(&bgItemList);
3208 81 : return true;
3209 : }
3210 :
3211 427 : if (!bg) {
3212 0 : aList->AppendToTop(&bgItemList);
3213 0 : return false;
3214 : }
3215 :
3216 : const ActiveScrolledRoot* asr =
3217 427 : aBuilder->CurrentActiveScrolledRoot();
3218 :
3219 427 : bool needBlendContainer = false;
3220 :
3221 : // Passing bg == nullptr in this macro will result in one iteration with
3222 : // i = 0.
3223 902 : NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, bg->mImage) {
3224 475 : if (bg->mImage.mLayers[i].mImage.IsEmpty()) {
3225 281 : continue;
3226 : }
3227 :
3228 194 : if (bg->mImage.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
3229 0 : needBlendContainer = true;
3230 : }
3231 :
3232 388 : DisplayListClipState::AutoSaveRestore clipState(aBuilder);
3233 194 : if (!aBuilder->IsForEventDelivery()) {
3234 194 : const nsStyleImageLayers::Layer& layer = bg->mImage.mLayers[i];
3235 194 : SetBackgroundClipRegion(clipState, aFrame, toRef,
3236 194 : layer, bgRect, willPaintBorder);
3237 : }
3238 :
3239 388 : nsDisplayList thisItemList;
3240 : nsDisplayBackgroundImage::InitData bgData =
3241 : nsDisplayBackgroundImage::GetInitData(aBuilder, aFrame, i, bgOriginRect, bg,
3242 388 : LayerizeFixed::DO_NOT_LAYERIZE_FIXED_BACKGROUND_IF_AVOIDING_COMPONENT_ALPHA_LAYERS);
3243 :
3244 194 : if (bgData.shouldFixToViewport) {
3245 :
3246 0 : auto* displayData = aBuilder->GetCurrentFixedBackgroundDisplayData();
3247 : nsDisplayListBuilder::AutoBuildingDisplayList
3248 0 : buildingDisplayList(aBuilder, aFrame, aBuilder->GetDirtyRect(), false);
3249 :
3250 0 : nsDisplayListBuilder::AutoCurrentActiveScrolledRootSetter asrSetter(aBuilder);
3251 0 : if (displayData) {
3252 0 : asrSetter.SetCurrentActiveScrolledRoot(
3253 0 : displayData->mContainingBlockActiveScrolledRoot);
3254 0 : if (nsLayoutUtils::UsesAsyncScrolling(aFrame)) {
3255 : // Override the dirty rect on the builder to be the dirty rect of
3256 : // the viewport.
3257 : // displayData->mDirtyRect is relative to the presshell's viewport
3258 : // frame (the root frame), and we need it to be relative to aFrame.
3259 0 : nsIFrame* rootFrame = aBuilder->CurrentPresShellState()->mPresShell->GetRootFrame();
3260 : // There cannot be any transforms between aFrame and rootFrame
3261 : // because then bgData.shouldFixToViewport would have been false.
3262 0 : nsRect dirtyRect = displayData->mDirtyRect + aFrame->GetOffsetTo(rootFrame);
3263 0 : buildingDisplayList.SetDirtyRect(dirtyRect);
3264 : }
3265 : }
3266 0 : nsDisplayBackgroundImage* bgItem = nullptr;
3267 : {
3268 : // The clip is captured by the nsDisplayFixedPosition, so clear the
3269 : // clip for the nsDisplayBackgroundImage inside.
3270 0 : DisplayListClipState::AutoSaveRestore bgImageClip(aBuilder);
3271 0 : bgImageClip.Clear();
3272 0 : if (aSecondaryReferenceFrame) {
3273 0 : bgItem = new (aBuilder) nsDisplayTableBackgroundImage(bgData,
3274 0 : aSecondaryReferenceFrame);
3275 : } else {
3276 0 : bgItem = new (aBuilder) nsDisplayBackgroundImage(bgData);
3277 : }
3278 : }
3279 0 : if (aSecondaryReferenceFrame) {
3280 : thisItemList.AppendNewToTop(
3281 0 : nsDisplayTableFixedPosition::CreateForFixedBackground(aBuilder,
3282 : aSecondaryReferenceFrame,
3283 : bgItem,
3284 : i,
3285 0 : aFrame));
3286 : } else {
3287 : thisItemList.AppendNewToTop(
3288 0 : nsDisplayFixedPosition::CreateForFixedBackground(aBuilder, aFrame, bgItem, i));
3289 : }
3290 :
3291 : } else {
3292 194 : if (aSecondaryReferenceFrame) {
3293 : thisItemList.AppendNewToTop(
3294 : new (aBuilder) nsDisplayTableBackgroundImage(bgData,
3295 0 : aSecondaryReferenceFrame));
3296 : } else {
3297 194 : thisItemList.AppendNewToTop(new (aBuilder) nsDisplayBackgroundImage(bgData));
3298 : }
3299 : }
3300 :
3301 194 : if (bg->mImage.mLayers[i].mBlendMode != NS_STYLE_BLEND_NORMAL) {
3302 0 : DisplayListClipState::AutoSaveRestore blendClip(aBuilder);
3303 0 : blendClip.ClearUpToASR(asr);
3304 : // asr is scrolled. Even if we wrap a fixed background layer, that's
3305 : // fine, because the item will have a scrolled clip that limits the
3306 : // item with respect to asr.
3307 : thisItemList.AppendNewToTop(
3308 : new (aBuilder) nsDisplayBlendMode(aBuilder, aFrame, &thisItemList,
3309 0 : bg->mImage.mLayers[i].mBlendMode,
3310 0 : asr, i + 1));
3311 : }
3312 194 : bgItemList.AppendToTop(&thisItemList);
3313 : }
3314 :
3315 427 : if (needBlendContainer) {
3316 0 : DisplayListClipState::AutoSaveRestore blendContainerClip(aBuilder);
3317 0 : blendContainerClip.ClearUpToASR(asr);
3318 : bgItemList.AppendNewToTop(
3319 0 : nsDisplayBlendContainer::CreateForBackgroundBlendMode(aBuilder, aFrame, &bgItemList, asr));
3320 : }
3321 :
3322 427 : aList->AppendToTop(&bgItemList);
3323 427 : return false;
3324 : }
3325 :
3326 : // Check that the rounded border of aFrame, added to aToReferenceFrame,
3327 : // intersects aRect. Assumes that the unrounded border has already
3328 : // been checked for intersection.
3329 : static bool
3330 135 : RoundedBorderIntersectsRect(nsIFrame* aFrame,
3331 : const nsPoint& aFrameToReferenceFrame,
3332 : const nsRect& aTestRect)
3333 : {
3334 135 : if (!nsRect(aFrameToReferenceFrame, aFrame->GetSize()).Intersects(aTestRect))
3335 0 : return false;
3336 :
3337 : nscoord radii[8];
3338 135 : return !aFrame->GetBorderRadii(radii) ||
3339 135 : nsLayoutUtils::RoundedRectIntersectsRect(nsRect(aFrameToReferenceFrame,
3340 135 : aFrame->GetSize()),
3341 270 : radii, aTestRect);
3342 : }
3343 :
3344 : // Returns TRUE if aContainedRect is guaranteed to be contained in
3345 : // the rounded rect defined by aRoundedRect and aRadii. Complex cases are
3346 : // handled conservatively by returning FALSE in some situations where
3347 : // a more thorough analysis could return TRUE.
3348 : //
3349 : // See also RoundedRectIntersectsRect.
3350 0 : static bool RoundedRectContainsRect(const nsRect& aRoundedRect,
3351 : const nscoord aRadii[8],
3352 : const nsRect& aContainedRect) {
3353 0 : nsRegion rgn = nsLayoutUtils::RoundedRectIntersectRect(aRoundedRect, aRadii, aContainedRect);
3354 0 : return rgn.Contains(aContainedRect);
3355 : }
3356 :
3357 : bool
3358 0 : nsDisplayBackgroundImage::CanOptimizeToImageLayer(LayerManager* aManager,
3359 : nsDisplayListBuilder* aBuilder)
3360 : {
3361 0 : if (!mBackgroundStyle) {
3362 0 : return false;
3363 : }
3364 :
3365 : // We currently can't handle tiled backgrounds.
3366 0 : if (!mDestRect.Contains(mFillRect)) {
3367 0 : return false;
3368 : }
3369 :
3370 : // For 'contain' and 'cover', we allow any pixel of the image to be sampled
3371 : // because there isn't going to be any spriting/atlasing going on.
3372 0 : const nsStyleImageLayers::Layer &layer = mBackgroundStyle->mImage.mLayers[mLayer];
3373 : bool allowPartialImages =
3374 0 : (layer.mSize.mWidthType == nsStyleImageLayers::Size::eContain ||
3375 0 : layer.mSize.mWidthType == nsStyleImageLayers::Size::eCover);
3376 0 : if (!allowPartialImages && !mFillRect.Contains(mDestRect)) {
3377 0 : return false;
3378 : }
3379 :
3380 0 : return nsDisplayImageContainer::CanOptimizeToImageLayer(aManager, aBuilder);
3381 : }
3382 :
3383 : nsRect
3384 16 : nsDisplayBackgroundImage::GetDestRect()
3385 : {
3386 16 : return mDestRect;
3387 : }
3388 :
3389 : already_AddRefed<imgIContainer>
3390 0 : nsDisplayBackgroundImage::GetImage()
3391 : {
3392 0 : nsCOMPtr<imgIContainer> image = mImage;
3393 0 : return image.forget();
3394 : }
3395 :
3396 : nsDisplayBackgroundImage::ImageLayerization
3397 198 : nsDisplayBackgroundImage::ShouldCreateOwnLayer(nsDisplayListBuilder* aBuilder,
3398 : LayerManager* aManager)
3399 : {
3400 198 : if (ForceActiveLayers()) {
3401 0 : return WHENEVER_POSSIBLE;
3402 : }
3403 :
3404 198 : nsIFrame* backgroundStyleFrame = nsCSSRendering::FindBackgroundStyleFrame(StyleFrame());
3405 198 : if (ActiveLayerTracker::IsBackgroundPositionAnimated(aBuilder,
3406 : backgroundStyleFrame)) {
3407 0 : return WHENEVER_POSSIBLE;
3408 : }
3409 :
3410 198 : if (nsLayoutUtils::AnimatedImageLayersEnabled() && mBackgroundStyle) {
3411 0 : const nsStyleImageLayers::Layer &layer = mBackgroundStyle->mImage.mLayers[mLayer];
3412 0 : const nsStyleImage* image = &layer.mImage;
3413 0 : if (image->GetType() == eStyleImageType_Image) {
3414 0 : imgIRequest* imgreq = image->GetImageData();
3415 0 : nsCOMPtr<imgIContainer> image;
3416 0 : if (imgreq &&
3417 0 : NS_SUCCEEDED(imgreq->GetImage(getter_AddRefs(image))) &&
3418 0 : image) {
3419 0 : bool animated = false;
3420 0 : if (NS_SUCCEEDED(image->GetAnimated(&animated)) && animated) {
3421 0 : return WHENEVER_POSSIBLE;
3422 : }
3423 : }
3424 : }
3425 : }
3426 :
3427 198 : if (nsLayoutUtils::GPUImageScalingEnabled() &&
3428 0 : aManager->IsCompositingCheap()) {
3429 0 : return ONLY_FOR_SCALING;
3430 : }
3431 :
3432 198 : return NO_LAYER_NEEDED;
3433 : }
3434 :
3435 198 : static void CheckForBorderItem(nsDisplayItem *aItem, uint32_t& aFlags)
3436 : {
3437 198 : nsDisplayItem* nextItem = aItem->GetAbove();
3438 198 : while (nextItem && nextItem->GetType() == nsDisplayItem::TYPE_BACKGROUND) {
3439 0 : nextItem = nextItem->GetAbove();
3440 : }
3441 198 : if (nextItem &&
3442 198 : nextItem->Frame() == aItem->Frame() &&
3443 0 : nextItem->GetType() == nsDisplayItem::TYPE_BORDER) {
3444 0 : aFlags |= nsCSSRendering::PAINTBG_WILL_PAINT_BORDER;
3445 : }
3446 198 : }
3447 :
3448 : LayerState
3449 198 : nsDisplayBackgroundImage::GetLayerState(nsDisplayListBuilder* aBuilder,
3450 : LayerManager* aManager,
3451 : const ContainerLayerParameters& aParameters)
3452 : {
3453 198 : mImageFlags = aBuilder->GetBackgroundPaintFlags();
3454 198 : CheckForBorderItem(this, mImageFlags);
3455 :
3456 198 : if (ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowBackgroundImage) &&
3457 0 : CanBuildWebRenderDisplayItems(aManager)) {
3458 0 : return LAYER_ACTIVE;
3459 : }
3460 :
3461 198 : ImageLayerization shouldLayerize = ShouldCreateOwnLayer(aBuilder, aManager);
3462 198 : if (shouldLayerize == NO_LAYER_NEEDED) {
3463 : // We can skip the call to CanOptimizeToImageLayer if we don't want a
3464 : // layer anyway.
3465 198 : return LAYER_NONE;
3466 : }
3467 :
3468 0 : if (CanOptimizeToImageLayer(aManager, aBuilder)) {
3469 0 : if (shouldLayerize == WHENEVER_POSSIBLE) {
3470 0 : return LAYER_ACTIVE;
3471 : }
3472 :
3473 0 : MOZ_ASSERT(shouldLayerize == ONLY_FOR_SCALING, "unhandled ImageLayerization value?");
3474 :
3475 0 : MOZ_ASSERT(mImage);
3476 : int32_t imageWidth;
3477 : int32_t imageHeight;
3478 0 : mImage->GetWidth(&imageWidth);
3479 0 : mImage->GetHeight(&imageHeight);
3480 0 : NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!");
3481 :
3482 0 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
3483 0 : LayoutDeviceRect destRect = LayoutDeviceRect::FromAppUnits(GetDestRect(), appUnitsPerDevPixel);
3484 :
3485 0 : const LayerRect destLayerRect = destRect * aParameters.Scale();
3486 :
3487 : // Calculate the scaling factor for the frame.
3488 0 : const gfxSize scale = gfxSize(destLayerRect.width / imageWidth,
3489 0 : destLayerRect.height / imageHeight);
3490 :
3491 0 : if ((scale.width != 1.0f || scale.height != 1.0f) &&
3492 0 : (destLayerRect.width * destLayerRect.height >= 64 * 64)) {
3493 : // Separate this image into a layer.
3494 : // There's no point in doing this if we are not scaling at all or if the
3495 : // target size is pretty small.
3496 0 : return LAYER_ACTIVE;
3497 : }
3498 : }
3499 :
3500 0 : return LAYER_NONE;
3501 : }
3502 :
3503 : already_AddRefed<Layer>
3504 0 : nsDisplayBackgroundImage::BuildLayer(nsDisplayListBuilder* aBuilder,
3505 : LayerManager* aManager,
3506 : const ContainerLayerParameters& aParameters)
3507 : {
3508 0 : if (ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowBackgroundImage)) {
3509 0 : return BuildDisplayItemLayer(aBuilder, aManager, aParameters);
3510 : }
3511 :
3512 : RefPtr<ImageLayer> layer = static_cast<ImageLayer*>
3513 0 : (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
3514 0 : if (!layer) {
3515 0 : layer = aManager->CreateImageLayer();
3516 0 : if (!layer)
3517 0 : return nullptr;
3518 : }
3519 0 : RefPtr<ImageContainer> imageContainer = GetContainer(aManager, aBuilder);
3520 0 : layer->SetContainer(imageContainer);
3521 0 : ConfigureLayer(layer, aParameters);
3522 0 : return layer.forget();
3523 : }
3524 :
3525 : bool
3526 0 : nsDisplayBackgroundImage::CanBuildWebRenderDisplayItems(LayerManager* aManager)
3527 : {
3528 0 : return mBackgroundStyle->mImage.mLayers[mLayer].mClip != StyleGeometryBox::Text &&
3529 0 : nsCSSRendering::CanBuildWebRenderDisplayItemsForStyleImageLayer(aManager,
3530 0 : *StyleFrame()->PresContext(),
3531 0 : StyleFrame(),
3532 : mBackgroundStyle,
3533 0 : mLayer);
3534 : }
3535 :
3536 : bool
3537 0 : nsDisplayBackgroundImage::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
3538 : const StackingContextHelper& aSc,
3539 : nsTArray<WebRenderParentCommand>& aParentCommands,
3540 : WebRenderLayerManager* aManager,
3541 : nsDisplayListBuilder* aDisplayListBuilder)
3542 : {
3543 0 : if (!CanBuildWebRenderDisplayItems(aManager)) {
3544 0 : return false;
3545 : }
3546 :
3547 0 : if (aDisplayListBuilder) {
3548 0 : mImageFlags = aDisplayListBuilder->GetBackgroundPaintFlags();
3549 : }
3550 0 : CheckForBorderItem(this, mImageFlags);
3551 : nsCSSRendering::PaintBGParams params =
3552 0 : nsCSSRendering::PaintBGParams::ForSingleLayer(*StyleFrame()->PresContext(),
3553 : mVisibleRect, mBackgroundRect,
3554 0 : StyleFrame(), mImageFlags, mLayer,
3555 0 : CompositionOp::OP_OVER);
3556 0 : params.bgClipRect = &mBounds;
3557 : DrawResult result =
3558 0 : nsCSSRendering::BuildWebRenderDisplayItemsForStyleImageLayer(params, aBuilder, aSc, aParentCommands, nullptr, aManager, this);
3559 0 : nsDisplayBackgroundGeometry::UpdateDrawResult(this, result);
3560 :
3561 0 : return true;
3562 : }
3563 :
3564 : void
3565 0 : nsDisplayBackgroundImage::HitTest(nsDisplayListBuilder* aBuilder,
3566 : const nsRect& aRect,
3567 : HitTestState* aState,
3568 : nsTArray<nsIFrame*> *aOutFrames)
3569 : {
3570 0 : if (RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
3571 0 : aOutFrames->AppendElement(mFrame);
3572 : }
3573 0 : }
3574 :
3575 : bool
3576 130 : nsDisplayBackgroundImage::ComputeVisibility(nsDisplayListBuilder* aBuilder,
3577 : nsRegion* aVisibleRegion)
3578 : {
3579 130 : if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion)) {
3580 74 : return false;
3581 : }
3582 :
3583 : // Return false if the background was propagated away from this
3584 : // frame. We don't want this display item to show up and confuse
3585 : // anything.
3586 56 : return mBackgroundStyle;
3587 : }
3588 :
3589 : /* static */ nsRegion
3590 169 : nsDisplayBackgroundImage::GetInsideClipRegion(nsDisplayItem* aItem,
3591 : StyleGeometryBox aClip,
3592 : const nsRect& aRect,
3593 : const nsRect& aBackgroundRect)
3594 : {
3595 338 : nsRegion result;
3596 169 : if (aRect.IsEmpty())
3597 0 : return result;
3598 :
3599 169 : nsIFrame *frame = aItem->Frame();
3600 :
3601 338 : nsRect clipRect = aBackgroundRect;
3602 169 : if (frame->IsCanvasFrame()) {
3603 0 : nsCanvasFrame* canvasFrame = static_cast<nsCanvasFrame*>(frame);
3604 0 : clipRect = canvasFrame->CanvasArea() + aItem->ToReferenceFrame();
3605 169 : } else if (aClip == StyleGeometryBox::PaddingBox ||
3606 : aClip == StyleGeometryBox::ContentBox) {
3607 125 : nsMargin border = frame->GetUsedBorder();
3608 125 : if (aClip == StyleGeometryBox::ContentBox) {
3609 91 : border += frame->GetUsedPadding();
3610 : }
3611 125 : border.ApplySkipSides(frame->GetSkipSides());
3612 125 : clipRect.Deflate(border);
3613 : }
3614 :
3615 169 : return clipRect.Intersect(aRect);
3616 : }
3617 :
3618 : nsRegion
3619 250 : nsDisplayBackgroundImage::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
3620 : bool* aSnap) {
3621 250 : nsRegion result;
3622 250 : *aSnap = false;
3623 :
3624 250 : if (!mBackgroundStyle)
3625 0 : return result;
3626 :
3627 250 : *aSnap = true;
3628 :
3629 : // For StyleBoxDecorationBreak::Slice, don't try to optimize here, since
3630 : // this could easily lead to O(N^2) behavior inside InlineBackgroundData,
3631 : // which expects frames to be sent to it in content order, not reverse
3632 : // content order which we'll produce here.
3633 : // Of course, if there's only one frame in the flow, it doesn't matter.
3634 500 : if (mFrame->StyleBorder()->mBoxDecorationBreak ==
3635 750 : StyleBoxDecorationBreak::Clone ||
3636 500 : (!mFrame->GetPrevContinuation() && !mFrame->GetNextContinuation())) {
3637 250 : const nsStyleImageLayers::Layer& layer = mBackgroundStyle->mImage.mLayers[mLayer];
3638 500 : if (layer.mImage.IsOpaque() && layer.mBlendMode == NS_STYLE_BLEND_NORMAL &&
3639 0 : layer.mRepeat.mXRepeat != StyleImageLayerRepeat::Space &&
3640 250 : layer.mRepeat.mYRepeat != StyleImageLayerRepeat::Space &&
3641 0 : layer.mClip != StyleGeometryBox::Text) {
3642 0 : result = GetInsideClipRegion(this, layer.mClip, mBounds, mBackgroundRect);
3643 : }
3644 : }
3645 :
3646 250 : return result;
3647 : }
3648 :
3649 : Maybe<nscolor>
3650 2 : nsDisplayBackgroundImage::IsUniform(nsDisplayListBuilder* aBuilder) {
3651 2 : if (!mBackgroundStyle) {
3652 0 : return Some(NS_RGBA(0,0,0,0));
3653 : }
3654 2 : return Nothing();
3655 : }
3656 :
3657 : nsRect
3658 193 : nsDisplayBackgroundImage::GetPositioningArea()
3659 : {
3660 193 : if (!mBackgroundStyle) {
3661 0 : return nsRect();
3662 : }
3663 : nsIFrame* attachedToFrame;
3664 : bool transformedFixed;
3665 772 : return nsCSSRendering::ComputeImageLayerPositioningArea(
3666 193 : mFrame->PresContext(), mFrame,
3667 : mBackgroundRect,
3668 386 : mBackgroundStyle->mImage.mLayers[mLayer],
3669 : &attachedToFrame,
3670 386 : &transformedFixed) + ToReferenceFrame();
3671 : }
3672 :
3673 : bool
3674 1 : nsDisplayBackgroundImage::RenderingMightDependOnPositioningAreaSizeChange()
3675 : {
3676 1 : if (!mBackgroundStyle)
3677 0 : return false;
3678 :
3679 : nscoord radii[8];
3680 1 : if (mFrame->GetBorderRadii(radii)) {
3681 : // A change in the size of the positioning area might change the position
3682 : // of the rounded corners.
3683 0 : return true;
3684 : }
3685 :
3686 1 : const nsStyleImageLayers::Layer &layer = mBackgroundStyle->mImage.mLayers[mLayer];
3687 1 : if (layer.RenderingMightDependOnPositioningAreaSizeChange()) {
3688 1 : return true;
3689 : }
3690 0 : return false;
3691 : }
3692 :
3693 : void
3694 56 : nsDisplayBackgroundImage::Paint(nsDisplayListBuilder* aBuilder,
3695 : gfxContext* aCtx) {
3696 56 : PaintInternal(aBuilder, aCtx, mVisibleRect, &mBounds);
3697 56 : }
3698 :
3699 : void
3700 56 : nsDisplayBackgroundImage::PaintInternal(nsDisplayListBuilder* aBuilder,
3701 : gfxContext* aCtx, const nsRect& aBounds,
3702 : nsRect* aClipRect) {
3703 56 : gfxContext* ctx = aCtx;
3704 56 : StyleGeometryBox clip = mBackgroundStyle->mImage.mLayers[mLayer].mClip;
3705 :
3706 56 : if (clip == StyleGeometryBox::Text) {
3707 0 : if (!GenerateAndPushTextMask(StyleFrame(), aCtx, mBackgroundRect, aBuilder)) {
3708 0 : return;
3709 : }
3710 : }
3711 :
3712 : nsCSSRendering::PaintBGParams params =
3713 56 : nsCSSRendering::PaintBGParams::ForSingleLayer(*StyleFrame()->PresContext(),
3714 : aBounds, mBackgroundRect,
3715 112 : StyleFrame(), mImageFlags, mLayer,
3716 224 : CompositionOp::OP_OVER);
3717 56 : params.bgClipRect = aClipRect;
3718 56 : DrawResult result = nsCSSRendering::PaintStyleImageLayer(params, *aCtx);
3719 :
3720 56 : if (clip == StyleGeometryBox::Text) {
3721 0 : ctx->PopGroupAndBlend();
3722 : }
3723 :
3724 56 : nsDisplayBackgroundGeometry::UpdateDrawResult(this, result);
3725 : }
3726 :
3727 177 : void nsDisplayBackgroundImage::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
3728 : const nsDisplayItemGeometry* aGeometry,
3729 : nsRegion* aInvalidRegion)
3730 : {
3731 177 : if (!mBackgroundStyle) {
3732 1 : return;
3733 : }
3734 :
3735 177 : const nsDisplayBackgroundGeometry* geometry = static_cast<const nsDisplayBackgroundGeometry*>(aGeometry);
3736 :
3737 : bool snap;
3738 353 : nsRect bounds = GetBounds(aBuilder, &snap);
3739 353 : nsRect positioningArea = GetPositioningArea();
3740 886 : if (positioningArea.TopLeft() != geometry->mPositioningArea.TopLeft() ||
3741 709 : (positioningArea.Size() != geometry->mPositioningArea.Size() &&
3742 1 : RenderingMightDependOnPositioningAreaSizeChange())) {
3743 : // Positioning area changed in a way that could cause everything to change,
3744 : // so invalidate everything (both old and new painting areas).
3745 1 : aInvalidRegion->Or(bounds, geometry->mBounds);
3746 :
3747 1 : if (positioningArea.Size() != geometry->mPositioningArea.Size()) {
3748 1 : NotifyRenderingChanged();
3749 : }
3750 1 : return;
3751 : }
3752 176 : if (!mDestRect.IsEqualInterior(geometry->mDestRect)) {
3753 : // Dest area changed in a way that could cause everything to change,
3754 : // so invalidate everything (both old and new painting areas).
3755 0 : aInvalidRegion->Or(bounds, geometry->mBounds);
3756 0 : NotifyRenderingChanged();
3757 0 : return;
3758 : }
3759 176 : if (aBuilder->ShouldSyncDecodeImages()) {
3760 0 : const nsStyleImage& image = mBackgroundStyle->mImage.mLayers[mLayer].mImage;
3761 0 : if (image.GetType() == eStyleImageType_Image &&
3762 0 : geometry->ShouldInvalidateToSyncDecodeImages()) {
3763 0 : aInvalidRegion->Or(*aInvalidRegion, bounds);
3764 :
3765 0 : NotifyRenderingChanged();
3766 : }
3767 : }
3768 176 : if (!bounds.IsEqualInterior(geometry->mBounds)) {
3769 : // Positioning area is unchanged, so invalidate just the change in the
3770 : // painting area.
3771 0 : aInvalidRegion->Xor(bounds, geometry->mBounds);
3772 :
3773 0 : NotifyRenderingChanged();
3774 : }
3775 : }
3776 :
3777 : nsRect
3778 766 : nsDisplayBackgroundImage::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
3779 766 : *aSnap = true;
3780 766 : return mBounds;
3781 : }
3782 :
3783 : nsRect
3784 194 : nsDisplayBackgroundImage::GetBoundsInternal(nsDisplayListBuilder* aBuilder) {
3785 194 : nsPresContext* presContext = mFrame->PresContext();
3786 :
3787 194 : if (!mBackgroundStyle) {
3788 0 : return nsRect();
3789 : }
3790 :
3791 388 : nsRect clipRect = mBackgroundRect;
3792 194 : if (mFrame->IsCanvasFrame()) {
3793 0 : nsCanvasFrame* frame = static_cast<nsCanvasFrame*>(mFrame);
3794 0 : clipRect = frame->CanvasArea() + ToReferenceFrame();
3795 : }
3796 194 : const nsStyleImageLayers::Layer& layer = mBackgroundStyle->mImage.mLayers[mLayer];
3797 : return nsCSSRendering::GetBackgroundLayerRect(presContext, mFrame,
3798 : mBackgroundRect, clipRect, layer,
3799 194 : aBuilder->GetBackgroundPaintFlags());
3800 : }
3801 :
3802 : uint32_t
3803 758 : nsDisplayBackgroundImage::GetPerFrameKey()
3804 : {
3805 758 : return (mLayer << nsDisplayItem::TYPE_BITS) |
3806 758 : nsDisplayItem::GetPerFrameKey();
3807 : }
3808 :
3809 0 : nsDisplayTableBackgroundImage::nsDisplayTableBackgroundImage(const InitData& aData,
3810 0 : nsIFrame* aCellFrame)
3811 : : nsDisplayBackgroundImage(aData)
3812 0 : , mStyleFrame(aData.frame)
3813 0 : , mTableType(GetTableTypeFromFrame(mStyleFrame))
3814 : {
3815 0 : mFrame = aCellFrame;
3816 0 : }
3817 :
3818 : bool
3819 0 : nsDisplayTableBackgroundImage::IsInvalid(nsRect& aRect)
3820 : {
3821 0 : bool result = mStyleFrame ? mStyleFrame->IsInvalid(aRect) : false;
3822 0 : aRect += ToReferenceFrame();
3823 0 : return result;
3824 : }
3825 :
3826 81 : nsDisplayThemedBackground::nsDisplayThemedBackground(nsDisplayListBuilder* aBuilder,
3827 : nsIFrame* aFrame,
3828 81 : const nsRect& aBackgroundRect)
3829 : : nsDisplayItem(aBuilder, aFrame)
3830 81 : , mBackgroundRect(aBackgroundRect)
3831 : {
3832 81 : MOZ_COUNT_CTOR(nsDisplayThemedBackground);
3833 :
3834 81 : const nsStyleDisplay* disp = mFrame->StyleDisplay();
3835 81 : mAppearance = disp->mAppearance;
3836 81 : mFrame->IsThemed(disp, &mThemeTransparency);
3837 :
3838 : // Perform necessary RegisterThemeGeometry
3839 81 : nsITheme* theme = mFrame->PresContext()->GetTheme();
3840 : nsITheme::ThemeGeometryType type =
3841 81 : theme->ThemeGeometryTypeForWidget(mFrame, disp->mAppearance);
3842 81 : if (type != nsITheme::eThemeGeometryTypeUnknown) {
3843 0 : RegisterThemeGeometry(aBuilder, aFrame, type);
3844 : }
3845 :
3846 162 : if (disp->mAppearance == NS_THEME_WIN_BORDERLESS_GLASS ||
3847 81 : disp->mAppearance == NS_THEME_WIN_GLASS) {
3848 0 : aBuilder->SetGlassDisplayItem(this);
3849 : }
3850 :
3851 81 : mBounds = GetBoundsInternal();
3852 81 : }
3853 :
3854 162 : nsDisplayThemedBackground::~nsDisplayThemedBackground()
3855 : {
3856 : #ifdef NS_BUILD_REFCNT_LOGGING
3857 81 : MOZ_COUNT_DTOR(nsDisplayThemedBackground);
3858 : #endif
3859 81 : }
3860 :
3861 : void
3862 0 : nsDisplayThemedBackground::WriteDebugInfo(std::stringstream& aStream)
3863 : {
3864 0 : aStream << " (themed, appearance:" << (int)mAppearance << ")";
3865 0 : }
3866 :
3867 : void
3868 9 : nsDisplayThemedBackground::HitTest(nsDisplayListBuilder* aBuilder,
3869 : const nsRect& aRect,
3870 : HitTestState* aState,
3871 : nsTArray<nsIFrame*> *aOutFrames)
3872 : {
3873 : // Assume that any point in our background rect is a hit.
3874 9 : if (mBackgroundRect.Intersects(aRect)) {
3875 9 : aOutFrames->AppendElement(mFrame);
3876 : }
3877 9 : }
3878 :
3879 : nsRegion
3880 72 : nsDisplayThemedBackground::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
3881 : bool* aSnap) {
3882 72 : nsRegion result;
3883 72 : *aSnap = false;
3884 :
3885 72 : if (mThemeTransparency == nsITheme::eOpaque) {
3886 33 : result = mBackgroundRect;
3887 : }
3888 72 : return result;
3889 : }
3890 :
3891 : Maybe<nscolor>
3892 24 : nsDisplayThemedBackground::IsUniform(nsDisplayListBuilder* aBuilder) {
3893 48 : if (mAppearance == NS_THEME_WIN_BORDERLESS_GLASS ||
3894 24 : mAppearance == NS_THEME_WIN_GLASS) {
3895 0 : return Some(NS_RGBA(0,0,0,0));
3896 : }
3897 24 : return Nothing();
3898 : }
3899 :
3900 : bool
3901 0 : nsDisplayThemedBackground::ProvidesFontSmoothingBackgroundColor(nscolor* aColor)
3902 : {
3903 0 : nsITheme* theme = mFrame->PresContext()->GetTheme();
3904 0 : return theme->WidgetProvidesFontSmoothingBackgroundColor(mFrame, mAppearance, aColor);
3905 : }
3906 :
3907 : nsRect
3908 50 : nsDisplayThemedBackground::GetPositioningArea()
3909 : {
3910 50 : return mBackgroundRect;
3911 : }
3912 :
3913 : void
3914 18 : nsDisplayThemedBackground::Paint(nsDisplayListBuilder* aBuilder,
3915 : gfxContext* aCtx)
3916 : {
3917 18 : PaintInternal(aBuilder, aCtx, mVisibleRect, nullptr);
3918 18 : }
3919 :
3920 :
3921 : void
3922 18 : nsDisplayThemedBackground::PaintInternal(nsDisplayListBuilder* aBuilder,
3923 : gfxContext* aCtx, const nsRect& aBounds,
3924 : nsRect* aClipRect)
3925 : {
3926 : // XXXzw this ignores aClipRect.
3927 18 : nsPresContext* presContext = mFrame->PresContext();
3928 18 : nsITheme *theme = presContext->GetTheme();
3929 36 : nsRect drawing(mBackgroundRect);
3930 18 : theme->GetWidgetOverflow(presContext->DeviceContext(), mFrame, mAppearance,
3931 36 : &drawing);
3932 18 : drawing.IntersectRect(drawing, aBounds);
3933 18 : theme->DrawWidgetBackground(aCtx, mFrame, mAppearance, mBackgroundRect, drawing);
3934 18 : }
3935 :
3936 4 : bool nsDisplayThemedBackground::IsWindowActive()
3937 : {
3938 4 : EventStates docState = mFrame->GetContent()->OwnerDoc()->GetDocumentState();
3939 4 : return !docState.HasState(NS_DOCUMENT_STATE_WINDOW_INACTIVE);
3940 : }
3941 :
3942 46 : void nsDisplayThemedBackground::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
3943 : const nsDisplayItemGeometry* aGeometry,
3944 : nsRegion* aInvalidRegion)
3945 : {
3946 46 : const nsDisplayThemedBackgroundGeometry* geometry = static_cast<const nsDisplayThemedBackgroundGeometry*>(aGeometry);
3947 :
3948 : bool snap;
3949 90 : nsRect bounds = GetBounds(aBuilder, &snap);
3950 90 : nsRect positioningArea = GetPositioningArea();
3951 46 : if (!positioningArea.IsEqualInterior(geometry->mPositioningArea)) {
3952 : // Invalidate everything (both old and new painting areas).
