Bug 116827

Summary:

[CSS Regions] Elements with 3D transforms do not create composited layers

Product:

WebKit

Reporter:

Mihai Balan <mibalan>

Component:

CSS

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED WORKSFORME

Severity:

Normal

CC:

mihnea, WebkitBugTracker

Priority:

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

Bug Blocks:

57312

Attachments:

Description	Flags
Test-case	none
Test-case	none

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]
Test-case

Comment 2 Mihai Balan 2013-06-02 08:49:07 PDT

Created attachment 203525 [details]
Test-case

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.