When a renderer is created, vsync defaults to SDL_RENDERER_VSYNC_DISABLED.
The vsync parameter can be 1 to synchronize present with every vertical
refresh, 2 to synchronize present with every second vertical refresh, etc.,
SDL_RENDERER_VSYNC_ADAPTIVE for late swap tearing (adaptive vsync), or
SDL_RENDERER_VSYNC_DISABLED to disable. Not every value is supported by
every driver, so you should check the return value to see whether the
requested setting is supported.
Toggle VSync of the given renderer.
When a renderer is created, vsync defaults to SDL_RENDERER_VSYNC_DISABLED.
The vsync parameter can be 1 to synchronize present with every vertical refresh, 2 to synchronize present with every second vertical refresh, etc., SDL_RENDERER_VSYNC_ADAPTIVE for late swap tearing (adaptive vsync), or SDL_RENDERER_VSYNC_DISABLED to disable. Not every value is supported by every driver, so you should check the return value to see whether the requested setting is supported.