[−][src]Function ul_sys::ulSurfaceGetUserData
pub unsafe extern "C" fn ulSurfaceGetUserData(surface: ULSurface) -> *mut c_void
Get the underlying user data pointer (this is only valid if you have set a custom surface implementation via ulPlatformSetSurfaceDefinition).
This will return nullptr if this surface is the default ULBitmapSurface.