---
title: vImage.CompositeMode
framework: accelerate
role: symbol
role_heading: Enumeration
path: accelerate/vimage/compositemode
---

# vImage.CompositeMode

Constants that specify whether the format of layers is premultiplied or nonpremultiplied.

## Declaration

```swift
enum CompositeMode<ComponentType>
```

## Topics

### Enumeration Cases

- [vImage.CompositeMode.nonpremultiplied](accelerate/vimage/compositemode/nonpremultiplied.md)
- [vImage.CompositeMode.nonpremultipliedToPremultiplied](accelerate/vimage/compositemode/nonpremultipliedtopremultiplied.md)
- [vImage.CompositeMode.premultiplied](accelerate/vimage/compositemode/premultiplied.md)
- [vImage.CompositeMode.premultipliedWithConstantAlpha(_:)](accelerate/vimage/compositemode/premultipliedwithconstantalpha(_:).md)

## See Also

### Related Documentation

- [Compositing images with alpha blending](accelerate/compositing-images-with-alpha-blending.md)

### Enumerations

- [vImage.BlendMode](accelerate/vimage/blendmode.md)
- [vImage.BufferType](accelerate/vimage/buffertype.md)
- [vImage.ChannelOrdering](accelerate/vimage/channelordering.md)
- [vImage.EdgeMode](accelerate/vimage/edgemode.md)
- [vImage.Error](accelerate/vimage/error.md)
- [vImage.FloodFillConnectivity](accelerate/vimage/floodfillconnectivity.md)
- [vImage.Gamma](accelerate/vimage/gamma.md)
- [vImage.MorphologyOperation](accelerate/vimage/morphologyoperation.md)
- [vImage.ReflectionAxis](accelerate/vimage/reflectionaxis.md)
- [vImage.Rotation](accelerate/vimage/rotation.md)
- [vImage.ShearDirection](accelerate/vimage/sheardirection.md)