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Postscript definitions for special troff characters. File names are
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the two character troff names. Each defines a PostScript procedure
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that begins with build_ and ends with the character's name. The
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build_?? procedure is called with the character width as it's only
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argument. The .map files contain extra character data (e.g. image
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data) that dpost downloads immediately after the build_?? call,
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if the character's font table code field is 2 (rather than 1).
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The following PostScript variables are available:
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font current font
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ptsize current point size
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size actual font size - scaled up from ptsize
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Don't overuse this stuff!
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