Encapsulated PostScript
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An Encapsulated PostScript file (EPS ) file is a graphic file in the PostScript page description language, which meets special requirements in order to allow the integration into a document. In particular, EPS always describes as opposed to general PostScript only one page. The format was created in 1987 by Adobe released together with Aldus, the former manufacturer of PageMaker, and Altsys, the developed vector graphics and font editors.
An EPS file contains object, raster graphics and data separation. Also fonts can be embedded. Since import applications do not need to have a PostScript interpreter, a file included optionally also a preview in a lower resolution (see preview ), which can serve as a placeholder in the screen view.
Encapsulated PostScript was developed because it is difficult to embed any available in postscript format graphics into other PostScript files. Even the determination of height and width of a PostScript graphic is not readily possible. Therefore EPS files contain information about the so-called Bounding Box. The bounding box is the smallest rectangle that can draw a printable object. Since it is possible that the embedded code has undesirable effects on the interpretation of the code of the embedding document, additional rules must be adhered to. An EPS graphic must leave, for example, according to their interpretation of the operand stack in its original condition and must not use any commands or other program structures, the global effect on the entire document containing the EPS file. Thus, for example, the use of ErasePage operator that changes the contents of an entire page (and thus also the area outside the EPS graphic ) deletes not allowed.
EPS files can be viewed, for example, Ghostscript on screen or converted for printing on a non- postscript printer. The file extensions for EPS are. Eps and rare. Epsf. The latter is the abbreviation for " Encapsulated PostScript File ".