third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp - Issue 1413363003: Always composite position: fixed elements with composited descendants.

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Unified Diff: third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp

Issue 1413363003: Always composite position: fixed elements with composited descendants. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Created 5 years, 2 months ago

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« third_party/WebKit/LayoutTests/compositing/update-paint-phases.html ('K') | « third_party/WebKit/LayoutTests/compositing/update-paint-phases.html ('k') | third_party/WebKit/Source/platform/graphics/CompositingReasons.h » ('j') | no next file with comments »
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Index: third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp

diff --git a/third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp b/third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp

index 5c804aa2fe4d6cf48456fbd46d32ef19db52ac3d..812b98be057cebb7fa1d558ef895168b8419468a 100644

--- a/third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp

+++ b/third_party/WebKit/Source/core/layout/compositing/CompositingRequirementsUpdater.cpp

@@ -168,6 +168,9 @@ static CompositingReasons subtreeReasonsForCompositing(PaintLayer* layer, bool h

// theres a poor interaction with LayoutTextControlSingleLine, which sets this hasOverflowClip directly.

if (layer->layoutObject()->hasClipOrOverflowClip())

subtreeReasons |= CompositingReasonClipsCompositingDescendants;

+ if (layer->layoutObject()->style()->position() == FixedPosition)

+ subtreeReasons |= CompositingReasonPositionFixedWithCompositedDescendants;

}

// A layer with preserve-3d or perspective only needs to be composited if there are descendant layers that