This should be the number of uniforms declared in all shader, except unused uniforms which may have been optimized out.
# Number of active attributes in this program
#
# This should be the number of uniforms declared in all shader, except
# unused uniforms which may have been optimized out.
fun n_active_attributes: Int do return glGetProgramiv(self, gl_ACTIVE_ATTRIBUTES)
lib/glesv2/glesv2.nit:98,2--102,82