Ghostscript is a suite of software based on an

interpreter Interpreting is translation from a spoken or signed language into another language, usually in real time to facilitate live communication. It is distinguished from the translation of a written text, which can be more deliberative and make use o ...

for

Adobe Systems Adobe Inc. ( ), formerly Adobe Systems Incorporated, is an American software, computer software company based in San Jose, California. It offers a wide range of programs from web design tools, photo manipulation and vector creation, through to ...

PostScript PostScript (PS) is a page description language and dynamically typed, stack-based programming language. It is most commonly used in the electronic publishing and desktop publishing realm, but as a Turing complete programming language, it c ...

and

Portable Document Format Portable document format (PDF), standardized as ISO 32000, is a file format developed by Adobe in 1992 to present documents, including text formatting and images, in a manner independent of application software, hardware, and operating syste ...

(PDF)

page description language In digital printing, a page description language (PDL) is a computer language that describes the appearance of a printed page in a higher level than an actual output bitmap (or generally raster graphics). An overlapping term is printer control ...

s. Its main purposes are the

rasterization In computer graphics, rasterisation (British English) or rasterization (American English) is the task of taking an image described in a vector graphics format (shapes) and converting it into a raster image (a series of pixels, dots or lines, whic ...

of documents in these language,, the display or printing of document pages, and conversion between PostScript and PDF files.

Features

Ghostscript can be used as a

raster image processor A raster image processor (RIP) is a component used in a printing system which produces a raster image also known as a bitmap. Such a bitmap is used by a later stage of the printing system to produce the printed output. The input may be a page ...

(RIP) for raster

computer printer A printer is a peripheral machine which makes a durable representation of graphics or text, usually on paper. While most output is human-readable, bar code printers are an example of an expanded use for printers. Different types of printer ...

s—for instance, as an input filter of

line printer daemon The Line Printer Daemon protocol/Line Printer Remote protocol (or LPD, LPR) is a network printing protocol for submitting print jobs to a remote printer. The original implementation of LPD was in the Berkeley printing system in the BSD UNIX ope ...

—or as the RIP engine behind PostScript and PDF viewers. It can also be used as a file format converter, such as PostScript to PDF converter. The ps2pdf conversion program comes with the Ghostscript distribution. Ghostscript can also serve as the back-end for PDF to

raster image upright=1, The Smiley, smiley face in the top left corner is a raster image. When enlarged, individual pixels appear as squares. Enlarging further, each pixel can be analyzed, with their colors constructed through combination of the values for ...

(png, tiff, jpeg, etc.) converter; this is often combined with a PostScript printer driver in "

virtual printer In computing a virtual printer is a simulated device whose user interface and API resemble that of a printer driver, but which is not connected to a physical computer printer. When a document is "printed" by a virtual printer, instead of physica ...

" PDF creators. As it takes the form of a language interpreter, Ghostscript can also be used as a general purpose programming environment. Ghostscript has been

ported In software engineering, porting is the process of adapting software for the purpose of achieving some form of execution in a computing environment that is different from the one that a given program (meant for such execution) was originally desig ...

to many operating systems, including

Unix-like A Unix-like (sometimes referred to as UN*X, *nix or *NIX) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification. A Uni ...

systems,

classic Mac OS Mac OS (originally System Software; retronym: Classic Mac OS) is the series of operating systems developed for the Mac (computer), Macintosh family of personal computers by Apple Computer, Inc. from 1984 to 2001, starting with System 1 and end ...

OpenVMS OpenVMS, often referred to as just VMS, is a multi-user, multiprocessing and virtual memory-based operating system. It is designed to support time-sharing, batch processing, transaction processing and workstation applications. Customers using Op ...

Microsoft Windows Windows is a Product lining, product line of Proprietary software, proprietary graphical user interface, graphical operating systems developed and marketed by Microsoft. It is grouped into families and subfamilies that cater to particular sec ...

, Plan 9,

MS-DOS MS-DOS ( ; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal computers mostly developed by Microsoft. Collectively, MS-DOS, its rebranding as IBM PC DOS, and a few op ...

