282727 2024-11-06 16:45:48 -0800 updateAllowsBackingStoreDetaching has wrong coordinates when inside an animated transform 2024-12-03 07:01:38 -0800 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 282267 1 mattwoodrow mattwoodrow bfulgham simon.fraser webkit-bug-importer zalan oldest_to_newest 2073337 0 mattwoodrow 2024-11-06 16:45:48 -0800 When descending through a layer that has an animated transform, the layerExtent is computed using the post-transform animation extents and the transform itself isn't pushed onto the geometry map. That means for all descendants, overlap bounds are no longer 'absolute', since they aren't transformed. This generally works ok for overlap testing, since everything within the transform stacking context is in the same coordinate space. updateAllowsBackingStoreDetaching compares these untransformed coordinates against the layout viewport though, and this is invalid, leading to backing stores not being detached. 2073338 1 webkit-bug-importer 2024-11-06 16:45:59 -0800 <rdar://problem/139393911> 2073348 2 mattwoodrow 2024-11-06 17:02:39 -0800 Pull request: https://github.com/WebKit/WebKit/pull/36301 2074724 3 ews-feeder 2024-11-12 20:27:55 -0800 Committed 286517@main (43d5c16a35e7): <https://commits.webkit.org/286517@main> Reviewed commits have been landed. Closing PR #36301 and removing active labels. 2078803 4 ews-feeder 2024-12-03 07:01:38 -0800 Committed 283286.548@safari-7620-branch (84c1168aa3b8): <https://commits.webkit.org/283286.548@safari-7620-branch> Reviewed commits have been landed. Closing PR #2348 and removing active labels.