(kpathsea.info)Basic glyph lookup
4.3.1 Basic glyph lookup
When Kpathsea looks for a bitmap font NAME at resolution DPI in a
format FORMAT, it first checks each directory in the search path for a
file `NAME.DPIFORMAT'; for example, `cmr10.600pk'. Kpathsea looks for
a PK file first, then a GF file.
If that fails, Kpathsea looks for `dpiDPI/NAME.FORMAT'; for example,
`dpi600/cmr10.pk'. This is how fonts are typically stored on
filesystems (such as DOS) that permit only three-character extensions.
If that fails, Kpathsea looks for a font with a close-enough DPI.
"Close enough" is defined by the macro `KPSE_BITMAP_TOLERANCE' in
`kpathsea/tex-glyph.h' to be `DPI / 500 + 1'. This is slightly more
than the 0.2% minimum allowed by the DVI standard
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