http://www.directfb.org
index.html
DirectFB Reference Manual
IDirectFBDisplayLayer.html
IDirectFBDisplayLayer
GetLevel
Get the current display layer level.
GetLevel (
IDirectFBDisplayLayer.html
IDirectFBDisplayLayer
*
thiz,
int
*
ret_level
);
The level describes the z axis position of a layer. The primary layer is always on level zero unless a special driver adds support for level adjustment on the primary layer.  Layers above have a positive level, e.g. video overlays.  Layers below have a negative level, e.g. video underlays or background layers.
