RESOLVED FIXED 42338
Avoid creating huge compositing layers for elements that project outside the viewport 
https://bugs.webkit.org/show_bug.cgi?id=42338
Summary Avoid creating huge compositing layers for elements that project outside the ...
Simon Fraser (smfr)
Reported Thursday, July 15, 2010 6:51:02 AM UTC
When a page has an abs. pos. div at -1000px, -1000px, or uses text-indent: -9999px, then we should avoid making huge, tiled compositing layers to try to encompass these elements. More practically, this means constraining compositing layer size to the size of the enclosing document, or the enclosing overflow div.
Attachments
Patch (35.45 KB, patch)
2010-07-14 23:01 PDT, Simon Fraser (smfr) 		no flags
DetailsFormatted DiffDiff
Patch (49.85 KB, patch)
2010-07-15 12:27 PDT, Simon Fraser (smfr) 		mitz: review+
DetailsFormatted DiffDiff
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Simon Fraser (smfr)
Comment 1 Thursday, July 15, 2010 6:51:31 AM UTC
<rdar://problem/8187624>
Simon Fraser (smfr)
Comment 2 Thursday, July 15, 2010 7:01:07 AM UTC
Created attachment 61609 [details] Patch
Simon Fraser (smfr)
Comment 3 Thursday, July 15, 2010 7:02:22 AM UTC
Comment on attachment 61609 [details] Patch Not yet ready for review. enclosingOverflowScrollAncestor() should look for any overflow/clipping, not just those that result in scrolling.
Simon Fraser (smfr)
Comment 4 Thursday, July 15, 2010 7:04:05 AM UTC
Comment on attachment 61609 [details] Patch s/convertContainerToLocalQuadI/convertContainerToLocalQuad
Simon Fraser (smfr)
Comment 5 Thursday, July 15, 2010 8:27:46 PM UTC
Created attachment 61701 [details] Patch
Simon Fraser (smfr)
Comment 6 Thursday, July 15, 2010 9:09:58 PM UTC
http://trac.webkit.org/changeset/63452
WebKit Review Bot
Comment 7 Thursday, July 15, 2010 9:43:26 PM UTC
http://trac.webkit.org/changeset/63452 might have broken SnowLeopard Intel Release (Tests)
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