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+/*
+ * Copyright © 2024 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ */
+
+#ifndef HB_SUBSET_INSTANCER_IUP_HH
+#define HB_SUBSET_INSTANCER_IUP_HH
+
+#include "hb-subset-plan.hh"
+/* given contour points and deltas, optimize a set of referenced points within error
+ * tolerance. Returns optimized referenced point indices */
+HB_INTERNAL bool iup_delta_optimize (const contour_point_vector_t& contour_points,
+ const hb_vector_t<int>& x_deltas,
+ const hb_vector_t<int>& y_deltas,
+ hb_vector_t<bool>& opt_indices, /* OUT */
+ float tolerance = 0.f);
+
+#endif /* HB_SUBSET_INSTANCER_IUP_HH */