[osg-users] INVALID_OPERATION with compressed textures with mipmaps in OSG 3.4.0

[Trajce Nikolov NICK]

Hi Scott,

I am experiencing this issue on OSX .. Can you submit a patch/fix to test
it against the problematic models I have?

Thanks a bunch!

Nick

On Thu, Sep 24, 2015 at 4:18 PM, Davis, Timothy S CTR comnavairsyscom <
timothy.s.davis.ctr at navy.mil> wrote:

> Robert
>
> I'd agree that I'm dealing with a driver bug.  I'm just not sure what the
> bug is.  I think we are working in a underspecified area of OpenGL when
> dealing with mipmap levels smaller than the compression block size.
> However, I know that my driver generates 2x2 and 1x1 mipmaps for hardware
> generated compressed textures and this would suggest that it should happily
> work with these levels.
>
> I don't agree that it is unrelated to the OSX driver issue.  Certainly the
> drivers are different and the symptoms may be different.  But they both
> appear to touch the same question; what happens with mipmaps smaller than
> the block size.  I don't have access to an OSX machine however, so I cannot
> investigate this claim further.
>
> I have not tried different driver/hardware/OS combinations.  I'd agree
> that this would be useful, but I'm somewhat limited in how far I can go
> with this.
>
> I'd agree that a change to the core OSG is not warranted at this time.
> The models that cause the problem are not distributable.  I may continue to
> try and create a model that has the issue as time permits.
>
> Scott
>
>
>
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>
>


-- 
trajce nikolov nick
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