# transform(_:backgroundColor:destination:) Applies a Core Graphics affine transformation to a floating-point 32-bit-per-channel, four-channel interleaved pixel buffer. ``` func transform(_ transform: CGAffineTransform, backgroundColor: Pixel_FFFF? = (0, 0, 0, 0), destination: vImage.PixelBuffer) ``` ## Parameters `transform` The affine transformation matrix. `backgroundColor` An optional background color. If you pass `nil`, the operation uses the [`kvImageEdgeExtend`](/documentation/Accelerate/kvImageEdgeExtend) flag to extend the edges of the image infinitely. `destination` The destination pixel buffer. ## See Also --- 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)