https://bugs.freedesktop.org/show_bug.cgi?id=35425

--- Comment #4 from Marek Olšák <mar...@gmail.com> 2011-04-07 13:13:46 PDT ---
(In reply to comment #3)
> The application is *BROKEN*.  gl_InstanceID is *NOT* part of
> GL_ARB_draw_instanced.  The correct name is gl_InstanceIDARB.

Due to this, it would be safer not to advertise ARB_draw_instanced without
EXT_gpu_shader4. I haven't seen an app that uses gl_InstanceIDARB when it
should. All apps based on Unigine Engine check for ARB_draw_instanced and use
gl_InstanceID.

It's pointless to follow the GL spec if no app follows it either.

My 2 eurocents.

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