[osg-users] Setting OpenGL and graphics card settings prgrammatically?

[Wojciech Lewandowski]

Hi,

AFAIK there is also a https://developer.nvidia.com/nvapi library.
Unfortunately I have no personal experience with this but I believe it can
be used to prgramatically override the setings usually set with NVidia
Control Panel.

Cheers,
Wojtek


2018-05-10 20:18 GMT+02:00 Daniel Emminizer, Code 5773 <
dan.emminizer at nrl.navy.mil>:

> Hi Chris,
>
> Not sure if this is what you’re looking for, but you can give a hint to
> the drivers by exporting variables in your code.  In my main.cpp I do
> something like:
>
> #ifdef WIN32
> extern "C" {
>
>   /// Declare this variable in public to enable the NVidia side of Optimus
> - http://developer.download.nvidia.com/devzone/devcenter/
> gamegraphics/files/OptimusRenderingPolicies.pdf
>   __declspec(dllexport) int NvOptimusEnablement = 1;
>
>   /// Declare this variable in public to enable the AMD side of AMD
> Switchable Graphics (13.35 driver or newer needed) -
> http://devgurus.amd.com/thread/169965
>   __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
>
> }
> #endif /* WIN32 */
>
>
> We have not had a problem since.
>
>  - Dan
>
>
>
> From: osg-users [mailto:osg-users-bounces at lists.openscenegraph.org] On
> Behalf Of Chris Hanson
> Sent: Thursday, May 10, 2018 2:15 PM
> To: OpenSceneGraph Users
> Subject: [osg-users] Setting OpenGL and graphics card settings
> prgrammatically?
>
>   As you are aware, drivers like the NVidia Windows driver have a variety
> of tuneable settings accessible through the vendor-specific setting
> application. Many times these accomplish things that can't be accessed
> through the standard OpenGL APIs or extensions.
>
>   Is there any way to force settings (like use of dedicated GPU versus
> integrated GPU) from application code via an API?
>
>   Basically, we're trying to avoid having to teach the untrained user how
> to mess with those settings when we know the preferred settings for the
> application.
>
>   Interested in NVidia and optionally AMD, Windows primarily but
> cross-platform APIs are welcomed.
>
>   I'm digging into this: https://docs.nvidia.com/gameworks/index.html#
> gameworkslibrary/coresdk/gsa_api.htm
>
>   to see if it does what I want, but welcome input from others.
>
>
>
> --
> Chris 'Xenon' Hanson, omo sanza lettere. Xenon at AlphaPixel.com
> http://www.alphapixel.com/
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