[Mesa-dev] can we have gl_framebuffer _NumColorDrawBuffers = 1 and all the entries in the array NULL

[Dave Airlie]

>
> Yes, it's legal. Drivers should handle NULL color buffer bindings and
> there is a test for it:
> http://cgit.freedesktop.org/piglit/commit/?id=ff2398a4e3c4805e7d1bea38f4ae6f9811b42ede
>
> I fixed it just recently.
>

Ah okay on r600g this is broken due to how we work out the
CB_TARGET_MASK, the kernel cs checker gives out,

I'll fixup the patch I wrote and send it.

Dave.