3953 2 : aInvalidRegion->Or(bounds, geometry->mBounds);
3954 2 : return;
3955 : }
3956 44 : if (!bounds.IsEqualInterior(geometry->mBounds)) {
3957 : // Positioning area is unchanged, so invalidate just the change in the
3958 : // painting area.
3959 0 : aInvalidRegion->Xor(bounds, geometry->mBounds);
3960 : }
3961 44 : nsITheme* theme = mFrame->PresContext()->GetTheme();
3962 44 : if (theme->WidgetAppearanceDependsOnWindowFocus(mAppearance) &&
3963 0 : IsWindowActive() != geometry->mWindowIsActive) {
3964 0 : aInvalidRegion->Or(*aInvalidRegion, bounds);
3965 : }
3966 : }
3967 :
3968 : nsRect
3969 267 : nsDisplayThemedBackground::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
3970 267 : *aSnap = true;
3971 267 : return mBounds;
3972 : }
3973 :
3974 : nsRect
3975 81 : nsDisplayThemedBackground::GetBoundsInternal() {
3976 81 : nsPresContext* presContext = mFrame->PresContext();
3977 :
3978 162 : nsRect r = mBackgroundRect - ToReferenceFrame();
3979 81 : presContext->GetTheme()->
3980 81 : GetWidgetOverflow(presContext->DeviceContext(), mFrame,
3981 162 : mFrame->StyleDisplay()->mAppearance, &r);
3982 162 : return r + ToReferenceFrame();
3983 : }
3984 :
3985 : void
3986 0 : nsDisplayImageContainer::ConfigureLayer(ImageLayer* aLayer,
3987 : const ContainerLayerParameters& aParameters)
3988 : {
3989 0 : aLayer->SetSamplingFilter(nsLayoutUtils::GetSamplingFilterForFrame(mFrame));
3990 :
3991 0 : nsCOMPtr<imgIContainer> image = GetImage();
3992 0 : MOZ_ASSERT(image);
3993 : int32_t imageWidth;
3994 : int32_t imageHeight;
3995 0 : image->GetWidth(&imageWidth);
3996 0 : image->GetHeight(&imageHeight);
3997 0 : NS_ASSERTION(imageWidth != 0 && imageHeight != 0, "Invalid image size!");
3998 :
3999 0 : if (imageWidth > 0 && imageHeight > 0) {
4000 : // We're actually using the ImageContainer. Let our frame know that it
4001 : // should consider itself to have painted successfully.
4002 0 : nsDisplayBackgroundGeometry::UpdateDrawResult(this, DrawResult::SUCCESS);
4003 : }
4004 :
4005 : // XXX(seth): Right now we ignore aParameters.Scale() and
4006 : // aParameters.Offset(), because FrameLayerBuilder already applies
4007 : // aParameters.Scale() via the layer's post-transform, and
4008 : // aParameters.Offset() is always zero.
4009 0 : MOZ_ASSERT(aParameters.Offset() == LayerIntPoint(0,0));
4010 :
4011 : // It's possible (for example, due to downscale-during-decode) that the
4012 : // ImageContainer this ImageLayer is holding has a different size from the
4013 : // intrinsic size of the image. For this reason we compute the transform using
4014 : // the ImageContainer's size rather than the image's intrinsic size.
4015 : // XXX(seth): In reality, since the size of the ImageContainer may change
4016 : // asynchronously, this is not enough. Bug 1183378 will provide a more
4017 : // complete fix, but this solution is safe in more cases than simply relying
4018 : // on the intrinsic size.
4019 0 : IntSize containerSize = aLayer->GetContainer()
4020 0 : ? aLayer->GetContainer()->GetCurrentSize()
4021 0 : : IntSize(imageWidth, imageHeight);
4022 :
4023 0 : const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
4024 : const LayoutDeviceRect destRect(
4025 0 : LayoutDeviceIntRect::FromAppUnitsToNearest(GetDestRect(), factor));
4026 :
4027 0 : const LayoutDevicePoint p = destRect.TopLeft();
4028 0 : Matrix transform = Matrix::Translation(p.x, p.y);
4029 0 : transform.PreScale(destRect.width / containerSize.width,
4030 0 : destRect.height / containerSize.height);
4031 0 : aLayer->SetBaseTransform(gfx::Matrix4x4::From2D(transform));
4032 0 : }
4033 :
4034 : already_AddRefed<ImageContainer>
4035 0 : nsDisplayImageContainer::GetContainer(LayerManager* aManager,
4036 : nsDisplayListBuilder *aBuilder)
4037 : {
4038 0 : nsCOMPtr<imgIContainer> image = GetImage();
4039 0 : if (!image) {
4040 0 : MOZ_ASSERT_UNREACHABLE("Must call CanOptimizeToImage() and get true "
4041 : "before calling GetContainer()");
4042 : return nullptr;
4043 : }
4044 :
4045 0 : uint32_t flags = imgIContainer::FLAG_ASYNC_NOTIFY;
4046 0 : if (aBuilder->ShouldSyncDecodeImages()) {
4047 0 : flags |= imgIContainer::FLAG_SYNC_DECODE;
4048 : }
4049 :
4050 0 : return image->GetImageContainer(aManager, flags);
4051 : }
4052 :
4053 : bool
4054 57 : nsDisplayImageContainer::CanOptimizeToImageLayer(LayerManager* aManager,
4055 : nsDisplayListBuilder* aBuilder)
4056 : {
4057 57 : uint32_t flags = aBuilder->ShouldSyncDecodeImages()
4058 57 : ? imgIContainer::FLAG_SYNC_DECODE
4059 57 : : imgIContainer::FLAG_NONE;
4060 :
4061 114 : nsCOMPtr<imgIContainer> image = GetImage();
4062 57 : if (!image) {
4063 3 : return false;
4064 : }
4065 :
4066 54 : if (!image->IsImageContainerAvailable(aManager, flags)) {
4067 43 : return false;
4068 : }
4069 :
4070 : int32_t imageWidth;
4071 : int32_t imageHeight;
4072 11 : image->GetWidth(&imageWidth);
4073 11 : image->GetHeight(&imageHeight);
4074 :
4075 11 : if (imageWidth == 0 || imageHeight == 0) {
4076 0 : NS_ASSERTION(false, "invalid image size");
4077 0 : return false;
4078 : }
4079 :
4080 11 : const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
4081 : const LayoutDeviceRect destRect(
4082 11 : LayoutDeviceIntRect::FromAppUnitsToNearest(GetDestRect(), factor));
4083 :
4084 : // Calculate the scaling factor for the frame.
4085 11 : const gfxSize scale = gfxSize(destRect.width / imageWidth,
4086 22 : destRect.height / imageHeight);
4087 :
4088 11 : if (scale.width < 0.34 || scale.height < 0.34) {
4089 : // This would look awful as long as we can't use high-quality downscaling
4090 : // for image layers (bug 803703), so don't turn this into an image layer.
4091 0 : return false;
4092 : }
4093 :
4094 11 : if (mFrame->IsImageFrame()) {
4095 : // Image layer doesn't support draw focus ring for image map.
4096 0 : nsImageFrame* f = static_cast<nsImageFrame*>(mFrame);
4097 0 : if (f->HasImageMap()) {
4098 0 : return false;
4099 : }
4100 : }
4101 :
4102 11 : return true;
4103 : }
4104 :
4105 : void
4106 0 : nsDisplayBackgroundColor::ApplyOpacity(nsDisplayListBuilder* aBuilder,
4107 : float aOpacity,
4108 : const DisplayItemClipChain* aClip)
4109 : {
4110 0 : NS_ASSERTION(CanApplyOpacity(), "ApplyOpacity should be allowed");
4111 0 : mColor.a = mColor.a * aOpacity;
4112 0 : IntersectClip(aBuilder, aClip);
4113 0 : }
4114 :
4115 : bool
4116 24 : nsDisplayBackgroundColor::CanApplyOpacity() const
4117 : {
4118 24 : return true;
4119 : }
4120 :
4121 : LayerState
4122 209 : nsDisplayBackgroundColor::GetLayerState(nsDisplayListBuilder* aBuilder,
4123 : LayerManager* aManager,
4124 : const ContainerLayerParameters& aParameters)
4125 : {
4126 209 : StyleGeometryBox clip = mBackgroundStyle->mImage.mLayers[0].mClip;
4127 209 : if ((ForceActiveLayers() || ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowBackgroundColorLayers)) &&
4128 : clip != StyleGeometryBox::Text) {
4129 0 : return LAYER_ACTIVE;
4130 : }
4131 209 : return LAYER_NONE;
4132 : }
4133 :
4134 : already_AddRefed<Layer>
4135 0 : nsDisplayBackgroundColor::BuildLayer(nsDisplayListBuilder* aBuilder,
4136 : LayerManager* aManager,
4137 : const ContainerLayerParameters& aContainerParameters)
4138 : {
4139 0 : if (mColor == Color()) {
4140 0 : return nullptr;
4141 : }
4142 :
4143 : RefPtr<ColorLayer> layer = static_cast<ColorLayer*>
4144 0 : (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
4145 0 : if (!layer) {
4146 0 : layer = aManager->CreateColorLayer();
4147 0 : if (!layer)
4148 0 : return nullptr;
4149 : }
4150 0 : layer->SetColor(mColor);
4151 :
4152 0 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
4153 0 : layer->SetBounds(mBackgroundRect.ToNearestPixels(appUnitsPerDevPixel));
4154 0 : layer->SetBaseTransform(gfx::Matrix4x4::Translation(aContainerParameters.mOffset.x,
4155 0 : aContainerParameters.mOffset.y, 0));
4156 :
4157 0 : return layer.forget();
4158 : }
4159 :
4160 : bool
4161 0 : nsDisplayBackgroundColor::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
4162 : const StackingContextHelper& aSc,
4163 : nsTArray<WebRenderParentCommand>& aParentCommands,
4164 : mozilla::layers::WebRenderLayerManager* aManager,
4165 : nsDisplayListBuilder* aDisplayListBuilder)
4166 : {
4167 0 : if (aManager->IsLayersFreeTransaction()) {
4168 0 : ContainerLayerParameters parameter;
4169 0 : if (GetLayerState(aDisplayListBuilder, aManager, parameter) != LAYER_ACTIVE) {
4170 0 : return false;
4171 : }
4172 : }
4173 :
4174 0 : if (mColor == Color()) {
4175 0 : return true;
4176 : }
4177 :
4178 : LayoutDeviceRect bounds = LayoutDeviceRect::FromAppUnits(
4179 0 : mBackgroundRect, mFrame->PresContext()->AppUnitsPerDevPixel());
4180 0 : WrRect transformedRect = aSc.ToRelativeWrRect(bounds);
4181 :
4182 : aBuilder.PushRect(transformedRect,
4183 : transformedRect,
4184 0 : wr::ToWrColor(ToDeviceColor(mColor)));
4185 :
4186 0 : return true;
4187 : }
4188 :
4189 : void
4190 42 : nsDisplayBackgroundColor::Paint(nsDisplayListBuilder* aBuilder,
4191 : gfxContext* aCtx)
4192 : {
4193 42 : if (mColor == Color()) {
4194 0 : return;
4195 : }
4196 :
4197 : #if 0
4198 : // See https://bugzilla.mozilla.org/show_bug.cgi?id=1148418#c21 for why this
4199 : // results in a precision induced rounding issue that makes the rect one
4200 : // pixel shorter in rare cases. Disabled in favor of the old code for now.
4201 : // Note that the pref layout.css.devPixelsPerPx needs to be set to 1 to
4202 : // reproduce the bug.
4203 : //
4204 : // TODO:
4205 : // This new path does not include support for background-clip:text; need to
4206 : // be fixed if/when we switch to this new code path.
4207 :
4208 : DrawTarget& aDrawTarget = *aCtx->GetDrawTarget();
4209 :
4210 : Rect rect = NSRectToSnappedRect(mBackgroundRect,
4211 : mFrame->PresContext()->AppUnitsPerDevPixel(),
4212 : aDrawTarget);
4213 : ColorPattern color(ToDeviceColor(mColor));
4214 : aDrawTarget.FillRect(rect, color);
4215 : #else
4216 42 : gfxContext* ctx = aCtx;
4217 : gfxRect bounds =
4218 : nsLayoutUtils::RectToGfxRect(mBackgroundRect,
4219 42 : mFrame->PresContext()->AppUnitsPerDevPixel());
4220 :
4221 42 : StyleGeometryBox clip = mBackgroundStyle->mImage.mLayers[0].mClip;
4222 42 : if (clip == StyleGeometryBox::Text) {
4223 0 : if (!GenerateAndPushTextMask(mFrame, aCtx, mBackgroundRect, aBuilder)) {
4224 0 : return;
4225 : }
4226 :
4227 0 : ctx->SetColor(mColor);
4228 0 : ctx->Rectangle(bounds, true);
4229 0 : ctx->Fill();
4230 0 : ctx->PopGroupAndBlend();
4231 0 : return;
4232 : }
4233 :
4234 42 : ctx->SetColor(mColor);
4235 42 : ctx->NewPath();
4236 42 : ctx->Rectangle(bounds, true);
4237 42 : ctx->Fill();
4238 : #endif
4239 : }
4240 :
4241 : nsRegion
4242 199 : nsDisplayBackgroundColor::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
4243 : bool* aSnap)
4244 : {
4245 199 : *aSnap = false;
4246 :
4247 199 : if (mColor.a != 1) {
4248 30 : return nsRegion();
4249 : }
4250 :
4251 169 : if (!mBackgroundStyle)
4252 0 : return nsRegion();
4253 :
4254 :
4255 169 : const nsStyleImageLayers::Layer& bottomLayer = mBackgroundStyle->BottomLayer();
4256 169 : if (bottomLayer.mClip == StyleGeometryBox::Text) {
4257 0 : return nsRegion();
4258 : }
4259 :
4260 169 : *aSnap = true;
4261 169 : return nsDisplayBackgroundImage::GetInsideClipRegion(this, bottomLayer.mClip,
4262 338 : mBackgroundRect, mBackgroundRect);
4263 : }
4264 :
4265 : Maybe<nscolor>
4266 61 : nsDisplayBackgroundColor::IsUniform(nsDisplayListBuilder* aBuilder)
4267 : {
4268 61 : return Some(mColor.ToABGR());
4269 : }
4270 :
4271 : void
4272 135 : nsDisplayBackgroundColor::HitTest(nsDisplayListBuilder* aBuilder,
4273 : const nsRect& aRect,
4274 : HitTestState* aState,
4275 : nsTArray<nsIFrame*> *aOutFrames)
4276 : {
4277 135 : if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
4278 : // aRect doesn't intersect our border-radius curve.
4279 0 : return;
4280 : }
4281 :
4282 135 : aOutFrames->AppendElement(mFrame);
4283 : }
4284 :
4285 : void
4286 0 : nsDisplayBackgroundColor::WriteDebugInfo(std::stringstream& aStream)
4287 : {
4288 0 : aStream << " (rgba " << mColor.r << "," << mColor.g << ","
4289 0 : << mColor.b << "," << mColor.a << ")";
4290 0 : }
4291 :
4292 : already_AddRefed<Layer>
4293 0 : nsDisplayClearBackground::BuildLayer(nsDisplayListBuilder* aBuilder,
4294 : LayerManager* aManager,
4295 : const ContainerLayerParameters& aParameters)
4296 : {
4297 : RefPtr<ColorLayer> layer = static_cast<ColorLayer*>
4298 0 : (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
4299 0 : if (!layer) {
4300 0 : layer = aManager->CreateColorLayer();
4301 0 : if (!layer)
4302 0 : return nullptr;
4303 : }
4304 0 : layer->SetColor(Color());
4305 0 : layer->SetMixBlendMode(gfx::CompositionOp::OP_SOURCE);
4306 :
4307 : bool snap;
4308 0 : nsRect bounds = GetBounds(aBuilder, &snap);
4309 0 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
4310 0 : layer->SetBounds(bounds.ToNearestPixels(appUnitsPerDevPixel)); // XXX Do we need to respect the parent layer's scale here?
4311 :
4312 0 : return layer.forget();
4313 : }
4314 :
4315 : nsRect
4316 0 : nsDisplayOutline::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
4317 0 : *aSnap = false;
4318 0 : return mFrame->GetVisualOverflowRectRelativeToSelf() + ToReferenceFrame();
4319 : }
4320 :
4321 : void
4322 0 : nsDisplayOutline::Paint(nsDisplayListBuilder* aBuilder,
4323 : gfxContext* aCtx) {
4324 : // TODO join outlines together
4325 0 : MOZ_ASSERT(mFrame->StyleOutline()->ShouldPaintOutline(),
4326 : "Should have not created a nsDisplayOutline!");
4327 :
4328 0 : nsPoint offset = ToReferenceFrame();
4329 0 : nsCSSRendering::PaintOutline(mFrame->PresContext(), *aCtx, mFrame,
4330 : mVisibleRect,
4331 0 : nsRect(offset, mFrame->GetSize()),
4332 0 : mFrame->StyleContext());
4333 0 : }
4334 :
4335 : LayerState
4336 0 : nsDisplayOutline::GetLayerState(nsDisplayListBuilder* aBuilder,
4337 : LayerManager* aManager,
4338 : const ContainerLayerParameters& aParameters)
4339 : {
4340 0 : if (!ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowOutlineLayers)) {
4341 0 : return LAYER_NONE;
4342 : }
4343 :
4344 0 : uint8_t outlineStyle = mFrame->StyleContext()->StyleOutline()->mOutlineStyle;
4345 0 : if (outlineStyle == NS_STYLE_BORDER_STYLE_AUTO && nsLayoutUtils::IsOutlineStyleAutoEnabled()) {
4346 0 : nsITheme* theme = mFrame->PresContext()->GetTheme();
4347 0 : if (theme && theme->ThemeSupportsWidget(mFrame->PresContext(), mFrame,
4348 0 : NS_THEME_FOCUS_OUTLINE)) {
4349 0 : return LAYER_NONE;
4350 : }
4351 : }
4352 :
4353 0 : nsPoint offset = ToReferenceFrame();
4354 : Maybe<nsCSSBorderRenderer> br =
4355 0 : nsCSSRendering::CreateBorderRendererForOutline(mFrame->PresContext(),
4356 : nullptr, mFrame,
4357 : mVisibleRect,
4358 0 : nsRect(offset, mFrame->GetSize()),
4359 0 : mFrame->StyleContext());
4360 :
4361 0 : if (!br) {
4362 0 : return LAYER_NONE;
4363 : }
4364 :
4365 0 : mBorderRenderer = br;
4366 :
4367 0 : return LAYER_ACTIVE;
4368 : }
4369 :
4370 : already_AddRefed<Layer>
4371 0 : nsDisplayOutline::BuildLayer(nsDisplayListBuilder* aBuilder,
4372 : LayerManager* aManager,
4373 : const ContainerLayerParameters& aContainerParameters)
4374 : {
4375 0 : return BuildDisplayItemLayer(aBuilder, aManager, aContainerParameters);
4376 : }
4377 :
4378 : bool
4379 0 : nsDisplayOutline::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
4380 : const StackingContextHelper& aSc,
4381 : nsTArray<WebRenderParentCommand>& aParentCommands,
4382 : mozilla::layers::WebRenderLayerManager* aManager,
4383 : nsDisplayListBuilder* aDisplayListBuilder)
4384 : {
4385 0 : if (aManager->IsLayersFreeTransaction()) {
4386 0 : ContainerLayerParameters parameter;
4387 0 : if (GetLayerState(aDisplayListBuilder, aManager, parameter) != LAYER_ACTIVE) {
4388 0 : return false;
4389 : }
4390 : }
4391 :
4392 0 : mBorderRenderer->CreateWebRenderCommands(aBuilder, aSc);
4393 0 : return true;
4394 : }
4395 :
4396 : bool
4397 0 : nsDisplayOutline::IsInvisibleInRect(const nsRect& aRect)
4398 : {
4399 0 : const nsStyleOutline* outline = mFrame->StyleOutline();
4400 0 : nsRect borderBox(ToReferenceFrame(), mFrame->GetSize());
4401 0 : if (borderBox.Contains(aRect) &&
4402 0 : !nsLayoutUtils::HasNonZeroCorner(outline->mOutlineRadius)) {
4403 0 : if (outline->mOutlineOffset >= 0) {
4404 : // aRect is entirely inside the border-rect, and the outline isn't
4405 : // rendered inside the border-rect, so the outline is not visible.
4406 0 : return true;
4407 : }
4408 : }
4409 :
4410 0 : return false;
4411 : }
4412 :
4413 : void
4414 0 : nsDisplayEventReceiver::HitTest(nsDisplayListBuilder* aBuilder,
4415 : const nsRect& aRect,
4416 : HitTestState* aState,
4417 : nsTArray<nsIFrame*> *aOutFrames)
4418 : {
4419 0 : if (!RoundedBorderIntersectsRect(mFrame, ToReferenceFrame(), aRect)) {
4420 : // aRect doesn't intersect our border-radius curve.
4421 0 : return;
4422 : }
4423 :
4424 0 : aOutFrames->AppendElement(mFrame);
4425 : }
4426 :
4427 : void
4428 2814 : nsDisplayLayerEventRegions::AddFrame(nsDisplayListBuilder* aBuilder,
4429 : nsIFrame* aFrame)
4430 : {
4431 2814 : NS_ASSERTION(aBuilder->FindReferenceFrameFor(aFrame) == aBuilder->FindReferenceFrameFor(mFrame),
4432 : "Reference frame mismatch");
4433 2814 : if (aBuilder->IsInsidePointerEventsNoneDoc()) {
4434 : // Somewhere up the parent document chain is a subdocument with pointer-
4435 : // events:none set on it.
4436 689 : return;
4437 : }
4438 2814 : if (!aFrame->GetParent()) {
4439 26 : MOZ_ASSERT(aFrame->IsViewportFrame());
4440 : // Viewport frames are never event targets, other frames, like canvas frames,
4441 : // are the event targets for any regions viewport frames may cover.
4442 26 : return;
4443 : }
4444 :
4445 : uint8_t pointerEvents =
4446 2788 : aFrame->StyleUserInterface()->GetEffectivePointerEvents(aFrame);
4447 2788 : if (pointerEvents == NS_STYLE_POINTER_EVENTS_NONE) {
4448 537 : return;
4449 : }
4450 2251 : bool simpleRegions = aFrame->HasAnyStateBits(NS_FRAME_SIMPLE_EVENT_REGIONS);
4451 2251 : if (!simpleRegions) {
4452 565 : if (!aFrame->StyleVisibility()->IsVisible()) {
4453 126 : return;
4454 : }
4455 : }
4456 : // XXX handle other pointerEvents values for SVG
4457 :
4458 : // XXX Do something clever here for the common case where the border box
4459 : // is obviously entirely inside mHitRegion.
4460 4250 : nsRect borderBox;
4461 2125 : if (nsLayoutUtils::GetScrollableFrameFor(aFrame)) {
4462 : // If the frame is content of a scrollframe, then we need to pick up the
4463 : // area corresponding to the overflow rect as well. Otherwise the parts of
4464 : // the overflow that are not occupied by descendants get skipped and the
4465 : // APZ code sends touch events to the content underneath instead.
4466 : // See https://bugzilla.mozilla.org/show_bug.cgi?id=1127773#c15.
4467 133 : borderBox = aFrame->GetScrollableOverflowRect();
4468 : } else {
4469 1992 : borderBox = nsRect(nsPoint(0, 0), aFrame->GetSize());
4470 : }
4471 2125 : borderBox += aBuilder->ToReferenceFrame(aFrame);
4472 :
4473 2125 : bool borderBoxHasRoundedCorners = false;
4474 2125 : if (!simpleRegions) {
4475 439 : if (nsLayoutUtils::HasNonZeroCorner(aFrame->StyleBorder()->mBorderRadius)) {
4476 299 : borderBoxHasRoundedCorners = true;
4477 : } else {
4478 140 : aFrame->AddStateBits(NS_FRAME_SIMPLE_EVENT_REGIONS);
4479 : }
4480 : }
4481 :
4482 4250 : const DisplayItemClip* clip = DisplayItemClipChain::ClipForASR(
4483 2125 : aBuilder->ClipState().GetCurrentCombinedClipChain(aBuilder),
4484 2125 : aBuilder->CurrentActiveScrolledRoot());
4485 2125 : if (clip) {
4486 2051 : borderBox = clip->ApplyNonRoundedIntersection(borderBox);
4487 2051 : if (clip->GetRoundedRectCount() > 0) {
4488 22 : borderBoxHasRoundedCorners = true;
4489 : }
4490 : }
4491 :
4492 3929 : if (borderBoxHasRoundedCorners ||
4493 1804 : (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
4494 321 : mMaybeHitRegion.Or(mMaybeHitRegion, borderBox);
4495 :
4496 : // Avoid quadratic performance as a result of the region growing to include
4497 : // an arbitrarily large number of rects, which can happen on some pages.
4498 321 : mMaybeHitRegion.SimplifyOutward(8);
4499 : } else {
4500 1804 : mHitRegion.Or(mHitRegion, borderBox);
4501 : }
4502 :
4503 4250 : if (aBuilder->IsBuildingNonLayerizedScrollbar() ||
4504 2125 : aBuilder->GetAncestorHasApzAwareEventHandler())
4505 : {
4506 : // Scrollbars may be painted into a layer below the actual layer they will
4507 : // scroll, and therefore wheel events may be dispatched to the outer frame
4508 : // instead of the intended scrollframe. To address this, we force a d-t-c
4509 : // region on scrollbar frames that won't be placed in their own layer. See
4510 : // bug 1213324 for details.
4511 456 : mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox);
4512 456 : mDispatchToContentHitRegion.SimplifyOutward(8);
4513 1669 : } else if (aFrame->IsObjectFrame()) {
4514 : // If the frame is a plugin frame and wants to handle wheel events as
4515 : // default action, we should add the frame to dispatch-to-content region.
4516 0 : nsPluginFrame* pluginFrame = do_QueryFrame(aFrame);
4517 0 : if (pluginFrame && pluginFrame->WantsToHandleWheelEventAsDefaultAction()) {
4518 0 : mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, borderBox);
4519 0 : mDispatchToContentHitRegion.SimplifyOutward(8);
4520 : }
4521 : }
4522 :
4523 : // Touch action region
4524 :
4525 2125 : nsIFrame* touchActionFrame = aFrame;
4526 2125 : nsIScrollableFrame* scrollFrame = nsLayoutUtils::GetScrollableFrameFor(aFrame);
4527 2125 : if (scrollFrame) {
4528 133 : touchActionFrame = do_QueryFrame(scrollFrame);
4529 : }
4530 2125 : uint32_t touchAction = nsLayoutUtils::GetTouchActionFromFrame(touchActionFrame);
4531 2125 : if (touchAction != NS_STYLE_TOUCH_ACTION_AUTO) {
4532 : // If this frame has touch-action areas, and there were already
4533 : // touch-action areas from some other element on this same event regions,
4534 : // then all we know is that there are multiple elements with touch-action
4535 : // properties. In particular, we don't know what the relationship is
4536 : // between those elements in terms of DOM ancestry, and so we don't know
4537 : // how to combine the regions properly. Instead, we just add all the areas
4538 : // to the dispatch-to-content region, so that the APZ knows to check with
4539 : // the main thread. XXX we need to come up with a better way to do this,
4540 : // see bug 1287829.
4541 0 : bool alreadyHadRegions = !mNoActionRegion.IsEmpty() ||
4542 0 : !mHorizontalPanRegion.IsEmpty() ||
4543 0 : !mVerticalPanRegion.IsEmpty();
4544 0 : if (touchAction & NS_STYLE_TOUCH_ACTION_NONE) {
4545 0 : mNoActionRegion.OrWith(borderBox);
4546 : } else {
4547 0 : if ((touchAction & NS_STYLE_TOUCH_ACTION_PAN_X)) {
4548 0 : mHorizontalPanRegion.OrWith(borderBox);
4549 : }
4550 0 : if ((touchAction & NS_STYLE_TOUCH_ACTION_PAN_Y)) {
4551 0 : mVerticalPanRegion.OrWith(borderBox);
4552 : }
4553 : }
4554 0 : if (alreadyHadRegions) {
4555 0 : mDispatchToContentHitRegion.OrWith(CombinedTouchActionRegion());
4556 0 : mDispatchToContentHitRegion.SimplifyOutward(8);
4557 : }
4558 : }
4559 : }
4560 :
4561 : void
4562 0 : nsDisplayLayerEventRegions::AddInactiveScrollPort(const nsRect& aRect)
4563 : {
4564 0 : mHitRegion.Or(mHitRegion, aRect);
4565 0 : mDispatchToContentHitRegion.Or(mDispatchToContentHitRegion, aRect);
4566 0 : mDispatchToContentHitRegion.SimplifyOutward(8);
4567 0 : }
4568 :
4569 : bool
4570 1060 : nsDisplayLayerEventRegions::IsEmpty() const
4571 : {
4572 : // If the hit region and maybe-hit region are empty, then the rest
4573 : // must be empty too.
4574 1060 : if (mHitRegion.IsEmpty() && mMaybeHitRegion.IsEmpty()) {
4575 186 : MOZ_ASSERT(mDispatchToContentHitRegion.IsEmpty());
4576 186 : MOZ_ASSERT(mNoActionRegion.IsEmpty());
4577 186 : MOZ_ASSERT(mHorizontalPanRegion.IsEmpty());
4578 186 : MOZ_ASSERT(mVerticalPanRegion.IsEmpty());
4579 186 : return true;
4580 : }
4581 874 : return false;
4582 : }
4583 :
4584 : nsRegion
4585 0 : nsDisplayLayerEventRegions::CombinedTouchActionRegion()
4586 : {
4587 0 : nsRegion result;
4588 0 : result.Or(mHorizontalPanRegion, mVerticalPanRegion);
4589 0 : result.OrWith(mNoActionRegion);
4590 0 : return result;
4591 : }
4592 :
4593 : int32_t
4594 94 : nsDisplayLayerEventRegions::ZIndex() const
4595 : {
4596 94 : return mOverrideZIndex ? *mOverrideZIndex : nsDisplayItem::ZIndex();
4597 : }
4598 :
4599 : void
4600 0 : nsDisplayLayerEventRegions::SetOverrideZIndex(int32_t aZIndex)
4601 : {
4602 0 : mOverrideZIndex = Some(aZIndex);
4603 0 : }
4604 :
4605 : void
4606 0 : nsDisplayLayerEventRegions::WriteDebugInfo(std::stringstream& aStream)
4607 : {
4608 0 : if (!mHitRegion.IsEmpty()) {
4609 0 : AppendToString(aStream, mHitRegion, " (hitRegion ", ")");
4610 : }
4611 0 : if (!mMaybeHitRegion.IsEmpty()) {
4612 0 : AppendToString(aStream, mMaybeHitRegion, " (maybeHitRegion ", ")");
4613 : }
4614 0 : if (!mDispatchToContentHitRegion.IsEmpty()) {
4615 0 : AppendToString(aStream, mDispatchToContentHitRegion, " (dispatchToContentRegion ", ")");
4616 : }
4617 0 : if (!mNoActionRegion.IsEmpty()) {
4618 0 : AppendToString(aStream, mNoActionRegion, " (noActionRegion ", ")");
4619 : }
4620 0 : if (!mHorizontalPanRegion.IsEmpty()) {
4621 0 : AppendToString(aStream, mHorizontalPanRegion, " (horizPanRegion ", ")");
4622 : }
4623 0 : if (!mVerticalPanRegion.IsEmpty()) {
4624 0 : AppendToString(aStream, mVerticalPanRegion, " (vertPanRegion ", ")");
4625 : }
4626 0 : }
4627 :
4628 0 : nsDisplayCaret::nsDisplayCaret(nsDisplayListBuilder* aBuilder,
4629 0 : nsIFrame* aCaretFrame)
4630 : : nsDisplayItem(aBuilder, aCaretFrame)
4631 : , mCaret(aBuilder->GetCaret())
4632 0 : , mBounds(aBuilder->GetCaretRect() + ToReferenceFrame())
4633 : {
4634 0 : MOZ_COUNT_CTOR(nsDisplayCaret);
4635 0 : }
4636 :
4637 : #ifdef NS_BUILD_REFCNT_LOGGING
4638 0 : nsDisplayCaret::~nsDisplayCaret()
4639 : {
4640 0 : MOZ_COUNT_DTOR(nsDisplayCaret);
4641 0 : }
4642 : #endif
4643 :
4644 : nsRect
4645 0 : nsDisplayCaret::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
4646 : {
4647 0 : *aSnap = true;
4648 : // The caret returns a rect in the coordinates of mFrame.
4649 0 : return mBounds;
4650 : }
4651 :
4652 : void
4653 0 : nsDisplayCaret::Paint(nsDisplayListBuilder* aBuilder,
4654 : gfxContext* aCtx) {
4655 : // Note: Because we exist, we know that the caret is visible, so we don't
4656 : // need to check for the caret's visibility.
4657 0 : mCaret->PaintCaret(*aCtx->GetDrawTarget(), mFrame, ToReferenceFrame());
4658 0 : }
4659 :
4660 : bool
4661 0 : nsDisplayCaret::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
4662 : const StackingContextHelper& aSc,
4663 : nsTArray<WebRenderParentCommand>& aParentCommands,
4664 : mozilla::layers::WebRenderLayerManager* aManager,
4665 : nsDisplayListBuilder* aDisplayListBuilder)
4666 : {
4667 0 : if (aManager->IsLayersFreeTransaction()) {
4668 0 : ContainerLayerParameters parameter;
4669 0 : if (GetLayerState(aDisplayListBuilder, aManager, parameter) != LAYER_ACTIVE) {
4670 0 : return false;
4671 : }
4672 : }
4673 :
4674 : using namespace mozilla::layers;
4675 : int32_t contentOffset;
4676 0 : nsIFrame* frame = mCaret->GetFrame(&contentOffset);
4677 0 : if (!frame) {
4678 0 : return true;
4679 : }
4680 0 : NS_ASSERTION(frame == mFrame, "We're referring different frame");
4681 :
4682 0 : int32_t appUnitsPerDevPixel = frame->PresContext()->AppUnitsPerDevPixel();
4683 :
4684 0 : nsRect caretRect;
4685 0 : nsRect hookRect;
4686 0 : mCaret->ComputeCaretRects(frame, contentOffset, &caretRect, &hookRect);
4687 :
4688 0 : gfx::Color color = ToDeviceColor(frame->GetCaretColorAt(contentOffset));
4689 : LayoutDeviceRect devCaretRect = LayoutDeviceRect::FromAppUnits(
4690 0 : caretRect + ToReferenceFrame(), appUnitsPerDevPixel);
4691 : LayoutDeviceRect devHookRect = LayoutDeviceRect::FromAppUnits(
4692 0 : hookRect + ToReferenceFrame(), appUnitsPerDevPixel);
4693 :
4694 0 : WrRect caret = aSc.ToRelativeWrRectRounded(devCaretRect);
4695 0 : WrRect hook = aSc.ToRelativeWrRectRounded(devHookRect);
4696 :
4697 : // Note, WR will pixel snap anything that is layout aligned.
