Bug 26430

Summary: With accelerated compositing, elements can jump when gaining backing
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Layout and RenderingAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: m
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: Mac   
OS: OS X 10.5   
Attachments:
Description Flags
Testcase
none
Patch, testcase, changelog hyatt: review+

Simon Fraser (smfr)
Reported 2009-06-15 22:12:30 PDT
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
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2009-06-15 22:12:39 PDT
Created attachment 31332 [details] Testcase
Simon Fraser (smfr)
Comment 2 2009-06-15 23:14:54 PDT
The bug is that in rebuildCompositingLayerTree() the answer to calculateCompositedBounds() changes as later siblings become composited.
Simon Fraser (smfr)
Comment 3 2009-06-16 09:52:02 PDT
<rdar://problem/6944442>
Simon Fraser (smfr)
Comment 4 2009-06-22 15:39:06 PDT
Created attachment 31680 [details] Patch, testcase, changelog
Dave Hyatt
Comment 5 2009-06-22 15:40:43 PDT
Comment on attachment 31680 [details] Patch, testcase, changelog r=me
Simon Fraser (smfr)
Comment 6 2009-06-22 15:45:41 PDT
http://trac.webkit.org/changeset/44961
Simon Fraser (smfr)
Comment 7 2009-07-14 15:46:55 PDT
*** Bug 27272 has been marked as a duplicate of this bug. ***
Note You need to log in before you can comment on or make changes to this bug.