SDL_GetWindowSurfaceVSync - Man Page

#include <SDL3/SDL_video.h>

bool SDL_GetWindowSurfaceVSync(SDL_Window *window, int *vsync);

window

the window to query.

vsync

an int filled with the current vertical refresh sync interval. See SDL_SetWindowSurfaceVSync() for the meaning of the value.

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

This function should only be called on the main thread.

This function is available since SDL 3.2.0.

SDL_SetWindowSurfaceVSync(3)

SDL_SetWindowSurfaceVSync(3).