4698 : aBuilder.PushRect(caret,
4699 : caret,
4700 0 : wr::ToWrColor(color));
4701 :
4702 0 : if (!devHookRect.IsEmpty()) {
4703 : aBuilder.PushRect(hook,
4704 : hook,
4705 0 : wr::ToWrColor(color));
4706 : }
4707 0 : return true;
4708 : }
4709 :
4710 : LayerState
4711 0 : nsDisplayCaret::GetLayerState(nsDisplayListBuilder* aBuilder,
4712 : LayerManager* aManager,
4713 : const ContainerLayerParameters& aParameters)
4714 : {
4715 0 : if (ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowCaretLayers)) {
4716 0 : return LAYER_ACTIVE;
4717 : }
4718 :
4719 0 : return LAYER_NONE;
4720 : }
4721 :
4722 : already_AddRefed<Layer>
4723 0 : nsDisplayCaret::BuildLayer(nsDisplayListBuilder* aBuilder,
4724 : LayerManager* aManager,
4725 : const ContainerLayerParameters& aContainerParameters)
4726 : {
4727 0 : return BuildDisplayItemLayer(aBuilder, aManager, aContainerParameters);
4728 : }
4729 :
4730 179 : nsDisplayBorder::nsDisplayBorder(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
4731 179 : : nsDisplayItem(aBuilder, aFrame)
4732 : {
4733 179 : MOZ_COUNT_CTOR(nsDisplayBorder);
4734 :
4735 179 : mBounds = CalculateBounds(*mFrame->StyleBorder()).GetBounds();
4736 179 : }
4737 :
4738 : bool
4739 38 : nsDisplayBorder::IsInvisibleInRect(const nsRect& aRect)
4740 : {
4741 76 : nsRect paddingRect = mFrame->GetPaddingRect() - mFrame->GetPosition() +
4742 114 : ToReferenceFrame();
4743 : const nsStyleBorder *styleBorder;
4744 82 : if (paddingRect.Contains(aRect) &&
4745 44 : !(styleBorder = mFrame->StyleBorder())->IsBorderImageLoaded() &&
4746 3 : !nsLayoutUtils::HasNonZeroCorner(styleBorder->mBorderRadius)) {
4747 : // aRect is entirely inside the content rect, and no part
4748 : // of the border is rendered inside the content rect, so we are not
4749 : // visible
4750 : // Skip this if there's a border-image (which draws a background
4751 : // too) or if there is a border-radius (which makes the border draw
4752 : // further in).
4753 1 : return true;
4754 : }
4755 :
4756 37 : return false;
4757 : }
4758 :
4759 : nsDisplayItemGeometry*
4760 22 : nsDisplayBorder::AllocateGeometry(nsDisplayListBuilder* aBuilder)
4761 : {
4762 22 : return new nsDisplayBorderGeometry(this, aBuilder);
4763 : }
4764 :
4765 : void
4766 166 : nsDisplayBorder::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
4767 : const nsDisplayItemGeometry* aGeometry,
4768 : nsRegion* aInvalidRegion)
4769 : {
4770 166 : const nsDisplayBorderGeometry* geometry = static_cast<const nsDisplayBorderGeometry*>(aGeometry);
4771 : bool snap;
4772 :
4773 646 : if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) ||
4774 480 : !geometry->mContentRect.IsEqualInterior(GetContentRect())) {
4775 : // We can probably get away with only invalidating the difference
4776 : // between the border and padding rects, but the XUL ui at least
4777 : // is apparently painting a background with this?
4778 9 : aInvalidRegion->Or(GetBounds(aBuilder, &snap), geometry->mBounds);
4779 : }
4780 :
4781 166 : if (aBuilder->ShouldSyncDecodeImages() &&
4782 0 : geometry->ShouldInvalidateToSyncDecodeImages()) {
4783 0 : aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
4784 : }
4785 166 : }
4786 :
4787 : LayerState
4788 227 : nsDisplayBorder::GetLayerState(nsDisplayListBuilder* aBuilder,
4789 : LayerManager* aManager,
4790 : const ContainerLayerParameters& aParameters)
4791 : {
4792 227 : if (!ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowBorderLayers)) {
4793 227 : return LAYER_NONE;
4794 : }
4795 :
4796 0 : nsPoint offset = ToReferenceFrame();
4797 : Maybe<nsCSSBorderRenderer> br =
4798 0 : nsCSSRendering::CreateBorderRenderer(mFrame->PresContext(),
4799 : nullptr,
4800 : mFrame,
4801 0 : nsRect(),
4802 0 : nsRect(offset, mFrame->GetSize()),
4803 0 : mFrame->StyleContext(),
4804 0 : mFrame->GetSkipSides());
4805 :
4806 0 : const nsStyleBorder *styleBorder = mFrame->StyleContext()->StyleBorder();
4807 0 : const nsStyleImage* image = &styleBorder->mBorderImageSource;
4808 0 : mBorderRenderer = Nothing();
4809 0 : mBorderImageRenderer = Nothing();
4810 0 : if ((!image ||
4811 0 : image->GetType() != eStyleImageType_Image ||
4812 0 : image->GetType() != eStyleImageType_Gradient) && !br) {
4813 0 : return LAYER_NONE;
4814 : }
4815 :
4816 0 : LayersBackend backend = aManager->GetBackendType();
4817 0 : if (backend == layers::LayersBackend::LAYERS_WR) {
4818 0 : if (br) {
4819 0 : if (!br->CanCreateWebRenderCommands()) {
4820 0 : return LAYER_NONE;
4821 : }
4822 0 : mBorderRenderer = br;
4823 : } else {
4824 0 : if (styleBorder->mBorderImageRepeatH == NS_STYLE_BORDER_IMAGE_REPEAT_ROUND ||
4825 0 : styleBorder->mBorderImageRepeatH == NS_STYLE_BORDER_IMAGE_REPEAT_SPACE ||
4826 0 : styleBorder->mBorderImageRepeatV == NS_STYLE_BORDER_IMAGE_REPEAT_ROUND ||
4827 0 : styleBorder->mBorderImageRepeatV == NS_STYLE_BORDER_IMAGE_REPEAT_SPACE) {
4828 : // WebRender not supports this currently
4829 0 : return LAYER_NONE;
4830 : }
4831 :
4832 0 : uint32_t flags = 0;
4833 0 : if (aBuilder->ShouldSyncDecodeImages()) {
4834 0 : flags |= nsImageRenderer::FLAG_SYNC_DECODE_IMAGES;
4835 : }
4836 :
4837 : image::DrawResult result;
4838 : mBorderImageRenderer =
4839 0 : nsCSSBorderImageRenderer::CreateBorderImageRenderer(mFrame->PresContext(),
4840 : mFrame,
4841 0 : nsRect(offset, mFrame->GetSize()),
4842 0 : *(mFrame->StyleContext()->StyleBorder()),
4843 : mVisibleRect,
4844 0 : mFrame->GetSkipSides(),
4845 : flags,
4846 0 : &result);
4847 :
4848 0 : if (!mBorderImageRenderer) {
4849 0 : return LAYER_NONE;
4850 : }
4851 :
4852 0 : if (!mBorderImageRenderer->mImageRenderer.IsImageContainerAvailable(aManager, flags)) {
4853 0 : return LAYER_NONE;
4854 : }
4855 : }
4856 :
4857 0 : return LAYER_ACTIVE;
4858 : }
4859 :
4860 0 : if (!br) {
4861 0 : return LAYER_NONE;
4862 : }
4863 :
4864 : bool hasCompositeColors;
4865 0 : if (!br->AllBordersSolid(&hasCompositeColors) || hasCompositeColors) {
4866 0 : return LAYER_NONE;
4867 : }
4868 :
4869 : // We don't support this yet as we don't copy the values to
4870 : // the layer, and BasicBorderLayer doesn't support it yet.
4871 0 : if (!br->mNoBorderRadius) {
4872 0 : return LAYER_NONE;
4873 : }
4874 :
4875 : // We copy these values correctly to the layer, but BasicBorderLayer
4876 : // won't render them
4877 0 : if (!br->AreBorderSideFinalStylesSame(eSideBitsAll) ||
4878 0 : !br->AllBordersSameWidth()) {
4879 0 : return LAYER_NONE;
4880 : }
4881 :
4882 0 : NS_FOR_CSS_SIDES(i) {
4883 0 : if (br->mBorderStyles[i] == NS_STYLE_BORDER_STYLE_SOLID) {
4884 0 : mColors[i] = ToDeviceColor(br->mBorderColors[i]);
4885 0 : mWidths[i] = br->mBorderWidths[i];
4886 0 : mBorderStyles[i] = br->mBorderStyles[i];
4887 : } else {
4888 0 : mWidths[i] = 0;
4889 : }
4890 : }
4891 0 : NS_FOR_CSS_FULL_CORNERS(corner) {
4892 0 : mCorners[corner] = LayerSize(br->mBorderRadii[corner].width, br->mBorderRadii[corner].height);
4893 : }
4894 :
4895 0 : mRect = ViewAs<LayerPixel>(br->mOuterRect);
4896 0 : return LAYER_ACTIVE;
4897 : }
4898 :
4899 : already_AddRefed<Layer>
4900 0 : nsDisplayBorder::BuildLayer(nsDisplayListBuilder* aBuilder,
4901 : LayerManager* aManager,
4902 : const ContainerLayerParameters& aContainerParameters)
4903 : {
4904 0 : if (ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowBorderLayers)) {
4905 0 : return BuildDisplayItemLayer(aBuilder, aManager, aContainerParameters);
4906 : } else {
4907 : RefPtr<BorderLayer> layer = static_cast<BorderLayer*>
4908 0 : (aManager->GetLayerBuilder()->GetLeafLayerFor(aBuilder, this));
4909 0 : if (!layer) {
4910 0 : layer = aManager->CreateBorderLayer();
4911 0 : if (!layer)
4912 0 : return nullptr;
4913 : }
4914 0 : layer->SetRect(mRect);
4915 0 : layer->SetCornerRadii(mCorners);
4916 0 : layer->SetColors(mColors);
4917 0 : layer->SetWidths(mWidths);
4918 0 : layer->SetStyles(mBorderStyles);
4919 0 : layer->SetBaseTransform(gfx::Matrix4x4::Translation(aContainerParameters.mOffset.x,
4920 0 : aContainerParameters.mOffset.y, 0));
4921 0 : return layer.forget();
4922 : }
4923 : }
4924 :
4925 : bool
4926 0 : nsDisplayBorder::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
4927 : const StackingContextHelper& aSc,
4928 : nsTArray<WebRenderParentCommand>& aParentCommands,
4929 : mozilla::layers::WebRenderLayerManager* aManager,
4930 : nsDisplayListBuilder* aDisplayListBuilder)
4931 : {
4932 0 : if (aManager->IsLayersFreeTransaction()) {
4933 0 : ContainerLayerParameters parameter;
4934 0 : if (GetLayerState(aDisplayListBuilder, aManager, parameter) != LAYER_ACTIVE) {
4935 0 : return false;
4936 : }
4937 : }
4938 :
4939 0 : if (mBorderImageRenderer) {
4940 : CreateBorderImageWebRenderCommands(aBuilder, aSc, aParentCommands,
4941 0 : aManager, aDisplayListBuilder);
4942 0 : } else if (mBorderRenderer) {
4943 0 : mBorderRenderer->CreateWebRenderCommands(aBuilder, aSc);
4944 : }
4945 :
4946 0 : return true;
4947 : };
4948 :
4949 : void
4950 0 : nsDisplayBorder::CreateBorderImageWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
4951 : const StackingContextHelper& aSc,
4952 : nsTArray<WebRenderParentCommand>& aParentCommands,
4953 : mozilla::layers::WebRenderLayerManager* aManager,
4954 : nsDisplayListBuilder* aDisplayListBuilder)
4955 : {
4956 0 : MOZ_ASSERT(mBorderImageRenderer);
4957 0 : if (!mBorderImageRenderer->mImageRenderer.IsReady()) {
4958 0 : return;
4959 : }
4960 :
4961 : float widths[4];
4962 : float slice[4];
4963 : float outset[4];
4964 0 : const int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
4965 0 : NS_FOR_CSS_SIDES(i) {
4966 0 : slice[i] = (float)(mBorderImageRenderer->mSlice.Side(i)) / appUnitsPerDevPixel;
4967 0 : widths[i] = (float)(mBorderImageRenderer->mWidths.Side(i)) / appUnitsPerDevPixel;
4968 0 : outset[i] = (float)(mBorderImageRenderer->mImageOutset.Side(i)) / appUnitsPerDevPixel;
4969 : }
4970 :
4971 : LayoutDeviceRect destRect = LayoutDeviceRect::FromAppUnits(
4972 0 : mBorderImageRenderer->mArea, appUnitsPerDevPixel);
4973 0 : WrRect dest = aSc.ToRelativeWrRectRounded(destRect);
4974 :
4975 0 : WrRect clip = dest;
4976 0 : if (!mBorderImageRenderer->mClip.IsEmpty()) {
4977 : LayoutDeviceRect clipRect = LayoutDeviceRect::FromAppUnits(
4978 0 : mBorderImageRenderer->mClip, appUnitsPerDevPixel);
4979 0 : clip = aSc.ToRelativeWrRectRounded(clipRect);
4980 : }
4981 :
4982 0 : switch (mBorderImageRenderer->mImageRenderer.GetType()) {
4983 : case eStyleImageType_Image:
4984 : {
4985 0 : uint32_t flags = aDisplayListBuilder->ShouldSyncDecodeImages() ?
4986 : imgIContainer::FLAG_SYNC_DECODE :
4987 0 : imgIContainer::FLAG_NONE;
4988 :
4989 0 : RefPtr<imgIContainer> img = mBorderImageRenderer->mImageRenderer.GetImage();
4990 0 : RefPtr<layers::ImageContainer> container = img->GetImageContainer(aManager, flags);
4991 0 : if (!container) {
4992 0 : return;
4993 : }
4994 :
4995 0 : gfx::IntSize size;
4996 0 : Maybe<wr::ImageKey> key = aManager->CreateImageKey(this, container, aBuilder, aSc, size);
4997 0 : if (key.isNothing()) {
4998 0 : return;
4999 : }
5000 :
5001 0 : aBuilder.PushBorderImage(dest,
5002 : clip,
5003 0 : wr::ToWrBorderWidths(widths[0], widths[1], widths[2], widths[3]),
5004 : key.value(),
5005 0 : wr::ToWrNinePatchDescriptor(
5006 0 : (float)(mBorderImageRenderer->mImageSize.width) / appUnitsPerDevPixel,
5007 0 : (float)(mBorderImageRenderer->mImageSize.height) / appUnitsPerDevPixel,
5008 0 : wr::ToWrSideOffsets2Du32(slice[0], slice[1], slice[2], slice[3])),
5009 0 : wr::ToWrSideOffsets2Df32(outset[0], outset[1], outset[2], outset[3]),
5010 0 : wr::ToWrRepeatMode(mBorderImageRenderer->mRepeatModeHorizontal),
5011 0 : wr::ToWrRepeatMode(mBorderImageRenderer->mRepeatModeVertical));
5012 0 : break;
5013 : }
5014 : case eStyleImageType_Gradient:
5015 : {
5016 0 : RefPtr<nsStyleGradient> gradientData = mBorderImageRenderer->mImageRenderer.GetGradientData();
5017 : nsCSSGradientRenderer renderer =
5018 0 : nsCSSGradientRenderer::Create(mFrame->PresContext(), gradientData,
5019 0 : mBorderImageRenderer->mImageSize);
5020 :
5021 : WrGradientExtendMode extendMode;
5022 0 : nsTArray<WrGradientStop> stops;
5023 0 : LayoutDevicePoint lineStart;
5024 0 : LayoutDevicePoint lineEnd;
5025 0 : LayoutDeviceSize gradientRadius;
5026 0 : renderer.BuildWebRenderParameters(1.0, extendMode, stops, lineStart, lineEnd, gradientRadius);
5027 :
5028 0 : if (gradientData->mShape == NS_STYLE_GRADIENT_SHAPE_LINEAR) {
5029 0 : LayerPoint startPoint = LayerPoint(dest.x, dest.y);
5030 0 : startPoint = startPoint + ViewAs<LayerPixel>(lineStart, PixelCastJustification::WebRenderHasUnitResolution);
5031 0 : LayerPoint endPoint = LayerPoint(dest.x, dest.y);
5032 0 : endPoint = endPoint + ViewAs<LayerPixel>(lineEnd, PixelCastJustification::WebRenderHasUnitResolution);
5033 :
5034 : aBuilder.PushBorderGradient(dest,
5035 : clip,
5036 0 : wr::ToWrBorderWidths(widths[0], widths[1], widths[2], widths[3]),
5037 0 : wr::ToWrPoint(startPoint),
5038 0 : wr::ToWrPoint(endPoint),
5039 : stops,
5040 : extendMode,
5041 0 : wr::ToWrSideOffsets2Df32(outset[0], outset[1], outset[2], outset[3]));
5042 : } else {
5043 : aBuilder.PushBorderRadialGradient(dest,
5044 : clip,
5045 0 : wr::ToWrBorderWidths(widths[0], widths[1], widths[2], widths[3]),
5046 0 : wr::ToWrPoint(lineStart),
5047 0 : wr::ToWrSize(gradientRadius),
5048 : stops,
5049 : extendMode,
5050 0 : wr::ToWrSideOffsets2Df32(outset[0], outset[1], outset[2], outset[3]));
5051 : }
5052 0 : break;
5053 : }
5054 : default:
5055 0 : MOZ_ASSERT_UNREACHABLE("Unsupport border image type");
5056 : }
5057 : }
5058 :
5059 : void
5060 37 : nsDisplayBorder::Paint(nsDisplayListBuilder* aBuilder,
5061 : gfxContext* aCtx) {
5062 37 : nsPoint offset = ToReferenceFrame();
5063 :
5064 37 : PaintBorderFlags flags = aBuilder->ShouldSyncDecodeImages()
5065 37 : ? PaintBorderFlags::SYNC_DECODE_IMAGES
5066 37 : : PaintBorderFlags();
5067 :
5068 : DrawResult result =
5069 111 : nsCSSRendering::PaintBorder(mFrame->PresContext(), *aCtx, mFrame,
5070 : mVisibleRect,
5071 74 : nsRect(offset, mFrame->GetSize()),
5072 37 : mFrame->StyleContext(),
5073 : flags,
5074 74 : mFrame->GetSkipSides());
5075 :
5076 37 : nsDisplayBorderGeometry::UpdateDrawResult(this, result);
5077 37 : }
5078 :
5079 : nsRect
5080 721 : nsDisplayBorder::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
5081 : {
5082 721 : *aSnap = true;
5083 721 : return mBounds;
5084 : }
5085 :
5086 : nsRegion
5087 179 : nsDisplayBorder::CalculateBounds(const nsStyleBorder& aStyleBorder)
5088 : {
5089 358 : nsRect borderBounds(ToReferenceFrame(), mFrame->GetSize());
5090 179 : if (aStyleBorder.IsBorderImageLoaded()) {
5091 24 : borderBounds.Inflate(aStyleBorder.GetImageOutset());
5092 24 : return borderBounds;
5093 : } else {
5094 155 : nsMargin border = aStyleBorder.GetComputedBorder();
5095 310 : nsRegion result;
5096 155 : if (border.top > 0) {
5097 107 : result = nsRect(borderBounds.X(), borderBounds.Y(), borderBounds.Width(), border.top);
5098 : }
5099 155 : if (border.right > 0) {
5100 107 : result.OrWith(nsRect(borderBounds.XMost() - border.right, borderBounds.Y(), border.right, borderBounds.Height()));
5101 : }
5102 155 : if (border.bottom > 0) {
5103 96 : result.OrWith(nsRect(borderBounds.X(), borderBounds.YMost() - border.bottom, borderBounds.Width(), border.bottom));
5104 : }
5105 155 : if (border.left > 0) {
5106 96 : result.OrWith(nsRect(borderBounds.X(), borderBounds.Y(), border.left, borderBounds.Height()));
5107 : }
5108 :
5109 : nscoord radii[8];
5110 155 : if (mFrame->GetBorderRadii(radii)) {
5111 72 : if (border.left > 0 || border.top > 0) {
5112 72 : nsSize cornerSize(radii[eCornerTopLeftX], radii[eCornerTopLeftY]);
5113 72 : result.OrWith(nsRect(borderBounds.TopLeft(), cornerSize));
5114 : }
5115 72 : if (border.top > 0 || border.right > 0) {
5116 72 : nsSize cornerSize(radii[eCornerTopRightX], radii[eCornerTopRightY]);
5117 72 : result.OrWith(nsRect(borderBounds.TopRight() - nsPoint(cornerSize.width, 0), cornerSize));
5118 : }
5119 72 : if (border.right > 0 || border.bottom > 0) {
5120 72 : nsSize cornerSize(radii[eCornerBottomRightX], radii[eCornerBottomRightY]);
5121 72 : result.OrWith(nsRect(borderBounds.BottomRight() - nsPoint(cornerSize.width, cornerSize.height), cornerSize));
5122 : }
5123 72 : if (border.bottom > 0 || border.left > 0) {
5124 72 : nsSize cornerSize(radii[eCornerBottomLeftX], radii[eCornerBottomLeftY]);
5125 72 : result.OrWith(nsRect(borderBounds.BottomLeft() - nsPoint(0, cornerSize.height), cornerSize));
5126 : }
5127 : }
5128 :
5129 155 : return result;
5130 : }
5131 : }
5132 :
5133 : // Given a region, compute a conservative approximation to it as a list
5134 : // of rectangles that aren't vertically adjacent (i.e., vertically
5135 : // adjacent or overlapping rectangles are combined).
5136 : // Right now this is only approximate, some vertically overlapping rectangles
5137 : // aren't guaranteed to be combined.
5138 : static void
5139 19 : ComputeDisjointRectangles(const nsRegion& aRegion,
5140 : nsTArray<nsRect>* aRects) {
5141 19 : nscoord accumulationMargin = nsPresContext::CSSPixelsToAppUnits(25);
5142 38 : nsRect accumulated;
5143 :
5144 61 : for (auto iter = aRegion.RectIter(); !iter.Done(); iter.Next()) {
5145 42 : const nsRect& r = iter.Get();
5146 42 : if (accumulated.IsEmpty()) {
5147 19 : accumulated = r;
5148 19 : continue;
5149 : }
5150 :
5151 23 : if (accumulated.YMost() >= r.y - accumulationMargin) {
5152 23 : accumulated.UnionRect(accumulated, r);
5153 : } else {
5154 0 : aRects->AppendElement(accumulated);
5155 0 : accumulated = r;
5156 : }
5157 : }
5158 :
5159 : // Finish the in-flight rectangle, if there is one.
5160 19 : if (!accumulated.IsEmpty()) {
5161 19 : aRects->AppendElement(accumulated);
5162 : }
5163 19 : }
5164 :
5165 : void
5166 9 : nsDisplayBoxShadowOuter::Paint(nsDisplayListBuilder* aBuilder,
5167 : gfxContext* aCtx) {
5168 9 : nsPoint offset = ToReferenceFrame();
5169 18 : nsRect borderRect = mFrame->VisualBorderRectRelativeToSelf() + offset;
5170 9 : nsPresContext* presContext = mFrame->PresContext();
5171 18 : AutoTArray<nsRect,10> rects;
5172 9 : ComputeDisjointRectangles(mVisibleRegion, &rects);
5173 :
5174 18 : AUTO_PROFILER_LABEL("nsDisplayBoxShadowOuter::Paint", GRAPHICS);
5175 :
5176 18 : for (uint32_t i = 0; i < rects.Length(); ++i) {
5177 18 : nsCSSRendering::PaintBoxShadowOuter(presContext, *aCtx, mFrame,
5178 18 : borderRect, rects[i], mOpacity);
5179 : }
5180 9 : }
5181 :
5182 : nsRect
5183 188 : nsDisplayBoxShadowOuter::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
5184 188 : *aSnap = false;
5185 188 : return mBounds;
5186 : }
5187 :
5188 : nsRect
5189 48 : nsDisplayBoxShadowOuter::GetBoundsInternal() {
5190 96 : return nsLayoutUtils::GetBoxShadowRectForFrame(mFrame, mFrame->GetSize()) +
5191 144 : ToReferenceFrame();
5192 : }
5193 :
5194 : bool
5195 9 : nsDisplayBoxShadowOuter::IsInvisibleInRect(const nsRect& aRect)
5196 : {
5197 9 : nsPoint origin = ToReferenceFrame();
5198 18 : nsRect frameRect(origin, mFrame->GetSize());
5199 9 : if (!frameRect.Contains(aRect))
5200 9 : return false;
5201 :
5202 : // the visible region is entirely inside the border-rect, and box shadows
5203 : // never render within the border-rect (unless there's a border radius).
5204 : nscoord twipsRadii[8];
5205 0 : bool hasBorderRadii = mFrame->GetBorderRadii(twipsRadii);
5206 0 : if (!hasBorderRadii)
5207 0 : return true;
5208 :
5209 0 : return RoundedRectContainsRect(frameRect, twipsRadii, aRect);
5210 : }
5211 :
5212 : bool
5213 32 : nsDisplayBoxShadowOuter::ComputeVisibility(nsDisplayListBuilder* aBuilder,
5214 : nsRegion* aVisibleRegion) {
5215 32 : if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion)) {
5216 23 : return false;
5217 : }
5218 :
5219 : // Store the actual visible region
5220 9 : mVisibleRegion.And(*aVisibleRegion, mVisibleRect);
5221 9 : return true;
5222 : }
5223 :
5224 :
5225 : LayerState
5226 48 : nsDisplayBoxShadowOuter::GetLayerState(nsDisplayListBuilder* aBuilder,
5227 : LayerManager* aManager,
5228 : const ContainerLayerParameters& aParameters)
5229 : {
5230 48 : if (ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowOuterBoxShadow) &&
5231 0 : CanBuildWebRenderDisplayItems()) {
5232 0 : return LAYER_ACTIVE;
5233 : }
5234 :
5235 48 : return LAYER_NONE;
5236 : }
5237 :
5238 : already_AddRefed<Layer>
5239 0 : nsDisplayBoxShadowOuter::BuildLayer(nsDisplayListBuilder* aBuilder,
5240 : LayerManager* aManager,
5241 : const ContainerLayerParameters& aContainerParameters)
5242 : {
5243 0 : return BuildDisplayItemLayer(aBuilder, aManager, aContainerParameters);
5244 : }
5245 :
5246 : bool
5247 0 : nsDisplayBoxShadowOuter::CanBuildWebRenderDisplayItems()
5248 : {
5249 0 : nsCSSShadowArray* shadows = mFrame->StyleEffects()->mBoxShadow;
5250 0 : if (!shadows) {
5251 0 : return false;
5252 : }
5253 :
5254 : bool hasBorderRadius;
5255 : bool nativeTheme =
5256 0 : nsCSSRendering::HasBoxShadowNativeTheme(mFrame, hasBorderRadius);
5257 :
5258 : // We don't support native themed things yet like box shadows around
5259 : // input buttons.
5260 0 : if (nativeTheme) {
5261 0 : return false;
5262 : }
5263 :
5264 0 : nsPoint offset = ToReferenceFrame();
5265 0 : nsRect borderRect = mFrame->VisualBorderRectRelativeToSelf() + offset;
5266 : nsRect frameRect =
5267 0 : nsCSSRendering::GetShadowRect(borderRect, nativeTheme, mFrame);
5268 :
5269 0 : if (hasBorderRadius) {
5270 : nscoord twipsRadii[8];
5271 0 : nsSize sz = frameRect.Size();
5272 0 : hasBorderRadius = mFrame->GetBorderRadii(sz, sz, Sides(), twipsRadii);
5273 : }
5274 :
5275 0 : if (hasBorderRadius) {
5276 0 : RectCornerRadii borderRadii;
5277 0 : nsCSSRendering::GetBorderRadii(frameRect,
5278 : borderRect,
5279 : mFrame,
5280 0 : borderRadii);
5281 0 : if (!borderRadii.AreRadiiSame()) {
5282 0 : return false;
5283 : }
5284 : }
5285 :
5286 0 : return true;
5287 : }
5288 :
5289 : bool
5290 0 : nsDisplayBoxShadowOuter::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
5291 : const StackingContextHelper& aSc,
5292 : nsTArray<WebRenderParentCommand>& aParentCommands,
5293 : mozilla::layers::WebRenderLayerManager* aManager,
5294 : nsDisplayListBuilder* aDisplayListBuilder)
5295 : {
5296 0 : if (aManager->IsLayersFreeTransaction()) {
5297 0 : ContainerLayerParameters parameter;
5298 0 : if (GetLayerState(aDisplayListBuilder, aManager, parameter) != LAYER_ACTIVE) {
5299 0 : return false;
5300 : }
5301 : }
5302 :
5303 0 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
5304 0 : nsPoint offset = ToReferenceFrame();
5305 0 : nsRect borderRect = mFrame->VisualBorderRectRelativeToSelf() + offset;
5306 0 : AutoTArray<nsRect,10> rects;
5307 : bool snap;
5308 0 : nsRect bounds = GetBounds(aDisplayListBuilder, &snap);
5309 0 : ComputeDisjointRectangles(bounds, &rects);
5310 :
5311 : bool hasBorderRadius;
5312 0 : bool nativeTheme = nsCSSRendering::HasBoxShadowNativeTheme(mFrame,
5313 0 : hasBorderRadius);
5314 :
5315 : // Don't need the full size of the shadow rect like we do in
5316 : // nsCSSRendering since WR takes care of calculations for blur
5317 : // and spread radius.
5318 : nsRect frameRect = nsCSSRendering::GetShadowRect(borderRect,
5319 : nativeTheme,
5320 0 : mFrame);
5321 :
5322 0 : RectCornerRadii borderRadii;
5323 0 : if (hasBorderRadius) {
5324 0 : hasBorderRadius = nsCSSRendering::GetBorderRadii(frameRect,
5325 : borderRect,
5326 : mFrame,
5327 : borderRadii);
5328 0 : MOZ_ASSERT(borderRadii.AreRadiiSame());
5329 : }
5330 :
5331 : // Everything here is in app units, change to device units.
5332 0 : for (uint32_t i = 0; i < rects.Length(); ++i) {
5333 : LayoutDeviceRect clipRect = LayoutDeviceRect::FromAppUnits(
5334 0 : rects[i], appUnitsPerDevPixel);
5335 0 : nsCSSShadowArray* shadows = mFrame->StyleEffects()->mBoxShadow;
5336 0 : MOZ_ASSERT(shadows);
5337 :
5338 0 : for (uint32_t j = shadows->Length(); j > 0; j--) {
5339 0 : nsCSSShadowItem* shadow = shadows->ShadowAt(j - 1);
5340 0 : float blurRadius = float(shadow->mRadius) / float(appUnitsPerDevPixel);
5341 : gfx::Color shadowColor = nsCSSRendering::GetShadowColor(shadow,
5342 : mFrame,
5343 0 : mOpacity);
5344 :
5345 : // We don't move the shadow rect here since WR does it for us
5346 : // Now translate everything to device pixels.
5347 0 : nsRect shadowRect = frameRect;
5348 0 : Point shadowOffset;
5349 0 : shadowOffset.x = (shadow->mXOffset / appUnitsPerDevPixel);
5350 0 : shadowOffset.y = (shadow->mYOffset / appUnitsPerDevPixel);
5351 :
5352 : LayoutDeviceRect deviceBox = LayoutDeviceRect::FromAppUnits(
5353 0 : shadowRect, appUnitsPerDevPixel);
5354 0 : WrRect deviceBoxRect = aSc.ToRelativeWrRectRounded(deviceBox);
5355 0 : WrRect deviceClipRect = aSc.ToRelativeWrRect(clipRect);
5356 :
5357 : // TODO: support non-uniform border radius.
5358 0 : float borderRadius = hasBorderRadius ? borderRadii.TopLeft().width
5359 0 : : 0.0;
5360 0 : float spreadRadius = float(shadow->mSpread) / float(appUnitsPerDevPixel);
5361 :
5362 0 : aBuilder.PushBoxShadow(deviceBoxRect,
5363 : deviceClipRect,
5364 : deviceBoxRect,
5365 0 : wr::ToWrPoint(shadowOffset),
5366 0 : wr::ToWrColor(shadowColor),
5367 : blurRadius,
5368 : spreadRadius,
5369 : borderRadius,
5370 0 : WrBoxShadowClipMode::Outset);
5371 : }
5372 : }
5373 :
5374 0 : return true;
5375 : }
5376 :
5377 : void
5378 46 : nsDisplayBoxShadowOuter::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
5379 : const nsDisplayItemGeometry* aGeometry,
5380 : nsRegion* aInvalidRegion)
5381 : {
5382 : const nsDisplayBoxShadowOuterGeometry* geometry =
5383 46 : static_cast<const nsDisplayBoxShadowOuterGeometry*>(aGeometry);
5384 : bool snap;
5385 264 : if (!geometry->mBounds.IsEqualInterior(GetBounds(aBuilder, &snap)) ||
5386 264 : !geometry->mBorderRect.IsEqualInterior(GetBorderRect()) ||
5387 40 : mOpacity != geometry->mOpacity) {
5388 12 : nsRegion oldShadow, newShadow;
5389 : nscoord dontCare[8];
5390 6 : bool hasBorderRadius = mFrame->GetBorderRadii(dontCare);
5391 6 : if (hasBorderRadius) {
5392 : // If we have rounded corners then we need to invalidate the frame area
5393 : // too since we paint into it.
