POV-Ray : Newsgroups : povray.windows : Double-byte font trouble : Re: Double-byte font trouble Server Time
28 Jul 2024 18:25:28 EDT (-0400)
  Re: Double-byte font trouble  
From: Ron Parker
Date: 25 Jan 1999 12:35:01
Message: <36acab45.0@news.povray.org>
On 25 Jan 1999 10:13:26 -0500, Ron Parker <par### [at] my-dejanewscom> wrote:
>You would need three high-bit characters in a row, the first one 
>has to be one of the sixteen characters that has a high nybble of 

>high nybble of $8 through $B. (mostly symbols of one form or 
>another, unlikely to be inside or at the end of a word, particularly
>in combination, though there are conceivable exceptions.)  Some of 
>the combinations thus formed might even be valid in the font you're 
>using (particularly if you're using a Unicode font on NT, most of 
>which include Arabic and Hebrew script.)

Erg.  It's worse than I thought.  You can also have sequences of
two high-bit characters, where the first has a high nybble of
0xC or 0xD and the second has a high nybble of 0x8 through 0xB.
These combinations encode characters in the range 0x80 through
0x7ff, which includes the entire set of high-bit characters.  
So if you use a character from the range 0xC0 through 0xC3 


trademarks of e.g. Spanish words!), you're guaranteed to have a 
valid UTF-8 representation for a character that's probably 
represented in your font.  

Maybe I need to add a "charset" keyword with allowed values of 
US-ASCII, ISO-8859-1, UTF-8, and ISO-10646-UCS-2 with a default 
of ISO-8859-1.  (All of these are IANA names for the various
charsets, so don't blame me for the huge name UCS-2 has. :) )

Any thoughts? Anyone? Does anyone but me and Jon care anymore?


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