10.12.2018

A First Guide To Postscript Pdf

A First Guide To Postscript Pdf Average ratng: 3,8/5 7316 reviews

PostScript vs. PDF, Adobe, archived from the original on 2016-04-13 (NB. Official introductory comparison of PS, EPS vs. PDF.) A First Guide to PostScript, Tail recursive; Casselman, William ‘Bill’. Mathematical Illustrations: A Manual of Geometry and PostScript (PDF). Reid, Glenn (1990).

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Guide

Contents • • • • • • • • • • • • • • • • • • History [ ] The concepts of the PostScript language were seeded in 1966 when was working at, a company. At that time John Warnock was developing an interpreter for a large three-dimensional graphics database of. Warnock conceived the Design System language to process the graphics. Concurrently, researchers at had developed the first and had recognized the need for a standard means of defining page images. In 1975-76 and developed the Press format, which was eventually used in the system to drive laser printers. But Press, a data format rather than a language, lacked flexibility, and PARC mounted the effort to create a successor.

In 1978 Warnock left Evans & Sutherland and joined Xerox PARC to work with. They rewrote Design System to create the interpretive language, J & M or JaM (for 'John and Martin') which was used for design and the investigation of type and graphics printing. This work later evolved and expanded into the Interpress language. Warnock left with and founded in December 1982. They, together with Doug Brotz, Ed Taft and created a simpler language, similar to Interpress, called PostScript, which went on the market in 1984. At about this time they were visited by, who urged them to adapt PostScript to be used as the language for driving laser printers.

In March 1985, the was the first printer to ship with PostScript, sparking the (DTP) revolution in the mid-1980s. The combination of technical merits and widespread availability made PostScript a language of choice for graphical output for printing applications. For a time an (sometimes referred to as a for Raster Image Processor) for the PostScript language was a common component of laser printers, into the 1990s. However, the cost of implementation was high; computers output raw PS code that would be interpreted by the printer into a raster image at the printer's natural resolution. This required high performance and ample.

The LaserWriter used a 12 MHz, making it faster than any of the Macintosh computers to which it attached. When the laser printer engines themselves cost over a thousand dollars the added cost of PS was marginal. But as printer mechanisms fell in price, the cost of implementing PS became too great a fraction of overall printer cost; in addition, with desktop computers becoming more powerful, it no longer made sense to offload the rasterisation work onto the resource-constrained printer. By 2001, few lower-end printer models came with support for PostScript, largely due to growing competition from much cheaper non-PostScript ink jet printers, and new software-based methods to render PostScript images on the computer, making them suitable for any printer;, a descendant of PostScript, provides one such method, and has largely replaced PostScript as standard for electronic document distribution. On high-end printers, PostScript processors remain common, and their use can dramatically reduce the CPU work involved in printing documents, transferring the work of rendering PostScript images from the computer to the printer. PostScript Level 1 [ ] The first version of the PostScript language was released to the market in 1984. The suffix Level 1 was added when Level 2 was introduced.

PostScript Level 2 [ ] PostScript Level 2 was introduced in 1991, and included several improvements: improved speed and reliability, support for in-RIP separations, (for example, images could be rendered by a PostScript program), support for composite, and the form mechanism for caching reusable content. PostScript 3 [ ] PostScript 3 (Adobe dropped the 'level' terminology in favor of simple versioning) came at the end of 1997, and along with many new dictionary-based versions of older operators, introduced better color handling and new filters (which allow in-program compression/decompression, program chunking, and advanced error-handling). PostScript 3 was significant in terms of replacing the existing proprietary color electronic prepress systems, then widely used for magazine production, through the introduction of smooth shading operations with up to 4096 shades of grey (rather than the 256 available in PostScript Level 2), as well as DeviceN, a that allowed the addition of additional ink colors (called ) into composite color pages. Use in printing [ ] Before PostScript [ ] Prior to the introduction of PostScript, printers were designed to print character output given the text—typically in —as input. There were a number of technologies for this task, but most shared the property that the were physically difficult to change, as they were stamped onto keys, bands of metal, or optical plates. This changed to some degree with the increasing popularity of.

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