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Programming with Quartz by Bunny Laden, David Gelphman

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Chapter 16 Supporting PostScript and EPS Data

The PDF imaging model is, for the most part, a superset of the PostScript imaging model. As a result, a conversion from PostScript data to a PDF document is graphically lossless with very few exceptions and does not require rasterization of the data. The Quartz process for converting PostScript and EPS data into PDF data is similar to that performed by Adobe Distiller and other third-party tools: a PostScript interpreter interprets the PostScript data and converts it to an equivalent PDF representation. This interpreter supports PostScript language level 3 and has many capabilities similar to the basic capabilities present in Adobe Distiller, version 5.0.

The PDF data that results from the Quartz ...

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