FreeDOS FreeDOS (formerly PD-DOS) is a free software operating system for IBM PC compatible computers. It intends to provide a complete MS-DOS-compatible environment for running Legacy system, legacy software and supporting embedded systems. FreeDOS ca ...

OS/2 OS/2 is a Proprietary software, proprietary computer operating system for x86 and PowerPC based personal computers. It was created and initially developed jointly by IBM and Microsoft, under the leadership of IBM software designer Ed Iacobucci, ...

ArcaOS ArcaOS is a Proprietary software, proprietary operating system based on OS/2, developed and marketed by Arca Noae, LLC under license from IBM. It was first released in 2017 and builds on OS/2 Warp 4.52 by adding support for new hardware, fixing ...

Atari TOS TOS (The Operating System) is the operating system of the Atari ST range of computers. This range includes the 520ST and 1040ST, their STF/M/FM and STE variants and the Mega ST/STE. Later, 32-bit machines ( TT, Falcon030) were developed using a ...

RISC OS RISC OS () is an operating system designed to run on ARM architecture, ARM computers. Originally designed in 1987 by Acorn Computers of England, it was made for use in its new line of ARM-based Acorn Archimedes, Archimedes personal computers an ...

and

AmigaOS AmigaOS is a family of proprietary native operating systems of the Amiga and AmigaOne personal computers. It was developed first by Commodore International and introduced with the launch of the first Amiga, the Amiga 1000, in 1985. Early versions ...

History

Ghostscript was originally written by

L. Peter Deutsch L Peter Deutsch (born Laurence Peter Deutsch on August 7, 1946, in Boston, Massachusetts) is an American computer scientist and composer. He is the founder of Aladdin Enterprises and creator of Ghostscript, a free software PostScript and PDF int ...

for the

GNU Project The GNU Project ( ) is a free software, mass collaboration project announced by Richard Stallman on September 27, 1983. Its goal is to give computer users freedom and control in their use of their computers and Computer hardware, computing dev ...

, and released under the

GNU General Public License The GNU General Public Licenses (GNU GPL or simply GPL) are a series of widely used free software licenses, or ''copyleft'' licenses, that guarantee end users the freedom to run, study, share, or modify the software. The GPL was the first ...

in 1988. At the time of the initial release there was a similar commercial software product named GoScript from LaserGo. Later, Deutsch formed ''Aladdin Enterprises'' to

dual-license Multi-licensing is the practice of distributing software under two or more different sets of terms and conditions. This may mean multiple different software licenses or sets of licenses. Prefixes may be used to indicate the number of licenses ...

Ghostscript also under a

proprietary license Proprietary software is software that grants its creator, publisher, or other rightsholder or rightsholder partner a legal monopoly by modern copyright and intellectual property law to exclude the recipient from freely sharing the software or modi ...

with an own development

fork In cutlery or kitchenware, a fork (from 'pitchfork') is a utensil, now usually made of metal, whose long handle terminates in a head that branches into several narrow and often slightly curved tines with which one can spear foods either to h ...

: ''Aladdin Ghostscript'' under the

Aladdin Free Public License The Aladdin Free Public License, abbreviated AFPL, is a license written by L. Peter Deutsch for his Ghostscript PostScript language interpreter. History The license was derived from the GNU General Public License, but differs on two key points ...

(which, despite the name, is not a free software license, as it forbids commercial distribution) and ''GNU Ghostscript'' distributed with the ''GNU General Public License''. With version 8.54 in 2006, both development branches were merged again, and dual-licensed releases were still provided.''"I have some great news to report. The leading edge of Ghostscript development is now under GPL license, as is the latest release, Ghostscript 8.54."'' Ghostscript is currently owned by Artifex Software and maintained by Artifex Software employees and the worldwide user community. According to Artifex, as of version 9.03, the commercial version of Ghostscript can no longer be freely distributed for commercial purposes without purchasing a license, though the (A)GPL variant allows commercial distribution provided all code using it is released under the (A)GPL. In February 2013, with version 9.07, Ghostscript changed its license from GPLv3 to

GNU AGPL The GNU Affero General Public License (GNU AGPL) is a free, copyleft license published by the Free Software Foundation in November 2007, and based on the GNU GPL version 3 and the ''Affero General Public License'' (non-GNU). It is intended for ...

