Piorjade

The most efficient way that I know of would probably be double buffering. (The reason for that being the fact that direct GPU calls like set or setForeground take a certain amount of time depending on the tier and a good double buffering API has an algorithm that minimizes the amount of GPU calls)
On the other hand I don't know if that's actually necessary for a text editor.

I'm not interested in reading up posts which consist of passive-aggressive comments from the person that created the thread as you seemed not to appreciate the help of others and just cry and complain constantly.
 
Yes I know but the way I understood your tears that I skimmed over I thought you didn't like the fact that the library he gave you only has one buffer and you thought it was a "bug" at first that you had to reboot or something like that.
 
What? The comment you quoted doesn't really clear up or negate what I've said. My comment you've quoted is basically the answer for your quote.
 
Anyway, you don't seem like a person someone can talk to normally. You don't seem to appreciate help from others other than using a solution but still crying about something and answering other posts that don't fit your expectations with passive-aggressive comments so I'm done with you. 
I recommend you not to post anything on this forum if you plan on being stubborn.

From what I understand you're on the right path. What I think* you're missing is a grouping algorithm. Iterate the table for like-pixels chunks by fore/background color and character to draw together. This should result in less gpu calls overall. I'm working on something similar

I tried to translate it into german, but fucked the script up. I think i translated the wrong values/strings.