glDepthFunc function opengl
GLAPI void GLAPIENTRY glDepthFunc( GLenum func )
Implementation
void glDepthFunc(int func) {
  final glDepthFuncAsFunction = _glDepthFunc
      .cast<NativeFunction<Void Function(Uint32 func)>>()
      .asFunction<void Function(int func)>();
  return glDepthFuncAsFunction(func);
}