struct primconvert_context
 {
    struct pipe_context *pipe;
-   uint32_t primtypes_mask;
+   struct primconvert_config cfg;
    unsigned api_pv;
 };
 
 
 struct primconvert_context *
-util_primconvert_create(struct pipe_context *pipe, uint32_t primtypes_mask)
+util_primconvert_create_config(struct pipe_context *pipe,
+                               struct primconvert_config *cfg)
 {
    struct primconvert_context *pc = CALLOC_STRUCT(primconvert_context);
    if (!pc)
       return NULL;
    pc->pipe = pipe;
-   pc->primtypes_mask = primtypes_mask;
+   pc->cfg = *cfg;
    return pc;
 }
 
+struct primconvert_context *
+util_primconvert_create(struct pipe_context *pipe, uint32_t primtypes_mask)
+{
+   struct primconvert_config cfg = { .primtypes_mask = primtypes_mask };
+   return util_primconvert_create_config(pipe, &cfg);
+}
+
 void
 util_primconvert_destroy(struct primconvert_context *pc)
 {
       enum pipe_prim_type mode = 0;
       unsigned index_size;
 
-      u_index_translator(pc->primtypes_mask,
+      u_index_translator(pc->cfg.primtypes_mask,
                          info->mode, info->index_size, info->count,
                          pc->api_pv, pc->api_pv,
                          info->primitive_restart ? PR_ENABLE : PR_DISABLE,
       enum pipe_prim_type mode = 0;
       unsigned index_size;
 
-      u_index_generator(pc->primtypes_mask,
+      u_index_generator(pc->cfg.primtypes_mask,
                         info->mode, info->start, info->count,
                         pc->api_pv, pc->api_pv,
                         &mode, &index_size, &new_info.count,
 
 
 struct primconvert_context;
 
+struct primconvert_config {
+   uint32_t primtypes_mask;
+};
+
 struct primconvert_context *util_primconvert_create(struct pipe_context *pipe,
                                                     uint32_t primtypes_mask);
+struct primconvert_context *util_primconvert_create_config(struct pipe_context *pipe,
+                                                           struct primconvert_config *cfg);
+
 void util_primconvert_destroy(struct primconvert_context *pc);
 void util_primconvert_save_rasterizer_state(struct primconvert_context *pc,
                                             const struct pipe_rasterizer_state