TrueType

A method for displaying typefaces on computer screens and other output devices developed by Apple and is used on Macintosh computers and in the Windows operating system. It is based on scalable typefaces defined by curves and a program known as a rasterizer that produces the characters as a screened image in the desired size and in accordance with the resolution of the output device. The curves are defined mathematically with the help of quadratic B-splines. Specific hints are used to compensate for the inadequacies of the display due to the limited resolution of the respective output device. In addition to TrueType, there is also a second, similar method known as Type 1 fonts. In this case, more complex, cubic B?zier polynomials are used to define the characters and the hints are less detailed than in TrueType. Type 1 is also part of the PostScript system for defining the graphic layout of documents and is thus dominant in the prepress field. A convergence between TrueType and Type 1 has recently been apparent. For example, the new Version 3 of the PostScript system also supports the TrueType technology as a standard feature.

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