5394 6 : oldShadow = geometry->mBounds;
5395 6 : newShadow = GetBounds(aBuilder, &snap);
5396 : } else {
5397 0 : oldShadow.Sub(geometry->mBounds, geometry->mBorderRect);
5398 0 : newShadow.Sub(GetBounds(aBuilder, &snap), GetBorderRect());
5399 : }
5400 6 : aInvalidRegion->Or(oldShadow, newShadow);
5401 : }
5402 46 : }
5403 :
5404 :
5405 : void
5406 10 : nsDisplayBoxShadowInner::Paint(nsDisplayListBuilder* aBuilder,
5407 : gfxContext* aCtx) {
5408 10 : nsPoint offset = ToReferenceFrame();
5409 20 : nsRect borderRect = nsRect(offset, mFrame->GetSize());
5410 10 : nsPresContext* presContext = mFrame->PresContext();
5411 20 : AutoTArray<nsRect,10> rects;
5412 10 : ComputeDisjointRectangles(mVisibleRegion, &rects);
5413 :
5414 20 : AUTO_PROFILER_LABEL("nsDisplayBoxShadowInner::Paint", GRAPHICS);
5415 :
5416 10 : DrawTarget* drawTarget = aCtx->GetDrawTarget();
5417 10 : gfxContext* gfx = aCtx;
5418 10 : int32_t appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
5419 :
5420 20 : for (uint32_t i = 0; i < rects.Length(); ++i) {
5421 10 : gfx->Save();
5422 10 : gfx->Clip(NSRectToSnappedRect(rects[i], appUnitsPerDevPixel, *drawTarget));
5423 10 : nsCSSRendering::PaintBoxShadowInner(presContext, *aCtx, mFrame, borderRect);
5424 10 : gfx->Restore();
5425 : }
5426 10 : }
5427 :
5428 : bool
5429 0 : nsDisplayBoxShadowInner::CanCreateWebRenderCommands(nsDisplayListBuilder* aBuilder,
5430 : nsIFrame* aFrame,
5431 : nsPoint aReferenceOffset)
5432 : {
5433 0 : nsRect borderRect = nsRect(aReferenceOffset, aFrame->GetSize());
5434 0 : RectCornerRadii innerRadii;
5435 : bool hasBorderRadius =
5436 0 : nsCSSRendering::GetShadowInnerRadii(aFrame, borderRect, innerRadii);
5437 0 : if (hasBorderRadius) {
5438 0 : return false;
5439 : }
5440 :
5441 0 : nsCSSShadowArray *shadows = aFrame->StyleEffects()->mBoxShadow;
5442 0 : if (!shadows) {
5443 : // Means we don't have to paint anything
5444 0 : return true;
5445 : }
5446 :
5447 0 : return true;
5448 : }
5449 :
5450 : LayerState
5451 24 : nsDisplayBoxShadowInner::GetLayerState(nsDisplayListBuilder* aBuilder,
5452 : LayerManager* aManager,
5453 : const ContainerLayerParameters& aParameters)
5454 : {
5455 72 : if (ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowInsetBoxShadow) &&
5456 24 : CanCreateWebRenderCommands(aBuilder, mFrame, ToReferenceFrame())) {
5457 0 : return LAYER_ACTIVE;
5458 : }
5459 :
5460 24 : return LAYER_NONE;
5461 : }
5462 :
5463 : already_AddRefed<Layer>
5464 0 : nsDisplayBoxShadowInner::BuildLayer(nsDisplayListBuilder* aBuilder,
5465 : LayerManager* aManager,
5466 : const ContainerLayerParameters& aContainerParameters)
5467 : {
5468 0 : return BuildDisplayItemLayer(aBuilder, aManager, aContainerParameters);
5469 : }
5470 :
5471 : /* static */ void
5472 0 : nsDisplayBoxShadowInner::CreateInsetBoxShadowWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
5473 : const StackingContextHelper& aSc,
5474 : nsRegion& aVisibleRegion,
5475 : nsIFrame* aFrame,
5476 : const nsRect aBorderRect)
5477 : {
5478 0 : if (!nsCSSRendering::ShouldPaintBoxShadowInner(aFrame)) {
5479 0 : return;
5480 : }
5481 :
5482 0 : int32_t appUnitsPerDevPixel = aFrame->PresContext()->AppUnitsPerDevPixel();
5483 :
5484 0 : AutoTArray<nsRect,10> rects;
5485 0 : ComputeDisjointRectangles(aVisibleRegion, &rects);
5486 :
5487 0 : nsCSSShadowArray* shadows = aFrame->StyleEffects()->mBoxShadow;
5488 :
5489 0 : for (uint32_t i = 0; i < rects.Length(); ++i) {
5490 : LayoutDeviceRect clipRect = LayoutDeviceRect::FromAppUnits(
5491 0 : rects[i], appUnitsPerDevPixel);
5492 :
5493 0 : for (uint32_t i = shadows->Length(); i > 0; --i) {
5494 0 : nsCSSShadowItem* shadowItem = shadows->ShadowAt(i - 1);
5495 0 : if (!shadowItem->mInset) {
5496 0 : continue;
5497 : }
5498 :
5499 : nsRect shadowRect =
5500 0 : nsCSSRendering::GetBoxShadowInnerPaddingRect(aFrame, aBorderRect);
5501 0 : RectCornerRadii innerRadii;
5502 0 : nsCSSRendering::GetShadowInnerRadii(aFrame, aBorderRect, innerRadii);
5503 :
5504 : // Now translate everything to device pixels.
5505 0 : Rect deviceBoxRect = LayoutDeviceRect::FromAppUnits(
5506 0 : shadowRect, appUnitsPerDevPixel).ToUnknownRect();
5507 0 : WrRect deviceClipRect = aSc.ToRelativeWrRect(clipRect);
5508 0 : Color shadowColor = nsCSSRendering::GetShadowColor(shadowItem, aFrame, 1.0);
5509 :
5510 0 : Point shadowOffset;
5511 0 : shadowOffset.x = (shadowItem->mXOffset / appUnitsPerDevPixel);
5512 0 : shadowOffset.y = (shadowItem->mYOffset / appUnitsPerDevPixel);
5513 :
5514 0 : float blurRadius = float(shadowItem->mRadius) / float(appUnitsPerDevPixel);
5515 : // TODO: WR doesn't support non-uniform border radii
5516 0 : float borderRadius = innerRadii.TopLeft().width;
5517 : // NOTE: Any spread radius > 0 will render nothing. WR Bug.
5518 0 : float spreadRadius = float(shadowItem->mSpread) / float(appUnitsPerDevPixel);
5519 :
5520 0 : aBuilder.PushBoxShadow(wr::ToWrRect(deviceBoxRect),
5521 : deviceClipRect,
5522 0 : wr::ToWrRect(deviceBoxRect),
5523 0 : wr::ToWrPoint(shadowOffset),
5524 0 : wr::ToWrColor(shadowColor),
5525 : blurRadius,
5526 : spreadRadius,
5527 : borderRadius,
5528 : WrBoxShadowClipMode::Inset
5529 0 : );
5530 : }
5531 : }
5532 : }
5533 :
5534 : bool
5535 0 : nsDisplayBoxShadowInner::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
5536 : const StackingContextHelper& aSc,
5537 : nsTArray<WebRenderParentCommand>& aParentCommands,
5538 : mozilla::layers::WebRenderLayerManager* aManager,
5539 : nsDisplayListBuilder* aDisplayListBuilder)
5540 : {
5541 0 : if (aManager->IsLayersFreeTransaction()) {
5542 0 : ContainerLayerParameters parameter;
5543 0 : if (GetLayerState(aDisplayListBuilder, aManager, parameter) != LAYER_ACTIVE) {
5544 0 : return false;
5545 : }
5546 : }
5547 :
5548 : bool snap;
5549 0 : nsRegion visible = GetBounds(aDisplayListBuilder, &snap);
5550 0 : nsPoint offset = ToReferenceFrame();
5551 0 : nsRect borderRect = nsRect(offset, mFrame->GetSize());
5552 0 : nsDisplayBoxShadowInner::CreateInsetBoxShadowWebRenderCommands(aBuilder, aSc, visible,
5553 0 : mFrame, borderRect);
5554 :
5555 0 : return true;
5556 : }
5557 :
5558 : bool
5559 16 : nsDisplayBoxShadowInner::ComputeVisibility(nsDisplayListBuilder* aBuilder,
5560 : nsRegion* aVisibleRegion) {
5561 16 : if (!nsDisplayItem::ComputeVisibility(aBuilder, aVisibleRegion)) {
5562 6 : return false;
5563 : }
5564 :
5565 : // Store the actual visible region
5566 10 : mVisibleRegion.And(*aVisibleRegion, mVisibleRect);
5567 10 : return true;
5568 : }
5569 :
5570 24 : nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
5571 24 : nsIFrame* aFrame, nsDisplayList* aList)
5572 : : nsDisplayWrapList(aBuilder, aFrame, aList,
5573 24 : aBuilder->CurrentActiveScrolledRoot())
5574 24 : {}
5575 :
5576 562 : nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
5577 : nsIFrame* aFrame, nsDisplayList* aList,
5578 562 : const ActiveScrolledRoot* aActiveScrolledRoot)
5579 : : nsDisplayItem(aBuilder, aFrame, aActiveScrolledRoot)
5580 : , mOverrideZIndex(0)
5581 562 : , mHasZIndexOverride(false)
5582 : {
5583 562 : MOZ_COUNT_CTOR(nsDisplayWrapList);
5584 :
5585 562 : mBaseVisibleRect = mVisibleRect;
5586 :
5587 562 : mList.AppendToTop(aList);
5588 562 : UpdateBounds(aBuilder);
5589 :
5590 562 : if (!aFrame || !aFrame->IsTransformed()) {
5591 538 : return;
5592 : }
5593 :
5594 : // If we're a transformed frame, then we need to find out if we're inside
5595 : // the nsDisplayTransform or outside of it. Frames inside the transform
5596 : // need mReferenceFrame == mFrame, outside needs the next ancestor
5597 : // reference frame.
5598 : // If we're inside the transform, then the nsDisplayItem constructor
5599 : // will have done the right thing.
5600 : // If we're outside the transform, then we should have only one child
5601 : // (since nsDisplayTransform wraps all actual content), and that child
5602 : // will have the correct reference frame set (since nsDisplayTransform
5603 : // handles this explictly).
5604 24 : nsDisplayItem *i = mList.GetBottom();
5605 38 : if (i && (!i->GetAbove() || i->GetType() == TYPE_TRANSFORM) &&
5606 14 : i->Frame() == mFrame) {
5607 0 : mReferenceFrame = i->ReferenceFrame();
5608 0 : mToReferenceFrame = i->ToReferenceFrame();
5609 : }
5610 24 : mVisibleRect = aBuilder->GetDirtyRect() +
5611 : aBuilder->GetCurrentFrameOffsetToReferenceFrame();
5612 : }
5613 :
5614 0 : nsDisplayWrapList::nsDisplayWrapList(nsDisplayListBuilder* aBuilder,
5615 0 : nsIFrame* aFrame, nsDisplayItem* aItem)
5616 : : nsDisplayItem(aBuilder, aFrame)
5617 : , mOverrideZIndex(0)
5618 0 : , mHasZIndexOverride(false)
5619 : {
5620 0 : MOZ_COUNT_CTOR(nsDisplayWrapList);
5621 :
5622 0 : mBaseVisibleRect = mVisibleRect;
5623 :
5624 0 : mList.AppendToTop(aItem);
5625 0 : UpdateBounds(aBuilder);
5626 :
5627 0 : if (!aFrame || !aFrame->IsTransformed()) {
5628 0 : return;
5629 : }
5630 :
5631 : // See the previous nsDisplayWrapList constructor
5632 0 : if (aItem->Frame() == aFrame) {
5633 0 : mReferenceFrame = aItem->ReferenceFrame();
5634 0 : mToReferenceFrame = aItem->ToReferenceFrame();
5635 : }
5636 0 : mVisibleRect = aBuilder->GetDirtyRect() +
5637 : aBuilder->GetCurrentFrameOffsetToReferenceFrame();
5638 : }
5639 :
5640 1124 : nsDisplayWrapList::~nsDisplayWrapList() {
5641 562 : mList.DeleteAll();
5642 :
5643 562 : MOZ_COUNT_DTOR(nsDisplayWrapList);
5644 562 : }
5645 :
5646 : void
5647 18 : nsDisplayWrapList::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
5648 : HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames) {
5649 18 : mList.HitTest(aBuilder, aRect, aState, aOutFrames);
5650 18 : }
5651 :
5652 : nsRect
5653 1234 : nsDisplayWrapList::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap) {
5654 1234 : *aSnap = false;
5655 1234 : return mBounds;
5656 : }
5657 :
5658 : bool
5659 96 : nsDisplayWrapList::ComputeVisibility(nsDisplayListBuilder* aBuilder,
5660 : nsRegion* aVisibleRegion) {
5661 : // Convert the passed in visible region to our appunits.
5662 192 : nsRegion visibleRegion;
5663 : // mVisibleRect has been clipped to GetClippedBounds
5664 96 : visibleRegion.And(*aVisibleRegion, mVisibleRect);
5665 192 : nsRegion originalVisibleRegion = visibleRegion;
5666 :
5667 : bool retval =
5668 96 : mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion, mVisibleRect);
5669 :
5670 192 : nsRegion removed;
5671 : // removed = originalVisibleRegion - visibleRegion
5672 96 : removed.Sub(originalVisibleRegion, visibleRegion);
5673 : // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications
5674 : // SubtractFromVisibleRegion does)
5675 96 : aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
5676 :
5677 192 : return retval;
5678 : }
5679 :
5680 : nsRegion
5681 32 : nsDisplayWrapList::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
5682 : bool* aSnap) {
5683 32 : *aSnap = false;
5684 32 : nsRegion result;
5685 32 : if (mList.IsOpaque()) {
5686 : // Everything within GetBounds that's visible is opaque.
5687 4 : result = GetBounds(aBuilder, aSnap);
5688 : }
5689 32 : return result;
5690 : }
5691 :
5692 : Maybe<nscolor>
5693 50 : nsDisplayWrapList::IsUniform(nsDisplayListBuilder* aBuilder) {
5694 : // We could try to do something but let's conservatively just return Nothing.
5695 50 : return Nothing();
5696 : }
5697 :
5698 0 : void nsDisplayWrapList::Paint(nsDisplayListBuilder* aBuilder,
5699 : gfxContext* aCtx) {
5700 0 : NS_ERROR("nsDisplayWrapList should have been flattened away for painting");
5701 0 : }
5702 :
5703 : /**
5704 : * Returns true if all descendant display items can be placed in the same
5705 : * PaintedLayer --- GetLayerState returns LAYER_INACTIVE or LAYER_NONE,
5706 : * and they all have the expected animated geometry root.
5707 : */
5708 : static LayerState
5709 180 : RequiredLayerStateForChildren(nsDisplayListBuilder* aBuilder,
5710 : LayerManager* aManager,
5711 : const ContainerLayerParameters& aParameters,
5712 : const nsDisplayList& aList,
5713 : AnimatedGeometryRoot* aExpectedAnimatedGeometryRootForChildren)
5714 : {
5715 180 : LayerState result = LAYER_INACTIVE;
5716 586 : for (nsDisplayItem* i = aList.GetBottom(); i; i = i->GetAbove()) {
5717 812 : if (result == LAYER_INACTIVE &&
5718 406 : i->GetAnimatedGeometryRoot() != aExpectedAnimatedGeometryRootForChildren) {
5719 0 : result = LAYER_ACTIVE;
5720 : }
5721 :
5722 406 : LayerState state = i->GetLayerState(aBuilder, aManager, aParameters);
5723 406 : if (state == LAYER_ACTIVE && i->GetType() == nsDisplayItem::TYPE_BLEND_MODE) {
5724 : // nsDisplayBlendMode always returns LAYER_ACTIVE to ensure that the
5725 : // blending operation happens in the intermediate surface of its parent
5726 : // display item (usually an nsDisplayBlendContainer). But this does not
5727 : // mean that it needs all its ancestor display items to become active.
5728 : // So we ignore its layer state and look at its children instead.
5729 0 : state = RequiredLayerStateForChildren(aBuilder, aManager, aParameters,
5730 0 : *i->GetSameCoordinateSystemChildren(), i->GetAnimatedGeometryRoot());
5731 : }
5732 406 : if ((state == LAYER_ACTIVE || state == LAYER_ACTIVE_FORCE) &&
5733 0 : state > result) {
5734 0 : result = state;
5735 : }
5736 406 : if (state == LAYER_ACTIVE_EMPTY && state > result) {
5737 0 : result = LAYER_ACTIVE_FORCE;
5738 : }
5739 406 : if (state == LAYER_NONE) {
5740 402 : nsDisplayList* list = i->GetSameCoordinateSystemChildren();
5741 402 : if (list) {
5742 : LayerState childState =
5743 : RequiredLayerStateForChildren(aBuilder, aManager, aParameters, *list,
5744 0 : aExpectedAnimatedGeometryRootForChildren);
5745 0 : if (childState > result) {
5746 0 : result = childState;
5747 : }
5748 : }
5749 : }
5750 : }
5751 180 : return result;
5752 : }
5753 :
5754 52 : nsRect nsDisplayWrapList::GetComponentAlphaBounds(nsDisplayListBuilder* aBuilder)
5755 : {
5756 52 : nsRect bounds;
5757 106 : for (nsDisplayItem* i = mList.GetBottom(); i; i = i->GetAbove()) {
5758 54 : bounds.UnionRect(bounds, i->GetComponentAlphaBounds(aBuilder));
5759 : }
5760 52 : return bounds;
5761 : }
5762 :
5763 : void
5764 24 : nsDisplayWrapList::SetVisibleRect(const nsRect& aRect)
5765 : {
5766 24 : mVisibleRect = aRect;
5767 24 : }
5768 :
5769 : void
5770 0 : nsDisplayWrapList::SetReferenceFrame(const nsIFrame* aFrame)
5771 : {
5772 0 : mReferenceFrame = aFrame;
5773 0 : mToReferenceFrame = mFrame->GetOffsetToCrossDoc(mReferenceFrame);
5774 0 : }
5775 :
5776 : static nsresult
5777 0 : WrapDisplayList(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame,
5778 : nsDisplayList* aList, nsDisplayWrapper* aWrapper) {
5779 0 : if (!aList->GetTop())
5780 0 : return NS_OK;
5781 0 : nsDisplayItem* item = aWrapper->WrapList(aBuilder, aFrame, aList);
5782 0 : if (!item)
5783 0 : return NS_ERROR_OUT_OF_MEMORY;
5784 : // aList was emptied
5785 0 : aList->AppendToTop(item);
5786 0 : return NS_OK;
5787 : }
5788 :
5789 : static nsresult
5790 0 : WrapEachDisplayItem(nsDisplayListBuilder* aBuilder,
5791 : nsDisplayList* aList, nsDisplayWrapper* aWrapper) {
5792 0 : nsDisplayList newList;
5793 : nsDisplayItem* item;
5794 0 : while ((item = aList->RemoveBottom())) {
5795 0 : item = aWrapper->WrapItem(aBuilder, item);
5796 0 : if (!item)
5797 0 : return NS_ERROR_OUT_OF_MEMORY;
5798 0 : newList.AppendToTop(item);
5799 : }
5800 : // aList was emptied
5801 0 : aList->AppendToTop(&newList);
5802 0 : return NS_OK;
5803 : }
5804 :
5805 0 : nsresult nsDisplayWrapper::WrapLists(nsDisplayListBuilder* aBuilder,
5806 : nsIFrame* aFrame, const nsDisplayListSet& aIn, const nsDisplayListSet& aOut)
5807 : {
5808 0 : nsresult rv = WrapListsInPlace(aBuilder, aFrame, aIn);
5809 0 : NS_ENSURE_SUCCESS(rv, rv);
5810 :
5811 0 : if (&aOut == &aIn)
5812 0 : return NS_OK;
5813 0 : aOut.BorderBackground()->AppendToTop(aIn.BorderBackground());
5814 0 : aOut.BlockBorderBackgrounds()->AppendToTop(aIn.BlockBorderBackgrounds());
5815 0 : aOut.Floats()->AppendToTop(aIn.Floats());
5816 0 : aOut.Content()->AppendToTop(aIn.Content());
5817 0 : aOut.PositionedDescendants()->AppendToTop(aIn.PositionedDescendants());
5818 0 : aOut.Outlines()->AppendToTop(aIn.Outlines());
5819 0 : return NS_OK;
5820 : }
5821 :
5822 0 : nsresult nsDisplayWrapper::WrapListsInPlace(nsDisplayListBuilder* aBuilder,
5823 : nsIFrame* aFrame, const nsDisplayListSet& aLists)
5824 : {
5825 : nsresult rv;
5826 0 : if (WrapBorderBackground()) {
5827 : // Our border-backgrounds are in-flow
5828 0 : rv = WrapDisplayList(aBuilder, aFrame, aLists.BorderBackground(), this);
5829 0 : NS_ENSURE_SUCCESS(rv, rv);
5830 : }
5831 : // Our block border-backgrounds are in-flow
5832 0 : rv = WrapDisplayList(aBuilder, aFrame, aLists.BlockBorderBackgrounds(), this);
5833 0 : NS_ENSURE_SUCCESS(rv, rv);
5834 : // The floats are not in flow
5835 0 : rv = WrapEachDisplayItem(aBuilder, aLists.Floats(), this);
5836 0 : NS_ENSURE_SUCCESS(rv, rv);
5837 : // Our child content is in flow
5838 0 : rv = WrapDisplayList(aBuilder, aFrame, aLists.Content(), this);
5839 0 : NS_ENSURE_SUCCESS(rv, rv);
5840 : // The positioned descendants may not be in-flow
5841 0 : rv = WrapEachDisplayItem(aBuilder, aLists.PositionedDescendants(), this);
5842 0 : NS_ENSURE_SUCCESS(rv, rv);
5843 : // The outlines may not be in-flow
5844 0 : return WrapEachDisplayItem(aBuilder, aLists.Outlines(), this);
5845 : }
5846 :
5847 173 : nsDisplayOpacity::nsDisplayOpacity(nsDisplayListBuilder* aBuilder,
5848 : nsIFrame* aFrame, nsDisplayList* aList,
5849 : const ActiveScrolledRoot* aActiveScrolledRoot,
5850 173 : bool aForEventsAndPluginsOnly)
5851 : : nsDisplayWrapList(aBuilder, aFrame, aList, aActiveScrolledRoot)
5852 173 : , mOpacity(aFrame->StyleEffects()->mOpacity)
5853 346 : , mForEventsAndPluginsOnly(aForEventsAndPluginsOnly)
5854 : {
5855 173 : MOZ_COUNT_CTOR(nsDisplayOpacity);
5856 173 : }
5857 :
5858 : #ifdef NS_BUILD_REFCNT_LOGGING
5859 346 : nsDisplayOpacity::~nsDisplayOpacity() {
5860 173 : MOZ_COUNT_DTOR(nsDisplayOpacity);
5861 173 : }
5862 : #endif
5863 :
5864 161 : nsRegion nsDisplayOpacity::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
5865 : bool* aSnap) {
5866 161 : *aSnap = false;
5867 : // The only time where mOpacity == 1.0 should be when we have will-change.
5868 : // We could report this as opaque then but when the will-change value starts
5869 : // animating the element would become non opaque and could cause repaints.
5870 161 : return nsRegion();
5871 : }
5872 :
5873 : // nsDisplayOpacity uses layers for rendering
5874 : already_AddRefed<Layer>
5875 136 : nsDisplayOpacity::BuildLayer(nsDisplayListBuilder* aBuilder,
5876 : LayerManager* aManager,
5877 : const ContainerLayerParameters& aContainerParameters) {
5878 136 : ContainerLayerParameters params = aContainerParameters;
5879 136 : params.mForEventsAndPluginsOnly = mForEventsAndPluginsOnly;
5880 : RefPtr<Layer> container = aManager->GetLayerBuilder()->
5881 272 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
5882 : params, nullptr,
5883 272 : FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR);
5884 136 : if (!container)
5885 0 : return nullptr;
5886 :
5887 136 : container->SetOpacity(mOpacity);
5888 136 : nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder,
5889 : this, mFrame,
5890 136 : eCSSProperty_opacity);
5891 136 : return container.forget();
5892 : }
5893 :
5894 : /**
5895 : * This doesn't take into account layer scaling --- the layer may be
5896 : * rendered at a higher (or lower) resolution, affecting the retained layer
5897 : * size --- but this should be good enough.
5898 : */
5899 : static bool
5900 0 : IsItemTooSmallForActiveLayer(nsIFrame* aFrame)
5901 : {
5902 0 : nsIntRect visibleDevPixels = aFrame->GetVisualOverflowRectRelativeToSelf().ToOutsidePixels(
5903 0 : aFrame->PresContext()->AppUnitsPerDevPixel());
5904 0 : return visibleDevPixels.Size() <
5905 0 : nsIntSize(gfxPrefs::LayoutMinActiveLayerSize(),
5906 0 : gfxPrefs::LayoutMinActiveLayerSize());
5907 : }
5908 :
5909 : /* static */ bool
5910 301 : nsDisplayOpacity::NeedsActiveLayer(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
5911 : {
5912 602 : if (EffectCompositor::HasAnimationsForCompositor(aFrame,
5913 602 : eCSSProperty_opacity) ||
5914 301 : (ActiveLayerTracker::IsStyleAnimated(aBuilder, aFrame,
5915 0 : eCSSProperty_opacity) &&
5916 0 : !IsItemTooSmallForActiveLayer(aFrame))) {
5917 0 : return true;
5918 : }
5919 301 : return false;
5920 : }
5921 :
5922 : void
5923 0 : nsDisplayOpacity::ApplyOpacity(nsDisplayListBuilder* aBuilder,
5924 : float aOpacity,
5925 : const DisplayItemClipChain* aClip)
5926 : {
5927 0 : NS_ASSERTION(CanApplyOpacity(), "ApplyOpacity should be allowed");
5928 0 : mOpacity = mOpacity * aOpacity;
5929 0 : IntersectClip(aBuilder, aClip);
5930 0 : }
5931 :
5932 : bool
5933 0 : nsDisplayOpacity::CanApplyOpacity() const
5934 : {
5935 0 : return true;
5936 : }
5937 :
5938 : bool
5939 173 : nsDisplayOpacity::ShouldFlattenAway(nsDisplayListBuilder* aBuilder)
5940 : {
5941 173 : if (NeedsActiveLayer(aBuilder, mFrame) || mOpacity == 0.0) {
5942 : // If our opacity is zero then we'll discard all descendant display items
5943 : // except for layer event regions, so there's no point in doing this
5944 : // optimization (and if we do do it, then invalidations of those descendants
5945 : // might trigger repainting).
5946 72 : return false;
5947 : }
5948 :
5949 101 : nsDisplayItem* child = mList.GetBottom();
5950 : // Only try folding our opacity down if we have at most three children
5951 : // that don't overlap and can all apply the opacity to themselves.
5952 101 : if (!child) {
5953 0 : return false;
5954 : }
5955 606 : struct {
5956 : nsDisplayItem* item;
5957 : nsRect bounds;
5958 202 : } children[3];
5959 : bool snap;
5960 101 : uint32_t numChildren = 0;
5961 325 : for (; numChildren < ArrayLength(children) && child; numChildren++, child = child->GetAbove()) {
5962 176 : if (child->GetType() == nsDisplayItem::TYPE_LAYER_EVENT_REGIONS) {
5963 51 : numChildren--;
5964 51 : continue;
5965 : }
5966 125 : if (!child->CanApplyOpacity()) {
5967 64 : return false;
5968 : }
5969 61 : children[numChildren].item = child;
5970 61 : children[numChildren].bounds = child->GetBounds(aBuilder, &snap);
5971 : }
5972 37 : if (child) {
5973 : // we have a fourth (or more) child
5974 0 : return false;
5975 : }
5976 :
5977 74 : for (uint32_t i = 0; i < numChildren; i++) {
5978 37 : for (uint32_t j = i+1; j < numChildren; j++) {
5979 0 : if (children[i].bounds.Intersects(children[j].bounds)) {
5980 0 : return false;
5981 : }
5982 : }
5983 : }
5984 :
5985 : // When intersecting the children's clip, only intersect with the clip for
5986 : // our ASR and not with the whole clip chain, because the rest of the clip
5987 : // chain is usually already set on the children. In fact, opacity items
5988 : // usually never have their own clip because during display item creation
5989 : // time we propagated the clip to our contents, so maybe we should just
5990 : // remove the clip parameter from ApplyOpacity completely.
5991 74 : DisplayItemClipChain clip = { GetClip(), mActiveScrolledRoot, nullptr };
5992 :
5993 74 : for (uint32_t i = 0; i < numChildren; i++) {
5994 37 : children[i].item->ApplyOpacity(aBuilder, mOpacity, mClip ? &clip : nullptr);
5995 : }
5996 37 : return true;
5997 : }
5998 :
5999 : nsDisplayItem::LayerState
6000 272 : nsDisplayOpacity::GetLayerState(nsDisplayListBuilder* aBuilder,
6001 : LayerManager* aManager,
6002 : const ContainerLayerParameters& aParameters) {
6003 : // If we only created this item so that we'd get correct nsDisplayEventRegions for child
6004 : // frames, then force us to inactive to avoid unnecessary layerization changes for content
6005 : // that won't ever be painted.
6006 272 : if (mForEventsAndPluginsOnly) {
6007 144 : MOZ_ASSERT(mOpacity == 0);
6008 144 : return LAYER_INACTIVE;
6009 : }
6010 :
6011 128 : if (NeedsActiveLayer(aBuilder, mFrame)) {
6012 : // Returns LAYER_ACTIVE_FORCE to avoid flatterning the layer for async
6013 : // animations.
6014 0 : return LAYER_ACTIVE_FORCE;
6015 : }
6016 :
6017 128 : return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, mList, GetAnimatedGeometryRoot());
6018 : }
6019 :
6020 : bool
6021 94 : nsDisplayOpacity::ComputeVisibility(nsDisplayListBuilder* aBuilder,
6022 : nsRegion* aVisibleRegion) {
6023 : // Our children are translucent so we should not allow them to subtract
6024 : // area from aVisibleRegion. We do need to find out what is visible under
6025 : // our children in the temporary compositing buffer, because if our children
6026 : // paint our entire bounds opaquely then we don't need an alpha channel in
6027 : // the temporary compositing buffer.
6028 188 : nsRect bounds = GetClippedBounds(aBuilder);
6029 188 : nsRegion visibleUnderChildren;
6030 94 : visibleUnderChildren.And(*aVisibleRegion, bounds);
6031 : return
6032 188 : nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren);
6033 : }
6034 :
6035 197 : bool nsDisplayOpacity::TryMerge(nsDisplayItem* aItem) {
6036 197 : if (aItem->GetType() != TYPE_OPACITY)
6037 181 : return false;
6038 : // items for the same content element should be merged into a single
6039 : // compositing group
6040 : // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity
6041 16 : if (aItem->Frame()->GetContent() != mFrame->GetContent())
6042 16 : return false;
6043 0 : if (aItem->GetClipChain() != GetClipChain())
6044 0 : return false;
6045 0 : MergeFromTrackingMergedFrames(static_cast<nsDisplayOpacity*>(aItem));
6046 0 : return true;
6047 : }
6048 :
6049 : void
6050 0 : nsDisplayOpacity::WriteDebugInfo(std::stringstream& aStream)
6051 : {
6052 0 : aStream << " (opacity " << mOpacity << ")";
6053 0 : }
6054 :
6055 0 : nsDisplayBlendMode::nsDisplayBlendMode(nsDisplayListBuilder* aBuilder,
6056 : nsIFrame* aFrame, nsDisplayList* aList,
6057 : uint8_t aBlendMode,
6058 : const ActiveScrolledRoot* aActiveScrolledRoot,
6059 0 : uint32_t aIndex)
6060 : : nsDisplayWrapList(aBuilder, aFrame, aList, aActiveScrolledRoot)
6061 : , mBlendMode(aBlendMode)
6062 0 : , mIndex(aIndex)
6063 : {
6064 0 : MOZ_COUNT_CTOR(nsDisplayBlendMode);
6065 0 : }
6066 :
6067 : #ifdef NS_BUILD_REFCNT_LOGGING
6068 0 : nsDisplayBlendMode::~nsDisplayBlendMode() {
6069 0 : MOZ_COUNT_DTOR(nsDisplayBlendMode);
6070 0 : }
6071 : #endif
6072 :
6073 0 : nsRegion nsDisplayBlendMode::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
6074 : bool* aSnap) {
6075 0 : *aSnap = false;
6076 : // We are never considered opaque
6077 0 : return nsRegion();
6078 : }
6079 :
6080 : LayerState
6081 0 : nsDisplayBlendMode::GetLayerState(nsDisplayListBuilder* aBuilder,
6082 : LayerManager* aManager,
6083 : const ContainerLayerParameters& aParameters)
6084 : {
6085 0 : return LAYER_ACTIVE;
6086 : }
6087 :
6088 : // nsDisplayBlendMode uses layers for rendering
6089 : already_AddRefed<Layer>
6090 0 : nsDisplayBlendMode::BuildLayer(nsDisplayListBuilder* aBuilder,
6091 : LayerManager* aManager,
6092 : const ContainerLayerParameters& aContainerParameters) {
6093 0 : ContainerLayerParameters newContainerParameters = aContainerParameters;
6094 0 : newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
6095 :
6096 : RefPtr<Layer> container = aManager->GetLayerBuilder()->
6097 0 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
6098 0 : newContainerParameters, nullptr);
6099 0 : if (!container) {
6100 0 : return nullptr;
6101 : }
6102 :
6103 0 : container->SetMixBlendMode(nsCSSRendering::GetGFXBlendMode(mBlendMode));
6104 :
6105 0 : return container.forget();
6106 : }
6107 :
6108 0 : bool nsDisplayBlendMode::ComputeVisibility(nsDisplayListBuilder* aBuilder,
6109 : nsRegion* aVisibleRegion) {
6110 : // Our children are need their backdrop so we should not allow them to subtract
6111 : // area from aVisibleRegion. We do need to find out what is visible under
6112 : // our children in the temporary compositing buffer, because if our children
6113 : // paint our entire bounds opaquely then we don't need an alpha channel in
6114 : // the temporary compositing buffer.
6115 0 : nsRect bounds = GetClippedBounds(aBuilder);
6116 0 : nsRegion visibleUnderChildren;
6117 0 : visibleUnderChildren.And(*aVisibleRegion, bounds);
6118 0 : return nsDisplayWrapList::ComputeVisibility(aBuilder, &visibleUnderChildren);
6119 : }
6120 :
6121 0 : bool nsDisplayBlendMode::TryMerge(nsDisplayItem* aItem) {
6122 0 : if (aItem->GetType() != TYPE_BLEND_MODE)
6123 0 : return false;
6124 0 : nsDisplayBlendMode* item = static_cast<nsDisplayBlendMode*>(aItem);
6125 : // items for the same content element should be merged into a single
6126 : // compositing group
6127 0 : if (item->Frame()->GetContent() != mFrame->GetContent())
6128 0 : return false;
6129 0 : if (item->mIndex != 0 || mIndex != 0)
6130 0 : return false; // don't merge background-blend-mode items
6131 0 : if (item->GetClipChain() != GetClipChain())
6132 0 : return false;
6133 0 : MergeFromTrackingMergedFrames(item);
6134 0 : return true;
6135 : }
6136 :
6137 : /* static */ nsDisplayBlendContainer*
6138 0 : nsDisplayBlendContainer::CreateForMixBlendMode(nsDisplayListBuilder* aBuilder,
6139 : nsIFrame* aFrame, nsDisplayList* aList,
6140 : const ActiveScrolledRoot* aActiveScrolledRoot)
6141 : {
6142 0 : return new (aBuilder) nsDisplayBlendContainer(aBuilder, aFrame, aList, aActiveScrolledRoot, false);
6143 : }
6144 :
6145 : /* static */ nsDisplayBlendContainer*
6146 0 : nsDisplayBlendContainer::CreateForBackgroundBlendMode(nsDisplayListBuilder* aBuilder,
6147 : nsIFrame* aFrame, nsDisplayList* aList,
6148 : const ActiveScrolledRoot* aActiveScrolledRoot)
6149 : {
6150 0 : return new (aBuilder) nsDisplayBlendContainer(aBuilder, aFrame, aList, aActiveScrolledRoot, true);
6151 : }
6152 :
6153 0 : nsDisplayBlendContainer::nsDisplayBlendContainer(nsDisplayListBuilder* aBuilder,
6154 : nsIFrame* aFrame, nsDisplayList* aList,
6155 : const ActiveScrolledRoot* aActiveScrolledRoot,
6156 0 : bool aIsForBackground)
6157 : : nsDisplayWrapList(aBuilder, aFrame, aList, aActiveScrolledRoot)
6158 0 : , mIsForBackground(aIsForBackground)
6159 : {
6160 0 : MOZ_COUNT_CTOR(nsDisplayBlendContainer);
6161 0 : }
6162 :
6163 : #ifdef NS_BUILD_REFCNT_LOGGING
6164 0 : nsDisplayBlendContainer::~nsDisplayBlendContainer() {
6165 0 : MOZ_COUNT_DTOR(nsDisplayBlendContainer);
6166 0 : }
6167 : #endif
6168 :
6169 : // nsDisplayBlendContainer uses layers for rendering
6170 : already_AddRefed<Layer>
6171 0 : nsDisplayBlendContainer::BuildLayer(nsDisplayListBuilder* aBuilder,
6172 : LayerManager* aManager,
6173 : const ContainerLayerParameters& aContainerParameters) {
6174 : // turn off anti-aliasing in the parent stacking context because it changes
6175 : // how the group is initialized.
