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Fix visual artifacts when sometimes using decimal assymetric borderRadii #54237

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Fix visual artifacts when sometimes using decimal assymetric borderRadii #54237

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8 changes: 6 additions & 2 deletions packages/react-native/React/Views/RCTBorderDrawing.m
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Original file line number Diff line number Diff line change
Expand Up @@ -247,8 +247,12 @@ static CGPathRef RCTPathCreateOuterOutline(BOOL drawToEdge, CGRect rect, RCTCorn

const CGSize size = makeStretchable ? (CGSize){
// 1pt for the middle stretchable area along each axis
edgeInsets.left + 1 + edgeInsets.right,
edgeInsets.top + 1 + edgeInsets.bottom
// we also need to round the edge insets to avoid border bleeding
// this is because if the size is decimal, when calculating the unit
// rectangle for CALayer.contentsCenter we encounter rounding errors
// which causes visual glitches
ceil(edgeInsets.left) + 1 + ceil(edgeInsets.right),
ceil(edgeInsets.top) + 1 + ceil(edgeInsets.bottom),
} : viewSize;

UIGraphicsImageRenderer *const imageRenderer =
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