---
title: vImage.BlendMode.screen
framework: accelerate
role: symbol
role_heading: Case
path: accelerate/vimage/blendmode/screen
---

# vImage.BlendMode.screen

Sets the destination pixel as the inverted product of the inverted corresponding source pixels.

## Declaration

```swift
case screen
```

## Discussion

Discussion The following image shows the result of compositing using the screen blend mode:

The bottom-right quadrant in the result is identical to the corresponding quadrant in the bottom layer because the operation multiplies each bottom-layer pixel value by 1.0. For example, if the source pixel value is 0.5, the destination pixel value is 0.5: dest = 1 - (1 - 0.5) * (1 - 0.0) // dest = 0.5 The top-right quadrant in the result is brighter than the corresponding quadrant in the bottom layer. In this quadrant, the top-layer and bottom-layer pixel values are identical. For example, if the source pixel value is 0.5, the destination pixel value is 0.75: dest = 1 - (1 - 0.5) * (1 - 0.5) // dest = 0.75

## See Also

### Related Documentation

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

### Enumeration Cases

- [vImage.BlendMode.darken](accelerate/vimage/blendmode/darken.md)
- [vImage.BlendMode.lighten](accelerate/vimage/blendmode/lighten.md)
- [vImage.BlendMode.multiply](accelerate/vimage/blendmode/multiply.md)