Implements`ClipRSuperellipse` on backdrop filter on platform view#182643

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Hari-07 wants to merge 4 commits intoflutter:masterfrom

Hari-07:backdrop-clip-rse

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Implements`ClipRSuperellipse` on backdrop filter on platform view#182643
Hari-07 wants to merge 4 commits intoflutter:masterfrom
Hari-07:backdrop-clip-rse

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Hari-07 commentedFeb 19, 2026

ImplementsClipRSuperellipse on backdrop filter on platform view

List which issues are fixed by this PR. You must list at least one issue. An issue is not required if the PR fixes something trivial like a typo.
Fixes#179125

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I read theContributor Guide and followed the process outlined there for submitting PRs.
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I listed at least one issue that this PR fixes in the description above.
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Hari-07 added2 commits

February 20, 2026 02:30

Implement RSE backdrop clip

eb9cc03

Add test

e943955

Hari-07 requested a review froma team as acode owner

February 19, 2026 21:56

github-actionsbot added platform-ios

iOS applications specifically

engine

flutter/engine related. See also e: labels.

team-iosOwned by iOS platform team labels

Feb 19, 2026

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Feb 19, 2026

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Code Review

The pull request correctly implements support forClipRSuperellipse on backdrop filters for platform views on iOS by utilizing thecornerCurve property ofCALayer. This is a valuable addition for achieving high-fidelity UI effects. However, there are two important issues to address: thecornerCurve property is only available on iOS 13.0 and later, so an availability check is required to prevent crashes on older supported iOS versions (like iOS 12). Additionally, becauseUIVisualEffectView instances are reused withinChildClippingView, thecornerCurve property must be explicitly reset tokCACornerCurveCircular when the clip is not a superellipse to avoid leaking the continuous curve state from previous frames. The review follows the Flutter Style Guide, focusing on correctness and platform compatibility.