Display PostScript: Difference between revisions

Revision as of 08:08, 26 July 2002

Revision as of 08:14, 26 July 2002

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On the NeXT system a completely new windowing engine was written, to take full advantage of their [[object oriented]] [[operating system]]. The windowing system itself used PostScript to draw items like titlebars and scrollers. This, in turn, made extensive use of pswraps, which were in turn wrapped in objects and presented to the programmer in object form.

[[Apple Computer|Apple]]'s [[Mac OS X]] operating system now makes use of a similar imaging model to Display PostScript, but does not have the same level of programmability. It is not entirely clear why this happened, but speculation suggests that Adobe was asking for a high licencing fee. The new system, known as Quartz, is based on the PDF model in which the source of the image is not the PostScript code itself, but the result of interpreting that code. It keeps the basic graphics primatives, font handling and measurements, and in many cases looks and feels like DPS. It is not entirely clear why this happened, but speculation suggests that Adobe was asking for a high licencing fee.

See also: