sdlSetWindowOpacity function

int sdlSetWindowOpacity(
  1. Pointer<SdlWindow> window,
  2. double opacity
)

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 -1 if setting the opacity isn't supported.

\param window the window which will be made transparent or opaque \param opacity the opacity value (0.0f - transparent, 1.0f - opaque) \returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

\since This function is available since SDL 2.0.5.

\sa SDL_GetWindowOpacity

extern DECLSPEC int SDLCALL SDL_SetWindowOpacity(SDL_Window * window, float opacity)

Implementation

int sdlSetWindowOpacity(Pointer<SdlWindow> window, double opacity) {
  final sdlSetWindowOpacityLookupFunction = libSdl2.lookupFunction<
      Int32 Function(Pointer<SdlWindow> window, Float opacity),
      int Function(
          Pointer<SdlWindow> window, double opacity)>('SDL_SetWindowOpacity');
  return sdlSetWindowOpacityLookupFunction(window, opacity);
}