In addition to East Asian characters and such forms, it is common for other technical and pictographic symbols to become duospaced in some East Asian fonts, a phenomenon known as "ambiguous width". ĬJK monospace fonts typically include halfwidth and fullwidth forms of characters that provide different widths for typesetting. 1990) Western distinction Asian typefaces with such characteristics simply call themselves "monospaced" or "fixed pitch". Note that this "duospace" name is mostly a historical (c. The idea of a "duospaced" font came from East Asian typography, where the local scripts of CJK characters simply cannot fit into a narrow column used in Latin fixed-pitch fonts. This extra horizontal space allows for the accommodation of wider glyphs, such as large ideographs, that cannot reasonably fit into the single character width of strictly uniform, monospaced font. And, unlike monospaced fonts, this means a character can occupy up to two effective character widths instead of a single character width. This contrasts with variable-width fonts, where the letters and spacings have more than two different widths. These dual character widths are also referred to as half-width and full-width, where a full-width character occupies double the width of a half-width character. Traditionally, this means either a single or double character width, although the term has also been applied to fonts using fixed character widths with another simple ratio between them. Font with glyphs of two different fixed widths Visual comparison of a duospaced CJK font (Migu 2M) versus a monospaced font ( Consolas).Ī duospaced font (also called a duospace font) is a fixed-width font whose letters and characters occupy either of two integer multiples of a specified, fixed horizontal space.
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