From 17f9566f5c654ce0b4ec2d263b7f2fa68755d6ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lo=C3=AFc=20Bartoletti?= <loic.bartoletti@oslandia.com>
Date: Mon, 2 Oct 2023 15:30:52 +0200
Subject: [PATCH] add capi

---
 src/capi/sfcgal_c.cpp | 20 ++++++++++++++++++++
 src/capi/sfcgal_c.h   | 11 +++++++++++
 2 files changed, 31 insertions(+)

diff --git a/src/capi/sfcgal_c.cpp b/src/capi/sfcgal_c.cpp
index 350bbf4c..55c3c813 100644
--- a/src/capi/sfcgal_c.cpp
+++ b/src/capi/sfcgal_c.cpp
@@ -1170,6 +1170,26 @@ sfcgal_geometry_has_validity_flag(const sfcgal_geometry_t *geom) -> int
   return g1->hasValidityFlag() ? 1 : 0;
 }
 
+extern "C" auto
+sfcgal_geometry_extrude_straight_skeleton(const sfcgal_geometry_t *geom, double height)
+    -> sfcgal_geometry_t *
+{
+  const auto *g1 = reinterpret_cast<const SFCGAL::Geometry *>(geom);
+  std::unique_ptr<SFCGAL::PolyhedralSurface> polys;
+
+  try {
+    polys = SFCGAL::algorithm::extrudeStraightSkeleton(*g1, height);
+  } catch (std::exception &e) {
+    SFCGAL_WARNING("During straight_extrude_skeleton_distance(A):");
+    SFCGAL_WARNING("  with A: %s",
+                   ((const SFCGAL::Geometry *)(geom))->asText().c_str());
+    SFCGAL_ERROR("%s", e.what());
+    return nullptr;
+  }
+
+  return polys.release();
+}
+
 extern "C" auto
 sfcgal_geometry_straight_skeleton_distance_in_m(const sfcgal_geometry_t *geom)
     -> sfcgal_geometry_t *
diff --git a/src/capi/sfcgal_c.h b/src/capi/sfcgal_c.h
index 5d386425..3334055b 100644
--- a/src/capi/sfcgal_c.h
+++ b/src/capi/sfcgal_c.h
@@ -980,6 +980,17 @@ sfcgal_geometry_straight_skeleton(const sfcgal_geometry_t *geom);
 SFCGAL_API sfcgal_geometry_t *
 sfcgal_geometry_straight_skeleton_distance_in_m(const sfcgal_geometry_t *geom);
 
+/**
+ * Returns the extrude straight skeleton of the given Polygon
+ * @pre geom must be a Polygon
+ * @pre isValid(geom) == true
+ * @pre isValid(geom) == true
+ * @post isValid(return) == true
+ * @ingroup capi
+ */
+SFCGAL_API sfcgal_geometry_t *
+sfcgal_geometry_extrude_straight_skeleton(const sfcgal_geometry_t *geom, double height);
+
 /**
  * Returns the approximate medial axis for the given Polygon
  * Approximate medial axis is based on straight skeleton