Re: need help in using a 10646 font with cp1251 text

[Oliver Scholz]

Eli Zaretskii <eliz@elta.co.il> writes:

>> From: Ted Zlatanov <tzz@lifelogs.com>
>> Newsgroups: gnu.emacs.help
>> Date: Wed, 06 Aug 2003 16:30:21 -0400
>> 
>> What can I do to get the 8859-5 charset obtained from the cp1251
>> encoding displayed as a UCS charset?  I don't want to install a 8859-5
>> font.
>
> Try using code-pages.el.  You didn't say what version of Emacs you
> use, so I don't know whether it has code-pages.el bundled.  If not,
> you can find it either in the Emacs CVS or (I think) on
> gnu.emacs.sources.

I just ask out of curiosity: I don't know anything about cyrrillic,
but from a quick glance it seems that the order of cyrillic characters
is the same in UCS and in ISO 8859-5. So wouldn't it be an option to
do some simple transposing for font encoding, like [only slightly
tested]:

(define-ccl-program tz-8859-5-to-ucs
  `(0
    ;; In: r0 = charset-id; r1 = position code
    ;; Out: r1 = 1st octet; r2 = 2nd octet in UCS-2 as the font
    ;; encoding.
    ((if (r0 == ,(charset-id 'cyrillic-iso8859-5))
    ;; Transpose chars from the cyrillic charset by #x3E0.
         ((r1 += #x3e0)
          (r2 = r1)
          (r1 = (r1 >> 8))
          (r2 &= #xff))
       ;; Everything else: business as usual.
       (call ccl-encode-unicode-font)))))

(push '("ISO10646-1" . tz-8859-5-to-ucs)
      font-ccl-encoder-alist)

(setq font-ccl-encoder-alist '(("ISO10646.*-*" . tz-8859-5-to-ucs)))

(set-fontset-font "fontset-ADJUSTTHIS" 'cyrillic-iso8859-5
                  "-misc-fixed-medium-r-*-*-*-140-*-*-*-*-ISO10646-1")


Or is this too kludgy?

    Oliver
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