Reference Manual - 0.9.25
IDirectFBScreen   TestMixerConfiguration

Test mixer configuration.

TestMixerConfiguration (
  IDirectFBScreen   * thiz,
  int   mixer,
  const DFBScreenMixerConfig   * config,
  DFBScreenMixerConfigFlags   * ret_failed
);

If configuration fails and 'ret_failed' is not NULL it will indicate which fields of the configuration caused the error.