# CTRunGetTypographicBounds(_:_:_:_:_:) Gets the typographic bounds of the run. ``` func CTRunGetTypographicBounds(_ run: CTRun, _ range: CFRange, _ ascent: UnsafeMutablePointer?, _ descent: UnsafeMutablePointer?, _ leading: UnsafeMutablePointer?) -> Double ``` ## Parameters `run` The run for which to calculate the typographic bounds. `range` The portion of the run to measure. If the length of the range is set to `0`, then the measure operation continues from the range’s start index to the end of the run. `ascent` On output, the ascent of the run. This can be set to `NULL` if not needed. `descent` On output, the descent of the run. This can be set to `NULL` if not needed. `leading` On output, the leading of the run. This can be set to `NULL` if not needed. ## Return Value The typographic width of the run, or if `run` or `range` is invalid, `0`. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)