Apple Type Services for Unicode Imaging

Apple Type Services for Unicode Imaging (ATSUI) was a framework for developed by Apple for rendering Unicode-encoded text in Mac OS 8.5 through early versions of Mac OS X.
==History==
In 1998, Mac OS 8.5 introduced support for Unicode through ATSUI 1.0, which initially operated alongside the older WorldScript text engine. In 1999, Mac OS 8.6 updated ATSUI to version 1.1.Mac OS 8.5, 8.5.1, 8.6 and Developers, Apple Developer. Archived 1999-10-09. With the transition to Mac OS X, WorldScript was phased out in favor of ATSUI with its Unicode support.Overview of ATSUI, Apple Developer Connection. Archived 2003-09-18.
===Deprecation===
As ATSUI itself was based on the transitional Carbon API, it also started being phased out in favor of Core Text with the release of Mac OS X 10.5 "Leopard" in October 2007.Mac OS X 10.5 Leopard: the Ars Technica review, by John Siracusa, Ars Technica. 2007-10-28. The framework was officially deprecated with the release of Xcode 4.6 in December 2012: "Source code using ATS APIs will generate warnings while being compiled. For 10.8, there will be no loss of functionality but there could be areas where performance will suffer. Programmers are instructed to replace all their ATS code (including ATSUI) with CoreText as ATS functionality will be completely removed in future releases of OS X."
==References==
==See also==
*Cocoa Text System, for OS X applications in which users need to enter and edit text.
==External links==
*Apple Type Services for Unicode Imaging at Apple Developer Connection (archived 2001-11-09, mirrored)
**Font Services in Mac OS X (2003-01-24, archived 2004-10-15, mirrored)
**Introduction to Apple Type Services for Unicode Imaging (2002-12-02, archived 2003-08-17)
***ATSUI Attribute Selectors
***ATSUI Version Selectors
***Technical Note 2033: How to use the ATSUI Low Level APIs to get glyph outlines (2001-11-26, archived 2002-02-11)
*Using Unicode fonts with Mac OS X by Prof. Robert Zydenbos (2010-02-02)
* at Wikipedia
===Articles===
*A look at OS X’s font capabilities at Macworld (2001-10-11)
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Category:Discontinued Apple software
Category:Classic Mac OS
Category:Mac OS X
Category:Localization
Category:Unicode
Category:1998 introductions