dummy (or not) question about AllocateWindow ()

Carlos Eduardo Rodrigues Diógenes cerdiogenes at yahoo.com.br
Sun Jun 25 05:44:39 PDT 2006


In AllocateWindow () from dix/window.c what this line does:

ppriv = (DevUnion *)(pWin + 1);

It's after the first *if* of the function.

I can't realize this operation. This appear to cast the XID (the 4th
byte) in DrawableRec (the first struct in _Window) to a DevUnion and
then make the devPrivate point to the same place.

Can anybody explaim this? For what is this done?

Carlos Eduardo Rodrigues Diógenes
Projeto xLupa - http://www.unioeste.br/projetos/xlupa

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