MacOS X 10.15.6, SDL 2.0.12.
I am using SDL_SetEventFilter() to take over window-redraw in real-time while a window is being resized (bottom-right corner window drag-resize). Originally the window would go black during the resize but that functionality was “fixed” in a fairly recent SDL2 update. That behavior was switched to auto-stretch window-content, which I cannot turn off. My call to SDL_SetEventFilter() is fighting the built-in stretch-to-fit automatic window redraw while it it being resized.
My manual redraw, called using SDL_SetEventFilter(), works fine but the result flashes between the internal stretch and my own redraw:
struct rAtt *DrawScreen(struct rAtt *, struct rAtt *, struct g *);
int
filterEvent(void *userdata, SDL_Event *event) {
if(event->type == SDL_WINDOWEVENT && event->window.event == SDL_WINDOWEVENT_RESIZED) {
DrawScreen((struct rAtt *)NULL, (struct rAtt *)NULL, (struct g *)userdata);
return(0);
}
//important to allow all events, or your SDL_PollEvent doesn't get any event
return(1);
}
Called via:
SDL_SetEventFilter(filterEvent, (void *)g);
Is there a mechanism that turns off the default resize action in SDL2?