I made my code independent of the video buffer. All is computed in "Virtual" buffers at a fixed width/height and then scaled to fit the screen (Rotozoom module). So I don't see any issue with maths.

In the meantime, I was able to observe the same behavior as you reported (time to time resizing works, time to time resizing crashes with a message, and time to time resizing crashes without any error message). It is then quite difficult to investigate, as the result may vary between tries.

I really hope you will find something with your tests. And even if you don't, thanks again for your time ;)

Update

I've tried the opengl example from the Examples folder of the SDL installation (reason: it seems to uses opengl instead of DirectX) and allowed the window to be resized. Result: I can change the size without any issue (note that the image is not resized along with the window, but I don't think it does matter, doesn't it?).

In reply to Re^6: SDL/SDLx issue with application resizing by Garden Dwarf
in thread SDL/SDLx issue with application resizing by Garden Dwarf

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