A PostScript drawing looks much better when printed on a 600- dpiprinter than on a 300-dpi printer. The principal advantage of object-oriented ( vector) graphics over bit-mapped graphics is that object-oriented images take advantage of high-resolution output devices whereas bit-mapped images do not. To print a bit-mapped typeface with different sizes, these printers require a complete set of bit maps for each size. In contrast, many non-PostScript printers represent fonts with bit maps. Given a single typeface definition, a PostScript printer can thus produce a multitude of fonts. They are also called scalable fonts because their size can be changed with PostScript commands. PostScript fonts are called outline fonts because the outline of each character is defined. PostScript is an object-oriented language, meaning that it treats images, including fonts, as collections of geometrical objects rather than as bit maps. PostScript is an Object-Oriented Language PostScript is the standard for desktop publishing because it is supported by imagesetters, the very high-resolution printers used by service bureaus to produce camera-ready copy. It is primarily a language for printing documents on laser printers, but it can be adapted to produce images on other types of devices. PostScript is a page description language (PDL) developed by Adobe Systems.
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