---
title: alphaChannelIsOpaque
framework: corevideo
role: symbol
role_heading: Type Property
path: corevideo/cvimagebufferattachmentkeydefinitions/alphachannelisopaque
---

# alphaChannelIsOpaque

True if the alpha channel in the image data is fully opaque.

## Declaration

```swift
static var alphaChannelIsOpaque: CVAttachmentKeyDefinition<Self.ShouldPropagate, Bool> { get }
```

## Discussion

Discussion This key is not used if the pixel format type has no alpha channel.