Get the swap interval for the current OpenGL context.
int SDL_GL_GetSwapInterval(int *interval);
|interval||Output interval value. 0 if there is no vertical retrace synchronization, 1 if the buffer swap is synchronized with the vertical retrace, and -1 if late swaps happen immediately instead of waiting for the next retrace|
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
If the system can't determine the swap interval, or there isn't a valid current context, this function will set *interval to 0 as a safe default.
This function is available since SDL 3.0.0.