SPIR-V has a concept of a function type that's used fairly heavily. We
could special-case function types in SPIR-V -> NIR but it's easier if we
just add support to glsl_types.
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
It's a bit more descriptive since it is the base type that you get when you
sample from it. Also, the next commit adds a bare "sampler" type and we
need glsl_type::sampler_type available for a public static member.
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Commit c98deb18d5 in 2010 disallowed embedded struct definitions
in ES. Then in 2013 d9bb8b7b56 disallowed it for everything but
GLSL 1.10.
Commit c98deb18d5 seemed the cleanest way to do the check so its
been extended to cover GL and the other version has been removed.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
