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w0dk4

Detect/Prevent forced AA through driver

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Hey there,

my problem is that I am coding a deferred renderer on Direct3D9 and when you force Anti Aliasing through the driver, nothing gets rendered for obvious reason,

Is there a best practice to prevent this behaviour? Or if it is not possible to prevent, how could I detect if AA is forced?
Direct3D does not seem to throw any errors...
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If you're trying to fight against the driver, you are going to lose. Big games get NVIDIA and AMD to dial exceptions in specifically for them, but obviously that's not an option for you. That said, the driver has to store the setting [i]somewhere[/i] so I imagine it should be possible to at least detect it and warn the user. There's unlikely to be a consistent and reliable way to go about it, though.
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So there is no *proper* way to detect this? [img]http://public.gamedev.net//public/style_emoticons/default/sad.png[/img]

How do other games do this then that use deferred rendering? Or if you have developed a deferred renderer, do you care about this / have you implemented something that works well?
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When you say "nothing gets drawn", surely some D3D calls fail which you can detect?

Or what about using GetPresentParameters() on your swap chain - does that say the backbuffer is antialiased (I suspect no if the driver is doing it)?
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[quote name='Evil Steve' timestamp='1328895770' post='4911727']
Or what about using GetPresentParameters() on your swap chain - does that say the backbuffer is antialiased (I suspect no if the driver is doing it)?
[/quote]
Just tested this and it's a "no", unfortunately (at least on AMD, haven't tested NV yet, probably won't bother as a hardware-independent way is obviously a high preference here). GetDesc on the backbuffer might be another option (just occurred to me, haven't tested yet).
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