Open Bug 1668413 Opened 4 years ago Updated 3 years ago

Z-index is not correct during animation

Categories

(Core :: Web Painting, defect, P3)

Product:
Core
Component:
Web Painting
Platform:
Desktop
Windows 10
Type:
defect

Tracking

()

Tracking Flags:
Tracking Status
firefox-esr78 --- unaffected
firefox81 --- disabled
firefox82 --- disabled
firefox83 --- disabled
firefox86 --- disabled
firefox87 --- disabled
firefox88 --- disabled

People

(Reporter: alice0775, Unassigned)

References

(Blocks 1 open bug, Regression,
URL
)

Details

(Keywords: nightly-community, regression)

The problem is only occur on Basic or Direct3D 11 (Advanced Layers).

Steps to reproduce:

  1. Disable WebRender or Disable HWA
  2. Open https://3dtransforms.desandro.com/carousel
  3. Scroll to bottom so that last example will be in view port
  4. Switch orientations Horizontal to Vertical

Actual Results:
Z-index is not correct during animation.
i.e
The slider is lowest z-index during animation.
Then, slider becomes top of z-index after animation.

Expected results:
the slider should be always top of z-index.

Regresson window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=5786eef0515a77d3fe7656c5bb1a7a5def4e0ab9&tochange=d67ac396d0f9d67c092672fcac1998edbbd07aed

Component: Layout → Web Painting
See Also: → 1668170
Severity: -- → S3
Priority: -- → P3
Has Regression Range: --- → yes
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