Stuart Abercrombie authored Nov 14, 2012 and Emma Anholt committed Nov 15, 2012

Triangles should be clipped to the clip volume and therefore shouldn't
end up being rasterized outside the viewport.

This was failing on Sandy Bridge with guard band clipping enabled.

v2: new test name, more comments and addition to all.tests.
v3: Eric's comments incorporated, and the explicit window size removed.
v4: minor style tweaks by Eric, and Brian's probe-related review.

Reviewed-by: Eric Anholt <eric@anholt.net>