1727228 - Consider factoring ancestor transforms and resolutions in GetPaintedLayerScaleForFrame

Status: RESOLVED DUPLICATE of bug 1732660

(Core :: Layout: Scrolling and Overflow, defect)

Description

[Hiroyuki Ikezoe (:hiro)]

Attachment: A patch to add a reftest which fails

In GetPaintedLayerScaleForFrame we use the in-process resolution and ancestor transforms in the same process, that means it doesn't properly handle OOP iframe cases.

Attaching file has a changeset to add a reftest, the reference file opens an in-process iframe loading a test case introduced in bug 1012752 (the bug originally introduced relevant code in question) and the test file loads the same test case in a cross-origin iframe, thus GetPaintedLayerScaleForFrame returns different values in those cases.

That said, the reftest fails on non Fission too I don't quite understand what makes the test fail. I am not sure where the underlying issue is. So I am not particularly concerned this issue for Fission.

Comment 1

[Botond Ballo [:botond]]

Looks like this is being taken care of in bug 1732660.