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OpenGL GLSL Support on Graphics Cards

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[font=georgia,serif]Hi,[/font]

[font=georgia,serif]I am considering making a fairly large change to my codebase that would remove support for OpenGL 2 style shaders. This would allow me to clean up my code some and make some graphics algorithms more intuitive to implement.[/font]

[font=georgia,serif]However, I am concerned about the effect this will have on support. I want to be able to support pretty old hardware. The minimum standard I want to support is my old laptop, with a GeForce 8400M GS graphics card (which has OpenGL 2 support).[/font]

[font=georgia,serif]I did a lot of graphics development on that computer, and many OpenGL 3 and 4 features were available as extensions (e.g. FBOs). What I am wondering is whether OpenGL 3 style GLSL (i.e. GLSL 1.3+) can run with extensions on that platform.[/font]

[font=georgia,serif]Unfortunately, I don't have the laptop in this state to test that, and I wasn't able to find anything online. Where can I find out what GLSL versions are supported natively and through extensions on particular cards?[/font]

[font=georgia,serif]Thanks,[/font]
[font=georgia,serif]-G[/font]

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[url="http://www.realtech-vr.com/glview/"]GLview[/url] is a utility that will give you details on the OpenGL support of the card you have such as the exact version and all extensions. If you just want to know what version of glsl you have its as follows:

GLSL Version OpenGL Version
1.10.59..............2.0
1.20.8................2.1
1.30.10..............3.0
1.40.08..............3.1
1.50.11..............3.2
3.30.6................3.3
4.00.9................4.0
4.10.6................4.1
4.20.6................4.2
4.30.6................4.3

The chart is from Wikipedia: [url="http://en.wikipedia.org/wiki/GLSL."]http://en.wikipedia.org/wiki/GLSL.[/url] Edited by ic0de

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[quote name='Geometrian' timestamp='1350674134' post='4991873']
[font=georgia,serif]As I wrote, "[u]nfortunately, I don't have the laptop in this state to test", otherwise it would be trivial.[/font]
[/quote]

http://feedback.wildfiregames.com/report/opengl/device/GeForce%208400GS

bam! capabilities of opengl 8400gs

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[quote name='ic0de' timestamp='1350683711' post='4991955'][url="http://feedback.wildfiregames.com/report/opengl/device/GeForce%208400GS"]http://feedback.wild.../GeForce 8400GS[/url][/quote][font=georgia,serif]Marvelous! I actually wanted the 8400[i]M[/i] GS, but that was easy to find on a linked page.[/font]

[font=georgia,serif]It [i]looks[/i] like it would be supported (at least nearly all extensions seem to be supported on both Linux and Windows).[/font]

[font=georgia,serif]I would like to confirm this, though. I know from experience that the card supports OpenGL 2 style shaders, but what extension introduces OpenGL 3 style shaders? I was under the (possibly mistaken) impression that it was the original extensions that were just updated. Would the website be reporting support for these latest versions of the extensions then?[/font]

[font=georgia,serif]Thanks,[/font]
[font=georgia,serif]G[/font] Edited by Geometrian

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