6176 0 : ContainerLayerParameters newContainerParameters = aContainerParameters;
6177 0 : newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
6178 :
6179 : RefPtr<Layer> container = aManager->GetLayerBuilder()->
6180 0 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
6181 0 : newContainerParameters, nullptr);
6182 0 : if (!container) {
6183 0 : return nullptr;
6184 : }
6185 :
6186 0 : container->SetForceIsolatedGroup(true);
6187 0 : return container.forget();
6188 : }
6189 :
6190 : LayerState
6191 0 : nsDisplayBlendContainer::GetLayerState(nsDisplayListBuilder* aBuilder,
6192 : LayerManager* aManager,
6193 : const ContainerLayerParameters& aParameters)
6194 : {
6195 0 : return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, mList, GetAnimatedGeometryRoot());
6196 : }
6197 :
6198 0 : bool nsDisplayBlendContainer::TryMerge(nsDisplayItem* aItem) {
6199 0 : if (aItem->GetType() != TYPE_BLEND_CONTAINER)
6200 0 : return false;
6201 : // items for the same content element should be merged into a single
6202 : // compositing group
6203 : // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplayOpacity
6204 0 : if (aItem->Frame()->GetContent() != mFrame->GetContent())
6205 0 : return false;
6206 0 : if (aItem->GetClipChain() != GetClipChain())
6207 0 : return false;
6208 0 : MergeFromTrackingMergedFrames(static_cast<nsDisplayBlendContainer*>(aItem));
6209 0 : return true;
6210 : }
6211 :
6212 37 : nsDisplayOwnLayer::nsDisplayOwnLayer(nsDisplayListBuilder* aBuilder,
6213 : nsIFrame* aFrame, nsDisplayList* aList,
6214 : const ActiveScrolledRoot* aActiveScrolledRoot,
6215 : uint32_t aFlags, ViewID aScrollTarget,
6216 : const ScrollThumbData& aThumbData,
6217 37 : bool aForceActive)
6218 : : nsDisplayWrapList(aBuilder, aFrame, aList, aActiveScrolledRoot)
6219 : , mFlags(aFlags)
6220 : , mScrollTarget(aScrollTarget)
6221 : , mThumbData(aThumbData)
6222 37 : , mForceActive(aForceActive)
6223 : {
6224 37 : MOZ_COUNT_CTOR(nsDisplayOwnLayer);
6225 :
6226 : // For scroll thumb layers, override the AGR to be the thumb's AGR rather
6227 : // than the AGR for mFrame (which is the slider frame).
6228 37 : if (IsScrollThumbLayer()) {
6229 0 : if (nsIFrame* thumbFrame = nsBox::GetChildXULBox(mFrame)) {
6230 0 : mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(thumbFrame);
6231 : }
6232 : }
6233 37 : }
6234 :
6235 : #ifdef NS_BUILD_REFCNT_LOGGING
6236 74 : nsDisplayOwnLayer::~nsDisplayOwnLayer() {
6237 37 : MOZ_COUNT_DTOR(nsDisplayOwnLayer);
6238 37 : }
6239 : #endif
6240 :
6241 : LayerState
6242 56 : nsDisplayOwnLayer::GetLayerState(nsDisplayListBuilder* aBuilder,
6243 : LayerManager* aManager,
6244 : const ContainerLayerParameters& aParameters)
6245 : {
6246 56 : if (mForceActive) {
6247 56 : return mozilla::LAYER_ACTIVE_FORCE;
6248 : }
6249 :
6250 0 : return RequiredLayerStateForChildren(aBuilder, aManager, aParameters, mList, mAnimatedGeometryRoot);
6251 : }
6252 :
6253 : bool
6254 65 : nsDisplayOwnLayer::IsScrollThumbLayer() const
6255 : {
6256 65 : return (mFlags & VERTICAL_SCROLLBAR) || (mFlags & HORIZONTAL_SCROLLBAR);
6257 : }
6258 :
6259 : bool
6260 0 : nsDisplayOwnLayer::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder)
6261 : {
6262 : // Render scroll thumb layers even if they are invisible, because async
6263 : // scrolling might bring them into view.
6264 0 : return IsScrollThumbLayer();
6265 : }
6266 :
6267 : // nsDisplayOpacity uses layers for rendering
6268 : already_AddRefed<Layer>
6269 28 : nsDisplayOwnLayer::BuildLayer(nsDisplayListBuilder* aBuilder,
6270 : LayerManager* aManager,
6271 : const ContainerLayerParameters& aContainerParameters)
6272 : {
6273 : RefPtr<ContainerLayer> layer = aManager->GetLayerBuilder()->
6274 56 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
6275 : aContainerParameters, nullptr,
6276 56 : FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR);
6277 28 : if (mThumbData.mDirection != ScrollDirection::NONE) {
6278 0 : layer->SetScrollThumbData(mScrollTarget, mThumbData);
6279 : }
6280 28 : if (mFlags & SCROLLBAR_CONTAINER) {
6281 0 : layer->SetIsScrollbarContainer(mScrollTarget);
6282 : }
6283 :
6284 28 : if (mFlags & GENERATE_SUBDOC_INVALIDATIONS) {
6285 0 : mFrame->PresContext()->SetNotifySubDocInvalidationData(layer);
6286 : }
6287 56 : return layer.forget();
6288 : }
6289 :
6290 0 : nsDisplaySubDocument::nsDisplaySubDocument(nsDisplayListBuilder* aBuilder,
6291 : nsIFrame* aFrame, nsDisplayList* aList,
6292 0 : uint32_t aFlags)
6293 : : nsDisplayOwnLayer(aBuilder, aFrame, aList, aBuilder->CurrentActiveScrolledRoot(), aFlags)
6294 0 : , mScrollParentId(aBuilder->GetCurrentScrollParentId())
6295 : {
6296 0 : MOZ_COUNT_CTOR(nsDisplaySubDocument);
6297 0 : mForceDispatchToContentRegion =
6298 0 : aBuilder->IsBuildingLayerEventRegions() &&
6299 0 : nsLayoutUtils::HasDocumentLevelListenersForApzAwareEvents(aFrame->PresContext()->PresShell());
6300 :
6301 : // The SubDocument display item is conceptually outside the viewport frame,
6302 : // so in cases where the viewport frame is an AGR, the SubDocument's AGR
6303 : // should be not the viewport frame itself, but its parent AGR.
6304 0 : if (*mAnimatedGeometryRoot == mFrame && mAnimatedGeometryRoot->mParentAGR) {
6305 0 : mAnimatedGeometryRoot = mAnimatedGeometryRoot->mParentAGR;
6306 : }
6307 0 : }
6308 :
6309 : #ifdef NS_BUILD_REFCNT_LOGGING
6310 0 : nsDisplaySubDocument::~nsDisplaySubDocument() {
6311 0 : MOZ_COUNT_DTOR(nsDisplaySubDocument);
6312 0 : }
6313 : #endif
6314 :
6315 : already_AddRefed<Layer>
6316 0 : nsDisplaySubDocument::BuildLayer(nsDisplayListBuilder* aBuilder,
6317 : LayerManager* aManager,
6318 : const ContainerLayerParameters& aContainerParameters) {
6319 0 : nsPresContext* presContext = mFrame->PresContext();
6320 0 : nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame();
6321 0 : ContainerLayerParameters params = aContainerParameters;
6322 0 : if ((mFlags & GENERATE_SCROLLABLE_LAYER) &&
6323 0 : rootScrollFrame->GetContent() &&
6324 0 : nsLayoutUtils::HasCriticalDisplayPort(rootScrollFrame->GetContent())) {
6325 0 : params.mInLowPrecisionDisplayPort = true;
6326 : }
6327 :
6328 0 : RefPtr<Layer> layer = nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, params);
6329 0 : layer->AsContainerLayer()->SetEventRegionsOverride(mForceDispatchToContentRegion
6330 : ? EventRegionsOverride::ForceDispatchToContent
6331 0 : : EventRegionsOverride::NoOverride);
6332 0 : return layer.forget();
6333 : }
6334 :
6335 : UniquePtr<ScrollMetadata>
6336 0 : nsDisplaySubDocument::ComputeScrollMetadata(Layer* aLayer,
6337 : const ContainerLayerParameters& aContainerParameters)
6338 : {
6339 0 : if (!(mFlags & GENERATE_SCROLLABLE_LAYER)) {
6340 0 : return UniquePtr<ScrollMetadata>(nullptr);
6341 : }
6342 :
6343 0 : nsPresContext* presContext = mFrame->PresContext();
6344 0 : nsIFrame* rootScrollFrame = presContext->PresShell()->GetRootScrollFrame();
6345 0 : bool isRootContentDocument = presContext->IsRootContentDocument();
6346 0 : nsIPresShell* presShell = presContext->PresShell();
6347 : ContainerLayerParameters params(
6348 0 : aContainerParameters.mXScale * presShell->GetResolution(),
6349 0 : aContainerParameters.mYScale * presShell->GetResolution(),
6350 0 : nsIntPoint(), aContainerParameters);
6351 0 : if ((mFlags & GENERATE_SCROLLABLE_LAYER) &&
6352 0 : rootScrollFrame->GetContent() &&
6353 0 : nsLayoutUtils::HasCriticalDisplayPort(rootScrollFrame->GetContent())) {
6354 0 : params.mInLowPrecisionDisplayPort = true;
6355 : }
6356 :
6357 0 : nsRect viewport = mFrame->GetRect() -
6358 0 : mFrame->GetPosition() +
6359 0 : mFrame->GetOffsetToCrossDoc(ReferenceFrame());
6360 :
6361 : return MakeUnique<ScrollMetadata>(
6362 0 : nsLayoutUtils::ComputeScrollMetadata(
6363 : mFrame, rootScrollFrame, rootScrollFrame->GetContent(), ReferenceFrame(),
6364 0 : aLayer, mScrollParentId, viewport, Nothing(),
6365 0 : isRootContentDocument, params));
6366 : }
6367 :
6368 : static bool
6369 0 : UseDisplayPortForViewport(nsDisplayListBuilder* aBuilder, nsIFrame* aFrame)
6370 : {
6371 0 : return aBuilder->IsPaintingToWindow() &&
6372 0 : nsLayoutUtils::ViewportHasDisplayPort(aFrame->PresContext());
6373 : }
6374 :
6375 : nsRect
6376 0 : nsDisplaySubDocument::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
6377 : {
6378 0 : bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame);
6379 :
6380 0 : if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) {
6381 0 : *aSnap = false;
6382 0 : return mFrame->GetRect() + aBuilder->ToReferenceFrame(mFrame);
6383 : }
6384 :
6385 0 : return nsDisplayOwnLayer::GetBounds(aBuilder, aSnap);
6386 : }
6387 :
6388 : bool
6389 0 : nsDisplaySubDocument::ComputeVisibility(nsDisplayListBuilder* aBuilder,
6390 : nsRegion* aVisibleRegion)
6391 : {
6392 0 : bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame);
6393 :
6394 0 : if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) {
6395 0 : return nsDisplayWrapList::ComputeVisibility(aBuilder, aVisibleRegion);
6396 : }
6397 :
6398 0 : nsRect displayport;
6399 0 : nsIFrame* rootScrollFrame = mFrame->PresContext()->PresShell()->GetRootScrollFrame();
6400 0 : MOZ_ASSERT(rootScrollFrame);
6401 0 : Unused << nsLayoutUtils::GetDisplayPort(rootScrollFrame->GetContent(), &displayport,
6402 : RelativeTo::ScrollFrame);
6403 :
6404 0 : nsRegion childVisibleRegion;
6405 : // The visible region for the children may be much bigger than the hole we
6406 : // are viewing the children from, so that the compositor process has enough
6407 : // content to asynchronously pan while content is being refreshed.
6408 0 : childVisibleRegion = displayport + mFrame->GetOffsetToCrossDoc(ReferenceFrame());
6409 :
6410 : nsRect boundedRect =
6411 0 : childVisibleRegion.GetBounds().Intersect(
6412 0 : mList.GetClippedBoundsWithRespectToASR(aBuilder, mActiveScrolledRoot));
6413 0 : bool visible = mList.ComputeVisibilityForSublist(
6414 0 : aBuilder, &childVisibleRegion, boundedRect);
6415 :
6416 : // If APZ is enabled then don't allow this computation to influence
6417 : // aVisibleRegion, on the assumption that the layer can be asynchronously
6418 : // scrolled so we'll definitely need all the content under it.
6419 0 : if (!nsLayoutUtils::UsesAsyncScrolling(mFrame)) {
6420 : bool snap;
6421 0 : nsRect bounds = GetBounds(aBuilder, &snap);
6422 0 : nsRegion removed;
6423 0 : removed.Sub(bounds, childVisibleRegion);
6424 :
6425 0 : aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
6426 : }
6427 :
6428 0 : return visible;
6429 : }
6430 :
6431 : bool
6432 0 : nsDisplaySubDocument::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder)
6433 : {
6434 0 : bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame);
6435 :
6436 0 : if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) {
6437 0 : return true;
6438 : }
6439 :
6440 0 : return nsDisplayOwnLayer::ShouldBuildLayerEvenIfInvisible(aBuilder);
6441 : }
6442 :
6443 : nsRegion
6444 0 : nsDisplaySubDocument::GetOpaqueRegion(nsDisplayListBuilder* aBuilder, bool* aSnap)
6445 : {
6446 0 : bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame);
6447 :
6448 0 : if ((mFlags & GENERATE_SCROLLABLE_LAYER) && usingDisplayPort) {
6449 0 : *aSnap = false;
6450 0 : return nsRegion();
6451 : }
6452 :
6453 0 : return nsDisplayOwnLayer::GetOpaqueRegion(aBuilder, aSnap);
6454 : }
6455 :
6456 0 : nsDisplayResolution::nsDisplayResolution(nsDisplayListBuilder* aBuilder,
6457 : nsIFrame* aFrame, nsDisplayList* aList,
6458 0 : uint32_t aFlags)
6459 0 : : nsDisplaySubDocument(aBuilder, aFrame, aList, aFlags) {
6460 0 : MOZ_COUNT_CTOR(nsDisplayResolution);
6461 0 : }
6462 :
6463 : #ifdef NS_BUILD_REFCNT_LOGGING
6464 0 : nsDisplayResolution::~nsDisplayResolution() {
6465 0 : MOZ_COUNT_DTOR(nsDisplayResolution);
6466 0 : }
6467 : #endif
6468 :
6469 : void
6470 0 : nsDisplayResolution::HitTest(nsDisplayListBuilder* aBuilder,
6471 : const nsRect& aRect,
6472 : HitTestState* aState,
6473 : nsTArray<nsIFrame*> *aOutFrames)
6474 : {
6475 0 : nsIPresShell* presShell = mFrame->PresContext()->PresShell();
6476 0 : nsRect rect = aRect.RemoveResolution(presShell->ScaleToResolution() ? presShell->GetResolution () : 1.0f);
6477 0 : mList.HitTest(aBuilder, rect, aState, aOutFrames);
6478 0 : }
6479 :
6480 : already_AddRefed<Layer>
6481 0 : nsDisplayResolution::BuildLayer(nsDisplayListBuilder* aBuilder,
6482 : LayerManager* aManager,
6483 : const ContainerLayerParameters& aContainerParameters) {
6484 0 : nsIPresShell* presShell = mFrame->PresContext()->PresShell();
6485 : ContainerLayerParameters containerParameters(
6486 0 : presShell->GetResolution(), presShell->GetResolution(), nsIntPoint(),
6487 0 : aContainerParameters);
6488 :
6489 0 : RefPtr<Layer> layer = nsDisplaySubDocument::BuildLayer(
6490 0 : aBuilder, aManager, containerParameters);
6491 0 : layer->SetPostScale(1.0f / presShell->GetResolution(),
6492 0 : 1.0f / presShell->GetResolution());
6493 0 : layer->AsContainerLayer()->SetScaleToResolution(
6494 0 : presShell->ScaleToResolution(), presShell->GetResolution());
6495 0 : return layer.forget();
6496 : }
6497 :
6498 0 : nsDisplayFixedPosition::nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder,
6499 : nsIFrame* aFrame,
6500 : nsDisplayList* aList,
6501 0 : const ActiveScrolledRoot* aActiveScrolledRoot)
6502 : : nsDisplayOwnLayer(aBuilder, aFrame, aList, aActiveScrolledRoot)
6503 : , mIndex(0)
6504 0 : , mIsFixedBackground(false)
6505 : {
6506 0 : MOZ_COUNT_CTOR(nsDisplayFixedPosition);
6507 0 : Init(aBuilder);
6508 0 : }
6509 :
6510 0 : nsDisplayFixedPosition::nsDisplayFixedPosition(nsDisplayListBuilder* aBuilder,
6511 : nsIFrame* aFrame,
6512 : nsDisplayList* aList,
6513 0 : uint32_t aIndex)
6514 : : nsDisplayOwnLayer(aBuilder, aFrame, aList, aBuilder->CurrentActiveScrolledRoot())
6515 : , mIndex(aIndex)
6516 0 : , mIsFixedBackground(true)
6517 : {
6518 0 : MOZ_COUNT_CTOR(nsDisplayFixedPosition);
6519 0 : Init(aBuilder);
6520 0 : }
6521 :
6522 : void
6523 0 : nsDisplayFixedPosition::Init(nsDisplayListBuilder* aBuilder)
6524 : {
6525 0 : mAnimatedGeometryRootForScrollMetadata = mAnimatedGeometryRoot;
6526 0 : if (ShouldFixToViewport(aBuilder)) {
6527 0 : mAnimatedGeometryRoot = aBuilder->FindAnimatedGeometryRootFor(this);
6528 : }
6529 0 : }
6530 :
6531 : /* static */ nsDisplayFixedPosition*
6532 0 : nsDisplayFixedPosition::CreateForFixedBackground(nsDisplayListBuilder* aBuilder,
6533 : nsIFrame* aFrame,
6534 : nsDisplayBackgroundImage* aImage,
6535 : uint32_t aIndex)
6536 : {
6537 0 : nsDisplayList temp;
6538 0 : temp.AppendToTop(aImage);
6539 :
6540 0 : return new (aBuilder) nsDisplayFixedPosition(aBuilder, aFrame, &temp, aIndex + 1);
6541 : }
6542 :
6543 :
6544 : #ifdef NS_BUILD_REFCNT_LOGGING
6545 0 : nsDisplayFixedPosition::~nsDisplayFixedPosition() {
6546 0 : MOZ_COUNT_DTOR(nsDisplayFixedPosition);
6547 0 : }
6548 : #endif
6549 :
6550 : already_AddRefed<Layer>
6551 0 : nsDisplayFixedPosition::BuildLayer(nsDisplayListBuilder* aBuilder,
6552 : LayerManager* aManager,
6553 : const ContainerLayerParameters& aContainerParameters) {
6554 : RefPtr<Layer> layer =
6555 0 : nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, aContainerParameters);
6556 :
6557 0 : layer->SetIsFixedPosition(true);
6558 :
6559 0 : nsPresContext* presContext = mFrame->PresContext();
6560 0 : nsIFrame* fixedFrame = mIsFixedBackground ? presContext->PresShell()->GetRootFrame() : mFrame;
6561 :
6562 0 : const nsIFrame* viewportFrame = fixedFrame->GetParent();
6563 : // anchorRect will be in the container's coordinate system (aLayer's parent layer).
6564 : // This is the same as the display items' reference frame.
6565 0 : nsRect anchorRect;
6566 0 : if (viewportFrame) {
6567 : // Fixed position frames are reflowed into the scroll-port size if one has
6568 : // been set.
6569 0 : if (presContext->PresShell()->IsScrollPositionClampingScrollPortSizeSet()) {
6570 0 : anchorRect.SizeTo(presContext->PresShell()->GetScrollPositionClampingScrollPortSize());
6571 : } else {
6572 0 : anchorRect.SizeTo(viewportFrame->GetSize());
6573 : }
6574 : } else {
6575 : // A display item directly attached to the viewport.
6576 : // For background-attachment:fixed items, the anchor point is always the
6577 : // top-left of the viewport currently.
6578 0 : viewportFrame = fixedFrame;
6579 : }
6580 : // The anchorRect top-left is always the viewport top-left.
6581 0 : anchorRect.MoveTo(viewportFrame->GetOffsetToCrossDoc(ReferenceFrame()));
6582 :
6583 0 : nsLayoutUtils::SetFixedPositionLayerData(layer,
6584 0 : viewportFrame, anchorRect, fixedFrame, presContext, aContainerParameters);
6585 :
6586 0 : return layer.forget();
6587 : }
6588 :
6589 0 : bool nsDisplayFixedPosition::TryMerge(nsDisplayItem* aItem) {
6590 0 : if (aItem->GetType() != TYPE_FIXED_POSITION)
6591 0 : return false;
6592 : // Items with the same fixed position frame can be merged.
6593 0 : nsDisplayFixedPosition* other = static_cast<nsDisplayFixedPosition*>(aItem);
6594 0 : if (other->mFrame != mFrame)
6595 0 : return false;
6596 0 : if (aItem->GetClipChain() != GetClipChain())
6597 0 : return false;
6598 0 : MergeFromTrackingMergedFrames(other);
6599 0 : return true;
6600 : }
6601 :
6602 : TableType
6603 0 : GetTableTypeFromFrame(nsIFrame* aFrame)
6604 : {
6605 0 : if (aFrame->IsTableFrame()) {
6606 0 : return TableType::TABLE;
6607 : }
6608 :
6609 0 : if (aFrame->IsTableColFrame()) {
6610 0 : return TableType::TABLE_COL;
6611 : }
6612 :
6613 0 : if (aFrame->IsTableColGroupFrame()) {
6614 0 : return TableType::TABLE_COL_GROUP;
6615 : }
6616 :
6617 0 : if (aFrame->IsTableRowFrame()) {
6618 0 : return TableType::TABLE_ROW;
6619 : }
6620 :
6621 0 : if (aFrame->IsTableRowGroupFrame()) {
6622 0 : return TableType::TABLE_ROW_GROUP;
6623 : }
6624 :
6625 0 : if (aFrame->IsTableCellFrame()) {
6626 0 : return TableType::TABLE_CELL;
6627 : }
6628 :
6629 0 : MOZ_ASSERT_UNREACHABLE("Invalid frame.");
6630 : return TableType::TABLE;
6631 : }
6632 :
6633 0 : nsDisplayTableFixedPosition::nsDisplayTableFixedPosition(nsDisplayListBuilder* aBuilder,
6634 : nsIFrame* aFrame,
6635 : nsDisplayList* aList,
6636 : uint32_t aIndex,
6637 0 : nsIFrame* aAncestorFrame)
6638 : : nsDisplayFixedPosition(aBuilder, aFrame, aList, aIndex)
6639 0 : , mTableType(GetTableTypeFromFrame(aAncestorFrame))
6640 : {
6641 0 : }
6642 :
6643 : /* static */ nsDisplayTableFixedPosition*
6644 0 : nsDisplayTableFixedPosition::CreateForFixedBackground(nsDisplayListBuilder* aBuilder,
6645 : nsIFrame* aFrame,
6646 : nsDisplayBackgroundImage* aImage,
6647 : uint32_t aIndex,
6648 : nsIFrame* aAncestorFrame)
6649 : {
6650 0 : nsDisplayList temp;
6651 0 : temp.AppendToTop(aImage);
6652 :
6653 0 : return new (aBuilder) nsDisplayTableFixedPosition(aBuilder, aFrame, &temp, aIndex + 1, aAncestorFrame);
6654 : }
6655 :
6656 0 : nsDisplayStickyPosition::nsDisplayStickyPosition(nsDisplayListBuilder* aBuilder,
6657 : nsIFrame* aFrame,
6658 : nsDisplayList* aList,
6659 0 : const ActiveScrolledRoot* aActiveScrolledRoot)
6660 0 : : nsDisplayOwnLayer(aBuilder, aFrame, aList, aActiveScrolledRoot)
6661 : {
6662 0 : MOZ_COUNT_CTOR(nsDisplayStickyPosition);
6663 0 : mClip = nullptr;
6664 0 : }
6665 :
6666 : void
6667 0 : nsDisplayStickyPosition::SetClipChain(const DisplayItemClipChain* aClipChain)
6668 : {
6669 0 : mClipChain = aClipChain;
6670 0 : MOZ_ASSERT(!mClip, "There should never be a clip on this item because no clip moves with it.");
6671 0 : }
6672 :
6673 : #ifdef NS_BUILD_REFCNT_LOGGING
6674 0 : nsDisplayStickyPosition::~nsDisplayStickyPosition() {
6675 0 : MOZ_COUNT_DTOR(nsDisplayStickyPosition);
6676 0 : }
6677 : #endif
6678 :
6679 : already_AddRefed<Layer>
6680 0 : nsDisplayStickyPosition::BuildLayer(nsDisplayListBuilder* aBuilder,
6681 : LayerManager* aManager,
6682 : const ContainerLayerParameters& aContainerParameters) {
6683 : RefPtr<Layer> layer =
6684 0 : nsDisplayOwnLayer::BuildLayer(aBuilder, aManager, aContainerParameters);
6685 :
6686 : StickyScrollContainer* stickyScrollContainer = StickyScrollContainer::
6687 0 : GetStickyScrollContainerForFrame(mFrame);
6688 0 : if (!stickyScrollContainer) {
6689 0 : return layer.forget();
6690 : }
6691 :
6692 0 : nsIFrame* scrollFrame = do_QueryFrame(stickyScrollContainer->ScrollFrame());
6693 0 : nsPresContext* presContext = scrollFrame->PresContext();
6694 :
6695 : // Sticky position frames whose scroll frame is the root scroll frame are
6696 : // reflowed into the scroll-port size if one has been set.
6697 0 : nsSize scrollFrameSize = scrollFrame->GetSize();
6698 0 : if (scrollFrame == presContext->PresShell()->GetRootScrollFrame() &&
6699 0 : presContext->PresShell()->IsScrollPositionClampingScrollPortSizeSet()) {
6700 : scrollFrameSize = presContext->PresShell()->
6701 0 : GetScrollPositionClampingScrollPortSize();
6702 : }
6703 :
6704 0 : nsLayoutUtils::SetFixedPositionLayerData(layer, scrollFrame,
6705 0 : nsRect(scrollFrame->GetOffsetToCrossDoc(ReferenceFrame()), scrollFrameSize),
6706 0 : mFrame, presContext, aContainerParameters);
6707 :
6708 0 : ViewID scrollId = nsLayoutUtils::FindOrCreateIDFor(
6709 0 : stickyScrollContainer->ScrollFrame()->GetScrolledFrame()->GetContent());
6710 :
6711 0 : float factor = presContext->AppUnitsPerDevPixel();
6712 0 : nsRect outer;
6713 0 : nsRect inner;
6714 0 : stickyScrollContainer->GetScrollRanges(mFrame, &outer, &inner);
6715 0 : LayerRect stickyOuter(NSAppUnitsToFloatPixels(outer.x, factor) *
6716 0 : aContainerParameters.mXScale,
6717 0 : NSAppUnitsToFloatPixels(outer.y, factor) *
6718 0 : aContainerParameters.mYScale,
6719 0 : NSAppUnitsToFloatPixels(outer.width, factor) *
6720 0 : aContainerParameters.mXScale,
6721 0 : NSAppUnitsToFloatPixels(outer.height, factor) *
6722 0 : aContainerParameters.mYScale);
6723 0 : LayerRect stickyInner(NSAppUnitsToFloatPixels(inner.x, factor) *
6724 0 : aContainerParameters.mXScale,
6725 0 : NSAppUnitsToFloatPixels(inner.y, factor) *
6726 0 : aContainerParameters.mYScale,
6727 0 : NSAppUnitsToFloatPixels(inner.width, factor) *
6728 0 : aContainerParameters.mXScale,
6729 0 : NSAppUnitsToFloatPixels(inner.height, factor) *
6730 0 : aContainerParameters.mYScale);
6731 0 : layer->SetStickyPositionData(scrollId, stickyOuter, stickyInner);
6732 :
6733 0 : return layer.forget();
6734 : }
6735 :
6736 0 : bool nsDisplayStickyPosition::TryMerge(nsDisplayItem* aItem) {
6737 0 : if (aItem->GetType() != TYPE_STICKY_POSITION)
6738 0 : return false;
6739 : // Items with the same fixed position frame can be merged.
6740 0 : nsDisplayStickyPosition* other = static_cast<nsDisplayStickyPosition*>(aItem);
6741 0 : if (other->mFrame != mFrame)
6742 0 : return false;
6743 0 : if (aItem->GetClipChain() != GetClipChain())
6744 0 : return false;
6745 0 : MergeFromTrackingMergedFrames(other);
6746 0 : return true;
6747 : }
6748 :
6749 0 : nsDisplayScrollInfoLayer::nsDisplayScrollInfoLayer(
6750 : nsDisplayListBuilder* aBuilder,
6751 : nsIFrame* aScrolledFrame,
6752 0 : nsIFrame* aScrollFrame)
6753 : : nsDisplayWrapList(aBuilder, aScrollFrame)
6754 : , mScrollFrame(aScrollFrame)
6755 : , mScrolledFrame(aScrolledFrame)
6756 0 : , mScrollParentId(aBuilder->GetCurrentScrollParentId())
6757 : {
6758 : #ifdef NS_BUILD_REFCNT_LOGGING
6759 0 : MOZ_COUNT_CTOR(nsDisplayScrollInfoLayer);
6760 : #endif
6761 0 : }
6762 :
6763 : #ifdef NS_BUILD_REFCNT_LOGGING
6764 0 : nsDisplayScrollInfoLayer::~nsDisplayScrollInfoLayer()
6765 : {
6766 0 : MOZ_COUNT_DTOR(nsDisplayScrollInfoLayer);
6767 0 : }
6768 : #endif
6769 :
6770 : already_AddRefed<Layer>
6771 0 : nsDisplayScrollInfoLayer::BuildLayer(nsDisplayListBuilder* aBuilder,
6772 : LayerManager* aManager,
6773 : const ContainerLayerParameters& aContainerParameters)
6774 : {
6775 : // In general for APZ with event-regions we no longer have a need for
6776 : // scrollinfo layers. However, in some cases, there might be content that
6777 : // cannot be layerized, and so needs to scroll synchronously. To handle those
6778 : // cases, we still want to generate scrollinfo layers.
6779 :
6780 0 : ContainerLayerParameters params = aContainerParameters;
6781 0 : if (mScrolledFrame->GetContent() &&
6782 0 : nsLayoutUtils::HasCriticalDisplayPort(mScrolledFrame->GetContent())) {
6783 0 : params.mInLowPrecisionDisplayPort = true;
6784 : }
6785 :
6786 : return aManager->GetLayerBuilder()->
6787 0 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
6788 : params, nullptr,
6789 0 : FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR);
6790 : }
6791 :
6792 : LayerState
6793 0 : nsDisplayScrollInfoLayer::GetLayerState(nsDisplayListBuilder* aBuilder,
6794 : LayerManager* aManager,
6795 : const ContainerLayerParameters& aParameters)
6796 : {
6797 0 : return LAYER_ACTIVE_EMPTY;
6798 : }
6799 :
6800 : UniquePtr<ScrollMetadata>
6801 0 : nsDisplayScrollInfoLayer::ComputeScrollMetadata(Layer* aLayer,
6802 : const ContainerLayerParameters& aContainerParameters)
6803 : {
6804 0 : ContainerLayerParameters params = aContainerParameters;
6805 0 : if (mScrolledFrame->GetContent() &&
6806 0 : nsLayoutUtils::HasCriticalDisplayPort(mScrolledFrame->GetContent())) {
6807 0 : params.mInLowPrecisionDisplayPort = true;
6808 : }
6809 :
6810 0 : nsRect viewport = mScrollFrame->GetRect() -
6811 0 : mScrollFrame->GetPosition() +
6812 0 : mScrollFrame->GetOffsetToCrossDoc(ReferenceFrame());
6813 :
6814 : ScrollMetadata metadata = nsLayoutUtils::ComputeScrollMetadata(
6815 0 : mScrolledFrame, mScrollFrame, mScrollFrame->GetContent(),
6816 : ReferenceFrame(), aLayer,
6817 0 : mScrollParentId, viewport, Nothing(), false, params);
6818 0 : metadata.GetMetrics().SetIsScrollInfoLayer(true);
6819 :
6820 0 : return UniquePtr<ScrollMetadata>(new ScrollMetadata(metadata));
6821 : }
6822 :
6823 :
6824 :
6825 : void
6826 0 : nsDisplayScrollInfoLayer::WriteDebugInfo(std::stringstream& aStream)
6827 : {
6828 0 : aStream << " (scrollframe " << mScrollFrame
6829 0 : << " scrolledFrame " << mScrolledFrame << ")";
6830 0 : }
6831 :
6832 0 : nsDisplayZoom::nsDisplayZoom(nsDisplayListBuilder* aBuilder,
6833 : nsIFrame* aFrame, nsDisplayList* aList,
6834 : int32_t aAPD, int32_t aParentAPD,
6835 0 : uint32_t aFlags)
6836 : : nsDisplaySubDocument(aBuilder, aFrame, aList, aFlags)
6837 0 : , mAPD(aAPD), mParentAPD(aParentAPD) {
6838 0 : MOZ_COUNT_CTOR(nsDisplayZoom);
6839 0 : }
6840 :
6841 : #ifdef NS_BUILD_REFCNT_LOGGING
6842 0 : nsDisplayZoom::~nsDisplayZoom() {
6843 0 : MOZ_COUNT_DTOR(nsDisplayZoom);
6844 0 : }
6845 : #endif
6846 :
6847 0 : nsRect nsDisplayZoom::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
6848 : {
6849 0 : nsRect bounds = nsDisplaySubDocument::GetBounds(aBuilder, aSnap);
6850 0 : *aSnap = false;
6851 0 : return bounds.ScaleToOtherAppUnitsRoundOut(mAPD, mParentAPD);
6852 : }
6853 :
6854 0 : void nsDisplayZoom::HitTest(nsDisplayListBuilder *aBuilder,
6855 : const nsRect& aRect,
6856 : HitTestState *aState,
6857 : nsTArray<nsIFrame*> *aOutFrames)
6858 : {
6859 0 : nsRect rect;
6860 : // A 1x1 rect indicates we are just hit testing a point, so pass down a 1x1
6861 : // rect as well instead of possibly rounding the width or height to zero.
6862 0 : if (aRect.width == 1 && aRect.height == 1) {
6863 0 : rect.MoveTo(aRect.TopLeft().ScaleToOtherAppUnits(mParentAPD, mAPD));
6864 0 : rect.width = rect.height = 1;
6865 : } else {
6866 0 : rect = aRect.ScaleToOtherAppUnitsRoundOut(mParentAPD, mAPD);
6867 : }
6868 0 : mList.HitTest(aBuilder, rect, aState, aOutFrames);
6869 0 : }
6870 :
6871 0 : bool nsDisplayZoom::ComputeVisibility(nsDisplayListBuilder *aBuilder,
6872 : nsRegion *aVisibleRegion)
6873 : {
6874 : // Convert the passed in visible region to our appunits.
6875 0 : nsRegion visibleRegion;
6876 : // mVisibleRect has been clipped to GetClippedBounds
6877 0 : visibleRegion.And(*aVisibleRegion, mVisibleRect);
6878 0 : visibleRegion = visibleRegion.ScaleToOtherAppUnitsRoundOut(mParentAPD, mAPD);
6879 0 : nsRegion originalVisibleRegion = visibleRegion;
6880 :
6881 : nsRect transformedVisibleRect =
6882 0 : mVisibleRect.ScaleToOtherAppUnitsRoundOut(mParentAPD, mAPD);
6883 : bool retval;
6884 : // If we are to generate a scrollable layer we call
6885 : // nsDisplaySubDocument::ComputeVisibility to make the necessary adjustments
6886 : // for ComputeVisibility, it does all it's calculations in the child APD.
