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Computer font

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100: 43: 629:. Therefore, outline font characters can be scaled to any size and otherwise transformed with more attractive results than bitmap fonts, but require considerably more processing and may yield undesirable rendering, depending on the font, rendering software, and output size. Even so, outline fonts can be transformed into bitmap fonts beforehand if necessary. The converse transformation is considerably harder since bitmap fonts require a 2131: 678:. Type 1 fonts were restricted to a subset of the PostScript language, and used Adobe's hinting system, which used to be very expensive. Type 3 allowed unrestricted use of the PostScript language, but did not include any hint information, which could lead to visible rendering artifacts on low-resolution devices (such as computer screens and dot-matrix printers). 738:
savings. For a font developer, editing a glyph by stroke is easier and less prone to error than editing outlines. A stroke-based system also allows scaling glyphs in height or width without altering stroke thickness of the base glyphs. Stroke-based fonts are heavily marketed for East Asian markets for use on embedded devices, but the technology is not limited to
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with the goal of reducing file size. This is particularly important for web fonts, since reducing file size often means reducing page load time and server load. Alternatively, fonts may be issued in different files for different regions of the world, though with the spread of the OpenType format this is now increasingly uncommon.
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Bitmap fonts are faster and easier to create in computer code than other font types, but they are not scalable: a bitmap font requires a separate font for each size. Outline and stroke fonts can be resized in a single font by substituting different measurements for components of each glyph, but they
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A typical font may contain hundreds or even thousands of glyphs, often representing characters from many different languages. Oftentimes, users may only need a small subset of the glyphs that are available to them. Subsetting is the process of removing unnecessary glyphs from a font file, usually
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The primary disadvantage of bitmap fonts is that the visual quality tends to be poor when scaled or otherwise transformed, compared to outline and stroke fonts, and providing many optimized and purpose-made sizes of the same font dramatically increases memory usage. The earliest bitmap fonts were
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have to be used to reduce the visual impact of this problem, which requires sophisticated software that is difficult to implement correctly. Many modern desktop computer systems include software to do this, but they use considerably more processing power than bitmap fonts, and there can be minor
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of the glyph. The advantages of stroke-based fonts over outline fonts include reducing the number of vertices needed to define a glyph, allowing the same vertices to be used to generate a font with a different weight, glyph width, or serifs using different stroke rules, and the associated size
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The limited processing power and memory of early computer systems forced the exclusive use of bitmap fonts. Improvements in hardware have allowed them to be replaced with outline or stroke fonts in cases where arbitrary scaling is desirable, but bitmap fonts are still in common use in embedded
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Although Monotype and Bitstream have claimed tremendous space saving using stroke-based fonts on East Asian character sets, most of the space saving comes from building composite glyphs, which is part of the TrueType specification and does not require a stroke-based approach.
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on bitmap fonts whose size does not match the size that the application requests. This technique works well for making the font smaller but not as well for increasing the size, as it tends to blur the edges. Some graphics systems that use bitmap fonts, especially those of
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are more complicated to render on screen or in print than bitmap fonts because they require additional computer code to render the bitmaps to display on screen and in print. Although all font types are still in use, most fonts used on computers today are outline fonts.
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of glyphs. For each variant of the font, there is a complete set of glyph images, with each set containing an image for each character. For example, if a font has three sizes, and any combination of bold and italic, then there must be 12 complete sets of images.
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and straight line segments, or by filling such paths. Although when stroking a path the envelope of the stroke is never actually generated, the method causes no loss of accuracy or resolution. The method Metafont uses is more mathematically complex because the
