RESOLVED FIXED 26430
With accelerated compositing, elements can jump when gaining backing 
https://bugs.webkit.org/show_bug.cgi?id=26430
Summary With accelerated compositing, elements can jump when gaining backing
Simon Fraser (smfr)
Reported Tuesday, June 16, 2009 6:12:30 AM UTC
When RenderLayers become compositing because of a 3d transform or a transition, they sometimes jump around incorrectly. This happens when some other element with backing projects above/to the left of the document.
Attachments
Testcase (994 bytes, text/html)
2009-06-15 22:12 PDT, Simon Fraser (smfr) 		no flags
Details
Patch, testcase, changelog (24.35 KB, patch)
2009-06-22 15:39 PDT, Simon Fraser (smfr) 		hyatt: review+
DetailsFormatted DiffDiff
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Simon Fraser (smfr)
Comment 1 Tuesday, June 16, 2009 6:12:39 AM UTC
Created attachment 31332 [details] Testcase
Simon Fraser (smfr)
Comment 2 Tuesday, June 16, 2009 7:14:54 AM UTC
The bug is that in rebuildCompositingLayerTree() the answer to calculateCompositedBounds() changes as later siblings become composited.
Simon Fraser (smfr)
Comment 3 Tuesday, June 16, 2009 5:52:02 PM UTC
<rdar://problem/6944442>
Simon Fraser (smfr)
Comment 4 Monday, June 22, 2009 11:39:06 PM UTC
Created attachment 31680 [details] Patch, testcase, changelog
Dave Hyatt
Comment 5 Monday, June 22, 2009 11:40:43 PM UTC
Comment on attachment 31680 [details] Patch, testcase, changelog r=me
Simon Fraser (smfr)
Comment 6 Monday, June 22, 2009 11:45:41 PM UTC
http://trac.webkit.org/changeset/44961
Simon Fraser (smfr)
Comment 7 Tuesday, July 14, 2009 11:46:55 PM UTC
*** Bug 27272 has been marked as a duplicate of this bug. ***
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