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Neosettler

How to create a 2.1 context on recent Nvidia hardware?

6 posts in this topic

Greetings everyone,

back in the not so distant past, I was able to create a 2.1 context on 4.x hardware. I'm using a GeForce 690 with the 306.97 driver. It seems like the driver select the highest available context depend on the video card capabilities event when asking for a 2.1 context.

I use [url="http://www.sfml-dev.org/"]SFML[/url]to create the GLcontext and the head developer is saying that he cant do nothing about this automated feature.

I looked in the Nvidia control panel and there is nothing regard this issue, how is that possible?
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There is no way to request a specific version before 3.0, but it doesn't matter anyway since nothing changes for new versions.
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[quote name='Brother Bob' timestamp='1354303575' post='5005799']
it doesn't matter anyway since nothing changes for new versions.[/quote]
To clarify that a little, while newer versions of OpenGL add many features, they don't take any away (unless you specifically request a 'Core' profile, which will prevent the use of all deprecated functionality).
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[quote](unless you specifically request a 'Core' profile, which will prevent the use of all deprecated functionality).[/quote]

Thank you for your clarification swiftcoder and how do you specify this exactly?
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[quote name='Neosettler' timestamp='1354306053' post='5005820']
Thank you for your clarification swiftcoder and how do you specify this exactly?[/quote]
As far as I am aware, SFML doesn't support requesting a core profile.

See [url="https://github.com/LaurentGomila/SFML/issues/176"]https://github.com/L...SFML/issues/176[/url]
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[quote name='Neosettler' timestamp='1354303028' post='5005794']It seems like the driver select the highest available context depend on the video card capabilities event when asking for a 2.1 context. I use [url="http://www.sfml-dev.org/"]SFML[/url]to create the GLcontext and the head developer is saying that he cant do nothing about this automated feature. I looked in the Nvidia control panel and there is nothing regard this issue, how is that possible? [/quote]
The problem is in using SFML. Why wouldn't you create context on your own? (I'm allergic on wrappers/libraries.)
GL 2.1 context can be created as simple as calling wglCreateContext(). SFML probably uses wglCreateContextAttribsARB(), and it returns the highest supported version. wglCreateContext() cannot create higher that GL 2.1 context even if you want that.
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