3 files changed, 60 insertions, 0 deletions
diff --git a/src/platform_win/CMakeLists.txt b/src/platform_win/CMakeLists.txt
index 40c9d85a..c8a5840e 100644
--- a/src/platform_win/CMakeLists.txt
+++ b/src/platform_win/CMakeLists.txt
@@ -9,6 +9,7 @@ add_library(cru_platform_win STATIC
 	win_geometry.cpp
 	win_graph_factory.cpp
 	win_native_window.cpp
+	win_painter.cpp
 	window_class.cpp
 	window_manager.cpp
 	window_render_target.cpp)
diff --git a/src/platform_win/win_native_window.cpp b/src/platform_win/win_native_window.cpp
index 5c159290..ae740205 100644
--- a/src/platform_win/win_native_window.cpp
+++ b/src/platform_win/win_native_window.cpp
@@ -2,6 +2,7 @@
 
 #include "cru/platform/win/exception.hpp"
 #include "cru/platform/win/win_application.hpp"
+#include "cru/platform/win/win_painter.hpp"
 #include "cru/platform/win/window_class.hpp"
 #include "dpi_util.hpp"
 #include "window_manager.hpp"
@@ -111,6 +112,8 @@ void WinNativeWindow::SetWindowRect(const ui::Rect& rect) {
   }
 }
 
+Painter* WinNativeWindow::BeginPaint() { return new WinPainter(this); }
+
 bool WinNativeWindow::HandleNativeWindowMessage(HWND hwnd, UINT msg,
                                                 WPARAM w_param, LPARAM l_param,
                                                 LRESULT* result) {
diff --git a/src/platform_win/win_painter.cpp b/src/platform_win/win_painter.cpp
new file mode 100644
index 00000000..29777669
--- /dev/null
+++ b/src/platform_win/win_painter.cpp
@@ -0,0 +1,56 @@
+#include "cru/platform/win/win_painter.hpp"
+
+#include "cru/platform/win/exception.hpp"
+#include "cru/platform/win/graph_manager.hpp"
+#include "cru/platform/win/win_brush.hpp"
+#include "cru/platform/win/win_geometry.hpp"
+#include "cru/platform/win/win_native_window.hpp"
+#include "cru/platform/win/window_render_target.hpp"
+
+#include <cassert>
+
+namespace cru::platform::win {
+WinPainter::WinPainter(WinNativeWindow* window) {
+  assert(window);
+  window_ = window;
+  const auto window_render_target = window_->GetWindowRenderTarget();
+  render_target_ =
+      window_render_target->GetGraphManager()->GetD2D1DeviceContext();
+  window_render_target->SetAsTarget();
+  render_target_->BeginDraw();
+}
+
+WinPainter::~WinPainter() {
+  if (!IsDisposed()) {
+    ThrowIfFailed(render_target_->EndDraw());
+  }
+}
+
+void WinPainter::StrokeGeometry(Geometry* geometry, Brush* brush, float width) {
+  assert(!IsDisposed());
+  const auto g = dynamic_cast<WinGeometry*>(geometry);
+  assert(g);
+  const auto b = dynamic_cast<WinBrush*>(brush);
+  assert(b);
+
+  render_target_->DrawGeometry(g->GetNative(), b->GetD2DBrush(), width);
+}
+
+void WinPainter::FillGeometry(Geometry* geometry, Brush* brush) {
+  assert(!IsDisposed());
+  const auto g = dynamic_cast<WinGeometry*>(geometry);
+  assert(g);
+  const auto b = dynamic_cast<WinBrush*>(brush);
+  assert(b);
+
+  render_target_->FillGeometry(g->GetNative(), b->GetD2DBrush());
+}
+
+void WinPainter::EndDraw() {
+  if (!IsDisposed()) {
+    ThrowIfFailed(render_target_->EndDraw());
+    render_target_ = nullptr;
+    is_disposed = true;
+  }
+}
+}  // namespace cru::platform::win