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Extended ASCII and the New Unicode Text

by Eric Armstrong · in Torque Game Builder · 10/02/2006 (9:00 pm) · 1 replies

I'm having an issue with rendering text containing extended ASCII characters. The specific character I'm attempting to write is the Registered Trademark symbol. ASCII code 174 - (R) - I can't put the actual symbol, since GG ate my post when I did.

Anyway... let me type this again...

I traced through the code, and the character is displaying fine in the debugger until the rendering code attempts to convert the UTF8 to a UTF32. In unicode.cc within method oneUTF8toUTF32, after halving the char value, and using that as a look up in an array, that array returns 0, which causes the character to be marked invalid, so it doesn't get displayed...

I don't really know enough about Unicode and the conversion that is going on to fix this. Does anyone out there know enough about this code to point me in a direction that may lead to a solution?

Any help would be appreciated...

Thanks,
Eric Armstrong
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Torque Owner David Barr
Viola Interactive Ltd
#1
10/07/2006 (4:33 pm)
Eric

Try removing the UNICODE define and then adding this (from a post I made elsewhere)

When unicode is not defined, extended ascii chars are not displayed correctly in gui controls.

I think I have tracked this down to a call to dglDrawTextN in dgl.cc where the text to be drawn is converted from UTF8 to UTF16 regardless of whether unicode is defined or not.

Around line 514 you have :

FrameTemp<UTF16> ubuf(dStrlen(str) + 1);
convertUTF8toUTF16(str, ubuf, dStrlen(str) + 1);


if you change this to :

#ifdef UNICODE
FrameTemp<UTF16> ubuf(dStrlen(str) + 1);
convertUTF8toUTF16(str, ubuf, dStrlen(str) + 1);
#else
FrameTemp<UTF8> ubuf(dStrlen(str) + 1);
dSprintf( ubuf, dStrlen(str) + 1, "%s", str );
#endif


then extended ascii chars display correctly.