Hello,

I came along with some problems with the GRAPH unit (1.0.4 / Linux):

- The command ClearViewPort doesn't set the Position to 0,0.
- Outtext doesn't handle international characters correctly
- And CloseGraph doesn't reset the Console correctly.

Andreas K. Foerster wrote

- The command ClearViewPort doesn't set the Position to 0,0.

Fixed.

- Outtext doesn't handle international characters correctly

I'm not sure what the problem is here, I believe Sebastian Günther implemented some things for this.

- And CloseGraph doesn't reset the Console correctly.

This should be fixed already in the snapshots.

Jonas

Yes. The old Borland fonts use codepage 437, while Linux uses ISO8859-1 (a.k.a. ANSI charset) as default charset. So when you try to print Umlaute etc. which display correctly in the source on Linux, you will get wrong results.

Some time ago I've added the possibility to specify a translation table. This table is a variable called GraphStringTransTable, and a translation table for ISO8859-1 to CP437 is already included in the graph unit. To enable this translation, just add this line to the initialization code of the application:

GraphStringTransTable := @AnsiToASCIITransTable;

- Sebastian

I came along with some problems with the GRAPH unit (1.0.4 / Linux): - The command ClearViewPort doesn't set the Position to 0,0.

Okay, I set it myself. :-\

- Outtext doesn't handle international characters correctly

Now I found that there is already a translation table, which just has to be activated by:

GraphStringTransTable := @AnsiToASCIITransTable;

You really should put that into the manual!

BTW. the naming is not correct, because /both/ charsets are based on ASCII and it's not translated to /pure/ ASCII.

- And CloseGraph doesn't reset the Console correctly.

That's still a problem.

Another fault in the docs: the functions "InstallUserDriver" and "RegisterBGIDriver" are explained as if they were implemented.

I know, but in the usual speech Ansi is the Windows/Linux charset (ISO8859-1, more or less), and ASCII the old DOS charset. Microsoft would name this "AnsiToOEMTransTable". Correct would be "ISO8859_1ToCP437TransTable". Not very nice names either.

- Sebastian

It's also called IBM charset.
So why not "AnsiToIBMTransTable"?

"Andreas K. Foerster" wrote

It's also called IBM charset. So why not "AnsiToIBMTransTable"?

or, AnsiToDOSTransTable...
There are countless possibilities. What are the opinions of other core members about this issue?

- Sebastian

Date sent: Tue, 20 Nov 2001 10:55:47 +0100
From: Sebastian Günther
To:
Subject: Re: [fpc-devel]Re: GRAPH Unit for linux - Problems Send reply to:

I don't mind very much myself, except that I find my OS/2 "somewhat" ;-) different from DOS, although it uses absolutely the same default codepages (e.g. CP 852 here, and CP 850 for western Europe), so I don't think AnsiToDos* would be very accurate. ;-)

Tomas