Function sdl2_sys::SDL_SetWindowBrightness

pub unsafe extern "C" fn SDL_SetWindowBrightness(
    window: *mut SDL_Window, 
    brightness: f32
) -> c_int

\brief Set the brightness (gamma correction) for a window.

\return 0 on success, or -1 if setting the brightness isn't supported.

\sa SDL_GetWindowBrightness() \sa SDL_SetWindowGammaRamp()