6887 0 : bool usingDisplayPort = UseDisplayPortForViewport(aBuilder, mFrame);
6888 0 : if (!(mFlags & GENERATE_SCROLLABLE_LAYER) || !usingDisplayPort) {
6889 : retval =
6890 0 : mList.ComputeVisibilityForSublist(aBuilder, &visibleRegion,
6891 0 : transformedVisibleRect);
6892 : } else {
6893 : retval =
6894 0 : nsDisplaySubDocument::ComputeVisibility(aBuilder, &visibleRegion);
6895 : }
6896 :
6897 0 : nsRegion removed;
6898 : // removed = originalVisibleRegion - visibleRegion
6899 0 : removed.Sub(originalVisibleRegion, visibleRegion);
6900 : // Convert removed region to parent appunits.
6901 0 : removed = removed.ScaleToOtherAppUnitsRoundIn(mAPD, mParentAPD);
6902 : // aVisibleRegion = aVisibleRegion - removed (modulo any simplifications
6903 : // SubtractFromVisibleRegion does)
6904 0 : aBuilder->SubtractFromVisibleRegion(aVisibleRegion, removed);
6905 :
6906 0 : return retval;
6907 : }
6908 :
6909 : ///////////////////////////////////////////////////
6910 : // nsDisplayTransform Implementation
6911 : //
6912 :
6913 : // Write #define UNIFIED_CONTINUATIONS here and in
6914 : // TransformReferenceBox::Initialize to have the transform property try
6915 : // to transform content with continuations as one unified block instead of
6916 : // several smaller ones. This is currently disabled because it doesn't work
6917 : // correctly, since when the frames are initially being reflowed, their
6918 : // continuations all compute their bounding rects independently of each other
6919 : // and consequently get the wrong value. Write #define DEBUG_HIT here to have
6920 : // the nsDisplayTransform class dump out a bunch of information about hit
6921 : // detection.
6922 : #undef UNIFIED_CONTINUATIONS
6923 : #undef DEBUG_HIT
6924 :
6925 0 : nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder,
6926 : nsIFrame *aFrame, nsDisplayList *aList,
6927 : const nsRect& aChildrenVisibleRect,
6928 : ComputeTransformFunction aTransformGetter,
6929 0 : uint32_t aIndex)
6930 : : nsDisplayItem(aBuilder, aFrame)
6931 : , mStoredList(aBuilder, aFrame, aList)
6932 : , mTransformGetter(aTransformGetter)
6933 0 : , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot)
6934 0 : , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot)
6935 : , mChildrenVisibleRect(aChildrenVisibleRect)
6936 : , mIndex(aIndex)
6937 : , mNoExtendContext(false)
6938 : , mIsTransformSeparator(false)
6939 : , mTransformPreserves3DInited(false)
6940 0 : , mAllowAsyncAnimation(false)
6941 : {
6942 0 : MOZ_COUNT_CTOR(nsDisplayTransform);
6943 0 : MOZ_ASSERT(aFrame, "Must have a frame!");
6944 0 : Init(aBuilder);
6945 0 : }
6946 :
6947 : void
6948 24 : nsDisplayTransform::SetReferenceFrameToAncestor(nsDisplayListBuilder* aBuilder)
6949 : {
6950 24 : if (mFrame == aBuilder->RootReferenceFrame()) {
6951 0 : return;
6952 : }
6953 24 : nsIFrame *outerFrame = nsLayoutUtils::GetCrossDocParentFrame(mFrame);
6954 24 : mReferenceFrame =
6955 24 : aBuilder->FindReferenceFrameFor(outerFrame);
6956 24 : mToReferenceFrame = mFrame->GetOffsetToCrossDoc(mReferenceFrame);
6957 24 : if (nsLayoutUtils::IsFixedPosFrameInDisplayPort(mFrame)) {
6958 : // This is an odd special case. If we are both IsFixedPosFrameInDisplayPort
6959 : // and transformed that we are our own AGR parent.
6960 : // We want our frame to be our AGR because FrameLayerBuilder uses our AGR to
6961 : // determine if we are inside a fixed pos subtree. If we use the outer AGR
6962 : // from outside the fixed pos subtree FLB can't tell that we are fixed pos.
6963 0 : mAnimatedGeometryRoot = mAnimatedGeometryRootForChildren;
6964 24 : } else if (mFrame->StyleDisplay()->mPosition == NS_STYLE_POSITION_STICKY &&
6965 0 : IsStickyFrameActive(aBuilder, mFrame, nullptr)) {
6966 : // Similar to the IsFixedPosFrameInDisplayPort case we are our own AGR.
6967 : // We are inside the sticky position, so our AGR is the sticky positioned
6968 : // frame, which is our AGR, not the parent AGR.
6969 0 : mAnimatedGeometryRoot = mAnimatedGeometryRootForChildren;
6970 24 : } else if (mAnimatedGeometryRoot->mParentAGR) {
6971 0 : mAnimatedGeometryRootForScrollMetadata = mAnimatedGeometryRoot->mParentAGR;
6972 0 : if (!MayBeAnimated(aBuilder)) {
6973 : // If we're an animated transform then we want the same AGR as our children
6974 : // so that FrameLayerBuilder knows that this layer moves with the transform
6975 : // and won't compute occlusions. If we're not animated then use our parent
6976 : // AGR so that inactive transform layers can go in the same PaintedLayer as
6977 : // surrounding content.
6978 0 : mAnimatedGeometryRoot = mAnimatedGeometryRoot->mParentAGR;
6979 : }
6980 : }
6981 24 : mVisibleRect = aBuilder->GetDirtyRect() + mToReferenceFrame;
6982 : }
6983 :
6984 : void
6985 24 : nsDisplayTransform::Init(nsDisplayListBuilder* aBuilder)
6986 : {
6987 24 : mHasBounds = false;
6988 24 : mStoredList.SetClipChain(nullptr);
6989 24 : mStoredList.SetVisibleRect(mChildrenVisibleRect);
6990 24 : }
6991 :
6992 24 : nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder,
6993 : nsIFrame *aFrame, nsDisplayList *aList,
6994 : const nsRect& aChildrenVisibleRect,
6995 : uint32_t aIndex,
6996 24 : bool aAllowAsyncAnimation)
6997 : : nsDisplayItem(aBuilder, aFrame)
6998 : , mStoredList(aBuilder, aFrame, aList)
6999 : , mTransformGetter(nullptr)
7000 24 : , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot)
7001 24 : , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot)
7002 : , mChildrenVisibleRect(aChildrenVisibleRect)
7003 : , mIndex(aIndex)
7004 : , mNoExtendContext(false)
7005 : , mIsTransformSeparator(false)
7006 : , mTransformPreserves3DInited(false)
7007 72 : , mAllowAsyncAnimation(aAllowAsyncAnimation)
7008 : {
7009 24 : MOZ_COUNT_CTOR(nsDisplayTransform);
7010 24 : MOZ_ASSERT(aFrame, "Must have a frame!");
7011 24 : SetReferenceFrameToAncestor(aBuilder);
7012 24 : Init(aBuilder);
7013 24 : UpdateBoundsFor3D(aBuilder);
7014 24 : }
7015 :
7016 0 : nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder,
7017 : nsIFrame *aFrame, nsDisplayItem *aItem,
7018 : const nsRect& aChildrenVisibleRect,
7019 0 : uint32_t aIndex)
7020 : : nsDisplayItem(aBuilder, aFrame)
7021 : , mStoredList(aBuilder, aFrame, aItem)
7022 : , mTransformGetter(nullptr)
7023 0 : , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot)
7024 0 : , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot)
7025 : , mChildrenVisibleRect(aChildrenVisibleRect)
7026 : , mIndex(aIndex)
7027 : , mNoExtendContext(false)
7028 : , mIsTransformSeparator(false)
7029 : , mTransformPreserves3DInited(false)
7030 0 : , mAllowAsyncAnimation(false)
7031 : {
7032 0 : MOZ_COUNT_CTOR(nsDisplayTransform);
7033 0 : MOZ_ASSERT(aFrame, "Must have a frame!");
7034 0 : SetReferenceFrameToAncestor(aBuilder);
7035 0 : Init(aBuilder);
7036 0 : }
7037 :
7038 0 : nsDisplayTransform::nsDisplayTransform(nsDisplayListBuilder* aBuilder,
7039 : nsIFrame *aFrame, nsDisplayList *aList,
7040 : const nsRect& aChildrenVisibleRect,
7041 : const Matrix4x4& aTransform,
7042 0 : uint32_t aIndex)
7043 : : nsDisplayItem(aBuilder, aFrame)
7044 : , mStoredList(aBuilder, aFrame, aList)
7045 : , mTransform(aTransform)
7046 : , mTransformGetter(nullptr)
7047 0 : , mAnimatedGeometryRootForChildren(mAnimatedGeometryRoot)
7048 0 : , mAnimatedGeometryRootForScrollMetadata(mAnimatedGeometryRoot)
7049 : , mChildrenVisibleRect(aChildrenVisibleRect)
7050 : , mIndex(aIndex)
7051 : , mNoExtendContext(false)
7052 : , mIsTransformSeparator(true)
7053 : , mTransformPreserves3DInited(false)
7054 0 : , mAllowAsyncAnimation(false)
7055 : {
7056 0 : MOZ_COUNT_CTOR(nsDisplayTransform);
7057 0 : MOZ_ASSERT(aFrame, "Must have a frame!");
7058 0 : Init(aBuilder);
7059 0 : UpdateBoundsFor3D(aBuilder);
7060 0 : }
7061 :
7062 : /* Returns the delta specified by the transform-origin property.
7063 : * This is a positive delta, meaning that it indicates the direction to move
7064 : * to get from (0, 0) of the frame to the transform origin. This function is
7065 : * called off the main thread.
7066 : */
7067 : /* static */ Point3D
7068 194 : nsDisplayTransform::GetDeltaToTransformOrigin(const nsIFrame* aFrame,
7069 : float aAppUnitsPerPixel,
7070 : const nsRect* aBoundsOverride)
7071 : {
7072 194 : NS_PRECONDITION(aFrame, "Can't get delta for a null frame!");
7073 194 : NS_PRECONDITION(aFrame->IsTransformed() ||
7074 : aFrame->BackfaceIsHidden() ||
7075 : aFrame->Combines3DTransformWithAncestors(),
7076 : "Shouldn't get a delta for an untransformed frame!");
7077 :
7078 194 : if (!aFrame->IsTransformed()) {
7079 0 : return Point3D();
7080 : }
7081 :
7082 : /* For both of the coordinates, if the value of transform is a
7083 : * percentage, it's relative to the size of the frame. Otherwise, if it's
7084 : * a distance, it's already computed for us!
7085 : */
7086 194 : const nsStyleDisplay* display = aFrame->StyleDisplay();
7087 : // We don't use aBoundsOverride for SVG since we need to account for
7088 : // refBox.X/Y(). This happens to work because ReflowSVG sets the frame's
7089 : // mRect before calling FinishAndStoreOverflow so we don't need the override.
7090 194 : TransformReferenceBox refBox;
7091 194 : if (aBoundsOverride &&
7092 0 : !(aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT)) {
7093 0 : refBox.Init(aBoundsOverride->Size());
7094 : } else {
7095 194 : refBox.Init(aFrame);
7096 : }
7097 :
7098 : /* Allows us to access dimension getters by index. */
7099 : float transformOrigin[2];
7100 : TransformReferenceBox::DimensionGetter dimensionGetter[] =
7101 194 : { &TransformReferenceBox::Width, &TransformReferenceBox::Height };
7102 : TransformReferenceBox::DimensionGetter offsetGetter[] =
7103 194 : { &TransformReferenceBox::X, &TransformReferenceBox::Y };
7104 :
7105 582 : for (uint8_t index = 0; index < 2; ++index) {
7106 : /* If the transform-origin specifies a percentage, take the percentage
7107 : * of the size of the box.
7108 : */
7109 388 : const nsStyleCoord& originValue = display->mTransformOrigin[index];
7110 388 : if (originValue.GetUnit() == eStyleUnit_Calc) {
7111 0 : const nsStyleCoord::Calc *calc = originValue.GetCalcValue();
7112 0 : transformOrigin[index] =
7113 0 : NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) *
7114 0 : calc->mPercent +
7115 0 : NSAppUnitsToFloatPixels(calc->mLength, aAppUnitsPerPixel);
7116 388 : } else if (originValue.GetUnit() == eStyleUnit_Percent) {
7117 608 : transformOrigin[index] =
7118 608 : NSAppUnitsToFloatPixels((refBox.*dimensionGetter[index])(), aAppUnitsPerPixel) *
7119 304 : originValue.GetPercentValue();
7120 : } else {
7121 84 : MOZ_ASSERT(originValue.GetUnit() == eStyleUnit_Coord,
7122 : "unexpected unit");
7123 168 : transformOrigin[index] =
7124 84 : NSAppUnitsToFloatPixels(originValue.GetCoordValue(),
7125 : aAppUnitsPerPixel);
7126 : }
7127 :
7128 388 : if (aFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT) {
7129 : // SVG frames (unlike other frames) have a reference box that can be (and
7130 : // typically is) offset from the TopLeft() of the frame. We need to
7131 : // account for that here.
7132 288 : transformOrigin[index] +=
7133 288 : NSAppUnitsToFloatPixels((refBox.*offsetGetter[index])(), aAppUnitsPerPixel);
7134 : }
7135 : }
7136 :
7137 388 : return Point3D(transformOrigin[0], transformOrigin[1],
7138 : NSAppUnitsToFloatPixels(display->mTransformOrigin[2].GetCoordValue(),
7139 194 : aAppUnitsPerPixel));
7140 : }
7141 :
7142 : /* static */ bool
7143 194 : nsDisplayTransform::ComputePerspectiveMatrix(const nsIFrame* aFrame,
7144 : float aAppUnitsPerPixel,
7145 : Matrix4x4& aOutMatrix)
7146 : {
7147 194 : NS_PRECONDITION(aFrame, "Can't get delta for a null frame!");
7148 194 : NS_PRECONDITION(aFrame->IsTransformed() ||
7149 : aFrame->BackfaceIsHidden() ||
7150 : aFrame->Combines3DTransformWithAncestors(),
7151 : "Shouldn't get a delta for an untransformed frame!");
7152 194 : NS_PRECONDITION(aOutMatrix.IsIdentity(), "Must have a blank output matrix");
7153 :
7154 194 : if (!aFrame->IsTransformed()) {
7155 0 : return false;
7156 : }
7157 :
7158 : /* Find our containing block, which is the element that provides the
7159 : * value for perspective we need to use
7160 : */
7161 :
7162 : //TODO: Is it possible that the cbFrame's bounds haven't been set correctly yet
7163 : // (similar to the aBoundsOverride case for GetResultingTransformMatrix)?
7164 194 : nsIFrame* cbFrame = aFrame->GetContainingBlock(nsIFrame::SKIP_SCROLLED_FRAME);
7165 194 : if (!cbFrame) {
7166 0 : return false;
7167 : }
7168 :
7169 : /* Grab the values for perspective and perspective-origin (if present) */
7170 :
7171 194 : const nsStyleDisplay* cbDisplay = cbFrame->StyleDisplay();
7172 194 : if (cbDisplay->mChildPerspective.GetUnit() != eStyleUnit_Coord) {
7173 194 : return false;
7174 : }
7175 0 : nscoord perspective = cbDisplay->mChildPerspective.GetCoordValue();
7176 0 : if (perspective < std::numeric_limits<Float>::epsilon()) {
7177 0 : return true;
7178 : }
7179 :
7180 0 : TransformReferenceBox refBox(cbFrame);
7181 :
7182 : Point perspectiveOrigin =
7183 : nsStyleTransformMatrix::Convert2DPosition(cbDisplay->mPerspectiveOrigin,
7184 0 : refBox, aAppUnitsPerPixel);
7185 :
7186 : /* GetOffsetTo computes the offset required to move from 0,0 in cbFrame to 0,0
7187 : * in aFrame. Although we actually want the inverse of this, it's faster to
7188 : * compute this way.
7189 : */
7190 0 : nsPoint frameToCbOffset = -aFrame->GetOffsetTo(cbFrame);
7191 : Point frameToCbGfxOffset(
7192 : NSAppUnitsToFloatPixels(frameToCbOffset.x, aAppUnitsPerPixel),
7193 0 : NSAppUnitsToFloatPixels(frameToCbOffset.y, aAppUnitsPerPixel));
7194 :
7195 : /* Move the perspective origin to be relative to aFrame, instead of relative
7196 : * to the containing block which is how it was specified in the style system.
7197 : */
7198 0 : perspectiveOrigin += frameToCbGfxOffset;
7199 :
7200 0 : aOutMatrix._34 =
7201 0 : -1.0 / NSAppUnitsToFloatPixels(perspective, aAppUnitsPerPixel);
7202 :
7203 0 : aOutMatrix.ChangeBasis(Point3D(perspectiveOrigin.x, perspectiveOrigin.y, 0));
7204 0 : return true;
7205 : }
7206 :
7207 194 : nsDisplayTransform::FrameTransformProperties::FrameTransformProperties(const nsIFrame* aFrame,
7208 : float aAppUnitsPerPixel,
7209 194 : const nsRect* aBoundsOverride)
7210 : : mFrame(aFrame)
7211 194 : , mTransformList(aFrame->StyleDisplay()->mSpecifiedTransform)
7212 388 : , mToTransformOrigin(GetDeltaToTransformOrigin(aFrame, aAppUnitsPerPixel, aBoundsOverride))
7213 : {
7214 194 : }
7215 :
7216 : /* Wraps up the transform matrix in a change-of-basis matrix pair that
7217 : * translates from local coordinate space to transform coordinate space, then
7218 : * hands it back.
7219 : */
7220 : Matrix4x4
7221 0 : nsDisplayTransform::GetResultingTransformMatrix(const FrameTransformProperties& aProperties,
7222 : const nsPoint& aOrigin,
7223 : float aAppUnitsPerPixel,
7224 : uint32_t aFlags,
7225 : const nsRect* aBoundsOverride)
7226 : {
7227 : return GetResultingTransformMatrixInternal(aProperties, aOrigin, aAppUnitsPerPixel,
7228 0 : aFlags, aBoundsOverride);
7229 : }
7230 :
7231 : Matrix4x4
7232 194 : nsDisplayTransform::GetResultingTransformMatrix(const nsIFrame* aFrame,
7233 : const nsPoint& aOrigin,
7234 : float aAppUnitsPerPixel,
7235 : uint32_t aFlags,
7236 : const nsRect* aBoundsOverride)
7237 : {
7238 : FrameTransformProperties props(aFrame,
7239 : aAppUnitsPerPixel,
7240 388 : aBoundsOverride);
7241 :
7242 : return GetResultingTransformMatrixInternal(props, aOrigin, aAppUnitsPerPixel,
7243 388 : aFlags, aBoundsOverride);
7244 : }
7245 :
7246 : Matrix4x4
7247 194 : nsDisplayTransform::GetResultingTransformMatrixInternal(const FrameTransformProperties& aProperties,
7248 : const nsPoint& aOrigin,
7249 : float aAppUnitsPerPixel,
7250 : uint32_t aFlags,
7251 : const nsRect* aBoundsOverride)
7252 : {
7253 194 : const nsIFrame *frame = aProperties.mFrame;
7254 194 : NS_ASSERTION(frame || !(aFlags & INCLUDE_PERSPECTIVE), "Must have a frame to compute perspective!");
7255 :
7256 : // Get the underlying transform matrix:
7257 :
7258 : // We don't use aBoundsOverride for SVG since we need to account for
7259 : // refBox.X/Y(). This happens to work because ReflowSVG sets the frame's
7260 : // mRect before calling FinishAndStoreOverflow so we don't need the override.
7261 194 : TransformReferenceBox refBox;
7262 194 : if (aBoundsOverride &&
7263 0 : (!frame || !(frame->GetStateBits() & NS_FRAME_SVG_LAYOUT))) {
7264 0 : refBox.Init(aBoundsOverride->Size());
7265 : } else {
7266 194 : refBox.Init(frame);
7267 : }
7268 :
7269 : /* Get the matrix, then change its basis to factor in the origin. */
7270 194 : RuleNodeCacheConditions dummy;
7271 : bool dummyBool;
7272 194 : Matrix4x4 result;
7273 : // Call IsSVGTransformed() regardless of the value of
7274 : // disp->mSpecifiedTransform, since we still need any
7275 : // parentsChildrenOnlyTransform.
7276 194 : Matrix svgTransform, parentsChildrenOnlyTransform;
7277 : bool hasSVGTransforms =
7278 388 : frame && frame->IsSVGTransformed(&svgTransform,
7279 388 : &parentsChildrenOnlyTransform);
7280 : /* Transformed frames always have a transform, or are preserving 3d (and might still have perspective!) */
7281 194 : if (aProperties.mTransformList) {
7282 50 : result = nsStyleTransformMatrix::ReadTransforms(aProperties.mTransformList->mHead,
7283 : frame ? frame->StyleContext() : nullptr,
7284 : frame ? frame->PresContext() : nullptr,
7285 : dummy, refBox, aAppUnitsPerPixel,
7286 : &dummyBool);
7287 144 : } else if (hasSVGTransforms) {
7288 : // Correct the translation components for zoom:
7289 144 : float pixelsPerCSSPx = frame->PresContext()->AppUnitsPerCSSPixel() /
7290 144 : aAppUnitsPerPixel;
7291 144 : svgTransform._31 *= pixelsPerCSSPx;
7292 144 : svgTransform._32 *= pixelsPerCSSPx;
7293 144 : result = Matrix4x4::From2D(svgTransform);
7294 : }
7295 :
7296 : // Apply any translation due to 'transform-origin' and/or 'transform-box':
7297 194 : result.ChangeBasis(aProperties.mToTransformOrigin);
7298 :
7299 : // See the comment for nsSVGContainerFrame::HasChildrenOnlyTransform for
7300 : // an explanation of what children-only transforms are.
7301 : bool parentHasChildrenOnlyTransform =
7302 194 : hasSVGTransforms && !parentsChildrenOnlyTransform.IsIdentity();
7303 :
7304 194 : if (parentHasChildrenOnlyTransform) {
7305 : float pixelsPerCSSPx =
7306 0 : frame->PresContext()->AppUnitsPerCSSPixel() / aAppUnitsPerPixel;
7307 0 : parentsChildrenOnlyTransform._31 *= pixelsPerCSSPx;
7308 0 : parentsChildrenOnlyTransform._32 *= pixelsPerCSSPx;
7309 :
7310 : Point3D frameOffset(
7311 0 : NSAppUnitsToFloatPixels(-frame->GetPosition().x, aAppUnitsPerPixel),
7312 0 : NSAppUnitsToFloatPixels(-frame->GetPosition().y, aAppUnitsPerPixel),
7313 0 : 0);
7314 : Matrix4x4 parentsChildrenOnlyTransform3D =
7315 0 : Matrix4x4::From2D(parentsChildrenOnlyTransform).ChangeBasis(frameOffset);
7316 :
7317 0 : result *= parentsChildrenOnlyTransform3D;
7318 : }
7319 :
7320 194 : Matrix4x4 perspectiveMatrix;
7321 194 : bool hasPerspective = aFlags & INCLUDE_PERSPECTIVE;
7322 194 : if (hasPerspective) {
7323 194 : if (ComputePerspectiveMatrix(frame, aAppUnitsPerPixel, perspectiveMatrix)) {
7324 0 : result *= perspectiveMatrix;
7325 : }
7326 : }
7327 :
7328 546 : if ((aFlags & INCLUDE_PRESERVE3D_ANCESTORS) &&
7329 352 : frame && frame->Combines3DTransformWithAncestors()) {
7330 : // Include the transform set on our parent
7331 0 : NS_ASSERTION(frame->GetParent() &&
7332 : frame->GetParent()->IsTransformed() &&
7333 : frame->GetParent()->Extend3DContext(),
7334 : "Preserve3D mismatch!");
7335 0 : FrameTransformProperties props(frame->GetParent(),
7336 : aAppUnitsPerPixel,
7337 0 : nullptr);
7338 :
7339 0 : uint32_t flags = aFlags & (INCLUDE_PRESERVE3D_ANCESTORS|INCLUDE_PERSPECTIVE);
7340 :
7341 : // If this frame isn't transformed (but we exist for backface-visibility),
7342 : // then we're not a reference frame so no offset to origin will be added.
7343 : // Otherwise we need to manually translate into our parent's coordinate
7344 : // space.
7345 0 : if (frame->IsTransformed()) {
7346 0 : nsLayoutUtils::PostTranslate(result, frame->GetPosition(), aAppUnitsPerPixel, !hasSVGTransforms);
7347 : }
7348 : Matrix4x4 parent =
7349 : GetResultingTransformMatrixInternal(props,
7350 0 : nsPoint(0, 0),
7351 : aAppUnitsPerPixel, flags,
7352 0 : nullptr);
7353 0 : result = result * parent;
7354 : }
7355 :
7356 194 : if (aFlags & OFFSET_BY_ORIGIN) {
7357 194 : nsLayoutUtils::PostTranslate(result, aOrigin, aAppUnitsPerPixel, !hasSVGTransforms);
7358 : }
7359 :
7360 194 : return result;
7361 : }
7362 :
7363 : bool
7364 0 : nsDisplayOpacity::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder)
7365 : {
7366 0 : if (ActiveLayerTracker::IsStyleAnimated(aBuilder, mFrame, eCSSProperty_opacity)) {
7367 0 : return true;
7368 : }
7369 :
7370 : EffectCompositor::SetPerformanceWarning(
7371 0 : mFrame, eCSSProperty_opacity,
7372 0 : AnimationPerformanceWarning(
7373 0 : AnimationPerformanceWarning::Type::OpacityFrameInactive));
7374 :
7375 0 : return false;
7376 : }
7377 :
7378 : bool
7379 0 : nsDisplayTransform::CanUseAsyncAnimations(nsDisplayListBuilder* aBuilder)
7380 : {
7381 0 : return mAllowAsyncAnimation;
7382 :
7383 : }
7384 :
7385 : static void
7386 0 : RecordAnimationFrameSizeTelemetry(nsIFrame* aFrame, const nsSize& overflow)
7387 : {
7388 0 : gfxSize scale = nsLayoutUtils::GetTransformToAncestorScale(aFrame);
7389 0 : nsSize frameSize = nsSize(overflow.width * scale.width,
7390 0 : overflow.height * scale.height);
7391 0 : uint32_t pixelArea = uint32_t(nsPresContext::AppUnitsToIntCSSPixels(frameSize.width))
7392 0 : * nsPresContext::AppUnitsToIntCSSPixels(frameSize.height);
7393 0 : if (EffectSet* effects = EffectSet::GetEffectSet(aFrame)) {
7394 0 : for (KeyframeEffectReadOnly* effect : *effects) {
7395 0 : effect->RecordFrameSizeTelemetry(pixelArea);
7396 : }
7397 : }
7398 0 : }
7399 :
7400 : /* static */ auto
7401 24 : nsDisplayTransform::ShouldPrerenderTransformedContent(nsDisplayListBuilder* aBuilder,
7402 : nsIFrame* aFrame,
7403 : nsRect* aDirtyRect) -> PrerenderDecision
7404 : {
7405 : // Elements whose transform has been modified recently, or which
7406 : // have a compositor-animated transform, can be prerendered. An element
7407 : // might have only just had its transform animated in which case
7408 : // the ActiveLayerManager may not have been notified yet.
7409 48 : if (!ActiveLayerTracker::IsStyleMaybeAnimated(aFrame, eCSSProperty_transform) &&
7410 24 : !EffectCompositor::HasAnimationsForCompositor(aFrame,
7411 : eCSSProperty_transform)) {
7412 : EffectCompositor::SetPerformanceWarning(
7413 : aFrame, eCSSProperty_transform,
7414 48 : AnimationPerformanceWarning(
7415 24 : AnimationPerformanceWarning::Type::TransformFrameInactive));
7416 :
7417 24 : return NoPrerender;
7418 : }
7419 :
7420 0 : nsRect overflow = aFrame->GetVisualOverflowRectRelativeToSelf();
7421 :
7422 : // Record telemetry about the size of the animated content.
7423 : // Check CanRecordExtended() so we don't do any processing if the
7424 : // telemetry won't be recorded anyways.
7425 0 : if (Telemetry::CanRecordExtended()) {
7426 0 : RecordAnimationFrameSizeTelemetry(aFrame, overflow.Size());
7427 : }
7428 :
7429 : // If the incoming dirty rect already contains the entire overflow area,
7430 : // we are already rendering the entire content.
7431 0 : if (aDirtyRect->Contains(overflow)) {
7432 0 : return FullPrerender;
7433 : }
7434 :
7435 0 : float viewportRatioX = gfxPrefs::AnimationPrerenderViewportRatioLimitX();
7436 0 : float viewportRatioY = gfxPrefs::AnimationPrerenderViewportRatioLimitY();
7437 0 : uint32_t absoluteLimitX = gfxPrefs::AnimationPrerenderAbsoluteLimitX();
7438 0 : uint32_t absoluteLimitY = gfxPrefs::AnimationPrerenderAbsoluteLimitY();
7439 0 : nsSize refSize = aBuilder->RootReferenceFrame()->GetSize();
7440 : // Only prerender if the transformed frame's size is <= a multiple of the
7441 : // reference frame size (~viewport), and less than an absolute limit.
7442 : // Both the ratio and the absolute limit are configurable.
7443 0 : nsSize relativeLimit(nscoord(refSize.width * viewportRatioX),
7444 0 : nscoord(refSize.height * viewportRatioY));
7445 : nsSize absoluteLimit(aFrame->PresContext()->DevPixelsToAppUnits(absoluteLimitX),
7446 0 : aFrame->PresContext()->DevPixelsToAppUnits(absoluteLimitY));
7447 0 : nsSize maxSize = Min(relativeLimit, absoluteLimit);
7448 0 : gfxSize scale = nsLayoutUtils::GetTransformToAncestorScale(aFrame);
7449 0 : nsSize frameSize(overflow.Size().width * scale.width,
7450 0 : overflow.Size().height * scale.height);
7451 0 : uint64_t maxLimitArea = uint64_t(maxSize.width) * maxSize.height;
7452 0 : uint64_t frameArea = uint64_t(frameSize.width) * frameSize.height;
7453 0 : if (frameArea <= maxLimitArea && frameSize <= absoluteLimit) {
7454 0 : *aDirtyRect = overflow;
7455 0 : return FullPrerender;
7456 0 : } else if (gfxPrefs::PartiallyPrerenderAnimatedContent()) {
7457 0 : *aDirtyRect = nsLayoutUtils::ComputePartialPrerenderArea(*aDirtyRect, overflow, maxSize);
7458 0 : return PartialPrerender;
7459 : }
7460 :
7461 0 : if (frameArea > maxLimitArea) {
7462 0 : uint64_t appUnitsPerPixel = nsPresContext::AppUnitsPerCSSPixel();
7463 : EffectCompositor::SetPerformanceWarning(
7464 : aFrame, eCSSProperty_transform,
7465 0 : AnimationPerformanceWarning(
7466 : AnimationPerformanceWarning::Type::ContentTooLargeArea,
7467 : {
7468 0 : int(frameArea / (appUnitsPerPixel * appUnitsPerPixel)),
7469 0 : int(maxLimitArea / (appUnitsPerPixel * appUnitsPerPixel)),
7470 0 : }));
7471 : } else {
7472 : EffectCompositor::SetPerformanceWarning(
7473 : aFrame, eCSSProperty_transform,
7474 0 : AnimationPerformanceWarning(
7475 : AnimationPerformanceWarning::Type::ContentTooLarge,
7476 : {
7477 0 : nsPresContext::AppUnitsToIntCSSPixels(frameSize.width),
7478 0 : nsPresContext::AppUnitsToIntCSSPixels(frameSize.height),
7479 0 : nsPresContext::AppUnitsToIntCSSPixels(relativeLimit.width),
7480 0 : nsPresContext::AppUnitsToIntCSSPixels(relativeLimit.height),
7481 0 : nsPresContext::AppUnitsToIntCSSPixels(absoluteLimit.width),
7482 0 : nsPresContext::AppUnitsToIntCSSPixels(absoluteLimit.height),
7483 0 : }));
7484 : }
7485 :
7486 0 : return NoPrerender;
7487 : }
7488 :
7489 : /* If the matrix is singular, or a hidden backface is shown, the frame won't be visible or hit. */
7490 0 : static bool IsFrameVisible(nsIFrame* aFrame, const Matrix4x4& aMatrix)
7491 : {
7492 0 : if (aMatrix.IsSingular()) {
7493 0 : return false;
7494 : }
7495 0 : if (aFrame->BackfaceIsHidden() && aMatrix.IsBackfaceVisible()) {
7496 0 : return false;
7497 : }
7498 0 : return true;
7499 : }
7500 :
7501 : const Matrix4x4&
7502 106 : nsDisplayTransform::GetTransform()
7503 : {
7504 106 : if (mTransform.IsIdentity()) {
7505 36 : float scale = mFrame->PresContext()->AppUnitsPerDevPixel();
7506 : Point3D newOrigin =
7507 : Point3D(NSAppUnitsToFloatPixels(mToReferenceFrame.x, scale),
7508 : NSAppUnitsToFloatPixels(mToReferenceFrame.y, scale),
7509 36 : 0.0f);
7510 36 : if (mTransformGetter) {
7511 0 : mTransform = mTransformGetter(mFrame, scale);
7512 0 : mTransform.ChangeBasis(newOrigin.x, newOrigin.y, newOrigin.z);
7513 36 : } else if (!mIsTransformSeparator) {
7514 : DebugOnly<bool> isReference =
7515 36 : mFrame->IsTransformed() ||
7516 72 : mFrame->Combines3DTransformWithAncestors() || mFrame->Extend3DContext();
7517 36 : MOZ_ASSERT(isReference);
7518 36 : mTransform =
7519 72 : GetResultingTransformMatrix(mFrame, ToReferenceFrame(),
7520 : scale, INCLUDE_PERSPECTIVE|OFFSET_BY_ORIGIN);
7521 : }
7522 : }
7523 106 : return mTransform;
7524 : }
7525 :
7526 : Matrix4x4
7527 24 : nsDisplayTransform::GetTransformForRendering()
7528 : {
7529 24 : if (!mFrame->HasPerspective() || mTransformGetter || mIsTransformSeparator) {
7530 24 : return GetTransform();
7531 : }
7532 0 : MOZ_ASSERT(!mTransformGetter);
7533 :
7534 0 : float scale = mFrame->PresContext()->AppUnitsPerDevPixel();
7535 : // Don't include perspective transform, or the offset to origin, since
7536 : // nsDisplayPerspective will handle both of those.
7537 0 : return GetResultingTransformMatrix(mFrame, ToReferenceFrame(), scale, 0);
7538 : }
7539 :
7540 : const Matrix4x4&
7541 0 : nsDisplayTransform::GetAccumulatedPreserved3DTransform(nsDisplayListBuilder* aBuilder)
7542 : {
7543 0 : MOZ_ASSERT(!mFrame->Extend3DContext() || IsLeafOf3DContext());
7544 : // XXX: should go back to fix mTransformGetter.
7545 0 : if (!mTransformPreserves3DInited) {
7546 0 : mTransformPreserves3DInited = true;
7547 0 : if (!IsLeafOf3DContext()) {
7548 0 : mTransformPreserves3D = GetTransform();
7549 0 : return mTransformPreserves3D;
7550 : }
7551 :
7552 : const nsIFrame* establisher; // Establisher of the 3D rendering context.
