Hi John,

On Wed, Sep 15, 2010 at 12:43 PM, PCJohn <[email protected]> wrote:
> actually, the only motivation is the support of older hardware which, for
> instance, include my old netbook with Intel 945GM graphics chip (in Core2
> chipset).

Core2 isn't old at all, just a couple of years, so yes this is
something desirable to support.  I'm a bit surprised that GL2 isn't
fully supported.

> It supports NVIDIA's EXT_stencil_two_side extension only. Looking
> on internet, ... I became not sure how far OpenGL went on current netbooks
> and low-power Intel solutions. But maybe, it would be a real loss in the
> "small laptop" world.

Do they not all support OpenGL 2.0?

> Sure, we can drop it, but in my humble opinion, it would be better to leave
> it as it is, e.g. keeping glEnable(GL_STENCIL_TEST_TWO_SIDE) and no support
> for mixing one and two sided stenciling, than to remove the extension
> support completely. But others may have different opinion.

Well we have code that is checked in, and with careful usage would be
safe, but... portability is an issue that anyone uses the NVidia route
would need to take care of.

> Do you think it will be too difficult to develop "proper" solution? I am
> able to put a little bit time to it, if you provide few hints about the
> proper solution.

Perhaps "proper" solution might be something like eating the
GL_STENCIL_TEST_TWO_SIDE when under GL2/ATI.

Robert.
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