<!--
{
  "availability" : [
    "iOS: 13.0.0 -",
    "iPadOS: 13.0.0 -",
    "macCatalyst: -",
    "macOS: 10.15.0 -",
    "tvOS: 13.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 6.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "CoreMedia",
  "identifier" : "/documentation/CoreMedia/CMFormatDescription/Extensions-swift.struct/Value/AlphaChannelMode",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Core Media"
    ],
    "preciseIdentifier" : "s:So22CMFormatDescriptionRefa9CoreMediaE10ExtensionsV5ValueV16AlphaChannelModeV"
  },
  "title" : "CMFormatDescription.Extensions.Value.AlphaChannelMode"
}
-->

# CMFormatDescription.Extensions.Value.AlphaChannelMode

```
struct AlphaChannelMode
```

## Topics

### Alpha Channel Modes

[`static let premultipliedAlpha: CMFormatDescription.Extensions.Value.AlphaChannelMode`](/documentation/CoreMedia/CMFormatDescription/Extensions-swift.struct/Value/AlphaChannelMode/premultipliedAlpha)

[`static let straightAlpha: CMFormatDescription.Extensions.Value.AlphaChannelMode`](/documentation/CoreMedia/CMFormatDescription/Extensions-swift.struct/Value/AlphaChannelMode/straightAlpha)

## Relationships

### Conforms To

[`Equatable`](/documentation/Swift/Equatable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)