On Monday November 08 1999 at 09:51, Jonathan de Boyne Pollard wrote to MIKE
RUSKAI:

 JP> I used GpiCharStringPosAt(), but it is very slow when drawing a
 JP> single character at a time.  Unfortunately, I have to draw single
 JP> characters at a time when it is the case that successive characters
 JP> have different foreground and background colours.

I know this is outside your critera, but have you tried rendering your virtual 
buffer into a bitmap (using your own font rasterization routines) rather than
relying on GPI and a presentation space?

--- GoldED/2 3.0.1