310809 2026-03-26 05:47:44 -0700 [GTK][WPE] Sync initial `preserves3D` state for structural `GraphicsLayerCoordinated` 2026-03-26 07:09:41 -0700 1 1 1 Unclassified WebKit WPE WebKit WebKit Local Build Unspecified Unspecified RESOLVED FIXED P2 Normal --- 1 zimmermann zimmermann bugs-noreply oldest_to_newest 2193898 0 zimmermann 2026-03-26 05:47:44 -0700 Structural GraphicsLayers (e.g. viewport anchor layers for position:sticky) are initialized with preserves3D=true in the base GraphicsLayer constructor, but this value was never synced to the CoordinatedPlatformLayer because Change::Preserves3D was not included in the initial pending changes. Since the value is already true, subsequent setPreserves3D(true) calls early-return without noting the change. This caused the SkiaCompositingLayer to have preserves3D=false, breaking 3D rendering context layer collection for preserve-3d scenes containing sticky-positioned elements. Always include Change::Preserves3D in the initial sync. This is the only property with a conditional default (true for Type::Structural, false otherwise) that differs between GraphicsLayer and CoordinatedPlatformLayer. All other synced properties have matching defaults in both classes. 2193899 1 zimmermann 2026-03-26 05:50:46 -0700 Pull request: https://github.com/WebKit/WebKit/pull/61411 2193931 2 ews-feeder 2026-03-26 07:09:38 -0700 Committed 309989@main (2a377397b561): <https://commits.webkit.org/309989@main> Reviewed commits have been landed. Closing PR #61411 and removing active labels.