---
title: "vImageCopyBuffer(_:_:_:_:)"
framework: accelerate
role: symbol
role_heading: Function
path: "accelerate/vimagecopybuffer(_:_:_:_:)"
---

# vImageCopyBuffer(_:_:_:_:)

Copies the contents of a vImage buffer to a destination buffer.

## Declaration

```swift
func vImageCopyBuffer(_ src: UnsafePointer<vImage_Buffer>, _ dest: UnsafePointer<vImage_Buffer>, _ pixelSize: Int, _ 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 height, width, and 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.
- `pixelSize`: The number of bytes for one pixel.
- `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.