...

1 files changed, 38 insertions, 1 deletions

diff --git a/include/cru/platform/graphics/Geometry.h b/include/cru/platform/graphics/Geometry.h
index 732fc547..d1ebd186 100644
--- a/include/cru/platform/graphics/Geometry.h
+++ b/include/cru/platform/graphics/Geometry.h
@@ -9,10 +9,47 @@ struct CRU_PLATFORM_GRAPHICS_API IGeometry : virtual IGraphicsResource {
 // After called Build, calling every method will throw a
 
 struct CRU_PLATFORM_GRAPHICS_API IGeometryBuilder : virtual IGraphicsResource {
-  virtual void BeginFigure(const Point& point) = 0;
+  virtual Point GetCurrentPosition() = 0;
+
+  virtual void MoveTo(const Point& point) = 0;
+  void RelativeMoveTo(const Point& offset) {
+    MoveTo(GetCurrentPosition() + offset);
+  }
+
   virtual void LineTo(const Point& point) = 0;
+  void RelativeLineTo(const Point& offset) {
+    LineTo(GetCurrentPosition() + offset);
+  }
+
+  virtual void CubicBezierTo(const Point& start_control_point,
+                             const Point& end_control_point,
+                             const Point& end_point) = 0;
+  void RelativeCubicBezierTo(const Point& start_control_offset,
+                             const Point& end_control_offset,
+                             const Point& end_offset) {
+    auto current_position = GetCurrentPosition();
+    CubicBezierTo(current_position + start_control_offset,
+                  current_position + end_control_offset,
+                  current_position + end_offset);
+  }
+
   virtual void QuadraticBezierTo(const Point& control_point,
                                  const Point& end_point) = 0;
+  void RelativeQuadraticBezierTo(const Point& control_offset,
+                                 const Point& end_offset) {
+    auto current_position = GetCurrentPosition();
+    QuadraticBezierTo(current_position + control_offset,
+                      current_position + end_offset);
+  }
+
+  virtual void ArcTo(const Point& radius, float angle, bool is_large_arc,
+                     bool is_clockwise, const Point& end_point) = 0;
+  void RelativeArcTo(const Point& radius, float angle, bool is_large_arc,
+                     bool is_clockwise, const Point& end_offset) {
+    ArcTo(radius, angle, is_large_arc, is_clockwise,
+          GetCurrentPosition() + end_offset);
+  }
+
   virtual void CloseFigure(bool close) = 0;
 
   virtual std::unique_ptr<IGeometry> Build() = 0;