This is the file fdxfiles.txt of the CJK macro package ver. 4.8.5
(16-Oct-2021).
Extended font definition files
==============================
The CJK package modifies LaTeX's font loading mechanism to input an extended
font definition file (with suffix `.fdx') immediately after a normal font
definition file (with suffix `.fd') has been loaded. A `.fdx' file is
optional. Here a list of useful commands---note that neither whitespace nor
linebreaks produce output while macros are defined in such files, which is
quite convenient.
Immediately after selecting the proper subfont for a given input character,
the CJK package tests whether a macro
\<encoding>/<family>/<series>/<shape>/<plane>/<code>/<direction>
is defined. If it exists, it is executed instead of calling \CJKsymbol.
For halfwidth katakana, the macro is called
\<encoding>/<family>/<series>/<shape>/<code>/<direction>
For fonts from HLaTeX the macro is called
\<encoding>/<family>/<series>/<shape>/<byte1>/<byte2>/<direction>
For UTF-8, only characters in the range 0x800-0x10FFFF execute the test for
this macro.
<code>, <byte1> and <byte2> are decimal numbers; <direction> is either `v'
or `h'.
The following commands are intended for `.fdx' files:
o For vertical writing, \CJKvdef should be used to (globally) define the
macros described above. It always prepends `<encoding>/<family>/'.
Example from c00bsmi.fdx:
\CJKvdef{m/n/01/1}{\def\CJK@plane{v}\selectfont\CJKsymbol{4}}
This defines macro `\C00/bsmi/m/n/01/1/v': If glyph 1 in subfont `01'
(`bsmilp01' in this example) should be typeset, it is replaced with
glyph 4 from subfont `v' (`bsmilpv').
\CJKhdef is the equivalent for horizontal writing.
o Another macro is \CJKvlet, performing a global \let. Example (again
from c00bsmi.fdx):
\CJKvlet{bx/n/01/1}{m/n/01/1}
This makes `\C00/bsmi/bx/n/01/1/v' the same as `\C00/bsmi/m/n/01/1/v'.
\CJKhlet is the equivalent for horizontal writing.
CJKvert.sty provides additional macros:
o Glyphs which shouldn't be rotated are available with \CJKsymbolsimple.
Here an example from c10gbsn.fdx:
\CJKvdef{m/n/01/17}{\CJKsymbolsimple{17}}
If glyph 17 in subfont `01' (`gbsnlp01') is requested, it is replaced
with itself but unrotated.
o Some correction parameters are available to position glyphs of a given
font (i.e., all subfonts) while \CJKvert is active.
\CJKvdef{norotate}{}
The default of CJKvert.sty is to rotate all glyphs using the graphicx
package. If `norotate' is present in a `.fdx' file, glyphs accessed
with \CJKsymbol are not rotated. `fullheight', `height' and `offset'
are used only if `norotate' is not set.
\CJKvdef{fullheight}{<dimension>}
If defined, it sets the full height (height plus depth) of all CJK
glyphs accessed with \CJKsymbol to <dimension>. In most cases this
value is 1em.
\CJKvdef{height}{<dimension>}
If defined, it defines the height of all CJK glyphs accessed with
\CJKsymbol. Consequently, the depth is set to `fullheight - height'.
For example, the AFM file for `bsmilp01' gives 879 PS units for the
`Ascender' value. Since 1em is 1000 PS units, a proper value for
the `height' parameter is 0.88em.
\CJKvdef{offset}{<dimension>}
If defined, shift the (rotated) glyphs accessed with \CJKsymbol
vertically by <dimension>.
\CJKvdef{simpleoffset}{<dimension>}
If defined, shift all glyphs accessed with \CJKsymbolsimple vertically
by <dimension>.
o The `offset' parameter is available to position glyphs of a given
font (i.e., all subfonts) while \CJKhorz is active.
\CJKhdef{offset}{<dimension>}
If defined (and \CJKhorz being active), shift the glyphs accessed
with \CJKsymbol vertically by <dimension>.
---End of fdxfiles.txt---
