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patch to Bug 1363423

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This commit is contained in:
Fedor 2019-07-08 13:07:53 +03:00
parent 8feaeace21
commit 890db8ece1
1 changed files with 5 additions and 0 deletions
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5
layout/base/FrameLayerBuilder.cpp
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@ -3648,6 +3648,10 @@ PaintedLayerData::AccumulateEventRegions(ContainerState* aState, nsDisplayLayerE
if (alreadyHadRegions) { if (alreadyHadRegions) {
mDispatchToContentHitRegion.OrWith(CombinedTouchActionRegion()); mDispatchToContentHitRegion.OrWith(CombinedTouchActionRegion());
} }
// Avoid quadratic performance as a result of the region growing to include
// and arbitrarily large number of rects, which can happen on some pages.
mMaybeHitRegion.SimplifyOutward(8);
// Calculate scaled versions of the bounds of mHitRegion and mMaybeHitRegion // Calculate scaled versions of the bounds of mHitRegion and mMaybeHitRegion
// for quick access in FindPaintedLayerFor(). // for quick access in FindPaintedLayerFor().
@ -6368,3 +6372,4 @@ ContainerState::CreateMaskLayer(Layer *aLayer,
} }
} // namespace mozilla } // namespace mozilla