---
title: kCGImageDestinationEncodeGenerateGainMapWithBaseImage
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagedestinationencodegenerategainmapwithbaseimage
---

# kCGImageDestinationEncodeGenerateGainMapWithBaseImage

## Declaration

```swift
let kCGImageDestinationEncodeGenerateGainMapWithBaseImage: CFString
```