Updated DIB Engine

[Roderick Colenbrander]

> 2009/1/27 Massimo Del Fedele <max at veneto.com>:
> > Any opinion about this one ? Could it be a good candidate for inclusion
> > in wine tree ?
> 
> Hi,
> 
> I have used this with StarCraft, running it with and without the DIB
> engine enabled. I find the environment variable makes it very easy to
> switch between them during testing, so I am for this (as well as being
> able to set the default option via the registry).
> 
> My experience with the game is that it is actually slower and has a
> noticible stutter when compared to the non-DIB engine version. This
> does not mean that I am opposed to this going in, as I know that the
> blitting code is not yet optimised. In fact, I am for this to go in
> (provided that Alexandre accepts it).
> 

In the end a dib engine will help a bit for StarCraft but for StarCraft the only proper way for hardware acceleration is to use the ddraw-gl backend in combination with the right rendertargetlockmode. Some games can really use a DIB engine though and that are games like Age of Empires I and II. Though in combination with a DIB engine more changes are needed for optimal performance (e.g. allow the DIB engine to directly draw into a ddraw surface without a memcpy)

Roderick
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