---
title: "init(axialHeadroom:space:start:end:function:extendStart:extendEnd:)"
framework: coregraphics
role: symbol
role_heading: Initializer
path: "coregraphics/cgshading/init(axialheadroom:space:start:end:function:extendstart:extendend:)"
---

# init(axialHeadroom:space:start:end:function:extendStart:extendEnd:)

## Declaration

```swift
init?(axialHeadroom headroom: Float, space: CGColorSpace, start: CGPoint, end: CGPoint, function: CGFunction, extendStart: Bool, extendEnd: Bool)
```