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

# sourceOverCompositing()

Places one image over a second image.

## Declaration

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

## Mentioned in

Applying a Chroma Key Effect Simulating Scratchy Analog Film

## Return Value

Return Value The modified image.

## Discussion

Discussion This method applies the source-over compositing filter to an image. The effect creates the result by overlaying the input image over the background image. Unlike the other source compositing filters, source-over doesn’t subtract parts of the image. The source-over compositing filter uses the following properties: The following code creates a filter that results in both of the input images becoming visible with no subtraction: func sourceOverCompositing(inputImage: CIImage, backgroundImage: CIImage) -> CIImage {     let colorBlendFilter = CIFilter.sourceOverCompositing()     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)