---
title: CGFunctionCallbacks
framework: coregraphics
role: symbol
role_heading: Structure
path: coregraphics/cgfunctioncallbacks
---

# CGFunctionCallbacks

A structure that contains callbacks needed by a CGFunctionRef object.

## Declaration

```swift
struct CGFunctionCallbacks
```

## Topics

### Initializers

- [init()](coregraphics/cgfunctioncallbacks/init().md)
- [init(version:evaluate:releaseInfo:)](coregraphics/cgfunctioncallbacks/init(version:evaluate:releaseinfo:).md)

### Instance Properties

- [evaluate](coregraphics/cgfunctioncallbacks/evaluate.md)
- [releaseInfo](coregraphics/cgfunctioncallbacks/releaseinfo.md)
- [version](coregraphics/cgfunctioncallbacks/version.md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Sendable](swift/sendable.md)

## See Also

### Callbacks

- [CGFunctionEvaluateCallback](coregraphics/cgfunctionevaluatecallback.md)
- [CGFunctionReleaseInfoCallback](coregraphics/cgfunctionreleaseinfocallback.md)