. which raised

license compatibility License compatibility is a legal framework that allows for pieces of software with different software licenses to be distributed together. The need for such a framework arises because the different licenses can contain contradictory requireme ...

questions, for example by

Debian Debian () is a free and open-source software, free and open source Linux distribution, developed by the Debian Project, which was established by Ian Murdock in August 1993. Debian is one of the oldest operating systems based on the Linux kerne ...

. Starting with release 9.55.0 Ghostscript has two built-in PDF interpreters. Until spring 2022, up to Ghostscript version 9.56.1, the default PDF interpreters implementation itself was coded in PostScript. The new default PDF interpreter has been rewritten in C entirely, and is faster and more secure than its predecessor, while its interface and graphics library have not changed. Scripting the new C written PDF interpreter from PostScript is still possible.

Free fonts

There are several sets of free fonts supplied for Ghostscript, intended to be metrically compatible with common fonts attached with the PostScript standard. These include: * A collection of 35 font styles from ten typeface families contributed by German foundry

URW++ URW Type Foundry GmbH (formerly URW++ Design & Development GmbH) is a type foundry based in Hamburg, Germany. The foundry has its own library with more than 500 font families. The company specializes in customized corporate typefaces and the dev ...

in 1996 under the

(GPL) and

(AFPL), which is commonly called the "URW Base 35 fonts" or "URW Core 35 fonts". The collection is similar to the 35 fonts defined by Adobe in PostScript Level 2: Bookman L ( Bookman), Century Schoolbook L ( New Century Schoolbook), Chancery L ( Zapf Chancery), Dingbats (

Zapf Dingbats ITC Zapf Dingbats is one of the more common dingbat typefaces. It was designed by the typographer Hermann Zapf in 1978 and licensed by International Typeface Corporation. History In 1977, Zapf created about 1000 (or over 1200 according to Lin ...

), Gothic L (

Avant Garde In the arts and literature, the term ''avant-garde'' ( meaning or ) identifies an experimental genre or work of art, and the artist who created it, which usually is aesthetically innovative, whilst initially being ideologically unacceptable ...

Nimbus Mono L Nimbus Mono is a monospaced typeface created by URW Studio in 1984, and eventually released under the GPL and AFPL (as Type 1 font for Ghostscript) in 1996 and LPPL in 2009. In 2017, the font, alongside other Core 35 fonts, has been additional ...

(

Courier A courier is a person or organization that delivers a message, package or letter from one place or person to another place or person. Typically, a courier provides their courier service on a commercial contract basis; however, some couriers are ...

Nimbus Roman No9 L Nimbus Roman is a serif typeface created by URW Studio in 1982. Nimbus Roman No. 9 L is a serif typeface created by URW Studio in 1987, and eventually released under the GPL and AFPL (as Type 1 font for Ghostscript) in 1996 and LPPL ...

( Times),

Nimbus Sans L Nimbus Sans is a sans-serif typeface created by URW++, based on Helvetica. Nimbus Sans It is a version using URW++ font source. The family supports Western Europe, East Europe, Turkish, Baltic, and Romanian languages. The font names ending wit ...

(

Helvetica Helvetica, also known by its original name Neue Haas Grotesk, is a widely-used sans-serif typeface developed in 1957 by Swiss typeface designer Max Miedinger and Eduard Hoffmann. Helvetica is a neo-grotesque design, one influenced by the f ...

), Palladio L (

Palatino Palatino is an old-style serif typeface designed by Hermann Zapf, initially released in 1949 by the Stempel foundry and later by other companies, most notably the Mergenthaler Linotype Company. Palatino is optimised for legibility with open ...

), Standard Symbols L (

Symbol A symbol is a mark, Sign (semiotics), sign, or word that indicates, signifies, or is understood as representing an idea, physical object, object, or wikt:relationship, relationship. Symbols allow people to go beyond what is known or seen by cr ...