7553 0 : for (establisher = mFrame;
7554 0 : establisher && establisher->Combines3DTransformWithAncestors();
7555 : establisher = nsLayoutUtils::GetCrossDocParentFrame(establisher)) {
7556 : }
7557 : const nsIFrame* establisherReference =
7558 0 : aBuilder->FindReferenceFrameFor(nsLayoutUtils::GetCrossDocParentFrame(establisher));
7559 :
7560 0 : nsPoint offset = establisher->GetOffsetToCrossDoc(establisherReference);
7561 0 : float scale = mFrame->PresContext()->AppUnitsPerDevPixel();
7562 0 : uint32_t flags = INCLUDE_PRESERVE3D_ANCESTORS|INCLUDE_PERSPECTIVE|OFFSET_BY_ORIGIN;
7563 0 : mTransformPreserves3D =
7564 0 : GetResultingTransformMatrix(mFrame, offset, scale, flags);
7565 : }
7566 0 : return mTransformPreserves3D;
7567 : }
7568 :
7569 : bool
7570 0 : nsDisplayTransform::ShouldBuildLayerEvenIfInvisible(nsDisplayListBuilder* aBuilder)
7571 : {
7572 : // The visible rect of a Preserves-3D frame is just an intermediate
7573 : // result. It should always build a layer to make sure it is
7574 : // rendering correctly.
7575 0 : return MayBeAnimated(aBuilder) || mFrame->Combines3DTransformWithAncestors();
7576 : }
7577 :
7578 : bool
7579 0 : nsDisplayTransform::CreateWebRenderCommands(mozilla::wr::DisplayListBuilder& aBuilder,
7580 : const StackingContextHelper& aSc,
7581 : nsTArray<WebRenderParentCommand>& aParentCommands,
7582 : WebRenderLayerManager* aManager,
7583 : nsDisplayListBuilder* aDisplayListBuilder)
7584 : {
7585 0 : Matrix4x4 newTransformMatrix = GetTransformForRendering();
7586 0 : gfx::Matrix4x4* transformForSC = &newTransformMatrix;
7587 0 : if (newTransformMatrix.IsIdentity()) {
7588 : // If the transform is an identity transform, strip it out so that WR
7589 : // doesn't turn this stacking context into a reference frame, as it
7590 : // affects positioning. Bug 1345577 tracks a better fix.
7591 0 : transformForSC = nullptr;
7592 : }
7593 :
7594 0 : nsRect itemBounds = mStoredList.GetChildren()->GetClippedBoundsWithRespectToASR(aDisplayListBuilder, mActiveScrolledRoot);
7595 0 : nsRect childrenVisible = GetVisibleRectForChildren();
7596 0 : nsRect visibleRect = itemBounds.Intersect(childrenVisible);
7597 0 : float appUnitsPerDevPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
7598 0 : LayerRect bounds = ViewAs<LayerPixel>(LayoutDeviceRect::FromAppUnits(visibleRect, appUnitsPerDevPixel),
7599 0 : PixelCastJustification::WebRenderHasUnitResolution);
7600 0 : LayerPoint origin = bounds.TopLeft();
7601 :
7602 0 : gfx::Matrix4x4Typed<LayerPixel, LayerPixel> boundTransform = ViewAs< gfx::Matrix4x4Typed<LayerPixel, LayerPixel> >(newTransformMatrix);
7603 0 : boundTransform._41 = 0.0f;
7604 0 : boundTransform._42 = 0.0f;
7605 0 : boundTransform._43 = 0.0f;
7606 0 : if (!boundTransform.IsIdentity()) {
7607 : // WR will only apply the 'translate' of the transform, so we need to do the scale/rotation manually.
7608 0 : bounds.MoveTo(boundTransform.TransformPoint(bounds.TopLeft()));
7609 : }
7610 :
7611 : // TODO: generate animationsId for OMTA.
7612 0 : uint64_t animationsId = 0;
7613 0 : nsTArray<WrFilterOp> filters;
7614 : StackingContextHelper sc(aSc,
7615 : aBuilder,
7616 : bounds,
7617 : origin,
7618 : animationsId,
7619 : nullptr,
7620 : transformForSC,
7621 0 : filters);
7622 :
7623 0 : aManager->CreateWebRenderCommandsFromDisplayList(mStoredList.GetChildren(),
7624 : aDisplayListBuilder,
7625 : sc,
7626 0 : aBuilder);
7627 :
7628 0 : return true;
7629 : }
7630 :
7631 24 : already_AddRefed<Layer> nsDisplayTransform::BuildLayer(nsDisplayListBuilder *aBuilder,
7632 : LayerManager *aManager,
7633 : const ContainerLayerParameters& aContainerParameters)
7634 : {
7635 : /* For frames without transform, it would not be removed for
7636 : * backface hidden here. But, it would be removed by the init
7637 : * function of nsDisplayTransform.
7638 : */
7639 24 : const Matrix4x4& newTransformMatrix = GetTransformForRendering();
7640 :
7641 24 : uint32_t flags = FrameLayerBuilder::CONTAINER_ALLOW_PULL_BACKGROUND_COLOR;
7642 : RefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
7643 48 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mStoredList.GetChildren(),
7644 48 : aContainerParameters, &newTransformMatrix, flags);
7645 :
7646 24 : if (!container) {
7647 0 : return nullptr;
7648 : }
7649 :
7650 : // Add the preserve-3d flag for this layer, BuildContainerLayerFor clears all flags,
7651 : // so we never need to explicitely unset this flag.
7652 24 : if (mFrame->Extend3DContext() && !mNoExtendContext) {
7653 0 : container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_EXTEND_3D_CONTEXT);
7654 : } else {
7655 24 : container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_EXTEND_3D_CONTEXT);
7656 : }
7657 :
7658 24 : nsDisplayListBuilder::AddAnimationsAndTransitionsToLayer(container, aBuilder,
7659 : this, mFrame,
7660 24 : eCSSProperty_transform);
7661 24 : if (mAllowAsyncAnimation && MayBeAnimated(aBuilder)) {
7662 : // Only allow async updates to the transform if we're an animated layer, since that's what
7663 : // triggers us to set the correct AGR in the constructor and makes sure FrameLayerBuilder
7664 : // won't compute occlusions for this layer.
7665 0 : container->SetUserData(nsIFrame::LayerIsPrerenderedDataKey(),
7666 0 : /*the value is irrelevant*/nullptr);
7667 0 : container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_MAY_CHANGE_TRANSFORM);
7668 : } else {
7669 24 : container->RemoveUserData(nsIFrame::LayerIsPrerenderedDataKey());
7670 24 : container->SetContentFlags(container->GetContentFlags() & ~Layer::CONTENT_MAY_CHANGE_TRANSFORM);
7671 : }
7672 24 : return container.forget();
7673 : }
7674 :
7675 : bool
7676 76 : nsDisplayTransform::MayBeAnimated(nsDisplayListBuilder* aBuilder)
7677 : {
7678 : // If EffectCompositor::HasAnimationsForCompositor() is true then we can
7679 : // completely bypass the main thread for this animation, so it is always
7680 : // worthwhile.
7681 : // For ActiveLayerTracker::IsStyleAnimated() cases the main thread is
7682 : // already involved so there is less to be gained.
7683 : // Therefore we check that the *post-transform* bounds of this item are
7684 : // big enough to justify an active layer.
7685 152 : if (EffectCompositor::HasAnimationsForCompositor(mFrame,
7686 152 : eCSSProperty_transform) ||
7687 76 : (ActiveLayerTracker::IsStyleAnimated(aBuilder,
7688 : mFrame,
7689 0 : eCSSProperty_transform) &&
7690 0 : !IsItemTooSmallForActiveLayer(mFrame))) {
7691 0 : return true;
7692 : }
7693 76 : return false;
7694 : }
7695 :
7696 : nsDisplayItem::LayerState
7697 52 : nsDisplayTransform::GetLayerState(nsDisplayListBuilder* aBuilder,
7698 : LayerManager* aManager,
7699 : const ContainerLayerParameters& aParameters) {
7700 : // If the transform is 3d, the layer takes part in preserve-3d
7701 : // sorting, or the layer is a separator then we *always* want this
7702 : // to be an active layer.
7703 : // Checking HasPerspective() is needed to handle perspective value 0 when
7704 : // the transform is 2D.
7705 208 : if (!GetTransform().Is2D() || mFrame->Combines3DTransformWithAncestors() ||
7706 156 : mIsTransformSeparator || mFrame->HasPerspective()) {
7707 0 : return LAYER_ACTIVE_FORCE;
7708 : }
7709 :
7710 52 : if (MayBeAnimated(aBuilder)) {
7711 : // Returns LAYER_ACTIVE_FORCE to avoid flatterning the layer for async
7712 : // animations.
7713 0 : return LAYER_ACTIVE_FORCE;
7714 : }
7715 :
7716 : // Expect the child display items to have this frame as their animated
7717 : // geometry root (since it will be their reference frame). If they have a
7718 : // different animated geometry root, we'll make this an active layer so the
7719 : // animation can be accelerated.
7720 52 : return RequiredLayerStateForChildren(aBuilder, aManager, aParameters,
7721 52 : *mStoredList.GetChildren(), mAnimatedGeometryRootForChildren);
7722 : }
7723 :
7724 2 : bool nsDisplayTransform::ComputeVisibility(nsDisplayListBuilder *aBuilder,
7725 : nsRegion *aVisibleRegion)
7726 : {
7727 : /* As we do this, we need to be sure to
7728 : * untransform the visible rect, since we want everything that's painting to
7729 : * think that it's painting in its original rectangular coordinate space.
7730 : * If we can't untransform, take the entire overflow rect */
7731 4 : nsRect untransformedVisibleRect;
7732 2 : if (!UntransformVisibleRect(aBuilder, &untransformedVisibleRect))
7733 : {
7734 0 : untransformedVisibleRect = mFrame->GetVisualOverflowRectRelativeToSelf();
7735 : }
7736 4 : nsRegion untransformedVisible = untransformedVisibleRect;
7737 : // Call RecomputeVisiblity instead of ComputeVisibility since
7738 : // nsDisplayItem::ComputeVisibility should only be called from
7739 : // nsDisplayList::ComputeVisibility (which sets mVisibleRect on the item)
7740 2 : mStoredList.RecomputeVisibility(aBuilder, &untransformedVisible);
7741 4 : return true;
7742 : }
7743 :
7744 : #ifdef DEBUG_HIT
7745 : #include <time.h>
7746 : #endif
7747 :
7748 : /* HitTest does some fun stuff with matrix transforms to obtain the answer. */
7749 0 : void nsDisplayTransform::HitTest(nsDisplayListBuilder *aBuilder,
7750 : const nsRect& aRect,
7751 : HitTestState *aState,
7752 : nsTArray<nsIFrame*> *aOutFrames)
7753 : {
7754 0 : if (aState->mInPreserves3D) {
7755 0 : mStoredList.HitTest(aBuilder, aRect, aState, aOutFrames);
7756 0 : return;
7757 : }
7758 :
7759 : /* Here's how this works:
7760 : * 1. Get the matrix. If it's singular, abort (clearly we didn't hit
7761 : * anything).
7762 : * 2. Invert the matrix.
7763 : * 3. Use it to transform the rect into the correct space.
7764 : * 4. Pass that rect down through to the list's version of HitTest.
7765 : */
7766 : // GetTransform always operates in dev pixels.
7767 0 : float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
7768 0 : Matrix4x4 matrix = GetAccumulatedPreserved3DTransform(aBuilder);
7769 :
7770 0 : if (!IsFrameVisible(mFrame, matrix)) {
7771 0 : return;
7772 : }
7773 :
7774 : /* We want to go from transformed-space to regular space.
7775 : * Thus we have to invert the matrix, which normally does
7776 : * the reverse operation (e.g. regular->transformed)
7777 : */
7778 :
7779 : /* Now, apply the transform and pass it down the channel. */
7780 0 : matrix.Invert();
7781 0 : nsRect resultingRect;
7782 0 : if (aRect.width == 1 && aRect.height == 1) {
7783 : // Magic width/height indicating we're hit testing a point, not a rect
7784 0 : Point4D point = matrix.ProjectPoint(Point(NSAppUnitsToFloatPixels(aRect.x, factor),
7785 0 : NSAppUnitsToFloatPixels(aRect.y, factor)));
7786 0 : if (!point.HasPositiveWCoord()) {
7787 0 : return;
7788 : }
7789 :
7790 0 : Point point2d = point.As2DPoint();
7791 :
7792 0 : resultingRect = nsRect(NSFloatPixelsToAppUnits(float(point2d.x), factor),
7793 0 : NSFloatPixelsToAppUnits(float(point2d.y), factor),
7794 0 : 1, 1);
7795 :
7796 : } else {
7797 0 : Rect originalRect(NSAppUnitsToFloatPixels(aRect.x, factor),
7798 0 : NSAppUnitsToFloatPixels(aRect.y, factor),
7799 0 : NSAppUnitsToFloatPixels(aRect.width, factor),
7800 0 : NSAppUnitsToFloatPixels(aRect.height, factor));
7801 :
7802 :
7803 : bool snap;
7804 0 : nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap);
7805 : Rect childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor),
7806 : NSAppUnitsToFloatPixels(childBounds.y, factor),
7807 : NSAppUnitsToFloatPixels(childBounds.width, factor),
7808 0 : NSAppUnitsToFloatPixels(childBounds.height, factor));
7809 :
7810 0 : Rect rect = matrix.ProjectRectBounds(originalRect, childGfxBounds);
7811 :
7812 0 : resultingRect = nsRect(NSFloatPixelsToAppUnits(float(rect.X()), factor),
7813 : NSFloatPixelsToAppUnits(float(rect.Y()), factor),
7814 : NSFloatPixelsToAppUnits(float(rect.Width()), factor),
7815 : NSFloatPixelsToAppUnits(float(rect.Height()), factor));
7816 : }
7817 :
7818 0 : if (resultingRect.IsEmpty()) {
7819 0 : return;
7820 : }
7821 :
7822 :
7823 : #ifdef DEBUG_HIT
7824 : printf("Frame: %p\n", dynamic_cast<void *>(mFrame));
7825 : printf(" Untransformed point: (%f, %f)\n", resultingRect.X(), resultingRect.Y());
7826 : uint32_t originalFrameCount = aOutFrames.Length();
7827 : #endif
7828 :
7829 0 : mStoredList.HitTest(aBuilder, resultingRect, aState, aOutFrames);
7830 :
7831 : #ifdef DEBUG_HIT
7832 : if (originalFrameCount != aOutFrames.Length())
7833 : printf(" Hit! Time: %f, first frame: %p\n", static_cast<double>(clock()),
7834 : dynamic_cast<void *>(aOutFrames.ElementAt(0)));
7835 : printf("=== end of hit test ===\n");
7836 : #endif
7837 :
7838 : }
7839 :
7840 : float
7841 0 : nsDisplayTransform::GetHitDepthAtPoint(nsDisplayListBuilder* aBuilder, const nsPoint& aPoint)
7842 : {
7843 : // GetTransform always operates in dev pixels.
7844 0 : float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
7845 0 : Matrix4x4 matrix = GetAccumulatedPreserved3DTransform(aBuilder);
7846 :
7847 0 : NS_ASSERTION(IsFrameVisible(mFrame, matrix),
7848 : "We can't have hit a frame that isn't visible!");
7849 :
7850 0 : Matrix4x4 inverse = matrix;
7851 0 : inverse.Invert();
7852 0 : Point4D point = inverse.ProjectPoint(Point(NSAppUnitsToFloatPixels(aPoint.x, factor),
7853 0 : NSAppUnitsToFloatPixels(aPoint.y, factor)));
7854 :
7855 0 : Point point2d = point.As2DPoint();
7856 :
7857 0 : Point3D transformed = matrix.TransformPoint(Point3D(point2d.x, point2d.y, 0));
7858 0 : return transformed.z;
7859 : }
7860 :
7861 : /* The bounding rectangle for the object is the overflow rectangle translated
7862 : * by the reference point.
7863 : */
7864 : nsRect
7865 60 : nsDisplayTransform::GetBounds(nsDisplayListBuilder* aBuilder, bool* aSnap)
7866 : {
7867 60 : *aSnap = false;
7868 :
7869 60 : if (mHasBounds) {
7870 36 : return mBounds;
7871 : }
7872 :
7873 24 : if (mFrame->Extend3DContext() && !mIsTransformSeparator) {
7874 0 : return nsRect();
7875 : }
7876 :
7877 48 : nsRect untransformedBounds = mStoredList.GetBounds(aBuilder, aSnap);
7878 : // GetTransform always operates in dev pixels.
7879 24 : float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
7880 24 : mBounds = nsLayoutUtils::MatrixTransformRect(untransformedBounds,
7881 24 : GetTransform(),
7882 : factor);
7883 24 : mHasBounds = true;
7884 24 : return mBounds;
7885 : }
7886 :
7887 : void
7888 0 : nsDisplayTransform::ComputeBounds(nsDisplayListBuilder* aBuilder)
7889 : {
7890 0 : MOZ_ASSERT(mFrame->Extend3DContext() || IsLeafOf3DContext());
7891 :
7892 : /* For some cases, the transform would make an empty bounds, but it
7893 : * may be turned back again to get a non-empty bounds. We should
7894 : * not depend on transforming bounds level by level.
7895 : *
7896 : * Here, it applies accumulated transforms on the leaf frames of the
7897 : * 3d rendering context, and track and accmulate bounds at
7898 : * nsDisplayListBuilder.
7899 : */
7900 0 : nsDisplayListBuilder::AutoAccumulateTransform accTransform(aBuilder);
7901 :
7902 0 : accTransform.Accumulate(GetTransform());
7903 :
7904 0 : if (!IsLeafOf3DContext()) {
7905 : // Do not dive into another 3D context.
7906 0 : mStoredList.DoUpdateBoundsPreserves3D(aBuilder);
7907 : }
7908 :
7909 : /* For Preserves3D, it is bounds of only children as leaf frames.
7910 : * For non-leaf frames, their bounds are accumulated and kept at
7911 : * nsDisplayListBuilder.
7912 : */
7913 : bool snap;
7914 0 : nsRect untransformedBounds = mStoredList.GetBounds(aBuilder, &snap);
7915 : // GetTransform always operates in dev pixels.
7916 0 : float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
7917 : nsRect rect =
7918 : nsLayoutUtils::MatrixTransformRect(untransformedBounds,
7919 0 : accTransform.GetCurrentTransform(),
7920 0 : factor);
7921 :
7922 0 : aBuilder->AccumulateRect(rect);
7923 0 : }
7924 :
7925 : /* The transform is opaque iff the transform consists solely of scales and
7926 : * translations and if the underlying content is opaque. Thus if the transform
7927 : * is of the form
7928 : *
7929 : * |a c e|
7930 : * |b d f|
7931 : * |0 0 1|
7932 : *
7933 : * We need b and c to be zero.
7934 : *
7935 : * We also need to check whether the underlying opaque content completely fills
7936 : * our visible rect. We use UntransformRect which expands to the axis-aligned
7937 : * bounding rect, but that's OK since if
7938 : * mStoredList.GetVisibleRect().Contains(untransformedVisible), then it
7939 : * certainly contains the actual (non-axis-aligned) untransformed rect.
7940 : */
7941 2 : nsRegion nsDisplayTransform::GetOpaqueRegion(nsDisplayListBuilder *aBuilder,
7942 : bool* aSnap)
7943 : {
7944 2 : *aSnap = false;
7945 4 : nsRect untransformedVisible;
7946 2 : if (!UntransformVisibleRect(aBuilder, &untransformedVisible)) {
7947 0 : return nsRegion();
7948 : }
7949 :
7950 2 : const Matrix4x4& matrix = GetTransform();
7951 :
7952 4 : nsRegion result;
7953 2 : Matrix matrix2d;
7954 : bool tmpSnap;
7955 8 : if (matrix.Is2D(&matrix2d) &&
7956 8 : matrix2d.PreservesAxisAlignedRectangles() &&
7957 8 : mStoredList.GetOpaqueRegion(aBuilder, &tmpSnap).Contains(untransformedVisible)) {
7958 2 : result = mVisibleRect.Intersect(GetBounds(aBuilder, &tmpSnap));
7959 : }
7960 2 : return result;
7961 : }
7962 :
7963 : /* The transform is uniform if it fills the entire bounding rect and the
7964 : * wrapped list is uniform. See GetOpaqueRegion for discussion of why this
7965 : * works.
7966 : */
7967 : Maybe<nscolor>
7968 0 : nsDisplayTransform::IsUniform(nsDisplayListBuilder *aBuilder)
7969 : {
7970 0 : nsRect untransformedVisible;
7971 0 : if (!UntransformVisibleRect(aBuilder, &untransformedVisible)) {
7972 0 : return Nothing();
7973 : }
7974 0 : const Matrix4x4& matrix = GetTransform();
7975 :
7976 0 : Matrix matrix2d;
7977 0 : if (matrix.Is2D(&matrix2d) &&
7978 0 : matrix2d.PreservesAxisAlignedRectangles() &&
7979 0 : mStoredList.GetVisibleRect().Contains(untransformedVisible)) {
7980 0 : return mStoredList.IsUniform(aBuilder);
7981 : }
7982 :
7983 0 : return Nothing();
7984 : }
7985 :
7986 : /* If UNIFIED_CONTINUATIONS is defined, we can merge two display lists that
7987 : * share the same underlying content. Otherwise, doing so results in graphical
7988 : * glitches.
7989 : */
7990 : #ifndef UNIFIED_CONTINUATIONS
7991 :
7992 : bool
7993 22 : nsDisplayTransform::TryMerge(nsDisplayItem *aItem)
7994 : {
7995 22 : return false;
7996 : }
7997 :
7998 : #else
7999 :
8000 : bool
8001 : nsDisplayTransform::TryMerge(nsDisplayItem *aItem)
8002 : {
8003 : NS_PRECONDITION(aItem, "Why did you try merging with a null item?");
8004 :
8005 : /* Make sure that we're dealing with two transforms. */
8006 : if (aItem->GetType() != TYPE_TRANSFORM)
8007 : return false;
8008 :
8009 : /* Check to see that both frames are part of the same content. */
8010 : if (aItem->Frame()->GetContent() != mFrame->GetContent())
8011 : return false;
8012 :
8013 : if (aItem->GetClipChain() != GetClipChain())
8014 : return false;
8015 :
8016 : /* Now, move everything over to this frame and signal that
8017 : * we merged things!
8018 : */
8019 : mStoredList.MergeFromTrackingMergedFrames(&static_cast<nsDisplayTransform*>(aItem)->mStoredList);
8020 : return true;
8021 : }
8022 :
8023 : #endif
8024 :
8025 : /* TransformRect takes in as parameters a rectangle (in app space) and returns
8026 : * the smallest rectangle (in app space) containing the transformed image of
8027 : * that rectangle. That is, it takes the four corners of the rectangle,
8028 : * transforms them according to the matrix associated with the specified frame,
8029 : * then returns the smallest rectangle containing the four transformed points.
8030 : *
8031 : * @param aUntransformedBounds The rectangle (in app units) to transform.
8032 : * @param aFrame The frame whose transformation should be applied.
8033 : * @param aOrigin The delta from the frame origin to the coordinate space origin
8034 : * @param aBoundsOverride (optional) Force the frame bounds to be the
8035 : * specified bounds.
8036 : * @return The smallest rectangle containing the image of the transformed
8037 : * rectangle.
8038 : */
8039 134 : nsRect nsDisplayTransform::TransformRect(const nsRect &aUntransformedBounds,
8040 : const nsIFrame* aFrame,
8041 : const nsRect* aBoundsOverride)
8042 : {
8043 134 : NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
8044 :
8045 134 : float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
8046 :
8047 134 : uint32_t flags = INCLUDE_PERSPECTIVE|OFFSET_BY_ORIGIN|INCLUDE_PRESERVE3D_ANCESTORS;
8048 : return nsLayoutUtils::MatrixTransformRect
8049 : (aUntransformedBounds,
8050 268 : GetResultingTransformMatrix(aFrame, nsPoint(0, 0), factor, flags, aBoundsOverride),
8051 268 : factor);
8052 : }
8053 :
8054 24 : bool nsDisplayTransform::UntransformRect(const nsRect &aTransformedBounds,
8055 : const nsRect &aChildBounds,
8056 : const nsIFrame* aFrame,
8057 : nsRect *aOutRect)
8058 : {
8059 24 : NS_PRECONDITION(aFrame, "Can't take the transform based on a null frame!");
8060 :
8061 24 : float factor = aFrame->PresContext()->AppUnitsPerDevPixel();
8062 :
8063 24 : uint32_t flags = INCLUDE_PERSPECTIVE|OFFSET_BY_ORIGIN|INCLUDE_PRESERVE3D_ANCESTORS;
8064 :
8065 24 : Matrix4x4 transform = GetResultingTransformMatrix(aFrame, nsPoint(0, 0), factor, flags);
8066 24 : if (transform.IsSingular()) {
8067 0 : return false;
8068 : }
8069 :
8070 24 : RectDouble result(NSAppUnitsToFloatPixels(aTransformedBounds.x, factor),
8071 24 : NSAppUnitsToFloatPixels(aTransformedBounds.y, factor),
8072 24 : NSAppUnitsToFloatPixels(aTransformedBounds.width, factor),
8073 96 : NSAppUnitsToFloatPixels(aTransformedBounds.height, factor));
8074 :
8075 24 : RectDouble childGfxBounds(NSAppUnitsToFloatPixels(aChildBounds.x, factor),
8076 24 : NSAppUnitsToFloatPixels(aChildBounds.y, factor),
8077 24 : NSAppUnitsToFloatPixels(aChildBounds.width, factor),
8078 96 : NSAppUnitsToFloatPixels(aChildBounds.height, factor));
8079 :
8080 24 : result = transform.Inverse().ProjectRectBounds(result, childGfxBounds);
8081 24 : *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(ThebesRect(result), factor);
8082 24 : return true;
8083 : }
8084 :
8085 4 : bool nsDisplayTransform::UntransformVisibleRect(nsDisplayListBuilder* aBuilder,
8086 : nsRect *aOutRect)
8087 : {
8088 4 : const Matrix4x4& matrix = GetTransform();
8089 4 : if (matrix.IsSingular())
8090 0 : return false;
8091 :
8092 : // GetTransform always operates in dev pixels.
8093 4 : float factor = mFrame->PresContext()->AppUnitsPerDevPixel();
8094 4 : RectDouble result(NSAppUnitsToFloatPixels(mVisibleRect.x, factor),
8095 4 : NSAppUnitsToFloatPixels(mVisibleRect.y, factor),
8096 4 : NSAppUnitsToFloatPixels(mVisibleRect.width, factor),
8097 16 : NSAppUnitsToFloatPixels(mVisibleRect.height, factor));
8098 :
8099 : bool snap;
8100 8 : nsRect childBounds = mStoredList.GetBounds(aBuilder, &snap);
8101 4 : RectDouble childGfxBounds(NSAppUnitsToFloatPixels(childBounds.x, factor),
8102 4 : NSAppUnitsToFloatPixels(childBounds.y, factor),
8103 4 : NSAppUnitsToFloatPixels(childBounds.width, factor),
8104 16 : NSAppUnitsToFloatPixels(childBounds.height, factor));
8105 :
8106 : /* We want to untransform the matrix, so invert the transformation first! */
8107 4 : result = matrix.Inverse().ProjectRectBounds(result, childGfxBounds);
8108 :
8109 4 : *aOutRect = nsLayoutUtils::RoundGfxRectToAppRect(ThebesRect(result), factor);
8110 :
8111 4 : return true;
8112 : }
8113 :
8114 : void
8115 0 : nsDisplayTransform::WriteDebugInfo(std::stringstream& aStream)
8116 : {
8117 0 : AppendToString(aStream, GetTransform());
8118 0 : if (IsTransformSeparator()) {
8119 0 : aStream << " transform-separator";
8120 : }
8121 0 : if (IsLeafOf3DContext()) {
8122 0 : aStream << " 3d-context-leaf";
8123 : }
8124 0 : if (mFrame->Extend3DContext()) {
8125 0 : aStream << " extends-3d-context";
8126 : }
8127 0 : if (mFrame->Combines3DTransformWithAncestors()) {
8128 0 : aStream << " combines-3d-with-ancestors";
8129 : }
8130 0 : }
8131 :
8132 0 : nsDisplayPerspective::nsDisplayPerspective(nsDisplayListBuilder* aBuilder,
8133 : nsIFrame* aTransformFrame,
8134 : nsIFrame* aPerspectiveFrame,
8135 0 : nsDisplayList* aList)
8136 : : nsDisplayItem(aBuilder, aPerspectiveFrame)
8137 : , mList(aBuilder, aPerspectiveFrame, aList)
8138 : , mTransformFrame(aTransformFrame)
8139 0 : , mIndex(aBuilder->AllocatePerspectiveItemIndex())
8140 : {
8141 0 : MOZ_ASSERT(mList.GetChildren()->Count() == 1);
8142 0 : MOZ_ASSERT(mList.GetChildren()->GetTop()->GetType() == TYPE_TRANSFORM);
8143 0 : }
8144 :
8145 : already_AddRefed<Layer>
8146 0 : nsDisplayPerspective::BuildLayer(nsDisplayListBuilder *aBuilder,
8147 : LayerManager *aManager,
8148 : const ContainerLayerParameters& aContainerParameters)
8149 : {
8150 0 : float appUnitsPerPixel = mFrame->PresContext()->AppUnitsPerDevPixel();
8151 :
8152 0 : Matrix4x4 perspectiveMatrix;
8153 : DebugOnly<bool> hasPerspective =
8154 0 : nsDisplayTransform::ComputePerspectiveMatrix(mTransformFrame, appUnitsPerPixel,
8155 0 : perspectiveMatrix);
8156 0 : MOZ_ASSERT(hasPerspective, "Why did we create nsDisplayPerspective?");
8157 :
8158 : /*
8159 : * ClipListToRange can remove our child after we were created.
8160 : */
8161 0 : if (!mList.GetChildren()->GetTop()) {
8162 0 : return nullptr;
8163 : }
8164 :
8165 : /*
8166 : * The resulting matrix is still in the coordinate space of the transformed
8167 : * frame. Append a translation to the reference frame coordinates.
8168 : */
8169 : nsDisplayTransform* transform =
8170 0 : static_cast<nsDisplayTransform*>(mList.GetChildren()->GetTop());
8171 :
8172 : Point3D newOrigin =
8173 0 : Point3D(NSAppUnitsToFloatPixels(transform->ToReferenceFrame().x, appUnitsPerPixel),
8174 0 : NSAppUnitsToFloatPixels(transform->ToReferenceFrame().y, appUnitsPerPixel),
8175 0 : 0.0f);
8176 0 : Point3D roundedOrigin(NS_round(newOrigin.x),
8177 0 : NS_round(newOrigin.y),
8178 0 : 0);
8179 :
8180 0 : perspectiveMatrix.PostTranslate(roundedOrigin);
8181 :
8182 : RefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
8183 0 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, mList.GetChildren(),
8184 0 : aContainerParameters, &perspectiveMatrix, 0);
8185 :
8186 0 : if (!container) {
8187 0 : return nullptr;
8188 : }
8189 :
8190 : // Sort of a lie, but we want to pretend that the perspective layer extends a 3d context
8191 : // so that it gets its transform combined with children. Might need a better name that reflects
8192 : // this use case and isn't specific to preserve-3d.
8193 0 : container->SetContentFlags(container->GetContentFlags() | Layer::CONTENT_EXTEND_3D_CONTEXT);
8194 0 : container->SetTransformIsPerspective(true);
8195 :
8196 0 : return container.forget();
8197 : }
8198 :
8199 : LayerState
8200 0 : nsDisplayPerspective::GetLayerState(nsDisplayListBuilder* aBuilder,
8201 : LayerManager* aManager,
8202 : const ContainerLayerParameters& aParameters)
8203 : {
8204 0 : return LAYER_ACTIVE_FORCE;
8205 : }
8206 :
8207 : int32_t
8208 0 : nsDisplayPerspective::ZIndex() const
8209 : {
8210 0 : return ZIndexForFrame(mTransformFrame);
8211 : }
8212 :
8213 : nsDisplayItemGeometry*
8214 0 : nsCharClipDisplayItem::AllocateGeometry(nsDisplayListBuilder* aBuilder)
8215 : {
8216 0 : return new nsCharClipGeometry(this, aBuilder);
8217 : }
8218 :
8219 : void
8220 0 : nsCharClipDisplayItem::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
8221 : const nsDisplayItemGeometry* aGeometry,
8222 : nsRegion* aInvalidRegion)
8223 : {
8224 0 : const nsCharClipGeometry* geometry = static_cast<const nsCharClipGeometry*>(aGeometry);
8225 :
8226 : bool snap;
8227 0 : nsRect newRect = geometry->mBounds;
8228 0 : nsRect oldRect = GetBounds(aBuilder, &snap);
8229 0 : if (mVisIStartEdge != geometry->mVisIStartEdge ||
8230 0 : mVisIEndEdge != geometry->mVisIEndEdge ||
8231 0 : !oldRect.IsEqualInterior(newRect) ||
8232 0 : !geometry->mBorderRect.IsEqualInterior(GetBorderRect())) {
8233 0 : aInvalidRegion->Or(oldRect, newRect);
8234 : }
8235 0 : }
8236 :
8237 7 : nsDisplaySVGEffects::nsDisplaySVGEffects(nsDisplayListBuilder* aBuilder,
8238 : nsIFrame* aFrame, nsDisplayList* aList,
8239 : bool aHandleOpacity,
8240 7 : const ActiveScrolledRoot* aActiveScrolledRoot)
8241 : : nsDisplayWrapList(aBuilder, aFrame, aList, aActiveScrolledRoot)
8242 : , mEffectsBounds(aFrame->GetVisualOverflowRectRelativeToSelf())
8243 7 : , mHandleOpacity(aHandleOpacity)
8244 : {
8245 7 : MOZ_COUNT_CTOR(nsDisplaySVGEffects);
8246 7 : }
8247 :
8248 0 : nsDisplaySVGEffects::nsDisplaySVGEffects(nsDisplayListBuilder* aBuilder,
8249 : nsIFrame* aFrame, nsDisplayList* aList,
8250 0 : bool aHandleOpacity)
8251 : : nsDisplayWrapList(aBuilder, aFrame, aList)
8252 : , mEffectsBounds(aFrame->GetVisualOverflowRectRelativeToSelf())
8253 0 : , mHandleOpacity(aHandleOpacity)
8254 : {
8255 0 : MOZ_COUNT_CTOR(nsDisplaySVGEffects);
8256 0 : }
8257 :
8258 : #ifdef NS_BUILD_REFCNT_LOGGING
8259 14 : nsDisplaySVGEffects::~nsDisplaySVGEffects()
8260 : {
8261 7 : MOZ_COUNT_DTOR(nsDisplaySVGEffects);
8262 7 : }
8263 : #endif
8264 :
8265 12 : nsRegion nsDisplaySVGEffects::GetOpaqueRegion(nsDisplayListBuilder* aBuilder,
8266 : bool* aSnap)
8267 : {
8268 12 : *aSnap = false;
8269 12 : return nsRegion();
8270 : }
8271 :
8272 : void
8273 0 : nsDisplaySVGEffects::HitTest(nsDisplayListBuilder* aBuilder, const nsRect& aRect,
8274 : HitTestState* aState, nsTArray<nsIFrame*> *aOutFrames)
8275 : {
8276 0 : nsPoint rectCenter(aRect.x + aRect.width / 2, aRect.y + aRect.height / 2);
8277 0 : if (nsSVGIntegrationUtils::HitTestFrameForEffects(mFrame,
8278 0 : rectCenter - ToReferenceFrame())) {
8279 0 : mList.HitTest(aBuilder, aRect, aState, aOutFrames);
8280 : }
8281 0 : }
8282 :
8283 : gfxRect
8284 5 : nsDisplaySVGEffects::BBoxInUserSpace() const
8285 : {
8286 5 : return nsSVGUtils::GetBBox(mFrame);
8287 : }
8288 :
8289 : gfxPoint
8290 5 : nsDisplaySVGEffects::UserSpaceOffset() const
8291 : {
8292 5 : return nsSVGUtils::FrameSpaceInCSSPxToUserSpaceOffset(mFrame);
8293 : }
8294 :
8295 : void
8296 4 : nsDisplaySVGEffects::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
8297 : const nsDisplayItemGeometry* aGeometry,
8298 : nsRegion* aInvalidRegion)
8299 : {
8300 : const nsDisplaySVGEffectGeometry* geometry =
8301 4 : static_cast<const nsDisplaySVGEffectGeometry*>(aGeometry);
8302 : bool snap;
8303 8 : nsRect bounds = GetBounds(aBuilder, &snap);
8304 19 : if (geometry->mFrameOffsetToReferenceFrame != ToReferenceFrame() ||
8305 24 : geometry->mUserSpaceOffset != UserSpaceOffset() ||
8306 10 : !geometry->mBBox.IsEqualInterior(BBoxInUserSpace())) {
8307 : // Filter and mask output can depend on the location of the frame's user
8308 : // space and on the frame's BBox. We need to invalidate if either of these
8309 : // change relative to the reference frame.
