---
title: kCGImageDestinationEncodeGainMapSubsampleFactor
framework: imageio
role: symbol
role_heading: Global Variable
path: imageio/kcgimagedestinationencodegainmapsubsamplefactor
---

# kCGImageDestinationEncodeGainMapSubsampleFactor

## Declaration

```swift
let kCGImageDestinationEncodeGainMapSubsampleFactor: CFString
```