---
title: "hlg(ambientViewingEnvironment:)"
framework: quartzcore
role: symbol
role_heading: Type Method
path: "quartzcore/caedrmetadata/hlg(ambientviewingenvironment:)"
---

# hlg(ambientViewingEnvironment:)

## Declaration

```swift
class func hlg(ambientViewingEnvironment data: Data) -> CAEDRMetadata
```