> some basic knowledge still. Below is what I have tried to do.
Thanks for your try.
> I took the c42*.fdx files from the JIS subdir of CJK, modified them
> to become c70*.fdx (minor editing) and put them with the c70*.fd in
> the UTF8 subdir.
This is not sufficient; see below.
> I was under the assumption that in the .fdx file the initial
> \CJKvdef{rotate}{} command would use the graphicx package to do
> rotation automatically on *all* characters, and that only desired
> exceptions to this general rule would be given after that command
> (using \CJKsymbolsimple for instance).
Yes.
> As such, use of the .fdx file requires the .fd file to be read also,
> right?
It's the other way round: The CJK package modifies some internal LaTeX
commands to make a .fdx file be read if available.
> But I cannot see where the plane and code points are needed in
> either file unless exceptions are specified in the .fdx file.
This is the very magic done by the CJK package: It hides the plane and
code point handling completely from the user.
> Next, in the file below, I see exceptions written for glyphs in
> plane "sy", which would be a special name for something in DNP
> encoding, right?
Yes. The mapping for the DNP subfont layout is given in file
JISdnp.enc which contains this, for example:
[EMAIL PROTECTED]@[EMAIL PROTECTED]
This means that the first-byte code 0xA1 of JIS encoding is mapped to
the `sy' font, and that CJK should subtract 160 of the second-byte
code to get the proper glyph index in that subfont. The `A1'
parameter has to be used in the [EMAIL PROTECTED]' macro only, to specify
the used exception list in punctuation tables defined by the
[EMAIL PROTECTED] and [EMAIL PROTECTED] macros (in file CJK.enc). With other
words, JIS code 0xA1A1 is mapped to glyph index 1 in subfont `sy'.
> I assume this is what you meant when you said the translation
> involved "replacing the subfonts and glyph indices with the Unicode
> pendants".
Yes. The subfonts for Unicode encoded subfonts are always two
hexadecimal digits (and the glyph indices are different too, of
course), and all lines in the .fdx files which refer to glyphs must be
updated accordingly. BTW, it's probably easiest to look up the
correct mappings between DNP and JIS by checking the file DNP.sfd;
mappings between JIS and Unicode are given elsewhere. Have a look
into file makeuniwada.pl which I've written to create Unicode encoded
subfonts for the Wadalab fonts.
Werner
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