Ugh... Qt4 porting

David Faure faure at
Mon May 16 14:57:35 BST 2005

On Monday 16 May 2005 15:58, Mosfet wrote:
> Lars wrote:
> >The math behind is trivial: Instead of the value being R directly, it's A*R. 
> >As long as you know it's premultiplied it should be trivial to adjust your
> >code to do the same effect.  
> Okay, so I was right.
> I don't even know if this deserves a response. This may be trivial to do this 
> but without conversion it's a second set of a whole crapload of code to me 
> and everyone else doing filters. "Doing it right" and natively using this 
> format would mean two versions of most everything that accesses a pixel. 

Sorry for the possibly stupid suggestion, but isn't it possible to have A=1
in the non-premultiplied case?

David Faure, faure at, sponsored by Trolltech to work on KDE,
Konqueror (, and KOffice (

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