[osg-users] Advice on how to best inject behavoir regarding FBOs

Jan Ciger jan.ciger at gmail.com
Sun Aug 9 05:31:15 PDT 2015

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On 09/08/15 10:30, Björn Blissing wrote:
> Hi Jan,
> I read the notice about the upcoming v0.7 release as well. My 
> understanding of their text is that the new DirectDriver model
> would NOT replace the current direct mode. Instead the DirectMode
> would be the fallback option for those with graphic cards which do
> not support the new DirectDriver model (ie. Nvidia Card before
> Kepler and AMD cards before GCN). So instead of extended mode and
> direct mode, we will have direct mode and DirectDriver mode. This
> is supported by the following reddit post by one of Oculus
> Engineers: 
> https://www.reddit.com/r/oculus/comments/3g4rk7/pc_sdk_07_coming_augus

that is not how I have read the notice, but you are right, they
aren't saying they are replacing the existing direct mode now that I
have re-read it.

The dropping of the extended mode is more problematic, because the
direct mode doesn't work on a lot of hardware, even desktop machines
with standalone Nvidia cards.

> And I suspect that the FBO solution is something that would be 
> present in the v0.7 release as well. So I still think a solution
> to the problem with initializing FBOs outside the 
> osg::RenderStage::CameraSetup function is needed.

That's possible, but difficult to know until the new version is out. I
do find it unfortunate that they are resorting to these types of hacks
that make the integration a complicated mess.


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