Font Coverage in Windows

Bob Rasmussen - Rasmussen Software, Inc.

Intended Audience: Software Engineer
Session Level: Advanced

One of the difficulties in dealing with multilingual data has been determining whether a font contains glyphs for particular characters. This presentation describes a method for doing so, with focus on the Windows environment. Techniques to be covered include:

* Determining whether a character is in a TrueType font.
* Locating, reading, and using the CMAP table.
* Options for dealing with missing characters.
* Decomposing characters.
* Dynamic display of combining diacritics.
* Finding fonts with appropriate coverage.

These techniques when used together result in a display module with the ability to display a wide variety of Unicode characters, without operator intervention.

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16 Jun 2000, Webmaster