I’ve read the deoxygen doc, on which there is only an example for drawing a line (I tried it and that works)
I read that COffscreenContest is not working the same n 4.x than in 3.6, but without more explanation or sample (just saying it’s no use for reducing flicker, but that’s not my purpose)
Maybe there is an other document, but I didn’t find it (I’m searching around since a few days though)
Best
Xavier