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Typography Concepts

This chapter introduces and defines important typographic terms related to text—traditionally defined as the written representation of spoken language. The terms and concepts discussed in this chapter are used throughout the rest of the book and in ATSUI Reference. If you plan to use ATSUI, or any API that uses ATSUI (for example, MLTE), you should read this chapter.

This chapter starts by outlining the different components that make up text. It then describes how text is

• measured and stored

• arranged on a display device

• adjusted in various ways to affect the text direction, kerning, alignment (or flushness), justification, and line breaks

• drawn, highlighted, and hit-tested

Contents:

Characters, Glyphs, and Fonts
Character Encoding and Glyph Codes
Unicode
Text Storage
Text Measurements
Typestyles
Text Layout
Caret Handling

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