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# kCVImageBufferAlphaChannelIsOpaque

A key to indicate whether the alpha channel is fully opaque.

```
let kCVImageBufferAlphaChannelIsOpaque: CFString
```

## Discussion

The value for this key is <doc://com.apple.documentation/documentation/CoreFoundation/kCFBooleanTrue> to indicate that the alpha channel is fully opaque. This key isn’t used if the pixel format type has no alpha channel.

---

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