Function SDL_SetWindowOpacity 

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

Set the opacity for a window.

The parameter opacity will be clamped internally between 0.0f (transparent) and 1.0f (opaque).

This function also returns false if setting the opacity isn’t supported.

Parameters

• window: the window which will be made transparent or opaque.
• opacity: the opacity value (0.0f - transparent, 1.0f - opaque).

Return value

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

Thread safety

This function should only be called on the main thread.

Availability

This function is available since SDL 3.2.0.

See also

• SDL_GetWindowOpacity