Open Bug 1661147 Opened 2 years ago Updated 7 months ago

[WebRender] blurred content is mispositioned, in abspos within fixedpos

Categories

(Core :: Graphics: WebRender, defect)

defect

Tracking

()

Webcompat Priority P3
Tracking Status
firefox-esr68 --- unaffected
firefox-esr78 --- disabled
firefox79 --- wontfix
firefox80 --- wontfix
firefox81 --- wontfix
firefox82 --- fix-optional

People

(Reporter: dholbert, Assigned: gw)

References

(Blocks 1 open bug, Regression)

Details

(Keywords: correctness, regression)

Attachments

(2 files)

Attached file testcase 1

STR:

  1. Load attached testcase.

ACTUAL RESULTS:
Blurred red fringe at top left.

EXPECTED RESULTS:
No red fringe. (The red area should be offscreen.)

Firefox Nightly with WebRender enabled gives ACTUAL RESULTS.
If I disable WebRender, I get EXPECTED RESULTS.
Chrome also gives EXPECTED RESULTS.

This was originally reported as https://webcompat.com/issues/56962 (for the blurred top bar at https://goalkicker.com/MySQLBook/ , which is unexpectedly less-blurry at its edges in WebRender-powered Firefox).

Webcompat Priority: --- → ?
Has Regression Range: --- → yes
Has STR: --- → yes
Assignee: nobody → gwatson
Flags: needinfo?(gwatson)

Hi Glenn, can you give a severity rating to this bug? Thank you!

Flags: needinfo?(gwatson)
Severity: -- → S3
Flags: needinfo?(gwatson)
Duplicate of this bug: 1706142

Bug 1706142 has a simpler / more evident test-case.

Webcompat Priority: ? → P3
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