The two rasterpos fails looks related to GLSL linking, the vertex
shader is linked with the geometry shader which doesn't use any
of it's outputs so they seem to get removed, which stops the rasterpos
from working.
Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12374>