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rendering defects, particularly at small font sizes. Despite this, they are frequently used because people often consider the ability to freely scale fonts, without incurring any pixelation, to be important enough to justify the defects and increased
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uses a different sort of glyph description. Like TrueType, it is a vector font description system. It draws glyphs using strokes produced by moving a polygonal or elliptical pen approximated by a polygon along a path made from cubic
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With stroke-based fonts, the same stroke paths can be filled with different stroke profiles resulting in different visual shapes without the need to specify the vertex positions of each outline, as is the case with outline
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used by them cannot be rendered accurately onto a raster display (such as most computer monitors and printers), and their rendering can change shape depending on the desired size and position. Measures such as
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using their own internal fonts, usually with thin single strokes instead of thickly outlined glyphs. The advent of desktop publishing brought the need for a common standard to integrate the
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fonts use a series of specified lines and additional information to define the size and shape of the line in a specific typeface, which together determines the appearance of the glyph.
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The difference between bitmap fonts and outline fonts is similar to the difference between bitmap and vector image file formats. Bitmap fonts are like image formats such as
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To draw a string using a bitmap font means to successively output bitmaps of each character that the string comprises, performing per-character indentation.
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A glyph's outline is defined by the vertices of individual stroke paths, and the corresponding stroke profiles. The stroke paths are a kind of
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A "trace" program can follow the outline of a high-resolution bitmap font and create an initial outline that a font designer uses to create an
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on fonts and other bitmaps, which avoids blurring the font while introducing little objectionable distortion at moderate increases in size.
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only available in certain optimized sizes such as 8, 9, 10, 12, 14, 18, 24, 36, 48, 72, and 96 points (assuming a resolution of 96 
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format (.svg), store instructions in the form of lines and curves of how to draw the image rather than storing the image itself.
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refers to the digital equivalent of a typeface. Since the 1990s, many people outside the printing industry have used the word
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This article is about font technology. For information about the typographic appearance of individual font sets, see
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size. Some systems using bitmap fonts can create some font variants algorithmically. For example, the original
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Unscaled bitmap fonts always give exactly the same output when displayed on the same specification display
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Best for very low-quality or small-size displays where the font needs to be fine-tuned to display clearly
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refers to the collection of related fonts across styles and sizes (for example, all the varieties of
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to guess and approximate the corresponding curves if the pixels do not make a straight line.
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used bitmap fonts; often stored in the memory of the printer and addressed by the computer's
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systems and other places where speed and simplicity are considered important.
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developed DigiType, a stroke-based font format. In 2006, the creators of the
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computer could produce bold by widening vertical strokes and oblique by
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the image. At non-native sizes, many text rendering systems perform
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Comparison between printed (top) and digital (bottom) versions of
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There are three basic kinds of computer font file data formats:
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background, "shades of gray" require an image format allowing
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An assortment of bitmap fonts from the first version of the
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representing the image of each glyph in each face and size.
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announced a representation for stroke-based fonts called
