SDL2: handle SDL_WINDOWEVENT_EXPOSED #624
Merged
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The next buffer might always contain garbage, and on X11 without
compositing the buffers will be damaged just by moving the window
partly offscreen, minimizing it, or putting another window
(partially) on top of it.
Handling
SDL_WINDOWEVENT_EXPOSED
is the only way to deal withthis without sending regular updates.
A few illustrations of the effect that this solves
when combined with aUIManager:setDirty("all")
in front. A mereSDL.SDL_RenderPresent(S.renderer)
in base comes close to fixing the problem but unfortunately doesn't completely.Moved outside display
Other window was on top