---
title: "vImagePermuteChannels_ARGBFFFF(_:_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vimagepermutechannels_argbffff(_:_:_:_:)"
---

# vImagePermuteChannels_ARGBFFFF(_:_:_:_:)

Permutes the channels of a floating-point 32-bit-per-channel, 4-channel interleaved buffer.

## Declaration

```swift
func vImagePermuteChannels_ARGBFFFF(_ src: UnsafePointer<vImage_Buffer>, _ dest: UnsafePointer<vImage_Buffer>, _ permuteMap: UnsafePointer<UInt8>, _ flags: vImage_Flags) -> vImage_Error
```

## Parameters

- `src`: The source vImage buffer.
- `dest`: A pointer to the destination vImage buffer structure. You’re responsible for filling out the doc://com.apple.accelerate/documentation/Accelerate/vImage_Buffer/height, doc://com.apple.accelerate/documentation/Accelerate/vImage_Buffer/width, and doc://com.apple.accelerate/documentation/Accelerate/vImage_Buffer/rowBytes fields of this structure, and for allocating a data buffer of the appropriate size. On return, the data buffer this structure points to contains the destination image data. When you no longer need the data buffer, deallocate the memory to prevent memory leaks.
- `permuteMap`: An array of four 8-bit integers with the values 0, 1, 2, and 3, in some order. Each value specifies the channel from the source image that the function copies to the destination channel at the corresponding index.
- `flags`: The options to use when performing the operation. If your code implements its own tiling or its own multithreading, pass doc://com.apple.accelerate/documentation/Accelerate/kvImageDoNotTile; otherwise, pass doc://com.apple.accelerate/documentation/Accelerate/kvImageNoFlags.

## Return Value

Return Value kvImageNoError; otherwise, one of the error codes in Data Types and Constants.

## Discussion

Discussion The following code reverses the channel ordering of a pixel buffer: let pixelBuffer = vImage.PixelBuffer<vImage.InterleavedFx4>(     pixelValues: [10, 20, 30, 40],     size: .init(width: 1, height: 1))

pixelBuffer.withUnsafePointerToVImageBuffer { buf in     _ = vImagePermuteChannels_ARGBFFFF(buf,                                       buf,                                       [3, 2, 1, 0],                                       vImage_Flags(kvImageNoFlags)) }

// Prints "[40, 30, 20, 10]". print(pixelBuffer.array)

## See Also

### Permuting channels

- [vImagePermuteChannels_RGB888(_:_:_:_:)](accelerate/vimagepermutechannels_rgb888(_:_:_:_:).md)
- [vImagePermuteChannels_ARGB8888(_:_:_:_:)](accelerate/vimagepermutechannels_argb8888(_:_:_:_:).md)
- [vImagePermuteChannels_ARGB16U(_:_:_:_:)](accelerate/vimagepermutechannels_argb16u(_:_:_:_:).md)
- [vImagePermuteChannels_ARGB16F(_:_:_:_:)](accelerate/vimagepermutechannels_argb16f(_:_:_:_:).md)