printer ( prn) outline ( FOND/bitmap) file. Mac: : LWFN (prn/outline-data/Mac-bitmap). Type 1 PostScript Type 1 Filename extension A composite font is composed of a high-level font that references multiple descendant fonts. Type 0 is a "composite" font format - as described in the PostScript Language Reference Manual, 2nd Edition. Otherwise, in order to preview the Type 1 fonts in typesetting applications, the Adobe Type Manager utility was required. This often came in the form of an additional bitmap font of the same typeface, optimized for screen display. For users wanting to preview these typefaces on an electronic display, small versions of a font need extra hints and anti-aliasing to look legible and attractive on screen. a bitmap), Type 1 fonts are commonly referred to as "outline fonts," as opposed to bitmap fonts. Because the data of Type 1 is a description of the outline of a glyph and not a raster image (i.e. Technologyīy using PostScript (PS) language, the glyphs are described with cubic Bézier curves (as opposed to the quadratic curves of TrueType), and thus a single set of glyphs can be resized through simple mathematical transformations, which can then be sent to a PostScript-ready printer. The Type 2 format has since been used as one basis for the modern OpenType Format. Font development tools such as Fontographer added the ability to create Type 1 fonts. Immediately following the announcement of TrueType, Adobe published ”Adobe type 1 font format”, a detailed specification for the format. It was this issue that led Apple to design their own system, TrueType, around 1991. The cost of the licensing was considered very high at this time, and Adobe continued to stonewall on more attractive rates. Other differences further added to the confusion. Type 3 fonts allowed for all the sophistication of the PostScript language, but without the standardized approach to hinting (though some companies such as ATF implemented their own proprietary schemes) or an encryption scheme.
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Adobe nevertheless required anyone working with Type 1 fonts to license their technology. Despite these measures, Adobe's scheme was quickly reverse-engineered by other players in the industry. Originally, Adobe kept the details of their hinting scheme undisclosed and used a (simple) encryption scheme to protect Type 1 outlines and hints, which still persists today (although the encryption scheme and key has since been published by Adobe).
Type 1 and Type 3 fonts, though introduced by Adobe in 1984 as part of the PostScript page description language, did not see widespread use until March 1985 when the first laser printer to use the PostScript language, the Apple LaserWriter, was introduced.Įven then, in 1985, the outline fonts were resident only in the printer, and the screen used bitmap fonts as substitutes for outline fonts.Īlthough originally part of PostScript, Type 1 fonts used a simplified set of drawing operations compared to ordinary PostScript (programmatic elements such as loops and variables were removed, much like PDF), but Type 1 fonts added "hints" to help low-resolution rendering. "PostScript fonts" may also separately be used to refer to a basic set of fonts included as standards in the PostScript system, such as Times New Roman, Helvetica, and Avant Garde.
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PostScript fonts are font files encoded in outline font specifications developed by Adobe Systems for professional digital typesetting. ( November 2009) ( Learn how and when to remove this template message) Please help to improve this article by introducing more precise citations. This article includes a list of general references, but it remains largely unverified because it lacks sufficient corresponding inline citations.
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