Linotype Font Technology – PostScript and TrueType

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PostScript and TrueType

PostScript Type 1 fonts can also be called outline fonts. They are a special form of the PostScript programming language, themselves building programs of their own, namely the font software. A font in the PostScript language contains an organized collection of procedures to describe the glyph forms. See the PostScript Language Reference Manual for more detailed information. Different font programs contain different amounts of information, gathered together in the so-called ?dictionary?. The dictionary saves the obligatory and optional entries and serves the PostScript interpreter as a data object in order to access all font functions.

The TrueType technology is made up of two components: fonts in TrueType font format and the TrueType rasterizer. Both are necessary to display and print TrueType fonts on computer systems. TrueType is compatible with both Apple and Windows systems, however, a separate TrueType font file must be created for each operating system.

2. If the outline falls exactly on the middle of a pixel, the pixel will be turned on.

So which of the two font formats is “better”? The answer is anything but simple and must be seen from a variety of angles. Both formats, TrueType and Type1, consist of algorithms or instructions with which an outline font can be rasterized in pixels for display. The main differences between the two formats are of technical and philosophical nature, as well as dependent upon various corporate policies.

This Font Technology Feature is an excerpt from:

Ivir, Milo. ’Entwicklung digitaler Schrifttechnologien und ihre Einflußnahme auf die Typografie im Zeitalter des elektronischen Publizierens’ (The Development of Digital Font Technologies and their influence on Typography in the Age of Electronic Publishing). Diploma thesis, Institute for Technology and Print Planning, College of Art, Berlin, 1998.

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