Bug 30425 - Compositing layers not correctly updated after partial layout
Summary: Compositing layers not correctly updated after partial layout
Alias: None
Product: WebKit
Classification: Unclassified
Component: Layout and Rendering (show other bugs)
Version: 528+ (Nightly build)
Hardware: Mac OS X 10.5
: P2 Normal
Assignee: Simon Fraser (smfr)
Depends on:
Reported: 2009-10-15 21:13 PDT by Simon Fraser (smfr)
Modified: 2009-10-18 10:18 PDT (History)
0 users

See Also:

Testcase (1.07 KB, text/html)
2009-10-15 21:13 PDT, Simon Fraser (smfr)
no flags Details
WIP patch (5.92 KB, patch)
2009-10-15 21:34 PDT, Simon Fraser (smfr)
no flags Details | Formatted Diff | Diff
Patch (10.70 KB, patch)
2009-10-18 09:52 PDT, Simon Fraser (smfr)
mitz: review+
Details | Formatted Diff | Diff

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Description Simon Fraser (smfr) 2009-10-15 21:13:05 PDT
Created attachment 41263 [details]

When a partial layout happens (with a non-null subroot), some compositing layers can be left un-updated, and thus display in the wrong positions. This happens because RenderLayerBacking::updateAfterLayout() assumes that some parent layer is going to update the geometry this layer, but, in the case of a partial layout, the parent layer may not be affected by layout.
Comment 1 Simon Fraser (smfr) 2009-10-15 21:34:52 PDT
Created attachment 41264 [details]
WIP patch
Comment 2 Simon Fraser (smfr) 2009-10-18 09:52:39 PDT
Created attachment 41380 [details]
Comment 3 mitz 2009-10-18 10:04:07 PDT
Comment on attachment 41380 [details]

> +        When a partial layout happend, for example as the result of a postion-change-only

Typo: happend.

Comment 4 Simon Fraser (smfr) 2009-10-18 10:18:03 PDT