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NEWS is unrelated and is part of the see-also |
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The developers of [[NeXT]] wrote a completely new windowing engine to take full advantage of NeXT's [[object-oriented operating system]]. A number of commands were added to DPS to actually create the windows and to react to events, similar to but simpler than [[NeWS]]. The single API made programming at higher levels much easier and made NeXT one of the few systems to extensively use DPS. The user-space windowing system library [[Nextstep]] used PostScript to draw items like titlebars and scrollers. This, in turn, made extensive use of <code>pswrap</code>s, which were in turn wrapped in objects and presented to the programmer in object form.
== Modern
[[Apple Computer|Apple]]'s [[Mac OS X]] operating system uses a central window server (created entirely by Apple) that caches window graphics as [[Portable Document Format|PDF]], instead of storing and executing PostScript code. A graphics library called [[Quartz 2D]] provides PostScript-style imaging using the PDF rendering model (a subset, plus tweaks, of the PostScript model), but this is used by application frameworks—there is no PostScript present in the Mac OS X window server. Apple chose to use this model for a variety of reasons, including the avoidance of high Adobe-imposed licensing fees for DPS, and more efficient support of legacy [[Carbon (API)|Carbon]] and [[Classic (Mac OS X)|Classic]] code; [[QuickDraw]]-based applications use bitmapped drawing exclusively. Adobe's copyright stipulations for the PDF standard are much less restrictive, granting conditional copyright permission to anyone to use the format in software applications, free of charge.
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