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mdbFontset(5)                    Version 1.5.5                   mdbFontset(5)


NAME

       mdbFontset - Fontset


DESCRIPTION

       The m17n library loads a fontset definition from the m17n database by
       the tags <fontset, FONTSET-NAME>. The plist format of the data is as
       follows:

       FONTSET ::= PER-SCRIPT * PER-CHARSET * FALLBACK *

       PER-SCRIPT ::= '(' SCRIPT PER-LANGUAGE + ')'

       PER-LANGUAGE ::= '(' LANGUAGE FONT-SPEC-ELEMENT + ')'

       PER-CHARSET ::= '(' CHARSET FONT-SPEC-ELEMENT + ')'

       FALLBACK ::= FONT-SPEC-ELEMENT

       FONT-SPEC-ELEMENT ::= '(' FONT-SPEC [ FLT-NAME ] ')'

       FONT-SPEC ::=
            '(' [ FOUNDRY FAMILY
                  [ WEIGHT [ STYLE [ STRETCH [ ADSTYLE ]]]]]
                REGISTRY
             [ OTF-SPEC ] [ LANG-SPEC ] ')'

       SCRIPT is a symbol of script name (e.g. latin, han) or nil. LANGUAGE is
       a two-letter symbol of language name code defined by ISO 639 (e.g. ja,
       zh) or nil.

       FONT-SPEC is to specify properties of a font. FOUNDRY to REGISTRY are
       symbols corresponding to Mfoundry to Mregistry property of a font. See
       m17nFont for the meaning of each property.

       OTF-SPEC is a symbol specifing the required OTF features. The symbol
       name has the following syntax.

         OTF-SPEC-NAME ::= ':otf=' SCRIPT LANGSYS ? GSUB-FEATURES ? GPOS-FEATURES ?

         SCRIPT ::= SYMBOL
         LANGSYS ::= '/' SYMBOL

         GSUB-FEATURES ::= '=' FEATURE-LIST ?

         GPOS-FEATURES ::= '+' FEATURE-LIST ?

         FEATURE-LIST ::= '~' ? FEATURE ( ',' '~' ? FEATURE ',' )

       Here, FEATURE is a four-letter Open Type feature.

       LANG-SPEC is a symbol specifying the required language support. The
       symbol name has the following syntax.

         LANG-SPEC-NAME ::= ':lang=' LANG

       Here, LANG is a two or three-letter ISO-639 language code.

       FLT-NAME is a name of Font Layout Table (Font Layout Table).


EXAMPLE

       This is an example of PER_SCRIPT.

       (han
         (ja
           ((jisx0208.1983-0)))
         (zh
           ((gb2312.1980-0)))
         (nil
           ((big5-0))))

       It instructs the font selector to use a font of registry
       'jisx0208.1983-0' for a 'han' character (i.e. a character whose Mscript
       property is 'han') if the character has Mlanguage text property 'ja' in
       an M-text and the character is in the repertories of such fonts.
       Otherwise, try a font of registry 'gb2312.1980-0' or 'big5-0'. If that
       'han' character does not have Mlanguage text property, try all three
       fonts.

       See the function mdraw_text() for the detail of how a font is selected.


COPYRIGHT

       Copyright (C) 2001 Information-technology Promotion Agency (IPA)
       Copyright (C) 2001-2009 National Institute of Advanced Industrial
       Science and Technology (AIST)
       Permission is granted to copy, distribute and/or modify this document
       under the terms of the GNU Free Documentation License
       <http://www.gnu.org/licenses/fdl.html>.

                                  15 Oct 2009                    mdbFontset(5)

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