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diff --git a/lib/art/art_svp_wind.h b/lib/art/art_svp_wind.h
new file mode 100644
index 0000000..2b7efc5
--- /dev/null
+++ b/lib/art/art_svp_wind.h
@@ -0,0 +1,57 @@
+/* Libart_LGPL - library of basic graphic primitives
+ * Copyright (C) 1998 Raph Levien
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __ART_SVP_WIND_H__
+#define __ART_SVP_WIND_H__
+
+/* Primitive intersection and winding number operations on sorted
+   vector paths. */
+
+#ifdef LIBART_COMPILATION
+#include "art_svp.h"
+#else
+#include "art_svp.h"
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#ifndef ART_WIND_RULE_DEFINED
+#define ART_WIND_RULE_DEFINED
+typedef enum {
+  ART_WIND_RULE_NONZERO,
+  ART_WIND_RULE_INTERSECT,
+  ART_WIND_RULE_ODDEVEN,
+  ART_WIND_RULE_POSITIVE
+} ArtWindRule;
+#endif
+
+ArtSVP *
+art_svp_uncross (ArtSVP *vp);
+
+ArtSVP *
+art_svp_rewind_uncrossed (ArtSVP *vp, ArtWindRule rule);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __ART_SVP_WIND_H__ */