Bug 27021

Summary: Make use of geometry information to decide which layers become composited
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Layout and RenderingAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal Keywords: InRadar
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Mac   
OS: OS X 10.5   
Attachments:
Description Flags
Patch, changelog hyatt: review+

Simon Fraser (smfr)
Reported 2009-07-06 22:20:32 PDT
The current RenderLayerCompositor algorithm only makes use of painting order trees when deciding which layers should be composited. This means that an element like <video> can kick a bunch of non-overlapping elements into compositing layers, with resulting impact on text antialiasing. We can improve the RenderLayerCompositor algorithm to look at overlap.
Attachments
Patch, changelog (30.84 KB, patch)
2009-07-06 23:30 PDT, Simon Fraser (smfr) 		hyatt: review+
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 2009-07-06 22:21:26 PDT
<rdar://problem/7011947>
Simon Fraser (smfr)
Comment 2 2009-07-06 23:30:17 PDT
Created attachment 32362 [details] Patch, changelog
Dave Hyatt
Comment 3 2009-07-07 10:10:56 PDT
Comment on attachment 32362 [details] Patch, changelog r=me
Simon Fraser (smfr)
Comment 4 2009-07-07 10:15:37 PDT
http://trac.webkit.org/changeset/45598
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