Message-Id: <m0znkBI-000S5VC@inti.gov.ar>
Comments: Authenticated sender is <salvador AT natacha DOT inti DOT gov DOT ar>
From: "Salvador Eduardo Tropea (SET)" <salvador AT inti DOT gov DOT ar>
Organization: INTI
To: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>, djgpp AT delorie DOT com,
        Mirek Prywata <Miroslaw DOT Prywata AT fuw DOT edu DOT pl>, djgpp AT delorie DOT com,
        robert DOT hoehne AT gmx DOT net
Date: Wed, 9 Dec 1998 11:10:16 +0000
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Subject: Re: RHIDE and consolefonts under Linux
References: <366DBC18 DOT 62DDA0E AT gmx DOT net>
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Reply-To: djgpp AT delorie DOT com

Eli Zaretskii <eliz AT is DOT elta DOT co DOT il> wrote:
 
> On Tue, 8 Dec 1998, Robert Hoehne wrote:
> 
> > The problem here is, that RHIDE uses internally hardcoded the
> > IBM (or PC??) character set for some special characters (like
> > the frame chars). This problem may occour also on DOS, but very
> > seldom, since there is in most cases the font installed, which
> > RHIDE expects.
> > 
> > Mayve I will find someday the time to learn a little bit more
> > about all that stuff so I can fix it (or someone else sends me
> > a patch for it :-)
> 
> One possible solution is to have an extra level of indirection between
> the characters written by the display code and the actual bytes that
> are sent to the screen.  Create a 256-element table, where the X-th
> element holds the byte to be sent to the screen when the display code
> wants to display a character whose 8-bit code is X.
> 
> You can initialize the table with "table[X] = X", and then change the
> mapping if the underlying codepage/display system doesn't support
> certain characters, such as IBM box-drawing characters.

Thanks but that's too slow. I managed to do it without needed to slow 
down the library. Currently the classes have 2 versions of the strings with 
special characters. One is the original (CP437) string and the other is the 
currently used copy. When the user choose another code page I translate the 
original string and put it in the currently used copy.
 
> The GNU `recode' program has one example of emulating box-drawing
> characters with ASCII characters.

I already did it for some russian code pages that completly lacks graphic 
characters, but I'm sure I can enhance it looking at this example, thanks.

SET 
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