sdlGetSurfaceAlphaMod function

int sdlGetSurfaceAlphaMod(Pointer<SdlSurface> surface, Pointer<Uint8> alpha)

Get the additional alpha value used in blit operations.

\param surface the SDL_Surface structure to query \param alpha a pointer filled in with the current alpha value \returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

\since This function is available since SDL 2.0.0.

\sa SDL_GetSurfaceColorMod \sa SDL_SetSurfaceAlphaMod

extern DECLSPEC int SDLCALL SDL_GetSurfaceAlphaMod(SDL_Surface * surface, Uint8 * alpha)

Implementation

int sdlGetSurfaceAlphaMod(Pointer<SdlSurface> surface, Pointer<Uint8> alpha) {
  final sdlGetSurfaceAlphaModLookupFunction = libSdl2.lookupFunction<
      Int32 Function(Pointer<SdlSurface> surface, Pointer<Uint8> alpha),
      int Function(Pointer<SdlSurface> surface,
          Pointer<Uint8> alpha)>('SDL_GetSurfaceAlphaMod');
  return sdlGetSurfaceAlphaModLookupFunction(surface, alpha);
}