---
title: kCVImageBufferDisplayMaskRectangle_ReferenceRasterWidthKey
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebufferdisplaymaskrectangle_referencerasterwidthkey
---

# kCVImageBufferDisplayMaskRectangle_ReferenceRasterWidthKey

Specifies the width in pixels of the 2D coordinate system to define the rectangle.

## Declaration

```swift
let kCVImageBufferDisplayMaskRectangle_ReferenceRasterWidthKey: CFString
```

## Discussion

Discussion The 0,0 origin is the top-left corner. The raster width value is a CFNumber of an unsigned 16-bit integer. The value usually matches the width of the video or the output device.

## 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_RectangleWidthKey](corevideo/kcvimagebufferdisplaymaskrectangle_rectanglewidthkey.md)
- [kCVImageBufferDisplayMaskRectangle_ReferenceRasterHeightKey](corevideo/kcvimagebufferdisplaymaskrectangle_referencerasterheightkey.md)
- [kCVImageBufferDisplayMaskRectangle_RightEdgePointsKey](corevideo/kcvimagebufferdisplaymaskrectangle_rightedgepointskey.md)