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Jakubiak, Elena J.; Perry, Ronald N.; Frisken, Sarah F.
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or a pixel font. Bitmap fonts are simply collections of
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The primary advantage of outline fonts is that, unlike
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Packed bitmap font bitmap file for TeX DVI drivers (PK)
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fonts (including, and sometimes used as a synonym for,
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Monochrome fonts vis-Ă -vis fonts with shades of gray
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Using 8: 1633: 797:of uniform-width stroke-based fonts (USFs). 749:(iType) and Type Solutions, Inc. (owned by 27:Digital description of a typographical font 1571: 1295: 1161: 1147: 1139: 1088:"History and technology of computer fonts" 2117:Punctuation and other typographic symbols 689:is a font system originally developed by 87:Learn how and when to remove this message 486: 118:containing a set of graphically related 50:This article includes a list of general 1092:IEEE Annals of the History of Computing 930: 547:FZX a proportional bitmap font for the 394:Bitmap fonts look best at their native 1043:"Vector Graphics & Path Rendering" 1011:"The raster tragedy at low resolution" 523:Microsoft Windows bitmapped font (FON) 263:A bitmap font is one that stores each 195:fonts consist of a matrix of dots or 7: 1135:Over 50 entries with helpful diagram 291:Advantages of bitmap fonts include: 704:is a smart font system designed by 295:Extremely fast and simple to render 275:). It is less commonly known as a 574:. Early vector fonts were used by 541:(SFN, also supports outline fonts) 298:Easier to create than other kinds. 56:it lacks sufficient corresponding 25: 2130: 2129: 506:Glyph Bitmap Distribution Format 169:, and related technologies, the 41: 1049:from the original on 2014-08-13 950:from the original on 2015-09-01 526:Amiga Font, ColorFont, AnimFont 360:final rendering of vector fonts 1041:Mark Kilgard (10 April 2012). 745:Commercial developers include 358:Digital bitmap fonts (and the 343:. Bitmap fonts may be used in 1: 2086:History of Western typography 1118:Finding Fonts FAQ (Microsoft) 520:Sun X11/NeWS format (BF, AFM) 320:Bitmap fonts are used in the 1933:traditional point-size names 491:A bitmap color font for the 114:is implemented as a digital 1186:Canons of page construction 970:"BMF – ByteMap font format" 408:nearest-neighbor resampling 2172: 1009:Stamm, Beat (1998-03-25). 471:useful in systems such as 258:Macintosh operating system 153:Expanded 14 point), and a 29: 2125: 1343:Subscript and superscript 834:Apple Advanced Typography 761:Stroke-based font formats 443:Portable Network Graphics 2101:Vox-ATypI classification 1231:Intentionally blank page 648:computational complexity 584:graphical user interface 500:Portable Compiled Format 461:Scalable Vector Graphics 419:, apply curve-sensitive 771:composite BĂ©zier curves 664:Type 1 and Type 3 fonts 659:Type 1 and Type 3 fonts 604:Type 1 and Type 3 fonts 71:more precise citations. 1634: 1133:Glossary of Font Terms 1128:Microsoft's font guide 730: 495: 260: 133:In the terminology of 107: 791:Stylized Stroke Fonts 727: 517:DECWindows Font (DWF) 490: 255: 171:font family attribute 102: 1971:Typographic features 940:"Anti-Anti-Aliasing" 735:topological skeleton 654:Outline font formats 539:Scalable Screen Font 512:Server Normal Format 421:nonlinear resampling 384:partial transparency 2096:Technical lettering 1995:Typography in other 1736:Hanging punctuation 1086:Wright, T. (1998). 907:Saffron Type System 787:Saffron Type System 631:heuristic algorithm 566:are collections of 483:Bitmap font formats 449:Tagged Image Format 423:algorithms such as 337:dot matrix printers 2156:Digital typography 2059:Handwriting script 1986:Desktop publishing 1956:Character encoding 1949:Digital typography 1463:Horizontal aspects 1416:Visual distinction 1274:Widows and orphans 731: 720:Stroke-based fonts 666:were developed by 529:ByteMap Font (BMF) 496: 458:format (.wmf) and 261: 135:movable metal type 108: 2143: 2142: 1890:Typographic units 1808:For position only 1707: 1706: 1559: 1558: 1104:10.1109/85.667294 913:Unicode typefaces 874:List of typefaces 149:bold 12 point or 97: 96: 89: 16:(Redirected from 2163: 2133: 2132: 2110:Related template 2042:Related articles 1843:Phototypesetting 1697:reverse-contrast 1682:Display typeface 1639: 1616:Blackletter type 1572: 1509:Vertical aspects 1490:Sentence spacing 1300:Typeface anatomy 1296: 1163: 1156: 1149: 1140: 1107: 1073: 1072: 1071:. SIGGRAPH 2006. 1064: 1058: 1057: 1055: 1054: 1038: 1032: 1031: 1029: 1028: 1019:. Archived from 1006: 1000: 999: 991: 985: 984: 982: 980: 966: 960: 959: 957: 955: 935: 839:Display typeface 795:memory footprint 455:Windows Metafile 370:. 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Index

Raster font
Typeface
references
inline citations
improve
introducing
Learn how and when to remove this message

Perpetua
data file
glyphs
font editor
movable metal type
font
typeface
Gill Sans
Century
typeface
Gill Sans
HTML
CSS
font family attribute
synonym
pixels
BĂ©zier curves
monospaced
proportional
justifying text

Macintosh operating system

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