A callback used to send notifications of hint value changes.
Defined in <SDL3/SDL_hints.h>
typedef void(SDLCALL *SDL_HintCallback)(void *userdata, const char *name, const char *oldValue, const char *newValue);
userdata | what was passed as userdata to SDL_AddHintCallback(). |
name | what was passed as name to SDL_AddHintCallback(). |
oldValue | the previous hint value. |
newValue | the new value hint is to be set to. |
This is called an initial time during SDL_AddHintCallback with the hint's current value, and then again each time the hint's value changes.
This callback is fired from whatever thread is setting a new hint value. SDL holds a lock on the hint subsystem when calling this callback.
This datatype is available since SDL 3.0.0.