[Mesa-dev] EXT_texture_snorm - is it possible in GL2?

Brian Paul brianp at vmware.com
Thu Mar 10 15:04:37 PST 2011

On 03/10/2011 03:46 PM, Marek Olšák wrote:
> Hi,
> The specification of GL_EXT_texture_snorm says:
> OpenGL 3.0 is required.
> This extension is written against the OpenGL 3.0 specification.
> which simply means we cannot advertise the extension on GL2.1. Would
> anyone be against violating the requirement?

Fine by me.

> The thing is even some of GL2 hardware can do it, and GL3 likely won't
> be supported anytime soon due to unresolved patent issues.

I think some OpenGL specs say they require a newer version of GL than 
is strictly necessary.  As a spec writer it's sometimes easier to base 
the extension on a newer version of a spec than an older one.  And 
vendors tend to base their extensions on whatever of GL version 
they're shipping, not older versions.


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