[BRLTTY] Braille coding in Gnopernicus
Bill Haneman
Bill.Haneman at Sun.COM
Thu Nov 24 12:57:52 EST 2005
Hi Jan:
I am taking the liberty of CC-ing the GAP list again.
I have an idea what the problem is here, and a possible solution (below).
Jan Buchal wrote, on the BrlTTY list
>Hello,
>
>I'm not sure if my email is not of topic in this list but I asked in
>GAP list already and I am not sure if the problem is solved.
>
>So, I would like use Gnopernicus with brltty's api with ISO-Latin2 or
>better UTF-8 characters. One man from gap said that gnopernicus works in
>utf-8 but actually the braille display shows ISO1 only. Where is
>problem, how can I do?
>
>
I think there are two problems. One is that although gnopernicus uses
UTF-8 almost everywhere, it does its own braille dot conversions. So it
can't pass UTF-8 on to BrlAPI at the moment, with its current architecture.
The other problem is that currently, unless I am mistaken, gnopernicus'
braille tables are 8 bit tables, and gnopernicus always assumes Latin-1.
Latin-2 is also 8-bit, so in theory the current gnopernicus architecture
could handle this, but it would need to know when to convert from UTF-8
to Latin-2 instead of UTF-8 to Latin-1. I am not even totally sure that
gnopernicus is converting from UTF-8 to Latin-8 now, before it does a
braille table lookup, but it probably should be.
If gnopernicus had a Latin-2 table that worked for your locale, then I
think we could solve the problem by including the "character set" in the
braille table, at the top, and making sure gnopernicus did the correct
UTF-8 to 8-bit conversion for the given table before doing a character
lookup. From there on, the correct dots should be sent to BrlAPI.
Remus, please correct me if I have this wrong.
A better solution long-term would not be limited to an 8-bit braille
table lookup, but this is the sort of thing 'gnome-braille' attempts to
handle.
regards,
Bill
>Thanks.
>
>
More information about the BRLTTY
mailing list