Function sdl2_sys::SDL_GetTextureAlphaMod

pub unsafe extern "C" fn SDL_GetTextureAlphaMod(
    texture: *mut SDL_Texture, 
    alpha: *mut Uint8
) -> c_int

\brief Get the additional alpha value used in render copy operations.

\param texture The texture to query. \param alpha A pointer filled in with the current alpha value.

\return 0 on success, or -1 if the texture is not valid.

\sa SDL_SetTextureAlphaMod()