DirectFB Reference Manual
IDirectFB   EnumDisplayLayers

Enumerate all existing display layers.

EnumDisplayLayers (
  IDirectFB *thiz
  DFBDisplayLayerCallback callback
  void *callbackdata
);

Calls the given callback for all available display layers. The callback is passed the layer id that can be used to retrieve an interface on a specific layer using IDirectFB->GetDisplayLayer().

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