So are you saying that Cg can work with Non-nVidia Hardware?
Wolfgang Draxinger wrote:
> Knockr wrote:
>
> > Thanks alot for your prompt reply. It was really helpful.
> >
> > I'm also using Cg fragment programs with my application. Is it
> > possible to execute it without "GL_NV_fragment_program"?
>
> Yes, Cg has a profile, that explicitly emits ARB programs.
>
> > will it work fine with "GL_ARB_fragment_program "?
>
> If you enable the correct profile, then yes. Usually the Cg
> library figures out, what capabilities the OpenGL implementation
> has and switches to the correct profile.
>
> Or instead of using Cg you might want to use GLSL.
>
> > In my understanding "GL_NV_fragment_program " is required.
>
> No. NV extensions are only avaliable on NVidia hardware, but
> AMD/ATI hardware does vertex/fragment programs as well.
>
> There are however certain features that are only avaliable
> through NV extensions. For example geometry programs of shader
> model 4. NVidias implementation of GLSL is in fact a meta
> compiler, that compiles to ARB/NV_xxx_program code, which is
> then sent to the OpenGL driver in turn. Officially SM4
> functionality is to be exposed through GLSL, however I prefer
> the lower level assembler code.
>
> Wolfgang Draxinger
> --
> E-Mail address works, Jabber: hexarith@[EMAIL PROTECTED]
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