+ if ((consumer_var == NULL && producer_var->type->contains_integer()) ||
+ !consumer_is_fs) {
+ /* Since this varying is not being consumed by the fragment shader, its
+ * interpolation type varying cannot possibly affect rendering. Also,
+ * this variable is non-flat and is (or contains) an integer.
+ *
+ * lower_packed_varyings requires all integer varyings to flat,
+ * regardless of where they appear. We can trivially satisfy that
+ * requirement by changing the interpolation type to flat here.
+ */
+ producer_var->centroid = false;
+ producer_var->interpolation = INTERP_QUALIFIER_FLAT;
+
+ if (consumer_var) {
+ consumer_var->centroid = false;
+ consumer_var->interpolation = INTERP_QUALIFIER_FLAT;
+ }
+ }
+