[osg-users] New glTexStorage code is disrupting FBO initialization

[Glenn Waldron]

Julian,
New information: In osgEarth we use Camera::attach like so:

   rttCamera->attach(osg::Camera::COLOR_BUFFER0, texture);

If I replace COLOR_BUFFER0 with COLOR_BUFFER, it works. Been using the
former since forever but maybe it was wrong.

Glenn Waldron


On Fri, Aug 10, 2018 at 12:39 PM Julien Valentin <julienvalentin51 at gmail.com>
wrote:

> Hi
> It's weird that immutable texture interact with fbo render to texture.
> I've done a lot of FBORTT since this commit and haven't seen any problem
> Are you sure your problem come from here?
> Try to replicate the behavior in a simple example code please
>
> Cheers
>
>
> gwaldron wrote:
> > Robert,
> >
> >
> > We recently pulled the latest master branch of OpenSceneGraph, and found
> that FBOs in osgEarth no longer initialize properly. We narrowed the
> problem down to this commit which appears to introduce the usage of
> glTexStorage:
> >
> >
> >
> https://github.com/openscenegraph/OpenSceneGraph/commit/7be09e8dcd1ed63eb501c12bb7c8df6f6902783b
> (
> https://github.com/openscenegraph/OpenSceneGraph/commit/7be09e8dcd1ed63eb501c12bb7c8df6f6902783b
> )
> >
> >
> > We are seeing output like the following.
> >
> >
> > RenderStage::runCameraSetUp(), FBO setup failed, FBO status= 0x8cd6
> >
> > Warning: RenderStage::runCameraSetUp(State&) Pbuffer does not support
> multiple color outputs.
> > ContextData::incrementContextIDUsageCount(0) to 2
> > Warning: detected OpenGL error 'invalid enumerant' after applying
> attribute Viewport 000002517C076560
> > RenderStage::runCameraSetUp(), FBO setup failed, FBO status= 0x8cd6
> > Warning: RenderStage::runCameraSetUp(State&) Pbuffer does not support
> multiple color outputs.
> > ContextData::incrementContextIDUsageCount(0) to 3
> >
> >
> > The "osgprerender" example still seems to work but generates FBO
> warnings as well.  I have not had a chance for a deep-dive yet ... but
> wanted to make you aware.
> >
> >
> > Glenn Waldron / osgEarth
> >
> >  ------------------
> > Post generated by Mail2Forum
>
>
> ------------------------
> Twirling twirling twirling toward freedom
>
> ------------------
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=74485#74485
>
>
>
>
>
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