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Bug 1465616 - Remove call to AlignFixedAndStickyLayers for RCD-RSF. r=botond

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MozReview-Commit-ID: B8HH6mbjTnv

--HG--
extra : rebase_source : 15eff992861e9a51b40a580df57067bfc5b88760
This commit is contained in:
Kashav Madan 2018-07-04 15:52:03 -04:00
parent 5261c87fd1
commit bf18fe089c
1 changed files with 11 additions and 3 deletions
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14
gfx/layers/composite/AsyncCompositionManager.cpp
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@ -1068,9 +1068,17 @@ AsyncCompositionManager::ApplyAsyncContentTransformToTree(Layer *aLayer,
* CompleteAsyncTransform(
AdjustForClip(asyncTransformWithoutOverscroll, layer));
AlignFixedAndStickyLayers(layer, layer, metrics.GetScrollId(), oldTransform,
transformWithoutOverscrollOrOmta, fixedLayerMargins,
&clipPartsCache);
// When applying transformations to the RCD-RSF with zoom-enabled,
// avoid re-aligning fixed/sticky layers to make them appear static
// relative to the visual viewport.
//
// This is a partial fix and will require changes to how the async
// transform is computed, which will be done in Bug 1465618.
if (!metrics.IsRootContent() || !gfxPrefs::APZAllowZooming()) {
AlignFixedAndStickyLayers(layer, layer, metrics.GetScrollId(), oldTransform,
transformWithoutOverscrollOrOmta, fixedLayerMargins,
&clipPartsCache);
}
// Combine the local clip with the ancestor scrollframe clip. This is not
// included in the async transform above, since the ancestor clip should not