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Bug 1621478 - Drop mPropagateComponentAlphaFlattening. r=mstange

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It hasn't been used since bug 1435643.

Differential Revision: https://phabricator.services.mozilla.com/D66334
This commit is contained in:
Hiroyuki Ikezoe 2020-04-23 00:47:26 +00:00
parent 2dfc5e12ad
commit 4dc36ef4af
1 changed files with 0 additions and 11 deletions
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11
layout/painting/FrameLayerBuilder.cpp
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@ -852,7 +852,6 @@ struct NewLayerEntry {
mLayerState(LayerState::LAYER_INACTIVE),
mHideAllLayersBelow(false),
mOpaqueForAnimatedGeometryRootParent(false),
mPropagateComponentAlphaFlattening(true),
mUntransformedVisibleRegion(false),
mIsFixedToRootScrollFrame(false) {}
// mLayer is null if the previous entry is for a PaintedLayer that hasn't
@ -885,9 +884,6 @@ struct NewLayerEntry {
// mAnimatedGeometryRoot->GetParent().
bool mOpaqueForAnimatedGeometryRootParent;
// If true, then the content flags for this layer should contribute
// to our decision to flatten component alpha layers, false otherwise.
bool mPropagateComponentAlphaFlattening;
// mVisibleRegion is relative to the associated frame before
// transform.
bool mUntransformedVisibleRegion;
@ -5002,13 +4998,6 @@ void ContainerState::ProcessDisplayItems(nsDisplayList* aList) {
nsLayoutUtils::IsReallyFixedPos(item->Frame());
}
// Don't attempt to flatten compnent alpha layers that are within
// a forced active layer, or an active transform;
if (itemType == DisplayItemType::TYPE_TRANSFORM ||
layerState == LayerState::LAYER_ACTIVE_FORCE) {
newLayerEntry->mPropagateComponentAlphaFlattening = false;
}
float contentXScale = 1.0f;
float contentYScale = 1.0f;
if (ContainerLayer* ownContainer = ownLayer->AsContainerLayer()) {