Bug 40751

Summary: Composited iframe renders over content in the parent document
Product: WebKit Reporter: Grace Kloba <klobag>
Component: Layout and RenderingAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: igor.oliveira, mitz, simon.fraser
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: PC   
OS: OS X 10.5   
Attachments:
Description Flags
test files none

Grace Kloba
Reported 2010-06-16 18:13:16 PDT
Created attachment 58949 [details] test files Please open top.html in the attachment. In Safari 5.0 or nightly build, "main frame top" should be on top of the iframe. But it renders below the composite layer. If you scroll to the bottom of the iframe, the red text is correctly under "main frame top". I think the problem is the main frame should create a new composite layer for the content above iframe when iframe contains composite layers.
Attachments
test files (101.92 KB, application/zip)
2010-06-16 18:13 PDT, Grace Kloba 		no flags
Details
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Simon Fraser (smfr)
Comment 1 2010-06-17 17:32:33 PDT
I'm not sure why the overlap testing is not working.
Simon Fraser (smfr)
Comment 2 2010-06-17 17:32:54 PDT
<rdar://problem/8105855>
Simon Fraser (smfr)
Comment 3 2010-06-17 21:00:04 PDT
The overlap testing is failing because we only do overlap testing on RendersLayers. Also, if the "main frame top" div is put into a RenderLayer (e.g. with position: relative), then we use the layer bounds for tesing overlap, but those don't include the character ascenders here.
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