---
title: Image I/O Functions
framework: imageio
role: collectionGroup
role_heading: API Collection
path: imageio/image-i-o-functions
---

# Image I/O Functions

## Topics

### Functions

- [CGImageDestinationAddImageAndMetadata(_:_:_:_:)](imageio/cgimagedestinationaddimageandmetadata(_:_:_:_:).md)
- [CGImageDestinationCopyImageSource(_:_:_:_:)](imageio/cgimagedestinationcopyimagesource(_:_:_:_:).md)
- [CGImageSourceCopyMetadataAtIndex(_:_:_:)](imageio/cgimagesourcecopymetadataatindex(_:_:_:).md)
- [CGImageSourceRemoveCacheAtIndex(_:_:)](imageio/cgimagesourceremovecacheatindex(_:_:).md)
- [CGImageSourceSetAllowableTypes(_:)](imageio/cgimagesourcesetallowabletypes(_:).md)

## See Also

### Reference

- [Image I/O Constants](imageio/image-i-o-constants.md)
- [Image I/O Macros](imageio/image-i-o-macros.md)