), in Type1, TrueType, and OpenType formats. *The GhostPDL package (including Ghostscript as well as companion implementations of HP PCL and Microsoft XPS) includes additional fonts under the AFPL which bars commercial use. It includes URW++ versions of

Garamond Garamond is a group of many serif typefaces, named for sixteenth-century Parisian engraver Claude Garamond, generally spelled as Garamont in his lifetime. Garamond-style typefaces are popular to this day and often used for book printing and bod ...

(Garamond No. 8),

Optima Optima is a Humanist sans-serif, humanist sans-serif typeface designed by Hermann Zapf and released by the D. Stempel AG foundry, Frankfurt, West Germany in 1958. Though classified as a sans-serif, Optima has a subtle swelling at the terminals s ...

(URW Classico),

Arial Arial is a sans-serif typeface in the Sans-serif#Neo-grotesque, neo-grotesque style. Fonts from the Arial family are included with all versions of Microsoft Windows after Windows 3.1, as well as in other Microsoft programs, Apple's macOS, and ma ...

(A030),

Antique Olive Antique Olive is a humanist sans-serif typeface ("antique" being equivalent to sans-serif in French typographic conventions). Along the lines of Gill Sans, it was designed in the early 1960s by French typographer Roger Excoffon, an art director ...

, and

Univers Univers () is a sans-serif typeface family designed by Adrian Frutiger and released by his employer Deberny & Peignot in 1957. Classified as a Grotesque (typeface classification), neo-grotesque sans-serif, one based on the model of nineteenth-cen ...

(U001), Clarendon,

Coronet In British heraldry, a coronet is a type of crown that is a mark of rank of non-reigning members of the royal family and peers. In other languages, this distinction is not made, and usually the same word for ''crown'' is used irrespective of ra ...

, Letter Gothic, as well as URW Mauritius and a modified form of Albertus known as A028. Combined with the base set, they represent a little more than half of the standard PostScript 3 font complement. * A miscellaneous set including

Cyrillic The Cyrillic script ( ) is a writing system used for various languages across Eurasia. It is the designated national script in various Slavic, Turkic, Mongolic, Uralic, Caucasian and Iranic-speaking countries in Southeastern Europe, Ea ...

kana are syllabary, syllabaries used to write Japanese phonology, Japanese phonological units, Mora (linguistics), morae. In current usage, ''kana'' most commonly refers to ''hiragana'' and ''katakana''. It can also refer to their ancestor , wh ...

, and fonts derived from the free Hershey fonts, with improvements by Thomas Wolff (such as adding accented characters). The Ghostscript fonts were developed in the PostScript Type 1 format but have been converted into the TrueType format. As a result, a user can install and use the Ghostscript fonts via most modern software. Furthermore, the Ghostscript fonts are used as parts of various open source applications, e.g., the Linux version of

GIMP Gimp or GIMP may refer to: Clothing * Bondage suit, also called a gimp suit, a type of suit used in BDSM * Bondage mask, also called a gimp mask, often worn in conjunction with a gimp suit Embroidery and crafts * Gimp (thread), an ornamental tr ...

depends on

Graphviz Graphviz (short for ''Graph Visualization Software'') is a package of open-source software, open-source tools initiated by AT&T Labs, AT&T Labs Research for Graph drawing, drawing graph (discrete mathematics), graphs (as in Vertex (graph theory ...

which in turn depends on the Ghostscript fonts. Finally, multiple open source font projects used glyphs from the Ghostscript fonts, e.g., the Latin characters of

GNU FreeFont GNU FreeFont (also known as Free UCS Outline Fonts) is a family of free OpenType, TrueType and WOFF vector fonts, implementing as much of the Universal Character Set (UCS) as possible, aside from the very large CJK Asian character set. The ...

are based on

, and

. The TeX Gyre fonts are also based on 8 out of the 10 original Ghostscript typeface families. The Garamond font has additionally been improved upon.

References

External links

*
Ghostscript version 8.56 and earlier

Ghostscript/GhostPDL binaries download page
at GitHub (cross-platform, this site is actively maintained)
GPL Ghostscript binaries download page
at SourceForge (cross-platform, this site is no longer actively maintained) {{PDF software Computer-related introductions in 1988 Cross-platform software Digital press Free PDF readers PostScript Software using the GNU Affero General Public License

Features

History

Free fonts

See also

References

External links