...

2 files changed, 76 insertions, 1 deletions

diff --git a/include/cru/platform/graphics/cairo/CairoGeometry.h b/include/cru/platform/graphics/cairo/CairoGeometry.h
index f510d687..b1c31a18 100644
--- a/include/cru/platform/graphics/cairo/CairoGeometry.h
+++ b/include/cru/platform/graphics/cairo/CairoGeometry.h
@@ -29,5 +29,28 @@ class CRU_PLATFORM_GRAPHICS_CAIRO_API CairoGeometry : public CairoResource,
 
 class CRU_PLATFORM_GRAPHICS_CAIRO_API CairoGeometryBuilder
     : public CairoResource,
-      public virtual IGeometryBuilder {};
+      public virtual IGeometryBuilder {
+ public:
+  explicit CairoGeometryBuilder(CairoGraphicsFactory* factory);
+  ~CairoGeometryBuilder() override;
+
+ public:
+  Point GetCurrentPosition() override;
+
+  void MoveTo(const Point& point) override;
+  void LineTo(const Point& point) override;
+  void CubicBezierTo(const Point& start_control_point,
+                     const Point& end_control_point,
+                     const Point& end_point) override;
+  void QuadraticBezierTo(const Point& control_point,
+                         const Point& end_point) override;
+
+  void CloseFigure(bool close) override;
+
+  std::unique_ptr<IGeometry> Build() override;
+
+ private:
+  cairo_surface_t* surface_;
+  cairo_t* cairo_;
+};
 }  // namespace cru::platform::graphics::cairo
diff --git a/src/platform/graphics/cairo/CairoGeometry.cpp b/src/platform/graphics/cairo/CairoGeometry.cpp
index 3b6ca874..2d415884 100644
--- a/src/platform/graphics/cairo/CairoGeometry.cpp
+++ b/src/platform/graphics/cairo/CairoGeometry.cpp
@@ -2,6 +2,8 @@
 #include "cru/platform/graphics/Geometry.h"
 #include "cru/platform/graphics/cairo/CairoGraphicsFactory.h"
 
+#include <cairo/cairo.h>
+
 namespace cru::platform::graphics::cairo {
 CairoGeometry::CairoGeometry(CairoGraphicsFactory* factory,
                              cairo_path_t* cairo_path, const Matrix& transform,
@@ -72,4 +74,54 @@ std::unique_ptr<IGeometry> CairoGeometry::Transform(const Matrix& matrix) {
 std::unique_ptr<IGeometry> CairoGeometry::CreateStrokeGeometry(float width) {
   throw Exception(u"Not implemented");
 }
+
+CairoGeometryBuilder::CairoGeometryBuilder(CairoGraphicsFactory* factory)
+    : CairoResource(factory) {
+  surface_ = cairo_recording_surface_create(CAIRO_CONTENT_COLOR_ALPHA, nullptr);
+  cairo_ = cairo_create(surface_);
+  cairo_new_path(cairo_);
+  cairo_move_to(cairo_, 0.0, 0.0);
+}
+
+CairoGeometryBuilder::~CairoGeometryBuilder() {
+  cairo_destroy(cairo_);
+  cairo_surface_destroy(surface_);
+}
+
+Point CairoGeometryBuilder::GetCurrentPosition() {
+  double x, y;
+  cairo_get_current_point(cairo_, &x, &y);
+  return Point(x, y);
+}
+
+void CairoGeometryBuilder::MoveTo(const Point& point) {
+  cairo_move_to(cairo_, point.x, point.y);
+}
+
+void CairoGeometryBuilder::LineTo(const Point& point) {
+  cairo_line_to(cairo_, point.x, point.y);
+}
+
+void CairoGeometryBuilder::CubicBezierTo(const Point& start_control_point,
+                                         const Point& end_control_point,
+                                         const Point& end_point) {
+  cairo_curve_to(cairo_, start_control_point.x, start_control_point.y,
+                 end_control_point.x, end_control_point.y, end_point.x,
+                 end_point.y);
+}
+
+void CairoGeometryBuilder::QuadraticBezierTo(const Point& control_point,
+                                             const Point& end_point) {
+  CubicBezierTo(control_point, control_point, end_point);
+}
+
+void CairoGeometryBuilder::CloseFigure(bool close) {
+  if (close) cairo_close_path(cairo_);
+}
+
+std::unique_ptr<IGeometry> CairoGeometryBuilder::Build() {
+  cairo_path_t* path = cairo_copy_path(cairo_);
+  return std::unique_ptr<IGeometry>(new CairoGeometry(
+      GetCairoGraphicsFactory(), path, Matrix::Identity(), true));
+}
 }  // namespace cru::platform::graphics::cairo