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Fix rounded border drawing when border-radius is smaller than border-width #28358

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Fix rounded border drawing when border-radius is smaller than border-width #28358

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49 changes: 45 additions & 4 deletions RNTester/js/examples/View/ViewExample.js
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Original file line number Diff line number Diff line change
Expand Up @@ -148,12 +148,53 @@ exports.examples = [
},
},
{
title: 'Circle with Border Radius',
title: 'Rounded Borders',
render(): React.Node {
return (
<View
style={{borderRadius: 10, borderWidth: 1, width: 20, height: 20}}
/>
<View style={{flexDirection: 'row'}}>
<View
style={{
width: 50,
height: 50,
borderRadius: 25,
borderWidth: 1,
marginRight: 10,
}}
/>
<View
style={{
width: 50,
height: 50,
borderRadius: 25,
borderWidth: 10,
marginRight: 10,
}}
/>
<View
style={{
width: 50,
height: 50,
borderTopLeftRadius: 5,
borderTopRightRadius: 10,
borderBottomRightRadius: 25,
borderBottomLeftRadius: 50,
borderWidth: 1,
marginRight: 10,
}}
/>
<View
style={{
width: 50,
height: 50,
borderTopLeftRadius: 5,
borderTopRightRadius: 10,
borderBottomRightRadius: 25,
borderBottomLeftRadius: 50,
borderWidth: 10,
marginRight: 10,
}}
/>
</View>
);
},
},
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34 changes: 21 additions & 13 deletions ReactAndroid/src/main/java/com/facebook/react/views/view/ReactViewBackgroundDrawable.java
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Original file line number Diff line number Diff line change
Expand Up @@ -526,18 +526,18 @@ private void updatePath() {
mTempRectForBorderRadiusOutline.set(getBounds());
mTempRectForCenterDrawPath.set(getBounds());

float fullBorderWidth = getFullBorderWidth();
if (fullBorderWidth > 0) {
mTempRectForCenterDrawPath.inset(fullBorderWidth * 0.5f, fullBorderWidth * 0.5f);
}

final RectF borderWidth = getDirectionAwareBorderInsets();

mInnerClipTempRectForBorderRadius.top += borderWidth.top;
mInnerClipTempRectForBorderRadius.bottom -= borderWidth.bottom;
mInnerClipTempRectForBorderRadius.left += borderWidth.left;
mInnerClipTempRectForBorderRadius.right -= borderWidth.right;

mTempRectForCenterDrawPath.top += borderWidth.top * 0.5f;
mTempRectForCenterDrawPath.bottom -= borderWidth.bottom * 0.5f;
mTempRectForCenterDrawPath.left += borderWidth.left * 0.5f;
mTempRectForCenterDrawPath.right -= borderWidth.right * 0.5f;

final float borderRadius = getFullBorderRadius();
float topLeftRadius = getBorderRadiusOrDefaultTo(borderRadius, BorderRadiusLocation.TOP_LEFT);
float topRightRadius = getBorderRadiusOrDefaultTo(borderRadius, BorderRadiusLocation.TOP_RIGHT);
Expand Down Expand Up @@ -663,14 +663,22 @@ private void updatePath() {
mCenterDrawPath.addRoundRect(
mTempRectForCenterDrawPath,
new float[] {
innerTopLeftRadiusX + (topLeftRadius > 0 ? extraRadiusForOutline : 0),
innerTopLeftRadiusY + (topLeftRadius > 0 ? extraRadiusForOutline : 0),
innerTopRightRadiusX + (topRightRadius > 0 ? extraRadiusForOutline : 0),
innerTopRightRadiusY + (topRightRadius > 0 ? extraRadiusForOutline : 0),
innerBottomRightRadiusX + (bottomRightRadius > 0 ? extraRadiusForOutline : 0),
innerBottomRightRadiusY + (bottomRightRadius > 0 ? extraRadiusForOutline : 0),
innerBottomLeftRadiusX + (bottomLeftRadius > 0 ? extraRadiusForOutline : 0),
innerBottomLeftRadiusY + (bottomLeftRadius > 0 ? extraRadiusForOutline : 0)
Math.max(topLeftRadius - borderWidth.left * 0.5f,
(borderWidth.left > 0.0f) ? (topLeftRadius / borderWidth.left) : 0.0f),
Math.max(topLeftRadius - borderWidth.top * 0.5f,
(borderWidth.top > 0.0f) ? (topLeftRadius / borderWidth.top) : 0.0f),
Math.max(topRightRadius - borderWidth.right * 0.5f,
(borderWidth.right > 0.0f) ? (topRightRadius / borderWidth.right) : 0.0f),
Math.max(topRightRadius - borderWidth.top * 0.5f,
(borderWidth.top > 0.0f) ? (topRightRadius / borderWidth.top) : 0.0f),
Math.max(bottomRightRadius - borderWidth.right * 0.5f,
(borderWidth.right > 0.0f) ? (bottomRightRadius / borderWidth.right) : 0.0f),
Math.max(bottomRightRadius - borderWidth.bottom * 0.5f,
(borderWidth.bottom > 0.0f) ? (bottomRightRadius / borderWidth.bottom) : 0.0f),
Math.max(bottomLeftRadius - borderWidth.left * 0.5f,
(borderWidth.left > 0.0f) ? (bottomLeftRadius / borderWidth.left) : 0.0f),
Math.max(bottomLeftRadius - borderWidth.bottom * 0.5f,
(borderWidth.bottom > 0.0f) ? (bottomLeftRadius / borderWidth.bottom) : 0.0f)
},
Path.Direction.CW);

Expand Down