Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[Robert Osfield]

HI Nikolay,

The OSG's detection of glTexStorage2D is currently based on checking
whether the function pointer is available in the driver, if it's available
the OSG assumes it can be used.  So perhaps the driver has the function but
doesn't actually support it on the hardware you are using.  Coulld you post
the output to glewinfo?

Could you try setting the env var OSG_GL_TEXTURE_STORAGE to OFF to tell the
OSG to override the enabling of glTexStorage2D.

Robert.

On 17 November 2015 at 20:55, Nikolay Kasyanov  wrote:

> This is weird: glewinfo reports that glTexStorage2D extension is absent on
> my mahine, but OSG still thinks it's there. Any ideas?
>
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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[Nikolay Kasyanov]

This is weird: glewinfo reports that glTexStorage2D extension is absent on my 
mahine, but OSG still thinks it's there. Any ideas?

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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[Nikolay Kasyanov]

I found the commit that triggered this bug: 
9bb2cfd3d4e4a08628ca8c49a2e6c061fe143fb8 (check it out on OSG's github mirror 
at /openscenegraph/osg, I can't post urls yet, unfortunately)

Bug can be easily reproduced using current master of OpenMW (/openmw/openmw on 
GitHub) on OS X (at least 10.10 & 10.11 are affected with Intel GPU, still not 
sure about other).

Continuing discussion here since submission thread is not the right place for 
bug reports.

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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[David Guthrie]

I did do a diff between 3.2.1 in Texture and Texture2D, but there are so many 
changes it got muddy.  I have a lot to do before next week, so unless someone 
else finds it before then, I'll just have to stick with what I have until then.

Thank you all for the quick replies.
David

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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[Trajce Nikolov NICK]

Hi David,

we faced the same issues on Mac, and my colleague found a fast work
around, not the fix though. If this is with dds textures, then in
ReaderWriterDDS.cpp put the following line into comment:

 // if (mipmap_offsets.size()0) osgImage-setMipmapLevels(mipmap_offsets);

We are investigating this as time allows us, will keep this thread updated
if we find something

Nick

On Thu, May 28, 2015 at 3:52 PM, David Guthrie dguth...@alionscience.com
wrote:

 Hello everyone,

 I started upgrading delta3d to use osg 3.3.x, but I ran into a strange
 problem that that seems like it must be something that changed in the
 osg::Texture code, thought it only manifests on OS X.  The texture is
 setting compressed mode, I think it turns on mip mapping correctly, and it
 ends up calling extensions-glCompressedTexSubImage2D().

 The only reason I think it has to be in this code, is that I tried it with
 an ive file that has compressed textures.  Those load straight into the
 image object from the ive file, and into the Texture2D.

 I can export the textures from the ive, and read them in an image tool,
 and I can load the ive and works fine on Windows.  In case you get the
 wrong idea, I have an application with many different file formats and both
 extrernal and embedded textures.  Not a single compressed image we have
 will load properly on OS X, but they all work on in OSG 3.2.1.

 Any thoughts would be appreciated!

 Thanks,
 David

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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[David Guthrie]

Hey,

You are a lifesaver. I took it out in the ive plugin as well, and between the 
two, all my textures came back. 

Thank you!

Cheers,
David

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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[Trajce Nikolov NICK]

Thanks Robert,

these are good hints !

Nick

On Thu, May 28, 2015 at 5:32 PM, Robert Osfield robert.osfi...@gmail.com
wrote:

 Hi Guys,

 On 28 May 2015 at 16:17, David Guthrie dguth...@alionscience.com wrote:
  You are a lifesaver. I took it out in the ive plugin as well, and
 between the two, all my textures came back.

 Reading this exchange, it sounds like provision of mipmaps is somehow
 broken with OSX  OSG svn/trunk.  It would be worth looking at changes
 to OpenSceneGraph/src/osg/Image.cpp, Texture.cpp and Texture2D.cpp.
 It could be that a GL extension is broken under OSX, or something on
 the OSG side that isn't working as intended, with the error only being
 picked up under OSX.

 I'm afraid I don't have an hunch as to what it might be though.

 Robert.
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Re: [osg-users] OS X (10.9) Texture2D with hardware compression results in no texture data.

[Robert Osfield]

Hi Guys,

On 28 May 2015 at 16:17, David Guthrie dguth...@alionscience.com wrote:
 You are a lifesaver. I took it out in the ive plugin as well, and between the 
 two, all my textures came back.

Reading this exchange, it sounds like provision of mipmaps is somehow
broken with OSX  OSG svn/trunk.  It would be worth looking at changes
to OpenSceneGraph/src/osg/Image.cpp, Texture.cpp and Texture2D.cpp.
It could be that a GL extension is broken under OSX, or something on
the OSG side that isn't working as intended, with the error only being
picked up under OSX.

I'm afraid I don't have an hunch as to what it might be though.

Robert.
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