Exception Handling with a "bad" ESP

Felix Nawothnig felix.nawothnig at t-online.de
Fri Jul 22 16:11:01 CDT 2005

Dimi Paun wrote:
>> We need to get rid of that seperation - either the DIB should be stored 
>> fully on X side (which would require to add some features to X) or fully 
>> on Wine side (by implementing a GDI renderer in Wine).
> You can't have it fully on the X side, since you need direct memory access

Direct memory access can be done using X11 SHM, no?

> (non-synchronized I might add) to the DIB data.

MSDN says:

Windows NT/2000/XP: You need to guarantee that the GDI subsystem has 
completed any drawing to a bitmap created by CreateDIBSection before you 
draw to the bitmap yourself. Access to the bitmap must be synchronized. 
Do this by calling the GdiFlush function. This applies to any use of the 
pointer to the bitmap bit values, including passing the pointer in calls 
to functions such as SetDIBits.

(and I assume they are talking to application developers, not to Wine 
devs... :)

Or is MSDN lying here?


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