
There is a function wich do not correctly set XSetFunction to GXcopy, but I did not find which one. So Reset to GXcopy after each modification, it's a bit overkill but it's prevent black square on screen.
There is a function wich do not correctly set XSetFunction to GXcopy, but I did not find which one. So Reset to GXcopy after each modification, it's a bit overkill but it's prevent black square on screen.