Hardware acceleration

Hardware acceleration

[Thiago Padilha]

Hi

I'm testing cygwin hardware acceleration using the instructions found
here: http://cygwin.com/xfree/docs/ug/using-aiglx.html

When running the the default options(which implies -wgl) I can see my
graphics card (Intel HD graphics 3000) when running glxinfo | grep
OpenGL

If I start the server with -nowgl, I see the software renderer.

The problem is that I see absolutely no difference between the two
when running the 'glxgears' program: It starts fine and stays like
that for 2-3 seconds, then I start to see some flickering(the gears
seem to be constantly "struggling to rotate), but the fps displayed in
the terminal is not affected(I get a constant  average of 1500fps),
just the rendering gets strange.

Perhaps I'm missing something(some other lib that needs to be installed)?

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Re: Hardware acceleration

[richardvoigt]

> that for 2-3 seconds, then I start to see some flickering(the gears
> seem to be constantly "struggling to rotate), but the fps displayed in
> the terminal is not affected(I get a constant  average of 1500fps),
> just the rendering gets strange.

What you're seeing is a result of aliasing, which is an interaction
between the framerate of the software and the refresh rate of the
display.

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Re: Hardware acceleration

[Thiago Padilha]

Thanks for the info richard. Perhaps you have some hint on how I can
configure aliasing correctly or fix this issue?

On Fri, Mar 29, 2013 at 1:11 PM, richardvoigt@gmail.com
<richardvoigt@gmail.com> wrote:
>> that for 2-3 seconds, then I start to see some flickering(the gears
>> seem to be constantly "struggling to rotate), but the fps displayed in
>> the terminal is not affected(I get a constant  average of 1500fps),
>> just the rendering gets strange.
>
> What you're seeing is a result of aliasing, which is an interaction
> between the framerate of the software and the refresh rate of the
> display.
>
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