---
title: IOSurfaceSubsampling.subsamplingUnknown
framework: IOSurface
role: symbol
role_heading: Case
platforms: [iOS 11.0+, iPadOS 11.0+, Mac Catalyst 13.0+, macOS 10.6+, tvOS 11.0+, visionOS 1.0+]
path: iosurface/iosurfacesubsampling/subsamplingunknown
---

# IOSurfaceSubsampling.subsamplingUnknown

## Declaration

```swift
case subsamplingUnknown
```

## See Also

### Enumeration Cases

- [IOSurfaceSubsampling.subsampling411](iosurface/iosurfacesubsampling/subsampling411.md)
- [IOSurfaceSubsampling.subsampling420](iosurface/iosurfacesubsampling/subsampling420.md)
- [IOSurfaceSubsampling.subsampling422](iosurface/iosurfacesubsampling/subsampling422.md)
- [IOSurfaceSubsampling.subsamplingNone](iosurface/iosurfacesubsampling/subsamplingnone.md)