Re: unsupported extensions?

Subject: Re: unsupported extensions?

From: Jean-Francois Roy <email@hidden>

Date: Sun, 4 May 2008 16:23:50 -0400

Delivered-to: email@hidden

Cg on Mac OS X (at least by default) emits ARB assembly, not GLSL.

In general, the nVidia "G80 extensions" come in two "flavors": a "NV program" version and a "EXT shader" version. The former target ARB assembler shaders, while the latter target GLSL shaders. Apple is only investing in GLSL at this point, and so you won't get any of the ARB assembler-related extensions, while most of the important GLSL extensions are available.

In your specific case, look for EXT_transform_feedback and EXT_gpu_shader4.

Ultimately, the solution to your problem is either to have the Cg compiler emit GLSL, or port your Cg shaders to GLSL.

On May 4, 2008, at 15:10, Thijs Koerselman wrote:

Update:

I've successfully ported the transform_feedback_fractal example from the Cg SDK to work in XCode, but it won't run since it doesn't pass the GLEW extension test. GL_NV_gpu_program4 and GL_NV_transform_feedback are not supported by my driver:(

I guess that's the end of it. I'm out of ideas.

Someone please prove me wrong and tell me transform feedback is supported by AGL / 8800GT.

It's a bit of a disappointment to get a new graphics card and find out that not all features are supported.

Thijs

Disclaimer: the content of this email represents my personal opinions and not those of my employer.

_______________________________________________ Do not post admin requests to the list. They will be ignored. Mac-opengl mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/mac-opengl/email@hidden This email sent to email@hidden

References:

>unsupported extensions? (From: "Thijs Koerselman" <email@hidden>)

>Re: unsupported extensions? (From: Kamil Rocki <email@hidden>)

>Re: unsupported extensions? (From: "Thijs Koerselman" <email@hidden>)