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<p>Hi Robert<br>
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<div class="moz-cite-prefix">On 21.08.2017 19:06, Robert Osfield
wrote:<br>
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<div class="gmail_quote">You should only need to
OPENGL_PROFILE something other than defaults if you
specifically want just a non compatible graphics context.
It sounds like the Intel driver might require OPENGL_PROFILE<span
class=""> </span>if you want to enable the latest GL
features, something you won't need under NVIidia and
possible AMD. Try using the OSG_GL_CONTEXT_VERSION and
OSG_GL_CONTEXT_PROFILE_MASK env vars instead of the above
DisplaySettings::instance() code i,e,<br>
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<div>export OSG_GL_CONTEXT_VERSION=4.0<br>
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<div>export OSG_GL_CONTEXT_PROFILE_MASK=1</div>
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Ok I'll fire off a build without passing any cmake options and check
what happens when I just set the environment variables.<br>
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Yes as mentioned this also works. But the open issue for
me still remains the first context created by
osgEarth::Capabilities::
<div bgcolor="#FFFFFF">Capabilities (see first of the
stack traces I posted above). In my view either this
is a bug in osgEarth that it creates the traits
without honouring the desired GL version, or OSG
should otherwise ensure the traits contain the
overridden GL version.<span class="gmail-HOEnZb"></span></div>
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<div>I don't think it's appropriate to classify a bug for
something that is retrospectively using the software with
drivers that add their own constraints. The OSG hasn't
ever worked the way you want it to work - I've only just
integrated the changes to the OSG to support passing the
GL versions for GLX, so only now can we start talking
about passing on suggestions of how to utilize it to the
osgEath team.<br>
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Sure. However I'm curious, how is the logic supposed to work under
Windows, where support for specifying the GL version was already
implemented? Wouldn't you hit the same issues on that platform also?<br>
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<div>I see it as a constraint on osgEarth working with Intel
drivers and recent GL versions and associate drivers.
What we are talking about is working around these
constraints in the driver to provide to full osgEarth
functionality across a wider range of hardware. The first
step has been to add the GL version functionality to OSG's
GLX support. <br>
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<div>Whether we need to push any changes to osgEarth is
something I'm not clear on, if the above export's now work
with OSG master and osgEarth then I think we are most of
the way to getting what is reasonable to expect.<br>
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Not that I want to be annoying or repetitive, but surely it's not
ideal that osgEarth::Capabilities::Capabilities performs it's checks
with a 1.0 context, even though you specify
OSG_GL_CONTEXT_VERSION=4.0? Or am I missing something here?<br>
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Best<br>
Sandro<br>
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