((function texture2DRect
   (signature vec4
     (parameters
       (declare (in) sampler2DRect sampler)
       (declare (in) vec2 P) )
     ((return (tex (var_ref sampler) (var_ref P) (0 0 0) 1 () ))))

)
 (function shadow2DRect
   (signature vec4
     (parameters
       (declare (in) sampler2DRectShadow sampler)
       (declare (in) vec3 P) )
     ((return (tex (var_ref sampler) (swiz xy (var_ref P)) (0 0 0) 1 (swiz z (var_ref P)) ))))

))