Xerox 721P87491 Implementation-dependent operations, Floating-point arithmetic and math operators

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2.PostScript

This chapter provides an overview of standard PostScript operations and guidelines for ensuring consistent printer output.

Implementation-dependent operations

The following operations are implementation-dependent.

Floating-point arithmetic and math operators

All PostScript floating-point arithmetic and math operators are implementation-dependent if you use very large or very small floating-point numbers. This is rarely a problem with PostScript masters generated by “real world” creators; that is, commercial PostScript creators such as Word or Excel. Handwritten test masters, however, can cause problems.

Some handwritten test masters print out the limits of floating point numbers and various floating-point operations. Because these values may vary based on the PostScript implementation, the test master output also varies, making these tests useless for testing consistency across different PostScript printers.

Coordinate system default matrix

The PostScript current transformation matrix (CTM) controls the mapping of user coordinates to device coordinates. You can describe pages in your own coordinate system and let the PostScript software transform your requests into the device space. PostScript masters are device independent only when they do not use the actual CTM values. When a master needs CTM values, it becomes device- dependent. The occasional need for CTM values causes inconsistent output across different PostScript printers.

Some handwritten test masters print out CTM values. Since these values vary, depending on the device resolution and positioning, the test master output also varies, making these tests useless for consistency testing across different PostScript printers.

XEROX DOCUPRINT NPS GUIDE TO USING PAGE DESCRIPTION LANGUAGES

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Contents Version 7.1 August 2000 721P87491 Page Laser safety Operation safetyOzone information Conductor may result in risk of electrical shock. grounding Table of contents PostScript Index VippViii Contents About this guideConventions Introduction Related publications Related informationPostScript publications Vipp publication HP PCL 5 publicationsMaintaining image quality PCLOFF PCL 5 font support PCL 5 media supportPCL 5 fonts installed with NPS software PCL command support PJL commandsPCL Copy command Duplex PCL Copy command example PCL Copy command examplePCL Duplex commands DocuPrint NPS Collated HP LaserJet 4si PCL Duplex commandsPCL Job Separation command PCL media selection PCL Paper Source command tray assignmentPrecedence in selecting media PCL Offset Registration commands PCL Output Bin commandPCL 5 coding recommendations PCL 5c supportPCL 5c functions not applicable to DocuPrint NPS PCL 5c coding recommendationsLimitations for custom PCL 5c drivers Driver recommendations for PCL 5cCoordinate system default matrix Implementation-dependent operationsFloating-point arithmetic and math operators Fonts Adobe Type1 PostScript fontsFont Typeface User-defined fonts Loading fontsType 1 fonts Using Adobe Type 1 fontsProducing Type 1 fonts for use with DocuPrint Using a Type 1 font in a documentPostScript with embedded PJL commands PostScript language extensionsSystem Dict Server Dict User DictStatus Dict IdleTime DictionaryDfltkIdleArry needflush Nonstandard definitions Statusdict Userdict Printer resolution and resolution enhancementAppearance consistency Examples of nonstandard definitionsDpi image Printed on a 300 dpi printer Printer imaging characteristics Proprietary PostScript extensions Font consistencyControl-D as binary data and end-of-job Control-Z and superfluous errorsSolution to control-Z and control-D problems Multiple jobs in one input file Simulated mixed plex DocuPrint NPS implementation of PostScript LevelPrinter Controller operations Scan conversion detailsStroke Shapes FillZero-width lines strokes Curved shapesImages Image quality Rendering of color and gray values transfer function Implementation limits PostScript printer description PPD filesFile operators and standard devices Implementation limitsQuantity Limit Description Device orientation and setscreen operator Path limitsPostScript VM limits SetCacheDevicePostScript storage object size limits Obsolete operators-banddevice, framedevice, renderbandsArc to Bezier conversion-pathforall Creating the necessary PostScript Ccitt Group 3 Print performance related to image printingScan order and rotation Image orientation mismatch a PurposeImage orientation mismatch B 10.Image pixel sequence example Summary Considerations11.Scaling and resolution example Scan resolution and scaling12.PostScript with embedded image normal scan order MaxX exch def /minY exch def /minX exch def 14.Actual PostScript print Page Vipp Operating environment FunctionalityVipp line mode extension XGFNub Page Ccitt SymbolsIndex PCL PPD Index

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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