Function sdl2_sys::SDL_SetWindowOpacity

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

\brief Set the opacity for a window

\param window The window which will be made transparent or opaque \param opacity Opacity (0.0f - transparent, 1.0f - opaque) This will be clamped internally between 0.0f and 1.0f.

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

\sa SDL_GetWindowOpacity()