[Jtsummers]

It's been a while (over a decade now), but I think SDL allows you to leave the contents on the screen if you don't call the clear function before you render new content. I don't know how well that'd work with resizing a window though.

[qsera]

I think it works like that if acceleration is no enabled. But even then I think it does not work reliably..I might be missing something though.