NAME¶

SDL_HintCallback - A callback used to send notifications of hint value changes.

HEADER FILE¶

Defined in SDL3/SDL_hints.h

SYNOPSIS¶

#include "SDL3/SDL.h"

typedef void(SDLCALL *SDL_HintCallback)(void *userdata, const char *name, const char *oldValue, const char *newValue);

DESCRIPTION¶

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.

FUNCTION PARAMETERS¶

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.

THREAD SAFETY¶

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.

AVAILABILITY¶

This datatype is available since SDL 3.1.3.

SEE ALSO¶

•(3), SDL_AddHintCallback(3)