# floodFill(from:newColor:connectivity:) Applies an in-place flood-fill operation to the 8-bit planar image. ``` func floodFill(from seed: CGPoint, newColor: Pixel_8, connectivity: vImage.FloodFillConnectivity) ``` ## Parameters `seed` The coordinates that define the position of the seed pixel inside the connected component. `newColor` The new pixel value that overwrites the pixels in the connected component. `connectivity` An enumeration that specifies which pixels the operation includes as neighbors. Pass [`vImage.FloodFillConnectivity.edges`](/documentation/Accelerate/vImage/FloodFillConnectivity/edges) to specify a four-connected neighborhood of a pixel that includes the pixels to the left and right, and those above and below. Pass [`vImage.FloodFillConnectivity.edgesAndCorners`](/documentation/Accelerate/vImage/FloodFillConnectivity/edgesAndCorners) to specify an eight-connected neighborhood that includes the four-connected neighborhood and the pixels on the four diagonals. ## Discussion The flood-fill function sets all pixels that are neighboring and identical to the seed pixel to a new color. The operation continues until it reaches the image boundary or until it sets all pixels within the connected component to the new value. The following code applies a flood fill to an 8-bit planar pixel buffer and uses the image’s center pixel as the seed. ```swift // `pixelBuffer` is a `vImage.PixelBuffer`. pixelBuffer.floodFill(from: CGPoint(x: pixelBuffer.width / 2, y: pixelBuffer.height / 2), newColor: fillColor, connectivity: .edgesAndCorners) ``` The image below shows the original line-art image on the left, and the flood-filled image on the right:  ## 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)