On Thu, Oct 24, 2013 at 4:31 AM, Chris Bagley chris.bagley@gmail.comwrote:
I have two users for whom a call to (gl:get-integer :num-extensions) errors with: OpenGL signaled (1280 . iNVLID-ENUM) from GET-INTGER-V
I think :num-extensions requires a GL 3.0+ context, so in general you should check that before using it.
The only thing they both have in common it seems is OSX
It seems from here https://developer.apple.com/library/mac/releasenotes/general/macosxlionapidi... this enum was only added in OsX 10.7 (Lion) but at least one of these folks is using mavericks which has 4.2 support (so I'm told :))
On OSX, I think you need to specifically request 3.0+ when creating the context, or it will only give you a 2.x context since it actually separates out the core profile. (On other platforms I think NVidia and AMD drivers will default to the highest version it supports, but enable the backwards compatibility extension or profile or whatever it is)