1 files changed, 16 insertions, 0 deletions
diff --git a/include/cru/platform/graphics/Geometry.h b/include/cru/platform/graphics/Geometry.h
index ef661f2a..92338750 100644
--- a/include/cru/platform/graphics/Geometry.h
+++ b/include/cru/platform/graphics/Geometry.h
@@ -63,6 +63,22 @@ struct CRU_PLATFORM_GRAPHICS_API IGeometry : virtual IGraphicsResource {
  * virtual so it can override them.
  */
 struct CRU_PLATFORM_GRAPHICS_API IGeometryBuilder : virtual IGraphicsResource {
+ private:
+  constexpr static auto kLogTag = "cru::platform::graphics::IGeometryBuilder";
+
+ public:
+  struct ArcInfo {
+    Point center;
+    // In radian.
+    float start_angle;
+    // In radian.
+    float end_angle;
+  };
+
+  static ArcInfo CalculateArcInfo(const Point& start_point, const Point& radius,
+                                  float angle, bool is_large_arc,
+                                  bool is_clockwise, const Point& end_point);
+
   virtual Point GetCurrentPosition() = 0;
 
   virtual void MoveTo(const Point& point) = 0;