---
title: "vImageConverter_MustOperateOutOfPlace(_:_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vimageconverter_mustoperateoutofplace(_:_:_:_:)"
---

# vImageConverter_MustOperateOutOfPlace(_:_:_:_:)

Determines whether a converter is capable of operating in place.

## Declaration

```swift
func vImageConverter_MustOperateOutOfPlace(_ converter: vImageConverter, _ srcs: UnsafePointer<vImage_Buffer>!, _ dests: UnsafePointer<vImage_Buffer>!, _ flags: vImage_Flags) -> vImage_Error
```

## Parameters

- `converter`: The converter to check to determine if it’s capable of operating in place.
- `srcs`: The list of source buffers you plan to use with doc://com.apple.accelerate/documentation/Accelerate/vImageConvert_AnyToAny(_:_:_:_:_:). This parameter may be NULL.
- `dests`: The list of destination buffers you plan to use with doc://com.apple.accelerate/documentation/Accelerate/vImageConvert_AnyToAny(_:_:_:_:_:). This parameter may be NULL.
- `flags`: The flags you’ll pass to doc://com.apple.accelerate/documentation/Accelerate/vImageConvert_AnyToAny(_:_:_:_:_:).

## Return Value

Return Value kvImageNoError if the conversion will work in place, kvImageOutOfPlaceOperationRequired if the conversion requires out of place operation; otherwise, one of the error codes that Data Types and Constants describes.

## Discussion

Discussion Some conversions work if the source and destination image buffer scanlines start at the same address. Others don’t; for those cases, you need to allocate additional storage to hold the destination buffer. In-place operation is considered to mean srcs[i].data = dests[i].data and srcs[i].rowBytes = dests[i].rowBytes. Other styles of partial buffer overlap produce undefined behavior.

## See Also

### Querying a converter’s properties

- [vImageConverter_GetSourceBufferOrder(_:)](accelerate/vimageconverter_getsourcebufferorder(_:).md)
- [vImageConverter_GetDestinationBufferOrder(_:)](accelerate/vimageconverter_getdestinationbufferorder(_:).md)
- [vImageConverter_GetNumberOfSourceBuffers(_:)](accelerate/vimageconverter_getnumberofsourcebuffers(_:).md)
- [vImageConverter_GetNumberOfDestinationBuffers(_:)](accelerate/vimageconverter_getnumberofdestinationbuffers(_:).md)