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v2 (Paul Berry <stereotype441@gmail.com>): Account for rework of builtin_variables.cpp. Use INTERP_QUALIFIER_FLAT for gl_PrimitiveID so that it will obey provoking vertex conventions. Convert to GLSL 1.50 style geometry shaders. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> v3 (Paul Berry <stereotype441@gmail.com>): Be less obscure about setting interpolation field of gl_Primitive variables. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>