8310 : // Invalidations from our inactive layer manager are not enough to catch
8311 : // some of these cases because filters can produce output even if there's
8312 : // nothing in the filter input.
8313 1 : aInvalidRegion->Or(bounds, geometry->mBounds);
8314 : }
8315 4 : }
8316 :
8317 7 : bool nsDisplaySVGEffects::ValidateSVGFrame()
8318 : {
8319 7 : const nsIContent* content = mFrame->GetContent();
8320 7 : bool hasSVGLayout = (mFrame->GetStateBits() & NS_FRAME_SVG_LAYOUT);
8321 7 : if (hasSVGLayout) {
8322 2 : nsSVGDisplayableFrame* svgFrame = do_QueryFrame(mFrame);
8323 2 : if (!svgFrame || !mFrame->GetContent()->IsSVGElement()) {
8324 0 : NS_ASSERTION(false, "why?");
8325 0 : return false;
8326 : }
8327 2 : if (!static_cast<const nsSVGElement*>(content)->HasValidDimensions()) {
8328 0 : return false; // The SVG spec says not to draw filters for this
8329 : }
8330 : }
8331 :
8332 7 : return true;
8333 : }
8334 :
8335 : static IntRect
8336 3 : ComputeClipExtsInDeviceSpace(gfxContext& aCtx)
8337 : {
8338 6 : gfxContextMatrixAutoSaveRestore matRestore(&aCtx);
8339 :
8340 : // Get the clip extents in device space.
8341 3 : aCtx.SetMatrix(gfxMatrix());
8342 3 : gfxRect clippedFrameSurfaceRect = aCtx.GetClipExtents();
8343 3 : clippedFrameSurfaceRect.RoundOut();
8344 :
8345 3 : IntRect result;
8346 3 : ToRect(clippedFrameSurfaceRect).ToIntRect(&result);
8347 6 : return mozilla::gfx::Factory::CheckSurfaceSize(result.Size()) ? result
8348 6 : : IntRect();
8349 : }
8350 :
8351 : typedef nsSVGIntegrationUtils::PaintFramesParams PaintFramesParams;
8352 :
8353 : static nsPoint
8354 3 : ComputeOffsetToUserSpace(const PaintFramesParams& aParams)
8355 : {
8356 3 : nsIFrame* frame = aParams.frame;
8357 6 : nsPoint offsetToBoundingBox = aParams.builder->ToReferenceFrame(frame) -
8358 9 : nsSVGIntegrationUtils::GetOffsetToBoundingBox(frame);
8359 3 : if (!frame->IsFrameOfType(nsIFrame::eSVG)) {
8360 : // Snap the offset if the reference frame is not a SVG frame, since other
8361 : // frames will be snapped to pixel when rendering.
8362 3 : offsetToBoundingBox = nsPoint(
8363 : frame->PresContext()->RoundAppUnitsToNearestDevPixels(offsetToBoundingBox.x),
8364 : frame->PresContext()->RoundAppUnitsToNearestDevPixels(offsetToBoundingBox.y));
8365 : }
8366 :
8367 : // After applying only "offsetToBoundingBox", aParams.ctx would have its
8368 : // origin at the top left corner of frame's bounding box (over all
8369 : // continuations).
8370 : // However, SVG painting needs the origin to be located at the origin of the
8371 : // SVG frame's "user space", i.e. the space in which, for example, the
8372 : // frame's BBox lives.
8373 : // SVG geometry frames and foreignObject frames apply their own offsets, so
8374 : // their position is relative to their user space. So for these frame types,
8375 : // if we want aCtx to be in user space, we first need to subtract the
8376 : // frame's position so that SVG painting can later add it again and the
8377 : // frame is painted in the right place.
8378 3 : gfxPoint toUserSpaceGfx = nsSVGUtils::FrameSpaceInCSSPxToUserSpaceOffset(frame);
8379 : nsPoint toUserSpace =
8380 3 : nsPoint(nsPresContext::CSSPixelsToAppUnits(float(toUserSpaceGfx.x)),
8381 6 : nsPresContext::CSSPixelsToAppUnits(float(toUserSpaceGfx.y)));
8382 :
8383 3 : return (offsetToBoundingBox - toUserSpace);
8384 : }
8385 :
8386 : static void
8387 5 : ComputeMaskGeometry(PaintFramesParams& aParams)
8388 : {
8389 : // Properties are added lazily and may have been removed by a restyle, so
8390 : // make sure all applicable ones are set again.
8391 : nsIFrame* firstFrame =
8392 5 : nsLayoutUtils::FirstContinuationOrIBSplitSibling(aParams.frame);
8393 :
8394 5 : const nsStyleSVGReset *svgReset = firstFrame->StyleSVGReset();
8395 :
8396 : nsSVGEffects::EffectProperties effectProperties =
8397 5 : nsSVGEffects::GetEffectProperties(firstFrame);
8398 8 : nsTArray<nsSVGMaskFrame *> maskFrames = effectProperties.GetMaskFrames();
8399 :
8400 5 : if (maskFrames.Length() == 0) {
8401 2 : return;
8402 : }
8403 :
8404 3 : gfxContext& ctx = aParams.ctx;
8405 3 : nsIFrame* frame = aParams.frame;
8406 :
8407 3 : nsPoint offsetToUserSpace = ComputeOffsetToUserSpace(aParams);
8408 : gfxPoint devPixelOffsetToUserSpace =
8409 : nsLayoutUtils::PointToGfxPoint(offsetToUserSpace,
8410 3 : frame->PresContext()->AppUnitsPerDevPixel());
8411 :
8412 6 : gfxContextMatrixAutoSaveRestore matSR(&ctx);
8413 3 : ctx.SetMatrix(ctx.CurrentMatrix().PreTranslate(devPixelOffsetToUserSpace));
8414 :
8415 : // Convert boaderArea and dirtyRect to user space.
8416 3 : int32_t appUnitsPerDevPixel = frame->PresContext()->AppUnitsPerDevPixel();
8417 6 : nsRect userSpaceBorderArea = aParams.borderArea - offsetToUserSpace;
8418 6 : nsRect userSpaceDirtyRect = aParams.dirtyRect - offsetToUserSpace;
8419 :
8420 : // Union all mask layer rectangles in user space.
8421 3 : gfxRect maskInUserSpace;
8422 6 : for (size_t i = 0; i < maskFrames.Length() ; i++) {
8423 3 : nsSVGMaskFrame* maskFrame = maskFrames[i];
8424 3 : gfxRect currentMaskSurfaceRect;
8425 :
8426 3 : if (maskFrame) {
8427 0 : currentMaskSurfaceRect = maskFrame->GetMaskArea(aParams.frame);
8428 : } else {
8429 6 : nsCSSRendering::ImageLayerClipState clipState;
8430 3 : nsCSSRendering::GetImageLayerClip(svgReset->mMask.mLayers[i],
8431 : frame,
8432 3 : *frame->StyleBorder(),
8433 : userSpaceBorderArea,
8434 : userSpaceDirtyRect,
8435 : false, /* aWillPaintBorder */
8436 : appUnitsPerDevPixel,
8437 3 : &clipState);
8438 3 : currentMaskSurfaceRect = clipState.mDirtyRectInDevPx;
8439 : }
8440 :
8441 3 : maskInUserSpace = maskInUserSpace.Union(currentMaskSurfaceRect);
8442 : }
8443 :
8444 3 : ctx.Save();
8445 :
8446 3 : if (!maskInUserSpace.IsEmpty()) {
8447 3 : ctx.Clip(maskInUserSpace);
8448 : }
8449 :
8450 3 : IntRect result = ComputeClipExtsInDeviceSpace(ctx);
8451 3 : ctx.Restore();
8452 :
8453 3 : aParams.maskRect = result;
8454 : }
8455 :
8456 7 : nsDisplayMask::nsDisplayMask(nsDisplayListBuilder* aBuilder,
8457 : nsIFrame* aFrame, nsDisplayList* aList,
8458 : bool aHandleOpacity,
8459 7 : const ActiveScrolledRoot* aActiveScrolledRoot)
8460 7 : : nsDisplaySVGEffects(aBuilder, aFrame, aList, aHandleOpacity, aActiveScrolledRoot)
8461 : {
8462 7 : MOZ_COUNT_CTOR(nsDisplayMask);
8463 :
8464 7 : nsPresContext* presContext = mFrame->PresContext();
8465 7 : uint32_t flags = aBuilder->GetBackgroundPaintFlags() |
8466 7 : nsCSSRendering::PAINTBG_MASK_IMAGE;
8467 7 : const nsStyleSVGReset *svgReset = aFrame->StyleSVGReset();
8468 14 : NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, svgReset->mMask) {
8469 : bool isTransformedFixed;
8470 : nsBackgroundLayerState state =
8471 : nsCSSRendering::PrepareImageLayer(presContext, aFrame, flags,
8472 14 : mFrame->GetRectRelativeToSelf(),
8473 14 : mFrame->GetRectRelativeToSelf(),
8474 : svgReset->mMask.mLayers[i],
8475 28 : &isTransformedFixed);
8476 7 : mDestRects.AppendElement(state.mDestArea);
8477 : }
8478 7 : }
8479 :
8480 : #ifdef NS_BUILD_REFCNT_LOGGING
8481 14 : nsDisplayMask::~nsDisplayMask()
8482 : {
8483 7 : MOZ_COUNT_DTOR(nsDisplayMask);
8484 7 : }
8485 : #endif
8486 :
8487 7 : bool nsDisplayMask::TryMerge(nsDisplayItem* aItem)
8488 : {
8489 7 : if (aItem->GetType() != TYPE_MASK)
8490 7 : return false;
8491 :
8492 : // items for the same content element should be merged into a single
8493 : // compositing group
8494 : // aItem->GetUnderlyingFrame() returns non-null because it's nsDisplaySVGEffects
8495 0 : if (aItem->Frame()->GetContent() != mFrame->GetContent()) {
8496 0 : return false;
8497 : }
8498 0 : if (aItem->GetClipChain() != GetClipChain()) {
8499 0 : return false;
8500 : }
8501 :
8502 : // Do not merge if mFrame has mask. Continuation frames should apply mask
8503 : // independently(just like nsDisplayBackgroundImage).
8504 0 : if (mFrame->StyleSVGReset()->HasMask()) {
8505 0 : return false;
8506 : }
8507 :
8508 0 : nsDisplayMask* other = static_cast<nsDisplayMask*>(aItem);
8509 0 : MergeFromTrackingMergedFrames(other);
8510 0 : mEffectsBounds.UnionRect(mEffectsBounds,
8511 0 : other->mEffectsBounds + other->mFrame->GetOffsetTo(mFrame));
8512 :
8513 0 : return true;
8514 : }
8515 :
8516 : already_AddRefed<Layer>
8517 7 : nsDisplayMask::BuildLayer(nsDisplayListBuilder* aBuilder,
8518 : LayerManager* aManager,
8519 : const ContainerLayerParameters& aContainerParameters)
8520 : {
8521 7 : if (!ValidateSVGFrame()) {
8522 0 : return nullptr;
8523 : }
8524 :
8525 7 : if (mFrame->StyleEffects()->mOpacity == 0.0f && mHandleOpacity) {
8526 0 : return nullptr;
8527 : }
8528 :
8529 : nsIFrame* firstFrame =
8530 7 : nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
8531 : nsSVGEffects::EffectProperties effectProperties =
8532 7 : nsSVGEffects::GetEffectProperties(firstFrame);
8533 :
8534 14 : if (effectProperties.HasInvalidClipPath() ||
8535 7 : effectProperties.HasInvalidMask()) {
8536 0 : return nullptr;
8537 : }
8538 :
8539 : RefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
8540 14 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
8541 14 : aContainerParameters, nullptr);
8542 :
8543 7 : return container.forget();
8544 : }
8545 :
8546 : bool
8547 0 : nsDisplayMask::PaintMask(nsDisplayListBuilder* aBuilder,
8548 : gfxContext* aMaskContext)
8549 : {
8550 0 : MOZ_ASSERT(aMaskContext->GetDrawTarget()->GetFormat() == SurfaceFormat::A8);
8551 :
8552 0 : imgDrawingParams imgParmas(aBuilder->ShouldSyncDecodeImages()
8553 : ? imgIContainer::FLAG_SYNC_DECODE
8554 0 : : imgIContainer::FLAG_SYNC_DECODE_IF_FAST);
8555 0 : nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
8556 : nsSVGIntegrationUtils::PaintFramesParams params(*aMaskContext,
8557 : mFrame, mVisibleRect,
8558 : borderArea, aBuilder,
8559 : nullptr,
8560 0 : mHandleOpacity, imgParmas);
8561 0 : ComputeMaskGeometry(params);
8562 0 : nsSVGIntegrationUtils::PaintMask(params);
8563 :
8564 0 : nsDisplayMaskGeometry::UpdateDrawResult(this, imgParmas.result);
8565 :
8566 0 : return imgParmas.result == mozilla::image::DrawResult::SUCCESS;
8567 : }
8568 :
8569 : LayerState
8570 14 : nsDisplayMask::GetLayerState(nsDisplayListBuilder* aBuilder,
8571 : LayerManager* aManager,
8572 : const ContainerLayerParameters& aParameters)
8573 : {
8574 14 : if (ShouldPaintOnMaskLayer(aManager)) {
8575 0 : return RequiredLayerStateForChildren(aBuilder, aManager, aParameters,
8576 0 : mList, GetAnimatedGeometryRoot());
8577 : }
8578 :
8579 14 : return LAYER_SVG_EFFECTS;
8580 : }
8581 :
8582 19 : bool nsDisplayMask::ShouldPaintOnMaskLayer(LayerManager* aManager)
8583 : {
8584 19 : if (!aManager->IsCompositingCheap()) {
8585 19 : return false;
8586 : }
8587 :
8588 0 : nsSVGUtils::MaskUsage maskUsage;
8589 0 : nsSVGUtils::DetermineMaskUsage(mFrame, mHandleOpacity, maskUsage);
8590 :
8591 : // XXX Temporary disable paint clip-path onto mask before figure out
8592 : // performance regression(bug 1325550).
8593 0 : if (maskUsage.shouldApplyClipPath) {
8594 0 : return false;
8595 : }
8596 :
8597 0 : if (!nsSVGIntegrationUtils::IsMaskResourceReady(mFrame)) {
8598 0 : return false;
8599 : }
8600 :
8601 0 : if (gfxPrefs::DrawMaskLayer()) {
8602 0 : return false;
8603 : }
8604 :
8605 0 : return true;
8606 : }
8607 :
8608 5 : bool nsDisplayMask::ComputeVisibility(nsDisplayListBuilder* aBuilder,
8609 : nsRegion* aVisibleRegion)
8610 : {
8611 : // Our children may be made translucent or arbitrarily deformed so we should
8612 : // not allow them to subtract area from aVisibleRegion.
8613 10 : nsRegion childrenVisible(mVisibleRect);
8614 : nsRect r = mVisibleRect.Intersect(
8615 10 : mList.GetClippedBoundsWithRespectToASR(aBuilder, mActiveScrolledRoot));
8616 5 : mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r);
8617 10 : return true;
8618 : }
8619 :
8620 : void
8621 4 : nsDisplayMask::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
8622 : const nsDisplayItemGeometry* aGeometry,
8623 : nsRegion* aInvalidRegion)
8624 : {
8625 4 : nsDisplaySVGEffects::ComputeInvalidationRegion(aBuilder, aGeometry,
8626 4 : aInvalidRegion);
8627 :
8628 : const nsDisplayMaskGeometry* geometry =
8629 4 : static_cast<const nsDisplayMaskGeometry*>(aGeometry);
8630 : bool snap;
8631 8 : nsRect bounds = GetBounds(aBuilder, &snap);
8632 :
8633 4 : if (mDestRects.Length() != geometry->mDestRects.Length()) {
8634 0 : aInvalidRegion->Or(bounds, geometry->mBounds);
8635 : } else {
8636 7 : for (size_t i = 0; i < mDestRects.Length(); i++) {
8637 4 : if (!mDestRects[i].IsEqualInterior(geometry->mDestRects[i])) {
8638 1 : aInvalidRegion->Or(bounds, geometry->mBounds);
8639 1 : break;
8640 : }
8641 : }
8642 : }
8643 :
8644 4 : if (aBuilder->ShouldSyncDecodeImages() &&
8645 0 : geometry->ShouldInvalidateToSyncDecodeImages()) {
8646 0 : const nsStyleSVGReset *svgReset = mFrame->StyleSVGReset();
8647 0 : NS_FOR_VISIBLE_IMAGE_LAYERS_BACK_TO_FRONT(i, svgReset->mMask) {
8648 0 : const nsStyleImage& image = svgReset->mMask.mLayers[i].mImage;
8649 0 : if (image.GetType() == eStyleImageType_Image ) {
8650 0 : aInvalidRegion->Or(*aInvalidRegion, bounds);
8651 0 : break;
8652 : }
8653 : }
8654 : }
8655 4 : }
8656 :
8657 : void
8658 5 : nsDisplayMask::PaintAsLayer(nsDisplayListBuilder* aBuilder,
8659 : gfxContext* aCtx,
8660 : LayerManager* aManager)
8661 : {
8662 5 : MOZ_ASSERT(!ShouldPaintOnMaskLayer(aManager));
8663 :
8664 : // Clip the drawing target by mVisibleRect, which contains the visible
8665 : // region of the target frame and its out-of-flow and inflow descendants.
8666 5 : gfxContext* context = aCtx;
8667 :
8668 : Rect bounds =
8669 5 : NSRectToRect(mVisibleRect, mFrame->PresContext()->AppUnitsPerDevPixel());
8670 5 : bounds.RoundOut();
8671 5 : context->Clip(bounds);
8672 :
8673 5 : imgDrawingParams imgParams(aBuilder->ShouldSyncDecodeImages()
8674 : ? imgIContainer::FLAG_SYNC_DECODE
8675 5 : : imgIContainer::FLAG_SYNC_DECODE_IF_FAST);
8676 10 : nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
8677 : nsSVGIntegrationUtils::PaintFramesParams params(*aCtx,
8678 : mFrame, mVisibleRect,
8679 : borderArea, aBuilder,
8680 : aManager,
8681 5 : mHandleOpacity, imgParams);
8682 :
8683 5 : ComputeMaskGeometry(params);
8684 :
8685 5 : nsSVGIntegrationUtils::PaintMaskAndClipPath(params);
8686 :
8687 5 : context->PopClip();
8688 :
8689 5 : nsDisplayMaskGeometry::UpdateDrawResult(this, imgParams.result);
8690 5 : }
8691 :
8692 : #ifdef MOZ_DUMP_PAINTING
8693 : void
8694 0 : nsDisplayMask::PrintEffects(nsACString& aTo)
8695 : {
8696 : nsIFrame* firstFrame =
8697 0 : nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
8698 : nsSVGEffects::EffectProperties effectProperties =
8699 0 : nsSVGEffects::GetEffectProperties(firstFrame);
8700 0 : nsSVGClipPathFrame *clipPathFrame = effectProperties.GetClipPathFrame();
8701 0 : bool first = true;
8702 0 : aTo += " effects=(";
8703 0 : if (mFrame->StyleEffects()->mOpacity != 1.0f && mHandleOpacity) {
8704 0 : first = false;
8705 0 : aTo += nsPrintfCString("opacity(%f)", mFrame->StyleEffects()->mOpacity);
8706 : }
8707 0 : if (clipPathFrame) {
8708 0 : if (!first) {
8709 0 : aTo += ", ";
8710 : }
8711 0 : aTo += nsPrintfCString("clip(%s)", clipPathFrame->IsTrivial() ? "trivial" : "non-trivial");
8712 0 : first = false;
8713 : }
8714 0 : const nsStyleSVGReset *style = mFrame->StyleSVGReset();
8715 0 : if (style->HasClipPath() && !clipPathFrame) {
8716 0 : if (!first) {
8717 0 : aTo += ", ";
8718 : }
8719 0 : aTo += "clip(basic-shape)";
8720 0 : first = false;
8721 : }
8722 :
8723 0 : nsTArray<nsSVGMaskFrame*> masks = effectProperties.GetMaskFrames();
8724 0 : if (!masks.IsEmpty() && masks[0]) {
8725 0 : if (!first) {
8726 0 : aTo += ", ";
8727 : }
8728 0 : aTo += "mask";
8729 : }
8730 0 : aTo += ")";
8731 0 : }
8732 : #endif
8733 :
8734 0 : nsDisplayFilter::nsDisplayFilter(nsDisplayListBuilder* aBuilder,
8735 : nsIFrame* aFrame, nsDisplayList* aList,
8736 0 : bool aHandleOpacity)
8737 0 : : nsDisplaySVGEffects(aBuilder, aFrame, aList, aHandleOpacity)
8738 : {
8739 0 : MOZ_COUNT_CTOR(nsDisplayFilter);
8740 0 : }
8741 :
8742 : #ifdef NS_BUILD_REFCNT_LOGGING
8743 0 : nsDisplayFilter::~nsDisplayFilter()
8744 : {
8745 0 : MOZ_COUNT_DTOR(nsDisplayFilter);
8746 0 : }
8747 : #endif
8748 :
8749 : already_AddRefed<Layer>
8750 0 : nsDisplayFilter::BuildLayer(nsDisplayListBuilder* aBuilder,
8751 : LayerManager* aManager,
8752 : const ContainerLayerParameters& aContainerParameters)
8753 : {
8754 0 : if (!ValidateSVGFrame()) {
8755 0 : return nullptr;
8756 : }
8757 :
8758 0 : if (mFrame->StyleEffects()->mOpacity == 0.0f && mHandleOpacity) {
8759 0 : return nullptr;
8760 : }
8761 :
8762 : nsIFrame* firstFrame =
8763 0 : nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
8764 : nsSVGEffects::EffectProperties effectProperties =
8765 0 : nsSVGEffects::GetEffectProperties(firstFrame);
8766 :
8767 0 : if (effectProperties.HasInvalidFilter()) {
8768 0 : return nullptr;
8769 : }
8770 :
8771 0 : MOZ_ASSERT(effectProperties.mFilter && mFrame->StyleEffects()->HasFilters(),
8772 : "By getting here, we must have valid CSS filters.");
8773 :
8774 0 : ContainerLayerParameters newContainerParameters = aContainerParameters;
8775 0 : newContainerParameters.mDisableSubpixelAntialiasingInDescendants = true;
8776 :
8777 : RefPtr<ContainerLayer> container = aManager->GetLayerBuilder()->
8778 0 : BuildContainerLayerFor(aBuilder, aManager, mFrame, this, &mList,
8779 0 : newContainerParameters, nullptr);
8780 :
8781 0 : LayerState state = this->GetLayerState(aBuilder, aManager, newContainerParameters);
8782 0 : if (container && state != LAYER_SVG_EFFECTS) {
8783 0 : const nsTArray<nsStyleFilter>& filters = mFrame->StyleEffects()->mFilters;
8784 0 : nsTArray<layers::CSSFilter> cssFilters = nsTArray<layers::CSSFilter>(filters.Length());
8785 0 : for (const nsStyleFilter& filter : filters) {
8786 0 : cssFilters.AppendElement(ToCSSFilter(filter));
8787 : }
8788 :
8789 0 : container->SetFilterChain(Move(cssFilters));
8790 : }
8791 :
8792 0 : return container.forget();
8793 : }
8794 :
8795 0 : bool nsDisplayFilter::TryMerge(nsDisplayItem* aItem)
8796 : {
8797 0 : if (aItem->GetType() != TYPE_FILTER) {
8798 0 : return false;
8799 : }
8800 :
8801 : // items for the same content element should be merged into a single
8802 : // compositing group.
8803 : // aItem->Frame() returns non-null because it's nsDisplayFilter
8804 0 : if (aItem->Frame()->GetContent() != mFrame->GetContent()) {
8805 0 : return false;
8806 : }
8807 0 : if (aItem->GetClipChain() != GetClipChain()) {
8808 0 : return false;
8809 : }
8810 :
8811 0 : nsDisplayFilter* other = static_cast<nsDisplayFilter*>(aItem);
8812 0 : MergeFromTrackingMergedFrames(other);
8813 0 : mEffectsBounds.UnionRect(mEffectsBounds,
8814 0 : other->mEffectsBounds + other->mFrame->GetOffsetTo(mFrame));
8815 :
8816 0 : return true;
8817 : }
8818 :
8819 : LayerState
8820 0 : nsDisplayFilter::GetLayerState(nsDisplayListBuilder* aBuilder,
8821 : LayerManager* aManager,
8822 : const ContainerLayerParameters& aParameters)
8823 : {
8824 0 : if (mFrame->IsFrameOfType(nsIFrame::eSVG)) {
8825 0 : return LAYER_SVG_EFFECTS;
8826 : }
8827 :
8828 0 : if (!ShouldUseAdvancedLayer(aManager, gfxPrefs::LayersAllowFilterLayers)) {
8829 0 : return LAYER_SVG_EFFECTS;
8830 : }
8831 :
8832 0 : if (mFrame->StyleEffects()->mOpacity != 1.0f) {
8833 0 : return LAYER_SVG_EFFECTS;
8834 : }
8835 :
8836 : // Due to differences in the way that WebRender filters operate
8837 : // only the brightness and contrast filters use that path. We
8838 : // can gradually enable more filters as WebRender bugs are fixed.
8839 0 : for (const nsStyleFilter& filter : mFrame->StyleEffects()->mFilters) {
8840 0 : if (filter.GetType() != NS_STYLE_FILTER_BRIGHTNESS &&
8841 0 : filter.GetType() != NS_STYLE_FILTER_CONTRAST &&
8842 0 : filter.GetType() != NS_STYLE_FILTER_GRAYSCALE &&
8843 0 : filter.GetType() != NS_STYLE_FILTER_INVERT &&
8844 0 : filter.GetType() != NS_STYLE_FILTER_SEPIA) {
8845 0 : return LAYER_SVG_EFFECTS;
8846 : }
8847 : }
8848 :
8849 0 : return LAYER_ACTIVE;
8850 : }
8851 :
8852 0 : bool nsDisplayFilter::ComputeVisibility(nsDisplayListBuilder* aBuilder,
8853 : nsRegion* aVisibleRegion)
8854 : {
8855 0 : nsPoint offset = ToReferenceFrame();
8856 : nsRect dirtyRect =
8857 0 : nsSVGIntegrationUtils::GetRequiredSourceForInvalidArea(mFrame,
8858 0 : mVisibleRect - offset) +
8859 0 : offset;
8860 :
8861 : // Our children may be made translucent or arbitrarily deformed so we should
8862 : // not allow them to subtract area from aVisibleRegion.
8863 0 : nsRegion childrenVisible(dirtyRect);
8864 : nsRect r = dirtyRect.Intersect(
8865 0 : mList.GetClippedBoundsWithRespectToASR(aBuilder, mActiveScrolledRoot));
8866 0 : mList.ComputeVisibilityForSublist(aBuilder, &childrenVisible, r);
8867 0 : return true;
8868 : }
8869 :
8870 : void
8871 0 : nsDisplayFilter::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
8872 : const nsDisplayItemGeometry* aGeometry,
8873 : nsRegion* aInvalidRegion)
8874 : {
8875 0 : nsDisplaySVGEffects::ComputeInvalidationRegion(aBuilder, aGeometry,
8876 0 : aInvalidRegion);
8877 :
8878 : const nsDisplayFilterGeometry* geometry =
8879 0 : static_cast<const nsDisplayFilterGeometry*>(aGeometry);
8880 :
8881 0 : if (aBuilder->ShouldSyncDecodeImages() &&
8882 0 : geometry->ShouldInvalidateToSyncDecodeImages()) {
8883 : bool snap;
8884 0 : nsRect bounds = GetBounds(aBuilder, &snap);
8885 0 : aInvalidRegion->Or(*aInvalidRegion, bounds);
8886 : }
8887 0 : }
8888 :
8889 : void
8890 0 : nsDisplayFilter::PaintAsLayer(nsDisplayListBuilder* aBuilder,
8891 : gfxContext* aCtx,
8892 : LayerManager* aManager)
8893 : {
8894 0 : imgDrawingParams imgParams(aBuilder->ShouldSyncDecodeImages()
8895 : ? imgIContainer::FLAG_SYNC_DECODE
8896 0 : : imgIContainer::FLAG_SYNC_DECODE_IF_FAST);
8897 0 : nsRect borderArea = nsRect(ToReferenceFrame(), mFrame->GetSize());
8898 : nsSVGIntegrationUtils::PaintFramesParams params(*aCtx,
8899 : mFrame, mVisibleRect,
8900 : borderArea, aBuilder,
8901 : aManager,
8902 0 : mHandleOpacity, imgParams);
8903 0 : nsSVGIntegrationUtils::PaintFilter(params);
8904 0 : nsDisplayFilterGeometry::UpdateDrawResult(this, imgParams.result);
8905 0 : }
8906 :
8907 : #ifdef MOZ_DUMP_PAINTING
8908 : void
8909 0 : nsDisplayFilter::PrintEffects(nsACString& aTo)
8910 : {
8911 : nsIFrame* firstFrame =
8912 0 : nsLayoutUtils::FirstContinuationOrIBSplitSibling(mFrame);
8913 : nsSVGEffects::EffectProperties effectProperties =
8914 0 : nsSVGEffects::GetEffectProperties(firstFrame);
8915 0 : bool first = true;
8916 0 : aTo += " effects=(";
8917 0 : if (mFrame->StyleEffects()->mOpacity != 1.0f && mHandleOpacity) {
8918 0 : first = false;
8919 0 : aTo += nsPrintfCString("opacity(%f)", mFrame->StyleEffects()->mOpacity);
8920 : }
8921 0 : if (effectProperties.HasValidFilter()) {
8922 0 : if (!first) {
8923 0 : aTo += ", ";
8924 : }
8925 0 : aTo += "filter";
8926 : }
8927 0 : aTo += ")";
8928 0 : }
8929 : #endif
8930 :
8931 : namespace mozilla {
8932 :
8933 : uint32_t PaintTelemetry::sPaintLevel = 0;
8934 : uint32_t PaintTelemetry::sMetricLevel = 0;
8935 : EnumeratedArray<PaintTelemetry::Metric,
8936 : PaintTelemetry::Metric::COUNT,
8937 3 : double> PaintTelemetry::sMetrics;
8938 :
8939 32 : PaintTelemetry::AutoRecordPaint::AutoRecordPaint()
8940 : {
8941 : // Don't record nested paints.
8942 32 : if (sPaintLevel++ > 0) {
8943 0 : return;
8944 : }
8945 :
8946 : // Reset metrics for a new paint.
8947 128 : for (auto& metric : sMetrics) {
8948 96 : metric = 0.0;
8949 : }
8950 32 : mStart = TimeStamp::Now();
8951 : }
8952 :
8953 33 : PaintTelemetry::AutoRecordPaint::~AutoRecordPaint()
8954 : {
8955 32 : MOZ_ASSERT(sPaintLevel != 0);
8956 32 : if (--sPaintLevel > 0) {
8957 31 : return;
8958 : }
8959 :
8960 : // If we're in multi-process mode, don't include paint times for the parent
8961 : // process.
8962 32 : if (gfxVars::BrowserTabsRemoteAutostart() && XRE_IsParentProcess()) {
8963 30 : return;
8964 : }
8965 :
8966 2 : double totalMs = (TimeStamp::Now() - mStart).ToMilliseconds();
8967 :
8968 : // Record the total time.
8969 2 : Telemetry::Accumulate(Telemetry::CONTENT_PAINT_TIME, static_cast<uint32_t>(totalMs));
8970 :
8971 : // If the total time was >= 16ms, then it's likely we missed a frame due to
8972 : // painting. In this case we'll gather some detailed metrics below.
8973 2 : if (totalMs <= 16.0) {
8974 1 : return;
8975 : }
8976 :
8977 7 : auto record = [=](const char* aKey, double aDurationMs) -> void {
8978 7 : MOZ_ASSERT(aDurationMs <= totalMs);
8979 :
8980 7 : uint32_t amount = static_cast<int32_t>((aDurationMs / totalMs) * 100.0);
8981 :
8982 14 : nsDependentCString key(aKey);
8983 7 : Telemetry::Accumulate(Telemetry::CONTENT_LARGE_PAINT_PHASE_WEIGHT, key, amount);
8984 8 : };
8985 :
8986 1 : double dlMs = sMetrics[Metric::DisplayList];
8987 1 : double flbMs = sMetrics[Metric::Layerization];
8988 1 : double rMs = sMetrics[Metric::Rasterization];
8989 :
8990 : // Record all permutations since aggregation makes it difficult to
8991 : // correlate. For example we can't derive "flb+r" from "dl" because we
8992 : // don't know the total time associated with a bucket entry. So we just
8993 : // play it safe and include everything. We can however derive "other" time
8994 : // from the final permutation.
8995 1 : record("dl", dlMs);
8996 1 : record("flb", flbMs);
8997 1 : record("r", rMs);
8998 1 : record("dl,flb", dlMs + flbMs);
8999 1 : record("dl,r", dlMs + rMs);
9000 1 : record("flb,r", flbMs + rMs);
9001 1 : record("dl,flb,r", dlMs + flbMs + rMs);
9002 32 : }
9003 :
9004 117 : PaintTelemetry::AutoRecord::AutoRecord(Metric aMetric)
9005 117 : : mMetric(aMetric)
9006 : {
9007 : // Don't double-record anything nested.
9008 117 : if (sMetricLevel++ > 0) {
9009 36 : return;
9010 : }
9011 :
9012 : // Don't record inside nested paints, or outside of paints.
9013 81 : if (sPaintLevel != 1) {
9014 5 : return;
9015 : }
9016 :
9017 76 : mStart = TimeStamp::Now();
9018 : }
9019 :
9020 193 : PaintTelemetry::AutoRecord::~AutoRecord()
9021 : {
9022 117 : MOZ_ASSERT(sMetricLevel != 0);
9023 :
9024 117 : sMetricLevel--;
9025 117 : if (mStart.IsNull()) {
9026 41 : return;
9027 : }
9028 :
9029 76 : sMetrics[mMetric] += (TimeStamp::Now() - mStart).ToMilliseconds();
9030 117 : }
9031 :
9032 : } // namespace mozilla
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