---
title: sourceOutCompositing()
framework: coreimage
role: symbol
role_heading: Type Method
path: coreimage/cifilter-swift.class/sourceoutcompositing()
---

# sourceOutCompositing()

Subtracts overlapping area of two images to create the output image.

## Declaration

```swift
class func sourceOutCompositing() -> any CIFilter & CICompositeOperation
```

## Return Value

Return Value The modified image.

## Discussion

Discussion This method applies the source-out compositing filter to an image. The effect creates the result by overlaying the input image over the background image. The filter then removes the overlapping area of the background image from the result. The source-out compositing filter uses the following properties: The following code creates a filter that results in an output image that shows the portion of the background image that doesn’t overlap with the input image: func sourceOutCompositing(inputImage: CIImage, backgroundImage: CIImage) -> CIImage {     let colorBlendFilter = CIFilter.sourceOutCompositing()     colorBlendFilter.inputImage = inputImage     colorBlendFilter.backgroundImage = backgroundImage     return colorBlendFilter.outputImage! }

## See Also

### Filters

- [additionCompositing()](coreimage/cifilter-swift.class/additioncompositing().md)
- [colorBlendMode()](coreimage/cifilter-swift.class/colorblendmode().md)
- [colorBurnBlendMode()](coreimage/cifilter-swift.class/colorburnblendmode().md)
- [colorDodgeBlendMode()](coreimage/cifilter-swift.class/colordodgeblendmode().md)
- [darkenBlendMode()](coreimage/cifilter-swift.class/darkenblendmode().md)
- [differenceBlendMode()](coreimage/cifilter-swift.class/differenceblendmode().md)
- [divideBlendMode()](coreimage/cifilter-swift.class/divideblendmode().md)
- [exclusionBlendMode()](coreimage/cifilter-swift.class/exclusionblendmode().md)
- [hardLightBlendMode()](coreimage/cifilter-swift.class/hardlightblendmode().md)
- [hueBlendMode()](coreimage/cifilter-swift.class/hueblendmode().md)
- [lightenBlendMode()](coreimage/cifilter-swift.class/lightenblendmode().md)
- [linearBurnBlendMode()](coreimage/cifilter-swift.class/linearburnblendmode().md)
- [linearDodgeBlendMode()](coreimage/cifilter-swift.class/lineardodgeblendmode().md)
- [linearLightBlendMode()](coreimage/cifilter-swift.class/linearlightblendmode().md)
- [luminosityBlendMode()](coreimage/cifilter-swift.class/luminosityblendmode().md)