Reference Manual - 1.0.1
IDirectFBScreen   GetOutputDescriptions

Get a description of available outputs.    得到一个可用的输出描述符

GetOutputDescriptions (
  IDirectFBScreen   * thiz,
  DFBScreenOutputDescription   * ret_descriptions
);

All descriptions are written to the array pointed to by ret_descriptions. The number of outputs is returned by IDirectFBScreen::GetDescription().

所有设置描述符写到数组指针去用ret_descriptions,使用编码器返回用IDirectFBScreen::GetDescription().

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