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#1 (**permalink**) 02-21-2008, 10:32 AM

I do not know very much on OpenGL standard
and I would like to know if it is sensible to compile-in this functionality
into *xorg-x11* and other packages (that have the flag USE="opengl")
if I have no *awesome* video adapter on my system that tould be intended for
3-D video games?

How to probe the hardware to know if it supports such things (relevant with
USE flags)?

--
S

#2 (**permalink**) 02-21-2008, 10:32 AM

S wrote:
> How to probe the hardware to know if it supports such things

The standard tests within X are to run glxinfo (whether the "direct
rendering" line shows yes or no) and glxgears (for a simple speed test).

Google on the model of your video card, to find out what it's capable
of.

#3 (**permalink**) 02-21-2008, 10:32 AM

Paul Bredbury wrote:

> The standard tests within X are to run glxinfo (whether the "direct
> rendering" line shows yes or no)

So, if it showed "no" was it definite proof the hardware did not support
OpenGL?
Or maybe it wasn't somehow software-enabled, e.g. some module was not
properly loaded etc...

> and glxgears (for a simple speed test).

still the same question: is this testing utility really
software/OS-transparent?
and this what it shows is not affected by how the operating system and x11
are configured?

> Google on the model of your video card, to find out what it's capable
> of.

the problem is the vendor's info only shows what the card *can* do
and never specifies what it lacks ;-)

--
S

#4 (**permalink**) 02-21-2008, 10:32 AM

S wrote:
> So, if it showed "no" was it definite proof the hardware did not
> support OpenGL?

No, if you have the most feature-filled graphics card in the world, it
still needs the software configuration to be correct, to be able to
*utilize* the hardware.

> the problem is the vendor's info only shows what the card *can* do
> and never specifies what it lacks ;-)

Then do not be so blinkered in your googling. Search for what other
*Linux* users say about the model. If they're all moaning about opengl
not working, then you can draw an obvious conclusion.

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do I need USE="opengl" for a simple card?