Man page - sdl_addhintcallback(3)

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SDL_AddHintCallback(3)

SDL3 FUNCTIONS

SDL_AddHintCallback(3)

SDL_AddHintCallback - Add a function to watch a particular hint.

Defined in SDL3/SDL_hints.h

#include "SDL3/SDL.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.