Bug 116827 - [CSS Regions] Elements with 3D transforms do not create composited layers
Summary: [CSS Regions] Elements with 3D transforms do not create composited layers
Alias: None
Product: WebKit
Classification: Unclassified
Component: CSS (show other bugs)
Version: 528+ (Nightly build)
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
Depends on:
Blocks: 57312
  Show dependency treegraph
Reported: 2013-05-27 07:47 PDT by Mihai Balan
Modified: 2014-02-04 06:53 PST (History)
2 users (show)

See Also:

Test-case (438 bytes, text/html)
2013-05-27 07:47 PDT, Mihai Balan
no flags Details
Test-case (1.06 KB, application/zip)
2013-06-02 08:49 PDT, Mihai Balan
no flags Details

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Description Mihai Balan 2013-05-27 07:47:22 PDT
Elements in the document flow (flow-into: none) create a composited layer when they have a 3D transform applied to them. When flowing such an element inside a named flow the composited layer isn't preserved/created anymore.

In the attached file, toggle between `flow-into: flow` and `flow-into: none` for the gray div with text - when flow-into is specified, a composited layer is no longer created (this can be inspected via the Debug > Drawing/Compositing flags > Show compositing borders or Debug > Show RenderLayer tree menu entries in Safari/WK nightly)
Comment 1 Mihai Balan 2013-05-27 07:47:45 PDT
Created attachment 202983 [details]
Comment 2 Mihai Balan 2013-06-02 08:49:07 PDT
Created attachment 203525 [details]
Comment 3 Michelangelo De Simone 2013-06-13 10:50:53 PDT
Still repros on today's nightly (r151543)
Comment 4 Mihnea Ovidenie 2014-02-04 06:53:03 PST
Fixed in WebKit nighly which was expected after we enabled ACC for elements displayed in regions.