# withUnsafePixelBuffers(_:) Calls the given closure with the array of pixel buffers that reference the individual planes. ``` func withUnsafePixelBuffers(_ body: ([vImage.PixelBuffer]) throws -> R) rethrows -> R ``` ## Parameters `body` A closure with an array [`vImage.PixelBuffer`](/documentation/Accelerate/vImage/PixelBuffer) parameter that points to the underlying pixel buffers. ## Return Value The return value, if any, of the body closure parameter. ## Discussion Use this function to access each individual planar pixel buffer of a multiple-plane pixel buffer. For example, the following code initializes a 4-channel interleaved pixel buffer from the first three pixel buffers of a 4-channel multiple-plane pixel buffer: ```swift let src = vImage.PixelBuffer(size: vImage.Size(width: 32, height: 64)) src.withUnsafePixelBuffers { overlaySource8x4PixelBuffers in let dest = vImage.PixelBuffer(planarBuffers: [ overlaySource8x4PixelBuffers[0], overlaySource8x4PixelBuffers[1], overlaySource8x4PixelBuffers[2] ]) } ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)