sdlGetWindowOpacity function

int sdlGetWindowOpacity(Pointer<SdlWindow> window, Pointer<Float> outOpacity)

Get the opacity of a window.

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

The parameter opacity is ignored if it is NULL.

This function also returns -1 if an invalid window was provided.

\param window the window to get the current opacity value from \param out_opacity the float filled in (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_SetWindowOpacity

extern DECLSPEC int SDLCALL SDL_GetWindowOpacity(SDL_Window * window, float * out_opacity)

Implementation

int sdlGetWindowOpacity(Pointer<SdlWindow> window, Pointer<Float> outOpacity) {
  final sdlGetWindowOpacityLookupFunction = libSdl2.lookupFunction<
      Int32 Function(Pointer<SdlWindow> window, Pointer<Float> outOpacity),
      int Function(Pointer<SdlWindow> window,
          Pointer<Float> outOpacity)>('SDL_GetWindowOpacity');
  return sdlGetWindowOpacityLookupFunction(window, outOpacity);
}