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SDL_GetWindowOpacity

sdl_sys_bindgen

Function SDL_GetWindowOpacity 

Source 
pub unsafe extern "C" fn SDL_GetWindowOpacity(
    window: *mut SDL_Window,
) -> f32
Expand description

Get the opacity of a window.

If transparency isn’t supported on this platform, opacity will be returned as 1.0f without error.

Parameter: window the window to get the current opacity value from. Returns: the opacity, (0.0f - transparent, 1.0f - opaque), or -1.0f on failure; call SDL_GetError() for more information.

Thread Safety: This function should only be called on the main thread.

Available Since: This function is available since SDL 3.2.0.

See Also: SDL_SetWindowOpacity