Created attachment 463952 [details] Patch

Created attachment 463954 [details] Patch

Comment on attachment 463954 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=463954&action=review > Source/WebCore/rendering/RenderObject.cpp:874 > + return ancestorRenderer.effectiveOverflowX() != Overflow::Visible && ancestorRenderer.effectiveOverflowY() != Overflow::Visible; hasNonVisibleOverflow()? > LayoutTests/fast/repaint/incorrect-repaint-when-child-layer-overflows.html:42 > + document.body.offsetHeight; The rendering update should do the layout. > LayoutTests/fast/repaint/incorrect-repaint-when-child-layer-overflows.html:49 > + wrapper.style.transform = "translateY(0)"; > + contents.style.visibility = "visible"; My preferred way to do this is just `document.body.classList.add('changed')` and then just write style rules to match.

Comment on attachment 463954 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=463954&action=review > LayoutTests/fast/repaint/incorrect-repaint-when-child-layer-overflows.html:27 > + z-index: -10; Is the negative z-index needed?

Created attachment 463960 [details] [fast-cq]Patch

(In reply to Simon Fraser (smfr) from comment #3) > Comment on attachment 463954 [details] > Patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=463954&action=review > > > Source/WebCore/rendering/RenderObject.cpp:874 > > + return ancestorRenderer.effectiveOverflowX() != Overflow::Visible && ancestorRenderer.effectiveOverflowY() != Overflow::Visible; > > hasNonVisibleOverflow()? Oh, the cached bit on the renderer! Yeah, good point (though I find the function name a bit misleading. To me, hasNonVisibleOverflow() on a renderer means actual overflow in layout terms and not in style terms). > > > LayoutTests/fast/repaint/incorrect-repaint-when-child-layer-overflows.html:42 > > + document.body.offsetHeight; > > The rendering update should do the layout. cool, removed both calls. > > > LayoutTests/fast/repaint/incorrect-repaint-when-child-layer-overflows.html:49 > > + wrapper.style.transform = "translateY(0)"; > > + contents.style.visibility = "visible"; > > My preferred way to do this is just `document.body.classList.add('changed')` > and then just write style rules to match. I like seeing the actual changes in the script, it's easier for me to tell what's going on. I'd prefer to keep it this way unless you feel strongly about it. >> LayoutTests/fast/repaint/incorrect-repaint-when-child-layer-overflows.html:27 >> + z-index: -10; >Is the negative z-index needed? Surely not, moved the .ref _before_ the test content.

Committed 257627@main (7ca99fc4ae5f): <https://commits.webkit.org/257627@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 463960 [details].