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# roundedRectangleStrokeGenerator()

Creates an image containing the outline of a rounded rectangle.

```
class func roundedRectangleStrokeGenerator() -> any CIFilter & CIRoundedRectangleStrokeGenerator
```

## Return Value

A [`CIImage`](/documentation/CoreImage/CIImage) containing the stroked rectangle.

## Discussion

This filter creates an outline of a rounded rectangle.

The filter takes the following properties:

- `extent`: A <doc://com.apple.documentation/documentation/CoreFoundation/CGRect> containing the position and size of the rectangle.
- `width`: The width of the stroke to draw.
- `radius`: The corner radius.

The following code generates an image containing a stroked rounded rectangle:

```swift
func roundedRectangleStroke() -> CIImage {
    let filter = CIFilter.roundedRectangleStrokeGenerator()
    filter.extent = CGRect(x: 0, y: 0, width: 200, height: 100)
    filter.color = CIColor.red
    filter.width = 5
    filter.radius = 20
    return filter.outputImage!
}
```

![An image containing an outlined rectangle with rounded corners.](images/com.apple.coreimage/media-4407287@2x.png)

---

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