SDL_AddHintCallback - Man Page

#include <SDL3/SDL_hints.h>

bool SDL_AddHintCallback(const char *name, SDL_HintCallback callback, void *userdata);

The callback function is called _during_ this function, to provide it an initial value, and again each time the hint's value changes.

name

the hint to watch.

callback

An SDL_HintCallback function that will be called when the hint value changes.

userdata

a pointer to pass to the callback function.

Returns true on success or false on failure; call SDL_GetError() for more information.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.

SDL_RemoveHintCallback(3)

SDL_HintCallback.3type(3), SDL_RemoveHintCallback(3).