POSTSCRIPT

Printer Controller operations

The DocuPrint NPS Printer Controller operates as follows:

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PostScript stdout messages are printed on the “JOB MESSAGES AND ERRORS” page. DocuPrint PostScript prints error messages directed to %stderr on the “JOB MESSAGES AND ERRORS” page as well.

PostScript font substitution error messages appear on the “JOB MESSAGES AND ERRORS” page only when the requested font is not present and is not one of the DocuPrint base 51 font set.

•DocuPrint does not emulate the serial communications handling aspects of the LaserWriter. Notably, DocuPrint syntactically treats control-D and control-Z as literal characters in ASCII strings and binary data, not as end-of-file delimiters. Also, DocuPrint does not strip high bits from character string data. Instead DocuPrint treats all input bytes as valid PostScript.

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DocuPrint handles ASCII or binary input transparently and does not require two input modes.

DocuPrint wraps each PostScript document with a save and restore to ensure that documents are independent. DocuPrint NPS implements the exitserver operator to permit modifying PostScript virtual memory within a document, but not across documents.

DocuPrint performs standard PostScript error handling when it encounters LaserWriter-specific operators that DocuPrint NPS does not implement. The error handling process produces a standard PostScript “undefined command” message and flushes the master to end-of-file.

Scan conversion details

DocuPrint NPS uses the scan conversion rules to control the

PostScript painting operators stroke, fill, clip, and image.

The scan conversion process and rules are not defined as part of the PostScript language. They are subject to variations depending on algorithms used in different PostScript printing devices to achieve the most accurate rendition possible. The sections below describe the stroke and fill operators.

Stroke

Stroke refers to painting a line that follows the current path, is centered on the path, and has sides parallel to the path segment. “Path” includes a thickness set by the operator setlinewidth.

DocuPrint NPS turns on any device pixels whose centers lie within the width of the path to be stroked. The pixels whose centers lie outside of the width of the path are turned off.

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XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

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Xerox 721P87491 manual Printer Controller operations, Scan conversion details, Stroke
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721P87491 specifications

The Xerox 721P87491 is a remarkable printing device that showcases advanced technology tailored for professional environments, ensuring high-quality output and efficiency. Aimed at meeting the demands of busy offices, this model is recognized for its reliability and innovative features.

At the core of the Xerox 721P87491's appeal is its robust printing capabilities. It offers an impressive resolution, enabling the production of crisp and clear documents, whether in black and white or color. This high-resolution output is particularly essential for businesses that require detailed graphics, intricate charts, or professional-grade presentations.

One of the standout features of the Xerox 721P87491 is its impressive speed. It is designed to handle high-volume printing, significantly enhancing productivity in fast-paced work environments. With a rapid print speed per minute, users can expect swift processing of print jobs, ensuring that document delivery times are minimized.

The device also boasts advanced connectivity options. It supports both wired and wireless connections, allowing for seamless integration into a variety of office networks. This flexibility facilitates printing from multiple devices, including desktop computers, laptops, and mobile devices, enhancing overall workflow and collaboration within teams.

Additionally, the Xerox 721P87491 incorporates user-friendly interface options. With an intuitive touchscreen display, navigating the printer's functions becomes simpler. Users can easily access common features, adjust settings, and manage print jobs efficiently.

Another notable characteristic is its advanced security features. Given today's emphasis on data protection, the Xerox 721P87491 is equipped with robust security protocols to safeguard sensitive documents. It includes features like secure print, which holds documents until the authorized user enters a PIN, ensuring confidentiality in high-stakes environments.

Moreover, the Xerox 721P87491 demonstrates an emphasis on environmental sustainability. It is designed to be energy efficient, reducing power consumption during both idle and active states. The printer also supports duplex printing, which helps decrease paper use, contributing to a more sustainable office practice.

In summary, the Xerox 721P87491 is a versatile printing solution that merges efficiency, quality, and advanced technology. With high-speed printing, intuitive controls, robust security features, and a commitment to sustainability, it stands out as an excellent choice for businesses aiming to boost productivity while maintaining high standards. Its capabilities make it a worthy investment for any modern office environment.
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