---
title: kCVImageBufferDisplayMaskRectangle_LeftEdgePointsKey
framework: corevideo
role: symbol
role_heading: Global Variable
path: corevideo/kcvimagebufferdisplaymaskrectangle_leftedgepointskey
---

# kCVImageBufferDisplayMaskRectangle_LeftEdgePointsKey

Specifies inset points on the left vertical edge of the rectangle.

## Declaration

```swift
let kCVImageBufferDisplayMaskRectangle_LeftEdgePointsKey: CFString
```

## Discussion

Discussion The points are CFNumber of unsigned 16-bit integer CFArray pairs alternating between inset X and inset Y. Inset X is an unsigned offset from the left edge (0) toward the right edge (width). Inset Y is an unsigned offset from the top edge (0) toward the bottom edge (height).

## See Also

### Constants

- [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_ReferenceRasterWidthKey](corevideo/kcvimagebufferdisplaymaskrectangle_referencerasterwidthkey.md)
- [kCVImageBufferDisplayMaskRectangle_RightEdgePointsKey](corevideo/kcvimagebufferdisplaymaskrectangle_rightedgepointskey.md)