1. Home
  2. Docs
  3. Reference
  4. Package: Pretext.CoreText

Package: Pretext.CoreText

Pretext.CoreText is the first-party macOS-native measurement backend.

Install it when

  • your host runs on macOS and you want CoreText metrics
  • you are building a native AppKit or interop-based host
  • you want Pretext to prefer the macOS-native backend automatically

Runtime behavior

The package advertises CoreTextTextMeasurerFactory to the core engine.

  • Name: CoreText
  • IsSupported: true on macOS
  • Priority: 100

In the native macOS sample host, the app also sets the factory explicitly during startup so the host behavior is obvious and deterministic.

Relationship to the rest of the stack

  • depends on Pretext.Contracts
  • pairs naturally with Pretext and Pretext.Layout
  • is one of the transitive backends included by Pretext.Uno

Typical hosts

  • AppKit hosts on net10.0-macos
  • native macOS drawing surfaces
  • backend-agnostic tools that should use CoreText when running on macOS