[Bug 66067] Trine 2's fragment normal buffer is mixtextured on Radeon HD 6770 (Juniper)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=66067

--- Comment #32 from Nicholas Miell <nmiell at gmail.com> ---
(In reply to Daniel Scharrer from comment #31)
> It selects between the 2D and SHADOW2D samplers based on the number of
> components in the coordinate vector. This matches the documentation [1]
> which, unlike the tutorial you quoted, makes no mention of the shadow test
> depending on the texture format or compare mode.
> 
> [1] http://http.developer.nvidia.com/Cg/tex2Dproj.html

Yeah, my understanding and explanation as recorded in this bug is scattershot,
misleading, and wrong.

I've meant to update it with an accurate summary of the problem, but there
seemed to be hostility towards the idea of matching nvidia's behavior instead
of demanding everybody else change their (technically buggy but in practice
perfectly correct) software so I haven't bothered.

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