There may be cases where we haven't made a compositing layer for something that needs to be moved around by a positioned node, but maybe we've composited a descendant. We should probably do explicit compositing in some cases.
<rdar://problem/48867502>
Created attachment 364611 [details] Testcase that needs this
Created attachment 364616 [details] Simpler case
Created attachment 365303 [details] Patch
Comment on attachment 365303 [details] Patch Attachment 365303 [details] did not pass mac-wk2-ews (mac-wk2): Output: https://webkit-queues.webkit.org/results/11576335 New failing tests: scrollingcoordinator/scrolling-tree/positioned-nodes.html http/wpt/mediarecorder/MediaRecorder-AV-audio-video-dataavailable.html
Created attachment 365321 [details] Archive of layout-test-results from ews106 for mac-highsierra-wk2 The attached test failures were seen while running run-webkit-tests on the mac-wk2-ews. Bot: ews106 Port: mac-highsierra-wk2 Platform: Mac OS X 10.13.6
Comment on attachment 365303 [details] Patch Attachment 365303 [details] did not pass ios-sim-ews (ios-simulator-wk2): Output: https://webkit-queues.webkit.org/results/11577245 New failing tests: scrollingcoordinator/scrolling-tree/positioned-nodes.html compositing/layer-creation/absolute-in-async-overflow-scroll.html
Created attachment 365329 [details] Archive of layout-test-results from ews122 for ios-simulator-wk2 The attached test failures were seen while running run-webkit-tests on the ios-sim-ews. Bot: ews122 Port: ios-simulator-wk2 Platform: Mac OS X 10.13.6
https://trac.webkit.org/r243209
Looks like the new test compositing/layer-creation/absolute-in-async-overflow-scroll.html from https://trac.webkit.org/changeset/243209/webkit is failing. History: http://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=compositing%2Flayer-creation%2Fabsolute-in-async-overflow-scroll.html Diff: --- /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/compositing/layer-creation/absolute-in-async-overflow-scroll-expected.txt +++ /Volumes/Data/slave/highsierra-release-tests-wk2/build/layout-test-results/compositing/layer-creation/absolute-in-async-overflow-scroll-actual.txt @@ -16,12 +16,12 @@ (GraphicsLayer (offsetFromRenderer width=1 height=1) (position 1.00 1.00) - (bounds 200.00 200.00) + (bounds 185.00 185.00) (children 1 (GraphicsLayer (offsetFromRenderer width=1 height=1) (anchor 0.00 0.00) - (bounds 200.00 840.00) + (bounds 185.00 841.00) (drawsContent 1) (children 1 (GraphicsLayer
Fixed in https://trac.webkit.org/r243228