---
title: kCVImageBufferDisplayMaskRectangle_RectangleWidthKey
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebufferdisplaymaskrectangle_rectanglewidthkey
---

# kCVImageBufferDisplayMaskRectangle_RectangleWidthKey

Specifies the width of the rectangle starting at the rectangle’s left offset toward the rectangle’s right edge.

## Declaration

```swift
let kCVImageBufferDisplayMaskRectangle_RectangleWidthKey: CFString
```

## Discussion

Discussion The width value is a CFNumber of an unsigned 16-bit integer.

## See Also

### Constants

- [kCVImageBufferDisplayMaskRectangle_LeftEdgePointsKey](corevideo/kcvimagebufferdisplaymaskrectangle_leftedgepointskey.md)
- [kCVImageBufferDisplayMaskRectangle_RectangleHeightKey](corevideo/kcvimagebufferdisplaymaskrectangle_rectangleheightkey.md)
- [kCVImageBufferDisplayMaskRectangle_RectangleLeftKey](corevideo/kcvimagebufferdisplaymaskrectangle_rectangleleftkey.md)
- [kCVImageBufferDisplayMaskRectangle_RectangleTopKey](corevideo/kcvimagebufferdisplaymaskrectangle_rectangletopkey.md)
- [kCVImageBufferDisplayMaskRectangle_ReferenceRasterHeightKey](corevideo/kcvimagebufferdisplaymaskrectangle_referencerasterheightkey.md)
- [kCVImageBufferDisplayMaskRectangle_ReferenceRasterWidthKey](corevideo/kcvimagebufferdisplaymaskrectangle_referencerasterwidthkey.md)
- [kCVImageBufferDisplayMaskRectangle_RightEdgePointsKey](corevideo/kcvimagebufferdisplaymaskrectangle_rightedgepointskey.md)