---
title: baseAddr
framework: Application Services
role: symbol
role_heading: Instance Property
platforms: [macOS 10.0+]
path: applicationservices/pixmap/1459096-baseaddr
---

# baseAddr

For an onscreen pixel image, a pointer to the first byte of the image. For optimal performance, this should be a multiple of 4. The baseAddr field of the PixMap record for an offscreen graphics world contains a handle instead of a pointer. Your application should never directly access the baseAddr field of the PixMap record for an offscreen graphics world.

## Declaration

```swift
var baseAddr: Ptr!
```