3 files changed, 29 insertions, 1 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;
diff --git a/include/cru/platform/graphics/cairo/CairoGeometry.h b/include/cru/platform/graphics/cairo/CairoGeometry.h
index 1d69ebf2..7d2b1bcd 100644
--- a/include/cru/platform/graphics/cairo/CairoGeometry.h
+++ b/include/cru/platform/graphics/cairo/CairoGeometry.h
@@ -31,6 +31,10 @@ class CRU_PLATFORM_GRAPHICS_CAIRO_API CairoGeometry : public CairoResource,
 class CRU_PLATFORM_GRAPHICS_CAIRO_API CairoGeometryBuilder
     : public CairoResource,
       public virtual IGeometryBuilder {
+ private:
+  constexpr static auto kLogTag =
+      "cru::platform::graphics::cairo::CairoGeometryBuilder";
+
  public:
   explicit CairoGeometryBuilder(CairoGraphicsFactory* factory);
   ~CairoGeometryBuilder() override;
@@ -45,7 +49,8 @@ class CRU_PLATFORM_GRAPHICS_CAIRO_API CairoGeometryBuilder
                      const Point& end_point) override;
   void QuadraticBezierTo(const Point& control_point,
                          const Point& end_point) override;
-
+  void ArcTo(const Point& radius, float angle, bool is_large_arc,
+             bool is_clockwise, const Point& end_point) override;
   void CloseFigure(bool close) override;
 
   std::unique_ptr<IGeometry> Build() override;
diff --git a/include/cru/platform/graphics/quartz/Geometry.h b/include/cru/platform/graphics/quartz/Geometry.h
index e13d268e..631aa56f 100644
--- a/include/cru/platform/graphics/quartz/Geometry.h
+++ b/include/cru/platform/graphics/quartz/Geometry.h
@@ -26,6 +26,10 @@ class QuartzGeometry : public OsxQuartzResource, public virtual IGeometry {
 
 class QuartzGeometryBuilder : public OsxQuartzResource,
                               public virtual IGeometryBuilder {
+ private:
+  constexpr static auto kLogTag =
+      "cru::platform::graphics::quartz::QuartzGeometryBuilder";
+
  public:
   explicit QuartzGeometryBuilder(IGraphicsFactory* graphics_factory);
 
@@ -43,6 +47,9 @@ class QuartzGeometryBuilder : public OsxQuartzResource,
                      const Point& end_point) override;
   void QuadraticBezierTo(const Point& control_point,
                          const Point& end_point) override;
+  void ArcTo(const Point& radius, float angle, bool is_large_arc,
+             bool is_clockwise, const Point& end_point) override;
+
   void CloseFigure(bool close) override;
 
   std::unique_ptr<IGeometry> Build() override;