2 files changed, 11 insertions, 18 deletions
diff --git a/include/cru/platform/graphics/Painter.h b/include/cru/platform/graphics/Painter.h
index de44c7b4..2e122a08 100644
--- a/include/cru/platform/graphics/Painter.h
+++ b/include/cru/platform/graphics/Painter.h
@@ -1,4 +1,5 @@
 #pragma once
+#include <type_traits>
 #include "Base.h"
 
 namespace cru::platform::graphics {
@@ -42,5 +43,15 @@ struct CRU_PLATFORM_GRAPHICS_API IPainter : virtual IPlatformResource {
   virtual void PopState() = 0;
 
   virtual void EndDraw() = 0;
+
+  template <typename Fn>
+  std::enable_if_t<std::is_invocable_v<Fn, IPainter*>> WithTransform(
+      const Matrix& matrix, const Fn& action) {
+    const auto old = this->GetTransform();
+    this->PushState();
+    this->ConcatTransform(matrix);
+    action(this);
+    this->PopState();
+  }
 };
 }  // namespace cru::platform::graphics
diff --git a/include/cru/platform/graphics/util/Painter.h b/include/cru/platform/graphics/util/Painter.h
deleted file mode 100644
index e36d5c55..00000000
--- a/include/cru/platform/graphics/util/Painter.h
+++ /dev/null
@@ -1,18 +0,0 @@
-#pragma once
-#include "../Painter.h"
-
-#include <functional>
-#include <type_traits>
-
-namespace cru::platform::graphics::util {
-template <typename Fn>
-void WithTransform(IPainter* painter, const Matrix& matrix, const Fn& action) {
-  static_assert(std::is_invocable_v<decltype(action), IPainter*>,
-                "Action must can be be invoked with painter.");
-  const auto old = painter->GetTransform();
-  painter->PushState();
-  painter->ConcatTransform(matrix);
-  action(painter);
-  painter->PopState();
-}
-}  // namespace cru::platform::graphics::util